blob: 940304c33224574439cea18d83f24b6bc763ba10 [file] [log] [blame]
Jan Anderssonc31a65f2011-05-06 12:00:15 +02001/*
2 * UHCI HCD (Host Controller Driver) PCI Bus Glue.
3 *
4 * Extracted from uhci-hcd.c:
5 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
6 *
7 * (C) Copyright 1999 Linus Torvalds
8 * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
9 * (C) Copyright 1999 Randy Dunlap
10 * (C) Copyright 1999 Georg Acher, acher@in.tum.de
11 * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
12 * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
13 * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
14 * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
15 * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
16 * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
17 * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
18 */
19
20#include "pci-quirks.h"
21
22/*
23 * Make sure the controller is completely inactive, unable to
24 * generate interrupts or do DMA.
25 */
26static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
27{
28 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
29}
30
31/*
32 * Initialize a controller that was newly discovered or has just been
33 * resumed. In either case we can't be sure of its previous state.
34 *
35 * Returns: 1 if the controller was reset, 0 otherwise.
36 */
37static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
38{
39 return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
40 uhci->io_addr);
41}
42
43/*
44 * Store the basic register settings needed by the controller.
45 * This function is called at the end of configure_hc in uhci-hcd.c.
46 */
47static void uhci_pci_configure_hc(struct uhci_hcd *uhci)
48{
49 struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
50
51 /* Enable PIRQ */
52 pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
53
54 /* Disable platform-specific non-PME# wakeup */
55 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
56 pci_write_config_byte(pdev, USBRES_INTEL, 0);
57}
58
59static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
60{
61 int port;
62
63 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
64 default:
65 break;
66
67 case PCI_VENDOR_ID_GENESYS:
68 /* Genesys Logic's GL880S controllers don't generate
69 * resume-detect interrupts.
70 */
71 return 1;
72
73 case PCI_VENDOR_ID_INTEL:
74 /* Some of Intel's USB controllers have a bug that causes
75 * resume-detect interrupts if any port has an over-current
76 * condition. To make matters worse, some motherboards
77 * hardwire unused USB ports' over-current inputs active!
78 * To prevent problems, we will not enable resume-detect
79 * interrupts if any ports are OC.
80 */
81 for (port = 0; port < uhci->rh_numports; ++port) {
82 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
83 USBPORTSC_OC)
84 return 1;
85 }
86 break;
87 }
88 return 0;
89}
90
91static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)
92{
93 int port;
94 const char *sys_info;
95 static const char bad_Asus_board[] = "A7V8X";
96
97 /* One of Asus's motherboards has a bug which causes it to
98 * wake up immediately from suspend-to-RAM if any of the ports
99 * are connected. In such cases we will not set EGSM.
100 */
101 sys_info = dmi_get_system_info(DMI_BOARD_NAME);
102 if (sys_info && !strcmp(sys_info, bad_Asus_board)) {
103 for (port = 0; port < uhci->rh_numports; ++port) {
104 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
105 USBPORTSC_CCS)
106 return 1;
107 }
108 }
109
110 return 0;
111}
112
113static int uhci_pci_init(struct usb_hcd *hcd)
114{
115 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
116
117 uhci->io_addr = (unsigned long) hcd->rsrc_start;
118
119 uhci->rh_numports = uhci_count_ports(hcd);
120
121 /* Intel controllers report the OverCurrent bit active on.
122 * VIA controllers report it active off, so we'll adjust the
123 * bit value. (It's not standardized in the UHCI spec.)
124 */
125 if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
126 uhci->oc_low = 1;
127
128 /* HP's server management chip requires a longer port reset delay. */
129 if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
130 uhci->wait_for_hp = 1;
131
132 /* Set up pointers to PCI-specific functions */
133 uhci->reset_hc = uhci_pci_reset_hc;
134 uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;
135 uhci->configure_hc = uhci_pci_configure_hc;
136 uhci->resume_detect_interrupts_are_broken =
137 uhci_pci_resume_detect_interrupts_are_broken;
138 uhci->global_suspend_mode_is_broken =
139 uhci_pci_global_suspend_mode_is_broken;
140
141
142 /* Kick BIOS off this hardware and reset if the controller
143 * isn't already safely quiescent.
144 */
145 check_and_reset_hc(uhci);
146 return 0;
147}
148
149/* Make sure the controller is quiescent and that we're not using it
150 * any more. This is mainly for the benefit of programs which, like kexec,
151 * expect the hardware to be idle: not doing DMA or generating IRQs.
152 *
153 * This routine may be called in a damaged or failing kernel. Hence we
154 * do not acquire the spinlock before shutting down the controller.
