// SPDX-License-Identifier: GPL-2.0-or-later /* * fschmd.c * * Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com> */ /* * Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes, * 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: * Copyright (C) 2006 Thilo Cestonaro * <thilo.cestonaro.external@fujitsu-siemens.com> * Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch> * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de> * Copyright (c) 2001 Martin Knoblauch <mkn@teraport.de, knobi@knobisoft.de> * Copyright (C) 2000 Hermann Jung <hej@odn.de> */ #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/err.h> #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 */ static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" <------>__MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); enum chips { fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl }; /* * The FSCHMD registers and other defines */ /* chip identification */ #define FSCHMD_REG_IDENT_0 0x00 #define FSCHMD_REG_IDENT_1 0x01 #define FSCHMD_REG_IDENT_2 0x02 #define FSCHMD_REG_REVISION 0x03 /* global control and status */ #define FSCHMD_REG_EVENT_STATE 0x04 #define FSCHMD_REG_CONTROL 0x05 #define FSCHMD_CONTROL_ALERT_LED 0x01 /* 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[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 be 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[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[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[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[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[7] = { 3, 3, 6, 4, 5, 5, 7 }; /* Fan status register bitmasks */ #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[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[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 * there with field testing on the fscher and fschrc, already supported / used * 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[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[7] = { 3, 3, 4, 3, 5, 5, 11 }; /* temp status register bitmasks */ #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 | FSCHMD_TEMP_ALERT) /* * Functions declarations */ static int fschmd_probe(struct i2c_client *client); static int fschmd_detect(struct i2c_client *client, <------><------><------> struct i2c_board_info *info); static int fschmd_remove(struct i2c_client *client); static struct fschmd_data *fschmd_update_device(struct device *dev); /* * Driver data (common to all clients) */ static const struct i2c_device_id fschmd_id[] = { <------>{ "fscpos", fscpos }, <------>{ "fscher", fscher }, <------>{ "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", <------>}, <------>.probe_new = fschmd_probe, <------>.remove = fschmd_remove, <------>.id_table = fschmd_id, <------>.detect = fschmd_detect, <------>.address_list = normal_i2c, }; /* * Client data (each client gets its own) */ 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; <------>enum chips 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 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. 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 */ static ssize_t in_value_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>const int max_reading[3] = { 14200, 6600, 3300 }; <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>if (data->kind == fscher || data->kind >= fschrc) <------><------>return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref * <------><------><------>dmi_mult[index]) / 255 + dmi_offset[index]); <------>else <------><------>return sprintf(buf, "%d\n", (data->volt[index] * <------><------><------>max_reading[index] + 128) / 255); } #define TEMP_FROM_REG(val) (((val) - 128) * 1000) static ssize_t temp_value_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[index])); } static ssize_t temp_max_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); } static ssize_t temp_max_store(struct device *dev, <------><------><------> struct device_attribute *devattr, <------><------><------> const char *buf, size_t count) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = dev_get_drvdata(dev); <------>long v; <------>int err; <------>err = kstrtol(buf, 10, &v); <------>if (err) <------><------>return