M: Alex Hung <alex.hung@canonical.com>
L: platform-driver-x86@vger.kernel.org
S: Maintained
-F: drivers/platform/x86/intel-hid.c
+F: drivers/platform/x86/intel/hid.c
INTEL I/OAT DMA DRIVER
M: Dave Jiang <dave.jiang@intel.com>
source "drivers/platform/x86/intel/Kconfig"
-config INTEL_HID_EVENT
- tristate "INTEL HID Event"
- depends on ACPI
- depends on INPUT
- depends on I2C
- select INPUT_SPARSEKMAP
- help
- This driver provides support for the Intel HID Event hotkey interface.
- Some laptops require this driver for hotkey support.
-
- To compile this driver as a module, choose M here: the module will
- be called intel_hid.
-
config INTEL_INT0002_VGPIO
tristate "Intel ACPI INT0002 Virtual GPIO driver"
depends on GPIOLIB && ACPI && PM_SLEEP
# Intel
obj-$(CONFIG_X86_PLATFORM_DRIVERS_INTEL) += intel/
-obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
+++ /dev/null
-// 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/suspend.h>
-#include "dual_accel_detect.h"
-
-/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
-#define TABLET_MODE_FLAG BIT(6)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alex Hung");
-
-static const struct acpi_device_id intel_hid_ids[] = {
- {"INT33D5", 0},
- {"INTC1051", 0},
- {"INTC1054", 0},
- {"INTC1070", 0},
- {"", 0},
-};
-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, 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_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */
- { KE_IGNORE, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* 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"),
- },
- },
- {
- .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 2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
- },
- },
- { }
-};
-
-/*
- * 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"),
- },
- },
- { }
-};
-
-struct intel_hid_priv {
- struct input_dev *input_dev;
- struct input_dev *array;
- struct input_dev *switches;
- bool wakeup_mode;
- bool dual_accel;
-};
-
-#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 & 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 %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 */
- 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 0xcc:
- input_report_switch(input_dev, SW_TABLET_MODE, 1);
- input_sync(input_dev);
- return true;
- case 0xcd:
- 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;
- 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.
- *
- * See dual_accel_detect.h for more info on the dual_accel check.
- */
- if (!priv->switches && !priv->dual_accel && (event == 0xcc || event == 0xcd)) {
- 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 == 0xce)
- 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 == 0xcc || event == 0xcd) {
- report_tablet_mode_event(priv->switches, event);
- return;
- }
-
- /* Wake up on 5-button array events only. */
- if (event == 0xc0 || !priv->array)
- return;
-
- if (!sparse_keymap_entry_from_scancode(priv->array, event)) {
- dev_info(&device->dev, "unknown event 0x%x\n", event);
- 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 == 0xce) {
- input_report_key(priv->input_dev, KEY_POWER, 1);
- input_sync(priv->input_dev);
- return;
- }
-
- if (event == 0xcf) {
- 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 != 0xc0) {
- 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 & 0x60000)
- return true;
- }
-
- if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN,
- &event_cap)) {
- if (event_cap & 0x20000)
- return true;
- }
-
- if (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;
- 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);
-
- priv->dual_accel = dual_accel_detect();
-
- 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 (dmi_check_system(dmi_vgbs_allow_list)) {
- 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;
-
- if (priv->array) {
- unsigned long long dummy;
-
- intel_button_array_enable(&device->dev, true);
-
- /* Call button load method to enable HID power button */
- 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 int 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);
-
- /*
- * Even if we failed to shut off the event stream, we can still
- * safely detach from the device.
- */
- return 0;
-}
-
-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;
-
- if (acpi_bus_get_device(handle, &dev) != 0)
- return AE_OK;
-
- if (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);
source "drivers/platform/x86/intel/speed_select_if/Kconfig"
source "drivers/platform/x86/intel/telemetry/Kconfig"
+config INTEL_HID_EVENT
+ tristate "Intel HID Event"
+ depends on ACPI
+ depends on INPUT
+ depends on I2C
+ select INPUT_SPARSEKMAP
+ help
+ This driver provides support for the Intel HID Event hotkey interface.
+ Some laptops require this driver for hotkey support.
+
+ To compile this driver as a module, choose M here: the module will
+ be called intel_hid.
+
config INTEL_BXTWC_PMIC_TMU
tristate "Intel Broxton Whiskey Cove TMU Driver"
depends on INTEL_SOC_PMIC_BXTWC
obj-$(CONFIG_INTEL_SPEED_SELECT_INTERFACE) += speed_select_if/
obj-$(CONFIG_INTEL_TELEMETRY) += telemetry/
+# Intel input drivers
+intel-hid-y := hid.o
+obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
+
# Intel PMIC / PMC / P-Unit drivers
intel_bxtwc_tmu-y := bxtwc_tmu.o
obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU) += intel_bxtwc_tmu.o
--- /dev/null
+// 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/suspend.h>
+#include "../dual_accel_detect.h"
+
+/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
+#define TABLET_MODE_FLAG BIT(6)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alex Hung");
+
+static const struct acpi_device_id intel_hid_ids[] = {
+ {"INT33D5", 0},
+ {"INTC1051", 0},
+ {"INTC1054", 0},
+ {"INTC1070", 0},
+ {"", 0},
+};
+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, 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_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */
+ { KE_IGNORE, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* 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"),
+ },
+ },
+ {
+ .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 2",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
+ },
+ },
+ { }
+};
+
+/*
+ * 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"),
+ },
+ },
+ { }
+};
+
+struct intel_hid_priv {
+ struct input_dev *input_dev;
+ struct input_dev *array;
+ struct input_dev *switches;
+ bool wakeup_mode;
+ bool dual_accel;
+};
+
+#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 & 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 %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 */
+ 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 0xcc:
+ input_report_switch(input_dev, SW_TABLET_MODE, 1);
+ input_sync(input_dev);
+ return true;
+ case 0xcd:
+ 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;
+ 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.
+ *
+ * See dual_accel_detect.h for more info on the dual_accel check.
+ */
+ if (!priv->switches && !priv->dual_accel && (event == 0xcc || event == 0xcd)) {
+ 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 == 0xce)
+ 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 == 0xcc || event == 0xcd) {
+ report_tablet_mode_event(priv->switches, event);
+ return;
+ }
+
+ /* Wake up on 5-button array events only. */
+ if (event == 0xc0 || !priv->array)
+ return;
+
+ if (!sparse_keymap_entry_from_scancode(priv->array, event)) {
+ dev_info(&device->dev, "unknown event 0x%x\n", event);
+ 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 == 0xce) {
+ input_report_key(priv->input_dev, KEY_POWER, 1);
+ input_sync(priv->input_dev);
+ return;
+ }
+
+ if (event == 0xcf) {
+ 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 != 0xc0) {
+ 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 & 0x60000)
+ return true;
+ }
+
+ if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN,
+ &event_cap)) {
+ if (event_cap & 0x20000)
+ return true;
+ }
+
+ if (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;
+ 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);
+
+ priv->dual_accel = dual_accel_detect();
+
+ 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 (dmi_check_system(dmi_vgbs_allow_list)) {
+ 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;
+
+ if (priv->array) {
+ unsigned long long dummy;
+
+ intel_button_array_enable(&device->dev, true);
+
+ /* Call button load method to enable HID power button */
+ 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 int 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);
+
+ /*
+ * Even if we failed to shut off the event stream, we can still
+ * safely detach from the device.
+ */
+ return 0;
+}
+
+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;
+
+ if (acpi_bus_get_device(handle, &dev) != 0)
+ return AE_OK;
+
+ if (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);
projects / linux.git / commitdiff