| /****************************************************************************** |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #define LOG_TAG "bt_vendor" |
| |
| #include "vendor.h" |
| |
| #include <assert.h> |
| #include <dlfcn.h> |
| |
| #include "buffer_allocator.h" |
| #include "osi/include/log.h" |
| #include "osi/include/osi.h" |
| |
| #define LAST_VENDOR_OPCODE_VALUE VENDOR_DO_EPILOG |
| |
| static const char *VENDOR_LIBRARY_NAME = "libbt-vendor.so"; |
| static const char *VENDOR_LIBRARY_SYMBOL_NAME = "BLUETOOTH_VENDOR_LIB_INTERFACE"; |
| |
| static const vendor_t interface; |
| static const allocator_t *buffer_allocator; |
| static const hci_t *hci; |
| static vendor_cb callbacks[LAST_VENDOR_OPCODE_VALUE + 1]; |
| |
| static void *lib_handle; |
| static bt_vendor_interface_t *lib_interface; |
| static const bt_vendor_callbacks_t lib_callbacks; |
| |
| // Interface functions |
| |
| static bool vendor_open( |
| const uint8_t *local_bdaddr, |
| const hci_t *hci_interface) { |
| assert(lib_handle == NULL); |
| hci = hci_interface; |
| |
| lib_handle = dlopen(VENDOR_LIBRARY_NAME, RTLD_NOW); |
| if (!lib_handle) { |
| LOG_ERROR(LOG_TAG, "%s unable to open %s: %s", __func__, VENDOR_LIBRARY_NAME, dlerror()); |
| goto error; |
| } |
| |
| lib_interface = (bt_vendor_interface_t *)dlsym(lib_handle, VENDOR_LIBRARY_SYMBOL_NAME); |
| if (!lib_interface) { |
| LOG_ERROR(LOG_TAG, "%s unable to find symbol %s in %s: %s", __func__, VENDOR_LIBRARY_SYMBOL_NAME, VENDOR_LIBRARY_NAME, dlerror()); |
| goto error; |
| } |
| |
| LOG_INFO(LOG_TAG, "alloc value %p", lib_callbacks.alloc); |
| |
| int status = lib_interface->init(&lib_callbacks, (unsigned char *)local_bdaddr); |
| if (status) { |
| LOG_ERROR(LOG_TAG, "%s unable to initialize vendor library: %d", __func__, status); |
| goto error; |
| } |
| |
| return true; |
| |
| error:; |
| lib_interface = NULL; |
| if (lib_handle) |
| dlclose(lib_handle); |
| lib_handle = NULL; |
| return false; |
| } |
| |
| static void vendor_close(void) { |
| if (lib_interface) |
| lib_interface->cleanup(); |
| |
| if (lib_handle) |
| dlclose(lib_handle); |
| |
| lib_interface = NULL; |
| lib_handle = NULL; |
| } |
| |
| static int send_command(vendor_opcode_t opcode, void *param) { |
| assert(lib_interface != NULL); |
| return lib_interface->op(opcode, param); |
| } |
| |
| static int send_async_command(vendor_async_opcode_t opcode, void *param) { |
| assert(lib_interface != NULL); |
| return lib_interface->op(opcode, param); |
| } |
| |
| static void set_callback(vendor_async_opcode_t opcode, vendor_cb callback) { |
| callbacks[opcode] = callback; |
| } |
| |
| // Internal functions |
| |
| // Called back from vendor library when the firmware configuration |
| // completes. |
| static void firmware_config_cb(bt_vendor_op_result_t result) { |
| LOG_INFO(LOG_TAG, "firmware callback"); |
| vendor_cb callback = callbacks[VENDOR_CONFIGURE_FIRMWARE]; |
| assert(callback != NULL); |
| callback(result == BT_VND_OP_RESULT_SUCCESS); |
| } |
| |
| // Called back from vendor library to indicate status of previous |
| // SCO configuration request. This should only happen during the |
| // postload process. |
| static void sco_config_cb(bt_vendor_op_result_t result) { |
| LOG_INFO(LOG_TAG, "%s", __func__); |
| vendor_cb callback = callbacks[VENDOR_CONFIGURE_SCO]; |
| assert(callback != NULL); |
| callback(result == BT_VND_OP_RESULT_SUCCESS); |
| } |
| |
| // Called back from vendor library to indicate status of previous |
| // LPM enable/disable request. |
| static void low_power_mode_cb(bt_vendor_op_result_t result) { |
| LOG_INFO(LOG_TAG, "%s", __func__); |
| vendor_cb callback = callbacks[VENDOR_SET_LPM_MODE]; |
| assert(callback != NULL); |
| callback(result == BT_VND_OP_RESULT_SUCCESS); |
| } |
| |
| /****************************************************************************** |
| ** |
| ** Function sco_audiostate_cb |
| ** |
| ** Description HOST/CONTROLLER VENDOR LIB CALLBACK API - This function is |
| ** called when the libbt-vendor completed vendor specific codec |
| ** setup request |
| ** |
| ** Returns None |
| ** |
| ******************************************************************************/ |
| static void sco_audiostate_cb(bt_vendor_op_result_t result) |
| { |
| uint8_t status = (result == BT_VND_OP_RESULT_SUCCESS) ? 0 : 1; |
| |
| LOG_INFO(LOG_TAG, "sco_audiostate_cb(status: %d)",status); |
| } |
| |
| // Called by vendor library when it needs an HCI buffer. |
| static void *buffer_alloc_cb(int size) { |
| return buffer_allocator->alloc(size); |
| } |
| |
| // Called by vendor library when it needs to free a buffer allocated with |
| // |buffer_alloc_cb|. |
| static void buffer_free_cb(void *buffer) { |
| buffer_allocator->free(buffer); |
| } |
| |
| static void transmit_completed_callback(BT_HDR *response, void *context) { |
| // Call back to the vendor library if it provided a callback to call. |
| if (context) |
| ((tINT_CMD_CBACK)context)(response); |
| } |
| |
| // Called back from vendor library when it wants to send an HCI command. |
| static uint8_t transmit_cb(UNUSED_ATTR uint16_t opcode, void *buffer, tINT_CMD_CBACK callback) { |
| assert(hci != NULL); |
| hci->transmit_command((BT_HDR *)buffer, transmit_completed_callback, NULL, callback); |
| return true; |
| } |
| |
| // Called back from vendor library when the epilog procedure has |
| // completed. It is safe to call vendor_interface->cleanup() after |
| // this callback has been received. |
| static void epilog_cb(bt_vendor_op_result_t result) { |
| LOG_INFO(LOG_TAG, "%s", __func__); |
| vendor_cb callback = callbacks[VENDOR_DO_EPILOG]; |
| assert(callback != NULL); |
| callback(result == BT_VND_OP_RESULT_SUCCESS); |
| } |
| |
| static const bt_vendor_callbacks_t lib_callbacks = { |
| sizeof(lib_callbacks), |
| firmware_config_cb, |
| sco_config_cb, |
| low_power_mode_cb, |
| sco_audiostate_cb, |
| buffer_alloc_cb, |
| buffer_free_cb, |
| transmit_cb, |
| epilog_cb |
| }; |
| |
| static const vendor_t interface = { |
| vendor_open, |
| vendor_close, |
| send_command, |
| send_async_command, |
| set_callback, |
| }; |
| |
| const vendor_t *vendor_get_interface() { |
| buffer_allocator = buffer_allocator_get_interface(); |
| return &interface; |
| } |