?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ALSA: asihpi - Add hd radio blend functions
[firewire-audio.git] / drivers / input / misc / hp_sdc_rtc.c
blobad730e15afc0c7ce8f2cb30b13f12e2cc34aec3a
1 /*
2 * HP i8042 SDC + MSM-58321 BBRTC driver.
3 *
4 * Copyright (c) 2001 Brian S. Julin
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU General Public License ("GPL").
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 *
29 * References:
30 * System Device Controller Microprocessor Firmware Theory of Operation
31 * for Part Number 1820-4784 Revision B. Dwg No. A-1820-4784-2
32 * efirtc.c by Stephane Eranian/Hewlett Packard
33 *
34 */
35
36 #include <linux/hp_sdc.h>
37 #include <linux/errno.h>
38 #include <linux/types.h>
39 #include <linux/init.h>
40 #include <linux/module.h>
41 #include <linux/time.h>
42 #include <linux/miscdevice.h>
43 #include <linux/proc_fs.h>
44 #include <linux/poll.h>
45 #include <linux/rtc.h>
46 #include <linux/semaphore.h>
47
48 MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
49 MODULE_DESCRIPTION("HP i8042 SDC + MSM-58321 RTC Driver");
50 MODULE_LICENSE("Dual BSD/GPL");
51
52 #define RTC_VERSION "1.10d"
53
54 static unsigned long epoch = 2000;
55
56 static struct semaphore i8042tregs;
57
58 static hp_sdc_irqhook hp_sdc_rtc_isr;
59
60 static struct fasync_struct *hp_sdc_rtc_async_queue;
61
62 static DECLARE_WAIT_QUEUE_HEAD(hp_sdc_rtc_wait);
63
64 static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
65 size_t count, loff_t *ppos);
66
67 static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file,
68 unsigned int cmd, unsigned long arg);
69
70 static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait);
71
72 static int hp_sdc_rtc_open(struct inode *inode, struct file *file);
73 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on);
74
75 static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off,
76 int count, int *eof, void *data);
77
78 static void hp_sdc_rtc_isr (int irq, void *dev_id,
79 uint8_t status, uint8_t data)
80 {
81 return;
82 }
83
84 static int hp_sdc_rtc_do_read_bbrtc (struct rtc_time *rtctm)
85 {
86 struct semaphore tsem;
87 hp_sdc_transaction t;
88 uint8_t tseq[91];
89 int i;
90
91 i = 0;
92 while (i < 91) {
93 tseq[i++] = HP_SDC_ACT_DATAREG |
94 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN;
95 tseq[i++] = 0x01; /* write i8042[0x70] */
96 tseq[i] = i / 7; /* BBRTC reg address */
97 i++;
98 tseq[i++] = HP_SDC_CMD_DO_RTCR; /* Trigger command */
99 tseq[i++] = 2; /* expect 1 stat/dat pair back. */
100 i++; i++; /* buffer for stat/dat pair */
101 }
102 tseq[84] |= HP_SDC_ACT_SEMAPHORE;
103 t.endidx = 91;
104 t.seq = tseq;
105 t.act.semaphore = &tsem;
106 init_MUTEX_LOCKED(&tsem);
107
108 if (hp_sdc_enqueue_transaction(&t)) return -1;
109
110 down_interruptible(&tsem); /* Put ourselves to sleep for results. */
111
112 /* Check for nonpresence of BBRTC */
113 if (!((tseq[83] | tseq[90] | tseq[69] | tseq[76] |
114 tseq[55] | tseq[62] | tseq[34] | tseq[41] |
115 tseq[20] | tseq[27] | tseq[6] | tseq[13]) & 0x0f))
116 return -1;
117
118 memset(rtctm, 0, sizeof(struct rtc_time));
119 rtctm->tm_year = (tseq[83] & 0x0f) + (tseq[90] & 0x0f) * 10;
