patch-2.4.23 linux-2.4.23/drivers/usb/hc_simple.c

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diff -urN linux-2.4.22/drivers/usb/hc_simple.c linux-2.4.23/drivers/usb/hc_simple.c
@@ -1,1072 +0,0 @@
-/*-------------------------------------------------------------------------*/
-/*-------------------------------------------------------------------------*
- * simple generic USB HCD frontend Version 0.9.5 (10/28/2001)
- * for embedded HCs (SL811HS)
- * 
- * USB URB handling, hci_ hcs_
- * URB queueing, qu_
- * Transfer scheduling, sh_
- * 
- *
- *-------------------------------------------------------------------------*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- *-------------------------------------------------------------------------*/
-
-/* main lock for urb access */
-static spinlock_t usb_urb_lock = SPIN_LOCK_UNLOCKED;
-
-/*-------------------------------------------------------------------------*/
-/*-------------------------------------------------------------------------*/
-/* URB HCD API function layer
- * * * */
-
-/***************************************************************************
- * Function Name : hcs_urb_queue
- *
- * This function initializes the urb status and length before queueing the 
- * urb. 
- *
- * Input:  hci = data structure for the host controller
- *         urb = USB request block data structure 
- *
- * Return: 0 
- **************************************************************************/
-static inline int hcs_urb_queue (hci_t * hci, struct urb * urb)
-{
-	int i;
-
-	DBGFUNC ("enter hcs_urb_queue\n");
-	if (usb_pipeisoc (urb->pipe)) {
-		DBGVERBOSE ("hcs_urb_queue: isoc pipe\n");
-		for (i = 0; i < urb->number_of_packets; i++) {
-			urb->iso_frame_desc[i].actual_length = 0;
-			urb->iso_frame_desc[i].status = -EXDEV;
-		}
-
-		/* urb->next hack : 1 .. resub, 0 .. single shot */
-		/* urb->interval = urb->next ? 1 : 0; */
-	}
-
-	urb->status = -EINPROGRESS;
-	urb->actual_length = 0;
-	urb->error_count = 0;
-
-	if (usb_pipecontrol (urb->pipe))
-		hc_flush_data_cache (hci, urb->setup_packet, 8);
-	if (usb_pipeout (urb->pipe))
-		hc_flush_data_cache (hci, urb->transfer_buffer,
-				     urb->transfer_buffer_length);
-
-	qu_queue_urb (hci, urb);
-
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : hcs_return_urb
- *
- * This function the return path of URB back to the USB core. It calls the
- * the urb complete function if exist, and also handles the resubmition of
- * interrupt URBs.
- *
- * Input:  hci = data structure for the host controller
- *         urb = USB request block data structure 
- *         resub_ok = resubmit flag: 1 = submit urb again, 0 = not submit 
- *
- * Return: 0 
- **************************************************************************/
-static int hcs_return_urb (hci_t * hci, struct urb * urb, int resub_ok)
-{
-	struct usb_device *dev = urb->dev;
-	int resubmit = 0;
-
-	DBGFUNC ("enter hcs_return_urb, urb pointer = 0x%x, "
-		 "transferbuffer point = 0x%x, "
-		 " setup packet pointer = 0x%x, context pointer = 0x%x \n",
-		 (__u32 *) urb, (__u32 *) urb->transfer_buffer,
-		 (__u32 *) urb->setup_packet, (__u32 *) urb->context);
-	if (urb_debug)
-		urb_print (urb, "RET", usb_pipeout (urb->pipe));
-
-	resubmit = urb->interval && resub_ok;
-
-	urb->dev = urb->hcpriv = NULL;
-
-	if (urb->complete) {
-		urb->complete (urb);	/* call complete */
-	}
-
-	if (resubmit) {
-		/* requeue the URB */
-		urb->dev = dev;
-		hcs_urb_queue (hci, urb);
-	}
-
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : hci_submit_urb
- *
- * This function is called by the USB core API when an URB is available to
- * process.  This function does the following
- *
- * 1) Check the validity of the URB
- * 2) Parse the device number from the URB
- * 3) Pass the URB to the root hub routine if its intended for the hub, else
- *    queue the urb for the attached device. 
