Blame view
drivers/rtc/rtc-rs5c313.c
10.7 KB
e9f2bd819 RTC: add rtc-rs5c... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 |
/* * Ricoh RS5C313 RTC device/driver * Copyright (C) 2007 Nobuhiro Iwamatsu * * 2005-09-19 modifed by kogiidena * * Based on the old drivers/char/rs5c313_rtc.c by: * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka * * Based on code written by Paul Gortmaker. * Copyright (C) 1996 Paul Gortmaker * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Based on other minimal char device drivers, like Alan's * watchdog, Ted's random, etc. etc. * * 1.07 Paul Gortmaker. * 1.08 Miquel van Smoorenburg: disallow certain things on the * DEC Alpha as the CMOS clock is also used for other things. * 1.09 Nikita Schmidt: epoch support and some Alpha cleanup. * 1.09a Pete Zaitcev: Sun SPARC * 1.09b Jeff Garzik: Modularize, init cleanup * 1.09c Jeff Garzik: SMP cleanup * 1.10 Paul Barton-Davis: add support for async I/O * 1.10a Andrea Arcangeli: Alpha updates * 1.10b Andrew Morton: SMP lock fix * 1.10c Cesar Barros: SMP locking fixes and cleanup * 1.10d Paul Gortmaker: delete paranoia check in rtc_exit * 1.10e Maciej W. Rozycki: Handle DECstation's year weirdness. * 1.11 Takashi Iwai: Kernel access functions * rtc_register/rtc_unregister/rtc_control * 1.11a Daniele Bellucci: Audit create_proc_read_entry in rtc_init * 1.12 Venkatesh Pallipadi: Hooks for emulating rtc on HPET base-timer * CONFIG_HPET_EMULATE_RTC * 1.13 Nobuhiro Iwamatsu: Updata driver. */ #include <linux/module.h> #include <linux/err.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/bcd.h> #include <linux/delay.h> #include <asm/io.h> #define DRV_NAME "rs5c313" #define DRV_VERSION "1.13" #ifdef CONFIG_SH_LANDISK /*****************************************************/ /* LANDISK dependence part of RS5C313 */ /*****************************************************/ #define SCSMR1 0xFFE00000 #define SCSCR1 0xFFE00008 #define SCSMR1_CA 0x80 #define SCSCR1_CKE 0x03 #define SCSPTR1 0xFFE0001C #define SCSPTR1_EIO 0x80 #define SCSPTR1_SPB1IO 0x08 #define SCSPTR1_SPB1DT 0x04 #define SCSPTR1_SPB0IO 0x02 #define SCSPTR1_SPB0DT 0x01 #define SDA_OEN SCSPTR1_SPB1IO #define SDA SCSPTR1_SPB1DT #define SCL_OEN SCSPTR1_SPB0IO #define SCL SCSPTR1_SPB0DT /* RICOH RS5C313 CE port */ #define RS5C313_CE 0xB0000003 /* RICOH RS5C313 CE port bit */ #define RS5C313_CE_RTCCE 0x02 /* SCSPTR1 data */ unsigned char scsptr1_data; |
071a1e33b rtc: rtc-rs5c313:... |
82 83 84 |
#define RS5C313_CEENABLE __raw_writeb(RS5C313_CE_RTCCE, RS5C313_CE); #define RS5C313_CEDISABLE __raw_writeb(0x00, RS5C313_CE) #define RS5C313_MISCOP __raw_writeb(0x02, 0xB0000008) |
e9f2bd819 RTC: add rtc-rs5c... |
85 86 87 88 |
static void rs5c313_init_port(void) { /* Set SCK as I/O port and Initialize SCSPTR1 data & I/O port. */ |
071a1e33b rtc: rtc-rs5c313:... |
89 90 |
