2 * xHCI host controller driver PCI Bus Glue.
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25 #include <linux/module.h>
29 /* Device for a quirk */
30 #define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
31 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000
32 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1400 0x1400
34 #define PCI_VENDOR_ID_ETRON 0x1b6f
35 #define PCI_DEVICE_ID_ASROCK_P67 0x7023
37 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI 0x8c31
38 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
39 #define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI 0x22b5
40 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI 0xa12f
41 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI 0x9d2f
42 #define PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI 0x0aa8
44 static const char hcd_name[] = "xhci_hcd";
46 /* called after powerup, by probe or system-pm "wakeup" */
47 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
50 * TODO: Implement finding debug ports later.
51 * TODO: see if there are any quirks that need to be added to handle
52 * new extended capabilities.
55 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
56 if (!pci_set_mwi(pdev))
57 xhci_dbg(xhci, "MWI active\n");
59 xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
63 static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
65 struct pci_dev *pdev = to_pci_dev(dev);
67 /* Look for vendor-specific quirks */
68 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
69 (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK ||
70 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1400)) {
71 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
72 pdev->revision == 0x0) {
73 xhci->quirks |= XHCI_RESET_EP_QUIRK;
74 xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure"
75 " endpoint cmd after reset endpoint\n");
77 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
78 pdev->revision == 0x4) {
79 xhci->quirks |= XHCI_SLOW_SUSPEND;
81 "QUIRK: Fresco Logic xHC revision %u"
82 "must be suspended extra slowly",
85 /* Fresco Logic confirms: all revisions of this chip do not
86 * support MSI, even though some of them claim to in their PCI
89 xhci->quirks |= XHCI_BROKEN_MSI;
90 xhci_dbg(xhci, "QUIRK: Fresco Logic revision %u "
91 "has broken MSI implementation\n",
93 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
96 if (pdev->vendor == PCI_VENDOR_ID_NEC)
97 xhci->quirks |= XHCI_NEC_HOST;
99 if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96)
100 xhci->quirks |= XHCI_AMD_0x96_HOST;
103 if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
104 xhci->quirks |= XHCI_AMD_PLL_FIX;
106 if (pdev->vendor == PCI_VENDOR_ID_AMD)
107 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
109 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
110 xhci->quirks |= XHCI_INTEL_HOST;
111 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
112 xhci->quirks |= XHCI_AVOID_BEI;
113 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
114 pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
115 xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
116 xhci->limit_active_eps = 64;
117 xhci->quirks |= XHCI_SW_BW_CHECKING;
119 * PPT desktop boards DH77EB and DH77DF will power back on after
120 * a few seconds of being shutdown. The fix for this is to
121 * switch the ports from xHCI to EHCI on shutdown. We can't use
122 * DMI information to find those particular boards (since each
123 * vendor will change the board name), so we have to key off all
126 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
128 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
129 pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI) {
130 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
131 xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
133 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
134 (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
135 pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
136 pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
137 pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI)) {
138 xhci->quirks |= XHCI_PME_STUCK_QUIRK;
140 if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
141 pdev->device == PCI_DEVICE_ID_ASROCK_P67) {
142 xhci->quirks |= XHCI_RESET_ON_RESUME;
143 xhci_dbg(xhci, "QUIRK: Resetting on resume\n");
144 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
146 if (pdev->vendor == PCI_VENDOR_ID_VIA)
147 xhci->quirks |= XHCI_RESET_ON_RESUME;
151 * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
152 * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
154 static void xhci_pme_quirk(struct xhci_hcd *xhci)
159 reg = (void __iomem *) xhci->cap_regs + 0x80a4;
161 writel(val | BIT(28), reg);
165 /* called during probe() after chip reset completes */
166 static int xhci_pci_setup(struct usb_hcd *hcd)
168 struct xhci_hcd *xhci;
169 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
172 retval = xhci_gen_setup(hcd, xhci_pci_quirks);
176 xhci = hcd_to_xhci(hcd);
177 if (!usb_hcd_is_primary_hcd(hcd))
180 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
181 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
183 /* Find any debug ports */
184 retval = xhci_pci_reinit(xhci, pdev);
193 * We need to register our own PCI probe function (instead of the USB core's
194 * function) in order to create a second roothub under xHCI.
196 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
199 struct xhci_hcd *xhci;
200 struct hc_driver *driver;
203 driver = (struct hc_driver *)id->driver_data;
204 /* Register the USB 2.0 roothub.
205 * FIXME: USB core must know to register the USB 2.0 roothub first.
206 * This is sort of silly, because we could just set the HCD driver flags
207 * to say USB 2.0, but I'm not sure what the implications would be in
208 * the other parts of the HCD code.
210 retval = usb_hcd_pci_probe(dev, id);
215 /* USB 2.0 roothub is stored in the PCI device now. */
216 hcd = dev_get_drvdata(&dev->dev);
217 xhci = hcd_to_xhci(hcd);
218 xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
220 if (!xhci->shared_hcd) {
222 goto dealloc_usb2_hcd;
225 /* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset)
226 * is called by usb_add_hcd().
