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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Universal Host Controller Interface driver for USB.
3 *
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
5 *
6 * (C) Copyright 1999 Linus Torvalds
7 * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
8 * (C) Copyright 1999 Randy Dunlap
9 * (C) Copyright 1999 Georg Acher, acher@in.tum.de
10 * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
11 * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
12 * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
13 * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
14 * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
15 * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
Alan Sternc4334722006-05-19 16:34:57 -040016 * (C) Copyright 2004-2006 Alan Stern, stern@rowland.harvard.edu
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 *
18 * Intel documents this fairly well, and as far as I know there
19 * are no royalties or anything like that, but even so there are
20 * people who decided that they want to do the same thing in a
21 * completely different way.
22 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 */
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/module.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/init.h>
29#include <linux/delay.h>
30#include <linux/ioport.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/errno.h>
34#include <linux/unistd.h>
35#include <linux/interrupt.h>
36#include <linux/spinlock.h>
37#include <linux/debugfs.h>
38#include <linux/pm.h>
39#include <linux/dmapool.h>
40#include <linux/dma-mapping.h>
41#include <linux/usb.h>
42#include <linux/bitops.h>
Alan Sternb62df452006-10-10 10:54:00 -040043#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#include <asm/uaccess.h>
46#include <asm/io.h>
47#include <asm/irq.h>
48#include <asm/system.h>
49
50#include "../core/hcd.h"
51#include "uhci-hcd.h"
Adrian Bunk75e2df62006-03-25 18:01:53 +010052#include "pci-quirks.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/*
55 * Version Information
56 */
Alan Sterndccf4a42005-12-17 17:58:46 -050057#define DRIVER_VERSION "v3.0"
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \
59Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
60Alan Stern"
61#define DRIVER_DESC "USB Universal Host Controller Interface driver"
62
Alan Stern5f8364b2006-12-05 16:29:55 -050063/* for flakey hardware, ignore overcurrent indicators */
64static int ignore_oc;
65module_param(ignore_oc, bool, S_IRUGO);
66MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications");
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068/*
69 * debug = 0, no debugging messages
Alan Stern687f5f32005-11-30 17:16:19 -050070 * debug = 1, dump failed URBs except for stalls
71 * debug = 2, dump all failed URBs (including stalls)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 * show all queues in /debug/uhci/[pci_addr]
Alan Stern687f5f32005-11-30 17:16:19 -050073 * debug = 3, show all TDs in URBs when dumping
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 */
75#ifdef DEBUG
Alan Stern8d402e12005-12-17 18:03:37 -050076#define DEBUG_CONFIGURED 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070077static int debug = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078module_param(debug, int, S_IRUGO | S_IWUSR);
79MODULE_PARM_DESC(debug, "Debug level");
Alan Stern8d402e12005-12-17 18:03:37 -050080
81#else
82#define DEBUG_CONFIGURED 0
83#define debug 0
84#endif
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086static char *errbuf;
87#define ERRBUF_LEN (32 * 1024)
88
Christoph Lametere18b8902006-12-06 20:33:20 -080089static struct kmem_cache *uhci_up_cachep; /* urb_priv */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Alan Stern6c1b4452005-04-21 16:04:58 -040091static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
92static void wakeup_rh(struct uhci_hcd *uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#include "uhci-debug.c"
96#include "uhci-q.c"
Alan Stern1f09df82005-09-05 13:59:51 -040097#include "uhci-hub.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Alan Sterna8bed8b2005-04-09 17:29:00 -040099/*
Alan Sternbb200f62005-10-03 16:36:29 -0400100 * Finish up a host controller reset and update the recorded state.
Alan Sterna8bed8b2005-04-09 17:29:00 -0400101 */
Alan Sternbb200f62005-10-03 16:36:29 -0400102static void finish_reset(struct uhci_hcd *uhci)
Alan Stern014e73c2005-04-09 17:24:42 -0400103{
Alan Sternc074b412005-04-22 14:39:12 -0400104 int port;
105
Alan Sternc074b412005-04-22 14:39:12 -0400106 /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect
107 * bits in the port status and control registers.
108 * We have to clear them by hand.
109 */
110 for (port = 0; port < uhci->rh_numports; ++port)
111 outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
112
Alan Stern8e326402006-04-04 14:47:44 -0400113 uhci->port_c_suspend = uhci->resuming_ports = 0;
Alan Sternc8f4fe42005-04-09 17:27:32 -0400114 uhci->rh_state = UHCI_RH_RESET;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400115 uhci->is_stopped = UHCI_IS_STOPPED;
116 uhci_to_hcd(uhci)->state = HC_STATE_HALT;
Alan Stern6c1b4452005-04-21 16:04:58 -0400117 uhci_to_hcd(uhci)->poll_rh = 0;
Alan Sterne323de462006-06-05 12:21:30 -0400118
119 uhci->dead = 0; /* Full reset resurrects the controller */
Alan Stern014e73c2005-04-09 17:24:42 -0400120}
121
Alan Sterna8bed8b2005-04-09 17:29:00 -0400122/*
Alan Stern4daaa872005-04-09 17:30:08 -0400123 * Last rites for a defunct/nonfunctional controller
Alan Stern02597d22005-04-28 14:51:27 -0400124 * or one we don't want to use any more.
