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path: root/drivers/net/wireless/wl12xx/wl1251_main.c
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Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_main.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1251_main.c63
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 7b8b21212bf..390cee7e61a 100644
--- a/drivers/net/wireless/wl12xx/wl1251_main.c
+++ b/drivers/net/wireless/wl12xx/wl1251_main.c
@@ -1195,6 +1195,66 @@ 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;
@@ -1241,6 +1301,9 @@ 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;