120 rtctm->tm_mon = (tseq[69] & 0x0f) + (tseq[76] & 0x0f) * 10;
121 rtctm->tm_mday = (tseq[55] & 0x0f) + (tseq[62] & 0x0f) * 10;
122 rtctm->tm_wday = (tseq[48] & 0x0f);
123 rtctm->tm_hour = (tseq[34] & 0x0f) + (tseq[41] & 0x0f) * 10;
124 rtctm->tm_min = (tseq[20] & 0x0f) + (tseq[27] & 0x0f) * 10;
125 rtctm->tm_sec = (tseq[6] & 0x0f) + (tseq[13] & 0x0f) * 10;
126
127 return 0;
128 }
129
130 static int hp_sdc_rtc_read_bbrtc (struct rtc_time *rtctm)
131 {
132 struct rtc_time tm, tm_last;
133 int i = 0;
134
135 /* MSM-58321 has no read latch, so must read twice and compare. */
136
137 if (hp_sdc_rtc_do_read_bbrtc(&tm_last)) return -1;
138 if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1;
139
140 while (memcmp(&tm, &tm_last, sizeof(struct rtc_time))) {
141 if (i++ > 4) return -1;
142 memcpy(&tm_last, &tm, sizeof(struct rtc_time));
143 if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1;
144 }
145
146 memcpy(rtctm, &tm, sizeof(struct rtc_time));
147
148 return 0;
149 }
150
151
152 static int64_t hp_sdc_rtc_read_i8042timer (uint8_t loadcmd, int numreg)
153 {
154 hp_sdc_transaction t;
155 uint8_t tseq[26] = {
156 HP_SDC_ACT_PRECMD | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
157 0,
158 HP_SDC_CMD_READ_T1, 2, 0, 0,
159 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
160 HP_SDC_CMD_READ_T2, 2, 0, 0,
161 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
162 HP_SDC_CMD_READ_T3, 2, 0, 0,
163 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
164 HP_SDC_CMD_READ_T4, 2, 0, 0,
165 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
166 HP_SDC_CMD_READ_T5, 2, 0, 0
167 };
168
169 t.endidx = numreg * 5;
170
171 tseq[1] = loadcmd;
172 tseq[t.endidx - 4] |= HP_SDC_ACT_SEMAPHORE; /* numreg assumed > 1 */
173
174 t.seq = tseq;
175 t.act.semaphore = &i8042tregs;
176
177 down_interruptible(&i8042tregs); /* Sleep if output regs in use. */
178
179 if (hp_sdc_enqueue_transaction(&t)) return -1;
180
181 down_interruptible(&i8042tregs); /* Sleep until results come back. */
182 up(&i8042tregs);
183
184 return (tseq[5] |
185 ((uint64_t)(tseq[10]) << 8) | ((uint64_t)(tseq[15]) << 16) |
186 ((uint64_t)(tseq[20]) << 24) | ((uint64_t)(tseq[25]) << 32));
187 }
188
189
190 /* Read the i8042 real-time clock */
191 static inline int hp_sdc_rtc_read_rt(struct timeval *res) {
192 int64_t raw;
193 uint32_t tenms;
194 unsigned int days;
195
196 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_RT, 5);
197 if (raw < 0) return -1;
198
199 tenms = (uint32_t)raw & 0xffffff;
200 days = (unsigned int)(raw >> 24) & 0xffff;
201
202 res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
203 res->tv_sec = (time_t)(tenms / 100) + days * 86400;
204
205 return 0;
206 }
207
208
209 /* Read the i8042 fast handshake timer */
210 static inline int hp_sdc_rtc_read_fhs(struct timeval *res) {
211 int64_t raw;
212 unsigned int tenms;
213
214 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_FHS, 2);
215 if (raw < 0) return -1;
216
217 tenms = (unsigned int)raw & 0xffff;
218
219 res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
220 res->tv_sec = (time_t)(tenms / 100);
221
222 return 0;
223 }
224
225
226 /* Read the i8042 match timer (a.k.a. alarm) */
