| 1 | /* $NetBSD: ucom.c,v 1.115 2016/11/19 09:49:20 skrll Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Lennart Augustsson (lennart@augustsson.net) at |
| 9 | * Carlstedt Research & Technology. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | /* |
| 33 | * This code is very heavily based on the 16550 driver, com.c. |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.115 2016/11/19 09:49:20 skrll Exp $" ); |
| 38 | |
| 39 | #ifdef _KERNEL_OPT |
| 40 | #include "opt_usb.h" |
| 41 | #endif |
| 42 | |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/systm.h> |
| 45 | #include <sys/kernel.h> |
| 46 | #include <sys/ioctl.h> |
| 47 | #include <sys/conf.h> |
| 48 | #include <sys/tty.h> |
| 49 | #include <sys/file.h> |
| 50 | #include <sys/select.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/vnode.h> |
| 53 | #include <sys/device.h> |
| 54 | #include <sys/poll.h> |
| 55 | #include <sys/queue.h> |
| 56 | #include <sys/kauth.h> |
| 57 | #include <sys/sysctl.h> |
| 58 | #include <sys/timepps.h> |
| 59 | #include <sys/rndsource.h> |
| 60 | |
| 61 | #include <dev/usb/usb.h> |
| 62 | |
| 63 | #include <dev/usb/usbdi.h> |
| 64 | #include <dev/usb/usbdi_util.h> |
| 65 | #include <dev/usb/usbdevs.h> |
| 66 | #include <dev/usb/usb_quirks.h> |
| 67 | #include <dev/usb/usbhist.h> |
| 68 | |
| 69 | #include <dev/usb/ucomvar.h> |
| 70 | |
| 71 | #include "ucom.h" |
| 72 | |
| 73 | #include "locators.h" |
| 74 | |
| 75 | #if NUCOM > 0 |
| 76 | |
| 77 | #ifdef USB_DEBUG |
| 78 | #ifndef UCOM_DEBUG |
| 79 | #define ucomdebug 0 |
| 80 | #else |
| 81 | int ucomdebug = 0; |
| 82 | |
| 83 | SYSCTL_SETUP(sysctl_hw_ucom_setup, "sysctl hw.ucom setup" ) |
| 84 | { |
| 85 | int err; |
| 86 | const struct sysctlnode *rnode; |
| 87 | const struct sysctlnode *cnode; |
| 88 | |
| 89 | err = sysctl_createv(clog, 0, NULL, &rnode, |
| 90 | CTLFLAG_PERMANENT, CTLTYPE_NODE, "ucom" , |
| 91 | SYSCTL_DESCR("ucom global controls" ), |
| 92 | NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); |
| 93 | |
| 94 | if (err) |
| 95 | goto fail; |
| 96 | |
| 97 | /* control debugging printfs */ |
| 98 | err = sysctl_createv(clog, 0, &rnode, &cnode, |
| 99 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, |
| 100 | "debug" , SYSCTL_DESCR("Enable debugging output" ), |
| 101 | NULL, 0, &ucomdebug, sizeof(ucomdebug), CTL_CREATE, CTL_EOL); |
| 102 | if (err) |
| 103 | goto fail; |
| 104 | |
| 105 | return; |
| 106 | fail: |
| 107 | aprint_error("%s: sysctl_createv failed (err = %d)\n" , __func__, err); |
| 108 | } |
| 109 | |
| 110 | #endif /* UCOM_DEBUG */ |
| 111 | #endif /* USB_DEBUG */ |
| 112 | |
| 113 | #define DPRINTF(FMT,A,B,C,D) USBHIST_LOGN(ucomdebug,1,FMT,A,B,C,D) |
| 114 | #define DPRINTFN(N,FMT,A,B,C,D) USBHIST_LOGN(ucomdebug,N,FMT,A,B,C,D) |
| 115 | #define UCOMHIST_FUNC() USBHIST_FUNC() |
| 116 | #define UCOMHIST_CALLED(name) USBHIST_CALLED(ucomdebug) |
| 117 | |
| 118 | #define UCOMCALLUNIT_MASK TTCALLUNIT_MASK |
| 119 | #define UCOMUNIT_MASK TTUNIT_MASK |
| 120 | #define UCOMDIALOUT_MASK TTDIALOUT_MASK |
| 121 | |
| 122 | #define UCOMCALLUNIT(x) TTCALLUNIT(x) |
| 123 | #define UCOMUNIT(x) TTUNIT(x) |
| 124 | #define UCOMDIALOUT(x) TTDIALOUT(x) |
| 125 | |
| 126 | /* |
| 127 | * XXX: We can submit multiple input/output buffers to the usb stack |
| 128 | * to improve throughput, but the usb stack is too lame to deal with this |
| 129 | * in a number of places. |
| 130 | */ |
| 131 | #define UCOM_IN_BUFFS 1 |
| 132 | #define UCOM_OUT_BUFFS 1 |
| 133 | |
| 134 | struct ucom_buffer { |
| 135 | SIMPLEQ_ENTRY(ucom_buffer) ub_link; |
| 136 | struct usbd_xfer *ub_xfer; |
| 137 | u_char *ub_data; |
| 138 | u_int ub_len; |
| 139 | u_int ub_index; |
| 140 | }; |
| 141 | |
| 142 | struct ucom_softc { |
| 143 | device_t sc_dev; /* base device */ |
| 144 | |
| 145 | struct usbd_device * sc_udev; /* USB device */ |
| 146 | struct usbd_interface * sc_iface; /* data interface */ |
| 147 | |
| 148 | int sc_bulkin_no; /* bulk in endpoint address */ |
| 149 | struct usbd_pipe * sc_bulkin_pipe;/* bulk in pipe */ |
| 150 | u_int sc_ibufsize; /* read buffer size */ |
| 151 | u_int sc_ibufsizepad; /* read buffer size padded */ |
| 152 | struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; |
| 153 | SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; |
| 154 | SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; |
| 155 | |
| 156 | int sc_bulkout_no; /* bulk out endpoint address */ |
| 157 | struct usbd_pipe * sc_bulkout_pipe;/* bulk out pipe */ |
| 158 | u_int sc_obufsize; /* write buffer size */ |
| 159 | u_int sc_opkthdrlen; /* header length of */ |
| 160 | struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; |
| 161 | SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; |
| 162 | SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; |
| 163 | |
| 164 | void *sc_si; |
| 165 | |
| 166 | const struct ucom_methods *sc_methods; |
| 167 | void *sc_parent; |
| 168 | int sc_portno; |
| 169 | |
| 170 | struct tty *sc_tty; /* our tty */ |
| 171 | u_char sc_lsr; |
| 172 | u_char sc_msr; |
| 173 | u_char sc_mcr; |
| 174 | volatile u_char sc_rx_stopped; |
| 175 | u_char sc_rx_unblock; |
| 176 | u_char sc_tx_stopped; |
| 177 | int sc_swflags; |
| 178 | |
| 179 | enum ucom_state { |
| 180 | UCOM_DEAD, |
| 181 | UCOM_ATTACHED, |
| 182 | UCOM_OPENING, |
| 183 | UCOM_CLOSING, |
| 184 | UCOM_OPEN |
| 185 | } sc_state; |
| 186 | int sc_refcnt; |
| 187 | bool sc_dying; /* disconnecting */ |
| 188 | |
| 189 | struct pps_state sc_pps_state; /* pps state */ |
| 190 | |
| 191 | krndsource_t sc_rndsource; /* random source */ |
| 192 | |
| 193 | kmutex_t sc_lock; |
| 194 | kcondvar_t sc_statecv; |
| 195 | kcondvar_t sc_detachcv; |
| 196 | }; |
| 197 | |
| 198 | dev_type_open(ucomopen); |
| 199 | dev_type_close(ucomclose); |
| 200 | dev_type_read(ucomread); |
| 201 | dev_type_write(ucomwrite); |
| 202 | dev_type_ioctl(ucomioctl); |
| 203 | dev_type_stop(ucomstop); |
| 204 | dev_type_tty(ucomtty); |
| 205 | dev_type_poll(ucompoll); |
| 206 | |
| 207 | const struct cdevsw ucom_cdevsw = { |
| 208 | .d_open = ucomopen, |
| 209 | .d_close = ucomclose, |
| 210 | .d_read = ucomread, |
| 211 | .d_write = ucomwrite, |
| 212 | .d_ioctl = ucomioctl, |
| 213 | .d_stop = ucomstop, |
| 214 | .d_tty = ucomtty, |
| 215 | .d_poll = ucompoll, |
| 216 | .d_mmap = nommap, |
| 217 | .d_kqfilter = ttykqfilter, |
| 218 | .d_discard = nodiscard, |
| 219 | .d_flag = D_TTY | D_MPSAFE |
| 220 | }; |
| 221 | |
| 222 | static void ucom_cleanup(struct ucom_softc *); |
| 223 | static int ucomparam(struct tty *, struct termios *); |
| 224 | static int ucomhwiflow(struct tty *, int); |
