4.3BSD - /usr/src/sys/vaxuba/ad.c

   1: /*
   2:  * Copyright (c) 1982, 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)ad.c	7.1 (Berkeley) 6/5/86
   7:  */
   8: 
   9: #include "ad.h"
  10: #if NAD > 0
  11: /*
  12:  * Data translation AD converter interface -- Bill Reeves
  13:  */
  14: #include "../machine/pte.h"
  15: 
  16: #include "param.h"
  17: #include "dir.h"
  18: #include "user.h"
  19: #include "buf.h"
  20: #include "systm.h"
  21: #include "map.h"
  22: 
  23: #include "ubareg.h"
  24: #include "ubavar.h"
  25: #include "adreg.h"
  26: 
  27: #define ADBUSY 01
  28: #define ADWAITPRI (PZERO+1)
  29: 
  30: int adprobe(), adattach();
  31: struct uba_device *addinfo[NAD];
  32: u_short adstd[] = { 0770400, 0000000, 0 };
  33: struct uba_driver addriver =
  34:     { adprobe, 0, adattach, 0, adstd, "ad", addinfo, 0, 0 };
  35: 
  36: struct ad {
  37:     char    ad_open;
  38:     short int ad_uid;
  39:     short int ad_state;
  40:     short int ad_softcsr;
  41:     short int ad_softdata;
  42:     short int ad_chan;
  43:     int ad_icnt;
  44:     int ad_loop;
  45: } ad[NAD];
  46: 
  47: #define ADUNIT(dev) (minor(dev))
  48: 
  49: adprobe(reg)
  50:     caddr_t reg;
  51: {
  52:     register int br, cvec;      /* value-result */
  53:     register struct addevice *adaddr = (struct addevice *) reg;
  54: 
  55:     adaddr->ad_csr = AD_IENABLE | AD_START;
  56:     DELAY(40000);
  57:     adaddr->ad_csr = 0;
  58:     return (sizeof (struct addevice));
  59: }
  60: 
  61: /*ARGSUSED*/
  62: adattach(ui)
  63:     struct uba_device *ui;
  64: {
  65: 
  66: }
  67: 
  68: adopen(dev)
  69:     dev_t dev;
  70: {
  71:     register struct ad *adp;
  72:     register struct uba_device *ui;
  73: 
  74:     if (ADUNIT(dev) >= NAD || (adp = &ad[ADUNIT(dev)])->ad_open ||
  75:         (ui = addinfo[ADUNIT(dev)]) == 0 || ui->ui_alive == 0)
  76:         return (ENXIO);
  77:     adp->ad_open = 1;
  78:     adp->ad_icnt = 0;
  79:     adp->ad_state = 0;
  80:     adp->ad_uid = u.u_uid;
  81:     return (0);
  82: }
  83: 
  84: adclose(dev)
  85:     dev_t dev;
  86: {
  87: 
  88:     ad[ADUNIT(dev)].ad_open = 0;
  89:     ad[ADUNIT(dev)].ad_state = 0;
  90: }
  91: 
  92: /*ARGSUSED*/
  93: adioctl(dev, cmd, addr, flag)
  94:     dev_t dev;
  95:     register caddr_t addr;
  96: {
  97:     register struct addevice *adaddr =
  98:         (struct addevice *) addinfo[ADUNIT(dev)]->ui_addr;
  99:     register struct uba_device *ui = addinfo[ADUNIT(dev)];
 100:     register struct ad *adp;
 101:     register int i;
 102:     short int chan;
 103: 
 104:     switch (cmd) {
 105: 
 106:     case ADIOSCHAN:
 107:         adp = &ad[ADUNIT(dev)];
 108:         adp->ad_chan = (*(int *)data)<<8;
 109:         break;
 110: 
 111:     case ADIOGETW:
 112:         adp = &ad[ADUNIT(dev)];
 113:         spl6();
 114:         adaddr->ad_csr = adp->ad_chan;
 115:         i = 1000;
 116:         while (i-- > 0 && (adaddr->ad_csr&037400) != adp->ad_chan) {
 117:             adp->ad_loop++;
 118:             adaddr->ad_csr = adp->ad_chan;
 119:         }
 120:         adp->ad_state |= ADBUSY;
 121:         adaddr->ad_csr |= AD_IENABLE|AD_START;
 122:         while (adp->ad_state&ADBUSY)
 123:             sleep((caddr_t)adp, ADWAITPRI);
 124:         spl0();
 125:         *(int *)data = adp->ad_softdata;
 126:         break;
 127: 
 128:     default:
 129:         return (ENOTTY);    /* Not a legal ioctl cmd. */
 130:     }
 131:     return (0);
 132: }
 133: 
 134: /*ARGSUSED*/
 135: adintr(dev)
 136:     dev_t dev;
 137: {
 138:     register struct addevice *adaddr =
 139:             (struct addevice *) addinfo[ADUNIT(dev)]->ui_addr;
 140:     register struct ad *adp = &ad[ADUNIT(dev)];
 141: 
 142:     adp->ad_icnt++;
 143:     adp->ad_softcsr = adaddr->ad_csr;
 144:     adp->ad_softdata = adaddr->ad_data;
 145:     if(adp->ad_state&ADBUSY) {
 146:         adp->ad_state &= ~ADBUSY;
 147:         wakeup((caddr_t)adp);
 148:     }
 149: }
 150: 
 151: adreset(uban)
 152:     int uban;
 153: {
 154:     register int i;
 155:     register struct uba_device *ui;
 156:     register struct ad *adp = ad;
 157:     register struct addevice *adaddr;
 158: 
 159:     for(i = 0; i < NAD; i++, adp++) {
 160:         if((ui = addinfo[i]) == 0 || ui->ui_alive == 0 ||
 161:                 ui->ui_ubanum != uban || adp->ad_open == 0)
 162:             continue;
 163:         printf(" ad%d", i);
 164:         if(adp->ad_state&ADBUSY == 0)
 165:             continue;
 166:         adaddr = (struct addevice *) ui->ui_addr;
 167:         adaddr->ad_csr = 0;
 168:         adaddr->ad_csr = adp->ad_chan|AD_IENABLE|AD_START;
 169:     }
 170: }
 171: #endif

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