| 1 | /* $NetBSD: btuart.c,v 1.28 2015/08/20 14:40:17 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2006, 2007 KIYOHARA Takashi |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 25 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: btuart.c,v 1.28 2015/08/20 14:40:17 christos Exp $" ); |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/conf.h> |
| 34 | #include <sys/device.h> |
| 35 | #include <sys/errno.h> |
| 36 | #include <sys/fcntl.h> |
| 37 | #include <sys/kauth.h> |
| 38 | #include <sys/kernel.h> |
| 39 | #include <sys/malloc.h> |
| 40 | #include <sys/mbuf.h> |
| 41 | #include <sys/proc.h> |
| 42 | #include <sys/syslimits.h> |
| 43 | #include <sys/systm.h> |
| 44 | #include <sys/tty.h> |
| 45 | |
| 46 | #include <sys/bus.h> |
| 47 | #include <sys/intr.h> |
| 48 | |
| 49 | #include <netbt/bluetooth.h> |
| 50 | #include <netbt/hci.h> |
| 51 | |
| 52 | #include "ioconf.h" |
| 53 | |
| 54 | struct btuart_softc { |
| 55 | device_t sc_dev; |
| 56 | struct tty * sc_tp; /* tty pointer */ |
| 57 | |
| 58 | bool sc_enabled; /* device is enabled */ |
| 59 | struct hci_unit *sc_unit; /* Bluetooth HCI handle */ |
| 60 | struct bt_stats sc_stats; |
| 61 | |
| 62 | int sc_state; /* receive state */ |
| 63 | int sc_want; /* how much we want */ |
| 64 | struct mbuf * sc_rxp; /* incoming packet */ |
| 65 | |
| 66 | bool sc_xmit; /* transmit is active */ |
| 67 | struct mbuf * sc_txp; /* outgoing packet */ |
| 68 | |
| 69 | /* transmit queues */ |
| 70 | MBUFQ_HEAD() sc_cmdq; |
| 71 | MBUFQ_HEAD() sc_aclq; |
| 72 | MBUFQ_HEAD() sc_scoq; |
| 73 | }; |
| 74 | |
| 75 | /* sc_state */ |
| 76 | #define BTUART_RECV_PKT_TYPE 0 /* packet type */ |
| 77 | #define BTUART_RECV_ACL_HDR 1 /* acl header */ |
| 78 | #define BTUART_RECV_SCO_HDR 2 /* sco header */ |
| 79 | #define BTUART_RECV_EVENT_HDR 3 /* event header */ |
| 80 | #define BTUART_RECV_ACL_DATA 4 /* acl packet data */ |
| 81 | #define BTUART_RECV_SCO_DATA 5 /* sco packet data */ |
| 82 | #define BTUART_RECV_EVENT_DATA 6 /* event packet data */ |
| 83 | |
| 84 | static int btuart_match(device_t, cfdata_t, void *); |
| 85 | static void btuart_attach(device_t, device_t, void *); |
| 86 | static int btuart_detach(device_t, int); |
| 87 | |
| 88 | static int btuartopen(dev_t, struct tty *); |
| 89 | static int btuartclose(struct tty *, int); |
| 90 | static int btuartioctl(struct tty *, u_long, void *, int, struct lwp *); |
| 91 | static int btuartinput(int, struct tty *); |
| 92 | static int btuartstart(struct tty *); |
| 93 | |
| 94 | static int btuart_enable(device_t); |
| 95 | static void btuart_disable(device_t); |
| 96 | static void btuart_output_cmd(device_t, struct mbuf *); |
| 97 | static void btuart_output_acl(device_t, struct mbuf *); |
| 98 | static void btuart_output_sco(device_t, struct mbuf *); |
| 99 | static void btuart_stats(device_t, struct bt_stats *, int); |
| 100 | |
| 101 | /* |
| 102 | * It doesn't need to be exported, as only btuartattach() uses it, |
| 103 | * but there's no "official" way to make it static. |
| 104 | */ |
| 105 | CFATTACH_DECL_NEW(btuart, sizeof(struct btuart_softc), |
