1 /* $NetBSD: ehci_pci.c,v 1.52 2011/04/04 22:48:15 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 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). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: ehci_pci.c,v 1.52 2011/04/04 22:48:15 dyoung Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/queue.h> 41 42 #include <sys/bus.h> 43 44 #include <dev/pci/pcidevs.h> 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/usb_pci.h> 47 48 #include <dev/usb/usb.h> 49 #include <dev/usb/usbdi.h> 50 #include <dev/usb/usbdivar.h> 51 #include <dev/usb/usb_mem.h> 52 53 #include <dev/usb/ehcireg.h> 54 #include <dev/usb/ehcivar.h> 55 56 #ifdef EHCI_DEBUG 57 #define DPRINTF(x) if (ehcidebug) printf x 58 extern int ehcidebug; 59 #else 60 #define DPRINTF(x) 61 #endif 62 63 enum ehci_pci_quirk_flags { 64 EHCI_PCI_QUIRK_AMD_SB600 = 0x1, /* always need a quirk */ 65 EHCI_PCI_QUIRK_AMD_SB700 = 0x2, /* depends on the SMB revision */ 66 }; 67 68 static const struct pci_quirkdata ehci_pci_quirks[] = { 69 { PCI_VENDOR_ATI, PCI_PRODUCT_ATI_SB600_USB_EHCI, 70 EHCI_PCI_QUIRK_AMD_SB600 }, 71 { PCI_VENDOR_ATI, PCI_PRODUCT_ATI_SB700_USB_EHCI, 72 EHCI_PCI_QUIRK_AMD_SB700 }, 73 }; 74 75 static void ehci_release_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, 76 pcitag_t tag); 77 static void ehci_get_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, 78 pcitag_t tag); 79 static bool ehci_pci_suspend(device_t, const pmf_qual_t *); 80 static bool ehci_pci_resume(device_t, const pmf_qual_t *); 81 82 struct ehci_pci_softc { 83 ehci_softc_t sc; 84 pci_chipset_tag_t sc_pc; 85 pcitag_t sc_tag; 86 void *sc_ih; /* interrupt vectoring */ 87 }; 88 89 static int ehci_sb700_match(const struct pci_attach_args *pa); 90 static int ehci_apply_amd_quirks(struct ehci_pci_softc *sc); 91 enum ehci_pci_quirk_flags ehci_pci_lookup_quirkdata(pci_vendor_id_t, 92 pci_product_id_t); 93 94 #define EHCI_MAX_BIOS_WAIT 1000 /* ms */ 95 #define EHCI_SBx00_WORKAROUND_REG 0x50 96 #define EHCI_SBx00_WORKAROUND_ENABLE __BIT(27) 97 98 99 static int 100 ehci_pci_match(device_t parent, cfdata_t match, void *aux) 101 { 102 struct pci_attach_args *pa = (struct pci_attach_args *) aux; 103 104 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && 105 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && 106 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_EHCI) 107 return 1; 108 109 return 0; 110 } 111 112 static void 113 ehci_pci_attach(device_t parent, device_t self, void *aux) 114 { 115 struct ehci_pci_softc *sc = device_private(self); 116 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 117 pci_chipset_tag_t pc = pa->pa_pc; 118 pcitag_t tag = pa->pa_tag; 119 char const *intrstr; 120 pci_intr_handle_t ih; 121 pcireg_t csr; 122 const char *vendor; 123 char devinfo[256]; 124 usbd_status r; 125 int ncomp; 126 struct usb_pci *up; 127 int quirk; 128 129 sc->sc.sc_dev = self; 130 sc->sc.sc_bus.hci_private = sc; 131 132 aprint_naive(": USB controller\n"); 133 134 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 135 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 136 PCI_REVISION(pa->pa_class)); 137 138 /* Check for quirks */ 139 quirk = ehci_pci_lookup_quirkdata(PCI_VENDOR(pa->pa_id), 140 PCI_PRODUCT(pa->pa_id)); 141 142 /* Map I/O registers */ 143 if (pci_mapreg_map(pa, PCI_CBMEM, PCI_MAPREG_TYPE_MEM, 0, 144 &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) { 145 sc->sc.sc_size = 0; 146 aprint_error_dev(self, "can't map memory space\n"); 147 return; 148 } 149 150 /* Disable interrupts, so we don't get any spurious ones. */ 151 sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH); 152 DPRINTF(("%s: offs=%d\n", device_xname(self), sc->sc.sc_offs)); 153 EOWRITE2(&sc->sc, EHCI_USBINTR, 0); 154 155 sc->sc_pc = pc; 156 sc->sc_tag = tag; 157 sc->sc.sc_bus.dmatag = pa->pa_dmat; 158 159 /* Handle quirks */ 160 switch (quirk) { 161 case EHCI_PCI_QUIRK_AMD_SB600: 162 ehci_apply_amd_quirks(sc); 163 break; 164 case EHCI_PCI_QUIRK_AMD_SB700: 165 if (pci_find_device(NULL, ehci_sb700_match)) 166 ehci_apply_amd_quirks(sc); 167 break; 168 } 169 170 /* Enable the device. */ 171 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 172 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, 173 csr | PCI_COMMAND_MASTER_ENABLE); 174 175 /* Map and establish the interrupt. */ 176 if (pci_intr_map(pa, &ih)) { 177 aprint_error_dev(self, "couldn't map interrupt\n"); 178 goto fail; 179 } 180 181 /* 182 * Allocate IRQ 183 */ 184 intrstr = pci_intr_string(pc, ih); 185 sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, ehci_intr, sc); 186 if (sc->sc_ih == NULL) { 187 aprint_error_dev(self, "couldn't establish interrupt"); 188 if (intrstr != NULL) 189 aprint_error(" at %s", intrstr); 190 aprint_error("\n"); 191 return; 192 } 193 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 194 195 switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { 196 case PCI_USBREV_PRE_1_0: 197 case PCI_USBREV_1_0: 198 case PCI_USBREV_1_1: 199 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 200 aprint_verbose_dev(self, "pre-2.0 USB rev\n"); 201 return; 202 case PCI_USBREV_2_0: 203 sc->sc.sc_bus.usbrev = USBREV_2_0; 204 break; 205 default: 206 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 207 break; 208 } 209 210 /* Figure out vendor for root hub descriptor. */ 211 vendor = pci_findvendor(pa->pa_id); 212 sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); 213 if (vendor) 214 strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor)); 215 else 216 snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), 217 "vendor 0x%04x", PCI_VENDOR(pa->pa_id)); 218 219 /* Enable workaround for dropped interrupts as required */ 220 switch (sc->sc.sc_id_vendor) { 221 case PCI_VENDOR_ATI: 222 case PCI_VENDOR_VIATECH: 223 sc->sc.sc_flags |= EHCIF_DROPPED_INTR_WORKAROUND; 224 aprint_normal_dev(self, "dropped intr workaround enabled\n"); 225 break; 226 default: 227 break; 228 } 229 230 /* 231 * Find companion controllers. According to the spec they always 232 * have lower function numbers so they should be enumerated already. 