blob: dc9ed29c61752a6c9f0f1719bef9e8ad47b16741 [file] [log] [blame]
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
25#include <linux/config.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/module.h>
27#include <linux/pci.h>
28#include <linux/kernel.h>
29#include <linux/init.h>
30#include <linux/delay.h>
31#include <linux/ioport.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/errno.h>
35#include <linux/unistd.h>
36#include <linux/interrupt.h>
37#include <linux/spinlock.h>
38#include <linux/debugfs.h>
39#include <linux/pm.h>
40#include <linux/dmapool.h>
41#include <linux/dma-mapping.h>
42#include <linux/usb.h>
43#include <linux/bitops.h>
44
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
63/*
64 * debug = 0, no debugging messages
Alan Stern687f5f32005-11-30 17:16:19 -050065 * debug = 1, dump failed URBs except for stalls
66 * debug = 2, dump all failed URBs (including stalls)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 * show all queues in /debug/uhci/[pci_addr]
Alan Stern687f5f32005-11-30 17:16:19 -050068 * debug = 3, show all TDs in URBs when dumping
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 */
70#ifdef DEBUG
Alan Stern8d402e12005-12-17 18:03:37 -050071#define DEBUG_CONFIGURED 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070072static int debug = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073module_param(debug, int, S_IRUGO | S_IWUSR);
74MODULE_PARM_DESC(debug, "Debug level");
Alan Stern8d402e12005-12-17 18:03:37 -050075
76#else
77#define DEBUG_CONFIGURED 0
78#define debug 0
79#endif
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081static char *errbuf;
82#define ERRBUF_LEN (32 * 1024)
83
84static kmem_cache_t *uhci_up_cachep; /* urb_priv */
85
Alan Stern6c1b4452005-04-21 16:04:58 -040086static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
87static void wakeup_rh(struct uhci_hcd *uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090#include "uhci-debug.c"
91#include "uhci-q.c"
Alan Stern1f09df82005-09-05 13:59:51 -040092#include "uhci-hub.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Alan Sterna8bed8b2005-04-09 17:29:00 -040094/*
Alan Sternbb200f62005-10-03 16:36:29 -040095 * Finish up a host controller reset and update the recorded state.
Alan Sterna8bed8b2005-04-09 17:29:00 -040096 */
Alan Sternbb200f62005-10-03 16:36:29 -040097static void finish_reset(struct uhci_hcd *uhci)
Alan Stern014e73c2005-04-09 17:24:42 -040098{
Alan Sternc074b412005-04-22 14:39:12 -040099 int port;
100
Alan Sternc074b412005-04-22 14:39:12 -0400101 /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect
102 * bits in the port status and control registers.
103 * We have to clear them by hand.
104 */
105 for (port = 0; port < uhci->rh_numports; ++port)
106 outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
107
Alan Stern8e326402006-04-04 14:47:44 -0400108 uhci->port_c_suspend = uhci->resuming_ports = 0;
Alan Sternc8f4fe42005-04-09 17:27:32 -0400109 uhci->rh_state = UHCI_RH_RESET;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400110 uhci->is_stopped = UHCI_IS_STOPPED;
111 uhci_to_hcd(uhci)->state = HC_STATE_HALT;
Alan Stern6c1b4452005-04-21 16:04:58 -0400112 uhci_to_hcd(uhci)->poll_rh = 0;
Alan Stern014e73c2005-04-09 17:24:42 -0400113}
114
Alan Sterna8bed8b2005-04-09 17:29:00 -0400115/*
Alan Stern4daaa872005-04-09 17:30:08 -0400116 * Last rites for a defunct/nonfunctional controller
Alan Stern02597d22005-04-28 14:51:27 -0400117 * or one we don't want to use any more.
Alan Stern4daaa872005-04-09 17:30:08 -0400118 */
119static void hc_died(struct uhci_hcd *uhci)
120{
Alan Sternbb200f62005-10-03 16:36:29 -0400121 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
122 finish_reset(uhci);
Alan Stern4daaa872005-04-09 17:30:08 -0400123 uhci->hc_inaccessible = 1;
124}
125
126/*
David Brownellbe3cbc52006-06-05 12:16:39 -0400127 * Initialize a controller that was newly discovered or has lost power
128 * or otherwise been reset while it was suspended. In none of these cases
129 * can we be sure of its previous state.
Alan Sterna8bed8b2005-04-09 17:29:00 -0400130 */
131static void check_and_reset_hc(struct uhci_hcd *uhci)
132{
Alan Sternbb200f62005-10-03 16:36:29 -0400133 if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
134 finish_reset(uhci);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400135}
136
137/*
138 * Store the basic register settings needed by the controller.
139 */
140static void configure_hc(struct uhci_hcd *uhci)
141{
142 /* Set the frame length to the default: 1 ms exactly */
143 outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
144
145 /* Store the frame list base address */
Alan Sterna1d59ce2005-09-16 14:22:51 -0400146 outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400147
148 /* Set the current frame number */
Alan Sternc4334722006-05-19 16:34:57 -0400149 outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
150 uhci->io_addr + USBFRNUM);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400151
Alan Sternf37be9b2005-10-17 10:42:06 -0400152 /* Mark controller as not halted before we enable interrupts */
153 uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400154 mb();
155
156 /* Enable PIRQ */
157 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
158 USBLEGSUP_DEFAULT);
159}
160
161
Alan Sternc8f4fe42005-04-09 17:27:32 -0400162static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
Alan Stern014e73c2005-04-09 17:24:42 -0400163{
Alan Sternc8f4fe42005-04-09 17:27:32 -0400164 int port;
Alan Stern014e73c2005-04-09 17:24:42 -0400165
Alan Sternc8f4fe42005-04-09 17:27:32 -0400166 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
167 default:
168 break;
Alan Stern014e73c2005-04-09 17:24:42 -0400169
Alan Sternc8f4fe42005-04-09 17:27:32 -0400170 case PCI_VENDOR_ID_GENESYS:
171 /* Genesys Logic's GL880S controllers don't generate
172 * resume-detect interrupts.
173 */
174 return 1;
175
176 case PCI_VENDOR_ID_INTEL:
177 /* Some of Intel's USB controllers have a bug that causes
178 * resume-detect interrupts if any port has an over-current
179 * condition. To make matters worse, some motherboards
180 * hardwire unused USB ports' over-current inputs active!
181 * To prevent problems, we will not enable resume-detect
182 * interrupts if any ports are OC.
183 */
184 for (port = 0; port < uhci->rh_numports; ++port) {
185 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
186 USBPORTSC_OC)
187 return 1;
188 }
189 break;
190 }
191 return 0;
192}
193
Alan Sterna8bed8b2005-04-09 17:29:00 -0400194static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
Alan Sternc8f4fe42005-04-09 17:27:32 -0400195__releases(uhci->lock)
196__acquires(uhci->lock)
197{
198 int auto_stop;
199 int int_enable;
200
201 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
David Brownellbe3cbc52006-06-05 12:16:39 -0400202 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
203 "%s%s\n", __FUNCTION__,
Alan Sternc8f4fe42005-04-09 17:27:32 -0400204 (auto_stop ? " (auto-stop)" : ""));
205
206 /* If we get a suspend request when we're already auto-stopped
207 * then there's nothing to do.
208 */
209 if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) {
210 uhci->rh_state = new_state;
211 return;
212 }
213
214 /* Enable resume-detect interrupts if they work.
215 * Then enter Global Suspend mode, still configured.
216 */
Alan Stern1f09df82005-09-05 13:59:51 -0400217 uhci->working_RD = 1;
218 int_enable = USBINTR_RESUME;
219 if (resume_detect_interrupts_are_broken(uhci)) {
220 uhci->working_RD = int_enable = 0;
221 }
Alan Sternc8f4fe42005-04-09 17:27:32 -0400222 outw(int_enable, uhci->io_addr + USBINTR);
223 outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400224 mb();
Alan Sternc8f4fe42005-04-09 17:27:32 -0400225 udelay(5);
226
227 /* If we're auto-stopping then no devices have been attached
228 * for a while, so there shouldn't be any active URBs and the
229 * controller should stop after a few microseconds. Otherwise
230 * we will give the controller one frame to stop.
231 */
232 if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
233 uhci->rh_state = UHCI_RH_SUSPENDING;
234 spin_unlock_irq(&uhci->lock);
235 msleep(1);
236 spin_lock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400237 if (uhci->hc_inaccessible) /* Died */
238 return;
Alan Sternc8f4fe42005-04-09 17:27:32 -0400239 }
240 if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
David Brownellbe3cbc52006-06-05 12:16:39 -0400241 dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev,
242 "Controller not stopped yet!\n");
Alan Sternc8f4fe42005-04-09 17:27:32 -0400243
Alan Stern014e73c2005-04-09 17:24:42 -0400244 uhci_get_current_frame_number(uhci);
Alan Sternc8f4fe42005-04-09 17:27:32 -0400245
246 uhci->rh_state = new_state;
Alan Stern014e73c2005-04-09 17:24:42 -0400247 uhci->is_stopped = UHCI_IS_STOPPED;
Alan Stern6c1b4452005-04-21 16:04:58 -0400248 uhci_to_hcd(uhci)->poll_rh = !int_enable;
Alan Stern014e73c2005-04-09 17:24:42 -0400249
250 uhci_scan_schedule(uhci, NULL);
Alan Stern84afddd2006-05-12 11:35:45 -0400251 uhci_fsbr_off(uhci);
Alan Stern014e73c2005-04-09 17:24:42 -0400252}
253
Alan Sterna8bed8b2005-04-09 17:29:00 -0400254static void start_rh(struct uhci_hcd *uhci)
255{
Alan Sternf37be9b2005-10-17 10:42:06 -0400256 uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400257 uhci->is_stopped = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400258
259 /* Mark it configured and running with a 64-byte max packet.
260 * All interrupts are enabled, even though RESUME won't do anything.
261 */
262 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
263 outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
264 uhci->io_addr + USBINTR);
265 mb();
Alan Stern6c1b4452005-04-21 16:04:58 -0400266 uhci->rh_state = UHCI_RH_RUNNING;
267 uhci_to_hcd(uhci)->poll_rh = 1;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400268}
269
270static void wakeup_rh(struct uhci_hcd *uhci)
Alan Sternc8f4fe42005-04-09 17:27:32 -0400271__releases(uhci->lock)
272__acquires(uhci->lock)
Alan Stern014e73c2005-04-09 17:24:42 -0400273{
David Brownellbe3cbc52006-06-05 12:16:39 -0400274 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
275 "%s%s\n", __FUNCTION__,
Alan Sternc8f4fe42005-04-09 17:27:32 -0400276 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
277 " (auto-start)" : "");
Alan Stern014e73c2005-04-09 17:24:42 -0400278
Alan Sternc8f4fe42005-04-09 17:27:32 -0400279 /* If we are auto-stopped then no devices are attached so there's
280 * no need for wakeup signals. Otherwise we send Global Resume
281 * for 20 ms.
282 */
283 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
284 uhci->rh_state = UHCI_RH_RESUMING;
285 outw(USBCMD_FGR | USBCMD_EGSM | USBCMD_CF,
286 uhci->io_addr + USBCMD);
287 spin_unlock_irq(&uhci->lock);
288 msleep(20);
289 spin_lock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400290 if (uhci->hc_inaccessible) /* Died */
291 return;
Alan Stern014e73c2005-04-09 17:24:42 -0400292
Alan Sternc8f4fe42005-04-09 17:27:32 -0400293 /* End Global Resume and wait for EOP to be sent */
294 outw(USBCMD_CF, uhci->io_addr + USBCMD);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400295 mb();
Alan Sternc8f4fe42005-04-09 17:27:32 -0400296 udelay(4);
297 if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
298 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
Alan Stern014e73c2005-04-09 17:24:42 -0400299 }
Alan Sternc8f4fe42005-04-09 17:27:32 -0400300
Alan Sterna8bed8b2005-04-09 17:29:00 -0400301 start_rh(uhci);
Alan Stern014e73c2005-04-09 17:24:42 -0400302
Alan Stern6c1b4452005-04-21 16:04:58 -0400303 /* Restart root hub polling */
304 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
Alan Stern014e73c2005-04-09 17:24:42 -0400305}
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
308{
309 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 unsigned short status;
Alan Stern4daaa872005-04-09 17:30:08 -0400311 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313 /*
314 * Read the interrupt status, and write it back to clear the
315 * interrupt cause. Contrary to the UHCI specification, the
316 * "HC Halted" status bit is persistent: it is RO, not R/WC.
317 */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400318 status = inw(uhci->io_addr + USBSTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */
320 return IRQ_NONE;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400321 outw(status, uhci->io_addr + USBSTS); /* Clear it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
324 if (status & USBSTS_HSE)
325 dev_err(uhci_dev(uhci), "host system error, "
326 "PCI problems?\n");
327 if (status & USBSTS_HCPE)
328 dev_err(uhci_dev(uhci), "host controller process "
329 "error, something bad happened!\n");
Alan Stern4daaa872005-04-09 17:30:08 -0400330 if (status & USBSTS_HCH) {
331 spin_lock_irqsave(&uhci->lock, flags);
332 if (uhci->rh_state >= UHCI_RH_RUNNING) {
333 dev_err(uhci_dev(uhci),
334 "host controller halted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 "very bad!\n");
Alan Stern8d402e12005-12-17 18:03:37 -0500336 if (debug > 1 && errbuf) {
337 /* Print the schedule for debugging */
338 uhci_sprint_schedule(uhci,
339 errbuf, ERRBUF_LEN);
340 lprintk(errbuf);
341 }
Alan Stern4daaa872005-04-09 17:30:08 -0400342 hc_died(uhci);
Alan Stern1f09df82005-09-05 13:59:51 -0400343
344 /* Force a callback in case there are
345 * pending unlinks */
346 mod_timer(&hcd->rh_timer, jiffies);
Alan Stern4daaa872005-04-09 17:30:08 -0400347 }
348 spin_unlock_irqrestore(&uhci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 }
350 }
351
352 if (status & USBSTS_RD)
Alan Stern6c1b4452005-04-21 16:04:58 -0400353 usb_hcd_poll_rh_status(hcd);
Alan Stern1f09df82005-09-05 13:59:51 -0400354 else {
355 spin_lock_irqsave(&uhci->lock, flags);
356 uhci_scan_schedule(uhci, regs);
357 spin_unlock_irqrestore(&uhci->lock, flags);
358 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 return IRQ_HANDLED;
361}
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363/*
364 * Store the current frame number in uhci->frame_number if the controller
Alan Sternc4334722006-05-19 16:34:57 -0400365 * is runnning. Expand from 11 bits (of which we use only 10) to a
366 * full-sized integer.
367 *
368 * Like many other parts of the driver, this code relies on being polled
369 * more than once per second as long as the controller is running.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 */
371static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
372{
Alan Sternc4334722006-05-19 16:34:57 -0400373 if (!uhci->is_stopped) {
374 unsigned delta;
375
376 delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) &
377 (UHCI_NUMFRAMES - 1);
378 uhci->frame_number += delta;
379 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380}
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382/*
383 * De-allocate all resources
384 */
385static void release_uhci(struct uhci_hcd *uhci)
386{
387 int i;
388
Alan Stern8d402e12005-12-17 18:03:37 -0500389 if (DEBUG_CONFIGURED) {
390 spin_lock_irq(&uhci->lock);
391 uhci->is_initialized = 0;
392 spin_unlock_irq(&uhci->lock);
393
394 debugfs_remove(uhci->dentry);
395 }
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 for (i = 0; i < UHCI_NUM_SKELQH; i++)
Alan Stern8b4cd422005-09-16 14:17:45 -0400398 uhci_free_qh(uhci, uhci->skelqh[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Alan Stern8b4cd422005-09-16 14:17:45 -0400400 uhci_free_td(uhci, uhci->term_td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Alan Stern8b4cd422005-09-16 14:17:45 -0400402 dma_pool_destroy(uhci->qh_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Alan Stern8b4cd422005-09-16 14:17:45 -0400404 dma_pool_destroy(uhci->td_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Alan Sterna1d59ce2005-09-16 14:22:51 -0400406 kfree(uhci->frame_cpu);
407
408 dma_free_coherent(uhci_dev(uhci),
409 UHCI_NUMFRAMES * sizeof(*uhci->frame),
410 uhci->frame, uhci->frame_dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411}
412
David Brownellbe3cbc52006-06-05 12:16:39 -0400413static int uhci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
415 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sternc074b412005-04-22 14:39:12 -0400416 unsigned io_size = (unsigned) hcd->rsrc_len;
417 int port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419 uhci->io_addr = (unsigned long) hcd->rsrc_start;
420
Alan Sternc074b412005-04-22 14:39:12 -0400421 /* The UHCI spec says devices must have 2 ports, and goes on to say
422 * they may have more but gives no way to determine how many there
Alan Sterne07fefa2005-05-31 16:33:21 -0400423 * are. However according to the UHCI spec, Bit 7 of the port
Alan Sternc074b412005-04-22 14:39:12 -0400424 * status and control register is always set to 1. So we try to
Alan Sterne07fefa2005-05-31 16:33:21 -0400425 * use this to our advantage. Another common failure mode when
426 * a nonexistent register is addressed is to return all ones, so
427 * we test for that also.
Alan Sternc074b412005-04-22 14:39:12 -0400428 */
429 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
430 unsigned int portstatus;
431
432 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
Alan Sterne07fefa2005-05-31 16:33:21 -0400433 if (!(portstatus & 0x0080) || portstatus == 0xffff)
Alan Sternc074b412005-04-22 14:39:12 -0400434 break;
435 }
436 if (debug)
437 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
438
Alan Sterne07fefa2005-05-31 16:33:21 -0400439 /* Anything greater than 7 is weird so we'll ignore it. */
440 if (port > UHCI_RH_MAXCHILD) {
Alan Sternc074b412005-04-22 14:39:12 -0400441 dev_info(uhci_dev(uhci), "port count misdetected? "
442 "forcing to 2 ports\n");
443 port = 2;
444 }
445 uhci->rh_numports = port;
446
Alan Sterna8bed8b2005-04-09 17:29:00 -0400447 /* Kick BIOS off this hardware and reset if the controller
448 * isn't already safely quiescent.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 */
Alan Sterna8bed8b2005-04-09 17:29:00 -0400450 check_and_reset_hc(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 return 0;
452}
453
Alan Stern02597d22005-04-28 14:51:27 -0400454/* Make sure the controller is quiescent and that we're not using it
455 * any more. This is mainly for the benefit of programs which, like kexec,
456 * expect the hardware to be idle: not doing DMA or generating IRQs.
457 *
458 * This routine may be called in a damaged or failing kernel. Hence we
459 * do not acquire the spinlock before shutting down the controller.
460 */
461static void uhci_shutdown(struct pci_dev *pdev)
462{
463 struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
464
465 hc_died(hcd_to_uhci(hcd));
466}
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468/*
469 * Allocate a frame list, and then setup the skeleton
470 *
471 * The hardware doesn't really know any difference
472 * in the queues, but the order does matter for the
473 * protocols higher up. The order is:
474 *
475 * - any isochronous events handled before any
476 * of the queues. We don't do that here, because
477 * we'll create the actual TD entries on demand.
478 * - The first queue is the interrupt queue.
479 * - The second queue is the control queue, split into low- and full-speed
480 * - The third queue is bulk queue.
481 * - The fourth queue is the bandwidth reclamation queue, which loops back
482 * to the full-speed control queue.
483 */
484static int uhci_start(struct usb_hcd *hcd)
485{
486 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
487 int retval = -EBUSY;
Alan Sternc074b412005-04-22 14:39:12 -0400488 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 struct dentry *dentry;
490
Alan Stern6c1b4452005-04-21 16:04:58 -0400491 hcd->uses_new_polling = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 spin_lock_init(&uhci->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Alan Sterndccf4a42005-12-17 17:58:46 -0500495 INIT_LIST_HEAD(&uhci->idle_qh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497 init_waitqueue_head(&uhci->waitqh);
498
Alan Stern8d402e12005-12-17 18:03:37 -0500499 if (DEBUG_CONFIGURED) {
500 dentry = debugfs_create_file(hcd->self.bus_name,
501 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
502 uhci, &uhci_debug_operations);
503 if (!dentry) {
504 dev_err(uhci_dev(uhci), "couldn't create uhci "
505 "debugfs entry\n");
506 retval = -ENOMEM;
507 goto err_create_debug_entry;
508 }
509 uhci->dentry = dentry;
510 }
511
Alan Sterna1d59ce2005-09-16 14:22:51 -0400512 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
513 UHCI_NUMFRAMES * sizeof(*uhci->frame),
514 &uhci->frame_dma_handle, 0);
515 if (!uhci->frame) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 dev_err(uhci_dev(uhci), "unable to allocate "
517 "consistent memory for frame list\n");
Alan Sterna1d59ce2005-09-16 14:22:51 -0400518 goto err_alloc_frame;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 }
Alan Sterna1d59ce2005-09-16 14:22:51 -0400520 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Alan Sterna1d59ce2005-09-16 14:22:51 -0400522 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
523 GFP_KERNEL);
524 if (!uhci->frame_cpu) {
525 dev_err(uhci_dev(uhci), "unable to allocate "
526 "memory for frame pointers\n");
527 goto err_alloc_frame_cpu;
528 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
531 sizeof(struct uhci_td), 16, 0);
532 if (!uhci->td_pool) {
533 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
534 goto err_create_td_pool;
535 }
536
537 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
538 sizeof(struct uhci_qh), 16, 0);
539 if (!uhci->qh_pool) {
540 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
541 goto err_create_qh_pool;
542 }
543
Alan Stern25321782005-04-25 11:14:31 -0400544 uhci->term_td = uhci_alloc_td(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 if (!uhci->term_td) {
546 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
547 goto err_alloc_term_td;
548 }
549
550 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
Alan Sterndccf4a42005-12-17 17:58:46 -0500551 uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 if (!uhci->skelqh[i]) {
553 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
554 goto err_alloc_skelqh;
555 }
556 }
557
558 /*
559 * 8 Interrupt queues; link all higher int queues to int1,
560 * then link int1 to control and control to bulk
561 */
562 uhci->skel_int128_qh->link =
563 uhci->skel_int64_qh->link =
564 uhci->skel_int32_qh->link =
565 uhci->skel_int16_qh->link =
566 uhci->skel_int8_qh->link =
567 uhci->skel_int4_qh->link =
Alan Sterndccf4a42005-12-17 17:58:46 -0500568 uhci->skel_int2_qh->link = UHCI_PTR_QH |
569 cpu_to_le32(uhci->skel_int1_qh->dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Alan Sterndccf4a42005-12-17 17:58:46 -0500571 uhci->skel_int1_qh->link = UHCI_PTR_QH |
572 cpu_to_le32(uhci->skel_ls_control_qh->dma_handle);
573 uhci->skel_ls_control_qh->link = UHCI_PTR_QH |
574 cpu_to_le32(uhci->skel_fs_control_qh->dma_handle);
575 uhci->skel_fs_control_qh->link = UHCI_PTR_QH |
576 cpu_to_le32(uhci->skel_bulk_qh->dma_handle);
577 uhci->skel_bulk_qh->link = UHCI_PTR_QH |
578 cpu_to_le32(uhci->skel_term_qh->dma_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 /* This dummy TD is to work around a bug in Intel PIIX controllers */
Alan Sternfa346562005-11-30 11:57:51 -0500581 uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
583 uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
584
585 uhci->skel_term_qh->link = UHCI_PTR_TERM;
586 uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
587
588 /*
589 * Fill the frame list: make all entries point to the proper
590 * interrupt queue.
591 *
592 * The interrupt queues will be interleaved as evenly as possible.
593 * There's not much to be done about period-1 interrupts; they have
594 * to occur in every frame. But we can schedule period-2 interrupts
595 * in odd-numbered frames, period-4 interrupts in frames congruent
596 * to 2 (mod 4), and so on. This way each frame only has two
597 * interrupt QHs, which will help spread out bandwidth utilization.
598 */
599 for (i = 0; i < UHCI_NUMFRAMES; i++) {
600 int irq;
601
602 /*
603 * ffs (Find First bit Set) does exactly what we need:
Alan Sterndccf4a42005-12-17 17:58:46 -0500604 * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[8],
605 * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[7], etc.
606 * ffs >= 7 => not on any high-period queue, so use
607 * skel_int1_qh = skelqh[9].
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 * Add UHCI_NUMFRAMES to insure at least one bit is set.
609 */
Alan Sterndccf4a42005-12-17 17:58:46 -0500610 irq = 8 - (int) __ffs(i + UHCI_NUMFRAMES);
611 if (irq <= 1)
612 irq = 9;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614 /* Only place we don't use the frame list routines */
Alan Sterna1d59ce2005-09-16 14:22:51 -0400615 uhci->frame[i] = UHCI_PTR_QH |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 cpu_to_le32(uhci->skelqh[irq]->dma_handle);
617 }
618
619 /*
620 * Some architectures require a full mb() to enforce completion of
Alan Sterna8bed8b2005-04-09 17:29:00 -0400621 * the memory writes above before the I/O transfers in configure_hc().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 */
623 mb();
Alan Sterna8bed8b2005-04-09 17:29:00 -0400624
625 configure_hc(uhci);
Alan Stern8d402e12005-12-17 18:03:37 -0500626 uhci->is_initialized = 1;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400627 start_rh(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 return 0;
629
630/*
631 * error exits:
632 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633err_alloc_skelqh:
Alan Stern8b4cd422005-09-16 14:17:45 -0400634 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
635 if (uhci->skelqh[i])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 uhci_free_qh(uhci, uhci->skelqh[i]);
Alan Stern8b4cd422005-09-16 14:17:45 -0400637 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 uhci_free_td(uhci, uhci->term_td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641err_alloc_term_td:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 dma_pool_destroy(uhci->qh_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644err_create_qh_pool:
645 dma_pool_destroy(uhci->td_pool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647err_create_td_pool:
Alan Sterna1d59ce2005-09-16 14:22:51 -0400648 kfree(uhci->frame_cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Alan Sterna1d59ce2005-09-16 14:22:51 -0400650err_alloc_frame_cpu:
651 dma_free_coherent(uhci_dev(uhci),
652 UHCI_NUMFRAMES * sizeof(*uhci->frame),
653 uhci->frame, uhci->frame_dma_handle);
654
655err_alloc_frame:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 debugfs_remove(uhci->dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658err_create_debug_entry:
659 return retval;
660}
661
662static void uhci_stop(struct usb_hcd *hcd)
663{
664 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 spin_lock_irq(&uhci->lock);
Alan Stern1f09df82005-09-05 13:59:51 -0400667 if (!uhci->hc_inaccessible)
Alan Sternbb200f62005-10-03 16:36:29 -0400668 hc_died(uhci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 uhci_scan_schedule(uhci, NULL);
670 spin_unlock_irq(&uhci->lock);
Alan Stern6c1b4452005-04-21 16:04:58 -0400671
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 release_uhci(uhci);
673}
674
675#ifdef CONFIG_PM
Alan Sterna8bed8b2005-04-09 17:29:00 -0400676static int uhci_rh_suspend(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677{
678 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
David Brownellbe3cbc52006-06-05 12:16:39 -0400679 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 spin_lock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400682 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
683 rc = -ESHUTDOWN;
684 else if (!uhci->hc_inaccessible)
Alan Stern4daaa872005-04-09 17:30:08 -0400685 suspend_rh(uhci, UHCI_RH_SUSPENDED);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400686 spin_unlock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400687 return rc;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400688}
689
690static int uhci_rh_resume(struct usb_hcd *hcd)
691{
692 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Stern4daaa872005-04-09 17:30:08 -0400693 int rc = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400694
695 spin_lock_irq(&uhci->lock);
David Brownellbe3cbc52006-06-05 12:16:39 -0400696 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
697 dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n");
698 rc = -ESHUTDOWN;
699 } else if (!uhci->hc_inaccessible)
Alan Stern4daaa872005-04-09 17:30:08 -0400700 wakeup_rh(uhci);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400701 spin_unlock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400702 return rc;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400703}
704
705static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
706{
707 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Stern4daaa872005-04-09 17:30:08 -0400708 int rc = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400709
710 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
711
712 spin_lock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400713 if (uhci->hc_inaccessible) /* Dead or already suspended */
714 goto done;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400715
Alan Stern4daaa872005-04-09 17:30:08 -0400716 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
717 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
Alan Stern4daaa872005-04-09 17:30:08 -0400718 rc = -EBUSY;
719 goto done;
720 };
721
Alan Sterna8bed8b2005-04-09 17:29:00 -0400722 /* All PCI host controllers are required to disable IRQ generation
723 * at the source, so we must turn off PIRQ.
724 */
725 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
Alan Stern42245e62005-12-16 11:09:01 -0800726 mb();
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100727 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400728 uhci->hc_inaccessible = 1;
Alan Stern1f09df82005-09-05 13:59:51 -0400729 hcd->poll_rh = 0;
Alan Sterna8bed8b2005-04-09 17:29:00 -0400730
731 /* FIXME: Enable non-PME# remote wakeup? */
732
Alan Stern4daaa872005-04-09 17:30:08 -0400733done:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 spin_unlock_irq(&uhci->lock);
Alan Stern4daaa872005-04-09 17:30:08 -0400735 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736}
737
738static int uhci_resume(struct usb_hcd *hcd)
739{
740 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
Alan Sterna8bed8b2005-04-09 17:29:00 -0400742 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
743
Alan Stern687f5f32005-11-30 17:16:19 -0500744 /* Since we aren't in D3 any more, it's safe to set this flag
745 * even if the controller was dead. It might not even be dead
746 * any more, if the firmware or quirks code has reset it.
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100747 */
748 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Stern42245e62005-12-16 11:09:01 -0800749 mb();
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100750
Alan Stern4daaa872005-04-09 17:30:08 -0400751 if (uhci->rh_state == UHCI_RH_RESET) /* Dead */
752 return 0;
David Brownellbe3cbc52006-06-05 12:16:39 -0400753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 spin_lock_irq(&uhci->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
Alan Sterna8bed8b2005-04-09 17:29:00 -0400756 /* FIXME: Disable non-PME# remote wakeup? */
757
758 uhci->hc_inaccessible = 0;
759
760 /* The BIOS may have changed the controller settings during a
761 * system wakeup. Check it and reconfigure to avoid problems.
762 */
763 check_and_reset_hc(uhci);
764 configure_hc(uhci);
765
Alan Stern1c50c312005-11-14 11:45:38 -0500766 if (uhci->rh_state == UHCI_RH_RESET) {
767
768 /* The controller had to be reset */
769 usb_root_hub_lost_power(hcd->self.root_hub);
Alan Sterna8bed8b2005-04-09 17:29:00 -0400770 suspend_rh(uhci, UHCI_RH_SUSPENDED);
Alan Stern1c50c312005-11-14 11:45:38 -0500771 }
Alan Sterna8bed8b2005-04-09 17:29:00 -0400772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 spin_unlock_irq(&uhci->lock);
Alan Stern6c1b4452005-04-21 16:04:58 -0400774
Alan Stern1f09df82005-09-05 13:59:51 -0400775 if (!uhci->working_RD) {
776 /* Suspended root hub needs to be polled */
777 hcd->poll_rh = 1;
Alan Stern6c1b4452005-04-21 16:04:58 -0400778 usb_hcd_poll_rh_status(hcd);
Alan Stern1f09df82005-09-05 13:59:51 -0400779 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 return 0;
781}
782#endif
783
Alan Sterndccf4a42005-12-17 17:58:46 -0500784/* Wait until a particular device/endpoint's QH is idle, and free it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
Alan Sterndccf4a42005-12-17 17:58:46 -0500786 struct usb_host_endpoint *hep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787{
788 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sterndccf4a42005-12-17 17:58:46 -0500789 struct uhci_qh *qh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Alan Sterndccf4a42005-12-17 17:58:46 -0500791 spin_lock_irq(&uhci->lock);
792 qh = (struct uhci_qh *) hep->hcpriv;
793 if (qh == NULL)
794 goto done;
795
796 while (qh->state != QH_STATE_IDLE) {
797 ++uhci->num_waiting;
798 spin_unlock_irq(&uhci->lock);
799 wait_event_interruptible(uhci->waitqh,
800 qh->state == QH_STATE_IDLE);
801 spin_lock_irq(&uhci->lock);
802 --uhci->num_waiting;
803 }
804
805 uhci_free_qh(uhci, qh);
806done:
807 spin_unlock_irq(&uhci->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
809
810static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
811{
812 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
Alan Sternc4334722006-05-19 16:34:57 -0400813 unsigned frame_number;
814 unsigned delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816 /* Minimize latency by avoiding the spinlock */
Alan Sternc4334722006-05-19 16:34:57 -0400817 frame_number = uhci->frame_number;
818 barrier();
819 delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) &
820 (UHCI_NUMFRAMES - 1);
821 return frame_number + delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822}
823
824static const char hcd_name[] = "uhci_hcd";
825
826static const struct hc_driver uhci_driver = {
827 .description = hcd_name,
828 .product_desc = "UHCI Host Controller",
829 .hcd_priv_size = sizeof(struct uhci_hcd),
830
831 /* Generic hardware linkage */
832 .irq = uhci_irq,
833 .flags = HCD_USB11,
834
835 /* Basic lifecycle operations */
David Brownellbe3cbc52006-06-05 12:16:39 -0400836 .reset = uhci_init,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 .start = uhci_start,
838#ifdef CONFIG_PM
839 .suspend = uhci_suspend,
840 .resume = uhci_resume,
Alan Stern0c0382e2005-10-13 17:08:02 -0400841 .bus_suspend = uhci_rh_suspend,
842 .bus_resume = uhci_rh_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843#endif
844 .stop = uhci_stop,
845
846 .urb_enqueue = uhci_urb_enqueue,
847 .urb_dequeue = uhci_urb_dequeue,
848
849 .endpoint_disable = uhci_hcd_endpoint_disable,
850 .get_frame_number = uhci_hcd_get_frame_number,
851
852 .hub_status_data = uhci_hub_status_data,
853 .hub_control = uhci_hub_control,
854};
855
856static const struct pci_device_id uhci_pci_ids[] = { {
857 /* handle any USB UHCI controller */
Jean Delvarec67808e2006-04-09 20:07:35 +0200858 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 .driver_data = (unsigned long) &uhci_driver,
860 }, { /* end: all zeroes */ }
861};
862
863MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
864
865static struct pci_driver uhci_pci_driver = {
866 .name = (char *)hcd_name,
867 .id_table = uhci_pci_ids,
868
869 .probe = usb_hcd_pci_probe,
870 .remove = usb_hcd_pci_remove,
Alan Stern02597d22005-04-28 14:51:27 -0400871 .shutdown = uhci_shutdown,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873#ifdef CONFIG_PM
874 .suspend = usb_hcd_pci_suspend,
875 .resume = usb_hcd_pci_resume,
876#endif /* PM */
877};
878
879static int __init uhci_hcd_init(void)
880{
881 int retval = -ENOMEM;
882
883 printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "\n");
884
885 if (usb_disabled())
886 return -ENODEV;
887
Alan Stern8d402e12005-12-17 18:03:37 -0500888 if (DEBUG_CONFIGURED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
890 if (!errbuf)
891 goto errbuf_failed;
Alan Stern8d402e12005-12-17 18:03:37 -0500892 uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
893 if (!uhci_debugfs_root)
894 goto debug_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 }
896
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
898 sizeof(struct urb_priv), 0, 0, NULL, NULL);
899 if (!uhci_up_cachep)
900 goto up_failed;
901
902 retval = pci_register_driver(&uhci_pci_driver);
903 if (retval)
904 goto init_failed;
905
906 return 0;
907
908init_failed:
909 if (kmem_cache_destroy(uhci_up_cachep))
Alan Stern687f5f32005-11-30 17:16:19 -0500910 warn("not all urb_privs were freed!");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912up_failed:
913 debugfs_remove(uhci_debugfs_root);
914
915debug_failed:
Jesper Juhl1bc3c9e2005-04-18 17:39:34 -0700916 kfree(errbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
918errbuf_failed:
919
920 return retval;
921}
922
923static void __exit uhci_hcd_cleanup(void)
924{
925 pci_unregister_driver(&uhci_pci_driver);
926
927 if (kmem_cache_destroy(uhci_up_cachep))
Alan Stern687f5f32005-11-30 17:16:19 -0500928 warn("not all urb_privs were freed!");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
930 debugfs_remove(uhci_debugfs_root);
Jesper Juhl1bc3c9e2005-04-18 17:39:34 -0700931 kfree(errbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932}
933
934module_init(uhci_hcd_init);
935module_exit(uhci_hcd_cleanup);
936
937MODULE_AUTHOR(DRIVER_AUTHOR);
938MODULE_DESCRIPTION(DRIVER_DESC);
939MODULE_LICENSE("GPL");