Commit | Line | Data |
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5bccae6e | 1 | /* |
f8b23bbd | 2 | * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd |
5bccae6e SK |
3 | * http://www.samsung.com |
4 | * | |
5 | * Copyright (C) 2013 Google, Inc | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/bcd.h> | |
22 | #include <linux/bitops.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/rtc.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/mfd/samsung/core.h> | |
28 | #include <linux/mfd/samsung/irq.h> | |
29 | #include <linux/mfd/samsung/rtc.h> | |
30 | ||
d73238d4 KK |
31 | /* |
32 | * Maximum number of retries for checking changes in UDR field | |
602cb5bb | 33 | * of S5M_RTC_UDR_CON register (to limit possible endless loop). |
d73238d4 KK |
34 | * |
35 | * After writing to RTC registers (setting time or alarm) read the UDR field | |
602cb5bb | 36 | * in S5M_RTC_UDR_CON register. UDR is auto-cleared when data have |
d73238d4 KK |
37 | * been transferred. |
38 | */ | |
39 | #define UDR_READ_RETRY_CNT 5 | |
40 | ||
f8b23bbd KK |
41 | /* Registers used by the driver which are different between chipsets. */ |
42 | struct s5m_rtc_reg_config { | |
43 | /* Number of registers used for setting time/alarm0/alarm1 */ | |
44 | unsigned int regs_count; | |
45 | /* First register for time, seconds */ | |
46 | unsigned int time; | |
47 | /* RTC control register */ | |
48 | unsigned int ctrl; | |
49 | /* First register for alarm 0, seconds */ | |
50 | unsigned int alarm0; | |
51 | /* First register for alarm 1, seconds */ | |
52 | unsigned int alarm1; | |
53 | /* SMPL/WTSR register */ | |
54 | unsigned int smpl_wtsr; | |
55 | /* | |
56 | * Register for update flag (UDR). Typically setting UDR field to 1 | |
57 | * will enable update of time or alarm register. Then it will be | |
58 | * auto-cleared after successful update. | |
59 | */ | |
60 | unsigned int rtc_udr_update; | |
61 | /* Mask for UDR field in 'rtc_udr_update' register */ | |
62 | unsigned int rtc_udr_mask; | |
63 | }; | |
64 | ||
65 | /* Register map for S5M8763 and S5M8767 */ | |
66 | static const struct s5m_rtc_reg_config s5m_rtc_regs = { | |
67 | .regs_count = 8, | |
68 | .time = S5M_RTC_SEC, | |
69 | .ctrl = S5M_ALARM1_CONF, | |
70 | .alarm0 = S5M_ALARM0_SEC, | |
71 | .alarm1 = S5M_ALARM1_SEC, | |
72 | .smpl_wtsr = S5M_WTSR_SMPL_CNTL, | |
73 | .rtc_udr_update = S5M_RTC_UDR_CON, | |
74 | .rtc_udr_mask = S5M_RTC_UDR_MASK, | |
75 | }; | |
76 | ||
5bccae6e SK |
77 | struct s5m_rtc_info { |
78 | struct device *dev; | |
e349c910 | 79 | struct i2c_client *i2c; |
5bccae6e | 80 | struct sec_pmic_dev *s5m87xx; |
5ccb7d71 | 81 | struct regmap *regmap; |
5bccae6e SK |
82 | struct rtc_device *rtc_dev; |
83 | int irq; | |
84 | int device_type; | |
85 | int rtc_24hr_mode; | |
86 | bool wtsr_smpl; | |
f8b23bbd | 87 | const struct s5m_rtc_reg_config *regs; |
5bccae6e SK |
88 | }; |
89 | ||
e349c910 KK |
90 | static const struct regmap_config s5m_rtc_regmap_config = { |
91 | .reg_bits = 8, | |
92 | .val_bits = 8, | |
93 | ||
602cb5bb | 94 | .max_register = S5M_RTC_REG_MAX, |
e349c910 KK |
95 | }; |
96 | ||
97 | static const struct regmap_config s2mps14_rtc_regmap_config = { | |
98 | .reg_bits = 8, | |
99 | .val_bits = 8, | |
100 | ||
101 | .max_register = S2MPS_RTC_REG_MAX, | |
102 | }; | |
103 | ||
5bccae6e SK |
104 | static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, |
105 | int rtc_24hr_mode) | |
106 | { | |
107 | tm->tm_sec = data[RTC_SEC] & 0x7f; | |
108 | tm->tm_min = data[RTC_MIN] & 0x7f; | |
109 | if (rtc_24hr_mode) { | |
110 | tm->tm_hour = data[RTC_HOUR] & 0x1f; | |
111 | } else { | |
112 | tm->tm_hour = data[RTC_HOUR] & 0x0f; | |
113 | if (data[RTC_HOUR] & HOUR_PM_MASK) | |
114 | tm->tm_hour += 12; | |