err; <------>v = clamp_val(v / 1000, -128, 127) + 128; <------>mutex_lock(&data->update_lock); <------>i2c_smbus_write_byte_data(to_i2c_client(dev), <------><------>FSCHMD_REG_TEMP_LIMIT[data->kind][index], v); <------>data->temp_max[index] = v; <------>mutex_unlock(&data->update_lock); <------>return count; } static ssize_t temp_fault_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>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) <------><------>return sprintf(buf, "0\n"); <------>else <------><------>return sprintf(buf, "1\n"); } static ssize_t temp_alarm_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>if ((data->temp_status[index] & FSCHMD_TEMP_ALARM_MASK) == <------><------><------>FSCHMD_TEMP_ALARM_MASK) <------><------>return sprintf(buf, "1\n"); <------>else <------><------>return sprintf(buf, "0\n"); } #define RPM_FROM_REG(val) ((val) * 60) static ssize_t fan_value_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[index])); } static ssize_t fan_div_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>/* bits 2..7 reserved => mask with 3 */ <------>return sprintf(buf, "%d\n", 1 << (data->fan_ripple[index] & 3)); } static ssize_t fan_div_store(struct device *dev, <------><------><------> struct device_attribute *devattr, <------><------><------> const char *buf, size_t count) { <------>u8 reg; <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = dev_get_drvdata(dev); <------>/* supported values: 2, 4, 8 */ <------>unsigned long v; <------>int err; <------>err = kstrtoul(buf, 10, &v); <------>if (err) <------><------>return err; <------>switch (v) { <------>case 2: <------><------>v = 1; <------><------>break; <------>case 4: <------><------>v = 2; <------><------>break; <------>case 8: <------><------>v = 3; <------><------>break; <------>default: <------><------>dev_err(dev, <------><------><------>"fan_div value %lu not supported. Choose one of 2, 4 or 8!\n", <------><------><------>v); <------><------>return -EINVAL; <------>} <------>mutex_lock(&data->update_lock); <------>reg = i2c_smbus_read_byte_data(to_i2c_client(dev), <------><------>FSCHMD_REG_FAN_RIPPLE[data->kind][index]); <------>/* bits 2..7 reserved => mask with 0x03 */ <------>reg &= ~0x03; <------>reg |= v; <------>i2c_smbus_write_byte_data(to_i2c_client(dev), <------><------>FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg); <------>data->fan_ripple[index] = reg; <------>mutex_unlock(&data->update_lock); <------>return count; } static ssize_t fan_alarm_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>if (data->fan_status[index] & FSCHMD_FAN_ALARM) <------><------>return sprintf(buf, "1\n"); <------>else <------><------>return sprintf(buf, "0\n"); } static ssize_t fan_fault_show(struct device *dev, <------><------><------> struct device_attribute *devattr, char *buf) { <------>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) <------><------>return sprintf(buf, "1\n"); <------>else <------><------>return sprintf(buf, "0\n"); } static ssize_t pwm_auto_point1_pwm_show(struct device *dev, <------><------><------><------><------>struct device_attribute *devattr, <------><------><------><------><------>char *buf) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = fschmd_update_device(dev); <------>int val = data->fan_min[index]; <------>/* 0 = allow turning off (except on the syl), 1-255 = 50-100% */ <------>if (val || data->kind == fscsyl) <------><------>val = val / 2 + 128; <------>return sprintf(buf, "%d\n", val); } static ssize_t pwm_auto_point1_pwm_store(struct device *dev, <------><------><------><------><------> struct device_attribute *devattr, <------><------><------><------><------> const char *buf, size_t count) { <------>int index = to_sensor_dev_attr(devattr)->index; <------>struct fschmd_data *data = dev_get_drvdata(dev); <------>unsigned long v; <------>int err; <------>err = kstrtoul(buf, 10, &v); <------>if (err) <------><------>return err; <------>/* reg: 0 = allow turning off (except on the syl), 1-255 = 50-100% */ <------>if (v || data->kind == fscsyl) { <------><------>v = clamp_val(v, 128, 255); <------><------>v = (v - 128) * 2 + 