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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/sbus/char
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/sbus/char')
-rw-r--r--drivers/sbus/char/Kconfig93
-rw-r--r--drivers/sbus/char/Makefile25
-rw-r--r--drivers/sbus/char/aurora.c2372
-rw-r--r--drivers/sbus/char/aurora.h276
-rw-r--r--drivers/sbus/char/bbc_envctrl.c645
-rw-r--r--drivers/sbus/char/bbc_i2c.c488
-rw-r--r--drivers/sbus/char/bbc_i2c.h20
-rw-r--r--drivers/sbus/char/bpp.c1079
-rw-r--r--drivers/sbus/char/cd180.h240
-rw-r--r--drivers/sbus/char/cpwatchdog.c832
-rw-r--r--drivers/sbus/char/display7seg.c234
-rw-r--r--drivers/sbus/char/envctrl.c1181
-rw-r--r--drivers/sbus/char/flash.c255
-rw-r--r--drivers/sbus/char/jsflash.c627
-rw-r--r--drivers/sbus/char/max1617.h27
-rw-r--r--drivers/sbus/char/openprom.c630
-rw-r--r--drivers/sbus/char/riowatchdog.c293
-rw-r--r--drivers/sbus/char/rtc.c178
-rw-r--r--drivers/sbus/char/uctrl.c422
-rw-r--r--drivers/sbus/char/vfc.h179
-rw-r--r--drivers/sbus/char/vfc_dev.c742
-rw-r--r--drivers/sbus/char/vfc_i2c.c347
-rw-r--r--drivers/sbus/char/vfc_i2c.h44
23 files changed, 11229 insertions, 0 deletions
diff --git a/drivers/sbus/char/Kconfig b/drivers/sbus/char/Kconfig
new file mode 100644
index 00000000000..90d8ef1f0bc
--- /dev/null
+++ b/drivers/sbus/char/Kconfig
@@ -0,0 +1,93 @@
1
2menu "Misc Linux/SPARC drivers"
3
4config SUN_OPENPROMIO
5 tristate "/dev/openprom device support"
6 help
7 This driver provides user programs with an interface to the SPARC
8 PROM device tree. The driver implements a SunOS-compatible
9 interface and a NetBSD-compatible interface.
10
11 To compile this driver as a module, choose M here: the
12 module will be called openprom.
13
14 If unsure, say Y.
15
16config SUN_MOSTEK_RTC
17 tristate "Mostek real time clock support"
18 help
19 The Mostek RTC chip is used on all known Sun computers except
20 some JavaStations. For a JavaStation you need to say Y both here
21 and to "Enhanced Real Time Clock Support".
22
23 Say Y here unless you are building a special purpose kernel.
24
25config OBP_FLASH
26 tristate "OBP Flash Device support"
27 depends on SPARC64
28 help
29 The OpenBoot PROM on Ultra systems is flashable. If you want to be
30 able to upgrade the OBP firmware, say Y here.
31
32config SUN_BPP
33 tristate "Bidirectional parallel port support (OBSOLETE)"
34 depends on EXPERIMENTAL
35 help
36 Say Y here to support Sun's obsolete variant of IEEE1284
37 bidirectional parallel port protocol as /dev/bppX. Can be built on
38 x86 machines.
39
40config SUN_VIDEOPIX
41 tristate "Videopix Frame Grabber (EXPERIMENTAL)"
42 depends on EXPERIMENTAL && (BROKEN || !64BIT)
43 help
44 Say Y here to support the Videopix Frame Grabber from Sun
45 Microsystems, commonly found on SPARCstations. This card, which is
46 based on the Phillips SAA9051, can handle NTSC and PAL/SECAM and
47 SVIDEO signals.
48
49config SUN_AURORA
50 tristate "Aurora Multiboard 1600se (EXPERIMENTAL)"
51 depends on EXPERIMENTAL && BROKEN
52 help
53 The Aurora Multiboard is a multi-port high-speed serial controller.
54 If you have one of these, say Y.
55
56config TADPOLE_TS102_UCTRL
57 tristate "Tadpole TS102 Microcontroller support (EXPERIMENTAL)"
58 depends on EXPERIMENTAL && SPARC32
59 help
60 Say Y here to directly support the TS102 Microcontroller interface
61 on the Tadpole Sparcbook 3. This device handles power-management
62 events, and can also notice the attachment/detachment of external
63 monitors and mice.
64
65config SUN_JSFLASH
66 tristate "JavaStation OS Flash SIMM (EXPERIMENTAL)"
67 depends on EXPERIMENTAL && SPARC32
68 help
69 If you say Y here, you will be able to boot from your JavaStation's
70 Flash memory.
71
72# XXX Why don't we do "source drivers/char/Config.in" somewhere?
73# no shit
74config APM_RTC_IS_GMT
75 bool
76 depends on EXPERIMENTAL && SPARC32 && PCI
77 default y
78 help
79 Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
80 stores the time in GMT (Greenwich Mean Time). Say N if your RTC
81 stores localtime.
82
83 It is in fact recommended to store GMT in your RTC, because then you
84 don't have to worry about daylight savings time changes. The only
85 reason not to use GMT in your RTC is if you also run a broken OS
86 that doesn't understand GMT.
87
88config RTC
89 tristate "PC-style Real Time Clock Support"
90 depends on PCI && EXPERIMENTAL && SPARC32
91
92endmenu
93
diff --git a/drivers/sbus/char/Makefile b/drivers/sbus/char/Makefile
new file mode 100644
index 00000000000..3a5ea1dc789
--- /dev/null
+++ b/drivers/sbus/char/Makefile
@@ -0,0 +1,25 @@
1#
2# Makefile for the kernel miscellaneous SPARC device drivers.
3#
4# Dave Redman Frame Buffer tuning support.
5#
6# 7 October 2000, Bartlomiej Zolnierkiewicz <bkz@linux-ide.org>
7# Rewritten to use lists instead of if-statements.
8#
9
10vfc-objs := vfc_dev.o vfc_i2c.o
11bbc-objs := bbc_i2c.o bbc_envctrl.o
12
13obj-$(CONFIG_ENVCTRL) += envctrl.o
14obj-$(CONFIG_DISPLAY7SEG) += display7seg.o
15obj-$(CONFIG_WATCHDOG_CP1XXX) += cpwatchdog.o
16obj-$(CONFIG_WATCHDOG_RIO) += riowatchdog.o
17obj-$(CONFIG_OBP_FLASH) += flash.o
18obj-$(CONFIG_SUN_OPENPROMIO) += openprom.o
19obj-$(CONFIG_SUN_MOSTEK_RTC) += rtc.o
20obj-$(CONFIG_SUN_BPP) += bpp.o
21obj-$(CONFIG_SUN_VIDEOPIX) += vfc.o
22obj-$(CONFIG_SUN_AURORA) += aurora.o
23obj-$(CONFIG_TADPOLE_TS102_UCTRL) += uctrl.o
24obj-$(CONFIG_SUN_JSFLASH) += jsflash.o
25obj-$(CONFIG_BBC_I2C) += bbc.o
diff --git a/drivers/sbus/char/aurora.c b/drivers/sbus/char/aurora.c
new file mode 100644
index 00000000000..e5fa1703856
--- /dev/null
+++ b/drivers/sbus/char/aurora.c
@@ -0,0 +1,2372 @@
1/* $Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $
2 * linux/drivers/sbus/char/aurora.c -- Aurora multiport driver
3 *
4 * Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
5 *
6 * This code is based on the RISCom/8 multiport serial driver written
7 * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
8 * driver, written by Linus Torvalds, Theodore T'so and others.
9 * The Aurora multiport programming info was obtained mainly from the
10 * Cirrus Logic CD180 documentation (available on the web), and by
11 * doing heavy tests on the board. Many thanks to Eddie C. Dost for the
12 * help on the sbus interface.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * Revision 1.0
29 *
30 * This is the first public release.
31 *
32 * Most of the information you need is in the aurora.h file. Please
33 * read that file before reading this one.
34 *
35 * Several parts of the code do not have comments yet.
36 *
37 * n.b. The board can support 115.2 bit rates, but only on a few
38 * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal
39 * to OSC_FREQ div 16. In case of my board, each chip can take 6
40 * channels of 115.2 kbaud. This information is not well-tested.
41 *
42 * Fixed to use tty_get_baud_rate().
43 * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
44 */
45
46#include <linux/module.h>
47
48#include <linux/errno.h>
49#include <linux/sched.h>
50#ifdef AURORA_INT_DEBUG
51#include <linux/timer.h>
52#endif
53#include <linux/interrupt.h>
54#include <linux/tty.h>
55#include <linux/tty_flip.h>
56#include <linux/major.h>
57#include <linux/string.h>
58#include <linux/fcntl.h>
59#include <linux/mm.h>
60#include <linux/kernel.h>
61#include <linux/init.h>
62#include <linux/delay.h>
63#include <linux/bitops.h>
64
65#include <asm/io.h>
66#include <asm/irq.h>
67#include <asm/oplib.h>
68#include <asm/system.h>
69#include <asm/kdebug.h>
70#include <asm/sbus.h>
71#include <asm/uaccess.h>
72
73#include "aurora.h"
74#include "cd180.h"
75
76unsigned char irqs[4] = {
77 0, 0, 0, 0
78};
79
80#ifdef AURORA_INT_DEBUG
81int irqhit=0;
82#endif
83
84#ifndef MIN
85#define MIN(a,b) ((a) < (b) ? (a) : (b))
86#endif
87
88static struct tty_driver *aurora_driver;
89static struct Aurora_board aurora_board[AURORA_NBOARD] = {
90 {0,},
91};
92
93static struct Aurora_port aurora_port[AURORA_TNPORTS] = {
94 { 0, },
95};
96
97/* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
98static unsigned char * tmp_buf = NULL;
99static DECLARE_MUTEX(tmp_buf_sem);
100
101DECLARE_TASK_QUEUE(tq_aurora);
102
103static inline int aurora_paranoia_check(struct Aurora_port const * port,
104 char *name, const char *routine)
105{
106#ifdef AURORA_PARANOIA_CHECK
107 static const char *badmagic =
108 KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
109 static const char *badinfo =
110 KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
111
112 if (!port) {
113 printk(badinfo, name, routine);
114 return 1;
115 }
116 if (port->magic != AURORA_MAGIC) {
117 printk(badmagic, name, routine);
118 return 1;
119 }
120#endif
121 return 0;
122}
123
124/*
125 *
126 * Service functions for aurora driver.
127 *
128 */
129
130/* Get board number from pointer */
131extern inline int board_No (struct Aurora_board const * bp)
132{
133 return bp - aurora_board;
134}
135
136/* Get port number from pointer */
137extern inline int port_No (struct Aurora_port const * port)
138{
139 return AURORA_PORT(port - aurora_port);
140}
141
142/* Get pointer to board from pointer to port */
143extern inline struct Aurora_board * port_Board(struct Aurora_port const * port)
144{
145 return &aurora_board[AURORA_BOARD(port - aurora_port)];
146}
147
148/* Wait for Channel Command Register ready */
149extern inline void aurora_wait_CCR(struct aurora_reg128 * r)
150{
151 unsigned long delay;
152
153#ifdef AURORA_DEBUG
154printk("aurora_wait_CCR\n");
155#endif
156 /* FIXME: need something more descriptive than 100000 :) */
157 for (delay = 100000; delay; delay--)
158 if (!sbus_readb(&r->r[CD180_CCR]))
159 return;
160 printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
161}
162
163/*
164 * aurora probe functions.
165 */
166
167/* Must be called with enabled interrupts */
168extern inline void aurora_long_delay(unsigned long delay)
169{
170 unsigned long i;
171
172#ifdef AURORA_DEBUG
173 printk("aurora_long_delay: start\n");
174#endif
175 for (i = jiffies + delay; time_before(jiffies, i); ) ;
176#ifdef AURORA_DEBUG
177 printk("aurora_long_delay: end\n");
178#endif
179}
180
181/* Reset and setup CD180 chip */
182static int aurora_init_CD180(struct Aurora_board * bp, int chip)
183{
184 unsigned long flags;
185 int id;
186
187#ifdef AURORA_DEBUG
188 printk("aurora_init_CD180: start %d:%d\n",
189 board_No(bp), chip);
190#endif
191 save_flags(flags); cli();
192 sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
193 sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
194
195 /* Wait for CCR ready */
196 aurora_wait_CCR(bp->r[chip]);
197
198 /* Reset CD180 chip */
199 sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
200 udelay(1);
201 sti();
202 id=1000;
203 while((--id) &&
204 (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
205 if(!id) {
206 printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
207 board_No(bp), chip);
208 restore_flags(flags);
209 return(-1);
210 }
211 cli();
212 sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
213 &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip */
214 sbus_writeb(0x80|bp->ACK_MINT,
215 &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr */
216 sbus_writeb(0x80|bp->ACK_TINT,
217 &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
218 sbus_writeb(0x80|bp->ACK_RINT,
219 &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr */
220 /* Setting up prescaler. We need 4 tick per 1 ms */
221 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
222 &bp->r[chip]->r[CD180_PPRH]);
223 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
224 &bp->r[chip]->r[CD180_PPRL]);
225
226 sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
227 &bp->r[chip]->r[CD180_SRCR]);
228
229 id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
230 printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
231 board_No(bp), chip,id);
232 if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
233 switch (id) {
234 case 0x82:printk("CL-CD1864 rev A\n");break;
235 case 0x83:printk("CL-CD1865 rev A\n");break;
236 case 0x84:printk("CL-CD1865 rev B\n");break;
237 case 0x85:printk("CL-CD1865 rev C\n");break;
238 default:printk("Unknown.\n");
239 };
240 } else {
241 switch (id) {
242 case 0x81:printk("CL-CD180 rev B\n");break;
243 case 0x82:printk("CL-CD180 rev C\n");break;
244 default:printk("Unknown.\n");
245 };
246 }
247 restore_flags(flags);
248#ifdef AURORA_DEBUG
249 printk("aurora_init_CD180: end\n");
250#endif
251 return 0;
252}
253
254static int valid_irq(unsigned char irq)
255{
256int i;
257for(i=0;i<TYPE_1_IRQS;i++)
258 if (type_1_irq[i]==irq) return 1;
259return 0;
260}
261
262static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
263
264/* Main probing routine, also sets irq. */
265static int aurora_probe(void)
266{
267 struct sbus_bus *sbus;
268 struct sbus_dev *sdev;
269 int grrr;
270 char buf[30];
271 int bn = 0;
272 struct Aurora_board *bp;
273
274 for_each_sbus(sbus) {
275 for_each_sbusdev(sdev, sbus) {
276/* printk("Try: %x %s\n",sdev,sdev->prom_name);*/
277 if (!strcmp(sdev->prom_name, "sio16")) {
278#ifdef AURORA_DEBUG
279 printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
280#endif
281 if((sdev->reg_addrs[0].reg_size!=1) &&
282 (sdev->reg_addrs[1].reg_size!=128) &&
283 (sdev->reg_addrs[2].reg_size!=128) &&
284 (sdev->reg_addrs[3].reg_size!=4)) {
285 printk(KERN_ERR "aurora%d: registers' sizes "
286 "do not match.\n", bn);
287 break;
288 }
289 bp = &aurora_board[bn];
290 bp->r0 = (struct aurora_reg1 *)
291 sbus_ioremap(&sdev->resource[0], 0,
292 sdev->reg_addrs[0].reg_size,
293 "sio16");
294 if (bp->r0 == NULL) {
295 printk(KERN_ERR "aurora%d: can't map "
296 "reg_addrs[0]\n", bn);
297 break;
298 }
299#ifdef AURORA_DEBUG
300 printk("Map reg 0: %p\n", bp->r0);
301#endif
302 bp->r[0] = (struct aurora_reg128 *)
303 sbus_ioremap(&sdev->resource[1], 0,
304 sdev->reg_addrs[1].reg_size,
305 "sio16");
306 if (bp->r[0] == NULL) {
307 printk(KERN_ERR "aurora%d: can't map "
308 "reg_addrs[1]\n", bn);
309 break;
310 }
311#ifdef AURORA_DEBUG
312 printk("Map reg 1: %p\n", bp->r[0]);
313#endif
314 bp->r[1] = (struct aurora_reg128 *)
315 sbus_ioremap(&sdev->resource[2], 0,
316 sdev->reg_addrs[2].reg_size,
317 "sio16");
318 if (bp->r[1] == NULL) {
319 printk(KERN_ERR "aurora%d: can't map "
320 "reg_addrs[2]\n", bn);
321 break;
322 }
323#ifdef AURORA_DEBUG
324 printk("Map reg 2: %p\n", bp->r[1]);
325#endif
326 bp->r3 = (struct aurora_reg4 *)
327 sbus_ioremap(&sdev->resource[3], 0,
328 sdev->reg_addrs[3].reg_size,
329 "sio16");
330 if (bp->r3 == NULL) {
331 printk(KERN_ERR "aurora%d: can't map "
332 "reg_addrs[3]\n", bn);
333 break;
334 }
335#ifdef AURORA_DEBUG
336 printk("Map reg 3: %p\n", bp->r3);
337#endif
338 /* Variables setup */
339 bp->flags = 0;
340#ifdef AURORA_DEBUG
341 grrr=prom_getint(sdev->prom_node,"intr");
342 printk("intr pri %d\n", grrr);
343#endif
344 if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
345 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
346 free_irq(bp->irq|0x30, bp);
347 } else
348 if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
349 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
350 free_irq(bp->irq|0x30, bp);
351 } else
352 if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
353 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
354 free_irq(bp->irq|0x30, bp);
355 } else
356 for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
357 if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
358 free_irq(bp->irq|0x30, bp);
359 break;
360 } else {
361 printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
362 bp->flags=0xff;
363 }
364 }
365 if(bp->flags==0xff)break;
366 printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
367 buf[0]=0;
368 grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
369 if(!strcmp(buf,"swapped")){
370 printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
371 bp->DTR=MSVR_RTS;
372 bp->RTS=MSVR_DTR;
373 bp->MSVDTR=CD180_MSVRTS;
374 bp->MSVRTS=CD180_MSVDTR;
375 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
376 }else{
377 #ifdef AURORA_FORCE_DTR_FLOW
378 printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
379 bp->DTR=MSVR_RTS;
380 bp->RTS=MSVR_DTR;
381 bp->MSVDTR=CD180_MSVRTS;
382 bp->MSVRTS=CD180_MSVDTR;
383 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
384 #else
385 printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
386 bp->DTR=MSVR_DTR;
387 bp->RTS=MSVR_RTS;
388 bp->MSVDTR=CD180_MSVDTR;
389 bp->MSVRTS=CD180_MSVRTS;
390 #endif
391 }
392 bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
393 printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
394 grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
395 printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
396 grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
397 printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
398 grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
399 printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
400 grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
401 printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
402 grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
403 printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
404 #ifdef MODULE
405 bp->count=0;
406 #endif
407 bp->flags = AURORA_BOARD_PRESENT;
408 /* hardware ack */
409 bp->ACK_MINT=1;
410 bp->ACK_TINT=2;
411 bp->ACK_RINT=3;
412 bn++;
413 }
414 }
415 }
416 return bn;
417}
418
419static void aurora_release_io_range(struct Aurora_board *bp)
420{
421 sbus_iounmap((unsigned long)bp->r0, 1);
422 sbus_iounmap((unsigned long)bp->r[0], 128);
423 sbus_iounmap((unsigned long)bp->r[1], 128);
424 sbus_iounmap((unsigned long)bp->r3, 4);
425}
426
427extern inline void aurora_mark_event(struct Aurora_port * port, int event)
428{
429#ifdef AURORA_DEBUG
430 printk("aurora_mark_event: start\n");
431#endif
432 set_bit(event, &port->event);
433 queue_task(&port->tqueue, &tq_aurora);
434 mark_bh(AURORA_BH);
435#ifdef AURORA_DEBUG
436 printk("aurora_mark_event: end\n");
437#endif
438}
439
440static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
441 int chip,
442 unsigned char const *what)
443{
444 unsigned char channel;
445 struct Aurora_port * port;
446
447 channel = ((chip << 3) |
448 ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
449 port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
450 if (port->flags & ASYNC_INITIALIZED)
451 return port;
452
453 printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
454 board_No(bp), what, channel);
455 return NULL;
456}
457
458static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
459{
460 struct Aurora_port *port;
461 struct tty_struct *tty;
462 unsigned char status;
463 unsigned char ch;
464
465 if (!(port = aurora_get_port(bp, chip, "Receive_x")))
466 return;
467
468 tty = port->tty;
469 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
470#ifdef AURORA_INTNORM
471 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
472 board_No(bp), port_No(port));
473#endif
474 return;
475 }
476
477#ifdef AURORA_REPORT_OVERRUN
478 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
479 if (status & RCSR_OE) {
480 port->overrun++;
481#if 1
482 printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
483 board_No(bp), port_No(port), port->overrun);
484#endif
485 }
486 status &= port->mark_mask;
487#else
488 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
489#endif
490 ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
491 if (!status)
492 return;
493
494 if (status & RCSR_TOUT) {
495/* printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
496 board_No(bp), port_No(port));*/
497 return;
498
499 } else if (status & RCSR_BREAK) {
500 printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
501 board_No(bp), port_No(port));
502 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
503 if (port->flags & ASYNC_SAK)
504 do_SAK(tty);
505
506 } else if (status & RCSR_PE)
507 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
508
509 else if (status & RCSR_FE)
510 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
511
512 else if (status & RCSR_OE)
513 *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
514
515 else
516 *tty->flip.flag_buf_ptr++ = 0;
517
518 *tty->flip.char_buf_ptr++ = ch;
519 tty->flip.count++;
520 queue_task(&tty->flip.tqueue, &tq_timer);
521}
522
523static void aurora_receive(struct Aurora_board const * bp, int chip)
524{
525 struct Aurora_port *port;
526 struct tty_struct *tty;
527 unsigned char count,cnt;
528
529 if (!(port = aurora_get_port(bp, chip, "Receive")))
530 return;
531
532 tty = port->tty;
533
534 count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
535
536#ifdef AURORA_REPORT_FIFO
537 port->hits[count > 8 ? 9 : count]++;
538#endif
539
540 while (count--) {
541 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
542#ifdef AURORA_INTNORM
543 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
544 board_No(bp), port_No(port));
545#endif
546 break;
547 }
548 cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
549 *tty->flip.char_buf_ptr++ = cnt;
550 *tty->flip.flag_buf_ptr++ = 0;
551 tty->flip.count++;
552 }
553 queue_task(&tty->flip.tqueue, &tq_timer);
554}
555
556static void aurora_transmit(struct Aurora_board const * bp, int chip)
557{
558 struct Aurora_port *port;
559 struct tty_struct *tty;
560 unsigned char count;
561
562 if (!(port = aurora_get_port(bp, chip, "Transmit")))
563 return;
564
565 tty = port->tty;
566
567 if (port->SRER & SRER_TXEMPTY) {
568 /* FIFO drained */
569 sbus_writeb(port_No(port) & 7,
570 &bp->r[chip]->r[CD180_CAR]);
571 udelay(1);
572 port->SRER &= ~SRER_TXEMPTY;
573 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
574 return;
575 }
576
577 if ((port->xmit_cnt <= 0 && !port->break_length)
578 || tty->stopped || tty->hw_stopped) {
579 sbus_writeb(port_No(port) & 7,
580 &bp->r[chip]->r[CD180_CAR]);
581 udelay(1);
582 port->SRER &= ~SRER_TXRDY;
583 sbus_writeb(port->SRER,
584 &bp->r[chip]->r[CD180_SRER]);
585 return;
586 }
587
588 if (port->break_length) {
589 if (port->break_length > 0) {
590 if (port->COR2 & COR2_ETC) {
591 sbus_writeb(CD180_C_ESC,
592 &bp->r[chip]->r[CD180_TDR]);
593 sbus_writeb(CD180_C_SBRK,
594 &bp->r[chip]->r[CD180_TDR]);
595 port->COR2 &= ~COR2_ETC;
596 }
597 count = MIN(port->break_length, 0xff);
598 sbus_writeb(CD180_C_ESC,
599 &bp->r[chip]->r[CD180_TDR]);
600 sbus_writeb(CD180_C_DELAY,
601 &bp->r[chip]->r[CD180_TDR]);
602 sbus_writeb(count,
603 &bp->r[chip]->r[CD180_TDR]);
604 if (!(port->break_length -= count))
605 port->break_length--;
606 } else {
607 sbus_writeb(CD180_C_ESC,
608 &bp->r[chip]->r[CD180_TDR]);
609 sbus_writeb(CD180_C_EBRK,
610 &bp->r[chip]->r[CD180_TDR]);
611 sbus_writeb(port->COR2,
612 &bp->r[chip]->r[CD180_COR2]);
613 aurora_wait_CCR(bp->r[chip]);
614 sbus_writeb(CCR_CORCHG2,
615 &bp->r[chip]->r[CD180_CCR]);
616 port->break_length = 0;
617 }
618 return;
619 }
620
621 count = CD180_NFIFO;
622 do {
623 u8 byte = port->xmit_buf[port->xmit_tail++];
624
625 sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
626 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
627 if (--port->xmit_cnt <= 0)
628 break;
629 } while (--count > 0);
630
631 if (port->xmit_cnt <= 0) {
632 sbus_writeb(port_No(port) & 7,
633 &bp->r[chip]->r[CD180_CAR]);
634 udelay(1);
635 port->SRER &= ~SRER_TXRDY;
636 sbus_writeb(port->SRER,
637 &bp->r[chip]->r[CD180_SRER]);
638 }
639 if (port->xmit_cnt <= port->wakeup_chars)
640 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
641}
642
643static void aurora_check_modem(struct Aurora_board const * bp, int chip)
644{
645 struct Aurora_port *port;
646 struct tty_struct *tty;
647 unsigned char mcr;
648
649 if (!(port = aurora_get_port(bp, chip, "Modem")))
650 return;
651
652 tty = port->tty;
653
654 mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
655 if (mcr & MCR_CDCHG) {
656 if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
657 wake_up_interruptible(&port->open_wait);
658 else
659 schedule_task(&port->tqueue_hangup);
660 }
661
662/* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope
663 * Aurora didn't made any boards with CTS or DSR broken...
664 */
665/* #ifdef AURORA_BRAIN_DAMAGED_CTS
666 if (mcr & MCR_CTSCHG) {
667 if (aurora_in(bp, CD180_MSVR) & MSVR_CTS) {
668 tty->hw_stopped = 0;
669 port->SRER |= SRER_TXRDY;
670 if (port->xmit_cnt <= port->wakeup_chars)
671 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
672 } else {
673 tty->hw_stopped = 1;
674 port->SRER &= ~SRER_TXRDY;
675 }
676 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
677 }
678 if (mcr & MCR_DSRCHG) {
679 if (aurora_in(bp, CD180_MSVR) & MSVR_DSR) {
680 tty->hw_stopped = 0;
681 port->SRER |= SRER_TXRDY;
682 if (port->xmit_cnt <= port->wakeup_chars)
683 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
684 } else {
685 tty->hw_stopped = 1;
686 port->SRER &= ~SRER_TXRDY;
687 }
688 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
689 }
690#endif AURORA_BRAIN_DAMAGED_CTS */
691
692 /* Clear change bits */
693 sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
694}
695
696/* The main interrupt processing routine */
697static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
698{
699 unsigned char status;
700 unsigned char ack,chip/*,chip_id*/;
701 struct Aurora_board * bp = (struct Aurora_board *) dev_id;
702 unsigned long loop = 0;
703
704#ifdef AURORA_INT_DEBUG
705 printk("IRQ%d %d\n",irq,++irqhit);
706#ifdef AURORA_FLOODPRO
707 if (irqhit>=AURORA_FLOODPRO)
708 sbus_writeb(8, &bp->r0->r);
709#endif
710#endif
711
712/* old bp = IRQ_to_board[irq&0x0f];*/
713
714 if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
715 return IRQ_NONE;
716
717/* The while() below takes care of this.
718 status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
719#ifdef AURORA_INT_DEBUG
720 printk("mumu: %02x\n", status);
721#endif
722 if (!(status&SRSR_ANYINT))
723 return IRQ_NONE; * Nobody has anything to say, so exit *
724*/
725 while ((loop++ < 48) &&
726 (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
727#ifdef AURORA_INT_DEBUG
728 printk("SRSR: %02x\n", status);
729#endif
730 if (status & SRSR_REXT) {
731 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
732#ifdef AURORA_INT_DEBUG
733 printk("R-ACK %02x\n", ack);
734#endif
735 if ((ack >> 5) == board_No(bp)) {
736 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
737 if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
738 aurora_receive(bp,chip);
739 sbus_writeb(0,
740 &bp->r[chip]->r[CD180_EOSRR]);
741 } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
742 aurora_receive_exc(bp,chip);
743 sbus_writeb(0,
744 &bp->r[chip]->r[CD180_EOSRR]);
745 }
746 }
747 }
748 } else if (status & SRSR_TEXT) {
749 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
750#ifdef AURORA_INT_DEBUG
751 printk("T-ACK %02x\n", ack);
752#endif
753 if ((ack >> 5) == board_No(bp)) {
754 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
755 if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
756 aurora_transmit(bp,chip);
757 sbus_writeb(0,
758 &bp->r[chip]->r[CD180_EOSRR]);
759 }
760 }
761 }
762 } else if (status & SRSR_MEXT) {
763 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
764#ifdef AURORA_INT_DEBUG
765 printk("M-ACK %02x\n", ack);
766#endif
767 if ((ack >> 5) == board_No(bp)) {
768 if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
769 if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
770 aurora_check_modem(bp,chip);
771 sbus_writeb(0,
772 &bp->r[chip]->r[CD180_EOSRR]);
773 }
774 }
775 }
776 }
777 }
778/* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
779#if 0
780 while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
781#ifdef AURORA_INT_DEBUG
782 printk("SRSR: %02x\n",status);
783#endif
784 ack = sbus_readb(&bp->r3->r[0]);
785#ifdef AURORA_INT_DEBUG
786 printk("ACK: %02x\n",ack);
787#endif
788 if ((ack>>5)==board_No(bp)) {
789 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
790 ack&=GSVR_ITMASK;
791 if (ack==GSVR_IT_RGD) {
792 aurora_receive(bp,chip);
793 sbus_writeb(0,
794 &bp->r[chip]->r[CD180_EOSRR]);
795 } else if (ack==GSVR_IT_REXC) {
796 aurora_receive_exc(bp,chip);
797 sbus_writeb(0,
798 &bp->r[chip]->r[CD180_EOSRR]);
799 } else if (ack==GSVR_IT_TX) {
800 aurora_transmit(bp,chip);
801 sbus_writeb(0,
802 &bp->r[chip]->r[CD180_EOSRR]);
803 } else if (ack==GSVR_IT_MDM) {
804 aurora_check_modem(bp,chip);
805 sbus_writeb(0,
806 &bp->r[chip]->r[CD180_EOSRR]);
807 }
808 }
809 }
810 }
811#endif
812
813/* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
814#if 0
815 for(chip=0;chip<AURORA_NCD180;chip++){
816 chip_id=(board_No(bp)<<5)|((chip+1)<<3);
817 loop=0;
818 while ((loop++ < 1) &&
819 ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
820 (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
821
822 if (status & SRSR_REXT) {
823 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
824 if (ack == (chip_id | GSVR_IT_RGD)) {
825#ifdef AURORA_INTMSG
826 printk("RX ACK\n");
827#endif
828 aurora_receive(bp,chip);
829 } else if (ack == (chip_id | GSVR_IT_REXC)) {
830#ifdef AURORA_INTMSG
831 printk("RXC ACK\n");
832#endif
833 aurora_receive_exc(bp,chip);
834 } else {
835#ifdef AURORA_INTNORM
836 printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
837 board_No(bp), chip, ack);
838#endif
839 }
840 } else if (status & SRSR_TEXT) {
841 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
842 if (ack == (chip_id | GSVR_IT_TX)){
843#ifdef AURORA_INTMSG
844 printk("TX ACK\n");
845#endif
846 aurora_transmit(bp,chip);
847 } else {
848#ifdef AURORA_INTNORM
849 printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
850 board_No(bp), chip, ack);
851#endif
852 }
853 } else if (status & SRSR_MEXT) {
854 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
855 if (ack == (chip_id | GSVR_IT_MDM)){
856#ifdef AURORA_INTMSG
857 printk("MDM ACK\n");
858#endif
859 aurora_check_modem(bp,chip);
860 } else {
861#ifdef AURORA_INTNORM
862 printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
863 board_No(bp), chip, ack);
864#endif
865 }
866 }
867 sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
868 }
869 }
870#endif
871
872 return IRQ_HANDLED;
873}
874
875#ifdef AURORA_INT_DEBUG
876static void aurora_timer (unsigned long ignored);
877
878static struct timer_list aurora_poll_timer =
879 TIMER_INITIALIZER(aurora_timer, 0, 0);
880
881static void
882aurora_timer (unsigned long ignored)
883{
884 unsigned long flags;
885 int i;
886
887 save_flags(flags); cli();
888
889 printk("SRSR: %02x,%02x - ",
890 sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
891 sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
892 for (i = 0; i < 4; i++) {
893 udelay(1);
894 printk("%02x ",
895 sbus_readb(&aurora_board[0].r3->r[i]));
896 }
897 printk("\n");
898
899 aurora_poll_timer.expires = jiffies + 300;
900 add_timer (&aurora_poll_timer);
901
902 restore_flags(flags);
903}
904#endif
905
906/*
907 * Routines for open & close processing.
908 */
909
910/* Called with disabled interrupts */
911static int aurora_setup_board(struct Aurora_board * bp)
912{
913 int error;
914
915#ifdef AURORA_ALLIRQ
916 int i;
917 for (i = 0; i < AURORA_ALLIRQ; i++) {
918 error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ,
919 "sio16", bp);
920 if (error)
921 printk(KERN_ERR "IRQ%d request error %d\n",
922 allirq[i], error);
923 }
924#else
925 error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ,
926 "sio16", bp);
927 if (error) {
928 printk(KERN_ERR "IRQ request error %d\n", error);
929 return error;
930 }
931#endif
932 /* Board reset */
933 sbus_writeb(0, &bp->r0->r);
934 udelay(1);
935 if (bp->flags & AURORA_BOARD_TYPE_2) {
936 /* unknown yet */
937 } else {
938 sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
939 (((bp->irq)&0x0f)>>2)),
940 &bp->r0->r);
941 }
942 udelay(10000);
943
944 if (aurora_init_CD180(bp,0))error=1;error=0;
945 if (aurora_init_CD180(bp,1))error++;
946 if (error == AURORA_NCD180) {
947 printk(KERN_ERR "Both chips failed initialisation.\n");
948 return -EIO;
949 }
950
951#ifdef AURORA_INT_DEBUG
952 aurora_poll_timer.expires= jiffies + 1;
953 add_timer(&aurora_poll_timer);
954#endif
955#ifdef AURORA_DEBUG
956 printk("aurora_setup_board: end\n");
957#endif
958 return 0;
959}
960
961/* Called with disabled interrupts */
962static void aurora_shutdown_board(struct Aurora_board *bp)
963{
964 int i;
965
966#ifdef AURORA_DEBUG
967 printk("aurora_shutdown_board: start\n");
968#endif
969
970#ifdef AURORA_INT_DEBUG
971 del_timer(&aurora_poll_timer);
972#endif
973
974#ifdef AURORA_ALLIRQ
975 for(i=0;i<AURORA_ALLIRQ;i++){
976 free_irq(allirq[i]|0x30, bp);
977/* IRQ_to_board[allirq[i]&0xf] = NULL;*/
978 }
979#else
980 free_irq(bp->irq|0x30, bp);
981/* IRQ_to_board[bp->irq&0xf] = NULL;*/
982#endif
983 /* Drop all DTR's */
984 for(i=0;i<16;i++){
985 sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
986 udelay(1);
987 sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
988 udelay(1);
989 }
990 /* Board shutdown */
991 sbus_writeb(0, &bp->r0->r);
992
993#ifdef AURORA_DEBUG
994 printk("aurora_shutdown_board: end\n");
995#endif
996}
997
998/* Setting up port characteristics.
999 * Must be called with disabled interrupts
1000 */
1001static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
1002{
1003 struct tty_struct *tty;
1004 unsigned long baud;
1005 long tmp;
1006 unsigned char cor1 = 0, cor3 = 0;
1007 unsigned char mcor1 = 0, mcor2 = 0,chip;
1008
1009#ifdef AURORA_DEBUG
1010 printk("aurora_change_speed: start\n");
1011#endif
1012 if (!(tty = port->tty) || !tty->termios)
1013 return;
1014
1015 chip = AURORA_CD180(port_No(port));
1016
1017 port->SRER = 0;
1018 port->COR2 = 0;
1019 port->MSVR = MSVR_RTS|MSVR_DTR;
1020
1021 baud = tty_get_baud_rate(tty);
1022
1023 /* Select port on the board */
1024 sbus_writeb(port_No(port) & 7,
1025 &bp->r[chip]->r[CD180_CAR]);
1026 udelay(1);
1027
1028 if (!baud) {
1029 /* Drop DTR & exit */
1030 port->MSVR &= ~(bp->DTR|bp->RTS);
1031 sbus_writeb(port->MSVR,
1032 &bp->r[chip]->r[CD180_MSVR]);
1033 return;
1034 } else {
1035 /* Set DTR on */
1036 port->MSVR |= bp->DTR;
1037 sbus_writeb(port->MSVR,
1038 &bp->r[chip]->r[CD180_MSVR]);
1039 }
1040
1041 /* Now we must calculate some speed dependent things. */
1042
1043 /* Set baud rate for port. */
1044 tmp = (((bp->oscfreq + baud/2) / baud +
1045 CD180_TPC/2) / CD180_TPC);
1046
1047/* tmp = (bp->oscfreq/7)/baud;
1048 if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
1049/* printk("Prescaler period: %d\n",tmp);*/
1050
1051 sbus_writeb((tmp >> 8) & 0xff,
1052 &bp->r[chip]->r[CD180_RBPRH]);
1053 sbus_writeb((tmp >> 8) & 0xff,
1054 &bp->r[chip]->r[CD180_TBPRH]);
1055 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
1056 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
1057
1058 baud = (baud + 5) / 10; /* Estimated CPS */
1059
1060 /* Two timer ticks seems enough to wakeup something like SLIP driver */
1061 tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
1062 port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1063 SERIAL_XMIT_SIZE - 1 : tmp);
1064
1065 /* Receiver timeout will be transmission time for 1.5 chars */
1066 tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
1067 tmp = (tmp > 0xff) ? 0xff : tmp;
1068 sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
1069
1070 switch (C_CSIZE(tty)) {
1071 case CS5:
1072 cor1 |= COR1_5BITS;
1073 break;
1074 case CS6:
1075 cor1 |= COR1_6BITS;
1076 break;
1077 case CS7:
1078 cor1 |= COR1_7BITS;
1079 break;
1080 case CS8:
1081 cor1 |= COR1_8BITS;
1082 break;
1083 }
1084
1085 if (C_CSTOPB(tty))
1086 cor1 |= COR1_2SB;
1087
1088 cor1 |= COR1_IGNORE;
1089 if (C_PARENB(tty)) {
1090 cor1 |= COR1_NORMPAR;
1091 if (C_PARODD(tty))
1092 cor1 |= COR1_ODDP;
1093 if (I_INPCK(tty))
1094 cor1 &= ~COR1_IGNORE;
1095 }
1096 /* Set marking of some errors */
1097 port->mark_mask = RCSR_OE | RCSR_TOUT;
1098 if (I_INPCK(tty))
1099 port->mark_mask |= RCSR_FE | RCSR_PE;
1100 if (I_BRKINT(tty) || I_PARMRK(tty))
1101 port->mark_mask |= RCSR_BREAK;
1102 if (I_IGNPAR(tty))
1103 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1104 if (I_IGNBRK(tty)) {
1105 port->mark_mask &= ~RCSR_BREAK;
1106 if (I_IGNPAR(tty))
1107 /* Real raw mode. Ignore all */
1108 port->mark_mask &= ~RCSR_OE;
1109 }
1110 /* Enable Hardware Flow Control */
1111 if (C_CRTSCTS(tty)) {
1112/*#ifdef AURORA_BRAIN_DAMAGED_CTS
1113 port->SRER |= SRER_DSR | SRER_CTS;
1114 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1115 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1116 tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
1117#else*/
1118 port->COR2 |= COR2_CTSAE;
1119/*#endif*/
1120 if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
1121 mcor1 |= AURORA_RXTH;
1122 }
1123 }
1124 /* Enable Software Flow Control. FIXME: I'm not sure about this */
1125 /* Some people reported that it works, but I still doubt */
1126 if (I_IXON(tty)) {
1127 port->COR2 |= COR2_TXIBE;
1128 cor3 |= (COR3_FCT | COR3_SCDE);
1129 if (I_IXANY(tty))
1130 port->COR2 |= COR2_IXM;
1131 sbus_writeb(START_CHAR(tty),
1132 &bp->r[chip]->r[CD180_SCHR1]);
1133 sbus_writeb(STOP_CHAR(tty),
1134 &bp->r[chip]->r[CD180_SCHR2]);
1135 sbus_writeb(START_CHAR(tty),
1136 &bp->r[chip]->r[CD180_SCHR3]);
1137 sbus_writeb(STOP_CHAR(tty),
1138 &bp->r[chip]->r[CD180_SCHR4]);
1139 }
1140 if (!C_CLOCAL(tty)) {
1141 /* Enable CD check */
1142 port->SRER |= SRER_CD;
1143 mcor1 |= MCOR1_CDZD;
1144 mcor2 |= MCOR2_CDOD;
1145 }
1146
1147 if (C_CREAD(tty))
1148 /* Enable receiver */
1149 port->SRER |= SRER_RXD;
1150
1151 /* Set input FIFO size (1-8 bytes) */
1152 cor3 |= AURORA_RXFIFO;
1153 /* Setting up CD180 channel registers */
1154 sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
1155 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1156 sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
1157 /* Make CD180 know about registers change */
1158 aurora_wait_CCR(bp->r[chip]);
1159 sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
1160 &bp->r[chip]->r[CD180_CCR]);
1161 /* Setting up modem option registers */
1162 sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
1163 sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
1164 /* Enable CD180 transmitter & receiver */
1165 aurora_wait_CCR(bp->r[chip]);
1166 sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
1167 /* Enable interrupts */
1168 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1169 /* And finally set RTS on */
1170 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1171#ifdef AURORA_DEBUG
1172 printk("aurora_change_speed: end\n");
1173#endif
1174}
1175
1176/* Must be called with interrupts enabled */
1177static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
1178{
1179 unsigned long flags;
1180
1181#ifdef AURORA_DEBUG
1182 printk("aurora_setup_port: start %d\n",port_No(port));
1183#endif
1184 if (port->flags & ASYNC_INITIALIZED)
1185 return 0;
1186
1187 if (!port->xmit_buf) {
1188 /* We may sleep in get_zeroed_page() */
1189 unsigned long tmp;
1190
1191 if (!(tmp = get_zeroed_page(GFP_KERNEL)))
1192 return -ENOMEM;
1193
1194 if (port->xmit_buf) {
1195 free_page(tmp);
1196 return -ERESTARTSYS;
1197 }
1198 port->xmit_buf = (unsigned char *) tmp;
1199 }
1200
1201 save_flags(flags); cli();
1202
1203 if (port->tty)
1204 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1205
1206#ifdef MODULE
1207 if ((port->count == 1) && ((++bp->count) == 1))
1208 bp->flags |= AURORA_BOARD_ACTIVE;
1209#endif
1210
1211 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1212 aurora_change_speed(bp, port);
1213 port->flags |= ASYNC_INITIALIZED;
1214
1215 restore_flags(flags);
1216#ifdef AURORA_DEBUG
1217 printk("aurora_setup_port: end\n");
1218#endif
1219 return 0;
1220}
1221
1222/* Must be called with interrupts disabled */
1223static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
1224{
1225 struct tty_struct *tty;
1226 unsigned char chip;
1227
1228#ifdef AURORA_DEBUG
1229 printk("aurora_shutdown_port: start\n");
1230#endif
1231 if (!(port->flags & ASYNC_INITIALIZED))
1232 return;
1233
1234 chip = AURORA_CD180(port_No(port));
1235
1236#ifdef AURORA_REPORT_OVERRUN
1237 printk("aurora%d: port %d: Total %ld overruns were detected.\n",
1238 board_No(bp), port_No(port), port->overrun);
1239#endif
1240#ifdef AURORA_REPORT_FIFO
1241 {
1242 int i;
1243
1244 printk("aurora%d: port %d: FIFO hits [ ",
1245 board_No(bp), port_No(port));
1246 for (i = 0; i < 10; i++) {
1247 printk("%ld ", port->hits[i]);
1248 }
1249 printk("].\n");
1250 }
1251#endif
1252 if (port->xmit_buf) {
1253 free_page((unsigned long) port->xmit_buf);
1254 port->xmit_buf = NULL;
1255 }
1256
1257 if (!(tty = port->tty) || C_HUPCL(tty)) {
1258 /* Drop DTR */
1259 port->MSVR &= ~(bp->DTR|bp->RTS);
1260 sbus_writeb(port->MSVR,
1261 &bp->r[chip]->r[CD180_MSVR]);
1262 }
1263
1264 /* Select port */
1265 sbus_writeb(port_No(port) & 7,
1266 &bp->r[chip]->r[CD180_CAR]);
1267 udelay(1);
1268
1269 /* Reset port */
1270 aurora_wait_CCR(bp->r[chip]);
1271 sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
1272
1273 /* Disable all interrupts from this port */
1274 port->SRER = 0;
1275 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1276
1277 if (tty)
1278 set_bit(TTY_IO_ERROR, &tty->flags);
1279 port->flags &= ~ASYNC_INITIALIZED;
1280
1281#ifdef MODULE
1282 if (--bp->count < 0) {
1283 printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
1284 "bad board count: %d\n",
1285 board_No(bp), bp->count);
1286 bp->count = 0;
1287 }
1288
1289 if (!bp->count)
1290 bp->flags &= ~AURORA_BOARD_ACTIVE;
1291#endif
1292
1293#ifdef AURORA_DEBUG
1294 printk("aurora_shutdown_port: end\n");
1295#endif
1296}
1297
1298
1299static int block_til_ready(struct tty_struct *tty, struct file * filp,
1300 struct Aurora_port *port)
1301{
1302 DECLARE_WAITQUEUE(wait, current);
1303 struct Aurora_board *bp = port_Board(port);
1304 int retval;
1305 int do_clocal = 0;
1306 int CD;
1307 unsigned char chip;
1308
1309#ifdef AURORA_DEBUG
1310 printk("block_til_ready: start\n");
1311#endif
1312 chip = AURORA_CD180(port_No(port));
1313
1314 /* If the device is in the middle of being closed, then block
1315 * until it's done, and then try again.
1316 */
1317 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
1318 interruptible_sleep_on(&port->close_wait);
1319 if (port->flags & ASYNC_HUP_NOTIFY)
1320 return -EAGAIN;
1321 else
1322 return -ERESTARTSYS;
1323 }
1324
1325 /* If non-blocking mode is set, or the port is not enabled,
1326 * then make the check up front and then exit.
1327 */
1328 if ((filp->f_flags & O_NONBLOCK) ||
1329 (tty->flags & (1 << TTY_IO_ERROR))) {
1330 port->flags |= ASYNC_NORMAL_ACTIVE;
1331 return 0;
1332 }
1333
1334 if (C_CLOCAL(tty))
1335 do_clocal = 1;
1336
1337 /* Block waiting for the carrier detect and the line to become
1338 * free (i.e., not in use by the callout). While we are in
1339 * this loop, info->count is dropped by one, so that
1340 * rs_close() knows when to free things. We restore it upon
1341 * exit, either normal or abnormal.
