Merge branch 'msi-wmi' into release
authorLen Brown <len.brown@intel.com>
Wed, 16 Dec 2009 18:57:12 +0000 (13:57 -0500)
committerLen Brown <len.brown@intel.com>
Wed, 16 Dec 2009 18:57:12 +0000 (13:57 -0500)
drivers/platform/x86/Kconfig
drivers/platform/x86/Makefile
drivers/platform/x86/msi-wmi.c [new file with mode: 0644]

index e5e43121995df383c7ee9f0c6eb22a96213c7756..ba3638fdf0ceae9466585e4c3d64de5fd096e0c2 100644 (file)
@@ -367,6 +367,18 @@ config ACPI_WMI
          It is safe to enable this driver even if your DSDT doesn't define
          any ACPI-WMI devices.
 
+config MSI_WMI
+       tristate "MSI WMI extras"
+       depends on ACPI_WMI
+       depends on INPUT
+       depends on BACKLIGHT_CLASS_DEVICE
+       select INPUT_SPARSEKMAP
+       help
+        Say Y here if you want to support WMI-based hotkeys on MSI laptops.
+
+        To compile this driver as a module, choose M here: the module will
+        be called msi-wmi.
+
 config ACPI_ASUS
        tristate "ASUS/Medion Laptop Extras (DEPRECATED)"
        depends on ACPI
index d1c16210a5124a3ea14ce8219db11994b0ce30a6..13aa37310f335b1c35a5e9cedaec432d75d3b73a 100644 (file)
@@ -18,6 +18,7 @@ obj-$(CONFIG_FUJITSU_LAPTOP)  += fujitsu-laptop.o
 obj-$(CONFIG_PANASONIC_LAPTOP) += panasonic-laptop.o
 obj-$(CONFIG_INTEL_MENLOW)     += intel_menlow.o
 obj-$(CONFIG_ACPI_WMI)         += wmi.o
+obj-$(CONFIG_MSI_WMI)          += msi-wmi.o
 obj-$(CONFIG_ACPI_ASUS)                += asus_acpi.o
 obj-$(CONFIG_TOPSTAR_LAPTOP)   += topstar-laptop.o
 obj-$(CONFIG_ACPI_TOSHIBA)     += toshiba_acpi.o
diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
new file mode 100644 (file)
index 0000000..0c8fe14
--- /dev/null
@@ -0,0 +1,293 @@
+/*
+ * MSI WMI hotkeys
+ *
+ * Copyright (C) 2009 Novell <trenn@suse.de>
+ *
+ * Most stuff taken over from hp-wmi
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+
+MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
+MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
+MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
+
+/* Temporary workaround until the WMI sysfs interface goes in
+               { "svn", DMI_SYS_VENDOR },
+               { "pn",  DMI_PRODUCT_NAME },
+               { "pvr", DMI_PRODUCT_VERSION },
+               { "rvn", DMI_BOARD_VENDOR },
+               { "rn",  DMI_BOARD_NAME },
+*/
+
+MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*");
+
+#define DRV_NAME "msi-wmi"
+#define DRV_PFX DRV_NAME ": "
+
+#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
+#define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
+
+#define dprintk(msg...) pr_debug(DRV_PFX msg)
+
+#define KEYCODE_BASE 0xD0
+#define MSI_WMI_BRIGHTNESSUP   KEYCODE_BASE
+#define MSI_WMI_BRIGHTNESSDOWN (KEYCODE_BASE + 1)
+#define MSI_WMI_VOLUMEUP       (KEYCODE_BASE + 2)
+#define MSI_WMI_VOLUMEDOWN     (KEYCODE_BASE + 3)
+static struct key_entry msi_wmi_keymap[] = {
+       { KE_KEY, MSI_WMI_BRIGHTNESSUP,   {KEY_BRIGHTNESSUP} },
+       { KE_KEY, MSI_WMI_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} },
+       { KE_KEY, MSI_WMI_VOLUMEUP,       {KEY_VOLUMEUP} },
+       { KE_KEY, MSI_WMI_VOLUMEDOWN,     {KEY_VOLUMEDOWN} },
+       { KE_END, 0}
+};
+static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
+
+struct backlight_device *backlight;
+
+static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
+
+static struct input_dev *msi_wmi_input_dev;
+
+static int msi_wmi_query_block(int instance, int *ret)
+{
+       acpi_status status;
+       union acpi_object *obj;
+
+       struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+
+       status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
+
+       obj = output.pointer;
+
+       if (!obj || obj->type != ACPI_TYPE_INTEGER) {
+               if (obj) {
+                       printk(KERN_ERR DRV_PFX "query block returned object "
+                              "type: %d - buffer length:%d\n", obj->type,
+                              obj->type == ACPI_TYPE_BUFFER ?