Alan Stern4daaa872005-04-09 17:30:08 -0400125 */
Alan Sterne323de462006-06-05 12:21:30 -0400126static void uhci_hc_died(struct uhci_hcd *uhci)
Alan Stern4daaa872005-04-09 17:30:08 -0400127{
Alan Sterne323de462006-06-05 12:21:30 -0400128 uhci_get_current_frame_number(uhci);
Alan Sternbb200f62005-10-03 16:36:29 -0400129 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
130 finish_reset(uhci);
Alan Sterne323de462006-06-05 12:21:30 -0400131 uhci->dead = 1;
132
133 /* The current frame may already be partway finished */
134 ++uhci->frame_number;
Alan Stern4daaa872005-04-09 17:30:08 -0400135}
136
137/*
David Brownellbe3cbc52006-06-05 12:16:39 -0400138 * Initialize a controller that was newly discovered or has lost power
139 * or otherwise been reset while it was suspended. In none of these cases
140 * can we be sure of its previous state.
Alan Sterna8bed8b2005-04-09 17:29:00 -0400141 */
142static void check_and_reset_hc(struct uhci_hcd *uhci)
143{
Alan Sternbb200f62005-10-03 16:36:29 -0400144 if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
145 finish_reset(uhci);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400146}
147
148/*
149 * Store the basic register settings needed by the controller.
150 */
151static void configure_hc(struct uhci_hcd *uhci)
152{
153 /* Set the frame length to the default: 1 ms exactly */
154 outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
155
156 /* Store the frame list base address */
Alan Sterna1d59ce2005-09-16 14:22:51 -0400157 outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400158
159 /* Set the current frame number */
Alan Sternc4334722006-05-19 16:34:57 -0400160 outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
161 uhci->io_addr + USBFRNUM);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400162
Alan Sternf37be9b2005-10-17 10:42:06 -0400163 /* Mark controller as not halted before we enable interrupts */
164 uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400165 mb();
166
167 /* Enable PIRQ */
168 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
169 USBLEGSUP_DEFAULT);
170}
171
172
Alan Sternc8f4fe42005-04-09 17:27:32 -0400173static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
Alan Stern014e73c2005-04-09 17:24:42 -0400174{
Alan Sternc8f4fe42005-04-09 17:27:32 -0400175 int port;
Alan Stern014e73c2005-04-09 17:24:42 -0400176
Alan Stern5f8364b2006-12-05 16:29:55 -0500177 /* If we have to ignore overcurrent events then almost by definition
178 * we can't depend on resume-detect interrupts. */
179 if (ignore_oc)
180 return 1;
181
Alan Sternc8f4fe42005-04-09 17:27:32 -0400182 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
183 default:
184 break;
Alan Stern014e73c2005-04-09 17:24:42 -0400185
Alan Sternc8f4fe42005-04-09 17:27:32 -0400186 case PCI_VENDOR_ID_GENESYS:
187 /* Genesys Logic's GL880S controllers don't generate
188 * resume-detect interrupts.
189 */
190 return 1;
191
192 case PCI_VENDOR_ID_INTEL:
193 /* Some of Intel's USB controllers have a bug that causes
194 * resume-detect interrupts if any port has an over-current
195 * condition. To make matters worse, some motherboards
196 * hardwire unused USB ports' over-current inputs active!
197 * To prevent problems, we will not enable resume-detect
198 * interrupts if any ports are OC.
199 */
200 for (port = 0; port < uhci->rh_numports; ++port) {
201 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
202 USBPORTSC_OC)
203 return 1;
204 }
205 break;
206 }
207 return 0;
208}
209
Alan Sternb62df452006-10-10 10:54:00 -0400210static int remote_wakeup_is_broken(struct uhci_hcd *uhci)
211{
Alan Sternb62df452006-10-10 10:54:00 -0400212 int port;
Alan Sternc80a70d2006-12-15 16:06:25 -0500213 char *sys_info;
214 static char bad_Asus_board[] = "A7V8X";
Alan Sternb62df452006-10-10 10:54:00 -0400215
216 /* One of Asus's motherboards has a bug which causes it to
217 * wake up immediately from suspend-to-RAM if any of the ports
218 * are connected. In such cases we will not set EGSM.
219 */
Alan Sternc80a70d2006-12-15 16:06:25 -0500220 sys_info = dmi_get_system_info(DMI_BOARD_NAME);
221 if (sys_info && !strcmp(sys_info, bad_Asus_board)) {
Alan Sternb62df452006-10-10 10:54:00 -0400222 for (port = 0; port < uhci->rh_numports; ++port) {
223 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
224 USBPORTSC_CCS)
225 return 1;
226 }
227 }
228
229 return 0;
230}
231
Alan Sterna8bed8b2005-04-09 17:29:00 -0400232static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
Alan Sternc8f4fe42005-04-09 17:27:32 -0400233__releases(uhci->lock)
234__acquires(uhci->lock)
235{
236 int auto_stop;
Alan Sternb62df452006-10-10 10:54:00 -0400237 int int_enable, egsm_enable;
Alan Sternc8f4fe42005-04-09 17:27:32 -0400238
239 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
David Brownellbe3cbc52006-06-05 12:16:39 -0400240 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
241 "%s%s\n", __FUNCTION__,
Alan Sternc8f4fe42005-04-09 17:27:32 -0400242 (auto_stop ? " (auto-stop)" : ""));
243
244 /* If we get a suspend request when we're already auto-stopped
245 * then there's nothing to do.
246 */
247 if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) {
248 uhci->rh_state = new_state;
249 return;
250 }
251
252 /* Enable resume-detect interrupts if they work.
Alan Sternb62df452006-10-10 10:54:00 -0400253 * Then enter Global Suspend mode if _it_ works, still configured.
Alan Sternc8f4fe42005-04-09 17:27:32 -0400254 */
Alan Sternb62df452006-10-10 10:54:00 -0400255 egsm_enable = USBCMD_EGSM;
Alan Stern1f09df82005-09-05 13:59:51 -0400256 uhci->working_RD = 1;
257 int_enable = USBINTR_RESUME;
Alan Sternb62df452006-10-10 10:54:00 -0400258 if (remote_wakeup_is_broken(uhci))
259 egsm_enable = 0;
Alan Stern25c77b32006-12-15 16:08:13 -0500260 if (resume_detect_interrupts_are_broken(uhci) || !egsm_enable ||
261 !device_may_wakeup(
262 &uhci_to_hcd(uhci)->self.root_hub->dev))
Alan Stern1f09df82005-09-05 13:59:51 -0400263 uhci->working_RD = int_enable = 0;
Alan Sternb62df452006-10-10 10:54:00 -0400264
Alan Sternc8f4fe42005-04-09 17:27:32 -0400265 outw(int_enable, uhci->io_addr + USBINTR);
Alan Sternb62df452006-10-10 10:54:00 -0400266 outw(egsm_enable | USBCMD_CF, uhci->io_addr + USBCMD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400267 mb();
Alan Sternc8f4fe42005-04-09 17:27:32 -0400268 udelay(5);
269
270 /* If we're auto-stopping then no devices have been attached
271 * for a while, so there shouldn't be any active URBs and the
272 * controller should stop after a few microseconds. Otherwise
273 * we will give the controller one frame to stop.
274 */
275 if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
276 uhci->rh_state = UHCI_RH_SUSPENDING;
277 spin_unlock_irq(&uhci->lock);
278 msleep(1);
279 spin_lock_irq(&uhci->lock);
Alan Sterne323de462006-06-05 12:21:30 -0400280 if (uhci->dead)
Alan Stern4daaa872005-04-09 17:30:08 -0400281 return;
Alan Sternc8f4fe42005-04-09 17:27:32 -0400282 }
283 if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
David Brownellbe3cbc52006-06-05 12:16:39 -0400284 dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev,
285 "Controller not stopped yet!\n");
Alan Sternc8f4fe42005-04-09 17:27:32 -0400286
Alan Stern014e73c2005-04-09 17:24:42 -0400287 uhci_get_current_frame_number(uhci);
Alan Sternc8f4fe42005-04-09 17:27:32 -0400288
289 uhci->rh_state = new_state;
Alan Stern014e73c2005-04-09 17:24:42 -0400290 uhci->is_stopped = UHCI_IS_STOPPED;
Alan Stern6c1b4452005-04-21 16:04:58 -0400291 uhci_to_hcd(uhci)->poll_rh = !int_enable;
Alan Stern014e73c2005-04-09 17:24:42 -0400292
David Howells7d12e782006-10-05 14:55:46 +0100293 uhci_scan_schedule(uhci);
Alan Stern84afddd2006-05-12 11:35:45 -0400294 uhci_fsbr_off(uhci);
Alan Stern014e73c2005-04-09 17:24:42 -0400295}
296
Alan Sterna8bed8b2005-04-09 17:29:00 -0400297static void start_rh(struct uhci_hcd *uhci)
298{
Alan Sternf37be9b2005-10-17 10:42:06 -0400299 uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400300 uhci->is_stopped = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400301
302 /* Mark it configured and running with a 64-byte max packet.
303 * All interrupts are enabled, even though RESUME won't do anything.
304 */
305 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
306 outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
307 uhci->io_addr + USBINTR);
308 mb();
Alan Stern6c1b4452005-04-21 16:04:58 -0400309 uhci->rh_state = UHCI_RH_RUNNING;
310 uhci_to_hcd(uhci)->poll_rh = 1;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400311}
312
313static void wakeup_rh(struct uhci_hcd *uhci)
Alan Sternc8f4fe42005-04-09 17:27:32 -0400314__releases(uhci->lock)
315__acquires(uhci->lock)
Alan Stern014e73c2005-04-09 17:24:42 -0400316{
David Brownellbe3cbc52006-06-05 12:16:39 -0400317 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
318 "%s%s\n", __FUNCTION__,
Alan Sternc8f4fe42005-04-09 17:27:32 -0400319 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
320 " (auto-start)" : "");
Alan Stern014e73c2005-04-09 17:24:42 -0400321
Alan Sternc8f4fe42005-04-09 17:27:32 -0400322 /* If we are auto-stopped then no devices are attached so there's
323 * no need for wakeup signals. Otherwise we send Global Resume
324 * for 20 ms.
