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sonic-buildimage/platform/broadcom/sonic-platform-modules-accton/as5812-54t/modules/x86-64-accton-as5812-54t-fan.c
Roy Lee 9179990ba1 [device][accton] Add as5812-54t. (#3428) 
* Verified as5812_54t platfrom, except SDK and monitor.
Signed-off-by: roy_lee <roy_lee@accton.com>

* Add as5812-54t to build its debian package.
Signed-off-by: roy_lee <roy_lee@accton.com>

* Use the right cpld read/write api.
Signed-off-by: roy_lee <roy_lee@accton.com>

* Update device paths.
Signed-off-by: roy_lee <roy_lee@accton.com>

* update psu driver, correct python lib location.
Signed-off-by: roy_lee <roy_lee@accton.com>

* Give a default return value.
Signed-off-by: roy_lee <roy_lee@accton.com>
2019-09-10 22:07:13 -07:00

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/*
* A hwmon driver for the Accton as5812 54t fan
*
* Copyright (C) 2015 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/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/syscalls.h>
#include <linux/kthread.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#define DRVNAME "as5812_54t_fan"
#define FAN_MAX_NUMBER 5
#define FAN_SPEED_CPLD_TO_RPM_STEP 150
#define FAN_SPEED_PRECENT_TO_CPLD_STEP 5
#define FAN_DUTY_CYCLE_MIN 0
#define FAN_DUTY_CYCLE_MAX 100 /* 100% */
#define CPLD_REG_FAN_STATUS_OFFSET 0xC
#define CPLD_REG_FANR_STATUS_OFFSET 0x1F
#define CPLD_REG_FAN_DIRECTION_OFFSET 0x1E
#define CPLD_FAN1_REG_SPEED_OFFSET 0x10
#define CPLD_FAN2_REG_SPEED_OFFSET 0x11
#define CPLD_FAN3_REG_SPEED_OFFSET 0x12
#define CPLD_FAN4_REG_SPEED_OFFSET 0x13
#define CPLD_FAN5_REG_SPEED_OFFSET 0x14
#define CPLD_FANR1_REG_SPEED_OFFSET 0x18
#define CPLD_FANR2_REG_SPEED_OFFSET 0x19
#define CPLD_FANR3_REG_SPEED_OFFSET 0x1A
#define CPLD_FANR4_REG_SPEED_OFFSET 0x1B
#define CPLD_FANR5_REG_SPEED_OFFSET 0x1C
#define CPLD_REG_FAN_PWM_CYCLE_OFFSET 0xD
#define CPLD_FAN1_INFO_BIT_MASK 0x1
#define CPLD_FAN2_INFO_BIT_MASK 0x2
#define CPLD_FAN3_INFO_BIT_MASK 0x4
#define CPLD_FAN4_INFO_BIT_MASK 0x8
#define CPLD_FAN5_INFO_BIT_MASK 0x10
#define PROJECT_NAME
#define LOCAL_DEBUG 0
static struct accton_as5812_54t_fan *fan_data = NULL;
struct accton_as5812_54t_fan {
struct platform_device *pdev;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* != 0 if registers are valid */
unsigned long last_updated; /* In jiffies */
u8 status[FAN_MAX_NUMBER]; /* inner first fan status */
u32 speed[FAN_MAX_NUMBER]; /* inner first fan speed */
u8 direction[FAN_MAX_NUMBER]; /* reconrd the direction of inner first and second fans */
u32 duty_cycle[FAN_MAX_NUMBER]; /* control the speed of inner first and second fans */
u8 r_status[FAN_MAX_NUMBER]; /* inner second fan status */
u32 r_speed[FAN_MAX_NUMBER]; /* inner second fan speed */
};
/*******************/
#define MAKE_FAN_MASK_OR_REG(name,type) \
CPLD_FAN##type##1_##name, \
CPLD_FAN##type##2_##name, \
CPLD_FAN##type##3_##name, \
CPLD_FAN##type##4_##name, \
CPLD_FAN##type##5_##name,
/* fan related data
*/
static const u8 fan_info_mask[] = {
MAKE_FAN_MASK_OR_REG(INFO_BIT_MASK,)
};
static const u8 fan_speed_reg[] = {
MAKE_FAN_MASK_OR_REG(REG_SPEED_OFFSET,)
};
static const u8 fanr_speed_reg[] = {
MAKE_FAN_MASK_OR_REG(REG_SPEED_OFFSET,R)
};
/*******************/
#define DEF_FAN_SET(id) \
FAN##id##_FAULT, \
FAN##id##_SPEED, \
FAN##id##_DUTY_CYCLE, \
FAN##id##_DIRECTION, \
FANR##id##_FAULT, \
