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Diffstat (limited to 'kernel/drivers/hwmon/lm87.c')
| -rw-r--r-- | kernel/drivers/hwmon/lm87.c | 1019 |
1 files changed, 1019 insertions, 0 deletions
diff --git a/kernel/drivers/hwmon/lm87.c b/kernel/drivers/hwmon/lm87.c new file mode 100644 index 000000000..a5e295826 --- /dev/null +++ b/kernel/drivers/hwmon/lm87.c @@ -0,0 +1,1019 @@ +/* + * lm87.c + * + * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> + * Philip Edelbrock <phil@netroedge.com> + * Stephen Rousset <stephen.rousset@rocketlogix.com> + * Dan Eaton <dan.eaton@rocketlogix.com> + * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de> + * + * Original port to Linux 2.6 by Jeff Oliver. + * + * The LM87 is a sensor chip made by National Semiconductor. It monitors up + * to 8 voltages (including its own power source), up to three temperatures + * (its own plus up to two external ones) and up to two fans. The default + * configuration is 6 voltages, two temperatures and two fans (see below). + * Voltages are scaled internally with ratios such that the nominal value of + * each voltage correspond to a register value of 192 (which means a + * resolution of about 0.5% of the nominal value). Temperature values are + * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete + * datasheet can be obtained from National's website at: + * http://www.national.com/pf/LM/LM87.html + * + * Some functions share pins, so not all functions are available at the same + * time. Which are depends on the hardware setup. This driver normally + * assumes that firmware configured the chip correctly. Where this is not + * the case, platform code must set the I2C client's platform_data to point + * to a u8 value to be written to the channel register. + * For reference, here is the list of exclusive functions: + * - in0+in5 (default) or temp3 + * - fan1 (default) or in6 + * - fan2 (default) or in7 + * - VID lines (default) or IRQ lines (not handled by this driver) + * + * The LM87 additionally features an analog output, supposedly usable to + * control the speed of a fan. All new chips use pulse width modulation + * instead. The LM87 is the only hardware monitoring chipset I know of + * which uses amplitude modulation. Be careful when using this feature. + * + * This driver also supports the ADM1024, a sensor chip made by Analog + * Devices. That chip is fully compatible with the LM87. Complete + * datasheet can be obtained from Analog's website at: + * http://www.analog.com/en/prod/0,2877,ADM1024,00.html + * + * 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/jiffies.h> +#include <linux/i2c.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/hwmon-vid.h> +#include <linux/err.h> +#include <linux/mutex.h> + +/* + * Addresses to scan + * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. + */ + +static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; + +enum chips { lm87, adm1024 }; + +/* + * The LM87 registers + */ + +/* nr in 0..5 */ +#define LM87_REG_IN(nr) (0x20 + (nr)) +#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) +#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) +/* nr in 0..1 */ +#define LM87_REG_AIN(nr) (0x28 + (nr)) +#define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) +#define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) + +static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; +static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; +static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; + +#define LM87_REG_TEMP_HW_INT_LOCK 0x13 +#define LM87_REG_TEMP_HW_EXT_LOCK 0x14 +#define LM87_REG_TEMP_HW_INT 0x17 +#define LM87_REG_TEMP_HW_EXT 0x18 + +/* nr in 0..1 */ +#define LM87_REG_FAN(nr) (0x28 + (nr)) +#define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) +#define LM87_REG_AOUT 0x19 + +#define LM87_REG_CONFIG 0x40 +#define LM87_REG_CHANNEL_MODE 0x16 +#define LM87_REG_VID_FAN_DIV 0x47 +#define LM87_REG_VID4 0x49 + +#define LM87_REG_ALARMS1 0x41 +#define LM87_REG_ALARMS2 0x42 + +#define LM87_REG_COMPANY_ID 0x3E +#define LM87_REG_REVISION 0x3F + +/* + * Conversions and various macros + * The LM87 uses signed 8-bit values for temperatures. + */ + +#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) +#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ + (val) * 192 >= (scale) * 255 ? 255 : \ + ((val) * 192 + (scale) / 2) / (scale)) + +#define TEMP_FROM_REG(reg) ((reg) * 1000) +#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ + (val) >= 126500 ? 127 : \ + (((val) < 0 ? (val) - 500 : \ + (val) + 500) / 1000)) + +#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \ + (1350000 + (reg)*(div) / 2) / ((reg) * (div))) +#define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \ + (1350000 + (val)*(div) / 2) / ((val) * (div))) + +#define FAN_DIV_FROM_REG(reg) (1 << (reg)) + +/* analog out is 9.80mV/LSB */ +#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) +#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ + (val) >= 2500 ? 