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/*******************************************************************************
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
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.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Author:
Pedro Ramalhais <pmr09313@students.fct.unl.pt>
Based on:
av5100.c from http://ipw2100.sourceforge.net/
*******************************************************************************/
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/version.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#define DRV_NAME "pbe5"
#define DRV_VERSION "1.3"
#define DRV_DESCRIPTION "SW RF kill switch for Packard Bell EasyNote E5"
#define DRV_AUTHOR "Pedro Ramalhais"
#define DRV_LICENSE "GPL"
static int radio = 1;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
MODULE_PARM(radio, "i");
#else /* LINUX_VERSION_CODE < 2.6.0 */
#include <linux/moduleparam.h>
module_param(radio, int, 1);
#endif /* LINUX_VERSION_CODE < 2.6.0 */
MODULE_PARM_DESC(radio, "controls state of radio (1=on, 0=off)");
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_LICENSE(DRV_LICENSE);
/*
* NOTE: These values were obtained from disassembling the Icon.exe program
* installed in the Packard Bell EasyNote E5 laptop. The names were guessed,
* so don't rely on them.
*/
#define PBE5_PORT_TOGGLE 0x0b3
#define PBE5_VALUE_TOGGLE_ON 0x01
#define PBE5_VALUE_TOGGLE_OFF 0x00
#define PBE5_PORT_APPLY 0x0b2
#define PBE5_VALUE_APPLY 0xef
// Some "booleans" =;-)
#define PBE5_RADIO_OFF 0
#define PBE5_RADIO_ON 1
static int pbe5_radio_status = PBE5_RADIO_ON;
unsigned char pbe5_get_radio(void)
{
unsigned char val = 0x00;
val = inb(PBE5_PORT_TOGGLE);
return val;
}
static void pbe5_set_radio(int state_set)
{
pbe5_radio_status = pbe5_get_radio();
if (pbe5_radio_status != state_set) {
// Set the radio toggle register
outb(PBE5_VALUE_TOGGLE_ON, PBE5_PORT_TOGGLE);
// Commit the radio toggle register value
outb(PBE5_VALUE_APPLY, PBE5_PORT_APPLY);
// Update the radio status
pbe5_radio_status = pbe5_get_radio();
printk(KERN_INFO DRV_NAME ": Radio turned %s\n",
(state_set == PBE5_RADIO_ON) ? "ON" : "OFF");
} else {
printk(KERN_INFO DRV_NAME ": Radio already %s\n",
(state_set == PBE5_RADIO_ON) ? "ON" : "OFF");
}
}
/*
* proc stuff
*/
static struct proc_dir_entry *dir_base = NULL;
static int proc_set_radio(struct file *file, const char *buffer,
unsigned long count, void *data)
{
pbe5_set_radio(buffer[0] == '0' ? PBE5_RADIO_OFF : PBE5_RADIO_ON);
return count;
}
static int proc_get_radio(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
int len = 0;
len += snprintf(page, count, DRV_NAME ": %d\n",
pbe5_radio_status == PBE5_RADIO_OFF ? 0 : 1);
*eof = 1;
return len;
}
static void pbe5_proc_cleanup(void)
{
if (dir_base) {
remove_proc_entry("radio", dir_base);
remove_proc_entry(DRV_NAME, NULL);
dir_base = NULL;
}
}
static int pbe5_proc_init(void)
{
struct proc_dir_entry *ent;
int err = 0;
dir_base = create_proc_entry(DRV_NAME, S_IFDIR, NULL);
if (dir_base == NULL) {
printk(KERN_ERR DRV_NAME ": Unable to initialise /proc/"
DRV_NAME "\n");
err = -ENOMEM;
goto fail;
}
ent = create_proc_entry("radio", S_IFREG | S_IRUGO | S_IWUSR,
dir_base);
if (ent) {
ent->read_proc = proc_get_radio;
ent->write_proc = proc_set_radio;
} else {
printk(KERN_ERR
"Unable to initialize /proc/" DRV_NAME "/radio\n");
err = -ENOMEM;
goto fail;
}
return 0;
fail:
pbe5_proc_cleanup();
return err;
}
/*
* module stuff
*/
static int __init pbe5_init(void)
{
pbe5_proc_init();
pbe5_set_radio((radio == 1) ? PBE5_RADIO_ON : PBE5_RADIO_OFF);
return 0;
}
static void __exit pbe5_exit(void)
{
pbe5_set_radio(PBE5_RADIO_OFF);
pbe5_proc_cleanup();
}
module_init(pbe5_init);
module_exit(pbe5_exit);
/*
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*/
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