Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/irda/actisys.c b/drivers/net/irda/actisys.c
new file mode 100644
index 0000000..b2e31f4
--- /dev/null
+++ b/drivers/net/irda/actisys.c
@@ -0,0 +1,288 @@
+/*********************************************************************
+ *
+ * Filename: actisys.c
+ * Version: 1.0
+ * Description: Implementation for the ACTiSYS IR-220L and IR-220L+
+ * dongles
+ * Status: Beta.
+ * Authors: Dag Brattli <dagb@cs.uit.no> (initially)
+ * Jean Tourrilhes <jt@hpl.hp.com> (new version)
+ * Created at: Wed Oct 21 20:02:35 1998
+ * Modified at: Fri Dec 17 09:10:43 1999
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
+ * Copyright (c) 1999 Jean Tourrilhes
+ *
+ * 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.
+ *
+ * Neither Dag Brattli nor University of Tromsø admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+/*
+ * Changelog
+ *
+ * 0.8 -> 0.9999 - Jean
+ * o New initialisation procedure : much safer and correct
+ * o New procedure the change speed : much faster and simpler
+ * o Other cleanups & comments
+ * Thanks to Lichen Wang @ Actisys for his excellent help...
+ */
+
+#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>
+
+/*
+ * Define the timing of the pulses we send to the dongle (to reset it, and
+ * to toggle speeds). Basically, the limit here is the propagation speed of
+ * the signals through the serial port, the dongle being much faster. Any
+ * serial port support 115 kb/s, so we are sure that pulses 8.5 us wide can
+ * go through cleanly . If you are on the wild side, you can try to lower
+ * this value (Actisys recommended me 2 us, and 0 us work for me on a P233!)
+ */
+#define MIN_DELAY 10 /* 10 us to be on the conservative side */
+
+static int actisys_change_speed(struct irda_task *task);
+static int actisys_reset(struct irda_task *task);
+static void actisys_open(dongle_t *self, struct qos_info *qos);
+static void actisys_close(dongle_t *self);
+
+/* These are the baudrates supported, in the order available */
+/* Note : the 220L doesn't support 38400, but we will fix that below */
+static __u32 baud_rates[] = { 9600, 19200, 57600, 115200, 38400 };
+#define MAX_SPEEDS 5
+
+static struct dongle_reg dongle = {
+ .type = IRDA_ACTISYS_DONGLE,
+ .open = actisys_open,
+ .close = actisys_close,
+ .reset = actisys_reset,
+ .change_speed = actisys_change_speed,
+ .owner = THIS_MODULE,
+};
+
+static struct dongle_reg dongle_plus = {
+ .type = IRDA_ACTISYS_PLUS_DONGLE,
+ .open = actisys_open,
+ .close = actisys_close,
+ .reset = actisys_reset,
+ .change_speed = actisys_change_speed,
+ .owner = THIS_MODULE,
+};
+
+/*
+ * Function actisys_change_speed (task)
+ *
+ * There is two model of Actisys dongle we are dealing with,
+ * the 220L and 220L+. At this point, only irattach knows with
+ * kind the user has requested (it was an argument on irattach
+ * command line).
+ * So, we register a dongle of each sort and let irattach
+ * pick the right one...
+ */
+static int __init actisys_init(void)
+{
+ int ret;
+
+ /* First, register an Actisys 220L dongle */
+ ret = irda_device_register_dongle(&dongle);
+ if (ret < 0)
+ return ret;
+ /* Now, register an Actisys 220L+ dongle */
+ ret = irda_device_register_dongle(&dongle_plus);
+ if (ret < 0) {
+ irda_device_unregister_dongle(&dongle);
+ return ret;
+ }
+ return 0;
+}
+
+static void __exit actisys_cleanup(void)
+{
+ /* We have to remove both dongles */
+ irda_device_unregister_dongle(&dongle);
+ irda_device_unregister_dongle(&dongle_plus);
+}
+
+static void actisys_open(dongle_t *self, struct qos_info *qos)
+{
+ /* Power on the dongle */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+ /* Set the speeds we can accept */
+ qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
+
+ /* Remove support for 38400 if this is not a 220L+ dongle */
+ if (self->issue->type == IRDA_ACTISYS_DONGLE)
+ qos->baud_rate.bits &= ~IR_38400;
+
+ qos->min_turn_time.bits = 0x7f; /* Needs 0.01 ms */
+}
+
+static void actisys_close(dongle_t *self)
+{
+ /* Power off the dongle */
+ self->set_dtr_rts(self->dev, FALSE, FALSE);
+}
+
+/*
+ * Function actisys_change_speed (task)
+ *
+ * Change speed of the ACTiSYS IR-220L and IR-220L+ type IrDA dongles.
+ * To cycle through the available baud rates, pulse RTS low for a few us.
+ *
+ * First, we reset the dongle to always start from a known state.
+ * Then, we cycle through the speeds by pulsing RTS low and then up.
