[linux.git] / net / irda / ircomm / ircomm_param.c

/*********************************************************************
 *
 * Filename:      ircomm_param.c
 * Version:       1.0
 * Description:   Parameter handling for the IrCOMM protocol
 * Status:        Experimental.
 * Author:        Dag Brattli <[email protected]>
 * Created at:    Mon Jun  7 10:25:11 1999
 * Modified at:   Sun Jan 30 14:32:03 2000
 * Modified by:   Dag Brattli <[email protected]>
 *
 *     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/gfp.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_request (self, pi, flush)
 *
 *    Queue a parameter for the control channel
 *
 */
int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
{
	unsigned long flags;
	struct sk_buff *skb;
	int count;

	IRDA_DEBUG(2, "%s()\n", __func__ );

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);

	/* 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 = alloc_skb(256, GFP_ATOMIC);
		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_pointer(skb),
				  skb_tailroom(skb), &ircomm_param_info);
	if (count < 0) {
		IRDA_WARNING("%s(), no room for parameter!\n", __func__);
		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", __func__ , 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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ );
		return -1;
	}
	IRDA_DEBUG(0, "%s(), services in common=%02x\n", __func__ ,
		   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", __func__ ,
		   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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ ,
			   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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);

	if (get) {
		IRDA_DEBUG(0, "%s(), not imp!\n", __func__ );
	} else {
		IRDA_DEBUG(0, "%s(), port-name=%s\n", __func__ , 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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ , 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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ , (__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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ ,
		   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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ ,
		   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", __func__ );

	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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ , (__u8) param->pv.i);

	dce = (__u8) param->pv.i;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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", __func__ );
		}
	}

	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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);

