]> cloudbase.mooo.com Git - z180-stamp.git/blob - avr/z180-serv.c
projects / z180-stamp.git / blob
? search:


929cd97148472d060afc2675f7bcdc4ae6bbf602
[z180-stamp.git] / avr / z180-serv.c
1 /*
2 * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7 #include "common.h"
8 #include <stdlib.h>
9 #include <string.h>
10 #include <stdbool.h>
11 #include <util/atomic.h>
12
13 #include "background.h"
14 #include "env.h"
15 #include "ff.h"
16 #include "serial.h"
17 #include "z80-if.h"
18 #include "debug.h"
19 #include "print-utils.h"
20 #include "z180-serv.h"
21 #include "timer.h"
22 #include "time.h"
23 #include "bcd.h"
24 #include "rtc.h"
25
26 #define DEBUG_CPM_SDIO 0 /* set to 1 to debug */
27
28 #define debug_cpmsd(fmt, args...) \
29 debug_cond(DEBUG_CPM_SDIO, fmt, ##args)
30
31
32 /*--------------------------------------------------------------------------*/
33
34 struct msg_item {
35 uint8_t fct;
36 uint8_t sub_min, sub_max;
37 void (*func)(uint8_t, int, uint8_t *);
38 };
39
40 uint32_t msg_to_addr(uint8_t *msg)
41 {
42 union {
43 uint32_t as32;
44 uint8_t as8[4];
45 } addr;
46
47 addr.as8[0] = msg[0];
48 addr.as8[1] = msg[1];
49 addr.as8[2] = msg[2];
50 addr.as8[3] = 0;
51
52 return addr.as32;
53 }
54
55
56 static int msg_xmit_header(uint8_t func, uint8_t subf, int len)
57 {
58 z80_memfifo_putc(fifo_msgout, 0xAE);
59 z80_memfifo_putc(fifo_msgout, len+2);
60 z80_memfifo_putc(fifo_msgout, func);
61 z80_memfifo_putc(fifo_msgout, subf);
62
63 return 0;
64 }
65
66 int msg_xmit(uint8_t func, uint8_t subf, int len, uint8_t *msg)
67 {
68 msg_xmit_header(func, subf, len);
69 while (len--)
70 z80_memfifo_putc(fifo_msgout, *msg++);
71
72 return 0;
73 }
74
75 void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg)
76 {
77 (void)len;
78
79 z80_memfifo_init(subf, msg_to_addr(msg));
80 }
81
82
83 void do_msg_char_out(uint8_t subf, int len, uint8_t * msg)
84 {
85 (void)subf;
86
87 while (len--)
88 putchar(*msg++);
89 }
90
91 /* echo message */
92 void do_msg_echo(uint8_t subf, int len, uint8_t * msg)
93 {
94 (void)subf;
95
96 /* send re-echo */
97 msg_xmit(1, 3, len, msg);
98 }
99
100 /* get timer */
101 void do_msg_get_timer(uint8_t subf, int len, uint8_t * msg)
102 {
103 uint32_t time_ms = (len >= 4) ? *(uint32_t *) msg : 0;
104
105 time_ms = get_timer(time_ms);
106 msg_xmit(3, subf, sizeof(time_ms), (uint8_t *) &time_ms);
107 }
108
109 /* ---------------------------------------------------------------------------*/
110
111 #define CPM_DAY_OFFSET ((1978-1900) * 365 + 19) /* 19 leap years */
112
113 /*
114 * Convert CP/M time stamp to a broken-down time structure
115 *
116 */
117 int mk_date_time (int len, uint8_t *msg, struct tm *tmp)
118 {
119 time_t stamp;
120
121 if (len != 5)
122 return -1;
123
124 /* days since 2000-01-01 */
125 long days = msg[3] + (msg[4] << 8) - 8036;
126
127 if (days < 0)
128 return -1;
129
130 stamp = days * ONE_DAY;
131 stamp += bcd2bin(msg[0]);
132 stamp += bcd2bin(msg[1]) * 60 ;
133 stamp += bcd2bin(msg[2]) * 3600L;
134 gmtime_r(&stamp, tmp);
135 return 0;
136 }
137
138 void mk_cpm_time(struct tm *tmp, uint8_t cpm_time[5])
139 {
140 uint16_t days = 1;
141 uint_fast8_t leap=2;
142
143 for (int year=78; year < tmp->tm_year; year++) {
144 days = days + 365 + (leap == 0);
145 leap = (leap+1)%4;
146 }