| 225 | static void ucomstart(struct tty *); |
| 226 | static void ucom_shutdown(struct ucom_softc *); |
| 227 | static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, |
| 228 | int, struct lwp *); |
| 229 | static void ucom_dtr(struct ucom_softc *, int); |
| 230 | static void ucom_rts(struct ucom_softc *, int); |
| 231 | static void ucom_break(struct ucom_softc *, int); |
| 232 | static void tiocm_to_ucom(struct ucom_softc *, u_long, int); |
| 233 | static int ucom_to_tiocm(struct ucom_softc *); |
| 234 | |
| 235 | static void ucomreadcb(struct usbd_xfer *, void *, usbd_status); |
| 236 | static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); |
| 237 | static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, |
| 238 | usbd_status); |
| 239 | |
| 240 | static void ucomwritecb(struct usbd_xfer *, void *, usbd_status); |
| 241 | static void ucom_read_complete(struct ucom_softc *); |
| 242 | static int ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); |
| 243 | static void ucom_softintr(void *); |
| 244 | |
| 245 | int ucom_match(device_t, cfdata_t, void *); |
| 246 | void ucom_attach(device_t, device_t, void *); |
| 247 | int ucom_detach(device_t, int); |
| 248 | int ucom_activate(device_t, enum devact); |
| 249 | extern struct cfdriver ucom_cd; |
| 250 | CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, |
| 251 | ucom_detach, ucom_activate); |
| 252 | |
| 253 | int |
| 254 | ucom_match(device_t parent, cfdata_t match, void *aux) |
| 255 | { |
| 256 | return 1; |
| 257 | } |
| 258 | |
| 259 | void |
| 260 | ucom_attach(device_t parent, device_t self, void *aux) |
| 261 | { |
| 262 | struct ucom_softc *sc = device_private(self); |
| 263 | struct ucom_attach_args *ucaa = aux; |
| 264 | |
| 265 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 266 | |
| 267 | if (ucaa->ucaa_info != NULL) |
| 268 | aprint_normal(": %s" , ucaa->ucaa_info); |
| 269 | aprint_normal("\n" ); |
| 270 | |
| 271 | prop_dictionary_set_int32(device_properties(self), "port" , |
| 272 | ucaa->ucaa_portno); |
| 273 | |
| 274 | sc->sc_dev = self; |
| 275 | sc->sc_udev = ucaa->ucaa_device; |
| 276 | sc->sc_iface = ucaa->ucaa_iface; |
| 277 | sc->sc_bulkout_no = ucaa->ucaa_bulkout; |
| 278 | sc->sc_bulkin_no = ucaa->ucaa_bulkin; |
| 279 | sc->sc_ibufsize = ucaa->ucaa_ibufsize; |
| 280 | sc->sc_ibufsizepad = ucaa->ucaa_ibufsizepad; |
| 281 | sc->sc_obufsize = ucaa->ucaa_obufsize; |
| 282 | sc->sc_opkthdrlen = ucaa->ucaa_opkthdrlen; |
| 283 | sc->sc_methods = ucaa->ucaa_methods; |
| 284 | sc->sc_parent = ucaa->ucaa_arg; |
| 285 | sc->sc_portno = ucaa->ucaa_portno; |
| 286 | |
| 287 | sc->sc_lsr = 0; |
| 288 | sc->sc_msr = 0; |
| 289 | sc->sc_mcr = 0; |
| 290 | sc->sc_tx_stopped = 0; |
| 291 | sc->sc_swflags = 0; |
| 292 | sc->sc_refcnt = 0; |
| 293 | sc->sc_dying = false; |
| 294 | sc->sc_state = UCOM_DEAD; |
| 295 | |
| 296 | sc->sc_si = softint_establish(SOFTINT_USB, ucom_softintr, sc); |
| 297 | mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); |
| 298 | cv_init(&sc->sc_statecv, "ucomstate" ); |
| 299 | cv_init(&sc->sc_detachcv, "ucomdtch" ); |
| 300 | |
| 301 | SIMPLEQ_INIT(&sc->sc_ibuff_empty); |
| 302 | SIMPLEQ_INIT(&sc->sc_ibuff_full); |
| 303 | SIMPLEQ_INIT(&sc->sc_obuff_free); |
| 304 | SIMPLEQ_INIT(&sc->sc_obuff_full); |
| 305 | |
| 306 | memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); |
| 307 | memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); |
| 308 | |
| 309 | DPRINTF("open pipes in=%d out=%d" , sc->sc_bulkin_no, sc->sc_bulkout_no, |
| 310 | 0, 0); |
| 311 | |
| 312 | struct ucom_buffer *ub; |
| 313 | usbd_status err; |
| 314 | int error; |
| 315 | |
| 316 | /* Open the bulk pipes */ |
| 317 | err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, |
| 318 | USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); |
| 319 | if (err) { |
| 320 | DPRINTF("open bulk in error (addr %d), err=%d" , |
| 321 | sc->sc_bulkin_no, err, 0, 0); |
| 322 | error = EIO; |
| 323 | goto fail_0; |
| 324 | } |
| 325 | /* Allocate input buffers */ |
| 326 | for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; |
| 327 | ub++) { |
| 328 | error = usbd_create_xfer(sc->sc_bulkin_pipe, |
| 329 | sc->sc_ibufsizepad, USBD_SHORT_XFER_OK, 0, |
| 330 | &ub->ub_xfer); |
| 331 | if (error) |
| 332 | goto fail_1; |
| 333 | ub->ub_data = usbd_get_buffer(ub->ub_xfer); |
| 334 | } |
| 335 | |
| 336 | err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, |
| 337 | USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); |
| 338 | if (err) { |
| 339 | DPRINTF("open bulk out error (addr %d), err=%d" , |
| 340 | sc->sc_bulkout_no, err, 0, 0); |
| 341 | error = EIO; |
| 342 | goto fail_1; |
| 343 | } |
| 344 | for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; |
| 345 | ub++) { |
| 346 | error = usbd_create_xfer(sc->sc_bulkout_pipe, |
| 347 | sc->sc_obufsize, 0, 0, &ub->ub_xfer); |
| 348 | if (error) |
| 349 | goto fail_2; |
| 350 | ub->ub_data = usbd_get_buffer(ub->ub_xfer); |
| 351 | SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); |
| 352 | } |
| 353 | |
| 354 | struct tty *tp = tty_alloc(); |
| 355 | tp->t_oproc = ucomstart; |
| 356 | tp->t_param = ucomparam; |
| 357 | tp->t_hwiflow = ucomhwiflow; |
| 358 | sc->sc_tty = tp; |
| 359 | |
| 360 | DPRINTF("tty_attach %p" , tp, 0, 0, 0); |
| 361 | tty_attach(tp); |
| 362 | |
| 363 | rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), |
| 364 | RND_TYPE_TTY, RND_FLAG_DEFAULT); |
| 365 | |
| 366 | if (!pmf_device_register(self, NULL, NULL)) |
| 367 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 368 | |
| 369 | sc->sc_state = UCOM_ATTACHED; |
| 370 | |
| 371 | return; |
| 372 | |
| 373 | fail_2: |
| 374 | for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; |
| 375 | ub++) { |
| 376 | if (ub->ub_xfer) |
| 377 | usbd_destroy_xfer(ub->ub_xfer); |
| 378 | } |
| 379 | |
| 380 | usbd_close_pipe(sc->sc_bulkout_pipe); |
| 381 | |
| 382 | fail_1: |
| 383 | for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; |
| 384 | ub++) { |
| 385 | if (ub->ub_xfer) |
| 386 | usbd_destroy_xfer(ub->ub_xfer); |
| 387 | } |
| 388 | usbd_close_pipe(sc->sc_bulkin_pipe); |
| 389 | |
| 390 | fail_0: |
| 391 | aprint_error_dev(self, "attach failed, error=%d\n" , error); |
| 392 | |
| 393 | return; |
| 394 | } |
| 395 | |
| 396 | int |
| 397 | ucom_detach(device_t self, int flags) |
| 398 | { |
| 399 | struct ucom_softc *sc = device_private(self); |
| 400 | struct tty *tp = sc->sc_tty; |
| 401 | int maj, mn; |
| 402 | int i; |
| 403 | |
| 404 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 405 | |
| 406 | DPRINTF("sc=%p flags=%d tp=%p" , sc, flags, tp, 0); |
