| /* |
| * Hardware monitoring driver for PMBus devices |
| * |
| * Copyright (c) 2010, 2011 Ericsson AB. |
| * Copyright (c) 2012 Guenter Roeck |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/kernel.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/jiffies.h> |
| #include <linux/i2c/pmbus.h> |
| #include "pmbus.h" |
| |
| /* |
| * Number of additional attribute pointers to allocate |
| * with each call to krealloc |
| */ |
| #define PMBUS_ATTR_ALLOC_SIZE 32 |
| |
| /* |
| * Index into status register array, per status register group |
| */ |
| #define PB_STATUS_BASE 0 |
| #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) |
| #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) |
| #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) |
| #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) |
| #define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) |
| #define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES) |
| #define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1) |
| |
| #define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1) |
| |
| #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 */ |
| u16 reg; /* register */ |
| enum pmbus_sensor_classes class; /* sensor class */ |
| bool update; /* runtime sensor update needed */ |
| 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) |
| |
| struct pmbus_data { |
| struct device *dev; |
| struct device *hwmon_dev; |
| |
| u32 flags; /* from platform data */ |
| |
| int exponent; /* 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[2]; |
| |
| struct pmbus_sensor *sensors; |
| |
| struct mutex update_lock; |
| bool valid; |
| unsigned long last_updated; /* in jiffies */ |
| |
| /* |
| * A single status register covers multiple attributes, |
| * so we keep them all together. |
| */ |
| u8 status[PB_NUM_STATUS_REG]; |
| u8 status_register; |
| |
| u8 currpage; |
| }; |
| |
| void pmbus_clear_cache(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| |
| data->valid = false; |
| } |
| EXPORT_SYMBOL_GPL(pmbus_clear_cache); |
| |
| int pmbus_set_page(struct i2c_client *client, u8 page) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int rv = 0; |
| int newpage; |
| |
| if (page != data->currpage) { |
| rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); |
| newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); |
| if (newpage != page) |
| rv = -EIO; |
| else |
| data->currpage = page; |
| } |
| return rv; |
| } |
| EXPORT_SYMBOL_GPL(pmbus_set_page); |
| |
| int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| { |
| int rv; |
| |
| if (page >= 0) { |
| rv = pmbus_set_page(client, page); |
| if (rv < 0) |
| return rv; |
| } |
| |
| return i2c_smbus_write_byte(client, value); |
| } |
| EXPORT_SYMBOL_GPL(pmbus_write_byte); |
| |
| /* |
| * _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, u8 page, u8 reg, u16 word) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_write_word_data(client, reg, word); |
| } |
| EXPORT_SYMBOL_GPL(pmbus_write_word_data); |
| |
| /* |
| * _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 -ENXIO; |
| return pmbus_write_word_data(client, page, reg, word); |
| } |
| |
| int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) |
| { |
| int rv; |
| |
| rv = pmbus_set_page(client, page); |
| if (rv < 0) |
| return rv; |
| |
| return i2c_smbus_read_word_data(client, reg); |
| } |
| EXPORT_SYMBOL_GPL(pmbus_read_word_data); |
| |
| /* |
| * _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 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, reg); |
| if (status != -ENODATA) |
| return status; |
| } |
| if (reg >= PMBUS_VIRT_BASE) |
| return -ENXIO; |
| return pmbus_read_word_data(client, page, reg); |
| } |
| |
| int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) |
| { |
| int rv; |
| |
| if (page >= 0) { |
| rv = pmbus_set_page(client, page); |
| if (rv < 0) |
| return rv; |
| } |
| |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| EXPORT_SYMBOL_GPL(pmbus_read_byte_data); |
| |
| /* |
| * _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); |
| } |
| |
| 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_GPL(pmbus_clear_faults); |
| |
| static int pmbus_check_status_cml(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| int status, status2; |
| |
| status = _pmbus_read_byte_data(client, -1, data->status_register); |
