Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 47 | MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); |
| 48 | MODULE_DESCRIPTION("HP i8042 SDC + MSM-58321 RTC Driver"); |
| 49 | MODULE_LICENSE("Dual BSD/GPL"); |
| 50 | |
| 51 | #define RTC_VERSION "1.10d" |
| 52 | |
| 53 | static unsigned long epoch = 2000; |
| 54 | |
| 55 | static struct semaphore i8042tregs; |
| 56 | |
| 57 | static hp_sdc_irqhook hp_sdc_rtc_isr; |
| 58 | |
| 59 | static struct fasync_struct *hp_sdc_rtc_async_queue; |
| 60 | |
| 61 | static DECLARE_WAIT_QUEUE_HEAD(hp_sdc_rtc_wait); |
| 62 | |
Al Viro | 6ce6b3a | 2006-10-14 16:52:36 +0100 | [diff] [blame] | 63 | static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | size_t count, loff_t *ppos); |
| 65 | |
| 66 | static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file, |
| 67 | unsigned int cmd, unsigned long arg); |
| 68 | |
| 69 | static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait); |
| 70 | |
| 71 | static int hp_sdc_rtc_open(struct inode *inode, struct file *file); |
| 72 | static int hp_sdc_rtc_release(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 | uint64_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 | |
Al Viro | 6ce6b3a | 2006-10-14 16:52:36 +0100 | [diff] [blame] | 388 | static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | size_t count, loff_t *ppos) { |
| 390 | ssize_t retval; |
| 391 | |
| 392 | if (count < sizeof(unsigned long)) |
| 393 | return -EINVAL; |
| 394 | |
Al Viro | 6ce6b3a | 2006-10-14 16:52:36 +0100 | [diff] [blame] | 395 | retval = put_user(68, (unsigned long __user *)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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_release(struct inode *inode, struct file *file) |
| 415 | { |
| 416 | /* Turn off interrupts? */ |
| 417 | |
| 418 | if (file->f_flags & FASYNC) { |
| 419 | hp_sdc_rtc_fasync (-1, file, 0); |
| 420 | } |
| 421 | |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on) |
| 426 | { |
| 427 | return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue); |
| 428 | } |
| 429 | |
| 430 | static int hp_sdc_rtc_proc_output (char *buf) |
| 431 | { |
| 432 | #define YN(bit) ("no") |
| 433 | #define NY(bit) ("yes") |
| 434 | char *p; |
| 435 | struct rtc_time tm; |
| 436 | struct timeval tv; |
| 437 | |
| 438 | memset(&tm, 0, sizeof(struct rtc_time)); |
| 439 | |
| 440 | p = buf; |
| 441 | |
| 442 | if (hp_sdc_rtc_read_bbrtc(&tm)) { |
| 443 | p += sprintf(p, "BBRTC\t\t: READ FAILED!\n"); |
| 444 | } else { |
| 445 | p += sprintf(p, |
| 446 | "rtc_time\t: %02d:%02d:%02d\n" |
| 447 | "rtc_date\t: %04d-%02d-%02d\n" |
| 448 | "rtc_epoch\t: %04lu\n", |
| 449 | tm.tm_hour, tm.tm_min, tm.tm_sec, |
| 450 | tm.tm_year + 1900, tm.tm_mon + 1, |
| 451 | tm.tm_mday, epoch); |
| 452 | } |
| 453 | |
| 454 | if (hp_sdc_rtc_read_rt(&tv)) { |
| 455 | p += sprintf(p, "i8042 rtc\t: READ FAILED!\n"); |
| 456 | } else { |
| 457 | p += sprintf(p, "i8042 rtc\t: %ld.%02d seconds\n", |
| 458 | tv.tv_sec, tv.tv_usec/1000); |
| 459 | } |
| 460 | |
