1 /*- 2 * Copyright (c) 2005-2006 Mitsuru IWASAKI <iwasaki@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include "opt_acpi.h" 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 35 #include <contrib/dev/acpica/include/acpi.h> 36 #include <contrib/dev/acpica/include/accommon.h> 37 38 #include <dev/acpica/acpivar.h> 39 #include <dev/acpica/acpiio.h> 40 41 /* Hooks for the ACPI CA debugging infrastructure */ 42 #define _COMPONENT ACPI_DOCK 43 ACPI_MODULE_NAME("DOCK") 44 45 /* For Docking status */ 46 #define ACPI_DOCK_STATUS_UNKNOWN -1 47 #define ACPI_DOCK_STATUS_UNDOCKED 0 48 #define ACPI_DOCK_STATUS_DOCKED 1 49 50 #define ACPI_DOCK_UNLOCK 0 /* Allow device to be ejected */ 51 #define ACPI_DOCK_LOCK 1 /* Prevent dev from being removed */ 52 53 #define ACPI_DOCK_ISOLATE 0 /* Isolate from dock connector */ 54 #define ACPI_DOCK_CONNECT 1 /* Connect to dock */ 55 56 struct acpi_dock_softc { 57 int _sta; 58 int _bdn; 59 int _uid; 60 int status; 61 struct sysctl_ctx_list *sysctl_ctx; 62 struct sysctl_oid *sysctl_tree; 63 }; 64 65 ACPI_SERIAL_DECL(dock, "ACPI Docking Station"); 66 67 static char *acpi_dock_pnp_ids[] = {"PNP0C15", NULL}; 68 69 /* 70 * Utility functions 71 */ 72 73 static void 74 acpi_dock_get_info(device_t dev) 75 { 76 struct acpi_dock_softc *sc; 77 ACPI_HANDLE h; 78 79 sc = device_get_softc(dev); 80 h = acpi_get_handle(dev); 81 82 if (ACPI_FAILURE(acpi_GetInteger(h, "_STA", &sc->_sta))) 83 sc->_sta = ACPI_DOCK_STATUS_UNKNOWN; 84 if (ACPI_FAILURE(acpi_GetInteger(h, "_BDN", &sc->_bdn))) 85 sc->_bdn = ACPI_DOCK_STATUS_UNKNOWN; 86 if (ACPI_FAILURE(acpi_GetInteger(h, "_UID", &sc->_uid))) 87 sc->_uid = ACPI_DOCK_STATUS_UNKNOWN; 88 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 89 "_STA: %04x, _BDN: %04x, _UID: %04x\n", sc->_sta, 90 sc->_bdn, sc->_uid); 91 } 92 93 static int 94 acpi_dock_execute_dck(device_t dev, int dock) 95 { 96 ACPI_HANDLE h; 97 ACPI_OBJECT argobj; 98 ACPI_OBJECT_LIST args; 99 ACPI_BUFFER buf; 100 ACPI_OBJECT retobj; 101 ACPI_STATUS status; 102 103 h = acpi_get_handle(dev); 104 105 argobj.Type = ACPI_TYPE_INTEGER; 106 argobj.Integer.Value = dock; 107 args.Count = 1; 108 args.Pointer = &argobj; 109 buf.Pointer = &retobj; 110 buf.Length = sizeof(retobj); 111 status = AcpiEvaluateObject(h, "_DCK", &args, &buf); 112 113 /* 114 * When _DCK is called with 0, OSPM will ignore the return value. 115 */ 116 if (dock == ACPI_DOCK_ISOLATE) 117 return (0); 118 119 /* If _DCK returned 1, the request succeeded. */ 120 if (ACPI_SUCCESS(status) && retobj.Type == ACPI_TYPE_INTEGER && 121 retobj.Integer.Value == 1) 122 return (0); 123 124 return (-1); 125 } 126 127 /* Lock devices while docked to prevent surprise removal. */ 128 static void 129 acpi_dock_execute_lck(device_t dev, int lock) 130 { 131 ACPI_HANDLE h; 132 133 h = acpi_get_handle(dev); 134 acpi_SetInteger(h, "_LCK", lock); 135 } 136 137 /* Eject a device (i.e., motorized). */ 138 static int 139 acpi_dock_execute_ejx(device_t dev, int eject, int state) 140 { 141 ACPI_HANDLE h; 142 ACPI_STATUS status; 143 char ejx[5]; 144 145 h = acpi_get_handle(dev); 146 snprintf(ejx, sizeof(ejx), "_EJ%d", state); 147 status = acpi_SetInteger(h, ejx, eject); 148 if (ACPI_SUCCESS(status)) 149 return (0); 150 151 return (-1); 152 } 153 154 /* Find dependent devices. When their parent is removed, so are they. */ 155 static int 156 acpi_dock_is_ejd_device(ACPI_HANDLE dock_handle, ACPI_HANDLE handle) 157 { 158 int ret; 159 ACPI_STATUS ret_status; 160 ACPI_BUFFER ejd_buffer; 161 ACPI_OBJECT *obj; 162 163 ret = 0; 164 165 ejd_buffer.Pointer = NULL; 166 ejd_buffer.Length = ACPI_ALLOCATE_BUFFER; 167 ret_status = AcpiEvaluateObject(handle, "_EJD", NULL, &ejd_buffer); 168 if (ACPI_FAILURE(ret_status)) 169 goto out; 170 171 obj = (ACPI_OBJECT *)ejd_buffer.Pointer; 172 if (dock_handle == acpi_GetReference(NULL, obj)) 173 ret = 1; 174 175 out: 176 if (ejd_buffer.Pointer != NULL) 177 AcpiOsFree(ejd_buffer.Pointer); 178 179 return (ret); 180 } 181 182 /* 183 * Docking functions 184 */ 185 186 static void 187 acpi_dock_attach_later(void *context) 188 { 189 device_t dev; 190 191 dev = (device_t)context; 192 193 if (!device_is_enabled(dev)) 194 device_enable(dev); 195 196 bus_topo_lock(); 197 device_probe_and_attach(dev); 198 bus_topo_unlock(); 199 } 200 201 static ACPI_STATUS 202 acpi_dock_insert_child(ACPI_HANDLE handle, UINT32 level, void *context, 203 void **status) 204 { 205 device_t dock_dev, dev; 206 ACPI_HANDLE dock_handle; 207 208 dock_dev = (device_t)context; 209 dock_handle = acpi_get_handle(dock_dev); 210 211 if (!acpi_dock_is_ejd_device(dock_handle, handle)) 212 goto out; 213 214 ACPI_VPRINT(dock_dev, acpi_device_get_parent_softc(dock_dev), 215 "inserting device for %s\n", acpi_name(handle)); 216 217 #if 0 218 /* 219 * If the system boot up w/o Docking, the devices under the dock 220 * still un-initialized, also control methods such as _INI, _STA 221 * are not executed. 222 * Normal devices are initialized at booting by calling 223 * AcpiInitializeObjects(), however the devices under the dock 224 * need to be initialized here on the scheme of ACPICA. 225 */ 226 ACPI_INIT_WALK_INFO Info; 227 228 AcpiNsWalkNamespace(ACPI_TYPE_ANY, handle, 229 100, TRUE, AcpiNsInitOneDevice, NULL, &Info, NULL); 230 #endif 231 232 dev = acpi_get_device(handle); 233 if (dev == NULL) { 234 device_printf(dock_dev, "error: %s has no associated device\n", 235 acpi_name(handle)); 236 goto out; 237 } 238 239 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_dock_attach_later, dev); 240 241 out: 242 return (AE_OK); 243 } 244 245 static void 246 acpi_dock_insert_children(device_t dev) 247 { 248 ACPI_STATUS status; 249 ACPI_HANDLE sb_handle; 250 251 status = AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle); 252 if (ACPI_SUCCESS(status)) { 253 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 254 100, acpi_dock_insert_child, NULL, dev, NULL); 255 } 256 } 257 258 static void 259 acpi_dock_insert(device_t dev) 260 { 261 struct acpi_dock_softc *sc; 262 ACPI_HANDLE h; 263 264 ACPI_SERIAL_ASSERT(dock); 265 266 sc = device_get_softc(dev); 267 h = acpi_get_handle(dev); 268 269 if (sc->status == ACPI_DOCK_STATUS_UNDOCKED || 270 sc->status == ACPI_DOCK_STATUS_UNKNOWN) { 271 acpi_dock_execute_lck(dev, ACPI_DOCK_LOCK); 272 if (acpi_dock_execute_dck(dev, ACPI_DOCK_CONNECT) != 0) { 273 device_printf(dev, "_DCK failed\n"); 274 