| 106 | btuart_match, btuart_attach, btuart_detach, NULL); |
| 107 | |
| 108 | static struct linesw btuart_disc = { |
| 109 | .l_name = "btuart" , |
| 110 | .l_open = btuartopen, |
| 111 | .l_close = btuartclose, |
| 112 | .l_read = ttyerrio, |
| 113 | .l_write = ttyerrio, |
| 114 | .l_ioctl = btuartioctl, |
| 115 | .l_rint = btuartinput, |
| 116 | .l_start = btuartstart, |
| 117 | .l_modem = ttymodem, |
| 118 | .l_poll = ttyerrpoll, |
| 119 | }; |
| 120 | |
| 121 | static const struct hci_if btuart_hci = { |
| 122 | .enable = btuart_enable, |
| 123 | .disable = btuart_disable, |
| 124 | .output_cmd = btuart_output_cmd, |
| 125 | .output_acl = btuart_output_acl, |
| 126 | .output_sco = btuart_output_sco, |
| 127 | .get_stats = btuart_stats, |
| 128 | .ipl = IPL_TTY, |
| 129 | }; |
| 130 | |
| 131 | /***************************************************************************** |
| 132 | * |
| 133 | * autoconf(9) functions |
| 134 | */ |
| 135 | |
| 136 | /* |
| 137 | * pseudo-device attach routine. |
| 138 | */ |
| 139 | void |
| 140 | btuartattach(int num __unused) |
| 141 | { |
| 142 | int error; |
| 143 | |
| 144 | error = ttyldisc_attach(&btuart_disc); |
| 145 | if (error) { |
| 146 | aprint_error("%s: unable to register line discipline, " |
| 147 | "error = %d\n" , btuart_cd.cd_name, error); |
| 148 | |
| 149 | return; |
| 150 | } |
| 151 | |
| 152 | error = config_cfattach_attach(btuart_cd.cd_name, &btuart_ca); |
| 153 | if (error) { |
| 154 | aprint_error("%s: unable to register cfattach, error = %d\n" , |
| 155 | btuart_cd.cd_name, error); |
| 156 | |
| 157 | config_cfdriver_detach(&btuart_cd); |
| 158 | (void) ttyldisc_detach(&btuart_disc); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * Autoconf match routine. |
| 164 | */ |
| 165 | static int |
| 166 | btuart_match(device_t self __unused, cfdata_t cfdata __unused, |
| 167 | void *arg __unused) |
| 168 | { |
| 169 | |
| 170 | /* pseudo-device; always present */ |
| 171 | return 1; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Autoconf attach routine. |
| 176 | * Called by config_attach_pseudo(9) when we open the line discipline. |
| 177 | */ |
| 178 | static void |
| 179 | btuart_attach(device_t parent __unused, device_t self, void *aux __unused) |
| 180 | { |
| 181 | struct btuart_softc *sc = device_private(self); |
| 182 | |
| 183 | sc->sc_dev = self; |
| 184 | |
| 185 | MBUFQ_INIT(&sc->sc_cmdq); |
| 186 | MBUFQ_INIT(&sc->sc_aclq); |
| 187 | MBUFQ_INIT(&sc->sc_scoq); |
| 188 | |
| 189 | /* Attach Bluetooth unit */ |
| 190 | sc->sc_unit = hci_attach_pcb(&btuart_hci, self, 0); |
| 191 | if (sc->sc_unit == NULL) |
| 192 | aprint_error_dev(self, "HCI attach failed\n" ); |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Autoconf detach routine. |
| 197 | * Called when we close the line discipline. |
| 198 | */ |
| 199 | static int |
| 200 | btuart_detach(device_t self, int flags __unused) |
| 201 | { |
| 202 | struct btuart_softc *sc = device_private(self); |
| 203 | |
| 204 | btuart_disable(self); |
| 205 | |
| 206 | if (sc->sc_unit) { |
