* [PATCH v5 1/6] platform/x86: huawei-wmi: Move to platform driver
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 2/6] platform/x86: huawei-wmi: Add quirks and module parameters Ayman Bagabas
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Sinan Kaya, Mauro Carvalho Chehab,
Rafael J. Wysocki, Takashi Iwai, Ayman Bagabas, Stuart Hayes,
Matan Ziv-Av, Hans de Goede, Peng Hao, Krzysztof Kozlowski,
Mattias Jacobsson, platform-driver-x86, linux-kernel
Move from WMI driver to platform driver. This move is necessary since
the driver is no longer a hotkeys driver only. Platform driver makes it
easier for users to access sysfs attributes under (i.e.
/sys/devices/platform/huawei-wmi) compared to wmi driver.
Use WMI device UID, AMW0 has a UID of HWMI. WMI0 is the device name
and doesn't have a UID so keep it as it is.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/Kconfig | 7 +-
drivers/platform/x86/huawei-wmi.c | 226 ++++++++++++++++++++----------
2 files changed, 156 insertions(+), 77 deletions(-)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index ae21d08c65e8..754405e19ef1 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1305,7 +1305,7 @@ config INTEL_ATOMISP2_PM
will be called intel_atomisp2_pm.
config HUAWEI_WMI
- tristate "Huawei WMI hotkeys driver"
+ tristate "Huawei WMI laptop extras driver"
depends on ACPI_WMI
depends on INPUT
select INPUT_SPARSEKMAP
@@ -1314,9 +1314,8 @@ config HUAWEI_WMI
select LEDS_TRIGGER_AUDIO
select NEW_LEDS
help
- This driver provides support for Huawei WMI hotkeys.
- It enables the missing keys and adds support to the micmute
- LED found on some of these laptops.
+ This driver provides support for Huawei WMI hotkeys, battery charge
+ control, fn-lock, mic-mute LED, and other extra features.
To compile this driver as a module, choose M here: the module
will be called huawei-wmi.
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index 195a7f3638cb..9496ea3c78b5 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Huawei WMI hotkeys
+ * Huawei WMI laptop extras driver
*
* Copyright (C) 2018 Ayman Bagabas <ayman.bagabas@gmail.com>
*/
@@ -10,23 +10,28 @@
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/wmi.h>
/*
* Huawei WMI GUIDs
*/
-#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100"
-#define AMW0_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000"
+#define HWMI_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000"
+/* Legacy GUIDs */
#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100"
+#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100"
-struct huawei_wmi_priv {
- struct input_dev *idev;
+struct huawei_wmi {
+ struct input_dev *idev[2];
struct led_classdev cdev;
+ struct platform_device *pdev;
acpi_handle handle;
char *acpi_method;
};
+struct huawei_wmi *huawei_wmi;
+
static const struct key_entry huawei_wmi_keymap[] = {
{ KE_KEY, 0x281, { KEY_BRIGHTNESSDOWN } },
{ KE_KEY, 0x282, { KEY_BRIGHTNESSUP } },
@@ -37,7 +42,7 @@ static const struct key_entry huawei_wmi_keymap[] = {
{ KE_KEY, 0x289, { KEY_WLAN } },
// Huawei |M| key
{ KE_KEY, 0x28a, { KEY_CONFIG } },
- // Keyboard backlight
+ // Keyboard backlit
{ KE_IGNORE, 0x293, { KEY_KBDILLUMTOGGLE } },
{ KE_IGNORE, 0x294, { KEY_KBDILLUMUP } },
{ KE_IGNORE, 0x295, { KEY_KBDILLUMUP } },
@@ -47,7 +52,7 @@ static const struct key_entry huawei_wmi_keymap[] = {
static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
- struct huawei_wmi_priv *priv = dev_get_drvdata(led_cdev->dev->parent);
+ struct huawei_wmi *huawei = dev_get_drvdata(led_cdev->dev->parent);
acpi_status status;
union acpi_object args[3];
struct acpi_object_list arg_list = {
@@ -58,52 +63,53 @@ static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev,
args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER;
args[1].integer.value = 0x04;
- if (strcmp(priv->acpi_method, "SPIN") == 0) {
+ if (strcmp(huawei->acpi_method, "SPIN") == 0) {
args[0].integer.value = 0;
args[2].integer.value = brightness ? 1 : 0;
- } else if (strcmp(priv->acpi_method, "WPIN") == 0) {
+ } else if (strcmp(huawei->acpi_method, "WPIN") == 0) {
args[0].integer.value = 1;
args[2].integer.value = brightness ? 0 : 1;
} else {
return -EINVAL;
}
- status = acpi_evaluate_object(priv->handle, priv->acpi_method, &arg_list, NULL);
+ status = acpi_evaluate_object(huawei->handle, huawei->acpi_method, &arg_list, NULL);
if (ACPI_FAILURE(status))
return -ENXIO;
return 0;
}
-static int huawei_wmi_leds_setup(struct wmi_device *wdev)
+static void huawei_wmi_leds_setup(struct device *dev)
{
- struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
- priv->handle = ec_get_handle();
- if (!priv->handle)
- return 0;
+ huawei->handle = ec_get_handle();
+ if (!huawei->handle)
+ return;
- if (acpi_has_method(priv->handle, "SPIN"))
- priv->acpi_method = "SPIN";
- else if (acpi_has_method(priv->handle, "WPIN"))
- priv->acpi_method = "WPIN";
+ if (acpi_has_method(huawei->handle, "SPIN"))
+ huawei->acpi_method = "SPIN";
+ else if (acpi_has_method(huawei->handle, "WPIN"))
+ huawei->acpi_method = "WPIN";
else
- return 0;
+ return;
- priv->cdev.name = "platform::micmute";
- priv->cdev.max_brightness = 1;
- priv->cdev.brightness_set_blocking = huawei_wmi_micmute_led_set;
- priv->cdev.default_trigger = "audio-micmute";
- priv->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
- priv->cdev.dev = &wdev->dev;
- priv->cdev.flags = LED_CORE_SUSPENDRESUME;