1342 */
1343 retval = 0;
1344 add_wait_queue(&port->open_wait, &wait);
1345 cli();
1346 if (!tty_hung_up_p(filp))
1347 port->count--;
1348 sti();
1349 port->blocked_open++;
1350 while (1) {
1351 cli();
1352 sbus_writeb(port_No(port) & 7,
1353 &bp->r[chip]->r[CD180_CAR]);
1354 udelay(1);
1355 CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
1356 port->MSVR=bp->RTS;
1357
1358 /* auto drops DTR */
1359 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1360 sti();
1361 set_current_state(TASK_INTERRUPTIBLE);
1362 if (tty_hung_up_p(filp) ||
1363 !(port->flags & ASYNC_INITIALIZED)) {
1364 if (port->flags & ASYNC_HUP_NOTIFY)
1365 retval = -EAGAIN;
1366 else
1367 retval = -ERESTARTSYS;
1368 break;
1369 }
1370 if (!(port->flags & ASYNC_CLOSING) &&
1371 (do_clocal || CD))
1372 break;
1373 if (signal_pending(current)) {
1374 retval = -ERESTARTSYS;
1375 break;
1376 }
1377 schedule();
1378 }
1379 current->state = TASK_RUNNING;
1380 remove_wait_queue(&port->open_wait, &wait);
1381 if (!tty_hung_up_p(filp))
1382 port->count++;
1383 port->blocked_open--;
1384 if (retval)
1385 return retval;
1386
1387 port->flags |= ASYNC_NORMAL_ACTIVE;
1388#ifdef AURORA_DEBUG
1389 printk("block_til_ready: end\n");
1390#endif
1391 return 0;
1392}
1393
1394static int aurora_open(struct tty_struct * tty, struct file * filp)
1395{
1396 int board;
1397 int error;
1398 struct Aurora_port * port;
1399 struct Aurora_board * bp;
1400 unsigned long flags;
1401
1402#ifdef AURORA_DEBUG
1403 printk("aurora_open: start\n");
1404#endif
1405
1406 board = AURORA_BOARD(tty->index);
1407 if (board > AURORA_NBOARD ||
1408 !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
1409#ifdef AURORA_DEBUG
1410 printk("aurora_open: error board %d present %d\n",
1411 board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
1412#endif
1413 return -ENODEV;
1414 }
1415
1416 bp = &aurora_board[board];
1417 port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
1418 if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
1419#ifdef AURORA_DEBUG
1420 printk("aurora_open: error paranoia check\n");
1421#endif
1422 return -ENODEV;
1423 }
1424
1425 port->count++;
1426 tty->driver_data = port;
1427 port->tty = tty;
1428
1429 if ((error = aurora_setup_port(bp, port))) {
1430#ifdef AURORA_DEBUG
1431 printk("aurora_open: error aurora_setup_port ret %d\n",error);
1432#endif
1433 return error;
1434 }
1435
1436 if ((error = block_til_ready(tty, filp, port))) {
1437#ifdef AURORA_DEBUG
1438 printk("aurora_open: error block_til_ready ret %d\n",error);
1439#endif
1440 return error;
1441 }
1442
1443#ifdef AURORA_DEBUG
1444 printk("aurora_open: end\n");
1445#endif
1446 return 0;
1447}
1448
1449static void aurora_close(struct tty_struct * tty, struct file * filp)
1450{
1451 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1452 struct Aurora_board *bp;
1453 unsigned long flags;
1454 unsigned long timeout;
1455 unsigned char chip;
1456
1457#ifdef AURORA_DEBUG
1458 printk("aurora_close: start\n");
1459#endif
1460
1461 if (!port || (aurora_paranoia_check(port, tty->name, "close"))
1462 return;
1463
1464 chip = AURORA_CD180(port_No(port));
1465
1466 save_flags(flags); cli();
1467 if (tty_hung_up_p(filp)) {
1468 restore_flags(flags);
1469 return;
1470 }
1471
1472 bp = port_Board(port);
1473 if ((tty->count == 1) && (port->count != 1)) {
1474 printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
1475 "tty->count is 1, port count is %d\n",
1476 board_No(bp), port->count);
1477 port->count = 1;
1478 }
1479 if (--port->count < 0) {
1480 printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
1481 "count for tty%d: %d\n",
1482 board_No(bp), port_No(port), port->count);
1483 port->count = 0;
1484 }
1485 if (port->count) {
1486 restore_flags(flags);
1487 return;
1488 }
1489 port->flags |= ASYNC_CLOSING;
1490
1491 /* Now we wait for the transmit buffer to clear; and we notify
1492 * the line discipline to only process XON/XOFF characters.
1493 */
1494 tty->closing = 1;
1495 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
1496#ifdef AURORA_DEBUG
1497 printk("aurora_close: waiting to flush...\n");
1498#endif
1499 tty_wait_until_sent(tty, port->closing_wait);
1500 }
1501
1502 /* At this point we stop accepting input. To do this, we
1503 * disable the receive line status interrupts, and tell the
1504 * interrupt driver to stop checking the data ready bit in the
1505 * line status register.
1506 */
1507 port->SRER &= ~SRER_RXD;
1508 if (port->flags & ASYNC_INITIALIZED) {
1509 port->SRER &= ~SRER_TXRDY;
1510 port->SRER |= SRER_TXEMPTY;
1511 sbus_writeb(port_No(port) & 7,
1512 &bp->r[chip]->r[CD180_CAR]);
1513 udelay(1);
1514 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1515 /*
1516 * Before we drop DTR, make sure the UART transmitter
1517 * has completely drained; this is especially
1518 * important if there is a transmit FIFO!
1519 */
1520 timeout = jiffies+HZ;
1521 while(port->SRER & SRER_TXEMPTY) {
1522 current->state = TASK_INTERRUPTIBLE;
1523 schedule_timeout(port->timeout);
1524 if (time_after(jiffies, timeout))
1525 break;
1526 }
1527 }
1528#ifdef AURORA_DEBUG
1529 printk("aurora_close: shutdown_port\n");
1530#endif
1531 aurora_shutdown_port(bp, port);
1532 if (tty->driver->flush_buffer)
1533 tty->driver->flush_buffer(tty);
1534 tty_ldisc_flush(tty);
1535 tty->closing = 0;
1536 port->event = 0;
1537 port->tty = 0;
1538 if (port->blocked_open) {
1539 if (port->close_delay) {
1540 current->state = TASK_INTERRUPTIBLE;
1541 schedule_timeout(port->close_delay);
1542 }
1543 wake_up_interruptible(&port->open_wait);
1544 }
1545 port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1546 wake_up_interruptible(&port->close_wait);
1547 restore_flags(flags);
1548#ifdef AURORA_DEBUG
1549 printk("aurora_close: end\n");
1550#endif
1551}
1552
1553static int aurora_write(struct tty_struct * tty,
1554 const unsigned char *buf, int count)
1555{
1556 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1557 struct Aurora_board *bp;
1558 int c, total = 0;
1559 unsigned long flags;
1560 unsigned char chip;
1561
1562#ifdef AURORA_DEBUG
1563 printk("aurora_write: start %d\n",count);
1564#endif
1565 if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
1566 return 0;
1567
1568 chip = AURORA_CD180(port_No(port));
1569
1570 bp = port_Board(port);
1571
1572 if (!tty || !port->xmit_buf || !tmp_buf)
1573 return 0;
1574
1575 save_flags(flags);
1576 while (1) {
1577 cli();
1578 c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1579 SERIAL_XMIT_SIZE - port->xmit_head));
1580 if (c <= 0) {
1581 restore_flags(flags);
1582 break;
1583 }
1584 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1585 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1586 port->xmit_cnt += c;
1587 restore_flags(flags);
1588
1589 buf += c;
1590 count -= c;
1591 total += c;
1592 }
1593
1594 cli();
1595 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1596 !(port->SRER & SRER_TXRDY)) {
1597 port->SRER |= SRER_TXRDY;
1598 sbus_writeb(port_No(port) & 7,
1599 &bp->r[chip]->r[CD180_CAR]);
1600 udelay(1);
1601 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1602 }
1603 restore_flags(flags);
1604#ifdef AURORA_DEBUG
1605 printk("aurora_write: end %d\n",total);
1606#endif
1607 return total;
1608}
1609
1610static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
1611{
1612 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1613 unsigned long flags;
1614
1615#ifdef AURORA_DEBUG
1616 printk("aurora_put_char: start %c\n",ch);
1617#endif
1618 if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
1619 return;
1620
1621 if (!tty || !port->xmit_buf)
1622 return;
1623
1624 save_flags(flags); cli();
1625
1626 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1627 restore_flags(flags);
1628 return;
1629 }
1630
1631 port->xmit_buf[port->xmit_head++] = ch;
1632 port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1633 port->xmit_cnt++;
1634 restore_flags(flags);
1635#ifdef AURORA_DEBUG
1636 printk("aurora_put_char: end\n");
1637#endif
1638}
1639
1640static void aurora_flush_chars(struct tty_struct * tty)
1641{
1642 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1643 unsigned long flags;
1644 unsigned char chip;
1645
1646/*#ifdef AURORA_DEBUG
1647 printk("aurora_flush_chars: start\n");
1648#endif*/
1649 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
1650 return;
1651
1652 chip = AURORA_CD180(port_No(port));
1653
1654 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1655 !port->xmit_buf)
1656 return;
1657
1658 save_flags(flags); cli();
1659 port->SRER |= SRER_TXRDY;
1660 sbus_writeb(port_No(port) & 7,
1661 &port_Board(port)->r[chip]->r[CD180_CAR]);
1662 udelay(1);
1663 sbus_writeb(port->SRER,
1664 &port_Board(port)->r[chip]->r[CD180_SRER]);
1665 restore_flags(flags);
1666/*#ifdef AURORA_DEBUG
1667 printk("aurora_flush_chars: end\n");
1668#endif*/
1669}
1670
1671static int aurora_write_room(struct tty_struct * tty)
1672{
1673 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1674 int ret;
1675
1676#ifdef AURORA_DEBUG
1677 printk("aurora_write_room: start\n");
1678#endif
1679 if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
1680 return 0;
1681
1682 ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1683 if (ret < 0)
1684 ret = 0;
1685#ifdef AURORA_DEBUG
1686 printk("aurora_write_room: end\n");
1687#endif
1688 return ret;
1689}
1690
1691static int aurora_chars_in_buffer(struct tty_struct *tty)
1692{
1693 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1694
1695 if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
1696 return 0;
1697
1698 return port->xmit_cnt;
1699}
1700
1701static void aurora_flush_buffer(struct tty_struct *tty)
1702{
1703 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1704 unsigned long flags;
1705
1706#ifdef AURORA_DEBUG
1707 printk("aurora_flush_buffer: start\n");
1708#endif
1709 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
1710 return;
1711
1712 save_flags(flags); cli();
1713 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1714 restore_flags(flags);
1715
1716 tty_wakeup(tty);
1717#ifdef AURORA_DEBUG
1718 printk("aurora_flush_buffer: end\n");
1719#endif
1720}
1721
1722static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
1723{
1724 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1725 struct Aurora_board * bp;
1726 unsigned char status,chip;
1727 unsigned int result;
1728 unsigned long flags;
1729
1730#ifdef AURORA_DEBUG
1731 printk("aurora_get_modem_info: start\n");
1732#endif
1733 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1734 return -ENODEV;
1735
1736 chip = AURORA_CD180(port_No(port));
1737
1738 bp = port_Board(port);
1739
1740 save_flags(flags); cli();
1741
1742 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1743 udelay(1);
1744
1745 status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
1746 result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
1747
1748 restore_flags(flags);
1749
1750 result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
1751 | ((status & bp->DTR) ? TIOCM_DTR : 0)
1752 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1753 | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
1754 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1755
1756#ifdef AURORA_DEBUG
1757 printk("aurora_get_modem_info: end\n");
1758#endif
1759 return result;
1760}
1761
1762static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
1763 unsigned int set, unsigned int clear)
1764{
1765 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1766 unsigned int arg;
1767 unsigned long flags;
1768 struct Aurora_board *bp = port_Board(port);
1769 unsigned char chip;
1770
1771#ifdef AURORA_DEBUG
1772 printk("aurora_set_modem_info: start\n");
1773#endif
1774 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1775 return -ENODEV;
1776
1777 chip = AURORA_CD180(port_No(port));
1778
1779 save_flags(flags); cli();
1780 if (set & TIOCM_RTS)
1781 port->MSVR |= bp->RTS;
1782 if (set & TIOCM_DTR)
1783 port->MSVR |= bp->DTR;
1784 if (clear & TIOCM_RTS)
1785 port->MSVR &= ~bp->RTS;
1786 if (clear & TIOCM_DTR)
1787 port->MSVR &= ~bp->DTR;
1788
1789 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1790 udelay(1);
1791
1792 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1793
1794 restore_flags(flags);
1795#ifdef AURORA_DEBUG
1796 printk("aurora_set_modem_info: end\n");
1797#endif
1798 return 0;
1799}
1800
1801static void aurora_send_break(struct Aurora_port * port, unsigned long length)
1802{
1803 struct Aurora_board *bp = port_Board(port);
1804 unsigned long flags;
1805 unsigned char chip;
1806
1807#ifdef AURORA_DEBUG
1808 printk("aurora_send_break: start\n");
1809#endif
1810 chip = AURORA_CD180(port_No(port));
1811
1812 save_flags(flags); cli();
1813
1814 port->break_length = AURORA_TPS / HZ * length;
1815 port->COR2 |= COR2_ETC;
1816 port->SRER |= SRER_TXRDY;
1817 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1818 udelay(1);
1819
1820 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1821 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1822 aurora_wait_CCR(bp->r[chip]);
1823
1824 sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
1825 aurora_wait_CCR(bp->r[chip]);
1826
1827 restore_flags(flags);
1828#ifdef AURORA_DEBUG
1829 printk("aurora_send_break: end\n");
1830#endif
1831}
1832
1833static int aurora_set_serial_info(struct Aurora_port * port,
1834 struct serial_struct * newinfo)
1835{
1836 struct serial_struct tmp;
1837 struct Aurora_board *bp = port_Board(port);
1838 int change_speed;
1839 unsigned long flags;
1840
1841#ifdef AURORA_DEBUG
1842 printk("aurora_set_serial_info: start\n");
1843#endif
1844 if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
1845 return -EFAULT;
1846#if 0
1847 if ((tmp.irq != bp->irq) ||
1848 (tmp.port != bp->base) ||
1849 (tmp.type != PORT_CIRRUS) ||
1850 (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
1851 (tmp.custom_divisor != 0) ||
1852 (tmp.xmit_fifo_size != CD180_NFIFO) ||
1853 (tmp.flags & ~AURORA_LEGAL_FLAGS))
1854 return -EINVAL;
1855#endif
1856
1857 change_speed = ((port->flags & ASYNC_SPD_MASK) !=
1858 (tmp.flags & ASYNC_SPD_MASK));
1859
1860 if (!capable(CAP_SYS_ADMIN)) {
1861 if ((tmp.close_delay != port->close_delay) ||
1862 (tmp.closing_wait != port->closing_wait) ||
1863 ((tmp.flags & ~ASYNC_USR_MASK) !=
1864 (port->flags & ~ASYNC_USR_MASK)))
1865 return -EPERM;
1866 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1867 (tmp.flags & ASYNC_USR_MASK));
1868 } else {
1869 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1870 (tmp.flags & ASYNC_FLAGS));
1871 port->close_delay = tmp.close_delay;
1872 port->closing_wait = tmp.closing_wait;
1873 }
1874 if (change_speed) {
1875 save_flags(flags); cli();
1876 aurora_change_speed(bp, port);
1877 restore_flags(flags);
1878 }
1879#ifdef AURORA_DEBUG
1880 printk("aurora_set_serial_info: end\n");
1881#endif
1882 return 0;
1883}
1884
1885extern int aurora_get_serial_info(struct Aurora_port * port,
1886 struct serial_struct * retinfo)
1887{
1888 struct serial_struct tmp;
1889 struct Aurora_board *bp = port_Board(port);
1890
1891#ifdef AURORA_DEBUG
1892 printk("aurora_get_serial_info: start\n");
1893#endif
1894 if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
1895 return -EFAULT;
1896
1897 memset(&tmp, 0, sizeof(tmp));
1898 tmp.type = PORT_CIRRUS;
1899 tmp.line = port - aurora_port;
1900 tmp.port = 0;
1901 tmp.irq = bp->irq;
1902 tmp.flags = port->flags;
1903 tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
1904 tmp.close_delay = port->close_delay * HZ/100;
1905 tmp.closing_wait = port->closing_wait * HZ/100;
1906 tmp.xmit_fifo_size = CD180_NFIFO;
1907 copy_to_user(retinfo, &tmp, sizeof(tmp));
1908#ifdef AURORA_DEBUG
1909printk("aurora_get_serial_info: end\n");
1910#endif
1911 return 0;
1912}
1913
1914static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
1915 unsigned int cmd, unsigned long arg)
1916
1917{
1918 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1919 int retval;
1920
1921#ifdef AURORA_DEBUG
1922 printk("aurora_ioctl: start\n");
1923#endif
1924 if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
1925 return -ENODEV;
1926
1927 switch (cmd) {
1928 case TCSBRK: /* SVID version: non-zero arg --> no break */
1929 retval = tty_check_change(tty);
1930 if (retval)
1931 return retval;
1932 tty_wait_until_sent(tty, 0);
1933 if (!arg)
1934 aurora_send_break(port, HZ/4); /* 1/4 second */
1935 return 0;
1936 case TCSBRKP: /* support for POSIX tcsendbreak() */
1937 retval = tty_check_change(tty);
1938 if (retval)
1939 return retval;
1940 tty_wait_until_sent(tty, 0);
1941 aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
1942 return 0;
1943 case TIOCGSOFTCAR:
1944 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
1945 case TIOCSSOFTCAR:
1946 if (get_user(arg,(unsigned long *)arg))
1947 return -EFAULT;
1948 tty->termios->c_cflag =
1949 ((tty->termios->c_cflag & ~CLOCAL) |
1950 (arg ? CLOCAL : 0));
1951 return 0;
1952 case TIOCGSERIAL:
1953 return aurora_get_serial_info(port, (struct serial_struct *) arg);
1954 case TIOCSSERIAL:
1955 return aurora_set_serial_info(port, (struct serial_struct *) arg);
1956 default:
1957 return -ENOIOCTLCMD;
1958 };
1959#ifdef AURORA_DEBUG
1960 printk("aurora_ioctl: end\n");
1961#endif
1962 return 0;
1963}
1964
1965static void aurora_throttle(struct tty_struct * tty)
1966{
1967 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1968 struct Aurora_board *bp;
1969 unsigned long flags;
1970 unsigned char chip;
1971
1972#ifdef AURORA_DEBUG
1973 printk("aurora_throttle: start\n");
1974#endif
1975 if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
1976 return;
1977
1978 bp = port_Board(port);
1979 chip = AURORA_CD180(port_No(port));
1980
1981 save_flags(flags); cli();
1982 port->MSVR &= ~bp->RTS;
1983 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1984 udelay(1);
1985 if (I_IXOFF(tty)) {
1986 aurora_wait_CCR(bp->r[chip]);
1987 sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
1988 aurora_wait_CCR(bp->r[chip]);
1989 }
1990 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1991 restore_flags(flags);
1992#ifdef AURORA_DEBUG
1993 printk("aurora_throttle: end\n");
1994#endif
1995}
1996
1997static void aurora_unthrottle(struct tty_struct * tty)
1998{
1999 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2000 struct Aurora_board *bp;
2001 unsigned long flags;
2002 unsigned char chip;
2003
2004#ifdef AURORA_DEBUG
2005 printk("aurora_unthrottle: start\n");
2006#endif
2007 if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
2008 return;
2009
2010 bp = port_Board(port);
2011
2012 chip = AURORA_CD180(port_No(port));
2013
2014 save_flags(flags); cli();
2015 port->MSVR |= bp->RTS;
2016 sbus_writeb(port_No(port) & 7,
2017 &bp->r[chip]->r[CD180_CAR]);
2018 udelay(1);
2019 if (I_IXOFF(tty)) {
2020 aurora_wait_CCR(bp->r[chip]);
2021 sbus_writeb(CCR_SSCH1,
2022 &bp->r[chip]->r[CD180_CCR]);
2023 aurora_wait_CCR(bp->r[chip]);
2024 }
2025 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
2026 restore_flags(flags);
2027#ifdef AURORA_DEBUG
2028 printk("aurora_unthrottle: end\n");
2029#endif
2030}
2031
2032static void aurora_stop(struct tty_struct * tty)
2033{
2034 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2035 struct Aurora_board *bp;
2036 unsigned long flags;
2037 unsigned char chip;
2038
2039#ifdef AURORA_DEBUG
2040 printk("aurora_stop: start\n");
2041#endif
2042 if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
2043 return;
2044
2045 bp = port_Board(port);
2046
2047 chip = AURORA_CD180(port_No(port));
2048
2049 save_flags(flags); cli();
2050 port->SRER &= ~SRER_TXRDY;
2051 sbus_writeb(port_No(port) & 7,
2052 &bp->r[chip]->r[CD180_CAR]);
2053 udelay(1);
2054 sbus_writeb(port->SRER,
2055 &bp->r[chip]->r[CD180_SRER]);
2056 restore_flags(flags);
2057#ifdef AURORA_DEBUG
2058 printk("aurora_stop: end\n");
2059#endif
2060}
2061
2062static void aurora_start(struct tty_struct * tty)
2063{
2064 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2065 struct Aurora_board *bp;
2066 unsigned long flags;
2067 unsigned char chip;
2068
2069#ifdef AURORA_DEBUG
2070 printk("aurora_start: start\n");
2071#endif
2072 if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
2073 return;
2074
2075 bp = port_Board(port);
2076
2077 chip = AURORA_CD180(port_No(port));
2078
2079 save_flags(flags); cli();
2080 if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY)) {
2081 port->SRER |= SRER_TXRDY;
2082 sbus_writeb(port_No(port) & 7,
2083 &bp->r[chip]->r[CD180_CAR]);
2084 udelay(1);
2085 sbus_writeb(port->SRER,
2086 &bp->r[chip]->r[CD180_SRER]);
2087 }
2088 restore_flags(flags);
2089#ifdef AURORA_DEBUG
2090 printk("aurora_start: end\n");
2091#endif
2092}
2093
2094/*
2095 * This routine is called from the scheduler tqueue when the interrupt
2096 * routine has signalled that a hangup has occurred. The path of
2097 * hangup processing is:
2098 *
2099 * serial interrupt routine -> (scheduler tqueue) ->
2100 * do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
2101 *
2102 */
2103static void do_aurora_hangup(void *private_)
2104{
2105 struct Aurora_port *port = (struct Aurora_port *) private_;
2106 struct tty_struct *tty;
2107
2108#ifdef AURORA_DEBUG
2109 printk("do_aurora_hangup: start\n");
2110#endif
2111 tty = port->tty;
2112 if (tty != NULL) {
2113 tty_hangup(tty); /* FIXME: module removal race - AKPM */
2114#ifdef AURORA_DEBUG
2115 printk("do_aurora_hangup: end\n");
2116#endif
2117 }
2118}
2119
2120static void aurora_hangup(struct tty_struct * tty)
2121{
2122 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2123 struct Aurora_board *bp;
2124
2125#ifdef AURORA_DEBUG
2126 printk("aurora_hangup: start\n");
2127#endif
2128 if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
2129 return;
2130
2131 bp = port_Board(port);
2132
2133 aurora_shutdown_port(bp, port);
2134 port->event = 0;
2135 port->count = 0;
2136 port->flags &= ~ASYNC_NORMAL_ACTIVE;
2137 port->tty = 0;
2138 wake_up_interruptible(&port->open_wait);
2139#ifdef AURORA_DEBUG
2140 printk("aurora_hangup: end\n");
2141#endif
2142}
2143
2144static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
2145{
2146 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2147 unsigned long flags;
2148
2149#ifdef AURORA_DEBUG
2150 printk("aurora_set_termios: start\n");
2151#endif
2152 if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
2153 return;
2154
2155 if (tty->termios->c_cflag == old_termios->c_cflag &&
2156 tty->termios->c_iflag == old_termios->c_iflag)
2157 return;
2158
2159 save_flags(flags); cli();
2160 aurora_change_speed(port_Board(port), port);
2161 restore_flags(flags);
2162
2163 if ((old_termios->c_cflag & CRTSCTS) &&
2164 !(tty->termios->c_cflag & CRTSCTS)) {
2165 tty->hw_stopped = 0;
2166 aurora_start(tty);
2167 }
2168#ifdef AURORA_DEBUG
2169 printk("aurora_set_termios: end\n");
2170#endif
2171}
2172
2173static void do_aurora_bh(void)
2174{
2175 run_task_queue(&tq_aurora);
2176}
2177
2178static void do_softint(void *private_)
2179{
2180 struct Aurora_port *port = (struct Aurora_port *) private_;
2181 struct tty_struct *tty;
2182
2183#ifdef AURORA_DEBUG
2184 printk("do_softint: start\n");
2185#endif
2186 tty = port->tty;
2187 if (tty == NULL)
2188 return;
2189
2190 if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
2191 tty_wakeup(tty);
2192 }
2193#ifdef AURORA_DEBUG
2194 printk("do_softint: end\n");
2195#endif
2196}
2197
2198static struct tty_operations aurora_ops = {
2199 .open = aurora_open,
2200 .close = aurora_close,
2201 .write = aurora_write,
2202 .put_char = aurora_put_char,
2203 .flush_chars = aurora_flush_chars,
2204 .write_room = aurora_write_room,
2205 .chars_in_buffer = aurora_chars_in_buffer,
2206 .flush_buffer = aurora_flush_buffer,
2207 .ioctl = aurora_ioctl,
2208 .throttle = aurora_throttle,
2209 .unthrottle = aurora_unthrottle,
2210 .set_termios = aurora_set_termios,
2211 .stop = aurora_stop,
2212 .start = aurora_start,
2213 .hangup = aurora_hangup,
2214 .tiocmget = aurora_tiocmget,
2215 .tiocmset = aurora_tiocmset,
2216};
2217
2218static int aurora_init_drivers(void)
2219{
2220 int error;
2221 int i;
2222
2223#ifdef AURORA_DEBUG
2224 printk("aurora_init_drivers: start\n");
2225#endif
2226 tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
2227 if (tmp_buf == NULL) {
2228 printk(KERN_ERR "aurora: Couldn't get free page.\n");
2229 return 1;
2230 }
2231 init_bh(AURORA_BH, do_aurora_bh);
2232 aurora_driver = alloc_tty_driver(AURORA_INPORTS);
2233 if (!aurora_driver) {
2234 printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
2235 free_page((unsigned long) tmp_buf);
2236 return 1;
2237 }
2238 aurora_driver->owner = THIS_MODULE;
2239 aurora_driver->name = "ttyA";
2240 aurora_driver->major = AURORA_MAJOR;
2241 aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
2242 aurora_driver->subtype = SERIAL_TYPE_NORMAL;
2243 aurora_driver->init_termios = tty_std_termios;
2244 aurora_driver->init_termios.c_cflag =
2245 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2246 aurora_driver->flags = TTY_DRIVER_REAL_RAW;
2247 tty_set_operations(aurora_driver, &aurora_ops);
2248 error = tty_register_driver(aurora_driver);
2249 if (error) {
2250 put_tty_driver(aurora_driver);
2251 free_page((unsigned long) tmp_buf);
2252 printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
2253 error);
2254 return 1;
2255 }
2256
2257 memset(aurora_port, 0, sizeof(aurora_port));
2258 for (i = 0; i < AURORA_TNPORTS; i++) {
2259 aurora_port[i].magic = AURORA_MAGIC;
2260 aurora_port[i].tqueue.routine = do_softint;
2261 aurora_port[i].tqueue.data = &aurora_port[i];
2262 aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
2263 aurora_port[i].tqueue_hangup.data = &aurora_port[i];
2264 aurora_port[i].close_delay = 50 * HZ/100;
2265 aurora_port[i].closing_wait = 3000 * HZ/100;
2266 init_waitqueue_head(&aurora_port[i].open_wait);
2267 init_waitqueue_head(&aurora_port[i].close_wait);
2268 }
2269#ifdef AURORA_DEBUG
2270 printk("aurora_init_drivers: end\n");
2271#endif
2272 return 0;
2273}
2274
2275static void aurora_release_drivers(void)
2276{
2277#ifdef AURORA_DEBUG
2278 printk("aurora_release_drivers: start\n");
2279#endif
2280 free_page((unsigned long)tmp_buf);
2281 tty_unregister_driver(aurora_driver);
2282 put_tty_driver(aurora_driver);
2283#ifdef AURORA_DEBUG
2284 printk("aurora_release_drivers: end\n");
2285#endif
2286}
2287
2288/*
2289 * Called at boot time.
2290 *
2291 * You can specify IO base for up to RC_NBOARD cards,
2292 * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
2293 * Note that there will be no probing at default
2294 * addresses in this case.
2295 *
2296 */
2297void __init aurora_setup(char *str, int *ints)
2298{
2299 int i;
2300
2301 for(i=0;(i<ints[0])&&(i<4);i++) {
2302 if (ints[i+1]) irqs[i]=ints[i+1];
2303 }
2304}
2305
2306static int __init aurora_real_init(void)
2307{
2308 int found;
2309 int i;
2310
2311 printk(KERN_INFO "aurora: Driver starting.\n");
2312 if(aurora_init_drivers())
2313 return -EIO;
2314 found = aurora_probe();
2315 if(!found) {
2316 aurora_release_drivers();
2317 printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
2318 return -EIO;
2319 } else {
2320 printk(KERN_INFO "aurora: %d boards found.\n", found);
2321 }
2322 for (i = 0; i < found; i++) {
2323 int ret = aurora_setup_board(&aurora_board[i]);
2324
2325 if (ret) {
2326#ifdef AURORA_DEBUG
2327 printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
2328 ret);
2329#endif
2330 return ret;
2331 }
2332 }
2333 return 0;
2334}
2335
2336int irq = 0;
2337int irq1 = 0;
2338int irq2 = 0;
2339int irq3 = 0;
2340module_param(irq , int, 0);
2341module_param(irq1, int, 0);
2342module_param(irq2, int, 0);
2343module_param(irq3, int, 0);
2344
2345static int __init aurora_init(void)
2346{
2347 if (irq ) irqs[0]=irq ;
2348 if (irq1) irqs[1]=irq1;
2349 if (irq2) irqs[2]=irq2;
2350 if (irq3) irqs[3]=irq3;
2351 return aurora_real_init();
2352}
2353
2354static void __exit aurora_cleanup(void)
2355{
2356 int i;
2357
2358#ifdef AURORA_DEBUG
2359printk("cleanup_module: aurora_release_drivers\n");
2360#endif
2361
2362 aurora_release_drivers();
2363 for (i = 0; i < AURORA_NBOARD; i++)
2364 if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
2365 aurora_shutdown_board(&aurora_board[i]);
2366 aurora_release_io_range(&aurora_board[i]);
2367 }
2368}
2369
2370module_init(aurora_init);
2371module_exit(aurora_cleanup);
2372MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/aurora.h b/drivers/sbus/char/aurora.h
new file mode 100644
index 00000000000..b8b5476d986
--- /dev/null
+++ b/drivers/sbus/char/aurora.h
@@ -0,0 +1,276 @@
1/* $Id: aurora.h,v 1.6 2001/06/05 12:23:38 davem Exp $
2 * linux/drivers/sbus/char/aurora.h -- Aurora multiport driver
3 *
4 * Copyright (c) 1999 by Oliver Aldulea (oli@bv.ro)
5 *
6 * This code is based on the RISCom/8 multiport serial driver written
7 * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
8 * driver, written by Linus Torvalds, Theodore T'so and others.
9 * The Aurora multiport programming info was obtained mainly from the
10 * Cirrus Logic CD180 documentation (available on the web), and by
11 * doing heavy tests on the board. Many thanks to Eddie C. Dost for the
12 * help on the sbus interface.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * Revision 1.0
29 *
30 * This is the first public release.
31 *
32 * This version needs a lot of feedback. This is the version that works
33 * with _my_ board. My board is model 1600se, revision '@(#)1600se.fth
34 * 1.2 3/28/95 1'. The driver might work with your board, but I do not
35 * guarantee it. If you have _any_ type of board, I need to know if the
36 * driver works or not, I need to know exactly your board parameters
37 * (get them with 'cd /proc/openprom/iommu/sbus/sio16/; ls *; cat *')
38 * Also, I need your board revision code, which is written on the board.
39 * Send me the output of my driver too (it outputs through klogd).
40 *
41 * If the driver does not work, you can try enabling the debug options
42 * to see what's wrong or what should be done.
43 *
44 * I'm sorry about the alignment of the code. It was written in a
45 * 128x48 environment.
46 *
47 * I must say that I do not like Aurora Technologies' policy. I asked
48 * them to help me do this driver faster, but they ended by something
49 * like "don't call us, we'll call you", and I never heard anything
50 * from them. They told me "knowing the way the board works, I don't
51 * doubt you and others on the net will make the driver."
52 * The truth about this board is that it has nothing intelligent on it.
53 * If you want to say to somebody what kind of board you have, say that
54 * it uses Cirrus Logic processors (CD180). The power of the board is
55 * in those two chips. The rest of the board is the interface to the
56 * sbus and to the peripherals. Still, they did something smart: they
57 * reversed DTR and RTS to make on-board automatic hardware flow
58 * control usable.
59 * Thanks to Aurora Technologies for wasting my time, nerves and money.
60 */
61
62#ifndef __LINUX_AURORA_H
63#define __LINUX_AURORA_H
64
65#include <linux/serial.h>
66#include <linux/serialP.h>
67
68#ifdef __KERNEL__
69
70/* This is the number of boards to support. I've only tested this driver with
71 * one board, so it might not work.
72 */
73#define AURORA_NBOARD 1
74
75/* Useful ? Yes. But you can safely comment the warnings if they annoy you
76 * (let me say that again: the warnings in the code, not this define).
77 */
78#define AURORA_PARANOIA_CHECK
79
80/* Well, after many lost nights, I found that the IRQ for this board is
81 * selected from four built-in values by writing some bits in the
82 * configuration register. This causes a little problem to occur: which
83 * IRQ to select ? Which one is the best for the user ? Well, I finally
84 * decided for the following algorithm: if the "bintr" value is not acceptable
85 * (not within type_1_irq[], then test the "intr" value, if that fails too,
86 * try each value from type_1_irq until succeded. Hope it's ok.
87 * You can safely reorder the irq's.
88 */
89#define TYPE_1_IRQS 4
90unsigned char type_1_irq[TYPE_1_IRQS] = {
91 3, 5, 9, 13
92};
93/* I know something about another method of interrupt setting, but not enough.
94 * Also, this is for another type of board, so I first have to learn how to
95 * detect it.
96#define TYPE_2_IRQS 3
97unsigned char type_2_irq[TYPE_2_IRQS] = {
98 0, 0, 0 ** could anyone find these for me ? (see AURORA_ALLIRQ below) **
99 };
100unsigned char type_2_mask[TYPE_2_IRQS] = {
101 32, 64, 128
102 };
103*/
104
105/* The following section should only be modified by those who know what
106 * they're doing (or don't, but want to help with some feedback). Modifying
107 * anything raises a _big_ probability for your system to hang, but the
108 * sacrifice worths. (I sacrificed my ext2fs many, many times...)
109 */
110
111/* This one tries to dump to console the name of almost every function called,
112 * and many other debugging info.
113 */
114#undef AURORA_DEBUG
115
116/* These are the most dangerous and useful defines. They do printk() during
117 * the interrupt processing routine(s), so if you manage to get "flooded" by
118 * irq's, start thinking about the "Power off/on" button...
119 */
120#undef AURORA_INTNORM /* This one enables the "normal" messages, but some
121 * of them cause flood, so I preffered putting
122 * them under a define */
123#undef AURORA_INT_DEBUG /* This one is really bad. */
124
125/* Here's something helpful: after n irq's, the board will be disabled. This
126 * prevents irq flooding during debug (no need to think about power
127 * off/on anymore...)
128 */
129#define AURORA_FLOODPRO 10
130
131/* This one helps finding which irq the board calls, in case of a strange/
132 * unsupported board. AURORA_INT_DEBUG should be enabled, because I don't
133 * think /proc/interrupts or any command will be available in case of an irq
134 * flood... "allirq" is the list of all free irq's.
135 */
136/*
137#define AURORA_ALLIRQ 6
138int allirq[AURORA_ALLIRQ]={
139 2,3,5,7,9,13
140 };
141*/
142
143/* These must not be modified. These values are assumed during the code for
144 * performance optimisations.
145 */
146#define AURORA_NCD180 2 /* two chips per board */
147#define AURORA_NPORT 8 /* 8 ports per chip */
148
149/* several utilities */
150#define AURORA_BOARD(line) (((line) >> 4) & 0x01)
151#define AURORA_CD180(line) (((line) >> 3) & 0x01)
152#define AURORA_PORT(line) ((line) & 15)
153
154#define AURORA_TNPORTS (AURORA_NBOARD*AURORA_NCD180*AURORA_NPORT)
155
156/* Ticks per sec. Used for setting receiver timeout and break length */
157#define AURORA_TPS 4000
158
159#define AURORA_MAGIC 0x0A18
160
161/* Yeah, after heavy testing I decided it must be 6.
162 * Sure, You can change it if needed.
163 */
164#define AURORA_RXFIFO 6 /* Max. receiver FIFO size (1-8) */
165
166#define AURORA_RXTH 7
167
168struct aurora_reg1 {
169 __volatile__ unsigned char r;
170};
171
172struct aurora_reg128 {
173 __volatile__ unsigned char r[128];
174};
175
176struct aurora_reg4 {
177 __volatile__ unsigned char r[4];
178};
179
180struct Aurora_board {
181 unsigned long flags;
182 struct aurora_reg1 * r0; /* This is the board configuration
183 * register (write-only). */
184 struct aurora_reg128 * r[2]; /* These are the registers for the
185 * two chips. */
186 struct aurora_reg4 * r3; /* These are used for hardware-based
187 * acknowledge. Software-based ack is
188 * not supported by CD180. */
189 unsigned int oscfreq; /* The on-board oscillator
190 * frequency, in Hz. */
191 unsigned char irq;
192#ifdef MODULE
193 signed char count; /* counts the use of the board */
194#endif
195 /* Values for the dtr_rts swapped mode. */
196 unsigned char DTR;
197 unsigned char RTS;
198 unsigned char MSVDTR;
199 unsigned char MSVRTS;
200 /* Values for hardware acknowledge. */
201 unsigned char ACK_MINT, ACK_TINT, ACK_RINT;
202};
203
204/* Board configuration register */
205#define AURORA_CFG_ENABLE_IO 8
206#define AURORA_CFG_ENABLE_IRQ 4
207
208/* Board flags */
209#define AURORA_BOARD_PRESENT 0x00000001
210#define AURORA_BOARD_ACTIVE 0x00000002
211#define AURORA_BOARD_TYPE_2 0x00000004 /* don't know how to
212 * detect this yet */
213#define AURORA_BOARD_DTR_FLOW_OK 0x00000008
214
215/* The story goes like this: Cirrus programmed the CD-180 chip to do automatic
216 * hardware flow control, and do it using CTS and DTR. CTS is ok, but, if you
217 * have a modem and the chip drops DTR, then the modem will drop the carrier
218 * (ain't that cute...). Luckily, the guys at Aurora decided to swap DTR and
219 * RTS, which makes the flow control usable. I hope that all the boards made
220 * by Aurora have these two signals swapped. If your's doesn't but you have a
221 * breakout box, you can try to reverse them yourself, then set the following
222 * flag.
223 */
224#undef AURORA_FORCE_DTR_FLOW
225
226/* In fact, a few more words have to be said about hardware flow control.
227 * This driver handles "output" flow control through the on-board facility
228 * CTS Auto Enable. For the "input" flow control there are two cases when
229 * the flow should be controlled. The first case is when the kernel is so
230 * busy that it cannot process IRQ's in time; this flow control can only be
231 * activated by the on-board chip, and if the board has RTS and DTR swapped,
232 * this facility is usable. The second case is when the application is so
233 * busy that it cannot receive bytes from the kernel, and this flow must be
234 * activated by software. This second case is not yet implemented in this
235 * driver. Unfortunately, I estimate that the second case is the one that
236 * occurs the most.
237 */
238
239
240struct Aurora_port {
241 int magic;
242 int baud_base;
243 int flags;
244 struct tty_struct * tty;
245 int count;
246 int blocked_open;
247 long event;
248 int timeout;
249 int close_delay;
250 unsigned char * xmit_buf;
251 int custom_divisor;
252 int xmit_head;
253 int xmit_tail;
254 int xmit_cnt;
255 wait_queue_head_t open_wait;
256 wait_queue_head_t close_wait;
257 struct tq_struct tqueue;
258 struct tq_struct tqueue_hangup;
259 short wakeup_chars;
260 short break_length;
261 unsigned short closing_wait;
262 unsigned char mark_mask;
263 unsigned char SRER;
264 unsigned char MSVR;
265 unsigned char COR2;
266#ifdef AURORA_REPORT_OVERRUN
267 unsigned long overrun;
268#endif
269#ifdef AURORA_REPORT_FIFO
270 unsigned long hits[10];
271#endif
272};
273
274#endif
275#endif /*__LINUX_AURORA_H*/
276
diff --git a/drivers/sbus/char/bbc_envctrl.c b/drivers/sbus/char/bbc_envctrl.c
new file mode 100644
index 00000000000..d5259f7fee6
--- /dev/null
+++ b/drivers/sbus/char/bbc_envctrl.c
@@ -0,0 +1,645 @@
1/* $Id: bbc_envctrl.c,v 1.4 2001/04/06 16:48:08 davem Exp $
2 * bbc_envctrl.c: UltraSPARC-III environment control driver.
3 *
4 * Copyright (C) 2001 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/kernel.h>
8#include <linux/sched.h>
9#include <linux/slab.h>
10#include <linux/delay.h>
11#include <asm/oplib.h>
12#include <asm/ebus.h>
13#define __KERNEL_SYSCALLS__
14static int errno;
15#include <asm/unistd.h>
16
17#include "bbc_i2c.h"
18#include "max1617.h"
19
20#undef ENVCTRL_TRACE
21
22/* WARNING: Making changes to this driver is very dangerous.
23 * If you misprogram the sensor chips they can
24 * cut the power on you instantly.
25 */
26
27/* Two temperature sensors exist in the SunBLADE-1000 enclosure.
28 * Both are implemented using max1617 i2c devices. Each max1617
29 * monitors 2 temperatures, one for one of the cpu dies and the other
30 * for the ambient temperature.
31 *
32 * The max1617 is capable of being programmed with power-off
33 * temperature values, one low limit and one high limit. These
34 * can be controlled independently for the cpu or ambient temperature.
35 * If a limit is violated, the power is simply shut off. The frequency
36 * with which the max1617 does temperature sampling can be controlled
37 * as well.
38 *
39 * Three fans exist inside the machine, all three are controlled with
40 * an i2c digital to analog converter. There is a fan directed at the
41 * two processor slots, another for the rest of the enclosure, and the
42 * third is for the power supply. The first two fans may be speed
43 * controlled by changing the voltage fed to them. The third fan may
44 * only be completely off or on. The third fan is meant to only be
45 * disabled/enabled when entering/exiting the lowest power-saving
46 * mode of the machine.
47 *
48 * An environmental control kernel thread periodically monitors all
49 * temperature sensors. Based upon the samples it will adjust the
50 * fan speeds to try and keep the system within a certain temperature
51 * range (the goal being to make the fans as quiet as possible without
52 * allowing the system to get too hot).
53 *
54 * If the temperature begins to rise/fall outside of the acceptable
55 * operating range, a periodic warning will be sent to the kernel log.
56 * The fans will be put on full blast to attempt to deal with this
57 * situation. After exceeding the acceptable operating range by a
58 * certain threshold, the kernel thread will shut down the system.
59 * Here, the thread is attempting to shut the machine down cleanly
60 * before the hardware based power-off event is triggered.
61 */
62
63/* These settings are in Celsius. We use these defaults only
64 * if we cannot interrogate the cpu-fru SEEPROM.
65 */
66struct temp_limits {
67 s8 high_pwroff, high_shutdown, high_warn;
68 s8 low_warn, low_shutdown, low_pwroff;
69};
70
71static struct temp_limits cpu_temp_limits[2] = {
72 { 100, 85, 80, 5, -5, -10 },
73 { 100, 85, 80, 5, -5, -10 },
74};
75
76static struct temp_limits amb_temp_limits[2] = {
77 { 65, 55, 40, 5, -5, -10 },
78 { 65, 55, 40, 5, -5, -10 },
79};
80
81enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };
82
83struct bbc_cpu_temperature {
84 struct bbc_cpu_temperature *next;
85
86 struct bbc_i2c_client *client;
87 int index;
88
89 /* Current readings, and history. */
90 s8 curr_cpu_temp;
91 s8 curr_amb_temp;
92 s8 prev_cpu_temp;
93 s8 prev_amb_temp;
94 s8 avg_cpu_temp;
95 s8 avg_amb_temp;
96
97 int sample_tick;
98
99 enum fan_action fan_todo[2];
100#define FAN_AMBIENT 0
101#define FAN_CPU 1
102};
103
104struct bbc_cpu_temperature *all_bbc_temps;
105
106struct bbc_fan_control {
107 struct bbc_fan_control *next;
108
109 struct bbc_i2c_client *client;
110 int index;
111
112 int psupply_fan_on;
113 int cpu_fan_speed;
114 int system_fan_speed;
115};
116
117struct bbc_fan_control *all_bbc_fans;
118
119#define CPU_FAN_REG 0xf0
120#define SYS_FAN_REG 0xf2
121#define PSUPPLY_FAN_REG 0xf4
122
123#define FAN_SPEED_MIN 0x0c
124#define FAN_SPEED_MAX 0x3f
125
126#define PSUPPLY_FAN_ON 0x1f
127#define PSUPPLY_FAN_OFF 0x00
128
129static void set_fan_speeds(struct bbc_fan_control *fp)
130{
131 /* Put temperatures into range so we don't mis-program
132 * the hardware.
133 */
134 if (fp->cpu_fan_speed < FAN_SPEED_MIN)
135 fp->cpu_fan_speed = FAN_SPEED_MIN;
136 if (fp->cpu_fan_speed > FAN_SPEED_MAX)
137 fp->cpu_fan_speed = FAN_SPEED_MAX;
138 if (fp->system_fan_speed < FAN_SPEED_MIN)
139 fp->system_fan_speed = FAN_SPEED_MIN;
140 if (fp->system_fan_speed > FAN_SPEED_MAX)
141 fp->system_fan_speed = FAN_SPEED_MAX;
142#ifdef ENVCTRL_TRACE
143 printk("fan%d: Changed fan speed to cpu(%02x) sys(%02x)\n",
144 fp->index,
145 fp->cpu_fan_speed, fp->system_fan_speed);
146#endif
147
148 bbc_i2c_writeb(fp->client, fp->cpu_fan_speed, CPU_FAN_REG);
149 bbc_i2c_writeb(fp->client, fp->system_fan_speed, SYS_FAN_REG);
150 bbc_i2c_writeb(fp->client,
151 (fp->psupply_fan_on ?
