Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 | /* userchan.c - HCI User Channel based Bluetooth driver */ /* * Copyright (c) 2018 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #include <zephyr.h> #include <device.h> #include <init.h> #include <sys/util.h> #include <sys/byteorder.h> #include <errno.h> #include <stddef.h> #include <stdlib.h> #include <poll.h> #include <errno.h> #include <sys/socket.h> #include <string.h> #include <unistd.h> #include "soc.h" #include "cmdline.h" /* native_posix command line options header */ #include <bluetooth/bluetooth.h> #include <bluetooth/hci.h> #include <bluetooth/hci_driver.h> #define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_DRIVER) #define LOG_MODULE_NAME bt_driver #include "common/log.h" #define BTPROTO_HCI 1 struct sockaddr_hci { sa_family_t hci_family; unsigned short hci_dev; unsigned short hci_channel; }; #define HCI_CHANNEL_USER 1 #define SOL_HCI 0 #define H4_CMD 0x01 #define H4_ACL 0x02 #define H4_SCO 0x03 #define H4_EVT 0x04 static K_THREAD_STACK_DEFINE(rx_thread_stack, CONFIG_ARCH_POSIX_RECOMMENDED_STACK_SIZE); static struct k_thread rx_thread_data; static int uc_fd = -1; static int bt_dev_index = -1; static struct net_buf *get_rx(const u8_t *buf) { if (buf[0] == H4_EVT) { return bt_buf_get_evt(buf[1], false, K_FOREVER); } return bt_buf_get_rx(BT_BUF_ACL_IN, K_FOREVER); } static bool uc_ready(void) { struct pollfd pollfd = { .fd = uc_fd, .events = POLLIN }; return (poll(&pollfd, 1, 0) == 1); } static void rx_thread(void *p1, void *p2, void *p3) { ARG_UNUSED(p1); ARG_UNUSED(p2); ARG_UNUSED(p3); BT_DBG("started"); while (1) { static u8_t frame[512]; struct net_buf *buf; ssize_t len; if (!uc_ready()) { k_sleep(K_MSEC(20)); continue; } BT_DBG("calling read()"); len = read(uc_fd, frame, sizeof(frame)); if (len < 0) { if (errno == EINTR) { k_yield(); continue; } BT_ERR("Reading socket failed, errno %d", errno); close(uc_fd); uc_fd = -1; return; } buf = get_rx(frame); net_buf_add_mem(buf, &frame[1], len - 1); BT_DBG("Calling bt_recv(%p)", buf); if (frame[0] == H4_EVT && bt_hci_evt_is_prio(frame[1])) { bt_recv_prio(buf); } else { bt_recv(buf); } k_yield(); } } static int uc_send(struct net_buf *buf) { BT_DBG("buf %p type %u len %u", buf, bt_buf_get_type(buf), buf->len); if (uc_fd < 0) { BT_ERR("User channel not open"); return -EIO; } switch (bt_buf_get_type(buf)) { case BT_BUF_ACL_OUT: net_buf_push_u8(buf, H4_ACL); break; case BT_BUF_CMD: net_buf_push_u8(buf, H4_CMD); break; default: BT_ERR("Unknown buffer type"); return -EINVAL; } if (write(uc_fd, buf->data, buf->len) < 0) { return -errno; } net_buf_unref(buf); return 0; } static int user_chan_open(u16_t index) { struct sockaddr_hci addr; int fd; fd = socket(PF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, BTPROTO_HCI); if (fd < 0) { return -errno; } (void)memset(&addr, 0, sizeof(addr)); addr.hci_family = AF_BLUETOOTH; addr.hci_dev = index; addr.hci_channel = HCI_CHANNEL_USER; if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) { int err = -errno; close(fd); return err; } return fd; } static int uc_open(void) { if (bt_dev_index < 0) { BT_ERR("No Bluetooth device specified"); return -ENODEV; } BT_DBG("hci%d", bt_dev_index); uc_fd = user_chan_open(bt_dev_index); if (uc_fd < 0) { return uc_fd; } BT_DBG("User Channel opened as fd %d", uc_fd); k_thread_create(&rx_thread_data, rx_thread_stack, K_THREAD_STACK_SIZEOF(rx_thread_stack), rx_thread, NULL, NULL, NULL, K_PRIO_COOP(CONFIG_BT_RX_PRIO - 1), 0, K_NO_WAIT); BT_DBG("returning"); return 0; } static const struct bt_hci_driver drv = { .name = "HCI User Channel", .bus = BT_HCI_DRIVER_BUS_UART, .open = uc_open, .send = uc_send, }; static int bt_uc_init(struct device *unused) { ARG_UNUSED(unused); bt_hci_driver_register(&drv); return 0; } SYS_INIT(bt_uc_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE); static void cmd_bt_dev_found(char *argv, int offset) { if (strncmp(&argv[offset], "hci", 3) || strlen(&argv[offset]) < 4) { posix_print_error_and_exit("Error: Invalid Bluetooth device " "name '%s' (should be e.g. hci0)\n", &argv[offset]); return; } bt_dev_index = strtol(&argv[offset + 3], NULL, 10); } static void add_btuserchan_arg(void) { static struct args_struct_t btuserchan_args[] = { /* * Fields: * manual, mandatory, switch, * option_name, var_name ,type, * destination, callback, * description */ { false, true, false, "bt-dev", "hciX", 's', NULL, cmd_bt_dev_found, "A local HCI device to be used for Bluetooth (e.g. hci0)" }, ARG_TABLE_ENDMARKER }; native_add_command_line_opts(btuserchan_args); } static void btuserchan_check_arg(void) { if (bt_dev_index < 0) { posix_print_error_and_exit("Error: Bluetooth device missing. " "Specify one using --bt-dev=hciN\n"); } } NATIVE_TASK(add_btuserchan_arg, PRE_BOOT_1, 10); NATIVE_TASK(btuserchan_check_arg, PRE_BOOT_2, 10); |