Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 1 | /* drivers/rtc/rtc-s3c.c |
| 2 | * |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 3 | * Copyright (c) 2010 Samsung Electronics Co., Ltd. |
| 4 | * http://www.samsung.com/ |
| 5 | * |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 6 | * Copyright (c) 2004,2006 Simtec Electronics |
| 7 | * Ben Dooks, <ben@simtec.co.uk> |
| 8 | * http://armlinux.simtec.co.uk/ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * S3C2410/S3C2440/S3C24XX Internal RTC Driver |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/fs.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/rtc.h> |
| 24 | #include <linux/bcd.h> |
| 25 | #include <linux/clk.h> |
Robert P. J. Day | 9974b6e | 2008-02-06 01:38:42 -0800 | [diff] [blame] | 26 | #include <linux/log2.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Thomas Abraham | 39ce408 | 2011-10-24 14:49:04 +0200 | [diff] [blame] | 28 | #include <linux/of.h> |
Sachin Kamat | dbd9acb | 2012-07-30 14:41:48 -0700 | [diff] [blame] | 29 | #include <linux/uaccess.h> |
| 30 | #include <linux/io.h> |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 31 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 32 | #include <asm/irq.h> |
Arnd Bergmann | b9d7c5d | 2013-03-05 12:04:37 +0100 | [diff] [blame] | 33 | #include "rtc-s3c.h" |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 34 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 35 | struct s3c_rtc { |
| 36 | struct device *dev; |
| 37 | struct rtc_device *rtc; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 38 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 39 | void __iomem *base; |
| 40 | struct clk *rtc_clk; |
| 41 | bool enabled; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 42 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 43 | struct s3c_rtc_data *data; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 44 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 45 | int irq_alarm; |
| 46 | int irq_tick; |
| 47 | |
| 48 | spinlock_t pie_lock; |
| 49 | spinlock_t alarm_clk_lock; |
| 50 | |
| 51 | int ticnt_save, ticnt_en_save; |
| 52 | bool wake_en; |
| 53 | }; |
| 54 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 55 | struct s3c_rtc_data { |
| 56 | int max_user_freq; |
| 57 | |
| 58 | void (*irq_handler) (struct s3c_rtc *info, int mask); |
| 59 | void (*set_freq) (struct s3c_rtc *info, int freq); |
| 60 | void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq); |
| 61 | void (*select_tick_clk) (struct s3c_rtc *info); |
| 62 | void (*save_tick_cnt) (struct s3c_rtc *info); |
| 63 | void (*restore_tick_cnt) (struct s3c_rtc *info); |
| 64 | void (*enable) (struct s3c_rtc *info); |
| 65 | void (*disable) (struct s3c_rtc *info); |
| 66 | }; |
| 67 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 68 | static void s3c_rtc_alarm_clk_enable(struct s3c_rtc *info, bool enable) |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 69 | { |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 70 | unsigned long irq_flags; |
| 71 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 72 | spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 73 | if (enable) { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 74 | if (!info->enabled) { |
| 75 | clk_enable(info->rtc_clk); |
| 76 | info->enabled = true; |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 77 | } |
| 78 | } else { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 79 | if (info->enabled) { |
| 80 | clk_disable(info->rtc_clk); |
| 81 | info->enabled = false; |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 82 | } |
| 83 | } |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 84 | spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 85 | } |
| 86 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 87 | /* IRQ Handlers */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 88 | static irqreturn_t s3c_rtc_tickirq(int irq, void *id) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 89 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 90 | struct s3c_rtc *info = (struct s3c_rtc *)id; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 91 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 92 | if (info->data->irq_handler) |
| 93 | info->data->irq_handler(info, S3C2410_INTP_TIC); |
Atul Dahiya | 2f3478f | 2010-07-20 16:02:51 +0530 | [diff] [blame] | 94 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 95 | return IRQ_HANDLED; |
| 96 | } |
Atul Dahiya | 2f3478f | 2010-07-20 16:02:51 +0530 | [diff] [blame] | 97 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 98 | static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) |
| 99 | { |
| 100 | struct s3c_rtc *info = (struct s3c_rtc *)id; |
| 101 | |
| 102 | if (info->data->irq_handler) |
| 103 | info->data->irq_handler(info, S3C2410_INTP_ALM); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 104 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 105 | return IRQ_HANDLED; |
| 106 | } |
| 107 | |
| 108 | /* Update control registers */ |
Axel Lin | 2ec38a0 | 2011-03-04 17:36:19 -0800 | [diff] [blame] | 109 | static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 110 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 111 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 112 | unsigned int tmp; |
