blob: 85649861a6b03c6b67f55c2918d1c36b694d628b [file] [log] [blame]
Sangbeom Kim5bccae62013-11-12 15:11:04 -08001/*
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -07002 * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd
Sangbeom Kim5bccae62013-11-12 15:11:04 -08003 * 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
Joe Perchesa737e832015-04-16 12:46:14 -070018#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
Sangbeom Kim5bccae62013-11-12 15:11:04 -080020#include <linux/module.h>
21#include <linux/i2c.h>
Sangbeom Kim5bccae62013-11-12 15:11:04 -080022#include <linux/bcd.h>
Sangbeom Kim5bccae62013-11-12 15:11:04 -080023#include <linux/regmap.h>
24#include <linux/rtc.h>
Sangbeom Kim5bccae62013-11-12 15:11:04 -080025#include <linux/platform_device.h>
26#include <linux/mfd/samsung/core.h>
27#include <linux/mfd/samsung/irq.h>
28#include <linux/mfd/samsung/rtc.h>
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -070029#include <linux/mfd/samsung/s2mps14.h>
Sangbeom Kim5bccae62013-11-12 15:11:04 -080030
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080031/*
32 * Maximum number of retries for checking changes in UDR field
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -070033 * of S5M_RTC_UDR_CON register (to limit possible endless loop).
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080034 *
35 * After writing to RTC registers (setting time or alarm) read the UDR field
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -070036 * in S5M_RTC_UDR_CON register. UDR is auto-cleared when data have
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080037 * been transferred.
38 */
39#define UDR_READ_RETRY_CNT 5
40
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070041/* Registers used by the driver which are different between chipsets. */
42struct 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;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070053 /*
54 * Register for update flag (UDR). Typically setting UDR field to 1
55 * will enable update of time or alarm register. Then it will be
56 * auto-cleared after successful update.
57 */
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +090058 unsigned int udr_update;
59 /* Mask for UDR field in 'udr_update' register */
60 unsigned int udr_mask;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070061};
62
63/* Register map for S5M8763 and S5M8767 */
64static const struct s5m_rtc_reg_config s5m_rtc_regs = {
65 .regs_count = 8,
66 .time = S5M_RTC_SEC,
67 .ctrl = S5M_ALARM1_CONF,
68 .alarm0 = S5M_ALARM0_SEC,
69 .alarm1 = S5M_ALARM1_SEC,
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +090070 .udr_update = S5M_RTC_UDR_CON,
71 .udr_mask = S5M_RTC_UDR_MASK,
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070072};
73
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -070074/*
75 * Register map for S2MPS14.
76 * It may be also suitable for S2MPS11 but this was not tested.
77 */
78static const struct s5m_rtc_reg_config s2mps_rtc_regs = {
79 .regs_count = 7,
80 .time = S2MPS_RTC_SEC,
81 .ctrl = S2MPS_RTC_CTRL,
82 .alarm0 = S2MPS_ALARM0_SEC,
83 .alarm1 = S2MPS_ALARM1_SEC,
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +090084 .udr_update = S2MPS_RTC_UDR_CON,
85 .udr_mask = S2MPS_RTC_WUDR_MASK,
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -070086};
87
Sangbeom Kim5bccae62013-11-12 15:11:04 -080088struct s5m_rtc_info {
89 struct device *dev;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +020090 struct i2c_client *i2c;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080091 struct sec_pmic_dev *s5m87xx;
Geert Uytterhoeven5ccb7d72013-12-12 17:12:25 -080092 struct regmap *regmap;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080093 struct rtc_device *rtc_dev;
94 int irq;
Krzysztof Kozlowski94f91922015-04-16 12:49:27 -070095 enum sec_device_type device_type;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080096 int rtc_24hr_mode;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070097 const struct s5m_rtc_reg_config *regs;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080098};
99
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200100static const struct regmap_config s5m_rtc_regmap_config = {
101 .reg_bits = 8,
102 .val_bits = 8,
103
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700104 .max_register = S5M_RTC_REG_MAX,
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200105};
106
107static const struct regmap_config s2mps14_rtc_regmap_config = {
108 .reg_bits = 8,
109 .val_bits = 8,
110
111 .max_register = S2MPS_RTC_REG_MAX,
112};
113
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800114static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
115 int rtc_24hr_mode)
116{
117 tm->tm_sec = data[RTC_SEC] & 0x7f;
118 tm->tm_min = data[RTC_MIN] & 0x7f;
119 if (rtc_24hr_mode) {
120 tm->tm_hour = data[RTC_HOUR] & 0x1f;
121 } else {
122 tm->tm_hour = data[RTC_HOUR] & 0x0f;
123 if (data[RTC_HOUR] & HOUR_PM_MASK)
124 tm->tm_hour += 12;
125 }
126
127 tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
128 tm->tm_mday = data[RTC_DATE] & 0x1f;
129 tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
130 tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
131 tm->tm_yday = 0;
132 tm->tm_isdst = 0;
133}
134
135static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
136{
137 data[RTC_SEC] = tm->tm_sec;
138 data[RTC_MIN] = tm->tm_min;
139
140 if (tm->tm_hour >= 12)