+ huawei->cdev.name = "platform::micmute";
+ huawei->cdev.max_brightness = 1;
+ huawei->cdev.brightness_set_blocking = &huawei_wmi_micmute_led_set;
+ huawei->cdev.default_trigger = "audio-micmute";
+ huawei->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
+ huawei->cdev.dev = dev;
+ huawei->cdev.flags = LED_CORE_SUSPENDRESUME;
- return devm_led_classdev_register(&wdev->dev, &priv->cdev);
+ devm_led_classdev_register(dev, &huawei->cdev);
}
-static void huawei_wmi_process_key(struct wmi_device *wdev, int code)
+/* Input */
+
+static void huawei_wmi_process_key(struct input_dev *idev, int code)
{
- struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
const struct key_entry *key;
/*
@@ -127,81 +133,155 @@ static void huawei_wmi_process_key(struct wmi_device *wdev, int code)
kfree(response.pointer);
}
- key = sparse_keymap_entry_from_scancode(priv->idev, code);
+ key = sparse_keymap_entry_from_scancode(idev, code);
if (!key) {
- dev_info(&wdev->dev, "Unknown key pressed, code: 0x%04x\n", code);
+ dev_info(&idev->dev, "Unknown key pressed, code: 0x%04x\n", code);
return;
}
- sparse_keymap_report_entry(priv->idev, key, 1, true);
+ sparse_keymap_report_entry(idev, key, 1, true);
}
-static void huawei_wmi_notify(struct wmi_device *wdev,
- union acpi_object *obj)
+static void huawei_wmi_input_notify(u32 value, void *context)
{
- if (obj->type == ACPI_TYPE_INTEGER)
- huawei_wmi_process_key(wdev, obj->integer.value);
+ struct input_dev *idev = (struct input_dev *)context;
+ struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ acpi_status status;
+
+ status = wmi_get_event_data(value, &response);
+ if (ACPI_FAILURE(status)) {
+ dev_err(&idev->dev, "Unable to get event data\n");
+ return;
+ }
+
+ obj = (union acpi_object *)response.pointer;
+ if (obj && obj->type == ACPI_TYPE_INTEGER)
+ huawei_wmi_process_key(idev, obj->integer.value);
else
- dev_info(&wdev->dev, "Bad response type %d\n", obj->type);
+ dev_err(&idev->dev, "Bad response type\n");
+
+ kfree(response.pointer);
}
-static int huawei_wmi_input_setup(struct wmi_device *wdev)
+static int huawei_wmi_input_setup(struct device *dev,
+ const char *guid,
+ struct input_dev **idev)
{
- struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
- int err;
-
- priv->idev = devm_input_allocate_device(&wdev->dev);
- if (!priv->idev)
+ *idev = devm_input_allocate_device(dev);
+ if (!*idev)
return -ENOMEM;
- priv->idev->name = "Huawei WMI hotkeys";
- priv->idev->phys = "wmi/input0";
- priv->idev->id.bustype = BUS_HOST;
- priv->idev->dev.parent = &wdev->dev;
+ (*idev)->name = "Huawei WMI hotkeys";
+ (*idev)->phys = "wmi/input0";
+ (*idev)->id.bustype = BUS_HOST;
+ (*idev)->dev.parent = dev;
- err = sparse_keymap_setup(priv->idev, huawei_wmi_keymap, NULL);
- if (err)
- return err;
+ return sparse_keymap_setup(*idev, huawei_wmi_keymap, NULL) ||
+ input_register_device(*idev) ||
+ wmi_install_notify_handler(guid, huawei_wmi_input_notify,
+ *idev);
+}
- return input_register_device(priv->idev);
+static void huawei_wmi_input_exit(struct device *dev, const char *guid)
+{
+ wmi_remove_notify_handler(guid);
}
-static int huawei_wmi_probe(struct wmi_device *wdev, const void *context)
+/* Huawei driver */
+
+static const struct wmi_device_id huawei_wmi_events_id_table[] = {
+ { .guid_string = WMI0_EVENT_GUID },
+ { }
+};
+
+static int huawei_wmi_probe(struct platform_device *pdev)
{
- struct huawei_wmi_priv *priv;
+ const struct wmi_device_id *guid = huawei_wmi_events_id_table;
int err;
- priv = devm_kzalloc(&wdev->dev, sizeof(struct huawei_wmi_priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+ platform_set_drvdata(pdev, huawei_wmi);
+ huawei_wmi->pdev = pdev;
- dev_set_drvdata(&wdev->dev, priv);
+ while (*guid->guid_string) {
+ struct input_dev *idev = *huawei_wmi->idev;
- err = huawei_wmi_input_setup(wdev);
- if (err)
- return err;
+ if (wmi_has_guid(guid->guid_string)) {
+ err = huawei_wmi_input_setup(&pdev->dev, guid->guid_string, &idev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to setup input on %s\n", guid->guid_string);
+ return err;
+ }
+ }
- return huawei_wmi_leds_setup(wdev);
+ idev++;
+ guid++;
+ }
+
+ huawei_wmi_leds_setup(&pdev->dev);
+ return 0;
}
-static const struct wmi_device_id huawei_wmi_id_table[] = {
- { .guid_string = WMI0_EVENT_GUID },
- { .guid_string = AMW0_EVENT_GUID },
- { }
-};
+static int huawei_wmi_remove(struct platform_device *pdev)
+{
+ const struct wmi_device_id *guid = huawei_wmi_events_id_table;
+
+ while (*guid->guid_string) {
+ if (wmi_has_guid(guid->guid_string))
+ huawei_wmi_input_exit(&pdev->dev, guid->guid_string);
+
+ guid++;
+ }
-static struct wmi_driver huawei_wmi_driver = {
+ return 0;
+}
+
+static struct platform_driver huawei_wmi_driver = {
.driver = {
.name = "huawei-wmi",
},
- .id_table = huawei_wmi_id_table,
.probe = huawei_wmi_probe,
- .notify = huawei_wmi_notify,
+ .remove = huawei_wmi_remove,
};
-module_wmi_driver(huawei_wmi_driver);
+static __init int huawei_wmi_init(void)
+{
+ struct platform_device *pdev;
+ int err;
+
+ huawei_wmi = kzalloc(sizeof(struct huawei_wmi), GFP_KERNEL);
+ if (!huawei_wmi)
+ return -ENOMEM;
+
+ err = platform_driver_register(&huawei_wmi_driver);
+ if (err)
+ goto pdrv_err;
+
+ pdev = platform_device_register_simple("huawei-wmi", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ err = PTR_ERR(pdev);
+ goto pdev_err;
+ }
+
+ return 0;
+
+pdev_err:
