2 * Universal Host Controller Interface driver for USB.
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
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)
16 * (C) Copyright 2004-2005 Alan Stern, stern@rowland.harvard.edu
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.
25 #include <linux/config.h>
26 #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>
34 #include <linux/smp_lock.h>
35 #include <linux/errno.h>
36 #include <linux/unistd.h>
37 #include <linux/interrupt.h>
38 #include <linux/spinlock.h>
39 #include <linux/debugfs.h>
41 #include <linux/dmapool.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/usb.h>
44 #include <linux/bitops.h>
46 #include <asm/uaccess.h>
49 #include <asm/system.h>
51 #include "../core/hcd.h"
57 #define DRIVER_VERSION "v2.3"
58 #define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \
59 Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
61 #define DRIVER_DESC "USB Universal Host Controller Interface driver"
64 * debug = 0, no debugging messages
65 * debug = 1, dump failed URBs except for stalls
66 * debug = 2, dump all failed URBs (including stalls)
67 * show all queues in /debug/uhci/[pci_addr]
68 * debug = 3, show all TDs in URBs when dumping
75 module_param(debug, int, S_IRUGO | S_IWUSR);
76 MODULE_PARM_DESC(debug, "Debug level");
78 #define ERRBUF_LEN (32 * 1024)
80 static kmem_cache_t *uhci_up_cachep; /* urb_priv */
82 static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
83 static void wakeup_rh(struct uhci_hcd *uhci);
84 static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
86 /* If a transfer is still active after this much time, turn off FSBR */
87 #define IDLE_TIMEOUT msecs_to_jiffies(50)
88 #define FSBR_DELAY msecs_to_jiffies(50)
90 /* When we timeout an idle transfer for FSBR, we'll switch it over to */
91 /* depth first traversal. We'll do it in groups of this number of TDs */
92 /* to make sure it doesn't hog all of the bandwidth */
93 #define DEPTH_INTERVAL 5
95 #include "uhci-debug.c"
99 extern void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
100 extern int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
103 * Finish up a host controller reset and update the recorded state.
105 static void finish_reset(struct uhci_hcd *uhci)
109 /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect
110 * bits in the port status and control registers.
111 * We have to clear them by hand.
113 for (port = 0; port < uhci->rh_numports; ++port)
114 outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
116 uhci->port_c_suspend = uhci->suspended_ports =
117 uhci->resuming_ports = 0;
118 uhci->rh_state = UHCI_RH_RESET;
119 uhci->is_stopped = UHCI_IS_STOPPED;
120 uhci_to_hcd(uhci)->state = HC_STATE_HALT;
121 uhci_to_hcd(uhci)->poll_rh = 0;
125 * Last rites for a defunct/nonfunctional controller
126 * or one we don't want to use any more.
128 static void hc_died(struct uhci_hcd *uhci)
130 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
132 uhci->hc_inaccessible = 1;
136 * Initialize a controller that was newly discovered or has just been
137 * resumed. In either case we can't be sure of its previous state.
139 static void check_and_reset_hc(struct uhci_hcd *uhci)
141 if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
146 * Store the basic register settings needed by the controller.
148 static void configure_hc(struct uhci_hcd *uhci)
150 /* Set the frame length to the default: 1 ms exactly */
151 outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
153 /* Store the frame list base address */
154 outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
156 /* Set the current frame number */
157 outw(uhci->frame_number, uhci->io_addr + USBFRNUM);
159 /* Mark controller as not halted before we enable interrupts */
160 uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
164 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
169 static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
173 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
177 case PCI_VENDOR_ID_GENESYS:
178 /* Genesys Logic's GL880S controllers don't generate
179 * resume-detect interrupts.
183 case PCI_VENDOR_ID_INTEL:
184 /* Some of Intel's USB controllers have a bug that causes
185 * resume-detect interrupts if any port has an over-current
186 * condition. To make matters worse, some motherboards
187 * hardwire unused USB ports' over-current inputs active!
188 * To prevent problems, we will not enable resume-detect
189 * interrupts if any ports are OC.
191 for (port = 0; port < uhci->rh_numports; ++port) {
192 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
201 static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
202 __releases(uhci->lock)
203 __acquires(uhci->lock)
208 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
209 dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
210 (auto_stop ? " (auto-stop)" : ""));
212 /* If we get a suspend request when we're already auto-stopped
213 * then there's nothing to do.
215 if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) {
216 uhci->rh_state = new_state;
220 /* Enable resume-detect interrupts if they work.
221 * Then enter Global Suspend mode, still configured.
223 uhci->working_RD = 1;
224 int_enable = USBINTR_RESUME;
225 if (resume_detect_interrupts_are_broken(uhci)) {
226 uhci->working_RD = int_enable = 0;
228 outw(int_enable, uhci->io_addr + USBINTR);
229 outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD);
233 /* If we're auto-stopping then no devices have been attached
234 * for a while, so there shouldn't be any active URBs and the
235 * controller should stop after a few microseconds. Otherwise
236 * we will give the controller one frame to stop.
238 if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
239 uhci->rh_state = UHCI_RH_SUSPENDING;
240 spin_unlock_irq(&uhci->lock);
242 spin_lock_irq(&uhci->lock);
243 if (uhci->hc_inaccessible) /* Died */
246 if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
247 dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
249 uhci_get_current_frame_number(uhci);
252 uhci->rh_state = new_state;
253 uhci->is_stopped = UHCI_IS_STOPPED;
254 uhci_to_hcd(uhci)->poll_rh = !int_enable;
256 uhci_scan_schedule(uhci, NULL);
259 static void start_rh(struct uhci_hcd *uhci)
261 uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
262 uhci->is_stopped = 0;
265 /* Mark it configured and running with a 64-byte max packet.
266 * All interrupts are enabled, even though RESUME won't do anything.
268 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
269 outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
270 uhci->io_addr + USBINTR);
272 uhci->rh_state = UHCI_RH_RUNNING;
273 uhci_to_hcd(uhci)->poll_rh = 1;
276 static void wakeup_rh(struct uhci_hcd *uhci)
277 __releases(uhci->lock)
278 __acquires(uhci->lock)
280 dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
281 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
282 " (auto-start)" : "");
284 /* If we are auto-stopped then no devices are attached so there's
285 * no need for wakeup signals. Otherwise we send Global Resume
288 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
289 uhci->rh_state = UHCI_RH_RESUMING;
290 outw(USBCMD_FGR | USBCMD_EGSM | USBCMD_CF,
291 uhci->io_addr + USBCMD);
292 spin_unlock_irq(&uhci->lock);
294 spin_lock_irq(&uhci->lock);
295 if (uhci->hc_inaccessible) /* Died */
298 /* End Global Resume and wait for EOP to be sent */
299 outw(USBCMD_CF, uhci->io_addr + USBCMD);
302 if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
303 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
308 /* Restart root hub polling */
309 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
312 static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
314 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
315 unsigned short status;
319 * Read the interrupt status, and write it back to clear the
320 * interrupt cause. Contrary to the UHCI specification, the
321 * "HC Halted" status bit is persistent: it is RO, not R/WC.
323 status = inw(uhci->io_addr + USBSTS);
324 if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */
326 outw(status, uhci->io_addr + USBSTS); /* Clear it */
328 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
329 if (status & USBSTS_HSE)
330 dev_err(uhci_dev(uhci), "host system error, "
332 if (status & USBSTS_HCPE)
333 dev_err(uhci_dev(uhci), "host controller process "
334 "error, something bad happened!\n");
335 if (status & USBSTS_HCH) {
336 spin_lock_irqsave(&uhci->lock, flags);
337 if (uhci->rh_state >= UHCI_RH_RUNNING) {
338 dev_err(uhci_dev(uhci),
339 "host controller halted, "
343 /* Force a callback in case there are
345 mod_timer(&hcd->rh_timer, jiffies);
347 spin_unlock_irqrestore(&uhci->lock, flags);
351 if (status & USBSTS_RD)
352 usb_hcd_poll_rh_status(hcd);
354 spin_lock_irqsave(&uhci->lock, flags);
355 uhci_scan_schedule(uhci, regs);
356 spin_unlock_irqrestore(&uhci->lock, flags);
363 * Store the current frame number in uhci->frame_number if the controller
366 static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
368 if (!uhci->is_stopped)
369 uhci->frame_number = inw(uhci->io_addr + USBFRNUM);
373 * De-allocate all resources
375 static void release_uhci(struct uhci_hcd *uhci)
379 for (i = 0; i < UHCI_NUM_SKELQH; i++)
380 uhci_free_qh(uhci, uhci->skelqh[i]);
382 uhci_free_td(uhci, uhci->term_td);
384 dma_pool_destroy(uhci->qh_pool);
386 dma_pool_destroy(uhci->td_pool);
388 kfree(uhci->frame_cpu);
390 dma_free_coherent(uhci_dev(uhci),
391 UHCI_NUMFRAMES * sizeof(*uhci->frame),
392 uhci->frame, uhci->frame_dma_handle);
394 debugfs_remove(uhci->dentry);
397 static int uhci_reset(struct usb_hcd *hcd)
399 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
400 unsigned io_size = (unsigned) hcd->rsrc_len;
403 uhci->io_addr = (unsigned long) hcd->rsrc_start;
405 /* The UHCI spec says devices must have 2 ports, and goes on to say
406 * they may have more but gives no way to determine how many there
407 * are. However according to the UHCI spec, Bit 7 of the port
408 * status and control register is always set to 1. So we try to
409 * use this to our advantage. Another common failure mode when
410 * a nonexistent register is addressed is to return all ones, so
411 * we test for that also.
413 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
414 unsigned int portstatus;
416 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
417 if (!(portstatus & 0x0080) || portstatus == 0xffff)
421 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
423 /* Anything greater than 7 is weird so we'll ignore it. */
424 if (port > UHCI_RH_MAXCHILD) {
425 dev_info(uhci_dev(uhci), "port count misdetected? "
426 "forcing to 2 ports\n");
429 uhci->rh_numports = port;
431 /* Kick BIOS off this hardware and reset if the controller
432 * isn't already safely quiescent.
434 check_and_reset_hc(uhci);
438 /* Make sure the controller is quiescent and that we're not using it
439 * any more. This is mainly for the benefit of programs which, like kexec,
440 * expect the hardware to be idle: not doing DMA or generating IRQs.
442 * This routine may be called in a damaged or failing kernel. Hence we
443 * do not acquire the spinlock before shutting down the controller.
445 static void uhci_shutdown(struct pci_dev *pdev)
447 struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
449 hc_died(hcd_to_uhci(hcd));
453 * Allocate a frame list, and then setup the skeleton
455 * The hardware doesn't really know any difference
456 * in the queues, but the order does matter for the
457 * protocols higher up. The order is:
459 * - any isochronous events handled before any
460 * of the queues. We don't do that here, because
461 * we'll create the actual TD entries on demand.
462 * - The first queue is the interrupt queue.
463 * - The second queue is the control queue, split into low- and full-speed
464 * - The third queue is bulk queue.
465 * - The fourth queue is the bandwidth reclamation queue, which loops back
466 * to the full-speed control queue.
468 static int uhci_start(struct usb_hcd *hcd)
470 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
473 struct dentry *dentry;
475 hcd->uses_new_polling = 1;
477 dentry = debugfs_create_file(hcd->self.bus_name,
478 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, uhci,
479 &uhci_debug_operations);
481 dev_err(uhci_dev(uhci),
482 "couldn't create uhci debugfs entry\n");
484 goto err_create_debug_entry;
486 uhci->dentry = dentry;
489 uhci->fsbrtimeout = 0;
491 spin_lock_init(&uhci->lock);
492 INIT_LIST_HEAD(&uhci->qh_remove_list);
494 INIT_LIST_HEAD(&uhci->td_remove_list);
496 INIT_LIST_HEAD(&uhci->urb_remove_list);
498 INIT_LIST_HEAD(&uhci->urb_list);
500 INIT_LIST_HEAD(&uhci->complete_list);
502 init_waitqueue_head(&uhci->waitqh);
504 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
505 UHCI_NUMFRAMES * sizeof(*uhci->frame),
506 &uhci->frame_dma_handle, 0);
508 dev_err(uhci_dev(uhci), "unable to allocate "
509 "consistent memory for frame list\n");
510 goto err_alloc_frame;
512 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
514 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
516 if (!uhci->frame_cpu) {
517 dev_err(uhci_dev(uhci), "unable to allocate "
518 "memory for frame pointers\n");
519 goto err_alloc_frame_cpu;
522 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
523 sizeof(struct uhci_td), 16, 0);
524 if (!uhci->td_pool) {
525 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
526 goto err_create_td_pool;
529 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
530 sizeof(struct uhci_qh), 16, 0);
531 if (!uhci->qh_pool) {
532 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
533 goto err_create_qh_pool;
536 uhci->term_td = uhci_alloc_td(uhci);
537 if (!uhci->term_td) {
538 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
539 goto err_alloc_term_td;
542 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
543 uhci->skelqh[i] = uhci_alloc_qh(uhci);
544 if (!uhci->skelqh[i]) {
545 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
546 goto err_alloc_skelqh;
551 * 8 Interrupt queues; link all higher int queues to int1,
552 * then link int1 to control and control to bulk
554 uhci->skel_int128_qh->link =
555 uhci->skel_int64_qh->link =
556 uhci->skel_int32_qh->link =
557 uhci->skel_int16_qh->link =
558 uhci->skel_int8_qh->link =
559 uhci->skel_int4_qh->link =
560 uhci->skel_int2_qh->link =
561 cpu_to_le32(uhci->skel_int1_qh->dma_handle) | UHCI_PTR_QH;
562 uhci->skel_int1_qh->link = cpu_to_le32(uhci->skel_ls_control_qh->dma_handle) | UHCI_PTR_QH;
564 uhci->skel_ls_control_qh->link = cpu_to_le32(uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH;
565 uhci->skel_fs_control_qh->link = cpu_to_le32(uhci->skel_bulk_qh->dma_handle) | UHCI_PTR_QH;
566 uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) | UHCI_PTR_QH;
568 /* This dummy TD is to work around a bug in Intel PIIX controllers */
569 uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
570 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
571 uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
573 uhci->skel_term_qh->link = UHCI_PTR_TERM;
574 uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
577 * Fill the frame list: make all entries point to the proper
580 * The interrupt queues will be interleaved as evenly as possible.
581 * There's not much to be done about period-1 interrupts; they have
582 * to occur in every frame. But we can schedule period-2 interrupts
583 * in odd-numbered frames, period-4 interrupts in frames congruent
584 * to 2 (mod 4), and so on. This way each frame only has two
585 * interrupt QHs, which will help spread out bandwidth utilization.
587 for (i = 0; i < UHCI_NUMFRAMES; i++) {
591 * ffs (Find First bit Set) does exactly what we need:
592 * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[6],
593 * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[5], etc.
594 * ffs > 6 => not on any high-period queue, so use
595 * skel_int1_qh = skelqh[7].
596 * Add UHCI_NUMFRAMES to insure at least one bit is set.
598 irq = 6 - (int) __ffs(i + UHCI_NUMFRAMES);
602 /* Only place we don't use the frame list routines */
603 uhci->frame[i] = UHCI_PTR_QH |
604 cpu_to_le32(uhci->skelqh[irq]->dma_handle);
608 * Some architectures require a full mb() to enforce completion of
609 * the memory writes above before the I/O transfers in configure_hc().
621 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
623 uhci_free_qh(uhci, uhci->skelqh[i]);
626 uhci_free_td(uhci, uhci->term_td);
629 dma_pool_destroy(uhci->qh_pool);
632 dma_pool_destroy(uhci->td_pool);
635 kfree(uhci->frame_cpu);
638 dma_free_coherent(uhci_dev(uhci),
639 UHCI_NUMFRAMES * sizeof(*uhci->frame),
640 uhci->frame, uhci->frame_dma_handle);
643 debugfs_remove(uhci->dentry);
645 err_create_debug_entry:
649 static void uhci_stop(struct usb_hcd *hcd)
651 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
653 spin_lock_irq(&uhci->lock);
654 if (!uhci->hc_inaccessible)
656 uhci_scan_schedule(uhci, NULL);
657 spin_unlock_irq(&uhci->lock);
663 static int uhci_rh_suspend(struct usb_hcd *hcd)
665 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
667 spin_lock_irq(&uhci->lock);
668 if (!uhci->hc_inaccessible) /* Not dead */
669 suspend_rh(uhci, UHCI_RH_SUSPENDED);
670 spin_unlock_irq(&uhci->lock);
674 static int uhci_rh_resume(struct usb_hcd *hcd)
676 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
679 spin_lock_irq(&uhci->lock);
680 if (uhci->hc_inaccessible) {
681 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
682 dev_warn(uhci_dev(uhci), "HC isn't running!\n");
685 /* Otherwise the HC is dead */
688 spin_unlock_irq(&uhci->lock);
692 static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
694 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
697 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
699 spin_lock_irq(&uhci->lock);
700 if (uhci->hc_inaccessible) /* Dead or already suspended */
703 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
704 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
709 /* All PCI host controllers are required to disable IRQ generation
710 * at the source, so we must turn off PIRQ.
712 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
714 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
715 uhci->hc_inaccessible = 1;
718 /* FIXME: Enable non-PME# remote wakeup? */
721 spin_unlock_irq(&uhci->lock);
725 static int uhci_resume(struct usb_hcd *hcd)
727 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
729 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
731 /* Since we aren't in D3 any more, it's safe to set this flag
732 * even if the controller was dead. It might not even be dead
733 * any more, if the firmware or quirks code has reset it.
735 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
738 if (uhci->rh_state == UHCI_RH_RESET) /* Dead */
740 spin_lock_irq(&uhci->lock);
742 /* FIXME: Disable non-PME# remote wakeup? */
744 uhci->hc_inaccessible = 0;
746 /* The BIOS may have changed the controller settings during a
747 * system wakeup. Check it and reconfigure to avoid problems.
749 check_and_reset_hc(uhci);
752 if (uhci->rh_state == UHCI_RH_RESET) {
754 /* The controller had to be reset */
755 usb_root_hub_lost_power(hcd->self.root_hub);
756 suspend_rh(uhci, UHCI_RH_SUSPENDED);
759 spin_unlock_irq(&uhci->lock);
761 if (!uhci->working_RD) {
762 /* Suspended root hub needs to be polled */
764 usb_hcd_poll_rh_status(hcd);
770 /* Wait until all the URBs for a particular device/endpoint are gone */
771 static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
772 struct usb_host_endpoint *ep)
774 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
776 wait_event_interruptible(uhci->waitqh, list_empty(&ep->urb_list));
779 static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
781 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
786 /* Minimize latency by avoiding the spinlock */
787 local_irq_save(flags);
788 is_stopped = uhci->is_stopped;
790 frame_number = (is_stopped ? uhci->frame_number :
791 inw(uhci->io_addr + USBFRNUM));
792 local_irq_restore(flags);
796 static const char hcd_name[] = "uhci_hcd";
798 static const struct hc_driver uhci_driver = {
799 .description = hcd_name,
800 .product_desc = "UHCI Host Controller",
801 .hcd_priv_size = sizeof(struct uhci_hcd),
803 /* Generic hardware linkage */
807 /* Basic lifecycle operations */
811 .suspend = uhci_suspend,
812 .resume = uhci_resume,
813 .bus_suspend = uhci_rh_suspend,
814 .bus_resume = uhci_rh_resume,
818 .urb_enqueue = uhci_urb_enqueue,
819 .urb_dequeue = uhci_urb_dequeue,
821 .endpoint_disable = uhci_hcd_endpoint_disable,
822 .get_frame_number = uhci_hcd_get_frame_number,
824 .hub_status_data = uhci_hub_status_data,
825 .hub_control = uhci_hub_control,
828 static const struct pci_device_id uhci_pci_ids[] = { {
829 /* handle any USB UHCI controller */
830 PCI_DEVICE_CLASS(((PCI_CLASS_SERIAL_USB << 8) | 0x00), ~0),
831 .driver_data = (unsigned long) &uhci_driver,
832 }, { /* end: all zeroes */ }
835 MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
837 static struct pci_driver uhci_pci_driver = {
838 .name = (char *)hcd_name,
839 .id_table = uhci_pci_ids,
841 .probe = usb_hcd_pci_probe,
842 .remove = usb_hcd_pci_remove,
843 .shutdown = uhci_shutdown,
846 .suspend = usb_hcd_pci_suspend,
847 .resume = usb_hcd_pci_resume,
851 static int __init uhci_hcd_init(void)
853 int retval = -ENOMEM;
855 printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "\n");
861 errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
866 uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
867 if (!uhci_debugfs_root)
870 uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
871 sizeof(struct urb_priv), 0, 0, NULL, NULL);
875 retval = pci_register_driver(&uhci_pci_driver);
882 if (kmem_cache_destroy(uhci_up_cachep))
883 warn("not all urb_privs were freed!");
886 debugfs_remove(uhci_debugfs_root);
896 static void __exit uhci_hcd_cleanup(void)
898 pci_unregister_driver(&uhci_pci_driver);
900 if (kmem_cache_destroy(uhci_up_cachep))
901 warn("not all urb_privs were freed!");
903 debugfs_remove(uhci_debugfs_root);
907 module_init(uhci_hcd_init);
908 module_exit(uhci_hcd_cleanup);
910 MODULE_AUTHOR(DRIVER_AUTHOR);
911 MODULE_DESCRIPTION(DRIVER_DESC);
912 MODULE_LICENSE("GPL");