projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 868b4d42 DR |
1 | # |
| 2 | /* | |
| 3 | * Copyright 1973 Bell Telephone Laboratories Inc | |
| 4 | */ | |
| 5 | ||
| 6 | /* | |
| 7 | * DM-BB driver | |
| 8 | */ | |
| 9 | #include "../param.h" | |
| 10 | #include "../tty.h" | |
| 11 | #include "../conf.h" | |
| 12 | ||
| 13 | #define DMADDR 0170500 | |
| 14 | ||
| 15 | struct tty dh11[]; | |
| 16 | int ndh11; | |
| 17 | ||
| 18 | #define DONE 0200 | |
| 19 | #define SCENABL 040 | |
| 20 | #define CLSCAN 01000 | |
| 21 | #define TURNON 07 /* RQ send, CD lead, line enable */ | |
| 22 | #define TURNOFF 0 | |
| 23 | #define CARRIER 0100 | |
| 24 | ||
| 25 | struct dmregs { | |
| 26 | int dmcsr; | |
| 27 | int dmlstat; | |
| 28 | }; | |
| 29 | ||
| 30 | dmopen(dev) | |
| 31 | { | |
| 32 | register struct tty *tp; | |
| 33 | ||
| 34 | tp = &dh11[dev.d_minor]; | |
| 35 | DMADDR->dmcsr = dev.d_minor; | |
| 36 | DMADDR->dmlstat = TURNON; | |
| 37 | if (DMADDR->dmlstat&CARRIER) | |
| 38 | tp->t_state =| CARR_ON; | |
| 39 | DMADDR->dmcsr = IENABLE|SCENABL; | |
| 40 | spl5(); | |
| 41 | while ((tp->t_state&CARR_ON)==0) | |
| 42 | sleep(&tp->t_rawq, TTIPRI); | |
| 43 | spl0(); | |
| 44 | } | |
| 45 | ||
| 46 | dmclose(dev) | |
| 47 | { | |
| 48 | register struct tty *tp; | |
| 49 | ||
| 50 | tp = &dh11[dev.d_minor]; | |
| 51 | if (tp->t_flags&HUPCL) { | |
| 52 | DMADDR->dmcsr = dev.d_minor; | |
| 53 | DMADDR->dmlstat = TURNOFF; | |
| 54 | DMADDR->dmcsr = IENABLE|SCENABL; | |
| 55 | } | |
| 56 | } | |
| 57 | ||
| 58 | dmint() | |
| 59 | { | |
| 60 | register struct tty *tp; | |
| 61 | ||
| 62 | if (DMADDR->dmcsr&DONE) { | |
| 63 | tp = &dh11[DMADDR->dmcsr&017]; | |
| 64 | if (tp < &dh11[ndh11]) { | |
| 65 | wakeup(tp); | |
| 66 | if ((DMADDR->dmlstat&CARRIER)==0) { | |
| 67 | if ((tp->t_state&WOPEN)==0) { | |
| 68 | signal(tp, SIGHUP); | |
| 69 | DMADDR->dmlstat = 0; | |
| 70 | flushtty(tp); | |
| 71 | } | |
| 72 | tp->t_state =& ~CARR_ON; | |
| 73 | } else | |
| 74 | tp->t_state =| CARR_ON; | |
| 75 | } | |
| 76 | DMADDR->dmcsr = IENABLE|SCENABL; | |
| 77 | } | |
| 78 | } |