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/smp_lock.h> 47 #include <linux/semaphore.h> 48 49 MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); 50 MODULE_DESCRIPTION("HP i8042 SDC + MSM-58321 RTC Driver"); 51 MODULE_LICENSE("Dual BSD/GPL"); 52 53 #define RTC_VERSION "1.10d" 54 55 static unsigned long epoch = 2000; 56 57 static struct semaphore i8042tregs; 58 59 static hp_sdc_irqhook hp_sdc_rtc_isr; 60 61 static struct fasync_struct *hp_sdc_rtc_async_queue; 62 63 static DECLARE_WAIT_QUEUE_HEAD(hp_sdc_rtc_wait); 64 65 static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf, 66 size_t count, loff_t *ppos); 67 68 static long hp_sdc_rtc_unlocked_ioctl(struct file *file, 69 unsigned int cmd, unsigned long arg); 70 71 static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait); 72 73 static int hp_sdc_rtc_open(struct inode *inode, struct file *file); 74 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on); 75 76 static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off, 77 int count, int *eof, void *data); 78 79 static void hp_sdc_rtc_isr (int irq, void *dev_id, 80 uint8_t status, uint8_t data) 81 { 82 return; 83 } 84 85 static int hp_sdc_rtc_do_read_bbrtc (struct rtc_time *rtctm) 86 { 87 struct semaphore tsem; 88 hp_sdc_transaction t; 89 uint8_t tseq[91]; 90 int i; 91 92 i = 0; 93 while (i < 91) { 94 tseq[i++] = HP_SDC_ACT_DATAREG | 95 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN; 96 tseq[i++] = 0x01; /* write i8042[0x70] */ 97 tseq[i] = i / 7; /* BBRTC reg address */ 98 i++; 99 tseq[i++] = HP_SDC_CMD_DO_RTCR; /* Trigger command */ 100 tseq[i++] = 2; /* expect 1 stat/dat pair back. */ 101 i++; i++; /* buffer for stat/dat pair */ 102 } 103 tseq[84] |= HP_SDC_ACT_SEMAPHORE; 104 t.endidx = 91; 105 t.seq = tseq; 106 t.act.semaphore = &tsem; 107 init_MUTEX_LOCKED(&tsem); 108 109 if (hp_sdc_enqueue_transaction(&t)) return -1; 110 111 down_interruptible(&tsem); /* Put ourselves to sleep for results. */ 112 113 /* Check for nonpresence of BBRTC */ 114 if (!((tseq[83] | tseq[90] | tseq[69] | tseq[76] | 115 tseq[55] | tseq[62] | tseq[34] | tseq[41] | 116 tseq[20] | tseq[27] | tseq[6] | tseq[13]) & 0x0f)) 117 return -1; 118 119 memset(rtctm, 0, sizeof(struct rtc_time)); 120 rtctm->tm_year = (tseq[83] & 0x0f) + (tseq[90] & 0x0f) * 10; 121 rtctm->tm_mon = (tseq[69] & 0x0f) + (tseq[76] & 0x0f) * 10; 122 rtctm->tm_mday = (tseq[55] & 0x0f) + (tseq[62] & 0x0f) * 10; 123 rtctm->tm_wday = (tseq[48] & 0x0f); 124 rtctm->tm_hour = (tseq[34] & 0x0f) + (tseq[41] & 0x0f) * 10; 125 rtctm->tm_min = (tseq[20] & 0x0f) + (tseq[27] & 0x0f) * 10; 126 rtctm->tm_sec = (tseq[6] & 0x0f) + (tseq[13] & 0x0f) * 10; 127 128 return 0; 129 } 130 131 static int hp_sdc_rtc_read_bbrtc (struct rtc_time *rtctm) 132 { 133 struct rtc_time tm, tm_last; 134 int i = 0; 135 136 /* MSM-58321 has no read latch, so must read twice and compare. */ 137 138 if (hp_sdc_rtc_do_read_bbrtc(&tm_last)) return -1; 139 if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1; 140 141 while (memcmp(&tm, &tm_last, sizeof(struct rtc_time))) { 142 if (i++ > 4) return -1; 143 