X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fw1%2Fw1_therm.c;fp=drivers%2Fw1%2Fw1_therm.c;h=4577df3cfc4839e8537ed22618f02381a1b1b079;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=0b18178905034e788742938718041f9e1333ff13;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git diff --git a/drivers/w1/w1_therm.c b/drivers/w1/w1_therm.c index 0b1817890..4577df3cf 100644 --- a/drivers/w1/w1_therm.c +++ b/drivers/w1/w1_therm.c @@ -1,8 +1,8 @@ /* - * w1_therm.c + * w1_therm.c * * Copyright (c) 2004 Evgeniy Polyakov - * + * * * This program is free software; you can redistribute it and/or modify * it under the therms of the GNU General Public License as published by @@ -38,31 +38,91 @@ MODULE_AUTHOR("Evgeniy Polyakov "); MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, temperature family."); static u8 bad_roms[][9] = { - {0xaa, 0x00, 0x4b, 0x46, 0xff, 0xff, 0x0c, 0x10, 0x87}, + {0xaa, 0x00, 0x4b, 0x46, 0xff, 0xff, 0x0c, 0x10, 0x87}, {} }; -static ssize_t w1_therm_read_name(struct device *, char *); -static ssize_t w1_therm_read_temp(struct device *, char *); static ssize_t w1_therm_read_bin(struct kobject *, char *, loff_t, size_t); +static struct bin_attribute w1_therm_bin_attr = { + .attr = { + .name = "w1_slave", + .mode = S_IRUGO, + .owner = THIS_MODULE, + }, + .size = W1_SLAVE_DATA_SIZE, + .read = w1_therm_read_bin, +}; + +static int w1_therm_add_slave(struct w1_slave *sl) +{ + return sysfs_create_bin_file(&sl->dev.kobj, &w1_therm_bin_attr); +} + +static void w1_therm_remove_slave(struct w1_slave *sl) +{ + sysfs_remove_bin_file(&sl->dev.kobj, &w1_therm_bin_attr); +} + static struct w1_family_ops w1_therm_fops = { - .rname = &w1_therm_read_name, - .rbin = &w1_therm_read_bin, - .rval = &w1_therm_read_temp, - .rvalname = "temp1_input", + .add_slave = w1_therm_add_slave, + .remove_slave = w1_therm_remove_slave, +}; + +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 ssize_t w1_therm_read_name(struct device *dev, char *buf) +static struct w1_family w1_therm_family_DS1822 = { + .fid = W1_THERM_DS1822, + .fops = &w1_therm_fops, +}; + +struct w1_therm_family_converter { - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + u8 broken; + u16 reserved; + struct w1_family *f; + int (*convert)(u8 rom[9]); +}; - return sprintf(buf, "%s\n", sl->name); +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[] = { + { + .f = &w1_therm_family_DS18S20, + .convert = w1_DS18S20_convert_temp + }, + { + .f = &w1_therm_family_DS1822, + .convert = w1_DS18B20_convert_temp + }, + { + .f = &w1_therm_family_DS18B20, + .convert = w1_DS18B20_convert_temp + }, +}; + +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_convert_temp(u8 rom[9]) +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 +137,15 @@ static inline int w1_convert_temp(u8 rom[9]) return t; } -static ssize_t w1_therm_read_temp(struct device *dev, char *buf) +static inline int w1_convert_temp(u8 rom[9], u8 fid) { - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + int i; - return sprintf(buf, "%d\n", w1_convert_temp(sl->rom)); + for (i=0; ifid == fid) + return w1_therm_families[i].convert(rom); + + return 0; } static int w1_therm_check_rom(u8 rom[9]) @@ -97,8 +161,7 @@ static int w1_therm_check_rom(u8 rom[9]) static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count) { - struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj), - struct w1_slave, dev); + struct w1_slave *sl = kobj_to_w1_slave(kobj); struct w1_master *dev = sl->master; u8 rom[9], crc, verdict; int i, max_trying = 10; @@ -127,15 +190,10 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si crc = 0; while (max_trying--) { - if (!w1_reset_bus (dev)) { + if (!w1_reset_select_slave(sl)) { int count = 0; - u8 match[9] = {W1_MATCH_ROM, }; unsigned int tm = 750; - memcpy(&match[1], (u64 *) & sl->reg_num, 8); - - w1_write_block(dev, match, 9); - w1_write_8(dev, W1_CONVERT_TEMP); while (tm) { @@ -144,9 +202,8 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si flush_signals(current); } - if (!w1_reset_bus (dev)) { - w1_write_block(dev, match, 9); - + if (!w1_reset_select_slave(sl)) { + w1_write_8(dev, W1_READ_SCRATCHPAD); if ((count = w1_read_block(dev, rom, 9)) != 9) { dev_warn(&dev->dev, "w1_read_block() returned %d instead of 9.\n", count); @@ -156,7 +213,6 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si if (rom[8] == crc && rom[0]) verdict = 1; - } } @@ -176,7 +232,7 @@ 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 +242,26 @@ 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