| /****************************************************************************** |
| * |
| * 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_hci_mct" |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "bt_vendor_lib.h" |
| #include "hci_hal.h" |
| #include "osi/include/eager_reader.h" |
| #include "osi/include/log.h" |
| #include "osi/include/osi.h" |
| #include "osi/include/reactor.h" |
| #include "vendor.h" |
| |
| #define HCI_HAL_SERIAL_BUFFER_SIZE 1026 |
| |
| static bool hal_init(const hci_hal_callbacks_t *upper_callbacks, |
| thread_t *upper_thread); |
| static bool hal_open(void); |
| static void hal_close(void); |
| static size_t read_data(serial_data_type_t type, uint8_t *buffer, |
| size_t max_size); |
| static void packet_finished(UNUSED_ATTR serial_data_type_t type); |
| static uint16_t transmit_data(serial_data_type_t type, uint8_t *data, |
| uint16_t length); |
| static uint16_t transmit_data_on(int fd, uint8_t *data, uint16_t length); |
| static void event_event_stream_has_bytes(eager_reader_t *reader, void *context); |
| static void event_acl_stream_has_bytes(eager_reader_t *reader, void *context); |
| |
| |
| // Our interface and modules we import |
| static const hci_hal_t interface = { |
| hal_init, |
| hal_open, |
| hal_close, |
| read_data, |
| packet_finished, |
| transmit_data, |
| }; |
| static const hci_hal_callbacks_t *callbacks; |
| static const vendor_t *vendor; |
| |
| static thread_t *thread; // Not owned by us |
| |
| static int uart_fds[CH_MAX]; |
| static eager_reader_t *event_stream; |
| static eager_reader_t *acl_stream; |
| |
| // Interface functions |
| |
| static bool hal_init(const hci_hal_callbacks_t *upper_callbacks, thread_t *upper_thread) { |
| assert(upper_callbacks != NULL); |
| assert(upper_thread != NULL); |
| |
| callbacks = upper_callbacks; |
| thread = upper_thread; |
| return true; |
| } |
| |
| static bool hal_open(void) { |
| LOG_INFO(LOG_TAG, "%s", __func__); |
| // TODO(zachoverflow): close if already open / or don't reopen (maybe at the hci layer level) |
| |
| int number_of_ports = vendor->send_command(VENDOR_OPEN_USERIAL, &uart_fds); |
| |
| if (number_of_ports != 2 && number_of_ports != 4) { |
| LOG_ERROR(LOG_TAG, "%s opened the wrong number of ports: got %d, expected 2 or 4.", __func__, number_of_ports); |
| goto error; |
| } |
| |
| LOG_INFO(LOG_TAG, "%s got uart fds: CMD=%d, EVT=%d, ACL_OUT=%d, ACL_IN=%d", |
| __func__, uart_fds[CH_CMD], uart_fds[CH_EVT], uart_fds[CH_ACL_OUT], uart_fds[CH_ACL_IN]); |
| |
| if (uart_fds[CH_CMD] == INVALID_FD) { |
| LOG_ERROR(LOG_TAG, "%s unable to open the command uart serial port.", __func__); |
| goto error; |
| } |
| |
| if (uart_fds[CH_EVT] == INVALID_FD) { |
| LOG_ERROR(LOG_TAG, "%s unable to open the event uart serial port.", __func__); |
| goto error; |
| } |
| |
| if (uart_fds[CH_ACL_OUT] == INVALID_FD) { |
| LOG_ERROR(LOG_TAG, "%s unable to open the acl-out uart serial port.", __func__); |
| goto error; |
| } |
| |
| if (uart_fds[CH_ACL_IN] == INVALID_FD) { |
| LOG_ERROR(LOG_TAG, "%s unable to open the acl-in uart serial port.", __func__); |
| goto error; |
| } |
| |
| event_stream = eager_reader_new(uart_fds[CH_EVT], &allocator_malloc, HCI_HAL_SERIAL_BUFFER_SIZE, SIZE_MAX, "hci_mct"); |
| if (!event_stream) { |
