patch-2.2.15 linux/net/irda/ircomm/ircomm_param.c

• Lines: 519
• Date: Fri Apr 21 12:47:16 2000
• Orig file: v2.2.14/net/irda/ircomm/ircomm_param.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/net/irda/ircomm/ircomm_param.c linux/net/irda/ircomm/ircomm_param.c
@@ -0,0 +1,518 @@
+/*********************************************************************
+ *                
+ * 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:   Sun Jan 30 14:32:03 2000
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 1999-2000 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 <linux/sched.h>
+#include <linux/interrupt.h>
+
+#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, irda_param_t *param, 
+				     int get);
+static int ircomm_param_port_type(void *instance, irda_param_t *param, 
+				  int get);
+static int ircomm_param_port_name(void *instance, irda_param_t *param, 
+				  int get);
+static int ircomm_param_service_type(void *instance, irda_param_t *param, 
+				     int get);
+static int ircomm_param_data_rate(void *instance, irda_param_t *param, 
+				  int get);
+static int ircomm_param_data_format(void *instance, irda_param_t *param, 
+				    int get);
+static int ircomm_param_flow_control(void *instance, irda_param_t *param, 
+				     int get);
+static int ircomm_param_xon_xoff(void *instance, irda_param_t *param, int get);
+static int ircomm_param_enq_ack(void *instance, irda_param_t *param, int get);
+static int ircomm_param_line_status(void *instance, irda_param_t *param, 
+				    int get);
+static int ircomm_param_dte(void *instance, irda_param_t *param, int get);
+static int ircomm_param_dce(void *instance, irda_param_t *param, int get);
+static int ircomm_param_poll(void *instance, irda_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_NO_VALUE },
+};
+
+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 tty_struct *tty;
+	unsigned long flags;
+	struct sk_buff *skb;
+	int count;
+
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	tty = self->tty;
+	if (!tty)
+		return 0;
+
+	/* Make sure we don't send parameters for raw mode */
+	if (self->service_type == IRCOMM_3_WIRE_RAW)
+		return 0;
+
+	save_flags(flags);
+	cli();
+
+	skb = self->ctrl_skb;	
+	if (!skb) {
+		skb = dev_alloc_skb(256);
+		if (!skb) {
+			restore_flags(flags);
+			return -ENOMEM;
+		}
+		
+		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) {
+		WARNING(__FUNCTION__ "(), no room for parameter!\n");
+		restore_flags(flags);
+		return -1;
+	}
+	skb_put(skb, count);
+
+	restore_flags(flags);
+
+	IRDA_DEBUG(2, __FUNCTION__ "(), skb->len=%d\n", skb->len);
+
+	if (flush) {
+		/* ircomm_tty_do_softint will take care of the rest */
+		queue_task(&self->tqueue, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
+	}
+
+	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, irda_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->settings.service_type;
+		return 0;
+	}
+
+	/* Find all common service types */
+	service_type &= self->service_type;
+	if (!service_type) {
+		IRDA_DEBUG(2, __FUNCTION__
+			   "(), No common service type to use!\n");
+		return -1;
+	}
+	IRDA_DEBUG(0, __FUNCTION__ "(), services in common=%02x\n",
+		   service_type);
+
+	/*
+	 * Now choose a preferred service type of those available
+	 */
+	if (service_type & IRCOMM_CENTRONICS)
+		self->settings.service_type = IRCOMM_CENTRONICS;
+	else if (service_type & IRCOMM_9_WIRE)
+		self->settings.service_type = IRCOMM_9_WIRE;
+	else if (service_type & IRCOMM_3_WIRE)
+		self->settings.service_type = IRCOMM_3_WIRE;
+	else if (service_type & IRCOMM_3_WIRE_RAW)
+		self->settings.service_type = IRCOMM_3_WIRE_RAW;
+
+	IRDA_DEBUG(0, __FUNCTION__ "(), resulting service type=0x%02x\n", 
+		   self->settings.service_type);
+
+	/* 
+	 * Now the line is ready for some communication. Check if we are a
+         * server, and send over some initial parameters 
+	 */
+	if (!self->client && (self->settings.service_type != IRCOMM_3_WIRE_RAW))
+	{
+		/* Init connection */
+		ircomm_tty_send_initial_parameters(self);
+		ircomm_tty_link_established(self);
+	}
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_port_type (self, param)
+ *
+ *    The port type parameter tells if the devices are serial or parallel.
+ *    Since we only advertise serial service, this parameter should only
+ *    be equal to IRCOMM_SERIAL.
