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[PATCH] updated hdaps driver.
Driver for the IBM Hard Drive Active Protection System (HDAPS), an accelerometer found in most modern ThinkPads. Signed-off-by: Robert Love <rml@novell.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Robert Love
Greg Kroah-Hartman
parent
5dce225bd9
commit
860e1d6b46
4 changed files with 764 additions and 0 deletions
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@ -951,6 +951,13 @@ L: lm-sensors@lm-sensors.org
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W: http://www.lm-sensors.nu/
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W: http://www.lm-sensors.nu/
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S: Maintained
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S: Maintained
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HARD DRIVE ACTIVE PROTECTION SYSTEM (HDAPS) DRIVER
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P: Robert Love
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M: rlove@rlove.org
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M: linux-kernel@vger.kernel.org
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W: http://www.kernel.org/pub/linux/kernel/people/rml/hdaps/
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S: Maintained
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HARMONY SOUND DRIVER
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HARMONY SOUND DRIVER
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P: Kyle McMartin
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P: Kyle McMartin
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M: kyle@parisc-linux.org
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M: kyle@parisc-linux.org
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@ -411,6 +411,23 @@ config SENSORS_W83627EHF
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This driver can also be built as a module. If so, the module
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This driver can also be built as a module. If so, the module
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will be called w83627ehf.
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will be called w83627ehf.
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config SENSORS_HDAPS
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tristate "IBM Hard Drive Active Protection System (hdaps)"
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depends on HWMON && INPUT && X86
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default n
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help
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This driver provides support for the IBM Hard Drive Active Protection
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System (hdaps), which provides an accelerometer and other misc. data.
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Supported laptops include the IBM ThinkPad T41, T42, T43, and R51.
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The accelerometer data is readable via sysfs.
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This driver also provides an input class device, allowing the
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laptop to act as a pinball machine-esque mouse. This is off by
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default but enabled via sysfs or the module parameter "mousedev".
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Say Y here if you have an applicable laptop and want to experience
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the awesome power of hdaps.
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config HWMON_DEBUG_CHIP
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config HWMON_DEBUG_CHIP
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bool "Hardware Monitoring Chip debugging messages"
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bool "Hardware Monitoring Chip debugging messages"
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depends on HWMON
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depends on HWMON
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@ -22,6 +22,7 @@ obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
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obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
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obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
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obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
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obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
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obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
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obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
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obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
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obj-$(CONFIG_SENSORS_IT87) += it87.o
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obj-$(CONFIG_SENSORS_IT87) += it87.o
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obj-$(CONFIG_SENSORS_LM63) += lm63.o
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obj-$(CONFIG_SENSORS_LM63) += lm63.o
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obj-$(CONFIG_SENSORS_LM75) += lm75.o
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obj-$(CONFIG_SENSORS_LM75) += lm75.o
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739
drivers/hwmon/hdaps.c
Normal file
739
drivers/hwmon/hdaps.c
Normal file
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@ -0,0 +1,739 @@
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/*
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* drivers/hwmon/hdaps.c - driver for IBM's Hard Drive Active Protection System
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*
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* Copyright (C) 2005 Robert Love <rml@novell.com>
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* Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
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*
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* The HardDisk Active Protection System (hdaps) is present in the IBM ThinkPad
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* T41, T42, T43, R51, and X40, at least. It provides a basic two-axis
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* accelerometer and other data, such as the device's temperature.
