openwrt/package/kernel/mac80211/patches/309-ath10k-fix-CCK-h-w-rates-for-QCA99X0-and-newer-chips.patch

From: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Date: Thu, 2 Jun 2016 19:54:42 +0530
Subject: [PATCH] ath10k: fix CCK h/w rates for QCA99X0 and newer chipsets

CCK hardware table mapping from QCA99X0 onwards got revised.
The CCK hardware rate values are in a proper order wrt. to
rate and preamble as below

ATH10K_HW_RATE_REV2_CCK_LP_1M = 1,
ATH10K_HW_RATE_REV2_CCK_LP_2M = 2,
ATH10K_HW_RATE_REV2_CCK_LP_5_5M = 3,
ATH10K_HW_RATE_REV2_CCK_LP_11M = 4,
ATH10K_HW_RATE_REV2_CCK_SP_2M = 5,
ATH10K_HW_RATE_REV2_CCK_SP_5_5M = 6,
ATH10K_HW_RATE_REV2_CCK_SP_11M = 7,

This results in reporting of rx frames (with CCK rates)
totally wrong for QCA99X0, QCA4019. Fix this by having
separate CCK rate table for these chipsets with rev2 suffix
and registering the correct rate mapping to mac80211 based on
the new hw_param (introduced) 'cck_rate_map_rev2' which shall
be true for any newchipsets from QCA99X0 onwards

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
---

--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -148,6 +148,8 @@ static const struct ath10k_hw_params ath
 		.uart_pin = 7,
 		.otp_exe_param = 0x00000700,
 		.continuous_frag_desc = true,
+		.cck_rate_map_rev2 = true,
+		.cck_rate_map_rev2 = true,
 		.channel_counters_freq_hz = 150000,
 		.max_probe_resp_desc_thres = 24,
 		.hw_4addr_pad = ATH10K_HW_4ADDR_PAD_BEFORE,
@@ -205,6 +207,7 @@ static const struct ath10k_hw_params ath
 		.has_shifted_cc_wraparound = true,
 		.otp_exe_param = 0x0010000,
 		.continuous_frag_desc = true,
+		.cck_rate_map_rev2 = true,
 		.channel_counters_freq_hz = 125000,
 		.max_probe_resp_desc_thres = 24,
 		.hw_4addr_pad = ATH10K_HW_4ADDR_PAD_BEFORE,
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -716,6 +716,12 @@ struct ath10k {
 		 */
 		bool continuous_frag_desc;
 
+		/* CCK hardware rate table mapping for the newer chipsets
+		 * like QCA99X0, QCA4019 got revised. The CCK h/w rate values
+		 * are in a proper order with respect to the rate/preamble
+		 */
+		bool cck_rate_map_rev2;
+
 		u32 channel_counters_freq_hz;
 
 		/* Mgmt tx descriptors threshold for limiting probe response
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -315,6 +315,16 @@ enum ath10k_hw_rate_cck {
 	ATH10K_HW_RATE_CCK_SP_2M,
 };
 
+enum ath10k_hw_rate_rev2_cck {
+	ATH10K_HW_RATE_REV2_CCK_LP_1M = 1,
+	ATH10K_HW_RATE_REV2_CCK_LP_2M,
+	ATH10K_HW_RATE_REV2_CCK_LP_5_5M,
+	ATH10K_HW_RATE_REV2_CCK_LP_11M,
+	ATH10K_HW_RATE_REV2_CCK_SP_2M,
+	ATH10K_HW_RATE_REV2_CCK_SP_5_5M,
+	ATH10K_HW_RATE_REV2_CCK_SP_11M,
+};
+
 enum ath10k_hw_4addr_pad {
 	ATH10K_HW_4ADDR_PAD_AFTER,
 	ATH10K_HW_4ADDR_PAD_BEFORE,
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -62,6 +62,32 @@ static struct ieee80211_rate ath10k_rate
 	{ .bitrate = 540, .hw_value = ATH10K_HW_RATE_OFDM_54M },
 };
 
+static struct ieee80211_rate ath10k_rates_rev2[] = {
+	{ .bitrate = 10,
+	  .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_1M },
+	{ .bitrate = 20,
+	  .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_2M,
+	  .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_2M,
+	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 55,
+	  .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_5_5M,
+	  .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_5_5M,
+	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 110,
+	  .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_11M,
+	  .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_11M,
+	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+
+	{ .bitrate = 60, .hw_value = ATH10K_HW_RATE_OFDM_6M },
+	{ .bitrate = 90, .hw_value = ATH10K_HW_RATE_OFDM_9M },
+	{ .bitrate = 120, .hw_value = ATH10K_HW_RATE_OFDM_12M },
+	{ .bitrate = 180, .hw_value = ATH10K_HW_RATE_OFDM_18M },
+	{ .bitrate = 240, .hw_value = ATH10K_HW_RATE_OFDM_24M },
+	{ .bitrate = 360, .hw_value = ATH10K_HW_RATE_OFDM_36M },
+	{ .bitrate = 480, .hw_value = ATH10K_HW_RATE_OFDM_48M },
+	{ .bitrate = 540, .hw_value = ATH10K_HW_RATE_OFDM_54M },
+};
+
 #define ATH10K_MAC_FIRST_OFDM_RATE_IDX 4
 
 #define ath10k_a_rates (ath10k_rates + ATH10K_MAC_FIRST_OFDM_RATE_IDX)
@@ -70,6 +96,9 @@ static struct ieee80211_rate ath10k_rate
 #define ath10k_g_rates (ath10k_rates + 0)
 #define ath10k_g_rates_size (ARRAY_SIZE(ath10k_rates))
 
+#define ath10k_g_rates_rev2 (ath10k_rates_rev2 + 0)
+#define ath10k_g_rates_rev2_size (ARRAY_SIZE(ath10k_rates_rev2))
+
 static bool ath10k_mac_bitrate_is_cck(int bitrate)
 {
 	switch (bitrate) {
@@ -7720,8 +7749,14 @@ int ath10k_mac_register(struct ath10k *a
 		band = &ar->mac.sbands[NL80211_BAND_2GHZ];
 		band->n_channels = ARRAY_SIZE(ath10k_2ghz_channels);
 		band->channels = channels;
-		band->n_bitrates = ath10k_g_rates_size;
-		band->bitrates = ath10k_g_rates;
+
+		if (ar->hw_params.cck_rate_map_rev2) {
+			band->n_bitrates = ath10k_g_rates_rev2_size;
+			band->bitrates = ath10k_g_rates_rev2;
+		} else {
+			band->n_bitrates = ath10k_g_rates_size;
+			band->bitrates = ath10k_g_rates;
+		}
 
 		ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = band;
 	}