mirror of
https://github.com/espressif/esp-idf.git
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384 lines
11 KiB
C
384 lines
11 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2014 Google, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include <string.h>
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#include "common/bt_defs.h"
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#include "common/bt_trace.h"
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#include "stack/bt_types.h"
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#include "osi/fixed_queue.h"
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#include "hci/hci_hal.h"
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#include "hci/hci_internals.h"
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#include "hci/hci_layer.h"
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#include "osi/thread.h"
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#include "esp_bt.h"
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#include "stack/hcimsgs.h"
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#define HCI_H4_TASK_PINNED_TO_CORE (TASK_PINNED_TO_CORE)
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#define HCI_H4_TASK_STACK_SIZE (2048 + BT_TASK_EXTRA_STACK_SIZE)
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#define HCI_H4_TASK_PRIO (configMAX_PRIORITIES - 4)
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#define HCI_H4_TASK_NAME "hciH4T"
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#define HCI_H4_QUEUE_LEN 1
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#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
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#include "l2c_int.h"
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#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
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#include "stack/hcimsgs.h"
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#define HCI_HAL_SERIAL_BUFFER_SIZE 1026
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#define HCI_BLE_EVENT 0x3e
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#define PACKET_TYPE_TO_INBOUND_INDEX(type) ((type) - 2)
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#define PACKET_TYPE_TO_INDEX(type) ((type) - 1)
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extern bool BTU_check_queue_is_congest(void);
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static const uint8_t preamble_sizes[] = {
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HCI_COMMAND_PREAMBLE_SIZE,
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HCI_ACL_PREAMBLE_SIZE,
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HCI_SCO_PREAMBLE_SIZE,
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HCI_EVENT_PREAMBLE_SIZE
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};
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static const uint16_t outbound_event_types[] = {
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MSG_HC_TO_STACK_HCI_ERR,
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MSG_HC_TO_STACK_HCI_ACL,
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MSG_HC_TO_STACK_HCI_SCO,
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MSG_HC_TO_STACK_HCI_EVT
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};
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typedef struct {
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size_t buffer_size;
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fixed_queue_t *rx_q;
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uint16_t adv_free_num;
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} hci_hal_env_t;
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static hci_hal_env_t hci_hal_env;
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static const hci_hal_t interface;
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static const hci_hal_callbacks_t *callbacks;
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static const esp_vhci_host_callback_t vhci_host_cb;
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static osi_thread_t *hci_h4_thread;
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static void host_send_pkt_available_cb(void);
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static int host_recv_pkt_cb(uint8_t *data, uint16_t len);
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static void hci_hal_h4_rx_handler(void *arg);
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static void event_uart_has_bytes(fixed_queue_t *queue);
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static void hci_hal_env_init(
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size_t buffer_size,
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size_t max_buffer_count)
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{
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assert(buffer_size > 0);
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assert(max_buffer_count > 0);
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hci_hal_env.buffer_size = buffer_size;
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hci_hal_env.adv_free_num = 0;
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hci_hal_env.rx_q = fixed_queue_new(max_buffer_count);
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if (hci_hal_env.rx_q) {
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fixed_queue_register_dequeue(hci_hal_env.rx_q, event_uart_has_bytes);
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} else {
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HCI_TRACE_ERROR("%s unable to create rx queue.\n", __func__);
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}
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return;
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}
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static void hci_hal_env_deinit(void)
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{
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fixed_queue_free(hci_hal_env.rx_q, osi_free_func);
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hci_hal_env.rx_q = NULL;
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}
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static bool hal_open(const hci_hal_callbacks_t *upper_callbacks)
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{
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assert(upper_callbacks != NULL);
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callbacks = upper_callbacks;
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#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
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hci_hal_env_init(HCI_HAL_SERIAL_BUFFER_SIZE, BLE_ADV_REPORT_FLOW_CONTROL_NUM + L2CAP_HOST_FC_ACL_BUFS + QUEUE_SIZE_MAX); // adv flow control num + ACL flow control num + hci cmd numeber
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#else
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hci_hal_env_init(HCI_HAL_SERIAL_BUFFER_SIZE, QUEUE_SIZE_MAX);
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#endif
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hci_h4_thread = osi_thread_create(HCI_H4_TASK_NAME, HCI_H4_TASK_STACK_SIZE, HCI_H4_TASK_PRIO, HCI_H4_TASK_PINNED_TO_CORE, 1);
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if (hci_h4_thread == NULL) {
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return false;
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}
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//register vhci host cb
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if (esp_vhci_host_register_callback(&vhci_host_cb) != ESP_OK) {
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return false;
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}
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return true;
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}
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static void hal_close()
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{
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hci_hal_env_deinit();
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osi_thread_free(hci_h4_thread);
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hci_h4_thread = NULL;
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}
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/**
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* Function: transmit_data -TX data to low-layer
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* It is ported from Bluedroid source code, so it is not
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* needed to use write() to send data.
