sony_acpi: SNC device support for Sony Vaios
From: Bjorn Helgaas <bjorn.helgaas@hp.com> Even though the devices claimed by sony_acpi.c can not be hot-plugged, the driver registration infrastructure allows the .add() and .remove() methods to be called at any time while the driver is registered. So remove __init and __exit from them. From: Matthew Garrett <mjg59@srcf.ucam.org> [UBUNTU:acpi/sony] Add FN hotkey support Source URL of Patch: http://www.kernel.org/git/?p=linux/kernel/git/bcollins/ubuntu-dapper.git;a=commitdiff;h=7a9b49cba4919e8506604629db03add8e0b85767 Signed-off-by: Ben Collins <bcollins@ubuntu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Len Brown <len.brown@intel.com>
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Stelian Pop
Len Brown
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4 changed files with 499 additions and 0 deletions
87
Documentation/acpi/sony_acpi.txt
Normal file
87
Documentation/acpi/sony_acpi.txt
Normal file
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@ -0,0 +1,87 @@
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ACPI Sony Notebook Control Driver (SNC) Readme
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----------------------------------------------
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Copyright (C) 2004- 2005 Stelian Pop <stelian@popies.net>
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This mini-driver drives the ACPI SNC device present in the
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ACPI BIOS of the Sony Vaio laptops.
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It gives access to some extra laptop functionalities. In
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its current form, this driver is mainly useful for controlling the
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screen brightness, but it may do more in the future.
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You should probably start by trying the sonypi driver, and try
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sony_acpi only if sonypi doesn't work for you.
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Usage:
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------
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Loading the sony_acpi module will create a /proc/acpi/sony/
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directory populated with a couple of files.
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You then read/write integer values from/to those files by using
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standard UNIX tools.
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The files are:
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brightness current screen brightness
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brightness_default screen brightness which will be set
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when the laptop will be rebooted
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cdpower power on/off the internal CD drive
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Note that some files may be missing if they are not supported
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by your particular laptop model.
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Example usage:
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# echo "1" > /proc/acpi/sony/brightness
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sets the lowest screen brightness,
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# echo "8" > /proc/acpi/sony/brightness
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sets the highest screen brightness,
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# cat /proc/acpi/sony/brightness
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retrieves the current screen brightness.
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Development:
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------------
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If you want to help with the development of this driver (and
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you are not afraid of any side effects doing strange things with
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your ACPI BIOS could have on your laptop), load the driver and
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pass the option 'debug=1'.
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REPEAT: DON'T DO THIS IF YOU DON'T LIKE RISKY BUSINESS.
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In your kernel logs you will find the list of all ACPI methods
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the SNC device has on your laptop. You can see the GBRT/SBRT methods
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used to get/set the brightness, but there are others.
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I HAVE NO IDEA WHAT THOSE METHODS DO.
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The sony_acpi driver creates, for some of those methods (the most
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current ones found on several Vaio models), an entry under
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/proc/acpi/sony/, just like the 'brightness' one. You can create
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other entries corresponding to your own laptop methods by further
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editing the source (see the 'sony_acpi_values' table, and add a new
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structure to this table with your get/set method names).
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Your mission, should you accept it, is to try finding out what
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those entries are for, by reading/writing random values from/to those
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files and find out what is the impact on your laptop.
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Should you find anything interesting, please report it back to me,
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I will not disavow all knowledge of your actions :)
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Bugs/Limitations:
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-----------------
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* This driver is not based on official documentation from Sony
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(because there is none), so there is no guarantee this driver
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will work at all, or do the right thing. Although this hasn't
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happened to me, this driver could do very bad things to your
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laptop, including permanent damage.
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* The sony_acpi and sonypi drivers do not interact at all. In the
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future, sonypi could use sony_acpi to do (part of) its business.
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* spicctrl, which is the userspace tool used to communicate with the
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sonypi driver (through /dev/sonypi) does not try to use the
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sony_acpi driver. In the future, spicctrl could try sonypi first,
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and if it isn't present, try sony_acpi instead.
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@ -252,6 +252,20 @@ config ACPI_TOSHIBA
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If you have a legacy free Toshiba laptop (such as the Libretto L1
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series), say Y.
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config ACPI_SONY
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tristate "Sony Laptop Extras"
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depends on X86 && ACPI
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default m
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---help---
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This mini-driver drives the ACPI SNC device present in the
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ACPI BIOS of the Sony Vaio laptops.
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It gives access to some extra laptop functionalities. In
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its current form, the only thing this driver does is letting
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the user set or query the screen brightness.
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Read <file:Documentation/acpi/sony_acpi.txt> for more information.