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*
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* Based on the document by Mark A. Smith available at
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* http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html and a lot of trial
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* and error.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License v2 as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/dmi.h>
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#include <asm/io.h>
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#define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */
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#define HDAPS_NR_PORTS 0x30 /* 0x1600 - 0x162f */
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#define STATE_FRESH 0x50 /* accelerometer data is fresh */
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#define REFRESH_ASYNC 0x00 /* do asynchronous refresh */
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#define REFRESH_SYNC 0x01 /* do synchronous refresh */
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#define HDAPS_PORT_STATE 0x1611 /* device state */
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#define HDAPS_PORT_YPOS 0x1612 /* y-axis position */
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#define HDAPS_PORT_XPOS 0x1614 /* x-axis position */
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#define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in celcius */
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#define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */
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#define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */
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#define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */
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#define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */
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#define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */
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#define HDAPS_READ_MASK 0xff /* some reads have the low 8 bits set */
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#define KEYBD_MASK 0x20 /* set if keyboard activity */
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#define MOUSE_MASK 0x40 /* set if mouse activity */
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#define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */
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#define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */
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#define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */
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#define INIT_WAIT_MSECS 200 /* ... in 200ms increments */
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static struct platform_device *pdev;
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static struct input_dev hdaps_idev;
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static struct timer_list hdaps_timer;
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static unsigned int hdaps_mousedev_threshold = 4;
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static unsigned long hdaps_poll_ms = 50;
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static unsigned int hdaps_mousedev;
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static unsigned int hdaps_invert;
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static u8 km_activity;
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static int rest_x;
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static int rest_y;
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static DECLARE_MUTEX(hdaps_sem);
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/*
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* __get_latch - Get the value from a given port. Callers must hold hdaps_sem.
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*/
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static inline u8 __get_latch(u16 port)
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{
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return inb(port) & HDAPS_READ_MASK;
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}
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/*
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* __check_latch - Check a port latch for a given value. Callers must hold
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* hdaps_sem. Returns zero if the port contains the given value.
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*/
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static inline unsigned int __check_latch(u16 port, u8 val)
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{
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if (__get_latch(port) == val)
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return 0;
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return -EINVAL;
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}
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/*
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* __wait_latch - Wait up to 100us for a port latch to get a certain value,
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* returning zero if the value is obtained. Callers must hold hdaps_sem.
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*/
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static unsigned int __wait_latch(u16 port, u8 val)
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{
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unsigned int i;
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for (i = 0; i < 20; i++) {
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if (!__check_latch(port, val))
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return 0;
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udelay(5);
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}
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return -EINVAL;
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}
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/*
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* __device_refresh - Request a refresh from the accelerometer.
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*
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* If sync is REFRESH_SYNC, we perform a synchronous refresh and will wait.
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* Returns zero if successful and nonzero on error.
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*
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* If sync is REFRESH_ASYNC, we merely kick off a new refresh if the device is
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* not up-to-date. Always returns zero.
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*
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* Callers must hold hdaps_sem.
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*/
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static int __device_refresh(unsigned int sync)
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{
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u8 state;
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udelay(100);
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state = inb(0x1604);
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if (state == STATE_FRESH)
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return 0;
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outb(0x11, 0x1610);
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outb(0x01, 0x161f);
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if (sync == REFRESH_ASYNC)
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return 0;
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return __wait_latch(0x1604, STATE_FRESH);
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}
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/*
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* __device_complete - Indicate to the accelerometer that we are done reading
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* data, and then initiate an async refresh. Callers must hold hdaps_sem.
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*/
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static inline void __device_complete(void)
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{
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inb(0x161f);
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inb(0x1604);
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__device_refresh(REFRESH_ASYNC);
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}
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static int __hdaps_readb_one(unsigned int port, u8 *val)
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{
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/* do a sync refresh -- we need to be sure that we read fresh data */
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if (__device_refresh(REFRESH_SYNC))
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return -EIO;
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*val = inb(port);
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__device_complete();
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return 0;
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}
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/*
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* hdaps_readb_one - reads a byte from a single I/O port, placing the value in
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* the given pointer. Returns zero on success or a negative error on failure.
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* Can sleep.