| 113 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 114 | dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 115 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 116 | clk_enable(info->rtc_clk); |
| 117 | tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 118 | |
Axel Lin | 2ec38a0 | 2011-03-04 17:36:19 -0800 | [diff] [blame] | 119 | if (enabled) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 120 | tmp |= S3C2410_RTCALM_ALMEN; |
| 121 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 122 | writeb(tmp, info->base + S3C2410_RTCALM); |
| 123 | clk_disable(info->rtc_clk); |
Axel Lin | 2ec38a0 | 2011-03-04 17:36:19 -0800 | [diff] [blame] | 124 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 125 | s3c_rtc_alarm_clk_enable(info, enabled); |
Donggeun Kim | 88cee8f | 2011-09-14 16:22:19 -0700 | [diff] [blame] | 126 | |
Axel Lin | 2ec38a0 | 2011-03-04 17:36:19 -0800 | [diff] [blame] | 127 | return 0; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 128 | } |
| 129 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 130 | /* Set RTC frequency */ |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 131 | static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 132 | { |
Jonathan Cameron | 5d2a503 | 2009-01-06 14:42:12 -0800 | [diff] [blame] | 133 | if (!is_power_of_2(freq)) |
| 134 | return -EINVAL; |
| 135 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 136 | clk_enable(info->rtc_clk); |
| 137 | spin_lock_irq(&info->pie_lock); |
Ben Dooks | 773be7e | 2008-07-23 21:30:45 -0700 | [diff] [blame] | 138 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 139 | if (info->data->set_freq) |
| 140 | info->data->set_freq(info, freq); |
Maurus Cuelenaere | 9f4123b | 2010-05-24 14:33:43 -0700 | [diff] [blame] | 141 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 142 | spin_unlock_irq(&info->pie_lock); |
| 143 | clk_disable(info->rtc_clk); |
Ben Dooks | 773be7e | 2008-07-23 21:30:45 -0700 | [diff] [blame] | 144 | |
| 145 | return 0; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | /* Time read/write */ |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 149 | static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) |
| 150 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 151 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 152 | unsigned int have_retried = 0; |
| 153 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 154 | clk_enable(info->rtc_clk); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 155 | retry_get_time: |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 156 | rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN); |
| 157 | rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR); |
| 158 | rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE); |
| 159 | rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON); |
| 160 | rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR); |
| 161 | rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 162 | |
Adam Buchbinder | 48fc7f7 | 2012-09-19 21:48:00 -0400 | [diff] [blame] | 163 | /* the only way to work out whether the system was mid-update |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 164 | * when we read it is to check the second counter, and if it |
| 165 | * is zero, then we re-try the entire read |
| 166 | */ |
| 167 | |
| 168 | if (rtc_tm->tm_sec == 0 && !have_retried) { |
| 169 | have_retried = 1; |
| 170 | goto retry_get_time; |
| 171 | } |
| 172 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 173 | rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); |
| 174 | rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); |
| 175 | rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); |
| 176 | rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday); |
| 177 | rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon); |
| 178 | rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 179 | |
| 180 | rtc_tm->tm_year += 100; |
MyungJoo Ham | 4e8896c | 2011-08-25 15:59:22 -0700 | [diff] [blame] | 181 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 182 | dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n", |
MyungJoo Ham | 4e8896c | 2011-08-25 15:59:22 -0700 | [diff] [blame] | 183 | 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, |
| 184 | rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); |
| 185 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 186 | rtc_tm->tm_mon -= 1; |
| 187 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 188 | clk_disable(info->rtc_clk); |
| 189 | |
Kukjin Kim | 5b3ffdd | 2010-10-27 15:33:11 -0700 | [diff] [blame] | 190 | return rtc_valid_tm(rtc_tm); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) |
| 194 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 195 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 641741e | 2006-08-27 01:23:27 -0700 | [diff] [blame] | 196 | int year = tm->tm_year - 100; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 197 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 198 | dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n", |
Kukjin Kim | 30ffc40 | 2010-10-27 15:33:09 -0700 | [diff] [blame] | 199 | 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, |
Ben Dooks | 9a65451 | 2006-08-27 01:23:22 -0700 | [diff] [blame] | 200 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
