From 3017fcab416d8d1ee48ca16aa9a3062f600dab8e Mon Sep 17 00:00:00 2001 From: Nick Kossifidis Date: Tue, 23 Nov 2010 21:09:11 +0200 Subject: [PATCH] ath5k: Extend get_default_sifs/slot_time * Extend get_default_sifs/slot_time to include timings for turbo half and quarter rate modes. * AR5210 code for now uses timings already on core clock units instead of usecs so rename them (we 'll clean it up later). Signed-off-by: Nick Kossifidis Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/ath5k.h | 24 ++++++++++-- drivers/net/wireless/ath/ath5k/pcu.c | 52 +++++++++++++++++++------- drivers/net/wireless/ath/ath5k/qcu.c | 16 ++++---- 3 files changed, 68 insertions(+), 24 deletions(-) diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h index 005cad025170..e11fc8f39192 100644 --- a/drivers/net/wireless/ath/ath5k/ath5k.h +++ b/drivers/net/wireless/ath/ath5k/ath5k.h @@ -226,16 +226,16 @@ #define AR5K_INIT_USEC 39 #define AR5K_INIT_USEC_TURBO 79 #define AR5K_INIT_USEC_32 31 -#define AR5K_INIT_SLOT_TIME 396 -#define AR5K_INIT_SLOT_TIME_TURBO 480 +#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 560 -#define AR5K_INIT_SIFS_TURBO 480 +#define AR5K_INIT_SIFS_CLOCK 560 +#define AR5K_INIT_SIFS_TURBO_CLOCK 480 #define AR5K_INIT_SH_RETRY 10 #define AR5K_INIT_LG_RETRY AR5K_INIT_SH_RETRY #define AR5K_INIT_SSH_RETRY 32 @@ -251,6 +251,22 @@ (AR5K_INIT_PROG_IFS_TURBO) \ ) +/* Slot time */ +#define AR5K_INIT_SLOT_TIME_TURBO 6 +#define AR5K_INIT_SLOT_TIME_DEFAULT 9 +#define AR5K_INIT_SLOT_TIME_HALF_RATE 13 +#define AR5K_INIT_SLOT_TIME_QUARTER_RATE 21 +#define AR5K_INIT_SLOT_TIME_B 20 +#define AR5K_SLOT_TIME_MAX 0xffff + +/* SIFS */ +#define AR5K_INIT_SIFS_TURBO 6 +/* XXX: 8 from initvals 10 from standard */ +#define AR5K_INIT_SIFS_DEFAULT_BG 8 +#define AR5K_INIT_SIFS_DEFAULT_A 16 +#define AR5K_INIT_SIFS_HALF_RATE 32 +#define AR5K_INIT_SIFS_QUARTER_RATE 64 + /* Rx latency for 5 and 10MHz operation (max ?) */ #define AR5K_INIT_RX_LAT_MAX 63 /* Tx latencies from initvals (5212 only but no problem diff --git a/drivers/net/wireless/ath/ath5k/pcu.c b/drivers/net/wireless/ath/ath5k/pcu.c index 2c2ea1539849..2118f7048f37 100644 --- a/drivers/net/wireless/ath/ath5k/pcu.c +++ b/drivers/net/wireless/ath/ath5k/pcu.c @@ -43,14 +43,27 @@ static unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah) { struct ieee80211_channel *channel = ah->ah_current_channel; + unsigned int slot_time; - if (channel->hw_value & CHANNEL_TURBO) - return 6; /* both turbo modes */ - - if (channel->hw_value & CHANNEL_CCK) - return 20; /* 802.11b */ + switch (ah->ah_bwmode) { + case AR5K_BWMODE_40MHZ: + slot_time = AR5K_INIT_SLOT_TIME_TURBO; + break; + case AR5K_BWMODE_10MHZ: + slot_time = AR5K_INIT_SLOT_TIME_HALF_RATE; + break; + case AR5K_BWMODE_5MHZ: + slot_time = AR5K_INIT_SLOT_TIME_QUARTER_RATE; + break; + case AR5K_BWMODE_DEFAULT: + slot_time = AR5K_INIT_SLOT_TIME_DEFAULT; + default: + if (channel->hw_value & CHANNEL_CCK) + slot_time = AR5K_INIT_SLOT_TIME_B; + break; + } - return 9; /* 802.11 a/g */ + return slot_time; } /** @@ -58,17 +71,30 @@ static unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah) * * @ah: The &struct ath5k_hw */ -static unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah) +unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah) { struct ieee80211_channel *channel = ah->ah_current_channel; + unsigned int sifs; - if (channel->hw_value & CHANNEL_TURBO) - return 8; /* both turbo modes */ - - if (channel->hw_value & CHANNEL_5GHZ) - return 16; /* 802.11a */ + switch (ah->ah_bwmode) { + case AR5K_BWMODE_40MHZ: + sifs = AR5K_INIT_SIFS_TURBO; + break; + case AR5K_BWMODE_10MHZ: + sifs = AR5K_INIT_SIFS_HALF_RATE; + break; + case AR5K_BWMODE_5MHZ: + sifs = AR5K_INIT_SIFS_QUARTER_RATE; + break; + case AR5K_BWMODE_DEFAULT: + sifs = AR5K_INIT_SIFS_DEFAULT_BG; + default: + if (channel->hw_value & CHANNEL_5GHZ) + sifs = AR5K_INIT_SIFS_DEFAULT_A; + break; + } - return 10; /* 802.11 b/g */ + return sifs; } /** diff --git a/drivers/net/wireless/ath/ath5k/qcu.c b/drivers/net/wireless/ath/ath5k/qcu.c index c422d5c92d46..6eb6838d906d 100644 --- a/drivers/net/wireless/ath/ath5k/qcu.c +++ b/drivers/net/wireless/ath/ath5k/qcu.c @@ -297,7 +297,8 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) /* Set Slot time */ ath5k_hw_reg_write(ah, (ah->ah_bwmode == AR5K_BWMODE_40MHZ) ? - AR5K_INIT_SLOT_TIME_TURBO : AR5K_INIT_SLOT_TIME, + AR5K_INIT_SLOT_TIME_TURBO_CLOCK : + AR5K_INIT_SLOT_TIME_CLOCK, AR5K_SLOT_TIME); /* Set ACK_CTS timeout */ ath5k_hw_reg_write(ah, (ah->ah_bwmode == AR5K_BWMODE_40MHZ) ? @@ -306,15 +307,16 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) /* Set IFS0 */ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) { - ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_TURBO + - tq->tqi_aifs * AR5K_INIT_SLOT_TIME_TURBO) << - AR5K_IFS0_DIFS_S) | AR5K_INIT_SIFS_TURBO, + ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_TURBO_CLOCK + + tq->tqi_aifs * AR5K_INIT_SLOT_TIME_TURBO_CLOCK) + << AR5K_IFS0_DIFS_S) | + AR5K_INIT_SIFS_TURBO_CLOCK, AR5K_IFS0); } else { - ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS + - tq->tqi_aifs * AR5K_INIT_SLOT_TIME) << + ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_CLOCK + + tq->tqi_aifs * AR5K_INIT_SLOT_TIME_CLOCK) << AR5K_IFS0_DIFS_S) | - AR5K_INIT_SIFS, AR5K_IFS0); + AR5K_INIT_SIFS_CLOCK, AR5K_IFS0); } /* Set IFS1 */ -- 2.20.1