325 */
326 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
327 uhci->rh_state = UHCI_RH_RESUMING;
328 outw(USBCMD_FGR | USBCMD_EGSM | USBCMD_CF,
329 uhci->io_addr + USBCMD);
330 spin_unlock_irq(&uhci->lock);
331 msleep(20);
332 spin_lock_irq(&uhci->lock);
Alan Sterne323de462006-06-05 12:21:30 -0400333 if (uhci->dead)
Alan Stern4daaa872005-04-09 17:30:08 -0400334 return;
Alan Stern014e73c2005-04-09 17:24:42 -0400335
Alan Sternc8f4fe42005-04-09 17:27:32 -0400336 /* End Global Resume and wait for EOP to be sent */
337 outw(USBCMD_CF, uhci->io_addr + USBCMD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400338 mb();
Alan Sternc8f4fe42005-04-09 17:27:32 -0400339 udelay(4);
340 if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
341 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
Alan Stern014e73c2005-04-09 17:24:42 -0400342 }
Alan Sternc8f4fe42005-04-09 17:27:32 -0400343
Alan Sterna8bed8b2005-04-09 17:29:00 -0400344 start_rh(uhci);
Alan Stern014e73c2005-04-09 17:24:42 -0400345
Alan Stern6c1b4452005-04-21 16:04:58 -0400346 /* Restart root hub polling */
347 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
Alan Stern014e73c2005-04-09 17:24:42 -0400348}
349
David Howells7d12e782006-10-05 14:55:46 +0100350static irqreturn_t uhci_irq(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
352 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 unsigned short status;
Alan Stern4daaa872005-04-09 17:30:08 -0400354 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 /*
357 * Read the interrupt status, and write it back to clear the
358 * interrupt cause. Contrary to the UHCI specification, the
359 * "HC Halted" status bit is persistent: it is RO, not R/WC.
360 */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400361 status = inw(uhci->io_addr + USBSTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */
363 return IRQ_NONE;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400364 outw(status, uhci->io_addr + USBSTS); /* Clear it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
367 if (status & USBSTS_HSE)
368 dev_err(uhci_dev(uhci), "host system error, "
369 "PCI problems?\n");
370 if (status & USBSTS_HCPE)
371 dev_err(uhci_dev(uhci), "host controller process "
372 "error, something bad happened!\n");
Alan Stern4daaa872005-04-09 17:30:08 -0400373 if (status & USBSTS_HCH) {
374 spin_lock_irqsave(&uhci->lock, flags);
375 if (uhci->rh_state >= UHCI_RH_RUNNING) {
376 dev_err(uhci_dev(uhci),
377 "host controller halted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 "very bad!\n");
Alan Stern8d402e12005-12-17 18:03:37 -0500379 if (debug > 1 && errbuf) {
380 /* Print the schedule for debugging */
381 uhci_sprint_schedule(uhci,
382 errbuf, ERRBUF_LEN);
383 lprintk(errbuf);
384 }
Alan Sterne323de462006-06-05 12:21:30 -0400385 uhci_hc_died(uhci);
Alan Stern1f09df82005-09-05 13:59:51 -0400386
387 /* Force a callback in case there are
388 * pending unlinks */
389 mod_timer(&hcd->rh_timer, jiffies);
Alan Stern4daaa872005-04-09 17:30:08 -0400390 }
391 spin_unlock_irqrestore(&uhci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 }
393 }
394
395 if (status & USBSTS_RD)
Alan Stern6c1b4452005-04-21 16:04:58 -0400396 usb_hcd_poll_rh_status(hcd);
Alan Stern1f09df82005-09-05 13:59:51 -0400397 else {
398 spin_lock_irqsave(&uhci->lock, flags);
David Howells7d12e782006-10-05 14:55:46 +0100399 uhci_scan_schedule(uhci);
Alan Stern1f09df82005-09-05 13:59:51 -0400400 spin_unlock_irqrestore(&uhci->lock, flags);
401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403 return IRQ_HANDLED;
404}
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406/*
407 * Store the current frame number in uhci->frame_number if the controller
Alan Sternc4334722006-05-19 16:34:57 -0400408 * is runnning. Expand from 11 bits (of which we use only 10) to a
409 * full-sized integer.
410 *
411 * Like many other parts of the driver, this code relies on being polled
412 * more than once per second as long as the controller is running.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 */
414static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
415{
Alan Sternc4334722006-05-19 16:34:57 -0400416 if (!uhci->is_stopped) {
417 unsigned delta;
418
419 delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) &
420 (UHCI_NUMFRAMES - 1);
421 uhci->frame_number += delta;
422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423}
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425/*
426 * De-allocate all resources
427 */
428static void release_uhci(struct uhci_hcd *uhci)
429{
430 int i;
431
Alan Stern8d402e12005-12-17 18:03:37 -0500432 if (DEBUG_CONFIGURED) {
433 spin_lock_irq(&uhci->lock);
434 uhci->is_initialized = 0;
435 spin_unlock_irq(&uhci->lock);
436
437 debugfs_remove(uhci->dentry);
438 }
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 for (i = 0; i < UHCI_NUM_SKELQH; i++)
Alan Stern8b4cd422005-09-16 14:17:45 -0400441 uhci_free_qh(uhci, uhci->skelqh[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Alan Stern8b4cd422005-09-16 14:17:45 -0400443 uhci_free_td(uhci, uhci->term_td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Alan Stern8b4cd422005-09-16 14:17:45 -0400445 dma_pool_destroy(uhci->qh_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Alan Stern8b4cd422005-09-16 14:17:45 -0400447 dma_pool_destroy(uhci->td_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Alan Sterna1d59ce2005-09-16 14:22:51 -0400449 kfree(uhci->frame_cpu);
450
451 dma_free_coherent(uhci_dev(uhci),
452 UHCI_NUMFRAMES * sizeof(*uhci->frame),
453 uhci->frame, uhci->frame_dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
455
David Brownellbe3cbc52006-06-05 12:16:39 -0400456static int uhci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457{
458 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sternc074b412005-04-22 14:39:12 -0400459 unsigned io_size = (unsigned) hcd->rsrc_len;
460 int port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
462 uhci->io_addr = (unsigned long) hcd->rsrc_start;
463
Alan Sternc074b412005-04-22 14:39:12 -0400464 /* The UHCI spec says devices must have 2 ports, and goes on to say
465 * they may have more but gives no way to determine how many there
Alan Sterne07fefa2005-05-31 16:33:21 -0400466 * are. However according to the UHCI spec, Bit 7 of the port
Alan Sternc074b412005-04-22 14:39:12 -0400467 * status and control register is always set to 1. So we try to
Alan Sterne07fefa2005-05-31 16:33:21 -0400468 * use this to our advantage. Another common failure mode when
469 * a nonexistent register is addressed is to return all ones, so
470 * we test for that also.
