+++ /dev/null
-/* ==========================================================================
- * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_queue.c $
- * $Revision: #33 $
- * $Date: 2008/07/15 $
- * $Change: 1064918 $
- *
- * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
- * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
- * otherwise expressly agreed to in writing between Synopsys and you.
- *
- * The Software IS NOT an item of Licensed Software or Licensed Product under
- * any End User Software License Agreement or Agreement for Licensed Product
- * with Synopsys or any supplement thereto. You are permitted to use and
- * redistribute this Software in source and binary forms, with or without
- * modification, provided that redistributions of source code must retain this
- * notice. You may not view, use, disclose, copy or distribute this file or
- * any information contained herein except pursuant to this license grant from
- * Synopsys. If you do not agree with this notice, including the disclaimer
- * below, then you are not authorized to use the Software.
- *
- * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- * ========================================================================== */
-#ifndef DWC_DEVICE_ONLY
-
-/**
- * @file
- *
- * This file contains the functions to manage Queue Heads and Queue
- * Transfer Descriptors.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/version.h>
-
-#include "otg_driver.h"
-#include "otg_hcd.h"
-#include "otg_regs.h"
-
-/**
- * This function allocates and initializes a QH.
- *
- * @param hcd The HCD state structure for the DWC OTG controller.
- * @param[in] urb Holds the information about the device/endpoint that we need
- * to initialize the QH.
- *
- * @return Returns pointer to the newly allocated QH, or NULL on error. */
-dwc_otg_qh_t *dwc_otg_hcd_qh_create (dwc_otg_hcd_t *hcd, struct urb *urb)
-{
- dwc_otg_qh_t *qh;
-
- /* Allocate memory */
- /** @todo add memflags argument */
- qh = dwc_otg_hcd_qh_alloc ();
- if (qh == NULL) {
- return NULL;
- }
-
- dwc_otg_hcd_qh_init (hcd, qh, urb);
- return qh;
-}
-
-/** 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 */
-
-#ifdef CONFIG_SMP
- //the spinlock is locked before this function get called,
- //but in case the lock is needed, the check function is preserved
-
- //but in non-SMP mode, all spinlock is lockable.
- //don't do the test in non-SMP mode
-
- if(spin_trylock(&hcd->lock)) {
- printk("%s: It is not supposed to be lockable!!\n",__func__);
- BUG();
- }
-#endif
-// 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)
-
- kfree (qh);
- return;
-}
-
-/** Initializes a QH structure.
- *
- * @param[in] hcd The HCD state structure for the DWC OTG controller.
- * @param[in] qh The QH to init.
- * @param[in] urb Holds the information about the device/endpoint that we need
- * to initialize the QH. */
-#define SCHEDULE_SLOP 10
-void dwc_otg_hcd_qh_init(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, struct urb *urb)
-{
- char *speed, *type;
- memset (qh, 0, sizeof (dwc_otg_qh_t));
-
- /* Initialize QH */
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- qh->ep_type = USB_ENDPOINT_XFER_CONTROL;
- break;
- case PIPE_BULK:
- qh->ep_type = USB_ENDPOINT_XFER_BULK;
- break;
- case PIPE_ISOCHRONOUS:
