1 files changed, 181 insertions, 57 deletions

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index e0d7b9991505..cf953ecbfca9 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -1,5 +1,8 @@
 /* drivers/rtc/rtc-s3c.c
  *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
  * Copyright (c) 2004,2006 Simtec Electronics
  *      Ben Dooks, <ben@simtec.co.uk>
  *      http://armlinux.simtec.co.uk/
@@ -21,6 +24,7 @@
 #include <linux/bcd.h>
 #include <linux/clk.h>
 #include <linux/log2.h>
+#include <linux/slab.h>
 
 #include <mach/hardware.h>
 #include <asm/uaccess.h>
@@ -28,14 +32,21 @@
 #include <asm/irq.h>
 #include <plat/regs-rtc.h>
 
+enum s3c_cpu_type {
+        TYPE_S3C2410,
+        TYPE_S3C64XX,
+};
+
 /* I have yet to find an S3C implementation with more than one
  * of these rtc blocks in */
 
 static struct resource *s3c_rtc_mem;
 
+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;
 
 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
 
@@ -46,6 +57,10 @@ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
         struct rtc_device *rdev = id;
 
         rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
+
+        if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+                writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
+
         return IRQ_HANDLED;
 }
 
@@ -54,6 +69,10 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
         struct rtc_device *rdev = id;
 
         rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+
+        if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+                writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
+
         return IRQ_HANDLED;
 }
 
@@ -79,12 +98,25 @@ static int s3c_rtc_setpie(struct device *dev, int enabled)
         pr_debug("%s: pie=%d\n", __func__, enabled);
 
         spin_lock_irq(&s3c_rtc_pie_lock);
-        tmp = readb(s3c_rtc_base + S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
 
-        if (enabled)
-                tmp |= S3C2410_TICNT_ENABLE;
+        if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+                tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
+                tmp &= ~S3C64XX_RTCCON_TICEN;
+
+                if (enabled)
+                        tmp |= S3C64XX_RTCCON_TICEN;
+
+                writew(tmp, s3c_rtc_base + S3C2410_RTCCON);
+        } else {
+                tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+                tmp &= ~S3C2410_TICNT_ENABLE;
+
+                if (enabled)
+                        tmp |= S3C2410_TICNT_ENABLE;
+
+                writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
+        }
 
-        writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
         spin_unlock_irq(&s3c_rtc_pie_lock);
 
         return 0;
@@ -92,17 +124,23 @@ static int s3c_rtc_setpie(struct device *dev, int enabled)
 
 static int s3c_rtc_setfreq(struct device *dev, int freq)
 {
-        unsigned int tmp;
+        struct platform_device *pdev = to_platform_device(dev);
+        struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
+        unsigned int tmp = 0;
 
         if (!is_power_of_2(freq))
                 return -EINVAL;
 
         spin_lock_irq(&s3c_rtc_pie_lock);
 
-        tmp = readb(s3c_rtc_base + S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
-        tmp |= (128 / freq)-1;
+        if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+                tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+                tmp &= S3C2410_TICNT_ENABLE;
+        }
+
+        tmp |= (rtc_dev->max_user_freq / freq)-1;
 
-        writeb(tmp, s3c_rtc_base + S3C2410_TICNT);
+        writel(tmp, s3c_rtc_base + S3C2410_TICNT);
         spin_unlock_irq(&s3c_rtc_pie_lock);
 
         return 0;
@@ -133,8 +171,8 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
                 goto retry_get_time;
         }
 
-        pr_debug("read time %02x.%02x.%02x %02x/%02x/%02x\n",
-                 rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
+        pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
+                 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
                  rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
 
         rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
@@ -147,7 +185,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
         rtc_tm->tm_year += 100;
         rtc_tm->tm_mon -= 1;
 
-        return 0;
+        return rtc_valid_tm(rtc_tm);
 }
 
 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
@@ -155,8 +193,8 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
         void __iomem *base = s3c_rtc_base;
         int year = tm->tm_year - 100;
 
-        pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
-                 tm->tm_year, tm->tm_mon, tm->tm_mday,
+        pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
+                 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
                  tm->tm_hour, tm->tm_min, tm->tm_sec);
 
         /* we get around y2k by simply not supporting it */
@@ -193,9 +231,9 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
 
-        pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
+        pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
                  alm_en,
-                 alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
+                 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);
 
