// SPDX-License-Identifier: GPL-2.0-or-later /* * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * Copyright (c) 1998 - 2001 Frodo Looijaard <[email protected]>, * Philip Edelbrock <[email protected]>, * and Mark Studebaker <[email protected]> * Copyright (c) 2007 - 2008 Jean Delvare <[email protected]> */ /* * Supports following chips: * * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA * as99127f 7 3 0 3 0x31 0x12c3 yes no * as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no * w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes * w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes * w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no * */ #define pr_fmt(fmt) … #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-vid.h> #include <linux/hwmon-sysfs.h> #include <linux/sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #ifdef CONFIG_ISA #include <linux/platform_device.h> #include <linux/ioport.h> #include <linux/io.h> #endif #include "lm75.h" /* Addresses to scan */ static const unsigned short normal_i2c[] = …; enum chips { … }; /* Insmod parameters */ static unsigned short force_subclients[4]; module_param_array(…); MODULE_PARM_DESC(…) …; static bool reset; module_param(reset, bool, 0); MODULE_PARM_DESC(…) …; static bool init = …; module_param(init, bool, 0); MODULE_PARM_DESC(…) …; /* Constants specified below */ /* Length of ISA address segment */ #define W83781D_EXTENT … /* Where are the ISA address/data registers relative to the base address */ #define W83781D_ADDR_REG_OFFSET … #define W83781D_DATA_REG_OFFSET … /* The device registers */ /* in nr from 0 to 8 */ #define W83781D_REG_IN_MAX(nr) … #define W83781D_REG_IN_MIN(nr) … #define W83781D_REG_IN(nr) … /* fan nr from 0 to 2 */ #define W83781D_REG_FAN_MIN(nr) … #define W83781D_REG_FAN(nr) … #define W83781D_REG_BANK … #define W83781D_REG_TEMP2_CONFIG … #define W83781D_REG_TEMP3_CONFIG … /* temp nr from 1 to 3 */ #define W83781D_REG_TEMP(nr) … #define W83781D_REG_TEMP_HYST(nr) … #define W83781D_REG_TEMP_OVER(nr) … #define W83781D_REG_CONFIG … /* Interrupt status (W83781D, AS99127F) */ #define W83781D_REG_ALARM1 … #define W83781D_REG_ALARM2 … /* Real-time status (W83782D, W83783S) */ #define W83782D_REG_ALARM1 … #define W83782D_REG_ALARM2 … #define W83782D_REG_ALARM3 … #define W83781D_REG_BEEP_CONFIG … #define W83781D_REG_BEEP_INTS1 … #define W83781D_REG_BEEP_INTS2 … #define W83781D_REG_BEEP_INTS3 … #define W83781D_REG_VID_FANDIV … #define W83781D_REG_CHIPID … #define W83781D_REG_WCHIPID … #define W83781D_REG_CHIPMAN … #define W83781D_REG_PIN … /* 782D/783S only */ #define W83781D_REG_VBAT … /* PWM 782D (1-4) and 783S (1-2) only */ static const u8 W83781D_REG_PWM[] = …; #define W83781D_REG_PWMCLK12 … #define W83781D_REG_PWMCLK34 … #define W83781D_REG_I2C_ADDR … #define W83781D_REG_I2C_SUBADDR … /* * The following are undocumented in the data sheets however we * received the information in an email from Winbond tech support */ /* Sensor selection - not on 781d */ #define W83781D_REG_SCFG1 … static const u8 BIT_SCFG1[] = …; #define W83781D_REG_SCFG2 … static const u8 BIT_SCFG2[] = …; #define W83781D_DEFAULT_BETA … /* Conversions */ #define IN_TO_REG(val) … #define IN_FROM_REG(val) … static inline u8 FAN_TO_REG(long rpm, int div) { … } static inline long FAN_FROM_REG(u8 val, int div) { … } #define TEMP_TO_REG(val) … #define TEMP_FROM_REG(val) … #define BEEP_MASK_FROM_REG(val, type) … #define BEEP_MASK_TO_REG(val, type) … #define DIV_FROM_REG(val) … static inline u8 DIV_TO_REG(long val, enum chips type) { … } struct w83781d_data { … }; static struct w83781d_data *w83781d_data_if_isa(void); static int w83781d_alias_detect(struct i2c_client *client, u8 chipid); static int w83781d_read_value(struct w83781d_data *data, u16 reg); static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value); static struct w83781d_data *w83781d_update_device(struct device *dev); static void w83781d_init_device(struct device *dev); /* following are the sysfs callback functions */ #define show_in_reg(reg) … show_in_reg(in); show_in_reg(in_min); show_in_reg(in_max); #define store_in_reg(REG, reg) … store_in_reg(MIN, min); store_in_reg(MAX, max); #define sysfs_in_offsets(offset) … sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; sysfs_in_offsets(…) …; #define show_fan_reg(reg) … show_fan_reg(fan); show_fan_reg(fan_min); static ssize_t store_fan_min(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, show_fan_min, store_fan_min, 0); static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, show_fan_min, store_fan_min, 1); static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR, show_fan_min, store_fan_min, 2); #define show_temp_reg(reg) … show_temp_reg(temp); show_temp_reg(temp_max); show_temp_reg(temp_max_hyst); #define store_temp_reg(REG, reg) … store_temp_reg(OVER, max); store_temp_reg(HYST, max_hyst); #define sysfs_temp_offsets(offset) … sysfs_temp_offsets(1); sysfs_temp_offsets(2); sysfs_temp_offsets(3); static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(cpu0_vid); static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(vrm); static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(alarms); static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { … } /* The W83781D has a single alarm bit for temp2 and temp3 */ static ssize_t show_temp3_alarm(struct device *dev, struct device_attribute *attr, char *buf) { … } static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16); static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17); static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0); static ssize_t beep_mask_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t beep_mask_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(beep_mask); static ssize_t show_beep(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_beep(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* The W83781D has a single beep bit for temp2 and temp3 */ static ssize_t show_temp3_beep(struct device *dev, struct device_attribute *attr, char *buf) { … } static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 0); static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 1); static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 2); static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 3); static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 8); static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 9); static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 10); static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 16); static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 17); static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 6); static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 7); static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 11); static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 4); static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 5); static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_temp3_beep, store_beep, 13); static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, show_beep, store_beep, 15); static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, char *buf) { … } /* * Note: we save and restore the fan minimum here, because its value is * determined in part by the fan divisor. This follows the principle of * least surprise; the user doesn't expect the fan minimum to change just * because the divisor changed. */ static ssize_t store_fan_div(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div, store_fan_div, 0); static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div, store_fan_div, 1); static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div, store_fan_div, 2); static ssize_t show_pwm(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pwm2_enable_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t store_pwm(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t pwm2_enable_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0); static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1); static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2); static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3); /* only PWM2 can be enabled/disabled */ static DEVICE_ATTR_RW(pwm2_enable); static ssize_t show_sensor(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t store_sensor(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_sensor, store_sensor, 0); static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_sensor, store_sensor, 1); static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_sensor, store_sensor, 2); /* * Assumes that adapter is of I2C, not ISA variety. * OTHERWISE DON'T CALL THIS */ static int w83781d_detect_subclients(struct i2c_client *new_client) { … } #define IN_UNIT_ATTRS(X) … #define FAN_UNIT_ATTRS(X) … #define TEMP_UNIT_ATTRS(X) … static struct attribute *w83781d_attributes[] = …; static const struct attribute_group w83781d_group = …; static struct attribute *w83781d_attributes_in1[] = …; static const struct attribute_group w83781d_group_in1 = …; static struct attribute *w83781d_attributes_in78[] = …; static const struct attribute_group w83781d_group_in78 = …; static struct attribute *w83781d_attributes_temp3[] = …; static const struct attribute_group w83781d_group_temp3 = …; static struct attribute *w83781d_attributes_pwm12[] = …; static const struct attribute_group w83781d_group_pwm12 = …; static struct attribute *w83781d_attributes_pwm34[] = …; static const struct attribute_group w83781d_group_pwm34 = …; static struct attribute *w83781d_attributes_other[] = …; static const struct attribute_group w83781d_group_other = …; /* No clean up is done on error, it's up to the caller */ static int w83781d_create_files(struct device *dev, int kind, int is_isa) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int w83781d_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static void w83781d_remove_files(struct device *dev) { … } static int w83781d_probe(struct i2c_client *client) { … } static void w83781d_remove(struct i2c_client *client) { … } static int w83781d_read_value_i2c(struct w83781d_data *data, u16 reg) { … } static int w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value) { … } static void w83781d_init_device(struct device *dev) { … } static struct w83781d_data *w83781d_update_device(struct device *dev) { … } static const struct i2c_device_id