| 407 | DPRINTF("... pipe=%d,%d" , sc->sc_bulkin_no, sc->sc_bulkout_no, 0, 0); |
| 408 | |
| 409 | mutex_enter(&sc->sc_lock); |
| 410 | sc->sc_dying = true; |
| 411 | mutex_exit(&sc->sc_lock); |
| 412 | |
| 413 | pmf_device_deregister(self); |
| 414 | |
| 415 | if (sc->sc_bulkin_pipe != NULL) |
| 416 | usbd_abort_pipe(sc->sc_bulkin_pipe); |
| 417 | if (sc->sc_bulkout_pipe != NULL) |
| 418 | usbd_abort_pipe(sc->sc_bulkout_pipe); |
| 419 | |
| 420 | mutex_enter(&sc->sc_lock); |
| 421 | |
| 422 | /* wait for open/close to finish */ |
| 423 | while (sc->sc_state == UCOM_OPENING || sc->sc_state == UCOM_CLOSING) { |
| 424 | int error = cv_wait_sig(&sc->sc_statecv, &sc->sc_lock); |
| 425 | |
| 426 | if (error) { |
| 427 | mutex_exit(&sc->sc_lock); |
| 428 | return error; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | sc->sc_refcnt--; |
| 433 | while (sc->sc_refcnt > 0) { |
| 434 | /* Wake up anyone waiting */ |
| 435 | if (tp != NULL) { |
| 436 | mutex_spin_enter(&tty_lock); |
| 437 | CLR(tp->t_state, TS_CARR_ON); |
| 438 | CLR(tp->t_cflag, CLOCAL | MDMBUF); |
| 439 | ttyflush(tp, FREAD|FWRITE); |
| 440 | mutex_spin_exit(&tty_lock); |
| 441 | } |
| 442 | /* Wait for processes to go away. */ |
| 443 | if (cv_timedwait(&sc->sc_detachcv, &sc->sc_lock, hz * 60)) { |
| 444 | printf("%s: %s didn't detach\n" , __func__, |
| 445 | device_xname(sc->sc_dev)); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | softint_disestablish(sc->sc_si); |
| 450 | mutex_exit(&sc->sc_lock); |
| 451 | |
| 452 | /* locate the major number */ |
| 453 | maj = cdevsw_lookup_major(&ucom_cdevsw); |
| 454 | |
| 455 | /* Nuke the vnodes for any open instances. */ |
| 456 | mn = device_unit(self); |
| 457 | DPRINTF("maj=%d mn=%d" , maj, mn, 0, 0); |
| 458 | vdevgone(maj, mn, mn, VCHR); |
| 459 | vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); |
| 460 | vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); |
| 461 | |
| 462 | /* Detach and free the tty. */ |
| 463 | if (tp != NULL) { |
| 464 | tty_detach(tp); |
| 465 | tty_free(tp); |
| 466 | sc->sc_tty = NULL; |
| 467 | } |
| 468 | |
| 469 | for (i = 0; i < UCOM_IN_BUFFS; i++) { |
| 470 | if (sc->sc_ibuff[i].ub_xfer != NULL) |
| 471 | usbd_destroy_xfer(sc->sc_ibuff[i].ub_xfer); |
| 472 | } |
| 473 | |
| 474 | for (i = 0; i < UCOM_OUT_BUFFS; i++) { |
| 475 | if (sc->sc_obuff[i].ub_xfer != NULL) |
| 476 | usbd_destroy_xfer(sc->sc_obuff[i].ub_xfer); |
| 477 | } |
| 478 | |
| 479 | if (sc->sc_bulkin_pipe != NULL) { |
| 480 | usbd_close_pipe(sc->sc_bulkin_pipe); |
| 481 | sc->sc_bulkin_pipe = NULL; |
| 482 | } |
| 483 | |
| 484 | if (sc->sc_bulkout_pipe != NULL) { |
| 485 | usbd_close_pipe(sc->sc_bulkout_pipe); |
| 486 | sc->sc_bulkout_pipe = NULL; |
| 487 | } |
| 488 | |
| 489 | /* Detach the random source */ |
| 490 | rnd_detach_source(&sc->sc_rndsource); |
| 491 | |
| 492 | mutex_destroy(&sc->sc_lock); |
| 493 | cv_destroy(&sc->sc_statecv); |
| 494 | cv_destroy(&sc->sc_detachcv); |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | int |
| 500 | ucom_activate(device_t self, enum devact act) |
| 501 | { |
| 502 | struct ucom_softc *sc = device_private(self); |
| 503 | |
| 504 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 505 | |
| 506 | DPRINTFN(5, "%d" , act, 0, 0, 0); |
| 507 | |
| 508 | switch (act) { |
| 509 | case DVACT_DEACTIVATE: |
| 510 | mutex_enter(&sc->sc_lock); |
| 511 | sc->sc_dying = true; |
| 512 | mutex_exit(&sc->sc_lock); |
| 513 | return 0; |
| 514 | default: |
| 515 | return EOPNOTSUPP; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | void |
| 520 | ucom_shutdown(struct ucom_softc *sc) |
| 521 | { |
| 522 | struct tty *tp = sc->sc_tty; |
| 523 | |
| 524 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 525 | |
| 526 | KASSERT(mutex_owned(&sc->sc_lock)); |
| 527 | /* |
| 528 | * Hang up if necessary. Wait a bit, so the other side has time to |
| 529 | * notice even if we immediately open the port again. |
| 530 | */ |
| 531 | if (ISSET(tp->t_cflag, HUPCL)) { |
| 532 | ucom_dtr(sc, 0); |
| 533 | /* XXX will only timeout */ |
| 534 | (void) kpause(ttclos, false, hz, &sc->sc_lock); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | int |
| 539 | ucomopen(dev_t dev, int flag, int mode, struct lwp *l) |
| 540 | { |
| 541 | const int unit = UCOMUNIT(dev); |
| 542 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 543 | int error = 0; |
| 544 | |
| 545 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 546 | |
| 547 | if (sc == NULL) |
| 548 | return ENXIO; |
| 549 | |
| 550 | mutex_enter(&sc->sc_lock); |
| 551 | if (sc->sc_dying) { |
| 552 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 553 | mutex_exit(&sc->sc_lock); |
| 554 | return EIO; |
| 555 | } |
| 556 | |
| 557 | if (!device_is_active(sc->sc_dev)) { |
| 558 | mutex_exit(&sc->sc_lock); |
| 559 | return ENXIO; |
| 560 | } |
| 561 | |
| 562 | struct tty *tp = sc->sc_tty; |
| 563 | |
| 564 | DPRINTF("unit=%d, tp=%p" , unit, tp, 0, 0); |
| 565 | |
| 566 | if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) { |
| 567 | mutex_exit(&sc->sc_lock); |
| 568 | return EBUSY; |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Wait while the device is initialized by the |
| 573 | * first opener or cleaned up by the last closer. |
| 574 | */ |
| 575 | while (sc->sc_state == UCOM_OPENING || sc->sc_state == UCOM_CLOSING) { |
| 576 | error = cv_wait_sig(&sc->sc_statecv, &sc->sc_lock); |
| 577 | |
| 578 | if (sc->sc_dying) |
| 579 | error = EIO; |
| 580 | |
| 581 | if (error) { |
| 582 | mutex_exit(&sc->sc_lock); |
| 583 | return error; |
| 584 | } |
| 585 | } |
| 586 | enum ucom_state state = sc->sc_state; |
| 587 | |
| 588 | KASSERTMSG(state == UCOM_OPEN || state == UCOM_ATTACHED, |
| 589 | "state is %d" , state); |
| 590 | |
| 591 | bool cleanup = false; |
| 592 | /* If this is the first open then perform the initialisation */ |
| 593 | if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { |
| 594 | KASSERT(state == UCOM_ATTACHED); |
| 595 | tp->t_dev = dev; |
| 596 | cleanup = true; |
| 597 | sc->sc_state = UCOM_OPENING; |
| 598 | |
| 599 | mutex_exit(&sc->sc_lock); |
| 600 | if (sc->sc_methods->ucom_open != NULL) { |
| 601 | error = sc->sc_methods->ucom_open(sc->sc_parent, |
| 602 | sc->sc_portno); |
| 603 | if (error) { |
| 604 | goto fail_2; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | ucom_status_change(sc); |
| 609 | |
| 610 | /* Clear PPS capture state on first open. */ |
| 611 | mutex_spin_enter(&timecounter_lock); |
| 612 | memset(&sc->sc_pps_state, 0, sizeof(sc->sc_pps_state)); |
| 613 | sc->sc_pps_state.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; |
| 614 | pps_init(&sc->sc_pps_state); |
