patch-2.2.18 linux/drivers/usb/uhci.c
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- Lines: 3277
- Date:
Thu Dec 7 14:44:30 2000
- Orig file:
v2.2.17/drivers/usb/uhci.c
- Orig date:
Fri Apr 21 12:46:37 2000
diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/uhci.c linux/drivers/usb/uhci.c
@@ -2,15 +2,18 @@
* Universal Host Controller Interface driver for USB.
*
* (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 1999-2000 Johannes Erdfelt, jerdfelt@sventech.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
*
* 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.
*
- * Oh, well. The intel version is the more common by far. As such,
- * that's the one I care about right now.
- *
* 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:
@@ -18,738 +21,1997 @@
* - working around the horridness of the rest
*/
-/* 4/4/1999 added data toggle for interrupt pipes -keryan */
-
-#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/malloc.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+//#define DEBUG
+#include <linux/usb.h>
-#include <asm/spinlock.h>
+#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include "uhci.h"
-#include "inits.h"
+#include "uhci-debug.h"
-#ifdef CONFIG_APM
-#include <linux/apm_bios.h>
-static int handle_apm_event(apm_event_t event);
-static int apm_resume = 0;
-#endif
+#include <linux/pm.h>
+static int handle_pm_event(struct pm_dev *dev, pm_request_t rqst, void *data);
+
+static int debug = 1;
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug level");
-#define compile_assert(x) do { switch (0) { case 1: case !(x): } } while (0)
+static kmem_cache_t *uhci_td_cachep;
+static kmem_cache_t *uhci_qh_cachep;
+static kmem_cache_t *uhci_up_cachep; /* urb_priv */
-static struct wait_queue *uhci_configure = NULL;
+static LIST_HEAD(uhci_list);
+
+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_generic(struct urb *urb);
+static int uhci_unlink_urb(struct urb *urb);
+
+#define min(a,b) (((a)<(b))?(a):(b))
+
+/* If a transfer is still active after this much time, turn off FSBR */
+#define IDLE_TIMEOUT (HZ / 20) /* 50 ms */
/*
- * Return the result of a TD..
+ * Only the USB core should call uhci_alloc_dev and uhci_free_dev
*/
-static int uhci_td_result(struct uhci_device *dev, struct uhci_td *td)
+static int uhci_alloc_dev(struct usb_device *dev)
{
- unsigned int status;
+ return 0;
+}
- status = (td->status >> 16) & 0xff;
+static int uhci_free_dev(struct usb_device *dev)
+{
+ struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
+ struct list_head *tmp, *head = &uhci->urb_list;
+ unsigned long flags;
- /* Some debugging code */
- if (status) {
- int i = 10;
- struct uhci_td *tmp = dev->control_td;
- printk("uhci_td_result() failed with status %d\n", status);
- show_status(dev->uhci);
- do {
- show_td(tmp);
- tmp++;
- if (!--i)
- break;
- } while (tmp <= td);
+ /* Walk through the entire URB list and forcefully remove any */
+ /* URBs that are still active for that device */
+ nested_lock(&uhci->urblist_lock, flags);
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb *u = list_entry(tmp, struct urb, urb_list);
+
+ tmp = tmp->next;
+
+ if (u->dev == dev)
+ uhci_unlink_urb(u);
}
- return status;
+ nested_unlock(&uhci->urblist_lock, flags);
+
+ return 0;
}
-/*
- * Inserts a td into qh list at the top.
- *
- * Careful about atomicity: even on UP this
- * requires a locked access due to the concurrent
- * DMA engine.
- *
- * NOTE! This assumes that first->last is a valid
- * list of TD's with the proper backpointers set
- * up and all..
- */
-static void uhci_insert_tds_in_qh(struct uhci_qh *qh, struct uhci_td *first, struct uhci_td *last)
+static void uhci_add_urb_list(struct uhci *uhci, struct urb *urb)
{
- unsigned int link = qh->element;
- unsigned int new = 4 | virt_to_bus(first);
+ unsigned long flags;
- for (;;) {
- unsigned char success;
+ nested_lock(&uhci->urblist_lock, flags);
+ list_add(&urb->urb_list, &uhci->urb_list);
+ nested_unlock(&uhci->urblist_lock, flags);
+}
- last->link = link;
- first->backptr = &qh->element;
- asm volatile("lock ; cmpxchg %4,%2 ; sete %0"
- :"=q" (success), "=a" (link)
- :"m" (qh->element), "1" (link), "r" (new)
- :"memory");
- if (success) {
- /* Was there a successor entry? Fix it's backpointer.. */
- if ((link & 1) == 0) {
- struct uhci_td *next = bus_to_virt(link & ~15);
- next->backptr = &last->link;
- }
- break;
- }
+static void uhci_remove_urb_list(struct uhci *uhci, struct urb *urb)
+{
+ unsigned long flags;
+
+ nested_lock(&uhci->urblist_lock, flags);
+ if (!list_empty(&urb->urb_list)) {
+ list_del(&urb->urb_list);
+ INIT_LIST_HEAD(&urb->urb_list);
}
+ nested_unlock(&uhci->urblist_lock, flags);
}
-static inline void uhci_insert_td_in_qh(struct uhci_qh *qh, struct uhci_td *td)
+void uhci_set_next_interrupt(struct uhci *uhci)
{
- uhci_insert_tds_in_qh(qh, td, td);
+ unsigned long flags;
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+ uhci->skel_term_td.status |= TD_CTRL_IOC;
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
}
-static void uhci_insert_qh(struct uhci_qh *qh, struct uhci_qh *newqh)
+void uhci_clear_next_interrupt(struct uhci *uhci)
{
- newqh->link = qh->link;
- qh->link = virt_to_bus(newqh) | 2;
+ unsigned long flags;
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+ uhci->skel_term_td.status &= ~TD_CTRL_IOC;
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
}
-static void uhci_remove_qh(struct uhci_qh *qh, struct uhci_qh *remqh)
+static struct uhci_td *uhci_alloc_td(struct usb_device *dev)
{
- unsigned int remphys = virt_to_bus(remqh);
- struct uhci_qh *lqh = qh;
+ struct uhci_td *td;
- while ((lqh->link & ~0xF) != remphys) {
- if (lqh->link & 1)
- break;
+ td = kmem_cache_alloc(uhci_td_cachep, in_interrupt() ? SLAB_ATOMIC : SLAB_KERNEL);
+ if (!td)
+ return NULL;
+
+ td->link = UHCI_PTR_TERM;
+ td->buffer = 0;
+
+ td->frameptr = NULL;
+ td->nexttd = td->prevtd = NULL;
+ td->dev = dev;
+ INIT_LIST_HEAD(&td->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;
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+
+ /* Fix the linked list pointers */
+ td->nexttd = skeltd->nexttd;
+ td->prevtd = skeltd;
+ if (skeltd->nexttd)
+ skeltd->nexttd->prevtd = td;
+ skeltd->nexttd = td;
+
+ td->link = skeltd->link;
+ skeltd->link = virt_to_bus(td);
+
+ spin_unlock_irqrestore(&uhci->framelist_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
+ */
- lqh = bus_to_virt(lqh->link & ~0xF);
+static void uhci_insert_td_frame_list(struct uhci *uhci, struct uhci_td *td, unsigned framenum)
+{
+ unsigned long flags;
+ struct uhci_td *nexttd;
+
+ framenum %= UHCI_NUMFRAMES;
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+
+ td->frameptr = &uhci->fl->frame[framenum];
+ td->link = uhci->fl->frame[framenum];
+ if (!(td->link & (UHCI_PTR_TERM | UHCI_PTR_QH))) {
+ nexttd = (struct uhci_td *)uhci_ptr_to_virt(td->link);
+ td->nexttd = nexttd;
+ nexttd->prevtd = td;
+ nexttd->frameptr = NULL;
}
+ uhci->fl->frame[framenum] = virt_to_bus(td);
+
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
+}
+
+static void uhci_remove_td(struct uhci *uhci, struct uhci_td *td)
+{
+ unsigned long flags;
- if (lqh->link & 1) {
- printk("couldn't find qh in chain!\n");
+ /* If it's not inserted, don't remove it */
+ if (!td->frameptr && !td->prevtd && !td->nexttd)
return;
- }
- lqh->link = remqh->link;
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+ if (td->frameptr) {
+ *(td->frameptr) = td->link;
+ if (td->nexttd) {
+ td->nexttd->frameptr = td->frameptr;
+ td->nexttd->prevtd = NULL;
+ td->nexttd = NULL;
+ }
+ td->frameptr = NULL;
+ } else {
+ if (td->prevtd) {
+ td->prevtd->nexttd = td->nexttd;
+ td->prevtd->link = td->link;
+ }
+ if (td->nexttd)
+ td->nexttd->prevtd = td->prevtd;
+ td->prevtd = td->nexttd = NULL;
+ }
+ td->link = UHCI_PTR_TERM;
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
}
/*
- * Removes td from qh if present.
- *
- * NOTE! We keep track of both forward and back-pointers,
- * so this should be trivial, right?
- *
- * Wrong. While all TD insert/remove operations are synchronous
- * on the CPU, the UHCI controller can (and does) play with the
- * very first forward pointer. So we need to validate the backptr
- * before we change it, so that we don't by mistake reset the QH
- * head to something old.
+ * Inserts a td into qh list at the top.
*/
-static void uhci_remove_td(struct uhci_td *td)
+static void uhci_insert_tds_in_qh(struct uhci_qh *qh, struct urb *urb, int breadth)
{
- unsigned int *backptr = td->backptr;
- unsigned int link = td->link;
- unsigned int me;
+ struct list_head *tmp, *head;
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+ struct uhci_td *td, *prevtd;
- if (!backptr)
+ if (!urbp)
return;
- td->backptr = NULL;
+ head = &urbp->list;
+ tmp = head->next;
+ if (head == tmp)
+ return;
- /*
- * This is the easy case: the UHCI will never change "td->link",
- * so we can always just look at that and fix up the backpointer
- * of any next element..
