diff options
Diffstat (limited to 'target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c')
| -rw-r--r-- | target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c | 813 |
1 files changed, 0 insertions, 813 deletions
diff --git a/target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c b/target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c deleted file mode 100644 index aaed49dcd6..0000000000 --- a/target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c +++ /dev/null @@ -1,813 +0,0 @@ -/* ========================================================================== - * $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 */ |