2 * EHCI HCD (Host Controller Driver) PCI Bus Glue.
4 * Copyright (c) 2000-2004 by David Brownell
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #error "This file is PCI bus glue. CONFIG_PCI must be defined."
25 /*-------------------------------------------------------------------------*/
27 /* called after powerup, by probe or system-pm "wakeup" */
28 static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
33 /* optional debug port, normally in the first BAR */
34 temp = pci_find_capability(pdev, 0x0a);
36 pci_read_config_dword(pdev, temp, &temp);
38 if ((temp & (3 << 13)) == (1 << 13)) {
40 ehci->debug = ehci_to_hcd(ehci)->regs + temp;
41 temp = ehci_readl(ehci, &ehci->debug->control);
42 ehci_info(ehci, "debug port %d%s\n",
43 HCS_DEBUG_PORT(ehci->hcs_params),
47 if (!(temp & DBGP_ENABLED))
52 /* we expect static quirk code to handle the "extended capabilities"
53 * (currently just BIOS handoff) allowed starting with EHCI 0.96
56 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
57 retval = pci_set_mwi(pdev);
59 ehci_dbg(ehci, "MWI active\n");
64 /* called during probe() after chip reset completes */
65 static int ehci_pci_setup(struct usb_hcd *hcd)
67 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
68 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
69 struct pci_dev *p_smbus;
74 switch (pdev->vendor) {
75 case PCI_VENDOR_ID_TOSHIBA_2:
76 /* celleb's companion chip */
77 if (pdev->device == 0x01b5) {
78 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
79 ehci->big_endian_mmio = 1;
82 "unsupported big endian Toshiba quirk\n");
88 ehci->caps = hcd->regs;
89 ehci->regs = hcd->regs +
90 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
92 dbg_hcs_params(ehci, "reset");
93 dbg_hcc_params(ehci, "reset");
95 /* ehci_init() causes memory for DMA transfers to be
96 * allocated. Thus, any vendor-specific workarounds based on
97 * limiting the type of memory used for DMA transfers must
98 * happen before ehci_init() is called. */
99 switch (pdev->vendor) {
100 case PCI_VENDOR_ID_NVIDIA:
101 /* NVidia reports that certain chips don't handle
102 * QH, ITD, or SITD addresses above 2GB. (But TD,
103 * data buffer, and periodic schedule are normal.)
105 switch (pdev->device) {
106 case 0x003c: /* MCP04 */
107 case 0x005b: /* CK804 */
108 case 0x00d8: /* CK8 */
109 case 0x00e8: /* CK8S */
110 if (pci_set_consistent_dma_mask(pdev,
112 ehci_warn(ehci, "can't enable NVidia "
113 "workaround for >2GB RAM\n");
119 /* cache this readonly data; minimize chip reads */
120 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
122 retval = ehci_halt(ehci);
126 /* data structure init */
127 retval = ehci_init(hcd);
131 switch (pdev->vendor) {
132 case PCI_VENDOR_ID_TDI:
133 if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
138 case PCI_VENDOR_ID_AMD:
139 /* AMD8111 EHCI doesn't work, according to AMD errata */
140 if (pdev->device == 0x7463) {
141 ehci_info(ehci, "ignoring AMD8111 (errata)\n");
146 case PCI_VENDOR_ID_NVIDIA:
147 switch (pdev->device) {
148 /* Some NForce2 chips have problems with selective suspend;
149 * fixed in newer silicon.
152 if (pdev->revision < 0xa4)
153 ehci->no_selective_suspend = 1;
157 case PCI_VENDOR_ID_VIA:
158 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
161 /* The VT6212 defaults to a 1 usec EHCI sleep time which
162 * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
163 * that sleep time use the conventional 10 usec.
165 pci_read_config_byte(pdev, 0x4b, &tmp);
168 pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
171 case PCI_VENDOR_ID_ATI:
172 /* SB600 and old version of SB700 have a bug in EHCI controller,
173 * which causes usb devices lose response in some cases.
175 if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
176 p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
177 PCI_DEVICE_ID_ATI_SBX00_SMBUS,
181 rev = p_smbus->revision;
182 if ((pdev->device == 0x4386) || (rev == 0x3a)
185 ehci_info(ehci, "applying AMD SB600/SB700 USB "
186 "freeze workaround\n");
187 pci_read_config_byte(pdev, 0x53, &tmp);
188 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
190 pci_dev_put(p_smbus);
197 /* at least the Genesys GL880S needs fixup here */
198 temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
200 if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
201 ehci_dbg(ehci, "bogus port configuration: "
202 "cc=%d x pcc=%d < ports=%d\n",
203 HCS_N_CC(ehci->hcs_params),
204 HCS_N_PCC(ehci->hcs_params),
205 HCS_N_PORTS(ehci->hcs_params));
207 switch (pdev->vendor) {
208 case 0x17a0: /* GENESYS */
209 /* GL880S: should be PORTS=2 */
210 temp |= (ehci->hcs_params & ~0xf);
211 ehci->hcs_params = temp;
213 case PCI_VENDOR_ID_NVIDIA:
214 /* NF4: should be PCC=10 */
219 /* Serial Bus Release Number is at PCI 0x60 offset */
220 pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
222 /* Keep this around for a while just in case some EHCI
223 * implementation uses legacy PCI PM support. This test
224 * can be removed on 17 Dec 2009 if the dev_warn() hasn't
225 * been triggered by then.
