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authorSteven Whitehouse <swhiteho@redhat.com>2006-03-31 15:34:58 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2006-03-31 15:34:58 -0500
commit86579dd06deecfa6ac88d5e84e4d63c397cd6f6d (patch)
treeb4475d3ccde53015ad84a06e4e55e64591171b75 /drivers/w1/slaves
parent7ea9ea832212c4a755650f7c7cc1ff0b63292a41 (diff)
parenta0f067802576d4eb4c65d40b8ee7d6ea3c81dd61 (diff)
Merge branch 'master'
Diffstat (limited to 'drivers/w1/slaves')
-rw-r--r--drivers/w1/slaves/Kconfig38
-rw-r--r--drivers/w1/slaves/Makefile12
-rw-r--r--drivers/w1/slaves/w1_ds2433.c329
-rw-r--r--drivers/w1/slaves/w1_smem.c71
-rw-r--r--drivers/w1/slaves/w1_therm.c268
5 files changed, 718 insertions, 0 deletions
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
new file mode 100644
index 00000000000..f9d4c91fc53
--- /dev/null
+++ b/drivers/w1/slaves/Kconfig
@@ -0,0 +1,38 @@
+#
+# 1-wire slaves configuration
+#
+
+menu "1-wire Slaves"
+ depends on W1
+
+config W1_SLAVE_THERM
+ tristate "Thermal family implementation"
+ depends on W1
+ help
+ Say Y here if you want to connect 1-wire thermal sensors to you
+ wire.
+
+config W1_SLAVE_SMEM
+ tristate "Simple 64bit memory family implementation"
+ depends on W1
+ help
+ Say Y here if you want to connect 1-wire
+ simple 64bit memory rom(ds2401/ds2411/ds1990*) to you wire.
+
+config W1_SLAVE_DS2433
+ tristate "4kb EEPROM family support (DS2433)"
+ depends on W1
+ help
+ Say Y here if you want to use a 1-wire
+ 4kb EEPROM family device (DS2433).
+
+config W1_SLAVE_DS2433_CRC
+ bool "Protect DS2433 data with a CRC16"
+ depends on W1_DS2433
+ select CRC16
+ help
+ Say Y here to protect DS2433 data with a CRC16.
+ Each block has 30 bytes of data and a two byte CRC16.
+ Full block writes are only allowed if the CRC is valid.
+
+endmenu
diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
new file mode 100644
index 00000000000..70e21e2d70c
--- /dev/null
+++ b/drivers/w1/slaves/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for the Dallas's 1-wire slaves.
+#
+
+ifeq ($(CONFIG_W1_SLAVE_DS2433_CRC), y)
+EXTRA_CFLAGS += -DCONFIG_W1_F23_CRC
+endif
+
+obj-$(CONFIG_W1_SLAVE_THERM) += w1_therm.o
+obj-$(CONFIG_W1_SLAVE_SMEM) += w1_smem.o
+obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
+
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
new file mode 100644
index 00000000000..fb118be789e
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -0,0 +1,329 @@
+/*
+ * w1_ds2433.c - w1 family 23 (DS2433) driver
+ *
+ * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#ifdef CONFIG_W1_F23_CRC
+#include <linux/crc16.h>
+
+#define CRC16_INIT 0
+#define CRC16_VALID 0xb001
+
+#endif
+
+#include "../w1.h"
+#include "../w1_io.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>");
+MODULE_DESCRIPTION("w1 family 23 driver for DS2433, 4kb EEPROM");
+
+#define W1_EEPROM_SIZE 512
+#define W1_PAGE_COUNT 16
+#define W1_PAGE_SIZE 32
+#define W1_PAGE_BITS 5
+#define W1_PAGE_MASK 0x1F
+
+#define W1_F23_TIME 300
+
+#define W1_F23_READ_EEPROM 0xF0
+#define W1_F23_WRITE_SCRATCH 0x0F
+#define W1_F23_READ_SCRATCH 0xAA
+#define W1_F23_COPY_SCRATCH 0x55
+
+struct w1_f23_data {
+ u8 memory[W1_EEPROM_SIZE];
+ u32 validcrc;
+};
+
+/**
+ * Check the file size bounds and adjusts count as needed.
+ * This would not be needed if the file size didn't reset to 0 after a write.