return; 275 } 276 277 if (!cold) { 278 acpi_dock_insert_children(dev); 279 280 acpi_UserNotify("Dock", h, 1); 281 } 282 283 sc->status = ACPI_DOCK_STATUS_DOCKED; 284 } 285 } 286 287 /* 288 * Undock 289 */ 290 291 static ACPI_STATUS 292 acpi_dock_eject_child(ACPI_HANDLE handle, UINT32 level, void *context, 293 void **status) 294 { 295 device_t dock_dev, dev; 296 ACPI_HANDLE dock_handle; 297 298 dock_dev = *(device_t *)context; 299 dock_handle = acpi_get_handle(dock_dev); 300 301 if (!acpi_dock_is_ejd_device(dock_handle, handle)) 302 goto out; 303 304 ACPI_VPRINT(dock_dev, acpi_device_get_parent_softc(dock_dev), 305 "ejecting device for %s\n", acpi_name(handle)); 306 307 dev = acpi_get_device(handle); 308 if (dev != NULL && device_is_attached(dev)) { 309 bus_topo_lock(); 310 device_detach(dev); 311 bus_topo_unlock(); 312 } 313 314 acpi_SetInteger(handle, "_EJ0", 0); 315 out: 316 return (AE_OK); 317 } 318 319 static void 320 acpi_dock_eject_children(device_t dev) 321 { 322 ACPI_HANDLE sb_handle; 323 ACPI_STATUS status; 324 325 status = AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle); 326 if (ACPI_SUCCESS(status)) { 327 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 328 100, acpi_dock_eject_child, NULL, &dev, NULL); 329 } 330 } 331 332 static void 333 acpi_dock_removal(device_t dev) 334 { 335 struct acpi_dock_softc *sc; 336 ACPI_HANDLE h; 337 338 ACPI_SERIAL_ASSERT(dock); 339 340 sc = device_get_softc(dev); 341 h = acpi_get_handle(dev); 342 343 if (sc->status == ACPI_DOCK_STATUS_DOCKED || 344 sc->status == ACPI_DOCK_STATUS_UNKNOWN) { 345 acpi_dock_eject_children(dev); 346 if (acpi_dock_execute_dck(dev, ACPI_DOCK_ISOLATE) != 0) 347 return; 348 349 acpi_dock_execute_lck(dev, ACPI_DOCK_UNLOCK); 350 351 if (acpi_dock_execute_ejx(dev, 1, 0) != 0) { 352 device_printf(dev, "_EJ0 failed\n"); 353 return; 354 } 355 356 acpi_UserNotify("Dock", h, 0); 357 358 sc->status = ACPI_DOCK_STATUS_UNDOCKED; 359 } 360 361 acpi_dock_get_info(dev); 362 if (sc->_sta != 0) 363 device_printf(dev, "mechanical failure (%#x).\n", sc->_sta); 364 } 365 366 /* 367 * Device/Bus check 368 */ 369 370 static void 371 acpi_dock_device_check(device_t dev) 372 { 373 struct acpi_dock_softc *sc; 374 375 ACPI_SERIAL_ASSERT(dock); 376 377 sc = device_get_softc(dev); 378 acpi_dock_get_info(dev); 379 380 /* 381 * If the _STA method indicates 'present' and 'functioning', the 382 * system is docked. If _STA does not exist for this device, it 383 * is always present. 384 */ 385 if (sc->_sta == ACPI_DOCK_STATUS_UNKNOWN || 386 ACPI_DEVICE_PRESENT(sc->_sta)) 387 acpi_dock_insert(dev); 388 else if (sc->_sta == 0) 389 acpi_dock_removal(dev); 390 } 391 392 /* 393 * Notify Handler 394 */ 395 396 static void 397 acpi_dock_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 398 { 399 device_t dev; 400 401 dev = (device_t) context; 402 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 403 "got notification %#x\n", notify); 404 405 ACPI_SERIAL_BEGIN(dock); 406 switch (notify) { 407 case ACPI_NOTIFY_BUS_CHECK: 408 case ACPI_NOTIFY_DEVICE_CHECK: 409 acpi_dock_device_check(dev); 410 break; 411 case ACPI_NOTIFY_EJECT_REQUEST: 412 acpi_dock_removal(dev); 413 break; 414 default: 