ChangeSet 1.1500.11.8, 2004/02/09 13:18:09-08:00, khali at linux-fr.org
[PATCH] I2C: add new chip driver: fscher
This is a new ported driver, fscher, which supports the FSC Hermes chip.
The original driver was written by Reinhard Nissl, who also ported it to
Linux 2.6, as discussed on the lm_sensors mailing list during the last
two weeks. I reviewed the code and we made the necessary changes, so
that what we have now looks good to me. Please apply on top of your i2c
patches stack.
drivers/i2c/chips/Kconfig | 11
drivers/i2c/chips/Makefile | 1
drivers/i2c/chips/fscher.c | 681 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/i2c-id.h | 1
4 files changed, 694 insertions(+)
diff -Nru a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
--- a/drivers/i2c/chips/Kconfig Mon Feb 9 15:05:36 2004
+++ b/drivers/i2c/chips/Kconfig Mon Feb 9 15:05:36 2004
@@ -45,6 +45,17 @@
This driver can also be built as a module. If so, the module
will be called eeprom.
+config SENSORS_FSCHER
+ tristate "FSC Hermes"
+ depends on I2C && EXPERIMENTAL
+ select I2C_SENSOR
+ help
+ If you say yes here you get support for Fujitsu Siemens
+ Computers Hermes sensor chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called fscher.
+
config SENSORS_GL518SM
tristate "Genesys Logic GL518SM"
depends on I2C && EXPERIMENTAL
diff -Nru a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
--- a/drivers/i2c/chips/Makefile Mon Feb 9 15:05:36 2004
+++ b/drivers/i2c/chips/Makefile Mon Feb 9 15:05:36 2004
@@ -8,6 +8,7 @@
obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o
+obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_LM75) += lm75.o
diff -Nru a/drivers/i2c/chips/fscher.c b/drivers/i2c/chips/fscher.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/i2c/chips/fscher.c Mon Feb 9 15:05:36 2004
@@ -0,0 +1,681 @@
+/*
+ * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl at gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * fujitsu siemens hermes chip,
+ * module based on fscpos.c
+ * Copyright (C) 2000 Hermann Jung <hej at odn.de>
+ * Copyright (C) 1998, 1999 Frodo Looijaard <frodol at dds.nl>
+ * and Philip Edelbrock <phil at netroedge.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+
+/*
+ * Addresses to scan
+ */
+
+static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
+static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
+static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
+
+/*
+ * Insmod parameters
+ */
+
+SENSORS_INSMOD_1(fscher);
+
+/*
+ * The FSCHER registers
+ */
+
+/* chip identification */
+#define FSCHER_REG_IDENT_0 0x00
+#define FSCHER_REG_IDENT_1 0x01
+#define FSCHER_REG_IDENT_2 0x02
+#define FSCHER_REG_REVISION 0x03
+
+/* global control and status */
+#define FSCHER_REG_EVENT_STATE 0x04
+#define FSCHER_REG_CONTROL 0x05
+
+/* watchdog */
+#define FSCHER_REG_WDOG_PRESET 0x28
+#define FSCHER_REG_WDOG_STATE 0x23
+#define FSCHER_REG_WDOG_CONTROL 0x21
+
+/* fan 0 */
+#define FSCHER_REG_FAN0_MIN 0x55
+#define FSCHER_REG_FAN0_ACT 0x0e
+#define FSCHER_REG_FAN0_STATE 0x0d
+#define FSCHER_REG_FAN0_RIPPLE 0x0f
+
+/* fan 1 */
+#define FSCHER_REG_FAN1_MIN 0x65
+#define FSCHER_REG_FAN1_ACT 0x6b
+#define FSCHER_REG_FAN1_STATE 0x62
+#define FSCHER_REG_FAN1_RIPPLE 0x6f
+
+/* fan 2 */
+#define FSCHER_REG_FAN2_MIN 0xb5
+#define FSCHER_REG_FAN2_ACT 0xbb
+#define FSCHER_REG_FAN2_STATE 0xb2
+#define FSCHER_REG_FAN2_RIPPLE 0xbf