152 PSUPPLY_FAN_ON : PSUPPLY_FAN_OFF),
153 PSUPPLY_FAN_REG);
154}
155
156static void get_current_temps(struct bbc_cpu_temperature *tp)
157{
158 tp->prev_amb_temp = tp->curr_amb_temp;
159 bbc_i2c_readb(tp->client,
160 (unsigned char *) &tp->curr_amb_temp,
161 MAX1617_AMB_TEMP);
162 tp->prev_cpu_temp = tp->curr_cpu_temp;
163 bbc_i2c_readb(tp->client,
164 (unsigned char *) &tp->curr_cpu_temp,
165 MAX1617_CPU_TEMP);
166#ifdef ENVCTRL_TRACE
167 printk("temp%d: cpu(%d C) amb(%d C)\n",
168 tp->index,
169 (int) tp->curr_cpu_temp, (int) tp->curr_amb_temp);
170#endif
171}
172
173
174static void do_envctrl_shutdown(struct bbc_cpu_temperature *tp)
175{
176 static int shutting_down = 0;
177 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
178 char *argv[] = { "/sbin/shutdown", "-h", "now", NULL };
179 char *type = "???";
180 s8 val = -1;
181
182 if (shutting_down != 0)
183 return;
184
185 if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_shutdown ||
186 tp->curr_amb_temp < amb_temp_limits[tp->index].low_shutdown) {
187 type = "ambient";
188 val = tp->curr_amb_temp;
189 } else if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_shutdown ||
190 tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_shutdown) {
191 type = "CPU";
192 val = tp->curr_cpu_temp;
193 }
194
195 printk(KERN_CRIT "temp%d: Outside of safe %s "
196 "operating temperature, %d C.\n",
197 tp->index, type, val);
198
199 printk(KERN_CRIT "kenvctrld: Shutting down the system now.\n");
200
201 shutting_down = 1;
202 if (execve("/sbin/shutdown", argv, envp) < 0)
203 printk(KERN_CRIT "envctrl: shutdown execution failed\n");
204}
205
206#define WARN_INTERVAL (30 * HZ)
207
208static void analyze_ambient_temp(struct bbc_cpu_temperature *tp, unsigned long *last_warn, int tick)
209{
210 int ret = 0;
211
212 if (time_after(jiffies, (*last_warn + WARN_INTERVAL))) {
213 if (tp->curr_amb_temp >=
214 amb_temp_limits[tp->index].high_warn) {
215 printk(KERN_WARNING "temp%d: "
216 "Above safe ambient operating temperature, %d C.\n",
217 tp->index, (int) tp->curr_amb_temp);
218 ret = 1;
219 } else if (tp->curr_amb_temp <
220 amb_temp_limits[tp->index].low_warn) {
221 printk(KERN_WARNING "temp%d: "
222 "Below safe ambient operating temperature, %d C.\n",
223 tp->index, (int) tp->curr_amb_temp);
224 ret = 1;
225 }
226 if (ret)
227 *last_warn = jiffies;
228 } else if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_warn ||
229 tp->curr_amb_temp < amb_temp_limits[tp->index].low_warn)
230 ret = 1;
231
232 /* Now check the shutdown limits. */
233 if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_shutdown ||
234 tp->curr_amb_temp < amb_temp_limits[tp->index].low_shutdown) {
235 do_envctrl_shutdown(tp);
236 ret = 1;
237 }
238
239 if (ret) {
240 tp->fan_todo[FAN_AMBIENT] = FAN_FULLBLAST;
241 } else if ((tick & (8 - 1)) == 0) {
242 s8 amb_goal_hi = amb_temp_limits[tp->index].high_warn - 10;
243 s8 amb_goal_lo;
244
245 amb_goal_lo = amb_goal_hi - 3;
246
247 /* We do not try to avoid 'too cold' events. Basically we
248 * only try to deal with over-heating and fan noise reduction.
249 */
250 if (tp->avg_amb_temp < amb_goal_hi) {
251 if (tp->avg_amb_temp >= amb_goal_lo)
252 tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
253 else
254 tp->fan_todo[FAN_AMBIENT] = FAN_SLOWER;
255 } else {
256 tp->fan_todo[FAN_AMBIENT] = FAN_FASTER;
257 }
258 } else {
259 tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
260 }
261}
262
263static void analyze_cpu_temp(struct bbc_cpu_temperature *tp, unsigned long *last_warn, int tick)
264{
265 int ret = 0;
266
267 if (time_after(jiffies, (*last_warn + WARN_INTERVAL))) {
268 if (tp->curr_cpu_temp >=
269 cpu_temp_limits[tp->index].high_warn) {
270 printk(KERN_WARNING "temp%d: "
271 "Above safe CPU operating temperature, %d C.\n",
272 tp->index, (int) tp->curr_cpu_temp);
273 ret = 1;
274 } else if (tp->curr_cpu_temp <
275 cpu_temp_limits[tp->index].low_warn) {
276 printk(KERN_WARNING "temp%d: "
277 "Below safe CPU operating temperature, %d C.\n",
278 tp->index, (int) tp->curr_cpu_temp);
279 ret = 1;
280 }
281 if (ret)
282 *last_warn = jiffies;
283 } else if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_warn ||
284 tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_warn)
285 ret = 1;
286
287 /* Now check the shutdown limits. */
288 if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_shutdown ||
289 tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_shutdown) {
290 do_envctrl_shutdown(tp);
291 ret = 1;
292 }
293
294 if (ret) {
295 tp->fan_todo[FAN_CPU] = FAN_FULLBLAST;
296 } else if ((tick & (8 - 1)) == 0) {
297 s8 cpu_goal_hi = cpu_temp_limits[tp->index].high_warn - 10;
298 s8 cpu_goal_lo;
299
300 cpu_goal_lo = cpu_goal_hi - 3;
301
302 /* We do not try to avoid 'too cold' events. Basically we
303 * only try to deal with over-heating and fan noise reduction.
304 */
305 if (tp->avg_cpu_temp < cpu_goal_hi) {
306 if (tp->avg_cpu_temp >= cpu_goal_lo)
307 tp->fan_todo[FAN_CPU] = FAN_SAME;
308 else
309 tp->fan_todo[FAN_CPU] = FAN_SLOWER;
310 } else {
311 tp->fan_todo[FAN_CPU] = FAN_FASTER;
312 }
313 } else {
314 tp->fan_todo[FAN_CPU] = FAN_SAME;
315 }
316}
317
318static void analyze_temps(struct bbc_cpu_temperature *tp, unsigned long *last_warn)
319{
320 tp->avg_amb_temp = (s8)((int)((int)tp->avg_amb_temp + (int)tp->curr_amb_temp) / 2);
321 tp->avg_cpu_temp = (s8)((int)((int)tp->avg_cpu_temp + (int)tp->curr_cpu_temp) / 2);
322
323 analyze_ambient_temp(tp, last_warn, tp->sample_tick);
324 analyze_cpu_temp(tp, last_warn, tp->sample_tick);
325
326 tp->sample_tick++;
327}
328
329static enum fan_action prioritize_fan_action(int which_fan)
330{
331 struct bbc_cpu_temperature *tp;
332 enum fan_action decision = FAN_STATE_MAX;
333
334 /* Basically, prioritize what the temperature sensors
335 * recommend we do, and perform that action on all the
336 * fans.
337 */
338 for (tp = all_bbc_temps; tp; tp = tp->next) {
339 if (tp->fan_todo[which_fan] == FAN_FULLBLAST) {
340 decision = FAN_FULLBLAST;
341 break;
342 }
343 if (tp->fan_todo[which_fan] == FAN_SAME &&
344 decision != FAN_FASTER)
345 decision = FAN_SAME;
346 else if (tp->fan_todo[which_fan] == FAN_FASTER)
347 decision = FAN_FASTER;
348 else if (decision != FAN_FASTER &&
349 decision != FAN_SAME &&
350 tp->fan_todo[which_fan] == FAN_SLOWER)
351 decision = FAN_SLOWER;
352 }
353 if (decision == FAN_STATE_MAX)
354 decision = FAN_SAME;
355
356 return decision;
357}
358
359static int maybe_new_ambient_fan_speed(struct bbc_fan_control *fp)
360{
361 enum fan_action decision = prioritize_fan_action(FAN_AMBIENT);
362 int ret;
363
364 if (decision == FAN_SAME)
365 return 0;
366
367 ret = 1;
368 if (decision == FAN_FULLBLAST) {
369 if (fp->system_fan_speed >= FAN_SPEED_MAX)
370 ret = 0;
371 else
372 fp->system_fan_speed = FAN_SPEED_MAX;
373 } else {
374 if (decision == FAN_FASTER) {
375 if (fp->system_fan_speed >= FAN_SPEED_MAX)
376 ret = 0;
377 else
378 fp->system_fan_speed += 2;
379 } else {
380 int orig_speed = fp->system_fan_speed;
381
382 if (orig_speed <= FAN_SPEED_MIN ||
383 orig_speed <= (fp->cpu_fan_speed - 3))
384 ret = 0;
385 else
386 fp->system_fan_speed -= 1;
387 }
388 }
389
390 return ret;
391}
392
393static int maybe_new_cpu_fan_speed(struct bbc_fan_control *fp)
394{
395 enum fan_action decision = prioritize_fan_action(FAN_CPU);
396 int ret;
397
398 if (decision == FAN_SAME)
399 return 0;
400
401 ret = 1;
402 if (decision == FAN_FULLBLAST) {
403 if (fp->cpu_fan_speed >= FAN_SPEED_MAX)
404 ret = 0;
405 else
406 fp->cpu_fan_speed = FAN_SPEED_MAX;
407 } else {
408 if (decision == FAN_FASTER) {
409 if (fp->cpu_fan_speed >= FAN_SPEED_MAX)
410 ret = 0;
411 else {
412 fp->cpu_fan_speed += 2;
413 if (fp->system_fan_speed <
414 (fp->cpu_fan_speed - 3))
415 fp->system_fan_speed =
416 fp->cpu_fan_speed - 3;
417 }
418 } else {
419 if (fp->cpu_fan_speed <= FAN_SPEED_MIN)
420 ret = 0;
421 else
422 fp->cpu_fan_speed -= 1;
423 }
424 }
425
426 return ret;
427}
428
429static void maybe_new_fan_speeds(struct bbc_fan_control *fp)
430{
431 int new;
432
433 new = maybe_new_ambient_fan_speed(fp);
434 new |= maybe_new_cpu_fan_speed(fp);
435
436 if (new)
437 set_fan_speeds(fp);
438}
439
440static void fans_full_blast(void)
441{
442 struct bbc_fan_control *fp;
443
444 /* Since we will not be monitoring things anymore, put
445 * the fans on full blast.
446 */
447 for (fp = all_bbc_fans; fp; fp = fp->next) {
448 fp->cpu_fan_speed = FAN_SPEED_MAX;
449 fp->system_fan_speed = FAN_SPEED_MAX;
450 fp->psupply_fan_on = 1;
451 set_fan_speeds(fp);
452 }
453}
454
455#define POLL_INTERVAL (5 * 1000)
456static unsigned long last_warning_jiffies;
457static struct task_struct *kenvctrld_task;
458
459static int kenvctrld(void *__unused)
460{
461 daemonize("kenvctrld");
462 allow_signal(SIGKILL);
463 kenvctrld_task = current;
464
465 printk(KERN_INFO "bbc_envctrl: kenvctrld starting...\n");
466 last_warning_jiffies = jiffies - WARN_INTERVAL;
467 for (;;) {
468 struct bbc_cpu_temperature *tp;
469 struct bbc_fan_control *fp;
470
471 msleep_interruptible(POLL_INTERVAL);
472 if (signal_pending(current))
473 break;
474
475 for (tp = all_bbc_temps; tp; tp = tp->next) {
476 get_current_temps(tp);
477 analyze_temps(tp, &last_warning_jiffies);
478 }
479 for (fp = all_bbc_fans; fp; fp = fp->next)
480 maybe_new_fan_speeds(fp);
481 }
482 printk(KERN_INFO "bbc_envctrl: kenvctrld exiting...\n");
483
484 fans_full_blast();
485
486 return 0;
487}
488
489static void attach_one_temp(struct linux_ebus_child *echild, int temp_idx)
490{
491 struct bbc_cpu_temperature *tp = kmalloc(sizeof(*tp), GFP_KERNEL);
492
493 if (!tp)
494 return;
495 memset(tp, 0, sizeof(*tp));
496 tp->client = bbc_i2c_attach(echild);
497 if (!tp->client) {
498 kfree(tp);
499 return;
500 }
501
502 tp->index = temp_idx;
503 {
504 struct bbc_cpu_temperature **tpp = &all_bbc_temps;
505 while (*tpp)
506 tpp = &((*tpp)->next);
507 tp->next = NULL;
508 *tpp = tp;
509 }
510
511 /* Tell it to convert once every 5 seconds, clear all cfg
512 * bits.
513 */
514 bbc_i2c_writeb(tp->client, 0x00, MAX1617_WR_CFG_BYTE);
515 bbc_i2c_writeb(tp->client, 0x02, MAX1617_WR_CVRATE_BYTE);
516
517 /* Program the hard temperature limits into the chip. */
518 bbc_i2c_writeb(tp->client, amb_temp_limits[tp->index].high_pwroff,
519 MAX1617_WR_AMB_HIGHLIM);
520 bbc_i2c_writeb(tp->client, amb_temp_limits[tp->index].low_pwroff,
521 MAX1617_WR_AMB_LOWLIM);
522 bbc_i2c_writeb(tp->client, cpu_temp_limits[tp->index].high_pwroff,
523 MAX1617_WR_CPU_HIGHLIM);
524 bbc_i2c_writeb(tp->client, cpu_temp_limits[tp->index].low_pwroff,
525 MAX1617_WR_CPU_LOWLIM);
526
527 get_current_temps(tp);
528 tp->prev_cpu_temp = tp->avg_cpu_temp = tp->curr_cpu_temp;
529 tp->prev_amb_temp = tp->avg_amb_temp = tp->curr_amb_temp;
530
531 tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
532 tp->fan_todo[FAN_CPU] = FAN_SAME;
533}
534
535static void attach_one_fan(struct linux_ebus_child *echild, int fan_idx)
536{
537 struct bbc_fan_control *fp = kmalloc(sizeof(*fp), GFP_KERNEL);
538
539 if (!fp)
540 return;
541 memset(fp, 0, sizeof(*fp));
542 fp->client = bbc_i2c_attach(echild);
543 if (!fp->client) {
544 kfree(fp);
545 return;
546 }
547
548 fp->index = fan_idx;
549
550 {
551 struct bbc_fan_control **fpp = &all_bbc_fans;
552 while (*fpp)
553 fpp = &((*fpp)->next);
554 fp->next = NULL;
555 *fpp = fp;
556 }
557
558 /* The i2c device controlling the fans is write-only.
559 * So the only way to keep track of the current power
560 * level fed to the fans is via software. Choose half
561 * power for cpu/system and 'on' fo the powersupply fan
562 * and set it now.
563 */
564 fp->psupply_fan_on = 1;
565 fp->cpu_fan_speed = (FAN_SPEED_MAX - FAN_SPEED_MIN) / 2;
566 fp->cpu_fan_speed += FAN_SPEED_MIN;
567 fp->system_fan_speed = (FAN_SPEED_MAX - FAN_SPEED_MIN) / 2;
568 fp->system_fan_speed += FAN_SPEED_MIN;
569
570 set_fan_speeds(fp);
571}
572
573int bbc_envctrl_init(void)
574{
575 struct linux_ebus_child *echild;
576 int temp_index = 0;
577 int fan_index = 0;
578 int devidx = 0;
579 int err = 0;
580
581 while ((echild = bbc_i2c_getdev(devidx++)) != NULL) {
582 if (!strcmp(echild->prom_name, "temperature"))
583 attach_one_temp(echild, temp_index++);
584 if (!strcmp(echild->prom_name, "fan-control"))
585 attach_one_fan(echild, fan_index++);
586 }
587 if (temp_index != 0 && fan_index != 0)
588 err = kernel_thread(kenvctrld, NULL, CLONE_FS | CLONE_FILES);
589 return err;
590}
591
592static void destroy_one_temp(struct bbc_cpu_temperature *tp)
593{
594 bbc_i2c_detach(tp->client);
595 kfree(tp);
596}
597
598static void destroy_one_fan(struct bbc_fan_control *fp)
599{
600 bbc_i2c_detach(fp->client);
601 kfree(fp);
602}
603
604void bbc_envctrl_cleanup(void)
605{
606 struct bbc_cpu_temperature *tp;
607 struct bbc_fan_control *fp;
608
609 if (kenvctrld_task != NULL) {
610 force_sig(SIGKILL, kenvctrld_task);
611 for (;;) {
612 struct task_struct *p;
613 int found = 0;
614
615 read_lock(&tasklist_lock);
616 for_each_process(p) {
617 if (p == kenvctrld_task) {
618 found = 1;
619 break;
620 }
621 }
622 read_unlock(&tasklist_lock);
623 if (!found)
624 break;
625 msleep(1000);
626 }
627 kenvctrld_task = NULL;
628 }
629
630 tp = all_bbc_temps;
631 while (tp != NULL) {
632 struct bbc_cpu_temperature *next = tp->next;
633 destroy_one_temp(tp);
634 tp = next;
635 }
636 all_bbc_temps = NULL;
637
638 fp = all_bbc_fans;
639 while (fp != NULL) {
640 struct bbc_fan_control *next = fp->next;
641 destroy_one_fan(fp);
642 fp = next;
643 }
644 all_bbc_fans = NULL;
645}
diff --git a/drivers/sbus/char/bbc_i2c.c b/drivers/sbus/char/bbc_i2c.c
new file mode 100644
index 00000000000..1c8b612d823
--- /dev/null
+++ b/drivers/sbus/char/bbc_i2c.c
@@ -0,0 +1,488 @@
1/* $Id: bbc_i2c.c,v 1.2 2001/04/02 09:59:08 davem Exp $
2 * bbc_i2c.c: I2C low-level driver for BBC device on UltraSPARC-III
3 * platforms.
4 *
5 * Copyright (C) 2001 David S. Miller (davem@redhat.com)
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/slab.h>
12#include <linux/sched.h>
13#include <linux/wait.h>
14#include <linux/delay.h>
15#include <linux/init.h>
16#include <linux/interrupt.h>
17#include <asm/oplib.h>
18#include <asm/ebus.h>
19#include <asm/spitfire.h>
20#include <asm/bbc.h>
21
22#include "bbc_i2c.h"
23
24/* Convert this driver to use i2c bus layer someday... */
25#define I2C_PCF_PIN 0x80
26#define I2C_PCF_ESO 0x40
27#define I2C_PCF_ES1 0x20
28#define I2C_PCF_ES2 0x10
29#define I2C_PCF_ENI 0x08
30#define I2C_PCF_STA 0x04
31#define I2C_PCF_STO 0x02
32#define I2C_PCF_ACK 0x01
33
34#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ENI | I2C_PCF_STA | I2C_PCF_ACK)
35#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
36#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
37#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
38
39#define I2C_PCF_INI 0x40 /* 1 if not initialized */
40#define I2C_PCF_STS 0x20
41#define I2C_PCF_BER 0x10
42#define I2C_PCF_AD0 0x08
43#define I2C_PCF_LRB 0x08
44#define I2C_PCF_AAS 0x04
45#define I2C_PCF_LAB 0x02
46#define I2C_PCF_BB 0x01
47
48/* The BBC devices have two I2C controllers. The first I2C controller
49 * connects mainly to configuration proms (NVRAM, cpu configuration,
50 * dimm types, etc.). Whereas the second I2C controller connects to
51 * environmental control devices such as fans and temperature sensors.
52 * The second controller also connects to the smartcard reader, if present.
53 */
54
55#define NUM_CHILDREN 8
56struct bbc_i2c_bus {
57 struct bbc_i2c_bus *next;
58 int index;
59 spinlock_t lock;
60 void __iomem *i2c_bussel_reg;
61 void __iomem *i2c_control_regs;
62 unsigned char own, clock;
63
64 wait_queue_head_t wq;
65 volatile int waiting;
66
67 struct linux_ebus_device *bus_edev;
68 struct {
69 struct linux_ebus_child *device;
70 int client_claimed;
71 } devs[NUM_CHILDREN];
72};
73
74static struct bbc_i2c_bus *all_bbc_i2c;
75
76struct bbc_i2c_client {
77 struct bbc_i2c_bus *bp;
78 struct linux_ebus_child *echild;
79 int bus;
80 int address;
81};
82
83static int find_device(struct bbc_i2c_bus *bp, struct linux_ebus_child *echild)
84{
85 int i;
86
87 for (i = 0; i < NUM_CHILDREN; i++) {
88 if (bp->devs[i].device == echild) {
89 if (bp->devs[i].client_claimed)
90 return 0;
91 return 1;
92 }
93 }
94 return 0;
95}
96
97static void set_device_claimage(struct bbc_i2c_bus *bp, struct linux_ebus_child *echild, int val)
98{
99 int i;
100
101 for (i = 0; i < NUM_CHILDREN; i++) {
102 if (bp->devs[i].device == echild) {
103 bp->devs[i].client_claimed = val;
104 return;
105 }
106 }
107}
108
109#define claim_device(BP,ECHILD) set_device_claimage(BP,ECHILD,1)
110#define release_device(BP,ECHILD) set_device_claimage(BP,ECHILD,0)
111
112static struct bbc_i2c_bus *find_bus_for_device(struct linux_ebus_child *echild)
113{
114 struct bbc_i2c_bus *bp = all_bbc_i2c;
115
116 while (bp != NULL) {
117 if (find_device(bp, echild) != 0)
118 break;
119 bp = bp->next;
120 }
121
122 return bp;
123}
124
125struct linux_ebus_child *bbc_i2c_getdev(int index)
126{
127 struct bbc_i2c_bus *bp = all_bbc_i2c;
128 struct linux_ebus_child *echild = NULL;
129 int curidx = 0;
130
131 while (bp != NULL) {
132 struct bbc_i2c_bus *next = bp->next;
133 int i;
134
135 for (i = 0; i < NUM_CHILDREN; i++) {
136 if (!(echild = bp->devs[i].device))
137 break;
138 if (curidx == index)
139 goto out;
140 echild = NULL;
141 curidx++;
142 }
143 bp = next;
144 }
145out:
146 if (curidx == index)
147 return echild;
148 return NULL;
149}
150
151struct bbc_i2c_client *bbc_i2c_attach(struct linux_ebus_child *echild)
152{
153 struct bbc_i2c_bus *bp = find_bus_for_device(echild);
154 struct bbc_i2c_client *client;
155
156 if (!bp)
157 return NULL;
158 client = kmalloc(sizeof(*client), GFP_KERNEL);
159 if (!client)
160 return NULL;
161 memset(client, 0, sizeof(*client));
162 client->bp = bp;
163 client->echild = echild;
164 client->bus = echild->resource[0].start;
165 client->address = echild->resource[1].start;
166
167 claim_device(bp, echild);
168
169 return client;
170}
171
172void bbc_i2c_detach(struct bbc_i2c_client *client)
173{
174 struct bbc_i2c_bus *bp = client->bp;
175 struct linux_ebus_child *echild = client->echild;
176
177 release_device(bp, echild);
178 kfree(client);
179}
180
181static int wait_for_pin(struct bbc_i2c_bus *bp, u8 *status)
182{
183 DECLARE_WAITQUEUE(wait, current);
184 int limit = 32;
185 int ret = 1;
186
187 bp->waiting = 1;
188 add_wait_queue(&bp->wq, &wait);
189 while (limit-- > 0) {
190 u8 val;
191
192 set_current_state(TASK_INTERRUPTIBLE);
193 *status = val = readb(bp->i2c_control_regs + 0);
194 if ((val & I2C_PCF_PIN) == 0) {
195 ret = 0;
196 break;
197 }
198 msleep_interruptible(250);
199 }
200 remove_wait_queue(&bp->wq, &wait);
201 bp->waiting = 0;
202 current->state = TASK_RUNNING;
203
204 return ret;
205}
206
207int bbc_i2c_writeb(struct bbc_i2c_client *client, unsigned char val, int off)
208{
209 struct bbc_i2c_bus *bp = client->bp;
210 int address = client->address;
211 u8 status;
212 int ret = -1;
213
214 if (bp->i2c_bussel_reg != NULL)
215 writeb(client->bus, bp->i2c_bussel_reg);
216
217 writeb(address, bp->i2c_control_regs + 0x1);
218 writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);
219 if (wait_for_pin(bp, &status))
220 goto out;
221
222 writeb(off, bp->i2c_control_regs + 0x1);
223 if (wait_for_pin(bp, &status) ||
224 (status & I2C_PCF_LRB) != 0)
225 goto out;
226
227 writeb(val, bp->i2c_control_regs + 0x1);
228 if (wait_for_pin(bp, &status))
229 goto out;
230
231 ret = 0;
232
233out:
234 writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);
235 return ret;
236}
237
238int bbc_i2c_readb(struct bbc_i2c_client *client, unsigned char *byte, int off)
239{
240 struct bbc_i2c_bus *bp = client->bp;
241 unsigned char address = client->address, status;
242 int ret = -1;
243
244 if (bp->i2c_bussel_reg != NULL)
245 writeb(client->bus, bp->i2c_bussel_reg);
246
247 writeb(address, bp->i2c_control_regs + 0x1);
248 writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);
249 if (wait_for_pin(bp, &status))
250 goto out;
251
252 writeb(off, bp->i2c_control_regs + 0x1);
253 if (wait_for_pin(bp, &status) ||
254 (status & I2C_PCF_LRB) != 0)
255 goto out;
256
257 writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);
258
259 address |= 0x1; /* READ */
260
261 writeb(address, bp->i2c_control_regs + 0x1);
262 writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);
263 if (wait_for_pin(bp, &status))
264 goto out;
265
266 /* Set PIN back to one so the device sends the first
267 * byte.
268 */
269 (void) readb(bp->i2c_control_regs + 0x1);
270 if (wait_for_pin(bp, &status))
271 goto out;
272
273 writeb(I2C_PCF_ESO | I2C_PCF_ENI, bp->i2c_control_regs + 0x0);
274 *byte = readb(bp->i2c_control_regs + 0x1);
275 if (wait_for_pin(bp, &status))
276 goto out;
277
278 ret = 0;
279
280out:
281 writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);
282 (void) readb(bp->i2c_control_regs + 0x1);
283
284 return ret;
285}
286
287int bbc_i2c_write_buf(struct bbc_i2c_client *client,
288 char *buf, int len, int off)
289{
290 int ret = 0;
291
292 while (len > 0) {
293 int err = bbc_i2c_writeb(client, *buf, off);
294
295 if (err < 0) {
296 ret = err;
297 break;
298 }
299
300 len--;
301 buf++;
302 off++;
303 }
304 return ret;
305}
306
307int bbc_i2c_read_buf(struct bbc_i2c_client *client,
308 char *buf, int len, int off)
309{
310 int ret = 0;
311
312 while (len > 0) {
313 int err = bbc_i2c_readb(client, buf, off);
314 if (err < 0) {
315 ret = err;
316 break;
317 }
318 len--;
319 buf++;
320 off++;
321 }
322
323 return ret;
324}
325
326EXPORT_SYMBOL(bbc_i2c_getdev);
327EXPORT_SYMBOL(bbc_i2c_attach);
328EXPORT_SYMBOL(bbc_i2c_detach);
329EXPORT_SYMBOL(bbc_i2c_writeb);
330EXPORT_SYMBOL(bbc_i2c_readb);
331EXPORT_SYMBOL(bbc_i2c_write_buf);
332EXPORT_SYMBOL(bbc_i2c_read_buf);
333
334static irqreturn_t bbc_i2c_interrupt(int irq, void *dev_id, struct pt_regs *regs)
335{
336 struct bbc_i2c_bus *bp = dev_id;
337
338 /* PIN going from set to clear is the only event which
339 * makes the i2c assert an interrupt.
340 */
341 if (bp->waiting &&
342 !(readb(bp->i2c_control_regs + 0x0) & I2C_PCF_PIN))
343 wake_up(&bp->wq);
344
345 return IRQ_HANDLED;
346}
347
348static void __init reset_one_i2c(struct bbc_i2c_bus *bp)
349{
350 writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0);
351 writeb(bp->own, bp->i2c_control_regs + 0x1);
352 writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0);
353 writeb(bp->clock, bp->i2c_control_regs + 0x1);
354 writeb(I2C_PCF_IDLE, bp->i2c_control_regs + 0x0);
355}
356
357static int __init attach_one_i2c(struct linux_ebus_device *edev, int index)
358{
359 struct bbc_i2c_bus *bp = kmalloc(sizeof(*bp), GFP_KERNEL);
360 struct linux_ebus_child *echild;
361 int entry;
362
363 if (!bp)
364 return -ENOMEM;
365 memset(bp, 0, sizeof(*bp));
366
367 bp->i2c_control_regs = ioremap(edev->resource[0].start, 0x2);
368 if (!bp->i2c_control_regs)
369 goto fail;
370
371 if (edev->num_addrs == 2) {
372 bp->i2c_bussel_reg = ioremap(edev->resource[1].start, 0x1);
373 if (!bp->i2c_bussel_reg)
374 goto fail;
375 }
376
377 bp->waiting = 0;
378 init_waitqueue_head(&bp->wq);
379 if (request_irq(edev->irqs[0], bbc_i2c_interrupt,
380 SA_SHIRQ, "bbc_i2c", bp))
381 goto fail;
382
383 bp->index = index;
384 bp->bus_edev = edev;
385
386 spin_lock_init(&bp->lock);
387 bp->next = all_bbc_i2c;
388 all_bbc_i2c = bp;
389
390 entry = 0;
391 for (echild = edev->children;
392 echild && entry < 8;
393 echild = echild->next, entry++) {
394 bp->devs[entry].device = echild;
395 bp->devs[entry].client_claimed = 0;
396 }
397
398 writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0);
399 bp->own = readb(bp->i2c_control_regs + 0x01);
400 writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0);
401 bp->clock = readb(bp->i2c_control_regs + 0x01);
402
403 printk(KERN_INFO "i2c-%d: Regs at %p, %d devices, own %02x, clock %02x.\n",
404 bp->index, bp->i2c_control_regs, entry, bp->own, bp->clock);
405
406 reset_one_i2c(bp);
407
408 return 0;
409
410fail:
411 if (bp->i2c_bussel_reg)
412 iounmap(bp->i2c_bussel_reg);
413 if (bp->i2c_control_regs)
414 iounmap(bp->i2c_control_regs);
415 kfree(bp);
416 return -EINVAL;
417}
418
419static int __init bbc_present(void)
420{
421 struct linux_ebus *ebus = NULL;
422 struct linux_ebus_device *edev = NULL;
423
424 for_each_ebus(ebus) {
425 for_each_ebusdev(edev, ebus) {
426 if (!strcmp(edev->prom_name, "bbc"))
427 return 1;
428 }
429 }
430 return 0;
431}
432
433extern int bbc_envctrl_init(void);
434extern void bbc_envctrl_cleanup(void);
435static void bbc_i2c_cleanup(void);
436
437static int __init bbc_i2c_init(void)
438{
439 struct linux_ebus *ebus = NULL;
440 struct linux_ebus_device *edev = NULL;
441 int err, index = 0;
442
443 if (tlb_type != cheetah || !bbc_present())
444 return -ENODEV;
445
446 for_each_ebus(ebus) {
447 for_each_ebusdev(edev, ebus) {
448 if (!strcmp(edev->prom_name, "i2c")) {
449 if (!attach_one_i2c(edev, index))
450 index++;
451 }
452 }
453 }
454
455 if (!index)
456 return -ENODEV;
457
458 err = bbc_envctrl_init();
459 if (err)
460 bbc_i2c_cleanup();
461 return err;
462}
463
464static void bbc_i2c_cleanup(void)
465{
466 struct bbc_i2c_bus *bp = all_bbc_i2c;
467
468 bbc_envctrl_cleanup();
469
470 while (bp != NULL) {
471 struct bbc_i2c_bus *next = bp->next;
472
473 free_irq(bp->bus_edev->irqs[0], bp);
474
475 if (bp->i2c_bussel_reg)
476 iounmap(bp->i2c_bussel_reg);
477 if (bp->i2c_control_regs)
478 iounmap(bp->i2c_control_regs);
479
480 kfree(bp);
481
482 bp = next;
483 }
484 all_bbc_i2c = NULL;
485}
486
487module_init(bbc_i2c_init);
488module_exit(bbc_i2c_cleanup);
diff --git a/drivers/sbus/char/bbc_i2c.h b/drivers/sbus/char/bbc_i2c.h
new file mode 100644
index 00000000000..fb01bd17704
--- /dev/null
+++ b/drivers/sbus/char/bbc_i2c.h
@@ -0,0 +1,20 @@
1/* $Id: bbc_i2c.h,v 1.2 2001/04/02 09:59:25 davem Exp $ */
2#ifndef _BBC_I2C_H
3#define _BBC_I2C_H
4
5#include <asm/ebus.h>
6
7struct bbc_i2c_client;
8
9/* Probing and attachment. */
10extern struct linux_ebus_child *bbc_i2c_getdev(int);
11extern struct bbc_i2c_client *bbc_i2c_attach(struct linux_ebus_child *);
12extern void bbc_i2c_detach(struct bbc_i2c_client *);
13
14/* Register read/write. NOTE: Blocking! */
15extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off);
16extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);
17extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off);
18extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off);
19
20#endif /* _BBC_I2C_H */
diff --git a/drivers/sbus/char/bpp.c b/drivers/sbus/char/bpp.c
new file mode 100644
index 00000000000..8f0f46907a8
--- /dev/null
+++ b/drivers/sbus/char/bpp.c
@@ -0,0 +1,1079 @@
1/*
2 * drivers/sbus/char/bpp.c
3 *
4 * Copyright (c) 1995 Picture Elements
5 * Stephen Williams (steve@icarus.com)
6 * Gus Baldauf (gbaldauf@ix.netcom.com)
7 *
8 * Linux/SPARC port by Peter Zaitcev.
9 * Integration into SPARC tree by Tom Dyas.
10 */
11
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/fs.h>
16#include <linux/errno.h>
17#include <linux/sched.h>
18#include <linux/smp_lock.h>
19#include <linux/spinlock.h>
20#include <linux/timer.h>
21#include <linux/ioport.h>
22#include <linux/major.h>
23#include <linux/devfs_fs_kernel.h>
24
25#include <asm/uaccess.h>
26#include <asm/io.h>
27
28#if defined(__i386__)
29# include <asm/system.h>
30#endif
31
32#if defined(__sparc__)
33# include <linux/init.h>
34# include <linux/delay.h> /* udelay() */
35
36# include <asm/oplib.h> /* OpenProm Library */
37# include <asm/sbus.h>
38#endif
39
40#include <asm/bpp.h>
41
42#define BPP_PROBE_CODE 0x55
43#define BPP_DELAY 100
44
45static const unsigned BPP_MAJOR = LP_MAJOR;
46static const char* dev_name = "bpp";
47
48/* When switching from compatibility to a mode where I can read, try
49 the following mode first. */
50
51/* const unsigned char DEFAULT_ECP = 0x10; */
52static const unsigned char DEFAULT_ECP = 0x30;
53static const unsigned char DEFAULT_NIBBLE = 0x00;
54
55/*
56 * These are 1284 time constraints, in units of jiffies.
57 */
58
59static const unsigned long TIME_PSetup = 1;
60static const unsigned long TIME_PResponse = 6;
61static const unsigned long TIME_IDLE_LIMIT = 2000;
62
63/*
64 * One instance per supported subdevice...
65 */
66# define BPP_NO 3
67
68enum IEEE_Mode { COMPATIBILITY, NIBBLE, ECP, ECP_RLE, EPP };
69
70struct inst {
71 unsigned present : 1; /* True if the hardware exists */
72 unsigned enhanced : 1; /* True if the hardware in "enhanced" */
73 unsigned opened : 1; /* True if the device is opened already */
74 unsigned run_flag : 1; /* True if waiting for a repeate byte */
75
76 unsigned char direction; /* 0 --> out, 0x20 --> IN */
77 unsigned char pp_state; /* State of host controlled pins. */
78 enum IEEE_Mode mode;
79
80 unsigned char run_length;
81 unsigned char repeat_byte;
82
83 /* These members manage timeouts for programmed delays */
84 wait_queue_head_t wait_queue;
85 struct timer_list timer_list;
86};
87
88static struct inst instances[BPP_NO];
89
90#if defined(__i386__)
91
92static const unsigned short base_addrs[BPP_NO] = { 0x278, 0x378, 0x3bc };
93
94/*
95 * These are for data access.
96 * Control lines accesses are hidden in set_bits() and get_bits().
97 * The exception is the probe procedure, which is system-dependent.
98 */
99#define bpp_outb_p(data, base) outb_p((data), (base))
100#define bpp_inb(base) inb(base)
101#define bpp_inb_p(base) inb_p(base)
102
103/*
104 * This method takes the pin values mask and sets the hardware pins to
105 * the requested value: 1 == high voltage, 0 == low voltage. This
106 * burries the annoying PC bit inversion and preserves the direction
107 * flag.
108 */
109static void set_pins(unsigned short pins, unsigned minor)
110{
111 unsigned char bits = instances[minor].direction; /* == 0x20 */
112
113 if (! (pins & BPP_PP_nStrobe)) bits |= 1;
114 if (! (pins & BPP_PP_nAutoFd)) bits |= 2;
115 if ( pins & BPP_PP_nInit) bits |= 4;
116 if (! (pins & BPP_PP_nSelectIn)) bits |= 8;
117
118 instances[minor].pp_state = bits;
119
120 outb_p(bits, base_addrs[minor]+2);
121}
122
123static unsigned short get_pins(unsigned minor)
124{
125 unsigned short bits = 0;
126
127 unsigned value = instances[minor].pp_state;
128 if (! (value & 0x01)) bits |= BPP_PP_nStrobe;
129 if (! (value & 0x02)) bits |= BPP_PP_nAutoFd;
130 if (value & 0x04) bits |= BPP_PP_nInit;
131 if (! (value & 0x08)) bits |= BPP_PP_nSelectIn;
132
133 value = inb_p(base_addrs[minor]+1);
134 if (value & 0x08) bits |= BPP_GP_nFault;
135 if (value & 0x10) bits |= BPP_GP_Select;
136 if (value & 0x20) bits |= BPP_GP_PError;
137 if (value & 0x40) bits |= BPP_GP_nAck;
138 if (! (value & 0x80)) bits |= BPP_GP_Busy;
139
140 return bits;
141}
142
143#endif /* __i386__ */
144
145#if defined(__sparc__)
146
147/*
148 * Register block
149 */
150 /* DMA registers */
151#define BPP_CSR 0x00
152#define BPP_ADDR 0x04
153#define BPP_BCNT 0x08
154#define BPP_TST_CSR 0x0C
155 /* Parallel Port registers */
156#define BPP_HCR 0x10
157#define BPP_OCR 0x12
158#define BPP_DR 0x14
159#define BPP_TCR 0x15
160#define BPP_OR 0x16
161#define BPP_IR 0x17
162#define BPP_ICR 0x18
163#define BPP_SIZE 0x1A
164
165/* BPP_CSR. Bits of type RW1 are cleared with writting '1'. */
166#define P_DEV_ID_MASK 0xf0000000 /* R */
167#define P_DEV_ID_ZEBRA 0x40000000
168#define P_DEV_ID_L64854 0xa0000000 /* == NCR 89C100+89C105. Pity. */
169#define P_NA_LOADED 0x08000000 /* R NA wirtten but was not used */
170#define P_A_LOADED 0x04000000 /* R */
171#define P_DMA_ON 0x02000000 /* R DMA is not disabled */
172#define P_EN_NEXT 0x01000000 /* RW */
173#define P_TCI_DIS 0x00800000 /* RW TCI forbidden from interrupts */
174#define P_DIAG 0x00100000 /* RW Disables draining and resetting
175 of P-FIFO on loading of P_ADDR*/
176#define P_BURST_SIZE 0x000c0000 /* RW SBus burst size */
177#define P_BURST_8 0x00000000
178#define P_BURST_4 0x00040000
179#define P_BURST_1 0x00080000 /* "No burst" write */
180#define P_TC 0x00004000 /* RW1 Term Count, can be cleared when
181 P_EN_NEXT=1 */
182#define P_EN_CNT 0x00002000 /* RW */
183#define P_EN_DMA 0x00000200 /* RW */
184#define P_WRITE 0x00000100 /* R DMA dir, 1=to ram, 0=to port */
185#define P_RESET 0x00000080 /* RW */
186#define P_SLAVE_ERR 0x00000040 /* RW1 Access size error */
187#define P_INVALIDATE 0x00000020 /* W Drop P-FIFO */
188#define P_INT_EN 0x00000010 /* RW OK to P_INT_PEND||P_ERR_PEND */
189#define P_DRAINING 0x0000000c /* R P-FIFO is draining to memory */
190#define P_ERR_PEND 0x00000002 /* R */
191#define P_INT_PEND 0x00000001 /* R */
192
193/* BPP_HCR. Time is in increments of SBus clock. */
194#define P_HCR_TEST 0x8000 /* Allows buried counters to be read */
195#define P_HCR_DSW 0x7f00 /* Data strobe width (in ticks) */
196#define P_HCR_DDS 0x007f /* Data setup before strobe (in ticks) */
197
198/* BPP_OCR. */
199#define P_OCR_MEM_CLR 0x8000
200#define P_OCR_DATA_SRC 0x4000 /* ) */
201#define P_OCR_DS_DSEL 0x2000 /* ) Bidirectional */
202#define P_OCR_BUSY_DSEL 0x1000 /* ) selects */
203#define P_OCR_ACK_DSEL 0x0800 /* ) */
204#define P_OCR_EN_DIAG 0x0400
205#define P_OCR_BUSY_OP 0x0200 /* Busy operation */
206#define P_OCR_ACK_OP 0x0100 /* Ack operation */
207#define P_OCR_SRST 0x0080 /* Reset state machines. Not selfcleaning. */
208#define P_OCR_IDLE 0x0008 /* PP data transfer state machine is idle */
209#define P_OCR_V_ILCK 0x0002 /* Versatec faded. Zebra only. */
210#define P_OCR_EN_VER 0x0001 /* Enable Versatec (0 - enable). Zebra only. */
211
212/* BPP_TCR */
213#define P_TCR_DIR 0x08
214#define P_TCR_BUSY 0x04
215#define P_TCR_ACK 0x02
216#define P_TCR_DS 0x01 /* Strobe */
217
218/* BPP_OR */
219#define P_OR_V3 0x20 /* ) */
220#define P_OR_V2 0x10 /* ) on Zebra only */
221#define P_OR_V1 0x08 /* ) */
222#define P_OR_INIT 0x04
223#define P_OR_AFXN 0x02 /* Auto Feed */
224#define P_OR_SLCT_IN 0x01
225
226/* BPP_IR */
227#define P_IR_PE 0x04
228#define P_IR_SLCT 0x02
229#define P_IR_ERR 0x01
230
231/* BPP_ICR */
232#define P_DS_IRQ 0x8000 /* RW1 */
233#define P_ACK_IRQ 0x4000 /* RW1 */
234#define P_BUSY_IRQ 0x2000 /* RW1 */
235#define P_PE_IRQ 0x1000 /* RW1 */
236#define P_SLCT_IRQ 0x0800 /* RW1 */
237#define P_ERR_IRQ 0x0400 /* RW1 */
238#define P_DS_IRQ_EN 0x0200 /* RW Always on rising edge */
239#define P_ACK_IRQ_EN 0x0100 /* RW Always on rising edge */
240#define P_BUSY_IRP 0x0080 /* RW 1= rising edge */
241#define P_BUSY_IRQ_EN 0x0040 /* RW */
242#define P_PE_IRP 0x0020 /* RW 1= rising edge */
243#define P_PE_IRQ_EN 0x0010 /* RW */
244#define P_SLCT_IRP 0x0008 /* RW 1= rising edge */
245#define P_SLCT_IRQ_EN 0x0004 /* RW */
246#define P_ERR_IRP 0x0002 /* RW1 1= rising edge */
247#define P_ERR_IRQ_EN 0x0001 /* RW */
248
249static void __iomem *base_addrs[BPP_NO];
250
251#define bpp_outb_p(data, base) sbus_writeb(data, (base) + BPP_DR)
252#define bpp_inb_p(base) sbus_readb((base) + BPP_DR)
253#define bpp_inb(base) sbus_readb((base) + BPP_DR)
254
255static void set_pins(unsigned short pins, unsigned minor)
256{
257 void __iomem *base = base_addrs[minor];
258 unsigned char bits_tcr = 0, bits_or = 0;
259
260 if (instances[minor].direction & 0x20) bits_tcr |= P_TCR_DIR;
261 if ( pins & BPP_PP_nStrobe) bits_tcr |= P_TCR_DS;
262
263 if ( pins & BPP_PP_nAutoFd) bits_or |= P_OR_AFXN;
264 if (! (pins & BPP_PP_nInit)) bits_or |= P_OR_INIT;
265 if (! (pins & BPP_PP_nSelectIn)) bits_or |= P_OR_SLCT_IN;
266
267 sbus_writeb(bits_or, base + BPP_OR);
268 sbus_writeb(bits_tcr, base + BPP_TCR);
269}
270
271/*
272 * i386 people read output pins from a software image.
273 * We may get them back from hardware.
274 * Again, inversion of pins must he buried here.
275 */
276static unsigned short get_pins(unsigned minor)
277{
278 void __iomem *base = base_addrs[minor];
279 unsigned short bits = 0;
280 unsigned value_tcr = sbus_readb(base + BPP_TCR);
281 unsigned value_ir = sbus_readb(base + BPP_IR);
282 unsigned value_or = sbus_readb(base + BPP_OR);
283
284 if (value_tcr & P_TCR_DS) bits |= BPP_PP_nStrobe;
285 if (value_or & P_OR_AFXN) bits |= BPP_PP_nAutoFd;
286 if (! (value_or & P_OR_INIT)) bits |= BPP_PP_nInit;
287 if (! (value_or & P_OR_SLCT_IN)) bits |= BPP_PP_nSelectIn;
288
289 if (value_ir & P_IR_ERR) bits |= BPP_GP_nFault;
290 if (! (value_ir & P_IR_SLCT)) bits |= BPP_GP_Select;
291 if (! (value_ir & P_IR_PE)) bits |= BPP_GP_PError;
292 if (! (value_tcr & P_TCR_ACK)) bits |= BPP_GP_nAck;
293 if (value_tcr & P_TCR_BUSY) bits |= BPP_GP_Busy;
294
295 return bits;
296}
297
298#endif /* __sparc__ */
299
300static void bpp_wake_up(unsigned long val)
301{ wake_up(&instances[val].wait_queue); }
302
303static void snooze(unsigned long snooze_time, unsigned minor)
304{
305 init_timer(&instances[minor].timer_list);
306 instances[minor].timer_list.expires = jiffies + snooze_time + 1;
307 instances[minor].timer_list.data = minor;
308 add_timer(&instances[minor].timer_list);
309 sleep_on (&instances[minor].wait_queue);
310}
311
312static int wait_for(unsigned short set, unsigned short clr,
313 unsigned long delay, unsigned minor)
314{
315 unsigned short pins = get_pins(minor);
316
317 unsigned long extime = 0;
318
319 /*
320 * Try a real fast scan for the first jiffy, in case the device
321 * responds real good. The first while loop guesses an expire
322 * time accounting for possible wraparound of jiffies.
323 */
324 while (time_after_eq(jiffies, extime)) extime = jiffies + 1;
325 while ( (time_before(jiffies, extime))
326 && (((pins & set) != set) || ((pins & clr) != 0)) ) {
327 pins = get_pins(minor);
328 }
329
330 delay -= 1;
331
332 /*
333 * If my delay expired or the pins are still not where I want
334 * them, then resort to using the timer and greatly reduce my
335 * sample rate. If the peripheral is going to be slow, this will
336 * give the CPU up to some more worthy process.
337 */
338 while ( delay && (((pins & set) != set) || ((pins & clr) != 0)) ) {
339
340 snooze(1, minor);
341 pins = get_pins(minor);
342 delay -= 1;
343 }
344
345 if (delay == 0) return -1;
346 else return pins;
347}
348
349/*
350 * Return ZERO(0) If the negotiation succeeds, an errno otherwise. An
351 * errno means something broke, and I do not yet know how to fix it.
