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-rw-r--r--arch/m68k/bvme6000/Makefile5
-rw-r--r--arch/m68k/bvme6000/bvmeints.c160
-rw-r--r--arch/m68k/bvme6000/config.c380
-rw-r--r--arch/m68k/bvme6000/rtc.c182
4 files changed, 727 insertions, 0 deletions
diff --git a/arch/m68k/bvme6000/Makefile b/arch/m68k/bvme6000/Makefile
new file mode 100644
index 000000000000..2348e6ceed1e
--- /dev/null
+++ b/arch/m68k/bvme6000/Makefile
@@ -0,0 +1,5 @@
1#
2# Makefile for Linux arch/m68k/bvme6000 source directory
3#
4
5obj-y := config.o bvmeints.o rtc.o
diff --git a/arch/m68k/bvme6000/bvmeints.c b/arch/m68k/bvme6000/bvmeints.c
new file mode 100644
index 000000000000..298a8df02664
--- /dev/null
+++ b/arch/m68k/bvme6000/bvmeints.c
@@ -0,0 +1,160 @@
1/*
2 * arch/m68k/bvme6000/bvmeints.c
3 *
4 * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
5 *
6 * based on amiints.c -- Amiga Linux interrupt handling code
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file README.legal in the main directory of this archive
10 * for more details.
11 *
12 */
13
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/seq_file.h>
18
19#include <asm/ptrace.h>
20#include <asm/system.h>
21#include <asm/irq.h>
22#include <asm/traps.h>
23
24static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp);
25
26/*
27 * This should ideally be 4 elements only, for speed.
28 */
29
30static struct {
31 irqreturn_t (*handler)(int, void *, struct pt_regs *);
32 unsigned long flags;
33 void *dev_id;
34 const char *devname;
35 unsigned count;
36} irq_tab[256];
37
38/*
39 * void bvme6000_init_IRQ (void)
40 *
41 * Parameters: None
42 *
43 * Returns: Nothing
44 *
45 * This function is called during kernel startup to initialize
46 * the bvme6000 IRQ handling routines.
47 */
48
49void bvme6000_init_IRQ (void)
50{
51 int i;
52
53 for (i = 0; i < 256; i++) {
54 irq_tab[i].handler = bvme6000_defhand;
55 irq_tab[i].flags = IRQ_FLG_STD;
56 irq_tab[i].dev_id = NULL;
57 irq_tab[i].devname = NULL;
58 irq_tab[i].count = 0;
59 }
60}
61
62int bvme6000_request_irq(unsigned int irq,
63 irqreturn_t (*handler)(int, void *, struct pt_regs *),
64 unsigned long flags, const char *devname, void *dev_id)
65{
66 if (irq > 255) {
67 printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
68 return -ENXIO;
69 }
70#if 0
71 /* Nothing special about auto-vectored devices for the BVME6000,
72 * but treat it specially to avoid changes elsewhere.
73 */
74
75 if (irq >= VEC_INT1 && irq <= VEC_INT7)
76 return cpu_request_irq(irq - VEC_SPUR, handler, flags,
77 devname, dev_id);
78#endif
79 if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
80 if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
81 printk("%s: IRQ %d from %s is not replaceable\n",
82 __FUNCTION__, irq, irq_tab[irq].devname);
83 return -EBUSY;
84 }
85 if (flags & IRQ_FLG_REPLACE) {
86 printk("%s: %s can't replace IRQ %d from %s\n",
87 __FUNCTION__, devname, irq, irq_tab[irq].devname);
88 return -EBUSY;
89 }
90 }
91 irq_tab[irq].handler = handler;
92 irq_tab[irq].flags = flags;
93 irq_tab[irq].dev_id = dev_id;
94 irq_tab[irq].devname = devname;
95 return 0;
96}
97
98void bvme6000_free_irq(unsigned int irq, void *dev_id)
99{
100 if (irq > 255) {
101 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
102 return;
103 }
104#if 0
105 if (irq >= VEC_INT1 && irq <= VEC_INT7) {
106 cpu_free_irq(irq - VEC_SPUR, dev_id);
107 return;
108 }
109#endif
110 if (irq_tab[irq].dev_id != dev_id)
111 printk("%s: Removing probably wrong IRQ %d from %s\n",
112 __FUNCTION__, irq, irq_tab[irq].devname);
113
114 irq_tab[irq].handler = bvme6000_defhand;
115 irq_tab[irq].flags = IRQ_FLG_STD;
116 irq_tab[irq].dev_id = NULL;
