#include <linux/io.h>
#include <linux/module.h>
-enum ds1511reg {
- DS1511_SEC = 0x0,
- DS1511_MIN = 0x1,
- DS1511_HOUR = 0x2,
- DS1511_DOW = 0x3,
- DS1511_DOM = 0x4,
- DS1511_MONTH = 0x5,
- DS1511_YEAR = 0x6,
- DS1511_CENTURY = 0x7,
- DS1511_AM1_SEC = 0x8,
- DS1511_AM2_MIN = 0x9,
- DS1511_AM3_HOUR = 0xa,
- DS1511_AM4_DATE = 0xb,
- DS1511_WD_MSEC = 0xc,
- DS1511_WD_SEC = 0xd,
- DS1511_CONTROL_A = 0xe,
- DS1511_CONTROL_B = 0xf,
- DS1511_RAMADDR_LSB = 0x10,
- DS1511_RAMDATA = 0x13
-};
+#define DS1511_SEC 0x0
+#define DS1511_MIN 0x1
+#define DS1511_HOUR 0x2
+#define DS1511_DOW 0x3
+#define DS1511_DOM 0x4
+#define DS1511_MONTH 0x5
+#define DS1511_YEAR 0x6
+#define DS1511_CENTURY 0x7
+#define DS1511_AM1_SEC 0x8
+#define DS1511_AM2_MIN 0x9
+#define DS1511_AM3_HOUR 0xa
+#define DS1511_AM4_DATE 0xb
+#define DS1511_WD_MSEC 0xc
+#define DS1511_WD_SEC 0xd
+#define DS1511_CONTROL_A 0xe
+#define DS1511_CONTROL_B 0xf
+#define DS1511_RAMADDR_LSB 0x10
+#define DS1511_RAMDATA 0x13
#define DS1511_BLF1 0x80
#define DS1511_BLF2 0x40
#define DS1511_WDS 0x01
#define DS1511_RAM_MAX 0x100
-#define RTC_CMD DS1511_CONTROL_B
-#define RTC_CMD1 DS1511_CONTROL_A
-
-#define RTC_ALARM_SEC DS1511_AM1_SEC
-#define RTC_ALARM_MIN DS1511_AM2_MIN
-#define RTC_ALARM_HOUR DS1511_AM3_HOUR
-#define RTC_ALARM_DATE DS1511_AM4_DATE
-
-#define RTC_SEC DS1511_SEC
-#define RTC_MIN DS1511_MIN
-#define RTC_HOUR DS1511_HOUR
-#define RTC_DOW DS1511_DOW
-#define RTC_DOM DS1511_DOM
-#define RTC_MON DS1511_MONTH
-#define RTC_YEAR DS1511_YEAR
-#define RTC_CENTURY DS1511_CENTURY
-
-#define RTC_TIE DS1511_TIE
-#define RTC_TE DS1511_TE
-
-struct rtc_plat_data {
+struct ds1511_data {
struct rtc_device *rtc;
void __iomem *ioaddr; /* virtual base address */
int irq;
- unsigned int irqen;
- int alrm_sec;
- int alrm_min;
- int alrm_hour;
- int alrm_mday;
spinlock_t lock;
};
static __iomem char *ds1511_base;
static u32 reg_spacing = 1;
-static noinline void
-rtc_write(uint8_t val, uint32_t reg)
+static void rtc_write(uint8_t val, uint32_t reg)
{
writeb(val, ds1511_base + (reg * reg_spacing));
}
-static noinline uint8_t
-rtc_read(enum ds1511reg reg)
+static uint8_t rtc_read(uint32_t reg)
{
return readb(ds1511_base + (reg * reg_spacing));
}
-static inline void
-rtc_disable_update(void)
+static void rtc_disable_update(void)
{
- rtc_write((rtc_read(RTC_CMD) & ~RTC_TE), RTC_CMD);
+ rtc_write((rtc_read(DS1511_CONTROL_B) & ~DS1511_TE), DS1511_CONTROL_B);
}
-static void
-rtc_enable_update(void)
+static void rtc_enable_update(void)
{
