2
* UHCI HCD (Host Controller Driver) PCI Bus Glue.
4
* Extracted from uhci-hcd.c:
5
* Maintainer: Alan Stern <stern@rowland.harvard.edu>
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
20
#include "pci-quirks.h"
23
* Make sure the controller is completely inactive, unable to
24
* generate interrupts or do DMA.
26
static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
28
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
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.
35
* Returns: 1 if the controller was reset, 0 otherwise.
37
static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
39
return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
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.
47
static void uhci_pci_configure_hc(struct uhci_hcd *uhci)
49
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
52
pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
54
/* Disable platform-specific non-PME# wakeup */
55
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
56
pci_write_config_byte(pdev, USBRES_INTEL, 0);
59
static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
63
switch (to_pci_dev(uhci_dev(uhci))->vendor) {
67
case PCI_VENDOR_ID_GENESYS:
68
/* Genesys Logic's GL880S controllers don't generate
69
* resume-detect interrupts.
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.
81
for (port = 0; port < uhci->rh_numports; ++port) {
82
if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
91
static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)
95
static const char bad_Asus_board[] = "A7V8X";
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.
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) &
113
static int uhci_pci_init(struct usb_hcd *hcd)
115
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
117
uhci->io_addr = (unsigned long) hcd->rsrc_start;
119
uhci->rh_numports = uhci_count_ports(hcd);
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.)
125
if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
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;
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;
142
/* Kick BIOS off this hardware and reset if the controller
143
* isn't already safely quiescent.
145
check_and_reset_hc(uhci);
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.
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.
156
static void uhci_shutdown(struct pci_dev *pdev)
158
struct usb_hcd *hcd = pci_get_drvdata(pdev);
160
uhci_hc_died(hcd_to_uhci(hcd));
165
static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
167
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
168
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
171
dev_dbg(uhci_dev(uhci), "%s\n", __func__);
173
spin_lock_irq(&uhci->lock);
174
if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
175
goto done_okay; /* Already suspended or dead */
177
if (uhci->rh_state > UHCI_RH_SUSPENDED) {
178
dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
183
/* All PCI host controllers are required to disable IRQ generation
184
* at the source, so we must turn off PIRQ.
186
pci_write_config_word(pdev, USBLEGSUP, 0);
187
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
189
/* Enable platform-specific non-PME# wakeup */
191
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
192
pci_write_config_byte(pdev, USBRES_INTEL,
193
USBPORT1EN | USBPORT2EN);
197
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
199
spin_unlock_irq(&uhci->lock);
203
static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
205
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
207
dev_dbg(uhci_dev(uhci), "%s\n", __func__);
209
/* Since we aren't in D3 any more, it's safe to set this flag
210
* even if the controller was dead.
212
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
214
spin_lock_irq(&uhci->lock);
216
/* Make sure resume from hibernation re-enumerates everything */
218
uhci->reset_hc(uhci);
222
/* The firmware may have changed the controller settings during
223
* a system wakeup. Check it and reconfigure to avoid problems.
226
check_and_reset_hc(uhci);
230
/* Tell the core if the controller had to be reset */
231
if (uhci->rh_state == UHCI_RH_RESET)
232
usb_root_hub_lost_power(hcd->self.root_hub);
234
spin_unlock_irq(&uhci->lock);
236
/* If interrupts don't work and remote wakeup is enabled then
237
* the suspended root hub needs to be polled.
239
if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
240
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
242
/* Does the root hub have a port wakeup pending? */
243
usb_hcd_poll_rh_status(hcd);
249
static const struct hc_driver uhci_driver = {
250
.description = hcd_name,
251
.product_desc = "UHCI Host Controller",
252
.hcd_priv_size = sizeof(struct uhci_hcd),
254
/* Generic hardware linkage */
258
/* Basic lifecycle operations */
259
.reset = uhci_pci_init,
262
.pci_suspend = uhci_pci_suspend,
263
.pci_resume = uhci_pci_resume,
264
.bus_suspend = uhci_rh_suspend,
265
.bus_resume = uhci_rh_resume,
269
.urb_enqueue = uhci_urb_enqueue,
270
.urb_dequeue = uhci_urb_dequeue,
272
.endpoint_disable = uhci_hcd_endpoint_disable,
273
.get_frame_number = uhci_hcd_get_frame_number,
275
.hub_status_data = uhci_hub_status_data,
276
.hub_control = uhci_hub_control,
279
static DEFINE_PCI_DEVICE_TABLE(uhci_pci_ids) = { {
280
/* handle any USB UHCI controller */
281
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
282
.driver_data = (unsigned long) &uhci_driver,
283
}, { /* end: all zeroes */ }
286
MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
288
static struct pci_driver uhci_pci_driver = {
289
.name = (char *)hcd_name,
290
.id_table = uhci_pci_ids,
292
.probe = usb_hcd_pci_probe,
293
.remove = usb_hcd_pci_remove,
294
.shutdown = uhci_shutdown,
296
#ifdef CONFIG_PM_SLEEP
298
.pm = &usb_hcd_pci_pm_ops