+ platform_driver_unregister(&huawei_wmi_driver);
+pdrv_err:
+ kfree(huawei_wmi);
+ return err;
+}
+
+static __exit void huawei_wmi_exit(void)
+{
+ platform_device_unregister(huawei_wmi->pdev);
+ platform_driver_unregister(&huawei_wmi_driver);
+}
+
+module_init(huawei_wmi_init);
+module_exit(huawei_wmi_exit);
-MODULE_DEVICE_TABLE(wmi, huawei_wmi_id_table);
+MODULE_DEVICE_TABLE(wmi, huawei_wmi_events_id_table);
MODULE_AUTHOR("Ayman Bagabas <ayman.bagabas@gmail.com>");
-MODULE_DESCRIPTION("Huawei WMI hotkeys");
+MODULE_DESCRIPTION("Huawei WMI laptop extras driver");
MODULE_LICENSE("GPL v2");
base-commit: b5b3bd898ba99fb0fb6aed3b23ec6353a1724d6f
--
2.21.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 2/6] platform/x86: huawei-wmi: Add quirks and module parameters
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 1/6] platform/x86: huawei-wmi: Move to platform driver Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 3/6] platform/x86: huawei-wmi: Implement huawei wmi management Ayman Bagabas
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Mauro Carvalho Chehab,
Rafael J. Wysocki, Sinan Kaya, Takashi Iwai, Ayman Bagabas,
Stuart Hayes, Matan Ziv-Av, Hans de Goede, Peng Hao,
Krzysztof Kozlowski, Mattias Jacobsson, platform-driver-x86,
linux-kernel
Introduce quirks and module parameters. 3 quirks are added:
1. Fixes reporting brightness keys twice since it's already handled by
acpi-video.
2. Some models need a short delay when setting battery thresholds to
prevent a race condition when two processes read/write. (will be used later)
3. Matebook X (2017) handles micmute led through the "legacy" interface
which is not currently implemented. Use ACPI EC method to control
this led. (will be used later)
2 module parameters are added to enable this short delay and/or report
brightness keys through this driver.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/huawei-wmi.c | 73 +++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index 9496ea3c78b5..0e919bf56ad1 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -6,6 +6,7 @@
*/
#include <linux/acpi.h>
+#include <linux/dmi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
@@ -22,6 +23,14 @@
#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100"
#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100"
+struct quirk_entry {
+ bool battery_reset;
+ bool ec_micmute;
+ bool report_brightness;
+};
+
+static struct quirk_entry *quirks;
+
struct huawei_wmi {
struct input_dev *idev[2];
struct led_classdev cdev;
@@ -49,6 +58,58 @@ static const struct key_entry huawei_wmi_keymap[] = {
{ KE_END, 0 }
};
+static int battery_reset = -1;
+static int report_brightness = -1;
+
+module_param(battery_reset, bint, 0444);
+MODULE_PARM_DESC(battery_reset,
+ "Reset battery charge values to (0-0) before disabling it using (0-100)");
+module_param(report_brightness, bint, 0444);
+MODULE_PARM_DESC(report_brightness,
+ "Report brightness keys.");
+
+/* Quirks */
+
+static int __init dmi_matched(const struct dmi_system_id *dmi)
+{
+ quirks = dmi->driver_data;
+ return 1;
+}
+
+static struct quirk_entry quirk_unknown = {
+};
+
+static struct quirk_entry quirk_battery_reset = {
+ .battery_reset = true,
+};
+
+static struct quirk_entry quirk_matebook_x = {
+ .ec_micmute = true,
+ .report_brightness = true,
+};
+
+static const struct dmi_system_id huawei_quirks[] = {
+ {
+ .callback = dmi_matched,
+ .ident = "Huawei MACH-WX9",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MACH-WX9"),
+ },
+ .driver_data = &quirk_battery_reset
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Huawei MateBook X",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HUAWEI MateBook X")
+ },
+ .driver_data = &quirk_matebook_x
+ },
+ { }
+};
+
static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
@@ -139,6 +200,11 @@ static void huawei_wmi_process_key(struct input_dev *idev, int code)
return;
}
+ if (quirks && !quirks->report_brightness &&
+ (key->sw.code == KEY_BRIGHTNESSDOWN ||
+ key->sw.code == KEY_BRIGHTNESSUP))
+ return;
+
sparse_keymap_report_entry(idev, key, 1, true);
}
@@ -253,6 +319,13 @@ static __init int huawei_wmi_init(void)
if (!huawei_wmi)
return -ENOMEM;
+ quirks = &quirk_unknown;
+ dmi_check_system(huawei_quirks);
+ if (battery_reset != -1)
+ quirks->battery_reset = battery_reset;
+ if (report_brightness != -1)
+ quirks->report_brightness = report_brightness;
+
err = platform_driver_register(&huawei_wmi_driver);
if (err)
goto pdrv_err;
--
2.21.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 3/6] platform/x86: huawei-wmi: Implement huawei wmi management
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 1/6] platform/x86: huawei-wmi: Move to platform driver Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 2/6] platform/x86: huawei-wmi: Add quirks and module parameters Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 4/6] platform/x86: huawei-wmi: Add battery charging thresholds Ayman Bagabas
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Rafael J. Wysocki,
Mauro Carvalho Chehab, Sinan Kaya, Takashi Iwai, Ayman Bagabas,
Stuart Hayes, Matan Ziv-Av, Hans de Goede, Peng Hao,
Krzysztof Kozlowski, Mattias Jacobsson, platform-driver-x86,
linux-kernel
Huawei Matebook laptops come with a WMI management interface that can
control various aspects of the device. This interface is also found on
the old Matebook X released in 2017.
