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    SubjectRe: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    Hi Jesper,

    Jesper Juhl wrote:

    > I just had a nice chat with the guys there and we got some
    > improvements made by them and us merged up. And I /think/ we agreed
    > that I'll maintain the driver, merge fixes/features etc and eventually
    > try to get it merged.

    Thanks a ton! I am really excited to see that you guys made so much
    progress over the past few days! Of course, I immediately had to give it
    a try :)

    > Currently the driver loads, initializes the accelerometer and we can
    > read data from it.

    And here is a first support request - the kernel module does not load
    for me :(

    I have a Thinkpad T42, running SUSE Linux 9.3 (Kernel 2.6.11 with SUSE
    patches). The APS works on Windows, so I know the accelerometer is there.

    I have downloaded the sources from your site mentioned below, ran "make"
    and "make install". Then I created the /dev/hdaps0 device node by
    running "mknod hdaps0 c 228 0". (I picked this out of another message in
    the discussion)

    However, running "modprobe ibm_hdaps" only yields an error:

    FATAL: Error inserting ibm_hdaps
    (/lib/modules/2.6.11.4-21.7-default/kernel/drivers/misc/ibm_hdaps.ko):
    No such device or address

    In /var/log/messages, I only see:

    Jul 4 07:17:20 metis kernel: ibm_hdaps: unsupported module, tainting
    kernel.
    Jul 4 07:17:20 metis kernel: init 1 50239260

    (The last number differs every time I load the module)
    Passing "debug=1" did not really reveal any more info. How could I
    provide you with more detail?

    I also tried to load Henrik's module, but it also spits out an error
    "failed to allocate I/O", then a long number of "latch_check" lines and
    "initialize() ret: -5".

    Maybe the accelerometer on the T42 uses a different port range? Or could
    it be that some other kernel module is blocking this I/O range? I have
    no clue...

    > I'll be working on adding sysfs stuff to it tomorrow so it's generally
    > useful (at least for monitoring things - not yet for parking disk
    > heads).

    Maybe there is some kind of all-purpose ATA command that instructs the
    disk drive to park the heads? Jens, could you give us a hint on how a
    userspace application would do that?

    > Once I've got the sysfs stuff sorted I'll publish a new version.
    >
    > The most recent version of the driver is currently at
    > http://lemonshop.dk/ibm_hpaps/ (note: this is most likely not going to
    > be the permanent home of this driver, but it's where it lives for
    > now).

    Should we try to move the sources over to the hdaps.sf.net CVS tree?
    Even though I am more a Subversion fan, having at least some kind of
    version control would make it easier for others to participate and make
    sure we can send patches against the latest version.

    > Patches are welcome at jesper.juhl@gmail.com

    Attached please find a diff against ibm_hdaps.c I found on the URL above
    - - I moved some stuff to a separate header file (attached) and added
    printing out the driver name and copyright during module initialization
    (taken from Henrik's files). I also added an "uninstall" target to the
    Makefile.

    I hope you find it useful!

    Bye,
    LenZ
    - --
    - ------------------------------------------------------------------
    Lenz Grimmer <lenz@grimmer.com> -o)
    [ICQ: 160767607 | Jabber: LenZGr@jabber.org] /\\
    http://www.lenzg.org/ V_V
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    --- ibm_hdaps.c.org 2005-07-04 07:33:17.000000000 +0200
    +++ ibm_hdaps.c 2005-07-04 07:42:58.000000000 +0200
    @@ -34,31 +34,18 @@
    #include <linux/delay.h>
    #include <asm/io.h>
    #include <asm/uaccess.h>
    +#include "ibm_hdaps.h"


    +#define DRV_NAME "ibm_hdaps"
    +#define DRV_DESCRIPTION "IBM ThinkPad Accelerometer driver"
    +#define DRV_COPYRIGHT "Copyright (c) 2005 Jesper Juhl <jesper.juhl@gmail.com>"
    +#define DRV_VERSION "0.2"