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*/
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static int hdaps_readb_one(unsigned int port, u8 *val)
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{
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int ret;
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down(&hdaps_sem);
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ret = __hdaps_readb_one(port, val);
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up(&hdaps_sem);
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return ret;
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}
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static int __hdaps_read_pair(unsigned int port1, unsigned int port2,
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int *x, int *y)
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{
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/* do a sync refresh -- we need to be sure that we read fresh data */
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if (__device_refresh(REFRESH_SYNC))
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return -EIO;
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*y = inw(port2);
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*x = inw(port1);
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km_activity = inb(HDAPS_PORT_KMACT);
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__device_complete();
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/* if hdaps_invert is set, negate the two values */
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if (hdaps_invert) {
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*x = -*x;
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*y = -*y;
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}
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return 0;
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}
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/*
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* hdaps_read_pair - reads the values from a pair of ports, placing the values
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* in the given pointers. Returns zero on success. Can sleep.
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*/
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static int hdaps_read_pair(unsigned int port1, unsigned int port2,
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int *val1, int *val2)
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{
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int ret;
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down(&hdaps_sem);
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ret = __hdaps_read_pair(port1, port2, val1, val2);
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up(&hdaps_sem);
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return ret;
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}
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/* initialize the accelerometer */
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static int hdaps_device_init(void)
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{
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unsigned int total_msecs = INIT_TIMEOUT_MSECS;
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int ret = -ENXIO;
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down(&hdaps_sem);
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outb(0x13, 0x1610);
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outb(0x01, 0x161f);
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if (__wait_latch(0x161f, 0x00))
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goto out;
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/*
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* The 0x03 value appears to only work on some thinkpads, such as the
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* T42p. Others return 0x01.
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*
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* The 0x02 value occurs when the chip has been previously initialized.
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*/
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if (__check_latch(0x1611, 0x03) &&
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__check_latch(0x1611, 0x02) &&
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__check_latch(0x1611, 0x01))
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goto out;
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printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n",
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__get_latch(0x1611));
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outb(0x17, 0x1610);
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outb(0x81, 0x1611);
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outb(0x01, 0x161f);
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if (__wait_latch(0x161f, 0x00))
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goto out;
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if (__wait_latch(0x1611, 0x00))
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goto out;
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if (__wait_latch(0x1612, 0x60))
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goto out;
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if (__wait_latch(0x1613, 0x00))
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goto out;
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outb(0x14, 0x1610);
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outb(0x01, 0x1611);
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outb(0x01, 0x161f);
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if (__wait_latch(0x161f, 0x00))
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goto out;
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outb(0x10, 0x1610);
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outb(0xc8, 0x1611);
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outb(0x00, 0x1612);
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outb(0x02, 0x1613);
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outb(0x01, 0x161f);
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if (__wait_latch(0x161f, 0x00))
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goto out;
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if (__device_refresh(REFRESH_SYNC))
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goto out;
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if (__wait_latch(0x1611, 0x00))
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goto out;
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/* we have done our dance, now let's wait for the applause */
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while (total_msecs > 0) {
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u8 ignored;
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/* a read of the device helps push it into action */
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__hdaps_readb_one(HDAPS_PORT_UNKNOWN, &ignored);
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if (!__wait_latch(0x1611, 0x02)) {
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ret = 0;
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break;
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}
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msleep(INIT_WAIT_MSECS);
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total_msecs -= INIT_WAIT_MSECS;
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}
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out:
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up(&hdaps_sem);
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return ret;
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}
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/* Input class stuff */
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/*
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* hdaps_calibrate - Zero out our "resting" values. Callers must hold hdaps_sem.
