--- zzzz-none-000/linux-3.10.107/drivers/rtc/rtc-s3c.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/rtc/rtc-s3c.c 2021-02-04 17:41:59.000000000 +0000 @@ -32,155 +32,150 @@ #include #include "rtc-s3c.h" -enum s3c_cpu_type { - TYPE_S3C2410, - TYPE_S3C2416, - TYPE_S3C2443, - TYPE_S3C64XX, -}; +struct s3c_rtc { + struct device *dev; + struct rtc_device *rtc; -struct s3c_rtc_drv_data { - int cpu_type; -}; + void __iomem *base; + struct clk *rtc_clk; + struct clk *rtc_src_clk; + bool clk_disabled; + + struct s3c_rtc_data *data; -/* I have yet to find an S3C implementation with more than one - * of these rtc blocks in */ + int irq_alarm; + int irq_tick; -static struct clk *rtc_clk; -static void __iomem *s3c_rtc_base; -static int s3c_rtc_alarmno = NO_IRQ; -static int s3c_rtc_tickno = NO_IRQ; -static enum s3c_cpu_type s3c_rtc_cpu_type; + spinlock_t pie_lock; + spinlock_t alarm_clk_lock; -static DEFINE_SPINLOCK(s3c_rtc_pie_lock); + int ticnt_save, ticnt_en_save; + bool wake_en; +}; + +struct s3c_rtc_data { + int max_user_freq; + bool needs_src_clk; + + void (*irq_handler) (struct s3c_rtc *info, int mask); + void (*set_freq) (struct s3c_rtc *info, int freq); + void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq); + void (*select_tick_clk) (struct s3c_rtc *info); + void (*save_tick_cnt) (struct s3c_rtc *info); + void (*restore_tick_cnt) (struct s3c_rtc *info); + void (*enable) (struct s3c_rtc *info); + void (*disable) (struct s3c_rtc *info); +}; -static void s3c_rtc_alarm_clk_enable(bool enable) +static void s3c_rtc_enable_clk(struct s3c_rtc *info) { - static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock); - static bool alarm_clk_enabled; unsigned long irq_flags; - spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags); - if (enable) { - if (!alarm_clk_enabled) { - clk_enable(rtc_clk); - alarm_clk_enabled = true; - } - } else { - if (alarm_clk_enabled) { - clk_disable(rtc_clk); - alarm_clk_enabled = false; - } + spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); + if (info->clk_disabled) { + clk_enable(info->rtc_clk); + if (info->data->needs_src_clk) + clk_enable(info->rtc_src_clk); + info->clk_disabled = false; } - spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags); + spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); } -/* IRQ Handlers */ - -static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) +static void s3c_rtc_disable_clk(struct s3c_rtc *info) { - struct rtc_device *rdev = id; - - clk_enable(rtc_clk); - rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); + unsigned long irq_flags; - if (s3c_rtc_cpu_type == TYPE_S3C64XX) - writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); + spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); + if (!info->clk_disabled) { + if (info->data->needs_src_clk) + clk_disable(info->rtc_src_clk); + clk_disable(info->rtc_clk); + info->clk_disabled = true; + } + spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); +} - clk_disable(rtc_clk); +/* IRQ Handlers */ +static irqreturn_t s3c_rtc_tickirq(int irq, void *id) +{ + struct s3c_rtc *info = (struct s3c_rtc *)id; - s3c_rtc_alarm_clk_enable(false); + if (info->data->irq_handler) + info->data->irq_handler(info, S3C2410_INTP_TIC); return IRQ_HANDLED; } -static irqreturn_t s3c_rtc_tickirq(int irq, void *id) +static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) { - struct rtc_device *rdev = id; - - clk_enable(rtc_clk); - rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); + struct s3c_rtc *info = (struct s3c_rtc *)id; - if (s3c_rtc_cpu_type == TYPE_S3C64XX) - writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP); + if (info->data->irq_handler) + info->data->irq_handler(info, S3C2410_INTP_ALM); - clk_disable(rtc_clk); return IRQ_HANDLED; } /* Update control registers */ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) { + struct s3c_rtc *info = dev_get_drvdata(dev); unsigned int tmp; - dev_dbg(dev, "%s: aie=%d\n", __func__, enabled); + dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled); + + s3c_rtc_enable_clk(info); - clk_enable(rtc_clk); - tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; + tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; if (enabled) tmp |= S3C2410_RTCALM_ALMEN; - writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); - clk_disable(rtc_clk); + writeb(tmp, info->base + S3C2410_RTCALM); - s3c_rtc_alarm_clk_enable(enabled); + s3c_rtc_disable_clk(info); + + if (enabled) + s3c_rtc_enable_clk(info); + else + s3c_rtc_disable_clk(info); return 0; } -static int s3c_rtc_setfreq(struct device *dev, int freq) +/* Set RTC frequency */ +static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc_dev = platform_get_drvdata(pdev); - unsigned int tmp = 0; - int val; - if (!is_power_of_2(freq)) return -EINVAL; - clk_enable(rtc_clk); - spin_lock_irq(&s3c_rtc_pie_lock); + s3c_rtc_enable_clk(info); + spin_lock_irq(&info->pie_lock); - if (s3c_rtc_cpu_type != TYPE_S3C64XX) { - tmp = readb(s3c_rtc_base + S3C2410_TICNT); - tmp &= S3C2410_TICNT_ENABLE; - } + if (info->data->set_freq) + info->data->set_freq(info, freq); - val = (rtc_dev->max_user_freq / freq) - 1; - - if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { - tmp |= S3C2443_TICNT_PART(val); - writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1); - - if (s3c_rtc_cpu_type == TYPE_S3C2416) - writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2); - } else { - tmp |= val; - } - - writel(tmp, s3c_rtc_base + S3C2410_TICNT); - spin_unlock_irq(&s3c_rtc_pie_lock); - clk_disable(rtc_clk); + spin_unlock_irq(&info->pie_lock); + s3c_rtc_disable_clk(info); return 0; } /* Time read/write */ - static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) { + struct s3c_rtc *info = dev_get_drvdata(dev); unsigned int have_retried = 0; - void __iomem *base = s3c_rtc_base; - clk_enable(rtc_clk); + s3c_rtc_enable_clk(info); + retry_get_time: - rtc_tm->tm_min = readb(base + S3C2410_RTCMIN); - rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR); - rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE); - rtc_tm->tm_mon = readb(base + S3C2410_RTCMON); - rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR); - rtc_tm->tm_sec = readb(base + S3C2410_RTCSEC); + rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN); + rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR); + rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE); + rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON); + rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR); + rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC); /* the only way to work out whether the system was mid-update * when we read it is to check the second counter, and if it @@ -199,6 +194,8 @@ rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon); rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); + s3c_rtc_disable_clk(info); + rtc_tm->tm_year += 100; dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n", @@ -207,13 +204,12 @@ rtc_tm->tm_mon -= 1; - clk_disable(rtc_clk); return rtc_valid_tm(rtc_tm); } static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) { - void __iomem *base = s3c_rtc_base; + struct s3c_rtc *info = dev_get_drvdata(dev); int year = tm->tm_year - 100; dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n", @@ -227,33 +223,38 @@ return -EINVAL; } - clk_enable(rtc_clk); - writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC); - writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN); - writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR); - writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE); - writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON); - writeb(bin2bcd(year), base + S3C2410_RTCYEAR); - clk_disable(rtc_clk); + s3c_rtc_enable_clk(info); + + writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC); + writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN); + writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR); + writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE); + writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON); + writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR); + + s3c_rtc_disable_clk(info); return 0; } static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) { + struct s3c_rtc *info = dev_get_drvdata(dev); struct rtc_time *alm_tm = &alrm->time; - void __iomem *base = s3c_rtc_base; unsigned int