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    Subject[PATCH] I2C: add GL520SM Sensor Chip driver
    Date
    From
    ChangeSet 1.2101, 2005/03/02 12:17:46-08:00, maartendeprez@scarlet.be

    [PATCH] I2C: add GL520SM Sensor Chip driver

    Port of the Genesys Logic 520SM sensor chip driver from linux 2.4

    Signed-off-by: Maarten Deprez <maartendeprez@users.sourceforge.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>


    drivers/i2c/chips/Kconfig | 11
    drivers/i2c/chips/Makefile | 1
    drivers/i2c/chips/gl520sm.c | 754 ++++++++++++++++++++++++++++++++++++++++++++
    3 files changed, 766 insertions(+)


    diff -Nru a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
    --- a/drivers/i2c/chips/Kconfig 2005-03-04 12:24:23 -08:00
    +++ b/drivers/i2c/chips/Kconfig 2005-03-04 12:24:23 -08:00
    @@ -106,6 +106,17 @@
    This driver can also be built as a module. If so, the module
    will be called gl518sm.

    +config SENSORS_GL520SM
    + tristate "Genesys Logic GL520SM"
    + depends on I2C && EXPERIMENTAL
    + select I2C_SENSOR
    + help
    + If you say yes here you get support for Genesys Logic GL520SM
    + sensor chips.
    +
    + This driver can also be built as a module. If so, the module
    + will be called gl520sm.
    +
    config SENSORS_IT87
    tristate "ITE IT87xx and compatibles"
    depends on I2C && EXPERIMENTAL
    diff -Nru a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
    --- a/drivers/i2c/chips/Makefile 2005-03-04 12:24:23 -08:00
    +++ b/drivers/i2c/chips/Makefile 2005-03-04 12:24:23 -08:00
    @@ -16,6 +16,7 @@
    obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
    obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
    obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
    +obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
    obj-$(CONFIG_SENSORS_IT87) += it87.o
    obj-$(CONFIG_SENSORS_LM63) += lm63.o
    obj-$(CONFIG_SENSORS_LM75) += lm75.o
    diff -Nru a/drivers/i2c/chips/gl520sm.c b/drivers/i2c/chips/gl520sm.c
    --- /dev/null Wed Dec 31 16:00:00 196900
    +++ b/drivers/i2c/chips/gl520sm.c 2005-03-04 12:24:23 -08:00
    @@ -0,0 +1,754 @@
    +/*
    + gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
    + monitoring
    + Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
    + Kyösti Mälkki <kmalkki@cc.hut.fi>
    + Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
    +
    + 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.
    +
    +*/
    +
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/slab.h>
    +#include <linux/i2c.h>
    +#include <linux/i2c-sensor.h>
    +#include <linux/i2c-vid.h>
    +
    +/* Type of the extra sensor */
    +static unsigned short extra_sensor_type;
    +module_param(extra_sensor_type, ushort, 0);
    +MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
    +
    +/* Addresses to scan */
    +static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
    +static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
    +
    +/* Insmod parameters */
    +SENSORS_INSMOD_1(gl520sm);
    +
    +/* Many GL520 constants specified below
    +One of the inputs can be configured as either temp or voltage.
