diff options
| -rw-r--r-- | drivers/w1/w1_family.h | 4 | ||||
| -rw-r--r-- | drivers/w1/w1_therm.c | 92 |
2 files changed, 85 insertions, 11 deletions
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 07fa49412a90..2995c6cb869f 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -27,8 +27,10 @@ #include <asm/atomic.h> #define W1_FAMILY_DEFAULT 0 -#define W1_FAMILY_THERM 0x10 #define W1_FAMILY_SMEM 0x01 +#define W1_THERM_DS18S20 0x10 +#define W1_THERM_DS1822 0x22 +#define W1_THERM_DS18B20 0x28 #define MAXNAMELEN 32 diff --git a/drivers/w1/w1_therm.c b/drivers/w1/w1_therm.c index 70310f7a722e..84e8043a4499 100644 --- a/drivers/w1/w1_therm.c +++ b/drivers/w1/w1_therm.c @@ -53,6 +53,50 @@ static struct w1_family_ops w1_therm_fops = { .rvalname = "temp1_input", }; +static struct w1_family w1_therm_family_DS18S20 = { + .fid = W1_THERM_DS18S20, + .fops = &w1_therm_fops, +}; + +static struct w1_family w1_therm_family_DS18B20 = { + .fid = W1_THERM_DS18B20, + .fops = &w1_therm_fops, +}; +static struct w1_family w1_therm_family_DS1822 = { + .fid = W1_THERM_DS1822, + .fops = &w1_therm_fops, +}; + +struct w1_therm_family_converter +{ + u8 fid; + u8 broken; + u16 reserved; + struct w1_family *f; + int (*convert)(u8 rom[9]); +}; + +static inline int w1_DS18B20_convert_temp(u8 rom[9]); +static inline int w1_DS18S20_convert_temp(u8 rom[9]); + +static struct w1_therm_family_converter w1_therm_families[] = { + { + .fid = W1_THERM_DS18S20, + .f = &w1_therm_family_DS18S20, + .convert = w1_DS18S20_convert_temp + }, + { + .fid = W1_THERM_DS1822, + .f = &w1_therm_family_DS1822, + .convert = w1_DS18B20_convert_temp + }, + { + .fid = W1_THERM_DS18B20, + .f = &w1_therm_family_DS18B20, + .convert = w1_DS18B20_convert_temp + }, +}; + static ssize_t w1_therm_read_name(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); @@ -60,9 +104,19 @@ static ssize_t w1_therm_read_name(struct device *dev, struct device_attribute *a return sprintf(buf, "%s\n", sl->name); } -static inline int w1_convert_temp(u8 rom[9]) +static inline int w1_DS18B20_convert_temp(u8 rom[9]) +{ + int t = (rom[1] << 8) | rom[0]; + t /= 16; + return t; +} + +static inline int w1_DS18S20_convert_temp(u8 rom[9]) { int t, h; + + if (!rom[7]) + return 0; if (rom[1] == 0) t = ((s32)rom[0] >> 1)*1000; @@ -77,11 +131,22 @@ static inline int w1_convert_temp(u8 rom[9]) return t; } +static inline int w1_convert_temp(u8 rom[9], u8 fid) +{ + int i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) + if (w1_therm_families[i].fid == fid) + return w1_therm_families[i].convert(rom); + + return 0; +} + static ssize_t w1_therm_read_temp(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); - return sprintf(buf, "%d\n", w1_convert_temp(sl->rom)); + return sprintf(buf, "%d\n", w1_convert_temp(sl->rom, sl->family->fid)); } static int w1_therm_check_rom(u8 rom[9]) @@ -176,7 +241,7 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si for (i = 0; i < 9; ++i) count += sprintf(buf + count, "%02x ", sl->rom[i]); - count += sprintf(buf + count, "t=%d\n", w1_convert_temp(rom)); + count += sprintf(buf + count, "t=%d\n", w1_convert_temp(rom, sl->family->fid)); out: up(&dev->mutex); out_dec: @@ -186,19 +251,26 @@ out_dec: return count; } -static struct w1_family w1_therm_family = { - .fid = W1_FAMILY_THERM, - .fops = &w1_therm_fops, -}; - static int __init w1_therm_init(void) { - return w1_register_family(&w1_therm_family); + int err, i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) { + err = w1_register_family(w1_therm_families[i].f); + if (err) + w1_therm_families[i].broken = 1; + } + + return 0; } static void __exit w1_therm_fini(void) { - w1_unregister_family(&w1_therm_family); + int i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) + if (!w1_therm_families[i].broken) + w1_unregister_family(w1_therm_families[i].f); } module_init(w1_therm_init); |