__raw_writeb(__raw_readb(SCSMR1) & ~SCSMR1_CA, SCSMR1); __raw_writeb(__raw_readb(SCSCR1) & ~SCSCR1_CKE, SCSCR1); |
e9f2bd819 RTC: add rtc-rs5c... |
91 92 |
/* And Initialize SCL for RS5C313 clock */ |
071a1e33b rtc: rtc-rs5c313:... |
93 94 95 96 |
scsptr1_data = __raw_readb(SCSPTR1) | SCL; /* SCL:H */ __raw_writeb(scsptr1_data, SCSPTR1); scsptr1_data = __raw_readb(SCSPTR1) | SCL_OEN; /* SCL output enable */ __raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
97 98 99 100 101 102 103 104 105 106 107 |
RS5C313_CEDISABLE; /* CE:L */ } static void rs5c313_write_data(unsigned char data) { int i; for (i = 0; i < 8; i++) { /* SDA:Write Data */ scsptr1_data = (scsptr1_data & ~SDA) | ((((0x80 >> i) & data) >> (7 - i)) << 2); |
071a1e33b rtc: rtc-rs5c313:... |
108 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
109 110 |
if (i == 0) { scsptr1_data |= SDA_OEN; /* SDA:output enable */ |
071a1e33b rtc: rtc-rs5c313:... |
111 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
112 113 114 |
} ndelay(700); scsptr1_data &= ~SCL; /* SCL:L */ |
071a1e33b rtc: rtc-rs5c313:... |
115 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
116 117 |
ndelay(700); scsptr1_data |= SCL; /* SCL:H */ |
071a1e33b rtc: rtc-rs5c313:... |
118 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
119 120 121 |
} scsptr1_data &= ~SDA_OEN; /* SDA:output disable */ |
071a1e33b rtc: rtc-rs5c313:... |
122 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
123 124 125 126 127 |
} static unsigned char rs5c313_read_data(void) { int i; |
9a3f1d53d rtc-rs5c313.c: er... |
128 |
unsigned char data = 0; |
e9f2bd819 RTC: add rtc-rs5c... |
129 130 131 132 |
for (i = 0; i < 8; i++) { ndelay(700); /* SDA:Read Data */ |
071a1e33b rtc: rtc-rs5c313:... |
133 |
data |= ((__raw_readb(SCSPTR1) & SDA) >> 2) << (7 - i); |
e9f2bd819 RTC: add rtc-rs5c... |
134 |
scsptr1_data &= ~SCL; /* SCL:L */ |
071a1e33b rtc: rtc-rs5c313:... |
135 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
136 137 |
ndelay(700); scsptr1_data |= SCL; /* SCL:H */ |
071a1e33b rtc: rtc-rs5c313:... |
138 |
__raw_writeb(scsptr1_data, SCSPTR1); |
e9f2bd819 RTC: add rtc-rs5c... |
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 |
} return data & 0x0F; } #endif /* CONFIG_SH_LANDISK */ /*****************************************************/ /* machine independence part of RS5C313 */ /*****************************************************/ /* RICOH RS5C313 address */ #define RS5C313_ADDR_SEC 0x00 #define RS5C313_ADDR_SEC10 0x01 #define RS5C313_ADDR_MIN 0x02 #define RS5C313_ADDR_MIN10 0x03 #define RS5C313_ADDR_HOUR 0x04 #define RS5C313_ADDR_HOUR10 0x05 #define RS5C313_ADDR_WEEK 0x06 #define RS5C313_ADDR_INTINTVREG 0x07 #define RS5C313_ADDR_DAY 0x08 #define RS5C313_ADDR_DAY10 0x09 #define RS5C313_ADDR_MON 0x0A #define RS5C313_ADDR_MON10 0x0B #define RS5C313_ADDR_YEAR 0x0C #define RS5C313_ADDR_YEAR10 0x0D #define RS5C313_ADDR_CNTREG 0x0E #define RS5C313_ADDR_TESTREG 0x0F /* RICOH RS5C313 control register */ #define RS5C313_CNTREG_ADJ_BSY 0x01 #define RS5C313_CNTREG_WTEN_XSTP 0x02 #define RS5C313_CNTREG_12_24 0x04 #define RS5C313_CNTREG_CTFG 0x08 /* RICOH RS5C313 test register */ #define RS5C313_TESTREG_TEST 0x01 /* RICOH RS5C313 control bit */ #define RS5C313_CNTBIT_READ 0x40 #define RS5C313_CNTBIT_AD 0x20 #define RS5C313_CNTBIT_DT 0x10 static unsigned char rs5c313_read_reg(unsigned char addr) { rs5c313_write_data(addr | RS5C313_CNTBIT_READ | RS5C313_CNTBIT_AD); return rs5c313_read_data(); } static void rs5c313_write_reg(unsigned char addr, unsigned char data) { data &= 0x0f; rs5c313_write_data(addr | RS5C313_CNTBIT_AD); rs5c313_write_data(data | RS5C313_CNTBIT_DT); return; } |
9a3f1d53d rtc-rs5c313.c: er... |
195 |
static inline unsigned char rs5c313_read_cntreg(void) |
e9f2bd819 RTC: add rtc-rs5c... |
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 |
{ return rs5c313_read_reg(RS5C313_ADDR_CNTREG); } static inline void rs5c313_write_cntreg(unsigned char data) { rs5c313_write_reg(RS5C313_ADDR_CNTREG, data); } static inline void rs5c313_write_intintvreg(unsigned char data) { rs5c313_write_reg(RS5C313_ADDR_INTINTVREG, data); } static int rs5c313_rtc_read_time(struct device *dev, struct rtc_time *tm) { int data; |
4ac24b3ba rtc-rs5c313.c: ad... |
213 |
int cnt; |
e9f2bd819 RTC: add rtc-rs5c... |
214 |
|
4ac24b3ba rtc-rs5c313.c: ad... |
215 |
cnt = 0; |
e9f2bd819 RTC: add rtc-rs5c... |
216 217 218 219 220 221 222 223 224 225 226 |
while (1) { RS5C313_CEENABLE; /* CE:H */ /* Initialize control reg. 24 hour */ rs5c313_write_cntreg(0x04); if (!(rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY)) break; RS5C313_CEDISABLE; ndelay(700); /* CE:L */ |
4ac24b3ba rtc-rs5c313.c: ad... |
227 |
if (cnt++ > 100) { |
2a4e2b878 rtc: replace rema... |
228 229 |
dev_err(dev, "%s: timeout error ", __func__); |
4ac24b3ba rtc-rs5c313.c: ad... |
230 231 |
return -EIO; } |
e9f2bd819 RTC: add rtc-rs5c... |
232 233 234 235 |
} data = rs5c313_read_reg(RS5C313_ADDR_SEC); data |= (rs5c313_read_reg(RS5C313_ADDR_SEC10) << 4); |
fe20ba70a drivers/rtc/: use... |
236 |
tm->tm_sec = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
237 238 239 |
data = rs5c313_read_reg(RS5C313_ADDR_MIN); data |= (rs5c313_read_reg(RS5C313_ADDR_MIN10) << 4); |
fe20ba70a drivers/rtc/: use... |
240 |
tm->tm_min = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
241 242 243 |
data = rs5c313_read_reg(RS5C313_ADDR_HOUR); data |= (rs5c313_read_reg(RS5C313_ADDR_HOUR10) << 4); |
fe20ba70a drivers/rtc/: use... |
244 |
tm->tm_hour = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
245 246 247 |
data = rs5c313_read_reg(RS5C313_ADDR_DAY); data |= (rs5c313_read_reg(RS5C313_ADDR_DAY10) << 4); |
fe20ba70a drivers/rtc/: use... |
248 |