227 static inline int hp_sdc_rtc_read_mt(struct timeval *res) {
228 int64_t raw;
229 uint32_t tenms;
230
231 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_MT, 3);
232 if (raw < 0) return -1;
233
234 tenms = (uint32_t)raw & 0xffffff;
235
236 res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
237 res->tv_sec = (time_t)(tenms / 100);
238
239 return 0;
240 }
241
242
243 /* Read the i8042 delay timer */
244 static inline int hp_sdc_rtc_read_dt(struct timeval *res) {
245 int64_t raw;
246 uint32_t tenms;
247
248 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_DT, 3);
249 if (raw < 0) return -1;
250
251 tenms = (uint32_t)raw & 0xffffff;
252
253 res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
254 res->tv_sec = (time_t)(tenms / 100);
255
256 return 0;
257 }
258
259
260 /* Read the i8042 cycle timer (a.k.a. periodic) */
261 static inline int hp_sdc_rtc_read_ct(struct timeval *res) {
262 int64_t raw;
263 uint32_t tenms;
264
265 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_CT, 3);
266 if (raw < 0) return -1;
267
268 tenms = (uint32_t)raw & 0xffffff;
269
270 res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
271 res->tv_sec = (time_t)(tenms / 100);
272
273 return 0;
274 }
275
276
277 /* Set the i8042 real-time clock */
278 static int hp_sdc_rtc_set_rt (struct timeval *setto)
279 {
280 uint32_t tenms;
281 unsigned int days;
282 hp_sdc_transaction t;
283 uint8_t tseq[11] = {
284 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
285 HP_SDC_CMD_SET_RTMS, 3, 0, 0, 0,
286 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
287 HP_SDC_CMD_SET_RTD, 2, 0, 0
288 };
289
290 t.endidx = 10;
291
292 if (0xffff < setto->tv_sec / 86400) return -1;
293 days = setto->tv_sec / 86400;
294 if (0xffff < setto->tv_usec / 1000000 / 86400) return -1;
295 days += ((setto->tv_sec % 86400) + setto->tv_usec / 1000000) / 86400;
296 if (days > 0xffff) return -1;
297
298 if (0xffffff < setto->tv_sec) return -1;
299 tenms = setto->tv_sec * 100;
300 if (0xffffff < setto->tv_usec / 10000) return -1;
301 tenms += setto->tv_usec / 10000;
302 if (tenms > 0xffffff) return -1;
303
304 tseq[3] = (uint8_t)(tenms & 0xff);
305 tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
306 tseq[5] = (uint8_t)((tenms >> 16) & 0xff);
307
308 tseq[9] = (uint8_t)(days & 0xff);
309 tseq[10] = (uint8_t)((days >> 8) & 0xff);
310
311 t.seq = tseq;
312
313 if (hp_sdc_enqueue_transaction(&t)) return -1;
314 return 0;
315 }
316
317 /* Set the i8042 fast handshake timer */
318 static int hp_sdc_rtc_set_fhs (struct timeval *setto)
319 {
320 uint32_t tenms;
321 hp_sdc_transaction t;
322 uint8_t tseq[5] = {
323 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
324 HP_SDC_CMD_SET_FHS, 2, 0, 0
325 };
326
327 t.endidx = 4;
328
329 if (0xffff < setto->tv_sec) return -1;
330 tenms = setto->tv_sec * 100;
331 if (0xffff < setto->tv_usec / 10000) return -1;
332 tenms += setto->tv_usec / 10000;
333 if (tenms > 0xffff) return -1;
334
335 tseq[3] = (uint8_t)(tenms & 0xff);
336 tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
337
338 t.seq = tseq;
339
340 if (hp_sdc_enqueue_transaction(&t)) return -1;
341 return 0;
342 }
343
344
