Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:29141 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753744AbdDJOWl (ORCPT ); Mon, 10 Apr 2017 10:22:41 -0400 From: Mohammed Shafi Shajakhan To: CC: , , "Mohammed Shafi Shajakhan" Subject: [PATCH] ath10k: Fix spectral scan for QCA99X0 family of chipsets Date: Mon, 10 Apr 2017 19:56:14 +0530 Message-ID: <1491834374-25239-1-git-send-email-mohammed@qca.qualcomm.com> (sfid-20170410_162254_327082_009CA871) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Mohammed Shafi Shajakhan spectral_bin length (number of bins per fft sample) is usually a value where (2^n = value), n is an integer. All of the QCA99X0 family of chipsets seems to report a spectral_bin length of 2^n + 'm' bytes, where m = 4, 12 based on the chipset. This 'm' bytes seems to carry some radar related info which is currenly discarded only for 'bin_len = 68' bytes. Extend this discarding of irrelevant 'bin_len' for QCA9984, QCA9888, IPQ4019 as well by introducing a hardware parameter 'spectral_bin_discard'. Also for QCA988X based family of chipsets which doesn't seem to have this issue and also for some of the hardware which I have not tested like QCA6174/QCA9377 the existing behaviour is retained as it is. Signed-off-by: Mohammed Shafi Shajakhan --- drivers/net/wireless/ath/ath10k/core.c | 12 ++++++++++++ drivers/net/wireless/ath/ath10k/hw.h | 3 +++ drivers/net/wireless/ath/ath10k/spectral.c | 25 +++++++++++++++++-------- 3 files changed, 32 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 5736f79..b543c84 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -71,6 +71,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA9887_HW_1_0_VERSION, @@ -91,6 +92,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA6174_HW_2_1_VERSION, @@ -110,6 +112,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA6174_HW_2_1_VERSION, @@ -129,6 +132,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA6174_HW_3_0_VERSION, @@ -148,6 +152,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA6174_HW_3_2_VERSION, @@ -168,6 +173,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA99X0_HW_2_0_DEV_VERSION, @@ -193,6 +199,7 @@ .sw_decrypt_mcast_mgmt = true, .hw_ops = &qca99x0_ops, .decap_align_bytes = 1, + .spectral_bin_discard = 4, }, { .id = QCA9984_HW_1_0_DEV_VERSION, @@ -219,6 +226,7 @@ .sw_decrypt_mcast_mgmt = true, .hw_ops = &qca99x0_ops, .decap_align_bytes = 1, + .spectral_bin_discard = 12, }, { .id = QCA9888_HW_2_0_DEV_VERSION, @@ -244,6 +252,7 @@ .sw_decrypt_mcast_mgmt = true, .hw_ops = &qca99x0_ops, .decap_align_bytes = 1, + .spectral_bin_discard = 12, }, { .id = QCA9377_HW_1_0_DEV_VERSION, @@ -263,6 +272,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA9377_HW_1_1_DEV_VERSION, @@ -282,6 +292,7 @@ }, .hw_ops = &qca988x_ops, .decap_align_bytes = 4, + .spectral_bin_discard = 0, }, { .id = QCA4019_HW_1_0_DEV_VERSION, @@ -308,6 +319,7 @@ .sw_decrypt_mcast_mgmt = true, .hw_ops = &qca99x0_ops, .decap_align_bytes = 1, + .spectral_bin_discard = 4, }, }; diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h index f0fda0f..8a0f9db 100644 --- a/drivers/net/wireless/ath/ath10k/hw.h +++ b/drivers/net/wireless/ath/ath10k/hw.h @@ -416,6 +416,9 @@ struct ath10k_hw_params { /* Number of bytes used for alignment in rx_hdr_status of rx desc. */ int decap_align_bytes; + + /* Number of bytes to be discarded for each FFT sample */ + int spectral_bin_discard; }; struct htt_rx_desc; diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c index c061d69..3fd5d7d 100644 --- a/drivers/net/wireless/ath/ath10k/spectral.c +++ b/drivers/net/wireless/ath/ath10k/spectral.c @@ -56,6 +56,21 @@ static uint8_t get_max_exp(s8 max_index, u16 max_magnitude, size_t bin_len, return max_exp; } +static inline size_t ath10k_spectral_fix_bin_size(struct ath10k *ar, + size_t bin_len) +{ + /* some chipsets reports bin size as 2^n bytes + 'm' bytes in + * report mode 2. First 2^n bytes carries inband tones and last + * 'm' bytes carries band edge detection data mainly used in + * radar detection purpose. Strip last 'm' bytes to make bin size + * as a valid one. 'm' can take possible values of 4, 12. + */ + if (!is_power_of_2(bin_len)) + bin_len -= ar->hw_params.spectral_bin_discard; + + return bin_len; +} + int ath10k_spectral_process_fft(struct ath10k *ar, struct wmi_phyerr_ev_arg *phyerr, const struct phyerr_fft_report *fftr, @@ -70,17 +85,11 @@ int ath10k_spectral_process_fft(struct ath10k *ar, fft_sample = (struct fft_sample_ath10k *)&buf; + bin_len = ath10k_spectral_fix_bin_size(ar, bin_len); + if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS) return -EINVAL; - /* qca99x0 reports bin size as 68 bytes (64 bytes + 4 bytes) in - * report mode 2. First 64 bytes carries inband tones (-32 to +31) - * and last 4 byte carries band edge detection data (+32) mainly - * used in radar detection purpose. Strip last 4 byte to make bin - * size is valid one. - */ - if (bin_len == 68) - bin_len -= 4; reg0 = __le32_to_cpu(fftr->reg0); reg1 = __le32_to_cpu(fftr->reg1); -- 1.9.1