1 // SPDX-License-Identifier: GPL-2.0+
3 * Freescale QUICC Engine USB Host Controller Driver
5 * Copyright (c) Freescale Semicondutor, Inc. 2006.
8 * Copyright (c) Logic Product Development, Inc. 2007
10 * Copyright (c) MontaVista Software, Inc. 2008.
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>
23 static void init_td(struct td *td)
25 memset(td, 0, sizeof(*td));
26 INIT_LIST_HEAD(&td->node);
27 INIT_LIST_HEAD(&td->frame_lh);
30 static void init_ed(struct ed *ed)
32 memset(ed, 0, sizeof(*ed));
33 INIT_LIST_HEAD(&ed->td_list);
34 INIT_LIST_HEAD(&ed->node);
37 static struct td *get_empty_td(struct fhci_hcd *fhci)
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);
45 td = kmalloc(sizeof(*td), GFP_ATOMIC);
47 fhci_err(fhci, "No memory to allocate to TD\n");
55 void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
58 list_add(&td->node, &fhci->empty_tds);
61 struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
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);
69 ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
71 fhci_err(fhci, "No memory to allocate to ED\n");
79 void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
82 list_add(&ed->node, &fhci->empty_eds);
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)
90 struct td *td = get_empty_td(fhci);
101 td->iso_index = index;
102 td->interval = interval;
103 td->start_frame = start_frame;
105 td->status = USB_TD_OK;
107 urb_priv->tds[index] = td;