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
init_td(struct td * td)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
init_ed(struct ed * ed)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
get_empty_td(struct fhci_hcd * fhci)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
fhci_recycle_empty_td(struct fhci_hcd * fhci,struct td * td)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
fhci_get_empty_ed(struct fhci_hcd * fhci)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
fhci_recycle_empty_ed(struct fhci_hcd * fhci,struct ed * ed)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
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)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