Alan Sternc074b412005-04-22 14:39:12 -0400471 */
472 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
473 unsigned int portstatus;
474
475 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
Alan Sterne07fefa2005-05-31 16:33:21 -0400476 if (!(portstatus & 0x0080) || portstatus == 0xffff)
Alan Sternc074b412005-04-22 14:39:12 -0400477 break;
478 }
479 if (debug)
480 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
481
Alan Sterne07fefa2005-05-31 16:33:21 -0400482 /* Anything greater than 7 is weird so we'll ignore it. */
483 if (port > UHCI_RH_MAXCHILD) {
Alan Sternc074b412005-04-22 14:39:12 -0400484 dev_info(uhci_dev(uhci), "port count misdetected? "
485 "forcing to 2 ports\n");
486 port = 2;
487 }
488 uhci->rh_numports = port;
489
Alan Sterna8bed8b2005-04-09 17:29:00 -0400490 /* Kick BIOS off this hardware and reset if the controller
491 * isn't already safely quiescent.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400493 check_and_reset_hc(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 return 0;
495}
496
Alan Stern02597d22005-04-28 14:51:27 -0400497/* Make sure the controller is quiescent and that we're not using it
498 * any more. This is mainly for the benefit of programs which, like kexec,
499 * expect the hardware to be idle: not doing DMA or generating IRQs.
500 *
501 * This routine may be called in a damaged or failing kernel. Hence we
502 * do not acquire the spinlock before shutting down the controller.
503 */
504static void uhci_shutdown(struct pci_dev *pdev)
505{
506 struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
507
Alan Sterne323de462006-06-05 12:21:30 -0400508 uhci_hc_died(hcd_to_uhci(hcd));
Alan Stern02597d22005-04-28 14:51:27 -0400509}
510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511/*
512 * Allocate a frame list, and then setup the skeleton
513 *
514 * The hardware doesn't really know any difference
515 * in the queues, but the order does matter for the
516 * protocols higher up. The order is:
517 *
518 * - any isochronous events handled before any
519 * of the queues. We don't do that here, because
520 * we'll create the actual TD entries on demand.
521 * - The first queue is the interrupt queue.
522 * - The second queue is the control queue, split into low- and full-speed
523 * - The third queue is bulk queue.
524 * - The fourth queue is the bandwidth reclamation queue, which loops back
525 * to the full-speed control queue.
526 */
527static int uhci_start(struct usb_hcd *hcd)
528{
529 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
530 int retval = -EBUSY;
Alan Sternc074b412005-04-22 14:39:12 -0400531 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 struct dentry *dentry;
533
Alan Stern6c1b4452005-04-21 16:04:58 -0400534 hcd->uses_new_polling = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 spin_lock_init(&uhci->lock);
Alan Sternc5e3b742006-06-05 12:28:57 -0400537 setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,
538 (unsigned long) uhci);
Alan Sterndccf4a42005-12-17 17:58:46 -0500539 INIT_LIST_HEAD(&uhci->idle_qh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 init_waitqueue_head(&uhci->waitqh);
541
Alan Stern8d402e12005-12-17 18:03:37 -0500542 if (DEBUG_CONFIGURED) {
543 dentry = debugfs_create_file(hcd->self.bus_name,
544 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
545 uhci, &uhci_debug_operations);
546 if (!dentry) {
547 dev_err(uhci_dev(uhci), "couldn't create uhci "
548 "debugfs entry\n");
549 retval = -ENOMEM;
550 goto err_create_debug_entry;
551 }
552 uhci->dentry = dentry;
553 }
554
Alan Sterna1d59ce2005-09-16 14:22:51 -0400555 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
556 UHCI_NUMFRAMES * sizeof(*uhci->frame),
557 &uhci->frame_dma_handle, 0);
558 if (!uhci->frame) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 dev_err(uhci_dev(uhci), "unable to allocate "
560 "consistent memory for frame list\n");
Alan Sterna1d59ce2005-09-16 14:22:51 -0400561 goto err_alloc_frame;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 }
Alan Sterna1d59ce2005-09-16 14:22:51 -0400563 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Alan Sterna1d59ce2005-09-16 14:22:51 -0400565 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
566 GFP_KERNEL);
567 if (!uhci->frame_cpu) {
568 dev_err(uhci_dev(uhci), "unable to allocate "
569 "memory for frame pointers\n");
570 goto err_alloc_frame_cpu;
571 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
574 sizeof(struct uhci_td), 16, 0);
575 if (!uhci->td_pool) {
576 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
577 goto err_create_td_pool;
578 }
579
580 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
581 sizeof(struct uhci_qh), 16, 0);
582 if (!uhci->qh_pool) {
583 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
584 goto err_create_qh_pool;
585 }
586
Alan Stern25321782005-04-25 11:14:31 -0400587 uhci->term_td = uhci_alloc_td(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 if (!uhci->term_td) {