 
@@ -204,34 +242,34 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
         if (alm_en & S3C2410_RTCALM_SECEN)
                 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
         else
-                alm_tm->tm_sec = 0xff;
+                alm_tm->tm_sec = -1;
 
         if (alm_en & S3C2410_RTCALM_MINEN)
                 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
         else
-                alm_tm->tm_min = 0xff;
+                alm_tm->tm_min = -1;
 
         if (alm_en & S3C2410_RTCALM_HOUREN)
                 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
         else
-                alm_tm->tm_hour = 0xff;
+                alm_tm->tm_hour = -1;
 
         if (alm_en & S3C2410_RTCALM_DAYEN)
                 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
         else
-                alm_tm->tm_mday = 0xff;
+                alm_tm->tm_mday = -1;
 
         if (alm_en & S3C2410_RTCALM_MONEN) {
                 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
                 alm_tm->tm_mon -= 1;
         } else {
-                alm_tm->tm_mon = 0xff;
+                alm_tm->tm_mon = -1;
         }
 
         if (alm_en & S3C2410_RTCALM_YEAREN)
                 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
         else
-                alm_tm->tm_year = 0xffff;
+                alm_tm->tm_year = -1;
 
         return 0;
 }
@@ -242,10 +280,10 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
         void __iomem *base = s3c_rtc_base;
         unsigned int alrm_en;
 
-        pr_debug("s3c_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
+        pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
                  alrm->enabled,
-                 tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff,
-                 tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
+                 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
+                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 
 
         alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
@@ -272,20 +310,22 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         s3c_rtc_setaie(alrm->enabled);
 
-        if (alrm->enabled)
-                enable_irq_wake(s3c_rtc_alarmno);
-        else
-                disable_irq_wake(s3c_rtc_alarmno);
-
         return 0;
 }
 
 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
 {
-        unsigned int ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
+        unsigned int ticnt;
 
-        seq_printf(seq, "periodic_IRQ\t: %s\n",
-                     (ticnt & S3C2410_TICNT_ENABLE) ? "yes" : "no" );
+        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;
+        }
+
+        seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
         return 0;
 }
 
@@ -339,7 +379,8 @@ static const struct rtc_class_ops s3c_rtcops = {
         .set_alarm      = s3c_rtc_setalarm,
         .irq_set_freq   = s3c_rtc_setfreq,
         .irq_set_state  = s3c_rtc_setpie,
-        .proc           = s3c_rtc_proc,
+        .proc           = s3c_rtc_proc,
+        .alarm_irq_enable = s3c_rtc_setaie,
 };
 
 static void s3c_rtc_enable(struct platform_device *pdev, int en)
@@ -351,33 +392,42 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en)
                 return;
 
         if (!en) {
-                tmp = readb(base + S3C2410_RTCCON);
-                writeb(tmp & ~S3C2410_RTCCON_RTCEN, base + S3C2410_RTCCON);
-
-                tmp = readb(base + S3C2410_TICNT);
-                writeb(tmp & ~S3C2410_TICNT_ENABLE, base + S3C2410_TICNT);
+                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_S3C2410) {
+                        tmp = readb(base + S3C2410_TICNT);
+                        tmp &= ~S3C2410_TICNT_ENABLE;
+                        writeb(tmp, base + S3C2410_TICNT);
+                }
         } else {
                 /* re-enable the device, and check it is ok */
 
-                if ((readb(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){
+                if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
                         dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
 
-                        tmp = readb(base + S3C2410_RTCCON);
-                        writeb(tmp|S3C2410_RTCCON_RTCEN, base+S3C2410_RTCCON);
+                        tmp = readw(base + S3C2410_RTCCON);
+                        writew(tmp | S3C2410_RTCCON_RTCEN,
+                                base + S3C2410_RTCCON);
                 }
 
-                if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){
+                if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
                         dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
 
-                        tmp = readb(base + S3C2410_RTCCON);
-                        writeb(tmp& ~S3C2410_RTCCON_CNTSEL, base+S3C2410_RTCCON);
+                        tmp = readw(base + S3C2410_RTCCON);
+                        writew(tmp & ~S3C2410_RTCCON_CNTSEL,
+                                base + S3C2410_RTCCON);
                 }
 
-                if ((readb(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){
+                if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
                         dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
 
-                        tmp = readb(base + S3C2410_RTCCON);
-                        writeb(tmp & ~S3C2410_RTCCON_CLKRST, base+S3C2410_RTCCON);
+                        tmp = readw(base + S3C2410_RTCCON);
+                        writew(tmp & ~S3C2410_RTCCON_CLKRST,
+                                base + S3C2410_RTCCON);
                 }
         }
 }
@@ -392,6 +442,10 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev)
         s3c_rtc_setpie(&dev->dev, 0);
         s3c_rtc_setaie(0);
 