- rtc_write((rtc_read(RTC_CMD) | RTC_TE), RTC_CMD);
+ rtc_write((rtc_read(DS1511_CONTROL_B) | DS1511_TE), DS1511_CONTROL_B);
}
static int ds1511_rtc_set_time(struct device *dev, struct rtc_time *rtc_tm)
spin_lock_irqsave(&ds1511_lock, flags);
rtc_disable_update();
- rtc_write(cen, RTC_CENTURY);
- rtc_write(yrs, RTC_YEAR);
- rtc_write((rtc_read(RTC_MON) & 0xe0) | mon, RTC_MON);
- rtc_write(day, RTC_DOM);
- rtc_write(hrs, RTC_HOUR);
- rtc_write(min, RTC_MIN);
- rtc_write(sec, RTC_SEC);
- rtc_write(dow, RTC_DOW);
+ rtc_write(cen, DS1511_CENTURY);
+ rtc_write(yrs, DS1511_YEAR);
+ rtc_write((rtc_read(DS1511_MONTH) & 0xe0) | mon, DS1511_MONTH);
+ rtc_write(day, DS1511_DOM);
+ rtc_write(hrs, DS1511_HOUR);
+ rtc_write(min, DS1511_MIN);
+ rtc_write(sec, DS1511_SEC);
+ rtc_write(dow, DS1511_DOW);
rtc_enable_update();
spin_unlock_irqrestore(&ds1511_lock, flags);
spin_lock_irqsave(&ds1511_lock, flags);
rtc_disable_update();
- rtc_tm->tm_sec = rtc_read(RTC_SEC) & 0x7f;
- rtc_tm->tm_min = rtc_read(RTC_MIN) & 0x7f;
- rtc_tm->tm_hour = rtc_read(RTC_HOUR) & 0x3f;
- rtc_tm->tm_mday = rtc_read(RTC_DOM) & 0x3f;
- rtc_tm->tm_wday = rtc_read(RTC_DOW) & 0x7;
- rtc_tm->tm_mon = rtc_read(RTC_MON) & 0x1f;
- rtc_tm->tm_year = rtc_read(RTC_YEAR) & 0x7f;
- century = rtc_read(RTC_CENTURY);
+ rtc_tm->tm_sec = rtc_read(DS1511_SEC) & 0x7f;
+ rtc_tm->tm_min = rtc_read(DS1511_MIN) & 0x7f;
+ rtc_tm->tm_hour = rtc_read(DS1511_HOUR) & 0x3f;
+ rtc_tm->tm_mday = rtc_read(DS1511_DOM) & 0x3f;
+ rtc_tm->tm_wday = rtc_read(DS1511_DOW) & 0x7;
+ rtc_tm->tm_mon = rtc_read(DS1511_MONTH) & 0x1f;
+ rtc_tm->tm_year = rtc_read(DS1511_YEAR) & 0x7f;
+ century = rtc_read(DS1511_CENTURY);
rtc_enable_update();
spin_unlock_irqrestore(&ds1511_lock, flags);
return 0;
}
-/*
- * write the alarm register settings
- *
- * we only have the use to interrupt every second, otherwise
- * known as the update interrupt, or the interrupt if the whole
- * date/hours/mins/secs matches. the ds1511 has many more
- * permutations, but the kernel doesn't.
- */
-static void
-ds1511_rtc_update_alarm(struct rtc_plat_data *pdata)
+static void ds1511_rtc_alarm_enable(unsigned int enabled)
{
- unsigned long flags;
-
- spin_lock_irqsave(&pdata->lock, flags);
- rtc_write(pdata->alrm_mday < 0 || (pdata->irqen & RTC_UF) ?
- 0x80 : bin2bcd(pdata->alrm_mday) & 0x3f,
- RTC_ALARM_DATE);
- rtc_write(pdata->alrm_hour < 0 || (pdata->irqen & RTC_UF) ?
- 0x80 : bin2bcd(pdata->alrm_hour) & 0x3f,
- RTC_ALARM_HOUR);
- rtc_write(pdata->alrm_min < 0 || (pdata->irqen & RTC_UF) ?
