diff options
Diffstat (limited to 'drivers/i2c/chips/fscher.c')
| -rw-r--r-- | drivers/i2c/chips/fscher.c | 692 |
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); |