X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=target_firmware%2Fwlan%2Fif_ath.c;h=bea411a58112ec4f5dd1906ea8a61f46f9a9d4ec;hb=24b5105e0730aaeffb8a7b0b6b0d93eec6190b86;hp=6a887126e446bdb8c9367671d50ade70105395f8;hpb=0421b61b6a02eb61eaea125641ba69002d76ecf2;p=open-ath9k-htc-firmware.git

diff --git a/target_firmware/wlan/if_ath.c b/target_firmware/wlan/if_ath.c
index 6a88712..bea411a 100755
--- a/target_firmware/wlan/if_ath.c
+++ b/target_firmware/wlan/if_ath.c
@@ -56,6 +56,8 @@
 #include "if_athvar.h"
 #include "ah_desc.h"
 #include "ah.h"
+#include "ratectrl.h"
+#include "ah_internal.h"
 
 static a_int32_t ath_numrxbufs = -1;
 static a_int32_t ath_numrxdescs = -1;
@@ -82,26 +84,36 @@ void ath_tgt_tx_sched_normal(struct ath_softc_tgt *sc, struct ath_buf *bf);
 void ath_tgt_tx_sched_nonaggr(struct ath_softc_tgt *sc,struct ath_buf * bf_host);
 
 /*
- * Extend a 32 bit TSF to 64 bit, taking wrapping into account.
+ * Extend a 32 bit TSF to nearest 64 bit TSF value.
+ * When the adapter is a STATION, its local TSF is periodically modified by
+ * the hardware to match the BSS TSF (as received in beacon packets), and
+ * rstamp may appear to be from the future or from the past (with reference
+ * to the current local TSF) because of jitter. This is mostly noticable in
+ * highly congested channels. The code uses signed modulo arithmetic to
+ * handle both past/future cases and signed-extension to avoid branches.
+ * Test cases:
+ * extend(0x0000001200000004, 0x00000006) == 0x0000001200000006
+ * extend(0x0000001200000004, 0x00000002) == 0x0000001200000002
+ * extend(0x0000001200000004, 0xfffffffe) == 0x00000011fffffffe  ! tsfhigh--
+ * extend(0x000000127ffffffe, 0x80000002) == 0x0000001280000002
+ * extend(0x0000001280000002, 0x7ffffffe) == 0x000000127ffffffe
+ * extend(0x00000012fffffffc, 0xfffffffe) == 0x00000012fffffffe
+ * extend(0x00000012fffffffc, 0xfffffffa) == 0x00000012fffffffa
+ * extend(0x00000012fffffffc, 0x00000002) == 0x0000001300000002  ! tsfhigh++
  */
 static u_int64_t ath_extend_tsf(struct ath_softc_tgt *sc, u_int32_t rstamp)
 {
 	struct ath_hal *ah = sc->sc_ah;
 	u_int64_t tsf;
 	u_int32_t tsf_low;
-	u_int64_t tsf64;
+	a_int64_t tsf_delta;  /* signed int64 */
 
 	tsf = ah->ah_getTsf64(ah);
-	tsf_low = tsf & 0xffffffff;
-	tsf64 = (tsf & ~0xffffffffULL) | rstamp;
+	tsf_low = tsf & 0xffffffffUL;
 
-	if (rstamp > tsf_low && (rstamp - tsf_low > 0x10000000))
-		tsf64 -= 0x100000000ULL;
+	tsf_delta = (a_int32_t)((rstamp - tsf_low) & 0xffffffffUL);
 
-	if (rstamp < tsf_low && (tsf_low - rstamp > 0x10000000))
-		tsf64 += 0x100000000ULL;
-
-	return tsf64;
+	return (tsf + (u_int64_t)tsf_delta);
 }
 
 static a_int32_t ath_rate_setup(struct ath_softc_tgt *sc, a_uint32_t mode)
@@ -1391,7 +1403,7 @@ static a_int32_t ath_reg_read_filter(struct ath_hal *ah, a_int32_t addr)
 		return ioread32_mac(0x407c) & 0x0000ffff;
 	} else if (addr > 0xffff)
 		/* SoC registers */
-		return HAL_WORD_REG_READ(addr);
+		return ioread32(addr);
 	else
 		/* MAC registers */
 		return ioread32_mac(addr);
@@ -1424,19 +1436,19 @@ static void ath_pll_reset_ones(struct ath_hal *ah)
 	if(reset_pll == 0) {
 #if defined(PROJECT_K2)
 		/* here we write to core register */
-		HAL_WORD_REG_WRITE(MAGPIE_REG_RST_PWDN_CTRL_ADDR, 0x0);
+		iowrite32(MAGPIE_REG_RST_PWDN_CTRL_ADDR, 0x0);
 		/* and here to mac register */
-		ath_hal_reg_write_target(ah, 0x786c,
+		iowrite32_mac(0x786c,
 			 ioread32_mac(0x786c) | 0x6000000);
-		ath_hal_reg_write_target(ah, 0x786c,
+		iowrite32_mac(0x786c,
 			 ioread32_mac(0x786c) & (~0x6000000));
 
-		HAL_WORD_REG_WRITE(MAGPIE_REG_RST_PWDN_CTRL_ADDR, 0x20);
+		iowrite32(MAGPIE_REG_RST_PWDN_CTRL_ADDR, 0x20);
 
 #elif defined(PROJECT_MAGPIE) && !defined (FPGA)
-		ath_hal_reg_write_target(ah, 0x7890,
+		iowrite32_mac(0x7890,
 			 ioread32_mac(0x7890) | 0x1800000);
-		ath_hal_reg_write_target(ah, 0x7890,
+		iowrite32_mac(0x7890,
 			 ioread32_mac(0x7890) & (~0x1800000));
 #endif
 		reset_pll = 1;
@@ -1447,7 +1459,7 @@ static void ath_hal_reg_write_filter(struct ath_hal *ah,
 			a_uint32_t reg, a_uint32_t val)
 {
 	if(reg > 0xffff) {
-		HAL_WORD_REG_WRITE(reg, val);
+		iowrite32(reg, val);
 #if defined(PROJECT_K2)
 		if(reg == 0x50040) {
 			static uint8_t flg=0;
@@ -1466,7 +1478,7 @@ static void ath_hal_reg_write_filter(struct ath_hal *ah,
 		if(reg == 0x7014)
 			ath_pll_reset_ones(ah);
 
-		ath_hal_reg_write_target(ah, reg, val);
+		iowrite32_mac(reg, val);
 	}
 }