1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2000-2004
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7 /*
8 * Serial up- and download support
9 */
10 #include <common.h>
11 #include <command.h>
12 #include <console.h>
13 #include <cpu_func.h>
14 #include <efi_loader.h>
15 #include <env.h>
16 #include <exports.h>
17 #include <flash.h>
18 #include <image.h>
19 #include <lmb.h>
20 #include <mapmem.h>
21 #include <net.h>
22 #include <s_record.h>
23 #include <serial.h>
24 #include <xyzModem.h>
25 #include <asm/cache.h>
26 #include <asm/global_data.h>
27 #include <linux/delay.h>
28
29 DECLARE_GLOBAL_DATA_PTR;
30
31 #if defined(CONFIG_CMD_LOADB)
32 static ulong load_serial_ymodem(ulong offset, int mode);
33 #endif
34
35 #if defined(CONFIG_CMD_LOADS)
36 static ulong load_serial(long offset);
37 static int read_record(char *buf, ulong len);
38 # if defined(CONFIG_CMD_SAVES)
39 static int save_serial(ulong offset, ulong size);
40 static int write_record(char *buf);
41 #endif
42
43 static int do_echo = 1;
44 #endif
45
46 /* -------------------------------------------------------------------- */
47
48 #if defined(CONFIG_CMD_LOADS)
do_load_serial(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])49 static int do_load_serial(struct cmd_tbl *cmdtp, int flag, int argc,
50 char *const argv[])
51 {
52 long offset = 0;
53 ulong addr;
54 int i;
55 char *env_echo;
56 int rcode = 0;
57 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
58 int load_baudrate, current_baudrate;
59
60 load_baudrate = current_baudrate = gd->baudrate;
61 #endif
62
63 env_echo = env_get("loads_echo");
64 if (env_echo && *env_echo == '1')
65 do_echo = 1;
66 else
67 do_echo = 0;
68
69 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
70 if (argc >= 2) {
71 offset = simple_strtol(argv[1], NULL, 16);
72 }
73 if (argc == 3) {
74 load_baudrate = (int)dectoul(argv[2], NULL);
75
76 /* default to current baudrate */
77 if (load_baudrate == 0)
78 load_baudrate = current_baudrate;
79 }
80 if (load_baudrate != current_baudrate) {
81 printf("## Switch baudrate to %d bps and press ENTER ...\n",
82 load_baudrate);
83 udelay(50000);
84 gd->baudrate = load_baudrate;
85 serial_setbrg();
86 udelay(50000);
87 for (;;) {
88 if (getchar() == '\r')
89 break;
90 }
91 }
92 #else /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
93 if (argc == 2) {
94 offset = simple_strtol(argv[1], NULL, 16);
95 }
96 #endif /* CONFIG_SYS_LOADS_BAUD_CHANGE */
97
98 printf("## Ready for S-Record download ...\n");
99
100 addr = load_serial(offset);
101
102 /*
103 * Gather any trailing characters (for instance, the ^D which
104 * is sent by 'cu' after sending a file), and give the
105 * box some time (100 * 1 ms)
106 */
107 for (i=0; i<100; ++i) {
108 if (tstc()) {
109 getchar();
110 }
111 udelay(1000);
112 }
113
114 if (addr == ~0) {
115 printf("## S-Record download aborted\n");
116 rcode = 1;
117 } else {
118 printf("## Start Addr = 0x%08lX\n", addr);
119 image_load_addr = addr;
120 }
121
122 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
123 if (load_baudrate != current_baudrate) {
124 printf("## Switch baudrate to %d bps and press ESC ...\n",
125 current_baudrate);
126 udelay(50000);
127 gd->baudrate = current_baudrate;
128 serial_setbrg();
129 udelay(50000);
130 for (;;) {
131 if (getchar() == 0x1B) /* ESC */
132 break;
133 }
134 }
135 #endif
136 return rcode;
137 }
138
load_serial(long offset)139 static ulong load_serial(long offset)
140 {
141 struct lmb lmb;
142 char record[SREC_MAXRECLEN + 1]; /* buffer for one S-Record */
143 char binbuf[SREC_MAXBINLEN]; /* buffer for binary data */
144 int binlen; /* no. of data bytes in S-Rec. */
