| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Hardware monitoring driver for PMBus devices |
| * |
| * Copyright (c) 2010, 2011 Ericsson AB. |
| * Copyright (c) 2012 Guenter Roeck |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/kernel.h> |
| #include <linux/math64.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/slab.h> |
| #include <linux/i2c.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/pmbus.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/of.h> |
| #include <linux/thermal.h> |
| #include "pmbus.h" |
| |
| /* |
| * Number of additional attribute pointers to allocate |
| * with each call to krealloc |
| */ |
| #define PMBUS_ATTR_ALLOC_SIZE 32 |
| #define PMBUS_NAME_SIZE 24 |
| |
| struct pmbus_sensor { |
| struct pmbus_sensor *next; |
| char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */ |
| struct device_attribute attribute; |
| u8 page; /* page number */ |
| u8 phase; /* phase number, 0xff for all phases */ |
| u16 reg; /* register */ |
| enum pmbus_sensor_classes class; /* sensor class */ |
| bool update; /* runtime sensor update needed */ |
| bool convert; /* Whether or not to apply linear/vid/direct */ |
| int data; /* Sensor data. |
| Negative if there was a read error */ |
| }; |
| #define to_pmbus_sensor(_attr) \ |
| container_of(_attr, struct pmbus_sensor, attribute) |
| |
| struct pmbus_boolean { |
| char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */ |
| struct sensor_device_attribute attribute; |
| struct pmbus_sensor *s1; |
| struct pmbus_sensor *s2; |
| }; |
| #define to_pmbus_boolean(_attr) \ |
| container_of(_attr, struct pmbus_boolean, attribute) |
| |
| struct pmbus_label { |
| char name[PMBUS_NAME_SIZE]; /* sysfs label name */ |
| struct device_attribute attribute; |
| char label[PMBUS_NAME_SIZE]; /* label */ |
| }; |
| #define to_pmbus_label(_attr) \ |
| container_of(_attr, struct pmbus_label, attribute) |
| |
| /* Macros for converting between sensor index and register/page/status mask */ |
| |
| #define PB_STATUS_MASK 0xffff |
| #define PB_REG_SHIFT 16 |
| #define PB_REG_MASK 0x3ff |
| #define PB_PAGE_SHIFT 26 |
| #define PB_PAGE_MASK 0x3f |
| |
| #define pb_reg_to_index(page, reg, mask) (((page) << PB_PAGE_SHIFT) | \ |
| ((reg) << PB_REG_SHIFT) | (mask)) |
| |
| #define pb_index_to_page(index) (((index) >> PB_PAGE_SHIFT) & PB_PAGE_MASK) |
| #define pb_index_to_reg(index) (((index) >> PB_REG_SHIFT) & PB_REG_MASK) |
| #define pb_index_to_mask(index) ((index) & PB_STATUS_MASK) |
| |
| struct pmbus_data { |
| struct device *dev; |
| struct device *hwmon_dev; |
| |
| u32 flags; /* from platform data */ |
| |
| int exponent[PMBUS_PAGES]; |
| /* linear mode: exponent for output voltages */ |
| |
| const struct pmbus_driver_info *info; |
| |
| int max_attributes; |
| int num_attributes; |
| struct attribute_group group; |
| const struct attribute_group **groups; |
| struct dentry *debugfs; /* debugfs device directory */ |
| |
| struct pmbus_sensor *sensors; |
| |
| struct mutex update_lock; |
| |
| bool has_status_word; /* device uses STATUS_WORD register */ |
| int (*read_status)(struct i2c_client *client, int page); |
| |
| s16 currpage; /* current page, -1 for unknown/unset */ |
| s16 currphase; /* current phase, 0xff for all, -1 for unknown/unset */ |
| |
| int vout_low[PMBUS_PAGES]; /* voltage low margin */ |
| int vout_high[PMBUS_PAGES]; /* voltage high margin */ |
| }; |
| |
| struct pmbus_debugfs_entry { |
| struct i2c_client *client; |
| u8 page; |
| u8 reg; |
| }; |
| |
| static const int pmbus_fan_rpm_mask[] = { |
| PB_FAN_1_RPM, |
| PB_FAN_2_RPM, |
| PB_FAN_1_RPM, |
| PB_FAN_2_RPM, |
| }; |
| |
| static const int pmbus_fan_config_registers[] = { |
| PMBUS_FAN_CONFIG_12, |
| PMBUS_FAN_CONFIG_12, |
| PMBUS_FAN_CONFIG_34, |
| PMBUS_FAN_CONFIG_34 |
| }; |
| |
| static const int pmbus_fan_command_registers[] = { |
| PMBUS_FAN_COMMAND_1, |
| PMBUS_FAN_COMMAND_2, |
| PMBUS_FAN_COMMAND_3, |
| PMBUS_FAN_COMMAND_4, |
| }; |
| |
| void pmbus_clear_cache(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor *sensor; |
| |
| for (sensor = data->sensors; sensor; sensor = sensor->next) |
| sensor->data = -ENODATA; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_clear_cache, PMBUS); |
| |
| void pmbus_set_update(struct i2c_client *client, u8 reg, bool update) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor *sensor; |
| |
| for (sensor = data->sensors; sensor; sensor = sensor->next) |
| if (sensor->reg == reg) |
| sensor->update = update; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_set_update, PMBUS); |
| |
| int pmbus_set_page(struct i2c_client *client, int page, int phase) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int rv; |
| |
| if (page < 0) |
| return 0; |
| |
| if (!(data->info->func[page] & PMBUS_PAGE_VIRTUAL) && |
| data->info->pages > 1 && page != data->currpage) { |
| rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); |
| if (rv < 0) |
| return rv; |
| |
| rv = i2c_smbus_read_byte_data(client, PMBUS_PAGE); |
| if (rv < 0) |
| return rv; |
| |
| if (rv != page) |
| return -EIO; |
| } |
| data->currpage = page; |
| |
| if (data->info->phases[page] && data->currphase != phase && |
| !(data->info->func[page] & PMBUS_PHASE_VIRTUAL)) { |
| rv = i2c_smbus_write_byte_data(client, PMBUS_PHASE, |
| phase); |
| if (rv) |
| return rv; |
| } |
| data->currphase = phase; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_set_page, PMBUS); |
| |
| int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, 0xff); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_write_byte(client, value); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_write_byte, PMBUS); |
| |
| /* |
| * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if |
| * a device specific mapping function exists and calls it if necessary. |
| */ |
| static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| int status; |
| |
| if (info->write_byte) { |
| status = info->write_byte(client, page, value); |
| if (status != -ENODATA) |
| return status; |
| } |
| return pmbus_write_byte(client, page, value); |
| } |
| |
| int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg, |
| u16 word) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, 0xff); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_write_word_data(client, reg, word); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_write_word_data, PMBUS); |
| |
| |
| static int pmbus_write_virt_reg(struct i2c_client *client, int page, int reg, |
| u16 word) |
| { |
| int bit; |
| int id; |
| int rv; |
| |
| switch (reg) { |
| case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4: |
| id = reg - PMBUS_VIRT_FAN_TARGET_1; |
| bit = pmbus_fan_rpm_mask[id]; |
| rv = pmbus_update_fan(client, page, id, bit, bit, word); |
| break; |
| default: |
| rv = -ENXIO; |
| break; |
| } |
| |
| return rv; |
| } |
| |
| /* |
| * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if |
| * a device specific mapping function exists and calls it if necessary. |
| */ |
| static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, |
| u16 word) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| int status; |
| |
| if (info->write_word_data) { |
| status = info->write_word_data(client, page, reg, word); |
| if (status != -ENODATA) |
| return status; |
| } |
| |
| if (reg >= PMBUS_VIRT_BASE) |
| return pmbus_write_virt_reg(client, page, reg, word); |
| |
| return pmbus_write_word_data(client, page, reg, word); |
| } |
| |
| /* |
| * _pmbus_write_byte_data() is similar to pmbus_write_byte_data(), but checks if |
| * a device specific mapping function exists and calls it if necessary. |
| */ |
| static int _pmbus_write_byte_data(struct i2c_client *client, int page, int reg, u8 value) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| int status; |
| |
| if (info->write_byte_data) { |
| status = info->write_byte_data(client, page, reg, value); |
| if (status != -ENODATA) |
| return status; |
| } |
| return pmbus_write_byte_data(client, page, reg, value); |
| } |
| |
| /* |
| * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if |
| * a device specific mapping function exists and calls it if necessary. |
| */ |
| static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| int status; |
| |
| if (info->read_byte_data) { |
| status = info->read_byte_data(client, page, reg); |
| if (status != -ENODATA) |
| return status; |
| } |
| return pmbus_read_byte_data(client, page, reg); |
| } |
| |
| int pmbus_update_fan(struct i2c_client *client, int page, int id, |
| u8 config, u8 mask, u16 command) |
| { |
| int from; |
| int rv; |
| u8 to; |
| |
| from = _pmbus_read_byte_data(client, page, |
| pmbus_fan_config_registers[id]); |
| if (from < 0) |
| return from; |
| |
| to = (from & ~mask) | (config & mask); |
| if (to != from) { |
| rv = _pmbus_write_byte_data(client, page, |
| pmbus_fan_config_registers[id], to); |
| if (rv < 0) |
| return rv; |
| } |
| |
| return _pmbus_write_word_data(client, page, |
| pmbus_fan_command_registers[id], command); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_update_fan, PMBUS); |
| |
| int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, phase); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_read_word_data(client, reg); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_read_word_data, PMBUS); |
| |
| static int pmbus_read_virt_reg(struct i2c_client *client, int page, int reg) |
| { |
| int rv; |
| int id; |
| |
| switch (reg) { |
| case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4: |
| id = reg - PMBUS_VIRT_FAN_TARGET_1; |
| rv = pmbus_get_fan_rate_device(client, page, id, rpm); |
| break; |
| default: |
| rv = -ENXIO; |
| break; |
| } |
| |
| return rv; |
| } |
| |
| /* |
| * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if |
| * a device specific mapping function exists and calls it if necessary. |
| */ |
| static int _pmbus_read_word_data(struct i2c_client *client, int page, |
| int phase, int reg) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| int status; |
| |
| if (info->read_word_data) { |
| status = info->read_word_data(client, page, phase, reg); |
| if (status != -ENODATA) |
| return status; |
| } |
| |
| if (reg >= PMBUS_VIRT_BASE) |
| return pmbus_read_virt_reg(client, page, reg); |
| |
| return pmbus_read_word_data(client, page, phase, reg); |
| } |
| |
| /* Same as above, but without phase parameter, for use in check functions */ |
| static int __pmbus_read_word_data(struct i2c_client *client, int page, int reg) |
| { |
| return _pmbus_read_word_data(client, page, 0xff, reg); |
| } |
| |
| int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, 0xff); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_read_byte_data, PMBUS); |
| |
| int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, 0xff); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_write_byte_data(client, reg, value); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_write_byte_data, PMBUS); |
| |
| int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, |
| u8 mask, u8 value) |
| { |
