X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Frtc%2Frtc-x1205.c;h=7dcfba1bbfe131539af2aba38d361e53d036280e;hb=bb93d802ae5c1949977cc6da247b218240677f11;hp=b90fb1866ce98735eb329c7a266dd32e902b4ee3;hpb=922539a0a3c44e3b8dcf1025910f08e1940ba49f;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c index b90fb18..7dcfba1 100644 --- a/drivers/rtc/rtc-x1205.c +++ b/drivers/rtc/rtc-x1205.c @@ -22,20 +22,7 @@ #include #include -#define DRV_VERSION "1.0.7" - -/* Addresses to scan: none. This chip is located at - * 0x6f and uses a two bytes register addressing. - * Two bytes need to be written to read a single register, - * while most other chips just require one and take the second - * one as the data to be written. To prevent corrupting - * unknown chips, the user must explicitly set the probe parameter. - */ - -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD; +#define DRV_VERSION "1.0.8" /* offsets into CCR area */ @@ -84,6 +71,7 @@ I2C_CLIENT_INSMOD; #define X1205_SR_RTCF 0x01 /* Clock failure */ #define X1205_SR_WEL 0x02 /* Write Enable Latch */ #define X1205_SR_RWEL 0x04 /* Register Write Enable */ +#define X1205_SR_AL0 0x20 /* Alarm 0 match */ #define X1205_DTR_DTR0 0x01 #define X1205_DTR_DTR1 0x02 @@ -91,19 +79,9 @@ I2C_CLIENT_INSMOD; #define X1205_HR_MIL 0x80 /* Set in ccr.hour for 24 hr mode */ -/* Prototypes */ -static int x1205_attach(struct i2c_adapter *adapter); -static int x1205_detach(struct i2c_client *client); -static int x1205_probe(struct i2c_adapter *adapter, int address, int kind); +#define X1205_INT_AL0E 0x20 /* Alarm 0 enable */ -static struct i2c_driver x1205_driver = { - .driver = { - .name = "x1205", - }, - .id = I2C_DRIVERID_X1205, - .attach_adapter = &x1205_attach, - .detach_client = &x1205_detach, -}; +static struct i2c_driver x1205_driver; /* * In the routines that deal directly with the x1205 hardware, we use @@ -114,8 +92,8 @@ static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, unsigned char reg_base) { unsigned char dt_addr[2] = { 0, reg_base }; - unsigned char buf[8]; + int i; struct i2c_msg msgs[] = { { client->addr, 0, 2, dt_addr }, /* setup read ptr */ @@ -123,18 +101,23 @@ static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, }; /* read date registers */ - if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); + if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); return -EIO; } dev_dbg(&client->dev, "%s: raw read data - sec=%02x, min=%02x, hr=%02x, " "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n", - __FUNCTION__, + __func__, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); + /* Mask out the enable bits if these are alarm registers */ + if (reg_base < X1205_CCR_BASE) + for (i = 0; i <= 4; i++) + buf[i] &= 0x7F; + tm->tm_sec = BCD2BIN(buf[CCR_SEC]); tm->tm_min = BCD2BIN(buf[CCR_MIN]); tm->tm_hour = BCD2BIN(buf[CCR_HOUR] & 0x3F); /* hr is 0-23 */ @@ -146,7 +129,7 @@ static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, dev_dbg(&client->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); @@ -163,8 +146,8 @@ static int x1205_get_status(struct i2c_client *client, unsigned char *sr) }; /* read status register */ - if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); + if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); return -EIO; } @@ -172,10 +155,11 @@ static int x1205_get_status(struct i2c_client *client, unsigned char *sr) } static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, - int datetoo, u8 reg_base) + int datetoo, u8 reg_base, unsigned char alm_enable) { - int i, xfer; + int