[net-next-2.6.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 <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/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)
{
	struct tty_struct *tty;
	unsigned long flags;
	struct sk_buff *skb;
	int count;

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

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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 = 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, skb_tailroom(skb),
				  &ircomm_param_info);
	if (count < 0) {
		IRDA_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;

	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", __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;

	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", __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;

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

	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", __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;

	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", __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;

	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", __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;

	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", __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;

	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", __FUNCTION__ , (__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", __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;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_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;
}
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 <dagb@cs.uit.no>
	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 <dagb@cs.uit.no>
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
1da177e4 LT	31	#include <linux/workqueue.h>
	32	#include <linux/interrupt.h>
	33
	34	#include <net/irda/irda.h>
	35	#include <net/irda/parameters.h>
	36
	37	#include <net/irda/ircomm_core.h>
	38	#include <net/irda/ircomm_tty_attach.h>
	39	#include <net/irda/ircomm_tty.h>
	40
	41	#include <net/irda/ircomm_param.h>
	42
6819bc2e	43	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4	44	int get);
6819bc2e	45	static int ircomm_param_port_type(void instance, irda_param_t param,
1da177e4	46	int get);
6819bc2e	47	static int ircomm_param_port_name(void instance, irda_param_t param,
1da177e4	48	int get);
6819bc2e	49	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4	50	int get);
6819bc2e	51	static int ircomm_param_data_rate(void instance, irda_param_t param,
1da177e4	52	int get);
6819bc2e	53	static int ircomm_param_data_format(void instance, irda_param_t param,
1da177e4	54	int get);
6819bc2e	55	static int ircomm_param_flow_control(void instance, irda_param_t param,
1da177e4 LT	56	int get);
	57	static int ircomm_param_xon_xoff(void instance, irda_param_t param, int get);
	58	static int ircomm_param_enq_ack(void instance, irda_param_t param, int get);
6819bc2e	59	static int ircomm_param_line_status(void instance, irda_param_t param,
1da177e4 LT	60	int get);
	61	static int ircomm_param_dte(void instance, irda_param_t param, int get);
	62	static int ircomm_param_dce(void instance, irda_param_t param, int get);
	63	static int ircomm_param_poll(void instance, irda_param_t param, int get);
	64
	65	static pi_minor_info_t pi_minor_call_table_common[] = {
	66	{ ircomm_param_service_type, PV_INT_8_BITS },
	67	{ ircomm_param_port_type, PV_INT_8_BITS },
	68	{ ircomm_param_port_name, PV_STRING }
	69	};
	70	static pi_minor_info_t pi_minor_call_table_non_raw[] = {
	71	{ ircomm_param_data_rate, PV_INT_32_BITS \| PV_BIG_ENDIAN },
	72	{ ircomm_param_data_format, PV_INT_8_BITS },
	73	{ ircomm_param_flow_control, PV_INT_8_BITS },
	74	{ ircomm_param_xon_xoff, PV_INT_16_BITS },
	75	{ ircomm_param_enq_ack, PV_INT_16_BITS },
	76	{ ircomm_param_line_status, PV_INT_8_BITS }
	77	};
	78	static pi_minor_info_t pi_minor_call_table_9_wire[] = {
	79	{ ircomm_param_dte, PV_INT_8_BITS },
	80	{ ircomm_param_dce, PV_INT_8_BITS },
	81	{ ircomm_param_poll, PV_NO_VALUE },
	82	};
	83
	84	static pi_major_info_t pi_major_call_table[] = {
	85	{ pi_minor_call_table_common, 3 },
	86	{ pi_minor_call_table_non_raw, 6 },
6819bc2e	87	{ pi_minor_call_table_9_wire, 3 }
1da177e4 LT	88	/* { pi_minor_call_table_centronics } */
	89	};
	90
	91	pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 };
	92
	93	/*
	94	* Function ircomm_param_request (self, pi, flush)
	95	*
	96	* Queue a parameter for the control channel
	97	*
	98	*/
	99	int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
	100	{
	101	struct tty_struct *tty;
	102	unsigned long flags;
	103	struct sk_buff *skb;
	104	int count;
	105
	106	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	107
	108	IRDA_ASSERT(self != NULL, return -1;);
	109	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	110
	111	tty = self->tty;
	112	if (!tty)
	113	return 0;
	114
	115	/* Make sure we don't send parameters for raw mode */
	116	if (self->service_type == IRCOMM_3_WIRE_RAW)
	117	return 0;
	118
	119	spin_lock_irqsave(&self->spinlock, flags);
	120
6819bc2e	121	skb = self->ctrl_skb;
1da177e4	122	if (!skb) {
485fb2c9	123	skb = alloc_skb(256, GFP_ATOMIC);
1da177e4 LT	124	if (!skb) {
	125	spin_unlock_irqrestore(&self->spinlock, flags);
	126	return -ENOMEM;
	127	}
6819bc2e	128
1da177e4 LT	129	skb_reserve(skb, self->max_header_size);
	130	self->ctrl_skb = skb;
	131	}
6819bc2e	132	/*
1da177e4	133	* Inserting is a little bit tricky since we don't know how much
6819bc2e	134	* room we will need. But this should hopefully work OK
1da177e4 LT	135	*/
	136	count = irda_param_insert(self, pi, skb->tail, skb_tailroom(skb),
	137	&ircomm_param_info);
	138	if (count < 0) {
	139	IRDA_WARNING("%s(), no room for parameter!\n", __FUNCTION__);
	140	spin_unlock_irqrestore(&self->spinlock, flags);
	141	return -1;
	142	}
	143	skb_put(skb, count);
	144
	145	spin_unlock_irqrestore(&self->spinlock, flags);
	146
	147	IRDA_DEBUG(2, "%s(), skb->len=%d\n", __FUNCTION__ , skb->len);
	148
	149	if (flush) {
	150	/* ircomm_tty_do_softint will take care of the rest */
	151	schedule_work(&self->tqueue);
	152	}
	153
	154	return count;
	155	}
	156
	157	/*
	158	* Function ircomm_param_service_type (self, buf, len)
	159	*
	160	* Handle service type, this function will both be called after the LM-IAS
	161	* query and then the remote device sends its initial parameters
	162	*
	163	*/
6819bc2e	164	static int ircomm_param_service_type(void instance, irda_param_t param,
1da177e4 LT	165	int get)
	166	{
	167	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	168	__u8 service_type = (__u8) param->pv.i;
	169
	170	IRDA_ASSERT(self != NULL, return -1;);
	171	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	172
	173	if (get) {
	174	param->pv.i = self->settings.service_type;
	175	return 0;
	176	}
	177
	178	/* Find all common service types */
	179	service_type &= self->service_type;
	180	if (!service_type) {
6819bc2e	181	IRDA_DEBUG(2,
1da177e4 LT	182	"%s(), No common service type to use!\n", __FUNCTION__ );
	183	return -1;
	184	}
	185	IRDA_DEBUG(0, "%s(), services in common=%02x\n", __FUNCTION__ ,
	186	service_type);
	187
	188	/*
	189	* Now choose a preferred service type of those available
	190	*/
	191	if (service_type & IRCOMM_CENTRONICS)
	192	self->settings.service_type = IRCOMM_CENTRONICS;
	193	else if (service_type & IRCOMM_9_WIRE)
	194	self->settings.service_type = IRCOMM_9_WIRE;
	195	else if (service_type & IRCOMM_3_WIRE)
	196	self->settings.service_type = IRCOMM_3_WIRE;
	197	else if (service_type & IRCOMM_3_WIRE_RAW)
	198	self->settings.service_type = IRCOMM_3_WIRE_RAW;
	199
6819bc2e	200	IRDA_DEBUG(0, "%s(), resulting service type=0x%02x\n", __FUNCTION__ ,
1da177e4 LT	201	self->settings.service_type);
1da177e4 LT	202
6819bc2e	203	/*
1da177e4	204	* Now the line is ready for some communication. Check if we are a
6819bc2e	205	* server, and send over some initial parameters.
1da177e4 LT	206	* Client do it in ircomm_tty_state_setup().
	207	* Note : we may get called from ircomm_tty_getvalue_confirm(),
	208	* therefore before we even have open any socket. And self->client
	209	* is initialised to TRUE only later. So, we check if the link is
	210	* really initialised. - Jean II
	211	*/
	212	if ((self->max_header_size != IRCOMM_TTY_HDR_UNINITIALISED) &&
	213	(!self->client) &&
	214	(self->settings.service_type != IRCOMM_3_WIRE_RAW))
	215	{
	216	/* Init connection */
	217	ircomm_tty_send_initial_parameters(self);
	218	ircomm_tty_link_established(self);
	219	}
	220
	221	return 0;
	222	}
	223
	224	/*
	225	* Function ircomm_param_port_type (self, param)
	226	*
	227	* The port type parameter tells if the devices are serial or parallel.
	228	* Since we only advertise serial service, this parameter should only
	229	* be equal to IRCOMM_SERIAL.
	230	*/
	231	static int ircomm_param_port_type(void instance, irda_param_t param, int get)
	232	{
	233	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	234
	235	IRDA_ASSERT(self != NULL, return -1;);
	236	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	237
1da177e4 LT	238	if (get)
	239	param->pv.i = IRCOMM_SERIAL;
	240	else {
	241	self->settings.port_type = (__u8) param->pv.i;
	242
6819bc2e	243	IRDA_DEBUG(0, "%s(), port type=%d\n", __FUNCTION__ ,
1da177e4 LT	244	self->settings.port_type);
	245	}
	246	return 0;
	247	}
	248
	249	/*
	250	* Function ircomm_param_port_name (self, param)
	251	*
	252	* Exchange port name
	253	*
	254	*/
	255	static int ircomm_param_port_name(void instance, irda_param_t param, int get)
	256	{
	257	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
6819bc2e	258
1da177e4 LT	259	IRDA_ASSERT(self != NULL, return -1;);
	260	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	261
	262	if (get) {
	263	IRDA_DEBUG(0, "%s(), not imp!\n", __FUNCTION__ );
	264	} else {
	265	IRDA_DEBUG(0, "%s(), port-name=%s\n", __FUNCTION__ , param->pv.c);
	266	strncpy(self->settings.port_name, param->pv.c, 32);
	267	}
	268
	269	return 0;
	270	}
	271
	272	/*
	273	* Function ircomm_param_data_rate (self, param)
	274	*
	275	* Exchange data rate to be used in this settings
	276	*
	277	*/
	278	static int ircomm_param_data_rate(void instance, irda_param_t param, int get)
	279	{
	280	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
6819bc2e	281
1da177e4 LT	282	IRDA_ASSERT(self != NULL, return -1;);
	283	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	284
	285	if (get)
	286	param->pv.i = self->settings.data_rate;
	287	else
	288	self->settings.data_rate = param->pv.i;
6819bc2e	289
1da177e4 LT	290	IRDA_DEBUG(2, "%s(), data rate = %d\n", __FUNCTION__ , param->pv.i);
	291
	292	return 0;
	293	}
	294
	295	/*
	296	* Function ircomm_param_data_format (self, param)
	297	*
	298	* Exchange data format to be used in this settings
	299	*
	300	*/
6819bc2e	301	static int ircomm_param_data_format(void instance, irda_param_t param,
1da177e4 LT	302	int get)
	303	{
	304	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	305
	306	IRDA_ASSERT(self != NULL, return -1;);
	307	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	308
	309	if (get)
	310	param->pv.i = self->settings.data_format;
	311	else
	312	self->settings.data_format = (__u8) param->pv.i;
6819bc2e	313
1da177e4 LT	314	return 0;
	315	}
	316
	317	/*
	318	* Function ircomm_param_flow_control (self, param)
	319	*
	320	* Exchange flow control settings to be used in this settings
	321	*
	322	*/
6819bc2e	323	static int ircomm_param_flow_control(void instance, irda_param_t param,
1da177e4 LT	324	int get)
	325	{
	326	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	327
	328	IRDA_ASSERT(self != NULL, return -1;);
	329	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	330
1da177e4 LT	331	if (get)
	332	param->pv.i = self->settings.flow_control;
	333	else
	334	self->settings.flow_control = (__u8) param->pv.i;
	335
	336	IRDA_DEBUG(1, "%s(), flow control = 0x%02x\n", __FUNCTION__ , (__u8) param->pv.i);
	337
	338	return 0;
	339	}
	340
	341	/*
	342	* Function ircomm_param_xon_xoff (self, param)
	343	*
	344	* Exchange XON/XOFF characters
	345	*
	346	*/
	347	static int ircomm_param_xon_xoff(void instance, irda_param_t param, int get)
	348	{
	349	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	350
	351	IRDA_ASSERT(self != NULL, return -1;);
	352	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	353
1da177e4 LT	354	if (get) {
	355	param->pv.i = self->settings.xonxoff[0];
	356	param->pv.i \|= self->settings.xonxoff[1] << 8;
	357	} else {
	358	self->settings.xonxoff[0] = (__u16) param->pv.i & 0xff;
	359	self->settings.xonxoff[1] = (__u16) param->pv.i >> 8;
	360	}
	361
6819bc2e	362	IRDA_DEBUG(0, "%s(), XON/XOFF = 0x%02x,0x%02x\n", __FUNCTION__ ,
1da177e4 LT	363	param->pv.i & 0xff, param->pv.i >> 8);
	364
	365	return 0;
	366	}
	367
	368	/*
	369	* Function ircomm_param_enq_ack (self, param)
	370	*
	371	* Exchange ENQ/ACK characters
	372	*
	373	*/
	374	static int ircomm_param_enq_ack(void instance, irda_param_t param, int get)
	375	{
	376	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	377
	378	IRDA_ASSERT(self != NULL, return -1;);
	379	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
6819bc2e	380
1da177e4 LT	381	if (get) {
	382	param->pv.i = self->settings.enqack[0];
	383	param->pv.i \|= self->settings.enqack[1] << 8;
	384	} else {
	385	self->settings.enqack[0] = (__u16) param->pv.i & 0xff;
	386	self->settings.enqack[1] = (__u16) param->pv.i >> 8;
	387	}
	388
	389	IRDA_DEBUG(0, "%s(), ENQ/ACK = 0x%02x,0x%02x\n", __FUNCTION__ ,
	390	param->pv.i & 0xff, param->pv.i >> 8);
	391
	392	return 0;
	393	}
	394
	395	/*
	396	* Function ircomm_param_line_status (self, param)
	397	*
6819bc2e	398	*
1da177e4 LT	399	*
1da177e4 LT	400	*/
6819bc2e	401	static int ircomm_param_line_status(void instance, irda_param_t param,
1da177e4 LT	402	int get)
	403	{
	404	IRDA_DEBUG(2, "%s(), not impl.\n", __FUNCTION__ );
	405
	406	return 0;
	407	}
	408
	409	/*
	410	* Function ircomm_param_dte (instance, param)
	411	*
	412	* If we get here, there must be some sort of null-modem connection, and
	413	* we are probably working in server mode as well.
	414	*/
	415	static int ircomm_param_dte(void instance, irda_param_t param, int get)
	416	{
	417	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	418	__u8 dte;
	419
	420	IRDA_ASSERT(self != NULL, return -1;);
	421	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	422
	423	if (get)
	424	param->pv.i = self->settings.dte;
	425	else {
	426	dte = (__u8) param->pv.i;
	427
	428	self->settings.dce = 0;
6819bc2e	429
1da177e4 LT	430	if (dte & IRCOMM_DELTA_DTR)
	431	self->settings.dce \|= (IRCOMM_DELTA_DSR\|
	432	IRCOMM_DELTA_RI \|
	433	IRCOMM_DELTA_CD);
	434	if (dte & IRCOMM_DTR)
	435	self->settings.dce \|= (IRCOMM_DSR\|
	436	IRCOMM_RI \|
	437	IRCOMM_CD);
6819bc2e	438
1da177e4 LT	439	if (dte & IRCOMM_DELTA_RTS)
	440	self->settings.dce \|= IRCOMM_DELTA_CTS;
	441	if (dte & IRCOMM_RTS)
	442	self->settings.dce \|= IRCOMM_CTS;
	443
	444	/* Take appropriate actions */
	445	ircomm_tty_check_modem_status(self);
	446
	447	/* Null modem cable emulator */
	448	self->settings.null_modem = TRUE;
	449	}
	450
	451	return 0;
	452	}
	453
	454	/*
	455	* Function ircomm_param_dce (instance, param)
	456	*
6819bc2e	457	*
1da177e4 LT	458	*
	459	*/
	460	static int ircomm_param_dce(void instance, irda_param_t param, int get)
	461	{
	462	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	463	__u8 dce;
	464
	465	IRDA_DEBUG(1, "%s(), dce = 0x%02x\n", __FUNCTION__ , (__u8) param->pv.i);
	466
	467	dce = (__u8) param->pv.i;
	468
	469	IRDA_ASSERT(self != NULL, return -1;);
	470	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	471
	472	self->settings.dce = dce;
	473
	474	/* Check if any of the settings have changed */
	475	if (dce & 0x0f) {
	476	if (dce & IRCOMM_DELTA_CTS) {
	477	IRDA_DEBUG(2, "%s(), CTS \n", __FUNCTION__ );
	478	}
	479	}
	480
	481	ircomm_tty_check_modem_status(self);
	482
	483	return 0;
	484	}
	485
	486	/*
	487	* Function ircomm_param_poll (instance, param)
	488	*
	489	* Called when the peer device is polling for the line settings
	490	*
	491	*/
	492	static int ircomm_param_poll(void instance, irda_param_t param, int get)
	493	{
	494	struct ircomm_tty_cb self = (struct ircomm_tty_cb ) instance;
	495
	496	IRDA_ASSERT(self != NULL, return -1;);
	497	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
	498
	499	/* Poll parameters are always of lenght 0 (just a signal) */
	500	if (!get) {
	501	/* Respond with DTE line settings */
	502	ircomm_param_request(self, IRCOMM_DTE, TRUE);
	503	}
	504	return 0;
	505	}
	506
	507
	508
	509
	510