memcpy(&tm_last, &tm, sizeof(struct rtc_time)); 144 if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1; 145 } 146 147 memcpy(rtctm, &tm, sizeof(struct rtc_time)); 148 149 return 0; 150 } 151 152 153 static int64_t hp_sdc_rtc_read_i8042timer (uint8_t loadcmd, int numreg) 154 { 155 hp_sdc_transaction t; 156 uint8_t tseq[26] = { 157 HP_SDC_ACT_PRECMD | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 158 0, 159 HP_SDC_CMD_READ_T1, 2, 0, 0, 160 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 161 HP_SDC_CMD_READ_T2, 2, 0, 0, 162 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 163 HP_SDC_CMD_READ_T3, 2, 0, 0, 164 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 165 HP_SDC_CMD_READ_T4, 2, 0, 0, 166 HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 167 HP_SDC_CMD_READ_T5, 2, 0, 0 168 }; 169 170 t.endidx = numreg * 5; 171 172 tseq[1] = loadcmd; 173 tseq[t.endidx - 4] |= HP_SDC_ACT_SEMAPHORE; /* numreg assumed > 1 */ 174 175 t.seq = tseq; 176 t.act.semaphore = &i8042tregs; 177 178 down_interruptible(&i8042tregs); /* Sleep if output regs in use. */ 179 180 if (hp_sdc_enqueue_transaction(&t)) return -1; 181 182 down_interruptible(&i8042tregs); /* Sleep until results come back. */ 183 up(&i8042tregs); 184 185 return (tseq[5] | 186 ((uint64_t)(tseq[10]) << 8) | ((uint64_t)(tseq[15]) << 16) | 187 ((uint64_t)(tseq[20]) << 24) | ((uint64_t)(tseq[25]) << 32)); 188 } 189 190 191 /* Read the i8042 real-time clock */ 192 static inline int hp_sdc_rtc_read_rt(struct timeval *res) { 193 int64_t raw; 194 uint32_t tenms; 195 unsigned int days; 196 197 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_RT, 5); 198 if (raw < 0) return -1; 199 200 tenms = (uint32_t)raw & 0xffffff; 201 days = (unsigned int)(raw >> 24) & 0xffff; 202 203 res->tv_usec = (suseconds_t)(tenms % 100) * 10000; 204 res->tv_sec = (time_t)(tenms / 100) + days * 86400; 205 206 return 0; 207 } 208 209 210 /* Read the i8042 fast handshake timer */ 211 static inline int hp_sdc_rtc_read_fhs(struct timeval *res) { 212 int64_t raw; 213 unsigned int tenms; 214 215 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_FHS, 2); 216 if (raw < 0) return -1; 217 218 tenms = (unsigned int)raw & 0xffff; 219 220 res->tv_usec = (suseconds_t)(tenms % 100) * 10000; 221 res->tv_sec = (time_t)(tenms / 100); 222 223 return 0; 224 } 225 226 227 /* Read the i8042 match timer (a.k.a. alarm) */ 228 static inline int hp_sdc_rtc_read_mt(struct timeval *res) { 229 int64_t raw; 230 uint32_t tenms; 231 232 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_MT, 3); 233 if (raw < 0) return -1; 234 235 tenms = (uint32_t)raw & 0xffffff; 236 237 res->tv_usec = (suseconds_t)(tenms % 100) * 10000; 238 res->tv_sec = (time_t)(tenms / 100); 239 240 return 0; 241 } 242 243 244 /* Read the i8042 delay timer */ 245 static inline int hp_sdc_rtc_read_dt(struct timeval *res) { 246 int64_t raw; 247 uint32_t tenms; 248 249 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_DT, 3); 250 if (raw < 0) return -1; 251 252 tenms = (uint32_t)raw & 0xffffff; 253 254 res->tv_usec = (suseconds_t)(tenms % 100) * 10000; 255 res->tv_sec = (time_t)(tenms / 100); 256 257 return 0; 258 } 259 260 261 /* Read the i8042 cycle timer (a.k.a. periodic) */ 262 static inline int hp_sdc_rtc_read_ct(struct timeval *res) { 263 int64_t raw; 264 uint32_t tenms; 265 266 raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_CT, 3); 267 if (raw < 0) return -1; 268 269 tenms = (uint32_t)raw & 0xffffff; 270 271 res->tv_usec = (suseconds_t)(tenms % 100) * 10000; 272 res->tv_sec = (time_t)(tenms / 100); 273 274 return 0; 275 } 276 277 278 /* Set the i8042 real-time clock */ 279 static int hp_sdc_rtc_set_rt (struct timeval *setto) 280 { 281 uint32_t tenms; 282 unsigned int days; 283 hp_sdc_transaction t; 284 uint8_t tseq[11] = { 285 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT, 286 HP_SDC_CMD_SET_RTMS, 3, 0, 0, 0, 287 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT, 288 HP_SDC_CMD_SET_RTD, 2, 0, 0 289 }; 290 291 t.endidx = 10; 292 293 if (0xffff < setto->tv_sec / 86400) return -1; 294 days = setto->tv_sec / 86400; 295 if (0xffff < setto->tv_usec / 1000000 / 86400) return -1; 296 days += ((setto->tv_sec % 86400) + setto->tv_usec / 1000000) / 86400; 297 if (days > 0xffff) return -1; 298 299 if (0xffffff < setto->tv_sec) return -1; 300 tenms = setto->tv_sec * 100; 301 if (0xffffff < setto->tv_usec / 10000) return -1; 302 tenms += setto->tv_usec / 10000; 303 if (tenms > 0xffffff) return -1; 304 305 tseq[3] = (uint8_t)(tenms & 0xff); 306 tseq[4] = (uint8_t)((tenms >> 8) & 0xff); 307 tseq[5] = (uint8_t)((tenms >> 16) & 0xff); 308 309 tseq[9] = (uint8_t)(days & 0xff); 310 tseq[10] = (uint8_t)((days >> 8) & 0xff); 311 312 t.seq = tseq; 313 314 if (hp_sdc_enqueue_transaction(&t)) return -1; 315 return 0; 316 } 317 318 /* Set the i8042 fast handshake timer */ 319 static int hp_sdc_rtc_set_fhs (struct timeval *setto) 320 { 321 uint32_t tenms; 322 hp_sdc_transaction t; 323 uint8_t tseq[5] = { 324 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT, 325 HP_SDC_CMD_SET_FHS, 2, 0, 0 326 }; 327 328 t.endidx = 4; 329 330 if (0xffff < setto->tv_sec) return -1; 331 tenms = setto->tv_sec * 100; 332 if (0xffff < setto->tv_usec / 10000) return -1; 333 tenms += setto->tv_usec / 10000; 334 if (tenms > 0xffff) return -1; 335 336 tseq[3] = (uint8_t)(tenms & 0xff); 337 tseq[4] = (uint8_t)((tenms >> 8) & 0xff); 338 339 t.seq = tseq; 340 341 if (hp_sdc_enqueue_transaction(&t)) return -1; 342 return 0; 343 } 344 345 346 /* Set the i8042 match timer (a.k.a. alarm) */ 347 #define hp_sdc_rtc_set_mt (setto) \ 348 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_MT) 349 350 /* Set the i8042 delay timer */ 351 #define hp_sdc_rtc_set_dt (setto) \ 352 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_DT) 353 354 /* Set the i8042 cycle timer (a.k.a. periodic) */ 355 #define hp_sdc_rtc_set_ct (setto) \ 356 hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_CT) 357 358 /* Set one of the i8042 3-byte wide timers */ 359 static int hp_sdc_rtc_set_i8042timer (struct timeval *setto, uint8_t setcmd) 360 { 361 uint32_t tenms; 362 hp_sdc_transaction t; 363 uint8_t tseq[6] = { 364 HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT, 