FANR##id##_SPEED,
enum sysfs_fan_attributes {
DEF_FAN_SET(1)
DEF_FAN_SET(2)
DEF_FAN_SET(3)
DEF_FAN_SET(4)
DEF_FAN_SET(5)
};
/*******************/
static void accton_as5812_54t_fan_update_device(struct device *dev);
static int accton_as5812_54t_fan_read_value(u8 reg);
static int accton_as5812_54t_fan_write_value(u8 reg, u8 value);
static ssize_t fan_set_duty_cycle(struct device *dev,
struct device_attribute *da,const char *buf, size_t count);
static ssize_t fan_show_value(struct device *dev,
struct device_attribute *da, char *buf);
static ssize_t show_name(struct device *dev,
struct device_attribute *da, char *buf);
extern int as5812_54t_cpld_read(unsigned short cpld_addr, u8 reg);
extern int as5812_54t_cpld_write(unsigned short cpld_addr, u8 reg, u8 value);
/*******************/
#define _MAKE_SENSOR_DEVICE_ATTR(prj, id, id2) \
static SENSOR_DEVICE_ATTR(prj##fan##id##_speed_rpm, S_IRUGO, fan_show_value, NULL, FAN##id##_SPEED); \
static SENSOR_DEVICE_ATTR(prj##fan##id##_duty_cycle_percentage, S_IWUSR | S_IRUGO, fan_show_value, \
fan_set_duty_cycle, FAN##id##_DUTY_CYCLE); \
static SENSOR_DEVICE_ATTR(prj##pwm##id, S_IWUSR | S_IRUGO, fan_show_value, \
fan_set_duty_cycle, FAN##id##_DUTY_CYCLE); \
static SENSOR_DEVICE_ATTR(prj##fan##id##_direction, S_IRUGO, fan_show_value, NULL, FAN##id##_DIRECTION); \
static SENSOR_DEVICE_ATTR(prj##fanr##id##_fault, S_IRUGO, fan_show_value, NULL, FANR##id##_FAULT); \
static SENSOR_DEVICE_ATTR(prj##fanr##id##_speed_rpm, S_IRUGO, fan_show_value, NULL, FANR##id##_SPEED); \
static SENSOR_DEVICE_ATTR(prj##fan##id##_input, S_IRUGO, fan_show_value, NULL, FAN##id##_SPEED); \
static SENSOR_DEVICE_ATTR(prj##fan##id2##_input, S_IRUGO, fan_show_value, NULL, FANR##id##_SPEED); \
static SENSOR_DEVICE_ATTR(prj##fan##id##_fault, S_IRUGO, fan_show_value, NULL, FAN##id##_FAULT); \
static SENSOR_DEVICE_ATTR(prj##fan##id2##_fault, S_IRUGO, fan_show_value, NULL, FAN##id##_FAULT);
#define MAKE_SENSOR_DEVICE_ATTR(prj,id, id2) _MAKE_SENSOR_DEVICE_ATTR(prj,id, id2)
MAKE_SENSOR_DEVICE_ATTR(PROJECT_NAME,1,11)
MAKE_SENSOR_DEVICE_ATTR(PROJECT_NAME,2,12)
MAKE_SENSOR_DEVICE_ATTR(PROJECT_NAME,3,13)
MAKE_SENSOR_DEVICE_ATTR(PROJECT_NAME,4,14)
MAKE_SENSOR_DEVICE_ATTR(PROJECT_NAME,5,15)
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
/*******************/
#define _MAKE_FAN_ATTR(prj, id, id2) \
&sensor_dev_attr_##prj##fan##id##_speed_rpm.dev_attr.attr, \
&sensor_dev_attr_##prj##fan##id##_duty_cycle_percentage.dev_attr.attr,\
&sensor_dev_attr_##prj##pwm##id.dev_attr.attr,\
&sensor_dev_attr_##prj##fan##id##_direction.dev_attr.attr, \
&sensor_dev_attr_##prj##fanr##id##_fault.dev_attr.attr, \
&sensor_dev_attr_##prj##fanr##id##_speed_rpm.dev_attr.attr, \
&sensor_dev_attr_##prj##fan##id##_input.dev_attr.attr, \
&sensor_dev_attr_##prj##fan##id2##_input.dev_attr.attr, \
&sensor_dev_attr_##prj##fan##id##_fault.dev_attr.attr, \
&sensor_dev_attr_##prj##fan##id2##_fault.dev_attr.attr,
#define MAKE_FAN_ATTR(prj, id, id2) _MAKE_FAN_ATTR(prj, id, id2)
static struct attribute *accton_as5812_54t_fan_attributes[] = {
/* fan related attributes */
MAKE_FAN_ATTR(PROJECT_NAME,1,11)
MAKE_FAN_ATTR(PROJECT_NAME,2,12)
MAKE_FAN_ATTR(PROJECT_NAME,3,13)
MAKE_FAN_ATTR(PROJECT_NAME,4,14)
MAKE_FAN_ATTR(PROJECT_NAME,5,15)
&sensor_dev_attr_name.dev_attr.attr,
NULL
};
/*******************/
/* fan related functions
*/
