[tlinux-users:08497] Re: reg:ToshibaA100-139 Fn key

I made a small module with reverse engeneering of the Windows driver.
I only tested on my Toshiba Satellite Pro A100 and it works.
To compile:
Edit a Makefile and add:
   obj-m := test.o

then run in the same directory:

  make -C /usr/src/linux SUBDIRS=`pwd` modules

Then make the file for the new device:

  mknod test_file c 181 0

Load de module:

  insmod test.ko

And now, if you are very very lucky, maybe it will work:

   echo 3 > test_file

But I warn: THE MOST PROBABLY THING WILL HAPPEN IS THE FREEZE OF THE
LAPTOP IF YOUR MODEL DOESN'T MATCH EXACTLY WITH THE MODEL I TESTED. If
you don't have a Phoenix BIOS don't try this, and if you have.. well..
it's your election x)

Here is the driver

test.c
=================== CUT HERE ===================
/*
 * Module for Toshiba lcd bright change.
 * I only made it for my Toshiba Satellite Pro A100 with Phoenix BIOS
 * I don't know under which models it works (I suppose very few)
 * The asm code I inserted I took it from a disass of the windows
 * driver provided by Toshiba.
 * WARNING:
 * The driver does NOT make any tests if the model is valid or not
 * so, the MOST probably effect of running this will be the hang of
 * the laptop, or something worse.
 * PLEASE DON'T USE THIS unless you really know what you are doing
 * This module isn't made for give support to any Toshiba model,
 * only for tests purpouses , sorry about it.
 *
 * Jaime F. <[email protected]>
 * License: GNU/GPL
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/io.h>

#define DEVICE_NAME "lcd_bright"
#define MAJOR_NUM 181

char *ptr;

static ssize_t
device_write(struct file *file,
             const char __user * buffer, size_t length, loff_t * offset)
{
  char *addr;
  addr=(char *)__pa(ptr);
  addr+=0x10;

  strcpy(ptr, "INVTOS");
  //ptr+=10;
  *(ptr+16)=(char) buffer[0]-0x30;
  //printk("escribiendo %x\n", *ptr);
/*
  inb( 0x2e);
  inb( 0x2f);
  outb(7, 0x2e);
  outb(9, 0x2f);
  v3=inb(0x2f);
  outb2(0x2e, 0x55);
  outb2(0x2e, 7);
  outb2(0x2f,0x10);
  outb2(0x2e,0xe0);
  v4=inb(0x2f);
  outb2(0x2f,2);
  v5=inb(0x2f);
  outb2(0x2f,3);

  outb2(0x2e, 7);
  outb2(0x2f,9);
  outb2(0x2e,0x60);
  v1=inb(0x2f);
  outb2(0x2e,7);
  outb2(0x2f,0x10);
  outb2(0x2e,0xe0);
  outb2(0x2f,0);
  outb2(0x2e, 7);
  outb2(0x2f, 9);
  outb2 ( 0x2e, 0xaa);
  outb2 ( 0x400, 0xAF);
  v2=inb( 0x401);
  outb2( 0x400, 0xAF);
*/

  __asm__("cli\n"
        /*        "mov $0x01E4, %%eax\n"
                  "mov $0x00b0, %%dx\n"
                  "movb $0x02, 0xEF\n"
                  "out %%eax, %%dx\n"
*/
                "mov %0, %%edx\n"
                "mov %%edx, %%edi\n"
                "mov $0x20, %%ecx\n"
                "mov $0x8000f840, %%eax\n mov $0xcf8, %%edx\n out %%eax, %%dx\n"
                "mov $0xcfc, %%dx\n"
                "in %%dx, %%eax\n"
                "and $0x0000ff80, %%eax\n"
                "add $0x2c, %%eax\n"
                "mov %%ax, %%dx\n"
                "in %%dx, %%eax\n"
                "push %%eax\n"
//              "mov %%ax, %%dx\n"
                "xor %%eax, %%eax\n"
                "out %%eax, %%dx\n"
                "mov $0xA2E4, %%eax\n"
                "mov $0xb2, %%dx\n"
                "out %%eax, %%dx\n"
                "pop %%eax\n"
                "mov $0x102c, %%dx\n"
                "out %%eax, %%dx\n"
/*              "movl $0x10, %%edx\n\t"
                "movl %%edx, %%edi\n\t"
                "movl $0x20, %%ecx\n"
                "movw  $0x00E4, %%ax\n"
                "movb  $0x5, %%ah\n"
                "outw  %%ax, $0xb2\n"
                "movl %%eax, %0\n sti\n"
                */
        :
        :"r"(addr): "%eax", "%edx", "%ecx","%edi", "%esi");
  return length;
}

struct file_operations Fops = {
  .write = device_write,
};

int init_module()
{
  int ret_val;
  ptr=(char *)kmalloc(100, GFP_KERNEL);
  ptr+=10;
  ret_val = register_chrdev(MAJOR_NUM, DEVICE_NAME, &Fops);

  if (ret_val < 0)
  {
    printk(KERN_ALERT "El registro del dispositivo falló (%d)\n", ret_val);
    return ret_val;
  }

return 0;
}

void cleanup_module()
{
  int ret;

  ret = unregister_chrdev(MAJOR_NUM, DEVICE_NAME);

  if (ret < 0)
    printk(KERN_ALERT "Error: unregister_chrdev: %d\n", ret);
}

===================== CUT HERE ====================








On 6/14/07, Mathieu Larose <[email protected]> wrote:
> Hi Atul,
>
>  I know it won't be very useful, but I just want to let you know that I'm in
> the same situation as you. I've tried a lot of "solution", but none of these
> worked. I even contacted Toshiba and Phoenix to get information about this
> BIOS, and they refused to tell me anything. Maybe you should try to contact
> Toshiba you too or start to reverse engineering it on Windows :)
>
>  I know that Mathieu on omnibook has received a lot of request to support
> your model, but without information from Toshiba, he won't do anything.
>
>
>  Mathieu
>
>
> 2007/6/13, atul jain <[email protected]>:
> >
> > Hello  all ,
> >
> >                      i  bought  toshiba A100-139  last week   and
> installed debian etch on it .I found that  the fnfx is not functioning
> >                      so , i am unable to  set  lcd brigthness  and also
> since the bios vendor is pheonix , so  i cannot use
> >                      toshiba utils.
> >
> >
> >                     If anyone   any idea reagarding  this  , please let me
> know.
> >
> >
> >
> > waiting for reply
> >
> >
> > Thanks  in advance
> > --
> >
> > Cheers :)
> > Atul
>
>