- 0x80 : bin2bcd(pdata->alrm_min) & 0x7f,
- RTC_ALARM_MIN);
- rtc_write(pdata->alrm_sec < 0 || (pdata->irqen & RTC_UF) ?
- 0x80 : bin2bcd(pdata->alrm_sec) & 0x7f,
- RTC_ALARM_SEC);
- rtc_write(rtc_read(RTC_CMD) | (pdata->irqen ? RTC_TIE : 0), RTC_CMD);
- rtc_read(RTC_CMD1); /* clear interrupts */
- spin_unlock_irqrestore(&pdata->lock, flags);
+ rtc_write(rtc_read(DS1511_CONTROL_B) | (enabled ? DS1511_TIE : 0), DS1511_CONTROL_B);
}
-static int
-ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
- struct rtc_plat_data *pdata = dev_get_drvdata(dev);
+ struct ds1511_data *ds1511 = dev_get_drvdata(dev);
+ unsigned long flags;
- if (pdata->irq <= 0)
- return -EINVAL;
+ spin_lock_irqsave(&ds1511->lock, flags);
+ rtc_write(bin2bcd(alrm->time.tm_mday) & 0x3f, DS1511_AM4_DATE);
+ rtc_write(bin2bcd(alrm->time.tm_hour) & 0x3f, DS1511_AM3_HOUR);
+ rtc_write(bin2bcd(alrm->time.tm_min) & 0x7f, DS1511_AM2_MIN);
+ rtc_write(bin2bcd(alrm->time.tm_sec) & 0x7f, DS1511_AM1_SEC);
+ ds1511_rtc_alarm_enable(alrm->enabled);
- pdata->alrm_mday = alrm->time.tm_mday;
- pdata->alrm_hour = alrm->time.tm_hour;
- pdata->alrm_min = alrm->time.tm_min;
- pdata->alrm_sec = alrm->time.tm_sec;
- if (alrm->enabled)
- pdata->irqen |= RTC_AF;
+ rtc_read(DS1511_CONTROL_A); /* clear interrupts */
+ spin_unlock_irqrestore(&ds1511->lock, flags);
- ds1511_rtc_update_alarm(pdata);
return 0;
}
-static int
-ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+static int ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
- struct rtc_plat_data *pdata = dev_get_drvdata(dev);
-
- if (pdata->irq <= 0)
- return -EINVAL;
+ alrm->time.tm_mday = bcd2bin(rtc_read(DS1511_AM4_DATE) & 0x3f);
+ alrm->time.tm_hour = bcd2bin(rtc_read(DS1511_AM3_HOUR) & 0x3f);
+ alrm->time.tm_min = bcd2bin(rtc_read(DS1511_AM2_MIN) & 0x7f);
+ alrm->time.tm_sec = bcd2bin(rtc_read(DS1511_AM1_SEC) & 0x7f);
+ alrm->enabled = !!(rtc_read(DS1511_CONTROL_B) & DS1511_TIE);
- alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
- alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
- alrm->time.tm_min = pdata->alrm_min < 0 ? 0 : pdata->alrm_min;
- alrm->time.tm_sec = pdata->alrm_sec < 0 ? 0 : pdata->alrm_sec;
- alrm->enabled = (pdata->irqen & RTC_AF) ? 1 : 0;
return 0;
}
-static irqreturn_t
-ds1511_interrupt(int irq, void *dev_id)
+static irqreturn_t ds1511_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
+ struct ds1511_data *ds1511 = platform_get_drvdata(pdev);
unsigned long events = 0;
- spin_lock(&pdata->lock);
+ spin_lock(&ds1511->lock);
/*
* read and clear interrupt
*/
- if (rtc_read(RTC_CMD1) & DS1511_IRQF) {
- events = RTC_IRQF;
- if (rtc_read(RTC_ALARM_SEC) & 0x80)
- events |= RTC_UF;
- else
- events |= RTC_AF;
- rtc_update_irq(pdata->rtc, 1, events);
+ if (rtc_read(DS1511_CONTROL_A) & DS1511_IRQF) {
+ events = RTC_IRQF | RTC_AF;
+ rtc_update_irq(ds1511->rtc, 1, events);
}
- spin_unlock(&pdata->lock);
+ spin_unlock(&ds1511->lock);