alm_en; - clk_enable(rtc_clk); - alm_tm->tm_sec = readb(base + S3C2410_ALMSEC); - alm_tm->tm_min = readb(base + S3C2410_ALMMIN); - alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR); - alm_tm->tm_mon = readb(base + S3C2410_ALMMON); - alm_tm->tm_mday = readb(base + S3C2410_ALMDATE); - alm_tm->tm_year = readb(base + S3C2410_ALMYEAR); + s3c_rtc_enable_clk(info); + + alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC); + alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN); + alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR); + alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON); + alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE); + alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR); - alm_en = readb(base + S3C2410_RTCALM); + alm_en = readb(info->base + S3C2410_RTCALM); + + s3c_rtc_disable_clk(info); alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; @@ -262,9 +263,7 @@ 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday, alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec); - /* decode the alarm enable field */ - if (alm_en & S3C2410_RTCALM_SECEN) alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec); else @@ -297,65 +296,78 @@ else alm_tm->tm_year = -1; - clk_disable(rtc_clk); return 0; } static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) { + struct s3c_rtc *info = dev_get_drvdata(dev); struct rtc_time *tm = &alrm->time; - void __iomem *base = s3c_rtc_base; unsigned int alrm_en; + int year = tm->tm_year - 100; - clk_enable(rtc_clk); dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", alrm->enabled, 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); - alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; - writeb(0x00, base + S3C2410_RTCALM); + s3c_rtc_enable_clk(info); + + alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; + writeb(0x00, info->base + S3C2410_RTCALM); if (tm->tm_sec < 60 && tm->tm_sec >= 0) { alrm_en |= S3C2410_RTCALM_SECEN; - writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC); + writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC); } if (tm->tm_min < 60 && tm->tm_min >= 0) { alrm_en |= S3C2410_RTCALM_MINEN; - writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN); + writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN); } if (tm->tm_hour < 24 && tm->tm_hour >= 0) { alrm_en |= S3C2410_RTCALM_HOUREN; - writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR); + writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR); + } + + if (year < 100 && year >= 0) { + alrm_en |= S3C2410_RTCALM_YEAREN; + writeb(bin2bcd(year), info->base + S3C2410_ALMYEAR); + } + + if (tm->tm_mon < 12 && tm->tm_mon >= 0) { + alrm_en |= S3C2410_RTCALM_MONEN; + writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON); + } + + if (tm->tm_mday <= 31 && tm->tm_mday >= 1) { + alrm_en |= S3C2410_RTCALM_DAYEN; + writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE); } dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en); - writeb(alrm_en, base + S3C2410_RTCALM); + writeb(alrm_en, info->base + S3C2410_RTCALM); + + s3c_rtc_disable_clk(info); s3c_rtc_setaie(dev, alrm->enabled); - clk_disable(rtc_clk); return 0; } static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) { - unsigned int ticnt; + struct s3c_rtc *info = dev_get_drvdata(dev); - clk_enable(rtc_clk); - if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); - ticnt &= S3C64XX_RTCCON_TICEN; - } else { - ticnt = readb(s3c_rtc_base + S3C2410_TICNT); - ticnt &= S3C2410_TICNT_ENABLE; - } + s3c_rtc_enable_clk(info); + + if (info->data->enable_tick) + info->data->enable_tick(info, seq); + + s3c_rtc_disable_clk(info); - seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); - clk_disable(rtc_clk); return 0; } @@ -368,156 +380,156 @@ .alarm_irq_enable = s3c_rtc_setaie, }; -static void s3c_rtc_enable(struct platform_device *pdev, int en) +static void s3c24xx_rtc_enable(struct s3c_rtc *info) { - void __iomem *base = s3c_rtc_base; - unsigned int tmp; + unsigned int con, tmp; - if (s3c_rtc_base == NULL) - return; + con = readw(info->base + S3C2410_RTCCON); + /* re-enable the device, and check it is ok */ + if ((con & S3C2410_RTCCON_RTCEN) == 