6586b14c7b
Fan control implementation tends to be device specific, so start using the device specific function call to read fan configuration registers. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
1572 lines
40 KiB
C
1572 lines
40 KiB
C
/*
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* Hardware monitoring driver for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/delay.h>
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#include <linux/i2c/pmbus.h>
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#include "pmbus.h"
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/*
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* Constants needed to determine number of sensors, booleans, and labels.
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*/
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#define PMBUS_MAX_INPUT_SENSORS 11 /* 6*volt, 3*curr, 2*power */
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#define PMBUS_VOUT_SENSORS_PER_PAGE 5 /* input, min, max, lcrit,
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crit */
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#define PMBUS_IOUT_SENSORS_PER_PAGE 4 /* input, min, max, crit */
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#define PMBUS_POUT_SENSORS_PER_PAGE 4 /* input, cap, max, crit */
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#define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */
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#define PMBUS_MAX_SENSORS_PER_TEMP 5 /* input, min, max, lcrit,
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crit */
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#define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm,
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lcrit_alarm, crit_alarm;
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c: alarm, crit_alarm;
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p: crit_alarm */
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#define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm,
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lcrit_alarm, crit_alarm */
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#define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm,
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crit_alarm */
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#define PMBUS_POUT_BOOLEANS_PER_PAGE 2 /* alarm, crit_alarm */
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#define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */
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#define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm,
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lcrit_alarm, crit_alarm */
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#define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
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/*
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* status, status_vout, status_iout, status_fans, status_fan34, and status_temp
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* are paged. status_input is unpaged.
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*/
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#define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
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/*
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* Index into status register array, per status register group
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*/
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#define PB_STATUS_BASE 0
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#define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
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#define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
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#define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
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#define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
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#define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
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#define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
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struct pmbus_sensor {
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char name[I2C_NAME_SIZE]; /* sysfs sensor name */
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struct sensor_device_attribute attribute;
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u8 page; /* page number */
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u8 reg; /* register */
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enum pmbus_sensor_classes class; /* sensor class */
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bool update; /* runtime sensor update needed */
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int data; /* Sensor data.
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Negative if there was a read error */
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};
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struct pmbus_boolean {
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char name[I2C_NAME_SIZE]; /* sysfs boolean name */
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struct sensor_device_attribute attribute;
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};
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struct pmbus_label {
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char name[I2C_NAME_SIZE]; /* sysfs label name */
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struct sensor_device_attribute attribute;
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char label[I2C_NAME_SIZE]; /* label */
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};
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struct pmbus_data {
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struct device *hwmon_dev;
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u32 flags; /* from platform data */
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int exponent; /* linear mode: exponent for output voltages */
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const struct pmbus_driver_info *info;
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int max_attributes;
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int num_attributes;
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struct attribute **attributes;
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struct attribute_group group;
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/*
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* Sensors cover both sensor and limit registers.
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*/
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int max_sensors;
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int num_sensors;
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struct pmbus_sensor *sensors;
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/*
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* Booleans are used for alarms.
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* Values are determined from status registers.
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*/
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int max_booleans;
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int num_booleans;
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struct pmbus_boolean *booleans;
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/*
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* Labels are used to map generic names (e.g., "in1")
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* to PMBus specific names (e.g., "vin" or "vout1").
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*/
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int max_labels;
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int num_labels;
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struct pmbus_label *labels;
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struct mutex update_lock;
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bool valid;
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unsigned long last_updated; /* in jiffies */
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/*
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* A single status register covers multiple attributes,
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* so we keep them all together.
