ath9k: enable 3-stream and MCS16-23 support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20968 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 64 insertions, 0 deletions

diff --git a/package/mac80211/patches/563-ath9k_bits_per_symbol.patch b/package/mac80211/patches/563-ath9k_bits_per_symbol.patch
new file mode 100644
index 000000000..d842e404d
--- /dev/null
+++ b/package/mac80211/patches/563-ath9k_bits_per_symbol.patch
@@ -0,0 +1,64 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -34,7 +34,7 @@
+ 
+ #define OFDM_SIFS_TIME    	    16
+ 
+-static u32 bits_per_symbol[][2] = {
++static u16 bits_per_symbol[][2] = {
+ 	/* 20MHz 40MHz */
+ 	{    26,   54 },     /*  0: BPSK */
+ 	{    52,  108 },     /*  1: QPSK 1/2 */
+@@ -44,14 +44,6 @@ static u32 bits_per_symbol[][2] = {
+ 	{   208,  432 },     /*  5: 64-QAM 2/3 */
+ 	{   234,  486 },     /*  6: 64-QAM 3/4 */
+ 	{   260,  540 },     /*  7: 64-QAM 5/6 */
+-	{    52,  108 },     /*  8: BPSK */
+-	{   104,  216 },     /*  9: QPSK 1/2 */
+-	{   156,  324 },     /* 10: QPSK 3/4 */
+-	{   208,  432 },     /* 11: 16-QAM 1/2 */
+-	{   312,  648 },     /* 12: 16-QAM 3/4 */
+-	{   416,  864 },     /* 13: 64-QAM 2/3 */
+-	{   468,  972 },     /* 14: 64-QAM 3/4 */
+-	{   520, 1080 },     /* 15: 64-QAM 5/6 */
+ };
+ 
+ #define IS_HT_RATE(_rate)     ((_rate) & 0x80)
+@@ -601,7 +593,7 @@ static int ath_compute_num_delims(struct
+ 	u32 nsymbits, nsymbols;
+ 	u16 minlen;
+ 	u8 flags, rix;
+-	int width, half_gi, ndelim, mindelim;
++	int width, streams, half_gi, ndelim, mindelim;
+ 
+ 	/* Select standard number of delimiters based on frame length alone */
+ 	ndelim = ATH_AGGR_GET_NDELIM(frmlen);
+@@ -641,7 +633,8 @@ static int ath_compute_num_delims(struct
+ 	if (nsymbols == 0)
+ 		nsymbols = 1;
+ 
+-	nsymbits = bits_per_symbol[rix][width];
++	streams = HT_RC_2_STREAMS(rix);
++	nsymbits = bits_per_symbol[rix % 8][width] * streams;
+ 	minlen = (nsymbols * nsymbits) / BITS_PER_BYTE;
+ 
+ 	if (frmlen < minlen) {
+@@ -1533,8 +1526,9 @@ static u32 ath_pkt_duration(struct ath_s
+ 	pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen;
+ 
+ 	/* find number of symbols: PLCP + data */
++	streams = HT_RC_2_STREAMS(rix);
+ 	nbits = (pktlen << 3) + OFDM_PLCP_BITS;
+-	nsymbits = bits_per_symbol[rix][width];
++	nsymbits = bits_per_symbol[rix % 8][width] * streams;
+ 	nsymbols = (nbits + nsymbits - 1) / nsymbits;
+ 
+ 	if (!half_gi)
+@@ -1543,7 +1537,6 @@ static u32 ath_pkt_duration(struct ath_s
+ 		duration = SYMBOL_TIME_HALFGI(nsymbols);
+ 
+ 	/* addup duration for legacy/ht training and signal fields */
+-	streams = HT_RC_2_STREAMS(rix);
+ 	duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
+ 
+ 	return duration;