0) { + dev_info(info->dev, "rtc disabled, re-enabling\n"); - clk_enable(rtc_clk); - if (!en) { - tmp = readw(base + S3C2410_RTCCON); - if (s3c_rtc_cpu_type == TYPE_S3C64XX) - tmp &= ~S3C64XX_RTCCON_TICEN; - tmp &= ~S3C2410_RTCCON_RTCEN; - writew(tmp, base + S3C2410_RTCCON); - - if (s3c_rtc_cpu_type != TYPE_S3C64XX) { - tmp = readb(base + S3C2410_TICNT); - tmp &= ~S3C2410_TICNT_ENABLE; - writeb(tmp, base + S3C2410_TICNT); - } - } else { - /* re-enable the device, and check it is ok */ + tmp = readw(info->base + S3C2410_RTCCON); + writew(tmp | S3C2410_RTCCON_RTCEN, + info->base + S3C2410_RTCCON); + } - if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) { - dev_info(&pdev->dev, "rtc disabled, re-enabling\n"); + if (con & S3C2410_RTCCON_CNTSEL) { + dev_info(info->dev, "removing RTCCON_CNTSEL\n"); - tmp = readw(base + S3C2410_RTCCON); - writew(tmp | S3C2410_RTCCON_RTCEN, - base + S3C2410_RTCCON); - } + tmp = readw(info->base + S3C2410_RTCCON); + writew(tmp & ~S3C2410_RTCCON_CNTSEL, + info->base + S3C2410_RTCCON); + } - if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) { - dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n"); + if (con & S3C2410_RTCCON_CLKRST) { + dev_info(info->dev, "removing RTCCON_CLKRST\n"); - tmp = readw(base + S3C2410_RTCCON); - writew(tmp & ~S3C2410_RTCCON_CNTSEL, - base + S3C2410_RTCCON); - } + tmp = readw(info->base + S3C2410_RTCCON); + writew(tmp & ~S3C2410_RTCCON_CLKRST, + info->base + S3C2410_RTCCON); + } +} - if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) { - dev_info(&pdev->dev, "removing RTCCON_CLKRST\n"); +static void s3c24xx_rtc_disable(struct s3c_rtc *info) +{ + unsigned int con; - tmp = readw(base + S3C2410_RTCCON); - writew(tmp & ~S3C2410_RTCCON_CLKRST, - base + S3C2410_RTCCON); - } - } - clk_disable(rtc_clk); + con = readw(info->base + S3C2410_RTCCON); + con &= ~S3C2410_RTCCON_RTCEN; + writew(con, info->base + S3C2410_RTCCON); + + con = readb(info->base + S3C2410_TICNT); + con &= ~S3C2410_TICNT_ENABLE; + writeb(con, info->base + S3C2410_TICNT); } -static int s3c_rtc_remove(struct platform_device *dev) +static void s3c6410_rtc_disable(struct s3c_rtc *info) { - platform_set_drvdata(dev, NULL); + unsigned int con; - s3c_rtc_setaie(&dev->dev, 0); + con = readw(info->base + S3C2410_RTCCON); + con &= ~S3C64XX_RTCCON_TICEN; + con &= ~S3C2410_RTCCON_RTCEN; + writew(con, info->base + S3C2410_RTCCON); +} - clk_unprepare(rtc_clk); - rtc_clk = NULL; +static int s3c_rtc_remove(struct platform_device *pdev) +{ + struct s3c_rtc *info = platform_get_drvdata(pdev); + + s3c_rtc_setaie(info->dev, 0); + + if (info->data->needs_src_clk) + clk_unprepare(info->rtc_src_clk); + clk_unprepare(info->rtc_clk); return 0; } static const struct of_device_id s3c_rtc_dt_match[]; -static inline int s3c_rtc_get_driver_data(struct platform_device *pdev) +static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev) { -#ifdef CONFIG_OF - struct s3c_rtc_drv_data *data; - if (pdev->dev.of_node) { - const struct of_device_id *match; - match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node); - data = (struct s3c_rtc_drv_data *) match->data; - return data->cpu_type; - } -#endif - return platform_get_device_id(pdev)->driver_data; + const struct of_device_id *match; + + match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node); + return (struct s3c_rtc_data *)match->data; } static int s3c_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc; + struct s3c_rtc *info = NULL; struct rtc_time rtc_tm; struct resource *res; int ret; - int tmp; - dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev); + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; /* find the IRQs */ - - s3c_rtc_tickno = platform_get_irq(pdev, 1); - if (s3c_rtc_tickno < 0) { + info->irq_tick = platform_get_irq(pdev, 1); + if (info->irq_tick < 0) { dev_err(&pdev->dev, "no irq for rtc tick\n"); - return s3c_rtc_tickno; + return info->irq_tick; } - s3c_rtc_alarmno = platform_get_irq(pdev, 0); - if (s3c_rtc_alarmno < 0) { + info->dev = &pdev->dev; + info->data = s3c_rtc_get_data(pdev); + if (!info->data) { + dev_err(&pdev->dev, "failed getting s3c_rtc_data\n"); + return -EINVAL; + } + spin_lock_init(&info->pie_lock); + spin_lock_init(&info->alarm_clk_lock); + + platform_set_drvdata(pdev, info); + + info->irq_alarm = platform_get_irq(pdev, 0); + if (info->irq_alarm < 0) { dev_err(&pdev->dev, "no irq for alarm\n"); - return s3c_rtc_alarmno; + return info->irq_alarm; } dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n", - s3c_rtc_tickno, s3c_rtc_alarmno); + info->irq_tick, info->irq_alarm); /* get the memory region */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(s3c_rtc_base)) - return PTR_ERR(s3c_rtc_base); - - rtc_clk = devm_clk_get(&pdev->dev, "rtc"); - if (IS_ERR(rtc_clk)) { - dev_err(&pdev->dev, "failed to find rtc clock source\n"); - ret = PTR_ERR(rtc_clk); - rtc_clk = NULL; - return ret; + info->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(info->base)) + return PTR_ERR(info->base); + + info->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); + if (IS_ERR(info->rtc_clk)) { + dev_err(&pdev->dev, "failed to find rtc clock\n"); + return PTR_ERR(info->rtc_clk); + } + clk_prepare_enable(info->rtc_clk); + + if (info->data->needs_src_clk) { + info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src"); + if (IS_ERR(info->rtc_src_clk)) { + dev_err(&pdev->dev, + "failed to find rtc source clock\n"); + clk_disable_unprepare(info->rtc_clk); + return PTR_ERR(info->rtc_src_clk); + } + clk_prepare_enable(info->rtc_src_clk); } - clk_prepare_enable(rtc_clk); - /* check to see if everything is setup correctly */ - - s3c_rtc_enable(pdev, 1); + if (info->data->enable) + info->data->enable(info); dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", - readw(s3c_rtc_base + S3C2410_RTCCON)); + readw(info->base + S3C2410_RTCCON)); device_init_wakeup(&pdev->dev, 1); - /* register RTC and exit */ - - rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, - THIS_MODULE); - - if (IS_ERR(rtc)) { - dev_err(&pdev->dev, "cannot attach rtc\n"); - ret = PTR_ERR(rtc); - goto err_nortc; - } - - s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev); - /* Check RTC Time */ - - s3c_rtc_gettime(NULL, &rtc_tm); - - if (rtc_valid_tm(&rtc_tm)) { + if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) { rtc_tm.tm_year = 100; rtc_tm.tm_mon = 0; rtc_tm.tm_mday = 1; @@ -525,167 +537,303 @@ rtc_tm.tm_min = 0; rtc_tm.tm_sec = 0; - s3c_rtc_settime(NULL, &rtc_tm); + s3c_rtc_settime(&pdev->dev, &rtc_tm); dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); } - if (s3c_rtc_cpu_type != TYPE_S3C2410) - rtc->max_user_freq = 32768; - else - rtc->max_user_freq = 128; - - if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) { - tmp = readw(s3c_rtc_base + S3C2410_RTCCON); - tmp |= S3C2443_RTCCON_TICSEL; - writew(tmp, s3c_rtc_base + S3C2410_RTCCON); + /* register RTC and exit */ + info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, + THIS_MODULE); + if (IS_ERR(info->rtc)) { + dev_err(&pdev->dev, "cannot attach rtc\n"); + ret = PTR_ERR(info->rtc); + goto err_nortc; } - platform_set_drvdata(pdev, rtc); - - s3c_rtc_setfreq(&pdev->dev, 1); - - ret = devm_request_irq(&pdev->dev, s3c_rtc_alarmno, s3c_rtc_alarmirq, - 0, "s3c2410-rtc alarm", rtc); + ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq, + 0, "s3c2410-rtc alarm", info); if (ret) { - dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); - goto err_alarm_irq; + dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret); + goto err_nortc; } - ret = devm_request_irq(&pdev->dev, s3c_rtc_tickno, s3c_rtc_tickirq, - 0, "s3c2410-rtc tick", rtc); + ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq, + 0, "s3c2410-rtc tick", info); if (ret) { - dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); - goto err_alarm_irq; + dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret); + goto err_nortc; } - clk_disable(rtc_clk); + if (info->data->select_tick_clk) + info->data->select_tick_clk(info); - return 0; + s3c_rtc_setfreq(info, 1); + + s3c_rtc_disable_clk(info); - err_alarm_irq: - platform_set_drvdata(pdev, NULL); + return 0; err_nortc: - s3c_rtc_enable(pdev, 0); - clk_disable_unprepare(rtc_clk); + if (info->data->disable) + info->data->disable(info); + + if (info->data->needs_src_clk) + clk_disable_unprepare(info->rtc_src_clk); + clk_disable_unprepare(info->rtc_clk); return ret; } #ifdef