+ */
+static inline size_t w1_f23_fix_count(loff_t off, size_t count, size_t size)
+{
+ if (off > size)
+ return 0;
+
+ if ((off + count) > size)
+ return (size - off);
+
+ return count;
+}
+
+#ifdef CONFIG_W1_F23_CRC
+static int w1_f23_refresh_block(struct w1_slave *sl, struct w1_f23_data *data,
+ int block)
+{
+ u8 wrbuf[3];
+ int off = block * W1_PAGE_SIZE;
+
+ if (data->validcrc & (1 << block))
+ return 0;
+
+ if (w1_reset_select_slave(sl)) {
+ data->validcrc = 0;
+ return -EIO;
+ }
+
+ wrbuf[0] = W1_F23_READ_EEPROM;
+ wrbuf[1] = off & 0xff;
+ wrbuf[2] = off >> 8;
+ w1_write_block(sl->master, wrbuf, 3);
+ w1_read_block(sl->master, &data->memory[off], W1_PAGE_SIZE);
+
+ /* cache the block if the CRC is valid */
+ if (crc16(CRC16_INIT, &data->memory[off], W1_PAGE_SIZE) == CRC16_VALID)
+ data->validcrc |= (1 << block);
+
+ return 0;
+}
+#endif /* CONFIG_W1_F23_CRC */
+
+static ssize_t w1_f23_read_bin(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+#ifdef CONFIG_W1_F23_CRC
+ struct w1_f23_data *data = sl->family_data;
+ int i, min_page, max_page;
+#else
+ u8 wrbuf[3];
+#endif
+
+ if ((count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
+ return 0;
+
+ atomic_inc(&sl->refcnt);
+ if (down_interruptible(&sl->master->mutex)) {
+ count = 0;
+ goto out_dec;
+ }
+
+#ifdef CONFIG_W1_F23_CRC
+
+ min_page = (off >> W1_PAGE_BITS);
+ max_page = (off + count - 1) >> W1_PAGE_BITS;
+ for (i = min_page; i <= max_page; i++) {
+ if (w1_f23_refresh_block(sl, data, i)) {
+ count = -EIO;
+ goto out_up;
+ }
+ }
+ memcpy(buf, &data->memory[off], count);
+
+#else /* CONFIG_W1_F23_CRC */
+
+ /* read directly from the EEPROM */
+ if (w1_reset_select_slave(sl)) {
+ count = -EIO;
+ goto out_up;
+ }
+
+ wrbuf[0] = W1_F23_READ_EEPROM;
+ wrbuf[1] = off & 0xff;
+ wrbuf[2] = off >> 8;
+ w1_write_block(sl->master, wrbuf, 3);
+ w1_read_block(sl->master, buf, count);
+
+#endif /* CONFIG_W1_F23_CRC */
+
+out_up:
+ up(&sl->master->mutex);
+out_dec:
+ atomic_dec(&sl->refcnt);
+
+ return count;
+}
+
+/**
+ * Writes to the scratchpad and reads it back for verification.
+ * Then copies the scratchpad to EEPROM.
+ * The data must be on one page.
+ * The master must be locked.
+ *
+ * @param sl The slave structure
+ * @param addr Address for the write
+ * @param len length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
+ * @param data The data to write
+ * @return 0=Success -1=failure
+ */
+static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
+{
+ u8 wrbuf[4];
+ u8 rdbuf[W1_PAGE_SIZE + 3];
+ u8 es = (addr + len - 1) & 0x1f;
+
+ /* Write the data to the scratchpad */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ wrbuf[0] = W1_F23_WRITE_SCRATCH;
+ wrbuf[1] = addr & 0xff;
+ wrbuf[2] = addr >> 8;
+
+ w1_write_block(sl->master, wrbuf, 3);
+ w1_write_block(sl->master, data, len);
+
+ /* Read the scratchpad and verify */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ w1_write_8(sl->master, W1_F23_READ_SCRATCH);
+ w1_read_block(sl->master, rdbuf, len + 3);
+
+ /* Compare what was read against the data written */
+ if ((rdbuf[0] != wrbuf[1]) || (rdbuf[1] != wrbuf[2]) ||
+ (rdbuf[2] != es) || (memcmp(data, &rdbuf[3], len) != 0))
+ return -1;
+
+ /* Copy the scratchpad to EEPROM */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ wrbuf[0] = W1_F23_COPY_SCRATCH;
+ wrbuf[3] = es;
+ w1_write_block(sl->master, wrbuf, 4);
+
+ /* Sleep for 5 ms to wait for the write to complete */
+ msleep(5);
+
+ /* Reset the bus to wake up the EEPROM (this may not be needed) */
