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/*********************************************************************
*
* Filename: actisys.c
* Version: 0.8
* Description: Implementation for the ACTiSYS IR-220L and IR-220L+
* dongles
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Wed Oct 21 20:02:35 1998
* Modified at: Mon Oct 18 23:37:06 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
*
* 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 of
* the License, or (at your option) any later version.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/tty.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/irda_device.h>
static int actisys_change_speed(struct irda_task *task);
static int actisys_reset(struct irda_task *task);
static void actisys_open(dongle_t *self, struct qos_info *qos);
static void actisys_close(dongle_t *self);
/* These are the baudrates supported */
static __u32 baud_rates[] = { 9600, 19200, 57600, 115200, 38400 };
static struct dongle_reg dongle = {
Q_NULL,
IRDA_ACTISYS_DONGLE,
actisys_open,
actisys_close,
actisys_reset,
actisys_change_speed,
};
static struct dongle_reg dongle_plus = {
Q_NULL,
IRDA_ACTISYS_PLUS_DONGLE,
actisys_open,
actisys_close,
actisys_reset,
actisys_change_speed,
};
int __init actisys_init(void)
{
int ret;
ret = irda_device_register_dongle(&dongle);
if (ret < 0)
return ret;
ret = irda_device_register_dongle(&dongle_plus);
if (ret < 0) {
irda_device_unregister_dongle(&dongle);
return ret;
}
return 0;
}
void actisys_cleanup(void)
{
irda_device_unregister_dongle(&dongle);
irda_device_unregister_dongle(&dongle_plus);
}
static void actisys_open(dongle_t *self, struct qos_info *qos)
{
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
/* Remove support for 38400 if this is not a 220L+ dongle */
if (self->issue->type == IRDA_ACTISYS_DONGLE)
qos->baud_rate.bits &= ~IR_38400;
qos->min_turn_time.bits &= 0x40; /* Needs 0.01 ms */
MOD_INC_USE_COUNT;
}
static void actisys_close(dongle_t *self)
{
/* Power off dongle */
self->set_dtr_rts(self->dev, FALSE, FALSE);
MOD_DEC_USE_COUNT;
}
/*
* Function actisys_change_speed (tty, baud)
*
* Change speed of the ACTiSYS IR-220L and IR-220L+ type IrDA dongles.
* To cycle through the available baud rates, pulse RTS low for a few
* ms.
*/
static int actisys_change_speed(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u32 speed = (__u32) task->param;
__u32 current_speed;
int index = 0;
int ret = 0;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
current_speed = self->speed;
/* Find the correct baudrate index for the currently used baudrate */
while (current_speed != baud_rates[index])
index++;
IRDA_DEBUG(4, __FUNCTION__ "(), index=%d\n", index);
switch (task->state) {
case IRDA_TASK_INIT:
/* Lock dongle */
if (irda_lock((void *) &self->busy) == FALSE) {
IRDA_DEBUG(0, __FUNCTION__ "(), busy!\n");
ret = MSECS_TO_JIFFIES(100);
break;
}
IRDA_DEBUG(4, __FUNCTION__ "(), current baudrate = %d\n",
baud_rates[index]);
/* Set DTR, clear RTS */
self->set_dtr_rts(self->dev, TRUE, FALSE);
irda_task_next_state(task, IRDA_TASK_WAIT1);
/* Wait at a few ms */
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT1:
/* Set DTR, Set RTS */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT2);
/* Wait at a few ms again */
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT2:
/* Go to next baudrate */
if (self->issue->type == IRDA_ACTISYS_DONGLE)
index = (index+1) % 4; /* IR-220L */
else
index = (index+1) % 5; /* IR-220L+ */
current_speed = baud_rates[index];
/* Check if we need to go some more rounds */
if (current_speed != speed)
irda_task_next_state(task, IRDA_TASK_INIT);
else {
irda_task_next_state(task, IRDA_TASK_DONE);
self->busy = 0;
}
break;
default:
ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->busy = 0;
ret = -1;
break;
}
self->speed = speed;
IRDA_DEBUG(4, __FUNCTION__ "(), current baudrate = %d\n",
baud_rates[index]);
return ret;
}
/*
* Function actisys_reset (dev)
*
* Reset the Actisys type dongle. Warning, this function must only be
* called with a process context!
*
* 1. Clear DTR for a few ms.
*/
static int actisys_reset(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
int ret = 0;
ASSERT(task != NULL, return -1;);
switch (task->state) {
case IRDA_TASK_INIT:
/* Clear DTR */
self->set_dtr_rts(self->dev, FALSE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT);
/* Sleep 10-20 ms*/
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT:
/* Go back to normal mode */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed = 9600;
break;
default:
ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
ret = -1;
break;
}
return ret;
}
#ifdef MODULE
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("ACTiSYS IR-220L and IR-220L+ dongle driver");
/*
* Function init_module (void)
*
* Initialize Actisys module
*
*/
int init_module(void)
{
return actisys_init();
}
/*
* Function cleanup_module (void)
*
* Cleanup Actisys module
*
*/
void cleanup_module(void)
{
actisys_cleanup();
}
#endif /* MODULE */
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