CONFIG_PM_SLEEP -/* RTC Power management control */ - -static int ticnt_save, ticnt_en_save; -static bool wake_en; static int s3c_rtc_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); + struct s3c_rtc *info = dev_get_drvdata(dev); + + s3c_rtc_enable_clk(info); - clk_enable(rtc_clk); /* save TICNT for anyone using periodic interrupts */ - ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); - if (s3c_rtc_cpu_type == TYPE_S3C64XX) { - ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON); - ticnt_en_save &= S3C64XX_RTCCON_TICEN; - } - s3c_rtc_enable(pdev, 0); - - if (device_may_wakeup(dev) && !wake_en) { - if (enable_irq_wake(s3c_rtc_alarmno) == 0) - wake_en = true; + if (info->data->save_tick_cnt) + info->data->save_tick_cnt(info); + + if (info->data->disable) + info->data->disable(info); + + if (device_may_wakeup(dev) && !info->wake_en) { + if (enable_irq_wake(info->irq_alarm) == 0) + info->wake_en = true; else dev_err(dev, "enable_irq_wake failed\n"); } - clk_disable(rtc_clk); return 0; } static int s3c_rtc_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - unsigned int tmp; + struct s3c_rtc *info = dev_get_drvdata(dev); - clk_enable(rtc_clk); - s3c_rtc_enable(pdev, 1); - writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); - if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) { - tmp = readw(s3c_rtc_base + S3C2410_RTCCON); - writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); - } + if (info->data->enable) + info->data->enable(info); + + if (info->data->restore_tick_cnt) + info->data->restore_tick_cnt(info); - if (device_may_wakeup(dev) && wake_en) { - disable_irq_wake(s3c_rtc_alarmno); - wake_en = false; + s3c_rtc_disable_clk(info); + + if (device_may_wakeup(dev) && info->wake_en) { + disable_irq_wake(info->irq_alarm); + info->wake_en = false; } - clk_disable(rtc_clk); return 0; } #endif - static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume); -#ifdef CONFIG_OF -static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = { - [TYPE_S3C2410] = { TYPE_S3C2410 }, - [TYPE_S3C2416] = { TYPE_S3C2416 }, - [TYPE_S3C2443] = { TYPE_S3C2443 }, - [TYPE_S3C64XX] = { TYPE_S3C64XX }, +static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask) +{ + rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); +} + +static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask) +{ + rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); + writeb(mask, info->base + S3C2410_INTP); +} + +static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq) +{ + unsigned int tmp = 0; + int val; + + tmp = readb(info->base + S3C2410_TICNT); + tmp &= S3C2410_TICNT_ENABLE; + + val = (info->rtc->max_user_freq / freq) - 1; + tmp |= val; + + writel(tmp, info->base + S3C2410_TICNT); +} + +static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq) +{ + unsigned int tmp = 0; + int val; + + tmp = readb(info->base + S3C2410_TICNT); + tmp &= S3C2410_TICNT_ENABLE; + + val = (info->rtc->max_user_freq / freq) - 1; + + tmp |= S3C2443_TICNT_PART(val); + writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); + + writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2); + + writel(tmp, info->base + S3C2410_TICNT); +} + +static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq) +{ + unsigned int tmp = 0; + int val; + + tmp = readb(info->base + S3C2410_TICNT); + tmp &= S3C2410_TICNT_ENABLE; + + val = (info->rtc->max_user_freq / freq) - 1; + + tmp |= S3C2443_TICNT_PART(val); + writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); + + writel(tmp, info->base + S3C2410_TICNT); +} + +static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq) +{ + int val; + + val = (info->rtc->max_user_freq / freq) - 1; + writel(val, info->base + S3C2410_TICNT); +} + +static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq) +{ + unsigned int ticnt; + + ticnt = readb(info->base + S3C2410_TICNT); + ticnt &= S3C2410_TICNT_ENABLE; + + seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); +} + +static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info) +{ + unsigned int con; + + con = readw(info->base + S3C2410_RTCCON); + con |= S3C2443_RTCCON_TICSEL; + writew(con, info->base + S3C2410_RTCCON); +} + +static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq) +{ + unsigned int ticnt; + + ticnt = readw(info->base + S3C2410_RTCCON); + ticnt &= S3C64XX_RTCCON_TICEN; + + seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); +} + +static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info) +{ + info->ticnt_save = readb(info->base + S3C2410_TICNT); +} + +static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info) +{ + writeb(info->ticnt_save, info->base + S3C2410_TICNT); +} + +static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info) +{ + info->ticnt_en_save = readw(info->base + S3C2410_RTCCON); + info->ticnt_en_save &= S3C64XX_RTCCON_TICEN; + info->ticnt_save = readl(info->base + S3C2410_TICNT); +} + +static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info) +{ + unsigned int con; + + writel(info->ticnt_save, info->base + S3C2410_TICNT); + if (info->ticnt_en_save) { + con = readw(info->base + S3C2410_RTCCON); + writew(con | info->ticnt_en_save, + info->base + S3C2410_RTCCON); + } +} + +static struct s3c_rtc_data const s3c2410_rtc_data = { + .max_user_freq = 128, + .irq_handler = s3c24xx_rtc_irq, + .set_freq = s3c2410_rtc_setfreq, + .enable_tick = s3c24xx_rtc_enable_tick, + .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, + .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, + .enable = s3c24xx_rtc_enable, + .disable = s3c24xx_rtc_disable, +}; + +static struct s3c_rtc_data const s3c2416_rtc_data = { + .max_user_freq = 32768, + .irq_handler = s3c24xx_rtc_irq, + .set_freq = s3c2416_rtc_setfreq, + .enable_tick = s3c24xx_rtc_enable_tick, + .select_tick_clk = s3c2416_rtc_select_tick_clk, + .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, + .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, + .enable = s3c24xx_rtc_enable, + .disable = s3c24xx_rtc_disable, +}; + +static struct s3c_rtc_data const s3c2443_rtc_data = { + .max_user_freq = 32768, + .irq_handler = s3c24xx_rtc_irq, + .set_freq = s3c2443_rtc_setfreq, + .enable_tick = s3c24xx_rtc_enable_tick, + .select_tick_clk = s3c2416_rtc_select_tick_clk, + .save_tick_cnt = s3c24xx_rtc_save_tick_cnt, + .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt, + .enable = s3c24xx_rtc_enable, + .disable = s3c24xx_rtc_disable, +}; + +static struct s3c_rtc_data const s3c6410_rtc_data = { + .max_user_freq = 32768, + .needs_src_clk = true, + .irq_handler = s3c6410_rtc_irq, + .set_freq = s3c6410_rtc_setfreq, + .enable_tick = s3c6410_rtc_enable_tick, + .save_tick_cnt = s3c6410_rtc_save_tick_cnt, + .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt, + .enable = s3c24xx_rtc_enable, + .disable = s3c6410_rtc_disable, }; static const struct of_device_id s3c_rtc_dt_match[] = { { .compatible = "samsung,s3c2410-rtc", - .data = &s3c_rtc_drv_data_array[TYPE_S3C2410], + .data = (void *)&s3c2410_rtc_data, }, { .compatible = "samsung,s3c2416-rtc", - .data = &s3c_rtc_drv_data_array[TYPE_S3C2416], + .data = (void *)&s3c2416_rtc_data, }, { .compatible = "samsung,s3c2443-rtc", - .data = &s3c_rtc_drv_data_array[TYPE_S3C2443], + .data = (void *)&s3c2443_rtc_data, }, { .compatible = "samsung,s3c6410-rtc", - .data = &s3c_rtc_drv_data_array[TYPE_S3C64XX], - }, - {}, -}; -MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match); -#endif - -static struct platform_device_id s3c_rtc_driver_ids[] = { - { - .name = "s3c2410-rtc", - .driver_data = TYPE_S3C2410, - }, { - .name = "s3c2416-rtc", - .driver_data = TYPE_S3C2416, - }, { - .name = "s3c2443-rtc", - .driver_data = TYPE_S3C2443, + .data = (void *)&s3c6410_rtc_data, }, { - .name = "s3c64xx-rtc", - .driver_data = TYPE_S3C64XX, + .compatible = "samsung,exynos3250-rtc", + .data = (void *)&s3c6410_rtc_data, }, - { } + { /* sentinel */ }, }; - -MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids); +MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match); static struct platform_driver s3c_rtc_driver = { .probe = s3c_rtc_probe, .remove = s3c_rtc_remove, - .id_table = s3c_rtc_driver_ids, .driver = { .name = "s3c-rtc", - .owner = THIS_MODULE, .pm = &s3c_rtc_pm_ops, .of_match_table = of_match_ptr(s3c_rtc_dt_match), }, }; - module_platform_driver(s3c_rtc_driver); MODULE_DESCRIPTION("Samsung S3C RTC Driver");