target/linux/x86/patches-3.2/001-alix_platform.patch

   1 index dc5f1d3..a24bf8c 100644
   2 --- a/arch/x86/platform/geode/alix.c
   3 +++ b/arch/x86/platform/geode/alix.c
   4 @@ -6,6 +6,7 @@
   5   *
   6   * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
   7   * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
   8 + *                and Philip Prindeville <philipp@redfish-solutions.com>
   9   *
  10   * TODO: There are large similarities with leds-net5501.c
  11   * by Alessandro Zummo <a.zummo@towertech.it>
  12 @@ -24,14 +25,47 @@
  13  #include <linux/leds.h>
  14  #include <linux/platform_device.h>
  15  #include <linux/gpio.h>
  16 +#include <linux/input.h>
  17 +#include <linux/gpio_keys.h>
  18 +#include <linux/dmi.h>
  19
  20  #include <asm/geode.h>
  21
  22 -static int force = 0;
  23 +#define BIOS_SIGNATURE_TINYBIOS                0xf0000
  24 +#define BIOS_SIGNATURE_COREBOOT                0x500
  25 +#define BIOS_REGION_SIZE               0x10000
  26 +
  27 +static bool force = 0;
  28  module_param(force, bool, 0444);
  29  /* FIXME: Award bios is not automatically detected as Alix platform */
  30  MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
  31
  32 +static struct gpio_keys_button alix_gpio_buttons[] = {
  33 +       {
  34 +               .code = KEY_RESTART,
  35 +               .gpio = 24,
  36 +               .active_low = 1,
  37 +               .desc = "Reset button",
  38 +               .type = EV_KEY,
  39 +               .wakeup = 0,
  40 +               .debounce_interval = 100,
  41 +               .can_disable = 0,
  42 +       }
  43 +};
  44 +static struct gpio_keys_platform_data alix_buttons_data = {
  45 +       .buttons = alix_gpio_buttons,
  46 +       .nbuttons = ARRAY_SIZE(alix_gpio_buttons),
  47 +       .poll_interval = 20,
  48 +};
  49 +
  50 +static struct platform_device alix_buttons_dev = {
  51 +       .name = "gpio-keys-polled",
  52 +       .id = 1,
  53 +       .dev = {
  54 +               .platform_data = &alix_buttons_data,
  55 +       }
  56 +};
  57 +
  58  static struct gpio_led alix_leds[] = {
  59         {
  60                 .name = "alix:1",
  61 @@ -64,17 +98,22 @@ static struct platform_device alix_leds_
  62         .dev.platform_data = &alix_leds_data,
  63  };
  64
  65 +static struct __initdata platform_device *alix_devs[] = {
  66 +       &alix_buttons_dev,
  67 +       &alix_leds_dev,
  68 +};
  69 +
  70  static void __init register_alix(void)
  71  {
  72         /* Setup LED control through leds-gpio driver */
  73 -       platform_device_register(&alix_leds_dev);
  74 +       platform_add_devices(alix_devs, ARRAY_SIZE(alix_devs));
  75  }
  76
  77  static int __init alix_present(unsigned long bios_phys,
  78                                 const char *alix_sig,
  79                                 size_t alix_sig_len)
  80  {
  81 -       const size_t bios_len = 0x00010000;
  82 +       const size_t bios_len = BIOS_REGION_SIZE;
  83         const char *bios_virt;
  84         const char *scan_end;
  85         const char *p;
  86 @@ -109,7 +148,8 @@ static int __init alix_present(unsigned
  87                         *a = '\0';
  88
  89                 tail = p + alix_sig_len;
  90 -               if ((tail[0] == '2' || tail[0] == '3')) {
  91 +               if ((tail[0] == '2' || tail[0] == '3' || tail[0] == '6')) {
  92 +
  93                         printk(KERN_INFO
  94                                "%s: system is recognized as \"%s\"\n",
  95                                KBUILD_MODNAME, name);
  96 @@ -120,6 +160,24 @@ static int __init alix_present(unsigned
  97         return 0;
  98  }
  99
 100 +static bool __init alix_present_dmi(void)
 101 +{
 102 +       const char *vendor, *product;
 103 +
 104 +       vendor = dmi_get_system_info(DMI_SYS_VENDOR);
 105 +       if (!vendor || strcmp(vendor, "PC Engines"))
 106 +               return false;
 107 +
 108 +       product = dmi_get_system_info(DMI_PRODUCT_NAME);
 109 +       if (!product || (strcmp(product, "ALIX.2D") && strcmp(product, "ALIX.6")))
 110 +               return false;
 111 +
 112 +       printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
 113 +              KBUILD_MODNAME, vendor, product);
 114 +
 115 +       return true;
 116 +}
 117 +
 118  static int __init alix_init(void)
 119  {
 120         const char tinybios_sig[] = "PC Engines ALIX.";
 121 @@ -128,8 +186,9 @@ static int __init alix_init(void)
 122         if (!is_geode())
 123                 return 0;
 124
 125 -       if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
 126 -           alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
 127 +       if (alix_present(BIOS_SIGNATURE_TINYBIOS, tinybios_sig, sizeof(tinybios_sig) - 1) ||
 128 +           alix_present(BIOS_SIGNATURE_COREBOOT, coreboot_sig, sizeof(coreboot_sig) - 1) ||
 129 +           alix_present_dmi())
 130                 register_alix();
 131
 132         return 0;