Use that to control the mic mute LED.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/huawei-wmi.c | 217 +++++++++++++++++++++++++-----
1 file changed, 180 insertions(+), 37 deletions(-)
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index 0e919bf56ad1..41904b1cc284 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -11,18 +11,35 @@
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/wmi.h>
/*
* Huawei WMI GUIDs
*/
+#define HWMI_METHOD_GUID "ABBC0F5B-8EA1-11D1-A000-C90629100000"
#define HWMI_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000"
/* Legacy GUIDs */
#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100"
#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100"
+/* HWMI commands */
+
+enum {
+ BATTERY_THRESH_GET = 0x00001103, /* \GBTT */
+ BATTERY_THRESH_SET = 0x00001003, /* \SBTT */
+ FN_LOCK_GET = 0x00000604, /* \GFRS */
+ FN_LOCK_SET = 0x00000704, /* \SFRS */
+ MICMUTE_LED_SET = 0x00000b04, /* \SMLS */
+};
+
+union hwmi_arg {
+ u64 cmd;
+ u8 args[8];
+};
+
struct quirk_entry {
bool battery_reset;
bool ec_micmute;
@@ -35,8 +52,8 @@ struct huawei_wmi {
struct input_dev *idev[2];
struct led_classdev cdev;
struct platform_device *pdev;
- acpi_handle handle;
- char *acpi_method;
+
+ struct mutex wmi_lock;
};
struct huawei_wmi *huawei_wmi;
@@ -110,52 +127,168 @@ static const struct dmi_system_id huawei_quirks[] = {
{ }
};
+/* Utils */
+
+static int huawei_wmi_call(struct acpi_buffer *in, struct acpi_buffer *out)
+{
+ acpi_status status;
+
+ mutex_lock(&huawei_wmi->wmi_lock);
+ status = wmi_evaluate_method(HWMI_METHOD_GUID, 0, 1, in, out);
+ mutex_unlock(&huawei_wmi->wmi_lock);
+ if (ACPI_FAILURE(status)) {
+ dev_err(&huawei_wmi->pdev->dev, "Failed to evaluate wmi method\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/* HWMI takes a 64 bit input and returns either a package with 2 buffers, one of
+ * 4 bytes and the other of 256 bytes, or one buffer of size 0x104 (260) bytes.
+ * The first 4 bytes are ignored, we ignore the first 4 bytes buffer if we got a
+ * package, or skip the first 4 if a buffer of 0x104 is used. The first byte of
+ * the remaining 0x100 sized buffer has the return status of every call. In case
+ * the return status is non-zero, we return -ENODEV but still copy the returned
+ * buffer to the given buffer parameter (buf).
+ */
+static int huawei_wmi_cmd(u64 arg, u8 *buf, size_t buflen)
+{
+ struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer in;
+ union acpi_object *obj;
+ size_t len;
+ int err, i;
+
+ in.length = sizeof(arg);
+ in.pointer = &arg;
+
+ /* Some models require calling HWMI twice to execute a command. We evaluate
+ * HWMI and if we get a non-zero return status we evaluate it again.
+ */
+ for (i = 0; i < 2; i++) {
+ err = huawei_wmi_call(&in, &out);
+ if (err)
+ goto fail_cmd;
+
+ obj = out.pointer;
+ if (!obj) {
+ err = -EIO;
+ goto fail_cmd;
+ }
+
+ switch (obj->type) {
+ /* Models that implement both "legacy" and HWMI tend to return a 0x104
+ * sized buffer instead of a package of 0x4 and 0x100 buffers.
+ */
+ case ACPI_TYPE_BUFFER:
+ if (obj->buffer.length == 0x104) {
+ // Skip the first 4 bytes.
+ obj->buffer.pointer += 4;
+ len = 0x100;
+ } else {
+ dev_err(&huawei_wmi->pdev->dev, "Bad buffer length, got %d\n", obj->buffer.length);
+ err = -EIO;
+ goto fail_cmd;
+ }
+
+ break;
+ /* HWMI returns a package with 2 buffer elements, one of 4 bytes and the
+ * other is 256 bytes.