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config ACPI_CUSTOM_DSDT
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bool "Include Custom DSDT"
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depends on !STANDALONE
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@ -53,6 +53,7 @@ obj-$(CONFIG_ACPI_THERMAL) += thermal.o
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obj-$(CONFIG_ACPI_SYSTEM) += system.o event.o
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obj-$(CONFIG_ACPI_DEBUG) += debug.o
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obj-$(CONFIG_ACPI_NUMA) += numa.o
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obj-$(CONFIG_ACPI_SONY) += sony_acpi.o
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obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o
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obj-$(CONFIG_ACPI_IBM) += ibm_acpi.o
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obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
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397
drivers/acpi/sony_acpi.c
Normal file
397
drivers/acpi/sony_acpi.c
Normal file
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/*
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* ACPI Sony Notebook Control Driver (SNC)
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*
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* Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
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*
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* Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
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* which are copyrighted by their respective authors.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#include <asm/uaccess.h>
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#define ACPI_SNC_CLASS "sony"
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#define ACPI_SNC_HID "SNY5001"
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#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.2"
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#define LOG_PFX KERN_WARNING "sony_acpi: "
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MODULE_AUTHOR("Stelian Pop");
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MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
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"the development of this driver");
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static int sony_acpi_add (struct acpi_device *device);
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static int sony_acpi_remove (struct acpi_device *device, int type);
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static struct acpi_driver sony_acpi_driver = {
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.name = ACPI_SNC_DRIVER_NAME,
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.class = ACPI_SNC_CLASS,
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.ids = ACPI_SNC_HID,
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.ops = {
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.add = sony_acpi_add,
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.remove = sony_acpi_remove,
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},
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};
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static acpi_handle sony_acpi_handle;
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static struct proc_dir_entry *sony_acpi_dir;
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static struct sony_acpi_value {
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char *name; /* name of the entry */
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struct proc_dir_entry *proc; /* /proc entry */
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char *acpiget;/* name of the ACPI get function */
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char *acpiset;/* name of the ACPI get function */
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int min; /* minimum allowed value or -1 */
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int max; /* maximum allowed value or -1 */
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int debug; /* active only in debug mode ? */
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} sony_acpi_values[] = {
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{
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.name = "brightness",
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.acpiget = "GBRT",
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.acpiset = "SBRT",
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.min = 1,
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.max = 8,
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.debug = 0,
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},
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{
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.name = "brightness_default",
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.acpiget = "GPBR",
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.acpiset = "SPBR",
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.min = 1,
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.max = 8,
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.debug = 0,
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},
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{
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.name = "fnkey",
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.acpiget = "GHKE",
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.debug = 0,
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},
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{
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.name = "cdpower",
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.acpiget = "GCDP",
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.acpiset = "SCDP",
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.min = -1,
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.max = -1,
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.debug = 0,
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},
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{
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.name = "PID",
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.acpiget = "GPID",
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.debug = 1,
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},
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{
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.name = "CTR",
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.acpiget = "GCTR",
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.acpiset = "SCTR",
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.min = -1,
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.max = -1,
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.debug = 1,
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},
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{
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.name = "PCR",
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.acpiget = "GPCR",
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.acpiset = "SPCR",
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.min = -1,
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.max = -1,
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.debug = 1,
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},
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{
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.name = "CMI",
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.acpiget = "GCMI",
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.acpiset = "SCMI",
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.min = -1,
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.max = -1,
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.debug = 1,
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},
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{
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.name = NULL,
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}
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};
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static int acpi_callgetfunc(acpi_handle handle, char *name, int *result)
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{
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struct acpi_buffer output;
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union acpi_object out_obj;
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acpi_status status;
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output.length = sizeof(out_obj);
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output.pointer = &out_obj;
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status = acpi_evaluate_object(handle, name, NULL, &output);
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if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
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*result = out_obj.integer.value;
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return 0;
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}
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printk(LOG_PFX "acpi_callreadfunc failed\n");
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return -1;
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}
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static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
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int *result)
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{
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struct acpi_object_list params;
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union acpi_object in_obj;
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struct acpi_buffer output;
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union acpi_object out_obj;
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acpi_status status;
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = value;
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output.length = sizeof(out_obj);
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output.pointer = &out_obj;
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status = acpi_evaluate_object(handle, name, ¶ms, &output);
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if (status == AE_OK) {
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if (result != NULL) {
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if (out_obj.type != ACPI_TYPE_INTEGER) {
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printk(LOG_PFX "acpi_evaluate_object bad "
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"return type\n");
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return -1;
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}
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*result = out_obj.integer.value;
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}
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return 0;
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}
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printk(LOG_PFX "acpi_evaluate_object failed\n");
