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authorJan Andersson <jan@gaisler.com>2011-05-06 06:00:15 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-06 21:24:00 -0400
commitc31a65f869f7b8a7039007411c76d7b6f9a63323 (patch)
treea22bc058d1b343e8ac0734c905465030166dc821 /drivers/usb/host
parente4d235d800c8d75750a46331298e3473c10651b2 (diff)
USB: UHCI: Move PCI specific functions to uhci-pci.c
This patch is part of a series that extend the UHCI HCD to support non-PCI controllers. This patch moves PCI specific functions to uhci-pci.c and includes this file in uhci-hcd.c. It also renames the function uhci_init to uhci_pci_init. uhci_init/uhci_pci_init is modified so that the port-detection logic is kept in a new separate function uhci_count_ports() in uhci-hcd.c. Signed-off-by: Jan Andersson <jan@gaisler.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/uhci-hcd.c326
-rw-r--r--drivers/usb/host/uhci-pci.c301
2 files changed, 333 insertions, 294 deletions
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 348174fdfaee..3d2a10563be8 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -48,7 +48,6 @@
48#include <asm/system.h> 48#include <asm/system.h>
49 49
50#include "uhci-hcd.h" 50#include "uhci-hcd.h"
51#include "pci-quirks.h"
52 51
53/* 52/*
54 * Version Information 53 * Version Information
@@ -143,15 +142,6 @@ static void finish_reset(struct uhci_hcd *uhci)
143} 142}
144 143
145/* 144/*
146 * Make sure the controller is completely inactive, unable to
147 * generate interrupts or do DMA.
148 */
149static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
150{
151 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
152}
153
154/*
155 * Last rites for a defunct/nonfunctional controller 145 * Last rites for a defunct/nonfunctional controller
156 * or one we don't want to use any more. 146 * or one we don't want to use any more.
157 */ 147 */
@@ -167,18 +157,6 @@ static void uhci_hc_died(struct uhci_hcd *uhci)
167} 157}
168 158
169/* 159/*
170 * Initialize a controller that was newly discovered or has just been
171 * resumed. In either case we can't be sure of its previous state.
172 *
173 * Returns: 1 if the controller was reset, 0 otherwise.
174 */
175static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
176{
177 return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
178 uhci->io_addr);
179}
180
181/*
182 * Initialize a controller that was newly discovered or has lost power 160 * Initialize a controller that was newly discovered or has lost power
183 * or otherwise been reset while it was suspended. In none of these cases 161 * or otherwise been reset while it was suspended. In none of these cases
184 * can we be sure of its previous state. 162 * can we be sure of its previous state.
@@ -189,18 +167,6 @@ static void check_and_reset_hc(struct uhci_hcd *uhci)
189 finish_reset(uhci); 167 finish_reset(uhci);
190} 168}
191 169
192static void uhci_pci_configure_hc(struct uhci_hcd *uhci)
193{
194 struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
195
196 /* Enable PIRQ */
197 pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
198
199 /* Disable platform-specific non-PME# wakeup */
200 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
201 pci_write_config_byte(pdev, USBRES_INTEL, 0);
202}
203
204/* 170/*
205 * Store the basic register settings needed by the controller. 171 * Store the basic register settings needed by the controller.
206 */ 172 */
@@ -221,38 +187,6 @@ static void configure_hc(struct uhci_hcd *uhci)
221 uhci->configure_hc(uhci); 187 uhci->configure_hc(uhci);
222} 188}
223 189
224static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
225{
226 int port;
227
228 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
229 default:
230 break;
231
232 case PCI_VENDOR_ID_GENESYS:
233 /* Genesys Logic's GL880S controllers don't generate
234 * resume-detect interrupts.
235 */
236 return 1;
237
238 case PCI_VENDOR_ID_INTEL:
239 /* Some of Intel's USB controllers have a bug that causes
240 * resume-detect interrupts if any port has an over-current
241 * condition. To make matters worse, some motherboards
242 * hardwire unused USB ports' over-current inputs active!
243 * To prevent problems, we will not enable resume-detect
244 * interrupts if any ports are OC.
245 */
246 for (port = 0; port < uhci->rh_numports; ++port) {
247 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
248 USBPORTSC_OC)
249 return 1;
250 }
251 break;
252 }
253 return 0;
254}
255
256static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci) 190static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
257{ 191{
258 /* If we have to ignore overcurrent events then almost by definition 192 /* If we have to ignore overcurrent events then almost by definition
@@ -264,28 +198,6 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
264 uhci->resume_detect_interrupts_are_broken(uhci) : 0; 198 uhci->resume_detect_interrupts_are_broken(uhci) : 0;
265} 199}
266 200
267static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)
268{
269 int port;
270 const char *sys_info;
271 static const char bad_Asus_board[] = "A7V8X";
272
273 /* One of Asus's motherboards has a bug which causes it to
274 * wake up immediately from suspend-to-RAM if any of the ports
275 * are connected. In such cases we will not set EGSM.
