1 files changed, 325 insertions, 0 deletions

diff --git a/drivers/isdn/pcbit/edss1.c b/drivers/isdn/pcbit/edss1.c
new file mode 100644
index 000000000000..93ca7de5670b
--- /dev/null
+++ b/drivers/isdn/pcbit/edss1.c
@@ -0,0 +1,325 @@
+/*
+ * DSS.1 Finite State Machine
+ * base: ITU-T Rec Q.931
+ *
+ * Copyright (C) 1996 Universidade de Lisboa
+ * 
+ * Written by Pedro Roque Marques (roque@di.fc.ul.pt)
+ *
+ * This software may be used and distributed according to the terms of 
+ * the GNU General Public License, incorporated herein by reference.
+ */
+
+/*
+ *        TODO: complete the FSM
+ *              move state/event descriptions to a user space logger
+ */
+
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/skbuff.h>
+
+#include <linux/timer.h>
+#include <asm/io.h>
+
+#include <linux/isdnif.h>
+
+#include "pcbit.h"
+#include "edss1.h"
+#include "layer2.h"
+#include "callbacks.h"
+
+
+extern void pcbit_state_change(struct pcbit_dev *, struct pcbit_chan *, 
+                               unsigned short i, unsigned short ev, 
+                               unsigned short f);
+
+extern struct pcbit_dev * dev_pcbit[MAX_PCBIT_CARDS];
+
+char * isdn_state_table[] = {
+  "Closed",
+  "Call initiated",
+  "Overlap sending",
+  "Outgoing call proceeding",
+  "NOT DEFINED",
+  "Call delivered",
+  "Call present",
+  "Call received",
+  "Connect request",
+  "Incoming call proceeding",
+  "Active",
+  "Disconnect request",
+  "Disconnect indication",
+  "NOT DEFINED",
+  "NOT DEFINED",
+  "Suspend request",
+  "NOT DEFINED",
+  "Resume request",
+  "NOT DEFINED",
+  "Release Request",
+  "NOT DEFINED",
+  "NOT DEFINED",
+  "NOT DEFINED",
+  "NOT DEFINED",
+  "NOT DEFINED",
+  "Overlap receiving",
+  "Select protocol on B-Channel",
+  "Activate B-channel protocol"
+};
+
+#ifdef DEBUG_ERRS
+static
+struct CauseValue {
+  byte nr;
+  char *descr;
+} cvlist[]={
+  {0x01,"Unallocated (unassigned) number"},
+  {0x02,"No route to specified transit network"},
+  {0x03,"No route to destination"},
+  {0x04,"Send special information tone"},
+  {0x05,"Misdialled trunk prefix"},
+  {0x06,"Channel unacceptable"},
+  {0x07,"Channel awarded and being delivered in an established channel"},
+  {0x08,"Preemption"},
+  {0x09,"Preemption - circuit reserved for reuse"},
+  {0x10,"Normal call clearing"},
+  {0x11,"User busy"},
+  {0x12,"No user responding"},
+  {0x13,"No answer from user (user alerted)"},
+  {0x14,"Subscriber absent"},
+  {0x15,"Call rejected"},
+  {0x16,"Number changed"},
+  {0x1a,"non-selected user clearing"},
+  {0x1b,"Destination out of order"},
+  {0x1c,"Invalid number format (address incomplete)"},
+  {0x1d,"Facility rejected"},
+  {0x1e,"Response to Status enquiry"},
+  {0x1f,"Normal, unspecified"},
+  {0x22,"No circuit/channel available"},
+  {0x26,"Network out of order"},
+  {0x27,"Permanent frame mode connection out-of-service"},
+  {0x28,"Permanent frame mode connection operational"},
+  {0x29,"Temporary failure"},
+  {0x2a,"Switching equipment congestion"},
+  {0x2b,"Access information discarded"},
+  {0x2c,"Requested circuit/channel not available"},
+  {0x2e,"Precedence call blocked"},
+  {0x2f,"Resource unavailable, unspecified"},
+  {0x31,"Quality of service unavailable"},
+  {0x32,"Requested facility not subscribed"},
+  {0x35,"Outgoing calls barred within CUG"},
+  {0x37,"Incoming calls barred within CUG"},
+  {0x39,"Bearer capability not authorized"},
+  {0x3a,"Bearer capability not presently available"},
