linux/arch/mips/vr41xx/common/giu.c
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   1/*
   2 *  NEC VR4100 series GIU platform device.
   3 *
   4 *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms of the GNU General Public License as published by
   8 *  the Free Software Foundation; either version 2 of the License, or
   9 *  (at your option) any later version.
  10 *
  11 *  This program is distributed in the hope that it will be useful,
  12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *  GNU General Public License for more details.
  15 *
  16 *  You should have received a copy of the GNU General Public License
  17 *  along with this program; if not, write to the Free Software
  18 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19 */
  20#include <linux/errno.h>
  21#include <linux/init.h>
  22#include <linux/ioport.h>
  23#include <linux/platform_device.h>
  24
  25#include <asm/cpu.h>
  26#include <asm/vr41xx/giu.h>
  27#include <asm/vr41xx/irq.h>
  28
  29static struct resource giu_50pins_pullupdown_resource[] __initdata = {
  30        {
  31                .start  = 0x0b000100,
  32                .end    = 0x0b00011f,
  33                .flags  = IORESOURCE_MEM,
  34        },
  35        {
  36                .start  = 0x0b0002e0,
  37                .end    = 0x0b0002e3,
  38                .flags  = IORESOURCE_MEM,
  39        },
  40        {
  41                .start  = GIUINT_IRQ,
  42                .end    = GIUINT_IRQ,
  43                .flags  = IORESOURCE_IRQ,
  44        },
  45};
  46
  47static struct resource giu_36pins_resource[] __initdata = {
  48        {
  49                .start  = 0x0f000140,
  50                .end    = 0x0f00015f,
  51                .flags  = IORESOURCE_MEM,
  52        },
  53        {
  54                .start  = GIUINT_IRQ,
  55                .end    = GIUINT_IRQ,
  56                .flags  = IORESOURCE_IRQ,
  57        },
  58};
  59
  60static struct resource giu_48pins_resource[] __initdata = {
  61        {
  62                .start  = 0x0f000140,
  63                .end    = 0x0f000167,
  64                .flags  = IORESOURCE_MEM,
  65        },
  66        {
  67                .start  = GIUINT_IRQ,
  68                .end    = GIUINT_IRQ,
  69                .flags  = IORESOURCE_IRQ,
  70        },
  71};
  72
  73static int __init vr41xx_giu_add(void)
  74{
  75        struct platform_device *pdev;
  76        struct resource *res;
  77        unsigned int num;
  78        int retval;
  79
  80        pdev = platform_device_alloc("GIU", -1);
  81        if (!pdev)
  82                return -ENOMEM;
  83
  84        switch (current_cpu_type()) {
  85        case CPU_VR4111:
  86        case CPU_VR4121:
  87                pdev->id = GPIO_50PINS_PULLUPDOWN;
  88                res = giu_50pins_pullupdown_resource;
  89                num = ARRAY_SIZE(giu_50pins_pullupdown_resource);
  90                break;
  91        case CPU_VR4122:
  92        case CPU_VR4131:
  93                pdev->id = GPIO_36PINS;
  94                res = giu_36pins_resource;
  95                num = ARRAY_SIZE(giu_36pins_resource);
  96                break;
  97        case CPU_VR4133:
  98                pdev->id = GPIO_48PINS_EDGE_SELECT;
  99                res = giu_48pins_resource;
 100                num = ARRAY_SIZE(giu_48pins_resource);
 101                break;
 102        default:
 103                retval = -ENODEV;
 104                goto err_free_device;
 105        }
 106
 107        retval = platform_device_add_resources(pdev, res, num);
 108        if (retval)
 109                goto err_free_device;
 110
 111        retval = platform_device_add(pdev);
 112        if (retval)
 113                goto err_free_device;
 114
 115        return 0;
 116
 117err_free_device:
 118        platform_device_put(pdev);
 119
 120        return retval;
 121}
 122device_initcall(vr41xx_giu_add);
 123