Newer Dell systems support HotKey features differently from legacy
systems.
A new vendor specifc HotKey SMBIOS table (Type 0xB2) is defined. This
table contains a mapping between scancode and the corresponding
predefined
keyfunction ( i.e. keycode).. Also, a new ACPI-WMI event type (called
KeyIDList) with a value of 0x0010 is defined. Any BIOS containing 0xB2
table will send hotkey notifications using KeyIDList event.
Signed-off-by: Rezwanul Kabir <Rezwanul_Kabir@xxxxxxxx>
---
diff -urNp a/drivers/platform/x86/dell-wmi.c
b/drivers/platform/x86/dell-wmi.c
--- a/drivers/platform/x86/dell-wmi.c 2009-08-11 11:49:26.000000000
-0500
+++ b/drivers/platform/x86/dell-wmi.c 2009-08-18 12:20:10.000000000
-0500
@@ -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@xxxxxxxxxx>");
MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
@@ -54,7 +55,7 @@ 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},
@@ -96,6 +97,47 @@ static struct key_entry dell_wmi_keymap[
{KE_END, 0}
};
+static bool dell_new_hk_type = false;
+
+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_VIDEO_NEXT, KEY_UNKNOWN, KEY_UNKNOWN,
+ KEY_DISPLAYTOGGLE, 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)
@@ -133,6 +175,7 @@ static int dell_wmi_getkeycode(struct in
return -EINVAL;
}
+
static int dell_wmi_setkeycode(struct input_dev *dev, int scancode, int
keycode)
{
struct key_entry *key;
@@ -164,24 +207,65 @@ static void dell_wmi_notify(u32 value, v
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);
+ 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 0;
+ }
+ key =
dell_wmi_get_entry_by_scancode((int)buffer_entry[2]);
if (key) {
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)
+ } else
printk(KERN_INFO "dell-wmi: Unknown key %x
pressed\n",
- buffer[1] & 0xFFFF);
+ buffer_entry[2]);
+
}
}
+
+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;
@@ -226,6 +310,9 @@ static int __init dell_wmi_init(void)
int err;
if (wmi_has_guid(DELL_EVENT_GUID)) {
+
+ dmi_walk(find_hk_type, NULL);
+
err = dell_wmi_input_setup();
if (err)
--
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