352 */
353static int negotiate(unsigned char mode, unsigned minor)
354{
355 int rc;
356 unsigned short pins = get_pins(minor);
357 if (pins & BPP_PP_nSelectIn) return -EIO;
358
359
360 /* Event 0: Write the mode to the data lines */
361 bpp_outb_p(mode, base_addrs[minor]);
362
363 snooze(TIME_PSetup, minor);
364
365 /* Event 1: Strobe the mode code into the peripheral */
366 set_pins(BPP_PP_nSelectIn|BPP_PP_nStrobe|BPP_PP_nInit, minor);
367
368 /* Wait for Event 2: Peripheral responds as a 1284 device. */
369 rc = wait_for(BPP_GP_PError|BPP_GP_Select|BPP_GP_nFault,
370 BPP_GP_nAck,
371 TIME_PResponse,
372 minor);
373
374 if (rc == -1) return -ETIMEDOUT;
375
376 /* Event 3: latch extensibility request */
377 set_pins(BPP_PP_nSelectIn|BPP_PP_nInit, minor);
378
379 /* ... quick nap while peripheral ponders the byte i'm sending...*/
380 snooze(1, minor);
381
382 /* Event 4: restore strobe, to ACK peripheral's response. */
383 set_pins(BPP_PP_nSelectIn|BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, minor);
384
385 /* Wait for Event 6: Peripheral latches response bits */
386 rc = wait_for(BPP_GP_nAck, 0, TIME_PSetup+TIME_PResponse, minor);
387 if (rc == -1) return -EIO;
388
389 /* A 1284 device cannot refuse nibble mode */
390 if (mode == DEFAULT_NIBBLE) return 0;
391
392 if (pins & BPP_GP_Select) return 0;
393
394 return -EPROTONOSUPPORT;
395}
396
397static int terminate(unsigned minor)
398{
399 int rc;
400
401 /* Event 22: Request termination of 1284 mode */
402 set_pins(BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, minor);
403
404 /* Wait for Events 23 and 24: ACK termination request. */
405 rc = wait_for(BPP_GP_Busy|BPP_GP_nFault,
406 BPP_GP_nAck,
407 TIME_PSetup+TIME_PResponse,
408 minor);
409
410 instances[minor].direction = 0;
411 instances[minor].mode = COMPATIBILITY;
412
413 if (rc == -1) {
414 return -EIO;
415 }
416
417 /* Event 25: Handshake by lowering nAutoFd */
418 set_pins(BPP_PP_nStrobe|BPP_PP_nInit, minor);
419
420 /* Event 26: Peripheral wiggles lines... */
421
422 /* Event 27: Peripheral sets nAck HIGH to ack handshake */
423 rc = wait_for(BPP_GP_nAck, 0, TIME_PResponse, minor);
424 if (rc == -1) {
425 set_pins(BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, minor);
426 return -EIO;
427 }
428
429 /* Event 28: Finish phase by raising nAutoFd */
430 set_pins(BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, minor);
431
432 return 0;
433}
434
435static DEFINE_SPINLOCK(bpp_open_lock);
436
437/*
438 * Allow only one process to open the device at a time.
439 */
440static int bpp_open(struct inode *inode, struct file *f)
441{
442 unsigned minor = iminor(inode);
443 int ret;
444
445 spin_lock(&bpp_open_lock);
446 ret = 0;
447 if (minor >= BPP_NO) {
448 ret = -ENODEV;
449 } else {
450 if (! instances[minor].present) {
451 ret = -ENODEV;
452 } else {
453 if (instances[minor].opened)
454 ret = -EBUSY;
455 else
456 instances[minor].opened = 1;
457 }
458 }
459 spin_unlock(&bpp_open_lock);
460
461 return ret;
462}
463
464/*
465 * When the process closes the device, this method is called to clean
466 * up and reset the hardware. Always leave the device in compatibility
467 * mode as this is a reasonable place to clean up from messes made by
468 * ioctls, or other mayhem.
469 */
470static int bpp_release(struct inode *inode, struct file *f)
471{
472 unsigned minor = iminor(inode);
473
474 spin_lock(&bpp_open_lock);
475 instances[minor].opened = 0;
476
477 if (instances[minor].mode != COMPATIBILITY)
478 terminate(minor);
479
480 spin_unlock(&bpp_open_lock);
481
482 return 0;
483}
484
485static long read_nibble(unsigned minor, char __user *c, unsigned long cnt)
486{
487 unsigned long remaining = cnt;
488 long rc;
489
490 while (remaining > 0) {
491 unsigned char byte = 0;
492 int pins;
493
494 /* Event 7: request nibble */
495 set_pins(BPP_PP_nSelectIn|BPP_PP_nStrobe, minor);
496
497 /* Wait for event 9: Peripher strobes first nibble */
498 pins = wait_for(0, BPP_GP_nAck, TIME_IDLE_LIMIT, minor);
499 if (pins == -1) return -ETIMEDOUT;
500
501 /* Event 10: I handshake nibble */
502 set_pins(BPP_PP_nSelectIn|BPP_PP_nStrobe|BPP_PP_nAutoFd, minor);
503 if (pins & BPP_GP_nFault) byte |= 0x01;
504 if (pins & BPP_GP_Select) byte |= 0x02;
505 if (pins & BPP_GP_PError) byte |= 0x04;
506 if (pins & BPP_GP_Busy) byte |= 0x08;
507
508 /* Wait for event 11: Peripheral handshakes nibble */
509 rc = wait_for(BPP_GP_nAck, 0, TIME_PResponse, minor);
510
511 /* Event 7: request nibble */
512 set_pins(BPP_PP_nSelectIn|BPP_PP_nStrobe, minor);
513
514 /* Wait for event 9: Peripher strobes first nibble */
515 pins = wait_for(0, BPP_GP_nAck, TIME_PResponse, minor);
516 if (rc == -1) return -ETIMEDOUT;
517
518 /* Event 10: I handshake nibble */
519 set_pins(BPP_PP_nSelectIn|BPP_PP_nStrobe|BPP_PP_nAutoFd, minor);
520 if (pins & BPP_GP_nFault) byte |= 0x10;
521 if (pins & BPP_GP_Select) byte |= 0x20;
522 if (pins & BPP_GP_PError) byte |= 0x40;
523 if (pins & BPP_GP_Busy) byte |= 0x80;
524
525 if (put_user(byte, c))
526 return -EFAULT;
527 c += 1;
528 remaining -= 1;
529
530 /* Wait for event 11: Peripheral handshakes nibble */
531 rc = wait_for(BPP_GP_nAck, 0, TIME_PResponse, minor);
532 if (rc == -1) return -EIO;
533 }
534
535 return cnt - remaining;
536}
537
538static long read_ecp(unsigned minor, char __user *c, unsigned long cnt)
539{
540 unsigned long remaining;
541 long rc;
542
543 /* Turn ECP mode from forward to reverse if needed. */
544 if (! instances[minor].direction) {
545 unsigned short pins = get_pins(minor);
546
547 /* Event 38: Turn the bus around */
548 instances[minor].direction = 0x20;
549 pins &= ~BPP_PP_nAutoFd;
550 set_pins(pins, minor);
551
552 /* Event 39: Set pins for reverse mode. */
553 snooze(TIME_PSetup, minor);
554 set_pins(BPP_PP_nStrobe|BPP_PP_nSelectIn, minor);
555
556 /* Wait for event 40: Peripheral ready to be strobed */
557 rc = wait_for(0, BPP_GP_PError, TIME_PResponse, minor);
558 if (rc == -1) return -ETIMEDOUT;
559 }
560
561 remaining = cnt;
562
563 while (remaining > 0) {
564
565 /* If there is a run length for a repeated byte, repeat */
566 /* that byte a few times. */
567 if (instances[minor].run_length && !instances[minor].run_flag) {
568
569 char buffer[128];
570 unsigned idx;
571 unsigned repeat = remaining < instances[minor].run_length
572 ? remaining
573 : instances[minor].run_length;
574
575 for (idx = 0 ; idx < repeat ; idx += 1)
576 buffer[idx] = instances[minor].repeat_byte;
577
578 if (copy_to_user(c, buffer, repeat))
579 return -EFAULT;
580 remaining -= repeat;
581 c += repeat;
582 instances[minor].run_length -= repeat;
583 }
584
585 if (remaining == 0) break;
586
587
588 /* Wait for Event 43: Data active on the bus. */
589 rc = wait_for(0, BPP_GP_nAck, TIME_IDLE_LIMIT, minor);
590 if (rc == -1) break;
591
592 if (rc & BPP_GP_Busy) {
593 /* OK, this is data. read it in. */
594 unsigned char byte = bpp_inb(base_addrs[minor]);
595 if (put_user(byte, c))
596 return -EFAULT;
597 c += 1;
598 remaining -= 1;
599
600 if (instances[minor].run_flag) {
601 instances[minor].repeat_byte = byte;
602 instances[minor].run_flag = 0;
603 }
604
605 } else {
606 unsigned char byte = bpp_inb(base_addrs[minor]);
607 if (byte & 0x80) {
608 printk("bpp%d: "
609 "Ignoring ECP channel %u from device.\n",
610 minor, byte & 0x7f);
611 } else {
612 instances[minor].run_length = byte;
613 instances[minor].run_flag = 1;
614 }
615 }
616
617 /* Event 44: I got it. */
618 set_pins(BPP_PP_nStrobe|BPP_PP_nAutoFd|BPP_PP_nSelectIn, minor);
619
620 /* Wait for event 45: peripheral handshake */
621 rc = wait_for(BPP_GP_nAck, 0, TIME_PResponse, minor);
622 if (rc == -1) return -ETIMEDOUT;
623
624 /* Event 46: Finish handshake */
625 set_pins(BPP_PP_nStrobe|BPP_PP_nSelectIn, minor);
626
627 }
628
629
630 return cnt - remaining;
631}
632
633static ssize_t bpp_read(struct file *f, char __user *c, size_t cnt, loff_t * ppos)
634{
635 long rc;
636 unsigned minor = iminor(f->f_dentry->d_inode);
637 if (minor >= BPP_NO) return -ENODEV;
638 if (!instances[minor].present) return -ENODEV;
639
640 switch (instances[minor].mode) {
641
642 default:
643 if (instances[minor].mode != COMPATIBILITY)
644 terminate(minor);
645
646 if (instances[minor].enhanced) {
647 /* For now, do all reads with ECP-RLE mode */
648 unsigned short pins;
649
650 rc = negotiate(DEFAULT_ECP, minor);
651 if (rc < 0) break;
652
653 instances[minor].mode = ECP_RLE;
654
655 /* Event 30: set nAutoFd low to setup for ECP mode */
656 pins = get_pins(minor);
657 pins &= ~BPP_PP_nAutoFd;
658 set_pins(pins, minor);
659
660 /* Wait for Event 31: peripheral ready */
661 rc = wait_for(BPP_GP_PError, 0, TIME_PResponse, minor);
662 if (rc == -1) return -ETIMEDOUT;
663
664 rc = read_ecp(minor, c, cnt);
665
666 } else {
667 rc = negotiate(DEFAULT_NIBBLE, minor);
668 if (rc < 0) break;
669
670 instances[minor].mode = NIBBLE;
671
672 rc = read_nibble(minor, c, cnt);
673 }
674 break;
675
676 case NIBBLE:
677 rc = read_nibble(minor, c, cnt);
678 break;
679
680 case ECP:
681 case ECP_RLE:
682 rc = read_ecp(minor, c, cnt);
683 break;
684
685 }
686
687
688 return rc;
689}
690
691/*
692 * Compatibility mode handshaking is a matter of writing data,
693 * strobing it, and waiting for the printer to stop being busy.
694 */
695static long write_compat(unsigned minor, const char __user *c, unsigned long cnt)
696{
697 long rc;
698 unsigned short pins = get_pins(minor);
699
700 unsigned long remaining = cnt;
701
702
703 while (remaining > 0) {
704 unsigned char byte;
705
706 if (get_user(byte, c))
707 return -EFAULT;
708 c += 1;
709
710 rc = wait_for(BPP_GP_nAck, BPP_GP_Busy, TIME_IDLE_LIMIT, minor);
711 if (rc == -1) return -ETIMEDOUT;
712
713 bpp_outb_p(byte, base_addrs[minor]);
714 remaining -= 1;
715 /* snooze(1, minor); */
716
717 pins &= ~BPP_PP_nStrobe;
718 set_pins(pins, minor);
719
720 rc = wait_for(BPP_GP_Busy, 0, TIME_PResponse, minor);
721
722 pins |= BPP_PP_nStrobe;
723 set_pins(pins, minor);
724 }
725
726 return cnt - remaining;
727}
728
729/*
730 * Write data using ECP mode. Watch out that the port may be set up
731 * for reading. If so, turn the port around.
732 */
733static long write_ecp(unsigned minor, const char __user *c, unsigned long cnt)
734{
735 unsigned short pins = get_pins(minor);
736 unsigned long remaining = cnt;
737
738 if (instances[minor].direction) {
739 int rc;
740
741 /* Event 47 Request bus be turned around */
742 pins |= BPP_PP_nInit;
743 set_pins(pins, minor);
744
745 /* Wait for Event 49: Peripheral relinquished bus */
746 rc = wait_for(BPP_GP_PError, 0, TIME_PResponse, minor);
747
748 pins |= BPP_PP_nAutoFd;
749 instances[minor].direction = 0;
750 set_pins(pins, minor);
751 }
752
753 while (remaining > 0) {
754 unsigned char byte;
755 int rc;
756
757 if (get_user(byte, c))
758 return -EFAULT;
759
760 rc = wait_for(0, BPP_GP_Busy, TIME_PResponse, minor);
761 if (rc == -1) return -ETIMEDOUT;
762
763 c += 1;
764
765 bpp_outb_p(byte, base_addrs[minor]);
766
767 pins &= ~BPP_PP_nStrobe;
768 set_pins(pins, minor);
769
770 pins |= BPP_PP_nStrobe;
771 rc = wait_for(BPP_GP_Busy, 0, TIME_PResponse, minor);
772 if (rc == -1) return -EIO;
773
774 set_pins(pins, minor);
775 }
776
777 return cnt - remaining;
778}
779
780/*
781 * Write to the peripheral. Be sensitive of the current mode. If I'm
782 * in a mode that can be turned around (ECP) then just do
783 * that. Otherwise, terminate and do my writing in compat mode. This
784 * is the safest course as any device can handle it.
785 */
786static ssize_t bpp_write(struct file *f, const char __user *c, size_t cnt, loff_t * ppos)
787{
788 long errno = 0;
789 unsigned minor = iminor(f->f_dentry->d_inode);
790 if (minor >= BPP_NO) return -ENODEV;
791 if (!instances[minor].present) return -ENODEV;
792
793 switch (instances[minor].mode) {
794
795 case ECP:
796 case ECP_RLE:
797 errno = write_ecp(minor, c, cnt);
798 break;
799 case COMPATIBILITY:
800 errno = write_compat(minor, c, cnt);
801 break;
802 default:
803 terminate(minor);
804 errno = write_compat(minor, c, cnt);
805 }
806
807 return errno;
808}
809
810static int bpp_ioctl(struct inode *inode, struct file *f, unsigned int cmd,
811 unsigned long arg)
812{
813 int errno = 0;
814
815 unsigned minor = iminor(inode);
816 if (minor >= BPP_NO) return -ENODEV;
817 if (!instances[minor].present) return -ENODEV;
818
819
820 switch (cmd) {
821
822 case BPP_PUT_PINS:
823 set_pins(arg, minor);
824 break;
825
826 case BPP_GET_PINS:
827 errno = get_pins(minor);
828 break;
829
830 case BPP_PUT_DATA:
831 bpp_outb_p(arg, base_addrs[minor]);
832 break;
833
834 case BPP_GET_DATA:
835 errno = bpp_inb_p(base_addrs[minor]);
836 break;
837
838 case BPP_SET_INPUT:
839 if (arg)
840 if (instances[minor].enhanced) {
841 unsigned short bits = get_pins(minor);
842 instances[minor].direction = 0x20;
843 set_pins(bits, minor);
844 } else {
845 errno = -ENOTTY;
846 }
847 else {
848 unsigned short bits = get_pins(minor);
849 instances[minor].direction = 0x00;
850 set_pins(bits, minor);
851 }
852 break;
853
854 default:
855 errno = -EINVAL;
856 }
857
858 return errno;
859}
860
861static struct file_operations bpp_fops = {
862 .owner = THIS_MODULE,
863 .read = bpp_read,
864 .write = bpp_write,
865 .ioctl = bpp_ioctl,
866 .open = bpp_open,
867 .release = bpp_release,
868};
869
870#if defined(__i386__)
871
872#define collectLptPorts() {}
873
874static void probeLptPort(unsigned idx)
875{
876 unsigned int testvalue;
877 const unsigned short lpAddr = base_addrs[idx];
878
879 instances[idx].present = 0;
880 instances[idx].enhanced = 0;
881 instances[idx].direction = 0;
882 instances[idx].mode = COMPATIBILITY;
883 instances[idx].wait_queue = 0;
884 instances[idx].run_length = 0;
885 instances[idx].run_flag = 0;
886 init_timer(&instances[idx].timer_list);
887 instances[idx].timer_list.function = bpp_wake_up;
888 if (!request_region(lpAddr,3, dev_name)) return;
889
890 /*
891 * First, make sure the instance exists. Do this by writing to
892 * the data latch and reading the value back. If the port *is*
893 * present, test to see if it supports extended-mode
894 * operation. This will be required for IEEE1284 reverse
895 * transfers.
896 */
897
898 outb_p(BPP_PROBE_CODE, lpAddr);
899 for (testvalue=0; testvalue<BPP_DELAY; testvalue++)
900 ;
901 testvalue = inb_p(lpAddr);
902 if (testvalue == BPP_PROBE_CODE) {
903 unsigned save;
904 instances[idx].present = 1;
905
906 save = inb_p(lpAddr+2);
907 for (testvalue=0; testvalue<BPP_DELAY; testvalue++)
908 ;
909 outb_p(save|0x20, lpAddr+2);
910 for (testvalue=0; testvalue<BPP_DELAY; testvalue++)
911 ;
912 outb_p(~BPP_PROBE_CODE, lpAddr);
913 for (testvalue=0; testvalue<BPP_DELAY; testvalue++)
914 ;
915 testvalue = inb_p(lpAddr);
916 if ((testvalue&0xff) == (0xff&~BPP_PROBE_CODE))
917 instances[idx].enhanced = 0;
918 else
919 instances[idx].enhanced = 1;
920 outb_p(save, lpAddr+2);
921 }
922 else {
923 release_region(lpAddr,3);
924 }
925 /*
926 * Leave the port in compat idle mode.
927 */
928 set_pins(BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, idx);
929
930 printk("bpp%d: Port at 0x%03x: Enhanced mode %s\n", idx, base_addrs[idx],
931 instances[idx].enhanced? "SUPPORTED" : "UNAVAILABLE");
932}
933
934static inline void freeLptPort(int idx)
935{
936 release_region(base_addrs[idx], 3);
937}
938
939#endif
940
941#if defined(__sparc__)
942
943static void __iomem *map_bpp(struct sbus_dev *dev, int idx)
944{
945 return sbus_ioremap(&dev->resource[0], 0, BPP_SIZE, "bpp");
946}
947
948static int collectLptPorts(void)
949{
950 struct sbus_bus *bus;
951 struct sbus_dev *dev;
952 int count;
953
954 count = 0;
955 for_all_sbusdev(dev, bus) {
956 if (strcmp(dev->prom_name, "SUNW,bpp") == 0) {
957 if (count >= BPP_NO) {
958 printk(KERN_NOTICE
959 "bpp: More than %d bpp ports,"
960 " rest is ignored\n", BPP_NO);
961 return count;
962 }
963 base_addrs[count] = map_bpp(dev, count);
964 count++;
965 }
966 }
967 return count;
968}
969
970static void probeLptPort(unsigned idx)
971{
972 void __iomem *rp = base_addrs[idx];
973 __u32 csr;
974 char *brand;
975
976 instances[idx].present = 0;
977 instances[idx].enhanced = 0;
978 instances[idx].direction = 0;
979 instances[idx].mode = COMPATIBILITY;
980 init_waitqueue_head(&instances[idx].wait_queue);
981 instances[idx].run_length = 0;
982 instances[idx].run_flag = 0;
983 init_timer(&instances[idx].timer_list);
984 instances[idx].timer_list.function = bpp_wake_up;
985
986 if (!rp) return;
987
988 instances[idx].present = 1;
989 instances[idx].enhanced = 1; /* Sure */
990
991 csr = sbus_readl(rp + BPP_CSR);
992 if ((csr & P_DRAINING) != 0 && (csr & P_ERR_PEND) == 0) {
993 udelay(20);
994 csr = sbus_readl(rp + BPP_CSR);
995 if ((csr & P_DRAINING) != 0 && (csr & P_ERR_PEND) == 0) {
996 printk("bpp%d: DRAINING still active (0x%08x)\n", idx, csr);
997 }
998 }
999 printk("bpp%d: reset with 0x%08x ..", idx, csr);
1000 sbus_writel((csr | P_RESET) & ~P_INT_EN, rp + BPP_CSR);
1001 udelay(500);
1002 sbus_writel(sbus_readl(rp + BPP_CSR) & ~P_RESET, rp + BPP_CSR);
1003 csr = sbus_readl(rp + BPP_CSR);
1004 printk(" done with csr=0x%08x ocr=0x%04x\n",
1005 csr, sbus_readw(rp + BPP_OCR));
1006
1007 switch (csr & P_DEV_ID_MASK) {
1008 case P_DEV_ID_ZEBRA:
1009 brand = "Zebra";
1010 break;
1011 case P_DEV_ID_L64854:
1012 brand = "DMA2";
1013 break;
1014 default:
1015 brand = "Unknown";
1016 }
1017 printk("bpp%d: %s at %p\n", idx, brand, rp);
1018
1019 /*
1020 * Leave the port in compat idle mode.
1021 */
1022 set_pins(BPP_PP_nAutoFd|BPP_PP_nStrobe|BPP_PP_nInit, idx);
1023
1024 return;
1025}
1026
1027static inline void freeLptPort(int idx)
1028{
1029 sbus_iounmap(base_addrs[idx], BPP_SIZE);
1030}
1031
1032#endif
1033
1034static int __init bpp_init(void)
1035{
1036 int rc;
1037 unsigned idx;
1038
1039 rc = collectLptPorts();
1040 if (rc == 0)
1041 return -ENODEV;
1042
1043 rc = register_chrdev(BPP_MAJOR, dev_name, &bpp_fops);
1044 if (rc < 0)
1045 return rc;
1046
1047 for (idx = 0; idx < BPP_NO; idx++) {
1048 instances[idx].opened = 0;
1049 probeLptPort(idx);
1050 }
1051 devfs_mk_dir("bpp");
1052 for (idx = 0; idx < BPP_NO; idx++) {
1053 devfs_mk_cdev(MKDEV(BPP_MAJOR, idx),
1054 S_IFCHR | S_IRUSR | S_IWUSR, "bpp/%d", idx);
1055 }
1056
1057 return 0;
1058}
1059
1060static void __exit bpp_cleanup(void)
1061{
1062 unsigned idx;
1063
1064 for (idx = 0; idx < BPP_NO; idx++)
1065 devfs_remove("bpp/%d", idx);
1066 devfs_remove("bpp");
1067 unregister_chrdev(BPP_MAJOR, dev_name);
1068
1069 for (idx = 0; idx < BPP_NO; idx++) {
1070 if (instances[idx].present)
1071 freeLptPort(idx);
1072 }
1073}
1074
1075module_init(bpp_init);
1076module_exit(bpp_cleanup);
1077
1078MODULE_LICENSE("GPL");
1079
diff --git a/drivers/sbus/char/cd180.h b/drivers/sbus/char/cd180.h
new file mode 100644
index 00000000000..445b86cc65e
--- /dev/null
+++ b/drivers/sbus/char/cd180.h
@@ -0,0 +1,240 @@
1
2/* Definitions for Cirrus Logic CL-CD180 8-port async mux chip */
3#define CD180_NCH 8 /* Total number of channels */
4#define CD180_TPC 16 /* Ticks per character */
5#define CD180_NFIFO 8 /* TX FIFO size */
6
7/* Global registers */
8#define CD180_GFRCR 0x6b /* Global Firmware Revision Code Register */
9#define CD180_SRCR 0x66 /* Service Request Configuration Register */
10#define CD180_PPRH 0x70 /* Prescaler Period Register High */
11#define CD180_PPRL 0x71 /* Prescaler Period Register Low */
12#define CD180_MSMR 0x61 /* Modem Service Match Register */
13#define CD180_TSMR 0x62 /* Transmit Service Match Register */
14#define CD180_RSMR 0x63 /* Receive Service Match Register */
15#define CD180_GSVR 0x40 /* Global Service Vector Register */
16#define CD180_SRSR 0x65 /* Service Request Status Register */
17#define CD180_GSCR 0x41 /* Global Service Channel Register */
18#define CD180_CAR 0x64 /* Channel Access Register */
19
20/* Indexed registers */
21#define CD180_RDCR 0x07 /* Receive Data Count Register */
22#define CD180_RDR 0x78 /* Receiver Data Register */
23#define CD180_RCSR 0x7a /* Receiver Character Status Register */
24#define CD180_TDR 0x7b /* Transmit Data Register */
25#define CD180_EOSRR 0x7f /* End of Service Request Register */
26
27/* Channel Registers */
28#define CD180_SRER 0x02 /* Service Request Enable Register */
29#define CD180_CCR 0x01 /* Channel Command Register */
30#define CD180_COR1 0x03 /* Channel Option Register 1 */
31#define CD180_COR2 0x04 /* Channel Option Register 2 */
32#define CD180_COR3 0x05 /* Channel Option Register 3 */
33#define CD180_CCSR 0x06 /* Channel Control Status Register */
34#define CD180_RTPR 0x18 /* Receive Timeout Period Register */
35#define CD180_RBPRH 0x31 /* Receive Bit Rate Period Register High */
36#define CD180_RBPRL 0x32 /* Receive Bit Rate Period Register Low */
37#define CD180_TBPRH 0x39 /* Transmit Bit Rate Period Register High */
38#define CD180_TBPRL 0x3a /* Transmit Bit Rate Period Register Low */
39#define CD180_SCHR1 0x09 /* Special Character Register 1 */
40#define CD180_SCHR2 0x0a /* Special Character Register 2 */
41#define CD180_SCHR3 0x0b /* Special Character Register 3 */
42#define CD180_SCHR4 0x0c /* Special Character Register 4 */
43#define CD180_MCR 0x12 /* Modem Change Register */
44#define CD180_MCOR1 0x10 /* Modem Change Option 1 Register */
45#define CD180_MCOR2 0x11 /* Modem Change Option 2 Register */
46#define CD180_MSVR 0x28 /* Modem Signal Value Register */
47#define CD180_MSVRTS 0x29 /* Modem Signal Value RTS */
48#define CD180_MSVDTR 0x2a /* Modem Signal Value DTR */
49
50/* Global Interrupt Vector Register (R/W) */
51
52#define GSVR_ITMASK 0x07 /* Interrupt type mask */
53#define GSVR_IT_MDM 0x01 /* Modem Signal Change Interrupt */
54#define GSVR_IT_TX 0x02 /* Transmit Data Interrupt */
55#define GSVR_IT_RGD 0x03 /* Receive Good Data Interrupt */
56#define GSVR_IT_REXC 0x07 /* Receive Exception Interrupt */
57
58
59/* Global Interrupt Channel Register (R/W) */
60
61#define GSCR_CHAN 0x1c /* Channel Number Mask */
62#define GSCR_CHAN_OFF 2 /* Channel Number Offset */
63
64
65/* Channel Address Register (R/W) */
66
67#define CAR_CHAN 0x07 /* Channel Number Mask */
68
69
70/* Receive Character Status Register (R/O) */
71
72#define RCSR_TOUT 0x80 /* Rx Timeout */
73#define RCSR_SCDET 0x70 /* Special Character Detected Mask */
74#define RCSR_NO_SC 0x00 /* No Special Characters Detected */
75#define RCSR_SC_1 0x10 /* Special Char 1 (or 1 & 3) Detected */
76#define RCSR_SC_2 0x20 /* Special Char 2 (or 2 & 4) Detected */
77#define RCSR_SC_3 0x30 /* Special Char 3 Detected */
78#define RCSR_SC_4 0x40 /* Special Char 4 Detected */
79#define RCSR_BREAK 0x08 /* Break has been detected */
80#define RCSR_PE 0x04 /* Parity Error */
81#define RCSR_FE 0x02 /* Frame Error */
82#define RCSR_OE 0x01 /* Overrun Error */
83
84
85/* Channel Command Register (R/W) (commands in groups can be OR-ed) */
86
87#define CCR_HARDRESET 0x81 /* Reset the chip */
88
89#define CCR_SOFTRESET 0x80 /* Soft Channel Reset */
90
91#define CCR_CORCHG1 0x42 /* Channel Option Register 1 Changed */
92#define CCR_CORCHG2 0x44 /* Channel Option Register 2 Changed */
93#define CCR_CORCHG3 0x48 /* Channel Option Register 3 Changed */
94
95#define CCR_SSCH1 0x21 /* Send Special Character 1 */
96
97#define CCR_SSCH2 0x22 /* Send Special Character 2 */
98
99#define CCR_SSCH3 0x23 /* Send Special Character 3 */
100
101#define CCR_SSCH4 0x24 /* Send Special Character 4 */
102
103#define CCR_TXEN 0x18 /* Enable Transmitter */
104#define CCR_RXEN 0x12 /* Enable Receiver */
105
106#define CCR_TXDIS 0x14 /* Disable Transmitter */
107#define CCR_RXDIS 0x11 /* Disable Receiver */
108
109
110/* Service Request Enable Register (R/W) */
111
112#define SRER_DSR 0x80 /* Enable interrupt on DSR change */
113#define SRER_CD 0x40 /* Enable interrupt on CD change */
114#define SRER_CTS 0x20 /* Enable interrupt on CTS change */
115#define SRER_RXD 0x10 /* Enable interrupt on Receive Data */
116#define SRER_RXSC 0x08 /* Enable interrupt on Receive Spec. Char */
117#define SRER_TXRDY 0x04 /* Enable interrupt on TX FIFO empty */
118#define SRER_TXEMPTY 0x02 /* Enable interrupt on TX completely empty */
119#define SRER_RET 0x01 /* Enable interrupt on RX Exc. Timeout */
120
121
122/* Channel Option Register 1 (R/W) */
123
124#define COR1_ODDP 0x80 /* Odd Parity */
125#define COR1_PARMODE 0x60 /* Parity Mode mask */
126#define COR1_NOPAR 0x00 /* No Parity */
127#define COR1_FORCEPAR 0x20 /* Force Parity */
128#define COR1_NORMPAR 0x40 /* Normal Parity */
129#define COR1_IGNORE 0x10 /* Ignore Parity on RX */
130#define COR1_STOPBITS 0x0c /* Number of Stop Bits */
131#define COR1_1SB 0x00 /* 1 Stop Bit */
132#define COR1_15SB 0x04 /* 1.5 Stop Bits */
133#define COR1_2SB 0x08 /* 2 Stop Bits */
134#define COR1_CHARLEN 0x03 /* Character Length */
135#define COR1_5BITS 0x00 /* 5 bits */
136#define COR1_6BITS 0x01 /* 6 bits */
137#define COR1_7BITS 0x02 /* 7 bits */
138#define COR1_8BITS 0x03 /* 8 bits */
139
140
141/* Channel Option Register 2 (R/W) */
142
143#define COR2_IXM 0x80 /* Implied XON mode */
144#define COR2_TXIBE 0x40 /* Enable In-Band (XON/XOFF) Flow Control */
145#define COR2_ETC 0x20 /* Embedded Tx Commands Enable */
146#define COR2_LLM 0x10 /* Local Loopback Mode */
147#define COR2_RLM 0x08 /* Remote Loopback Mode */
148#define COR2_RTSAO 0x04 /* RTS Automatic Output Enable */
149#define COR2_CTSAE 0x02 /* CTS Automatic Enable */
150#define COR2_DSRAE 0x01 /* DSR Automatic Enable */
151
152
153/* Channel Option Register 3 (R/W) */
154
155#define COR3_XONCH 0x80 /* XON is a pair of characters (1 & 3) */
156#define COR3_XOFFCH 0x40 /* XOFF is a pair of characters (2 & 4) */
157#define COR3_FCT 0x20 /* Flow-Control Transparency Mode */
158#define COR3_SCDE 0x10 /* Special Character Detection Enable */
159#define COR3_RXTH 0x0f /* RX FIFO Threshold value (1-8) */
160
161
162/* Channel Control Status Register (R/O) */
163
164#define CCSR_RXEN 0x80 /* Receiver Enabled */
165#define CCSR_RXFLOFF 0x40 /* Receive Flow Off (XOFF was sent) */
166#define CCSR_RXFLON 0x20 /* Receive Flow On (XON was sent) */
167#define CCSR_TXEN 0x08 /* Transmitter Enabled */
168#define CCSR_TXFLOFF 0x04 /* Transmit Flow Off (got XOFF) */
169#define CCSR_TXFLON 0x02 /* Transmit Flow On (got XON) */
170
171
172/* Modem Change Option Register 1 (R/W) */
173
174#define MCOR1_DSRZD 0x80 /* Detect 0->1 transition of DSR */
175#define MCOR1_CDZD 0x40 /* Detect 0->1 transition of CD */
176#define MCOR1_CTSZD 0x20 /* Detect 0->1 transition of CTS */
177#define MCOR1_DTRTH 0x0f /* Auto DTR flow control Threshold (1-8) */
178#define MCOR1_NODTRFC 0x0 /* Automatic DTR flow control disabled */
179
180
181/* Modem Change Option Register 2 (R/W) */
182
183#define MCOR2_DSROD 0x80 /* Detect 1->0 transition of DSR */
184#define MCOR2_CDOD 0x40 /* Detect 1->0 transition of CD */
185#define MCOR2_CTSOD 0x20 /* Detect 1->0 transition of CTS */
186
187
188/* Modem Change Register (R/W) */
189
190#define MCR_DSRCHG 0x80 /* DSR Changed */
191#define MCR_CDCHG 0x40 /* CD Changed */
192#define MCR_CTSCHG 0x20 /* CTS Changed */
193
194
195/* Modem Signal Value Register (R/W) */
196
197#define MSVR_DSR 0x80 /* Current state of DSR input */
198#define MSVR_CD 0x40 /* Current state of CD input */
199#define MSVR_CTS 0x20 /* Current state of CTS input */
200#define MSVR_DTR 0x02 /* Current state of DTR output */
201#define MSVR_RTS 0x01 /* Current state of RTS output */
202
203
204/* Service Request Status Register */
205
206#define SRSR_CMASK 0xC0 /* Current Service Context Mask */
207#define SRSR_CNONE 0x00 /* Not in a service context */
208#define SRSR_CRX 0x40 /* Rx Context */
209#define SRSR_CTX 0x80 /* Tx Context */
210#define SRSR_CMDM 0xC0 /* Modem Context */
211#define SRSR_ANYINT 0x6F /* Any interrupt flag */
212#define SRSR_RINT 0x10 /* Receive Interrupt */
213#define SRSR_TINT 0x04 /* Transmit Interrupt */
214#define SRSR_MINT 0x01 /* Modem Interrupt */
215#define SRSR_REXT 0x20 /* Receive External Interrupt */
216#define SRSR_TEXT 0x08 /* Transmit External Interrupt */
217#define SRSR_MEXT 0x02 /* Modem External Interrupt */
218
219
220/* Service Request Configuration Register */
221
222#define SRCR_PKGTYPE 0x80
223#define SRCR_REGACKEN 0x40
224#define SRCR_DAISYEN 0x20
225#define SRCR_GLOBPRI 0x10
226#define SRCR_UNFAIR 0x08
227#define SRCR_AUTOPRI 0x02
228#define SRCR_PRISEL 0x01
229
230/* Values for register-based Interrupt ACKs */
231#define CD180_ACK_MINT 0x75 /* goes to MSMR */
232#define CD180_ACK_TINT 0x76 /* goes to TSMR */
233#define CD180_ACK_RINT 0x77 /* goes to RSMR */
234
235/* Escape characters */
236
237#define CD180_C_ESC 0x00 /* Escape character */
238#define CD180_C_SBRK 0x81 /* Start sending BREAK */
239#define CD180_C_DELAY 0x82 /* Delay output */
240#define CD180_C_EBRK 0x83 /* Stop sending BREAK */
diff --git a/drivers/sbus/char/cpwatchdog.c b/drivers/sbus/char/cpwatchdog.c
new file mode 100644
index 00000000000..c82abeb59d3
--- /dev/null
+++ b/drivers/sbus/char/cpwatchdog.c
@@ -0,0 +1,832 @@
1/* cpwatchdog.c - driver implementation for hardware watchdog
2 * timers found on Sun Microsystems CP1400 and CP1500 boards.
3 *
4 * This device supports both the generic Linux watchdog
5 * interface and Solaris-compatible ioctls as best it is
6 * able.
7 *
8 * NOTE: CP1400 systems appear to have a defective intr_mask
9 * register on the PLD, preventing the disabling of
10 * timer interrupts. We use a timer to periodically
11 * reset 'stopped' watchdogs on affected platforms.
12 *
13 * TODO: DevFS support (/dev/watchdogs/0 ... /dev/watchdogs/2)
14 *
15 * Copyright (c) 2000 Eric Brower (ebrower@usa.net)
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/fs.h>
21#include <linux/errno.h>
22#include <linux/major.h>
23#include <linux/init.h>
24#include <linux/miscdevice.h>
25#include <linux/sched.h>
26#include <linux/interrupt.h>
27#include <linux/ioport.h>
28#include <linux/timer.h>
29#include <asm/irq.h>
30#include <asm/ebus.h>
31#include <asm/oplib.h>
32#include <asm/uaccess.h>
33
34#include <asm/watchdog.h>
35
36#define WD_OBPNAME "watchdog"
37#define WD_BADMODEL "SUNW,501-5336"
38#define WD_BTIMEOUT (jiffies + (HZ * 1000))
39#define WD_BLIMIT 0xFFFF
40
41#define WD0_DEVNAME "watchdog0"
42#define WD1_DEVNAME "watchdog1"
43#define WD2_DEVNAME "watchdog2"
44
45#define WD0_MINOR 212
46#define WD1_MINOR 213
47#define WD2_MINOR 214
48
49
50/* Internal driver definitions
51 */
52#define WD0_ID 0 /* Watchdog0 */
53#define WD1_ID 1 /* Watchdog1 */
54#define WD2_ID 2 /* Watchdog2 */
55#define WD_NUMDEVS 3 /* Device contains 3 timers */
56
57#define WD_INTR_OFF 0 /* Interrupt disable value */
58#define WD_INTR_ON 1 /* Interrupt enable value */
59
60#define WD_STAT_INIT 0x01 /* Watchdog timer is initialized */
61#define WD_STAT_BSTOP 0x02 /* Watchdog timer is brokenstopped */
62#define WD_STAT_SVCD 0x04 /* Watchdog interrupt occurred */
63
64/* Register value definitions
65 */
66#define WD0_INTR_MASK 0x01 /* Watchdog device interrupt masks */
67#define WD1_INTR_MASK 0x02
68#define WD2_INTR_MASK 0x04
69
70#define WD_S_RUNNING 0x01 /* Watchdog device status running */
71#define WD_S_EXPIRED 0x02 /* Watchdog device status expired */
72
73/* Sun uses Altera PLD EPF8820ATC144-4
74 * providing three hardware watchdogs:
75 *
76 * 1) RIC - sends an interrupt when triggered
77 * 2) XIR - asserts XIR_B_RESET when triggered, resets CPU
78 * 3) POR - asserts POR_B_RESET when triggered, resets CPU, backplane, board
79 *
80 *** Timer register block definition (struct wd_timer_regblk)
81 *
82 * dcntr and limit registers (halfword access):
83 * -------------------
84 * | 15 | ...| 1 | 0 |
85 * -------------------
86 * |- counter val -|
87 * -------------------
88 * dcntr - Current 16-bit downcounter value.
89 * When downcounter reaches '0' watchdog expires.
90 * Reading this register resets downcounter with 'limit' value.
91 * limit - 16-bit countdown value in 1/10th second increments.
92 * Writing this register begins countdown with input value.
93 * Reading from this register does not affect counter.
94 * NOTES: After watchdog reset, dcntr and limit contain '1'
95 *
96 * status register (byte access):
97 * ---------------------------
98 * | 7 | ... | 2 | 1 | 0 |
99 * --------------+------------
100 * |- UNUSED -| EXP | RUN |
101 * ---------------------------
102 * status- Bit 0 - Watchdog is running
103 * Bit 1 - Watchdog has expired
104 *
105 *** PLD register block definition (struct wd_pld_regblk)
106 *
107 * intr_mask register (byte access):
108 * ---------------------------------
109 * | 7 | ... | 3 | 2 | 1 | 0 |
110 * +-------------+------------------
111 * |- UNUSED -| WD3 | WD2 | WD1 |
112 * ---------------------------------
113 * WD3 - 1 == Interrupt disabled for watchdog 3
114 * WD2 - 1 == Interrupt disabled for watchdog 2
115 * WD1 - 1 == Interrupt disabled for watchdog 1
116 *
117 * pld_status register (byte access):
118 * UNKNOWN, MAGICAL MYSTERY REGISTER
119 *
120 */
121#define WD_TIMER_REGSZ 16
122#define WD0_OFF 0
123#define WD1_OFF (WD_TIMER_REGSZ * 1)
124#define WD2_OFF (WD_TIMER_REGSZ * 2)
125#define PLD_OFF (WD_TIMER_REGSZ * 3)
126
127#define WD_DCNTR 0x00
128#define WD_LIMIT 0x04
129#define WD_STATUS 0x08
130
131#define PLD_IMASK (PLD_OFF + 0x00)
132#define PLD_STATUS (PLD_OFF + 0x04)
133
134/* Individual timer structure
135 */
136struct wd_timer {
137 __u16 timeout;
138 __u8 intr_mask;
139 unsigned char runstatus;
140 void __iomem *regs;
141};
142
143/* Device structure
144 */
145struct wd_device {
146 int irq;
147 spinlock_t lock;
148 unsigned char isbaddoggie; /* defective PLD */
149 unsigned char opt_enable;
150 unsigned char opt_reboot;
151 unsigned short opt_timeout;
152 unsigned char initialized;
153 struct wd_timer watchdog[WD_NUMDEVS];
154 void __iomem *regs;
155};
156
157static struct wd_device wd_dev = {
158 0, SPIN_LOCK_UNLOCKED, 0, 0, 0, 0,
159};
160
161static struct timer_list wd_timer;
162
163static int wd0_timeout = 0;
164static int wd1_timeout = 0;
165static int wd2_timeout = 0;
166
167#ifdef MODULE
168module_param (wd0_timeout, int, 0);
169MODULE_PARM_DESC(wd0_timeout, "Default watchdog0 timeout in 1/10secs");
170module_param (wd1_timeout, int, 0);
171MODULE_PARM_DESC(wd1_timeout, "Default watchdog1 timeout in 1/10secs");
172module_param (wd2_timeout, int, 0);
173MODULE_PARM_DESC(wd2_timeout, "Default watchdog2 timeout in 1/10secs");
174
175MODULE_AUTHOR
176 ("Eric Brower <ebrower@usa.net>");
177MODULE_DESCRIPTION
178 ("Hardware watchdog driver for Sun Microsystems CP1400/1500");
179MODULE_LICENSE("GPL");
180MODULE_SUPPORTED_DEVICE
181 ("watchdog");
182#endif /* ifdef MODULE */
183
184/* Forward declarations of internal methods
185 */
186#ifdef WD_DEBUG
187static void wd_dumpregs(void);
188#endif
189static irqreturn_t wd_interrupt(int irq, void *dev_id, struct pt_regs *regs);
190static void wd_toggleintr(struct wd_timer* pTimer, int enable);
191static void wd_pingtimer(struct wd_timer* pTimer);
192static void wd_starttimer(struct wd_timer* pTimer);
193static void wd_resetbrokentimer(struct wd_timer* pTimer);
194static void wd_stoptimer(struct wd_timer* pTimer);
195static void wd_brokentimer(unsigned long data);
196static int wd_getstatus(struct wd_timer* pTimer);
197
198/* PLD expects words to be written in LSB format,
199 * so we must flip all words prior to writing them to regs
200 */
201static inline unsigned short flip_word(unsigned short word)
202{
203 return ((word & 0xff) << 8) | ((word >> 8) & 0xff);
204}
205
206#define wd_writew(val, addr) (writew(flip_word(val), addr))
207#define wd_readw(addr) (flip_word(readw(addr)))
208#define wd_writeb(val, addr) (writeb(val, addr))
209#define wd_readb(addr) (readb(addr))
210
211
212/* CP1400s seem to have broken PLD implementations--
213 * the interrupt_mask register cannot be written, so
214 * no timer interrupts can be masked within the PLD.