| 461 | if (hp_sdc_rtc_read_fhs(&tv)) { |
| 462 | p += sprintf(p, "handshake\t: READ FAILED!\n"); |
| 463 | } else { |
| 464 | p += sprintf(p, "handshake\t: %ld.%02d seconds\n", |
| 465 | tv.tv_sec, tv.tv_usec/1000); |
| 466 | } |
| 467 | |
| 468 | if (hp_sdc_rtc_read_mt(&tv)) { |
| 469 | p += sprintf(p, "alarm\t\t: READ FAILED!\n"); |
| 470 | } else { |
| 471 | p += sprintf(p, "alarm\t\t: %ld.%02d seconds\n", |
| 472 | tv.tv_sec, tv.tv_usec/1000); |
| 473 | } |
| 474 | |
| 475 | if (hp_sdc_rtc_read_dt(&tv)) { |
| 476 | p += sprintf(p, "delay\t\t: READ FAILED!\n"); |
| 477 | } else { |
| 478 | p += sprintf(p, "delay\t\t: %ld.%02d seconds\n", |
| 479 | tv.tv_sec, tv.tv_usec/1000); |
| 480 | } |
| 481 | |
| 482 | if (hp_sdc_rtc_read_ct(&tv)) { |
| 483 | p += sprintf(p, "periodic\t: READ FAILED!\n"); |
| 484 | } else { |
| 485 | p += sprintf(p, "periodic\t: %ld.%02d seconds\n", |
| 486 | tv.tv_sec, tv.tv_usec/1000); |
| 487 | } |
| 488 | |
| 489 | p += sprintf(p, |
| 490 | "DST_enable\t: %s\n" |
| 491 | "BCD\t\t: %s\n" |
| 492 | "24hr\t\t: %s\n" |
| 493 | "square_wave\t: %s\n" |
| 494 | "alarm_IRQ\t: %s\n" |
| 495 | "update_IRQ\t: %s\n" |
| 496 | "periodic_IRQ\t: %s\n" |
| 497 | "periodic_freq\t: %ld\n" |
| 498 | "batt_status\t: %s\n", |
| 499 | YN(RTC_DST_EN), |
| 500 | NY(RTC_DM_BINARY), |
| 501 | YN(RTC_24H), |
| 502 | YN(RTC_SQWE), |
| 503 | YN(RTC_AIE), |
| 504 | YN(RTC_UIE), |
| 505 | YN(RTC_PIE), |
| 506 | 1UL, |
| 507 | 1 ? "okay" : "dead"); |
| 508 | |
| 509 | return p - buf; |
| 510 | #undef YN |
| 511 | #undef NY |
| 512 | } |
| 513 | |
| 514 | static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off, |
| 515 | int count, int *eof, void *data) |
| 516 | { |
| 517 | int len = hp_sdc_rtc_proc_output (page); |
| 518 | if (len <= off+count) *eof = 1; |
| 519 | *start = page + off; |
| 520 | len -= off; |
| 521 | if (len>count) len = count; |
| 522 | if (len<0) len = 0; |
| 523 | return len; |
| 524 | } |
| 525 | |
| 526 | static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file, |
| 527 | unsigned int cmd, unsigned long arg) |
| 528 | { |
| 529 | #if 1 |
| 530 | return -EINVAL; |
| 531 | #else |
| 532 | |
| 533 | struct rtc_time wtime; |
| 534 | struct timeval ttime; |
| 535 | int use_wtime = 0; |
| 536 | |
| 537 | /* This needs major work. */ |
| 538 | |
| 539 | switch (cmd) { |
| 540 | |
| 541 | case RTC_AIE_OFF: /* Mask alarm int. enab. bit */ |
| 542 | case RTC_AIE_ON: /* Allow alarm interrupts. */ |
| 543 | case RTC_PIE_OFF: /* Mask periodic int. enab. bit */ |
| 544 | case RTC_PIE_ON: /* Allow periodic ints */ |
| 545 | case RTC_UIE_ON: /* Allow ints for RTC updates. */ |
| 546 | case RTC_UIE_OFF: /* Allow ints for RTC updates. */ |
| 547 | { |
| 548 | /* We cannot mask individual user timers and we |
| 549 | cannot tell them apart when they occur, so it |
| 550 | would be disingenuous to succeed these IOCTLs */ |
| 551 | return -EINVAL; |
| 552 | } |
| 553 | case RTC_ALM_READ: /* Read the present alarm time */ |
| 554 | { |
| 555 | if (hp_sdc_rtc_read_mt(&ttime)) return -EFAULT; |
