diff options
Diffstat (limited to 'drivers/net/irda/old_belkin.c')
| -rw-r--r-- | drivers/net/irda/old_belkin.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/net/irda/old_belkin.c b/drivers/net/irda/old_belkin.c new file mode 100644 index 00000000000..26f81fd2837 --- /dev/null +++ b/drivers/net/irda/old_belkin.c @@ -0,0 +1,164 @@ +/********************************************************************* + * + * 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); |