| 615 | mutex_spin_exit(&timecounter_lock); |
| 616 | |
| 617 | /* |
| 618 | * Initialize the termios status to the defaults. Add in the |
| 619 | * sticky bits from TIOCSFLAGS. |
| 620 | */ |
| 621 | struct termios t; |
| 622 | |
| 623 | t.c_ispeed = 0; |
| 624 | t.c_ospeed = TTYDEF_SPEED; |
| 625 | t.c_cflag = TTYDEF_CFLAG; |
| 626 | if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) |
| 627 | SET(t.c_cflag, CLOCAL); |
| 628 | if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) |
| 629 | SET(t.c_cflag, CRTSCTS); |
| 630 | if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) |
| 631 | SET(t.c_cflag, MDMBUF); |
| 632 | /* Make sure ucomparam() will do something. */ |
| 633 | tp->t_ospeed = 0; |
| 634 | (void) ucomparam(tp, &t); |
| 635 | tp->t_iflag = TTYDEF_IFLAG; |
| 636 | tp->t_oflag = TTYDEF_OFLAG; |
| 637 | tp->t_lflag = TTYDEF_LFLAG; |
| 638 | ttychars(tp); |
| 639 | ttsetwater(tp); |
| 640 | |
| 641 | /* |
| 642 | * Turn on DTR. We must always do this, even if carrier is not |
| 643 | * present, because otherwise we'd have to use TIOCSDTR |
| 644 | * immediately after setting CLOCAL, which applications do not |
| 645 | * expect. We always assert DTR while the device is open |
| 646 | * unless explicitly requested to deassert it. Ditto RTS. |
| 647 | */ |
| 648 | ucom_dtr(sc, 1); |
| 649 | ucom_rts(sc, 1); |
| 650 | |
| 651 | mutex_enter(&sc->sc_lock); |
| 652 | if (sc->sc_dying) { |
| 653 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 654 | error = EIO; |
| 655 | goto fail_1; |
| 656 | } |
| 657 | |
| 658 | sc->sc_rx_unblock = 0; |
| 659 | sc->sc_rx_stopped = 0; |
| 660 | sc->sc_tx_stopped = 0; |
| 661 | |
| 662 | for (size_t i = 0; i < UCOM_IN_BUFFS; i++) { |
| 663 | struct ucom_buffer *ub = &sc->sc_ibuff[i]; |
| 664 | error = ucomsubmitread(sc, ub); |
| 665 | if (error) { |
| 666 | mutex_exit(&sc->sc_lock); |
| 667 | goto fail_2; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | sc->sc_state = UCOM_OPEN; |
| 672 | cv_signal(&sc->sc_statecv); |
| 673 | mutex_exit(&sc->sc_lock); |
| 674 | |
| 675 | DPRINTF("unit=%d, tp=%p dialout %d nonblock %d" , unit, tp, |
| 676 | !!UCOMDIALOUT(dev), !!ISSET(flag, O_NONBLOCK)); |
| 677 | error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); |
| 678 | if (error) |
| 679 | goto bad; |
| 680 | |
| 681 | error = (*tp->t_linesw->l_open)(dev, tp); |
| 682 | if (error) |
| 683 | goto bad; |
| 684 | |
| 685 | return 0; |
| 686 | |
| 687 | bad: |
| 688 | cleanup = !ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0; |
| 689 | |
| 690 | fail_2: |
| 691 | if (cleanup) { |
| 692 | /* |
| 693 | * We failed to open the device, and nobody else had |
| 694 | * it opened. Clean up the state as appropriate. |
| 695 | */ |
| 696 | ucom_cleanup(sc); |
| 697 | } |
| 698 | |
| 699 | mutex_enter(&sc->sc_lock); |
| 700 | |
| 701 | fail_1: |
| 702 | sc->sc_state = state; |
| 703 | cv_signal(&sc->sc_statecv); |
| 704 | mutex_exit(&sc->sc_lock); |
| 705 | |
| 706 | return error; |
| 707 | } |
| 708 | |
| 709 | int |
| 710 | ucomclose(dev_t dev, int flag, int mode, struct lwp *l) |
| 711 | { |
| 712 | const int unit = UCOMUNIT(dev); |
| 713 | struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); |
| 714 | int error = 0; |
| 715 | |
| 716 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 717 | |
| 718 | DPRINTF("unit=%d" , UCOMUNIT(dev), 0, 0, 0); |
| 719 | |
| 720 | if (sc == NULL) |
| 721 | return 0; |
| 722 | |
| 723 | mutex_enter(&sc->sc_lock); |
| 724 | if (sc->sc_dying) { |
| 725 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 726 | mutex_exit(&sc->sc_lock); |
| 727 | return ENXIO; |
| 728 | } |
| 729 | |
| 730 | /* |
| 731 | * Wait until any opens/closes have finished |
| 732 | */ |
| 733 | while (sc->sc_state == UCOM_OPENING || sc->sc_state == UCOM_CLOSING) { |
| 734 | error = cv_wait_sig(&sc->sc_statecv, &sc->sc_lock); |
| 735 | |
| 736 | if (sc->sc_dying) |
| 737 | error = EIO; |
| 738 | |
| 739 | if (error) { |
| 740 | mutex_exit(&sc->sc_lock); |
| 741 | return error; |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | struct tty *tp = sc->sc_tty; |
| 746 | |
| 747 | if (!ISSET(tp->t_state, TS_ISOPEN)) { |
| 748 | KASSERT(sc->sc_state == UCOM_ATTACHED); |
| 749 | mutex_exit(&sc->sc_lock); |
| 750 | return 0; |
| 751 | } |
| 752 | |
| 753 | KASSERT(sc->sc_state == UCOM_OPEN); |
| 754 | sc->sc_state = UCOM_CLOSING; |
| 755 | mutex_exit(&sc->sc_lock); |
| 756 | |
| 757 | (*tp->t_linesw->l_close)(tp, flag); |
| 758 | ttyclose(tp); |
| 759 | |
| 760 | /* state when we're done - default to open */ |
| 761 | enum ucom_state state = UCOM_OPEN; |
| 762 | if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { |
| 763 | /* |
| 764 | * Although we got a last close, the device may still be in |
| 765 | * use; e.g. if this was the dialout node, and there are still |
| 766 | * processes waiting for carrier on the non-dialout node. |
| 767 | */ |
| 768 | ucom_cleanup(sc); |
| 769 | if (sc->sc_methods->ucom_close != NULL) |
| 770 | sc->sc_methods->ucom_close(sc->sc_parent, |
| 771 | sc->sc_portno); |
| 772 | state = UCOM_ATTACHED; |
| 773 | } |
| 774 | |
| 775 | mutex_enter(&sc->sc_lock); |
| 776 | sc->sc_state = state; |
| 777 | cv_signal(&sc->sc_statecv); |
| 778 | mutex_exit(&sc->sc_lock); |
| 779 | |
| 780 | return error; |
| 781 | } |
| 782 | |
| 783 | int |
| 784 | ucomread(dev_t dev, struct uio *uio, int flag) |
| 785 | { |
| 786 | const int unit = UCOMUNIT(dev); |
| 787 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 788 | int error; |
| 789 | |
| 790 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 791 | |
| 792 | if (sc == NULL) |
| 793 | return EIO; |
| 794 | |
| 795 | mutex_enter(&sc->sc_lock); |
| 796 | if (sc->sc_dying) { |
| 797 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 798 | mutex_exit(&sc->sc_lock); |
| 799 | return EIO; |
| 800 | } |
| 801 | |
| 802 | struct tty *tp = sc->sc_tty; |
| 803 | |
| 804 | sc->sc_refcnt++; |
| 805 | mutex_exit(&sc->sc_lock); |
| 806 | |
| 807 | error = ((*tp->t_linesw->l_read)(tp, uio, flag)); |
| 808 | |
| 809 | mutex_enter(&sc->sc_lock); |
| 810 | if (--sc->sc_refcnt < 0) |
| 811 | cv_broadcast(&sc->sc_detachcv); |
| 812 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(dev), sc->sc_refcnt, 0, 0); |
| 813 | mutex_exit(&sc->sc_lock); |
| 814 | |
| 815 | return error; |
| 816 | } |
| 817 | |
| 818 | int |
| 819 | ucomwrite(dev_t dev, struct uio *uio, int flag) |
| 820 | { |
| 821 | const int unit = UCOMUNIT(dev); |
| 822 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 823 | int error; |
| 824 | |
| 825 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 826 | |