365 0, 3, 0, 0, 0 366 }; 367 368 t.endidx = 6; 369 370 if (0xffffff < setto->tv_sec) return -1; 371 tenms = setto->tv_sec * 100; 372 if (0xffffff < setto->tv_usec / 10000) return -1; 373 tenms += setto->tv_usec / 10000; 374 if (tenms > 0xffffff) return -1; 375 376 tseq[1] = setcmd; 377 tseq[3] = (uint8_t)(tenms & 0xff); 378 tseq[4] = (uint8_t)((tenms >> 8) & 0xff); 379 tseq[5] = (uint8_t)((tenms >> 16) & 0xff); 380 381 t.seq = tseq; 382 383 if (hp_sdc_enqueue_transaction(&t)) { 384 return -1; 385 } 386 return 0; 387 } 388 389 static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf, 390 size_t count, loff_t *ppos) { 391 ssize_t retval; 392 393 if (count < sizeof(unsigned long)) 394 return -EINVAL; 395 396 retval = put_user(68, (unsigned long __user *)buf); 397 return retval; 398 } 399 400 static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait) 401 { 402 unsigned long l; 403 404 l = 0; 405 if (l != 0) 406 return POLLIN | POLLRDNORM; 407 return 0; 408 } 409 410 static int hp_sdc_rtc_open(struct inode *inode, struct file *file) 411 { 412 return 0; 413 } 414 415 static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on) 416 { 417 return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue); 418 } 419 420 static int hp_sdc_rtc_proc_output (char *buf) 421 { 422 #define YN(bit) ("no") 423 #define NY(bit) ("yes") 424 char *p; 425 struct rtc_time tm; 426 struct timeval tv; 427 428 memset(&tm, 0, sizeof(struct rtc_time)); 429 430 p = buf; 431 432 if (hp_sdc_rtc_read_bbrtc(&tm)) { 433 p += sprintf(p, "BBRTC\t\t: READ FAILED!\n"); 434 } else { 435 p += sprintf(p, 436 "rtc_time\t: %02d:%02d:%02d\n" 437 "rtc_date\t: %04d-%02d-%02d\n" 438 "rtc_epoch\t: %04lu\n", 439 tm.tm_hour, tm.tm_min, tm.tm_sec, 440 tm.tm_year + 1900, tm.tm_mon + 1, 441 tm.tm_mday, epoch); 442 } 443 444 if (hp_sdc_rtc_read_rt(&tv)) { 445 p += sprintf(p, "i8042 rtc\t: READ FAILED!\n"); 446 } else { 447 p += sprintf(p, "i8042 rtc\t: %ld.%02d seconds\n", 448 tv.tv_sec, (int)tv.tv_usec/1000); 449 } 450 451 if (hp_sdc_rtc_read_fhs(&tv)) { 452 p += sprintf(p, "handshake\t: READ FAILED!\n"); 453 } else { 454 p += sprintf(p, "handshake\t: %ld.%02d seconds\n", 455 tv.tv_sec, (int)tv.tv_usec/1000); 456 } 457 458 if (hp_sdc_rtc_read_mt(&tv)) { 459 p += sprintf(p, "alarm\t\t: READ FAILED!\n"); 460 } else { 461 p += sprintf(p, "alarm\t\t: %ld.%02d seconds\n", 462 tv.tv_sec, (int)tv.tv_usec/1000); 463 } 464 465 if (hp_sdc_rtc_read_dt(&tv)) { 466 p += sprintf(p, "delay\t\t: READ FAILED!\n"); 467 } else { 468 p += sprintf(p, "delay\t\t: %ld.%02d seconds\n", 469 tv.tv_sec, (int)tv.tv_usec/1000); 470 } 471 472 if (hp_sdc_rtc_read_ct(&tv)) { 473 p += sprintf(p, "periodic\t: READ FAILED!\n"); 474 } else { 475 p += sprintf(p, "periodic\t: %ld.