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path: root/drivers/platform/x86/dell-wmi.c
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Diffstat (limited to 'drivers/platform/x86/dell-wmi.c')
-rw-r--r--drivers/platform/x86/dell-wmi.c171
1 files changed, 139 insertions, 32 deletions
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 0f900cc9fa7..1b1dddbd574 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -31,6 +31,7 @@
#include <acpi/acpi_drivers.h>
#include <linux/acpi.h>
#include <linux/string.h>
+#include <linux/dmi.h>
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
@@ -38,6 +39,8 @@ MODULE_LICENSE("GPL");
#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
+static int acpi_video;
+
MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
struct key_entry {
@@ -54,7 +57,7 @@ enum { KE_KEY, KE_SW, KE_IGNORE, KE_END };
* via the keyboard controller so should not be sent again.
*/
-static struct key_entry dell_wmi_keymap[] = {
+static struct key_entry dell_legacy_wmi_keymap[] = {
{KE_KEY, 0xe045, KEY_PROG1},
{KE_KEY, 0xe009, KEY_EJECTCD},
@@ -72,7 +75,7 @@ static struct key_entry dell_wmi_keymap[] = {
/* The next device is at offset 6, the active devices are at
offset 8 and the attached devices at offset 10 */
- {KE_KEY, 0xe00b, KEY_DISPLAYTOGGLE},
+ {KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE},
{KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE},
@@ -96,6 +99,47 @@ static struct key_entry dell_wmi_keymap[] = {
{KE_END, 0}
};
+static bool dell_new_hk_type;
+
+struct dell_new_keymap_entry {
+ u16 scancode;
+ u16 keycode;
+};
+
+struct dell_hotkey_table {
+ struct dmi_header header;
+ struct dell_new_keymap_entry keymap[];
+
+};
+
+static struct key_entry *dell_new_wmi_keymap;
+
+static u16 bios_to_linux_keycode[256] = {
+
+ KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG,
+ KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
+ KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE,
+ KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD,
+ KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN,
+ KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE,
+ KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN,
+ KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2,
+ KEY_UNKNOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ KEY_PROG3
+};
+
+
+static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap;
+
static struct input_dev *dell_wmi_input_dev;
static struct key_entry *dell_wmi_get_entry_by_scancode(int code)
@@ -158,30 +202,90 @@ static void dell_wmi_notify(u32 value, void *context)
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
static struct key_entry *key;
union acpi_object *obj;
+ acpi_status status;
- wmi_get_event_data(value, &response);
+ status = wmi_get_event_data(value, &response);
+ if (status != AE_OK) {
+ printk(KERN_INFO "dell-wmi: bad event status 0x%x\n", status);
+ return;
+ }
obj = (union acpi_object *)response.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER) {
- int *buffer = (int *)obj->buffer.pointer;
- /*
- * The upper bytes of the event may contain
- * additional information, so mask them off for the
- * scancode lookup
- */
- key = dell_wmi_get_entry_by_scancode(buffer[1] & 0xFFFF);
- if (key) {
+ int reported_key;
+ u16 *buffer_entry = (u16 *)obj->buffer.pointer;
+ if (dell_new_hk_type && (buffer_entry[1] != 0x10)) {
+ printk(KERN_INFO "dell-wmi: Received unknown WMI event"
+ " (0x%x)\n", buffer_entry[1]);
+ return;
+ }
+
+ if (dell_new_hk_type)
+ reported_key = (int)buffer_entry[2];
+ else
+ reported_key = (int)buffer_entry[1] & 0xffff;
+
+ key = dell_wmi_get_entry_by_scancode(reported_key);
+
+ if (!key) {
+ printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
+ reported_key);
+ } else if ((key->keycode == KEY_BRIGHTNESSUP ||
+ key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) {
+ /* Don't report brightness notifications that will also
+ * come via ACPI */
+ return;
+ } else {
input_report_key(dell_wmi_input_dev, key->keycode, 1);
input_sync(dell_wmi_input_dev);
input_report_key(dell_wmi_input_dev, key->keycode, 0);
input_sync(dell_wmi_input_dev);
- } else if (buffer[1] & 0xFFFF)
- printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
- buffer[1] & 0xFFFF);
+ }
+ }
+ kfree(obj);
+}
+
+
+static void setup_new_hk_map(const struct dmi_header *dm)
+{
+
+ int i;
+ int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry);
+ struct dell_hotkey_table *table =
+ container_of(dm, struct dell_hotkey_table, header);
+
+ dell_new_wmi_keymap = kzalloc((hotkey_num+1) *
+ sizeof(struct key_entry), GFP_KERNEL);
+
+ for (i = 0; i < hotkey_num; i++) {
+ dell_new_wmi_keymap[i].type = KE_KEY;
+ dell_new_wmi_keymap[i].code = table->keymap[i].scancode;
+ dell_new_wmi_keymap[i].keycode =
+ (table->keymap[i].keycode > 255) ? 0 :
+ bios_to_linux_keycode[table->keymap[i].keycode];
+ }
+
+ dell_new_wmi_keymap[i].type = KE_END;
+ dell_new_wmi_keymap[i].code = 0;
+ dell_new_wmi_keymap[i].keycode = 0;
+
+ dell_wmi_keymap = dell_new_wmi_keymap;
+
+}
+
+
+static void find_hk_type(const struct dmi_header *dm, void *dummy)
+{
+
+ if ((dm->type == 0xb2) && (dm->length > 6)) {
+ dell_new_hk_type = true;
+ setup_new_hk_map(dm);
}
+
}
+
static int __init dell_wmi_input_setup(void)
{
struct key_entry *key;
@@ -224,34 +328,37 @@ static int __init dell_wmi_input_setup(void)
static int __init dell_wmi_init(void)
{
int err;
+ acpi_status status;
- if (wmi_has_guid(DELL_EVENT_GUID)) {
- err = dell_wmi_input_setup();
+ if (!wmi_has_guid(DELL_EVENT_GUID)) {
+ printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");
+ return -ENODEV;
+ }
- if (err)
- return err;
+ dmi_walk(find_hk_type, NULL);
+ acpi_video = acpi_video_backlight_support();
- err = wmi_install_notify_handler(DELL_EVENT_GUID,
- dell_wmi_notify, NULL);
- if (err) {
- input_unregister_device(dell_wmi_input_dev);
- printk(KERN_ERR "dell-wmi: Unable to register"
- " notify handler - %d\n", err);
- return err;
- }
+ err = dell_wmi_input_setup();
+ if (err)
+ return err;
- } else
- printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");
+ status = wmi_install_notify_handler(DELL_EVENT_GUID,
+ dell_wmi_notify, NULL);
+ if (ACPI_FAILURE(status)) {
+ input_unregister_device(dell_wmi_input_dev);
+ printk(KERN_ERR
+ "dell-wmi: Unable to register notify handler - %d\n",
+ status);
+ return -ENODEV;
+ }
return 0;
}
static void __exit dell_wmi_exit(void)
{
- if (wmi_has_guid(DELL_EVENT_GUID)) {
- wmi_remove_notify_handler(DELL_EVENT_GUID);
- input_unregister_device(dell_wmi_input_dev);
- }
+ wmi_remove_notify_handler(DELL_EVENT_GUID);
+ input_unregister_device(dell_wmi_input_dev);
}
module_init(dell_wmi_init);