/*
* SuperH On-Chip RTC Support
*
- * Copyright (C) 2006 Paul Mundt
+ * Copyright (C) 2006, 2007, 2008 Paul Mundt
+ * Copyright (C) 2006 Jamie Lenehan
+ * Copyright (C) 2008 Angelo Castello
*
* Based on the old arch/sh/kernel/cpu/rtc.c by:
*
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
-#include <asm/io.h>
-
-#ifdef CONFIG_CPU_SH3
-#define rtc_reg_size sizeof(u16)
-#define RTC_BIT_INVERTED 0 /* No bug on SH7708, SH7709A */
-#elif defined(CONFIG_CPU_SH4)
-#define rtc_reg_size sizeof(u32)
-#define RTC_BIT_INVERTED 0x40 /* bug on SH7750, SH7750S */
-#endif
+#include <linux/io.h>
+#include <asm/rtc.h>
+
+#define DRV_NAME "sh-rtc"
+#define DRV_VERSION "0.2.0"
#define RTC_REG(r) ((r) * rtc_reg_size)
-#define R64CNT RTC_REG(0)
-#define RSECCNT RTC_REG(1)
-#define RMINCNT RTC_REG(2)
-#define RHRCNT RTC_REG(3)
-#define RWKCNT RTC_REG(4)
-#define RDAYCNT RTC_REG(5)
-#define RMONCNT RTC_REG(6)
-#define RYRCNT RTC_REG(7)
-#define RSECAR RTC_REG(8)
-#define RMINAR RTC_REG(9)
-#define RHRAR RTC_REG(10)
-#define RWKAR RTC_REG(11)
-#define RDAYAR RTC_REG(12)
-#define RMONAR RTC_REG(13)
-#define RCR1 RTC_REG(14)
-#define RCR2 RTC_REG(15)
+#define R64CNT RTC_REG(0)
+
+#define RSECCNT RTC_REG(1) /* RTC sec */
+#define RMINCNT RTC_REG(2) /* RTC min */
+#define RHRCNT RTC_REG(3) /* RTC hour */
+#define RWKCNT RTC_REG(4) /* RTC week */
+#define RDAYCNT RTC_REG(5) /* RTC day */
+#define RMONCNT RTC_REG(6) /* RTC month */
+#define RYRCNT RTC_REG(7) /* RTC year */
+#define RSECAR RTC_REG(8) /* ALARM sec */
+#define RMINAR RTC_REG(9) /* ALARM min */
+#define RHRAR RTC_REG(10) /* ALARM hour */
+#define RWKAR RTC_REG(11) /* ALARM week */
+#define RDAYAR RTC_REG(12) /* ALARM day */
+#define RMONAR RTC_REG(13) /* ALARM month */
+#define RCR1 RTC_REG(14) /* Control */
+#define RCR2 RTC_REG(15) /* Control */
+
+/*
+ * Note on RYRAR and RCR3: Up until this point most of the register
+ * definitions are consistent across all of the available parts. However,
+ * the placement of the optional RYRAR and RCR3 (the RYRAR control
+ * register used to control RYRCNT/RYRAR compare) varies considerably
+ * across various parts, occasionally being mapped in to a completely
+ * unrelated address space. For proper RYRAR support a separate resource
+ * would have to be handed off, but as this is purely optional in
+ * practice, we simply opt not to support it, thereby keeping the code
+ * quite a bit more simplified.
