// SPDX-License-Identifier: GPL-2.0+
/*
* Intel HID event & 5 button array driver
*
* Copyright ( C ) 2015 Alex Hung < alex . hung @ canonical . com >
* Copyright ( C ) 2015 Andrew Lutomirski < luto @ kernel . org >
*/
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/string_choices.h>
#include <linux/suspend.h>
#include "../dual_accel_detect.h"
enum intel_hid_tablet_sw_mode {
TABLET_SW_AUTO = -1 ,
TABLET_SW_OFF = 0 ,
TABLET_SW_AT_EVENT,
TABLET_SW_AT_PROBE,
};
static bool enable_5_button_array;
module_param(enable_5_button_array, bool , 0444 );
MODULE_PARM_DESC(enable_5_button_array,
"Enable 5 Button Array support. "
"If you need this please report this to: platform-driver-x86@vger.kernel.org" );
static int enable_sw_tablet_mode = TABLET_SW_AUTO;
module_param(enable_sw_tablet_mode, int , 0444 );
MODULE_PARM_DESC(enable_sw_tablet_mode,
"Enable SW_TABLET_MODE reporting -1:auto 0:off 1:at-first-event 2:at-probe. "
"If you need this please report this to: platform-driver-x86@vger.kernel.org" );
/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
#define TABLET_MODE_FLAG BIT(6 )
MODULE_DESCRIPTION("Intel HID Event hotkey driver" );
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("Alex Hung" );
static const struct acpi_device_id intel_hid_ids[] = {
{ "INT33D5" },
{ "INTC1051" },
{ "INTC1054" },
{ "INTC1070" },
{ "INTC1076" },
{ "INTC1077" },
{ "INTC1078" },
{ "INTC107B" },
{ "INTC10CB" },
{ "INTC10CC" },
{ "INTC10F1" },
{ }
};
MODULE_DEVICE_TABLE(acpi, intel_hid_ids);
/* 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, 0 xC2, { KEY_LEFTMETA } }, /* Press */
{ KE_IGNORE, 0 xC3, { KEY_LEFTMETA } }, /* Release */
{ KE_KEY, 0 xC4, { KEY_VOLUMEUP } }, /* Press */
{ KE_IGNORE, 0 xC5, { KEY_VOLUMEUP } }, /* Release */
{ KE_KEY, 0 xC6, { KEY_VOLUMEDOWN } }, /* Press */
{ KE_IGNORE, 0 xC7, { KEY_VOLUMEDOWN } }, /* Release */
{ KE_KEY, 0 xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */
{ KE_IGNORE, 0 xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* Release */
{ KE_KEY, 0 xCE, { KEY_POWER } }, /* Press */
{ KE_IGNORE, 0 xCF, { 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" ),
},
},
{
.ident = "HP Spectre x2 (2015)" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "HP" ),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable" ),
},
},
{
.ident = "Lenovo ThinkPad X1 Tablet Gen 1" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X12 Detachable Gen 1" ),
},
},
{
.ident = "Lenovo ThinkPad X1 Tablet Gen 2" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2" ),
},
},
{
.ident = "Microsoft Surface Go 3" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation" ),
DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3" ),
},
},
{
.ident = "Microsoft Surface Go 4" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation" ),
DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 4" ),
},
},
{ }
};
/*
* Some convertible use the intel - hid ACPI interface to report SW_TABLET_MODE ,
* these need to be compared via a DMI based authorization list because some
* models have unreliable VGBS return which could cause incorrect
* SW_TABLET_MODE report .
*/
static const struct dmi_system_id dmi_vgbs_allow_list[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "HP" ),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible 15-df0xxx" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation" ),
DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "HP" ),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC" ),
},
},
{ }
};
/*
* Some devices , even non convertible ones , can send incorrect SW_TABLET_MODE
* reports . Accept such reports only from devices in this list .
