/**
* Schedules an interrupt or isochronous transfer in the periodic schedule.
*
* @param hcd The HCD state structure for the DWC OTG controller.
* @param qh QH for the periodic transfer. The QH should already contain the
* scheduling information.
*
* @return 0 if successful, negative error code otherwise.
*/
static int schedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
int status = 0;
status = periodic_channel_available(hcd);
if (status) {
DWC_NOTICE("%s: No host channel available for periodic "
"transfer.\n", __func__);
return status;
}
status = check_periodic_bandwidth(hcd, qh);
if (status) {
DWC_NOTICE("%s: Insufficient periodic bandwidth for "
"periodic transfer.\n", __func__);
return status;
}
status = check_max_xfer_size(hcd, qh);
if (status) {
DWC_NOTICE("%s: Channel max transfer size too small "
"for periodic transfer.\n", __func__);
return status;
}
/* Always start in the inactive schedule. */
list_add_tail(&qh->qh_list_entry, &hcd->periodic_sched_inactive);
/* Reserve the periodic channel. */
hcd->periodic_channels++;
/* Update claimed usecs per (micro)frame. */
hcd->periodic_usecs += qh->usecs;
/* Update average periodic bandwidth claimed and # periodic reqs for usbfs. */
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_allocated += qh->usecs / qh->interval;
if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_int_reqs++;
DWC_DEBUGPL(DBG_HCD, "Scheduled intr: qh %p, usecs %d, period %d\n",
qh, qh->usecs, qh->interval);
} else {
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_isoc_reqs++;
DWC_DEBUGPL(DBG_HCD, "Scheduled isoc: qh %p, usecs %d, period %d\n",
qh, qh->usecs, qh->interval);
}
return status;
}
/** Free each QTD in the QH's QTD-list then free the QH. QH should already be
* removed from a list. QTD list should already be empty if called from URB
* Dequeue.
*
* @param[in] hcd HCD instance.
* @param[in] qh The QH to free.
*/
void dwc_otg_hcd_qh_free (dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
dwc_otg_qtd_t *qtd;
struct list_head *pos;
unsigned long flags;
/* Free each QTD in the QTD list */
SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
for (pos = qh->qtd_list.next;
pos != &qh->qtd_list;
pos = qh->qtd_list.next)
{
list_del (pos);
qtd = dwc_list_to_qtd (pos);
dwc_otg_hcd_qtd_free (qtd);
}
SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
if (qh->dw_align_buf) {
dma_free_coherent((dwc_otg_hcd_to_hcd(hcd))->self.controller,
hcd->core_if->core_params->max_transfer_size,
qh->dw_align_buf,
qh->dw_align_buf_dma);
}
kfree (qh);
return;
}
static int _disconnect(dwc_otg_hcd_t * hcd)
{
struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
usb_hcd->self.is_b_host = 0;
return 0;
}
/**
* Removes the HCD.
* Frees memory and resources associated with the HCD and deregisters the bus.
*/
void hcd_remove(struct platform_device *_dev)
{
dwc_otg_device_t *otg_dev = platform_get_otgdata(_dev);
dwc_otg_hcd_t *dwc_otg_hcd;
struct usb_hcd *hcd;
DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD REMOVE\n");
if (!otg_dev) {
DWC_DEBUGPL(DBG_ANY, "%s: otg_dev NULL!\n", __func__);
return;
}
dwc_otg_hcd = otg_dev->hcd;
if (!dwc_otg_hcd) {
DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->hcd NULL!\n", __func__);
return;
}
hcd = dwc_otg_hcd_to_hcd(dwc_otg_hcd);
if (!hcd) {
DWC_DEBUGPL(DBG_ANY,
"%s: dwc_otg_hcd_to_hcd(dwc_otg_hcd) NULL!\n",
__func__);
return;
}
usb_remove_hcd(hcd);
dwc_otg_hcd_set_priv_data(dwc_otg_hcd, NULL);
dwc_otg_hcd_remove(dwc_otg_hcd);
usb_put_hcd(hcd);
}
static int _start(dwc_otg_hcd_t * hcd)
{
struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
usb_hcd->self.is_b_host = dwc_otg_hcd_is_b_host(hcd);
hcd_start(usb_hcd);
return 0;
}
/**
* Schedules an interrupt or isochronous transfer in the periodic schedule.