+ * The dongle allow us to pulse quite fast, se we can set speed in one go,
+ * which is must faster ( < 100 us) and less complex than what is found
+ * in some other dongle drivers...
+ * Note that even if the new speed is the same as the current speed,
+ * we reassert the speed. This make sure that things are all right,
+ * and it's fast anyway...
+ * By the way, this function will work for both type of dongles,
+ * because the additional speed is at the end of the sequence...
+ */
+static int actisys_change_speed(struct irda_task *task)
+{
+ dongle_t *self = (dongle_t *) task->instance;
+ __u32 speed = (__u32) task->param; /* Target speed */
+ int ret = 0;
+ int i = 0;
+
+ IRDA_DEBUG(4, "%s(), speed=%d (was %d)\n", __FUNCTION__, speed,
+ self->speed);
+
+ /* Go to a known state by reseting the dongle */
+
+ /* Reset the dongle : set DTR low for 10 us */
+ self->set_dtr_rts(self->dev, FALSE, TRUE);
+ udelay(MIN_DELAY);
+
+ /* Go back to normal mode (we are now at 9600 b/s) */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+ /*
+ * Now, we can set the speed requested. Send RTS pulses until we
+ * reach the target speed
+ */
+ for (i=0; i<MAX_SPEEDS; i++) {
+ if (speed == baud_rates[i]) {
+ self->speed = baud_rates[i];
+ break;
+ }
+ /* Make sure previous pulse is finished */
+ udelay(MIN_DELAY);
+
+ /* Set RTS low for 10 us */
+ self->set_dtr_rts(self->dev, TRUE, FALSE);
+ udelay(MIN_DELAY);
+
+ /* Set RTS high for 10 us */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+ }
+
+ /* Check if life is sweet... */
+ if (i >= MAX_SPEEDS)
+ ret = -1; /* This should not happen */
+
+ /* Basta lavoro, on se casse d'ici... */
+ irda_task_next_state(task, IRDA_TASK_DONE);
+
+ return ret;
+}
+
+/*
+ * Function actisys_reset (task)
+ *
+ * Reset the Actisys type dongle. Warning, this function must only be
+ * called with a process context!
+ *
+ * We need to do two things in this function :
+ * o first make sure that the dongle is in a state where it can operate
+ * o second put the dongle in a know state
+ *
+ * The dongle is powered of the RTS and DTR lines. In the dongle, there
+ * is a big capacitor to accommodate the current spikes. This capacitor
+ * takes a least 50 ms to be charged. In theory, the Bios set those lines
+ * up, so by the time we arrive here we should be set. It doesn't hurt
+ * to be on the conservative side, so we will wait...
+ * Then, we set the speed to 9600 b/s to get in a known state (see in
+ * change_speed for details). It is needed because the IrDA stack
+ * has tried to set the speed immediately after our first return,
+ * so before we can be sure the dongle is up and running.
+ */
+static int actisys_reset(struct irda_task *task)
+{
+ dongle_t *self = (dongle_t *) task->instance;
+ int ret = 0;
+
+ IRDA_ASSERT(task != NULL, return -1;);
+
+ self->reset_task = task;
+
+ switch (task->state) {
+ case IRDA_TASK_INIT:
+ /* Set both DTR & RTS to power up the dongle */
+ /* In theory redundant with power up in actisys_open() */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+ /* Sleep 50 ms to make sure capacitor is charged */
+ ret = msecs_to_jiffies(50);
+ irda_task_next_state(task, IRDA_TASK_WAIT);
+ break;
+ case IRDA_TASK_WAIT:
+ /* Reset the dongle : set DTR low for 10 us */
+ self->set_dtr_rts(self->dev, FALSE, TRUE);
+ udelay(MIN_DELAY);
+
+ /* Go back to normal mode */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+ irda_task_next_state(task, IRDA_TASK_DONE);
+ self->reset_task = NULL;
+ self->speed = 9600; /* That's the default */
+ break;
+ default:
+ IRDA_ERROR("%s(), unknown state %d\n",
+ __FUNCTION__, task->state);
+ irda_task_next_state(task, IRDA_TASK_DONE);
+ self->reset_task = NULL;
+ ret = -1;
+ break;
+ }
+ return ret;
+}
+
+MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no> - Jean Tourrilhes <jt@hpl.hp.com>");
+MODULE_DESCRIPTION("ACTiSYS IR-220L and IR-220L+ dongle driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("irda-dongle-2"); /* IRDA_ACTISYS_DONGLE */
+MODULE_ALIAS("irda-dongle-3"); /* IRDA_ACTISYS_PLUS_DONGLE */
+
+
+/*
+ * Function init_module (void)
+ *
+ * Initialize Actisys module
+ *
+ */
+module_init(actisys_init);
+
+/*
+ * Function cleanup_module (void)
+ *
+ * Cleanup Actisys module
+ *
+ */
+module_exit(actisys_cleanup);