| 827 | if (sc == NULL) |
| 828 | return EIO; |
| 829 | |
| 830 | mutex_enter(&sc->sc_lock); |
| 831 | if (sc->sc_dying) { |
| 832 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 833 | mutex_exit(&sc->sc_lock); |
| 834 | return EIO; |
| 835 | } |
| 836 | |
| 837 | struct tty *tp = sc->sc_tty; |
| 838 | |
| 839 | sc->sc_refcnt++; |
| 840 | mutex_exit(&sc->sc_lock); |
| 841 | |
| 842 | error = ((*tp->t_linesw->l_write)(tp, uio, flag)); |
| 843 | |
| 844 | mutex_enter(&sc->sc_lock); |
| 845 | if (--sc->sc_refcnt < 0) |
| 846 | cv_broadcast(&sc->sc_detachcv); |
| 847 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(dev), sc->sc_refcnt, 0, 0); |
| 848 | mutex_exit(&sc->sc_lock); |
| 849 | |
| 850 | return error; |
| 851 | } |
| 852 | |
| 853 | int |
| 854 | ucompoll(dev_t dev, int events, struct lwp *l) |
| 855 | { |
| 856 | const int unit = UCOMUNIT(dev); |
| 857 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 858 | |
| 859 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 860 | |
| 861 | if (sc == NULL) |
| 862 | return POLLHUP; |
| 863 | |
| 864 | mutex_enter(&sc->sc_lock); |
| 865 | if (sc->sc_dying) { |
| 866 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 867 | mutex_exit(&sc->sc_lock); |
| 868 | return POLLHUP; |
| 869 | } |
| 870 | struct tty *tp = sc->sc_tty; |
| 871 | |
| 872 | sc->sc_refcnt++; |
| 873 | mutex_exit(&sc->sc_lock); |
| 874 | |
| 875 | int revents = ((*tp->t_linesw->l_poll)(tp, events, l)); |
| 876 | |
| 877 | mutex_enter(&sc->sc_lock); |
| 878 | if (--sc->sc_refcnt < 0) |
| 879 | cv_broadcast(&sc->sc_detachcv); |
| 880 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(dev), sc->sc_refcnt, 0, 0); |
| 881 | mutex_exit(&sc->sc_lock); |
| 882 | |
| 883 | return revents; |
| 884 | } |
| 885 | |
| 886 | struct tty * |
| 887 | ucomtty(dev_t dev) |
| 888 | { |
| 889 | const int unit = UCOMUNIT(dev); |
| 890 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 891 | |
| 892 | return sc != NULL ? sc->sc_tty : NULL; |
| 893 | } |
| 894 | |
| 895 | int |
| 896 | ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) |
| 897 | { |
| 898 | const int unit = UCOMUNIT(dev); |
| 899 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 900 | int error; |
| 901 | |
| 902 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 903 | |
| 904 | if (sc == NULL) |
| 905 | return EIO; |
| 906 | |
| 907 | mutex_enter(&sc->sc_lock); |
| 908 | if (sc->sc_dying) { |
| 909 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 910 | mutex_exit(&sc->sc_lock); |
| 911 | return EIO; |
| 912 | } |
| 913 | |
| 914 | sc->sc_refcnt++; |
| 915 | mutex_exit(&sc->sc_lock); |
| 916 | |
| 917 | error = ucom_do_ioctl(sc, cmd, data, flag, l); |
| 918 | |
| 919 | mutex_enter(&sc->sc_lock); |
| 920 | if (--sc->sc_refcnt < 0) |
| 921 | cv_broadcast(&sc->sc_detachcv); |
| 922 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(dev), sc->sc_refcnt, 0, 0); |
| 923 | mutex_exit(&sc->sc_lock); |
| 924 | |
| 925 | return error; |
| 926 | } |
| 927 | |
| 928 | static int |
| 929 | ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, int flag, |
| 930 | struct lwp *l) |
| 931 | { |
| 932 | struct tty *tp = sc->sc_tty; |
| 933 | int error; |
| 934 | |
| 935 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 936 | |
| 937 | DPRINTF("cmd=0x%08lx" , cmd, 0, 0, 0); |
| 938 | |
| 939 | error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); |
| 940 | if (error != EPASSTHROUGH) |
| 941 | return error; |
| 942 | |
| 943 | error = ttioctl(tp, cmd, data, flag, l); |
| 944 | if (error != EPASSTHROUGH) |
| 945 | return error; |
| 946 | |
| 947 | if (sc->sc_methods->ucom_ioctl != NULL) { |
| 948 | error = sc->sc_methods->ucom_ioctl(sc->sc_parent, |
| 949 | sc->sc_portno, cmd, data, flag, l->l_proc); |
| 950 | if (error != EPASSTHROUGH) |
| 951 | return error; |
| 952 | } |
| 953 | |
| 954 | error = 0; |
| 955 | |
| 956 | DPRINTF("our cmd=0x%08lx" , cmd, 0, 0, 0); |
| 957 | |
| 958 | switch (cmd) { |
| 959 | case TIOCSBRK: |
| 960 | ucom_break(sc, 1); |
| 961 | break; |
| 962 | |
| 963 | case TIOCCBRK: |
| 964 | ucom_break(sc, 0); |
| 965 | break; |
| 966 | |
| 967 | case TIOCSDTR: |
| 968 | ucom_dtr(sc, 1); |
| 969 | break; |
| 970 | |
| 971 | case TIOCCDTR: |
| 972 | ucom_dtr(sc, 0); |
| 973 | break; |
| 974 | |
| 975 | case TIOCGFLAGS: |
| 976 | mutex_enter(&sc->sc_lock); |
| 977 | *(int *)data = sc->sc_swflags; |
| 978 | mutex_exit(&sc->sc_lock); |
| 979 | break; |
| 980 | |
| 981 | case TIOCSFLAGS: |
| 982 | error = kauth_authorize_device_tty(l->l_cred, |
| 983 | KAUTH_DEVICE_TTY_PRIVSET, tp); |
| 984 | if (error) |
| 985 | break; |
| 986 | mutex_enter(&sc->sc_lock); |
| 987 | sc->sc_swflags = *(int *)data; |
| 988 | mutex_exit(&sc->sc_lock); |
| 989 | break; |
| 990 | |
| 991 | case TIOCMSET: |
| 992 | case TIOCMBIS: |
| 993 | case TIOCMBIC: |
| 994 | tiocm_to_ucom(sc, cmd, *(int *)data); |
| 995 | break; |
| 996 | |
| 997 | case TIOCMGET: |
| 998 | *(int *)data = ucom_to_tiocm(sc); |
| 999 | break; |
| 1000 | |
| 1001 | case PPS_IOC_CREATE: |
| 1002 | case PPS_IOC_DESTROY: |
| 1003 | case PPS_IOC_GETPARAMS: |
| 1004 | case PPS_IOC_SETPARAMS: |
| 1005 | case PPS_IOC_GETCAP: |
| 1006 | case PPS_IOC_FETCH: |
| 1007 | #ifdef PPS_SYNC |
| 1008 | case PPS_IOC_KCBIND: |
| 1009 | #endif |
| 1010 | mutex_spin_enter(&timecounter_lock); |
| 1011 | error = pps_ioctl(cmd, data, &sc->sc_pps_state); |
| 1012 | mutex_spin_exit(&timecounter_lock); |
| 1013 | break; |
| 1014 | |
| 1015 | default: |
| 1016 | error = EPASSTHROUGH; |
| 1017 | break; |
| 1018 | } |
| 1019 | |
| 1020 | return error; |
| 1021 | } |
| 1022 | |
| 1023 | static void |
| 1024 | tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) |
| 1025 | { |
| 1026 | u_char combits; |
| 1027 | |
| 1028 | combits = 0; |
| 1029 | if (ISSET(ttybits, TIOCM_DTR)) |
| 1030 | SET(combits, UMCR_DTR); |
| 1031 | if (ISSET(ttybits, TIOCM_RTS)) |
| 1032 | SET(combits, UMCR_RTS); |
| 1033 | |
| 1034 | mutex_enter(&sc->sc_lock); |
| 1035 | switch (how) { |
| 1036 | case TIOCMBIC: |
| 1037 | CLR(sc->sc_mcr, combits); |
| 1038 | break; |
| 1039 | |
| 1040 | case TIOCMBIS: |
| 1041 | SET(sc->sc_mcr, combits); |
| 1042 | break; |
| 1043 | |
| 1044 | case TIOCMSET: |
| 1045 | CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); |
| 1046 | SET(sc->sc_mcr, combits); |
| 1047 | break; |
| 1048 | } |
| 1049 | u_char mcr = sc->sc_mcr; |
| 1050 | mutex_exit(&sc->sc_lock); |
| 1051 | |
| 1052 | if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) |
| 1053 | ucom_dtr(sc, (mcr & UMCR_DTR) != 0); |
| 1054 | if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) |
| 1055 | ucom_rts(sc, (mcr & UMCR_RTS) != 0); |