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*/
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u8 status[PB_NUM_STATUS_REG];
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u8 currpage;
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};
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int pmbus_set_page(struct i2c_client *client, u8 page)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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int rv = 0;
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int newpage;
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if (page != data->currpage) {
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rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
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newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
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if (newpage != page)
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rv = -EINVAL;
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else
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data->currpage = page;
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}
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return rv;
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}
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EXPORT_SYMBOL_GPL(pmbus_set_page);
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static int pmbus_write_byte(struct i2c_client *client, u8 page, u8 value)
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{
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int rv;
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rv = pmbus_set_page(client, page);
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if (rv < 0)
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return rv;
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return i2c_smbus_write_byte(client, value);
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}
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static int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg,
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u16 word)
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{
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int rv;
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rv = pmbus_set_page(client, page);
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if (rv < 0)
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return rv;
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return i2c_smbus_write_word_data(client, reg, word);
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}
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int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg)
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{
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int rv;
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rv = pmbus_set_page(client, page);
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if (rv < 0)
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return rv;
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return i2c_smbus_read_word_data(client, reg);
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}
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EXPORT_SYMBOL_GPL(pmbus_read_word_data);
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static int pmbus_read_byte_data(struct i2c_client *client, u8 page, u8 reg)
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{
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int rv;
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rv = pmbus_set_page(client, page);
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if (rv < 0)
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return rv;
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return i2c_smbus_read_byte_data(client, reg);
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}
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static void pmbus_clear_fault_page(struct i2c_client *client, int page)
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{
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pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
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}
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void pmbus_clear_faults(struct i2c_client *client)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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int i;
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for (i = 0; i < data->info->pages; i++)
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pmbus_clear_fault_page(client, i);
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}
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EXPORT_SYMBOL_GPL(pmbus_clear_faults);
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static int pmbus_check_status_cml(struct i2c_client *client, int page)
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{
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int status, status2;
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status = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE);
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if (status < 0 || (status & PB_STATUS_CML)) {
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status2 = pmbus_read_byte_data(client, page, PMBUS_STATUS_CML);
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if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
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return -EINVAL;
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}
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return 0;
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}
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bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
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{
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int rv;
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struct pmbus_data *data = i2c_get_clientdata(client);
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rv = pmbus_read_byte_data(client, page, reg);
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if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
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rv = pmbus_check_status_cml(client, page);
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pmbus_clear_fault_page(client, page);
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return rv >= 0;
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}
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EXPORT_SYMBOL_GPL(pmbus_check_byte_register);
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bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
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{
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int rv;
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struct pmbus_data *data = i2c_get_clientdata(client);
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rv = pmbus_read_word_data(client, page, reg);
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if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
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rv = pmbus_check_status_cml(client, page);
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pmbus_clear_fault_page(client, page);
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return rv >= 0;
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}
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EXPORT_SYMBOL_GPL(pmbus_check_word_register);
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const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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return data->info;
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}
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EXPORT_SYMBOL_GPL(pmbus_get_driver_info);
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/*
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* _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
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* a device specific mapping funcion exists and calls it if necessary.
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*/
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static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->read_byte_data) {
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status = info->read_byte_data(client, page, reg);
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if (status != -ENODATA)
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return status;
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}
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return pmbus_read_byte_data(client, page, reg);
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}
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static struct pmbus_data *pmbus_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
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int i;
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for (i = 0; i < info->pages; i++)
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data->status[PB_STATUS_BASE + i]
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= pmbus_read_byte_data(client, i,
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PMBUS_STATUS_BYTE);
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for (i = 0; i < info->pages; i++) {
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if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT))
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continue;
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data->status[PB_STATUS_VOUT_BASE + i]
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= _pmbus_read_byte_data(client, i, PMBUS_STATUS_VOUT);
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}
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for (i = 0; i < info->pages; i++) {
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if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT))
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continue;
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data->status[PB_STATUS_IOUT_BASE + i]
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= _pmbus_read_byte_data(client, i, PMBUS_STATUS_IOUT);
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}
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for (i = 0; i < info->pages; i++) {
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if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP))
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continue;
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data->status[PB_STATUS_TEMP_BASE + i]
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= _pmbus_read_byte_data(client, i,
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PMBUS_STATUS_TEMPERATURE);
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}
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for (i = 0; i < info->pages; i++) {
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if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12))
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continue;
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data->status[PB_STATUS_FAN_BASE + i]
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= _pmbus_read_byte_data(client, i,
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PMBUS_STATUS_FAN_12);
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}
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for (i = 0; i < info->pages; i++) {
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if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34))
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continue;
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data->status[PB_STATUS_FAN34_BASE + i]
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= _pmbus_read_byte_data(client, i,
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PMBUS_STATUS_FAN_34);
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}
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if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
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data->status[PB_STATUS_INPUT_BASE]
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= _pmbus_read_byte_data(client, 0,
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PMBUS_STATUS_INPUT);
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for (i = 0; i < data->num_sensors; i++) {
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struct pmbus_sensor *sensor = &data->sensors[i];
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if (!data->valid || sensor->update)
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sensor->data
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= pmbus_read_word_data(client, sensor->page,
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sensor->reg);
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}
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pmbus_clear_faults(client);
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*
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* Convert linear sensor values to milli- or micro-units
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* depending on sensor type.
