arch/x86/platform/goldfish/goldfish.c

   1 /*
   2  * Copyright (C) 2007 Google, Inc.
   3  * Copyright (C) 2011 Intel, Inc.
   4  * Copyright (C) 2013 Intel, Inc.
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/irq.h>
  19 #include <linux/platform_device.h>
  20
  21 /*
  22  * Where in virtual device memory the IO devices (timers, system controllers
  23  * and so on)
  24  */
  25
  26 #define GOLDFISH_PDEV_BUS_BASE  (0xff001000)
  27 #define GOLDFISH_PDEV_BUS_END   (0xff7fffff)
  28 #define GOLDFISH_PDEV_BUS_IRQ   (4)
  29
  30 #define GOLDFISH_TTY_BASE       (0x2000)
  31
  32 static struct resource goldfish_pdev_bus_resources[] = {
  33         {
  34                 .start  = GOLDFISH_PDEV_BUS_BASE,
  35                 .end    = GOLDFISH_PDEV_BUS_END,
  36                 .flags  = IORESOURCE_MEM,
  37         },
  38         {
  39                 .start  = GOLDFISH_PDEV_BUS_IRQ,
  40                 .end    = GOLDFISH_PDEV_BUS_IRQ,
  41                 .flags  = IORESOURCE_IRQ,
  42         }
  43 };
  44
  45 static bool goldfish_enable __initdata;
  46
  47 static int __init goldfish_setup(char *str)
  48 {
  49         goldfish_enable = true;
  50         return 0;
  51 }
  52 __setup("goldfish", goldfish_setup);
  53
  54 static int __init goldfish_init(void)
  55 {
  56         if (!goldfish_enable)
  57                 return -ENODEV;
  58
  59         platform_device_register_simple("goldfish_pdev_bus", -1,
  60                                         goldfish_pdev_bus_resources, 2);
  61         return 0;
  62 }
  63 device_initcall(goldfish_init);