| 1056 | } |
| 1057 | |
| 1058 | static int |
| 1059 | ucom_to_tiocm(struct ucom_softc *sc) |
| 1060 | { |
| 1061 | u_char combits; |
| 1062 | int ttybits = 0; |
| 1063 | |
| 1064 | mutex_enter(&sc->sc_lock); |
| 1065 | combits = sc->sc_mcr; |
| 1066 | if (ISSET(combits, UMCR_DTR)) |
| 1067 | SET(ttybits, TIOCM_DTR); |
| 1068 | if (ISSET(combits, UMCR_RTS)) |
| 1069 | SET(ttybits, TIOCM_RTS); |
| 1070 | |
| 1071 | combits = sc->sc_msr; |
| 1072 | if (ISSET(combits, UMSR_DCD)) |
| 1073 | SET(ttybits, TIOCM_CD); |
| 1074 | if (ISSET(combits, UMSR_CTS)) |
| 1075 | SET(ttybits, TIOCM_CTS); |
| 1076 | if (ISSET(combits, UMSR_DSR)) |
| 1077 | SET(ttybits, TIOCM_DSR); |
| 1078 | if (ISSET(combits, UMSR_RI | UMSR_TERI)) |
| 1079 | SET(ttybits, TIOCM_RI); |
| 1080 | |
| 1081 | #if 0 |
| 1082 | XXX; |
| 1083 | if (sc->sc_ier != 0) |
| 1084 | SET(ttybits, TIOCM_LE); |
| 1085 | #endif |
| 1086 | mutex_exit(&sc->sc_lock); |
| 1087 | |
| 1088 | return ttybits; |
| 1089 | } |
| 1090 | |
| 1091 | static void |
| 1092 | ucom_break(struct ucom_softc *sc, int onoff) |
| 1093 | { |
| 1094 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1095 | |
| 1096 | DPRINTF("onoff=%d" , onoff, 0, 0, 0); |
| 1097 | |
| 1098 | if (sc->sc_methods->ucom_set != NULL) |
| 1099 | sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, |
| 1100 | UCOM_SET_BREAK, onoff); |
| 1101 | } |
| 1102 | |
| 1103 | static void |
| 1104 | ucom_dtr(struct ucom_softc *sc, int onoff) |
| 1105 | { |
| 1106 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1107 | |
| 1108 | DPRINTF("onoff=%d" , onoff, 0, 0, 0); |
| 1109 | |
| 1110 | if (sc->sc_methods->ucom_set != NULL) |
| 1111 | sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, |
| 1112 | UCOM_SET_DTR, onoff); |
| 1113 | } |
| 1114 | |
| 1115 | static void |
| 1116 | ucom_rts(struct ucom_softc *sc, int onoff) |
| 1117 | { |
| 1118 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1119 | |
| 1120 | DPRINTF("onoff=%d" , onoff, 0, 0, 0); |
| 1121 | |
| 1122 | if (sc->sc_methods->ucom_set != NULL) |
| 1123 | sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, |
| 1124 | UCOM_SET_RTS, onoff); |
| 1125 | } |
| 1126 | |
| 1127 | void |
| 1128 | ucom_status_change(struct ucom_softc *sc) |
| 1129 | { |
| 1130 | struct tty *tp = sc->sc_tty; |
| 1131 | |
| 1132 | if (sc->sc_methods->ucom_get_status != NULL) { |
| 1133 | u_char msr, lsr; |
| 1134 | |
| 1135 | sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, |
| 1136 | &lsr, &msr); |
| 1137 | mutex_enter(&sc->sc_lock); |
| 1138 | u_char old_msr = sc->sc_msr; |
| 1139 | |
| 1140 | sc->sc_lsr = lsr; |
| 1141 | sc->sc_msr = msr; |
| 1142 | mutex_exit(&sc->sc_lock); |
| 1143 | |
| 1144 | if (ISSET((msr ^ old_msr), UMSR_DCD)) { |
| 1145 | mutex_spin_enter(&timecounter_lock); |
| 1146 | pps_capture(&sc->sc_pps_state); |
| 1147 | pps_event(&sc->sc_pps_state, |
| 1148 | (sc->sc_msr & UMSR_DCD) ? |
| 1149 | PPS_CAPTUREASSERT : |
| 1150 | PPS_CAPTURECLEAR); |
| 1151 | mutex_spin_exit(&timecounter_lock); |
| 1152 | |
| 1153 | (*tp->t_linesw->l_modem)(tp, ISSET(msr, UMSR_DCD)); |
| 1154 | } |
| 1155 | } else { |
| 1156 | mutex_enter(&sc->sc_lock); |
| 1157 | sc->sc_lsr = 0; |
| 1158 | /* Assume DCD is present, if we have no chance to check it. */ |
| 1159 | sc->sc_msr = UMSR_DCD; |
| 1160 | mutex_exit(&sc->sc_lock); |
| 1161 | } |
| 1162 | } |
| 1163 | |
| 1164 | static int |
| 1165 | ucomparam(struct tty *tp, struct termios *t) |
| 1166 | { |
| 1167 | const int unit = UCOMUNIT(tp->t_dev); |
| 1168 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 1169 | int error = 0; |
| 1170 | |
| 1171 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1172 | |
| 1173 | if (sc == NULL) |
| 1174 | return EIO; |
| 1175 | |
| 1176 | mutex_enter(&sc->sc_lock); |
| 1177 | if (sc->sc_dying) { |
| 1178 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 1179 | mutex_exit(&sc->sc_lock); |
| 1180 | return EIO; |
| 1181 | } |
| 1182 | |
| 1183 | sc->sc_refcnt++; |
| 1184 | mutex_exit(&sc->sc_lock); |
| 1185 | |
| 1186 | /* Check requested parameters. */ |
| 1187 | if (t->c_ispeed && t->c_ispeed != t->c_ospeed) { |
| 1188 | error = EINVAL; |
| 1189 | goto out; |
| 1190 | } |
| 1191 | |
| 1192 | /* |
| 1193 | * For the console, always force CLOCAL and !HUPCL, so that the port |
| 1194 | * is always active. |
| 1195 | */ |
| 1196 | if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { |
| 1197 | SET(t->c_cflag, CLOCAL); |
| 1198 | CLR(t->c_cflag, HUPCL); |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * If there were no changes, don't do anything. This avoids dropping |
| 1203 | * input and improves performance when all we did was frob things like |
| 1204 | * VMIN and VTIME. |
| 1205 | */ |
| 1206 | if (tp->t_ospeed == t->c_ospeed && |
| 1207 | tp->t_cflag == t->c_cflag) { |
| 1208 | goto out; |
| 1209 | } |
| 1210 | |
| 1211 | /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ |
| 1212 | |
| 1213 | /* And copy to tty. */ |
| 1214 | tp->t_ispeed = 0; |
| 1215 | tp->t_ospeed = t->c_ospeed; |
| 1216 | tp->t_cflag = t->c_cflag; |
| 1217 | |
| 1218 | if (sc->sc_methods->ucom_param != NULL) { |
| 1219 | error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, |
| 1220 | t); |
| 1221 | if (error) |
| 1222 | goto out; |
| 1223 | } |
| 1224 | |
| 1225 | /* XXX worry about CHWFLOW */ |
| 1226 | |
| 1227 | /* |
| 1228 | * Update the tty layer's idea of the carrier bit, in case we changed |
| 1229 | * CLOCAL or MDMBUF. We don't hang up here; we only do that by |
| 1230 | * explicit request. |
| 1231 | */ |
| 1232 | DPRINTF("l_modem" , 0, 0, 0, 0); |
| 1233 | (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); |
| 1234 | |
| 1235 | #if 0 |
| 1236 | XXX what if the hardware is not open |
| 1237 | if (!ISSET(t->c_cflag, CHWFLOW)) { |
| 1238 | if (sc->sc_tx_stopped) { |
| 1239 | sc->sc_tx_stopped = 0; |
| 1240 | ucomstart(tp); |
| 1241 | } |
| 1242 | } |
| 1243 | #endif |
| 1244 | out: |
| 1245 | mutex_enter(&sc->sc_lock); |
| 1246 | if (--sc->sc_refcnt < 0) |
| 1247 | cv_broadcast(&sc->sc_detachcv); |
| 1248 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(tp->t_dev), sc->sc_refcnt, 0, 0); |
| 1249 | |
| 1250 | mutex_exit(&sc->sc_lock); |
| 1251 | |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | static int |
| 1256 | ucomhwiflow(struct tty *tp, int block) |
| 1257 | { |
| 1258 | const int unit = UCOMUNIT(tp->t_dev); |
| 1259 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 1260 | int old; |
| 1261 | |
| 1262 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1263 | |
| 1264 | if (sc == NULL) |
| 1265 | return 0; |
| 1266 | |
| 1267 | mutex_enter(&sc->sc_lock); |