| 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); |
| pmbus_clear_fault_page(client, -1); |
| return rv >= 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_GPL(pmbus_check_byte_register); |
| |
| 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_GPL(pmbus_check_word_register); |
| |
| 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_GPL(pmbus_get_driver_info); |
| |
| static struct _pmbus_status { |
| u32 func; |
| u16 base; |
| u16 reg; |
| } pmbus_status[] = { |
| { PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT }, |
| { PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT }, |
| { PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE, |
| PMBUS_STATUS_TEMPERATURE }, |
| { PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 }, |
| { PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 }, |
| }; |
| |
| static struct pmbus_data *pmbus_update_device(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev->parent); |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| const struct pmbus_driver_info *info = data->info; |
| struct pmbus_sensor *sensor; |
| |
| mutex_lock(&data->update_lock); |
| if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
| int i, j; |
| |
| for (i = 0; i < info->pages; i++) { |
| data->status[PB_STATUS_BASE + i] |
| = _pmbus_read_byte_data(client, i, |
| data->status_register); |
| for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) { |
| struct _pmbus_status *s = &pmbus_status[j]; |
| |
| if (!(info->func[i] & s->func)) |
| continue; |
| data->status[s->base + i] |
| = _pmbus_read_byte_data(client, i, |
| s->reg); |
| } |
| } |
| |
| if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) |
| data->status[PB_STATUS_INPUT_BASE] |
| = _pmbus_read_byte_data(client, 0, |
| PMBUS_STATUS_INPUT); |
| |
| if (info->func[0] & PMBUS_HAVE_STATUS_VMON) |
| data->status[PB_STATUS_VMON_BASE] |
| = _pmbus_read_byte_data(client, 0, |
| PMBUS_VIRT_STATUS_VMON); |
| |
| for (sensor = data->sensors; sensor; sensor = sensor->next) { |
| if (!data->valid || sensor->update) |
| sensor->data |
| = _pmbus_read_word_data(client, |
| sensor->page, |
| sensor->reg); |
| } |
| pmbus_clear_faults(client); |
| data->last_updated = jiffies; |
| data->valid = 1; |
| } |
| mutex_unlock(&data->update_lock); |
| return data; |
| } |
| |
| /* |
| * Convert linear sensor values to milli- or micro-units |
| * depending on sensor type. |
| */ |
| static long pmbus_reg2data_linear(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| s16 exponent; |
| s32 mantissa; |
| long val; |
| |
| if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
| exponent = data->exponent; |
| 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 * 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; |
| |
| return val; |
| } |
| |
| /* |
| * Convert direct sensor values to milli- or micro-units |
| * depending on sensor type. |
| */ |
| static long pmbus_reg2data_direct(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| long val = (s16) sensor->data; |
| long m, b, 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) { |
| 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_ROUND_CLOSEST(val, 10); |
| R++; |
| } |
| |
| return (val - b) / m; |
| } |
| |
| /* |
| * Convert VID sensor values to milli- or micro-units |
| * depending on sensor type. |
| * We currently only support VR11. |
| */ |
| static long pmbus_reg2data_vid(struct pmbus_data *data, |
| struct pmbus_sensor *sensor) |
| { |
| long val = sensor->data; |
| |
| if (val < 0x02 || val > 0xb2) |
| return 0; |
| return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); |
| } |
| |
| static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
| { |
| long val; |
| |
| 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 linear: |
| default: |
| val = pmbus_reg2data_linear(data, sensor); |
| break; |
| } |
| return val; |
| } |
| |
| #define MAX_MANTISSA (1023 * 1000) |
| #define MIN_MANTISSA (511 * 1000) |
| |
| static u16 pmbus_data2reg_linear(struct pmbus_data *data, |
| enum pmbus_sensor_classes class, long val) |
| { |
| s16 exponent = 0, mantissa; |
| bool negative = false; |
| |
| /* simple case */ |
| if (val == 0) |
| return 0; |
| |
| if (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 < 0) |
| val <<= -data->exponent; |
| else |
| val >>= data->exponent; |
| val = DIV_ROUND_CLOSEST(val, 1000); |
