X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Frtc%2Frtc-m41t80.c;h=038095d99976e294629873443866b63e7eb7d19e;hb=49c39b4953e545ce3b5957cce22e1ade01c6e642;hp=316bfaa80872195badfeda9ec87de81265d77d96;hpb=3760f736716f74bdc62a4ba5406934338da93eb2;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 316bfaa..038095d 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -13,19 +13,21 @@ * */ -#include +#include +#include #include +#include +#include +#include #include +#include #include -#include -#include -#include #ifdef CONFIG_RTC_DRV_M41T80_WDT -#include -#include -#include #include #include +#include +#include +#include #endif #define M41T80_REG_SSEC 0 @@ -54,21 +56,29 @@ #define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */ #define M41T80_FLAGS_AF (1 << 6) /* AF: Alarm Flag Bit */ #define M41T80_FLAGS_BATT_LOW (1 << 4) /* BL: Battery Low Bit */ +#define M41T80_WATCHDOG_RB2 (1 << 7) /* RB: Watchdog resolution */ +#define M41T80_WATCHDOG_RB1 (1 << 1) /* RB: Watchdog resolution */ +#define M41T80_WATCHDOG_RB0 (1 << 0) /* RB: Watchdog resolution */ -#define M41T80_FEATURE_HT (1 << 0) -#define M41T80_FEATURE_BL (1 << 1) +#define M41T80_FEATURE_HT (1 << 0) /* Halt feature */ +#define M41T80_FEATURE_BL (1 << 1) /* Battery low indicator */ +#define M41T80_FEATURE_SQ (1 << 2) /* Squarewave feature */ +#define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */ +#define M41T80_FEATURE_SQ_ALT (1 << 4) /* RSx bits are in reg 4 */ #define DRV_VERSION "0.05" static const struct i2c_device_id m41t80_id[] = { - { "m41t80", 0 }, - { "m41t81", M41T80_FEATURE_HT }, - { "m41t81s", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, - { "m41t82", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, - { "m41t83", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, - { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, - { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, - { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, + { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT }, + { "m41t65", M41T80_FEATURE_HT | M41T80_FEATURE_WD }, + { "m41t80", M41T80_FEATURE_SQ }, + { "m41t81", M41T80_FEATURE_HT | M41T80_FEATURE_SQ}, + { "m41t81s", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "m41t82", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "m41t83", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, + { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, { } }; MODULE_DEVICE_TABLE(i2c, m41t80_id); @@ -102,15 +112,15 @@ static int m41t80_get_datetime(struct i2c_client *client, return -EIO; } - tm->tm_sec = BCD2BIN(buf[M41T80_REG_SEC] & 0x7f); - tm->tm_min = BCD2BIN(buf[M41T80_REG_MIN] & 0x7f); - tm->tm_hour = BCD2BIN(buf[M41T80_REG_HOUR] & 0x3f); - tm->tm_mday = BCD2BIN(buf[M41T80_REG_DAY] & 0x3f); + tm->tm_sec = bcd2bin(buf[M41T80_REG_SEC] & 0x7f); + tm->tm_min = bcd2bin(buf[M41T80_REG_MIN] & 0x7f); + tm->tm_hour = bcd2bin(buf[M41T80_REG_HOUR] & 0x3f); + tm->tm_mday = bcd2bin(buf[M41T80_REG_DAY] & 0x3f); tm->tm_wday = buf[M41T80_REG_WDAY] & 0x07; - tm->tm_mon = BCD2BIN(buf[M41T80_REG_MON] & 0x1f) - 1; + tm->tm_mon = bcd2bin(buf[M41T80_REG_MON] & 0x1f) - 1; /* assume 20YY not 19YY, and ignore the Century Bit */ - tm->tm_year = BCD2BIN(buf[M41T80_REG_YEAR]) + 100; + tm->tm_year = bcd2bin(buf[M41T80_REG_YEAR]) + 100; return 0; } @@ -153,19 +163,19 @@ static int m41t80_set_datetime(struct i2c_client *client, struct rtc_time *tm) /* Merge time-data and register flags into buf[0..7] */ buf[M41T80_REG_SSEC] = 