1; <------>} <------>mutex_lock(&data->update_lock); <------>i2c_smbus_write_byte_data(to_i2c_client(dev), <------><------>FSCHMD_REG_FAN_MIN[data->kind][index], v); <------>data->fan_min[index] = v; <------>mutex_unlock(&data->update_lock); <------>return count; } /* * The FSC hwmon family has the ability to force an attached alert led to flash * from software, we export this as an alert_led sysfs attr */ static ssize_t alert_led_show(struct device *dev, <------>struct device_attribute *devattr, char *buf) { <------>struct fschmd_data *data = fschmd_update_device(dev); <------>if (data->global_control & FSCHMD_CONTROL_ALERT_LED) <------><------>return sprintf(buf, "1\n"); <------>else <------><------>return sprintf(buf, "0\n"); } static ssize_t alert_led_store(struct device *dev, <------>struct device_attribute *devattr, const char *buf, size_t count) { <------>u8 reg; <------>struct fschmd_data *data = dev_get_drvdata(dev); <------>unsigned long v; <------>int err; <------>err = kstrtoul(buf, 10, &v); <------>if (err) <------><------>return err; <------>mutex_lock(&data->update_lock); <------>reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL); <------>if (v) <------><------>reg |= FSCHMD_CONTROL_ALERT_LED; <------>else <------><------>reg &= ~FSCHMD_CONTROL_ALERT_LED; <------>i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg); <------>data->global_control = reg; <------>mutex_unlock(&data->update_lock); <------>return count; } static DEVICE_ATTR_RW(alert_led); static struct sensor_device_attribute fschmd_attr[] = { <------>SENSOR_ATTR_RO(in0_input, in_value, 0), <------>SENSOR_ATTR_RO(in1_input, in_value, 1), <------>SENSOR_ATTR_RO(in2_input, in_value, 2), <------>SENSOR_ATTR_RO(in3_input, in_value, 3), <------>SENSOR_ATTR_RO(in4_input, in_value, 4), <------>SENSOR_ATTR_RO(in5_input, in_value, 5), }; static struct sensor_device_attribute fschmd_temp_attr[] = { <------>SENSOR_ATTR_RO(temp1_input, temp_value, 0), <------>SENSOR_ATTR_RW(temp1_max, temp_max, 0), <------>SENSOR_ATTR_RO(temp1_fault, temp_fault, 0), <------>SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0), <------>SENSOR_ATTR_RO(temp2_input, temp_value, 1), <------>SENSOR_ATTR_RW(temp2_max, temp_max, 1), <------>SENSOR_ATTR_RO(temp2_fault, temp_fault, 1), <------>SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1), <------>SENSOR_ATTR_RO(temp3_input, temp_value, 2), <------>SENSOR_ATTR_RW(temp3_max, temp_max, 2), <------>SENSOR_ATTR_RO(temp3_fault, temp_fault, 2), <------>SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2), <------>SENSOR_ATTR_RO(temp4_input, temp_value, 3), <------>SENSOR_ATTR_RW(temp4_max, temp_max, 3), <------>SENSOR_ATTR_RO(temp4_fault, temp_fault, 3), <------>SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3), <------>SENSOR_ATTR_RO(temp5_input, temp_value, 4), <------>SENSOR_ATTR_RW(temp5_max, temp_max, 4), <------>SENSOR_ATTR_RO(temp5_fault, temp_fault, 4), <------>SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4), <------>SENSOR_ATTR_RO(temp6_input, temp_value, 5), <------>SENSOR_ATTR_RW(temp6_max, temp_max, 5), <------>SENSOR_ATTR_RO(temp6_fault, temp_fault, 5), <------>SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5), <------>SENSOR_ATTR_RO(temp7_input, temp_value, 6), <------>SENSOR_ATTR_RW(temp7_max, temp_max, 6), <------>SENSOR_ATTR_RO(temp7_fault, temp_fault, 6), <------>SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6), <------>SENSOR_ATTR_RO(temp8_input, temp_value, 7), <------>SENSOR_ATTR_RW(temp8_max, temp_max, 7), <------>SENSOR_ATTR_RO(temp8_fault, temp_fault, 7), <------>SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7), <------>SENSOR_ATTR_RO(temp9_input, temp_value, 8), <------>SENSOR_ATTR_RW(temp9_max, temp_max, 8), <------>SENSOR_ATTR_RO(temp9_fault, temp_fault, 8), <------>SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8), <------>SENSOR_ATTR_RO(temp10_input, temp_value, 9), <------>SENSOR_ATTR_RW(temp10_max, temp_max, 9), <------>SENSOR_ATTR_RO(temp10_fault, temp_fault, 9), <------>SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9), <------>SENSOR_ATTR_RO(temp11_input, temp_value, 10), <------>SENSOR_ATTR_RW(temp11_max, temp_max, 10), <------>SENSOR_ATTR_RO(temp11_fault, temp_fault, 10), <------>SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10), }; static struct sensor_device_attribute