- *
- * Input: urb = USB request block data structure 
- *
- * Return: 0 if success or error code 
- **************************************************************************/
-static int hci_submit_urb (struct urb * urb)
-{
-	hci_t *hci;
-	unsigned int pipe = urb->pipe;
-	unsigned long flags;
-	int ret;
-
-	DBGFUNC ("enter hci_submit_urb, pipe = 0x%x\n", urb->pipe);
-	if (!urb->dev || !urb->dev->bus || urb->hcpriv)
-		return -EINVAL;
-
-	if (usb_endpoint_halted
-	    (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe))) {
-		printk ("hci_submit_urb: endpoint_halted\n");
-		return -EPIPE;
-	}
-	hci = (hci_t *) urb->dev->bus->hcpriv;
-
-	/* a request to the virtual root hub */
-
-	if (usb_pipedevice (pipe) == hci->rh.devnum) {
-		if (urb_debug > 1)
-			urb_print (urb, "SUB-RH", usb_pipein (pipe));
-
-		return rh_submit_urb (urb);
-	}
-
-	/* queue the URB to its endpoint-queue */
-
-	spin_lock_irqsave (&usb_urb_lock, flags);
-	ret = hcs_urb_queue (hci, urb);
-	if (ret != 0) {
-		/* error on return */
-		DBGERR
-		    ("hci_submit_urb: return err, ret = 0x%x, urb->status = 0x%x\n",
-		     ret, urb->status);
-	}
-
-	spin_unlock_irqrestore (&usb_urb_lock, flags);
-
-	return ret;
-
-}
-
-/***************************************************************************
- * Function Name : hci_unlink_urb
- *
- * This function mark the URB to unlink
- *
- * Input: urb = USB request block data structure 
- *
- * Return: 0 if success or error code 
- **************************************************************************/
-static int hci_unlink_urb (struct urb * urb)
-{
-	unsigned long flags;
-	hci_t *hci;
-	DECLARE_WAITQUEUE (wait, current);
-	void *comp = NULL;
-
-	DBGFUNC ("enter hci_unlink_urb\n");
-
-	if (!urb)		/* just to be sure */
-		return -EINVAL;
-
-	if (!urb->dev || !urb->dev->bus)
-		return -ENODEV;
-
-	hci = (hci_t *) urb->dev->bus->hcpriv;
-
-	/* a request to the virtual root hub */
-	if (usb_pipedevice (urb->pipe) == hci->rh.devnum) {
-		return rh_unlink_urb (urb);
-	}
-
-	if (urb_debug)
-		urb_print (urb, "UNLINK", 1);
-
-	spin_lock_irqsave (&usb_urb_lock, flags);
-
-	if (!list_empty (&urb->urb_list) && urb->status == -EINPROGRESS) {
-		/* URB active? */
-
-		if (urb->
-		    transfer_flags & (USB_ASYNC_UNLINK | USB_TIMEOUT_KILLED)) {
-			/* asynchron with callback */
-
-			list_del (&urb->urb_list);	/* relink the urb to the del list */
-			list_add (&urb->urb_list, &hci->del_list);
-			spin_unlock_irqrestore (&usb_urb_lock, flags);
-
-		} else {
-			/* synchron without callback */
-
-			add_wait_queue (&hci->waitq, &wait);
-
-			set_current_state (TASK_UNINTERRUPTIBLE);
-			comp = urb->complete;
-			urb->complete = NULL;
-
-			list_del (&urb->urb_list);	/* relink the urb to the del list */
-			list_add (&urb->urb_list, &hci->del_list);
-
-			spin_unlock_irqrestore (&usb_urb_lock, flags);
-
-			schedule_timeout (HZ / 50);
-
-			if (!list_empty (&urb->urb_list))
-				list_del (&urb->urb_list);
-
-			urb->complete = comp;
-			urb->hcpriv = NULL;
-			remove_wait_queue (&hci->waitq, &wait);
-		}
-	} else {
-		/* hcd does not own URB but we keep the driver happy anyway */
-		spin_unlock_irqrestore (&usb_urb_lock, flags);
-
-		if (urb->complete && (urb->transfer_flags & USB_ASYNC_UNLINK)) {
-			urb->status = -ENOENT;
-			urb->actual_length = 0;
-			urb->complete (urb);
-			urb->status = 0;
-		} else {
-			urb->status = -ENOENT;
-		}
-	}
-
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : hci_alloc_dev
- *
- * This function allocates private data space for the usb device and 
- * initialize the endpoint descriptor heads.
