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-/*********************************************************************
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- *
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- * Filename: ma600.c
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- * Version: 0.1
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- * Description: Implementation of the MA600 dongle
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- * Status: Experimental.
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- * Author: Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95
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- * Created at: Sat Jun 10 20:02:35 2000
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- * Modified at:
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- * Modified by:
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- *
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- * Note: very thanks to Mr. Maru Wang <maru@mobileaction.com.tw> for providing
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- * information on the MA600 dongle
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- *
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- * Copyright (c) 2000 Leung, All Rights Reserved.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation; either version 2 of
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- * the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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- * MA 02111-1307 USA
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- *
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- ********************************************************************/
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-
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-/* define this macro for release version */
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-//#define NDEBUG
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-
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-#include <linux/module.h>
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-#include <linux/delay.h>
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-#include <linux/tty.h>
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-#include <linux/init.h>
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-
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-#include <net/irda/irda.h>
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-#include <net/irda/irda_device.h>
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-
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-#ifndef NDEBUG
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- #undef IRDA_DEBUG
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- #define IRDA_DEBUG(n, args...) (printk(KERN_DEBUG args))
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-
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- #undef ASSERT
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- #define ASSERT(expr, func) \
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- if(!(expr)) { \
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- printk( "Assertion failed! %s,%s,%s,line=%d\n",\
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- #expr,__FILE__,__FUNCTION__,__LINE__); \
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- func}
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-#endif
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-
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-/* convert hex value to ascii hex */
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-static const char hexTbl[] = "0123456789ABCDEF";
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-
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-
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-static void ma600_open(dongle_t *self, struct qos_info *qos);
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-static void ma600_close(dongle_t *self);
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-static int ma600_change_speed(struct irda_task *task);
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-static int ma600_reset(struct irda_task *task);
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-
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-/* control byte for MA600 */
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-#define MA600_9600 0x00
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-#define MA600_19200 0x01
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-#define MA600_38400 0x02
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-#define MA600_57600 0x03
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-#define MA600_115200 0x04
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-#define MA600_DEV_ID1 0x05
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-#define MA600_DEV_ID2 0x06
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-#define MA600_2400 0x08
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-
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-static struct dongle_reg dongle = {
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- .type = IRDA_MA600_DONGLE,
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- .open = ma600_open,
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- .close = ma600_close,
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- .reset = ma600_reset,
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- .change_speed = ma600_change_speed,
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- .owner = THIS_MODULE,
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-};
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-
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-static int __init ma600_init(void)
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-{
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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- return irda_device_register_dongle(&dongle);
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-}
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-
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-static void __exit ma600_cleanup(void)
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-{
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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- irda_device_unregister_dongle(&dongle);
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-}
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-
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-/*
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- Power on:
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- (0) Clear RTS and DTR for 1 second
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- (1) Set RTS and DTR for 1 second
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- (2) 9600 bps now
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- Note: assume RTS, DTR are clear before
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-*/
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-static void ma600_open(dongle_t *self, struct qos_info *qos)
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-{
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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-
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- qos->baud_rate.bits &= IR_2400|IR_9600|IR_19200|IR_38400
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- |IR_57600|IR_115200;
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- qos->min_turn_time.bits = 0x01; /* Needs at least 1 ms */
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- irda_qos_bits_to_value(qos);
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-
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- //self->set_dtr_rts(self->dev, FALSE, FALSE);
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- // should wait 1 second
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-
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- self->set_dtr_rts(self->dev, TRUE, TRUE);
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- // should wait 1 second
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-}
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-
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-static void ma600_close(dongle_t *self)
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-{
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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-
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- /* Power off dongle */
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- self->set_dtr_rts(self->dev, FALSE, FALSE);
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-}
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-
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-static __u8 get_control_byte(__u32 speed)
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-{
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- __u8 byte;
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-
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- switch (speed) {
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- default:
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- case 115200:
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- byte = MA600_115200;
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- break;
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- case 57600:
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- byte = MA600_57600;
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- break;
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- case 38400:
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- byte = MA600_38400;
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- break;
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- case 19200:
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- byte = MA600_19200;
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- break;
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- case 9600:
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- byte = MA600_9600;
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- break;
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- case 2400:
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- byte = MA600_2400;
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- break;
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- }
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-
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- return byte;
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-}
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-
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-/*
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- * Function ma600_change_speed (dev, state, speed)
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- *
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- * Set the speed for the MA600 type dongle. Warning, this
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- * function must be called with a process context!