+ */
+static int ircomm_param_port_type(void *instance, irda_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 = IRCOMM_SERIAL;
+	else {
+		self->settings.port_type = param->pv.b;
+
+		IRDA_DEBUG(0, __FUNCTION__ "(), port type=%d\n", 
+			   self->settings.port_type);
+	}
+	return 0;
+}
+
+/*
+ * Function ircomm_param_port_name (self, param)
+ *
+ *    Exchange port name
+ *
+ */
+static int ircomm_param_port_name(void *instance, irda_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) {
+		IRDA_DEBUG(0, __FUNCTION__ "(), not imp!\n");
+	} else {
+		IRDA_DEBUG(0, __FUNCTION__ "(), port-name=%s\n", param->pv.c);
+		strncpy(self->settings.port_name, param->pv.c, 32);
+	}
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_data_rate (self, param)
+ *
+ *    Exchange data rate to be used in this settings
+ *
+ */
+static int ircomm_param_data_rate(void *instance, irda_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->settings.data_rate;
+	else
+		self->settings.data_rate = param->pv.i;
+	
+	IRDA_DEBUG(2, __FUNCTION__ "(), data rate = %d\n", param->pv.i);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_data_format (self, param)
+ *
+ *    Exchange data format to be used in this settings
+ *
+ */
+static int ircomm_param_data_format(void *instance, irda_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->settings.data_format;
+	else
+		self->settings.data_format = param->pv.b;
+	
+	return 0;
+}
+
+/*
+ * Function ircomm_param_flow_control (self, param)
+ *
+ *    Exchange flow control settings to be used in this settings
+ *
+ */
+static int ircomm_param_flow_control(void *instance, irda_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->settings.flow_control;
+	else
+		self->settings.flow_control = param->pv.b;
+
+	IRDA_DEBUG(1, __FUNCTION__ "(), flow control = 0x%02x\n", param->pv.b);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_xon_xoff (self, param)
+ *
+ *    Exchange XON/XOFF characters
+ *
+ */
+static int ircomm_param_xon_xoff(void *instance, irda_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.s = self->settings.xonxoff[0];
+		param->pv.s |= self->settings.xonxoff[1] << 8;
+	} else {
+		self->settings.xonxoff[0] = param->pv.s & 0xff;
+		self->settings.xonxoff[1] = param->pv.s >> 8;
+	}
+
+	IRDA_DEBUG(0, __FUNCTION__ "(), XON/XOFF = 0x%02x,0x%02x\n", 
+		   param->pv.s & 0xff, param->pv.s >> 8);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_enq_ack (self, param)
+ *
+ *    Exchange ENQ/ACK characters
+ *
+ */
+static int ircomm_param_enq_ack(void *instance, irda_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.s = self->settings.enqack[0];
+		param->pv.s |= self->settings.enqack[1] << 8;
+	} else {
+		self->settings.enqack[0] = param->pv.s & 0xff;
+		self->settings.enqack[1] = param->pv.s >> 8;
+	}
+
+	IRDA_DEBUG(0, __FUNCTION__ "(), ENQ/ACK = 0x%02x,0x%02x\n",
+		   param->pv.s & 0xff, param->pv.s >> 8);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_line_status (self, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_line_status(void *instance, irda_param_t *param, 
+				    int get)
+{
+	IRDA_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, irda_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->settings.dte;
+	else {
+		dte = param->pv.b;
+		
+		if (dte & IRCOMM_DELTA_DTR)
+			self->settings.dce |= (IRCOMM_DELTA_DSR|
+					      IRCOMM_DELTA_RI |
+					      IRCOMM_DELTA_CD);
+		if (dte & IRCOMM_DTR)
+			self->settings.dce |= (IRCOMM_DSR|
+					      IRCOMM_RI |
+					      IRCOMM_CD);
+		
+		if (dte & IRCOMM_DELTA_RTS)
+			self->settings.dce |= IRCOMM_DELTA_CTS;
+		if (dte & IRCOMM_RTS)
+			self->settings.dce |= IRCOMM_CTS;
+
+		/* Take appropriate actions */
+		ircomm_tty_check_modem_status(self);
+
+		/* Null modem cable emulator */
+		self->settings.null_modem = TRUE;
+	}
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_dce (instance, param)
+ *
+ *    
+ *
+ */
+static int ircomm_param_dce(void *instance, irda_param_t *param, int get)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	__u8 dce;
+
+	IRDA_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->settings.dce = dce;
+
+	/* Check if any of the settings have changed */
+	if (dce & 0x0f) {
+		if (dce & IRCOMM_DELTA_CTS) {
+			IRDA_DEBUG(2, __FUNCTION__ "(), CTS \n");
+		}
+	}
+
+	ircomm_tty_check_modem_status(self);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_param_poll (instance, param)
+ *
+ *    Called when the peer device is polling for the line settings
+ *
+ */
+static int ircomm_param_poll(void *instance, irda_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;);
+
+	/* Poll parameters are always of lenght 0 (just a signal) */
+	if (!get) {
+		/* Respond with DTE line settings */
+		ircomm_param_request(self, IRCOMM_DTE, TRUE);
+	}
+	return 0;
+}
+
+
+
+
+