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Diffstat (limited to 'drivers/net/irda/actisys.c')
| -rw-r--r-- | drivers/net/irda/actisys.c | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/drivers/net/irda/actisys.c b/drivers/net/irda/actisys.c deleted file mode 100644 index ae0b80a5680..00000000000 --- a/drivers/net/irda/actisys.c +++ /dev/null @@ -1,288 +0,0 @@ -/********************************************************************* - * - * 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); |