fhci-mem.c
2.62 KB
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/*
* 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>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "fhci.h"
static void init_td(struct td *td)
{
memset(td, 0, sizeof(*td));
INIT_LIST_HEAD(&td->node);
INIT_LIST_HEAD(&td->frame_lh);
}
static void init_ed(struct ed *ed)
{
memset(ed, 0, sizeof(*ed));
INIT_LIST_HEAD(&ed->td_list);
INIT_LIST_HEAD(&ed->node);
}
static struct td *get_empty_td(struct fhci_hcd *fhci)
{
struct td *td;
if (!list_empty(&fhci->empty_tds)) {
td = list_entry(fhci->empty_tds.next, struct td, node);
list_del(fhci->empty_tds.next);
} else {
td = kmalloc(sizeof(*td), GFP_ATOMIC);
if (!td)
fhci_err(fhci, "No memory to allocate to TD\n");
else
init_td(td);
}
return td;
}
void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
{
init_td(td);
list_add(&td->node, &fhci->empty_tds);
}
struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
{
struct ed *ed;
if (!list_empty(&fhci->empty_eds)) {
ed = list_entry(fhci->empty_eds.next, struct ed, node);
list_del(fhci->empty_eds.next);
} else {
ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
if (!ed)
fhci_err(fhci, "No memory to allocate to ED\n");
else
init_ed(ed);
}
return ed;
}
void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
{
init_ed(ed);
list_add(&ed->node, &fhci->empty_eds);
}
struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
struct urb_priv *urb_priv, struct ed *ed, u16 index,
enum fhci_ta_type type, int toggle, u8 *data, u32 len,
u16 interval, u16 start_frame, bool ioc)
{
struct td *td = get_empty_td(fhci);
if (!td)
return NULL;
td->urb = urb;
td->ed = ed;
td->type = type;
td->toggle = toggle;
td->data = data;
td->len = len;
td->iso_index = index;
td->interval = interval;
td->start_frame = start_frame;
td->ioc = ioc;
td->status = USB_TD_OK;
urb_priv->tds[index] = td;
return td;
}