Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
interrupt.c
Go to the documentation of this file.
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 [email protected] 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  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 }
Generated on Thu Jan 10 2013 13:11:30 for Linux Kernel by   doxygen 1.8.2