soc: riscv: esp32c3: added initial support for ble

subsystem by linking esp32 vhci adapter to the
espressif ble controller adapter

Signed-off-by: Felipe Neves <felipe.neves@espressif.com>

boards/riscv/esp32c3_devkitm/Kconfig.defconfig

@@ -6,3 +6,17 @@
 config BOARD
 	default "esp32c3"
 	depends on BOARD_ESP32C3_DEVKITM
+
+if BT
+
+config HEAP_MEM_POOL_SIZE
+	default 16384
+
+config ENTROPY_GENERATOR
+	default y
+
+choice BT_HCI_BUS_TYPE
+	default BT_ESP32
+endchoice
+
+endif # BT

boards/riscv/esp32c3_devkitm/esp32c3_devkitm_defconfig

@@ -10,3 +10,6 @@ CONFIG_SERIAL=y
 CONFIG_UART_CONSOLE=y
 CONFIG_UART_ROM_ESP32C3=y
 CONFIG_XIP=n
+CONFIG_HEAP_MEM_POOL_SIZE=16384
+CONFIG_BT=y
+

drivers/bluetooth/hci/hci_esp32.c

@@ -254,7 +254,7 @@ static int bt_esp32_ble_init(void)
 	int ret;
 	esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
 
-#ifdef CONFIG_BT_BREDR
+#if defined(CONFIG_BT_BREDR) && defined(CONFIG_SOC_ESP32)
 	esp_bt_mode_t mode = ESP_BT_MODE_BTDM;
 #else
 	esp_bt_mode_t mode = ESP_BT_MODE_BLE;

soc/riscv/esp32c3/Kconfig.defconfig

@@ -20,6 +20,9 @@ config GEN_SW_ISR_TABLE
 config GEN_IRQ_VECTOR_TABLE
 	default n
 
+config DYNAMIC_INTERRUPTS
+	default y
+
 config XIP
 	default n
 

soc/riscv/esp32c3/linker.ld

@@ -150,6 +150,15 @@ SECTIONS
   .dram0.data :
   {
     _data_start = ABSOLUTE(.);
+		_bt_data_start = ABSOLUTE(.);
+		*libbt.a:(.data .data.*)
+		. = ALIGN (4);
+		_bt_data_end = ABSOLUTE(.);
+		_btdm_data_start = ABSOLUTE(.);
+		*libbtdm_app.a:(.data .data.*)
+		. = ALIGN (4);
+		_btdm_data_end = ABSOLUTE(.);
+
     *(.data)
     *(.data.*)
     *(.gnu.linkonce.d.*)
@@ -188,6 +197,16 @@ SECTIONS
   {
     . = ALIGN (8);
     __bss_start = ABSOLUTE(.);
+
+    _bt_bss_start = ABSOLUTE(.);
+    *libbt.a:(.bss .bss.* COMMON)
+    . = ALIGN (4);
+    _bt_bss_end = ABSOLUTE(.);
+    _btdm_bss_start = ABSOLUTE(.);
+    *libbtdm_app.a:(.bss .bss.* COMMON)
+    . = ALIGN (4);
+    _btdm_bss_end = ABSOLUTE(.);
+
     *(.dynsbss)
     *(.sbss)
     *(.sbss.*)