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- *
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- * Algorithm
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- * 1. Reset
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- * 2. clear RTS, set DTR and wait for 1ms
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- * 3. send Control Byte to the MA600 through TXD to set new baud rate
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- * wait until the stop bit of Control Byte is sent (for 9600 baud rate,
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- * it takes about 10 msec)
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- * 4. set RTS, set DTR (return to NORMAL Operation)
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- * 5. wait at least 10 ms, new setting (baud rate, etc) takes effect here
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- * after
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- */
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-static int ma600_change_speed(struct irda_task *task)
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-{
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- dongle_t *self = (dongle_t *) task->instance;
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- __u32 speed = (__u32) task->param;
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- static __u8 byte;
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- __u8 byte_echo;
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- int ret = 0;
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-
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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-
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- ASSERT(task != NULL, return -1;);
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-
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- if (self->speed_task && self->speed_task != task) {
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- IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__);
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- return msecs_to_jiffies(10);
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- } else {
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- self->speed_task = task;
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- }
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-
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- switch (task->state) {
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- case IRDA_TASK_INIT:
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- case IRDA_TASK_CHILD_INIT:
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- /*
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- * Need to reset the dongle and go to 9600 bps before
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- * programming
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- */
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- if (irda_task_execute(self, ma600_reset, NULL, task,
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- (void *) speed)) {
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- /* Dongle need more time to reset */
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- irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
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-
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- /* give 1 second to finish */
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- ret = msecs_to_jiffies(1000);
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- } else {
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- irda_task_next_state(task, IRDA_TASK_CHILD_DONE);
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- }
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- break;
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-
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- case IRDA_TASK_CHILD_WAIT:
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- IRDA_WARNING("%s(), resetting dongle timed out!\n",
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- __FUNCTION__);
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- ret = -1;
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- break;
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-
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- case IRDA_TASK_CHILD_DONE:
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- /* Set DTR, Clear RTS */
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- self->set_dtr_rts(self->dev, TRUE, FALSE);
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-
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- ret = msecs_to_jiffies(1); /* Sleep 1 ms */
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- irda_task_next_state(task, IRDA_TASK_WAIT);
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- break;
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-
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- case IRDA_TASK_WAIT:
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- speed = (__u32) task->param;
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- byte = get_control_byte(speed);
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-
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- /* Write control byte */
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- self->write(self->dev, &byte, sizeof(byte));
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-
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- irda_task_next_state(task, IRDA_TASK_WAIT1);
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-
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- /* Wait at least 10 ms */
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- ret = msecs_to_jiffies(15);
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- break;
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-
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- case IRDA_TASK_WAIT1:
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- /* Read control byte echo */
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- self->read(self->dev, &byte_echo, sizeof(byte_echo));
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-
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- if(byte != byte_echo) {
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- /* if control byte != echo, I don't know what to do */
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- printk(KERN_WARNING "%s() control byte written != read!\n", __FUNCTION__);
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- printk(KERN_WARNING "control byte = 0x%c%c\n",
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- hexTbl[(byte>>4)&0x0f], hexTbl[byte&0x0f]);
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- printk(KERN_WARNING "byte echo = 0x%c%c\n",
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- hexTbl[(byte_echo>>4) & 0x0f],
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- hexTbl[byte_echo & 0x0f]);
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- #ifndef NDEBUG
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- } else {
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- IRDA_DEBUG(2, "%s() control byte write read OK\n", __FUNCTION__);
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- #endif
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- }
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-
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- /* Set DTR, Set RTS */
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- self->set_dtr_rts(self->dev, TRUE, TRUE);
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-
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- irda_task_next_state(task, IRDA_TASK_WAIT2);
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-
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- /* Wait at least 10 ms */
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- ret = msecs_to_jiffies(10);
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- break;
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-
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- case IRDA_TASK_WAIT2:
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- irda_task_next_state(task, IRDA_TASK_DONE);
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- self->speed_task = NULL;
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- break;
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-
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- default:
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- IRDA_ERROR("%s(), unknown state %d\n",
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- __FUNCTION__, task->state);
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- irda_task_next_state(task, IRDA_TASK_DONE);
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- self->speed_task = NULL;
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- ret = -1;
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- break;
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- }
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- return ret;
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-}
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-
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-/*
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- * Function ma600_reset (driver)
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- *
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- * This function resets the ma600 dongle. Warning, this function
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- * must be called with a process context!!
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- *
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- * Algorithm:
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- * 0. DTR=0, RTS=1 and wait 10 ms
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- * 1. DTR=1, RTS=1 and wait 10 ms
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- * 2. 9600 bps now
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- */
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-int ma600_reset(struct irda_task *task)
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-{
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- dongle_t *self = (dongle_t *) task->instance;
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- int ret = 0;
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-
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- IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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-
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- ASSERT(task != NULL, return -1;);
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-
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- if (self->reset_task && self->reset_task != task) {
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- IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__);
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- return msecs_to_jiffies(10);
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- } else
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- self->reset_task = task;
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-
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- switch (task->state) {
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- case IRDA_TASK_INIT:
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- /* Clear DTR and Set RTS */
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- self->set_dtr_rts(self->dev, FALSE, TRUE);
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- irda_task_next_state(task, IRDA_TASK_WAIT1);
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- ret = msecs_to_jiffies(10); /* Sleep 10 ms */
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- break;
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- case IRDA_TASK_WAIT1:
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- /* Set DTR and RTS */
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- self->set_dtr_rts(self->dev, TRUE, TRUE);
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- irda_task_next_state(task, IRDA_TASK_WAIT2);
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- ret = msecs_to_jiffies(10); /* Sleep 10 ms */
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- break;
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- case IRDA_TASK_WAIT2:
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- irda_task_next_state(task, IRDA_TASK_DONE);
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- self->reset_task = NULL;
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- break;
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- default:
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- IRDA_ERROR("%s(), unknown state %d\n",
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- __FUNCTION__, task->state);
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- irda_task_next_state(task, IRDA_TASK_DONE);
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- self->reset_task = NULL;
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- ret = -1;
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- }
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- return ret;
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-}
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-
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-MODULE_AUTHOR("Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95");
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-MODULE_DESCRIPTION("MA600 dongle driver version 0.1");
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-MODULE_LICENSE("GPL");
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-MODULE_ALIAS("irda-dongle-11"); /* IRDA_MA600_DONGLE */
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-
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-/*
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- * Function init_module (void)
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- *
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- * Initialize MA600 module
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- *
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- */
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-module_init(ma600_init);
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-
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-/*
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- * Function cleanup_module (void)
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- *
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- * Cleanup MA600 module
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- *
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- */
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-module_exit(ma600_cleanup);
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-
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