+ */
+
+/* ALARM Bits - or with BCD encoded value */
+#define AR_ENB 0x80 /* Enable for alarm cmp */
+
+/* Period Bits */
+#define PF_HP 0x100 /* Enable Half Period to support 8,32,128Hz */
+#define PF_COUNT 0x200 /* Half periodic counter */
+#define PF_OXS 0x400 /* Periodic One x Second */
+#define PF_KOU 0x800 /* Kernel or User periodic request 1=kernel */
+#define PF_MASK 0xf00
/* RCR1 Bits */
#define RCR1_CF 0x80 /* Carry Flag */
unsigned int alarm_irq, periodic_irq, carry_irq;
struct rtc_device *rtc_dev;
spinlock_t lock;
+ unsigned long capabilities; /* See asm-sh/rtc.h for cap bits */
+ unsigned short periodic_freq;
};
-static irqreturn_t sh_rtc_interrupt(int irq, void *id)
+static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
{
- struct platform_device *pdev = id;
- struct sh_rtc *rtc = platform_get_drvdata(pdev);
- unsigned int tmp, events = 0;
+ struct sh_rtc *rtc = dev_id;
+ unsigned int tmp;
spin_lock(&rtc->lock);
tmp = readb(rtc->regbase + RCR1);
+ tmp &= ~RCR1_CF;
+ writeb(tmp, rtc->regbase + RCR1);
- if (tmp & RCR1_AF)
- events |= RTC_AF | RTC_IRQF;
+ /* Users have requested One x Second IRQ */
+ if (rtc->periodic_freq & PF_OXS)
+ rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF);
- tmp &= ~(RCR1_CF | RCR1_AF);
+ spin_unlock(&rtc->lock);
- writeb(tmp, rtc->regbase + RCR1);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
+{
+ struct sh_rtc *rtc = dev_id;
+ unsigned int tmp;
- rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events);
+ spin_lock(&rtc->lock);
+
+ tmp = readb(rtc->regbase + RCR1);
+ tmp &= ~(RCR1_AF | RCR1_AIE);
+ writeb(tmp, rtc->regbase + RCR1);
+
+ rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
spin_unlock(&rtc->lock);
return IRQ_HANDLED;
}
-static irqreturn_t sh_rtc_periodic(int irq, void *id)
+static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
{
- struct sh_rtc *rtc = dev_get_drvdata(id);
+ struct sh_rtc *rtc = dev_id;
+ struct rtc_device *rtc_dev = rtc->rtc_dev;
+ unsigned int tmp;
spin_lock(&rtc->lock);
- rtc_update_irq(&rtc->rtc_dev->class_dev, 1, RTC_PF | RTC_IRQF);
+ tmp = readb(rtc->regbase + RCR2);
+ tmp &= ~RCR2_PEF;
+ writeb(tmp, rtc->regbase + RCR2);
+
+ /* Half period enabled than one skipped and the next notified */
+ if ((rtc->periodic_freq & PF_HP) && (rtc->periodic_freq & PF_COUNT))
+ rtc->periodic_freq &= ~PF_COUNT;
+ else {
+ if (rtc->periodic_freq & PF_HP)
+ rtc->periodic_freq |= PF_COUNT;
+ if (rtc->periodic_freq & PF_KOU) {
+ spin_lock(&rtc_dev->irq_task_lock);
+ if (rtc_dev->irq_task)
+ rtc_dev->irq_task->func(rtc_dev->irq_task->private_data);
+ spin_unlock(&rtc_dev->irq_task_lock);
+ } else
+ rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
+ }
spin_unlock(&rtc->lock);
tmp = readb(rtc->regbase + RCR2);
if (enable) {
- tmp &= ~RCR2_PESMASK;
- tmp |= RCR2_PEF | (2 << 4);
+ tmp &= ~RCR2_PEF; /* Clear PES bit */
+ tmp |= (rtc->periodic_freq & ~PF_HP); /* Set PES2-0 */
