projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 99aa0ab4 BJ |
1 | /* ct.c 4.1 81/02/23 */ |
| 2 | ||
| 3 | #include "cat.h" | |
| 4 | #if NCT > 0 | |
| 5 | /* | |
| 6 | * GP DR11C driver used for C/A/T | |
| 7 | */ | |
| 8 | ||
| 9 | #include "../h/param.h" | |
| 10 | #include "../h/tty.h" | |
| 11 | #include "../h/pte.h" | |
| 12 | #include "../h/map.h" | |
| 13 | #include "../h/uba.h" | |
| 14 | #include "../h/buf.h" | |
| 15 | #include "../h/conf.h" | |
| 16 | #include "../h/dir.h" | |
| 17 | #include "../h/user.h" | |
| 18 | ||
| 19 | #define PCAT (PZERO+9) | |
| 20 | #define CATHIWAT 100 | |
| 21 | #define CATLOWAT 30 | |
| 22 | ||
| 23 | struct { | |
| 24 | int catlock; | |
| 25 | struct clist oq; | |
| 26 | } cat; | |
| 27 | ||
| 28 | struct device { | |
| 29 | short catcsr; | |
| 30 | short catbuf; | |
| 31 | }; | |
| 32 | ||
| 33 | int ctintr(); | |
| 34 | ||
| 35 | ctopen(dev) | |
| 36 | { | |
| 37 | if (cat.catlock==0) { | |
| 38 | cat.catlock++; | |
| 39 | CATADDR->catcsr |= IENABLE; | |
| 40 | } else | |
| 41 | u.u_error = ENXIO; | |
| 42 | } | |
| 43 | ||
| 44 | ctclose() | |
| 45 | { | |
| 46 | cat.catlock = 0; | |
| 47 | ctintr(); | |
| 48 | } | |
| 49 | ||
| 50 | ctwrite(dev) | |
| 51 | { | |
| 52 | register c; | |
| 53 | extern lbolt; | |
| 54 | ||
| 55 | while ((c=cpass()) >= 0) { | |
| 56 | spl5(); | |
| 57 | while (cat.oq.c_cc > CATHIWAT) | |
| 58 | sleep((caddr_t)&cat.oq, PCAT); | |
| 59 | while (putc(c, &cat.oq) < 0) | |
| 60 | sleep((caddr_t)&lbolt, PCAT); | |
| 61 | ctintr(); | |
| 62 | spl0(); | |
| 63 | } | |
| 64 | } | |
| 65 | ||
| 66 | ctintr() | |
| 67 | { | |
| 68 | register int c; | |
| 69 | ||
| 70 | if (CATADDR->catcsr&DONE) { | |
| 71 | if ((c = getc(&cat.oq)) >= 0) { | |
| 72 | #if MH135A | |
| 73 | c |= (c & 01) << 8; /* for dr11c bug */ | |
| 74 | #endif | |
| 75 | CATADDR->catbuf = c; | |
| 76 | if (cat.oq.c_cc==0 || cat.oq.c_cc==CATLOWAT) | |
| 77 | wakeup(&cat.oq); | |
| 78 | } else { | |
| 79 | if (cat.catlock==0) | |
| 80 | CATADDR->catcsr = 0; | |
| 81 | } | |
| 82 | } | |
| 83 | ||
| 84 | } | |
| 85 | #endif |