| 1268 | old = sc->sc_rx_stopped; |
| 1269 | sc->sc_rx_stopped = (u_char)block; |
| 1270 | |
| 1271 | if (old && !block) { |
| 1272 | sc->sc_rx_unblock = 1; |
| 1273 | softint_schedule(sc->sc_si); |
| 1274 | } |
| 1275 | mutex_exit(&sc->sc_lock); |
| 1276 | |
| 1277 | return 1; |
| 1278 | } |
| 1279 | |
| 1280 | static void |
| 1281 | ucomstart(struct tty *tp) |
| 1282 | { |
| 1283 | const int unit = UCOMUNIT(tp->t_dev); |
| 1284 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 1285 | struct ucom_buffer *ub; |
| 1286 | u_char *data; |
| 1287 | int cnt; |
| 1288 | |
| 1289 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1290 | |
| 1291 | if (sc == NULL) |
| 1292 | return; |
| 1293 | |
| 1294 | KASSERT(&sc->sc_lock); |
| 1295 | KASSERT(mutex_owned(&tty_lock)); |
| 1296 | if (sc->sc_dying) { |
| 1297 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 1298 | return; |
| 1299 | } |
| 1300 | |
| 1301 | if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) |
| 1302 | goto out; |
| 1303 | if (sc->sc_tx_stopped) |
| 1304 | goto out; |
| 1305 | |
| 1306 | if (!ttypull(tp)) |
| 1307 | goto out; |
| 1308 | |
| 1309 | /* Grab the first contiguous region of buffer space. */ |
| 1310 | data = tp->t_outq.c_cf; |
| 1311 | cnt = ndqb(&tp->t_outq, 0); |
| 1312 | |
| 1313 | if (cnt == 0) |
| 1314 | goto out; |
| 1315 | |
| 1316 | ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); |
| 1317 | if (ub == NULL) { |
| 1318 | SET(tp->t_state, TS_BUSY); |
| 1319 | goto out; |
| 1320 | } |
| 1321 | |
| 1322 | SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); |
| 1323 | |
| 1324 | if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) |
| 1325 | SET(tp->t_state, TS_BUSY); |
| 1326 | |
| 1327 | if (cnt > sc->sc_obufsize) |
| 1328 | cnt = sc->sc_obufsize; |
| 1329 | |
| 1330 | if (sc->sc_methods->ucom_write != NULL) |
| 1331 | sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, |
| 1332 | ub->ub_data, data, &cnt); |
| 1333 | else |
| 1334 | memcpy(ub->ub_data, data, cnt); |
| 1335 | |
| 1336 | ub->ub_len = cnt; |
| 1337 | ub->ub_index = 0; |
| 1338 | |
| 1339 | SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); |
| 1340 | |
| 1341 | softint_schedule(sc->sc_si); |
| 1342 | |
| 1343 | out: |
| 1344 | DPRINTF("... done" , 0, 0, 0, 0); |
| 1345 | return; |
| 1346 | } |
| 1347 | |
| 1348 | void |
| 1349 | ucomstop(struct tty *tp, int flag) |
| 1350 | { |
| 1351 | #if 0 |
| 1352 | const int unit = UCOMUNIT(tp->t_dev); |
| 1353 | struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); |
| 1354 | |
| 1355 | mutex_enter(&sc->sc_lock); |
| 1356 | mutex_spin_enter(&tty_lock); |
| 1357 | if (ISSET(tp->t_state, TS_BUSY)) { |
| 1358 | /* obuff_full -> obuff_free? */ |
| 1359 | /* sc->sc_tx_stopped = 1; */ |
| 1360 | if (!ISSET(tp->t_state, TS_TTSTOP)) |
| 1361 | SET(tp->t_state, TS_FLUSH); |
| 1362 | } |
| 1363 | mutex_spin_exit(&tty_lock); |
| 1364 | mutex_exit(&sc->sc_lock); |
| 1365 | #endif |
| 1366 | } |
| 1367 | |
| 1368 | static void |
| 1369 | ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, |
| 1370 | usbd_status err) |
| 1371 | { |
| 1372 | struct tty *tp = sc->sc_tty; |
| 1373 | uint32_t cc = ub->ub_len; |
| 1374 | |
| 1375 | KASSERT(mutex_owned(&sc->sc_lock)); |
| 1376 | |
| 1377 | switch (err) { |
| 1378 | case USBD_IN_PROGRESS: |
| 1379 | ub->ub_index = ub->ub_len; |
| 1380 | break; |
| 1381 | case USBD_STALLED: |
| 1382 | ub->ub_index = 0; |
| 1383 | softint_schedule(sc->sc_si); |
| 1384 | break; |
| 1385 | case USBD_NORMAL_COMPLETION: |
| 1386 | usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); |
| 1387 | rnd_add_uint32(&sc->sc_rndsource, cc); |
| 1388 | /*FALLTHROUGH*/ |
| 1389 | default: |
| 1390 | SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); |
| 1391 | SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); |
| 1392 | cc -= sc->sc_opkthdrlen; |
| 1393 | |
| 1394 | mutex_spin_enter(&tty_lock); |
| 1395 | CLR(tp->t_state, TS_BUSY); |
| 1396 | if (ISSET(tp->t_state, TS_FLUSH)) |
| 1397 | CLR(tp->t_state, TS_FLUSH); |
| 1398 | else |
| 1399 | ndflush(&tp->t_outq, cc); |
| 1400 | mutex_spin_exit(&tty_lock); |
| 1401 | |
| 1402 | if (err != USBD_CANCELLED && err != USBD_IOERROR && |
| 1403 | !sc->sc_dying) { |
| 1404 | if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) |
| 1405 | ucom_submit_write(sc, ub); |
| 1406 | |
| 1407 | mutex_spin_enter(&tty_lock); |
| 1408 | (*tp->t_linesw->l_start)(tp); |
| 1409 | mutex_spin_exit(&tty_lock); |
| 1410 | } |
| 1411 | break; |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | static void |
| 1416 | ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) |
| 1417 | { |
| 1418 | |
| 1419 | KASSERT(mutex_owned(&sc->sc_lock)); |
| 1420 | |
| 1421 | usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, ub->ub_len, |
| 1422 | 0, USBD_NO_TIMEOUT, ucomwritecb); |
| 1423 | |
| 1424 | ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); |
| 1425 | } |
| 1426 | |
| 1427 | static void |
| 1428 | ucomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status) |
| 1429 | { |
| 1430 | struct ucom_softc *sc = (struct ucom_softc *)p; |
| 1431 | |
| 1432 | mutex_enter(&sc->sc_lock); |
| 1433 | ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); |
| 1434 | mutex_exit(&sc->sc_lock); |
| 1435 | |
| 1436 | } |
| 1437 | |
| 1438 | static void |
| 1439 | ucom_softintr(void *arg) |
| 1440 | { |
| 1441 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1442 | |
| 1443 | struct ucom_softc *sc = arg; |
| 1444 | |
| 1445 | mutex_enter(&sc->sc_lock); |
| 1446 | if (sc->sc_dying) { |
| 1447 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 1448 | mutex_exit(&sc->sc_lock); |
| 1449 | return; |
| 1450 | } |
| 1451 | |
| 1452 | struct tty *tp = sc->sc_tty; |
| 1453 | mutex_enter(&tty_lock); |
| 1454 | if (!ISSET(tp->t_state, TS_ISOPEN)) { |
| 1455 | mutex_exit(&tty_lock); |
| 1456 | mutex_exit(&sc->sc_lock); |
| 1457 | return; |
| 1458 | } |
| 1459 | mutex_exit(&tty_lock); |
| 1460 | |
| 1461 | struct ucom_buffer *ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); |
| 1462 | |
| 1463 | if (ub != NULL && ub->ub_index == 0) |
| 1464 | ucom_submit_write(sc, ub); |
| 1465 | |
| 1466 | if (sc->sc_rx_unblock) |
| 1467 | ucom_read_complete(sc); |
| 1468 | |
| 1469 | mutex_exit(&sc->sc_lock); |
| 1470 | } |
| 1471 | |
| 1472 | static void |
| 1473 | ucom_read_complete(struct ucom_softc *sc) |
| 1474 | { |
| 1475 | int (*rint)(int, struct tty *); |
| 1476 | struct ucom_buffer *ub; |
| 1477 | struct tty *tp; |
| 1478 | |
| 1479 | KASSERT(mutex_owned(&sc->sc_lock)); |
| 1480 | |
| 1481 | tp = sc->sc_tty; |
| 1482 | rint = tp->t_linesw->l_rint; |