- *
- * Input: usb_dev = pointer to the usb device 
- *
- * Return: 0 if success or error code 
- **************************************************************************/
-static int hci_alloc_dev (struct usb_device *usb_dev)
-{
-	struct hci_device *dev;
-	int i;
-
-	DBGFUNC ("enter hci_alloc_dev\n");
-	dev = kmalloc (sizeof (*dev), GFP_KERNEL);
-	if (!dev)
-		return -ENOMEM;
-
-	memset (dev, 0, sizeof (*dev));
-
-	for (i = 0; i < 32; i++) {
-		INIT_LIST_HEAD (&(dev->ed[i].urb_queue));
-		dev->ed[i].pipe_head = NULL;
-	}
-
-	usb_dev->hcpriv = dev;
-
-	DBGVERBOSE ("USB HC dev alloc %d bytes\n", sizeof (*dev));
-
-	return 0;
-
-}
-
-/***************************************************************************
- * Function Name : hci_free_dev
- *
- * This function de-allocates private data space for the usb devic
- *
- * Input: usb_dev = pointer to the usb device 
- *
- * Return: 0  
- **************************************************************************/
-static int hci_free_dev (struct usb_device *usb_dev)
-{
-	DBGFUNC ("enter hci_free_dev\n");
-
-	if (usb_dev->hcpriv)
-		kfree (usb_dev->hcpriv);
-
-	usb_dev->hcpriv = NULL;
-
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : hci_get_current_frame_number
- *
- * This function get the current USB frame number
- *
- * Input: usb_dev = pointer to the usb device 
- *
- * Return: frame number  
- **************************************************************************/
-static int hci_get_current_frame_number (struct usb_device *usb_dev)
-{
-	hci_t *hci = usb_dev->bus->hcpriv;
-	DBGFUNC ("enter hci_get_current_frame_number, frame = 0x%x \r\n",
-		 hci->frame_number);
-
-	return (hci->frame_number);
-}
-
-/***************************************************************************
- * List of all io-functions 
- **************************************************************************/
-
-static struct usb_operations hci_device_operations = {
-	allocate:		hci_alloc_dev,
-	deallocate:		hci_free_dev,
-	get_frame_number:	hci_get_current_frame_number,
-	submit_urb:		hci_submit_urb,
-	unlink_urb:		hci_unlink_urb,
-};
-
-/***************************************************************************
- * URB queueing:
- * 
- * For each type of transfer (INTR, BULK, ISO, CTRL) there is a list of 
- * active URBs.
- * (hci->intr_list, hci->bulk_list, hci->iso_list, hci->ctrl_list)
- * For every endpoint the head URB of the queued URBs is linked to one of 
- * those lists.
- * 
- * The rest of the queued URBs of an endpoint are linked into a 
- * private URB list for each endpoint. (hci_dev->ed [endpoint_io].urb_queue)
- * hci_dev->ed [endpoint_io].pipe_head .. points to the head URB which is 
- * in one of the active URB lists.
- * 
- * The index of an endpoint consists of its number and its direction.
- * 
- * The state of an intr and iso URB is 0. 
- * For ctrl URBs the states are US_CTRL_SETUP, US_CTRL_DATA, US_CTRL_ACK
- * Bulk URBs states are US_BULK and US_BULK0 (with 0-len packet)
- * 
- **************************************************************************/
-
-/***************************************************************************
- * Function Name : qu_urb_timeout
- *
- * This function is called when the URB timeout. The function unlinks the 
- * URB. 
- *
- * Input: lurb: URB 
- *
- * Return: none  
- **************************************************************************/
-#ifdef HC_URB_TIMEOUT
-static void qu_urb_timeout (unsigned long lurb)
-{
-	struct urb *urb = (struct urb *) lurb;
-
-	DBGFUNC ("enter qu_urb_timeout\n");
-	urb->transfer_flags |= USB_TIMEOUT_KILLED;
-	hci_unlink_urb (urb);
-}
-#endif
-
-/***************************************************************************
- * Function Name : qu_pipeindex
- *
- * This function gets the index of the pipe.   
- *
- * Input: pipe: the urb pipe 
- *
- * Return: index  
- **************************************************************************/
-static inline int qu_pipeindex (__u32 pipe)
-{
-	DBGFUNC ("enter qu_pipeindex\n");
-	return (usb_pipeendpoint (pipe) << 1) | (usb_pipecontrol (pipe) ? 0 : usb_pipeout (pipe));
-}
-
-/***************************************************************************
- * Function Name : qu_seturbstate
- *
- * This function set the state of the URB.  