215 */
216static inline int wd_isbroken(void)
217{
218 /* we could test this by read/write/read/restore
219 * on the interrupt mask register only if OBP
220 * 'watchdog-enable?' == FALSE, but it seems
221 * ubiquitous on CP1400s
222 */
223 char val[32];
224 prom_getproperty(prom_root_node, "model", val, sizeof(val));
225 return((!strcmp(val, WD_BADMODEL)) ? 1 : 0);
226}
227
228/* Retrieve watchdog-enable? option from OBP
229 * Returns 0 if false, 1 if true
230 */
231static inline int wd_opt_enable(void)
232{
233 int opt_node;
234
235 opt_node = prom_getchild(prom_root_node);
236 opt_node = prom_searchsiblings(opt_node, "options");
237 return((-1 == prom_getint(opt_node, "watchdog-enable?")) ? 0 : 1);
238}
239
240/* Retrieve watchdog-reboot? option from OBP
241 * Returns 0 if false, 1 if true
242 */
243static inline int wd_opt_reboot(void)
244{
245 int opt_node;
246
247 opt_node = prom_getchild(prom_root_node);
248 opt_node = prom_searchsiblings(opt_node, "options");
249 return((-1 == prom_getint(opt_node, "watchdog-reboot?")) ? 0 : 1);
250}
251
252/* Retrieve watchdog-timeout option from OBP
253 * Returns OBP value, or 0 if not located
254 */
255static inline int wd_opt_timeout(void)
256{
257 int opt_node;
258 char value[32];
259 char *p = value;
260
261 opt_node = prom_getchild(prom_root_node);
262 opt_node = prom_searchsiblings(opt_node, "options");
263 opt_node = prom_getproperty(opt_node,
264 "watchdog-timeout",
265 value,
266 sizeof(value));
267 if(-1 != opt_node) {
268 /* atoi implementation */
269 for(opt_node = 0; /* nop */; p++) {
270 if(*p >= '0' && *p <= '9') {
271 opt_node = (10*opt_node)+(*p-'0');
272 }
273 else {
274 break;
275 }
276 }
277 }
278 return((-1 == opt_node) ? (0) : (opt_node));
279}
280
281static int wd_open(struct inode *inode, struct file *f)
282{
283 switch(iminor(inode))
284 {
285 case WD0_MINOR:
286 f->private_data = &wd_dev.watchdog[WD0_ID];
287 break;
288 case WD1_MINOR:
289 f->private_data = &wd_dev.watchdog[WD1_ID];
290 break;
291 case WD2_MINOR:
292 f->private_data = &wd_dev.watchdog[WD2_ID];
293 break;
294 default:
295 return(-ENODEV);
296 }
297
298 /* Register IRQ on first open of device */
299 if(0 == wd_dev.initialized)
300 {
301 if (request_irq(wd_dev.irq,
302 &wd_interrupt,
303 SA_SHIRQ,
304 WD_OBPNAME,
305 (void *)wd_dev.regs)) {
306 printk("%s: Cannot register IRQ %s\n",
307 WD_OBPNAME, __irq_itoa(wd_dev.irq));
308 return(-EBUSY);
309 }
310 wd_dev.initialized = 1;
311 }
312
313 return(nonseekable_open(inode, f));
314}
315
316static int wd_release(struct inode *inode, struct file *file)
317{
318 return 0;
319}
320
321static int wd_ioctl(struct inode *inode, struct file *file,
322 unsigned int cmd, unsigned long arg)
323{
324 int setopt = 0;
325 struct wd_timer* pTimer = (struct wd_timer*)file->private_data;
326 void __user *argp = (void __user *)arg;
327 struct watchdog_info info = {
328 0,
329 0,
330 "Altera EPF8820ATC144-4"
331 };
332
333 if(NULL == pTimer) {
334 return(-EINVAL);
335 }
336
337 switch(cmd)
338 {
339 /* Generic Linux IOCTLs */
340 case WDIOC_GETSUPPORT:
341 if(copy_to_user(argp, &info, sizeof(struct watchdog_info))) {
342 return(-EFAULT);
343 }
344 break;
345 case WDIOC_GETSTATUS:
346 case WDIOC_GETBOOTSTATUS:
347 if (put_user(0, (int __user *)argp))
348 return -EFAULT;
349 break;
350 case WDIOC_KEEPALIVE:
351 wd_pingtimer(pTimer);
352 break;
353 case WDIOC_SETOPTIONS:
354 if(copy_from_user(&setopt, argp, sizeof(unsigned int))) {
355 return -EFAULT;
356 }
357 if(setopt & WDIOS_DISABLECARD) {
358 if(wd_dev.opt_enable) {
359 printk(
360 "%s: cannot disable watchdog in ENABLED mode\n",
361 WD_OBPNAME);
362 return(-EINVAL);
363 }
364 wd_stoptimer(pTimer);
365 }
366 else if(setopt & WDIOS_ENABLECARD) {
367 wd_starttimer(pTimer);
368 }
369 else {
370 return(-EINVAL);
371 }
372 break;
373 /* Solaris-compatible IOCTLs */
374 case WIOCGSTAT:
375 setopt = wd_getstatus(pTimer);
376 if(copy_to_user(argp, &setopt, sizeof(unsigned int))) {
377 return(-EFAULT);
378 }
379 break;
380 case WIOCSTART:
381 wd_starttimer(pTimer);
382 break;
383 case WIOCSTOP:
384 if(wd_dev.opt_enable) {
385 printk("%s: cannot disable watchdog in ENABLED mode\n",
386 WD_OBPNAME);
387 return(-EINVAL);
388 }
389 wd_stoptimer(pTimer);
390 break;
391 default:
392 return(-EINVAL);
393 }
394 return(0);
395}
396
397static ssize_t wd_write(struct file *file,
398 const char __user *buf,
399 size_t count,
400 loff_t *ppos)
401{
402 struct wd_timer* pTimer = (struct wd_timer*)file->private_data;
403
404 if(NULL == pTimer) {
405 return(-EINVAL);
406 }
407
408 if (count) {
409 wd_pingtimer(pTimer);
410 return 1;
411 }
412 return 0;
413}
414
415static ssize_t wd_read(struct file * file, char __user *buffer,
416 size_t count, loff_t *ppos)
417{
418#ifdef WD_DEBUG
419 wd_dumpregs();
420 return(0);
421#else
422 return(-EINVAL);
423#endif /* ifdef WD_DEBUG */
424}
425
426static irqreturn_t wd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
427{
428 /* Only WD0 will interrupt-- others are NMI and we won't
429 * see them here....
430 */
431 spin_lock_irq(&wd_dev.lock);
432 if((unsigned long)wd_dev.regs == (unsigned long)dev_id)
433 {
434 wd_stoptimer(&wd_dev.watchdog[WD0_ID]);
435 wd_dev.watchdog[WD0_ID].runstatus |= WD_STAT_SVCD;
436 }
437 spin_unlock_irq(&wd_dev.lock);
438 return IRQ_HANDLED;
439}
440
441static struct file_operations wd_fops = {
442 .owner = THIS_MODULE,
443 .ioctl = wd_ioctl,
444 .open = wd_open,
445 .write = wd_write,
446 .read = wd_read,
447 .release = wd_release,
448};
449
450static struct miscdevice wd0_miscdev = { WD0_MINOR, WD0_DEVNAME, &wd_fops };
451static struct miscdevice wd1_miscdev = { WD1_MINOR, WD1_DEVNAME, &wd_fops };
452static struct miscdevice wd2_miscdev = { WD2_MINOR, WD2_DEVNAME, &wd_fops };
453
454#ifdef WD_DEBUG
455static void wd_dumpregs(void)
456{
457 /* Reading from downcounters initiates watchdog countdown--
458 * Example is included below for illustration purposes.
459 */
460 int i;
461 printk("%s: dumping register values\n", WD_OBPNAME);
462 for(i = WD0_ID; i < WD_NUMDEVS; ++i) {
463 /* printk("\t%s%i: dcntr at 0x%lx: 0x%x\n",
464 * WD_OBPNAME,
465 * i,
466 * (unsigned long)(&wd_dev.watchdog[i].regs->dcntr),
467 * readw(&wd_dev.watchdog[i].regs->dcntr));
468 */
469 printk("\t%s%i: limit at 0x%lx: 0x%x\n",
470 WD_OBPNAME,
471 i,
472 (unsigned long)(&wd_dev.watchdog[i].regs->limit),
473 readw(&wd_dev.watchdog[i].regs->limit));
474 printk("\t%s%i: status at 0x%lx: 0x%x\n",
475 WD_OBPNAME,
476 i,
477 (unsigned long)(&wd_dev.watchdog[i].regs->status),
478 readb(&wd_dev.watchdog[i].regs->status));
479 printk("\t%s%i: driver status: 0x%x\n",
480 WD_OBPNAME,
481 i,
482 wd_getstatus(&wd_dev.watchdog[i]));
483 }
484 printk("\tintr_mask at %p: 0x%x\n",
485 wd_dev.regs + PLD_IMASK,
486 readb(wd_dev.regs + PLD_IMASK));
487 printk("\tpld_status at %p: 0x%x\n",
488 wd_dev.regs + PLD_STATUS,
489 readb(wd_dev.regs + PLD_STATUS));
490}
491#endif
492
493/* Enable or disable watchdog interrupts
494 * Because of the CP1400 defect this should only be
495 * called during initialzation or by wd_[start|stop]timer()
496 *
497 * pTimer - pointer to timer device, or NULL to indicate all timers
498 * enable - non-zero to enable interrupts, zero to disable
499 */
500static void wd_toggleintr(struct wd_timer* pTimer, int enable)
501{
502 unsigned char curregs = wd_readb(wd_dev.regs + PLD_IMASK);
503 unsigned char setregs =
504 (NULL == pTimer) ?
505 (WD0_INTR_MASK | WD1_INTR_MASK | WD2_INTR_MASK) :
506 (pTimer->intr_mask);
507
508 (WD_INTR_ON == enable) ?
509 (curregs &= ~setregs):
510 (curregs |= setregs);
511
512 wd_writeb(curregs, wd_dev.regs + PLD_IMASK);
513 return;
514}
515
516/* Reset countdown timer with 'limit' value and continue countdown.
517 * This will not start a stopped timer.
518 *
519 * pTimer - pointer to timer device
520 */
521static void wd_pingtimer(struct wd_timer* pTimer)
522{
523 if (wd_readb(pTimer->regs + WD_STATUS) & WD_S_RUNNING) {
524 wd_readw(pTimer->regs + WD_DCNTR);
525 }
526}
527
528/* Stop a running watchdog timer-- the timer actually keeps
529 * running, but the interrupt is masked so that no action is
530 * taken upon expiration.
531 *
532 * pTimer - pointer to timer device
533 */
534static void wd_stoptimer(struct wd_timer* pTimer)
535{
536 if(wd_readb(pTimer->regs + WD_STATUS) & WD_S_RUNNING) {
537 wd_toggleintr(pTimer, WD_INTR_OFF);
538
539 if(wd_dev.isbaddoggie) {
540 pTimer->runstatus |= WD_STAT_BSTOP;
541 wd_brokentimer((unsigned long)&wd_dev);
542 }
543 }
544}
545
546/* Start a watchdog timer with the specified limit value
547 * If the watchdog is running, it will be restarted with
548 * the provided limit value.
549 *
550 * This function will enable interrupts on the specified
551 * watchdog.
552 *
553 * pTimer - pointer to timer device
554 * limit - limit (countdown) value in 1/10th seconds
555 */
556static void wd_starttimer(struct wd_timer* pTimer)
557{
558 if(wd_dev.isbaddoggie) {
559 pTimer->runstatus &= ~WD_STAT_BSTOP;
560 }
561 pTimer->runstatus &= ~WD_STAT_SVCD;
562
563 wd_writew(pTimer->timeout, pTimer->regs + WD_LIMIT);
564 wd_toggleintr(pTimer, WD_INTR_ON);
565}
566
567/* Restarts timer with maximum limit value and
568 * does not unset 'brokenstop' value.
569 */
570static void wd_resetbrokentimer(struct wd_timer* pTimer)
571{
572 wd_toggleintr(pTimer, WD_INTR_ON);
573 wd_writew(WD_BLIMIT, pTimer->regs + WD_LIMIT);
574}
575
576/* Timer device initialization helper.
577 * Returns 0 on success, other on failure
578 */
579static int wd_inittimer(int whichdog)
580{
581 struct miscdevice *whichmisc;
582 void __iomem *whichregs;
583 char whichident[8];
584 int whichmask;
585 __u16 whichlimit;
586
587 switch(whichdog)
588 {
589 case WD0_ID:
590 whichmisc = &wd0_miscdev;
591 strcpy(whichident, "RIC");
592 whichregs = wd_dev.regs + WD0_OFF;
593 whichmask = WD0_INTR_MASK;
594 whichlimit= (0 == wd0_timeout) ?
595 (wd_dev.opt_timeout):
596 (wd0_timeout);
597 break;
598 case WD1_ID:
599 whichmisc = &wd1_miscdev;
600 strcpy(whichident, "XIR");
601 whichregs = wd_dev.regs + WD1_OFF;
602 whichmask = WD1_INTR_MASK;
603 whichlimit= (0 == wd1_timeout) ?
604 (wd_dev.opt_timeout):
605 (wd1_timeout);
606 break;
607 case WD2_ID:
608 whichmisc = &wd2_miscdev;
609 strcpy(whichident, "POR");
610 whichregs = wd_dev.regs + WD2_OFF;
611 whichmask = WD2_INTR_MASK;
612 whichlimit= (0 == wd2_timeout) ?
613 (wd_dev.opt_timeout):
614 (wd2_timeout);
615 break;
616 default:
617 printk("%s: %s: invalid watchdog id: %i\n",
618 WD_OBPNAME, __FUNCTION__, whichdog);
619 return(1);
620 }
621 if(0 != misc_register(whichmisc))
622 {
623 return(1);
624 }
625 wd_dev.watchdog[whichdog].regs = whichregs;
626 wd_dev.watchdog[whichdog].timeout = whichlimit;
627 wd_dev.watchdog[whichdog].intr_mask = whichmask;
628 wd_dev.watchdog[whichdog].runstatus &= ~WD_STAT_BSTOP;
629 wd_dev.watchdog[whichdog].runstatus |= WD_STAT_INIT;
630
631 printk("%s%i: %s hardware watchdog [%01i.%i sec] %s\n",
632 WD_OBPNAME,
633 whichdog,
634 whichident,
635 wd_dev.watchdog[whichdog].timeout / 10,
636 wd_dev.watchdog[whichdog].timeout % 10,
637 (0 != wd_dev.opt_enable) ? "in ENABLED mode" : "");
638 return(0);
639}
640
641/* Timer method called to reset stopped watchdogs--
642 * because of the PLD bug on CP1400, we cannot mask
643 * interrupts within the PLD so me must continually
644 * reset the timers ad infinitum.
645 */
646static void wd_brokentimer(unsigned long data)
647{
648 struct wd_device* pDev = (struct wd_device*)data;
649 int id, tripped = 0;
650
651 /* kill a running timer instance, in case we
652 * were called directly instead of by kernel timer
653 */
654 if(timer_pending(&wd_timer)) {
655 del_timer(&wd_timer);
656 }
657
658 for(id = WD0_ID; id < WD_NUMDEVS; ++id) {
659 if(pDev->watchdog[id].runstatus & WD_STAT_BSTOP) {
660 ++tripped;
661 wd_resetbrokentimer(&pDev->watchdog[id]);
662 }
663 }
664
665 if(tripped) {
666 /* there is at least one timer brokenstopped-- reschedule */
667 init_timer(&wd_timer);
668 wd_timer.expires = WD_BTIMEOUT;
669 add_timer(&wd_timer);
670 }
671}
672
673static int wd_getstatus(struct wd_timer* pTimer)
674{
675 unsigned char stat = wd_readb(pTimer->regs + WD_STATUS);
676 unsigned char intr = wd_readb(wd_dev.regs + PLD_IMASK);
677 unsigned char ret = WD_STOPPED;
678
679 /* determine STOPPED */
680 if(0 == stat ) {
681 return(ret);
682 }
683 /* determine EXPIRED vs FREERUN vs RUNNING */
684 else if(WD_S_EXPIRED & stat) {
685 ret = WD_EXPIRED;
686 }
687 else if(WD_S_RUNNING & stat) {
688 if(intr & pTimer->intr_mask) {
689 ret = WD_FREERUN;
690 }
691 else {
692 /* Fudge WD_EXPIRED status for defective CP1400--
693 * IF timer is running
694 * AND brokenstop is set
695 * AND an interrupt has been serviced
696 * we are WD_EXPIRED.
697 *
698 * IF timer is running
699 * AND brokenstop is set
700 * AND no interrupt has been serviced
701 * we are WD_FREERUN.
702 */
703 if(wd_dev.isbaddoggie && (pTimer->runstatus & WD_STAT_BSTOP)) {
704 if(pTimer->runstatus & WD_STAT_SVCD) {
705 ret = WD_EXPIRED;
706 }
707 else {
708 /* we could as well pretend we are expired */
709 ret = WD_FREERUN;
710 }
711 }
712 else {
713 ret = WD_RUNNING;
714 }
715 }
716 }
717
718 /* determine SERVICED */
719 if(pTimer->runstatus & WD_STAT_SVCD) {
720 ret |= WD_SERVICED;
721 }
722
723 return(ret);
724}
725
726static int __init wd_init(void)
727{
728 int id;
729 struct linux_ebus *ebus = NULL;
730 struct linux_ebus_device *edev = NULL;
731
732 for_each_ebus(ebus) {
733 for_each_ebusdev(edev, ebus) {
734 if (!strcmp(edev->prom_name, WD_OBPNAME))
735 goto ebus_done;
736 }
737 }
738
739ebus_done:
740 if(!edev) {
741 printk("%s: unable to locate device\n", WD_OBPNAME);
742 return -ENODEV;
743 }
744
745 wd_dev.regs =
746 ioremap(edev->resource[0].start, 4 * WD_TIMER_REGSZ); /* ? */
747
748 if(NULL == wd_dev.regs) {
749 printk("%s: unable to map registers\n", WD_OBPNAME);
750 return(-ENODEV);
751 }
752
753 /* initialize device structure from OBP parameters */
754 wd_dev.irq = edev->irqs[0];
755 wd_dev.opt_enable = wd_opt_enable();
756 wd_dev.opt_reboot = wd_opt_reboot();
757 wd_dev.opt_timeout = wd_opt_timeout();
758 wd_dev.isbaddoggie = wd_isbroken();
759
760 /* disable all interrupts unless watchdog-enabled? == true */
761 if(! wd_dev.opt_enable) {
762 wd_toggleintr(NULL, WD_INTR_OFF);
763 }
764
765 /* register miscellaneous devices */
766 for(id = WD0_ID; id < WD_NUMDEVS; ++id) {
767 if(0 != wd_inittimer(id)) {
768 printk("%s%i: unable to initialize\n", WD_OBPNAME, id);
769 }
770 }
771
772 /* warn about possible defective PLD */
773 if(wd_dev.isbaddoggie) {
774 init_timer(&wd_timer);
775 wd_timer.function = wd_brokentimer;
776 wd_timer.data = (unsigned long)&wd_dev;
777 wd_timer.expires = WD_BTIMEOUT;
778
779 printk("%s: PLD defect workaround enabled for model %s\n",
780 WD_OBPNAME, WD_BADMODEL);
781 }
782 return(0);
783}
784
785static void __exit wd_cleanup(void)
786{
787 int id;
788
789 /* if 'watchdog-enable?' == TRUE, timers are not stopped
790 * when module is unloaded. All brokenstopped timers will
791 * also now eventually trip.
792 */
793 for(id = WD0_ID; id < WD_NUMDEVS; ++id) {
794 if(WD_S_RUNNING == wd_readb(wd_dev.watchdog[id].regs + WD_STATUS)) {
795 if(wd_dev.opt_enable) {
796 printk(KERN_WARNING "%s%i: timer not stopped at release\n",
797 WD_OBPNAME, id);
798 }
799 else {
800 wd_stoptimer(&wd_dev.watchdog[id]);
801 if(wd_dev.watchdog[id].runstatus & WD_STAT_BSTOP) {
802 wd_resetbrokentimer(&wd_dev.watchdog[id]);
803 printk(KERN_WARNING
804 "%s%i: defect workaround disabled at release, "\
805 "timer expires in ~%01i sec\n",
806 WD_OBPNAME, id,
807 wd_readw(wd_dev.watchdog[id].regs + WD_LIMIT) / 10);
808 }
809 }
810 }
811 }
812
813 if(wd_dev.isbaddoggie && timer_pending(&wd_timer)) {
814 del_timer(&wd_timer);
815 }
816 if(0 != (wd_dev.watchdog[WD0_ID].runstatus & WD_STAT_INIT)) {
817 misc_deregister(&wd0_miscdev);
818 }
819 if(0 != (wd_dev.watchdog[WD1_ID].runstatus & WD_STAT_INIT)) {
820 misc_deregister(&wd1_miscdev);
821 }
822 if(0 != (wd_dev.watchdog[WD2_ID].runstatus & WD_STAT_INIT)) {
823 misc_deregister(&wd2_miscdev);
824 }
825 if(0 != wd_dev.initialized) {
826 free_irq(wd_dev.irq, (void *)wd_dev.regs);
827 }
828 iounmap(wd_dev.regs);
829}
830
831module_init(wd_init);
832module_exit(wd_cleanup);
diff --git a/drivers/sbus/char/display7seg.c b/drivers/sbus/char/display7seg.c
new file mode 100644
index 00000000000..dbad7f35eb0
--- /dev/null
+++ b/drivers/sbus/char/display7seg.c
@@ -0,0 +1,234 @@
1/* $Id: display7seg.c,v 1.6 2002/01/08 16:00:16 davem Exp $
2 *
3 * display7seg - Driver implementation for the 7-segment display
4 * present on Sun Microsystems CP1400 and CP1500
5 *
6 * Copyright (c) 2000 Eric Brower (ebrower@usa.net)
7 *
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/fs.h>
13#include <linux/errno.h>
14#include <linux/major.h>
15#include <linux/init.h>
16#include <linux/miscdevice.h>
17#include <linux/ioport.h> /* request_region, check_region */
18#include <asm/atomic.h>
19#include <asm/ebus.h> /* EBus device */
20#include <asm/oplib.h> /* OpenProm Library */
21#include <asm/uaccess.h> /* put_/get_user */
22
23#include <asm/display7seg.h>
24
25#define D7S_MINOR 193
26#define D7S_OBPNAME "display7seg"
27#define D7S_DEVNAME "d7s"
28
29static int sol_compat = 0; /* Solaris compatibility mode */
30
31#ifdef MODULE
32
33/* Solaris compatibility flag -
34 * The Solaris implementation omits support for several
35 * documented driver features (ref Sun doc 806-0180-03).
36 * By default, this module supports the documented driver
37 * abilities, rather than the Solaris implementation:
38 *
39 * 1) Device ALWAYS reverts to OBP-specified FLIPPED mode
40 * upon closure of device or module unload.
41 * 2) Device ioctls D7SIOCRD/D7SIOCWR honor toggling of
42 * FLIP bit
43 *
44 * If you wish the device to operate as under Solaris,
45 * omitting above features, set this parameter to non-zero.
46 */
47module_param
48 (sol_compat, int, 0);
49MODULE_PARM_DESC
50 (sol_compat,
51 "Disables documented functionality omitted from Solaris driver");
52
53MODULE_AUTHOR
54 ("Eric Brower <ebrower@usa.net>");
55MODULE_DESCRIPTION
56 ("7-Segment Display driver for Sun Microsystems CP1400/1500");
57MODULE_LICENSE("GPL");
58MODULE_SUPPORTED_DEVICE
59 ("d7s");
60#endif /* ifdef MODULE */
61
62/*
63 * Register block address- see header for details
64 * -----------------------------------------
65 * | DP | ALARM | FLIP | 4 | 3 | 2 | 1 | 0 |
66 * -----------------------------------------
67 *
68 * DP - Toggles decimal point on/off
69 * ALARM - Toggles "Alarm" LED green/red
70 * FLIP - Inverts display for upside-down mounted board
71 * bits 0-4 - 7-segment display contents
72 */
73static void __iomem* d7s_regs;
74
75static inline void d7s_free(void)
76{
77 iounmap(d7s_regs);
78}
79
80static inline int d7s_obpflipped(void)
81{
82 int opt_node;
83
84 opt_node = prom_getchild(prom_root_node);
85 opt_node = prom_searchsiblings(opt_node, "options");
86 return ((-1 != prom_getintdefault(opt_node, "d7s-flipped?", -1)) ? 0 : 1);
87}
88
89static atomic_t d7s_users = ATOMIC_INIT(0);
90
91static int d7s_open(struct inode *inode, struct file *f)
92{
93 if (D7S_MINOR != iminor(inode))
94 return -ENODEV;
95 atomic_inc(&d7s_users);
96 return 0;
97}
98
99static int d7s_release(struct inode *inode, struct file *f)
100{
101 /* Reset flipped state to OBP default only if
102 * no other users have the device open and we
103 * are not operating in solaris-compat mode
104 */
105 if (atomic_dec_and_test(&d7s_users) && !sol_compat) {
106 int regval = 0;
107
108 regval = readb(d7s_regs);
109 (0 == d7s_obpflipped()) ?
110 writeb(regval |= D7S_FLIP, d7s_regs):
111 writeb(regval &= ~D7S_FLIP, d7s_regs);
112 }
113
114 return 0;
115}
116
117static int d7s_ioctl(struct inode *inode, struct file *f,
118 unsigned int cmd, unsigned long arg)
119{
120 __u8 regs = readb(d7s_regs);
121 __u8 ireg = 0;
122
123 if (D7S_MINOR != iminor(inode))
124 return -ENODEV;
125
126 switch (cmd) {
127 case D7SIOCWR:
128 /* assign device register values
129 * we mask-out D7S_FLIP if in sol_compat mode
130 */
131 if (get_user(ireg, (int __user *) arg))
132 return -EFAULT;
133 if (0 != sol_compat) {
134 (regs & D7S_FLIP) ?
135 (ireg |= D7S_FLIP) : (ireg &= ~D7S_FLIP);
136 }
137 writeb(ireg, d7s_regs);
138 break;
139
140 case D7SIOCRD:
141 /* retrieve device register values
142 * NOTE: Solaris implementation returns D7S_FLIP bit
143 * as toggled by user, even though it does not honor it.
144 * This driver will not misinform you about the state
145 * of your hardware while in sol_compat mode
146 */
147 if (put_user(regs, (int __user *) arg))
148 return -EFAULT;
149 break;
150
151 case D7SIOCTM:
152 /* toggle device mode-- flip display orientation */
153 (regs & D7S_FLIP) ?
154 (regs &= ~D7S_FLIP) : (regs |= D7S_FLIP);
155 writeb(regs, d7s_regs);
156 break;
157 };
158
159 return 0;
160}
161
162static struct file_operations d7s_fops = {
163 .owner = THIS_MODULE,
164 .ioctl = d7s_ioctl,
165 .open = d7s_open,
166 .release = d7s_release,
167};
168
169static struct miscdevice d7s_miscdev = { D7S_MINOR, D7S_DEVNAME, &d7s_fops };
170
171static int __init d7s_init(void)
172{
173 struct linux_ebus *ebus = NULL;
174 struct linux_ebus_device *edev = NULL;
175 int iTmp = 0, regs = 0;
176
177 for_each_ebus(ebus) {
178 for_each_ebusdev(edev, ebus) {
179 if (!strcmp(edev->prom_name, D7S_OBPNAME))
180 goto ebus_done;
181 }
182 }
183
184ebus_done:
185 if(!edev) {
186 printk("%s: unable to locate device\n", D7S_DEVNAME);
187 return -ENODEV;
188 }
189
190 d7s_regs = ioremap(edev->resource[0].start, sizeof(__u8));
191
192 iTmp = misc_register(&d7s_miscdev);
193 if (0 != iTmp) {
194 printk("%s: unable to acquire miscdevice minor %i\n",
195 D7S_DEVNAME, D7S_MINOR);
196 iounmap(d7s_regs);
197 return iTmp;
198 }
199
200 /* OBP option "d7s-flipped?" is honored as default
201 * for the device, and reset default when detached
202 */
203 regs = readb(d7s_regs);
204 iTmp = d7s_obpflipped();
205 (0 == iTmp) ?
206 writeb(regs |= D7S_FLIP, d7s_regs):
207 writeb(regs &= ~D7S_FLIP, d7s_regs);
208
209 printk("%s: 7-Segment Display%s at 0x%lx %s\n",
210 D7S_DEVNAME,
211 (0 == iTmp) ? (" (FLIPPED)") : (""),
212 edev->resource[0].start,
213 (0 != sol_compat) ? ("in sol_compat mode") : (""));
214
215 return 0;
216}
217
218static void __exit d7s_cleanup(void)
219{
220 int regs = readb(d7s_regs);
221
222 /* Honor OBP d7s-flipped? unless operating in solaris-compat mode */
223 if (0 == sol_compat) {
224 (0 == d7s_obpflipped()) ?
225 writeb(regs |= D7S_FLIP, d7s_regs):
226 writeb(regs &= ~D7S_FLIP, d7s_regs);
227 }
228
229 misc_deregister(&d7s_miscdev);
230 d7s_free();
231}
232
233module_init(d7s_init);
234module_exit(d7s_cleanup);
diff --git a/drivers/sbus/char/envctrl.c b/drivers/sbus/char/envctrl.c
new file mode 100644
index 00000000000..f6ed35b24f4
--- /dev/null
+++ b/drivers/sbus/char/envctrl.c
@@ -0,0 +1,1181 @@
1/* $Id: envctrl.c,v 1.25 2002/01/15 09:01:26 davem Exp $
2 * envctrl.c: Temperature and Fan monitoring on Machines providing it.
3 *
4 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 2000 Vinh Truong (vinh.truong@eng.sun.com)
6 * VT - The implementation is to support Sun Microelectronics (SME) platform
7 * environment monitoring. SME platforms use pcf8584 as the i2c bus
8 * controller to access pcf8591 (8-bit A/D and D/A converter) and
9 * pcf8571 (256 x 8-bit static low-voltage RAM with I2C-bus interface).
10 * At board level, it follows SME Firmware I2C Specification. Reference:
11 * http://www-eu2.semiconductors.com/pip/PCF8584P
12 * http://www-eu2.semiconductors.com/pip/PCF8574AP
13 * http://www-eu2.semiconductors.com/pip/PCF8591P
14 *
15 * EB - Added support for CP1500 Global Address and PS/Voltage monitoring.
16 * Eric Brower <ebrower@usa.net>
17 *
18 * DB - Audit every copy_to_user in envctrl_read.
19 * Daniele Bellucci <bellucda@tiscali.it>
20 */
21
22#include <linux/config.h>
23#include <linux/module.h>
24#include <linux/sched.h>
25#include <linux/errno.h>
26#include <linux/delay.h>
27#include <linux/ioport.h>
28#include <linux/init.h>
29#include <linux/miscdevice.h>
30#include <linux/mm.h>
31#include <linux/slab.h>
32#include <linux/kernel.h>
33
34#include <asm/ebus.h>
35#include <asm/uaccess.h>
36#include <asm/envctrl.h>
37
38#define __KERNEL_SYSCALLS__
39static int errno;
40#include <asm/unistd.h>
41
42#define ENVCTRL_MINOR 162
43
44#define PCF8584_ADDRESS 0x55
45
46#define CONTROL_PIN 0x80
47#define CONTROL_ES0 0x40
48#define CONTROL_ES1 0x20
49#define CONTROL_ES2 0x10
50#define CONTROL_ENI 0x08
51#define CONTROL_STA 0x04
52#define CONTROL_STO 0x02
53#define CONTROL_ACK 0x01
54
55#define STATUS_PIN 0x80
56#define STATUS_STS 0x20
57#define STATUS_BER 0x10
58#define STATUS_LRB 0x08
59#define STATUS_AD0 0x08
60#define STATUS_AAB 0x04
61#define STATUS_LAB 0x02
62#define STATUS_BB 0x01
63
64/*
65 * CLK Mode Register.
66 */
67#define BUS_CLK_90 0x00
68#define BUS_CLK_45 0x01
69#define BUS_CLK_11 0x02
70#define BUS_CLK_1_5 0x03
71
72#define CLK_3 0x00
73#define CLK_4_43 0x10
74#define CLK_6 0x14
75#define CLK_8 0x18
76#define CLK_12 0x1c
77
78#define OBD_SEND_START 0xc5 /* value to generate I2c_bus START condition */
79#define OBD_SEND_STOP 0xc3 /* value to generate I2c_bus STOP condition */
80
81/* Monitor type of i2c child device.
82 * Firmware definitions.
83 */
84#define PCF8584_MAX_CHANNELS 8
85#define PCF8584_GLOBALADDR_TYPE 6 /* global address monitor */
86#define PCF8584_FANSTAT_TYPE 3 /* fan status monitor */
87#define PCF8584_VOLTAGE_TYPE 2 /* voltage monitor */
88#define PCF8584_TEMP_TYPE 1 /* temperature monitor*/
89
90/* Monitor type of i2c child device.
91 * Driver definitions.
92 */
93#define ENVCTRL_NOMON 0
94#define ENVCTRL_CPUTEMP_MON 1 /* cpu temperature monitor */
95#define ENVCTRL_CPUVOLTAGE_MON 2 /* voltage monitor */
96#define ENVCTRL_FANSTAT_MON 3 /* fan status monitor */
97#define ENVCTRL_ETHERTEMP_MON 4 /* ethernet temperarture */
98 /* monitor */
99#define ENVCTRL_VOLTAGESTAT_MON 5 /* voltage status monitor */
100#define ENVCTRL_MTHRBDTEMP_MON 6 /* motherboard temperature */
101#define ENVCTRL_SCSITEMP_MON 7 /* scsi temperarture */
102#define ENVCTRL_GLOBALADDR_MON 8 /* global address */
103
104/* Child device type.
105 * Driver definitions.
106 */
107#define I2C_ADC 0 /* pcf8591 */
108#define I2C_GPIO 1 /* pcf8571 */
109
110/* Data read from child device may need to decode
111 * through a data table and a scale.
112 * Translation type as defined by firmware.
113 */
114#define ENVCTRL_TRANSLATE_NO 0
115#define ENVCTRL_TRANSLATE_PARTIAL 1
116#define ENVCTRL_TRANSLATE_COMBINED 2
117#define ENVCTRL_TRANSLATE_FULL 3 /* table[data] */
118#define ENVCTRL_TRANSLATE_SCALE 4 /* table[data]/scale */
119
120/* Driver miscellaneous definitions. */
121#define ENVCTRL_MAX_CPU 4
122#define CHANNEL_DESC_SZ 256
123
124/* Mask values for combined GlobalAddress/PowerStatus node */
125#define ENVCTRL_GLOBALADDR_ADDR_MASK 0x1F
126#define ENVCTRL_GLOBALADDR_PSTAT_MASK 0x60
127
128/* Node 0x70 ignored on CompactPCI CP1400/1500 platforms
129 * (see envctrl_init_i2c_child)
130 */
131#define ENVCTRL_CPCI_IGNORED_NODE 0x70
132
133#define PCF8584_DATA 0x00
134#define PCF8584_CSR 0x01
135
136/* Each child device can be monitored by up to PCF8584_MAX_CHANNELS.
137 * Property of a port or channel as defined by the firmware.
138 */
139struct pcf8584_channel {
140 unsigned char chnl_no;
141 unsigned char io_direction;
142 unsigned char type;
143 unsigned char last;
144};
145
146/* Each child device may have one or more tables of bytes to help decode
147 * data. Table property as defined by the firmware.
148 */
149struct pcf8584_tblprop {
150 unsigned int type;
151 unsigned int scale;
152 unsigned int offset; /* offset from the beginning of the table */
153 unsigned int size;
154};
155
156/* i2c child */
157struct i2c_child_t {
158 /* Either ADC or GPIO. */
159 unsigned char i2ctype;
160 unsigned long addr;
161 struct pcf8584_channel chnl_array[PCF8584_MAX_CHANNELS];
162
163 /* Channel info. */
164 unsigned int total_chnls; /* Number of monitor channels. */
165 unsigned char fan_mask; /* Byte mask for fan status channels. */
166 unsigned char voltage_mask; /* Byte mask for voltage status channels. */
167 struct pcf8584_tblprop tblprop_array[PCF8584_MAX_CHANNELS];
168
169 /* Properties of all monitor channels. */
170 unsigned int total_tbls; /* Number of monitor tables. */
171 char *tables; /* Pointer to table(s). */
172 char chnls_desc[CHANNEL_DESC_SZ]; /* Channel description. */
173 char mon_type[PCF8584_MAX_CHANNELS];
174};
175
176static void __iomem *i2c;
177static struct i2c_child_t i2c_childlist[ENVCTRL_MAX_CPU*2];
178static unsigned char chnls_mask[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 };
179static unsigned int warning_temperature = 0;
180static unsigned int shutdown_temperature = 0;
181static char read_cpu;
182
183/* Forward declarations. */
184static struct i2c_child_t *envctrl_get_i2c_child(unsigned char);
185
186/* Function Description: Test the PIN bit (Pending Interrupt Not)
187 * to test when serial transmission is completed .
188 * Return : None.
189 */
190static void envtrl_i2c_test_pin(void)
191{
192 int limit = 1000000;
193
194 while (--limit > 0) {
195 if (!(readb(i2c + PCF8584_CSR) & STATUS_PIN))
196 break;
197 udelay(1);
198 }
199
200 if (limit <= 0)
201 printk(KERN_INFO "envctrl: Pin status will not clear.\n");
202}
203
204/* Function Description: Test busy bit.
205 * Return : None.
206 */
207static void envctrl_i2c_test_bb(void)
208{
209 int limit = 1000000;
210
211 while (--limit > 0) {
212 /* Busy bit 0 means busy. */
213 if (readb(i2c + PCF8584_CSR) & STATUS_BB)
214 break;
215 udelay(1);
216 }
217
218 if (limit <= 0)
219 printk(KERN_INFO "envctrl: Busy bit will not clear.\n");
220}
221
222/* Function Description: Send the address for a read access.
223 * Return : 0 if not acknowledged, otherwise acknowledged.
224 */
225static int envctrl_i2c_read_addr(unsigned char addr)
226{
227 envctrl_i2c_test_bb();
228
229 /* Load address. */
230 writeb(addr + 1, i2c + PCF8584_DATA);
231
232 envctrl_i2c_test_bb();
233
234 writeb(OBD_SEND_START, i2c + PCF8584_CSR);
235
236 /* Wait for PIN. */
237 envtrl_i2c_test_pin();
238
239 /* CSR 0 means acknowledged. */
240 if (!(readb(i2c + PCF8584_CSR) & STATUS_LRB)) {
241 return readb(i2c + PCF8584_DATA);
242 } else {
243 writeb(OBD_SEND_STOP, i2c + PCF8584_CSR);
244 return 0;
245 }
246}
247
248/* Function Description: Send the address for write mode.
249 * Return : None.
250 */
251static void envctrl_i2c_write_addr(unsigned char addr)
252{
253 envctrl_i2c_test_bb();
254 writeb(addr, i2c + PCF8584_DATA);
255
256 /* Generate Start condition. */
257 writeb(OBD_SEND_START, i2c + PCF8584_CSR);
258}
259
260/* Function Description: Read 1 byte of data from addr
261 * set by envctrl_i2c_read_addr()
262 * Return : Data from address set by envctrl_i2c_read_addr().
263 */
264static unsigned char envctrl_i2c_read_data(void)
265{
266 envtrl_i2c_test_pin();
267 writeb(CONTROL_ES0, i2c + PCF8584_CSR); /* Send neg ack. */
268 return readb(i2c + PCF8584_DATA);
269}
270
271/* Function Description: Instruct the device which port to read data from.
272 * Return : None.
273 */
274static void envctrl_i2c_write_data(unsigned char port)
275{
276 envtrl_i2c_test_pin();
277 writeb(port, i2c + PCF8584_DATA);
278}
279
280/* Function Description: Generate Stop condition after last byte is sent.
281 * Return : None.
282 */
283static void envctrl_i2c_stop(void)
284{
285 envtrl_i2c_test_pin();
286 writeb(OBD_SEND_STOP, i2c + PCF8584_CSR);
287}
288
289/* Function Description: Read adc device.
290 * Return : Data at address and port.
291 */
292static unsigned char envctrl_i2c_read_8591(unsigned char addr, unsigned char port)
293{
294 /* Send address. */
295 envctrl_i2c_write_addr(addr);
296
297 /* Setup port to read. */
298 envctrl_i2c_write_data(port);
299 envctrl_i2c_stop();
300
301 /* Read port. */
302 envctrl_i2c_read_addr(addr);
303
304 /* Do a single byte read and send stop. */
305 envctrl_i2c_read_data();
306 envctrl_i2c_stop();
307
308 return readb(i2c + PCF8584_DATA);
309}
310
311/* Function Description: Read gpio device.
312 * Return : Data at address.
313 */
314static unsigned char envctrl_i2c_read_8574(unsigned char addr)
315{
316 unsigned char rd;
317
318 envctrl_i2c_read_addr(addr);
319
320 /* Do a single byte read and send stop. */
321 rd = envctrl_i2c_read_data();
322 envctrl_i2c_stop();
323 return rd;
324}
325
326/* Function Description: Decode data read from an adc device using firmware
327 * table.
328 * Return: Number of read bytes. Data is stored in bufdata in ascii format.
329 */
330static int envctrl_i2c_data_translate(unsigned char data, int translate_type,
331 int scale, char *tbl, char *bufdata)
332{
333 int len = 0;
334
335 switch (translate_type) {
336 case ENVCTRL_TRANSLATE_NO:
337 /* No decode necessary. */
338 len = 1;
339 bufdata[0] = data;
340 break;
341
342 case ENVCTRL_TRANSLATE_FULL:
343 /* Decode this way: data = table[data]. */
344 len = 1;
345 bufdata[0] = tbl[data];
346 break;
347
348 case ENVCTRL_TRANSLATE_SCALE:
349 /* Decode this way: data = table[data]/scale */
350 sprintf(bufdata,"%d ", (tbl[data] * 10) / (scale));
351 len = strlen(bufdata);
352 bufdata[len - 1] = bufdata[len - 2];
353 bufdata[len - 2] = '.';
354 break;
355
356 default:
357 break;
358 };
359
360 return len;
361}
362
363/* Function Description: Read cpu-related data such as cpu temperature, voltage.
364 * Return: Number of read bytes. Data is stored in bufdata in ascii format.
365 */
366static int envctrl_read_cpu_info(int cpu, struct i2c_child_t *pchild,
367 char mon_type, unsigned char *bufdata)
368{
369 unsigned char data;
370 int i;
371 char *tbl, j = -1;
372
373 /* Find the right monitor type and channel. */
374 for (i = 0; i < PCF8584_MAX_CHANNELS; i++) {
375 if (pchild->mon_type[i] == mon_type) {
376 if (++j == cpu) {
377 break;
378 }
379 }
380 }
381
382 if (j != cpu)
383 return 0;
384
385 /* Read data from address and port. */
386 data = envctrl_i2c_read_8591((unsigned char)pchild->addr,
387 (unsigned char)pchild->chnl_array[i].chnl_no);
388
389 /* Find decoding table. */
390 tbl = pchild->tables + pchild->tblprop_array[i].offset;
391
392 return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type,
393 pchild->tblprop_array[i].scale,
394 tbl, bufdata);
395}
396
397/* Function Description: Read noncpu-related data such as motherboard
398 * temperature.
399 * Return: Number of read bytes. Data is stored in bufdata in ascii format.
400 */
401static int envctrl_read_noncpu_info(struct i2c_child_t *pchild,
402 char mon_type, unsigned char *bufdata)
403{
404 unsigned char data;
405 int i;
406 char *tbl = NULL;
407
408 for (i = 0; i < PCF8584_MAX_CHANNELS; i++) {
409 if (pchild->mon_type[i] == mon_type)
410 break;
411 }
412
413 if (i >= PCF8584_MAX_CHANNELS)
414 return 0;
415
416 /* Read data from address and port. */
417 data = envctrl_i2c_read_8591((unsigned char)pchild->addr,
418 (unsigned char)pchild->chnl_array[i].chnl_no);
419
420 /* Find decoding table. */
421 tbl = pchild->tables + pchild->tblprop_array[i].offset;
422
423 return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type,
424 pchild->tblprop_array[i].scale,
425 tbl, bufdata);
426}
427
428/* Function Description: Read fan status.
429 * Return : Always 1 byte. Status stored in bufdata.
430 */
431static int envctrl_i2c_fan_status(struct i2c_child_t *pchild,
432 unsigned char data,
433 char *bufdata)
434{
435 unsigned char tmp, ret = 0;
436 int i, j = 0;
437
438 tmp = data & pchild->fan_mask;
439
440 if (tmp == pchild->fan_mask) {
441 /* All bits are on. All fans are functioning. */
442 ret = ENVCTRL_ALL_FANS_GOOD;
443 } else if (tmp == 0) {
444 /* No bits are on. No fans are functioning. */
445 ret = ENVCTRL_ALL_FANS_BAD;
446 } else {
447 /* Go through all channels, mark 'on' the matched bits.
448 * Notice that fan_mask may have discontiguous bits but
449 * return mask are always contiguous. For example if we
450 * monitor 4 fans at channels 0,1,2,4, the return mask
451 * should be 00010000 if only fan at channel 4 is working.
452 */
453 for (i = 0; i < PCF8584_MAX_CHANNELS;i++) {
454 if (pchild->fan_mask & chnls_mask[i]) {
455 if (!(chnls_mask[i] & tmp))
456 ret |= chnls_mask[j];
457
458 j++;
459 }
460 }
461 }
462
463 bufdata[0] = ret;
464 return 1;
465}
466
467/* Function Description: Read global addressing line.
468 * Return : Always 1 byte. Status stored in bufdata.
469 */
470static int envctrl_i2c_globaladdr(struct i2c_child_t *pchild,
471 unsigned char data,
472 char *bufdata)
473{
474 /* Translatation table is not necessary, as global
475 * addr is the integer value of the GA# bits.
476 *
477 * NOTE: MSB is documented as zero, but I see it as '1' always....
478 *
479 * -----------------------------------------------
480 * | 0 | FAL | DEG | GA4 | GA3 | GA2 | GA1 | GA0 |
481 * -----------------------------------------------
482 * GA0 - GA4 integer value of Global Address (backplane slot#)
483 * DEG 0 = cPCI Power supply output is starting to degrade
484 * 1 = cPCI Power supply output is OK
485 * FAL 0 = cPCI Power supply has failed
486 * 1 = cPCI Power supply output is OK
487 */
488 bufdata[0] = (data & ENVCTRL_GLOBALADDR_ADDR_MASK);
489 return 1;
490}
491
492/* Function Description: Read standard voltage and power supply status.
493 * Return : Always 1 byte. Status stored in bufdata.
494 */
495static unsigned char envctrl_i2c_voltage_status(struct i2c_child_t *pchild,
496 unsigned char data,
497 char *bufdata)
498{
499 unsigned char tmp, ret = 0;
500 int i, j = 0;
501
502 tmp = data & pchild->voltage_mask;
503
504 /* Two channels are used to monitor voltage and power supply. */
505 if (tmp == pchild->voltage_mask) {
506 /* All bits are on. Voltage and power supply are okay. */
507 ret = ENVCTRL_VOLTAGE_POWERSUPPLY_GOOD;
508 } else if (tmp == 0) {
509 /* All bits are off. Voltage and power supply are bad */
510 ret = ENVCTRL_VOLTAGE_POWERSUPPLY_BAD;
511 } else {
512 /* Either voltage or power supply has problem. */
513 for (i = 0; i < PCF8584_MAX_CHANNELS; i++) {
514 if (pchild->voltage_mask & chnls_mask[i]) {
515 j++;
516
517 /* Break out when there is a mismatch. */
518 if (!(chnls_mask[i] & tmp))
519 break;
520 }
521 }
522
523 /* Make a wish that hardware will always use the
524 * first channel for voltage and the second for
525 * power supply.
526 */
527 if (j == 1)
528 ret = ENVCTRL_VOLTAGE_BAD;
529 else
530 ret = ENVCTRL_POWERSUPPLY_BAD;
531 }
532
533 bufdata[0] = ret;
534 return 1;
535}
536
537/* Function Description: Read a byte from /dev/envctrl. Mapped to user read().
538 * Return: Number of read bytes. 0 for error.
539 */
540static ssize_t
541envctrl_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
542{
543 struct i2c_child_t *pchild;
544 unsigned char data[10];
545 int ret = 0;
546
547 /* Get the type of read as decided in ioctl() call.
548 * Find the appropriate i2c child.
549 * Get the data and put back to the user buffer.
