diff options
Diffstat (limited to 'drivers/platform/x86/intel-vbtn.c')
| -rw-r--r-- | drivers/platform/x86/intel-vbtn.c | 65 |
1 files changed, 47 insertions, 18 deletions
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index 58c5ff36523a..b703d6f5b099 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -1,30 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Intel Virtual Button driver for Windows 8.1+ * * Copyright (C) 2016 AceLan Kao <acelan.kao@canonical.com> * Copyright (C) 2016 Alex Hung <alex.hung@canonical.com> - * - * 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. - * */ +#include <linux/acpi.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/init.h> -#include <linux/input.h> #include <linux/platform_device.h> -#include <linux/input/sparse-keymap.h> -#include <linux/acpi.h> #include <linux/suspend.h> -#include <acpi/acpi_bus.h> + +/* When NOT in tablet mode, VGBS returns with the flag 0x40 */ +#define TABLET_MODE_FLAG 0x40 MODULE_LICENSE("GPL"); MODULE_AUTHOR("AceLan Kao"); @@ -38,10 +29,16 @@ static const struct acpi_device_id intel_vbtn_ids[] = { static const struct key_entry intel_vbtn_keymap[] = { { KE_KEY, 0xC0, { KEY_POWER } }, /* power key press */ { KE_IGNORE, 0xC1, { KEY_POWER } }, /* power key release */ + { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* 'Windows' key press */ + { KE_KEY, 0xC3, { KEY_LEFTMETA } }, /* 'Windows' key release */ { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* volume-up key press */ { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* volume-up key release */ { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* volume-down key press */ { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* volume-down key release */ + { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key press */ + { KE_KEY, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key release */ + { KE_SW, 0xCC, { .sw = { SW_TABLET_MODE, 1 } } }, /* Tablet */ + { KE_SW, 0xCD, { .sw = { SW_TABLET_MODE, 0 } } }, /* Laptop */ { KE_END }, }; @@ -74,20 +71,35 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) { struct platform_device *device = context; struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev); + unsigned int val = !(event & 1); /* Even=press, Odd=release */ + const struct key_entry *ke_rel; + bool autorelease; if (priv->wakeup_mode) { if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) { pm_wakeup_hard_event(&device->dev); return; } - } else if (sparse_keymap_report_event(priv->input_dev, event, 1, true)) { - return; + goto out_unknown; } + + /* + * Even press events are autorelease if there is no corresponding odd + * release event, or if the odd event is KE_IGNORE. + */ + ke_rel = sparse_keymap_entry_from_scancode(priv->input_dev, event | 1); + autorelease = val && (!ke_rel || ke_rel->type == KE_IGNORE); + + if (sparse_keymap_report_event(priv->input_dev, event, val, autorelease)) + return; + +out_unknown: dev_dbg(&device->dev, "unknown event index 0x%x\n", event); } static int intel_vbtn_probe(struct platform_device *device) { + struct acpi_buffer vgbs_output = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_handle handle = ACPI_HANDLE(&device->dev); struct intel_vbtn_priv *priv; acpi_status status; @@ -110,6 +122,23 @@ static int intel_vbtn_probe(struct platform_device *device) return err; } + /* + * VGBS being present and returning something means we have + * a tablet mode switch. + */ + status = acpi_evaluate_object(handle, "VGBS", NULL, &vgbs_output); + if (ACPI_SUCCESS(status)) { + union acpi_object *obj = vgbs_output.pointer; + + if (obj && obj->type == ACPI_TYPE_INTEGER) { + int m = !(obj->integer.value & TABLET_MODE_FLAG); + + input_report_switch(priv->input_dev, SW_TABLET_MODE, m); + } + } + + kfree(vgbs_output.pointer); + status = acpi_install_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler, |