- * 
- * control pipe: 3 states -- Setup, data, status
- * interrupt and bulk pipe: 1 state -- data    
- *
- * Input: urb = USB request block data structure 
- *        state = the urb state
- *
- * Return: none  
- **************************************************************************/
-static inline void qu_seturbstate (struct urb * urb, int state)
-{
-	DBGFUNC ("enter qu_seturbstate\n");
-	urb->pipe &= ~0x1f;
-	urb->pipe |= state & 0x1f;
-}
-
-/***************************************************************************
- * Function Name : qu_urbstate
- *
- * This function get the current state of the URB.  
- * 
- * Input: urb = USB request block data structure 
- *
- * Return: none  
- **************************************************************************/
-static inline int qu_urbstate (struct urb * urb)
-{
-
-	DBGFUNC ("enter qu_urbstate\n");
-
-	return urb->pipe & 0x1f;
-}
-
-/***************************************************************************
- * Function Name : qu_queue_active_urb
- *
- * This function adds the urb to the appropriate active urb list and set
- * the urb state.
- * 
- * There are four active lists: isochoronous list, interrupt list, 
- * control list, and bulk list.
- * 
- * Input: hci = data structure for the host controller 
- *        urb = USB request block data structure 
- *        ed = endpoint descriptor
- *
- * Return: none  
- **************************************************************************/
-static inline void qu_queue_active_urb (hci_t * hci, struct urb * urb, epd_t * ed)
-{
-	int urb_state = 0;
-	DBGFUNC ("enter qu_queue_active_urb\n");
-	switch (usb_pipetype (urb->pipe)) {
-	case PIPE_CONTROL:
-		list_add (&urb->urb_list, &hci->ctrl_list);
-		urb_state = US_CTRL_SETUP;
-		break;
-
-	case PIPE_BULK:
-		list_add (&urb->urb_list, &hci->bulk_list);
-		if ((urb->transfer_flags & USB_ZERO_PACKET)
-		    && urb->transfer_buffer_length > 0
-		    &&
-		    ((urb->transfer_buffer_length %
-		      usb_maxpacket (urb->dev, urb->pipe,
-				     usb_pipeout (urb->pipe))) == 0)) {
-			urb_state = US_BULK0;
-		}
-		break;
-
-	case PIPE_INTERRUPT:
-		urb->start_frame = hci->frame_number;
-		list_add (&urb->urb_list, &hci->intr_list);
-		break;
-
-	case PIPE_ISOCHRONOUS:
-		list_add (&urb->urb_list, &hci->iso_list);
-		break;
-	}
-
-#ifdef HC_URB_TIMEOUT
-	if (urb->timeout) {
-		ed->timeout.data = (unsigned long) urb;
-		ed->timeout.expires = urb->timeout + jiffies;
-		ed->timeout.function = qu_urb_timeout;
-		add_timer (&ed->timeout);
-	}
-#endif
-
-	qu_seturbstate (urb, urb_state);
-}
-
-/***************************************************************************
- * Function Name : qu_queue_urb
- *
- * This function adds the urb to the endpoint descriptor list 
- * 
- * Input: hci = data structure for the host controller 
- *        urb = USB request block data structure 
- *
- * Return: none  
- **************************************************************************/
-static int qu_queue_urb (hci_t * hci, struct urb * urb)
-{
-	struct hci_device *hci_dev = usb_to_hci (urb->dev);
-	epd_t *ed = &hci_dev->ed[qu_pipeindex (urb->pipe)];
-
-	DBGFUNC ("Enter qu_queue_urb\n");
-
-	/* for ISOC transfers calculate start frame index */
-
-	if (usb_pipeisoc (urb->pipe) && urb->transfer_flags & USB_ISO_ASAP) {
-		urb->start_frame = ((ed->pipe_head) ? (ed->last_iso + 1) : hci_get_current_frame_number (urb-> dev) + 1) & 0xffff;
-	}
-
-	if (ed->pipe_head) {
-		__list_add (&urb->urb_list, ed->urb_queue.prev,
-			    &(ed->urb_queue));
-	} else {
-		ed->pipe_head = urb;
-		qu_queue_active_urb (hci, urb, ed);
-		if (++hci->active_urbs == 1)
-			hc_start_int (hci);
-	}
-
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : qu_next_urb
- *
- * This function removes the URB from the queue and add the next URB to 
- * active list. 
