1/*
2 * Freescale QUICC Engine USB Host Controller Driver
3 *
4 * Copyright (c) Freescale Semicondutor, Inc. 2006.
5 *               Shlomi Gridish <gridish@freescale.com>
6 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
7 * Copyright (c) Logic Product Development, Inc. 2007
8 *               Peter Barada <peterb@logicpd.com>
9 * Copyright (c) MontaVista Software, Inc. 2008.
10 *               Anton Vorontsov <avorontsov@ru.mvista.com>
11 *
12 * This program is free software; you can redistribute  it and/or modify it
13 * under  the terms of  the GNU General  Public License as published by the
14 * Free Software Foundation;  either version 2 of the  License, or (at your
15 * option) any later version.
16 */
17
18#include <linux/kernel.h>
19#include <linux/types.h>
20#include <linux/delay.h>
21#include <linux/slab.h>
22#include <linux/list.h>
23#include <linux/usb.h>
24#include <linux/usb/hcd.h>
25#include "fhci.h"
26
27static void init_td(struct td *td)
28{
29	memset(td, 0, sizeof(*td));
30	INIT_LIST_HEAD(&td->node);
31	INIT_LIST_HEAD(&td->frame_lh);
32}
33
34static void init_ed(struct ed *ed)
35{
36	memset(ed, 0, sizeof(*ed));
37	INIT_LIST_HEAD(&ed->td_list);
38	INIT_LIST_HEAD(&ed->node);
39}
40
41static struct td *get_empty_td(struct fhci_hcd *fhci)
42{
43	struct td *td;
44
45	if (!list_empty(&fhci->empty_tds)) {
46		td = list_entry(fhci->empty_tds.next, struct td, node);
47		list_del(fhci->empty_tds.next);
48	} else {
49		td = kmalloc(sizeof(*td), GFP_ATOMIC);
50		if (!td)
51			fhci_err(fhci, "No memory to allocate to TD\n");
52		else
53			init_td(td);
54	}
55
56	return td;
57}
58
59void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
60{
61	init_td(td);
62	list_add(&td->node, &fhci->empty_tds);
63}
64
65struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
66{
67	struct ed *ed;
68
69	if (!list_empty(&fhci->empty_eds)) {
70		ed = list_entry(fhci->empty_eds.next, struct ed, node);
71		list_del(fhci->empty_eds.next);
72	} else {
73		ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
74		if (!ed)
75			fhci_err(fhci, "No memory to allocate to ED\n");
76		else
77			init_ed(ed);
78	}
79
80	return ed;
81}
82
83void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
84{
85	init_ed(ed);
86	list_add(&ed->node, &fhci->empty_eds);
87}
88
89struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
90			struct urb_priv *urb_priv, struct ed *ed, u16 index,
91			enum fhci_ta_type type, int toggle, u8 *data, u32 len,
92			u16 interval, u16 start_frame, bool ioc)
93{
94	struct td *td = get_empty_td(fhci);
95
96	if (!td)
97		return NULL;
98
99	td->urb = urb;
100	td->ed = ed;
101	td->type = type;
102	td->toggle = toggle;
103	td->data = data;
104	td->len = len;
105	td->iso_index = index;
106	td->interval = interval;
107	td->start_frame = start_frame;
108	td->ioc = ioc;
109	td->status = USB_TD_OK;
110
111	urb_priv->tds[index] = td;
112
113	return td;
114}
115