141 data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
142 else
143 data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
144
145 data[RTC_WEEKDAY] = 1 << tm->tm_wday;
146 data[RTC_DATE] = tm->tm_mday;
147 data[RTC_MONTH] = tm->tm_mon + 1;
148 data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
149
150 if (tm->tm_year < 100) {
Joe Perchesa737e832015-04-16 12:46:14 -0700151 pr_err("RTC cannot handle the year %d\n",
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800152 1900 + tm->tm_year);
153 return -EINVAL;
154 } else {
155 return 0;
156 }
157}
158
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800159/*
160 * Read RTC_UDR_CON register and wait till UDR field is cleared.
161 * This indicates that time/alarm update ended.
162 */
163static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
164{
165 int ret, retry = UDR_READ_RETRY_CNT;
166 unsigned int data;
167
168 do {
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900169 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
170 } while (--retry && (data & info->regs->udr_mask) && !ret);
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800171
172 if (!retry)
173 dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
174
175 return ret;
176}
177
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700178static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info,
179 struct rtc_wkalrm *alarm)
180{
181 int ret;
182 unsigned int val;
183
184 switch (info->device_type) {
185 case S5M8767X:
186 case S5M8763X:
187 ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val);
188 val &= S5M_ALARM0_STATUS;
189 break;
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530190 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700191 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700192 case S2MPS13X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700193 ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2,
194 &val);
195 val &= S2MPS_ALARM0_STATUS;
196 break;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700197 default:
198 return -EINVAL;
199 }
200 if (ret < 0)
201 return ret;
202
203 if (val)
204 alarm->pending = 1;
205 else
206 alarm->pending = 0;
207
208 return 0;
209}
210
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800211static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
212{
213 int ret;
214 unsigned int data;
215
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900216 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800217 if (ret < 0) {
218 dev_err(info->dev, "failed to read update reg(%d)\n", ret);
219 return ret;
220 }
221
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530222 switch (info->device_type) {
223 case S5M8763X:
224 case S5M8767X:
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900225 data |= info->regs->udr_mask | S5M_RTC_TIME_EN_MASK;
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530226 case S2MPS15X:
227 /* As per UM, for write time register, set WUDR bit to high */
228 data |= S2MPS15_RTC_WUDR_MASK;
229 break;
230 case S2MPS14X:
231 case S2MPS13X:
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900232 data |= info->regs->udr_mask;
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530233 break;
234 default:
235 return -EINVAL;
236 }
237
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900238 ret = regmap_write(info->regmap, info->regs->udr_update, data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800239 if (ret < 0) {
240 dev_err(info->dev, "failed to write update reg(%d)\n", ret);
241 return ret;
242 }
243
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800244 ret = s5m8767_wait_for_udr_update(info);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800245
246 return ret;
247}
248
249static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
250{
251 int ret;
252 unsigned int data;
253
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900254 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800255 if (ret < 0) {
256 dev_err(info->dev, "%s: fail to read update reg(%d)\n",
257 __func__, ret);
258 return ret;
259 }
260
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900261 data |= info->regs->udr_mask;
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700262 switch (info->device_type) {
263 case S5M8763X:
264 case S5M8767X:
265 data &= ~S5M_RTC_TIME_EN_MASK;
266 break;
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530267 case S2MPS15X:
268 /* As per UM, for write alarm, set A_UDR(bit[4]) to high
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900269 * udr_mask above sets bit[4]
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530270 */
271 break;
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700272 case S2MPS14X:
273 data |= S2MPS_RTC_RUDR_MASK;
274 break;
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700275 case S2MPS13X:
276 data |= S2MPS13_RTC_AUDR_MASK;
277 break;
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700278 default:
279 return -EINVAL;
280 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800281
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900282 ret = regmap_write(info->regmap, info->regs->udr_update, data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800283 if (ret < 0) {
284 dev_err(info->dev, "%s: fail to write update reg(%d)\n",
285 __func__, ret);
286 return ret;
287 }
288