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*/
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static int pmbus_reg2data_linear(struct pmbus_data *data,
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struct pmbus_sensor *sensor)
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{
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s16 exponent;
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s32 mantissa;
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long val;
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if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */
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exponent = data->exponent;
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mantissa = (u16) sensor->data;
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} else { /* LINEAR11 */
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exponent = (sensor->data >> 11) & 0x001f;
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mantissa = sensor->data & 0x07ff;
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if (exponent > 0x0f)
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exponent |= 0xffe0; /* sign extend exponent */
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if (mantissa > 0x03ff)
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mantissa |= 0xfffff800; /* sign extend mantissa */
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}
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val = mantissa;
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/* scale result to milli-units for all sensors except fans */
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if (sensor->class != PSC_FAN)
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val = val * 1000L;
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/* scale result to micro-units for power sensors */
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if (sensor->class == PSC_POWER)
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val = val * 1000L;
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if (exponent >= 0)
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val <<= exponent;
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else
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val >>= -exponent;
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return (int)val;
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}
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/*
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* Convert direct sensor values to milli- or micro-units
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* depending on sensor type.
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*/
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static int pmbus_reg2data_direct(struct pmbus_data *data,
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struct pmbus_sensor *sensor)
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{
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long val = (s16) sensor->data;
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long m, b, R;
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m = data->info->m[sensor->class];
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b = data->info->b[sensor->class];
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R = data->info->R[sensor->class];
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if (m == 0)
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return 0;
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/* X = 1/m * (Y * 10^-R - b) */
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R = -R;
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/* scale result to milli-units for everything but fans */
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if (sensor->class != PSC_FAN) {
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R += 3;
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b *= 1000;
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}
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/* scale result to micro-units for power sensors */
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if (sensor->class == PSC_POWER) {
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R += 3;
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b *= 1000;
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}
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while (R > 0) {
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val *= 10;
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R--;
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}
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while (R < 0) {
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val = DIV_ROUND_CLOSEST(val, 10);
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R++;
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}
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return (int)((val - b) / m);
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}
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static int pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
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{
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int val;
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if (data->info->direct[sensor->class])
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val = pmbus_reg2data_direct(data, sensor);
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else
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val = pmbus_reg2data_linear(data, sensor);
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return val;
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}
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#define MAX_MANTISSA (1023 * 1000)
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#define MIN_MANTISSA (511 * 1000)
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static u16 pmbus_data2reg_linear(struct pmbus_data *data,
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enum pmbus_sensor_classes class, long val)
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{
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s16 exponent = 0, mantissa;
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bool negative = false;
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/* simple case */
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if (val == 0)
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return 0;
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if (class == PSC_VOLTAGE_OUT) {
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/* LINEAR16 does not support negative voltages */
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if (val < 0)
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return 0;
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/*
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* For a static exponents, we don't have a choice
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* but to adjust the value to it.