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*/
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static void hdaps_calibrate(void)
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{
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int x, y;
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if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
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return;
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rest_x = x;
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rest_y = y;
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}
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static void hdaps_mousedev_poll(unsigned long unused)
|
||||||
|
{
|
||||||
|
int x, y;
|
||||||
|
|
||||||
|
/* Cannot sleep. Try nonblockingly. If we fail, try again later. */
|
||||||
|
if (down_trylock(&hdaps_sem)) {
|
||||||
|
mod_timer(&hdaps_timer,jiffies+msecs_to_jiffies(hdaps_poll_ms));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
x -= rest_x;
|
||||||
|
y -= rest_y;
|
||||||
|
if (abs(x) > hdaps_mousedev_threshold)
|
||||||
|
input_report_rel(&hdaps_idev, REL_X, x);
|
||||||
|
if (abs(y) > hdaps_mousedev_threshold)
|
||||||
|
input_report_rel(&hdaps_idev, REL_Y, y);
|
||||||
|
input_sync(&hdaps_idev);
|
||||||
|
|
||||||
|
mod_timer(&hdaps_timer, jiffies + msecs_to_jiffies(hdaps_poll_ms));
|
||||||
|
|
||||||
|
out:
|
||||||
|
up(&hdaps_sem);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* hdaps_mousedev_enable - enable the input class device. Can sleep.
|
||||||
|
*/
|
||||||
|
static void hdaps_mousedev_enable(void)
|
||||||
|
{
|
||||||
|
down(&hdaps_sem);
|
||||||
|
|
||||||
|
/* calibrate the device before enabling */
|
||||||
|
hdaps_calibrate();
|
||||||
|
|
||||||
|
/* initialize the input class */
|
||||||
|
init_input_dev(&hdaps_idev);
|
||||||
|
hdaps_idev.dev = &pdev->dev;
|
||||||
|
hdaps_idev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
|
||||||
|
hdaps_idev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
|
||||||
|
hdaps_idev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT);
|
||||||
|
input_register_device(&hdaps_idev);
|
||||||
|
|
||||||
|
/* start up our timer */
|
||||||
|
init_timer(&hdaps_timer);
|
||||||
|
hdaps_timer.function = hdaps_mousedev_poll;
|
||||||
|
hdaps_timer.expires = jiffies + msecs_to_jiffies(hdaps_poll_ms);
|
||||||
|
add_timer(&hdaps_timer);
|
||||||
|
|
||||||
|
hdaps_mousedev = 1;
|
||||||
|
|
||||||
|
up(&hdaps_sem);
|
||||||
|
|
||||||
|
printk(KERN_INFO "hdaps: input device enabled.\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* hdaps_mousedev_disable - disable the input class device. Caller must hold
|
||||||
|
* hdaps_sem.
|
||||||
|
*/
|
||||||
|
static void hdaps_mousedev_disable(void)
|
||||||
|
{
|
||||||
|
down(&hdaps_sem);
|
||||||
|
if (hdaps_mousedev) {
|
||||||
|
hdaps_mousedev = 0;
|
||||||
|
del_timer_sync(&hdaps_timer);
|
||||||
|
input_unregister_device(&hdaps_idev);
|
||||||
|
}
|
||||||
|
up(&hdaps_sem);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* Device model stuff */
|
||||||
|
|
||||||
|
static int hdaps_probe(struct device *dev)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = hdaps_device_init();
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
printk(KERN_INFO "hdaps: device successfully initialized.\n");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int hdaps_resume(struct device *dev, u32 level)
|
||||||
|
{
|
||||||
|
if (level == RESUME_ENABLE)
|
||||||
|
return hdaps_device_init();
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct device_driver hdaps_driver = {
|
||||||
|
.name = "hdaps",
|
||||||
|
.bus = &platform_bus_type,
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.probe = hdaps_probe,
|
||||||
|
.resume = hdaps_resume
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
/* Sysfs Files */
|
||||||
|
|
||||||
|
static ssize_t hdaps_position_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
int ret, x, y;
|
||||||
|
|
||||||
|
ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return sprintf(buf, "(%d,%d)\n", x, y);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_variance_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
int ret, x, y;
|
||||||
|
|
||||||
|
ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return sprintf(buf, "(%d,%d)\n", x, y);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_temp1_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
u8 temp;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp);
|
||||||
|
if (ret < 0)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return sprintf(buf, "%u\n", temp);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_temp2_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