| 201 | |
Ben Dooks | 641741e | 2006-08-27 01:23:27 -0700 | [diff] [blame] | 202 | /* we get around y2k by simply not supporting it */ |
| 203 | |
| 204 | if (year < 0 || year >= 100) { |
| 205 | dev_err(dev, "rtc only supports 100 years\n"); |
| 206 | return -EINVAL; |
| 207 | } |
| 208 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 209 | clk_enable(info->rtc_clk); |
| 210 | |
| 211 | writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC); |
| 212 | writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN); |
| 213 | writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR); |
| 214 | writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE); |
| 215 | writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON); |
| 216 | writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR); |
| 217 | |
| 218 | clk_disable(info->rtc_clk); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 224 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 225 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 226 | struct rtc_time *alm_tm = &alrm->time; |
| 227 | unsigned int alm_en; |
| 228 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 229 | clk_enable(info->rtc_clk); |
| 230 | alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC); |
| 231 | alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN); |
| 232 | alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR); |
| 233 | alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON); |
| 234 | alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE); |
| 235 | alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 236 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 237 | alm_en = readb(info->base + S3C2410_RTCALM); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 238 | |
David Brownell | a2db8df | 2006-12-13 00:35:08 -0800 | [diff] [blame] | 239 | alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; |
| 240 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 241 | dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n", |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 242 | alm_en, |
Kukjin Kim | 30ffc40 | 2010-10-27 15:33:09 -0700 | [diff] [blame] | 243 | 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday, |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 244 | alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec); |
| 245 | |
| 246 | |
| 247 | /* decode the alarm enable field */ |
| 248 | |
| 249 | if (alm_en & S3C2410_RTCALM_SECEN) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 250 | alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 251 | else |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 252 | alm_tm->tm_sec = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 253 | |
| 254 | if (alm_en & S3C2410_RTCALM_MINEN) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 255 | alm_tm->tm_min = bcd2bin(alm_tm->tm_min); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 256 | else |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 257 | alm_tm->tm_min = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 258 | |
| 259 | if (alm_en & S3C2410_RTCALM_HOUREN) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 260 | alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 261 | else |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 262 | alm_tm->tm_hour = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 263 | |
| 264 | if (alm_en & S3C2410_RTCALM_DAYEN) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 265 | alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 266 | else |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 267 | alm_tm->tm_mday = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 268 | |
| 269 | if (alm_en & S3C2410_RTCALM_MONEN) { |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 270 | alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 271 | alm_tm->tm_mon -= 1; |
| 272 | } else { |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 273 | alm_tm->tm_mon = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | if (alm_en & S3C2410_RTCALM_YEAREN) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 277 | alm_tm->tm_year = bcd2bin(alm_tm->tm_year); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 278 | else |
Changhwan Youn | dd061d1 | 2010-10-27 15:33:08 -0700 | [diff] [blame] | 279 | alm_tm->tm_year = -1; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 280 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 281 | clk_disable(info->rtc_clk); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 286 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 287 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 288 | struct rtc_time *tm = &alrm->time; |
| 289 | unsigned int alrm_en; |
| 290 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 291 | clk_enable(info->rtc_clk); |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 292 | dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 293 | alrm->enabled, |
MyungJoo Ham | 4e8896c | 2011-08-25 15:59:22 -0700 | [diff] [blame] | 294 | 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, |
Kukjin Kim | 30ffc40 | 2010-10-27 15:33:09 -0700 | [diff] [blame] | 295 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 296 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 297 | alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; |
