release/src-rt-6.x/linux/linux-2.6/drivers/isdn/hisax/arcofi.c

   1 /* $Id: arcofi.c,v 1.14.2.3 2004/01/13 14:31:24 keil Exp $
   2  *
   3  * Ansteuerung ARCOFI 2165
   4  *
   5  * Author       Karsten Keil
   6  * Copyright    by Karsten Keil      <keil@isdn4linux.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #include "hisax.h"
  14 #include "isdnl1.h"
  15 #include "isac.h"
  16 #include "arcofi.h"
  17
  18 #define ARCOFI_TIMER_VALUE      20
  19
  20 static void
  21 add_arcofi_timer(struct IsdnCardState *cs) {
  22         if (test_and_set_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
  23                 del_timer(&cs->dc.isac.arcofitimer);
  24         }
  25         init_timer(&cs->dc.isac.arcofitimer);
  26         cs->dc.isac.arcofitimer.expires = jiffies + ((ARCOFI_TIMER_VALUE * HZ)/1000);
  27         add_timer(&cs->dc.isac.arcofitimer);
  28 }
  29
  30 static void
  31 send_arcofi(struct IsdnCardState *cs) {
  32         u_char val;
  33
  34         add_arcofi_timer(cs);
  35         cs->dc.isac.mon_txp = 0;
  36         cs->dc.isac.mon_txc = cs->dc.isac.arcofi_list->len;
  37         memcpy(cs->dc.isac.mon_tx, cs->dc.isac.arcofi_list->msg, cs->dc.isac.mon_txc);
  38         switch(cs->dc.isac.arcofi_bc) {
  39                 case 0: break;
  40                 case 1: cs->dc.isac.mon_tx[1] |= 0x40;
  41                         break;
  42                 default: break;
  43         }
  44         cs->dc.isac.mocr &= 0x0f;
  45         cs->dc.isac.mocr |= 0xa0;
  46         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
  47         val = cs->readisac(cs, ISAC_MOSR);
  48         cs->writeisac(cs, ISAC_MOX1, cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
  49         cs->dc.isac.mocr |= 0x10;
  50         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
  51 }
  52
  53 int
  54 arcofi_fsm(struct IsdnCardState *cs, int event, void *data) {
  55         if (cs->debug & L1_DEB_MONITOR) {
  56                 debugl1(cs, "arcofi state %d event %d", cs->dc.isac.arcofi_state, event);
  57         }
  58         if (event == ARCOFI_TIMEOUT) {
  59                 cs->dc.isac.arcofi_state = ARCOFI_NOP;
  60                 test_and_set_bit(FLG_ARCOFI_ERROR, &cs->HW_Flags);
  61                 wake_up(&cs->dc.isac.arcofi_wait);
  62                 return(1);
  63         }
  64         switch (cs->dc.isac.arcofi_state) {
  65                 case ARCOFI_NOP:
  66                         if (event == ARCOFI_START) {
  67                                 cs->dc.isac.arcofi_list = data;
  68                                 cs->dc.isac.arcofi_state = ARCOFI_TRANSMIT;
  69                                 send_arcofi(cs);
  70                         }
  71                         break;
  72                 case ARCOFI_TRANSMIT:
  73                         if (event == ARCOFI_TX_END) {
  74                                 if (cs->dc.isac.arcofi_list->receive) {
  75                                         add_arcofi_timer(cs);
  76                                         cs->dc.isac.arcofi_state = ARCOFI_RECEIVE;
  77                                 } else {
  78                                         if (cs->dc.isac.arcofi_list->next) {
  79                                                 cs->dc.isac.arcofi_list =
  80                                                         cs->dc.isac.arcofi_list->next;
  81                                                 send_arcofi(cs);
  82                                         } else {
  83                                                 if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
  84                                                         del_timer(&cs->dc.isac.arcofitimer);
  85                                                 }
  86                                                 cs->dc.isac.arcofi_state = ARCOFI_NOP;
  87                                                 wake_up(&cs->dc.isac.arcofi_wait);
  88                                         }
  89                                 }
  90                         }
  91                         break;
  92                 case ARCOFI_RECEIVE:
  93                         if (event == ARCOFI_RX_END) {
  94                                 if (cs->dc.isac.arcofi_list->next) {
  95                                         cs->dc.isac.arcofi_list =
  96                                                 cs->dc.isac.arcofi_list->next;
  97                                         cs->dc.isac.arcofi_state = ARCOFI_TRANSMIT;
  98                                         send_arcofi(cs);
  99                                 } else {
 100                                         if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
 101                                                 del_timer(&cs->dc.isac.arcofitimer);
 102                                         }
 103                                         cs->dc.isac.arcofi_state = ARCOFI_NOP;
 104                                         wake_up(&cs->dc.isac.arcofi_wait);
 105                                 }
 106                         }
 107                         break;
 108                 default:
 109                         debugl1(cs, "Arcofi unknown state %x", cs->dc.isac.arcofi_state);
 110                         return(2);
 111         }
 112         return(0);
 113 }
 114
 115 static void
 116 arcofi_timer(struct IsdnCardState *cs) {
 117         arcofi_fsm(cs, ARCOFI_TIMEOUT, NULL);
 118 }
 119
 120 void
 121 clear_arcofi(struct IsdnCardState *cs) {
 122         if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
 123                 del_timer(&cs->dc.isac.arcofitimer);
 124         }
 125 }
 126
 127 void
 128 init_arcofi(struct IsdnCardState *cs) {
 129         cs->dc.isac.arcofitimer.function = (void *) arcofi_timer;
 130         cs->dc.isac.arcofitimer.data = (long) cs;
 131         init_timer(&cs->dc.isac.arcofitimer);
 132         init_waitqueue_head(&cs->dc.isac.arcofi_wait);
 133         test_and_set_bit(HW_ARCOFI, &cs->HW_Flags);
 134 }