gtwx5715-pci.c 1.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * arch/arm/mach-ixp4xx/gtwx5715-pci.c
  4. *
  5. * Gemtek GTWX5715 (Linksys WRV54G) board setup
  6. *
  7. * Copyright (C) 2004 George T. Joseph
  8. * Derived from Coyote
  9. */
  10. #include <linux/pci.h>
  11. #include <linux/init.h>
  12. #include <linux/delay.h>
  13. #include <linux/irq.h>
  14. #include <asm/mach-types.h>
  15. #include <mach/hardware.h>
  16. #include <asm/mach/pci.h>
  17. #include "irqs.h"
  18. #define SLOT0_DEVID 0
  19. #define SLOT1_DEVID 1
  20. #define INTA 10 /* slot 1 has INTA and INTB crossed */
  21. #define INTB 11
  22. /*
  23. * Slot 0 isn't actually populated with a card connector but
  24. * we initialize it anyway in case a future version has the
  25. * slot populated or someone with good soldering skills has
  26. * some free time.
  27. */
  28. void __init gtwx5715_pci_preinit(void)
  29. {
  30. irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  31. irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  32. ixp4xx_pci_preinit();
  33. }
  34. static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  35. {
  36. int rc = -1;
  37. if ((slot == SLOT0_DEVID && pin == 1) ||
  38. (slot == SLOT1_DEVID && pin == 2))
  39. rc = IXP4XX_GPIO_IRQ(INTA);
  40. else if ((slot == SLOT0_DEVID && pin == 2) ||
  41. (slot == SLOT1_DEVID && pin == 1))
  42. rc = IXP4XX_GPIO_IRQ(INTB);
  43. printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
  44. __func__, slot, pin, rc);
  45. return rc;
  46. }
  47. struct hw_pci gtwx5715_pci __initdata = {
  48. .nr_controllers = 1,
  49. .ops = &ixp4xx_ops,
  50. .preinit = gtwx5715_pci_preinit,
  51. .setup = ixp4xx_setup,
  52. .map_irq = gtwx5715_map_irq,
  53. };
  54. int __init gtwx5715_pci_init(void)
  55. {
  56. if (machine_is_gtwx5715())
  57. pci_common_init(&gtwx5715_pci);
  58. return 0;
  59. }
  60. subsys_initcall(gtwx5715_pci_init);