%02d seconds\n", 476 tv.tv_sec, (int)tv.tv_usec/1000); 477 } 478 479 p += sprintf(p, 480 "DST_enable\t: %s\n" 481 "BCD\t\t: %s\n" 482 "24hr\t\t: %s\n" 483 "square_wave\t: %s\n" 484 "alarm_IRQ\t: %s\n" 485 "update_IRQ\t: %s\n" 486 "periodic_IRQ\t: %s\n" 487 "periodic_freq\t: %ld\n" 488 "batt_status\t: %s\n", 489 YN(RTC_DST_EN), 490 NY(RTC_DM_BINARY), 491 YN(RTC_24H), 492 YN(RTC_SQWE), 493 YN(RTC_AIE), 494 YN(RTC_UIE), 495 YN(RTC_PIE), 496 1UL, 497 1 ? "okay" : "dead"); 498 499 return p - buf; 500 #undef YN 501 #undef NY 502 } 503 504 static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off, 505 int count, int *eof, void *data) 506 { 507 int len = hp_sdc_rtc_proc_output (page); 508 if (len <= off+count) *eof = 1; 509 *start = page + off; 510 len -= off; 511 if (len>count) len = count; 512 if (len<0) len = 0; 513 return len; 514 } 515 516 static int hp_sdc_rtc_ioctl(struct file *file, 517 unsigned int cmd, unsigned long arg) 518 { 519 #if 1 520 return -EINVAL; 521 #else 522 523 struct rtc_time wtime; 524 struct timeval ttime; 525 int use_wtime = 0; 526 527 /* This needs major work. */ 528 529 switch (cmd) { 530 531 case RTC_AIE_OFF: /* Mask alarm int. enab. bit */ 532 case RTC_AIE_ON: /* Allow alarm interrupts. */ 533 case RTC_PIE_OFF: /* Mask periodic int. enab. bit */ 534 case RTC_PIE_ON: /* Allow periodic ints */ 535 case RTC_UIE_ON: /* Allow ints for RTC updates. */ 536 case RTC_UIE_OFF: /* Allow ints for RTC updates. */ 537 { 538 /* We cannot mask individual user timers and we 539 cannot tell them apart when they occur, so it 540 would be disingenuous to succeed these IOCTLs */ 541 return -EINVAL; 542 } 543 case RTC_ALM_READ: /* Read the present alarm time */ 544 { 545 if (hp_sdc_rtc_read_mt(&ttime)) return -EFAULT; 546 if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT; 547 548 wtime.tm_hour = ttime.tv_sec / 3600; ttime.tv_sec %= 3600; 549 wtime.tm_min = ttime.tv_sec / 60; ttime.tv_sec %= 60; 550 wtime.tm_sec = ttime.tv_sec; 551 552 break; 553 } 554 case RTC_IRQP_READ: /* Read the periodic IRQ rate. */ 555 { 556 return put_user(hp_sdc_rtc_freq, (unsigned long *)arg); 557 } 558 case RTC_IRQP_SET: /* Set periodic IRQ rate. */ 559 { 560 /* 561 * The max we can do is 100Hz. 562 */ 563 564 if ((arg < 1) || (arg > 100)) return -EINVAL; 565 ttime.tv_sec = 0; 566 ttime.tv_usec = 1000000 / arg; 567 if (hp_sdc_rtc_set_ct(&ttime)) return -EFAULT; 568 hp_sdc_rtc_freq = arg; 569 return 0; 570 } 571 case RTC_ALM_SET: /* Store a time into the alarm */ 572 { 573 /* 574 * This expects a struct hp_sdc_rtc_time. Writing 0xff means 575 * "don't care" or "match all" for PC timers. The HP SDC 576 * does not support that perk, but it could be emulated fairly 577 * easily. Only the tm_hour, tm_min and tm_sec are used. 578 * We could do it with 10ms accuracy with the HP SDC, if the 579 * rtc interface left us a way to do that. 580 */ 581 struct hp_sdc_rtc_time alm_tm; 582 583 if (copy_from_user(&alm_tm, (struct hp_sdc_rtc_time*)arg, 584 sizeof(struct hp_sdc_rtc_time))) 585 return -EFAULT; 586 587 if (alm_tm.tm_hour > 23) return -EINVAL; 588 if (alm_tm.tm_min > 59) return -EINVAL; 589 if (alm_tm.tm_sec > 59) return -EINVAL; 590 591 ttime.sec = alm_tm.tm_hour * 3600 + 592 alm_tm.tm_min * 60 + alm_tm.tm_sec; 593 ttime.usec = 0; 594 if (hp_sdc_rtc_set_mt(&ttime)) return -EFAULT; 595 return 0; 596 } 597 case RTC_RD_TIME: /* Read the time/date from RTC */ 598 { 599 if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT; 