| 1483 | ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); |
| 1484 | |
| 1485 | while (ub != NULL && !sc->sc_rx_stopped) { |
| 1486 | |
| 1487 | /* XXX ttyinput takes tty_lock */ |
| 1488 | while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { |
| 1489 | /* Give characters to tty layer. */ |
| 1490 | if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { |
| 1491 | /* Overflow: drop remainder */ |
| 1492 | ub->ub_index = ub->ub_len; |
| 1493 | } else |
| 1494 | ub->ub_index++; |
| 1495 | } |
| 1496 | |
| 1497 | if (ub->ub_index == ub->ub_len) { |
| 1498 | SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); |
| 1499 | |
| 1500 | sc->sc_refcnt--; |
| 1501 | /* increments sc_refcnt */ |
| 1502 | ucomsubmitread(sc, ub); |
| 1503 | |
| 1504 | ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); |
| 1505 | } |
| 1506 | } |
| 1507 | |
| 1508 | sc->sc_rx_unblock = (ub != NULL); |
| 1509 | } |
| 1510 | |
| 1511 | static int |
| 1512 | ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) |
| 1513 | { |
| 1514 | usbd_status err; |
| 1515 | |
| 1516 | KASSERT(mutex_owned(&sc->sc_lock)); |
| 1517 | |
| 1518 | usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, sc->sc_ibufsize, |
| 1519 | USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ucomreadcb); |
| 1520 | |
| 1521 | if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { |
| 1522 | /* XXX: Recover from this, please! */ |
| 1523 | printf("%s: err=%s\n" , __func__, usbd_errstr(err)); |
| 1524 | return EIO; |
| 1525 | } |
| 1526 | |
| 1527 | sc->sc_refcnt++; |
| 1528 | |
| 1529 | SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); |
| 1530 | |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
| 1534 | static void |
| 1535 | ucomreadcb(struct usbd_xfer *xfer, void *p, usbd_status status) |
| 1536 | { |
| 1537 | struct ucom_softc *sc = (struct ucom_softc *)p; |
| 1538 | struct ucom_buffer *ub; |
| 1539 | uint32_t cc; |
| 1540 | u_char *cp; |
| 1541 | |
| 1542 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1543 | |
| 1544 | mutex_enter(&sc->sc_lock); |
| 1545 | |
| 1546 | struct tty *tp = sc->sc_tty; |
| 1547 | |
| 1548 | if (status == USBD_CANCELLED || status == USBD_IOERROR || |
| 1549 | sc->sc_dying) { |
| 1550 | |
| 1551 | DPRINTF("... done (status %d dying %d)" , status, sc->sc_dying, |
| 1552 | 0, 0); |
| 1553 | |
| 1554 | if (status == USBD_IOERROR || sc->sc_dying) { |
| 1555 | /* Send something to wake upper layer */ |
| 1556 | (tp->t_linesw->l_rint)('\n', tp); |
| 1557 | mutex_spin_enter(&tty_lock); /* XXX */ |
| 1558 | ttwakeup(tp); |
| 1559 | mutex_spin_exit(&tty_lock); /* XXX */ |
| 1560 | } |
| 1561 | |
| 1562 | if (--sc->sc_refcnt < 0) |
| 1563 | cv_broadcast(&sc->sc_detachcv); |
| 1564 | DPRINTF("unit=%d refcnt %d" , UCOMUNIT(tp->t_dev), sc->sc_refcnt, |
| 1565 | 0, 0); |
| 1566 | mutex_exit(&sc->sc_lock); |
| 1567 | |
| 1568 | return; |
| 1569 | } |
| 1570 | |
| 1571 | ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); |
| 1572 | SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); |
| 1573 | |
| 1574 | if (status != USBD_NORMAL_COMPLETION) { |
| 1575 | if (status == USBD_STALLED) { |
| 1576 | usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); |
| 1577 | } else { |
| 1578 | printf("ucomreadcb: wonky status=%s\n" , |
| 1579 | usbd_errstr(status)); |
| 1580 | } |
| 1581 | |
| 1582 | DPRINTF("... done (status %d)" , status, 0, 0, 0); |
| 1583 | sc->sc_refcnt--; |
| 1584 | /* re-adds ub to sc_ibuff_empty and increments sc_refcnt */ |
| 1585 | ucomsubmitread(sc, ub); |
| 1586 | mutex_exit(&sc->sc_lock); |
| 1587 | return; |
| 1588 | } |
| 1589 | |
| 1590 | usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); |
| 1591 | |
| 1592 | #ifdef UCOM_DEBUG |
| 1593 | /* This is triggered by uslsa(4) occasionally. */ |
| 1594 | if ((ucomdebug > 0) && (cc == 0)) { |
| 1595 | device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n" ); |
| 1596 | } |
| 1597 | #endif |
| 1598 | KDASSERT(cp == ub->ub_data); |
| 1599 | |
| 1600 | rnd_add_uint32(&sc->sc_rndsource, cc); |
| 1601 | |
| 1602 | if (sc->sc_state != UCOM_OPEN) { |
| 1603 | /* Go around again - we're not quite ready */ |
| 1604 | sc->sc_refcnt--; |
| 1605 | /* re-adds ub to sc_ibuff_empty and increments sc_refcnt */ |
| 1606 | ucomsubmitread(sc, ub); |
| 1607 | mutex_exit(&sc->sc_lock); |
| 1608 | DPRINTF("... done (not open)" , 0, 0, 0, 0); |
| 1609 | return; |
| 1610 | } |
| 1611 | |
| 1612 | if (sc->sc_methods->ucom_read != NULL) { |
| 1613 | sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, |
| 1614 | &cp, &cc); |
| 1615 | ub->ub_index = (u_int)(cp - ub->ub_data); |
| 1616 | } else |
| 1617 | ub->ub_index = 0; |
| 1618 | |
| 1619 | ub->ub_len = cc; |
| 1620 | |
| 1621 | SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); |
| 1622 | |
| 1623 | ucom_read_complete(sc); |
| 1624 | mutex_exit(&sc->sc_lock); |
| 1625 | |
| 1626 | DPRINTF("... done" , 0, 0, 0, 0); |
| 1627 | } |
| 1628 | |
| 1629 | static void |
| 1630 | ucom_cleanup(struct ucom_softc *sc) |
| 1631 | { |
| 1632 | |
| 1633 | UCOMHIST_FUNC(); UCOMHIST_CALLED(); |
| 1634 | |
| 1635 | DPRINTF("aborting pipes" , 0, 0, 0, 0); |
| 1636 | |
| 1637 | mutex_enter(&sc->sc_lock); |
| 1638 | |
| 1639 | /* If we're dying then the detach routine will abort our pipes, etc */ |
| 1640 | if (sc->sc_dying) { |
| 1641 | DPRINTF("... dying" , 0, 0, 0, 0); |
| 1642 | |
| 1643 | mutex_exit(&sc->sc_lock); |
| 1644 | return; |
| 1645 | } |
| 1646 | |
| 1647 | ucom_shutdown(sc); |
| 1648 | |
| 1649 | mutex_exit(&sc->sc_lock); |
| 1650 | |
| 1651 | if (sc->sc_bulkin_pipe != NULL) { |
| 1652 | usbd_abort_pipe(sc->sc_bulkin_pipe); |
| 1653 | } |
| 1654 | if (sc->sc_bulkout_pipe != NULL) { |
| 1655 | usbd_abort_pipe(sc->sc_bulkout_pipe); |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | #endif /* NUCOM > 0 */ |
| 1660 | |
| 1661 | int |
| 1662 | ucomprint(void *aux, const char *pnp) |
| 1663 | { |
| 1664 | struct ucom_attach_args *ucaa = aux; |
| 1665 | |
| 1666 | if (pnp) |
| 1667 | aprint_normal("ucom at %s" , pnp); |
| 1668 | if (ucaa->ucaa_portno != UCOM_UNK_PORTNO) |
| 1669 | aprint_normal(" portno %d" , ucaa->ucaa_portno); |
| 1670 | return UNCONF; |
| 1671 | } |
| 1672 | |
| 1673 | int |
| 1674 | ucomsubmatch(device_t parent, cfdata_t cf, |
| 1675 | const int *ldesc, void *aux) |
| 1676 | { |
| 1677 | struct ucom_attach_args *ucaa = aux; |
| 1678 | |
| 1679 | if (ucaa->ucaa_portno != UCOM_UNK_PORTNO && |
| 1680 | cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && |
| 1681 | cf->cf_loc[UCOMBUSCF_PORTNO] != ucaa->ucaa_portno) |
| 1682 | return 0; |
| 1683 | return config_match(parent, cf, aux); |
| 1684 | } |
| 1685 | |