*/
static int schedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
int status;
struct usb_bus *bus = hcd_to_bus(dwc_otg_hcd_to_hcd(hcd));
int frame;
status = find_uframe(hcd, qh);
frame = -1;
if (status == 0) {
frame = 7;
} else {
if (status > 0)
frame = status - 1;
}
/* Set the new frame up */
if (frame > -1) {
qh->sched_frame &= ~0x7;
qh->sched_frame |= (frame & 7);
}
if (status != -1)
status = 0;
if (status) {
pr_notice("%s: Insufficient periodic bandwidth for "
"periodic transfer.\n", __func__);
return status;
}
status = check_max_xfer_size(hcd, qh);
if (status) {
pr_notice("%s: Channel max transfer size too small "
"for periodic transfer.\n", __func__);
return status;
}
/* Always start in the inactive schedule. */
list_add_tail(&qh->qh_list_entry, &hcd->periodic_sched_inactive);
/* Update claimed usecs per (micro)frame. */
hcd->periodic_usecs += qh->usecs;
/*
* Update average periodic bandwidth claimed and # periodic reqs for
* usbfs.
*/
bus->bandwidth_allocated += qh->usecs / qh->interval;
if (qh->ep_type == USB_ENDPOINT_XFER_INT)
bus->bandwidth_int_reqs++;
else
bus->bandwidth_isoc_reqs++;
return status;
}
/**
* Removes an interrupt or isochronous transfer from the periodic schedule.
*
* @param hcd The HCD state structure for the DWC OTG controller.
* @param qh QH for the periodic transfer.
*/
static void deschedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
list_del_init(&qh->qh_list_entry);
/* Release the periodic channel reservation. */
hcd->periodic_channels--;
/* Update claimed usecs per (micro)frame. */
hcd->periodic_usecs -= qh->usecs;
/* Update average periodic bandwidth claimed and # periodic reqs for usbfs. */
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_allocated -= qh->usecs / qh->interval;
if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_int_reqs--;
DWC_DEBUGPL(DBG_HCD, "Descheduled intr: qh %p, usecs %d, period %d\n",
qh, qh->usecs, qh->interval);
} else {
hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_isoc_reqs--;
DWC_DEBUGPL(DBG_HCD, "Descheduled isoc: qh %p, usecs %d, period %d\n",
qh, qh->usecs, qh->interval);
}
}
/**
* Removes an interrupt or isochronous transfer from the periodic schedule.
*/
static void deschedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
struct usb_bus *bus = hcd_to_bus(dwc_otg_hcd_to_hcd(hcd));
int i;
list_del_init(&qh->qh_list_entry);
/* Update claimed usecs per (micro)frame. */
hcd->periodic_usecs -= qh->usecs;
for (i = 0; i < 8; i++) {
hcd->frame_usecs[i] += qh->frame_usecs[i];
qh->frame_usecs[i] = 0;
}
/*
* Update average periodic bandwidth claimed and # periodic reqs for
* usbfs.
*/
bus->bandwidth_allocated -= qh->usecs / qh->interval;
if (qh->ep_type == USB_ENDPOINT_XFER_INT)
bus->bandwidth_int_reqs--;
else
bus->bandwidth_isoc_reqs--;
}
/**
* Deactivates a QH. For non-periodic QHs, removes the QH from the active
* non-periodic schedule. The QH is added to the inactive non-periodic
* schedule if any QTDs are still attached to the QH.
*
* For periodic QHs, the QH is removed from the periodic queued schedule. If
* there are any QTDs still attached to the QH, the QH is added to either the
* periodic inactive schedule or the periodic ready schedule and its next
* scheduled frame is calculated. The QH is placed in the ready schedule if
* the scheduled frame has been reached already. Otherwise it's placed in the
* inactive schedule. If there are no QTDs attached to the QH, the QH is
* completely removed from the periodic schedule.
*/
void dwc_otg_hcd_qh_deactivate(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, int sched_next_periodic_split)
{
unsigned long flags;
SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
if (dwc_qh_is_non_per(qh)) {
dwc_otg_hcd_qh_remove(hcd, qh);
if (!list_empty(&qh->qtd_list)) {
/* Add back to inactive non-periodic schedule. */
dwc_otg_hcd_qh_add(hcd, qh);
}
} else {
uint16_t frame_number = dwc_otg_hcd_get_frame_number(dwc_otg_hcd_to_hcd(hcd));
if (qh->do_split) {
/* Schedule the next continuing periodic split transfer */
if (sched_next_periodic_split) {
qh->sched_frame = frame_number;
if (dwc_frame_num_le(frame_number,
dwc_frame_num_inc(qh->start_split_frame, 1))) {
/*
* Allow one frame to elapse after start
* split microframe before scheduling
* complete split, but DONT if we are
* doing the next start split in the
* same frame for an ISOC out.