u8 temp;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp);
|
||||||
|
if (ret < 0)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return sprintf(buf, "%u\n", temp);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_keyboard_activity_show(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity));
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_mouse_activity_show(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity));
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_calibrate_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "(%d,%d)\n", rest_x, rest_y);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_calibrate_store(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
down(&hdaps_sem);
|
||||||
|
hdaps_calibrate();
|
||||||
|
up(&hdaps_sem);
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_invert_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%u\n", hdaps_invert);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_invert_store(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
int invert;
|
||||||
|
|
||||||
|
if (sscanf(buf, "%d", &invert) != 1 || (invert != 1 && invert != 0))
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
hdaps_invert = invert;
|
||||||
|
hdaps_calibrate();
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_mousedev_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%d\n", hdaps_mousedev);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_mousedev_store(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
int enable;
|
||||||
|
|
||||||
|
if (sscanf(buf, "%d", &enable) != 1)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
if (enable == 1)
|
||||||
|
hdaps_mousedev_enable();
|
||||||
|
else if (enable == 0)
|
||||||
|
hdaps_mousedev_disable();
|
||||||
|
else
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_poll_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%lu\n", hdaps_poll_ms);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_poll_store(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
unsigned int poll;
|
||||||
|
|
||||||
|
if (sscanf(buf, "%u", &poll) != 1 || poll == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
hdaps_poll_ms = poll;
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_threshold_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
return sprintf(buf, "%u\n", hdaps_mousedev_threshold);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t hdaps_threshold_store(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
unsigned int threshold;
|
||||||
|
|
||||||
|
if (sscanf(buf, "%u", &threshold) != 1 || threshold == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
hdaps_mousedev_threshold = threshold;
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL);
|
||||||
|
static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL);
|
||||||
|
static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL);
|
||||||
|
static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL);
|
||||||
|
static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL);
|
||||||
|
static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL);
|
||||||
|
static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store);
|
||||||
|
static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store);
|
||||||
|
static DEVICE_ATTR(mousedev, 0644, hdaps_mousedev_show, hdaps_mousedev_store);
|
||||||
|
static DEVICE_ATTR(mousedev_poll_ms, 0644, hdaps_poll_show, hdaps_poll_store);
|
||||||
|
static DEVICE_ATTR(mousedev_threshold, 0644, hdaps_threshold_show,
|
||||||
|
hdaps_threshold_store);
|
||||||
|
|
||||||
|
static struct attribute *hdaps_attributes[] = {
|
||||||
|
&dev_attr_position.attr,
|
||||||
|
&dev_attr_variance.attr,
|
||||||
|
&dev_attr_temp1.attr,
|
||||||
|
&dev_attr_temp2.attr,
|
||||||
|
&dev_attr_keyboard_activity.attr,
|
||||||
|
&dev_attr_mouse_activity.attr,
|
||||||
|
&dev_attr_calibrate.attr,
|
||||||
|
&dev_attr_mousedev.attr,
|
||||||
|
&dev_attr_mousedev_threshold.attr,
|
||||||
|
&dev_attr_mousedev_poll_ms.attr,
|
||||||
|
&dev_attr_invert.attr,
|
||||||
|
NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct attribute_group hdaps_attribute_group = {
|
||||||
|
.attrs = hdaps_attributes,
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
/* Module stuff */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* XXX: We should be able to return nonzero and halt the detection process.
|
||||||
|
* But there is a bug in dmi_check_system() where a nonzero return from the
|
||||||
|
* first match will result in a return of failure from dmi_check_system().
|
||||||
|
* I fixed this; the patch is in 2.6-mm. Once in Linus's tree we can make
|
||||||
|
* hdaps_dmi_match_invert() return hdaps_dmi_match(), which in turn returns 1.
