ath9k: add MAC revision detection for AR9330

The AR9330 1.0 and 1.1 are using the same revision,
thus it is not possible to distinguish the two chips.
The platform setup code can distinguish the chips based
on the SoC revision.

Add a callback function to ath9k_platform_data in order
to allow getting the revision number from the platform code.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index a3881b64f766..9840e0051084 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -251,6 +251,15 @@ static void ath9k_hw_read_revisions(struct ath_hw *ah)
         case AR5416_AR9100_DEVID:
                 ah->hw_version.macVersion = AR_SREV_VERSION_9100;
                 break;
+        case AR9300_DEVID_AR9330:
+                ah->hw_version.macVersion = AR_SREV_VERSION_9330;
+                if (ah->get_mac_revision) {
+                        ah->hw_version.macRev = ah->get_mac_revision();
+                } else {
+                        val = REG_READ(ah, AR_SREV);
+                        ah->hw_version.macRev = MS(val, AR_SREV_REVISION2);
+                }
+                return;
         case AR9300_DEVID_AR9340:
                 ah->hw_version.macVersion = AR_SREV_VERSION_9340;
                 val = REG_READ(ah, AR_SREV);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 14c5857a020c..0749fa8c3a58 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -862,6 +862,7 @@ struct ath_hw {
         u32 ent_mode;
 
         bool is_clk_25mhz;
+        int (*get_mac_revision)(void);
 };
 
 struct ath_bus_ops {
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index d4b166cfdf60..661211291773 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -574,6 +574,7 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
                 sc->sc_ah->gpio_val = pdata->gpio_val;
                 sc->sc_ah->led_pin = pdata->led_pin;
                 ah->is_clk_25mhz = pdata->is_clk_25mhz;
+                ah->get_mac_revision = pdata->get_mac_revision;
         }
 
         common = ath9k_hw_common(ah);
diff --git a/include/linux/ath9k_platform.h b/include/linux/ath9k_platform.h
index 60a7c49dcb49..c207607acada 100644
--- a/include/linux/ath9k_platform.h
+++ b/include/linux/ath9k_platform.h
@@ -30,6 +30,7 @@ struct ath9k_platform_data {
         u32 gpio_val;
 
         bool is_clk_25mhz;
+        int (*get_mac_revision)(void);
 };
 
 #endif /* _LINUX_ATH9K_PLATFORM_H */