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1 | /* | |
2 | * (C) Copyright 2014-2016 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0 | |
5 | */ | |
6 | ||
7 | #include "z180-serv.h" | |
8 | #include "common.h" | |
9 | #include <stdlib.h> | |
10 | #include <string.h> | |
11 | #include <stdbool.h> | |
12 | #include <util/atomic.h> | |
13 | ||
14 | #include "config.h" | |
15 | #include "background.h" | |
16 | #include "env.h" | |
17 | #include "ff.h" | |
18 | #include "serial.h" | |
19 | #include "z80-if.h" | |
20 | #include "debug.h" | |
21 | #include "print-utils.h" | |
22 | #include "timer.h" | |
23 | #include "time.h" | |
24 | #include "bcd.h" | |
25 | #include "rtc.h" | |
26 | ||
27 | #define DEBUG_CPM_SDIO 0 /* set to 1 to debug */ | |
28 | ||
29 | #define debug_cpmsd(fmt, args...) \ | |
30 | debug_cond(DEBUG_CPM_SDIO, fmt, ##args) | |
31 | ||
32 | ||
33 | /*--------------------------------------------------------------------------*/ | |
34 | ||
35 | struct msg_item { | |
36 | uint8_t fct; | |
37 | uint8_t sub_min, sub_max; | |
38 | void (*func)(uint8_t, int, uint8_t *); | |
39 | }; | |
40 | ||
41 | uint32_t msg_to_addr(uint8_t *msg) | |
42 | { | |
43 | union { | |
44 | uint32_t as32; | |
45 | uint8_t as8[4]; | |
46 | } addr; | |
47 | ||
48 | addr.as8[0] = msg[0]; | |
49 | addr.as8[1] = msg[1]; | |
50 | addr.as8[2] = msg[2]; | |
51 | addr.as8[3] = 0; | |
52 | ||
53 | return addr.as32; | |
54 | } | |
55 | ||
56 | ||
57 | static int msg_xmit_header(uint8_t func, uint8_t subf, int len) | |
58 | { | |
59 | z80_memfifo_putc(fifo_msgout, 0xAE); | |
60 | z80_memfifo_putc(fifo_msgout, len+2); | |
61 | z80_memfifo_putc(fifo_msgout, func); | |
62 | z80_memfifo_putc(fifo_msgout, subf); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | int msg_xmit(uint8_t func, uint8_t subf, int len, uint8_t *msg) | |
68 | { | |
69 | msg_xmit_header(func, subf, len); | |
70 | while (len--) | |
71 | z80_memfifo_putc(fifo_msgout, *msg++); | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
76 | void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg) | |
77 | { | |
78 | (void)len; | |
79 | ||
80 | z80_memfifo_init(subf, msg_to_addr(msg)); | |
81 | } | |
82 | ||
83 | ||
84 | void do_msg_char_out(uint8_t subf, int len, uint8_t * msg) | |
85 | { | |
86 | (void)subf; | |
87 | ||
88 | while (len--) | |
89 | putchar(*msg++); | |
90 | } | |
91 | ||
92 | /* echo message */ | |
93 | void do_msg_echo(uint8_t subf, int len, uint8_t * msg) | |
94 | { | |
95 | (void)subf; | |
96 | ||
97 | /* send re-echo */ | |
98 | msg_xmit(1, 3, len, msg); | |
99 | } | |
100 | ||
101 | /* get timer */ | |
102 | void do_msg_get_timer(uint8_t subf, int len, uint8_t * msg) | |
103 | { | |
104 | uint32_t time_ms = (len >= 4) ? *(uint32_t *) msg : 0; | |
105 | ||
106 | time_ms = get_timer(time_ms); | |
107 | msg_xmit(3, subf, sizeof(time_ms), (uint8_t *) &time_ms); | |
108 | } | |
109 | ||
110 | /* ---------------------------------------------------------------------------*/ | |
