Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[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 static int get_card_from_irq(int irq)
25 {
26         int i;
27
28         for(i = 0 ; i < cinst ; i++) {
29                 if(sc_adapter[i]->interrupt == irq)
30                         return i;
31         }
32         return -1;
33 }
34
35 /*
36  * 
37  */
38 irqreturn_t interrupt_handler(int interrupt, void *cardptr)
39 {
40
41         RspMessage rcvmsg;
42         int channel;
43         int card;
44
45         card = get_card_from_irq(interrupt);
46
47         if(!IS_VALID_CARD(card)) {
48                 pr_debug("Invalid param: %d is not a valid card id\n", card);
49                 return IRQ_NONE;
50         }
51
52         pr_debug("%s: Entered Interrupt handler\n",
53                         sc_adapter[card]->devicename);
54         
55         /*
56          * Pull all of the waiting messages off the response queue
57          */
58         while (!receivemessage(card, &rcvmsg)) {
59                 /*
60                  * Push the message to the adapter structure for
61                  * send_and_receive to snoop
62                  */
63                 if(sc_adapter[card]->want_async_messages)
64                         memcpy(&(sc_adapter[card]->async_msg),
65                                         &rcvmsg, sizeof(RspMessage));
66
67                 channel = (unsigned int) rcvmsg.phy_link_no;
68                 
69                 /*
70                  * Trap Invalid request messages
71                  */
72                 if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
73                         pr_debug("%s: Invalid request Message, rsp_status = %d\n", 
74                                 sc_adapter[card]->devicename,
75                                 rcvmsg.rsp_status);
76                         break;  
77                 }
78                 
79                 /*
80                  * Check for a linkRead message
81                  */
82                 if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
83                 {
84                         pr_debug("%s: Received packet 0x%x bytes long at 0x%lx\n",
85                                                 sc_adapter[card]->devicename,
86                                                 rcvmsg.msg_data.response.msg_len,
87                                                 rcvmsg.msg_data.response.buff_offset);
88                         rcvpkt(card, &rcvmsg);
89                         continue;
90
91                 }
92
93                 /*
94                  * Handle a write acknoledgement
95                  */
96                 if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
97                         pr_debug("%s: Packet Send ACK on channel %d\n",
98                                 sc_adapter[card]->devicename,
99                                 rcvmsg.phy_link_no);
100                         sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++;
101                         continue;
102                 }
103
104                 /*
105                  * Handle a connection message
106                  */
107                 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect)) 
108                 {
109                         unsigned int callid;
110                         setup_parm setup;       
111                         pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
112                                                 sc_adapter[card]->devicename,
113                                                 rcvmsg.phy_link_no,
114                                                 rcvmsg.rsp_status,
115                                                 rcvmsg.msg_data.byte_array[2]);
116                         
117                         memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int));
118                         if(callid>=0x8000 && callid<=0xFFFF)
119                         {               
120                                 pr_debug("%s: Got Dial-Out Rsp\n",
121                                         sc_adapter[card]->devicename);
122                                 indicate_status(card, ISDN_STAT_DCONN,
123                                                 (unsigned long)rcvmsg.phy_link_no-1,NULL);
124                                 
125                         }
126                         else if(callid>=0x0000 && callid<=0x7FFF)
127                         {
128                                 pr_debug("%s: Got Incoming Call\n",
129                                                 sc_adapter[card]->devicename);
130                                 strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
131                                 strcpy(setup.eazmsn,
132                                         sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
133                                 setup.si1 = 7;
134                                 setup.si2 = 0;
135                                 setup.plan = 0;
136                                 setup.screen = 0;
137
138                                 indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
139                                 indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
140                         }
141                         continue;
142                 }
143
144                 /*
145                  * Handle a disconnection message
146                  */
147                 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect)) 
148                 {
149                         pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
150                                                 sc_adapter[card]->devicename,
151                                                 rcvmsg.phy_link_no,
152                                                 rcvmsg.rsp_status,
153                                                 rcvmsg.msg_data.byte_array[2]);
154
155                         indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
156                         indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
157                         continue;
158
159                 }
160
161                 /*
162                  * Handle a startProc engine up message
163                  */
164                 if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
165                         pr_debug("%s: Received EngineUp message\n",
166                                 sc_adapter[card]->devicename);
167                         sc_adapter[card]->EngineUp = 1;
168                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
169                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
170                         init_timer(&sc_adapter[card]->stat_timer);
171                         sc_adapter[card]->stat_timer.function = check_phystat;
172                         sc_adapter[card]->stat_timer.data = card;
173                         sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
174                         add_timer(&sc_adapter[card]->stat_timer);
175                         continue;
176                 }
177
178                 /*
179                  * Start proc response
180                  */
181                 if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
182                         pr_debug("%s: StartProc Response Status %d\n",
183                                 sc_adapter[card]->devicename,
184                                 rcvmsg.rsp_status);
185                         continue;
186                 }
187
188                 /*
189                  * Handle a GetMyNumber Rsp
190                  */
191                 if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
192                         strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
193                         continue;
194                 }
195                         
196                 /*
197                  * PhyStatus response
198                  */
199                 if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
200                         unsigned int b1stat, b2stat;
201
202                         /*
203                          * Covert the message data to the adapter->phystat code
204                          */
205                         b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
206                         b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
207
208                         sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
209                         pr_debug("%s: PhyStat is 0x%2x\n",
210                                 sc_adapter[card]->devicename,
211                                 sc_adapter[card]->nphystat);
212                         continue;
213                 }
214
215
216                 /* 
217                  * Handle a GetFramFormat
218                  */
219                 if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
220                         if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
221                                 unsigned int proto = HDLC_PROTO;
222                                 /*
223                                  * Set board format to HDLC if it wasn't already
224                                  */
225                                 pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
226                                                 sc_adapter[card]->devicename,
227                                         rcvmsg.msg_data.byte_array[0]);
228                                 sendmessage(card, CEPID, ceReqTypeCall,
229                                                 ceReqClass0,
230                                                 ceReqCallSetFrameFormat,
231                                                 (unsigned char) channel +1,
232                                                 1,&proto);
233                                 }
234                         continue;
235                 }
236
237                 /*
238                  * Hmm...
239                  */
240                 pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
241                         sc_adapter[card]->devicename,
242                         rcvmsg.type, rcvmsg.class, rcvmsg.code,
243                         rcvmsg.phy_link_no);
244
245         }       /* while */
246
247         pr_debug("%s: Exiting Interrupt Handler\n",
248                         sc_adapter[card]->devicename);
249         return IRQ_HANDLED;
250 }