    -#define HDAPS_LOW_PORT 0x1600 /* first port used by accelerometer */
    -#define HDAPS_NR_PORTS 0x30 /* nr of ports total - 0x1600 through 0x162f */
    -
    -#define STATE_STALE 0x00 /* accelerometer data is stale */
    -#define STATE_FRESH 0x50 /* accelerometer data fresh fresh */
    -
    -#define REFRESH_ASYNC 0x00 /* do asynchronous refresh */
    -#define REFRESH_SYNC 0x01 /* do synchronous refresh */
    -
    -/*
    - * where to find the various accelerometer data
    - * these map to the members of struct hdaps_accel_data
    - */
    -#define HDAPS_PORT_STATE 0x1611
    -#define HDAPS_PORT_XACCEL 0x1612
    -#define HDAPS_PORT_YACCEL 0x1614
    -#define HDAPS_PORT_TEMP 0x1616
    -#define HDAPS_PORT_XVAR 0x1617
    -#define HDAPS_PORT_YVAR 0x1619
    -#define HDAPS_PORT_TEMP2 0x161b
    -#define HDAPS_PORT_UNKNOWN 0x161c
    -#define HDAPS_PORT_KMACCT 0x161d
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR(DRV_COPYRIGHT);
    +MODULE_DESCRIPTION(DRV_DESCRIPTION);
    +MODULE_VERSION(DRV_VERSION);

    static short debug = 0;

    @@ -345,6 +332,9 @@
    int retval;
    struct hdaps_accel_data data;

    + printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
    + printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
    +
    printk(KERN_WARNING "init 1 %08ld\n", jiffies);
    if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "ibm_hdaps"))
    return -ENXIO;
    @@ -367,7 +357,6 @@
    }

    if (0) for (i = 0; i < 50; i++) {
    - int j;
    unsigned long tmp;
    accelerometer_read(&data);
    printk(KERN_WARNING "state = %d\n", data.state);
    @@ -405,8 +394,3 @@
    module_init(ibm_hdaps_init);
    module_exit(ibm_hdaps_exit);

    -MODULE_LICENSE("GPL");
    -MODULE_AUTHOR("Jesper Juhl");
    -
    -MODULE_DESCRIPTION("IBM ThinkPad Accelerometer driver");
    -MODULE_VERSION("0.2");/*
    * Driver for IBM HDAPS (HardDisk Active Protection system)
    *
    * Based on the document by Mark A. Smith available at
    * http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html
    *
    * Copyright (c) 2005 Jesper Juhl <jesper.juhl@gmail.com>
    *
    * 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
    * the Free Software Foundation; either version 2 of the License, or
    * (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
    * but WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    * GNU General Public License for more details.
    *
    * You should have received a copy of the GNU General Public License
    * along with this program; if not, write to the Free Software
    * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    */

    #ifndef __IBM_HDAPS_H__
    #define __IBM_HDAPS_H__

    #define HDAPS_LOW_PORT 0x1600 /* first port used by accelerometer */
    #define HDAPS_NR_PORTS 0x30 /* nr of ports total - 0x1600 through 0x162f */

    #define STATE_STALE 0x00 /* accelerometer data is stale */
    #define STATE_FRESH 0x50 /* accelerometer data fresh fresh */

    #define REFRESH_ASYNC 0x00 /* do asynchronous refresh */
    #define REFRESH_SYNC 0x01 /* do synchronous refresh */

    /*
    * where to find the various accelerometer data
    * these map to the members of struct hdaps_accel_data
    */
    #define HDAPS_PORT_STATE 0x1611
    #define HDAPS_PORT_XACCEL 0x1612
    #define HDAPS_PORT_YACCEL 0x1614
    #define HDAPS_PORT_TEMP 0x1616
    #define HDAPS_PORT_XVAR 0x1617
    #define HDAPS_PORT_YVAR 0x1619
    #define HDAPS_PORT_TEMP2 0x161b
    #define HDAPS_PORT_UNKNOWN 0x161c
    #define HDAPS_PORT_KMACCT 0x161d

    #endif /* __IBM_HDAPS_H__ */
    --- Makefile.org 2005-07-04 07:58:53.000000000 +0200
    +++ Makefile 2005-07-04 07:57:50.000000000 +0200
    @@ -26,3 +26,7 @@
    install -d $(KMISC)
    install -m 644 -c $(addsuffix .ko,$(list-m)) $(KMISC)
    /sbin/depmod -a
    +
    +uninstall:
    + rm -f $(KMISC)/$(addsuffix .ko,$(list-m))
    + /sbin/depmod -a
    \
     
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