+ */
+ case ACPI_TYPE_PACKAGE:
+ if (obj->package.count != 2) {
+ dev_err(&huawei_wmi->pdev->dev, "Bad package count, got %d\n", obj->package.count);
+ err = -EIO;
+ goto fail_cmd;
+ }
+
+ obj = &obj->package.elements[1];
+ if (obj->type != ACPI_TYPE_BUFFER) {
+ dev_err(&huawei_wmi->pdev->dev, "Bad package element type, got %d\n", obj->type);
+ err = -EIO;
+ goto fail_cmd;
+ }
+ len = obj->buffer.length;
+
+ break;
+ /* Shouldn't get here! */
+ default:
+ dev_err(&huawei_wmi->pdev->dev, "Unexpected obj type, got: %d\n", obj->type);
+ err = -EIO;
+ goto fail_cmd;
+ }
+
+ if (!*obj->buffer.pointer)
+ break;
+ }
+
+ err = (*obj->buffer.pointer) ? -ENODEV : 0;
+
+ if (buf) {
+ len = min(buflen, len);
+ memcpy(buf, obj->buffer.pointer, len);
+ }
+
+fail_cmd:
+ kfree(out.pointer);
+ return err;
+}
+
+/* LEDs */
+
static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
- struct huawei_wmi *huawei = dev_get_drvdata(led_cdev->dev->parent);
- acpi_status status;
- union acpi_object args[3];
- struct acpi_object_list arg_list = {
- .pointer = args,
- .count = ARRAY_SIZE(args),
- };
-
- args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER;
- args[1].integer.value = 0x04;
-
- if (strcmp(huawei->acpi_method, "SPIN") == 0) {
- args[0].integer.value = 0;
- args[2].integer.value = brightness ? 1 : 0;
- } else if (strcmp(huawei->acpi_method, "WPIN") == 0) {
- args[0].integer.value = 1;
- args[2].integer.value = brightness ? 0 : 1;
+ /* This is a workaround until the "legacy" interface is implemented. */
+ if (quirks && quirks->ec_micmute) {
+ char *acpi_method;
+ acpi_handle handle;
+ acpi_status status;
+ union acpi_object args[3];
+ struct acpi_object_list arg_list = {
+ .pointer = args,
+ .count = ARRAY_SIZE(args),
+ };
+
+ handle = ec_get_handle();
+ if (!handle)
+ return -ENODEV;
+
+ args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER;
+ args[1].integer.value = 0x04;
+
+ if (acpi_has_method(handle, "SPIN")) {
+ acpi_method = "SPIN";
+ args[0].integer.value = 0;
+ args[2].integer.value = brightness ? 1 : 0;
+ } else if (acpi_has_method(handle, "WPIN")) {
+ acpi_method = "WPIN";
+ args[0].integer.value = 1;
+ args[2].integer.value = brightness ? 0 : 1;
+ } else {
+ return -ENODEV;
+ }
+
+ status = acpi_evaluate_object(handle, acpi_method, &arg_list, NULL);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ return 0;
} else {
- return -EINVAL;
- }
+ union hwmi_arg arg;
- status = acpi_evaluate_object(huawei->handle, huawei->acpi_method, &arg_list, NULL);
- if (ACPI_FAILURE(status))
- return -ENXIO;
+ arg.cmd = MICMUTE_LED_SET;
+ arg.args[2] = brightness;
- return 0;
+ return huawei_wmi_cmd(arg.cmd, NULL, 0);
+ }
}
static void huawei_wmi_leds_setup(struct device *dev)
{
struct huawei_wmi *huawei = dev_get_drvdata(dev);
- huawei->handle = ec_get_handle();
- if (!huawei->handle)
- return;
-
- if (acpi_has_method(huawei->handle, "SPIN"))
- huawei->acpi_method = "SPIN";
- else if (acpi_has_method(huawei->handle, "WPIN"))
- huawei->acpi_method = "WPIN";
- else
- return;
-
huawei->cdev.name = "platform::micmute";
huawei->cdev.max_brightness = 1;
huawei->cdev.brightness_set_blocking = &huawei_wmi_micmute_led_set;
@@ -258,6 +391,7 @@ static void huawei_wmi_input_exit(struct device *dev, const char *guid)
static const struct wmi_device_id huawei_wmi_events_id_table[] = {
{ .guid_string = WMI0_EVENT_GUID },
+ { .guid_string = HWMI_EVENT_GUID },
{ }
};
@@ -284,7 +418,12 @@ static int huawei_wmi_probe(struct platform_device *pdev)
guid++;
}
- huawei_wmi_leds_setup(&pdev->dev);
+ if (wmi_has_guid(HWMI_METHOD_GUID)) {
+ mutex_init(&huawei_wmi->wmi_lock);
+
+ huawei_wmi_leds_setup(&pdev->dev);
+ }
+
return 0;
}
@@ -299,6 +438,9 @@ static int huawei_wmi_remove(struct platform_device *pdev)
guid++;
}
+ if (wmi_has_guid(HWMI_METHOD_GUID)) {
+ }
+
return 0;
}
@@ -354,6 +496,7 @@ static __exit void huawei_wmi_exit(void)
module_init(huawei_wmi_init);
module_exit(huawei_wmi_exit);
+MODULE_ALIAS("wmi:"HWMI_METHOD_GUID);
MODULE_DEVICE_TABLE(wmi, huawei_wmi_events_id_table);
MODULE_AUTHOR("Ayman Bagabas <ayman.bagabas@gmail.com>");
MODULE_DESCRIPTION("Huawei WMI laptop extras driver");
--
2.21.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 4/6] platform/x86: huawei-wmi: Add battery charging thresholds
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
` (2 preceding siblings ...)
