summaryrefslogtreecommitdiff
path: root/drivers/net/irda/old_belkin.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/irda/old_belkin.c')
-rw-r--r--drivers/net/irda/old_belkin.c164
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 000000000000..26f81fd28371
--- /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);