i, xfer, nbytes; unsigned char buf[8]; + unsigned char rdata[10] = { 0, reg_base }; static const unsigned char wel[3] = { 0, X1205_REG_SR, X1205_SR_WEL }; @@ -187,7 +171,7 @@ static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d\n", - __FUNCTION__, + __func__, tm->tm_sec, tm->tm_min, tm->tm_hour); buf[CCR_SEC] = BIN2BCD(tm->tm_sec); @@ -200,7 +184,7 @@ static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, if (datetoo) { dev_dbg(&client->dev, "%s: mday=%d, mon=%d, year=%d, wday=%d\n", - __FUNCTION__, + __func__, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); buf[CCR_MDAY] = BIN2BCD(tm->tm_mday); @@ -214,34 +198,77 @@ static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, buf[CCR_Y2K] = BIN2BCD(tm->tm_year / 100); } + /* If writing alarm registers, set compare bits on registers 0-4 */ + if (reg_base < X1205_CCR_BASE) + for (i = 0; i <= 4; i++) + buf[i] |= 0x80; + /* this sequence is required to unlock the chip */ if ((xfer = i2c_master_send(client, wel, 3)) != 3) { - dev_err(&client->dev, "%s: wel - %d\n", __FUNCTION__, xfer); + dev_err(&client->dev, "%s: wel - %d\n", __func__, xfer); return -EIO; } if ((xfer = i2c_master_send(client, rwel, 3)) != 3) { - dev_err(&client->dev, "%s: rwel - %d\n", __FUNCTION__, xfer); + dev_err(&client->dev, "%s: rwel - %d\n", __func__, xfer); return -EIO; } + /* write register's data */ - for (i = 0; i < (datetoo ? 8 : 3); i++) { - unsigned char rdata[3] = { 0, reg_base + i, buf[i] }; + if (datetoo) + nbytes = 8; + else + nbytes = 3; + for (i = 0; i < nbytes; i++) + rdata[2+i] = buf[i]; + + xfer = i2c_master_send(client, rdata, nbytes+2); + if (xfer != nbytes+2) { + dev_err(&client->dev, + "%s: result=%d addr=%02x, data=%02x\n", + __func__, + xfer, rdata[1], rdata[2]); + return -EIO; + } + + /* If we wrote to the nonvolatile region, wait 10msec for write cycle*/ + if (reg_base < X1205_CCR_BASE) { + unsigned char al0e[3] = { 0, X1205_REG_INT, 0 }; + + msleep(10); + + /* ...and set or clear the AL0E bit in the INT register */ - xfer = i2c_master_send(client, rdata, 3); + /* Need to set RWEL again as the write has cleared it */ + xfer = i2c_master_send(client, rwel, 3); if (xfer != 3) { dev_err(&client->dev, - "%s: xfer=%d addr=%02x, data=%02x\n", - __FUNCTION__, - xfer, rdata[1], rdata[2]); + "%s: aloe rwel - %d\n", + __func__, + xfer); + return -EIO; + } + + if (alm_enable) + al0e[2] = X1205_INT_AL0E; + + xfer = i2c_master_send(client, al0e, 3); + if (xfer != 3) { + dev_err(&client->dev, + "%s: al0e - %d\n", + __func__, + xfer); return -EIO; } - }; + + /* and wait 10msec again for this write to complete */ + msleep(10); + } /* disable further writes */ if ((xfer = i2c_master_send(client, diswe, 3)) != 3) { - dev_err(&client->dev, "%s: diswe - %d\n", __FUNCTION__, xfer); + dev_err(&client->dev, "%s: diswe - %d\n", __func__, xfer); return -EIO; } @@ -255,9 +282,9 @@ static int x1205_fix_osc(struct i2c_client *client) tm.tm_hour = tm.tm_min = tm.tm_sec = 0; - if ((err = x1205_set_datetime(client, &tm, 0, X1205_CCR_BASE)) < 0) - dev_err(&client->dev, - "unable to restart the oscillator\n"); + err = x1205_set_datetime(client, &tm, 0, X1205_CCR_BASE, 0); + if (err < 0) + dev_err(&client->dev, "unable to restart the oscillator\n"); return err; } @@ -273,12 +300,12 @@ static int x1205_get_dtrim(struct i2c_client *client, int *trim) }; /* read dtr register */ - if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); + if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); return -EIO; } - dev_dbg(&client->dev, "%s: raw