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* TODO: Just use firmware API to send data.
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*/
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static uint16_t transmit_data(serial_data_type_t type,
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uint8_t *data, uint16_t length)
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{
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uint8_t previous_byte;
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assert(data != NULL);
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assert(length > 0);
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if (type < DATA_TYPE_COMMAND || type > DATA_TYPE_SCO) {
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HCI_TRACE_ERROR("%s invalid data type: %d", __func__, type);
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return 0;
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}
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// Write the signal byte right before the data
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--data;
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previous_byte = *data;
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*(data) = type;
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++length;
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BTTRC_DUMP_BUFFER("Transmit Pkt", data, length);
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// TX Data to target
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esp_vhci_host_send_packet(data, length);
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// Be nice and restore the old value of that byte
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*(data) = previous_byte;
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return length - 1;
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}
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// Internal functions
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static void hci_hal_h4_rx_handler(void *arg)
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{
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fixed_queue_process(hci_hal_env.rx_q);
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}
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bool hci_hal_h4_task_post(osi_thread_blocking_t blocking)
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{
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return osi_thread_post(hci_h4_thread, hci_hal_h4_rx_handler, NULL, 0, blocking);
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}
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#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
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static void hci_packet_complete(BT_HDR *packet){
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uint8_t type, num_handle;
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uint16_t handle;
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uint16_t handles[MAX_L2CAP_LINKS + 4];
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uint16_t num_packets[MAX_L2CAP_LINKS + 4];
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uint8_t *stream = packet->data + packet->offset;
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tL2C_LCB *p_lcb = NULL;
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STREAM_TO_UINT8(type, stream);
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if (type == DATA_TYPE_ACL/* || type == DATA_TYPE_SCO*/) {
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STREAM_TO_UINT16(handle, stream);
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handle = handle & HCI_DATA_HANDLE_MASK;
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p_lcb = l2cu_find_lcb_by_handle(handle);
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if (p_lcb) {
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p_lcb->completed_packets++;
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}
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if (esp_vhci_host_check_send_available()){
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num_handle = l2cu_find_completed_packets(handles, num_packets);
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if (num_handle > 0){
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btsnd_hcic_host_num_xmitted_pkts (num_handle, handles, num_packets);
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}
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} else {
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//Send HCI_Host_Number_of_Completed_Packets next time.
