feat(nimble): Nimble Host only mode over uart

components/bt/CMakeLists.txt

@@ -53,7 +53,9 @@ set(ble_mesh_include_dirs
 
 set(bluedroid_include_dirs host/bluedroid/api/include/api)
 
+if(CONFIG_BT_CONTROLLER_ENABLED OR CONFIG_IDF_DOC_BUILD)
 set(nimble_hci_include_dirs host/nimble/esp-hci/include)
+endif()
 
 if(CONFIG_IDF_DOC_BUILD)
     list(APPEND include_dirs
@@ -567,6 +569,11 @@ if(CONFIG_BT_ENABLED)
                     "porting/nimble/src/os_msys_init.c"
             )
 
+            if(CONFIG_BT_CONTROLLER_DISABLED)
+                list(APPEND srcs
+                        "host/nimble/nimble/porting/nimble/src/hal_uart.c"
+                    )
+            endif()
             list(APPEND include_dirs
                     porting/include
                     porting/nimble/include
@@ -697,6 +704,13 @@ if(CONFIG_BT_ENABLED)
                     "host/nimble/nimble/nimble/host/src/ble_gattc_cache_conn.c"
                 )
 
+            if(CONFIG_BT_CONTROLLER_DISABLED AND CONFIG_BT_NIMBLE_TRANSPORT_UART)
+                list(APPEND srcs
+                        "host/nimble/nimble/nimble/transport/uart_ll/src/hci_uart.c"
+                        "host/nimble/nimble/nimble/transport/common/hci_h4/src/hci_h4.c"
+                )
+            endif()
+
             list(APPEND srcs
                 "host/nimble/nimble/porting/nimble/src/nimble_port.c"
                 "host/nimble/nimble/porting/npl/freertos/src/nimble_port_freertos.c"
@@ -709,6 +723,12 @@ if(CONFIG_BT_ENABLED)
                 host/nimble/nimble/nimble/transport/include
             )
 
+            if(CONFIG_BT_CONTROLLER_DISABLED)
+                list(APPEND include_dirs
+                    host/nimble/nimble/nimble/transport/common/hci_h4/include
+                )
+            endif()
+
         if(NOT CONFIG_BT_LE_CONTROLLER_NPL_OS_PORTING_SUPPORT)
             list(APPEND srcs
                     "host/nimble/nimble/porting/nimble/src/endian.c"
@@ -718,6 +738,13 @@ if(CONFIG_BT_ENABLED)
                     "host/nimble/nimble/porting/nimble/src/os_msys_init.c"
                     "host/nimble/nimble/porting/npl/freertos/src/npl_os_freertos.c"
                     )
+
+            if(CONFIG_BT_CONTROLLER_DISABLED AND CONFIG_BT_NIMBLE_TRANSPORT_UART)
+                list(APPEND srcs
+                    "host/nimble/nimble/porting/nimble/src/hal_uart.c"
+                )
+            endif()
+
             list(APPEND include_dirs
                     host/nimble/nimble/porting/npl/freertos/include
                     host/nimble/nimble/porting/nimble/include
@@ -725,7 +752,7 @@ if(CONFIG_BT_ENABLED)
             )
         endif()
 
-        if(CONFIG_BT_NIMBLE_LEGACY_VHCI_ENABLE)
+        if(CONFIG_BT_NIMBLE_LEGACY_VHCI_ENABLE AND CONFIG_BT_CONTROLLER_ENABLED)
             list(APPEND srcs
                 "host/nimble/esp-hci/src/esp_nimble_hci.c"
             )

components/bt/Kconfig

@@ -21,7 +21,6 @@ menu "Bluetooth"
 
         config BT_NIMBLE_ENABLED
             bool "NimBLE - BLE only"
-            depends on BT_CONTROLLER_ENABLED
             help
                 This option is recommended for BLE only usecases to save on memory
 

components/bt/host/nimble/Kconfig.in

@@ -926,3 +926,26 @@ config BT_NIMBLE_HOST_QUEUE_CONG_CHECK
         When scanning and scan duplicate is not enabled, if there are a lot of adv packets around
         or application layer handling adv packets is slow, it will cause the controller memory
         to run out. if enabled, adv packets will be lost when host queue is congested.
+
+menu "Host-controller Transport"
+    config BT_NIMBLE_TRANSPORT_UART
+        bool "Enable Uart Transport"
+        default y
+        depends on BT_CONTROLLER_DISABLED
+        help
+            Use UART transport
+
+    config BT_NIMBLE_UART_RX_PIN
+        int "Rx pin for Nimble Uart"
+        depends on BT_CONTROLLER_DISABLED && BT_NIMBLE_TRANSPORT_UART
+        default 5
+        help
+            Rx pin for Nimble Transport
+
+    config BT_NIMBLE_UART_TX_PIN
+        int "Tx pin for Nimble Uart"
+        depends on BT_CONTROLLER_DISABLED && BT_NIMBLE_TRANSPORT_UART
+        default 4
+        help
+            Tx pin for Nimble Transport
+endmenu