550 */
551
552 switch ((int)(long)file->private_data) {
553 case ENVCTRL_RD_WARNING_TEMPERATURE:
554 if (warning_temperature == 0)
555 return 0;
556
557 data[0] = (unsigned char)(warning_temperature);
558 ret = 1;
559 if (copy_to_user(buf, data, ret))
560 ret = -EFAULT;
561 break;
562
563 case ENVCTRL_RD_SHUTDOWN_TEMPERATURE:
564 if (shutdown_temperature == 0)
565 return 0;
566
567 data[0] = (unsigned char)(shutdown_temperature);
568 ret = 1;
569 if (copy_to_user(buf, data, ret))
570 ret = -EFAULT;
571 break;
572
573 case ENVCTRL_RD_MTHRBD_TEMPERATURE:
574 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_MTHRBDTEMP_MON)))
575 return 0;
576 ret = envctrl_read_noncpu_info(pchild, ENVCTRL_MTHRBDTEMP_MON, data);
577 if (copy_to_user(buf, data, ret))
578 ret = -EFAULT;
579 break;
580
581 case ENVCTRL_RD_CPU_TEMPERATURE:
582 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_CPUTEMP_MON)))
583 return 0;
584 ret = envctrl_read_cpu_info(read_cpu, pchild, ENVCTRL_CPUTEMP_MON, data);
585
586 /* Reset cpu to the default cpu0. */
587 if (copy_to_user(buf, data, ret))
588 ret = -EFAULT;
589 break;
590
591 case ENVCTRL_RD_CPU_VOLTAGE:
592 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_CPUVOLTAGE_MON)))
593 return 0;
594 ret = envctrl_read_cpu_info(read_cpu, pchild, ENVCTRL_CPUVOLTAGE_MON, data);
595
596 /* Reset cpu to the default cpu0. */
597 if (copy_to_user(buf, data, ret))
598 ret = -EFAULT;
599 break;
600
601 case ENVCTRL_RD_SCSI_TEMPERATURE:
602 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_SCSITEMP_MON)))
603 return 0;
604 ret = envctrl_read_noncpu_info(pchild, ENVCTRL_SCSITEMP_MON, data);
605 if (copy_to_user(buf, data, ret))
606 ret = -EFAULT;
607 break;
608
609 case ENVCTRL_RD_ETHERNET_TEMPERATURE:
610 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_ETHERTEMP_MON)))
611 return 0;
612 ret = envctrl_read_noncpu_info(pchild, ENVCTRL_ETHERTEMP_MON, data);
613 if (copy_to_user(buf, data, ret))
614 ret = -EFAULT;
615 break;
616
617 case ENVCTRL_RD_FAN_STATUS:
618 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_FANSTAT_MON)))
619 return 0;
620 data[0] = envctrl_i2c_read_8574(pchild->addr);
621 ret = envctrl_i2c_fan_status(pchild,data[0], data);
622 if (copy_to_user(buf, data, ret))
623 ret = -EFAULT;
624 break;
625
626 case ENVCTRL_RD_GLOBALADDRESS:
627 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_GLOBALADDR_MON)))
628 return 0;
629 data[0] = envctrl_i2c_read_8574(pchild->addr);
630 ret = envctrl_i2c_globaladdr(pchild, data[0], data);
631 if (copy_to_user(buf, data, ret))
632 ret = -EFAULT;
633 break;
634
635 case ENVCTRL_RD_VOLTAGE_STATUS:
636 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_VOLTAGESTAT_MON)))
637 /* If voltage monitor not present, check for CPCI equivalent */
638 if (!(pchild = envctrl_get_i2c_child(ENVCTRL_GLOBALADDR_MON)))
639 return 0;
640 data[0] = envctrl_i2c_read_8574(pchild->addr);
641 ret = envctrl_i2c_voltage_status(pchild, data[0], data);
642 if (copy_to_user(buf, data, ret))
643 ret = -EFAULT;
644 break;
645
646 default:
647 break;
648
649 };
650
651 return ret;
652}
653
654/* Function Description: Command what to read. Mapped to user ioctl().
655 * Return: Gives 0 for implemented commands, -EINVAL otherwise.
656 */
657static int
658envctrl_ioctl(struct inode *inode, struct file *file,
659 unsigned int cmd, unsigned long arg)
660{
661 char __user *infobuf;
662
663 switch (cmd) {
664 case ENVCTRL_RD_WARNING_TEMPERATURE:
665 case ENVCTRL_RD_SHUTDOWN_TEMPERATURE:
666 case ENVCTRL_RD_MTHRBD_TEMPERATURE:
667 case ENVCTRL_RD_FAN_STATUS:
668 case ENVCTRL_RD_VOLTAGE_STATUS:
669 case ENVCTRL_RD_ETHERNET_TEMPERATURE:
670 case ENVCTRL_RD_SCSI_TEMPERATURE:
671 case ENVCTRL_RD_GLOBALADDRESS:
672 file->private_data = (void *)(long)cmd;
673 break;
674
675 case ENVCTRL_RD_CPU_TEMPERATURE:
676 case ENVCTRL_RD_CPU_VOLTAGE:
677 /* Check to see if application passes in any cpu number,
678 * the default is cpu0.
679 */
680 infobuf = (char __user *) arg;
681 if (infobuf == NULL) {
682 read_cpu = 0;
683 }else {
684 get_user(read_cpu, infobuf);
685 }
686
687 /* Save the command for use when reading. */
688 file->private_data = (void *)(long)cmd;
689 break;
690
691 default:
692 return -EINVAL;
693 };
694
695 return 0;
696}
697
698/* Function Description: open device. Mapped to user open().
699 * Return: Always 0.
700 */
701static int
702envctrl_open(struct inode *inode, struct file *file)
703{
704 file->private_data = NULL;
705 return 0;
706}
707
708/* Function Description: Open device. Mapped to user close().
709 * Return: Always 0.
710 */
711static int
712envctrl_release(struct inode *inode, struct file *file)
713{
714 return 0;
715}
716
717static struct file_operations envctrl_fops = {
718 .owner = THIS_MODULE,
719 .read = envctrl_read,
720 .ioctl = envctrl_ioctl,
721 .open = envctrl_open,
722 .release = envctrl_release,
723};
724
725static struct miscdevice envctrl_dev = {
726 ENVCTRL_MINOR,
727 "envctrl",
728 &envctrl_fops
729};
730
731/* Function Description: Set monitor type based on firmware description.
732 * Return: None.
733 */
734static void envctrl_set_mon(struct i2c_child_t *pchild,
735 char *chnl_desc,
736 int chnl_no)
737{
738 /* Firmware only has temperature type. It does not distinguish
739 * different kinds of temperatures. We use channel description
740 * to disinguish them.
741 */
742 if (!(strcmp(chnl_desc,"temp,cpu")) ||
743 !(strcmp(chnl_desc,"temp,cpu0")) ||
744 !(strcmp(chnl_desc,"temp,cpu1")) ||
745 !(strcmp(chnl_desc,"temp,cpu2")) ||
746 !(strcmp(chnl_desc,"temp,cpu3")))
747 pchild->mon_type[chnl_no] = ENVCTRL_CPUTEMP_MON;
748
749 if (!(strcmp(chnl_desc,"vddcore,cpu0")) ||
750 !(strcmp(chnl_desc,"vddcore,cpu1")) ||
751 !(strcmp(chnl_desc,"vddcore,cpu2")) ||
752 !(strcmp(chnl_desc,"vddcore,cpu3")))
753 pchild->mon_type[chnl_no] = ENVCTRL_CPUVOLTAGE_MON;
754
755 if (!(strcmp(chnl_desc,"temp,motherboard")))
756 pchild->mon_type[chnl_no] = ENVCTRL_MTHRBDTEMP_MON;
757
758 if (!(strcmp(chnl_desc,"temp,scsi")))
759 pchild->mon_type[chnl_no] = ENVCTRL_SCSITEMP_MON;
760
761 if (!(strcmp(chnl_desc,"temp,ethernet")))
762 pchild->mon_type[chnl_no] = ENVCTRL_ETHERTEMP_MON;
763}
764
765/* Function Description: Initialize monitor channel with channel desc,
766 * decoding tables, monitor type, optional properties.
767 * Return: None.
768 */
769static void envctrl_init_adc(struct i2c_child_t *pchild, int node)
770{
771 char chnls_desc[CHANNEL_DESC_SZ];
772 int i = 0, len;
773 char *pos = chnls_desc;
774
775 /* Firmware describe channels into a stream separated by a '\0'. */
776 len = prom_getproperty(node, "channels-description", chnls_desc,
777 CHANNEL_DESC_SZ);
778 chnls_desc[CHANNEL_DESC_SZ - 1] = '\0';
779
780 while (len > 0) {
781 int l = strlen(pos) + 1;
782 envctrl_set_mon(pchild, pos, i++);
783 len -= l;
784 pos += l;
785 }
786
787 /* Get optional properties. */
788 len = prom_getproperty(node, "warning-temp", (char *)&warning_temperature,
789 sizeof(warning_temperature));
790 len = prom_getproperty(node, "shutdown-temp", (char *)&shutdown_temperature,
791 sizeof(shutdown_temperature));
792}
793
794/* Function Description: Initialize child device monitoring fan status.
795 * Return: None.
796 */
797static void envctrl_init_fanstat(struct i2c_child_t *pchild)
798{
799 int i;
800
801 /* Go through all channels and set up the mask. */
802 for (i = 0; i < pchild->total_chnls; i++)
803 pchild->fan_mask |= chnls_mask[(pchild->chnl_array[i]).chnl_no];
804
805 /* We only need to know if this child has fan status monitored.
806 * We don't care which channels since we have the mask already.
807 */
808 pchild->mon_type[0] = ENVCTRL_FANSTAT_MON;
809}
810
811/* Function Description: Initialize child device for global addressing line.
812 * Return: None.
813 */
814static void envctrl_init_globaladdr(struct i2c_child_t *pchild)
815{
816 int i;
817
818 /* Voltage/PowerSupply monitoring is piggybacked
819 * with Global Address on CompactPCI. See comments
820 * within envctrl_i2c_globaladdr for bit assignments.
821 *
822 * The mask is created here by assigning mask bits to each
823 * bit position that represents PCF8584_VOLTAGE_TYPE data.
824 * Channel numbers are not consecutive within the globaladdr
825 * node (why?), so we use the actual counter value as chnls_mask
826 * index instead of the chnl_array[x].chnl_no value.
827 *
828 * NOTE: This loop could be replaced with a constant representing
829 * a mask of bits 5&6 (ENVCTRL_GLOBALADDR_PSTAT_MASK).
830 */
831 for (i = 0; i < pchild->total_chnls; i++) {
832 if (PCF8584_VOLTAGE_TYPE == pchild->chnl_array[i].type) {
833 pchild->voltage_mask |= chnls_mask[i];
834 }
835 }
836
837 /* We only need to know if this child has global addressing
838 * line monitored. We don't care which channels since we know
839 * the mask already (ENVCTRL_GLOBALADDR_ADDR_MASK).
840 */
841 pchild->mon_type[0] = ENVCTRL_GLOBALADDR_MON;
842}
843
844/* Initialize child device monitoring voltage status. */
845static void envctrl_init_voltage_status(struct i2c_child_t *pchild)
846{
847 int i;
848
849 /* Go through all channels and set up the mask. */
850 for (i = 0; i < pchild->total_chnls; i++)
851 pchild->voltage_mask |= chnls_mask[(pchild->chnl_array[i]).chnl_no];
852
853 /* We only need to know if this child has voltage status monitored.
854 * We don't care which channels since we have the mask already.
855 */
856 pchild->mon_type[0] = ENVCTRL_VOLTAGESTAT_MON;
857}
858
859/* Function Description: Initialize i2c child device.
860 * Return: None.
861 */
862static void envctrl_init_i2c_child(struct linux_ebus_child *edev_child,
863 struct i2c_child_t *pchild)
864{
865 int node, len, i, tbls_size = 0;
866
867 node = edev_child->prom_node;
868
869 /* Get device address. */
870 len = prom_getproperty(node, "reg",
871 (char *) &(pchild->addr),
872 sizeof(pchild->addr));
873
874 /* Get tables property. Read firmware temperature tables. */
875 len = prom_getproperty(node, "translation",
876 (char *) pchild->tblprop_array,
877 (PCF8584_MAX_CHANNELS *
878 sizeof(struct pcf8584_tblprop)));
879 if (len > 0) {
880 pchild->total_tbls = len / sizeof(struct pcf8584_tblprop);
881 for (i = 0; i < pchild->total_tbls; i++) {
882 if ((pchild->tblprop_array[i].size + pchild->tblprop_array[i].offset) > tbls_size) {
883 tbls_size = pchild->tblprop_array[i].size + pchild->tblprop_array[i].offset;
884 }
885 }
886
887 pchild->tables = kmalloc(tbls_size, GFP_KERNEL);
888 if (pchild->tables == NULL){
889 printk("envctrl: Failed to allocate table.\n");
890 return;
891 }
892 len = prom_getproperty(node, "tables",
893 (char *) pchild->tables, tbls_size);
894 if (len <= 0) {
895 printk("envctrl: Failed to get table.\n");
896 return;
897 }
898 }
899
900 /* SPARCengine ASM Reference Manual (ref. SMI doc 805-7581-04)
901 * sections 2.5, 3.5, 4.5 state node 0x70 for CP1400/1500 is
902 * "For Factory Use Only."
903 *
904 * We ignore the node on these platforms by assigning the
905 * 'NULL' monitor type.
906 */
907 if (ENVCTRL_CPCI_IGNORED_NODE == pchild->addr) {
908 int len;
909 char prop[56];
910
911 len = prom_getproperty(prom_root_node, "name", prop, sizeof(prop));
912 if (0 < len && (0 == strncmp(prop, "SUNW,UltraSPARC-IIi-cEngine", len)))
913 {
914 for (len = 0; len < PCF8584_MAX_CHANNELS; ++len) {
915 pchild->mon_type[len] = ENVCTRL_NOMON;
916 }
917 return;
918 }
919 }
920
921 /* Get the monitor channels. */
922 len = prom_getproperty(node, "channels-in-use",
923 (char *) pchild->chnl_array,
924 (PCF8584_MAX_CHANNELS *
925 sizeof(struct pcf8584_channel)));
926 pchild->total_chnls = len / sizeof(struct pcf8584_channel);
927
928 for (i = 0; i < pchild->total_chnls; i++) {
929 switch (pchild->chnl_array[i].type) {
930 case PCF8584_TEMP_TYPE:
931 envctrl_init_adc(pchild, node);
932 break;
933
934 case PCF8584_GLOBALADDR_TYPE:
935 envctrl_init_globaladdr(pchild);
936 i = pchild->total_chnls;
937 break;
938
939 case PCF8584_FANSTAT_TYPE:
940 envctrl_init_fanstat(pchild);
941 i = pchild->total_chnls;
942 break;
943
944 case PCF8584_VOLTAGE_TYPE:
945 if (pchild->i2ctype == I2C_ADC) {
946 envctrl_init_adc(pchild,node);
947 } else {
948 envctrl_init_voltage_status(pchild);
949 }
950 i = pchild->total_chnls;
951 break;
952
953 default:
954 break;
955 };
956 }
957}
958
959/* Function Description: Search the child device list for a device.
960 * Return : The i2c child if found. NULL otherwise.
961 */
962static struct i2c_child_t *envctrl_get_i2c_child(unsigned char mon_type)
963{
964 int i, j;
965
966 for (i = 0; i < ENVCTRL_MAX_CPU*2; i++) {
967 for (j = 0; j < PCF8584_MAX_CHANNELS; j++) {
968 if (i2c_childlist[i].mon_type[j] == mon_type) {
969 return (struct i2c_child_t *)(&(i2c_childlist[i]));
970 }
971 }
972 }
973 return NULL;
974}
975
976static void envctrl_do_shutdown(void)
977{
978 static int inprog = 0;
979 static char *envp[] = {
980 "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
981 char *argv[] = {
982 "/sbin/shutdown", "-h", "now", NULL };
983
984 if (inprog != 0)
985 return;
986
987 inprog = 1;
988 printk(KERN_CRIT "kenvctrld: WARNING: Shutting down the system now.\n");
989 if (0 > execve("/sbin/shutdown", argv, envp)) {
990 printk(KERN_CRIT "kenvctrld: WARNING: system shutdown failed!\n");
991 inprog = 0; /* unlikely to succeed, but we could try again */
992 }
993}
994
995static struct task_struct *kenvctrld_task;
996
997static int kenvctrld(void *__unused)
998{
999 int poll_interval;
1000 int whichcpu;
1001 char tempbuf[10];
1002 struct i2c_child_t *cputemp;
1003
1004 if (NULL == (cputemp = envctrl_get_i2c_child(ENVCTRL_CPUTEMP_MON))) {
1005 printk(KERN_ERR
1006 "envctrl: kenvctrld unable to monitor CPU temp-- exiting\n");
1007 return -ENODEV;
1008 }
1009
1010 poll_interval = 5 * HZ; /* TODO env_mon_interval */
1011
1012 daemonize("kenvctrld");
1013 allow_signal(SIGKILL);
1014
1015 kenvctrld_task = current;
1016
1017 printk(KERN_INFO "envctrl: %s starting...\n", current->comm);
1018 for (;;) {
1019 current->state = TASK_INTERRUPTIBLE;
1020 schedule_timeout(poll_interval);
1021
1022 if(signal_pending(current))
1023 break;
1024
1025 for (whichcpu = 0; whichcpu < ENVCTRL_MAX_CPU; ++whichcpu) {
1026 if (0 < envctrl_read_cpu_info(whichcpu, cputemp,
1027 ENVCTRL_CPUTEMP_MON,
1028 tempbuf)) {
1029 if (tempbuf[0] >= shutdown_temperature) {
1030 printk(KERN_CRIT
1031 "%s: WARNING: CPU%i temperature %i C meets or exceeds "\
1032 "shutdown threshold %i C\n",
1033 current->comm, whichcpu,
1034 tempbuf[0], shutdown_temperature);
1035 envctrl_do_shutdown();
1036 }
1037 }
1038 }
1039 }
1040 printk(KERN_INFO "envctrl: %s exiting...\n", current->comm);
1041 return 0;
1042}
1043
1044static int __init envctrl_init(void)
1045{
1046#ifdef CONFIG_PCI
1047 struct linux_ebus *ebus = NULL;
1048 struct linux_ebus_device *edev = NULL;
1049 struct linux_ebus_child *edev_child = NULL;
1050 int err, i = 0;
1051
1052 for_each_ebus(ebus) {
1053 for_each_ebusdev(edev, ebus) {
1054 if (!strcmp(edev->prom_name, "bbc")) {
1055 /* If we find a boot-bus controller node,
1056 * then this envctrl driver is not for us.
1057 */
1058 return -ENODEV;
1059 }
1060 }
1061 }
1062
1063 /* Traverse through ebus and ebus device list for i2c device and
1064 * adc and gpio nodes.
1065 */
1066 for_each_ebus(ebus) {
1067 for_each_ebusdev(edev, ebus) {
1068 if (!strcmp(edev->prom_name, "i2c")) {
1069 i2c = ioremap(edev->resource[0].start, 0x2);
1070 for_each_edevchild(edev, edev_child) {
1071 if (!strcmp("gpio", edev_child->prom_name)) {
1072 i2c_childlist[i].i2ctype = I2C_GPIO;
1073 envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
1074 }
1075 if (!strcmp("adc", edev_child->prom_name)) {
1076 i2c_childlist[i].i2ctype = I2C_ADC;
1077 envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
1078 }
1079 }
1080 goto done;
1081 }
1082 }
1083 }
1084
1085done:
1086 if (!edev) {
1087 printk("envctrl: I2C device not found.\n");
1088 return -ENODEV;
1089 }
1090
1091 /* Set device address. */
1092 writeb(CONTROL_PIN, i2c + PCF8584_CSR);
1093 writeb(PCF8584_ADDRESS, i2c + PCF8584_DATA);
1094
1095 /* Set system clock and SCL frequencies. */
1096 writeb(CONTROL_PIN | CONTROL_ES1, i2c + PCF8584_CSR);
1097 writeb(CLK_4_43 | BUS_CLK_90, i2c + PCF8584_DATA);
1098
1099 /* Enable serial interface. */
1100 writeb(CONTROL_PIN | CONTROL_ES0 | CONTROL_ACK, i2c + PCF8584_CSR);
1101 udelay(200);
1102
1103 /* Register the device as a minor miscellaneous device. */
1104 err = misc_register(&envctrl_dev);
1105 if (err) {
1106 printk("envctrl: Unable to get misc minor %d\n",
1107 envctrl_dev.minor);
1108 goto out_iounmap;
1109 }
1110
1111 /* Note above traversal routine post-incremented 'i' to accommodate
1112 * a next child device, so we decrement before reverse-traversal of
1113 * child devices.
1114 */
1115 printk("envctrl: initialized ");
1116 for (--i; i >= 0; --i) {
1117 printk("[%s 0x%lx]%s",
1118 (I2C_ADC == i2c_childlist[i].i2ctype) ? ("adc") :
1119 ((I2C_GPIO == i2c_childlist[i].i2ctype) ? ("gpio") : ("unknown")),
1120 i2c_childlist[i].addr, (0 == i) ? ("\n") : (" "));
1121 }
1122
1123 err = kernel_thread(kenvctrld, NULL, CLONE_FS | CLONE_FILES);
1124 if (err < 0)
1125 goto out_deregister;
1126
1127 return 0;
1128
1129out_deregister:
1130 misc_deregister(&envctrl_dev);
1131out_iounmap:
1132 iounmap(i2c);
1133 for (i = 0; i < ENVCTRL_MAX_CPU * 2; i++) {
1134 if (i2c_childlist[i].tables)
1135 kfree(i2c_childlist[i].tables);
1136 }
1137 return err;
1138#else
1139 return -ENODEV;
1140#endif
1141}
1142
1143static void __exit envctrl_cleanup(void)
1144{
1145 int i;
1146
1147 if (NULL != kenvctrld_task) {
1148 force_sig(SIGKILL, kenvctrld_task);
1149 for (;;) {
1150 struct task_struct *p;
1151 int found = 0;
1152
1153 read_lock(&tasklist_lock);
1154 for_each_process(p) {
1155 if (p == kenvctrld_task) {
1156 found = 1;
1157 break;
1158 }
1159 }
1160 read_unlock(&tasklist_lock);
1161
1162 if (!found)
1163 break;
1164
1165 msleep(1000);
1166 }
1167 kenvctrld_task = NULL;
1168 }
1169
1170 iounmap(i2c);
1171 misc_deregister(&envctrl_dev);
1172
1173 for (i = 0; i < ENVCTRL_MAX_CPU * 2; i++) {
1174 if (i2c_childlist[i].tables)
1175 kfree(i2c_childlist[i].tables);
1176 }
1177}
1178
1179module_init(envctrl_init);
1180module_exit(envctrl_cleanup);
1181MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c
new file mode 100644
index 00000000000..6bdd768b731
--- /dev/null
+++ b/drivers/sbus/char/flash.c
@@ -0,0 +1,255 @@
1/* $Id: flash.c,v 1.25 2001/12/21 04:56:16 davem Exp $
2 * flash.c: Allow mmap access to the OBP Flash, for OBP updates.
3 *
4 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
5 */
6
7#include <linux/config.h>
8#include <linux/module.h>
9#include <linux/types.h>
10#include <linux/errno.h>
11#include <linux/miscdevice.h>
12#include <linux/slab.h>
13#include <linux/fcntl.h>
14#include <linux/poll.h>
15#include <linux/init.h>
16#include <linux/smp_lock.h>
17#include <linux/spinlock.h>
18
19#include <asm/system.h>
20#include <asm/uaccess.h>
21#include <asm/pgtable.h>
22#include <asm/io.h>
23#include <asm/sbus.h>
24#include <asm/ebus.h>
25#include <asm/upa.h>
26
27static DEFINE_SPINLOCK(flash_lock);
28static struct {
29 unsigned long read_base; /* Physical read address */
30 unsigned long write_base; /* Physical write address */
31 unsigned long read_size; /* Size of read area */
32 unsigned long write_size; /* Size of write area */
33 unsigned long busy; /* In use? */
34} flash;
35
36#define FLASH_MINOR 152
37
38static int
39flash_mmap(struct file *file, struct vm_area_struct *vma)
40{
41 unsigned long addr;
42 unsigned long size;
43
44 spin_lock(&flash_lock);
45 if (flash.read_base == flash.write_base) {
46 addr = flash.read_base;
47 size = flash.read_size;
48 } else {
49 if ((vma->vm_flags & VM_READ) &&
50 (vma->vm_flags & VM_WRITE)) {
51 spin_unlock(&flash_lock);
52 return -EINVAL;
53 }
54 if (vma->vm_flags & VM_READ) {
55 addr = flash.read_base;
56 size = flash.read_size;
57 } else if (vma->vm_flags & VM_WRITE) {
58 addr = flash.write_base;
59 size = flash.write_size;
60 } else {
61 spin_unlock(&flash_lock);
62 return -ENXIO;
63 }
64 }
65 spin_unlock(&flash_lock);
66
67 if ((vma->vm_pgoff << PAGE_SHIFT) > size)
68 return -ENXIO;
69 addr = vma->vm_pgoff + (addr >> PAGE_SHIFT);
70
71 if (vma->vm_end - (vma->vm_start + (vma->vm_pgoff << PAGE_SHIFT)) > size)
72 size = vma->vm_end - (vma->vm_start + (vma->vm_pgoff << PAGE_SHIFT));
73
74 pgprot_val(vma->vm_page_prot) &= ~(_PAGE_CACHE);
75 pgprot_val(vma->vm_page_prot) |= _PAGE_E;
76 vma->vm_flags |= (VM_SHM | VM_LOCKED);
77
78 if (io_remap_pfn_range(vma, vma->vm_start, addr, size, vma->vm_page_prot))
79 return -EAGAIN;
80
81 return 0;
82}
83
84static long long
85flash_llseek(struct file *file, long long offset, int origin)
86{
87 lock_kernel();
88 switch (origin) {
89 case 0:
90 file->f_pos = offset;
91 break;
92 case 1:
93 file->f_pos += offset;
94 if (file->f_pos > flash.read_size)
95 file->f_pos = flash.read_size;
96 break;
97 case 2:
98 file->f_pos = flash.read_size;
99 break;
100 default:
101 unlock_kernel();
102 return -EINVAL;
103 }
104 unlock_kernel();
105 return file->f_pos;
106}
107
108static ssize_t
109flash_read(struct file * file, char __user * buf,
110 size_t count, loff_t *ppos)
111{
112 unsigned long p = file->f_pos;
113 int i;
114
115 if (count > flash.read_size - p)
116 count = flash.read_size - p;
117
118 for (i = 0; i < count; i++) {
119 u8 data = upa_readb(flash.read_base + p + i);
120 if (put_user(data, buf))
121 return -EFAULT;
122 buf++;
123 }
124
125 file->f_pos += count;
126 return count;
127}
128
129static int
130flash_open(struct inode *inode, struct file *file)
131{
132 if (test_and_set_bit(0, (void *)&flash.busy) != 0)
133 return -EBUSY;
134
135 return 0;
136}
137
138static int
139flash_release(struct inode *inode, struct file *file)
140{
141 spin_lock(&flash_lock);
142 flash.busy = 0;
143 spin_unlock(&flash_lock);
144
145 return 0;
146}
147
148static struct file_operations flash_fops = {
149 /* no write to the Flash, use mmap
150 * and play flash dependent tricks.
151 */
152 .owner = THIS_MODULE,
153 .llseek = flash_llseek,
154 .read = flash_read,
155 .mmap = flash_mmap,
156 .open = flash_open,
157 .release = flash_release,
158};
159
160static struct miscdevice flash_dev = { FLASH_MINOR, "flash", &flash_fops };
161
162static int __init flash_init(void)
163{
164 struct sbus_bus *sbus;
165 struct sbus_dev *sdev = NULL;
166#ifdef CONFIG_PCI
167 struct linux_ebus *ebus;
168 struct linux_ebus_device *edev = NULL;
169 struct linux_prom_registers regs[2];
170 int len, nregs;
171#endif
172 int err;
173
174 for_all_sbusdev(sdev, sbus) {
175 if (!strcmp(sdev->prom_name, "flashprom")) {
176 if (sdev->reg_addrs[0].phys_addr == sdev->reg_addrs[1].phys_addr) {
177 flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
178 (((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
179 flash.read_size = sdev->reg_addrs[0].reg_size;
180 flash.write_base = flash.read_base;
181 flash.write_size = flash.read_size;
182 } else {
183 flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
184 (((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
185 flash.read_size = sdev->reg_addrs[0].reg_size;
186 flash.write_base = ((unsigned long)sdev->reg_addrs[1].phys_addr) |
187 (((unsigned long)sdev->reg_addrs[1].which_io)<<32UL);
188 flash.write_size = sdev->reg_addrs[1].reg_size;
189 }
190 flash.busy = 0;
191 break;
192 }
193 }
194 if (!sdev) {
195#ifdef CONFIG_PCI
196 for_each_ebus(ebus) {
197 for_each_ebusdev(edev, ebus) {
198 if (!strcmp(edev->prom_name, "flashprom"))
199 goto ebus_done;
200 }
201 }
202 ebus_done:
203 if (!edev)
204 return -ENODEV;
205
206 len = prom_getproperty(edev->prom_node, "reg", (void *)regs, sizeof(regs));
207 if ((len % sizeof(regs[0])) != 0) {
208 printk("flash: Strange reg property size %d\n", len);
209 return -ENODEV;
210 }
211
212 nregs = len / sizeof(regs[0]);
213
214 flash.read_base = edev->resource[0].start;
215 flash.read_size = regs[0].reg_size;
216
217 if (nregs == 1) {
218 flash.write_base = edev->resource[0].start;
219 flash.write_size = regs[0].reg_size;
220 } else if (nregs == 2) {
221 flash.write_base = edev->resource[1].start;
222 flash.write_size = regs[1].reg_size;
223 } else {
224 printk("flash: Strange number of regs %d\n", nregs);
225 return -ENODEV;
226 }
227
228 flash.busy = 0;
229
230#else
231 return -ENODEV;
232#endif
233 }
234
235 printk("OBP Flash: RD %lx[%lx] WR %lx[%lx]\n",
236 flash.read_base, flash.read_size,
237 flash.write_base, flash.write_size);
238
239 err = misc_register(&flash_dev);
240 if (err) {
241 printk(KERN_ERR "flash: unable to get misc minor\n");
242 return err;
243 }
244
245 return 0;
246}
247
248static void __exit flash_cleanup(void)
249{
250 misc_deregister(&flash_dev);
251}
252
253module_init(flash_init);
254module_exit(flash_cleanup);
255MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/jsflash.c b/drivers/sbus/char/jsflash.c
new file mode 100644
index 00000000000..c12c5046e2f
--- /dev/null
+++ b/drivers/sbus/char/jsflash.c
@@ -0,0 +1,627 @@
1/*
2 * drivers/sbus/char/jsflash.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds (drivers/char/mem.c)
5 * Copyright (C) 1997 Eddie C. Dost (drivers/sbus/char/flash.c)
6 * Copyright (C) 1997-2000 Pavel Machek <pavel@ucw.cz> (drivers/block/nbd.c)
7 * Copyright (C) 1999-2000 Pete Zaitcev
8 *
9 * This driver is used to program OS into a Flash SIMM on
10 * Krups and Espresso platforms.
11 *
12 * TODO: do not allow erase/programming if file systems are mounted.
13 * TODO: Erase/program both banks of a 8MB SIMM.
14 *
15 * It is anticipated that programming an OS Flash will be a routine
16 * procedure. In the same time it is exeedingly dangerous because
17 * a user can program its OBP flash with OS image and effectively
18 * kill the machine.
19 *
20 * This driver uses an interface different from Eddie's flash.c
21 * as a silly safeguard.
22 *
23 * XXX The flash.c manipulates page caching characteristics in a certain
24 * dubious way; also it assumes that remap_pfn_range() can remap
25 * PCI bus locations, which may be false. ioremap() must be used
26 * instead. We should discuss this.
27 */
28
29#include <linux/module.h>
30#include <linux/types.h>
31#include <linux/errno.h>
32#include <linux/miscdevice.h>
33#include <linux/slab.h>
34#include <linux/fcntl.h>
35#include <linux/poll.h>
36#include <linux/init.h>
37#include <linux/string.h>
38#include <linux/smp_lock.h>
39#include <linux/genhd.h>
40#include <linux/blkdev.h>
41
42#define MAJOR_NR JSFD_MAJOR
43
44#include <asm/uaccess.h>
45#include <asm/pgtable.h>
46#include <asm/io.h>
47#include <asm/pcic.h>
48#include <asm/oplib.h>
49
50#include <asm/jsflash.h> /* ioctl arguments. <linux/> ?? */
51#define JSFIDSZ (sizeof(struct jsflash_ident_arg))
52#define JSFPRGSZ (sizeof(struct jsflash_program_arg))
53
54/*
55 * Our device numbers have no business in system headers.
56 * The only thing a user knows is the device name /dev/jsflash.
57 *
58 * Block devices are laid out like this:
59 * minor+0 - Bootstrap, for 8MB SIMM 0x20400000[0x800000]
60 * minor+1 - Filesystem to mount, normally 0x20400400[0x7ffc00]
61 * minor+2 - Whole flash area for any case... 0x20000000[0x01000000]
62 * Total 3 minors per flash device.
63 *
64 * It is easier to have static size vectors, so we define
65 * a total minor range JSF_MAX, which must cover all minors.
66 */
67/* character device */
68#define JSF_MINOR 178 /* 178 is registered with hpa */
69/* block device */
70#define JSF_MAX 3 /* 3 minors wasted total so far. */
71#define JSF_NPART 3 /* 3 minors per flash device */
72#define JSF_PART_BITS 2 /* 2 bits of minors to cover JSF_NPART */
73#define JSF_PART_MASK 0x3 /* 2 bits mask */
74
75/*
76 * Access functions.
77 * We could ioremap(), but it's easier this way.
78 */
79static unsigned int jsf_inl(unsigned long addr)
80{
81 unsigned long retval;
82
83 __asm__ __volatile__("lda [%1] %2, %0\n\t" :
84 "=r" (retval) :
85 "r" (addr), "i" (ASI_M_BYPASS));
86 return retval;
87}
88
89static void jsf_outl(unsigned long addr, __u32 data)
90{
91
92 __asm__ __volatile__("sta %0, [%1] %2\n\t" : :
93 "r" (data), "r" (addr), "i" (ASI_M_BYPASS) :
94 "memory");
95}
96
97/*
98 * soft carrier
99 */
100
101struct jsfd_part {
102 unsigned long dbase;
103 unsigned long dsize;
104};
105
106struct jsflash {
107 unsigned long base;
108 unsigned long size;
109 unsigned long busy; /* In use? */
110 struct jsflash_ident_arg id;
111 /* int mbase; */ /* Minor base, typically zero */
112 struct jsfd_part dv[JSF_NPART];
113};
114
115/*
116 * We do not map normal memory or obio as a safety precaution.
117 * But offsets are real, for ease of userland programming.
118 */
119#define JSF_BASE_TOP 0x30000000
120#define JSF_BASE_ALL 0x20000000
121
122#define JSF_BASE_JK 0x20400000
123
124/*
125 */
126static struct gendisk *jsfd_disk[JSF_MAX];
127
128/*
129 * Let's pretend we may have several of these...
130 */
131static struct jsflash jsf0;
132
133/*
134 * Wait for AMD to finish its embedded algorithm.
135 * We use the Toggle bit DQ6 (0x40) because it does not
136 * depend on the data value as /DATA bit DQ7 does.
137 *
138 * XXX Do we need any timeout here? So far it never hanged, beware broken hw.
139 */
140static void jsf_wait(unsigned long p) {
141 unsigned int x1, x2;
142
143 for (;;) {
144 x1 = jsf_inl(p);
145 x2 = jsf_inl(p);
146 if ((x1 & 0x40404040) == (x2 & 0x40404040)) return;
147 }
148}
149
150/*
151 * Programming will only work if Flash is clean,
152 * we leave it to the programmer application.
153 *
154 * AMD must be programmed one byte at a time;
155 * thus, Simple Tech SIMM must be written 4 bytes at a time.
156 *
157 * Write waits for the chip to become ready after the write
158 * was finished. This is done so that application would read
159 * consistent data after the write is done.
160 */
161static void jsf_write4(unsigned long fa, u32 data) {
162
163 jsf_outl(fa, 0xAAAAAAAA); /* Unlock 1 Write 1 */
164 jsf_outl(fa, 0x55555555); /* Unlock 1 Write 2 */
165 jsf_outl(fa, 0xA0A0A0A0); /* Byte Program */
166 jsf_outl(fa, data);
167
168 jsf_wait(fa);
169}
170
171/*
172 */
173static void jsfd_read(char *buf, unsigned long p, size_t togo) {
174 union byte4 {
175 char s[4];
176 unsigned int n;
177 } b;
178
179 while (togo >= 4) {
180 togo -= 4;
181 b.n = jsf_inl(p);
182 memcpy(buf, b.s, 4);
183 p += 4;
184 buf += 4;
185 }
186}
187
188static void jsfd_do_request(request_queue_t *q)
189{
190 struct request *req;
191
192 while ((req = elv_next_request(q)) != NULL) {
193 struct jsfd_part *jdp = req->rq_disk->private_data;
194 unsigned long offset = req->sector << 9;
195 size_t len = req->current_nr_sectors << 9;
196
197 if ((offset + len) > jdp->dsize) {
198 end_request(req, 0);
199 continue;
200 }
201
202 if (rq_data_dir(req) != READ) {
203 printk(KERN_ERR "jsfd: write\n");
204 end_request(req, 0);
205 continue;
206 }
207
208 if ((jdp->dbase & 0xff000000) != 0x20000000) {
209 printk(KERN_ERR "jsfd: bad base %x\n", (int)jdp->dbase);
210 end_request(req, 0);
211 continue;
212 }
213
214 jsfd_read(req->buffer, jdp->dbase + offset, len);
215
216 end_request(req, 1);
217 }
218}
219
220/*
221 * The memory devices use the full 32/64 bits of the offset, and so we cannot
222 * check against negative addresses: they are ok. The return value is weird,
223 * though, in that case (0).
224 *
225 * also note that seeking relative to the "end of file" isn't supported:
226 * it has no meaning, so it returns -EINVAL.
227 */
228static loff_t jsf_lseek(struct file * file, loff_t offset, int orig)
229{
230 loff_t ret;
231
232 lock_kernel();
233 switch (orig) {
234 case 0:
235 file->f_pos = offset;
236 ret = file->f_pos;
237 break;
238 case 1:
239 file->f_pos += offset;
240 ret = file->f_pos;
241 break;
242 default:
243 ret = -EINVAL;
244 }
245 unlock_kernel();
246 return ret;
247}
248
249/*
250 * OS SIMM Cannot be read in other size but a 32bits word.
251 */
252static ssize_t jsf_read(struct file * file, char * buf,
253 size_t togo, loff_t *ppos)
254{
255 unsigned long p = *ppos;
256 char *tmp = buf;
257
258 union byte4 {
259 char s[4];
260 unsigned int n;
261 } b;
262
263 if (p < JSF_BASE_ALL || p >= JSF_BASE_TOP) {
264 return 0;
265 }
266
267 if ((p + togo) < p /* wrap */
268 || (p + togo) >= JSF_BASE_TOP) {
269 togo = JSF_BASE_TOP - p;
270 }
271
272 if (p < JSF_BASE_ALL && togo != 0) {
273#if 0 /* __bzero XXX */
274 size_t x = JSF_BASE_ALL - p;
275 if (x > togo) x = togo;
276 clear_user(tmp, x);
277 tmp += x;
278 p += x;
279 togo -= x;
280#else
281 /*
282 * Implementation of clear_user() calls __bzero
283 * without regard to modversions,
284 * so we cannot build a module.
285 */
286 return 0;
287#endif
288 }
289
290 while (togo >= 4) {
291 togo -= 4;
292 b.n = jsf_inl(p);
293 if (copy_to_user(tmp, b.s, 4))
294 return -EFAULT;
295 tmp += 4;
296 p += 4;
297 }
298
299 /*
300 * XXX Small togo may remain if 1 byte is ordered.
301 * It would be nice if we did a word size read and unpacked it.
302 */
303
304 *ppos = p;
305 return tmp-buf;
306}
307
308static ssize_t jsf_write(struct file * file, const char * buf,
309 size_t count, loff_t *ppos)
310{
311 return -ENOSPC;
312}
313
314/*
315 */
316static int jsf_ioctl_erase(unsigned long arg)
317{
318 unsigned long p;
319
320 /* p = jsf0.base; hits wrong bank */
321 p = 0x20400000;
322
323 jsf_outl(p, 0xAAAAAAAA); /* Unlock 1 Write 1 */
324 jsf_outl(p, 0x55555555); /* Unlock 1 Write 2 */
325 jsf_outl(p, 0x80808080); /* Erase setup */
326 jsf_outl(p, 0xAAAAAAAA); /* Unlock 2 Write 1 */
327 jsf_outl(p, 0x55555555); /* Unlock 2 Write 2 */
328 jsf_outl(p, 0x10101010); /* Chip erase */
329
330#if 0
331 /*
332 * This code is ok, except that counter based timeout
333 * has no place in this world. Let's just drop timeouts...
334 */
335 {
336 int i;
337 __u32 x;
338 for (i = 0; i < 1000000; i++) {
339 x = jsf_inl(p);
340 if ((x & 0x80808080) == 0x80808080) break;
341 }
342 if ((x & 0x80808080) != 0x80808080) {
343 printk("jsf0: erase timeout with 0x%08x\n", x);
344 } else {
345 printk("jsf0: erase done with 0x%08x\n", x);
346 }
347 }
348#else
349 jsf_wait(p);
350#endif
351
352 return 0;
353}
354
355/*
356 * Program a block of flash.
357 * Very simple because we can do it byte by byte anyway.
358 */
359static int jsf_ioctl_program(unsigned long arg)
360{
361 struct jsflash_program_arg abuf;
362 char *uptr;
363 unsigned long p;
364 unsigned int togo;
365 union {
366 unsigned int n;
367 char s[4];
368 } b;
369
370 if (copy_from_user(&abuf, (char *)arg, JSFPRGSZ))
371 return -EFAULT;
372 p = abuf.off;
373 togo = abuf.size;
374 if ((togo & 3) || (p & 3)) return -EINVAL;
375
376 uptr = (char *) (unsigned long) abuf.data;
377 while (togo != 0) {
378 togo -= 4;
379 if (copy_from_user(&b.s[0], uptr, 4))
380 return -EFAULT;
381 jsf_write4(p, b.n);
382 p += 4;
383 uptr += 4;
384 }
385
386 return 0;
387}
388
389static int jsf_ioctl(struct inode *inode, struct file *f, unsigned int cmd,
390 unsigned long arg)
391{
392 int error = -ENOTTY;
393
394 if (!capable(CAP_SYS_ADMIN))
395 return -EPERM;
396 switch (cmd) {
397 case JSFLASH_IDENT:
398 if (copy_to_user((void *)arg, &jsf0.id, JSFIDSZ))
399 return -EFAULT;
400 break;
401 case JSFLASH_ERASE:
402 error = jsf_ioctl_erase(arg);
403 break;
404 case JSFLASH_PROGRAM:
405 error = jsf_ioctl_program(arg);
406 break;
407 }
408
409 return error;
410}
411
412static int jsf_mmap(struct file * file, struct vm_area_struct * vma)
413{
414 return -ENXIO;
415}
416
417static int jsf_open(struct inode * inode, struct file * filp)
418{
419
420 if (jsf0.base == 0) return -ENXIO;
421 if (test_and_set_bit(0, (void *)&jsf0.busy) != 0)
422 return -EBUSY;
423
424 return 0; /* XXX What security? */
425}
426
427static int jsf_release(struct inode *inode, struct file *file)
428{
429 jsf0.busy = 0;
430 return 0;
431}
432
433static struct file_operations jsf_fops = {
434 .owner = THIS_MODULE,
435 .llseek = jsf_lseek,
436 .read = jsf_read,
437 .write = jsf_write,
438 .ioctl = jsf_ioctl,
439 .mmap = jsf_mmap,
440 .open = jsf_open,
441 .release = jsf_release,
442};
443
444static struct miscdevice jsf_dev = { JSF_MINOR, "jsflash", &jsf_fops };
445
446static struct block_device_operations jsfd_fops = {
447 .owner = THIS_MODULE,
448};
449
450static int jsflash_init(void)
451{
452 int rc;
453 struct jsflash *jsf;
454 int node;
455 char banner[128];
456 struct linux_prom_registers reg0;
457
458 node = prom_getchild(prom_root_node);
459 node = prom_searchsiblings(node, "flash-memory");
460 if (node != 0 && node != -1) {
461 if (prom_getproperty(node, "reg",
462 (char *)&reg0, sizeof(reg0)) == -1) {
463 printk("jsflash: no \"reg\" property\n");
464 return -ENXIO;
465 }
466 if (reg0.which_io != 0) {
467 printk("jsflash: bus number nonzero: 0x%x:%x\n",
468 reg0.which_io, reg0.phys_addr);
469 return -ENXIO;
470 }
471 /*
472 * Flash may be somewhere else, for instance on Ebus.
473 * So, don't do the following check for IIep flash space.
474 */
475#if 0
476 if ((reg0.phys_addr >> 24) != 0x20) {
477 printk("jsflash: suspicious address: 0x%x:%x\n",
478 reg0.which_io, reg0.phys_addr);
479 return -ENXIO;
480 }
481#endif
482 if ((int)reg0.reg_size <= 0) {
483 printk("jsflash: bad size 0x%x\n", (int)reg0.reg_size);
484 return -ENXIO;
485 }
486 } else {
487 /* XXX Remove this code once PROLL ID12 got widespread */
488 printk("jsflash: no /flash-memory node, use PROLL >= 12\n");
489 prom_getproperty(prom_root_node, "banner-name", banner, 128);
490 if (strcmp (banner, "JavaStation-NC") != 0 &&
491 strcmp (banner, "JavaStation-E") != 0) {
492 return -ENXIO;
493 }
494 reg0.which_io = 0;
495 reg0.phys_addr = 0x20400000;
496 reg0.reg_size = 0x00800000;
497 }
498
499 /* Let us be really paranoid for modifications to probing code. */
500 /* extern enum sparc_cpu sparc_cpu_model; */ /* in <asm/system.h> */
501 if (sparc_cpu_model != sun4m) {
502 /* We must be on sun4m because we use MMU Bypass ASI. */
503 return -ENXIO;
504 }
505
506 if (jsf0.base == 0) {
507 jsf = &jsf0;
508
509 jsf->base = reg0.phys_addr;
510 jsf->size = reg0.reg_size;
511
512 /* XXX Redo the userland interface. */
513 jsf->id.off = JSF_BASE_ALL;
514 jsf->id.size = 0x01000000; /* 16M - all segments */
515 strcpy(jsf->id.name, "Krups_all");
516
517 jsf->dv[0].dbase = jsf->base;
518 jsf->dv[0].dsize = jsf->size;
519 jsf->dv[1].dbase = jsf->base + 1024;
520 jsf->dv[1].dsize = jsf->size - 1024;
521 jsf->dv[2].dbase = JSF_BASE_ALL;
522 jsf->dv[2].dsize = 0x01000000;
523
524 printk("Espresso Flash @0x%lx [%d MB]\n", jsf->base,
525 (int) (jsf->size / (1024*1024)));
526 }
527
528 if ((rc = misc_register(&jsf_dev)) != 0) {
529 printk(KERN_ERR "jsf: unable to get misc minor %d\n",
530 JSF_MINOR);
531 jsf0.base = 0;
532 return rc;
533 }
534
535 return 0;
536}
537
538static struct request_queue *jsf_queue;
539
540static int jsfd_init(void)
541{
542 static DEFINE_SPINLOCK(lock);
543 struct jsflash *jsf;
544 struct jsfd_part *jdp;
545 int err;
546 int i;
547
548 if (jsf0.base == 0)
549 return -ENXIO;
550
551 err = -ENOMEM;
552 for (i = 0; i < JSF_MAX; i++) {
553 struct gendisk *disk = alloc_disk(1);
554 if (!disk)
555 goto out;
556 jsfd_disk[i] = disk;
557 }
558
559 if (register_blkdev(JSFD_MAJOR, "jsfd")) {
560 err = -EIO;
561 goto out;
562 }
563
564 jsf_queue = blk_init_queue(jsfd_do_request, &lock);
565 if (!jsf_queue) {
566 err = -ENOMEM;
567 unregister_blkdev(JSFD_MAJOR, "jsfd");
568 goto out;
569 }
570
571 for (i = 0; i < JSF_MAX; i++) {
572 struct gendisk *disk = jsfd_disk[i];
573 if ((i & JSF_PART_MASK) >= JSF_NPART) continue;
574 jsf = &jsf0; /* actually, &jsfv[i >> JSF_PART_BITS] */
575 jdp = &jsf->dv[i&JSF_PART_MASK];
576
577 disk->major = JSFD_MAJOR;
578 disk->first_minor = i;
579 sprintf(disk->disk_name, "jsfd%d", i);
580 disk->fops = &jsfd_fops;
581 set_capacity(disk, jdp->dsize >> 9);
582 disk->private_data = jdp;
583 disk->queue = jsf_queue;
584 add_disk(disk);
585 set_disk_ro(disk, 1);
586 }
587 return 0;
588out:
589 while (i--)
590 put_disk(jsfd_disk[i]);
591 return err;
592}
593
594MODULE_LICENSE("GPL");
595
596static int __init jsflash_init_module(void) {
597 int rc;
598
599 if ((rc = jsflash_init()) == 0) {
600 jsfd_init();
601 return 0;
602 }
603 return rc;
604}
605
606static void __exit jsflash_cleanup_module(void)
607{
608 int i;
609
610 for (i = 0; i < JSF_MAX; i++) {
611 if ((i & JSF_PART_MASK) >= JSF_NPART) continue;
612 del_gendisk(jsfd_disk[i]);
613 put_disk(jsfd_disk[i]);
614 }
615 if (jsf0.busy)
616 printk("jsf0: cleaning busy unit\n");
617 jsf0.base = 0;
618 jsf0.busy = 0;
619
620 misc_deregister(&jsf_dev);
621 if (unregister_blkdev(JSFD_MAJOR, "jsfd") != 0)
622 printk("jsfd: cleanup_module failed\n");
623 blk_cleanup_queue(jsf_queue);
624}
625
626module_init(jsflash_init_module);
627module_exit(jsflash_cleanup_module);
diff --git a/drivers/sbus/char/max1617.h b/drivers/sbus/char/max1617.h
new file mode 100644
index 00000000000..0bb09c286cb
--- /dev/null
+++ b/drivers/sbus/char/max1617.h
@@ -0,0 +1,27 @@
1/* $Id: max1617.h,v 1.1 2001/04/02 09:59:08 davem Exp $ */
2#ifndef _MAX1617_H
3#define _MAX1617_H
4
5#define MAX1617_AMB_TEMP 0x00 /* Ambient temp in C */
6#define MAX1617_CPU_TEMP 0x01 /* Processor die temp in C */
7#define MAX1617_STATUS 0x02 /* Chip status bits */
8
9/* Read-only versions of changable registers. */
10#define MAX1617_RD_CFG_BYTE 0x03 /* Config register */
11#define MAX1617_RD_CVRATE_BYTE 0x04 /* Temp conversion rate */
12#define MAX1617_RD_AMB_HIGHLIM 0x05 /* Ambient high limit */
13#define MAX1617_RD_AMB_LOWLIM 0x06 /* Ambient low limit */
14#define MAX1617_RD_CPU_HIGHLIM 0x07 /* Processor high limit */
15#define MAX1617_RD_CPU_LOWLIM 0x08 /* Processor low limit */
16
17/* Write-only versions of the same. */
18#define MAX1617_WR_CFG_BYTE 0x09
19#define MAX1617_WR_CVRATE_BYTE 0x0a
20#define MAX1617_WR_AMB_HIGHLIM 0x0b
21#define MAX1617_WR_AMB_LOWLIM 0x0c
22#define MAX1617_WR_CPU_HIGHLIM 0x0d
23#define MAX1617_WR_CPU_LOWLIM 0x0e
24
25#define MAX1617_ONESHOT 0x0f
26
27#endif /* _MAX1617_H */
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
new file mode 100644
index 00000000000..58ed3374957
--- /dev/null
+++ b/drivers/sbus/char/openprom.c
@@ -0,0 +1,630 @@
1/*
2 * Linux/SPARC PROM Configuration Driver
3 * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu)
4 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
5 *
6 * This character device driver allows user programs to access the
7 * PROM device tree. It is compatible with the SunOS /dev/openprom
8 * driver and the NetBSD /dev/openprom driver. The SunOS eeprom
9 * utility works without any modifications.
