mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
1da177e4c3
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!
283 lines
7.0 KiB
C
283 lines
7.0 KiB
C
/*********************************************************************
|
|
*
|
|
* Filename: tekram.c
|
|
* Version: 1.2
|
|
* Description: Implementation of the Tekram IrMate IR-210B dongle
|
|
* Status: Experimental.
|
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
|
* Created at: Wed Oct 21 20:02:35 1998
|
|
* Modified at: Fri Dec 17 09:13:09 1999
|
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
|
*
|
|
* Copyright (c) 1998-1999 Dag Brattli, 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.
|
|
*
|
|
* 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.
|
|
*
|
|
********************************************************************/
|
|
|
|
#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>
|
|
|
|
static void tekram_open(dongle_t *self, struct qos_info *qos);
|
|
static void tekram_close(dongle_t *self);
|
|
static int tekram_change_speed(struct irda_task *task);
|
|
static int tekram_reset(struct irda_task *task);
|
|
|
|
#define TEKRAM_115200 0x00
|
|
#define TEKRAM_57600 0x01
|
|
#define TEKRAM_38400 0x02
|
|
#define TEKRAM_19200 0x03
|
|
#define TEKRAM_9600 0x04
|
|
|
|
#define TEKRAM_PW 0x10 /* Pulse select bit */
|
|
|
|
static struct dongle_reg dongle = {
|
|
.type = IRDA_TEKRAM_DONGLE,
|
|
.open = tekram_open,
|
|
.close = tekram_close,
|
|
.reset = tekram_reset,
|
|
.change_speed = tekram_change_speed,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init tekram_init(void)
|
|
{
|
|
return irda_device_register_dongle(&dongle);
|
|
}
|
|
|
|
static void __exit tekram_cleanup(void)
|
|
{
|
|
irda_device_unregister_dongle(&dongle);
|
|
}
|
|
|
|
static void tekram_open(dongle_t *self, struct qos_info *qos)
|
|
{
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
|
|
qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
|
|
irda_qos_bits_to_value(qos);
|
|
}
|
|
|
|
static void tekram_close(dongle_t *self)
|
|
{
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
/* Power off dongle */
|
|
self->set_dtr_rts(self->dev, FALSE, FALSE);
|
|
|
|
if (self->reset_task)
|
|
irda_task_delete(self->reset_task);
|
|
if (self->speed_task)
|
|
irda_task_delete(self->speed_task);
|
|
}
|
|
|
|
/*
|
|
* Function tekram_change_speed (dev, state, speed)
|
|
*
|
|
* Set the speed for the Tekram IRMate 210 type dongle. Warning, this
|
|
* function must be called with a process context!
|
|
*
|
|
* Algorithm
|
|
* 1. clear DTR
|
|
* 2. set RTS, and wait at least 7 us
|
|
* 3. send Control Byte to the IR-210 through TXD to set new baud rate
|
|
* wait until the stop bit of Control Byte is sent (for 9600 baud rate,
|
|
* it takes about 100 msec)
|
|
* 5. clear RTS (return to NORMAL Operation)
|
|
* 6. wait at least 50 us, new setting (baud rate, etc) takes effect here
|
|
* after
|
|
*/
|
|
static int tekram_change_speed(struct irda_task *task)
|
|
{
|
|
dongle_t *self = (dongle_t *) task->instance;
|
|
__u32 speed = (__u32) task->param;
|
|
__u8 byte;
|
|
int ret = 0;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
IRDA_ASSERT(task != NULL, return -1;);
|
|
|
|
if (self->speed_task && self->speed_task != task) {
|
|
IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__ );
|
|
return msecs_to_jiffies(10);
|
|
} else
|
|
self->speed_task = task;
|
|
|
|
switch (speed) {
|
|
default:
|
|
case 9600:
|
|
byte = TEKRAM_PW|TEKRAM_9600;
|
|
break;
|
|
case 19200:
|
|
byte = TEKRAM_PW|TEKRAM_19200;
|
|
break;
|
|
case 38400:
|
|
byte = TEKRAM_PW|TEKRAM_38400;