- qh->ep_type = USB_ENDPOINT_XFER_ISOC;
- break;
- case PIPE_INTERRUPT:
- qh->ep_type = USB_ENDPOINT_XFER_INT;
- break;
- }
-
- qh->ep_is_in = usb_pipein(urb->pipe) ? 1 : 0;
-
- qh->data_toggle = DWC_OTG_HC_PID_DATA0;
- qh->maxp = usb_maxpacket(urb->dev, urb->pipe, !(usb_pipein(urb->pipe)));
- INIT_LIST_HEAD(&qh->qtd_list);
- INIT_LIST_HEAD(&qh->qh_list_entry);
- qh->channel = NULL;
- qh->speed = urb->dev->speed;
-
- /* FS/LS Enpoint on HS Hub
- * NOT virtual root hub */
- qh->do_split = 0;
- if (((urb->dev->speed == USB_SPEED_LOW) ||
- (urb->dev->speed == USB_SPEED_FULL)) &&
- (urb->dev->tt) && (urb->dev->tt->hub) && (urb->dev->tt->hub->devnum != 1))
- {
- DWC_DEBUGPL(DBG_HCD, "QH init: EP %d: TT found at hub addr %d, for port %d\n",
- usb_pipeendpoint(urb->pipe), urb->dev->tt->hub->devnum,
- urb->dev->ttport);
- qh->do_split = 1;
- }
-
- if (qh->ep_type == USB_ENDPOINT_XFER_INT ||
- qh->ep_type == USB_ENDPOINT_XFER_ISOC) {
- /* Compute scheduling parameters once and save them. */
- hprt0_data_t hprt;
-
- /** @todo Account for split transfers in the bus time. */
- int bytecount = dwc_hb_mult(qh->maxp) * dwc_max_packet(qh->maxp);
- qh->usecs = NS_TO_US(usb_calc_bus_time(urb->dev->speed,
- usb_pipein(urb->pipe),
- (qh->ep_type == USB_ENDPOINT_XFER_ISOC),
- bytecount));
-
- /* Start in a slightly future (micro)frame. */
- qh->sched_frame = dwc_frame_num_inc(hcd->frame_number,
- SCHEDULE_SLOP);
- qh->interval = urb->interval;
-#if 0
- /* Increase interrupt polling rate for debugging. */
- if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
- qh->interval = 8;
- }
-#endif
- hprt.d32 = dwc_read_reg32(hcd->core_if->host_if->hprt0);
- if ((hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED) &&
- ((urb->dev->speed == USB_SPEED_LOW) ||
- (urb->dev->speed == USB_SPEED_FULL))) {
- qh->interval *= 8;
- qh->sched_frame |= 0x7;
- qh->start_split_frame = qh->sched_frame;
- }
-
- }
-
- DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD QH Initialized\n");
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - qh = %p\n", qh);
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - Device Address = %d\n",
- urb->dev->devnum);
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - Endpoint %d, %s\n",
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) == USB_DIR_IN ? "IN" : "OUT");
-
- qh->nak_frame = 0xffff;
-
- switch(urb->dev->speed) {
- case USB_SPEED_LOW:
- speed = "low";
- break;
- case USB_SPEED_FULL:
- speed = "full";
- break;
- case USB_SPEED_HIGH:
- speed = "high";
- break;
- default:
- speed = "?";
- break;
- }
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - Speed = %s\n", speed);
-
- switch (qh->ep_type) {
- case USB_ENDPOINT_XFER_ISOC:
- type = "isochronous";
- break;
- case USB_ENDPOINT_XFER_INT:
- type = "interrupt";
- break;
- case USB_ENDPOINT_XFER_CONTROL:
- type = "control";
- break;
- case USB_ENDPOINT_XFER_BULK:
- type = "bulk";
- break;
- default:
- type = "?";
- break;
- }
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - Type = %s\n",type);
-
-#ifdef DEBUG
- if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - usecs = %d\n",
- qh->usecs);
- DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - interval = %d\n",
- qh->interval);
- }
-#endif
-
- return;
-}
-
-/**
- * Microframe scheduler
- * track the total use in hcd->frame_usecs
- * keep each qh use in qh->frame_usecs
- * when surrendering the qh then donate the time back
- */
-static const u16 max_uframe_usecs[] = { 100, 100, 100, 100, 100, 100, 30, 0 };
-
-/*
- * called from dwc_otg_hcd.c:dwc_otg_hcd_init
- */
-int init_hcd_usecs(dwc_otg_hcd_t *hcd)
-{
- int i;
-
- for (i = 0; i < 8; i++)
- hcd->frame_usecs[i] = max_uframe_usecs[i];
-
- return 0;
-}
-
-static int find_single_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- int i;
- u16 utime;
- int t_left;
- int ret;
- int done;
-
- ret = -1;
- utime = qh->usecs;
- t_left = utime;
- i = 0;
- done = 0;
- while (done == 0) {
- /* At the start hcd->frame_usecs[i] = max_uframe_usecs[i]; */
- if (utime <= hcd->frame_usecs[i]) {
- hcd->frame_usecs[i] -= utime;
- qh->frame_usecs[i] += utime;
- t_left -= utime;
- ret = i;
- done = 1;
- return ret;
- } else {
- i++;
- if (i == 8) {
- done = 1;
- ret = -1;
- }
- }
- }
- return ret;
-}
-
-/*
- * use this for FS apps that can span multiple uframes
- */
-static int find_multi_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- int i;
- int j;
- u16 utime;
- int t_left;
- int ret;
- int done;
- u16 xtime;
-
- ret = -1;
- utime = qh->usecs;
- t_left = utime;
- i = 0;
- done = 0;
-loop:
- while (done == 0) {
- if (hcd->frame_usecs[i] <= 0) {
- i++;
- if (i == 8) {
- done = 1;
- ret = -1;
- }
- goto loop;
- }
-
- /*
- * We need n consequtive slots so use j as a start slot.
- * j plus j+1 must be enough time (for now)
- */
- xtime = hcd->frame_usecs[i];
- for (j = i + 1; j < 8; j++) {
- /*
- * if we add this frame remaining time to xtime we may
- * be OK, if not we need to test j for a complete frame.
- */
- if ((xtime + hcd->frame_usecs[j]) < utime) {
- if (hcd->frame_usecs[j] < max_uframe_usecs[j]) {
- j = 8;
- ret = -1;
- continue;
- }
- }
- if (xtime >= utime) {
- ret = i;
- j = 8; /* stop loop with a good value ret */
- continue;
- }
- /* add the frame time to x time */
- xtime += hcd->frame_usecs[j];
- /* we must have a fully available next frame or break */
- if ((xtime < utime) &&
- (hcd->frame_usecs[j] == max_uframe_usecs[j])) {
- ret = -1;
- j = 8; /* stop loop with a bad value ret */
- continue;
- }
- }
- if (ret >= 0) {
- t_left = utime;
- for (j = i; (t_left > 0) && (j < 8); j++) {
- t_left -= hcd->frame_usecs[j];
- if (t_left <= 0) {
- qh->frame_usecs[j] +=
- hcd->frame_usecs[j] + t_left;
- hcd->frame_usecs[j] = -t_left;
- ret = i;
- done = 1;
- } else {
- qh->frame_usecs[j] +=
- hcd->frame_usecs[j];
- hcd->frame_usecs[j] = 0;
- }
- }
- } else {
- i++;
- if (i == 8) {
- done = 1;
- ret = -1;
- }
- }
- }
- return ret;
-}
-
-static int find_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- int ret = -1;
-
- if (qh->speed == USB_SPEED_HIGH)
- /* if this is a hs transaction we need a full frame */
- ret = find_single_uframe(hcd, qh);
- else
- /* FS transaction may need a sequence of frames */
- ret = find_multi_uframe(hcd, qh);
-
- return ret;
-}
-
-/**
- * Checks that the max transfer size allowed in a host channel is large enough
- * to handle the maximum data transfer in a single (micro)frame for a periodic
- * transfer.
- *
- * @param hcd The HCD state structure for the DWC OTG controller.
- * @param qh QH for a periodic endpoint.
- *
- * @return 0 if successful, negative error code otherwise.
