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/*
* wireless.c Wifi feature
*
* 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, 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.
*
* Written by Mathieu Bérard <mathieu.berard@crans.org>, 2006
*
*/
#include "omnibook.h"
#include "hardware.h"
static int omnibook_wifi_read(char *buffer, struct omnibook_operation *io_op)
{
int len = 0;
int retval;
unsigned int state;
if ((retval = backend_aerial_get(io_op, &state)))
return retval;
len +=
sprintf(buffer + len, "Wifi adapter is %s", (state & WIFI_EX) ? "present" : "absent");
if (state & WIFI_EX)
len +=
sprintf(buffer + len, " and %s", (state & WIFI_STA) ? "enabled" : "disabled");
len += sprintf(buffer + len, ".\n");
len +=
sprintf(buffer + len, "Wifi Kill switch is %s.\n", (state & KILLSWITCH) ? "on" : "off");
return len;
}
static int omnibook_wifi_write(char *buffer, struct omnibook_operation *io_op)
{
int retval = 0;
unsigned int state;
if(mutex_lock_interruptible(&io_op->backend->mutex))
return -ERESTARTSYS;
if ((retval = __backend_aerial_get(io_op, &state)))
goto out;
if (*buffer == '0')
state &= ~WIFI_STA;
else if (*buffer == '1')
state |= WIFI_STA;
else {
retval = -EINVAL;
goto out;
}
if ((retval = __backend_aerial_set(io_op, state)))
return retval;
out:
mutex_unlock(&io_op->backend->mutex);
return retval;
}
static struct omnibook_feature wifi_driver;
static int __init omnibook_wifi_init(struct omnibook_operation *io_op)
{
int retval = 0;
unsigned int state;
/*
* Refuse enabling/disabling a non-existent device
*/
if ((retval = backend_aerial_get(io_op, &state)))
return retval;
if (!(state & WIFI_EX))
wifi_driver.write = NULL;
return retval;
}
static struct omnibook_tbl wireless_table[] __initdata = {
{TSM70 | TSX205, {ACPI,}}, /* stubs to select backend */
{TSM40, {SMI,}}, /* stubs to select backend */
{0,}
};
static struct omnibook_feature __declared_feature wifi_driver = {
.name = "wifi",
.enabled = 1,
.read = omnibook_wifi_read,
.write = omnibook_wifi_write,
.init = omnibook_wifi_init,
.ectypes = TSM70 | TSM40 | TSX205,
.tbl = wireless_table,
};
module_param_named(wifi, wifi_driver.enabled, int, S_IRUGO);
MODULE_PARM_DESC(wifi, "Use 0 to disable, 1 to enable Wifi adapter control");
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