111 | ||
112 | #define CPM_DAY_OFFSET ((1978-1900) * 365 + 19) /* 19 leap years */ | |
113 | ||
114 | /* | |
115 | * Convert CP/M time stamp to a broken-down time structure | |
116 | * | |
117 | */ | |
118 | int mk_date_time (int len, uint8_t *msg, struct tm *tmp) | |
119 | { | |
120 | time_t stamp; | |
121 | ||
122 | if (len != 5) | |
123 | return -1; | |
124 | ||
125 | /* days since 2000-01-01 */ | |
126 | long days = msg[3] + (msg[4] << 8) - 8036; | |
127 | ||
128 | if (days < 0) | |
129 | return -1; | |
130 | ||
131 | stamp = days * ONE_DAY; | |
132 | stamp += bcd2bin(msg[0]); | |
133 | stamp += bcd2bin(msg[1]) * 60 ; | |
134 | stamp += bcd2bin(msg[2]) * 3600L; | |
135 | gmtime_r(&stamp, tmp); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | void mk_cpm_time(struct tm *tmp, uint8_t cpm_time[5]) | |
140 | { | |
141 | uint16_t days = 1; | |
142 | uint_fast8_t leap=2; | |
143 | ||
144 | for (int year=78; year < tmp->tm_year; year++) { | |
145 | days = days + 365 + (leap == 0); | |
146 | leap = (leap+1)%4; | |
147 | } | |
148 | days += tmp->tm_yday; | |
149 | ||
150 | cpm_time[0] = bin2bcd(tmp->tm_sec); | |
151 | cpm_time[1] = bin2bcd(tmp->tm_min); | |
152 | cpm_time[2] = bin2bcd(tmp->tm_hour); | |
153 | cpm_time[3] = days; | |
154 | cpm_time[4] = days >> 8; | |
155 | } | |
156 | ||
157 | /* get/set cp/m time */ | |
158 | void do_msg_get_set_time(uint8_t subf, int len, uint8_t * msg) | |
159 | { | |
160 | struct tm t; | |
161 | uint8_t cpm_time[5]; | |
162 | int rc; | |
163 | ||
164 | memset(cpm_time, 0, ARRAY_SIZE(cpm_time)); | |
165 | ||
166 | switch (subf) { | |
167 | case 3: /* set date & time */ | |
168 | /* initialize t with current time */ | |
169 | rc = rtc_get (&t); | |
170 | ||
171 | if (rc >= 0) { | |
172 | /* insert new date & time */ | |
173 | if (mk_date_time (len, msg, &t) != 0) { | |
174 | my_puts_P(PSTR("## set_time: Bad date format\n")); | |
175 | break; | |
176 | } | |
177 | ||
178 | time_t time; | |
179 | time = mk_gmtime(&t); | |
180 | gmtime_r(&time, &t); | |
181 | ||
182 | /* and write to RTC */ | |
183 | rc = rtc_set (&t); | |
184 | if(rc) | |
185 | my_puts_P(PSTR("## set_time: Set date failed\n")); | |
186 | } else { | |
187 | my_puts_P(PSTR("## set_time: Get date failed\n")); | |
188 | } | |
189 | /* FALL TROUGH */ | |
190 | case 2: /* get date & time */ | |
191 | rc = rtc_get (&t); | |
192 | if (rc >= 0) { | |
193 | time_t time; | |
194 | time = mk_gmtime(&t); | |
195 | //mktime(&t); | |
196 | gmtime_r(&time, &t); | |
197 | ||
198 | mk_cpm_time(&t, cpm_time); | |
199 | } else { | |
200 | my_puts_P(PSTR("## get_time: Get date failed\n")); | |
201 | } | |
202 | break; | |
203 | } | |
204 | ||
205 | msg_xmit(3, subf, sizeof(cpm_time), cpm_time); | |
206 | } | |
207 | ||
208 | /* ---------------------------------------------------------------------------*/ | |
209 | ||
210 | static uint8_t drv; | |
211 | static uint8_t disk_buffer[CONFIG_CPM_BLOCK_SIZE]; | |
212 | static struct cpm_drive_s drv_table[CONFIG_CPM_MAX_DRIVE]; | |
