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mach-ixp4xx
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dsmg600-pci.c

dsmg600-pci.c 2.0 KB
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  1. /*
    2. 

  2.  * DSM-G600 board-level PCI initialization
    3. 

  3.  *
    4. 

  4.  * Copyright (C) 2006 Tower Technologies
    5. 

  5.  * Author: Alessandro Zummo <a.zummo@towertech.it>
    6. 

  6.  *
    7. 

  7.  * based on ixdp425-pci.c:
    8. 

  8.  *	Copyright (C) 2002 Intel Corporation.
    9. 

  9.  *	Copyright (C) 2003-2004 MontaVista Software, Inc.
    10. 

  10.  *
    11. 

  11.  * Maintainer: http://www.nslu2-linux.org/
    12. 

  12.  *
    13. 

  13.  * This program is free software; you can redistribute it and/or modify
    14. 

  14.  * it under the terms of the GNU General Public License version 2 as
    15. 

  15.  * published by the Free Software Foundation.
    16. 

  16.  *
    17. 

  17.  */
    18. 

  18. 

  19. #include <linux/pci.h>
    20. 

  20. #include <linux/init.h>
    21. 

  21. #include <linux/irq.h>
    22. 

  22. #include <asm/mach/pci.h>
    23. 

  23. #include <asm/mach-types.h>
    24. 

  24. 

  25. #define MAX_DEV		4
    26. 

  26. #define IRQ_LINES	3
    27. 

  27. 

  28. /* PCI controller GPIO to IRQ pin mappings */
    29. 

  29. #define INTA		11
    30. 

  30. #define INTB		10
    31. 

  31. #define INTC		9
    32. 

  32. #define INTD		8
    33. 

  33. #define INTE		7
    34. 

  34. #define INTF		6
    35. 

  35. 

  36. void __init dsmg600_pci_preinit(void)
    37. 

  37. {
    38. 

  38. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
    39. 

  39. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
    40. 

  40. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
    41. 

  41. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
    42. 

  42. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
    43. 

  43. 	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTF), IRQ_TYPE_LEVEL_LOW);
    44. 

  44. 	ixp4xx_pci_preinit();
    45. 

  45. }
    46. 

  46. 

  47. static int __init dsmg600_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
    48. 

  48. {
    49. 

  49. 	static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
    50. 

  50. 		{ IXP4XX_GPIO_IRQ(INTE), -1, -1 },
    51. 

  51. 		{ IXP4XX_GPIO_IRQ(INTA), -1, -1 },
    52. 

  52. 		{ IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC),
    53. 

  53. 		  IXP4XX_GPIO_IRQ(INTD) },
    54. 

  54. 		{ IXP4XX_GPIO_IRQ(INTF), -1, -1 },
    55. 

  55. 	};
    56. 

  56. 

  57. 	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
    58. 

  58. 		return pci_irq_table[slot - 1][pin - 1];
    59. 

  59. 

  60. 	return -1;
    61. 

  61. }
    62. 

  62. 

  63. struct hw_pci __initdata dsmg600_pci = {
    64. 

  64. 	.nr_controllers = 1,
    65. 

  65. 	.preinit	= dsmg600_pci_preinit,
    66. 

  66. 	.swizzle	= pci_std_swizzle,
    67. 

  67. 	.setup		= ixp4xx_setup,
    68. 

  68. 	.scan		= ixp4xx_scan_bus,
    69. 

  69. 	.map_irq	= dsmg600_map_irq,
    70. 

  70. };
    71. 

  71. 

  72. int __init dsmg600_pci_init(void)
    73. 

  73. {
    74. 

  74. 	if (machine_is_dsmg600())
    75. 

  75. 		pci_common_init(&dsmg600_pci);
    76. 

  76. 

  77. 	return 0;
    78. 

  78. }
    79. 

  79. 

  80. subsys_initcall(dsmg600_pci_init);
    81. 

  81.