patch-2.3.16 linux/net/irda/ircomm/ircomm_param.c

• Lines: 446
• Date: Mon Aug 30 10:26:28 1999
• Orig file: v2.3.15/linux/net/irda/ircomm/ircomm_param.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/net/irda/ircomm/ircomm_param.c linux/net/irda/ircomm/ircomm_param.c
@@ -0,0 +1,445 @@
+/*********************************************************************
+ *                
+ * Filename:      ircomm_param.c
+ * Version:       1.0
+ * Description:   Parameter handling for the IrCOMM protocol
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Mon Jun  7 10:25:11 1999
+ * Modified at:   Wed Aug 25 13:48:14 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 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.
+ * 
+ *     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
+ *     
+ ********************************************************************/
+
+#include <net/irda/irda.h>
+#include <net/irda/parameters.h>
+
+#include <net/irda/ircomm_core.h>
+#include <net/irda/ircomm_tty_attach.h>
+#include <net/irda/ircomm_tty.h>
+
+#include <net/irda/ircomm_param.h>
+
+static int ircomm_param_service_type(void *instance, param_t *param, int get);
+static int ircomm_param_port_type(void *instance, param_t *param, int get);
+static int ircomm_param_port_name(void *instance, param_t *param, int get);
+static int ircomm_param_service_type(void *instance, param_t *param, int get);
+static int ircomm_param_data_rate(void *instance, param_t *param, int get);
+static int ircomm_param_data_format(void *instance, param_t *param, int get);
+static int ircomm_param_flow_control(void *instance, param_t *param, int get);
+static int ircomm_param_xon_xoff(void *instance, param_t *param, int get);
+static int ircomm_param_enq_ack(void *instance, param_t *param, int get);
+static int ircomm_param_line_status(void *instance, param_t *param, int get);
+static int ircomm_param_dte(void *instance, param_t *param, int get);
+static int ircomm_param_dce(void *instance, param_t *param, int get);
+static int ircomm_param_poll(void *instance, param_t *param, int get);
+
+static pi_minor_info_t pi_minor_call_table_common[] = {
+	{ ircomm_param_service_type, PV_INT_8_BITS },
+	{ ircomm_param_port_type,    PV_INT_8_BITS },
+	{ ircomm_param_port_name,    PV_STRING }
+};
+static pi_minor_info_t pi_minor_call_table_non_raw[] = {
+	{ ircomm_param_data_rate,    PV_INT_32_BITS | PV_BIG_ENDIAN },
+	{ ircomm_param_data_format,  PV_INT_8_BITS },
+	{ ircomm_param_flow_control, PV_INT_8_BITS },
+	{ ircomm_param_xon_xoff,     PV_INT_16_BITS },
+	{ ircomm_param_enq_ack,      PV_INT_16_BITS },
+	{ ircomm_param_line_status,  PV_INT_8_BITS }
+};
+static pi_minor_info_t pi_minor_call_table_9_wire[] = {
+	{ ircomm_param_dte,          PV_INT_8_BITS },
+	{ ircomm_param_dce,          PV_INT_8_BITS },
+	{ ircomm_param_poll,         PV_INT_8_BITS },
+};
+
+static pi_major_info_t pi_major_call_table[] = {
+	{ pi_minor_call_table_common,  3 },
+	{ pi_minor_call_table_non_raw, 6 },
+ 	{ pi_minor_call_table_9_wire,  3 }
+/* 	{ pi_minor_call_table_centronics }  */
+};
+
+pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 };
+
+/*
+ * Function ircomm_param_flush (self)
+ *
+ *    Flush (send) out all queued parameters
+ *
+ */
+int ircomm_param_flush(struct ircomm_tty_cb *self)
+{
+	if (self->ctrl_skb) {
+		ircomm_control_request(self->ircomm, self->ctrl_skb);
+		self->ctrl_skb = NULL;	
+	}
+	return 0;
+}
+
+/*
+ * Function ircomm_param_request (self, pi, flush)
+ *
+ *    Queue a parameter for the control channel
+ *
+ */
+int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
+{
+	struct sk_buff *skb;
+	int count;
+
+	DEBUG(2, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (self->state != IRCOMM_TTY_READY) {
+		DEBUG(2, __FUNCTION__ "(), not ready yet!\n");
+		return 0;
+	}
+
+	/* Make sure we don't send parameters for raw mode */
+	if (self->service_type == IRCOMM_3_WIRE_RAW)
+		return 0;
+
+	skb = self->ctrl_skb;
+	
+	if (!skb) {
+		skb = dev_alloc_skb(256);
+		if (!skb)
+			return -1;
+		
+		skb_reserve(skb, self->max_header_size);
+
+		self->ctrl_skb = skb;		
+	}
+	/* 
+	 * Inserting is a little bit tricky since we don't know how much
+	 * room we will need. But this should hopefully work OK 
+	 */
+	count = irda_param_insert(self, pi, skb->tail, skb_tailroom(skb),
+				  &ircomm_param_info);
+	if (count > 0)
+		skb_put(skb, count);
+
+	if (flush) {
+		ircomm_control_request(self->ircomm, skb);
+		self->ctrl_skb = NULL;		
+	}
+	return count;
+}
+
+/*
+ * Function ircomm_param_service_type (self, buf, len)
+ *
+ *    Handle service type, this function will both be called after the LM-IAS
+ *    query and then the remote device sends its initial paramters
+ *
+ */
+static int ircomm_param_service_type(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	__u8 service_type = param->pv.b; /* We know it's a one byte integer */
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (get) {
+		param->pv.b = self->session.service_type;
+		return 0;
+	}
+
+	/*
+	 * Now choose a preferred service type of those available
+	 */
+	if (service_type & IRCOMM_3_WIRE_RAW) {