145 int type; /* return code for record type */
146 ulong addr; /* load address from S-Record */
147 ulong size; /* number of bytes transferred */
148 ulong store_addr;
149 ulong start_addr = ~0;
150 ulong end_addr = 0;
151 int line_count = 0;
152 long ret;
153
154 lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
155
156 while (read_record(record, SREC_MAXRECLEN + 1) >= 0) {
157 type = srec_decode(record, &binlen, &addr, binbuf);
158
159 if (type < 0) {
160 return (~0); /* Invalid S-Record */
161 }
162
163 switch (type) {
164 case SREC_DATA2:
165 case SREC_DATA3:
166 case SREC_DATA4:
167 store_addr = addr + offset;
168 #ifdef CONFIG_MTD_NOR_FLASH
169 if (addr2info(store_addr)) {
170 int rc;
171
172 rc = flash_write((char *)binbuf,store_addr,binlen);
173 if (rc != 0) {
174 flash_perror(rc);
175 return (~0);
176 }
177 } else
178 #endif
179 {
180 ret = lmb_reserve(&lmb, store_addr, binlen);
181 if (ret) {
182 printf("\nCannot overwrite reserved area (%08lx..%08lx)\n",
183 store_addr, store_addr + binlen);
184 return ret;
185 }
186 memcpy((char *)(store_addr), binbuf, binlen);
187 lmb_free(&lmb, store_addr, binlen);
188 }
189 if ((store_addr) < start_addr)
190 start_addr = store_addr;
191 if ((store_addr + binlen - 1) > end_addr)
192 end_addr = store_addr + binlen - 1;
193 break;
194 case SREC_END2:
195 case SREC_END3:
196 case SREC_END4:
197 udelay(10000);
198 size = end_addr - start_addr + 1;
199 printf("\n"
200 "## First Load Addr = 0x%08lX\n"
201 "## Last Load Addr = 0x%08lX\n"
202 "## Total Size = 0x%08lX = %ld Bytes\n",
203 start_addr, end_addr, size, size
204 );
205 flush_cache(start_addr, size);
206 env_set_hex("filesize", size);
207 return (addr);
208 case SREC_START:
209 break;
210 default:
211 break;
212 }
213 if (!do_echo) { /* print a '.' every 100 lines */
214 if ((++line_count % 100) == 0)
215 putc('.');
216 }
217 }
218
219 return (~0); /* Download aborted */
220 }
221
read_record(char * buf,ulong len)222 static int read_record(char *buf, ulong len)
223 {
224 char *p;
225 char c;
226
227 --len; /* always leave room for terminating '\0' byte */
228
229 for (p=buf; p < buf+len; ++p) {
230 c = getchar(); /* read character */
231 if (do_echo)
232 putc(c); /* ... and echo it */
233
234 switch (c) {
235 case '\r':
236 case '\n':
237 *p = '\0';
238 return (p - buf);
239 case '\0':
240 case 0x03: /* ^C - Control C */
241 return (-1);
242 default:
243 *p = c;
244 }
245
246 /* Check for the console hangup (if any different from serial) */
247 if (gd->jt->getc != getchar) {
248 if (ctrlc())
249 return (-1);
250 }
251 }
252
253 /* line too long - truncate */
254 *p = '\0';
255 return (p - buf);
256 }
257
258 #if defined(CONFIG_CMD_SAVES)
259
do_save_serial(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])260 int do_save_serial(struct cmd_tbl *cmdtp, int flag, int argc,
261 char *const argv[])
262 {
263 ulong offset = 0;
264 ulong size = 0;
265 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
266 int save_baudrate, current_baudrate;
267
268 save_baudrate = current_baudrate = gd->baudrate;
269 #endif
270
271 if (argc >= 2) {
272 offset = hextoul(argv[1], NULL);
273 }
274 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
275 if (argc >= 3) {
276 size = hextoul(argv[2], NULL);
277 }
278 if (argc == 4) {
279 save_baudrate = (int)dectoul(argv[3], NULL);
280
281 /* default to current baudrate */
282 if (save_baudrate == 0)
283 save_baudrate = current_baudrate;
284 }
285 if (save_baudrate != current_baudrate) {
286 printf("## Switch baudrate to %d bps and press ENTER ...\n",
287 save_baudrate);
288 udelay(50000);
289 gd->baudrate = save_baudrate;
290 serial_setbrg();
291 udelay(50000);
292 for (;;) {