10 *
11 * The driver uses a minor number under the misc device major. The
12 * file read/write mode determines the type of access to the PROM.
13 * Interrupts are disabled whenever the driver calls into the PROM for
14 * sanity's sake.
15 */
16
17/* This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of the
20 * License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful, but
23 * WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 */
31
32#define PROMLIB_INTERNAL
33
34#include <linux/config.h>
35#include <linux/module.h>
36#include <linux/kernel.h>
37#include <linux/sched.h>
38#include <linux/errno.h>
39#include <linux/slab.h>
40#include <linux/string.h>
41#include <linux/miscdevice.h>
42#include <linux/init.h>
43#include <linux/fs.h>
44#include <asm/oplib.h>
45#include <asm/system.h>
46#include <asm/uaccess.h>
47#include <asm/openpromio.h>
48#ifdef CONFIG_PCI
49#include <linux/pci.h>
50#include <asm/pbm.h>
51#endif
52
53/* Private data kept by the driver for each descriptor. */
54typedef struct openprom_private_data
55{
56 int current_node; /* Current node for SunOS ioctls. */
57 int lastnode; /* Last valid node used by BSD ioctls. */
58} DATA;
59
60/* ID of the PROM node containing all of the EEPROM options. */
61static int options_node = 0;
62
63/*
64 * Copy an openpromio structure into kernel space from user space.
65 * This routine does error checking to make sure that all memory
66 * accesses are within bounds. A pointer to the allocated openpromio
67 * structure will be placed in "*opp_p". Return value is the length
68 * of the user supplied buffer.
69 */
70static int copyin(struct openpromio __user *info, struct openpromio **opp_p)
71{
72 unsigned int bufsize;
73
74 if (!info || !opp_p)
75 return -EFAULT;
76
77 if (get_user(bufsize, &info->oprom_size))
78 return -EFAULT;
79
80 if (bufsize == 0)
81 return -EINVAL;
82
83 /* If the bufsize is too large, just limit it.
84 * Fix from Jason Rappleye.
85 */
86 if (bufsize > OPROMMAXPARAM)
87 bufsize = OPROMMAXPARAM;
88
89 if (!(*opp_p = kmalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
90 return -ENOMEM;
91 memset(*opp_p, 0, sizeof(int) + bufsize + 1);
92
93 if (copy_from_user(&(*opp_p)->oprom_array,
94 &info->oprom_array, bufsize)) {
95 kfree(*opp_p);
96 return -EFAULT;
97 }
98 return bufsize;
99}
100
101static int getstrings(struct openpromio __user *info, struct openpromio **opp_p)
102{
103 int n, bufsize;
104 char c;
105
106 if (!info || !opp_p)
107 return -EFAULT;
108
109 if (!(*opp_p = kmalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
110 return -ENOMEM;
111
112 memset(*opp_p, 0, sizeof(int) + OPROMMAXPARAM + 1);
113 (*opp_p)->oprom_size = 0;
114
115 n = bufsize = 0;
116 while ((n < 2) && (bufsize < OPROMMAXPARAM)) {
117 if (get_user(c, &info->oprom_array[bufsize])) {
118 kfree(*opp_p);
119 return -EFAULT;
120 }
121 if (c == '\0')
122 n++;
123 (*opp_p)->oprom_array[bufsize++] = c;
124 }
125 if (!n) {
126 kfree(*opp_p);
127 return -EINVAL;
128 }
129 return bufsize;
130}
131
132/*
133 * Copy an openpromio structure in kernel space back to user space.
134 */
135static int copyout(void __user *info, struct openpromio *opp, int len)
136{
137 if (copy_to_user(info, opp, len))
138 return -EFAULT;
139 return 0;
140}
141
142/*
143 * SunOS and Solaris /dev/openprom ioctl calls.
144 */
145static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
146 unsigned int cmd, unsigned long arg, int node)
147{
148 DATA *data = (DATA *) file->private_data;
149 char buffer[OPROMMAXPARAM+1], *buf;
150 struct openpromio *opp;
151 int bufsize, len, error = 0;
152 static int cnt;
153 void __user *argp = (void __user *)arg;
154
155 if (cmd == OPROMSETOPT)
156 bufsize = getstrings(argp, &opp);
157 else
158 bufsize = copyin(argp, &opp);
159
160 if (bufsize < 0)
161 return bufsize;
162
163 switch (cmd) {
164 case OPROMGETOPT:
165 case OPROMGETPROP:
166 len = prom_getproplen(node, opp->oprom_array);
167
168 if (len <= 0 || len > bufsize) {
169 error = copyout(argp, opp, sizeof(int));
170 break;
171 }
172
173 len = prom_getproperty(node, opp->oprom_array, buffer, bufsize);
174
175 memcpy(opp->oprom_array, buffer, len);
176 opp->oprom_array[len] = '\0';
177 opp->oprom_size = len;
178
179 error = copyout(argp, opp, sizeof(int) + bufsize);
180 break;
181
182 case OPROMNXTOPT:
183 case OPROMNXTPROP:
184 buf = prom_nextprop(node, opp->oprom_array, buffer);
185
186 len = strlen(buf);
187 if (len == 0 || len + 1 > bufsize) {
188 error = copyout(argp, opp, sizeof(int));
189 break;
190 }
191
192 memcpy(opp->oprom_array, buf, len);
193 opp->oprom_array[len] = '\0';
194 opp->oprom_size = ++len;
195
196 error = copyout(argp, opp, sizeof(int) + bufsize);
197 break;
198
199 case OPROMSETOPT:
200 case OPROMSETOPT2:
201 buf = opp->oprom_array + strlen(opp->oprom_array) + 1;
202 len = opp->oprom_array + bufsize - buf;
203
204 error = prom_setprop(options_node, opp->oprom_array,
205 buf, len);
206
207 if (error < 0)
208 error = -EINVAL;
209 break;
210
211 case OPROMNEXT:
212 case OPROMCHILD:
213 case OPROMSETCUR:
214 if (bufsize < sizeof(int)) {
215 error = -EINVAL;
216 break;
217 }
218
219 node = *((int *) opp->oprom_array);
220
221 switch (cmd) {
222 case OPROMNEXT: node = __prom_getsibling(node); break;
223 case OPROMCHILD: node = __prom_getchild(node); break;
224 case OPROMSETCUR: break;
225 }
226
227 data->current_node = node;
228 *((int *)opp->oprom_array) = node;
229 opp->oprom_size = sizeof(int);
230
231 error = copyout(argp, opp, bufsize + sizeof(int));
232 break;
233
234 case OPROMPCI2NODE:
235 error = -EINVAL;
236
237 if (bufsize >= 2*sizeof(int)) {
238#ifdef CONFIG_PCI
239 struct pci_dev *pdev;
240 struct pcidev_cookie *pcp;
241 pdev = pci_find_slot (((int *) opp->oprom_array)[0],
242 ((int *) opp->oprom_array)[1]);
243
244 pcp = pdev->sysdata;
245 if (pcp != NULL && pcp->prom_node != -1 && pcp->prom_node) {
246 node = pcp->prom_node;
247 data->current_node = node;
248 *((int *)opp->oprom_array) = node;
249 opp->oprom_size = sizeof(int);
250 error = copyout(argp, opp, bufsize + sizeof(int));
251 }
252#endif
253 }
254 break;
255
256 case OPROMPATH2NODE:
257 node = prom_finddevice(opp->oprom_array);
258 data->current_node = node;
259 *((int *)opp->oprom_array) = node;
260 opp->oprom_size = sizeof(int);
261
262 error = copyout(argp, opp, bufsize + sizeof(int));
263 break;
264
265 case OPROMGETBOOTARGS:
266 buf = saved_command_line;
267
268 len = strlen(buf);
269
270 if (len > bufsize) {
271 error = -EINVAL;
272 break;
273 }
274
275 strcpy(opp->oprom_array, buf);
276 opp->oprom_size = len;
277
278 error = copyout(argp, opp, bufsize + sizeof(int));
279 break;
280
281 case OPROMU2P:
282 case OPROMGETCONS:
283 case OPROMGETFBNAME:
284 if (cnt++ < 10)
285 printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n");
286 error = -EINVAL;
287 break;
288 default:
289 if (cnt++ < 10)
290 printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
291 error = -EINVAL;
292 break;
293 }
294
295 kfree(opp);
296 return error;
297}
298
299
300/* Return nonzero if a specific node is in the PROM device tree. */
301static int intree(int root, int node)
302{
303 for (; root != 0; root = prom_getsibling(root))
304 if (root == node || intree(prom_getchild(root),node))
305 return 1;
306 return 0;
307}
308
309/* Return nonzero if a specific node is "valid". */
310static int goodnode(int n, DATA *data)
311{
312 if (n == data->lastnode || n == prom_root_node || n == options_node)
313 return 1;
314 if (n == 0 || n == -1 || !intree(prom_root_node,n))
315 return 0;
316 data->lastnode = n;
317 return 1;
318}
319
320/* Copy in a whole string from userspace into kernelspace. */
321static int copyin_string(char __user *user, size_t len, char **ptr)
322{
323 char *tmp;
324
325 if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0)
326 return -EINVAL;
327
328 tmp = kmalloc(len + 1, GFP_KERNEL);
329 if (!tmp)
330 return -ENOMEM;
331
332 if(copy_from_user(tmp, user, len)) {
333 kfree(tmp);
334 return -EFAULT;
335 }
336
337 tmp[len] = '\0';
338
339 *ptr = tmp;
340
341 return 0;
342}
343
344/*
345 * NetBSD /dev/openprom ioctl calls.
346 */
347static int openprom_bsd_ioctl(struct inode * inode, struct file * file,
348 unsigned int cmd, unsigned long arg)
349{
350 DATA *data = (DATA *) file->private_data;
351 void __user *argp = (void __user *)arg;
352 struct opiocdesc op;
353 int error, node, len;
354 char *str, *tmp;
355 char buffer[64];
356 static int cnt;
357
358 switch (cmd) {
359 case OPIOCGET:
360 if (copy_from_user(&op, argp, sizeof(op)))
361 return -EFAULT;
362
363 if (!goodnode(op.op_nodeid,data))
364 return -EINVAL;
365
366 error = copyin_string(op.op_name, op.op_namelen, &str);
367 if (error)
368 return error;
369
370 len = prom_getproplen(op.op_nodeid,str);
371
372 if (len > op.op_buflen) {
373 kfree(str);
374 return -ENOMEM;
375 }
376
377 op.op_buflen = len;
378
379 if (len <= 0) {
380 kfree(str);
381 /* Verified by the above copy_from_user */
382 if (__copy_to_user(argp, &op,
383 sizeof(op)))
384 return -EFAULT;
385 return 0;
386 }
387
388 tmp = kmalloc(len + 1, GFP_KERNEL);
389 if (!tmp) {
390 kfree(str);
391 return -ENOMEM;
392 }
393
394 prom_getproperty(op.op_nodeid, str, tmp, len);
395
396 tmp[len] = '\0';
397
398 if (__copy_to_user(argp, &op, sizeof(op)) != 0
399 || copy_to_user(op.op_buf, tmp, len) != 0)
400 error = -EFAULT;
401
402 kfree(tmp);
403 kfree(str);
404
405 return error;
406
407 case OPIOCNEXTPROP:
408 if (copy_from_user(&op, argp, sizeof(op)))
409 return -EFAULT;
410
411 if (!goodnode(op.op_nodeid,data))
412 return -EINVAL;
413
414 error = copyin_string(op.op_name, op.op_namelen, &str);
415 if (error)
416 return error;
417
418 tmp = prom_nextprop(op.op_nodeid,str,buffer);
419
420 if (tmp) {
421 len = strlen(tmp);
422 if (len > op.op_buflen)
423 len = op.op_buflen;
424 else
425 op.op_buflen = len;
426 } else {
427 len = op.op_buflen = 0;
428 }
429
430 if (!access_ok(VERIFY_WRITE, argp, sizeof(op))) {
431 kfree(str);
432 return -EFAULT;
433 }
434
435 if (!access_ok(VERIFY_WRITE, op.op_buf, len)) {
436 kfree(str);
437 return -EFAULT;
438 }
439
440 error = __copy_to_user(argp, &op, sizeof(op));
441 if (!error) error = __copy_to_user(op.op_buf, tmp, len);
442
443 kfree(str);
444
445 return error;
446
447 case OPIOCSET:
448 if (copy_from_user(&op, argp, sizeof(op)))
449 return -EFAULT;
450
451 if (!goodnode(op.op_nodeid,data))
452 return -EINVAL;
453
454 error = copyin_string(op.op_name, op.op_namelen, &str);
455 if (error)
456 return error;
457
458 error = copyin_string(op.op_buf, op.op_buflen, &tmp);
459 if (error) {
460 kfree(str);
461 return error;
462 }
463
464 len = prom_setprop(op.op_nodeid,str,tmp,op.op_buflen+1);
465
466 if (len != op.op_buflen)
467 return -EINVAL;
468
469 kfree(str);
470 kfree(tmp);
471
472 return 0;
473
474 case OPIOCGETOPTNODE:
475 if (copy_to_user(argp, &options_node, sizeof(int)))
476 return -EFAULT;
477 return 0;
478
479 case OPIOCGETNEXT:
480 case OPIOCGETCHILD:
481 if (copy_from_user(&node, argp, sizeof(int)))
482 return -EFAULT;
483
484 if (cmd == OPIOCGETNEXT)
485 node = __prom_getsibling(node);
486 else
487 node = __prom_getchild(node);
488
489 if (__copy_to_user(argp, &node, sizeof(int)))
490 return -EFAULT;
491
492 return 0;
493
494 default:
495 if (cnt++ < 10)
496 printk(KERN_INFO "openprom_bsd_ioctl: cmd 0x%X\n", cmd);
497 return -EINVAL;
498
499 }
500}
501
502
503/*
504 * Handoff control to the correct ioctl handler.
505 */
506static int openprom_ioctl(struct inode * inode, struct file * file,
507 unsigned int cmd, unsigned long arg)
508{
509 DATA *data = (DATA *) file->private_data;
510 static int cnt;
511
512 switch (cmd) {
513 case OPROMGETOPT:
514 case OPROMNXTOPT:
515 if ((file->f_mode & FMODE_READ) == 0)
516 return -EPERM;
517 return openprom_sunos_ioctl(inode, file, cmd, arg,
518 options_node);
519
520 case OPROMSETOPT:
521 case OPROMSETOPT2:
522 if ((file->f_mode & FMODE_WRITE) == 0)
523 return -EPERM;
524 return openprom_sunos_ioctl(inode, file, cmd, arg,
525 options_node);
526
527 case OPROMNEXT:
528 case OPROMCHILD:
529 case OPROMGETPROP:
530 case OPROMNXTPROP:
531 if ((file->f_mode & FMODE_READ) == 0)
532 return -EPERM;
533 return openprom_sunos_ioctl(inode, file, cmd, arg,
534 data->current_node);
535
536 case OPROMU2P:
537 case OPROMGETCONS:
538 case OPROMGETFBNAME:
539 case OPROMGETBOOTARGS:
540 case OPROMSETCUR:
541 case OPROMPCI2NODE:
542 case OPROMPATH2NODE:
543 if ((file->f_mode & FMODE_READ) == 0)
544 return -EPERM;
545 return openprom_sunos_ioctl(inode, file, cmd, arg, 0);
546
547 case OPIOCGET:
548 case OPIOCNEXTPROP:
549 case OPIOCGETOPTNODE:
550 case OPIOCGETNEXT:
551 case OPIOCGETCHILD:
552 if ((file->f_mode & FMODE_READ) == 0)
553 return -EBADF;
554 return openprom_bsd_ioctl(inode,file,cmd,arg);
555
556 case OPIOCSET:
557 if ((file->f_mode & FMODE_WRITE) == 0)
558 return -EBADF;
559 return openprom_bsd_ioctl(inode,file,cmd,arg);
560
561 default:
562 if (cnt++ < 10)
563 printk("openprom_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
564 return -EINVAL;
565 }
566}
567
568static int openprom_open(struct inode * inode, struct file * file)
569{
570 DATA *data;
571
572 data = (DATA *) kmalloc(sizeof(DATA), GFP_KERNEL);
573 if (!data)
574 return -ENOMEM;
575
576 data->current_node = prom_root_node;
577 data->lastnode = prom_root_node;
578 file->private_data = (void *)data;
579
580 return 0;
581}
582
583static int openprom_release(struct inode * inode, struct file * file)
584{
585 kfree(file->private_data);
586 return 0;
587}
588
589static struct file_operations openprom_fops = {
590 .owner = THIS_MODULE,
591 .llseek = no_llseek,
592 .ioctl = openprom_ioctl,
593 .open = openprom_open,
594 .release = openprom_release,
595};
596
597static struct miscdevice openprom_dev = {
598 SUN_OPENPROM_MINOR, "openprom", &openprom_fops
599};
600
601static int __init openprom_init(void)
602{
603 int error;
604
605 error = misc_register(&openprom_dev);
606 if (error) {
607 printk(KERN_ERR "openprom: unable to get misc minor\n");
608 return error;
609 }
610
611 options_node = prom_getchild(prom_root_node);
612 options_node = prom_searchsiblings(options_node,"options");
613
614 if (options_node == 0 || options_node == -1) {
615 printk(KERN_ERR "openprom: unable to find options node\n");
616 misc_deregister(&openprom_dev);
617 return -EIO;
618 }
619
620 return 0;
621}
622
623static void __exit openprom_cleanup(void)
624{
625 misc_deregister(&openprom_dev);
626}
627
628module_init(openprom_init);
629module_exit(openprom_cleanup);
630MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/riowatchdog.c b/drivers/sbus/char/riowatchdog.c
new file mode 100644
index 00000000000..d1babff6a53
--- /dev/null
+++ b/drivers/sbus/char/riowatchdog.c
@@ -0,0 +1,293 @@
1/* $Id: riowatchdog.c,v 1.3.2.2 2002/01/23 18:48:02 davem Exp $
2 * riowatchdog.c - driver for hw watchdog inside Super I/O of RIO
3 *
4 * Copyright (C) 2001 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/types.h>
10#include <linux/fs.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/miscdevice.h>
14
15#include <asm/io.h>
16#include <asm/ebus.h>
17#include <asm/bbc.h>
18#include <asm/oplib.h>
19#include <asm/uaccess.h>
20
21#include <asm/watchdog.h>
22
23/* RIO uses the NatSemi Super I/O power management logical device
24 * as its' watchdog.
25 *
26 * When the watchdog triggers, it asserts a line to the BBC (Boot Bus
27 * Controller) of the machine. The BBC can only be configured to
28 * trigger a power-on reset when the signal is asserted. The BBC
29 * can be configured to ignore the signal entirely as well.
30 *
31 * The only Super I/O device register we care about is at index
32 * 0x05 (WDTO_INDEX) which is the watchdog time-out in minutes (1-255).
33 * If set to zero, this disables the watchdog. When set, the system
34 * must periodically (before watchdog expires) clear (set to zero) and
35 * re-set the watchdog else it will trigger.
36 *
37 * There are two other indexed watchdog registers inside this Super I/O
38 * logical device, but they are unused. The first, at index 0x06 is
39 * the watchdog control and can be used to make the watchdog timer re-set
40 * when the PS/2 mouse or serial lines show activity. The second, at
41 * index 0x07 is merely a sampling of the line from the watchdog to the
42 * BBC.
43 *
44 * The watchdog device generates no interrupts.
45 */
46
47MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
48MODULE_DESCRIPTION("Hardware watchdog driver for Sun RIO");
49MODULE_SUPPORTED_DEVICE("watchdog");
50MODULE_LICENSE("GPL");
51
52#define RIOWD_NAME "pmc"
53#define RIOWD_MINOR 215
54
55static DEFINE_SPINLOCK(riowd_lock);
56
57static void __iomem *bbc_regs;
58static void __iomem *riowd_regs;
59#define WDTO_INDEX 0x05
60
61static int riowd_timeout = 1; /* in minutes */
62module_param(riowd_timeout, int, 0);
63MODULE_PARM_DESC(riowd_timeout, "Watchdog timeout in minutes");
64
65#if 0 /* Currently unused. */
66static u8 riowd_readreg(int index)
67{
68 unsigned long flags;
69 u8 ret;
70
71 spin_lock_irqsave(&riowd_lock, flags);
72 writeb(index, riowd_regs + 0);
73 ret = readb(riowd_regs + 1);
74 spin_unlock_irqrestore(&riowd_lock, flags);
75
76 return ret;
77}
78#endif
79
80static void riowd_writereg(u8 val, int index)
81{
82 unsigned long flags;
83
84 spin_lock_irqsave(&riowd_lock, flags);
85 writeb(index, riowd_regs + 0);
86 writeb(val, riowd_regs + 1);
87 spin_unlock_irqrestore(&riowd_lock, flags);
88}
89
90static void riowd_pingtimer(void)
91{
92 riowd_writereg(riowd_timeout, WDTO_INDEX);
93}
94
95static void riowd_stoptimer(void)
96{
97 u8 val;
98
99 riowd_writereg(0, WDTO_INDEX);
100
101 val = readb(bbc_regs + BBC_WDACTION);
102 val &= ~BBC_WDACTION_RST;
103 writeb(val, bbc_regs + BBC_WDACTION);
104}
105
106static void riowd_starttimer(void)
107{
108 u8 val;
109
110 riowd_writereg(riowd_timeout, WDTO_INDEX);
111
112 val = readb(bbc_regs + BBC_WDACTION);
113 val |= BBC_WDACTION_RST;
114 writeb(val, bbc_regs + BBC_WDACTION);
115}
116
117static int riowd_open(struct inode *inode, struct file *filp)
118{
119 nonseekable_open(inode, filp);
120 return 0;
121}
122
123static int riowd_release(struct inode *inode, struct file *filp)
124{
125 return 0;
126}
127
128static int riowd_ioctl(struct inode *inode, struct file *filp,
129 unsigned int cmd, unsigned long arg)
130{
131 static struct watchdog_info info = {
132 WDIOF_SETTIMEOUT, 0, "Natl. Semiconductor PC97317"
133 };
134 void __user *argp = (void __user *)arg;
135 unsigned int options;
136 int new_margin;
137
138 switch (cmd) {
139 case WDIOC_GETSUPPORT:
140 if (copy_to_user(argp, &info, sizeof(info)))
141 return -EFAULT;
142 break;
143
144 case WDIOC_GETSTATUS:
145 case WDIOC_GETBOOTSTATUS:
146 if (put_user(0, (int __user *)argp))
147 return -EFAULT;
148 break;
149
150 case WDIOC_KEEPALIVE:
151 riowd_pingtimer();
152 break;
153
154 case WDIOC_SETOPTIONS:
155 if (copy_from_user(&options, argp, sizeof(options)))
156 return -EFAULT;
157
158 if (options & WDIOS_DISABLECARD)
159 riowd_stoptimer();
160 else if (options & WDIOS_ENABLECARD)
161 riowd_starttimer();
162 else
163 return -EINVAL;
164
165 break;
166
167 case WDIOC_SETTIMEOUT:
168 if (get_user(new_margin, (int __user *)argp))
169 return -EFAULT;
170 if ((new_margin < 60) || (new_margin > (255 * 60)))
171 return -EINVAL;
172 riowd_timeout = (new_margin + 59) / 60;
173 riowd_pingtimer();
174 /* Fall */
175
176 case WDIOC_GETTIMEOUT:
177 return put_user(riowd_timeout * 60, (int __user *)argp);
178
179 default:
180 return -EINVAL;
181 };
182
183 return 0;
184}
185
186static ssize_t riowd_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
187{
188 if (count) {
189 riowd_pingtimer();
190 return 1;
191 }
192
193 return 0;
194}
195
196static struct file_operations riowd_fops = {
197 .owner = THIS_MODULE,
198 .ioctl = riowd_ioctl,
199 .open = riowd_open,
200 .write = riowd_write,
201 .release = riowd_release,
202};
203
204static struct miscdevice riowd_miscdev = { RIOWD_MINOR, RIOWD_NAME, &riowd_fops };
205
206static int __init riowd_bbc_init(void)
207{
208 struct linux_ebus *ebus = NULL;
209 struct linux_ebus_device *edev = NULL;
210 u8 val;
211
212 for_each_ebus(ebus) {
213 for_each_ebusdev(edev, ebus) {
214 if (!strcmp(edev->prom_name, "bbc"))
215 goto found_bbc;
216 }
217 }
218
219found_bbc:
220 if (!edev)
221 return -ENODEV;
222 bbc_regs = ioremap(edev->resource[0].start, BBC_REGS_SIZE);
223 if (!bbc_regs)
224 return -ENODEV;
225
226 /* Turn it off. */
227 val = readb(bbc_regs + BBC_WDACTION);
228 val &= ~BBC_WDACTION_RST;
229 writeb(val, bbc_regs + BBC_WDACTION);
230
231 return 0;
232}
233
234static int __init riowd_init(void)
235{
236 struct linux_ebus *ebus = NULL;
237 struct linux_ebus_device *edev = NULL;
238
239 for_each_ebus(ebus) {
240 for_each_ebusdev(edev, ebus) {
241 if (!strcmp(edev->prom_name, RIOWD_NAME))
242 goto ebus_done;
243 }
244 }
245
246ebus_done:
247 if (!edev)
248 goto fail;
249
250 riowd_regs = ioremap(edev->resource[0].start, 2);
251 if (riowd_regs == NULL) {
252 printk(KERN_ERR "pmc: Cannot map registers.\n");
253 return -ENODEV;
254 }
255
256 if (riowd_bbc_init()) {
257 printk(KERN_ERR "pmc: Failure initializing BBC config.\n");
258 goto fail;
259 }
260
261 if (misc_register(&riowd_miscdev)) {
262 printk(KERN_ERR "pmc: Cannot register watchdog misc device.\n");
263 goto fail;
264 }
265
266 printk(KERN_INFO "pmc: Hardware watchdog [%i minutes], "
267 "regs at %p\n", riowd_timeout, riowd_regs);
268
269 return 0;
270
271fail:
272 if (riowd_regs) {
273 iounmap(riowd_regs);
274 riowd_regs = NULL;
275 }
276 if (bbc_regs) {
277 iounmap(bbc_regs);
278 bbc_regs = NULL;
279 }
280 return -ENODEV;
281}
282
283static void __exit riowd_cleanup(void)
284{
285 misc_deregister(&riowd_miscdev);
286 iounmap(riowd_regs);
287 riowd_regs = NULL;
288 iounmap(bbc_regs);
289 bbc_regs = NULL;
290}
291
292module_init(riowd_init);
293module_exit(riowd_cleanup);
diff --git a/drivers/sbus/char/rtc.c b/drivers/sbus/char/rtc.c
new file mode 100644
index 00000000000..bf3273eb1c8
--- /dev/null
+++ b/drivers/sbus/char/rtc.c
@@ -0,0 +1,178 @@
1/* $Id: rtc.c,v 1.28 2001/10/08 22:19:51 davem Exp $
2 *
3 * Linux/SPARC Real Time Clock Driver
4 * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
5 *
6 * This is a little driver that lets a user-level program access
7 * the SPARC Mostek real time clock chip. It is no use unless you
8 * use the modified clock utility.
9 *
10 * Get the modified clock utility from:
11 * ftp://vger.kernel.org/pub/linux/Sparc/userland/clock.c
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/errno.h>
17#include <linux/miscdevice.h>
18#include <linux/slab.h>
19#include <linux/fcntl.h>
20#include <linux/poll.h>
21#include <linux/init.h>
22#include <linux/smp_lock.h>
23#include <asm/io.h>
24#include <asm/mostek.h>
25#include <asm/system.h>
26#include <asm/uaccess.h>
27#include <asm/rtc.h>
28
29static int rtc_busy = 0;
30
31/* Retrieve the current date and time from the real time clock. */
32static void get_rtc_time(struct rtc_time *t)
33{
34 void * __iomem regs = mstk48t02_regs;
35 u8 tmp;
36
37 spin_lock_irq(&mostek_lock);
38
39 tmp = mostek_read(regs + MOSTEK_CREG);
40 tmp |= MSTK_CREG_READ;
41 mostek_write(regs + MOSTEK_CREG, tmp);
42
43 t->sec = MSTK_REG_SEC(regs);
44 t->min = MSTK_REG_MIN(regs);
45 t->hour = MSTK_REG_HOUR(regs);
46 t->dow = MSTK_REG_DOW(regs);
47 t->dom = MSTK_REG_DOM(regs);
48 t->month = MSTK_REG_MONTH(regs);
49 t->year = MSTK_CVT_YEAR( MSTK_REG_YEAR(regs) );
50
51 tmp = mostek_read(regs + MOSTEK_CREG);
52 tmp &= ~MSTK_CREG_READ;
53 mostek_write(regs + MOSTEK_CREG, tmp);
54
55 spin_unlock_irq(&mostek_lock);
56}
57
58/* Set the current date and time inthe real time clock. */
59void set_rtc_time(struct rtc_time *t)
60{
61 void * __iomem regs = mstk48t02_regs;
62 u8 tmp;
63
64 spin_lock_irq(&mostek_lock);
65
66 tmp = mostek_read(regs + MOSTEK_CREG);
67 tmp |= MSTK_CREG_WRITE;
68 mostek_write(regs + MOSTEK_CREG, tmp);
69
70 MSTK_SET_REG_SEC(regs,t->sec);
71 MSTK_SET_REG_MIN(regs,t->min);
72 MSTK_SET_REG_HOUR(regs,t->hour);
73 MSTK_SET_REG_DOW(regs,t->dow);
74 MSTK_SET_REG_DOM(regs,t->dom);
75 MSTK_SET_REG_MONTH(regs,t->month);
76 MSTK_SET_REG_YEAR(regs,t->year - MSTK_YEAR_ZERO);
77
78 tmp = mostek_read(regs + MOSTEK_CREG);
79 tmp &= ~MSTK_CREG_WRITE;
80 mostek_write(regs + MOSTEK_CREG, tmp);
81
82 spin_unlock_irq(&mostek_lock);
83}
84
85static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
86 unsigned long arg)
87{
88 struct rtc_time rtc_tm;
89 void __user *argp = (void __user *)arg;
90
91 switch (cmd)
92 {
93 case RTCGET:
94 memset(&rtc_tm, 0, sizeof(struct rtc_time));
95 get_rtc_time(&rtc_tm);
96
97 if (copy_to_user(argp, &rtc_tm, sizeof(struct rtc_time)))
98 return -EFAULT;
99
100 return 0;
101
102
103 case RTCSET:
104 if (!capable(CAP_SYS_TIME))
105 return -EPERM;
106
107 if (copy_from_user(&rtc_tm, argp, sizeof(struct rtc_time)))
108 return -EFAULT;
109
110 set_rtc_time(&rtc_tm);
111
112 return 0;
113
114 default:
115 return -EINVAL;
116 }
117}
118
119static int rtc_open(struct inode *inode, struct file *file)
120{
121 int ret;
122
123 spin_lock_irq(&mostek_lock);
124 if (rtc_busy) {
125 ret = -EBUSY;
126 } else {
127 rtc_busy = 1;
128 ret = 0;
129 }
130 spin_unlock_irq(&mostek_lock);
131
132 return ret;
133}
134
135static int rtc_release(struct inode *inode, struct file *file)
136{
137 rtc_busy = 0;
138
139 return 0;
140}
141
142static struct file_operations rtc_fops = {
143 .owner = THIS_MODULE,
144 .llseek = no_llseek,
145 .ioctl = rtc_ioctl,
146 .open = rtc_open,
147 .release = rtc_release,
148};
149
150static struct miscdevice rtc_dev = { RTC_MINOR, "rtc", &rtc_fops };
151
152static int __init rtc_sun_init(void)
153{
154 int error;
155
156 /* It is possible we are being driven by some other RTC chip
157 * and thus another RTC driver is handling things.
158 */
159 if (mstk48t02_regs == 0)
160 return -ENODEV;
161
162 error = misc_register(&rtc_dev);
163 if (error) {
164 printk(KERN_ERR "rtc: unable to get misc minor for Mostek\n");
165 return error;
166 }
167
168 return 0;
169}
170
171static void __exit rtc_sun_cleanup(void)
172{
173 misc_deregister(&rtc_dev);
174}
175
176module_init(rtc_sun_init);
177module_exit(rtc_sun_cleanup);
178MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c
new file mode 100644
index 00000000000..858cc683f85
--- /dev/null
+++ b/drivers/sbus/char/uctrl.c
@@ -0,0 +1,422 @@
1/* $Id: uctrl.c,v 1.12 2001/10/08 22:19:51 davem Exp $
2 * uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
3 *
4 * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
5 */
6
7#include <linux/module.h>
8#include <linux/sched.h>
9#include <linux/errno.h>
10#include <linux/delay.h>
11#include <linux/interrupt.h>
12#include <linux/slab.h>
13#include <linux/ioport.h>
14#include <linux/init.h>
15#include <linux/miscdevice.h>
16#include <linux/mm.h>
17
18#include <asm/openprom.h>
19#include <asm/oplib.h>
20#include <asm/system.h>
21#include <asm/irq.h>
22#include <asm/io.h>
23#include <asm/pgtable.h>
24#include <asm/sbus.h>
25
26#define UCTRL_MINOR 174
27
28#define DEBUG 1
29#ifdef DEBUG
30#define dprintk(x) printk x
31#else
32#define dprintk(x)
33#endif
34
35struct uctrl_regs {
36 volatile u32 uctrl_intr;
37 volatile u32 uctrl_data;
38 volatile u32 uctrl_stat;
39 volatile u32 uctrl_xxx[5];
40};
41
42struct ts102_regs {
43 volatile u32 card_a_intr;
44 volatile u32 card_a_stat;
45 volatile u32 card_a_ctrl;
46 volatile u32 card_a_xxx;
47 volatile u32 card_b_intr;
48 volatile u32 card_b_stat;
49 volatile u32 card_b_ctrl;
50 volatile u32 card_b_xxx;
51 volatile u32 uctrl_intr;
52 volatile u32 uctrl_data;
53 volatile u32 uctrl_stat;
54 volatile u32 uctrl_xxx;
55 volatile u32 ts102_xxx[4];
56};
57
58/* Bits for uctrl_intr register */
59#define UCTRL_INTR_TXE_REQ 0x01 /* transmit FIFO empty int req */
60#define UCTRL_INTR_TXNF_REQ 0x02 /* transmit FIFO not full int req */
61#define UCTRL_INTR_RXNE_REQ 0x04 /* receive FIFO not empty int req */
62#define UCTRL_INTR_RXO_REQ 0x08 /* receive FIFO overflow int req */
63#define UCTRL_INTR_TXE_MSK 0x10 /* transmit FIFO empty mask */
64#define UCTRL_INTR_TXNF_MSK 0x20 /* transmit FIFO not full mask */
65#define UCTRL_INTR_RXNE_MSK 0x40 /* receive FIFO not empty mask */
66#define UCTRL_INTR_RXO_MSK 0x80 /* receive FIFO overflow mask */
67
68/* Bits for uctrl_stat register */
69#define UCTRL_STAT_TXE_STA 0x01 /* transmit FIFO empty status */
70#define UCTRL_STAT_TXNF_STA 0x02 /* transmit FIFO not full status */
71#define UCTRL_STAT_RXNE_STA 0x04 /* receive FIFO not empty status */
72#define UCTRL_STAT_RXO_STA 0x08 /* receive FIFO overflow status */
73
74static const char *uctrl_extstatus[16] = {
75 "main power available",
76 "internal battery attached",
77 "external battery attached",
78 "external VGA attached",
79 "external keyboard attached",
80 "external mouse attached",
81 "lid down",
82 "internal battery currently charging",
83 "external battery currently charging",
84 "internal battery currently discharging",
85 "external battery currently discharging",
86};
87
88/* Everything required for one transaction with the uctrl */
89struct uctrl_txn {
90 u8 opcode;
91 u8 inbits;
92 u8 outbits;
93 u8 *inbuf;
94 u8 *outbuf;
95};
96
97struct uctrl_status {
98 u8 current_temp; /* 0x07 */
99 u8 reset_status; /* 0x0b */
100 u16 event_status; /* 0x0c */
101 u16 error_status; /* 0x10 */
102 u16 external_status; /* 0x11, 0x1b */
103 u8 internal_charge; /* 0x18 */
104 u8 external_charge; /* 0x19 */
105 u16 control_lcd; /* 0x20 */
106 u8 control_bitport; /* 0x21 */
107 u8 speaker_volume; /* 0x23 */
108 u8 control_tft_brightness; /* 0x24 */
109 u8 control_kbd_repeat_delay; /* 0x28 */
110 u8 control_kbd_repeat_period; /* 0x29 */
111 u8 control_screen_contrast; /* 0x2F */
112};
113
114enum uctrl_opcode {
115 READ_SERIAL_NUMBER=0x1,
116 READ_ETHERNET_ADDRESS=0x2,
117 READ_HARDWARE_VERSION=0x3,
118 READ_MICROCONTROLLER_VERSION=0x4,
119 READ_MAX_TEMPERATURE=0x5,
120 READ_MIN_TEMPERATURE=0x6,
121 READ_CURRENT_TEMPERATURE=0x7,
122 READ_SYSTEM_VARIANT=0x8,
123 READ_POWERON_CYCLES=0x9,
124 READ_POWERON_SECONDS=0xA,
125 READ_RESET_STATUS=0xB,
126 READ_EVENT_STATUS=0xC,
127 READ_REAL_TIME_CLOCK=0xD,
128 READ_EXTERNAL_VGA_PORT=0xE,
129 READ_MICROCONTROLLER_ROM_CHECKSUM=0xF,
130 READ_ERROR_STATUS=0x10,
131 READ_EXTERNAL_STATUS=0x11,
132 READ_USER_CONFIGURATION_AREA=0x12,
133 READ_MICROCONTROLLER_VOLTAGE=0x13,
134 READ_INTERNAL_BATTERY_VOLTAGE=0x14,
135 READ_DCIN_VOLTAGE=0x15,
136 READ_HORIZONTAL_POINTER_VOLTAGE=0x16,
137 READ_VERTICAL_POINTER_VOLTAGE=0x17,
138 READ_INTERNAL_BATTERY_CHARGE_LEVEL=0x18,
139 READ_EXTERNAL_BATTERY_CHARGE_LEVEL=0x19,
140 READ_REAL_TIME_CLOCK_ALARM=0x1A,
141 READ_EVENT_STATUS_NO_RESET=0x1B,
142 READ_INTERNAL_KEYBOARD_LAYOUT=0x1C,
143 READ_EXTERNAL_KEYBOARD_LAYOUT=0x1D,
144 READ_EEPROM_STATUS=0x1E,
145 CONTROL_LCD=0x20,
146 CONTROL_BITPORT=0x21,
147 SPEAKER_VOLUME=0x23,
148 CONTROL_TFT_BRIGHTNESS=0x24,
149 CONTROL_WATCHDOG=0x25,
150 CONTROL_FACTORY_EEPROM_AREA=0x26,
151 CONTROL_KBD_TIME_UNTIL_REPEAT=0x28,
152 CONTROL_KBD_TIME_BETWEEN_REPEATS=0x29,
153 CONTROL_TIMEZONE=0x2A,
154 CONTROL_MARK_SPACE_RATIO=0x2B,
155 CONTROL_DIAGNOSTIC_MODE=0x2E,
156 CONTROL_SCREEN_CONTRAST=0x2F,
157 RING_BELL=0x30,
158 SET_DIAGNOSTIC_STATUS=0x32,
159 CLEAR_KEY_COMBINATION_TABLE=0x33,
160 PERFORM_SOFTWARE_RESET=0x34,
161 SET_REAL_TIME_CLOCK=0x35,
162 RECALIBRATE_POINTING_STICK=0x36,
163 SET_BELL_FREQUENCY=0x37,
164 SET_INTERNAL_BATTERY_CHARGE_RATE=0x39,
165 SET_EXTERNAL_BATTERY_CHARGE_RATE=0x3A,
166 SET_REAL_TIME_CLOCK_ALARM=0x3B,
167 READ_EEPROM=0x40,
168 WRITE_EEPROM=0x41,
169 WRITE_TO_STATUS_DISPLAY=0x42,
170 DEFINE_SPECIAL_CHARACTER=0x43,
171 DEFINE_KEY_COMBINATION_ENTRY=0x50,
172 DEFINE_STRING_TABLE_ENTRY=0x51,
173 DEFINE_STATUS_SCREEN_DISPLAY=0x52,
174 PERFORM_EMU_COMMANDS=0x64,
175 READ_EMU_REGISTER=0x65,
176 WRITE_EMU_REGISTER=0x66,
177 READ_EMU_RAM=0x67,
178 WRITE_EMU_RAM=0x68,
179 READ_BQ_REGISTER=0x69,
180 WRITE_BQ_REGISTER=0x6A,
181 SET_USER_PASSWORD=0x70,
182 VERIFY_USER_PASSWORD=0x71,
183 GET_SYSTEM_PASSWORD_KEY=0x72,
184 VERIFY_SYSTEM_PASSWORD=0x73,
185 POWER_OFF=0x82,
186 POWER_RESTART=0x83,
187};
188
189struct uctrl_driver {
190 struct uctrl_regs *regs;
191 int irq;
192 int pending;
193 struct uctrl_status status;
194};
195
196static struct uctrl_driver drv;
197
198void uctrl_get_event_status(void);
199void uctrl_get_external_status(void);
200
201static int
202uctrl_ioctl(struct inode *inode, struct file *file,
203 unsigned int cmd, unsigned long arg)
204{
205 switch (cmd) {
206 default:
207 return -EINVAL;
208 }
209 return 0;
210}
211
212static int
213uctrl_open(struct inode *inode, struct file *file)
214{
215 uctrl_get_event_status();
216 uctrl_get_external_status();
217 return 0;
218}
219
220static irqreturn_t uctrl_interrupt(int irq, void *dev_id, struct pt_regs *regs)
221{
222 struct uctrl_driver *driver = (struct uctrl_driver *)dev_id;
223 printk("in uctrl_interrupt\n");
224 return IRQ_HANDLED;
225}
226
227static struct file_operations uctrl_fops = {
228 .owner = THIS_MODULE,
229 .llseek = no_llseek,
230 .ioctl = uctrl_ioctl,
231 .open = uctrl_open,
232};
233
234static struct miscdevice uctrl_dev = {
235 UCTRL_MINOR,
236 "uctrl",
237 &uctrl_fops
238};
239
240/* Wait for space to write, then write to it */
241#define WRITEUCTLDATA(value) \
242{ \
243 unsigned int i; \
244 for (i = 0; i < 10000; i++) { \
245 if (UCTRL_STAT_TXNF_STA & driver->regs->uctrl_stat) \
246 break; \
247 } \
248 dprintk(("write data 0x%02x\n", value)); \
249 driver->regs->uctrl_data = value; \
250}
251
252/* Wait for something to read, read it, then clear the bit */
253#define READUCTLDATA(value) \
254{ \
255 unsigned int i; \
256 value = 0; \
257 for (i = 0; i < 10000; i++) { \
258 if ((UCTRL_STAT_RXNE_STA & driver->regs->uctrl_stat) == 0) \
259 break; \
260 udelay(1); \
261 } \
262 value = driver->regs->uctrl_data; \
263 dprintk(("read data 0x%02x\n", value)); \
264 driver->regs->uctrl_stat = UCTRL_STAT_RXNE_STA; \
265}
266
267void uctrl_set_video(int status)
268{
269 struct uctrl_driver *driver = &drv;
270
271}
272
273static void uctrl_do_txn(struct uctrl_txn *txn)
274{
275 struct uctrl_driver *driver = &drv;
276 int stat, incnt, outcnt, bytecnt, intr;
277 u32 byte;
278
279 stat = driver->regs->uctrl_stat;
280 intr = driver->regs->uctrl_intr;
281 driver->regs->uctrl_stat = stat;
282
283 dprintk(("interrupt stat 0x%x int 0x%x\n", stat, intr));
284
285 incnt = txn->inbits;
286 outcnt = txn->outbits;
287 byte = (txn->opcode << 8);
288 WRITEUCTLDATA(byte);
289
290 bytecnt = 0;
291 while (incnt > 0) {
292 byte = (txn->inbuf[bytecnt] << 8);
293 WRITEUCTLDATA(byte);
294 incnt--;
295 bytecnt++;
296 }
297
298 /* Get the ack */
299 READUCTLDATA(byte);
300 dprintk(("ack was %x\n", (byte >> 8)));
301
302 bytecnt = 0;
303 while (outcnt > 0) {
304 READUCTLDATA(byte);
305 txn->outbuf[bytecnt] = (byte >> 8);
306 dprintk(("set byte to %02x\n", byte));
307 outcnt--;
308 bytecnt++;
309 }
310}
311
312void uctrl_get_event_status()
313{
314 struct uctrl_driver *driver = &drv;
315 struct uctrl_txn txn;
316 u8 outbits[2];
317
318 txn.opcode = READ_EVENT_STATUS;
319 txn.inbits = 0;
320 txn.outbits = 2;
321 txn.inbuf = 0;
322 txn.outbuf = outbits;
323
324 uctrl_do_txn(&txn);
325
326 dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
327 driver->status.event_status =
328 ((outbits[0] & 0xff) << 8) | (outbits[1] & 0xff);
329 dprintk(("ev is %x\n", driver->status.event_status));
330}
331
332void uctrl_get_external_status()
333{
334 struct uctrl_driver *driver = &drv;
335 struct uctrl_txn txn;
336 u8 outbits[2];
337 int i, v;
338
339 txn.opcode = READ_EXTERNAL_STATUS;
340 txn.inbits = 0;
341 txn.outbits = 2;
342 txn.inbuf = 0;
343 txn.outbuf = outbits;
344
345 uctrl_do_txn(&txn);
346
347 dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
348 driver->status.external_status =
349 ((outbits[0] * 256) + (outbits[1]));
350 dprintk(("ex is %x\n", driver->status.external_status));
351 v = driver->status.external_status;
352 for (i = 0; v != 0; i++, v >>= 1) {
353 if (v & 1) {
354 dprintk(("%s%s", " ", uctrl_extstatus[i]));
355 }
356 }
357 dprintk(("\n"));
358
359}
360
361static int __init ts102_uctrl_init(void)
362{
363 struct uctrl_driver *driver = &drv;
364 int len, i;
365 struct linux_prom_irqs tmp_irq[2];
366 unsigned int vaddr[2] = { 0, 0 };
367 int tmpnode, uctrlnode = prom_getchild(prom_root_node);
368
369 tmpnode = prom_searchsiblings(uctrlnode, "obio");
370
371 if (tmpnode)
372 uctrlnode = prom_getchild(tmpnode);
373
374 uctrlnode = prom_searchsiblings(uctrlnode, "uctrl");
375
376 if (!uctrlnode)
377 return -ENODEV;
378
379 /* the prom mapped it for us */
380 len = prom_getproperty(uctrlnode, "address", (void *) vaddr,
381 sizeof(vaddr));
382 driver->regs = (struct uctrl_regs *)vaddr[0];
383
384 len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq,
385 sizeof(tmp_irq));
386
387 /* Flush device */
388 READUCTLDATA(len);
389
390 if(!driver->irq)
391 driver->irq = tmp_irq[0].pri;
392
393 request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
394
395 if (misc_register(&uctrl_dev)) {
396 printk("%s: unable to get misc minor %d\n",
397 __FUNCTION__, uctrl_dev.minor);
398 free_irq(driver->irq, driver);
399 return -ENODEV;
400 }
401
402 driver->regs->uctrl_intr = UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK;
403 printk("uctrl: 0x%x (irq %s)\n", driver->regs, __irq_itoa(driver->irq));
404 uctrl_get_event_status();
405 uctrl_get_external_status();
406 return 0;
407}
408
409static void __exit ts102_uctrl_cleanup(void)
410{
411 struct uctrl_driver *driver = &drv;
412
413 misc_deregister(&uctrl_dev);
414 if (driver->irq)
415 free_irq(driver->irq, driver);
416 if (driver->regs)
417 driver->regs = 0;
418}
419
420module_init(ts102_uctrl_init);
421module_exit(ts102_uctrl_cleanup);
422MODULE_LICENSE("GPL");
diff --git a/drivers/sbus/char/vfc.h b/drivers/sbus/char/vfc.h
new file mode 100644
index 00000000000..e56a43af0f6
--- /dev/null
+++ b/drivers/sbus/char/vfc.h
@@ -0,0 +1,179 @@
1#ifndef _LINUX_VFC_H_
2#define _LINUX_VFC_H_
3
4#include <linux/devfs_fs_kernel.h>
5
6/*
7 * The control register for the vfc is at offset 0x4000
8 * The first field ram bank is located at offset 0x5000
9 * The second field ram bank is at offset 0x7000
10 * i2c_reg address the Phillips PCF8584(see notes in vfc_i2c.c)
11 * data and transmit register.