fschmd_fan_attr[] = { <------>SENSOR_ATTR_RO(fan1_input, fan_value, 0), <------>SENSOR_ATTR_RW(fan1_div, fan_div, 0), <------>SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0), <------>SENSOR_ATTR_RO(fan1_fault, fan_fault, 0), <------>SENSOR_ATTR_RW(pwm1_auto_point1_pwm, pwm_auto_point1_pwm, 0), <------>SENSOR_ATTR_RO(fan2_input, fan_value, 1), <------>SENSOR_ATTR_RW(fan2_div, fan_div, 1), <------>SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1), <------>SENSOR_ATTR_RO(fan2_fault, fan_fault, 1), <------>SENSOR_ATTR_RW(pwm2_auto_point1_pwm, pwm_auto_point1_pwm, 1), <------>SENSOR_ATTR_RO(fan3_input, fan_value, 2), <------>SENSOR_ATTR_RW(fan3_div, fan_div, 2), <------>SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2), <------>SENSOR_ATTR_RO(fan3_fault, fan_fault, 2), <------>SENSOR_ATTR_RW(pwm3_auto_point1_pwm, pwm_auto_point1_pwm, 2), <------>SENSOR_ATTR_RO(fan4_input, fan_value, 3), <------>SENSOR_ATTR_RW(fan4_div, fan_div, 3), <------>SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3), <------>SENSOR_ATTR_RO(fan4_fault, fan_fault, 3), <------>SENSOR_ATTR_RW(pwm4_auto_point1_pwm, pwm_auto_point1_pwm, 3), <------>SENSOR_ATTR_RO(fan5_input, fan_value, 4), <------>SENSOR_ATTR_RW(fan5_div, fan_div, 4), <------>SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4), <------>SENSOR_ATTR_RO(fan5_fault, fan_fault, 4), <------>SENSOR_ATTR_RW(pwm5_auto_point1_pwm, pwm_auto_point1_pwm, 4), <------>SENSOR_ATTR_RO(fan6_input, fan_value, 5), <------>SENSOR_ATTR_RW(fan6_div, fan_div, 5), <------>SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5), <------>SENSOR_ATTR_RO(fan6_fault, fan_fault, 5), <------>SENSOR_ATTR_RW(pwm6_auto_point1_pwm, pwm_auto_point1_pwm, 5), <------>SENSOR_ATTR_RO(fan7_input, fan_value, 6), <------>SENSOR_ATTR_RW(fan7_div, fan_div, 6), <------>SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6), <------>SENSOR_ATTR_RO(fan7_fault, fan_fault, 6), <------>SENSOR_ATTR_RW(pwm7_auto_point1_pwm, pwm_auto_point1_pwm, 6), }; /* * 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; <------>int watchdog_is_open; <------>/* <------> * 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 */ <------>watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open); <------>if (!watchdog_is_open) <------><------>kref_get(&data->kref); <------>mutex_unlock(&watchdog_data_mutex); <------>if (watchdog_is_open) <------><------>return -EBUSY; <------>/* Start the watchdog */ <------>watchdog_trigger(data); <------>filp->private_data = data; <------>return stream_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) { <------>int 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 long watchdog_ioctl(struct file *filp, unsigned int cmd, <------><------><------> unsigned long arg) { <------>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 const struct file_operations watchdog_fops = { <------>.owner = THIS_MODULE, <------>.llseek = no_llseek, <------>.open = watchdog_open, <------>.release = watchdog_release, <------>.write = watchdog_write, <------>.unlocked_ioctl = watchdog_ioctl, <------>.compat_ioctl = compat_ptr_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, void *dummy) { <------>int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0; <------>/* <------> * dmi code ugliness, we get passed the address of the contents of <------> * a complete DMI record, but in the form of a dmi_header pointer, in <------> * reality this address holds header->length bytes of which the header <------> * are the first 4 bytes <------> */ <------>u8 *dmi_data = (u8 *)header; <------>/* We are looking for OEM-specific type 185 */ <------>if (header->type != 185) <------><------>return; <------>/* <------> * we are looking for what Siemens calls "subtype" 19, the subtype <------> * is stored in byte 5 of the dmi block <------> */ <------>if (header->length < 5 || dmi_data[4] != 19) <------><------>return; <------>/* <------> * After the subtype comes 1 unknown byte and then blocks of 5 bytes, <------> * consisting of what Siemens calls an "Entity" number, followed by <------> * 2 16-bit words in LSB first order <------> */ <------>for (i = 6; (i + 4) < header->length; i += 5) { <------><------>/* entity 1 - 3: voltage multiplier and offset */ <------><------>if (dmi_data[i] >= 1 && dmi_data[i] <= 3) { <------><------><------>/* Our in sensors order and the DMI order differ */ <------><------><------>const int shuffle[3] = { 1, 0, 2 }; <------><------><------>int in = shuffle[dmi_data[i] - 1]; <------><------><------>/* Check for twice the same entity */ <------><------><------>if (found & (1 << in)) <------><------><------><------>return; <------><------><------>mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8); <------><------><------>offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8); <------><------><------>found |= 1 << in; <------><------>} <------><------>/* entity 7: reference voltage */ <------><------>if (dmi_data[i] == 7) { <------><------><------>/* Check for twice the same entity */ <------><------><------>if (found & 0x08) <------><------><------><------>return; <------><------><------>vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8); <------><------><------>found |= 0x08; <------><------>} <------>} <------>if (found == 0x0F) { <------><------>for (i = 0; i < 3; i++) { <------><------><------>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; <------>} } static int fschmd_detect(struct i2c_client *client, <------><------><------> struct i2c_board_info *info) { <------>enum chips kind; <------>struct i2c_adapter *adapter = client->adapter; <------>char id[4]; <------>if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) <------><------>return -ENODEV; <------>/* Detect & Identify the chip */ <------>id[0] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_0); <------>id[1] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_1); <------>id[2] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_2); <------>id[3] = '\0'; <------>if (!strcmp(id, "PEG")) <------><------>kind = fscpos; <------>else if (!strcmp(id, "HER")) <------><------>kind = fscher; <------>else if (!strcmp(id, "SCY")) <------><------>kind = fscscy; <------>else if (!strcmp(id, "HRC")) <------><------>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, fschmd_id[kind].name, I2C_NAME_SIZE); <------>return 0; } static int fschmd_probe(struct i2c_client *client) { <------>struct fschmd_data *data; <------>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 = i2c_match_id(fschmd_id, client)->driver_data; <------>data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL); <------>if (!data) <------><------>return -ENOMEM; <------>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; <------>data->kind = kind; <------>if (kind == fscpos) { <------><------>/* <------><------> * The Poseidon has hardwired temp limits, fill these <------><------> * in for the alarm resetting code <------><------> */ <------><------>data->temp_max[0] = 70 + 128; <------><------>data->temp_max[1] = 50 + 128; <------><------>data->temp_max[2] = 50 + 128; <------>} <------>/* Read the special DMI table for fscher and newer chips */ <------>if ((kind == fscher || kind >= fschrc) && dmi_vref == -1) { <------><------>dmi_walk(fschmd_dmi_decode, NULL); <------><------>if (dmi_vref == -1) { <------><------><------>dev_warn(&client->dev, <------><------><------><------>"Couldn't get voltage scaling factors from " <------><------><------><------>"BIOS DMI table, using builtin defaults\n"); <------><------><------>dmi_vref = 33; <------><------>} <------>} <------>/* 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) <------><------><------>goto exit_detach; <------>} <------>for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++) { <------><------>/* Poseidon doesn't have TEMP_LIMIT registers */ <------><------>if (kind == fscpos && fschmd_temp_attr[i].dev_attr.show == <------><------><------><------>temp_max_show) <------><------><------>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) <------><------><------>goto exit_detach; <------>} <------>for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) { <------><------>/* Poseidon doesn't have a FAN_MIN register for its 3rd fan */ <------><------>if (kind == fscpos && <------><------><------><------>!strcmp(fschmd_fan_attr[i].dev_attr.attr.name, <------><------><------><------><------>"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; <------>} <------>data->hwmon_dev = hwmon_device_register(&client->dev); <------>if (IS_ERR(data->hwmon_dev)) { <------><------>err = PTR_ERR(data->hwmon_dev); <------><------>data->hwmon_dev = NULL; <------><------>goto exit_detach; <------>} <------>/* <------> * 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; exit_detach: <------>fschmd_remove(client); /* will also free data for us */ <------>return err; } static int fschmd_remove(struct i2c_client *client) { <------>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); <------>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, <------><------><------><------><------>&fschmd_temp_attr[i].dev_attr); <------>for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) <------><------>device_remove_file(&client->dev, <------><------><------><------><------>&fschmd_fan_attr[i].dev_attr); <------>mutex_lock(&watchdog_data_mutex); <------>kref_put(&data->kref, fschmd_release_resources); <------>mutex_unlock(&watchdog_data_mutex); <------>return 0; } static struct fschmd_data *fschmd_update_device(struct device *dev) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct fschmd_data *data = i2c_get_clientdata(client); <------>int i; <------>mutex_lock(&data->update_lock); <------>if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { <------><------>for (i = 0; i < FSCHMD_NO_TEMP_SENSORS[data->kind]; i++) { <------><------><------>data->temp_act[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------>FSCHMD_REG_TEMP_ACT[data->kind][i]); <------><------><------>data->temp_status[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------>FSCHMD_REG_TEMP_STATE[data->kind][i]); <------><------><------>/* The fscpos doesn't have TEMP_LIMIT registers */ <------><------><------>if (FSCHMD_REG_TEMP_LIMIT[data->kind][i]) <------><------><------><------>data->temp_max[i] = i2c_smbus_read_byte_data( <------><------><------><------><------>client, <------><------><------><------><------>FSCHMD_REG_TEMP_LIMIT[data->kind][i]); <------><------><------>/* <------><------><------> * reset alarm if the alarm condition is gone, <------><------><------> * the chip doesn't do this itself <------><------><------> */ <------><------><------>if ((data->temp_status[i] & FSCHMD_TEMP_ALARM_MASK) == <------><------><------><------><------>FSCHMD_TEMP_ALARM_MASK && <------><------><------><------><------>data->temp_act[i] < data->temp_max[i]) <------><------><------><------>i2c_smbus_write_byte_data(client, <------><------><------><------><------>FSCHMD_REG_TEMP_STATE[data->kind][i], <------><------><------><------><------>data->temp_status[i]); <------><------>} <------><------>for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) { <------><------><------>data->fan_act[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------>FSCHMD_REG_FAN_ACT[data->kind][i]); <------><------><------>data->fan_status[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------>FSCHMD_REG_FAN_STATE[data->kind][i]); <------><------><------>data->fan_ripple[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------>FSCHMD_REG_FAN_RIPPLE[data->kind][i]); <------><------><------>/* The fscpos third fan doesn't have a fan_min */ <------><------><------>if (FSCHMD_REG_FAN_MIN[data->kind][i]) <------><------><------><------>data->fan_min[i] = i2c_smbus_read_byte_data( <------><------><------><------><------>client, <------><------><------><------><------>FSCHMD_REG_FAN_MIN[data->kind][i]); <------><------><------>/* reset fan status if speed is back to > 0 */ <------><------><------>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], <------><------><------><------><------>data->fan_status[i]); <------><------>} <------><------>for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++) <------><------><------>data->volt[i] = i2c_smbus_read_byte_data(client, <------><------><------><------><------> FSCHMD_REG_VOLT[data->kind][i]); <------><------>data->last_updated = jiffies; <------><------>data->valid = 1; <------>} <------>mutex_unlock(&data->update_lock); <------>return data; } module_i2c_driver(fschmd_driver); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles, Heimdall, Hades " <------><------><------>"and Syleus driver"); MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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