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authorJiri Slaby <jslaby@suse.cz>2011-08-31 15:24:59 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-09-22 19:00:20 -0400
commit3a0db7215c88077b61a673215756ec4a0dc0c7a5 (patch)
tree0c8825623f26e9ab53309d2e48cd143f066afd45 /drivers/tty
parent3d43b7d59d2cb9171ad5abd830fa094fa3dbb9b8 (diff)
TTY: serial, move 68360 driver to staging
This driver has been broken at least since 2008. At that time, a88487c79b (Fix compile errors in SGI console drivers) broke this driver completely. And since nobody noticed for the past 3 years, move it into staging. I think this will rot there and we will throw it away completely after some time. Or maybe someone will volunteer to fix it ;). Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/68360serial.c2979
-rw-r--r--drivers/tty/serial/Kconfig17
-rw-r--r--drivers/tty/serial/Makefile1
3 files changed, 0 insertions, 2997 deletions
diff --git a/drivers/tty/serial/68360serial.c b/drivers/tty/serial/68360serial.c
deleted file mode 100644
index 0a3e8787ed50..000000000000
--- a/drivers/tty/serial/68360serial.c
+++ /dev/null
@@ -1,2979 +0,0 @@
1/*
2 * UART driver for 68360 CPM SCC or SMC
3 * Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
4 * Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
5 * Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
6 *
7 * I used the serial.c driver as the framework for this driver.
8 * Give credit to those guys.
9 * The original code was written for the MBX860 board. I tried to make
10 * it generic, but there may be some assumptions in the structures that
11 * have to be fixed later.
12 * To save porting time, I did not bother to change any object names
13 * that are not accessed outside of this file.
14 * It still needs lots of work........When it was easy, I included code
15 * to support the SCCs, but this has never been tested, nor is it complete.
16 * Only the SCCs support modem control, so that is not complete either.
17 *
18 * This module exports the following rs232 io functions:
19 *
20 * int rs_360_init(void);
21 */
22
23#include <linux/module.h>
24#include <linux/errno.h>
25#include <linux/signal.h>
26#include <linux/sched.h>
27#include <linux/timer.h>
28#include <linux/interrupt.h>
29#include <linux/tty.h>
30#include <linux/tty_flip.h>
31#include <linux/serial.h>
32#include <linux/serialP.h>
33#include <linux/major.h>
34#include <linux/string.h>
35#include <linux/fcntl.h>
36#include <linux/ptrace.h>
37#include <linux/mm.h>
38#include <linux/init.h>
39#include <linux/delay.h>
40#include <asm/irq.h>
41#include <asm/m68360.h>
42#include <asm/commproc.h>
43
44
45#ifdef CONFIG_KGDB
46extern void breakpoint(void);
47extern void set_debug_traps(void);
48extern int kgdb_output_string (const char* s, unsigned int count);
49#endif
50
51
52/* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
53#include <linux/console.h>
54#include <linux/jiffies.h>
55
56/* this defines the index into rs_table for the port to use
57 */
58#ifndef CONFIG_SERIAL_CONSOLE_PORT
59#define CONFIG_SERIAL_CONSOLE_PORT 1 /* ie SMC2 - note USE_SMC2 must be defined */
60#endif
61/* #endif */
62
63#if 0
64/* SCC2 for console
65 */
66#undef CONFIG_SERIAL_CONSOLE_PORT
67#define CONFIG_SERIAL_CONSOLE_PORT 2
68#endif
69
70
71#define TX_WAKEUP ASYNC_SHARE_IRQ
72
73static char *serial_name = "CPM UART driver";
74static char *serial_version = "0.03";
75
76static struct tty_driver *serial_driver;
77int serial_console_setup(struct console *co, char *options);
78
79/*
80 * Serial driver configuration section. Here are the various options:
81 */
82#define SERIAL_PARANOIA_CHECK
83#define CONFIG_SERIAL_NOPAUSE_IO
84#define SERIAL_DO_RESTART
85
86/* Set of debugging defines */
87
88#undef SERIAL_DEBUG_INTR
89#undef SERIAL_DEBUG_OPEN
90#undef SERIAL_DEBUG_FLOW
91#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
92
93#define _INLINE_ inline
94
95#define DBG_CNT(s)
96
97/* We overload some of the items in the data structure to meet our
98 * needs. For example, the port address is the CPM parameter ram
99 * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and
100 * 2 SMCs. The "hub6" field is used to indicate the channel number, with
101 * a flag indicating SCC or SMC, and the number is used as an index into
102 * the CPM parameter area for this device.
103 * The "type" field is currently set to 0, for PORT_UNKNOWN. It is
104 * not currently used. I should probably use it to indicate the port
105 * type of SMC or SCC.
106 * The SMCs do not support any modem control signals.
107 */
108#define smc_scc_num hub6
109#define NUM_IS_SCC ((int)0x00010000)
110#define PORT_NUM(P) ((P) & 0x0000ffff)
111
112
113#if defined (CONFIG_UCQUICC)
114
115volatile extern void *_periph_base;
116/* sipex transceiver
117 * mode bits for are on pins
118 *
119 * SCC2 d16..19
120 * SCC3 d20..23
121 * SCC4 d24..27
122 */
123#define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
124
125static uint sipex_mode_bits = 0x00000000;
126
127#endif
128
129/* There is no `serial_state' defined back here in 2.0.
130 * Try to get by with serial_struct
131 */
132/* #define serial_state serial_struct */
133
134/* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
135 * extras: */
136
137#if 0
138struct async_icount_24 {
139 __u32 cts, dsr, rng, dcd, tx, rx;
140 __u32 frame, parity, overrun, brk;
141 __u32 buf_overrun;
142} icount;
143#endif
144
145#if 0
146
147struct serial_state {
148 int magic;
149 int baud_base;
150 unsigned long port;
151 int irq;
152 int flags;
153 int hub6;
154 int type;
155 int line;
156 int revision; /* Chip revision (950) */
157 int xmit_fifo_size;
158 int custom_divisor;
159 int count;
160 u8 *iomem_base;
161 u16 iomem_reg_shift;
162 unsigned short close_delay;
163 unsigned short closing_wait; /* time to wait before closing */
164 struct async_icount_24 icount;
165 int io_type;
166 struct async_struct *info;
167};
168#endif
169
170#define SSTATE_MAGIC 0x5302
171
172
173
174/* SMC2 is sometimes used for low performance TDM interfaces. Define
175 * this as 1 if you want SMC2 as a serial port UART managed by this driver.
176 * Define this as 0 if you wish to use SMC2 for something else.
177 */
178#define USE_SMC2 1
179
180#if 0
181/* Define SCC to ttySx mapping. */
182#define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */
183
184/* Define which SCC is the first one to use for a serial port. These
185 * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
186 * for Ethernet, and the first available SCC for serial UART is SCC2.
187 * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and
188 * interrupt vectors in the table below to match.
189 */
190#define SCC_IDX_BASE 1 /* table index */
191#endif
192
193
194/* Processors other than the 860 only get SMCs configured by default.
195 * Either they don't have SCCs or they are allocated somewhere else.
196 * Of course, there are now 860s without some SCCs, so we will need to
197 * address that someday.
198 * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
199 * stereo codec parts, and we use SMC2 to help support that.
200 */
201static struct serial_state rs_table[] = {
202/* type line PORT IRQ FLAGS smc_scc_num (F.K.A. hub6) */
203 { 0, 0, PRSLOT_SMC1, CPMVEC_SMC1, 0, 0 } /* SMC1 ttyS0 */
204#if USE_SMC2
205 ,{ 0, 0, PRSLOT_SMC2, CPMVEC_SMC2, 0, 1 } /* SMC2 ttyS1 */
206#endif
207
208#if defined(CONFIG_SERIAL_68360_SCC)
209 ,{ 0, 0, PRSLOT_SCC2, CPMVEC_SCC2, 0, (NUM_IS_SCC | 1) } /* SCC2 ttyS2 */
210 ,{ 0, 0, PRSLOT_SCC3, CPMVEC_SCC3, 0, (NUM_IS_SCC | 2) } /* SCC3 ttyS3 */
211 ,{ 0, 0, PRSLOT_SCC4, CPMVEC_SCC4, 0, (NUM_IS_SCC | 3) } /* SCC4 ttyS4 */
212#endif
213};
214
215#define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state))
216
217/* The number of buffer descriptors and their sizes.
218 */
219#define RX_NUM_FIFO 4
220#define RX_BUF_SIZE 32
221#define TX_NUM_FIFO 4
222#define TX_BUF_SIZE 32
223
224#define CONSOLE_NUM_FIFO 2
225#define CONSOLE_BUF_SIZE 4
226
227char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
228
229/* The async_struct in serial.h does not really give us what we
230 * need, so define our own here.
231 */
232typedef struct serial_info {
233 int magic;
234 int flags;
235
236 struct serial_state *state;
237 /* struct serial_struct *state; */
238 /* struct async_struct *state; */
239
240 struct tty_struct *tty;
241 int read_status_mask;
242 int ignore_status_mask;
243 int timeout;
244 int line;
245 int x_char; /* xon/xoff character */
246 int close_delay;
247 unsigned short closing_wait;
248 unsigned short closing_wait2;
249 unsigned long event;
250 unsigned long last_active;
251 int blocked_open; /* # of blocked opens */
252 struct work_struct tqueue;
253 struct work_struct tqueue_hangup;
254 wait_queue_head_t open_wait;
255 wait_queue_head_t close_wait;
256
257
258/* CPM Buffer Descriptor pointers.
259 */
260 QUICC_BD *rx_bd_base;
261 QUICC_BD *rx_cur;
262 QUICC_BD *tx_bd_base;
263 QUICC_BD *tx_cur;
264} ser_info_t;
265
266
267/* since kmalloc_init() does not get called until much after this initialization: */
268static ser_info_t quicc_ser_info[NR_PORTS];
269static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
270static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
271
272static void change_speed(ser_info_t *info);
273static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
274
275static inline int serial_paranoia_check(ser_info_t *info,
276 char *name, const char *routine)
277{
278#ifdef SERIAL_PARANOIA_CHECK
279 static const char *badmagic =
280 "Warning: bad magic number for serial struct (%s) in %s\n";
281 static const char *badinfo =
282 "Warning: null async_struct for (%s) in %s\n";
283
284 if (!info) {
285 printk(badinfo, name, routine);
286 return 1;
287 }
288 if (info->magic != SERIAL_MAGIC) {
289 printk(badmagic, name, routine);
290 return 1;
291 }
292#endif
293 return 0;
294}
295
296/*
297 * This is used to figure out the divisor speeds and the timeouts,
298 * indexed by the termio value. The generic CPM functions are responsible
299 * for setting and assigning baud rate generators for us.
300 */
301static int baud_table[] = {
302 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
303 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
304
305/* This sucks. There is a better way: */
306#if defined(CONFIG_CONSOLE_9600)
307 #define CONSOLE_BAUDRATE 9600
308#elif defined(CONFIG_CONSOLE_19200)
309 #define CONSOLE_BAUDRATE 19200
310#elif defined(CONFIG_CONSOLE_115200)
311 #define CONSOLE_BAUDRATE 115200
312#else
313 #warning "console baud rate undefined"
314 #define CONSOLE_BAUDRATE 9600
315#endif
316
317/*
318 * ------------------------------------------------------------
319 * rs_stop() and rs_start()
320 *
321 * This routines are called before setting or resetting tty->stopped.
322 * They enable or disable transmitter interrupts, as necessary.
