282 lines
6.7 KiB
C
282 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale QUICC Engine USB Host Controller Driver
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*
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* Copyright (c) Freescale Semicondutor, Inc. 2006.
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* Shlomi Gridish <gridish@freescale.com>
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* Jerry Huang <Chang-Ming.Huang@freescale.com>
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* Copyright (c) Logic Product Development, Inc. 2007
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* Peter Barada <peterb@logicpd.com>
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* Copyright (c) MontaVista Software, Inc. 2008.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "fhci.h"
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/* maps the hardware error code to the USB error code */
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static int status_to_error(u32 status)
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{
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if (status == USB_TD_OK)
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return 0;
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else if (status & USB_TD_RX_ER_CRC)
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return -EILSEQ;
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else if (status & USB_TD_RX_ER_NONOCT)
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return -EPROTO;
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else if (status & USB_TD_RX_ER_OVERUN)
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return -ECOMM;
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else if (status & USB_TD_RX_ER_BITSTUFF)
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return -EPROTO;
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else if (status & USB_TD_RX_ER_PID)
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return -EILSEQ;
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else if (status & (USB_TD_TX_ER_NAK | USB_TD_TX_ER_TIMEOUT))
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return -ETIMEDOUT;
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else if (status & USB_TD_TX_ER_STALL)
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return -EPIPE;
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else if (status & USB_TD_TX_ER_UNDERUN)
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return -ENOSR;
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else if (status & USB_TD_RX_DATA_UNDERUN)
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return -EREMOTEIO;
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else if (status & USB_TD_RX_DATA_OVERUN)
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return -EOVERFLOW;
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else
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return -EINVAL;
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}
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void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td)
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{
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list_add_tail(&td->frame_lh, &frame->tds_list);
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}
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void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number)
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{
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int i;
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for (i = 0; i < number; i++) {
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struct td *td = td_list[i];
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list_add_tail(&td->node, &ed->td_list);
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}
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if (ed->td_head == NULL)
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ed->td_head = td_list[0];
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}
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static struct td *peek_td_from_ed(struct ed *ed)
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{
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struct td *td;
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if (!list_empty(&ed->td_list))
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td = list_entry(ed->td_list.next, struct td, node);
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else
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td = NULL;
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return td;
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}
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struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame)
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{
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struct td *td;
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if (!list_empty(&frame->tds_list)) {
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td = list_entry(frame->tds_list.next, struct td, frame_lh);
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list_del_init(frame->tds_list.next);
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} else
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td = NULL;
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return td;
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}
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struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame)
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{
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struct td *td;
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if (!list_empty(&frame->tds_list))
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td = list_entry(frame->tds_list.next, struct td, frame_lh);
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else
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td = NULL;
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return td;
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}
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struct td *fhci_remove_td_from_ed(struct ed *ed)
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{
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struct td *td;
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if (!list_empty(&ed->td_list)) {
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td = list_entry(ed->td_list.next, struct td, node);
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list_del_init(ed->td_list.next);
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/* if this TD was the ED's head, find next TD */
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if (!list_empty(&ed->td_list))
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ed->td_head = list_entry(ed->td_list.next, struct td,
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node);
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else
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ed->td_head = NULL;
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} else
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td = NULL;
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return td;
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}
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struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list)
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{
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struct td *td;
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if (!list_empty(&p_list->done_list)) {
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td = list_entry(p_list->done_list.next, struct td, node);
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list_del_init(p_list->done_list.next);
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} else
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td = NULL;
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return td;
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}
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void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed)
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{
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struct td *td;
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td = ed->td_head;
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list_del_init(&td->node);
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/* If this TD was the ED's head,find next TD */
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if (!list_empty(&ed->td_list))
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ed->td_head = list_entry(ed->td_list.next, struct td, node);
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else {
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ed->td_head = NULL;
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ed->state = FHCI_ED_SKIP;
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}
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ed->toggle_carry = td->toggle;
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list_add_tail(&td->node, &usb->hc_list->done_list);
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if (td->ioc)
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usb->transfer_confirm(usb->fhci);
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}
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/* free done FHCI URB resource such as ED and TD */
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static void free_urb_priv(struct fhci_hcd *fhci, struct urb *urb)
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{
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int i;
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struct urb_priv *urb_priv = urb->hcpriv;
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struct ed *ed = urb_priv->ed;
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for (i = 0; i < urb_priv->num_of_tds; i++) {
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list_del_init(&urb_priv->tds[i]->node);
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fhci_recycle_empty_td(fhci, urb_priv->tds[i]);
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}
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/* if this TD was the ED's head,find the next TD */
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if (!list_empty(&ed->td_list))
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ed->td_head = list_entry(ed->td_list.next, struct td, node);
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else
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ed->td_head = NULL;
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kfree(urb_priv->tds);
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kfree(urb_priv);
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urb->hcpriv = NULL;
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/* if this TD was the ED's head,find next TD */
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if (ed->td_head == NULL)
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list_del_init(&ed->node);
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fhci->active_urbs--;
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}
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/* this routine called to complete and free done URB */
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void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb)
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{
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free_urb_priv(fhci, urb);
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if (urb->status == -EINPROGRESS) {
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if (urb->actual_length != urb->transfer_buffer_length &&
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urb->transfer_flags & URB_SHORT_NOT_OK)
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urb->status = -EREMOTEIO;
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else
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urb->status = 0;
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}
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usb_hcd_unlink_urb_from_ep(fhci_to_hcd(fhci), urb);
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spin_unlock(&fhci->lock);
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usb_hcd_giveback_urb(fhci_to_hcd(fhci), urb, urb->status);
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spin_lock(&fhci->lock);
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}
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/*
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* caculate transfer length/stats and update the urb
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* Precondition: irqsafe(only for urb-?status locking)
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*/
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void fhci_done_td(struct urb *urb, struct td *td)
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{
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struct ed *ed = td->ed;
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u32 cc = td->status;
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/* ISO...drivers see per-TD length/status */
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if (ed->mode == FHCI_TF_ISO) {
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u32 len;
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if (!(urb->transfer_flags & URB_SHORT_NOT_OK &&
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cc == USB_TD_RX_DATA_UNDERUN))
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cc = USB_TD_OK;
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if (usb_pipeout(urb->pipe))
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len = urb->iso_frame_desc[td->iso_index].length;
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else
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len = td->actual_len;
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urb->actual_length += len;
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urb->iso_frame_desc[td->iso_index].actual_length = len;
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urb->iso_frame_desc[td->iso_index].status =
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status_to_error(cc);
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}
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/* BULK,INT,CONTROL... drivers see aggregate length/status,
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* except that "setup" bytes aren't counted and "short" transfers
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* might not be reported as errors.
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*/
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else {
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if (td->error_cnt >= 3)
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urb->error_count = 3;
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/* control endpoint only have soft stalls */
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/* update packet status if needed(short may be ok) */
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if (!(urb->transfer_flags & URB_SHORT_NOT_OK) &&
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cc == USB_TD_RX_DATA_UNDERUN) {
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ed->state = FHCI_ED_OPER;
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cc = USB_TD_OK;
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}
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if (cc != USB_TD_OK) {
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if (urb->status == -EINPROGRESS)
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urb->status = status_to_error(cc);
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}
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/* count all non-empty packets except control SETUP packet */
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if (td->type != FHCI_TA_SETUP || td->iso_index != 0)
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urb->actual_length += td->actual_len;
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}
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}
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/* there are some pedning request to unlink */
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void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed)
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{
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struct td *td = peek_td_from_ed(ed);
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struct urb *urb = td->urb;
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struct urb_priv *urb_priv = urb->hcpriv;
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if (urb_priv->state == URB_DEL) {
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td = fhci_remove_td_from_ed(ed);
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/* HC may have partly processed this TD */
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if (td->status != USB_TD_INPROGRESS)
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fhci_done_td(urb, td);
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/* URB is done;clean up */
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if (++(urb_priv->tds_cnt) == urb_priv->num_of_tds)
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fhci_urb_complete_free(fhci, urb);
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}
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}
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