|
||||||
|
*/
|
||||||
|
static int hdaps_dmi_match(struct dmi_system_id *id)
|
||||||
|
{
|
||||||
|
printk(KERN_INFO "hdaps: %s detected.\n", id->ident);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int hdaps_dmi_match_invert(struct dmi_system_id *id)
|
||||||
|
{
|
||||||
|
hdaps_invert = 1;
|
||||||
|
printk(KERN_INFO "hdaps: inverting axis readings.\n");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define HDAPS_DMI_MATCH_NORMAL(model) { \
|
||||||
|
.ident = "IBM " model, \
|
||||||
|
.callback = hdaps_dmi_match, \
|
||||||
|
.matches = { \
|
||||||
|
DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \
|
||||||
|
DMI_MATCH(DMI_PRODUCT_VERSION, model) \
|
||||||
|
} \
|
||||||
|
}
|
||||||
|
|
||||||
|
#define HDAPS_DMI_MATCH_INVERT(model) { \
|
||||||
|
.ident = "IBM " model, \
|
||||||
|
.callback = hdaps_dmi_match_invert, \
|
||||||
|
.matches = { \
|
||||||
|
DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \
|
||||||
|
DMI_MATCH(DMI_PRODUCT_VERSION, model) \
|
||||||
|
} \
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __init hdaps_init(void)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
/* Note that DMI_MATCH(...,"ThinkPad T42") will match "ThinkPad T42p" */
|
||||||
|
struct dmi_system_id hdaps_whitelist[] = {
|
||||||
|
HDAPS_DMI_MATCH_INVERT("ThinkPad R50p"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad R50"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad R51"),
|
||||||
|
HDAPS_DMI_MATCH_INVERT("ThinkPad T41p"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad T41"),
|
||||||
|
HDAPS_DMI_MATCH_INVERT("ThinkPad T42p"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad T42"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad T43"),
|
||||||
|
HDAPS_DMI_MATCH_NORMAL("ThinkPad X40"),
|
||||||
|
{ .ident = NULL }
|
||||||
|
};
|
||||||
|
|
||||||
|
if (!dmi_check_system(hdaps_whitelist)) {
|
||||||
|
printk(KERN_WARNING "hdaps: supported laptop not found!\n");
|
||||||
|
ret = -ENXIO;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) {
|
||||||
|
ret = -ENXIO;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = driver_register(&hdaps_driver);
|
||||||
|
if (ret)
|
||||||
|
goto out_region;
|
||||||
|
|
||||||
|
pdev = platform_device_register_simple("hdaps", -1, NULL, 0);
|
||||||
|
if (IS_ERR(pdev)) {
|
||||||
|
ret = PTR_ERR(pdev);
|
||||||
|
goto out_driver;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group);
|
||||||
|
if (ret)
|
||||||
|
goto out_device;
|
||||||
|
|
||||||
|
if (hdaps_mousedev)
|
||||||
|
hdaps_mousedev_enable();
|
||||||
|
|
||||||
|
printk(KERN_INFO "hdaps: driver successfully loaded.\n");
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
out_device:
|
||||||
|
platform_device_unregister(pdev);
|
||||||
|
out_driver:
|
||||||
|
driver_unregister(&hdaps_driver);
|
||||||
|
out_region:
|
||||||
|
release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
|
||||||
|
out:
|
||||||
|
printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit hdaps_exit(void)
|
||||||
|
{
|
||||||
|
hdaps_mousedev_disable();
|
||||||
|
|
||||||
|
sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
|
||||||
|
platform_device_unregister(pdev);
|
||||||
|
driver_unregister(&hdaps_driver);
|
||||||
|
release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
|
||||||
|
|
||||||
|
printk(KERN_INFO "hdaps: driver unloaded.\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(hdaps_init);
|
||||||
|
module_exit(hdaps_exit);
|
||||||
|
|
||||||
|
module_param_named(mousedev, hdaps_mousedev, bool, 0);
|
||||||
|
MODULE_PARM_DESC(mousedev, "enable the input class device");
|
||||||
|
|
||||||
|
module_param_named(invert, hdaps_invert, bool, 0);
|
||||||
|
MODULE_PARM_DESC(invert, "invert data along each axis");
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Robert Love");
|
||||||
|
MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
Loading…
Reference in a new issue