--- /dev/null
+/*
+ w83627ehf - Driver for the hardware monitoring functionality of
+ the Winbond W83627EHF Super-I/O chip
+ Copyright (C) 2005 Jean Delvare <khali@linux-fr.org>
+
+ Shamelessly ripped from the w83627hf driver
+ Copyright (C) 2003 Mark Studebaker
+
+ Thanks to Leon Moonen, Steve Cliffe and Grant Coady for their help
+ in testing and debugging this driver.
+
+ 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.
+
+
+ Supports the following chips:
+
+ Chip #vin #fan #pwm #temp chip_id man_id
+ w83627ehf - 5 - 3 0x88 0x5ca3
+
+ This is a preliminary version of the driver, only supporting the
+ fan and temperature inputs. The chip does much more than that.
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+#include <asm/io.h>
+#include "lm75.h"
+
+/* Addresses to scan
+ The actual ISA address is read from Super-I/O configuration space */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+static unsigned int normal_isa[] = { 0, I2C_CLIENT_ISA_END };
+
+/* Insmod parameters */
+SENSORS_INSMOD_1(w83627ehf);
+
+/*
+ * Super-I/O constants and functions
+ */
+
+static int REG; /* The register to read/write */
+static int VAL; /* The value to read/write */
+
+#define W83627EHF_LD_HWM 0x0b
+
+#define SIO_REG_LDSEL 0x07 /* Logical device select */
+#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
+#define SIO_REG_ENABLE 0x30 /* Logical device enable */
+#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
+
+#define SIO_W83627EHF_ID 0x8840
+#define SIO_ID_MASK 0xFFC0
+
+static inline void
+superio_outb(int reg, int val)
+{
+ outb(reg, REG);
+ outb(val, VAL);
+}
+
+static inline int
+superio_inb(int reg)
+{
+ outb(reg, REG);
+ return inb(VAL);
+}
+
+static inline void
+superio_select(int ld)
+{
+ outb(SIO_REG_LDSEL, REG);
+ outb(ld, VAL);
+}
+
+static inline void
+superio_enter(void)
+{
+ outb(0x87, REG);
+ outb(0x87, REG);
+}
+
+static inline void
+superio_exit(void)
+{
+ outb(0x02, REG);
+ outb(0x02, VAL);
+}
+
+/*
+ * ISA constants
+ */
+
+#define REGION_LENGTH 8
+#define ADDR_REG_OFFSET 5
+#define DATA_REG_OFFSET 6
+
+#define W83627EHF_REG_BANK 0x4E
+#define W83627EHF_REG_CONFIG 0x40
+#define W83627EHF_REG_CHIP_ID 0x49
+#define W83627EHF_REG_MAN_ID 0x4F
+
+static const u16 W83627EHF_REG_FAN[] = { 0x28, 0x29, 0x2a, 0x3f, 0x553 };
+static const u16 W83627EHF_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d, 0x3e, 0x55c };
+
+#define W83627EHF_REG_TEMP1 0x27
+#define W83627EHF_REG_TEMP1_HYST 0x3a
+#define W83627EHF_REG_TEMP1_OVER 0x39
+static const u16 W83627EHF_REG_TEMP[] = { 0x150, 0x250 };
+static const u16 W83627EHF_REG_TEMP_HYST[] = { 0x153, 0x253 };
+static const u16 W83627EHF_REG_TEMP_OVER[] = { 0x155, 0x255 };
+static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0x152, 0x252 };
+
+/* Fan clock dividers are spread over the following five registers */
+#define W83627EHF_REG_FANDIV1 0x47
+#define W83627EHF_REG_FANDIV2 0x4B
+#define W83627EHF_REG_VBAT 0x5D
+#define W83627EHF_REG_DIODE 0x59
+#define W83627EHF_REG_SMI_OVT 0x4C
+
+/*
+ * Conversions
+ */
+
+static inline unsigned int
+fan_from_reg(u8 reg, unsigned int div)
+{
+ if (reg == 0 || reg == 255)
+ return 0;
+ return 1350000U / (reg * div);
+}
+
+static inline unsigned int
+div_from_reg(u8 reg)
+{
+ return 1 << reg;
+}
+
+static inline int
+temp1_from_reg(s8 reg)
+{
+ return reg * 1000;
+}
+
+static inline s8
+temp1_to_reg(int temp)
+{
+ if (temp <= -128000)
+ return -128;
+ if (temp >= 127000)
+ return 127;
+ if (temp < 0)
+ return (temp - 500) / 1000;
+ return (temp + 500) / 1000;
+}
+
+/*
+ * Data structures and manipulation thereof
+ */
+
+struct w83627ehf_data {
+ struct i2c_client client;
+ struct semaphore lock;
+
