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thinkpad-acpi: add internal hotkey event API

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Add an internal API to the driver, to allow subdrivers to request and
receive HKEY 0x1000 events.  This API will be used by the backlight
(brightness up/down) and upcoming ALSA mixer (volume up/down/mute)
subdrivers.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh 2009-09-20 14:09:26 -03:00 committed by Len Brown
parent 0d922e3b84
commit 8b468c0c85
1 changed files with 48 additions and 0 deletions
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48
drivers/platform/x86/thinkpad_acpi.c
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@ -2014,6 +2014,9 @@ static u16 *hotkey_keycode_map;
static struct attribute_set *hotkey_dev_attributes;
static void tpacpi_driver_event(const unsigned int hkey_event);
static void hotkey_driver_event(const unsigned int scancode);
/* HKEY.MHKG() return bits */
#define TP_HOTKEY_TABLET_MASK (1 << 3)
@ -2168,6 +2171,35 @@ static int hotkey_user_mask_set(const u32 mask)
return rc;
}
/*
* Sets the driver hotkey mask.
*
* Can be called even if the hotkey subdriver is inactive
*/
static int tpacpi_hotkey_driver_mask_set(const u32 mask)
{
int rc;
/* Do the right thing if hotkey_init has not been called yet */
if (!tp_features.hotkey) {
hotkey_driver_mask = mask;
return 0;
}
mutex_lock(&hotkey_mutex);
HOTKEY_CONFIG_CRITICAL_START
hotkey_driver_mask = mask;
hotkey_source_mask |= (mask & ~hotkey_all_mask);
HOTKEY_CONFIG_CRITICAL_END
rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
~hotkey_source_mask);
mutex_unlock(&hotkey_mutex);
return rc;
}
static int hotkey_status_get(int *status)
{
if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
@ -2227,6 +2259,7 @@ static void tpacpi_input_send_key(const unsigned int scancode)
/* Do NOT call without validating scancode first */
static void tpacpi_input_send_key_masked(const unsigned int scancode)
{
hotkey_driver_event(scancode);
if (hotkey_user_mask & (1 << scancode))
tpacpi_input_send_key(scancode);
}
@ -7625,6 +7658,21 @@ static struct ibm_struct fan_driver_data = {
****************************************************************************
****************************************************************************/
/*
* HKEY event callout for other subdrivers go here
* (yes, it is ugly, but it is quick, safe, and gets the job done
*/
static void tpacpi_driver_event(const unsigned int hkey_event)
{
}
static void hotkey_driver_event(const unsigned int scancode)
{
tpacpi_driver_event(0x1001 + scancode);
}
/* sysfs name ---------------------------------------------------------- */
static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
struct device_attribute *attr,