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OVMS3-idf/components/bt/bluedroid/hci/hci_hal_h4.c

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/******************************************************************************
*
* 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.
*
******************************************************************************/
#include <string.h>
#include "common/bt_defs.h"
#include "common/bt_trace.h"
#include "stack/bt_types.h"
#include "osi/fixed_queue.h"
#include "hci/hci_hal.h"
#include "hci/hci_internals.h"
#include "hci/hci_layer.h"
#include "osi/thread.h"
#include "esp_bt.h"
#include "stack/hcimsgs.h"
#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
#include "l2c_int.h"
#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
#define HCI_HAL_SERIAL_BUFFER_SIZE 1026
#define HCI_BLE_EVENT 0x3e
#define PACKET_TYPE_TO_INBOUND_INDEX(type) ((type) - 2)
#define PACKET_TYPE_TO_INDEX(type) ((type) - 1)
extern bool BTU_check_queue_is_congest(void);
static const uint8_t preamble_sizes[] = {
HCI_COMMAND_PREAMBLE_SIZE,
HCI_ACL_PREAMBLE_SIZE,
HCI_SCO_PREAMBLE_SIZE,
HCI_EVENT_PREAMBLE_SIZE
};
static const uint16_t outbound_event_types[] = {
MSG_HC_TO_STACK_HCI_ERR,
MSG_HC_TO_STACK_HCI_ACL,
MSG_HC_TO_STACK_HCI_SCO,
MSG_HC_TO_STACK_HCI_EVT
};
typedef struct {
size_t buffer_size;
fixed_queue_t *rx_q;
uint16_t adv_free_num;
} hci_hal_env_t;
static hci_hal_env_t hci_hal_env;
static const hci_hal_t interface;
static const hci_hal_callbacks_t *callbacks;
static const esp_vhci_host_callback_t vhci_host_cb;
static xTaskHandle xHciH4TaskHandle;
static xQueueHandle xHciH4Queue;
static void host_send_pkt_available_cb(void);
static int host_recv_pkt_cb(uint8_t *data, uint16_t len);
static void hci_hal_h4_rx_handler(void *arg);
static void event_uart_has_bytes(fixed_queue_t *queue);
static void hci_hal_env_init(
size_t buffer_size,
size_t max_buffer_count)
{
assert(buffer_size > 0);
assert(max_buffer_count > 0);
hci_hal_env.buffer_size = buffer_size;
hci_hal_env.adv_free_num = 0;
hci_hal_env.rx_q = fixed_queue_new(max_buffer_count);
if (hci_hal_env.rx_q) {
fixed_queue_register_dequeue(hci_hal_env.rx_q, event_uart_has_bytes);
} else {
HCI_TRACE_ERROR("%s unable to create rx queue.\n", __func__);
}
return;
}
static void hci_hal_env_deinit(void)
{
fixed_queue_free(hci_hal_env.rx_q, osi_free_func);
hci_hal_env.rx_q = NULL;
}
static bool hal_open(const hci_hal_callbacks_t *upper_callbacks)
{
assert(upper_callbacks != NULL);
callbacks = upper_callbacks;
#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
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
#else
hci_hal_env_init(HCI_HAL_SERIAL_BUFFER_SIZE, QUEUE_SIZE_MAX);
#endif
xHciH4Queue = xQueueCreate(HCI_H4_QUEUE_LEN, sizeof(BtTaskEvt_t));
xTaskCreatePinnedToCore(hci_hal_h4_rx_handler, HCI_H4_TASK_NAME, HCI_H4_TASK_STACK_SIZE, NULL, HCI_H4_TASK_PRIO, &xHciH4TaskHandle, HCI_H4_TASK_PINNED_TO_CORE);
//register vhci host cb
if (esp_vhci_host_register_callback(&vhci_host_cb) != ESP_OK) {
return false;
}
return true;
}
static void hal_close()
{
hci_hal_env_deinit();
/* delete task and queue */
vTaskDelete(xHciH4TaskHandle);
vQueueDelete(xHciH4Queue);
}
/**
* Function: transmit_data -TX data to low-layer
* It is ported from Bluedroid source code, so it is not
* needed to use write() to send data.