117 irq_tab[irq].devname = NULL;
118}
119
120irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp)
121{
122 if (vec > 255) {
123 printk ("bvme6000_process_int: Illegal vector %ld", vec);
124 return IRQ_NONE;
125 } else {
126 irq_tab[vec].count++;
127 irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
128 return IRQ_HANDLED;
129 }
130}
131
132int show_bvme6000_interrupts(struct seq_file *p, void *v)
133{
134 int i;
135
136 for (i = 0; i < 256; i++) {
137 if (irq_tab[i].count)
138 seq_printf(p, "Vec 0x%02x: %8d %s\n",
139 i, irq_tab[i].count,
140 irq_tab[i].devname ? irq_tab[i].devname : "free");
141 }
142 return 0;
143}
144
145
146static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp)
147{
148 printk ("Unknown interrupt 0x%02x\n", irq);
149 return IRQ_NONE;
150}
151
152void bvme6000_enable_irq (unsigned int irq)
153{
154}
155
156
157void bvme6000_disable_irq (unsigned int irq)
158{
159}
160
diff --git a/arch/m68k/bvme6000/config.c b/arch/m68k/bvme6000/config.c
new file mode 100644
index 000000000000..3ffc84f9c291
--- /dev/null
+++ b/arch/m68k/bvme6000/config.c
@@ -0,0 +1,380 @@
1/*
2 * arch/m68k/bvme6000/config.c
3 *
4 * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
5 *
6 * Based on:
7 *
8 * linux/amiga/config.c
9 *
10 * Copyright (C) 1993 Hamish Macdonald
11 *
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file README.legal in the main directory of this archive
14 * for more details.
15 */
16
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/mm.h>
20#include <linux/tty.h>
21#include <linux/console.h>
22#include <linux/linkage.h>
23#include <linux/init.h>
24#include <linux/major.h>
25#include <linux/genhd.h>
26#include <linux/rtc.h>
27#include <linux/interrupt.h>
28
29#include <asm/bootinfo.h>
30#include <asm/system.h>
31#include <asm/pgtable.h>
32#include <asm/setup.h>
33#include <asm/irq.h>
34#include <asm/traps.h>
35#include <asm/rtc.h>
36#include <asm/machdep.h>
37#include <asm/bvme6000hw.h>
38
39extern irqreturn_t bvme6000_process_int (int level, struct pt_regs *regs);
40extern void bvme6000_init_IRQ (void);
41extern void bvme6000_free_irq (unsigned int, void *);
42extern int show_bvme6000_interrupts(struct seq_file *, void *);
43extern void bvme6000_enable_irq (unsigned int);
44extern void bvme6000_disable_irq (unsigned int);
45static void bvme6000_get_model(char *model);
46static int bvme6000_get_hardware_list(char *buffer);
47extern int bvme6000_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
48extern void bvme6000_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
49extern unsigned long bvme6000_gettimeoffset (void);
50extern int bvme6000_hwclk (int, struct rtc_time *);
51extern int bvme6000_set_clock_mmss (unsigned long);
52extern void bvme6000_reset (void);
53extern void bvme6000_waitbut(void);
54void bvme6000_set_vectors (void);
55
56static unsigned char bcd2bin (unsigned char b);
57static unsigned char bin2bcd (unsigned char b);
58
59/* Save tick handler routine pointer, will point to do_timer() in
60 * kernel/sched.c, called via bvme6000_process_int() */
61
62static irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
63
64
65int bvme6000_parse_bootinfo(const struct bi_record *bi)
66{
67 if (bi->tag == BI_VME_TYPE)
68 return 0;
69 else
70 return 1;
71}
72
73void bvme6000_reset(void)
74{
75 volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
76
77 printk ("\r\n\nCalled bvme6000_reset\r\n"
78 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
79 /* The string of returns is to delay the reset until the whole
80 * message is output. */
81 /* Enable the watchdog, via PIT port C bit 4 */
82
83 pit->pcddr |= 0x10; /* WDOG enable */
