root/arch/arm/mach-ixp4xx/ixdp425-pci.c

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DEFINITIONS

This source file includes following definitions.
  1. ixdp425_pci_preinit
  2. ixdp425_map_irq
  3. ixdp425_pci_init

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/mach-ixp4xx/ixdp425-pci.c
   4  *
   5  * IXDP425 board-level PCI initialization
   6  *
   7  * Copyright (C) 2002 Intel Corporation.
   8  * Copyright (C) 2003-2004 MontaVista Software, Inc.
   9  *
  10  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
  11  */
  12 
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/init.h>
  16 #include <linux/irq.h>
  17 #include <linux/delay.h>
  18 #include <asm/mach/pci.h>
  19 #include <asm/irq.h>
  20 #include <mach/hardware.h>
  21 #include <asm/mach-types.h>
  22 
  23 #include "irqs.h"
  24 
  25 #define MAX_DEV         4
  26 #define IRQ_LINES       4
  27 
  28 /* PCI controller GPIO to IRQ pin mappings */
  29 #define INTA            11
  30 #define INTB            10
  31 #define INTC            9
  32 #define INTD            8
  33 
  34 
  35 void __init ixdp425_pci_preinit(void)
  36 {
  37         irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  38         irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  39         irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
  40         irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
  41         ixp4xx_pci_preinit();
  42 }
  43 
  44 static int __init ixdp425_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  45 {
  46         static int pci_irq_table[IRQ_LINES] = {
  47                 IXP4XX_GPIO_IRQ(INTA),
  48                 IXP4XX_GPIO_IRQ(INTB),
  49                 IXP4XX_GPIO_IRQ(INTC),
  50                 IXP4XX_GPIO_IRQ(INTD)
  51         };
  52 
  53         if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
  54                 return pci_irq_table[(slot + pin - 2) % 4];
  55 
  56         return -1;
  57 }
  58 
  59 struct hw_pci ixdp425_pci __initdata = {
  60         .nr_controllers = 1,
  61         .ops            = &ixp4xx_ops,
  62         .preinit        = ixdp425_pci_preinit,
  63         .setup          = ixp4xx_setup,
  64         .map_irq        = ixdp425_map_irq,
  65 };
  66 
  67 int __init ixdp425_pci_init(void)
  68 {
  69         if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
  70                         machine_is_ixdp465() || machine_is_kixrp435())
  71                 pci_common_init(&ixdp425_pci);
  72         return 0;
  73 }
  74 
  75 subsys_initcall(ixdp425_pci_init);

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