rt2x00: Initialize AMPDU_BA_WINSIZE register

Since we're not using the AMPDU_BA_WINSIZE register to force the BlockAck
window size (we specify it in every TXWI) we should initialize it to 0.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
index 70a5cb86405..2edc7742a7e 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -639,6 +639,18 @@
 #define LED_CFG_LED_POLAR               FIELD32(0x40000000)
 
 /*
+ * AMPDU_BA_WINSIZE: Force BlockAck window size
+ * FORCE_WINSIZE_ENABLE:
+ *   0: Disable forcing of BlockAck window size
+ *   1: Enable forcing of BlockAck window size, overwrites values BlockAck
+ *      window size values in the TXWI
+ * FORCE_WINSIZE: BlockAck window size
+ */
+#define AMPDU_BA_WINSIZE                0x1040
+#define AMPDU_BA_WINSIZE_FORCE_WINSIZE_ENABLE FIELD32(0x00000020)
+#define AMPDU_BA_WINSIZE_FORCE_WINSIZE  FIELD32(0x0000001f)
+
+/*
  * XIFS_TIME_CFG: MAC timing
  * CCKM_SIFS_TIME: unit 1us. Applied after CCK RX/TX
  * OFDM_SIFS_TIME: unit 1us. Applied after OFDM RX/TX
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index f90e932b3cb..78e5830c86c 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2053,6 +2053,14 @@ static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
         rt2800_register_write(rt2x00dev, LG_FBK_CFG1, reg);
 
         /*
+         * Do not force the BA window size, we use the TXWI to set it
+         */
+        rt2800_register_read(rt2x00dev, AMPDU_BA_WINSIZE, &reg);
+        rt2x00_set_field32(&reg, AMPDU_BA_WINSIZE_FORCE_WINSIZE_ENABLE, 0);
+        rt2x00_set_field32(&reg, AMPDU_BA_WINSIZE_FORCE_WINSIZE, 0);
+        rt2800_register_write(rt2x00dev, AMPDU_BA_WINSIZE, reg);
+
+        /*
          * We must clear the error counters.
          * These registers are cleared on read,
          * so we may pass a useless variable to store the value.