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800289 ret = s5m8767_wait_for_udr_update(info);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800290
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700291 /* On S2MPS13 the AUDR is not auto-cleared */
292 if (info->device_type == S2MPS13X)
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900293 regmap_update_bits(info->regmap, info->regs->udr_update,
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700294 S2MPS13_RTC_AUDR_MASK, 0);
295
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800296 return ret;
297}
298
299static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
300{
301 tm->tm_sec = bcd2bin(data[RTC_SEC]);
302 tm->tm_min = bcd2bin(data[RTC_MIN]);
303
304 if (data[RTC_HOUR] & HOUR_12) {
305 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
306 if (data[RTC_HOUR] & HOUR_PM)
307 tm->tm_hour += 12;
308 } else {
309 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
310 }
311
312 tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
313 tm->tm_mday = bcd2bin(data[RTC_DATE]);
314 tm->tm_mon = bcd2bin(data[RTC_MONTH]);
315 tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
316 tm->tm_year -= 1900;
317}
318
319static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
320{
321 data[RTC_SEC] = bin2bcd(tm->tm_sec);
322 data[RTC_MIN] = bin2bcd(tm->tm_min);
323 data[RTC_HOUR] = bin2bcd(tm->tm_hour);
324 data[RTC_WEEKDAY] = tm->tm_wday;
325 data[RTC_DATE] = bin2bcd(tm->tm_mday);
326 data[RTC_MONTH] = bin2bcd(tm->tm_mon);
327 data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
328 data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
329}
330
331static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
332{
333 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700334 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800335 int ret;
336
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530337 if (info->device_type == S2MPS15X || info->device_type == S2MPS14X ||
338 info->device_type == S2MPS13X) {
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700339 ret = regmap_update_bits(info->regmap,
Krzysztof Kozlowskia83a7932015-12-30 13:47:25 +0900340 info->regs->udr_update,
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700341 S2MPS_RTC_RUDR_MASK, S2MPS_RTC_RUDR_MASK);
342 if (ret) {
343 dev_err(dev,
344 "Failed to prepare registers for time reading: %d\n",
345 ret);
346 return ret;
347 }
348 }
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700349 ret = regmap_bulk_read(info->regmap, info->regs->time, data,
350 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800351 if (ret < 0)
352 return ret;
353
354 switch (info->device_type) {
355 case S5M8763X:
356 s5m8763_data_to_tm(data, tm);
357 break;
358
359 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530360 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700361 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700362 case S2MPS13X:
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800363 s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
364 break;
365
366 default:
367 return -EINVAL;
368 }
369
370 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
371 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
372 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
373
374 return rtc_valid_tm(tm);
375}
376
377static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
378{
379 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700380 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800381 int ret = 0;
382
383 switch (info->device_type) {
384 case S5M8763X:
385 s5m8763_tm_to_data(tm, data);
386 break;
387 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530388 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700389 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700390 case S2MPS13X:
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800391 ret = s5m8767_tm_to_data(tm, data);
392 break;
393 default:
394 return -EINVAL;
395 }
396
397 if (ret < 0)
398 return ret;
399
400 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
401 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
402 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
403
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700404 ret = regmap_raw_write(info->regmap, info->regs->time, data,
405 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800406 if (ret < 0)
407 return ret;
408
409 ret = s5m8767_rtc_set_time_reg(info);
410
411 return ret;
412}
413
414static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
415{
416 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700417 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800418 unsigned int val;
419 int ret, i;
420
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700421 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
422 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800423 if (ret < 0)
424 return ret;
425
426 switch (info->device_type) {
427 case S5M8763X:
428 s5m8763_data_to_tm(data, &alrm->time);
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700429 ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800430 if (ret < 0)
431 return ret;
432
433 alrm->enabled = !!val;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800434 break;
435
436 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530437 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700438 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700439 case S2MPS13X:
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800440 s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800441 alrm->enabled = 0;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700442 for (i = 0; i < info->regs->regs_count; i++) {
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800443 if (data[i] & ALARM_ENABLE_MASK) {
444 alrm->enabled = 1;
445 break;
446 }
447 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800448 break;
449
450 default:
451 return -EINVAL;
452 }
453
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700454 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
455 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
456 alrm->time.tm_mday, alrm->time.tm_hour,
457 alrm->time.tm_min, alrm->time.tm_sec,
458 alrm->time.tm_wday);
459
460 ret = s5m_check_peding_alarm_interrupt(info, alrm);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800461
462 return 0;
463}
464
465static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
466{
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700467 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800468 int ret, i;
469 struct rtc_time tm;
470
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700471 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
472 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800473 if (ret < 0)
474 return ret;
475
476 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
477 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
478 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
479 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
480
481 switch (info->device_type) {
482 case S5M8763X:
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700483 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800484 break;
485
486 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530487 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700488 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700489 case S2MPS13X:
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700490 for (i = 0; i < info->regs->regs_count; i++)
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800491 data[i] &= ~ALARM_ENABLE_MASK;
492
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700493 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
494 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800495 if (ret < 0)
496 return ret;
497
498 ret = s5m8767_rtc_set_alarm_reg(info);
499
500 break;
501
502 default:
503 return -EINVAL;
504 }
505
506 return ret;
507}
508
509static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
510{
511 int ret;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700512 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800513 u8 alarm0_conf;
514 struct rtc_time tm;
515
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700516 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
517 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800518 if (ret < 0)
519 return ret;
520
521 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
522 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
523 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
524 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
525
526 switch (info->device_type) {
527 case S5M8763X:
528 alarm0_conf = 0x77;
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700529 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800530 break;
531
532 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530533 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700534 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700535 case S2MPS13X:
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800536 data[RTC_SEC] |= ALARM_ENABLE_MASK;
537 data[RTC_MIN] |= ALARM_ENABLE_MASK;
538 data[RTC_HOUR] |= ALARM_ENABLE_MASK;
539 data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
540 if (data[RTC_DATE] & 0x1f)
541 data[RTC_DATE] |= ALARM_ENABLE_MASK;
542 if (data[RTC_MONTH] & 0xf)
543 data[RTC_MONTH] |= ALARM_ENABLE_MASK;
544 if (data[RTC_YEAR1] & 0x7f)
545 data[RTC_YEAR1] |= ALARM_ENABLE_MASK;
546
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700547 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
548 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800549 if (ret < 0)
550 return ret;
551 ret = s5m8767_rtc_set_alarm_reg(info);
552
553 break;
554
555 default:
556 return -EINVAL;
557 }
558
559 return ret;
560}
561
562static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
563{
564 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700565 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800566 int ret;
567
568 switch (info->device_type) {
569 case S5M8763X:
570 s5m8763_tm_to_data(&alrm->time, data);
571 break;
572
573 case S5M8767X:
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530574 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700575 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700576 case S2MPS13X:
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800577 s5m8767_tm_to_data(&alrm->time, data);
578 break;
579
580 default:
581 return -EINVAL;
582 }
583
584 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
585 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
586 alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
587 alrm->time.tm_sec, alrm->time.tm_wday);
588
589 ret = s5m_rtc_stop_alarm(info);
590 if (ret < 0)
