645 lines
16 KiB
C
645 lines
16 KiB
C
/*
|
|
* SuperH On-Chip RTC Support
|
|
*
|
|
* Copyright (C) 2006 Paul Mundt
|
|
* Copyright (C) 2006 Jamie Lenehan
|
|
*
|
|
* Based on the old arch/sh/kernel/cpu/rtc.c by:
|
|
*
|
|
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
|
|
* Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/bcd.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/io.h>
|
|
|
|
#define DRV_NAME "sh-rtc"
|
|
#define DRV_VERSION "0.1.2"
|
|
|
|
#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
|
|
|
|
#define RTC_REG(r) ((r) * rtc_reg_size)
|
|
|
|
#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 */
|
|
|
|
/* ALARM Bits - or with BCD encoded value */
|
|
#define AR_ENB 0x80 /* Enable for alarm cmp */
|
|
|
|
/* RCR1 Bits */
|
|
#define RCR1_CF 0x80 /* Carry Flag */
|
|
#define RCR1_CIE 0x10 /* Carry Interrupt Enable */
|
|
#define RCR1_AIE 0x08 /* Alarm Interrupt Enable */
|
|
#define RCR1_AF 0x01 /* Alarm Flag */
|
|
|
|
/* RCR2 Bits */
|
|
#define RCR2_PEF 0x80 /* PEriodic interrupt Flag */
|
|
#define RCR2_PESMASK 0x70 /* Periodic interrupt Set */
|
|
#define RCR2_RTCEN 0x08 /* ENable RTC */
|
|
#define RCR2_ADJ 0x04 /* ADJustment (30-second) */
|
|
#define RCR2_RESET 0x02 /* Reset bit */
|
|
#define RCR2_START 0x01 /* Start bit */
|
|
|
|
struct sh_rtc {
|
|
void __iomem *regbase;
|
|
unsigned long regsize;
|
|
struct resource *res;
|
|
unsigned int alarm_irq, periodic_irq, carry_irq;
|
|
struct rtc_device *rtc_dev;
|
|
spinlock_t lock;
|
|
int rearm_aie;
|
|
};
|
|
|
|
static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev_id);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
unsigned int tmp, events = 0;
|
|
|
|
spin_lock(&rtc->lock);
|
|
|
|
tmp = readb(rtc->regbase + RCR1);
|
|
tmp &= ~RCR1_CF;
|
|
|
|
if (rtc->rearm_aie) {
|
|
if (tmp & RCR1_AF)
|
|
tmp &= ~RCR1_AF; /* try to clear AF again */
|
|
else {
|
|
tmp |= RCR1_AIE; /* AF has cleared, rearm IRQ */
|
|
rtc->rearm_aie = 0;
|
|
}
|
|
}
|
|
|
|
writeb(tmp, rtc->regbase + RCR1);
|
|
|
|
rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events);
|
|
|
|
spin_unlock(&rtc->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev_id);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
unsigned int tmp, events = 0;
|
|
|
|
spin_lock(&rtc->lock);
|
|
|
|
tmp = readb(rtc->regbase + RCR1);
|
|
|
|
/*
|
|
* If AF is set then the alarm has triggered. If we clear AF while
|
|
* the alarm time still matches the RTC time then AF will
|
|
* immediately be set again, and if AIE is enabled then the alarm
|
|
* interrupt will immediately be retrigger. So we clear AIE here
|
|
* and use rtc->rearm_aie so that the carry interrupt will keep
|
|
* trying to clear AF and once it stays cleared it'll re-enable
|
|
* AIE.
