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236dd4d18f
This patch adds support for the FHCI USB controller, as found in the Freescale MPC836x and MPC832x processors. It can support Full or Low speed modes. Quite a lot the hardware is doing by itself (SOF generation, CRC generation and checking), though scheduling and retransmission is on software's shoulders. This controller does not integrate the root hub, so this driver also fakes one-port hub. External hub is required to support more than one device. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
/*
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* Freescale QUICC Engine USB Host Controller Driver
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*
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* Copyright (c) Freescale Semicondutor, Inc. 2006.
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* Shlomi Gridish <gridish@freescale.com>
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* Jerry Huang <Chang-Ming.Huang@freescale.com>
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* Copyright (c) Logic Product Development, Inc. 2007
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* Peter Barada <peterb@logicpd.com>
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* Copyright (c) MontaVista Software, Inc. 2008.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include "../core/hcd.h"
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#include "fhci.h"
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static void init_td(struct td *td)
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{
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memset(td, 0, sizeof(*td));
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INIT_LIST_HEAD(&td->node);
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INIT_LIST_HEAD(&td->frame_lh);
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}
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static void init_ed(struct ed *ed)
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{
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memset(ed, 0, sizeof(*ed));
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INIT_LIST_HEAD(&ed->td_list);
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INIT_LIST_HEAD(&ed->node);
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}
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static struct td *get_empty_td(struct fhci_hcd *fhci)
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{
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struct td *td;
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if (!list_empty(&fhci->empty_tds)) {
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td = list_entry(fhci->empty_tds.next, struct td, node);
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list_del(fhci->empty_tds.next);
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} else {
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td = kmalloc(sizeof(*td), GFP_ATOMIC);
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if (!td)
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fhci_err(fhci, "No memory to allocate to TD\n");
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else
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init_td(td);
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}
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return td;
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}
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void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
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{
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init_td(td);
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list_add(&td->node, &fhci->empty_tds);
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}
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struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
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{
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struct ed *ed;
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if (!list_empty(&fhci->empty_eds)) {
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ed = list_entry(fhci->empty_eds.next, struct ed, node);
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list_del(fhci->empty_eds.next);
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} else {
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ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
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if (!ed)
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fhci_err(fhci, "No memory to allocate to ED\n");
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else
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init_ed(ed);
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}
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return ed;
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}
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void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
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{
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init_ed(ed);
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list_add(&ed->node, &fhci->empty_eds);
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}
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struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
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struct urb_priv *urb_priv, struct ed *ed, u16 index,
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enum fhci_ta_type type, int toggle, u8 *data, u32 len,
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u16 interval, u16 start_frame, bool ioc)
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{
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struct td *td = get_empty_td(fhci);
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if (!td)
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return NULL;
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td->urb = urb;
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td->ed = ed;
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td->type = type;
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td->toggle = toggle;
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td->data = data;
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td->len = len;
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td->iso_index = index;
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td->interval = interval;
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td->start_frame = start_frame;
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td->ioc = ioc;
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td->status = USB_TD_OK;
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urb_priv->tds[index] = td;
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return td;
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}
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