2019-09-24 2:48 ` [PATCH v5 3/6] platform/x86: huawei-wmi: Implement huawei wmi management Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 5/6] platform/x86: huawei-wmi: Add fn-lock support Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 6/6] platform/x86: huawei-wmi: Add debugfs support Ayman Bagabas
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Mauro Carvalho Chehab, Sinan Kaya,
Rafael J. Wysocki, Takashi Iwai, Ayman Bagabas, Stuart Hayes,
Matan Ziv-Av, Enrico Weigelt, metux IT consult, Peng Hao,
Krzysztof Kozlowski, Mattias Jacobsson, platform-driver-x86,
linux-kernel
Control battery charge thresholds through the battery API and driver's
attributes.
Setting battery charging thresholds can introduce a race condition with
MACH-WX9 where two or more threads are trying to read/write values
from/to EC memory.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/huawei-wmi.c | 212 ++++++++++++++++++++++++++++++
2 files changed, 213 insertions(+)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 754405e19ef1..e64103789885 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1306,6 +1306,7 @@ config INTEL_ATOMISP2_PM
config HUAWEI_WMI
tristate "Huawei WMI laptop extras driver"
+ depends on ACPI_BATTERY
depends on ACPI_WMI
depends on INPUT
select INPUT_SPARSEKMAP
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index 41904b1cc284..6e791f9ffc26 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -6,6 +6,7 @@
*/
#include <linux/acpi.h>
+#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
@@ -13,7 +14,10 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/sysfs.h>
#include <linux/wmi.h>
+#include <acpi/battery.h>
/*
* Huawei WMI GUIDs
@@ -49,10 +53,13 @@ struct quirk_entry {
static struct quirk_entry *quirks;
struct huawei_wmi {
+ bool battery_available;
+
struct input_dev *idev[2];
struct led_classdev cdev;
struct platform_device *pdev;
+ struct mutex battery_lock;
struct mutex wmi_lock;
};
@@ -300,6 +307,208 @@ static void huawei_wmi_leds_setup(struct device *dev)
devm_led_classdev_register(dev, &huawei->cdev);
}
+/* Battery protection */
+
+static int huawei_wmi_battery_get(int *start, int *end)
+{
+ u8 ret[0x100];
+ int err, i;
+
+ err = huawei_wmi_cmd(BATTERY_THRESH_GET, ret, 0x100);
+ if (err)
+ return err;
+
+ /* Find the last two non-zero values. Return status is ignored. */
+ i = 0xff;
+ do {
+ if (start)
+ *start = ret[i-1];
+ if (end)
+ *end = ret[i];
+ } while (i > 2 && !ret[i--]);
+
+ return 0;
+}
+
+static int huawei_wmi_battery_set(int start, int end)
+{
+ union hwmi_arg arg;
+ int err;
+
+ if (start < 0 || end > 100)
+ return -EINVAL;
+
+ arg.cmd = BATTERY_THRESH_SET;
+ arg.args[2] = start;
+ arg.args[3] = end;
+
+ /* This is an edge case were some models turn battery protection
+ * off without changing their thresholds values. We clear the
+ * values before turning off protection. Sometimes we need a sleep delay to
+ * make sure these values make their way to EC memory.
+ */
+ if (quirks && quirks->battery_reset && start == 0 && end == 100) {
+ err = huawei_wmi_battery_set(0, 0);
+ if (err)
+ return err;
+
+ msleep(1000);
+ }
+
+ err = huawei_wmi_cmd(arg.cmd, NULL, 0);
+
+ return err;
+}
+
+static ssize_t charge_control_start_threshold_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int err, start;
+
+ err = huawei_wmi_battery_get(&start, NULL);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%d\n", start);
+}
+
+static ssize_t charge_control_end_threshold_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int err, end;
+
+ err = huawei_wmi_battery_get(NULL, &end);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%d\n", end);
+}
+
+static ssize_t charge_control_thresholds_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int err, start, end;
+
+ err = huawei_wmi_battery_get(&start, &end);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%d %d\n", start, end);
+}
+
+static ssize_t charge_control_start_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err, start, end;
+
+ err = huawei_wmi_battery_get(NULL, &end);
+ if (err)
+ return err;
+
+ if (sscanf(buf, "%d", &start) != 1)
+ return -EINVAL;
+
+ err = huawei_wmi_battery_set(start, end);
+ if (err)
+ return err;
+
+ return size;
+}
+
+static ssize_t charge_control_end_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err, start, end;
+
+ err = huawei_wmi_battery_get(&start, NULL);
+ if (err)
+ return err;
+
+ if (sscanf(buf, "%d", &end) != 1)
+ return -EINVAL;
+
+ err = huawei_wmi_battery_set(start, end);
+ if (err)
+ return err;
+
+ return size;
+}
+
+static ssize_t charge_control_thresholds_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err, start, end;
+
+ if (sscanf(buf, "%d %d", &start, &end) != 2)
+ return -EINVAL;
+
+ err = huawei_wmi_battery_set(start, end);
+ if (err)
+ return err;
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(charge_control_start_threshold);
+static DEVICE_ATTR_RW(charge_control_end_threshold);
+static DEVICE_ATTR_RW(charge_control_thresholds);
+
+static int huawei_wmi_battery_add(struct power_supply *battery)
+{
+ /* Huawei laptops come with one battery only */
+ if (strcmp(battery->desc->name, "BAT") != 1)
+ return -ENODEV;
+
+ device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold);
+ device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold);
