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