255 : \ + ((val) * 10 + 49) / 98) + +/* nr in 0..1 */ +#define CHAN_NO_FAN(nr) (1 << (nr)) +#define CHAN_TEMP3 (1 << 2) +#define CHAN_VCC_5V (1 << 3) +#define CHAN_NO_VID (1 << 7) + +/* + * Client data (each client gets its own) + */ + +struct lm87_data { + struct device *hwmon_dev; + struct mutex update_lock; + char valid; /* zero until following fields are valid */ + unsigned long last_updated; /* In jiffies */ + + u8 channel; /* register value */ + u8 config; /* original register value */ + + u8 in[8]; /* register value */ + u8 in_max[8]; /* register value */ + u8 in_min[8]; /* register value */ + u16 in_scale[8]; + + s8 temp[3]; /* register value */ + s8 temp_high[3]; /* register value */ + s8 temp_low[3]; /* register value */ + s8 temp_crit_int; /* min of two register values */ + s8 temp_crit_ext; /* min of two register values */ + + u8 fan[2]; /* register value */ + u8 fan_min[2]; /* register value */ + u8 fan_div[2]; /* register value, shifted right */ + u8 aout; /* register value */ + + u16 alarms; /* register values, combined */ + u8 vid; /* register values, combined */ + u8 vrm; +}; + +static inline int lm87_read_value(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} + +static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} + +static struct lm87_data *lm87_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + int i, j; + + dev_dbg(&client->dev, "Updating data.\n"); + + i = (data->channel & CHAN_TEMP3) ? 1 : 0; + j = (data->channel & CHAN_TEMP3) ? 5 : 6; + for (; i < j; i++) { + data->in[i] = lm87_read_value(client, + LM87_REG_IN(i)); + data->in_min[i] = lm87_read_value(client, + LM87_REG_IN_MIN(i)); + data->in_max[i] = lm87_read_value(client, + LM87_REG_IN_MAX(i)); + } + + for (i = 0; i < 2; i++) { + if (data->channel & CHAN_NO_FAN(i)) { + data->in[6+i] = lm87_read_value(client, + LM87_REG_AIN(i)); + data->in_max[6+i] = lm87_read_value(client, + LM87_REG_AIN_MAX(i)); + data->in_min[6+i] = lm87_read_value(client, + LM87_REG_AIN_MIN(i)); + + } else { + data->fan[i] = lm87_read_value(client, + LM87_REG_FAN(i)); + data->fan_min[i] = lm87_read_value(client, + LM87_REG_FAN_MIN(i)); + } + } + + j = (data->channel & CHAN_TEMP3) ? 3 : 2; + for (i = 0 ; i < j; i++) { + data->temp[i] = lm87_read_value(client, + LM87_REG_TEMP[i]); + data->temp_high[i] = lm87_read_value(client, + LM87_REG_TEMP_HIGH[i]); + data->temp_low[i] = lm87_read_value(client, + LM87_REG_TEMP_LOW[i]); + } + + i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); + j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); + data->temp_crit_int = min(i, j); + + i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); + j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); + data->temp_crit_ext = min(i, j); + + i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); + data->fan_div[0] = (i >> 4) & 0x03; + data->fan_div[1] = (i >> 6) & 0x03; + data->vid = (i & 0x0F) + | (lm87_read_value(client, LM87_REG_VID4) & 0x01) + << 4; + + data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) + | (lm87_read_value(client, LM87_REG_ALARMS2) + << 8); + data->aout = lm87_read_value(client, LM87_REG_AOUT); + + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +/* + * Sysfs stuff + */ + +static ssize_t show_in_input(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr], + data->in_scale[nr])); +} + +static ssize_t show_in_min(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr], + data->in_scale[nr])); +} + +static ssize_t show_in_max(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr], + data->in_scale[nr])); +} + +static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); + lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) : + LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); + lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) : + LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +#define set_in(offset) \ +static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ + show_in_input, NULL, offset); \ +static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ + show_in_min, set_in_min, offset); \ +static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ + show_in_max, set_in_max, offset) +set_in(0); +set_in(1); +set_in(2); +set_in(3); +set_in(4); +set_in(5); +set_in(6); +set_in(7); + +static ssize_t show_temp_input(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); +} + +static ssize_t show_temp_low(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", + TEMP_FROM_REG(data->temp_low[nr])); +} + +static ssize_t show_temp_high(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", + TEMP_FROM_REG(data->temp_high[nr])); +} + +static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->temp_low[nr] = TEMP_TO_REG(val); + lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->temp_high[nr] = TEMP_TO_REG(val); + lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +#define set_temp(offset) \ +static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ + show_temp_input, NULL, offset - 1); \ +static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ + show_temp_high, set_temp_high, offset - 1); \ +static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ + show_temp_low, set_temp_low, offset - 1) +set_temp(1); +set_temp(2); +set_temp(3); + +static ssize_t show_temp_crit_int(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); +} + +static ssize_t show_temp_crit_ext(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); +} + +static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); +static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); +static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); + +static ssize_t show_fan_input(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], + FAN_DIV_FROM_REG(data->fan_div[nr]))); +} + +static ssize_t show_fan_min(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], + FAN_DIV_FROM_REG(data->fan_div[nr]))); +} + +static ssize_t show_fan_div(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int