| 298 | writeb(0x00, info->base + S3C2410_RTCALM); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 299 | |
| 300 | if (tm->tm_sec < 60 && tm->tm_sec >= 0) { |
| 301 | alrm_en |= S3C2410_RTCALM_SECEN; |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 302 | writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | if (tm->tm_min < 60 && tm->tm_min >= 0) { |
| 306 | alrm_en |= S3C2410_RTCALM_MINEN; |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 307 | writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | if (tm->tm_hour < 24 && tm->tm_hour >= 0) { |
| 311 | alrm_en |= S3C2410_RTCALM_HOUREN; |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 312 | writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 315 | dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 316 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 317 | writeb(alrm_en, info->base + S3C2410_RTCALM); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 318 | |
Axel Lin | 2ec38a0 | 2011-03-04 17:36:19 -0800 | [diff] [blame] | 319 | s3c_rtc_setaie(dev, alrm->enabled); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 320 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 321 | clk_disable(info->rtc_clk); |
| 322 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 323 | return 0; |
| 324 | } |
| 325 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 326 | static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) |
| 327 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 328 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 329 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 330 | clk_enable(info->rtc_clk); |
Maurus Cuelenaere | 9f4123b | 2010-05-24 14:33:43 -0700 | [diff] [blame] | 331 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 332 | if (info->data->enable_tick) |
| 333 | info->data->enable_tick(info, seq); |
| 334 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 335 | clk_disable(info->rtc_clk); |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 336 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 337 | return 0; |
| 338 | } |
| 339 | |
David Brownell | ff8371a | 2006-09-30 23:28:17 -0700 | [diff] [blame] | 340 | static const struct rtc_class_ops s3c_rtcops = { |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 341 | .read_time = s3c_rtc_gettime, |
| 342 | .set_time = s3c_rtc_settime, |
| 343 | .read_alarm = s3c_rtc_getalarm, |
| 344 | .set_alarm = s3c_rtc_setalarm, |
Changhwan Youn | e6eb524 | 2010-10-27 15:33:09 -0700 | [diff] [blame] | 345 | .proc = s3c_rtc_proc, |
| 346 | .alarm_irq_enable = s3c_rtc_setaie, |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 347 | }; |
| 348 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 349 | static void s3c24xx_rtc_enable(struct s3c_rtc *info) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 350 | { |
Chanwoo Choi | d67288d | 2014-10-13 15:52:31 -0700 | [diff] [blame] | 351 | unsigned int con, tmp; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 352 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 353 | clk_enable(info->rtc_clk); |
Chanwoo Choi | d67288d | 2014-10-13 15:52:31 -0700 | [diff] [blame] | 354 | |
| 355 | con = readw(info->base + S3C2410_RTCCON); |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 356 | /* re-enable the device, and check it is ok */ |
| 357 | if ((con & S3C2410_RTCCON_RTCEN) == 0) { |
| 358 | dev_info(info->dev, "rtc disabled, re-enabling\n"); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 359 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 360 | tmp = readw(info->base + S3C2410_RTCCON); |
| 361 | writew(tmp | S3C2410_RTCCON_RTCEN, |
| 362 | info->base + S3C2410_RTCCON); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 363 | } |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 364 | |
| 365 | if (con & S3C2410_RTCCON_CNTSEL) { |
| 366 | dev_info(info->dev, "removing RTCCON_CNTSEL\n"); |
| 367 | |
| 368 | tmp = readw(info->base + S3C2410_RTCCON); |
| 369 | writew(tmp & ~S3C2410_RTCCON_CNTSEL, |
| 370 | info->base + S3C2410_RTCCON); |
| 371 | } |
| 372 | |
| 373 | if (con & S3C2410_RTCCON_CLKRST) { |
| 374 | dev_info(info->dev, "removing RTCCON_CLKRST\n"); |
| 375 | |
| 376 | tmp = readw(info->base + S3C2410_RTCCON); |
| 377 | writew(tmp & ~S3C2410_RTCCON_CLKRST, |
| 378 | info->base + S3C2410_RTCCON); |
| 379 | } |
| 380 | |
| 381 | clk_disable(info->rtc_clk); |
| 382 | } |
| 383 | |
| 384 | static void s3c24xx_rtc_disable(struct s3c_rtc *info) |
| 385 | { |
| 386 | unsigned int con; |
| 387 | |
| 388 | clk_enable(info->rtc_clk); |
| 389 | |
| 390 | con = readw(info->base + S3C2410_RTCCON); |
| 391 | con &= ~S3C2410_RTCCON_RTCEN; |
| 392 | writew(con, info->base + S3C2410_RTCCON); |
| 393 | |
| 394 | con = readb(info->base + S3C2410_TICNT); |
| 395 | con &= ~S3C2410_TICNT_ENABLE; |
| 396 | writeb(con, info->base + S3C2410_TICNT); |
| 397 | |
| 398 | clk_disable(info->rtc_clk); |
| 399 | } |
| 400 | |
| 401 | static void s3c6410_rtc_disable(struct s3c_rtc *info) |
| 402 | { |
| 403 | unsigned int con; |
| 404 | |
| 405 | clk_enable(info->rtc_clk); |
| 406 | |
| 407 | con = readw(info->base + S3C2410_RTCCON); |
| 408 | con &= ~S3C64XX_RTCCON_TICEN; |
| 409 | con &= ~S3C2410_RTCCON_RTCEN; |