323 * ------------------------------------------------------------
324 */
325static void rs_360_stop(struct tty_struct *tty)
326{
327 ser_info_t *info = (ser_info_t *)tty->driver_data;
328 int idx;
329 unsigned long flags;
330 volatile struct scc_regs *sccp;
331 volatile struct smc_regs *smcp;
332
333 if (serial_paranoia_check(info, tty->name, "rs_stop"))
334 return;
335
336 local_irq_save(flags);
337 idx = PORT_NUM(info->state->smc_scc_num);
338 if (info->state->smc_scc_num & NUM_IS_SCC) {
339 sccp = &pquicc->scc_regs[idx];
340 sccp->scc_sccm &= ~UART_SCCM_TX;
341 } else {
342 /* smcp = &cpmp->cp_smc[idx]; */
343 smcp = &pquicc->smc_regs[idx];
344 smcp->smc_smcm &= ~SMCM_TX;
345 }
346 local_irq_restore(flags);
347}
348
349
350static void rs_360_start(struct tty_struct *tty)
351{
352 ser_info_t *info = (ser_info_t *)tty->driver_data;
353 int idx;
354 unsigned long flags;
355 volatile struct scc_regs *sccp;
356 volatile struct smc_regs *smcp;
357
358 if (serial_paranoia_check(info, tty->name, "rs_stop"))
359 return;
360
361 local_irq_save(flags);
362 idx = PORT_NUM(info->state->smc_scc_num);
363 if (info->state->smc_scc_num & NUM_IS_SCC) {
364 sccp = &pquicc->scc_regs[idx];
365 sccp->scc_sccm |= UART_SCCM_TX;
366 } else {
367 smcp = &pquicc->smc_regs[idx];
368 smcp->smc_smcm |= SMCM_TX;
369 }
370 local_irq_restore(flags);
371}
372
373/*
374 * ----------------------------------------------------------------------
375 *
376 * Here starts the interrupt handling routines. All of the following
377 * subroutines are declared as inline and are folded into
378 * rs_interrupt(). They were separated out for readability's sake.
379 *
380 * Note: rs_interrupt() is a "fast" interrupt, which means that it
381 * runs with interrupts turned off. People who may want to modify
382 * rs_interrupt() should try to keep the interrupt handler as fast as
383 * possible. After you are done making modifications, it is not a bad
384 * idea to do:
385 *
386 * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
387 *
388 * and look at the resulting assemble code in serial.s.
389 *
390 * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
391 * -----------------------------------------------------------------------
392 */
393
394static _INLINE_ void receive_chars(ser_info_t *info)
395{
396 struct tty_struct *tty = info->port.tty;
397 unsigned char ch, flag, *cp;
398 /*int ignored = 0;*/
399 int i;
400 ushort status;
401 struct async_icount *icount;
402 /* struct async_icount_24 *icount; */
403 volatile QUICC_BD *bdp;
404
405 icount = &info->state->icount;
406
407 /* Just loop through the closed BDs and copy the characters into
408 * the buffer.
409 */
410 bdp = info->rx_cur;
411 for (;;) {
412 if (bdp->status & BD_SC_EMPTY) /* If this one is empty */
413 break; /* we are all done */
414
415 /* The read status mask tell us what we should do with
416 * incoming characters, especially if errors occur.
417 * One special case is the use of BD_SC_EMPTY. If
418 * this is not set, we are supposed to be ignoring
419 * inputs. In this case, just mark the buffer empty and
420 * continue.
421 */
422 if (!(info->read_status_mask & BD_SC_EMPTY)) {
423 bdp->status |= BD_SC_EMPTY;
424 bdp->status &=
425 ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
426
427 if (bdp->status & BD_SC_WRAP)
428 bdp = info->rx_bd_base;
429 else
430 bdp++;
431 continue;
432 }
433
434 /* Get the number of characters and the buffer pointer.
435 */
436 i = bdp->length;
437 /* cp = (unsigned char *)__va(bdp->buf); */
438 cp = (char *)bdp->buf;
439 status = bdp->status;
440
441 while (i-- > 0) {
442 ch = *cp++;
443 icount->rx++;
444
445#ifdef SERIAL_DEBUG_INTR
446 printk("DR%02x:%02x...", ch, status);
447#endif
448 flag = TTY_NORMAL;
449
450 if (status & (BD_SC_BR | BD_SC_FR |
451 BD_SC_PR | BD_SC_OV)) {
452 /*
453 * For statistics only
454 */
455 if (status & BD_SC_BR)
456 icount->brk++;
457 else if (status & BD_SC_PR)
458 icount->parity++;
459 else if (status & BD_SC_FR)
460 icount->frame++;
461 if (status & BD_SC_OV)
462 icount->overrun++;
463
464 /*
465 * Now check to see if character should be
466 * ignored, and mask off conditions which
467 * should be ignored.
468 if (status & info->ignore_status_mask) {
469 if (++ignored > 100)
470 break;
471 continue;
472 }
473 */
474 status &= info->read_status_mask;
475
476 if (status & (BD_SC_BR)) {
477#ifdef SERIAL_DEBUG_INTR
478 printk("handling break....");
479#endif
480 *tty->flip.flag_buf_ptr = TTY_BREAK;
481 if (info->flags & ASYNC_SAK)
482 do_SAK(tty);
483 } else if (status & BD_SC_PR)
484 flag = TTY_PARITY;
485 else if (status & BD_SC_FR)
486 flag = TTY_FRAME;
487 }
488 tty_insert_flip_char(tty, ch, flag);
489 if (status & BD_SC_OV)
490 /*
491 * Overrun is special, since it's
492 * reported immediately, and doesn't
493 * affect the current character
494 */
495 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
496 }
497
498 /* This BD is ready to be used again. Clear status.
499 * Get next BD.
500 */
501 bdp->status |= BD_SC_EMPTY;
502 bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
503
504 if (bdp->status & BD_SC_WRAP)
505 bdp = info->rx_bd_base;
506 else
507 bdp++;
508 }
509
510 info->rx_cur = (QUICC_BD *)bdp;
511
512 tty_schedule_flip(tty);
513}
514
515static _INLINE_ void receive_break(ser_info_t *info)
516{
517 struct tty_struct *tty = info->port.tty;
518
519 info->state->icount.brk++;
520 /* Check to see if there is room in the tty buffer for
521 * the break. If not, we exit now, losing the break. FIXME
522 */
523 tty_insert_flip_char(tty, 0, TTY_BREAK);
524 tty_schedule_flip(tty);
525}
526
527static _INLINE_ void transmit_chars(ser_info_t *info)
528{
529
530 if ((info->flags & TX_WAKEUP) ||
531 (info->port.tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) {
532 schedule_work(&info->tqueue);
533 }
534
535#ifdef SERIAL_DEBUG_INTR
536 printk("THRE...");
537#endif
538}
539
540#ifdef notdef
541 /* I need to do this for the SCCs, so it is left as a reminder.
542 */
543static _INLINE_ void check_modem_status(struct async_struct *info)
544{
545 int status;
546 /* struct async_icount *icount; */
547 struct async_icount_24 *icount;
548
549 status = serial_in(info, UART_MSR);
550
551 if (status & UART_MSR_ANY_DELTA) {
552 icount = &info->state->icount;
553 /* update input line counters */
554 if (status & UART_MSR_TERI)
555 icount->rng++;
556 if (status & UART_MSR_DDSR)
557 icount->dsr++;
558 if (status & UART_MSR_DDCD) {
559 icount->dcd++;
560#ifdef CONFIG_HARD_PPS
561 if ((info->flags & ASYNC_HARDPPS_CD) &&
562 (status & UART_MSR_DCD))
563 hardpps();
564#endif
565 }
566 if (status & UART_MSR_DCTS)
567 icount->cts++;
568 wake_up_interruptible(&info->delta_msr_wait);
569 }
570
571 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
572#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
573 printk("ttys%d CD now %s...", info->line,
574 (status & UART_MSR_DCD) ? "on" : "off");
575#endif
576 if (status & UART_MSR_DCD)
577 wake_up_interruptible(&info->open_wait);
578 else {
579#ifdef SERIAL_DEBUG_OPEN
580 printk("scheduling hangup...");
581#endif
582 queue_task(&info->tqueue_hangup,
583 &tq_scheduler);
584 }
585 }
586 if (info->flags & ASYNC_CTS_FLOW) {
587 if (info->port.tty->hw_stopped) {
588 if (status & UART_MSR_CTS) {
589#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
590 printk("CTS tx start...");
591#endif
592 info->port.tty->hw_stopped = 0;
593 info->IER |= UART_IER_THRI;
594 serial_out(info, UART_IER, info->IER);
595 rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
596 return;
597 }
598 } else {
599 if (!(status & UART_MSR_CTS)) {
600#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
601 printk("CTS tx stop...");
602#endif
603 info->port.tty->hw_stopped = 1;
604 info->IER &= ~UART_IER_THRI;
605 serial_out(info, UART_IER, info->IER);
606 }
607 }
608 }
609}
610#endif
611
612/*
613 * This is the serial driver's interrupt routine for a single port
614 */
615/* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */
616static void rs_360_interrupt(int vec, void *dev_id)
617{
618 u_char events;
619 int idx;
620 ser_info_t *info;
621 volatile struct smc_regs *smcp;
622 volatile struct scc_regs *sccp;
623
624 info = dev_id;
625
626 idx = PORT_NUM(info->state->smc_scc_num);
627 if (info->state->smc_scc_num & NUM_IS_SCC) {
628 sccp = &pquicc->scc_regs[idx];
629 events = sccp->scc_scce;
630 if (events & SCCM_RX)
631 receive_chars(info);
632 if (events & SCCM_TX)
633 transmit_chars(info);
634 sccp->scc_scce = events;
635 } else {
636 smcp = &pquicc->smc_regs[idx];
637 events = smcp->smc_smce;
638 if (events & SMCM_BRKE)
639 receive_break(info);
640 if (events & SMCM_RX)
641 receive_chars(info);
642 if (events & SMCM_TX)
643 transmit_chars(info);
644 smcp->smc_smce = events;
645 }
646
647#ifdef SERIAL_DEBUG_INTR
648 printk("rs_interrupt_single(%d, %x)...",
649 info->state->smc_scc_num, events);
650#endif
651#ifdef modem_control
652 check_modem_status(info);
653#endif
654 info->last_active = jiffies;
655#ifdef SERIAL_DEBUG_INTR
656 printk("end.\n");
657#endif
658}
659
660
661/*
662 * -------------------------------------------------------------------
663 * Here ends the serial interrupt routines.
664 * -------------------------------------------------------------------
665 */
666
667
668static void do_softint(void *private_)
669{
670 ser_info_t *info = (ser_info_t *) private_;
671 struct tty_struct *tty;
672
673 tty = info->port.tty;
674 if (!tty)
675 return;
676
677 if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
678 tty_wakeup(tty);
679}
680
681
682/*
683 * This routine is called from the scheduler tqueue when the interrupt
684 * routine has signalled that a hangup has occurred. The path of
685 * hangup processing is:
686 *
687 * serial interrupt routine -> (scheduler tqueue) ->
688 * do_serial_hangup() -> tty->hangup() -> rs_hangup()
689 *
690 */
691static void do_serial_hangup(void *private_)
692{
693 struct async_struct *info = (struct async_struct *) private_;
694 struct tty_struct *tty;
695
696 tty = info->port.tty;
697 if (!tty)
698 return;
699
700 tty_hangup(tty);
701}
702
703
704static int startup(ser_info_t *info)
705{
706 unsigned long flags;
707 int retval=0;
708 int idx;
709 /*struct serial_state *state = info->state;*/
710 volatile struct smc_regs *smcp;
711 volatile struct scc_regs *sccp;
712 volatile struct smc_uart_pram *up;
713 volatile struct uart_pram *scup;
714
715
716 local_irq_save(flags);
717
718 if (info->flags & ASYNC_INITIALIZED) {
719 goto errout;
720 }
721
722#ifdef maybe
723 if (!state->port || !state->type) {
724 if (info->port.tty)
725 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
726 goto errout;
727 }
728#endif
729
730#ifdef SERIAL_DEBUG_OPEN
731 printk("starting up ttys%d (irq %d)...", info->line, state->irq);
732#endif
733
734
735#ifdef modem_control
736 info->MCR = 0;
737 if (info->port.tty->termios->c_cflag & CBAUD)
738 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
739#endif
740
741 if (info->port.tty)
742 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
743
744 /*
745 * and set the speed of the serial port
746 */
747 change_speed(info);
748
749 idx = PORT_NUM(info->state->smc_scc_num);
750 if (info->state->smc_scc_num & NUM_IS_SCC) {
751 sccp = &pquicc->scc_regs[idx];
752 scup = &pquicc->pram[info->state->port].scc.pscc.u;
753
754 scup->mrblr = RX_BUF_SIZE;
755 scup->max_idl = RX_BUF_SIZE;
756
757 sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
758 sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
759
760 } else {
761 smcp = &pquicc->smc_regs[idx];
762
763 /* Enable interrupts and I/O.
