| 1 | /* |
| 2 | * Line printer driver |
| 3 | */ |
| 4 | |
| 5 | #include "../h/param.h" |
| 6 | #include "../h/dir.h" |
| 7 | #include "../h/user.h" |
| 8 | #include "../h/tty.h" |
| 9 | #include "../h/uba.h" |
| 10 | |
| 11 | struct device *lp_addr[] = { (struct device *)(UBA0_DEV+0177514) }; |
| 12 | |
| 13 | #define LPPRI PZERO+10 |
| 14 | #define LPLOWAT 50 |
| 15 | #define LPHIWAT 100 |
| 16 | #define LPMAX 2 |
| 17 | |
| 18 | struct device { |
| 19 | short lpcsr, lpbuf; |
| 20 | }; |
| 21 | int lp_cnt = 1; |
| 22 | |
| 23 | struct lp { |
| 24 | struct clist l_outq; |
| 25 | char flag, ind; |
| 26 | short ccc, mcc, mlc; |
| 27 | short line, col; |
| 28 | } lp_dt[LPMAX]; |
| 29 | |
| 30 | #define OPEN 010 |
| 31 | #define CAP 020 |
| 32 | #define NOCR 040 |
| 33 | #define ASLP 0100 |
| 34 | |
| 35 | #define FORM 014 |
| 36 | |
| 37 | lpopen(dev, flag) |
| 38 | { |
| 39 | register unit; |
| 40 | register struct lp *lp; |
| 41 | |
| 42 | unit = dev&07; |
| 43 | if (unit >= lp_cnt || unit >= LPMAX || |
| 44 | (lp = &lp_dt[unit])->flag || lp_addr[unit]->lpcsr <0 ) { |
| 45 | u.u_error = EIO; |
| 46 | return; |
| 47 | } |
| 48 | lp->flag = (dev&077)|OPEN; |
| 49 | lp->ind = 4; |
| 50 | lp->col = 80; |
| 51 | lp->line = 66; |
| 52 | lp_addr[unit]->lpcsr |= IENABLE; |
| 53 | lpoutput(unit, FORM); |
| 54 | } |
| 55 | |
| 56 | lpclose(dev) |
| 57 | { |
| 58 | register unit; |
| 59 | |
| 60 | unit = dev&07; |
| 61 | lpoutput(unit, FORM); |
| 62 | lp_dt[unit].flag = 0; |
| 63 | } |
| 64 | |
| 65 | lpwrite(dev) |
| 66 | { |
| 67 | register c; |
| 68 | |
| 69 | while ((c=cpass())>=0) |
| 70 | lpoutput(dev&07, c); |
| 71 | } |
| 72 | |
| 73 | lpoutput(dev, c) |
| 74 | register dev, c; |
| 75 | { |
| 76 | register struct lp *lp; |
| 77 | |
| 78 | lp = &lp_dt[dev]; |
| 79 | if(lp->flag&CAP) { |
| 80 | if(c>='a' && c<='z') |
| 81 | c += 'A'-'a'; else |
| 82 | switch(c) { |
| 83 | case '{': |
| 84 | c = '('; |
| 85 | goto esc; |
| 86 | case '}': |
| 87 | c = ')'; |
| 88 | goto esc; |
| 89 | case '`': |
| 90 | c = '\''; |
| 91 | goto esc; |
| 92 | case '|': |
| 93 | c = '!'; |
| 94 | goto esc; |
| 95 | case '~': |
| 96 | c = '^'; |
| 97 | esc: |
| 98 | lpoutput(dev, c); |
| 99 | lp->ccc--; |
| 100 | c = '-'; |
| 101 | } |
| 102 | } |
| 103 | switch(c) { |
| 104 | case '\t': |
| 105 | lp->ccc = ((lp->ccc+8-lp->ind) & ~7) + lp->ind; |
| 106 | return; |
| 107 | case '\n': |
| 108 | lp->mlc++; |
| 109 | if(lp->mlc >= lp->line ) |
| 110 | c = FORM; |
| 111 | case FORM: |
| 112 | lp->mcc = 0; |
