drivers/isdn/sc/interrupt.c - third_party/linux - Git at Google

 /* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
  *
  * Copyright (C) 1996  SpellCaster Telecommunications Inc.
  *
  * This software may be used and distributed according to the terms
  * of the GNU General Public License, incorporated herein by reference.
  *
  * For more information, please contact gpl-info@spellcast.com or write:
  *
  *     SpellCaster Telecommunications Inc.
  *     5621 Finch Avenue East, Unit #3
  *     Scarborough, Ontario  Canada
  *     M1B 2T9
  *     +1 (416) 297-8565
  *     +1 (416) 297-6433 Facsimile
  */

 #include "includes.h"
 #include "hardware.h"
 #include "message.h"
 #include "card.h"
 #include <linux/interrupt.h>

 extern int indicate_status(int, int, ulong, char *);
 extern void check_phystat(unsigned long);
 extern int receivemessage(int, RspMessage *);
 extern int sendmessage(int, unsigned int, unsigned int, unsigned int,
         unsigned int, unsigned int, unsigned int, unsigned int *);
 extern void rcvpkt(int, RspMessage *);

 extern int cinst;
 extern board *sc_adapter[];

 int get_card_from_irq(int irq)
 {
 	int i;

 	for(i = 0 ; i < cinst ; i++) {
 		if(sc_adapter[i]->interrupt == irq)
 			return i;
 	}
 	return -1;
 }

 /*
  *
  */
 irqreturn_t interrupt_handler(int interrupt, void *cardptr, struct pt_regs *regs)
 {

 	RspMessage rcvmsg;
 	int channel;
 	int card;

 	card = get_card_from_irq(interrupt);

 	if(!IS_VALID_CARD(card)) {
 		pr_debug("Invalid param: %d is not a valid card id\n", card);
 		return IRQ_NONE;
 	}

 	pr_debug("%s: Entered Interrupt handler\n",
 			sc_adapter[card]->devicename);

  	/*
 	 * Pull all of the waiting messages off the response queue
 	 */
 	while (!receivemessage(card, &rcvmsg)) {
 		/*
 		 * Push the message to the adapter structure for
 		 * send_and_receive to snoop
 		 */
 		if(sc_adapter[card]->want_async_messages)
 			memcpy(&(sc_adapter[card]->async_msg),
 					&rcvmsg, sizeof(RspMessage));

 		channel = (unsigned int) rcvmsg.phy_link_no;

 		/*
 		 * Trap Invalid request messages
 		 */
 		if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
 			pr_debug("%s: Invalid request Message, rsp_status = %d\n",
 				sc_adapter[card]->devicename,
 				rcvmsg.rsp_status);
 			break;
 		}

 		/*
 		 * Check for a linkRead message
 		 */
 		if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
 		{
 			pr_debug("%s: Received packet 0x%x bytes long at 0x%x\n",
 						sc_adapter[card]->devicename,
 						rcvmsg.msg_data.response.msg_len,
 						rcvmsg.msg_data.response.buff_offset);
 			rcvpkt(card, &rcvmsg);
 			continue;

 		}

 		/*
 		 * Handle a write acknoledgement
 		 */
 		if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
 			pr_debug("%s: Packet Send ACK on channel %d\n",
 				sc_adapter[card]->devicename,
 				rcvmsg.phy_link_no);
 			sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++;
 			continue;
 		}

 		/*
 		 * Handle a connection message
 		 */
 		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
 		{
 			unsigned int callid;
 			setup_parm setup;
 			pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
 						sc_adapter[card]->devicename,
 						rcvmsg.phy_link_no,
 						rcvmsg.rsp_status,
 						rcvmsg.msg_data.byte_array[2]);

 			memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int));
 			if(callid>=0x8000 && callid<=0xFFFF)
 			{
 				pr_debug("%s: Got Dial-Out Rsp\n",
 					sc_adapter[card]->devicename);
 				indicate_status(card, ISDN_STAT_DCONN,
 						(unsigned long)rcvmsg.phy_link_no-1,NULL);

 			}
 			else if(callid>=0x0000 && callid<=0x7FFF)
 			{
 				pr_debug("%s: Got Incoming Call\n",
 						sc_adapter[card]->devicename);
 				strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
 				strcpy(setup.eazmsn,
 					sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
 				setup.si1 = 7;
 				setup.si2 = 0;
 				setup.plan = 0;
 				setup.screen = 0;

 				indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
 				indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 			}
 			continue;
 		}