147 days += tmp->tm_yday;
148
149 cpm_time[0] = bin2bcd(tmp->tm_sec);
150 cpm_time[1] = bin2bcd(tmp->tm_min);
151 cpm_time[2] = bin2bcd(tmp->tm_hour);
152 cpm_time[3] = days;
153 cpm_time[4] = days >> 8;
154 }
155
156 /* get/set cp/m time */
157 void do_msg_get_set_time(uint8_t subf, int len, uint8_t * msg)
158 {
159 struct tm t;
160 uint8_t cpm_time[5];
161 int rc;
162
163 memset(cpm_time, 0, ARRAY_SIZE(cpm_time));
164
165 switch (subf) {
166 case 3: /* set date & time */
167 /* initialize t with current time */
168 rc = rtc_get (&t);
169
170 if (rc == 0) {
171 /* insert new date & time */
172 if (mk_date_time (len, msg, &t) != 0) {
173 my_puts_P(PSTR("## set_time: Bad date format\n"));
174 break;
175 }
176
177 time_t time;
178 time = mk_gmtime(&t);
179 gmtime_r(&time, &t);
180
181 /* and write to RTC */
182 rc = rtc_set (&t);
183 if(rc)
184 my_puts_P(PSTR("## set_time: Set date failed\n"));
185 } else {
186 my_puts_P(PSTR("## set_time: Get date failed\n"));
187 }
188 /* FALL TROUGH */
189 case 2: /* get date & time */
190 rc = rtc_get (&t);
191
192 if (rc) {
193 my_puts_P(PSTR("## get_time: Get date failed\n"));
194 break;
195 }
196
197 time_t time;
198 time = mk_gmtime(&t);
199 //mktime(&t);
200 gmtime_r(&time, &t);
201
202
203 mk_cpm_time(&t, cpm_time);
204 break;
205 }
206
207 msg_xmit(3, subf, sizeof(cpm_time), cpm_time);
208 }
209
210 /* ---------------------------------------------------------------------------*/
211
212 #define MAX_DRIVE 4
213 #define BLOCK_SIZE 512
214 #define TPA_BASE 0x10000
215 #define COMMON_BASE 0xC000
216
217 struct cpm_drive_s {
218 uint8_t drv;
219 uint8_t device;
220 char *img_name;
221 bool dirty;
222 FIL fd;
223 };
224
225 static uint8_t disk_buffer[BLOCK_SIZE];
226 static struct cpm_drive_s drv_table[MAX_DRIVE];
227 static int handle_cpm_drv_to;
228
229 #define f_dirty(fp) ((fp)->fs->wflag != 0)
230
231
232 int cpm_drv_to(int state)
233 {
234 static uint32_t ts;
235
236 switch(state) {
237 case 0:
238 break;
239
240 case 1:
241 ts = get_timer(0);
242 state = 2;
243 break;
244
245 case 2:
246 if (get_timer(ts) > 1000) {
247 for (uint_fast8_t i=0; i < MAX_DRIVE; i++) {
248 // if (&drv_table[i].fd && f_dirty(&drv_table[i].fd)) {
249 if (drv_table[i].dirty) {
250 f_sync(&drv_table[i].fd);
251 drv_table[i].dirty = false;
252 debug_cpmsd("## %7lu f_sync: %c:\n", get_timer(0), i+'A');
253 }
254 }
255 state = 0;
256 }
257 }
258 return state;
259 }
260
261
262 void msg_cpm_result(uint8_t subf, uint8_t rc, int res)
263 {
264 uint8_t result_msg[3];
265
266 if (res)
267 rc |= 0x80;
268
269 result_msg[0] = rc;
270 result_msg[1] = res;
271 result_msg[2] = res >> 8;
272
273 if (rc) {
274 debug_cpmsd("###%7lu error rc: %.02x, res: %d\n", get_timer(0), rc, res);
275 }
276
277 msg_xmit(2, subf, sizeof(result_msg), result_msg);
278 }
279
280 /*
281 db 2 ; disk command
282 ds 1 ; subcommand (login/read/write)
283 ds 1 ; @adrv (8 bits) +0
284 ds 1 ; @rdrv (8 bits) +1
285 ds 3 ; @xdph (24 bits) +2
286 */
287
288 void do_msg_cpm_login(uint8_t subf, int len, uint8_t * msg)
289 {
290
291 FRESULT res = 0;
292 uint8_t drv;
293 char *np;
294
295 (void)subf;
296
297 if (len != 5) { /* TODO: check adrv, rdrv */
298 return msg_cpm_result(subf, 0x01, res);
299 }
300
301 debug_cpmsd("\n## %7lu login: %c:\n", get_timer(0), msg[0]+'A');