| LOG_ERROR(LOG_TAG, "%s unable to create eager reader for the event uart serial port.", __func__); |
| goto error; |
| } |
| |
| acl_stream = eager_reader_new(uart_fds[CH_ACL_IN], &allocator_malloc, HCI_HAL_SERIAL_BUFFER_SIZE, SIZE_MAX, "hci_mct"); |
| if (!acl_stream) { |
| LOG_ERROR(LOG_TAG, "%s unable to create eager reader for the acl-in uart serial port.", __func__); |
| goto error; |
| } |
| |
| eager_reader_register(event_stream, thread_get_reactor(thread), event_event_stream_has_bytes, NULL); |
| eager_reader_register(acl_stream, thread_get_reactor(thread), event_acl_stream_has_bytes, NULL); |
| |
| return true; |
| |
| error:; |
| interface.close(); |
| return false; |
| } |
| |
| static void hal_close(void) { |
| LOG_INFO(LOG_TAG, "%s", __func__); |
| |
| eager_reader_free(event_stream); |
| event_stream = NULL; |
| |
| eager_reader_free(acl_stream); |
| acl_stream = NULL; |
| |
| vendor->send_command(VENDOR_CLOSE_USERIAL, NULL); |
| |
| for (int i = 0; i < CH_MAX; i++) |
| uart_fds[i] = INVALID_FD; |
| } |
| |
| static size_t read_data(serial_data_type_t type, uint8_t *buffer, size_t max_size) { |
| if (type == DATA_TYPE_ACL) { |
| return eager_reader_read(acl_stream, buffer, max_size); |
| } else if (type == DATA_TYPE_EVENT) { |
| return eager_reader_read(event_stream, buffer, max_size); |
| } |
| |
| LOG_ERROR(LOG_TAG, "%s invalid data type: %d", __func__, type); |
| return 0; |
| } |
| |
| static void packet_finished(UNUSED_ATTR serial_data_type_t type) { |
| // not needed by this protocol |
| } |
| |
| static uint16_t transmit_data(serial_data_type_t type, uint8_t *data, uint16_t length) { |
| if (type == DATA_TYPE_ACL) { |
| return transmit_data_on(uart_fds[CH_ACL_OUT], data, length); |
| } else if (type == DATA_TYPE_COMMAND) { |
| return transmit_data_on(uart_fds[CH_CMD], data, length); |
| } |
| |
| LOG_ERROR(LOG_TAG, "%s invalid data type: %d", __func__, type); |
| return 0; |
| } |
| |
| // Internal functions |
| |
| static uint16_t transmit_data_on(int fd, uint8_t *data, uint16_t length) { |
| assert(data != NULL); |
| assert(length > 0); |
| |
| uint16_t transmitted_length = 0; |
| while (length > 0) { |
| ssize_t ret; |
| OSI_NO_INTR(ret = write(fd, data + transmitted_length, length)); |
| switch (ret) { |
| case -1: |
| LOG_ERROR(LOG_TAG, "In %s, error writing to the serial port with fd %d: %s", __func__, fd, strerror(errno)); |
| return transmitted_length; |
| case 0: |
| // If we wrote nothing, don't loop more because we |
| // can't go to infinity or beyond |
| return transmitted_length; |
| default: |
| transmitted_length += ret; |
| length -= ret; |
| break; |
| } |
| } |
| |
| return transmitted_length; |
| } |
| |
| static void event_event_stream_has_bytes(UNUSED_ATTR eager_reader_t *reader, UNUSED_ATTR void *context) { |
| callbacks->data_ready(DATA_TYPE_EVENT); |
| } |
| |
| static void event_acl_stream_has_bytes(UNUSED_ATTR eager_reader_t *reader, UNUSED_ATTR void *context) { |
| // No real concept of incoming SCO typed data, just ACL |
| callbacks->data_ready(DATA_TYPE_ACL); |
| } |
| |
| const hci_hal_t *hci_hal_mct_get_interface() { |
| vendor = vendor_get_interface(); |
| return &interface; |
| } |
| |
| const hci_hal_t *hci_hal_mct_get_test_interface(vendor_t *vendor_interface) { |
| vendor = vendor_interface; |
| return &interface; |
| } |