276 */
277 sys_info = dmi_get_system_info(DMI_BOARD_NAME);
278 if (sys_info && !strcmp(sys_info, bad_Asus_board)) {
279 for (port = 0; port < uhci->rh_numports; ++port) {
280 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
281 USBPORTSC_CCS)
282 return 1;
283 }
284 }
285
286 return 0;
287}
288
289static int global_suspend_mode_is_broken(struct uhci_hcd *uhci) 201static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
290{ 202{
291 return uhci->global_suspend_mode_is_broken ? 203 return uhci->global_suspend_mode_is_broken ?
@@ -551,82 +463,6 @@ static void release_uhci(struct uhci_hcd *uhci)
551 uhci->frame, uhci->frame_dma_handle); 463 uhci->frame, uhci->frame_dma_handle);
552} 464}
553 465
554static int uhci_init(struct usb_hcd *hcd)
555{
556 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
557 unsigned io_size = (unsigned) hcd->rsrc_len;
558 int port;
559
560 uhci->io_addr = (unsigned long) hcd->rsrc_start;
561
562 /* The UHCI spec says devices must have 2 ports, and goes on to say
563 * they may have more but gives no way to determine how many there
564 * are. However according to the UHCI spec, Bit 7 of the port
565 * status and control register is always set to 1. So we try to
566 * use this to our advantage. Another common failure mode when
567 * a nonexistent register is addressed is to return all ones, so
568 * we test for that also.
569 */
570 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
571 unsigned int portstatus;
572
573 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
574 if (!(portstatus & 0x0080) || portstatus == 0xffff)
575 break;
576 }
577 if (debug)
578 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
579
580 /* Anything greater than 7 is weird so we'll ignore it. */
581 if (port > UHCI_RH_MAXCHILD) {
582 dev_info(uhci_dev(uhci), "port count misdetected? "
583 "forcing to 2 ports\n");
584 port = 2;
585 }
586 uhci->rh_numports = port;
587
588 /* Intel controllers report the OverCurrent bit active on.
589 * VIA controllers report it active off, so we'll adjust the
590 * bit value. (It's not standardized in the UHCI spec.)
591 */
592 if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
593 uhci->oc_low = 1;
594
595 /* HP's server management chip requires a longer port reset delay. */
596 if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
597 uhci->wait_for_hp = 1;
598
599 /* Set up pointers to PCI-specific functions */
600 uhci->reset_hc = uhci_pci_reset_hc;
601 uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;
602 uhci->configure_hc = uhci_pci_configure_hc;
603 uhci->resume_detect_interrupts_are_broken =
604 uhci_pci_resume_detect_interrupts_are_broken;
605 uhci->global_suspend_mode_is_broken =
606 uhci_pci_global_suspend_mode_is_broken;
607
608
609 /* Kick BIOS off this hardware and reset if the controller
610 * isn't already safely quiescent.
611 */
612 check_and_reset_hc(uhci);
613 return 0;
614}
615
616/* Make sure the controller is quiescent and that we're not using it
617 * any more. This is mainly for the benefit of programs which, like kexec,
618 * expect the hardware to be idle: not doing DMA or generating IRQs.
619 *
620 * This routine may be called in a damaged or failing kernel. Hence we
621 * do not acquire the spinlock before shutting down the controller.
622 */
623static void uhci_shutdown(struct pci_dev *pdev)
624{
625 struct usb_hcd *hcd = pci_get_drvdata(pdev);
626
627 uhci_hc_died(hcd_to_uhci(hcd));
628}
629
630/* 466/*
631 * Allocate a frame list, and then setup the skeleton 467 * Allocate a frame list, and then setup the skeleton
632 * 468 *
@@ -843,87 +679,6 @@ static int uhci_rh_resume(struct usb_hcd *hcd)
843 return rc; 679 return rc;
844} 680}
845 681
846static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
847{
848 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
849 struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
850 int rc = 0;
851
852 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
853
854 spin_lock_irq(&uhci->lock);
855 if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
856 goto done_okay; /* Already suspended or dead */
857
858 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
859 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
860 rc = -EBUSY;
861 goto done;
862 };
863
864 /* All PCI host controllers are required to disable IRQ generation
865 * at the source, so we must turn off PIRQ.