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*/
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if (data->exponent < 0)
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val <<= -data->exponent;
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else
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val >>= data->exponent;
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val = DIV_ROUND_CLOSEST(val, 1000);
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return val & 0xffff;
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}
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if (val < 0) {
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negative = true;
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val = -val;
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}
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/* Power is in uW. Convert to mW before converting. */
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if (class == PSC_POWER)
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val = DIV_ROUND_CLOSEST(val, 1000L);
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/*
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* For simplicity, convert fan data to milli-units
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* before calculating the exponent.
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*/
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if (class == PSC_FAN)
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val = val * 1000;
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|
|
/* 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(struct pmbus_data *data,
|
|
enum pmbus_sensor_classes class, long val)
|
|
{
|
|
u16 regval;
|
|
|
|
if (data->info->direct[class])
|
|
regval = pmbus_data2reg_direct(data, class, val);
|
|
else
|
|
regval = pmbus_data2reg_linear(data, class, val);
|
|
|
|
return regval;
|
|
}
|
|
|
|
/*
|
|
* Return boolean calculated from converted data.
|
|
* <index> defines a status register index and mask, and optionally
|
|
* two sensor indexes.
|
|
* The upper half-word references the two sensors,
|
|
* two sensor indices.
|
|
* The upper half-word references the two optional sensors,
|
|
* the lower half word references status register and mask.
|
|
* The function returns true if (status[reg] & mask) is true and,
|
|
* if specified, if v1 >= v2.
|
|
* To determine if an object exceeds upper limits, specify <v, limit>.
|
|
* To determine if an object exceeds lower limits, specify <limit, v>.
|
|
*
|
|
* For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of
|
|
* index are set. s1 and s2 (the sensor index values) are zero in this case.
|
|
* The function returns true if (status[reg] & mask) is true.
|
|
*
|
|
* If the boolean was created with pmbus_add_boolean_cmp(), 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 indices 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, int index, int *val)
|
|
{
|
|
u8 s1 = (index >> 24) & 0xff;
|
|
u8 s2 = (index >> 16) & 0xff;
|
|
u8 reg = (index >> 8) & 0xff;
|
|
u8 mask = index & 0xff;
|
|
int status;
|
|
u8 regval;
|
|
|
|
status = data->status[reg];
|
|
if (status < 0)
|
|
return status;
|
|
|
|
regval = status & mask;
|
|
if (!s1 && !s2)
|
|
*val = !!regval;
|
|
else {
|
|
int v1, v2;
|
|
struct pmbus_sensor *sensor1, *sensor2;
|
|
|
|
sensor1 = &data->sensors[s1];
|
|
if (sensor1->data < 0)
|
|
return sensor1->data;
|
|
sensor2 = &data->sensors[s2];
|
|
if (sensor2->data < 0)
|
|
return sensor2->data;
|
|
|
|
v1 = pmbus_reg2data(data, sensor1);
|
|
v2 = pmbus_reg2data(data, sensor2);
|
|
*val = !!(regval && v1 >= v2);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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_data *data = pmbus_update_device(dev);
|
|
int val;
|
|
int err;
|
|
|
|
err = pmbus_get_boolean(data, attr->index, &val);
|
|
