| 1 | /* Remote parallel interface for local parallel ports for GO32. |
| 2 | Copyright 1992, 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "serial.h" |
| 22 | #include <sys/dos.h> |
| 23 | |
| 24 | #if 0 |
| 25 | #define disable() asm("cli") |
| 26 | #define enable() asm("sti") |
| 27 | #endif |
| 28 | |
| 29 | /* this is a duumy to fill the ops structure */ |
| 30 | struct go32_ttystate |
| 31 | { |
| 32 | int bogus; |
| 33 | }; |
| 34 | |
| 35 | static int go32_open PARAMS ((serial_t scb, const char *name)); |
| 36 | static void go32_raw PARAMS ((serial_t scb)); |
| 37 | static int go32_readchar PARAMS ((serial_t scb, int timeout)); |
| 38 | static int go32_setbaudrate PARAMS ((serial_t scb, int rate)); |
| 39 | static int go32_write PARAMS ((serial_t scb, const char *str, int len)); |
| 40 | static void go32_close PARAMS ((serial_t scb)); |
| 41 | static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb)); |
| 42 | static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); |
| 43 | static unsigned long getivec PARAMS ((int which)); |
| 44 | static int dos_read PARAMS ((int fd, char *buf, int len)); |
| 45 | static int dos_write PARAMS ((int fd, const char *buf, int len)); |
| 46 | |
| 47 | #if 0 |
| 48 | static int iov[2]; |
| 49 | #define com_rb(n) iov[n] |
| 50 | #define com_tb(n) iov[n] |
| 51 | #define com_ier(n) iov[n]+1 |
| 52 | #define com_ifr(n) iov[n]+2 |
| 53 | #define com_bfr(n) iov[n]+3 |
| 54 | #define com_mcr(n) iov[n]+4 |
| 55 | #define com_lsr(n) iov[n]+5 |
| 56 | #define com_msr(n) iov[n]+6 |
| 57 | |
| 58 | static unsigned long |
| 59 | getivec (int which) |
| 60 | { |
| 61 | long tryaindex; |
| 62 | |
| 63 | if (GET_WORD (which * 4) != OFFSET) |
| 64 | return 0; |
| 65 | |
| 66 | /* Find out where in memory this lives */ |
| 67 | tryaindex = GET_WORD (which * 4 + 2) * 16 + GET_WORD (which * 4); |
| 68 | |
| 69 | if (GET_WORD (tryaindex + 2) != SIGNATURE) |
| 70 | return 0; |
| 71 | if (GET_WORD (tryaindex + 4) != VERSION) |
| 72 | return 0; |
| 73 | return tryaindex; |
| 74 | } |
| 75 | #endif /* 0 */ |
| 76 | |
| 77 | static int biosprn (cmd, byte, port) |
| 78 | int cmd; |
| 79 | int byte; |
| 80 | int port; |
| 81 | { |
| 82 | union REGS regs; |
| 83 | regs.h.ah = cmd; |
| 84 | regs.h.al = byte; |
| 85 | regs.x.dx = port; |
| 86 | int86 (0x17, ®s, ®s); |
| 87 | return regs.h.ah; |
| 88 | } |
| 89 | |
| 90 | static int |
| 91 | dos_read (fd, buf, len) |
| 92 | int fd; |
| 93 | char *buf; |
| 94 | int len; |
| 95 | { |
| 96 | int i; |
| 97 | |
| 98 | for (i = 0; i < len; i++) |
| 99 | { |
| 100 | *buf++ = biosprn (2, 0, fd); |
| 101 | } |
| 102 | return len; |
| 103 | } |
| 104 | |
| 105 | static int |
| 106 | dos_write (fd, buf, len) |
| 107 | int fd; |
| 108 | const char *buf; |
| 109 | int len; |
| 110 | { |
| 111 | int l; |
| 112 | |
| 113 | for (l = 0; l < len; l++) |
| 114 | biosprn (0, *buf++, fd); |
| 115 | |
| 116 | return len; |
| 117 | } |
| 118 | |
| 119 | static int |
| 120 | go32_open (scb, name) |
| 121 | serial_t scb; |
| 122 | const char *name; |
| 123 | { |
| 124 | int port, ret; |
| 125 | |
| 126 | if (strncasecmp (name, "lpt", 3) != 0) |
| 127 | { |
| 128 | errno = ENOENT; |
| 129 | return -1; |
| 130 | } |
| 131 | |
| 132 | port = name[3] - '0'; |
| 133 | |
