mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 15:20:53 +07:00
a97a6f1077
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
210 lines
5.3 KiB
C
210 lines
5.3 KiB
C
/*********************************************************************
|
|
*
|
|
* Filename: litelink.c
|
|
* Version: 1.1
|
|
* Description: Driver for the Parallax LiteLink dongle
|
|
* Status: Stable
|
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
|
* Created at: Fri May 7 12:50:33 1999
|
|
* Modified at: Fri Dec 17 09:14:23 1999
|
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
|
*
|
|
* Copyright (c) 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
********************************************************************/
|
|
|
|
/*
|
|
* Modified at: Thu Jan 15 2003
|
|
* Modified by: Eugene Crosser <crosser@average.org>
|
|
*
|
|
* Convert to "new" IRDA infrastructure for kernel 2.6
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
|
|
#include "sir-dev.h"
|
|
|
|
#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
|
|
#define MAX_DELAY 10000 /* 1 ms */
|
|
|
|
static int litelink_open(struct sir_dev *dev);
|
|
static int litelink_close(struct sir_dev *dev);
|
|
static int litelink_change_speed(struct sir_dev *dev, unsigned speed);
|
|
static int litelink_reset(struct sir_dev *dev);
|
|
|
|
/* These are the baudrates supported - 9600 must be last one! */
|
|
static unsigned baud_rates[] = { 115200, 57600, 38400, 19200, 9600 };
|
|
|
|
static struct dongle_driver litelink = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "Parallax LiteLink",
|
|
.type = IRDA_LITELINK_DONGLE,
|
|
.open = litelink_open,
|
|
.close = litelink_close,
|
|
.reset = litelink_reset,
|
|
.set_speed = litelink_change_speed,
|
|
};
|
|
|
|
static int __init litelink_sir_init(void)
|
|
{
|
|
return irda_register_dongle(&litelink);
|
|
}
|
|
|
|
static void __exit litelink_sir_cleanup(void)
|
|
{
|
|
irda_unregister_dongle(&litelink);
|
|
}
|
|
|
|
static int litelink_open(struct sir_dev *dev)
|
|
{
|
|
struct qos_info *qos = &dev->qos;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __func__);
|
|
|
|
/* Power up dongle */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
|
|
/* Set the speeds we can accept */
|
|
qos->baud_rate.bits &= IR_115200|IR_57600|IR_38400|IR_19200|IR_9600;
|
|
qos->min_turn_time.bits = 0x7f; /* Needs 0.01 ms */
|
|
irda_qos_bits_to_value(qos);
|
|
|
|
/* irda thread waits 50 msec for power settling */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int litelink_close(struct sir_dev *dev)
|
|
{
|
|
IRDA_DEBUG(2, "%s()\n", __func__);
|
|
|
|
/* Power off dongle */
|
|
sirdev_set_dtr_rts(dev, FALSE, FALSE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function litelink_change_speed (task)
|
|
*
|
|
* Change speed of the Litelink dongle. To cycle through the available
|
|
* baud rates, pulse RTS low for a few ms.
|
|
*/
|
|
static int litelink_change_speed(struct sir_dev *dev, unsigned speed)
|
|
{
|
|
int i;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __func__);
|
|
|
|
/* dongle already reset by irda-thread - current speed (dongle and
|
|
* port) is the default speed (115200 for litelink!)
|
|
*/
|
|
|
|
/* Cycle through avaiable baudrates until we reach the correct one */
|
|
for (i = 0; baud_rates[i] != speed; i++) {
|
|
|
|
/* end-of-list reached due to invalid speed request */
|
|
if (baud_rates[i] == 9600)
|
|
break;
|
|
|
|
/* Set DTR, clear RTS */
|
|
sirdev_set_dtr_rts(dev, FALSE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Set DTR, Set RTS */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
}
|
|
|
|
dev->speed = baud_rates[i];
|
|
|
|
/* invalid baudrate should not happen - but if, we return -EINVAL and
|
|
* the dongle configured for 9600 so the stack has a chance to recover
|
|
*/
|
|
|
|
return (dev->speed == speed) ? 0 : -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Function litelink_reset (task)
|
|
*
|
|
* Reset the Litelink type dongle.
|
|
*
|
|
*/
|
|
static int litelink_reset(struct sir_dev *dev)
|
|
{
|
|
IRDA_DEBUG(2, "%s()\n", __func__);
|
|
|
|
/* probably the power-up can be dropped here, but with only
|
|
* 15 usec delay it's not worth the risk unless somebody with
|
|
* the hardware confirms it doesn't break anything...
|
|
*/
|
|
|
|
/* Power on dongle */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Clear RTS to reset dongle */
|
|
sirdev_set_dtr_rts(dev, TRUE, FALSE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Go back to normal mode */
|
|
sirdev_set_dtr_rts(dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* This dongles speed defaults to 115200 bps */
|
|
dev->speed = 115200;
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
|
|
MODULE_DESCRIPTION("Parallax Litelink dongle driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("irda-dongle-5"); /* IRDA_LITELINK_DONGLE */
|
|
|
|
/*
|
|
* Function init_module (void)
|
|
*
|
|
* Initialize Litelink module
|
|
*
|
|
*/
|
|
module_init(litelink_sir_init);
|
|
|
|
/*
|
|
* Function cleanup_module (void)
|
|
*
|
|
* Cleanup Litelink module
|
|
*
|
|
*/
|
|
module_exit(litelink_sir_cleanup);
|