release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/vr41xx/common/giu.c

   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
  29 static 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
  47 static 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
  60 static 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
  73 static 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
 117 err_free_device:
 118         platform_device_put(pdev);
 119
 120         return retval;
 121 }
 122 device_initcall(vr41xx_giu_add);