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/list.h>
22 #include <linux/usb.h>
23 #include "../core/hcd.h"
24 #include "fhci.h"
25
init_td(struct td * td)26 static void init_td(struct td *td)
27 {
28 memset(td, 0, sizeof(*td));
29 INIT_LIST_HEAD(&td->node);
30 INIT_LIST_HEAD(&td->frame_lh);
31 }
32
init_ed(struct ed * ed)33 static void init_ed(struct ed *ed)
34 {
35 memset(ed, 0, sizeof(*ed));
36 INIT_LIST_HEAD(&ed->td_list);
37 INIT_LIST_HEAD(&ed->node);
38 }
39
get_empty_td(struct fhci_hcd * fhci)40 static struct td *get_empty_td(struct fhci_hcd *fhci)
41 {
42 struct td *td;
43
44 if (!list_empty(&fhci->empty_tds)) {
45 td = list_entry(fhci->empty_tds.next, struct td, node);
46 list_del(fhci->empty_tds.next);
47 } else {
48 td = kmalloc(sizeof(*td), GFP_ATOMIC);
49 if (!td)
50 fhci_err(fhci, "No memory to allocate to TD\n");
51 else
52 init_td(td);
53 }
54
55 return td;
56 }
57
fhci_recycle_empty_td(struct fhci_hcd * fhci,struct td * td)58 void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
59 {
60 init_td(td);
61 list_add(&td->node, &fhci->empty_tds);
62 }
63
fhci_get_empty_ed(struct fhci_hcd * fhci)64 struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
65 {
66 struct ed *ed;
67
68 if (!list_empty(&fhci->empty_eds)) {
69 ed = list_entry(fhci->empty_eds.next, struct ed, node);
70 list_del(fhci->empty_eds.next);
71 } else {
72 ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
73 if (!ed)
74 fhci_err(fhci, "No memory to allocate to ED\n");
75 else
76 init_ed(ed);
77 }
78
79 return ed;
80 }
81
fhci_recycle_empty_ed(struct fhci_hcd * fhci,struct ed * ed)82 void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
83 {
84 init_ed(ed);
85 list_add(&ed->node, &fhci->empty_eds);
86 }
87
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)88 struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
89 struct urb_priv *urb_priv, struct ed *ed, u16 index,
90 enum fhci_ta_type type, int toggle, u8 *data, u32 len,
91 u16 interval, u16 start_frame, bool ioc)
92 {
93 struct td *td = get_empty_td(fhci);
94
95 if (!td)
96 return NULL;
97
98 td->urb = urb;
99 td->ed = ed;
100 td->type = type;
101 td->toggle = toggle;
102 td->data = data;
103 td->len = len;
104 td->iso_index = index;
105 td->interval = interval;
106 td->start_frame = start_frame;
107 td->ioc = ioc;
108 td->status = USB_TD_OK;
109
110 urb_priv->tds[index] = td;
111
112 return td;
113 }
114