*/
static const struct dmi_system_id dmi_auto_add_switch[] = {
{
.matches = {
DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */),
},
},
{
.matches = {
DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */),
},
},
{} /* Array terminator */
};
struct intel_hid_priv {
struct input_dev *input_dev;
struct input_dev *array;
struct input_dev *switches;
bool wakeup_mode;
};
#define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054"
enum intel_hid_dsm_fn_codes {
INTEL_HID_DSM_FN_INVALID,
INTEL_HID_DSM_BTNL_FN,
INTEL_HID_DSM_HDMM_FN,
INTEL_HID_DSM_HDSM_FN,
INTEL_HID_DSM_HDEM_FN,
INTEL_HID_DSM_BTNS_FN,
INTEL_HID_DSM_BTNE_FN,
INTEL_HID_DSM_HEBC_V1_FN,
INTEL_HID_DSM_VGBS_FN,
INTEL_HID_DSM_HEBC_V2_FN,
INTEL_HID_DSM_FN_MAX
};
static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = {
NULL,
"BTNL" ,
"HDMM" ,
"HDSM" ,
"HDEM" ,
"BTNS" ,
"BTNE" ,
"HEBC" ,
"VGBS" ,
"HEBC"
};
static unsigned long long intel_hid_dsm_fn_mask;
static guid_t intel_dsm_guid;
static bool intel_hid_execute_method(acpi_handle handle,
enum intel_hid_dsm_fn_codes fn_index,
unsigned long long arg)
{
union acpi_object *obj, argv4, req;
acpi_status status;
char *method_name;
if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
fn_index >= INTEL_HID_DSM_FN_MAX)
return false ;
method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
if (!(intel_hid_dsm_fn_mask & BIT(fn_index)))
goto skip_dsm_exec;
/* All methods expects a package with one integer element */
req.type = ACPI_TYPE_INTEGER;
req.integer.value = arg;
argv4.type = ACPI_TYPE_PACKAGE;
argv4.package.count = 1 ;
argv4.package.elements = &req;
obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1 , fn_index, &argv4);
if (obj) {
acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n" ,
fn_index, method_name);
ACPI_FREE(obj);
return true ;
}
skip_dsm_exec:
status = acpi_execute_simple_method(handle, method_name, arg);
if (ACPI_SUCCESS(status))
return true ;
return false ;
}
static bool intel_hid_evaluate_method(acpi_handle handle,
enum intel_hid_dsm_fn_codes fn_index,
unsigned long long *result)
{
union acpi_object *obj;
acpi_status status;
char *method_name;
if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
fn_index >= INTEL_HID_DSM_FN_MAX)
return false ;
method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
if (!(intel_hid_dsm_fn_mask & BIT(fn_index)))
goto skip_dsm_eval;
obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid,
1 , fn_index,
NULL, ACPI_TYPE_INTEGER);
if (obj) {
*result = obj->integer.value;
acpi_handle_debug(handle,
"Eval DSM Fn code: %d[%s] results: 0x%llx\n" ,
fn_index, method_name, *result);
ACPI_FREE(obj);
return true ;
}
skip_dsm_eval:
status = acpi_evaluate_integer(handle, method_name, NULL, result);
if (ACPI_SUCCESS(status))
return true ;
return false ;
}
static void intel_hid_init_dsm(acpi_handle handle)
{
union acpi_object *obj;
guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid);
obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1 , 0 , NULL,
ACPI_TYPE_BUFFER);
if (obj) {
switch (obj->buffer.length) {
default :
case 2 :
intel_hid_dsm_fn_mask = *(u16 *)obj->buffer.pointer;
break ;
case 1 :
intel_hid_dsm_fn_mask = *obj->buffer.pointer;
break ;
case 0 :
acpi_handle_warn(handle, "intel_hid_dsm_fn_mask length is zero\n" );
intel_hid_dsm_fn_mask = 0 ;
break ;
}
ACPI_FREE(obj);
}
acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n" ,
intel_hid_dsm_fn_mask);
}
static int intel_hid_set_enable(struct device *device, bool enable)
{
acpi_handle handle = ACPI_HANDLE(device);
/* Enable|disable features - power button is always enabled */
if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN, enable)) {
dev_warn(device, "failed to %s hotkeys\n" , str_enable_disable(enable));
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 */
if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN,
enable ? button_cap : 1 ))
dev_warn(device, "failed to set button capability\n" );
}
static int intel_hid_pm_prepare(struct device *device)
{
if (device_may_wakeup(device)) {
struct intel_hid_priv *priv = dev_get_drvdata(device);
priv->wakeup_mode = true ;
}
return 0 ;
}
static void intel_hid_pm_complete(struct device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(device);
priv->wakeup_mode = false ;
}
static int intel_hid_pl_suspend_handler(struct device *device)
{
intel_button_array_enable(device, false );
if (!pm_suspend_no_platform())
intel_hid_set_enable(device, false );
return 0 ;
}
static int intel_hid_pl_resume_handler(struct device *device)
{
intel_hid_pm_complete(device);
if (!pm_suspend_no_platform())
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,
.complete = intel_hid_pm_complete,