| 207 | hci_detach_pcb(sc->sc_unit); |
| 208 | sc->sc_unit = NULL; |
| 209 | } |
| 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | /***************************************************************************** |
| 215 | * |
| 216 | * Line discipline functions. |
| 217 | */ |
| 218 | |
| 219 | static int |
| 220 | btuartopen(dev_t devno __unused, struct tty *tp) |
| 221 | { |
| 222 | struct btuart_softc *sc; |
| 223 | device_t dev; |
| 224 | cfdata_t cfdata; |
| 225 | struct lwp *l = curlwp; /* XXX */ |
| 226 | int error, unit, s; |
| 227 | |
| 228 | error = kauth_authorize_device(l->l_cred, KAUTH_DEVICE_BLUETOOTH_BTUART, |
| 229 | KAUTH_ARG(KAUTH_REQ_DEVICE_BLUETOOTH_BTUART_ADD), NULL, NULL, NULL); |
| 230 | if (error) |
| 231 | return (error); |
| 232 | |
| 233 | s = spltty(); |
| 234 | |
| 235 | if (tp->t_linesw == &btuart_disc) { |
| 236 | sc = tp->t_sc; |
| 237 | if (sc != NULL) { |
| 238 | splx(s); |
| 239 | return EBUSY; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | KASSERT(tp->t_oproc != NULL); |
| 244 | |
| 245 | cfdata = malloc(sizeof(struct cfdata), M_DEVBUF, M_WAITOK); |
| 246 | for (unit = 0; unit < btuart_cd.cd_ndevs; unit++) |
| 247 | if (device_lookup(&btuart_cd, unit) == NULL) |
| 248 | break; |
| 249 | |
| 250 | cfdata->cf_name = btuart_cd.cd_name; |
| 251 | cfdata->cf_atname = btuart_cd.cd_name; |
| 252 | cfdata->cf_unit = unit; |
| 253 | cfdata->cf_fstate = FSTATE_STAR; |
| 254 | |
| 255 | dev = config_attach_pseudo(cfdata); |
| 256 | if (dev == NULL) { |
| 257 | free(cfdata, M_DEVBUF); |
| 258 | splx(s); |
| 259 | return EIO; |
| 260 | } |
| 261 | sc = device_private(dev); |
| 262 | |
| 263 | aprint_normal_dev(dev, "major %llu minor %llu\n" , |
| 264 | (unsigned long long)major(tp->t_dev), |
| 265 | (unsigned long long)minor(tp->t_dev)); |
| 266 | |
| 267 | sc->sc_tp = tp; |
| 268 | tp->t_sc = sc; |
| 269 | |
| 270 | mutex_spin_enter(&tty_lock); |
| 271 | ttyflush(tp, FREAD | FWRITE); |
| 272 | mutex_spin_exit(&tty_lock); |
| 273 | |
| 274 | splx(s); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static int |
| 280 | btuartclose(struct tty *tp, int flag __unused) |
| 281 | { |
| 282 | struct btuart_softc *sc = tp->t_sc; |
| 283 | cfdata_t cfdata; |
| 284 | int s; |
| 285 | |
| 286 | s = spltty(); |
| 287 | |
| 288 | mutex_spin_enter(&tty_lock); |
| 289 | ttyflush(tp, FREAD | FWRITE); |
| 290 | mutex_spin_exit(&tty_lock); /* XXX */ |
| 291 | |
| 292 | ttyldisc_release(tp->t_linesw); |
| 293 | tp->t_linesw = ttyldisc_default(); |
| 294 | |
| 295 | if (sc != NULL) { |
| 296 | tp->t_sc = NULL; |
| 297 | if (sc->sc_tp == tp) { |
| 298 | cfdata = device_cfdata(sc->sc_dev); |
| 299 | config_detach(sc->sc_dev, 0); |
| 300 | free(cfdata, M_DEVBUF); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | splx(s); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int |
| 310 | btuartioctl(struct tty *tp, u_long cmd, void *data __unused, |
| 311 | int flag __unused, struct lwp *l __unused) |
| 312 | { |
| 313 | struct btuart_softc *sc = tp->t_sc; |
| 314 | int error; |
| 315 | |
| 316 | if (sc == NULL || tp != sc->sc_tp) |