- */
-static int check_max_xfer_size(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- int status;
- uint32_t max_xfer_size;
- uint32_t max_channel_xfer_size;
-
- status = 0;
-
- max_xfer_size = dwc_max_packet(qh->maxp) * dwc_hb_mult(qh->maxp);
- max_channel_xfer_size = hcd->core_if->core_params->max_transfer_size;
-
- if (max_xfer_size > max_channel_xfer_size) {
- DWC_NOTICE("%s: Periodic xfer length %d > "
- "max xfer length for channel %d\n",
- __func__, max_xfer_size, max_channel_xfer_size);
- status = -ENOSPC;
- }
-
- return status;
-}
-
-/**
- * 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;
- int num_channels;
-
- num_channels = hcd->core_if->core_params->host_channels;
-
- if ((hcd->periodic_channels < num_channels - 1)) {
- if (hcd->periodic_channels + hcd->nakking_channels >= num_channels) {
- /* All non-periodic channels are nakking? Halt
- * one to make room (as long as there is at
- * least one channel for non-periodic transfers,
- * all the blocking non-periodics can time-share
- * that one channel. */
- dwc_hc_t *hc = dwc_otg_halt_nakking_channel(hcd);
- if (hc)
- DWC_DEBUGPL(DBG_HCD, "Out of Host Channels for periodic transfer - Halting channel %d (dev %d ep%d%s)\n", hc->hc_num, hc->dev_addr, hc->ep_num, (hc->ep_is_in ? "in" : "out"));
- }
- /* It could be that all channels are currently occupied,
- * but in that case one will be freed up soon (either
- * because it completed or because it was forced to halt
- * above). */
- }
- 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);
-
- hcd->periodic_channels++;
-
- /* 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;
-}
-
-/**
- * This function adds a QH to either the non periodic or periodic schedule if
- * it is not already in the schedule. If the QH is already in the schedule, no
- * action is taken.
- *
- * @return 0 if successful, negative error code otherwise.
- */
-int dwc_otg_hcd_qh_add (dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- //unsigned long flags;
- int status = 0;
-
-#ifdef CONFIG_SMP
- //the spinlock is locked before this function get called,
- //but in case the lock is needed, the check function is preserved
- //but in non-SMP mode, all spinlock is lockable.
- //don't do the test in non-SMP mode
-
- if(spin_trylock(&hcd->lock)) {
- printk("%s: It is not supposed to be lockable!!\n",__func__);
- BUG();
- }
-#endif
-// SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
-
- if (!list_empty(&qh->qh_list_entry)) {
- /* QH already in a schedule. */
- goto done;
- }
-
- /* Add the new QH to the appropriate schedule */
- if (dwc_qh_is_non_per(qh)) {
- /* Always start in the inactive schedule. */
- list_add_tail(&qh->qh_list_entry, &hcd->non_periodic_sched_inactive);
- } else {
- status = schedule_periodic(hcd, qh);
- }
-
- done:
-// SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
-
- return status;
-}
-
-/**
- * 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);
-
- hcd->periodic_channels--;
-
- /* 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--;
-}
-
-/**
- * Removes a QH from either the non-periodic or periodic schedule. Memory is
- * not freed.
- *
- * @param[in] hcd The HCD state structure.
- * @param[in] qh QH to remove from schedule. */
-void dwc_otg_hcd_qh_remove (dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
-{
- //unsigned long flags;
-
-#ifdef CONFIG_SMP
- //the spinlock is locked before this function get called,
- //but in case the lock is needed, the check function is preserved
- //but in non-SMP mode, all spinlock is lockable.
