/* fschmd.c
*
- * Copyright (C) 2007 Hans de Goede <j.w.r.degoede@hhs.nl>
+ * Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com>
*
* 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
/*
* Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
- * Scylla, Heracles and Heimdall chips
+ * Scylla, Heracles, Heimdall, Hades and Syleus chips
*
* Based on the original 2.4 fscscy, 2.6 fscpos, 2.6 fscher and 2.6
* (candidate) fschmd drivers:
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/dmi.h>
+#include <linux/fs.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/kref.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
/* Insmod parameters */
-I2C_CLIENT_INSMOD_5(fscpos, fscher, fscscy, fschrc, fschmd);
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+I2C_CLIENT_INSMOD_7(fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl);
/*
* The FSCHMD registers and other defines
#define FSCHMD_REG_EVENT_STATE 0x04
#define FSCHMD_REG_CONTROL 0x05
-#define FSCHMD_CONTROL_ALERT_LED_MASK 0x01
+#define FSCHMD_CONTROL_ALERT_LED 0x01
-/* watchdog (support to be implemented) */
-#define FSCHMD_REG_WDOG_PRESET 0x28
-#define FSCHMD_REG_WDOG_STATE 0x23
-#define FSCHMD_REG_WDOG_CONTROL 0x21
+/* watchdog */
+static const u8 FSCHMD_REG_WDOG_CONTROL[7] =
+ { 0x21, 0x21, 0x21, 0x21, 0x21, 0x28, 0x28 };
+static const u8 FSCHMD_REG_WDOG_STATE[7] =
+ { 0x23, 0x23, 0x23, 0x23, 0x23, 0x29, 0x29 };
+static const u8 FSCHMD_REG_WDOG_PRESET[7] =
+ { 0x28, 0x28, 0x28, 0x28, 0x28, 0x2a, 0x2a };
+
+#define FSCHMD_WDOG_CONTROL_TRIGGER 0x10
+#define FSCHMD_WDOG_CONTROL_STARTED 0x10 /* the same as trigger */
+#define FSCHMD_WDOG_CONTROL_STOP 0x20
+#define FSCHMD_WDOG_CONTROL_RESOLUTION 0x40
+
+#define FSCHMD_WDOG_STATE_CARDRESET 0x02
/* voltages, weird order is to keep the same order as the old drivers */
-static const u8 FSCHMD_REG_VOLT[3] = { 0x45, 0x42, 0x48 };
+static const u8 FSCHMD_REG_VOLT[7][6] = {
+ { 0x45, 0x42, 0x48 }, /* pos */
+ { 0x45, 0x42, 0x48 }, /* her */
+ { 0x45, 0x42, 0x48 }, /* scy */
+ { 0x45, 0x42, 0x48 }, /* hrc */
+ { 0x45, 0x42, 0x48 }, /* hmd */
+ { 0x21, 0x20, 0x22 }, /* hds */
+ { 0x21, 0x20, 0x22, 0x23, 0x24, 0x25 }, /* syl */
+};
+
+static const int FSCHMD_NO_VOLT_SENSORS[7] = { 3, 3, 3, 3, 3, 3, 6 };
/* minimum pwm at which the fan is driven (pwm can by increased depending on
the temp. Notice that for the scy some fans share there minimum speed.