*/
if ((qh->ep_type != USB_ENDPOINT_XFER_ISOC) || (qh->ep_is_in != 0)) {
qh->sched_frame = dwc_frame_num_inc(qh->sched_frame, 1);
}
}
} else {
qh->sched_frame = dwc_frame_num_inc(qh->start_split_frame,
qh->interval);
if (dwc_frame_num_le(qh->sched_frame, frame_number)) {
qh->sched_frame = frame_number;
}
qh->sched_frame |= 0x7;
qh->start_split_frame = qh->sched_frame;
}
} else {
qh->sched_frame = dwc_frame_num_inc(qh->sched_frame, qh->interval);
if (dwc_frame_num_le(qh->sched_frame, frame_number)) {
qh->sched_frame = frame_number;
}
}
if (list_empty(&qh->qtd_list)) {
dwc_otg_hcd_qh_remove(hcd, qh);
} else {
/*
* Remove from periodic_sched_queued and move to
* appropriate queue.
*/
if (qh->sched_frame == frame_number) {
list_move(&qh->qh_list_entry,
&hcd->periodic_sched_ready);
} else {
list_move(&qh->qh_list_entry,
&hcd->periodic_sched_inactive);
}
}
}
SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
}
/**
* Sets the final status of an URB and returns it to the device driver. Any
* required cleanup of the URB is performed.
*/
static int _complete(dwc_otg_hcd_t * hcd, void *urb_handle,
dwc_otg_hcd_urb_t * dwc_otg_urb, uint32_t status)
{
struct urb *urb = (struct urb *)urb_handle;
#ifdef DEBUG
if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
DWC_PRINTF("%s: urb %p, device %d, ep %d %s, status=%d\n",
__func__, urb, usb_pipedevice(urb->pipe),
usb_pipeendpoint(urb->pipe),
usb_pipein(urb->pipe) ? "IN" : "OUT", status);
if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
int i;
for (i = 0; i < urb->number_of_packets; i++) {
DWC_PRINTF(" ISO Desc %d status: %d\n",
i, urb->iso_frame_desc[i].status);
}
}
}
#endif
urb->actual_length = dwc_otg_hcd_urb_get_actual_length(dwc_otg_urb);
/* Convert status value. */
switch (status) {
case -DWC_E_PROTOCOL:
status = -EPROTO;
break;
case -DWC_E_IN_PROGRESS:
status = -EINPROGRESS;
break;
case -DWC_E_PIPE:
status = -EPIPE;
break;
case -DWC_E_IO:
status = -EIO;
break;
case -DWC_E_TIMEOUT:
status = -ETIMEDOUT;
break;
default:
if (status) {
/* alan.K
* DWC_OTG IP don't know this status, so assumed to be a DWC_E_PROTOCOL.
*/
DWC_WARN("Unknown urb status %d, but assumed to be an EPROTO\n", status);
status = -EPROTO;
}
}
if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
int i;
urb->error_count = dwc_otg_hcd_urb_get_error_count(dwc_otg_urb);
for (i = 0; i < urb->number_of_packets; ++i) {
urb->iso_frame_desc[i].actual_length =
dwc_otg_hcd_urb_get_iso_desc_actual_length
(dwc_otg_urb, i);
urb->iso_frame_desc[i].status =
dwc_otg_hcd_urb_get_iso_desc_actual_length
(dwc_otg_urb, i);
}
}
urb->status = status;
urb->hcpriv = NULL;
if (!status) {
if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
(urb->actual_length < urb->transfer_buffer_length)) {
urb->status = -EREMOTEIO;
}
}
if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) ||
(usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
struct usb_host_endpoint *ep = dwc_urb_to_endpoint(urb);
if (ep) {
free_bus_bandwidth(dwc_otg_hcd_to_hcd(hcd),
dwc_otg_hcd_get_ep_bandwidth(hcd, ep->hcpriv),
urb);
}
}
dwc_free(dwc_otg_urb);
usb_hcd_giveback_urb(dwc_otg_hcd_to_hcd(hcd), urb, status);
return 0;
}
static int _get_b_hnp_enable(dwc_otg_hcd_t * hcd)
{
struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
return usb_hcd->self.b_hnp_enable;
}