213 | static int handle_cpm_drv_to; | |
214 | ||
215 | typedef enum {SINGLE, START, MIDDLE, END} dbgmsg_t; | |
216 | ||
217 | void drv_debug(dbgmsg_t phase, const FLASH char *const fmt, ...) \ | |
218 | { | |
219 | struct cpm_drive_s *dp = &drv_table[drv]; | |
220 | ||
221 | if (dp->opt & DRV_OPT_DEBUG) { | |
222 | ||
223 | va_list ap; | |
224 | va_start (ap, fmt); | |
225 | ||
226 | if (phase == SINGLE || phase == START) | |
227 | printf_P(PSTR("# %7lu dsk%d: "), get_timer(0), drv); | |
228 | ||
229 | vfprintf_P (stdout, fmt, ap); | |
230 | ||
231 | if (phase == SINGLE || phase == END) | |
232 | putc('\n', stdout); | |
233 | ||
234 | va_end (ap); | |
235 | } | |
236 | } | |
237 | ||
238 | int drv_list(void) | |
239 | { | |
240 | for (uint8_t i = 0; i < CONFIG_CPM_MAX_DRIVE; i++) { | |
241 | struct cpm_drive_s * p = &drv_table[i]; | |
242 | if (p->img_name) { | |
243 | printf_P(PSTR(" dsk%d: %2s %3s attached to %s\n"), i, | |
244 | p->opt&DRV_OPT_RO ? "RO":"RW", p->opt&DRV_OPT_DEBUG ? "DBG":"", | |
245 | p->img_name); | |
246 | } | |
247 | } | |
248 | return 0; | |
249 | } | |
250 | ||
251 | int drv_detach(uint8_t unit) | |
252 | { | |
253 | drv = unit; | |
254 | if (drv < CONFIG_CPM_MAX_DRIVE) { | |
255 | struct cpm_drive_s *p = &drv_table[drv]; | |
256 | ||
257 | drv_debug(SINGLE, PSTR("detach from '%s'"), p->img_name ? p->img_name : "-"); | |
258 | ||
259 | if (p->img_name) { | |
260 | f_close(&p->fd); | |
261 | free(p->img_name); | |
262 | p->opt = 0; | |
263 | p->flags &= ~DRV_FLG_DIRTY; | |
264 | p->img_name = NULL; | |
265 | ||
266 | uint32_t scb = getenv_ulong(PSTR(ENV_CPM3_SCB), 16, 0); | |
267 | if (scb && (z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
268 | z80_write(scb + 0xf0, 0xff); | |
269 | z80_write(p->dph + 11, 0xff); | |
270 | z80_bus_cmd(Release); | |
271 | } | |
272 | } | |
273 | } | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static int drv_find_file_attached(const char *fn) | |
278 | { | |
279 | for (uint8_t i = 0; i < CONFIG_CPM_MAX_DRIVE; i++) { | |
280 | struct cpm_drive_s *p = &drv_table[i]; | |
281 | if (p->img_name && !strcmp(fn, p->img_name)) { | |
282 | return i; | |
283 | } | |
284 | } | |
285 | return -1; | |
286 | } | |
287 | ||
288 | int drv_attach(uint8_t unit, const char *filename, drv_opt_t options) | |
289 | { | |
290 | int res; | |
291 | ||
292 | drv = unit; | |
293 | if (drv >= CONFIG_CPM_MAX_DRIVE) | |
294 | return AT_RANGE; | |
295 | ||
296 | struct cpm_drive_s *p = &drv_table[drv]; | |
297 | ||
298 | if (options & DRV_OPT_REATTATCH) { | |
299 | if (filename) { | |
300 | return AT_ERROR; | |
301 | } | |
302 | ||
303 | if (!p->img_name) { | |
304 | return AT_NOT; | |
305 | } | |
306 | ||
307 | /* change options */ | |
308 | if ((p->opt ^ options) & DRV_OPT_RO) { | |
309 | f_close(&p->fd); | |
310 | res = f_open(&p->fd, p->img_name, | |
311 | FA_READ | (options&DRV_OPT_RO ? 0 : FA_WRITE)); | |
312 | } | |
313 | ||
314 | p->opt = options & ~DRV_OPT_REATTATCH; | |
315 | ||