Also notice that with the scy the sensor order is different than with the
other chips, this order was in the 2.4 driver and kept for consistency. */
-static const u8 FSCHMD_REG_FAN_MIN[5][6] = {
+static const u8 FSCHMD_REG_FAN_MIN[7][7] = {
{ 0x55, 0x65 }, /* pos */
{ 0x55, 0x65, 0xb5 }, /* her */
{ 0x65, 0x65, 0x55, 0xa5, 0x55, 0xa5 }, /* scy */
{ 0x55, 0x65, 0xa5, 0xb5 }, /* hrc */
{ 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hmd */
+ { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hds */
+ { 0x54, 0x64, 0x74, 0x84, 0x94, 0xa4, 0xb4 }, /* syl */
};
/* actual fan speed */
-static const u8 FSCHMD_REG_FAN_ACT[5][6] = {
+static const u8 FSCHMD_REG_FAN_ACT[7][7] = {
{ 0x0e, 0x6b, 0xab }, /* pos */
{ 0x0e, 0x6b, 0xbb }, /* her */
{ 0x6b, 0x6c, 0x0e, 0xab, 0x5c, 0xbb }, /* scy */
{ 0x0e, 0x6b, 0xab, 0xbb }, /* hrc */
{ 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hmd */
+ { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hds */
+ { 0x57, 0x67, 0x77, 0x87, 0x97, 0xa7, 0xb7 }, /* syl */
};
/* fan status registers */
-static const u8 FSCHMD_REG_FAN_STATE[5][6] = {
+static const u8 FSCHMD_REG_FAN_STATE[7][7] = {
{ 0x0d, 0x62, 0xa2 }, /* pos */
{ 0x0d, 0x62, 0xb2 }, /* her */
{ 0x62, 0x61, 0x0d, 0xa2, 0x52, 0xb2 }, /* scy */
{ 0x0d, 0x62, 0xa2, 0xb2 }, /* hrc */
{ 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hmd */
+ { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hds */
+ { 0x50, 0x60, 0x70, 0x80, 0x90, 0xa0, 0xb0 }, /* syl */
};
/* fan ripple / divider registers */
-static const u8 FSCHMD_REG_FAN_RIPPLE[5][6] = {
+static const u8 FSCHMD_REG_FAN_RIPPLE[7][7] = {
{ 0x0f, 0x6f, 0xaf }, /* pos */
{ 0x0f, 0x6f, 0xbf }, /* her */
{ 0x6f, 0x6f, 0x0f, 0xaf, 0x0f, 0xbf }, /* scy */
{ 0x0f, 0x6f, 0xaf, 0xbf }, /* hrc */
{ 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hmd */
+ { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hds */
+ { 0x56, 0x66, 0x76, 0x86, 0x96, 0xa6, 0xb6 }, /* syl */
};
-static const int FSCHMD_NO_FAN_SENSORS[5] = { 3, 3, 6, 4, 5 };
+static const int FSCHMD_NO_FAN_SENSORS[7] = { 3, 3, 6, 4, 5, 5, 7 };
/* Fan status register bitmasks */
-#define FSCHMD_FAN_ALARM_MASK 0x04 /* called fault by FSC! */
-#define FSCHMD_FAN_NOT_PRESENT_MASK 0x08 /* not documented */
+#define FSCHMD_FAN_ALARM 0x04 /* called fault by FSC! */
+#define FSCHMD_FAN_NOT_PRESENT 0x08
+#define FSCHMD_FAN_DISABLED 0x80
/* actual temperature registers */
-static const u8 FSCHMD_REG_TEMP_ACT[5][5] = {
+static const u8 FSCHMD_REG_TEMP_ACT[7][11] = {
{ 0x64, 0x32, 0x35 }, /* pos */
{ 0x64, 0x32, 0x35 }, /* her */
{ 0x64, 0xD0, 0x32, 0x35 }, /* scy */
{ 0x64, 0x32, 0x35 }, /* hrc */
{ 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hmd */
+ { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hds */
+ { 0x58, 0x68, 0x78, 0x88, 0x98, 0xa8, /* syl */
+ 0xb8, 0xc8, 0xd8, 0xe8, 0xf8 },
};
/* temperature state registers */
-static const u8 FSCHMD_REG_TEMP_STATE[5][5] = {
+static const u8 FSCHMD_REG_TEMP_STATE[7][11] = {
{ 0x71, 0x81, 0x91 }, /* pos */
{ 0x71, 0x81, 0x91 }, /* her */
{ 0x71, 0xd1, 0x81, 0x91 }, /* scy */
{ 0x71, 0x81, 0x91 }, /* hrc */
{ 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
+ { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hds */
+ { 0x59, 0x69, 0x79, 0x89, 0x99, 0xa9, /* syl */
+ 0xb9, 0xc9, 0xd9, 0xe9, 0xf9 },
};
/* temperature high limit registers, FSC does not document these. Proven to be
in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
at these addresses, but doesn't want to confirm they are the same as with
the fscher?? */
-static const u8 FSCHMD_REG_TEMP_LIMIT[5][5] = {
+static const u8 FSCHMD_REG_TEMP_LIMIT[7][11] = {
{ 0, 0, 0 }, /* pos */
{ 0x76, 0x86, 0x96 }, /* her */
{ 0x76, 0xd6, 0x86, 0x96 }, /* scy */
{ 0x76, 0x86, 0x96 }, /* hrc */
{ 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
+ { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hds */
+ { 0x5a, 0x6a, 0x7a, 0x8a, 0x9a, 0xaa, /* syl */
+ 0xba, 0xca, 0xda, 0xea, 0xfa },
};
/* These were found through experimenting with an fscher, currently they are
not used, but we keep them around for future reference.