- */
- if (!(link & 1)) {
- struct uhci_td *next = bus_to_virt(link & ~15);
- next->backptr = backptr;
+ td = list_entry(tmp, struct uhci_td, list);
+
+ /* Add the first TD to the QH element pointer */
+ qh->element = virt_to_bus(td) | (breadth ? 0 : UHCI_PTR_DEPTH);
+
+ prevtd = 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;
+
+ prevtd->link = virt_to_bus(td) | (breadth ? 0 : UHCI_PTR_DEPTH);
+
+ prevtd = td;
}
- /*
- * The nasty case is "backptr->next", which we need to
- * update to "link" _only_ if "backptr" still points
- * to us (it may not: maybe backptr is a QH->element
- * pointer and the UHCI has changed the value).
- */
- me = virt_to_bus(td) | (0xe & *backptr);
- asm volatile("lock ; cmpxchg %0,%1"
- :
- :"r" (link), "m" (*backptr), "a" (me)
- :"memory");
+ prevtd->link = UHCI_PTR_TERM;
+}
+
+static void uhci_free_td(struct uhci_td *td)
+{
+ if (!list_empty(&td->list))
+ dbg("td is still in URB list!");
+
+ if (td->dev)
+ usb_dec_dev_use(td->dev);
+
+ kmem_cache_free(uhci_td_cachep, td);
}
-static struct uhci_qh *uhci_qh_allocate(struct uhci_device *dev)
+static struct uhci_qh *uhci_alloc_qh(struct usb_device *dev)
{
struct uhci_qh *qh;
- int inuse;
- qh = dev->qh;
- for (; (inuse = test_and_set_bit(0, &qh->inuse)) != 0 && qh < &dev->qh[UHCI_MAXQH]; qh++)
- ;
+ qh = kmem_cache_alloc(uhci_qh_cachep, in_interrupt() ? SLAB_ATOMIC : SLAB_KERNEL);
+ if (!qh)
+ return NULL;
+
+ qh->element = UHCI_PTR_TERM;
+ qh->link = UHCI_PTR_TERM;
- if (!inuse)
- return(qh);
+ qh->dev = dev;
+ qh->prevqh = qh->nextqh = NULL;
- printk("ran out of qh's for dev %p\n", dev);
- return(NULL);
+ INIT_LIST_HEAD(&qh->remove_list);
+
+ usb_inc_dev_use(dev);
+
+ return qh;
}
-static void uhci_qh_deallocate(struct uhci_qh *qh)
+static void uhci_free_qh(struct uhci_qh *qh)
{
- if (qh->element != 1)
- printk("qh %p leaving dangling entries? (%X)\n", qh, qh->element);
+ if (qh->dev)
+ usb_dec_dev_use(qh->dev);
- qh->element = 1;
- qh->link = 1;
-
- clear_bit(0, &qh->inuse);
+ kmem_cache_free(uhci_qh_cachep, qh);
}
-static struct uhci_td *uhci_td_allocate(struct uhci_device *dev)
+static void uhci_insert_qh(struct uhci *uhci, struct uhci_qh *skelqh, struct uhci_qh *qh)
{
- struct uhci_td *td;
- int inuse;
+ unsigned long flags;
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
- td = dev->td;
- for (; (inuse = test_and_set_bit(0, &td->inuse)) != 0 && td < &dev->td[UHCI_MAXTD]; td++)
- ;
+ /* Fix the linked list pointers */
+ qh->nextqh = skelqh->nextqh;
+ qh->prevqh = skelqh;
+ if (skelqh->nextqh)
+ skelqh->nextqh->prevqh = qh;
+ skelqh->nextqh = qh;
- if (!inuse)
- return(td);
+ qh->link = skelqh->link;
+ skelqh->link = virt_to_bus(qh) | UHCI_PTR_QH;
- printk("ran out of td's for dev %p\n", dev);
- return(NULL);
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
}
-/*
- * This MUST only be called when it has been removed from a QH already (or
- * the QH has been removed from the skeleton
- */
-static void uhci_td_deallocate(struct uhci_td *td)
+static void uhci_remove_qh(struct uhci *uhci, struct uhci_qh *qh)
{
- td->link = 1;
+ unsigned long flags;
+ int delayed;
+
+ /* If the QH isn't queued, then we don't need to delay unlink it */
+ delayed = (qh->prevqh || qh->nextqh);
+
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
+ if (qh->prevqh) {
+ qh->prevqh->nextqh = qh->nextqh;
+ qh->prevqh->link = qh->link;
+ }
+ if (qh->nextqh)
+ qh->nextqh->prevqh = qh->prevqh;
+ qh->prevqh = qh->nextqh = NULL;
+ qh->element = qh->link = UHCI_PTR_TERM;
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
+
+ if (delayed) {
+ spin_lock_irqsave(&uhci->qh_remove_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);
+
+ /* Add it */
+ list_add(&qh->remove_list, &uhci->qh_remove_list);
- clear_bit(0, &td->inuse);
+ spin_unlock_irqrestore(&uhci->qh_remove_lock, flags);
+ } else
+ uhci_free_qh(qh);
}
-/*
- * UHCI interrupt list operations..
- */
-static spinlock_t irqlist_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t uhci_append_urb_lock = SPIN_LOCK_UNLOCKED;
-static void uhci_add_irq_list(struct uhci *uhci, struct uhci_td *td, usb_device_irq completed, void *dev_id)
+/* This function will append one URB's QH to another URB's QH. This is for */
+/* USB_QUEUE_BULK support */
+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 *td, *ltd;
unsigned long flags;
- td->completed = completed;
- td->dev_id = dev_id;
+ eurbp = eurb->hcpriv;
+ urbp = urb->hcpriv;
+
+ spin_lock_irqsave(&uhci_append_urb_lock, flags);
+
+ /* Find the beginning URB in the queue */
+ if (eurbp->queued) {
+ struct list_head *head = &eurbp->urb_queue_list;
+
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb_priv *turbp =
+ list_entry(tmp, struct urb_priv, urb_queue_list);
+
+ tmp = tmp->next;
- spin_lock_irqsave(&irqlist_lock, flags);
- list_add(&td->irq_list, &uhci->interrupt_list);
- spin_unlock_irqrestore(&irqlist_lock, flags);
+ if (!turbp->queued)
+ break;
+ }
+ } else
+ tmp = &eurbp->urb_queue_list;
+
+ furbp = list_entry(tmp, struct urb_priv, urb_queue_list);
+
+ tmp = furbp->urb_queue_list.prev;
+ lurbp = list_entry(tmp, struct urb_priv, urb_queue_list);
+
+ /* Add this one to the end */
+ list_add_tail(&urbp->urb_queue_list, &furbp->urb_queue_list);
+
+ /* Grab the last TD from the last URB */
+ ltd = list_entry(lurbp->list.prev, struct uhci_td, list);
+
+ /* Grab the first TD from the first URB */
+ td = list_entry(urbp->list.next, struct uhci_td, list);
+
+ /* No breadth since this will only be called for bulk transfers */
+ ltd->link = virt_to_bus(td);
+
+ spin_unlock_irqrestore(&uhci_append_urb_lock, flags);
}
-static void uhci_remove_irq_list(struct uhci_td *td)
+static void uhci_delete_queued_urb(struct uhci *uhci, struct urb *urb)
{
+ struct urb_priv *urbp, *nurbp;
unsigned long flags;
- spin_lock_irqsave(&irqlist_lock, flags);
- list_del(&td->irq_list);
- spin_unlock_irqrestore(&irqlist_lock, flags);
+ urbp = urb->hcpriv;
+
+ spin_lock_irqsave(&uhci_append_urb_lock, flags);
+
+ nurbp = list_entry(urbp->urb_queue_list.next, struct urb_priv,
+ urb_queue_list);
+
+ if (!urbp->queued) {
+ /* We're the head, so just insert the QH for the next URB */
+ uhci_insert_qh(uhci, &uhci->skel_bulk_qh, nurbp->qh);
+ nurbp->queued = 0;
+ } else {
+ struct urb_priv *purbp;
+ struct uhci_td *ptd;
+
+ /* We're somewhere in the middle (or end). A bit trickier */
+ /* than the head scenario */
+ purbp = list_entry(urbp->urb_queue_list.prev, struct urb_priv,
+ urb_queue_list);
+
+ ptd = list_entry(purbp->list.prev, struct uhci_td, list);
+ if (nurbp->queued)
+ /* Close the gap between the two */
+ ptd->link = virt_to_bus(list_entry(nurbp->list.next,
+ struct uhci_td, list));
+ else
+ /* The next URB happens to be the beggining, so */
+ /* we're the last, end the chain */
+ ptd->link = UHCI_PTR_TERM;
+
+ }
+
+ list_del(&urbp->urb_queue_list);
+
+ spin_unlock_irqrestore(&uhci_append_urb_lock, flags);
}
-/*
- * Request a interrupt handler..
