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arch
mips
pci
fixup-rbtx4927.c
Go to the documentation of this file.
1
/*
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*
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* BRIEF MODULE DESCRIPTION
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* Board specific pci fixups for the Toshiba rbtx4927
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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*
[email protected]
or
[email protected]
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*
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* Copyright (C) 2000-2001 Toshiba Corporation
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*
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* Copyright (C) 2004 MontaVista Software Inc.
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* Author: Manish Lachwani (
[email protected]
)
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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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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/types.h>
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#include <
asm/txx9/pci.h
>
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#include <
asm/txx9/rbtx4927.h
>
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int
__init
rbtx4927_pci_map_irq
(
const
struct
pci_dev
*
dev
,
u8
slot
,
u8
pin
)
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{
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unsigned
char
irq
=
pin
;
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/* IRQ rotation */
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irq--;
/* 0-3 */
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if
(slot ==
TX4927_PCIC_IDSEL_AD_TO_SLOT
(23)) {
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/* PCI CardSlot (IDSEL=A23) */
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/* PCIA => PCIA */
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irq = (irq + 0 +
slot
) % 4;
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}
else
{
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/* PCI Backplane */
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if
(
txx9_pci_option
&
TXX9_PCI_OPT_PICMG
)
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irq = (irq + 33 -
slot
) % 4;
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else
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irq = (irq + 3 +
slot
) % 4;
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}
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irq++;
/* 1-4 */
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switch
(irq) {
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case
1:
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irq =
RBTX4927_IRQ_IOC_PCIA
;
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break
;
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case
2:
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irq =
RBTX4927_IRQ_IOC_PCIB
;
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break
;
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case
3:
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irq =
RBTX4927_IRQ_IOC_PCIC
;
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break
;
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case
4:
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irq =
RBTX4927_IRQ_IOC_PCID
;
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break
;
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}
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return
irq;
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}
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