/********************************************************************* *                 * 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/workqueue.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){	/* we should lock here, but I guess this function is unused...	 * Jean II */	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, "%s()\n", __FUNCTION__ );	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;	spin_lock_irqsave(&self->spinlock, flags);	skb = self->ctrl_skb;		if (!skb) {		skb = dev_alloc_skb(256);		if (!skb) {			spin_unlock_irqrestore(&self->spinlock, 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("%s(), no room for parameter!\n", __FUNCTION__);		spin_unlock_irqrestore(&self->spinlock, flags);		return -1;	}	skb_put(skb, count);	spin_unlock_irqrestore(&self->spinlock, flags);	IRDA_DEBUG(2, "%s(), skb->len=%d\n", __FUNCTION__ , skb->len);	if (flush) {		/* ircomm_tty_do_softint will take care of the rest */		schedule_work(&self->tqueue);	}	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 parameters * */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 = (__u8) param->pv.i;	ASSERT(self != NULL, return -1;);	ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);	if (get) {		param->pv.i = self->settings.service_type;		return 0;	}	/* Find all common service types */	service_type &= self->service_type;	if (!service_type) {		IRDA_DEBUG(2, 			   "%s(), No common service type to use!\n", __FUNCTION__ );		return -1;	}	IRDA_DEBUG(0, "%s(), services in common=%02x\n", __FUNCTION__ ,		   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, "%s(), resulting service type=0x%02x\n", __FUNCTION__ , 		   self->settings.service_type);	/* 	 * Now the line is ready for some communication. Check if we are a         * server, and send over some initial parameters.	 * Client do it in ircomm_tty_state_setup().	 * Note : we may get called from ircomm_tty_getvalue_confirm(),	 * therefore before we even have open any socket. And self->client	 * is initialised to TRUE only later. So, we check if the link is	 * really initialised. - Jean II	 */	if ((self->max_header_size != IRCOMM_TTY_HDR_UNINITIALISED) &&	    (!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.i = IRCOMM_SERIAL;	else {		self->settings.port_type = (__u8) param->pv.i;		IRDA_DEBUG(0, "%s(), port type=%d\n", __FUNCTION__ , 			   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, "%s(), not imp!\n", __FUNCTION__ );	} else {		IRDA_DEBUG(0, "%s(), port-name=%s\n", __FUNCTION__ , 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, "%s(), data rate = %d\n", __FUNCTION__ , 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.i = self->settings.data_format;	else		self->settings.data_format = (__u8) param->pv.i;		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.i = self->settings.flow_control;	else		self->settings.flow_control = (__u8) param->pv.i;	IRDA_DEBUG(1, "%s(), flow control = 0x%02x\n", __FUNCTION__ , (__u8) param->pv.i);	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.i = self->settings.xonxoff[0];		param->pv.i |= self->settings.xonxoff[1] << 8;	} else {		self->settings.xonxoff[0] = (__u16) param->pv.i & 0xff;		self->settings.xonxoff[1] = (__u16) param->pv.i >> 8;	}	IRDA_DEBUG(0, "%s(), XON/XOFF = 0x%02x,0x%02x\n", __FUNCTION__ , 		   param->pv.i & 0xff, param->pv.i >> 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.i = self->settings.enqack[0];		param->pv.i |= self->settings.enqack[1] << 8;	} else {		self->settings.enqack[0] = (__u16) param->pv.i & 0xff;		self->settings.enqack[1] = (__u16) param->pv.i >> 8;	}	IRDA_DEBUG(0, "%s(), ENQ/ACK = 0x%02x,0x%02x\n", __FUNCTION__ ,		   param->pv.i & 0xff, param->pv.i >> 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, "%s(), not impl.\n", __FUNCTION__ );	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.i = self->settings.dte;	else {		dte = (__u8) param->pv.i;		self->settings.dce = 0;						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, "%s(), dce = 0x%02x\n", __FUNCTION__ , (__u8) param->pv.i);	dce = (__u8) param->pv.i;	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, "%s(), CTS \n", __FUNCTION__ );		}	}	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;}