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path: root/drivers/rtc/rtc-m48t59.c
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Diffstat (limited to 'drivers/rtc/rtc-m48t59.c')
-rw-r--r--drivers/rtc/rtc-m48t59.c117
1 files changed, 76 insertions, 41 deletions
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index 013e6c103b9c..04b63dab6932 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -24,8 +24,9 @@
#define NO_IRQ (-1)
#endif
-#define M48T59_READ(reg) pdata->read_byte(dev, reg)
-#define M48T59_WRITE(val, reg) pdata->write_byte(dev, reg, val)
+#define M48T59_READ(reg) (pdata->read_byte(dev, pdata->offset + reg))
+#define M48T59_WRITE(val, reg) \
+ (pdata->write_byte(dev, pdata->offset + reg, val))
#define M48T59_SET_BITS(mask, reg) \
M48T59_WRITE((M48T59_READ(reg) | (mask)), (reg))
@@ -34,7 +35,6 @@
struct m48t59_private {
void __iomem *ioaddr;
- unsigned int size; /* iomem size */
int irq;
struct rtc_device *rtc;
spinlock_t lock; /* serialize the NVRAM and RTC access */
@@ -76,21 +76,22 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
/* Issue the READ command */
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
- tm->tm_year = BCD2BIN(M48T59_READ(M48T59_YEAR));
+ tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
/* tm_mon is 0-11 */
- tm->tm_mon = BCD2BIN(M48T59_READ(M48T59_MONTH)) - 1;
- tm->tm_mday = BCD2BIN(M48T59_READ(M48T59_MDAY));
+ tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
+ tm->tm_mday = bcd2bin(M48T59_READ(M48T59_MDAY));
val = M48T59_READ(M48T59_WDAY);
- if ((val & M48T59_WDAY_CEB) && (val & M48T59_WDAY_CB)) {
+ if ((pdata->type == M48T59RTC_TYPE_M48T59) &&
+ (val & M48T59_WDAY_CEB) && (val & M48T59_WDAY_CB)) {
dev_dbg(dev, "Century bit is enabled\n");
tm->tm_year += 100; /* one century */
}
- tm->tm_wday = BCD2BIN(val & 0x07);
- tm->tm_hour = BCD2BIN(M48T59_READ(M48T59_HOUR) & 0x3F);
- tm->tm_min = BCD2BIN(M48T59_READ(M48T59_MIN) & 0x7F);
- tm->tm_sec = BCD2BIN(M48T59_READ(M48T59_SEC) & 0x7F);
+ tm->tm_wday = bcd2bin(val & 0x07);
+ tm->tm_hour = bcd2bin(M48T59_READ(M48T59_HOUR) & 0x3F);
+ tm->tm_min = bcd2bin(M48T59_READ(M48T59_MIN) & 0x7F);
+ tm->tm_sec = bcd2bin(M48T59_READ(M48T59_SEC) & 0x7F);
/* Clear the READ bit */
M48T59_CLEAR_BITS(M48T59_CNTL_READ, M48T59_CNTL);
@@ -118,17 +119,17 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
/* Issue the WRITE command */
M48T59_SET_BITS(M48T59_CNTL_WRITE, M48T59_CNTL);
- M48T59_WRITE((BIN2BCD(tm->tm_sec) & 0x7F), M48T59_SEC);
- M48T59_WRITE((BIN2BCD(tm->tm_min) & 0x7F), M48T59_MIN);
- M48T59_WRITE((BIN2BCD(tm->tm_hour) & 0x3F), M48T59_HOUR);
- M48T59_WRITE((BIN2BCD(tm->tm_mday) & 0x3F), M48T59_MDAY);
+ M48T59_WRITE((bin2bcd(tm->tm_sec) & 0x7F), M48T59_SEC);
+ M48T59_WRITE((bin2bcd(tm->tm_min) & 0x7F), M48T59_MIN);
+ M48T59_WRITE((bin2bcd(tm->tm_hour) & 0x3F), M48T59_HOUR);
+ M48T59_WRITE((bin2bcd(tm->tm_mday) & 0x3F), M48T59_MDAY);
/* tm_mon is 0-11 */
- M48T59_WRITE((BIN2BCD(tm->tm_mon + 1) & 0x1F), M48T59_MONTH);
- M48T59_WRITE(BIN2BCD(tm->tm_year % 100), M48T59_YEAR);
+ M48T59_WRITE((bin2bcd(tm->tm_mon + 1) & 0x1F), M48T59_MONTH);
