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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
236dd4d1 AV |
2 | /* |
3 | * Freescale QUICC Engine USB Host Controller Driver | |
4 | * | |
5 | * Copyright (c) Freescale Semicondutor, Inc. 2006. | |
6 | * Shlomi Gridish <gridish@freescale.com> | |
7 | * Jerry Huang <Chang-Ming.Huang@freescale.com> | |
8 | * Copyright (c) Logic Product Development, Inc. 2007 | |
9 | * Peter Barada <peterb@logicpd.com> | |
10 | * Copyright (c) MontaVista Software, Inc. 2008. | |
11 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
236dd4d1 AV |
12 | */ |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/delay.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
236dd4d1 AV |
18 | #include <linux/list.h> |
19 | #include <linux/usb.h> | |
27729aad | 20 | #include <linux/usb/hcd.h> |
236dd4d1 AV |
21 | #include "fhci.h" |
22 | ||
23 | static void init_td(struct td *td) | |
24 | { | |
25 | memset(td, 0, sizeof(*td)); | |
26 | INIT_LIST_HEAD(&td->node); | |
27 | INIT_LIST_HEAD(&td->frame_lh); | |
28 | } | |
29 | ||
30 | static void init_ed(struct ed *ed) | |
31 | { | |
32 | memset(ed, 0, sizeof(*ed)); | |
33 | INIT_LIST_HEAD(&ed->td_list); | |
34 | INIT_LIST_HEAD(&ed->node); | |
35 | } | |
36 | ||
37 | static struct td *get_empty_td(struct fhci_hcd *fhci) | |
38 | { | |
39 | struct td *td; | |
40 | ||
41 | if (!list_empty(&fhci->empty_tds)) { | |
42 | td = list_entry(fhci->empty_tds.next, struct td, node); | |
43 | list_del(fhci->empty_tds.next); | |
44 | } else { | |
45 | td = kmalloc(sizeof(*td), GFP_ATOMIC); | |
46 | if (!td) | |
47 | fhci_err(fhci, "No memory to allocate to TD\n"); | |
48 | else | |
49 | init_td(td); | |
50 | } | |
51 | ||
52 | return td; | |
53 | } | |
54 | ||
55 | void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td) | |
56 | { | |
57 | init_td(td); | |
58 | list_add(&td->node, &fhci->empty_tds); | |
59 | } | |
60 | ||
61 | struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci) | |
62 | { | |
63 | struct ed *ed; | |
64 | ||
65 | if (!list_empty(&fhci->empty_eds)) { | |
66 | ed = list_entry(fhci->empty_eds.next, struct ed, node); | |
67 | list_del(fhci->empty_eds.next); | |
68 | } else { | |
69 | ed = kmalloc(sizeof(*ed), GFP_ATOMIC); | |
70 | if (!ed) | |
71 | fhci_err(fhci, "No memory to allocate to ED\n"); | |
72 | else | |
73 | init_ed(ed); | |
74 | } | |
75 | ||
76 | return ed; | |
77 | } | |
78 | ||
79 | void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed) | |
80 | { | |
81 | init_ed(ed); | |
82 | list_add(&ed->node, &fhci->empty_eds); | |
83 | } | |
84 | ||
85 | struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb, | |
86 | struct urb_priv *urb_priv, struct ed *ed, u16 index, | |
87 | enum fhci_ta_type type, int toggle, u8 *data, u32 len, | |
88 | u16 interval, u16 start_frame, bool ioc) | |
89 | { | |
90 | struct td *td = get_empty_td(fhci); | |
91 | ||
92 | if (!td) | |
93 | return NULL; | |
94 | ||
95 | td->urb = urb; | |
96 | td->ed = ed; | |
97 | td->type = type; | |
98 | td->toggle = toggle; | |
99 | td->data = data; | |
100 | td->len = len; | |
101 | td->iso_index = index; | |
102 | td->interval = interval; | |
103 | td->start_frame = start_frame; | |
104 | td->ioc = ioc; | |
105 | td->status = USB_TD_OK; | |
106 | ||
107 | urb_priv->tds[index] = td; | |
108 | ||
109 | return td; | |
110 | } |