w83781d_ids[] = …; MODULE_DEVICE_TABLE(i2c, w83781d_ids); static const struct of_device_id w83781d_of_match[] = …; MODULE_DEVICE_TABLE(of, w83781d_of_match); static struct i2c_driver w83781d_driver = …; /* * ISA related code */ #ifdef CONFIG_ISA /* ISA device, if found */ static struct platform_device *pdev; static unsigned short isa_address = 0x290; /* * I2C devices get this name attribute automatically, but for ISA devices * we must create it by ourselves. */ static ssize_t name_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct w83781d_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s\n", data->name); } static DEVICE_ATTR_RO(name); static struct w83781d_data *w83781d_data_if_isa(void) { return pdev ? platform_get_drvdata(pdev) : NULL; } /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) { struct w83781d_data *isa; int i; if (!pdev) /* No ISA chip */ return 0; isa = platform_get_drvdata(pdev); if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr) return 0; /* Address doesn't match */ if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid) return 0; /* Chip type doesn't match */ /* * We compare all the limit registers, the config register and the * interrupt mask registers */ for (i = 0x2b; i <= 0x3d; i++) { if (w83781d_read_value(isa, i) != i2c_smbus_read_byte_data(client, i)) return 0; } if (w83781d_read_value(isa, W83781D_REG_CONFIG) != i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG)) return 0; for (i = 0x43; i <= 0x46; i++) { if (w83781d_read_value(isa, i) != i2c_smbus_read_byte_data(client, i)) return 0; } return 1; } static int w83781d_read_value_isa(struct w83781d_data *data, u16 reg) { int word_sized, res; word_sized = (((reg & 0xff00) == 0x100) || ((reg & 0xff00) == 0x200)) && (((reg & 0x00ff) == 0x50) || ((reg & 0x00ff) == 0x53) || ((reg & 0x00ff) == 0x55)); if (reg & 0xff00) { outb_p(W83781D_REG_BANK, data->isa_addr + W83781D_ADDR_REG_OFFSET); outb_p(reg >> 8, data->isa_addr + W83781D_DATA_REG_OFFSET); } outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET); if (word_sized) { outb_p((reg & 0xff) + 1, data->isa_addr + W83781D_ADDR_REG_OFFSET); res = (res << 8) + inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET); } if (reg & 0xff00) { outb_p(W83781D_REG_BANK, data->isa_addr + W83781D_ADDR_REG_OFFSET); outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); } return res; } static void w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value) { int word_sized; word_sized = (((reg & 0xff00) == 0x100) || ((reg & 0xff00) == 0x200)) && (((reg & 0x00ff) == 0x53) || ((reg & 0x00ff) == 0x55)); if (reg & 0xff00) { outb_p(W83781D_REG_BANK, data->isa_addr + W83781D_ADDR_REG_OFFSET); outb_p(reg >> 8, data->isa_addr + W83781D_DATA_REG_OFFSET); } outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); if (word_sized) { outb_p(value >> 8, data->isa_addr + W83781D_DATA_REG_OFFSET); outb_p((reg & 0xff) + 1, data->isa_addr + W83781D_ADDR_REG_OFFSET); } outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET); if (reg & 0xff00) { outb_p(W83781D_REG_BANK, data->isa_addr + W83781D_ADDR_REG_OFFSET); outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); } } /* * The SMBus locks itself, usually, but nothing may access the Winbond between * bank switches. ISA access must always be locked explicitly! * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, * would slow down the W83781D access and should not be necessary. * There are some ugly typecasts here, but the good news is - they should * nowhere else be necessary! */ static int w83781d_read_value(struct w83781d_data *data, u16 reg) { struct i2c_client *client = data->client; int res; mutex_lock(&data->lock); if (client) res = w83781d_read_value_i2c(data, reg); else res = w83781d_read_value_isa(data, reg); mutex_unlock(&data->lock); return res; } static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) { struct i2c_client *client = data->client; mutex_lock(&data->lock); if (client) w83781d_write_value_i2c(data, reg, value); else w83781d_write_value_isa(data, reg, value); mutex_unlock(&data->lock); return 0; } static int w83781d_isa_probe(struct platform_device *pdev) { int err, reg; struct w83781d_data *data; struct resource *res; /* Reserve the ISA region */ res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!devm_request_region(&pdev->dev, res->start + W83781D_ADDR_REG_OFFSET, 2, "w83781d")) return -EBUSY; data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data), GFP_KERNEL); if (!data) return -ENOMEM; mutex_init(&data->lock); data->isa_addr = res->start; platform_set_drvdata(pdev, data); reg = w83781d_read_value(data, W83781D_REG_WCHIPID); switch (reg) { case 0x30: data->type = w83782d; data->name = "w83782d"; break; default: data->type = w83781d; data->name = "w83781d"; } /* Initialize the W83781D chip */ w83781d_init_device(&pdev->dev); /* Register sysfs hooks */ err = w83781d_create_files(&pdev->dev, data->type, 1); if (err) goto exit_remove_files; err = device_create_file(&pdev->dev, &dev_attr_name); if (err) goto exit_remove_files; data->hwmon_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove_files; } return 0; exit_remove_files: w83781d_remove_files(&pdev->dev); device_remove_file(&pdev->dev, &dev_attr_name); return