} else
tmp &= ~(RCR2_PESMASK | RCR2_PEF);
spin_unlock_irq(&rtc->lock);
}
-static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
+static inline int sh_rtc_setfreq(struct device *dev, unsigned int freq)
{
struct sh_rtc *rtc = dev_get_drvdata(dev);
- unsigned int tmp;
+ int tmp, ret = 0;
spin_lock_irq(&rtc->lock);
+ tmp = rtc->periodic_freq & PF_MASK;
- tmp = readb(rtc->regbase + RCR1);
-
- if (enable)
- tmp |= RCR1_AIE;
- else
- tmp &= ~RCR1_AIE;
+ switch (freq) {
+ case 0:
+ rtc->periodic_freq = 0x00;
+ break;
+ case 1:
+ rtc->periodic_freq = 0x60;
+ break;
+ case 2:
+ rtc->periodic_freq = 0x50;
+ break;
+ case 4:
+ rtc->periodic_freq = 0x40;
+ break;
+ case 8:
+ rtc->periodic_freq = 0x30 | PF_HP;
+ break;
+ case 16:
+ rtc->periodic_freq = 0x30;
+ break;
+ case 32:
+ rtc->periodic_freq = 0x20 | PF_HP;
+ break;
+ case 64:
+ rtc->periodic_freq = 0x20;
+ break;
+ case 128:
+ rtc->periodic_freq = 0x10 | PF_HP;
+ break;
+ case 256:
+ rtc->periodic_freq = 0x10;
+ break;
+ default:
+ ret = -ENOTSUPP;
+ }
- writeb(tmp, rtc->regbase + RCR1);
+ if (ret == 0) {
+ rtc->periodic_freq |= tmp;
+ rtc->rtc_dev->irq_freq = freq;
+ }
spin_unlock_irq(&rtc->lock);
+ return ret;
}
-static int sh_rtc_open(struct device *dev)
+static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
{
struct sh_rtc *rtc = dev_get_drvdata(dev);
unsigned int tmp;
- int ret;
-
- tmp = readb(rtc->regbase + RCR1);
- tmp &= ~RCR1_CF;
- tmp |= RCR1_CIE;
- writeb(tmp, rtc->regbase + RCR1);
-
- ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, SA_INTERRUPT,
- "sh-rtc period", dev);
- if (unlikely(ret)) {
- dev_err(dev, "request period IRQ failed with %d, IRQ %d\n",
- ret, rtc->periodic_irq);
- return ret;
- }
-
- ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, SA_INTERRUPT,
- "sh-rtc carry", dev);
- if (unlikely(ret)) {
- dev_err(dev, "request carry IRQ failed with %d, IRQ %d\n",
- ret, rtc->carry_irq);
- free_irq(rtc->periodic_irq, dev);
- goto err_bad_carry;
- }
- ret = request_irq(rtc->alarm_irq, sh_rtc_interrupt, SA_INTERRUPT,
- "sh-rtc alarm", dev);
- if (unlikely(ret)) {
- dev_err(dev, "request alarm IRQ failed with %d, IRQ %d\n",
- ret, rtc->alarm_irq);
- goto err_bad_alarm;
- }
-
- return 0;
-
-err_bad_alarm:
- free_irq(rtc->carry_irq, dev);
-err_bad_carry:
- free_irq(rtc->periodic_irq, dev);
+ spin_lock_irq(&rtc->lock);
- return ret;
-}
+ tmp = readb(rtc->regbase + RCR1);
-static void sh_rtc_release(struct device *dev)
-{
- struct sh_rtc *rtc = dev_get_drvdata(dev);
+ if (!enable)
+ tmp &= ~RCR1_AIE;
+ else
+ tmp |= RCR1_AIE;
- sh_rtc_setpie(dev, 0);
+ writeb(tmp, rtc->regbase + RCR1);
- free_irq(rtc->periodic_irq, dev);
- free_irq(rtc->carry_irq, dev);
- free_irq(rtc->alarm_irq, dev);
+ spin_unlock_irq(&rtc->lock);
}
static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
unsigned int tmp;
tmp = readb(rtc->regbase + RCR1);
- seq_printf(seq, "alarm_IRQ\t: %s\n",
- (tmp & RCR1_AIE) ? "yes" : "no");