155 */
156static void uhci_shutdown(struct pci_dev *pdev)
157{
158 struct usb_hcd *hcd = pci_get_drvdata(pdev);
159
160 uhci_hc_died(hcd_to_uhci(hcd));
161}
162
163#ifdef CONFIG_PM
164
Alan Stern1c124c92013-10-18 11:19:18 -0400165static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated);
166
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200167static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
168{
169 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
170 struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
171 int rc = 0;
172
173 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
174
175 spin_lock_irq(&uhci->lock);
176 if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
177 goto done_okay; /* Already suspended or dead */
178
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200179 /* All PCI host controllers are required to disable IRQ generation
180 * at the source, so we must turn off PIRQ.
181 */
182 pci_write_config_word(pdev, USBLEGSUP, 0);
183 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
184
185 /* Enable platform-specific non-PME# wakeup */
186 if (do_wakeup) {
187 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
188 pci_write_config_byte(pdev, USBRES_INTEL,
189 USBPORT1EN | USBPORT2EN);
190 }
191
192done_okay:
193 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200194 spin_unlock_irq(&uhci->lock);
Alan Stern1c124c92013-10-18 11:19:18 -0400195
196 synchronize_irq(hcd->irq);
197
198 /* Check for race with a wakeup request */
199 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
200 uhci_pci_resume(hcd, false);
201 rc = -EBUSY;
202 }
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200203 return rc;
204}
205
206static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
207{
208 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
209
210 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
211
212 /* Since we aren't in D3 any more, it's safe to set this flag
213 * even if the controller was dead.
214 */
215 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
216
217 spin_lock_irq(&uhci->lock);
218
219 /* Make sure resume from hibernation re-enumerates everything */
220 if (hibernated) {
221 uhci->reset_hc(uhci);
222 finish_reset(uhci);
223 }
224
225 /* The firmware may have changed the controller settings during
226 * a system wakeup. Check it and reconfigure to avoid problems.
227 */
228 else {
229 check_and_reset_hc(uhci);
230 }
231 configure_hc(uhci);
232
233 /* Tell the core if the controller had to be reset */
234 if (uhci->rh_state == UHCI_RH_RESET)
235 usb_root_hub_lost_power(hcd->self.root_hub);
236
237 spin_unlock_irq(&uhci->lock);
238
239 /* If interrupts don't work and remote wakeup is enabled then
240 * the suspended root hub needs to be polled.
241 */
242 if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
243 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
244
245 /* Does the root hub have a port wakeup pending? */
246 usb_hcd_poll_rh_status(hcd);
247 return 0;
248}
249
250#endif
251
252static const struct hc_driver uhci_driver = {
253 .description = hcd_name,
254 .product_desc = "UHCI Host Controller",
255 .hcd_priv_size = sizeof(struct uhci_hcd),
256
257 /* Generic hardware linkage */
258 .irq = uhci_irq,
259 .flags = HCD_USB11,
260
261 /* Basic lifecycle operations */
262 .reset = uhci_pci_init,
263 .start = uhci_start,
264#ifdef CONFIG_PM
265 .pci_suspend = uhci_pci_suspend,
266 .pci_resume = uhci_pci_resume,
267 .bus_suspend = uhci_rh_suspend,
268 .bus_resume = uhci_rh_resume,
269#endif
270 .stop = uhci_stop,
271
272 .urb_enqueue = uhci_urb_enqueue,
273 .urb_dequeue = uhci_urb_dequeue,
274
275 .endpoint_disable = uhci_hcd_endpoint_disable,
276 .get_frame_number = uhci_hcd_get_frame_number,
277
278 .hub_status_data = uhci_hub_status_data,
279 .hub_control = uhci_hub_control,
280};
281
Jingoo Han2fd3f652013-12-03 08:27:58 +0900282static const struct pci_device_id uhci_pci_ids[] = { {
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200283 /* handle any USB UHCI controller */
284 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
285 .driver_data = (unsigned long) &uhci_driver,
286 }, { /* end: all zeroes */ }
287};
288
289MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
290
291static struct pci_driver uhci_pci_driver = {
292 .name = (char *)hcd_name,
293 .id_table = uhci_pci_ids,
294
295 .probe = usb_hcd_pci_probe,
296 .remove = usb_hcd_pci_remove,
297 .shutdown = uhci_shutdown,
298
Alan Sternf875fdb2013-09-24 15:45:25 -0400299#ifdef CONFIG_PM
Jan Anderssonc31a65f2011-05-06 12:00:15 +0200300 .driver = {
301 .pm = &usb_hcd_pci_pm_ops
302 },
303#endif
304};
Tom Gundersen05c92da2013-09-10 23:30:14 +0200305
306MODULE_SOFTDEP("pre: ehci_pci");