293 if (getchar() == '\r')
294 break;
295 }
296 }
297 #else /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
298 if (argc == 3) {
299 size = hextoul(argv[2], NULL);
300 }
301 #endif /* CONFIG_SYS_LOADS_BAUD_CHANGE */
302
303 printf("## Ready for S-Record upload, press ENTER to proceed ...\n");
304 for (;;) {
305 if (getchar() == '\r')
306 break;
307 }
308 if (save_serial(offset, size)) {
309 printf("## S-Record upload aborted\n");
310 } else {
311 printf("## S-Record upload complete\n");
312 }
313 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
314 if (save_baudrate != current_baudrate) {
315 printf("## Switch baudrate to %d bps and press ESC ...\n",
316 (int)current_baudrate);
317 udelay(50000);
318 gd->baudrate = current_baudrate;
319 serial_setbrg();
320 udelay(50000);
321 for (;;) {
322 if (getchar() == 0x1B) /* ESC */
323 break;
324 }
325 }
326 #endif
327 return 0;
328 }
329
330 #define SREC3_START "S0030000FC\n"
331 #define SREC3_FORMAT "S3%02X%08lX%s%02X\n"
332 #define SREC3_END "S70500000000FA\n"
333 #define SREC_BYTES_PER_RECORD 16
334
save_serial(ulong address,ulong count)335 static int save_serial(ulong address, ulong count)
336 {
337 int i, c, reclen, checksum, length;
338 char *hex = "0123456789ABCDEF";
339 char record[2*SREC_BYTES_PER_RECORD+16]; /* buffer for one S-Record */
340 char data[2*SREC_BYTES_PER_RECORD+1]; /* buffer for hex data */
341
342 reclen = 0;
343 checksum = 0;
344
345 if(write_record(SREC3_START)) /* write the header */
346 return (-1);
347 do {
348 if(count) { /* collect hex data in the buffer */
349 c = *(volatile uchar*)(address + reclen); /* get one byte */
350 checksum += c; /* accumulate checksum */
351 data[2*reclen] = hex[(c>>4)&0x0f];
352 data[2*reclen+1] = hex[c & 0x0f];
353 data[2*reclen+2] = '\0';
354 ++reclen;
355 --count;
356 }
357 if(reclen == SREC_BYTES_PER_RECORD || count == 0) {
358 /* enough data collected for one record: dump it */
359 if(reclen) { /* build & write a data record: */
360 /* address + data + checksum */
361 length = 4 + reclen + 1;
362
363 /* accumulate length bytes into checksum */
364 for(i = 0; i < 2; i++)
365 checksum += (length >> (8*i)) & 0xff;
366
367 /* accumulate address bytes into checksum: */
368 for(i = 0; i < 4; i++)
369 checksum += (address >> (8*i)) & 0xff;
370
371 /* make proper checksum byte: */
372 checksum = ~checksum & 0xff;
373
374 /* output one record: */
375 sprintf(record, SREC3_FORMAT, length, address, data, checksum);
376 if(write_record(record))
377 return (-1);
378 }
379 address += reclen; /* increment address */
380 checksum = 0;
381 reclen = 0;
382 }
383 }
384 while(count);
385 if(write_record(SREC3_END)) /* write the final record */
386 return (-1);
387 return(0);
388 }
389
write_record(char * buf)390 static int write_record(char *buf)
391 {
392 char c;
393
394 while((c = *buf++))
395 putc(c);
396
397 /* Check for the console hangup (if any different from serial) */
398
399 if (ctrlc()) {
400 return (-1);
401 }
402 return (0);
403 }
404 # endif
405
406 #endif
407
408
409 #if defined(CONFIG_CMD_LOADB)
410 /*
411 * loadb command (load binary) included
412 */
413 #define XON_CHAR 17
414 #define XOFF_CHAR 19
415 #define START_CHAR 0x01
416 #define ETX_CHAR 0x03
417 #define END_CHAR 0x0D
418 #define SPACE 0x20
419 #define K_ESCAPE 0x23
420 #define SEND_TYPE 'S'
421 #define DATA_TYPE 'D'
422 #define ACK_TYPE 'Y'
423 #define NACK_TYPE 'N'
424 #define BREAK_TYPE 'B'
425 #define tochar(x) ((char) (((x) + SPACE) & 0xff))
426 #define untochar(x) ((int) (((x) - SPACE) & 0xff))
427
428 static void set_kerm_bin_mode(unsigned long *);
429 static int k_recv(void);
430 static ulong load_serial_bin(ulong offset);
431
432