- */
-static int uhci_request_irq(struct usb_device *usb_dev, unsigned int pipe, usb_device_irq handler, int period, void *dev_id)
+struct urb_priv *uhci_alloc_urb_priv(struct urb *urb)
{
- struct uhci_device *dev = usb_to_uhci(usb_dev);
- struct uhci_td *td = uhci_td_allocate(dev);
- struct uhci_qh *interrupt_qh = uhci_qh_allocate(dev);
+ struct urb_priv *urbp;
- unsigned int destination, status;
+ urbp = kmem_cache_alloc(uhci_up_cachep, in_interrupt() ? SLAB_ATOMIC : SLAB_KERNEL);
+ if (!urbp)
+ return NULL;
- /* Destination: pipe destination with INPUT */
- destination = (pipe & 0x0007ff00) | 0x69;
+ memset((void *)urbp, 0, sizeof(*urbp));
- /* Status: slow/fast, Interrupt, Active, Short Packet Detect Infinite Errors */
- status = (pipe & (1 << 26)) | (1 << 24) | (1 << 23) | (1 << 29) | (0 << 27);
+ urbp->inserttime = jiffies;
+ urbp->urb = urb;
+
+ INIT_LIST_HEAD(&urbp->list);
+ INIT_LIST_HEAD(&urbp->urb_queue_list);
- if(interrupt_qh->element != 1)
- printk("interrupt_qh->element = 0x%x\n",
- interrupt_qh->element);
+ urb->hcpriv = urbp;
- td->link = 1;
- td->status = status; /* In */
- td->info = destination | (7 << 21); /* 8 bytes of data */
- td->buffer = virt_to_bus(dev->data);
- td->qh = interrupt_qh;
- interrupt_qh->skel = &dev->uhci->root_hub->skel_int8_qh;
+ usb_inc_dev_use(urb->dev);
- uhci_add_irq_list(dev->uhci, td, handler, dev_id);
+ return urbp;
+}
- uhci_insert_td_in_qh(interrupt_qh, td);
+static void uhci_add_td_to_urb(struct urb *urb, struct uhci_td *td)
+{
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- /* Add it into the skeleton */
- uhci_insert_qh(&dev->uhci->root_hub->skel_int8_qh, interrupt_qh);
- return 0;
-}
+ td->urb = urb;
-/*
- * Control thread operations: we just mark the last TD
- * in a control thread as an interrupt TD, and wake up
- * the front-end on completion.
- *
- * We need to remove the TD from the lists (both interrupt
- * list and TD lists) by hand if something bad happens!
- */
-static struct wait_queue *control_wakeup;
+ list_add_tail(&td->list, &urbp->list);
+}
-static int uhci_control_completed(int status, void *buffer, void *dev_id)
+static void uhci_remove_td_from_urb(struct urb *urb, struct uhci_td *td)
{
- wake_up(&control_wakeup);
- return 0; /* Don't re-instate */
+ urb = NULL; /* No warnings */
+
+ if (list_empty(&td->list))
+ return;
+
+ list_del(&td->list);
+ INIT_LIST_HEAD(&td->list);
+
+ td->urb = NULL;
}
-/* td points to the last td in the list, which interrupts on completion */
-static int uhci_run_control(struct uhci_device *dev, struct uhci_td *first, struct uhci_td *last)
+static void uhci_destroy_urb_priv(struct urb *urb)
{
- struct wait_queue wait = { current, NULL };
- struct uhci_qh *ctrl_qh = uhci_qh_allocate(dev);
- struct uhci_td *curtd;
+ struct list_head *tmp, *head;
+ struct urb_priv *urbp;
+ struct uhci *uhci;
+ struct uhci_td *td;
+ unsigned long flags;
- current->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue(&control_wakeup, &wait);
+ spin_lock_irqsave(&urb->lock, flags);
- uhci_add_irq_list(dev->uhci, last, uhci_control_completed, NULL);
-
- /* FIXME: This is kinda kludged */
- /* Walk the TD list and update the QH pointer */
- {
- int maxcount = 100;
-
- curtd = first;
- do {
- curtd->qh = ctrl_qh;
- if (curtd->link & 1)
- break;
+ urbp = (struct urb_priv *)urb->hcpriv;
+ if (!urbp)
+ goto unlock;
- curtd = bus_to_virt(curtd->link & ~0xF);
- if (!--maxcount) {
- printk("runaway tds!\n");
- break;
- }
- } while (1);
+ if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv)
+ goto unlock;
+
+ uhci = urb->dev->bus->hcpriv;
+
+ head = &urbp->list;
+ tmp = head->next;
+ while (tmp != head) {
+ td = list_entry(tmp, struct uhci_td, list);
+
+ tmp = tmp->next;
+
+ uhci_remove_td_from_urb(urb, td);
+
+ uhci_remove_td(uhci, td);
+
+ uhci_free_td(td);
}
- uhci_insert_tds_in_qh(ctrl_qh, first, last);
+ urb->hcpriv = NULL;
+ kmem_cache_free(uhci_up_cachep, urbp);
- /* Add it into the skeleton */
- uhci_insert_qh(&dev->uhci->root_hub->skel_control_qh, ctrl_qh);
+ usb_dec_dev_use(urb->dev);
+
+unlock:
+ spin_unlock_irqrestore(&urb->lock, flags);
+}
- schedule_timeout(HZ/10);
+static void uhci_inc_fsbr(struct uhci *uhci, struct urb *urb)
+{
+ unsigned long flags;
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
- remove_wait_queue(&control_wakeup, &wait);
+ if (!urbp)
+ return;
- /* Clean up in case it failed.. */
- uhci_remove_irq_list(last);
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
-#if 0
- printk("Looking for tds [%p, %p]\n", dev->control_td, td);
-#endif
+ if (!urbp->fsbr) {
+ urbp->fsbr = 1;
+ if (!uhci->fsbr++)
+ uhci->skel_term_qh.link = virt_to_bus(&uhci->skel_hs_control_qh) | UHCI_PTR_QH;
+ }
+
+ spin_unlock_irqrestore(&uhci->framelist_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;
+
+ if (!urbp)
+ return;
- /* Remove it from the skeleton */
- uhci_remove_qh(&dev->uhci->root_hub->skel_control_qh, ctrl_qh);
+ spin_lock_irqsave(&uhci->framelist_lock, flags);
- uhci_qh_deallocate(ctrl_qh);
+ if (urbp->fsbr) {
+ urbp->fsbr = 0;
+ if (!--uhci->fsbr)
+ uhci->skel_term_qh.link = UHCI_PTR_TERM;
+ }
- return uhci_td_result(dev, last);
+ spin_unlock_irqrestore(&uhci->framelist_lock, flags);
}
/*
- * Send or receive a control message on a pipe.
- *
- * Note that the "pipe" structure is set up to map
- * easily to the uhci destination fields.
- *
- * A control message is built up from three parts:
- * - The command itself
- * - [ optional ] data phase
- * - Status complete phase
+ * Map status to standard result codes
*
- * The data phase can be an arbitrary number of TD's
- * although we currently had better not have more than
- * 29 TD's here (we have 31 TD's allocated for control
- * operations, and two of them are used for command and
- * status).
- *
- * 29 TD's is a minimum of 232 bytes worth of control
- * information, that's just ridiculously high. Most
- * control messages have just a few bytes of data.
+ * <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_control_msg(struct usb_device *usb_dev, unsigned int pipe, void *cmd, void *data, int len)
+static int uhci_map_status(int status, int dir_out)
{
- struct uhci_device *dev = usb_to_uhci(usb_dev);
- struct uhci_td *first, *td, *prevtd;
- unsigned long destination, status;
- int ret;
+ 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 -EPIPE;
+ 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;
- if (len > usb_maxpacket(usb_dev->maxpacketsize) * 29)
- printk("Warning, too much data for a control packet, crashing\n");
+ return -EINVAL;
+}
- first = td = uhci_td_allocate(dev);
+/*
+ * 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;
+ unsigned char *data = urb->transfer_buffer;
- /* The "pipe" thing contains the destination in bits 8--18, 0x2D is SETUP */
- destination = (pipe & 0x0007ff00) | 0x2D;
+ /* The "pipe" thing contains the destination in bits 8--18 */
+ destination = (urb->pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;
- /* Status: slow/fast, Active, Short Packet Detect Three Errors */
- status = (pipe & (1 << 26)) | (1 << 23) | (1 << 29) | (3 << 27);
+ /* 3 errors */
+ status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
/*
* Build the TD for the control request
*/
- td->status = status; /* Try forever */
- td->info = destination | (7 << 21); /* 8 bytes of data */
- td->buffer = virt_to_bus(cmd);
+ td = uhci_alloc_td(urb->dev);
+ if (!td)
+ return -ENOMEM;
+
+ uhci_add_td_to_urb(urb, td);
+ uhci_fill_td(td, status, destination | (7 << 21),
+ virt_to_bus(urb->setup_packet));
/*
* If direction is "send", change the frame from SETUP (0x2D)
- * to OUT (0xE1). Else change it from SETUP to IN (0x69)
+ * to OUT (0xE1). Else change it from SETUP to IN (0x69).