+ struct semaphore update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ /* Register values */
+ u8 fan[5];
+ u8 fan_min[5];
+ u8 fan_div[5];
+ u8 has_fan; /* some fan inputs can be disabled */
+ s8 temp1;
+ s8 temp1_max;
+ s8 temp1_max_hyst;
+ s16 temp[2];
+ s16 temp_max[2];
+ s16 temp_max_hyst[2];
+};
+
+static inline int is_word_sized(u16 reg)
+{
+ return (((reg & 0xff00) == 0x100
+ || (reg & 0xff00) == 0x200)
+ && ((reg & 0x00ff) == 0x50
+ || (reg & 0x00ff) == 0x53
+ || (reg & 0x00ff) == 0x55));
+}
+
+/* We assume that the default bank is 0, thus the following two functions do
+ nothing for registers which live in bank 0. For others, they respectively
+ set the bank register to the correct value (before the register is
+ accessed), and back to 0 (afterwards). */
+static inline void w83627ehf_set_bank(struct i2c_client *client, u16 reg)
+{
+ if (reg & 0xff00) {
+ outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
+ outb_p(reg >> 8, client->addr + DATA_REG_OFFSET);
+ }
+}
+
+static inline void w83627ehf_reset_bank(struct i2c_client *client, u16 reg)
+{
+ if (reg & 0xff00) {
+ outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
+ outb_p(0, client->addr + DATA_REG_OFFSET);
+ }
+}
+
+static u16 w83627ehf_read_value(struct i2c_client *client, u16 reg)
+{
+ struct w83627ehf_data *data = i2c_get_clientdata(client);
+ int res, word_sized = is_word_sized(reg);
+
+ down(&data->lock);
+
+ w83627ehf_set_bank(client, reg);
+ outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
+ res = inb_p(client->addr + DATA_REG_OFFSET);
+ if (word_sized) {
+ outb_p((reg & 0xff) + 1,
+ client->addr + ADDR_REG_OFFSET);
+ res = (res << 8) + inb_p(client->addr + DATA_REG_OFFSET);
+ }
+ w83627ehf_reset_bank(client, reg);
+
+ up(&data->lock);
+
+ return res;
+}
+
+static int w83627ehf_write_value(struct i2c_client *client, u16 reg, u16 value)
+{
+ struct w83627ehf_data *data = i2c_get_clientdata(client);
+ int word_sized = is_word_sized(reg);
+
+ down(&data->lock);
+
+ w83627ehf_set_bank(client, reg);
+ outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
+ if (word_sized) {
+ outb_p(value >> 8, client->addr + DATA_REG_OFFSET);
+ outb_p((reg & 0xff) + 1,
+ client->addr + ADDR_REG_OFFSET);
+ }
+ outb_p(value & 0xff, client->addr + DATA_REG_OFFSET);
+ w83627ehf_reset_bank(client, reg);
+
+ up(&data->lock);
+ return 0;
+}
+
+/* This function assumes that the caller holds data->update_lock */
+static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
+{
+ struct w83627ehf_data *data = i2c_get_clientdata(client);
+ u8 reg;
+
+ switch (nr) {
+ case 0:
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf)
+ | ((data->fan_div[0] & 0x03) << 4);
+ w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf)
+ | ((data->fan_div[0] & 0x04) << 3);
+ w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+ break;
+ case 1:
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f)
+ | ((data->fan_div[1] & 0x03) << 6);
+ w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf)
+ | ((data->fan_div[1] & 0x04) << 4);
+ w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+ break;
+ case 2:
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV2) & 0x3f)
+ | ((data->fan_div[2] & 0x03) << 6);
+ w83627ehf_write_value(client, W83627EHF_REG_FANDIV2, reg);
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0x7f)
+ | ((data->fan_div[2] & 0x04) << 5);
+ w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+ break;
+ case 3:
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0xfc)
+ | (data->fan_div[3] & 0x03);
+ w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT) & 0x7f)
+ | ((data->fan_div[3] & 0x04) << 5);
+ w83627ehf_write_value(client, W83627EHF_REG_SMI_OVT, reg);
