w83627ehf - Driver for the hardware monitoring functionality of
the Winbond W83627EHF Super-I/O chip
Copyright (C) 2005 Jean Delvare <khali@linux-fr.org>
- Copyright (C) 2006 Yuan Mu <Ymu@Winbond.com.tw>,
- Rudolf Marek <r.marek@sh.cvut.cz>
+ Copyright (C) 2006 Yuan Mu (Winbond),
+ Rudolf Marek <r.marek@assembler.cz>
+ David Hubbard <david.c.hubbard@gmail.com>
Shamelessly ripped from the w83627hf driver
Copyright (C) 2003 Mark Studebaker
Supports the following chips:
- Chip #vin #fan #pwm #temp chip_id man_id
- w83627ehf 10 5 4 3 0x88,0xa1 0x5ca3
+ Chip #vin #fan #pwm #temp chip IDs man ID
+ w83627ehf 10 5 4 3 0x8850 0x88 0x5ca3
+ 0x8860 0xa1
+ w83627dhg 9 5 4 3 0xa020 0xc1 0x5ca3
*/
#include <linux/module.h>
* Super-I/O constants and functions
*/
+/*
+ * The three following globals are initialized in w83627ehf_find(), before
+ * the i2c-isa device is created. Otherwise, they could be stored in
+ * w83627ehf_data. This is ugly, but necessary, and when the driver is next
+ * updated to become a platform driver, the globals will disappear.
+ */
static int REG; /* The register to read/write */
static int VAL; /* The value to read/write */
+/* The w83627ehf/ehg have 10 voltage inputs, but the w83627dhg has 9. This
+ * value is also used in w83627ehf_detect() to export a device name in sysfs
+ * (e.g. w83627ehf or w83627dhg) */
+static int w83627ehf_num_in;
#define W83627EHF_LD_HWM 0x0b
#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
+#define SIO_W83627EHF_ID 0x8850
+#define SIO_W83627EHG_ID 0x8860
+#define SIO_W83627DHG_ID 0xa020
+#define SIO_ID_MASK 0xFFF0
static inline void
superio_outb(int reg, int val)
#define W83627EHF_REG_BANK 0x4E
#define W83627EHF_REG_CONFIG 0x40
-#define W83627EHF_REG_CHIP_ID 0x49
-#define W83627EHF_REG_MAN_ID 0x4F
+
+/* Not currently used:
+ * REG_MAN_ID has the value 0x5ca3 for all supported chips.
+ * REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model.
+ * REG_MAN_ID is at port 0x4f
+ * REG_CHIP_ID is at port 0x58 */
static const u16 W83627EHF_REG_FAN[] = { 0x28, 0x29, 0x2a, 0x3f, 0x553 };
static const u16 W83627EHF_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d, 0x3e, 0x55c };
case 0:
reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf)
| ((data->fan_div[0] & 0x03) << 4);
+ /* fan5 input control bit is write only, compute the value */
+ reg |= (data->has_fan & (1 << 4)) ? 1 : 0;
w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf)
| ((data->fan_div[0] & 0x04) << 3);
case 1:
reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f)
| ((data->fan_div[1] & 0x03) << 6);
+ /* fan5 input control bit is write only, compute the value */
+ reg |= (data->has_fan & (1 << 4)) ? 1 : 0;
w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf)
| ((data->fan_div[1] & 0x04) << 4);
}
/* Measured voltages and limits */
- for (i = 0; i < 10; i++) {
+ for (i = 0; i < w83627ehf_num_in; i++) {
data->in[i] = w83627ehf_read_value(client,
W83627EHF_REG_IN(i));
data->in_min[i] = w83627ehf_read_value(client,
SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 9),
};
-static void device_create_file_in(struct device *dev, int i)
-{
- device_create_file(dev, &sda_in_input[i].dev_attr);
- device_create_file(dev, &sda_in_alarm[i].dev_attr);
- device_create_file(dev, &sda_in_min[i].dev_attr);
- device_create_file(dev, &sda_in_max[i].dev_attr);
-}
-
#define show_fan_reg(reg) \
static ssize_t \
show_##reg(struct device *dev, struct device_attribute *attr, \
SENSOR_ATTR(fan5_div, S_IRUGO, show_fan_div, NULL, 4),
};
-static void device_create_file_fan(struct device *dev, int i)
-{
- device_create_file(dev, &sda_fan_input[i].dev_attr);
- device_create_file(dev, &sda_fan_alarm[i].dev_attr);
- device_create_file(dev, &sda_fan_div[i].dev_attr);
- device_create_file(dev, &sda_fan_min[i].dev_attr);
-}
-
#define show_temp1_reg(reg) \
static ssize_t \
show_##reg(struct device *dev, struct device_attribute *attr, \
store_tolerance, 3),
};
-static void device_create_file_pwm(struct device *dev, int i)
-{
- device_create_file(dev, &sda_pwm[i].dev_attr);
- device_create_file(dev, &sda_pwm_mode[i].dev_attr);
- device_create_file(dev, &sda_pwm_enable[i].dev_attr);
- device_create_file(dev, &sda_target_temp[i].dev_attr);
- device_create_file(dev, &sda_tolerance[i].dev_attr);
-}
-
/* Smart Fan registers */
#define fan_functions(reg, REG) \
* Driver and client management
*/
+static void w83627ehf_device_remove_files(struct device *dev)
+{
+ /* some entries in the following arrays may not have been used in
+ * device_create_file(), but device_remove_file() will ignore them */
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
+ device_remove_file(dev, &sda_sf3_arrays[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
+ device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
+ for (i = 0; i < w83627ehf_num_in; i++) {