+ On the fscsyl AUTOP1 lives at 0x#c (so 0x5c for fan1, 0x6c for fan2, etc),
+ AUTOP2 lives at 0x#e, and 0x#1 is a bitmask defining which temps influence
+ the fan speed.
static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 }; */
-static const int FSCHMD_NO_TEMP_SENSORS[5] = { 3, 3, 4, 3, 5 };
+static const int FSCHMD_NO_TEMP_SENSORS[7] = { 3, 3, 4, 3, 5, 5, 11 };
/* temp status register bitmasks */
-#define FSCHMD_TEMP_WORKING_MASK 0x01
-#define FSCHMD_TEMP_ALERT_MASK 0x02
+#define FSCHMD_TEMP_WORKING 0x01
+#define FSCHMD_TEMP_ALERT 0x02
+#define FSCHMD_TEMP_DISABLED 0x80
/* there only really is an alarm if the sensor is working and alert == 1 */
#define FSCHMD_TEMP_ALARM_MASK \
- (FSCHMD_TEMP_WORKING_MASK | FSCHMD_TEMP_ALERT_MASK)
-
-/* our driver name */
-#define FSCHMD_NAME "fschmd"
+ (FSCHMD_TEMP_WORKING | FSCHMD_TEMP_ALERT)
/*
* Functions declarations
{ "fscscy", fscscy },
{ "fschrc", fschrc },
{ "fschmd", fschmd },
+ { "fschds", fschds },
+ { "fscsyl", fscsyl },
{ }
};
MODULE_DEVICE_TABLE(i2c, fschmd_id);
static struct i2c_driver fschmd_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
- .name = FSCHMD_NAME,
+ .name = "fschmd",
},
.probe = fschmd_probe,
.remove = fschmd_remove,
*/
struct fschmd_data {
+ struct i2c_client *client;
struct device *hwmon_dev;
struct mutex update_lock;
+ struct mutex watchdog_lock;
+ struct list_head list; /* member of the watchdog_data_list */
+ struct kref kref;
+ struct miscdevice watchdog_miscdev;
int kind;
+ unsigned long watchdog_is_open;
+ char watchdog_expect_close;
+ char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
/* register values */
+ u8 revision; /* chip revision */
u8 global_control; /* global control register */
- u8 volt[3]; /* 12, 5, battery voltage */
- u8 temp_act[5]; /* temperature */
- u8 temp_status[5]; /* status of sensor */
- u8 temp_max[5]; /* high temp limit, notice: undocumented! */
- u8 fan_act[6]; /* fans revolutions per second */
- u8 fan_status[6]; /* fan status */
- u8 fan_min[6]; /* fan min value for rps */
- u8 fan_ripple[6]; /* divider for rps */
+ u8 watchdog_control; /* watchdog control register */
+ u8 watchdog_state; /* watchdog status register */
+ u8 watchdog_preset; /* watchdog counter preset on trigger val */
+ u8 volt[6]; /* voltage */
+ u8 temp_act[11]; /* temperature */
+ u8 temp_status[11]; /* status of sensor */
+ u8 temp_max[11]; /* high temp limit, notice: undocumented! */
+ u8 fan_act[7]; /* fans revolutions per second */
+ u8 fan_status[7]; /* fan status */
+ u8 fan_min[7]; /* fan min value for rps */
+ u8 fan_ripple[7]; /* divider for rps */
};
/* Global variables to hold information read from special DMI tables, which are
- available on FSC machines with an fscher or later chip. */
-static int dmi_mult[3] = { 490, 200, 100 };
-static int dmi_offset[3] = { 0, 0, 0 };
+ available on FSC machines with an fscher or later chip. There is no need to
+ protect these with a lock as they are only modified from our attach function
+ which always gets called with the i2c-core lock held and never accessed
+ before the attach function is done with them. */
+static int dmi_mult[6] = { 490, 200, 100, 100, 200, 100 };
+static int dmi_offset[6] = { 0, 0, 0, 0, 0, 0 };
static int dmi_vref = -1;
+/* Somewhat ugly :( global data pointer list with all fschmd devices, so that
+ we can find our device data as when using misc_register there is no other
+ method to get to ones device data from the open fop. */
+static LIST_HEAD(watchdog_data_list);
+/* Note this lock not only protect list access, but also data.kref access */
+static DEFINE_MUTEX(watchdog_data_mutex);
+
+/* Release our data struct when we're detached from the i2c client *and* all
+ references to our watchdog device are released */
+static void fschmd_release_resources(struct kref *ref)
