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hp-wmi: Enable hotkeys on some systems 

This is a third attempt to enable these buttons. The new variable being
commit 997daa1bd9 (i.e. hp-wmi: detect
"2009 BIOS or later"). Older systems that do not have the 2009 BIOS query
method respond with a dummy value, in this case 4. Using that, we can
target a fairly narrow group of systems. i.e. old enough to not have
HPWMI_FEATURE_QUERY 0xd, but new enough to have HPWMI_BIOS_QUERY 0x9.
This group may be further limited if some systems respond with something
other than 4 to non-existant feature queries.

Signed-off-by: Kyle Evans <kvans32@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Kyle Evans 2014-06-09 12:26:06 -05:00 committed by Matthew Garrett
parent 8b9dd4fab2
commit f82bdd0d77
1 changed files with 18 additions and 0 deletions
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18
drivers/platform/x86/hp-wmi.c
View File

@ -53,6 +53,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
#define HPWMI_ALS_QUERY 0x3
#define HPWMI_HARDWARE_QUERY 0x4
#define HPWMI_WIRELESS_QUERY 0x5
#define HPWMI_BIOS_QUERY 0x9
#define HPWMI_HOTKEY_QUERY 0xc
#define HPWMI_FEATURE_QUERY 0xd
#define HPWMI_WIRELESS2_QUERY 0x1b
@ -144,6 +145,7 @@ static const struct key_entry hp_wmi_keymap[] = {
{ KE_KEY, 0x2142, { KEY_MEDIA } },
{ KE_KEY, 0x213b, { KEY_INFO } },
{ KE_KEY, 0x2169, { KEY_DIRECTION } },
{ KE_KEY, 0x216a, { KEY_SETUP } },
{ KE_KEY, 0x231b, { KEY_HELP } },
{ KE_END, 0 }
};
@ -304,6 +306,19 @@ static int hp_wmi_bios_2009_later(void)
return (state & 0x10) ? 1 : 0;
}
static int hp_wmi_enable_hotkeys(void)
{
int ret;
int query = 0x6e;
ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
0);
if (ret)
return -EINVAL;
return 0;
}
static int hp_wmi_set_block(void *data, bool blocked)
{
enum hp_wmi_radio r = (enum hp_wmi_radio) data;
@ -648,6 +663,9 @@ static int __init hp_wmi_input_setup(void)
hp_wmi_tablet_state());
input_sync(hp_wmi_input_dev);
if (hp_wmi_bios_2009_later() == 4)
hp_wmi_enable_hotkeys();
status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
if (ACPI_FAILURE(status)) {
err = -EIO;