1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun *
3*4882a593Smuzhiyun * BRIEF MODULE DESCRIPTION
4*4882a593Smuzhiyun * Board specific pci fixups for the Toshiba rbtx4927
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright 2001 MontaVista Software Inc.
7*4882a593Smuzhiyun * Author: MontaVista Software, Inc.
8*4882a593Smuzhiyun * ppopov@mvista.com or source@mvista.com
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Copyright (C) 2000-2001 Toshiba Corporation
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * Copyright (C) 2004 MontaVista Software Inc.
13*4882a593Smuzhiyun * Author: Manish Lachwani (mlachwani@mvista.com)
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify it
16*4882a593Smuzhiyun * under the terms of the GNU General Public License as published by the
17*4882a593Smuzhiyun * Free Software Foundation; either version 2 of the License, or (at your
18*4882a593Smuzhiyun * option) any later version.
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21*4882a593Smuzhiyun * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22*4882a593Smuzhiyun * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23*4882a593Smuzhiyun * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24*4882a593Smuzhiyun * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25*4882a593Smuzhiyun * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26*4882a593Smuzhiyun * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27*4882a593Smuzhiyun * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28*4882a593Smuzhiyun * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29*4882a593Smuzhiyun * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30*4882a593Smuzhiyun *
31*4882a593Smuzhiyun * You should have received a copy of the GNU General Public License along
32*4882a593Smuzhiyun * with this program; if not, write to the Free Software Foundation, Inc.,
33*4882a593Smuzhiyun * 675 Mass Ave, Cambridge, MA 02139, USA.
34*4882a593Smuzhiyun */
35*4882a593Smuzhiyun #include <linux/types.h>
36*4882a593Smuzhiyun #include <asm/txx9/pci.h>
37*4882a593Smuzhiyun #include <asm/txx9/rbtx4927.h>
38*4882a593Smuzhiyun
rbtx4927_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)39*4882a593Smuzhiyun int rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun unsigned char irq = pin;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun /* IRQ rotation */
44*4882a593Smuzhiyun irq--; /* 0-3 */
45*4882a593Smuzhiyun if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
46*4882a593Smuzhiyun /* PCI CardSlot (IDSEL=A23) */
47*4882a593Smuzhiyun /* PCIA => PCIA */
48*4882a593Smuzhiyun irq = (irq + 0 + slot) % 4;
49*4882a593Smuzhiyun } else {
50*4882a593Smuzhiyun /* PCI Backplane */
51*4882a593Smuzhiyun if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
52*4882a593Smuzhiyun irq = (irq + 33 - slot) % 4;
53*4882a593Smuzhiyun else
54*4882a593Smuzhiyun irq = (irq + 3 + slot) % 4;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun irq++; /* 1-4 */
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun switch (irq) {
59*4882a593Smuzhiyun case 1:
60*4882a593Smuzhiyun irq = RBTX4927_IRQ_IOC_PCIA;
61*4882a593Smuzhiyun break;
62*4882a593Smuzhiyun case 2:
63*4882a593Smuzhiyun irq = RBTX4927_IRQ_IOC_PCIB;
64*4882a593Smuzhiyun break;
65*4882a593Smuzhiyun case 3:
66*4882a593Smuzhiyun irq = RBTX4927_IRQ_IOC_PCIC;
67*4882a593Smuzhiyun break;
68*4882a593Smuzhiyun case 4:
69*4882a593Smuzhiyun irq = RBTX4927_IRQ_IOC_PCID;
70*4882a593Smuzhiyun break;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun return irq;
73*4882a593Smuzhiyun }
74