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/*
* mutled.c -- MUTE LED control
*
* 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 Thomas Perl <thp@perli.net>, 2006
* Modified by Mathieu Bérard <mathieu.berard@crans.org>, 2006
*/
#include "omnibook.h"
#include "hardware.h"
static int omnibook_muteled_set(struct omnibook_operation *io_op, int status)
{
int retval = 0;
if(mutex_lock_interruptible(&io_op->backend->mutex))
return -ERESTARTSYS;
if((retval = __omnibook_toggle(io_op, !!status))) {
printk(O_ERR "Failed muteled %s command.\n", status ? "on" : "off");
goto out;
}
io_op->backend->muteled_state = !!status;
out:
mutex_unlock(&io_op->backend->mutex);
return retval;
}
/*
* Hardware query is unsupported, reading is unreliable.
*/
static int omnibook_muteled_read(char *buffer, struct omnibook_operation *io_op)
{
int len = 0;
if(mutex_lock_interruptible(&io_op->backend->mutex))
return -ERESTARTSYS;
len +=
sprintf(buffer + len, "Last mute LED action was an %s command.\n",
io_op->backend->touchpad_state ? "on" : "off");
mutex_unlock(&io_op->backend->mutex);
return len;
}
static int omnibook_muteled_write(char *buffer, struct omnibook_operation *io_op)
{
int cmd;
if (*buffer == '0' || *buffer == '1') {
cmd = *buffer - '0';
if (!omnibook_muteled_set(io_op, cmd)) {
dprintk("Switching mute LED to %s state.\n", cmd ? "on" : "off");
}
} else {
return -EINVAL;
}
return 0;
}
/*
* May re-enable muteled upon resume
*/
static int omnibook_muteled_resume(struct omnibook_operation *io_op)
{
int retval;
mutex_lock(&io_op->backend->mutex);
retval = __omnibook_toggle(io_op, !!io_op->backend->touchpad_state);
mutex_unlock(&io_op->backend->mutex);
return retval;
}
/*
* Switch muteled off upon exit
*/
static void __exit omnibook_muteled_cleanup(struct omnibook_operation *io_op)
{
omnibook_muteled_set(io_op, 0);
}
static struct omnibook_tbl muteled_table[] __initdata = {
{XE4500, COMMAND(KBC, OMNIBOOK_KBC_CMD_MUTELED_ON, OMNIBOOK_KBC_CMD_MUTELED_OFF)},
{0,}
};
static struct omnibook_feature __declared_feature muteled_driver = {
.name = "muteled",
.enabled = 1,
.read = omnibook_muteled_read,
.write = omnibook_muteled_write,
.exit = omnibook_muteled_cleanup,
.resume = omnibook_muteled_resume,
.ectypes = XE4500,
.tbl = muteled_table,
};
module_param_named(muteled, muteled_driver.enabled, int, S_IRUGO);
MODULE_PARM_DESC(muteled, "Use 0 to disable, 1 to enable 'Audo Mute' LED control");
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