258 lines
7.0 KiB
C
258 lines
7.0 KiB
C
/*********************************************************************
|
|
*
|
|
* 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/init.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
|
|
#include "sir-dev.h"
|
|
|
|
static int act200l_reset(struct sir_dev *dev);
|
|
static int act200l_open(struct sir_dev *dev);
|
|
static int act200l_close(struct sir_dev *dev);
|
|
static int act200l_change_speed(struct sir_dev *dev, unsigned speed);
|
|
|
|
/* 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_driver act200l = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "ACTiSYS ACT-IR200L",
|
|
.type = IRDA_ACT200L_DONGLE,
|
|
.open = act200l_open,
|
|
.close = act200l_close,
|
|
.reset = act200l_reset,
|
|
.set_speed = act200l_change_speed,
|
|
};
|
|
|
|
static int __init act200l_sir_init(void)
|
|
{
|
|
return irda_register_dongle(&act200l);
|
|
}
|
|
|
|
static void __exit act200l_sir_cleanup(void)
|
|
{
|
|
irda_unregister_dongle(&act200l);
|
|
}
|
|
|
|
static int act200l_open(struct sir_dev *dev)
|
|
{
|
|
struct qos_info *qos = &dev->qos;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
/* Power on the dongle */
|
|
sirdev_set_dtr_rts(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;
|
|
irda_qos_bits_to_value(qos);
|
|
|
|
/* irda thread waits 50 msec for power settling */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int act200l_close(struct sir_dev *dev)
|
|
{
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
/* Power off the dongle */
|
|
sirdev_set_dtr_rts(dev, FALSE, FALSE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function act200l_change_speed (dev, speed)
|
|
*
|
|
* Set the speed for the ACTiSYS ACT-IR200L type dongle.
|
|
*
|
|
*/
|
|
static int act200l_change_speed(struct sir_dev *dev, unsigned speed)
|
|
{
|
|
u8 control[3];
|
|
int ret = 0;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
/* Clear DTR and set RTS to enter command mode */
|
|
sirdev_set_dtr_rts(dev, FALSE, TRUE);
|
|
|
|
switch (speed) {
|
|
default:
|
|
ret = -EINVAL;
|
|
/* fall through */
|
|
case 9600:
|
|
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 */
|
|
sirdev_raw_write(dev, control, 3);
|
|
msleep(5);
|
|
|
|
/* Go back to normal mode */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
|
|
dev->speed = speed;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function act200l_reset (driver)
|
|
*
|
|
* Reset the ACTiSYS ACT-IR200L type dongle.
|
|
*/
|
|
|
|
#define ACT200L_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET+1)
|
|
#define ACT200L_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET+2)
|
|
|
|
static int act200l_reset(struct sir_dev *dev)
|
|
{
|
|
unsigned state = dev->fsm.substate;
|
|
unsigned delay = 0;
|
|
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__ );
|
|
|
|
switch (state) {
|
|
case SIRDEV_STATE_DONGLE_RESET:
|
|
/* Reset the dongle : set RTS low for 25 ms */
|
|
sirdev_set_dtr_rts(dev, TRUE, FALSE);
|
|
state = ACT200L_STATE_WAIT1_RESET;
|
|
delay = 50;
|
|
break;
|
|
|
|
case ACT200L_STATE_WAIT1_RESET:
|
|
/* Clear DTR and set RTS to enter command mode */
|
|
sirdev_set_dtr_rts(dev, FALSE, TRUE);
|
|
|
|
udelay(25); /* better wait for some short while */
|
|
|
|
/* Write control bytes */
|
|
sirdev_raw_write(dev, control, sizeof(control));
|
|
state = ACT200L_STATE_WAIT2_RESET;
|
|
delay = 15;
|
|
break;
|
|
|
|
case ACT200L_STATE_WAIT2_RESET:
|
|
/* Go back to normal mode */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
dev->speed = 9600;
|
|
break;
|
|
default:
|
|
IRDA_ERROR("%s(), unknown state %d\n", __FUNCTION__, state);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
dev->fsm.substate = state;
|
|
return (delay > 0) ? delay : 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 */
|
|
|
|
module_init(act200l_sir_init);
|
|
module_exit(act200l_sir_cleanup);
|