*/
- destination ^= (0x2D ^ 0x69); /* SETUP -> IN */
- if (usb_pipeout(pipe))
- destination ^= (0xE1 ^ 0x69); /* IN -> OUT */
+ destination ^= (USB_PID_SETUP ^ usb_packetid(urb->pipe));
- prevtd = td;
- td = uhci_td_allocate(dev);
- prevtd->link = 4 | virt_to_bus(td);
+ if (!(urb->transfer_flags & USB_DISABLE_SPD))
+ status |= TD_CTRL_SPD;
/*
* Build the DATA TD's
*/
while (len > 0) {
- /* Build the TD for control status */
int pktsze = len;
- int maxsze = usb_maxpacket(pipe);
if (pktsze > maxsze)
pktsze = maxsze;
+ td = uhci_alloc_td(urb->dev);
+ if (!td)
+ return -ENOMEM;
+
/* Alternate Data0/1 (start with Data1) */
- destination ^= 1 << 19;
+ destination ^= 1 << TD_TOKEN_TOGGLE;
- td->status = status; /* Status */
- td->info = destination | ((pktsze-1) << 21); /* pktsze bytes of data */
- td->buffer = virt_to_bus(data);
- td->backptr = &prevtd->link;
+ uhci_add_td_to_urb(urb, td);
+ uhci_fill_td(td, status, destination | ((pktsze - 1) << 21),
+ virt_to_bus(data));
- prevtd = td;
- td = uhci_td_allocate(dev);
- prevtd->link = 4 | virt_to_bus(td); /* Update previous TD */
+ data += pktsze;
+ len -= pktsze;
+ }
- data += maxsze;
- len -= maxsze;
+ /*
+ * Build the final TD for control status
+ */
+ td = uhci_alloc_td(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_PID;
+ if (usb_pipeout(urb->pipe) || !urb->transfer_buffer_length)
+ destination |= USB_PID_IN;
+ else
+ destination |= USB_PID_OUT;
+
+ destination |= 1 << 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(urb->dev);
+ if (!qh)
+ return -ENOMEM;
+
+ /* 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, qh);
+ } else {
+ uhci_insert_tds_in_qh(qh, urb, 1);
+ uhci_insert_qh(uhci, &uhci->skel_hs_control_qh, qh);
+ uhci_inc_fsbr(uhci, urb);
+ }
+
+ urbp->qh = qh;
+
+ uhci_add_urb_list(uhci, urb);
+
+ usb_inc_dev_use(urb->dev);
+
+ 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 (!urbp)
+ return -EINVAL;
+
+ head = &urbp->list;
+ if (head->next == head)
+ return -EINVAL;
+
+ 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;
+
+ if (urbp->fsbr_timeout && (td->status & TD_CTRL_IOC) &&
+ !(td->status & TD_CTRL_ACTIVE)) {
+ uhci_inc_fsbr(urb->dev->bus->hcpriv, urb);
+ urbp->fsbr_timeout = 0;
+ td->status &= ~TD_CTRL_IOC;
+ }
+
+ 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 && ret != -EPIPE) {
+ /* Some debugging code */
+ dbg("uhci_result_control() failed with status %x", status);
+
+ /* Print the chain for debugging purposes */
+ uhci_show_urb_queue(urb);
+ }
+
+ 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->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(urb, td);
+
+ uhci_remove_td(uhci, td);
+
+ uhci_free_td(td);
+ }
+
+ urbp->qh = uhci_alloc_qh(urb->dev);
+ if (!urbp->qh) {
+ err("unable to allocate new QH for control retrigger");
+ return -ENOMEM;
+ }
+
+ /* 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, urbp->qh);
+ else
+ uhci_insert_qh(uhci, &uhci->skel_hs_control_qh, urbp->qh);
+
+ 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;
+
+ 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(urb->dev);
+ if (!td)
+ return -ENOMEM;
+
+ destination |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE);
+ 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,
+ virt_to_bus(urb->transfer_buffer));
+
+ uhci_insert_td(uhci, &uhci->skeltd[__interval_to_skel(urb->interval)], td);
+
+ uhci_add_urb_list(uhci, urb);
+
+ 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;
+
+ if (!urbp)
+ return -EINVAL;
+
+ urb->actual_length = 0;
+
+ head = &urbp->list;
+ tmp = head->next;
+ while (tmp != head) {
+ td = list_entry(tmp, struct uhci_td, list);
+
+ tmp = tmp->next;
+
+ if (urbp->fsbr_timeout && (td->status & TD_CTRL_IOC) &&
+ !(td->status & TD_CTRL_ACTIVE)) {
+ uhci_inc_fsbr(urb->dev->bus->hcpriv, urb);
+ urbp->fsbr_timeout = 0;
+ td->status &= ~TD_CTRL_IOC;
+ }
+
+ 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)) {
+ usb_settoggle(urb->dev, uhci_endpoint(td->info),
+ uhci_packetout(td->info),
+ uhci_toggle(td->info) ^ 1);
+
+ 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 && ret != -EPIPE) {
+ /* Some debugging code */
+ dbg("uhci_result_interrupt/bulk() failed with status %x",
+ status);
+
+ /* Print the chain for debugging purposes */
+ if (urbp->qh)
+ uhci_show_urb_queue(urb);
+ else
+ uhci_show_td(td);
}
+ return ret;
+}
+
+static void uhci_reset_interrupt(struct urb *urb)
+{
+ struct list_head *tmp;
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+ struct uhci_td *td;
+
+ if (!urbp)
+ return;
+
+ tmp = urbp->list.next;
+ td = list_entry(tmp, struct uhci_td, list);
+ if (!td)
+ return;
+
+ td->status = (td->status & 0x2F000000) | TD_CTRL_ACTIVE | TD_CTRL_IOC;
+ td->info &= ~(1 << TD_TOKEN_TOGGLE);
+ td->info |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE);
+ usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
+
+ urb->status = -EINPROGRESS;
+}
+
+/*
+ * 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;
+ unsigned char *data = urb->transfer_buffer;
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+ 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 final TD for control status
+ * Build the DATA TD's
*/
- destination ^= (0xE1 ^ 0x69); /* OUT -> IN */
- destination |= 1 << 19; /* End in Data1 */
+ do { /* Allow zero length packets */
+ int pktsze = len;
+
+ if (pktsze > maxsze)
+ pktsze = maxsze;
+
+ td = uhci_alloc_td(urb->dev);
+ if (!td)
+ return -ENOMEM;
+
+ uhci_add_td_to_urb(urb, td);
+ uhci_fill_td(td, status, destination | ((pktsze - 1) << 21) |
+ (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE),
+ virt_to_bus(data));
+
+ data += pktsze;
+ len -= maxsze;
+
+ if (len <= 0)
+ td->status |= TD_CTRL_IOC;
+
+ usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe));
+ } while (len > 0);
+
+ qh = uhci_alloc_qh(urb->dev);
+ if (!qh)
+ return -ENOMEM;
+
+ urbp->qh = qh;
+
+ /* Always assume depth first */
+ uhci_insert_tds_in_qh(qh, urb, 1);
+
+ if (urb->transfer_flags & USB_QUEUE_BULK && eurb) {
+ urbp->queued = 1;
+ uhci_append_queued_urb(uhci, eurb, urb);
+ } else
+ uhci_insert_qh(uhci, &uhci->skel_bulk_qh, qh);
+
+ uhci_add_urb_list(uhci, 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 = &uhci->urb_list;
+ int ret = 0;
+ unsigned long flags;
+
+ nested_lock(&uhci->urblist_lock, flags);
+ 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 */
+
+ nested_unlock(&uhci->urblist_lock, flags);
+
+ 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;
+}
+
+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;
+
+ 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(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),
+ virt_to_bus(urb->transfer_buffer + 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);
+ }
+
+ uhci_add_urb_list(uhci, urb);
+
+ 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;
+
+ if (!urbp)
+ return -EINVAL;
+
+ urb->actual_length = 0;
+
+ i = 0;
+ head = &urbp->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 != 0) {
+ urb->error_count++;
+ ret = status;
+ }
+
+ i++;
+ }
+
+ return ret;
+}
+
+static struct urb *uhci_find_urb_ep(struct uhci *uhci, struct urb *urb)
+{
+ struct list_head *tmp, *head = &uhci->urb_list;
+ unsigned long flags;
+ struct urb *u = NULL;
+
+ if (usb_pipeisoc(urb->pipe))
+ return NULL;
+
+ nested_lock(&uhci->urblist_lock, flags);
+ tmp = head->next;
+ while (tmp != head) {
+ u = list_entry(tmp, struct urb, urb_list);
+
+ tmp = tmp->next;
+
+ if (u->dev == urb->dev &&
+ u->pipe == urb->pipe)
+ goto found;
+ }
+ u = NULL;
+
+found:
+ nested_unlock(&uhci->urblist_lock, flags);
+
+ return u;
+}
+
+static int uhci_submit_urb(struct urb *urb)
+{
+ int ret = -EINVAL;
+ struct uhci *uhci;
+ unsigned long flags;
+ struct urb *u;
+ int bustime;
+
+ if (!urb)
+ return -EINVAL;
+
+ if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv)
+ return -ENODEV;
+
+ uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+ /* Short circuit the virtual root hub */
+ if (usb_pipedevice(urb->pipe) == uhci->rh.devnum)
+ return rh_submit_urb(urb);
+
+ u = uhci_find_urb_ep(uhci, urb);
+ if (u && !(urb->transfer_flags & USB_QUEUE_BULK))
+ return -ENXIO;
+
+ spin_lock_irqsave(&urb->lock, flags);
+
+ if (!uhci_alloc_urb_priv(urb)) {
+ spin_unlock_irqrestore(&urb->lock, flags);
+ return -ENOMEM;
+ }
+
+ 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, u);
+ 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;
+ }
+
+ urb->status = ret;
+
+ spin_unlock_irqrestore(&urb->lock, flags);
+
+ if (ret == -EINPROGRESS)
+ ret = 0;
+ else
+ uhci_unlink_generic(urb);
+
+ return ret;
+}
+
+/*
+ * Return the result of a transfer
+ *
+ * Must be called with urblist_lock acquired
+ */
+static void uhci_transfer_result(struct urb *urb)
+{
+ struct urb *turb;