	/* Poll parameters are always of length 0 (just a signal) */
	if (!get) {
		/* Respond with DTE line settings */
		ircomm_param_request(self, IRCOMM_DTE, TRUE);
	}
	return 0;
}
Commit	Line	Data
1da177e4	1	/*********************************************************************
6819bc2e	2	*
1da177e4 LT	3	* Filename: ircomm_param.c
	4	* Version: 1.0
	5	* Description: Parameter handling for the IrCOMM protocol
	6	* Status: Experimental.
	7	* Author: Dag Brattli <[email protected]>
	8	* Created at: Mon Jun 7 10:25:11 1999
	9	* Modified at: Sun Jan 30 14:32:03 2000
	10	* Modified by: Dag Brattli <[email protected]>
6819bc2e	11	*
1da177e4	12	* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
6819bc2e YH	13	*
	14	* This program is free software; you can redistribute it and/or
	15	* modify it under the terms of the GNU General Public License as
	16	* published by the Free Software Foundation; either version 2 of
1da177e4	17	* the License, or (at your option) any later version.
6819bc2e	18	*
1da177e4 LT	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
6819bc2e YH	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
1da177e4	27	* MA 02111-1307 USA
6819bc2e	28	*
1da177e4 LT	29	********************************************************************/
1da177e4 LT	30
5a0e3ad6	31	#include <linux/gfp.h>
1da177e4 LT	32	#include <linux/workqueue.h>
	33	#include <linux/interrupt.h>
	34
	35	#include <net/irda/irda.h>
	36	#include <net/irda/parameters.h>
	37
	38	#include <net/irda/ircomm_core.h>
	39	#include <net/irda/ircomm_tty_attach.h>
	40	#include <net/irda/ircomm_tty.h>
	41
	42	#include <net/irda/ircomm_param.h>
	43
6819bc2e	44	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4	45	int get);
6819bc2e	46	static int ircomm_param_port_type(void instance, irda_param_t param,
1da177e4	47	int get);
6819bc2e	48	static int ircomm_param_port_name(void instance, irda_param_t param,
1da177e4	49	int get);
6819bc2e	50	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4	51	int get);
6819bc2e	52	static int ircomm_param_data_rate(void instance, irda_param_t param,
1da177e4	53	int get);
6819bc2e	54	static int ircomm_param_data_format(void instance, irda_param_t param,
1da177e4	55	int get);
6819bc2e	56	static int ircomm_param_flow_control(void instance, irda_param_t param,
1da177e4 LT	57	int get);
	58	static int ircomm_param_xon_xoff(void instance, irda_param_t param, int get);
	59	static int ircomm_param_enq_ack(void instance, irda_param_t param, int get);
6819bc2e	60	static int ircomm_param_line_status(void instance, irda_param_t param,
1da177e4 LT	61	int get);
	62	static int ircomm_param_dte(void instance, irda_param_t param, int get);
	63	static int ircomm_param_dce(void instance, irda_param_t param, int get);
	64	static int ircomm_param_poll(void instance, irda_param_t param, int get);
	65
	66	static pi_minor_info_t pi_minor_call_table_common[] = {
	67	{ ircomm_param_service_type, PV_INT_8_BITS },
	68	{ ircomm_param_port_type, PV_INT_8_BITS },
	69	{ ircomm_param_port_name, PV_STRING }
	70	};
	71	static pi_minor_info_t pi_minor_call_table_non_raw[] = {
	72	{ ircomm_param_data_rate, PV_INT_32_BITS \| PV_BIG_ENDIAN },
	73	{ ircomm_param_data_format, PV_INT_8_BITS },
	74	{ ircomm_param_flow_control, PV_INT_8_BITS },
	75	{ ircomm_param_xon_xoff, PV_INT_16_BITS },
	76	{ ircomm_param_enq_ack, PV_INT_16_BITS },
	77	{ ircomm_param_line_status, PV_INT_8_BITS }
	78	};
	79	static pi_minor_info_t pi_minor_call_table_9_wire[] = {
	80	{ ircomm_param_dte, PV_INT_8_BITS },
	81	{ ircomm_param_dce, PV_INT_8_BITS },
	82	{ ircomm_param_poll, PV_NO_VALUE },
	83	};
	84
	85	static pi_major_info_t pi_major_call_table[] = {
	86	{ pi_minor_call_table_common, 3 },
	87	{ pi_minor_call_table_non_raw, 6 },
6819bc2e	88	{ pi_minor_call_table_9_wire, 3 }
1da177e4 LT	89	/* { pi_minor_call_table_centronics } */
	90	};
	91
	92	pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 };
	93
	94	/*
	95	* Function ircomm_param_request (self, pi, flush)
	96	*
	97	* Queue a parameter for the control channel
	98	*
	99	*/