233 */ 234 const u_int maxncomp = EHCI_HCS_N_CC(EREAD4(&sc->sc, EHCI_HCSPARAMS)); 235 KASSERT(maxncomp <= EHCI_COMPANION_MAX); 236 ncomp = 0; 237 TAILQ_FOREACH(up, &ehci_pci_alldevs, next) { 238 if (up->bus == pa->pa_bus && up->device == pa->pa_device 239 && !up->claimed) { 240 DPRINTF(("ehci_pci_attach: companion %s\n", 241 device_xname(up->usb))); 242 sc->sc.sc_comps[ncomp++] = up->usb; 243 up->claimed = true; 244 if (ncomp == maxncomp) 245 break; 246 } 247 } 248 sc->sc.sc_ncomp = ncomp; 249 250 ehci_get_ownership(&sc->sc, pc, tag); 251 252 r = ehci_init(&sc->sc); 253 if (r != USBD_NORMAL_COMPLETION) { 254 aprint_error_dev(self, "init failed, error=%d\n", r); 255 goto fail; 256 } 257 258 if (!pmf_device_register1(self, ehci_pci_suspend, ehci_pci_resume, 259 ehci_shutdown)) 260 aprint_error_dev(self, "couldn't establish power handler\n"); 261 262 /* Attach usb device. */ 263 sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint); 264 return; 265 266 fail: 267 if (sc->sc_ih) { 268 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 269 sc->sc_ih = NULL; 270 } 271 if (sc->sc.sc_size) { 272 ehci_release_ownership(&sc->sc, sc->sc_pc, sc->sc_tag); 273 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 274 sc->sc.sc_size = 0; 275 } 276 return; 277 } 278 279 static int 280 ehci_pci_detach(device_t self, int flags) 281 { 282 struct ehci_pci_softc *sc = device_private(self); 283 int rv; 284 285 rv = ehci_detach(&sc->sc, flags); 286 if (rv) 287 return rv; 288 289 pmf_device_deregister(self); 290 ehci_shutdown(self, flags); 291 292 /* disable interrupts */ 293 EOWRITE2(&sc->sc, EHCI_USBINTR, 0); 294 /* XXX grotty hack to flush the write */ 295 (void)EOREAD2(&sc->sc, EHCI_USBINTR); 296 297 if (sc->sc_ih != NULL) { 298 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 299 sc->sc_ih = NULL; 300 } 301 if (sc->sc.sc_size) { 302 ehci_release_ownership(&sc->sc, sc->sc_pc, sc->sc_tag); 303 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 304 sc->sc.sc_size = 0; 305 } 306 307 return 0; 308 } 309 310 CFATTACH_DECL3_NEW(ehci_pci, sizeof(struct ehci_pci_softc), 311 ehci_pci_match, ehci_pci_attach, ehci_pci_detach, ehci_activate, NULL, 312 ehci_childdet, DVF_DETACH_SHUTDOWN); 313 314 #ifdef EHCI_DEBUG 315 static void 316 ehci_dump_caps(ehci_softc_t *sc, pci_chipset_tag_t pc, pcitag_t tag) 317 { 318 uint32_t cparams, legctlsts, addr, cap, id; 319 int maxdump = 10; 320 321 cparams = EREAD4(sc, EHCI_HCCPARAMS); 322 addr = EHCI_HCC_EECP(cparams); 323 while (addr != 0) { 324 cap = pci_conf_read(pc, tag, addr); 325 id = EHCI_CAP_GET_ID(cap); 326 switch (id) { 327 case EHCI_CAP_ID_LEGACY: 328 legctlsts = pci_conf_read(pc, tag, 329 addr + PCI_EHCI_USBLEGCTLSTS); 330 printf("ehci_dump_caps: legsup=0x%08x " 331 "legctlsts=0x%08x\n", cap, legctlsts); 332 break; 333 default: 334 printf("ehci_dump_caps: cap=0x%08x\n", cap); 335 break; 336 } 337 if (--maxdump < 0) 338 break; 339 addr = EHCI_CAP_GET_NEXT(cap); 340 } 341 } 342 #endif 343 344 static void 345 ehci_release_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, pcitag_t tag) 346 { 347 const char *devname = device_xname(sc->sc_dev); 348 uint32_t cparams, addr, cap; 349 pcireg_t legsup; 350 int maxcap = 10; 351 352 cparams = EREAD4(sc, EHCI_HCCPARAMS); 353 addr = EHCI_HCC_EECP(cparams); 354 while (addr != 0) { 355 cap = pci_conf_read(pc, tag, addr); 356 if (EHCI_CAP_GET_ID(cap) != EHCI_CAP_ID_LEGACY) 357 goto next; 358 legsup = pci_conf_read(pc, tag, addr + PCI_EHCI_USBLEGSUP); 359 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGSUP, 360 legsup & ~EHCI_LEG_HC_OS_OWNED); 361 362 next: 363 if (--maxcap < 0) { 364 aprint_normal("%s: broken extended capabilities " 365 "ignored\n", devname); 366 return; 367 } 368 addr = EHCI_CAP_GET_NEXT(cap); 369 } 370 } 371 372 static void 373 ehci_get_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, pcitag_t tag) 374 { 375 const char *devname = device_xname(sc->sc_dev); 376 uint32_t cparams, addr, cap; 377 pcireg_t legsup; 378 int maxcap = 10; 379 int ms; 380 381 #ifdef EHCI_DEBUG 382 if (ehcidebug) 383 ehci_dump_caps(sc, pc, tag); 384 #endif 385 cparams = EREAD4(sc, EHCI_HCCPARAMS); 386 addr = EHCI_HCC_EECP(cparams); 387 while (addr != 0) { 388 cap = pci_conf_read(pc, tag, addr); 389 if (EHCI_CAP_GET_ID(cap) != EHCI_CAP_ID_LEGACY) 390 goto next; 391 legsup = pci_conf_read(pc, tag, addr + PCI_EHCI_USBLEGSUP); 392 /* Ask BIOS to give up ownership */ 393 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGSUP, 394 legsup | EHCI_LEG_HC_OS_OWNED); 395 if (legsup & EHCI_LEG_HC_BIOS_OWNED) { 396 for (ms = 0; ms < EHCI_MAX_BIOS_WAIT; ms++) { 397 legsup = pci_conf_read(pc, tag, 398 addr + PCI_EHCI_USBLEGSUP); 399 if (!(legsup & EHCI_LEG_HC_BIOS_OWNED)) 400 break; 401 delay(1000); 402 } 403 if (ms == EHCI_MAX_BIOS_WAIT) { 404 aprint_normal("%s: BIOS refuses to give up " 405 "ownership, using force\n", devname); 406 pci_conf_write(pc, tag, 407 addr + PCI_EHCI_USBLEGSUP, 0); 408 } else 409 aprint_verbose("%s: BIOS has given up " 410 "ownership\n", devname); 411 } 412 413 /* Disable SMIs */ 414 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGCTLSTS, 415 EHCI_LEG_EXT_SMI_BAR | EHCI_LEG_EXT_SMI_PCICMD | 416 EHCI_LEG_EXT_SMI_OS_CHANGE); 417 418 next: 419 if (--maxcap < 0) { 420 aprint_normal("%s: broken extended capabilities " 421 "ignored\n", devname); 422 return; 423 } 424 addr = EHCI_CAP_GET_NEXT(cap); 425 } 426 427 } 428 429 static bool 430 ehci_pci_suspend(device_t dv, const pmf_qual_t *qual) 431 { 432 struct ehci_pci_softc *sc = device_private(dv); 433 434 ehci_suspend(dv, qual); 435 ehci_release_ownership(&sc->sc, sc->sc_pc, sc->sc_tag); 436 437 return true; 438 } 439 440 static bool 441 ehci_pci_resume(device_t dv, const pmf_qual_t *qual) 442 { 443 struct ehci_pci_softc *sc = device_private(dv); 444 445 ehci_get_ownership(&sc->sc, sc->sc_pc, sc->sc_tag); 446 return ehci_resume(dv, qual); 447 } 448 449 static int 450 ehci_sb700_match(const struct pci_attach_args *pa) 451 { 452 if (!(PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ATI && 453 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_SB600_SMB)) 454 return 0; 455 456 switch (PCI_REVISION(pa->pa_class)) { 457 case 0x3a: 458 case 0x3b: 459 return 1; 460 } 461 462 return 0; 463 } 464 465 static int 466 ehci_apply_amd_quirks(struct ehci_pci_softc *sc) 467 { 468 pcireg_t value; 469 470 aprint_normal_dev(sc->sc.sc_dev, 471 "applying AMD SB600/SB700 USB freeze workaround\n"); 472 value = pci_conf_read(sc->sc_pc, sc->sc_tag, EHCI_SBx00_WORKAROUND_REG); 473 pci_conf_write(sc->sc_pc, sc->sc_tag, EHCI_SBx00_WORKAROUND_REG, 474 value | EHCI_SBx00_WORKAROUND_ENABLE); 475 476 return 0; 477 } 478 479 enum ehci_pci_quirk_flags 480 ehci_pci_lookup_quirkdata(pci_vendor_id_t vendor, pci_product_id_t product) 481 { 482 int i; 483 484 for (i = 0; i < __arraycount(ehci_pci_quirks); i++) { 485 if (vendor == ehci_pci_quirks[i].vendor && 486 product == ehci_pci_quirks[i].product) 487 return ehci_pci_quirks[i].quirks; 488 } 489 return 0; 490 } 491 492