patch-2.2.15 linux/drivers/net/irda/old_belkin.c

• Lines: 179
• Date: Fri Apr 21 12:46:17 2000
• Orig file: v2.2.14/drivers/net/irda/old_belkin.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/drivers/net/irda/old_belkin.c linux/drivers/net/irda/old_belkin.c
@@ -0,0 +1,178 @@
+/*********************************************************************
+ *                
+ * 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/sched.h>
+#include <linux/init.h>
+#include <linux/irda.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irmod.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 = {
+	Q_NULL,
+	IRDA_OLD_BELKIN_DONGLE,
+	old_belkin_open,
+	old_belkin_close,
+	old_belkin_reset,
+	old_belkin_change_speed,
+};
+
+int __init old_belkin_init(void)
+{
+	return irda_device_register_dongle(&dongle);
+}
+
+void 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;
+
+	MOD_INC_USE_COUNT;
+}
+
+static void old_belkin_close(dongle_t *self)
+{
+	/* Power off dongle */
+	self->set_dtr_rts(self->dev, FALSE, FALSE);
+
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * 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;
+}
+
+#ifdef MODULE
+MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>");
+MODULE_DESCRIPTION("Belkin (old) SmartBeam dongle driver");	
+
+/*
+ * Function init_module (void)
+ *
+ *    Initialize Old-Belkin module
+ *
+ */
+int init_module(void)
+{
+	return old_belkin_init();
+}
+
+/*
+ * Function cleanup_module (void)
+ *
+ *    Cleanup Old-Belkin module
+ *
+ */
+void cleanup_module(void)
+{
+	old_belkin_cleanup();
+}
+#endif /* MODULE */
+