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Annotation of 43BSD/sys/vaxuba/ad.c, revision 1.1

1.1     ! root        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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