component/bt: Allow configuration of default SCO_DATA_PATH in bluetooth controller

components/bt/Kconfig

@@ -53,6 +53,29 @@ config BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN
         BR/EDR Synchronize maximum connections of bluetooth controller.
         Each connection uses 2KB static DRAM whenever the BT controller is enabled.
 
+choice BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH
+    prompt "BR/EDR Sync(SCO/eSCO) default data path"
+    depends on BTDM_CONTROLLER_MODE_BR_EDR_ONLY || BTDM_CONTROLLER_MODE_BTDM
+    default BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_PCM
+    help
+        SCO data path, i.e. HCI or PCM.
+        SCO data can be sent/received through HCI synchronous packets, or the data
+        can be routed to on-chip PCM module on ESP32. PCM input/output signals can
+        be "matrixed" to GPIOs. The default data path can also be set using API
+        "esp_bredr_sco_datapath_set"
+
+    config BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_HCI
+        bool "HCI"
+    config BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_PCM
+        bool "PCM"
+endchoice
+
+config BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_EFF
+    int
+    default 0 if BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_HCI
+    default 1 if BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_PCM
+    default 0
+
 config BTDM_CONTROLLER_BLE_MAX_CONN_EFF
     int
     default BTDM_CONTROLLER_BLE_MAX_CONN if BTDM_CONTROLLER_MODE_BLE_ONLY || BTDM_CONTROLLER_MODE_BTDM
@@ -170,7 +193,6 @@ config BTDM_LPCLK_SEL_EXT_32K_XTAL
     bool "External 32kHz crystal"
     depends on ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
 endchoice
-
 endmenu
 
 config BLE_SCAN_DUPLICATE
@@ -369,15 +391,15 @@ endchoice
 choice HFP_AUDIO_DATA_PATH
     prompt "audio(SCO) data path"
     depends on HFP_ENABLE
+    help
+        SCO data path, i.e. HCI or PCM. This option is set using API
+        "esp_bredr_sco_datapath_set" in Bluetooth host. Default SCO data
+        path can also be set in Bluetooth Controller.
 
 config HFP_AUDIO_DATA_PATH_PCM
     bool "PCM"
-    help
-        This enables the Serial Port Profile
 config HFP_AUDIO_DATA_PATH_HCI
     bool "HCI"
-    help
-        This enables the Serial Port Profile
 endchoice
 
 config GATTS_ENABLE

components/bt/include/esp_bt.h

@@ -25,7 +25,7 @@
 extern "C" {
 #endif
 
-#define ESP_BT_CONTROLLER_CONFIG_MAGIC_VAL  0x5A5AA5A5
+#define ESP_BT_CONTROLLER_CONFIG_MAGIC_VAL  0x20190506
 
 /**
  * @brief Bluetooth mode for controller enable/disable
@@ -100,6 +100,9 @@ the adv packet will be discarded until the memory is restored. */
 #define BTDM_CONTROLLER_BR_EDR_MAX_ACL_CONN_LIMIT   7   //Maximum ACL connection limitation
 #define BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN_LIMIT  3   //Maximum SCO/eSCO connection limitation
 
+#define BTDM_CONTROLLER_SCO_DATA_PATH_HCI           0   // SCO data is routed to HCI
+#define BTDM_CONTROLLER_SCO_DATA_PATH_PCM           1   // SCO data path is PCM
+
 #define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {                              \
     .controller_task_stack_size = ESP_TASK_BT_CONTROLLER_STACK,            \
     .controller_task_prio = ESP_TASK_BT_CONTROLLER_PRIO,                   \
@@ -114,6 +117,7 @@ the adv packet will be discarded until the memory is restored. */
     .mode = BTDM_CONTROLLER_MODE_EFF,                                      \
     .ble_max_conn = CONFIG_BTDM_CONTROLLER_BLE_MAX_CONN_EFF,               \
     .bt_max_acl_conn = CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_ACL_CONN_EFF,     \
+    .bt_sco_datapath = CONFIG_BTDM_CONTROLLER_BR_EDR_SCO_DATA_PATH_EFF,    \
     .bt_max_sync_conn = CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN_EFF,   \
     .magic = ESP_BT_CONTROLLER_CONFIG_MAGIC_VAL,                           \
 };
@@ -144,6 +148,7 @@ typedef struct {
     uint8_t mode;                           /*!< Controller mode: BR/EDR, BLE or Dual Mode */
     uint8_t ble_max_conn;                   /*!< BLE maximum connection numbers */
     uint8_t bt_max_acl_conn;                /*!< BR/EDR maximum ACL connection numbers */
+    uint8_t bt_sco_datapath;                /*!< SCO data path, i.e. HCI or PCM module */
     /*
      * Following parameters can not be configured runtime when call esp_bt_controller_init()
      * It will be overwrite with a constant value which in menuconfig or from a macro.