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Commit 6c3f6e6c authored by Pierre Ducroquet's avatar Pierre Ducroquet Committed by Matthew Garrett
Browse files

toshiba-acpi: Add support for Toshiba Illumination. 



Add support for Toshiba Illumination. This is a set of LEDs installed on
some Toshiba laptops. It is controlled through ACPI, the commands has been
found through reverse engineering. It has been tested on a Toshiba Qosmio
G50-122.

Signed-off-by: default avatarPierre Ducroquet <pinaraf@pinaraf.info>
Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
parent 5ca56718

drivers/platform/x86/toshiba_acpi.c

+117 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 *

 *  Copyright (C) 2002-2004 John Belmonte

 *  Copyright (C) 2008 Philip Langdale

 *  Copyright (C) 2010 Pierre Ducroquet

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by
@@ -47,6 +48,7 @@ 
#include <linux/platform_device.h>

#include <linux/rfkill.h>

#include <linux/input.h>

#include <linux/leds.h>

#include <linux/slab.h>



#include <asm/uaccess.h>
@@ -287,6 +289,7 @@ struct toshiba_acpi_dev { 
	struct platform_device *p_dev;

	struct rfkill *bt_rfk;

	struct input_dev *hotkey_dev;

	int illumination_installed;

	acpi_handle handle;



	const char *bt_name;
@@ -294,6 +297,110 @@ struct toshiba_acpi_dev { 
	struct mutex mutex;

};



/* Illumination support */

static int toshiba_illumination_available(void)

{

	u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };

	u32 out[HCI_WORDS];

	acpi_status status;



	in[0] = 0xf100;

	status = hci_raw(in, out);

	if (ACPI_FAILURE(status)) {

		printk(MY_INFO "Illumination device not available\n");

		return 0;

	}

	in[0] = 0xf400;

	status = hci_raw(in, out);

	return 1;

}



static void toshiba_illumination_set(struct led_classdev *cdev,

				     enum led_brightness brightness)

{

	u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };

	u32 out[HCI_WORDS];

	acpi_status status;



	/* First request : initialize communication. */

	in[0] = 0xf100;

	status = hci_raw(in, out);

	if (ACPI_FAILURE(status)) {

		printk(MY_INFO "Illumination device not available\n");

		return;

	}



	if (brightness) {

		/* Switch the illumination on */

		in[0] = 0xf400;

		in[1] = 0x14e;

		in[2] = 1;

		status = hci_raw(in, out);

		if (ACPI_FAILURE(status)) {

			printk(MY_INFO "ACPI call for illumination failed.\n");

			return;

		}

	} else {

		/* Switch the illumination off */

		in[0] = 0xf400;

		in[1] = 0x14e;

		in[2] = 0;

		status = hci_raw(in, out);

		if (ACPI_FAILURE(status)) {

			printk(MY_INFO "ACPI call for illumination failed.\n");

			return;

		}

	}



	/* Last request : close communication. */

	in[0] = 0xf200;

	in[1] = 0;

	in[2] = 0;

	hci_raw(in, out);

}



static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)

{

	u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };

	u32 out[HCI_WORDS];

	acpi_status status;

	enum led_brightness result;



	/* First request : initialize communication. */

	in[0] = 0xf100;

	status = hci_raw(in, out);

	if (ACPI_FAILURE(status)) {

		printk(MY_INFO "Illumination device not available\n");

		return LED_OFF;

	}



	/* Check the illumination */

	in[0] = 0xf300;

	in[1] = 0x14e;

	status = hci_raw(in, out);

	if (ACPI_FAILURE(status)) {

		printk(MY_INFO "ACPI call for illumination failed.\n");

		return LED_OFF;

	}



	result = out[2] ? LED_FULL : LED_OFF;



	/* Last request : close communication. */

	in[0] = 0xf200;

	in[1] = 0;

	in[2] = 0;

	hci_raw(in, out);



	return result;

}



static struct led_classdev toshiba_led = {

	.name           = "toshiba::illumination",

	.max_brightness = 1,

	.brightness_set = toshiba_illumination_set,

	.brightness_get = toshiba_illumination_get,

};



static struct toshiba_acpi_dev toshiba_acpi = {

	.bt_name = "Toshiba Bluetooth",

};
@@ -913,6 +1020,9 @@ static void toshiba_acpi_exit(void) 
	acpi_remove_notify_handler(toshiba_acpi.handle, ACPI_DEVICE_NOTIFY,

				   toshiba_acpi_notify);



	if (toshiba_acpi.illumination_installed)

		led_classdev_unregister(&toshiba_led);



	platform_device_unregister(toshiba_acpi.p_dev);



	return;
@@ -1007,6 +1117,13 @@ static int __init toshiba_acpi_init(void) 
		}

	}



	toshiba_acpi.illumination_installed = 0;

	if (toshiba_illumination_available()) {

		if (!led_classdev_register(&(toshiba_acpi.p_dev->dev),

					   &toshiba_led))

			toshiba_acpi.illumination_installed = 1;

	}



	return 0;

}