- seq_printf(seq, "carry_IRQ\t: %s\n",
- (tmp & RCR1_CIE) ? "yes" : "no");
+ seq_printf(seq, "carry_IRQ\t: %s\n", (tmp & RCR1_CIE) ? "yes" : "no");
tmp = readb(rtc->regbase + RCR2);
seq_printf(seq, "periodic_IRQ\t: %s\n",
- (tmp & RCR2_PEF) ? "yes" : "no");
+ (tmp & RCR2_PESMASK) ? "yes" : "no");
return 0;
}
static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
- unsigned int ret = -ENOIOCTLCMD;
+ struct sh_rtc *rtc = dev_get_drvdata(dev);
+ unsigned int ret = 0;
switch (cmd) {
case RTC_PIE_OFF:
case RTC_PIE_ON:
sh_rtc_setpie(dev, cmd == RTC_PIE_ON);
- ret = 0;
break;
case RTC_AIE_OFF:
case RTC_AIE_ON:
sh_rtc_setaie(dev, cmd == RTC_AIE_ON);
- ret = 0;
break;
+ case RTC_UIE_OFF:
+ rtc->periodic_freq &= ~PF_OXS;
+ break;
+ case RTC_UIE_ON:
+ rtc->periodic_freq |= PF_OXS;
+ break;
+ case RTC_IRQP_READ:
+ ret = put_user(rtc->rtc_dev->irq_freq,
+ (unsigned long __user *)arg);
+ break;
+ case RTC_IRQP_SET:
+ ret = sh_rtc_setfreq(dev, arg);
+ break;
+ default:
+ ret = -ENOIOCTLCMD;
}
return ret;
sec128 = readb(rtc->regbase + R64CNT);
- tm->tm_sec = BCD2BIN(readb(rtc->regbase + RSECCNT));
- tm->tm_min = BCD2BIN(readb(rtc->regbase + RMINCNT));
- tm->tm_hour = BCD2BIN(readb(rtc->regbase + RHRCNT));
- tm->tm_wday = BCD2BIN(readb(rtc->regbase + RWKCNT));
- tm->tm_mday = BCD2BIN(readb(rtc->regbase + RDAYCNT));
- tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT));
-
-#if defined(CONFIG_CPU_SH4)
- yr = readw(rtc->regbase + RYRCNT);
- yr100 = BCD2BIN(yr >> 8);
- yr &= 0xff;
-#else
- yr = readb(rtc->regbase + RYRCNT);
- yr100 = BCD2BIN((yr == 0x99) ? 0x19 : 0x20);
-#endif
+ tm->tm_sec = bcd2bin(readb(rtc->regbase + RSECCNT));
+ tm->tm_min = bcd2bin(readb(rtc->regbase + RMINCNT));
+ tm->tm_hour = bcd2bin(readb(rtc->regbase + RHRCNT));
+ tm->tm_wday = bcd2bin(readb(rtc->regbase + RWKCNT));
+ tm->tm_mday = bcd2bin(readb(rtc->regbase + RDAYCNT));
+ tm->tm_mon = bcd2bin(readb(rtc->regbase + RMONCNT)) - 1;
+
+ if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {
+ yr = readw(rtc->regbase + RYRCNT);
+ yr100 = bcd2bin(yr >> 8);
+ yr &= 0xff;
+ } else {
+ yr = readb(rtc->regbase + RYRCNT);
+ yr100 = bcd2bin((yr == 0x99) ? 0x19 : 0x20);
+ }
- tm->tm_year = (yr100 * 100 + BCD2BIN(yr)) - 1900;
+ tm->tm_year = (yr100 * 100 + bcd2bin(yr)) - 1900;
sec2 = readb(rtc->regbase + R64CNT);
cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF;
tm->tm_sec--;
#endif
- dev_dbg(&dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
+ dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
"mday=%d, mon=%d, year=%d, wday=%d\n",
- __FUNCTION__,
+ __func__,
tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+ tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
- if (rtc_valid_tm(tm) < 0)
+ if (rtc_valid_tm(tm) < 0) {
dev_err(dev, "invalid date\n");
+ rtc_time_to_tm(0, tm);
+ }
return 0;
}
/* Reset pre-scaler & stop RTC */
tmp = readb(rtc->regbase + RCR2);
tmp |= RCR2_RESET;