tm->tm_mday = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
249 250 251 |
data = rs5c313_read_reg(RS5C313_ADDR_MON); data |= (rs5c313_read_reg(RS5C313_ADDR_MON10) << 4); |
fe20ba70a drivers/rtc/: use... |
252 |
tm->tm_mon = bcd2bin(data) - 1; |
e9f2bd819 RTC: add rtc-rs5c... |
253 254 255 |
data = rs5c313_read_reg(RS5C313_ADDR_YEAR); data |= (rs5c313_read_reg(RS5C313_ADDR_YEAR10) << 4); |
fe20ba70a drivers/rtc/: use... |
256 |
tm->tm_year = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
257 258 259 260 261 |
if (tm->tm_year < 70) tm->tm_year += 100; data = rs5c313_read_reg(RS5C313_ADDR_WEEK); |
fe20ba70a drivers/rtc/: use... |
262 |
tm->tm_wday = bcd2bin(data); |
e9f2bd819 RTC: add rtc-rs5c... |
263 264 265 266 267 268 269 270 271 272 |
RS5C313_CEDISABLE; ndelay(700); /* CE:L */ return 0; } static int rs5c313_rtc_set_time(struct device *dev, struct rtc_time *tm) { int data; |
4ac24b3ba rtc-rs5c313.c: ad... |
273 |
int cnt; |
e9f2bd819 RTC: add rtc-rs5c... |
274 |
|
4ac24b3ba rtc-rs5c313.c: ad... |
275 |
cnt = 0; |
e9f2bd819 RTC: add rtc-rs5c... |
276 277 278 279 280 281 282 283 284 285 286 287 |
/* busy check. */ while (1) { RS5C313_CEENABLE; /* CE:H */ /* Initiatlize control reg. 24 hour */ rs5c313_write_cntreg(0x04); if (!(rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY)) break; RS5C313_MISCOP; RS5C313_CEDISABLE; ndelay(700); /* CE:L */ |
4ac24b3ba rtc-rs5c313.c: ad... |
288 289 |
if (cnt++ > 100) { |
2a4e2b878 rtc: replace rema... |
290 291 |
dev_err(dev, "%s: timeout error ", __func__); |
4ac24b3ba rtc-rs5c313.c: ad... |
292 293 |
return -EIO; } |
e9f2bd819 RTC: add rtc-rs5c... |
294 |
} |
fe20ba70a drivers/rtc/: use... |
295 |
data = bin2bcd(tm->tm_sec); |
e9f2bd819 RTC: add rtc-rs5c... |
296 297 |
rs5c313_write_reg(RS5C313_ADDR_SEC, data); rs5c313_write_reg(RS5C313_ADDR_SEC10, (data >> 4)); |
fe20ba70a drivers/rtc/: use... |
298 |
data = bin2bcd(tm->tm_min); |
e9f2bd819 RTC: add rtc-rs5c... |
299 300 |
rs5c313_write_reg(RS5C313_ADDR_MIN, data ); rs5c313_write_reg(RS5C313_ADDR_MIN10, (data >> 4)); |
fe20ba70a drivers/rtc/: use... |
301 |
data = bin2bcd(tm->tm_hour); |
e9f2bd819 RTC: add rtc-rs5c... |
302 303 |
rs5c313_write_reg(RS5C313_ADDR_HOUR, data); rs5c313_write_reg(RS5C313_ADDR_HOUR10, (data >> 4)); |
fe20ba70a drivers/rtc/: use... |
304 |
data = bin2bcd(tm->tm_mday); |
e9f2bd819 RTC: add rtc-rs5c... |
305 306 |
rs5c313_write_reg(RS5C313_ADDR_DAY, data); rs5c313_write_reg(RS5C313_ADDR_DAY10, (data>> 4)); |
fe20ba70a drivers/rtc/: use... |
307 |
data = bin2bcd(tm->tm_mon + 1); |
e9f2bd819 RTC: add rtc-rs5c... |
308 309 |
rs5c313_write_reg(RS5C313_ADDR_MON, data); rs5c313_write_reg(RS5C313_ADDR_MON10, (data >> 4)); |
fe20ba70a drivers/rtc/: use... |
310 |
data = bin2bcd(tm->tm_year % 100); |
e9f2bd819 RTC: add rtc-rs5c... |
311 312 |
rs5c313_write_reg(RS5C313_ADDR_YEAR, data); rs5c313_write_reg(RS5C313_ADDR_YEAR10, (data >> 4)); |