nr = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", + FAN_DIV_FROM_REG(data->fan_div[nr])); +} + +static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->fan_min[nr] = FAN_TO_REG(val, + FAN_DIV_FROM_REG(data->fan_div[nr])); + lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +/* + * Note: we save and restore the fan minimum here, because its value is + * determined in part by the fan clock divider. This follows the principle + * of least surprise; the user doesn't expect the fan minimum to change just + * because the divider changed. + */ +static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + int nr = to_sensor_dev_attr(attr)->index; + long val; + int err; + unsigned long min; + u8 reg; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + min = FAN_FROM_REG(data->fan_min[nr], + FAN_DIV_FROM_REG(data->fan_div[nr])); + + switch (val) { + case 1: + data->fan_div[nr] = 0; + break; + case 2: + data->fan_div[nr] = 1; + break; + case 4: + data->fan_div[nr] = 2; + break; + case 8: + data->fan_div[nr] = 3; + break; + default: + mutex_unlock(&data->update_lock); + return -EINVAL; + } + + reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); + switch (nr) { + case 0: + reg = (reg & 0xCF) | (data->fan_div[0] << 4); + break; + case 1: + reg = (reg & 0x3F) | (data->fan_div[1] << 6); + break; + } + lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); + + data->fan_min[nr] = FAN_TO_REG(min, val); + lm87_write_value(client, LM87_REG_FAN_MIN(nr), + data->fan_min[nr]); + mutex_unlock(&data->update_lock); + + return count; +} + +#define set_fan(offset) \ +static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ + show_fan_input, NULL, offset - 1); \ +static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ + show_fan_min, set_fan_min, offset - 1); \ +static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ + show_fan_div, set_fan_div, offset - 1) +set_fan(1); +set_fan(2); + +static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + return sprintf(buf, "%d\n", data->alarms); +} +static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); + +static ssize_t show_vid(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); +} +static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); + +static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", data->vrm); +} +static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm87_data *data = dev_get_drvdata(dev); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + if (val > 255) + return -EINVAL; + + data->vrm = val; + return count; +} +static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); + +static ssize_t show_aout(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); +} +static ssize_t set_aout(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lm87_data *data = i2c_get_clientdata(client); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->aout = AOUT_TO_REG(val); + lm87_write_value(client, LM87_REG_AOUT, data->aout); + mutex_unlock(&data->update_lock); + return count; +} +static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); + +static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm87_data *data = lm87_update_device(dev); + int bitnr = to_sensor_dev_attr(attr)->index; + return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); +} +static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); +static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); +static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); +static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); + +/* + * Real code + */ + +static struct attribute *lm87_attributes[] = { + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &dev_attr_temp1_crit.attr, + &sensor_dev_attr_temp1_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &dev_attr_temp2_crit.attr, + &sensor_dev_attr_temp2_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + + &dev_attr_alarms.attr, + &dev_attr_aout_output.attr, + + NULL +}; + +static const struct attribute_group lm87_group = { + .attrs = lm87_attributes, +}; + +static struct attribute *lm87_attributes_in6[] = { + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in6_min.dev_attr.attr, + &sensor_dev_attr_in6_max.dev_attr.attr, + &sensor_dev_attr_in6_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_in6 = { + .attrs = lm87_attributes_in6, +}; + +static struct attribute *lm87_attributes_fan1[] = { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan1_div.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_fan1 = { + .attrs = lm87_attributes_fan1, +}; + +static struct attribute *lm87_attributes_in7[] = { + &sensor_dev_attr_in7_input.dev_attr.attr, + &sensor_dev_attr_in7_min.dev_attr.attr, + &sensor_dev_attr_in7_max.dev_attr.attr, + &sensor_dev_attr_in7_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_in7 = { + .attrs = lm87_attributes_in7, +}; + +static struct attribute *lm87_attributes_fan2[] = { + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan2_div.