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);
ssize_t ret = 0;
int data_index, type_index;
accton_as5812_54t_fan_update_device(dev);
if (fan_data->valid == 0) {
return ret;
}
type_index = attr->index%FAN2_FAULT;
data_index = attr->index/FAN2_FAULT;
switch (type_index) {
case FAN1_FAULT:
ret = sprintf(buf, "%d\n", fan_data->status[data_index]);
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
case FAN1_SPEED:
ret = sprintf(buf, "%d\n", fan_data->speed[data_index]);
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
case FAN1_DUTY_CYCLE:
ret = sprintf(buf, "%d\n", fan_data->duty_cycle[data_index]);
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
case FAN1_DIRECTION:
ret = sprintf(buf, "%d\n", fan_data->direction[data_index]); /* presnet, need to modify*/
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
case FANR1_FAULT:
ret = sprintf(buf, "%d\n", fan_data->r_status[data_index]);
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
case FANR1_SPEED:
ret = sprintf(buf, "%d\n", fan_data->r_speed[data_index]);
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d][type->index=%d][data->index=%d]\n", __FUNCTION__, __LINE__, type_index, data_index);
break;
default:
if (LOCAL_DEBUG)
printk ("[Check !!][%s][%d] \n", __FUNCTION__, __LINE__);
break;
}
return ret;
}
static ssize_t show_name(struct device *dev, struct device_attribute *da,
char *buf)
{
return sprintf(buf, "%s\n", DRVNAME);
}
/*******************/
static ssize_t fan_set_duty_cycle(struct device *dev, struct device_attribute *da,
const char *buf, size_t count) {
int error, value;
error = kstrtoint(buf, 10, &value);
if (error)
return error;
if (value < FAN_DUTY_CYCLE_MIN || value > FAN_DUTY_CYCLE_MAX)
return -EINVAL;
accton_as5812_54t_fan_write_value(CPLD_REG_FAN_PWM_CYCLE_OFFSET, value/FAN_SPEED_PRECENT_TO_CPLD_STEP);
fan_data->valid = 0;
return count;
}
static const struct attribute_group accton_as5812_54t_fan_group = {
.attrs = accton_as5812_54t_fan_attributes,
};
static int accton_as5812_54t_fan_read_value(u8 reg)
{
return as5812_54t_cpld_read(0x60, reg);
}
static int accton_as5812_54t_fan_write_value(u8 reg, u8 value)
{
return as5812_54t_cpld_write(0x60, reg, value);
}
static void accton_as5812_54t_fan_update_device(struct device *dev)
{
int speed, r_speed, fault, r_fault, ctrl_speed, direction;
int i;
mutex_lock(&fan_data->update_lock);
if (LOCAL_DEBUG)
printk ("Starting accton_as5812_54t_fan update \n");
if (!(time_after(jiffies, fan_data->last_updated + HZ + HZ / 2) || !fan_data->valid)) {
/* do nothing */
goto _exit;
}
fan_data->valid = 0;
if (LOCAL_DEBUG)
printk ("Starting accton_as5812_54t_fan update 2 \n");
fault = accton_as5812_54t_fan_read_value(CPLD_REG_FAN_STATUS_OFFSET);
r_fault = accton_as5812_54t_fan_read_value(CPLD_REG_FANR_STATUS_OFFSET);
direction = accton_as5812_54t_fan_read_value(CPLD_REG_FAN_DIRECTION_OFFSET);
ctrl_speed = accton_as5812_54t_fan_read_value(CPLD_REG_FAN_PWM_CYCLE_OFFSET);
if ( (fault < 0) || (r_fault < 0) || (direction < 0) || (ctrl_speed < 0) )
{
if (LOCAL_DEBUG)
printk ("[Error!!][%s][%d] \n", __FUNCTION__, __LINE__);
goto _exit; /* error */
}
if (LOCAL_DEBUG)
printk ("[fan:] fault:%d, r_fault=%d, direction=%d, ctrl_speed=%d \n",fault, r_fault, direction, ctrl_speed);
for (i=0; i<FAN_MAX_NUMBER; i++)
{
/* Update fan data
*/
/* fan fault
* 0: normal, 1:abnormal
* Each FAN-tray module has two fans.
