2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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]
14 * This file is licenced under the GPL.
18 #error "This file is PCI bus glue. CONFIG_PCI must be defined."
21 #include <linux/pci.h>
25 /* constants used to work around PM-related transfer
26 * glitches in some AMD 700 series southbridges
28 #define AB_REG_BAR 0xf0
29 #define AB_INDX(addr) ((addr) + 0x00)
30 #define AB_DATA(addr) ((addr) + 0x04)
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
39 static struct pci_dev *amd_smbus_dev;
40 static struct pci_dev *amd_hb_dev;
41 static int amd_ohci_iso_count;
43 /*-------------------------------------------------------------------------*/
45 static int broken_suspend(struct usb_hcd *hcd)
47 device_init_wakeup(&hcd->self.root_hub->dev, 0);
51 /* AMD 756, for most chips (early revs), corrupts register
52 * values on read ... so enable the vendor workaround.
54 static int ohci_quirk_amd756(struct usb_hcd *hcd)
56 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
58 ohci->flags = OHCI_QUIRK_AMD756;
59 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
61 /* also erratum 10 (suspend/resume issues) */
62 return broken_suspend(hcd);
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 ...)
69 static int ohci_quirk_opti(struct usb_hcd *hcd)
71 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
73 ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
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
82 static int ohci_quirk_ns(struct usb_hcd *hcd)
84 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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);
92 ohci->flags |= OHCI_QUIRK_SUPERIO;
93 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
100 /* Check for Compaq's ZFMicro chipset, which needs short
101 * delays before control or bulk queues get re-activated
102 * in finish_unlinks()
104 static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
106 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
108 ohci->flags |= OHCI_QUIRK_ZFMICRO;
109 ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");
114 /* Check for Toshiba SCC OHCI which has big endian registers
115 * and little endian in memory data structures
117 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
119 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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.
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");
131 ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
136 /* Check for NEC chip and apply quirk for allegedly lost interrupts.
139 static void ohci_quirk_nec_worker(struct work_struct *work)
141 struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
144 status = ohci_init(ohci);
146 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
147 "ohci_init", status);
151 status = ohci_restart(ohci);
153 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
154 "ohci_restart", status);
157 static int ohci_quirk_nec(struct usb_hcd *hcd)
159 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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");
168 static int ohci_quirk_amd700(struct usb_hcd *hcd)
170 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
174 amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
175 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
179 pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
180 if ((rev > 0x3b) || (rev < 0x30)) {
181 pci_dev_put(amd_smbus_dev);
182 amd_smbus_dev = NULL;
186 amd_ohci_iso_count++;
189 amd_hb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9600, NULL);
191 ohci->flags |= OHCI_QUIRK_AMD_ISO;
192 ohci_dbg(ohci, "enabled AMD ISO transfers quirk\n");
198 * The hardware normally enables the A-link power management feature, which
199 * lets the system lower the power consumption in idle states.
201 * Assume the system is configured to have USB 1.1 ISO transfers going
202 * to or from a USB device. Without this quirk, that stream may stutter
203 * or have breaks occasionally. For transfers going to speakers, this
204 * makes a very audible mess...
206 * That audio playback corruption is due to the audio stream getting
207 * interrupted occasionally when the link goes in lower power state
208 * This USB quirk prevents the link going into that lower power state
209 * during audio playback or other ISO operations.
211 static void quirk_amd_pll(int on)
215 u32 bit = (on > 0) ? 1 : 0;
217 pci_read_config_dword(amd_smbus_dev, AB_REG_BAR, &addr);
219 /* BIT names/meanings are NDA-protected, sorry ... */
221 outl(AX_INDXC, AB_INDX(addr));
222 outl(0x40, AB_DATA(addr));
223 outl(AX_DATAC, AB_INDX(addr));
224 val = inl(AB_DATA(addr));
225 val &= ~((1 << 3) | (1 << 4) | (1 << 9));
226 val |= (bit << 3) | ((!bit) << 4) | ((!bit) << 9);
227 outl(val, AB_DATA(addr));
231 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);
233 pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
234 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
235 val |= bit | (bit << 3) | (bit << 12);
236 val |= ((!bit) << 4) | ((!bit) << 9);
237 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);
240 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);
242 pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
245 pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);
249 static void amd_iso_dev_put(void)
251 amd_ohci_iso_count--;
252 if (amd_ohci_iso_count == 0) {
254 pci_dev_put(amd_smbus_dev);
255 amd_smbus_dev = NULL;
258 pci_dev_put(amd_hb_dev);
265 /* List of quirks for OHCI */
266 static const struct pci_device_id ohci_pci_quirks[] = {
268 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
269 .driver_data = (unsigned long)ohci_quirk_amd756,
272 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
273 .driver_data = (unsigned long)ohci_quirk_opti,
276 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
277 .driver_data = (unsigned long)ohci_quirk_ns,
280 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
281 .driver_data = (unsigned long)ohci_quirk_zfmicro,
284 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
285 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
288 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
289 .driver_data = (unsigned long)ohci_quirk_nec,
292 /* Toshiba portege 4000 */
293 .vendor = PCI_VENDOR_ID_AL,
295 .subvendor = PCI_VENDOR_ID_TOSHIBA,
297 .driver_data = (unsigned long) broken_suspend,
300 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
301 .driver_data = (unsigned long) broken_suspend,
304 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
305 .driver_data = (unsigned long)ohci_quirk_amd700,
308 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
309 .driver_data = (unsigned long)ohci_quirk_amd700,
312 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
313 .driver_data = (unsigned long)ohci_quirk_amd700,
316 /* FIXME for some of the early AMD 760 southbridges, OHCI
317 * won't work at all. blacklist them.