| 317 | return EPASSTHROUGH; |
| 318 | |
| 319 | switch(cmd) { |
| 320 | default: |
| 321 | error = EPASSTHROUGH; |
| 322 | break; |
| 323 | } |
| 324 | |
| 325 | return error; |
| 326 | } |
| 327 | |
| 328 | static int |
| 329 | btuartinput(int c, struct tty *tp) |
| 330 | { |
| 331 | struct btuart_softc *sc = tp->t_sc; |
| 332 | struct mbuf *m = sc->sc_rxp; |
| 333 | int space = 0; |
| 334 | |
| 335 | if (!sc->sc_enabled) |
| 336 | return 0; |
| 337 | |
| 338 | c &= TTY_CHARMASK; |
| 339 | |
| 340 | /* If we already started a packet, find the trailing end of it. */ |
| 341 | if (m) { |
| 342 | while (m->m_next) |
| 343 | m = m->m_next; |
| 344 | |
| 345 | space = M_TRAILINGSPACE(m); |
| 346 | } |
| 347 | |
| 348 | if (space == 0) { |
| 349 | if (m == NULL) { |
| 350 | /* new packet */ |
| 351 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 352 | if (m == NULL) { |
| 353 | aprint_error_dev(sc->sc_dev, "out of memory\n" ); |
| 354 | sc->sc_stats.err_rx++; |
| 355 | return 0; /* (lost sync) */ |
| 356 | } |
| 357 | |
| 358 | sc->sc_rxp = m; |
| 359 | m->m_pkthdr.len = m->m_len = 0; |
| 360 | space = MHLEN; |
| 361 | |
| 362 | sc->sc_state = BTUART_RECV_PKT_TYPE; |
| 363 | sc->sc_want = 1; |
| 364 | } else { |
| 365 | /* extend mbuf */ |
| 366 | MGET(m->m_next, M_DONTWAIT, MT_DATA); |
| 367 | if (m->m_next == NULL) { |
| 368 | aprint_error_dev(sc->sc_dev, "out of memory\n" ); |
| 369 | sc->sc_stats.err_rx++; |
| 370 | return 0; /* (lost sync) */ |
| 371 | } |
| 372 | |
| 373 | m = m->m_next; |
| 374 | m->m_len = 0; |
| 375 | space = MLEN; |
| 376 | |
| 377 | if (sc->sc_want > MINCLSIZE) { |
| 378 | MCLGET(m, M_DONTWAIT); |
| 379 | if (m->m_flags & M_EXT) |
| 380 | space = MCLBYTES; |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | mtod(m, uint8_t *)[m->m_len++] = c; |
| 386 | sc->sc_rxp->m_pkthdr.len++; |
| 387 | sc->sc_stats.byte_rx++; |
| 388 | |
| 389 | sc->sc_want--; |
| 390 | if (sc->sc_want > 0) |
| 391 | return 0; /* want more */ |
| 392 | |
| 393 | switch (sc->sc_state) { |
| 394 | case BTUART_RECV_PKT_TYPE: /* Got packet type */ |
| 395 | |
| 396 | switch (c) { |
| 397 | case HCI_ACL_DATA_PKT: |
| 398 | sc->sc_state = BTUART_RECV_ACL_HDR; |
| 399 | sc->sc_want = sizeof(hci_acldata_hdr_t) - 1; |
| 400 | break; |
| 401 | |
| 402 | case HCI_SCO_DATA_PKT: |
| 403 | sc->sc_state = BTUART_RECV_SCO_HDR; |
| 404 | sc->sc_want = sizeof(hci_scodata_hdr_t) - 1; |
| 405 | break; |
| 406 | |
| 407 | case HCI_EVENT_PKT: |
| 408 | sc->sc_state = BTUART_RECV_EVENT_HDR; |
| 409 | sc->sc_want = sizeof(hci_event_hdr_t) - 1; |
| 410 | break; |
| 411 | |
| 412 | default: |
| 413 | aprint_error_dev(sc->sc_dev, |
| 414 | "Unknown packet type=%#x!\n" , c); |
| 415 | sc->sc_stats.err_rx++; |
| 416 | m_freem(sc->sc_rxp); |
| 417 | sc->sc_rxp = NULL; |
| 418 | return 0; /* (lost sync) */ |
| 419 | } |
| 420 | |
| 421 | break; |
| 422 | |
| 423 | /* |
| 424 | * we assume (correctly of course :) that the packet headers all fit |
| 425 | * into a single pkthdr mbuf |
| 426 | */ |
| 427 | case BTUART_RECV_ACL_HDR: /* Got ACL Header */ |
| 428 | sc->sc_state = BTUART_RECV_ACL_DATA; |