591 return ret;
592
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700593 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
594 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800595 if (ret < 0)
596 return ret;
597
598 ret = s5m8767_rtc_set_alarm_reg(info);
599 if (ret < 0)
600 return ret;
601
602 if (alrm->enabled)
603 ret = s5m_rtc_start_alarm(info);
604
605 return ret;
606}
607
608static int s5m_rtc_alarm_irq_enable(struct device *dev,
609 unsigned int enabled)
610{
611 struct s5m_rtc_info *info = dev_get_drvdata(dev);
612
613 if (enabled)
614 return s5m_rtc_start_alarm(info);
615 else
616 return s5m_rtc_stop_alarm(info);
617}
618
619static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
620{
621 struct s5m_rtc_info *info = data;
622
623 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
624
625 return IRQ_HANDLED;
626}
627
628static const struct rtc_class_ops s5m_rtc_ops = {
629 .read_time = s5m_rtc_read_time,
630 .set_time = s5m_rtc_set_time,
631 .read_alarm = s5m_rtc_read_alarm,
632 .set_alarm = s5m_rtc_set_alarm,
633 .alarm_irq_enable = s5m_rtc_alarm_irq_enable,
634};
635
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800636static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
637{
638 u8 data[2];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800639 int ret;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800640
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700641 switch (info->device_type) {
642 case S5M8763X:
643 case S5M8767X:
644 /* UDR update time. Default of 7.32 ms is too long. */
645 ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON,
646 S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US);
647 if (ret < 0)
648 dev_err(info->dev, "%s: fail to change UDR time: %d\n",
649 __func__, ret);
Krzysztof Kozlowski0c5f5d92014-06-10 15:18:43 -0700650
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700651 /* Set RTC control register : Binary mode, 24hour mode */
652 data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
653 data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
654
655 ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2);
656 break;
657
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530658 case S2MPS15X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700659 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700660 case S2MPS13X:
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700661 data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
662 ret = regmap_write(info->regmap, info->regs->ctrl, data[0]);
Joonyoung Shimff02c042015-08-21 18:43:41 +0900663 if (ret < 0)
664 break;
665
666 /*
667 * Should set WUDR & (RUDR or AUDR) bits to high after writing
668 * RTC_CTRL register like writing Alarm registers. We can't find
669 * the description from datasheet but vendor code does that
670 * really.
671 */
672 ret = s5m8767_rtc_set_alarm_reg(info);
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700673 break;
674
675 default:
676 return -EINVAL;
677 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800678
679 info->rtc_24hr_mode = 1;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800680 if (ret < 0) {
681 dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
682 __func__, ret);
683 return ret;
684 }
685
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800686 return ret;
687}
688
689static int s5m_rtc_probe(struct platform_device *pdev)
690{
691 struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
692 struct sec_platform_data *pdata = s5m87xx->pdata;
693 struct s5m_rtc_info *info;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200694 const struct regmap_config *regmap_cfg;
Krzysztof Kozlowskia0347f22014-06-10 15:18:47 -0700695 int ret, alarm_irq;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800696
697 if (!pdata) {
698 dev_err(pdev->dev.parent, "Platform data not supplied\n");
699 return -ENODEV;
700 }
701
702 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
703 if (!info)
704 return -ENOMEM;
705
Krzysztof Kozlowski94f91922015-04-16 12:49:27 -0700706 switch (platform_get_device_id(pdev)->driver_data) {
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530707 case S2MPS15X:
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200708 case S2MPS14X:
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700709 case S2MPS13X:
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200710 regmap_cfg = &s2mps14_rtc_regmap_config;
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700711 info->regs = &s2mps_rtc_regs;
Krzysztof Kozlowskia0347f22014-06-10 15:18:47 -0700712 alarm_irq = S2MPS14_IRQ_RTCA0;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200713 break;
714 case S5M8763X:
715 regmap_cfg = &s5m_rtc_regmap_config;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700716 info->regs = &s5m_rtc_regs;
Krzysztof Kozlowskia0347f22014-06-10 15:18:47 -0700717 alarm_irq = S5M8763_IRQ_ALARM0;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200718 break;
719 case S5M8767X:
720 regmap_cfg = &s5m_rtc_regmap_config;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700721 info->regs = &s5m_rtc_regs;
Krzysztof Kozlowskia0347f22014-06-10 15:18:47 -0700722 alarm_irq = S5M8767_IRQ_RTCA1;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200723 break;
724 default:
Krzysztof Kozlowski94f91922015-04-16 12:49:27 -0700725 dev_err(&pdev->dev,
726 "Device type %lu is not supported by RTC driver\n",