115 | } | |
116 | ||
117 | tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f); | |
118 | tm->tm_mday = data[RTC_DATE] & 0x1f; | |
119 | tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; | |
120 | tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100; | |
121 | tm->tm_yday = 0; | |
122 | tm->tm_isdst = 0; | |
123 | } | |
124 | ||
125 | static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data) | |
126 | { | |
127 | data[RTC_SEC] = tm->tm_sec; | |
128 | data[RTC_MIN] = tm->tm_min; | |
129 | ||
130 | if (tm->tm_hour >= 12) | |
131 | data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK; | |
132 | else | |
133 | data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK; | |
134 | ||
135 | data[RTC_WEEKDAY] = 1 << tm->tm_wday; | |
136 | data[RTC_DATE] = tm->tm_mday; | |
137 | data[RTC_MONTH] = tm->tm_mon + 1; | |
138 | data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; | |
139 | ||
140 | if (tm->tm_year < 100) { | |
141 | pr_err("s5m8767 RTC cannot handle the year %d.\n", | |
142 | 1900 + tm->tm_year); | |
143 | return -EINVAL; | |
144 | } else { | |
145 | return 0; | |
146 | } | |
147 | } | |
148 | ||
d73238d4 KK |
149 | /* |
150 | * Read RTC_UDR_CON register and wait till UDR field is cleared. | |
151 | * This indicates that time/alarm update ended. | |
152 | */ | |
153 | static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info) | |
154 | { | |
155 | int ret, retry = UDR_READ_RETRY_CNT; | |
156 | unsigned int data; | |
157 | ||
158 | do { | |
f8b23bbd KK |
159 | ret = regmap_read(info->regmap, info->regs->rtc_udr_update, |
160 | &data); | |
161 | } while (--retry && (data & info->regs->rtc_udr_mask) && !ret); | |
d73238d4 KK |
162 | |
163 | if (!retry) | |
164 | dev_err(info->dev, "waiting for UDR update, reached max number of retries\n"); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
f8b23bbd KK |
169 | static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info, |
170 | struct rtc_wkalrm *alarm) | |
171 | { | |
172 | int ret; | |
173 | unsigned int val; | |
174 | ||
175 | switch (info->device_type) { | |
176 | case S5M8767X: | |
177 | case S5M8763X: | |
178 | ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val); | |
179 | val &= S5M_ALARM0_STATUS; | |
180 | break; | |
181 | default: | |
182 | return -EINVAL; | |
183 | } | |
184 | if (ret < 0) | |
185 | return ret; | |
186 | ||
187 | if (val) | |
188 | alarm->pending = 1; | |
189 | else | |
190 | alarm->pending = 0; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
5bccae6e SK |
195 | static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) |
196 | { | |
197 | int ret; | |
198 | unsigned int data; | |
199 | ||
f8b23bbd | 200 | ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); |
5bccae6e SK |
201 | if (ret < 0) { |
202 | dev_err(info->dev, "failed to read update reg(%d)\n", ret); | |
203 | return ret; | |
204 | } | |
205 | ||
602cb5bb | 206 | data |= S5M_RTC_TIME_EN_MASK; |
f8b23bbd | 207 | data |= info->regs->rtc_udr_mask; |
5bccae6e | 208 | |
f8b23bbd | 209 | ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); |
5bccae6e SK |
210 | if (ret < 0) { |
211 | dev_err(info->dev, "failed to write update reg(%d)\n", ret); | |
212 | return ret; | |
213 | } | |
214 | ||
d73238d4 | 215 | ret = s5m8767_wait_for_udr_update(info); |
5bccae6e SK |
216 | |
217 | return ret; | |
218 | } | |
219 | ||
220 | static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) | |
221 | { | |
222 | int ret; | |
223 | unsigned int data; | |
224 | ||
f8b23bbd | 225 | ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); |
5bccae6e SK |
226 | if (ret < 0) { |
227 | dev_err(info->dev, "%s: fail to read update reg(%d)\n", | |
228 | __func__, ret); | |
229 | return ret; | |
230 | } | |
231 | ||