345 /* Set the i8042 match timer (a.k.a. alarm) */
346 #define hp_sdc_rtc_set_mt (setto) \
347 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_MT)
348
349 /* Set the i8042 delay timer */
350 #define hp_sdc_rtc_set_dt (setto) \
351 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_DT)
352
353 /* Set the i8042 cycle timer (a.k.a. periodic) */
354 #define hp_sdc_rtc_set_ct (setto) \
355 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_CT)
356
357 /* Set one of the i8042 3-byte wide timers */
358 static int hp_sdc_rtc_set_i8042timer (struct timeval *setto, uint8_t setcmd)
359 {
360 uint32_t tenms;
361 hp_sdc_transaction t;
362 uint8_t tseq[6] = {
363 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
364 0, 3, 0, 0, 0
365 };
366
367 t.endidx = 6;
368
369 if (0xffffff < setto->tv_sec) return -1;
370 tenms = setto->tv_sec * 100;
371 if (0xffffff < setto->tv_usec / 10000) return -1;
372 tenms += setto->tv_usec / 10000;
373 if (tenms > 0xffffff) return -1;
374
375 tseq[1] = setcmd;
376 tseq[3] = (uint8_t)(tenms & 0xff);
377 tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
378 tseq[5] = (uint8_t)((tenms >> 16) & 0xff);
379
380 t.seq = tseq;
381
382 if (hp_sdc_enqueue_transaction(&t)) {
383 return -1;
384 }
385 return 0;
386 }
387
388 static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
389 size_t count, loff_t *ppos) {
390 ssize_t retval;
391
392 if (count < sizeof(unsigned long))
393 return -EINVAL;
394
395 retval = put_user(68, (unsigned long __user *)buf);
396 return retval;
397 }
398
399 static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait)
400 {
401 unsigned long l;
402
403 l = 0;
404 if (l != 0)
405 return POLLIN | POLLRDNORM;
406 return 0;
407 }
408
409 static int hp_sdc_rtc_open(struct inode *inode, struct file *file)
410 {
411 return 0;
412 }
413
414 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on)
415 {
416 return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue);
417 }
418
419 static int hp_sdc_rtc_proc_output (char *buf)
420 {
421 #define YN(bit) ("no")
422 #define NY(bit) ("yes")
423 char *p;
424 struct rtc_time tm;
425 struct timeval tv;
426
427 memset(&tm, 0, sizeof(struct rtc_time));
428
429 p = buf;
430
431 if (hp_sdc_rtc_read_bbrtc(&tm)) {
432 p += sprintf(p, "BBRTC\t\t: READ FAILED!\n");
433 } else {
434 p += sprintf(p,
435 "rtc_time\t: %02d:%02d:%02d\n"
436 "rtc_date\t: %04d-%02d-%02d\n"
437 "rtc_epoch\t: %04lu\n",
438 tm.tm_hour, tm.tm_min, tm.tm_sec,
439 tm.tm_year + 1900, tm.tm_mon + 1,
440 tm.tm_mday, epoch);
441 }
442
443 if (hp_sdc_rtc_read_rt(&tv)) {
444 p += sprintf(p, "i8042 rtc\t: READ FAILED!\n");
445 } else {
446 p += sprintf(p, "i8042 rtc\t: %ld.%02d seconds\n",
447 tv.tv_sec, (int)tv.tv_usec/1000);
448 }
449
450 if (hp_sdc_rtc_read_fhs(&tv)) {
451 p += sprintf(p, "handshake\t: READ FAILED!\n");
452 } else {
453 p += sprintf(p, "handshake\t: %ld.%02d seconds\n",
454 tv.tv_sec, (int)tv.tv_usec/1000);
455 }
456
457 if (hp_sdc_rtc_read_mt(&tv)) {
458 p += sprintf(p, "alarm\t\t: READ FAILED!\n");
459 } else {
460 p += sprintf(p, "alarm\t\t: %ld.%02d seconds\n",
461 tv.tv_sec, (int)tv.tv_usec/1000);
462 }
463
464 if (hp_sdc_rtc_read_dt(&tv)) {