* TODO: Just use firmware API to send data.
*/
static uint16_t transmit_data(serial_data_type_t type,
uint8_t *data, uint16_t length)
{
uint8_t previous_byte;
assert(data != NULL);
assert(length > 0);
if (type < DATA_TYPE_COMMAND || type > DATA_TYPE_SCO) {
HCI_TRACE_ERROR("%s invalid data type: %d", __func__, type);
return 0;
}
// Write the signal byte right before the data
--data;
previous_byte = *data;
*(data) = type;
++length;
BTTRC_DUMP_BUFFER("Transmit Pkt", data, length);
// TX Data to target
esp_vhci_host_send_packet(data, length);
// Be nice and restore the old value of that byte
*(data) = previous_byte;
return length - 1;
}
// Internal functions
static void hci_hal_h4_rx_handler(void *arg)
{
BtTaskEvt_t e;
for (;;) {
if (pdTRUE == xQueueReceive(xHciH4Queue, &e, (portTickType)portMAX_DELAY)) {
if (e.sig == SIG_HCI_HAL_RECV_PACKET) {
fixed_queue_process(hci_hal_env.rx_q);
}
}
}
}
task_post_status_t hci_hal_h4_task_post(task_post_t timeout)
{
BtTaskEvt_t evt;
evt.sig = SIG_HCI_HAL_RECV_PACKET;
evt.par = 0;
if (xQueueSend(xHciH4Queue, &evt, timeout) != pdTRUE) {
return TASK_POST_FAIL;
}
return TASK_POST_SUCCESS;
}
#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
static void hci_packet_complete(BT_HDR *packet){
uint8_t type, num_handle;
uint16_t handle;
uint16_t handles[MAX_L2CAP_LINKS + 4];
uint16_t num_packets[MAX_L2CAP_LINKS + 4];
uint8_t *stream = packet->data + packet->offset;
tL2C_LCB *p_lcb = NULL;
STREAM_TO_UINT8(type, stream);
if (type == DATA_TYPE_ACL/* || type == DATA_TYPE_SCO*/) {
STREAM_TO_UINT16(handle, stream);
handle = handle & HCI_DATA_HANDLE_MASK;
p_lcb = l2cu_find_lcb_by_handle(handle);
if (p_lcb) {
p_lcb->completed_packets++;
}
if (esp_vhci_host_check_send_available()){
num_handle = l2cu_find_completed_packets(handles, num_packets);
if (num_handle > 0){
btsnd_hcic_host_num_xmitted_pkts (num_handle, handles, num_packets);
}
} else {
//Send HCI_Host_Number_of_Completed_Packets next time.
