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|
/*
* Intel HID event & 5 button array driver
*
* Copyright (C) 2015 Alex Hung <alex.hung@canonical.com>
* Copyright (C) 2015 Andrew Lutomirski <luto@kernel.org>
*
* 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/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>
#include <linux/dmi.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alex Hung");
static const struct acpi_device_id intel_hid_ids[] = {
{"INT33D5", 0},
{"", 0},
};
/* In theory, these are HID usages. */
static const struct key_entry intel_hid_keymap[] = {
/* 1: LSuper (Page 0x07, usage 0xE3) -- unclear what to do */
/* 2: Toggle SW_ROTATE_LOCK -- easy to implement if seen in wild */
{ KE_KEY, 3, { KEY_NUMLOCK } },
{ KE_KEY, 4, { KEY_HOME } },
{ KE_KEY, 5, { KEY_END } },
{ KE_KEY, 6, { KEY_PAGEUP } },
{ KE_KEY, 7, { KEY_PAGEDOWN } },
{ KE_KEY, 8, { KEY_RFKILL } },
{ KE_KEY, 9, { KEY_POWER } },
{ KE_KEY, 11, { KEY_SLEEP } },
/* 13 has two different meanings in the spec -- ignore it. */
{ KE_KEY, 14, { KEY_STOPCD } },
{ KE_KEY, 15, { KEY_PLAYPAUSE } },
{ KE_KEY, 16, { KEY_MUTE } },
{ KE_KEY, 17, { KEY_VOLUMEUP } },
{ KE_KEY, 18, { KEY_VOLUMEDOWN } },
{ KE_KEY, 19, { KEY_BRIGHTNESSUP } },
{ KE_KEY, 20, { KEY_BRIGHTNESSDOWN } },
/* 27: wake -- needs special handling */
{ KE_END },
};
/* 5 button array notification value. */
static const struct key_entry intel_array_keymap[] = {
{ KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* Press */
{ KE_IGNORE, 0xC3, { KEY_LEFTMETA } }, /* Release */
{ KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* Press */
{ KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* Release */
{ KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* Press */
{ KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* Release */
{ KE_SW, 0xC8, { .sw = { SW_ROTATE_LOCK, 1 } } }, /* Press */
{ KE_SW, 0xC9, { .sw = { SW_ROTATE_LOCK, 0 } } }, /* Release */
{ KE_KEY, 0xCE, { KEY_POWER } }, /* Press */
{ KE_IGNORE, 0xCF, { KEY_POWER } }, /* Release */
{ KE_END },
};
static const struct dmi_system_id button_array_table[] = {
{
.ident = "Wacom MobileStudio Pro 13",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"),
DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 13"),
},
},
{
.ident = "Wacom MobileStudio Pro 16",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"),
DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 16"),
},
},
{ }
};
struct intel_hid_priv {
struct input_dev *input_dev;
struct input_dev *array;
bool wakeup_mode;
};
static int intel_hid_set_enable(struct device *device, bool enable)
{
acpi_status status;
status = acpi_execute_simple_method(ACPI_HANDLE(device), "HDSM",
enable);
if (ACPI_FAILURE(status)) {
dev_warn(device, "failed to %sable hotkeys\n",
enable ? "en" : "dis");
return -EIO;
}
return 0;
}
static void intel_button_array_enable(struct device *device, bool enable)
{
struct intel_hid_priv *priv = dev_get_drvdata(device);
acpi_handle handle = ACPI_HANDLE(device);
unsigned long long button_cap;
acpi_status status;
if (!priv->array)
return;
/* Query supported platform features */
status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap);
if (ACPI_FAILURE(status)) {
dev_warn(device, "failed to get button capability\n");
return;
}
/* Enable|disable features - power button is always enabled */
status = acpi_execute_simple_method(handle, "BTNE",
enable ? button_cap : 1);
if (ACPI_FAILURE(status))
dev_warn(device, "failed to set button capability\n");
}
static int intel_hid_pm_prepare(struct device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(device);
priv->wakeup_mode = true;
return 0;
}
static int intel_hid_pl_suspend_handler(struct device *device)
{
if (pm_suspend_via_firmware()) {
intel_hid_set_enable(device, false);
intel_button_array_enable(device, false);
}
return 0;
}
static int intel_hid_pl_resume_handler(struct device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(device);
priv->wakeup_mode = false;
if (pm_resume_via_firmware()) {
intel_hid_set_enable(device, true);
intel_button_array_enable(device, true);
}
return 0;
}
static const struct dev_pm_ops intel_hid_pl_pm_ops = {
.prepare = intel_hid_pm_prepare,
.freeze = intel_hid_pl_suspend_handler,
.thaw = intel_hid_pl_resume_handler,
.restore = intel_hid_pl_resume_handler,
.suspend = intel_hid_pl_suspend_handler,
.resume = intel_hid_pl_resume_handler,
};
static int intel_hid_input_setup(struct platform_device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
int ret;
priv->input_dev = devm_input_allocate_device(&device->dev);
if (!priv->input_dev)
return -ENOMEM;
ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL);
if (ret)
return ret;
priv->input_dev->name = "Intel HID events";
priv->input_dev->id.bustype = BUS_HOST;
return input_register_device(priv->input_dev);
}
static int intel_button_array_input_setup(struct platform_device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
int ret;
/* Setup input device for 5 button array */
priv->array = devm_input_allocate_device(&device->dev);
if (!priv->array)
return -ENOMEM;
ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL);
if (ret)
return ret;
priv->array->name = "Intel HID 5 button array";
priv->array->id.bustype = BUS_HOST;
return input_register_device(priv->array);
}
static void notify_handler(acpi_handle handle, u32 event, void *context)
{
struct platform_device *device = context;
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
unsigned long long ev_index;
acpi_status status;
if (priv->wakeup_mode) {
/*
* Needed for wakeup from suspend-to-idle to work on some
* platforms that don't expose the 5-button array, but still
* send notifies with the power button event code to this
|