433 static char his_eol; /* character he needs at end of packet */
434 static int his_pad_count; /* number of pad chars he needs */
435 static char his_pad_char; /* pad chars he needs */
436 static char his_quote; /* quote chars he'll use */
437
do_load_serial_bin(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])438 static int do_load_serial_bin(struct cmd_tbl *cmdtp, int flag, int argc,
439 char *const argv[])
440 {
441 ulong offset = 0;
442 ulong addr;
443 int load_baudrate, current_baudrate;
444 int rcode = 0;
445 char *s;
446
447 /* pre-set offset from CONFIG_SYS_LOAD_ADDR */
448 offset = CONFIG_SYS_LOAD_ADDR;
449
450 /* pre-set offset from $loadaddr */
451 s = env_get("loadaddr");
452 if (s)
453 offset = hextoul(s, NULL);
454
455 load_baudrate = current_baudrate = gd->baudrate;
456
457 if (argc >= 2) {
458 offset = hextoul(argv[1], NULL);
459 }
460 if (argc == 3) {
461 load_baudrate = (int)dectoul(argv[2], NULL);
462
463 /* default to current baudrate */
464 if (load_baudrate == 0)
465 load_baudrate = current_baudrate;
466 }
467
468 if (load_baudrate != current_baudrate) {
469 printf("## Switch baudrate to %d bps and press ENTER ...\n",
470 load_baudrate);
471 udelay(50000);
472 gd->baudrate = load_baudrate;
473 serial_setbrg();
474 udelay(50000);
475 for (;;) {
476 if (getchar() == '\r')
477 break;
478 }
479 }
480
481 if (strcmp(argv[0],"loady")==0) {
482 printf("## Ready for binary (ymodem) download "
483 "to 0x%08lX at %d bps...\n",
484 offset,
485 load_baudrate);
486
487 addr = load_serial_ymodem(offset, xyzModem_ymodem);
488
489 if (addr == ~0) {
490 image_load_addr = 0;
491 printf("## Binary (ymodem) download aborted\n");
492 rcode = 1;
493 } else {
494 printf("## Start Addr = 0x%08lX\n", addr);
495 image_load_addr = addr;
496 }
497 } else if (strcmp(argv[0],"loadx")==0) {
498 printf("## Ready for binary (xmodem) download "
499 "to 0x%08lX at %d bps...\n",
500 offset,
501 load_baudrate);
502
503 addr = load_serial_ymodem(offset, xyzModem_xmodem);
504
505 if (addr == ~0) {
506 image_load_addr = 0;
507 printf("## Binary (xmodem) download aborted\n");
508 rcode = 1;
509 } else {
510 printf("## Start Addr = 0x%08lX\n", addr);
511 image_load_addr = addr;
512 }
513 } else {
514
515 printf("## Ready for binary (kermit) download "
516 "to 0x%08lX at %d bps...\n",
517 offset,
518 load_baudrate);
519 addr = load_serial_bin(offset);
520
521 if (addr == ~0) {
522 image_load_addr = 0;
523 printf("## Binary (kermit) download aborted\n");
524 rcode = 1;
525 } else {
526 printf("## Start Addr = 0x%08lX\n", addr);
527 image_load_addr = addr;
528 }
529 }
530 if (load_baudrate != current_baudrate) {
531 printf("## Switch baudrate to %d bps and press ESC ...\n",
532 current_baudrate);
533 udelay(50000);
534 gd->baudrate = current_baudrate;
535 serial_setbrg();
536 udelay(50000);
537 for (;;) {
538 if (getchar() == 0x1B) /* ESC */
539 break;
540 }
541 }
542
543 return rcode;
544 }
545
546
load_serial_bin(ulong offset)547 static ulong load_serial_bin(ulong offset)
548 {
549 int size, i;
550
551 set_kerm_bin_mode((ulong *) offset);
552 size = k_recv();
553
554 /*
555 * Gather any trailing characters (for instance, the ^D which
556 * is sent by 'cu' after sending a file), and give the
557 * box some time (100 * 1 ms)
558 */
559 for (i=0; i<100; ++i) {
560 if (tstc()) {
561 getchar();
562 }
563 udelay(1000);
564 }
565
566 if (size == 0)
567 return ~0; /* Download aborted */
568
569 flush_cache(offset, size);
570
571 printf("## Total Size = 0x%08x = %d Bytes\n", size, size);
572 env_set_hex("filesize", size);
573
574 return offset;
575 }
576
send_pad(void)577 static void send_pad(void)
578 {
579 int count = his_pad_count;
