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/drivers/isdn/sc/interrupt.c

http://github.com/mirrors/linux
C | 247 lines | 152 code | 30 blank | 65 comment | 22 complexity | ea48bb8ac6b1aa5ce8f736fd055cf7aa MD5 | raw file
  1/* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
  2 *
  3 * Copyright (C) 1996  SpellCaster Telecommunications Inc.
  4 *
  5 * This software may be used and distributed according to the terms
  6 * of the GNU General Public License, incorporated herein by reference.
  7 *
  8 * For more information, please contact gpl-info@spellcast.com or write:
  9 *
 10 *     SpellCaster Telecommunications Inc.
 11 *     5621 Finch Avenue East, Unit #3
 12 *     Scarborough, Ontario  Canada
 13 *     M1B 2T9
 14 *     +1 (416) 297-8565
 15 *     +1 (416) 297-6433 Facsimile
 16 */
 17
 18#include "includes.h"
 19#include "hardware.h"
 20#include "message.h"
 21#include "card.h"
 22#include <linux/interrupt.h>
 23
 24/*
 25 *
 26 */
 27irqreturn_t interrupt_handler(int dummy, void *card_inst)
 28{
 29
 30	RspMessage rcvmsg;
 31	int channel;
 32	int card = (int)(unsigned long) card_inst;
 33
 34	if (!IS_VALID_CARD(card)) {
 35		pr_debug("Invalid param: %d is not a valid card id\n", card);
 36		return IRQ_NONE;
 37	}
 38
 39	pr_debug("%s: Entered Interrupt handler\n",
 40		 sc_adapter[card]->devicename);
 41
 42	/*
 43	 * Pull all of the waiting messages off the response queue
 44	 */
 45	while (!receivemessage(card, &rcvmsg)) {
 46		/*
 47		 * Push the message to the adapter structure for
 48		 * send_and_receive to snoop
 49		 */
 50		if (sc_adapter[card]->want_async_messages)
 51			memcpy(&(sc_adapter[card]->async_msg),
 52			       &rcvmsg, sizeof(RspMessage));
 53
 54		channel = (unsigned int) rcvmsg.phy_link_no;
 55
 56		/*
 57		 * Trap Invalid request messages
 58		 */
 59		if (IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
 60			pr_debug("%s: Invalid request Message, rsp_status = %d\n",
 61				 sc_adapter[card]->devicename,
 62				 rcvmsg.rsp_status);
 63			break;
 64		}
 65
 66		/*
 67		 * Check for a linkRead message
 68		 */
 69		if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
 70		{
 71			pr_debug("%s: Received packet 0x%x bytes long at 0x%lx\n",
 72				 sc_adapter[card]->devicename,
 73				 rcvmsg.msg_data.response.msg_len,
 74				 rcvmsg.msg_data.response.buff_offset);
 75			rcvpkt(card, &rcvmsg);
 76			continue;
 77
 78		}
 79
 80		/*
 81		 * Handle a write acknoledgement
 82		 */
 83		if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
 84			pr_debug("%s: Packet Send ACK on channel %d\n",
 85				 sc_adapter[card]->devicename,
 86				 rcvmsg.phy_link_no);
 87			sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].free_sendbufs++;
 88			continue;
 89		}
 90
 91		/*
 92		 * Handle a connection message
 93		 */
 94		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
 95		{
 96			unsigned int callid;
 97			setup_parm setup;
 98			pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
 99				 sc_adapter[card]->devicename,
100				 rcvmsg.phy_link_no,
101				 rcvmsg.rsp_status,
102				 rcvmsg.msg_data.byte_array[2]);
103
104			memcpy(&callid, rcvmsg.msg_data.byte_array, sizeof(int));
105			if (callid >= 0x8000 && callid <= 0xFFFF)
106			{
107				pr_debug("%s: Got Dial-Out Rsp\n",
108					 sc_adapter[card]->devicename);
109				indicate_status(card, ISDN_STAT_DCONN,
110						(unsigned long)rcvmsg.phy_link_no - 1, NULL);
111
112			}
113			else if (callid >= 0x0000 && callid <= 0x7FFF)
114			{
115				int len;
116
117				pr_debug("%s: Got Incoming Call\n",
118					 sc_adapter[card]->devicename);
119				len = strlcpy(setup.phone, &(rcvmsg.msg_data.byte_array[4]),
120					      sizeof(setup.phone));
121				if (len >= sizeof(setup.phone))
122					continue;
123				len = strlcpy(setup.eazmsn,