302
303
304 drv = msg[0];
305 if ( drv>= MAX_DRIVE) {
306 return msg_cpm_result(subf, 0x02, res);
307 }
308
309 /*
310 uint32_t dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2];
311 */
312
313 if (drv_table[drv].img_name != NULL) {
314 debug_cpmsd("## %7lu close: '%s'\n", get_timer(0), drv_table[drv].img_name);
315 f_close(&drv_table[drv].fd);
316 drv_table[drv].dirty = false;
317 free(drv_table[drv].img_name);
318 drv_table[drv].img_name = NULL;
319 }
320
321 strcpy_P((char *)disk_buffer, PSTR("dsk0"));
322 disk_buffer[3] = msg[0] + '0';
323 if (((np = getenv((char*)disk_buffer)) == NULL) ||
324 ((drv_table[drv].img_name = strdup(np)) == NULL)) {
325 return msg_cpm_result(subf, 0x03, res);
326 }
327
328
329 res = f_open(&drv_table[drv].fd, drv_table[drv].img_name,
330 FA_WRITE | FA_READ);
331
332 debug_cpmsd("## %7lu open: '%s', (env: '%s'), res: %d\n", get_timer(0),
333 drv_table[drv].img_name, disk_buffer, res);
334
335 /* send result*/
336 msg_cpm_result(subf, 0x00, res);
337 }
338
339
340 /*
341 db 2 ; disk command
342 ds 1 ; subcommand (login/read/write)
343 ds 1 ; @adrv (8 bits) +0
344 ds 1 ; @rdrv (8 bits) +1
345 ds 2 ; @trk (16 bits) +2
346 ds 2 ; @sect(16 bits) +4
347 ds 1 ; @cnt (8 bits) +6
348 ds 3 ; phys. transfer addr +7
349 */
350
351 #define ADRV 0
352 #define RDRV 1
353 #define TRK 2
354 #define SEC 4
355 #define CNT 6
356 #define ADDR 7
357
358 void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg)
359 {
360 uint8_t drv;
361 uint32_t addr;
362 uint32_t pos;
363 uint8_t secs;
364 bool dowrite = (subf == 2);
365 FRESULT res = 0;
366 uint8_t rc = 0;
367 bool buserr = 0;
368
369 if (len != 10) { /* TODO: check adrv, rdrv */
370 return msg_cpm_result(subf, 0x01, res);
371 }
372
373 drv = msg[ADRV];
374 if ( drv>= MAX_DRIVE) {
375 return msg_cpm_result(subf, 0x02, res);
376 }
377
378 secs = msg[CNT];
379 addr = ((uint32_t)msg[ADDR+2] << 16) + ((uint16_t)msg[ADDR+1] << 8) + msg[ADDR];
380
381
382 /* TODO: tracks per sector from dpb */
383 pos = (((uint16_t)(msg[TRK+1] << 8) + msg[TRK]) * 8
384 + ((uint32_t)(msg[SEC+1] << 8) + msg[SEC])) * BLOCK_SIZE;
385
386 debug_cpmsd("## %7lu cpm_rw: %s %c: trk:%4d, sec: %d, pos: %.8lx, secs: %2d, "
387 "addr: %.5lx\n", get_timer(0), dowrite ? "write" : " read",
388 msg[ADRV]+'A', ((uint16_t)(msg[TRK+1] << 8) + msg[TRK]), msg[SEC],
389 pos, msg[CNT], addr);
390
391 res = f_lseek(&drv_table[drv].fd, pos);
392 while (!res && secs--) {
393 unsigned int cnt, br;
394
395 /* check bank boundary crossing */
396 cnt = 0;
397 if (addr < (TPA_BASE + COMMON_BASE) &&
398 (addr + BLOCK_SIZE) > (TPA_BASE + COMMON_BASE)) {
399 cnt = (TPA_BASE + COMMON_BASE) - addr;
400 }
401
402 if (cnt) {
403 debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr, cnt);
404 debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr+cnt-TPA_BASE, BLOCK_SIZE-cnt);
405 }
406
407 if (dowrite) {
408 if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
409 buserr = 1;
410 break;
411 } else {
412 if (cnt) {
413 z80_read_block(disk_buffer, addr, cnt);
414 addr = addr + cnt - TPA_BASE;
415 }
416 z80_read_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
417 z80_bus_cmd(Release);
418 }
419 res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
420 } else {
421 res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