if (err)
|
|
return err;
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t pmbus_show_sensor(struct device *dev,
|
|
struct device_attribute *da, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
|
|
struct pmbus_data *data = pmbus_update_device(dev);
|
|
struct pmbus_sensor *sensor;
|
|
|
|
sensor = &data->sensors[attr->index];
|
|
if (sensor->data < 0)
|
|
return sensor->data;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\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 sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
struct pmbus_sensor *sensor = &data->sensors[attr->index];
|
|
ssize_t rv = count;
|
|
long val = 0;
|
|
int ret;
|
|
u16 regval;
|
|
|
|
if (strict_strtol(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
|
|
data->sensors[attr->index].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 i2c_client *client = to_i2c_client(dev);
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n",
|
|
data->labels[attr->index].label);
|
|
}
|
|
|
|
#define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \
|
|
do { \
|
|
struct sensor_device_attribute *a \
|
|
= &data->_type##s[data->num_##_type##s].attribute; \
|
|
BUG_ON(data->num_attributes >= data->max_attributes); \
|
|
a->dev_attr.attr.name = _name; \
|
|
a->dev_attr.attr.mode = _mode; \
|
|
a->dev_attr.show = _show; \
|
|
a->dev_attr.store = _set; \
|
|
a->index = _idx; \
|
|
data->attributes[data->num_attributes] = &a->dev_attr.attr; \
|
|
data->num_attributes++; \
|
|
} while (0)
|
|
|
|
#define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \
|
|
PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \
|
|
pmbus_show_##_type, NULL)
|
|
|
|
#define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \
|
|
PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \
|
|
pmbus_show_##_type, pmbus_set_##_type)
|
|
|
|
static void pmbus_add_boolean(struct pmbus_data *data,
|
|
const char *name, const char *type, int seq,
|
|
int idx)
|
|
{
|
|
struct pmbus_boolean *boolean;
|
|
|
|
BUG_ON(data->num_booleans >= data->max_booleans);
|
|
|
|
boolean = &data->booleans[data->num_booleans];
|
|
|
|
snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s",
|
|
name, seq, type);
|
|
PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx);
|
|
data->num_booleans++;
|
|
}
|
|
|
|
static void pmbus_add_boolean_reg(struct pmbus_data *data,
|
|
const char *name, const char *type,
|
|
int seq, int reg, int bit)
|
|
{
|
|
pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit);
|
|
}
|
|
|
|
static void pmbus_add_boolean_cmp(struct pmbus_data *data,
|
|
const char *name, const char *type,
|
|
int seq, int i1, int i2, int reg, int mask)
|
|
{
|
|
pmbus_add_boolean(data, name, type, seq,
|
|
(i1 << 24) | (i2 << 16) | (reg << 8) | mask);
|
|
}
|
|
|
|
static void 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;
|
|
|
|
BUG_ON(data->num_sensors >= data->max_sensors);
|
|
|
|
sensor = &data->sensors[data->num_sensors];
|
|
snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s",
|
|
name, seq, type);
|
|
sensor->page = page;
|
|
sensor->reg = reg;
|
|
sensor->class = class;
|
|
sensor->update = update;
|
|
if (readonly)
|
|
PMBUS_ADD_GET_ATTR(data, sensor->name, sensor,
|
|
data->num_sensors);
|
|
else
|
|
PMBUS_ADD_SET_ATTR(data, sensor->name, sensor,
|
|
data->num_sensors);
|
|
data->num_sensors++;
|
|
}
|
|
|
|
static void pmbus_add_label(struct pmbus_data *data,
|
|
const char *name, int seq,
|
|
const char *lstring, int index)
|
|
{
|
|
struct pmbus_label *label;
|
|
|
|
BUG_ON(data->num_labels >= data->max_labels);
|
|
|
|
label = &data->labels[data->num_labels];
|
|
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_ADD_GET_ATTR(data, label->name, label, data->num_labels);
|
|
data->num_labels++;
|
|
}
|
|
|
|
/*
|
|
* Determine maximum number of sensors, booleans, and labels.
|
|
* To keep things simple, only make a rough high estimate.
