1 /* 2 * OHCI HCD (Host Controller Driver) for USB. 3 * 4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> 6 * 7 * [ Initialisation is based on Linus' ] 8 * [ uhci code and gregs ohci fragments ] 9 * [ (C) Copyright 1999 Linus Torvalds ] 10 * [ (C) Copyright 1999 Gregory P. Smith] 11 * 12 * PCI Bus Glue 13 * 14 * This file is licenced under the GPL. 15 */ 16 17 #ifndef CONFIG_PCI 18 #error "This file is PCI bus glue. CONFIG_PCI must be defined." 19 #endif 20 21 #include <linux/pci.h> 22 #include <linux/io.h> 23 24 25 /* constants used to work around PM-related transfer 26 * glitches in some AMD 700 series southbridges 27 */ 28 #define AB_REG_BAR 0xf0 29 #define AB_INDX(addr) ((addr) + 0x00) 30 #define AB_DATA(addr) ((addr) + 0x04) 31 #define AX_INDXC 0X30 32 #define AX_DATAC 0x34 33 34 #define NB_PCIE_INDX_ADDR 0xe0 35 #define NB_PCIE_INDX_DATA 0xe4 36 #define PCIE_P_CNTL 0x10040 37 #define BIF_NB 0x10002 38 39 static struct pci_dev *amd_smbus_dev; 40 static struct pci_dev *amd_hb_dev; 41 static int amd_ohci_iso_count; 42 43 /*-------------------------------------------------------------------------*/ 44 45 static int broken_suspend(struct usb_hcd *hcd) 46 { 47 device_init_wakeup(&hcd->self.root_hub->dev, 0); 48 return 0; 49 } 50 51 /* AMD 756, for most chips (early revs), corrupts register 52 * values on read ... so enable the vendor workaround. 53 */ 54 static int ohci_quirk_amd756(struct usb_hcd *hcd) 55 { 56 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 57 58 ohci->flags = OHCI_QUIRK_AMD756; 59 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n"); 60 61 /* also erratum 10 (suspend/resume issues) */ 62 return broken_suspend(hcd); 63 } 64 65 /* Apple's OHCI driver has a lot of bizarre workarounds 66 * for this chip. Evidently control and bulk lists 67 * can get confused. (B&W G3 models, and ...) 68 */ 69 static int ohci_quirk_opti(struct usb_hcd *hcd) 70 { 71 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 72 73 ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n"); 74 75 return 0; 76 } 77 78 /* Check for NSC87560. We have to look at the bridge (fn1) to 79 * identify the USB (fn2). This quirk might apply to more or 80 * even all NSC stuff. 81 */ 82 static int ohci_quirk_ns(struct usb_hcd *hcd) 83 { 84 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 85 struct pci_dev *b; 86 87 b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); 88 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO 89 && b->vendor == PCI_VENDOR_ID_NS) { 90 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 91 92 ohci->flags |= OHCI_QUIRK_SUPERIO; 93 ohci_dbg (ohci, "Using NSC SuperIO setup\n"); 94 } 95 pci_dev_put(b); 96 97 return 0; 98 } 99 100 /* Check for Compaq's ZFMicro chipset, which needs short 101 * delays before control or bulk queues get re-activated 102 * in finish_unlinks() 103 */ 104 static int ohci_quirk_zfmicro(struct usb_hcd *hcd) 105 { 106 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 107 108 ohci->flags |= OHCI_QUIRK_ZFMICRO; 109 ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n"); 110 111 return 0; 112 } 113 114 /* Check for Toshiba SCC OHCI which has big endian registers 115 * and little endian in memory data structures 116 */ 117 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd) 118 { 119 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 120 121 /* That chip is only present in the southbridge of some 122 * cell based platforms which are supposed to select 123 * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if 124 * that was the case though. 