- * 
- * Input: hci = data structure for the host controller 
- *        urb = USB request block data structure 
- *        resub_ok = resubmit flag
- *
- * Return: pointer to the next urb  
- **************************************************************************/
-static struct urb *qu_next_urb (hci_t * hci, struct urb * urb, int resub_ok)
-{
-	struct hci_device *hci_dev = usb_to_hci (urb->dev);
-	epd_t *ed = &hci_dev->ed[qu_pipeindex (urb->pipe)];
-
-	DBGFUNC ("enter qu_next_urb\n");
-	list_del (&urb->urb_list);
-	INIT_LIST_HEAD (&urb->urb_list);
-	if (ed->pipe_head == urb) {
-
-#ifdef HC_URB_TIMEOUT
-		if (urb->timeout)
-			del_timer (&ed->timeout);
-#endif
-
-		if (!--hci->active_urbs)
-			hc_stop_int (hci);
-
-		if (!list_empty (&ed->urb_queue)) {
-			urb = list_entry (ed->urb_queue.next, struct urb, urb_list);
-			list_del (&urb->urb_list);
-			INIT_LIST_HEAD (&urb->urb_list);
-			ed->pipe_head = urb;
-			qu_queue_active_urb (hci, urb, ed);
-		} else {
-			ed->pipe_head = NULL;
-			urb = NULL;
-		}
-	}
-	return urb;
-}
-
-/***************************************************************************
- * Function Name : qu_return_urb
- *
- * This function is part of the return path.   
- * 
- * Input: hci = data structure for the host controller 
- *        urb = USB request block data structure 
- *        resub_ok = resubmit flag
- *
- * Return: pointer to the next urb  
- **************************************************************************/
-static struct urb *qu_return_urb (hci_t * hci, struct urb * urb, int resub_ok)
-{
-	struct urb *next_urb;
-
-	DBGFUNC ("enter qu_return_rub\n");
-	next_urb = qu_next_urb (hci, urb, resub_ok);
-	hcs_return_urb (hci, urb, resub_ok);
-	return next_urb;
-}
-
-/***************************************************************************
- * Function Name : sh_scan_iso_urb_list
- *
- * This function goes throught the isochronous urb list and schedule the 
- * the transfer.   
- *
- * Note: This function has not tested yet
- * 
- * Input: hci = data structure for the host controller 
- *        list_lh = pointer to the isochronous list 
- *        frame_number = the frame number 
- *
- * Return: 0 = unsuccessful; 1 = successful  
- **************************************************************************/
-static int sh_scan_iso_urb_list (hci_t * hci, struct list_head *list_lh,
-				 int frame_number)
-{
-	struct list_head *lh = list_lh->next;
-	struct urb *urb;
-
-	DBGFUNC ("enter sh_scan_iso_urb_list\n");
-	hci->td_array->len = 0;
-
-	while (lh != list_lh) {
-		urb = list_entry (lh, struct urb, urb_list);
-		lh = lh->next;
-		if (((frame_number - urb->start_frame) & 0x7ff) <
-		    urb->number_of_packets) {
-			if (!sh_add_packet (hci, urb)) {
-				return 0;
-			} else {
-				if (((frame_number -
-				      urb->start_frame) & 0x7ff) > 0x400) {
-					if (qu_urbstate (urb) > 0)
-						urb = qu_return_urb (hci, urb, 1);
-					else
-						urb = qu_next_urb (hci, urb, 1);
-
-					if (lh == list_lh && urb)
-						lh = &urb->urb_list;
-				}
-			}
-		}
-	}
-	return 1;
-}
-
-/***************************************************************************
- * Function Name : sh_scan_urb_list
- *
- * This function goes through the urb list and schedule the 
- * the transaction.   
- * 
- * Input: hci = data structure for the host controller 
- *        list_lh = pointer to the isochronous list 
- *
- * Return: 0 = unsuccessful; 1 = successful  
- **************************************************************************/
-static int sh_scan_urb_list (hci_t * hci, struct list_head *list_lh)
-{
-	struct list_head *lh = NULL;
-	struct urb *urb;
-
-	if (list_lh == NULL) {
-		DBGERR ("sh_scan_urb_list: error, list_lh == NULL\n");
-	}
-
-	DBGFUNC ("enter sh_scan_urb_list: frame# \n");
-
-	list_for_each (lh, list_lh) {
-		urb = list_entry (lh, struct urb, urb_list);
-		if (urb == NULL)
-			return 1;
-		if (!usb_pipeint (urb->pipe)
-		    || (((hci->frame_number - urb->start_frame)
-			 & 0x7ff) >= urb->interval)) {
-			DBGVERBOSE ("sh_scan_urb_list !INT: %d fr_no: %d int: %d pint: %d\n",
-				    urb->start_frame, hci->frame_number, urb->interval,
-				    usb_pipeint (urb->pipe));
-			if (!sh_add_packet (hci, urb)) {
-				return 0;
-			} else {
-				DBGVERBOSE ("INT: start: %d fr_no: %d int: %d pint: %d\n",
-					    urb->start_frame, hci->frame_number,
-					    urb->interval, usb_pipeint (urb->pipe));
-				urb->start_frame = hci->frame_number;
-				return 0;
-
-			}
-		}
-	}
-	return 1;
-}
-
-/***************************************************************************
- * Function Name : sh_shedule_trans
- *
- * This function schedule the USB transaction.
- * This function will process the endpoint in the following order: 
- * interrupt, control, and bulk.    
- * 
- * Input: hci = data structure for the host controller 
- *        isSOF = flag indicate if Start Of Frame has occurred 
- *
- * Return: 0   
- **************************************************************************/
-static int sh_schedule_trans (hci_t * hci, int isSOF)
-{
-	int units_left = 1;
-	struct list_head *lh;
-
-	if (hci == NULL) {
-		DBGERR ("sh_schedule_trans: hci == NULL\n");
-		return 0;
-	}
-	if (hci->td_array == NULL) {
-		DBGERR ("sh_schedule_trans: hci->td_array == NULL\n");
-		return 0;
-	}
-
-	if (hci->td_array->len != 0) {
-		DBGERR ("ERROR: schedule, hci->td_array->len = 0x%x, s/b: 0\n",
-			hci->td_array->len);
-	}
-
-	/* schedule the next available interrupt transfer or the next
-	 * stage of the interrupt transfer */
-
-	if (hci->td_array->len == 0 && !list_empty (&hci->intr_list)) {
-		units_left = sh_scan_urb_list (hci, &hci->intr_list);
-	}
-
-	/* schedule the next available control transfer or the next
-	 * stage of the control transfer */
-
-	if (hci->td_array->len == 0 && !list_empty (&hci->ctrl_list) && units_left > 0) {
-		units_left = sh_scan_urb_list (hci, &hci->ctrl_list);
-	}
-
-	/* schedule the next available bulk transfer or the next
-	 * stage of the bulk transfer */
-
-	if (hci->td_array->len == 0 && !list_empty (&hci->bulk_list) && units_left > 0) {
-		sh_scan_urb_list (hci, &hci->bulk_list);
-
-		/* be fair to each BULK URB (move list head around) 
-		 * only when the new SOF happens */
-
-		lh = hci->bulk_list.next;
-		list_del (&hci->bulk_list);
-		list_add (&hci->bulk_list, lh);
-	}
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : sh_add_packet
- *
- * This function forms the packet and transmit the packet. This function
- * will handle all endpoint type: isochoronus, interrupt, control, and 
- * bulk.
- * 
- * Input: hci = data structure for the host controller 
- *        urb = USB request block data structure 
- *
- * Return: 0 = unsucessful; 1 = successful   
- **************************************************************************/
-static int sh_add_packet (hci_t * hci, struct urb * urb)
-{
-	__u8 *data = NULL;
-	int len = 0;
-	int toggle = 0;
-	int maxps = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
-	int endpoint = usb_pipeendpoint (urb->pipe);
-	int address = usb_pipedevice (urb->pipe);
-	int slow = (((urb->pipe) >> 26) & 1);
-	int out = usb_pipeout (urb->pipe);
-	int pid = 0;
-	int ret;
-	int i = 0;
-	int iso = 0;
-
-	DBGFUNC ("enter sh_add_packet\n");
-	if (maxps == 0)
-		maxps = 8;
-
-	/* calculate len, toggle bit and add the transaction */
-	switch (usb_pipetype (urb->pipe)) {
-	case PIPE_ISOCHRONOUS:
-		pid = out ? PID_OUT : PID_IN;
-		iso = 1;
-		i = hci->frame_number - urb->start_frame;
-		data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
-		len = urb->iso_frame_desc[i].length;
-		break;
-
-	case PIPE_BULK:	/* BULK and BULK0 */
-	case PIPE_INTERRUPT:
-		pid = out ? PID_OUT : PID_IN;
-		len = urb->transfer_buffer_length - urb->actual_length;
-		data = urb->transfer_buffer + urb->actual_length;
-		toggle = usb_gettoggle (urb->dev, endpoint, out);
-		break;
-
-	case PIPE_CONTROL:
-		switch (qu_urbstate (urb)) {
-		case US_CTRL_SETUP:
-			len = 8;
-			pid = PID_SETUP;
-			data = urb->setup_packet;
-			toggle = 0;
-			break;
-
-		case US_CTRL_DATA:
-			if (!hci->last_packet_nak) {
-				/* The last packet received is not a nak:
-				 * reset the nak count
-				 */
-
-				hci->nakCnt = 0;
-			}
-			if (urb->transfer_buffer_length != 0) {
-				pid = out ? PID_OUT : PID_IN;
-				len = urb->transfer_buffer_length - urb->actual_length;
-				data = urb->transfer_buffer + urb->actual_length;
-				toggle = (urb->actual_length & maxps) ? 0 : 1;
-				usb_settoggle (urb->dev,
-					       usb_pipeendpoint (urb->pipe),