| 556 | if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT; |
| 557 | |
| 558 | wtime.tm_hour = ttime.tv_sec / 3600; ttime.tv_sec %= 3600; |
| 559 | wtime.tm_min = ttime.tv_sec / 60; ttime.tv_sec %= 60; |
| 560 | wtime.tm_sec = ttime.tv_sec; |
| 561 | |
| 562 | break; |
| 563 | } |
| 564 | case RTC_IRQP_READ: /* Read the periodic IRQ rate. */ |
| 565 | { |
| 566 | return put_user(hp_sdc_rtc_freq, (unsigned long *)arg); |
| 567 | } |
| 568 | case RTC_IRQP_SET: /* Set periodic IRQ rate. */ |
| 569 | { |
| 570 | /* |
| 571 | * The max we can do is 100Hz. |
| 572 | */ |
| 573 | |
| 574 | if ((arg < 1) || (arg > 100)) return -EINVAL; |
| 575 | ttime.tv_sec = 0; |
| 576 | ttime.tv_usec = 1000000 / arg; |
| 577 | if (hp_sdc_rtc_set_ct(&ttime)) return -EFAULT; |
| 578 | hp_sdc_rtc_freq = arg; |
| 579 | return 0; |
| 580 | } |
| 581 | case RTC_ALM_SET: /* Store a time into the alarm */ |
| 582 | { |
| 583 | /* |
| 584 | * This expects a struct hp_sdc_rtc_time. Writing 0xff means |
| 585 | * "don't care" or "match all" for PC timers. The HP SDC |
| 586 | * does not support that perk, but it could be emulated fairly |
| 587 | * easily. Only the tm_hour, tm_min and tm_sec are used. |
| 588 | * We could do it with 10ms accuracy with the HP SDC, if the |
| 589 | * rtc interface left us a way to do that. |
| 590 | */ |
| 591 | struct hp_sdc_rtc_time alm_tm; |
| 592 | |
| 593 | if (copy_from_user(&alm_tm, (struct hp_sdc_rtc_time*)arg, |
| 594 | sizeof(struct hp_sdc_rtc_time))) |
| 595 | return -EFAULT; |
| 596 | |
| 597 | if (alm_tm.tm_hour > 23) return -EINVAL; |
| 598 | if (alm_tm.tm_min > 59) return -EINVAL; |
| 599 | if (alm_tm.tm_sec > 59) return -EINVAL; |
| 600 | |
| 601 | ttime.sec = alm_tm.tm_hour * 3600 + |
| 602 | alm_tm.tm_min * 60 + alm_tm.tm_sec; |
| 603 | ttime.usec = 0; |
| 604 | if (hp_sdc_rtc_set_mt(&ttime)) return -EFAULT; |
| 605 | return 0; |
| 606 | } |
| 607 | case RTC_RD_TIME: /* Read the time/date from RTC */ |
| 608 | { |
| 609 | if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT; |
| 610 | break; |
| 611 | } |
| 612 | case RTC_SET_TIME: /* Set the RTC */ |
| 613 | { |
| 614 | struct rtc_time hp_sdc_rtc_tm; |
| 615 | unsigned char mon, day, hrs, min, sec, leap_yr; |
| 616 | unsigned int yrs; |
| 617 | |
| 618 | if (!capable(CAP_SYS_TIME)) |
| 619 | return -EACCES; |
| 620 | if (copy_from_user(&hp_sdc_rtc_tm, (struct rtc_time *)arg, |
| 621 | sizeof(struct rtc_time))) |
| 622 | return -EFAULT; |
| 623 | |
| 624 | yrs = hp_sdc_rtc_tm.tm_year + 1900; |
| 625 | mon = hp_sdc_rtc_tm.tm_mon + 1; /* tm_mon starts at zero */ |
| 626 | day = hp_sdc_rtc_tm.tm_mday; |
| 627 | hrs = hp_sdc_rtc_tm.tm_hour; |
| 628 | min = hp_sdc_rtc_tm.tm_min; |
| 629 | sec = hp_sdc_rtc_tm.tm_sec; |
| 630 | |
| 631 | if (yrs < 1970) |
| 632 | return -EINVAL; |
| 633 | |
| 634 | leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400)); |
| 635 | |
| 636 | if ((mon > 12) || (day == 0)) |
| 637 | return -EINVAL; |
| 638 | if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr))) |