+{
+ struct fschmd_data *data = container_of(ref, struct fschmd_data, kref);
+ kfree(data);
+}
/*
* Sysfs attr show / store functions
struct fschmd_data *data = fschmd_update_device(dev);
/* bit 0 set means sensor working ok, so no fault! */
- if (data->temp_status[index] & FSCHMD_TEMP_WORKING_MASK)
+ if (data->temp_status[index] & FSCHMD_TEMP_WORKING)
return sprintf(buf, "0\n");
else
return sprintf(buf, "1\n");
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = fschmd_update_device(dev);
- if (data->fan_status[index] & FSCHMD_FAN_ALARM_MASK)
+ if (data->fan_status[index] & FSCHMD_FAN_ALARM)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = fschmd_update_device(dev);
- if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT_MASK)
+ if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
struct device_attribute *devattr, char *buf)
{
int index = to_sensor_dev_attr(devattr)->index;
- int val = fschmd_update_device(dev)->fan_min[index];
+ struct fschmd_data *data = fschmd_update_device(dev);
+ int val = data->fan_min[index];
- /* 0 = allow turning off, 1-255 = 50-100% */
- if (val)
+ /* 0 = allow turning off (except on the syl), 1-255 = 50-100% */
+ if (val || data->kind == fscsyl - 1)
val = val / 2 + 128;
return sprintf(buf, "%d\n", val);
struct fschmd_data *data = dev_get_drvdata(dev);
unsigned long v = simple_strtoul(buf, NULL, 10);
- /* register: 0 = allow turning off, 1-255 = 50-100% */
- if (v) {
+ /* reg: 0 = allow turning off (except on the syl), 1-255 = 50-100% */
+ if (v || data->kind == fscsyl - 1) {
v = SENSORS_LIMIT(v, 128, 255);
v = (v - 128) * 2 + 1;
}
{
struct fschmd_data *data = fschmd_update_device(dev);
- if (data->global_control & FSCHMD_CONTROL_ALERT_LED_MASK)
+ if (data->global_control & FSCHMD_CONTROL_ALERT_LED)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
if (v)
- reg |= FSCHMD_CONTROL_ALERT_LED_MASK;
+ reg |= FSCHMD_CONTROL_ALERT_LED;
else
- reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK;
+ reg &= ~FSCHMD_CONTROL_ALERT_LED;
i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
return count;
}
+static DEVICE_ATTR(alert_led, 0644, show_alert_led, store_alert_led);
+
static struct sensor_device_attribute fschmd_attr[] = {
SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
- SENSOR_ATTR(alert_led, 0644, show_alert_led, store_alert_led, 0),
+ SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
+ SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
+ SENSOR_ATTR(in5_input, 0444, show_in_value, NULL, 5),
};
static struct sensor_device_attribute fschmd_temp_attr[] = {
SENSOR_ATTR(temp5_max, 0644, show_temp_max, store_temp_max, 4),
SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
+ SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
+ SENSOR_ATTR(temp6_max, 0644, show_temp_max, store_temp_max, 5),
+ SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
+ SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
+ SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
+ SENSOR_ATTR(temp7_max, 0644, show_temp_max, store_temp_max, 6),
+ SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
+ SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
+ SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
+ SENSOR_ATTR(temp8_max, 0644, show_temp_max, store_temp_max, 7),
+ SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
+ SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
+ SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
+ SENSOR_ATTR(temp9_max, 0644, show_temp_max, store_temp_max, 8),
+ SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
+ SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
+ SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
+ SENSOR_ATTR(temp10_max, 0644, show_temp_max, store_temp_max, 9),
+ SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
+ SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
+ SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
+ SENSOR_ATTR(temp11_max, 0644, show_temp_max, store_temp_max, 10),
+ SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
+ SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
};
static struct sensor_device_attribute fschmd_fan_attr[] = {
SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
SENSOR_ATTR(pwm6_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
store_pwm_auto_point1_pwm, 5),
+ SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
+ SENSOR_ATTR(fan7_div, 0644, show_fan_div, store_fan_div, 6),
+ SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
+ SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
+ SENSOR_ATTR(pwm7_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 6),
};
/*
- * Real code
+ * Watchdog routines
+ */
+
+static int watchdog_set_timeout(struct fschmd_data *data, int timeout)
+{
+ int ret, resolution;
+ int kind = data->kind + 1; /* 0-x array index -> 1-x module param */
+
+ /* 2 second or 60 second resolution? */
+ if (timeout <= 510 || kind == fscpos || kind == fscscy)
+ resolution = 2;
+ else
+ resolution = 60;
+
+ if (timeout < resolution || timeout > (resolution * 255))
+ return -EINVAL;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ if (resolution == 2)
+ data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_RESOLUTION;
+ else
+ data->watchdog_control |= FSCHMD_WDOG_CONTROL_RESOLUTION;
+
+ data->watchdog_preset = DIV_ROUND_UP(timeout, resolution);
+
+ /* Write new timeout value */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_PRESET[data->kind], data->watchdog_preset);
+ /* Write new control register, do not trigger! */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control & ~FSCHMD_WDOG_CONTROL_TRIGGER);
+
+ ret = data->watchdog_preset * resolution;
+
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+static int watchdog_get_timeout(struct fschmd_data *data)
+{
+ int timeout;
+
+ mutex_lock(&data->watchdog_lock);
+ if (data->watchdog_control & FSCHMD_WDOG_CONTROL_RESOLUTION)
+ timeout = data->watchdog_preset * 60;
+ else
+ timeout = data->watchdog_preset * 2;
+ mutex_unlock(&data->watchdog_lock);
+
+ return timeout;
+}
+
+static int watchdog_trigger(struct fschmd_data *data)
+{
+ int ret = 0;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ data->watchdog_control |= FSCHMD_WDOG_CONTROL_TRIGGER;
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control);
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+static int watchdog_stop(struct fschmd_data *data)
+{
+ int ret = 0;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_STARTED;
+ /* Don't store the stop flag in our watchdog control register copy, as
+ its a write only bit (read always returns 0) */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control | FSCHMD_WDOG_CONTROL_STOP);
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+static int watchdog_open(struct inode *inode, struct file *filp)
+{
+ struct fschmd_data *pos, *data = NULL;
+
+ /* We get called from drivers/char/misc.c with misc_mtx hold, and we
+ call misc_register() from fschmd_probe() with watchdog_data_mutex
+ hold, as misc_register() takes the misc_mtx lock, this is a possible
+ deadlock, so we use mutex_trylock here. */
+ if (!mutex_trylock(&watchdog_data_mutex))
+ return -ERESTARTSYS;
+ list_for_each_entry(pos, &watchdog_data_list, list) {
+ if (pos->watchdog_miscdev.minor == iminor(inode)) {
+ data = pos;
+ break;
+ }
+ }
+ /* Note we can never not have found data, so we don't check for this */
+ kref_get(&data->kref);
+ mutex_unlock(&watchdog_data_mutex);
+
+ if (test_and_set_bit(0, &data->watchdog_is_open))
+ return -EBUSY;
+
