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linux/drivers/net/irda/act200l.c

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/*********************************************************************
*
* Filename: act200l.c
* Version: 0.8
* Description: Implementation for the ACTiSYS ACT-IR200L dongle
* Status: Experimental.
* Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
* Created at: Fri Aug 3 17:35:42 2001
* Modified at: Fri Aug 17 10:22:40 2001
* Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
*
* Copyright (c) 2001 SHIMIZU Takuya, 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/tty.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
static int act200l_reset(struct irda_task *task);
static void act200l_open(dongle_t *self, struct qos_info *qos);
static void act200l_close(dongle_t *self);
static int act200l_change_speed(struct irda_task *task);
/* Regsiter 0: Control register #1 */
#define ACT200L_REG0 0x00
#define ACT200L_TXEN 0x01 /* Enable transmitter */
#define ACT200L_RXEN 0x02 /* Enable receiver */
/* Register 1: Control register #2 */
#define ACT200L_REG1 0x10
#define ACT200L_LODB 0x01 /* Load new baud rate count value */
#define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
/* Register 4: Output Power register */
#define ACT200L_REG4 0x40
#define ACT200L_OP0 0x01 /* Enable LED1C output */
#define ACT200L_OP1 0x02 /* Enable LED2C output */
#define ACT200L_BLKR 0x04
/* Register 5: Receive Mode register */
#define ACT200L_REG5 0x50
#define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
/* Register 6: Receive Sensitivity register #1 */
#define ACT200L_REG6 0x60
#define ACT200L_RS0 0x01 /* receive threshold bit 0 */
#define ACT200L_RS1 0x02 /* receive threshold bit 1 */
/* Register 7: Receive Sensitivity register #2 */
#define ACT200L_REG7 0x70
#define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
/* Register 8,9: Baud Rate Dvider register #1,#2 */
#define ACT200L_REG8 0x80
#define ACT200L_REG9 0x90
#define ACT200L_2400 0x5f
#define ACT200L_9600 0x17
#define ACT200L_19200 0x0b
#define ACT200L_38400 0x05
#define ACT200L_57600 0x03
#define ACT200L_115200 0x01
/* Register 13: Control register #3 */
#define ACT200L_REG13 0xd0
#define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
/* Register 15: Status register */
#define ACT200L_REG15 0xf0
/* Register 21: Control register #4 */
#define ACT200L_REG21 0x50
#define ACT200L_EXCK 0x02 /* Disable clock output driver */
#define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
static struct dongle_reg dongle = {
.type = IRDA_ACT200L_DONGLE,
.open = act200l_open,
.close = act200l_close,
.reset = act200l_reset,
.change_speed = act200l_change_speed,
.owner = THIS_MODULE,
};
static int __init act200l_init(void)
{
return irda_device_register_dongle(&dongle);
}
static void __exit act200l_cleanup(void)
{
irda_device_unregister_dongle(&dongle);
}
static void act200l_open(dongle_t *self, struct qos_info *qos)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
/* Power on the dongle */
self->set_dtr_rts(self->dev, TRUE, TRUE);
/* Set the speeds we can accept */
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
qos->min_turn_time.bits = 0x03;
}
static void act200l_close(dongle_t *self)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
/* Power off the dongle */
self->set_dtr_rts(self->dev, FALSE, FALSE);
}
/*
* Function act200l_change_speed (dev, speed)
*
* Set the speed for the ACTiSYS ACT-IR200L type dongle.
*
*/
static int act200l_change_speed(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u32 speed = (__u32) task->param;
__u8 control[3];
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
self->speed_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
if (irda_task_execute(self, act200l_reset, NULL, task,
(void *) speed))
{
/* Dongle need more time to reset */
irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
/* Give reset 1 sec to finish */
ret = msecs_to_jiffies(1000);
}
break;
case IRDA_TASK_CHILD_WAIT:
IRDA_WARNING("%s(), resetting dongle timed out!\n",
__FUNCTION__);
ret = -1;
break;
case IRDA_TASK_CHILD_DONE:
/* Clear DTR and set RTS to enter command mode */
self->set_dtr_rts(self->dev, FALSE, TRUE);
switch (speed) {
case 9600:
default:
control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
break;
case 19200:
control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
break;
case 38400:
control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
break;
case 57600:
control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
break;
case 115200:
control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
break;
}
control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
/* Write control bytes */
self->write(self->dev, control, 3);
irda_task_next_state(task, IRDA_TASK_WAIT);
ret = msecs_to_jiffies(5);
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_task = NULL;
break;
default:
IRDA_ERROR("%s(), unknown state %d\n",
__FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
ret = -1;
break;
}
return ret;
}
/*
* Function act200l_reset (driver)
*
* Reset the ACTiSYS ACT-IR200L type dongle.
*/
static int act200l_reset(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u8 control[9] = {
ACT200L_REG15,
ACT200L_REG13 | ACT200L_SHDW,
ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
ACT200L_REG13,
ACT200L_REG7 | ACT200L_ENPOS,
ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
ACT200L_REG5 | ACT200L_RWIDL,
ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN
};
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
self->reset_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
/* Power on the dongle */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT1);
ret = msecs_to_jiffies(50);
break;
case IRDA_TASK_WAIT1:
/* Reset the dongle : set RTS low for 25 ms */
self->set_dtr_rts(self->dev, TRUE, FALSE);
irda_task_next_state(task, IRDA_TASK_WAIT2);
ret = msecs_to_jiffies(50);
break;
case IRDA_TASK_WAIT2:
/* Clear DTR and set RTS to enter command mode */
self->set_dtr_rts(self->dev, FALSE, TRUE);
/* Write control bytes */
self->write(self->dev, control, 9);
irda_task_next_state(task, IRDA_TASK_WAIT3);
ret = msecs_to_jiffies(15);
break;
case IRDA_TASK_WAIT3:
/* Go back to normal mode */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
break;
default:
IRDA_ERROR("%s(), unknown state %d\n",
__FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
ret = -1;
break;
}
return ret;
}
MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */
/*
* Function init_module (void)
*
* Initialize ACTiSYS ACT-IR200L module
*
*/
module_init(act200l_init);
/*
* Function cleanup_module (void)
*
* Cleanup ACTiSYS ACT-IR200L module
*
*/
module_exit(act200l_cleanup);
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