| 639 | return -EINVAL; |
| 640 | if ((hrs >= 24) || (min >= 60) || (sec >= 60)) |
| 641 | return -EINVAL; |
| 642 | |
| 643 | if ((yrs -= eH) > 255) /* They are unsigned */ |
| 644 | return -EINVAL; |
| 645 | |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | case RTC_EPOCH_READ: /* Read the epoch. */ |
| 650 | { |
| 651 | return put_user (epoch, (unsigned long *)arg); |
| 652 | } |
| 653 | case RTC_EPOCH_SET: /* Set the epoch. */ |
| 654 | { |
| 655 | /* |
| 656 | * There were no RTC clocks before 1900. |
| 657 | */ |
| 658 | if (arg < 1900) |
| 659 | return -EINVAL; |
| 660 | if (!capable(CAP_SYS_TIME)) |
| 661 | return -EACCES; |
| 662 | |
| 663 | epoch = arg; |
| 664 | return 0; |
| 665 | } |
| 666 | default: |
| 667 | return -EINVAL; |
| 668 | } |
| 669 | return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0; |
| 670 | #endif |
| 671 | } |
| 672 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 673 | static const struct file_operations hp_sdc_rtc_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | .owner = THIS_MODULE, |
Marcelo Tosatti | 70c00ba | 2006-01-08 01:00:29 -0800 | [diff] [blame] | 675 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | .read = hp_sdc_rtc_read, |
| 677 | .poll = hp_sdc_rtc_poll, |
| 678 | .ioctl = hp_sdc_rtc_ioctl, |
| 679 | .open = hp_sdc_rtc_open, |
| 680 | .release = hp_sdc_rtc_release, |
| 681 | .fasync = hp_sdc_rtc_fasync, |
| 682 | }; |
| 683 | |
| 684 | static struct miscdevice hp_sdc_rtc_dev = { |
| 685 | .minor = RTC_MINOR, |
| 686 | .name = "rtc_HIL", |
| 687 | .fops = &hp_sdc_rtc_fops |
| 688 | }; |
| 689 | |
| 690 | static int __init hp_sdc_rtc_init(void) |
| 691 | { |
| 692 | int ret; |
| 693 | |
Geert Uytterhoeven | eb98630 | 2008-05-18 20:47:17 +0200 | [diff] [blame^] | 694 | #ifdef __mc68000__ |
| 695 | if (!MACH_IS_HP300) |
| 696 | return -ENODEV; |
| 697 | #endif |
| 698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | init_MUTEX(&i8042tregs); |
| 700 | |
| 701 | if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr))) |
| 702 | return ret; |
Neil Horman | 5d469ec | 2006-12-06 20:37:08 -0800 | [diff] [blame] | 703 | if (misc_register(&hp_sdc_rtc_dev) != 0) |
| 704 | printk(KERN_INFO "Could not register misc. dev for i8042 rtc\n"); |
| 705 | |
Al Viro | 6ce6b3a | 2006-10-14 16:52:36 +0100 | [diff] [blame] | 706 | create_proc_read_entry ("driver/rtc", 0, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | hp_sdc_rtc_read_proc, NULL); |
| 708 | |
| 709 | printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support loaded " |
| 710 | "(RTC v " RTC_VERSION ")\n"); |
| 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | static void __exit hp_sdc_rtc_exit(void) |
| 716 | { |
| 717 | remove_proc_entry ("driver/rtc", NULL); |
| 718 | misc_deregister(&hp_sdc_rtc_dev); |
| 719 | hp_sdc_release_timer_irq(hp_sdc_rtc_isr); |
| 720 | printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support unloaded\n"); |
| 721 | } |
| 722 | |
| 723 | module_init(hp_sdc_rtc_init); |
| 724 | module_exit(hp_sdc_rtc_exit); |