-					       usb_pipeout (urb->pipe), toggle);
-				break;
-			} else {
-				/* correct state and fall through */
-				qu_seturbstate (urb, US_CTRL_ACK);
-			}
-
-		case US_CTRL_ACK:
-			len = 0;
-
-			/* reply in opposite direction */
-			pid = !out ? PID_OUT : PID_IN;
-			toggle = 1;
-			usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe),
-				       usb_pipeout (urb->pipe), toggle);
-			break;
-		}
-	}
-
-	ret =
-	    hc_add_trans (hci, len, data, toggle, maxps, slow, endpoint,
-			  address, pid, iso, qu_urbstate (urb));
-
-	DBGVERBOSE ("transfer_pa: addr:%d ep:%d pid:%x tog:%x iso:%x sl:%x "
-		    "max:%d\n len:%d ret:%d data:%p left:%d\n",
-		    address, endpoint, pid, toggle, iso, slow,
-		    maxps, len, ret, data, hci->hp.units_left);
-
-	if (ret >= 0) {
-		hci->td_array->td[hci->td_array->len].urb = urb;
-		hci->td_array->td[hci->td_array->len].len = ret;
-		hci->td_array->td[hci->td_array->len].iso_index = i;
-		hci->td_array->len++;
-		hci->active_trans = 1;
-		return 1;
-	}
-	return 0;
-}
-
-/***************************************************************************
- * Function Name : cc_to_error
- *
- * This function maps the SL811HS hardware error code to the linux USB error
- * code.
- * 
- * Input: cc = hardware error code 
- *
- * Return: USB error code   
- **************************************************************************/
-static int cc_to_error (int cc)
-{
-	int errCode = 0;
-	if (cc & SL11H_STATMASK_ERROR) {
-		errCode |= -EILSEQ;
-	} else if (cc & SL11H_STATMASK_OVF) {
-		errCode |= -EOVERFLOW;
-	} else if (cc & SL11H_STATMASK_STALL) {
-		errCode |= -EPIPE;
-	}
-	return errCode;
-}
-
-/***************************************************************************
- * Function Name : sh_done_list
- *
- * This function process the packet when it has done finish transfer.
- * 
- * 1) It handles hardware error
- * 2) It updates the URB state
- * 3) If the USB transaction is complete, it start the return stack path.
- * 
- * Input: hci = data structure for the host controller 
- *        isExcessNak = flag tells if there excess NAK condition occurred 
- *
- * Return:  urb_state or -1 if the transaction has complete   
- **************************************************************************/
-static int sh_done_list (hci_t * hci, int *isExcessNak)
-{
-	int actbytes = 0;
-	int active = 0;
-	void *data = NULL;
-	int cc;
-	int maxps;
-	int toggle;
-	struct urb *urb;
-	int urb_state = 0;
-	int ret = 1;		/* -1 parse abbort, 1 parse ok, 0 last element */
-	int trans = 0;
-	int len;
-	int iso_index = 0;
-	int out;
-	int pid = 0;
-	int debugLen = 0;
-
-	*isExcessNak = 0;
-
-	DBGFUNC ("enter sh_done_list: td_array->len = 0x%x\n",
-		 hci->td_array->len);
-
-	debugLen = hci->td_array->len;
-	if (debugLen > 1)
-		DBGERR ("sh_done_list: td_array->len = 0x%x > 1\n",
-			hci->td_array->len);
-
-	for (trans = 0; ret && trans < hci->td_array->len && trans < MAX_TRANS;
-	     trans++) {
-		urb = hci->td_array->td[trans].urb;
-		len = hci->td_array->td[trans].len;
-		out = usb_pipeout (urb->pipe);
-
-		if (usb_pipeisoc (urb->pipe)) {
-			iso_index = hci->td_array->td[trans].iso_index;
-			data = urb->transfer_buffer + urb->iso_frame_desc[iso_index].offset;
-			toggle = 0;
-		} else {
-			data = urb->transfer_buffer + urb->actual_length;
-			toggle = usb_gettoggle (urb->dev,
-						usb_pipeendpoint (urb->pipe),
-						usb_pipeout (urb->pipe));
-
-		}
-		urb_state = qu_urbstate (urb);
-		pid = out ? PID_OUT : PID_IN;
-		ret = hc_parse_trans (hci, &actbytes, data, &cc, &toggle, len,
-				      pid, urb_state);
-		maxps = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
-
-		if (maxps == 0)
-			maxps = 8;
-
-		active = (urb_state != US_CTRL_SETUP) && (actbytes && !(actbytes & (maxps - 1)));
-
-		/* If the transfer is not bulk in, then it is necessary to get all
-		 * data specify by the urb->transfer_len.