+
+/* voltage supervision */
+#define FSCHER_REG_VOLT_12 0x45
+#define FSCHER_REG_VOLT_5 0x42
+#define FSCHER_REG_VOLT_BATT 0x48
+
+/* temperature 0 */
+#define FSCHER_REG_TEMP0_ACT 0x64
+#define FSCHER_REG_TEMP0_STATE 0x71
+
+/* temperature 1 */
+#define FSCHER_REG_TEMP1_ACT 0x32
+#define FSCHER_REG_TEMP1_STATE 0x81
+
+/* temperature 2 */
+#define FSCHER_REG_TEMP2_ACT 0x35
+#define FSCHER_REG_TEMP2_STATE 0x91
+
+/*
+ * Functions declaration
+ */
+
+static int fscher_attach_adapter(struct i2c_adapter *adapter);
+static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
+static int fscher_detach_client(struct i2c_client *client);
+static void fscher_update_client(struct i2c_client *client);
+static void fscher_init_client(struct i2c_client *client);
+
+static int fscher_read_value(struct i2c_client *client, u8 reg);
+static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver fscher_driver = {
+ .owner = THIS_MODULE,
+ .name = "fscher",
+ .id = I2C_DRIVERID_FSCHER,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = fscher_attach_adapter,
+ .detach_client = fscher_detach_client,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct fscher_data {
+ struct semaphore update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* register values */
+ u8 revision; /* revision of chip */
+ u8 global_event; /* global event status */
+ u8 global_control; /* global control register */
+ u8 watchdog[3]; /* watchdog */
+ u8 volt[3]; /* 12, 5, battery voltage */
+ u8 temp_act[3]; /* temperature */
+ u8 temp_status[3]; /* status of sensor */
+ u8 fan_act[3]; /* fans revolutions per second */
+ u8 fan_status[3]; /* fan status */
+ u8 fan_min[3]; /* fan min value for rps */
+ u8 fan_ripple[3]; /* divider for rps */
+};
+
+/*
+ * Internal variables
+ */
+
+static int fscher_id = 0;
+
+/*
+ * Sysfs stuff
+ */
+
+#define sysfs_r(kind, offset, reg) \
+static ssize_t show_##kind (struct fscher_data *, char *, int); \
+static ssize_t show_##kind##offset (struct device *, char *); \
+static ssize_t show_##kind##offset (struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct fscher_data *data = i2c_get_clientdata(client); \
+ fscher_update_client(client); \
+ return show_##kind(data, buf, (offset)); \
+}
+
+#define sysfs_w(kind, offset, reg) \
+static ssize_t set_##kind (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
+static ssize_t set_##kind##offset (struct device *, const char *, size_t); \
+static ssize_t set_##kind##offset (struct device *dev, const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct fscher_data *data = i2c_get_clientdata(client); \
+ return set_##kind(client, data, buf, count, (offset), reg); \
+}
+
+#define sysfs_rw_n(kind, offset, reg) \
+sysfs_r(kind, offset, reg) \
+sysfs_w(kind, offset, reg) \
+static DEVICE_ATTR(kind##offset, S_IRUGO | S_IWUSR, show_##kind##offset, set_##kind##offset);
+
+#define sysfs_rw(kind, reg) \
+sysfs_r(kind, 0, reg) \
+sysfs_w(kind, 0, reg) \
+static DEVICE_ATTR(kind, S_IRUGO | S_IWUSR, show_##kind##0, set_##kind##0);
+
+#define sysfs_ro_n(kind, offset, reg) \
+sysfs_r(kind, offset, reg) \
+static DEVICE_ATTR(kind##offset, S_IRUGO, show_##kind##offset, NULL);
+
+#define sysfs_ro(kind, reg) \
+sysfs_r(kind, 0, reg) \
+static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0, NULL);
+
+#define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
