WebSVN - shark - Blame - Rev 1049 - /shark/trunk/drivers/usb/host/uhci-hcd.c

Rev	Author	Line No.	Line
1049	mauro	1	/*
		2	* Universal Host Controller Interface driver for USB.
		3	*
		4	* Maintainer: Johannes Erdfelt <johannes@erdfelt.com>
		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)
		16	*
		17	* Intel documents this fairly well, and as far as I know there
		18	* are no royalties or anything like that, but even so there are
		19	* people who decided that they want to do the same thing in a
		20	* completely different way.
		21	*
		22	* WARNING! The USB documentation is downright evil. Most of it
		23	* is just crap, written by a committee. You're better off ignoring
		24	* most of it, the important stuff is:
		25	* - the low-level protocol (fairly simple but lots of small details)
		26	* - working around the horridness of the rest
		27	*/
		28
		29	#include <linuxcomp.h>
		30
		31	#include <linux/config.h>
		32	#include <linux/module.h>
		33	#include <linux/pci.h>
		34	#include <linux/kernel.h>
		35	#include <linux/init.h>
		36	#include <linux/delay.h>
		37	#include <linux/ioport.h>
		38	#include <linux/sched.h>
		39	#include <linux/slab.h>
		40	#include <linux/smp_lock.h>
		41	#include <linux/errno.h>
		42	#include <linux/unistd.h>
		43	#include <linux/interrupt.h>
		44	#include <linux/spinlock.h>
		45	#include <linux/proc_fs.h>
		46	#ifdef CONFIG_USB_DEBUG
		47	#define DEBUG
		48	#else
		49	#undef DEBUG
		50	#endif
		51	#include <linux/usb.h>
		52
		53	#include <asm/uaccess.h>
		54	#include <asm/io.h>
		55	#include <asm/irq.h>
		56	#include <asm/system.h>
		57
		58	#include "../core/hcd.h"
		59	#include "uhci-hcd.h"
		60
		61	#include <linux/pm.h>
		62
		63	/*
		64	* Version Information
		65	*/
		66	#define DRIVER_VERSION "v2.1"
		67	#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber"
		68	#define DRIVER_DESC "USB Universal Host Controller Interface driver"
		69
		70	/*
		71	* debug = 0, no debugging messages
		72	* debug = 1, dump failed URB's except for stalls
		73	* debug = 2, dump all failed URB's (including stalls)
		74	* show all queues in /proc/driver/uhci/[pci_addr]
		75	* debug = 3, show all TD's in URB's when dumping
		76	*/
		77	#ifdef DEBUG
		78	static int debug = 3;
		79	#else
		80	static int debug = 0;
		81	#endif
		82	MODULE_PARM(debug, "i");
		83	MODULE_PARM_DESC(debug, "Debug level");
		84	static char *errbuf;
		85	#define ERRBUF_LEN (PAGE_SIZE * 8)
		86
		87	#include "uhci-hub.c"
		88	#include "uhci-debug.c"
		89
		90	static kmem_cache_t uhci_up_cachep; / urb_priv */
		91
		92	static int uhci_get_current_frame_number(struct uhci_hcd *uhci);
		93	static int uhci_urb_dequeue(struct usb_hcd hcd, struct urb urb);
		94	static void uhci_unlink_generic(struct uhci_hcd uhci, struct urb urb);
		95
		96	static void hc_state_transitions(struct uhci_hcd *uhci);
		97
		98	/* If a transfer is still active after this much time, turn off FSBR */
		99	#define IDLE_TIMEOUT (HZ / 20) /* 50 ms */
		100	#define FSBR_DELAY (HZ / 20) /* 50 ms */
		101
		102	/* When we timeout an idle transfer for FSBR, we'll switch it over to */
		103	/* depth first traversal. We'll do it in groups of this number of TD's */
		104	/* to make sure it doesn't hog all of the bandwidth */
		105	#define DEPTH_INTERVAL 5
		106
		107	/*
		108	* Technically, updating td->status here is a race, but it's not really a
		109	* problem. The worst that can happen is that we set the IOC bit again
		110	* generating a spurious interrupt. We could fix this by creating another
		111	* QH and leaving the IOC bit always set, but then we would have to play
		112	* games with the FSBR code to make sure we get the correct order in all
		113	* the cases. I don't think it's worth the effort
		114	*/
		115	static inline void uhci_set_next_interrupt(struct uhci_hcd *uhci)
		116	{
		117	unsigned long flags;
		118
		119	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		120	uhci->term_td->status \|= cpu_to_le32(TD_CTRL_IOC);
		121	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		122	}
		123
		124	static inline void uhci_clear_next_interrupt(struct uhci_hcd *uhci)
		125	{
		126	unsigned long flags;
		127
		128	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		129	uhci->term_td->status &= ~cpu_to_le32(TD_CTRL_IOC);
		130	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		131	}
		132
		133	static inline void uhci_add_complete(struct uhci_hcd uhci, struct urb urb)
		134	{
		135	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		136	unsigned long flags;
		137
		138	spin_lock_irqsave(&uhci->complete_list_lock, flags);
		139	list_add_tail(&urbp->complete_list, &uhci->complete_list);
		140	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
		141	}
		142
		143	static struct uhci_td uhci_alloc_td(struct uhci_hcd uhci, struct usb_device *dev)
		144	{
		145	dma_addr_t dma_handle;
		146	struct uhci_td *td;
		147
		148	td = pci_pool_alloc_usb(uhci->td_pool, GFP_ATOMIC, &dma_handle);
		149	if (!td)
		150	return NULL;
		151
		152	td->dma_handle = dma_handle;
		153
		154	td->link = UHCI_PTR_TERM;
		155	td->buffer = 0;
		156
		157	td->frame = -1;
		158	td->dev = dev;
		159
		160	INIT_LIST_HEAD(&td->list);
		161	INIT_LIST_HEAD(&td->remove_list);
		162	INIT_LIST_HEAD(&td->fl_list);
		163
		164	usb_get_dev(dev);
		165
		166	return td;
		167	}
		168
		169	static inline void uhci_fill_td(struct uhci_td *td, __u32 status,
		170	__u32 token, __u32 buffer)
		171	{
		172	td->status = cpu_to_le32(status);
		173	td->token = cpu_to_le32(token);
		174	td->buffer = cpu_to_le32(buffer);
		175	}
		176
		177	/*
		178	* We insert Isochronous URB's directly into the frame list at the beginning
		179	*/
		180	static void uhci_insert_td_frame_list(struct uhci_hcd uhci, struct uhci_td td, unsigned framenum)
		181	{
		182	unsigned long flags;
		183
		184	framenum %= UHCI_NUMFRAMES;
		185
		186	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		187
		188	td->frame = framenum;
		189
		190	/* Is there a TD already mapped there? */
		191	if (uhci->fl->frame_cpu[framenum]) {
		192	struct uhci_td ftd, ltd;
		193
		194	ftd = uhci->fl->frame_cpu[framenum];
		195	ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
		196
		197	list_add_tail(&td->fl_list, &ftd->fl_list);
		198
		199	td->link = ltd->link;
		200	mb();
		201	ltd->link = cpu_to_le32(td->dma_handle);
		202	} else {
		203	td->link = uhci->fl->frame[framenum];
		204	mb();
		205	uhci->fl->frame[framenum] = cpu_to_le32(td->dma_handle);
		206	uhci->fl->frame_cpu[framenum] = td;
		207	}
		208
		209	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		210	}
		211
		212	static void uhci_remove_td(struct uhci_hcd uhci, struct uhci_td td)
		213	{
		214	unsigned long flags;
		215
		216	/* If it's not inserted, don't remove it */
		217	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		218	if (td->frame == -1 && list_empty(&td->fl_list))
		219	goto out;
		220
		221	if (td->frame != -1 && uhci->fl->frame_cpu[td->frame] == td) {
		222	if (list_empty(&td->fl_list)) {
		223	uhci->fl->frame[td->frame] = td->link;
		224	uhci->fl->frame_cpu[td->frame] = NULL;
		225	} else {
		226	struct uhci_td *ntd;
		227
		228	ntd = list_entry(td->fl_list.next, struct uhci_td, fl_list);
		229	uhci->fl->frame[td->frame] = cpu_to_le32(ntd->dma_handle);
		230	uhci->fl->frame_cpu[td->frame] = ntd;
		231	}
		232	} else {
		233	struct uhci_td *ptd;
		234
		235	ptd = list_entry(td->fl_list.prev, struct uhci_td, fl_list);
		236	ptd->link = td->link;
		237	}
		238
		239	mb();
		240	td->link = UHCI_PTR_TERM;
		241
		242	list_del_init(&td->fl_list);
		243	td->frame = -1;
		244
		245	out:
		246	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		247	}
		248
		249	/*
		250	* Inserts a td into qh list at the top.
		251	*/
		252	static void uhci_insert_tds_in_qh(struct uhci_qh qh, struct urb urb, u32 breadth)
		253	{
		254	struct list_head tmp, head;
		255	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		256	struct uhci_td td, ptd;
		257
		258	if (list_empty(&urbp->td_list))
		259	return;
		260
		261	head = &urbp->td_list;
		262	tmp = head->next;
		263
		264	/* Ordering isn't important here yet since the QH hasn't been */
		265	/* inserted into the schedule yet */
		266	td = list_entry(tmp, struct uhci_td, list);
		267
		268	/* Add the first TD to the QH element pointer */
		269	qh->element = cpu_to_le32(td->dma_handle) \| breadth;
		270
		271	ptd = td;
		272
		273	/* Then link the rest of the TD's */
		274	tmp = tmp->next;
		275	while (tmp != head) {
		276	td = list_entry(tmp, struct uhci_td, list);
		277
		278	tmp = tmp->next;
		279
		280	ptd->link = cpu_to_le32(td->dma_handle) \| breadth;
		281
		282	ptd = td;
		283	}
		284
		285	ptd->link = UHCI_PTR_TERM;
		286	}
		287
		288	static void uhci_free_td(struct uhci_hcd uhci, struct uhci_td td)
		289	{
		290	if (!list_empty(&td->list))
		291	dbg("td %p is still in list!", td);
		292	if (!list_empty(&td->remove_list))
		293	dbg("td %p still in remove_list!", td);
		294	if (!list_empty(&td->fl_list))
		295	dbg("td %p is still in fl_list!", td);
		296
		297	if (td->dev)
		298	usb_put_dev(td->dev);
		299
		300	pci_pool_free(uhci->td_pool, td, td->dma_handle);
		301	}
		302
		303	static struct uhci_qh uhci_alloc_qh(struct uhci_hcd uhci, struct usb_device *dev)
		304	{
		305	dma_addr_t dma_handle;
		306	struct uhci_qh *qh;
		307
		308	qh = pci_pool_alloc_usb(uhci->qh_pool, GFP_ATOMIC, &dma_handle);
		309	if (!qh)
		310	return NULL;
		311
		312	qh->dma_handle = dma_handle;
		313
		314	qh->element = UHCI_PTR_TERM;
		315	qh->link = UHCI_PTR_TERM;
		316
		317	qh->dev = dev;
		318	qh->urbp = NULL;
		319
		320	INIT_LIST_HEAD(&qh->list);
		321	INIT_LIST_HEAD(&qh->remove_list);
		322
		323	usb_get_dev(dev);
		324
		325	return qh;
		326	}
		327
		328	static void uhci_free_qh(struct uhci_hcd uhci, struct uhci_qh qh)
		329	{
		330	if (!list_empty(&qh->list))
		331	dbg("qh %p list not empty!", qh);
		332	if (!list_empty(&qh->remove_list))
		333	dbg("qh %p still in remove_list!", qh);
		334
		335	if (qh->dev)
		336	usb_put_dev(qh->dev);
		337
		338	pci_pool_free(uhci->qh_pool, qh, qh->dma_handle);
		339	}
		340
		341	/*
		342	* Append this urb's qh after the last qh in skelqh->list
		343	* MUST be called with uhci->frame_list_lock acquired
		344	*
		345	* Note that urb_priv.queue_list doesn't have a separate queue head;
		346	* it's a ring with every element "live".
		347	*/
		348	static void _uhci_insert_qh(struct uhci_hcd uhci, struct uhci_qh skelqh, struct urb *urb)
		349	{
		350	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		351	struct list_head *tmp;
		352	struct uhci_qh *lqh;
		353
		354	/* Grab the last QH */
		355	lqh = list_entry(skelqh->list.prev, struct uhci_qh, list);
		356
		357	/*
		358	* Patch this endpoint's URB's QHs to point to the next skelqh:
		359	* skelqh --> ... lqh --> newqh --> next skelqh
		360	* Do this first, so the HC always sees the right QH after this one.
		361	*/
		362	list_for_each (tmp, &urbp->queue_list) {
		363	struct urb_priv *turbp =
		364	list_entry(tmp, struct urb_priv, queue_list);
		365
		366	turbp->qh->link = lqh->link;
		367	}
		368	urbp->qh->link = lqh->link;
		369	wmb(); /* Ordering is important */
		370
		371	/*
		372	* Patch QHs for previous endpoint's queued URBs? HC goes
		373	* here next, not to the next skelqh it now points to.
		374	*
		375	* lqh --> td ... --> qh ... --> td --> qh ... --> td
		376	* \| \| \|
		377	* v v v
		378	* +<----------------+-----------------+
		379	* v
		380	* newqh --> td ... --> td
		381	* \|
		382	* v
		383	* ...
		384	*
		385	* The HC could see (and use!) any of these as we write them.
		386	*/
		387	if (lqh->urbp) {
		388	list_for_each (tmp, &lqh->urbp->queue_list) {
		389	struct urb_priv *turbp =
		390	list_entry(tmp, struct urb_priv, queue_list);
		391
		392	turbp->qh->link = cpu_to_le32(urbp->qh->dma_handle) \| UHCI_PTR_QH;
		393	}
		394	}
		395	lqh->link = cpu_to_le32(urbp->qh->dma_handle) \| UHCI_PTR_QH;
		396
		397	list_add_tail(&urbp->qh->list, &skelqh->list);
		398	}
		399
		400	static void uhci_insert_qh(struct uhci_hcd uhci, struct uhci_qh skelqh, struct urb *urb)
		401	{
		402	unsigned long flags;
		403
		404	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		405	_uhci_insert_qh(uhci, skelqh, urb);
		406	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		407	}
		408
		409	/*
		410	* Start removal of QH from schedule; it finishes next frame.
		411	* TDs should be unlinked before this is called.
		412	*/
		413	static void uhci_remove_qh(struct uhci_hcd uhci, struct uhci_qh qh)
		414	{
		415	unsigned long flags;
		416	struct uhci_qh *pqh;
		417
		418	if (!qh)
		419	return;
		420
		421	qh->urbp = NULL;
		422
		423	/*
		424	* Only go through the hoops if it's actually linked in
		425	* Queued QHs are removed in uhci_delete_queued_urb,
		426	* since (for queued URBs) the pqh is pointed to the next
		427	* QH in the queue, not the next endpoint's QH.
		428	*/
		429	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		430	if (!list_empty(&qh->list)) {
		431	pqh = list_entry(qh->list.prev, struct uhci_qh, list);
		432
		433	if (pqh->urbp) {
		434	struct list_head head, tmp;
		435
		436	head = &pqh->urbp->queue_list;
		437	tmp = head->next;
		438	while (head != tmp) {
		439	struct urb_priv *turbp =
		440	list_entry(tmp, struct urb_priv, queue_list);
		441
		442	tmp = tmp->next;
		443
		444	turbp->qh->link = qh->link;
		445	}
		446	}
		447
		448	pqh->link = qh->link;
		449	mb();
		450	/* Leave qh->link in case the HC is on the QH now, it will */
		451	/* continue the rest of the schedule */
		452	qh->element = UHCI_PTR_TERM;
		453
		454	list_del_init(&qh->list);
		455	}
		456	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		457
		458	spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
		459
		460	/* Check to see if the remove list is empty. Set the IOC bit */
		461	/* to force an interrupt so we can remove the QH */
		462	if (list_empty(&uhci->qh_remove_list))
		463	uhci_set_next_interrupt(uhci);
		464
		465	list_add(&qh->remove_list, &uhci->qh_remove_list);
		466
		467	spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
		468	}
		469
		470	static int uhci_fixup_toggle(struct urb *urb, unsigned int toggle)
		471	{
		472	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		473	struct list_head head, tmp;
		474
		475	head = &urbp->td_list;
		476	tmp = head->next;
		477	while (head != tmp) {
		478	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		479
		480	tmp = tmp->next;
		481
		482	if (toggle)
		483	td->token \|= cpu_to_le32(TD_TOKEN_TOGGLE);
		484	else
		485	td->token &= ~cpu_to_le32(TD_TOKEN_TOGGLE);
		486
		487
		488	toggle ^= 1;
		489	}
		490
		491	return toggle;
		492	}
		493
		494	/* This function will append one URB's QH to another URB's QH. This is for */
		495	/* queuing interrupt, control or bulk transfers */
		496	static void uhci_append_queued_urb(struct uhci_hcd uhci, struct urb eurb, struct urb *urb)
		497	{
		498	struct urb_priv eurbp, urbp, furbp, lurbp;
		499	struct list_head *tmp;
		500	struct uhci_td *lltd;
		501	unsigned long flags;
		502
		503	eurbp = eurb->hcpriv;
		504	urbp = urb->hcpriv;
		505
		506	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		507
		508	/* Find the first URB in the queue */
		509	if (eurbp->queued) {
		510	struct list_head *head = &eurbp->queue_list;
		511
		512	tmp = head->next;
		513	while (tmp != head) {
		514	struct urb_priv *turbp =
		515	list_entry(tmp, struct urb_priv, queue_list);
		516
		517	if (!turbp->queued)
		518	break;
		519
		520	tmp = tmp->next;
		521	}
		522	} else
		523	tmp = &eurbp->queue_list;
		524
		525	furbp = list_entry(tmp, struct urb_priv, queue_list);
		526	lurbp = list_entry(furbp->queue_list.prev, struct urb_priv, queue_list);
		527
		528	lltd = list_entry(lurbp->td_list.prev, struct uhci_td, list);
		529
		530	usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe),
		531	uhci_fixup_toggle(urb, uhci_toggle(td_token(lltd)) ^ 1));
		532
		533	/* All qh's in the queue need to link to the next queue */
		534	urbp->qh->link = eurbp->qh->link;
		535
		536	mb(); /* Make sure we flush everything */
		537
		538	lltd->link = cpu_to_le32(urbp->qh->dma_handle) \| UHCI_PTR_QH;
		539
		540	list_add_tail(&urbp->queue_list, &furbp->queue_list);
		541
		542	urbp->queued = 1;
		543
		544	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		545	}
		546
		547	static void uhci_delete_queued_urb(struct uhci_hcd uhci, struct urb urb)
		548	{
		549	struct urb_priv urbp, nurbp;
		550	struct list_head head, tmp;
		551	struct urb_priv *purbp;
		552	struct uhci_td *pltd;
		553	unsigned int toggle;
		554	unsigned long flags;
		555
		556	urbp = urb->hcpriv;
		557
		558	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		559
		560	if (list_empty(&urbp->queue_list))
		561	goto out;
		562
		563	nurbp = list_entry(urbp->queue_list.next, struct urb_priv, queue_list);
		564
		565	/* Fix up the toggle for the next URB's */
		566	if (!urbp->queued)
		567	/* We just set the toggle in uhci_unlink_generic */
		568	toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
		569	else {
		570	/* If we're in the middle of the queue, grab the toggle */
		571	/* from the TD previous to us */
		572	purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
		573	queue_list);
		574
		575	pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
		576
		577	toggle = uhci_toggle(td_token(pltd)) ^ 1;
		578	}
		579
		580	head = &urbp->queue_list;
		581	tmp = head->next;
		582	while (head != tmp) {
		583	struct urb_priv *turbp;
		584
		585	turbp = list_entry(tmp, struct urb_priv, queue_list);
		586
		587	tmp = tmp->next;
		588
		589	if (!turbp->queued)
		590	break;
		591
		592	toggle = uhci_fixup_toggle(turbp->urb, toggle);
		593	}
		594
		595	usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
		596	usb_pipeout(urb->pipe), toggle);
		597
		598	if (!urbp->queued) {
		599	struct uhci_qh *pqh;
		600
		601	nurbp->queued = 0;
		602
		603	/*
		604	* Fixup the previous QH's queue to link to the new head
		605	* of this queue.
		606	*/
		607	pqh = list_entry(urbp->qh->list.prev, struct uhci_qh, list);
		608
		609	if (pqh->urbp) {
		610	struct list_head head, tmp;
		611
		612	head = &pqh->urbp->queue_list;
		613	tmp = head->next;
		614	while (head != tmp) {
		615	struct urb_priv *turbp =
		616	list_entry(tmp, struct urb_priv, queue_list);
		617
		618	tmp = tmp->next;
		619
		620	turbp->qh->link = cpu_to_le32(nurbp->qh->dma_handle) \| UHCI_PTR_QH;
		621	}
		622	}
		623
		624	pqh->link = cpu_to_le32(nurbp->qh->dma_handle) \| UHCI_PTR_QH;
		625
		626	list_add_tail(&nurbp->qh->list, &urbp->qh->list);
		627	list_del_init(&urbp->qh->list);
		628	} else {
		629	/* We're somewhere in the middle (or end). A bit trickier */
		630	/* than the head scenario */
		631	purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
		632	queue_list);
		633
		634	pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
		635	if (nurbp->queued)
		636	pltd->link = cpu_to_le32(nurbp->qh->dma_handle) \| UHCI_PTR_QH;
		637	else
		638	/* The next URB happens to be the beginning, so */
		639	/* we're the last, end the chain */
		640	pltd->link = UHCI_PTR_TERM;
		641	}
		642
		643	list_del_init(&urbp->queue_list);
		644
		645	out:
		646	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		647	}
		648
		649	extern void* malloc(int size);
		650
		651	static struct urb_priv uhci_alloc_urb_priv(struct uhci_hcd uhci, struct urb *urb)
		652	{
		653	struct urb_priv *urbp;
		654
		655	urbp = malloc(sizeof(struct urb_priv)); //**kmem_cache_alloc(uhci_up_cachep, SLAB_ATOMIC);
		656	if (!urbp) {
		657	err("uhci_alloc_urb_priv: couldn't allocate memory for urb_priv\n");
		658	return NULL;
		659	}
		660
		661	memset((void )urbp, 0, sizeof(urbp));
		662
		663	urbp->inserttime = jiffies26;
		664	urbp->fsbrtime = jiffies26;
		665	urbp->urb = urb;
		666	urbp->dev = urb->dev;
		667
		668	INIT_LIST_HEAD(&urbp->td_list);
		669	INIT_LIST_HEAD(&urbp->queue_list);
		670	INIT_LIST_HEAD(&urbp->complete_list);
		671	INIT_LIST_HEAD(&urbp->urb_list);
		672
		673	list_add_tail(&urbp->urb_list, &uhci->urb_list);
		674
		675	urb->hcpriv = urbp;
		676
		677	return urbp;
		678	}
		679
		680	/*
		681	* MUST be called with urb->lock acquired
		682	*/
		683	static void uhci_add_td_to_urb(struct urb urb, struct uhci_td td)
		684	{
		685	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		686
		687	td->urb = urb;
		688
		689	list_add_tail(&td->list, &urbp->td_list);
		690	}
		691
		692	/*
		693	* MUST be called with urb->lock acquired
		694	*/
		695	static void uhci_remove_td_from_urb(struct uhci_td *td)
		696	{
		697	if (list_empty(&td->list))
		698	return;
		699
		700	list_del_init(&td->list);
		701
		702	td->urb = NULL;
		703	}
		704
		705	/*
		706	* MUST be called with urb->lock acquired
		707	*/
		708	static void uhci_destroy_urb_priv(struct uhci_hcd uhci, struct urb urb)
		709	{
		710	struct list_head head, tmp;
		711	struct urb_priv *urbp;
		712	unsigned long flags;
		713
		714	urbp = (struct urb_priv *)urb->hcpriv;
		715	if (!urbp)
		716	return;
		717
		718	if (!list_empty(&urbp->urb_list))
		719	warn("uhci_destroy_urb_priv: urb %p still on uhci->urb_list or uhci->remove_list", urb);
		720
		721	if (!list_empty(&urbp->complete_list))
		722	warn("uhci_destroy_urb_priv: urb %p still on uhci->complete_list", urb);
		723
		724	spin_lock_irqsave(&uhci->td_remove_list_lock, flags);
		725
		726	/* Check to see if the remove list is empty. Set the IOC bit */
		727	/* to force an interrupt so we can remove the TD's*/
		728	if (list_empty(&uhci->td_remove_list))
		729	uhci_set_next_interrupt(uhci);
		730
		731	head = &urbp->td_list;
		732	tmp = head->next;
		733	while (tmp != head) {
		734	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		735
		736	tmp = tmp->next;
		737
		738	uhci_remove_td_from_urb(td);
		739	uhci_remove_td(uhci, td);
		740	list_add(&td->remove_list, &uhci->td_remove_list);
		741	}
		742
		743	spin_unlock_irqrestore(&uhci->td_remove_list_lock, flags);
		744
		745	urb->hcpriv = NULL;
		746	//**kmem_cache_free(uhci_up_cachep, urbp);
		747	free(urbp);
		748	}
		749
		750	static void uhci_inc_fsbr(struct uhci_hcd uhci, struct urb urb)
		751	{
		752	unsigned long flags;
		753	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		754
		755	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		756
		757	if ((!(urb->transfer_flags & URB_NO_FSBR)) && !urbp->fsbr) {
		758	urbp->fsbr = 1;
		759	if (!uhci->fsbr++ && !uhci->fsbrtimeout)
		760	uhci->skel_term_qh->link = cpu_to_le32(uhci->skel_hs_control_qh->dma_handle) \| UHCI_PTR_QH;
		761	}
		762
		763	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		764	}
		765
		766	static void uhci_dec_fsbr(struct uhci_hcd uhci, struct urb urb)
		767	{
		768	unsigned long flags;
		769	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		770
		771	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		772
		773	if ((!(urb->transfer_flags & URB_NO_FSBR)) && urbp->fsbr) {
		774	urbp->fsbr = 0;
		775	if (!--uhci->fsbr)
		776	uhci->fsbrtimeout = jiffies26 + FSBR_DELAY;
		777	}
		778
		779	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		780	}
		781
		782	/*
		783	* Map status to standard result codes
		784	*
		785	* <status> is (td->status & 0xFE0000) [a.k.a. uhci_status_bits(td->status)]
		786	* <dir_out> is True for output TDs and False for input TDs.
		787	*/
		788	static int uhci_map_status(int status, int dir_out)
		789	{
		790	if (!status)
		791	return 0;
		792	if (status & TD_CTRL_BITSTUFF) /* Bitstuff error */
		793	return -EPROTO;
		794	if (status & TD_CTRL_CRCTIMEO) { /* CRC/Timeout */
		795	if (dir_out)
		796	return -ETIMEDOUT;
		797	else
		798	return -EILSEQ;
		799	}
		800	if (status & TD_CTRL_NAK) /* NAK */
		801	return -ETIMEDOUT;
		802	if (status & TD_CTRL_BABBLE) /* Babble */
		803	return -EOVERFLOW;
		804	if (status & TD_CTRL_DBUFERR) /* Buffer error */
		805	return -ENOSR;
		806	if (status & TD_CTRL_STALLED) /* Stalled */
		807	return -EPIPE;
		808	if (status & TD_CTRL_ACTIVE) /* Active */
		809	return 0;
		810
		811	return -EINVAL;
		812	}
		813
		814	/*
		815	* Control transfers
		816	*/
		817	static int uhci_submit_control(struct uhci_hcd uhci, struct urb urb, struct urb *eurb)
		818	{
		819	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		820	struct uhci_td *td;
		821	struct uhci_qh qh, skelqh;
		822	unsigned long destination, status;
		823	int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
		824	int len = urb->transfer_buffer_length;
		825	dma_addr_t data = urb->transfer_dma;
		826
		827	/* The "pipe" thing contains the destination in bits 8--18 */
		828	destination = (urb->pipe & PIPE_DEVEP_MASK) \| USB_PID_SETUP;
		829
		830	/* 3 errors */
		831	status = TD_CTRL_ACTIVE \| uhci_maxerr(3);
		832	if (urb->dev->speed == USB_SPEED_LOW)
		833	status \|= TD_CTRL_LS;
		834
		835	/*
		836	* Build the TD for the control request
		837	*/
		838	td = uhci_alloc_td(uhci, urb->dev);
		839	if (!td)
		840	return -ENOMEM;
		841
		842	uhci_add_td_to_urb(urb, td);
		843	uhci_fill_td(td, status, destination \| uhci_explen(7),
		844	urb->setup_dma);
		845
		846	/*
		847	* If direction is "send", change the frame from SETUP (0x2D)
		848	* to OUT (0xE1). Else change it from SETUP to IN (0x69).
		849	*/
		850	destination ^= (USB_PID_SETUP ^ usb_packetid(urb->pipe));
		851
		852	if (!(urb->transfer_flags & URB_SHORT_NOT_OK))
		853	status \|= TD_CTRL_SPD;
		854
		855	/*
		856	* Build the DATA TD's
		857	*/
		858	while (len > 0) {
		859	int pktsze = len;
		860
		861	if (pktsze > maxsze)
		862	pktsze = maxsze;
		863
		864	td = uhci_alloc_td(uhci, urb->dev);
		865	if (!td)
		866	return -ENOMEM;
		867
		868	/* Alternate Data0/1 (start with Data1) */
		869	destination ^= TD_TOKEN_TOGGLE;
		870
		871	uhci_add_td_to_urb(urb, td);
		872	uhci_fill_td(td, status, destination \| uhci_explen(pktsze - 1),
		873	data);
		874
		875	data += pktsze;
		876	len -= pktsze;
		877	}
		878
		879	/*
		880	* Build the final TD for control status
		881	*/
		882	td = uhci_alloc_td(uhci, urb->dev);
		883	if (!td)
		884	return -ENOMEM;
		885
		886	/*
		887	* It's IN if the pipe is an output pipe or we're not expecting
		888	* data back.
		889	*/
		890	destination &= ~TD_TOKEN_PID_MASK;
		891	if (usb_pipeout(urb->pipe) \|\| !urb->transfer_buffer_length)
		892	destination \|= USB_PID_IN;
		893	else
		894	destination \|= USB_PID_OUT;
		895
		896	destination \|= TD_TOKEN_TOGGLE; /* End in Data1 */
		897
		898	status &= ~TD_CTRL_SPD;
		899
		900	uhci_add_td_to_urb(urb, td);
		901	uhci_fill_td(td, status \| TD_CTRL_IOC,
		902	destination \| uhci_explen(UHCI_NULL_DATA_SIZE), 0);
		903
		904	qh = uhci_alloc_qh(uhci, urb->dev);
		905	if (!qh)
		906	return -ENOMEM;
		907
		908	urbp->qh = qh;
		909	qh->urbp = urbp;
		910
		911	uhci_insert_tds_in_qh(qh, urb, UHCI_PTR_BREADTH);
		912
		913	/* Low speed transfers get a different queue, and won't hog the bus */
		914	if (urb->dev->speed == USB_SPEED_LOW)
		915	skelqh = uhci->skel_ls_control_qh;
		916	else {
		917	skelqh = uhci->skel_hs_control_qh;
		918	uhci_inc_fsbr(uhci, urb);
		919	}
		920
		921	if (eurb)
		922	uhci_append_queued_urb(uhci, eurb, urb);
		923	else
		924	uhci_insert_qh(uhci, skelqh, urb);
		925
		926	return -EINPROGRESS;
		927	}
		928
		929	/*
		930	* If control was short, then end status packet wasn't sent, so this
		931	* reorganize s so it's sent to finish the transfer. The original QH is
		932	* removed from the skel and discarded; all TDs except the last (status)
		933	* are deleted; the last (status) TD is put on a new QH which is reinserted
		934	* into the skel. Since the last TD and urb_priv are reused, the TD->link
		935	* and urb_priv maintain any queued QHs.
		936	*/
		937	static int usb_control_retrigger_status(struct uhci_hcd uhci, struct urb urb)
		938	{
		939	struct list_head tmp, head;
		940	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		941
		942	urbp->short_control_packet = 1;
		943
		944	/* Create a new QH to avoid pointer overwriting problems */
		945	uhci_remove_qh(uhci, urbp->qh);
		946
		947	/* Delete all of the TD's except for the status TD at the end */
		948	head = &urbp->td_list;
		949	tmp = head->next;
		950	while (tmp != head && tmp->next != head) {
		951	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		952
		953	tmp = tmp->next;
		954
		955	uhci_remove_td_from_urb(td);
		956	uhci_remove_td(uhci, td);
		957	uhci_free_td(uhci, td);
		958	}
		959
		960	urbp->qh = uhci_alloc_qh(uhci, urb->dev);
		961	if (!urbp->qh) {
		962	err("unable to allocate new QH for control retrigger");
		963	return -ENOMEM;
		964	}
		965
		966	urbp->qh->urbp = urbp;
		967
		968	/* One TD, who cares about Breadth first? */
		969	uhci_insert_tds_in_qh(urbp->qh, urb, UHCI_PTR_DEPTH);
		970
		971	/* Low speed transfers get a different queue */
		972	if (urb->dev->speed == USB_SPEED_LOW)
		973	uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
		974	else
		975	uhci_insert_qh(uhci, uhci->skel_hs_control_qh, urb);
		976
		977	return -EINPROGRESS;
		978	}
		979
		980
		981	static int uhci_result_control(struct uhci_hcd uhci, struct urb urb)
		982	{
		983	struct list_head tmp, head;
		984	struct urb_priv *urbp = urb->hcpriv;
		985	struct uhci_td *td;
		986	unsigned int status;
		987	int ret = 0;
		988
		989	if (list_empty(&urbp->td_list))
		990	return -EINVAL;
		991
		992	head = &urbp->td_list;
		993	if (urbp->short_control_packet) {
		994	tmp = head->prev;
		995	goto status_phase;
		996	}
		997	tmp = head->next;
		998	td = list_entry(tmp, struct uhci_td, list);
		999
		1000	/* The first TD is the SETUP phase, check the status, but skip */
		1001	/* the count */
		1002	status = uhci_status_bits(td_status(td));
		1003	if (status & TD_CTRL_ACTIVE)
		1004	return -EINPROGRESS;
		1005
		1006	if (status)
		1007	goto td_error;
		1008
		1009	urb->actual_length = 0;
		1010
		1011	/* The rest of the TD's (but the last) are data */
		1012	tmp = tmp->next;
		1013	while (tmp != head && tmp->next != head) {
		1014	td = list_entry(tmp, struct uhci_td, list);
		1015
		1016	tmp = tmp->next;
		1017
		1018	status = uhci_status_bits(td_status(td));
		1019	if (status & TD_CTRL_ACTIVE)
		1020	return -EINPROGRESS;
		1021
		1022	urb->actual_length += uhci_actual_length(td_status(td));
		1023
		1024	if (status)
		1025	goto td_error;
		1026
		1027	/* Check to see if we received a short packet */
		1028	if (uhci_actual_length(td_status(td)) < uhci_expected_length(td_token(td))) {
		1029	if (urb->transfer_flags & URB_SHORT_NOT_OK) {
		1030	ret = -EREMOTEIO;
		1031	goto err;
		1032	}
		1033
		1034	if (uhci_packetid(td_token(td)) == USB_PID_IN)
		1035	return usb_control_retrigger_status(uhci, urb);
		1036	else
		1037	return 0;
		1038	}
		1039	}
		1040
		1041	status_phase:
		1042	td = list_entry(tmp, struct uhci_td, list);
		1043
		1044	/* Control status phase */
		1045	status = td_status(td);
		1046
		1047	#ifdef I_HAVE_BUGGY_APC_BACKUPS
		1048	/* APC BackUPS Pro kludge */
		1049	/* It tries to send all of the descriptor instead of the amount */
		1050	/* we requested */
		1051	if (status & TD_CTRL_IOC && /* IOC is masked out by uhci_status_bits */
		1052	status & TD_CTRL_ACTIVE &&
		1053	status & TD_CTRL_NAK)
		1054	return 0;
		1055	#endif
		1056
		1057	if (status & TD_CTRL_ACTIVE)
		1058	return -EINPROGRESS;
		1059
		1060	if (uhci_status_bits(status))
		1061	goto td_error;
		1062
		1063	return 0;
		1064
		1065	td_error:
		1066	ret = uhci_map_status(status, uhci_packetout(td_token(td)));
		1067
		1068	err:
		1069	if ((debug == 1 && ret != -EPIPE) \|\| debug > 1) {
		1070	/* Some debugging code */
		1071	dbg("uhci_result_control() failed with status %x", status);
		1072
		1073	if (errbuf) {
		1074	/* Print the chain for debugging purposes */
		1075	uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
		1076
		1077	lprintk(errbuf);
		1078	}
		1079	}
		1080
		1081	return ret;
		1082	}
		1083
		1084	/*
		1085	* Common submit for bulk and interrupt
		1086	*/
		1087	static int uhci_submit_common(struct uhci_hcd uhci, struct urb urb, struct urb eurb, struct uhci_qh skelqh)
		1088	{
		1089	struct uhci_td *td;
		1090	struct uhci_qh *qh;
		1091	unsigned long destination, status;
		1092	int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
		1093	int len = urb->transfer_buffer_length;
		1094	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		1095	dma_addr_t data = urb->transfer_dma;
		1096
		1097	if (len < 0)
		1098	return -EINVAL;
		1099
		1100	/* The "pipe" thing contains the destination in bits 8--18 */
		1101	destination = (urb->pipe & PIPE_DEVEP_MASK) \| usb_packetid(urb->pipe);
		1102
		1103	status = uhci_maxerr(3) \| TD_CTRL_ACTIVE;
		1104	if (urb->dev->speed == USB_SPEED_LOW)
		1105	status \|= TD_CTRL_LS;
		1106	if (!(urb->transfer_flags & URB_SHORT_NOT_OK))
		1107	status \|= TD_CTRL_SPD;
		1108
		1109	/*
		1110	* Build the DATA TD's
		1111	*/
		1112	do { /* Allow zero length packets */
		1113	int pktsze = len;
		1114
		1115	if (pktsze > maxsze)
		1116	pktsze = maxsze;
		1117
		1118	td = uhci_alloc_td(uhci, urb->dev);
		1119	if (!td)
		1120	return -ENOMEM;
		1121
		1122	uhci_add_td_to_urb(urb, td);
		1123	uhci_fill_td(td, status, destination \| uhci_explen(pktsze - 1) \|
		1124	(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
		1125	usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
		1126	data);
		1127
		1128	data += pktsze;
		1129	len -= maxsze;
		1130
		1131	usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
		1132	usb_pipeout(urb->pipe));
		1133	} while (len > 0);
		1134
		1135	/*
		1136	* URB_ZERO_PACKET means adding a 0-length packet, if direction
		1137	* is OUT and the transfer_length was an exact multiple of maxsze,
		1138	* hence (len = transfer_length - N * maxsze) == 0
		1139	* however, if transfer_length == 0, the zero packet was already
		1140	* prepared above.
		1141	*/
		1142	if (usb_pipeout(urb->pipe) && (urb->transfer_flags & URB_ZERO_PACKET) &&
		1143	!len && urb->transfer_buffer_length) {
		1144	td = uhci_alloc_td(uhci, urb->dev);
		1145	if (!td)
		1146	return -ENOMEM;
		1147
		1148	uhci_add_td_to_urb(urb, td);
		1149	uhci_fill_td(td, status, destination \| uhci_explen(UHCI_NULL_DATA_SIZE) \|
		1150	(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
		1151	usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
		1152	data);
		1153
		1154	usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
		1155	usb_pipeout(urb->pipe));
		1156	}
		1157
		1158	/* Set the flag on the last packet */
		1159	td->status \|= cpu_to_le32(TD_CTRL_IOC);
		1160
		1161	qh = uhci_alloc_qh(uhci, urb->dev);
		1162	if (!qh)
		1163	return -ENOMEM;
		1164
		1165	urbp->qh = qh;
		1166	qh->urbp = urbp;
		1167
		1168	/* Always breadth first */
		1169	uhci_insert_tds_in_qh(qh, urb, UHCI_PTR_BREADTH);
		1170
		1171	if (eurb)
		1172	uhci_append_queued_urb(uhci, eurb, urb);
		1173	else
		1174	uhci_insert_qh(uhci, skelqh, urb);
		1175
		1176	return -EINPROGRESS;
		1177	}
		1178
		1179	/*
		1180	* Common result for bulk and interrupt
		1181	*/
		1182	static int uhci_result_common(struct uhci_hcd uhci, struct urb urb)
		1183	{
		1184	struct list_head tmp, head;
		1185	struct urb_priv *urbp = urb->hcpriv;
		1186	struct uhci_td *td;
		1187	unsigned int status = 0;
		1188	int ret = 0;
		1189
		1190	urb->actual_length = 0;
		1191
		1192	head = &urbp->td_list;
		1193	tmp = head->next;
		1194	while (tmp != head) {
		1195	td = list_entry(tmp, struct uhci_td, list);
		1196
		1197	tmp = tmp->next;
		1198
		1199	status = uhci_status_bits(td_status(td));
		1200	if (status & TD_CTRL_ACTIVE)
		1201	return -EINPROGRESS;
		1202
		1203	urb->actual_length += uhci_actual_length(td_status(td));
		1204
		1205	if (status)
		1206	goto td_error;
		1207
		1208	if (uhci_actual_length(td_status(td)) < uhci_expected_length(td_token(td))) {
		1209	if (urb->transfer_flags & URB_SHORT_NOT_OK) {
		1210	ret = -EREMOTEIO;
		1211	goto err;
		1212	} else
		1213	return 0;
		1214	}
		1215	}
		1216
		1217	return 0;
		1218
		1219	td_error:
		1220	ret = uhci_map_status(status, uhci_packetout(td_token(td)));
		1221	if (ret == -EPIPE)
		1222	/* endpoint has stalled - mark it halted */
		1223	usb_endpoint_halt(urb->dev, uhci_endpoint(td_token(td)),
		1224	uhci_packetout(td_token(td)));
		1225
		1226	err:
		1227	/*
		1228	* Enable this chunk of code if you want to see some more debugging.
		1229	* But be careful, it has the tendancy to starve out khubd and prevent
		1230	* disconnects from happening successfully if you have a slow debug
		1231	* log interface (like a serial console.
		1232	*/
		1233	#if 0
		1234	if ((debug == 1 && ret != -EPIPE) \|\| debug > 1) {
		1235	/* Some debugging code */
		1236	dbg("uhci_result_common() failed with status %x", status);
		1237
		1238	if (errbuf) {
		1239	/* Print the chain for debugging purposes */
		1240	uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
		1241
		1242	lprintk(errbuf);
		1243	}
		1244	}
		1245	#endif
		1246	return ret;
		1247	}
		1248
		1249	static inline int uhci_submit_bulk(struct uhci_hcd uhci, struct urb urb, struct urb *eurb)
		1250	{
		1251	int ret;
		1252
		1253	/* Can't have low speed bulk transfers */
		1254	if (urb->dev->speed == USB_SPEED_LOW)
		1255	return -EINVAL;
		1256
		1257	ret = uhci_submit_common(uhci, urb, eurb, uhci->skel_bulk_qh);
		1258	if (ret == -EINPROGRESS)
		1259	uhci_inc_fsbr(uhci, urb);
		1260
		1261	return ret;
		1262	}
		1263
		1264	static inline int uhci_submit_interrupt(struct uhci_hcd uhci, struct urb urb, struct urb *eurb)
		1265	{
		1266	/* USB 1.1 interrupt transfers only involve one packet per interval;
		1267	* that's the uhci_submit_common() "breadth first" policy. Drivers
		1268	* can submit urbs of any length, but longer ones might need many
		1269	* intervals to complete.
		1270	*/
		1271	return uhci_submit_common(uhci, urb, eurb, uhci->skelqh[__interval_to_skel(urb->interval)]);
		1272	}
		1273
		1274	/*
		1275	* Bulk and interrupt use common result
		1276	*/
		1277	#define uhci_result_bulk uhci_result_common
		1278	#define uhci_result_interrupt uhci_result_common
		1279
		1280	/*
		1281	* Isochronous transfers
		1282	*/
		1283	static int isochronous_find_limits(struct uhci_hcd uhci, struct urb urb, unsigned int start, unsigned int end)
		1284	{
		1285	struct urb *last_urb = NULL;
		1286	struct list_head tmp, head;
		1287	int ret = 0;
		1288
		1289	head = &uhci->urb_list;
		1290	tmp = head->next;
		1291	while (tmp != head) {
		1292	struct urb_priv *up = list_entry(tmp, struct urb_priv, urb_list);
		1293	struct urb *u = up->urb;
		1294
		1295	tmp = tmp->next;
		1296
		1297	/* look for pending URB's with identical pipe handle */
		1298	if ((urb->pipe == u->pipe) && (urb->dev == u->dev) &&
		1299	(u->status == -EINPROGRESS) && (u != urb)) {
		1300	if (!last_urb)
		1301	*start = u->start_frame;
		1302	last_urb = u;
		1303	}
		1304	}
		1305
		1306	if (last_urb) {
		1307	end = (last_urb->start_frame + last_urb->number_of_packets
		1308	last_urb->interval) & (UHCI_NUMFRAMES-1);
		1309	ret = 0;
		1310	} else
		1311	ret = -1; /* no previous urb found */
		1312
		1313	return ret;
		1314	}
		1315
		1316	static int isochronous_find_start(struct uhci_hcd uhci, struct urb urb)
		1317	{
		1318	int limits;
		1319	unsigned int start = 0, end = 0;
		1320
		1321	if (urb->number_of_packets > 900) /* 900? Why? */
		1322	return -EFBIG;
		1323
		1324	limits = isochronous_find_limits(uhci, urb, &start, &end);
		1325
		1326	if (urb->transfer_flags & URB_ISO_ASAP) {
		1327	if (limits) {
		1328	int curframe;
		1329
		1330	curframe = uhci_get_current_frame_number(uhci) % UHCI_NUMFRAMES;
		1331	urb->start_frame = (curframe + 10) % UHCI_NUMFRAMES;
		1332	} else
		1333	urb->start_frame = end;
		1334	} else {
		1335	urb->start_frame %= UHCI_NUMFRAMES;
		1336	/* FIXME: Sanity check */
		1337	}
		1338
		1339	return 0;
		1340	}
		1341
		1342	/*
		1343	* Isochronous transfers
		1344	*/
		1345	static int uhci_submit_isochronous(struct uhci_hcd uhci, struct urb urb)
		1346	{
		1347	struct uhci_td *td;
		1348	int i, ret, frame;
		1349	int status, destination;
		1350
		1351	status = TD_CTRL_ACTIVE \| TD_CTRL_IOS;
		1352	destination = (urb->pipe & PIPE_DEVEP_MASK) \| usb_packetid(urb->pipe);
		1353
		1354	ret = isochronous_find_start(uhci, urb);
		1355	if (ret)
		1356	return ret;
		1357
		1358	frame = urb->start_frame;
		1359	for (i = 0; i < urb->number_of_packets; i++, frame += urb->interval) {
		1360	if (!urb->iso_frame_desc[i].length)
		1361	continue;
		1362
		1363	td = uhci_alloc_td(uhci, urb->dev);
		1364	if (!td)
		1365	return -ENOMEM;
		1366
		1367	uhci_add_td_to_urb(urb, td);
		1368	uhci_fill_td(td, status, destination \| uhci_explen(urb->iso_frame_desc[i].length - 1),
		1369	urb->transfer_dma + urb->iso_frame_desc[i].offset);
		1370
		1371	if (i + 1 >= urb->number_of_packets)
		1372	td->status \|= cpu_to_le32(TD_CTRL_IOC);
		1373
		1374	uhci_insert_td_frame_list(uhci, td, frame);
		1375	}
		1376
		1377	return -EINPROGRESS;
		1378	}
		1379
		1380	static int uhci_result_isochronous(struct uhci_hcd uhci, struct urb urb)
		1381	{
		1382	struct list_head tmp, head;
		1383	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		1384	int status;
		1385	int i, ret = 0;
		1386
		1387	urb->actual_length = 0;
		1388
		1389	i = 0;
		1390	head = &urbp->td_list;
		1391	tmp = head->next;
		1392	while (tmp != head) {
		1393	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		1394	int actlength;
		1395
		1396	tmp = tmp->next;
		1397
		1398	if (td_status(td) & TD_CTRL_ACTIVE)
		1399	return -EINPROGRESS;
		1400
		1401	actlength = uhci_actual_length(td_status(td));
		1402	urb->iso_frame_desc[i].actual_length = actlength;
		1403	urb->actual_length += actlength;
		1404
		1405	status = uhci_map_status(uhci_status_bits(td_status(td)), usb_pipeout(urb->pipe));
		1406	urb->iso_frame_desc[i].status = status;
		1407	if (status) {
		1408	urb->error_count++;
		1409	ret = status;
		1410	}
		1411
		1412	i++;
		1413	}
		1414
		1415	return ret;
		1416	}
		1417
		1418	/*
		1419	* MUST be called with uhci->urb_list_lock acquired
		1420	*/
		1421	static struct urb uhci_find_urb_ep(struct uhci_hcd uhci, struct urb *urb)
		1422	{
		1423	struct list_head tmp, head;
		1424
		1425	/* We don't match Isoc transfers since they are special */
		1426	if (usb_pipeisoc(urb->pipe))
		1427	return NULL;
		1428
		1429	head = &uhci->urb_list;
		1430	tmp = head->next;
		1431	while (tmp != head) {
		1432	struct urb_priv *up = list_entry(tmp, struct urb_priv, urb_list);
		1433	struct urb *u = up->urb;
		1434
		1435	tmp = tmp->next;
		1436
		1437	if (u->dev == urb->dev && u->status == -EINPROGRESS) {
		1438	/* For control, ignore the direction */
		1439	if (usb_pipecontrol(urb->pipe) &&
		1440	(u->pipe & ~USB_DIR_IN) == (urb->pipe & ~USB_DIR_IN))
		1441	return u;
		1442	else if (u->pipe == urb->pipe)
		1443	return u;
		1444	}
		1445	}
		1446
		1447	return NULL;
		1448	}
		1449
		1450	static int uhci_urb_enqueue(struct usb_hcd hcd, struct urb urb, int mem_flags)
		1451	{
		1452	int ret = -EINVAL;
		1453	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1454	unsigned long flags;
		1455	struct urb *eurb;
		1456	int bustime;
		1457
		1458	spin_lock_irqsave(&uhci->urb_list_lock, flags);
		1459
		1460	eurb = uhci_find_urb_ep(uhci, urb);
		1461
		1462	if (!uhci_alloc_urb_priv(uhci, urb)) {
		1463	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		1464	return -ENOMEM;
		1465	}
		1466
		1467	switch (usb_pipetype(urb->pipe)) {
		1468	case PIPE_CONTROL:
		1469	ret = uhci_submit_control(uhci, urb, eurb);
		1470	break;
		1471	case PIPE_INTERRUPT:
		1472	if (!eurb) {
		1473	bustime = usb_check_bandwidth(urb->dev, urb);
		1474	if (bustime < 0)
		1475	ret = bustime;
		1476	else {
		1477	ret = uhci_submit_interrupt(uhci, urb, eurb);
		1478	if (ret == -EINPROGRESS)
		1479	usb_claim_bandwidth(urb->dev, urb, bustime, 0);
		1480	}
		1481	} else { /* inherit from parent */
		1482	urb->bandwidth = eurb->bandwidth;
		1483	ret = uhci_submit_interrupt(uhci, urb, eurb);
		1484	}
		1485	break;
		1486	case PIPE_BULK:
		1487	ret = uhci_submit_bulk(uhci, urb, eurb);
		1488	break;
		1489	case PIPE_ISOCHRONOUS:
		1490	bustime = usb_check_bandwidth(urb->dev, urb);
		1491	if (bustime < 0) {
		1492	ret = bustime;
		1493	break;
		1494	}
		1495
		1496	ret = uhci_submit_isochronous(uhci, urb);
		1497	if (ret == -EINPROGRESS)
		1498	usb_claim_bandwidth(urb->dev, urb, bustime, 1);
		1499	break;
		1500	}
		1501
		1502	if (ret != -EINPROGRESS) {
		1503	/* Submit failed, so delete it from the urb_list */
		1504	struct urb_priv *urbp = urb->hcpriv;
		1505
		1506	list_del_init(&urbp->urb_list);
		1507	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		1508	uhci_destroy_urb_priv (uhci, urb);
		1509
		1510	return ret;
		1511	}
		1512
		1513	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		1514
		1515	return 0;
		1516	}
		1517
		1518	/*
		1519	* Return the result of a transfer
		1520	*
		1521	* MUST be called with urb_list_lock acquired
		1522	*/
		1523	static void uhci_transfer_result(struct uhci_hcd uhci, struct urb urb)
		1524	{
		1525	int ret = -EINVAL;
		1526	unsigned long flags;
		1527	struct urb_priv *urbp;
		1528
		1529	spin_lock_irqsave(&urb->lock, flags);
		1530
		1531	urbp = (struct urb_priv *)urb->hcpriv;
		1532
		1533	if (urb->status != -EINPROGRESS) {
		1534	info("uhci_transfer_result: called for URB %p not in flight?", urb);
		1535	goto out;
		1536	}
		1537
		1538	switch (usb_pipetype(urb->pipe)) {
		1539	case PIPE_CONTROL:
		1540	ret = uhci_result_control(uhci, urb);
		1541	break;
		1542	case PIPE_INTERRUPT:
		1543	ret = uhci_result_interrupt(uhci, urb);
		1544	break;
		1545	case PIPE_BULK:
		1546	ret = uhci_result_bulk(uhci, urb);
		1547	break;
		1548	case PIPE_ISOCHRONOUS:
		1549	ret = uhci_result_isochronous(uhci, urb);
		1550	break;
		1551	}
		1552
		1553	urbp->status = ret;
		1554
		1555	if (ret == -EINPROGRESS)
		1556	goto out;
		1557
		1558	switch (usb_pipetype(urb->pipe)) {
		1559	case PIPE_CONTROL:
		1560	case PIPE_BULK:
		1561	case PIPE_ISOCHRONOUS:
		1562	/* Release bandwidth for Interrupt or Isoc. transfers */
		1563	/* Spinlock needed ? */
		1564	if (urb->bandwidth)
		1565	usb_release_bandwidth(urb->dev, urb, 1);
		1566	uhci_unlink_generic(uhci, urb);
		1567	break;
		1568	case PIPE_INTERRUPT:
		1569	/* Release bandwidth for Interrupt or Isoc. transfers */
		1570	/* Make sure we don't release if we have a queued URB */
		1571	spin_lock(&uhci->frame_list_lock);
		1572	/* Spinlock needed ? */
		1573	if (list_empty(&urbp->queue_list) && urb->bandwidth)
		1574	usb_release_bandwidth(urb->dev, urb, 0);
		1575	else
		1576	/* bandwidth was passed on to queued URB, */
		1577	/* so don't let usb_unlink_urb() release it */
		1578	urb->bandwidth = 0;
		1579	spin_unlock(&uhci->frame_list_lock);
		1580	uhci_unlink_generic(uhci, urb);
		1581	break;
		1582	default:
		1583	info("uhci_transfer_result: unknown pipe type %d for urb %p\n",
		1584	usb_pipetype(urb->pipe), urb);
		1585	}
		1586
		1587	/* Remove it from uhci->urb_list */
		1588	list_del_init(&urbp->urb_list);
		1589
		1590	uhci_add_complete(uhci, urb);
		1591
		1592	out:
		1593	spin_unlock_irqrestore(&urb->lock, flags);
		1594	}
		1595
		1596	/*
		1597	* MUST be called with urb->lock acquired
		1598	*/
		1599	static void uhci_unlink_generic(struct uhci_hcd uhci, struct urb urb)
		1600	{
		1601	struct list_head head, tmp;
		1602	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		1603	int prevactive = 1;
		1604
		1605	/* We can get called when urbp allocation fails, so check */
		1606	if (!urbp)
		1607	return;
		1608
		1609	uhci_dec_fsbr(uhci, urb); /* Safe since it checks */
		1610
		1611	/*
		1612	* Now we need to find out what the last successful toggle was
		1613	* so we can update the local data toggle for the next transfer
		1614	*
		1615	* There's 3 way's the last successful completed TD is found:
		1616	*
		1617	* 1) The TD is NOT active and the actual length < expected length
		1618	* 2) The TD is NOT active and it's the last TD in the chain
		1619	* 3) The TD is active and the previous TD is NOT active
		1620	*
		1621	* Control and Isochronous ignore the toggle, so this is safe
		1622	* for all types
		1623	*/
		1624	head = &urbp->td_list;
		1625	tmp = head->next;
		1626	while (tmp != head) {
		1627	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		1628
		1629	tmp = tmp->next;
		1630
		1631	if (!(td_status(td) & TD_CTRL_ACTIVE) &&
		1632	(uhci_actual_length(td_status(td)) < uhci_expected_length(td_token(td)) \|\|
		1633	tmp == head))
		1634	usb_settoggle(urb->dev, uhci_endpoint(td_token(td)),
		1635	uhci_packetout(td_token(td)),
		1636	uhci_toggle(td_token(td)) ^ 1);
		1637	else if ((td_status(td) & TD_CTRL_ACTIVE) && !prevactive)
		1638	usb_settoggle(urb->dev, uhci_endpoint(td_token(td)),
		1639	uhci_packetout(td_token(td)),
		1640	uhci_toggle(td_token(td)));
		1641
		1642	prevactive = td_status(td) & TD_CTRL_ACTIVE;
		1643	}
		1644
		1645	uhci_delete_queued_urb(uhci, urb);
		1646
		1647	/* The interrupt loop will reclaim the QH's */
		1648	uhci_remove_qh(uhci, urbp->qh);
		1649	urbp->qh = NULL;
		1650	}
		1651
		1652	static int uhci_urb_dequeue(struct usb_hcd hcd, struct urb urb)
		1653	{
		1654	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1655	unsigned long flags;
		1656	struct urb_priv *urbp = urb->hcpriv;
		1657
		1658	/* If this is an interrupt URB that is being killed in urb->complete, */
		1659	/* then just set its status and return */
		1660	if (!urbp) {
		1661	urb->status = -ECONNRESET;
		1662	return 0;
		1663	}
		1664
		1665	spin_lock_irqsave(&uhci->urb_list_lock, flags);
		1666
		1667	list_del_init(&urbp->urb_list);
		1668
		1669	uhci_unlink_generic(uhci, urb);
		1670
		1671	spin_lock(&uhci->urb_remove_list_lock);
		1672
		1673	/* If we're the first, set the next interrupt bit */
		1674	if (list_empty(&uhci->urb_remove_list))
		1675	uhci_set_next_interrupt(uhci);
		1676	list_add(&urbp->urb_list, &uhci->urb_remove_list);
		1677
		1678	spin_unlock(&uhci->urb_remove_list_lock);
		1679	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		1680	return 0;
		1681	}
		1682
		1683	static int uhci_fsbr_timeout(struct uhci_hcd uhci, struct urb urb)
		1684	{
		1685	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		1686	struct list_head head, tmp;
		1687	int count = 0;
		1688
		1689	uhci_dec_fsbr(uhci, urb);
		1690
		1691	urbp->fsbr_timeout = 1;
		1692
		1693	/*
		1694	* Ideally we would want to fix qh->element as well, but it's
		1695	* read/write by the HC, so that can introduce a race. It's not
		1696	* really worth the hassle
		1697	*/
		1698
		1699	head = &urbp->td_list;
		1700	tmp = head->next;
		1701	while (tmp != head) {
		1702	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		1703
		1704	tmp = tmp->next;
		1705
		1706	/*
		1707	* Make sure we don't do the last one (since it'll have the
		1708	* TERM bit set) as well as we skip every so many TD's to
		1709	* make sure it doesn't hog the bandwidth
		1710	*/
		1711	if (tmp != head && (count % DEPTH_INTERVAL) == (DEPTH_INTERVAL - 1))
		1712	td->link \|= UHCI_PTR_DEPTH;
		1713
		1714	count++;
		1715	}
		1716
		1717	return 0;
		1718	}
		1719
		1720	/*
		1721	* uhci_get_current_frame_number()
		1722	*
		1723	* returns the current frame number for a USB bus/controller.