+                              obj->buffer.length : 0);
+               }
+               kfree(obj);
+               return -EINVAL;
+       }
+       *ret = obj->integer.value;
+       kfree(obj);
+       return 0;
+}
+
+static int msi_wmi_set_block(int instance, int value)
+{
+       acpi_status status;
+
+       struct acpi_buffer input = { sizeof(int), &value };
+
+       dprintk("Going to set block of instance: %d - value: %d\n",
+               instance, value);
+
+       status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
+
+       return ACPI_SUCCESS(status) ? 0 : 1;
+}
+
+static int bl_get(struct backlight_device *bd)
+{
+       int level, err, ret;
+
+       /* Instance 1 is "get backlight", cmp with DSDT */
+       err = msi_wmi_query_block(1, &ret);
+       if (err) {
+               printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err);
+               return -EINVAL;
+       }
+       dprintk("Get: Query block returned: %d\n", ret);
+       for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
+               if (backlight_map[level] == ret) {
+                       dprintk("Current backlight level: 0x%X - index: %d\n",
+                               backlight_map[level], level);
+                       break;
+               }
+       }
+       if (level == ARRAY_SIZE(backlight_map)) {
+               printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n",
+                      ret);
+               return -EINVAL;
+       }
+       return level;
+}
+
+static int bl_set_status(struct backlight_device *bd)
+{
+       int bright = bd->props.brightness;
+       if (bright >= ARRAY_SIZE(backlight_map) || bright < 0)
+               return -EINVAL;
+
+       /* Instance 0 is "set backlight" */
+       return msi_wmi_set_block(0, backlight_map[bright]);
+}
+
+static struct backlight_ops msi_backlight_ops = {
+       .get_brightness = bl_get,
+       .update_status  = bl_set_status,
+};
+
+static void msi_wmi_notify(u32 value, void *context)
+{
+       struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+       static struct key_entry *key;
+       union acpi_object *obj;
+       ktime_t cur;
+
+       wmi_get_event_data(value, &response);
+
+       obj = (union acpi_object *)response.pointer;
+
+       if (obj && obj->type == ACPI_TYPE_INTEGER) {
+               int eventcode = obj->integer.value;
+               dprintk("Eventcode: 0x%x\n", eventcode);
+               key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
+                               eventcode);
+               if (key) {
+                       ktime_t diff;
+                       cur = ktime_get_real();
+                       diff = ktime_sub(cur, last_pressed[key->code -
+                                       KEYCODE_BASE]);
+                       /* Ignore event if the same event happened in a 50 ms
+                          timeframe -> Key press may result in 10-20 GPEs */
+                       if (ktime_to_us(diff) < 1000 * 50) {
+                               dprintk("Suppressed key event 0x%X - "
+                                       "Last press was %lld us ago\n",
+                                        key->code, ktime_to_us(diff));
+                               return;
+                       }
+                       last_pressed[key->code - KEYCODE_BASE] = cur;
+
+                       if (key->type == KE_KEY &&
+                       /* Brightness is served via acpi video driver */
+                       (!acpi_video_backlight_support() ||
+                       (key->code != MSI_WMI_BRIGHTNESSUP &&
+                       key->code != MSI_WMI_BRIGHTNESSDOWN))) {
+                               dprintk("Send key: 0x%X - "
+                                       "Input layer keycode: %d\n", key->code,
+                                        key->keycode);
+                               sparse_keymap_report_entry(msi_wmi_input_dev,
+                                               key, 1, true);
+                       }
+               } else
+                       printk(KERN_INFO "Unknown key pressed - %x\n",
+                              eventcode);
+       } else
+               printk(KERN_INFO DRV_PFX "Unknown event received\n");
+       kfree(response.pointer);
+}
+
+static int __init msi_wmi_input_setup(void)
+{
+       int err;
+
+       msi_wmi_input_dev = input_allocate_device();
+       if (!msi_wmi_input_dev)
+               return -ENOMEM;
+
+       msi_wmi_input_dev->name = "MSI WMI hotkeys";
+       msi_wmi_input_dev->phys = "wmi/input0";
+       msi_wmi_input_dev->id.bustype = BUS_HOST;
+
+       err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
+       if (err)
+               goto err_free_dev;
+
+       err = input_register_device(msi_wmi_input_dev);
+
+       if (err)
+               goto err_free_keymap;
+
+       memset(last_pressed, 0, sizeof(last_pressed));
+
+       return 0;
+
+err_free_keymap:
+       sparse_keymap_free(msi_wmi_input_dev);
+err_free_dev:
+       input_free_device(msi_wmi_input_dev);
+       return err;
+}
+
+static int __init msi_wmi_init(void)
+{
+       int err;
+
+       if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
+               printk(KERN_ERR
+                      "This machine doesn't have MSI-hotkeys through WMI\n");
+               return -ENODEV;
+       }
+       err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
+                       msi_wmi_notify, NULL);
+       if (err)
+               return -EINVAL;
+
+       err = msi_wmi_input_setup();
+       if (err)
+               goto err_uninstall_notifier;
+
+       if (!acpi_video_backlight_support()) {
+               backlight = backlight_device_register(DRV_NAME,
+                               NULL, NULL, &msi_backlight_ops);
+               if (IS_ERR(backlight))
+                       goto err_free_input;
+
+               backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
+               err = bl_get(NULL);
+               if (err < 0)
+                       goto err_free_backlight;
+
+               backlight->props.brightness = err;
+       }
+       dprintk("Event handler installed\n");
+
+       return 0;
+
+err_free_backlight:
+       backlight_device_unregister(backlight);
+err_free_input:
+       input_unregister_device(msi_wmi_input_dev);
+err_uninstall_notifier:
+       wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
+       return err;
+}
+
+static void __exit msi_wmi_exit(void)
+{
+       if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
+               wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
+               sparse_keymap_free(msi_wmi_input_dev);
+               input_unregister_device(msi_wmi_input_dev);
+               backlight_device_unregister(backlight);
+       }
+}
+
+module_init(msi_wmi_init);
+module_exit(msi_wmi_exit);