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return -1;
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}
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static int parse_buffer(const char __user *buffer, unsigned long count,
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int *val) {
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char s[32];
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int ret;
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if (count > 31)
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return -EINVAL;
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if (copy_from_user(s, buffer, count))
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return -EFAULT;
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s[count] = '\0';
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ret = simple_strtoul(s, NULL, 10);
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*val = ret;
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return 0;
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}
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static int sony_acpi_read(char* page, char** start, off_t off, int count,
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int* eof, void *data)
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{
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struct sony_acpi_value *item = data;
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int value;
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if (!item->acpiget)
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return -EIO;
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if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
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return -EIO;
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return sprintf(page, "%d\n", value);
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}
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static int sony_acpi_write(struct file *file, const char __user *buffer,
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unsigned long count, void *data)
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{
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struct sony_acpi_value *item = data;
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int result;
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int value;
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if (!item->acpiset)
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return -EIO;
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if ((result = parse_buffer(buffer, count, &value)) < 0)
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return result;
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if (item->min != -1 && value < item->min)
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return -EINVAL;
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if (item->max != -1 && value > item->max)
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return -EINVAL;
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if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
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return -EIO;
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return count;
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}
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static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
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{
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printk(LOG_PFX "sony_acpi_notify\n");
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}
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static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
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void *context, void **return_value)
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{
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struct acpi_namespace_node *node;
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union acpi_operand_object *operand;
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node = (struct acpi_namespace_node *) handle;
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operand = (union acpi_operand_object *) node->object;
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printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
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(u32) operand->method.param_count);
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return AE_OK;
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}
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static int sony_acpi_add(struct acpi_device *device)
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{
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acpi_status status;
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int result;
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struct sony_acpi_value *item;
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sony_acpi_handle = device->handle;
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acpi_driver_data(device) = NULL;
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acpi_device_dir(device) = sony_acpi_dir;
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if (debug) {
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status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
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1, sony_walk_callback, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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printk(LOG_PFX "unable to walk acpi resources\n");
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result = -ENODEV;
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goto outwalk;
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}
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status = acpi_install_notify_handler(sony_acpi_handle,
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ACPI_DEVICE_NOTIFY,
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sony_acpi_notify,
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NULL);
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if (ACPI_FAILURE(status)) {
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printk(LOG_PFX "unable to install notify handler\n");
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result = -ENODEV;
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goto outnotify;
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}
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}
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for (item = sony_acpi_values; item->name; ++item) {
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acpi_handle handle;
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if (!debug && item->debug)
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continue;
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if (item->acpiget &&
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ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
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item->acpiget, &handle)))
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continue;
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if (item->acpiset &&
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ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
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item->acpiset, &handle)))
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continue;
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item->proc = create_proc_entry(item->name, 0600,
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acpi_device_dir(device));
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if (!item->proc) {
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printk(LOG_PFX "unable to create proc entry\n");
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result = -EIO;
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goto outproc;
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}
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item->proc->read_proc = sony_acpi_read;
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item->proc->write_proc = sony_acpi_write;
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item->proc->data = item;
|
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item->proc->owner = THIS_MODULE;
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}
|
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|
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printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
|
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|
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return 0;
|
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|
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outproc:
|
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if (debug) {
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status = acpi_remove_notify_handler(sony_acpi_handle,
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ACPI_DEVICE_NOTIFY,
|
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sony_acpi_notify);
|
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if (ACPI_FAILURE(status))
|
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printk(LOG_PFX "unable to remove notify handler\n");
|
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}
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outnotify:
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for (item = sony_acpi_values; item->name; ++item)
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if (item->proc)
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remove_proc_entry(item->name, acpi_device_dir(device));
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outwalk:
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return result;
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}
|
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|
||||
static int sony_acpi_remove(struct acpi_device *device, int type)
|
||||
{
|
||||
acpi_status status;
|
||||
struct sony_acpi_value *item;
|
||||
|
||||
if (debug) {
|
||||
status = acpi_remove_notify_handler(sony_acpi_handle,
|
||||
ACPI_DEVICE_NOTIFY,
|
||||
sony_acpi_notify);
|
||||
if (ACPI_FAILURE(status))
|
||||
printk(LOG_PFX "unable to remove notify handler\n");
|
||||
}
|
||||
|
||||
for (item = sony_acpi_values; item->name; ++item)
|
||||
if (item->proc)
|
||||
remove_proc_entry(item->name, acpi_device_dir(device));
|
||||
|
||||
printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init sony_acpi_init(void)
|
||||
{
|
||||
int result;
|
||||
|
||||
sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
|
||||
if (!sony_acpi_dir) {
|
||||
printk(LOG_PFX "unable to create /proc entry\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
sony_acpi_dir->owner = THIS_MODULE;
|
||||
|
||||
result = acpi_bus_register_driver(&sony_acpi_driver);
|
||||
if (result < 0) {
|
||||
remove_proc_entry("sony", acpi_root_dir);
|
||||
return -ENODEV;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void __exit sony_acpi_exit(void)
|
||||
{
|
||||
acpi_bus_unregister_driver(&sony_acpi_driver);
|
||||
remove_proc_entry("sony", acpi_root_dir);
|
||||
}
|
||||
|
||||
module_init(sony_acpi_init);
|
||||
module_exit(sony_acpi_exit);
|
||||
Loading…
Reference in a new issue