84
85 while(1)
86 ;
87}
88
89static void bvme6000_get_model(char *model)
90{
91 sprintf(model, "BVME%d000", m68k_cputype == CPU_68060 ? 6 : 4);
92}
93
94
95/* No hardware options on BVME6000? */
96
97static int bvme6000_get_hardware_list(char *buffer)
98{
99 *buffer = '\0';
100 return 0;
101}
102
103
104void __init config_bvme6000(void)
105{
106 volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
107
108 /* Board type is only set by newer versions of vmelilo/tftplilo */
109 if (!vme_brdtype) {
110 if (m68k_cputype == CPU_68060)
111 vme_brdtype = VME_TYPE_BVME6000;
112 else
113 vme_brdtype = VME_TYPE_BVME4000;
114 }
115#if 0
116 /* Call bvme6000_set_vectors() so ABORT will work, along with BVMBug
117 * debugger. Note trap_init() will splat the abort vector, but
118 * bvme6000_init_IRQ() will put it back again. Hopefully. */
119
120 bvme6000_set_vectors();
121#endif
122
123 mach_max_dma_address = 0xffffffff;
124 mach_sched_init = bvme6000_sched_init;
125 mach_init_IRQ = bvme6000_init_IRQ;
126 mach_gettimeoffset = bvme6000_gettimeoffset;
127 mach_hwclk = bvme6000_hwclk;
128 mach_set_clock_mmss = bvme6000_set_clock_mmss;
129 mach_reset = bvme6000_reset;
130 mach_free_irq = bvme6000_free_irq;
131 mach_process_int = bvme6000_process_int;
132 mach_get_irq_list = show_bvme6000_interrupts;
133 mach_request_irq = bvme6000_request_irq;
134 enable_irq = bvme6000_enable_irq;
135 disable_irq = bvme6000_disable_irq;
136 mach_get_model = bvme6000_get_model;
137 mach_get_hardware_list = bvme6000_get_hardware_list;
138
139 printk ("Board is %sconfigured as a System Controller\n",
140 *config_reg_ptr & BVME_CONFIG_SW1 ? "" : "not ");
141
142 /* Now do the PIT configuration */
143
144 pit->pgcr = 0x00; /* Unidirectional 8 bit, no handshake for now */
145 pit->psrr = 0x18; /* PIACK and PIRQ fucntions enabled */
146 pit->pacr = 0x00; /* Sub Mode 00, H2 i/p, no DMA */
147 pit->padr = 0x00; /* Just to be tidy! */
148 pit->paddr = 0x00; /* All inputs for now (safest) */
149 pit->pbcr = 0x80; /* Sub Mode 1x, H4 i/p, no DMA */
150 pit->pbdr = 0xbc | (*config_reg_ptr & BVME_CONFIG_SW1 ? 0 : 0x40);
151 /* PRI, SYSCON?, Level3, SCC clks from xtal */
152 pit->pbddr = 0xf3; /* Mostly outputs */
153 pit->pcdr = 0x01; /* PA transceiver disabled */
154 pit->pcddr = 0x03; /* WDOG disable */
155
156 /* Disable snooping for Ethernet and VME accesses */
157
158 bvme_acr_addrctl = 0;
159}
160
161
162irqreturn_t bvme6000_abort_int (int irq, void *dev_id, struct pt_regs *fp)
163{
164 unsigned long *new = (unsigned long *)vectors;
165 unsigned long *old = (unsigned long *)0xf8000000;
166
167 /* Wait for button release */
168 while (*(volatile unsigned char *)BVME_LOCAL_IRQ_STAT & BVME_ABORT_STATUS)
169 ;
170
171 *(new+4) = *(old+4); /* Illegal instruction */
172 *(new+9) = *(old+9); /* Trace */
173 *(new+47) = *(old+47); /* Trap #15 */
174 *(new+0x1f) = *(old+0x1f); /* ABORT switch */
175 return IRQ_HANDLED;
176}
177
178
179static irqreturn_t bvme6000_timer_int (int irq, void *dev_id, struct pt_regs *fp)
180{
181 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
182 unsigned char msr = rtc->msr & 0xc0;
183
184 rtc->msr = msr | 0x20; /* Ack the interrupt */
185
186 return tick_handler(irq, dev_id, fp);
187}
188
189/*
190 * Set up the RTC timer 1 to mode 2, so T1 output toggles every 5ms
191 * (40000 x 125ns). It will interrupt every 10ms, when T1 goes low.
192 * So, when reading the elapsed time, you should read timer1,
193 * subtract it from 39999, and then add 40000 if T1 is high.
194 * That gives you the number of 125ns ticks in to the 10ms period,
195 * so divide by 8 to get the microsecond result.