+ /* Start the watchdog */
+ watchdog_trigger(data);
+ filp->private_data = data;
+
+ return nonseekable_open(inode, filp);
+}
+
+static int watchdog_release(struct inode *inode, struct file *filp)
+{
+ struct fschmd_data *data = filp->private_data;
+
+ if (data->watchdog_expect_close) {
+ watchdog_stop(data);
+ data->watchdog_expect_close = 0;
+ } else {
+ watchdog_trigger(data);
+ dev_crit(&data->client->dev,
+ "unexpected close, not stopping watchdog!\n");
+ }
+
+ clear_bit(0, &data->watchdog_is_open);
+
+ mutex_lock(&watchdog_data_mutex);
+ kref_put(&data->kref, fschmd_release_resources);
+ mutex_unlock(&watchdog_data_mutex);
+
+ return 0;
+}
+
+static ssize_t watchdog_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ size_t ret;
+ struct fschmd_data *data = filp->private_data;
+
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* Clear it in case it was set with a previous write */
+ data->watchdog_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ data->watchdog_expect_close = 1;
+ }
+ }
+ ret = watchdog_trigger(data);
+ if (ret < 0)
+ return ret;
+ }
+ return count;
+}
+
+static int watchdog_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_CARDRESET,
+ .identity = "FSC watchdog"
+ };
+ int i, ret = 0;
+ struct fschmd_data *data = filp->private_data;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ident.firmware_version = data->revision;
+ if (!nowayout)
+ ident.options |= WDIOF_MAGICCLOSE;
+ if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
+ ret = -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int __user *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ if (data->watchdog_state & FSCHMD_WDOG_STATE_CARDRESET)
+ ret = put_user(WDIOF_CARDRESET, (int __user *)arg);
+ else
+ ret = put_user(0, (int __user *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ ret = watchdog_trigger(data);
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ i = watchdog_get_timeout(data);
+ ret = put_user(i, (int __user *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(i, (int __user *)arg)) {
+ ret = -EFAULT;
+ break;
+ }
+ ret = watchdog_set_timeout(data, i);
+ if (ret > 0)
+ ret = put_user(ret, (int __user *)arg);
+ break;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(i, (int __user *)arg)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ if (i & WDIOS_DISABLECARD)
+ ret = watchdog_stop(data);
+ else if (i & WDIOS_ENABLECARD)
+ ret = watchdog_trigger(data);
+ else
+ ret = -EINVAL;
+
+ break;
+ default:
+ ret = -ENOTTY;
+ }
+
+ return ret;
+}
+
+static struct file_operations watchdog_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = watchdog_open,
+ .release = watchdog_release,
+ .write = watchdog_write,
+ .ioctl = watchdog_ioctl,
+};
+
+
+/*
+ * Detect, register, unregister and update device functions
*/
/* DMI decode routine to read voltage scaling factors from special DMI tables,
which are available on FSC machines with an fscher or later chip. */
-static void fschmd_dmi_decode(const struct dmi_header *header)
+static void fschmd_dmi_decode(const struct dmi_header *header, void *dummy)
{
int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
dmi_mult[i] = mult[i] * 10;
dmi_offset[i] = offset[i] * 10;
}
+ /* According to the docs there should be separate dmi entries
+ for the mult's and offsets of in3-5 of the syl, but on
+ my test machine these are not present */
+ dmi_mult[3] = dmi_mult[2];
+ dmi_mult[4] = dmi_mult[1];
+ dmi_mult[5] = dmi_mult[2];
+ dmi_offset[3] = dmi_offset[2];
+ dmi_offset[4] = dmi_offset[1];
+ dmi_offset[5] = dmi_offset[2];
dmi_vref = vref;
}
}
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
- const char * const client_names[5] = { "fscpos", "fscher", "fscscy",
- "fschrc", "fschmd" };
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