580
581 while (count-- > 0)
582 putc(his_pad_char);
583 }
584
585 /* converts escaped kermit char to binary char */
ktrans(char in)586 static char ktrans(char in)
587 {
588 if ((in & 0x60) == 0x40) {
589 return (char) (in & ~0x40);
590 } else if ((in & 0x7f) == 0x3f) {
591 return (char) (in | 0x40);
592 } else
593 return in;
594 }
595
chk1(char * buffer)596 static int chk1(char *buffer)
597 {
598 int total = 0;
599
600 while (*buffer) {
601 total += *buffer++;
602 }
603 return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
604 }
605
s1_sendpacket(char * packet)606 static void s1_sendpacket(char *packet)
607 {
608 send_pad();
609 while (*packet) {
610 putc(*packet++);
611 }
612 }
613
614 static char a_b[24];
send_ack(int n)615 static void send_ack(int n)
616 {
617 a_b[0] = START_CHAR;
618 a_b[1] = tochar(3);
619 a_b[2] = tochar(n);
620 a_b[3] = ACK_TYPE;
621 a_b[4] = '\0';
622 a_b[4] = tochar(chk1(&a_b[1]));
623 a_b[5] = his_eol;
624 a_b[6] = '\0';
625 s1_sendpacket(a_b);
626 }
627
send_nack(int n)628 static void send_nack(int n)
629 {
630 a_b[0] = START_CHAR;
631 a_b[1] = tochar(3);
632 a_b[2] = tochar(n);
633 a_b[3] = NACK_TYPE;
634 a_b[4] = '\0';
635 a_b[4] = tochar(chk1(&a_b[1]));
636 a_b[5] = his_eol;
637 a_b[6] = '\0';
638 s1_sendpacket(a_b);
639 }
640
641
642 static void (*os_data_init)(void);
643 static void (*os_data_char)(char new_char);
644 static int os_data_state, os_data_state_saved;
645 static char *os_data_addr, *os_data_addr_saved;
646 static char *bin_start_address;
647
bin_data_init(void)648 static void bin_data_init(void)
649 {
650 os_data_state = 0;
651 os_data_addr = bin_start_address;
652 }
653
os_data_save(void)654 static void os_data_save(void)
655 {
656 os_data_state_saved = os_data_state;
657 os_data_addr_saved = os_data_addr;
658 }
659
os_data_restore(void)660 static void os_data_restore(void)
661 {
662 os_data_state = os_data_state_saved;
663 os_data_addr = os_data_addr_saved;
664 }
665
bin_data_char(char new_char)666 static void bin_data_char(char new_char)
667 {
668 switch (os_data_state) {
669 case 0: /* data */
670 *os_data_addr++ = new_char;
671 break;
672 }
673 }
674
set_kerm_bin_mode(unsigned long * addr)675 static void set_kerm_bin_mode(unsigned long *addr)
676 {
677 bin_start_address = (char *) addr;
678 os_data_init = bin_data_init;
679 os_data_char = bin_data_char;
680 }
681
682
683 /* k_data_* simply handles the kermit escape translations */
684 static int k_data_escape, k_data_escape_saved;
k_data_init(void)685 static void k_data_init(void)
686 {
687 k_data_escape = 0;
688 os_data_init();
689 }
690
k_data_save(void)691 static void k_data_save(void)
692 {
693 k_data_escape_saved = k_data_escape;
694 os_data_save();
695 }
696
k_data_restore(void)697 static void k_data_restore(void)
698 {
699 k_data_escape = k_data_escape_saved;
700 os_data_restore();
701 }
702
k_data_char(char new_char)703 static void k_data_char(char new_char)
704 {
705 if (k_data_escape) {
706 /* last char was escape - translate this character */
707 os_data_char(ktrans(new_char));
708 k_data_escape = 0;
709 } else {
710 if (new_char == his_quote) {
711 /* this char is escape - remember */
712 k_data_escape = 1;
713 } else {
714 /* otherwise send this char as-is */
715 os_data_char(new_char);
716 }
717 }
718 }
719
720 #define SEND_DATA_SIZE 20
721 static char send_parms[SEND_DATA_SIZE];
722 static char *send_ptr;
723
724 /* handle_send_packet interprits the protocol info and builds and
725 sends an appropriate ack for what we can do */
handle_send_packet(int n)726 static void handle_send_packet(int n)
727 {
728 int length = 3;
729 int bytes;
730
731 /* initialize some protocol parameters */
