Linux Kernel  3.7.1
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miccpt-pci.c
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1 /*
2  * arch/arm/mach-ixp4xx/miccpt-pci.c
3  *
4  * MICCPT board-level PCI initialization
5  *
6  * Copyright (C) 2002 Intel Corporation.
7  * Copyright (C) 2003-2004 MontaVista Software, Inc.
8  * Copyright (C) 2006 OMICRON electronics GmbH
9  *
10  * Author: Michael Jochum <[email protected]>
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License version 2 as
14  * published by the Free Software Foundation.
15  *
16  */
17 
18 #include <linux/kernel.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/irq.h>
23 #include <asm/mach/pci.h>
24 #include <asm/irq.h>
25 #include <mach/hardware.h>
26 #include <asm/mach-types.h>
27 
28 #define MAX_DEV 4
29 #define IRQ_LINES 4
30 
31 /* PCI controller GPIO to IRQ pin mappings */
32 #define INTA 1
33 #define INTB 2
34 #define INTC 3
35 #define INTD 4
36 
37 
39 {
45 }
46 
47 static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
48 {
49  static int pci_irq_table[IRQ_LINES] = {
54  };
55 
56  if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
57  return pci_irq_table[(slot + pin - 2) % 4];
58 
59  return -1;
60 }
61 
62 struct hw_pci miccpt_pci __initdata = {
63  .nr_controllers = 1,
64  .ops = &ixp4xx_ops,
65  .preinit = miccpt_pci_preinit,
66  .setup = ixp4xx_setup,
67  .map_irq = miccpt_map_irq,
68 };
69 
71 {
72  if (machine_is_miccpt())
73  pci_common_init(&miccpt_pci);
74  return 0;
75 }
76