125 */ 126 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO 127 ohci->flags |= OHCI_QUIRK_BE_MMIO; 128 ohci_dbg (ohci, "enabled big endian Toshiba quirk\n"); 129 return 0; 130 #else 131 ohci_err (ohci, "unsupported big endian Toshiba quirk\n"); 132 return -ENXIO; 133 #endif 134 } 135 136 /* Check for NEC chip and apply quirk for allegedly lost interrupts. 137 */ 138 139 static void ohci_quirk_nec_worker(struct work_struct *work) 140 { 141 struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work); 142 int status; 143 144 status = ohci_init(ohci); 145 if (status != 0) { 146 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n", 147 "ohci_init", status); 148 return; 149 } 150 151 status = ohci_restart(ohci); 152 if (status != 0) 153 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n", 154 "ohci_restart", status); 155 } 156 157 static int ohci_quirk_nec(struct usb_hcd *hcd) 158 { 159 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 160 161 ohci->flags |= OHCI_QUIRK_NEC; 162 INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker); 163 ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n"); 164 165 return 0; 166 } 167 168 static int ohci_quirk_amd700(struct usb_hcd *hcd) 169 { 170 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 171 u8 rev = 0; 172 173 if (!amd_smbus_dev) 174 amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 175 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL); 176 if (!amd_smbus_dev) 177 return 0; 178 179 pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev); 180 181 /* SB800 needs pre-fetch fix */ 182 if ((rev >= 0x40) && (rev <= 0x4f)) { 183 ohci->flags |= OHCI_QUIRK_AMD_PREFETCH; 184 ohci_dbg(ohci, "enabled AMD prefetch quirk\n"); 185 } 186 187 if ((rev > 0x3b) || (rev < 0x30)) { 188 pci_dev_put(amd_smbus_dev); 189 amd_smbus_dev = NULL; 190 return 0; 191 } 192 193 amd_ohci_iso_count++; 194 195 if (!amd_hb_dev) 196 amd_hb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9600, NULL); 197 198 ohci->flags |= OHCI_QUIRK_AMD_ISO; 199 ohci_dbg(ohci, "enabled AMD ISO transfers quirk\n"); 200 201 return 0; 202 } 203 204 /* 205 * The hardware normally enables the A-link power management feature, which 206 * lets the system lower the power consumption in idle states. 207 * 208 * Assume the system is configured to have USB 1.1 ISO transfers going 209 * to or from a USB device. Without this quirk, that stream may stutter 210 * or have breaks occasionally. For transfers going to speakers, this 211 * makes a very audible mess... 212 * 213 * That audio playback corruption is due to the audio stream getting 214 * interrupted occasionally when the link goes in lower power state 215 * This USB quirk prevents the link going into that lower power state 216 * during audio playback or other ISO operations. 217 */ 218 static void quirk_amd_pll(int on) 219 { 220 u32 addr; 221 u32 val; 222 u32 bit = (on > 0) ? 1 : 0; 223 224 pci_read_config_dword(amd_smbus_dev, AB_REG_BAR, &addr); 225 226 /* BIT names/meanings are NDA-protected, sorry ... */ 227 228 outl(AX_INDXC, AB_INDX(addr)); 229 outl(0x40, AB_DATA(addr)); 230 outl(AX_DATAC, AB_INDX(addr)); 231 val = inl(AB_DATA(addr)); 232 val &= ~((1 << 3) | (1 << 4) | (1 << 9)); 233 val |= (bit << 3) | ((!bit) << 4) | ((!bit) << 9); 234 outl(val, AB_DATA(addr)); 235 236 if (amd_hb_dev) { 237 addr = PCIE_P_CNTL; 238 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr); 239 240 pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val); 241 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12)); 242 val |= bit | (bit << 3) | (bit << 12); 243 val |= ((!bit) << 4) | ((!bit) << 9); 244 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val); 