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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
23static 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
30static 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
37static 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
55void 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
61struct 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
79void 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
85struct 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}
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}