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Date: Thu, 29 Jul 2010 11:56:59 +0200
From: Pierre Ducroquet <pinaraf@...araf.info>
To: platform-driver-x86@...r.kernel.org
Cc: mjg@...hat.com, akpm@...ux-foundation.org, len.brown@...el.com,
nm127@...email.hu, adobriyan@...il.com,
linux-kernel@...r.kernel.org,
Pierre Ducroquet <pinaraf@...araf.info>
Subject: [PATCH] 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: Pierre Ducroquet <pinaraf@...araf.info>
---
drivers/platform/x86/toshiba_acpi.c | 117 +++++++++++++++++++++++++++++++++++
1 files changed, 117 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 37aa147..81b76a8 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -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>
@@ -285,6 +287,7 @@ 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;
@@ -292,6 +295,110 @@ 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",
};
@@ -914,6 +1021,9 @@ 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;
@@ -1013,6 +1123,13 @@ 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;
}
--
1.7.1
--
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