| 410 | writew(con, info->base + S3C2410_RTCCON); |
| 411 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 412 | clk_disable(info->rtc_clk); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 415 | static int s3c_rtc_remove(struct platform_device *pdev) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 416 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 417 | struct s3c_rtc *info = platform_get_drvdata(pdev); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 418 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 419 | s3c_rtc_setaie(info->dev, 0); |
| 420 | |
| 421 | clk_unprepare(info->rtc_clk); |
| 422 | info->rtc_clk = NULL; |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 423 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 424 | return 0; |
| 425 | } |
| 426 | |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 427 | static const struct of_device_id s3c_rtc_dt_match[]; |
| 428 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 429 | static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev) |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 430 | { |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 431 | const struct of_device_id *match; |
Chanwoo Choi | d67288d | 2014-10-13 15:52:31 -0700 | [diff] [blame] | 432 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 433 | match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node); |
| 434 | return (struct s3c_rtc_data *)match->data; |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 435 | } |
| 436 | |
Greg Kroah-Hartman | 5a167f4 | 2012-12-21 13:09:38 -0800 | [diff] [blame] | 437 | static int s3c_rtc_probe(struct platform_device *pdev) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 438 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 439 | struct s3c_rtc *info = NULL; |
Changhwan Youn | e1df962 | 2010-10-27 15:33:10 -0700 | [diff] [blame] | 440 | struct rtc_time rtc_tm; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 441 | struct resource *res; |
| 442 | int ret; |
| 443 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 444 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| 445 | if (!info) |
| 446 | return -ENOMEM; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 447 | |
| 448 | /* find the IRQs */ |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 449 | info->irq_tick = platform_get_irq(pdev, 1); |
| 450 | if (info->irq_tick < 0) { |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 451 | dev_err(&pdev->dev, "no irq for rtc tick\n"); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 452 | return info->irq_tick; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 453 | } |
| 454 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 455 | info->dev = &pdev->dev; |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 456 | info->data = s3c_rtc_get_data(pdev); |
| 457 | if (!info->data) { |
| 458 | dev_err(&pdev->dev, "failed getting s3c_rtc_data\n"); |
| 459 | return -EINVAL; |
| 460 | } |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 461 | spin_lock_init(&info->pie_lock); |
| 462 | spin_lock_init(&info->alarm_clk_lock); |
| 463 | |
| 464 | platform_set_drvdata(pdev, info); |
| 465 | |
| 466 | info->irq_alarm = platform_get_irq(pdev, 0); |
| 467 | if (info->irq_alarm < 0) { |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 468 | dev_err(&pdev->dev, "no irq for alarm\n"); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 469 | return info->irq_alarm; |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 470 | } |
| 471 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 472 | dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n", |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 473 | info->irq_tick, info->irq_alarm); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 474 | |
| 475 | /* get the memory region */ |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 476 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 477 | info->base = devm_ioremap_resource(&pdev->dev, res); |
| 478 | if (IS_ERR(info->base)) |
| 479 | return PTR_ERR(info->base); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 480 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 481 | info->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); |
| 482 | if (IS_ERR(info->rtc_clk)) { |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 483 | dev_err(&pdev->dev, "failed to find rtc clock source\n"); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 484 | return PTR_ERR(info->rtc_clk); |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 485 | } |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 486 | clk_prepare_enable(info->rtc_clk); |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 487 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 488 | /* check to see if everything is setup correctly */ |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 489 | if (info->data->enable) |
| 490 | info->data->enable(info); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 491 | |
Jingoo Han | d4a48c2 | 2013-02-21 16:45:06 -0800 | [diff] [blame] | 492 | dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 493 | readw(info->base + S3C2410_RTCCON)); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 494 | |
Yauhen Kharuzhy | 51b7616 | 2008-10-29 14:01:16 -0700 | [diff] [blame] | 495 | device_init_wakeup(&pdev->dev, 1); |