422 if (res == FR_OK && br == BLOCK_SIZE) {
423 if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
424 buserr = 1;
425 break;
426 } else {
427 if (cnt) {
428 z80_write_block(disk_buffer, addr, cnt);
429 addr = addr + cnt - TPA_BASE;
430 }
431 z80_write_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
432 z80_bus_cmd(Release);
433 }
434 }
435 }
436
437 if (br != BLOCK_SIZE) {
438 debug_cpmsd("## %7lu f_read res: %d, bytes rd/wr: %u\n", get_timer(0), res, br);
439 dump_ram(disk_buffer, 0, 64, "Read Data");
440 res = -1;
441 }
442
443 addr += BLOCK_SIZE;
444 }
445
446 if (dowrite && !res) {
447 // res = f_sync(&drv_table[drv].fd);
448 drv_table[drv].dirty = true;
449 bg_setstat(handle_cpm_drv_to, 1);
450 }
451
452
453 if (buserr) {
454 debug_cpmsd("Bus timeout\n");
455 rc = 0x03;
456 }
457
458 /* send result*/
459 msg_cpm_result(subf, rc, res);
460 }
461
462
463 const FLASH struct msg_item z80_messages[] =
464 {
465 { 0, /* fct nr. */
466 1, 3, /* sub fct nr. from, to */
467 do_msg_ini_memfifo},
468 { 1,
469 1, 1,
470 do_msg_char_out},
471 { 1,
472 2, 2,
473 do_msg_echo},
474 { 2,
475 0, 0,
476 do_msg_cpm_login},
477 { 2,
478 1, 2,
479 do_msg_cpm_rw},
480 { 3,
481 1, 1,
482 do_msg_get_timer},
483 { 3,
484 2, 3, /* 2: get, 3: set time and date */
485 do_msg_get_set_time},
486 { 0xff, /* end mark */
487 0, 0,
488 0},
489
490 };
491
492
493
494
495 void do_message(int len, uint8_t *msg)
496 {
497 uint8_t fct, sub_fct;
498 int_fast8_t i = 0;
499
500 if (len >= 2) {
501 fct = *msg++;
502 sub_fct = *msg++;
503 len -= 2;
504
505 while (fct != z80_messages[i].fct) {
506 if (z80_messages[i].fct == 0xff) {
507 DBG_P(1, "do_message: Unknown function: %i, %i\n",
508 fct, sub_fct);
509 return; /* TODO: unknown message # */
510 }
511
512 ++i;
513 }
514
515 while (fct == z80_messages[i].fct) {
516 if (sub_fct >= z80_messages[i].sub_min &&
517 sub_fct <= z80_messages[i].sub_max )
518 break;
519 ++i;
520 }
521
522 if (z80_messages[i].fct != fct) {
523 DBG_P(1, "do_message: Unknown sub function: %i, %i\n",
524 fct, sub_fct);
525 return; /* TODO: unknown message sub# */
526 }
527
528 (z80_messages[i].func)(sub_fct, len, msg);
529
530
531 } else {
532 /* TODO: error */
533 DBG_P(1, "do_message: to few arguments (%i); this shouldn't happen!\n", len);
534 }
535 }
536
537
538
539 #define CTRBUF_LEN 256
540
541 void check_msg_fifo(void)
542 {
543 int ch;
544 static int_fast8_t state;
545 static int msglen,idx;
546 static uint8_t buffer[CTRBUF_LEN];
547
548 while ((ch = z80_memfifo_getc(fifo_msgin)) >= 0) {
549 switch (state) {
550 case 0: /* wait for start of message */
551 if (ch == 0xAE) { /* TODO: magic number */
552 msglen = 0;
553 idx = 0;
554 state = 1;
555 }
556 break;
557 case 1: /* get msg len */
558 if (ch > 0 && ch <= CTRBUF_LEN) {
559 msglen = ch;
560 state = 2;
561 } else
562 state = 0;
563 break;
564 case 2: /* get message */
565 buffer[idx++] = ch;
566 if (idx == msglen) {
567 do_message(msglen, buffer);
568 state = 0;
569 }
570 break;
571 }
572 }
573 }
574
575
576 int msg_handling(int state)
577 {
578 bool pending;
579
580 ATOMIC_BLOCK(ATOMIC_FORCEON) {
581 pending = (Stat & S_MSG_PENDING) != 0;
582 Stat &= ~S_MSG_PENDING;
583 }
584 /*
585 * TODO: if pending but no message chr --> special condition. ie init,...