+ break;
+ case 4:
+ reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0x73)
+ | ((data->fan_div[4] & 0x03) << 3)
+ | ((data->fan_div[4] & 0x04) << 5);
+ w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
+ break;
+ }
+}
+
+static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct w83627ehf_data *data = i2c_get_clientdata(client);
+ int i;
+
+ down(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ)
+ || !data->valid) {
+ /* Fan clock dividers */
+ i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
+ data->fan_div[0] = (i >> 4) & 0x03;
+ data->fan_div[1] = (i >> 6) & 0x03;
+ i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV2);
+ data->fan_div[2] = (i >> 6) & 0x03;
+ i = w83627ehf_read_value(client, W83627EHF_REG_VBAT);
+ data->fan_div[0] |= (i >> 3) & 0x04;
+ data->fan_div[1] |= (i >> 4) & 0x04;
+ data->fan_div[2] |= (i >> 5) & 0x04;
+ if (data->has_fan & ((1 << 3) | (1 << 4))) {
+ i = w83627ehf_read_value(client, W83627EHF_REG_DIODE);
+ data->fan_div[3] = i & 0x03;
+ data->fan_div[4] = ((i >> 2) & 0x03)
+ | ((i >> 5) & 0x04);
+ }
+ if (data->has_fan & (1 << 3)) {
+ i = w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT);
+ data->fan_div[3] |= (i >> 5) & 0x04;
+ }
+
+ /* Measured fan speeds and limits */
+ for (i = 0; i < 5; i++) {
+ if (!(data->has_fan & (1 << i)))
+ continue;
+
+ data->fan[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_FAN[i]);
+ data->fan_min[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_FAN_MIN[i]);
+
+ /* If we failed to measure the fan speed and clock
+ divider can be increased, let's try that for next
+ time */
+ if (data->fan[i] == 0xff
+ && data->fan_div[i] < 0x07) {
+ dev_dbg(&client->dev, "Increasing fan %d "
+ "clock divider from %u to %u\n",
+ i, div_from_reg(data->fan_div[i]),
+ div_from_reg(data->fan_div[i] + 1));
+ data->fan_div[i]++;
+ w83627ehf_write_fan_div(client, i);
+ /* Preserve min limit if possible */
+ if (data->fan_min[i] >= 2
+ && data->fan_min[i] != 255)
+ w83627ehf_write_value(client,
+ W83627EHF_REG_FAN_MIN[i],
+ (data->fan_min[i] /= 2));
+ }
+ }
+
+ /* Measured temperatures and limits */
+ data->temp1 = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP1);
+ data->temp1_max = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP1_OVER);
+ data->temp1_max_hyst = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP1_HYST);
+ for (i = 0; i < 2; i++) {
+ data->temp[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP[i]);
+ data->temp_max[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP_OVER[i]);
+ data->temp_max_hyst[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP_HYST[i]);
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+ return data;
+}
+
+/*
+ * Sysfs callback functions
+ */
+
+#define show_fan_reg(reg) \
+static ssize_t \
+show_##reg(struct device *dev, char *buf, int nr) \
+{ \
+ struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+ return sprintf(buf, "%d\n", \
+ fan_from_reg(data->reg[nr], \
+ div_from_reg(data->fan_div[nr]))); \
+}
+show_fan_reg(fan);
+show_fan_reg(fan_min);
+
+static ssize_t
+show_fan_div(struct device *dev, char *buf, int nr)
+{
+ struct w83627ehf_data *data = w83627ehf_update_device(dev);
+ return sprintf(buf, "%u\n",
+ div_from_reg(data->fan_div[nr]));
+}
+
+static ssize_t
+store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct w83627ehf_data *data = i2c_get_clientdata(client);
+ unsigned int val = simple_strtoul(buf, NULL, 10);
+ unsigned int reg;
+ u8 new_div;
+
+ down(&data->update_lock);
+ if (!val) {
+ /* No min limit, alarm disabled */
+ data->fan_min[nr] = 255;
+ new_div = data->fan_div[nr]; /* No change */
+ dev_info(dev, "fan%u low limit and alarm disabled\n", nr + 1);
