Commit | Line | Data |
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55679787 SC |
1 | /* Remote serial interface using Hitachi E7000 PC ISA card in a PC |
2 | ||
3 | Copyright 1994 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
4ce7ba51 | 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
16a43bf4 | 20 | |
4ce7ba51 SG |
21 | #if defined __GO32__ || defined _WIN32 |
22 | #include "defs.h" | |
23 | #include "serial.h" | |
24 | #include "gdb_string.h" | |
16a43bf4 | 25 | |
4ce7ba51 | 26 | /* MSVC uses strnicmp instead of strncasecmp */ |
16a43bf4 | 27 | #ifdef _MSC_VER |
5b59224e | 28 | #define strncasecmp strnicmp |
4ce7ba51 SG |
29 | #define WIN32_LEAN_AND_MEAN |
30 | #include <windows.h> | |
16a43bf4 | 31 | #define W32SUT_32 |
4ce7ba51 | 32 | #include <w32sut.h> |
16a43bf4 | 33 | #endif |
16a43bf4 | 34 | |
4ce7ba51 | 35 | #ifdef __GO32__ |
5b59224e | 36 | #include <sys/dos.h> |
4ce7ba51 | 37 | #endif |
55679787 SC |
38 | |
39 | static int e7000pc_open PARAMS ((serial_t scb, const char *name)); | |
40 | static void e7000pc_raw PARAMS ((serial_t scb)); | |
41 | static int e7000pc_readchar PARAMS ((serial_t scb, int timeout)); | |
42 | static int e7000pc_setbaudrate PARAMS ((serial_t scb, int rate)); | |
43 | static int e7000pc_write PARAMS ((serial_t scb, const char *str, int len)); | |
44 | static void e7000pc_close PARAMS ((serial_t scb)); | |
45 | static serial_ttystate e7000pc_get_tty_state PARAMS ((serial_t scb)); | |
46 | static int e7000pc_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); | |
47 | static char *aptr PARAMS ((short p)); | |
48 | ||
49 | static int dos_async_init PARAMS ((int port)); | |
50 | static void dos_async_tx PARAMS ((const char c)); | |
51 | static int dos_async_rx PARAMS (()); | |
52 | ||
53 | ||
54 | ||
55 | #define OFF_DPD 0x0000 | |
56 | #define OFF_DDP 0x1000 | |
57 | #define OFF_CPD 0x2000 | |
58 | #define OFF_CDP 0x2400 | |
59 | #define OFF_FA 0x3000 | |
60 | #define OFF_FB 0x3002 | |
61 | #define OFF_FC 0x3004 | |
62 | #define OFF_IRQTOD 0x3008 | |
63 | #define OFF_IRQTOP 0x300a | |
64 | #define OFF_READY 0x300c | |
65 | #define OFF_PON 0x300e | |
66 | ||
67 | #define IDLE 0x0000 | |
68 | #define CMD_CI 0x4349 | |
69 | #define CMD_CO 0x434f | |
70 | #define CMD_LO 0x4c4f | |
71 | #define CMD_LS 0x4c53 | |
72 | #define CMD_SV 0x5356 | |
73 | #define CMD_SS 0x5353 | |
74 | #define CMD_OK 0x4f4b | |
75 | #define CMD_ER 0x4552 | |
76 | #define CMD_NF 0x4e46 | |
77 | #define CMD_AB 0x4142 | |
78 | #define CMD_ED 0x4544 | |
79 | #define CMD_CE 0x4345 | |
80 | ||
81 | static unsigned long fa; | |
82 | static unsigned long irqtod; | |
83 | static unsigned long ready; | |
84 | static unsigned long fb; | |
85 | static unsigned long cpd ; | |
86 | static unsigned long cdp ; | |
87 | static unsigned long ready; | |
88 | static unsigned long pon; | |
89 | static unsigned long irqtop; | |
90 | static unsigned long board_at; | |
91 | ||
4ce7ba51 | 92 | #ifdef __GO32__ |
5b59224e | 93 | |
55679787 SC |
94 | #define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);} |
95 | #define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);} | |
96 | #define GET_BYTE(x) ( dosmemget(x,1,&bb), bb) | |
97 | #define GET_WORD(x) ( dosmemget(x,2,&sb), sb) | |
55679787 SC |
98 | static unsigned char bb; |
99 | static unsigned short sb; | |
100 | ||
4ce7ba51 SG |
101 | #else /* win32 */ |
102 | ||
103 | #define SET_BYTE(x,y) *(volatile unsigned char *)(x) = (y) | |