.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 int intel_hid_switches_setup(struct platform_device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
/* Setup input device for switches */
priv->switches = devm_input_allocate_device(&device->dev);
if (!priv->switches)
return -ENOMEM;
__set_bit(EV_SW, priv->switches->evbit);
__set_bit(SW_TABLET_MODE, priv->switches->swbit);
priv->switches->name = "Intel HID switches" ;
priv->switches->id.bustype = BUS_HOST;
return input_register_device(priv->switches);
}
static void report_tablet_mode_state(struct platform_device *device)
{
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
acpi_handle handle = ACPI_HANDLE(&device->dev);
unsigned long long vgbs;
int m;
if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_VGBS_FN, &vgbs))
return ;
m = !(vgbs & TABLET_MODE_FLAG);
input_report_switch(priv->switches, SW_TABLET_MODE, m);
input_sync(priv->switches);
}
static bool report_tablet_mode_event(struct input_dev *input_dev, u32 event)
{
if (!input_dev)
return false ;
switch (event) {
case 0 xcc:
input_report_switch(input_dev, SW_TABLET_MODE, 1 );
input_sync(input_dev);
return true ;
case 0 xcd:
input_report_switch(input_dev, SW_TABLET_MODE, 0 );
input_sync(input_dev);
return true ;
default :
return false ;
}
}
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;
struct key_entry *ke;
int err;
/*
* Some convertible have unreliable VGBS return which could cause incorrect
* SW_TABLET_MODE report , in these cases we enable support when receiving
* the first event instead of during driver setup .
*/
if (!priv->switches && enable_sw_tablet_mode == TABLET_SW_AT_EVENT &&
(event == 0 xcc || event == 0 xcd)) {
dev_info(&device->dev, "switch event received, enable switches supports\n" );
err = intel_hid_switches_setup(device);
if (err)
pr_err("Failed to setup Intel HID switches\n" );
}
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
* device object on power button actions while suspended .
*/
if (event == 0 xce)
goto wakeup;
/*
* Some devices send ( duplicate ) tablet - mode events when moved
* around even though the mode has not changed ; and they do this
* even when suspended .
* Update the switch state in case it changed and then return
* without waking up to avoid spurious wakeups .
*/
if (event == 0 xcc || event == 0 xcd) {
report_tablet_mode_event(priv->switches, event);
return ;
}
/* Wake up on 5-button array events only. */
if (event == 0 xc0 || !priv->array)
return ;
ke = sparse_keymap_entry_from_scancode(priv->array, event);
if (!ke) {
dev_info(&device->dev, "unknown event 0x%x\n" , event);
return ;
}
if (ke->type == KE_IGNORE)
return ;
wakeup:
pm_wakeup_hard_event(&device->dev);
return ;
}
/*
* Needed for suspend to work on some platforms that don ' t expose
* the 5 - button array , but still send notifies with power button
* event code to this device object on power button actions .
*
* Report the power button press and release .
*/
if (!priv->array) {
if (event == 0 xce) {
input_report_key(priv->input_dev, KEY_POWER, 1 );
input_sync(priv->input_dev);
return ;
}
if (event == 0 xcf) {
input_report_key(priv->input_dev, KEY_POWER, 0 );
input_sync(priv->input_dev);
return ;
}
}
if (report_tablet_mode_event(priv->switches, event))
return ;
/* 0xC0 is for HID events, other values are for 5 button array */
if (event != 0 xc0) {
if (!priv->array ||
!sparse_keymap_report_event(priv->array, event, 1 , true ))
dev_dbg(&device->dev, "unknown event 0x%x\n" , event);
return ;
}
if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN,
&ev_index)) {
dev_warn(&device->dev, "failed to get event index\n" );
return ;
}
if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1 , true ))
dev_dbg(&device->dev, "unknown event index 0x%llx\n" ,
ev_index);
}
static bool button_array_present(struct platform_device *device)
{
acpi_handle handle = ACPI_HANDLE(&device->dev);
unsigned long long event_cap;
if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN,
&event_cap)) {
/* Check presence of 5 button array or v2 power button */
if (event_cap & 0 x60000)
return true ;
}
if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN,
&event_cap)) {
if (event_cap & 0 x20000)
return true ;
}
if (enable_5_button_array || dmi_check_system(button_array_table))
return true ;
return false ;
}
static int intel_hid_probe(struct platform_device *device)
{
acpi_handle handle = ACPI_HANDLE(&device->dev);
unsigned long long mode, dummy;
struct intel_hid_priv *priv;
acpi_status status;
int err;
intel_hid_init_dsm(handle);
if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) {
dev_warn(&device->dev, "failed to read mode\n" );
return -ENODEV;
}
if (mode != 0 ) {
/*
* This driver only implements " simple " mode . There appear
* to be no other modes , but we should be paranoid and check
* for compatibility .
