107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
|
/*
|
||
|
|
* syseeprom_device_driver.c
|
||
|
|
*
|
||
|
|
* This module realize /sys/s3ip/syseeprom attributes read and write functions
|
||
|
|
*
|
||
|
|
* History
|
||
|
|
* [Version] [Date] [Description]
|
||
|
|
* * v1.0 2021-08-31 S3IP sysfs
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
#include "device_driver_common.h"
|
||
|
|
#include "syseeprom_sysfs.h"
|
||
|
|
|
||
|
|
#define SYSE2_INFO(fmt, args...) LOG_INFO("syseeprom: ", fmt, ##args)
|
||
|
|
#define SYSE2_ERR(fmt, args...) LOG_ERR("syseeprom: ", fmt, ##args)
|
||
|
|
#define SYSE2_DBG(fmt, args...) LOG_DBG("syseeprom: ", fmt, ##args)
|
||
|
|
|
||
|
|
static int g_loglevel = 0;
|
||
|
|
|
||
|
|
/*****************************************syseeprom*******************************************/
|
||
|
|
/*
|
||
|
|
* demo_get_syseeprom_size - Used to get syseeprom size
|
||
|
|
*
|
||
|
|
* This function returns the size of syseeprom by your switch,
|
||
|
|
* otherwise it returns a negative value on failed.
|
||
|
|
*/
|
||
|
|
static int demo_get_syseeprom_size(void)
|
||
|
|
{
|
||
|
|
/* add vendor codes here */
|
||
|
|
return 256;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* demo_read_syseeprom_data - Used to read syseeprom data,
|
||
|
|
* @buf: Data read buffer
|
||
|
|
* @offset: offset address to read syseeprom data
|
||
|
|
* @count: length of buf
|
||
|
|
*
|
||
|
|
* This function returns the length of the filled buffer,
|
||
|
|
* returns 0 means EOF,
|
||
|
|
* otherwise it returns a negative value on failed.
|
||
|
|
*/
|
||
|
|
static ssize_t demo_read_syseeprom_data(char *buf, loff_t offset, size_t count)
|
||
|
|
{
|
||
|
|
/* add vendor codes here */
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* demo_write_syseeprom_data - Used to write syseeprom data
|
||
|
|
* @buf: Data write buffer
|
||
|
|
* @offset: offset address to write syseeprom data
|
||
|
|
* @count: length of buf
|
||
|
|
*
|
||
|
|
* This function returns the written length of syseeprom,
|
||
|
|
* returns 0 means EOF,
|
||
|
|
* otherwise it returns a negative value on failed.
|
||
|
|
*/
|
||
|
|
static ssize_t demo_write_syseeprom_data(char *buf, loff_t offset, size_t count)
|
||
|
|
{
|
||
|
|
/* add vendor codes here */
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
/*************************************end of syseeprom****************************************/
|
||
|
|
|
||
|
|
static struct s3ip_sysfs_syseeprom_drivers_s drivers = {
|
||
|
|
/*
|
||
|
|
* set ODM syseeprom drivers to /sys/s3ip/syseeprom,
|
||
|
|
* if not support the function, set corresponding hook to NULL.
|
||
|
|
*/
|
||
|
|
.get_syseeprom_size = demo_get_syseeprom_size,
|
||
|
|
.read_syseeprom_data = demo_read_syseeprom_data,
|
||
|
|
.write_syseeprom_data = demo_write_syseeprom_data,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init syseeprom_dev_drv_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
SYSE2_INFO("syseeprom_dev_drv_init...\n");
|
||
|
|
|
||
|
|
ret = s3ip_sysfs_syseeprom_drivers_register(&drivers);
|
||
|
|
if (ret < 0) {
|
||
|
|
SYSE2_ERR("syseeprom drivers register err, ret %d.\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
SYSE2_INFO("syseeprom_dev_drv_init success.\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit syseeprom_dev_drv_exit(void)
|
||
|
|
{
|
||
|
|
s3ip_sysfs_syseeprom_drivers_unregister();
|
||
|
|
SYSE2_INFO("syseeprom_exit success.\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(syseeprom_dev_drv_init);
|
||
|
|
module_exit(syseeprom_dev_drv_exit);
|
||
|
|
module_param(g_loglevel, int, 0644);
|
||
|
|
MODULE_PARM_DESC(g_loglevel, "the log level(info=0x1, err=0x2, dbg=0x4, all=0xf).\n");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_AUTHOR("sonic S3IP sysfs");
|
||
|
|
MODULE_DESCRIPTION("syseeprom device driver");
|