fix(nimble) Add VSC for Set Scan Channel Bitmap for esp32c2

nimble/host/include/host/ble_esp_gap.h

@@ -262,6 +262,23 @@ int ble_gap_clear_legacy_adv(void);
  */
 int ble_gap_set_chan_select(uint8_t select);
 
+/**
+ * This API is used to Set scan channel bitmap for scan/init.
+ *
+ * Currently supported only for ESP32C2 chipset.
+ *
+ * @param state         0:Scanning
+ *                      1:Initiating
+ *
+ * @param bitmap[5]     Represents 5 byte channel bitmap. Bit 37,38 and 39 set to
+ *                      represent primary channels, enabled by default.
+ *
+ *                      Bit 39 refers to MSb of MSB of 5-byte bitmap
+ *
+ * @return              status, 0 on success; nonzero on failure.
+ */
+int ble_gap_set_scan_chan(uint8_t state, uint8_t *bitmap);
+
 #endif
 
 /**

nimble/host/src/ble_gap.c

@@ -9403,6 +9403,18 @@ int ble_gap_set_chan_select(uint8_t select)
      return ble_hs_hci_send_vs_cmd(BLE_HCI_OCF_VS_SET_CHAN_SELECT,
                             &select, 1, NULL, 0);
 }
+
+int ble_gap_set_scan_chan(uint8_t state, uint8_t *bitmap)
+{
+    uint8_t vs_cmd[6];
+    memset(vs_cmd, 0x0, sizeof(vs_cmd));
+
+    vs_cmd[0] = state;
+    memcpy(&vs_cmd[1], bitmap, 5);
+
+    return ble_hs_hci_send_vs_cmd(BLE_HCI_OCF_VS_SET_SCAN_CHAN,
+		           &vs_cmd, sizeof(vs_cmd), NULL, 0);
+}
 #endif
 
 int

nimble/include/nimble/hci_common.h

@@ -1384,6 +1384,9 @@ struct ble_hci_vs_duplicate_exception_list_cp {
 #define BLE_HCI_OCF_VS_SET_CHAN_SELECT                  (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x0112))
 
 #define BLE_HCI_OCF_VS_SET_EVT_MASK                     (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x0116))
+
+#define BLE_HCI_OCF_VS_SET_SCAN_CHAN                    (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x0119))
+
 struct ble_hci_vs_set_event_mask_cp {
     uint32_t event_mask;
 } __attribute__((packed));