104 | #define SET_WORD(x,y) *(volatile unsigned short *)(x) = (y) | |
105 | #define GET_BYTE(x) (*(volatile unsigned char *)(x)) | |
106 | #define GET_WORD(x) (*(volatile unsigned short *)(x)) | |
107 | #define dosmemget(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) | |
108 | #define dosmemput(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) | |
109 | #endif | |
55679787 SC |
110 | |
111 | static struct sw | |
112 | { | |
113 | int sw; | |
114 | int addr; | |
115 | } sigs[] = { | |
116 | {0x14, 0xd0000}, | |
117 | {0x15, 0xd4000}, | |
118 | {0x16, 0xd8000}, | |
119 | {0x17, 0xdc000}, | |
120 | 0}; | |
121 | ||
4ce7ba51 SG |
122 | #ifndef __GO32__ |
123 | /* Get the base of the data segment. This is needed to calculate the offset | |
124 | between data segment addresses and the base of linear memory, which is where | |
125 | device registers reside. Note that this is really only necessary for | |
126 | Win32s, since Win95 and NT keep the data segment at linear 0. */ | |
127 | ||
128 | static unsigned long | |
129 | get_ds_base (void) | |
130 | { | |
131 | unsigned short dsval; | |
132 | LDT_ENTRY ldt; | |
133 | unsigned long dsbase; | |
134 | ||
135 | __asm | |
136 | { | |
137 | mov dsval,ds | |
138 | } | |
139 | ||
140 | dsbase = 0; | |
141 | ||
142 | GetThreadSelectorEntry (GetCurrentThread(), dsval, &ldt); | |
143 | ||
144 | dsbase = ldt.HighWord.Bits.BaseHi << 24 | ldt.HighWord.Bits.BaseMid << 16 | |
145 | | ldt.BaseLow; | |
146 | ||
147 | return dsbase; | |
148 | } | |
149 | #else /* !__GO32__ */ | |
150 | #define get_ds_base() 0 | |
151 | #endif /* __GO32__ */ | |
152 | ||
55679787 SC |
153 | static int |
154 | e7000pc_init () | |
155 | { | |
55679787 | 156 | int try; |
4ce7ba51 | 157 | unsigned long dsbase; |
55679787 | 158 | |
4ce7ba51 | 159 | dsbase = get_ds_base (); |
55679787 | 160 | |
4ce7ba51 SG |
161 | /* Look around in memory for the board's signature */ |
162 | ||
163 | for (try = 0; sigs[try].sw; try++) | |
55679787 SC |
164 | { |
165 | int val; | |
4ce7ba51 | 166 | board_at = sigs[try].addr - dsbase; |
55679787 SC |
167 | fa = board_at + OFF_FA; |
168 | fb = board_at + OFF_FB; | |
169 | cpd = board_at + OFF_CPD; | |
170 | cdp = board_at + OFF_CDP; | |
171 | ready =board_at + OFF_READY; | |
172 | pon = board_at + OFF_PON; | |
173 | irqtop = board_at + OFF_IRQTOP; | |
174 | irqtod = board_at + OFF_IRQTOD; | |
4ce7ba51 | 175 | |
55679787 SC |
176 | val = GET_WORD (ready); |
177 | ||
178 | if (val == (0xaaa0 | sigs[try].sw)) | |
179 | { | |
4ce7ba51 | 180 | if (GET_WORD (pon) & 0xf) |
55679787 | 181 | { |
4ce7ba51 SG |
182 | SET_WORD (fa, 0); |
183 | SET_WORD (fb, 0); | |
55679787 | 184 | |
4ce7ba51 | 185 | SET_WORD (irqtop, 1); /* Disable interrupts from e7000 */ |
55679787 SC |
186 | SET_WORD (ready, 1); |
187 | printf_filtered ("\nConnected to the E7000PC at address 0x%x\n", | |
188 | sigs[try].addr); | |
189 | return 1; | |
190 | } | |
191 | error ("The E7000 PC board is working, but the E7000 is turned off.\n"); | |
192 | return 0; | |
193 | } | |
194 | } | |
195 | ||
196 | error ("GDB cannot connect to the E7000 PC board, check that it is installed\n\ | |
197 | and that the switch settings are correct. Some other DOS programs can \n\ | |
198 | stop the board from working. Try starting from a very minimal boot, \n\ | |
199 | perhaps you need to disable EMM386 over the region where the board has\n\ | |