kind = fschrc;
else if (!strcmp(id, "HMD"))
kind = fschmd;
+ else if (!strcmp(id, "HDS"))
+ kind = fschds;
+ else if (!strcmp(id, "SYL"))
+ kind = fscsyl;
else
return -ENODEV;
}
- strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE);
+ strlcpy(info->type, fschmd_id[kind - 1].name, I2C_NAME_SIZE);
return 0;
}
const struct i2c_device_id *id)
{
struct fschmd_data *data;
- u8 revision;
- const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
- "Heracles", "Heimdall" };
+ const char * const names[7] = { "Poseidon", "Hermes", "Scylla",
+ "Heracles", "Heimdall", "Hades", "Syleus" };
+ const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
int i, err;
enum chips kind = id->driver_data;
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
+ mutex_init(&data->watchdog_lock);
+ INIT_LIST_HEAD(&data->list);
+ kref_init(&data->kref);
+ /* Store client pointer in our data struct for watchdog usage
+ (where the client is found through a data ptr instead of the
+ otherway around) */
+ data->client = client;
if (kind == fscpos) {
/* The Poseidon has hardwired temp limits, fill these
}
/* Read the special DMI table for fscher and newer chips */
- if (kind == fscher || kind >= fschrc) {
- dmi_walk(fschmd_dmi_decode);
+ if ((kind == fscher || kind >= fschrc) && dmi_vref == -1) {
+ dmi_walk(fschmd_dmi_decode, NULL);
if (dmi_vref == -1) {
- printk(KERN_WARNING FSCHMD_NAME
- ": Couldn't get voltage scaling factors from "
+ dev_warn(&client->dev,
+ "Couldn't get voltage scaling factors from "
"BIOS DMI table, using builtin defaults\n");
dmi_vref = 33;
}
}
- /* i2c kind goes from 1-5, we want from 0-4 to address arrays */
+ /* i2c kind goes from 1-6, we want from 0-5 to address arrays */
data->kind = kind - 1;
- for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) {
+ /* Read in some never changing registers */
+ data->revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
+ data->global_control = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_CONTROL);
+ data->watchdog_control = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind]);
+ data->watchdog_state = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_STATE[data->kind]);
+ data->watchdog_preset = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_PRESET[data->kind]);
+
+ err = device_create_file(&client->dev, &dev_attr_alert_led);
+ if (err)
+ goto exit_detach;
+
+ for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++) {
err = device_create_file(&client->dev,
&fschmd_attr[i].dev_attr);
if (err)
show_temp_max)
continue;
+ if (kind == fscsyl) {
+ if (i % 4 == 0)
+ data->temp_status[i / 4] =
+ i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_TEMP_STATE
+ [data->kind][i / 4]);
+ if (data->temp_status[i / 4] & FSCHMD_TEMP_DISABLED)
+ continue;
+ }
+
err = device_create_file(&client->dev,
&fschmd_temp_attr[i].dev_attr);
if (err)
"pwm3_auto_point1_pwm"))
continue;
+ if (kind == fscsyl) {
+ if (i % 5 == 0)
+ data->fan_status[i / 5] =
+ i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_FAN_STATE
+ [data->kind][i / 5]);
+ if (data->fan_status[i / 5] & FSCHMD_FAN_DISABLED)
+ continue;
+ }
+
err = device_create_file(&client->dev,
&fschmd_fan_attr[i].dev_attr);
if (err)
goto exit_detach;
}
- revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
- printk(KERN_INFO FSCHMD_NAME ": Detected FSC %s chip, revision: %d\n",
- names[data->kind], (int) revision);
+ /* We take the data_mutex lock early so that watchdog_open() cannot
+ run when misc_register() has completed, but we've not yet added
+ our data to the watchdog_data_list (and set the default timeout) */
+ mutex_lock(&watchdog_data_mutex);
+ for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
+ /* Register our watchdog part */
+ snprintf(data->watchdog_name, sizeof(data->watchdog_name),