+ tmp &= ~RCR2_START;
writeb(tmp, rtc->regbase + RCR2);
- writeb(BIN2BCD(tm->tm_sec), rtc->regbase + RSECCNT);
- writeb(BIN2BCD(tm->tm_min), rtc->regbase + RMINCNT);
- writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT);
- writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT);
- writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT);
- writeb(BIN2BCD(tm->tm_mon), rtc->regbase + RMONCNT);
-
-#ifdef CONFIG_CPU_SH3
- year = tm->tm_year % 100;
- writeb(BIN2BCD(year), rtc->regbase + RYRCNT);
-#else
- year = (BIN2BCD((tm->tm_year + 1900) / 100) << 8) |
- BIN2BCD(tm->tm_year % 100);
- writew(year, rtc->regbase + RYRCNT);
-#endif
+ writeb(bin2bcd(tm->tm_sec), rtc->regbase + RSECCNT);
+ writeb(bin2bcd(tm->tm_min), rtc->regbase + RMINCNT);
+ writeb(bin2bcd(tm->tm_hour), rtc->regbase + RHRCNT);
+ writeb(bin2bcd(tm->tm_wday), rtc->regbase + RWKCNT);
+ writeb(bin2bcd(tm->tm_mday), rtc->regbase + RDAYCNT);
+ writeb(bin2bcd(tm->tm_mon + 1), rtc->regbase + RMONCNT);
+
+ if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {
+ year = (bin2bcd((tm->tm_year + 1900) / 100) << 8) |
+ bin2bcd(tm->tm_year % 100);
+ writew(year, rtc->regbase + RYRCNT);
+ } else {
+ year = tm->tm_year % 100;
+ writeb(bin2bcd(year), rtc->regbase + RYRCNT);
+ }
/* Start RTC */
tmp = readb(rtc->regbase + RCR2);
return 0;
}
+static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off)
+{
+ unsigned int byte;
+ int value = 0xff; /* return 0xff for ignored values */
+
+ byte = readb(rtc->regbase + reg_off);
+ if (byte & AR_ENB) {
+ byte &= ~AR_ENB; /* strip the enable bit */
+ value = bcd2bin(byte);
+ }
+
+ return value;
+}
+
+static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+ struct rtc_time *tm = &wkalrm->time;
+
+ spin_lock_irq(&rtc->lock);
+
+ tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR);
+ tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR);
+ tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR);
+ tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR);
+ tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR);
+ tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR);
+ if (tm->tm_mon > 0)
+ tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */
+ tm->tm_year = 0xffff;
+
+ wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0;
+
+ spin_unlock_irq(&rtc->lock);
+
+ return 0;
+}
+
+static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc,
+ int value, int reg_off)
+{
+ /* < 0 for a value that is ignored */
+ if (value < 0)
+ writeb(0, rtc->regbase + reg_off);
+ else
+ writeb(bin2bcd(value) | AR_ENB, rtc->regbase + reg_off);
+}
+
+static int sh_rtc_check_alarm(struct rtc_time *tm)
+{
+ /*
+ * The original rtc says anything > 0xc0 is "don't care" or "match
+ * all" - most users use 0xff but rtc-dev uses -1 for the same thing.
+ * The original rtc doesn't support years - some things use -1 and
+ * some 0xffff. We use -1 to make out tests easier.
