forked from Minki/linux
intel-hid: new hid event driver for hotkeys
This driver supports various HID events including hotkeys. Dell XPS 13 9350 requires it for the wireless hotkey. Signed-off-by: Alex Hung <alex.hung@canonical.com> Reviewed-and-tested-by: Andy Lutomirski <luto@kernel.org> [dvhart: Kconfig help typo fix and INPUT_SPARSEKMAP fix from Sedat Dilek] Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Alex Hung
Darren Hart
parent
800f20170d
commit
ecc83e52b2
@ -5498,6 +5498,12 @@ T: git git://git.code.sf.net/p/intel-sas/isci
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S: Supported
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F: drivers/scsi/isci/
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INTEL HID EVENT DRIVER
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M: Alex Hung <alex.hung@canonical.com>
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L: platform-driver-x86@vger.kernel.org
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S: Maintained
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F: drivers/platform/x86/intel-hid.c
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INTEL IDLE DRIVER
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M: Len Brown <lenb@kernel.org>
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L: linux-pm@vger.kernel.org
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@ -732,6 +732,18 @@ config ACPI_CMPC
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keys as input device, backlight device, tablet and accelerometer
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devices.
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config INTEL_HID_EVENT
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tristate "INTEL HID Event"
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depends on ACPI
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depends on INPUT
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select INPUT_SPARSEKMAP
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help
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This driver provides support for the Intel HID Event hotkey interface.
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Some laptops require this driver for hotkey support.
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To compile this driver as a module, choose M here: the module will
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be called intel_hid.
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config INTEL_SCU_IPC
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bool "Intel SCU IPC Support"
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depends on X86_INTEL_MID
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@ -41,6 +41,7 @@ obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
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obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o
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obj-$(CONFIG_TOSHIBA_HAPS) += toshiba_haps.o
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obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o
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obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
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obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o
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obj-$(CONFIG_INTEL_SCU_IPC_UTIL) += intel_scu_ipcutil.o
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obj-$(CONFIG_INTEL_MFLD_THERMAL) += intel_mid_thermal.o
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289
drivers/platform/x86/intel-hid.c
Normal file
289
drivers/platform/x86/intel-hid.c
Normal file
@ -0,0 +1,289 @@
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/*
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* Intel HID event driver for Windows 8
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*
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* Copyright (C) 2015 Alex Hung <alex.hung@canonical.com>
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* Copyright (C) 2015 Andrew Lutomirski <luto@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/acpi.h>
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#include <acpi/acpi_bus.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Alex Hung");
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static const struct acpi_device_id intel_hid_ids[] = {
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{"INT33D5", 0},
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{"", 0},
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};
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/* In theory, these are HID usages. */
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static const struct key_entry intel_hid_keymap[] = {
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/* 1: LSuper (Page 0x07, usage 0xE3) -- unclear what to do */
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/* 2: Toggle SW_ROTATE_LOCK -- easy to implement if seen in wild */
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{ KE_KEY, 3, { KEY_NUMLOCK } },
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{ KE_KEY, 4, { KEY_HOME } },
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{ KE_KEY, 5, { KEY_END } },
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{ KE_KEY, 6, { KEY_PAGEUP } },
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{ KE_KEY, 4, { KEY_PAGEDOWN } },
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{ KE_KEY, 4, { KEY_HOME } },
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{ KE_KEY, 8, { KEY_RFKILL } },
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{ KE_KEY, 9, { KEY_POWER } },
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{ KE_KEY, 11, { KEY_SLEEP } },
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/* 13 has two different meanings in the spec -- ignore it. */
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{ KE_KEY, 14, { KEY_STOPCD } },
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{ KE_KEY, 15, { KEY_PLAYPAUSE } },
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{ KE_KEY, 16, { KEY_MUTE } },
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{ KE_KEY, 17, { KEY_VOLUMEUP } },
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{ KE_KEY, 18, { KEY_VOLUMEDOWN } },
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{ KE_KEY, 19, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 20, { KEY_BRIGHTNESSDOWN } },
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/* 27: wake -- needs special handling */
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{ KE_END },
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};
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struct intel_hid_priv {
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struct input_dev *input_dev;
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};
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static int intel_hid_set_enable(struct device *device, int enable)
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{
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union acpi_object arg0 = { ACPI_TYPE_INTEGER };
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struct acpi_object_list args = { 1, &arg0 };
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acpi_status status;
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arg0.integer.value = enable;
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status = acpi_evaluate_object(ACPI_HANDLE(device), "HDSM", &args, NULL);
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if (!ACPI_SUCCESS(status)) {
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dev_warn(device, "failed to %sable hotkeys\n",
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enable ? "en" : "dis");
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return -EIO;
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}
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return 0;
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}
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static int intel_hid_pl_suspend_handler(struct device *device)
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{
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intel_hid_set_enable(device, 0);
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return 0;
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}
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static int intel_hid_pl_resume_handler(struct device *device)
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{
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intel_hid_set_enable(device, 1);
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return 0;
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}
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static const struct dev_pm_ops intel_hid_pl_pm_ops = {
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.suspend = intel_hid_pl_suspend_handler,
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.resume = intel_hid_pl_resume_handler,
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};
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static int intel_hid_input_setup(struct platform_device *device)
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{
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struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
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int ret;
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priv->input_dev = input_allocate_device();
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if (!priv->input_dev)
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return -ENOMEM;
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ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL);
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if (ret)
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goto err_free_device;
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priv->input_dev->dev.parent = &device->dev;
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priv->input_dev->name = "Intel HID events";
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priv->input_dev->id.bustype = BUS_HOST;
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set_bit(KEY_RFKILL, priv->input_dev->keybit);
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ret = input_register_device(priv->input_dev);
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if (ret)
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goto err_free_device;
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return 0;
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err_free_device:
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input_free_device(priv->input_dev);
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return ret;
