| Anton Vorontsov | 236dd4d | 2009-01-10 05:03:21 +0300 | [diff] [blame] | 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/list.h> |
| 22 | #include <linux/usb.h> |
| 23 | #include "../core/hcd.h" |
| 24 | #include "fhci.h" |
| 25 | |
| 26 | static void init_td(struct td *td) |
| 27 | { |
| 28 | memset(td, 0, sizeof(*td)); |
| 29 | INIT_LIST_HEAD(&td->node); |
| 30 | INIT_LIST_HEAD(&td->frame_lh); |
| 31 | } |
| 32 | |
| 33 | static void init_ed(struct ed *ed) |
| 34 | { |
| 35 | memset(ed, 0, sizeof(*ed)); |
| 36 | INIT_LIST_HEAD(&ed->td_list); |
| 37 | INIT_LIST_HEAD(&ed->node); |
| 38 | } |
| 39 | |
| 40 | static struct td *get_empty_td(struct fhci_hcd *fhci) |
| 41 | { |
| 42 | struct td *td; |
| 43 | |
| 44 | if (!list_empty(&fhci->empty_tds)) { |
| 45 | td = list_entry(fhci->empty_tds.next, struct td, node); |
| 46 | list_del(fhci->empty_tds.next); |
| 47 | } else { |
| 48 | td = kmalloc(sizeof(*td), GFP_ATOMIC); |
| 49 | if (!td) |
| 50 | fhci_err(fhci, "No memory to allocate to TD\n"); |
| 51 | else |
| 52 | init_td(td); |
| 53 | } |
| 54 | |
| 55 | return td; |
| 56 | } |
| 57 | |
| 58 | void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td) |
| 59 | { |
| 60 | init_td(td); |
| 61 | list_add(&td->node, &fhci->empty_tds); |
| 62 | } |
| 63 | |
| 64 | struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci) |
| 65 | { |
| 66 | struct ed *ed; |
| 67 | |
| 68 | if (!list_empty(&fhci->empty_eds)) { |
| 69 | ed = list_entry(fhci->empty_eds.next, struct ed, node); |
| 70 | list_del(fhci->empty_eds.next); |
| 71 | } else { |
| 72 | ed = kmalloc(sizeof(*ed), GFP_ATOMIC); |
| 73 | if (!ed) |
| 74 | fhci_err(fhci, "No memory to allocate to ED\n"); |
| 75 | else |
| 76 | init_ed(ed); |
| 77 | } |
| 78 | |
| 79 | return ed; |
| 80 | } |
| 81 | |
| 82 | void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed) |
| 83 | { |
| 84 | init_ed(ed); |
| 85 | list_add(&ed->node, &fhci->empty_eds); |
| 86 | } |
| 87 | |
| 88 | struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb, |
| 89 | struct urb_priv *urb_priv, struct ed *ed, u16 index, |
| 90 | enum fhci_ta_type type, int toggle, u8 *data, u32 len, |
| 91 | u16 interval, u16 start_frame, bool ioc) |
| 92 | { |
| 93 | struct td *td = get_empty_td(fhci); |
| 94 | |
| 95 | if (!td) |
| 96 | return NULL; |
| 97 | |
| 98 | td->urb = urb; |
| 99 | td->ed = ed; |
| 100 | td->type = type; |
| 101 | td->toggle = toggle; |
| 102 | td->data = data; |
| 103 | td->len = len; |
| 104 | td->iso_index = index; |
| 105 | td->interval = interval; |
| 106 | td->start_frame = start_frame; |
| 107 | td->ioc = ioc; |
| 108 | td->status = USB_TD_OK; |
| 109 | |
| 110 | urb_priv->tds[index] = td; |
| 111 | |
| 112 | return td; |
| 113 | } |