465 p += sprintf(p, "delay\t\t: READ FAILED!\n");
466 } else {
467 p += sprintf(p, "delay\t\t: %ld.%02d seconds\n",
468 tv.tv_sec, (int)tv.tv_usec/1000);
469 }
470
471 if (hp_sdc_rtc_read_ct(&tv)) {
472 p += sprintf(p, "periodic\t: READ FAILED!\n");
473 } else {
474 p += sprintf(p, "periodic\t: %ld.%02d seconds\n",
475 tv.tv_sec, (int)tv.tv_usec/1000);
476 }
477
478 p += sprintf(p,
479 "DST_enable\t: %s\n"
480 "BCD\t\t: %s\n"
481 "24hr\t\t: %s\n"
482 "square_wave\t: %s\n"
483 "alarm_IRQ\t: %s\n"
484 "update_IRQ\t: %s\n"
485 "periodic_IRQ\t: %s\n"
486 "periodic_freq\t: %ld\n"
487 "batt_status\t: %s\n",
488 YN(RTC_DST_EN),
489 NY(RTC_DM_BINARY),
490 YN(RTC_24H),
491 YN(RTC_SQWE),
492 YN(RTC_AIE),
493 YN(RTC_UIE),
494 YN(RTC_PIE),
495 1UL,
496 1 ? "okay" : "dead");
497
498 return p - buf;
499 #undef YN
500 #undef NY
501 }
502
503 static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off,
504 int count, int *eof, void *data)
505 {
506 int len = hp_sdc_rtc_proc_output (page);
507 if (len <= off+count) *eof = 1;
508 *start = page + off;
509 len -= off;
510 if (len>count) len = count;
511 if (len<0) len = 0;
512 return len;
513 }
514
515 static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file,
516 unsigned int cmd, unsigned long arg)
517 {
518 #if 1
519 return -EINVAL;
520 #else
521
522 struct rtc_time wtime;
523 struct timeval ttime;
524 int use_wtime = 0;
525
526 /* This needs major work. */
527
528 switch (cmd) {
529
530 case RTC_AIE_OFF: /* Mask alarm int. enab. bit */
531 case RTC_AIE_ON: /* Allow alarm interrupts. */
532 case RTC_PIE_OFF: /* Mask periodic int. enab. bit */
533 case RTC_PIE_ON: /* Allow periodic ints */
534 case RTC_UIE_ON: /* Allow ints for RTC updates. */
535 case RTC_UIE_OFF: /* Allow ints for RTC updates. */
536 {
537 /* We cannot mask individual user timers and we
538 cannot tell them apart when they occur, so it
539 would be disingenuous to succeed these IOCTLs */
540 return -EINVAL;
541 }
542 case RTC_ALM_READ: /* Read the present alarm time */
543 {
544 if (hp_sdc_rtc_read_mt(&ttime)) return -EFAULT;
545 if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
546
547 wtime.tm_hour = ttime.tv_sec / 3600; ttime.tv_sec %= 3600;
548 wtime.tm_min = ttime.tv_sec / 60; ttime.tv_sec %= 60;
549 wtime.tm_sec = ttime.tv_sec;
550
551 break;
552 }
553 case RTC_IRQP_READ: /* Read the periodic IRQ rate. */
554 {
555 return put_user(hp_sdc_rtc_freq, (unsigned long *)arg);
556 }
557 case RTC_IRQP_SET: /* Set periodic IRQ rate. */
558 {
559 /*
560 * The max we can do is 100Hz.
561 */
562
563 if ((arg < 1) || (arg > 100)) return -EINVAL;
564 ttime.tv_sec = 0;
565 ttime.tv_usec = 1000000 / arg;
566 if (hp_sdc_rtc_set_ct(&ttime)) return -EFAULT;
567 hp_sdc_rtc_freq = arg;
568 return 0;
569 }
570 case RTC_ALM_SET: /* Store a time into the alarm */
571 {
572 /*
573 * This expects a struct hp_sdc_rtc_time. Writing 0xff means
574 * "don't care" or "match all" for PC timers. The HP SDC
575 * does not support that perk, but it could be emulated fairly
576 * easily. Only the tm_hour, tm_min and tm_sec are used.
577 * We could do it with 10ms accuracy with the HP SDC, if the
578 * rtc interface left us a way to do that.
