aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/isdn/sc/interrupt.c
blob: f0225bc0f2670ce2f0fde9b5d276f26151c6a046 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/* $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>

/*
 * 
 */
irqreturn_t interrupt_handler(int dummy, void *card_inst)
{

	RspMessage rcvmsg;
	int channel;
	int card = (int)(unsigned long) card_inst;

	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%lx\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)
			{
				int len;

				pr_debug("%s: Got Incoming Call\n",
						sc_adapter[card]->devicename);
				len = strlcpy(setup.phone, &(rcvmsg.msg_data.byte_array[4]),
						sizeof(setup.phone));
				if (len >= sizeof(setup.phone))
					continue;
				len = strlcpy(setup.eazmsn,
						sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
						sizeof(setup.eazmsn));
				if (len >= sizeof(setup.eazmsn))
					continue;
				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)){
			strlcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
				rcvmsg.msg_data.byte_array,
				sizeof(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;
}