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236dd4d1 AV |
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> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
236dd4d1 AV |
22 | #include <linux/list.h> |
23 | #include <linux/usb.h> | |
27729aad | 24 | #include <linux/usb/hcd.h> |
236dd4d1 AV |
25 | #include "fhci.h" |
26 | ||
27 | static 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 | ||
34 | static 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 | ||
41 | static 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 | ||
59 | void 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 | ||
65 | struct 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 | ||
83 | void 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 | ||
89 | struct 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 | } |