323 static int ohci_pci_reset (struct usb_hcd *hcd)
325 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
328 if (hcd->self.controller) {
329 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
330 const struct pci_device_id *quirk_id;
332 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
333 if (quirk_id != NULL) {
334 int (*quirk)(struct usb_hcd *ohci);
335 quirk = (void *)quirk_id->driver_data;
340 ohci_hcd_init (ohci);
341 return ohci_init (ohci);
347 static int __devinit ohci_pci_start (struct usb_hcd *hcd)
349 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
352 #ifdef CONFIG_PM /* avoid warnings about unused pdev */
353 if (hcd->self.controller) {
354 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
356 /* RWC may not be set for add-in PCI cards, since boot
357 * firmware probably ignored them. This transfers PCI
358 * PM wakeup capabilities (once the PCI layer is fixed).
360 if (device_may_wakeup(&pdev->dev))
361 ohci->hc_control |= OHCI_CTRL_RWC;
363 #endif /* CONFIG_PM */
365 ret = ohci_run (ohci);
367 ohci_err (ohci, "can't start\n");
375 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
377 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
381 /* Root hub was already suspended. Disable irq emission and
382 * mark HW unaccessible, bail out if RH has been resumed. Use
383 * the spinlock to properly synchronize with possible pending
384 * RH suspend or resume activity.
386 * This is still racy as hcd->state is manipulated outside of
387 * any locks =P But that will be a different fix.
389 spin_lock_irqsave (&ohci->lock, flags);
390 if (hcd->state != HC_STATE_SUSPENDED) {
394 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
395 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
397 /* make sure snapshot being resumed re-enumerates everything */
398 if (message.event == PM_EVENT_PRETHAW)
399 ohci_usb_reset(ohci);
401 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
403 spin_unlock_irqrestore (&ohci->lock, flags);
409 static int ohci_pci_resume (struct usb_hcd *hcd)
411 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
412 ohci_finish_controller_resume(hcd);
416 #endif /* CONFIG_PM */
419 /*-------------------------------------------------------------------------*/
421 static const struct hc_driver ohci_pci_hc_driver = {
422 .description = hcd_name,
423 .product_desc = "OHCI Host Controller",
424 .hcd_priv_size = sizeof(struct ohci_hcd),
427 * generic hardware linkage
430 .flags = HCD_MEMORY | HCD_USB11,
433 * basic lifecycle operations
435 .reset = ohci_pci_reset,
436 .start = ohci_pci_start,
438 .shutdown = ohci_shutdown,
441 .pci_suspend = ohci_pci_suspend,
442 .pci_resume = ohci_pci_resume,
446 * managing i/o requests and associated device resources
448 .urb_enqueue = ohci_urb_enqueue,
449 .urb_dequeue = ohci_urb_dequeue,
450 .endpoint_disable = ohci_endpoint_disable,
455 .get_frame_number = ohci_get_frame,
460 .hub_status_data = ohci_hub_status_data,
461 .hub_control = ohci_hub_control,
462 .hub_irq_enable = ohci_rhsc_enable,
464 .bus_suspend = ohci_bus_suspend,
465 .bus_resume = ohci_bus_resume,
467 .start_port_reset = ohci_start_port_reset,
470 /*-------------------------------------------------------------------------*/
473 static const struct pci_device_id pci_ids [] = { {
474 /* handle any USB OHCI controller */
475 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
476 .driver_data = (unsigned long) &ohci_pci_hc_driver,
477 }, { /* end: all zeroes */ }
479 MODULE_DEVICE_TABLE (pci, pci_ids);
481 /* pci driver glue; this is a "new style" PCI driver module */
482 static struct pci_driver ohci_pci_driver = {
483 .name = (char *) hcd_name,
486 .probe = usb_hcd_pci_probe,
487 .remove = usb_hcd_pci_remove,
490 .suspend = usb_hcd_pci_suspend,
491 .resume = usb_hcd_pci_resume,
494 .shutdown = usb_hcd_pci_shutdown,