| 113 | if (lp->mlc) { |
| 114 | lpputc(dev, c); |
| 115 | if(c == FORM) |
| 116 | lp->mlc = 0; |
| 117 | } |
| 118 | case '\r': |
| 119 | lp->ccc = lp->ind; |
| 120 | return; |
| 121 | case 010: |
| 122 | if(lp->ccc > lp->ind) |
| 123 | lp->ccc--; |
| 124 | return; |
| 125 | case ' ': |
| 126 | lp->ccc++; |
| 127 | return; |
| 128 | default: |
| 129 | if(lp->ccc < lp->mcc) { |
| 130 | if (lp->flag&NOCR) { |
| 131 | lp->ccc++; |
| 132 | return; |
| 133 | } |
| 134 | lpputc(dev, '\r'); |
| 135 | lp->mcc = 0; |
| 136 | } |
| 137 | if(lp->ccc < lp->col) { |
| 138 | while(lp->ccc > lp->mcc) { |
| 139 | lpputc(dev, ' '); |
| 140 | lp->mcc++; |
| 141 | } |
| 142 | lpputc(dev, c); |
| 143 | lp->mcc++; |
| 144 | } |
| 145 | lp->ccc++; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | lpputc(dev, c) |
| 150 | register dev, c; |
| 151 | { |
| 152 | register struct lp *lp; |
| 153 | |
| 154 | lp = &lp_dt[dev]; |
| 155 | spl4(); |
| 156 | while (lp->l_outq.c_cc > LPHIWAT) { |
| 157 | lp->flag |= ASLP; |
| 158 | sleep(lp, LPPRI); |
| 159 | } |
| 160 | putc(c, &lp->l_outq); |
| 161 | lpintr(dev); |
| 162 | spl0(); |
| 163 | } |
| 164 | |
| 165 | lpintr(dev) |
| 166 | register dev; |
| 167 | { |
| 168 | register struct lp *lp; |
| 169 | register c; |
| 170 | |
| 171 | lp = &lp_dt[dev]; |
| 172 | while (lp_addr[dev]->lpcsr&DONE && (c = getc(&lp->l_outq)) >= 0) |
| 173 | lp_addr[dev]->lpbuf = c; |
| 174 | if (lp->l_outq.c_cc <= LPLOWAT && lp->flag&ASLP) { |
| 175 | lp->flag &= ~ASLP; |
| 176 | wakeup(lp); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | lpioctl(dev, cmd, addr, flag) |
| 181 | register caddr_t addr; |
| 182 | { |
| 183 | register int m; |
| 184 | struct lp *lp; |
| 185 | struct {char lsg_flag, lsg_ind; short lsg_line, lsg_col;} lpios; |
| 186 | |
| 187 | lp = &lp_dt[dev]; |
| 188 | switch (cmd) { |
| 189 | |
| 190 | case ('v'<<8)+0: |
| 191 | lpios.lsg_flag = lp->flag; |
| 192 | lpios.lsg_ind = lp->ind; |
| 193 | lpios.lsg_line = lp->line; |
| 194 | lpios.lsg_col = lp->col; |
| 195 | copyout(&lpios, addr, sizeof lpios); |
| 196 | return; |
| 197 | |
| 198 | case ('v'<<8)+1: |
| 199 | m = copyin(addr, &lpios, sizeof lpios); |
| 200 | if (m == -1) { |
| 201 | u.u_error = EFAULT; |
| 202 | return; |
| 203 | } |
| 204 | lp->flag = lpios.lsg_flag; |
| 205 | lp->ind = lpios.lsg_ind; |
| 206 | lp->line = lpios.lsg_line; |
| 207 | lp->col = lpios.lsg_col; |
| 208 | return; |
| 209 | |
| 210 | default: |
| 211 | u.u_error = ENOTTY; |
| 212 | return; |
| 213 | } |
| 214 | } |