764 */
765 smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
766 smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
767
768 /* We can tune the buffer length and idle characters
769 * to take advantage of the entire incoming buffer size.
770 * If mrblr is something other than 1, maxidl has to be
771 * non-zero or we never get an interrupt. The maxidl
772 * is the number of character times we wait after reception
773 * of the last character before we decide no more characters
774 * are coming.
775 */
776 /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */
777 /* holy unionized structures, Batman: */
778 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
779
780 up->mrblr = RX_BUF_SIZE;
781 up->max_idl = RX_BUF_SIZE;
782
783 up->brkcr = 1; /* number of break chars */
784 }
785
786 info->flags |= ASYNC_INITIALIZED;
787 local_irq_restore(flags);
788 return 0;
789
790errout:
791 local_irq_restore(flags);
792 return retval;
793}
794
795/*
796 * This routine will shutdown a serial port; interrupts are disabled, and
797 * DTR is dropped if the hangup on close termio flag is on.
798 */
799static void shutdown(ser_info_t *info)
800{
801 unsigned long flags;
802 struct serial_state *state;
803 int idx;
804 volatile struct smc_regs *smcp;
805 volatile struct scc_regs *sccp;
806
807 if (!(info->flags & ASYNC_INITIALIZED))
808 return;
809
810 state = info->state;
811
812#ifdef SERIAL_DEBUG_OPEN
813 printk("Shutting down serial port %d (irq %d)....", info->line,
814 state->irq);
815#endif
816
817 local_irq_save(flags);
818
819 idx = PORT_NUM(state->smc_scc_num);
820 if (state->smc_scc_num & NUM_IS_SCC) {
821 sccp = &pquicc->scc_regs[idx];
822 sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
823#ifdef CONFIG_SERIAL_CONSOLE
824 /* We can't disable the transmitter if this is the
825 * system console.
826 */
827 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
828#endif
829 sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
830 } else {
831 smcp = &pquicc->smc_regs[idx];
832
833 /* Disable interrupts and I/O.
834 */
835 smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
836#ifdef CONFIG_SERIAL_CONSOLE
837 /* We can't disable the transmitter if this is the
838 * system console.
839 */
840 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
841#endif
842 smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
843 }
844
845 if (info->port.tty)
846 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
847
848 info->flags &= ~ASYNC_INITIALIZED;
849 local_irq_restore(flags);
850}
851
852/*
853 * This routine is called to set the UART divisor registers to match
854 * the specified baud rate for a serial port.
855 */
856static void change_speed(ser_info_t *info)
857{
858 int baud_rate;
859 unsigned cflag, cval, scval, prev_mode;
860 int i, bits, sbits, idx;
861 unsigned long flags;
862 struct serial_state *state;
863 volatile struct smc_regs *smcp;
864 volatile struct scc_regs *sccp;
865
866 if (!info->port.tty || !info->port.tty->termios)
867 return;
868 cflag = info->port.tty->termios->c_cflag;
869
870 state = info->state;
871
872 /* Character length programmed into the mode register is the
873 * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
874 * 1 or 2 stop bits, minus 1.
875 * The value 'bits' counts this for us.
876 */
877 cval = 0;
878 scval = 0;
879
880 /* byte size and parity */
881 switch (cflag & CSIZE) {
882 case CS5: bits = 5; break;
883 case CS6: bits = 6; break;
884 case CS7: bits = 7; break;
885 case CS8: bits = 8; break;
886 /* Never happens, but GCC is too dumb to figure it out */
887 default: bits = 8; break;
888 }
889 sbits = bits - 5;
890
891 if (cflag & CSTOPB) {
892 cval |= SMCMR_SL; /* Two stops */
893 scval |= SCU_PMSR_SL;
894 bits++;
895 }
896 if (cflag & PARENB) {
897 cval |= SMCMR_PEN;
898 scval |= SCU_PMSR_PEN;
899 bits++;
900 }
901 if (!(cflag & PARODD)) {
902 cval |= SMCMR_PM_EVEN;
903 scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
904 }
905
906 /* Determine divisor based on baud rate */
907 i = cflag & CBAUD;
908 if (i >= (sizeof(baud_table)/sizeof(int)))
909 baud_rate = 9600;
910 else
911 baud_rate = baud_table[i];
912
913 info->timeout = (TX_BUF_SIZE*HZ*bits);
914 info->timeout += HZ/50; /* Add .02 seconds of slop */
915
916#ifdef modem_control
917 /* CTS flow control flag and modem status interrupts */
918 info->IER &= ~UART_IER_MSI;
919 if (info->flags & ASYNC_HARDPPS_CD)
920 info->IER |= UART_IER_MSI;
921 if (cflag & CRTSCTS) {
922 info->flags |= ASYNC_CTS_FLOW;
923 info->IER |= UART_IER_MSI;
924 } else
925 info->flags &= ~ASYNC_CTS_FLOW;
926 if (cflag & CLOCAL)
927 info->flags &= ~ASYNC_CHECK_CD;
928 else {
929 info->flags |= ASYNC_CHECK_CD;
930 info->IER |= UART_IER_MSI;
931 }
932 serial_out(info, UART_IER, info->IER);
933#endif
934
935 /*
936 * Set up parity check flag
937 */
938 info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
939 if (I_INPCK(info->port.tty))
940 info->read_status_mask |= BD_SC_FR | BD_SC_PR;
941 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
942 info->read_status_mask |= BD_SC_BR;
943
944 /*
945 * Characters to ignore
946 */
947 info->ignore_status_mask = 0;
948 if (I_IGNPAR(info->port.tty))
949 info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
950 if (I_IGNBRK(info->port.tty)) {
951 info->ignore_status_mask |= BD_SC_BR;
952 /*
953 * If we're ignore parity and break indicators, ignore
954 * overruns too. (For real raw support).
955 */
956 if (I_IGNPAR(info->port.tty))
957 info->ignore_status_mask |= BD_SC_OV;
958 }
959 /*
960 * !!! ignore all characters if CREAD is not set
961 */
962 if ((cflag & CREAD) == 0)
963 info->read_status_mask &= ~BD_SC_EMPTY;
964 local_irq_save(flags);
965
966 /* Start bit has not been added (so don't, because we would just
967 * subtract it later), and we need to add one for the number of
968 * stops bits (there is always at least one).
969 */
970 bits++;
971 idx = PORT_NUM(state->smc_scc_num);
972 if (state->smc_scc_num & NUM_IS_SCC) {
973 sccp = &pquicc->scc_regs[idx];
974 sccp->scc_psmr = (sbits << 12) | scval;
975 } else {
976 smcp = &pquicc->smc_regs[idx];
977
978 /* Set the mode register. We want to keep a copy of the
979 * enables, because we want to put them back if they were
980 * present.
981 */
982 prev_mode = smcp->smc_smcmr;
983 smcp->smc_smcmr = smcr_mk_clen(bits) | cval | SMCMR_SM_UART;
984 smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN));
985 }
986
987 m360_cpm_setbrg((state - rs_table), baud_rate);
988
989 local_irq_restore(flags);
990}
991
992static void rs_360_put_char(struct tty_struct *tty, unsigned char ch)
993{
994 ser_info_t *info = (ser_info_t *)tty->driver_data;
995 volatile QUICC_BD *bdp;
996
997 if (serial_paranoia_check(info, tty->name, "rs_put_char"))
998 return 0;
999
1000 if (!tty)
1001 return 0;
1002
1003 bdp = info->tx_cur;
1004 while (bdp->status & BD_SC_READY);
1005
1006 /* *((char *)__va(bdp->buf)) = ch; */
1007 *((char *)bdp->buf) = ch;
1008 bdp->length = 1;
1009 bdp->status |= BD_SC_READY;
1010
1011 /* Get next BD.
1012 */
1013 if (bdp->status & BD_SC_WRAP)
1014 bdp = info->tx_bd_base;
1015 else
1016 bdp++;
1017
1018 info->tx_cur = (QUICC_BD *)bdp;
1019 return 1;
1020
1021}
1022
1023static int rs_360_write(struct tty_struct * tty,
1024 const unsigned char *buf, int count)
1025{
1026 int c, ret = 0;
1027 ser_info_t *info = (ser_info_t *)tty->driver_data;
1028 volatile QUICC_BD *bdp;
1029
1030#ifdef CONFIG_KGDB
1031 /* Try to let stub handle output. Returns true if it did. */
1032 if (kgdb_output_string(buf, count))
1033 return ret;
1034#endif
1035
1036 if (serial_paranoia_check(info, tty->name, "rs_write"))
1037 return 0;
1038
1039 if (!tty)
1040 return 0;
1041
1042 bdp = info->tx_cur;
1043
1044 while (1) {
1045 c = min(count, TX_BUF_SIZE);
1046
1047 if (c <= 0)
1048 break;
1049
1050 if (bdp->status & BD_SC_READY) {
1051 info->flags |= TX_WAKEUP;
1052 break;
1053 }
1054
1055 /* memcpy(__va(bdp->buf), buf, c); */
1056 memcpy((void *)bdp->buf, buf, c);
1057
1058 bdp->length = c;
1059 bdp->status |= BD_SC_READY;
1060
1061 buf += c;
1062 count -= c;
1063 ret += c;
1064
1065 /* Get next BD.
1066 */
1067 if (bdp->status & BD_SC_WRAP)
1068 bdp = info->tx_bd_base;
1069 else
1070 bdp++;
1071 info->tx_cur = (QUICC_BD *)bdp;
1072 }
1073 return ret;
1074}
1075
1076static int rs_360_write_room(struct tty_struct *tty)
1077{
1078 ser_info_t *info = (ser_info_t *)tty->driver_data;
1079 int ret;
1080
1081 if (serial_paranoia_check(info, tty->name, "rs_write_room"))
1082 return 0;
1083
1084 if ((info->tx_cur->status & BD_SC_READY) == 0) {
1085 info->flags &= ~TX_WAKEUP;
1086 ret = TX_BUF_SIZE;
1087 }
1088 else {
1089 info->flags |= TX_WAKEUP;
1090 ret = 0;
1091 }
1092 return ret;
1093}
1094
1095/* I could track this with transmit counters....maybe later.
1096*/
1097static int rs_360_chars_in_buffer(struct tty_struct *tty)
1098{
1099 ser_info_t *info = (ser_info_t *)tty->driver_data;
1100
1101 if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
1102 return 0;
1103 return 0;
1104}
1105
1106static void rs_360_flush_buffer(struct tty_struct *tty)
1107{
1108 ser_info_t *info = (ser_info_t *)tty->driver_data;
1109
1110 if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
1111 return;
1112
1113 /* There is nothing to "flush", whatever we gave the CPM
1114 * is on its way out.
1115 */
1116 tty_wakeup(tty);
1117 info->flags &= ~TX_WAKEUP;
1118}
1119
1120/*
1121 * This function is used to send a high-priority XON/XOFF character to
1122 * the device
1123 */
1124static void rs_360_send_xchar(struct tty_struct *tty, char ch)
1125{
1126 volatile QUICC_BD *bdp;
1127
1128 ser_info_t *info = (ser_info_t *)tty->driver_data;
1129
1130 if (serial_paranoia_check(info, tty->name, "rs_send_char"))
1131 return;
1132
1133 bdp = info->tx_cur;
1134 while (bdp->status & BD_SC_READY);
1135
1136 /* *((char *)__va(bdp->buf)) = ch; */
1137 *((char *)bdp->buf) = ch;
1138 bdp->length = 1;
1139 bdp->status |= BD_SC_READY;
1140
1141 /* Get next BD.
1142 */
1143 if (bdp->status & BD_SC_WRAP)
1144 bdp = info->tx_bd_base;
1145 else
1146 bdp++;
1147
1148 info->tx_cur = (QUICC_BD *)bdp;
1149}
1150
1151/*
1152 * ------------------------------------------------------------
1153 * rs_throttle()
1154 *
1155 * This routine is called by the upper-layer tty layer to signal that
1156 * incoming characters should be throttled.
