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 #ifdef CONFIG_USB_DEBUG
31 #include <linux/module.h>
32 #include <linux/pci.h>
33 #include <linux/kernel.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
36 #include <linux/ioport.h>
37 #include <linux/sched.h>
38 #include <linux/slab.h>
39 #include <linux/smp_lock.h>
40 #include <linux/errno.h>
41 #include <linux/unistd.h>
42 #include <linux/interrupt.h>
43 #include <linux/spinlock.h>
44 #include <linux/debugfs.h>
46 #include <linux/dmapool.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/usb.h>
49 #include <linux/bitops.h>
51 #include <asm/uaccess.h>
54 #include <asm/system.h>
56 #include "../core/hcd.h"
62 #define DRIVER_VERSION "v2.3"
63 #define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \
64 Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
66 #define DRIVER_DESC "USB Universal Host Controller Interface driver"
69 * debug = 0, no debugging messages
70 * debug = 1, dump failed URB's except for stalls
71 * debug = 2, dump all failed URB's (including stalls)
72 * show all queues in /debug/uhci/[pci_addr]
73 * debug = 3, show all TD's in URB's when dumping
80 module_param(debug, int, S_IRUGO | S_IWUSR);
81 MODULE_PARM_DESC(debug, "Debug level");
83 #define ERRBUF_LEN (32 * 1024)
85 static kmem_cache_t *uhci_up_cachep; /* urb_priv */
87 static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
88 static void wakeup_rh(struct uhci_hcd *uhci);
89 static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
91 /* If a transfer is still active after this much time, turn off FSBR */
92 #define IDLE_TIMEOUT msecs_to_jiffies(50)
93 #define FSBR_DELAY msecs_to_jiffies(50)
95 /* When we timeout an idle transfer for FSBR, we'll switch it over to */
96 /* depth first traversal. We'll do it in groups of this number of TD's */
97 /* to make sure it doesn't hog all of the bandwidth */
98 #define DEPTH_INTERVAL 5
100 #include "uhci-debug.c"
102 #include "uhci-hub.c"
104 extern void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
105 extern int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
108 * Finish up a host controller reset and update the recorded state.
110 static void finish_reset(struct uhci_hcd *uhci)
114 /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect
115 * bits in the port status and control registers.
116 * We have to clear them by hand.
118 for (port = 0; port < uhci->rh_numports; ++port)
119 outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
121 uhci->port_c_suspend = uhci->suspended_ports =
122 uhci->resuming_ports = 0;
123 uhci->rh_state = UHCI_RH_RESET;
124 uhci->is_stopped = UHCI_IS_STOPPED;
125 uhci_to_hcd(uhci)->state = HC_STATE_HALT;
126 uhci_to_hcd(uhci)->poll_rh = 0;
130 * Last rites for a defunct/nonfunctional controller
131 * or one we don't want to use any more.
133 static void hc_died(struct uhci_hcd *uhci)
135 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
137 uhci->hc_inaccessible = 1;
141 * Initialize a controller that was newly discovered or has just been
142 * resumed. In either case we can't be sure of its previous state.
144 static void check_and_reset_hc(struct uhci_hcd *uhci)
146 if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
151 * Store the basic register settings needed by the controller.
153 static void configure_hc(struct uhci_hcd *uhci)
155 /* Set the frame length to the default: 1 ms exactly */
156 outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
158 /* Store the frame list base address */
159 outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
161 /* Set the current frame number */
162 outw(uhci->frame_number, uhci->io_addr + USBFRNUM);
164 /* Mark controller as not halted before we enable interrupts */
165 uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
169 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
174 static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
178 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
182 case PCI_VENDOR_ID_GENESYS:
183 /* Genesys Logic's GL880S controllers don't generate
184 * resume-detect interrupts.
188 case PCI_VENDOR_ID_INTEL:
189 /* Some of Intel's USB controllers have a bug that causes
190 * resume-detect interrupts if any port has an over-current
191 * condition. To make matters worse, some motherboards
192 * hardwire unused USB ports' over-current inputs active!
193 * To prevent problems, we will not enable resume-detect
194 * interrupts if any ports are OC.
196 for (port = 0; port < uhci->rh_numports; ++port) {
197 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
206 static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
207 __releases(uhci->lock)
208 __acquires(uhci->lock)
213 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
214 dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
215 (auto_stop ? " (auto-stop)" : ""));
217 /* If we get a suspend request when we're already auto-stopped
218 * then there's nothing to do.
220 if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) {
221 uhci->rh_state = new_state;
225 /* Enable resume-detect interrupts if they work.
226 * Then enter Global Suspend mode, still configured.