+ int proceed = 0, is_ring = 0;
+ int ret = -EINVAL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&urb->lock, flags);
+
+ 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;
+ }
+
+ urb->status = ret;
+
+ spin_unlock_irqrestore(&urb->lock, flags);
+
+ if (ret == -EINPROGRESS)
+ return;
+
+ 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(urb);
+ break;
+ case PIPE_INTERRUPT:
+ /* Interrupts are an exception */
+ urb->complete(urb);
+ if (urb->interval)
+ uhci_reset_interrupt(urb);
+ else {
+ /* Release bandwidth for Interrupt or Isoc. transfers */
+ /* Spinlock needed ? */
+ if (urb->bandwidth)
+ usb_release_bandwidth (urb->dev, urb, 0);
+ uhci_unlink_generic(urb);
+ }
+ return; /* <-- Note the return */
+ }
+
+ if (urb->next) {
+ turb = urb->next;
+ do {
+ if (turb->status != -EINPROGRESS) {
+ proceed = 1;
+ break;
+ }
+
+ turb = turb->next;
+ } while (turb && turb != urb && turb != urb->next);
+
+ if (turb == urb || turb == urb->next)
+ is_ring = 1;
+ }
+
+ if (urb->complete && (!proceed || (urb->transfer_flags & USB_URB_EARLY_COMPLETE))) {
+ urb->complete(urb);
+ if (!proceed && is_ring)
+ uhci_submit_urb(urb);
+ }
+
+ if (proceed && urb->next) {
+ turb = urb->next;
+ do {
+ if (turb->status != -EINPROGRESS &&
+ uhci_submit_urb(turb) != 0)
+
+ turb = turb->next;
+ } while (turb && turb != urb->next);
+
+ if (urb->complete && !(urb->transfer_flags & USB_URB_EARLY_COMPLETE))
+ urb->complete(urb);
+ }
+}
+
+static int uhci_unlink_generic(struct urb *urb)
+{
+ struct urb_priv *urbp = urb->hcpriv;
+ struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
- td->link = 1; /* Terminate */
- td->status = status | (1 << 24); /* IOC */
- td->info = destination | (0x7ff << 21); /* 0 bytes of data */
- td->buffer = 0;
- td->backptr = &prevtd->link;
+ if (!urbp)
+ return -EINVAL;
- /* Start it up.. */
- ret = uhci_run_control(dev, first, td);
+ uhci_dec_fsbr(uhci, urb); /* Safe since it checks */
- {
- int maxcount = 100;
- struct uhci_td *curtd = first;
- unsigned int nextlink;
+ uhci_remove_urb_list(uhci, urb);
- do {
- nextlink = curtd->link;
- uhci_remove_td(curtd);
- uhci_td_deallocate(curtd);
- if (nextlink & 1) /* Tail? */
- break;
+ if (urbp->qh)
+ /* The interrupt loop will reclaim the QH's */
+ uhci_remove_qh(uhci, urbp->qh);
- curtd = bus_to_virt(nextlink & ~0xF);
- if (!--maxcount) {
- printk("runaway td's!?\n");
- break;
- }
- } while (1);
- }
+ if (!list_empty(&urbp->urb_queue_list))
+ uhci_delete_queued_urb(uhci, urb);
- return ret;
+ uhci_destroy_urb_priv(urb);
+
+ return 0;
}
-static struct usb_device *uhci_usb_allocate(struct usb_device *parent)
+static int uhci_unlink_urb(struct urb *urb)
{
- struct usb_device *usb_dev;
- struct uhci_device *dev;
- int i;
+ struct uhci *uhci;
+ int ret = 0;
+ unsigned long flags;
- usb_dev = kmalloc(sizeof(*usb_dev), GFP_KERNEL);
- if (!usb_dev)
- return NULL;
+ if (!urb)
+ return -EINVAL;
- memset(usb_dev, 0, sizeof(*usb_dev));
+ if (!urb->dev || !urb->dev->bus)
+ return -ENODEV;
- dev = kmalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev) {
- usb_destroy_configuration(usb_dev);
- kfree(usb_dev);
- return NULL;
- }
+ uhci = (struct uhci *)urb->dev->bus->hcpriv;
- /* Initialize "dev" */
- memset(dev, 0, sizeof(*dev));
+ /* Short circuit the virtual root hub */
+ if (usb_pipedevice(urb->pipe) == uhci->rh.devnum)
+ return rh_unlink_urb(urb);
+
+ /* 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;
+ }
+ }
- usb_dev->hcpriv = dev;
- dev->usb = usb_dev;
+ if (urb->status == -EINPROGRESS) {
+ uhci_unlink_generic(urb);
- usb_dev->parent = parent;
+ if (urb->transfer_flags & USB_ASYNC_UNLINK) {
+ urb->status = -ECONNABORTED;
- if (parent) {
- usb_dev->bus = parent->bus;
- dev->uhci = usb_to_uhci(parent)->uhci;
- }
+ spin_lock_irqsave(&uhci->urb_remove_lock, flags);
- /* Reset the QH's and TD's */
- for (i = 0; i < UHCI_MAXQH; i++) {
- dev->qh[i].link = 1;
- dev->qh[i].element = 1;
- dev->qh[i].inuse = 0;
- }
+ /* Check to see if the remove list is empty */
+ if (list_empty(&uhci->urb_remove_list))
+ uhci_set_next_interrupt(uhci);
+
+ list_add(&urb->urb_list, &uhci->urb_remove_list);
+
+ spin_unlock_irqrestore(&uhci->urb_remove_lock, flags);
+ } else {
+ urb->status = -ENOENT;
+
+ 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);
- for (i = 0; i < UHCI_MAXTD; i++) {
- dev->td[i].link = 1;
- dev->td[i].inuse = 0;
+ if (urb->complete)
+ urb->complete(urb);
+ }
}
- return usb_dev;
+ return ret;
}
-static int uhci_usb_deallocate(struct usb_device *usb_dev)
+static int uhci_fsbr_timeout(struct uhci *uhci, struct urb *urb)
{
- struct uhci_device *dev = usb_to_uhci(usb_dev);
- int i;
+ struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+ struct list_head *head, *tmp;
- /* There are UHCI_MAXTD preallocated tds */
- for (i = 0; i < UHCI_MAXTD; ++i) {
- struct uhci_td *td = dev->td + i;
+ uhci_dec_fsbr(uhci, urb);
- /* And remove it from the irq list, if it's active */
- if (td->status & (1 << 23))
- uhci_remove_irq_list(td);
+ /* There is a race with updating IOC in here, but it's not worth */
+ /* trying to fix since this is merely an optimization. The only */
+ /* time we'd lose is if the status of the packet got updated */
+ /* and we'd be turning on FSBR next frame anyway, so it's a wash */
+ urbp->fsbr_timeout = 1;
- if (td->inuse)
- uhci_remove_td(td);
- }
+ head = &urbp->list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
- /* Remove the td from any queues */
- for (i = 0; i < UHCI_MAXQH; ++i) {
- struct uhci_qh *qh = dev->qh + i;
+ tmp = tmp->next;
- if (qh->inuse)
- uhci_remove_qh(qh->skel, qh);
+ if (td->status & TD_CTRL_ACTIVE) {
+ td->status |= TD_CTRL_IOC;
+ break;
+ }
}
- kfree(dev);
- usb_destroy_configuration(usb_dev);
- kfree(usb_dev);
-
return 0;
}
-struct usb_operations uhci_device_operations = {
- uhci_usb_allocate,
- uhci_usb_deallocate,
- uhci_control_msg,
- uhci_request_irq,
-};
-
/*
- * This is just incredibly fragile. The timings must be just
- * right, and they aren't really documented very well.
+ * uhci_get_current_frame_number()
*
- * Note the short delay between disabling reset and enabling
- * the port..
+ * returns the current frame number for a USB bus/controller.
*/
-static void uhci_reset_port(unsigned int port)
+static int uhci_get_current_frame_number(struct usb_device *dev)
{
- unsigned short status;
+ struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
- status = inw(port);
- outw(status | USBPORTSC_PR, port); /* reset port */
- wait_ms(10);
- outw(status & ~USBPORTSC_PR, port);
- udelay(5);
+ return inw(uhci->io_addr + USBFRNUM);
+}
- status = inw(port);
- outw(status | USBPORTSC_PE, port); /* enable port */
- wait_ms(10);
+struct usb_operations uhci_device_operations = {
+ uhci_alloc_dev,
+ uhci_free_dev,
+ uhci_get_current_frame_number,
+ uhci_submit_urb,
+ uhci_unlink_urb
+};
- status = inw(port);
- if(!(status & USBPORTSC_PE)) {
- outw(status | USBPORTSC_PE, port); /* one more try at enabling port */
- wait_ms(50);
- }
+/* -------------------------------------------------------------------
+ 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 */
+};
-/*
- * This gets called if the connect status on the root
- * hub (and the root hub only) changes.
- */
-static void uhci_connect_change(struct uhci *uhci, unsigned int port, unsigned int nr)
+static __u8 root_hub_hub_des[] =
{
- struct usb_device *usb_dev;
- struct uhci_device *dev;
- unsigned short status;
+ 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 *** */
+};
- printk("uhci_connect_change: called for %d\n", nr);
+/*-------------------------------------------------------------------------*/
+/* prepare Interrupt pipe transaction data; HUB INTERRUPT ENDPOINT */
+static int rh_send_irq(struct urb *urb)
+{
+ int i, len = 1;
+ struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+ unsigned int io_addr = uhci->io_addr;
+ __u16 data = 0;
- /*
- * Even if the status says we're connected,
- * the fact that the status bits changed may
- * that we got disconnected and then reconnected.
- *
- * So start off by getting rid of any old devices..
- */
- usb_disconnect(&uhci->root_hub->usb->children[nr]);
+ 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;
+ }
- status = inw(port);
+ *(__u16 *) urb->transfer_buffer = cpu_to_le16(data);
+ urb->actual_length = len;
+ urb->status = USB_ST_NOERROR;
- /* If we have nothing connected, then clear change status and disable the port */
- status = (status & ~USBPORTSC_PE) | USBPORTSC_PEC;
- if (!(status & USBPORTSC_CCS)) {
- outw(status, port);
- return;
+ 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);
+ urb->complete(urb);
}
- /*
- * Ok, we got a new connection. Allocate a device to it,
- * and find out what it wants to do..