+ w1_reset_bus(sl->master);
+
+ return 0;
+}
+
+static ssize_t w1_f23_write_bin(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ int addr, len, idx;
+
+ if ((count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
+ return 0;
+
+#ifdef CONFIG_W1_F23_CRC
+ /* can only write full blocks in cached mode */
+ if ((off & W1_PAGE_MASK) || (count & W1_PAGE_MASK)) {
+ dev_err(&sl->dev, "invalid offset/count off=%d cnt=%zd\n",
+ (int)off, count);
+ return -EINVAL;
+ }
+
+ /* make sure the block CRCs are valid */
+ for (idx = 0; idx < count; idx += W1_PAGE_SIZE) {
+ if (crc16(CRC16_INIT, &buf[idx], W1_PAGE_SIZE) != CRC16_VALID) {
+ dev_err(&sl->dev, "bad CRC at offset %d\n", (int)off);
+ return -EINVAL;
+ }
+ }
+#endif /* CONFIG_W1_F23_CRC */
+
+ atomic_inc(&sl->refcnt);
+ if (down_interruptible(&sl->master->mutex)) {
+ count = 0;
+ goto out_dec;
+ }
+
+ /* Can only write data to one page at a time */
+ idx = 0;
+ while (idx < count) {
+ addr = off + idx;
+ len = W1_PAGE_SIZE - (addr & W1_PAGE_MASK);
+ if (len > (count - idx))
+ len = count - idx;
+
+ if (w1_f23_write(sl, addr, len, &buf[idx]) < 0) {
+ count = -EIO;
+ goto out_up;
+ }
+ idx += len;
+ }
+
+out_up:
+ up(&sl->master->mutex);
+out_dec:
+ atomic_dec(&sl->refcnt);
+
+ return count;
+}
+
+static struct bin_attribute w1_f23_bin_attr = {
+ .attr = {
+ .name = "eeprom",
+ .mode = S_IRUGO | S_IWUSR,
+ .owner = THIS_MODULE,
+ },
+ .size = W1_EEPROM_SIZE,
+ .read = w1_f23_read_bin,
+ .write = w1_f23_write_bin,
+};
+
+static int w1_f23_add_slave(struct w1_slave *sl)
+{
+ int err;
+#ifdef CONFIG_W1_F23_CRC
+ struct w1_f23_data *data;
+
+ data = kmalloc(sizeof(struct w1_f23_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ memset(data, 0, sizeof(struct w1_f23_data));
+ sl->family_data = data;
+
+#endif /* CONFIG_W1_F23_CRC */
+
+ err = sysfs_create_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
+
+#ifdef CONFIG_W1_F23_CRC
+ if (err)
+ kfree(data);
+#endif /* CONFIG_W1_F23_CRC */
+
+ return err;
+}
+
+static void w1_f23_remove_slave(struct w1_slave *sl)
+{
+#ifdef CONFIG_W1_F23_CRC
+ kfree(sl->family_data);
+ sl->family_data = NULL;
+#endif /* CONFIG_W1_F23_CRC */
+ sysfs_remove_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
+}
+
+static struct w1_family_ops w1_f23_fops = {
+ .add_slave = w1_f23_add_slave,
+ .remove_slave = w1_f23_remove_slave,
+};
+
+static struct w1_family w1_family_23 = {
+ .fid = W1_EEPROM_DS2433,
+ .fops = &w1_f23_fops,
+};
+
+static int __init w1_f23_init(void)
+{
+ return w1_register_family(&w1_family_23);
+}
+
+static void __exit w1_f23_fini(void)
+{
+ w1_unregister_family(&w1_family_23);
+}
+
+module_init(w1_f23_init);
+module_exit(w1_f23_fini);
diff --git a/drivers/w1/slaves/w1_smem.c b/drivers/w1/slaves/w1_smem.c
new file mode 100644
index 00000000000..c6d3be54f94
--- /dev/null
+++ b/drivers/w1/slaves/w1_smem.c
@@ -0,0 +1,71 @@
+/*
+ * w1_smem.c
+ *
+ * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the smems of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <asm/types.h>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+
+#include "../w1.h"
+#include "../w1_io.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
+MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family.");
+
+static struct w1_family w1_smem_family_01 = {
+ .fid = W1_FAMILY_SMEM_01,
+};
+
+static struct w1_family w1_smem_family_81 = {
+ .fid = W1_FAMILY_SMEM_81,
+};
+
+static int __init w1_smem_init(void)
+{
+ int err;
+