124					      sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
125					      sizeof(setup.eazmsn));
126				if (len >= sizeof(setup.eazmsn))
127					continue;
128				setup.si1 = 7;
129				setup.si2 = 0;
130				setup.plan = 0;
131				setup.screen = 0;
132
133				indicate_status(card, ISDN_STAT_ICALL, (unsigned long)rcvmsg.phy_link_no - 1, (char *)&setup);
134				indicate_status(card, ISDN_STAT_DCONN, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
135			}
136			continue;
137		}
138
139		/*
140		 * Handle a disconnection message
141		 */
142		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
143		{
144			pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
145				 sc_adapter[card]->devicename,
146				 rcvmsg.phy_link_no,
147				 rcvmsg.rsp_status,
148				 rcvmsg.msg_data.byte_array[2]);
149
150			indicate_status(card, ISDN_STAT_BHUP, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
151			indicate_status(card, ISDN_STAT_DHUP, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
152			continue;
153
154		}
155
156		/*
157		 * Handle a startProc engine up message
158		 */
159		if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
160			pr_debug("%s: Received EngineUp message\n",
161				 sc_adapter[card]->devicename);
162			sc_adapter[card]->EngineUp = 1;
163			sendmessage(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetMyNumber, 1, 0, NULL);
164			sendmessage(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetMyNumber, 2, 0, NULL);
165			init_timer(&sc_adapter[card]->stat_timer);
166			sc_adapter[card]->stat_timer.function = check_phystat;
167			sc_adapter[card]->stat_timer.data = card;
168			sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
169			add_timer(&sc_adapter[card]->stat_timer);
170			continue;
171		}
172
173		/*
174		 * Start proc response
175		 */
176		if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
177			pr_debug("%s: StartProc Response Status %d\n",
178				 sc_adapter[card]->devicename,
179				 rcvmsg.rsp_status);
180			continue;
181		}
182
183		/*
184		 * Handle a GetMyNumber Rsp
185		 */
186		if (IS_CE_MESSAGE(rcvmsg, Call, 0, GetMyNumber)) {
187			strlcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
188				rcvmsg.msg_data.byte_array,
189				sizeof(rcvmsg.msg_data.byte_array));
190			continue;
191		}
192
193		/*
194		 * PhyStatus response
195		 */
196		if (IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
197			unsigned int b1stat, b2stat;
198
199			/*
200			 * Covert the message data to the adapter->phystat code
201			 */
202			b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
203			b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
204
205			sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
206			pr_debug("%s: PhyStat is 0x%2x\n",
207				 sc_adapter[card]->devicename,
208				 sc_adapter[card]->nphystat);
209			continue;
210		}
211
212
213		/*
214		 * Handle a GetFramFormat
215		 */
216		if (IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
217			if (rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
218				unsigned int proto = HDLC_PROTO;
219				/*
220				 * Set board format to HDLC if it wasn't already
221				 */
222				pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
223					 sc_adapter[card]->devicename,
224					 rcvmsg.msg_data.byte_array[0]);
225				sendmessage(card, CEPID, ceReqTypeCall,
226					    ceReqClass0,
227					    ceReqCallSetFrameFormat,
228					    (unsigned char)channel + 1,
229					    1, &proto);
230			}
231			continue;
232		}
233
234		/*
235		 * Hmm...
236		 */
237		pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
238			 sc_adapter[card]->devicename,
239			 rcvmsg.type, rcvmsg.class, rcvmsg.code,
240			 rcvmsg.phy_link_no);
241
242	}	/* while */
243
244	pr_debug("%s: Exiting Interrupt Handler\n",
245		 sc_adapter[card]->devicename);
246	return IRQ_HANDLED;
247}