0; buf[M41T80_REG_SEC] = - BIN2BCD(tm->tm_sec) | (buf[M41T80_REG_SEC] & ~0x7f); + bin2bcd(tm->tm_sec) | (buf[M41T80_REG_SEC] & ~0x7f); buf[M41T80_REG_MIN] = - BIN2BCD(tm->tm_min) | (buf[M41T80_REG_MIN] & ~0x7f); + bin2bcd(tm->tm_min) | (buf[M41T80_REG_MIN] & ~0x7f); buf[M41T80_REG_HOUR] = - BIN2BCD(tm->tm_hour) | (buf[M41T80_REG_HOUR] & ~0x3f) ; + bin2bcd(tm->tm_hour) | (buf[M41T80_REG_HOUR] & ~0x3f) ; buf[M41T80_REG_WDAY] = (tm->tm_wday & 0x07) | (buf[M41T80_REG_WDAY] & ~0x07); buf[M41T80_REG_DAY] = - BIN2BCD(tm->tm_mday) | (buf[M41T80_REG_DAY] & ~0x3f); + bin2bcd(tm->tm_mday) | (buf[M41T80_REG_DAY] & ~0x3f); buf[M41T80_REG_MON] = - BIN2BCD(tm->tm_mon + 1) | (buf[M41T80_REG_MON] & ~0x1f); + bin2bcd(tm->tm_mon + 1) | (buf[M41T80_REG_MON] & ~0x1f); /* assume 20YY not 19YY */ - buf[M41T80_REG_YEAR] = BIN2BCD(tm->tm_year % 100); + buf[M41T80_REG_YEAR] = bin2bcd(tm->tm_year % 100); if (i2c_transfer(client->adapter, msgs, 1) != 1) { dev_err(&client->dev, "write error\n"); @@ -280,15 +290,15 @@ static int m41t80_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t) wbuf[0] = M41T80_REG_ALARM_MON; /* offset into rtc's regs */ reg[M41T80_REG_ALARM_SEC] |= t->time.tm_sec >= 0 ? - BIN2BCD(t->time.tm_sec) : 0x80; + bin2bcd(t->time.tm_sec) : 0x80; reg[M41T80_REG_ALARM_MIN] |= t->time.tm_min >= 0 ? - BIN2BCD(t->time.tm_min) : 0x80; + bin2bcd(t->time.tm_min) : 0x80; reg[M41T80_REG_ALARM_HOUR] |= t->time.tm_hour >= 0 ? - BIN2BCD(t->time.tm_hour) : 0x80; + bin2bcd(t->time.tm_hour) : 0x80; reg[M41T80_REG_ALARM_DAY] |= t->time.tm_mday >= 0 ? - BIN2BCD(t->time.tm_mday) : 0x80; + bin2bcd(t->time.tm_mday) : 0x80; if (t->time.tm_mon >= 0) - reg[M41T80_REG_ALARM_MON] |= BIN2BCD(t->time.tm_mon + 1); + reg[M41T80_REG_ALARM_MON] |= bin2bcd(t->time.tm_mon + 1); else reg[M41T80_REG_ALARM_DAY] |= 0x40; @@ -339,15 +349,15 @@ static int m41t80_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *t) t->time.tm_mday = -1; t->time.tm_mon = -1; if (!(reg[M41T80_REG_ALARM_SEC] & 0x80)) - t->time.tm_sec = BCD2BIN(reg[M41T80_REG_ALARM_SEC] & 0x7f); + t->time.tm_sec = bcd2bin(reg[M41T80_REG_ALARM_SEC] & 0x7f); if (!(reg[M41T80_REG_ALARM_MIN] & 0x80)) - t->time.tm_min = BCD2BIN(reg[M41T80_REG_ALARM_MIN] & 0x7f); + t->time.tm_min = bcd2bin(reg[M41T80_REG_ALARM_MIN] & 0x7f); if (!(reg[M41T80_REG_ALARM_HOUR] & 0x80)) - t->time.tm_hour = BCD2BIN(reg[M41T80_REG_ALARM_HOUR] & 0x3f); + t->time.tm_hour = bcd2bin(reg[M41T80_REG_ALARM_HOUR] & 0x3f); if (!(reg[M41T80_REG_ALARM_DAY] & 0x80)) - t->time.tm_mday = BCD2BIN(reg[M41T80_REG_ALARM_DAY] & 0x3f); + t->time.tm_mday = bcd2bin(reg[M41T80_REG_ALARM_DAY] & 0x3f); if (!(reg[M41T80_REG_ALARM_DAY] & 0x40)) - t->time.tm_mon = BCD2BIN(reg[M41T80_REG_ALARM_MON] & 0x1f) - 1; + t->time.tm_mon = bcd2bin(reg[M41T80_REG_ALARM_MON] & 0x1f) - 1; t->time.tm_year = -1; t->time.tm_wday = -1; t->time.tm_yday = -1; @@ -384,9 +394,16 @@ static ssize_t m41t80_sysfs_show_sqwfreq(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); - int val; + struct m41t80_data *clientdata = i2c_get_clientdata(client); + int val, reg_sqw; - val = i2c_smbus_read_byte_data(client, M41T80_REG_SQW); + if (!(clientdata->features & M41T80_FEATURE_SQ)) + return -EINVAL; + + reg_sqw = M41T80_REG_SQW; + if (clientdata->features & M41T80_FEATURE_SQ_ALT) + reg_sqw = M41T80_REG_WDAY; + val = i2c_smbus_read_byte_data(client, reg_sqw); if (val < 0) return -EIO; val = (val >> 4) & 0xf; @@ -406,9 +423,13 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); - int almon, sqw; + struct m41t80_data *clientdata = i2c_get_clientdata(client); + int almon, sqw, reg_sqw; int val = simple_strtoul(buf, NULL, 0); + if (!