| 429 | sc->sc_want = mtod(m, hci_acldata_hdr_t *)->length; |
| 430 | sc->sc_want = le16toh(sc->sc_want); |
| 431 | break; |
| 432 | |
| 433 | case BTUART_RECV_SCO_HDR: /* Got SCO Header */ |
| 434 | sc->sc_state = BTUART_RECV_SCO_DATA; |
| 435 | sc->sc_want = mtod(m, hci_scodata_hdr_t *)->length; |
| 436 | break; |
| 437 | |
| 438 | case BTUART_RECV_EVENT_HDR: /* Got Event Header */ |
| 439 | sc->sc_state = BTUART_RECV_EVENT_DATA; |
| 440 | sc->sc_want = mtod(m, hci_event_hdr_t *)->length; |
| 441 | break; |
| 442 | |
| 443 | case BTUART_RECV_ACL_DATA: /* ACL Packet Complete */ |
| 444 | if (!hci_input_acl(sc->sc_unit, sc->sc_rxp)) |
| 445 | sc->sc_stats.err_rx++; |
| 446 | |
| 447 | sc->sc_stats.acl_rx++; |
| 448 | sc->sc_rxp = m = NULL; |
| 449 | break; |
| 450 | |
| 451 | case BTUART_RECV_SCO_DATA: /* SCO Packet Complete */ |
| 452 | if (!hci_input_sco(sc->sc_unit, sc->sc_rxp)) |
| 453 | sc->sc_stats.err_rx++; |
| 454 | |
| 455 | sc->sc_stats.sco_rx++; |
| 456 | sc->sc_rxp = m = NULL; |
| 457 | break; |
| 458 | |
| 459 | case BTUART_RECV_EVENT_DATA: /* Event Packet Complete */ |
| 460 | if (!hci_input_event(sc->sc_unit, sc->sc_rxp)) |
| 461 | sc->sc_stats.err_rx++; |
| 462 | |
| 463 | sc->sc_stats.evt_rx++; |
| 464 | sc->sc_rxp = m = NULL; |
| 465 | break; |
| 466 | |
| 467 | default: |
| 468 | panic("%s: invalid state %d!\n" , |
| 469 | device_xname(sc->sc_dev), sc->sc_state); |
| 470 | } |
| 471 | |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | static int |
| 476 | btuartstart(struct tty *tp) |
| 477 | { |
| 478 | struct btuart_softc *sc = tp->t_sc; |
| 479 | struct mbuf *m; |
| 480 | int count, rlen; |
| 481 | uint8_t *rptr; |
| 482 | |
| 483 | if (!sc->sc_enabled) |
| 484 | return 0; |
| 485 | |
| 486 | m = sc->sc_txp; |
| 487 | if (m == NULL) { |
| 488 | if (MBUFQ_FIRST(&sc->sc_cmdq)) { |
| 489 | MBUFQ_DEQUEUE(&sc->sc_cmdq, m); |
| 490 | sc->sc_stats.cmd_tx++; |
| 491 | } else if (MBUFQ_FIRST(&sc->sc_scoq)) { |
| 492 | MBUFQ_DEQUEUE(&sc->sc_scoq, m); |
| 493 | sc->sc_stats.sco_tx++; |
| 494 | } else if (MBUFQ_FIRST(&sc->sc_aclq)) { |
| 495 | MBUFQ_DEQUEUE(&sc->sc_aclq, m); |
| 496 | sc->sc_stats.acl_tx++; |
| 497 | } else { |
| 498 | sc->sc_xmit = false; |
| 499 | return 0; /* no more to send */ |
| 500 | } |
| 501 | |
| 502 | sc->sc_txp = m; |
| 503 | sc->sc_xmit = true; |
| 504 | } |
| 505 | |
| 506 | count = 0; |
| 507 | rlen = 0; |
| 508 | rptr = mtod(m, uint8_t *); |
| 509 | |
| 510 | for(;;) { |
| 511 | if (rlen >= m->m_len) { |
| 512 | m = m->m_next; |
| 513 | if (m == NULL) { |
| 514 | m = sc->sc_txp; |
| 515 | sc->sc_txp = NULL; |
| 516 | |
| 517 | if (M_GETCTX(m, void *) == NULL) |
| 518 | m_freem(m); |
| 519 | else if (!hci_complete_sco(sc->sc_unit, m)) |
| 520 | sc->sc_stats.err_tx++; |
| 521 | |
| 522 | break; |
| 523 | } |
| 524 | |
| 525 | rlen = 0; |
| 526 | rptr = mtod(m, uint8_t *); |
| 527 | continue; |
| 528 | } |
| 529 | |
| 530 | if (putc(*rptr++, &tp->t_outq) < 0) { |
| 531 | m_adj(m, rlen); |
| 532 | break; |
| 533 | } |
| 534 | rlen++; |
| 535 | count++; |
| 536 | } |
| 537 | |
