/********************************************************************* * * Filename: old_belkin.c * Version: 1.1 * Description: Driver for the Belkin (old) SmartBeam dongle * Status: Experimental... * Author: Jean Tourrilhes <jt@hpl.hp.com> * Created at: 22/11/99 * Modified at: Fri Dec 17 09:13:32 1999 * Modified by: Dag Brattli <dagb@cs.uit.no> * * Copyright (c) 1999 Jean Tourrilhes, 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 * ********************************************************************/ #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> /* * Belkin is selling a dongle called the SmartBeam. * In fact, there is two hardware version of this dongle, of course with * the same name and looking the exactly same (grrr...). * I guess that I've got the old one, because inside I don't have * a jumper for IrDA/ASK... * * As far as I can make it from info on their web site, the old dongle * support only 9600 b/s, which make our life much simpler as far as * the driver is concerned, but you might not like it very much ;-) * The new SmartBeam does 115 kb/s, and I've not tested it... * * Belkin claim that the correct driver for the old dongle (in Windows) * is the generic Parallax 9500a driver, but the Linux LiteLink driver * fails for me (probably because Linux-IrDA doesn't rate fallback), * so I created this really dumb driver... * * In fact, this driver doesn't do much. The only thing it does is to * prevent Linux-IrDA to use any other speed than 9600 b/s ;-) This * driver is called "old_belkin" so that when the new SmartBeam is supported * its driver can be called "belkin" instead of "new_belkin". * * Note : this driver was written without any info/help from Belkin, * so a lot of info here might be totally wrong. Blame me ;-) */ /* Let's guess */ #define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */ static void old_belkin_open(dongle_t *self, struct qos_info *qos); static void old_belkin_close(dongle_t *self); static int old_belkin_change_speed(struct irda_task *task); static int old_belkin_reset(struct irda_task *task); /* These are the baudrates supported */ /* static __u32 baud_rates[] = { 9600 }; */ static struct dongle_reg dongle = { .type = IRDA_OLD_BELKIN_DONGLE, .open = old_belkin_open, .close = old_belkin_close, .reset = old_belkin_reset, .change_speed = old_belkin_change_speed, .owner = THIS_MODULE, }; static int __init old_belkin_init(void) { return irda_device_register_dongle(&dongle); } static void __exit old_belkin_cleanup(void) { irda_device_unregister_dongle(&dongle); } static void old_belkin_open(dongle_t *self, struct qos_info *qos) { /* Not too fast, please... */ qos->baud_rate.bits &= IR_9600; /* Needs at least 10 ms (totally wild guess, can do probably better) */ qos->min_turn_time.bits = 0x01; } static void old_belkin_close(dongle_t *self) { /* Power off dongle */ self->set_dtr_rts(self->dev, FALSE, FALSE); } /* * Function old_belkin_change_speed (task) * * With only one speed available, not much to do... */ static int old_belkin_change_speed(struct irda_task *task) { irda_task_next_state(task, IRDA_TASK_DONE); return 0; } /* * Function old_belkin_reset (task) * * Reset the Old-Belkin type dongle. * */ static int old_belkin_reset(struct irda_task *task) { dongle_t *self = (dongle_t *) task->instance; /* Power on dongle */ self->set_dtr_rts(self->dev, TRUE, TRUE); /* Sleep a minimum of 15 us */ udelay(MIN_DELAY); /* This dongles speed "defaults" to 9600 bps ;-) */ self->speed = 9600; irda_task_next_state(task, IRDA_TASK_DONE); return 0; } MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>"); MODULE_DESCRIPTION("Belkin (old) SmartBeam dongle driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("irda-dongle-7"); /* IRDA_OLD_BELKIN_DONGLE */ /* * Function init_module (void) * * Initialize Old-Belkin module * */ module_init(old_belkin_init); /* * Function cleanup_module (void) * * Cleanup Old-Belkin module * */ module_exit(old_belkin_cleanup);