+ } else if ((reg = 1350000U / val) >= 128 * 255) {
+ /* Speed below this value cannot possibly be represented,
+ even with the highest divider (128) */
+ data->fan_min[nr] = 254;
+ new_div = 7; /* 128 == (1 << 7) */
+ dev_warn(dev, "fan%u low limit %u below minimum %u, set to "
+ "minimum\n", nr + 1, val, fan_from_reg(254, 128));
+ } else if (!reg) {
+ /* Speed above this value cannot possibly be represented,
+ even with the lowest divider (1) */
+ data->fan_min[nr] = 1;
+ new_div = 0; /* 1 == (1 << 0) */
+ dev_warn(dev, "fan%u low limit %u above maximum %u, set to "
+ "maximum\n", nr + 1, val, fan_from_reg(1, 0));
+ } else {
+ /* Automatically pick the best divider, i.e. the one such
+ that the min limit will correspond to a register value
+ in the 96..192 range */
+ new_div = 0;
+ while (reg > 192 && new_div < 7) {
+ reg >>= 1;
+ new_div++;
+ }
+ data->fan_min[nr] = reg;
+ }
+
+ /* Write both the fan clock divider (if it changed) and the new
+ fan min (unconditionally) */
+ if (new_div != data->fan_div[nr]) {
+ if (new_div > data->fan_div[nr])
+ data->fan[nr] >>= (data->fan_div[nr] - new_div);
+ else
+ data->fan[nr] <<= (new_div - data->fan_div[nr]);
+
+ dev_dbg(dev, "fan%u clock divider changed from %u to %u\n",
+ nr + 1, div_from_reg(data->fan_div[nr]),
+ div_from_reg(new_div));
+ data->fan_div[nr] = new_div;
+ w83627ehf_write_fan_div(client, nr);
+ }
+ w83627ehf_write_value(client, W83627EHF_REG_FAN_MIN[nr],
+ data->fan_min[nr]);
+ up(&data->update_lock);
+
+ return count;
+}
+
+#define sysfs_fan_offset(offset) \
+static ssize_t \
+show_reg_fan_##offset(struct device *dev, char *buf) \
+{ \
+ return show_fan(dev, buf, offset-1); \
+} \
+static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
+ show_reg_fan_##offset, NULL);
+
+#define sysfs_fan_min_offset(offset) \
+static ssize_t \
+show_reg_fan##offset##_min(struct device *dev, char *buf) \
+{ \
+ return show_fan_min(dev, buf, offset-1); \
+} \
+static ssize_t \
+store_reg_fan##offset##_min(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ return store_fan_min(dev, buf, count, offset-1); \
+} \
+static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ show_reg_fan##offset##_min, \
+ store_reg_fan##offset##_min);
+
+#define sysfs_fan_div_offset(offset) \
+static ssize_t \
+show_reg_fan##offset##_div(struct device *dev, char *buf) \
+{ \
+ return show_fan_div(dev, buf, offset - 1); \
+} \
+static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \
+ show_reg_fan##offset##_div, NULL);
+
+sysfs_fan_offset(1);
+sysfs_fan_min_offset(1);
+sysfs_fan_div_offset(1);
+sysfs_fan_offset(2);
+sysfs_fan_min_offset(2);
+sysfs_fan_div_offset(2);
+sysfs_fan_offset(3);
+sysfs_fan_min_offset(3);
+sysfs_fan_div_offset(3);
+sysfs_fan_offset(4);
+sysfs_fan_min_offset(4);
+sysfs_fan_div_offset(4);
+sysfs_fan_offset(5);
+sysfs_fan_min_offset(5);
+sysfs_fan_div_offset(5);
+
+#define show_temp1_reg(reg) \
+static ssize_t \
+show_##reg(struct device *dev, char *buf) \
+{ \
+ struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+ return sprintf(buf, "%d\n", temp1_from_reg(data->reg)); \
+}
+show_temp1_reg(temp1);
+show_temp1_reg(temp1_max);
+show_temp1_reg(temp1_max_hyst);
+
+#define store_temp1_reg(REG, reg) \
+static ssize_t \
+store_temp1_##reg(struct device *dev, const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct w83627ehf_data *data = i2c_get_clientdata(client); \
+ u32 val = simple_strtoul(buf, NULL, 10); \
+ \
+ down(&data->update_lock); \
+ data->temp1_##reg = temp1_to_reg(val); \
+ w83627ehf_write_value(client, W83627EHF_REG_TEMP1_##REG, \
+ data->temp1_##reg); \
+ up(&data->update_lock); \
+ return count; \
+}
+store_temp1_reg(OVER, max);
