1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1251_main.c b/drivers/net/wireless/wl12xx/wl1251_main.c
index 4d479708158d..51614d181ccb 100644
--- a/drivers/net/wireless/wl12xx/wl1251_main.c
+++ b/drivers/net/wireless/wl12xx/wl1251_main.c
@@ -1196,6 +1196,66 @@ static const struct ieee80211_ops wl1251_ops = {
         .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;
@@ -1242,6 +1302,9 @@ int wl1251_init_ieee80211(struct wl1251 *wl)
 
         wl->hw->queues = 4;
 
+        if (wl->use_eeprom)
+                wl1251_read_eeprom_mac(wl);
+
         ret = wl1251_register_hw(wl);
         if (ret)
                 goto out;