1157 * ------------------------------------------------------------
1158 */
1159static void rs_360_throttle(struct tty_struct * tty)
1160{
1161 ser_info_t *info = (ser_info_t *)tty->driver_data;
1162#ifdef SERIAL_DEBUG_THROTTLE
1163 char buf[64];
1164
1165 printk("throttle %s: %d....\n", _tty_name(tty, buf),
1166 tty->ldisc.chars_in_buffer(tty));
1167#endif
1168
1169 if (serial_paranoia_check(info, tty->name, "rs_throttle"))
1170 return;
1171
1172 if (I_IXOFF(tty))
1173 rs_360_send_xchar(tty, STOP_CHAR(tty));
1174
1175#ifdef modem_control
1176 if (tty->termios->c_cflag & CRTSCTS)
1177 info->MCR &= ~UART_MCR_RTS;
1178
1179 local_irq_disable();
1180 serial_out(info, UART_MCR, info->MCR);
1181 local_irq_enable();
1182#endif
1183}
1184
1185static void rs_360_unthrottle(struct tty_struct * tty)
1186{
1187 ser_info_t *info = (ser_info_t *)tty->driver_data;
1188#ifdef SERIAL_DEBUG_THROTTLE
1189 char buf[64];
1190
1191 printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
1192 tty->ldisc.chars_in_buffer(tty));
1193#endif
1194
1195 if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1196 return;
1197
1198 if (I_IXOFF(tty)) {
1199 if (info->x_char)
1200 info->x_char = 0;
1201 else
1202 rs_360_send_xchar(tty, START_CHAR(tty));
1203 }
1204#ifdef modem_control
1205 if (tty->termios->c_cflag & CRTSCTS)
1206 info->MCR |= UART_MCR_RTS;
1207 local_irq_disable();
1208 serial_out(info, UART_MCR, info->MCR);
1209 local_irq_enable();
1210#endif
1211}
1212
1213/*
1214 * ------------------------------------------------------------
1215 * rs_ioctl() and friends
1216 * ------------------------------------------------------------
1217 */
1218
1219#ifdef maybe
1220/*
1221 * get_lsr_info - get line status register info
1222 *
1223 * Purpose: Let user call ioctl() to get info when the UART physically
1224 * is emptied. On bus types like RS485, the transmitter must
1225 * release the bus after transmitting. This must be done when
1226 * the transmit shift register is empty, not be done when the
1227 * transmit holding register is empty. This functionality
1228 * allows an RS485 driver to be written in user space.
1229 */
1230static int get_lsr_info(struct async_struct * info, unsigned int *value)
1231{
1232 unsigned char status;
1233 unsigned int result;
1234
1235 local_irq_disable();
1236 status = serial_in(info, UART_LSR);
1237 local_irq_enable();
1238 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1239 return put_user(result,value);
1240}
1241#endif
1242
1243static int rs_360_tiocmget(struct tty_struct *tty)
1244{
1245 ser_info_t *info = (ser_info_t *)tty->driver_data;
1246 unsigned int result = 0;
1247#ifdef modem_control
1248 unsigned char control, status;
1249
1250 if (serial_paranoia_check(info, tty->name, __func__))
1251 return -ENODEV;
1252
1253 if (tty->flags & (1 << TTY_IO_ERROR))
1254 return -EIO;
1255
1256 control = info->MCR;
1257 local_irq_disable();
1258 status = serial_in(info, UART_MSR);
1259 local_irq_enable();
1260 result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1261 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1262#ifdef TIOCM_OUT1
1263 | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
1264 | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
1265#endif
1266 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1267 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1268 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1269 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1270#endif
1271 return result;
1272}
1273
1274static int rs_360_tiocmset(struct tty_struct *tty,
1275 unsigned int set, unsigned int clear)
1276{
1277#ifdef modem_control
1278 ser_info_t *info = (ser_info_t *)tty->driver_data;
1279 unsigned int arg;
1280
1281 if (serial_paranoia_check(info, tty->name, __func__))
1282 return -ENODEV;
1283
1284 if (tty->flags & (1 << TTY_IO_ERROR))
1285 return -EIO;
1286 /* FIXME: locking on info->mcr */
1287 if (set & TIOCM_RTS)
1288 info->mcr |= UART_MCR_RTS;
1289 if (set & TIOCM_DTR)
1290 info->mcr |= UART_MCR_DTR;
1291 if (clear & TIOCM_RTS)
1292 info->MCR &= ~UART_MCR_RTS;
1293 if (clear & TIOCM_DTR)
1294 info->MCR &= ~UART_MCR_DTR;
1295
1296#ifdef TIOCM_OUT1
1297 if (set & TIOCM_OUT1)
1298 info->MCR |= UART_MCR_OUT1;
1299 if (set & TIOCM_OUT2)
1300 info->MCR |= UART_MCR_OUT2;
1301 if (clear & TIOCM_OUT1)
1302 info->MCR &= ~UART_MCR_OUT1;
1303 if (clear & TIOCM_OUT2)
1304 info->MCR &= ~UART_MCR_OUT2;
1305#endif
1306
1307 local_irq_disable();
1308 serial_out(info, UART_MCR, info->MCR);
1309 local_irq_enable();
1310#endif
1311 return 0;
1312}
1313
1314/* Sending a break is a two step process on the SMC/SCC. It is accomplished
1315 * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT
1316 * command. We take advantage of the begin/end functions to make this
1317 * happen.
1318 */
1319static ushort smc_chan_map[] = {
1320 CPM_CR_CH_SMC1,
1321 CPM_CR_CH_SMC2
1322};
1323
1324static ushort scc_chan_map[] = {
1325 CPM_CR_CH_SCC1,
1326 CPM_CR_CH_SCC2,
1327 CPM_CR_CH_SCC3,
1328 CPM_CR_CH_SCC4
1329};
1330
1331static void begin_break(ser_info_t *info)
1332{
1333 volatile QUICC *cp;
1334 ushort chan;
1335 int idx;
1336
1337 cp = pquicc;
1338
1339 idx = PORT_NUM(info->state->smc_scc_num);
1340 if (info->state->smc_scc_num & NUM_IS_SCC)
1341 chan = scc_chan_map[idx];
1342 else
1343 chan = smc_chan_map[idx];
1344
1345 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG;
1346 while (cp->cp_cr & CPM_CR_FLG);
1347}
1348
1349static void end_break(ser_info_t *info)
1350{
1351 volatile QUICC *cp;
1352 ushort chan;
1353 int idx;
1354
1355 cp = pquicc;
1356
1357 idx = PORT_NUM(info->state->smc_scc_num);
1358 if (info->state->smc_scc_num & NUM_IS_SCC)
1359 chan = scc_chan_map[idx];
1360 else
1361 chan = smc_chan_map[idx];
1362
1363 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG;
1364 while (cp->cp_cr & CPM_CR_FLG);
1365}
1366
1367/*
1368 * This routine sends a break character out the serial port.
1369 */
1370static void send_break(ser_info_t *info, unsigned int duration)
1371{
1372#ifdef SERIAL_DEBUG_SEND_BREAK
1373 printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
1374#endif
1375 begin_break(info);
1376 msleep_interruptible(duration);
1377 end_break(info);
1378#ifdef SERIAL_DEBUG_SEND_BREAK
1379 printk("done jiffies=%lu\n", jiffies);
1380#endif
1381}
1382
1383
1384/*
1385 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1386 * Return: write counters to the user passed counter struct
1387 * NB: both 1->0 and 0->1 transitions are counted except for
1388 * RI where only 0->1 is counted.
1389 */
1390static int rs_360_get_icount(struct tty_struct *tty,
1391 struct serial_icounter_struct *icount)
1392{
1393 ser_info_t *info = (ser_info_t *)tty->driver_data;
1394 struct async_icount cnow;
1395
1396 local_irq_disable();
1397 cnow = info->state->icount;
1398 local_irq_enable();
1399
1400 icount->cts = cnow.cts;
1401 icount->dsr = cnow.dsr;
1402 icount->rng = cnow.rng;
1403 icount->dcd = cnow.dcd;
1404
1405 return 0;
1406}
1407
1408static int rs_360_ioctl(struct tty_struct *tty,
1409 unsigned int cmd, unsigned long arg)
1410{
1411 int error;
1412 ser_info_t *info = (ser_info_t *)tty->driver_data;
1413 int retval;
1414 struct async_icount cnow;
1415 /* struct async_icount_24 cnow;*/ /* kernel counter temps */
1416 struct serial_icounter_struct *p_cuser; /* user space */
1417
1418 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1419 return -ENODEV;
1420
1421 if (cmd != TIOCMIWAIT) {
1422 if (tty->flags & (1 << TTY_IO_ERROR))
1423 return -EIO;
1424 }
1425
1426 switch (cmd) {
1427 case TCSBRK: /* SVID version: non-zero arg --> no break */
1428 retval = tty_check_change(tty);
1429 if (retval)
1430 return retval;
1431 tty_wait_until_sent(tty, 0);
1432 if (signal_pending(current))
1433 return -EINTR;
1434 if (!arg) {
1435 send_break(info, 250); /* 1/4 second */
1436 if (signal_pending(current))
1437 return -EINTR;
1438 }
1439 return 0;
1440 case TCSBRKP: /* support for POSIX tcsendbreak() */
1441 retval = tty_check_change(tty);
1442 if (retval)
1443 return retval;
1444 tty_wait_until_sent(tty, 0);
1445 if (signal_pending(current))
1446 return -EINTR;
1447 send_break(info, arg ? arg*100 : 250);
1448 if (signal_pending(current))
1449 return -EINTR;
1450 return 0;
1451 case TIOCSBRK:
1452 retval = tty_check_change(tty);
1453 if (retval)
1454 return retval;
1455 tty_wait_until_sent(tty, 0);
1456 begin_break(info);
1457 return 0;
1458 case TIOCCBRK:
1459 retval = tty_check_change(tty);
1460 if (retval)
1461 return retval;
1462 end_break(info);
1463 return 0;
1464#ifdef maybe
1465 case TIOCSERGETLSR: /* Get line status register */
1466 return get_lsr_info(info, (unsigned int *) arg);
1467#endif
1468 /*
1469 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1470 * - mask passed in arg for lines of interest
1471 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1472 * Caller should use TIOCGICOUNT to see which one it was
1473 */
1474 case TIOCMIWAIT:
1475#ifdef modem_control
1476 local_irq_disable();
1477 /* note the counters on entry */
1478 cprev = info->state->icount;
1479 local_irq_enable();
1480 while (1) {
1481 interruptible_sleep_on(&info->delta_msr_wait);
1482 /* see if a signal did it */
1483 if (signal_pending(current))
1484 return -ERESTARTSYS;
1485 local_irq_disable();
1486 cnow = info->state->icount; /* atomic copy */
1487 local_irq_enable();
1488 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1489 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1490 return -EIO; /* no change => error */
1491 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1492 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1493 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1494 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1495 return 0;
1496 }
1497 cprev = cnow;
1498 }
1499 /* NOTREACHED */
1500#else
1501 return 0;
1502#endif
1503
1504
1505 default:
1506 return -ENOIOCTLCMD;
1507 }
1508 return 0;
1509}
1510
1511/* FIX UP modem control here someday......
1512*/
1513static void rs_360_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1514{
1515 ser_info_t *info = (ser_info_t *)tty->driver_data;
1516
1517 change_speed(info);
1518
1519#ifdef modem_control
1520 /* Handle transition to B0 status */
1521 if ((old_termios->c_cflag & CBAUD) &&
1522 !(tty->termios->c_cflag & CBAUD)) {
1523 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
1524 local_irq_disable();
1525 serial_out(info, UART_MCR, info->MCR);
1526 local_irq_enable();
1527 }
1528
1529 /* Handle transition away from B0 status */
1530 if (!(old_termios->c_cflag & CBAUD) &&
1531 (tty->termios->c_cflag & CBAUD)) {
1532 info->MCR |= UART_MCR_DTR;
1533 if (!tty->hw_stopped ||
1534 !(tty->termios->c_cflag & CRTSCTS)) {
1535 info->MCR |= UART_MCR_RTS;
1536 }
1537 local_irq_disable();
1538 serial_out(info, UART_MCR, info->MCR);
1539 local_irq_enable();
1540 }
1541
1542 /* Handle turning off CRTSCTS */
1543 if ((old_termios->c_cflag & CRTSCTS) &&
1544 !(tty->termios->c_cflag & CRTSCTS)) {
1545 tty->hw_stopped = 0;
1546 rs_360_start(tty);
1547 }
1548#endif
1549
1550#if 0
1551 /*
1552 * No need to wake up processes in open wait, since they
1553 * sample the CLOCAL flag once, and don't recheck it.