228 *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
230 retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
234 /* Roothub already marked as USB 3.0 speed */
238 usb_put_hcd(xhci->shared_hcd);
240 usb_hcd_pci_remove(dev);
244 static void xhci_pci_remove(struct pci_dev *dev)
246 struct xhci_hcd *xhci;
248 xhci = hcd_to_xhci(pci_get_drvdata(dev));
249 if (xhci->shared_hcd) {
250 usb_remove_hcd(xhci->shared_hcd);
251 usb_put_hcd(xhci->shared_hcd);
253 usb_hcd_pci_remove(dev);
255 /* Workaround for spurious wakeups at shutdown with HSW */
256 if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
257 pci_set_power_state(dev, PCI_D3hot);
263 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
265 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
268 if (hcd->state != HC_STATE_SUSPENDED ||
269 xhci->shared_hcd->state != HC_STATE_SUSPENDED)
272 if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
273 xhci_pme_quirk(xhci);
275 retval = xhci_suspend(xhci, do_wakeup);
280 static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
282 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
283 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
286 /* The BIOS on systems with the Intel Panther Point chipset may or may
287 * not support xHCI natively. That means that during system resume, it
288 * may switch the ports back to EHCI so that users can use their
289 * keyboard to select a kernel from GRUB after resume from hibernate.
291 * The BIOS is supposed to remember whether the OS had xHCI ports
292 * enabled before resume, and switch the ports back to xHCI when the
293 * BIOS/OS semaphore is written, but we all know we can't trust BIOS
296 * Unconditionally switch the ports back to xHCI after a system resume.
297 * We can't tell whether the EHCI or xHCI controller will be resumed
298 * first, so we have to do the port switchover in both drivers. Writing
299 * a '1' to the port switchover registers should have no effect if the
300 * port was already switched over.
302 if (usb_is_intel_switchable_xhci(pdev))
303 usb_enable_xhci_ports(pdev);
305 if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
306 xhci_pme_quirk(xhci);
308 retval = xhci_resume(xhci, hibernated);
311 #endif /* CONFIG_PM */
313 static const struct hc_driver xhci_pci_hc_driver = {
314 .description = hcd_name,
315 .product_desc = "xHCI Host Controller",
316 .hcd_priv_size = sizeof(struct xhci_hcd *),
319 * generic hardware linkage
322 .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
325 * basic lifecycle operations
327 .reset = xhci_pci_setup,
330 .pci_suspend = xhci_pci_suspend,
331 .pci_resume = xhci_pci_resume,
334 .shutdown = xhci_shutdown,
337 * managing i/o requests and associated device resources
339 .urb_enqueue = xhci_urb_enqueue,
340 .urb_dequeue = xhci_urb_dequeue,
341 .alloc_dev = xhci_alloc_dev,
342 .free_dev = xhci_free_dev,
343 .alloc_streams = xhci_alloc_streams,
344 .free_streams = xhci_free_streams,
345 .add_endpoint = xhci_add_endpoint,
346 .drop_endpoint = xhci_drop_endpoint,
347 .endpoint_reset = xhci_endpoint_reset,
348 .check_bandwidth = xhci_check_bandwidth,
349 .reset_bandwidth = xhci_reset_bandwidth,
350 .address_device = xhci_address_device,
351 .update_hub_device = xhci_update_hub_device,
352 .reset_device = xhci_discover_or_reset_device,
357 .get_frame_number = xhci_get_frame,
359 /* Root hub support */
360 .hub_control = xhci_hub_control,
361 .hub_status_data = xhci_hub_status_data,
362 .bus_suspend = xhci_bus_suspend,
363 .bus_resume = xhci_bus_resume,
365 * call back when device connected and addressed
367 .update_device = xhci_update_device,
368 .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm,
371 /*-------------------------------------------------------------------------*/
373 /* PCI driver selection metadata; PCI hotplugging uses this */
374 static const struct pci_device_id pci_ids[] = { {
375 /* handle any USB 3.0 xHCI controller */
376 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
377 .driver_data = (unsigned long) &xhci_pci_hc_driver,
379 { /* end: all zeroes */ }
381 MODULE_DEVICE_TABLE(pci, pci_ids);
383 /* pci driver glue; this is a "new style" PCI driver module */
384 static struct pci_driver xhci_pci_driver = {
385 .name = (char *) hcd_name,
388 .probe = xhci_pci_probe,
389 .remove = xhci_pci_remove,
390 /* suspend and resume implemented later */
392 .shutdown = usb_hcd_pci_shutdown,
395 .pm = &usb_hcd_pci_pm_ops
400 int __init xhci_register_pci(void)
402 return pci_register_driver(&xhci_pci_driver);
405 void __exit xhci_unregister_pci(void)
407 pci_unregister_driver(&xhci_pci_driver);