| | 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 | |
| | 27 | static 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 | |
| | 34 | static 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 | |
| | 41 | static 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 | |
| | 59 | void 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 | |
| | 65 | struct 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 | |
| | 83 | void 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 | |
| | 89 | struct 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 | } |
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame_incremental