- */
- usb_dev = uhci_usb_allocate(uhci->root_hub->usb);
- dev = usb_dev->hcpriv;
+ return USB_ST_NOERROR;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Virtual Root Hub INTs are polled by this timer every "interval" ms */
+static int rh_init_int_timer(struct urb *urb);
- dev->uhci = uhci;
+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 *tmp, *head = &uhci->urb_list;
+ struct urb_priv *urbp;
+ int len;
+ unsigned long flags;
- usb_connect(usb_dev);
+ if (uhci->rh.send) {
+ len = rh_send_irq(urb);
+ if (len > 0) {
+ urb->actual_length = len;
+ if (urb->complete)
+ urb->complete(urb);
+ }
+ }
- uhci->root_hub->usb->children[nr] = usb_dev;
+ nested_lock(&uhci->urblist_lock, flags);
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb *u = list_entry(tmp, urb_t, urb_list);
- wait_ms(200); /* wait for powerup */
- uhci_reset_port(port);
+ tmp = tmp->next;
- /* Get speed information */
- usb_dev->slow = (inw(port) & USBPORTSC_LSDA) ? 1 : 0;
+ urbp = (struct urb_priv *)u->hcpriv;
+ if (urbp) {
+ /* Check if the FSBR timed out */
+ if (urbp->fsbr && time_after(urbp->inserttime + IDLE_TIMEOUT, jiffies))
+ uhci_fsbr_timeout(uhci, u);
+
+ /* Check if the URB timed out */
+ if (u->timeout && time_after(u->timeout, jiffies)) {
+ u->transfer_flags |= USB_ASYNC_UNLINK | USB_TIMEOUT_KILLED;
+ uhci_unlink_urb(u);
+ }
+ }
+ }
+ nested_unlock(&uhci->urblist_lock, flags);
- /*
- * Ok, all the stuff specific to the root hub has been done.
- * The rest is generic for any new USB attach, regardless of
- * hub type.
- */
- usb_new_device(usb_dev);
+ rh_init_int_timer(urb);
}
-/*
- * This gets called when the root hub configuration
- * has changed. Just go through each port, seeing if
- * there is something interesting happening.
- */
-static void uhci_check_configuration(struct uhci *uhci)
+/*-------------------------------------------------------------------------*/
+/* Root Hub INTs are polled by this timer */
+static int rh_init_int_timer(struct urb *urb)
{
- unsigned int io_addr = uhci->io_addr + USBPORTSC1;
- int maxchild = uhci->root_hub->usb->maxchild;
- int nr = 0;
+ 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);
- do {
- unsigned short status = inw(io_addr);
+ return 0;
+}
- if (status & USBPORTSC_CSC)
- uhci_connect_change(uhci, io_addr, nr);
+/*-------------------------------------------------------------------------*/
+#define OK(x) len = (x); break
- nr++; io_addr += 2;
- } while (nr < maxchild);
+#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;
+ devrequest *cmd = (devrequest *)urb->setup_packet;
+ void *data = urb->transfer_buffer;
+ int leni = urb->transfer_buffer_length;
+ int len = 0;
+ int status = 0;
+ int stat = USB_ST_NOERROR;
+ 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 USB_ST_NOERROR;
+ }
+
+ bmRType_bReq = cmd->requesttype | cmd->request << 8;
+ wValue = le16_to_cpu(cmd->value);
+ wIndex = le16_to_cpu(cmd->index);
+ wLength = le16_to_cpu(cmd->length);
+
+ 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);
+ wait_ms(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);
+ wait_ms(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(leni, min(sizeof(root_hub_dev_des), wLength));
+ memcpy(data, root_hub_dev_des, len);
+ OK(len);
+ case 0x02: /* configuration descriptor */
+ len = min(leni, min(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 (leni, len));
+ } else
+ stat = -EPIPE;
+ }
+ break;
+ case RH_GET_DESCRIPTOR | RH_CLASS:
+ root_hub_hub_des[2] = uhci->rh.numports;
+ len = min(leni, min(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;
+ urb->status = stat;
+ if (urb->complete)
+ urb->complete(urb);
+
+ return USB_ST_NOERROR;
+}
+/*-------------------------------------------------------------------------*/
+
+static int rh_unlink_urb(struct urb *urb)
+{
+ struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+ if (uhci->rh.urb == urb) {
+ uhci->rh.send = 0;
+ del_timer(&uhci->rh.rh_int_timer);
+ }
+ return 0;
}
+/*-------------------------------------------------------------------*/
-static void uhci_interrupt_notify(struct uhci *uhci)
+void uhci_free_pending_qhs(struct uhci *uhci)
{
- struct list_head *head = &uhci->interrupt_list;
- struct list_head *tmp;
+ struct list_head *tmp, *head;
+ unsigned long flags;
- spin_lock(&irqlist_lock);
+ /* Free any pending QH's */
+ spin_lock_irqsave(&uhci->qh_remove_lock, flags);
+ head = &uhci->qh_remove_list;
tmp = head->next;
while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, irq_list);
- struct list_head *next;
+ struct uhci_qh *qh = list_entry(tmp, struct uhci_qh, remove_list);
- next = tmp->next;
+ tmp = tmp->next;
- if (!(td->status & (1 << 23))) { /* No longer active? */
- /* remove from IRQ list */
- __list_del(tmp->prev, next);
- INIT_LIST_HEAD(tmp);
- if (td->completed(td->status, bus_to_virt(td->buffer), td->dev_id)) {
- struct uhci_qh *interrupt_qh = td->qh;
-
- list_add(&td->irq_list, &uhci->interrupt_list);
- td->info ^= 1 << 19; /* toggle between data0 and data1 */
- td->status = (td->status & 0x2f000000) | (1 << 23) | (1 << 24); /* active */
-
- /* Remove then readd? Is that necessary */
- uhci_remove_td(td);
- uhci_insert_td_in_qh(interrupt_qh, td);
- }
- /* If completed wants to not reactivate, then it's */
- /* responsible for free'ing the TD's and QH's */
- /* or another function (such as run_control) */
- }
- tmp = next;
- }
- spin_unlock(&irqlist_lock);
-}
+ list_del(&qh->remove_list);
-/*
- * Check port status - Connect Status Change - for
- * each of the attached ports (defaults to two ports,
- * but at least in theory there can be more of them).
- *
- * Wake up the configurator if something happened, we
- * can't really do much at interrupt time.
- */
-static void uhci_root_hub_events(struct uhci *uhci, unsigned int io_addr)
-{
- if (waitqueue_active(&uhci_configure)) {
- int ports = uhci->root_hub->usb->maxchild;
- io_addr += USBPORTSC1;
- do {
- if (inw(io_addr) & USBPORTSC_CSC) {
- wake_up(&uhci_configure);
- return;
- }
- io_addr += 2;
- } while (--ports > 0);
+ uhci_free_qh(qh);
}
+ spin_unlock_irqrestore(&uhci->qh_remove_lock, flags);
}
static void uhci_interrupt(int irq, void *__uhci, struct pt_regs *regs)
@@ -757,39 +2019,63 @@
struct uhci *uhci = __uhci;
unsigned int io_addr = uhci->io_addr;
unsigned short status;
+ unsigned long flags;
+ struct list_head *tmp, *head;
/*
- * Read the interrupt status, and write it back to clear the interrupt cause
+ * 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);
- /* Walk the list of pending TD's to see which ones completed.. */
- uhci_interrupt_notify(uhci);
+ if (status & ~(USBSTS_USBINT | USBSTS_ERROR)) {
+ if (status & USBSTS_RD)
+ printk(KERN_INFO "uhci: resume detected, not implemented\n");
+ if (status & USBSTS_HSE)
+ printk(KERN_ERR "uhci: host system error, PCI problems?\n");
+ if (status & USBSTS_HCPE)
+ printk(KERN_ERR "uhci: host controller process error. something bad happened\n");
+ if (status & USBSTS_HCH) {
+ printk(KERN_ERR "uhci: host controller halted. very bad\n");
+ /* FIXME: Reset the controller, fix the offending TD */
+ }
+ }
- /* Check if there are any events on the root hub.. */
- uhci_root_hub_events(uhci, io_addr);
-}
+ uhci_free_pending_qhs(uhci);
-/*
- * We init one packet, and mark it just IOC and _not_
- * active. Which will result in no actual USB traffic,
- * but _will_ result in an interrupt every second.
- *
- * Which is exactly what we want.