    +That's why _TEMP2 and _IN4 access the same register
    +*/
    +
    +/* The GL520 registers */
    +#define GL520_REG_CHIP_ID 0x00
    +#define GL520_REG_REVISION 0x01
    +#define GL520_REG_CONF 0x03
    +#define GL520_REG_MASK 0x11
    +
    +#define GL520_REG_VID_INPUT 0x02
    +
    +#define GL520_REG_IN0_INPUT 0x15
    +#define GL520_REG_IN0_LIMIT 0x0c
    +#define GL520_REG_IN0_MIN GL520_REG_IN0_LIMIT
    +#define GL520_REG_IN0_MAX GL520_REG_IN0_LIMIT
    +
    +#define GL520_REG_IN1_INPUT 0x14
    +#define GL520_REG_IN1_LIMIT 0x09
    +#define GL520_REG_IN1_MIN GL520_REG_IN1_LIMIT
    +#define GL520_REG_IN1_MAX GL520_REG_IN1_LIMIT
    +
    +#define GL520_REG_IN2_INPUT 0x13
    +#define GL520_REG_IN2_LIMIT 0x0a
    +#define GL520_REG_IN2_MIN GL520_REG_IN2_LIMIT
    +#define GL520_REG_IN2_MAX GL520_REG_IN2_LIMIT
    +
    +#define GL520_REG_IN3_INPUT 0x0d
    +#define GL520_REG_IN3_LIMIT 0x0b
    +#define GL520_REG_IN3_MIN GL520_REG_IN3_LIMIT
    +#define GL520_REG_IN3_MAX GL520_REG_IN3_LIMIT
    +
    +#define GL520_REG_IN4_INPUT 0x0e
    +#define GL520_REG_IN4_MAX 0x17
    +#define GL520_REG_IN4_MIN 0x18
    +
    +#define GL520_REG_TEMP1_INPUT 0x04
    +#define GL520_REG_TEMP1_MAX 0x05
    +#define GL520_REG_TEMP1_MAX_HYST 0x06
    +
    +#define GL520_REG_TEMP2_INPUT 0x0e
    +#define GL520_REG_TEMP2_MAX 0x17
    +#define GL520_REG_TEMP2_MAX_HYST 0x18
    +
    +#define GL520_REG_FAN_INPUT 0x07
    +#define GL520_REG_FAN_MIN 0x08
    +#define GL520_REG_FAN_DIV 0x0f
    +#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
    +
    +#define GL520_REG_ALARMS 0x12
    +#define GL520_REG_BEEP_MASK 0x10
    +#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
    +
    +/*
    + * Function declarations
    + */
    +
    +static int gl520_attach_adapter(struct i2c_adapter *adapter);
    +static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
    +static void gl520_init_client(struct i2c_client *client);
    +static int gl520_detach_client(struct i2c_client *client);
    +static int gl520_read_value(struct i2c_client *client, u8 reg);
    +static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
    +static struct gl520_data *gl520_update_device(struct device *dev);
    +
    +/* Driver data */
    +static struct i2c_driver gl520_driver = {
    + .owner = THIS_MODULE,
    + .name = "gl520sm",
    + .id = I2C_DRIVERID_GL520,
    + .flags = I2C_DF_NOTIFY,
    + .attach_adapter = gl520_attach_adapter,
    + .detach_client = gl520_detach_client,
    +};
    +
    +/* Client data */
    +struct gl520_data {
    + struct i2c_client client;
    + struct semaphore update_lock;
    + char valid; /* zero until the following fields are valid */
    + unsigned long last_updated; /* in jiffies */
    +
    + u8 vid;
    + u8 vrm;
    + u8 in_input[5]; /* [0] = VVD */
    + u8 in_min[5]; /* [0] = VDD */
    + u8 in_max[5]; /* [0] = VDD */
    + u8 fan_input[2];
    + u8 fan_min[2];
    + u8 fan_div[2];
    + u8 fan_off;
    + u8 temp_input[2];
    + u8 temp_max[2];
    + u8 temp_max_hyst[2];
    + u8 alarms;
    + u8 beep_enable;
    + u8 beep_mask;
    + u8 alarm_mask;
    + u8 two_temps;
    +};
    +
    +/*
    + * Sysfs stuff
    + */
    +
    +#define sysfs_r(type, n, item, reg) \
    +static ssize_t get_##type##item (struct gl520_data *, char *, int); \
    +static ssize_t get_##type##n##item (struct device *, char *); \
    +static ssize_t get_##type##n##item (struct device *dev, char *buf) \
    +{ \
    + struct gl520_data *data = gl520_update_device(dev); \
    + return get_##type##item(data, buf, (n)); \
    +}
    +
    +#define sysfs_w(type, n, item, reg) \
    +static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
    +static ssize_t set_##type##n##item (struct device *, const char *, size_t); \
    +static ssize_t set_##type##n##item (struct device *dev, const char *buf, size_t count) \
    +{ \
    + struct i2c_client *client = to_i2c_client(dev); \
    + struct gl520_data *data = i2c_get_clientdata(client); \
    + return set_##type##item(client, data, buf, count, (n), reg); \
    +}
    +
    +#define sysfs_rw_n(type, n, item, reg) \
    +sysfs_r(type, n, item, reg) \
    +sysfs_w(type, n, item, reg) \
    +static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
    +
    +#define sysfs_ro_n(type, n, item, reg) \
    +sysfs_r(type, n, item, reg) \
    +static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
    +
    +#define sysfs_rw(type, item, reg) \
    +sysfs_r(type, 0, item, reg) \
    +sysfs_w(type, 0, item, reg) \
    +static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
    +
    +#define sysfs_ro(type, item, reg) \
    +sysfs_r(type, 0, item, reg) \
    +static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
    +
    +
    +#define sysfs_vid(n) \
    +sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
    +
    +#define device_create_file_vid(client, n) \
    +device_create_file(&client->dev, &dev_attr_cpu##n##_vid)
    +
    +#define sysfs_in(n) \
    +sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
    +sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
    +sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \
    +
    +#define device_create_file_in(client, n) \
    +({device_create_file(&client->dev, &dev_attr_in##n##_input); \
    +device_create_file(&client->dev, &dev_attr_in##n##_min); \
    +device_create_file(&client->dev, &dev_attr_in##n##_max);})
    +
    +#define sysfs_fan(n) \
    +sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
    +sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
    +sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
    +
    +#define device_create_file_fan(client, n) \
    +({device_create_file(&client->dev, &dev_attr_fan##n##_input); \
    +device_create_file(&client->dev, &dev_attr_fan##n##_min); \
    +device_create_file(&client->dev, &dev_attr_fan##n##_div);})
    +
    +#define sysfs_fan_off(n) \
    +sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
    +
    +#define device_create_file_fan_off(client, n) \
    +device_create_file(&client->dev, &dev_attr_fan##n##_off)
    +
    +#define sysfs_temp(n) \
    +sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
    +sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
    +sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
    +
    +#define device_create_file_temp(client, n) \
    +({device_create_file(&client->dev, &dev_attr_temp##n##_input); \
    +device_create_file(&client->dev, &dev_attr_temp##n##_max); \
    +device_create_file(&client->dev, &dev_attr_temp##n##_max_hyst);})
    +
    +#define sysfs_alarms() \
    +sysfs_ro(alarms, , GL520_REG_ALARMS) \
    +sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
    +sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
    +
    +#define device_create_file_alarms(client) \
    +({device_create_file(&client->dev, &dev_attr_alarms); \
    +device_create_file(&client->dev, &dev_attr_beep_enable); \
    +device_create_file(&client->dev, &dev_attr_beep_mask);})
    +
    +
    +sysfs_vid(0)
    +
    +sysfs_in(0)
    +sysfs_in(1)
    +sysfs_in(2)
    +sysfs_in(3)
    +sysfs_in(4)
    +
    +sysfs_fan(1)
    +sysfs_fan(2)
    +sysfs_fan_off(1)
    +
    +sysfs_temp(1)
    +sysfs_temp(2)
    +
    +sysfs_alarms()
    +
    +
    +static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
    +}
    +
    +#define VDD_FROM_REG(val) (((val)*95+2)/4)
    +#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
    +
    +#define IN_FROM_REG(val) ((val)*19)
    +#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
    +
    +static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
    +{
    + u8 r = data->in_input[n];
    +
    + if (n == 0)
    + return sprintf(buf, "%d\n", VDD_FROM_REG(r));
    + else
    + return sprintf(buf, "%d\n", IN_FROM_REG(r));
    +}
    +
    +static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
    +{
    + u8 r = data->in_min[n];
    +
    + if (n == 0)
    + return sprintf(buf, "%d\n", VDD_FROM_REG(r));
    + else
    + return sprintf(buf, "%d\n", IN_FROM_REG(r));
    +}
    +
    +static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
    +{
    + u8 r = data->in_max[n];
    +
    + if (n == 0)
    + return sprintf(buf, "%d\n", VDD_FROM_REG(r));
    + else
    + return sprintf(buf, "%d\n", IN_FROM_REG(r));
    +}
    +
    +static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + long v = simple_strtol(buf, NULL, 10);
    + u8 r;
    +
    + if (n == 0)
    + r = VDD_TO_REG(v);
    + else
    + r = IN_TO_REG(v);
    +
    + data->in_min[n] = r;
    +
    + if (n < 4)
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
    + else
    + gl520_write_value(client, reg, r);
    +
    + return count;
    +}
    +
    +static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + long v = simple_strtol(buf, NULL, 10);
    + u8 r;
    +
    + if (n == 0)
    + r = VDD_TO_REG(v);
    + else
    + r = IN_TO_REG(v);
    +
    + data->in_max[n] = r;
    +
    + if (n < 4)
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
    + else
    + gl520_write_value(client, reg, r);
    +
    + return count;
    +}
    +
    +#define DIV_FROM_REG(val) (1 << (val))
    +#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
    +#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
    +
    +static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
    +}
    +
    +static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
    +}
    +
    +static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
    +}
    +
    +static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", data->fan_off);
    +}
    +
    +static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + unsigned long v = simple_strtoul(buf, NULL, 10);
    + u8 r = FAN_TO_REG(v, data->fan_div[n - 1]);
    +
    + data->fan_min[n - 1] = r;
    +
    + if (n == 1)
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
    + else
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
    +
    + data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
    + if (data->fan_min[n - 1] == 0)
    + data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
    + else
    + data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
    + data->beep_mask &= data->alarm_mask;
    + gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
    +
    + return count;
    +}
    +
    +static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + unsigned long v = simple_strtoul(buf, NULL, 10);
    + u8 r;
    +
    + switch (v) {
    + case 1: r = 0; break;
    + case 2: r = 1; break;
    + case 4: r = 2; break;
    + case 8: r = 3; break;
    + default:
    + dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
    + return -EINVAL;
    + }
    +
    + data->fan_div[n - 1] = r;
    +
    + if (n == 1)
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
    + else
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
    +
    + return count;
    +}
    +
    +static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + u8 r = simple_strtoul(buf, NULL, 10)?1:0;
    +
    + data->fan_off = r;
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
    +
    + return count;
    +}
    +
    +#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
    +#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
    +
    +static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
    +}
    +
    +static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
    +}
    +
    +static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
    +}
    +
    +static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + long v = simple_strtol(buf, NULL, 10);
    + u8 r = TEMP_TO_REG(v);
    +
    + data->temp_max[n - 1] = r;
    + gl520_write_value(client, reg, r);
    +
    + return count;
    +}
    +
    +static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + long v = simple_strtol(buf, NULL, 10);
    + u8 r = TEMP_TO_REG(v);
    +
    + data->temp_max_hyst[n - 1] = r;
    + gl520_write_value(client, reg, r);
    +
    + return count;
    +}
    +
    +static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", data->alarms);
    +}
    +
    +static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", data->beep_enable);
    +}
    +
    +static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
    +{
    + return sprintf(buf, "%d\n", data->beep_mask);
    +}
    +
    +static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + u8 r = simple_strtoul(buf, NULL, 10)?0:1;
    +
    + data->beep_enable = !r;
    + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
    +
    + return count;
    +}
    +
    +static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
    +{
    + u8 r = simple_strtoul(buf, NULL, 10) & data->alarm_mask;
    +
    + data->beep_mask = r;
    + gl520_write_value(client, reg, r);
    +
    + return count;
    +}
    +
    +
    +/*
    + * Real code
    + */
    +
    +static int gl520_attach_adapter(struct i2c_adapter *adapter)
    +{
    + if (!(adapter->class & I2C_CLASS_HWMON))
    + return 0;
    + return i2c_detect(adapter, &addr_data, gl520_detect);
    +}
    +
    +static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
    +{
    + struct i2c_client *new_client;
    + struct gl520_data *data;
    + int err = 0;
    +
    + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
    + I2C_FUNC_SMBUS_WORD_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 gl520_{read,write}_value. */
    +
    + if (!(data = kmalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
    + err = -ENOMEM;
    + goto exit;
    + }
    + memset(data, 0, sizeof(struct gl520_data));
    +
    + new_client = &data->client;
    + i2c_set_clientdata(new_client, data);
    + new_client->addr = address;
    + new_client->adapter = adapter;
    + new_client->driver = &gl520_driver;
    + new_client->flags = 0;
    +
    + /* Determine the chip type. */
    + if (kind < 0) {
    + if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
    + ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
    + ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
    + dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
    + goto exit_free;
    + }
    + }
    +
    + /* Fill in the remaining client fields */
    + strlcpy(new_client->name, "gl520sm", 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;
    +
    + /* Initialize the GL520SM chip */
    + gl520_init_client(new_client);
    +
    + /* Register sysfs hooks */
    + device_create_file_vid(new_client, 0);
    +
    + device_create_file_in(new_client, 0);
    + device_create_file_in(new_client, 1);
    + device_create_file_in(new_client, 2);
    + device_create_file_in(new_client, 3);
    + if (!data->two_temps)
    + device_create_file_in(new_client, 4);
    +
    + device_create_file_fan(new_client, 1);
    + device_create_file_fan(new_client, 2);
    + device_create_file_fan_off(new_client, 1);
    +
    + device_create_file_temp(new_client, 1);
    + if (data->two_temps)
    + device_create_file_temp(new_client, 2);
    +
    + device_create_file_alarms(new_client);
    +
    + return 0;
    +
    +exit_free:
    + kfree(data);
    +exit:
    + return err;
    +}
    +
    +
    +/* Called when we have found a new GL520SM. */
    +static void gl520_init_client(struct i2c_client *client)
    +{
    + struct gl520_data *data = i2c_get_clientdata(client);
    + u8 oldconf, conf;
    +
    + conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
    +
    + data->alarm_mask = 0xff;
    + data->vrm = i2c_which_vrm();
    +
    + if (extra_sensor_type == 1)
    + conf &= ~0x10;
    + else if (extra_sensor_type == 2)
    + conf |= 0x10;
    + data->two_temps = !(conf & 0x10);
    +
    + /* If IRQ# is disabled, we can safely force comparator mode */
    + if (!(conf & 0x20))
    + conf &= 0xf7;
    +
    + /* Enable monitoring if needed */
    + conf |= 0x40;
    +
    + if (conf != oldconf)
    + gl520_write_value(client, GL520_REG_CONF, conf);
    +
    + gl520_update_device(&(client->dev));
    +
    + if (data->fan_min[0] == 0)
    + data->alarm_mask &= ~0x20;
    + if (data->fan_min[1] == 0)
    + data->alarm_mask &= ~0x40;
    +
    + data->beep_mask &= data->alarm_mask;
    + gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
    +}
    +
    +static int gl520_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;
    +}
    +
    +
    +/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
    + GL520 uses a high-byte first convention */
    +static int gl520_read_value(struct i2c_client *client, u8 reg)
    +{
    + if ((reg >= 0x07) && (reg <= 0x0c))
    + return swab16(i2c_smbus_read_word_data(client, reg));
    + else
    + return i2c_smbus_read_byte_data(client, reg);
    +}
    +
    +static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
    +{
    + if ((reg >= 0x07) && (reg <= 0x0c))
    + return i2c_smbus_write_word_data(client, reg, swab16(value));
    + else
    + return i2c_smbus_write_byte_data(client, reg, value);
    +}
    +
    +
    +static struct gl520_data *gl520_update_device(struct device *dev)
    +{
    + struct i2c_client *client = to_i2c_client(dev);
    + struct gl520_data *data = i2c_get_clientdata(client);
    + int val;
    +
    + down(&data->update_lock);
    +
    + if ((jiffies - data->last_updated > 2 * HZ) ||
    + (jiffies < data->last_updated) || !data->valid) {
    +
    + dev_dbg(&client->dev, "Starting gl520sm update\n");
    +
    + data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
    + data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
    + data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
    +
    + val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
    + data->in_min[0] = val & 0xff;
    + data->in_max[0] = (val >> 8) & 0xff;
    + val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
    + data->in_min[1] = val & 0xff;
    + data->in_max[1] = (val >> 8) & 0xff;
    + val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
    + data->in_min[2] = val & 0xff;
    + data->in_max[2] = (val >> 8) & 0xff;
    + val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
    + data->in_min[3] = val & 0xff;
    + data->in_max[3] = (val >> 8) & 0xff;
    +
    + val = gl520_read_value(client, GL520_REG_FAN_INPUT);
    + data->fan_input[0] = (val >> 8) & 0xff;
    + data->fan_input[1] = val & 0xff;
    +
    + val = gl520_read_value(client, GL520_REG_FAN_MIN);
    + data->fan_min[0] = (val >> 8) & 0xff;
    + data->fan_min[1] = val & 0xff;
    +
    + data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
    + data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
    + data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
    +
    + val = gl520_read_value(client, GL520_REG_FAN_DIV);
    + data->fan_div[0] = (val >> 6) & 0x03;
    + data->fan_div[1] = (val >> 4) & 0x03;
    + data->fan_off = (val >> 2) & 0x01;
    +
    + data->alarms &= data->alarm_mask;
    +
    + val = gl520_read_value(client, GL520_REG_CONF);
    + data->beep_enable = !((val >> 2) & 1);
    +
    + data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
    + data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
    + data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
    + data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
    +
    + /* Temp1 and Vin4 are the same input */
    + if (data->two_temps) {
    + data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
    + data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
    + data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
    + } else {
    + data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
    + data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
    + data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
    + }
    +
    + data->last_updated = jiffies;
    + data->valid = 1;
    + }
    +
    + up(&data->update_lock);
    +
    + return data;
    +}
    +
    +
    +static int __init sensors_gl520sm_init(void)
    +{
    + return i2c_add_driver(&gl520_driver);
    +}
    +
    +static void __exit sensors_gl520sm_exit(void)
    +{
    + i2c_del_driver(&gl520_driver);
    +}
    +
    +
    +MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
    + "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
    + "Maarten Deprez <maartendeprez@users.sourceforge.net>");
    +MODULE_DESCRIPTION("GL520SM driver");
    +MODULE_LICENSE("GPL");
    +
    +module_init(sensors_gl520sm_init);
    +module_exit(sensors_gl520sm_exit);
    -
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