602cb5bb | 232 | data &= ~S5M_RTC_TIME_EN_MASK; |
f8b23bbd | 233 | data |= info->regs->rtc_udr_mask; |
5bccae6e | 234 | |
f8b23bbd | 235 | ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); |
5bccae6e SK |
236 | if (ret < 0) { |
237 | dev_err(info->dev, "%s: fail to write update reg(%d)\n", | |
238 | __func__, ret); | |
239 | return ret; | |
240 | } | |
241 | ||
d73238d4 | 242 | ret = s5m8767_wait_for_udr_update(info); |
5bccae6e SK |
243 | |
244 | return ret; | |
245 | } | |
246 | ||
247 | static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm) | |
248 | { | |
249 | tm->tm_sec = bcd2bin(data[RTC_SEC]); | |
250 | tm->tm_min = bcd2bin(data[RTC_MIN]); | |
251 | ||
252 | if (data[RTC_HOUR] & HOUR_12) { | |
253 | tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f); | |
254 | if (data[RTC_HOUR] & HOUR_PM) | |
255 | tm->tm_hour += 12; | |
256 | } else { | |
257 | tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f); | |
258 | } | |
259 | ||
260 | tm->tm_wday = data[RTC_WEEKDAY] & 0x07; | |
261 | tm->tm_mday = bcd2bin(data[RTC_DATE]); | |
262 | tm->tm_mon = bcd2bin(data[RTC_MONTH]); | |
263 | tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100; | |
264 | tm->tm_year -= 1900; | |
265 | } | |
266 | ||
267 | static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data) | |
268 | { | |
269 | data[RTC_SEC] = bin2bcd(tm->tm_sec); | |
270 | data[RTC_MIN] = bin2bcd(tm->tm_min); | |
271 | data[RTC_HOUR] = bin2bcd(tm->tm_hour); | |
272 | data[RTC_WEEKDAY] = tm->tm_wday; | |
273 | data[RTC_DATE] = bin2bcd(tm->tm_mday); | |
274 | data[RTC_MONTH] = bin2bcd(tm->tm_mon); | |
275 | data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100); | |
276 | data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100); | |
277 | } | |
278 | ||
279 | static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
280 | { | |
281 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
f8b23bbd | 282 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
283 | int ret; |
284 | ||
f8b23bbd KK |
285 | ret = regmap_bulk_read(info->regmap, info->regs->time, data, |
286 | info->regs->regs_count); | |
5bccae6e SK |
287 | if (ret < 0) |
288 | return ret; | |
289 | ||
290 | switch (info->device_type) { | |
291 | case S5M8763X: | |
292 | s5m8763_data_to_tm(data, tm); | |
293 | break; | |
294 | ||
295 | case S5M8767X: | |
296 | s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); | |
297 | break; | |
298 | ||
299 | default: | |
300 | return -EINVAL; | |
301 | } | |
302 | ||
303 | dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, | |
304 | 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, | |
305 | tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); | |
306 | ||
307 | return rtc_valid_tm(tm); | |
308 | } | |
309 | ||
310 | static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
311 | { | |
312 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
f8b23bbd | 313 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
314 | int ret = 0; |
315 | ||
316 | switch (info->device_type) { | |
317 | case S5M8763X: | |
318 | s5m8763_tm_to_data(tm, data); | |
319 | break; | |
320 | case S5M8767X: | |
321 | ret = s5m8767_tm_to_data(tm, data); | |
322 | break; | |
323 | default: | |
324 | return -EINVAL; | |
325 | } | |
326 | ||
327 | if (ret < 0) | |
328 | return ret; | |
329 | ||
330 | dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, | |
331 | 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, | |
332 | tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); | |
333 | ||
f8b23bbd KK |
334 | ret = regmap_raw_write(info->regmap, info->regs->time, data, |
335 | info->regs->regs_count); | |
5bccae6e SK |
336 | if (ret < 0) |
337 | return ret; | |
338 | ||