- */
-static void uhci_init_ticktd(struct uhci *uhci)
-{
- struct uhci_device *dev = uhci->root_hub;
- struct uhci_td *td = uhci_td_allocate(dev);
+ spin_lock(&uhci->urb_remove_lock);
+ head = &uhci->urb_remove_list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb *urb = list_entry(tmp, struct urb, urb_list);
- td->link = 1;
- td->status = (1 << 24); /* interrupt on completion */
- td->info = (15 << 21) | 0x7f69; /* (ignored) input packet, 16 bytes, device 127 */
- td->buffer = 0;
- td->qh = NULL;
+ tmp = tmp->next;
+
+ list_del(&urb->urb_list);
+
+ if (urb->complete)
+ urb->complete(urb);
+ }
+ spin_unlock(&uhci->urb_remove_lock);
+
+ uhci_clear_next_interrupt(uhci);
+
+ /* Walk the list of pending TD's to see which ones completed */
+ nested_lock(&uhci->urblist_lock, flags);
+ head = &uhci->urb_list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb *urb = list_entry(tmp, struct urb, urb_list);
+
+ tmp = tmp->next;
- uhci->fl->frame[0] = virt_to_bus(td);
+ /* Checks the status and does all of the magic necessary */
+ uhci_transfer_result(urb);
+ }
+ nested_unlock(&uhci->urblist_lock, flags);
}
static void reset_hc(struct uhci *uhci)
@@ -797,9 +2083,9 @@
unsigned int io_addr = uhci->io_addr;
/* Global reset for 50ms */
- outw(USBCMD_GRESET, io_addr+USBCMD);
+ outw(USBCMD_GRESET, io_addr + USBCMD);
wait_ms(50);
- outw(0, io_addr+USBCMD);
+ outw(0, io_addr + USBCMD);
wait_ms(10);
}
@@ -808,8 +2094,6 @@
unsigned int io_addr = uhci->io_addr;
int timeout = 1000;
- uhci_init_ticktd(uhci);
-
/*
* Reset the HC - this will force us to get a
* new notification of any already connected
@@ -819,21 +2103,25 @@
outw(USBCMD_HCRESET, io_addr + USBCMD);
while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
if (!--timeout) {
- printk("USBCMD_HCRESET timed out!\n");
+ printk(KERN_ERR "uhci: USBCMD_HCRESET timed out!\n");
break;
}
}
- outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP, io_addr + USBINTR);
+ /* 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(virt_to_bus(uhci->fl), io_addr + USBFLBASEADD);
/* Run and mark it configured with a 64-byte max packet */
- outw(USBCMD_RS | USBCMD_CF, io_addr + USBCMD);
+ outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
}
/*
- * Allocate a frame list, and four regular queues.
+ * 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
@@ -843,20 +2131,14 @@
* 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".
+ * - The second queue is the "control queue", split into low and high speed
* - The third queue is "bulk data".
- *
- * We could certainly have multiple queues of the same
- * type, and maybe we should. We could have per-device
- * queues, for example. We begin small.
*/
-static struct uhci *alloc_uhci(unsigned int io_addr)
+static struct uhci *alloc_uhci(unsigned int io_addr, unsigned int io_size)
{
- int i;
+ int i, port;
struct uhci *uhci;
struct usb_bus *bus;
- struct uhci_device *dev;
- struct usb_device *usb;
uhci = kmalloc(sizeof(*uhci), GFP_KERNEL);
if (!uhci)
@@ -866,69 +2148,87 @@
uhci->irq = -1;
uhci->io_addr = io_addr;
- INIT_LIST_HEAD(&uhci->interrupt_list);
+ uhci->io_size = io_size;
+
+ spin_lock_init(&uhci->qh_remove_lock);
+ INIT_LIST_HEAD(&uhci->qh_remove_list);
+
+ spin_lock_init(&uhci->urb_remove_lock);
+ INIT_LIST_HEAD(&uhci->urb_remove_list);
+
+ nested_init(&uhci->urblist_lock);
+ INIT_LIST_HEAD(&uhci->urb_list);
+
+ spin_lock_init(&uhci->framelist_lock);
/* We need exactly one page (per UHCI specs), how convenient */
+ /* We assume that one page is atleast 4k (1024 frames * 4 bytes) */
uhci->fl = (void *)__get_free_page(GFP_KERNEL);
+ if (!uhci->fl)
+ goto au_free_uhci;
- bus = kmalloc(sizeof(*bus), GFP_KERNEL);
+ bus = usb_alloc_bus(&uhci_device_operations);
if (!bus)
- return NULL;
-
- memset(bus, 0, sizeof(*bus));
+ goto au_free_fl;
uhci->bus = bus;
bus->hcpriv = uhci;
- bus->op = &uhci_device_operations;
- /*
- * We allocate a 8kB area for the UHCI hub. The area
- * is described by the uhci_device structure, and basically
- * contains everything needed for normal operation.
- *
- * The first page is the actual device descriptor for the
- * hub.
- *
- * The second page is used for the frame list.
- */
- usb = uhci_usb_allocate(NULL);
- if (!usb)
- return NULL;
+ /* Initialize the root hub */
- dev = uhci->root_hub = usb_to_uhci(usb);
+ /* 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 < (io_size - 0x10) / 2; port++) {
+ unsigned int portstatus;
- usb->bus = bus;
+ portstatus = inw(io_addr + 0x10 + (port * 2));
+ if (!(portstatus & 0x0080))
+ break;
+ }
+ if (debug)
+ info("detected %d ports", port);
- /* 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, so default to 2 */
- usb->maxchild = 2;
- usb_init_root_hub(usb);
+ /* 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;
/*
- * Initialize the queues. They all start out empty,
- * linked to each other in the proper order.
+ * 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++) {
- dev->qh[i].link = 2 | virt_to_bus(&dev->skel_control_qh);
- dev->qh[i].element = 1;
+ for (i = 1; i < 9; i++) {
+ struct uhci_td *td = &uhci->skeltd[i];
+
+ uhci_fill_td(td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
+ td->link = virt_to_bus(&uhci->skeltd[i - 1]);
}
-
- dev->skel_control_qh.link = 2 | virt_to_bus(&dev->skel_bulk0_qh);
- dev->skel_control_qh.element = 1;
- dev->skel_bulk0_qh.link = 2 | virt_to_bus(&dev->skel_bulk1_qh);
- dev->skel_bulk0_qh.element = 1;
- dev->skel_bulk1_qh.link = 2 | virt_to_bus(&dev->skel_bulk2_qh);
- dev->skel_bulk1_qh.element = 1;
+ uhci_fill_td(&uhci->skel_int1_td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
+ uhci->skel_int1_td.link = virt_to_bus(&uhci->skel_ls_control_qh) | UHCI_PTR_QH;
- dev->skel_bulk2_qh.link = 2 | virt_to_bus(&dev->skel_bulk3_qh);
- dev->skel_bulk2_qh.element = 1;
+ uhci->skel_ls_control_qh.link = virt_to_bus(&uhci->skel_hs_control_qh) | UHCI_PTR_QH;
+ uhci->skel_ls_control_qh.element = UHCI_PTR_TERM;
- dev->skel_bulk3_qh.link = 1;
- dev->skel_bulk3_qh.element = 1;
+ uhci->skel_hs_control_qh.link = virt_to_bus(&uhci->skel_bulk_qh) | UHCI_PTR_QH;
+ uhci->skel_hs_control_qh.element = UHCI_PTR_TERM;
+
+ uhci->skel_bulk_qh.link = virt_to_bus(&uhci->skel_term_qh) | 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_PTR_TERM;
+
+ uhci->skel_term_qh.link = UHCI_PTR_TERM;
+ uhci->skel_term_qh.element = virt_to_bus(&uhci->skel_term_td);
/*
* Fill the frame list: make all entries point to
@@ -939,7 +2239,8 @@
* us a reasonable dynamic range for irq latencies.
*/
for (i = 0; i < 1024; i++) {
- struct uhci_qh * irq = &dev->skel_int2_qh;
+ struct uhci_td *irq = &uhci->skel_int1_td;
+
if (i & 1) {
irq++;
if (i & 2) {
@@ -952,21 +2253,31 @@
irq++;
if (i & 32) {
irq++;
- if (i & 64) {
+ if (i & 64)
irq++;
- }
}
}
}
}
}
}
- uhci->fl->frame[i] = 2 | virt_to_bus(irq);
+
+ /* Only place we don't use the frame list routines */
+ uhci->fl->frame[i] = virt_to_bus(irq);
}
return uhci;
-}
+/*
+ * error exits:
+ */
+au_free_fl:
+ free_page((unsigned long)uhci->fl);
+au_free_uhci:
+ kfree(uhci);
+
+ return NULL;
+}
/*
* De-allocate all resources..
@@ -978,236 +2289,260 @@
uhci->irq = -1;
}
-#if 0
- if (uhci->root_hub) {
- uhci_usb_deallocate(uhci_to_usb(uhci->root_hub));
- uhci->root_hub = NULL;
- }
-#endif
-
if (uhci->fl) {
free_page((unsigned long)uhci->fl);
uhci->fl = NULL;
}
- kfree(uhci->bus);
+ usb_free_bus(uhci->bus);
kfree(uhci);
}
-void cleanup_drivers(void);
-
-static int uhci_control_thread(void * __uhci)
+int uhci_start_root_hub(struct uhci *uhci)
{
- struct uhci *uhci = (struct uhci *)__uhci;
-
- lock_kernel();
- request_region(uhci->io_addr, 32, "usb-uhci");
+ struct usb_device *dev;
- /*
- * This thread doesn't need any user-level access,
- * so get rid of all our resources..
- */
- printk("uhci_control_thread at %p\n", &uhci_control_thread);
- exit_mm(current);
- exit_files(current);
- exit_fs(current);
+ dev = usb_alloc_dev(NULL, uhci->bus);
+ if (!dev)
+ return -1;
- strcpy(current->comm, "uhci-control");
+ uhci->bus->root_hub = dev;
+ usb_connect(dev);
- /*
- * Ok, all systems are go..
