patch-2.4.20 linux-2.4.20/drivers/net/irda/ma600.c

• Lines: 357
• Date: Thu Nov 28 15:53:13 2002
• Orig file: linux-2.4.19/drivers/net/irda/ma600.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/net/irda/ma600.c linux-2.4.20/drivers/net/irda/ma600.c
@@ -0,0 +1,356 @@
+/*********************************************************************
+ *                
+ * Filename:      ma600.c
+ * Version:       0.1
+ * Description:   Implementation of the MA600 dongle
+ * Status:        Experimental.
+ * Author:        Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95
+ * Created at:    Sat Jun 10 20:02:35 2000
+ * Modified at:   
+ * Modified by:   
+ *
+ * Note: very thanks to Mr. Maru Wang <maru@mobileaction.com.tw> for providing 
+ *       information on the MA600 dongle
+ * 
+ *     Copyright (c) 2000 Leung, 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
+ *     
+ ********************************************************************/
+
+/* define this macro for release version */
+//#define NDEBUG
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irda_device.h>
+#include <net/irda/irtty.h>
+
+#ifndef NDEBUG
+	#undef IRDA_DEBUG
+	#define IRDA_DEBUG(n, args...) (printk(KERN_DEBUG args))
+
+	#undef ASSERT(expr, func)
+	#define ASSERT(expr, func) \
+	if(!(expr)) { \
+	        printk( "Assertion failed! %s,%s,%s,line=%d\n",\
+        	#expr,__FILE__,__FUNCTION__,__LINE__); \
+	        ##func}
+#endif
+
+/* convert hex value to ascii hex */
+static const char hexTbl[] = "0123456789ABCDEF";
+
+
+static void ma600_open(dongle_t *self, struct qos_info *qos);
+static void ma600_close(dongle_t *self);
+static int  ma600_change_speed(struct irda_task *task);
+static int  ma600_reset(struct irda_task *task);
+
+/* control byte for MA600 */
+#define MA600_9600	0x00
+#define MA600_19200	0x01
+#define MA600_38400	0x02
+#define MA600_57600	0x03
+#define MA600_115200	0x04
+#define MA600_DEV_ID1	0x05
+#define MA600_DEV_ID2	0x06
+#define MA600_2400	0x08
+
+static struct dongle_reg dongle = {
+	Q_NULL,
+	IRDA_MA600_DONGLE,
+	ma600_open,
+	ma600_close,
+	ma600_reset,
+	ma600_change_speed,
+};
+
+int __init ma600_init(void)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+	return irda_device_register_dongle(&dongle);
+}
+
+void __exit ma600_cleanup(void)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+	irda_device_unregister_dongle(&dongle);
+}
+
+/*
+	Power on:
+		(0) Clear RTS and DTR for 1 second
+		(1) Set RTS and DTR for 1 second
+		(2) 9600 bps now
+	Note: assume RTS, DTR are clear before
+*/
+static void ma600_open(dongle_t *self, struct qos_info *qos)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	qos->baud_rate.bits &= IR_2400|IR_9600|IR_19200|IR_38400
+				|IR_57600|IR_115200;
+	qos->min_turn_time.bits = 0x01;		/* Needs at least 1 ms */	
+	irda_qos_bits_to_value(qos);
+
+	//self->set_dtr_rts(self->dev, FALSE, FALSE);
+	// should wait 1 second
+
+	self->set_dtr_rts(self->dev, TRUE, TRUE);
+	// should wait 1 second
+
+	MOD_INC_USE_COUNT;
+}
+
+static void ma600_close(dongle_t *self)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	/* Power off dongle */
+	self->set_dtr_rts(self->dev, FALSE, FALSE);
+
+	MOD_DEC_USE_COUNT;
+}
+
+static __u8 get_control_byte(__u32 speed)
+{
+	__u8 byte;
+
+	switch (speed) {
+	default:
+	case 115200:
+		byte = MA600_115200;
+		break;
+	case 57600:
+		byte = MA600_57600;
+		break;
+	case 38400:
+		byte = MA600_38400;
+		break;
+	case 19200:
+		byte = MA600_19200;
+		break;
+	case 9600:
+		byte = MA600_9600;
+		break;
+	case 2400:
+		byte = MA600_2400;
+		break;
+	}
+
+	return byte;
+}
+
+/*
+ * Function ma600_change_speed (dev, state, speed)
+ *
+ *    Set the speed for the MA600 type dongle. Warning, this 
+ *    function must be called with a process context!
