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/arch/mips/pci/fixup-rbtx4927.c

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C | 73 lines | 32 code | 3 blank | 38 comment | 5 complexity | 9e2d5a3b15150d9fddcd711140aaf8ca MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/*
 2 *
 3 * BRIEF MODULE DESCRIPTION
 4 *      Board specific pci fixups for the Toshiba rbtx4927
 5 *
 6 * Copyright 2001 MontaVista Software Inc.
 7 * Author: MontaVista Software, Inc.
 8 *              ppopov@mvista.com or source@mvista.com
 9 *
10 * Copyright (C) 2000-2001 Toshiba Corporation
11 *
12 * Copyright (C) 2004 MontaVista Software Inc.
13 * Author: Manish Lachwani (mlachwani@mvista.com)
14 *
15 *  This program is free software; you can redistribute  it and/or modify it
16 *  under  the terms of  the GNU General  Public License as published by the
17 *  Free Software Foundation;  either version 2 of the  License, or (at your
18 *  option) any later version.
19 *
20 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
21 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
22 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
23 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
24 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
26 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
28 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 *  You should have received a copy of the  GNU General Public License along
32 *  with this program; if not, write  to the Free Software Foundation, Inc.,
33 *  675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35#include <linux/types.h>
36#include <asm/txx9/pci.h>
37#include <asm/txx9/rbtx4927.h>
38
39int __init rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
40{
41	unsigned char irq = pin;
42
43	/* IRQ rotation */
44	irq--;			/* 0-3 */
45	if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
46		/* PCI CardSlot (IDSEL=A23) */
47		/* PCIA => PCIA */
48		irq = (irq + 0 + slot) % 4;
49	} else {
50		/* PCI Backplane */
51		if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
52			irq = (irq + 33 - slot) % 4;
53		else
54			irq = (irq + 3 + slot) % 4;
55	}
56	irq++;	/* 1-4 */
57
58	switch (irq) {
59	case 1:
60		irq = RBTX4927_IRQ_IOC_PCIA;
61		break;
62	case 2:
63		irq = RBTX4927_IRQ_IOC_PCIB;
64		break;
65	case 3:
66		irq = RBTX4927_IRQ_IOC_PCIC;
67		break;
68	case 4:
69		irq = RBTX4927_IRQ_IOC_PCID;
70		break;
71	}
72	return irq;
73}