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1da177e4 LT |
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 | * | |
42a3b4f2 | 10 | * Copyright (C) 2000-2001 Toshiba Corporation |
1da177e4 LT |
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> | |
89d63fe1 AN |
36 | #include <asm/txx9/pci.h> |
37 | #include <asm/txx9/rbtx4927.h> | |
1da177e4 | 38 | |
edcaf1a6 | 39 | int __init rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
1da177e4 LT |
40 | { |
41 | unsigned char irq = pin; | |
42 | ||
1da177e4 LT |
43 | /* IRQ rotation */ |
44 | irq--; /* 0-3 */ | |
89d63fe1 AN |
45 | if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { |
46 | /* PCI CardSlot (IDSEL=A23) */ | |
47 | /* PCIA => PCIA */ | |
48 | irq = (irq + 0 + slot) % 4; | |
1da177e4 LT |
49 | } else { |
50 | /* PCI Backplane */ | |
89d63fe1 AN |
51 | if (txx9_pci_option & TXX9_PCI_OPT_PICMG) |
52 | irq = (irq + 33 - slot) % 4; | |
53 | else | |
54 | irq = (irq + 3 + slot) % 4; | |
1da177e4 | 55 | } |
89d63fe1 | 56 | irq++; /* 1-4 */ |
1da177e4 | 57 | |
89d63fe1 AN |
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 | } | |
1da177e4 LT |
72 | return irq; |
73 | } |