1554 * XXX It's not clear whether the current behavior is correct
1555 * or not. Hence, this may change.....
1556 */
1557 if (!(old_termios->c_cflag & CLOCAL) &&
1558 (tty->termios->c_cflag & CLOCAL))
1559 wake_up_interruptible(&info->open_wait);
1560#endif
1561}
1562
1563/*
1564 * ------------------------------------------------------------
1565 * rs_close()
1566 *
1567 * This routine is called when the serial port gets closed. First, we
1568 * wait for the last remaining data to be sent. Then, we unlink its
1569 * async structure from the interrupt chain if necessary, and we free
1570 * that IRQ if nothing is left in the chain.
1571 * ------------------------------------------------------------
1572 */
1573static void rs_360_close(struct tty_struct *tty, struct file * filp)
1574{
1575 ser_info_t *info = (ser_info_t *)tty->driver_data;
1576 /* struct async_state *state; */
1577 struct serial_state *state;
1578 unsigned long flags;
1579 int idx;
1580 volatile struct smc_regs *smcp;
1581 volatile struct scc_regs *sccp;
1582
1583 if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
1584 return;
1585
1586 state = info->state;
1587
1588 local_irq_save(flags);
1589
1590 if (tty_hung_up_p(filp)) {
1591 DBG_CNT("before DEC-hung");
1592 local_irq_restore(flags);
1593 return;
1594 }
1595
1596#ifdef SERIAL_DEBUG_OPEN
1597 printk("rs_close ttys%d, count = %d\n", info->line, state->count);
1598#endif
1599 if ((tty->count == 1) && (state->count != 1)) {
1600 /*
1601 * Uh, oh. tty->count is 1, which means that the tty
1602 * structure will be freed. state->count should always
1603 * be one in these conditions. If it's greater than
1604 * one, we've got real problems, since it means the
1605 * serial port won't be shutdown.
1606 */
1607 printk("rs_close: bad serial port count; tty->count is 1, "
1608 "state->count is %d\n", state->count);
1609 state->count = 1;
1610 }
1611 if (--state->count < 0) {
1612 printk("rs_close: bad serial port count for ttys%d: %d\n",
1613 info->line, state->count);
1614 state->count = 0;
1615 }
1616 if (state->count) {
1617 DBG_CNT("before DEC-2");
1618 local_irq_restore(flags);
1619 return;
1620 }
1621 info->flags |= ASYNC_CLOSING;
1622 /*
1623 * Now we wait for the transmit buffer to clear; and we notify
1624 * the line discipline to only process XON/XOFF characters.
1625 */
1626 tty->closing = 1;
1627 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1628 tty_wait_until_sent(tty, info->closing_wait);
1629 /*
1630 * At this point we stop accepting input. To do this, we
1631 * disable the receive line status interrupts, and tell the
1632 * interrupt driver to stop checking the data ready bit in the
1633 * line status register.
1634 */
1635 info->read_status_mask &= ~BD_SC_EMPTY;
1636 if (info->flags & ASYNC_INITIALIZED) {
1637
1638 idx = PORT_NUM(info->state->smc_scc_num);
1639 if (info->state->smc_scc_num & NUM_IS_SCC) {
1640 sccp = &pquicc->scc_regs[idx];
1641 sccp->scc_sccm &= ~UART_SCCM_RX;
1642 sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR;
1643 } else {
1644 smcp = &pquicc->smc_regs[idx];
1645 smcp->smc_smcm &= ~SMCM_RX;
1646 smcp->smc_smcmr &= ~SMCMR_REN;
1647 }
1648 /*
1649 * Before we drop DTR, make sure the UART transmitter
1650 * has completely drained; this is especially
1651 * important if there is a transmit FIFO!
1652 */
1653 rs_360_wait_until_sent(tty, info->timeout);
1654 }
1655 shutdown(info);
1656 rs_360_flush_buffer(tty);
1657 tty_ldisc_flush(tty);
1658 tty->closing = 0;
1659 info->event = 0;
1660 info->port.tty = NULL;
1661 if (info->blocked_open) {
1662 if (info->close_delay) {
1663 msleep_interruptible(jiffies_to_msecs(info->close_delay));
1664 }
1665 wake_up_interruptible(&info->open_wait);
1666 }
1667 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1668 wake_up_interruptible(&info->close_wait);
1669 local_irq_restore(flags);
1670}
1671
1672/*
1673 * rs_wait_until_sent() --- wait until the transmitter is empty
1674 */
1675static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
1676{
1677 ser_info_t *info = (ser_info_t *)tty->driver_data;
1678 unsigned long orig_jiffies, char_time;
1679 /*int lsr;*/
1680 volatile QUICC_BD *bdp;
1681
1682 if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
1683 return;
1684
1685#ifdef maybe
1686 if (info->state->type == PORT_UNKNOWN)
1687 return;
1688#endif
1689
1690 orig_jiffies = jiffies;
1691 /*
1692 * Set the check interval to be 1/5 of the estimated time to
1693 * send a single character, and make it at least 1. The check
1694 * interval should also be less than the timeout.
1695 *
1696 * Note: we have to use pretty tight timings here to satisfy
1697 * the NIST-PCTS.
1698 */
1699 char_time = 1;
1700 if (timeout)
1701 char_time = min(char_time, (unsigned long)timeout);
1702#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1703 printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1704 printk("jiff=%lu...", jiffies);
1705#endif
1706
1707 /* We go through the loop at least once because we can't tell
1708 * exactly when the last character exits the shifter. There can
1709 * be at least two characters waiting to be sent after the buffers
1710 * are empty.
1711 */
1712 do {
1713#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1714 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1715#endif
1716/* current->counter = 0; make us low-priority */
1717 msleep_interruptible(jiffies_to_msecs(char_time));
1718 if (signal_pending(current))
1719 break;
1720 if (timeout && (time_after(jiffies, orig_jiffies + timeout)))
1721 break;
1722 /* The 'tx_cur' is really the next buffer to send. We
1723 * have to back up to the previous BD and wait for it
1724 * to go. This isn't perfect, because all this indicates
1725 * is the buffer is available. There are still characters
1726 * in the CPM FIFO.
1727 */
1728 bdp = info->tx_cur;
1729 if (bdp == info->tx_bd_base)
1730 bdp += (TX_NUM_FIFO-1);
1731 else
1732 bdp--;
1733 } while (bdp->status & BD_SC_READY);
1734 current->state = TASK_RUNNING;
1735#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1736 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1737#endif
1738}
1739
1740/*
1741 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
1742 */
1743static void rs_360_hangup(struct tty_struct *tty)
1744{
1745 ser_info_t *info = (ser_info_t *)tty->driver_data;
1746 struct serial_state *state = info->state;
1747
1748 if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1749 return;
1750
1751 state = info->state;
1752
1753 rs_360_flush_buffer(tty);
1754 shutdown(info);
1755 info->event = 0;
1756 state->count = 0;
1757 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1758 info->port.tty = NULL;
1759 wake_up_interruptible(&info->open_wait);
1760}
1761
1762/*
1763 * ------------------------------------------------------------
1764 * rs_open() and friends
1765 * ------------------------------------------------------------
1766 */
1767static int block_til_ready(struct tty_struct *tty, struct file * filp,
1768 ser_info_t *info)
1769{
1770#ifdef DO_THIS_LATER
1771 DECLARE_WAITQUEUE(wait, current);
1772#endif
1773 struct serial_state *state = info->state;
1774 int retval;
1775 int do_clocal = 0;
1776
1777 /*
1778 * If the device is in the middle of being closed, then block
1779 * until it's done, and then try again.
1780 */
1781 if (tty_hung_up_p(filp) ||
1782 (info->flags & ASYNC_CLOSING)) {
1783 if (info->flags & ASYNC_CLOSING)
1784 interruptible_sleep_on(&info->close_wait);
1785#ifdef SERIAL_DO_RESTART
1786 if (info->flags & ASYNC_HUP_NOTIFY)
1787 return -EAGAIN;
1788 else
1789 return -ERESTARTSYS;
1790#else
1791 return -EAGAIN;
1792#endif
1793 }
1794
1795 /*
1796 * If non-blocking mode is set, or the port is not enabled,
1797 * then make the check up front and then exit.
1798 * If this is an SMC port, we don't have modem control to wait
1799 * for, so just get out here.
1800 */
1801 if ((filp->f_flags & O_NONBLOCK) ||
1802 (tty->flags & (1 << TTY_IO_ERROR)) ||
1803 !(info->state->smc_scc_num & NUM_IS_SCC)) {
1804 info->flags |= ASYNC_NORMAL_ACTIVE;
1805 return 0;
1806 }
1807
1808 if (tty->termios->c_cflag & CLOCAL)
1809 do_clocal = 1;
1810
1811 /*
1812 * Block waiting for the carrier detect and the line to become
1813 * free (i.e., not in use by the callout). While we are in
1814 * this loop, state->count is dropped by one, so that
1815 * rs_close() knows when to free things. We restore it upon
1816 * exit, either normal or abnormal.
1817 */
1818 retval = 0;
1819#ifdef DO_THIS_LATER
1820 add_wait_queue(&info->open_wait, &wait);
1821#ifdef SERIAL_DEBUG_OPEN
1822 printk("block_til_ready before block: ttys%d, count = %d\n",
1823 state->line, state->count);
1824#endif
1825 local_irq_disable();
1826 if (!tty_hung_up_p(filp))
1827 state->count--;
1828 local_irq_enable();
1829 info->blocked_open++;
1830 while (1) {
1831 local_irq_disable();
1832 if (tty->termios->c_cflag & CBAUD)
1833 serial_out(info, UART_MCR,
1834 serial_inp(info, UART_MCR) |
1835 (UART_MCR_DTR | UART_MCR_RTS));
1836 local_irq_enable();
1837 set_current_state(TASK_INTERRUPTIBLE);
1838 if (tty_hung_up_p(filp) ||
1839 !(info->flags & ASYNC_INITIALIZED)) {
1840#ifdef SERIAL_DO_RESTART
1841 if (info->flags & ASYNC_HUP_NOTIFY)
1842 retval = -EAGAIN;
1843 else
1844 retval = -ERESTARTSYS;
1845#else
1846 retval = -EAGAIN;
1847#endif
1848 break;
1849 }
1850 if (!(info->flags & ASYNC_CLOSING) &&
1851 (do_clocal || (serial_in(info, UART_MSR) &
1852 UART_MSR_DCD)))
1853 break;
1854 if (signal_pending(current)) {
1855 retval = -ERESTARTSYS;
1856 break;
1857 }
1858#ifdef SERIAL_DEBUG_OPEN
1859 printk("block_til_ready blocking: ttys%d, count = %d\n",
1860 info->line, state->count);
1861#endif
1862 tty_unlock();
1863 schedule();
1864 tty_lock();
1865 }
1866 current->state = TASK_RUNNING;
1867 remove_wait_queue(&info->open_wait, &wait);
1868 if (!tty_hung_up_p(filp))
1869 state->count++;
1870 info->blocked_open--;
1871#ifdef SERIAL_DEBUG_OPEN
1872 printk("block_til_ready after blocking: ttys%d, count = %d\n",
1873 info->line, state->count);
1874#endif
1875#endif /* DO_THIS_LATER */
1876 if (retval)
1877 return retval;
1878 info->flags |= ASYNC_NORMAL_ACTIVE;
1879 return 0;
1880}
1881
1882static int get_async_struct(int line, ser_info_t **ret_info)
1883{
1884 struct serial_state *sstate;
1885
1886 sstate = rs_table + line;
1887 if (sstate->info) {
1888 sstate->count++;
1889 *ret_info = (ser_info_t *)sstate->info;
1890 return 0;
1891 }
1892 else {
1893 return -ENOMEM;
1894 }
1895}
1896
1897/*
1898 * This routine is called whenever a serial port is opened. It
1899 * enables interrupts for a serial port, linking in its async structure into
1900 * the IRQ chain. It also performs the serial-specific
1901 * initialization for the tty structure.