dtr=%x\n", __FUNCTION__, dtr); + dev_dbg(&client->dev, "%s: raw dtr=%x\n", __func__, dtr); *trim = 0; @@ -305,12 +332,12 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim) }; /* read atr register */ - if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); + if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); return -EIO; } - dev_dbg(&client->dev, "%s: raw atr=%x\n", __FUNCTION__, atr); + dev_dbg(&client->dev, "%s: raw atr=%x\n", __func__, atr); /* atr is a two's complement value on 6 bits, * perform sign extension. The formula is @@ -319,11 +346,11 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim) if (atr & 0x20) atr |= 0xC0; - dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __FUNCTION__, atr, atr); + dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __func__, atr, atr); *trim = (atr * 250) + 11000; - dev_dbg(&client->dev, "%s: real=%d\n", __FUNCTION__, *trim); + dev_dbg(&client->dev, "%s: real=%d\n", __func__, *trim); return 0; } @@ -377,7 +404,7 @@ static int x1205_validate_client(struct i2c_client *client) if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) { dev_err(&client->dev, "%s: could not read register %x\n", - __FUNCTION__, probe_zero_pattern[i]); + __func__, probe_zero_pattern[i]); return -EIO; } @@ -385,7 +412,7 @@ static int x1205_validate_client(struct i2c_client *client) if ((buf & probe_zero_pattern[i+1]) != 0) { dev_err(&client->dev, "%s: register=%02x, zero pattern=%d, value=%x\n", - __FUNCTION__, probe_zero_pattern[i], i, buf); + __func__, probe_zero_pattern[i], i, buf); return -ENODEV; } @@ -405,7 +432,7 @@ static int x1205_validate_client(struct i2c_client *client) if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) { dev_err(&client->dev, "%s: could not read register %x\n", - __FUNCTION__, probe_limits_pattern[i].reg); + __func__, probe_limits_pattern[i].reg); return -EIO; } @@ -416,7 +443,7 @@ static int x1205_validate_client(struct i2c_client *client) value < probe_limits_pattern[i].min) { dev_dbg(&client->dev, "%s: register=%x, lim pattern=%d, value=%d\n", - __FUNCTION__, probe_limits_pattern[i].reg, + __func__, probe_limits_pattern[i].reg, i, value); return -ENODEV; @@ -428,14 +455,33 @@ static int x1205_validate_client(struct i2c_client *client) static int x1205_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - return x1205_get_datetime(to_i2c_client(dev), - &alrm->time, X1205_ALM0_BASE); + int err; + unsigned char intreg, status; + static unsigned char int_addr[2] = { 0, X1205_REG_INT }; + struct i2c_client *client = to_i2c_client(dev); + struct i2c_msg msgs[] = { + { client->addr, 0, 2, int_addr }, /* setup read ptr */ + { client->addr, I2C_M_RD, 1, &intreg }, /* read INT register */ + }; + + /* read interrupt register and status register */ + if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { + dev_err(&client->dev, "%s: read error\n", __func__); + return -EIO; + } + err = x1205_get_status(client, &status); + if (err == 0) { + alrm->pending = (status & X1205_SR_AL0) ? 1 : 0; + alrm->enabled = (intreg & X1205_INT_AL0E) ? 