components/bt/host/nimble/esp-hci/src/esp_nimble_hci.c

@@ -15,7 +15,9 @@
 #include "esp_nimble_hci.h"
 #include "esp_nimble_mem.h"
 #include "bt_osi_mem.h"
+#if CONFIG_BT_CONTROLLER_ENABLED
 #include "esp_bt.h"
+#endif
 #include "freertos/semphr.h"
 #include "esp_compiler.h"
 #include "soc/soc_caps.h"

components/bt/host/nimble/port/include/esp_nimble_cfg.h

@@ -1792,4 +1792,40 @@
 #endif
 #endif
 
+#if CONFIG_BT_CONTROLLER_DISABLED
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_PORT
+/* #ifdef CONFIG_BT_NIMBLE_TRANSPORT_UART_PORT */
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_PORT /* CONFIG_BT_NIMBLE_TRANSPORT_UART_PORT */ (1)
+/* #endif */
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY_none
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY_none MYNEWT_VAL_BLE_HCI_UART_PARITY
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY__odd
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY__odd (0)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY__even
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_PARITY__even (0)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_FLOW_CONTROL__rtscts
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_FLOW_CONTROL__rtscts (0)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_BAUDRATE
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_BAUDRATE (921600)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_DATA_BITS
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_DATA_BITS (3)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_TRANSPORT_UART_STOP_BITS
+#define MYNEWT_VAL_BLE_TRANSPORT_UART_STOP_BITS (1)
+#endif
+#endif
+
 #endif

components/bt/porting/include/mem_api.h

@@ -11,7 +11,7 @@
 extern "C" {
 #endif
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 
 struct os_mempool;
 struct os_mbuf_pool;

components/bt/porting/nimble/include/nimble/ble_hci_trans.h

@@ -63,7 +63,7 @@ extern "C" {
 typedef int ble_hci_trans_rx_cmd_fn(uint8_t *cmd, void *arg);
 typedef int ble_hci_trans_rx_acl_fn(struct os_mbuf *om, void *arg);
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 #define ble_transport_alloc_cmd() ble_hci_trans_buf_alloc(BLE_HCI_TRANS_BUF_CMD)
 #define ble_transport_alloc_event(X) ble_hci_trans_buf_alloc(X ? BLE_HCI_TRANS_BUF_EVT_LO : BLE_HCI_TRANS_BUF_EVT_HI)
 #define ble_transport_free ble_hci_trans_buf_free

components/bt/porting/nimble/include/nimble/nimble_port.h

@@ -27,7 +27,7 @@
 
 #define NIMBLE_HS_STACK_SIZE CONFIG_BT_NIMBLE_HOST_TASK_STACK_SIZE
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 #define NIMBLE_LL_STACK_SIZE CONFIG_BT_LE_CONTROLLER_TASK_STACK_SIZE
 #endif
 

components/bt/porting/nimble/include/os/endian.h

@@ -213,7 +213,7 @@ extern "C" {
 
 #endif
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 void r_put_le16(void *buf, uint16_t x);
 #define put_le16 r_put_le16
 

components/bt/porting/nimble/include/os/os_mbuf.h

@@ -244,7 +244,7 @@ _os_mbuf_trailingspace(struct os_mbuf *om)
 #define OS_MBUF_TRAILINGSPACE(__om) _os_mbuf_trailingspace(__om)
 
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 /**
  * Initializes an mqueue.  An mqueue is a queue of mbufs that ties to a
  * particular task's event queue.  Mqueues form a helper API around a common

components/bt/porting/nimble/include/os/os_mempool.h

@@ -163,7 +163,7 @@ typedef __uint128_t os_membuf_t;
 #define OS_MEMPOOL_BYTES(n,blksize)     \
     (sizeof (os_membuf_t) * OS_MEMPOOL_SIZE((n), (blksize)))
 
-#if SOC_ESP_NIMBLE_CONTROLLER
+#if SOC_ESP_NIMBLE_CONTROLLER && CONFIG_BT_CONTROLLER_ENABLED
 /**
  * Initialize a memory pool.
  *