| 496 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 497 | /* register RTC and exit */ |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 498 | info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 499 | THIS_MODULE); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 500 | if (IS_ERR(info->rtc)) { |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 501 | dev_err(&pdev->dev, "cannot attach rtc\n"); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 502 | ret = PTR_ERR(info->rtc); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 503 | goto err_nortc; |
| 504 | } |
| 505 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 506 | ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq, |
| 507 | 0, "s3c2410-rtc alarm", info); |
| 508 | if (ret) { |
| 509 | dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret); |
| 510 | goto err_nortc; |
| 511 | } |
| 512 | |
| 513 | ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq, |
| 514 | 0, "s3c2410-rtc tick", info); |
| 515 | if (ret) { |
| 516 | dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret); |
| 517 | goto err_nortc; |
| 518 | } |
Maurus Cuelenaere | eaa6e4d | 2010-06-04 14:14:46 -0700 | [diff] [blame] | 519 | |
Taekgyun Ko | 051fe54 | 2010-07-29 13:00:42 +0900 | [diff] [blame] | 520 | /* Check RTC Time */ |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 521 | s3c_rtc_gettime(&pdev->dev, &rtc_tm); |
Taekgyun Ko | 051fe54 | 2010-07-29 13:00:42 +0900 | [diff] [blame] | 522 | |
Changhwan Youn | e1df962 | 2010-10-27 15:33:10 -0700 | [diff] [blame] | 523 | if (rtc_valid_tm(&rtc_tm)) { |
| 524 | rtc_tm.tm_year = 100; |
| 525 | rtc_tm.tm_mon = 0; |
| 526 | rtc_tm.tm_mday = 1; |
| 527 | rtc_tm.tm_hour = 0; |
| 528 | rtc_tm.tm_min = 0; |
| 529 | rtc_tm.tm_sec = 0; |
| 530 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 531 | s3c_rtc_settime(&pdev->dev, &rtc_tm); |
Changhwan Youn | e1df962 | 2010-10-27 15:33:10 -0700 | [diff] [blame] | 532 | |
| 533 | dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); |
Taekgyun Ko | 051fe54 | 2010-07-29 13:00:42 +0900 | [diff] [blame] | 534 | } |
| 535 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 536 | if (info->data->select_tick_clk) |
| 537 | info->data->select_tick_clk(info); |
Heiko Stuebner | 25c1a24 | 2011-12-24 10:52:19 +0900 | [diff] [blame] | 538 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 539 | s3c_rtc_setfreq(info, 1); |
Maurus Cuelenaere | e893de5 | 2010-06-04 14:14:44 -0700 | [diff] [blame] | 540 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 541 | clk_disable(info->rtc_clk); |
Donggeun Kim | cefe4fb | 2011-07-25 17:13:32 -0700 | [diff] [blame] | 542 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 543 | return 0; |
| 544 | |
| 545 | err_nortc: |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 546 | if (info->data->disable) |
| 547 | info->data->disable(info); |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 548 | clk_disable_unprepare(info->rtc_clk); |
Atul Dahiya | e48add8 | 2010-07-20 12:19:14 +0530 | [diff] [blame] | 549 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 550 | return ret; |
| 551 | } |
| 552 | |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 553 | #ifdef CONFIG_PM_SLEEP |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 554 | |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 555 | static int s3c_rtc_suspend(struct device *dev) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 556 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 557 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 558 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 559 | clk_enable(info->rtc_clk); |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 560 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 561 | /* save TICNT for anyone using periodic interrupts */ |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 562 | if (info->data->save_tick_cnt) |
| 563 | info->data->save_tick_cnt(info); |
| 564 | |
| 565 | if (info->data->disable) |
| 566 | info->data->disable(info); |
Vladimir Zapolskiy | f501ed5 | 2010-09-22 13:05:13 -0700 | [diff] [blame] | 567 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 568 | if (device_may_wakeup(dev) && !info->wake_en) { |
| 569 | if (enable_irq_wake(info->irq_alarm) == 0) |
| 570 | info->wake_en = true; |
Ben Dooks | 52cd4e5 | 2011-05-11 15:13:28 -0700 | [diff] [blame] | 571 | else |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 572 | dev_err(dev, "enable_irq_wake failed\n"); |
Ben Dooks | 52cd4e5 | 2011-05-11 15:13:28 -0700 | [diff] [blame] | 573 | } |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 574 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 575 | clk_disable(info->rtc_clk); |
Vladimir Zapolskiy | f501ed5 | 2010-09-22 13:05:13 -0700 | [diff] [blame] | 576 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 577 | return 0; |
| 578 | } |
| 579 | |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 580 | static int s3c_rtc_resume(struct device *dev) |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 581 | { |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 582 | struct s3c_rtc *info = dev_get_drvdata(dev); |
