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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}