package/base/linux/applesmc-led.patch

   1 # --- T2-COPYRIGHT-NOTE-BEGIN ---
   2 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   3 #
   4 # T2 SDE: package/.../linux26/applesmc-led.patch
   5 # Copyright (C) 2008 - 2011 The T2 SDE Project
   6 #
   7 # More information can be found in the files COPYING and README.
   8 #
   9 # This patch file is dual-licensed. It is available under the license the
  10 # patched project is licensed under, as long as it is an OpenSource license
  11 # as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
  12 # of the GNU General Public License as published by the Free Software
  13 # Foundation; either version 2 of the License, or (at your option) any later
  14 # version.
  15 # --- T2-COPYRIGHT-NOTE-END ---
  16
  17 LED activity indicator for Apple Intel hardware thru applesmc.
  18
  19 The SMC key used might not be perfect, it should rise the off
  20 level, however the other ones sounding more appropriate did
  21 not work.
  22
  23   Signed-off-by: René Rebe <rene@exactcode.de>
  24
  25 --- linux-2.6.38/drivers/hwmon/applesmc.c.vanilla       2011-03-24 13:45:26.000000000 +0000
  26 +++ linux-2.6.38/drivers/hwmon/applesmc.c       2011-03-24 14:08:37.000000000 +0000
  27 @@ -68,6 +68,7 @@
  28  #define LIGHT_SENSOR_LEFT_KEY  "ALV0" /* r-o {alv (6-10 bytes) */
  29  #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */
  30  #define BACKLIGHT_KEY          "LKSB" /* w-o {lkb (2 bytes) */
  31 +#define LED_KEY                        "LSLF" /* r-w ui16 */
  32
  33  #define CLAMSHELL_KEY          "MSLD" /* r-o ui8 (unused) */
  34
  35 @@ -138,6 +139,7 @@
  36         int num_light_sensors;          /* number of light sensors */
  37         bool has_accelerometer;         /* has motion sensor */
  38         bool has_key_backlight;         /* has keyboard backlight */
  39 +       bool has_key_led;               /* has case led light */
  40         bool init_complete;             /* true when fully initialized */
  41         struct applesmc_entry *cache;   /* cached key entries */
  42  } smcreg = {
  43 @@ -148,7 +150,7 @@
  44  static struct platform_device *pdev;
  45  static s16 rest_x;
  46  static s16 rest_y;
  47 -static u8 backlight_state[2];
  48 +static u8 backlight_state[2], backlight_state2[2];
  49
  50  static struct device *hwmon_dev;
  51  static struct input_polled_dev *applesmc_idev;
  52 @@ -159,7 +161,7 @@
  53   */
  54  static unsigned int key_at_index;
  55
  56 -static struct workqueue_struct *applesmc_led_wq;
  57 +static struct workqueue_struct *applesmc_led_wq, *applesmc_led2_wq;
  58
  59  /*
  60   * __wait_status - Wait up to 32ms for the status port to get a certain value
  61 @@ -525,6 +527,9 @@
  62         ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
  63         if (ret)
  64                 return ret;
  65 +       ret = applesmc_has_key(LED_KEY, &s->has_key_led);
  66 +       if (ret)
  67 +               return ret;
  68
  69         s->num_light_sensors = left_light_sensor + right_light_sensor;
  70         s->init_complete = true;
  71 @@ -897,6 +903,24 @@
  72                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
  73  }
  74
  75 +static void applesmc_backlight2_set(struct work_struct *work)
  76 +{
  77 +       applesmc_write_key(LED_KEY, backlight_state2, 2);
  78 +}
  79 +static DECLARE_WORK(backlight2_work, &applesmc_backlight2_set);
  80 +
  81 +static void applesmc_brightness2_set(struct led_classdev *led_cdev,
  82 +                                               enum led_brightness value)
  83 +{
  84 +       int ret;
  85 +
  86 +       backlight_state2[0] = value;
  87 +       ret = queue_work(applesmc_led2_wq, &backlight2_work);
  88 +
  89 +       if (debug && (!ret))
  90 +               printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
  91 +}
  92 +
  93  static ssize_t applesmc_key_count_show(struct device *dev,
  94                                 struct device_attribute *attr, char *sysfsbuf)
  95  {
  96 @@ -991,6 +1015,12 @@
  97         .brightness_set         = applesmc_brightness_set,
  98  };
  99
 100 +static struct led_classdev applesmc_led = {
 101 +       .name                   = "smc::case-led",
 102 +       .default_trigger        = "ide-disk",
 103 +       .brightness_set         = applesmc_brightness2_set,
 104 +};
 105 +
 106  static struct applesmc_node_group info_group[] = {
 107         { "name", applesmc_name_show },
 108         { "key_count", applesmc_key_count_show },
 109 @@ -1184,6 +1214,24 @@
 110         destroy_workqueue(applesmc_led_wq);
 111  }
 112
 113 +static int applesmc_create_case_led(void)
 114 +{
 115 +       if (!smcreg.has_key_led)
 116 +               return 0;
 117 +       applesmc_led2_wq = create_singlethread_workqueue("applesmc-led2");
 118 +       if (!applesmc_led2_wq)
 119 +               return -ENOMEM;
 120 +       return led_classdev_register(&pdev->dev, &applesmc_led);
 121 +}
 122 +
 123 +static void applesmc_release_case_led(void)
 124 +{
 125 +       if (!smcreg.has_key_led)
 126 +               return;
 127 +       led_classdev_unregister(&applesmc_led);
 128 +       destroy_workqueue(applesmc_led2_wq);
 129 +}
 130 +
 131  static int applesmc_dmi_match(const struct dmi_system_id *id)
 132  {
 133         return 1;
 134 @@ -1275,6 +1323,10 @@
 135         if (ret)
 136                 goto out_light_sysfs;
 137
 138 +       ret = applesmc_create_case_led();
 139 +       if (ret)
 140 +               goto out_led_sysfs;
 141 +
 142         hwmon_dev = hwmon_device_register(&pdev->dev);
 143         if (IS_ERR(hwmon_dev)) {
 144                 ret = PTR_ERR(hwmon_dev);
 145 @@ -1284,6 +1336,8 @@
 146         return 0;
 147
 148  out_light_ledclass:
 149 +       applesmc_release_case_led();
 150 +out_led_sysfs:
 151         applesmc_release_key_backlight();
 152  out_light_sysfs:
 153         applesmc_release_light_sensor();
 154 @@ -1311,6 +1365,7 @@
 155  static void __exit applesmc_exit(void)
 156  {
 157         hwmon_device_unregister(hwmon_dev);
 158 +       applesmc_release_case_led();
 159         applesmc_release_key_backlight();
 160         applesmc_release_light_sensor();
 161         applesmc_release_accelerometer();