arch/x86/platform/goldfish/goldfish.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2007 Google, Inc.
   4  * Copyright (C) 2011 Intel, Inc.
   5  * Copyright (C) 2013 Intel, Inc.
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/irq.h>
  10 #include <linux/platform_device.h>
  11
  12 /*
  13  * Where in virtual device memory the IO devices (timers, system controllers
  14  * and so on)
  15  */
  16
  17 #define GOLDFISH_PDEV_BUS_BASE  (0xff001000)
  18 #define GOLDFISH_PDEV_BUS_END   (0xff7fffff)
  19 #define GOLDFISH_PDEV_BUS_IRQ   (4)
  20
  21 #define GOLDFISH_TTY_BASE       (0x2000)
  22
  23 static struct resource goldfish_pdev_bus_resources[] = {
  24         {
  25                 .start  = GOLDFISH_PDEV_BUS_BASE,
  26                 .end    = GOLDFISH_PDEV_BUS_END,
  27                 .flags  = IORESOURCE_MEM,
  28         },
  29         {
  30                 .start  = GOLDFISH_PDEV_BUS_IRQ,
  31                 .end    = GOLDFISH_PDEV_BUS_IRQ,
  32                 .flags  = IORESOURCE_IRQ,
  33         }
  34 };
  35
  36 static bool goldfish_enable __initdata;
  37
  38 static int __init goldfish_setup(char *str)
  39 {
  40         goldfish_enable = true;
  41         return 0;
  42 }
  43 __setup("goldfish", goldfish_setup);
  44
  45 static int __init goldfish_init(void)
  46 {
  47         if (!goldfish_enable)
  48                 return -ENODEV;
  49
  50         platform_device_register_simple("goldfish_pdev_bus", -1,
  51                                         goldfish_pdev_bus_resources, 2);
  52         return 0;
  53 }
  54 device_initcall(goldfish_init);