339 | ret = s5m8767_rtc_set_time_reg(info); | |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
344 | static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
345 | { | |
346 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
f8b23bbd | 347 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
348 | unsigned int val; |
349 | int ret, i; | |
350 | ||
f8b23bbd KK |
351 | ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, |
352 | info->regs->regs_count); | |
5bccae6e SK |
353 | if (ret < 0) |
354 | return ret; | |
355 | ||
356 | switch (info->device_type) { | |
357 | case S5M8763X: | |
358 | s5m8763_data_to_tm(data, &alrm->time); | |
602cb5bb | 359 | ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val); |
5bccae6e SK |
360 | if (ret < 0) |
361 | return ret; | |
362 | ||
363 | alrm->enabled = !!val; | |
5bccae6e SK |
364 | break; |
365 | ||
366 | case S5M8767X: | |
367 | s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); | |
5bccae6e | 368 | alrm->enabled = 0; |
f8b23bbd | 369 | for (i = 0; i < info->regs->regs_count; i++) { |
5bccae6e SK |
370 | if (data[i] & ALARM_ENABLE_MASK) { |
371 | alrm->enabled = 1; | |
372 | break; | |
373 | } | |
374 | } | |
5bccae6e SK |
375 | break; |
376 | ||
377 | default: | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
f8b23bbd KK |
381 | dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, |
382 | 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, | |
383 | alrm->time.tm_mday, alrm->time.tm_hour, | |
384 | alrm->time.tm_min, alrm->time.tm_sec, | |
385 | alrm->time.tm_wday); | |
386 | ||
387 | ret = s5m_check_peding_alarm_interrupt(info, alrm); | |
5bccae6e SK |
388 | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) | |
393 | { | |
f8b23bbd | 394 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
395 | int ret, i; |
396 | struct rtc_time tm; | |
397 | ||
f8b23bbd KK |
398 | ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, |
399 | info->regs->regs_count); | |
5bccae6e SK |
400 | if (ret < 0) |
401 | return ret; | |
402 | ||
403 | s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); | |
404 | dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, | |
405 | 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, | |
406 | tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); | |
407 | ||
408 | switch (info->device_type) { | |
409 | case S5M8763X: | |
602cb5bb | 410 | ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0); |
5bccae6e SK |
411 | break; |
412 | ||
413 | case S5M8767X: | |
f8b23bbd | 414 | for (i = 0; i < info->regs->regs_count; i++) |
5bccae6e SK |
415 | data[i] &= ~ALARM_ENABLE_MASK; |
416 | ||
f8b23bbd KK |
417 | ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, |
418 | info->regs->regs_count); | |
5bccae6e SK |
419 | if (ret < 0) |
420 | return ret; | |
421 | ||
422 | ret = s5m8767_rtc_set_alarm_reg(info); | |
423 | ||
424 | break; | |
425 | ||
426 | default: | |
427 | return -EINVAL; | |
428 | } | |
429 | ||
430 | return ret; | |
431 | } | |
432 | ||
433 | static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) | |
434 | { | |
435 | int ret; | |
f8b23bbd | 436 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
437 | u8 alarm0_conf; |
438 | struct rtc_time tm; | |
439 | ||
f8b23bbd KK |
440 | ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, |
441 | info->regs->regs_count); | |
5bccae6e SK |
442 | if (ret < 0) |
443 | return ret; | |
444 | ||
445 | s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); | |
446 | dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, | |
447 | 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, | |
448 | tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); | |
449 | ||
450 | switch (info->device_type) { | |
451 | case S5M8763X: | |
452 | alarm0_conf = 0x77; | |
