feat(nimble): Added transport/esp_ipc_btdm for btdm atch

nimble/transport/esp_ipc_btdm/src/hci_esp_ipc.c

@@ -0,0 +1,91 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+#include <sysinit/sysinit.h>
+#include <syscfg/syscfg.h>
+#include "os/os_mbuf.h"
+#include "nimble/transport.h"
+#include "esp_hci_transport.h"
+#include "esp_hci_driver.h"
+#include "esp_hci_internal.h"
+
+static int
+ble_transport_dummy_host_recv_cb(hci_driver_data_type_t type, uint8_t *data, uint16_t len)
+{
+    /* Dummy function */
+    return 0;
+}
+
+static int
+ble_transport_host_recv_cb(hci_driver_data_type_t type, uint8_t *data, uint16_t len)
+{
+    int rc = 0;
+    if (type == HCI_DRIVER_TYPE_ACL) {
+#if CONFIG_BT_NIMBLE_ROLE_CENTRAL || CONFIG_BT_NIMBLE_ROLE_PERIPHERAL
+        rc = ble_transport_to_hs_acl((struct os_mbuf *)data);
+#endif
+    }
+#if MYNEWT_VAL(BLE_ISO) 
+    else if (type == HCI_DRIVER_TYPE_ISO) {
+        rc = ble_transport_to_hs_iso_v2(data, len);
+    }
+#endif /* MYNEWT_VAL(BLE_ISO)  */
+    else if (type == HCI_DRIVER_TYPE_EVT) {
+        rc = ble_transport_to_hs_evt(data);
+    }
+    return rc;
+}
+
+int
+ble_transport_to_ll_cmd_impl(void *buf)
+{
+    hci_driver_packet_t *pkt;
+    uint16_t len;
+
+    pkt = HCI_DRIVER_D2P(buf);
+    len = *(uint8_t *)(buf + 2);
+    pkt->length = len;
+    return hci_driver_host_cmd_tx((uint8_t *)pkt, len);
+}
+
+int
+ble_transport_to_ll_acl_impl(struct os_mbuf *om)
+{
+    return hci_driver_host_acl_tx((uint8_t *)om, 0);
+}
+
+void
+ble_transport_ll_init(void)
+{
+    hci_driver_host_callback_register(ble_transport_host_recv_cb);
+}
+
+void
+ble_transport_ll_deinit(void)
+{
+    hci_driver_host_callback_register(ble_transport_dummy_host_recv_cb);
+}
+
+void *
+ble_transport_alloc_cmd(void)
+{
+    hci_driver_packet_t *pkt = NULL;
+    
+    pkt = btdm_hci_trans_buf_alloc(HCI_DRIVER_TYPE_CMD, 0);
+    assert(pkt);
+    pkt->type = HCI_DRIVER_TYPE_CMD;
+
+    return pkt->data;   
+}
+
+void
+ble_transport_free(void *buf)
+{
+    r_ble_hci_trans_buf_free(buf);
+}