1 files changed, 148 insertions, 41 deletions

diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 0f900cc9fa7a..66f53c3c35e8 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -26,11 +26,13 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/input.h>
 #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 +40,8 @@ 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 +58,7 @@ 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 +76,7 @@ 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},
 
@@ -96,9 +100,50 @@ 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)
+static struct key_entry *dell_wmi_get_entry_by_scancode(unsigned int code)
 {
         struct key_entry *key;
 
@@ -109,7 +154,7 @@ static struct key_entry *dell_wmi_get_entry_by_scancode(int code)
         return NULL;
 }
 
-static struct key_entry *dell_wmi_get_entry_by_keycode(int keycode)
+static struct key_entry *dell_wmi_get_entry_by_keycode(unsigned int keycode)
 {
         struct key_entry *key;
 
@@ -120,8 +165,8 @@ static struct key_entry *dell_wmi_get_entry_by_keycode(int keycode)
         return NULL;
 }
 
-static int dell_wmi_getkeycode(struct input_dev *dev, int scancode,
-                               int *keycode)
+static int dell_wmi_getkeycode(struct input_dev *dev,
+                                unsigned int scancode, unsigned int *keycode)
 {
         struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode);
 
@@ -133,13 +178,11 @@ static int dell_wmi_getkeycode(struct input_dev *dev, int scancode,
         return -EINVAL;
 }
 
-static int dell_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
+static int dell_wmi_setkeycode(struct input_dev *dev,
+                                unsigned int scancode, unsigned int keycode)
 {
         struct key_entry *key;
-        int old_keycode;
-
-        if (keycode < 0 || keycode > KEY_MAX)
-                return -EINVAL;
+        unsigned int old_keycode;
 
         key = dell_wmi_get_entry_by_scancode(scancode);
         if (key && key->type == KE_KEY) {
@@ -158,30 +201,91 @@ 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]);
+                        kfree(obj);
+                        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 */
+                        ;
+                } 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);