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}
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static void intel_hid_input_destroy(struct platform_device *device)
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{
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struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
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input_unregister_device(priv->input_dev);
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}
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static void notify_handler(acpi_handle handle, u32 event, void *context)
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{
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struct platform_device *device = context;
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struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
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unsigned long long ev_index;
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acpi_status status;
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/* The platform spec only defines one event code: 0xC0. */
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if (event != 0xc0) {
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dev_warn(&device->dev, "received unknown event (0x%x)\n",
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event);
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return;
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}
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status = acpi_evaluate_integer(handle, "HDEM", NULL, &ev_index);
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if (!ACPI_SUCCESS(status)) {
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dev_warn(&device->dev, "failed to get event index\n");
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return;
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}
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if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true))
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dev_info(&device->dev, "unknown event index 0x%llx\n",
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ev_index);
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}
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static int intel_hid_probe(struct platform_device *device)
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{
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acpi_handle handle = ACPI_HANDLE(&device->dev);
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struct intel_hid_priv *priv;
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unsigned long long mode;
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acpi_status status;
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int err;
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status = acpi_evaluate_integer(handle, "HDMM", NULL, &mode);
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if (!ACPI_SUCCESS(status)) {
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dev_warn(&device->dev, "failed to read mode\n");
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return -ENODEV;
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}
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if (mode != 0) {
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/*
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* This driver only implements "simple" mode. There appear
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* to be no other modes, but we should be paranoid and check
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* for compatibility.
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*/
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dev_info(&device->dev, "platform is not in simple mode\n");
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return -ENODEV;
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}
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priv = devm_kzalloc(&device->dev,
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sizeof(struct intel_hid_priv *), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev_set_drvdata(&device->dev, priv);
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err = intel_hid_input_setup(device);
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if (err) {
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pr_err("Failed to setup Intel HID hotkeys\n");
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return err;
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}
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status = acpi_install_notify_handler(handle,
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ACPI_DEVICE_NOTIFY,
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notify_handler,
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device);
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if (ACPI_FAILURE(status)) {
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err = -EBUSY;
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goto err_remove_input;
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}
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err = intel_hid_set_enable(&device->dev, 1);
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if (err)
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goto err_remove_notify;
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return 0;
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err_remove_notify:
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acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
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err_remove_input:
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intel_hid_input_destroy(device);
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return err;
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}
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static int intel_hid_remove(struct platform_device *device)
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{
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acpi_handle handle = ACPI_HANDLE(&device->dev);
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acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
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intel_hid_input_destroy(device);
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intel_hid_set_enable(&device->dev, 0);
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acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
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/*
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* Even if we failed to shut off the event stream, we can still
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* safely detach from the device.
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*/
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return 0;
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}
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static struct platform_driver intel_hid_pl_driver = {
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.driver = {
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.name = "intel-hid",
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.acpi_match_table = intel_hid_ids,
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.pm = &intel_hid_pl_pm_ops,
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},
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.probe = intel_hid_probe,
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.remove = intel_hid_remove,
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};
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MODULE_DEVICE_TABLE(acpi, intel_hid_ids);
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/*
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* Unfortunately, some laptops provide a _HID="INT33D5" device with
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* _CID="PNP0C02". This causes the pnpacpi scan driver to claim the
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* ACPI node, so no platform device will be created. The pnpacpi
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* driver rejects this device in subsequent processing, so no physical
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* node is created at all.
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*
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* As a workaround until the ACPI core figures out how to handle
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* this corner case, manually ask the ACPI platform device code to
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* claim the ACPI node.
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*/
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static acpi_status __init
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check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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const struct acpi_device_id *ids = context;
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struct acpi_device *dev;
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if (acpi_bus_get_device(handle, &dev) != 0)
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return AE_OK;
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if (acpi_match_device_ids(dev, ids) == 0)
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if (acpi_create_platform_device(dev))
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dev_info(&dev->dev,
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"intel-hid: created platform device\n");
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return AE_OK;
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}
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static int __init intel_hid_init(void)
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{
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acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, check_acpi_dev, NULL,
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(void *)intel_hid_ids, NULL);
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return platform_driver_register(&intel_hid_pl_driver);
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}
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module_init(intel_hid_init);
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static void __exit intel_hid_exit(void)
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{
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platform_driver_unregister(&intel_hid_pl_driver);
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}
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module_exit(intel_hid_exit);
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