| unsigned int tmp; |
| int rv; |
| |
| rv = _pmbus_read_byte_data(client, page, reg); |
| if (rv < 0) |
| return rv; |
| |
| tmp = (rv & ~mask) | (value & mask); |
| |
| if (tmp != rv) |
| rv = _pmbus_write_byte_data(client, page, reg, tmp); |
| |
| return rv; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_update_byte_data, PMBUS); |
| |
| static int pmbus_read_block_data(struct i2c_client *client, int page, u8 reg, |
| char *data_buf) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page, 0xff); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_read_block_data(client, reg, data_buf); |
| } |
| |
| static struct pmbus_sensor *pmbus_find_sensor(struct pmbus_data *data, int page, |
| int reg) |
| { |
| struct pmbus_sensor *sensor; |
| |
| for (sensor = data->sensors; sensor; sensor = sensor->next) { |
| if (sensor->page == page && sensor->reg == reg) |
| return sensor; |
| } |
| |
| return ERR_PTR(-EINVAL); |
| } |
| |
| static int pmbus_get_fan_rate(struct i2c_client *client, int page, int id, |
| enum pmbus_fan_mode mode, |
| bool from_cache) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| bool want_rpm, have_rpm; |
| struct pmbus_sensor *s; |
| int config; |
| int reg; |
| |
| want_rpm = (mode == rpm); |
| |
| if (from_cache) { |
| reg = want_rpm ? PMBUS_VIRT_FAN_TARGET_1 : PMBUS_VIRT_PWM_1; |
| s = pmbus_find_sensor(data, page, reg + id); |
| if (IS_ERR(s)) |
| return PTR_ERR(s); |
| |
| return s->data; |
| } |
| |
| config = _pmbus_read_byte_data(client, page, |
| pmbus_fan_config_registers[id]); |
| if (config < 0) |
| return config; |
| |
| have_rpm = !!(config & pmbus_fan_rpm_mask[id]); |
| if (want_rpm == have_rpm) |
| return pmbus_read_word_data(client, page, 0xff, |
| pmbus_fan_command_registers[id]); |
| |
| /* Can't sensibly map between RPM and PWM, just return zero */ |
| return 0; |
| } |
| |
| int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id, |
| enum pmbus_fan_mode mode) |
| { |
| return pmbus_get_fan_rate(client, page, id, mode, false); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_device, PMBUS); |
| |
| int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id, |
| enum pmbus_fan_mode mode) |
| { |
| return pmbus_get_fan_rate(client, page, id, mode, true); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_cached, PMBUS); |
| |
| static void pmbus_clear_fault_page(struct i2c_client *client, int page) |
| { |
| _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); |
| } |
| |
| void pmbus_clear_faults(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int i; |
| |
| for (i = 0; i < data->info->pages; i++) |
| pmbus_clear_fault_page(client, i); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_clear_faults, PMBUS); |
| |
| static int pmbus_check_status_cml(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int status, status2; |
| |
| status = data->read_status(client, -1); |
| if (status < 0 || (status & PB_STATUS_CML)) { |
| status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
| if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| static bool pmbus_check_register(struct i2c_client *client, |
| int (*func)(struct i2c_client *client, |
| int page, int reg), |
| int page, int reg) |
| { |
| int rv; |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| rv = func(client, page, reg); |
| if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
| rv = pmbus_check_status_cml(client); |
| if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK)) |
| data->read_status(client, -1); |
| pmbus_clear_fault_page(client, -1); |
| return rv >= 0; |
| } |
| |
| static bool pmbus_check_status_register(struct i2c_client *client, int page) |
| { |
| int status; |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| status = data->read_status(client, page); |
| if (status >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK) && |
| (status & PB_STATUS_CML)) { |
| status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
| if (status < 0 || (status & PB_CML_FAULT_INVALID_COMMAND)) |
| status = -EIO; |
| } |
| |
| pmbus_clear_fault_page(client, -1); |
| return status >= 0; |
| } |
| |
| bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) |
| { |
| return pmbus_check_register(client, _pmbus_read_byte_data, page, reg); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_check_byte_register, PMBUS); |
| |
| bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) |
| { |
| return pmbus_check_register(client, __pmbus_read_word_data, page, reg); |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_check_word_register, PMBUS); |
| |
| static bool __maybe_unused pmbus_check_block_register(struct i2c_client *client, |
| int page, int reg) |
| { |
| int rv; |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| char data_buf[I2C_SMBUS_BLOCK_MAX + 2]; |
| |
| rv = pmbus_read_block_data(client, page, reg, data_buf); |
| if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
| rv = pmbus_check_status_cml(client); |
| if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK)) |
| data->read_status(client, -1); |
| pmbus_clear_fault_page(client, -1); |
| return rv >= 0; |
| } |
| |
| const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| return data->info; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_get_driver_info, PMBUS); |
| |
| static int pmbus_get_status(struct i2c_client *client, int page, int reg) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int status; |
| |
| switch (reg) { |
| case PMBUS_STATUS_WORD: |
| status = data->read_status(client, page); |
| break; |
| default: |
| status = _pmbus_read_byte_data(client, page, reg); |
| break; |
| } |
| if (status < 0) |
| pmbus_clear_faults(client); |
| return status; |
| } |
| |
| static void pmbus_update_sensor_data(struct i2c_client *client, struct pmbus_sensor *sensor) |
| { |
| if (sensor->data < 0 || sensor->update) |
| sensor->data = _pmbus_read_word_data(client, sensor->page, |
| sensor->phase, sensor->reg); |
| } |
| |
| /* |
| * Convert ieee754 sensor values to milli- or micro-units |
| * depending on sensor type. |
| * |
| * ieee754 data format: |
| * bit 15: sign |
| * bit 10..14: exponent |
| * bit 0..9: mantissa |
| * exponent=0: |
| * v=(−1)^signbit * 2^(−14) * 0.significantbits |
| * exponent=1..30: |
| * v=(−1)^signbit * 2^(exponent - 15) * 1.significantbits |
| * exponent=31: |
| * v=NaN |
| * |
| * Add the number mantissa bits into the calculations for simplicity. |
| * To do that, add '10' to the exponent. By doing that, we can just add |
| * 0x400 to normal values and get the expected result. |
| */ |
| static long pmbus_reg2data_ieee754(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| int exponent; |
| bool sign; |
| long val; |
| |
| /* only support half precision for now */ |
| sign = sensor->data & 0x8000; |
| exponent = (sensor->data >> 10) & 0x1f; |
| val = sensor->data & 0x3ff; |
| |
| if (exponent == 0) { /* subnormal */ |
| exponent = -(14 + 10); |
| } else if (exponent == 0x1f) { /* NaN, convert to min/max */ |
| exponent = 0; |
| val = 65504; |
| } else { |
| exponent -= (15 + 10); /* normal */ |
| val |= 0x400; |
| } |
| |
| /* scale result to milli-units for all sensors except fans */ |
| if (sensor->class != PSC_FAN) |
| val = val * 1000L; |
| |
| /* scale result to micro-units for power sensors */ |
| if (sensor->class == PSC_POWER) |
| val = val * 1000L; |
| |
| if (exponent >= 0) |
| val <<= exponent; |
| else |
| val >>= -exponent; |
| |
| if (sign) |
| val = -val; |
| |
| return val; |
| } |
| |
| /* |
| * Convert linear sensor values to milli- or micro-units |
| * depending on sensor type. |
| */ |
| static s64 pmbus_reg2data_linear(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| s16 exponent; |
| s32 mantissa; |
| s64 val; |
| |
| if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
| exponent = data->exponent[sensor->page]; |
| mantissa = (u16) sensor->data; |
| } else { /* LINEAR11 */ |
| exponent = ((s16)sensor->data) >> 11; |
| mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5; |
| } |
| |
| val = mantissa; |
| |
| /* scale result to milli-units for all sensors except fans */ |
| if (sensor->class != PSC_FAN) |
| val = val * 1000LL; |
| |
| /* scale result to micro-units for power sensors */ |
| if (sensor->class == PSC_POWER) |
| val = val * 1000LL; |
| |
| if (exponent >= 0) |
| val <<= exponent; |
| else |
| val >>= -exponent; |
| |
| return val; |
| } |
| |
| /* |
| * Convert direct sensor values to milli- or micro-units |
| * depending on sensor type. |
| */ |
| static s64 pmbus_reg2data_direct(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| s64 b, val = (s16)sensor->data; |
| s32 m, R; |
| |
| m = data->info->m[sensor->class]; |
| b = data->info->b[sensor->class]; |
| R = data->info->R[sensor->class]; |
| |
| if (m == 0) |
| return 0; |
| |
| /* X = 1/m * (Y * 10^-R - b) */ |
| R = -R; |
| /* scale result to milli-units for everything but fans */ |
| if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) { |
| R += 3; |
| b *= 1000; |
| } |
| |
| /* scale result to micro-units for power sensors */ |
| if (sensor->class == PSC_POWER) { |
| R += 3; |
| b *= 1000; |
| } |
| |
| while (R > 0) { |
| val *= 10; |
| R--; |
| } |
| while (R < 0) { |
| val = div_s64(val + 5LL, 10L); /* round closest */ |
| R++; |
| } |
| |
| val = div_s64(val - b, m); |
| return val; |
| } |
| |
| /* |
| * Convert VID sensor values to milli- or micro-units |
| * depending on sensor type. |
| */ |
| static s64 pmbus_reg2data_vid(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| long val = sensor->data; |
| long rv = 0; |
| |
| switch (data->info->vrm_version[sensor->page]) { |
| case vr11: |
| if (val >= 0x02 && val <= 0xb2) |
| rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); |
| break; |
| case vr12: |
| if (val >= 0x01) |
| rv = 250 + (val - 1) * 5; |
| break; |
| case vr13: |
| if (val >= 0x01) |
| rv = 500 + (val - 1) * 10; |
| break; |
| case imvp9: |
| if (val >= 0x01) |
| rv = 200 + (val - 1) * 10; |
| break; |
| case amd625mv: |
| if (val >= 0x0 && val <= 0xd8) |
| rv = DIV_ROUND_CLOSEST(155000 - val * 625, 100); |
| break; |
| } |
| return rv; |
| } |
| |
| static s64 pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
| { |
| s64 val; |
| |
| if (!sensor->convert) |
| return sensor->data; |
| |
| switch (data->info->format[sensor->class]) { |
| case direct: |
| val = pmbus_reg2data_direct(data, sensor); |
| break; |
| case vid: |
| val = pmbus_reg2data_vid(data, sensor); |
| break; |
| case ieee754: |
| val = pmbus_reg2data_ieee754(data, sensor); |
| break; |
| case linear: |
| default: |
| val = pmbus_reg2data_linear(data, sensor); |
| break; |
| } |
| return val; |
| } |
| |
| #define MAX_IEEE_MANTISSA (0x7ff * 1000) |
| #define MIN_IEEE_MANTISSA (0x400 * 1000) |
| |
| static u16 pmbus_data2reg_ieee754(struct pmbus_data *data, |
| struct pmbus_sensor *sensor, long val) |
| { |
| u16 exponent = (15 + 10); |
| long mantissa; |
| u16 sign = 0; |
| |
| /* simple case */ |
| if (val == 0) |
| return 0; |
| |
| if (val < 0) { |
| sign = 0x8000; |