589 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
590 goto err_alloc_term_td;
591 }
592
593 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
Alan Sterndccf4a42005-12-17 17:58:46 -0500594 uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (!uhci->skelqh[i]) {
596 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
597 goto err_alloc_skelqh;
598 }
599 }
600
601 /*
602 * 8 Interrupt queues; link all higher int queues to int1,
603 * then link int1 to control and control to bulk
604 */
605 uhci->skel_int128_qh->link =
606 uhci->skel_int64_qh->link =
607 uhci->skel_int32_qh->link =
608 uhci->skel_int16_qh->link =
609 uhci->skel_int8_qh->link =
610 uhci->skel_int4_qh->link =
Alan Sterndccf4a42005-12-17 17:58:46 -0500611 uhci->skel_int2_qh->link = UHCI_PTR_QH |
612 cpu_to_le32(uhci->skel_int1_qh->dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Alan Sterndccf4a42005-12-17 17:58:46 -0500614 uhci->skel_int1_qh->link = UHCI_PTR_QH |
615 cpu_to_le32(uhci->skel_ls_control_qh->dma_handle);
616 uhci->skel_ls_control_qh->link = UHCI_PTR_QH |
617 cpu_to_le32(uhci->skel_fs_control_qh->dma_handle);
618 uhci->skel_fs_control_qh->link = UHCI_PTR_QH |
619 cpu_to_le32(uhci->skel_bulk_qh->dma_handle);
620 uhci->skel_bulk_qh->link = UHCI_PTR_QH |
621 cpu_to_le32(uhci->skel_term_qh->dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623 /* This dummy TD is to work around a bug in Intel PIIX controllers */
Alan Sternfa346562005-11-30 11:57:51 -0500624 uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
626 uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
627
628 uhci->skel_term_qh->link = UHCI_PTR_TERM;
629 uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
630
631 /*
632 * Fill the frame list: make all entries point to the proper
633 * interrupt queue.
634 *
635 * The interrupt queues will be interleaved as evenly as possible.
636 * There's not much to be done about period-1 interrupts; they have
637 * to occur in every frame. But we can schedule period-2 interrupts
638 * in odd-numbered frames, period-4 interrupts in frames congruent
639 * to 2 (mod 4), and so on. This way each frame only has two
640 * interrupt QHs, which will help spread out bandwidth utilization.
641 */
642 for (i = 0; i < UHCI_NUMFRAMES; i++) {
643 int irq;
644
645 /*
646 * ffs (Find First bit Set) does exactly what we need:
Alan Sterndccf4a42005-12-17 17:58:46 -0500647 * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[8],
648 * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[7], etc.
649 * ffs >= 7 => not on any high-period queue, so use
650 * skel_int1_qh = skelqh[9].
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 * Add UHCI_NUMFRAMES to insure at least one bit is set.
652 */
Alan Sterndccf4a42005-12-17 17:58:46 -0500653 irq = 8 - (int) __ffs(i + UHCI_NUMFRAMES);
654 if (irq <= 1)
655 irq = 9;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
657 /* Only place we don't use the frame list routines */
Alan Sterna1d59ce2005-09-16 14:22:51 -0400658 uhci->frame[i] = UHCI_PTR_QH |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 cpu_to_le32(uhci->skelqh[irq]->dma_handle);
660 }
661
662 /*
663 * Some architectures require a full mb() to enforce completion of
Alan Sterna8bed8b2005-04-09 17:29:00 -0400664 * the memory writes above before the I/O transfers in configure_hc().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 */
666 mb();
Alan Sterna8bed8b2005-04-09 17:29:00 -0400667
668 configure_hc(uhci);
Alan Stern8d402e12005-12-17 18:03:37 -0500669 uhci->is_initialized = 1;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400670 start_rh(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 return 0;
672
673/*
674 * error exits:
675 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676err_alloc_skelqh:
Alan Stern8b4cd422005-09-16 14:17:45 -0400677 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
678 if (uhci->skelqh[i])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 uhci_free_qh(uhci, uhci->skelqh[i]);
Alan Stern8b4cd422005-09-16 14:17:45 -0400680 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
682 uhci_free_td(uhci, uhci->term_td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684err_alloc_term_td:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 dma_pool_destroy(uhci->qh_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687err_create_qh_pool:
688 dma_pool_destroy(uhci->td_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
690err_create_td_pool:
Alan Sterna1d59ce2005-09-16 14:22:51 -0400691 kfree(uhci->frame_cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Alan Sterna1d59ce2005-09-16 14:22:51 -0400693err_alloc_frame_cpu:
694 dma_free_coherent(uhci_dev(uhci),
695 UHCI_NUMFRAMES * sizeof(*uhci->frame),
696 uhci->frame, uhci->frame_dma_handle);
697
698err_alloc_frame:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 debugfs_remove(uhci->dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701err_create_debug_entry:
702 return retval;
703}
704
