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} 115