/* * MSI WMI hotkeys * * Copyright (C) 2009 Novell * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include MODULE_AUTHOR("Thomas Renninger "); 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 MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45" #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2" #define SCANCODE_BASE 0xD0 #define MSI_WMI_BRIGHTNESSUP SCANCODE_BASE #define MSI_WMI_BRIGHTNESSDOWN (SCANCODE_BASE + 1) #define MSI_WMI_VOLUMEUP (SCANCODE_BASE + 2) #define MSI_WMI_VOLUMEDOWN (SCANCODE_BASE + 3) #define MSI_WMI_MUTE (SCANCODE_BASE + 4) 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_KEY, MSI_WMI_MUTE, {KEY_MUTE} }, { KE_END, 0} }; static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1]; static 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) { pr_err("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 }; pr_debug("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) { pr_err("Could not query backlight: %d\n", err); return -EINVAL; } pr_debug("Get: Query block returned: %d\n", ret); for (level = 0; level < ARRAY_SIZE(backlight_map); level++) { if (backlight_map[level] == ret) { pr_debug("Current backlight level: 0x%X - index: %d\n", backlight_map[level], level); break; } } if (level == ARRAY_SIZE(backlight_map)) { pr_err("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 const 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; acpi_status status; status = wmi_get_event_data(value, &response); if (status != AE_OK) { pr_info("bad event status 0x%x\n", status); return; } obj = (union acpi_object *)response.pointer; if (obj && obj->type == ACPI_TYPE_INTEGER) { int eventcode = obj->integer.value; pr_debug("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 - SCANCODE_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) { pr_debug("Suppressed key event 0x%X - " "Last press was %lld us ago\n", key->code, ktime_to_us(diff)); return; } last_pressed[key->code - SCANCODE_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))) { pr_debug("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 pr_info("Unknown key pressed - %x\n", eventcode); } else pr_info("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)) { pr_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 (ACPI_FAILURE(err)) return -EINVAL; err = msi_wmi_input_setup(); if (err) goto err_uninstall_notifier; if (!acpi_video_backlight_support()) { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_PLATFORM; props.max_brightness = ARRAY_SIZE(backlight_map) - 1; backlight = backlight_device_register(DRV_NAME, NULL, NULL, &msi_backlight_ops, &props); if (IS_ERR(backlight)) { err = PTR_ERR(backlight); goto err_free_input; } err = bl_get(NULL); if (err < 0) goto err_free_backlight; backlight->props.brightness = err; } pr_debug("Event handler installed\n"); return 0; err_free_backlight: backlight_device_unregister(backlight); err_free_input: sparse_keymap_free(msi_wmi_input_dev); 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);