1902 */
1903static int rs_360_open(struct tty_struct *tty, struct file * filp)
1904{
1905 ser_info_t *info;
1906 int retval, line;
1907
1908 line = tty->index;
1909 if ((line < 0) || (line >= NR_PORTS))
1910 return -ENODEV;
1911 retval = get_async_struct(line, &info);
1912 if (retval)
1913 return retval;
1914 if (serial_paranoia_check(info, tty->name, "rs_open"))
1915 return -ENODEV;
1916
1917#ifdef SERIAL_DEBUG_OPEN
1918 printk("rs_open %s, count = %d\n", tty->name, info->state->count);
1919#endif
1920 tty->driver_data = info;
1921 info->port.tty = tty;
1922
1923 /*
1924 * Start up serial port
1925 */
1926 retval = startup(info);
1927 if (retval)
1928 return retval;
1929
1930 retval = block_til_ready(tty, filp, info);
1931 if (retval) {
1932#ifdef SERIAL_DEBUG_OPEN
1933 printk("rs_open returning after block_til_ready with %d\n",
1934 retval);
1935#endif
1936 return retval;
1937 }
1938
1939#ifdef SERIAL_DEBUG_OPEN
1940 printk("rs_open %s successful...", tty->name);
1941#endif
1942 return 0;
1943}
1944
1945/*
1946 * /proc fs routines....
1947 */
1948
1949static inline int line_info(char *buf, struct serial_state *state)
1950{
1951#ifdef notdef
1952 struct async_struct *info = state->info, scr_info;
1953 char stat_buf[30], control, status;
1954#endif
1955 int ret;
1956
1957 ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
1958 state->line,
1959 (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC",
1960 (unsigned int)(state->port), state->irq);
1961
1962 if (!state->port || (state->type == PORT_UNKNOWN)) {
1963 ret += sprintf(buf+ret, "\n");
1964 return ret;
1965 }
1966
1967#ifdef notdef
1968 /*
1969 * Figure out the current RS-232 lines
1970 */
1971 if (!info) {
1972 info = &scr_info; /* This is just for serial_{in,out} */
1973
1974 info->magic = SERIAL_MAGIC;
1975 info->port = state->port;
1976 info->flags = state->flags;
1977 info->quot = 0;
1978 info->port.tty = NULL;
1979 }
1980 local_irq_disable();
1981 status = serial_in(info, UART_MSR);
1982 control = info ? info->MCR : serial_in(info, UART_MCR);
1983 local_irq_enable();
1984
1985 stat_buf[0] = 0;
1986 stat_buf[1] = 0;
1987 if (control & UART_MCR_RTS)
1988 strcat(stat_buf, "|RTS");
1989 if (status & UART_MSR_CTS)
1990 strcat(stat_buf, "|CTS");
1991 if (control & UART_MCR_DTR)
1992 strcat(stat_buf, "|DTR");
1993 if (status & UART_MSR_DSR)
1994 strcat(stat_buf, "|DSR");
1995 if (status & UART_MSR_DCD)
1996 strcat(stat_buf, "|CD");
1997 if (status & UART_MSR_RI)
1998 strcat(stat_buf, "|RI");
1999
2000 if (info->quot) {
2001 ret += sprintf(buf+ret, " baud:%d",
2002 state->baud_base / info->quot);
2003 }
2004
2005 ret += sprintf(buf+ret, " tx:%d rx:%d",
2006 state->icount.tx, state->icount.rx);
2007
2008 if (state->icount.frame)
2009 ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
2010
2011 if (state->icount.parity)
2012 ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
2013
2014 if (state->icount.brk)
2015 ret += sprintf(buf+ret, " brk:%d", state->icount.brk);
2016
2017 if (state->icount.overrun)
2018 ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
2019
2020 /*
2021 * Last thing is the RS-232 status lines
2022 */
2023 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2024#endif
2025 return ret;
2026}
2027
2028int rs_360_read_proc(char *page, char **start, off_t off, int count,
2029 int *eof, void *data)
2030{
2031 int i, len = 0;
2032 off_t begin = 0;
2033
2034 len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
2035 for (i = 0; i < NR_PORTS && len < 4000; i++) {
2036 len += line_info(page + len, &rs_table[i]);
2037 if (len+begin > off+count)
2038 goto done;
2039 if (len+begin < off) {
2040 begin += len;
2041 len = 0;
2042 }
2043 }
2044 *eof = 1;
2045done:
2046 if (off >= len+begin)
2047 return 0;
2048 *start = page + (begin-off);
2049 return ((count < begin+len-off) ? count : begin+len-off);
2050}
2051
2052/*
2053 * ---------------------------------------------------------------------
2054 * rs_init() and friends
2055 *
2056 * rs_init() is called at boot-time to initialize the serial driver.
2057 * ---------------------------------------------------------------------
2058 */
2059
2060/*
2061 * This routine prints out the appropriate serial driver version
2062 * number, and identifies which options were configured into this
2063 * driver.
2064 */
2065static _INLINE_ void show_serial_version(void)
2066{
2067 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
2068}
2069
2070
2071/*
2072 * The serial console driver used during boot. Note that these names
2073 * clash with those found in "serial.c", so we currently can't support
2074 * the 16xxx uarts and these at the same time. I will fix this to become
2075 * an indirect function call from tty_io.c (or something).
2076 */
2077
2078#ifdef CONFIG_SERIAL_CONSOLE
2079
2080/*
2081 * Print a string to the serial port trying not to disturb any possible
2082 * real use of the port...
2083 */
2084static void my_console_write(int idx, const char *s,
2085 unsigned count)
2086{
2087 struct serial_state *ser;
2088 ser_info_t *info;
2089 unsigned i;
2090 QUICC_BD *bdp, *bdbase;
2091 volatile struct smc_uart_pram *up;
2092 volatile u_char *cp;
2093
2094 ser = rs_table + idx;
2095
2096
2097 /* If the port has been initialized for general use, we have
2098 * to use the buffer descriptors allocated there. Otherwise,
2099 * we simply use the single buffer allocated.
2100 */
2101 if ((info = (ser_info_t *)ser->info) != NULL) {
2102 bdp = info->tx_cur;
2103 bdbase = info->tx_bd_base;
2104 }
2105 else {
2106 /* Pointer to UART in parameter ram.
2107 */
2108 /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2109 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2110
2111 /* Get the address of the host memory buffer.
2112 */
2113 bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2114 }
2115
2116 /*
2117 * We need to gracefully shut down the transmitter, disable
2118 * interrupts, then send our bytes out.
2119 */
2120
2121 /*
2122 * Now, do each character. This is not as bad as it looks
2123 * since this is a holding FIFO and not a transmitting FIFO.
2124 * We could add the complexity of filling the entire transmit
2125 * buffer, but we would just wait longer between accesses......
2126 */
2127 for (i = 0; i < count; i++, s++) {
2128 /* Wait for transmitter fifo to empty.
2129 * Ready indicates output is ready, and xmt is doing
2130 * that, not that it is ready for us to send.
2131 */
2132 while (bdp->status & BD_SC_READY);
2133
2134 /* Send the character out.
2135 */
2136 cp = bdp->buf;
2137 *cp = *s;
2138
2139 bdp->length = 1;
2140 bdp->status |= BD_SC_READY;
2141
2142 if (bdp->status & BD_SC_WRAP)
2143 bdp = bdbase;
2144 else
2145 bdp++;
2146
2147 /* if a LF, also do CR... */
2148 if (*s == 10) {
2149 while (bdp->status & BD_SC_READY);
2150 /* cp = __va(bdp->buf); */
2151 cp = bdp->buf;
2152 *cp = 13;
2153 bdp->length = 1;
2154 bdp->status |= BD_SC_READY;
2155
2156 if (bdp->status & BD_SC_WRAP) {
2157 bdp = bdbase;
2158 }
2159 else {
2160 bdp++;
2161 }
2162 }
2163 }
2164
2165 /*
2166 * Finally, Wait for transmitter & holding register to empty
2167 * and restore the IER
2168 */
2169 while (bdp->status & BD_SC_READY);
2170
2171 if (info)
2172 info->tx_cur = (QUICC_BD *)bdp;
2173}
2174
2175static void serial_console_write(struct console *c, const char *s,
2176 unsigned count)
2177{
2178#ifdef CONFIG_KGDB
2179 /* Try to let stub handle output. Returns true if it did. */
2180 if (kgdb_output_string(s, count))
2181 return;
2182#endif
2183 my_console_write(c->index, s, count);
2184}
2185
2186
2187
2188/*void console_print_68360(const char *p)
2189{
2190 const char *cp = p;
2191 int i;
2192
2193 for (i=0;cp[i]!=0;i++);
2194
2195 serial_console_write (p, i);
2196
2197 //Comment this if you want to have a strict interrupt-driven output
2198 //rs_fair_output();
2199
2200 return;
2201}*/
2202
2203
2204
2205
2206
2207
2208#ifdef CONFIG_XMON
2209int
2210xmon_360_write(const char *s, unsigned count)
2211{
2212 my_console_write(0, s, count);
2213 return(count);
2214}
2215#endif
2216
2217#ifdef CONFIG_KGDB
2218void
2219putDebugChar(char ch)
2220{
2221 my_console_write(0, &ch, 1);
2222}
2223#endif
2224
2225/*
2226 * Receive character from the serial port. This only works well
2227 * before the port is initialized for real use.
2228 */
2229static int my_console_wait_key(int idx, int xmon, char *obuf)
2230{
2231 struct serial_state *ser;
2232 u_char c, *cp;
2233 ser_info_t *info;
2234 QUICC_BD *bdp;
2235 volatile struct smc_uart_pram *up;
2236 int i;
2237
2238 ser = rs_table + idx;
2239
2240 /* Get the address of the host memory buffer.
2241 * If the port has been initialized for general use, we must
2242 * use information from the port structure.
2243 */
2244 if ((info = (ser_info_t *)ser->info))
2245 bdp = info->rx_cur;
2246 else
2247 /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */
2248 bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2249
2250 /* Pointer to UART in parameter ram.
2251 */
2252 /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2253 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2254
2255 /*
2256 * We need to gracefully shut down the receiver, disable
2257 * interrupts, then read the input.
2258 * XMON just wants a poll. If no character, return -1, else
2259 * return the character.
2260 */
2261 if (!xmon) {
2262 while (bdp->status & BD_SC_EMPTY);
2263 }
2264 else {
2265 if (bdp->status & BD_SC_EMPTY)
2266 return -1;
2267 }
2268
2269 cp = (char *)bdp->buf;
2270
2271 if (obuf) {
2272 i = c = bdp->length;
2273 while (i-- > 0)
2274 *obuf++ = *cp++;
2275 }
2276 else {
2277 c = *cp;
2278 }
2279 bdp->status |= BD_SC_EMPTY;
2280
2281 if (info) {
2282 if (bdp->status & BD_SC_WRAP) {
2283 bdp = info->rx_bd_base;
2284 }
2285 else {
2286 bdp++;
2287 }
2288 info->rx_cur = (QUICC_BD *)bdp;
2289 }
2290
2291 return((int)c);
2292}
2293
2294static int serial_console_wait_key(struct console *co)
2295{
2296 return(my_console_wait_key(co->index, 0, NULL));
2297}
2298
2299#ifdef CONFIG_XMON
2300int
2301xmon_360_read_poll(void)
2302{
2303 return(my_console_wait_key(0, 1, NULL));
2304}
2305
2306int
2307xmon_360_read_char(void)
2308{
2309 return(my_console_wait_key(0, 0, NULL));
2310}
2311#endif
2312
2313#ifdef CONFIG_KGDB
2314static char kgdb_buf[RX_BUF_SIZE], *kgdp;
2315static int kgdb_chars;
2316
2317unsigned char
2318getDebugChar(void)
2319{
2320 if (kgdb_chars <= 0) {
2321 kgdb_chars = my_console_wait_key(0, 0, kgdb_buf);
2322 kgdp = kgdb_buf;
2323 }
2324 kgdb_chars--;
2325
2326 return(*kgdp++);
2327}
2328
2329void kgdb_interruptible(int state)
2330{
2331}
2332void kgdb_map_scc(void)
2333{
2334 struct serial_state *ser;
2335 uint mem_addr;
2336 volatile QUICC_BD *bdp;
2337 volatile smc_uart_t *up;
2338
2339 cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
2340
2341 /* To avoid data cache CPM DMA coherency problems, allocate a
2342 * buffer in the CPM DPRAM. This will work until the CPM and
2343 * serial ports are initialized. At that time a memory buffer
2344 * will be allocated.