705static void uhci_stop(struct usb_hcd *hcd)
706{
707 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 spin_lock_irq(&uhci->lock);
Alan Sterne323de462006-06-05 12:21:30 -0400710 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && !uhci->dead)
711 uhci_hc_died(uhci);
David Howells7d12e782006-10-05 14:55:46 +0100712 uhci_scan_schedule(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 spin_unlock_irq(&uhci->lock);
Alan Stern6c1b4452005-04-21 16:04:58 -0400714
Alan Sternc5e3b742006-06-05 12:28:57 -0400715 del_timer_sync(&uhci->fsbr_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 release_uhci(uhci);
717}
718
719#ifdef CONFIG_PM
Alan Sterna8bed8b2005-04-09 17:29:00 -0400720static int uhci_rh_suspend(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721{
722 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
David Brownellbe3cbc52006-06-05 12:16:39 -0400723 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724
725 spin_lock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400726 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
727 rc = -ESHUTDOWN;
Alan Sterne323de462006-06-05 12:21:30 -0400728 else if (!uhci->dead)
Alan Stern4daaa872005-04-09 17:30:08 -0400729 suspend_rh(uhci, UHCI_RH_SUSPENDED);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400730 spin_unlock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400731 return rc;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400732}
733
734static int uhci_rh_resume(struct usb_hcd *hcd)
735{
736 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Stern4daaa872005-04-09 17:30:08 -0400737 int rc = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400738
739 spin_lock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400740 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
741 dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n");
742 rc = -ESHUTDOWN;
Alan Sterne323de462006-06-05 12:21:30 -0400743 } else if (!uhci->dead)
Alan Stern4daaa872005-04-09 17:30:08 -0400744 wakeup_rh(uhci);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400745 spin_unlock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400746 return rc;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400747}
748
749static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
750{
751 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Stern4daaa872005-04-09 17:30:08 -0400752 int rc = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400753
754 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
755
756 spin_lock_irq(&uhci->lock);
Alan Sterne323de462006-06-05 12:21:30 -0400757 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
758 goto done_okay; /* Already suspended or dead */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400759
Alan Stern4daaa872005-04-09 17:30:08 -0400760 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
761 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
Alan Stern4daaa872005-04-09 17:30:08 -0400762 rc = -EBUSY;
763 goto done;
764 };
765
Alan Sterna8bed8b2005-04-09 17:29:00 -0400766 /* All PCI host controllers are required to disable IRQ generation
767 * at the source, so we must turn off PIRQ.
768 */
769 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
Alan Stern42245e62005-12-16 11:09:01 -0800770 mb();
Alan Stern1f09df82005-09-05 13:59:51 -0400771 hcd->poll_rh = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400772
773 /* FIXME: Enable non-PME# remote wakeup? */
774
David Brownell18584992006-08-14 23:11:06 -0700775 /* make sure snapshot being resumed re-enumerates everything */
776 if (message.event == PM_EVENT_PRETHAW)
777 uhci_hc_died(uhci);
778
Alan Sterne323de462006-06-05 12:21:30 -0400779done_okay:
780 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Stern4daaa872005-04-09 17:30:08 -0400781done:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 spin_unlock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400783 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784}
785
786static int uhci_resume(struct usb_hcd *hcd)
787{
788 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
Alan Sterna8bed8b2005-04-09 17:29:00 -0400790 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
791
Alan Stern687f5f32005-11-30 17:16:19 -0500792 /* Since we aren't in D3 any more, it's safe to set this flag
Alan Sterne323de462006-06-05 12:21:30 -0400793 * even if the controller was dead.
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100794 */
795 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Stern42245e62005-12-16 11:09:01 -0800796 mb();
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 spin_lock_irq(&uhci->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Alan Sterna8bed8b2005-04-09 17:29:00 -0400800 /* FIXME: Disable non-PME# remote wakeup? */
801
Alan Sterne323de462006-06-05 12:21:30 -0400802 /* The firmware or a boot kernel may have changed the controller
803 * settings during a system wakeup. Check it and reconfigure
804 * to avoid problems.