| val = -val; |
| } |
| |
| /* Power is in uW. Convert to mW before converting. */ |
| if (sensor->class == PSC_POWER) |
| val = DIV_ROUND_CLOSEST(val, 1000L); |
| |
| /* |
| * For simplicity, convert fan data to milli-units |
| * before calculating the exponent. |
| */ |
| if (sensor->class == PSC_FAN) |
| val = val * 1000; |
| |
| /* Reduce large mantissa until it fits into 10 bit */ |
| while (val > MAX_IEEE_MANTISSA && exponent < 30) { |
| exponent++; |
| val >>= 1; |
| } |
| /* |
| * Increase small mantissa to generate valid 'normal' |
| * number |
| */ |
| while (val < MIN_IEEE_MANTISSA && exponent > 1) { |
| exponent--; |
| val <<= 1; |
| } |
| |
| /* Convert mantissa from milli-units to units */ |
| mantissa = DIV_ROUND_CLOSEST(val, 1000); |
| |
| /* |
| * Ensure that the resulting number is within range. |
| * Valid range is 0x400..0x7ff, where bit 10 reflects |
| * the implied high bit in normalized ieee754 numbers. |
| * Set the range to 0x400..0x7ff to reflect this. |
| * The upper bit is then removed by the mask against |
| * 0x3ff in the final assignment. |
| */ |
| if (mantissa > 0x7ff) |
| mantissa = 0x7ff; |
| else if (mantissa < 0x400) |
| mantissa = 0x400; |
| |
| /* Convert to sign, 5 bit exponent, 10 bit mantissa */ |
| return sign | (mantissa & 0x3ff) | ((exponent << 10) & 0x7c00); |
| } |
| |
| #define MAX_LIN_MANTISSA (1023 * 1000) |
| #define MIN_LIN_MANTISSA (511 * 1000) |
| |
| static u16 pmbus_data2reg_linear(struct pmbus_data *data, |
| struct pmbus_sensor *sensor, s64 val) |
| { |
| s16 exponent = 0, mantissa; |
| bool negative = false; |
| |
| /* simple case */ |
| if (val == 0) |
| return 0; |
| |
| if (sensor->class == PSC_VOLTAGE_OUT) { |
| /* LINEAR16 does not support negative voltages */ |
| if (val < 0) |
| return 0; |
| |
| /* |
| * For a static exponents, we don't have a choice |
| * but to adjust the value to it. |
| */ |
| if (data->exponent[sensor->page] < 0) |
| val <<= -data->exponent[sensor->page]; |
| else |
| val >>= data->exponent[sensor->page]; |
| val = DIV_ROUND_CLOSEST_ULL(val, 1000); |
| return clamp_val(val, 0, 0xffff); |
| } |
| |
| if (val < 0) { |
| negative = true; |
| val = -val; |
| } |
| |
| /* Power is in uW. Convert to mW before converting. */ |
| if (sensor->class == PSC_POWER) |
| val = DIV_ROUND_CLOSEST_ULL(val, 1000); |
| |
| /* |
| * For simplicity, convert fan data to milli-units |
| * before calculating the exponent. |
| */ |
| if (sensor->class == PSC_FAN) |
| val = val * 1000LL; |
| |
| /* Reduce large mantissa until it fits into 10 bit */ |
| while (val >= MAX_LIN_MANTISSA && exponent < 15) { |
| exponent++; |
| val >>= 1; |
| } |
| /* Increase small mantissa to improve precision */ |
| while (val < MIN_LIN_MANTISSA && exponent > -15) { |
| exponent--; |
| val <<= 1; |
| } |
| |
| /* Convert mantissa from milli-units to units */ |
| mantissa = clamp_val(DIV_ROUND_CLOSEST_ULL(val, 1000), 0, 0x3ff); |
| |
| /* restore sign */ |
| if (negative) |
| mantissa = -mantissa; |
| |
| /* Convert to 5 bit exponent, 11 bit mantissa */ |
| return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); |
| } |
| |
| static u16 pmbus_data2reg_direct(struct pmbus_data *data, |
| struct pmbus_sensor *sensor, s64 val) |
| { |
| s64 b; |
| s32 m, R; |
| |
| m = data->info->m[sensor->class]; |
| b = data->info->b[sensor->class]; |
| R = data->info->R[sensor->class]; |
| |
| /* Power is in uW. Adjust R and b. */ |
| if (sensor->class == PSC_POWER) { |
| R -= 3; |
| b *= 1000; |
| } |
| |
| /* Calculate Y = (m * X + b) * 10^R */ |
| if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) { |
| R -= 3; /* Adjust R and b for data in milli-units */ |
| b *= 1000; |
| } |
| val = val * m + b; |
| |
| while (R > 0) { |
| val *= 10; |
| R--; |
| } |
| while (R < 0) { |
| val = div_s64(val + 5LL, 10L); /* round closest */ |
| R++; |
| } |
| |
| return (u16)clamp_val(val, S16_MIN, S16_MAX); |
| } |
| |
| static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
| struct pmbus_sensor *sensor, s64 val) |
| { |
| val = clamp_val(val, 500, 1600); |
| |
| return 2 + DIV_ROUND_CLOSEST_ULL((1600LL - val) * 100LL, 625); |
| } |
| |
| static u16 pmbus_data2reg(struct pmbus_data *data, |
| struct pmbus_sensor *sensor, s64 val) |
| { |
| u16 regval; |
| |
| if (!sensor->convert) |
| return val; |
| |
| switch (data->info->format[sensor->class]) { |
| case direct: |
| regval = pmbus_data2reg_direct(data, sensor, val); |
| break; |
| case vid: |
| regval = pmbus_data2reg_vid(data, sensor, val); |
| break; |
| case ieee754: |
| regval = pmbus_data2reg_ieee754(data, sensor, val); |
| break; |
| case linear: |
| default: |
| regval = pmbus_data2reg_linear(data, sensor, val); |
| break; |
| } |
| return regval; |
| } |
| |
| /* |
| * Return boolean calculated from converted data. |
| * <index> defines a status register index and mask. |
| * The mask is in the lower 8 bits, the register index is in bits 8..23. |
| * |
| * The associated pmbus_boolean structure contains optional pointers to two |
| * sensor attributes. If specified, those attributes are compared against each |
| * other to determine if a limit has been exceeded. |
| * |
| * If the sensor attribute pointers are NULL, the function returns true if |
| * (status[reg] & mask) is true. |
| * |
| * If sensor attribute pointers are provided, a comparison against a specified |
| * limit has to be performed to determine the boolean result. |
| * In this case, the function returns true if v1 >= v2 (where v1 and v2 are |
| * sensor values referenced by sensor attribute pointers s1 and s2). |
| * |
| * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. |
| * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. |
| * |
| * If a negative value is stored in any of the referenced registers, this value |
| * reflects an error code which will be returned. |
| */ |
| static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, |
| int index) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor *s1 = b->s1; |
| struct pmbus_sensor *s2 = b->s2; |
| u16 mask = pb_index_to_mask(index); |
| u8 page = pb_index_to_page(index); |
| u16 reg = pb_index_to_reg(index); |
| int ret, status; |
| u16 regval; |
| |
| mutex_lock(&data->update_lock); |
| status = pmbus_get_status(client, page, reg); |
| if (status < 0) { |
| ret = status; |
| goto unlock; |
| } |
| |
| if (s1) |
| pmbus_update_sensor_data(client, s1); |
| if (s2) |
| pmbus_update_sensor_data(client, s2); |
| |
| regval = status & mask; |
| if (regval) { |
| ret = _pmbus_write_byte_data(client, page, reg, regval); |
| if (ret) |
| goto unlock; |
| } |
| if (s1 && s2) { |
| s64 v1, v2; |
| |
| if (s1->data < 0) { |
| ret = s1->data; |
| goto unlock; |
| } |
| if (s2->data < 0) { |
| ret = s2->data; |
| goto unlock; |
| } |
| |
| v1 = pmbus_reg2data(data, s1); |
| v2 = pmbus_reg2data(data, s2); |
| ret = !!(regval && v1 >= v2); |
| } else { |
| ret = !!regval; |
| } |
| unlock: |
| mutex_unlock(&data->update_lock); |
| return ret; |
| } |
| |
| static ssize_t pmbus_show_boolean(struct device *dev, |
| struct device_attribute *da, char *buf) |
| { |
| struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| struct pmbus_boolean *boolean = to_pmbus_boolean(attr); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| int val; |
| |
| val = pmbus_get_boolean(client, boolean, attr->index); |
| if (val < 0) |
| return val; |
| return sysfs_emit(buf, "%d\n", val); |
| } |
| |
| static ssize_t pmbus_show_sensor(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| ssize_t ret; |
| |
| mutex_lock(&data->update_lock); |
| pmbus_update_sensor_data(client, sensor); |
| if (sensor->data < 0) |
| ret = sensor->data; |
| else |
| ret = sysfs_emit(buf, "%lld\n", pmbus_reg2data(data, sensor)); |
| mutex_unlock(&data->update_lock); |
| return ret; |
| } |
| |
| static ssize_t pmbus_set_sensor(struct device *dev, |
| struct device_attribute *devattr, |
| const char *buf, size_t count) |
| { |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
| ssize_t rv = count; |
| s64 val; |
| int ret; |
| u16 regval; |
| |
| if (kstrtos64(buf, 10, &val) < 0) |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| regval = pmbus_data2reg(data, sensor, val); |
| ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
| if (ret < 0) |
| rv = ret; |
| else |
| sensor->data = -ENODATA; |
| mutex_unlock(&data->update_lock); |
| return rv; |
| } |
| |
| static ssize_t pmbus_show_label(struct device *dev, |
| struct device_attribute *da, char *buf) |
| { |
| struct pmbus_label *label = to_pmbus_label(da); |
| |
| return sysfs_emit(buf, "%s\n", label->label); |
| } |
| |
| static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr) |
| { |
| if (data->num_attributes >= data->max_attributes - 1) { |
| int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE; |
| void *new_attrs = devm_krealloc(data->dev, data->group.attrs, |
| new_max_attrs * sizeof(void *), |
| GFP_KERNEL); |
| if (!new_attrs) |
| return -ENOMEM; |
| data->group.attrs = new_attrs; |
| data->max_attributes = new_max_attrs; |
| } |
| |
| data->group.attrs[data->num_attributes++] = attr; |
| data->group.attrs[data->num_attributes] = NULL; |
| return 0; |
| } |
| |
| static void pmbus_dev_attr_init(struct device_attribute *dev_attr, |
| const char *name, |
| umode_t mode, |
| ssize_t (*show)(struct device *dev, |
| struct device_attribute *attr, |
| char *buf), |
| ssize_t (*store)(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count)) |
| { |
| sysfs_attr_init(&dev_attr->attr); |
| dev_attr->attr.name = name; |
| dev_attr->attr.mode = mode; |
| dev_attr->show = show; |
| dev_attr->store = store; |
| } |
| |
| static void pmbus_attr_init(struct sensor_device_attribute *a, |
| const char *name, |
| umode_t mode, |
| ssize_t (*show)(struct device *dev, |
| struct device_attribute *attr, |
| char *buf), |
| ssize_t (*store)(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count), |
| int idx) |
| { |
| pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store); |
| a->index = idx; |
| } |
| |
| static int pmbus_add_boolean(struct pmbus_data *data, |
| const char *name, const char *type, int seq, |
| struct pmbus_sensor *s1, |
| struct pmbus_sensor *s2, |
| u8 page, u16 reg, u16 mask) |
| { |
| struct pmbus_boolean *boolean; |
| struct sensor_device_attribute *a; |
| |
| if (WARN((s1 && !s2) || (!s1 && s2), "Bad s1/s2 parameters\n")) |
| return -EINVAL; |
| |
| boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL); |
| if (!boolean) |
| return -ENOMEM; |
| |
| a = &boolean->attribute; |
| |
| snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", |
| name, seq, type); |
| boolean->s1 = s1; |
| boolean->s2 = s2; |
| pmbus_attr_init(a, boolean->name, 0444, pmbus_show_boolean, NULL, |
| pb_reg_to_index(page, reg, mask)); |
| |
| return pmbus_add_attribute(data, &a->dev_attr.attr); |
| } |
| |
| /* of thermal for pmbus temperature sensors */ |
| struct pmbus_thermal_data { |
| struct pmbus_data *pmbus_data; |
| struct pmbus_sensor *sensor; |
| }; |
| |
| static int pmbus_thermal_get_temp(void *data, int *temp) |