316 | } else { | |
317 | ||
318 | if (p->img_name) | |
319 | return AT_ALREADY; | |
320 | if (drv_find_file_attached(filename) >= 0) | |
321 | return AT_OTHER; | |
322 | ||
323 | p->opt = options; | |
324 | ||
325 | /* new attachment */ | |
326 | ||
327 | if ((p->img_name = strdup(filename)) == NULL) | |
328 | return AT_NOMEM; | |
329 | ||
330 | res = f_open(&p->fd, p->img_name, | |
331 | FA_READ | (options&DRV_OPT_RO ? 0 : FA_WRITE)); | |
332 | ||
333 | if (!res && f_size(&p->fd) < CONFIG_CPM_DISKSIZE) { | |
334 | #if 0 | |
335 | unsigned int bw; | |
336 | debug_cpmsd(" expanding image file from %ld to %ld\n", | |
337 | f_size(&p->fd), CONFIG_CPM_DISKSIZE); | |
338 | ||
339 | res = f_lseek(&p->fd, CONFIG_CPM_DISKSIZE-CONFIG_CPM_BLOCK_SIZE); | |
340 | if (!res) { | |
341 | memset(disk_buffer, 0xe5, CONFIG_CPM_BLOCK_SIZE); | |
342 | res = f_write(&p->fd, disk_buffer, CONFIG_CPM_BLOCK_SIZE, &bw); | |
343 | if (res || bw < CONFIG_CPM_BLOCK_SIZE) { | |
344 | debug_cpmsd(" failed! res: %d, bytes written: %u\n", res, bw); | |
345 | } | |
346 | p->flags |= DRV_FLG_DIRTY; | |
347 | bg_setstat(handle_cpm_drv_to, 1); | |
348 | } | |
349 | #else | |
350 | drv_debug(SINGLE, PSTR("wrong image file size: %ld, should be %ld"), | |
351 | f_size(&p->fd), CONFIG_CPM_DISKSIZE); | |
352 | res = 64; | |
353 | #endif | |
354 | } | |
355 | if (res) { | |
356 | drv_detach(drv); | |
357 | return AT_OPEN; | |
358 | } | |
359 | } | |
360 | ||
361 | return AT_OK; | |
362 | } | |
363 | ||
364 | ||
365 | int cpm_drv_to(int state) | |
366 | { | |
367 | static uint32_t ts; | |
368 | ||
369 | switch(state) { | |
370 | case 0: | |
371 | break; | |
372 | ||
373 | case 1: | |
374 | ts = get_timer(0); | |
375 | state = 2; | |
376 | break; | |
377 | ||
378 | case 2: | |
379 | if (get_timer(ts) > 1000) { | |
380 | for (uint_fast8_t i=0; i < CONFIG_CPM_MAX_DRIVE; i++) { | |
381 | if (drv_table[i].flags & DRV_FLG_DIRTY) { | |
382 | drv_table[i].flags &= ~DRV_FLG_DIRTY; | |
383 | f_sync(&drv_table[i].fd); | |
384 | drv = i; | |
385 | drv_debug(SINGLE, PSTR("f_sync")); | |
386 | } | |
387 | } | |
388 | state = 0; | |
389 | } | |
390 | } | |
391 | return state; | |
392 | } | |
393 | ||
394 | static const FLASH char * const FLASH rc_messages[] = { | |
395 | FSTR("OK"), | |
396 | FSTR("Internal error: wrong message len"), /* 01 */ | |
397 | FSTR("Invalid relative drive #"), /* 02 */ | |
398 | FSTR("Bus timeout"), /* 03 */ | |
399 | FSTR("Access byond disk size"), /* 04 */ | |
400 | FSTR("Write protect"), /* 05 */ | |
401 | FSTR("No media"), /* 06 */ | |
402 | FSTR("R/W address == 0 !!!!"), /* 07 */ | |
403 | }; | |
404 | ||
405 | void msg_cpm_result(uint8_t subf, uint8_t rc, int res) | |
406 | { | |
407 | uint8_t result_msg[3]; | |
408 | ||
409 | if (res) | |
410 | rc |= 0x80; | |
411 | ||
412 | result_msg[0] = rc; | |
413 | result_msg[1] = res; | |
414 | result_msg[2] = res >> 8; | |
415 | ||
416 | msg_xmit(2, subf, sizeof(result_msg), result_msg); | |
417 | ||
418 | if (rc) { | |
419 | #if GCC_BUG_61443 | |