Alan Sterna8bed8b2005-04-09 17:29:00 -0400805 */
806 check_and_reset_hc(uhci);
Alan Sterne323de462006-06-05 12:21:30 -0400807
808 /* If the controller was dead before, it's back alive now */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400809 configure_hc(uhci);
810
Alan Stern1c50c312005-11-14 11:45:38 -0500811 if (uhci->rh_state == UHCI_RH_RESET) {
812
813 /* The controller had to be reset */
814 usb_root_hub_lost_power(hcd->self.root_hub);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400815 suspend_rh(uhci, UHCI_RH_SUSPENDED);
Alan Stern1c50c312005-11-14 11:45:38 -0500816 }
Alan Sterna8bed8b2005-04-09 17:29:00 -0400817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 spin_unlock_irq(&uhci->lock);
Alan Stern6c1b4452005-04-21 16:04:58 -0400819
Alan Stern1f09df82005-09-05 13:59:51 -0400820 if (!uhci->working_RD) {
821 /* Suspended root hub needs to be polled */
822 hcd->poll_rh = 1;
Alan Stern6c1b4452005-04-21 16:04:58 -0400823 usb_hcd_poll_rh_status(hcd);
Alan Stern1f09df82005-09-05 13:59:51 -0400824 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 return 0;
826}
827#endif
828
Alan Sterndccf4a42005-12-17 17:58:46 -0500829/* Wait until a particular device/endpoint's QH is idle, and free it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
Alan Sterndccf4a42005-12-17 17:58:46 -0500831 struct usb_host_endpoint *hep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
833 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sterndccf4a42005-12-17 17:58:46 -0500834 struct uhci_qh *qh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Alan Sterndccf4a42005-12-17 17:58:46 -0500836 spin_lock_irq(&uhci->lock);
837 qh = (struct uhci_qh *) hep->hcpriv;
838 if (qh == NULL)
839 goto done;
840
841 while (qh->state != QH_STATE_IDLE) {
842 ++uhci->num_waiting;
843 spin_unlock_irq(&uhci->lock);
844 wait_event_interruptible(uhci->waitqh,
845 qh->state == QH_STATE_IDLE);
846 spin_lock_irq(&uhci->lock);
847 --uhci->num_waiting;
848 }
849
850 uhci_free_qh(uhci, qh);
851done:
852 spin_unlock_irq(&uhci->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853}
854
855static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
856{
857 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sternc4334722006-05-19 16:34:57 -0400858 unsigned frame_number;
859 unsigned delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 /* Minimize latency by avoiding the spinlock */
Alan Sternc4334722006-05-19 16:34:57 -0400862 frame_number = uhci->frame_number;
863 barrier();
864 delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) &
865 (UHCI_NUMFRAMES - 1);
866 return frame_number + delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867}
868
869static const char hcd_name[] = "uhci_hcd";
870
871static const struct hc_driver uhci_driver = {
872 .description = hcd_name,
873 .product_desc = "UHCI Host Controller",
874 .hcd_priv_size = sizeof(struct uhci_hcd),
875
876 /* Generic hardware linkage */
877 .irq = uhci_irq,
878 .flags = HCD_USB11,
879
880 /* Basic lifecycle operations */
David Brownellbe3cbc52006-06-05 12:16:39 -0400881 .reset = uhci_init,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 .start = uhci_start,
883#ifdef CONFIG_PM
884 .suspend = uhci_suspend,
885 .resume = uhci_resume,
Alan Stern0c0382e2005-10-13 17:08:02 -0400886 .bus_suspend = uhci_rh_suspend,
887 .bus_resume = uhci_rh_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888#endif
889 .stop = uhci_stop,
890
891 .urb_enqueue = uhci_urb_enqueue,
892 .urb_dequeue = uhci_urb_dequeue,
893
894 .endpoint_disable = uhci_hcd_endpoint_disable,
895 .get_frame_number = uhci_hcd_get_frame_number,
896
897 .hub_status_data = uhci_hub_status_data,
898 .hub_control = uhci_hub_control,
899};
900
901static const struct pci_device_id uhci_pci_ids[] = { {
902 /* handle any USB UHCI controller */
Jean Delvarec67808e2006-04-09 20:07:35 +0200903 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 .driver_data = (unsigned long) &uhci_driver,
905 }, { /* end: all zeroes */ }
906};
907
908MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
909
910static struct pci_driver uhci_pci_driver = {
911 .name = (char *)hcd_name,
912 .id_table = uhci_pci_ids,
913
914 .probe = usb_hcd_pci_probe,
915 .remove = usb_hcd_pci_remove,
Alan Stern02597d22005-04-28 14:51:27 -0400916 .shutdown = uhci_shutdown,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
918#ifdef CONFIG_PM
919 .suspend = usb_hcd_pci_suspend,
920 .resume = usb_hcd_pci_resume,
921#endif /* PM */
922};
923
924static int __init uhci_hcd_init(void)
925{
926 int retval = -ENOMEM;
927
Alan Stern5f8364b2006-12-05 16:29:55 -0500928 printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "%s\n",
929 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931 if (usb_disabled())
932 return -ENODEV;
933
Alan Stern8d402e12005-12-17 18:03:37 -0500934 if (DEBUG_CONFIGURED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
936 if (!errbuf)
937 goto errbuf_failed;
Alan Stern8d402e12005-12-17 18:03:37 -0500938 uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
939 if (!uhci_debugfs_root)
940 goto debug_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 }
942
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
944 sizeof(struct urb_priv), 0, 0, NULL, NULL);
945 if (!uhci_up_cachep)
946 goto up_failed;
947
948 retval = pci_register_driver(&uhci_pci_driver);
949 if (retval)
950 goto init_failed;
951
952 return 0;
953
954init_failed:
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700955 kmem_cache_destroy(uhci_up_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
957up_failed:
958 debugfs_remove(uhci_debugfs_root);
959
960debug_failed:
Jesper Juhl1bc3c9e2005-04-18 17:39:34 -0700961 kfree(errbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963errbuf_failed:
964
965 return retval;
966}
967
968static void __exit uhci_hcd_cleanup(void)
969{
970 pci_unregister_driver(&uhci_pci_driver);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700971 kmem_cache_destroy(uhci_up_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 debugfs_remove(uhci_debugfs_root);
Jesper Juhl1bc3c9e2005-04-18 17:39:34 -0700973 kfree(errbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974}
975
976module_init(uhci_hcd_init);
977module_exit(uhci_hcd_cleanup);
978
979MODULE_AUTHOR(DRIVER_AUTHOR);
980MODULE_DESCRIPTION(DRIVER_DESC);
981MODULE_LICENSE("GPL");