+store_temp1_reg(HYST, max_hyst);
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1, NULL);
+static DEVICE_ATTR(temp1_max, S_IRUGO| S_IWUSR,
+ show_temp1_max, store_temp1_max);
+static DEVICE_ATTR(temp1_max_hyst, S_IRUGO| S_IWUSR,
+ show_temp1_max_hyst, store_temp1_max_hyst);
+
+#define show_temp_reg(reg) \
+static ssize_t \
+show_##reg (struct device *dev, char *buf, int nr) \
+{ \
+ struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+ return sprintf(buf, "%d\n", \
+ LM75_TEMP_FROM_REG(data->reg[nr])); \
+}
+show_temp_reg(temp);
+show_temp_reg(temp_max);
+show_temp_reg(temp_max_hyst);
+
+#define store_temp_reg(REG, reg) \
+static ssize_t \
+store_##reg (struct device *dev, const char *buf, size_t count, int nr) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct w83627ehf_data *data = i2c_get_clientdata(client); \
+ u32 val = simple_strtoul(buf, NULL, 10); \
+ \
+ down(&data->update_lock); \
+ data->reg[nr] = LM75_TEMP_TO_REG(val); \
+ w83627ehf_write_value(client, W83627EHF_REG_TEMP_##REG[nr], \
+ data->reg[nr]); \
+ up(&data->update_lock); \
+ return count; \
+}
+store_temp_reg(OVER, temp_max);
+store_temp_reg(HYST, temp_max_hyst);
+
+#define sysfs_temp_offset(offset) \
+static ssize_t \
+show_reg_temp##offset (struct device *dev, char *buf) \
+{ \
+ return show_temp(dev, buf, offset - 2); \
+} \
+static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
+ show_reg_temp##offset, NULL);
+
+#define sysfs_temp_reg_offset(reg, offset) \
+static ssize_t \
+show_reg_temp##offset##_##reg(struct device *dev, char *buf) \
+{ \
+ return show_temp_##reg(dev, buf, offset - 2); \
+} \
+static ssize_t \
+store_reg_temp##offset##_##reg(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ return store_temp_##reg(dev, buf, count, offset - 2); \
+} \
+static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, \
+ show_reg_temp##offset##_##reg, \
+ store_reg_temp##offset##_##reg);
+
+sysfs_temp_offset(2);
+sysfs_temp_reg_offset(max, 2);
+sysfs_temp_reg_offset(max_hyst, 2);
+sysfs_temp_offset(3);
+sysfs_temp_reg_offset(max, 3);
+sysfs_temp_reg_offset(max_hyst, 3);
+
+/*
+ * Driver and client management
+ */
+
+static struct i2c_driver w83627ehf_driver;
+
+static void w83627ehf_init_client(struct i2c_client *client)
+{
+ int i;
+ u8 tmp;
+
+ /* Start monitoring is needed */
+ tmp = w83627ehf_read_value(client, W83627EHF_REG_CONFIG);
+ if (!(tmp & 0x01))
+ w83627ehf_write_value(client, W83627EHF_REG_CONFIG,
+ tmp | 0x01);
+
+ /* Enable temp2 and temp3 if needed */
+ for (i = 0; i < 2; i++) {
+ tmp = w83627ehf_read_value(client,
+ W83627EHF_REG_TEMP_CONFIG[i]);
+ if (tmp & 0x01)
+ w83627ehf_write_value(client,
+ W83627EHF_REG_TEMP_CONFIG[i],
+ tmp & 0xfe);
+ }
+}
+
+static int w83627ehf_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *client;
+ struct w83627ehf_data *data;
+ int i, err = 0;
+
+ if (!i2c_is_isa_adapter(adapter))
+ return 0;
+
+ if (!request_region(address, REGION_LENGTH, w83627ehf_driver.name)) {
+ err = -EBUSY;
+ goto exit;
+ }
+
+ if (!(data = kmalloc(sizeof(struct w83627ehf_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+ memset(data, 0, sizeof(struct w83627ehf_data));
+
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = address;
+ init_MUTEX(&data->lock);
+ client->adapter = adapter;
+ client->driver = &w83627ehf_driver;
+ client->flags = 0;
+
+ strlcpy(client->name, "w83627ehf", 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(client)))
+ goto exit_free;
+
+ /* Initialize the chip */
+ w83627ehf_init_client(client);
+
+ /* A few vars need to be filled upon startup */
+ for (i = 0; i < 5; i++)
+ data->fan_min[i] = w83627ehf_read_value(client,
+ W83627EHF_REG_FAN_MIN[i]);