2345 * The port is already initialized from the boot procedure, all
2346 * we do here is give it a different buffer and make it a FIFO.
2347 */
2348
2349 ser = rs_table;
2350
2351 /* Right now, assume we are using SMCs.
2352 */
2353 up = (smc_uart_t *)&cpmp->cp_dparam[ser->port];
2354
2355 /* Allocate space for an input FIFO, plus a few bytes for output.
2356 * Allocate bytes to maintain word alignment.
2357 */
2358 mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]);
2359
2360 /* Set the physical address of the host memory buffers in
2361 * the buffer descriptors.
2362 */
2363 bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase];
2364 bdp->buf = mem_addr;
2365
2366 bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase];
2367 bdp->buf = mem_addr+RX_BUF_SIZE;
2368
2369 up->smc_mrblr = RX_BUF_SIZE; /* receive buffer length */
2370 up->smc_maxidl = RX_BUF_SIZE;
2371}
2372#endif
2373
2374static struct tty_struct *serial_console_device(struct console *c, int *index)
2375{
2376 *index = c->index;
2377 return serial_driver;
2378}
2379
2380
2381struct console sercons = {
2382 .name = "ttyS",
2383 .write = serial_console_write,
2384 .device = serial_console_device,
2385 .wait_key = serial_console_wait_key,
2386 .setup = serial_console_setup,
2387 .flags = CON_PRINTBUFFER,
2388 .index = CONFIG_SERIAL_CONSOLE_PORT,
2389};
2390
2391
2392
2393/*
2394 * Register console.
2395 */
2396long console_360_init(long kmem_start, long kmem_end)
2397{
2398 register_console(&sercons);
2399 /*register_console (console_print_68360); - 2.0.38 only required a write
2400 function pointer. */
2401 return kmem_start;
2402}
2403
2404#endif
2405
2406/* Index in baud rate table of the default console baud rate.
2407*/
2408static int baud_idx;
2409
2410static const struct tty_operations rs_360_ops = {
2411 .owner = THIS_MODULE,
2412 .open = rs_360_open,
2413 .close = rs_360_close,
2414 .write = rs_360_write,
2415 .put_char = rs_360_put_char,
2416 .write_room = rs_360_write_room,
2417 .chars_in_buffer = rs_360_chars_in_buffer,
2418 .flush_buffer = rs_360_flush_buffer,
2419 .ioctl = rs_360_ioctl,
2420 .throttle = rs_360_throttle,
2421 .unthrottle = rs_360_unthrottle,
2422 /* .send_xchar = rs_360_send_xchar, */
2423 .set_termios = rs_360_set_termios,
2424 .stop = rs_360_stop,
2425 .start = rs_360_start,
2426 .hangup = rs_360_hangup,
2427 /* .wait_until_sent = rs_360_wait_until_sent, */
2428 /* .read_proc = rs_360_read_proc, */
2429 .tiocmget = rs_360_tiocmget,
2430 .tiocmset = rs_360_tiocmset,
2431 .get_icount = rs_360_get_icount,
2432};
2433
2434static int __init rs_360_init(void)
2435{
2436 struct serial_state * state;
2437 ser_info_t *info;
2438 void *mem_addr;
2439 uint dp_addr, iobits;
2440 int i, j, idx;
2441 ushort chan;
2442 QUICC_BD *bdp;
2443 volatile QUICC *cp;
2444 volatile struct smc_regs *sp;
2445 volatile struct smc_uart_pram *up;
2446 volatile struct scc_regs *scp;
2447 volatile struct uart_pram *sup;
2448 /* volatile immap_t *immap; */
2449
2450 serial_driver = alloc_tty_driver(NR_PORTS);
2451 if (!serial_driver)
2452 return -1;
2453
2454 show_serial_version();
2455
2456 serial_driver->name = "ttyS";
2457 serial_driver->major = TTY_MAJOR;
2458 serial_driver->minor_start = 64;
2459 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2460 serial_driver->subtype = SERIAL_TYPE_NORMAL;
2461 serial_driver->init_termios = tty_std_termios;
2462 serial_driver->init_termios.c_cflag =
2463 baud_idx | CS8 | CREAD | HUPCL | CLOCAL;
2464 serial_driver->flags = TTY_DRIVER_REAL_RAW;
2465 tty_set_operations(serial_driver, &rs_360_ops);
2466
2467 if (tty_register_driver(serial_driver))
2468 panic("Couldn't register serial driver\n");
2469
2470 cp = pquicc; /* Get pointer to Communication Processor */
2471 /* immap = (immap_t *)IMAP_ADDR; */ /* and to internal registers */
2472
2473
2474 /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O.
2475 */
2476 /* The "standard" configuration through the 860.
2477 */
2478/* immap->im_ioport.iop_papar |= 0x00fc; */
2479/* immap->im_ioport.iop_padir &= ~0x00fc; */
2480/* immap->im_ioport.iop_paodr &= ~0x00fc; */
2481 cp->pio_papar |= 0x00fc;
2482 cp->pio_padir &= ~0x00fc;
2483 /* cp->pio_paodr &= ~0x00fc; */
2484
2485
2486 /* Since we don't yet do modem control, connect the port C pins
2487 * as general purpose I/O. This will assert CTS and CD for the
2488 * SCC ports.
2489 */
2490 /* FIXME: see 360um p.7-365 and 860um p.34-12
2491 * I can't make sense of these bits - mleslie*/
2492/* immap->im_ioport.iop_pcdir |= 0x03c6; */
2493/* immap->im_ioport.iop_pcpar &= ~0x03c6; */
2494
2495/* cp->pio_pcdir |= 0x03c6; */
2496/* cp->pio_pcpar &= ~0x03c6; */
2497
2498
2499
2500 /* Connect SCC2 and SCC3 to NMSI. Connect BRG3 to SCC2 and
2501 * BRG4 to SCC3.
2502 */
2503 cp->si_sicr &= ~0x00ffff00;
2504 cp->si_sicr |= 0x001b1200;
2505
2506#ifdef CONFIG_PP04
2507 /* Frequentis PP04 forced to RS-232 until we know better.
2508 * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4.
2509 */
2510 immap->im_ioport.iop_pcdir |= 0x000c;
2511 immap->im_ioport.iop_pcpar &= ~0x000c;
2512 immap->im_ioport.iop_pcdat &= ~0x000c;
2513
2514 /* This enables the TX driver.
2515 */
2516 cp->cp_pbpar &= ~0x6000;
2517 cp->cp_pbdat &= ~0x6000;
2518#endif
2519
2520 for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
2521 state->magic = SSTATE_MAGIC;
2522 state->line = i;
2523 state->type = PORT_UNKNOWN;
2524 state->custom_divisor = 0;
2525 state->close_delay = 5*HZ/10;
2526 state->closing_wait = 30*HZ;
2527 state->icount.cts = state->icount.dsr =
2528 state->icount.rng = state->icount.dcd = 0;
2529 state->icount.rx = state->icount.tx = 0;
2530 state->icount.frame = state->icount.parity = 0;
2531 state->icount.overrun = state->icount.brk = 0;
2532 printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n",
2533 i, (unsigned int)(state->irq),
2534 (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC");
2535
2536#ifdef CONFIG_SERIAL_CONSOLE
2537 /* If we just printed the message on the console port, and
2538 * we are about to initialize it for general use, we have
2539 * to wait a couple of character times for the CR/NL to
2540 * make it out of the transmit buffer.
2541 */
2542 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2543 mdelay(8);
2544
2545
2546/* idx = PORT_NUM(info->state->smc_scc_num); */
2547/* if (info->state->smc_scc_num & NUM_IS_SCC) */
2548/* chan = scc_chan_map[idx]; */
2549/* else */
2550/* chan = smc_chan_map[idx]; */
2551
2552/* cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */
2553/* while (cp->cp_cr & CPM_CR_FLG); */
2554
2555#endif
2556 /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */
2557 info = &quicc_ser_info[i];
2558 if (info) {
2559 memset (info, 0, sizeof(ser_info_t));
2560 info->magic = SERIAL_MAGIC;
2561 info->line = i;
2562 info->flags = state->flags;
2563 INIT_WORK(&info->tqueue, do_softint, info);
2564 INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
2565 init_waitqueue_head(&info->open_wait);
2566 init_waitqueue_head(&info->close_wait);
2567 info->state = state;
2568 state->info = (struct async_struct *)info;
2569
2570 /* We need to allocate a transmit and receive buffer
2571 * descriptors from dual port ram, and a character
2572 * buffer area from host mem.
2573 */
2574 dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO);
2575
2576 /* Allocate space for FIFOs in the host memory.
2577 * (for now this is from a static array of buffers :(
2578 */
2579 /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */
2580 /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */
2581 mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE];
2582
2583 /* Set the physical address of the host memory
2584 * buffers in the buffer descriptors, and the
2585 * virtual address for us to work with.
2586 */
2587 bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2588 info->rx_cur = info->rx_bd_base = bdp;
2589
2590 /* initialize rx buffer descriptors */
2591 for (j=0; j<(RX_NUM_FIFO-1); j++) {
2592 bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2593 bdp->status = BD_SC_EMPTY | BD_SC_INTRPT;
2594 mem_addr += RX_BUF_SIZE;
2595 bdp++;
2596 }
2597 bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2598 bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
2599
2600
2601 idx = PORT_NUM(info->state->smc_scc_num);
2602 if (info->state->smc_scc_num & NUM_IS_SCC) {
2603
2604#if defined (CONFIG_UCQUICC) && 1
2605 /* set the transceiver mode to RS232 */
2606 sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */
2607 sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02);
2608 *(uint *)_periph_base = sipex_mode_bits;
2609 /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */
2610#endif
2611 }
2612
2613 dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO);
2614
2615 /* Allocate space for FIFOs in the host memory.
2616 */
2617 /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */
2618 /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */
2619 mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE];
2620
2621 /* Set the physical address of the host memory
2622 * buffers in the buffer descriptors, and the
2623 * virtual address for us to work with.
2624 */
2625 /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2626 bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2627 info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp;
2628
2629 /* initialize tx buffer descriptors */
2630 for (j=0; j<(TX_NUM_FIFO-1); j++) {
2631 bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2632 bdp->status = BD_SC_INTRPT;
2633 mem_addr += TX_BUF_SIZE;
2634 bdp++;
2635 }
2636 bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2637 bdp->status = (BD_SC_WRAP | BD_SC_INTRPT);
2638
2639 if (info->state->smc_scc_num & NUM_IS_SCC) {
2640 scp = &pquicc->scc_regs[idx];
2641 sup = &pquicc->pram[info->state->port].scc.pscc.u;
2642 sup->rbase = dp_addr;
2643 sup->tbase = dp_addr;
2644
2645 /* Set up the uart parameters in the
2646 * parameter ram.
2647 */
2648 sup->rfcr = SMC_EB;
2649 sup->tfcr = SMC_EB;
2650
2651 /* Set this to 1 for now, so we get single
2652 * character interrupts. Using idle character
2653 * time requires some additional tuning.
2654 */
2655 sup->mrblr = 1;
2656 sup->max_idl = 0;
2657 sup->brkcr = 1;
2658 sup->parec = 0;
2659 sup->frmer = 0;
2660 sup->nosec = 0;
2661 sup->brkec = 0;
2662 sup->uaddr1 = 0;
2663 sup->uaddr2 = 0;
2664 sup->toseq = 0;
2665 {
2666 int i;
2667 for (i=0;i<8;i++)
2668 sup->cc[i] = 0x8000;
2669 }
2670 sup->rccm = 0xc0ff;
2671
2672 /* Send the CPM an initialize command.
