qcacmn: Add an API wlan_reg_chan_opclass_to_freq

Add an API wlan_reg_chan_opclass_to_freq, that takes IEEE Channel
number and opclass as input and gives the channel center frequency
as output.

Change-Id: I09733d9dc27beb8f16037aa8653acededf32b715
CRs-Fixed: 2555042

umac/regulatory/core/src/reg_opclass.c

@@ -504,4 +504,48 @@ uint16_t reg_get_op_class_width(struct wlan_objmgr_pdev *pdev,
 	return 0;
 }
 
+uint16_t reg_chan_opclass_to_freq(uint8_t chan,
+				  uint8_t op_class,
+				  bool global_tbl_lookup)
+{
+	const struct reg_dmn_op_class_map_t *op_class_tbl = NULL;
+	uint8_t i = 0;
+
+	if (global_tbl_lookup) {
+		op_class_tbl = global_op_class;
+	} else {
+		if (channel_map == channel_map_global) {
+			op_class_tbl = global_op_class;
+		} else if (channel_map == channel_map_us) {
+			op_class_tbl = us_op_class;
+		} else if (channel_map == channel_map_eu) {
+			op_class_tbl = euro_op_class;
+		} else if (channel_map == channel_map_china) {
+			op_class_tbl = us_op_class;
+		} else if (channel_map == channel_map_jp) {
+			op_class_tbl = japan_op_class;
+		} else {
+			reg_err_rl("Invalid channel map");
+			return 0;
+		}
+	}
+
+	while (op_class_tbl->op_class) {
+		if  (op_class_tbl->op_class == op_class) {
+			for (i = 0; (i < REG_MAX_CHANNELS_PER_OPERATING_CLASS &&
+				     op_class_tbl->channels[i]); i++) {
+				if (op_class_tbl->channels[i] == chan) {
+					chan = op_class_tbl->channels[i];
+					return (op_class_tbl->start_freq +
+						(chan * FREQ_TO_CHAN_SCALE));
+				}
+			}
+			reg_err_rl("Channel not found");
+			return 0;
+		}
+		op_class_tbl++;
+	}
+	reg_err_rl("Invalid opclass given as input");
+	return 0;
+}
 #endif

umac/regulatory/core/src/reg_opclass.h

@@ -129,6 +129,17 @@ uint16_t reg_get_op_class_width(struct wlan_objmgr_pdev *pdev,
 				uint8_t op_class,
 				bool global_tbl_lookup);
 
+/**
+ * reg_chan_opclass_to_freq() - Convert channel number and opclass to frequency
+ * @chan: IEEE Channel Number.
+ * @op_class: Opclass.
+ * @global_tbl_lookup: Global table lookup.
+ *
+ * Return: Channel center frequency else return 0.
+ */
+uint16_t reg_chan_opclass_to_freq(uint8_t chan,
+				  uint8_t op_class,
+				  bool global_tbl_lookup);
 #else
 
 static inline uint16_t reg_dmn_get_chanwidth_from_opclass(
@@ -192,5 +203,13 @@ uint16_t reg_get_op_class_width(struct wlan_objmgr_pdev *pdev,
 	return 0;
 }
 
+static inline uint16_t
+reg_chan_opclass_to_freq(uint8_t chan,
+			 uint8_t op_class,
+			 bool global_tbl_lookup)
+{
+	return 0;
+}
+
 #endif
 #endif

umac/regulatory/dispatcher/inc/wlan_reg_services_api.h

@@ -1174,4 +1174,15 @@ bool wlan_reg_is_6ghz_op_class(struct wlan_objmgr_pdev *pdev,
  */
 bool wlan_reg_is_6ghz_supported(struct wlan_objmgr_pdev *pdev);
 
+/**
+ * reg_chan_opclass_to_freq() - Convert channel number and opclass to frequency
+ * @chan: IEEE Channel Number.
+ * @op_class: Opclass.
+ * @global_tbl_lookup: Global table lookup.
+ *
+ * Return: Channel center frequency else return 0.
+ */
+uint16_t wlan_reg_chan_opclass_to_freq(uint8_t chan,
+				       uint8_t op_class,
+				       bool global_tbl_lookup);
 #endif

umac/regulatory/dispatcher/src/wlan_reg_services_api.c

@@ -1023,3 +1023,13 @@ bool wlan_reg_is_6ghz_supported(struct wlan_objmgr_pdev *pdev)
 {
 	return reg_is_6ghz_supported(pdev);
 }
+
+uint16_t wlan_reg_chan_opclass_to_freq(uint8_t chan,
+				       uint8_t op_class,
+				       bool global_tbl_lookup)
+{
+	if (!chan || !op_class)
+		return 0;
+
+	return reg_chan_opclass_to_freq(chan, op_class, global_tbl_lookup);
+}