+sysfs_rw_n(pwm , offset, reg_min) \
+sysfs_rw_n(fan_status, offset, reg_status) \
+sysfs_rw_n(fan_div , offset, reg_ripple) \
+sysfs_ro_n(fan_input , offset, reg_act)
+
+#define sysfs_temp(offset, reg_status, reg_act) \
+sysfs_rw_n(temp_status, offset, reg_status) \
+sysfs_ro_n(temp_input , offset, reg_act)
+
+#define sysfs_in(offset, reg_act) \
+sysfs_ro_n(in_input, offset, reg_act)
+
+#define sysfs_revision(reg_revision) \
+sysfs_ro(revision, reg_revision)
+
+#define sysfs_alarms(reg_events) \
+sysfs_ro(alarms, reg_events)
+
+#define sysfs_control(reg_control) \
+sysfs_rw(control, reg_control)
+
+#define sysfs_watchdog(reg_control, reg_status, reg_preset) \
+sysfs_rw(watchdog_control, reg_control) \
+sysfs_rw(watchdog_status , reg_status) \
+sysfs_rw(watchdog_preset , reg_preset)
+
+sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
+ FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
+sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
+ FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
+sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
+ FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
+
+sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
+sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
+sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
+
+sysfs_in(0, FSCHER_REG_VOLT_12)
+sysfs_in(1, FSCHER_REG_VOLT_5)
+sysfs_in(2, FSCHER_REG_VOLT_BATT)
+
+sysfs_revision(FSCHER_REG_REVISION)
+sysfs_alarms(FSCHER_REG_EVENTS)
+sysfs_control(FSCHER_REG_CONTROL)
+sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
+
+#define device_create_file_fan(client, offset) \
+do { \
+ device_create_file(&client->dev, &dev_attr_fan_status##offset); \
+ device_create_file(&client->dev, &dev_attr_pwm##offset); \
+ device_create_file(&client->dev, &dev_attr_fan_div##offset); \
+ device_create_file(&client->dev, &dev_attr_fan_input##offset); \
+} while (0)
+
+#define device_create_file_temp(client, offset) \
+do { \
+ device_create_file(&client->dev, &dev_attr_temp_status##offset); \
+ device_create_file(&client->dev, &dev_attr_temp_input##offset); \
+} while (0)
+
+#define device_create_file_in(client, offset) \
+do { \
+ device_create_file(&client->dev, &dev_attr_in_input##offset); \
+} while (0)
+
+#define device_create_file_revision(client) \
+do { \
+ device_create_file(&client->dev, &dev_attr_revision); \
+} while (0)
+
+#define device_create_file_alarms(client) \
+do { \
+ device_create_file(&client->dev, &dev_attr_alarms); \
+} while (0)
+
+#define device_create_file_control(client) \
+do { \
+ device_create_file(&client->dev, &dev_attr_control); \
+} while (0)
+
+#define device_create_file_watchdog(client) \
+do { \
+ device_create_file(&client->dev, &dev_attr_watchdog_status); \
+ device_create_file(&client->dev, &dev_attr_watchdog_control); \
+ device_create_file(&client->dev, &dev_attr_watchdog_preset); \
+} while (0)
+
+/*
+ * Real code
+ */
+
+static int fscher_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_ADAP_CLASS_SMBUS))
+ return 0;
+ return i2c_detect(adapter, &addr_data, fscher_detect);
+}
+
+static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *new_client;
+ struct fscher_data *data;
+ int err = 0;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ /* OK. For now, we presume we have a valid client. We now create the
+ * client structure, even though we cannot fill it completely yet.