*/
fan_data->status[i] = (fault & fan_info_mask[i]) >> i;
if (LOCAL_DEBUG)
printk ("[fan%d:] fail=%d \n",i, fan_data->status[i]);
fan_data->r_status[i] = (r_fault & fan_info_mask[i]) >> i;
fan_data->direction[i] = (direction & fan_info_mask[i]) >> i;
fan_data->duty_cycle[i] = ctrl_speed * FAN_SPEED_PRECENT_TO_CPLD_STEP;
/* fan speed
*/
speed = accton_as5812_54t_fan_read_value(fan_speed_reg[i]);
r_speed = accton_as5812_54t_fan_read_value(fanr_speed_reg[i]);
if ( (speed < 0) || (r_speed < 0) )
{
if (LOCAL_DEBUG)
printk ("[Error!!][%s][%d] \n", __FUNCTION__, __LINE__);
goto _exit; /* error */
}
if (LOCAL_DEBUG)
printk ("[fan%d:] speed:%d, r_speed=%d \n", i, speed, r_speed);
fan_data->speed[i] = speed * FAN_SPEED_CPLD_TO_RPM_STEP;
fan_data->r_speed[i] = r_speed * FAN_SPEED_CPLD_TO_RPM_STEP;
}
/* finish to update */
fan_data->last_updated = jiffies;
fan_data->valid = 1;
_exit:
mutex_unlock(&fan_data->update_lock);
}
static int accton_as5812_54t_fan_probe(struct platform_device *pdev)
{
int status = -1;
/* Register sysfs hooks */
status = sysfs_create_group(&pdev->dev.kobj, &accton_as5812_54t_fan_group);
if (status) {
goto exit;
}
fan_data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(fan_data->hwmon_dev)) {
status = PTR_ERR(fan_data->hwmon_dev);
goto exit_remove;
}
dev_info(&pdev->dev, "accton_as5812_54t_fan\n");
return 0;
exit_remove:
sysfs_remove_group(&pdev->dev.kobj, &accton_as5812_54t_fan_group);
exit:
return status;
}
static int accton_as5812_54t_fan_remove(struct platform_device *pdev)
{
hwmon_device_unregister(fan_data->hwmon_dev);
sysfs_remove_group(&fan_data->pdev->dev.kobj, &accton_as5812_54t_fan_group);
return 0;
}
static struct platform_driver accton_as5812_54t_fan_driver = {
.probe = accton_as5812_54t_fan_probe,
.remove = accton_as5812_54t_fan_remove,
.driver = {
.name = DRVNAME,
.owner = THIS_MODULE,
},
};
static int __init accton_as5812_54t_fan_init(void)
{
int ret;
ret = platform_driver_register(&accton_as5812_54t_fan_driver);
if (ret < 0) {
goto exit;
}
fan_data = kzalloc(sizeof(struct accton_as5812_54t_fan), GFP_KERNEL);
if (!fan_data) {
ret = -ENOMEM;
platform_driver_unregister(&accton_as5812_54t_fan_driver);
goto exit;
}
mutex_init(&fan_data->update_lock);
fan_data->valid = 0;
fan_data->pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
if (IS_ERR(fan_data->pdev)) {
ret = PTR_ERR(fan_data->pdev);
platform_driver_unregister(&accton_as5812_54t_fan_driver);
kfree(fan_data);
goto exit;
}
exit:
return ret;
}
static void __exit accton_as5812_54t_fan_exit(void)
{
platform_device_unregister(fan_data->pdev);
platform_driver_unregister(&accton_as5812_54t_fan_driver);
kfree(fan_data);
}
MODULE_AUTHOR("Brandon Chuang <brandon_chuang@accton.com.tw>");
MODULE_DESCRIPTION("accton_as5812_54t_fan driver");
MODULE_LICENSE("GPL");
module_init(accton_as5812_54t_fan_init);
module_exit(accton_as5812_54t_fan_exit);
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