200 | its I/O space, remove other unneeded cards, etc etc\n"); | |
201 | return 0; | |
202 | ||
203 | } | |
204 | ||
205 | static int pbuf_size; | |
206 | static int pbuf_index; | |
207 | ||
4ce7ba51 SG |
208 | /* Return next byte from cdp. If no more, then return -1. */ |
209 | ||
210 | static int | |
211 | e7000_get (void) | |
55679787 SC |
212 | { |
213 | static char pbuf[1000]; | |
214 | char tmp[1000]; | |
215 | int x; | |
4ce7ba51 | 216 | |
55679787 SC |
217 | if (pbuf_index < pbuf_size) |
218 | { | |
219 | x = pbuf[pbuf_index++]; | |
220 | } | |
4ce7ba51 | 221 | else if ((GET_WORD (fb) & 1)) |
55679787 SC |
222 | { |
223 | int i; | |
4ce7ba51 | 224 | pbuf_size = GET_WORD (cdp + 2); |
55679787 SC |
225 | |
226 | dosmemget (cdp + 8, pbuf_size + 1, tmp); | |
227 | ||
228 | /* Tell the E7000 we've eaten */ | |
4ce7ba51 | 229 | SET_WORD (fb, 0); |
55679787 SC |
230 | /* Swap it around */ |
231 | for (i = 0; i < pbuf_size; i++) | |
232 | { | |
233 | pbuf[i] = tmp[i^1]; | |
234 | } | |
235 | pbuf_index = 0; | |
236 | x = pbuf[pbuf_index++]; | |
237 | } | |
238 | else | |
239 | { | |
240 | x = -1; | |
241 | } | |
242 | return x; | |
243 | } | |
244 | ||
4ce7ba51 SG |
245 | /* Works just like read(), except that it takes a TIMEOUT in seconds. Note |
246 | that TIMEOUT == 0 is a poll, and TIMEOUT == -1 means wait forever. */ | |
247 | ||
55679787 SC |
248 | static int |
249 | dosasync_read (fd, buf, len, timeout) | |
250 | int fd; | |
251 | char *buf; | |
252 | int len; | |
253 | int timeout; | |
254 | ||
255 | { | |
256 | long now; | |
257 | long then; | |
258 | int i = 0; | |
55679787 SC |
259 | |
260 | /* Then look for some more if we're still hungry */ | |
261 | time (&now); | |
262 | then = now + timeout; | |
263 | while (i < len) | |
264 | { | |
265 | int ch = e7000_get(); | |
266 | ||
267 | /* While there's room in the buffer, and we've already | |
4ce7ba51 | 268 | read the stuff in, suck it over */ |
55679787 SC |
269 | if (ch != -1) |
270 | { | |
271 | buf[i++] = ch; | |
272 | while (i < len && pbuf_index < pbuf_size ) | |
273 | { | |
274 | ch = e7000_get(); | |
275 | if (ch == -1) | |
276 | break; | |
277 | buf[i++] = ch; | |
278 | } | |
279 | } | |
280 | ||
281 | time (&now); | |
282 | ||
4ce7ba51 SG |
283 | if (timeout == 0) |
284 | return i; | |
285 | if (now >= then && timeout > 0) | |
55679787 SC |
286 | { |
287 | return i; | |
288 | } | |
289 | } | |
290 | return len; | |
291 | } | |
292 | ||
293 | ||
294 | static int | |
295 | dosasync_write (fd, buf, len) | |
296 | int fd; | |
297 | const char *buf; | |
298 | int len; | |
299 | { | |
300 | int i; | |
301 | char dummy[1000]; | |
55679787 SC |
302 | |
303 | /* Construct copy locally */ | |
304 | ((short *)dummy)[0] = CMD_CI; | |
305 | ((short *)dummy)[1] = len; | |
306 | ((short *)dummy)[2] = 0; | |
307 | ((short *)dummy)[3] = 0; | |
308 | for (i = 0; i < len ; i++) | |
309 | { | |
310 | dummy[8 + i ^ 1] = buf[i]; | |
311 | } | |
312 | ||
313 | /* Wait for the card to get ready */ | |
4ce7ba51 | 314 | while (GET_WORD (fa) & 1) ; |
55679787 SC |
315 | |
316 | /* Blast onto the ISA card */ | |
317 | dosmemput (dummy, 8 + len + 1, cpd); | |
318 | ||
4ce7ba51 SG |
319 | SET_WORD (fa, 1); |
320 | SET_WORD (irqtod, 1); /* Interrupt the E7000 */ | |
55679787 SC |
321 | |
322 | return len; | |
323 | } | |
324 | ||
325 | static int | |
326 | e7000pc_open (scb, name) | |
327 | serial_t scb; | |
328 | const char *name; | |
329 | { | |
