Merge git://git.infradead.org/iommu-2.6
[linux-2.6] / drivers / isdn / sc / interrupt.c
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  */
27 irqreturn_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                                 pr_debug("%s: Got Incoming Call\n",
116                                                 sc_adapter[card]->devicename);
117                                 strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
118                                 strcpy(setup.eazmsn,
119                                         sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
120                                 setup.si1 = 7;
121                                 setup.si2 = 0;
122                                 setup.plan = 0;
123                                 setup.screen = 0;
124
125                                 indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
126                                 indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
127                         }
128                         continue;
129                 }
130
131                 /*
132                  * Handle a disconnection message
133                  */
134                 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect)) 
135                 {
136                         pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
137                                                 sc_adapter[card]->devicename,
138                                                 rcvmsg.phy_link_no,
139                                                 rcvmsg.rsp_status,
140                                                 rcvmsg.msg_data.byte_array[2]);
141
142                         indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
143                         indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
144                         continue;
145
146                 }
147
148                 /*
149                  * Handle a startProc engine up message
150                  */
151                 if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
152                         pr_debug("%s: Received EngineUp message\n",
153                                 sc_adapter[card]->devicename);
154                         sc_adapter[card]->EngineUp = 1;
155                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
156                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
157                         init_timer(&sc_adapter[card]->stat_timer);
158                         sc_adapter[card]->stat_timer.function = check_phystat;
159                         sc_adapter[card]->stat_timer.data = card;
160                         sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
161                         add_timer(&sc_adapter[card]->stat_timer);
162                         continue;
163                 }
164
165                 /*
166                  * Start proc response
167                  */
168                 if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
169                         pr_debug("%s: StartProc Response Status %d\n",
170                                 sc_adapter[card]->devicename,
171                                 rcvmsg.rsp_status);
172                         continue;
173                 }
174
175                 /*
176                  * Handle a GetMyNumber Rsp
177                  */
178                 if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
179                         strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
180                         continue;
181                 }
182                         
183                 /*
184                  * PhyStatus response
185                  */
186                 if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
187                         unsigned int b1stat, b2stat;
188
189                         /*
190                          * Covert the message data to the adapter->phystat code
191                          */
192                         b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
193                         b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
194
195                         sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
196                         pr_debug("%s: PhyStat is 0x%2x\n",
197                                 sc_adapter[card]->devicename,
198                                 sc_adapter[card]->nphystat);
199                         continue;
200                 }
201
202
203                 /* 
204                  * Handle a GetFramFormat
205                  */
206                 if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
207                         if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
208                                 unsigned int proto = HDLC_PROTO;
209                                 /*
210                                  * Set board format to HDLC if it wasn't already
211                                  */
212                                 pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
213                                                 sc_adapter[card]->devicename,
214                                         rcvmsg.msg_data.byte_array[0]);
215                                 sendmessage(card, CEPID, ceReqTypeCall,
216                                                 ceReqClass0,
217                                                 ceReqCallSetFrameFormat,
218                                                 (unsigned char) channel +1,
219                                                 1,&proto);
220                                 }
221                         continue;
222                 }
223
224                 /*
225                  * Hmm...
226                  */
227                 pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
228                         sc_adapter[card]->devicename,
229                         rcvmsg.type, rcvmsg.class, rcvmsg.code,
230                         rcvmsg.phy_link_no);
231
232         }       /* while */
233
234         pr_debug("%s: Exiting Interrupt Handler\n",
235                         sc_adapter[card]->devicename);
236         return IRQ_HANDLED;
237 }