 		/*
 		 * Handle a disconnection message
 		 */
 		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
 		{
 			pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
 						sc_adapter[card]->devicename,
 						rcvmsg.phy_link_no,
 						rcvmsg.rsp_status,
 					 	rcvmsg.msg_data.byte_array[2]);

 			indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 			indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 			continue;

 		}

 		/*
 		 * Handle a startProc engine up message
 		 */
 		if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
 			pr_debug("%s: Received EngineUp message\n",
 				sc_adapter[card]->devicename);
 			sc_adapter[card]->EngineUp = 1;
 			sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
 			sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
 			init_timer(&sc_adapter[card]->stat_timer);
 			sc_adapter[card]->stat_timer.function = check_phystat;
 			sc_adapter[card]->stat_timer.data = card;
 			sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
 			add_timer(&sc_adapter[card]->stat_timer);
 			continue;
 		}

 		/*
 		 * Start proc response
 		 */
 		if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
 			pr_debug("%s: StartProc Response Status %d\n",
 				sc_adapter[card]->devicename,
 				rcvmsg.rsp_status);
 			continue;
 		}

 		/*
 		 * Handle a GetMyNumber Rsp
 		 */
 		if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
 			strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
 			continue;
 		}

 		/*
 		 * PhyStatus response
 		 */
 		if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
 			unsigned int b1stat, b2stat;

 			/*
 			 * Covert the message data to the adapter->phystat code
 			 */
 			b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
 			b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];

 			sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
 			pr_debug("%s: PhyStat is 0x%2x\n",
 				sc_adapter[card]->devicename,
 				sc_adapter[card]->nphystat);
 			continue;
 		}


 		/*
 		 * Handle a GetFramFormat
 		 */
 		if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
 			if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
 				unsigned int proto = HDLC_PROTO;
 				/*
 				 * Set board format to HDLC if it wasn't already
 				 */
 				pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
 						sc_adapter[card]->devicename,
 					rcvmsg.msg_data.byte_array[0]);
 				sendmessage(card, CEPID, ceReqTypeCall,
 						ceReqClass0,
 						ceReqCallSetFrameFormat,
 						(unsigned char) channel +1,
 						1,&proto);
 				}
 			continue;
 		}

 		/*
 		 * Hmm...
 		 */
 		pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
 			sc_adapter[card]->devicename,
 			rcvmsg.type, rcvmsg.class, rcvmsg.code,
 			rcvmsg.phy_link_no);

 	}	/* while */

 	pr_debug("%s: Exiting Interrupt Handler\n",
 			sc_adapter[card]->devicename);
 	return IRQ_HANDLED;
 }
	/* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
	*
	* Copyright (C) 1996 SpellCaster Telecommunications Inc.
	*
	* This software may be used and distributed according to the terms
	* of the GNU General Public License, incorporated herein by reference.
	*
	* For more information, please contact gpl-info@spellcast.com or write:
	*
	* SpellCaster Telecommunications Inc.
	* 5621 Finch Avenue East, Unit #3
	* Scarborough, Ontario Canada
	* M1B 2T9
	* +1 (416) 297-8565
	* +1 (416) 297-6433 Facsimile
	*/

	#include "includes.h"
	#include "hardware.h"
	#include "message.h"
	#include "card.h"
	#include <linux/interrupt.h>

	extern int indicate_status(int, int, ulong, char *);
	extern void check_phystat(unsigned long);
	extern int receivemessage(int, RspMessage *);
	extern int sendmessage(int, unsigned int, unsigned int, unsigned int,
	unsigned int, unsigned int, unsigned int, unsigned int *);
	extern void rcvpkt(int, RspMessage *);

	extern int cinst;
	extern board *sc_adapter[];

	int get_card_from_irq(int irq)
	{
	int i;

	for(i = 0 ; i < cinst ; i++) {
	if(sc_adapter[i]->interrupt == irq)
	return i;
	}
	return -1;
	}

	/*
	*
	*/
	irqreturn_t interrupt_handler(int interrupt, void cardptr, struct pt_regs regs)
	{

	RspMessage rcvmsg;
	int channel;
	int card;

	card = get_card_from_irq(interrupt);

	if(!IS_VALID_CARD(card)) {
	pr_debug("Invalid param: %d is not a valid card id\n", card);
	return IRQ_NONE;
	}

	pr_debug("%s: Entered Interrupt handler\n",
	sc_adapter[card]->devicename);

	/*
	* Pull all of the waiting messages off the response queue
	*/
	while (!receivemessage(card, &rcvmsg)) {
	/*
	* Push the message to the adapter structure for
	* send_and_receive to snoop
	*/
	if(sc_adapter[card]->want_async_messages)
	memcpy(&(sc_adapter[card]->async_msg),
	&rcvmsg, sizeof(RspMessage));

	channel = (unsigned int) rcvmsg.phy_link_no;