	100	int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
	101	{
1da177e4 LT	102	unsigned long flags;
	103	struct sk_buff *skb;
	104	int count;
	105
0dc47877	106	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	107
	108	IRDA_ASSERT(self != NULL, return -1;);
	109	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	110
1da177e4 LT	111	/* Make sure we don't send parameters for raw mode */
	112	if (self->service_type == IRCOMM_3_WIRE_RAW)
	113	return 0;
	114
	115	spin_lock_irqsave(&self->spinlock, flags);
	116
6819bc2e	117	skb = self->ctrl_skb;
1da177e4	118	if (!skb) {
485fb2c9	119	skb = alloc_skb(256, GFP_ATOMIC);
1da177e4 LT	120	if (!skb) {
	121	spin_unlock_irqrestore(&self->spinlock, flags);
	122	return -ENOMEM;
	123	}
6819bc2e	124
1da177e4 LT	125	skb_reserve(skb, self->max_header_size);
	126	self->ctrl_skb = skb;
	127	}
6819bc2e	128	/*
1da177e4	129	* Inserting is a little bit tricky since we don't know how much
6819bc2e	130	* room we will need. But this should hopefully work OK
1da177e4	131	*/
27a884dc ACM	132	count = irda_param_insert(self, pi, skb_tail_pointer(skb),
27a884dc ACM	133	skb_tailroom(skb), &ircomm_param_info);
1da177e4	134	if (count < 0) {
0dc47877	135	IRDA_WARNING("%s(), no room for parameter!\n", __func__);
1da177e4 LT	136	spin_unlock_irqrestore(&self->spinlock, flags);
	137	return -1;
	138	}
	139	skb_put(skb, count);
	140
	141	spin_unlock_irqrestore(&self->spinlock, flags);
	142
0dc47877	143	IRDA_DEBUG(2, "%s(), skb->len=%d\n", __func__ , skb->len);
1da177e4 LT	144
	145	if (flush) {
	146	/* ircomm_tty_do_softint will take care of the rest */
	147	schedule_work(&self->tqueue);
	148	}
	149
	150	return count;
	151	}
	152
	153	/*
	154	* Function ircomm_param_service_type (self, buf, len)
	155	*
	156	* Handle service type, this function will both be called after the LM-IAS
	157	* query and then the remote device sends its initial parameters
	158	*
	159	*/
6819bc2e	160	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4 LT	161	int get)
	162	{
	163	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	164	__u8 service_type = (__u8) param->pv.i;
	165
	166	IRDA_ASSERT(self != NULL, return -1;);
	167	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	168
	169	if (get) {
	170	param->pv.i = self->settings.service_type;
	171	return 0;
	172	}
	173
	174	/* Find all common service types */
	175	service_type &= self->service_type;
	176	if (!service_type) {
6819bc2e	177	IRDA_DEBUG(2,
0dc47877	178	"%s(), No common service type to use!\n", __func__ );
1da177e4 LT	179	return -1;
1da177e4 LT	180	}
0dc47877	181	IRDA_DEBUG(0, "%s(), services in common=%02x\n", __func__ ,
1da177e4 LT	182	service_type);
	183
	184	/*
	185	* Now choose a preferred service type of those available
	186	*/
	187	if (service_type & IRCOMM_CENTRONICS)
	188	self->settings.service_type = IRCOMM_CENTRONICS;
	189	else if (service_type & IRCOMM_9_WIRE)
	190	self->settings.service_type = IRCOMM_9_WIRE;
	191	else if (service_type & IRCOMM_3_WIRE)
	192	self->settings.service_type = IRCOMM_3_WIRE;
	193	else if (service_type & IRCOMM_3_WIRE_RAW)
	194	self->settings.service_type = IRCOMM_3_WIRE_RAW;
	195
0dc47877	196	IRDA_DEBUG(0, "%s(), resulting service type=0x%02x\n", __func__ ,
1da177e4 LT	197	self->settings.service_type);
1da177e4 LT	198
6819bc2e	199	/*
1da177e4	200	* Now the line is ready for some communication. Check if we are a
6819bc2e	201	* server, and send over some initial parameters.
1da177e4 LT	202	* Client do it in ircomm_tty_state_setup().
	203	* Note : we may get called from ircomm_tty_getvalue_confirm(),
	204	* therefore before we even have open any socket. And self->client
	205	* is initialised to TRUE only later. So, we check if the link is
	206	* really initialised. - Jean II
	207	*/
	208	if ((self->max_header_size != IRCOMM_TTY_HDR_UNINITIALISED) &&
	209	(!self->client) &&
	210	(self->settings.service_type != IRCOMM_3_WIRE_RAW))
	211	{
	212	/* Init connection */
	213	ircomm_tty_send_initial_parameters(self);
	214	ircomm_tty_link_established(self);
	215	}
	216
	217	return 0;
	218	}
	219
	220	/*