+ */
+ if (tm->tm_year == 0xffff)
+ tm->tm_year = -1;
+ if (tm->tm_mon >= 0xff)
+ tm->tm_mon = -1;
+ if (tm->tm_mday >= 0xff)
+ tm->tm_mday = -1;
+ if (tm->tm_wday >= 0xff)
+ tm->tm_wday = -1;
+ if (tm->tm_hour >= 0xff)
+ tm->tm_hour = -1;
+ if (tm->tm_min >= 0xff)
+ tm->tm_min = -1;
+ if (tm->tm_sec >= 0xff)
+ tm->tm_sec = -1;
+
+ if (tm->tm_year > 9999 ||
+ tm->tm_mon >= 12 ||
+ tm->tm_mday == 0 || tm->tm_mday >= 32 ||
+ tm->tm_wday >= 7 ||
+ tm->tm_hour >= 24 ||
+ tm->tm_min >= 60 ||
+ tm->tm_sec >= 60)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+ unsigned int rcr1;
+ struct rtc_time *tm = &wkalrm->time;
+ int mon, err;
+
+ err = sh_rtc_check_alarm(tm);
+ if (unlikely(err < 0))
+ return err;
+
+ spin_lock_irq(&rtc->lock);
+
+ /* disable alarm interrupt and clear the alarm flag */
+ rcr1 = readb(rtc->regbase + RCR1);
+ rcr1 &= ~(RCR1_AF | RCR1_AIE);
+ writeb(rcr1, rtc->regbase + RCR1);
+
+ /* set alarm time */
+ sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR);
+ mon = tm->tm_mon;
+ if (mon >= 0)
+ mon += 1;
+ sh_rtc_write_alarm_value(rtc, mon, RMONAR);
+
+ if (wkalrm->enabled) {
+ rcr1 |= RCR1_AIE;
+ writeb(rcr1, rtc->regbase + RCR1);
+ }
+
+ spin_unlock_irq(&rtc->lock);
+
+ return 0;
+}
+
+static int sh_rtc_irq_set_state(struct device *dev, int enabled)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+
+ if (enabled) {
+ rtc->periodic_freq |= PF_KOU;
+ return sh_rtc_ioctl(dev, RTC_PIE_ON, 0);
+ } else {
+ rtc->periodic_freq &= ~PF_KOU;
+ return sh_rtc_ioctl(dev, RTC_PIE_OFF, 0);
+ }
+}
+
+static int sh_rtc_irq_set_freq(struct device *dev, int freq)
+{
+ return sh_rtc_ioctl(dev, RTC_IRQP_SET, freq);
+}
+
static struct rtc_class_ops sh_rtc_ops = {
- .open = sh_rtc_open,
- .release = sh_rtc_release,
.ioctl = sh_rtc_ioctl,
.read_time = sh_rtc_read_time,
.set_time = sh_rtc_set_time,
+ .read_alarm = sh_rtc_read_alarm,
+ .set_alarm = sh_rtc_set_alarm,
+ .irq_set_state = sh_rtc_irq_set_state,
+ .irq_set_freq = sh_rtc_irq_set_freq,
.proc = sh_rtc_proc,
};
{
struct sh_rtc *rtc;
struct resource *res;
- int ret = -ENOENT;
+ unsigned int tmp;
+ int ret;
rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
if (unlikely(!rtc))
spin_lock_init(&rtc->lock);
- rtc->periodic_irq = platform_get_irq(pdev, 0);
- if (unlikely(rtc->periodic_irq < 0)) {
+ /* get periodic/carry/alarm irqs */
+ ret = platform_get_irq(pdev, 0);
+ if (unlikely(ret < 0)) {
+ ret = -ENOENT;
dev_err(&pdev->dev, "No IRQ for period\n");
goto err_badres;
}
+ rtc->periodic_irq = ret;
- rtc->carry_irq = platform_get_irq(pdev, 1);
- if (unlikely(rtc->carry_irq < 0)) {
+ ret = platform_get_irq(pdev, 1);
+ if (unlikely(ret < 0)) {
+ ret = -ENOENT;
dev_err(&pdev->dev, "No IRQ for carry\n");
goto err_badres;
}
+ rtc->carry_irq = ret;
- rtc->alarm_irq = platform_get_irq(pdev, 2);
- if (unlikely(rtc->alarm_irq < 0)) {
+ ret = platform_get_irq(pdev, 2);
+ if (unlikely(ret < 0)) {
