wl1251: read default MAC address from EEPROM when available
Some wl1251 hardware configurations (like in WG7210 module) have
EEPROM attached where NVS data is kept, which includes MAC address.
In such configurations, let's read default MAC address from EEPROM,
instead of using random one.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl1251_main.c b/drivers/net/wireless/wl12xx/wl1251_main.c
index 7b8b212..390cee7 100644
--- a/drivers/net/wireless/wl12xx/wl1251_main.c
+++ b/drivers/net/wireless/wl12xx/wl1251_main.c
@@ -1195,6 +1195,66 @@
.conf_tx = wl1251_op_conf_tx,
};
+static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
+{
+ unsigned long timeout;
+
+ wl1251_reg_write32(wl, EE_ADDR, offset);
+ wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
+
+ /* EE_CTL_READ clears when data is ready */
+ timeout = jiffies + msecs_to_jiffies(100);
+ while (1) {
+ if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
+ break;
+
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ msleep(1);
+ }
+
+ *data = wl1251_reg_read32(wl, EE_DATA);
+ return 0;
+}
+
+static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
+ u8 *data, size_t len)
+{
+ size_t i;
+ int ret;
+
+ wl1251_reg_write32(wl, EE_START, 0);
+
+ for (i = 0; i < len; i++) {
+ ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int wl1251_read_eeprom_mac(struct wl1251 *wl)
+{
+ u8 mac[ETH_ALEN];
+ int i, ret;
+
+ wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
+
+ ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
+ if (ret < 0) {
+ wl1251_warning("failed to read MAC address from EEPROM");
+ return ret;
+ }
+
+ /* MAC is stored in reverse order */
+ for (i = 0; i < ETH_ALEN; i++)
+ wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
+
+ return 0;
+}
+
static int wl1251_register_hw(struct wl1251 *wl)
{
int ret;
@@ -1241,6 +1301,9 @@
wl->hw->queues = 4;
+ if (wl->use_eeprom)
+ wl1251_read_eeprom_mac(wl);
+
ret = wl1251_register_hw(wl);
if (ret)
goto out;