|
|
*/
|
|
static void pmbus_find_max_attr(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
const struct pmbus_driver_info *info = data->info;
|
|
int page, max_sensors, max_booleans, max_labels;
|
|
|
|
max_sensors = PMBUS_MAX_INPUT_SENSORS;
|
|
max_booleans = PMBUS_MAX_INPUT_BOOLEANS;
|
|
max_labels = PMBUS_MAX_INPUT_LABELS;
|
|
|
|
for (page = 0; page < info->pages; page++) {
|
|
if (info->func[page] & PMBUS_HAVE_VOUT) {
|
|
max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE;
|
|
max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE;
|
|
max_labels++;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_IOUT) {
|
|
max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE;
|
|
max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE;
|
|
max_labels++;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_POUT) {
|
|
max_sensors += PMBUS_POUT_SENSORS_PER_PAGE;
|
|
max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE;
|
|
max_labels++;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_FAN12) {
|
|
max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
|
|
max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_FAN34) {
|
|
max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
|
|
max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_TEMP) {
|
|
max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
|
|
max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_TEMP2) {
|
|
max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
|
|
max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
|
|
}
|
|
if (info->func[page] & PMBUS_HAVE_TEMP3) {
|
|
max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
|
|
max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
|
|
}
|
|
}
|
|
data->max_sensors = max_sensors;
|
|
data->max_booleans = max_booleans;
|
|
data->max_labels = max_labels;
|
|
data->max_attributes = max_sensors + max_booleans + max_labels;
|
|
}
|
|
|
|
/*
|
|
* 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 {
|
|
u8 reg; /* Limit register */
|
|
const char *attr; /* Attribute name */
|
|
const char *alarm; /* Alarm attribute name */
|
|
u32 sbit; /* Alarm attribute status bit */
|
|
};
|
|
|
|
/*
|
|
* The pmbus_sensor_attr structure describes one sensor attribute. This
|
|
* description includes a reference to the associated limit attributes.
|
|
*/
|
|
struct pmbus_sensor_attr {
|
|
u8 reg; /* sensor register */
|
|
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 */
|
|
u32 gbit; /* generic status bit */
|
|
const struct pmbus_limit_attr *limit;/* limit registers */
|
|
int nlimit; /* # of limit registers */
|
|
};
|
|
|
|
/*
|
|
* Add a set of limit attributes and, if supported, the associated
|
|
* alarm attributes.
|
|
*/
|
|
static bool 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,
|
|
int cbase,
|
|
const struct pmbus_sensor_attr *attr)
|
|
{
|
|
const struct pmbus_limit_attr *l = attr->limit;
|
|
int nlimit = attr->nlimit;
|
|
bool have_alarm = false;
|
|
int i, cindex;
|
|
|
|
for (i = 0; i < nlimit; i++) {
|
|
if (pmbus_check_word_register(client, page, l->reg)) {
|
|
cindex = data->num_sensors;
|
|
pmbus_add_sensor(data, name, l->attr, index, page,
|
|
l->reg, attr->class, attr->update,
|
|
false);
|
|
if (info->func[page] & attr->sfunc) {
|
|
if (attr->compare) {
|
|
pmbus_add_boolean_cmp(data, name,
|
|
l->alarm, index,
|
|
cbase, cindex,
|
|
attr->sbase + page, l->sbit);
|
|
} else {
|
|
pmbus_add_boolean_reg(data, name,
|
|
l->alarm, index,
|
|
attr->sbase + page, l->sbit);
|
|
}
|
|
have_alarm = true;
|
|
}
|
|
}
|
|
l++;
|
|
}
|
|
return have_alarm;
|
|
}
|
|
|
|
static void 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)
|
|
{
|
|
bool have_alarm;
|
|
int cbase = data->num_sensors;
|
|
|
|
if (attr->label)
|
|
pmbus_add_label(data, name, index, attr->label,
|
|
attr->paged ? page + 1 : 0);
|
|
pmbus_add_sensor(data, name, "input", index, page, attr->reg,
|
|
attr->class, true, true);
|
|
if (attr->sfunc) {
|
|
have_alarm = pmbus_add_limit_attrs(client, data, info, name,
|
|
index, page, cbase, attr);
|
|
/*
|
|
* Add generic alarm attribute only if there are no individual
|
|
* alarm attributes, and if there is a global alarm bit.