- */
- start_hc(uhci);
- for(;;) {
- siginfo_t info;
- int unsigned long signr;
-
- interruptible_sleep_on(&uhci_configure);
-#ifdef CONFIG_APM
- if (apm_resume) {
- apm_resume = 0;
- start_hc(uhci);
- continue;
- }
-#endif
- uhci_check_configuration(uhci);
+ if (usb_new_device(dev) != 0) {
+ usb_free_dev(dev);
- if(signal_pending(current)) {
- /* sending SIGUSR1 makes us print out some info */
- spin_lock_irq(¤t->sigmask_lock);
- signr = dequeue_signal(¤t->blocked, &info);
- spin_unlock_irq(¤t->sigmask_lock);
-
- if(signr == SIGUSR1) {
- printk("UHCI queue dump:\n");
- show_queues(uhci);
- } else {
- break;
- }
- }
+ return -1;
}
-#if 0
- if(uhci->root_hub)
- for(i = 0; i < uhci->root_hub->usb->maxchild; i++)
- usb_disconnect(uhci->root_hub->usb->children + i);
-#endif
-
- cleanup_drivers();
-
- reset_hc(uhci);
- release_region(uhci->io_addr, 32);
-
- release_uhci(uhci);
- MOD_DEC_USE_COUNT;
-
- printk("uhci_control_thread exiting\n");
-
return 0;
-}
+}
/*
* If we've successfully found a UHCI, now is the time to increment the
- * module usage count, start the control thread, and return success..
+ * module usage count, and return success..
*/
-static int found_uhci(int irq, unsigned int io_addr)
+static int setup_uhci(struct pci_dev *dev, int irq, unsigned int io_addr, unsigned int io_size)
{
int retval;
struct uhci *uhci;
+ char buf[8], *bufp = buf;
- uhci = alloc_uhci(io_addr);
+#ifndef __sparc__
+ sprintf(buf, "%d", irq);
+#else
+ bufp = __irq_itoa(irq);
+#endif
+ printk(KERN_INFO __FILE__ ": USB UHCI at I/O 0x%x, IRQ %s\n",
+ io_addr, bufp);
+
+ uhci = alloc_uhci(io_addr, io_size);
if (!uhci)
return -ENOMEM;
+ INIT_LIST_HEAD(&uhci->uhci_list);
+ list_add(&uhci->uhci_list, &uhci_list);
+
+ request_region(uhci->io_addr, io_size, "usb-uhci");
+
reset_hc(uhci);
- retval = -EBUSY;
- if (request_irq(irq, uhci_interrupt, SA_SHIRQ, "usb", uhci) == 0) {
- int pid;
+ usb_register_bus(uhci->bus);
+ start_hc(uhci);
- MOD_INC_USE_COUNT;
+ retval = -EBUSY;
+ if (request_irq(irq, uhci_interrupt, SA_SHIRQ, "usb-uhci", uhci) == 0) {
uhci->irq = irq;
- pid = kernel_thread(uhci_control_thread, uhci, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
- if (pid >= 0)
- return 0;
- MOD_DEC_USE_COUNT;
- retval = pid;
+ if (!uhci_start_root_hub(uhci)) {
+ struct pm_dev *pmdev;
+
+ pmdev = pm_register(PM_PCI_DEV,
+ PM_PCI_ID(dev),
+ handle_pm_event);
+ if (pmdev)
+ pmdev->data = uhci;
+ return 0;
+ }
}
+
+ /* Couldn't allocate IRQ if we got here */
+ list_del(&uhci->uhci_list);
+ INIT_LIST_HEAD(&uhci->uhci_list);
+
+ reset_hc(uhci);
+ release_region(uhci->io_addr, uhci->io_size);
release_uhci(uhci);
+
return retval;
}
-static int start_uhci(struct pci_dev *dev)
+static int found_uhci(struct pci_dev *dev)
{
int i;
+ /* disable legacy emulation */
+ pci_write_config_word(dev, USBLEGSUP, USBLEGSUP_DEFAULT);
+
+ if (pci_enable_device(dev) < 0)
+ return -1;
+
+ pci_set_master(dev);
+
+ if (!dev->irq) {
+ err("found UHCI device with no IRQ assigned. check BIOS settings!");
+ return -1;
+ }
+
/* Search for the IO base address.. */
for (i = 0; i < 6; i++) {
- unsigned int io_addr = dev->base_address[i];
+ unsigned int io_addr = pci_resource_start(dev, i);
+ unsigned int io_size = pci_resource_len(dev, i);
/* IO address? */
- if (!(io_addr & 1))
+ if (!(pci_resource_flags(dev, i) & IORESOURCE_IO))
continue;
- io_addr &= PCI_BASE_ADDRESS_IO_MASK;
-
/* Is it already in use? */
- if (check_region(io_addr, 32))
+ if (check_region(io_addr, io_size))
break;
- return found_uhci(dev->irq, io_addr);
+ return setup_uhci(dev, dev->irq, io_addr, io_size);
}
+
return -1;
}
-#ifdef CONFIG_APM
-static int handle_apm_event(apm_event_t event)
+static int handle_pm_event(struct pm_dev *dev, pm_request_t rqst, void *data)
{
- static int down = 0;
-
- switch (event) {
- case APM_SYS_SUSPEND:
- case APM_USER_SUSPEND:
- if (down) {
- printk(KERN_DEBUG "uhci: received extra suspend event\n");
- break;
- }
- down = 1;
+ struct uhci *uhci = dev->data;
+ switch (rqst) {
+ case PM_SUSPEND:
+ reset_hc(uhci);
break;
- case APM_NORMAL_RESUME:
- case APM_CRITICAL_RESUME:
- if (!down) {
- printk(KERN_DEBUG "uhci: received bogus resume event\n");
- break;
- }
- down = 0;
- if (waitqueue_active(&uhci_configure)) {
- apm_resume = 1;
- wake_up(&uhci_configure);
- }
+ case PM_RESUME:
+ reset_hc(uhci);
+ start_hc(uhci);
break;
}
return 0;
}
-#endif
-
-#ifdef MODULE
-void cleanup_module(void)
+static int __init uhci_init(void)
{
-#ifdef CONFIG_APM
- apm_unregister_callback(&handle_apm_event);
-#endif
-}
+ int retval;
+ struct pci_dev *dev;
+ u8 type;
-#define uhci_init init_module
+ retval = -ENOMEM;
-#endif
+ /* We throw all of the TD's and QH's into a kmem cache */
+ /* TD's and QH's need to be 16 byte aligned and SLAB_HWCACHE_ALIGN */
+ /* does this for us */
+ uhci_td_cachep = kmem_cache_create("uhci_td",
+ sizeof(struct uhci_td), 0,
+ SLAB_HWCACHE_ALIGN, NULL, NULL);
+
+ if (!uhci_td_cachep)
+ goto td_failed;
+
+ uhci_qh_cachep = kmem_cache_create("uhci_qh",
+ sizeof(struct uhci_qh), 0,
+ SLAB_HWCACHE_ALIGN, NULL, NULL);
-int uhci_init(void)
-{
- int retval;
- struct pci_dev *dev = NULL;
- u8 type;
+ if (!uhci_qh_cachep)
+ goto qh_failed;
+
+ 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 = -ENODEV;
+ dev = NULL;
for (;;) {
- dev = pci_find_class(PCI_CLASS_SERIAL_USB<<8, dev);
+ dev = pci_find_class(PCI_CLASS_SERIAL_USB << 8, dev);
if (!dev)
break;
- /* Is it UHCI */
+
+ /* Is it the UHCI programming interface? */
pci_read_config_byte(dev, PCI_CLASS_PROG, &type);
- if(type != 0)
+ if (type != 0)
continue;
+
/* Ok set it up */
- retval = start_uhci(dev);
- if (retval < 0)
- continue;
+ retval = found_uhci(dev);
+ }
-#ifdef CONFIG_USB_MOUSE
- usb_mouse_init();
-#endif
-#ifdef CONFIG_USB_KBD
- usb_kbd_init();
-#endif
- hub_init();
-#ifdef CONFIG_USB_AUDIO
- usb_audio_init();
-#endif
-#ifdef CONFIG_APM
- apm_register_callback(&handle_apm_event);
-#endif
+ /* We only want to return an error code if ther was an error */
+ /* and we didn't find a UHCI controller */
+ if (retval && list_empty(&uhci_list))
+ goto init_failed;
- return 0;
- }
+ 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:
+ if (kmem_cache_destroy(uhci_qh_cachep))
+ printk(KERN_INFO "uhci: not all QH's were freed\n");
+
+qh_failed:
+ if (kmem_cache_destroy(uhci_td_cachep))
+ printk(KERN_INFO "uhci: not all TD's were freed\n");
+
+td_failed:
return retval;
}
-void cleanup_drivers(void)
+void uhci_cleanup(void)
{
- hub_cleanup();
-#ifdef CONFIG_USB_MOUSE
- usb_mouse_cleanup();
-#endif
+ struct list_head *tmp, *head = &uhci_list;
+
+ tmp = head->next;
+ while (tmp != head) {
+ struct uhci *uhci = list_entry(tmp, struct uhci, uhci_list);
+
+ tmp = tmp->next;
+
+ list_del(&uhci->uhci_list);
+ INIT_LIST_HEAD(&uhci->uhci_list);
+
+ if (uhci->bus->root_hub)
+ usb_disconnect(&uhci->bus->root_hub);
+
+ usb_deregister_bus(uhci->bus);
+
+ reset_hc(uhci);
+ release_region(uhci->io_addr, uhci->io_size);
+
+ uhci_free_pending_qhs(uhci);
+
+ release_uhci(uhci);
+ }
+
+ if (kmem_cache_destroy(uhci_up_cachep))
+ printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
+
+ if (kmem_cache_destroy(uhci_qh_cachep))
+ printk(KERN_INFO "uhci: not all QH's were freed\n");
+
+ if (kmem_cache_destroy(uhci_td_cachep))
+ printk(KERN_INFO "uhci: not all TD's were freed\n");
+}
+
+static void __exit uhci_exit(void)
+{
+ pm_unregister_all(handle_pm_event);
+ uhci_cleanup();
}
+
+module_init(uhci_init);
+module_exit(uhci_exit);
+
+MODULE_AUTHOR("Linus Torvalds, Johannes Erdfelt, Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber");
+MODULE_DESCRIPTION("USB Universal Host Controller Interface driver");
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)