diff options
Diffstat (limited to 'drivers/i2c/chips/gl520sm.c')
| -rw-r--r-- | drivers/i2c/chips/gl520sm.c | 769 |
1 files changed, 769 insertions, 0 deletions
diff --git a/drivers/i2c/chips/gl520sm.c b/drivers/i2c/chips/gl520sm.c new file mode 100644 index 000000000000..3fd17e46ffc6 --- /dev/null +++ b/drivers/i2c/chips/gl520sm.c @@ -0,0 +1,769 @@ +/* + 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; + + down(&data->update_lock); + + 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); + + up(&data->update_lock); + 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); + + down(&data->update_lock); + + 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); + + up(&data->update_lock); + 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; + + down(&data->update_lock); + 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); + + up(&data->update_lock); + 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; + } + + down(&data->update_lock); + 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)); + + up(&data->update_lock); + 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; + + down(&data->update_lock); + data->fan_off = r; + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2)); + up(&data->update_lock); + 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); + + down(&data->update_lock); + data->temp_max[n - 1] = TEMP_TO_REG(v);; + gl520_write_value(client, reg, data->temp_max[n - 1]); + up(&data->update_lock); + 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); + + down(&data->update_lock); + data->temp_max_hyst[n - 1] = TEMP_TO_REG(v); + gl520_write_value(client, reg, data->temp_max_hyst[n - 1]); + up(&data->update_lock); + 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; + + down(&data->update_lock); + data->beep_enable = !r; + gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2)); + up(&data->update_lock); + 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); + + down(&data->update_lock); + r &= data->alarm_mask; + data->beep_mask = r; + gl520_write_value(client, reg, r); + up(&data->update_lock); + 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); |