866 */
867 pci_write_config_word(pdev, USBLEGSUP, 0);
868 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
869
870 /* Enable platform-specific non-PME# wakeup */
871 if (do_wakeup) {
872 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
873 pci_write_config_byte(pdev, USBRES_INTEL,
874 USBPORT1EN | USBPORT2EN);
875 }
876
877done_okay:
878 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
879done:
880 spin_unlock_irq(&uhci->lock);
881 return rc;
882}
883
884static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
885{
886 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
887
888 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
889
890 /* Since we aren't in D3 any more, it's safe to set this flag
891 * even if the controller was dead.
892 */
893 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
894
895 spin_lock_irq(&uhci->lock);
896
897 /* Make sure resume from hibernation re-enumerates everything */
898 if (hibernated) {
899 uhci->reset_hc(uhci);
900 finish_reset(uhci);
901 }
902
903 /* The firmware may have changed the controller settings during
904 * a system wakeup. Check it and reconfigure to avoid problems.
905 */
906 else {
907 check_and_reset_hc(uhci);
908 }
909 configure_hc(uhci);
910
911 /* Tell the core if the controller had to be reset */
912 if (uhci->rh_state == UHCI_RH_RESET)
913 usb_root_hub_lost_power(hcd->self.root_hub);
914
915 spin_unlock_irq(&uhci->lock);
916
917 /* If interrupts don't work and remote wakeup is enabled then
918 * the suspended root hub needs to be polled.
919 */
920 if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
921 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
922
923 /* Does the root hub have a port wakeup pending? */
924 usb_hcd_poll_rh_status(hcd);
925 return 0;
926}
927#endif 682#endif
928 683
929/* Wait until a particular device/endpoint's QH is idle, and free it */ 684/* Wait until a particular device/endpoint's QH is idle, and free it */
@@ -966,62 +721,45 @@ static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
966 return frame_number + delta; 721 return frame_number + delta;
967} 722}
968 723
969static const char hcd_name[] = "uhci_hcd"; 724/* Determines number of ports on controller */
970 725static int uhci_count_ports(struct usb_hcd *hcd)
971static const struct hc_driver uhci_driver = { 726{
972 .description = hcd_name, 727 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
973 .product_desc = "UHCI Host Controller", 728 unsigned io_size = (unsigned) hcd->rsrc_len;
974 .hcd_priv_size = sizeof(struct uhci_hcd), 729 int port;
975
976 /* Generic hardware linkage */
977 .irq = uhci_irq,
978 .flags = HCD_USB11,
979
980 /* Basic lifecycle operations */
981 .reset = uhci_init,
982 .start = uhci_start,
983#ifdef CONFIG_PM
984 .pci_suspend = uhci_pci_suspend,
985 .pci_resume = uhci_pci_resume,
986 .bus_suspend = uhci_rh_suspend,
987 .bus_resume = uhci_rh_resume,
988#endif
989 .stop = uhci_stop,
990
991 .urb_enqueue = uhci_urb_enqueue,
992 .urb_dequeue = uhci_urb_dequeue,
993 730
994 .endpoint_disable = uhci_hcd_endpoint_disable, 731 /* The UHCI spec says devices must have 2 ports, and goes on to say
995 .get_frame_number = uhci_hcd_get_frame_number, 732 * they may have more but gives no way to determine how many there
733 * are. However according to the UHCI spec, Bit 7 of the port
734 * status and control register is always set to 1. So we try to
735 * use this to our advantage. Another common failure mode when
736 * a nonexistent register is addressed is to return all ones, so
737 * we test for that also.