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}
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}
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}
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#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
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bool host_recv_adv_packet(BT_HDR *packet)
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{
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assert(packet);
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if(packet->data[0] == DATA_TYPE_EVENT && packet->data[1] == HCI_BLE_EVENT) {
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if(packet->data[3] == HCI_BLE_ADV_PKT_RPT_EVT
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#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
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|| packet->data[3] == HCI_BLE_ADV_DISCARD_REPORT_EVT
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#endif
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) {
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return true;
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}
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}
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return false;
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}
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#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
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static void hci_update_adv_report_flow_control(BT_HDR *packet)
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{
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// this is adv packet
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if(host_recv_adv_packet(packet)) {
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// update adv free number
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hci_hal_env.adv_free_num ++;
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if (esp_vhci_host_check_send_available()){
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// send hci cmd
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btsnd_hcic_ble_update_adv_report_flow_control(hci_hal_env.adv_free_num);
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hci_hal_env.adv_free_num = 0;
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} else {
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//do nothing
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}
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}
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}
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#endif
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static void hci_hal_h4_hdl_rx_packet(BT_HDR *packet)
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{
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uint8_t type, hdr_size;
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uint16_t length;
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uint8_t *stream = packet->data + packet->offset;
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if (!packet) {
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return;
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}
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#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
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hci_packet_complete(packet);
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#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
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STREAM_TO_UINT8(type, stream);
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packet->offset++;
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packet->len--;
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if (type == HCI_BLE_EVENT) {
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#if (!CONFIG_BT_STACK_NO_LOG)
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uint8_t len = 0;
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STREAM_TO_UINT8(len, stream);
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#endif
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HCI_TRACE_ERROR("Workround stream corrupted during LE SCAN: pkt_len=%d ble_event_len=%d\n",
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packet->len, len);
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osi_free(packet);
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return;
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}
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if (type < DATA_TYPE_ACL || type > DATA_TYPE_EVENT) {
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HCI_TRACE_ERROR("%s Unknown HCI message type. Dropping this byte 0x%x,"
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" min %x, max %x\n", __func__, type,
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DATA_TYPE_ACL, DATA_TYPE_EVENT);
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osi_free(packet);
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return;
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}
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hdr_size = preamble_sizes[type - 1];
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if (packet->len < hdr_size) {
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HCI_TRACE_ERROR("Wrong packet length type=%d pkt_len=%d hdr_len=%d",
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type, packet->len, hdr_size);
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osi_free(packet);
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return;
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}
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if (type == DATA_TYPE_ACL) {
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stream += hdr_size - 2;
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STREAM_TO_UINT16(length, stream);
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} else {
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stream += hdr_size - 1;
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STREAM_TO_UINT8(length, stream);
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}
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if ((length + hdr_size) != packet->len) {
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HCI_TRACE_ERROR("Wrong packet length type=%d hdr_len=%d pd_len=%d "
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"pkt_len=%d", type, hdr_size, length, packet->len);
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osi_free(packet);
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return;
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}
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#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
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hci_update_adv_report_flow_control(packet);
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#endif
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#if SCAN_QUEUE_CONGEST_CHECK
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if(BTU_check_queue_is_congest() && host_recv_adv_packet(packet)) {
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HCI_TRACE_ERROR("BtuQueue is congested");
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osi_free(packet);
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return;
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}
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#endif
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packet->event = outbound_event_types[PACKET_TYPE_TO_INDEX(type)];
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callbacks->packet_ready(packet);
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}
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static void event_uart_has_bytes(fixed_queue_t *queue)
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{
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BT_HDR *packet;
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while (!fixed_queue_is_empty(queue)) {
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packet = fixed_queue_dequeue(queue);
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hci_hal_h4_hdl_rx_packet(packet);
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}
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}
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static void host_send_pkt_available_cb(void)
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{
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//Controller rx cache buffer is ready for receiving new host packet
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//Just Call Host main thread task to process pending packets.
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hci_host_task_post(OSI_THREAD_BLOCKING);
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}
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static int host_recv_pkt_cb(uint8_t *data, uint16_t len)
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{
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//Target has packet to host, malloc new buffer for packet
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BT_HDR *pkt;
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size_t pkt_size;
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if (hci_hal_env.rx_q == NULL) {
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return 0;
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}
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pkt_size = BT_HDR_SIZE + len;
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pkt = (BT_HDR *) osi_calloc(pkt_size);
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//pkt = (BT_HDR *)hci_hal_env.allocator->alloc(pkt_size);
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if (!pkt) {
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HCI_TRACE_ERROR("%s couldn't aquire memory for inbound data buffer.\n", __func__);
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return -1;
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}
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pkt->offset = 0;
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pkt->len = len;
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pkt->layer_specific = 0;
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memcpy(pkt->data, data, len);
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fixed_queue_enqueue(hci_hal_env.rx_q, pkt);
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hci_hal_h4_task_post(OSI_THREAD_NON_BLOCKING);
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BTTRC_DUMP_BUFFER("Recv Pkt", pkt->data, len);
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return 0;
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}
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static const esp_vhci_host_callback_t vhci_host_cb = {
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.notify_host_send_available = host_send_pkt_available_cb,
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.notify_host_recv = host_recv_pkt_cb,
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};
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static const hci_hal_t interface = {
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hal_open,
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hal_close,
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transmit_data,
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};
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const hci_hal_t *hci_hal_h4_get_interface()
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{
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return &interface;
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}
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