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path: root/drivers/net/irda/old_belkin-sir.c
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-rw-r--r--drivers/net/irda/old_belkin-sir.c146
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diff --git a/drivers/net/irda/old_belkin-sir.c b/drivers/net/irda/old_belkin-sir.c
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+/*********************************************************************
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ ********************************************************************/
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+// #include <net/irda/irda_device.h>
+
+#include "sir-dev.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 ;-)
+ */
+
+static int old_belkin_open(struct sir_dev *dev);
+static int old_belkin_close(struct sir_dev *dev);
+static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed);
+static int old_belkin_reset(struct sir_dev *dev);
+
+static struct dongle_driver old_belkin = {
+ .owner = THIS_MODULE,
+ .driver_name = "Old Belkin SmartBeam",
+ .type = IRDA_OLD_BELKIN_DONGLE,
+ .open = old_belkin_open,
+ .close = old_belkin_close,
+ .reset = old_belkin_reset,
+ .set_speed = old_belkin_change_speed,
+};
+
+static int __init old_belkin_sir_init(void)
+{
+ return irda_register_dongle(&old_belkin);
+}
+
+static void __exit old_belkin_sir_cleanup(void)
+{
+ irda_unregister_dongle(&old_belkin);
+}
+
+static int old_belkin_open(struct sir_dev *dev)
+{
+ struct qos_info *qos = &dev->qos;
+
+ /* Power on dongle */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+ /* 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;
+ irda_qos_bits_to_value(qos);
+
+ /* irda thread waits 50 msec for power settling */
+
+ return 0;
+}
+
+static int old_belkin_close(struct sir_dev *dev)
+{
+ /* Power off dongle */
+ sirdev_set_dtr_rts(dev, FALSE, FALSE);
+
+ return 0;
+}
+
+/*
+ * Function old_belkin_change_speed (task)
+ *
+ * With only one speed available, not much to do...
+ */
+static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed)
+{
+ dev->speed = 9600;
+ return (speed==dev->speed) ? 0 : -EINVAL;
+}
+
+/*
+ * Function old_belkin_reset (task)
+ *
+ * Reset the Old-Belkin type dongle.
+ *
+ */
+static int old_belkin_reset(struct sir_dev *dev)
+{
+ /* This dongles speed "defaults" to 9600 bps ;-) */
+ dev->speed = 9600;
+
+ 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 */
+
+module_init(old_belkin_sir_init);
+module_exit(old_belkin_sir_cleanup);