Messages in this thread | | | Date | Thu, 14 Jun 2007 21:17:51 -0300 | From | "Renato S. Yamane" <> | Subject | [Test_Module] Changing brightness in Toshiba notebooks with Phoenix Bios |
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Forwarding from: Toshiba_Linux-Users (tlinux-users@linux.toshiba-dme.co.jp)
============= 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. <jaimeff@gmail.com> * 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 ====================
Best Regards, Renato S. Yamane - 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/
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