err; } static void w83781d_isa_remove(struct platform_device *pdev) { struct w83781d_data *data = platform_get_drvdata(pdev); hwmon_device_unregister(data->hwmon_dev); w83781d_remove_files(&pdev->dev); device_remove_file(&pdev->dev, &dev_attr_name); } static struct platform_driver w83781d_isa_driver = { .driver = { .name = "w83781d", }, .probe = w83781d_isa_probe, .remove_new = w83781d_isa_remove, }; /* return 1 if a supported chip is found, 0 otherwise */ static int __init w83781d_isa_found(unsigned short address) { int val, save, found = 0; int port; /* * Some boards declare base+0 to base+7 as a PNP device, some base+4 * to base+7 and some base+5 to base+6. So we better request each port * individually for the probing phase. */ for (port = address; port < address + W83781D_EXTENT; port++) { if (!request_region(port, 1, "w83781d")) { pr_debug("Failed to request port 0x%x\n", port); goto release; } } #define REALLY_SLOW_IO /* * We need the timeouts for at least some W83781D-like * chips. But only if we read 'undefined' registers. */ val = inb_p(address + 1); if (inb_p(address + 2) != val || inb_p(address + 3) != val || inb_p(address + 7) != val) { pr_debug("Detection failed at step %d\n", 1); goto release; } #undef REALLY_SLOW_IO /* * We should be able to change the 7 LSB of the address port. The * MSB (busy flag) should be clear initially, set after the write. */ save = inb_p(address + W83781D_ADDR_REG_OFFSET); if (save & 0x80) { pr_debug("Detection failed at step %d\n", 2); goto release; } val = ~save & 0x7f; outb_p(val, address + W83781D_ADDR_REG_OFFSET); if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) { outb_p(save, address + W83781D_ADDR_REG_OFFSET); pr_debug("Detection failed at step %d\n", 3); goto release; } /* We found a device, now see if it could be a W83781D */ outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET); val = inb_p(address + W83781D_DATA_REG_OFFSET); if (val & 0x80) { pr_debug("Detection failed at step %d\n", 4); goto release; } outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); save = inb_p(address + W83781D_DATA_REG_OFFSET); outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET); val = inb_p(address + W83781D_DATA_REG_OFFSET); if ((!(save & 0x80) && (val != 0xa3)) || ((save & 0x80) && (val != 0x5c))) { pr_debug("Detection failed at step %d\n", 5); goto release; } outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET); val = inb_p(address + W83781D_DATA_REG_OFFSET); if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */ pr_debug("Detection failed at step %d\n", 6); goto release; } /* The busy flag should be clear again */ if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) { pr_debug("Detection failed at step %d\n", 7); goto release; } /* Determine the chip type */ outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); save = inb_p(address + W83781D_DATA_REG_OFFSET); outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET); outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET); val = inb_p(address + W83781D_DATA_REG_OFFSET); if ((val & 0xfe) == 0x10 /* W83781D */ || val == 0x30) /* W83782D */ found = 1; if (found) pr_info("Found a %s chip at %#x\n", val == 0x30 ? "W83782D" : "W83781D", (int)address); release: for (port--; port >= address; port--) release_region(port, 1); return found; } static int __init w83781d_isa_device_add(unsigned short address) { struct resource res = { .start = address, .end = address + W83781D_EXTENT - 1, .name = "w83781d", .flags = IORESOURCE_IO, }; int err; pdev = platform_device_alloc("w83781d", address); if (!pdev) { err = -ENOMEM; pr_err("Device allocation failed\n"); goto exit; } err = platform_device_add_resources(pdev, &res, 1); if (err) { pr_err("Device resource addition failed (%d)\n", err); goto exit_device_put; } err = platform_device_add(pdev); if (err) { pr_err("Device addition failed (%d)\n", err); goto exit_device_put; } return 0; exit_device_put: platform_device_put(pdev); exit: pdev = NULL; return err; } static int __init w83781d_isa_register(void) { int res; if (w83781d_isa_found(isa_address)) { res = platform_driver_register(&w83781d_isa_driver); if (res) goto exit; /* Sets global pdev as a side effect */ res = w83781d_isa_device_add(isa_address); if (res) goto exit_unreg_isa_driver; } return 0; exit_unreg_isa_driver: platform_driver_unregister(&w83781d_isa_driver); exit: return res; } static void w83781d_isa_unregister(void) { if (pdev) { platform_device_unregister(pdev); platform_driver_unregister(&w83781d_isa_driver); } } #else /* !CONFIG_ISA */ static struct w83781d_data *w83781d_data_if_isa(void) { … } static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) { … } static int w83781d_read_value(struct w83781d_data *data, u16 reg) { … } static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) { … } static int __init w83781d_isa_register(void) { … } static void w83781d_isa_unregister(void) { … } #endif /* CONFIG_ISA */ static int __init sensors_w83781d_init(void) { … } static void __exit sensors_w83781d_exit(void) { … } MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; module_init(…) …; module_exit(sensors_w83781d_exit);
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