|
|
break;
|
|
case 57600:
|
|
byte = TEKRAM_PW|TEKRAM_57600;
|
|
break;
|
|
case 115200:
|
|
byte = TEKRAM_115200;
|
|
break;
|
|
}
|
|
|
|
switch (task->state) {
|
|
case IRDA_TASK_INIT:
|
|
case IRDA_TASK_CHILD_INIT:
|
|
/*
|
|
* Need to reset the dongle and go to 9600 bps before
|
|
* programming
|
|
*/
|
|
if (irda_task_execute(self, tekram_reset, NULL, task,
|
|
(void *) speed))
|
|
{
|
|
/* Dongle need more time to reset */
|
|
irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
|
|
|
|
/* Give reset 1 sec to finish */
|
|
ret = msecs_to_jiffies(1000);
|
|
} else
|
|
irda_task_next_state(task, IRDA_TASK_CHILD_DONE);
|
|
break;
|
|
case IRDA_TASK_CHILD_WAIT:
|
|
IRDA_WARNING("%s(), resetting dongle timed out!\n",
|
|
__FUNCTION__);
|
|
ret = -1;
|
|
break;
|
|
case IRDA_TASK_CHILD_DONE:
|
|
/* Set DTR, Clear RTS */
|
|
self->set_dtr_rts(self->dev, TRUE, FALSE);
|
|
|
|
/* Wait at least 7us */
|
|
udelay(14);
|
|
|
|
/* Write control byte */
|
|
self->write(self->dev, &byte, 1);
|
|
|
|
irda_task_next_state(task, IRDA_TASK_WAIT);
|
|
|
|
/* Wait at least 100 ms */
|
|
ret = msecs_to_jiffies(150);
|
|
break;
|
|
case IRDA_TASK_WAIT:
|
|
/* Set DTR, Set RTS */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
self->speed_task = NULL;
|
|
break;
|
|
default:
|
|
IRDA_ERROR("%s(), unknown state %d\n",
|
|
__FUNCTION__, task->state);
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
self->speed_task = NULL;
|
|
ret = -1;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function tekram_reset (driver)
|
|
*
|
|
* This function resets the tekram dongle. Warning, this function
|
|
* must be called with a process context!!
|
|
*
|
|
* Algorithm:
|
|
* 0. Clear RTS and DTR, and wait 50 ms (power off the IR-210 )
|
|
* 1. clear RTS
|
|
* 2. set DTR, and wait at least 1 ms
|
|
* 3. clear DTR to SPACE state, wait at least 50 us for further
|
|
* operation
|
|
*/
|
|
int tekram_reset(struct irda_task *task)
|
|
{
|
|
dongle_t *self = (dongle_t *) task->instance;
|
|
int ret = 0;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
IRDA_ASSERT(task != NULL, return -1;);
|
|
|
|
if (self->reset_task && self->reset_task != task) {
|
|
IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__ );
|
|
return msecs_to_jiffies(10);
|
|
} else
|
|
self->reset_task = task;
|
|
|
|
/* Power off dongle */
|
|
//self->set_dtr_rts(self->dev, FALSE, FALSE);
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
switch (task->state) {
|
|
case IRDA_TASK_INIT:
|
|
irda_task_next_state(task, IRDA_TASK_WAIT1);
|
|
|
|
/* Sleep 50 ms */
|
|
ret = msecs_to_jiffies(50);
|
|
break;
|
|
case IRDA_TASK_WAIT1:
|
|
/* Clear DTR, Set RTS */
|
|
self->set_dtr_rts(self->dev, FALSE, TRUE);
|
|
|
|
irda_task_next_state(task, IRDA_TASK_WAIT2);
|
|
|
|
/* Should sleep 1 ms */
|
|
ret = msecs_to_jiffies(1);
|
|
break;
|
|
case IRDA_TASK_WAIT2:
|
|
/* Set DTR, Set RTS */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
/* Wait at least 50 us */
|
|
udelay(75);
|
|
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
self->reset_task = NULL;
|
|
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;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
|
|
MODULE_DESCRIPTION("Tekram IrMate IR-210B dongle driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("irda-dongle-0"); /* IRDA_TEKRAM_DONGLE */
|
|
|
|
/*
|
|
* Function init_module (void)
|
|
*
|
|
* Initialize Tekram module
|
|
*
|
|
*/
|
|
module_init(tekram_init);
|
|
|
|
/*
|
|
* Function cleanup_module (void)
|
|
*
|
|
* Cleanup Tekram module
|
|
*
|
|
*/
|
|
module_exit(tekram_cleanup);
|