245 246 addr = BIF_NB; 247 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr); 248 249 pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val); 250 val &= ~(1 << 8); 251 val |= bit << 8; 252 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val); 253 } 254 } 255 256 static void amd_iso_dev_put(void) 257 { 258 amd_ohci_iso_count--; 259 if (amd_ohci_iso_count == 0) { 260 if (amd_smbus_dev) { 261 pci_dev_put(amd_smbus_dev); 262 amd_smbus_dev = NULL; 263 } 264 if (amd_hb_dev) { 265 pci_dev_put(amd_hb_dev); 266 amd_hb_dev = NULL; 267 } 268 } 269 270 } 271 272 static void sb800_prefetch(struct ohci_hcd *ohci, int on) 273 { 274 struct pci_dev *pdev; 275 u16 misc; 276 277 pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller); 278 pci_read_config_word(pdev, 0x50, &misc); 279 if (on == 0) 280 pci_write_config_word(pdev, 0x50, misc & 0xfcff); 281 else 282 pci_write_config_word(pdev, 0x50, misc | 0x0300); 283 } 284 285 /* List of quirks for OHCI */ 286 static const struct pci_device_id ohci_pci_quirks[] = { 287 { 288 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c), 289 .driver_data = (unsigned long)ohci_quirk_amd756, 290 }, 291 { 292 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861), 293 .driver_data = (unsigned long)ohci_quirk_opti, 294 }, 295 { 296 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID), 297 .driver_data = (unsigned long)ohci_quirk_ns, 298 }, 299 { 300 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8), 301 .driver_data = (unsigned long)ohci_quirk_zfmicro, 302 }, 303 { 304 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6), 305 .driver_data = (unsigned long)ohci_quirk_toshiba_scc, 306 }, 307 { 308 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB), 309 .driver_data = (unsigned long)ohci_quirk_nec, 310 }, 311 { 312 /* Toshiba portege 4000 */ 313 .vendor = PCI_VENDOR_ID_AL, 314 .device = 0x5237, 315 .subvendor = PCI_VENDOR_ID_TOSHIBA, 316 .subdevice = 0x0004, 317 .driver_data = (unsigned long) broken_suspend, 318 }, 319 { 320 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152), 321 .driver_data = (unsigned long) broken_suspend, 322 }, 323 { 324 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397), 325 .driver_data = (unsigned long)ohci_quirk_amd700, 326 }, 327 { 328 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398), 329 .driver_data = (unsigned long)ohci_quirk_amd700, 330 }, 331 { 332 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399), 333 .driver_data = (unsigned long)ohci_quirk_amd700, 334 }, 335 336 /* FIXME for some of the early AMD 760 southbridges, OHCI 337 * won't work at all. blacklist them. 338 */ 339 340 {}, 341 }; 342 343 static int ohci_pci_reset (struct usb_hcd *hcd) 344 { 345 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 346 int ret = 0; 347 348 if (hcd->self.controller) { 349 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 350 const struct pci_device_id *quirk_id; 351 352 quirk_id = pci_match_id(ohci_pci_quirks, pdev); 353 if (quirk_id != NULL) { 354 int (*quirk)(struct usb_hcd *ohci); 355 quirk = (void *)quirk_id->driver_data; 356 ret = quirk(hcd); 357 } 358 } 359 if (ret == 0) { 360 ohci_hcd_init (ohci); 361 return ohci_init (ohci); 362 } 363 return ret; 364 } 365 366 367 static int __devinit ohci_pci_start (struct usb_hcd *hcd) 368 { 369 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 370 int ret; 371 372 #ifdef CONFIG_PM /* avoid warnings about unused pdev */ 373 if (hcd->self.controller) { 374 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 375 376 /* RWC may not be set for add-in PCI cards, since boot 377 * firmware probably ignored them. This transfers PCI 378 * PM wakeup capabilities. 