arch/arm/mach-ixp4xx/coyote-pci.c

   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
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/init.h>
  16 #include <linux/irq.h>
  17 #include <asm/mach-types.h>
  18 #include <mach/hardware.h>
  19 #include <asm/irq.h>
  20 #include <asm/mach/pci.h>
  21
  22 #include "irqs.h"
  23
  24 #define SLOT0_DEVID     14
  25 #define SLOT1_DEVID     15
  26
  27 /* PCI controller GPIO to IRQ pin mappings */
  28 #define SLOT0_INTA      6
  29 #define SLOT1_INTA      11
  30
  31 void __init coyote_pci_preinit(void)
  32 {
  33         irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT0_INTA), IRQ_TYPE_LEVEL_LOW);
  34         irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT1_INTA), IRQ_TYPE_LEVEL_LOW);
  35         ixp4xx_pci_preinit();
  36 }
  37
  38 static int __init coyote_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  39 {
  40         if (slot == SLOT0_DEVID)
  41                 return IXP4XX_GPIO_IRQ(SLOT0_INTA);
  42         else if (slot == SLOT1_DEVID)
  43                 return IXP4XX_GPIO_IRQ(SLOT1_INTA);
  44         else return -1;
  45 }
  46
  47 struct hw_pci coyote_pci __initdata = {
  48         .nr_controllers = 1,
  49         .ops            = &ixp4xx_ops,
  50         .preinit =        coyote_pci_preinit,
  51         .setup =          ixp4xx_setup,
  52         .map_irq =        coyote_map_irq,
  53 };
  54
  55 int __init coyote_pci_init(void)
  56 {
  57         if (machine_is_adi_coyote())
  58                 pci_common_init(&coyote_pci);
  59         return 0;
  60 }
  61
  62 subsys_initcall(coyote_pci_init);