qcacmn: Translate radar params for true 160Mhz devices

In chipsets that support true 160MHz (single synthesizer),
the radar parameters received from target are different from Hawkeye
based chipsets in which two synthesizers, each 80Mhz,
produce 160Mhz signal.

The segment ID received in true 160MHz chipsets is always 0 and the
frequency offset is with respect to the center of 160MHz; unlike in
Hawkeye where segment IDs can be 0 (primary) or 1 (secondary) and
the frequency offset received is with respect to the corresponding
frequency centers (of the segment ID received).

Hence, to be able to use the same radar found algorithm as used in
Hawkeye, add a translation/mapping API that will translate new
parameters to old equivalents.

CRs-Fixed: 2633062
Change-Id: I37ad1db4ca71231119cf547abb9a8a70577cc6a4

umac/dfs/core/src/misc/dfs_process_radar_found_ind.c

@@ -389,6 +389,13 @@ dfs_compute_radar_found_cfreq(struct wlan_dfs *dfs,
 	if (radar_found->detector_id == dfs_get_agile_detector_id(dfs)) {
 		*freq_center = utils_dfs_chan_to_freq(
 				dfs->dfs_agile_precac_freq);
+		if (dfs->dfs_precac_chwidth == CH_WIDTH_160MHZ ||
+		    dfs->dfs_precac_chwidth == CH_WIDTH_80P80MHZ) {
+			if (radar_found->segment_id == PRIMARY_SEG)
+				*freq_center -= DFS_160MHZ_SECOND_SEG_OFFSET;
+			else
+				*freq_center += DFS_160MHZ_SECOND_SEG_OFFSET;
+		}
        /* Radar found on primary segment by the HW. */
 	} else if (radar_found->segment_id == PRIMARY_SEG) {
 		*freq_center = utils_dfs_chan_to_freq(
@@ -944,6 +951,99 @@ bool dfs_process_nol_ie_bitmap(struct wlan_dfs *dfs, uint8_t nol_ie_bandwidth,
 }
 #endif
 
+#ifdef WLAN_DFS_TRUE_160MHZ_SUPPORT
+#define DFS_80P80MHZ_SECOND_SEG_OFFSET 85
+/**
+ * dfs_translate_radar_params() - Translate the radar parameters received in
+ *                                true 160MHz supported chipsets.
+ * @dfs: Pointer to the wlan_dfs object.
+ * @radar_found: Radar found parameters.
+ *
+ * Radar found parameters in true 160MHz detectors are represented below:
+ *
+ * Offset received with respect to the center of 160MHz ranging from -80 to +80.
+ *          __________________________________________
+ *         |                                          |
+ *         |             160 MHz Channel              |
+ *         |__________________________________________|
+ *         |        |           |           |         |
+ *         |        |           |           |         |
+ *        -80    -ve offset   center    +ve offset   +80
+ *
+ *
+ * Radar found parameters after translation by this API:
+ *
+ * Offsets with respect to pri/sec 80MHz center ranging from -40 to +40.
+ *          __________________________________________
+ *         |                    |                     |
+ *         |             160 MHz|Channel              |
+ *         |____________________|_____________________|
+ *         |         |          |           |         |
+ *         |         |          |           |         |
+ *        -40    pri center  +40/-40     sec center  +40
+ *
+ * Return: void.
+ */
+static void
+dfs_translate_radar_params(struct wlan_dfs *dfs,
+			   struct radar_found_info *radar_found)
+{
+	struct dfs_channel *curchan = dfs->dfs_curchan;
+	bool is_primary_ch_right_of_center = false;
+
+	if (!dfs_is_true_160mhz_supported(dfs))
+		return;
+
+	/* Is the primary channel ( or primary 80 segment) to the right
+	 * of the center of 160/165Mhz channel.
+	 */
+	if (curchan->dfs_ch_freq > curchan->dfs_ch_mhz_freq_seg2)
+		is_primary_ch_right_of_center = true;
+
+	if (WLAN_IS_CHAN_MODE_160(curchan)) {
+		if (radar_found->freq_offset > 0) {
+			/* Offset positive: Equivalent to Upper IEEE
+			 * 80Mhz chans Synthesizer.
+			 */
+			if (!is_primary_ch_right_of_center)
+				radar_found->segment_id = SEG_ID_SECONDARY;
+			radar_found->freq_offset -=
+				DFS_160MHZ_SECOND_SEG_OFFSET;
+		} else {
+			/* Offset negative: Equivalent to Lower IEEE
+			 * 80Mhz chans Synthesizer.
+			 */
+			if (is_primary_ch_right_of_center)
+				radar_found->segment_id = SEG_ID_SECONDARY;
+			radar_found->freq_offset +=
+				DFS_160MHZ_SECOND_SEG_OFFSET;
+		}
+	} else if (WLAN_IS_CHAN_MODE_165(dfs, curchan)) {
+		/* If offset is greater than 40MHz, radar is found on the
+		 * secondary segment.
+		 */
+		if (abs(radar_found->freq_offset) > 40) {
+			radar_found->segment_id = SEG_ID_SECONDARY;
+			/* Update the freq. offset with respect to the
+			 * secondary segment center freq.
+			 */
+			if (is_primary_ch_right_of_center)
+				radar_found->freq_offset +=
+					DFS_80P80MHZ_SECOND_SEG_OFFSET;
+			else
+				radar_found->freq_offset -=
+					DFS_80P80MHZ_SECOND_SEG_OFFSET;
+		}
+	}
+}
+#else
+static inline void
+dfs_translate_radar_params(struct wlan_dfs *dfs,
+			   struct radar_found_info *radar_found)
+{
+}
+#endif /* WLAN_DFS_TRUE_160MHZ_SUPPORT */
+
 #ifdef CONFIG_CHAN_FREQ_API
 QDF_STATUS dfs_process_radar_ind(struct wlan_dfs *dfs,
 				 struct radar_found_info *radar_found)
@@ -963,6 +1063,7 @@ QDF_STATUS dfs_process_radar_ind(struct wlan_dfs *dfs,
 	 */
 	DFS_RADAR_MODE_SWITCH_LOCK(dfs);
 
+	dfs_translate_radar_params(dfs, radar_found);
 	/* Before processing radar, check if HW mode switch is in progress.
 	 * If in progress, defer the processing of radar event received till
 	 * the mode switch is completed.