| { |
| struct pmbus_thermal_data *tdata = data; |
| struct pmbus_sensor *sensor = tdata->sensor; |
| struct pmbus_data *pmbus_data = tdata->pmbus_data; |
| struct i2c_client *client = to_i2c_client(pmbus_data->dev); |
| struct device *dev = pmbus_data->hwmon_dev; |
| int ret = 0; |
| |
| if (!dev) { |
| /* May not even get to hwmon yet */ |
| *temp = 0; |
| return 0; |
| } |
| |
| mutex_lock(&pmbus_data->update_lock); |
| pmbus_update_sensor_data(client, sensor); |
| if (sensor->data < 0) |
| ret = sensor->data; |
| else |
| *temp = (int)pmbus_reg2data(pmbus_data, sensor); |
| mutex_unlock(&pmbus_data->update_lock); |
| |
| return ret; |
| } |
| |
| static const struct thermal_zone_of_device_ops pmbus_thermal_ops = { |
| .get_temp = pmbus_thermal_get_temp, |
| }; |
| |
| static int pmbus_thermal_add_sensor(struct pmbus_data *pmbus_data, |
| struct pmbus_sensor *sensor, int index) |
| { |
| struct device *dev = pmbus_data->dev; |
| struct pmbus_thermal_data *tdata; |
| struct thermal_zone_device *tzd; |
| |
| tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); |
| if (!tdata) |
| return -ENOMEM; |
| |
| tdata->sensor = sensor; |
| tdata->pmbus_data = pmbus_data; |
| |
| tzd = devm_thermal_zone_of_sensor_register(dev, index, tdata, |
| &pmbus_thermal_ops); |
| /* |
| * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV, |
| * so ignore that error but forward any other error. |
| */ |
| if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV)) |
| return PTR_ERR(tzd); |
| |
| return 0; |
| } |
| |
| static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, |
| const char *name, const char *type, |
| int seq, int page, int phase, |
| int reg, |
| enum pmbus_sensor_classes class, |
| bool update, bool readonly, |
| bool convert) |
| { |
| struct pmbus_sensor *sensor; |
| struct device_attribute *a; |
| |
| sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL); |
| if (!sensor) |
| return NULL; |
| a = &sensor->attribute; |
| |
| if (type) |
| snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", |
| name, seq, type); |
| else |
| snprintf(sensor->name, sizeof(sensor->name), "%s%d", |
| name, seq); |
| |
| if (data->flags & PMBUS_WRITE_PROTECTED) |
| readonly = true; |
| |
| sensor->page = page; |
| sensor->phase = phase; |
| sensor->reg = reg; |
| sensor->class = class; |
| sensor->update = update; |
| sensor->convert = convert; |
| sensor->data = -ENODATA; |
| pmbus_dev_attr_init(a, sensor->name, |
| readonly ? 0444 : 0644, |
| pmbus_show_sensor, pmbus_set_sensor); |
| |
| if (pmbus_add_attribute(data, &a->attr)) |
| return NULL; |
| |
| sensor->next = data->sensors; |
| data->sensors = sensor; |
| |
| /* temperature sensors with _input values are registered with thermal */ |
| if (class == PSC_TEMPERATURE && strcmp(type, "input") == 0) |
| pmbus_thermal_add_sensor(data, sensor, seq); |
| |
| return sensor; |
| } |
| |
| static int pmbus_add_label(struct pmbus_data *data, |
| const char *name, int seq, |
| const char *lstring, int index, int phase) |
| { |
| struct pmbus_label *label; |
| struct device_attribute *a; |
| |
| label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL); |
| if (!label) |
| return -ENOMEM; |
| |
| a = &label->attribute; |
| |
| snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); |
| if (!index) { |
| if (phase == 0xff) |
| strncpy(label->label, lstring, |
| sizeof(label->label) - 1); |
| else |
| snprintf(label->label, sizeof(label->label), "%s.%d", |
| lstring, phase); |
| } else { |
| if (phase == 0xff) |
| snprintf(label->label, sizeof(label->label), "%s%d", |
| lstring, index); |
| else |
| snprintf(label->label, sizeof(label->label), "%s%d.%d", |
| lstring, index, phase); |
| } |
| |
| pmbus_dev_attr_init(a, label->name, 0444, pmbus_show_label, NULL); |
| return pmbus_add_attribute(data, &a->attr); |
| } |
| |
| /* |
| * Search for attributes. Allocate sensors, booleans, and labels as needed. |
| */ |
| |
| /* |
| * The pmbus_limit_attr structure describes a single limit attribute |
| * and its associated alarm attribute. |
| */ |
| struct pmbus_limit_attr { |
| u16 reg; /* Limit register */ |
| u16 sbit; /* Alarm attribute status bit */ |
| bool update; /* True if register needs updates */ |
| bool low; /* True if low limit; for limits with compare |
| functions only */ |
| const char *attr; /* Attribute name */ |
| const char *alarm; /* Alarm attribute name */ |
| }; |
| |
| /* |
| * The pmbus_sensor_attr structure describes one sensor attribute. This |
| * description includes a reference to the associated limit attributes. |
| */ |
| struct pmbus_sensor_attr { |
| u16 reg; /* sensor register */ |
| u16 gbit; /* generic status bit */ |
| u8 nlimit; /* # of limit registers */ |
| enum pmbus_sensor_classes class;/* sensor class */ |
| const char *label; /* sensor label */ |
| bool paged; /* true if paged sensor */ |
| bool update; /* true if update needed */ |
| bool compare; /* true if compare function needed */ |
| u32 func; /* sensor mask */ |
| u32 sfunc; /* sensor status mask */ |
| int sreg; /* status register */ |
| const struct pmbus_limit_attr *limit;/* limit registers */ |
| }; |
| |
| /* |
| * Add a set of limit attributes and, if supported, the associated |
| * alarm attributes. |
| * returns 0 if no alarm register found, 1 if an alarm register was found, |
| * < 0 on errors. |
| */ |
| static int pmbus_add_limit_attrs(struct i2c_client *client, |
| struct pmbus_data *data, |
| const struct pmbus_driver_info *info, |
| const char *name, int index, int page, |
| struct pmbus_sensor *base, |
| const struct pmbus_sensor_attr *attr) |
| { |
| const struct pmbus_limit_attr *l = attr->limit; |
| int nlimit = attr->nlimit; |
| int have_alarm = 0; |
| int i, ret; |
| struct pmbus_sensor *curr; |
| |
| for (i = 0; i < nlimit; i++) { |
| if (pmbus_check_word_register(client, page, l->reg)) { |
| curr = pmbus_add_sensor(data, name, l->attr, index, |
| page, 0xff, l->reg, attr->class, |
| attr->update || l->update, |
| false, true); |
| if (!curr) |
| return -ENOMEM; |
| if (l->sbit && (info->func[page] & attr->sfunc)) { |
| ret = pmbus_add_boolean(data, name, |
| l->alarm, index, |
| attr->compare ? l->low ? curr : base |
| : NULL, |
| attr->compare ? l->low ? base : curr |
| : NULL, |
| page, attr->sreg, l->sbit); |
| if (ret) |
| return ret; |
| have_alarm = 1; |
| } |
| } |
| l++; |
| } |
| return have_alarm; |
| } |
| |
| static int pmbus_add_sensor_attrs_one(struct i2c_client *client, |
| struct pmbus_data *data, |
| const struct pmbus_driver_info *info, |
| const char *name, |
| int index, int page, int phase, |
| const struct pmbus_sensor_attr *attr, |
| bool paged) |
| { |
| struct pmbus_sensor *base; |
| bool upper = !!(attr->gbit & 0xff00); /* need to check STATUS_WORD */ |
| int ret; |
| |
| if (attr->label) { |
| ret = pmbus_add_label(data, name, index, attr->label, |
| paged ? page + 1 : 0, phase); |
| if (ret) |
| return ret; |
| } |
| base = pmbus_add_sensor(data, name, "input", index, page, phase, |
| attr->reg, attr->class, true, true, true); |
| if (!base) |
| return -ENOMEM; |
| /* No limit and alarm attributes for phase specific sensors */ |
| if (attr->sfunc && phase == 0xff) { |
| ret = pmbus_add_limit_attrs(client, data, info, name, |
| index, page, base, attr); |
| if (ret < 0) |
| return ret; |
| /* |
| * Add generic alarm attribute only if there are no individual |
| * alarm attributes, if there is a global alarm bit, and if |
| * the generic status register (word or byte, depending on |
| * which global bit is set) for this page is accessible. |
| */ |
| if (!ret && attr->gbit && |
| (!upper || data->has_status_word) && |
| pmbus_check_status_register(client, page)) { |
| ret = pmbus_add_boolean(data, name, "alarm", index, |
| NULL, NULL, |
| page, PMBUS_STATUS_WORD, |
| attr->gbit); |
| if (ret) |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| static bool pmbus_sensor_is_paged(const struct pmbus_driver_info *info, |
| const struct pmbus_sensor_attr *attr) |
| { |
| int p; |
| |
| if (attr->paged) |
| return true; |
| |
| /* |
| * Some attributes may be present on more than one page despite |
| * not being marked with the paged attribute. If that is the case, |
| * then treat the sensor as being paged and add the page suffix to the |
| * attribute name. |
| * We don't just add the paged attribute to all such attributes, in |
| * order to maintain the un-suffixed labels in the case where the |
| * attribute is only on page 0. |
| */ |
| for (p = 1; p < info->pages; p++) { |
| if (info->func[p] & attr->func) |
| return true; |
| } |
| return false; |
| } |
| |
| static int pmbus_add_sensor_attrs(struct i2c_client *client, |
| struct pmbus_data *data, |
| const char *name, |
| const struct pmbus_sensor_attr *attrs, |
| int nattrs) |
| { |
| const struct pmbus_driver_info *info = data->info; |
| int index, i; |
| int ret; |
| |
| index = 1; |
| for (i = 0; i < nattrs; i++) { |
| int page, pages; |
| bool paged = pmbus_sensor_is_paged(info, attrs); |
| |
| pages = paged ? info->pages : 1; |
| for (page = 0; page < pages; page++) { |
| if (info->func[page] & attrs->func) { |
| ret = pmbus_add_sensor_attrs_one(client, data, info, |
| name, index, page, |
| 0xff, attrs, paged); |
| if (ret) |
| return ret; |
| index++; |
| } |
| if (info->phases[page]) { |
| int phase; |
| |
| for (phase = 0; phase < info->phases[page]; |
| phase++) { |
| if (!(info->pfunc[phase] & attrs->func)) |
| continue; |
| ret = pmbus_add_sensor_attrs_one(client, |
| data, info, name, index, page, |
| phase, attrs, paged); |
| if (ret) |
| return ret; |
| index++; |
| } |
| } |
| } |
| attrs++; |
| } |
| return 0; |
| } |
| |
| static const struct pmbus_limit_attr vin_limit_attrs[] = { |
| { |
| .reg = PMBUS_VIN_UV_WARN_LIMIT, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_VOLTAGE_UV_WARNING, |
| }, { |
| .reg = PMBUS_VIN_UV_FAULT_LIMIT, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_VOLTAGE_UV_FAULT | PB_VOLTAGE_VIN_OFF, |
| }, { |
| .reg = PMBUS_VIN_OV_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_VOLTAGE_OV_WARNING, |
| }, { |
| .reg = PMBUS_VIN_OV_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_VOLTAGE_OV_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_VIN_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_VIN_MIN, |
| .update = true, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_VIN_MAX, |
| .update = true, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_VIN_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_VIN_MIN, |
| .attr = "rated_min", |
| }, { |
| .reg = PMBUS_MFR_VIN_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_limit_attr vmon_limit_attrs[] = { |
| { |
| .reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_VOLTAGE_UV_WARNING, |
| }, { |
| .reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_VOLTAGE_UV_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_VOLTAGE_OV_WARNING, |
| }, { |
| .reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_VOLTAGE_OV_FAULT, |
| } |
| }; |
| |
| static const struct pmbus_limit_attr vout_limit_attrs[] = { |
| { |
| .reg = PMBUS_VOUT_UV_WARN_LIMIT, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_VOLTAGE_UV_WARNING, |
| }, { |
| .reg = PMBUS_VOUT_UV_FAULT_LIMIT, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_VOLTAGE_UV_FAULT, |
| }, { |
| .reg = PMBUS_VOUT_OV_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_VOLTAGE_OV_WARNING, |
| }, { |
| .reg = PMBUS_VOUT_OV_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_VOLTAGE_OV_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_VOUT_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_VOUT_MIN, |
| .update = true, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_VOUT_MAX, |
| .update = true, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_VOUT_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_VOUT_MIN, |
| .attr = "rated_min", |
| }, { |
| .reg = PMBUS_MFR_VOUT_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_sensor_attr voltage_attributes[] = { |
| { |
| .reg = PMBUS_READ_VIN, |
| .class = PSC_VOLTAGE_IN, |
| .label = "vin", |
| .func = PMBUS_HAVE_VIN, |
| .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| .sreg = PMBUS_STATUS_INPUT, |
| .gbit = PB_STATUS_VIN_UV, |
| .limit = vin_limit_attrs, |
| .nlimit = ARRAY_SIZE(vin_limit_attrs), |
| }, { |
| .reg = PMBUS_VIRT_READ_VMON, |
| .class = PSC_VOLTAGE_IN, |
| .label = "vmon", |
| .func = PMBUS_HAVE_VMON, |
| .sfunc = PMBUS_HAVE_STATUS_VMON, |
| .sreg = PMBUS_VIRT_STATUS_VMON, |
| .limit = vmon_limit_attrs, |
| .nlimit = ARRAY_SIZE(vmon_limit_attrs), |
| }, { |
| .reg = PMBUS_READ_VCAP, |
| .class = PSC_VOLTAGE_IN, |
| .label = "vcap", |
| .func = PMBUS_HAVE_VCAP, |
| }, { |
| .reg = PMBUS_READ_VOUT, |
| .class = PSC_VOLTAGE_OUT, |
| .label = "vout", |
| .paged = true, |
| .func = PMBUS_HAVE_VOUT, |
| .sfunc = PMBUS_HAVE_STATUS_VOUT, |
| .sreg = PMBUS_STATUS_VOUT, |
| .gbit = PB_STATUS_VOUT_OV, |
| .limit = vout_limit_attrs, |
| .nlimit = ARRAY_SIZE(vout_limit_attrs), |
| } |
| }; |
| |
| /* Current attributes */ |
| |
| static const struct pmbus_limit_attr iin_limit_attrs[] = { |
| { |
| .reg = PMBUS_IIN_OC_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_IIN_OC_WARNING, |
| }, { |
| .reg = PMBUS_IIN_OC_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_IIN_OC_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_IIN_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_IIN_MIN, |
| .update = true, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_IIN_MAX, |
| .update = true, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_IIN_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_IIN_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_limit_attr iout_limit_attrs[] = { |
| { |
| .reg = PMBUS_IOUT_OC_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_IOUT_OC_WARNING, |
| }, { |
| .reg = PMBUS_IOUT_UC_FAULT_LIMIT, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_IOUT_UC_FAULT, |
| }, { |
| .reg = PMBUS_IOUT_OC_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_IOUT_OC_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_IOUT_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_IOUT_MIN, |
| .update = true, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_IOUT_MAX, |
| .update = true, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_IOUT_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_IOUT_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_sensor_attr current_attributes[] = { |
| { |
| .reg = PMBUS_READ_IIN, |
| .class = PSC_CURRENT_IN, |
| .label = "iin", |
| .func = PMBUS_HAVE_IIN, |
| .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| .sreg = PMBUS_STATUS_INPUT, |
| .gbit = PB_STATUS_INPUT, |
| .limit = iin_limit_attrs, |
| .nlimit = ARRAY_SIZE(iin_limit_attrs), |
| }, { |
| .reg = PMBUS_READ_IOUT, |
| .class = PSC_CURRENT_OUT, |
| .label = "iout", |
| .paged = true, |
| .func = PMBUS_HAVE_IOUT, |
| .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| .sreg = PMBUS_STATUS_IOUT, |
| .gbit = PB_STATUS_IOUT_OC, |
| .limit = iout_limit_attrs, |
| .nlimit = ARRAY_SIZE(iout_limit_attrs), |
| } |
| }; |
| |
| /* Power attributes */ |
| |
| static const struct pmbus_limit_attr pin_limit_attrs[] = { |
| { |
| .reg = PMBUS_PIN_OP_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "alarm", |
| .sbit = PB_PIN_OP_WARNING, |
| }, { |
| .reg = PMBUS_VIRT_READ_PIN_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_PIN_MIN, |
| .update = true, |
| .attr = "input_lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_PIN_MAX, |
| .update = true, |
| .attr = "input_highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_PIN_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_PIN_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_limit_attr pout_limit_attrs[] = { |
| { |
| .reg = PMBUS_POUT_MAX, |
| .attr = "cap", |
| .alarm = "cap_alarm", |
| .sbit = PB_POWER_LIMITING, |
| }, { |
| .reg = PMBUS_POUT_OP_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_POUT_OP_WARNING, |
| }, { |
| .reg = PMBUS_POUT_OP_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_POUT_OP_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_POUT_AVG, |
| .update = true, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_POUT_MIN, |
| .update = true, |
| .attr = "input_lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_POUT_MAX, |
| .update = true, |
| .attr = "input_highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_POUT_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_POUT_MAX, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_sensor_attr power_attributes[] = { |
| { |
| .reg = PMBUS_READ_PIN, |
| .class = PSC_POWER, |
| .label = "pin", |
| .func = PMBUS_HAVE_PIN, |
| .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| .sreg = PMBUS_STATUS_INPUT, |
| .gbit = PB_STATUS_INPUT, |
| .limit = pin_limit_attrs, |
| .nlimit = ARRAY_SIZE(pin_limit_attrs), |
| }, { |
| .reg = PMBUS_READ_POUT, |
| .class = PSC_POWER, |
| .label = "pout", |
| .paged = true, |
| .func = PMBUS_HAVE_POUT, |
| .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| .sreg = PMBUS_STATUS_IOUT, |
| .limit = pout_limit_attrs, |
| .nlimit = ARRAY_SIZE(pout_limit_attrs), |
| } |
| }; |
| |
| /* Temperature atributes */ |
| |
| static const struct pmbus_limit_attr temp_limit_attrs[] = { |
| { |
| .reg = PMBUS_UT_WARN_LIMIT, |
| .low = true, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_TEMP_UT_WARNING, |
| }, { |
| .reg = PMBUS_UT_FAULT_LIMIT, |
| .low = true, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_TEMP_UT_FAULT, |
| }, { |
| .reg = PMBUS_OT_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_TEMP_OT_WARNING, |
| }, { |
| .reg = PMBUS_OT_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_TEMP_OT_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP_MIN, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP_AVG, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP_MAX, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_TEMP_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_MAX_TEMP_1, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_limit_attr temp_limit_attrs2[] = { |
| { |
| .reg = PMBUS_UT_WARN_LIMIT, |
| .low = true, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_TEMP_UT_WARNING, |
| }, { |
| .reg = PMBUS_UT_FAULT_LIMIT, |
| .low = true, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_TEMP_UT_FAULT, |
| }, { |
| .reg = PMBUS_OT_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_TEMP_OT_WARNING, |
| }, { |
| .reg = PMBUS_OT_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_TEMP_OT_FAULT, |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP2_MIN, |
| .attr = "lowest", |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP2_AVG, |
| .attr = "average", |
| }, { |
| .reg = PMBUS_VIRT_READ_TEMP2_MAX, |
| .attr = "highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY, |
| .attr = "reset_history", |
| }, { |
| .reg = PMBUS_MFR_MAX_TEMP_2, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_limit_attr temp_limit_attrs3[] = { |
| { |
| .reg = PMBUS_UT_WARN_LIMIT, |
| .low = true, |
| .attr = "min", |
| .alarm = "min_alarm", |
| .sbit = PB_TEMP_UT_WARNING, |
| }, { |
| .reg = PMBUS_UT_FAULT_LIMIT, |
| .low = true, |
| .attr = "lcrit", |
| .alarm = "lcrit_alarm", |
| .sbit = PB_TEMP_UT_FAULT, |
| }, { |
| .reg = PMBUS_OT_WARN_LIMIT, |
| .attr = "max", |
| .alarm = "max_alarm", |
| .sbit = PB_TEMP_OT_WARNING, |
| }, { |
| .reg = PMBUS_OT_FAULT_LIMIT, |
| .attr = "crit", |
| .alarm = "crit_alarm", |
| .sbit = PB_TEMP_OT_FAULT, |
| }, { |
| .reg = PMBUS_MFR_MAX_TEMP_3, |
| .attr = "rated_max", |
| }, |
| }; |
| |
| static const struct pmbus_sensor_attr temp_attributes[] = { |
| { |
| .reg = PMBUS_READ_TEMPERATURE_1, |
| .class = PSC_TEMPERATURE, |
| .paged = true, |
| .update = true, |
| .compare = true, |
| .func = PMBUS_HAVE_TEMP, |
| .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| .sreg = PMBUS_STATUS_TEMPERATURE, |
| .gbit = PB_STATUS_TEMPERATURE, |
| .limit = temp_limit_attrs, |
| .nlimit = ARRAY_SIZE(temp_limit_attrs), |
| }, { |
| .reg = PMBUS_READ_TEMPERATURE_2, |
| .class = PSC_TEMPERATURE, |
| .paged = true, |
| .update = true, |
| .compare = true, |
| .func = PMBUS_HAVE_TEMP2, |
| .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| .sreg = PMBUS_STATUS_TEMPERATURE, |
| .gbit = PB_STATUS_TEMPERATURE, |
| .limit = temp_limit_attrs2, |
| .nlimit = ARRAY_SIZE(temp_limit_attrs2), |
| }, { |
| .reg = PMBUS_READ_TEMPERATURE_3, |
| .class = PSC_TEMPERATURE, |
| .paged = true, |
| .update = true, |
| .compare = true, |
| .func = PMBUS_HAVE_TEMP3, |
| .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| .sreg = PMBUS_STATUS_TEMPERATURE, |
| .gbit = PB_STATUS_TEMPERATURE, |
| .limit = temp_limit_attrs3, |
| .nlimit = ARRAY_SIZE(temp_limit_attrs3), |
| } |
| }; |
| |
| static const int pmbus_fan_registers[] = { |
| PMBUS_READ_FAN_SPEED_1, |
| PMBUS_READ_FAN_SPEED_2, |
| PMBUS_READ_FAN_SPEED_3, |
| PMBUS_READ_FAN_SPEED_4 |
| }; |
| |
| static const int pmbus_fan_status_registers[] = { |
| PMBUS_STATUS_FAN_12, |
| PMBUS_STATUS_FAN_12, |
| PMBUS_STATUS_FAN_34, |
| PMBUS_STATUS_FAN_34 |
| }; |
| |
| static const u32 pmbus_fan_flags[] = { |
| PMBUS_HAVE_FAN12, |
| PMBUS_HAVE_FAN12, |
| PMBUS_HAVE_FAN34, |
| PMBUS_HAVE_FAN34 |
| }; |
| |
| static const u32 pmbus_fan_status_flags[] = { |
| PMBUS_HAVE_STATUS_FAN12, |
| PMBUS_HAVE_STATUS_FAN12, |
| PMBUS_HAVE_STATUS_FAN34, |
| PMBUS_HAVE_STATUS_FAN34 |
| }; |
| |
| /* Fans */ |
| |
| /* Precondition: FAN_CONFIG_x_y and FAN_COMMAND_x must exist for the fan ID */ |
| static int pmbus_add_fan_ctrl(struct i2c_client *client, |
| struct pmbus_data *data, int index, int page, int id, |
| u8 config) |
| { |
| struct pmbus_sensor *sensor; |
| |
| sensor = pmbus_add_sensor(data, "fan", "target", index, page, |
| 0xff, PMBUS_VIRT_FAN_TARGET_1 + id, PSC_FAN, |
| false, false, true); |
| |
| if (!sensor) |
| return -ENOMEM; |
| |
| if (!((data->info->func[page] & PMBUS_HAVE_PWM12) || |
| (data->info->func[page] & PMBUS_HAVE_PWM34))) |
| return 0; |
| |