415 device_printf(dev, "unknown notify %#x\n", notify); 416 break; 417 } 418 ACPI_SERIAL_END(dock); 419 } 420 421 static int 422 acpi_dock_status_sysctl(SYSCTL_HANDLER_ARGS) 423 { 424 struct acpi_dock_softc *sc; 425 device_t dev; 426 int status, err; 427 428 dev = (device_t)arg1; 429 430 sc = device_get_softc(dev); 431 status = sc->status; 432 433 ACPI_SERIAL_BEGIN(dock); 434 err = sysctl_handle_int(oidp, &status, 0, req); 435 if (err != 0 || req->newptr == NULL) 436 goto out; 437 438 if (status != ACPI_DOCK_STATUS_UNDOCKED && 439 status != ACPI_DOCK_STATUS_DOCKED) { 440 err = EINVAL; 441 goto out; 442 } 443 444 if (status == sc->status) 445 goto out; 446 447 switch (status) { 448 case ACPI_DOCK_STATUS_UNDOCKED: 449 acpi_dock_removal(dev); 450 break; 451 case ACPI_DOCK_STATUS_DOCKED: 452 acpi_dock_device_check(dev); 453 break; 454 default: 455 err = EINVAL; 456 break; 457 } 458 out: 459 ACPI_SERIAL_END(dock); 460 return (err); 461 } 462 463 static int 464 acpi_dock_probe(device_t dev) 465 { 466 ACPI_HANDLE h, tmp; 467 468 h = acpi_get_handle(dev); 469 if (acpi_disabled("dock") || 470 ACPI_FAILURE(AcpiGetHandle(h, "_DCK", &tmp))) 471 return (ENXIO); 472 473 device_set_desc(dev, "ACPI Docking Station"); 474 475 /* 476 * XXX Somewhere else in the kernel panics on "sysctl kern" if we 477 * return a negative value here (reprobe ok). 478 */ 479 return (0); 480 } 481 482 static int 483 acpi_dock_attach(device_t dev) 484 { 485 struct acpi_dock_softc *sc; 486 ACPI_HANDLE h; 487 488 sc = device_get_softc(dev); 489 h = acpi_get_handle(dev); 490 if (sc == NULL || h == NULL) 491 return (ENXIO); 492 493 sc->status = ACPI_DOCK_STATUS_UNKNOWN; 494 495 AcpiEvaluateObject(h, "_INI", NULL, NULL); 496 497 ACPI_SERIAL_BEGIN(dock); 498 499 acpi_dock_device_check(dev); 500 501 /* Get the sysctl tree */ 502 sc->sysctl_ctx = device_get_sysctl_ctx(dev); 503 sc->sysctl_tree = device_get_sysctl_tree(dev); 504 505 SYSCTL_ADD_INT(sc->sysctl_ctx, 506 SYSCTL_CHILDREN(sc->sysctl_tree), 507 OID_AUTO, "_sta", CTLFLAG_RD, 508 &sc->_sta, 0, "Dock _STA"); 509 SYSCTL_ADD_INT(sc->sysctl_ctx, 510 SYSCTL_CHILDREN(sc->sysctl_tree), 511 OID_AUTO, "_bdn", CTLFLAG_RD, 512 &sc->_bdn, 0, "Dock _BDN"); 513 SYSCTL_ADD_INT(sc->sysctl_ctx, 514 SYSCTL_CHILDREN(sc->sysctl_tree), 515 OID_AUTO, "_uid", CTLFLAG_RD, 516 &sc->_uid, 0, "Dock _UID"); 517 SYSCTL_ADD_PROC(sc->sysctl_ctx, 518 SYSCTL_CHILDREN(sc->sysctl_tree), 519 OID_AUTO, "status", 520 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, dev, 0, 521 acpi_dock_status_sysctl, "I", 522 "Dock/Undock operation"); 523 524 ACPI_SERIAL_END(dock); 525 526 AcpiInstallNotifyHandler(h, ACPI_ALL_NOTIFY, 527 acpi_dock_notify_handler, dev); 528 529 return (0); 530 } 531 532 static device_method_t acpi_dock_methods[] = { 533 /* Device interface */ 534 DEVMETHOD(device_probe, acpi_dock_probe), 535 DEVMETHOD(device_attach, acpi_dock_attach), 536 537 DEVMETHOD_END 538 }; 539 540 static driver_t acpi_dock_driver = { 541 "acpi_dock", 542 acpi_dock_methods, 543 sizeof(struct acpi_dock_softc), 544 }; 545 546 DRIVER_MODULE(acpi_dock, acpi, acpi_dock_driver, 0, 0); 547 MODULE_DEPEND(acpi_dock, acpi, 1, 1, 1); 548 ACPI_PNP_INFO(acpi_dock_pnp_ids); 549