196 */
197
198void bvme6000_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
199{
200 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
201 unsigned char msr = rtc->msr & 0xc0;
202
203 rtc->msr = 0; /* Ensure timer registers accessible */
204
205 tick_handler = timer_routine;
206 if (request_irq(BVME_IRQ_RTC, bvme6000_timer_int, 0,
207 "timer", bvme6000_timer_int))
208 panic ("Couldn't register timer int");
209
210 rtc->t1cr_omr = 0x04; /* Mode 2, ext clk */
211 rtc->t1msb = 39999 >> 8;
212 rtc->t1lsb = 39999 & 0xff;
213 rtc->irr_icr1 &= 0xef; /* Route timer 1 to INTR pin */
214 rtc->msr = 0x40; /* Access int.cntrl, etc */
215 rtc->pfr_icr0 = 0x80; /* Just timer 1 ints enabled */
216 rtc->irr_icr1 = 0;
217 rtc->t1cr_omr = 0x0a; /* INTR+T1 active lo, push-pull */
218 rtc->t0cr_rtmr &= 0xdf; /* Stop timers in standby */
219 rtc->msr = 0; /* Access timer 1 control */
220 rtc->t1cr_omr = 0x05; /* Mode 2, ext clk, GO */
221
222 rtc->msr = msr;
223
224 if (request_irq(BVME_IRQ_ABORT, bvme6000_abort_int, 0,
225 "abort", bvme6000_abort_int))
226 panic ("Couldn't register abort int");
227}
228
229
230/* This is always executed with interrupts disabled. */
231
232/*
233 * NOTE: Don't accept any readings within 5us of rollover, as
234 * the T1INT bit may be a little slow getting set. There is also
235 * a fault in the chip, meaning that reads may produce invalid
236 * results...
237 */
238
239unsigned long bvme6000_gettimeoffset (void)
240{
241 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
242 volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
243 unsigned char msr = rtc->msr & 0xc0;
244 unsigned char t1int, t1op;
245 unsigned long v = 800000, ov;
246
247 rtc->msr = 0; /* Ensure timer registers accessible */
248
249 do {
250 ov = v;
251 t1int = rtc->msr & 0x20;
252 t1op = pit->pcdr & 0x04;
253 rtc->t1cr_omr |= 0x40; /* Latch timer1 */
254 v = rtc->t1msb << 8; /* Read timer1 */
255 v |= rtc->t1lsb; /* Read timer1 */
256 } while (t1int != (rtc->msr & 0x20) ||
257 t1op != (pit->pcdr & 0x04) ||
258 abs(ov-v) > 80 ||
259 v > 39960);
260
261 v = 39999 - v;
262 if (!t1op) /* If in second half cycle.. */
263 v += 40000;
264 v /= 8; /* Convert ticks to microseconds */
265 if (t1int)
266 v += 10000; /* Int pending, + 10ms */
267 rtc->msr = msr;
268
269 return v;
270}
271
272static unsigned char bcd2bin (unsigned char b)
273{
274 return ((b>>4)*10 + (b&15));
275}
276
277static unsigned char bin2bcd (unsigned char b)
278{
279 return (((b/10)*16) + (b%10));
280}
281
282
283/*
284 * Looks like op is non-zero for setting the clock, and zero for
285 * reading the clock.
286 *
287 * struct hwclk_time {
288 * unsigned sec; 0..59
289 * unsigned min; 0..59
290 * unsigned hour; 0..23
291 * unsigned day; 1..31
292 * unsigned mon; 0..11
293 * unsigned year; 00...