732 his_eol = END_CHAR; /* default end of line character */
733 his_pad_count = 0;
734 his_pad_char = '\0';
735 his_quote = K_ESCAPE;
736
737 /* ignore last character if it filled the buffer */
738 if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
739 --send_ptr;
740 bytes = send_ptr - send_parms; /* how many bytes we'll process */
741 do {
742 if (bytes-- <= 0)
743 break;
744 /* handle MAXL - max length */
745 /* ignore what he says - most I'll take (here) is 94 */
746 a_b[++length] = tochar(94);
747 if (bytes-- <= 0)
748 break;
749 /* handle TIME - time you should wait for my packets */
750 /* ignore what he says - don't wait for my ack longer than 1 second */
751 a_b[++length] = tochar(1);
752 if (bytes-- <= 0)
753 break;
754 /* handle NPAD - number of pad chars I need */
755 /* remember what he says - I need none */
756 his_pad_count = untochar(send_parms[2]);
757 a_b[++length] = tochar(0);
758 if (bytes-- <= 0)
759 break;
760 /* handle PADC - pad chars I need */
761 /* remember what he says - I need none */
762 his_pad_char = ktrans(send_parms[3]);
763 a_b[++length] = 0x40; /* He should ignore this */
764 if (bytes-- <= 0)
765 break;
766 /* handle EOL - end of line he needs */
767 /* remember what he says - I need CR */
768 his_eol = untochar(send_parms[4]);
769 a_b[++length] = tochar(END_CHAR);
770 if (bytes-- <= 0)
771 break;
772 /* handle QCTL - quote control char he'll use */
773 /* remember what he says - I'll use '#' */
774 his_quote = send_parms[5];
775 a_b[++length] = '#';
776 if (bytes-- <= 0)
777 break;
778 /* handle QBIN - 8-th bit prefixing */
779 /* ignore what he says - I refuse */
780 a_b[++length] = 'N';
781 if (bytes-- <= 0)
782 break;
783 /* handle CHKT - the clock check type */
784 /* ignore what he says - I do type 1 (for now) */
785 a_b[++length] = '1';
786 if (bytes-- <= 0)
787 break;
788 /* handle REPT - the repeat prefix */
789 /* ignore what he says - I refuse (for now) */
790 a_b[++length] = 'N';
791 if (bytes-- <= 0)
792 break;
793 /* handle CAPAS - the capabilities mask */
794 /* ignore what he says - I only do long packets - I don't do windows */
795 a_b[++length] = tochar(2); /* only long packets */
796 a_b[++length] = tochar(0); /* no windows */
797 a_b[++length] = tochar(94); /* large packet msb */
798 a_b[++length] = tochar(94); /* large packet lsb */
799 } while (0);
800
801 a_b[0] = START_CHAR;
802 a_b[1] = tochar(length);
803 a_b[2] = tochar(n);
804 a_b[3] = ACK_TYPE;
805 a_b[++length] = '\0';
806 a_b[length] = tochar(chk1(&a_b[1]));
807 a_b[++length] = his_eol;
808 a_b[++length] = '\0';
809 s1_sendpacket(a_b);
810 }
811
812 /* k_recv receives a OS Open image file over kermit line */
k_recv(void)813 static int k_recv(void)
814 {
815 char new_char;
816 char k_state, k_state_saved;
817 int sum;
818 int done;
819 int length;
820 int n, last_n;
821 int len_lo, len_hi;
822
823 /* initialize some protocol parameters */
824 his_eol = END_CHAR; /* default end of line character */
825 his_pad_count = 0;
826 his_pad_char = '\0';
827 his_quote = K_ESCAPE;
828
829 /* initialize the k_recv and k_data state machine */
830 done = 0;
831 k_state = 0;
832 k_data_init();
833 k_state_saved = k_state;
834 k_data_save();
835 n = 0; /* just to get rid of a warning */
836 last_n = -1;
837
838 /* expect this "type" sequence (but don't check):
839 S: send initiate
840 F: file header
841 D: data (multiple)
842 Z: end of file
843 B: break transmission
844 */
845
846 /* enter main loop */
847 while (!done) {
848 /* set the send packet pointer to begining of send packet parms */
849 send_ptr = send_parms;
850
851 /* With each packet, start summing the bytes starting with the length.