+
+ /* It looks like fan4 and fan5 pins can be alternatively used
+ as fan on/off switches */
+ data->has_fan = 0x07; /* fan1, fan2 and fan3 */
+ i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
+ if (i & (1 << 2))
+ data->has_fan |= (1 << 3);
+ if (i & (1 << 0))
+ data->has_fan |= (1 << 4);
+
+ /* Register sysfs hooks */
+ device_create_file(&client->dev, &dev_attr_fan1_input);
+ device_create_file(&client->dev, &dev_attr_fan1_min);
+ device_create_file(&client->dev, &dev_attr_fan1_div);
+ device_create_file(&client->dev, &dev_attr_fan2_input);
+ device_create_file(&client->dev, &dev_attr_fan2_min);
+ device_create_file(&client->dev, &dev_attr_fan2_div);
+ device_create_file(&client->dev, &dev_attr_fan3_input);
+ device_create_file(&client->dev, &dev_attr_fan3_min);
+ device_create_file(&client->dev, &dev_attr_fan3_div);
+
+ if (data->has_fan & (1 << 3)) {
+ device_create_file(&client->dev, &dev_attr_fan4_input);
+ device_create_file(&client->dev, &dev_attr_fan4_min);
+ device_create_file(&client->dev, &dev_attr_fan4_div);
+ }
+ if (data->has_fan & (1 << 4)) {
+ device_create_file(&client->dev, &dev_attr_fan5_input);
+ device_create_file(&client->dev, &dev_attr_fan5_min);
+ device_create_file(&client->dev, &dev_attr_fan5_div);
+ }
+
+ device_create_file(&client->dev, &dev_attr_temp1_input);
+ device_create_file(&client->dev, &dev_attr_temp1_max);
+ device_create_file(&client->dev, &dev_attr_temp1_max_hyst);
+ device_create_file(&client->dev, &dev_attr_temp2_input);
+ device_create_file(&client->dev, &dev_attr_temp2_max);
+ device_create_file(&client->dev, &dev_attr_temp2_max_hyst);
+ device_create_file(&client->dev, &dev_attr_temp3_input);
+ device_create_file(&client->dev, &dev_attr_temp3_max);
+ device_create_file(&client->dev, &dev_attr_temp3_max_hyst);
+
+ return 0;
+
+exit_free:
+ kfree(data);
+exit_release:
+ release_region(address, REGION_LENGTH);
+exit:
+ return err;
+}
+
+static int w83627ehf_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_detect(adapter, &addr_data, w83627ehf_detect);
+}
+
+static int w83627ehf_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;
+ }
+ release_region(client->addr, REGION_LENGTH);
+ kfree(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+static struct i2c_driver w83627ehf_driver = {
+ .owner = THIS_MODULE,
+ .name = "w83627ehf",
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = w83627ehf_attach_adapter,
+ .detach_client = w83627ehf_detach_client,
+};
+
+static int __init w83627ehf_find(int sioaddr, int *address)
+{
+ u16 val;
+
+ REG = sioaddr;
+ VAL = sioaddr + 1;
+ superio_enter();
+
+ val = (superio_inb(SIO_REG_DEVID) << 8)
+ | superio_inb(SIO_REG_DEVID + 1);
+ if ((val & SIO_ID_MASK) != SIO_W83627EHF_ID) {
+ superio_exit();
+ return -ENODEV;
+ }
+
+ superio_select(W83627EHF_LD_HWM);
+ val = (superio_inb(SIO_REG_ADDR) << 8)
+ | superio_inb(SIO_REG_ADDR + 1);
+ *address = val & ~(REGION_LENGTH - 1);
+ if (*address == 0) {
+ superio_exit();
+ return -ENODEV;
+ }
+
+ /* Activate logical device if needed */
+ val = superio_inb(SIO_REG_ENABLE);
+ if (!(val & 0x01))
+ superio_outb(SIO_REG_ENABLE, val | 0x01);
+
+ superio_exit();
+ return 0;
+}
+
+static int __init sensors_w83627ehf_init(void)
+{
+ if (w83627ehf_find(0x2e, &normal_isa[0])
+ && w83627ehf_find(0x4e, &normal_isa[0]))
+ return -ENODEV;
+
+ return i2c_add_driver(&w83627ehf_driver);
+}
+
+static void __exit sensors_w83627ehf_exit(void)
+{
+ i2c_del_driver(&w83627ehf_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("W83627EHF driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_w83627ehf_init);
+module_exit(sensors_w83627ehf_exit);
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff