1/*
 2 *
 3 * BRIEF MODULE DESCRIPTION
 4 *	Board specific pci fixups.
 5 *
 6 * Copyright 2001 MontaVista Software Inc.
 7 * Author: MontaVista Software, Inc.
 8 *         	ppopov@mvista.com or source@mvista.com
 9 *
10 *  This program is free software; you can redistribute  it and/or modify it
11 *  under  the terms of  the GNU General  Public License as published by the
12 *  Free Software Foundation;  either version 2 of the  License, or (at your
13 *  option) any later version.
14 *
15 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
16 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
17 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
18 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
19 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
21 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
22 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
23 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 *  You should have received a copy of the  GNU General Public License along
27 *  with this program; if not, write  to the Free Software Foundation, Inc.,
28 *  675 Mass Ave, Cambridge, MA 02139, USA.
29 */
30#include <linux/types.h>
31#include <asm/txx9/pci.h>
32#include <asm/txx9/jmr3927.h>
33
34int __init jmr3927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
35{
36	unsigned char irq = pin;
37
38	/* IRQ rotation (PICMG) */
39	irq--;			/* 0-3 */
40	if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) {
41		/* PCI CardSlot (IDSEL=A23, DevNu=12) */
42		/* PCIA => PCIC (IDSEL=A23) */
43		/* NOTE: JMR3927 JP1 must be set to OPEN */
44		irq = (irq + 2) % 4;
45	} else if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) {
46		/* PCI CardSlot (IDSEL=A22, DevNu=11) */
47		/* PCIA => PCIA (IDSEL=A22) */
48		/* NOTE: JMR3927 JP1 must be set to OPEN */
49		irq = (irq + 0) % 4;
50	} else {
51		/* PCI Backplane */
52		if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
53			irq = (irq + 33 - slot) % 4;
54		else
55			irq = (irq + 3 + slot) % 4;
56	}
57	irq++;			/* 1-4 */
58
59	switch (irq) {
60	case 1:
61		irq = JMR3927_IRQ_IOC_PCIA;
62		break;
63	case 2:
64		irq = JMR3927_IRQ_IOC_PCIB;
65		break;
66	case 3:
67		irq = JMR3927_IRQ_IOC_PCIC;
68		break;
69	case 4:
70		irq = JMR3927_IRQ_IOC_PCID;
71		break;
72	}
73
74	/* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */
75	if (dev->bus->parent == NULL &&
76	    slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(24))
77		irq = JMR3927_IRQ_ETHER0;
78	return irq;
79}