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}
248