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