+        clk_disable(rtc_clk);
+        clk_put(rtc_clk);
+        rtc_clk = NULL;
+
         iounmap(s3c_rtc_base);
         release_resource(s3c_rtc_mem);
         kfree(s3c_rtc_mem);
@@ -402,6 +456,7 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev)
 static int __devinit s3c_rtc_probe(struct platform_device *pdev)
 {
         struct rtc_device *rtc;
+        struct rtc_time rtc_tm;
         struct resource *res;
         int ret;
 
@@ -449,14 +504,22 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
                 goto err_nomap;
         }
 
+        rtc_clk = 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;
+                goto err_clk;
+        }
+
+        clk_enable(rtc_clk);
+
         /* check to see if everything is setup correctly */
 
         s3c_rtc_enable(pdev, 1);
 
-        pr_debug("s3c2410_rtc: RTCCON=%02x\n",
-                 readb(s3c_rtc_base + S3C2410_RTCCON));
-
-        s3c_rtc_setfreq(&pdev->dev, 1);
+        pr_debug("s3c2410_rtc: RTCCON=%02x\n",
+                 readw(s3c_rtc_base + S3C2410_RTCCON));
 
         device_init_wakeup(&pdev->dev, 1);
 
@@ -471,13 +534,42 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
                 goto err_nortc;
         }
 
-        rtc->max_user_freq = 128;
+        s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
+
+        /* Check RTC Time */
+
+        s3c_rtc_gettime(NULL, &rtc_tm);
+
+        if (rtc_valid_tm(&rtc_tm)) {
+                rtc_tm.tm_year  = 100;
+                rtc_tm.tm_mon   = 0;
+                rtc_tm.tm_mday  = 1;
+                rtc_tm.tm_hour  = 0;
+                rtc_tm.tm_min   = 0;
+                rtc_tm.tm_sec   = 0;
+
+                s3c_rtc_settime(NULL, &rtc_tm);
+
+                dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
+        }
+
+        if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+                rtc->max_user_freq = 32768;
+        else
+                rtc->max_user_freq = 128;
 
         platform_set_drvdata(pdev, rtc);
+
+        s3c_rtc_setfreq(&pdev->dev, 1);
+
         return 0;
 
  err_nortc:
         s3c_rtc_enable(pdev, 0);
+        clk_disable(rtc_clk);
+        clk_put(rtc_clk);
+
+ err_clk:
         iounmap(s3c_rtc_base);
 
  err_nomap:
@@ -491,20 +583,38 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
 
 /* RTC Power management control */
 
-static int ticnt_save;
+static int ticnt_save, ticnt_en_save;
 
 static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
         /* 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(&pdev->dev))
+                enable_irq_wake(s3c_rtc_alarmno);
+
         return 0;
 }
 
 static int s3c_rtc_resume(struct platform_device *pdev)
 {
+        unsigned int tmp;
+
         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 (device_may_wakeup(&pdev->dev))
+                disable_irq_wake(s3c_rtc_alarmno);
+
         return 0;
 }
 #else
@@ -512,13 +622,27 @@ static int s3c_rtc_resume(struct platform_device *pdev)
 #define s3c_rtc_resume  NULL
 #endif
 
-static struct platform_driver s3c2410_rtc_driver = {
+static struct platform_device_id s3c_rtc_driver_ids[] = {
+        {
+                .name           = "s3c2410-rtc",
+                .driver_data    = TYPE_S3C2410,
+        }, {
+                .name           = "s3c64xx-rtc",
+                .driver_data    = TYPE_S3C64XX,
+        },
+        { }
+};
+
+MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
+
+static struct platform_driver s3c_rtc_driver = {
         .probe          = s3c_rtc_probe,
         .remove         = __devexit_p(s3c_rtc_remove),
         .suspend        = s3c_rtc_suspend,
         .resume         = s3c_rtc_resume,
+        .id_table       = s3c_rtc_driver_ids,
         .driver         = {
-                .name   = "s3c2410-rtc",
+                .name   = "s3c-rtc",
                 .owner  = THIS_MODULE,
         },
 };
@@ -528,12 +652,12 @@ static char __initdata banner[] = "S3C24XX RTC, (c) 2004,2006 Simtec Electronics
 static int __init s3c_rtc_init(void)
 {
         printk(banner);
-        return platform_driver_register(&s3c2410_rtc_driver);
+        return platform_driver_register(&s3c_rtc_driver);
 }
 
 static void __exit s3c_rtc_exit(void)
 {
-        platform_driver_unregister(&s3c2410_rtc_driver);
+        platform_driver_unregister(&s3c_rtc_driver);
 }
 
 module_init(s3c_rtc_init);