330 | if (strncasecmp (name, "pc", 2) != 0) | |
331 | { | |
332 | errno = ENOENT; | |
333 | return -1; | |
334 | } | |
4ce7ba51 | 335 | |
55679787 SC |
336 | scb->fd = e7000pc_init (); |
337 | ||
338 | if (!scb->fd) | |
339 | return -1; | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | static int | |
345 | e7000pc_noop (scb) | |
346 | serial_t scb; | |
347 | { | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static void | |
352 | e7000pc_raw (scb) | |
353 | serial_t scb; | |
354 | { | |
355 | /* Always in raw mode */ | |
356 | } | |
357 | ||
358 | static int | |
359 | e7000pc_readchar (scb, timeout) | |
360 | serial_t scb; | |
361 | int timeout; | |
362 | { | |
363 | char buf; | |
364 | ||
365 | top: | |
366 | ||
367 | if (dosasync_read (scb->fd, &buf, 1, timeout)) | |
368 | { | |
369 | if (buf == 0) goto top; | |
370 | return buf; | |
371 | } | |
372 | else | |
373 | return SERIAL_TIMEOUT; | |
374 | } | |
375 | ||
376 | struct e7000pc_ttystate { | |
377 | int dummy; | |
378 | }; | |
379 | ||
380 | /* e7000pc_{get set}_tty_state() are both dummys to fill out the function | |
381 | vector. Someday, they may do something real... */ | |
382 | ||
383 | static serial_ttystate | |
384 | e7000pc_get_tty_state (scb) | |
385 | serial_t scb; | |
386 | { | |
387 | struct e7000pc_ttystate *state; | |
388 | ||
389 | state = (struct e7000pc_ttystate *) xmalloc (sizeof *state); | |
390 | ||
391 | return (serial_ttystate) state; | |
392 | } | |
393 | ||
394 | static int | |
395 | e7000pc_set_tty_state (scb, ttystate) | |
396 | serial_t scb; | |
397 | serial_ttystate ttystate; | |
398 | { | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static int | |
403 | e7000pc_noflush_set_tty_state (scb, new_ttystate, old_ttystate) | |
404 | serial_t scb; | |
405 | serial_ttystate new_ttystate; | |
406 | serial_ttystate old_ttystate; | |
407 | { | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static void | |
412 | e7000pc_print_tty_state (scb, ttystate) | |
413 | serial_t scb; | |
414 | serial_ttystate ttystate; | |
415 | { | |
416 | /* Nothing to print. */ | |
417 | return; | |
418 | } | |
419 | ||
420 | static int | |
421 | e7000pc_setbaudrate (scb, rate) | |
422 | serial_t scb; | |
423 | int rate; | |
424 | { | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int | |
429 | e7000pc_write (scb, str, len) | |
430 | serial_t scb; | |
431 | const char *str; | |
432 | int len; | |
433 | { | |
434 | dosasync_write (scb->fd, str, len); | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static void | |
440 | e7000pc_close (scb) | |
441 | serial_t scb; | |
442 | { | |
443 | } | |
444 | ||
445 | static struct serial_ops e7000pc_ops = | |
446 | { | |
447 | "pc", | |
448 | 0, | |
449 | e7000pc_open, | |
450 | e7000pc_close, | |
451 | e7000pc_readchar, | |
452 | e7000pc_write, | |
453 | e7000pc_noop, /* flush output */ | |
454 | e7000pc_noop, /* flush input */ | |
455 | e7000pc_noop, /* send break -- currently used only for nindy */ | |
456 | e7000pc_raw, | |
457 | e7000pc_get_tty_state, | |
458 | e7000pc_set_tty_state, | |
459 | e7000pc_print_tty_state, | |
460 | e7000pc_noflush_set_tty_state, | |
461 | e7000pc_setbaudrate, | |
462 | }; | |
463 | ||
464 | void | |
465 | _initialize_ser_e7000pc () | |
466 | { | |
467 | serial_add_interface (&e7000pc_ops); | |
468 | } | |
469 | #else | |
470 | ||
471 | void | |
472 | _initialize_ser_e7000pc () | |
473 | { | |
474 | ||
475 | } | |
4ce7ba51 | 476 | #endif |