+ *
+ *    Algorithm
+ *    1. Reset
+ *    2. clear RTS, set DTR and wait for 1ms
+ *    3. send Control Byte to the MA600 through TXD to set new baud rate
+ *       wait until the stop bit of Control Byte is sent (for 9600 baud rate, 
+ *       it takes about 10 msec)
+ *    4. set RTS, set DTR (return to NORMAL Operation)
+ *    5. wait at least 10 ms, new setting (baud rate, etc) takes effect here 
+ *       after
+ */
+static int ma600_change_speed(struct irda_task *task)
+{
+	dongle_t *self = (dongle_t *) task->instance;
+	__u32 speed = (__u32) task->param;
+	static __u8 byte;
+	__u8 byte_echo;
+	int ret = 0;
+	
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	ASSERT(task != NULL, return -1;);
+
+	if (self->speed_task && self->speed_task != task) {
+		IRDA_DEBUG(0, __FUNCTION__ "(), busy!\n");
+		return MSECS_TO_JIFFIES(10);
+	} else {
+		self->speed_task = task;
+	}
+
+	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, ma600_reset, NULL, task, 
+				      (void *) speed)) {
+			/* Dongle need more time to reset */
+			irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
+	
+			/* give 1 second to finish */
+			ret = MSECS_TO_JIFFIES(1000);
+		} else {
+			irda_task_next_state(task, IRDA_TASK_CHILD_DONE);
+		}
+		break;
+
+	case IRDA_TASK_CHILD_WAIT:
+		WARNING(__FUNCTION__ "(), resetting dongle timed out!\n");
+		ret = -1;
+		break;
+
+	case IRDA_TASK_CHILD_DONE:
+		/* Set DTR, Clear RTS */
+		self->set_dtr_rts(self->dev, TRUE, FALSE);
+	
+		ret = MSECS_TO_JIFFIES(1);		/* Sleep 1 ms */
+		irda_task_next_state(task, IRDA_TASK_WAIT);
+		break;
+
+	case IRDA_TASK_WAIT:
+		speed = (__u32) task->param;
+		byte = get_control_byte(speed);
+
+		/* Write control byte */
+		self->write(self->dev, &byte, sizeof(byte));
+		
+		irda_task_next_state(task, IRDA_TASK_WAIT1);
+
+		/* Wait at least 10 ms */
+		ret = MSECS_TO_JIFFIES(15);
+		break;
+
+	case IRDA_TASK_WAIT1:
+		/* Read control byte echo */
+		self->read(self->dev, &byte_echo, sizeof(byte_echo));
+
+		if(byte != byte_echo) {
+			/* if control byte != echo, I don't know what to do */
+			printk(KERN_WARNING __FUNCTION__ "() control byte written != read!\n");
+			printk(KERN_WARNING "control byte = 0x%c%c\n", 
+			       hexTbl[(byte>>4)&0x0f], hexTbl[byte&0x0f]);
+			printk(KERN_WARNING "byte echo = 0x%c%c\n", 
+			       hexTbl[(byte_echo>>4) & 0x0f], 
+			       hexTbl[byte_echo & 0x0f]);
+		#ifndef NDEBUG
+		} else {
+			IRDA_DEBUG(2, __FUNCTION__ "() control byte write read OK\n");
+		#endif
+		}
+
+		/* Set DTR, Set RTS */
+		self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+		irda_task_next_state(task, IRDA_TASK_WAIT2);
+
+		/* Wait at least 10 ms */
+		ret = MSECS_TO_JIFFIES(10);
+		break;
+
+	case IRDA_TASK_WAIT2:
+		irda_task_next_state(task, IRDA_TASK_DONE);
+		self->speed_task = NULL;
+		break;
+
+	default:
+		ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
+		irda_task_next_state(task, IRDA_TASK_DONE);
+		self->speed_task = NULL;
+		ret = -1;
+		break;
+	}
+	return ret;
+}
+
+/*
+ * Function ma600_reset (driver)
+ *
+ *      This function resets the ma600 dongle. Warning, this function 
+ *      must be called with a process context!! 
+ *
+ *      Algorithm:
+ *    	  0. DTR=0, RTS=1 and wait 10 ms
+ *    	  1. DTR=1, RTS=1 and wait 10 ms
+ *        2. 9600 bps now
+ */
+int ma600_reset(struct irda_task *task)
+{
+	dongle_t *self = (dongle_t *) task->instance;
+	int ret = 0;
+
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	ASSERT(task != NULL, return -1;);
+
+	if (self->reset_task && self->reset_task != task) {
+		IRDA_DEBUG(0, __FUNCTION__ "(), busy!\n");
+		return MSECS_TO_JIFFIES(10);
+	} else
+		self->reset_task = task;
+	
+	switch (task->state) {
+	case IRDA_TASK_INIT:
+		/* Clear DTR and Set RTS */
+		self->set_dtr_rts(self->dev, FALSE, TRUE);
+		irda_task_next_state(task, IRDA_TASK_WAIT1);
+		ret = MSECS_TO_JIFFIES(10);		/* Sleep 10 ms */
+		break;
+	case IRDA_TASK_WAIT1:
+		/* Set DTR and RTS */
+		self->set_dtr_rts(self->dev, TRUE, TRUE);
+		irda_task_next_state(task, IRDA_TASK_WAIT2);
+		ret = MSECS_TO_JIFFIES(10);		/* Sleep 10 ms */
+		break;
+	case IRDA_TASK_WAIT2:
+		irda_task_next_state(task, IRDA_TASK_DONE);
+		self->reset_task = NULL;
+		break;
+	default:
+		ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
+		irda_task_next_state(task, IRDA_TASK_DONE);		
+		self->reset_task = NULL;
+		ret = -1;
+	}
+	return ret;
+}
+
+MODULE_AUTHOR("Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95");
+MODULE_DESCRIPTION("MA600 dongle driver version 0.1");
+MODULE_LICENSE("GPL");
+		
+/*
+ * Function init_module (void)
+ *
+ *    Initialize MA600 module
+ *
+ */
+module_init(ma600_init);
+
+/*
+ * Function cleanup_module (void)
+ *
+ *    Cleanup MA600 module
+ *
+ */
+module_exit(ma600_cleanup);
+