|
|
*/
|
|
if (tmp & RCR1_AF) {
|
|
events |= RTC_AF | RTC_IRQF;
|
|
|
|
tmp &= ~(RCR1_AF|RCR1_AIE);
|
|
|
|
writeb(tmp, rtc->regbase + RCR1);
|
|
|
|
rtc->rearm_aie = 1;
|
|
|
|
rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events);
|
|
}
|
|
|
|
spin_unlock(&rtc->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev_id);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
|
|
spin_lock(&rtc->lock);
|
|
|
|
rtc_update_irq(&rtc->rtc_dev->class_dev, 1, RTC_PF | RTC_IRQF);
|
|
|
|
spin_unlock(&rtc->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static inline void sh_rtc_setpie(struct device *dev, unsigned int enable)
|
|
{
|
|
struct sh_rtc *rtc = dev_get_drvdata(dev);
|
|
unsigned int tmp;
|
|
|
|
spin_lock_irq(&rtc->lock);
|
|
|
|
tmp = readb(rtc->regbase + RCR2);
|
|
|
|
if (enable) {
|
|
tmp &= ~RCR2_PESMASK;
|
|
tmp |= RCR2_PEF | (2 << 4);
|
|
} else
|
|
tmp &= ~(RCR2_PESMASK | RCR2_PEF);
|
|
|
|
writeb(tmp, rtc->regbase + RCR2);
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
}
|
|
|
|
static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
|
|
{
|
|
struct sh_rtc *rtc = dev_get_drvdata(dev);
|
|
unsigned int tmp;
|
|
|
|
spin_lock_irq(&rtc->lock);
|
|
|
|
tmp = readb(rtc->regbase + RCR1);
|
|
|
|
if (!enable) {
|
|
tmp &= ~RCR1_AIE;
|
|
rtc->rearm_aie = 0;
|
|
} else if (rtc->rearm_aie == 0)
|
|
tmp |= RCR1_AIE;
|
|
|
|
writeb(tmp, rtc->regbase + RCR1);
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
}
|
|
|
|
static int sh_rtc_open(struct device *dev)
|
|
{
|
|
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, IRQF_DISABLED,
|
|
"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, IRQF_DISABLED,
|
|
"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_alarm, IRQF_DISABLED,
|
|
"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);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sh_rtc_release(struct device *dev)
|
|
{
|
|
struct sh_rtc *rtc = dev_get_drvdata(dev);
|
|
|
|
sh_rtc_setpie(dev, 0);
|
|
sh_rtc_setaie(dev, 0);
|
|
|
|
free_irq(rtc->periodic_irq, dev);
|
|
free_irq(rtc->carry_irq, dev);
|
|
free_irq(rtc->alarm_irq, dev);
|
|
}
|
|
|
|
static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
|
|
{
|
|
struct sh_rtc *rtc = dev_get_drvdata(dev);
|
|
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");
|
|
|
|
tmp = readb(rtc->regbase + RCR2);
|
|
seq_printf(seq, "periodic_IRQ\t: %s\n",
|
|
(tmp & RCR2_PEF) ? "yes" : "no");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
|
|
{
|
|
unsigned int ret = -ENOIOCTLCMD;
|
|
|
|
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;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
unsigned int sec128, sec2, yr, yr100, cf_bit;
|
|
|
|
do {
|
|
unsigned int tmp;
|
|
|
|
spin_lock_irq(&rtc->lock);
|
|
|
|
tmp = readb(rtc->regbase + RCR1);
|
|
tmp &= ~RCR1_CF; /* Clear CF-bit */
|
|
tmp |= RCR1_CIE;
|
|
writeb(tmp, rtc->regbase + RCR1);
|
|
|
|
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)) - 1;
|
|
|
|
#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_year = (yr100 * 100 + BCD2BIN(yr)) - 1900;
|
|
|
|
sec2 = readb(rtc->regbase + R64CNT);
|
|
cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF;
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
} while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0);
|
|
|
|
#if RTC_BIT_INVERTED != 0
|
|
if ((sec128 & RTC_BIT_INVERTED))
|
|
tm->tm_sec--;
|
|
#endif
|
|
|
|
dev_dbg(&dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
|
|
"mday=%d, mon=%d, year=%d, wday=%d\n",
|
|
__FUNCTION__,
|
|
tm->tm_sec, tm->tm_min, tm->tm_hour,
|
|
tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
|
|
|
|
if (rtc_valid_tm(tm) < 0)
|
|
