path: root/drivers/isdn/act2000/capi.c

/* $Id: capi.c,v 1.9.6.2 2001/09/23 22:24:32 kai Exp $
 *
 * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000.
 * CAPI encoder/decoder
 *
 * Author       Fritz Elfert
 * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * Thanks to Friedemann Baitinger and IBM Germany
 *
 */

#include "act2000.h"
#include "capi.h"

static actcapi_msgdsc valid_msg[] = {
	{{ 0x86, 0x02}, "DATA_B3_IND"},       /* DATA_B3_IND/CONF must be first because of speed!!! */
	{{ 0x86, 0x01}, "DATA_B3_CONF"},
	{{ 0x02, 0x01}, "CONNECT_CONF"},
	{{ 0x02, 0x02}, "CONNECT_IND"},
	{{ 0x09, 0x01}, "CONNECT_INFO_CONF"},
	{{ 0x03, 0x02}, "CONNECT_ACTIVE_IND"},
	{{ 0x04, 0x01}, "DISCONNECT_CONF"},
	{{ 0x04, 0x02}, "DISCONNECT_IND"},
	{{ 0x05, 0x01}, "LISTEN_CONF"},
	{{ 0x06, 0x01}, "GET_PARAMS_CONF"},
	{{ 0x07, 0x01}, "INFO_CONF"},
	{{ 0x07, 0x02}, "INFO_IND"},
	{{ 0x08, 0x01}, "DATA_CONF"},
	{{ 0x08, 0x02}, "DATA_IND"},
	{{ 0x40, 0x01}, "SELECT_B2_PROTOCOL_CONF"},
	{{ 0x80, 0x01}, "SELECT_B3_PROTOCOL_CONF"},
	{{ 0x81, 0x01}, "LISTEN_B3_CONF"},
	{{ 0x82, 0x01}, "CONNECT_B3_CONF"},
	{{ 0x82, 0x02}, "CONNECT_B3_IND"},
	{{ 0x83, 0x02}, "CONNECT_B3_ACTIVE_IND"},
	{{ 0x84, 0x01}, "DISCONNECT_B3_CONF"},
	{{ 0x84, 0x02}, "DISCONNECT_B3_IND"},
	{{ 0x85, 0x01}, "GET_B3_PARAMS_CONF"},
	{{ 0x01, 0x01}, "RESET_B3_CONF"},
	{{ 0x01, 0x02}, "RESET_B3_IND"},
	/* {{ 0x87, 0x02, "HANDSET_IND"}, not implemented */
	{{ 0xff, 0x01}, "MANUFACTURER_CONF"},
	{{ 0xff, 0x02}, "MANUFACTURER_IND"},
#ifdef DEBUG_MSG
	/* Requests */
	{{ 0x01, 0x00}, "RESET_B3_REQ"},
	{{ 0x02, 0x00}, "CONNECT_REQ"},
	{{ 0x04, 0x00}, "DISCONNECT_REQ"},
	{{ 0x05, 0x00}, "LISTEN_REQ"},
	{{ 0x06, 0x00}, "GET_PARAMS_REQ"},
	{{ 0x07, 0x00}, "INFO_REQ"},
	{{ 0x08, 0x00}, "DATA_REQ"},
	{{ 0x09, 0x00}, "CONNECT_INFO_REQ"},
	{{ 0x40, 0x00}, "SELECT_B2_PROTOCOL_REQ"},
	{{ 0x80, 0x00}, "SELECT_B3_PROTOCOL_REQ"},
	{{ 0x81, 0x00}, "LISTEN_B3_REQ"},
	{{ 0x82, 0x00}, "CONNECT_B3_REQ"},
	{{ 0x84, 0x00}, "DISCONNECT_B3_REQ"},
	{{ 0x85, 0x00}, "GET_B3_PARAMS_REQ"},
	{{ 0x86, 0x00}, "DATA_B3_REQ"},
	{{ 0xff, 0x00}, "MANUFACTURER_REQ"},
	/* Responses */
	{{ 0x01, 0x03}, "RESET_B3_RESP"},
	{{ 0x02, 0x03}, "CONNECT_RESP"},
	{{ 0x03, 0x03}, "CONNECT_ACTIVE_RESP"},
	{{ 0x04, 0x03}, "DISCONNECT_RESP"},
	{{ 0x07, 0x03}, "INFO_RESP"},
	{{ 0x08, 0x03}, "DATA_RESP"},
	{{ 0x82, 0x03}, "CONNECT_B3_RESP"},
	{{ 0x83, 0x03}, "CONNECT_B3_ACTIVE_RESP"},
	{{ 0x84, 0x03}, "DISCONNECT_B3_RESP"},
	{{ 0x86, 0x03}, "DATA_B3_RESP"},
	{{ 0xff, 0x03}, "MANUFACTURER_RESP"},
#endif
	{{ 0x00, 0x00}, NULL},
};
#define num_valid_imsg 27 /* MANUFACTURER_IND */

/*
 * Check for a valid incoming CAPI message.
 * Return:
 *   0 = Invalid message
 *   1 = Valid message, no B-Channel-data
 *   2 = Valid message, B-Channel-data
 */
int
actcapi_chkhdr(act2000_card *card, actcapi_msghdr *hdr)
{
	int i;

	if (hdr->applicationID != 1)
		return 0;
	if (hdr->len < 9)
		return 0;
	for (i = 0; i < num_valid_imsg; i++)
		if ((hdr->cmd.cmd == valid_msg[i].cmd.cmd) &&
		    (hdr->cmd.subcmd == valid_msg[i].cmd.subcmd)) {
			return (i ? 1 : 2);
		}
	return 0;
}

#define ACTCAPI_MKHDR(l, c, s) {				\
		skb = alloc_skb(l + 8, GFP_ATOMIC);		\
		if (skb) {					\
			m = (actcapi_msg *)skb_put(skb, l + 8); \
			m->hdr.len = l + 8;			\
			m->hdr.applicationID = 1;		\
			m->hdr.cmd.cmd = c;			\
			m->hdr.cmd.subcmd = s;			\
			m->hdr.msgnum = actcapi_nextsmsg(card); \
		} else m = NULL;				\
	}

#define ACTCAPI_CHKSKB if (!skb) {					\
		printk(KERN_WARNING "actcapi: alloc_skb failed\n");	\
		return;							\
	}

#define ACTCAPI_QUEUE_TX {				\
		actcapi_debug_msg(skb, 1);		\
		skb_queue_tail(&card->sndq, skb);	\
		act2000_schedule_tx(card);		\
	}

int
actcapi_listen_req(act2000_card *card)
{
	__u16 eazmask = 0;
	int i;
	actcapi_msg *m;
	struct sk_buff *skb;

	for (i = 0; i < ACT2000_BCH; i++)
		eazmask |= card->bch[i].eazmask;
	ACTCAPI_MKHDR(9, 0x05, 0x00);
	if (!skb) {
		printk(KERN_WARNING "actcapi: alloc_skb failed\n");
		return -ENOMEM;
	}
	m->msg