+ ret = -ENOENT;
dev_err(&pdev->dev, "No IRQ for alarm\n");
goto err_badres;
}
+ rtc->alarm_irq = ret;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (unlikely(res == NULL)) {
+ ret = -ENOENT;
dev_err(&pdev->dev, "No IO resource\n");
goto err_badres;
}
goto err_badres;
}
- rtc->regbase = (void __iomem *)rtc->res->start;
+ rtc->regbase = ioremap_nocache(rtc->res->start, rtc->regsize);
if (unlikely(!rtc->regbase)) {
ret = -EINVAL;
goto err_badmap;
rtc->rtc_dev = rtc_device_register("sh", &pdev->dev,
&sh_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc)) {
+ if (IS_ERR(rtc->rtc_dev)) {
ret = PTR_ERR(rtc->rtc_dev);
- goto err_badmap;
+ goto err_unmap;
}
+ rtc->capabilities = RTC_DEF_CAPABILITIES;
+ if (pdev->dev.platform_data) {
+ struct sh_rtc_platform_info *pinfo = pdev->dev.platform_data;
+
+ /*
+ * Some CPUs have special capabilities in addition to the
+ * default set. Add those in here.
+ */
+ rtc->capabilities |= pinfo->capabilities;
+ }
+
+ rtc->rtc_dev->max_user_freq = 256;
+ rtc->rtc_dev->irq_freq = 1;
+ rtc->periodic_freq = 0x60;
+
platform_set_drvdata(pdev, rtc);
+ /* register periodic/carry/alarm irqs */
+ ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED,
+ "sh-rtc period", rtc);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev,
+ "request period IRQ failed with %d, IRQ %d\n", ret,
+ rtc->periodic_irq);
+ goto err_unmap;
+ }
+
+ ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED,
+ "sh-rtc carry", rtc);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev,
+ "request carry IRQ failed with %d, IRQ %d\n", ret,
+ rtc->carry_irq);
+ free_irq(rtc->periodic_irq, rtc);
+ goto err_unmap;
+ }
+
+ ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED,
+ "sh-rtc alarm", rtc);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev,
+ "request alarm IRQ failed with %d, IRQ %d\n", ret,
+ rtc->alarm_irq);
+ free_irq(rtc->carry_irq, rtc);
+ free_irq(rtc->periodic_irq, rtc);
+ goto err_unmap;
+ }
+
+ tmp = readb(rtc->regbase + RCR1);
+ tmp &= ~RCR1_CF;
+ tmp |= RCR1_CIE;
+ writeb(tmp, rtc->regbase + RCR1);
+
return 0;
+err_unmap:
+ iounmap(rtc->regbase);
err_badmap:
release_resource(rtc->res);
err_badres:
sh_rtc_setpie(&pdev->dev, 0);
sh_rtc_setaie(&pdev->dev, 0);
+ free_irq(rtc->carry_irq, rtc);
+ free_irq(rtc->periodic_irq, rtc);
+ free_irq(rtc->alarm_irq, rtc);
+
release_resource(rtc->res);
+ iounmap(rtc->regbase);
+
platform_set_drvdata(pdev, NULL);
kfree(rtc);
}
static struct platform_driver sh_rtc_platform_driver = {
.driver = {
- .name = "sh-rtc",
+ .name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = sh_rtc_probe,
module_exit(sh_rtc_exit);
MODULE_DESCRIPTION("SuperH on-chip RTC driver");
-MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, "
+ "Jamie Lenehan <lenehan@twibble.org>, "
+ "Angelo Castello <angelo.castello@st.com>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);