Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756211Ab0G2J6H (ORCPT ); Thu, 29 Jul 2010 05:58:07 -0400 Received: from smtp5-g21.free.fr ([212.27.42.5]:43685 "EHLO smtp5-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756045Ab0G2J6F (ORCPT ); Thu, 29 Jul 2010 05:58:05 -0400 From: Pierre Ducroquet To: platform-driver-x86@vger.kernel.org Cc: mjg@redhat.com, akpm@linux-foundation.org, len.brown@intel.com, nm127@freemail.hu, adobriyan@gmail.com, linux-kernel@vger.kernel.org, Pierre Ducroquet 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. Date: Thu, 29 Jul 2010 11:56:59 +0200 Message-Id: <1280397419-6799-1-git-send-email-pinaraf@pinaraf.info> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4521 Lines: 176 Signed-off-by: Pierre Ducroquet --- 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 #include #include +#include #include #include @@ -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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/