+ device_remove_file(dev, &sda_in_input[i].dev_attr);
+ device_remove_file(dev, &sda_in_alarm[i].dev_attr);
+ device_remove_file(dev, &sda_in_min[i].dev_attr);
+ device_remove_file(dev, &sda_in_max[i].dev_attr);
+ }
+ for (i = 0; i < 5; i++) {
+ device_remove_file(dev, &sda_fan_input[i].dev_attr);
+ device_remove_file(dev, &sda_fan_alarm[i].dev_attr);
+ device_remove_file(dev, &sda_fan_div[i].dev_attr);
+ device_remove_file(dev, &sda_fan_min[i].dev_attr);
+ }
+ for (i = 0; i < 4; i++) {
+ device_remove_file(dev, &sda_pwm[i].dev_attr);
+ device_remove_file(dev, &sda_pwm_mode[i].dev_attr);
+ device_remove_file(dev, &sda_pwm_enable[i].dev_attr);
+ device_remove_file(dev, &sda_target_temp[i].dev_attr);
+ device_remove_file(dev, &sda_tolerance[i].dev_attr);
+ }
+ for (i = 0; i < ARRAY_SIZE(sda_temp); i++)
+ device_remove_file(dev, &sda_temp[i].dev_attr);
+}
+
static struct i2c_driver w83627ehf_driver;
static void w83627ehf_init_client(struct i2c_client *client)
client->flags = 0;
dev = &client->dev;
- strlcpy(client->name, "w83627ehf", I2C_NAME_SIZE);
+ if (w83627ehf_num_in == 9)
+ strlcpy(client->name, "w83627dhg", I2C_NAME_SIZE);
+ else /* just say ehf. 627EHG is 627EHF in lead-free packaging. */
+ strlcpy(client->name, "w83627ehf", I2C_NAME_SIZE);
+
data->valid = 0;
mutex_init(&data->update_lock);
superio_exit();
/* It looks like fan4 and fan5 pins can be alternatively used
- as fan on/off switches */
+ as fan on/off switches, but fan5 control is write only :/
+ We assume that if the serial interface is disabled, designers
+ connected fan5 as input unless they are emitting log 1, which
+ is not the default. */
data->has_fan = 0x07; /* fan1, fan2 and fan3 */
i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
if ((i & (1 << 2)) && (!fan4pin))
data->has_fan |= (1 << 3);
- if ((i & (1 << 0)) && (!fan5pin))
+ if (!(i & (1 << 1)) && (!fan5pin))
data->has_fan |= (1 << 4);
/* Register sysfs hooks */
- data->class_dev = hwmon_device_register(dev);
- if (IS_ERR(data->class_dev)) {
- err = PTR_ERR(data->class_dev);
- goto exit_detach;
- }
-
for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
- device_create_file(dev, &sda_sf3_arrays[i].dev_attr);
+ if ((err = device_create_file(dev,
+ &sda_sf3_arrays[i].dev_attr)))
+ goto exit_remove;
/* if fan4 is enabled create the sf3 files for it */
if (data->has_fan & (1 << 3))
- for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
- device_create_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {
+ if ((err = device_create_file(dev,
+ &sda_sf3_arrays_fan4[i].dev_attr)))
+ goto exit_remove;
+ }
- for (i = 0; i < 10; i++)
- device_create_file_in(dev, i);
+ for (i = 0; i < w83627ehf_num_in; i++)
+ if ((err = device_create_file(dev, &sda_in_input[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_in_alarm[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_in_min[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_in_max[i].dev_attr)))
+ goto exit_remove;
for (i = 0; i < 5; i++) {
if (data->has_fan & (1 << i)) {
- device_create_file_fan(dev, i);
- if (i != 4) /* we have only 4 pwm */
- device_create_file_pwm(dev, i);
+ if ((err = device_create_file(dev,
+ &sda_fan_input[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_fan_alarm[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_fan_div[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_fan_min[i].dev_attr)))
+ goto exit_remove;
+ if (i < 4 && /* w83627ehf only has 4 pwm */
+ ((err = device_create_file(dev,
+ &sda_pwm[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_pwm_mode[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_pwm_enable[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_target_temp[i].dev_attr))
+ || (err = device_create_file(dev,
+ &sda_tolerance[i].dev_attr))))
+ goto exit_remove;
}
}
for (i = 0; i < ARRAY_SIZE(sda_temp); i++)
- device_create_file(dev, &sda_temp[i].dev_attr);
+ if ((err = device_create_file(dev, &sda_temp[i].dev_attr)))
+ goto exit_remove;
+
+ data->class_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto exit_remove;
+ }
return 0;
-exit_detach:
+exit_remove:
+ w83627ehf_device_remove_files(dev);
i2c_detach_client(client);
exit_free:
kfree(data);
int err;
hwmon_device_unregister(data->class_dev);
+ w83627ehf_device_remove_files(&client->dev);
if ((err = i2c_detach_client(client)))
return err;
val = (superio_inb(SIO_REG_DEVID) << 8)
| superio_inb(SIO_REG_DEVID + 1);
- if ((val & SIO_ID_MASK) != SIO_W83627EHF_ID) {
+ switch (val & SIO_ID_MASK) {
+ case SIO_W83627DHG_ID:
+ w83627ehf_num_in = 9;
+ break;
+ case SIO_W83627EHF_ID:
+ case SIO_W83627EHG_ID:
+ w83627ehf_num_in = 10;
+ break;
+ default:
+ printk(KERN_WARNING "w83627ehf: unsupported chip ID: 0x%04x\n",
+ val);
superio_exit();
return -ENODEV;
}
projects / linux-2.6-omap-h63xx.git / blobdiff