	/*
	* Trap Invalid request messages
	*/
	if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
	pr_debug("%s: Invalid request Message, rsp_status = %d\n",
	sc_adapter[card]->devicename,
	rcvmsg.rsp_status);
	break;
	}

	/*
	* Check for a linkRead message
	*/
	if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
	{
	pr_debug("%s: Received packet 0x%x bytes long at 0x%x\n",
	sc_adapter[card]->devicename,
	rcvmsg.msg_data.response.msg_len,
	rcvmsg.msg_data.response.buff_offset);
	rcvpkt(card, &rcvmsg);
	continue;

	}

	/*
	* Handle a write acknoledgement
	*/
	if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
	pr_debug("%s: Packet Send ACK on channel %d\n",
	sc_adapter[card]->devicename,
	rcvmsg.phy_link_no);
	sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++;
	continue;
	}

	/*
	* Handle a connection message
	*/
	if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
	{
	unsigned int callid;
	setup_parm setup;
	pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
	sc_adapter[card]->devicename,
	rcvmsg.phy_link_no,
	rcvmsg.rsp_status,
	rcvmsg.msg_data.byte_array[2]);

	memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int));
	if(callid>=0x8000 && callid<=0xFFFF)
	{
	pr_debug("%s: Got Dial-Out Rsp\n",
	sc_adapter[card]->devicename);
	indicate_status(card, ISDN_STAT_DCONN,
	(unsigned long)rcvmsg.phy_link_no-1,NULL);

	}
	else if(callid>=0x0000 && callid<=0x7FFF)
	{
	pr_debug("%s: Got Incoming Call\n",
	sc_adapter[card]->devicename);
	strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
	strcpy(setup.eazmsn,
	sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
	setup.si1 = 7;
	setup.si2 = 0;
	setup.plan = 0;
	setup.screen = 0;

	indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
	indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
	}
	continue;
	}

	/*
	* Handle a disconnection message
	*/
	if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
	{
	pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
	sc_adapter[card]->devicename,
	rcvmsg.phy_link_no,
	rcvmsg.rsp_status,
	rcvmsg.msg_data.byte_array[2]);

	indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
	indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
	continue;

	}

	/*
	* Handle a startProc engine up message
	*/
	if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
	pr_debug("%s: Received EngineUp message\n",
	sc_adapter[card]->devicename);
	sc_adapter[card]->EngineUp = 1;
	sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
	sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
	init_timer(&sc_adapter[card]->stat_timer);
	sc_adapter[card]->stat_timer.function = check_phystat;
	sc_adapter[card]->stat_timer.data = card;
	sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
	add_timer(&sc_adapter[card]->stat_timer);
	continue;
	}

	/*
	* Start proc response
	*/
	if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
	pr_debug("%s: StartProc Response Status %d\n",
	sc_adapter[card]->devicename,
	rcvmsg.rsp_status);
	continue;
	}

	/*
	* Handle a GetMyNumber Rsp
	*/
	if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
	strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
	continue;
	}

	/*
	* PhyStatus response
	*/
	if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
	unsigned int b1stat, b2stat;

	/*
	* Covert the message data to the adapter->phystat code
	*/
	b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
	b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];

	sc_adapter[card]->nphystat = (b2stat >> 8) \| b1stat; /* endian?? */
	pr_debug("%s: PhyStat is 0x%2x\n",
	sc_adapter[card]->devicename,
	sc_adapter[card]->nphystat);
	continue;
	}


	/*
	* Handle a GetFramFormat
	*/
	if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
	if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
	unsigned int proto = HDLC_PROTO;
	/*
	* Set board format to HDLC if it wasn't already
	*/
	pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
	sc_adapter[card]->devicename,
	rcvmsg.msg_data.byte_array[0]);
	sendmessage(card, CEPID, ceReqTypeCall,
	ceReqClass0,
	ceReqCallSetFrameFormat,
	(unsigned char) channel +1,
	1,&proto);
	}
	continue;
	}

	/*
	* Hmm...
	*/
	pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
	sc_adapter[card]->devicename,
	rcvmsg.type, rcvmsg.class, rcvmsg.code,
	rcvmsg.phy_link_no);

	} /* while */

	pr_debug("%s: Exiting Interrupt Handler\n",
	sc_adapter[card]->devicename);
	return IRQ_HANDLED;
	}