releases/upstream/2.6.29-rc2/0010-ACPI-thinkpad-acpi-handle-HKEY-thermal-and-battery.patch

   1 From 106b4e6657e10831f35c32afa26d9c11e6312783 Mon Sep 17 00:00:00 2001
   2 From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   3 Date: Sun, 11 Jan 2009 03:01:06 -0200
   4 Subject: ACPI: thinkpad-acpi: handle HKEY thermal and battery alarms
   5
   6 Handle some HKEY events that are actually firmware alarms.  For
   7 now, we do the simple thing: log specific messages to the log and let
   8 the thinkpad-specific event pass to userspace.
   9
  10 In the future, these events will be migrated to generic notifications
  11 and subsystems.
  12
  13 These alarms are NOT available on all ThinkPads.  E.g. the T43 only
  14 issues 0x6011 and 0x6012.
  15
  16 Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
  17 Signed-off-by: Len Brown <len.brown@intel.com>
  18 ---
  19  drivers/platform/x86/thinkpad_acpi.c |   63 +++++++++++++++++++++++++++++++--
  20  1 files changed, 59 insertions(+), 4 deletions(-)
  21
  22 diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
  23 index d833ee6..c4e4b64 100644
  24 --- a/drivers/platform/x86/thinkpad_acpi.c
  25 +++ b/drivers/platform/x86/thinkpad_acpi.c
  26 @@ -174,10 +174,12 @@ enum {
  27
  28  /* Debugging */
  29  #define TPACPI_LOG TPACPI_FILE ": "
  30 -#define TPACPI_ERR        KERN_ERR    TPACPI_LOG
  31 -#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
  32 -#define TPACPI_INFO   KERN_INFO   TPACPI_LOG
  33 -#define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
  34 +#define TPACPI_ALERT   KERN_ALERT  TPACPI_LOG
  35 +#define TPACPI_CRIT    KERN_CRIT   TPACPI_LOG
  36 +#define TPACPI_ERR     KERN_ERR    TPACPI_LOG
  37 +#define TPACPI_NOTICE  KERN_NOTICE TPACPI_LOG
  38 +#define TPACPI_INFO    KERN_INFO   TPACPI_LOG
  39 +#define TPACPI_DEBUG   KERN_DEBUG  TPACPI_LOG
  40
  41  #define TPACPI_DBG_ALL         0xffff
  42  #define TPACPI_DBG_INIT                0x0001
  43 @@ -2614,6 +2616,15 @@ static bool hotkey_notify_wakeup(const u32 hkey,
  44                 *ignore_acpi_ev = true;
  45                 break;
  46
  47 +       case 0x2313: /* Battery on critical low level (S3) */
  48 +       case 0x2413: /* Battery on critical low level (S4) */
  49 +               printk(TPACPI_ALERT
  50 +                       "EMERGENCY WAKEUP: battery almost empty\n");
  51 +               /* how to auto-heal: */
  52 +               /* 2313: woke up from S3, go to S4/S5 */
  53 +               /* 2413: woke up from S4, go to S5 */
  54 +               break;
  55 +
  56         default:
  57                 return false;
  58         }
  59 @@ -2659,6 +2670,45 @@ static bool hotkey_notify_usrevent(const u32 hkey,
  60         }
  61  }
  62
  63 +static bool hotkey_notify_thermal(const u32 hkey,
  64 +                                bool *send_acpi_ev,
  65 +                                bool *ignore_acpi_ev)
  66 +{
  67 +       /* 0x6000-0x6FFF: thermal alarms */
  68 +       *send_acpi_ev = true;
  69 +       *ignore_acpi_ev = false;
  70 +
  71 +       switch (hkey) {
  72 +       case 0x6011:
  73 +               printk(TPACPI_CRIT
  74 +                       "THERMAL ALARM: battery is too hot!\n");
  75 +               /* recommended action: warn user through gui */
  76 +               return true;
  77 +       case 0x6012:
  78 +               printk(TPACPI_ALERT
  79 +                       "THERMAL EMERGENCY: battery is extremely hot!\n");
  80 +               /* recommended action: immediate sleep/hibernate */
  81 +               return true;
  82 +       case 0x6021:
  83 +               printk(TPACPI_CRIT
  84 +                       "THERMAL ALARM: "
  85 +                       "a sensor reports something is too hot!\n");
  86 +               /* recommended action: warn user through gui, that */
  87 +               /* some internal component is too hot */
  88 +               return true;
  89 +       case 0x6022:
  90 +               printk(TPACPI_ALERT
  91 +                       "THERMAL EMERGENCY: "
  92 +                       "a sensor reports something is extremely hot!\n");
  93 +               /* recommended action: immediate sleep/hibernate */
  94 +               return true;
  95 +       default:
  96 +               printk(TPACPI_ALERT
  97 +                        "THERMAL ALERT: unknown thermal alarm received\n");
  98 +               return false;
  99 +       }
 100 +}
 101 +
 102  static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 103  {
 104         u32 hkey;
 105 @@ -2731,6 +2781,11 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 106                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
 107                                                  &ignore_acpi_ev);
 108                         break;
 109 +               case 6:
 110 +                       /* 0x6000-0x6FFF: thermal alarms */
 111 +                       known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
 112 +                                                &ignore_acpi_ev);
 113 +                       break;
 114                 case 7:
 115                         /* 0x7000-0x7FFF: misc */
 116                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
 117 --
 118 1.5.6.5
 119