| 538 | sc->sc_stats.byte_tx += count; |
| 539 | |
| 540 | if (tp->t_outq.c_cc != 0) |
| 541 | (*tp->t_oproc)(tp); |
| 542 | |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | /***************************************************************************** |
| 547 | * |
| 548 | * bluetooth(9) functions |
| 549 | */ |
| 550 | |
| 551 | static int |
| 552 | btuart_enable(device_t self) |
| 553 | { |
| 554 | struct btuart_softc *sc = device_private(self); |
| 555 | int s; |
| 556 | |
| 557 | if (sc->sc_enabled) |
| 558 | return 0; |
| 559 | |
| 560 | s = spltty(); |
| 561 | |
| 562 | sc->sc_enabled = true; |
| 563 | sc->sc_xmit = false; |
| 564 | |
| 565 | splx(s); |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | static void |
| 571 | btuart_disable(device_t self) |
| 572 | { |
| 573 | struct btuart_softc *sc = device_private(self); |
| 574 | int s; |
| 575 | |
| 576 | if (!sc->sc_enabled) |
| 577 | return; |
| 578 | |
| 579 | s = spltty(); |
| 580 | |
| 581 | if (sc->sc_rxp) { |
| 582 | m_freem(sc->sc_rxp); |
| 583 | sc->sc_rxp = NULL; |
| 584 | } |
| 585 | |
| 586 | if (sc->sc_txp) { |
| 587 | m_freem(sc->sc_txp); |
| 588 | sc->sc_txp = NULL; |
| 589 | } |
| 590 | |
| 591 | MBUFQ_DRAIN(&sc->sc_cmdq); |
| 592 | MBUFQ_DRAIN(&sc->sc_aclq); |
| 593 | MBUFQ_DRAIN(&sc->sc_scoq); |
| 594 | |
| 595 | sc->sc_enabled = false; |
| 596 | |
| 597 | splx(s); |
| 598 | } |
| 599 | |
| 600 | static void |
| 601 | btuart_output_cmd(device_t self, struct mbuf *m) |
| 602 | { |
| 603 | struct btuart_softc *sc = device_private(self); |
| 604 | int s; |
| 605 | |
| 606 | KASSERT(sc->sc_enabled); |
| 607 | |
| 608 | M_SETCTX(m, NULL); |
| 609 | |
| 610 | s = spltty(); |
| 611 | MBUFQ_ENQUEUE(&sc->sc_cmdq, m); |
| 612 | if (!sc->sc_xmit) |
| 613 | btuartstart(sc->sc_tp); |
| 614 | |
| 615 | splx(s); |
| 616 | } |
| 617 | |
| 618 | static void |
| 619 | btuart_output_acl(device_t self, struct mbuf *m) |
| 620 | { |
| 621 | struct btuart_softc *sc = device_private(self); |
| 622 | int s; |
| 623 | |
| 624 | KASSERT(sc->sc_enabled); |
| 625 | |
| 626 | M_SETCTX(m, NULL); |
| 627 | |
| 628 | s = spltty(); |
| 629 | MBUFQ_ENQUEUE(&sc->sc_aclq, m); |
| 630 | if (!sc->sc_xmit) |
| 631 | btuartstart(sc->sc_tp); |
| 632 | |
| 633 | splx(s); |
| 634 | } |
| 635 | |
| 636 | static void |
| 637 | btuart_output_sco(device_t self, struct mbuf *m) |
| 638 | { |
| 639 | struct btuart_softc *sc = device_private(self); |
| 640 | int s; |
| 641 | |
| 642 | KASSERT(sc->sc_enabled); |
| 643 | |
| 644 | s = spltty(); |
| 645 | MBUFQ_ENQUEUE(&sc->sc_scoq, m); |
| 646 | if (!sc->sc_xmit) |
| 647 | btuartstart(sc->sc_tp); |
| 648 | |
| 649 | splx(s); |
| 650 | } |
| 651 | |
| 652 | static void |
| 653 | btuart_stats(device_t self, struct bt_stats *dest, int flush) |
| 654 | { |
| 655 | struct btuart_softc *sc = device_private(self); |
| 656 | int s; |
| 657 | |
| 658 | s = spltty(); |
| 659 | |
| 660 | memcpy(dest, &sc->sc_stats, sizeof(struct bt_stats)); |
| 661 | |
| 662 | if (flush) |
| 663 | memset(&sc->sc_stats, 0, sizeof(struct bt_stats)); |
| 664 | |
| 665 | splx(s); |
| 666 | } |
| 667 | |