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linux-next/drivers/usb/host/fhci-q.c
Greg Kroah-Hartman fc4e404d58 USB: host: fhci: Remove redundant license text 
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07 15:45:02 +01:00

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