+		DEBUG(2, __FUNCTION__ "(), peer supports 3 wire raw\n");
+		self->session.service_type |= IRCOMM_3_WIRE_RAW;
+	}
+	if (service_type & IRCOMM_3_WIRE) {
+		DEBUG(2, __FUNCTION__ "(), peer supports 3 wire\n");
+		self->session.service_type |= IRCOMM_3_WIRE;
+	}
+	if (service_type & IRCOMM_9_WIRE) {
+		DEBUG(2, __FUNCTION__ "(), peer supports 9 wire\n");
+		self->session.service_type |= IRCOMM_9_WIRE;
+	}
+	if (service_type & IRCOMM_CENTRONICS) {
+		DEBUG(2, __FUNCTION__ "(), peer supports Centronics\n");
+		self->session.service_type |= IRCOMM_CENTRONICS;
+	}
+	
+	self->session.service_type &= self->service_type;
+	if (!self->session.service_type) {
+		DEBUG(2, __FUNCTION__"(), No common service type to use!\n");
+		return -1;
+	}
+	
+	DEBUG(2, __FUNCTION__ "(), resulting service type=0x%02x\n", 
+	      self->session.service_type);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_port_type (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_port_type(void *instance, param_t *param, int get)
+{
+	DEBUG(0, __FUNCTION__ "(), not impl.\n");
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_port_name (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_port_name(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+	
+	if (get)
+		DEBUG(0, __FUNCTION__ "(), not imp!\n");
+	else
+		DEBUG(0, __FUNCTION__ "(), port-name=%s\n", param->pv.c);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_data_rate (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_data_rate(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (get)
+		param->pv.i = self->session.data_rate;
+	else
+		self->session.data_rate = param->pv.i;
+	
+	DEBUG(2, __FUNCTION__ "(), data rate = %d\n", param->pv.i);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_data_format (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_data_format(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (get)
+		param->pv.b = self->session.data_format;
+	else
+		self->session.data_format = param->pv.b;
+	
+	DEBUG(1, __FUNCTION__ "(), data format = 0x%02x\n", param->pv.b);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_flow_control (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_flow_control(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+	
+	if (get)
+		param->pv.b = self->session.flow_control;
+	else
+		self->session.flow_control = param->pv.b;
+
+	DEBUG(1, __FUNCTION__ "(), flow control = 0x%02x\n", param->pv.b);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_xon_xoff (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_xon_xoff(void *instance, param_t *param, int get)
+{
+	DEBUG(2, __FUNCTION__ "(), not impl.\n");
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_enq_ack (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_enq_ack(void *instance, param_t *param, int get)
+{
+	DEBUG(2, __FUNCTION__ "(), not impl.\n");
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_line_status (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_line_status(void *instance, param_t *param, int get)
+{
+	DEBUG(2, __FUNCTION__ "(), not impl.\n");
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_dte (instance, param)
+ *
+ *    If we get here, there must be some sort of null-modem connection, and
+ *    we are probably working in server mode as well.
+ */
+static int ircomm_param_dte(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	__u8 dte;
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (get)
+		param->pv.b = self->session.dte;
+	else {
+		dte = param->pv.b;
+		
+		/* Null modem cable emulator */
+		self->session.null_modem = TRUE;
+
+		if (dte & IRCOMM_DELTA_DTR)
+			self->session.dce |= (IRCOMM_DELTA_DSR|
+					      IRCOMM_DELTA_RI |
+					      IRCOMM_DELTA_CD);
+		if (dte & IRCOMM_DTR)
+			self->session.dce |= (IRCOMM_DSR|
+					      IRCOMM_RI |
+					      IRCOMM_CD);
+		
+		if (dte & IRCOMM_DELTA_RTS)
+			self->session.dce |= IRCOMM_DELTA_CTS;
+		if (dte & IRCOMM_RTS)
+			self->session.dce |= IRCOMM_CTS;
+
+		/* Take appropriate actions */
+		ircomm_tty_check_modem_status(self);
+
+		/* 
+		 * Send reply, and remember not to set delta values for the
+		 * initial parameters 
+		 */
+		self->session.dte = (IRCOMM_DTR| IRCOMM_RTS);
+		ircomm_param_request(self, IRCOMM_DTE, TRUE);
+	}
+	DEBUG(1, __FUNCTION__ "(), dte = 0x%02x\n", param->pv.b);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_dce (instance, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_dce(void *instance, param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	__u8 dce;
+
+	DEBUG(1, __FUNCTION__ "(), dce = 0x%02x\n", param->pv.b);
+
+	dce = param->pv.b;
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	self->session.dce = dce;
+
+	/* Check if any of the settings have changed */
+	if (dce & 0x0f) {
+		if (dce & IRCOMM_DELTA_CTS) {
+			DEBUG(2, __FUNCTION__ "(), CTS \n");
+		}
+	}
+
+	ircomm_tty_check_modem_status(self);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_poll (instance, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_poll(void *instance, param_t *param, int get)
+{
+	DEBUG(0, __FUNCTION__ "(), not impl.\n");
+
+	return 0;
+}
+
+
+
+
+
+
+
+