579 */
580 struct hp_sdc_rtc_time alm_tm;
581
582 if (copy_from_user(&alm_tm, (struct hp_sdc_rtc_time*)arg,
583 sizeof(struct hp_sdc_rtc_time)))
584 return -EFAULT;
585
586 if (alm_tm.tm_hour > 23) return -EINVAL;
587 if (alm_tm.tm_min > 59) return -EINVAL;
588 if (alm_tm.tm_sec > 59) return -EINVAL;
589
590 ttime.sec = alm_tm.tm_hour * 3600 +
591 alm_tm.tm_min * 60 + alm_tm.tm_sec;
592 ttime.usec = 0;
593 if (hp_sdc_rtc_set_mt(&ttime)) return -EFAULT;
594 return 0;
595 }
596 case RTC_RD_TIME: /* Read the time/date from RTC */
597 {
598 if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
599 break;
600 }
601 case RTC_SET_TIME: /* Set the RTC */
602 {
603 struct rtc_time hp_sdc_rtc_tm;
604 unsigned char mon, day, hrs, min, sec, leap_yr;
605 unsigned int yrs;
606
607 if (!capable(CAP_SYS_TIME))
608 return -EACCES;
609 if (copy_from_user(&hp_sdc_rtc_tm, (struct rtc_time *)arg,
610 sizeof(struct rtc_time)))
611 return -EFAULT;
612
613 yrs = hp_sdc_rtc_tm.tm_year + 1900;
614 mon = hp_sdc_rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
615 day = hp_sdc_rtc_tm.tm_mday;
616 hrs = hp_sdc_rtc_tm.tm_hour;
617 min = hp_sdc_rtc_tm.tm_min;
618 sec = hp_sdc_rtc_tm.tm_sec;
619
620 if (yrs < 1970)
621 return -EINVAL;
622
623 leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
624
625 if ((mon > 12) || (day == 0))
626 return -EINVAL;
627 if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
628 return -EINVAL;
629 if ((hrs >= 24) || (min >= 60) || (sec >= 60))
630 return -EINVAL;
631
632 if ((yrs -= eH) > 255) /* They are unsigned */
633 return -EINVAL;
634
635
636 return 0;
637 }
638 case RTC_EPOCH_READ: /* Read the epoch. */
639 {
640 return put_user (epoch, (unsigned long *)arg);
641 }
642 case RTC_EPOCH_SET: /* Set the epoch. */
643 {
644 /*
645 * There were no RTC clocks before 1900.
646 */
647 if (arg < 1900)
648 return -EINVAL;
649 if (!capable(CAP_SYS_TIME))
650 return -EACCES;
651
652 epoch = arg;
653 return 0;
654 }
655 default:
656 return -EINVAL;
657 }
658 return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
659 #endif
660 }
661
662 static const struct file_operations hp_sdc_rtc_fops = {
663 .owner = THIS_MODULE,
664 .llseek = no_llseek,
665 .read = hp_sdc_rtc_read,
666 .poll = hp_sdc_rtc_poll,
667 .ioctl = hp_sdc_rtc_ioctl,
668 .open = hp_sdc_rtc_open,
669 .fasync = hp_sdc_rtc_fasync,
670 };
671
672 static struct miscdevice hp_sdc_rtc_dev = {
673 .minor = RTC_MINOR,
674 .name = "rtc_HIL",
675 .fops = &hp_sdc_rtc_fops
676 };
677
678 static int __init hp_sdc_rtc_init(void)
679 {
680 int ret;
681
682 #ifdef __mc68000__
683 if (!MACH_IS_HP300)
684 return -ENODEV;
685 #endif
686
687 init_MUTEX(&i8042tregs);
688
689 if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr)))
690 return ret;
691 if (misc_register(&hp_sdc_rtc_dev) != 0)
692 printk(KERN_INFO "Could not register misc. dev for i8042 rtc\n");
693
694 create_proc_read_entry ("driver/rtc", 0, NULL,
695 hp_sdc_rtc_read_proc, NULL);
696
697 printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support loaded "
698 "(RTC v " RTC_VERSION ")\n");
699
700 return 0;
701 }
702
703 static void __exit hp_sdc_rtc_exit(void)
704 {
705 remove_proc_entry ("driver/rtc", NULL);
706 misc_deregister(&hp_sdc_rtc_dev);
707 hp_sdc_release_timer_irq(hp_sdc_rtc_isr);
708 printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support unloaded\n");
709 }
710
711 module_init(hp_sdc_rtc_init);
712 module_exit(hp_sdc_rtc_exit);
AMDTP streaming driver for the Linux FireWire stack (Juju)