return events ? IRQ_HANDLED : IRQ_NONE;
}
static int ds1511_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
- struct rtc_plat_data *pdata = dev_get_drvdata(dev);
-
- if (pdata->irq <= 0)
- return -EINVAL;
- if (enabled)
- pdata->irqen |= RTC_AF;
- else
- pdata->irqen &= ~RTC_AF;
- ds1511_rtc_update_alarm(pdata);
+ struct ds1511_data *ds1511 = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ds1511->lock, flags);
+ ds1511_rtc_alarm_enable(enabled);
+ spin_unlock_irqrestore(&ds1511->lock, flags);
+
return 0;
}
static int ds1511_rtc_probe(struct platform_device *pdev)
{
- struct rtc_plat_data *pdata;
+ struct ds1511_data *ds1511;
int ret = 0;
struct nvmem_config ds1511_nvmem_cfg = {
.name = "ds1511_nvram",
.priv = &pdev->dev,
};
- pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
+ ds1511 = devm_kzalloc(&pdev->dev, sizeof(*ds1511), GFP_KERNEL);
+ if (!ds1511)
return -ENOMEM;
ds1511_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ds1511_base))
return PTR_ERR(ds1511_base);
- pdata->ioaddr = ds1511_base;
- pdata->irq = platform_get_irq(pdev, 0);
+ ds1511->ioaddr = ds1511_base;
+ ds1511->irq = platform_get_irq(pdev, 0);
/*
* turn on the clock and the crystal, etc.
*/
- rtc_write(DS1511_BME, RTC_CMD);
- rtc_write(0, RTC_CMD1);
+ rtc_write(DS1511_BME, DS1511_CONTROL_B);
+ rtc_write(0, DS1511_CONTROL_A);
/*
* clear the wdog counter
*/
/*
* check for a dying bat-tree
*/
- if (rtc_read(RTC_CMD1) & DS1511_BLF1)
+ if (rtc_read(DS1511_CONTROL_A) & DS1511_BLF1)
dev_warn(&pdev->dev, "voltage-low detected.\n");
- spin_lock_init(&pdata->lock);
- platform_set_drvdata(pdev, pdata);
+ spin_lock_init(&ds1511->lock);
+ platform_set_drvdata(pdev, ds1511);
- pdata->rtc = devm_rtc_allocate_device(&pdev->dev);
- if (IS_ERR(pdata->rtc))
- return PTR_ERR(pdata->rtc);
-
- pdata->rtc->ops = &ds1511_rtc_ops;
-
- ret = devm_rtc_register_device(pdata->rtc);
- if (ret)
- return ret;
+ ds1511->rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(ds1511->rtc))
+ return PTR_ERR(ds1511->rtc);
- devm_rtc_nvmem_register(pdata->rtc, &ds1511_nvmem_cfg);
+ ds1511->rtc->ops = &ds1511_rtc_ops;
+ ds1511->rtc->range_max = RTC_TIMESTAMP_END_2099;
+ ds1511->rtc->alarm_offset_max = 28 * 24 * 60 * 60 - 1;
/*
* if the platform has an interrupt in mind for this device,
* then by all means, set it
*/
- if (pdata->irq > 0) {
- rtc_read(RTC_CMD1);
- if (devm_request_irq(&pdev->dev, pdata->irq, ds1511_interrupt,
+ if (ds1511->irq > 0) {
+ rtc_read(DS1511_CONTROL_A);
+ if (devm_request_irq(&pdev->dev, ds1511->irq, ds1511_interrupt,
IRQF_SHARED, pdev->name, pdev) < 0) {
dev_warn(&pdev->dev, "interrupt not available.\n");
- pdata->irq = 0;
+ ds1511->irq = 0;
}
}
+ if (ds1511->irq == 0)
+ clear_bit(RTC_FEATURE_ALARM, ds1511->rtc->features);
+
+ ret = devm_rtc_register_device(ds1511->rtc);
+ if (ret)
+ return ret;
+
+ devm_rtc_nvmem_register(ds1511->rtc, &ds1511_nvmem_cfg);
+
return 0;
}
projects / linux-2.6-microblaze.git / blobdiff