727 platform_get_device_id(pdev)->driver_data);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200728 return -ENODEV;
729 }
730
731 info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
732 if (!info->i2c) {
733 dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
734 return -ENODEV;
735 }
736
737 info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
738 if (IS_ERR(info->regmap)) {
739 ret = PTR_ERR(info->regmap);
740 dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
741 ret);
742 goto err;
743 }
744
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800745 info->dev = &pdev->dev;
746 info->s5m87xx = s5m87xx;
Krzysztof Kozlowski94f91922015-04-16 12:49:27 -0700747 info->device_type = platform_get_device_id(pdev)->driver_data;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800748
Bartlomiej Zolnierkiewiczb7d5b9a2014-08-29 15:18:53 -0700749 if (s5m87xx->irq_data) {
750 info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
751 if (info->irq <= 0) {
752 ret = -EINVAL;
753 dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
Krzysztof Kozlowskia0347f22014-06-10 15:18:47 -0700754 alarm_irq);
Bartlomiej Zolnierkiewiczb7d5b9a2014-08-29 15:18:53 -0700755 goto err;
756 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800757 }
758
759 platform_set_drvdata(pdev, info);
760
761 ret = s5m8767_rtc_init_reg(info);
762
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800763 device_init_wakeup(&pdev->dev, 1);
764
765 info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
766 &s5m_rtc_ops, THIS_MODULE);
767
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200768 if (IS_ERR(info->rtc_dev)) {
769 ret = PTR_ERR(info->rtc_dev);
770 goto err;
771 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800772
Bartlomiej Zolnierkiewiczb7d5b9a2014-08-29 15:18:53 -0700773 if (!info->irq) {
774 dev_info(&pdev->dev, "Alarm IRQ not available\n");
775 return 0;
776 }
777
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800778 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
779 s5m_rtc_alarm_irq, 0, "rtc-alarm0",
780 info);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200781 if (ret < 0) {
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800782 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
783 info->irq, ret);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200784 goto err;
785 }
786
787 return 0;
788
789err:
790 i2c_unregister_device(info->i2c);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800791
792 return ret;
793}
794
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200795static int s5m_rtc_remove(struct platform_device *pdev)
796{
797 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
798
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200799 i2c_unregister_device(info->i2c);
800
801 return 0;
802}
803
Geert Uytterhoeven11ba5a12014-01-23 15:55:19 -0800804#ifdef CONFIG_PM_SLEEP
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800805static int s5m_rtc_resume(struct device *dev)
806{
807 struct s5m_rtc_info *info = dev_get_drvdata(dev);
808 int ret = 0;
809
Bartlomiej Zolnierkiewiczb7d5b9a2014-08-29 15:18:53 -0700810 if (info->irq && device_may_wakeup(dev))
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800811 ret = disable_irq_wake(info->irq);
812
813 return ret;
814}
815
816static int s5m_rtc_suspend(struct device *dev)
817{
818 struct s5m_rtc_info *info = dev_get_drvdata(dev);
819 int ret = 0;
820
Bartlomiej Zolnierkiewiczb7d5b9a2014-08-29 15:18:53 -0700821 if (info->irq && device_may_wakeup(dev))
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800822 ret = enable_irq_wake(info->irq);
823
824 return ret;
825}
Geert Uytterhoeven11ba5a12014-01-23 15:55:19 -0800826#endif /* CONFIG_PM_SLEEP */
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800827
828static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
829
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800830static const struct platform_device_id s5m_rtc_id[] = {
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700831 { "s5m-rtc", S5M8767X },
Krzysztof Kozlowski5281f942015-04-16 12:45:45 -0700832 { "s2mps13-rtc", S2MPS13X },
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700833 { "s2mps14-rtc", S2MPS14X },
Alim Akhtara65e5ef2015-11-20 16:07:53 +0530834 { "s2mps15-rtc", S2MPS15X },
Andrey Ryabinin45cd15e2015-01-26 12:58:46 -0800835 { },
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800836};
Javier Martinez Canillas63074cc2015-08-27 12:34:32 +0200837MODULE_DEVICE_TABLE(platform, s5m_rtc_id);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800838
839static struct platform_driver s5m_rtc_driver = {
840 .driver = {
841 .name = "s5m-rtc",
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800842 .pm = &s5m_rtc_pm_ops,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800843 },
844 .probe = s5m_rtc_probe,
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200845 .remove = s5m_rtc_remove,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800846 .id_table = s5m_rtc_id,
847};
848
849module_platform_driver(s5m_rtc_driver);
850
851/* Module information */
852MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
Krzysztof Kozlowski0c5deb12014-06-10 15:18:46 -0700853MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver");
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800854MODULE_LICENSE("GPL");
855MODULE_ALIAS("platform:s5m-rtc");