dev_err(dev, "invalid date\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
unsigned int tmp;
|
|
int year;
|
|
|
|
spin_lock_irq(&rtc->lock);
|
|
|
|
/* Reset pre-scaler & stop RTC */
|
|
tmp = readb(rtc->regbase + RCR2);
|
|
tmp |= RCR2_RESET;
|
|
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 + 1), 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
|
|
|
|
/* Start RTC */
|
|
tmp = readb(rtc->regbase + RCR2);
|
|
tmp &= ~RCR2_RESET;
|
|
tmp |= RCR2_RTCEN | RCR2_START;
|
|
writeb(tmp, rtc->regbase + RCR2);
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
|
|
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;
|
|
|
|
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 flag */
|
|
rcr1 = readb(rtc->regbase + RCR1);
|
|
rcr1 &= ~RCR1_AF;
|
|
writeb(rcr1 & ~RCR1_AIE, rtc->regbase + RCR1);
|
|
|
|
rtc->rearm_aie = 0;
|
|
|
|
/* 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);
|
|
|
|
/* Restore interrupt activation status */
|
|
writeb(rcr1, rtc->regbase + RCR1);
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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,
|
|
.proc = sh_rtc_proc,
|
|
};
|
|
|
|
static int __devinit sh_rtc_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_rtc *rtc;
|
|
struct resource *res;
|
|
int ret = -ENOENT;
|
|
|
|
rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
|
|
if (unlikely(!rtc))
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&rtc->lock);
|
|
|
|
rtc->periodic_irq = platform_get_irq(pdev, 0);
|
|
if (unlikely(rtc->periodic_irq < 0)) {
|
|
dev_err(&pdev->dev, "No IRQ for period\n");
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->carry_irq = platform_get_irq(pdev, 1);
|
|
if (unlikely(rtc->carry_irq < 0)) {
|
|
dev_err(&pdev->dev, "No IRQ for carry\n");
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->alarm_irq = platform_get_irq(pdev, 2);
|
|
if (unlikely(rtc->alarm_irq < 0)) {
|
|
dev_err(&pdev->dev, "No IRQ for alarm\n");
|
|
goto err_badres;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (unlikely(res == NULL)) {
|
|
dev_err(&pdev->dev, "No IO resource\n");
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->regsize = res->end - res->start + 1;
|
|
|
|
rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name);
|
|
if (unlikely(!rtc->res)) {
|
|
ret = -EBUSY;
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->regbase = (void __iomem *)rtc->res->start;
|
|
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)) {
|
|
ret = PTR_ERR(rtc->rtc_dev);
|
|
goto err_badmap;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rtc);
|
|
|
|
return 0;
|
|
|
|
err_badmap:
|
|
release_resource(rtc->res);
|
|
err_badres:
|
|
kfree(rtc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit sh_rtc_remove(struct platform_device *pdev)
|
|
{
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
|
|
if (likely(rtc->rtc_dev))
|
|
rtc_device_unregister(rtc->rtc_dev);
|
|
|
|
sh_rtc_setpie(&pdev->dev, 0);
|
|
sh_rtc_setaie(&pdev->dev, 0);
|
|
|
|
release_resource(rtc->res);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
kfree(rtc);
|
|
|
|
return 0;
|
|
}
|
|
static struct platform_driver sh_rtc_platform_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = sh_rtc_probe,
|
|
.remove = __devexit_p(sh_rtc_remove),
|
|
};
|
|
|
|
static int __init sh_rtc_init(void)
|
|
{
|
|
return platform_driver_register(&sh_rtc_platform_driver);
|
|
}
|
|
|
|
static void __exit sh_rtc_exit(void)
|
|
{
|
|
platform_driver_unregister(&sh_rtc_platform_driver);
|
|
}
|
|
|
|
module_init(sh_rtc_init);
|
|
module_exit(sh_rtc_exit);
|
|
|
|
MODULE_DESCRIPTION("SuperH on-chip RTC driver");
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, Jamie Lenehan <lenehan@twibble.org>");
|
|
MODULE_LICENSE("GPL");
|