| sensor = pmbus_add_sensor(data, "pwm", NULL, index, page, |
| 0xff, PMBUS_VIRT_PWM_1 + id, PSC_PWM, |
| false, false, true); |
| |
| if (!sensor) |
| return -ENOMEM; |
| |
| sensor = pmbus_add_sensor(data, "pwm", "enable", index, page, |
| 0xff, PMBUS_VIRT_PWM_ENABLE_1 + id, PSC_PWM, |
| true, false, false); |
| |
| if (!sensor) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int pmbus_add_fan_attributes(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| const struct pmbus_driver_info *info = data->info; |
| int index = 1; |
| int page; |
| int ret; |
| |
| for (page = 0; page < info->pages; page++) { |
| int f; |
| |
| for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { |
| int regval; |
| |
| if (!(info->func[page] & pmbus_fan_flags[f])) |
| break; |
| |
| if (!pmbus_check_word_register(client, page, |
| pmbus_fan_registers[f])) |
| break; |
| |
| /* |
| * Skip fan if not installed. |
| * Each fan configuration register covers multiple fans, |
| * so we have to do some magic. |
| */ |
| regval = _pmbus_read_byte_data(client, page, |
| pmbus_fan_config_registers[f]); |
| if (regval < 0 || |
| (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) |
| continue; |
| |
| if (pmbus_add_sensor(data, "fan", "input", index, |
| page, 0xff, pmbus_fan_registers[f], |
| PSC_FAN, true, true, true) == NULL) |
| return -ENOMEM; |
| |
| /* Fan control */ |
| if (pmbus_check_word_register(client, page, |
| pmbus_fan_command_registers[f])) { |
| ret = pmbus_add_fan_ctrl(client, data, index, |
| page, f, regval); |
| if (ret < 0) |
| return ret; |
| } |
| |
| /* |
| * Each fan status register covers multiple fans, |
| * so we have to do some magic. |
| */ |
| if ((info->func[page] & pmbus_fan_status_flags[f]) && |
| pmbus_check_byte_register(client, |
| page, pmbus_fan_status_registers[f])) { |
| int reg; |
| |
| if (f > 1) /* fan 3, 4 */ |
| reg = PMBUS_STATUS_FAN_34; |
| else |
| reg = PMBUS_STATUS_FAN_12; |
| ret = pmbus_add_boolean(data, "fan", |
| "alarm", index, NULL, NULL, page, reg, |
| PB_FAN_FAN1_WARNING >> (f & 1)); |
| if (ret) |
| return ret; |
| ret = pmbus_add_boolean(data, "fan", |
| "fault", index, NULL, NULL, page, reg, |
| PB_FAN_FAN1_FAULT >> (f & 1)); |
| if (ret) |
| return ret; |
| } |
| index++; |
| } |
| } |
| return 0; |
| } |
| |
| struct pmbus_samples_attr { |
| int reg; |
| char *name; |
| }; |
| |
| struct pmbus_samples_reg { |
| int page; |
| struct pmbus_samples_attr *attr; |
| struct device_attribute dev_attr; |
| }; |
| |
| static struct pmbus_samples_attr pmbus_samples_registers[] = { |
| { |
| .reg = PMBUS_VIRT_SAMPLES, |
| .name = "samples", |
| }, { |
| .reg = PMBUS_VIRT_IN_SAMPLES, |
| .name = "in_samples", |
| }, { |
| .reg = PMBUS_VIRT_CURR_SAMPLES, |
| .name = "curr_samples", |
| }, { |
| .reg = PMBUS_VIRT_POWER_SAMPLES, |
| .name = "power_samples", |
| }, { |
| .reg = PMBUS_VIRT_TEMP_SAMPLES, |
| .name = "temp_samples", |
| } |
| }; |
| |
| #define to_samples_reg(x) container_of(x, struct pmbus_samples_reg, dev_attr) |
| |
| static ssize_t pmbus_show_samples(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| int val; |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_samples_reg *reg = to_samples_reg(devattr); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| mutex_lock(&data->update_lock); |
| val = _pmbus_read_word_data(client, reg->page, 0xff, reg->attr->reg); |
| mutex_unlock(&data->update_lock); |
| if (val < 0) |
| return val; |
| |
| return sysfs_emit(buf, "%d\n", val); |
| } |
| |
| static ssize_t pmbus_set_samples(struct device *dev, |
| struct device_attribute *devattr, |
| const char *buf, size_t count) |
| { |
| int ret; |
| long val; |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_samples_reg *reg = to_samples_reg(devattr); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| if (kstrtol(buf, 0, &val) < 0) |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| ret = _pmbus_write_word_data(client, reg->page, reg->attr->reg, val); |
| mutex_unlock(&data->update_lock); |
| |
| return ret ? : count; |
| } |
| |
| static int pmbus_add_samples_attr(struct pmbus_data *data, int page, |
| struct pmbus_samples_attr *attr) |
| { |
| struct pmbus_samples_reg *reg; |
| |
| reg = devm_kzalloc(data->dev, sizeof(*reg), GFP_KERNEL); |
| if (!reg) |
| return -ENOMEM; |
| |
| reg->attr = attr; |
| reg->page = page; |
| |
| pmbus_dev_attr_init(®->dev_attr, attr->name, 0644, |
| pmbus_show_samples, pmbus_set_samples); |
| |
| return pmbus_add_attribute(data, ®->dev_attr.attr); |
| } |
| |
| static int pmbus_add_samples_attributes(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| const struct pmbus_driver_info *info = data->info; |
| int s; |
| |
| if (!(info->func[0] & PMBUS_HAVE_SAMPLES)) |
| return 0; |
| |
| for (s = 0; s < ARRAY_SIZE(pmbus_samples_registers); s++) { |
| struct pmbus_samples_attr *attr; |
| int ret; |
| |
| attr = &pmbus_samples_registers[s]; |
| if (!pmbus_check_word_register(client, 0, attr->reg)) |
| continue; |
| |
| ret = pmbus_add_samples_attr(data, 0, attr); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int pmbus_find_attributes(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| int ret; |
| |
| /* Voltage sensors */ |
| ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes, |
| ARRAY_SIZE(voltage_attributes)); |
| if (ret) |
| return ret; |
| |
| /* Current sensors */ |
| ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes, |
| ARRAY_SIZE(current_attributes)); |
| if (ret) |
| return ret; |
| |
| /* Power sensors */ |
| ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes, |
| ARRAY_SIZE(power_attributes)); |
| if (ret) |
| return ret; |
| |
| /* Temperature sensors */ |
| ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes, |
| ARRAY_SIZE(temp_attributes)); |
| if (ret) |
| return ret; |
| |
| /* Fans */ |
| ret = pmbus_add_fan_attributes(client, data); |
| if (ret) |
| return ret; |
| |
| ret = pmbus_add_samples_attributes(client, data); |
| return ret; |
| } |
| |
| /* |
| * The pmbus_class_attr_map structure maps one sensor class to |
| * it's corresponding sensor attributes array. |
| */ |
| struct pmbus_class_attr_map { |
| enum pmbus_sensor_classes class; |
| int nattr; |
| const struct pmbus_sensor_attr *attr; |
| }; |
| |
| static const struct pmbus_class_attr_map class_attr_map[] = { |
| { |
| .class = PSC_VOLTAGE_IN, |
| .attr = voltage_attributes, |
| .nattr = ARRAY_SIZE(voltage_attributes), |
| }, { |
| .class = PSC_VOLTAGE_OUT, |
| .attr = voltage_attributes, |
| .nattr = ARRAY_SIZE(voltage_attributes), |
| }, { |
| .class = PSC_CURRENT_IN, |
| .attr = current_attributes, |
| .nattr = ARRAY_SIZE(current_attributes), |
| }, { |
| .class = PSC_CURRENT_OUT, |
| .attr = current_attributes, |
| .nattr = ARRAY_SIZE(current_attributes), |
| }, { |
| .class = PSC_POWER, |
| .attr = power_attributes, |
| .nattr = ARRAY_SIZE(power_attributes), |
| }, { |
| .class = PSC_TEMPERATURE, |
| .attr = temp_attributes, |
| .nattr = ARRAY_SIZE(temp_attributes), |
| } |
| }; |
| |
| /* |
| * Read the coefficients for direct mode. |
| */ |
| static int pmbus_read_coefficients(struct i2c_client *client, |
| struct pmbus_driver_info *info, |
| const struct pmbus_sensor_attr *attr) |
| { |
| int rv; |
| union i2c_smbus_data data; |
| enum pmbus_sensor_classes class = attr->class; |
| s8 R; |
| s16 m, b; |
| |
| data.block[0] = 2; |
| data.block[1] = attr->reg; |
| data.block[2] = 0x01; |
| |
| rv = i2c_smbus_xfer(client->adapter, client->addr, client->flags, |
| I2C_SMBUS_WRITE, PMBUS_COEFFICIENTS, |
| I2C_SMBUS_BLOCK_PROC_CALL, &data); |
| |
| if (rv < 0) |
| return rv; |
| |
| if (data.block[0] != 5) |
| return -EIO; |
| |
| m = data.block[1] | (data.block[2] << 8); |
| b = data.block[3] | (data.block[4] << 8); |
| R = data.block[5]; |
| info->m[class] = m; |
| info->b[class] = b; |
| info->R[class] = R; |
| |
| return rv; |
| } |
| |
| static int pmbus_init_coefficients(struct i2c_client *client, |
| struct pmbus_driver_info *info) |
| { |
| int i, n, ret = -EINVAL; |
| const struct pmbus_class_attr_map *map; |
| const struct pmbus_sensor_attr *attr; |
| |
| for (i = 0; i < ARRAY_SIZE(class_attr_map); i++) { |
| map = &class_attr_map[i]; |
| if (info->format[map->class] != direct) |
| continue; |
| for (n = 0; n < map->nattr; n++) { |
| attr = &map->attr[n]; |
| if (map->class != attr->class) |
| continue; |
| ret = pmbus_read_coefficients(client, info, attr); |
| if (ret >= 0) |
| break; |
| } |
| if (ret < 0) { |
| dev_err(&client->dev, |
| "No coefficients found for sensor class %d\n", |
| map->class); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Identify chip parameters. |
| * This function is called for all chips. |
| */ |
| static int pmbus_identify_common(struct i2c_client *client, |
| struct pmbus_data *data, int page) |
| { |
| int vout_mode = -1; |
| |
| if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE)) |
| vout_mode = _pmbus_read_byte_data(client, page, |
| PMBUS_VOUT_MODE); |
| if (vout_mode >= 0 && vout_mode != 0xff) { |
| /* |
| * Not all chips support the VOUT_MODE command, |
| * so a failure to read it is not an error. |
| */ |
| switch (vout_mode >> 5) { |
| case 0: /* linear mode */ |
| if (data->info->format[PSC_VOLTAGE_OUT] != linear) |
| return -ENODEV; |
| |
| data->exponent[page] = ((s8)(vout_mode << 3)) >> 3; |
| break; |
| case 1: /* VID mode */ |
| if (data->info->format[PSC_VOLTAGE_OUT] != vid) |
| return -ENODEV; |
| break; |
| case 2: /* direct mode */ |
| if (data->info->format[PSC_VOLTAGE_OUT] != direct) |
| return -ENODEV; |
| break; |
| case 3: /* ieee 754 half precision */ |
| if (data->info->format[PSC_VOLTAGE_OUT] != ieee754) |
| return -ENODEV; |
| break; |
| default: |
| return -ENODEV; |
| } |
| } |
| |
| pmbus_clear_fault_page(client, page); |
| return 0; |
| } |
| |
| static int pmbus_read_status_byte(struct i2c_client *client, int page) |
| { |
| return _pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE); |
| } |
| |
| static int pmbus_read_status_word(struct i2c_client *client, int page) |
| { |
| return _pmbus_read_word_data(client, page, 0xff, PMBUS_STATUS_WORD); |
| } |
| |
| /* PEC attribute support */ |
| |
| static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
| char *buf) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| |
| return sysfs_emit(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
| } |
| |
| static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
| const char *buf, size_t count) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| bool enable; |
| int err; |
| |
| err = kstrtobool(buf, &enable); |
| if (err < 0) |
| return err; |
| |
| if (enable) |
| client->flags |= I2C_CLIENT_PEC; |
| else |
| client->flags &= ~I2C_CLIENT_PEC; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_RW(pec); |
| |
| static void pmbus_remove_pec(void *dev) |
| { |
| device_remove_file(dev, &dev_attr_pec); |
| } |
| |
| static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, |
| struct pmbus_driver_info *info) |
| { |
| struct device *dev = &client->dev; |
| int page, ret; |
