projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| fdf9d3a2 C |
1 | /* ct.c 4.6 81/07/05 */ |
| 2 | ||
| 3 | #include "ct.h" | |
| 4 | #if NCT > 0 | |
| 5 | /* | |
| 6 | * GP DR11C driver used for C/A/T | |
| 7 | * | |
| 8 | * BUGS: | |
| 9 | * This driver hasn't been tested in 4.1bsd | |
| 10 | */ | |
| 11 | ||
| 12 | #include "../h/param.h" | |
| 13 | #include "../h/systm.h" | |
| 14 | #include "../h/tty.h" | |
| 15 | #include "../h/pte.h" | |
| 16 | #include "../h/map.h" | |
| 17 | #include "../h/buf.h" | |
| 18 | #include "../h/ubareg.h" | |
| 19 | #include "../h/ubavar.h" | |
| 20 | #include "../h/conf.h" | |
| 21 | #include "../h/dir.h" | |
| 22 | #include "../h/user.h" | |
| 23 | ||
| 24 | #define PCAT (PZERO+9) | |
| 25 | #define CATHIWAT 100 | |
| 26 | #define CATLOWAT 30 | |
| 27 | ||
| 28 | struct ct_softc { | |
| 29 | int sc_openf; | |
| 30 | struct clist sc_oq; | |
| 31 | } ct_softc[NCT]; | |
| 32 | ||
| 33 | struct ctdevice { | |
| 34 | short ctcsr; | |
| 35 | short ctbuf; | |
| 36 | }; | |
| 37 | ||
| 38 | int ctprobe(), ctattach(), ctintr(); | |
| 39 | struct uba_device *ctdinfo[NCT]; | |
| 40 | u_short ctstd[] = { 0 }; | |
| 41 | struct uba_driver ctdriver = | |
| 42 | { ctprobe, 0, ctattach, 0, ctstd, "ct", ctdinfo }; | |
| 43 | ||
| 44 | #define CTUNIT(dev) (minor(dev)) | |
| 45 | ||
| 46 | ctprobe(reg) | |
| 47 | caddr_t reg; | |
| 48 | { | |
| 49 | register int br, cvec; /* value-result */ | |
| 50 | register struct ctdevice *ctaddr = (struct ctdevice *)reg; | |
| 51 | ||
| 52 | ctaddr->ctcsr = IENABLE; | |
| 53 | DELAY(10000); | |
| 54 | ctaddr->ctcsr = 0; | |
| 55 | } | |
| 56 | ||
| 57 | /*ARGSUSED*/ | |
| 58 | ctattach(ui) | |
| 59 | register struct uba_device *ui; | |
| 60 | { | |
| 61 | ||
| 62 | } | |
| 63 | ||
| 64 | ctopen(dev) | |
| 65 | dev_t dev; | |
| 66 | { | |
| 67 | register struct ct_softc *sc; | |
| 68 | register struct uba_device *ui; | |
| 69 | register struct ctdevice *ctaddr; | |
| 70 | ||
| 71 | if (CTUNIT(dev) >= NCT || (ui = ctdinfo[CTUNIT(dev)]) == 0 || | |
| 72 | ui->ui_alive == 0 || (sc = &ct_softc[CTUNIT(dev)])->sc_openf) { | |
| 73 | u.u_error = ENXIO; | |
| 74 | return; | |
| 75 | } | |
| 76 | sc->sc_openf = 1; | |
| 77 | ctaddr->ctcsr |= IENABLE; | |
| 78 | } | |
| 79 | ||
| 80 | ctclose(dev) | |
| 81 | dev_t dev; | |
| 82 | { | |
| 83 | ||
| 84 | ct_softc[CTUNIT(dev)].sc_openf = 0; | |
| 85 | ctintr(dev); | |
| 86 | } | |
| 87 | ||
| 88 | ctwrite(dev) | |
| 89 | dev_t dev; | |
| 90 | { | |
| 91 | register struct ct_softc *sc = &ct_softc[CTUNIT(dev)]; | |
| 92 | register int c; | |
| 93 | ||
| 94 | while ((c=cpass()) >= 0) { | |
| 95 | (void) spl5(); | |
| 96 | while (sc->sc_oq.c_cc > CATHIWAT) | |
| 97 | sleep((caddr_t)&sc->sc_oq, PCAT); | |
| 98 | while (putc(c, &sc->sc_oq) < 0) | |
| 99 | sleep((caddr_t)&lbolt, PCAT); | |
| 100 | ctintr(dev); | |
| 101 | (void) spl0(); | |
| 102 | } | |
| 103 | } | |
| 104 | ||
| 105 | ctintr(dev) | |
| 106 | dev_t dev; | |
| 107 | { | |
| 108 | register int c; | |
| 109 | register struct ct_softc *sc = &ct_softc[CTUNIT(dev)]; | |
| 110 | register struct ctdevice *ctaddr = | |
| 111 | (struct ctdevice *)ctdinfo[CTUNIT(dev)]->ui_addr; | |
| 112 | ||
| 113 | if (ctaddr->ctcsr&DONE) { | |
| 114 | if ((c = getc(&sc->sc_oq)) >= 0) { | |
| 115 | #if MH135A | |
| 116 | c |= (c & 01) << 8; /* for dr11c bug */ | |
| 117 | #endif | |
| 118 | ctaddr->ctbuf = c; | |
| 119 | if (sc->sc_oq.c_cc==0 || sc->sc_oq.c_cc==CATLOWAT) | |
| 120 | wakeup(&sc->sc_oq); | |
| 121 | } else { | |
| 122 | if (sc->sc_openf==0) | |
| 123 | ctaddr->ctcsr = 0; | |
| 124 | } | |
| 125 | } | |
| 126 | ||
| 127 | } | |
| 128 | #endif |