- //don't do the test in non-SMP mode
-
- if(spin_trylock(&hcd->lock)) {
- printk("%s: It is not supposed to be lockable!!\n",__func__);
- BUG();
- }
-#endif
-// SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
-
- if (list_empty(&qh->qh_list_entry)) {
- /* QH is not in a schedule. */
- goto done;
- }
-
- if (dwc_qh_is_non_per(qh)) {
- if (hcd->non_periodic_qh_ptr == &qh->qh_list_entry) {
- hcd->non_periodic_qh_ptr = hcd->non_periodic_qh_ptr->next;
- }
- list_del_init(&qh->qh_list_entry);
- } else {
- deschedule_periodic(hcd, qh);
- }
-
- done:
-// SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
- return;
-}
-
-/**
- * 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)
-{
- 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);
- }
- }
- }
-}
-
-/**
- * This function allocates and initializes a QTD.
- *
- * @param[in] urb The URB to create a QTD from. Each URB-QTD pair will end up
- * pointing to each other so each pair should have a unique correlation.
- *
- * @return Returns pointer to the newly allocated QTD, or NULL on error. */
-dwc_otg_qtd_t *dwc_otg_hcd_qtd_create (struct urb *urb)
-{
- dwc_otg_qtd_t *qtd;
-
- qtd = dwc_otg_hcd_qtd_alloc ();
- if (qtd == NULL) {
- return NULL;
- }
-
- dwc_otg_hcd_qtd_init (qtd, urb);
- return qtd;
-}
-
-/**
- * Initializes a QTD structure.
- *
- * @param[in] qtd The QTD to initialize.
- * @param[in] urb The URB to use for initialization. */
-void dwc_otg_hcd_qtd_init (dwc_otg_qtd_t *qtd, struct urb *urb)
-{
- memset (qtd, 0, sizeof (dwc_otg_qtd_t));
- qtd->urb = urb;
- if (usb_pipecontrol(urb->pipe)) {
- /*
- * The only time the QTD data toggle is used is on the data
- * phase of control transfers. This phase always starts with
- * DATA1.
- */
- qtd->data_toggle = DWC_OTG_HC_PID_DATA1;
- qtd->control_phase = DWC_OTG_CONTROL_SETUP;
- }
-
- /* start split */
- qtd->complete_split = 0;
- qtd->isoc_split_pos = DWC_HCSPLIT_XACTPOS_ALL;
- qtd->isoc_split_offset = 0;
-
- /* Store the qtd ptr in the urb to reference what QTD. */
- urb->hcpriv = qtd;
- return;
-}
-
-/**
- * This function adds a QTD to the QTD-list of a QH. It will find the correct
- * QH to place the QTD into. If it does not find a QH, then it will create a
- * new QH. If the QH to which the QTD is added is not currently scheduled, it
- * is placed into the proper schedule based on its EP type.
- *
- * @param[in] qtd The QTD to add
- * @param[in] dwc_otg_hcd The DWC HCD structure
- *
- * @return 0 if successful, negative error code otherwise.
- */
-int dwc_otg_hcd_qtd_add (dwc_otg_qtd_t *qtd,
- dwc_otg_hcd_t *dwc_otg_hcd)
-{
- struct usb_host_endpoint *ep;
- dwc_otg_qh_t *qh;
- int retval = 0;
-
- struct urb *urb = qtd->urb;
-
- /*
- * Get the QH which holds the QTD-list to insert to. Create QH if it
- * doesn't exist.
- */
- usb_hcd_link_urb_to_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd), urb);
- ep = dwc_urb_to_endpoint(urb);
- qh = (dwc_otg_qh_t *)ep->hcpriv;
- if (qh == NULL) {
- qh = dwc_otg_hcd_qh_create (dwc_otg_hcd, urb);
- if (qh == NULL) {
- usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd), urb);
- retval = -ENOMEM;
- goto done;
- }
- ep->hcpriv = qh;
- }
-
- retval = dwc_otg_hcd_qh_add(dwc_otg_hcd, qh);
- if (retval == 0) {
- list_add_tail(&qtd->qtd_list_entry, &qh->qtd_list);
- } else {
- usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd), urb);
- }
-
- done:
- return retval;
-}
-
-#endif /* DWC_DEVICE_ONLY */
projects / openwrt.git / blobdiff