	221	* Function ircomm_param_port_type (self, param)
	222	*
	223	* The port type parameter tells if the devices are serial or parallel.
	224	* Since we only advertise serial service, this parameter should only
	225	* be equal to IRCOMM_SERIAL.
	226	*/
	227	static int ircomm_param_port_type(void instance, irda_param_t param, int get)
	228	{
	229	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	230
	231	IRDA_ASSERT(self != NULL, return -1;);
	232	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	233
1da177e4 LT	234	if (get)
	235	param->pv.i = IRCOMM_SERIAL;
	236	else {
	237	self->settings.port_type = (__u8) param->pv.i;
	238
0dc47877	239	IRDA_DEBUG(0, "%s(), port type=%d\n", __func__ ,
1da177e4 LT	240	self->settings.port_type);
	241	}
	242	return 0;
	243	}
	244
	245	/*
	246	* Function ircomm_param_port_name (self, param)
	247	*
	248	* Exchange port name
	249	*
	250	*/
	251	static int ircomm_param_port_name(void instance, irda_param_t param, int get)
	252	{
	253	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
6819bc2e	254
1da177e4 LT	255	IRDA_ASSERT(self != NULL, return -1;);
	256	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	257
	258	if (get) {
0dc47877	259	IRDA_DEBUG(0, "%s(), not imp!\n", __func__ );
1da177e4	260	} else {
0dc47877	261	IRDA_DEBUG(0, "%s(), port-name=%s\n", __func__ , param->pv.c);
1da177e4 LT	262	strncpy(self->settings.port_name, param->pv.c, 32);
	263	}
	264
	265	return 0;
	266	}
	267
	268	/*
	269	* Function ircomm_param_data_rate (self, param)
	270	*
	271	* Exchange data rate to be used in this settings
	272	*
	273	*/
	274	static int ircomm_param_data_rate(void instance, irda_param_t param, int get)
	275	{
	276	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
6819bc2e	277
1da177e4 LT	278	IRDA_ASSERT(self != NULL, return -1;);
	279	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	280
	281	if (get)
	282	param->pv.i = self->settings.data_rate;
	283	else
	284	self->settings.data_rate = param->pv.i;
6819bc2e	285
0dc47877	286	IRDA_DEBUG(2, "%s(), data rate = %d\n", __func__ , param->pv.i);
1da177e4 LT	287
	288	return 0;
	289	}
	290
	291	/*
	292	* Function ircomm_param_data_format (self, param)
	293	*
	294	* Exchange data format to be used in this settings
	295	*
	296	*/
6819bc2e	297	static int ircomm_param_data_format(void instance, irda_param_t param,
1da177e4 LT	298	int get)
	299	{
	300	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	301
	302	IRDA_ASSERT(self != NULL, return -1;);
	303	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	304
	305	if (get)
	306	param->pv.i = self->settings.data_format;
	307	else
	308	self->settings.data_format = (__u8) param->pv.i;
6819bc2e	309
1da177e4 LT	310	return 0;
	311	}
	312
	313	/*
	314	* Function ircomm_param_flow_control (self, param)
	315	*
	316	* Exchange flow control settings to be used in this settings
	317	*
	318	*/
6819bc2e	319	static int ircomm_param_flow_control(void instance, irda_param_t param,
1da177e4 LT	320	int get)
	321	{
	322	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	323
	324	IRDA_ASSERT(self != NULL, return -1;);
	325	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	326
1da177e4 LT	327	if (get)
	328	param->pv.i = self->settings.flow_control;
	329	else
	330	self->settings.flow_control = (__u8) param->pv.i;
	331
0dc47877	332	IRDA_DEBUG(1, "%s(), flow control = 0x%02x\n", __func__ , (__u8) param->pv.i);
1da177e4 LT	333
	334	return 0;
	335	}
	336
	337	/*
	338	* Function ircomm_param_xon_xoff (self, param)
	339	*
	340	* Exchange XON/XOFF characters
	341	*
	342	*/
	343	static int ircomm_param_xon_xoff(void instance, irda_param_t param, int get)
	344	{
	345	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	346
	347	IRDA_ASSERT(self != NULL, return -1;);
	348	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	349
1da177e4 LT	350	if (get) {
	351	param->pv.i = self->settings.xonxoff[0];
	352	param->pv.i \|= self->settings.xonxoff[1] << 8;
	353	} else {
	354	self->settings.xonxoff[0] = (__u16) param->pv.i & 0xff;
	355	self->settings.xonxoff[1] = (__u16) param->pv.i >> 8;