+
+ return 0;
+}
+
+static int huawei_wmi_battery_remove(struct power_supply *battery)
+{
+ device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold);
+ device_remove_file(&battery->dev, &dev_attr_charge_control_end_threshold);
+
+ return 0;
+}
+
+static struct acpi_battery_hook huawei_wmi_battery_hook = {
+ .add_battery = huawei_wmi_battery_add,
+ .remove_battery = huawei_wmi_battery_remove,
+ .name = "Huawei Battery Extension"
+};
+
+static void huawei_wmi_battery_setup(struct device *dev)
+{
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
+
+ huawei->battery_available = true;
+ if (huawei_wmi_battery_get(NULL, NULL)) {
+ huawei->battery_available = false;
+ return;
+ }
+
+ battery_hook_register(&huawei_wmi_battery_hook);
+ device_create_file(dev, &dev_attr_charge_control_thresholds);
+}
+
+static void huawei_wmi_battery_exit(struct device *dev)
+{
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
+
+ if (huawei->battery_available) {
+ battery_hook_unregister(&huawei_wmi_battery_hook);
+ device_remove_file(dev, &dev_attr_charge_control_thresholds);
+ }
+}
+
/* Input */
static void huawei_wmi_process_key(struct input_dev *idev, int code)
@@ -420,8 +629,10 @@ static int huawei_wmi_probe(struct platform_device *pdev)
if (wmi_has_guid(HWMI_METHOD_GUID)) {
mutex_init(&huawei_wmi->wmi_lock);
+ mutex_init(&huawei_wmi->battery_lock);
huawei_wmi_leds_setup(&pdev->dev);
+ huawei_wmi_battery_setup(&pdev->dev);
}
return 0;
@@ -439,6 +650,7 @@ static int huawei_wmi_remove(struct platform_device *pdev)
}
if (wmi_has_guid(HWMI_METHOD_GUID)) {
+ huawei_wmi_battery_exit(&pdev->dev);
}
return 0;
--
2.21.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 5/6] platform/x86: huawei-wmi: Add fn-lock support
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
` (3 preceding siblings ...)
2019-09-24 2:48 ` [PATCH v5 4/6] platform/x86: huawei-wmi: Add battery charging thresholds Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
2019-09-24 2:48 ` [PATCH v5 6/6] platform/x86: huawei-wmi: Add debugfs support Ayman Bagabas
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Mauro Carvalho Chehab, Sinan Kaya,
Rafael J. Wysocki, Takashi Iwai, Ayman Bagabas, Stuart Hayes,
Matan Ziv-Av, Enrico Weigelt, metux IT consult, Peng Hao,
Krzysztof Kozlowski, Mattias Jacobsson, platform-driver-x86,
linux-kernel
Huawei Matebook laptops uses Fn key and toggle to access F1-F12 keys.
Along with that, there is this feature called fn-lock that inverts the
behavior of this Fn key and the F1-F12 row.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/huawei-wmi.c | 85 +++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index 6e791f9ffc26..d550c63fcba7 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -54,6 +54,7 @@ static struct quirk_entry *quirks;
struct huawei_wmi {
bool battery_available;
+ bool fn_lock_available;
struct input_dev *idev[2];
struct led_classdev cdev;
@@ -509,6 +510,88 @@ static void huawei_wmi_battery_exit(struct device *dev)
}
}
+/* Fn lock */
+
+static int huawei_wmi_fn_lock_get(int *on)
+{
+ u8 ret[0x100] = { 0 };
+ int err, i;
+
+ err = huawei_wmi_cmd(FN_LOCK_GET, ret, 0x100);
+ if (err)
+ return err;
+
+ /* Find the first non-zero value. Return status is ignored. */
+ i = 1;
+ do {
+ if (on)
+ *on = ret[i] - 1; // -1 undefined, 0 off, 1 on.
+ } while (i < 0xff && !ret[i++]);
+
+ return 0;
+}
+
+static int huawei_wmi_fn_lock_set(int on)
+{
+ union hwmi_arg arg;
+
+ arg.cmd = FN_LOCK_SET;
+ arg.args[2] = on + 1; // 0 undefined, 1 off, 2 on.
+
+ return huawei_wmi_cmd(arg.cmd, NULL, 0);
+}
+
+static ssize_t fn_lock_state_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int err, on;
+
+ err = huawei_wmi_fn_lock_get(&on);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%d\n", on);
+}
+
+static ssize_t fn_lock_state_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int on, err;
+
+ if (kstrtoint(buf, 10, &on) ||
+ on < 0 || on > 1)
+ return -EINVAL;
+
+ err = huawei_wmi_fn_lock_set(on);
+ if (err)
+ return err;
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(fn_lock_state);
+
+static void huawei_wmi_fn_lock_setup(struct device *dev)
+{
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
+
+ huawei->fn_lock_available = true;
+ if (huawei_wmi_fn_lock_get(NULL)) {
+ huawei->fn_lock_available = false;
+ return;
+ }
+
+ device_create_file(dev, &dev_attr_fn_lock_state);
+}
+
+static void huawei_wmi_fn_lock_exit(struct device *dev)
+{
+ if (huawei_wmi->fn_lock_available)
+ device_remove_file(dev, &dev_attr_fn_lock_state);
+}
+
/* Input */
static void huawei_wmi_process_key(struct input_dev *idev, int code)
@@ -632,6 +715,7 @@ static int huawei_wmi_probe(struct platform_device *pdev)
mutex_init(&huawei_wmi->battery_lock);
huawei_wmi_leds_setup(&pdev->dev);
+ huawei_wmi_fn_lock_setup(&pdev->dev);
huawei_wmi_battery_setup(&pdev->dev);
}
@@ -651,6 +735,7 @@ static int huawei_wmi_remove(struct platform_device *pdev)
if (wmi_has_guid(HWMI_METHOD_GUID)) {
huawei_wmi_battery_exit(&pdev->dev);
+ huawei_wmi_fn_lock_exit(&pdev->dev);
}
return 0;
--
2.21.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 6/6] platform/x86: huawei-wmi: Add debugfs support
2019-09-24 2:48 [PATCH v5 0/6] platform/x86: Huawei WMI laptop extras driver Ayman Bagabas
` (4 preceding siblings ...)
