interrupt.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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 24extern int indicate_status(int, int, ulong, char *); 25extern void check_phystat(unsigned long); 26extern int receivemessage(int, RspMessage *); 27extern int sendmessage(int, unsigned int, unsigned int, unsigned int, 28 unsigned int, unsigned int, unsigned int, unsigned int *); 29extern void rcvpkt(int, RspMessage *); 30 31extern int cinst; 32extern board *sc_adapter[]; 33 34int get_card_from_irq(int irq) 35{ 36 int i; 37 38 for(i = 0 ; i < cinst ; i++) { 39 if(sc_adapter[i]->interrupt == irq) 40 return i; 41 } 42 return -1; 43} 44 45/* 46 * 47 */ 48irqreturn_t interrupt_handler(int interrupt, void *cardptr, struct pt_regs *regs) 49{ 50 51 RspMessage rcvmsg; 52 int channel; 53 int card; 54 55 card = get_card_from_irq(interrupt); 56 57 if(!IS_VALID_CARD(card)) { 58 pr_debug("Invalid param: %d is not a valid card id\n", card); 59 return IRQ_NONE; 60 } 61 62 pr_debug("%s: Entered Interrupt handler\n", 63 sc_adapter[card]->devicename); 64 65 /* 66 * Pull all of the waiting messages off the response queue 67 */ 68 while (!receivemessage(card, &rcvmsg)) { 69 /* 70 * Push the message to the adapter structure for 71 * send_and_receive to snoop 72 */ 73 if(sc_adapter[card]->want_async_messages) 74 memcpy(&(sc_adapter[card]->async_msg), 75 &rcvmsg, sizeof(RspMessage)); 76 77 channel = (unsigned int) rcvmsg.phy_link_no; 78 79 /* 80 * Trap Invalid request messages 81 */ 82 if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) { 83 pr_debug("%s: Invalid request Message, rsp_status = %d\n", 84 sc_adapter[card]->devicename, 85 rcvmsg.rsp_status); 86 break; 87 } 88 89 /* 90 * Check for a linkRead message 91 */ 92 if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read)) 93 { 94 pr_debug("%s: Received packet 0x%x bytes long at 0x%x\n", 95 sc_adapter[card]->devicename, 96 rcvmsg.msg_data.response.msg_len, 97 rcvmsg.msg_data.response.buff_offset); 98 rcvpkt(card, &rcvmsg); 99 continue; 100 101 } 102 103 /* 104 * Handle a write acknoledgement 105 */ 106 if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) { 107 pr_debug("%s: Packet Send ACK on channel %d\n", 108 sc_adapter[card]->devicename, 109 rcvmsg.phy_link_no); 110 sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++; 111 continue; 112 } 113 114 /* 115 * Handle a connection message 116 */ 117 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect)) 118 { 119 unsigned int callid; 120 setup_parm setup; 121 pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n", 122 sc_adapter[card]->devicename, 123 rcvmsg.phy_link_no, 124 rcvmsg.rsp_status, 125 rcvmsg.msg_data.byte_array[2]); 126 127 memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int)); 128 if(callid>=0x8000 && callid<=0xFFFF) 129 { 130 pr_debug("%s: Got Dial-Out Rsp\n", 131 sc_adapter[card]->devicename); 132 indicate_status(card, ISDN_STAT_DCONN, 133 (unsigned long)rcvmsg.phy_link_no-1,NULL); 134 135 } 136 else if(callid>=0x0000 && callid<=0x7FFF) 137 { 138 pr_debug("%s: Got Incoming Call\n", 139 sc_adapter[card]->devicename); 140 strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4])); 141 strcpy(setup.eazmsn, 142 sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn); 143 setup.si1 = 7; 144 setup.si2 = 0; 145 setup.plan = 0; 146 setup.screen = 0; 147 148 indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup); 149 indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL); 150 } 151 continue; 152 } 153 154 /* 155 * Handle a disconnection message 156 */ 157 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect)) 158 { 159 pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n", 160 sc_adapter[card]->devicename, 161 rcvmsg.phy_link_no, 162 rcvmsg.rsp_status, 163 rcvmsg.msg_data.byte_array[2]); 164 165 indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL); 166 indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL); 167 continue; 168 169 } 170 171 /* 172 * Handle a startProc engine up message 173 */ 174 if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) { 175 pr_debug("%s: Received EngineUp message\n", 176 sc_adapter[card]->devicename); 177 sc_adapter[card]->EngineUp = 1; 178 sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL); 179 sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL); 180 init_timer(&sc_adapter[card]->stat_timer); 181 sc_adapter[card]->stat_timer.function = check_phystat; 182 sc_adapter[card]->stat_timer.data = card; 183 sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME; 184 add_timer(&sc_adapter[card]->stat_timer); 185 continue; 186 } 187 188 /* 189 * Start proc response 190 */ 191 if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) { 192 pr_debug("%s: StartProc Response Status %d\n", 193 sc_adapter[card]->devicename, 194 rcvmsg.rsp_status); 195 continue; 196 } 197 198 /* 199 * Handle a GetMyNumber Rsp 200 */ 201 if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){ 202 strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array); 203 continue; 204 } 205 206 /* 207 * PhyStatus response 208 */ 209 if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) { 210 unsigned int b1stat, b2stat; 211 212 /* 213 * Covert the message data to the adapter->phystat code 214 */ 215 b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0]; 216 b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1]; 217 218 sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */ 219 pr_debug("%s: PhyStat is 0x%2x\n", 220 sc_adapter[card]->devicename, 221 sc_adapter[card]->nphystat); 222 continue; 223 } 224 225 226 /* 227 * Handle a GetFramFormat 228 */ 229 if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) { 230 if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) { 231 unsigned int proto = HDLC_PROTO; 232 /* 233 * Set board format to HDLC if it wasn't already 234 */ 235 pr_debug("%s: current frame format: 0x%x, will change to HDLC\n", 236 sc_adapter[card]->devicename, 237 rcvmsg.msg_data.byte_array[0]); 238 sendmessage(card, CEPID, ceReqTypeCall, 239 ceReqClass0, 240 ceReqCallSetFrameFormat, 241 (unsigned char) channel +1, 242 1,&proto); 243 } 244 continue; 245 } 246 247 /* 248 * Hmm... 249 */ 250 pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n", 251 sc_adapter[card]->devicename, 252 rcvmsg.type, rcvmsg.class, rcvmsg.code, 253 rcvmsg.phy_link_no); 254 255 } /* while */ 256 257 pr_debug("%s: Exiting Interrupt Handler\n", 258 sc_adapter[card]->devicename); 259 return IRQ_HANDLED; 260} 261