+  {0x3e,"Inconsistency in designated outgoing access information and subscriber class"},
+  {0x3f,"Service or option not available, unspecified"},
+  {0x41,"Bearer capability not implemented"},
+  {0x42,"Channel type not implemented"},
+  {0x43,"Requested facility not implemented"},
+  {0x44,"Only restricted digital information bearer capability is available"},
+  {0x4f,"Service or option not implemented"},
+  {0x51,"Invalid call reference value"},
+  {0x52,"Identified channel does not exist"},
+  {0x53,"A suspended call exists, but this call identity does not"},
+  {0x54,"Call identity in use"},
+  {0x55,"No call suspended"},
+  {0x56,"Call having the requested call identity has been cleared"},
+  {0x57,"User not member of CUG"},
+  {0x58,"Incompatible destination"},
+  {0x5a,"Non-existent CUG"},
+  {0x5b,"Invalid transit network selection"},
+  {0x5f,"Invalid message, unspecified"},
+  {0x60,"Mandatory information element is missing"},
+  {0x61,"Message type non-existent or not implemented"},
+  {0x62,"Message not compatible with call state or message type non-existent or not implemented"},
+  {0x63,"Information element/parameter non-existent or not implemented"},
+  {0x64,"Invalid information element contents"},
+  {0x65,"Message not compatible with call state"},
+  {0x66,"Recovery on timer expiry"},
+  {0x67,"Parameter non-existent or not implemented - passed on"},
+  {0x6e,"Message with unrecognized parameter discarded"},
+  {0x6f,"Protocol error, unspecified"},
+  {0x7f,"Interworking, unspecified"}
+};
+
+#endif
+
+static struct isdn_event_desc {
+  unsigned short ev;
+  char * desc;
+} isdn_event_table [] = {
+  {EV_USR_SETUP_REQ,     "CC->L3: Setup Request"},
+  {EV_USR_SETUP_RESP,    "CC->L3: Setup Response"},
+  {EV_USR_PROCED_REQ,    "CC->L3: Proceeding Request"},
+  {EV_USR_RELEASE_REQ,   "CC->L3: Release Request"},
+
+  {EV_NET_SETUP,        "NET->TE: setup "},
+  {EV_NET_CALL_PROC,    "NET->TE: call proceeding"},
+  {EV_NET_SETUP_ACK,    "NET->TE: setup acknowledge (more info needed)"},
+  {EV_NET_CONN,         "NET->TE: connect"},
+  {EV_NET_CONN_ACK,     "NET->TE: connect acknowledge"},
+  {EV_NET_DISC,         "NET->TE: disconnect indication"},
+  {EV_NET_RELEASE,      "NET->TE: release"},
+  {EV_NET_RELEASE_COMP, "NET->TE: release complete"},
+  {EV_NET_SELP_RESP,    "Board: Select B-channel protocol ack"},
+  {EV_NET_ACTV_RESP,    "Board: Activate B-channel protocol ack"},
+  {EV_TIMER,            "Timeout"},
+  {0, "NULL"}
+};
+
+char * strisdnevent(ushort ev)
+{
+  struct isdn_event_desc * entry;
+ 
+  for (entry = isdn_event_table; entry->ev; entry++)
+    if (entry->ev == ev)
+      break;
+
+  return entry->desc;
+}
+
+/*
+ * Euro ISDN finite state machine
+ */
+
+static struct fsm_timer_entry fsm_timers[] = {
+  {ST_CALL_PROC, 10},
+  {ST_DISC_REQ, 2},
+  {ST_ACTIVE_SELP, 5},
+  {ST_ACTIVE_ACTV, 5},
+  {ST_INCM_PROC, 10},
+  {ST_CONN_REQ, 2},
+  {0xff, 0}
+};
+
+static struct fsm_entry fsm_table[] = {
+/* Connect Phase */
+  /* Outgoing */
+  {ST_NULL, ST_CALL_INIT, EV_USR_SETUP_REQ, cb_out_1},
+
+  {ST_CALL_INIT, ST_OVER_SEND, EV_NET_SETUP_ACK, cb_notdone},
+  {ST_CALL_INIT, ST_CALL_PROC, EV_NET_CALL_PROC, NULL},
+  {ST_CALL_INIT, ST_NULL, EV_NET_DISC, cb_out_2},
+
+  {ST_CALL_PROC, ST_ACTIVE_SELP, EV_NET_CONN, cb_out_2},
+  {ST_CALL_PROC, ST_NULL, EV_NET_DISC, cb_disc_1},
+  {ST_CALL_PROC, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+
+  /* Incoming */
+  {ST_NULL, ST_CALL_PRES, EV_NET_SETUP, NULL},