*/
dev_info(&device->dev, "platform is not in simple mode\n" );
return -ENODEV;
}
priv = devm_kzalloc(&device->dev, sizeof (*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_set_drvdata(&device->dev, priv);
/* See dual_accel_detect.h for more info on the dual_accel check. */
if (enable_sw_tablet_mode == TABLET_SW_AUTO) {
if (dmi_check_system(dmi_vgbs_allow_list))
enable_sw_tablet_mode = TABLET_SW_AT_PROBE;
else if (dmi_check_system(dmi_auto_add_switch) && !dual_accel_detect())
enable_sw_tablet_mode = TABLET_SW_AT_EVENT;
else
enable_sw_tablet_mode = TABLET_SW_OFF;
}
err = intel_hid_input_setup(device);
if (err) {
pr_err("Failed to setup Intel HID hotkeys\n" );
return err;
}
/* Setup 5 button array */
if (button_array_present(device)) {
dev_info(&device->dev, "platform supports 5 button array\n" );
err = intel_button_array_input_setup(device);
if (err)
pr_err("Failed to setup Intel 5 button array hotkeys\n" );
}
/* Setup switches for devices that we know VGBS return correctly */
if (enable_sw_tablet_mode == TABLET_SW_AT_PROBE) {
dev_info(&device->dev, "platform supports switches\n" );
err = intel_hid_switches_setup(device);
if (err)
pr_err("Failed to setup Intel HID switches\n" );
else
report_tablet_mode_state(device);
}
status = acpi_install_notify_handler(handle,
ACPI_DEVICE_NOTIFY,
notify_handler,
device);
if (ACPI_FAILURE(status))
return -EBUSY;
err = intel_hid_set_enable(&device->dev, true );
if (err)
goto err_remove_notify;
intel_button_array_enable(&device->dev, true );
/*
* Call button load method to enable HID power button
* Always do this since it activates events on some devices without
* a button array too .
*/
if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN, &dummy))
dev_warn(&device->dev, "failed to enable HID power button\n" );
device_init_wakeup(&device->dev, true );
/*
* In order for system wakeup to work , the EC GPE has to be marked as
* a wakeup one , so do that here ( this setting will persist , but it has
* no effect until the wakeup mask is set for the EC GPE ) .
*/
acpi_ec_mark_gpe_for_wake();
return 0 ;
err_remove_notify:
acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
return err;
}
static void intel_hid_remove(struct platform_device *device)
{
acpi_handle handle = ACPI_HANDLE(&device->dev);
device_init_wakeup(&device->dev, false );
acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
intel_hid_set_enable(&device->dev, false );
intel_button_array_enable(&device->dev, false );
}
static struct platform_driver intel_hid_pl_driver = {
.driver = {
.name = "intel-hid" ,
.acpi_match_table = intel_hid_ids,
.pm = &intel_hid_pl_pm_ops,
},
.probe = intel_hid_probe,
.remove = intel_hid_remove,
};
/*
* Unfortunately , some laptops provide a _ HID = " INT33D5 " device with
* _ CID = " PNP0C02 " . This causes the pnpacpi scan driver to claim the
* ACPI node , so no platform device will be created . The pnpacpi
* driver rejects this device in subsequent processing , so no physical
* node is created at all .
*
* As a workaround until the ACPI core figures out how to handle
* this corner case , manually ask the ACPI platform device code to
* claim the ACPI node .
*/
static acpi_status __init
check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
{
const struct acpi_device_id *ids = context;
struct acpi_device *dev = acpi_fetch_acpi_dev(handle);
if (dev && acpi_match_device_ids(dev, ids) == 0 )
if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL)))
dev_info(&dev->dev,
"intel-hid: created platform device\n" );
return AE_OK;
}
static int __init intel_hid_init(void )
{
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, check_acpi_dev, NULL,
(void *)intel_hid_ids, NULL);
return platform_driver_register(&intel_hid_pl_driver);
}
module_init(intel_hid_init);
static void __exit intel_hid_exit(void )
{
platform_driver_unregister(&intel_hid_pl_driver);
}
module_exit(intel_hid_exit);
Messung V0.5 in Prozent C=94 H=90 G=91
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