-		 */
-
-		if (!(usb_pipebulk (urb->pipe) && usb_pipein (urb->pipe)))
-			active = active && (urb->transfer_buffer_length != urb->actual_length + actbytes);
-
-		if (urb->transfer_buffer_length == urb->actual_length + actbytes)
-			active = 0;
-
-		if ((cc &
-		     (SL11H_STATMASK_ERROR | SL11H_STATMASK_TMOUT |
-		      SL11H_STATMASK_OVF | SL11H_STATMASK_STALL))
-		    && !(cc & SL11H_STATMASK_NAK)) {
-			if (++urb->error_count > 3) {
-				DBGERR ("done_list: excessive error: errcount = 0x%x, cc = 0x%x\n",
-					urb->error_count, cc);
-				urb_state = 0;
-				active = 0;
-			} else {
-				DBGERR ("done_list: packet err, cc = 0x%x, "
-					" urb->length = 0x%x, actual_len = 0x%x,"
-					" urb_state =0x%x\n",
-					cc, urb->transfer_buffer_length,
-					urb->actual_length, urb_state);
-//			if (cc & SL11H_STATMASK_STALL) {
-				/* The USB function is STALLED on a control pipe (0), 
-				 * then it needs to send the SETUP command again to 
-				 * clear the STALL condition
-				 */
-
-//				if (usb_pipeendpoint (urb->pipe) == 0) {
-//					urb_state = 2;  
-//					active = 0;
-//				}
-//			} else   
-				active = 1;
-			}
-		} else {
-			if (cc & SL11H_STATMASK_NAK) {
-				if (hci->nakCnt < 0x10000) {
-					hci->nakCnt++;
-					hci->last_packet_nak = 1;
-					active = 1;
-					*isExcessNak = 0;
-				} else {
-					DBGERR ("done_list: nak count exceed limit\n");
-					active = 0;
-					*isExcessNak = 1;
-					hci->nakCnt = 0;
-				}
-			} else {
-				hci->nakCnt = 0;
-				hci->last_packet_nak = 0;
-			}
-
-			if (urb_state != US_CTRL_SETUP) {
-				/* no error */
-				urb->actual_length += actbytes;
-				usb_settoggle (urb->dev,
-					       usb_pipeendpoint (urb->pipe),
-					       usb_pipeout (urb->pipe), toggle);
-			}
-			if (usb_pipeisoc (urb->pipe)) {
-				urb->iso_frame_desc[iso_index].actual_length = actbytes;
-				urb->iso_frame_desc[iso_index].status = cc_to_error (cc);
-				active = (iso_index < urb->number_of_packets);
-			}
-		}
-		if (!active) {
-			if (!urb_state) {
-				urb->status = cc_to_error (cc);
-				if (urb->status) {
-					DBGERR ("error on received packet: urb->status = 0x%x\n",
-						urb->status);
-				}
-				hci->td_array->len = 0;
-				qu_return_urb (hci, urb, 1);
-				return -1;
-			} else {
-				/* We do not want to decrement the urb_state if exceeded nak,
-				 * because we need to finish the data stage of the control 
-				 * packet 
-				 */
-
-				if (!(*isExcessNak))
-					urb_state--;
-				qu_seturbstate (urb, urb_state);
-			}
-		}
-	}
-
-	if (urb_state < 0)
-		DBGERR ("ERROR: done_list, urb_state = %d, suppose > 0\n",
-			urb_state);
-	if (debugLen != hci->td_array->len) {
-		DBGERR ("ERROR: done_list, debugLen!= td_array->len,"
-			"debugLen = 0x%x, hci->td_array->len = 0x%x\n",
-			debugLen, hci->td_array->len);
-	}
-
-	hci->td_array->len = 0;
-
-	return urb_state;
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)