| 134 | if (port != 1 && port != 2 && port != 3) |
| 135 | { |
| 136 | errno = ENOENT; |
| 137 | return -11; |
| 138 | } |
| 139 | |
| 140 | ret = biosprn (1, 0, port); |
| 141 | if (!ret) |
| 142 | return -1; |
| 143 | |
| 144 | scb->fd = port; |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | static int |
| 149 | go32_noop (scb) |
| 150 | serial_t scb; |
| 151 | { |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | static void |
| 156 | go32_raw (scb) |
| 157 | serial_t scb; |
| 158 | { |
| 159 | /* Always in raw mode */ |
| 160 | } |
| 161 | |
| 162 | static int |
| 163 | go32_readchar (scb, timeout) |
| 164 | serial_t scb; |
| 165 | int timeout; |
| 166 | { |
| 167 | char buf; |
| 168 | |
| 169 | if (dos_read (scb->fd, &buf, 1)) |
| 170 | return buf; |
| 171 | else |
| 172 | return SERIAL_TIMEOUT; |
| 173 | } |
| 174 | |
| 175 | static int |
| 176 | go32_write (scb, str, len) |
| 177 | serial_t scb; |
| 178 | const char *str; |
| 179 | int len; |
| 180 | { |
| 181 | dos_write (scb->fd, str, len); |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | /* go32_{get set}_tty_state() are both dummys to fill out the function |
| 186 | vector. Someday, they may do something real... */ |
| 187 | |
| 188 | static serial_ttystate |
| 189 | go32_get_tty_state (scb) |
| 190 | serial_t scb; |
| 191 | { |
| 192 | struct go32_ttystate *state; |
| 193 | |
| 194 | state = (struct go32_ttystate *) xmalloc (sizeof *state); |
| 195 | |
| 196 | return (serial_ttystate) state; |
| 197 | } |
| 198 | |
| 199 | static int |
| 200 | go32_set_tty_state (scb, ttystate) |
| 201 | serial_t scb; |
| 202 | serial_ttystate ttystate; |
| 203 | { |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int |
| 208 | go32_noflush_set_tty_state (scb, new_ttystate, old_ttystate) |
| 209 | serial_t scb; |
| 210 | serial_ttystate new_ttystate; |
| 211 | serial_ttystate old_ttystate; |
| 212 | { |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static void |
| 217 | go32_print_tty_state (scb, ttystate) |
| 218 | serial_t scb; |
| 219 | serial_ttystate ttystate; |
| 220 | { |
| 221 | /* Nothing to print. */ |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | static int |
| 226 | go32_setbaudrate (scb, rate) |
| 227 | serial_t scb; |
| 228 | int rate; |
| 229 | { |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static int |
| 234 | go32_setstopbits (scb, num) |
| 235 | serial_t scb; |
| 236 | int num; |
| 237 | { |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static void |
| 242 | go32_close (scb) |
| 243 | serial_t scb; |
| 244 | { |
| 245 | } |
| 246 | |
| 247 | static struct serial_ops go32_ops = |
| 248 | { |
| 249 | "parallel", |
| 250 | 0, |
| 251 | go32_open, |
| 252 | go32_close, |
| 253 | go32_readchar, |
| 254 | go32_write, |
| 255 | go32_noop, /* flush output */ |
| 256 | go32_noop, /* flush input */ |
| 257 | go32_noop, /* send break -- currently used only for nindy */ |
| 258 | go32_raw, |
| 259 | go32_get_tty_state, |
| 260 | go32_set_tty_state, |
| 261 | go32_print_tty_state, |
| 262 | go32_noflush_set_tty_state, |
| 263 | go32_setbaudrate, |
| 264 | go32_setstopbits, |
| 265 | }; |
| 266 | |
| 267 | void |
| 268 | _initialize_ser_go32 () |
| 269 | { |
| 270 | serial_add_interface (&go32_ops); |
| 271 | } |