586 */
587
588 if (pending) {
589 switch (state) {
590 case 0: /* need init */
591 /* Get address of fifo_list */
592 z80_bus_cmd(Request);
593 uint32_t fifo_list = z80_read(0x40) +
594 ((uint16_t) z80_read(0x41) << 8) +
595 ((uint32_t) z80_read(0x42) << 16);
596 z80_bus_cmd(Release);
597 if (fifo_list != 0) {
598 /* Get address of fifo 0 */
599 z80_bus_cmd(Request);
600 uint32_t fifo_addr = z80_read(fifo_list) +
601 ((uint16_t) z80_read(fifo_list+1) << 8) +
602 ((uint32_t) z80_read(fifo_list+2) << 16);
603 z80_bus_cmd(Release);
604 if (fifo_addr != 0) {
605 z80_memfifo_init(fifo_msgin, fifo_addr);
606 state = 1;
607 }
608 }
609 break;
610 case 1: /* awaiting messages */
611 check_msg_fifo();
612 break;
613 }
614 }
615
616 return state;
617 }
618
619
620 static int handle_msg_handling;
621
622 void setup_z180_serv(void)
623 {
624
625 handle_msg_handling = bg_register(msg_handling, 0);
626 handle_cpm_drv_to = bg_register(cpm_drv_to, 0);
627 }
628
629 void restart_z180_serv(void)
630 {
631 z80_bus_cmd(Request);
632 z80_write(0x40, 0);
633 z80_write(0x41, 0);
634 z80_write(0x42, 0);
635 z80_bus_cmd(Release);
636
637 for (int i = 0; i < NUM_FIFOS; i++)
638 z80_memfifo_init(i, 0);
639 bg_setstat(handle_msg_handling, 0);
640
641 }
642
643 #if 0
644 /*--------------------------------------------------------------------------*/
645
646 const FLASH uint8_t iniprog[] = {
647 0xAF, // xor a
648 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
649 0x3E, 0x30, // ld a,030h
650 0xED, 0x39, 0x32 //out0 (dcntl),a ;0 mem, max i/0 wait states
651 };
652
653 const FLASH uint8_t sertest[] = {
654 0xAF, // xor a
655 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
656 0x3E, 0x30, // ld a,030h
657 0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states
658 0x3E, 0x80, // ld a,M_MPBT ;no MP, PS=10, DR=16, SS=0
659 0xED, 0x39, 0x03, // out0 (cntlb1),a
660 0x3E, 0x64, // ld a,M_RE + M_TE + M_MOD2 ;
661 0xED, 0x39, 0x01, // out0 (cntla1),a
662 0x3E, 0x00, // ld a,0
663 0xED, 0x39, 0x05, // out0 (stat1),a ;Enable rx interrupts
664 0xED, 0x38, 0x05, //l0:in0 a,(stat1)
665 0xE6, 0x80, // and 80h
666 0x28, 0xF9, // jr z,l0
667 0xED, 0x00, 0x09, // in0 b,(rdr1)
668 0xED, 0x38, 0x05, //l1:in0 a,(stat1)
669 0xE6, 0x02, // and 02h
670 0x28, 0xF9, // jr z,l1
671 0xED, 0x01, 0x07, // out0 (tdr1),b
672 0x18, 0xEA, // jr l0
673 };
674
675 const FLASH uint8_t test1[] = {
676 0xAF, // xor a
677 0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
678 0x3E, 0x30, // ld a,030h
679 0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states
680 0x21, 0x1E, 0x00, // ld hl,dmclrt ;load DMA registers
681 0x06, 0x08, // ld b,dmct_e-dmclrt
682 0x0E, 0x20, // ld c,sar0l
683 0xED, 0x93, // otimr
684 0x3E, 0xC3, // ld a,0c3h ;dst +1, src +1, burst
685 0xED, 0x39, 0x31, // out0 (dmode),a ;
686 0x3E, 0x62, // ld a,062h ;enable dma0,
687 0xED, 0x39, 0x30, //cl_1: out0 (dstat),a ;copy 64k
688 0x18, 0xFB, // jr cl_1 ;
689 0x00, 0x00, //dmclrt: dw 0 ;src (inc)
690 0x00, // db 0 ;src
691 0x00, 0x00, // dw 0 ;dst (inc),
692 0x00, // db 0 ;dst
693 0x00, 0x00, // dw 0 ;count (64k)
694 };
695 #endif
Z180 Stamp Monitor