|
|
*/
|
|
if (!have_alarm && attr->gbit)
|
|
pmbus_add_boolean_reg(data, name, "alarm", index,
|
|
PB_STATUS_BASE + page,
|
|
attr->gbit);
|
|
}
|
|
}
|
|
|
|
static void 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;
|
|
|
|
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;
|
|
pmbus_add_sensor_attrs_one(client, data, info, name,
|
|
index, page, attrs);
|
|
index++;
|
|
}
|
|
attrs++;
|
|
}
|
|
}
|
|
|
|
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,
|
|
},
|
|
};
|
|
|
|
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,
|
|
}
|
|
};
|
|
|
|
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_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,
|
|
}
|
|
};
|
|
|
|
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,
|
|
}
|
|
};
|
|
|
|
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,
|
|
}
|
|
};
|
|
|
|
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,
|
|
}
|
|
};
|
|
|
|
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,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_TEMP_UT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_UT_FAULT_LIMIT,
|
|
.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_attrs,
|
|
.nlimit = ARRAY_SIZE(temp_limit_attrs),
|
|
}, {
|
|
.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_attrs,
|
|
.nlimit = ARRAY_SIZE(temp_limit_attrs),
|
|
}
|
|
};
|
|
|
|
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 void 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;
|
|
|
|
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;
|
|
|
|
pmbus_add_sensor(data, "fan", "input", index, page,
|
|
pmbus_fan_registers[f], PSC_FAN, true,
|
|
true);
|
|
|
|
/*
|
|
* 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;
|
|
pmbus_add_boolean_reg(data, "fan", "alarm",
|
|
index, base,
|
|
PB_FAN_FAN1_WARNING >> (f & 1));
|
|
pmbus_add_boolean_reg(data, "fan", "fault",
|
|
index, base,
|
|
PB_FAN_FAN1_FAULT >> (f & 1));
|
|
}
|
|
index++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pmbus_find_attributes(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
/* Voltage sensors */
|
|
pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
|
|
ARRAY_SIZE(voltage_attributes));
|
|
|
|
/* Current sensors */
|
|
pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
|
|
ARRAY_SIZE(current_attributes));
|
|
|
|
/* Power sensors */
|
|
pmbus_add_sensor_attrs(client, data, "power", power_attributes,
|
|
ARRAY_SIZE(power_attributes));
|
|
|
|
/* Temperature sensors */
|
|
pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
|
|
ARRAY_SIZE(temp_attributes));
|
|
|
|
/* Fans */
|
|
pmbus_add_fan_attributes(client, data);
|
|
}
|
|
|
|
/*
|
|
* 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, exponent;
|
|
|
|
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->direct[PSC_VOLTAGE_OUT])
|
|
return -ENODEV;
|
|
|
|
exponent = vout_mode & 0x1f;
|
|
/* and sign-extend it */
|
|
if (exponent & 0x10)
|
|
exponent |= ~0x1f;
|
|
data->exponent = exponent;
|
|
break;
|
|
case 2: /* direct mode */
|
|
if (!data->info->direct[PSC_VOLTAGE_OUT])
|
|
return -ENODEV;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
/* Determine maximum number of sensors, booleans, and labels */
|
|
pmbus_find_max_attr(client, data);
|
|
pmbus_clear_fault_page(client, 0);
|
|
return 0;
|
|
}
|
|
|
|
int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
|
|
struct pmbus_driver_info *info)
|
|
{
|
|
const struct pmbus_platform_data *pdata = client->dev.platform_data;
|
|
struct pmbus_data *data;
|
|
int ret;
|
|
|
|
if (!info) {
|
|
dev_err(&client->dev, "Missing chip information");
|
|
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 = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data) {
|
|
dev_err(&client->dev, "No memory to allocate driver data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/*
|
|
* Bail out if status register or PMBus revision register
|
|
* does not exist.
|
|
*/
|
|
if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0
|
|
|| i2c_smbus_read_byte_data(client, PMBUS_REVISION) < 0) {
|
|
dev_err(&client->dev,
|
|
"Status or revision register not found\n");
|
|
ret = -ENODEV;
|
|
goto out_data;
|
|
}
|
|
|
|
if (pdata)
|
|
data->flags = pdata->flags;
|
|
data->info = info;
|
|
|
|
pmbus_clear_faults(client);
|
|
|
|
if (info->identify) {
|
|
ret = (*info->identify)(client, info);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Chip identification failed\n");
|
|
goto out_data;
|
|
}
|
|
}
|
|
|
|
if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
|
|
dev_err(&client->dev, "Bad number of PMBus pages: %d\n",
|
|
info->pages);
|
|
ret = -EINVAL;
|
|
goto out_data;
|
|
}
|
|
/*
|
|
* Bail out if more than one page was configured, but we can not
|
|
* select the highest page. This is an indication that the wrong
|
|
* chip type was selected. Better bail out now than keep
|
|
* returning errors later on.
|
|
*/
|
|
if (info->pages > 1 && pmbus_set_page(client, info->pages - 1) < 0) {
|
|
dev_err(&client->dev, "Failed to select page %d\n",
|
|
info->pages - 1);
|
|
ret = -EINVAL;
|
|
goto out_data;
|
|
}
|
|
|
|
ret = pmbus_identify_common(client, data);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to identify chip capabilities\n");
|
|
goto out_data;
|
|
}
|
|
|
|
ret = -ENOMEM;
|
|
data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors,
|
|
GFP_KERNEL);
|
|
if (!data->sensors) {
|
|
dev_err(&client->dev, "No memory to allocate sensor data\n");
|
|
goto out_data;
|
|
}
|
|
|
|
data->booleans = kzalloc(sizeof(struct pmbus_boolean)
|
|
* data->max_booleans, GFP_KERNEL);
|
|
if (!data->booleans) {
|
|
dev_err(&client->dev, "No memory to allocate boolean data\n");
|
|
goto out_sensors;
|
|
}
|
|
|
|
data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels,
|
|
GFP_KERNEL);
|
|
if (!data->labels) {
|
|
dev_err(&client->dev, "No memory to allocate label data\n");
|
|
goto out_booleans;
|
|
}
|
|
|
|
data->attributes = kzalloc(sizeof(struct attribute *)
|
|
* data->max_attributes, GFP_KERNEL);
|
|
if (!data->attributes) {
|
|
dev_err(&client->dev, "No memory to allocate attribute data\n");
|
|
goto out_labels;
|
|
}
|
|
|
|
pmbus_find_attributes(client, data);
|
|
|
|
/*
|
|
* If there are no attributes, something is wrong.
|
|
* Bail out instead of trying to register nothing.
|
|
*/
|
|
if (!data->num_attributes) {
|
|
dev_err(&client->dev, "No attributes found\n");
|
|
ret = -ENODEV;
|
|
goto out_attributes;
|
|
}
|
|
|
|
/* Register sysfs hooks */
|
|
data->group.attrs = data->attributes;
|
|
ret = sysfs_create_group(&client->dev.kobj, &data->group);
|
|
if (ret) {
|
|
dev_err(&client->dev, "Failed to create sysfs entries\n");
|
|
goto out_attributes;
|
|
}
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
ret = PTR_ERR(data->hwmon_dev);
|
|
dev_err(&client->dev, "Failed to register hwmon device\n");
|
|
goto out_hwmon_device_register;
|
|
}
|
|
return 0;
|
|
|
|
out_hwmon_device_register:
|
|
sysfs_remove_group(&client->dev.kobj, &data->group);
|
|
out_attributes:
|
|
kfree(data->attributes);
|
|
out_labels:
|
|
kfree(data->labels);
|
|
out_booleans:
|
|
kfree(data->booleans);
|
|
out_sensors:
|
|
kfree(data->sensors);
|
|
out_data:
|
|
kfree(data);
|
|
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);
|
|
sysfs_remove_group(&client->dev.kobj, &data->group);
|
|
kfree(data->attributes);
|
|
kfree(data->labels);
|
|
kfree(data->booleans);
|
|
kfree(data->sensors);
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_do_remove);
|
|
|
|
MODULE_AUTHOR("Guenter Roeck");
|
|
MODULE_DESCRIPTION("PMBus core driver");
|
|
MODULE_LICENSE("GPL");
|