602cb5bb | 453 | ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf); |
5bccae6e SK |
454 | break; |
455 | ||
456 | case S5M8767X: | |
457 | data[RTC_SEC] |= ALARM_ENABLE_MASK; | |
458 | data[RTC_MIN] |= ALARM_ENABLE_MASK; | |
459 | data[RTC_HOUR] |= ALARM_ENABLE_MASK; | |
460 | data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; | |
461 | if (data[RTC_DATE] & 0x1f) | |
462 | data[RTC_DATE] |= ALARM_ENABLE_MASK; | |
463 | if (data[RTC_MONTH] & 0xf) | |
464 | data[RTC_MONTH] |= ALARM_ENABLE_MASK; | |
465 | if (data[RTC_YEAR1] & 0x7f) | |
466 | data[RTC_YEAR1] |= ALARM_ENABLE_MASK; | |
467 | ||
f8b23bbd KK |
468 | ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, |
469 | info->regs->regs_count); | |
5bccae6e SK |
470 | if (ret < 0) |
471 | return ret; | |
472 | ret = s5m8767_rtc_set_alarm_reg(info); | |
473 | ||
474 | break; | |
475 | ||
476 | default: | |
477 | return -EINVAL; | |
478 | } | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
483 | static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
484 | { | |
485 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
f8b23bbd | 486 | u8 data[info->regs->regs_count]; |
5bccae6e SK |
487 | int ret; |
488 | ||
489 | switch (info->device_type) { | |
490 | case S5M8763X: | |
491 | s5m8763_tm_to_data(&alrm->time, data); | |
492 | break; | |
493 | ||
494 | case S5M8767X: | |
495 | s5m8767_tm_to_data(&alrm->time, data); | |
496 | break; | |
497 | ||
498 | default: | |
499 | return -EINVAL; | |
500 | } | |
501 | ||
502 | dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, | |
503 | 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, | |
504 | alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min, | |
505 | alrm->time.tm_sec, alrm->time.tm_wday); | |
506 | ||
507 | ret = s5m_rtc_stop_alarm(info); | |
508 | if (ret < 0) | |
509 | return ret; | |
510 | ||
f8b23bbd KK |
511 | ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, |
512 | info->regs->regs_count); | |
5bccae6e SK |
513 | if (ret < 0) |
514 | return ret; | |
515 | ||
516 | ret = s5m8767_rtc_set_alarm_reg(info); | |
517 | if (ret < 0) | |
518 | return ret; | |
519 | ||
520 | if (alrm->enabled) | |
521 | ret = s5m_rtc_start_alarm(info); | |
522 | ||
523 | return ret; | |
524 | } | |
525 | ||
526 | static int s5m_rtc_alarm_irq_enable(struct device *dev, | |
527 | unsigned int enabled) | |
528 | { | |
529 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
530 | ||
531 | if (enabled) | |
532 | return s5m_rtc_start_alarm(info); | |
533 | else | |
534 | return s5m_rtc_stop_alarm(info); | |
535 | } | |
536 | ||
537 | static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data) | |
538 | { | |
539 | struct s5m_rtc_info *info = data; | |
540 | ||
541 | rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); | |
542 | ||
543 | return IRQ_HANDLED; | |
544 | } | |
545 | ||
546 | static const struct rtc_class_ops s5m_rtc_ops = { | |
547 | .read_time = s5m_rtc_read_time, | |
548 | .set_time = s5m_rtc_set_time, | |
549 | .read_alarm = s5m_rtc_read_alarm, | |
550 | .set_alarm = s5m_rtc_set_alarm, | |
551 | .alarm_irq_enable = s5m_rtc_alarm_irq_enable, | |
552 | }; | |
553 | ||
554 | static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable) | |
555 | { | |
556 | int ret; | |
f8b23bbd | 557 | ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, |
5bccae6e SK |
558 | WTSR_ENABLE_MASK, |
559 | enable ? WTSR_ENABLE_MASK : 0); | |
560 | if (ret < 0) | |
561 | dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", | |
562 | __func__, ret); | |
563 | } | |
564 | ||
565 | static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable) | |
566 | { | |
567 | int ret; | |
f8b23bbd | 568 | ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, |