| |
| /* |
| * Figure out if PEC is enabled before accessing any other register. |
| * Make sure PEC is disabled, will be enabled later if needed. |
| */ |
| client->flags &= ~I2C_CLIENT_PEC; |
| |
| /* Enable PEC if the controller and bus supports it */ |
| if (!(data->flags & PMBUS_NO_CAPABILITY)) { |
| ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); |
| if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) { |
| if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_PEC)) |
| client->flags |= I2C_CLIENT_PEC; |
| } |
| } |
| |
| /* |
| * Some PMBus chips don't support PMBUS_STATUS_WORD, so try |
| * to use PMBUS_STATUS_BYTE instead if that is the case. |
| * Bail out if both registers are not supported. |
| */ |
| data->read_status = pmbus_read_status_word; |
| ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD); |
| if (ret < 0 || ret == 0xffff) { |
| data->read_status = pmbus_read_status_byte; |
| ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE); |
| if (ret < 0 || ret == 0xff) { |
| dev_err(dev, "PMBus status register not found\n"); |
| return -ENODEV; |
| } |
| } else { |
| data->has_status_word = true; |
| } |
| |
| /* |
| * Check if the chip is write protected. If it is, we can not clear |
| * faults, and we should not try it. Also, in that case, writes into |
| * limit registers need to be disabled. |
| */ |
| if (!(data->flags & PMBUS_NO_WRITE_PROTECT)) { |
| ret = i2c_smbus_read_byte_data(client, PMBUS_WRITE_PROTECT); |
| if (ret > 0 && (ret & PB_WP_ANY)) |
| data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK; |
| } |
| |
| if (data->info->pages) |
| pmbus_clear_faults(client); |
| else |
| pmbus_clear_fault_page(client, -1); |
| |
| if (info->identify) { |
| ret = (*info->identify)(client, info); |
| if (ret < 0) { |
| dev_err(dev, "Chip identification failed\n"); |
| return ret; |
| } |
| } |
| |
| if (info->pages <= 0 || info->pages > PMBUS_PAGES) { |
| dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages); |
| return -ENODEV; |
| } |
| |
| for (page = 0; page < info->pages; page++) { |
| ret = pmbus_identify_common(client, data, page); |
| if (ret < 0) { |
| dev_err(dev, "Failed to identify chip capabilities\n"); |
| return ret; |
| } |
| } |
| |
| if (data->flags & PMBUS_USE_COEFFICIENTS_CMD) { |
| if (!i2c_check_functionality(client->adapter, |
| I2C_FUNC_SMBUS_BLOCK_PROC_CALL)) |
| return -ENODEV; |
| |
| ret = pmbus_init_coefficients(client, info); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (client->flags & I2C_CLIENT_PEC) { |
| /* |
| * If I2C_CLIENT_PEC is set here, both the I2C adapter and the |
| * chip support PEC. Add 'pec' attribute to client device to let |
| * the user control it. |
| */ |
| ret = device_create_file(dev, &dev_attr_pec); |
| if (ret) |
| return ret; |
| ret = devm_add_action_or_reset(dev, pmbus_remove_pec, dev); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| #if IS_ENABLED(CONFIG_REGULATOR) |
| static int pmbus_regulator_is_enabled(struct regulator_dev *rdev) |
| { |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| u8 page = rdev_get_id(rdev); |
| int ret; |
| |
| mutex_lock(&data->update_lock); |
| ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION); |
| mutex_unlock(&data->update_lock); |
| |
| if (ret < 0) |
| return ret; |
| |
| return !!(ret & PB_OPERATION_CONTROL_ON); |
| } |
| |
| static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable) |
| { |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| u8 page = rdev_get_id(rdev); |
| int ret; |
| |
| mutex_lock(&data->update_lock); |
| ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION, |
| PB_OPERATION_CONTROL_ON, |
| enable ? PB_OPERATION_CONTROL_ON : 0); |
| mutex_unlock(&data->update_lock); |
| |
| return ret; |
| } |
| |
| static int pmbus_regulator_enable(struct regulator_dev *rdev) |
| { |
| return _pmbus_regulator_on_off(rdev, 1); |
| } |
| |
| static int pmbus_regulator_disable(struct regulator_dev *rdev) |
| { |
| return _pmbus_regulator_on_off(rdev, 0); |
| } |
| |
| /* A PMBus status flag and the corresponding REGULATOR_ERROR_* flag */ |
| struct pmbus_regulator_status_assoc { |
| int pflag, rflag; |
| }; |
| |
| /* PMBus->regulator bit mappings for a PMBus status register */ |
| struct pmbus_regulator_status_category { |
| int func; |
| int reg; |
| const struct pmbus_regulator_status_assoc *bits; /* zero-terminated */ |
| }; |
| |
| static const struct pmbus_regulator_status_category pmbus_regulator_flag_map[] = { |
| { |
| .func = PMBUS_HAVE_STATUS_VOUT, |
| .reg = PMBUS_STATUS_VOUT, |
| .bits = (const struct pmbus_regulator_status_assoc[]) { |
| { PB_VOLTAGE_UV_WARNING, REGULATOR_ERROR_UNDER_VOLTAGE_WARN }, |
| { PB_VOLTAGE_UV_FAULT, REGULATOR_ERROR_UNDER_VOLTAGE }, |
| { PB_VOLTAGE_OV_WARNING, REGULATOR_ERROR_OVER_VOLTAGE_WARN }, |
| { PB_VOLTAGE_OV_FAULT, REGULATOR_ERROR_REGULATION_OUT }, |
| { }, |
| }, |
| }, { |
| .func = PMBUS_HAVE_STATUS_IOUT, |
| .reg = PMBUS_STATUS_IOUT, |
| .bits = (const struct pmbus_regulator_status_assoc[]) { |
| { PB_IOUT_OC_WARNING, REGULATOR_ERROR_OVER_CURRENT_WARN }, |
| { PB_IOUT_OC_FAULT, REGULATOR_ERROR_OVER_CURRENT }, |
| { PB_IOUT_OC_LV_FAULT, REGULATOR_ERROR_OVER_CURRENT }, |
| { }, |
| }, |
| }, { |
| .func = PMBUS_HAVE_STATUS_TEMP, |
| .reg = PMBUS_STATUS_TEMPERATURE, |
| .bits = (const struct pmbus_regulator_status_assoc[]) { |
| { PB_TEMP_OT_WARNING, REGULATOR_ERROR_OVER_TEMP_WARN }, |
| { PB_TEMP_OT_FAULT, REGULATOR_ERROR_OVER_TEMP }, |
| { }, |
| }, |
| }, |
| }; |
| |
| static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags) |
| { |
| int i, status; |
| const struct pmbus_regulator_status_category *cat; |
| const struct pmbus_regulator_status_assoc *bit; |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| u8 page = rdev_get_id(rdev); |
| int func = data->info->func[page]; |
| |
| *flags = 0; |
| |
| mutex_lock(&data->update_lock); |
| |
| for (i = 0; i < ARRAY_SIZE(pmbus_regulator_flag_map); i++) { |
| cat = &pmbus_regulator_flag_map[i]; |
| if (!(func & cat->func)) |
| continue; |
| |
| status = _pmbus_read_byte_data(client, page, cat->reg); |
| if (status < 0) { |
| mutex_unlock(&data->update_lock); |
| return status; |
| } |
| |
| for (bit = cat->bits; bit->pflag; bit++) { |
| if (status & bit->pflag) |
| *flags |= bit->rflag; |
| } |
| } |
| |
| /* |
| * Map what bits of STATUS_{WORD,BYTE} we can to REGULATOR_ERROR_* |
| * bits. Some of the other bits are tempting (especially for cases |
| * where we don't have the relevant PMBUS_HAVE_STATUS_* |
| * functionality), but there's an unfortunate ambiguity in that |
| * they're defined as indicating a fault *or* a warning, so we can't |
| * easily determine whether to report REGULATOR_ERROR_<foo> or |
| * REGULATOR_ERROR_<foo>_WARN. |
| */ |
| status = pmbus_get_status(client, page, PMBUS_STATUS_WORD); |
| mutex_unlock(&data->update_lock); |
| if (status < 0) |
| return status; |
| |
| if (pmbus_regulator_is_enabled(rdev) && (status & PB_STATUS_OFF)) |
| *flags |= REGULATOR_ERROR_FAIL; |
| |
| /* |
| * Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are |
| * defined strictly as fault indicators (not warnings). |
| */ |
| if (status & PB_STATUS_IOUT_OC) |
| *flags |= REGULATOR_ERROR_OVER_CURRENT; |
| if (status & PB_STATUS_VOUT_OV) |
| *flags |= REGULATOR_ERROR_REGULATION_OUT; |
| |
| /* |
| * If we haven't discovered any thermal faults or warnings via |
| * PMBUS_STATUS_TEMPERATURE, map PB_STATUS_TEMPERATURE to a warning as |
| * a (conservative) best-effort interpretation. |
| */ |
| if (!(*flags & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) && |
| (status & PB_STATUS_TEMPERATURE)) |
| *flags |= REGULATOR_ERROR_OVER_TEMP_WARN; |
| |
| return 0; |
| } |
| |
| static int pmbus_regulator_get_low_margin(struct i2c_client *client, int page) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor s = { |
| .page = page, |
| .class = PSC_VOLTAGE_OUT, |
| .convert = true, |
| .data = -1, |
| }; |
| |
| if (data->vout_low[page] < 0) { |
| if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MIN)) |
| s.data = _pmbus_read_word_data(client, page, 0xff, |
| PMBUS_MFR_VOUT_MIN); |
| if (s.data < 0) { |
| s.data = _pmbus_read_word_data(client, page, 0xff, |
| PMBUS_VOUT_MARGIN_LOW); |
| if (s.data < 0) |
| return s.data; |
| } |
| data->vout_low[page] = pmbus_reg2data(data, &s); |
| } |
| |
| return data->vout_low[page]; |
| } |
| |
| static int pmbus_regulator_get_high_margin(struct i2c_client *client, int page) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor s = { |
| .page = page, |
| .class = PSC_VOLTAGE_OUT, |
| .convert = true, |
| .data = -1, |
| }; |
| |
| if (data->vout_high[page] < 0) { |
| if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MAX)) |
| s.data = _pmbus_read_word_data(client, page, 0xff, |
| PMBUS_MFR_VOUT_MAX); |
| if (s.data < 0) { |
| s.data = _pmbus_read_word_data(client, page, 0xff, |
| PMBUS_VOUT_MARGIN_HIGH); |
| if (s.data < 0) |
| return s.data; |
| } |
| data->vout_high[page] = pmbus_reg2data(data, &s); |
| } |
| |
| return data->vout_high[page]; |
| } |
| |
| static int pmbus_regulator_get_voltage(struct regulator_dev *rdev) |
| { |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor s = { |
| .page = rdev_get_id(rdev), |
| .class = PSC_VOLTAGE_OUT, |
| .convert = true, |
| }; |
| |
| s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_READ_VOUT); |
| if (s.data < 0) |
| return s.data; |
| |
| return (int)pmbus_reg2data(data, &s) * 1000; /* unit is uV */ |
| } |
| |
| static int pmbus_regulator_set_voltage(struct regulator_dev *rdev, int min_uv, |
| int max_uv, unsigned int *selector) |
| { |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| struct pmbus_sensor s = { |
| .page = rdev_get_id(rdev), |
| .class = PSC_VOLTAGE_OUT, |
| .convert = true, |
| .data = -1, |
| }; |
| int val = DIV_ROUND_CLOSEST(min_uv, 1000); /* convert to mV */ |
| int low, high; |
| |
| *selector = 0; |
| |
| low = pmbus_regulator_get_low_margin(client, s.page); |
| if (low < 0) |
| return low; |
| |
| high = pmbus_regulator_get_high_margin(client, s.page); |
| if (high < 0) |
| return high; |
| |
| /* Make sure we are within margins */ |
| if (low > val) |
| val = low; |
| if (high < val) |
| val = high; |
| |
| val = pmbus_data2reg(data, &s, val); |
| |
| return _pmbus_write_word_data(client, s.page, PMBUS_VOUT_COMMAND, (u16)val); |
| } |
| |
| static int pmbus_regulator_list_voltage(struct regulator_dev *rdev, |
| unsigned int selector) |
| { |
| struct device *dev = rdev_get_dev(rdev); |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| int val, low, high; |
| |
| if (selector >= rdev->desc->n_voltages || |
| selector < rdev->desc->linear_min_sel) |
| return -EINVAL; |
| |
| selector -= rdev->desc->linear_min_sel; |
| val = DIV_ROUND_CLOSEST(rdev->desc->min_uV + |
| (rdev->desc->uV_step * selector), 1000); /* convert to mV */ |
| |
| low = pmbus_regulator_get_low_margin(client, rdev_get_id(rdev)); |
| if (low < 0) |
| return low; |
| |
| high = pmbus_regulator_get_high_margin(client, rdev_get_id(rdev)); |
| if (high < 0) |