420 | char msg[40]; | |
421 | strncpy_P(msg, rc_messages[rc & 0x7f], sizeof msg -1); | |
422 | drv_debug(END, PSTR(" rc: %.02x/%d, '%s'"), | |
423 | rc, res, msg); | |
424 | #else | |
425 | drv_debug(END, PSTR(" rc: %.02x/%d, '%S'"), | |
426 | rc, res, rc_messages[rc & 0x7f]); | |
427 | #endif | |
428 | } else | |
429 | drv_debug(END, PSTR("")); | |
430 | ||
431 | } | |
432 | ||
433 | /* | |
434 | db 2 ; disk command | |
435 | ds 1 ; subcommand (login/read/write) | |
436 | ds 1 ; @adrv (8 bits) +0 | |
437 | ds 1 ; @rdrv (8 bits) +1 | |
438 | ds 3 ; @xdph (24 bits) +2 | |
439 | */ | |
440 | ||
441 | void do_msg_cpm_login(uint8_t subf, int len, uint8_t * msg) | |
442 | { | |
443 | struct cpm_drive_s *dp; | |
444 | FRESULT res = 0; | |
445 | ||
446 | (void)subf; | |
447 | ||
448 | /* Get relative drive number */ | |
449 | drv = msg[1]; | |
450 | drv_debug(START, PSTR("login")); | |
451 | ||
452 | if (len != 5) { | |
453 | return msg_cpm_result(subf, 0x01, res); | |
454 | } | |
455 | ||
456 | if ( drv >= CONFIG_CPM_MAX_DRIVE) { | |
457 | /* invalid relative drive number */ | |
458 | return msg_cpm_result(subf, 0x02, res); | |
459 | } | |
460 | ||
461 | dp = &drv_table[drv]; | |
462 | dp->flags &= ~DRV_FLG_OPEN; | |
463 | dp->dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2]; | |
464 | ||
465 | if (dp->img_name == NULL) { | |
466 | /* no file attached */ | |
467 | return msg_cpm_result(subf, 0x06, res); | |
468 | } | |
469 | ||
470 | f_close(&dp->fd); | |
471 | res = f_open(&dp->fd, dp->img_name, | |
472 | FA_READ | (dp->opt&DRV_OPT_RO ? 0 : FA_WRITE)); | |
473 | ||
474 | dp->flags |= DRV_FLG_OPEN; | |
475 | ||
476 | /* send result*/ | |
477 | msg_cpm_result(subf, 0x00, res); | |
478 | } | |
479 | ||
480 | ||
481 | /* | |
482 | db 2 ; disk command | |
483 | ds 1 ; subcommand (login/read/write) | |
484 | ds 1 ; @adrv (8 bits) +0 | |
485 | ds 1 ; @rdrv (8 bits) +1 | |
486 | ds 2 ; @trk (16 bits) +2 | |
487 | ds 2 ; @sect(16 bits) +4 | |
488 | ds 1 ; @cnt (8 bits) +6 | |
489 | ds 3 ; phys. transfer addr +7 | |
490 | */ | |
491 | ||
492 | #define ADRV 0 | |
493 | #define RDRV 1 | |
494 | #define TRK 2 | |
495 | #define SEC 4 | |
496 | #define CNT 6 | |
497 | #define ADDR 7 | |
498 | ||
499 | void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg) | |
500 | { | |
501 | struct cpm_drive_s *dp; | |
502 | uint32_t addr; | |
503 | uint32_t pos; | |
504 | uint16_t track; | |
505 | uint16_t sec; | |
506 | uint8_t secs; | |
507 | bool dowrite; | |
508 | FRESULT res = 0; | |
509 | uint8_t rc = 0; | |
510 | bool buserr = 0; | |
511 | ||
512 | drv = msg[RDRV]; | |
513 | dowrite = (subf == 2); | |
514 | ||
515 | drv_debug(START, PSTR("%2S"), dowrite ? PSTR("W ") : PSTR(" R")); | |
516 | ||
517 | if (len != 10) { | |
518 | return msg_cpm_result(subf, 0x01, res); | |
519 | } | |
520 | if ( drv>= CONFIG_CPM_MAX_DRIVE) { | |
521 | return msg_cpm_result(subf, 0x02, res); | |
522 | } | |
523 | ||
524 | dp = &drv_table[drv]; | |
