1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
165 lines
4.9 KiB
C
165 lines
4.9 KiB
C
/*********************************************************************
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*
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* Filename: old_belkin.c
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* Version: 1.1
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* Description: Driver for the Belkin (old) SmartBeam dongle
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* Status: Experimental...
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* Author: Jean Tourrilhes <jt@hpl.hp.com>
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* Created at: 22/11/99
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* Modified at: Fri Dec 17 09:13:32 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1999 Jean Tourrilhes, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/tty.h>
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#include <linux/init.h>
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#include <net/irda/irda.h>
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#include <net/irda/irda_device.h>
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/*
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* Belkin is selling a dongle called the SmartBeam.
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* In fact, there is two hardware version of this dongle, of course with
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* the same name and looking the exactly same (grrr...).
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* I guess that I've got the old one, because inside I don't have
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* a jumper for IrDA/ASK...
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*
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* As far as I can make it from info on their web site, the old dongle
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* support only 9600 b/s, which make our life much simpler as far as
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* the driver is concerned, but you might not like it very much ;-)
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* The new SmartBeam does 115 kb/s, and I've not tested it...
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*
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* Belkin claim that the correct driver for the old dongle (in Windows)
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* is the generic Parallax 9500a driver, but the Linux LiteLink driver
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* fails for me (probably because Linux-IrDA doesn't rate fallback),
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* so I created this really dumb driver...
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*
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* In fact, this driver doesn't do much. The only thing it does is to
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* prevent Linux-IrDA to use any other speed than 9600 b/s ;-) This
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* driver is called "old_belkin" so that when the new SmartBeam is supported
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* its driver can be called "belkin" instead of "new_belkin".
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*
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* Note : this driver was written without any info/help from Belkin,
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* so a lot of info here might be totally wrong. Blame me ;-)
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*/
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/* Let's guess */
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#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
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static void old_belkin_open(dongle_t *self, struct qos_info *qos);
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static void old_belkin_close(dongle_t *self);
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static int old_belkin_change_speed(struct irda_task *task);
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static int old_belkin_reset(struct irda_task *task);
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/* These are the baudrates supported */
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/* static __u32 baud_rates[] = { 9600 }; */
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static struct dongle_reg dongle = {
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.type = IRDA_OLD_BELKIN_DONGLE,
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.open = old_belkin_open,
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.close = old_belkin_close,
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.reset = old_belkin_reset,
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.change_speed = old_belkin_change_speed,
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.owner = THIS_MODULE,
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};
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static int __init old_belkin_init(void)
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{
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return irda_device_register_dongle(&dongle);
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}
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static void __exit old_belkin_cleanup(void)
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{
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irda_device_unregister_dongle(&dongle);
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}
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static void old_belkin_open(dongle_t *self, struct qos_info *qos)
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{
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/* Not too fast, please... */
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qos->baud_rate.bits &= IR_9600;
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/* Needs at least 10 ms (totally wild guess, can do probably better) */
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qos->min_turn_time.bits = 0x01;
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}
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static void old_belkin_close(dongle_t *self)
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{
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/* Power off dongle */
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self->set_dtr_rts(self->dev, FALSE, FALSE);
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}
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/*
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* Function old_belkin_change_speed (task)
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*
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* With only one speed available, not much to do...
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*/
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static int old_belkin_change_speed(struct irda_task *task)
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{
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irda_task_next_state(task, IRDA_TASK_DONE);
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return 0;
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}
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/*
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* Function old_belkin_reset (task)
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*
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* Reset the Old-Belkin type dongle.
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*
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*/
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static int old_belkin_reset(struct irda_task *task)
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{
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dongle_t *self = (dongle_t *) task->instance;
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/* Power on dongle */
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self->set_dtr_rts(self->dev, TRUE, TRUE);
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/* Sleep a minimum of 15 us */
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udelay(MIN_DELAY);
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/* This dongles speed "defaults" to 9600 bps ;-) */
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self->speed = 9600;
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irda_task_next_state(task, IRDA_TASK_DONE);
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return 0;
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}
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MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>");
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MODULE_DESCRIPTION("Belkin (old) SmartBeam dongle driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("irda-dongle-7"); /* IRDA_OLD_BELKIN_DONGLE */
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/*
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* Function init_module (void)
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*
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* Initialize Old-Belkin module
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*
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*/
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module_init(old_belkin_init);
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/*
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* Function cleanup_module (void)
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*
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* Cleanup Old-Belkin module
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*
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*/
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module_exit(old_belkin_cleanup);
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