Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 692 insertions, 0 deletions

diff --git a/drivers/i2c/chips/fscher.c b/drivers/i2c/chips/fscher.c
new file mode 100644
index 000000000000..18e33ac59d0c
--- /dev/null
+++ b/drivers/i2c/chips/fscher.c
@@ -0,0 +1,692 @@
+/*
+ * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@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@odn.de>
+ *  Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
+ *  and Philip Edelbrock <phil@netroedge.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+
+/*
+ * Addresses to scan
+ */
+
+static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
+static unsigned int normal_isa[] = { 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 struct fscher_data *fscher_update_device(struct device *dev);
+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 i2c_client client;
+        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 */
+};
+
+/*
+ * Sysfs stuff
+ */
+
+#define sysfs_r(kind, sub, offset, reg) \
+static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
+static ssize_t show_##kind##offset##sub (struct device *, char *); \
+static ssize_t show_##kind##offset##sub (struct device *dev, char *buf) \
+{ \
+        struct fscher_data *data = fscher_update_device(dev); \
+        return show_##kind##sub(data, buf, (offset)); \
+}
+
+#define sysfs_w(kind, sub, offset, reg) \
+static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
+static ssize_t set_##kind##offset##sub (struct device *, const char *, size_t); \
+static ssize_t set_##kind##offset##sub (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##sub(client, data, buf, count, (offset), reg); \
+}
+
+#define sysfs_rw_n(kind, sub, offset, reg) \
+sysfs_r(kind, sub, offset, reg) \
+sysfs_w(kind, sub, offset, reg) \
+static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
+
+#define sysfs_rw(kind, sub, reg) \
+sysfs_r(kind, sub, 0, reg) \
+sysfs_w(kind, sub, 0, reg) \
+static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
+
+#define sysfs_ro_n(kind, sub, offset, reg) \
+sysfs_r(kind, sub, offset, reg) \
+static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
+
+#define sysfs_ro(kind, sub, reg) \
+sysfs_r(kind, sub, 0, reg) \
+static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, 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##offset##_status); \
+        device_create_file(&client->dev, &dev_attr_pwm##offset); \
+        device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
+        device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
+} while (0)
+
+#define device_create_file_temp(client, offset) \
+do { \
+        device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
+        device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
+} while (0)
+
+#define device_create_file_in(client, offset) \
+do { \
+        device_create_file(&client->dev, &dev_attr_in##offset##_input); \
+} 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_CLASS_HWMON))
+                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 (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
+                err = -ENOMEM;
+                goto exit;
+        }
+        memset(data, 0, sizeof(struct fscher_data));
+
+        /* The common I2C client data is placed right before the
+         * Hermes-specific data. */
+        new_client = &data->client;
+        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);
+        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(data);
+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(i2c_get_clientdata(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 struct fscher_data *fscher_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct fscher_data *data = i2c_get_clientdata(client);
+
+        down(&data->update_lock);
+
+        if (time_after(jiffies, data->last_updated + 2 * HZ) || !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);
+
+        return data;
+}
+
+
+
+#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;
+        
+        down(&data->update_lock);
+        data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
+        fscher_write_value(client, reg, v);
+        up(&data->update_lock);
+        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)
+{
+        unsigned long v = simple_strtoul(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
+        fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
+        up(&data->update_lock);
+        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 -EINVAL;
+        }
+
+        down(&data->update_lock);
+
+        /* 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)]);
+        up(&data->update_lock);
+        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;
+
+        down(&data->update_lock);
+        data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
+        fscher_write_value(client, reg, v);
+        up(&data->update_lock);
+        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;
+
+        down(&data->update_lock);
+        data->global_control &= ~v;
+        fscher_write_value(client, reg, v);
+        up(&data->update_lock);
+        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;
+
+        down(&data->update_lock);
+        data->watchdog[2] &= ~0xf0;
+        data->watchdog[2] |= v;
+        fscher_write_value(client, reg, data->watchdog[2]);
+        up(&data->update_lock);
+        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;
+
+        down(&data->update_lock);
+        data->watchdog[1] &= ~v;
+        fscher_write_value(client, reg, v);
+        up(&data->update_lock);
+        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)
+{
+        unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
+        
+        down(&data->update_lock);
+        data->watchdog[0] = v;
+        fscher_write_value(client, reg, data->watchdog[0]);
+        up(&data->update_lock);
+        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@gmx.de>");
+MODULE_DESCRIPTION("FSC Hermes driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_fscher_init);
+module_exit(sensors_fscher_exit);