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efuse: workaround to read hwmac

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Change-Id: Ie5e2f7df0c5a042093e87530a47657720bb23d10
Signed-off-by: Dongjin Kim <tobetter@gmail.com>
(cherry picked from commit fa6c68bf24)
This commit is contained in:
Dongjin Kim
2015-01-12 17:55:22 +09:00
committed by Dongjin Kim
parent 2532e4d157
commit 75afea0bb9
1 changed files with 39 additions and 29 deletions
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68
drivers/amlogic/efuse/efuse.c
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@@ -239,34 +239,55 @@ static const struct file_operations efuse_fops = {
.unlocked_ioctl = efuse_unlocked_ioctl,
};
#define MACCHAR(x) (('A' <= (x) && (x) <= 'F') \
? (x) - 'A' + 'a' : (x))
static char *aml_efuse_mac(void)
{
char hwmac[20];
char buf[80];
efuseinfo_item_t info;
if (efuse_getinfo_byID(EFUSE_MAC_ID, &info) < 0)
return 0;
if (efuse_read_item(buf, info.data_len,
(loff_t*)&info.offset) < 0)
return 0;
sprintf(hwmac, "%02x:%02x:%02x:%02x:%02x:%02x",
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
info.data_len = 16;
info.offset = 4;
efuse_read_item(buf, info.data_len,
(loff_t*)&info.offset);
sprintf(hwmac + 10, "%c:%c%c:%c%c",
MACCHAR(buf[11]), MACCHAR(buf[12]), MACCHAR(buf[13]),
MACCHAR(buf[14]), MACCHAR(buf[15]));
return hwmac;
}
unsigned char *aml_efuse_get_item(unsigned char* key_name)
{
char dec_mac[50] = {0};
efuseinfo_item_t info;
unsigned id=0;
unsigned char *ret;
unsigned char *ret = 0;
int id;
if(strcmp(key_name,"mac")==0) id = EFUSE_MAC_ID;
else if(strcmp(key_name,"mac_bt")==0) id = EFUSE_MAC_BT_ID;
else if(strcmp(key_name,"mac_wifi")==0) id = EFUSE_MAC_WIFI_ID;
else if(strcmp(key_name,"usid")==0) id = EFUSE_USID_ID;
else {
pr_info("%s: UNKNOWN key_name\n", __func__);
return -EFAULT;
return 0;
}
if(efuse_getinfo_byID(id, &info) < 0){
pr_emerg("mac: ID is not found\n");
return -EFAULT;
}
if (efuse_read_item(dec_mac, info.data_len, (loff_t*)&info.offset) < 0) {
pr_emerg("mac: couldn't read efuse now\n");
return -EFAULT;
}
if (id == EFUSE_MAC_ID) {
return aml_efuse_mac();
}
ret = kzalloc(info.data_len + 6, GFP_KERNEL);
sprintf(ret, "%02x:%02x:%02x:%02x:%02x:%02x", dec_mac[0],dec_mac[1],dec_mac[2],dec_mac[3],dec_mac[4],dec_mac[5]);
return ret;
}
EXPORT_SYMBOL(aml_efuse_get_item);
@@ -274,18 +295,7 @@ EXPORT_SYMBOL(aml_efuse_get_item);
/* Sysfs Files */
static ssize_t mac_show(struct class *cla, struct class_attribute *attr, char *buf)
{
char dec_mac[6] = {0};
efuseinfo_item_t info;
if(efuse_getinfo_byID(EFUSE_MAC_ID, &info) < 0){
printk(KERN_INFO"ID is not found\n");
return -EFAULT;
}
if (efuse_read_item(dec_mac, info.data_len, (loff_t*)&info.offset) < 0)
return -EFAULT;
return sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n",
dec_mac[0],dec_mac[1],dec_mac[2],dec_mac[3],dec_mac[4],dec_mac[5]);
return sprintf(buf, "%s\n", aml_efuse_mac());
}
static ssize_t mac_wifi_show(struct class *cla, struct class_attribute *attr, char *buf)