commit e1b4d7b735c564444d0db668a65c547ad1d29058
author Ivo van Doorn <IvDoorn@gmail.com> Mon Jun 14 22:12:54 2010 +0200
committer John W. Linville <linville@tuxdriver.com> Tue Jun 15 16:00:50 2010 -0400
tree dbdf590d02a39cf8c76c5338ee5a8c7e786e7720
parent 3d2bc1036a64bc015671283833430035f7dbbed0

rt2x00: Enable fallback rates for rt61pci and rt73usb

Explicitly enable the usage of fallback rates for
the transmission of frames with rt61pci and rt73usb hardware.

Note that for txdone reporting, only rt61pci is capable of
reporting the fallback rates, for USB it is not possible
to determine the number of retries. However the device will
use the fallback rates, so it might still help in the performance.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt61pci.c

diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 243df08..d127011 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -931,6 +931,9 @@
 	u32 reg;
 
 	rt2x00pci_register_read(rt2x00dev, TXRX_CSR4, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_RATE_DOWN, 1);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_RATE_STEP, 0);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_FALLBACK_CCK, 0);
 	rt2x00_set_field32(&reg, TXRX_CSR4_LONG_RETRY_LIMIT,
 			   libconf->conf->long_frame_max_tx_count);
 	rt2x00_set_field32(&reg, TXRX_CSR4_SHORT_RETRY_LIMIT,
@@ -2130,6 +2133,13 @@
 		}
 		txdesc.retry = rt2x00_get_field32(reg, STA_CSR4_RETRY_COUNT);
 
+		/*
+		 * the frame was retried at least once
+		 * -> hw used fallback rates
+		 */
+		if (txdesc.retry)
+			__set_bit(TXDONE_FALLBACK, &txdesc.flags);
+
 		rt2x00pci_txdone(entry, &txdesc);
 	}
 }
@@ -2587,6 +2597,18 @@
 						   EEPROM_MAC_ADDR_0));
 
 	/*
+	 * As rt61 has a global fallback table we cannot specify
+	 * more then one tx rate per frame but since the hw will
+	 * try several rates (based on the fallback table) we should
+	 * still initialize max_rates to the maximum number of rates
+	 * we are going to try. Otherwise mac80211 will truncate our
+	 * reported tx rates and the rc algortihm will end up with
+	 * incorrect data.
+	 */
+	rt2x00dev->hw->max_rates = 7;
+	rt2x00dev->hw->max_rate_tries = 1;
+
+	/*
 	 * Initialize hw_mode information.
 	 */
 	spec->supported_bands = SUPPORT_BAND_2GHZ;

drivers/net/wireless/rt2x00/rt73usb.c

diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 113ad69..d06d90f 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -816,6 +816,9 @@
 	u32 reg;
 
 	rt2x00usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_RATE_DOWN, 1);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_RATE_STEP, 0);
+	rt2x00_set_field32(&reg, TXRX_CSR4_OFDM_TX_FALLBACK_CCK, 0);
 	rt2x00_set_field32(&reg, TXRX_CSR4_LONG_RETRY_LIMIT,
 			   libconf->conf->long_frame_max_tx_count);
 	rt2x00_set_field32(&reg, TXRX_CSR4_SHORT_RETRY_LIMIT,