+ M48T59_WRITE(bin2bcd(tm->tm_year % 100), M48T59_YEAR);
- if (tm->tm_year/100)
+ if (pdata->type == M48T59RTC_TYPE_M48T59 && (tm->tm_year / 100))
val = (M48T59_WDAY_CEB | M48T59_WDAY_CB);
- val |= (BIN2BCD(tm->tm_wday) & 0x07);
+ val |= (bin2bcd(tm->tm_wday) & 0x07);
M48T59_WRITE(val, M48T59_WDAY);
/* Clear the WRITE bit */
@@ -157,18 +158,18 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
/* Issue the READ command */
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
- tm->tm_year = BCD2BIN(M48T59_READ(M48T59_YEAR));
+ tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
/* tm_mon is 0-11 */
- tm->tm_mon = BCD2BIN(M48T59_READ(M48T59_MONTH)) - 1;
+ tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
val = M48T59_READ(M48T59_WDAY);
if ((val & M48T59_WDAY_CEB) && (val & M48T59_WDAY_CB))
tm->tm_year += 100; /* one century */
- tm->tm_mday = BCD2BIN(M48T59_READ(M48T59_ALARM_DATE));
- tm->tm_hour = BCD2BIN(M48T59_READ(M48T59_ALARM_HOUR));
- tm->tm_min = BCD2BIN(M48T59_READ(M48T59_ALARM_MIN));
- tm->tm_sec = BCD2BIN(M48T59_READ(M48T59_ALARM_SEC));
+ tm->tm_mday = bcd2bin(M48T59_READ(M48T59_ALARM_DATE));
+ tm->tm_hour = bcd2bin(M48T59_READ(M48T59_ALARM_HOUR));
+ tm->tm_min = bcd2bin(M48T59_READ(M48T59_ALARM_MIN));
+ tm->tm_sec = bcd2bin(M48T59_READ(M48T59_ALARM_SEC));
/* Clear the READ bit */
M48T59_CLEAR_BITS(M48T59_CNTL_READ, M48T59_CNTL);
@@ -200,18 +201,18 @@ static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
* 0xff means "always match"
*/
mday = tm->tm_mday;
- mday = (mday >= 1 && mday <= 31) ? BIN2BCD(mday) : 0xff;
+ mday = (mday >= 1 && mday <= 31) ? bin2bcd(mday) : 0xff;
if (mday == 0xff)
mday = M48T59_READ(M48T59_MDAY);
hour = tm->tm_hour;
- hour = (hour < 24) ? BIN2BCD(hour) : 0x00;
+ hour = (hour < 24) ? bin2bcd(hour) : 0x00;
min = tm->tm_min;
- min = (min < 60) ? BIN2BCD(min) : 0x00;
+ min = (min < 60) ? bin2bcd(min) : 0x00;
sec = tm->tm_sec;
- sec = (sec < 60) ? BIN2BCD(sec) : 0x00;
+ sec = (sec < 60) ? bin2bcd(sec) : 0x00;
spin_lock_irqsave(&m48t59->lock, flags);
/* Issue the WRITE command */
@@ -310,6 +311,11 @@ static const struct rtc_class_ops m48t59_rtc_ops = {
.proc = m48t59_rtc_proc,
};
+static const struct rtc_class_ops m48t02_rtc_ops = {
+ .read_time = m48t59_rtc_read_time,
+ .set_time = m48t59_rtc_set_time,
+};
+
static ssize_t m48t59_nvram_read(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
@@ -321,7 +327,7 @@ static ssize_t m48t59_nvram_read(struct kobject *kobj,
ssize_t cnt = 0;
unsigned long flags;
- for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) {
+ for (; size > 0 && pos < pdata->offset; cnt++, size--) {
spin_lock_irqsave(&m48t59->lock, flags);
*buf++ = M48T59_READ(cnt);
spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -341,7 +347,7 @@ static ssize_t m48t59_nvram_write(struct kobject *kobj,
ssize_t cnt = 0;
unsigned long flags;
- for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) {
+ for (; size > 0 && pos < pdata->offset; cnt++, size--) {
spin_lock_irqsave(&m48t59->lock, flags);
M48T59_WRITE(*buf++, cnt);
spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -354,11 +360,9 @@ static struct bin_attribute m48t59_nvram_attr = {
.attr = {
.name = "nvram",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.read = m48t59_nvram_read,
.write = m48t59_nvram_write,
- .size = M48T59_NVRAM_SIZE,
};
static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
@@ -367,6 +371,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
struct m48t59_private *m48t59 = NULL;
struct resource *res;
int ret = -ENOMEM;
+ char *name;
+ const struct rtc_class_ops *ops;
/* This chip could be memory-mapped or I/O-mapped */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -391,6 +397,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
/* Ensure we only kmalloc platform data once */
pdev->dev.platform_data = pdata;
}
+ if (!pdata->type)
+ pdata->type = M48T59RTC_TYPE_M48T59;
/* Try to use the generic memory read/write ops */
if (!pdata->write_byte)
@@ -403,10 +411,14 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
if (!m48t59)
return -ENOMEM;
- m48t59->size = res->end - res->start + 1;
- m48t59->ioaddr = ioremap(res->start, m48t59->size);
- if (!m48t59->ioaddr)
- goto out;
+ m48t59->ioaddr = pdata->ioaddr;
+
+ if (!m48t59->ioaddr) {
+ /* ioaddr not mapped externally */
+ m48t59->ioaddr = ioremap(res->start, res->end - res->start + 1);
+ if (!m48t59->ioaddr)
+ goto out;
+ }
/* Try to get irq number. We also can work in
* the mode without IRQ.
@@ -421,14 +433,36 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
if (ret)
goto out;
}
+ switch (pdata->type) {
+ case M48T59RTC_TYPE_M48T59:
+ name = "m48t59";
+ ops = &m48t59_rtc_ops;
+ pdata->offset = 0x1ff0;
+ break;
+ case M48T59RTC_TYPE_M48T02:
+ name = "m48t02";
+ ops = &m48t02_rtc_ops;
+ pdata->offset = 0x7f0;
+ break;
+ case M48T59RTC_TYPE_M48T08:
+ name = "m48t08";
+ ops = &m48t02_rtc_ops;
+ pdata->offset = 0x1ff0;
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown RTC type\n");
+ ret = -ENODEV;
+ goto out;
+ }
- m48t59->rtc = rtc_device_register("m48t59", &pdev->dev,
- &m48t59_rtc_ops, THIS_MODULE);
+ m48t59->rtc = rtc_device_register(name, &pdev->dev, ops, THIS_MODULE);
if (IS_ERR(m48t59->rtc)) {
ret = PTR_ERR(m48t59->rtc);
goto out;
}
+ m48t59_nvram_attr.size = pdata->offset;
+
ret = sysfs_create_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
if (ret)
goto out;
@@ -452,11 +486,12 @@ out:
static int __devexit m48t59_rtc_remove(struct platform_device *pdev)
{
struct m48t59_private *m48t59 = platform_get_drvdata(pdev);
+ struct m48t59_plat_data *pdata = pdev->dev.platform_data;
sysfs_remove_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
if (!IS_ERR(m48t59->rtc))
rtc_device_unregister(m48t59->rtc);
- if (m48t59->ioaddr)
+ if (m48t59->ioaddr && !pdata->ioaddr)
iounmap(m48t59->ioaddr);
if (m48t59->irq != NO_IRQ)
free_irq(m48t59->irq, &pdev->dev);
@@ -491,5 +526,5 @@ module_init(m48t59_rtc_init);
module_exit(m48t59_rtc_exit);
MODULE_AUTHOR("Mark Zhan <rongkai.zhan@windriver.com>");
-MODULE_DESCRIPTION("M48T59 RTC driver");
+MODULE_DESCRIPTION("M48T59/M48T02/M48T08 RTC driver");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 18:57:12 +0100