1 : 0; + err = x1205_get_datetime(client, &alrm->time, X1205_ALM0_BASE); + } + return err; } static int x1205_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { return x1205_set_datetime(to_i2c_client(dev), - &alrm->time, 1, X1205_ALM0_BASE); + &alrm->time, 1, X1205_ALM0_BASE, alrm->enabled); } static int x1205_rtc_read_time(struct device *dev, struct rtc_time *tm) @@ -447,7 +493,7 @@ static int x1205_rtc_read_time(struct device *dev, struct rtc_time *tm) static int x1205_rtc_set_time(struct device *dev, struct rtc_time *tm) { return x1205_set_datetime(to_i2c_client(dev), - tm, 1, X1205_CCR_BASE); + tm, 1, X1205_CCR_BASE, 0); } static int x1205_rtc_proc(struct device *dev, struct seq_file *seq) @@ -497,58 +543,50 @@ static ssize_t x1205_sysfs_show_dtrim(struct device *dev, } static DEVICE_ATTR(dtrim, S_IRUGO, x1205_sysfs_show_dtrim, NULL); -static int x1205_attach(struct i2c_adapter *adapter) +static int x1205_sysfs_register(struct device *dev) { - return i2c_probe(adapter, &addr_data, x1205_probe); + int err; + + err = device_create_file(dev, &dev_attr_atrim); + if (err) + return err; + + err = device_create_file(dev, &dev_attr_dtrim); + if (err) + device_remove_file(dev, &dev_attr_atrim); + + return err; } -static int x1205_probe(struct i2c_adapter *adapter, int address, int kind) +static void x1205_sysfs_unregister(struct device *dev) +{ + device_remove_file(dev, &dev_attr_atrim); + device_remove_file(dev, &dev_attr_dtrim); +} + + +static int x1205_probe(struct i2c_client *client, + const struct i2c_device_id *id) { int err = 0; unsigned char sr; - struct i2c_client *client; struct rtc_device *rtc; - dev_dbg(&adapter->dev, "%s\n", __FUNCTION__); + dev_dbg(&client->dev, "%s\n", __func__); - if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) { - err = -ENODEV; - goto exit; - } - - if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - /* I2C client */ - client->addr = address; - client->driver = &x1205_driver; - client->adapter = adapter; - - strlcpy(client->name, x1205_driver.driver.name, I2C_NAME_SIZE); - - /* Verify the chip is really an X1205 */ - if (kind < 0) { - if (x1205_validate_client(client) < 0) { - err = -ENODEV; - goto exit_kfree; - } - } + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -ENODEV; - /* Inform the i2c layer */ - if ((err = i2c_attach_client(client))) - goto exit_kfree; + if (x1205_validate_client(client) < 0) + return -ENODEV; dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); rtc = rtc_device_register(x1205_driver.driver.name, &client->dev, &x1205_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - err = PTR_ERR(rtc); - goto exit_detach; - } + if (IS_ERR(rtc)) + return PTR_ERR(rtc); i2c_set_clientdata(client, rtc); @@ -565,45 +603,42 @@ static int x1205_probe(struct i2c_adapter *adapter, int address, int kind) else dev_err(&client->dev, "couldn't read status\n"); - err = device_create_file(&client->dev, &dev_attr_atrim); - if (err) goto exit_devreg; - err = device_create_file(&client->dev, &dev_attr_dtrim); - if (err) goto exit_atrim; + err = x1205_sysfs_register(&client->dev); + if (err) + goto exit_devreg; return 0; -exit_atrim: - device_remove_file(&client->dev, &dev_attr_atrim); - exit_devreg: rtc_device_unregister(rtc); -exit_detach: - i2c_detach_client(client); - -exit_kfree: - kfree(client); - -exit: return err; } -static int x1205_detach(struct i2c_client *client) +static int x1205_remove(struct i2c_client *client) { - int err; struct rtc_device *rtc = i2c_get_clientdata(client); - if (rtc) - rtc_device_unregister(rtc); - - if ((err = i2c_detach_client(client))) - return err; - - kfree(client); - + rtc_device_unregister(rtc); + x1205_sysfs_unregister(&client->dev); return 0; } +static const struct i2c_device_id x1205_id[] = { + { "x1205", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, x1205_id); + +static struct i2c_driver x1205_driver = { + .driver = { + .name = "rtc-x1205", + }, + .probe = x1205_probe, + .remove = x1205_remove, + .id_table = x1205_id, +}; + static int __init x1205_init(void) { return i2c_add_driver(&x1205_driver);