525 | track = (uint16_t)(msg[TRK+1] << 8) + msg[TRK]; | |
526 | sec = (uint16_t)(msg[SEC+1] << 8) + msg[SEC]; | |
527 | secs = msg[CNT]; | |
528 | addr = ((uint32_t)msg[ADDR+2] << 16) + ((uint16_t)msg[ADDR+1] << 8) + msg[ADDR]; | |
529 | ||
530 | if (dp->img_name == NULL) { | |
531 | /* no media */ | |
532 | return msg_cpm_result(subf, 0x06, res); | |
533 | } | |
534 | ||
535 | /* TODO: tracks per sector from dpb */ | |
536 | pos = (track * 8UL + sec) * CONFIG_CPM_BLOCK_SIZE; | |
537 | ||
538 | drv_debug(MIDDLE, PSTR(" T:%4d, S:%2d, cnt:%2d, lba: %.8lx, addr: %.5lx"), | |
539 | track, sec, secs, pos, addr); | |
540 | ||
541 | if (addr == 0) { | |
542 | return msg_cpm_result(subf, 0x07, res); | |
543 | } | |
544 | ||
545 | if (dowrite && dp->opt & DRV_OPT_RO) { | |
546 | return msg_cpm_result(subf, 0x05, res); | |
547 | } | |
548 | ||
549 | ||
550 | if (pos + secs * CONFIG_CPM_BLOCK_SIZE > CONFIG_CPM_DISKSIZE) { | |
551 | drv_debug(MIDDLE, PSTR(" access > DISKSIZE:%.8lx!"), | |
552 | CONFIG_CPM_DISKSIZE); | |
553 | return msg_cpm_result(subf, 0x04, res); | |
554 | } | |
555 | ||
556 | res = f_lseek(&dp->fd, pos); | |
557 | ||
558 | while (!res && secs--) { | |
559 | unsigned int brw; | |
560 | if (dowrite) { | |
561 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
562 | buserr = 1; | |
563 | break; | |
564 | } else { | |
565 | z80_read_block(disk_buffer, addr, CONFIG_CPM_BLOCK_SIZE); | |
566 | z80_bus_cmd(Release); | |
567 | } | |
568 | res = f_write(&dp->fd, disk_buffer, CONFIG_CPM_BLOCK_SIZE, &brw); | |
569 | } else { | |
570 | res = f_read(&dp->fd, disk_buffer, CONFIG_CPM_BLOCK_SIZE, &brw); | |
571 | if (res == FR_OK) { | |
572 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
573 | buserr = 1; | |
574 | break; | |
575 | } else { | |
576 | z80_write_block(disk_buffer, addr, CONFIG_CPM_BLOCK_SIZE); | |
577 | z80_bus_cmd(Release); | |
578 | } | |
579 | } | |
580 | } | |
581 | if (brw != CONFIG_CPM_BLOCK_SIZE) { | |
582 | drv_debug(MIDDLE, PSTR(" short rd/wr: res: %d, brw: %u"), | |
583 | res, brw); | |
584 | res = 64; | |
585 | } | |
586 | addr += CONFIG_CPM_BLOCK_SIZE; | |
587 | } | |
588 | ||
589 | if (dowrite && !res) { | |
590 | dp->flags |= DRV_FLG_DIRTY; | |
591 | bg_setstat(handle_cpm_drv_to, 1); | |
592 | } | |
593 | ||
594 | if (buserr) { | |
595 | /* Bus timeout. how can this happen? */ | |
596 | rc = 0x03; | |
597 | } | |
598 | ||
599 | /* send result*/ | |
600 | msg_cpm_result(subf, rc, res); | |
601 | } | |
602 | ||
603 | ||
604 | const FLASH struct msg_item z80_messages[] = | |
605 | { | |
606 | { 0, /* fct nr. */ | |
607 | 1, 3, /* sub fct nr. from, to */ | |
608 | do_msg_ini_memfifo}, | |
609 | { 1, | |
610 | 1, 1, | |
611 | do_msg_char_out}, | |
612 | { 1, | |
613 | 2, 2, | |
614 | do_msg_echo}, | |
615 | { 2, | |
616 | 0, 0, | |
617 | do_msg_cpm_login}, | |
618 | { 2, | |
619 | 1, 2, | |
620 | do_msg_cpm_rw}, | |
621 | { 3, | |
622 | 1, 1, | |
623 | do_msg_get_timer}, | |
624 | { 3, | |
625 | 2, 3, /* 2: get, 3: set time and date */ | |
