diff options
Diffstat (limited to 'drivers/rtc/rtc-s5m.c')
| -rw-r--r-- | drivers/rtc/rtc-s5m.c | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c deleted file mode 100644 index b7fd02b..0000000 --- a/drivers/rtc/rtc-s5m.c +++ /dev/null @@ -1,635 +0,0 @@ -/* - * Copyright (c) 2013 Samsung Electronics Co., Ltd - * http://www.samsung.com - * - * Copyright (C) 2013 Google, Inc - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/bcd.h> -#include <linux/bitops.h> -#include <linux/regmap.h> -#include <linux/rtc.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/mfd/samsung/core.h> -#include <linux/mfd/samsung/irq.h> -#include <linux/mfd/samsung/rtc.h> - -struct s5m_rtc_info { - struct device *dev; - struct sec_pmic_dev *s5m87xx; - struct regmap *rtc; - struct rtc_device *rtc_dev; - int irq; - int device_type; - int rtc_24hr_mode; - bool wtsr_smpl; -}; - -static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, - int rtc_24hr_mode) -{ - tm->tm_sec = data[RTC_SEC] & 0x7f; - tm->tm_min = data[RTC_MIN] & 0x7f; - if (rtc_24hr_mode) { - tm->tm_hour = data[RTC_HOUR] & 0x1f; - } else { - tm->tm_hour = data[RTC_HOUR] & 0x0f; - if (data[RTC_HOUR] & HOUR_PM_MASK) - tm->tm_hour += 12; - } - - tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f); - tm->tm_mday = data[RTC_DATE] & 0x1f; - tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; - tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100; - tm->tm_yday = 0; - tm->tm_isdst = 0; -} - -static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data) -{ - data[RTC_SEC] = tm->tm_sec; - data[RTC_MIN] = tm->tm_min; - - if (tm->tm_hour >= 12) - data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK; - else - data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK; - - data[RTC_WEEKDAY] = 1 << tm->tm_wday; - data[RTC_DATE] = tm->tm_mday; - data[RTC_MONTH] = tm->tm_mon + 1; - data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; - - if (tm->tm_year < 100) { - pr_err("s5m8767 RTC cannot handle the year %d.\n", - 1900 + tm->tm_year); - return -EINVAL; - } else { - return 0; - } -} - -static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) -{ - int ret; - unsigned int data; - - ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data); - if (ret < 0) { - dev_err(info->dev, "failed to read update reg(%d)\n", ret); - return ret; - } - - data |= RTC_TIME_EN_MASK; - data |= RTC_UDR_MASK; - - ret = regmap_write(info->rtc, SEC_RTC_UDR_CON, data); - if (ret < 0) { - dev_err(info->dev, "failed to write update reg(%d)\n", ret); - return ret; - } - - do { - ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data); - } while ((data & RTC_UDR_MASK) && !ret); - - return ret; -} - -static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) -{ - int ret; - unsigned int data; - - ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data); - if (ret < 0) { - dev_err(info->dev, "%s: fail to read update reg(%d)\n", - __func__, ret); - return ret; - } - - data &= ~RTC_TIME_EN_MASK; - data |= RTC_UDR_MASK; - - ret = regmap_write(info->rtc, SEC_RTC_UDR_CON, data); - if (ret < 0) { - dev_err(info->dev, "%s: fail to write update reg(%d)\n", - __func__, ret); - return ret; - } - - do { - ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data); - } while ((data & RTC_UDR_MASK) && !ret); - - return ret; -} - -static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm) -{ - tm->tm_sec = bcd2bin(data[RTC_SEC]); - tm->tm_min = bcd2bin(data[RTC_MIN]); - - if (data[RTC_HOUR] & HOUR_12) { - tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f); - if (data[RTC_HOUR] & HOUR_PM) - tm->tm_hour += 12; - } else { - tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f); - } - - tm->tm_wday = data[RTC_WEEKDAY] & 0x07; - tm->tm_mday = bcd2bin(data[RTC_DATE]); - tm->tm_mon = bcd2bin(data[RTC_MONTH]); - tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100; - tm->tm_year -= 1900; -} - -static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data) -{ - data[RTC_SEC] = bin2bcd(tm->tm_sec); - data[RTC_MIN] = bin2bcd(tm->tm_min); - data[RTC_HOUR] = bin2bcd(tm->tm_hour); - data[RTC_WEEKDAY] = tm->tm_wday; - data[RTC_DATE] = bin2bcd(tm->tm_mday); - data[RTC_MONTH] = bin2bcd(tm->tm_mon); - data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100); - data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100); -} - -static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) -{ - struct s5m_rtc_info *info = dev_get_drvdata(dev); - u8 data[8]; - int ret; - - ret = regmap_bulk_read(info->rtc, SEC_RTC_SEC, data, 8); - if (ret < 0) - return ret; - - switch (info->device_type) { - case S5M8763X: - s5m8763_data_to_tm(data, tm); - break; - - case S5M8767X: - s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); - break; - - default: - return -EINVAL; - } - - dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); - - return rtc_valid_tm(tm); -} - -static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) -{ - struct s5m_rtc_info *info = dev_get_drvdata(dev); - u8 data[8]; - int ret = 0; - - switch (info->device_type) { - case S5M8763X: - s5m8763_tm_to_data(tm, data); - break; - case S5M8767X: - ret = s5m8767_tm_to_data(tm, data); - break; - default: - return -EINVAL; - } - - if (ret < 0) - return ret; - - dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); - - ret = regmap_raw_write(info->rtc, SEC_RTC_SEC, data, 8); - if (ret < 0) - return ret; - - ret = s5m8767_rtc_set_time_reg(info); - - return ret; -} - -static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) -{ - struct s5m_rtc_info *info = dev_get_drvdata(dev); - u8 data[8]; - unsigned int val; - int ret, i; - - ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - - switch (info->device_type) { - case S5M8763X: - s5m8763_data_to_tm(data, &alrm->time); - ret = regmap_read(info->rtc, SEC_ALARM0_CONF, &val); - if (ret < 0) - return ret; - - alrm->enabled = !!val; - - ret = regmap_read(info->rtc, SEC_RTC_STATUS, &val); - if (ret < 0) - return ret; - - break; - - case S5M8767X: - s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); - dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, - alrm->time.tm_mday, alrm->time.tm_hour, - alrm->time.tm_min, alrm->time.tm_sec, - alrm->time.tm_wday); - - alrm->enabled = 0; - for (i = 0; i < 7; i++) { - if (data[i] & ALARM_ENABLE_MASK) { - alrm->enabled = 1; - break; - } - } - - alrm->pending = 0; - ret = regmap_read(info->rtc, SEC_RTC_STATUS, &val); - if (ret < 0) - return ret; - break; - - default: - return -EINVAL; - } - - if (val & ALARM0_STATUS) - alrm->pending = 1; - else - alrm->pending = 0; - - return 0; -} - -static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) -{ - u8 data[8]; - int ret, i; - struct rtc_time tm; - - ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - - s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); - dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); - - switch (info->device_type) { - case S5M8763X: - ret = regmap_write(info->rtc, SEC_ALARM0_CONF, 0); - break; - - case S5M8767X: - for (i = 0; i < 7; i++) - data[i] &= ~ALARM_ENABLE_MASK; - - ret = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - - ret = s5m8767_rtc_set_alarm_reg(info); - - break; - - default: - return -EINVAL; - } - - return ret; -} - -static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) -{ - int ret; - u8 data[8]; - u8 alarm0_conf; - struct rtc_time tm; - - ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - - s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); - dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); - - switch (info->device_type) { - case S5M8763X: - alarm0_conf = 0x77; - ret = regmap_write(info->rtc, SEC_ALARM0_CONF, alarm0_conf); - break; - - case S5M8767X: - data[RTC_SEC] |= ALARM_ENABLE_MASK; - data[RTC_MIN] |= ALARM_ENABLE_MASK; - data[RTC_HOUR] |= ALARM_ENABLE_MASK; - data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; - if (data[RTC_DATE] & 0x1f) - data[RTC_DATE] |= ALARM_ENABLE_MASK; - if (data[RTC_MONTH] & 0xf) - data[RTC_MONTH] |= ALARM_ENABLE_MASK; - if (data[RTC_YEAR1] & 0x7f) - data[RTC_YEAR1] |= ALARM_ENABLE_MASK; - - ret = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - ret = s5m8767_rtc_set_alarm_reg(info); - - break; - - default: - return -EINVAL; - } - - return ret; -} - -static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) -{ - struct s5m_rtc_info *info = dev_get_drvdata(dev); - u8 data[8]; - int ret; - - switch (info->device_type) { - case S5M8763X: - s5m8763_tm_to_data(&alrm->time, data); - break; - - case S5M8767X: - s5m8767_tm_to_data(&alrm->time, data); - break; - - default: - return -EINVAL; - } - - dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, - 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, - alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min, - alrm->time.tm_sec, alrm->time.tm_wday); - - ret = s5m_rtc_stop_alarm(info); - if (ret < 0) - return ret; - - ret = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8); - if (ret < 0) - return ret; - - ret = s5m8767_rtc_set_alarm_reg(info); - if (ret < 0) - return ret; - - if (alrm->enabled) - ret = s5m_rtc_start_alarm(info); - - return ret; -} - -static int s5m_rtc_alarm_irq_enable(struct device *dev, - unsigned int enabled) -{ - struct s5m_rtc_info *info = dev_get_drvdata(dev); - - if (enabled) - return s5m_rtc_start_alarm(info); - else - return s5m_rtc_stop_alarm(info); -} - -static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data) -{ - struct s5m_rtc_info *info = data; - - rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); - - return IRQ_HANDLED; -} - -static const struct rtc_class_ops s5m_rtc_ops = { - .read_time = s5m_rtc_read_time, - .set_time = s5m_rtc_set_time, - .read_alarm = s5m_rtc_read_alarm, - .set_alarm = s5m_rtc_set_alarm, - .alarm_irq_enable = s5m_rtc_alarm_irq_enable, -}; - -static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable) -{ - int ret; - ret = regmap_update_bits(info->rtc, SEC_WTSR_SMPL_CNTL, - WTSR_ENABLE_MASK, - enable ? WTSR_ENABLE_MASK : 0); - if (ret < 0) - dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", - __func__, ret); -} - -static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable) -{ - int ret; - ret = regmap_update_bits(info->rtc, SEC_WTSR_SMPL_CNTL, - SMPL_ENABLE_MASK, - enable ? SMPL_ENABLE_MASK : 0); - if (ret < 0) - dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", - __func__, ret); -} - -static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) -{ - u8 data[2]; - unsigned int tp_read; - int ret; - struct rtc_time tm; - - ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &tp_read); - if (ret < 0) { - dev_err(info->dev, "%s: fail to read control reg(%d)\n", - __func__, ret); - return ret; - } - - /* Set RTC control register : Binary mode, 24hour mode */ - data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); - data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); - - info->rtc_24hr_mode = 1; - ret = regmap_raw_write(info->rtc, SEC_ALARM0_CONF, data, 2); - if (ret < 0) { - dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", - __func__, ret); - return ret; - } - - /* In first boot time, Set rtc time to 1/1/2012 00:00:00(SUN) */ - if ((tp_read & RTC_TCON_MASK) == 0) { - dev_dbg(info->dev, "rtc init\n"); - tm.tm_sec = 0; - tm.tm_min = 0; - tm.tm_hour = 0; - tm.tm_wday = 0; - tm.tm_mday = 1; - tm.tm_mon = 0; - tm.tm_year = 112; - tm.tm_yday = 0; - tm.tm_isdst = 0; - ret = s5m_rtc_set_time(info->dev, &tm); - } - - ret = regmap_update_bits(info->rtc, SEC_RTC_UDR_CON, - RTC_TCON_MASK, tp_read | RTC_TCON_MASK); - if (ret < 0) - dev_err(info->dev, "%s: fail to update TCON reg(%d)\n", - __func__, ret); - - return ret; -} - -static int s5m_rtc_probe(struct platform_device *pdev) -{ - struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); - struct sec_platform_data *pdata = s5m87xx->pdata; - struct s5m_rtc_info *info; - int ret; - - if (!pdata) { - dev_err(pdev->dev.parent, "Platform data not supplied\n"); - return -ENODEV; - } - - info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - info->dev = &pdev->dev; - info->s5m87xx = s5m87xx; - info->rtc = s5m87xx->rtc; - info->device_type = s5m87xx->device_type; - info->wtsr_smpl = s5m87xx->wtsr_smpl; - - switch (pdata->device_type) { - case S5M8763X: - info->irq = s5m87xx->irq_base + S5M8763_IRQ_ALARM0; - break; - - case S5M8767X: - info->irq = s5m87xx->irq_base + S5M8767_IRQ_RTCA1; - break; - - default: - ret = -EINVAL; - dev_err(&pdev->dev, "Unsupported device type: %d\n", ret); - return ret; - } - - platform_set_drvdata(pdev, info); - - ret = s5m8767_rtc_init_reg(info); - - if (info->wtsr_smpl) { - s5m_rtc_enable_wtsr(info, true); - s5m_rtc_enable_smpl(info, true); - } - - device_init_wakeup(&pdev->dev, 1); - - info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", - &s5m_rtc_ops, THIS_MODULE); - - if (IS_ERR(info->rtc_dev)) - return PTR_ERR(info->rtc_dev); - - ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, - s5m_rtc_alarm_irq, 0, "rtc-alarm0", - info); - if (ret < 0) - dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", - info->irq, ret); - - return ret; -} - -static void s5m_rtc_shutdown(struct platform_device *pdev) -{ - struct s5m_rtc_info *info = platform_get_drvdata(pdev); - int i; - unsigned int val = 0; - if (info->wtsr_smpl) { - for (i = 0; i < 3; i++) { - s5m_rtc_enable_wtsr(info, false); - regmap_read(info->rtc, SEC_WTSR_SMPL_CNTL, &val); - pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); - if (val & WTSR_ENABLE_MASK) - pr_emerg("%s: fail to disable WTSR\n", - __func__); - else { - pr_info("%s: success to disable WTSR\n", - __func__); - break; - } - } - } - /* Disable SMPL when power off */ - s5m_rtc_enable_smpl(info, false); -} - -static const struct platform_device_id s5m_rtc_id[] = { - { "s5m-rtc", 0 }, -}; - -static struct platform_driver s5m_rtc_driver = { - .driver = { - .name = "s5m-rtc", - .owner = THIS_MODULE, - }, - .probe = s5m_rtc_probe, - .shutdown = s5m_rtc_shutdown, - .id_table = s5m_rtc_id, -}; - -module_platform_driver(s5m_rtc_driver); - -/* Module information */ -MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); -MODULE_DESCRIPTION("Samsung S5M RTC driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:s5m-rtc"); |