| return val & 0xffff; |
| } |
| |
| if (val < 0) { |
| negative = true; |
| val = -val; |
| } |
| |
| /* Power is in uW. Convert to mW before converting. */ |
| if (class == PSC_POWER) |
| val = DIV_ROUND_CLOSEST(val, 1000L); |
| |
| /* |
| * For simplicity, convert fan data to milli-units |
| * before calculating the exponent. |
| */ |
| if (class == PSC_FAN) |
| val = val * 1000; |
| |
| /* Reduce large mantissa until it fits into 10 bit */ |
| while (val >= MAX_MANTISSA && exponent < 15) { |
| exponent++; |
| val >>= 1; |
| } |
| /* Increase small mantissa to improve precision */ |
| while (val < MIN_MANTISSA && exponent > -15) { |
| exponent--; |
| val <<= 1; |
| } |
| |
| /* Convert mantissa from milli-units to units */ |
| mantissa = DIV_ROUND_CLOSEST(val, 1000); |
| |
| /* Ensure that resulting number is within range */ |
| if (mantissa > 0x3ff) |
| mantissa = 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, |
| enum pmbus_sensor_classes class, long val) |
| { |
| long m, b, R; |
| |
| m = data->info->m[class]; |
| b = data->info->b[class]; |
| R = data->info->R[class]; |
| |
| /* Power is in uW. Adjust R and b. */ |
| if (class == PSC_POWER) { |
| R -= 3; |
| b *= 1000; |
| } |
| |
| /* Calculate Y = (m * X + b) * 10^R */ |
| if (class != PSC_FAN) { |
| 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_ROUND_CLOSEST(val, 10); |
| R++; |
| } |
| |
| return val; |
| } |
| |
| static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
| enum pmbus_sensor_classes class, long val) |
| { |
| val = clamp_val(val, 500, 1600); |
| |
| return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); |
| } |
| |
| static u16 pmbus_data2reg(struct pmbus_data *data, |
| enum pmbus_sensor_classes class, long val) |
| { |
| u16 regval; |
| |
| switch (data->info->format[class]) { |
| case direct: |
| regval = pmbus_data2reg_direct(data, class, val); |
| break; |
| case vid: |
| regval = pmbus_data2reg_vid(data, class, val); |
| break; |
| case linear: |
| default: |
| regval = pmbus_data2reg_linear(data, class, 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 pmbus_data *data, struct pmbus_boolean *b, |
| int index) |
| { |
| struct pmbus_sensor *s1 = b->s1; |
| struct pmbus_sensor *s2 = b->s2; |
| u16 reg = (index >> 8) & 0xffff; |
| u8 mask = index & 0xff; |
| int ret, status; |
| u8 regval; |
| |
| status = data->status[reg]; |
| if (status < 0) |
| return status; |
| |
| regval = status & mask; |
| if (!s1 && !s2) { |
| ret = !!regval; |
| } else if (!s1 || !s2) { |
| WARN(1, "Bad boolean descriptor %p: s1=%p, s2=%p\n", b, s1, s2); |
| return 0; |
| } else { |
| long v1, v2; |
| |
| if (s1->data < 0) |
| return s1->data; |
| if (s2->data < 0) |
| return s2->data; |
| |
| v1 = pmbus_reg2data(data, s1); |
| v2 = pmbus_reg2data(data, s2); |
| ret = !!(regval && v1 >= v2); |
| } |
| 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 pmbus_data *data = pmbus_update_device(dev); |
| int val; |
| |
| val = pmbus_get_boolean(data, boolean, attr->index); |
| if (val < 0) |
| return val; |
| return snprintf(buf, PAGE_SIZE, "%d\n", val); |
| } |
| |
| static ssize_t pmbus_show_sensor(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct pmbus_data *data = pmbus_update_device(dev); |
| struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
| |
| if (sensor->data < 0) |
| return sensor->data; |
| |
| return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); |
| } |
| |
| 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; |
| long val = 0; |
| int ret; |
| u16 regval; |
| |
| if (kstrtol(buf, 10, &val) < 0) |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| regval = pmbus_data2reg(data, sensor->class, val); |
| ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
| if (ret < 0) |
| rv = ret; |
| else |
| sensor->data = regval; |
| 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 snprintf(buf, PAGE_SIZE, "%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 = krealloc(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, |
| u16 reg, u8 mask) |
| { |
| struct pmbus_boolean *boolean; |
| struct sensor_device_attribute *a; |
| |
| 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, S_IRUGO, pmbus_show_boolean, NULL, |
| (reg << 8) | mask); |
| |
| return pmbus_add_attribute(data, &a->dev_attr.attr); |
| } |
| |
| static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, |