5bccae6e SK |
569 | SMPL_ENABLE_MASK, |
570 | enable ? SMPL_ENABLE_MASK : 0); | |
571 | if (ret < 0) | |
572 | dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", | |
573 | __func__, ret); | |
574 | } | |
575 | ||
576 | static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) | |
577 | { | |
578 | u8 data[2]; | |
5bccae6e | 579 | int ret; |
5bccae6e | 580 | |
0c5f5d9a KK |
581 | /* UDR update time. Default of 7.32 ms is too long. */ |
582 | ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON, | |
583 | S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US); | |
584 | if (ret < 0) | |
585 | dev_err(info->dev, "%s: fail to change UDR time: %d\n", | |
586 | __func__, ret); | |
587 | ||
5bccae6e SK |
588 | /* Set RTC control register : Binary mode, 24hour mode */ |
589 | data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); | |
590 | data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); | |
591 | ||
592 | info->rtc_24hr_mode = 1; | |
602cb5bb | 593 | ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2); |
5bccae6e SK |
594 | if (ret < 0) { |
595 | dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", | |
596 | __func__, ret); | |
597 | return ret; | |
598 | } | |
599 | ||
5bccae6e SK |
600 | return ret; |
601 | } | |
602 | ||
603 | static int s5m_rtc_probe(struct platform_device *pdev) | |
604 | { | |
605 | struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); | |
606 | struct sec_platform_data *pdata = s5m87xx->pdata; | |
607 | struct s5m_rtc_info *info; | |
e349c910 | 608 | const struct regmap_config *regmap_cfg; |
5bccae6e SK |
609 | int ret; |
610 | ||
611 | if (!pdata) { | |
612 | dev_err(pdev->dev.parent, "Platform data not supplied\n"); | |
613 | return -ENODEV; | |
614 | } | |
615 | ||
616 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
617 | if (!info) | |
618 | return -ENOMEM; | |
619 | ||
e349c910 KK |
620 | switch (pdata->device_type) { |
621 | case S2MPS14X: | |
622 | regmap_cfg = &s2mps14_rtc_regmap_config; | |
623 | break; | |
624 | case S5M8763X: | |
625 | regmap_cfg = &s5m_rtc_regmap_config; | |
f8b23bbd | 626 | info->regs = &s5m_rtc_regs; |
e349c910 KK |
627 | break; |
628 | case S5M8767X: | |
629 | regmap_cfg = &s5m_rtc_regmap_config; | |
f8b23bbd | 630 | info->regs = &s5m_rtc_regs; |
e349c910 KK |
631 | break; |
632 | default: | |
633 | dev_err(&pdev->dev, "Device type is not supported by RTC driver\n"); | |
634 | return -ENODEV; | |
635 | } | |
636 | ||
637 | info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR); | |
638 | if (!info->i2c) { | |
639 | dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n"); | |
640 | return -ENODEV; | |
641 | } | |
642 | ||
643 | info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg); | |
644 | if (IS_ERR(info->regmap)) { | |
645 | ret = PTR_ERR(info->regmap); | |
646 | dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n", | |
647 | ret); | |
648 | goto err; | |
649 | } | |
650 | ||
5bccae6e SK |
651 | info->dev = &pdev->dev; |
652 | info->s5m87xx = s5m87xx; | |
5bccae6e SK |
653 | info->device_type = s5m87xx->device_type; |
654 | info->wtsr_smpl = s5m87xx->wtsr_smpl; | |
655 | ||
656 | switch (pdata->device_type) { | |
657 | case S5M8763X: | |
7b003be8 KK |
658 | info->irq = regmap_irq_get_virq(s5m87xx->irq_data, |
659 | S5M8763_IRQ_ALARM0); | |
5bccae6e SK |
660 | break; |
661 | ||
662 | case S5M8767X: | |
7b003be8 KK |
663 | info->irq = regmap_irq_get_virq(s5m87xx->irq_data, |
664 | S5M8767_IRQ_RTCA1); | |
5bccae6e SK |
665 | break; |
666 | ||
667 | default: | |
668 | ret = -EINVAL; | |
669 | dev_err(&pdev->dev, "Unsupported device type: %d\n", ret); | |
e349c910 | 670 | goto err; |
5bccae6e SK |
671 | } |
672 | ||
673 | platform_set_drvdata(pdev, info); | |
674 | ||
