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|
/*
* Based on the work of Tony Sun
* Zhenglq : Add for Get nv data from modem using SMEM.
*/
#include <linux/types.h>
#include <linux/proc_fs.h>
#include "smd_private.h"
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#define NV_WIFI_ADDR_SIZE 6
#define NV_BT_ADDR_SIZE 6
#define NV_MAX_SIZE 512
struct smem_nv {
unsigned char nv_wifi[NV_WIFI_ADDR_SIZE];
unsigned char nv_bt[NV_BT_ADDR_SIZE];
};
static struct smem_nv *psmem_nv = NULL;
static int smem_read_nv(void)
{
struct smem_nv *buf;
buf = smem_alloc(SMEM_ID_VENDOR_READ_NV, NV_MAX_SIZE,SMEM_APPS, 2);
if (!buf) {
printk(KERN_ERR "SMEM_ID_VENDOR_READ_NV smem_alloc failed\n");
return 1;
}
psmem_nv = kzalloc(sizeof(struct smem_nv), GFP_KERNEL);
if (!psmem_nv) {
printk(KERN_ERR "++++++++++++++++++++++=malloc psmem_nv fail\n");
return 1;
}
memcpy(psmem_nv, buf, sizeof(struct smem_nv));
return 0;
}
static long dump_wifi_addr(struct file *filp, char __user *buf,
size_t count, loff_t *f_pos)
{
loff_t pos = *f_pos;
int ret;
ret = smem_read_nv();
if (ret) {
pr_info("%s: smem_read_nv() failed", __func__);
return ret;
}
if (!psmem_nv)
{
printk(KERN_ERR "Could not get smem for wlan mac nv\n");
return 0;
}
if (pos >= NV_WIFI_ADDR_SIZE) {
count = 0;
goto out;
}
if (count > (NV_WIFI_ADDR_SIZE - pos))
count = NV_WIFI_ADDR_SIZE - pos;
pos += count;
if (copy_to_user(buf, psmem_nv->nv_wifi + *f_pos,count)) {
count = -EFAULT;
goto out;
}
*f_pos = pos;
out:
return count;
}
int wlan_get_nv_mac(char* buf)
{
int ret;
ret = smem_read_nv();
if (ret) {
pr_info("%s: smem_read_nv() failed", __func__);
return ret;
}
if (!psmem_nv){
printk(KERN_ERR "Could not get smem for wlan mac nv\n");
return -1;
}
memcpy(buf, psmem_nv->nv_wifi, NV_WIFI_ADDR_SIZE);
return 0;
}
EXPORT_SYMBOL_GPL(wlan_get_nv_mac);
#define DECLARE_FOPS(name) static const struct file_operations name## _fops = { \
.read = name, \
};
static long dump_bt_addr(struct file *filp, char __user *buf,
size_t count, loff_t *f_pos)
{
loff_t pos = *f_pos;
size_t len;
if (!psmem_nv)
smem_read_nv();
if (!psmem_nv) {
printk(KERN_ERR "Could not get smem for bt mac nv\n");
return 0;
}
len = sizeof(psmem_nv->nv_bt);
if(pos >= len ) {
count = 0;
goto out;
}
if(count > (len - pos))
count = len - pos;
pos += count;
if(copy_to_user(buf,psmem_nv->nv_bt + (*f_pos),count)){
count = -EFAULT;
goto out;
}
*f_pos = pos;
out:
return count;
}
DECLARE_FOPS(dump_wifi_addr)
DECLARE_FOPS(dump_bt_addr)
static int show_nv(void)
{
struct proc_dir_entry *wifi_addr_entry;
struct proc_dir_entry *bt_addr_entry;
wifi_addr_entry = proc_create("mac_wifi", 0, NULL, &dump_wifi_addr_fops);
bt_addr_entry = proc_create("mac_bt", 0, NULL, &dump_bt_addr_fops);
if (!wifi_addr_entry) {
pr_info("%s: failed to create mac_wifi entry", __func__);
remove_proc_entry("mac_wifi", NULL);
return 1;
}
if (!bt_addr_entry) {
pr_info("%s: failed to create mac_bt entry", __func__);
remove_proc_entry("mac_bt", NULL);
return 1;
}
return 0;
}
static int __init shenqi_nv_init(void)
{
int ret = 0;
printk("%s(),%d\n" ,__func__, __LINE__);
ret = show_nv();
if (ret) {
pr_info("%s: show_nv() failed", __func__);
return 0;
}
return 1;
}
static void __exit shenqi_nv_exit(void)
{
printk("%s(),%d\n", __func__, __LINE__);
kfree(psmem_nv);
psmem_nv = NULL;
}
late_initcall(shenqi_nv_init);
module_exit(shenqi_nv_exit);
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