| return high; |
| |
| if (val >= low && val <= high) |
| return val * 1000; /* unit is uV */ |
| |
| return 0; |
| } |
| |
| const struct regulator_ops pmbus_regulator_ops = { |
| .enable = pmbus_regulator_enable, |
| .disable = pmbus_regulator_disable, |
| .is_enabled = pmbus_regulator_is_enabled, |
| .get_error_flags = pmbus_regulator_get_error_flags, |
| .get_voltage = pmbus_regulator_get_voltage, |
| .set_voltage = pmbus_regulator_set_voltage, |
| .list_voltage = pmbus_regulator_list_voltage, |
| }; |
| EXPORT_SYMBOL_NS_GPL(pmbus_regulator_ops, PMBUS); |
| |
| static int pmbus_regulator_register(struct pmbus_data *data) |
| { |
| struct device *dev = data->dev; |
| const struct pmbus_driver_info *info = data->info; |
| const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
| struct regulator_dev *rdev; |
| int i; |
| |
| for (i = 0; i < info->num_regulators; i++) { |
| struct regulator_config config = { }; |
| |
| config.dev = dev; |
| config.driver_data = data; |
| |
| if (pdata && pdata->reg_init_data) |
| config.init_data = &pdata->reg_init_data[i]; |
| |
| rdev = devm_regulator_register(dev, &info->reg_desc[i], |
| &config); |
| if (IS_ERR(rdev)) |
| return dev_err_probe(dev, PTR_ERR(rdev), |
| "Failed to register %s regulator\n", |
| info->reg_desc[i].name); |
| } |
| |
| return 0; |
| } |
| #else |
| static int pmbus_regulator_register(struct pmbus_data *data) |
| { |
| return 0; |
| } |
| #endif |
| |
| static struct dentry *pmbus_debugfs_dir; /* pmbus debugfs directory */ |
| |
| #if IS_ENABLED(CONFIG_DEBUG_FS) |
| static int pmbus_debugfs_get(void *data, u64 *val) |
| { |
| int rc; |
| struct pmbus_debugfs_entry *entry = data; |
| |
| rc = _pmbus_read_byte_data(entry->client, entry->page, entry->reg); |
| if (rc < 0) |
| return rc; |
| |
| *val = rc; |
| |
| return 0; |
| } |
| DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops, pmbus_debugfs_get, NULL, |
| "0x%02llx\n"); |
| |
| static int pmbus_debugfs_get_status(void *data, u64 *val) |
| { |
| int rc; |
| struct pmbus_debugfs_entry *entry = data; |
| struct pmbus_data *pdata = i2c_get_clientdata(entry->client); |
| |
| rc = pdata->read_status(entry->client, entry->page); |
| if (rc < 0) |
| return rc; |
| |
| *val = rc; |
| |
| return 0; |
| } |
| DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status, |
| NULL, "0x%04llx\n"); |
| |
| static ssize_t pmbus_debugfs_mfr_read(struct file *file, char __user *buf, |
| size_t count, loff_t *ppos) |
| { |
| int rc; |
| struct pmbus_debugfs_entry *entry = file->private_data; |
| char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; |
| |
| rc = pmbus_read_block_data(entry->client, entry->page, entry->reg, |
| data); |
| if (rc < 0) |
| return rc; |
| |
| /* Add newline at the end of a read data */ |
| data[rc] = '\n'; |
| |
| /* Include newline into the length */ |
| rc += 1; |
| |
| return simple_read_from_buffer(buf, count, ppos, data, rc); |
| } |
| |
| static const struct file_operations pmbus_debugfs_ops_mfr = { |
| .llseek = noop_llseek, |
| .read = pmbus_debugfs_mfr_read, |
| .write = NULL, |
| .open = simple_open, |
| }; |
| |
| static void pmbus_remove_debugfs(void *data) |
| { |
| struct dentry *entry = data; |
| |
| debugfs_remove_recursive(entry); |
| } |
| |
| static int pmbus_init_debugfs(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| int i, idx = 0; |
| char name[PMBUS_NAME_SIZE]; |
| struct pmbus_debugfs_entry *entries; |
| |
| if (!pmbus_debugfs_dir) |
| return -ENODEV; |
| |
| /* |
| * Create the debugfs directory for this device. Use the hwmon device |
| * name to avoid conflicts (hwmon numbers are globally unique). |
| */ |
| data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev), |
| pmbus_debugfs_dir); |
| if (IS_ERR_OR_NULL(data->debugfs)) { |
| data->debugfs = NULL; |
| return -ENODEV; |
| } |
| |
| /* |
| * Allocate the max possible entries we need. |
| * 6 entries device-specific |
| * 10 entries page-specific |
| */ |
| entries = devm_kcalloc(data->dev, |
| 6 + data->info->pages * 10, sizeof(*entries), |
| GFP_KERNEL); |
| if (!entries) |
| return -ENOMEM; |
| |
| /* |
| * Add device-specific entries. |
| * Please note that the PMBUS standard allows all registers to be |
| * page-specific. |
| * To reduce the number of debugfs entries for devices with many pages |
| * assume that values of the following registers are the same for all |
| * pages and report values only for page 0. |
| */ |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_ID)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_ID; |
| debugfs_create_file("mfr_id", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_MODEL)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_MODEL; |
| debugfs_create_file("mfr_model", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_REVISION)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_REVISION; |
| debugfs_create_file("mfr_revision", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_LOCATION)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_LOCATION; |
| debugfs_create_file("mfr_location", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_DATE)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_DATE; |
| debugfs_create_file("mfr_date", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| if (pmbus_check_block_register(client, 0, PMBUS_MFR_SERIAL)) { |
| entries[idx].client = client; |
| entries[idx].page = 0; |
| entries[idx].reg = PMBUS_MFR_SERIAL; |
| debugfs_create_file("mfr_serial", 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_mfr); |
| } |
| |
| /* Add page specific entries */ |
| for (i = 0; i < data->info->pages; ++i) { |
| /* Check accessibility of status register if it's not page 0 */ |
| if (!i || pmbus_check_status_register(client, i)) { |
| /* No need to set reg as we have special read op. */ |
| entries[idx].client = client; |
| entries[idx].page = i; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops_status); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_VOUT) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_VOUT; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_vout", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_IOUT) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_IOUT; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_iout", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_INPUT) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_INPUT; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_input", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_TEMP) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_TEMPERATURE; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_temp", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (pmbus_check_byte_register(client, i, PMBUS_STATUS_CML)) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_CML; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_cml", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (pmbus_check_byte_register(client, i, PMBUS_STATUS_OTHER)) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_OTHER; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_other", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (pmbus_check_byte_register(client, i, |
| PMBUS_STATUS_MFR_SPECIFIC)) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_MFR_SPECIFIC; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_mfr", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN12) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_FAN_12; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan12", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| |
| if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN34) { |
| entries[idx].client = client; |
| entries[idx].page = i; |
| entries[idx].reg = PMBUS_STATUS_FAN_34; |
| scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan34", i); |
| debugfs_create_file(name, 0444, data->debugfs, |
| &entries[idx++], |
| &pmbus_debugfs_ops); |
| } |
| } |
| |
| return devm_add_action_or_reset(data->dev, |
| pmbus_remove_debugfs, data->debugfs); |
| } |
| #else |
| static int pmbus_init_debugfs(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| return 0; |
| } |
| #endif /* IS_ENABLED(CONFIG_DEBUG_FS) */ |
| |
| int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info) |
| { |
| struct device *dev = &client->dev; |
| const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
| struct pmbus_data *data; |
| size_t groups_num = 0; |
| int ret; |
| int i; |
| char *name; |
| |
| if (!info) |
| return -ENODEV; |
| |
| if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE |
| | I2C_FUNC_SMBUS_BYTE_DATA |
| | I2C_FUNC_SMBUS_WORD_DATA)) |
| return -ENODEV; |
| |
| data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| if (info->groups) |
| while (info->groups[groups_num]) |
| groups_num++; |
| |
| data->groups = devm_kcalloc(dev, groups_num + 2, sizeof(void *), |
| GFP_KERNEL); |
| if (!data->groups) |
| return -ENOMEM; |
| |
| i2c_set_clientdata(client, data); |
| mutex_init(&data->update_lock); |
| data->dev = dev; |
| |
| if (pdata) |
| data->flags = pdata->flags; |
| data->info = info; |
| data->currpage = -1; |
| data->currphase = -1; |
| |
| for (i = 0; i < ARRAY_SIZE(data->vout_low); i++) { |
| data->vout_low[i] = -1; |
| data->vout_high[i] = -1; |
| } |
| |
| ret = pmbus_init_common(client, data, info); |
| if (ret < 0) |
| return ret; |
| |
| ret = pmbus_find_attributes(client, data); |
| if (ret) |
| return ret; |
| |
| /* |
| * If there are no attributes, something is wrong. |
| * Bail out instead of trying to register nothing. |
| */ |
| if (!data->num_attributes) { |
| dev_err(dev, "No attributes found\n"); |
| return -ENODEV; |
| } |
| |
| name = devm_kstrdup(dev, client->name, GFP_KERNEL); |
| if (!name) |
| return -ENOMEM; |
| strreplace(name, '-', '_'); |
| |
| data->groups[0] = &data->group; |
| memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num); |
| data->hwmon_dev = devm_hwmon_device_register_with_groups(dev, |
| name, data, data->groups); |
| if (IS_ERR(data->hwmon_dev)) { |
| dev_err(dev, "Failed to register hwmon device\n"); |
| return PTR_ERR(data->hwmon_dev); |
| } |
| |
| ret = pmbus_regulator_register(data); |
| if (ret) |
| return ret; |
| |
| ret = pmbus_init_debugfs(client, data); |
| if (ret) |
| dev_warn(dev, "Failed to register debugfs\n"); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_do_probe, PMBUS); |
| |
| struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| return data->debugfs; |
| } |
| EXPORT_SYMBOL_NS_GPL(pmbus_get_debugfs_dir, PMBUS); |
| |
| static int __init pmbus_core_init(void) |
| { |
| pmbus_debugfs_dir = debugfs_create_dir("pmbus", NULL); |
| if (IS_ERR(pmbus_debugfs_dir)) |
| pmbus_debugfs_dir = NULL; |
| |
| return 0; |
| } |
| |
| static void __exit pmbus_core_exit(void) |
| { |
| debugfs_remove_recursive(pmbus_debugfs_dir); |
| } |
| |
| module_init(pmbus_core_init); |
| module_exit(pmbus_core_exit); |
| |
| MODULE_AUTHOR("Guenter Roeck"); |
| MODULE_DESCRIPTION("PMBus core driver"); |
| MODULE_LICENSE("GPL"); |