X86 drivers: Introduce msi-wmi driver
This driver serves backlight (including switching) and volume up/down keys for MSI machines providing a specific wmi interface: 551A1F84-FBDD-4125-91DB-3EA8F44F1D45 B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2 Signed-off-by: Thomas Renninger <trenn@suse.de> CC: Carlos Corbacho <carlos@strangeworlds.co.uk> CC: Matthew Garrett <mjg59@srcf.ucam.org> Tested-by: Matt Chen <machen@novell.com> Reviewed-by: Anisse Astier <anisse@astier.eu> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Thomas Renninger
Len Brown
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d12d8baff9
3 changed files with 380 additions and 0 deletions
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@ -365,6 +365,16 @@ config ACPI_WMI
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It is safe to enable this driver even if your DSDT doesn't define
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any ACPI-WMI devices.
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config MSI_WMI
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tristate "MSI WMI extras"
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depends on ACPI_WMI
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depends on INPUT
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help
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Say Y here if you want to support WMI-based hotkeys on MSI laptops.
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To compile this driver as a module, choose M here: the module will
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be called msi-wmi.
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config ACPI_ASUS
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tristate "ASUS/Medion Laptop Extras (DEPRECATED)"
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depends on ACPI
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@ -18,6 +18,7 @@ obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
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obj-$(CONFIG_PANASONIC_LAPTOP) += panasonic-laptop.o
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obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
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obj-$(CONFIG_ACPI_WMI) += wmi.o
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obj-$(CONFIG_MSI_WMI) += msi-wmi.o
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obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o
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obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
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obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
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369
drivers/platform/x86/msi-wmi.c
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369
drivers/platform/x86/msi-wmi.c
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@ -0,0 +1,369 @@
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/*
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* MSI WMI hotkeys
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*
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* Copyright (C) 2009 Novell <trenn@suse.de>
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*
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* Most stuff taken over from hp-wmi
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/input.h>
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#include <acpi/acpi_drivers.h>
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#include <linux/acpi.h>
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#include <linux/string.h>
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#include <linux/hrtimer.h>
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#include <linux/backlight.h>
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MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
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MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Set this to 1 to let the driver be more verbose");
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MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
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MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
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/* Temporary workaround until the WMI sysfs interface goes in
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{ "svn", DMI_SYS_VENDOR },
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{ "pn", DMI_PRODUCT_NAME },
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{ "pvr", DMI_PRODUCT_VERSION },
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{ "rvn", DMI_BOARD_VENDOR },
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{ "rn", DMI_BOARD_NAME },
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*/
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MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*");
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#define DRV_NAME "msi-wmi"
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#define DRV_PFX DRV_NAME ": "
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#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
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#define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
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#define dprintk(msg...) do { \
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if (debug) \
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printk(KERN_INFO DRV_PFX msg); \
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} while (0)
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struct key_entry {
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char type; /* See KE_* below */
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u16 code;
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u16 keycode;
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int instance;
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ktime_t last_pressed;
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};
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/*
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* KE_KEY the only used key type, but keep this, others might also
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* show up in the future. Compare with hp-wmi.c
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*/
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enum { KE_KEY, KE_END };
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static struct key_entry msi_wmi_keymap[] = {
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{ KE_KEY, 0xd0, KEY_BRIGHTNESSUP, 0, {0, } },
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{ KE_KEY, 0xd1, KEY_BRIGHTNESSDOWN, 1, {0, } },
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{ KE_KEY, 0xd2, KEY_VOLUMEUP, 2, {0, } },
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{ KE_KEY, 0xd3, KEY_VOLUMEDOWN, 3, {0, } },
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{ KE_END, 0}
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};
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struct backlight_device *backlight;
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static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
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static struct input_dev *msi_wmi_input_dev;
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static int msi_wmi_query_block(int instance, int *ret)
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{
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acpi_status status;
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union acpi_object *obj;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
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obj = output.pointer;
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if (!obj || obj->type != ACPI_TYPE_INTEGER) {
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if (obj) {
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printk(KERN_ERR DRV_PFX "query block returned object "
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"type: %d - buffer length:%d\n", obj->type,
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obj->type == ACPI_TYPE_BUFFER ?
