patch-2.4.20 linux-2.4.20/drivers/usb/hc_simple.c
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- Lines: 1073
- Date:
Thu Nov 28 15:53:14 2002
- Orig file:
linux-2.4.19/drivers/usb/hc_simple.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/drivers/usb/hc_simple.c linux-2.4.20/drivers/usb/hc_simple.c
@@ -0,0 +1,1072 @@
+/*-------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------*
+ * 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)