+
+  {ST_CALL_PRES, ST_INCM_PROC, EV_USR_PROCED_REQ, cb_in_1},
+  {ST_CALL_PRES, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+
+  {ST_INCM_PROC, ST_CONN_REQ, EV_USR_SETUP_RESP, cb_in_2},
+  {ST_INCM_PROC, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+
+  {ST_CONN_REQ, ST_ACTIVE_SELP, EV_NET_CONN_ACK, cb_in_3},
+
+  /* Active */
+  {ST_ACTIVE, ST_NULL, EV_NET_DISC, cb_disc_1},
+  {ST_ACTIVE, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+  {ST_ACTIVE, ST_NULL, EV_NET_RELEASE, cb_disc_3},
+
+  /* Disconnect */
+
+  {ST_DISC_REQ, ST_NULL, EV_NET_DISC, cb_disc_1},
+  {ST_DISC_REQ, ST_NULL, EV_NET_RELEASE, cb_disc_3},
+
+  /* protocol selection */
+  {ST_ACTIVE_SELP, ST_ACTIVE_ACTV, EV_NET_SELP_RESP, cb_selp_1},
+  {ST_ACTIVE_SELP, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+
+  {ST_ACTIVE_ACTV, ST_ACTIVE, EV_NET_ACTV_RESP, cb_open},
+  {ST_ACTIVE_ACTV, ST_DISC_REQ, EV_USR_RELEASE_REQ, cb_disc_2},
+
+  /* Timers */
+  {ST_CALL_PROC, ST_DISC_REQ, EV_TIMER, cb_disc_2},
+  {ST_DISC_REQ, ST_NULL, EV_TIMER, cb_disc_3},
+  {ST_ACTIVE_SELP, ST_DISC_REQ, EV_TIMER, cb_disc_2},
+  {ST_ACTIVE_ACTV, ST_DISC_REQ, EV_TIMER, cb_disc_2},        
+  {ST_INCM_PROC, ST_DISC_REQ, EV_TIMER, cb_disc_2},
+  {ST_CONN_REQ, ST_CONN_REQ, EV_TIMER, cb_in_2},
+        
+  {0xff, 0, 0, NULL}
+};
+
+
+static void pcbit_fsm_timer(unsigned long data)
+{
+        struct pcbit_dev *dev;
+        struct pcbit_chan *chan;
+
+        chan = (struct pcbit_chan *) data;
+
+        del_timer(&chan->fsm_timer);
+        chan->fsm_timer.function = NULL;
+
+        dev = chan2dev(chan);
+
+        if (dev == NULL) {
+                printk(KERN_WARNING "pcbit: timer for unknown device\n");
+                return;
+        }
+
+        pcbit_fsm_event(dev, chan, EV_TIMER, NULL);
+}
+
+
+void pcbit_fsm_event(struct pcbit_dev *dev, struct pcbit_chan *chan,
+                   unsigned short event, struct callb_data *data)
+{
+        struct fsm_entry * action;      
+        struct fsm_timer_entry *tentry;
+        unsigned long flags;
+
+        spin_lock_irqsave(&dev->lock, flags);
+
+        for (action = fsm_table; action->init != 0xff; action++)
+                if (action->init == chan->fsm_state && action->event == event)
+                        break;
+  
+        if (action->init == 0xff) {
+                
+                spin_unlock_irqrestore(&dev->lock, flags);
+                printk(KERN_DEBUG "fsm error: event %x on state %x\n", 
+                       event, chan->fsm_state);
+                return;
+        }
+
+        if (chan->fsm_timer.function) {
+                del_timer(&chan->fsm_timer);
+                chan->fsm_timer.function = NULL;
+        }
+
+        chan->fsm_state = action->final;
+  
+        pcbit_state_change(dev, chan, action->init, event, action->final);
+
+        for (tentry = fsm_timers; tentry->init != 0xff; tentry++)
+                if (tentry->init == chan->fsm_state)
+                        break;
+
+        if (tentry->init != 0xff) {
+                init_timer(&chan->fsm_timer);
+                chan->fsm_timer.function = &pcbit_fsm_timer;
+                chan->fsm_timer.data = (ulong) chan;
+                chan->fsm_timer.expires = jiffies + tentry->timeout * HZ;
+                add_timer(&chan->fsm_timer);
+        }
+
+        spin_unlock_irqrestore(&dev->lock, flags);
+
+        if (action->callb)
+                action->callb(dev, chan, data);
+
+}
+
+
+
+