From: Igor Perminov Date: Sun, 9 Aug 2009 22:58:54 +0000 (+0200) Subject: rt2x00: Fix beacon de-synchronization while update beacon X-Git-Tag: v2.6.32-rc1~703^2~367^2~44 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d6756d0dc220c3d12e2c4c06ca97d1dbcb5edf4e;p=karo-tx-linux.git rt2x00: Fix beacon de-synchronization while update beacon When beacon is being updated to refresh TIM (AP mode), beacon frames are de-synchronizing (i.e. two neighbor beacon frames - before and after update - are being transmitted with a wrong time interval). That is because xxx_write_beacon should disable beacon generation only while beacon data are being uploaded to the device, but it should not disable the beacon clock. Signed-off-by: Igor Perminov Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 30185ad28d93..164df9347a2f 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -1069,8 +1069,6 @@ static void rt2400pci_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2x00pci_register_read(rt2x00dev, CSR14, ®); - rt2x00_set_field32(®, CSR14_TSF_COUNT, 0); - rt2x00_set_field32(®, CSR14_TBCN, 0); rt2x00_set_field32(®, CSR14_BEACON_GEN, 0); rt2x00pci_register_write(rt2x00dev, CSR14, reg); diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c index 3b3171578b14..4186582f2770 100644 --- a/drivers/net/wireless/rt2x00/rt2500pci.c +++ b/drivers/net/wireless/rt2x00/rt2500pci.c @@ -1227,8 +1227,6 @@ static void rt2500pci_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2x00pci_register_read(rt2x00dev, CSR14, ®); - rt2x00_set_field32(®, CSR14_TSF_COUNT, 0); - rt2x00_set_field32(®, CSR14_TBCN, 0); rt2x00_set_field32(®, CSR14_BEACON_GEN, 0); rt2x00pci_register_write(rt2x00dev, CSR14, reg); diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c index de48c5c68eff..09a589432dab 100644 --- a/drivers/net/wireless/rt2x00/rt2500usb.c +++ b/drivers/net/wireless/rt2x00/rt2500usb.c @@ -1238,8 +1238,6 @@ static void rt2500usb_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2500usb_register_read(rt2x00dev, TXRX_CSR19, ®); - rt2x00_set_field16(®, TXRX_CSR19_TSF_COUNT, 0); - rt2x00_set_field16(®, TXRX_CSR19_TBCN, 0); rt2x00_set_field16(®, TXRX_CSR19_BEACON_GEN, 0); rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg); @@ -1287,7 +1285,7 @@ static int rt2500usb_get_tx_data_len(struct queue_entry *entry) static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, const enum data_queue_qid queue) { - u16 reg; + u16 reg, reg0; if (queue != QID_BEACON) { rt2x00usb_kick_tx_queue(rt2x00dev, queue); @@ -1298,16 +1296,19 @@ static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, if (!rt2x00_get_field16(reg, TXRX_CSR19_BEACON_GEN)) { rt2x00_set_field16(®, TXRX_CSR19_TSF_COUNT, 1); rt2x00_set_field16(®, TXRX_CSR19_TBCN, 1); + reg0 = reg; rt2x00_set_field16(®, TXRX_CSR19_BEACON_GEN, 1); /* * Beacon generation will fail initially. - * To prevent this we need to register the TXRX_CSR19 - * register several times. + * To prevent this we need to change the TXRX_CSR19 + * register several times (reg0 is the same as reg + * except for TXRX_CSR19_BEACON_GEN, which is 0 in reg0 + * and 1 in reg). */ rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg); - rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0); + rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg0); rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg); - rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0); + rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg0); rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg); } } diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c index 2de0389d823d..3856f06fdca7 100644 --- a/drivers/net/wireless/rt2x00/rt2800usb.c +++ b/drivers/net/wireless/rt2x00/rt2800usb.c @@ -2050,8 +2050,6 @@ static void rt2800usb_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, ®); - rt2x00_set_field32(®, BCN_TIME_CFG_TSF_TICKING, 0); - rt2x00_set_field32(®, BCN_TIME_CFG_TBTT_ENABLE, 0); rt2x00_set_field32(®, BCN_TIME_CFG_BEACON_GEN, 0); rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg); diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c index 3447997fc71a..f4b4b86da4da 100644 --- a/drivers/net/wireless/rt2x00/rt61pci.c +++ b/drivers/net/wireless/rt2x00/rt61pci.c @@ -1855,8 +1855,6 @@ static void rt61pci_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2x00pci_register_read(rt2x00dev, TXRX_CSR9, ®); - rt2x00_set_field32(®, TXRX_CSR9_TSF_TICKING, 0); - rt2x00_set_field32(®, TXRX_CSR9_TBTT_ENABLE, 0); rt2x00_set_field32(®, TXRX_CSR9_BEACON_GEN, 0); rt2x00pci_register_write(rt2x00dev, TXRX_CSR9, reg); diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c index 4b9955b1c70e..4d94b65943f1 100644 --- a/drivers/net/wireless/rt2x00/rt73usb.c +++ b/drivers/net/wireless/rt2x00/rt73usb.c @@ -1527,8 +1527,6 @@ static void rt73usb_write_beacon(struct queue_entry *entry) * otherwise we might be sending out invalid data. */ rt2x00usb_register_read(rt2x00dev, TXRX_CSR9, ®); - rt2x00_set_field32(®, TXRX_CSR9_TSF_TICKING, 0); - rt2x00_set_field32(®, TXRX_CSR9_TBTT_ENABLE, 0); rt2x00_set_field32(®, TXRX_CSR9_BEACON_GEN, 0); rt2x00usb_register_write(rt2x00dev, TXRX_CSR9, reg);