Maurus Cuelenaere | 9f4123b | 2010-05-24 14:33:43 -0700 | [diff] [blame] | 583 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 584 | clk_enable(info->rtc_clk); |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 585 | |
| 586 | if (info->data->enable) |
| 587 | info->data->enable(info); |
| 588 | |
| 589 | if (info->data->restore_tick_cnt) |
| 590 | info->data->restore_tick_cnt(info); |
Vladimir Zapolskiy | f501ed5 | 2010-09-22 13:05:13 -0700 | [diff] [blame] | 591 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 592 | if (device_may_wakeup(dev) && info->wake_en) { |
| 593 | disable_irq_wake(info->irq_alarm); |
| 594 | info->wake_en = false; |
Ben Dooks | 52cd4e5 | 2011-05-11 15:13:28 -0700 | [diff] [blame] | 595 | } |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 596 | |
Chanwoo Choi | 19be09f | 2014-10-13 15:52:28 -0700 | [diff] [blame] | 597 | clk_disable(info->rtc_clk); |
Vladimir Zapolskiy | f501ed5 | 2010-09-22 13:05:13 -0700 | [diff] [blame] | 598 | |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 599 | return 0; |
| 600 | } |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 601 | #endif |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 602 | static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume); |
| 603 | |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 604 | static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask) |
| 605 | { |
| 606 | clk_enable(info->rtc_clk); |
| 607 | rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); |
| 608 | clk_disable(info->rtc_clk); |
| 609 | |
| 610 | s3c_rtc_alarm_clk_enable(info, false); |
| 611 | } |
| 612 | |
| 613 | static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask) |
| 614 | { |
| 615 | clk_enable(info->rtc_clk); |
| 616 | rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); |
| 617 | writeb(mask, info->base + S3C2410_INTP); |
| 618 | clk_disable(info->rtc_clk); |
| 619 | |
| 620 | s3c_rtc_alarm_clk_enable(info, false); |
| 621 | } |
| 622 | |
| 623 | static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq) |
| 624 | { |
| 625 | unsigned int tmp = 0; |
| 626 | int val; |
| 627 | |
| 628 | tmp = readb(info->base + S3C2410_TICNT); |
| 629 | tmp &= S3C2410_TICNT_ENABLE; |
| 630 | |
| 631 | val = (info->rtc->max_user_freq / freq) - 1; |
| 632 | tmp |= val; |
| 633 | |
| 634 | writel(tmp, info->base + S3C2410_TICNT); |
| 635 | } |
| 636 | |
| 637 | static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq) |
| 638 | { |
| 639 | unsigned int tmp = 0; |
| 640 | int val; |
| 641 | |
| 642 | tmp = readb(info->base + S3C2410_TICNT); |
| 643 | tmp &= S3C2410_TICNT_ENABLE; |
| 644 | |
| 645 | val = (info->rtc->max_user_freq / freq) - 1; |
| 646 | |
| 647 | tmp |= S3C2443_TICNT_PART(val); |
| 648 | writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); |
| 649 | |
| 650 | writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2); |
| 651 | |
| 652 | writel(tmp, info->base + S3C2410_TICNT); |
| 653 | } |
| 654 | |
| 655 | static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq) |
| 656 | { |
| 657 | unsigned int tmp = 0; |
| 658 | int val; |
| 659 | |
| 660 | tmp = readb(info->base + S3C2410_TICNT); |
| 661 | tmp &= S3C2410_TICNT_ENABLE; |
| 662 | |
| 663 | val = (info->rtc->max_user_freq / freq) - 1; |
| 664 | |
| 665 | tmp |= S3C2443_TICNT_PART(val); |
| 666 | writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); |
| 667 | |
| 668 | writel(tmp, info->base + S3C2410_TICNT); |
| 669 | } |
| 670 | |
| 671 | static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq) |
| 672 | { |
| 673 | int val; |
| 674 | |
| 675 | val = (info->rtc->max_user_freq / freq) - 1; |
| 676 | writel(val, info->base + S3C2410_TICNT); |
| 677 | } |
| 678 | |
| 679 | static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq) |
| 680 | { |
| 681 | unsigned int ticnt; |
| 682 | |
| 683 | ticnt = readb(info->base + S3C2410_TICNT); |
| 684 | ticnt &= S3C2410_TICNT_ENABLE; |
| 685 | |
| 686 | seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); |
| 687 | } |
| 688 | |
| 689 | static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info) |
| 690 | { |
| 691 | unsigned int con; |
| 692 | |
| 693 | con = readw(info->base + S3C2410_RTCCON); |
| 694 | con |= S3C2443_RTCCON_TICSEL; |
| 695 | writew(con, info->base + S3C2410_RTCCON); |
| 696 | } |
| 697 | |
| 698 | static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq) |
| 699 | { |
| 700 | unsigned int ticnt; |
| 701 | |
| 702 | ticnt = readw(info->base + S3C2410_RTCCON); |
| 703 | ticnt &= S3C64XX_RTCCON_TICEN; |
| 704 | |
| 705 | seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); |
| 706 | } |
| 707 | |
| 708 | static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info) |
| 709 | { |
| 710 | info->ticnt_save = readb(info->base + S3C2410_TICNT); |
| 711 | } |
| 712 | |
| 713 | static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info) |
| 714 | { |
| 715 | writeb(info->ticnt_save, info->base + S3C2410_TICNT); |
| 716 | } |
| 717 | |
| 718 | static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info) |
| 719 | { |
| 720 | info->ticnt_en_save = readw(info->base + S3C2410_RTCCON); |
| 721 | info->ticnt_en_save &= S3C64XX_RTCCON_TICEN; |
| 722 | info->ticnt_save = readl(info->base + S3C2410_TICNT); |
| 723 | } |
| 724 | |
| 725 | static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info) |
| 726 | { |
| 727 | unsigned int con; |