(clientdata->features & M41T80_FEATURE_SQ)) + return -EINVAL; + if (val) { if (!is_power_of_2(val)) return -EINVAL; @@ -424,13 +445,16 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev, almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON); if (almon < 0) return -EIO; - sqw = i2c_smbus_read_byte_data(client, M41T80_REG_SQW); + reg_sqw = M41T80_REG_SQW; + if (clientdata->features & M41T80_FEATURE_SQ_ALT) + reg_sqw = M41T80_REG_WDAY; + sqw = i2c_smbus_read_byte_data(client, reg_sqw); if (sqw < 0) return -EIO; sqw = (sqw & 0x0f) | (val << 4); if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, almon & ~M41T80_ALMON_SQWE) < 0 || - i2c_smbus_write_byte_data(client, M41T80_REG_SQW, sqw) < 0) + i2c_smbus_write_byte_data(client, reg_sqw, sqw) < 0) return -EIO; if (val && i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, almon | M41T80_ALMON_SQWE) < 0) @@ -497,6 +521,8 @@ static void wdt_ping(void) .buf = i2c_data, }, }; + struct m41t80_data *clientdata = i2c_get_clientdata(save_client); + i2c_data[0] = 0x09; /* watchdog register */ if (wdt_margin > 31) @@ -507,6 +533,13 @@ static void wdt_ping(void) */ i2c_data[1] = wdt_margin<<2 | 0x82; + /* + * M41T65 has three bits for watchdog resolution. Don't set bit 7, as + * that would be an invalid resolution. + */ + if (clientdata->features & M41T80_FEATURE_WD) + i2c_data[1] &= ~M41T80_WATCHDOG_RB2; + i2c_transfer(save_client->adapter, msgs1, 1); } @@ -590,7 +623,7 @@ static ssize_t wdt_read(struct file *file, char __user *buf, * according to their available features. We only actually usefully support * querying capabilities and current status. */ -static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, +static int wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { int new_margin, rv; @@ -629,14 +662,12 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, return -EFAULT; if (rv & WDIOS_DISABLECARD) { - printk(KERN_INFO - "rtc-m41t80: disable watchdog\n"); + pr_info("rtc-m41t80: disable watchdog\n"); wdt_disable(); } if (rv & WDIOS_ENABLECARD) { - printk(KERN_INFO - "rtc-m41t80: enable watchdog\n"); + pr_info("rtc-m41t80: enable watchdog\n"); wdt_ping(); } @@ -645,6 +676,18 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, return -ENOTTY; } +static long wdt_unlocked_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + int ret; + + lock_kernel(); + ret = wdt_ioctl(file, cmd, arg); + unlock_kernel(); + + return ret; +} + /** * wdt_open: * @inode: inode of device @@ -654,12 +697,16 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, static int wdt_open(struct inode *inode, struct file *file) { if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { - if (test_and_set_bit(0, &wdt_is_open)) + lock_kernel(); + if (test_and_set_bit(0, &wdt_is_open)) { + unlock_kernel(); return -EBUSY; + } /* * Activate */ wdt_is_open = 1; + unlock_kernel(); return 0; } return -ENODEV; @@ -701,7 +748,7 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code, static const struct file_operations wdt_fops = { .owner = THIS_MODULE, .read = wdt_read, - .ioctl = wdt_ioctl, + .unlocked_ioctl = wdt_unlocked_ioctl, .write = wdt_write, .open = wdt_open, .release = wdt_release, @@ -803,6 +850,7 @@ static int m41t80_probe(struct i2c_client *client, #ifdef CONFIG_RTC_DRV_M41T80_WDT if (clientdata->features & M41T80_FEATURE_HT) { + save_client = client; rc = misc_register(&wdt_dev); if (rc) goto exit; @@ -811,7 +859,6 @@ static int m41t80_probe(struct i2c_client *client, misc_deregister(&wdt_dev); goto exit; } - save_client = client; } #endif return 0;