626 | do_msg_get_set_time}, | |
627 | { 0xff, /* end mark */ | |
628 | 0, 0, | |
629 | 0}, | |
630 | ||
631 | }; | |
632 | ||
633 | ||
634 | ||
635 | ||
636 | void do_message(int len, uint8_t *msg) | |
637 | { | |
638 | uint8_t fct, sub_fct; | |
639 | int_fast8_t i = 0; | |
640 | ||
641 | if (len >= 2) { | |
642 | fct = *msg++; | |
643 | sub_fct = *msg++; | |
644 | len -= 2; | |
645 | ||
646 | while (fct != z80_messages[i].fct) { | |
647 | if (z80_messages[i].fct == 0xff) { | |
648 | DBG_P(1, "do_message: Unknown function: %i, %i\n", | |
649 | fct, sub_fct); | |
650 | return; /* TODO: unknown message # */ | |
651 | } | |
652 | ||
653 | ++i; | |
654 | } | |
655 | ||
656 | while (fct == z80_messages[i].fct) { | |
657 | if (sub_fct >= z80_messages[i].sub_min && | |
658 | sub_fct <= z80_messages[i].sub_max ) | |
659 | break; | |
660 | ++i; | |
661 | } | |
662 | ||
663 | if (z80_messages[i].fct != fct) { | |
664 | DBG_P(1, "do_message: Unknown sub function: %i, %i\n", | |
665 | fct, sub_fct); | |
666 | return; /* TODO: unknown message sub# */ | |
667 | } | |
668 | ||
669 | (z80_messages[i].func)(sub_fct, len, msg); | |
670 | ||
671 | ||
672 | } else { | |
673 | /* TODO: error */ | |
674 | DBG_P(1, "do_message: to few arguments (%i); this shouldn't happen!\n", len); | |
675 | } | |
676 | } | |
677 | ||
678 | ||
679 | ||
680 | #define CTRBUF_LEN 256 | |
681 | ||
682 | void check_msg_fifo(void) | |
683 | { | |
684 | int ch; | |
685 | static int_fast8_t state; | |
686 | static int msglen,idx; | |
687 | static uint8_t buffer[CTRBUF_LEN]; | |
688 | ||
689 | while ((ch = z80_memfifo_getc(fifo_msgin)) >= 0) { | |
690 | switch (state) { | |
691 | case 0: /* wait for start of message */ | |
692 | if (ch == 0xAE) { /* TODO: magic number */ | |
693 | msglen = 0; | |
694 | idx = 0; | |
695 | state = 1; | |
696 | } | |
697 | break; | |
698 | case 1: /* get msg len */ | |
699 | if (ch > 0 && ch <= CTRBUF_LEN) { | |
700 | msglen = ch; | |
701 | state = 2; | |
702 | } else | |
703 | state = 0; | |
704 | break; | |
705 | case 2: /* get message */ | |
706 | buffer[idx++] = ch; | |
707 | if (idx == msglen) { | |
708 | do_message(msglen, buffer); | |
709 | state = 0; | |
710 | } | |
711 | break; | |
712 | } | |
713 | } | |
714 | } | |
715 | ||
716 | ||
717 | int msg_handling(int state) | |
718 | { | |
719 | bool pending; | |
720 | ||
721 | ATOMIC_BLOCK(ATOMIC_FORCEON) { | |
722 | pending = (Stat & S_MSG_PENDING) != 0; | |
723 | Stat &= ~S_MSG_PENDING; | |
724 | } | |
725 | ||
726 | if (pending) { | |
727 | uint8_t init_request; | |
728 | z80_bus_cmd(Request); | |
729 | init_request = z80_read(0x43); | |
730 | z80_bus_cmd(Release); | |
731 | if ( init_request != 0) { | |
732 | /* Get address of fifo 0 */ | |
733 | z80_bus_cmd(Request); | |
734 | uint32_t fifo_addr = z80_read(0x40) + | |
735 | ((uint16_t) z80_read(0x40+1) << 8) + | |
736 | ((uint32_t) z80_read(0x40+2) << 16); | |
737 | z80_write(0x43, 0); | |
738 | z80_bus_cmd(Release); | |
739 | ||
740 | if (fifo_addr != 0) { | |