+ err = w1_register_family(&w1_smem_family_01);
+ if (err)
+ return err;
+
+ err = w1_register_family(&w1_smem_family_81);
+ if (err) {
+ w1_unregister_family(&w1_smem_family_01);
+ return err;
+ }
+
+ return 0;
+}
+
+static void __exit w1_smem_fini(void)
+{
+ w1_unregister_family(&w1_smem_family_01);
+ w1_unregister_family(&w1_smem_family_81);
+}
+
+module_init(w1_smem_init);
+module_exit(w1_smem_fini);
diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
new file mode 100644
index 00000000000..536d16d78de
--- /dev/null
+++ b/drivers/w1/slaves/w1_therm.c
@@ -0,0 +1,268 @@
+/*
+ * w1_therm.c
+ *
+ * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
+ *
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <asm/types.h>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+
+#include "../w1.h"
+#include "../w1_io.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
+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},
+ {}
+ };
+
+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 = {
+ .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 struct w1_family w1_therm_family_DS1822 = {
+ .fid = W1_THERM_DS1822,
+ .fops = &w1_therm_fops,
+};
+
+struct w1_therm_family_converter
+{
+ 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[] = {
+ {
+ .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_DS18S20_convert_temp(u8 rom[9])
+{
+ int t, h;
+
+ if (!rom[7])
+ return 0;
+
+ if (rom[1] == 0)
+ t = ((s32)rom[0] >> 1)*1000;
+ else
+ t = 1000*(-1*(s32)(0x100-rom[0]) >> 1);
+
+ t -= 250;
+ h = 1000*((s32)rom[7] - (s32)rom[6]);
+ h /= (s32)rom[7];
+ t += h;
+
+ 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].f->fid == fid)
+ return w1_therm_families[i].convert(rom);
+
+ return 0;
+}
+
+static int w1_therm_check_rom(u8 rom[9])
+{
+ int i;
+
+ for (i=0; i<sizeof(bad_roms)/9; ++i)
+ if (!memcmp(bad_roms[i], rom, 9))
+ return 1;
+
+ return 0;
+}
+
+static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+ 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;
+
+ atomic_inc(&sl->refcnt);
+ smp_mb__after_atomic_inc();
+ if (down_interruptible(&sl->master->mutex)) {
+ count = 0;
+ goto out_dec;
+ }
+
+ if (off > W1_SLAVE_DATA_SIZE) {
+ count = 0;
+ goto out;
+ }
+ if (off + count > W1_SLAVE_DATA_SIZE) {
+ count = 0;
+ goto out;
+ }
+
+ memset(buf, 0, count);
+ memset(rom, 0, sizeof(rom));
+
+ count = 0;
+ verdict = 0;
+ crc = 0;
+
+ while (max_trying--) {
+ if (!w1_reset_select_slave(sl)) {
+ int count = 0;
+ unsigned int tm = 750;
+
+ w1_write_8(dev, W1_CONVERT_TEMP);
+
+ while (tm) {
+ tm = msleep_interruptible(tm);
+ if (signal_pending(current))
+ flush_signals(current);
+ }
+
+ 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);
+ }
+
+ crc = w1_calc_crc8(rom, 8);
+
+ if (rom[8] == crc && rom[0])
+ verdict = 1;
+ }
+ }
+
+ if (!w1_therm_check_rom(rom))
+ break;
+ }
+
+ for (i = 0; i < 9; ++i)
+ count += sprintf(buf + count, "%02x ", rom[i]);
+ count += sprintf(buf + count, ": crc=%02x %s\n",
+ crc, (verdict) ? "YES" : "NO");
+ if (verdict)
+ memcpy(sl->rom, rom, sizeof(sl->rom));
+ else
+ dev_warn(&dev->dev, "18S20 doesn't respond to CONVERT_TEMP.\n");
+
+ 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, sl->family->fid));
+out:
+ up(&dev->mutex);
+out_dec:
+ smp_mb__before_atomic_inc();
+ atomic_dec(&sl->refcnt);
+
+ return count;
+}
+
+static int __init w1_therm_init(void)
+{
+ 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)
+{
+ 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);
+module_exit(w1_therm_fini);