228 uhci->working_RD = 1;
229 int_enable = USBINTR_RESUME;
230 if (resume_detect_interrupts_are_broken(uhci)) {
231 uhci->working_RD = int_enable = 0;
233 outw(int_enable, uhci->io_addr + USBINTR);
234 outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD);
238 /* If we're auto-stopping then no devices have been attached
239 * for a while, so there shouldn't be any active URBs and the
240 * controller should stop after a few microseconds. Otherwise
241 * we will give the controller one frame to stop.
243 if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
244 uhci->rh_state = UHCI_RH_SUSPENDING;
245 spin_unlock_irq(&uhci->lock);
247 spin_lock_irq(&uhci->lock);
248 if (uhci->hc_inaccessible) /* Died */
251 if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
252 dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
254 uhci_get_current_frame_number(uhci);
257 uhci->rh_state = new_state;
258 uhci->is_stopped = UHCI_IS_STOPPED;
259 uhci_to_hcd(uhci)->poll_rh = !int_enable;
261 uhci_scan_schedule(uhci, NULL);
264 static void start_rh(struct uhci_hcd *uhci)
266 uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
267 uhci->is_stopped = 0;
270 /* Mark it configured and running with a 64-byte max packet.
271 * All interrupts are enabled, even though RESUME won't do anything.
273 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
274 outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
275 uhci->io_addr + USBINTR);
277 uhci->rh_state = UHCI_RH_RUNNING;
278 uhci_to_hcd(uhci)->poll_rh = 1;
281 static void wakeup_rh(struct uhci_hcd *uhci)
282 __releases(uhci->lock)
283 __acquires(uhci->lock)
285 dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
286 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
287 " (auto-start)" : "");
289 /* If we are auto-stopped then no devices are attached so there's
290 * no need for wakeup signals. Otherwise we send Global Resume
293 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
294 uhci->rh_state = UHCI_RH_RESUMING;
295 outw(USBCMD_FGR | USBCMD_EGSM | USBCMD_CF,
296 uhci->io_addr + USBCMD);
297 spin_unlock_irq(&uhci->lock);
299 spin_lock_irq(&uhci->lock);
300 if (uhci->hc_inaccessible) /* Died */
303 /* End Global Resume and wait for EOP to be sent */
304 outw(USBCMD_CF, uhci->io_addr + USBCMD);
307 if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
308 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
313 /* Restart root hub polling */
314 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
317 static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
319 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
320 unsigned short status;
324 * Read the interrupt status, and write it back to clear the
325 * interrupt cause. Contrary to the UHCI specification, the
326 * "HC Halted" status bit is persistent: it is RO, not R/WC.
328 status = inw(uhci->io_addr + USBSTS);
329 if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */
331 outw(status, uhci->io_addr + USBSTS); /* Clear it */
333 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
334 if (status & USBSTS_HSE)
335 dev_err(uhci_dev(uhci), "host system error, "
337 if (status & USBSTS_HCPE)
338 dev_err(uhci_dev(uhci), "host controller process "
339 "error, something bad happened!\n");
340 if (status & USBSTS_HCH) {
341 spin_lock_irqsave(&uhci->lock, flags);
342 if (uhci->rh_state >= UHCI_RH_RUNNING) {
343 dev_err(uhci_dev(uhci),
344 "host controller halted, "
348 /* Force a callback in case there are
350 mod_timer(&hcd->rh_timer, jiffies);
352 spin_unlock_irqrestore(&uhci->lock, flags);
356 if (status & USBSTS_RD)
357 usb_hcd_poll_rh_status(hcd);
359 spin_lock_irqsave(&uhci->lock, flags);
360 uhci_scan_schedule(uhci, regs);
361 spin_unlock_irqrestore(&uhci->lock, flags);
368 * Store the current frame number in uhci->frame_number if the controller
371 static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
373 if (!uhci->is_stopped)
374 uhci->frame_number = inw(uhci->io_addr + USBFRNUM);
378 * De-allocate all resources
380 static void release_uhci(struct uhci_hcd *uhci)
384 for (i = 0; i < UHCI_NUM_SKELQH; i++)
385 uhci_free_qh(uhci, uhci->skelqh[i]);
387 uhci_free_td(uhci, uhci->term_td);
389 dma_pool_destroy(uhci->qh_pool);
391 dma_pool_destroy(uhci->td_pool);
393 kfree(uhci->frame_cpu);
395 dma_free_coherent(uhci_dev(uhci),
396 UHCI_NUMFRAMES * sizeof(*uhci->frame),
397 uhci->frame, uhci->frame_dma_handle);
399 debugfs_remove(uhci->dentry);
402 static int uhci_reset(struct usb_hcd *hcd)
404 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
405 unsigned io_size = (unsigned) hcd->rsrc_len;
408 uhci->io_addr = (unsigned long) hcd->rsrc_start;
410 /* The UHCI spec says devices must have 2 ports, and goes on to say
411 * they may have more but gives no way to determine how many there
412 * are. However according to the UHCI spec, Bit 7 of the port
413 * status and control register is always set to 1. So we try to
414 * use this to our advantage. Another common failure mode when
415 * a nonexistent register is addressed is to return all ones, so
416 * we test for that also.
418 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
419 unsigned int portstatus;
421 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
422 if (!(portstatus & 0x0080) || portstatus == 0xffff)
426 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
428 /* Anything greater than 7 is weird so we'll ignore it. */
429 if (port > UHCI_RH_MAXCHILD) {
430 dev_info(uhci_dev(uhci), "port count misdetected? "
431 "forcing to 2 ports\n");
434 uhci->rh_numports = port;
436 /* Kick BIOS off this hardware and reset if the controller
437 * isn't already safely quiescent.
439 check_and_reset_hc(uhci);
443 /* Make sure the controller is quiescent and that we're not using it
444 * any more. This is mainly for the benefit of programs which, like kexec,
445 * expect the hardware to be idle: not doing DMA or generating IRQs.
447 * This routine may be called in a damaged or failing kernel. Hence we
448 * do not acquire the spinlock before shutting down the controller.
450 static void uhci_shutdown(struct pci_dev *pdev)
452 struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
454 hc_died(hcd_to_uhci(hcd));
458 * Allocate a frame list, and then setup the skeleton
460 * The hardware doesn't really know any difference
461 * in the queues, but the order does matter for the
462 * protocols higher up. The order is:
464 * - any isochronous events handled before any
465 * of the queues. We don't do that here, because
466 * we'll create the actual TD entries on demand.
467 * - The first queue is the interrupt queue.
468 * - The second queue is the control queue, split into low- and full-speed
469 * - The third queue is bulk queue.
470 * - The fourth queue is the bandwidth reclamation queue, which loops back
471 * to the full-speed control queue.
473 static int uhci_start(struct usb_hcd *hcd)
475 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
478 struct dentry *dentry;
480 hcd->uses_new_polling = 1;
481 if (pci_find_capability(to_pci_dev(uhci_dev(uhci)), PCI_CAP_ID_PM))
482 hcd->can_wakeup = 1; /* Assume it supports PME# */
484 dentry = debugfs_create_file(hcd->self.bus_name,
485 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, uhci,
486 &uhci_debug_operations);
488 dev_err(uhci_dev(uhci),
489 "couldn't create uhci debugfs entry\n");
491 goto err_create_debug_entry;
493 uhci->dentry = dentry;
496 uhci->fsbrtimeout = 0;
498 spin_lock_init(&uhci->lock);
499 INIT_LIST_HEAD(&uhci->qh_remove_list);
501 INIT_LIST_HEAD(&uhci->td_remove_list);
503 INIT_LIST_HEAD(&uhci->urb_remove_list);
505 INIT_LIST_HEAD(&uhci->urb_list);
507 INIT_LIST_HEAD(&uhci->complete_list);
509 init_waitqueue_head(&uhci->waitqh);
511 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
512 UHCI_NUMFRAMES * sizeof(*uhci->frame),
513 &uhci->frame_dma_handle, 0);
515 dev_err(uhci_dev(uhci), "unable to allocate "
516 "consistent memory for frame list\n");
517 goto err_alloc_frame;
519 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
521 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
523 if (!uhci->frame_cpu) {
524 dev_err(uhci_dev(uhci), "unable to allocate "
525 "memory for frame pointers\n");
526 goto err_alloc_frame_cpu;
529 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
530 sizeof(struct uhci_td), 16, 0);
531 if (!uhci->td_pool) {
532 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
533 goto err_create_td_pool;
536 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
537 sizeof(struct uhci_qh), 16, 0);
538 if (!uhci->qh_pool) {
539 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
540 goto err_create_qh_pool;
543 uhci->term_td = uhci_alloc_td(uhci);
544 if (!uhci->term_td) {
545 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
546 goto err_alloc_term_td;
549 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
550 uhci->skelqh[i] = uhci_alloc_qh(uhci);
551 if (!uhci->skelqh[i]) {
552 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
553 goto err_alloc_skelqh;
558 * 8 Interrupt queues; link all higher int queues to int1,
559 * then link int1 to control and control to bulk
561 uhci->skel_int128_qh->link =
562 uhci->skel_int64_qh->link =
563 uhci->skel_int32_qh->link =
564 uhci->skel_int16_qh->link =
565 uhci->skel_int8_qh->link =
566 uhci->skel_int4_qh->link =
567 uhci->skel_int2_qh->link =
568 cpu_to_le32(uhci->skel_int1_qh->dma_handle) | UHCI_PTR_QH;
569 uhci->skel_int1_qh->link = cpu_to_le32(uhci->skel_ls_control_qh->dma_handle) | UHCI_PTR_QH;
571 uhci->skel_ls_control_qh->link = cpu_to_le32(uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH;
572 uhci->skel_fs_control_qh->link = cpu_to_le32(uhci->skel_bulk_qh->dma_handle) | UHCI_PTR_QH;
573 uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) | UHCI_PTR_QH;
575 /* This dummy TD is to work around a bug in Intel PIIX controllers */
576 uhci_fill_td(uhci->term_td, 0, (UHCI_NULL_DATA_SIZE << 21) |
577 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
578 uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
580 uhci->skel_term_qh->link = UHCI_PTR_TERM;
581 uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
584 * Fill the frame list: make all entries point to the proper
587 * The interrupt queues will be interleaved as evenly as possible.
588 * There's not much to be done about period-1 interrupts; they have
589 * to occur in every frame. But we can schedule period-2 interrupts
590 * in odd-numbered frames, period-4 interrupts in frames congruent
591 * to 2 (mod 4), and so on. This way each frame only has two
592 * interrupt QHs, which will help spread out bandwidth utilization.
594 for (i = 0; i < UHCI_NUMFRAMES; i++) {
598 * ffs (Find First bit Set) does exactly what we need:
599 * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[6],
600 * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[5], etc.
601 * ffs > 6 => not on any high-period queue, so use
602 * skel_int1_qh = skelqh[7].
603 * Add UHCI_NUMFRAMES to insure at least one bit is set.
605 irq = 6 - (int) __ffs(i + UHCI_NUMFRAMES);
609 /* Only place we don't use the frame list routines */
610 uhci->frame[i] = UHCI_PTR_QH |
611 cpu_to_le32(uhci->skelqh[irq]->dma_handle);
615 * Some architectures require a full mb() to enforce completion of
616 * the memory writes above before the I/O transfers in configure_hc().
628 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
630 uhci_free_qh(uhci, uhci->skelqh[i]);
633 uhci_free_td(uhci, uhci->term_td);
636 dma_pool_destroy(uhci->qh_pool);
639 dma_pool_destroy(uhci->td_pool);
642 kfree(uhci->frame_cpu);
645 dma_free_coherent(uhci_dev(uhci),
646 UHCI_NUMFRAMES * sizeof(*uhci->frame),
647 uhci->frame, uhci->frame_dma_handle);
650 debugfs_remove(uhci->dentry);
652 err_create_debug_entry:
656 static void uhci_stop(struct usb_hcd *hcd)
658 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
660 spin_lock_irq(&uhci->lock);
661 if (!uhci->hc_inaccessible)
663 uhci_scan_schedule(uhci, NULL);
664 spin_unlock_irq(&uhci->lock);
670 static int uhci_rh_suspend(struct usb_hcd *hcd)
672 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
674 spin_lock_irq(&uhci->lock);
675 if (!uhci->hc_inaccessible) /* Not dead */
676 suspend_rh(uhci, UHCI_RH_SUSPENDED);
677 spin_unlock_irq(&uhci->lock);
681 static int uhci_rh_resume(struct usb_hcd *hcd)
683 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
686 spin_lock_irq(&uhci->lock);
687 if (uhci->hc_inaccessible) {
688 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
689 dev_warn(uhci_dev(uhci), "HC isn't running!\n");
692 /* Otherwise the HC is dead */
695 spin_unlock_irq(&uhci->lock);
699 static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
701 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
704 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
706 spin_lock_irq(&uhci->lock);
707 if (uhci->hc_inaccessible) /* Dead or already suspended */
710 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
711 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
716 /* All PCI host controllers are required to disable IRQ generation
717 * at the source, so we must turn off PIRQ.
719 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
720 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
721 uhci->hc_inaccessible = 1;
724 /* FIXME: Enable non-PME# remote wakeup? */
727 spin_unlock_irq(&uhci->lock);
731 static int uhci_resume(struct usb_hcd *hcd)
733 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
735 dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
737 /* We aren't in D3 state anymore, we do that even if dead as I
738 * really don't want to keep a stale HCD_FLAG_HW_ACCESSIBLE=0
740 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
742 if (uhci->rh_state == UHCI_RH_RESET) /* Dead */
744 spin_lock_irq(&uhci->lock);
746 /* FIXME: Disable non-PME# remote wakeup? */
748 uhci->hc_inaccessible = 0;
750 /* The BIOS may have changed the controller settings during a
751 * system wakeup. Check it and reconfigure to avoid problems.
753 check_and_reset_hc(uhci);
756 if (uhci->rh_state == UHCI_RH_RESET)
757 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_priv's 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_priv's 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");