2673 */
2674 chan = scc_chan_map[idx];
2675
2676 /* execute the INIT RX & TX PARAMS command for this channel. */
2677 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2678 while (cp->cp_cr & CPM_CR_FLG);
2679
2680 /* Set UART mode, 8 bit, no parity, one stop.
2681 * Enable receive and transmit.
2682 */
2683 scp->scc_gsmr.w.high = 0;
2684 scp->scc_gsmr.w.low =
2685 (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2686
2687 /* Disable all interrupts and clear all pending
2688 * events.
2689 */
2690 scp->scc_sccm = 0;
2691 scp->scc_scce = 0xffff;
2692 scp->scc_dsr = 0x7e7e;
2693 scp->scc_psmr = 0x3000;
2694
2695 /* If the port is the console, enable Rx and Tx.
2696 */
2697#ifdef CONFIG_SERIAL_CONSOLE
2698 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2699 scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2700#endif
2701 }
2702 else {
2703 /* Configure SMCs Tx/Rx instead of port B
2704 * parallel I/O.
2705 */
2706 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2707 up->rbase = dp_addr;
2708
2709 iobits = 0xc0 << (idx * 4);
2710 cp->pip_pbpar |= iobits;
2711 cp->pip_pbdir &= ~iobits;
2712 cp->pip_pbodr &= ~iobits;
2713
2714
2715 /* Connect the baud rate generator to the
2716 * SMC based upon index in rs_table. Also
2717 * make sure it is connected to NMSI.
2718 */
2719 cp->si_simode &= ~(0xffff << (idx * 16));
2720 cp->si_simode |= (i << ((idx * 16) + 12));
2721
2722 up->tbase = dp_addr;
2723
2724 /* Set up the uart parameters in the
2725 * parameter ram.
2726 */
2727 up->rfcr = SMC_EB;
2728 up->tfcr = SMC_EB;
2729
2730 /* Set this to 1 for now, so we get single
2731 * character interrupts. Using idle character
2732 * time requires some additional tuning.
2733 */
2734 up->mrblr = 1;
2735 up->max_idl = 0;
2736 up->brkcr = 1;
2737
2738 /* Send the CPM an initialize command.
2739 */
2740 chan = smc_chan_map[idx];
2741
2742 cp->cp_cr = mk_cr_cmd(chan,
2743 CPM_CR_INIT_TRX) | CPM_CR_FLG;
2744#ifdef CONFIG_SERIAL_CONSOLE
2745 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2746 printk("");
2747#endif
2748 while (cp->cp_cr & CPM_CR_FLG);
2749
2750 /* Set UART mode, 8 bit, no parity, one stop.
2751 * Enable receive and transmit.
2752 */
2753 sp = &cp->smc_regs[idx];
2754 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
2755
2756 /* Disable all interrupts and clear all pending
2757 * events.
2758 */
2759 sp->smc_smcm = 0;
2760 sp->smc_smce = 0xff;
2761
2762 /* If the port is the console, enable Rx and Tx.
2763 */
2764#ifdef CONFIG_SERIAL_CONSOLE
2765 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2766 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2767#endif
2768 }
2769
2770 /* Install interrupt handler.
2771 */
2772 /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info); */
2773 /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */
2774 request_irq(state->irq, rs_360_interrupt,
2775 IRQ_FLG_LOCK, "ttyS", (void *)info);
2776
2777 /* Set up the baud rate generator.
2778 */
2779 m360_cpm_setbrg(i, baud_table[baud_idx]);
2780
2781 }
2782 }
2783
2784 return 0;
2785}
2786module_init(rs_360_init);
2787
2788/* This must always be called before the rs_360_init() function, otherwise
2789 * it blows away the port control information.
2790 */
2791//static int __init serial_console_setup( struct console *co, char *options)
2792int serial_console_setup( struct console *co, char *options)
2793{
2794 struct serial_state *ser;
2795 uint mem_addr, dp_addr, bidx, idx, iobits;
2796 ushort chan;
2797 QUICC_BD *bdp;
2798 volatile QUICC *cp;
2799 volatile struct smc_regs *sp;
2800 volatile struct scc_regs *scp;
2801 volatile struct smc_uart_pram *up;
2802 volatile struct uart_pram *sup;
2803
2804/* mleslie TODO:
2805 * add something to the 68k bootloader to store a desired initial console baud rate */
2806
2807/* bd_t *bd; */ /* a board info struct used by EPPC-bug */
2808/* bd = (bd_t *)__res; */
2809
2810 for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++)
2811 /* if (bd->bi_baudrate == baud_table[bidx]) */
2812 if (CONSOLE_BAUDRATE == baud_table[bidx])
2813 break;
2814
2815 /* co->cflag = CREAD|CLOCAL|bidx|CS8; */
2816 baud_idx = bidx;
2817
2818 ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT;
2819
2820 cp = pquicc; /* Get pointer to Communication Processor */
2821
2822 idx = PORT_NUM(ser->smc_scc_num);
2823 if (ser->smc_scc_num & NUM_IS_SCC) {
2824
2825 /* TODO: need to set up SCC pin assignment etc. here */
2826
2827 }
2828 else {
2829 iobits = 0xc0 << (idx * 4);
2830 cp->pip_pbpar |= iobits;
2831 cp->pip_pbdir &= ~iobits;
2832 cp->pip_pbodr &= ~iobits;
2833
2834 /* Connect the baud rate generator to the
2835 * SMC based upon index in rs_table. Also
2836 * make sure it is connected to NMSI.
2837 */
2838 cp->si_simode &= ~(0xffff << (idx * 16));
2839 cp->si_simode |= (idx << ((idx * 16) + 12));
2840 }
2841
2842 /* When we get here, the CPM has been reset, so we need
2843 * to configure the port.
2844 * We need to allocate a transmit and receive buffer descriptor
2845 * from dual port ram, and a character buffer area from host mem.
2846 */
2847
2848 /* Allocate space for two buffer descriptors in the DP ram.
2849 */
2850 dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO);
2851
2852 /* Allocate space for two 2 byte FIFOs in the host memory.
2853 */
2854 /* mem_addr = m360_cpm_hostalloc(8); */
2855 mem_addr = (uint)console_fifos;
2856
2857
2858 /* Set the physical address of the host memory buffers in
2859 * the buffer descriptors.
2860 */
2861 /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2862 bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2863 bdp->buf = (char *)mem_addr;
2864 (bdp+1)->buf = (char *)(mem_addr+4);
2865
2866 /* For the receive, set empty and wrap.
2867 * For transmit, set wrap.
2868 */
2869 bdp->status = BD_SC_EMPTY | BD_SC_WRAP;
2870 (bdp+1)->status = BD_SC_WRAP;
2871
2872 /* Set up the uart parameters in the parameter ram.
2873 */
2874 if (ser->smc_scc_num & NUM_IS_SCC) {
2875 scp = &cp->scc_regs[idx];
2876 /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */
2877 sup = &pquicc->pram[ser->port].scc.pscc.u;
2878
2879 sup->rbase = dp_addr;
2880 sup->tbase = dp_addr + sizeof(QUICC_BD);
2881
2882 /* Set up the uart parameters in the
2883 * parameter ram.
2884 */
2885 sup->rfcr = SMC_EB;
2886 sup->tfcr = SMC_EB;
2887
2888 /* Set this to 1 for now, so we get single
2889 * character interrupts. Using idle character
2890 * time requires some additional tuning.
2891 */
2892 sup->mrblr = 1;
2893 sup->max_idl = 0;
2894 sup->brkcr = 1;
2895 sup->parec = 0;
2896 sup->frmer = 0;
2897 sup->nosec = 0;
2898 sup->brkec = 0;
2899 sup->uaddr1 = 0;
2900 sup->uaddr2 = 0;
2901 sup->toseq = 0;
2902 {
2903 int i;
2904 for (i=0;i<8;i++)
2905 sup->cc[i] = 0x8000;
2906 }
2907 sup->rccm = 0xc0ff;
2908
2909 /* Send the CPM an initialize command.
2910 */
2911 chan = scc_chan_map[idx];
2912
2913 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2914 while (cp->cp_cr & CPM_CR_FLG);
2915
2916 /* Set UART mode, 8 bit, no parity, one stop.
2917 * Enable receive and transmit.
2918 */
2919 scp->scc_gsmr.w.high = 0;
2920 scp->scc_gsmr.w.low =
2921 (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2922
2923 /* Disable all interrupts and clear all pending
2924 * events.
2925 */
2926 scp->scc_sccm = 0;
2927 scp->scc_scce = 0xffff;
2928 scp->scc_dsr = 0x7e7e;
2929 scp->scc_psmr = 0x3000;
2930
2931 scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2932
2933 }
2934 else {
2935 /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */
2936 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2937
2938 up->rbase = dp_addr; /* Base of receive buffer desc. */
2939 up->tbase = dp_addr+sizeof(QUICC_BD); /* Base of xmt buffer desc. */
2940 up->rfcr = SMC_EB;
2941 up->tfcr = SMC_EB;
2942
2943 /* Set this to 1 for now, so we get single character interrupts.
2944 */
2945 up->mrblr = 1; /* receive buffer length */
2946 up->max_idl = 0; /* wait forever for next char */
2947
2948 /* Send the CPM an initialize command.
2949 */
2950 chan = smc_chan_map[idx];
2951 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2952 while (cp->cp_cr & CPM_CR_FLG);
2953
2954 /* Set UART mode, 8 bit, no parity, one stop.
2955 * Enable receive and transmit.
2956 */
2957 sp = &cp->smc_regs[idx];
2958 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
2959
2960 /* And finally, enable Rx and Tx.
2961 */
2962 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2963 }
2964
2965 /* Set up the baud rate generator.
2966 */
2967 /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */
2968 m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE);
2969
2970 return 0;
2971}
2972
2973/*
2974 * Local variables:
2975 * c-indent-level: 4
2976 * c-basic-offset: 4
2977 * tab-width: 4
2978 * End:
2979 */
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 8ee3a6626ceb..5f479dada6f2 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1042,23 +1042,6 @@ config SERIAL_MCF_CONSOLE
1042 help 1042 help
1043 Enable a ColdFire internal serial port to be the system console. 1043 Enable a ColdFire internal serial port to be the system console.
1044 1044
1045config SERIAL_68360_SMC
1046 bool "68360 SMC uart support"
1047 depends on M68360
1048 help
1049 This driver supports the SMC serial ports of the Motorola 68360 CPU.
1050
1051config SERIAL_68360_SCC
1052 bool "68360 SCC uart support"
1053 depends on M68360
1054 help
1055 This driver supports the SCC serial ports of the Motorola 68360 CPU.
1056
1057config SERIAL_68360
1058 bool
1059 depends on SERIAL_68360_SMC || SERIAL_68360_SCC
1060 default y
1061
1062config SERIAL_PMACZILOG 1045config SERIAL_PMACZILOG
1063 tristate "Mac or PowerMac z85c30 ESCC support" 1046 tristate "Mac or PowerMac z85c30 ESCC support"
1064 depends on (M68K && MAC) || (PPC_OF && PPC_PMAC) 1047 depends on (M68K && MAC) || (PPC_OF && PPC_PMAC)
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 7b59958f50ec..e10cf5b54b6d 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -50,7 +50,6 @@ obj-$(CONFIG_SERIAL_MAX3107_AAVA) += max3107-aava.o
50obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o 50obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
51obj-$(CONFIG_SERIAL_MUX) += mux.o 51obj-$(CONFIG_SERIAL_MUX) += mux.o
52obj-$(CONFIG_SERIAL_68328) += 68328serial.o 52obj-$(CONFIG_SERIAL_68328) += 68328serial.o
53obj-$(CONFIG_SERIAL_68360) += 68360serial.o
54obj-$(CONFIG_SERIAL_MCF) += mcf.o 53obj-$(CONFIG_SERIAL_MCF) += mcf.o
55obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o 54obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o
56obj-$(CONFIG_SERIAL_DZ) += dz.o 55obj-$(CONFIG_SERIAL_DZ) += dz.o
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 22:16:28 -0500