2019-09-24 2:48 ` [PATCH v5 5/6] platform/x86: huawei-wmi: Add fn-lock support Ayman Bagabas
@ 2019-09-24 2:48 ` Ayman Bagabas
5 siblings, 0 replies; 7+ messages in thread
From: Ayman Bagabas @ 2019-09-24 2:48 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko, Mauro Carvalho Chehab,
Rafael J. Wysocki, Sinan Kaya, Takashi Iwai, Ayman Bagabas,
Stuart Hayes, Matan Ziv-Av, Hans de Goede, Peng Hao,
Krzysztof Kozlowski, Mattias Jacobsson, platform-driver-x86,
linux-kernel
Add a debugfs interface that can be used to call the WMI management
interface function if available.
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/huawei-wmi.c | 97 +++++++++++++++++++++++++++++++
1 file changed, 97 insertions(+)
diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c
index d550c63fcba7..6720f78c60c2 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -6,6 +6,7 @@
*/
#include <linux/acpi.h>
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/input.h>
@@ -52,10 +53,16 @@ struct quirk_entry {
static struct quirk_entry *quirks;
+struct huawei_wmi_debug {
+ struct dentry *root;
+ u64 arg;
+};
+
struct huawei_wmi {
bool battery_available;
bool fn_lock_available;
+ struct huawei_wmi_debug debug;
struct input_dev *idev[2];
struct led_classdev cdev;
struct platform_device *pdev;
@@ -592,6 +599,94 @@ static void huawei_wmi_fn_lock_exit(struct device *dev)
device_remove_file(dev, &dev_attr_fn_lock_state);
}
+/* debugfs */
+
+static void huawei_wmi_debugfs_call_dump(struct seq_file *m, void *data,
+ union acpi_object *obj)
+{
+ struct huawei_wmi *huawei = m->private;
+ int i;
+
+ switch (obj->type) {
+ case ACPI_TYPE_INTEGER:
+ seq_printf(m, "0x%llx", obj->integer.value);
+ break;
+ case ACPI_TYPE_STRING:
+ seq_printf(m, "\"%*s\"", obj->string.length, obj->string.pointer);
+ break;
+ case ACPI_TYPE_BUFFER:
+ seq_puts(m, "{");
+ for (i = 0; i < obj->buffer.length; i++) {
+ seq_printf(m, "0x%02x", obj->buffer.pointer[i]);
+ if (i < obj->buffer.length - 1)
+ seq_puts(m, ",");
+ }
+ seq_puts(m, "}");
+ break;
+ case ACPI_TYPE_PACKAGE:
+ seq_puts(m, "[");
+ for (i = 0; i < obj->package.count; i++) {
+ huawei_wmi_debugfs_call_dump(m, huawei, &obj->package.elements[i]);
+ if (i < obj->package.count - 1)
+ seq_puts(m, ",");
+ }
+ seq_puts(m, "]");
+ break;
+ default:
+ dev_err(&huawei->pdev->dev, "Unexpected obj type, got %d\n", obj->type);
+ return;
+ }
+}
+
+static int huawei_wmi_debugfs_call_show(struct seq_file *m, void *data)
+{
+ struct huawei_wmi *huawei = m->private;
+ struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer in;
+ union acpi_object *obj;
+ int err;
+
+ in.length = sizeof(u64);
+ in.pointer = &huawei->debug.arg;
+
+ err = huawei_wmi_call(&in, &out);
+ if (err)
+ return err;
+
+ obj = out.pointer;
+ if (!obj) {
+ err = -EIO;
+ goto fail_debugfs_call;
+ }
+
+ huawei_wmi_debugfs_call_dump(m, huawei, obj);
+
+fail_debugfs_call:
+ kfree(out.pointer);
+ return err;
+}
+
+DEFINE_SHOW_ATTRIBUTE(huawei_wmi_debugfs_call);
+
+static void huawei_wmi_debugfs_setup(struct device *dev)
+{
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
+
+ huawei->debug.root = debugfs_create_dir("huawei-wmi", NULL);
+
+ debugfs_create_x64("arg", 0644, huawei->debug.root,
+ &huawei->debug.arg);
+ debugfs_create_file("call", 0400,
+ huawei->debug.root, huawei, &huawei_wmi_debugfs_call_fops);
+}
+
+static void huawei_wmi_debugfs_exit(struct device *dev)
+{
+ struct huawei_wmi *huawei = dev_get_drvdata(dev);
+
+ debugfs_remove_recursive(huawei->debug.root);
+}
+
/* Input */
static void huawei_wmi_process_key(struct input_dev *idev, int code)
@@ -717,6 +812,7 @@ static int huawei_wmi_probe(struct platform_device *pdev)
huawei_wmi_leds_setup(&pdev->dev);
huawei_wmi_fn_lock_setup(&pdev->dev);
huawei_wmi_battery_setup(&pdev->dev);
+ huawei_wmi_debugfs_setup(&pdev->dev);
}
return 0;
@@ -734,6 +830,7 @@ static int huawei_wmi_remove(struct platform_device *pdev)
}
if (wmi_has_guid(HWMI_METHOD_GUID)) {
+ huawei_wmi_debugfs_exit(&pdev->dev);
huawei_wmi_battery_exit(&pdev->dev);
huawei_wmi_fn_lock_exit(&pdev->dev);
}
--
2.21.0
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