From: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx>
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 <mohammed@xxxxxxxxxxxxxxxx>
---
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