| const char *name, const char *type, |
| int seq, int page, int reg, |
| enum pmbus_sensor_classes class, |
| bool update, bool readonly) |
| { |
| struct pmbus_sensor *sensor; |
| struct device_attribute *a; |
| |
| sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL); |
| if (!sensor) |
| return NULL; |
| a = &sensor->attribute; |
| |
| snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", |
| name, seq, type); |
| sensor->page = page; |
| sensor->reg = reg; |
| sensor->class = class; |
| sensor->update = update; |
| pmbus_dev_attr_init(a, sensor->name, |
| readonly ? S_IRUGO : S_IRUGO | S_IWUSR, |
| pmbus_show_sensor, pmbus_set_sensor); |
| |
| if (pmbus_add_attribute(data, &a->attr)) |
| return NULL; |
| |
| sensor->next = data->sensors; |
| data->sensors = sensor; |
| |
| return sensor; |
| } |
| |
| static int pmbus_add_label(struct pmbus_data *data, |
| const char *name, int seq, |
| const char *lstring, int index) |
| { |
| 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) |
| strncpy(label->label, lstring, sizeof(label->label) - 1); |
| else |
| snprintf(label->label, sizeof(label->label), "%s%d", lstring, |
| index); |
| |
| pmbus_dev_attr_init(a, label->name, S_IRUGO, 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 */ |
| u8 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 sbase; /* status base 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, l->reg, attr->class, |
| attr->update || l->update, |
| false); |
| 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, |
| attr->sbase + page, 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, |
| const struct pmbus_sensor_attr *attr) |
| { |
| struct pmbus_sensor *base; |
| int ret; |
| |
| if (attr->label) { |
| ret = pmbus_add_label(data, name, index, attr->label, |
| attr->paged ? page + 1 : 0); |
| if (ret) |
| return ret; |
| } |
| base = pmbus_add_sensor(data, name, "input", index, page, attr->reg, |
| attr->class, true, true); |
| if (!base) |
| return -ENOMEM; |
| if (attr->sfunc) { |
| 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 for this page is accessible. |
| */ |
| if (!ret && attr->gbit && |
| pmbus_check_byte_register(client, page, |
| data->status_register)) { |
| ret = pmbus_add_boolean(data, name, "alarm", index, |
| NULL, NULL, |
| PB_STATUS_BASE + page, |
| attr->gbit); |
| if (ret) |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| 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; |
| |
| pages = attrs->paged ? info->pages : 1; |
| for (page = 0; page < pages; page++) { |
| if (!(info->func[page] & attrs->func)) |
| continue; |
| ret = pmbus_add_sensor_attrs_one(client, data, info, |
| name, index, page, |
| attrs); |
| 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, |
| }, { |
| .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", |
| }, |
| }; |
| |
| 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", |
| } |
| }; |
| |
| 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, |
| .sbase = PB_STATUS_INPUT_BASE, |
| .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, |
| .sbase = PB_STATUS_VMON_BASE, |
| .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, |
| .sbase = PB_STATUS_VOUT_BASE, |
| .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", |
| } |
| }; |
| |
| 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", |
| } |
| }; |
| |
| 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, |
| .sbase = PB_STATUS_INPUT_BASE, |
| .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, |
| .sbase = PB_STATUS_IOUT_BASE, |
| .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_MAX, |
| .update = true, |
| .attr = "input_highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_PIN_HISTORY, |
| .attr = "reset_history", |
| } |
| }; |
| |
| 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_MAX, |
| .update = true, |
| .attr = "input_highest", |
| }, { |
| .reg = PMBUS_VIRT_RESET_POUT_HISTORY, |
| .attr = "reset_history", |
| } |
| }; |
| |
| 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, |
| .sbase = PB_STATUS_INPUT_BASE, |
| .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, |
| .sbase = PB_STATUS_IOUT_BASE, |
| .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", |
| } |
| }; |
| |
| 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", |
| } |
| }; |
| |
| 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, |
| } |
| }; |
| |
