*
* Copyright (C) 2005 James Chapman (ds1337 core)
* Copyright (C) 2006 David Brownell
+ * Copyright (C) 2009 Matthias Fuchs (rx8025 support)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
ds_1338,
ds_1339,
ds_1340,
+ ds_1388,
+ ds_3231,
m41t00,
+ rx_8025,
// rs5c372 too? different address...
};
#define DS1337_REG_CONTROL 0x0e
# define DS1337_BIT_nEOSC 0x80
# define DS1339_BIT_BBSQI 0x20
+# define DS3231_BIT_BBSQW 0x40 /* same as BBSQI */
# define DS1337_BIT_RS2 0x10
# define DS1337_BIT_RS1 0x08
# define DS1337_BIT_INTCN 0x04
#define DS1339_REG_ALARM1_SECS 0x07
#define DS1339_REG_TRICKLE 0x10
+#define RX8025_REG_CTRL1 0x0e
+# define RX8025_BIT_2412 0x20
+#define RX8025_REG_CTRL2 0x0f
+# define RX8025_BIT_PON 0x10
+# define RX8025_BIT_VDET 0x40
+# define RX8025_BIT_XST 0x20
struct ds1307 {
+ u8 offset; /* register's offset */
u8 regs[11];
enum ds_type type;
unsigned long flags;
},
[ds_1340] = {
},
+[ds_3231] = {
+ .alarm = 1,
+},
[m41t00] = {
+},
+[rx_8025] = {
}, };
static const struct i2c_device_id ds1307_id[] = {
{ "ds1337", ds_1337 },
{ "ds1338", ds_1338 },
{ "ds1339", ds_1339 },
+ { "ds1388", ds_1388 },
{ "ds1340", ds_1340 },
+ { "ds3231", ds_3231 },
{ "m41t00", m41t00 },
+ { "rx8025", rx_8025 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ds1307_id);
control &= ~DS1337_BIT_A1IE;
i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
- /* rtc_update_irq() assumes that it is called
- * from IRQ-disabled context.
- */
- local_irq_disable();
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
- local_irq_enable();
}
out:
/* read the RTC date and time registers all at once */
tmp = ds1307->read_block_data(ds1307->client,
- DS1307_REG_SECS, 7, ds1307->regs);
+ ds1307->offset, 7, ds1307->regs);
if (tmp != 7) {
dev_err(dev, "%s error %d\n", "read", tmp);
return -EIO;
switch (ds1307->type) {
case ds_1337:
case ds_1339:
+ case ds_3231:
buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY;
break;
case ds_1340:
"write", buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6]);
- result = ds1307->write_block_data(ds1307->client, 0, 7, buf);
+ result = ds1307->write_block_data(ds1307->client,
+ ds1307->offset, 7, buf);
if (result < 0) {
dev_err(dev, "%s error %d\n", "write", result);
return result;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
int want_irq = false;
unsigned char *buf;
+ static const int bbsqi_bitpos[] = {
+ [ds_1337] = 0,
+ [ds_1339] = DS1339_BIT_BBSQI,
+ [ds_3231] = DS3231_BIT_BBSQW,
+ };
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)
&& !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL)))
return -ENOMEM;
- ds1307->client = client;
i2c_set_clientdata(client, ds1307);
- ds1307->type = id->driver_data;
+
+ ds1307->client = client;
+ ds1307->type = id->driver_data;
+ ds1307->offset = 0;
+
buf = ds1307->regs;
if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
ds1307->read_block_data = i2c_smbus_read_i2c_block_data;
switch (ds1307->type) {
case ds_1337:
case ds_1339:
+ case ds_3231:
/* has IRQ? */
if (ds1307->client->irq > 0 && chip->alarm) {
INIT_WORK(&ds1307->work, ds1307_work);
ds1307->regs[0] &= ~DS1337_BIT_nEOSC;
/* Using IRQ? Disable the square wave and both alarms.
- * For ds1339, be sure alarms can trigger when we're
- * running on Vbackup (BBSQI); we assume ds1337 will
- * ignore that bit
+ * For some variants, be sure alarms can trigger when we're
+ * running on Vbackup (BBSQI/BBSQW)
*/
if (want_irq) {
- ds1307->regs[0] |= DS1337_BIT_INTCN | DS1339_BIT_BBSQI;
+ ds1307->regs[0] |= DS1337_BIT_INTCN
+ | bbsqi_bitpos[ds1307->type];
ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
}
dev_warn(&client->dev, "SET TIME!\n");
}
break;
+
+ case rx_8025:
+ tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
+ RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
+ if (tmp != 2) {
+ pr_debug("read error %d\n", tmp);
+ err = -EIO;
+ goto exit_free;
+ }
+
+ /* oscillator off? turn it on, so clock can tick. */
+ if (!(ds1307->regs[1] & RX8025_BIT_XST)) {
+ ds1307->regs[1] |= RX8025_BIT_XST;
+ i2c_smbus_write_byte_data(client,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(&client->dev,
+ "oscillator stop detected - SET TIME!\n");
+ }
+
+ if (ds1307->regs[1] & RX8025_BIT_PON) {
+ ds1307->regs[1] &= ~RX8025_BIT_PON;
+ i2c_smbus_write_byte_data(client,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(&client->dev, "power-on detected\n");
+ }
+
+ if (ds1307->regs[1] & RX8025_BIT_VDET) {
+ ds1307->regs[1] &= ~RX8025_BIT_VDET;
+ i2c_smbus_write_byte_data(client,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(&client->dev, "voltage drop detected\n");
+ }
+
+ /* make sure we are running in 24hour mode */
+ if (!(ds1307->regs[0] & RX8025_BIT_2412)) {
+ u8 hour;
+
+ /* switch to 24 hour mode */
+ i2c_smbus_write_byte_data(client,
+ RX8025_REG_CTRL1 << 4 | 0x08,
+ ds1307->regs[0] |
+ RX8025_BIT_2412);
+
+ tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
+ RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
+ if (tmp != 2) {
+ pr_debug("read error %d\n", tmp);
+ err = -EIO;
+ goto exit_free;
+ }
+
+ /* correct hour */
+ hour = bcd2bin(ds1307->regs[DS1307_REG_HOUR]);
+ if (hour == 12)
+ hour = 0;
+ if (ds1307->regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
+ hour += 12;
+
+ i2c_smbus_write_byte_data(client,
+ DS1307_REG_HOUR << 4 | 0x08,
+ hour);
+ }
+ break;
+ case ds_1388:
+ ds1307->offset = 1; /* Seconds starts at 1 */
+ break;
default:
break;
}
dev_warn(&client->dev, "SET TIME!\n");
}
break;
+ case rx_8025:
case ds_1337:
case ds_1339:
+ case ds_1388:
+ case ds_3231:
break;
}
* systems that will run through year 2100.
*/
break;
+ case rx_8025:
+ break;
default:
if (!(tmp & DS1307_BIT_12HR))
break;
}
if (want_irq) {
- err = request_irq(client->irq, ds1307_irq, 0,
+ err = request_irq(client->irq, ds1307_irq, IRQF_SHARED,
ds1307->rtc->name, client);
if (err) {
dev_err(&client->dev,
"unable to request IRQ!\n");
goto exit_irq;
}
+
+ device_set_wakeup_capable(&client->dev, 1);
set_bit(HAS_ALARM, &ds1307->flags);
dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
}
return 0;
exit_irq:
- if (ds1307->rtc)
- rtc_device_unregister(ds1307->rtc);
+ rtc_device_unregister(ds1307->rtc);
exit_free:
kfree(ds1307);
return err;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff