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sonic-buildimage/platform/broadcom/sonic-platform-modules-accton/as9726-32d/modules/x86-64-accton-as9726-32d-fan.c

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[Platform] Accton add to support as9726-32d platform. (#7479) Add support for Accton as9726-32d platform This pull request is based on as9716-32d, so I reference as9716-32d to create new model: as9726-32d. This module do not need led driver to control led, FPGA can handle it. I also implement API2.0(sonic_platform) for this model, CPLD driver, PSU driver, Fan driver to control these HW behavior.
2021-05-11 21:06:36 -05:00
/*
* A hwmon driver for the Accton as9726 32d fan
*
* Copyright (C) 2014 Accton Technology Corporation.
* Brandon Chuang <brandon_chuang@accton.com.tw>
*
* 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/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/dmi.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#define DRVNAME "as9726_32d_fan"
static struct as9726_32d_fan_data *as9726_32d_fan_update_device(struct device *dev);
static ssize_t fan_show_value(struct device *dev, struct device_attribute *da, char *buf);
static ssize_t set_duty_cycle(struct device *dev, struct device_attribute *da,
const char *buf, size_t count);
/* fan related data, the index should match sysfs_fan_attributes
*/
static const u8 fan_reg[] = {
0x0F, /* fan 1-6 present status */
0x10, /* fan 1-6 direction(0:F2B 1:B2F) */
0x11, /* fan PWM(for all fan) */
0x12, /* front fan 1 speed(rpm) */
0x13, /* front fan 2 speed(rpm) */
0x14, /* front fan 3 speed(rpm) */
0x15, /* front fan 4 speed(rpm) */
0x16, /* front fan 5 speed(rpm) */
0x17, /* front fan 6 speed(rpm) */
0x22, /* rear fan 1 speed(rpm) */
0x23, /* rear fan 2 speed(rpm) */
0x24, /* rear fan 3 speed(rpm) */
0x25, /* rear fan 4 speed(rpm) */
0x26, /* rear fan 5 speed(rpm) */
0x27, /* rear fan 6 speed(rpm) */
};
/* Each client has this additional data */
struct as9726_32d_fan_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* != 0 if registers are valid */
unsigned long last_updated; /* In jiffies */
u8 reg_val[ARRAY_SIZE(fan_reg)]; /* Register value */
int system_temp; /*In unit of mini-Celsius*/
int sensors_found;
};
enum fan_id {
FAN1_ID,
FAN2_ID,
FAN3_ID,
FAN4_ID,
FAN5_ID,
FAN6_ID
};
enum sysfs_fan_attributes {
FAN_PRESENT_REG,
FAN_DIRECTION_REG,
FAN_DUTY_CYCLE_PERCENTAGE, /* Only one CPLD register to control duty cycle for all fans */
FAN1_FRONT_SPEED_RPM,
FAN2_FRONT_SPEED_RPM,
FAN3_FRONT_SPEED_RPM,
FAN4_FRONT_SPEED_RPM,
FAN5_FRONT_SPEED_RPM,
FAN6_FRONT_SPEED_RPM,
FAN1_REAR_SPEED_RPM,
FAN2_REAR_SPEED_RPM,
FAN3_REAR_SPEED_RPM,
FAN4_REAR_SPEED_RPM,
FAN5_REAR_SPEED_RPM,
FAN6_REAR_SPEED_RPM,
FAN1_DIRECTION,
FAN2_DIRECTION,
FAN3_DIRECTION,
FAN4_DIRECTION,
FAN5_DIRECTION,
FAN6_DIRECTION,
FAN1_PRESENT,
FAN2_PRESENT,
FAN3_PRESENT,
FAN4_PRESENT,
FAN5_PRESENT,
FAN6_PRESENT,
FAN1_FAULT,
FAN2_FAULT,
FAN3_FAULT,
FAN4_FAULT,
FAN5_FAULT,
FAN6_FAULT
};
/* Define attributes
*/
#define DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(index) \
static SENSOR_DEVICE_ATTR(fan##index##_fault, S_IRUGO, fan_show_value, NULL, FAN##index##_FAULT)
#define DECLARE_FAN_FAULT_ATTR(index) &sensor_dev_attr_fan##index##_fault.dev_attr.attr
#define DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(index) \
static SENSOR_DEVICE_ATTR(fan##index##_direction, S_IRUGO, fan_show_value, NULL, FAN##index##_DIRECTION)
#define DECLARE_FAN_DIRECTION_ATTR(index) &sensor_dev_attr_fan##index##_direction.dev_attr.attr
#define DECLARE_FAN_DUTY_CYCLE_SENSOR_DEV_ATTR(index) \
static SENSOR_DEVICE_ATTR(fan##index##_duty_cycle_percentage, S_IWUSR | S_IRUGO, fan_show_value, set_duty_cycle, FAN##index##_DUTY_CYCLE_PERCENTAGE)
#define DECLARE_FAN_DUTY_CYCLE_ATTR(index) &sensor_dev_attr_fan##index##_duty_cycle_percentage.dev_attr.attr
#define DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(index) \
static SENSOR_DEVICE_ATTR(fan##index##_present, S_IRUGO, fan_show_value, NULL, FAN##index##_PRESENT)
#define DECLARE_FAN_PRESENT_ATTR(index) &sensor_dev_attr_fan##index##_present.dev_attr.attr
#define DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(index, index2) \
static SENSOR_DEVICE_ATTR(fan##index##_front_speed_rpm, S_IRUGO, fan_show_value, NULL, FAN##index##_FRONT_SPEED_RPM);\
static SENSOR_DEVICE_ATTR(fan##index##_rear_speed_rpm, S_IRUGO, fan_show_value, NULL, FAN##index##_REAR_SPEED_RPM);\
static SENSOR_DEVICE_ATTR(fan##index##_input, S_IRUGO, fan_show_value, NULL, FAN##index##_FRONT_SPEED_RPM);\
static SENSOR_DEVICE_ATTR(fan##index2##_input, S_IRUGO, fan_show_value, NULL, FAN##index##_REAR_SPEED_RPM)
#define DECLARE_FAN_SPEED_RPM_ATTR(index, index2) &sensor_dev_attr_fan##index##_front_speed_rpm.dev_attr.attr, \
&sensor_dev_attr_fan##index##_rear_speed_rpm.dev_attr.attr, \
&sensor_dev_attr_fan##index##_input.dev_attr.attr, \
&sensor_dev_attr_fan##index2##_input.dev_attr.attr
/* 6 fan fault attributes in this platform */
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(1);
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(2);
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(3);
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(4);
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(5);
DECLARE_FAN_FAULT_SENSOR_DEV_ATTR(6);
/* 6 fan speed(rpm) attributes in this platform */
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(1,11);
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(2,12);
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(3,13);
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(4,14);
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(5,15);
DECLARE_FAN_SPEED_RPM_SENSOR_DEV_ATTR(6,16);
/* 6 fan present attributes in this platform */
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(1);
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(2);
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(3);
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(4);
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(5);
DECLARE_FAN_PRESENT_SENSOR_DEV_ATTR(6);
/* 6 fan direction attribute in this platform */
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(1);
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(2);
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(3);
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(4);
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(5);
DECLARE_FAN_DIRECTION_SENSOR_DEV_ATTR(6);
/* 1 fan duty cycle attribute in this platform */
DECLARE_FAN_DUTY_CYCLE_SENSOR_DEV_ATTR();
static struct attribute *as9726_32d_fan_attributes[] = {
/* fan related attributes */
DECLARE_FAN_FAULT_ATTR(1),
DECLARE_FAN_FAULT_ATTR(2),
DECLARE_FAN_FAULT_ATTR(3),
DECLARE_FAN_FAULT_ATTR(4),
DECLARE_FAN_FAULT_ATTR(5),
DECLARE_FAN_FAULT_ATTR(6),
DECLARE_FAN_SPEED_RPM_ATTR(1,11),
DECLARE_FAN_SPEED_RPM_ATTR(2,12),
DECLARE_FAN_SPEED_RPM_ATTR(3,13),
DECLARE_FAN_SPEED_RPM_ATTR(4,14),
DECLARE_FAN_SPEED_RPM_ATTR(5,15),
DECLARE_FAN_SPEED_RPM_ATTR(6,16),
DECLARE_FAN_PRESENT_ATTR(1),
DECLARE_FAN_PRESENT_ATTR(2),
DECLARE_FAN_PRESENT_ATTR(3),
DECLARE_FAN_PRESENT_ATTR(4),
DECLARE_FAN_PRESENT_ATTR(5),
DECLARE_FAN_PRESENT_ATTR(6),
DECLARE_FAN_DIRECTION_ATTR(1),
DECLARE_FAN_DIRECTION_ATTR(2),
DECLARE_FAN_DIRECTION_ATTR(3),
DECLARE_FAN_DIRECTION_ATTR(4),
DECLARE_FAN_DIRECTION_ATTR(5),
DECLARE_FAN_DIRECTION_ATTR(6),
DECLARE_FAN_DUTY_CYCLE_ATTR(),
NULL
};
#define FAN_DUTY_CYCLE_REG_MASK 0xF
#define FAN_MAX_DUTY_CYCLE 100
#define FAN_REG_VAL_TO_SPEED_RPM_STEP 200
static int as9726_32d_fan_read_value(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int as9726_32d_fan_write_value(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
/* fan utility functions
*/
static u32 reg_val_to_duty_cycle(u8 reg_val)
{
reg_val &= FAN_DUTY_CYCLE_REG_MASK;
u32 duty_cycle = 0;
switch(reg_val)
{
case 0:
duty_cycle = 0;
break;
case 5 ... 6:
duty_cycle = ( ((u32)(reg_val)+1) *6) + 1;
break;
case 7 ... 10:
duty_cycle = ( ((u32)(reg_val)+1) *6) + 2;
break;
case 11 ... 14:
duty_cycle = ( ((u32)(reg_val)+1) *6) + 3;
break;
case 15:
duty_cycle = 100;
break;
default: // 1~4
duty_cycle = 31;
break;
}
return duty_cycle;
}
static u8 duty_cycle_to_reg_val(u8 duty_cycle)
{
u32 reg_val = 0;
if((u32)duty_cycle == 0) {
reg_val = 0;
}
else if((u32)duty_cycle <= 31) {
reg_val = 4;
}
else if((u32)duty_cycle <= 37) {
reg_val = 5;
}
else if((u32)duty_cycle <= 43) {
reg_val = 6;
}
else if((u32)duty_cycle <= 50) {
reg_val = 7;
}
else if((u32)duty_cycle <= 56) {
reg_val = 8;
}
else if((u32)duty_cycle <= 62) {
reg_val = 9;
}
else if((u32)duty_cycle <= 68) {
reg_val = 10;
}
else if((u32)duty_cycle <= 75) {
reg_val = 11;
}
else if((u32)duty_cycle <= 81) {
reg_val = 12;
}
else if((u32)duty_cycle <= 87) {
reg_val = 13;
}
else if((u32)duty_cycle <= 93) {
reg_val = 14;
}
else {
reg_val = 15;
}
return reg_val;
}
static u32 reg_val_to_speed_rpm(u8 reg_val)
{
return (u32)reg_val * FAN_REG_VAL_TO_SPEED_RPM_STEP;
}
static u8 reg_val_to_direction(u8 reg_val, enum fan_id id)
{
u8 mask = (1 << id);
reg_val &= mask;
return reg_val ? 1 : 0;
}
static u8 reg_val_to_is_present(u8 reg_val, enum fan_id id)
{
u8 mask = (1 << id);
reg_val &= mask;
return reg_val ? 0 : 1;
}
static u8 is_fan_fault(struct as9726_32d_fan_data *data, enum fan_id id)
{
u8 ret = 1;
int front_fan_index = FAN1_FRONT_SPEED_RPM + id;
int rear_fan_index = FAN1_REAR_SPEED_RPM + id;
/* Check if the speed of front or rear fan is ZERO,
*/
if (reg_val_to_speed_rpm(data->reg_val[front_fan_index]) &&
reg_val_to_speed_rpm(data->reg_val[rear_fan_index])) {
ret = 0;
}
return ret;
}
static ssize_t set_duty_cycle(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
int error, value;
struct i2c_client *client = to_i2c_client(dev);
error = kstrtoint(buf, 10, &value);
if (error)
return error;
if (value < 0 || value > FAN_MAX_DUTY_CYCLE)
return -EINVAL;
as9726_32d_fan_write_value(client, 0x33, 0); /* Disable fan speed watch dog */
as9726_32d_fan_write_value(client, fan_reg[FAN_DUTY_CYCLE_PERCENTAGE], duty_cycle_to_reg_val(value));
return count;
}
static ssize_t fan_show_value(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct as9726_32d_fan_data *data = as9726_32d_fan_update_device(dev);
ssize_t ret = 0;
if (data->valid) {
switch (attr->index) {
case FAN_DUTY_CYCLE_PERCENTAGE:
{
u32 duty_cycle = reg_val_to_duty_cycle(data->reg_val[FAN_DUTY_CYCLE_PERCENTAGE]);
ret = sprintf(buf, "%u\n", duty_cycle);
break;
}
case FAN1_FRONT_SPEED_RPM:
case FAN2_FRONT_SPEED_RPM:
case FAN3_FRONT_SPEED_RPM:
case FAN4_FRONT_SPEED_RPM:
case FAN5_FRONT_SPEED_RPM:
case FAN6_FRONT_SPEED_RPM:
case FAN1_REAR_SPEED_RPM:
case FAN2_REAR_SPEED_RPM:
case FAN3_REAR_SPEED_RPM:
case FAN4_REAR_SPEED_RPM:
case FAN5_REAR_SPEED_RPM:
case FAN6_REAR_SPEED_RPM:
ret = sprintf(buf, "%u\n", reg_val_to_speed_rpm(data->reg_val[attr->index]));
break;
case FAN1_PRESENT:
case FAN2_PRESENT:
case FAN3_PRESENT:
case FAN4_PRESENT:
case FAN5_PRESENT:
case FAN6_PRESENT:
ret = sprintf(buf, "%d\n",
reg_val_to_is_present(data->reg_val[FAN_PRESENT_REG],
attr->index - FAN1_PRESENT));
break;
case FAN1_FAULT:
case FAN2_FAULT:
case FAN3_FAULT:
case FAN4_FAULT:
case FAN5_FAULT:
case FAN6_FAULT:
ret = sprintf(buf, "%d\n", is_fan_fault(data, attr->index - FAN1_FAULT));
break;
case FAN1_DIRECTION:
case FAN2_DIRECTION:
case FAN3_DIRECTION:
case FAN4_DIRECTION:
case FAN5_DIRECTION:
case FAN6_DIRECTION:
ret = sprintf(buf, "%d\n",
reg_val_to_direction(data->reg_val[FAN_DIRECTION_REG],
attr->index - FAN1_DIRECTION));
break;
default:
break;
}
}
return ret;
}
static const struct attribute_group as9726_32d_fan_group = {
.attrs = as9726_32d_fan_attributes,
};
static struct as9726_32d_fan_data *as9726_32d_fan_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct as9726_32d_fan_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2) ||
!data->valid) {
int i;
dev_dbg(&client->dev, "Starting as9726_32d_fan update\n");
data->valid = 0;
/* Update fan data
*/
for (i = 0; i < ARRAY_SIZE(data->reg_val); i++) {
int status = as9726_32d_fan_read_value(client, fan_reg[i]);
if (status < 0) {
data->valid = 0;
mutex_unlock(&data->update_lock);
dev_dbg(&client->dev, "reg %d, err %d\n", fan_reg[i], status);
return data;
}
else {
data->reg_val[i] = status;
}
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int as9726_32d_fan_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
struct as9726_32d_fan_data *data;
int status;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
status = -EIO;
goto exit;
}
data = kzalloc(sizeof(struct as9726_32d_fan_data), GFP_KERNEL);
if (!data) {
status = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
data->valid = 0;
mutex_init(&data->update_lock);
dev_info(&client->dev, "chip found\n");
/* Register sysfs hooks */
status = sysfs_create_group(&client->dev.kobj, &as9726_32d_fan_group);
if (status) {
goto exit_free;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
status = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
dev_info(&client->dev, "%s: fan '%s'\n",
dev_name(data->hwmon_dev), client->name);
return 0;
exit_remove:
sysfs_remove_group(&client->dev.kobj, &as9726_32d_fan_group);
exit_free:
kfree(data);
exit:
return status;
}
static int as9726_32d_fan_remove(struct i2c_client *client)
{
struct as9726_32d_fan_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &as9726_32d_fan_group);
return 0;
}
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x66, I2C_CLIENT_END };
static const struct i2c_device_id as9726_32d_fan_id[] = {
{ "as9726_32d_fan", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, as9726_32d_fan_id);
static struct i2c_driver as9726_32d_fan_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = DRVNAME,
},
.probe = as9726_32d_fan_probe,
.remove = as9726_32d_fan_remove,
.id_table = as9726_32d_fan_id,
.address_list = normal_i2c,
};
module_i2c_driver(as9726_32d_fan_driver);
MODULE_AUTHOR("Michael Shih <michael_shih@edge-core.com>");
MODULE_DESCRIPTION("as9726_32d_fan driver");
MODULE_LICENSE("GPL");
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