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_fan2 = { + .attrs = lm87_attributes_fan2, +}; + +static struct attribute *lm87_attributes_temp3[] = { + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &dev_attr_temp3_crit.attr, + &sensor_dev_attr_temp3_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_temp3 = { + .attrs = lm87_attributes_temp3, +}; + +static struct attribute *lm87_attributes_in0_5[] = { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in5_min.dev_attr.attr, + &sensor_dev_attr_in5_max.dev_attr.attr, + &sensor_dev_attr_in5_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm87_group_in0_5 = { + .attrs = lm87_attributes_in0_5, +}; + +static struct attribute *lm87_attributes_vid[] = { + &dev_attr_cpu0_vid.attr, + &dev_attr_vrm.attr, + NULL +}; + +static const struct attribute_group lm87_group_vid = { + .attrs = lm87_attributes_vid, +}; + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + const char *name; + u8 cid, rev; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80) + return -ENODEV; + + /* Now, we do the remaining detection. */ + cid = lm87_read_value(client, LM87_REG_COMPANY_ID); + rev = lm87_read_value(client, LM87_REG_REVISION); + + if (cid == 0x02 /* National Semiconductor */ + && (rev >= 0x01 && rev <= 0x08)) + name = "lm87"; + else if (cid == 0x41 /* Analog Devices */ + && (rev & 0xf0) == 0x10) + name = "adm1024"; + else { + dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n", + client->addr); + return -ENODEV; + } + + strlcpy(info->type, name, I2C_NAME_SIZE); + + return 0; +} + +static void lm87_remove_files(struct i2c_client *client) +{ + struct device *dev = &client->dev; + + sysfs_remove_group(&dev->kobj, &lm87_group); + sysfs_remove_group(&dev->kobj, &lm87_group_in6); + sysfs_remove_group(&dev->kobj, &lm87_group_fan1); + sysfs_remove_group(&dev->kobj, &lm87_group_in7); + sysfs_remove_group(&dev->kobj, &lm87_group_fan2); + sysfs_remove_group(&dev->kobj, &lm87_group_temp3); + sysfs_remove_group(&dev->kobj, &lm87_group_in0_5); + sysfs_remove_group(&dev->kobj, &lm87_group_vid); +} + +static void lm87_init_client(struct i2c_client *client) +{ + struct lm87_data *data = i2c_get_clientdata(client); + + if (dev_get_platdata(&client->dev)) { + data->channel = *(u8 *)dev_get_platdata(&client->dev); + lm87_write_value(client, + LM87_REG_CHANNEL_MODE, data->channel); + } else { + data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); + } + data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; + + if (!(data->config & 0x01)) { + int i; + + /* Limits are left uninitialized after power-up */ + for (i = 1; i < 6; i++) { + lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); + lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); + } + for (i = 0; i < 2; i++) { + lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); + lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); + lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); + lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); + } + if (data->channel & CHAN_TEMP3) { + lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); + lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); + } else { + lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); + lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); + } + } + + /* Make sure Start is set and INT#_Clear is clear */ + if ((data->config & 0x09) != 0x01) + lm87_write_value(client, LM87_REG_CONFIG, + (data->config & 0x77) | 0x01); +} + +static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct lm87_data *data; + int err; + + data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + + /* Initialize the LM87 chip */ + lm87_init_client(client); + + data->in_scale[0] = 2500; + data->in_scale[1] = 2700; + data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; + data->in_scale[3] = 5000; + data->in_scale[4] = 12000; + data->in_scale[5] = 2700; + data->in_scale[6] = 1875; + data->in_scale[7] = 1875; + + /* Register sysfs hooks */ + err = sysfs_create_group(&client->dev.kobj, &lm87_group); + if (err) + goto exit_stop; + + if (data->channel & CHAN_NO_FAN(0)) { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_in6); + if (err) + goto exit_remove; + } else { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan1); + if (err) + goto exit_remove; + } + + if (data->channel & CHAN_NO_FAN(1)) { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_in7); + if (err) + goto exit_remove; + } else { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan2); + if (err) + goto exit_remove; + } + + if (data->channel & CHAN_TEMP3) { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_temp3); + if (err) + goto exit_remove; + } else { + err = sysfs_create_group(&client->dev.kobj, &lm87_group_in0_5); + if (err) + goto exit_remove; + } + + if (!(data->channel & CHAN_NO_VID)) { + data->vrm = vid_which_vrm(); + err = sysfs_create_group(&client->dev.kobj, &lm87_group_vid); + if (err) + goto exit_remove; + } + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove; + } + + return 0; + +exit_remove: + lm87_remove_files(client); +exit_stop: + lm87_write_value(client, LM87_REG_CONFIG, data->config); + return err; +} + +static int lm87_remove(struct i2c_client *client) +{ + struct lm87_data *data = i2c_get_clientdata(client); + + hwmon_device_unregister(data->hwmon_dev); + lm87_remove_files(client); + + lm87_write_value(client, LM87_REG_CONFIG, data->config); + return 0; +} + +/* + * Driver data (common to all clients) + */ + +static const struct i2c_device_id lm87_id[] = { + { "lm87", lm87 }, + { "adm1024", adm1024 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm87_id); + +static struct i2c_driver lm87_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm87", + }, + .probe = lm87_probe, + .remove = lm87_remove, + .id_table = lm87_id, + .detect = lm87_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(lm87_driver); + +MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others"); +MODULE_DESCRIPTION("LM87 driver"); +MODULE_LICENSE("GPL"); |