227 if (!device_can_wakeup(&pdev->dev)) {
230 pci_read_config_word(pdev, 0x62, &port_wake);
231 if (port_wake & 0x0001) {
232 dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
233 device_set_wakeup_capable(&pdev->dev, 1);
237 #ifdef CONFIG_USB_SUSPEND
238 /* REVISIT: the controller works fine for wakeup iff the root hub
239 * itself is "globally" suspended, but usbcore currently doesn't
240 * understand such things.
242 * System suspend currently expects to be able to suspend the entire
243 * device tree, device-at-a-time. If we failed selective suspend
244 * reports, system suspend would fail; so the root hub code must claim
245 * success. That's lying to usbcore, and it matters for for runtime
246 * PM scenarios with selective suspend and remote wakeup...
248 if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
249 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
252 ehci_port_power(ehci, 1);
253 retval = ehci_pci_reinit(ehci, pdev);
258 /*-------------------------------------------------------------------------*/
262 /* suspend/resume, section 4.3 */
264 /* These routines rely on the PCI bus glue
265 * to handle powerdown and wakeup, and currently also on
266 * transceivers that don't need any software attention to set up
267 * the right sort of wakeup.
268 * Also they depend on separate root hub suspend/resume.
271 static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
273 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
277 if (time_before(jiffies, ehci->next_statechange))
280 /* Root hub was already suspended. Disable irq emission and
281 * mark HW unaccessible, bail out if RH has been resumed. Use
282 * the spinlock to properly synchronize with possible pending
283 * RH suspend or resume activity.
285 * This is still racy as hcd->state is manipulated outside of
286 * any locks =P But that will be a different fix.
288 spin_lock_irqsave (&ehci->lock, flags);
289 if (hcd->state != HC_STATE_SUSPENDED) {
293 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
294 (void)ehci_readl(ehci, &ehci->regs->intr_enable);
296 /* make sure snapshot being resumed re-enumerates everything */
297 if (message.event == PM_EVENT_PRETHAW) {
302 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
304 spin_unlock_irqrestore (&ehci->lock, flags);
306 // could save FLADJ in case of Vaux power loss
307 // ... we'd only use it to handle clock skew
312 static int ehci_pci_resume(struct usb_hcd *hcd)
314 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
315 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
317 // maybe restore FLADJ
319 if (time_before(jiffies, ehci->next_statechange))
322 /* Mark hardware accessible again as we are out of D3 state by now */
323 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
325 /* If CF is still set, we maintained PCI Vaux power.
326 * Just undo the effect of ehci_pci_suspend().
328 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
329 int mask = INTR_MASK;
331 if (!hcd->self.root_hub->do_remote_wakeup)
333 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
334 ehci_readl(ehci, &ehci->regs->intr_enable);
338 ehci_dbg(ehci, "lost power, restarting\n");
339 usb_root_hub_lost_power(hcd->self.root_hub);
341 /* Else reset, to cope with power loss or flush-to-storage
342 * style "resume" having let BIOS kick in during reboot.
344 (void) ehci_halt(ehci);
345 (void) ehci_reset(ehci);
346 (void) ehci_pci_reinit(ehci, pdev);
348 /* emptying the schedule aborts any urbs */
349 spin_lock_irq(&ehci->lock);
351 end_unlink_async(ehci);
353 spin_unlock_irq(&ehci->lock);
355 ehci_writel(ehci, ehci->command, &ehci->regs->command);
356 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
357 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
359 /* here we "know" root ports should always stay powered */
360 ehci_port_power(ehci, 1);
362 hcd->state = HC_STATE_SUSPENDED;
367 static const struct hc_driver ehci_pci_hc_driver = {
368 .description = hcd_name,
369 .product_desc = "EHCI Host Controller",
370 .hcd_priv_size = sizeof(struct ehci_hcd),
373 * generic hardware linkage
376 .flags = HCD_MEMORY | HCD_USB2,
379 * basic lifecycle operations
381 .reset = ehci_pci_setup,
384 .pci_suspend = ehci_pci_suspend,
385 .pci_resume = ehci_pci_resume,
388 .shutdown = ehci_shutdown,
391 * managing i/o requests and associated device resources
393 .urb_enqueue = ehci_urb_enqueue,
394 .urb_dequeue = ehci_urb_dequeue,
395 .endpoint_disable = ehci_endpoint_disable,
400 .get_frame_number = ehci_get_frame,
405 .hub_status_data = ehci_hub_status_data,
406 .hub_control = ehci_hub_control,
407 .bus_suspend = ehci_bus_suspend,
408 .bus_resume = ehci_bus_resume,
409 .relinquish_port = ehci_relinquish_port,
410 .port_handed_over = ehci_port_handed_over,
413 /*-------------------------------------------------------------------------*/
415 /* PCI driver selection metadata; PCI hotplugging uses this */
416 static const struct pci_device_id pci_ids [] = { {
417 /* handle any USB 2.0 EHCI controller */
418 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
419 .driver_data = (unsigned long) &ehci_pci_hc_driver,
421 { /* end: all zeroes */ }
423 MODULE_DEVICE_TABLE(pci, pci_ids);
425 /* pci driver glue; this is a "new style" PCI driver module */
426 static struct pci_driver ehci_pci_driver = {
427 .name = (char *) hcd_name,
430 .probe = usb_hcd_pci_probe,
431 .remove = usb_hcd_pci_remove,
434 .suspend = usb_hcd_pci_suspend,
435 .resume = usb_hcd_pci_resume,
437 .shutdown = usb_hcd_pci_shutdown,