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review.evervolv.com / android_kernel_htc_msm8960 / f6c903f5856ffa75ae19dcee4dbb5093e320d45c / . / arch / mips / pci / fixup-rbtx4938.c
blob: a80579af609bc7155f86836a3e4f0e8ed457e7d3 [file] [log] [blame]
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]1/*
2 * Toshiba rbtx4938 pci routines
3 * Copyright (C) 2000-2001 Toshiba Corporation
4 *
5 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
6 * terms of the GNU General Public License version 2. This program is
7 * licensed "as is" without any warranty of any kind, whether express
8 * or implied.
9 *
10 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
11 */
12#include <linux/types.h>
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]13#include <asm/txx9/pci.h>
Atsushi Nemoto22b1d702008-07-11 00:31:36 +0900[diff] [blame]14#include <asm/txx9/rbtx4938.h>
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]15
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900[diff] [blame]16int __init rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]17{
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]18 int irq = tx4938_pcic1_map_irq(dev, slot);
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]19
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]20 if (irq >= 0)
21 return irq;
22 irq = pin;
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]23 /* IRQ rotation */
24 irq--; /* 0-3 */
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]25 if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]26 /* PCI CardSlot (IDSEL=A23) */
27 /* PCIA => PCIA (IDSEL=A23) */
28 irq = (irq + 0 + slot) % 4;
29 } else {
30 /* PCI Backplane */
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]31 if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
32 irq = (irq + 33 - slot) % 4;
33 else
34 irq = (irq + 3 + slot) % 4;
Ralf Baechle23fbee92005-07-25 22:45:45 +0000[diff] [blame]35 }
36 irq++; /* 1-4 */
37
38 switch (irq) {
39 case 1:
40 irq = RBTX4938_IRQ_IOC_PCIA;
41 break;
42 case 2:
43 irq = RBTX4938_IRQ_IOC_PCIB;
44 break;
45 case 3:
46 irq = RBTX4938_IRQ_IOC_PCIC;
47 break;
48 case 4:
49 irq = RBTX4938_IRQ_IOC_PCID;
50 break;
51 }
52 return irq;
53}