852 Save the current sequence number.
853 Note the type of the packet.
854 If a character less than SPACE (0x20) is received - error.
855 */
856
857 #if 0
858 /* OLD CODE, Prior to checking sequence numbers */
859 /* first have all state machines save current states */
860 k_state_saved = k_state;
861 k_data_save ();
862 #endif
863
864 /* get a packet */
865 /* wait for the starting character or ^C */
866 for (;;) {
867 switch (getchar()) {
868 case START_CHAR: /* start packet */
869 goto START;
870 case ETX_CHAR: /* ^C waiting for packet */
871 return (0);
872 default:
873 ;
874 }
875 }
876 START:
877 /* get length of packet */
878 sum = 0;
879 new_char = getchar();
880 if ((new_char & 0xE0) == 0)
881 goto packet_error;
882 sum += new_char & 0xff;
883 length = untochar(new_char);
884 /* get sequence number */
885 new_char = getchar();
886 if ((new_char & 0xE0) == 0)
887 goto packet_error;
888 sum += new_char & 0xff;
889 n = untochar(new_char);
890 --length;
891
892 /* NEW CODE - check sequence numbers for retried packets */
893 /* Note - this new code assumes that the sequence number is correctly
894 * received. Handling an invalid sequence number adds another layer
895 * of complexity that may not be needed - yet! At this time, I'm hoping
896 * that I don't need to buffer the incoming data packets and can write
897 * the data into memory in real time.
898 */
899 if (n == last_n) {
900 /* same sequence number, restore the previous state */
901 k_state = k_state_saved;
902 k_data_restore();
903 } else {
904 /* new sequence number, checkpoint the download */
905 last_n = n;
906 k_state_saved = k_state;
907 k_data_save();
908 }
909 /* END NEW CODE */
910
911 /* get packet type */
912 new_char = getchar();
913 if ((new_char & 0xE0) == 0)
914 goto packet_error;
915 sum += new_char & 0xff;
916 k_state = new_char;
917 --length;
918 /* check for extended length */
919 if (length == -2) {
920 /* (length byte was 0, decremented twice) */
921 /* get the two length bytes */
922 new_char = getchar();
923 if ((new_char & 0xE0) == 0)
924 goto packet_error;
925 sum += new_char & 0xff;
926 len_hi = untochar(new_char);
927 new_char = getchar();
928 if ((new_char & 0xE0) == 0)
929 goto packet_error;
930 sum += new_char & 0xff;
931 len_lo = untochar(new_char);
932 length = len_hi * 95 + len_lo;
933 /* check header checksum */
934 new_char = getchar();
935 if ((new_char & 0xE0) == 0)
936 goto packet_error;
937 if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
938 goto packet_error;
939 sum += new_char & 0xff;
940 /* --length; */ /* new length includes only data and block check to come */
941 }
942 /* bring in rest of packet */
943 while (length > 1) {
944 new_char = getchar();
945 if ((new_char & 0xE0) == 0)
946 goto packet_error;
947 sum += new_char & 0xff;
948 --length;
949 if (k_state == DATA_TYPE) {
950 /* pass on the data if this is a data packet */
951 k_data_char (new_char);
952 } else if (k_state == SEND_TYPE) {
953 /* save send pack in buffer as is */
954 *send_ptr++ = new_char;
955 /* if too much data, back off the pointer */
956 if (send_ptr >= &send_parms[SEND_DATA_SIZE])
957 --send_ptr;
958 }
959 }
960 /* get and validate checksum character */
961 new_char = getchar();
962 if ((new_char & 0xE0) == 0)
963 goto packet_error;
964 if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
965 goto packet_error;
966 /* get END_CHAR */
967 new_char = getchar();
968 if (new_char != END_CHAR) {
969 packet_error:
970 /* restore state machines */
971 k_state = k_state_saved;
972 k_data_restore();
973 /* send a negative acknowledge packet in */
974 send_nack(n);
975 } else if (k_state == SEND_TYPE) {
976 /* crack the protocol parms, build an appropriate ack packet */
977 handle_send_packet(n);
978 } else {
979 /* send simple acknowledge packet in */
980 send_ack(n);
981 /* quit if end of transmission */
982 if (k_state == BREAK_TYPE)
983 done = 1;
984 }
985 }
986 return ((ulong) os_data_addr - (ulong) bin_start_address);
987 }
988
getcxmodem(void)989 static int getcxmodem(void) {
990 if (tstc())
991 return (getchar());
992 return -1;