738 */
739 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
740 unsigned int portstatus;
996 741
997 .hub_status_data = uhci_hub_status_data, 742 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
998 .hub_control = uhci_hub_control, 743 if (!(portstatus & 0x0080) || portstatus == 0xffff)
999}; 744 break;
745 }
746 if (debug)
747 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
1000 748
1001static DEFINE_PCI_DEVICE_TABLE(uhci_pci_ids) = { { 749 /* Anything greater than 7 is weird so we'll ignore it. */
1002 /* handle any USB UHCI controller */ 750 if (port > UHCI_RH_MAXCHILD) {
1003 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0), 751 dev_info(uhci_dev(uhci), "port count misdetected? "
1004 .driver_data = (unsigned long) &uhci_driver, 752 "forcing to 2 ports\n");
1005 }, { /* end: all zeroes */ } 753 port = 2;
1006}; 754 }
1007 755
1008MODULE_DEVICE_TABLE(pci, uhci_pci_ids); 756 return port;
757}
1009 758
1010static struct pci_driver uhci_pci_driver = { 759static const char hcd_name[] = "uhci_hcd";
1011 .name = (char *)hcd_name,
1012 .id_table = uhci_pci_ids,
1013 760
1014 .probe = usb_hcd_pci_probe, 761#include "uhci-pci.c"
1015 .remove = usb_hcd_pci_remove,
1016 .shutdown = uhci_shutdown,
1017 762
1018#ifdef CONFIG_PM_SLEEP
1019 .driver = {
1020 .pm = &usb_hcd_pci_pm_ops
1021 },
1022#endif
1023};
1024
1025static int __init uhci_hcd_init(void) 763static int __init uhci_hcd_init(void)
1026{ 764{
1027 int retval = -ENOMEM; 765 int retval = -ENOMEM;
diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c
new file mode 100644
index 000000000000..c300bd2f7d1c
--- /dev/null
+++ b/drivers/usb/host/uhci-pci.c
@@ -0,0 +1,301 @@
1/*
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
165static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
166{
167 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
168 struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
169 int rc = 0;
170
171 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
172
173 spin_lock_irq(&uhci->lock);
174 if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
175 goto done_okay; /* Already suspended or dead */
176
177 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
178 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
179 rc = -EBUSY;
180 goto done;
181 };
182
183 /* All PCI host controllers are required to disable IRQ generation
184 * at the source, so we must turn off PIRQ.
185 */
186 pci_write_config_word(pdev, USBLEGSUP, 0);
187 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
188
189 /* Enable platform-specific non-PME# wakeup */
190 if (do_wakeup) {
191 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
192 pci_write_config_byte(pdev, USBRES_INTEL,
193 USBPORT1EN | USBPORT2EN);
194 }
195
196done_okay:
197 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
198done:
199 spin_unlock_irq(&uhci->lock);
200 return rc;
201}
202
203static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
204{
205 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
206
207 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
208
209 /* Since we aren't in D3 any more, it's safe to set this flag
210 * even if the controller was dead.
211 */
212 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
213
214 spin_lock_irq(&uhci->lock);
215
216 /* Make sure resume from hibernation re-enumerates everything */
217 if (hibernated) {
218 uhci->reset_hc(uhci);
219 finish_reset(uhci);
220 }
221
222 /* The firmware may have changed the controller settings during
223 * a system wakeup. Check it and reconfigure to avoid problems.
224 */
225 else {
226 check_and_reset_hc(uhci);
227 }
228 configure_hc(uhci);
229
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);
233
234 spin_unlock_irq(&uhci->lock);
235
236 /* If interrupts don't work and remote wakeup is enabled then
237 * the suspended root hub needs to be polled.
238 */
239 if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
240 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
241
242 /* Does the root hub have a port wakeup pending? */
243 usb_hcd_poll_rh_status(hcd);
244 return 0;
245}
246
247#endif
248
249static const struct hc_driver uhci_driver = {
250 .description = hcd_name,
251 .product_desc = "UHCI Host Controller",
252 .hcd_priv_size = sizeof(struct uhci_hcd),
253
254 /* Generic hardware linkage */
255 .irq = uhci_irq,
256 .flags = HCD_USB11,
257
258 /* Basic lifecycle operations */
259 .reset = uhci_pci_init,
260 .start = uhci_start,
261#ifdef CONFIG_PM
262 .pci_suspend = uhci_pci_suspend,
263 .pci_resume = uhci_pci_resume,
264 .bus_suspend = uhci_rh_suspend,
265 .bus_resume = uhci_rh_resume,
266#endif
267 .stop = uhci_stop,
268
269 .urb_enqueue = uhci_urb_enqueue,
270 .urb_dequeue = uhci_urb_dequeue,
271
272 .endpoint_disable = uhci_hcd_endpoint_disable,
273 .get_frame_number = uhci_hcd_get_frame_number,
274
275 .hub_status_data = uhci_hub_status_data,
276 .hub_control = uhci_hub_control,
277};
278
279static 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 */ }
284};
285
286MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
287
288static struct pci_driver uhci_pci_driver = {
289 .name = (char *)hcd_name,
290 .id_table = uhci_pci_ids,
291
292 .probe = usb_hcd_pci_probe,
293 .remove = usb_hcd_pci_remove,
294 .shutdown = uhci_shutdown,
295
296#ifdef CONFIG_PM_SLEEP
297 .driver = {
298 .pm = &usb_hcd_pci_pm_ops
299 },
300#endif
301};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 23:23:31 -0500