600 break; 601 } 602 case RTC_SET_TIME: /* Set the RTC */ 603 { 604 struct rtc_time hp_sdc_rtc_tm; 605 unsigned char mon, day, hrs, min, sec, leap_yr; 606 unsigned int yrs; 607 608 if (!capable(CAP_SYS_TIME)) 609 return -EACCES; 610 if (copy_from_user(&hp_sdc_rtc_tm, (struct rtc_time *)arg, 611 sizeof(struct rtc_time))) 612 return -EFAULT; 613 614 yrs = hp_sdc_rtc_tm.tm_year + 1900; 615 mon = hp_sdc_rtc_tm.tm_mon + 1; /* tm_mon starts at zero */ 616 day = hp_sdc_rtc_tm.tm_mday; 617 hrs = hp_sdc_rtc_tm.tm_hour; 618 min = hp_sdc_rtc_tm.tm_min; 619 sec = hp_sdc_rtc_tm.tm_sec; 620 621 if (yrs < 1970) 622 return -EINVAL; 623 624 leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400)); 625 626 if ((mon > 12) || (day == 0)) 627 return -EINVAL; 628 if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr))) 629 return -EINVAL; 630 if ((hrs >= 24) || (min >= 60) || (sec >= 60)) 631 return -EINVAL; 632 633 if ((yrs -= eH) > 255) /* They are unsigned */ 634 return -EINVAL; 635 636 637 return 0; 638 } 639 case RTC_EPOCH_READ: /* Read the epoch. */ 640 { 641 return put_user (epoch, (unsigned long *)arg); 642 } 643 case RTC_EPOCH_SET: /* Set the epoch. */ 644 { 645 /* 646 * There were no RTC clocks before 1900. 647 */ 648 if (arg < 1900) 649 return -EINVAL; 650 if (!capable(CAP_SYS_TIME)) 651 return -EACCES; 652 653 epoch = arg; 654 return 0; 655 } 656 default: 657 return -EINVAL; 658 } 659 return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0; 660 #endif 661 } 662 663 static long hp_sdc_rtc_unlocked_ioctl(struct file *file, 664 unsigned int cmd, unsigned long arg) 665 { 666 int ret; 667 668 lock_kernel(); 669 ret = hp_sdc_rtc_ioctl(file, cmd, arg); 670 unlock_kernel(); 671 672 return ret; 673 } 674 675 676 static const struct file_operations hp_sdc_rtc_fops = { 677 .owner = THIS_MODULE, 678 .llseek = no_llseek, 679 .read = hp_sdc_rtc_read, 680 .poll = hp_sdc_rtc_poll, 681 .unlocked_ioctl = hp_sdc_rtc_ioctl, 682 .open = hp_sdc_rtc_open, 683 .fasync = hp_sdc_rtc_fasync, 684 }; 685 686 static struct miscdevice hp_sdc_rtc_dev = { 687 .minor = RTC_MINOR, 688 .name = "rtc_HIL", 689 .fops = &hp_sdc_rtc_fops 690 }; 691 692 static int __init hp_sdc_rtc_init(void) 693 { 694 int ret; 695 696 #ifdef __mc68000__ 697 if (!MACH_IS_HP300) 698 return -ENODEV; 699 #endif 700 701 init_MUTEX(&i8042tregs); 702 703 if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr))) 704 return ret; 705 if (misc_register(&hp_sdc_rtc_dev) != 0) 706 printk(KERN_INFO "Could not register misc. dev for i8042 rtc\n"); 707 708 create_proc_read_entry ("driver/rtc", 0, NULL, 709 hp_sdc_rtc_read_proc, NULL); 710 711 printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support loaded " 712 "(RTC v " RTC_VERSION ")\n"); 713 714 return 0; 715 } 716 717 static void __exit hp_sdc_rtc_exit(void) 718 { 719 remove_proc_entry ("driver/rtc", NULL); 720 misc_deregister(&hp_sdc_rtc_dev); 721 hp_sdc_release_timer_irq(hp_sdc_rtc_isr); 722 printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support unloaded\n"); 723 } 724 725 module_init(hp_sdc_rtc_init); 726 module_exit(hp_sdc_rtc_exit); 727