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obj->buffer.length : 0);
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}
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kfree(obj);
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return -EINVAL;
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}
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*ret = obj->integer.value;
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kfree(obj);
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return 0;
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}
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static int msi_wmi_set_block(int instance, int value)
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{
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acpi_status status;
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struct acpi_buffer input = { sizeof(int), &value };
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dprintk("Going to set block of instance: %d - value: %d\n",
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instance, value);
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status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
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return ACPI_SUCCESS(status) ? 0 : 1;
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}
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static int bl_get(struct backlight_device *bd)
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{
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int level, err, ret = 0;
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/* Instance 1 is "get backlight", cmp with DSDT */
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err = msi_wmi_query_block(1, &ret);
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if (err)
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printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err);
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dprintk("Get: Query block returned: %d\n", ret);
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for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
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if (backlight_map[level] == ret) {
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dprintk("Current backlight level: 0x%X - index: %d\n",
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backlight_map[level], level);
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break;
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}
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}
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if (level == ARRAY_SIZE(backlight_map)) {
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printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n",
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ret);
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return -EINVAL;
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}
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return level;
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}
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static int bl_set_status(struct backlight_device *bd)
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{
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int bright = bd->props.brightness;
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if (bright >= ARRAY_SIZE(backlight_map) || bright < 0)
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return -EINVAL;
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/* Instance 0 is "set backlight" */
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return msi_wmi_set_block(0, backlight_map[bright]);
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}
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static struct backlight_ops msi_backlight_ops = {
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.get_brightness = bl_get,
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.update_status = bl_set_status,
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};
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static struct key_entry *msi_wmi_get_entry_by_scancode(int code)
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{
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struct key_entry *key;
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for (key = msi_wmi_keymap; key->type != KE_END; key++)
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if (code == key->code)
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return key;
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return NULL;
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}
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static struct key_entry *msi_wmi_get_entry_by_keycode(int keycode)
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{
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struct key_entry *key;
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for (key = msi_wmi_keymap; key->type != KE_END; key++)
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if (key->type == KE_KEY && keycode == key->keycode)
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return key;
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return NULL;
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}
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static int msi_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
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{
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struct key_entry *key = msi_wmi_get_entry_by_scancode(scancode);
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if (key && key->type == KE_KEY) {
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*keycode = key->keycode;
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return 0;
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}
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return -EINVAL;
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}
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static int msi_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
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{
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struct key_entry *key;
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int old_keycode;
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if (keycode < 0 || keycode > KEY_MAX)
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return -EINVAL;
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key = msi_wmi_get_entry_by_scancode(scancode);
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if (key && key->type == KE_KEY) {
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old_keycode = key->keycode;
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key->keycode = keycode;
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set_bit(keycode, dev->keybit);
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if (!msi_wmi_get_entry_by_keycode(old_keycode))
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clear_bit(old_keycode, dev->keybit);
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return 0;
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}
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return -EINVAL;
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}
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static void msi_wmi_notify(u32 value, void *context)
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{
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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static struct key_entry *key;
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union acpi_object *obj;
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ktime_t cur;
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wmi_get_event_data(value, &response);
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obj = (union acpi_object *)response.pointer;
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if (obj && obj->type == ACPI_TYPE_INTEGER) {
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int eventcode = obj->integer.value;
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dprintk("Eventcode: 0x%x\n", eventcode);
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key = msi_wmi_get_entry_by_scancode(eventcode);
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if (key) {
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cur = ktime_get_real();
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/* Ignore event if the same event happened in a 50 ms
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timeframe -> Key press may result in 10-20 GPEs */
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if (ktime_to_us(ktime_sub(cur, key->last_pressed))
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< 1000 * 50) {
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dprintk("Suppressed key event 0x%X - "
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"Last press was %lld us ago\n",
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key->code,
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ktime_to_us(ktime_sub(cur,
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key->last_pressed)));
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return;
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}
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key->last_pressed = cur;
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switch (key->type) {
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case KE_KEY:
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/* Brightness is served via acpi video driver */
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if (!backlight &&
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(key->keycode == KEY_BRIGHTNESSUP ||
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key->keycode == KEY_BRIGHTNESSDOWN))
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break;
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dprintk("Send key: 0x%X - "
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"Input layer keycode: %d\n", key->code,
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key->keycode);
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input_report_key(msi_wmi_input_dev,
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key->keycode, 1);
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input_sync(msi_wmi_input_dev);
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input_report_key(msi_wmi_input_dev,
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key->keycode, 0);
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input_sync(msi_wmi_input_dev);
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break;
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}
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} else
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printk(KERN_INFO "Unknown key pressed - %x\n",
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eventcode);
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} else
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printk(KERN_INFO DRV_PFX "Unknown event received\n");
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kfree(response.pointer);
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}
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static int __init msi_wmi_input_setup(void)
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{
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struct key_entry *key;
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int err;
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msi_wmi_input_dev = input_allocate_device();
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msi_wmi_input_dev->name = "MSI WMI hotkeys";
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msi_wmi_input_dev->phys = "wmi/input0";
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msi_wmi_input_dev->id.bustype = BUS_HOST;
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msi_wmi_input_dev->getkeycode = msi_wmi_getkeycode;
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msi_wmi_input_dev->setkeycode = msi_wmi_setkeycode;
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for (key = msi_wmi_keymap; key->type != KE_END; key++) {
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switch (key->type) {
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case KE_KEY:
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set_bit(EV_KEY, msi_wmi_input_dev->evbit);
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set_bit(key->keycode, msi_wmi_input_dev->keybit);
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break;
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}
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}
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err = input_register_device(msi_wmi_input_dev);
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if (err) {
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input_free_device(msi_wmi_input_dev);
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return err;
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}
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return 0;
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}
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static int __init msi_wmi_init(void)
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{
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int err;
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if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
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err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
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msi_wmi_notify, NULL);
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if (err)
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return -EINVAL;
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err = msi_wmi_input_setup();
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if (err) {
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wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
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return -EINVAL;
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}
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if (!acpi_video_backlight_support()) {
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backlight = backlight_device_register(DRV_NAME,
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NULL, NULL, &msi_backlight_ops);
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if (IS_ERR(backlight)) {
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wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
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input_unregister_device(msi_wmi_input_dev);
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return -EINVAL;
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}
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backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
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err = bl_get(NULL);
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if (err < 0) {
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wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
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input_unregister_device(msi_wmi_input_dev);
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backlight_device_unregister(backlight);
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return -EINVAL;
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}
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backlight->props.brightness = err;
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}
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}
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printk(KERN_INFO DRV_PFX "Event handler installed\n");
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return 0;
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}
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static void __exit msi_wmi_exit(void)
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{
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if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
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wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
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input_unregister_device(msi_wmi_input_dev);
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backlight_device_unregister(backlight);
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}
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}
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module_init(msi_wmi_init);
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module_exit(msi_wmi_exit);
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