	356	}
	357
0dc47877	358	IRDA_DEBUG(0, "%s(), XON/XOFF = 0x%02x,0x%02x\n", __func__ ,
1da177e4 LT	359	param->pv.i & 0xff, param->pv.i >> 8);
	360
	361	return 0;
	362	}
	363
	364	/*
	365	* Function ircomm_param_enq_ack (self, param)
	366	*
	367	* Exchange ENQ/ACK characters
	368	*
	369	*/
	370	static int ircomm_param_enq_ack(void instance, irda_param_t param, int get)
	371	{
	372	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	373
	374	IRDA_ASSERT(self != NULL, return -1;);
	375	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	376
1da177e4 LT	377	if (get) {
	378	param->pv.i = self->settings.enqack[0];
	379	param->pv.i \|= self->settings.enqack[1] << 8;
	380	} else {
	381	self->settings.enqack[0] = (__u16) param->pv.i & 0xff;
	382	self->settings.enqack[1] = (__u16) param->pv.i >> 8;
	383	}
	384
0dc47877	385	IRDA_DEBUG(0, "%s(), ENQ/ACK = 0x%02x,0x%02x\n", __func__ ,
1da177e4 LT	386	param->pv.i & 0xff, param->pv.i >> 8);
	387
	388	return 0;
	389	}
	390
	391	/*
	392	* Function ircomm_param_line_status (self, param)
	393	*
6819bc2e	394	*
1da177e4 LT	395	*
1da177e4 LT	396	*/
6819bc2e	397	static int ircomm_param_line_status(void instance, irda_param_t param,
1da177e4 LT	398	int get)
1da177e4 LT	399	{
0dc47877	400	IRDA_DEBUG(2, "%s(), not impl.\n", __func__ );
1da177e4 LT	401
	402	return 0;
	403	}
	404
	405	/*
	406	* Function ircomm_param_dte (instance, param)
	407	*
	408	* If we get here, there must be some sort of null-modem connection, and
	409	* we are probably working in server mode as well.
	410	*/
	411	static int ircomm_param_dte(void instance, irda_param_t param, int get)
	412	{
	413	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	414	__u8 dte;
	415
	416	IRDA_ASSERT(self != NULL, return -1;);
	417	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	418
	419	if (get)
	420	param->pv.i = self->settings.dte;
	421	else {
	422	dte = (__u8) param->pv.i;
	423
	424	self->settings.dce = 0;
6819bc2e	425
1da177e4 LT	426	if (dte & IRCOMM_DELTA_DTR)
	427	self->settings.dce \|= (IRCOMM_DELTA_DSR\|
	428	IRCOMM_DELTA_RI \|
	429	IRCOMM_DELTA_CD);
	430	if (dte & IRCOMM_DTR)
	431	self->settings.dce \|= (IRCOMM_DSR\|
	432	IRCOMM_RI \|
	433	IRCOMM_CD);
6819bc2e	434
1da177e4 LT	435	if (dte & IRCOMM_DELTA_RTS)
	436	self->settings.dce \|= IRCOMM_DELTA_CTS;
	437	if (dte & IRCOMM_RTS)
	438	self->settings.dce \|= IRCOMM_CTS;
	439
	440	/* Take appropriate actions */
	441	ircomm_tty_check_modem_status(self);
	442
	443	/* Null modem cable emulator */
	444	self->settings.null_modem = TRUE;
	445	}
	446
	447	return 0;
	448	}
	449
	450	/*
	451	* Function ircomm_param_dce (instance, param)
	452	*
6819bc2e	453	*
1da177e4 LT	454	*
	455	*/
	456	static int ircomm_param_dce(void instance, irda_param_t param, int get)
	457	{
	458	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	459	__u8 dce;
	460
0dc47877	461	IRDA_DEBUG(1, "%s(), dce = 0x%02x\n", __func__ , (__u8) param->pv.i);
1da177e4 LT	462
	463	dce = (__u8) param->pv.i;
	464
	465	IRDA_ASSERT(self != NULL, return -1;);
	466	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	467
	468	self->settings.dce = dce;
	469
	470	/* Check if any of the settings have changed */
	471	if (dce & 0x0f) {
	472	if (dce & IRCOMM_DELTA_CTS) {
b1383380	473	IRDA_DEBUG(2, "%s(), CTS\n", __func__ );
1da177e4 LT	474	}
	475	}
	476
	477	ircomm_tty_check_modem_status(self);
	478
	479	return 0;
	480	}
	481
	482	/*
	483	* Function ircomm_param_poll (instance, param)
	484	*
	485	* Called when the peer device is polling for the line settings
	486	*
	487	*/
	488	static int ircomm_param_poll(void instance, irda_param_t param, int get)
	489	{
	490	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	491
	492	IRDA_ASSERT(self != NULL, return -1;);
	493	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	494
cc53ded2	495	/* Poll parameters are always of length 0 (just a signal) */
1da177e4 LT	496	if (!get) {
	497	/* Respond with DTE line settings */
	498	ircomm_param_request(self, IRCOMM_DTE, TRUE);
	499	}
	500	return 0;
	501	}
	502
	503
	504
	505
	506