1 | // SPDX-License-Identifier: GPL-2.0+ |
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> |
12 | */ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/types.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/list.h> |
19 | #include <linux/usb.h> |
20 | #include <linux/usb/hcd.h> |
21 | #include "fhci.h" |
22 | |
23 | static void init_td(struct td *td) |
24 | { |
25 | memset(td, 0, sizeof(*td)); |
26 | INIT_LIST_HEAD(list: &td->node); |
27 | INIT_LIST_HEAD(list: &td->frame_lh); |
28 | } |
29 | |
30 | static void init_ed(struct ed *ed) |
31 | { |
32 | memset(ed, 0, sizeof(*ed)); |
33 | INIT_LIST_HEAD(list: &ed->td_list); |
34 | INIT_LIST_HEAD(list: &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(head: &fhci->empty_tds)) { |
42 | td = list_entry(fhci->empty_tds.next, struct td, node); |
43 | list_del(entry: fhci->empty_tds.next); |
44 | } else { |
45 | td = kmalloc(size: 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(new: &td->node, head: &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(head: &fhci->empty_eds)) { |
66 | ed = list_entry(fhci->empty_eds.next, struct ed, node); |
67 | list_del(entry: fhci->empty_eds.next); |
68 | } else { |
69 | ed = kmalloc(size: 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(new: &ed->node, head: &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 | } |
111 | |