294 * int wday; 0..6, 0 is Sunday, -1 means unknown/don't set
295 * };
296 */
297
298int bvme6000_hwclk(int op, struct rtc_time *t)
299{
300 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
301 unsigned char msr = rtc->msr & 0xc0;
302
303 rtc->msr = 0x40; /* Ensure clock and real-time-mode-register
304 * are accessible */
305 if (op)
306 { /* Write.... */
307 rtc->t0cr_rtmr = t->tm_year%4;
308 rtc->bcd_tenms = 0;
309 rtc->bcd_sec = bin2bcd(t->tm_sec);
310 rtc->bcd_min = bin2bcd(t->tm_min);
311 rtc->bcd_hr = bin2bcd(t->tm_hour);
312 rtc->bcd_dom = bin2bcd(t->tm_mday);
313 rtc->bcd_mth = bin2bcd(t->tm_mon + 1);
314 rtc->bcd_year = bin2bcd(t->tm_year%100);
315 if (t->tm_wday >= 0)
316 rtc->bcd_dow = bin2bcd(t->tm_wday+1);
317 rtc->t0cr_rtmr = t->tm_year%4 | 0x08;
318 }
319 else
320 { /* Read.... */
321 do {
322 t->tm_sec = bcd2bin(rtc->bcd_sec);
323 t->tm_min = bcd2bin(rtc->bcd_min);
324 t->tm_hour = bcd2bin(rtc->bcd_hr);
325 t->tm_mday = bcd2bin(rtc->bcd_dom);
326 t->tm_mon = bcd2bin(rtc->bcd_mth)-1;
327 t->tm_year = bcd2bin(rtc->bcd_year);
328 if (t->tm_year < 70)
329 t->tm_year += 100;
330 t->tm_wday = bcd2bin(rtc->bcd_dow)-1;
331 } while (t->tm_sec != bcd2bin(rtc->bcd_sec));
332 }
333
334 rtc->msr = msr;
335
336 return 0;
337}
338
339/*
340 * Set the minutes and seconds from seconds value 'nowtime'. Fail if
341 * clock is out by > 30 minutes. Logic lifted from atari code.
342 * Algorithm is to wait for the 10ms register to change, and then to
343 * wait a short while, and then set it.
344 */
345
346int bvme6000_set_clock_mmss (unsigned long nowtime)
347{
348 int retval = 0;
349 short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
350 unsigned char rtc_minutes, rtc_tenms;
351 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
352 unsigned char msr = rtc->msr & 0xc0;
353 unsigned long flags;
354 volatile int i;
355
356 rtc->msr = 0; /* Ensure clock accessible */
357 rtc_minutes = bcd2bin (rtc->bcd_min);
358
359 if ((rtc_minutes < real_minutes
360 ? real_minutes - rtc_minutes
361 : rtc_minutes - real_minutes) < 30)
362 {
363 local_irq_save(flags);
364 rtc_tenms = rtc->bcd_tenms;
365 while (rtc_tenms == rtc->bcd_tenms)
366 ;
367 for (i = 0; i < 1000; i++)
368 ;
369 rtc->bcd_min = bin2bcd(real_minutes);
370 rtc->bcd_sec = bin2bcd(real_seconds);
371 local_irq_restore(flags);
372 }
373 else
374 retval = -1;
375
376 rtc->msr = msr;
377
378 return retval;
379}
380
diff --git a/arch/m68k/bvme6000/rtc.c b/arch/m68k/bvme6000/rtc.c
new file mode 100644
index 000000000000..c6b2a410bf9a
--- /dev/null
+++ b/arch/m68k/bvme6000/rtc.c
@@ -0,0 +1,182 @@
1/*
2 * Real Time Clock interface for Linux on the BVME6000
3 *
4 * Based on the PC driver by Paul Gortmaker.
5 */
6
7#define RTC_VERSION "1.00"
8
9#include <linux/types.h>
10#include <linux/errno.h>
11#include <linux/miscdevice.h>
12#include <linux/slab.h>
13#include <linux/ioport.h>
14#include <linux/fcntl.h>
15#include <linux/init.h>
16#include <linux/poll.h>
17#include <linux/mc146818rtc.h> /* For struct rtc_time and ioctls, etc */
18#include <linux/smp_lock.h>
19#include <asm/bvme6000hw.h>
20
21#include <asm/io.h>
22#include <asm/uaccess.h>
23#include <asm/system.h>
24#include <asm/setup.h>
25
26/*
27 * We sponge a minor off of the misc major. No need slurping
28 * up another valuable major dev number for this. If you add
29 * an ioctl, make sure you don't conflict with SPARC's RTC
30 * ioctls.
