thinkpad-acpi: Add mute and mic-mute LED functionality (420f9739) · Commits · 戴 / test

Documentation/laptops/thinkpad-acpi.txt

+5 −2

Original line number	Diff line number	Diff line
		ThinkPad ACPI Extras Driver

		Version 0.24
		December 11th, 2009
		Version 0.25
		October 16th, 2013

		Borislav Deianov <borislav@users.sf.net>
		Henrique de Moraes Holschuh <hmh@hmh.eng.br>
		@@ -741,6 +741,9 @@ compiled with the CONFIG_THINKPAD_ACPI_UNSAFE_LEDS option enabled.
		Distributions must never enable this option. Individual users that
		are aware of the consequences are welcome to enabling it.

		Audio mute and microphone mute LEDs are supported, but currently not
		visible to userspace. They are used by the snd-hda-intel audio driver.

		procfs notes:

		The available commands are:

drivers/platform/x86/thinkpad_acpi.c

+91 −1

Original line number	Diff line number	Diff line
		@@ -23,7 +23,7 @@

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#define TPACPI_VERSION "0.24"
		#define TPACPI_VERSION "0.25"
		#define TPACPI_SYSFS_VERSION 0x020700

		/*
		@@ -88,6 +88,7 @@

		#include <linux/pci_ids.h>

		#include <linux/thinkpad_acpi.h>

		/* ThinkPad CMOS commands */
		#define TP_CMOS_VOLUME_DOWN 0
		@@ -8350,6 +8351,91 @@ static struct ibm_struct fan_driver_data = {
		.resume = fan_resume,
		};

		/*************************************************************************
		* Mute LED subdriver
		*/


		struct tp_led_table {
		acpi_string name;
		int on_value;
		int off_value;
		int state;
		};

		static struct tp_led_table led_tables[] = {
		[TPACPI_LED_MUTE] = {
		.name = "SSMS",
		.on_value = 1,
		.off_value = 0,
		},
		[TPACPI_LED_MICMUTE] = {
		.name = "MMTS",
		.on_value = 2,
		.off_value = 0,
		},
		};

		static int mute_led_on_off(struct tp_led_table *t, bool state)
		{
		acpi_handle temp;
		int output;

		if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
		pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
		return -EIO;
		}

		if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
		state ? t->on_value : t->off_value))
		return -EIO;

		t->state = state;
		return state;
		}

		int tpacpi_led_set(int whichled, bool on)
		{
		struct tp_led_table *t;

		if (whichled < 0 \|\| whichled >= TPACPI_LED_MAX)
		return -EINVAL;

		t = &led_tables[whichled];
		if (t->state < 0 \|\| t->state == on)
		return t->state;
		return mute_led_on_off(t, on);
		}
		EXPORT_SYMBOL_GPL(tpacpi_led_set);

		static int mute_led_init(struct ibm_init_struct *iibm)
		{
		acpi_handle temp;
		int i;

		for (i = 0; i < TPACPI_LED_MAX; i++) {
		struct tp_led_table *t = &led_tables[i];
		if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
		mute_led_on_off(t, false);
		else
		t->state = -ENODEV;
		}
		return 0;
		}

		static void mute_led_exit(void)
		{
		int i;

		for (i = 0; i < TPACPI_LED_MAX; i++)
		tpacpi_led_set(i, false);
		}

		static struct ibm_struct mute_led_driver_data = {
		.name = "mute_led",
		.exit = mute_led_exit,
		};

		/****************************************************************************
		****************************************************************************
		*
		@@ -8768,6 +8854,10 @@ static struct ibm_init_struct ibms_init[] __initdata = {
		.init = fan_init,
		.data = &fan_driver_data,
		},
		{
		.init = mute_led_init,
		.data = &mute_led_driver_data,
		},
		};

		static int __init set_ibm_param(const char val, struct kernel_param kp)

include/linux/thinkpad_acpi.h

0 → 100644

+15 −0

Original line number	Diff line number	Diff line
		#ifndef __THINKPAD_ACPI_H__
		#define __THINKPAD_ACPI_H__

		/* These two functions return 0 if success, or negative error code
		(e g -ENODEV if no led present) */

		enum {
		TPACPI_LED_MUTE,
		TPACPI_LED_MICMUTE,
		TPACPI_LED_MAX,
		};

		int tpacpi_led_set(int whichled, bool on);

		#endif

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