| /* |
| * 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"); |
| |
| #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); |