ath5k: Set all IFS intervals, not just slot time

 * Replace set_slot_time with set_ifs_intervals that also sets
 the various inter-frame space intervals based on current bwmode.

 * Clean up AR5210 mess from reset_tx_queue, AR5210 only has one
 data queue and we set IFS intervals for that queue on set_ifs_intervals
 so there is nothing left to do for 5210 on reset_tx_queue.
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/ath5k.h

@@ -222,34 +222,15 @@
 
 /* Initial values */
 #define	AR5K_INIT_CYCRSSI_THR1			2
-#define AR5K_INIT_TX_LATENCY			502
-#define AR5K_INIT_USEC				39
-#define AR5K_INIT_USEC_TURBO			79
-#define AR5K_INIT_USEC_32			31
-#define AR5K_INIT_SLOT_TIME_CLOCK		396
-#define AR5K_INIT_SLOT_TIME_TURBO_CLOCK		480
-#define AR5K_INIT_ACK_CTS_TIMEOUT		1024
-#define AR5K_INIT_ACK_CTS_TIMEOUT_TURBO		0x08000800
-#define AR5K_INIT_PROG_IFS			920
-#define AR5K_INIT_PROG_IFS_TURBO		960
-#define AR5K_INIT_EIFS				3440
-#define AR5K_INIT_EIFS_TURBO			6880
-#define AR5K_INIT_SIFS_CLOCK			560
-#define AR5K_INIT_SIFS_TURBO_CLOCK		480
+
+/* Tx retry limits */
 #define AR5K_INIT_SH_RETRY			10
 #define AR5K_INIT_LG_RETRY			AR5K_INIT_SH_RETRY
+/* For station mode */
 #define AR5K_INIT_SSH_RETRY			32
 #define AR5K_INIT_SLG_RETRY			AR5K_INIT_SSH_RETRY
 #define AR5K_INIT_TX_RETRY			10
 
-#define AR5K_INIT_PROTO_TIME_CNTRL		(			\
-	(AR5K_INIT_CARR_SENSE_EN << 26) | (AR5K_INIT_EIFS << 12) |	\
-	(AR5K_INIT_PROG_IFS)						\
-)
-#define AR5K_INIT_PROTO_TIME_CNTRL_TURBO	(			\
-	(AR5K_INIT_CARR_SENSE_EN << 26) | (AR5K_INIT_EIFS_TURBO << 12) | \
-	(AR5K_INIT_PROG_IFS_TURBO)					\
-)
 
 /* Slot time */
 #define AR5K_INIT_SLOT_TIME_TURBO		6
@@ -1240,6 +1221,10 @@ int ath5k_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac);
 
 
 /* Protocol Control Unit Functions */
+/* Helpers */
+int ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
+		int len, struct ieee80211_rate *rate);
+unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah);
 extern int ath5k_hw_set_opmode(struct ath5k_hw *ah, enum nl80211_iftype opmode);
 void ath5k_hw_set_coverage_class(struct ath5k_hw *ah, u8 coverage_class);
 /* RX filter control*/
@@ -1273,7 +1258,7 @@ int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah,
 u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue);
 void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue);
 int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue);
-int ath5k_hw_set_slot_time(struct ath5k_hw *ah, unsigned int slot_time);
+int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah, unsigned int slot_time);
 /* Init function */
 int ath5k_hw_init_queues(struct ath5k_hw *ah);
 

drivers/net/wireless/ath/ath5k/pcu.c

@@ -763,7 +763,7 @@ ath5k_hw_check_beacon_timers(struct ath5k_hw *ah, int intval)
  * @ah: The &struct ath5k_hw
  * @coverage_class: IEEE 802.11 coverage class number
  *
- * Sets slot time, ACK timeout and CTS timeout for given coverage class.
+ * Sets IFS intervals and ACK/CTS timeouts for given coverage class.
  */
 void ath5k_hw_set_coverage_class(struct ath5k_hw *ah, u8 coverage_class)
 {
@@ -772,7 +772,7 @@ void ath5k_hw_set_coverage_class(struct ath5k_hw *ah, u8 coverage_class)
 	int ack_timeout = ath5k_hw_get_default_sifs(ah) + slot_time;
 	int cts_timeout = ack_timeout;
 
-	ath5k_hw_set_slot_time(ah, slot_time);
+	ath5k_hw_set_ifs_intervals(ah, slot_time);
 	ath5k_hw_set_ack_timeout(ah, ack_timeout);
 	ath5k_hw_set_cts_timeout(ah, cts_timeout);
 

drivers/net/wireless/ath/ath5k/reg.h

@@ -787,6 +787,7 @@
 #define	AR5K_DCU_GBL_IFS_MISC_LFSR_SLICE	0x00000007	/* LFSR Slice Select */
 #define	AR5K_DCU_GBL_IFS_MISC_TURBO_MODE	0x00000008	/* Turbo mode */
 #define	AR5K_DCU_GBL_IFS_MISC_SIFS_DUR_USEC	0x000003f0	/* SIFS Duration mask */
+#define	AR5K_DCU_GBL_IFS_MISC_SIFS_DUR_USEC_S	4
 #define	AR5K_DCU_GBL_IFS_MISC_USEC_DUR		0x000ffc00	/* USEC Duration mask */
 #define	AR5K_DCU_GBL_IFS_MISC_USEC_DUR_S	10
 #define	AR5K_DCU_GBL_IFS_MISC_DCU_ARB_DELAY	0x00300000	/* DCU Arbiter delay mask */
@@ -1311,7 +1312,7 @@
 #define AR5K_IFS1_EIFS		0x03fff000
 #define AR5K_IFS1_EIFS_S	12
 #define AR5K_IFS1_CS_EN		0x04000000
-
+#define AR5K_IFS1_CS_EN_S	26
 
 /*
  * CFP duration register