| 728 | |
| 729 | writel(info->ticnt_save, info->base + S3C2410_TICNT); |
| 730 | if (info->ticnt_en_save) { |
| 731 | con = readw(info->base + S3C2410_RTCCON); |
| 732 | writew(con | info->ticnt_en_save, |
| 733 | info->base + S3C2410_RTCCON); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | static struct s3c_rtc_data const s3c2410_rtc_data = { |
| 738 | .max_user_freq = 128, |
| 739 | .irq_handler = s3c24xx_rtc_irq, |
| 740 | .set_freq = s3c2410_rtc_setfreq, |
| 741 | .enable_tick = s3c24xx_rtc_enable_tick, |
| 742 | .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, |
| 743 | .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, |
| 744 | .enable = s3c24xx_rtc_enable, |
| 745 | .disable = s3c24xx_rtc_disable, |
| 746 | }; |
| 747 | |
| 748 | static struct s3c_rtc_data const s3c2416_rtc_data = { |
| 749 | .max_user_freq = 32768, |
| 750 | .irq_handler = s3c24xx_rtc_irq, |
| 751 | .set_freq = s3c2416_rtc_setfreq, |
| 752 | .enable_tick = s3c24xx_rtc_enable_tick, |
| 753 | .select_tick_clk = s3c2416_rtc_select_tick_clk, |
| 754 | .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, |
| 755 | .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, |
| 756 | .enable = s3c24xx_rtc_enable, |
| 757 | .disable = s3c24xx_rtc_disable, |
| 758 | }; |
| 759 | |
| 760 | static struct s3c_rtc_data const s3c2443_rtc_data = { |
| 761 | .max_user_freq = 32768, |
| 762 | .irq_handler = s3c24xx_rtc_irq, |
| 763 | .set_freq = s3c2443_rtc_setfreq, |
| 764 | .enable_tick = s3c24xx_rtc_enable_tick, |
| 765 | .select_tick_clk = s3c2416_rtc_select_tick_clk, |
| 766 | .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, |
| 767 | .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, |
| 768 | .enable = s3c24xx_rtc_enable, |
| 769 | .disable = s3c24xx_rtc_disable, |
| 770 | }; |
| 771 | |
| 772 | static struct s3c_rtc_data const s3c6410_rtc_data = { |
| 773 | .max_user_freq = 32768, |
| 774 | .irq_handler = s3c6410_rtc_irq, |
| 775 | .set_freq = s3c6410_rtc_setfreq, |
| 776 | .enable_tick = s3c6410_rtc_enable_tick, |
| 777 | .save_tick_cnt = s3c6410_rtc_save_tick_cnt, |
| 778 | .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt, |
| 779 | .enable = s3c24xx_rtc_enable, |
| 780 | .disable = s3c6410_rtc_disable, |
Tushar Behera | c3cba92 | 2012-04-12 12:49:14 -0700 | [diff] [blame] | 781 | }; |
| 782 | |
Thomas Abraham | 39ce408 | 2011-10-24 14:49:04 +0200 | [diff] [blame] | 783 | static const struct of_device_id s3c_rtc_dt_match[] = { |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 784 | { |
Tushar Behera | cd1e6f9 | 2012-04-12 12:49:14 -0700 | [diff] [blame] | 785 | .compatible = "samsung,s3c2410-rtc", |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 786 | .data = (void *)&s3c2410_rtc_data, |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 787 | }, { |
Tushar Behera | cd1e6f9 | 2012-04-12 12:49:14 -0700 | [diff] [blame] | 788 | .compatible = "samsung,s3c2416-rtc", |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 789 | .data = (void *)&s3c2416_rtc_data, |
Heiko Stuebner | 25c1a24 | 2011-12-24 10:52:19 +0900 | [diff] [blame] | 790 | }, { |
Tushar Behera | cd1e6f9 | 2012-04-12 12:49:14 -0700 | [diff] [blame] | 791 | .compatible = "samsung,s3c2443-rtc", |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 792 | .data = (void *)&s3c2443_rtc_data, |
Heiko Stuebner | 25c1a24 | 2011-12-24 10:52:19 +0900 | [diff] [blame] | 793 | }, { |
Tushar Behera | cd1e6f9 | 2012-04-12 12:49:14 -0700 | [diff] [blame] | 794 | .compatible = "samsung,s3c6410-rtc", |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 795 | .data = (void *)&s3c6410_rtc_data, |
Heiko Stuebner | d2524ca | 2011-12-24 10:52:14 +0900 | [diff] [blame] | 796 | }, |
Chanwoo Choi | ae05c95 | 2014-10-13 15:52:33 -0700 | [diff] [blame^] | 797 | { /* sentinel */ }, |
Thomas Abraham | 39ce408 | 2011-10-24 14:49:04 +0200 | [diff] [blame] | 798 | }; |
| 799 | MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match); |
Maurus Cuelenaere | 9f4123b | 2010-05-24 14:33:43 -0700 | [diff] [blame] | 800 | |
| 801 | static struct platform_driver s3c_rtc_driver = { |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 802 | .probe = s3c_rtc_probe, |
Greg Kroah-Hartman | 5a167f4 | 2012-12-21 13:09:38 -0800 | [diff] [blame] | 803 | .remove = s3c_rtc_remove, |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 804 | .driver = { |
Maurus Cuelenaere | 9f4123b | 2010-05-24 14:33:43 -0700 | [diff] [blame] | 805 | .name = "s3c-rtc", |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 806 | .owner = THIS_MODULE, |
Jingoo Han | 32e445a | 2013-04-29 16:19:27 -0700 | [diff] [blame] | 807 | .pm = &s3c_rtc_pm_ops, |
Sachin Kamat | 04a373f | 2012-12-17 16:02:52 -0800 | [diff] [blame] | 808 | .of_match_table = of_match_ptr(s3c_rtc_dt_match), |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 809 | }, |
| 810 | }; |
Axel Lin | 0c4eae6 | 2012-01-10 15:10:48 -0800 | [diff] [blame] | 811 | module_platform_driver(s3c_rtc_driver); |
Ben Dooks | 1add678 | 2006-07-01 04:36:26 -0700 | [diff] [blame] | 812 | |
| 813 | MODULE_DESCRIPTION("Samsung S3C RTC Driver"); |
| 814 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); |
| 815 | MODULE_LICENSE("GPL"); |
Kay Sievers | ad28a07 | 2008-04-10 21:29:25 -0700 | [diff] [blame] | 816 | MODULE_ALIAS("platform:s3c2410-rtc"); |