741 | z80_memfifo_init(fifo_msgin, fifo_addr); | |
742 | state = 1; | |
743 | } else | |
744 | state = 0; | |
745 | ||
746 | } else { | |
747 | check_msg_fifo(); | |
748 | } | |
749 | } | |
750 | ||
751 | return state; | |
752 | } | |
753 | ||
754 | ||
755 | static int handle_msg_handling; | |
756 | ||
757 | void setup_z180_serv(void) | |
758 | { | |
759 | ||
760 | handle_msg_handling = bg_register(msg_handling, 0); | |
761 | handle_cpm_drv_to = bg_register(cpm_drv_to, 0); | |
762 | } | |
763 | ||
764 | void restart_z180_serv(void) | |
765 | { | |
766 | z80_bus_cmd(Request); | |
767 | z80_memset(0x40, 0, 4); | |
768 | z80_bus_cmd(Release); | |
769 | ||
770 | for (int i = 0; i < NUM_FIFOS; i++) | |
771 | z80_memfifo_init(i, 0); | |
772 | bg_setstat(handle_msg_handling, 0); | |
773 | ||
774 | } | |
775 | ||
776 | #if 0 | |
777 | /*--------------------------------------------------------------------------*/ | |
778 | ||
779 | const FLASH uint8_t iniprog[] = { | |
780 | 0xAF, // xor a | |
781 | 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh | |
782 | 0x3E, 0x30, // ld a,030h | |
783 | 0xED, 0x39, 0x32 //out0 (dcntl),a ;0 mem, max i/0 wait states | |
784 | }; | |
785 | ||
786 | const FLASH uint8_t sertest[] = { | |
787 | 0xAF, // xor a | |
788 | 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh | |
789 | 0x3E, 0x30, // ld a,030h | |
790 | 0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states | |
791 | 0x3E, 0x80, // ld a,M_MPBT ;no MP, PS=10, DR=16, SS=0 | |
792 | 0xED, 0x39, 0x03, // out0 (cntlb1),a | |
793 | 0x3E, 0x64, // ld a,M_RE + M_TE + M_MOD2 ; | |
794 | 0xED, 0x39, 0x01, // out0 (cntla1),a | |
795 | 0x3E, 0x00, // ld a,0 | |
796 | 0xED, 0x39, 0x05, // out0 (stat1),a ;Enable rx interrupts | |
797 | 0xED, 0x38, 0x05, //l0:in0 a,(stat1) | |
798 | 0xE6, 0x80, // and 80h | |
799 | 0x28, 0xF9, // jr z,l0 | |
800 | 0xED, 0x00, 0x09, // in0 b,(rdr1) | |
801 | 0xED, 0x38, 0x05, //l1:in0 a,(stat1) | |
802 | 0xE6, 0x02, // and 02h | |
803 | 0x28, 0xF9, // jr z,l1 | |
804 | 0xED, 0x01, 0x07, // out0 (tdr1),b | |
805 | 0x18, 0xEA, // jr l0 | |
806 | }; | |
807 | ||
808 | const FLASH uint8_t test1[] = { | |
809 | 0xAF, // xor a | |
810 | 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh | |
811 | 0x3E, 0x30, // ld a,030h | |
812 | 0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states | |
813 | 0x21, 0x1E, 0x00, // ld hl,dmclrt ;load DMA registers | |
814 | 0x06, 0x08, // ld b,dmct_e-dmclrt | |
815 | 0x0E, 0x20, // ld c,sar0l | |
816 | 0xED, 0x93, // otimr | |
817 | 0x3E, 0xC3, // ld a,0c3h ;dst +1, src +1, burst | |
818 | 0xED, 0x39, 0x31, // out0 (dmode),a ; | |
819 | 0x3E, 0x62, // ld a,062h ;enable dma0, | |
820 | 0xED, 0x39, 0x30, //cl_1: out0 (dstat),a ;copy 64k | |
821 | 0x18, 0xFB, // jr cl_1 ; | |
822 | 0x00, 0x00, //dmclrt: dw 0 ;src (inc) | |
823 | 0x00, // db 0 ;src | |
824 | 0x00, 0x00, // dw 0 ;dst (inc), | |
825 | 0x00, // db 0 ;dst | |
826 | 0x00, 0x00, // dw 0 ;count (64k) | |
827 | }; | |
828 | #endif |