/* * 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 */ #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"); /* 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) struct key_entry { char type; /* See KE_* below */ u16 code; u16 keycode; ktime_t last_pressed; }; /* * KE_KEY the only used key type, but keep this, others might also * show up in the future. Compare with hp-wmi.c */ enum { KE_KEY, KE_END }; static struct key_entry msi_wmi_keymap[] = { { KE_KEY, 0xd0, KEY_BRIGHTNESSUP, {0, } }, { KE_KEY, 0xd1, KEY_BRIGHTNESSDOWN, {0, } }, { KE_KEY, 0xd2, KEY_VOLUMEUP, {0, } }, { KE_KEY, 0xd3, KEY_VOLUMEDOWN, {0, } }, { KE_END, 0} }; 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 = 0; /* 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); 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 struct key_entry *msi_wmi_get_entry_by_scancode(int code) { struct key_entry *key; for (key = msi_wmi_keymap; key->type != KE_END; key++) if (code == key->code) return key; return NULL; } static struct key_entry *msi_wmi_get_entry_by_keycode(int keycode) { struct key_entry *key; for (key = msi_wmi_keymap; key->type != KE_END; key++) if (key->type == KE_KEY && keycode == key->keycode) return key; return NULL; } static int msi_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) { struct key_entry *key = msi_wmi_get_entry_by_scancode(scancode); if (key && key->type == KE_KEY) { *keycode = key->keycode; return 0; } return -EINVAL; } static int msi_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) { struct key_entry *key; int old_keycode; if (keycode < 0 || keycode > KEY_MAX) return -EINVAL; key = msi_wmi_get_entry_by_scancode(scancode); if (key && key->type == KE_KEY) { old_keycode = key->keycode; key->keycode = keycode; set_bit(keycode, dev->keybit); if (!msi_wmi_get_entry_by_keycode(old_keycode)) clear_bit(old_keycode, dev->keybit); return 0; } return -EINVAL; } 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 = msi_wmi_get_entry_by_scancode(eventcode); if (key) { cur = ktime_get_real(); /* Ignore event if the same event happened in a 50 ms timeframe -> Key press may result in 10-20 GPEs */ if (ktime_to_us(ktime_sub(cur, key->last_pressed)) < 1000 * 50) { dprintk("Suppressed key event 0x%X - " "Last press was %lld us ago\n", key->code, ktime_to_us(ktime_sub(cur, key->last_pressed))); return; } key->last_pressed = cur; switch (key->type) { case KE_KEY: /* Brightness is served via acpi video driver */ if (!backlight && (key->keycode == KEY_BRIGHTNESSUP || key->keycode == KEY_BRIGHTNESSDOWN)) break; dprintk("Send key: 0x%X - " "Input layer keycode: %d\n", key->code, key->keycode); input_report_key(msi_wmi_input_dev, key->keycode, 1); input_sync(msi_wmi_input_dev); input_report_key(msi_wmi_input_dev, key->keycode, 0); input_sync(msi_wmi_input_dev); break; } } 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) { struct key_entry *key; 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; msi_wmi_input_dev->getkeycode = msi_wmi_getkeycode; msi_wmi_input_dev->setkeycode = msi_wmi_setkeycode; for (key = msi_wmi_keymap; key->type != KE_END; key++) { switch (key->type) { case KE_KEY: set_bit(EV_KEY, msi_wmi_input_dev->evbit); set_bit(key->keycode, msi_wmi_input_dev->keybit); break; } } err = input_register_device(msi_wmi_input_dev); if (err) { input_free_device(msi_wmi_input_dev); return err; } return 0; } 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); input_unregister_device(msi_wmi_input_dev); backlight_device_unregister(backlight); } } module_init(msi_wmi_init); module_exit(msi_wmi_exit);