coyote-pci.c 1.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * arch/arm/mach-ixp4xx/coyote-pci.c
  4. *
  5. * PCI setup routines for ADI Engineering Coyote platform
  6. *
  7. * Copyright (C) 2002 Jungo Software Technologies.
  8. * Copyright (C) 2003 MontaVista Softwrae, Inc.
  9. *
  10. * Maintainer: Deepak Saxena <dsaxena@mvista.com>
  11. */
  12. #include <linux/kernel.h>
  13. #include <linux/pci.h>
  14. #include <linux/init.h>
  15. #include <linux/irq.h>
  16. #include <asm/mach-types.h>
  17. #include <mach/hardware.h>
  18. #include <asm/irq.h>
  19. #include <asm/mach/pci.h>
  20. #include "irqs.h"
  21. #define SLOT0_DEVID 14
  22. #define SLOT1_DEVID 15
  23. /* PCI controller GPIO to IRQ pin mappings */
  24. #define SLOT0_INTA 6
  25. #define SLOT1_INTA 11
  26. void __init coyote_pci_preinit(void)
  27. {
  28. irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT0_INTA), IRQ_TYPE_LEVEL_LOW);
  29. irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT1_INTA), IRQ_TYPE_LEVEL_LOW);
  30. ixp4xx_pci_preinit();
  31. }
  32. static int __init coyote_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  33. {
  34. if (slot == SLOT0_DEVID)
  35. return IXP4XX_GPIO_IRQ(SLOT0_INTA);
  36. else if (slot == SLOT1_DEVID)
  37. return IXP4XX_GPIO_IRQ(SLOT1_INTA);
  38. else return -1;
  39. }
  40. struct hw_pci coyote_pci __initdata = {
  41. .nr_controllers = 1,
  42. .ops = &ixp4xx_ops,
  43. .preinit = coyote_pci_preinit,
  44. .setup = ixp4xx_setup,
  45. .map_irq = coyote_map_irq,
  46. };
  47. int __init coyote_pci_init(void)
  48. {
  49. if (machine_is_adi_coyote())
  50. pci_common_init(&coyote_pci);
  51. return 0;
  52. }
  53. subsys_initcall(coyote_pci_init);