+ "watchdog%c", (i == 0) ? '\0' : ('0' + i));
+ data->watchdog_miscdev.name = data->watchdog_name;
+ data->watchdog_miscdev.fops = &watchdog_fops;
+ data->watchdog_miscdev.minor = watchdog_minors[i];
+ err = misc_register(&data->watchdog_miscdev);
+ if (err == -EBUSY)
+ continue;
+ if (err) {
+ data->watchdog_miscdev.minor = 0;
+ dev_err(&client->dev,
+ "Registering watchdog chardev: %d\n", err);
+ break;
+ }
+
+ list_add(&data->list, &watchdog_data_list);
+ watchdog_set_timeout(data, 60);
+ dev_info(&client->dev,
+ "Registered watchdog chardev major 10, minor: %d\n",
+ watchdog_minors[i]);
+ break;
+ }
+ if (i == ARRAY_SIZE(watchdog_minors)) {
+ data->watchdog_miscdev.minor = 0;
+ dev_warn(&client->dev, "Couldn't register watchdog chardev "
+ "(due to no free minor)\n");
+ }
+ mutex_unlock(&watchdog_data_mutex);
+
+ dev_info(&client->dev, "Detected FSC %s chip, revision: %d\n",
+ names[data->kind], (int) data->revision);
return 0;
struct fschmd_data *data = i2c_get_clientdata(client);
int i;
+ /* Unregister the watchdog (if registered) */
+ if (data->watchdog_miscdev.minor) {
+ misc_deregister(&data->watchdog_miscdev);
+ if (data->watchdog_is_open) {
+ dev_warn(&client->dev,
+ "i2c client detached with watchdog open! "
+ "Stopping watchdog.\n");
+ watchdog_stop(data);
+ }
+ mutex_lock(&watchdog_data_mutex);
+ list_del(&data->list);
+ mutex_unlock(&watchdog_data_mutex);
+ /* Tell the watchdog code the client is gone */
+ mutex_lock(&data->watchdog_lock);
+ data->client = NULL;
+ mutex_unlock(&data->watchdog_lock);
+ }
+
/* Check if registered in case we're called from fschmd_detect
to cleanup after an error */
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
- for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++)
+ device_remove_file(&client->dev, &dev_attr_alert_led);
+ for (i = 0; i < (FSCHMD_NO_VOLT_SENSORS[data->kind]); i++)
device_remove_file(&client->dev, &fschmd_attr[i].dev_attr);
for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++)
device_remove_file(&client->dev,
device_remove_file(&client->dev,
&fschmd_fan_attr[i].dev_attr);
- kfree(data);
+ mutex_lock(&watchdog_data_mutex);
+ kref_put(&data->kref, fschmd_release_resources);
+ mutex_unlock(&watchdog_data_mutex);
+
return 0;
}
data->temp_act[i] < data->temp_max[i])
i2c_smbus_write_byte_data(client,
FSCHMD_REG_TEMP_STATE[data->kind][i],
- FSCHMD_TEMP_ALERT_MASK);
+ data->temp_status[i]);
}
for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) {
FSCHMD_REG_FAN_MIN[data->kind][i]);
/* reset fan status if speed is back to > 0 */
- if ((data->fan_status[i] & FSCHMD_FAN_ALARM_MASK) &&
+ if ((data->fan_status[i] & FSCHMD_FAN_ALARM) &&
data->fan_act[i])
i2c_smbus_write_byte_data(client,
FSCHMD_REG_FAN_STATE[data->kind][i],
- FSCHMD_FAN_ALARM_MASK);
+ data->fan_status[i]);
}
- for (i = 0; i < 3; i++)
+ for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++)
data->volt[i] = i2c_smbus_read_byte_data(client,
- FSCHMD_REG_VOLT[i]);
-
- data->global_control = i2c_smbus_read_byte_data(client,
- FSCHMD_REG_CONTROL);
-
- /* To be implemented in the future
- data->watchdog[0] = i2c_smbus_read_byte_data(client,
- FSCHMD_REG_WDOG_PRESET);
- data->watchdog[1] = i2c_smbus_read_byte_data(client,
- FSCHMD_REG_WDOG_STATE);
- data->watchdog[2] = i2c_smbus_read_byte_data(client,
- FSCHMD_REG_WDOG_CONTROL); */
+ FSCHMD_REG_VOLT[data->kind][i]);
data->last_updated = jiffies;
data->valid = 1;
i2c_del_driver(&fschmd_driver);
}
-MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
-MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles and "
- "Heimdall driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles, Heimdall, Hades "
+ "and Syleus driver");
MODULE_LICENSE("GPL");
module_init(fschmd_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff