patch-2.4.21 linux-2.4.21/drivers/usb/uhci.c
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- Lines: 3173
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.20/drivers/usb/uhci.c
- Orig date:
2002-11-28 15:53:15.000000000 -0800
diff -urN linux-2.4.20/drivers/usb/uhci.c linux-2.4.21/drivers/usb/uhci.c
@@ -1,3172 +0,0 @@
-/*
- * Universal Host Controller Interface driver for USB.
- *
- * Maintainer: Johannes Erdfelt <johannes@erdfelt.com>
- *
- * (C) Copyright 1999 Linus Torvalds
- * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
- * (C) Copyright 1999 Randy Dunlap
- * (C) Copyright 1999 Georg Acher, acher@in.tum.de
- * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
- * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
- * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
- * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
- * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
- * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
- *
- * Intel documents this fairly well, and as far as I know there
- * are no royalties or anything like that, but even so there are
- * people who decided that they want to do the same thing in a
- * completely different way.
- *
- * WARNING! The USB documentation is downright evil. Most of it
- * is just crap, written by a committee. You're better off ignoring
- * most of it, the important stuff is:
- * - the low-level protocol (fairly simple but lots of small details)
- * - working around the horridness of the rest
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/smp_lock.h>
-#include <linux/errno.h>
-#include <linux/unistd.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include <linux/proc_fs.h>
-#ifdef CONFIG_USB_DEBUG
-#define DEBUG
-#else
-#undef DEBUG
-#endif
-#include <linux/usb.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-
-#include "uhci.h"
-
-#include <linux/pm.h>
-
-#include "hcd.h"
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v1.1"
-#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber"
-#define DRIVER_DESC "USB Universal Host Controller Interface driver"
-
-/*
- * debug = 0, no debugging messages
- * debug = 1, dump failed URB's except for stalls
- * debug = 2, dump all failed URB's (including stalls)
- * show all queues in /proc/uhci/hc*
- * debug = 3, show all TD's in URB's when dumping
- */
-#ifdef DEBUG
-static int debug = 1;
-#else
-static int debug = 0;
-#endif
-MODULE_PARM(debug, "i");
-MODULE_PARM_DESC(debug, "Debug level");
-static char *errbuf;
-#define ERRBUF_LEN (PAGE_SIZE * 8)
-
-#include "uhci-debug.h"
-
-static kmem_cache_t *uhci_up_cachep; /* urb_priv */
-
-static int rh_submit_urb(struct urb *urb);
-static int rh_unlink_urb(struct urb *urb);
-static int uhci_get_current_frame_number(struct usb_device *dev);
-static int uhci_unlink_urb(struct urb *urb);
-static void uhci_unlink_generic(struct uhci *uhci, struct urb *urb);
-static void uhci_call_completion(struct urb *urb);
-
-static int ports_active(struct uhci *uhci);
-static void suspend_hc(struct uhci *uhci);
-static void wakeup_hc(struct uhci *uhci);
-
-/* If a transfer is still active after this much time, turn off FSBR */
-#define IDLE_TIMEOUT (HZ / 20) /* 50 ms */
-#define FSBR_DELAY (HZ / 20) /* 50 ms */
-
-/* When we timeout an idle transfer for FSBR, we'll switch it over to */
-/* depth first traversal. We'll do it in groups of this number of TD's */
-/* to make sure it doesn't hog all of the bandwidth */
-#define DEPTH_INTERVAL 5
-
-#define MAX_URB_LOOP 2048 /* Maximum number of linked URB's */
-
-/*
- * Only the USB core should call uhci_alloc_dev and uhci_free_dev
- */
-static int uhci_alloc_dev(struct usb_device *dev)
-{
- return 0;
-}
-
-static int uhci_free_dev(struct usb_device *dev)
-{
- return 0;
-}
-
-/*
- * Technically, updating td->status here is a race, but it's not really a
- * problem. The worst that can happen is that we set the IOC bit again
- * generating a spurios interrupt. We could fix this by creating another
- * QH and leaving the IOC bit always set, but then we would have to play
- * games with the FSBR code to make sure we get the correct order in all
- * the cases. I don't think it's worth the effort
- */
-static inline void uhci_set_next_interrupt(struct uhci *uhci)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
- uhci->skel_term_td->status |= TD_CTRL_IOC;
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static inline void uhci_clear_next_interrupt(struct uhci *uhci)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
- uhci->skel_term_td->status &= ~TD_CTRL_IOC;
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static inline void uhci_add_complete(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->complete_list_lock, flags);
- list_add(&urbp->complete_list, &uhci->complete_list);
- spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
-}
-
-static struct uhci_td *uhci_alloc_td(struct uhci *uhci, struct usb_device *dev)
-{
- dma_addr_t dma_handle;
- struct uhci_td *td;
-
- td = pci_pool_alloc(uhci->td_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
- if (!td)
- return NULL;
-
- td->dma_handle = dma_handle;
-
- td->link = UHCI_PTR_TERM;
- td->buffer = 0;
-
- td->frame = -1;
- td->dev = dev;
-
- INIT_LIST_HEAD(&td->list);
- INIT_LIST_HEAD(&td->fl_list);
-
- usb_inc_dev_use(dev);
-
- return td;
-}
-
-static void inline uhci_fill_td(struct uhci_td *td, __u32 status,
- __u32 info, __u32 buffer)
-{
- td->status = status;
- td->info = info;
- td->buffer = buffer;
-}
-
-static void uhci_insert_td(struct uhci *uhci, struct uhci_td *skeltd, struct uhci_td *td)
-{
- unsigned long flags;
- struct uhci_td *ltd;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- ltd = list_entry(skeltd->fl_list.prev, struct uhci_td, fl_list);
-
- td->link = ltd->link;
- mb();
- ltd->link = td->dma_handle;
-
- list_add_tail(&td->fl_list, &skeltd->fl_list);
-
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-/*
- * We insert Isochronous transfers directly into the frame list at the
- * beginning
- * The layout looks as follows:
- * frame list pointer -> iso td's (if any) ->
- * periodic interrupt td (if frame 0) -> irq td's -> control qh -> bulk qh
- */
-static void uhci_insert_td_frame_list(struct uhci *uhci, struct uhci_td *td, unsigned framenum)
-{
- unsigned long flags;
-
- framenum %= UHCI_NUMFRAMES;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- td->frame = framenum;
-
- /* Is there a TD already mapped there? */
- if (uhci->fl->frame_cpu[framenum]) {
- struct uhci_td *ftd, *ltd;
-
- ftd = uhci->fl->frame_cpu[framenum];
- ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
-
- list_add_tail(&td->fl_list, &ftd->fl_list);
-
- td->link = ltd->link;
- mb();
- ltd->link = td->dma_handle;
- } else {
- td->link = uhci->fl->frame[framenum];
- mb();
- uhci->fl->frame[framenum] = td->dma_handle;
- uhci->fl->frame_cpu[framenum] = td;
- }
-
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static void uhci_remove_td(struct uhci *uhci, struct uhci_td *td)
-{
- unsigned long flags;
-
- /* If it's not inserted, don't remove it */
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
- if (td->frame == -1 && list_empty(&td->fl_list))
- goto out;
-
- if (td->frame != -1 && uhci->fl->frame_cpu[td->frame] == td) {
- if (list_empty(&td->fl_list)) {
- uhci->fl->frame[td->frame] = td->link;
- uhci->fl->frame_cpu[td->frame] = NULL;
- } else {
- struct uhci_td *ntd;
-
- ntd = list_entry(td->fl_list.next, struct uhci_td, fl_list);
- uhci->fl->frame[td->frame] = ntd->dma_handle;
- uhci->fl->frame_cpu[td->frame] = ntd;
- }
- } else {
- struct uhci_td *ptd;
-
- ptd = list_entry(td->fl_list.prev, struct uhci_td, fl_list);
- ptd->link = td->link;
- }
-
- mb();
- td->link = UHCI_PTR_TERM;
-
- list_del_init(&td->fl_list);
- td->frame = -1;
-
-out:
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-/*
- * Inserts a td into qh list at the top.
- */
-static void uhci_insert_tds_in_qh(struct uhci_qh *qh, struct urb *urb, int breadth)
-{
- struct list_head *tmp, *head;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct uhci_td *td, *ptd;
-
- if (list_empty(&urbp->td_list))
- return;
-
- head = &urbp->td_list;
- tmp = head->next;
-
- /* Ordering isn't important here yet since the QH hasn't been */
- /* inserted into the schedule yet */
- td = list_entry(tmp, struct uhci_td, list);
-
- /* Add the first TD to the QH element pointer */
- qh->element = td->dma_handle | (breadth ? 0 : UHCI_PTR_DEPTH);
-
- ptd = td;
-
- /* Then link the rest of the TD's */
- tmp = tmp->next;
- while (tmp != head) {
- td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- ptd->link = td->dma_handle | (breadth ? 0 : UHCI_PTR_DEPTH);
-
- ptd = td;
- }
-
- ptd->link = UHCI_PTR_TERM;
-}
-
-static void uhci_free_td(struct uhci *uhci, struct uhci_td *td)
-{
- if (!list_empty(&td->list) || !list_empty(&td->fl_list))
- dbg("td is still in URB list!");
-
- if (td->dev)
- usb_dec_dev_use(td->dev);
-
- pci_pool_free(uhci->td_pool, td, td->dma_handle);
-}
-
-static struct uhci_qh *uhci_alloc_qh(struct uhci *uhci, struct usb_device *dev)
-{
- dma_addr_t dma_handle;
- struct uhci_qh *qh;
-
- qh = pci_pool_alloc(uhci->qh_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
- if (!qh)
- return NULL;
-
- qh->dma_handle = dma_handle;
-
- qh->element = UHCI_PTR_TERM;
- qh->link = UHCI_PTR_TERM;
-
- qh->dev = dev;
- qh->urbp = NULL;
-
- INIT_LIST_HEAD(&qh->list);
- INIT_LIST_HEAD(&qh->remove_list);
-
- usb_inc_dev_use(dev);
-
- return qh;
-}
-
-static void uhci_free_qh(struct uhci *uhci, struct uhci_qh *qh)
-{
- if (!list_empty(&qh->list))
- dbg("qh list not empty!");
- if (!list_empty(&qh->remove_list))
- dbg("qh still in remove_list!");
-
- if (qh->dev)
- usb_dec_dev_use(qh->dev);
-
- pci_pool_free(uhci->qh_pool, qh, qh->dma_handle);
-}
-
-/*
- * MUST be called with uhci->frame_list_lock acquired
- */
-static void _uhci_insert_qh(struct uhci *uhci, struct uhci_qh *skelqh, struct urb *urb)
-{
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct list_head *head, *tmp;
- struct uhci_qh *lqh;
-
- /* Grab the last QH */
- lqh = list_entry(skelqh->list.prev, struct uhci_qh, list);
-
- if (lqh->urbp) {
- head = &lqh->urbp->queue_list;
- tmp = head->next;
- while (head != tmp) {
- struct urb_priv *turbp =
- list_entry(tmp, struct urb_priv, queue_list);
-
- tmp = tmp->next;
-
- turbp->qh->link = urbp->qh->dma_handle | UHCI_PTR_QH;
- }
- }
-
- head = &urbp->queue_list;
- tmp = head->next;
- while (head != tmp) {
- struct urb_priv *turbp =
- list_entry(tmp, struct urb_priv, queue_list);
-
- tmp = tmp->next;
-
- turbp->qh->link = lqh->link;
- }
-
- urbp->qh->link = lqh->link;
- mb(); /* Ordering is important */
- lqh->link = urbp->qh->dma_handle | UHCI_PTR_QH;
-
- list_add_tail(&urbp->qh->list, &skelqh->list);
-}
-
-static void uhci_insert_qh(struct uhci *uhci, struct uhci_qh *skelqh, struct urb *urb)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
- _uhci_insert_qh(uhci, skelqh, urb);
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static void uhci_remove_qh(struct uhci *uhci, struct uhci_qh *qh)
-{
- unsigned long flags;
- struct uhci_qh *pqh;
-
- if (!qh)
- return;
-
- qh->urbp = NULL;
-
- /* Only go through the hoops if it's actually linked in */
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
- if (!list_empty(&qh->list)) {
- pqh = list_entry(qh->list.prev, struct uhci_qh, list);
-
- if (pqh->urbp) {
- struct list_head *head, *tmp;
-
- head = &pqh->urbp->queue_list;
- tmp = head->next;
- while (head != tmp) {
- struct urb_priv *turbp =
- list_entry(tmp, struct urb_priv, queue_list);
-
- tmp = tmp->next;
-
- turbp->qh->link = qh->link;
- }
- }
-
- pqh->link = qh->link;
- mb();
- qh->element = qh->link = UHCI_PTR_TERM;
-
- list_del_init(&qh->list);
- }
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-
- spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
-
- /* Check to see if the remove list is empty. Set the IOC bit */
- /* to force an interrupt so we can remove the QH */
- if (list_empty(&uhci->qh_remove_list))
- uhci_set_next_interrupt(uhci);
-
- list_add(&qh->remove_list, &uhci->qh_remove_list);
-
- spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
-}
-
-static int uhci_fixup_toggle(struct urb *urb, unsigned int toggle)
-{
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct list_head *head, *tmp;
-
- head = &urbp->td_list;
- tmp = head->next;
- while (head != tmp) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- if (toggle)
- td->info |= TD_TOKEN_TOGGLE;
- else
- td->info &= ~TD_TOKEN_TOGGLE;
-
- toggle ^= 1;
- }
-
- return toggle;
-}
-
-/* This function will append one URB's QH to another URB's QH. This is for */
-/* USB_QUEUE_BULK support for bulk transfers and soon implicitily for */
-/* control transfers */
-static void uhci_append_queued_urb(struct uhci *uhci, struct urb *eurb, struct urb *urb)
-{
- struct urb_priv *eurbp, *urbp, *furbp, *lurbp;
- struct list_head *tmp;
- struct uhci_td *lltd;
- unsigned long flags;
-
- eurbp = eurb->hcpriv;
- urbp = urb->hcpriv;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- /* Find the first URB in the queue */
- if (eurbp->queued) {
- struct list_head *head = &eurbp->queue_list;
-
- tmp = head->next;
- while (tmp != head) {
- struct urb_priv *turbp =
- list_entry(tmp, struct urb_priv, queue_list);
-
- if (!turbp->queued)
- break;
-
- tmp = tmp->next;
- }
- } else
- tmp = &eurbp->queue_list;
-
- furbp = list_entry(tmp, struct urb_priv, queue_list);
- lurbp = list_entry(furbp->queue_list.prev, struct urb_priv, queue_list);
-
- lltd = list_entry(lurbp->td_list.prev, struct uhci_td, list);
-
- usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe),
- uhci_fixup_toggle(urb, uhci_toggle(lltd->info) ^ 1));
-
- /* All qh's in the queue need to link to the next queue */
- urbp->qh->link = eurbp->qh->link;
-
- mb(); /* Make sure we flush everything */
- /* Only support bulk right now, so no depth */
- lltd->link = urbp->qh->dma_handle | UHCI_PTR_QH;
-
- list_add_tail(&urbp->queue_list, &furbp->queue_list);
-
- urbp->queued = 1;
-
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static void uhci_delete_queued_urb(struct uhci *uhci, struct urb *urb)
-{
- struct urb_priv *urbp, *nurbp;
- struct list_head *head, *tmp;
- struct urb_priv *purbp;
- struct uhci_td *pltd;
- unsigned int toggle;
- unsigned long flags;
-
- urbp = urb->hcpriv;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- if (list_empty(&urbp->queue_list))
- goto out;
-
- nurbp = list_entry(urbp->queue_list.next, struct urb_priv, queue_list);
-
- /* Fix up the toggle for the next URB's */
- if (!urbp->queued)
- /* We set the toggle when we unlink */
- toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
- else {
- /* If we're in the middle of the queue, grab the toggle */
- /* from the TD previous to us */
- purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
- queue_list);
-
- pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
-
- toggle = uhci_toggle(pltd->info) ^ 1;
- }
-
- head = &urbp->queue_list;
- tmp = head->next;
- while (head != tmp) {
- struct urb_priv *turbp;
-
- turbp = list_entry(tmp, struct urb_priv, queue_list);
-
- tmp = tmp->next;
-
- if (!turbp->queued)
- break;
-
- toggle = uhci_fixup_toggle(turbp->urb, toggle);
- }
-
- usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe), toggle);
-
- if (!urbp->queued) {
- nurbp->queued = 0;
-
- _uhci_insert_qh(uhci, uhci->skel_bulk_qh, nurbp->urb);
- } else {
- /* We're somewhere in the middle (or end). A bit trickier */
- /* than the head scenario */
- purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
- queue_list);
-
- pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
- if (nurbp->queued)
- pltd->link = nurbp->qh->dma_handle | UHCI_PTR_QH;
- else
- /* The next URB happens to be the beginning, so */
- /* we're the last, end the chain */
- pltd->link = UHCI_PTR_TERM;
- }
-
- list_del_init(&urbp->queue_list);
-
-out:
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static struct urb_priv *uhci_alloc_urb_priv(struct uhci *uhci, struct urb *urb)
-{
- struct urb_priv *urbp;
-
- urbp = kmem_cache_alloc(uhci_up_cachep, SLAB_ATOMIC);
- if (!urbp) {
- err("uhci_alloc_urb_priv: couldn't allocate memory for urb_priv\n");
- return NULL;
- }
-
- memset((void *)urbp, 0, sizeof(*urbp));
-
- urbp->inserttime = jiffies;
- urbp->fsbrtime = jiffies;
- urbp->urb = urb;
- urbp->dev = urb->dev;
-
- INIT_LIST_HEAD(&urbp->td_list);
- INIT_LIST_HEAD(&urbp->queue_list);
- INIT_LIST_HEAD(&urbp->complete_list);
-
- urb->hcpriv = urbp;
-
- if (urb->dev != uhci->rh.dev) {
- if (urb->transfer_buffer_length) {
- urbp->transfer_buffer_dma_handle = pci_map_single(uhci->dev,
- urb->transfer_buffer, urb->transfer_buffer_length,
- usb_pipein(urb->pipe) ? PCI_DMA_FROMDEVICE :
- PCI_DMA_TODEVICE);
- if (!urbp->transfer_buffer_dma_handle)
- return NULL;
- }
-
- if (usb_pipetype(urb->pipe) == PIPE_CONTROL && urb->setup_packet) {
- urbp->setup_packet_dma_handle = pci_map_single(uhci->dev,
- urb->setup_packet, sizeof(struct usb_ctrlrequest),
- PCI_DMA_TODEVICE);
- if (!urbp->setup_packet_dma_handle)
- return NULL;
- }
- }
-
- return urbp;
-}
-
-/*
- * MUST be called with urb->lock acquired
- */
-static void uhci_add_td_to_urb(struct urb *urb, struct uhci_td *td)
-{
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- td->urb = urb;
-
- list_add_tail(&td->list, &urbp->td_list);
-}
-
-/*
- * MUST be called with urb->lock acquired
- */
-static void uhci_remove_td_from_urb(struct uhci_td *td)
-{
- if (list_empty(&td->list))
- return;
-
- list_del_init(&td->list);
-
- td->urb = NULL;
-}
-
-/*
- * MUST be called with urb->lock acquired
- */
-static void uhci_destroy_urb_priv(struct urb *urb)
-{
- struct list_head *head, *tmp;
- struct urb_priv *urbp;
- struct uhci *uhci;
-
- urbp = (struct urb_priv *)urb->hcpriv;
- if (!urbp)
- return;
-
- if (!urbp->dev || !urbp->dev->bus || !urbp->dev->bus->hcpriv) {
- warn("uhci_destroy_urb_priv: urb %p belongs to disconnected device or bus?", urb);
- return;
- }
-
- if (!list_empty(&urb->urb_list))
- warn("uhci_destroy_urb_priv: urb %p still on uhci->urb_list or uhci->remove_list", urb);
-
- if (!list_empty(&urbp->complete_list))
- warn("uhci_destroy_urb_priv: urb %p still on uhci->complete_list", urb);
-
- uhci = urbp->dev->bus->hcpriv;
-
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- uhci_remove_td_from_urb(td);
- uhci_remove_td(uhci, td);
- uhci_free_td(uhci, td);
- }
-
- if (urbp->setup_packet_dma_handle) {
- pci_unmap_single(uhci->dev, urbp->setup_packet_dma_handle,
- sizeof(struct usb_ctrlrequest), PCI_DMA_TODEVICE);
- urbp->setup_packet_dma_handle = 0;
- }
-
- if (urbp->transfer_buffer_dma_handle) {
- pci_unmap_single(uhci->dev, urbp->transfer_buffer_dma_handle,
- urb->transfer_buffer_length, usb_pipein(urb->pipe) ?
- PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
- urbp->transfer_buffer_dma_handle = 0;
- }
-
- urb->hcpriv = NULL;
- kmem_cache_free(uhci_up_cachep, urbp);
-}
-
-static void uhci_inc_fsbr(struct uhci *uhci, struct urb *urb)
-{
- unsigned long flags;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- if ((!(urb->transfer_flags & USB_NO_FSBR)) && !urbp->fsbr) {
- urbp->fsbr = 1;
- if (!uhci->fsbr++ && !uhci->fsbrtimeout)
- uhci->skel_term_qh->link = uhci->skel_hs_control_qh->dma_handle | UHCI_PTR_QH;
- }
-
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-static void uhci_dec_fsbr(struct uhci *uhci, struct urb *urb)
-{
- unsigned long flags;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- spin_lock_irqsave(&uhci->frame_list_lock, flags);
-
- if ((!(urb->transfer_flags & USB_NO_FSBR)) && urbp->fsbr) {
- urbp->fsbr = 0;
- if (!--uhci->fsbr)
- uhci->fsbrtimeout = jiffies + FSBR_DELAY;
- }
-
- spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
-}
-
-/*
- * Map status to standard result codes
- *
- * <status> is (td->status & 0xFE0000) [a.k.a. uhci_status_bits(td->status)]
- * <dir_out> is True for output TDs and False for input TDs.
- */
-static int uhci_map_status(int status, int dir_out)
-{
- if (!status)
- return 0;
- if (status & TD_CTRL_BITSTUFF) /* Bitstuff error */
- return -EPROTO;
- if (status & TD_CTRL_CRCTIMEO) { /* CRC/Timeout */
- if (dir_out)
- return -ETIMEDOUT;
- else
- return -EILSEQ;
- }
- if (status & TD_CTRL_NAK) /* NAK */
- return -ETIMEDOUT;
- if (status & TD_CTRL_BABBLE) /* Babble */
- return -EOVERFLOW;
- if (status & TD_CTRL_DBUFERR) /* Buffer error */
- return -ENOSR;
- if (status & TD_CTRL_STALLED) /* Stalled */
- return -EPIPE;
- if (status & TD_CTRL_ACTIVE) /* Active */
- return 0;
-
- return -EINVAL;
-}
-
-/*
- * Control transfers
- */
-static int uhci_submit_control(struct urb *urb)
-{
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct uhci_td *td;
- struct uhci_qh *qh;
- unsigned long destination, status;
- int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
- int len = urb->transfer_buffer_length;
- dma_addr_t data = urbp->transfer_buffer_dma_handle;
-
- /* The "pipe" thing contains the destination in bits 8--18 */
- destination = (urb->pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;
-
- /* 3 errors */
- status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
-
- /*
- * Build the TD for the control request
- */
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | (7 << 21),
- urbp->setup_packet_dma_handle);
-
- /*
- * If direction is "send", change the frame from SETUP (0x2D)
- * to OUT (0xE1). Else change it from SETUP to IN (0x69).
- */
- destination ^= (USB_PID_SETUP ^ usb_packetid(urb->pipe));
-
- if (!(urb->transfer_flags & USB_DISABLE_SPD))
- status |= TD_CTRL_SPD;
-
- /*
- * Build the DATA TD's
- */
- while (len > 0) {
- int pktsze = len;
-
- if (pktsze > maxsze)
- pktsze = maxsze;
-
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- /* Alternate Data0/1 (start with Data1) */
- destination ^= TD_TOKEN_TOGGLE;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | ((pktsze - 1) << 21),
- data);
-
- data += pktsze;
- len -= pktsze;
- }
-
- /*
- * Build the final TD for control status
- */
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- /*
- * It's IN if the pipe is an output pipe or we're not expecting
- * data back.
- */
- destination &= ~TD_TOKEN_PID_MASK;
- if (usb_pipeout(urb->pipe) || !urb->transfer_buffer_length)
- destination |= USB_PID_IN;
- else
- destination |= USB_PID_OUT;
-
- destination |= TD_TOKEN_TOGGLE; /* End in Data1 */
-
- status &= ~TD_CTRL_SPD;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status | TD_CTRL_IOC,
- destination | (UHCI_NULL_DATA_SIZE << 21), 0);
-
- qh = uhci_alloc_qh(uhci, urb->dev);
- if (!qh)
- return -ENOMEM;
-
- urbp->qh = qh;
- qh->urbp = urbp;
-
- /* Low speed or small transfers gets a different queue and treatment */
- if (urb->pipe & TD_CTRL_LS) {
- uhci_insert_tds_in_qh(qh, urb, 0);
- uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
- } else {
- uhci_insert_tds_in_qh(qh, urb, 1);
- uhci_insert_qh(uhci, uhci->skel_hs_control_qh, urb);
- uhci_inc_fsbr(uhci, urb);
- }
-
- return -EINPROGRESS;
-}
-
-static int usb_control_retrigger_status(struct urb *urb);
-
-static int uhci_result_control(struct urb *urb)
-{
- struct list_head *tmp, *head;
- struct urb_priv *urbp = urb->hcpriv;
- struct uhci_td *td;
- unsigned int status;
- int ret = 0;
-
- if (list_empty(&urbp->td_list))
- return -EINVAL;
-
- head = &urbp->td_list;
-
- if (urbp->short_control_packet) {
- tmp = head->prev;
- goto status_phase;
- }
-
- tmp = head->next;
- td = list_entry(tmp, struct uhci_td, list);
-
- /* The first TD is the SETUP phase, check the status, but skip */
- /* the count */
- status = uhci_status_bits(td->status);
- if (status & TD_CTRL_ACTIVE)
- return -EINPROGRESS;
-
- if (status)
- goto td_error;
-
- urb->actual_length = 0;
-
- /* The rest of the TD's (but the last) are data */
- tmp = tmp->next;
- while (tmp != head && tmp->next != head) {
- td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- status = uhci_status_bits(td->status);
- if (status & TD_CTRL_ACTIVE)
- return -EINPROGRESS;
-
- urb->actual_length += uhci_actual_length(td->status);
-
- if (status)
- goto td_error;
-
- /* Check to see if we received a short packet */
- if (uhci_actual_length(td->status) < uhci_expected_length(td->info)) {
- if (urb->transfer_flags & USB_DISABLE_SPD) {
- ret = -EREMOTEIO;
- goto err;
- }
-
- if (uhci_packetid(td->info) == USB_PID_IN)
- return usb_control_retrigger_status(urb);
- else
- return 0;
- }
- }
-
-status_phase:
- td = list_entry(tmp, struct uhci_td, list);
-
- /* Control status phase */
- status = uhci_status_bits(td->status);
-
-#ifdef I_HAVE_BUGGY_APC_BACKUPS
- /* APC BackUPS Pro kludge */
- /* It tries to send all of the descriptor instead of the amount */
- /* we requested */
- if (td->status & TD_CTRL_IOC && /* IOC is masked out by uhci_status_bits */
- status & TD_CTRL_ACTIVE &&
- status & TD_CTRL_NAK)
- return 0;
-#endif
-
- if (status & TD_CTRL_ACTIVE)
- return -EINPROGRESS;
-
- if (status)
- goto td_error;
-
- return 0;
-
-td_error:
- ret = uhci_map_status(status, uhci_packetout(td->info));
- if (ret == -EPIPE)
- /* endpoint has stalled - mark it halted */
- usb_endpoint_halt(urb->dev, uhci_endpoint(td->info),
- uhci_packetout(td->info));
-
-err:
- if ((debug == 1 && ret != -EPIPE) || debug > 1) {
- /* Some debugging code */
- dbg("uhci_result_control() failed with status %x", status);
-
- if (errbuf) {
- /* Print the chain for debugging purposes */
- uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
-
- lprintk(errbuf);
- }
- }
-
- return ret;
-}
-
-static int usb_control_retrigger_status(struct urb *urb)
-{
- struct list_head *tmp, *head;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct uhci *uhci = urb->dev->bus->hcpriv;
-
- urbp->short_control_packet = 1;
-
- /* Create a new QH to avoid pointer overwriting problems */
- uhci_remove_qh(uhci, urbp->qh);
-
- /* Delete all of the TD's except for the status TD at the end */
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head && tmp->next != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- uhci_remove_td_from_urb(td);
- uhci_remove_td(uhci, td);
- uhci_free_td(uhci, td);
- }
-
- urbp->qh = uhci_alloc_qh(uhci, urb->dev);
- if (!urbp->qh) {
- err("unable to allocate new QH for control retrigger");
- return -ENOMEM;
- }
-
- urbp->qh->urbp = urbp;
-
- /* One TD, who cares about Breadth first? */
- uhci_insert_tds_in_qh(urbp->qh, urb, 0);
-
- /* Low speed or small transfers gets a different queue and treatment */
- if (urb->pipe & TD_CTRL_LS)
- uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
- else
- uhci_insert_qh(uhci, uhci->skel_hs_control_qh, urb);
-
- return -EINPROGRESS;
-}
-
-/*
- * Interrupt transfers
- */
-static int uhci_submit_interrupt(struct urb *urb)
-{
- struct uhci_td *td;
- unsigned long destination, status;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- if (urb->transfer_buffer_length > usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))
- return -EINVAL;
-
- /* The "pipe" thing contains the destination in bits 8--18 */
- destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
-
- status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC;
-
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- destination |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT);
- destination |= ((urb->transfer_buffer_length - 1) << 21);
-
- usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination, urbp->transfer_buffer_dma_handle);
-
- uhci_insert_td(uhci, uhci->skeltd[__interval_to_skel(urb->interval)], td);
-
- return -EINPROGRESS;
-}
-
-static int uhci_result_interrupt(struct urb *urb)
-{
- struct list_head *tmp, *head;
- struct urb_priv *urbp = urb->hcpriv;
- struct uhci_td *td;
- unsigned int status;
- int ret = 0;
-
- urb->actual_length = 0;
-
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head) {
- td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- status = uhci_status_bits(td->status);
- if (status & TD_CTRL_ACTIVE)
- return -EINPROGRESS;
-
- urb->actual_length += uhci_actual_length(td->status);
-
- if (status)
- goto td_error;
-
- if (uhci_actual_length(td->status) < uhci_expected_length(td->info)) {
- if (urb->transfer_flags & USB_DISABLE_SPD) {
- ret = -EREMOTEIO;
- goto err;
- } else
- return 0;
- }
- }
-
- return 0;
-
-td_error:
- ret = uhci_map_status(status, uhci_packetout(td->info));
- if (ret == -EPIPE)
- /* endpoint has stalled - mark it halted */
- usb_endpoint_halt(urb->dev, uhci_endpoint(td->info),
- uhci_packetout(td->info));
-
-err:
- if ((debug == 1 && ret != -EPIPE) || debug > 1) {
- /* Some debugging code */
- dbg("uhci_result_interrupt/bulk() failed with status %x",
- status);
-
- if (errbuf) {
- /* Print the chain for debugging purposes */
- if (urbp->qh)
- uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
- else
- uhci_show_td(td, errbuf, ERRBUF_LEN, 0);
-
- lprintk(errbuf);
- }
- }
-
- return ret;
-}
-
-static void uhci_reset_interrupt(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct uhci_td *td;
- unsigned long flags;
-
- spin_lock_irqsave(&urb->lock, flags);
-
- /* Root hub is special */
- if (urb->dev == uhci->rh.dev)
- goto out;
-
- td = list_entry(urbp->td_list.next, struct uhci_td, list);
-
- td->status = (td->status & 0x2F000000) | TD_CTRL_ACTIVE | TD_CTRL_IOC;
- td->info &= ~TD_TOKEN_TOGGLE;
- td->info |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT);
- usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
-
-out:
- urb->status = -EINPROGRESS;
-
- spin_unlock_irqrestore(&urb->lock, flags);
-}
-
-/*
- * Bulk transfers
- */
-static int uhci_submit_bulk(struct urb *urb, struct urb *eurb)
-{
- struct uhci_td *td;
- struct uhci_qh *qh;
- unsigned long destination, status;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
- int len = urb->transfer_buffer_length;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- dma_addr_t data = urbp->transfer_buffer_dma_handle;
-
- if (len < 0)
- return -EINVAL;
-
- /* Can't have low speed bulk transfers */
- if (urb->pipe & TD_CTRL_LS)
- return -EINVAL;
-
- /* The "pipe" thing contains the destination in bits 8--18 */
- destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
-
- /* 3 errors */
- status = TD_CTRL_ACTIVE | (3 << TD_CTRL_C_ERR_SHIFT);
-
- if (!(urb->transfer_flags & USB_DISABLE_SPD))
- status |= TD_CTRL_SPD;
-
- /*
- * Build the DATA TD's
- */
- do { /* Allow zero length packets */
- int pktsze = len;
-
- if (pktsze > maxsze)
- pktsze = maxsze;
-
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination |
- (((pktsze - 1) & UHCI_NULL_DATA_SIZE) << 21) |
- (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
- data);
-
- data += pktsze;
- len -= maxsze;
-
- usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe));
- } while (len > 0);
-
- /*
- * USB_ZERO_PACKET means adding a 0-length packet, if
- * direction is OUT and the transfer_length was an
- * exact multiple of maxsze, hence
- * (len = transfer_length - N * maxsze) == 0
- * however, if transfer_length == 0, the zero packet
- * was already prepared above.
- */
- if (usb_pipeout(urb->pipe) && (urb->transfer_flags & USB_ZERO_PACKET) &&
- !len && urb->transfer_buffer_length) {
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination |
- (UHCI_NULL_DATA_SIZE << 21) |
- (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
- data);
-
- usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe));
- }
-
- /* Set the flag on the last packet */
- td->status |= TD_CTRL_IOC;
-
- qh = uhci_alloc_qh(uhci, urb->dev);
- if (!qh)
- return -ENOMEM;
-
- urbp->qh = qh;
- qh->urbp = urbp;
-
- /* Always assume breadth first */
- uhci_insert_tds_in_qh(qh, urb, 1);
-
- if (urb->transfer_flags & USB_QUEUE_BULK && eurb)
- uhci_append_queued_urb(uhci, eurb, urb);
- else
- uhci_insert_qh(uhci, uhci->skel_bulk_qh, urb);
-
- uhci_inc_fsbr(uhci, urb);
-
- return -EINPROGRESS;
-}
-
-/* We can use the result interrupt since they're identical */
-#define uhci_result_bulk uhci_result_interrupt
-
-/*
- * Isochronous transfers
- */
-static int isochronous_find_limits(struct urb *urb, unsigned int *start, unsigned int *end)
-{
- struct urb *last_urb = NULL;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct list_head *tmp, *head;
- int ret = 0;
-
- head = &uhci->urb_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *u = list_entry(tmp, struct urb, urb_list);
-
- tmp = tmp->next;
-
- /* look for pending URB's with identical pipe handle */
- if ((urb->pipe == u->pipe) && (urb->dev == u->dev) &&
- (u->status == -EINPROGRESS) && (u != urb)) {
- if (!last_urb)
- *start = u->start_frame;
- last_urb = u;
- }
- }
-
- if (last_urb) {
- *end = (last_urb->start_frame + last_urb->number_of_packets) & 1023;
- ret = 0;
- } else
- ret = -1; /* no previous urb found */
-
- return ret;
-}
-
-static int isochronous_find_start(struct urb *urb)
-{
- int limits;
- unsigned int start = 0, end = 0;
-
- if (urb->number_of_packets > 900) /* 900? Why? */
- return -EFBIG;
-
- limits = isochronous_find_limits(urb, &start, &end);
-
- if (urb->transfer_flags & USB_ISO_ASAP) {
- if (limits) {
- int curframe;
-
- curframe = uhci_get_current_frame_number(urb->dev) % UHCI_NUMFRAMES;
- urb->start_frame = (curframe + 10) % UHCI_NUMFRAMES;
- } else
- urb->start_frame = end;
- } else {
- urb->start_frame %= UHCI_NUMFRAMES;
- /* FIXME: Sanity check */
- }
-
- return 0;
-}
-
-/*
- * Isochronous transfers
- */
-static int uhci_submit_isochronous(struct urb *urb)
-{
- struct uhci_td *td;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- int i, ret, framenum;
- int status, destination;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- status = TD_CTRL_ACTIVE | TD_CTRL_IOS;
- destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
-
- ret = isochronous_find_start(urb);
- if (ret)
- return ret;
-
- framenum = urb->start_frame;
- for (i = 0; i < urb->number_of_packets; i++, framenum++) {
- if (!urb->iso_frame_desc[i].length)
- continue;
-
- td = uhci_alloc_td(uhci, urb->dev);
- if (!td)
- return -ENOMEM;
-
- uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | ((urb->iso_frame_desc[i].length - 1) << 21),
- urbp->transfer_buffer_dma_handle + urb->iso_frame_desc[i].offset);
-
- if (i + 1 >= urb->number_of_packets)
- td->status |= TD_CTRL_IOC;
-
- uhci_insert_td_frame_list(uhci, td, framenum);
- }
-
- return -EINPROGRESS;
-}
-
-static int uhci_result_isochronous(struct urb *urb)
-{
- struct list_head *tmp, *head;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- int status;
- int i, ret = 0;
-
- urb->actual_length = 0;
-
- i = 0;
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
- int actlength;
-
- tmp = tmp->next;
-
- if (td->status & TD_CTRL_ACTIVE)
- return -EINPROGRESS;
-
- actlength = uhci_actual_length(td->status);
- urb->iso_frame_desc[i].actual_length = actlength;
- urb->actual_length += actlength;
-
- status = uhci_map_status(uhci_status_bits(td->status), usb_pipeout(urb->pipe));
- urb->iso_frame_desc[i].status = status;
- if (status) {
- urb->error_count++;
- ret = status;
- }
-
- i++;
- }
-
- return ret;
-}
-
-/*
- * MUST be called with uhci->urb_list_lock acquired
- */
-static struct urb *uhci_find_urb_ep(struct uhci *uhci, struct urb *urb)
-{
- struct list_head *tmp, *head;
-
- /* We don't match Isoc transfers since they are special */
- if (usb_pipeisoc(urb->pipe))
- return NULL;
-
- head = &uhci->urb_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *u = list_entry(tmp, struct urb, urb_list);
-
- tmp = tmp->next;
-
- if (u->dev == urb->dev && u->pipe == urb->pipe &&
- u->status == -EINPROGRESS)
- return u;
- }
-
- return NULL;
-}
-
-static int uhci_submit_urb(struct urb *urb)
-{
- int ret = -EINVAL;
- struct uhci *uhci;
- unsigned long flags;
- struct urb *eurb;
- int bustime;
-
- if (!urb)
- return -EINVAL;
-
- if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv) {
- warn("uhci_submit_urb: urb %p belongs to disconnected device or bus?", urb);
- return -ENODEV;
- }
-
- uhci = (struct uhci *)urb->dev->bus->hcpriv;
-
- INIT_LIST_HEAD(&urb->urb_list);
- usb_inc_dev_use(urb->dev);
-
- spin_lock_irqsave(&uhci->urb_list_lock, flags);
- spin_lock(&urb->lock);
-
- if (urb->status == -EINPROGRESS || urb->status == -ECONNRESET ||
- urb->status == -ECONNABORTED) {
- dbg("uhci_submit_urb: urb not available to submit (status = %d)", urb->status);
- /* Since we can have problems on the out path */
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
- usb_dec_dev_use(urb->dev);
-
- return ret;
- }
-
- if (!uhci_alloc_urb_priv(uhci, urb)) {
- ret = -ENOMEM;
-
- goto out;
- }
-
- eurb = uhci_find_urb_ep(uhci, urb);
- if (eurb && !(urb->transfer_flags & USB_QUEUE_BULK)) {
- ret = -ENXIO;
-
- goto out;
- }
-
- /* Short circuit the virtual root hub */
- if (urb->dev == uhci->rh.dev) {
- ret = rh_submit_urb(urb);
-
- goto out;
- }
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- ret = uhci_submit_control(urb);
- break;
- case PIPE_INTERRUPT:
- if (urb->bandwidth == 0) { /* not yet checked/allocated */
- bustime = usb_check_bandwidth(urb->dev, urb);
- if (bustime < 0)
- ret = bustime;
- else {
- ret = uhci_submit_interrupt(urb);
- if (ret == -EINPROGRESS)
- usb_claim_bandwidth(urb->dev, urb, bustime, 0);
- }
- } else /* bandwidth is already set */
- ret = uhci_submit_interrupt(urb);
- break;
- case PIPE_BULK:
- ret = uhci_submit_bulk(urb, eurb);
- break;
- case PIPE_ISOCHRONOUS:
- if (urb->bandwidth == 0) { /* not yet checked/allocated */
- if (urb->number_of_packets <= 0) {
- ret = -EINVAL;
- break;
- }
- bustime = usb_check_bandwidth(urb->dev, urb);
- if (bustime < 0) {
- ret = bustime;
- break;
- }
-
- ret = uhci_submit_isochronous(urb);
- if (ret == -EINPROGRESS)
- usb_claim_bandwidth(urb->dev, urb, bustime, 1);
- } else /* bandwidth is already set */
- ret = uhci_submit_isochronous(urb);
- break;
- }
-
-out:
- urb->status = ret;
-
- if (ret == -EINPROGRESS) {
- /* We use _tail to make find_urb_ep more efficient */
- list_add_tail(&urb->urb_list, &uhci->urb_list);
-
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- return 0;
- }
-
- uhci_unlink_generic(uhci, urb);
-
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- /* Only call completion if it was successful */
- if (!ret)
- uhci_call_completion(urb);
-
- return ret;
-}
-
-/*
- * Return the result of a transfer
- *
- * MUST be called with urb_list_lock acquired
- */
-static void uhci_transfer_result(struct uhci *uhci, struct urb *urb)
-{
- int ret = -EINVAL;
- unsigned long flags;
- struct urb_priv *urbp;
-
- /* The root hub is special */
- if (urb->dev == uhci->rh.dev)
- return;
-
- spin_lock_irqsave(&urb->lock, flags);
-
- urbp = (struct urb_priv *)urb->hcpriv;
-
- if (urb->status != -EINPROGRESS) {
- info("uhci_transfer_result: called for URB %p not in flight?", urb);
- goto out;
- }
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- ret = uhci_result_control(urb);
- break;
- case PIPE_INTERRUPT:
- ret = uhci_result_interrupt(urb);
- break;
- case PIPE_BULK:
- ret = uhci_result_bulk(urb);
- break;
- case PIPE_ISOCHRONOUS:
- ret = uhci_result_isochronous(urb);
- break;
- }
-
- urbp->status = ret;
-
- if (ret == -EINPROGRESS)
- goto out;
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- case PIPE_BULK:
- case PIPE_ISOCHRONOUS:
- /* Release bandwidth for Interrupt or Isoc. transfers */
- /* Spinlock needed ? */
- if (urb->bandwidth)
- usb_release_bandwidth(urb->dev, urb, 1);
- uhci_unlink_generic(uhci, urb);
- break;
- case PIPE_INTERRUPT:
- /* Interrupts are an exception */
- if (urb->interval)
- goto out_complete;
-
- /* Release bandwidth for Interrupt or Isoc. transfers */
- /* Spinlock needed ? */
- if (urb->bandwidth)
- usb_release_bandwidth(urb->dev, urb, 0);
- uhci_unlink_generic(uhci, urb);
- break;
- default:
- info("uhci_transfer_result: unknown pipe type %d for urb %p\n",
- usb_pipetype(urb->pipe), urb);
- }
-
- /* Remove it from uhci->urb_list */
- list_del_init(&urb->urb_list);
-
-out_complete:
- uhci_add_complete(urb);
-
-out:
- spin_unlock_irqrestore(&urb->lock, flags);
-}
-
-/*
- * MUST be called with urb->lock acquired
- */
-static void uhci_unlink_generic(struct uhci *uhci, struct urb *urb)
-{
- struct list_head *head, *tmp;
- struct urb_priv *urbp = urb->hcpriv;
- int prevactive = 1;
-
- /* We can get called when urbp allocation fails, so check */
- if (!urbp)
- return;
-
- uhci_dec_fsbr(uhci, urb); /* Safe since it checks */
-
- /*
- * Now we need to find out what the last successful toggle was
- * so we can update the local data toggle for the next transfer
- *
- * There's 3 way's the last successful completed TD is found:
- *
- * 1) The TD is NOT active and the actual length < expected length
- * 2) The TD is NOT active and it's the last TD in the chain
- * 3) The TD is active and the previous TD is NOT active
- *
- * Control and Isochronous ignore the toggle, so this is safe
- * for all types
- */
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- if (!(td->status & TD_CTRL_ACTIVE) &&
- (uhci_actual_length(td->status) < uhci_expected_length(td->info) ||
- tmp == head))
- usb_settoggle(urb->dev, uhci_endpoint(td->info),
- uhci_packetout(td->info),
- uhci_toggle(td->info) ^ 1);
- else if ((td->status & TD_CTRL_ACTIVE) && !prevactive)
- usb_settoggle(urb->dev, uhci_endpoint(td->info),
- uhci_packetout(td->info),
- uhci_toggle(td->info));
-
- prevactive = td->status & TD_CTRL_ACTIVE;
- }
-
- uhci_delete_queued_urb(uhci, urb);
-
- /* The interrupt loop will reclaim the QH's */
- uhci_remove_qh(uhci, urbp->qh);
- urbp->qh = NULL;
-}
-
-static int uhci_unlink_urb(struct urb *urb)
-{
- struct uhci *uhci;
- unsigned long flags;
- struct urb_priv *urbp = urb->hcpriv;
-
- if (!urb)
- return -EINVAL;
-
- if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv)
- return -ENODEV;
-
- uhci = (struct uhci *)urb->dev->bus->hcpriv;
-
- spin_lock_irqsave(&uhci->urb_list_lock, flags);
- spin_lock(&urb->lock);
-
- /* Release bandwidth for Interrupt or Isoc. transfers */
- /* Spinlock needed ? */
- if (urb->bandwidth) {
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_INTERRUPT:
- usb_release_bandwidth(urb->dev, urb, 0);
- break;
- case PIPE_ISOCHRONOUS:
- usb_release_bandwidth(urb->dev, urb, 1);
- break;
- default:
- break;
- }
- }
-
- if (urb->status != -EINPROGRESS) {
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
- return 0;
- }
-
- list_del_init(&urb->urb_list);
-
- uhci_unlink_generic(uhci, urb);
-
- /* Short circuit the virtual root hub */
- if (urb->dev == uhci->rh.dev) {
- rh_unlink_urb(urb);
-
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- uhci_call_completion(urb);
- } else {
- if (urb->transfer_flags & USB_ASYNC_UNLINK) {
- urbp->status = urb->status = -ECONNABORTED;
-
- spin_lock(&uhci->urb_remove_list_lock);
-
- /* If we're the first, set the next interrupt bit */
- if (list_empty(&uhci->urb_remove_list))
- uhci_set_next_interrupt(uhci);
-
- list_add(&urb->urb_list, &uhci->urb_remove_list);
-
- spin_unlock(&uhci->urb_remove_list_lock);
-
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- } else {
- urb->status = -ENOENT;
-
- spin_unlock(&urb->lock);
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- if (in_interrupt()) { /* wait at least 1 frame */
- static int errorcount = 10;
-
- if (errorcount--)
- dbg("uhci_unlink_urb called from interrupt for urb %p", urb);
- udelay(1000);
- } else
- schedule_timeout(1+1*HZ/1000);
-
- uhci_call_completion(urb);
- }
- }
-
- return 0;
-}
-
-static int uhci_fsbr_timeout(struct uhci *uhci, struct urb *urb)
-{
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- struct list_head *head, *tmp;
- int count = 0;
-
- uhci_dec_fsbr(uhci, urb);
-
- urbp->fsbr_timeout = 1;
-
- /*
- * Ideally we would want to fix qh->element as well, but it's
- * read/write by the HC, so that can introduce a race. It's not
- * really worth the hassle
- */
-
- head = &urbp->td_list;
- tmp = head->next;
- while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- /*
- * Make sure we don't do the last one (since it'll have the
- * TERM bit set) as well as we skip every so many TD's to
- * make sure it doesn't hog the bandwidth
- */
- if (tmp != head && (count % DEPTH_INTERVAL) == (DEPTH_INTERVAL - 1))
- td->link |= UHCI_PTR_DEPTH;
-
- count++;
- }
-
- return 0;
-}
-
-/*
- * uhci_get_current_frame_number()
- *
- * returns the current frame number for a USB bus/controller.
- */
-static int uhci_get_current_frame_number(struct usb_device *dev)
-{
- struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
-
- return inw(uhci->io_addr + USBFRNUM);
-}
-
-struct usb_operations uhci_device_operations = {
- uhci_alloc_dev,
- uhci_free_dev,
- uhci_get_current_frame_number,
- uhci_submit_urb,
- uhci_unlink_urb
-};
-
-/* Virtual Root Hub */
-
-static __u8 root_hub_dev_des[] =
-{
- 0x12, /* __u8 bLength; */
- 0x01, /* __u8 bDescriptorType; Device */
- 0x00, /* __u16 bcdUSB; v1.0 */
- 0x01,
- 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
- 0x00, /* __u8 bDeviceSubClass; */
- 0x00, /* __u8 bDeviceProtocol; */
- 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
- 0x00, /* __u16 idVendor; */
- 0x00,
- 0x00, /* __u16 idProduct; */
- 0x00,
- 0x00, /* __u16 bcdDevice; */
- 0x00,
- 0x00, /* __u8 iManufacturer; */
- 0x02, /* __u8 iProduct; */
- 0x01, /* __u8 iSerialNumber; */
- 0x01 /* __u8 bNumConfigurations; */
-};
-
-
-/* Configuration descriptor */
-static __u8 root_hub_config_des[] =
-{
- 0x09, /* __u8 bLength; */
- 0x02, /* __u8 bDescriptorType; Configuration */
- 0x19, /* __u16 wTotalLength; */
- 0x00,
- 0x01, /* __u8 bNumInterfaces; */
- 0x01, /* __u8 bConfigurationValue; */
- 0x00, /* __u8 iConfiguration; */
- 0x40, /* __u8 bmAttributes;
- Bit 7: Bus-powered, 6: Self-powered,
- Bit 5 Remote-wakeup, 4..0: resvd */
- 0x00, /* __u8 MaxPower; */
-
- /* interface */
- 0x09, /* __u8 if_bLength; */
- 0x04, /* __u8 if_bDescriptorType; Interface */
- 0x00, /* __u8 if_bInterfaceNumber; */
- 0x00, /* __u8 if_bAlternateSetting; */
- 0x01, /* __u8 if_bNumEndpoints; */
- 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
- 0x00, /* __u8 if_bInterfaceSubClass; */
- 0x00, /* __u8 if_bInterfaceProtocol; */
- 0x00, /* __u8 if_iInterface; */
-
- /* endpoint */
- 0x07, /* __u8 ep_bLength; */
- 0x05, /* __u8 ep_bDescriptorType; Endpoint */
- 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
- 0x03, /* __u8 ep_bmAttributes; Interrupt */
- 0x08, /* __u16 ep_wMaxPacketSize; 8 Bytes */
- 0x00,
- 0xff /* __u8 ep_bInterval; 255 ms */
-};
-
-static __u8 root_hub_hub_des[] =
-{
- 0x09, /* __u8 bLength; */
- 0x29, /* __u8 bDescriptorType; Hub-descriptor */
- 0x02, /* __u8 bNbrPorts; */
- 0x00, /* __u16 wHubCharacteristics; */
- 0x00,
- 0x01, /* __u8 bPwrOn2pwrGood; 2ms */
- 0x00, /* __u8 bHubContrCurrent; 0 mA */
- 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */
- 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */
-};
-
-/* prepare Interrupt pipe transaction data; HUB INTERRUPT ENDPOINT */
-static int rh_send_irq(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- unsigned int io_addr = uhci->io_addr;
- unsigned long flags;
- int i, len = 1;
- __u16 data = 0;
-
- spin_lock_irqsave(&urb->lock, flags);
- for (i = 0; i < uhci->rh.numports; i++) {
- data |= ((inw(io_addr + USBPORTSC1 + i * 2) & 0xa) > 0 ? (1 << (i + 1)) : 0);
- len = (i + 1) / 8 + 1;
- }
-
- *(__u16 *) urb->transfer_buffer = cpu_to_le16(data);
- urb->actual_length = len;
- urbp->status = 0;
-
- spin_unlock_irqrestore(&urb->lock, flags);
-
- if ((data > 0) && (uhci->rh.send != 0)) {
- dbg("root-hub INT complete: port1: %x port2: %x data: %x",
- inw(io_addr + USBPORTSC1), inw(io_addr + USBPORTSC2), data);
- uhci_call_completion(urb);
- }
-
- return 0;
-}
-
-/* Virtual Root Hub INTs are polled by this timer every "interval" ms */
-static int rh_init_int_timer(struct urb *urb);
-
-static void rh_int_timer_do(unsigned long ptr)
-{
- struct urb *urb = (struct urb *)ptr;
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- struct list_head list, *tmp, *head;
- unsigned long flags;
-
- if (uhci->rh.send)
- rh_send_irq(urb);
-
- INIT_LIST_HEAD(&list);
-
- spin_lock_irqsave(&uhci->urb_list_lock, flags);
- head = &uhci->urb_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *u = list_entry(tmp, struct urb, urb_list);
- struct urb_priv *up = (struct urb_priv *)u->hcpriv;
-
- tmp = tmp->next;
-
- spin_lock(&u->lock);
-
- /* Check if the FSBR timed out */
- if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
- uhci_fsbr_timeout(uhci, u);
-
- /* Check if the URB timed out */
- if (u->timeout && time_after_eq(jiffies, up->inserttime + u->timeout)) {
- list_del(&u->urb_list);
- list_add_tail(&u->urb_list, &list);
- }
-
- spin_unlock(&u->lock);
- }
- spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
-
- head = &list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *u = list_entry(tmp, struct urb, urb_list);
-
- tmp = tmp->next;
-
- u->transfer_flags |= USB_ASYNC_UNLINK | USB_TIMEOUT_KILLED;
- uhci_unlink_urb(u);
- }
-
- /* Really disable FSBR */
- if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
- uhci->fsbrtimeout = 0;
- uhci->skel_term_qh->link = UHCI_PTR_TERM;
- }
-
- /* enter global suspend if nothing connected */
- if (!uhci->is_suspended && !ports_active(uhci))
- suspend_hc(uhci);
-
- rh_init_int_timer(urb);
-}
-
-/* Root Hub INTs are polled by this timer */
-static int rh_init_int_timer(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
-
- uhci->rh.interval = urb->interval;
- init_timer(&uhci->rh.rh_int_timer);
- uhci->rh.rh_int_timer.function = rh_int_timer_do;
- uhci->rh.rh_int_timer.data = (unsigned long)urb;
- uhci->rh.rh_int_timer.expires = jiffies + (HZ * (urb->interval < 30 ? 30 : urb->interval)) / 1000;
- add_timer(&uhci->rh.rh_int_timer);
-
- return 0;
-}
-
-#define OK(x) len = (x); break
-
-#define CLR_RH_PORTSTAT(x) \
- status = inw(io_addr + USBPORTSC1 + 2 * (wIndex-1)); \
- status = (status & 0xfff5) & ~(x); \
- outw(status, io_addr + USBPORTSC1 + 2 * (wIndex-1))
-
-#define SET_RH_PORTSTAT(x) \
- status = inw(io_addr + USBPORTSC1 + 2 * (wIndex-1)); \
- status = (status & 0xfff5) | (x); \
- outw(status, io_addr + USBPORTSC1 + 2 * (wIndex-1))
-
-
-/* Root Hub Control Pipe */
-static int rh_submit_urb(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- unsigned int pipe = urb->pipe;
- struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *)urb->setup_packet;
- void *data = urb->transfer_buffer;
- int leni = urb->transfer_buffer_length;
- int len = 0;
- int status = 0;
- int stat = 0;
- int i;
- unsigned int io_addr = uhci->io_addr;
- __u16 cstatus;
- __u16 bmRType_bReq;
- __u16 wValue;
- __u16 wIndex;
- __u16 wLength;
-
- if (usb_pipetype(pipe) == PIPE_INTERRUPT) {
- uhci->rh.urb = urb;
- uhci->rh.send = 1;
- uhci->rh.interval = urb->interval;
- rh_init_int_timer(urb);
-
- return -EINPROGRESS;
- }
-
- bmRType_bReq = cmd->bRequestType | cmd->bRequest << 8;
- wValue = le16_to_cpu(cmd->wValue);
- wIndex = le16_to_cpu(cmd->wIndex);
- wLength = le16_to_cpu(cmd->wLength);
-
- for (i = 0; i < 8; i++)
- uhci->rh.c_p_r[i] = 0;
-
- switch (bmRType_bReq) {
- /* Request Destination:
- without flags: Device,
- RH_INTERFACE: interface,
- RH_ENDPOINT: endpoint,
- RH_CLASS means HUB here,
- RH_OTHER | RH_CLASS almost ever means HUB_PORT here
- */
-
- case RH_GET_STATUS:
- *(__u16 *)data = cpu_to_le16(1);
- OK(2);
- case RH_GET_STATUS | RH_INTERFACE:
- *(__u16 *)data = cpu_to_le16(0);
- OK(2);
- case RH_GET_STATUS | RH_ENDPOINT:
- *(__u16 *)data = cpu_to_le16(0);
- OK(2);
- case RH_GET_STATUS | RH_CLASS:
- *(__u32 *)data = cpu_to_le32(0);
- OK(4); /* hub power */
- case RH_GET_STATUS | RH_OTHER | RH_CLASS:
- status = inw(io_addr + USBPORTSC1 + 2 * (wIndex - 1));
- cstatus = ((status & USBPORTSC_CSC) >> (1 - 0)) |
- ((status & USBPORTSC_PEC) >> (3 - 1)) |
- (uhci->rh.c_p_r[wIndex - 1] << (0 + 4));
- status = (status & USBPORTSC_CCS) |
- ((status & USBPORTSC_PE) >> (2 - 1)) |
- ((status & USBPORTSC_SUSP) >> (12 - 2)) |
- ((status & USBPORTSC_PR) >> (9 - 4)) |
- (1 << 8) | /* power on */
- ((status & USBPORTSC_LSDA) << (-8 + 9));
-
- *(__u16 *)data = cpu_to_le16(status);
- *(__u16 *)(data + 2) = cpu_to_le16(cstatus);
- OK(4);
- case RH_CLEAR_FEATURE | RH_ENDPOINT:
- switch (wValue) {
- case RH_ENDPOINT_STALL:
- OK(0);
- }
- break;
- case RH_CLEAR_FEATURE | RH_CLASS:
- switch (wValue) {
- case RH_C_HUB_OVER_CURRENT:
- OK(0); /* hub power over current */
- }
- break;
- case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
- switch (wValue) {
- case RH_PORT_ENABLE:
- CLR_RH_PORTSTAT(USBPORTSC_PE);
- OK(0);
- case RH_PORT_SUSPEND:
- CLR_RH_PORTSTAT(USBPORTSC_SUSP);
- OK(0);
- case RH_PORT_POWER:
- OK(0); /* port power */
- case RH_C_PORT_CONNECTION:
- SET_RH_PORTSTAT(USBPORTSC_CSC);
- OK(0);
- case RH_C_PORT_ENABLE:
- SET_RH_PORTSTAT(USBPORTSC_PEC);
- OK(0);
- case RH_C_PORT_SUSPEND:
- /*** WR_RH_PORTSTAT(RH_PS_PSSC); */
- OK(0);
- case RH_C_PORT_OVER_CURRENT:
- OK(0); /* port power over current */
- case RH_C_PORT_RESET:
- uhci->rh.c_p_r[wIndex - 1] = 0;
- OK(0);
- }
- break;
- case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
- switch (wValue) {
- case RH_PORT_SUSPEND:
- SET_RH_PORTSTAT(USBPORTSC_SUSP);
- OK(0);
- case RH_PORT_RESET:
- SET_RH_PORTSTAT(USBPORTSC_PR);
- mdelay(50); /* USB v1.1 7.1.7.3 */
- uhci->rh.c_p_r[wIndex - 1] = 1;
- CLR_RH_PORTSTAT(USBPORTSC_PR);
- udelay(10);
- SET_RH_PORTSTAT(USBPORTSC_PE);
- mdelay(10);
- SET_RH_PORTSTAT(0xa);
- OK(0);
- case RH_PORT_POWER:
- OK(0); /* port power ** */
- case RH_PORT_ENABLE:
- SET_RH_PORTSTAT(USBPORTSC_PE);
- OK(0);
- }
- break;
- case RH_SET_ADDRESS:
- uhci->rh.devnum = wValue;
- OK(0);
- case RH_GET_DESCRIPTOR:
- switch ((wValue & 0xff00) >> 8) {
- case 0x01: /* device descriptor */
- len = min_t(unsigned int, leni,
- min_t(unsigned int,
- sizeof(root_hub_dev_des), wLength));
- memcpy(data, root_hub_dev_des, len);
- OK(len);
- case 0x02: /* configuration descriptor */
- len = min_t(unsigned int, leni,
- min_t(unsigned int,
- sizeof(root_hub_config_des), wLength));
- memcpy (data, root_hub_config_des, len);
- OK(len);
- case 0x03: /* string descriptors */
- len = usb_root_hub_string (wValue & 0xff,
- uhci->io_addr, "UHCI-alt",
- data, wLength);
- if (len > 0) {
- OK(min_t(int, leni, len));
- } else
- stat = -EPIPE;
- }
- break;
- case RH_GET_DESCRIPTOR | RH_CLASS:
- root_hub_hub_des[2] = uhci->rh.numports;
- len = min_t(unsigned int, leni,
- min_t(unsigned int, sizeof(root_hub_hub_des), wLength));
- memcpy(data, root_hub_hub_des, len);
- OK(len);
- case RH_GET_CONFIGURATION:
- *(__u8 *)data = 0x01;
- OK(1);
- case RH_SET_CONFIGURATION:
- OK(0);
- case RH_GET_INTERFACE | RH_INTERFACE:
- *(__u8 *)data = 0x00;
- OK(1);
- case RH_SET_INTERFACE | RH_INTERFACE:
- OK(0);
- default:
- stat = -EPIPE;
- }
-
- urb->actual_length = len;
-
- return stat;
-}
-
-/*
- * MUST be called with urb->lock acquired
- */
-static int rh_unlink_urb(struct urb *urb)
-{
- struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
-
- if (uhci->rh.urb == urb) {
- urb->status = -ENOENT;
- uhci->rh.send = 0;
- uhci->rh.urb = NULL;
- del_timer(&uhci->rh.rh_int_timer);
- }
- return 0;
-}
-
-static void uhci_free_pending_qhs(struct uhci *uhci)
-{
- struct list_head *tmp, *head;
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
- head = &uhci->qh_remove_list;
- tmp = head->next;
- while (tmp != head) {
- struct uhci_qh *qh = list_entry(tmp, struct uhci_qh, remove_list);
-
- tmp = tmp->next;
-
- list_del_init(&qh->remove_list);
-
- uhci_free_qh(uhci, qh);
- }
- spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
-}
-
-static void uhci_call_completion(struct urb *urb)
-{
- struct urb_priv *urbp;
- struct usb_device *dev = urb->dev;
- struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
- int is_ring = 0, killed, resubmit_interrupt, status;
- struct urb *nurb;
- unsigned long flags;
-
- spin_lock_irqsave(&urb->lock, flags);
-
- urbp = (struct urb_priv *)urb->hcpriv;
- if (!urbp || !urb->dev) {
- spin_unlock_irqrestore(&urb->lock, flags);
- return;
- }
-
- killed = (urb->status == -ENOENT || urb->status == -ECONNABORTED ||
- urb->status == -ECONNRESET);
- resubmit_interrupt = (usb_pipetype(urb->pipe) == PIPE_INTERRUPT &&
- urb->interval);
-
- nurb = urb->next;
- if (nurb && !killed) {
- int count = 0;
-
- while (nurb && nurb != urb && count < MAX_URB_LOOP) {
- if (nurb->status == -ENOENT ||
- nurb->status == -ECONNABORTED ||
- nurb->status == -ECONNRESET) {
- killed = 1;
- break;
- }
-
- nurb = nurb->next;
- count++;
- }
-
- if (count == MAX_URB_LOOP)
- err("uhci_call_completion: too many linked URB's, loop? (first loop)");
-
- /* Check to see if chain is a ring */
- is_ring = (nurb == urb);
- }
-
- if (urbp->transfer_buffer_dma_handle)
- pci_dma_sync_single(uhci->dev, urbp->transfer_buffer_dma_handle,
- urb->transfer_buffer_length, usb_pipein(urb->pipe) ?
- PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
-
- if (urbp->setup_packet_dma_handle)
- pci_dma_sync_single(uhci->dev, urbp->setup_packet_dma_handle,
- sizeof(struct usb_ctrlrequest), PCI_DMA_TODEVICE);
-
- status = urbp->status;
- if (!resubmit_interrupt || killed)
- /* We don't need urb_priv anymore */
- uhci_destroy_urb_priv(urb);
-
- if (!killed)
- urb->status = status;
-
- urb->dev = NULL;
- spin_unlock_irqrestore(&urb->lock, flags);
-
- if (urb->complete)
- urb->complete(urb);
-
- if (resubmit_interrupt)
- /* Recheck the status. The completion handler may have */
- /* unlinked the resubmitting interrupt URB */
- killed = (urb->status == -ENOENT ||
- urb->status == -ECONNABORTED ||
- urb->status == -ECONNRESET);
-
- if (resubmit_interrupt && !killed) {
- urb->dev = dev;
- uhci_reset_interrupt(urb);
- } else {
- if (is_ring && !killed) {
- urb->dev = dev;
- uhci_submit_urb(urb);
- } else {
- /* We decrement the usage count after we're done */
- /* with everything */
- usb_dec_dev_use(dev);
- }
- }
-}
-
-static void uhci_finish_completion(struct uhci *uhci)
-{
- struct list_head *tmp, *head;
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->complete_list_lock, flags);
- head = &uhci->complete_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb_priv *urbp = list_entry(tmp, struct urb_priv, complete_list);
- struct urb *urb = urbp->urb;
-
- list_del_init(&urbp->complete_list);
- spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
-
- uhci_call_completion(urb);
-
- spin_lock_irqsave(&uhci->complete_list_lock, flags);
- head = &uhci->complete_list;
- tmp = head->next;
- }
- spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
-}
-
-static void uhci_remove_pending_qhs(struct uhci *uhci)
-{
- struct list_head *tmp, *head;
- unsigned long flags;
-
- spin_lock_irqsave(&uhci->urb_remove_list_lock, flags);
- head = &uhci->urb_remove_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *urb = list_entry(tmp, struct urb, urb_list);
- struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
-
- tmp = tmp->next;
-
- list_del_init(&urb->urb_list);
-
- urbp->status = urb->status = -ECONNRESET;
-
- uhci_add_complete(urb);
- }
- spin_unlock_irqrestore(&uhci->urb_remove_list_lock, flags);
-}
-
-static void uhci_interrupt(int irq, void *__uhci, struct pt_regs *regs)
-{
- struct uhci *uhci = __uhci;
- unsigned int io_addr = uhci->io_addr;
- unsigned short status;
- struct list_head *tmp, *head;
-
- /*
- * Read the interrupt status, and write it back to clear the
- * interrupt cause
- */
- status = inw(io_addr + USBSTS);
- if (!status) /* shared interrupt, not mine */
- return;
- outw(status, io_addr + USBSTS); /* Clear it */
-
- if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
- if (status & USBSTS_HSE)
- err("%x: host system error, PCI problems?", io_addr);
- if (status & USBSTS_HCPE)
- err("%x: host controller process error. something bad happened", io_addr);
- if ((status & USBSTS_HCH) && !uhci->is_suspended) {
- err("%x: host controller halted. very bad", io_addr);
- /* FIXME: Reset the controller, fix the offending TD */
- }
- }
-
- if (status & USBSTS_RD)
- wakeup_hc(uhci);
-
- uhci_free_pending_qhs(uhci);
-
- uhci_remove_pending_qhs(uhci);
-
- uhci_clear_next_interrupt(uhci);
-
- /* Walk the list of pending URB's to see which ones completed */
- spin_lock(&uhci->urb_list_lock);
- head = &uhci->urb_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb *urb = list_entry(tmp, struct urb, urb_list);
-
- tmp = tmp->next;
-
- /* Checks the status and does all of the magic necessary */
- uhci_transfer_result(uhci, urb);
- }
- spin_unlock(&uhci->urb_list_lock);
-
- uhci_finish_completion(uhci);
-}
-
-static void reset_hc(struct uhci *uhci)
-{
- unsigned int io_addr = uhci->io_addr;
-
- /* Global reset for 50ms */
- outw(USBCMD_GRESET, io_addr + USBCMD);
- wait_ms(50);
- outw(0, io_addr + USBCMD);
- wait_ms(10);
-}
-
-static void suspend_hc(struct uhci *uhci)
-{
- unsigned int io_addr = uhci->io_addr;
-
- dbg("%x: suspend_hc", io_addr);
-
- outw(USBCMD_EGSM, io_addr + USBCMD);
-
- uhci->is_suspended = 1;
-}
-
-static void wakeup_hc(struct uhci *uhci)
-{
- unsigned int io_addr = uhci->io_addr;
- unsigned int status;
-
- dbg("%x: wakeup_hc", io_addr);
-
- outw(0, io_addr + USBCMD);
-
- /* wait for EOP to be sent */
- status = inw(io_addr + USBCMD);
- while (status & USBCMD_FGR)
- status = inw(io_addr + USBCMD);
-
- uhci->is_suspended = 0;
-
- /* Run and mark it configured with a 64-byte max packet */
- outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
-}
-
-static int ports_active(struct uhci *uhci)
-{
- unsigned int io_addr = uhci->io_addr;
- int connection = 0;
- int i;
-
- for (i = 0; i < uhci->rh.numports; i++)
- connection |= (inw(io_addr + USBPORTSC1 + i * 2) & 0x1);
-
- return connection;
-}
-
-static void start_hc(struct uhci *uhci)
-{
- unsigned int io_addr = uhci->io_addr;
- int timeout = 1000;
-
- /*
- * Reset the HC - this will force us to get a
- * new notification of any already connected
- * ports due to the virtual disconnect that it
- * implies.
- */
- outw(USBCMD_HCRESET, io_addr + USBCMD);
- while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
- if (!--timeout) {
- printk(KERN_ERR "uhci: USBCMD_HCRESET timed out!\n");
- break;
- }
- }
-
- /* Turn on all interrupts */
- outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
- io_addr + USBINTR);
-
- /* Start at frame 0 */
- outw(0, io_addr + USBFRNUM);
- outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
-
- /* Run and mark it configured with a 64-byte max packet */
- outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
-}
-
-#ifdef CONFIG_PROC_FS
-static int uhci_num = 0;
-#endif
-
-static void free_uhci(struct uhci *uhci)
-{
- kfree(uhci);
-}
-
-/*
- * De-allocate all resources..
- */
-static void release_uhci(struct uhci *uhci)
-{
- int i;
-#ifdef CONFIG_PROC_FS
- char buf[8];
-#endif
-
- if (uhci->irq >= 0) {
- free_irq(uhci->irq, uhci);
- uhci->irq = -1;
- }
-
- for (i = 0; i < UHCI_NUM_SKELQH; i++)
- if (uhci->skelqh[i]) {
- uhci_free_qh(uhci, uhci->skelqh[i]);
- uhci->skelqh[i] = NULL;
- }
-
- for (i = 0; i < UHCI_NUM_SKELTD; i++)
- if (uhci->skeltd[i]) {
- uhci_free_td(uhci, uhci->skeltd[i]);
- uhci->skeltd[i] = NULL;
- }
-
- if (uhci->qh_pool) {
- pci_pool_destroy(uhci->qh_pool);
- uhci->qh_pool = NULL;
- }
-
- if (uhci->td_pool) {
- pci_pool_destroy(uhci->td_pool);
- uhci->td_pool = NULL;
- }
-
- if (uhci->fl) {
- pci_free_consistent(uhci->dev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
- uhci->fl = NULL;
- }
-
- if (uhci->bus) {
- usb_free_bus(uhci->bus);
- uhci->bus = NULL;
- }
-
-#ifdef CONFIG_PROC_FS
- if (uhci->proc_entry) {
- sprintf(buf, "hc%d", uhci->num);
-
- remove_proc_entry(buf, uhci_proc_root);
- uhci->proc_entry = NULL;
- }
-#endif
-
- free_uhci(uhci);
-}
-
-/*
- * Allocate a frame list, and then setup the skeleton
- *
- * The hardware doesn't really know any difference
- * in the queues, but the order does matter for the
- * protocols higher up. The order is:
- *
- * - any isochronous events handled before any
- * of the queues. We don't do that here, because
- * we'll create the actual TD entries on demand.
- * - The first queue is the interrupt queue.
- * - The second queue is the control queue, split into low and high speed
- * - The third queue is bulk queue.
- * - The fourth queue is the bandwidth reclamation queue, which loops back
- * to the high speed control queue.
- */
-static int alloc_uhci(struct pci_dev *dev, unsigned int io_addr, unsigned int io_size)
-{
- struct uhci *uhci;
- int retval;
- char buf[8], *bufp = buf;
- int i, port;
- struct usb_bus *bus;
- dma_addr_t dma_handle;
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *ent;
-#endif
-
- retval = -ENODEV;
- if (pci_enable_device(dev) < 0) {
- err("couldn't enable PCI device");
- goto err_enable_device;
- }
-
- if (!dev->irq) {
- err("found UHCI device with no IRQ assigned. check BIOS settings!");
- goto err_invalid_irq;
- }
-
- if (!pci_dma_supported(dev, 0xFFFFFFFF)) {
- err("PCI subsystem doesn't support 32 bit addressing?");
- goto err_pci_dma_supported;
- }
-
- retval = -EBUSY;
- if (!request_region(io_addr, io_size, "usb-uhci")) {
- err("couldn't allocate I/O range %x - %x", io_addr,
- io_addr + io_size - 1);
- goto err_request_region;
- }
-
- pci_set_master(dev);
-
-#ifndef __sparc__
- sprintf(buf, "%d", dev->irq);
-#else
- bufp = __irq_itoa(dev->irq);
-#endif
- printk(KERN_INFO __FILE__ ": USB UHCI at I/O 0x%x, IRQ %s\n",
- io_addr, bufp);
-
- if (pci_set_dma_mask(dev, 0xFFFFFFFF)) {
- err("couldn't set PCI dma mask");
- retval = -ENODEV;
- goto err_pci_set_dma_mask;
- }
-
- uhci = kmalloc(sizeof(*uhci), GFP_KERNEL);
- if (!uhci) {
- err("couldn't allocate uhci structure");
- retval = -ENOMEM;
- goto err_alloc_uhci;
- }
-
- uhci->dev = dev;
- uhci->irq = dev->irq;
- uhci->io_addr = io_addr;
- uhci->io_size = io_size;
- pci_set_drvdata(dev, uhci);
-
-#ifdef CONFIG_PROC_FS
- uhci->num = uhci_num++;
-
- sprintf(buf, "hc%d", uhci->num);
-
- ent = create_proc_entry(buf, S_IFREG|S_IRUGO|S_IWUSR, uhci_proc_root);
- if (!ent) {
- err("couldn't create uhci proc entry");
- retval = -ENOMEM;
- goto err_create_proc_entry;
- }
-
- ent->data = uhci;
- ent->proc_fops = &uhci_proc_operations;
- ent->size = 0;
- uhci->proc_entry = ent;
-#endif
-
- /* Reset here so we don't get any interrupts from an old setup */
- /* or broken setup */
- reset_hc(uhci);
-
- uhci->fsbr = 0;
- uhci->fsbrtimeout = 0;
-
- uhci->is_suspended = 0;
-
- spin_lock_init(&uhci->qh_remove_list_lock);
- INIT_LIST_HEAD(&uhci->qh_remove_list);
-
- spin_lock_init(&uhci->urb_remove_list_lock);
- INIT_LIST_HEAD(&uhci->urb_remove_list);
-
- spin_lock_init(&uhci->urb_list_lock);
- INIT_LIST_HEAD(&uhci->urb_list);
-
- spin_lock_init(&uhci->complete_list_lock);
- INIT_LIST_HEAD(&uhci->complete_list);
-
- spin_lock_init(&uhci->frame_list_lock);
-
- /* We need exactly one page (per UHCI specs), how convenient */
- /* We assume that one page is atleast 4k (1024 frames * 4 bytes) */
-#if PAGE_SIZE < (4 * 1024)
-#error PAGE_SIZE is not atleast 4k
-#endif
- uhci->fl = pci_alloc_consistent(uhci->dev, sizeof(*uhci->fl), &dma_handle);
- if (!uhci->fl) {
- err("unable to allocate consistent memory for frame list");
- goto err_alloc_fl;
- }
-
- memset((void *)uhci->fl, 0, sizeof(*uhci->fl));
-
- uhci->fl->dma_handle = dma_handle;
-
- uhci->td_pool = pci_pool_create("uhci_td", uhci->dev,
- sizeof(struct uhci_td), 16, 0, GFP_DMA | GFP_ATOMIC);
- if (!uhci->td_pool) {
- err("unable to create td pci_pool");
- goto err_create_td_pool;
- }
-
- uhci->qh_pool = pci_pool_create("uhci_qh", uhci->dev,
- sizeof(struct uhci_qh), 16, 0, GFP_DMA | GFP_ATOMIC);
- if (!uhci->qh_pool) {
- err("unable to create qh pci_pool");
- goto err_create_qh_pool;
- }
-
- bus = usb_alloc_bus(&uhci_device_operations);
- if (!bus) {
- err("unable to allocate bus");
- goto err_alloc_bus;
- }
-
- uhci->bus = bus;
- bus->bus_name = dev->slot_name;
- bus->hcpriv = uhci;
-
- usb_register_bus(uhci->bus);
-
- /* Initialize the root hub */
-
- /* UHCI specs says devices must have 2 ports, but goes on to say */
- /* they may have more but give no way to determine how many they */
- /* have. However, according to the UHCI spec, Bit 7 is always set */
- /* to 1. So we try to use this to our advantage */
- for (port = 0; port < (uhci->io_size - 0x10) / 2; port++) {
- unsigned int portstatus;
-
- portstatus = inw(uhci->io_addr + 0x10 + (port * 2));
- if (!(portstatus & 0x0080))
- break;
- }
- if (debug)
- info("detected %d ports", port);
-
- /* This is experimental so anything less than 2 or greater than 8 is */
- /* something weird and we'll ignore it */
- if (port < 2 || port > 8) {
- info("port count misdetected? forcing to 2 ports");
- port = 2;
- }
-
- uhci->rh.numports = port;
-
- uhci->bus->root_hub = uhci->rh.dev = usb_alloc_dev(NULL, uhci->bus);
- if (!uhci->rh.dev) {
- err("unable to allocate root hub");
- goto err_alloc_root_hub;
- }
-
- uhci->skeltd[0] = uhci_alloc_td(uhci, uhci->rh.dev);
- if (!uhci->skeltd[0]) {
- err("unable to allocate TD 0");
- goto err_alloc_skeltd;
- }
-
- /*
- * 9 Interrupt queues; link int2 to int1, int4 to int2, etc
- * then link int1 to control and control to bulk
- */
- for (i = 1; i < 9; i++) {
- struct uhci_td *td;
-
- td = uhci->skeltd[i] = uhci_alloc_td(uhci, uhci->rh.dev);
- if (!td) {
- err("unable to allocate TD %d", i);
- goto err_alloc_skeltd;
- }
-
- uhci_fill_td(td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
- td->link = uhci->skeltd[i - 1]->dma_handle;
- }
-
- uhci->skel_term_td = uhci_alloc_td(uhci, uhci->rh.dev);
- if (!uhci->skel_term_td) {
- err("unable to allocate skel TD term");
- goto err_alloc_skeltd;
- }
-
- for (i = 0; i < UHCI_NUM_SKELQH; i++) {
- uhci->skelqh[i] = uhci_alloc_qh(uhci, uhci->rh.dev);
- if (!uhci->skelqh[i]) {
- err("unable to allocate QH %d", i);
- goto err_alloc_skelqh;
- }
- }
-
- uhci_fill_td(uhci->skel_int1_td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
- uhci->skel_int1_td->link = uhci->skel_ls_control_qh->dma_handle | UHCI_PTR_QH;
-
- uhci->skel_ls_control_qh->link = uhci->skel_hs_control_qh->dma_handle | UHCI_PTR_QH;
- uhci->skel_ls_control_qh->element = UHCI_PTR_TERM;
-
- uhci->skel_hs_control_qh->link = uhci->skel_bulk_qh->dma_handle | UHCI_PTR_QH;
- uhci->skel_hs_control_qh->element = UHCI_PTR_TERM;
-
- uhci->skel_bulk_qh->link = uhci->skel_term_qh->dma_handle | UHCI_PTR_QH;
- uhci->skel_bulk_qh->element = UHCI_PTR_TERM;
-
- /* This dummy TD is to work around a bug in Intel PIIX controllers */
- uhci_fill_td(uhci->skel_term_td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
- uhci->skel_term_td->link = uhci->skel_term_td->dma_handle;
-
- uhci->skel_term_qh->link = UHCI_PTR_TERM;
- uhci->skel_term_qh->element = uhci->skel_term_td->dma_handle;
-
- /*
- * Fill the frame list: make all entries point to
- * the proper interrupt queue.
- *
- * This is probably silly, but it's a simple way to
- * scatter the interrupt queues in a way that gives
- * us a reasonable dynamic range for irq latencies.
- */
- for (i = 0; i < UHCI_NUMFRAMES; i++) {
- int irq = 0;
-
- if (i & 1) {
- irq++;
- if (i & 2) {
- irq++;
- if (i & 4) {
- irq++;
- if (i & 8) {
- irq++;
- if (i & 16) {
- irq++;
- if (i & 32) {
- irq++;
- if (i & 64)
- irq++;
- }
- }
- }
- }
- }
- }
-
- /* Only place we don't use the frame list routines */
- uhci->fl->frame[i] = uhci->skeltd[irq]->dma_handle;
- }
-
- start_hc(uhci);
-
- if (request_irq(dev->irq, uhci_interrupt, SA_SHIRQ, "usb-uhci", uhci))
- goto err_request_irq;
-
- /* disable legacy emulation */
- pci_write_config_word(uhci->dev, USBLEGSUP, USBLEGSUP_DEFAULT);
-
- usb_connect(uhci->rh.dev);
-
- if (usb_new_device(uhci->rh.dev) != 0) {
- err("unable to start root hub");
- retval = -ENOMEM;
- goto err_start_root_hub;
- }
-
- return 0;
-
-/*
- * error exits:
- */
-err_start_root_hub:
- free_irq(uhci->irq, uhci);
- uhci->irq = -1;
-
-err_request_irq:
- for (i = 0; i < UHCI_NUM_SKELQH; i++)
- if (uhci->skelqh[i]) {
- uhci_free_qh(uhci, uhci->skelqh[i]);
- uhci->skelqh[i] = NULL;
- }
-
-err_alloc_skelqh:
- for (i = 0; i < UHCI_NUM_SKELTD; i++)
- if (uhci->skeltd[i]) {
- uhci_free_td(uhci, uhci->skeltd[i]);
- uhci->skeltd[i] = NULL;
- }
-
-err_alloc_skeltd:
- usb_free_dev(uhci->rh.dev);
- uhci->rh.dev = NULL;
-
-err_alloc_root_hub:
- usb_free_bus(uhci->bus);
- uhci->bus = NULL;
-
-err_alloc_bus:
- pci_pool_destroy(uhci->qh_pool);
- uhci->qh_pool = NULL;
-
-err_create_qh_pool:
- pci_pool_destroy(uhci->td_pool);
- uhci->td_pool = NULL;
-
-err_create_td_pool:
- pci_free_consistent(uhci->dev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
- uhci->fl = NULL;
-
-err_alloc_fl:
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(buf, uhci_proc_root);
- uhci->proc_entry = NULL;
-
-err_create_proc_entry:
- free_uhci(uhci);
-#endif
-
-err_alloc_uhci:
-
-err_pci_set_dma_mask:
- release_region(io_addr, io_size);
-
-err_request_region:
-
-err_pci_dma_supported:
-
-err_invalid_irq:
-
-err_enable_device:
-
- return retval;
-}
-
-static int __devinit uhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
-{
- int i;
-
- /* Search for the IO base address.. */
- for (i = 0; i < 6; i++) {
- unsigned int io_addr = pci_resource_start(dev, i);
- unsigned int io_size = pci_resource_len(dev, i);
-
- /* IO address? */
- if (!(pci_resource_flags(dev, i) & IORESOURCE_IO))
- continue;
-
- return alloc_uhci(dev, io_addr, io_size);
- }
-
- return -ENODEV;
-}
-
-static void __devexit uhci_pci_remove(struct pci_dev *dev)
-{
- struct uhci *uhci = pci_get_drvdata(dev);
-
- if (uhci->bus->root_hub)
- usb_disconnect(&uhci->bus->root_hub);
-
- usb_deregister_bus(uhci->bus);
-
- /*
- * At this point, we're guaranteed that no new connects can be made
- * to this bus since there are no more parents
- */
- uhci_free_pending_qhs(uhci);
- uhci_remove_pending_qhs(uhci);
-
- reset_hc(uhci);
- release_region(uhci->io_addr, uhci->io_size);
-
- uhci_free_pending_qhs(uhci);
-
- release_uhci(uhci);
-}
-
-#ifdef CONFIG_PM
-static int uhci_pci_suspend(struct pci_dev *dev, u32 state)
-{
- suspend_hc((struct uhci *) pci_get_drvdata(dev));
- return 0;
-}
-
-static int uhci_pci_resume(struct pci_dev *dev)
-{
- reset_hc((struct uhci *) pci_get_drvdata(dev));
- start_hc((struct uhci *) pci_get_drvdata(dev));
- return 0;
-}
-#endif
-
-static const struct pci_device_id __devinitdata uhci_pci_ids[] = { {
-
- /* handle any USB UHCI controller */
- class: ((PCI_CLASS_SERIAL_USB << 8) | 0x00),
- class_mask: ~0,
-
- /* no matter who makes it */
- vendor: PCI_ANY_ID,
- device: PCI_ANY_ID,
- subvendor: PCI_ANY_ID,
- subdevice: PCI_ANY_ID,
-
- }, { /* end: all zeroes */ }
-};
-
-MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
-
-static struct pci_driver uhci_pci_driver = {
- name: "usb-uhci",
- id_table: uhci_pci_ids,
-
- probe: uhci_pci_probe,
- remove: __devexit_p(uhci_pci_remove),
-
-#ifdef CONFIG_PM
- suspend: uhci_pci_suspend,
- resume: uhci_pci_resume,
-#endif /* PM */
-};
-
-
-static int __init uhci_hcd_init(void)
-{
- int retval = -ENOMEM;
-
- info(DRIVER_DESC " " DRIVER_VERSION);
-
- if (debug) {
- errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
- if (!errbuf)
- goto errbuf_failed;
- }
-
-#ifdef CONFIG_PROC_FS
- uhci_proc_root = create_proc_entry("driver/uhci", S_IFDIR, 0);
- if (!uhci_proc_root)
- goto proc_failed;
-#endif
-
- uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
- sizeof(struct urb_priv), 0, 0, NULL, NULL);
- if (!uhci_up_cachep)
- goto up_failed;
-
- retval = pci_module_init(&uhci_pci_driver);
- if (retval)
- goto init_failed;
-
- return 0;
-
-init_failed:
- if (kmem_cache_destroy(uhci_up_cachep))
- printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
-
-up_failed:
-
-#ifdef CONFIG_PROC_FS
- remove_proc_entry("uhci", 0);
-
-proc_failed:
-#endif
- if (errbuf)
- kfree(errbuf);
-
-errbuf_failed:
-
- return retval;
-}
-
-static void __exit uhci_hcd_cleanup(void)
-{
- pci_unregister_driver(&uhci_pci_driver);
-
- if (kmem_cache_destroy(uhci_up_cachep))
- printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
-
-#ifdef CONFIG_PROC_FS
- remove_proc_entry("uhci", 0);
-#endif
-
- if (errbuf)
- kfree(errbuf);
-}
-
-module_init(uhci_hcd_init);
-module_exit(uhci_hcd_cleanup);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)