arch/arm/mach-ixp4xx/ess710-pci.c

   1 /*
   2  * arch/arm/mach-ixp4xx/ixdp425-pci.c
   3  *
   4  * ESS710 board-level PCI initialization
   5  * Copyright (C) 2004 SnapGear - A CyberGuard Company
   6  *
   7  * Copyright (C) 2002 Intel Corporation.
   8  * Copyright (C) 2003-2004 MontaVista Software, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15
  16 #include <linux/pci.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/irq.h>
  20 #include <asm/mach/pci.h>
  21 #include <asm/irq.h>
  22 #include <asm/hardware.h>
  23 #include <asm/mach-types.h>
  24
  25 void __init ess710_pci_preinit(void)
  26 {
  27         printk("PCI: reset bus...\n");
  28         gpio_line_set(13, 0);
  29         gpio_line_config(13, IXP4XX_GPIO_OUT);
  30         gpio_line_set(13, 0);
  31         mdelay(50);
  32         gpio_line_set(13, 1);
  33         mdelay(50);
  34
  35         gpio_line_config(6, IXP4XX_GPIO_IN);
  36         set_irq_type(IRQ_IXP4XX_GPIO6, IRQT_LOW); /* INTA */
  37         gpio_line_config(7, IXP4XX_GPIO_IN);
  38         set_irq_type(IRQ_IXP4XX_GPIO7, IRQT_LOW); /* INTB */
  39         gpio_line_config(8, IXP4XX_GPIO_IN);
  40         set_irq_type(IRQ_IXP4XX_GPIO8, IRQT_LOW); /* INTC */
  41
  42         ixp4xx_pci_preinit();
  43 }
  44
  45 static int __init ess710_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  46 {
  47         if (slot == 16)
  48                 return IRQ_ESS710_PCI_INTA;
  49         else if (slot == 15)
  50                 return IRQ_ESS710_PCI_INTB;
  51         else if (slot == 14)
  52                 return IRQ_ESS710_PCI_INTC;
  53         else if (slot == 13)
  54                 return IRQ_ESS710_PCI_INTC;
  55         return -1;
  56 }
  57
  58 struct hw_pci ess710_pci __initdata = {
  59         .nr_controllers = 1,
  60         .preinit        = ess710_pci_preinit,
  61         .swizzle        = pci_std_swizzle,
  62         .setup          = ixp4xx_setup,
  63         .scan           = ixp4xx_scan_bus,
  64         .map_irq        = ess710_map_irq,
  65 };
  66
  67 int __init ess710_pci_init(void)
  68 {
  69         if (machine_is_ess710())
  70                 pci_common_init(&ess710_pci);
  71         return 0;
  72 }
  73
  74 subsys_initcall(ess710_pci_init);
  75