31 */
32
33#define BCD2BIN(val) (((val)&15) + ((val)>>4)*10)
34#define BIN2BCD(val) ((((val)/10)<<4) + (val)%10)
35
36static unsigned char days_in_mo[] =
37{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
38
39static char rtc_status;
40
41static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
42 unsigned long arg)
43{
44 volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
45 unsigned char msr;
46 unsigned long flags;
47 struct rtc_time wtime;
48
49 switch (cmd) {
50 case RTC_RD_TIME: /* Read the time/date from RTC */
51 {
52 local_irq_save(flags);
53 /* Ensure clock and real-time-mode-register are accessible */
54 msr = rtc->msr & 0xc0;
55 rtc->msr = 0x40;
56 memset(&wtime, 0, sizeof(struct rtc_time));
57 do {
58 wtime.tm_sec = BCD2BIN(rtc->bcd_sec);
59 wtime.tm_min = BCD2BIN(rtc->bcd_min);
60 wtime.tm_hour = BCD2BIN(rtc->bcd_hr);
61 wtime.tm_mday = BCD2BIN(rtc->bcd_dom);
62 wtime.tm_mon = BCD2BIN(rtc->bcd_mth)-1;
63 wtime.tm_year = BCD2BIN(rtc->bcd_year);
64 if (wtime.tm_year < 70)
65 wtime.tm_year += 100;
66 wtime.tm_wday = BCD2BIN(rtc->bcd_dow)-1;
67 } while (wtime.tm_sec != BCD2BIN(rtc->bcd_sec));
68 rtc->msr = msr;
69 local_irq_restore(flags);
70 return copy_to_user((void *)arg, &wtime, sizeof wtime) ?
71 -EFAULT : 0;
72 }
73 case RTC_SET_TIME: /* Set the RTC */
74 {
75 struct rtc_time rtc_tm;
76 unsigned char mon, day, hrs, min, sec, leap_yr;
77 unsigned int yrs;
78
79 if (!capable(CAP_SYS_ADMIN))
80 return -EACCES;
81
82 if (copy_from_user(&rtc_tm, (struct rtc_time*)arg,
83 sizeof(struct rtc_time)))
84 return -EFAULT;
85
86 yrs = rtc_tm.tm_year;
87 if (yrs < 1900)
88 yrs += 1900;
89 mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
90 day = rtc_tm.tm_mday;
91 hrs = rtc_tm.tm_hour;
92 min = rtc_tm.tm_min;
93 sec = rtc_tm.tm_sec;
94
95 leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
96
97 if ((mon > 12) || (mon < 1) || (day == 0))
98 return -EINVAL;
99
100 if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
101 return -EINVAL;
102
103 if ((hrs >= 24) || (min >= 60) || (sec >= 60))
104 return -EINVAL;
105
106 if (yrs >= 2070)
107 return -EINVAL;
108
109 local_irq_save(flags);
110 /* Ensure clock and real-time-mode-register are accessible */
111 msr = rtc->msr & 0xc0;
112 rtc->msr = 0x40;
113
114 rtc->t0cr_rtmr = yrs%4;
115 rtc->bcd_tenms = 0;
116 rtc->bcd_sec = BIN2BCD(sec);
117 rtc->bcd_min = BIN2BCD(min);
118 rtc->bcd_hr = BIN2BCD(hrs);
119 rtc->bcd_dom = BIN2BCD(day);
120 rtc->bcd_mth = BIN2BCD(mon);
121 rtc->bcd_year = BIN2BCD(yrs%100);
122 if (rtc_tm.tm_wday >= 0)
123 rtc->bcd_dow = BIN2BCD(rtc_tm.tm_wday+1);
124 rtc->t0cr_rtmr = yrs%4 | 0x08;
125
126 rtc->msr = msr;
127 local_irq_restore(flags);
128 return 0;
129 }
130 default:
131 return -EINVAL;
132 }
133}
134
135/*
136 * We enforce only one user at a time here with the open/close.
137 * Also clear the previous interrupt data on an open, and clean
138 * up things on a close.
139 */
140
141static int rtc_open(struct inode *inode, struct file *file)
142{
143 if(rtc_status)
144 return -EBUSY;
145
146 rtc_status = 1;
147 return 0;
148}
149
150static int rtc_release(struct inode *inode, struct file *file)
151{
152 lock_kernel();
153 rtc_status = 0;
154 unlock_kernel();
155 return 0;
156}
157
158/*
159 * The various file operations we support.
160 */
161
162static struct file_operations rtc_fops = {
163 .ioctl = rtc_ioctl,
164 .open = rtc_open,
165 .release = rtc_release,
166};
167
168static struct miscdevice rtc_dev = {
169 .minor = RTC_MINOR,
170 .name = "rtc",
171 .fops = &rtc_fops
172};
173
174int __init rtc_DP8570A_init(void)
175{
176 if (!MACH_IS_BVME6000)
177 return -ENODEV;
178
179 printk(KERN_INFO "DP8570A Real Time Clock Driver v%s\n", RTC_VERSION);
180 return misc_register(&rtc_dev);
181}
182
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 12:31:43 -0500