}
}
}
#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
bool host_recv_adv_packet(BT_HDR *packet)
{
assert(packet);
if(packet->data[0] == DATA_TYPE_EVENT && packet->data[1] == HCI_BLE_EVENT) {
if(packet->data[3] == HCI_BLE_ADV_PKT_RPT_EVT
#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
|| packet->data[3] == HCI_BLE_ADV_DISCARD_REPORT_EVT
#endif
) {
return true;
}
}
return false;
}
#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
static void hci_update_adv_report_flow_control(BT_HDR *packet)
{
// this is adv packet
if(host_recv_adv_packet(packet)) {
// update adv free number
hci_hal_env.adv_free_num ++;
if (esp_vhci_host_check_send_available()){
// send hci cmd
btsnd_hcic_ble_update_adv_report_flow_control(hci_hal_env.adv_free_num);
hci_hal_env.adv_free_num = 0;
} else {
//do nothing
}
}
}
#endif
static void hci_hal_h4_hdl_rx_packet(BT_HDR *packet)
{
uint8_t type, hdr_size;
uint16_t length;
uint8_t *stream = packet->data + packet->offset;
if (!packet) {
return;
}
#if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
hci_packet_complete(packet);
#endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
STREAM_TO_UINT8(type, stream);
packet->offset++;
packet->len--;
if (type == HCI_BLE_EVENT) {
#if (!CONFIG_BT_STACK_NO_LOG)
uint8_t len = 0;
STREAM_TO_UINT8(len, stream);
#endif
HCI_TRACE_ERROR("Workround stream corrupted during LE SCAN: pkt_len=%d ble_event_len=%d\n",
packet->len, len);
osi_free(packet);
return;
}
if (type < DATA_TYPE_ACL || type > DATA_TYPE_EVENT) {
HCI_TRACE_ERROR("%s Unknown HCI message type. Dropping this byte 0x%x,"
" min %x, max %x\n", __func__, type,
DATA_TYPE_ACL, DATA_TYPE_EVENT);
osi_free(packet);
return;
}
hdr_size = preamble_sizes[type - 1];
if (packet->len < hdr_size) {
HCI_TRACE_ERROR("Wrong packet length type=%d pkt_len=%d hdr_len=%d",
type, packet->len, hdr_size);
osi_free(packet);
return;
}
if (type == DATA_TYPE_ACL) {
stream += hdr_size - 2;
STREAM_TO_UINT16(length, stream);
} else {
stream += hdr_size - 1;
STREAM_TO_UINT8(length, stream);
}
if ((length + hdr_size) != packet->len) {
HCI_TRACE_ERROR("Wrong packet length type=%d hdr_len=%d pd_len=%d "
"pkt_len=%d", type, hdr_size, length, packet->len);
osi_free(packet);
return;
}
#if (BLE_ADV_REPORT_FLOW_CONTROL == TRUE)
hci_update_adv_report_flow_control(packet);
#endif
#if SCAN_QUEUE_CONGEST_CHECK
if(BTU_check_queue_is_congest() && host_recv_adv_packet(packet)) {
HCI_TRACE_ERROR("BtuQueue is congested");
osi_free(packet);
return;
}
#endif
packet->event = outbound_event_types[PACKET_TYPE_TO_INDEX(type)];
callbacks->packet_ready(packet);
}
static void event_uart_has_bytes(fixed_queue_t *queue)
{
BT_HDR *packet;
while (!fixed_queue_is_empty(queue)) {
packet = fixed_queue_dequeue(queue);
hci_hal_h4_hdl_rx_packet(packet);
}
}
static void host_send_pkt_available_cb(void)
{
//Controller rx cache buffer is ready for receiving new host packet
//Just Call Host main thread task to process pending packets.
hci_host_task_post(TASK_POST_BLOCKING);
}
static int host_recv_pkt_cb(uint8_t *data, uint16_t len)
{
//Target has packet to host, malloc new buffer for packet
BT_HDR *pkt;
size_t pkt_size;
if (hci_hal_env.rx_q == NULL) {
return 0;
}
pkt_size = BT_HDR_SIZE + len;
pkt = (BT_HDR *) osi_calloc(pkt_size);
//pkt = (BT_HDR *)hci_hal_env.allocator->alloc(pkt_size);
if (!pkt) {
HCI_TRACE_ERROR("%s couldn't aquire memory for inbound data buffer.\n", __func__);
return -1;
}
pkt->offset = 0;
pkt->len = len;
pkt->layer_specific = 0;
memcpy(pkt->data, data, len);
fixed_queue_enqueue(hci_hal_env.rx_q, pkt);
hci_hal_h4_task_post(0);
BTTRC_DUMP_BUFFER("Recv Pkt", pkt->data, len);
return 0;
}
static const esp_vhci_host_callback_t vhci_host_cb = {
.notify_host_send_available = host_send_pkt_available_cb,
.notify_host_recv = host_recv_pkt_cb,
};
static const hci_hal_t interface = {
hal_open,
hal_close,
transmit_data,
};
const hci_hal_t *hci_hal_h4_get_interface()
{
return &interface;
}
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