12 * i2c_s1 controls register s1 of the PCF8584
13 * i2c_write seems to be similar to i2c_write but I am not
14 * quite sure why sun uses it
15 *
16 * I am also not sure whether or not you can read the fram bank as a
17 * whole or whether you must read each word individually from offset
18 * 0x5000 as soon as I figure it out I will update this file */
19
20struct vfc_regs {
21 char pad1[0x4000];
22 unsigned int control; /* Offset 0x4000 */
23 char pad2[0xffb]; /* from offset 0x4004 to 0x5000 */
24 unsigned int fram_bank1; /* Offset 0x5000 */
25 char pad3[0xffb]; /* from offset 0x5004 to 0x6000 */
26 unsigned int i2c_reg; /* Offset 0x6000 */
27 unsigned int i2c_magic2; /* Offset 0x6004 */
28 unsigned int i2c_s1; /* Offset 0x6008 */
29 unsigned int i2c_write; /* Offset 0x600c */
30 char pad4[0xff0]; /* from offset 0x6010 to 0x7000 */
31 unsigned int fram_bank2; /* Offset 0x7000 */
32 char pad5[0x1000];
33};
34
35#define VFC_SAA9051_NR (13)
36#define VFC_SAA9051_ADDR (0x8a)
37 /* The saa9051 returns the following for its status
38 * bit 0 - 0
39 * bit 1 - SECAM color detected (1=found,0=not found)
40 * bit 2 - COLOR detected (1=found,0=not found)
41 * bit 3 - 0
42 * bit 4 - Field frequency bit (1=60Hz (NTSC), 0=50Hz (PAL))
43 * bit 5 - 1
44 * bit 6 - horizontal frequency lock (1=transmitter found,
45 * 0=no transmitter)
46 * bit 7 - Power on reset bit (1=reset,0=at least one successful
47 * read of the status byte)
48 */
49
50#define VFC_SAA9051_PONRES (0x80)
51#define VFC_SAA9051_HLOCK (0x40)
52#define VFC_SAA9051_FD (0x10)
53#define VFC_SAA9051_CD (0x04)
54#define VFC_SAA9051_CS (0x02)
55
56
57/* The various saa9051 sub addresses */
58
59#define VFC_SAA9051_IDEL (0)
60#define VFC_SAA9051_HSY_START (1)
61#define VFC_SAA9051_HSY_STOP (2)
62#define VFC_SAA9051_HC_START (3)
63#define VFC_SAA9051_HC_STOP (4)
64#define VFC_SAA9051_HS_START (5)
65#define VFC_SAA9051_HORIZ_PEAK (6)
66#define VFC_SAA9051_HUE (7)
67#define VFC_SAA9051_C1 (8)
68#define VFC_SAA9051_C2 (9)
69#define VFC_SAA9051_C3 (0xa)
70#define VFC_SAA9051_SECAM_DELAY (0xb)
71
72
73/* Bit settings for saa9051 sub address 0x06 */
74
75#define VFC_SAA9051_AP1 (0x01)
76#define VFC_SAA9051_AP2 (0x02)
77#define VFC_SAA9051_COR1 (0x04)
78#define VFC_SAA9051_COR2 (0x08)
79#define VFC_SAA9051_BP1 (0x10)
80#define VFC_SAA9051_BP2 (0x20)
81#define VFC_SAA9051_PF (0x40)
82#define VFC_SAA9051_BY (0x80)
83
84
85/* Bit settings for saa9051 sub address 0x08 */
86
87#define VFC_SAA9051_CCFR0 (0x01)
88#define VFC_SAA9051_CCFR1 (0x02)
89#define VFC_SAA9051_YPN (0x04)
90#define VFC_SAA9051_ALT (0x08)
91#define VFC_SAA9051_CO (0x10)
92#define VFC_SAA9051_VTR (0x20)
93#define VFC_SAA9051_FS (0x40)
94#define VFC_SAA9051_HPLL (0x80)
95
96
97/* Bit settings for saa9051 sub address 9 */
98
99#define VFC_SAA9051_SS0 (0x01)
100#define VFC_SAA9051_SS1 (0x02)
101#define VFC_SAA9051_AFCC (0x04)
102#define VFC_SAA9051_CI (0x08)
103#define VFC_SAA9051_SA9D4 (0x10) /* Don't care bit */
104#define VFC_SAA9051_OEC (0x20)
105#define VFC_SAA9051_OEY (0x40)
106#define VFC_SAA9051_VNL (0x80)
107
108
109/* Bit settings for saa9051 sub address 0x0A */
110
111#define VFC_SAA9051_YDL0 (0x01)
112#define VFC_SAA9051_YDL1 (0x02)
113#define VFC_SAA9051_YDL2 (0x04)
114#define VFC_SAA9051_SS2 (0x08)
115#define VFC_SAA9051_SS3 (0x10)
116#define VFC_SAA9051_YC (0x20)
117#define VFC_SAA9051_CT (0x40)
118#define VFC_SAA9051_SYC (0x80)
119
120
121#define VFC_SAA9051_SA(a,b) ((a)->saa9051_state_array[(b)+1])
122#define vfc_update_saa9051(a) (vfc_i2c_sendbuf((a),VFC_SAA9051_ADDR,\
123 (a)->saa9051_state_array,\
124 VFC_SAA9051_NR))
125
126
127struct vfc_dev {
128 volatile struct vfc_regs *regs;
129 struct vfc_regs *phys_regs;
130 unsigned int control_reg;
131 struct semaphore device_lock_sem;
132 struct timer_list poll_timer;
133 wait_queue_head_t poll_wait;
134 int instance;
135 int busy;
136 unsigned long which_io;
137 unsigned char saa9051_state_array[VFC_SAA9051_NR];
138};
139
140extern struct vfc_dev **vfc_dev_lst;
141
142void captstat_reset(struct vfc_dev *);
143void memptr_reset(struct vfc_dev *);
144
145int vfc_pcf8584_init(struct vfc_dev *);
146void vfc_i2c_delay_no_busy(struct vfc_dev *, unsigned long);
147void vfc_i2c_delay(struct vfc_dev *);
148int vfc_i2c_sendbuf(struct vfc_dev *, unsigned char, char *, int) ;
149int vfc_i2c_recvbuf(struct vfc_dev *, unsigned char, char *, int) ;
150int vfc_i2c_reset_bus(struct vfc_dev *);
151int vfc_init_i2c_bus(struct vfc_dev *);
152void vfc_lock_device(struct vfc_dev *);
153void vfc_unlock_device(struct vfc_dev *);
154
155#define VFC_CONTROL_DIAGMODE 0x10000000
156#define VFC_CONTROL_MEMPTR 0x20000000
157#define VFC_CONTROL_CAPTURE 0x02000000
158#define VFC_CONTROL_CAPTRESET 0x04000000
159
160#define VFC_STATUS_CAPTURE 0x08000000
161
162#ifdef VFC_IOCTL_DEBUG
163#define VFC_IOCTL_DEBUG_PRINTK(a) printk a
164#else
165#define VFC_IOCTL_DEBUG_PRINTK(a)
166#endif
167
168#ifdef VFC_I2C_DEBUG
169#define VFC_I2C_DEBUG_PRINTK(a) printk a
170#else
171#define VFC_I2C_DEBUG_PRINTK(a)
172#endif
173
174#endif /* _LINUX_VFC_H_ */
175
176
177
178
179
diff --git a/drivers/sbus/char/vfc_dev.c b/drivers/sbus/char/vfc_dev.c
new file mode 100644
index 00000000000..86ce5413095
--- /dev/null
+++ b/drivers/sbus/char/vfc_dev.c
@@ -0,0 +1,742 @@
1/*
2 * drivers/sbus/char/vfc_dev.c
3 *
4 * Driver for the Videopix Frame Grabber.
5 *
6 * In order to use the VFC you need to program the video controller
7 * chip. This chip is the Phillips SAA9051. You need to call their
8 * documentation ordering line to get the docs.
9 *
10 * There is very little documentation on the VFC itself. There is
11 * some useful info that can be found in the manuals that come with
12 * the card. I will hopefully write some better docs at a later date.
13 *
14 * Copyright (C) 1996 Manish Vachharajani (mvachhar@noc.rutgers.edu)
15 * */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/slab.h>
21#include <linux/errno.h>
22#include <linux/sched.h>
23#include <linux/fs.h>
24#include <linux/smp_lock.h>
25#include <linux/delay.h>
26#include <linux/spinlock.h>
27#include <linux/mm.h>
28
29#include <asm/openprom.h>
30#include <asm/oplib.h>
31#include <asm/io.h>
32#include <asm/system.h>
33#include <asm/sbus.h>
34#include <asm/page.h>
35#include <asm/pgtable.h>
36#include <asm/uaccess.h>
37
38#define VFC_MAJOR (60)
39
40#if 0
41#define VFC_IOCTL_DEBUG
42#endif
43
44#include "vfc.h"
45#include <asm/vfc_ioctls.h>
46
47static struct file_operations vfc_fops;
48struct vfc_dev **vfc_dev_lst;
49static char vfcstr[]="vfc";
50static unsigned char saa9051_init_array[VFC_SAA9051_NR] = {
51 0x00, 0x64, 0x72, 0x52,
52 0x36, 0x18, 0xff, 0x20,
53 0xfc, 0x77, 0xe3, 0x50,
54 0x3e
55};
56
57void vfc_lock_device(struct vfc_dev *dev)
58{
59 down(&dev->device_lock_sem);
60}
61
62void vfc_unlock_device(struct vfc_dev *dev)
63{
64 up(&dev->device_lock_sem);
65}
66
67
68void vfc_captstat_reset(struct vfc_dev *dev)
69{
70 dev->control_reg |= VFC_CONTROL_CAPTRESET;
71 sbus_writel(dev->control_reg, &dev->regs->control);
72 dev->control_reg &= ~VFC_CONTROL_CAPTRESET;
73 sbus_writel(dev->control_reg, &dev->regs->control);
74 dev->control_reg |= VFC_CONTROL_CAPTRESET;
75 sbus_writel(dev->control_reg, &dev->regs->control);
76}
77
78void vfc_memptr_reset(struct vfc_dev *dev)
79{
80 dev->control_reg |= VFC_CONTROL_MEMPTR;
81 sbus_writel(dev->control_reg, &dev->regs->control);
82 dev->control_reg &= ~VFC_CONTROL_MEMPTR;
83 sbus_writel(dev->control_reg, &dev->regs->control);
84 dev->control_reg |= VFC_CONTROL_MEMPTR;
85 sbus_writel(dev->control_reg, &dev->regs->control);
86}
87
88int vfc_csr_init(struct vfc_dev *dev)
89{
90 dev->control_reg = 0x80000000;
91 sbus_writel(dev->control_reg, &dev->regs->control);
92 udelay(200);
93 dev->control_reg &= ~0x80000000;
94 sbus_writel(dev->control_reg, &dev->regs->control);
95 udelay(100);
96 sbus_writel(0x0f000000, &dev->regs->i2c_magic2);
97
98 vfc_memptr_reset(dev);
99
100 dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
101 dev->control_reg &= ~VFC_CONTROL_CAPTURE;
102 dev->control_reg |= 0x40000000;
103 sbus_writel(dev->control_reg, &dev->regs->control);
104
105 vfc_captstat_reset(dev);
106
107 return 0;
108}
109
110int vfc_saa9051_init(struct vfc_dev *dev)
111{
112 int i;
113
114 for (i = 0; i < VFC_SAA9051_NR; i++)
115 dev->saa9051_state_array[i] = saa9051_init_array[i];
116
117 vfc_i2c_sendbuf(dev,VFC_SAA9051_ADDR,
118 dev->saa9051_state_array, VFC_SAA9051_NR);
119 return 0;
120}
121
122int init_vfc_hw(struct vfc_dev *dev)
123{
124 vfc_lock_device(dev);
125 vfc_csr_init(dev);
126
127 vfc_pcf8584_init(dev);
128 vfc_init_i2c_bus(dev); /* hopefully this doesn't undo the magic
129 sun code above*/
130 vfc_saa9051_init(dev);
131 vfc_unlock_device(dev);
132 return 0;
133}
134
135int init_vfc_devstruct(struct vfc_dev *dev, int instance)
136{
137 dev->instance=instance;
138 init_MUTEX(&dev->device_lock_sem);
139 dev->control_reg=0;
140 init_waitqueue_head(&dev->poll_wait);
141 dev->busy=0;
142 return 0;
143}
144
145int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev, int instance)
146{
147 if(dev == NULL) {
148 printk(KERN_ERR "VFC: Bogus pointer passed\n");
149 return -ENOMEM;
150 }
151 printk("Initializing vfc%d\n",instance);
152 dev->regs = NULL;
153 dev->regs = (volatile struct vfc_regs *)
154 sbus_ioremap(&sdev->resource[0], 0,
155 sizeof(struct vfc_regs), vfcstr);
156 dev->which_io = sdev->reg_addrs[0].which_io;
157 dev->phys_regs = (struct vfc_regs *) sdev->reg_addrs[0].phys_addr;
158 if (dev->regs == NULL)
159 return -EIO;
160
161 printk("vfc%d: registers mapped at phys_addr: 0x%lx\n virt_addr: 0x%lx\n",
162 instance,(unsigned long)sdev->reg_addrs[0].phys_addr,(unsigned long)dev->regs);
163
164 if (init_vfc_devstruct(dev, instance))
165 return -EINVAL;
166 if (init_vfc_hw(dev))
167 return -EIO;
168
169 devfs_mk_cdev(MKDEV(VFC_MAJOR, instance),
170 S_IFCHR | S_IRUSR | S_IWUSR,
171 "vfc/%d", instance);
172 return 0;
173}
174
175
176struct vfc_dev *vfc_get_dev_ptr(int instance)
177{
178 return vfc_dev_lst[instance];
179}
180
181static DEFINE_SPINLOCK(vfc_dev_lock);
182
183static int vfc_open(struct inode *inode, struct file *file)
184{
185 struct vfc_dev *dev;
186
187 spin_lock(&vfc_dev_lock);
188 dev = vfc_get_dev_ptr(iminor(inode));
189 if (dev == NULL) {
190 spin_unlock(&vfc_dev_lock);
191 return -ENODEV;
192 }
193 if (dev->busy) {
194 spin_unlock(&vfc_dev_lock);
195 return -EBUSY;
196 }
197
198 dev->busy = 1;
199 spin_unlock(&vfc_dev_lock);
200
201 vfc_lock_device(dev);
202
203 vfc_csr_init(dev);
204 vfc_pcf8584_init(dev);
205 vfc_init_i2c_bus(dev);
206 vfc_saa9051_init(dev);
207 vfc_memptr_reset(dev);
208 vfc_captstat_reset(dev);
209
210 vfc_unlock_device(dev);
211 return 0;
212}
213
214static int vfc_release(struct inode *inode,struct file *file)
215{
216 struct vfc_dev *dev;
217
218 spin_lock(&vfc_dev_lock);
219 dev = vfc_get_dev_ptr(iminor(inode));
220 if (!dev || !dev->busy) {
221 spin_unlock(&vfc_dev_lock);
222 return -EINVAL;
223 }
224 dev->busy = 0;
225 spin_unlock(&vfc_dev_lock);
226 return 0;
227}
228
229static int vfc_debug(struct vfc_dev *dev, int cmd, void __user *argp)
230{
231 struct vfc_debug_inout inout;
232 unsigned char *buffer;
233
234 if (!capable(CAP_SYS_ADMIN))
235 return -EPERM;
236
237 switch(cmd) {
238 case VFC_I2C_SEND:
239 if(copy_from_user(&inout, argp, sizeof(inout)))
240 return -EFAULT;
241
242 buffer = kmalloc(inout.len, GFP_KERNEL);
243 if (buffer == NULL)
244 return -ENOMEM;
245
246 if(copy_from_user(buffer, inout.buffer, inout.len)) {
247 kfree(buffer);
248 return -EFAULT;
249 }
250
251
252 vfc_lock_device(dev);
253 inout.ret=
254 vfc_i2c_sendbuf(dev,inout.addr & 0xff,
255 buffer,inout.len);
256
257 if (copy_to_user(argp,&inout,sizeof(inout))) {
258 kfree(buffer);
259 return -EFAULT;
260 }
261 vfc_unlock_device(dev);
262
263 break;
264 case VFC_I2C_RECV:
265 if (copy_from_user(&inout, argp, sizeof(inout)))
266 return -EFAULT;
267
268 buffer = kmalloc(inout.len, GFP_KERNEL);
269 if (buffer == NULL)
270 return -ENOMEM;
271
272 memset(buffer,0,inout.len);
273 vfc_lock_device(dev);
274 inout.ret=
275 vfc_i2c_recvbuf(dev,inout.addr & 0xff
276 ,buffer,inout.len);
277 vfc_unlock_device(dev);
278
279 if (copy_to_user(inout.buffer, buffer, inout.len)) {
280 kfree(buffer);
281 return -EFAULT;
282 }
283 if (copy_to_user(argp,&inout,sizeof(inout))) {
284 kfree(buffer);
285 return -EFAULT;
286 }
287 kfree(buffer);
288 break;
289 default:
290 return -EINVAL;
291 };
292
293 return 0;
294}
295
296int vfc_capture_start(struct vfc_dev *dev)
297{
298 vfc_captstat_reset(dev);
299 dev->control_reg = sbus_readl(&dev->regs->control);
300 if((dev->control_reg & VFC_STATUS_CAPTURE)) {
301 printk(KERN_ERR "vfc%d: vfc capture status not reset\n",
302 dev->instance);
303 return -EIO;
304 }
305
306 vfc_lock_device(dev);
307 dev->control_reg &= ~VFC_CONTROL_CAPTURE;
308 sbus_writel(dev->control_reg, &dev->regs->control);
309 dev->control_reg |= VFC_CONTROL_CAPTURE;
310 sbus_writel(dev->control_reg, &dev->regs->control);
311 dev->control_reg &= ~VFC_CONTROL_CAPTURE;
312 sbus_writel(dev->control_reg, &dev->regs->control);
313 vfc_unlock_device(dev);
314
315 return 0;
316}
317
318int vfc_capture_poll(struct vfc_dev *dev)
319{
320 int timeout = 1000;
321
322 while (!timeout--) {
323 if (dev->regs->control & VFC_STATUS_CAPTURE)
324 break;
325 vfc_i2c_delay_no_busy(dev, 100);
326 }
327 if(!timeout) {
328 printk(KERN_WARNING "vfc%d: capture timed out\n",
329 dev->instance);
330 return -ETIMEDOUT;
331 }
332 return 0;
333}
334
335
336
337static int vfc_set_control_ioctl(struct inode *inode, struct file *file,
338 struct vfc_dev *dev, unsigned long arg)
339{
340 int setcmd, ret = 0;
341
342 if (copy_from_user(&setcmd,(void __user *)arg,sizeof(unsigned int)))
343 return -EFAULT;
344
345 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
346 dev->instance,setcmd));
347
348 switch(setcmd) {
349 case MEMPRST:
350 vfc_lock_device(dev);
351 vfc_memptr_reset(dev);
352 vfc_unlock_device(dev);
353 ret=0;
354 break;
355 case CAPTRCMD:
356 vfc_capture_start(dev);
357 vfc_capture_poll(dev);
358 break;
359 case DIAGMODE:
360 if(capable(CAP_SYS_ADMIN)) {
361 vfc_lock_device(dev);
362 dev->control_reg |= VFC_CONTROL_DIAGMODE;
363 sbus_writel(dev->control_reg, &dev->regs->control);
364 vfc_unlock_device(dev);
365 ret = 0;
366 } else {
367 ret = -EPERM;
368 }
369 break;
370 case NORMMODE:
371 vfc_lock_device(dev);
372 dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
373 sbus_writel(dev->control_reg, &dev->regs->control);
374 vfc_unlock_device(dev);
375 ret = 0;
376 break;
377 case CAPTRSTR:
378 vfc_capture_start(dev);
379 ret = 0;
380 break;
381 case CAPTRWAIT:
382 vfc_capture_poll(dev);
383 ret = 0;
384 break;
385 default:
386 ret = -EINVAL;
387 break;
388 };
389
390 return ret;
391}
392
393
394int vfc_port_change_ioctl(struct inode *inode, struct file *file,
395 struct vfc_dev *dev, unsigned long arg)
396{
397 int ret = 0;
398 int cmd;
399
400 if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
401 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
402 "vfc_port_change_ioctl\n",
403 dev->instance));
404 return -EFAULT;
405 }
406
407 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCPORTCHG) arg=0x%x\n",
408 dev->instance, cmd));
409
410 switch(cmd) {
411 case 1:
412 case 2:
413 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x72;
414 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x52;
415 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0x36;
416 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0x18;
417 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BP2;
418 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_CT | VFC_SAA9051_SS3;
419 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0x3e;
420 break;
421 case 3:
422 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x3a;
423 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x17;
424 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0xfa;
425 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0xde;
426 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) =
427 VFC_SAA9051_BY | VFC_SAA9051_PF | VFC_SAA9051_BP2;
428 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_YC;
429 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0;
430 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
431 ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
432 break;
433 default:
434 ret = -EINVAL;
435 return ret;
436 break;
437 }
438
439 switch(cmd) {
440 case 1:
441 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |=
442 (VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
443 break;
444 case 2:
445 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
446 ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
447 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0;
448 break;
449 case 3:
450 break;
451 default:
452 ret = -EINVAL;
453 return ret;
454 break;
455 }
456 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) &= ~(VFC_SAA9051_SS2);
457 ret=vfc_update_saa9051(dev);
458 udelay(500);
459 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) |= (VFC_SAA9051_SS2);
460 ret=vfc_update_saa9051(dev);
461 return ret;
462}
463
464int vfc_set_video_ioctl(struct inode *inode, struct file *file,
465 struct vfc_dev *dev, unsigned long arg)
466{
467 int ret = 0;
468 int cmd;
469
470 if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
471 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
472 "vfc_set_video_ioctl\n",
473 dev->instance));
474 return ret;
475 }
476
477 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSVID) arg=0x%x\n",
478 dev->instance, cmd));
479 switch(cmd) {
480 case STD_NTSC:
481 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~VFC_SAA9051_ALT;
482 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_YPN |
483 VFC_SAA9051_CCFR0 | VFC_SAA9051_CCFR1 | VFC_SAA9051_FS;
484 ret = vfc_update_saa9051(dev);
485 break;
486 case STD_PAL:
487 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_YPN |
488 VFC_SAA9051_CCFR1 |
489 VFC_SAA9051_CCFR0 |
490 VFC_SAA9051_FS);
491 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_ALT;
492 ret = vfc_update_saa9051(dev);
493 break;
494
495 case COLOR_ON:
496 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_CO;
497 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) &=
498 ~(VFC_SAA9051_BY | VFC_SAA9051_PF);
499 ret = vfc_update_saa9051(dev);
500 break;
501 case MONO:
502 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_CO);
503 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) |=
504 (VFC_SAA9051_BY | VFC_SAA9051_PF);
505 ret = vfc_update_saa9051(dev);
506 break;
507 default:
508 ret = -EINVAL;
509 break;
510 };
511
512 return ret;
513}
514
515int vfc_get_video_ioctl(struct inode *inode, struct file *file,
516 struct vfc_dev *dev, unsigned long arg)
517{
518 int ret = 0;
519 unsigned int status = NO_LOCK;
520 unsigned char buf[1];
521
522 if(vfc_i2c_recvbuf(dev, VFC_SAA9051_ADDR, buf, 1)) {
523 printk(KERN_ERR "vfc%d: Unable to get status\n",
524 dev->instance);
525 return -EIO;
526 }
527
528 if(buf[0] & VFC_SAA9051_HLOCK) {
529 status = NO_LOCK;
530 } else if(buf[0] & VFC_SAA9051_FD) {
531 if(buf[0] & VFC_SAA9051_CD)
532 status = NTSC_COLOR;
533 else
534 status = NTSC_NOCOLOR;
535 } else {
536 if(buf[0] & VFC_SAA9051_CD)
537 status = PAL_COLOR;
538 else
539 status = PAL_NOCOLOR;
540 }
541 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; "
542 "buf[0]=%x\n", dev->instance, status, buf[0]));
543
544 if (copy_to_user((void __user *)arg,&status,sizeof(unsigned int))) {
545 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
546 "vfc_get_video_ioctl\n",
547 dev->instance));
548 return ret;
549 }
550 return ret;
551}
552
553static int vfc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
554 unsigned long arg)
555{
556 int ret = 0;
557 unsigned int tmp;
558 struct vfc_dev *dev;
559 void __user *argp = (void __user *)arg;
560
561 dev = vfc_get_dev_ptr(iminor(inode));
562 if(dev == NULL)
563 return -ENODEV;
564
565 switch(cmd & 0x0000ffff) {
566 case VFCGCTRL:
567#if 0
568 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGCTRL)\n", dev->instance));
569#endif
570 tmp = sbus_readl(&dev->regs->control);
571 if(copy_to_user(argp, &tmp, sizeof(unsigned int))) {
572 ret = -EFAULT;
573 break;
574 }
575 ret = 0;
576 break;
577 case VFCSCTRL:
578 ret = vfc_set_control_ioctl(inode, file, dev, arg);
579 break;
580 case VFCGVID:
581 ret = vfc_get_video_ioctl(inode, file, dev, arg);
582 break;
583 case VFCSVID:
584 ret = vfc_set_video_ioctl(inode, file, dev, arg);
585 break;
586 case VFCHUE:
587 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCHUE)\n", dev->instance));
588 if(copy_from_user(&tmp,argp,sizeof(unsigned int))) {
589 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer "
590 "to IOCTL(VFCHUE)", dev->instance));
591 ret = -EFAULT;
592 } else {
593 VFC_SAA9051_SA(dev,VFC_SAA9051_HUE) = tmp;
594 vfc_update_saa9051(dev);
595 ret = 0;
596 }
597 break;
598 case VFCPORTCHG:
599 ret = vfc_port_change_ioctl(inode, file, dev, arg);
600 break;
601 case VFCRDINFO:
602 ret = -EINVAL;
603 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCRDINFO)\n", dev->instance));
604 break;
605 default:
606 ret = vfc_debug(vfc_get_dev_ptr(iminor(inode)), cmd, argp);
607 break;
608 };
609
610 return ret;
611}
612
613static int vfc_mmap(struct file *file, struct vm_area_struct *vma)
614{
615 unsigned int map_size, ret, map_offset;
616 struct vfc_dev *dev;
617
618 dev = vfc_get_dev_ptr(iminor(file->f_dentry->d_inode));
619 if(dev == NULL)
620 return -ENODEV;
621
622 map_size = vma->vm_end - vma->vm_start;
623 if(map_size > sizeof(struct vfc_regs))
624 map_size = sizeof(struct vfc_regs);
625
626 vma->vm_flags |=
627 (VM_SHM | VM_LOCKED | VM_IO | VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
628 map_offset = (unsigned int) (long)dev->phys_regs;
629 ret = io_remap_pfn_range(vma, vma->vm_start,
630 MK_IOSPACE_PFN(dev->which_io,
631 map_offset >> PAGE_SHIFT),
632 map_size, vma->vm_page_prot);
633
634 if(ret)
635 return -EAGAIN;
636
637 return 0;
638}
639
640
641static struct file_operations vfc_fops = {
642 .owner = THIS_MODULE,
643 .llseek = no_llseek,
644 .ioctl = vfc_ioctl,
645 .mmap = vfc_mmap,
646 .open = vfc_open,
647 .release = vfc_release,
648};
649
650static int vfc_probe(void)
651{
652 struct sbus_bus *sbus;
653 struct sbus_dev *sdev = NULL;
654 int ret;
655 int instance = 0, cards = 0;
656
657 for_all_sbusdev(sdev, sbus) {
658 if (strcmp(sdev->prom_name, "vfc") == 0) {
659 cards++;
660 continue;
661 }
662 }
663
664 if (!cards)
665 return -ENODEV;
666
667 vfc_dev_lst = (struct vfc_dev **)kmalloc(sizeof(struct vfc_dev *) *
668 (cards+1),
669 GFP_KERNEL);
670 if (vfc_dev_lst == NULL)
671 return -ENOMEM;
672 memset(vfc_dev_lst, 0, sizeof(struct vfc_dev *) * (cards + 1));
673 vfc_dev_lst[cards] = NULL;
674
675 ret = register_chrdev(VFC_MAJOR, vfcstr, &vfc_fops);
676 if(ret) {
677 printk(KERN_ERR "Unable to get major number %d\n", VFC_MAJOR);
678 kfree(vfc_dev_lst);
679 return -EIO;
680 }
681 devfs_mk_dir("vfc");
682 instance = 0;
683 for_all_sbusdev(sdev, sbus) {
684 if (strcmp(sdev->prom_name, "vfc") == 0) {
685 vfc_dev_lst[instance]=(struct vfc_dev *)
686 kmalloc(sizeof(struct vfc_dev), GFP_KERNEL);
687 if (vfc_dev_lst[instance] == NULL)
688 return -ENOMEM;
689 ret = init_vfc_device(sdev,
690 vfc_dev_lst[instance],
691 instance);
692 if(ret) {
693 printk(KERN_ERR "Unable to initialize"
694 " vfc%d device\n",
695 instance);
696 } else {
697 }
698
699 instance++;
700 continue;
701 }
702 }
703
704 return 0;
705}
706
707#ifdef MODULE
708int init_module(void)
709#else
710int vfc_init(void)
711#endif
712{
713 return vfc_probe();
714}
715
716#ifdef MODULE
717static void deinit_vfc_device(struct vfc_dev *dev)
718{
719 if(dev == NULL)
720 return;
721 devfs_remove("vfc/%d", dev->instance);
722 sbus_iounmap((unsigned long)dev->regs, sizeof(struct vfc_regs));
723 kfree(dev);
724}
725
726void cleanup_module(void)
727{
728 struct vfc_dev **devp;
729
730 unregister_chrdev(VFC_MAJOR,vfcstr);
731
732 for (devp = vfc_dev_lst; *devp; devp++)
733 deinit_vfc_device(*devp);
734
735 devfs_remove("vfc");
736 kfree(vfc_dev_lst);
737 return;
738}
739#endif
740
741MODULE_LICENSE("GPL");
742
diff --git a/drivers/sbus/char/vfc_i2c.c b/drivers/sbus/char/vfc_i2c.c
new file mode 100644
index 00000000000..95e3cebf792
--- /dev/null
+++ b/drivers/sbus/char/vfc_i2c.c
@@ -0,0 +1,347 @@
1/*
2 * drivers/sbus/char/vfc_i2c.c
3 *
4 * Driver for the Videopix Frame Grabber.
5 *
6 * Functions that support the Phillips i2c(I squared C) bus on the vfc
7 * Documentation for the Phillips I2C bus can be found on the
8 * phillips home page
9 *
10 * Copyright (C) 1996 Manish Vachharajani (mvachhar@noc.rutgers.edu)
11 *
12 */
13
14/* NOTE: It seems to me that the documentation regarding the
15pcd8584t/pcf8584 does not show the correct way to address the i2c bus.
16Based on the information on the I2C bus itself and the remainder of
17the Phillips docs the following algorithims apper to be correct. I am
18fairly certain that the flowcharts in the phillips docs are wrong. */
19
20
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/slab.h>
24#include <linux/errno.h>
25#include <linux/sched.h>
26#include <linux/wait.h>
27#include <linux/delay.h>
28#include <asm/openprom.h>
29#include <asm/oplib.h>
30#include <asm/io.h>
31#include <asm/system.h>
32#include <asm/sbus.h>
33
34#if 0
35#define VFC_I2C_DEBUG
36#endif
37
38#include "vfc.h"
39#include "vfc_i2c.h"
40
41#define WRITE_S1(__val) \
42 sbus_writel(__val, &dev->regs->i2c_s1)
43#define WRITE_REG(__val) \
44 sbus_writel(__val, &dev->regs->i2c_reg)
45
46#define VFC_I2C_READ (0x1)
47#define VFC_I2C_WRITE (0x0)
48
49/******
50 The i2c bus controller chip on the VFC is a pcd8584t, but
51 phillips claims it doesn't exist. As far as I can tell it is
52 identical to the PCF8584 so I treat it like it is the pcf8584.
53
54 NOTE: The pcf8584 only cares
55 about the msb of the word you feed it
56*****/
57
58int vfc_pcf8584_init(struct vfc_dev *dev)
59{
60 /* This will also choose register S0_OWN so we can set it. */
61 WRITE_S1(RESET);
62
63 /* The pcf8584 shifts this value left one bit and uses
64 * it as its i2c bus address.
65 */
66 WRITE_REG(0x55000000);
67
68 /* This will set the i2c bus at the same speed sun uses,
69 * and set another magic bit.
70 */
71 WRITE_S1(SELECT(S2));
72 WRITE_REG(0x14000000);
73
74 /* Enable the serial port, idle the i2c bus and set
75 * the data reg to s0.
76 */
77 WRITE_S1(CLEAR_I2C_BUS);
78 udelay(100);
79 return 0;
80}
81
82void vfc_i2c_delay_wakeup(struct vfc_dev *dev)
83{
84 /* Used to profile code and eliminate too many delays */
85 VFC_I2C_DEBUG_PRINTK(("vfc%d: Delaying\n", dev->instance));
86 wake_up(&dev->poll_wait);
87}
88
89void vfc_i2c_delay_no_busy(struct vfc_dev *dev, unsigned long usecs)
90{
91 init_timer(&dev->poll_timer);
92 dev->poll_timer.expires = jiffies +
93 ((unsigned long)usecs*(HZ))/1000000;
94 dev->poll_timer.data=(unsigned long)dev;
95 dev->poll_timer.function=(void *)(unsigned long)vfc_i2c_delay_wakeup;
96 add_timer(&dev->poll_timer);
97 sleep_on(&dev->poll_wait);
98 del_timer(&dev->poll_timer);
99}
100
101void inline vfc_i2c_delay(struct vfc_dev *dev)
102{
103 vfc_i2c_delay_no_busy(dev, 100);
104}
105
106int vfc_init_i2c_bus(struct vfc_dev *dev)
107{
108 WRITE_S1(ENABLE_SERIAL | SELECT(S0) | ACK);
109 vfc_i2c_reset_bus(dev);
110 return 0;
111}
112
113int vfc_i2c_reset_bus(struct vfc_dev *dev)
114{
115 VFC_I2C_DEBUG_PRINTK((KERN_DEBUG "vfc%d: Resetting the i2c bus\n",
116 dev->instance));
117 if(dev == NULL)
118 return -EINVAL;
119 if(dev->regs == NULL)
120 return -EINVAL;
121 WRITE_S1(SEND_I2C_STOP);
122 WRITE_S1(SEND_I2C_STOP | ACK);
123 vfc_i2c_delay(dev);
124 WRITE_S1(CLEAR_I2C_BUS);
125 VFC_I2C_DEBUG_PRINTK((KERN_DEBUG "vfc%d: I2C status %x\n",
126 dev->instance,
127 sbus_readl(&dev->regs->i2c_s1)));
128 return 0;
129}
130
131int vfc_i2c_wait_for_bus(struct vfc_dev *dev)
132{
133 int timeout = 1000;
134
135 while(!(sbus_readl(&dev->regs->i2c_s1) & BB)) {
136 if(!(timeout--))
137 return -ETIMEDOUT;
138 vfc_i2c_delay(dev);
139 }
140 return 0;
141}
142
143int vfc_i2c_wait_for_pin(struct vfc_dev *dev, int ack)
144{
145 int timeout = 1000;
146 int s1;
147
148 while ((s1 = sbus_readl(&dev->regs->i2c_s1)) & PIN) {
149 if (!(timeout--))
150 return -ETIMEDOUT;
151 vfc_i2c_delay(dev);
152 }
153 if (ack == VFC_I2C_ACK_CHECK) {
154 if(s1 & LRB)
155 return -EIO;
156 }
157 return 0;
158}
159
160#define SHIFT(a) ((a) << 24)
161int vfc_i2c_xmit_addr(struct vfc_dev *dev, unsigned char addr, char mode)
162{
163 int ret, raddr;
164#if 1
165 WRITE_S1(SEND_I2C_STOP | ACK);
166 WRITE_S1(SELECT(S0) | ENABLE_SERIAL);
167 vfc_i2c_delay(dev);
168#endif
169
170 switch(mode) {
171 case VFC_I2C_READ:
172 raddr = SHIFT(((unsigned int)addr | 0x1));
173 WRITE_REG(raddr);
174 VFC_I2C_DEBUG_PRINTK(("vfc%d: receiving from i2c addr 0x%x\n",
175 dev->instance, addr | 0x1));
176 break;
177 case VFC_I2C_WRITE:
178 raddr = SHIFT((unsigned int)addr & ~0x1);
179 WRITE_REG(raddr);
180 VFC_I2C_DEBUG_PRINTK(("vfc%d: sending to i2c addr 0x%x\n",
181 dev->instance, addr & ~0x1));
182 break;
183 default:
184 return -EINVAL;
185 };
186
187 WRITE_S1(SEND_I2C_START);
188 vfc_i2c_delay(dev);
189 ret = vfc_i2c_wait_for_pin(dev,VFC_I2C_ACK_CHECK); /* We wait
190 for the
191 i2c send
192 to finish
193 here but
194 Sun
195 doesn't,
196 hmm */
197 if (ret) {
198 printk(KERN_ERR "vfc%d: VFC xmit addr timed out or no ack\n",
199 dev->instance);
200 return ret;
201 } else if (mode == VFC_I2C_READ) {
202 if ((ret = sbus_readl(&dev->regs->i2c_reg) & 0xff000000) != raddr) {
203 printk(KERN_WARNING
204 "vfc%d: returned slave address "
205 "mismatch(%x,%x)\n",
206 dev->instance, raddr, ret);
207 }
208 }
209 return 0;
210}
211
212int vfc_i2c_xmit_byte(struct vfc_dev *dev,unsigned char *byte)
213{
214 int ret;
215 u32 val = SHIFT((unsigned int)*byte);
216
217 WRITE_REG(val);
218
219 ret = vfc_i2c_wait_for_pin(dev, VFC_I2C_ACK_CHECK);
220 switch(ret) {
221 case -ETIMEDOUT:
222 printk(KERN_ERR "vfc%d: VFC xmit byte timed out or no ack\n",
223 dev->instance);
224 break;
225 case -EIO:
226 ret = XMIT_LAST_BYTE;
227 break;
228 default:
229 break;
230 };
231
232 return ret;
233}
234
235int vfc_i2c_recv_byte(struct vfc_dev *dev, unsigned char *byte, int last)
236{
237 int ret;
238
239 if (last) {
240 WRITE_REG(NEGATIVE_ACK);
241 VFC_I2C_DEBUG_PRINTK(("vfc%d: sending negative ack\n",
242 dev->instance));
243 } else {
244 WRITE_S1(ACK);
245 }
246
247 ret = vfc_i2c_wait_for_pin(dev, VFC_I2C_NO_ACK_CHECK);
248 if(ret) {
249 printk(KERN_ERR "vfc%d: "
250 "VFC recv byte timed out\n",
251 dev->instance);
252 }
253 *byte = (sbus_readl(&dev->regs->i2c_reg)) >> 24;
254 return ret;
255}
256
257int vfc_i2c_recvbuf(struct vfc_dev *dev, unsigned char addr,
258 char *buf, int count)
259{
260 int ret, last;
261
262 if(!(count && buf && dev && dev->regs) )
263 return -EINVAL;
264
265 if ((ret = vfc_i2c_wait_for_bus(dev))) {
266 printk(KERN_ERR "vfc%d: VFC I2C bus busy\n", dev->instance);
267 return ret;
268 }
269
270 if ((ret = vfc_i2c_xmit_addr(dev, addr, VFC_I2C_READ))) {
271 WRITE_S1(SEND_I2C_STOP);
272 vfc_i2c_delay(dev);
273 return ret;
274 }
275
276 last = 0;
277 while (count--) {
278 if (!count)
279 last = 1;
280 if ((ret = vfc_i2c_recv_byte(dev, buf, last))) {
281 printk(KERN_ERR "vfc%d: "
282 "VFC error while receiving byte\n",
283 dev->instance);
284 WRITE_S1(SEND_I2C_STOP);
285 ret = -EINVAL;
286 }
287 buf++;
288 }
289 WRITE_S1(SEND_I2C_STOP | ACK);
290 vfc_i2c_delay(dev);
291 return ret;
292}
293
294int vfc_i2c_sendbuf(struct vfc_dev *dev, unsigned char addr,
295 char *buf, int count)
296{
297 int ret;
298
299 if (!(buf && dev && dev->regs))
300 return -EINVAL;
301
302 if ((ret = vfc_i2c_wait_for_bus(dev))) {
303 printk(KERN_ERR "vfc%d: VFC I2C bus busy\n", dev->instance);
304 return ret;
305 }
306
307 if ((ret = vfc_i2c_xmit_addr(dev, addr, VFC_I2C_WRITE))) {
308 WRITE_S1(SEND_I2C_STOP);
309 vfc_i2c_delay(dev);
310 return ret;
311 }
312
313 while(count--) {
314 ret = vfc_i2c_xmit_byte(dev, buf);
315 switch(ret) {
316 case XMIT_LAST_BYTE:
317 VFC_I2C_DEBUG_PRINTK(("vfc%d: "
318 "Receiver ended transmission with "
319 " %d bytes remaining\n",
320 dev->instance, count));
321 ret = 0;
322 goto done;
323 break;
324 case 0:
325 break;
326 default:
327 printk(KERN_ERR "vfc%d: "
328 "VFC error while sending byte\n", dev->instance);
329 break;
330 };
331
332 buf++;
333 }
334done:
335 WRITE_S1(SEND_I2C_STOP | ACK);
336 vfc_i2c_delay(dev);
337 return ret;
338}
339
340
341
342
343
344
345
346
347
diff --git a/drivers/sbus/char/vfc_i2c.h b/drivers/sbus/char/vfc_i2c.h
new file mode 100644
index 00000000000..a2e6973209d
--- /dev/null
+++ b/drivers/sbus/char/vfc_i2c.h
@@ -0,0 +1,44 @@
1#ifndef _LINUX_VFC_I2C_H_
2#define _LINUX_VFC_I2C_H_
3
4/* control bits */
5#define PIN (0x80000000)
6#define ESO (0x40000000)
7#define ES1 (0x20000000)
8#define ES2 (0x10000000)
9#define ENI (0x08000000)
10#define STA (0x04000000)
11#define STO (0x02000000)
12#define ACK (0x01000000)
13
14/* status bits */
15#define STS (0x20000000)
16#define BER (0x10000000)
17#define LRB (0x08000000)
18#define AAS (0x04000000)
19#define LAB (0x02000000)
20#define BB (0x01000000)
21
22#define SEND_I2C_START (PIN | ESO | STA)
23#define SEND_I2C_STOP (PIN | ESO | STO)
24#define CLEAR_I2C_BUS (PIN | ESO | ACK)
25#define NEGATIVE_ACK ((ESO) & ~ACK)
26
27#define SELECT(a) (a)
28#define S0 (PIN | ESO | ES1)
29#define S0_OWN (PIN)
30#define S2 (PIN | ES1)
31#define S3 (PIN | ES2)
32
33#define ENABLE_SERIAL (PIN | ESO)
34#define DISABLE_SERIAL (PIN)
35#define RESET (PIN)
36
37#define XMIT_LAST_BYTE (1)
38#define VFC_I2C_ACK_CHECK (1)
39#define VFC_I2C_NO_ACK_CHECK (0)
40
41#endif /* _LINUX_VFC_I2C_H_ */
42
43
44
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 08:17:51 -0500