LXR linux/arch/arm/mach-orion5x/board-rd88f5182.c

   1/*
   2 * arch/arm/mach-orion5x/rd88f5182-setup.c
   3 *
   4 * Marvell Orion-NAS Reference Design Setup
   5 *
   6 * Maintainer: Ronen Shitrit <rshitrit@marvell.com>
   7 *
   8 * This file is licensed under the terms of the GNU General Public
   9 * License version 2.  This program is licensed "as is" without any
  10 * warranty of any kind, whether express or implied.
  11 */
  12#include <linux/gpio.h>
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/platform_device.h>
  16#include <linux/pci.h>
  17#include <linux/irq.h>
  18#include <asm/mach-types.h>
  19#include <asm/mach/arch.h>
  20#include <asm/mach/pci.h>
  21#include "common.h"
  22#include "orion5x.h"
  23
  24/*****************************************************************************
  25 * RD-88F5182 Info
  26 ****************************************************************************/
  27
  28/*
  29 * PCI
  30 */
  31
  32#define RD88F5182_PCI_SLOT0_OFFS        7
  33#define RD88F5182_PCI_SLOT0_IRQ_A_PIN   7
  34#define RD88F5182_PCI_SLOT0_IRQ_B_PIN   6
  35
  36/*****************************************************************************
  37 * PCI
  38 ****************************************************************************/
  39
  40static void __init rd88f5182_pci_preinit(void)
  41{
  42        int pin;
  43
  44        /*
  45         * Configure PCI GPIO IRQ pins
  46         */
  47        pin = RD88F5182_PCI_SLOT0_IRQ_A_PIN;
  48        if (gpio_request(pin, "PCI IntA") == 0) {
  49                if (gpio_direction_input(pin) == 0) {
  50                        irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
  51                } else {
  52                        printk(KERN_ERR "rd88f5182_pci_preinit failed to "
  53                                        "set_irq_type pin %d\n", pin);
  54                        gpio_free(pin);
  55                }
  56        } else {
  57                printk(KERN_ERR "rd88f5182_pci_preinit failed to request gpio %d\n", pin);
  58        }
  59
  60        pin = RD88F5182_PCI_SLOT0_IRQ_B_PIN;
  61        if (gpio_request(pin, "PCI IntB") == 0) {
  62                if (gpio_direction_input(pin) == 0) {
  63                        irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
  64                } else {
  65                        printk(KERN_ERR "rd88f5182_pci_preinit failed to "
  66                                        "set_irq_type pin %d\n", pin);
  67                        gpio_free(pin);
  68                }
  69        } else {
  70                printk(KERN_ERR "rd88f5182_pci_preinit failed to gpio_request %d\n", pin);
  71        }
  72}
  73
  74static int __init rd88f5182_pci_map_irq(const struct pci_dev *dev, u8 slot,
  75        u8 pin)
  76{
  77        int irq;
  78
  79        /*
  80         * Check for devices with hard-wired IRQs.
  81         */
  82        irq = orion5x_pci_map_irq(dev, slot, pin);
  83        if (irq != -1)
  84                return irq;
  85
  86        /*
  87         * PCI IRQs are connected via GPIOs
  88         */
  89        switch (slot - RD88F5182_PCI_SLOT0_OFFS) {
  90        case 0:
  91                if (pin == 1)
  92                        return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_A_PIN);
  93                else
  94                        return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_B_PIN);
  95        default:
  96                return -1;
  97        }
  98}
  99
 100static struct hw_pci rd88f5182_pci __initdata = {
 101        .nr_controllers = 2,
 102        .preinit        = rd88f5182_pci_preinit,
 103        .setup          = orion5x_pci_sys_setup,
 104        .scan           = orion5x_pci_sys_scan_bus,
 105        .map_irq        = rd88f5182_pci_map_irq,
 106};
 107
 108static int __init rd88f5182_pci_init(void)
 109{
 110        if (of_machine_is_compatible("marvell,rd-88f5182-nas"))
 111                pci_common_init(&rd88f5182_pci);
 112
 113        return 0;
 114}
 115
 116subsys_initcall(rd88f5182_pci_init);
 117