675 | ret = s5m8767_rtc_init_reg(info); | |
676 | ||
677 | if (info->wtsr_smpl) { | |
678 | s5m_rtc_enable_wtsr(info, true); | |
679 | s5m_rtc_enable_smpl(info, true); | |
680 | } | |
681 | ||
682 | device_init_wakeup(&pdev->dev, 1); | |
683 | ||
684 | info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", | |
685 | &s5m_rtc_ops, THIS_MODULE); | |
686 | ||
e349c910 KK |
687 | if (IS_ERR(info->rtc_dev)) { |
688 | ret = PTR_ERR(info->rtc_dev); | |
689 | goto err; | |
690 | } | |
5bccae6e SK |
691 | |
692 | ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, | |
693 | s5m_rtc_alarm_irq, 0, "rtc-alarm0", | |
694 | info); | |
e349c910 | 695 | if (ret < 0) { |
5bccae6e SK |
696 | dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", |
697 | info->irq, ret); | |
e349c910 KK |
698 | goto err; |
699 | } | |
700 | ||
701 | return 0; | |
702 | ||
703 | err: | |
704 | i2c_unregister_device(info->i2c); | |
5bccae6e SK |
705 | |
706 | return ret; | |
707 | } | |
708 | ||
709 | static void s5m_rtc_shutdown(struct platform_device *pdev) | |
710 | { | |
711 | struct s5m_rtc_info *info = platform_get_drvdata(pdev); | |
712 | int i; | |
713 | unsigned int val = 0; | |
714 | if (info->wtsr_smpl) { | |
715 | for (i = 0; i < 3; i++) { | |
716 | s5m_rtc_enable_wtsr(info, false); | |
f8b23bbd | 717 | regmap_read(info->regmap, info->regs->smpl_wtsr, &val); |
5bccae6e SK |
718 | pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); |
719 | if (val & WTSR_ENABLE_MASK) | |
720 | pr_emerg("%s: fail to disable WTSR\n", | |
721 | __func__); | |
722 | else { | |
723 | pr_info("%s: success to disable WTSR\n", | |
724 | __func__); | |
725 | break; | |
726 | } | |
727 | } | |
728 | } | |
729 | /* Disable SMPL when power off */ | |
730 | s5m_rtc_enable_smpl(info, false); | |
731 | } | |
732 | ||
e349c910 KK |
733 | static int s5m_rtc_remove(struct platform_device *pdev) |
734 | { | |
735 | struct s5m_rtc_info *info = platform_get_drvdata(pdev); | |
736 | ||
737 | /* Perform also all shutdown steps when removing */ | |
738 | s5m_rtc_shutdown(pdev); | |
739 | i2c_unregister_device(info->i2c); | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
11ba5a1e | 744 | #ifdef CONFIG_PM_SLEEP |
222ead7f KK |
745 | static int s5m_rtc_resume(struct device *dev) |
746 | { | |
747 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
748 | int ret = 0; | |
749 | ||
750 | if (device_may_wakeup(dev)) | |
751 | ret = disable_irq_wake(info->irq); | |
752 | ||
753 | return ret; | |
754 | } | |
755 | ||
756 | static int s5m_rtc_suspend(struct device *dev) | |
757 | { | |
758 | struct s5m_rtc_info *info = dev_get_drvdata(dev); | |
759 | int ret = 0; | |
760 | ||
761 | if (device_may_wakeup(dev)) | |
762 | ret = enable_irq_wake(info->irq); | |
763 | ||
764 | return ret; | |
765 | } | |
11ba5a1e | 766 | #endif /* CONFIG_PM_SLEEP */ |
222ead7f KK |
767 | |
768 | static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume); | |
769 | ||
5bccae6e SK |
770 | static const struct platform_device_id s5m_rtc_id[] = { |
771 | { "s5m-rtc", 0 }, | |
772 | }; | |
773 | ||
774 | static struct platform_driver s5m_rtc_driver = { | |
775 | .driver = { | |
776 | .name = "s5m-rtc", | |
777 | .owner = THIS_MODULE, | |
222ead7f | 778 | .pm = &s5m_rtc_pm_ops, |
5bccae6e SK |
779 | }, |
780 | .probe = s5m_rtc_probe, | |
e349c910 | 781 | .remove = s5m_rtc_remove, |
5bccae6e SK |
782 | .shutdown = s5m_rtc_shutdown, |
783 | .id_table = s5m_rtc_id, | |
784 | }; | |
785 | ||
786 | module_platform_driver(s5m_rtc_driver); | |
787 | ||
788 | /* Module information */ | |
789 | MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); | |
790 | MODULE_DESCRIPTION("Samsung S5M RTC driver"); | |
791 | MODULE_LICENSE("GPL"); | |
792 | MODULE_ALIAS("platform:s5m-rtc"); |