993 }
load_serial_ymodem(ulong offset,int mode)994 static ulong load_serial_ymodem(ulong offset, int mode)
995 {
996 int size;
997 int err;
998 int res;
999 connection_info_t info;
1000 char ymodemBuf[1024];
1001 ulong store_addr = ~0;
1002 ulong addr = 0;
1003
1004 size = 0;
1005 info.mode = mode;
1006 res = xyzModem_stream_open(&info, &err);
1007 if (!res) {
1008
1009 err = 0;
1010 while ((res =
1011 xyzModem_stream_read(ymodemBuf, 1024, &err)) > 0) {
1012 store_addr = addr + offset;
1013 size += res;
1014 addr += res;
1015 #ifdef CONFIG_MTD_NOR_FLASH
1016 if (addr2info(store_addr)) {
1017 int rc;
1018
1019 rc = flash_write((char *) ymodemBuf,
1020 store_addr, res);
1021 if (rc != 0) {
1022 xyzModem_stream_terminate(true, &getcxmodem);
1023 xyzModem_stream_close(&err);
1024 printf("\n");
1025 flash_perror(rc);
1026 return (~0);
1027 }
1028 } else
1029 #endif
1030 {
1031 memcpy((char *)(store_addr), ymodemBuf,
1032 res);
1033 }
1034
1035 }
1036 if (err) {
1037 xyzModem_stream_terminate((err == xyzModem_cancel) ? false : true, &getcxmodem);
1038 xyzModem_stream_close(&err);
1039 printf("\n%s\n", xyzModem_error(err));
1040 return (~0); /* Download aborted */
1041 }
1042
1043 if (IS_ENABLED(CONFIG_CMD_BOOTEFI))
1044 efi_set_bootdev("Uart", "", "",
1045 map_sysmem(offset, 0), size);
1046
1047 } else {
1048 printf("\n%s\n", xyzModem_error(err));
1049 return (~0); /* Download aborted */
1050 }
1051
1052 xyzModem_stream_terminate(false, &getcxmodem);
1053 xyzModem_stream_close(&err);
1054
1055
1056 flush_cache(offset, ALIGN(size, ARCH_DMA_MINALIGN));
1057
1058 printf("## Total Size = 0x%08x = %d Bytes\n", size, size);
1059 env_set_hex("filesize", size);
1060
1061 return offset;
1062 }
1063
1064 #endif
1065
1066 /* -------------------------------------------------------------------- */
1067
1068 #if defined(CONFIG_CMD_LOADS)
1069
1070 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
1071 U_BOOT_CMD(
1072 loads, 3, 0, do_load_serial,
1073 "load S-Record file over serial line",
1074 "[ off ] [ baud ]\n"
1075 " - load S-Record file over serial line"
1076 " with offset 'off' and baudrate 'baud'"
1077 );
1078
1079 #else /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1080 U_BOOT_CMD(
1081 loads, 2, 0, do_load_serial,
1082 "load S-Record file over serial line",
1083 "[ off ]\n"
1084 " - load S-Record file over serial line with offset 'off'"
1085 );
1086 #endif /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1087
1088 /*
1089 * SAVES always requires LOADS support, but not vice versa
1090 */
1091
1092
1093 #if defined(CONFIG_CMD_SAVES)
1094 #ifdef CONFIG_SYS_LOADS_BAUD_CHANGE
1095 U_BOOT_CMD(
1096 saves, 4, 0, do_save_serial,
1097 "save S-Record file over serial line",
1098 "[ off ] [size] [ baud ]\n"
1099 " - save S-Record file over serial line"
1100 " with offset 'off', size 'size' and baudrate 'baud'"
1101 );
1102 #else /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1103 U_BOOT_CMD(
1104 saves, 3, 0, do_save_serial,
1105 "save S-Record file over serial line",
1106 "[ off ] [size]\n"
1107 " - save S-Record file over serial line with offset 'off' and size 'size'"
1108 );
1109 #endif /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1110 #endif /* CONFIG_CMD_SAVES */
1111 #endif /* CONFIG_CMD_LOADS */
1112
1113
1114 #if defined(CONFIG_CMD_LOADB)
1115 U_BOOT_CMD(
1116 loadb, 3, 0, do_load_serial_bin,
1117 "load binary file over serial line (kermit mode)",
1118 "[ addr [ baud ] ]\n"
1119 " - load binary file over serial line"
1120 " at address 'addr' with baudrate 'baud'"
1121 );
1122
1123 U_BOOT_CMD(
1124 loadx, 3, 0, do_load_serial_bin,
1125 "load binary file over serial line (xmodem mode)",
1126 "[ addr [ baud ] ]\n"
1127 " - load binary file over serial line"
1128 " at address 'addr' with baudrate 'baud'"
1129 );
1130
1131 U_BOOT_CMD(
1132 loady, 3, 0, do_load_serial_bin,
1133 "load binary file over serial line (ymodem mode)",
1134 "[ addr [ baud ] ]\n"
1135 " - load binary file over serial line"
1136 " at address 'addr' with baudrate 'baud'"
1137 );
1138
1139 #endif /* CONFIG_CMD_LOADB */
1140