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 /* SB700 old version has a bug in EHCI controller,
173 * which causes usb devices lose response in some cases.
175 if (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 ((rev == 0x3a) || (rev == 0x3b)) {
184 pci_read_config_byte(pdev, 0x53, &tmp);
185 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
187 pci_dev_put(p_smbus);
194 /* at least the Genesys GL880S needs fixup here */
195 temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
197 if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
198 ehci_dbg(ehci, "bogus port configuration: "
199 "cc=%d x pcc=%d < ports=%d\n",
200 HCS_N_CC(ehci->hcs_params),
201 HCS_N_PCC(ehci->hcs_params),
202 HCS_N_PORTS(ehci->hcs_params));
204 switch (pdev->vendor) {
205 case 0x17a0: /* GENESYS */
206 /* GL880S: should be PORTS=2 */
207 temp |= (ehci->hcs_params & ~0xf);
208 ehci->hcs_params = temp;
210 case PCI_VENDOR_ID_NVIDIA:
211 /* NF4: should be PCC=10 */
216 /* Serial Bus Release Number is at PCI 0x60 offset */
217 pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
219 /* Workaround current PCI init glitch: wakeup bits aren't
220 * being set from PCI PM capability.
222 if (!device_can_wakeup(&pdev->dev)) {
225 pci_read_config_word(pdev, 0x62, &port_wake);
226 if (port_wake & 0x0001)
227 device_init_wakeup(&pdev->dev, 1);
230 #ifdef CONFIG_USB_SUSPEND
231 /* REVISIT: the controller works fine for wakeup iff the root hub
232 * itself is "globally" suspended, but usbcore currently doesn't
233 * understand such things.
235 * System suspend currently expects to be able to suspend the entire
236 * device tree, device-at-a-time. If we failed selective suspend
237 * reports, system suspend would fail; so the root hub code must claim
238 * success. That's lying to usbcore, and it matters for for runtime
239 * PM scenarios with selective suspend and remote wakeup...
241 if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
242 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
245 ehci_port_power(ehci, 1);
246 retval = ehci_pci_reinit(ehci, pdev);
251 /*-------------------------------------------------------------------------*/
255 /* suspend/resume, section 4.3 */
257 /* These routines rely on the PCI bus glue
258 * to handle powerdown and wakeup, and currently also on
259 * transceivers that don't need any software attention to set up
260 * the right sort of wakeup.
261 * Also they depend on separate root hub suspend/resume.
264 static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
266 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
270 if (time_before(jiffies, ehci->next_statechange))
273 /* Root hub was already suspended. Disable irq emission and
274 * mark HW unaccessible, bail out if RH has been resumed. Use
275 * the spinlock to properly synchronize with possible pending
276 * RH suspend or resume activity.
278 * This is still racy as hcd->state is manipulated outside of
279 * any locks =P But that will be a different fix.
281 spin_lock_irqsave (&ehci->lock, flags);
282 if (hcd->state != HC_STATE_SUSPENDED) {
286 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
287 (void)ehci_readl(ehci, &ehci->regs->intr_enable);
289 /* make sure snapshot being resumed re-enumerates everything */
290 if (message.event == PM_EVENT_PRETHAW) {
295 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
297 spin_unlock_irqrestore (&ehci->lock, flags);
299 // could save FLADJ in case of Vaux power loss
300 // ... we'd only use it to handle clock skew
305 static int ehci_pci_resume(struct usb_hcd *hcd)
307 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
308 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
310 // maybe restore FLADJ
312 if (time_before(jiffies, ehci->next_statechange))
315 /* Mark hardware accessible again as we are out of D3 state by now */
316 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
318 /* If CF is still set, we maintained PCI Vaux power.
319 * Just undo the effect of ehci_pci_suspend().
321 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
322 int mask = INTR_MASK;
324 if (!hcd->self.root_hub->do_remote_wakeup)
326 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
327 ehci_readl(ehci, &ehci->regs->intr_enable);
331 ehci_dbg(ehci, "lost power, restarting\n");
332 usb_root_hub_lost_power(hcd->self.root_hub);
334 /* Else reset, to cope with power loss or flush-to-storage
335 * style "resume" having let BIOS kick in during reboot.
337 (void) ehci_halt(ehci);
338 (void) ehci_reset(ehci);
339 (void) ehci_pci_reinit(ehci, pdev);
341 /* emptying the schedule aborts any urbs */
342 spin_lock_irq(&ehci->lock);
344 end_unlink_async(ehci);
346 spin_unlock_irq(&ehci->lock);
348 ehci_writel(ehci, ehci->command, &ehci->regs->command);
349 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
350 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
352 /* here we "know" root ports should always stay powered */
353 ehci_port_power(ehci, 1);
355 hcd->state = HC_STATE_SUSPENDED;
360 static const struct hc_driver ehci_pci_hc_driver = {
361 .description = hcd_name,
362 .product_desc = "EHCI Host Controller",
363 .hcd_priv_size = sizeof(struct ehci_hcd),
366 * generic hardware linkage
369 .flags = HCD_MEMORY | HCD_USB2,
372 * basic lifecycle operations
374 .reset = ehci_pci_setup,
377 .pci_suspend = ehci_pci_suspend,
378 .pci_resume = ehci_pci_resume,
381 .shutdown = ehci_shutdown,
384 * managing i/o requests and associated device resources
386 .urb_enqueue = ehci_urb_enqueue,
387 .urb_dequeue = ehci_urb_dequeue,
388 .endpoint_disable = ehci_endpoint_disable,
393 .get_frame_number = ehci_get_frame,
398 .hub_status_data = ehci_hub_status_data,
399 .hub_control = ehci_hub_control,
400 .bus_suspend = ehci_bus_suspend,
401 .bus_resume = ehci_bus_resume,
402 .relinquish_port = ehci_relinquish_port,
403 .port_handed_over = ehci_port_handed_over,
406 /*-------------------------------------------------------------------------*/
408 /* PCI driver selection metadata; PCI hotplugging uses this */
409 static const struct pci_device_id pci_ids [] = { {
410 /* handle any USB 2.0 EHCI controller */
411 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
412 .driver_data = (unsigned long) &ehci_pci_hc_driver,
414 { /* end: all zeroes */ }
416 MODULE_DEVICE_TABLE(pci, pci_ids);
418 /* pci driver glue; this is a "new style" PCI driver module */
419 static struct pci_driver ehci_pci_driver = {
420 .name = (char *) hcd_name,
423 .probe = usb_hcd_pci_probe,
424 .remove = usb_hcd_pci_remove,
427 .suspend = usb_hcd_pci_suspend,
428 .resume = usb_hcd_pci_resume,
430 .shutdown = usb_hcd_pci_shutdown,