379 */ 380 if (device_can_wakeup(&pdev->dev)) 381 ohci->hc_control |= OHCI_CTRL_RWC; 382 } 383 #endif /* CONFIG_PM */ 384 385 ret = ohci_run (ohci); 386 if (ret < 0) { 387 ohci_err (ohci, "can't start\n"); 388 ohci_stop (hcd); 389 } 390 return ret; 391 } 392 393 #ifdef CONFIG_PM 394 395 static int ohci_pci_suspend(struct usb_hcd *hcd) 396 { 397 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 398 unsigned long flags; 399 int rc = 0; 400 401 /* Root hub was already suspended. Disable irq emission and 402 * mark HW unaccessible, bail out if RH has been resumed. Use 403 * the spinlock to properly synchronize with possible pending 404 * RH suspend or resume activity. 405 * 406 * This is still racy as hcd->state is manipulated outside of 407 * any locks =P But that will be a different fix. 408 */ 409 spin_lock_irqsave (&ohci->lock, flags); 410 if (hcd->state != HC_STATE_SUSPENDED) { 411 rc = -EINVAL; 412 goto bail; 413 } 414 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); 415 (void)ohci_readl(ohci, &ohci->regs->intrdisable); 416 417 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 418 bail: 419 spin_unlock_irqrestore (&ohci->lock, flags); 420 421 return rc; 422 } 423 424 425 static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated) 426 { 427 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 428 429 /* Make sure resume from hibernation re-enumerates everything */ 430 if (hibernated) 431 ohci_usb_reset(hcd_to_ohci(hcd)); 432 433 ohci_finish_controller_resume(hcd); 434 return 0; 435 } 436 437 #endif /* CONFIG_PM */ 438 439 440 /*-------------------------------------------------------------------------*/ 441 442 static const struct hc_driver ohci_pci_hc_driver = { 443 .description = hcd_name, 444 .product_desc = "OHCI Host Controller", 445 .hcd_priv_size = sizeof(struct ohci_hcd), 446 447 /* 448 * generic hardware linkage 449 */ 450 .irq = ohci_irq, 451 .flags = HCD_MEMORY | HCD_USB11, 452 453 /* 454 * basic lifecycle operations 455 */ 456 .reset = ohci_pci_reset, 457 .start = ohci_pci_start, 458 .stop = ohci_stop, 459 .shutdown = ohci_shutdown, 460 461 #ifdef CONFIG_PM 462 .pci_suspend = ohci_pci_suspend, 463 .pci_resume = ohci_pci_resume, 464 #endif 465 466 /* 467 * managing i/o requests and associated device resources 468 */ 469 .urb_enqueue = ohci_urb_enqueue, 470 .urb_dequeue = ohci_urb_dequeue, 471 .endpoint_disable = ohci_endpoint_disable, 472 473 /* 474 * scheduling support 475 */ 476 .get_frame_number = ohci_get_frame, 477 478 /* 479 * root hub support 480 */ 481 .hub_status_data = ohci_hub_status_data, 482 .hub_control = ohci_hub_control, 483 #ifdef CONFIG_PM 484 .bus_suspend = ohci_bus_suspend, 485 .bus_resume = ohci_bus_resume, 486 #endif 487 .start_port_reset = ohci_start_port_reset, 488 }; 489 490 /*-------------------------------------------------------------------------*/ 491 492 493 static const struct pci_device_id pci_ids [] = { { 494 /* handle any USB OHCI controller */ 495 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0), 496 .driver_data = (unsigned long) &ohci_pci_hc_driver, 497 }, { /* end: all zeroes */ } 498 }; 499 MODULE_DEVICE_TABLE (pci, pci_ids); 500 501 /* pci driver glue; this is a "new style" PCI driver module */ 502 static struct pci_driver ohci_pci_driver = { 503 .name = (char *) hcd_name, 504 .id_table = pci_ids, 505 506 .probe = usb_hcd_pci_probe, 507 .remove = usb_hcd_pci_remove, 508 .shutdown = usb_hcd_pci_shutdown, 509 510 #ifdef CONFIG_PM_SLEEP 511 .driver = { 512 .pm = &usb_hcd_pci_pm_ops 513 }, 514 #endif 515 }; 516