+ * But it allows us to access i2c_smbus_read_byte_data. */
+ if (!(new_client = kmalloc(sizeof(struct i2c_client) +
+ sizeof(struct fscher_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ memset(new_client, 0x00, sizeof(struct i2c_client) +
+ sizeof(struct fscher_data));
+
+ /* The Hermes-specific data is placed right after the common I2C
+ * client data. */
+ data = (struct fscher_data *) (new_client + 1);
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &fscher_driver;
+ new_client->flags = 0;
+
+ /* Do the remaining detection unless force or force_fscher parameter */
+ if (kind < 0) {
+ if ((i2c_smbus_read_byte_data(new_client,
+ FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
+ || (i2c_smbus_read_byte_data(new_client,
+ FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
+ || (i2c_smbus_read_byte_data(new_client,
+ FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
+ goto exit_free;
+ }
+
+ /* Fill in the remaining client fields and put it into the
+ * global list */
+ strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
+ new_client->id = fscher_id++;
+ data->valid = 0;
+ init_MUTEX(&data->update_lock);
+
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(new_client)))
+ goto exit_free;
+
+ fscher_init_client(new_client);
+
+ /* Register sysfs hooks */
+ device_create_file_revision(new_client);
+ device_create_file_alarms(new_client);
+ device_create_file_control(new_client);
+ device_create_file_watchdog(new_client);
+
+ device_create_file_in(new_client, 0);
+ device_create_file_in(new_client, 1);
+ device_create_file_in(new_client, 2);
+
+ device_create_file_fan(new_client, 1);
+ device_create_file_fan(new_client, 2);
+ device_create_file_fan(new_client, 3);
+
+ device_create_file_temp(new_client, 1);
+ device_create_file_temp(new_client, 2);
+ device_create_file_temp(new_client, 3);
+
+ return 0;
+
+exit_free:
+ kfree(new_client);
+exit:
+ return err;
+}
+
+static int fscher_detach_client(struct i2c_client *client)
+{
+ int err;
+
+ if ((err = i2c_detach_client(client))) {
+ dev_err(&client->dev, "Client deregistration failed, "
+ "client not detached.\n");
+ return err;
+ }
+
+ kfree(client);
+ return 0;
+}
+
+static int fscher_read_value(struct i2c_client *client, u8 reg)
+{
+ dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
+
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
+{
+ dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
+ reg, value);
+
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/* Called when we have found a new FSC Hermes. */
+static void fscher_init_client(struct i2c_client *client)
+{
+ struct fscher_data *data = i2c_get_clientdata(client);
+
+ /* Read revision from chip */
+ data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
+}
+
+static void fscher_update_client(struct i2c_client *client)
+{
+ struct fscher_data *data = i2c_get_clientdata(client);
+
+ down(&data->update_lock);
+
+ if ((jiffies - data->last_updated > 2 * HZ) ||
+ (jiffies < data->last_updated) || !data->valid) {
+
+ dev_dbg(&client->dev, "Starting fscher update\n");
+
+ data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
+ data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
+ data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
+ data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
+ data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
+ data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
+
+ data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
+ data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
+ data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
+
+ data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
+ data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
+ data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
+ data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
+ data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
+ data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
+ data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
+ data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
+ data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
+ data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
+ data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
+ data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
+
+ data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
+ data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
+ data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
+
+ data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+}
+
+
+
+#define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
+
+static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ /* bits 0..1, 3..7 reserved => mask with 0x04 */
+ unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
+ data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
+
+ fscher_write_value(client, reg, v);
+ return count;
+}
+
+static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 0..1, 3..7 reserved => mask with 0x04 */
+ return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
+}
+
+static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ data->fan_min[FAN_INDEX_FROM_NUM(nr)] = simple_strtoul(buf, NULL, 10) & 0xff;
+
+ fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
+ return count;
+}
+
+static ssize_t show_pwm (struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
+}
+
+static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ /* supported values: 2, 4, 8 */
+ unsigned long v = simple_strtoul(buf, NULL, 10);
+
+ switch (v) {
+ case 2: v = 1; break;
+ case 4: v = 2; break;
+ case 8: v = 3; break;
+ default:
+ dev_err(&client->dev, "fan_div value %ld not "
+ "supported. Choose one of 2, 4 or 8!\n", v);
+ return -1;
+ }
+
+ /* bits 2..7 reserved => mask with 0x03 */
+ data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
+ data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
+
+ fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
+ return count;
+}
+
+static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 2..7 reserved => mask with 0x03 */
+ return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
+}
+
+#define RPM_FROM_REG(val) (val*60)
+
+static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
+}
+
+
+
+#define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
+
+static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ /* bits 2..7 reserved, 0 read only => mask with 0x02 */
+ unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
+ data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
+
+ fscher_write_value(client, reg, v);
+ return count;
+}
+
+static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 2..7 reserved => mask with 0x03 */
+ return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
+}
+
+#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
+
+static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
+}
+
+/*
+ * The final conversion is specified in sensors.conf, as it depends on
+ * mainboard specific values. We export the registers contents as
+ * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
+ * sense per se, but it minimizes the conversions count and keeps the
+ * values within a usual range.