| 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, |
| .sbase = PB_STATUS_TEMP_BASE, |
| .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, |
| .sbase = PB_STATUS_TEMP_BASE, |
| .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, |
| .sbase = PB_STATUS_TEMP_BASE, |
| .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_config_registers[] = { |
| PMBUS_FAN_CONFIG_12, |
| PMBUS_FAN_CONFIG_12, |
| PMBUS_FAN_CONFIG_34, |
| PMBUS_FAN_CONFIG_34 |
| }; |
| |
| 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 */ |
| 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, pmbus_fan_registers[f], |
| PSC_FAN, true, true) == NULL) |
| return -ENOMEM; |
| |
| /* |
| * 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 base; |
| |
| if (f > 1) /* fan 3, 4 */ |
| base = PB_STATUS_FAN34_BASE + page; |
| else |
| base = PB_STATUS_FAN_BASE + page; |
| ret = pmbus_add_boolean(data, "fan", |
| "alarm", index, NULL, NULL, base, |
| PB_FAN_FAN1_WARNING >> (f & 1)); |
| if (ret) |
| return ret; |
| ret = pmbus_add_boolean(data, "fan", |
| "fault", index, NULL, NULL, base, |
| PB_FAN_FAN1_FAULT >> (f & 1)); |
| if (ret) |
| return ret; |
| } |
| index++; |
| } |
| } |
| 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); |
| return ret; |
| } |
| |
| /* |
| * Identify chip parameters. |
| * This function is called for all chips. |
| */ |
| static int pmbus_identify_common(struct i2c_client *client, |
| struct pmbus_data *data) |
| { |
| int vout_mode = -1; |
| |
| if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) |
| vout_mode = _pmbus_read_byte_data(client, 0, 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 = ((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; |
| default: |
| return -ENODEV; |
| } |
| } |
| |
| pmbus_clear_fault_page(client, 0); |
| return 0; |
| } |
| |
| static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, |
| struct pmbus_driver_info *info) |
| { |
| struct device *dev = &client->dev; |
| int ret; |
| |
| /* |
| * Some PMBus chips don't support PMBUS_STATUS_BYTE, so try |
| * to use PMBUS_STATUS_WORD instead if that is the case. |
| * Bail out if both registers are not supported. |
| */ |
| data->status_register = PMBUS_STATUS_BYTE; |
| ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE); |
| if (ret < 0 || ret == 0xff) { |
| data->status_register = PMBUS_STATUS_WORD; |
| ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD); |
| if (ret < 0 || ret == 0xffff) { |
| dev_err(dev, "PMBus status register not found\n"); |
| return -ENODEV; |
| } |
| } |
| |
| pmbus_clear_faults(client); |
| |
| 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; |
| } |
| |
| ret = pmbus_identify_common(client, data); |
| if (ret < 0) { |
| dev_err(dev, "Failed to identify chip capabilities\n"); |
| return ret; |
| } |
| return 0; |
| } |
| |
| int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, |
| struct pmbus_driver_info *info) |
| { |
| struct device *dev = &client->dev; |
| const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
| struct pmbus_data *data; |
| int ret; |
| |
| 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; |
| |
| i2c_set_clientdata(client, data); |
| mutex_init(&data->update_lock); |
| data->dev = dev; |
| |
| if (pdata) |
| data->flags = pdata->flags; |
| data->info = info; |
| |
| ret = pmbus_init_common(client, data, info); |
| if (ret < 0) |
| return ret; |
| |
| ret = pmbus_find_attributes(client, data); |
| if (ret) |
| goto out_kfree; |
| |
| /* |
| * 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"); |
| ret = -ENODEV; |
| goto out_kfree; |
| } |
| |
| data->groups[0] = &data->group; |
| data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name, |
| data, data->groups); |
| if (IS_ERR(data->hwmon_dev)) { |
| ret = PTR_ERR(data->hwmon_dev); |
| dev_err(dev, "Failed to register hwmon device\n"); |
| goto out_kfree; |
| } |
| return 0; |
| |
| out_kfree: |
| kfree(data->group.attrs); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(pmbus_do_probe); |
| |
| int pmbus_do_remove(struct i2c_client *client) |
| { |
| struct pmbus_data *data = i2c_get_clientdata(client); |
| hwmon_device_unregister(data->hwmon_dev); |
| kfree(data->group.attrs); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(pmbus_do_remove); |
| |
| MODULE_AUTHOR("Guenter Roeck"); |
| MODULE_DESCRIPTION("PMBus core driver"); |
| MODULE_LICENSE("GPL"); |