		1724	*/
		1725	static int uhci_get_current_frame_number(struct uhci_hcd *uhci)
		1726	{
		1727	return inw(uhci->io_addr + USBFRNUM);
		1728	}
		1729
		1730	static int init_stall_timer(struct usb_hcd *hcd);
		1731
		1732	static void stall_callback(unsigned long ptr)
		1733	{
		1734	struct usb_hcd hcd = (struct usb_hcd )ptr;
		1735	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1736	struct list_head list, tmp, head;
		1737	unsigned long flags;
		1738
		1739	INIT_LIST_HEAD(&list);
		1740
		1741	spin_lock_irqsave(&uhci->urb_list_lock, flags);
		1742	head = &uhci->urb_list;
		1743	tmp = head->next;
		1744	while (tmp != head) {
		1745	struct urb_priv *up = list_entry(tmp, struct urb_priv, urb_list);
		1746	struct urb *u = up->urb;
		1747
		1748	tmp = tmp->next;
		1749
		1750	spin_lock(&u->lock);
		1751
		1752	/* Check if the FSBR timed out */
		1753	if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies26, up->fsbrtime + IDLE_TIMEOUT))
		1754	uhci_fsbr_timeout(uhci, u);
		1755
		1756	/* Check if the URB timed out */
		1757	if (u->timeout && time_after_eq(jiffies26, up->inserttime + u->timeout))
		1758	list_move_tail(&up->urb_list, &list);
		1759
		1760	spin_unlock(&u->lock);
		1761	}
		1762	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		1763
		1764	head = &list;
		1765	tmp = head->next;
		1766	while (tmp != head) {
		1767	struct urb_priv *up = list_entry(tmp, struct urb_priv, urb_list);
		1768	struct urb *u = up->urb;
		1769
		1770	tmp = tmp->next;
		1771
		1772	uhci_urb_dequeue(hcd, u);
		1773	}
		1774
		1775	/* Really disable FSBR */
		1776	if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies26, uhci->fsbrtimeout)) {
		1777	uhci->fsbrtimeout = 0;
		1778	uhci->skel_term_qh->link = UHCI_PTR_TERM;
		1779	}
		1780
		1781	/* Poll for and perform state transitions */
		1782	hc_state_transitions(uhci);
		1783
		1784	init_stall_timer(hcd);
		1785	}
		1786
		1787	static int init_stall_timer(struct usb_hcd *hcd)
		1788	{
		1789	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1790
		1791	init_timer(&uhci->stall_timer);
		1792	uhci->stall_timer.function = stall_callback;
		1793	uhci->stall_timer.data = (unsigned long)hcd;
		1794	uhci->stall_timer.expires = jiffies26 + (HZ / 10);
		1795	add_timer(&uhci->stall_timer);
		1796
		1797	return 0;
		1798	}
		1799
		1800	static void uhci_free_pending_qhs(struct uhci_hcd *uhci)
		1801	{
		1802	struct list_head tmp, head;
		1803	unsigned long flags;
		1804
		1805	spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
		1806	head = &uhci->qh_remove_list;
		1807	tmp = head->next;
		1808	while (tmp != head) {
		1809	struct uhci_qh *qh = list_entry(tmp, struct uhci_qh, remove_list);
		1810
		1811	tmp = tmp->next;
		1812
		1813	list_del_init(&qh->remove_list);
		1814
		1815	uhci_free_qh(uhci, qh);
		1816	}
		1817	spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
		1818	}
		1819
		1820	static void uhci_free_pending_tds(struct uhci_hcd *uhci)
		1821	{
		1822	struct list_head tmp, head;
		1823	unsigned long flags;
		1824
		1825	spin_lock_irqsave(&uhci->td_remove_list_lock, flags);
		1826	head = &uhci->td_remove_list;
		1827	tmp = head->next;
		1828	while (tmp != head) {
		1829	struct uhci_td *td = list_entry(tmp, struct uhci_td, remove_list);
		1830
		1831	tmp = tmp->next;
		1832
		1833	list_del_init(&td->remove_list);
		1834
		1835	uhci_free_td(uhci, td);
		1836	}
		1837	spin_unlock_irqrestore(&uhci->td_remove_list_lock, flags);
		1838	}
		1839
		1840	static void uhci_finish_urb(struct usb_hcd hcd, struct urb urb, struct pt_regs *regs)
		1841	{
		1842	struct urb_priv urbp = (struct urb_priv )urb->hcpriv;
		1843	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1844	int status;
		1845	unsigned long flags;
		1846
		1847	spin_lock_irqsave(&urb->lock, flags);
		1848	status = urbp->status;
		1849	uhci_destroy_urb_priv(uhci, urb);
		1850
		1851	if (urb->status != -ENOENT && urb->status != -ECONNRESET)
		1852	urb->status = status;
		1853	spin_unlock_irqrestore(&urb->lock, flags);
		1854
		1855	usb_hcd_giveback_urb(hcd, urb, regs);
		1856	}
		1857
		1858	static void uhci_finish_completion(struct usb_hcd hcd, struct pt_regs regs)
		1859	{
		1860	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1861	struct list_head tmp, head;
		1862	unsigned long flags;
		1863
		1864	spin_lock_irqsave(&uhci->complete_list_lock, flags);
		1865	head = &uhci->complete_list;
		1866	tmp = head->next;
		1867	while (tmp != head) {
		1868	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, complete_list);
		1869	struct urb *urb = urbp->urb;
		1870
		1871	list_del_init(&urbp->complete_list);
		1872	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
		1873
		1874	uhci_finish_urb(hcd, urb, regs);
		1875
		1876	spin_lock_irqsave(&uhci->complete_list_lock, flags);
		1877	head = &uhci->complete_list;
		1878	tmp = head->next;
		1879	}
		1880	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
		1881	}
		1882
		1883	static void uhci_remove_pending_qhs(struct uhci_hcd *uhci)
		1884	{
		1885	struct list_head tmp, head;
		1886	unsigned long flags;
		1887
		1888	spin_lock_irqsave(&uhci->urb_remove_list_lock, flags);
		1889	head = &uhci->urb_remove_list;
		1890	tmp = head->next;
		1891	while (tmp != head) {
		1892	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
		1893	struct urb *urb = urbp->urb;
		1894
		1895	tmp = tmp->next;
		1896
		1897	list_del_init(&urbp->urb_list);
		1898
		1899	urbp->status = urb->status = -ECONNRESET;
		1900
		1901	uhci_add_complete(uhci, urb);
		1902	}
		1903	spin_unlock_irqrestore(&uhci->urb_remove_list_lock, flags);
		1904	}
		1905
		1906	static void uhci_irq(struct usb_hcd hcd, struct pt_regs regs)
		1907	{
		1908	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		1909	unsigned int io_addr = uhci->io_addr;
		1910	unsigned short status;
		1911	struct list_head tmp, head;
		1912
		1913	static int count =0;
		1914
		1915	/*
		1916	* Read the interrupt status, and write it back to clear the
		1917	* interrupt cause
		1918	*/
		1919	status = inw(io_addr + USBSTS);
		1920	if (!status) /* shared interrupt, not mine */
		1921	return;
		1922	outw(status, io_addr + USBSTS); /* Clear it */
		1923
		1924	// printk("%x uhci_irq\n", io_addr);
		1925
		1926	if (status & ~(USBSTS_USBINT \| USBSTS_ERROR \| USBSTS_RD)) {
		1927	if (status & USBSTS_HSE)
		1928	{
		1929	err("%x: host system error, PCI problems?", io_addr);
		1930	}
		1931	if (status & USBSTS_HCPE)
		1932	err("%x: host controller process error. something bad happened", io_addr);
		1933	if ((status & USBSTS_HCH) && uhci->state > 0) {
		1934	err("%x: host controller halted. very bad", io_addr);
		1935	/* FIXME: Reset the controller, fix the offending TD */
		1936	}
		1937	}
		1938
		1939	if (status & USBSTS_RD)
		1940	uhci->resume_detect = 1;
		1941
		1942	uhci_free_pending_qhs(uhci);
		1943
		1944	uhci_free_pending_tds(uhci);
		1945
		1946	uhci_remove_pending_qhs(uhci);
		1947
		1948	uhci_clear_next_interrupt(uhci);
		1949
		1950	/* Walk the list of pending URB's to see which ones completed */
		1951	spin_lock(&uhci->urb_list_lock);
		1952	head = &uhci->urb_list;
		1953	tmp = head->next;
		1954	while (tmp != head) {
		1955	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
		1956	struct urb *urb = urbp->urb;
		1957
		1958	tmp = tmp->next;
		1959
		1960	/* Checks the status and does all of the magic necessary */
		1961	uhci_transfer_result(uhci, urb);
		1962	}
		1963	spin_unlock(&uhci->urb_list_lock);
		1964
		1965	uhci_finish_completion(hcd, regs);
		1966	}
		1967
		1968	static void reset_hc(struct uhci_hcd *uhci)
		1969	{
		1970	unsigned int io_addr = uhci->io_addr;
		1971
		1972	/* Global reset for 50ms */
		1973	uhci->state = UHCI_RESET;
		1974	outw(USBCMD_GRESET, io_addr + USBCMD);
		1975	set_current_state(TASK_UNINTERRUPTIBLE);
		1976	schedule_timeout((HZ*50+999) / 1000);
		1977	outw(0, io_addr + USBCMD);
		1978
		1979	/* Another 10ms delay */
		1980	set_current_state(TASK_UNINTERRUPTIBLE);
		1981	schedule_timeout((HZ*10+999) / 1000);
		1982	uhci->resume_detect = 0;
		1983	}
		1984
		1985	static void suspend_hc(struct uhci_hcd *uhci)
		1986	{
		1987	unsigned int io_addr = uhci->io_addr;
		1988
		1989	dbg("%x: suspend_hc", io_addr);
		1990	uhci->state = UHCI_SUSPENDED;
		1991	uhci->resume_detect = 0;
		1992	outw(USBCMD_EGSM, io_addr + USBCMD);
		1993	}
		1994
		1995	static void wakeup_hc(struct uhci_hcd *uhci)
		1996	{
		1997	unsigned int io_addr = uhci->io_addr;
		1998
		1999	switch (uhci->state) {
		2000	case UHCI_SUSPENDED: /* Start the resume */
		2001	dbg("%x: wakeup_hc", io_addr);
		2002
		2003	/* Global resume for >= 20ms */
		2004	outw(USBCMD_FGR \| USBCMD_EGSM, io_addr + USBCMD);
		2005	uhci->state = UHCI_RESUMING_1;
		2006	uhci->state_end = jiffies26 + (20*HZ+999) / 1000;
		2007	break;
		2008
		2009	case UHCI_RESUMING_1: /* End global resume */
		2010	uhci->state = UHCI_RESUMING_2;
		2011	outw(0, io_addr + USBCMD);
		2012	/* Falls through */
		2013
		2014	case UHCI_RESUMING_2: /* Wait for EOP to be sent */
		2015	if (inw(io_addr + USBCMD) & USBCMD_FGR)
		2016	break;
		2017
		2018	/* Run for at least 1 second, and
		2019	* mark it configured with a 64-byte max packet */
		2020	uhci->state = UHCI_RUNNING_GRACE;
		2021	uhci->state_end = jiffies26 + HZ;
		2022	outw(USBCMD_RS \| USBCMD_CF \| USBCMD_MAXP,
		2023	io_addr + USBCMD);
		2024	break;
		2025
		2026	case UHCI_RUNNING_GRACE: /* Now allowed to suspend */
		2027	uhci->state = UHCI_RUNNING;
		2028	break;
		2029
		2030	default:
		2031	break;
		2032	}
		2033	}
		2034
		2035	static int ports_active(struct uhci_hcd *uhci)
		2036	{
		2037	unsigned int io_addr = uhci->io_addr;
		2038	int connection = 0;
		2039	int i;
		2040
		2041	for (i = 0; i < uhci->rh_numports; i++)
		2042	connection \|= (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_CCS);
		2043
		2044	return connection;
		2045	}
		2046
		2047	static int suspend_allowed(struct uhci_hcd *uhci)
		2048	{
		2049	unsigned int io_addr = uhci->io_addr;
		2050	int i;
		2051
		2052	if (!uhci->hcd.pdev \|\| uhci->hcd.pdev->vendor != PCI_VENDOR_ID_INTEL)
		2053	return 1;
		2054
		2055	/* Some of Intel's USB controllers have a bug that causes false
		2056	* resume indications if any port has an over current condition.
		2057	* To prevent problems, we will not allow a global suspend if
		2058	* any ports are OC.
		2059	*
		2060	* Some motherboards using Intel's chipsets (but not using all
		2061	* the USB ports) appear to hardwire the over current inputs active
		2062	* to disable the USB ports.
		2063	*/
		2064
		2065	/* check for over current condition on any port */
		2066	for (i = 0; i < uhci->rh_numports; i++) {
		2067	if (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_OC)
		2068	return 0;
		2069	}
		2070
		2071	return 1;
		2072	}
		2073
		2074	static void hc_state_transitions(struct uhci_hcd *uhci)
		2075	{
		2076	switch (uhci->state) {
		2077	case UHCI_RUNNING:
		2078
		2079	/* global suspend if nothing connected for 1 second */
		2080	if (!ports_active(uhci) && suspend_allowed(uhci)) {
		2081	uhci->state = UHCI_SUSPENDING_GRACE;
		2082	uhci->state_end = jiffies26 + HZ;
		2083	}
		2084	break;
		2085
		2086	case UHCI_SUSPENDING_GRACE:
		2087	if (ports_active(uhci))
		2088	uhci->state = UHCI_RUNNING;
		2089	else if (time_after_eq(jiffies26, uhci->state_end))
		2090	suspend_hc(uhci);
		2091	break;
		2092
		2093	case UHCI_SUSPENDED:
		2094
		2095	/* wakeup if requested by a device */
		2096	if (uhci->resume_detect)
		2097	wakeup_hc(uhci);
		2098	break;
		2099
		2100	case UHCI_RESUMING_1:
		2101	case UHCI_RESUMING_2:
		2102	case UHCI_RUNNING_GRACE:
		2103	if (time_after_eq(jiffies26, uhci->state_end))
		2104	wakeup_hc(uhci);
		2105	break;
		2106
		2107	default:
		2108	break;
		2109	}
		2110	}
		2111
		2112	static void start_hc(struct uhci_hcd *uhci)
		2113	{
		2114	unsigned int io_addr = uhci->io_addr;
		2115	int timeout = 1000;
		2116
		2117	/*
		2118	* Reset the HC - this will force us to get a
		2119	* new notification of any already connected
		2120	* ports due to the virtual disconnect that it
		2121	* implies.
		2122	*/
		2123	outw(USBCMD_HCRESET, io_addr + USBCMD);
		2124	while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
		2125	if (!--timeout) {
		2126	printk(KERN_ERR "uhci: USBCMD_HCRESET timed out!\n");
		2127	break;
		2128	}
		2129	}
		2130
		2131	/* Turn on all interrupts */
		2132	outw(USBINTR_TIMEOUT \| USBINTR_RESUME \| USBINTR_IOC \| USBINTR_SP,
		2133	io_addr + USBINTR);
		2134
		2135	/* Start at frame 0 */
		2136	outw(0, io_addr + USBFRNUM);
		2137	outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
		2138
		2139	/* Run and mark it configured with a 64-byte max packet */
		2140	uhci->state = UHCI_RUNNING_GRACE;
		2141	uhci->state_end = jiffies26 + HZ;
		2142	outw(USBCMD_RS \| USBCMD_CF \| USBCMD_MAXP, io_addr + USBCMD);
		2143
		2144	uhci->hcd.state = USB_STATE_RUNNING;
		2145
		2146	#ifdef DEB
		2147	{
		2148	__u32 *tdp;
		2149	int i;
		2150	int status = inw(io_addr + USBSTS);
		2151	printk(KERN_INFO "[%x] Frame = %d Status =%x fl=%x\n", io_addr, inw(io_addr + USBFRNUM), status, uhci->fl->dma_handle);
		2152	for (i=0; i<20; i++)
		2153	{
		2154	int status = inw(io_addr + USBSTS);
		2155	wait_ms26(500);
		2156	tdp=(__u32*)uhci->fl->frame[i];
		2157	printk(KERN_INFO "[%x] Frame[%d] -> @%x = %x status=%x fl=%x\n", io_addr, i, uhci->fl->frame[i], *tdp, status, uhci->fl->dma_handle );
		2158	}
		2159	}
		2160	#endif
		2161
		2162	}
		2163
		2164	/*
		2165	* De-allocate all resources..
		2166	*/
		2167	static void release_uhci(struct uhci_hcd *uhci)
		2168	{
		2169	int i;
		2170
		2171	for (i = 0; i < UHCI_NUM_SKELQH; i++)
		2172	if (uhci->skelqh[i]) {
		2173	uhci_free_qh(uhci, uhci->skelqh[i]);
		2174	uhci->skelqh[i] = NULL;
		2175	}
		2176
		2177	if (uhci->term_td) {
		2178	uhci_free_td(uhci, uhci->term_td);
		2179	uhci->term_td = NULL;
		2180	}
		2181
		2182	if (uhci->qh_pool) {
		2183	pci_pool_destroy(uhci->qh_pool);
		2184	uhci->qh_pool = NULL;
		2185	}
		2186
		2187	if (uhci->td_pool) {
		2188	pci_pool_destroy(uhci->td_pool);
		2189	uhci->td_pool = NULL;
		2190	}
		2191
		2192	if (uhci->fl) {
		2193	pci_free_consistent(uhci->hcd.pdev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
		2194	uhci->fl = NULL;
		2195	}
		2196
		2197	#ifdef CONFIG_PROC_FS
		2198	if (uhci->proc_entry) {
		2199	remove_proc_entry(uhci->hcd.self.bus_name, uhci_proc_root);
		2200	uhci->proc_entry = NULL;
		2201	}
		2202	#endif
		2203	}
		2204
		2205	static int uhci_reset(struct usb_hcd *hcd)
		2206	{
		2207	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		2208
		2209	uhci->io_addr = (unsigned long) hcd->regs;
		2210
		2211	/* Turn off all interrupts 2.6.1 */
		2212	outw(0, uhci->io_addr + USBINTR);
		2213
		2214
		2215
		2216	/* Maybe kick BIOS off this hardware. Then reset, so we won't get
		2217	* interrupts from any previous setup.
		2218	*/
		2219	reset_hc(uhci);
		2220	pci_write_config_word(hcd->pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
		2221	return 0;
		2222	}
		2223
		2224	/*
		2225	* Allocate a frame list, and then setup the skeleton
		2226	*
		2227	* The hardware doesn't really know any difference
		2228	* in the queues, but the order does matter for the
		2229	* protocols higher up. The order is:
		2230	*
		2231	* - any isochronous events handled before any
		2232	* of the queues. We don't do that here, because
		2233	* we'll create the actual TD entries on demand.
		2234	* - The first queue is the interrupt queue.
		2235	* - The second queue is the control queue, split into low and high speed
		2236	* - The third queue is bulk queue.
		2237	* - The fourth queue is the bandwidth reclamation queue, which loops back
		2238	* to the high speed control queue.
		2239	*/
		2240	static int uhci_start(struct usb_hcd *hcd)
		2241	{
		2242	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		2243	int retval = -EBUSY;
		2244	int i, port;
		2245	unsigned io_size;
		2246	dma_addr_t dma_handle;
		2247	struct usb_device *udev;
		2248	#ifdef CONFIG_PROC_FS
		2249	struct proc_dir_entry *ent;
		2250	#endif
		2251
		2252	io_size = pci_resource_len(hcd->pdev, hcd->region);
		2253
		2254	#ifdef CONFIG_PROC_FS
		2255	ent = create_proc_entry(hcd->self.bus_name, S_IFREG\|S_IRUGO\|S_IWUSR, uhci_proc_root);
		2256	if (!ent) {
		2257	err("couldn't create uhci proc entry");
		2258	retval = -ENOMEM;
		2259	goto err_create_proc_entry;
		2260	}
		2261
		2262	ent->data = uhci;
		2263	ent->proc_fops = &uhci_proc_operations;
		2264	ent->size = 0;
		2265	uhci->proc_entry = ent;
		2266	#endif
		2267
		2268	uhci->fsbr = 0;
		2269	uhci->fsbrtimeout = 0;
		2270
		2271	spin_lock_init(&uhci->qh_remove_list_lock);
		2272	INIT_LIST_HEAD(&uhci->qh_remove_list);
		2273
		2274	spin_lock_init(&uhci->td_remove_list_lock);
		2275	INIT_LIST_HEAD(&uhci->td_remove_list);
		2276
		2277	spin_lock_init(&uhci->urb_remove_list_lock);
		2278	INIT_LIST_HEAD(&uhci->urb_remove_list);
		2279
		2280	spin_lock_init(&uhci->urb_list_lock);
		2281	INIT_LIST_HEAD(&uhci->urb_list);
		2282
		2283	spin_lock_init(&uhci->complete_list_lock);
		2284	INIT_LIST_HEAD(&uhci->complete_list);
		2285
		2286	spin_lock_init(&uhci->frame_list_lock);
		2287
		2288	uhci->fl = pci_alloc_consistent_usb(hcd->pdev, sizeof(*uhci->fl), &dma_handle);
		2289	if (!uhci->fl) {
		2290	err("unable to allocate consistent memory for frame list");
		2291	goto err_alloc_fl;
		2292	}
		2293
		2294	memset((void )uhci->fl, 0, sizeof(uhci->fl));
		2295	uhci->fl->dma_handle = dma_handle;
		2296
		2297	uhci->td_pool = pci_pool_create("uhci_td", hcd->pdev,
		2298	sizeof(struct uhci_td), 16, 0);
		2299	if (!uhci->td_pool) {
		2300	err("unable to create td pci_pool");
		2301	goto err_create_td_pool;
		2302	}
		2303
		2304	uhci->qh_pool = pci_pool_create("uhci_qh", hcd->pdev,
		2305	sizeof(struct uhci_qh), 16, 0);
		2306	if (!uhci->qh_pool) {
		2307	err("unable to create qh pci_pool");
		2308	goto err_create_qh_pool;
		2309	}
		2310
		2311	/* Initialize the root hub */
		2312
		2313	/* UHCI specs says devices must have 2 ports, but goes on to say */
		2314	/* they may have more but give no way to determine how many they */
		2315	/* have. However, according to the UHCI spec, Bit 7 is always set */
		2316	/* to 1. So we try to use this to our advantage */
		2317	for (port = 0; port < (io_size - 0x10) / 2; port++) {
		2318	unsigned int portstatus;
		2319
		2320	portstatus = inw(uhci->io_addr + 0x10 + (port * 2));
		2321	if (!(portstatus & 0x0080))
		2322	break;
		2323	}
		2324	if (debug)
		2325	info("detected %d ports", port);
		2326
		2327	/* This is experimental so anything less than 2 or greater than 8 is */
		2328	/* something weird and we'll ignore it */
		2329	if (port < 2 \|\| port > 8) {
		2330	info("port count misdetected? forcing to 2 ports");
		2331	port = 2;
		2332	}
		2333
		2334	uhci->rh_numports = port;
		2335
		2336	hcd->self.root_hub = udev = usb_alloc_dev(NULL, &hcd->self);
		2337	if (!udev) {
		2338	err("unable to allocate root hub");
		2339	goto err_alloc_root_hub;
		2340	}
		2341
		2342	uhci->term_td = uhci_alloc_td(uhci, udev);
		2343	if (!uhci->term_td) {
		2344	err("unable to allocate terminating TD");
		2345	goto err_alloc_term_td;
		2346	}
		2347
		2348	for (i = 0; i < UHCI_NUM_SKELQH; i++) {
		2349	uhci->skelqh[i] = uhci_alloc_qh(uhci, udev);
		2350	if (!uhci->skelqh[i]) {
		2351	err("unable to allocate QH %d", i);
		2352	goto err_alloc_skelqh;
		2353	}
		2354	}
		2355
		2356	/*
		2357	* 8 Interrupt queues; link int2 to int1, int4 to int2, etc
		2358	* then link int1 to control and control to bulk
		2359	*/
		2360	uhci->skel_int128_qh->link = cpu_to_le32(uhci->skel_int64_qh->dma_handle) \| UHCI_PTR_QH;
		2361	uhci->skel_int64_qh->link = cpu_to_le32(uhci->skel_int32_qh->dma_handle) \| UHCI_PTR_QH;
		2362	uhci->skel_int32_qh->link = cpu_to_le32(uhci->skel_int16_qh->dma_handle) \| UHCI_PTR_QH;
		2363	uhci->skel_int16_qh->link = cpu_to_le32(uhci->skel_int8_qh->dma_handle) \| UHCI_PTR_QH;
		2364	uhci->skel_int8_qh->link = cpu_to_le32(uhci->skel_int4_qh->dma_handle) \| UHCI_PTR_QH;
		2365	uhci->skel_int4_qh->link = cpu_to_le32(uhci->skel_int2_qh->dma_handle) \| UHCI_PTR_QH;
		2366	uhci->skel_int2_qh->link = cpu_to_le32(uhci->skel_int1_qh->dma_handle) \| UHCI_PTR_QH;
		2367	uhci->skel_int1_qh->link = cpu_to_le32(uhci->skel_ls_control_qh->dma_handle) \| UHCI_PTR_QH;
		2368
		2369	uhci->skel_ls_control_qh->link = cpu_to_le32(uhci->skel_hs_control_qh->dma_handle) \| UHCI_PTR_QH;
		2370	uhci->skel_hs_control_qh->link = cpu_to_le32(uhci->skel_bulk_qh->dma_handle) \| UHCI_PTR_QH;
		2371	uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) \| UHCI_PTR_QH;
		2372
		2373	/* This dummy TD is to work around a bug in Intel PIIX controllers */
		2374	uhci_fill_td(uhci->term_td, 0, (UHCI_NULL_DATA_SIZE << 21) \|
		2375	(0x7f << TD_TOKEN_DEVADDR_SHIFT) \| USB_PID_IN, 0);
		2376	uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
		2377
		2378	uhci->skel_term_qh->link = UHCI_PTR_TERM;
		2379	uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
		2380
		2381	/*
		2382	* Fill the frame list: make all entries point to
		2383	* the proper interrupt queue.
		2384	*
		2385	* This is probably silly, but it's a simple way to
		2386	* scatter the interrupt queues in a way that gives
		2387	* us a reasonable dynamic range for irq latencies.
		2388	*/
		2389	for (i = 0; i < UHCI_NUMFRAMES; i++) {
		2390	int irq = 0;
		2391
		2392	if (i & 1) {
		2393	irq++;
		2394	if (i & 2) {
		2395	irq++;
		2396	if (i & 4) {
		2397	irq++;
		2398	if (i & 8) {
		2399	irq++;
		2400	if (i & 16) {
		2401	irq++;
		2402	if (i & 32) {
		2403	irq++;
		2404	if (i & 64)
		2405	irq++;
		2406	}
		2407	}
		2408	}
		2409	}
		2410	}
		2411	}
		2412
		2413	/* Only place we don't use the frame list routines */
		2414	uhci->fl->frame[i] = cpu_to_le32(uhci->skelqh[7 - irq]->dma_handle);
		2415	}
		2416
		2417	start_hc(uhci);
		2418
		2419	init_stall_timer(hcd);
		2420
		2421	udev->speed = USB_SPEED_FULL;
		2422
		2423	if (usb_register_root_hub(udev, &hcd->pdev->dev) != 0) {
		2424	err("unable to start root hub");
		2425	retval = -ENOMEM;
		2426	goto err_start_root_hub;
		2427	}
		2428
		2429	return 0;
		2430
		2431	/*
		2432	* error exits:
		2433	*/
		2434	err_start_root_hub:
		2435	reset_hc(uhci);
		2436
		2437	del_timer_sync(&uhci->stall_timer);
		2438
		2439	err_alloc_skelqh:
		2440	for (i = 0; i < UHCI_NUM_SKELQH; i++)
		2441	if (uhci->skelqh[i]) {
		2442	uhci_free_qh(uhci, uhci->skelqh[i]);
		2443	uhci->skelqh[i] = NULL;
		2444	}
		2445
		2446	uhci_free_td(uhci, uhci->term_td);
		2447	uhci->term_td = NULL;
		2448
		2449	err_alloc_term_td:
		2450	usb_put_dev(udev);
		2451	hcd->self.root_hub = NULL;
		2452
		2453	err_alloc_root_hub:
		2454	pci_pool_destroy(uhci->qh_pool);
		2455	uhci->qh_pool = NULL;
		2456
		2457	err_create_qh_pool:
		2458	pci_pool_destroy(uhci->td_pool);
		2459	uhci->td_pool = NULL;
		2460
		2461	err_create_td_pool:
		2462	pci_free_consistent(hcd->pdev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
		2463	uhci->fl = NULL;
		2464
		2465	err_alloc_fl:
		2466	#ifdef CONFIG_PROC_FS
		2467	remove_proc_entry(hcd->self.bus_name, uhci_proc_root);
		2468	uhci->proc_entry = NULL;
		2469
		2470	err_create_proc_entry:
		2471	#endif
		2472
		2473	return retval;
		2474	}
		2475
		2476	static void uhci_stop(struct usb_hcd *hcd)
		2477	{
		2478	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		2479
		2480	del_timer_sync(&uhci->stall_timer);
		2481
		2482	/*
		2483	* At this point, we're guaranteed that no new connects can be made
		2484	* to this bus since there are no more parents
		2485	*/
		2486	uhci_free_pending_qhs(uhci);
		2487	uhci_free_pending_tds(uhci);
		2488	uhci_remove_pending_qhs(uhci);
		2489
		2490	reset_hc(uhci);
		2491
		2492	uhci_free_pending_qhs(uhci);
		2493	uhci_free_pending_tds(uhci);
		2494
		2495	release_uhci(uhci);
		2496	}
		2497
		2498	#ifdef CONFIG_PM
		2499	static int uhci_suspend(struct usb_hcd *hcd, u32 state)
		2500	{
		2501	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		2502
		2503	/* Don't try to suspend broken motherboards, reset instead */
		2504	if (suspend_allowed(uhci))
		2505	suspend_hc(uhci);
		2506	else
		2507	reset_hc(uhci);
		2508	return 0;
		2509	}
		2510
		2511	static int uhci_resume(struct usb_hcd *hcd)
		2512	{
		2513	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
		2514
		2515	pci_set_master(uhci->hcd.pdev);
		2516
		2517	if (uhci->state == UHCI_SUSPENDED)
		2518	uhci->resume_detect = 1;
		2519	else {
		2520	reset_hc(uhci);
		2521	start_hc(uhci);
		2522	}
		2523	uhci->hcd.state = USB_STATE_RUNNING;
		2524	return 0;
		2525	}
		2526	#endif
		2527
		2528	static struct usb_hcd *uhci_hcd_alloc(void)
		2529	{
		2530	struct uhci_hcd *uhci;
		2531
		2532	uhci = (struct uhci_hcd )kmalloc(sizeof(uhci), GFP_KERNEL);
		2533	if (!uhci)
		2534	return NULL;
		2535
		2536	memset(uhci, 0, sizeof(*uhci));
		2537	uhci->hcd.product_desc = "UHCI Host Controller";
		2538	return &uhci->hcd;
		2539	}
		2540
		2541	static void uhci_hcd_free(struct usb_hcd *hcd)
		2542	{
		2543	kfree(hcd_to_uhci(hcd));
		2544	}
		2545
		2546	static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
		2547	{
		2548	return uhci_get_current_frame_number(hcd_to_uhci(hcd));
		2549	}
		2550
		2551	static const char hcd_name[] = "uhci_hcd";
		2552
		2553	static const struct hc_driver uhci_driver = {
		2554	.description = hcd_name,
		2555
		2556	/* Generic hardware linkage */
		2557	.irq = uhci_irq,
		2558	.flags = HCD_USB11,
		2559
		2560	/* Basic lifecycle operations */
		2561	.reset = uhci_reset,
		2562	.start = uhci_start,
		2563	#ifdef CONFIG_PM
		2564	.suspend = uhci_suspend,
		2565	.resume = uhci_resume,
		2566	#endif
		2567	.stop = uhci_stop,
		2568
		2569	.hcd_alloc = uhci_hcd_alloc,
		2570	.hcd_free = uhci_hcd_free,
		2571
		2572	.urb_enqueue = uhci_urb_enqueue,
		2573	.urb_dequeue = uhci_urb_dequeue,
		2574
		2575	.get_frame_number = uhci_hcd_get_frame_number,
		2576
		2577	.hub_status_data = uhci_hub_status_data,
		2578	.hub_control = uhci_hub_control,
		2579	};
		2580
		2581	static const struct pci_device_id uhci_pci_ids[] = { {
		2582	/* handle any USB UHCI controller */
		2583	PCI_DEVICE_CLASS(((PCI_CLASS_SERIAL_USB << 8) \| 0x00), ~0),
		2584	.driver_data = (unsigned long) &uhci_driver,
		2585	}, { /* end: all zeroes */ }
		2586	};
		2587
		2588	MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
		2589
		2590	static struct pci_driver uhci_pci_driver = {
		2591	.name = (char *)hcd_name,
		2592	.id_table = uhci_pci_ids,
		2593
		2594	.probe = usb_hcd_pci_probe,
		2595	.remove = usb_hcd_pci_remove,
		2596
		2597	#ifdef CONFIG_PM
		2598	.suspend = usb_hcd_pci_suspend,
		2599	.resume = usb_hcd_pci_resume,
		2600	#endif /* PM */
		2601	};
		2602
		2603	/static/ int __init uhci_hcd_init(void)
		2604	{
		2605	int retval = -ENOMEM;
		2606
		2607	info(DRIVER_DESC " " DRIVER_VERSION);
		2608
		2609	if (usb_disabled())
		2610	return -ENODEV;
		2611
		2612	if (debug) {
		2613	errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
		2614	if (!errbuf)
		2615	goto errbuf_failed;
		2616	}
		2617
		2618	#ifdef CONFIG_PROC_FS
		2619	uhci_proc_root = create_proc_entry("driver/uhci", S_IFDIR, 0);
		2620	if (!uhci_proc_root)
		2621	goto proc_failed;
		2622	#endif
		2623
		2624	//** uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
		2625	//** sizeof(struct urb_priv), 0, 0, NULL, NULL);
		2626	//** if (!uhci_up_cachep)
		2627	//** goto up_failed;
		2628
		2629	retval = pci_module_init(&uhci_pci_driver);
		2630	if (retval)
		2631	goto init_failed;
		2632
		2633	return 0;
		2634
		2635	init_failed:
		2636	//** if (kmem_cache_destroy(uhci_up_cachep))
		2637	//** printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
		2638
		2639	up_failed:
		2640
		2641	#ifdef CONFIG_PROC_FS
		2642	remove_proc_entry("driver/uhci", 0);
		2643
		2644	proc_failed:
		2645	#endif
		2646	if (errbuf)
		2647	kfree(errbuf);
		2648
		2649	errbuf_failed:
		2650
		2651	return retval;
		2652	}
		2653
		2654	/static/ void __exit uhci_hcd_cleanup(void)
		2655	{
		2656	pci_unregister_driver(&uhci_pci_driver);
		2657
		2658	//** if (kmem_cache_destroy(uhci_up_cachep))
		2659	//** printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
		2660
		2661	#ifdef CONFIG_PROC_FS
		2662	remove_proc_entry("driver/uhci", 0);
		2663	#endif
		2664
		2665	if (errbuf)
		2666	kfree(errbuf);
		2667	}
		2668
		2669	module_init(uhci_hcd_init);
		2670	module_exit(uhci_hcd_cleanup);
		2671
		2672	MODULE_AUTHOR(DRIVER_AUTHOR);
		2673	MODULE_DESCRIPTION(DRIVER_DESC);
		2674	MODULE_LICENSE("GPL");
		2675

Subversion Repositories shark

(root)/shark/trunk/drivers/usb/host/uhci-hcd.c - Rev 1049