+ */
+#define VOLT_FROM_REG(val) ((val) * 10)
+
+static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
+}
+
+
+
+static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%u\n", data->revision);
+}
+
+
+
+static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 2, 5..6 reserved => mask with 0x9b */
+ return sprintf(buf, "%u\n", data->global_event & 0x9b);
+}
+
+
+
+static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ /* bits 1..7 reserved => mask with 0x01 */
+ unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
+ data->global_control &= ~v;
+
+ fscher_write_value(client, reg, v);
+ return count;
+}
+
+static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 1..7 reserved => mask with 0x01 */
+ return sprintf(buf, "%u\n", data->global_control & 0x01);
+}
+
+
+
+static ssize_t set_watchdog_control(struct i2c_client *client, struct
+ fscher_data *data, const char *buf, size_t count,
+ int nr, int reg)
+{
+ /* bits 0..3 reserved => mask with 0xf0 */
+ unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
+ data->watchdog[2] &= ~0xf0;
+ data->watchdog[2] |= v;
+
+ fscher_write_value(client, reg, data->watchdog[2]);
+ return count;
+}
+
+static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
+ return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
+}
+
+static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ /* bits 0, 2..7 reserved => mask with 0x02 */
+ unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
+ data->watchdog[1] &= ~v;
+
+ fscher_write_value(client, reg, v);
+ return count;
+}
+
+static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
+{
+ /* bits 0, 2..7 reserved => mask with 0x02 */
+ return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
+}
+
+static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
+ const char *buf, size_t count, int nr, int reg)
+{
+ data->watchdog[0] = simple_strtoul(buf, NULL, 10) & 0xff;
+
+ fscher_write_value(client, reg, data->watchdog[0]);
+ return count;
+}
+
+static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
+{
+ return sprintf(buf, "%u\n", data->watchdog[0]);
+}
+
+static int __init sensors_fscher_init(void)
+{
+ return i2c_add_driver(&fscher_driver);
+}
+
+static void __exit sensors_fscher_exit(void)
+{
+ i2c_del_driver(&fscher_driver);
+}
+
+MODULE_AUTHOR("Reinhard Nissl <rnissl at gmx.de>");
+MODULE_DESCRIPTION("FSC Hermes driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_fscher_init);
+module_exit(sensors_fscher_exit);
diff -Nru a/include/linux/i2c-id.h b/include/linux/i2c-id.h
--- a/include/linux/i2c-id.h Mon Feb 9 15:05:36 2004
+++ b/include/linux/i2c-id.h Mon Feb 9 15:05:36 2004
@@ -156,6 +156,7 @@
#define I2C_DRIVERID_LM83 1040
#define I2C_DRIVERID_LM90 1042
#define I2C_DRIVERID_ASB100 1043
+#define I2C_DRIVERID_FSCHER 1046
#define I2C_DRIVERID_W83L785TS 1047
/*