fe20ba70a drivers/rtc/: use... |
313 |
data = bin2bcd(tm->tm_wday); |
e9f2bd819 RTC: add rtc-rs5c... |
314 315 316 317 318 319 320 321 322 323 324 |
rs5c313_write_reg(RS5C313_ADDR_WEEK, data); RS5C313_CEDISABLE; /* CE:H */ ndelay(700); return 0; } static void rs5c313_check_xstp_bit(void) { struct rtc_time tm; |
4ac24b3ba rtc-rs5c313.c: ad... |
325 |
int cnt; |
e9f2bd819 RTC: add rtc-rs5c... |
326 327 328 329 330 331 332 333 334 |
RS5C313_CEENABLE; /* CE:H */ if (rs5c313_read_cntreg() & RS5C313_CNTREG_WTEN_XSTP) { /* INT interval reg. OFF */ rs5c313_write_intintvreg(0x00); /* Initialize control reg. 24 hour & adjust */ rs5c313_write_cntreg(0x07); /* busy check. */ |
4ac24b3ba rtc-rs5c313.c: ad... |
335 336 337 |
for (cnt = 0; cnt < 100; cnt++) { if (!(rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY)) break; |
e9f2bd819 RTC: add rtc-rs5c... |
338 |
RS5C313_MISCOP; |
4ac24b3ba rtc-rs5c313.c: ad... |
339 |
} |
e9f2bd819 RTC: add rtc-rs5c... |
340 341 342 |
memset(&tm, 0, sizeof(struct rtc_time)); tm.tm_mday = 1; |
5a6a07895 rtc-rs5c313.c: rt... |
343 344 |
tm.tm_mon = 1 - 1; tm.tm_year = 2000 - 1900; |
e9f2bd819 RTC: add rtc-rs5c... |
345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 |
rs5c313_rtc_set_time(NULL, &tm); printk(KERN_ERR "RICHO RS5C313: invalid value, resetting to " "1 Jan 2000 "); } RS5C313_CEDISABLE; ndelay(700); /* CE:L */ } static const struct rtc_class_ops rs5c313_rtc_ops = { .read_time = rs5c313_rtc_read_time, .set_time = rs5c313_rtc_set_time, }; static int rs5c313_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc = rtc_device_register("rs5c313", &pdev->dev, &rs5c313_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); platform_set_drvdata(pdev, rtc); |
9a3f1d53d rtc-rs5c313.c: er... |
369 |
return 0; |
e9f2bd819 RTC: add rtc-rs5c... |
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 |
} static int __devexit rs5c313_rtc_remove(struct platform_device *pdev) { struct rtc_device *rtc = platform_get_drvdata( pdev ); rtc_device_unregister(rtc); return 0; } static struct platform_driver rs5c313_rtc_platform_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, .probe = rs5c313_rtc_probe, .remove = __devexit_p( rs5c313_rtc_remove ), }; static int __init rs5c313_rtc_init(void) { int err; err = platform_driver_register(&rs5c313_rtc_platform_driver); if (err) return err; rs5c313_init_port(); rs5c313_check_xstp_bit(); return 0; } static void __exit rs5c313_rtc_exit(void) { platform_driver_unregister( &rs5c313_rtc_platform_driver ); } module_init(rs5c313_rtc_init); module_exit(rs5c313_rtc_exit); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR("kogiidena , Nobuhiro Iwamatsu <iwamatsu@nigauri.org>"); MODULE_DESCRIPTION("Ricoh RS5C313 RTC device driver"); MODULE_LICENSE("GPL"); |
ad28a07bc rtc: fix platform... |
416 |
MODULE_ALIAS("platform:" DRV_NAME); |