summaryrefslogtreecommitdiff
path: root/cmd/load.c
blob: 5c4f34781d452e83448ed8f35142e860c157f4bc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */

/*
 * Serial up- and download support
 */
#include <common.h>
#include <command.h>
#include <console.h>
#include <cpu_func.h>
#include <efi_loader.h>
#include <env.h>
#include <exports.h>
#ifdef CONFIG_MTD_NOR_FLASH
#include <flash.h>
#endif
#include <image.h>
#include <lmb.h>
#include <mapmem.h>
#include <net.h>
#include <s_record.h>
#include <serial.h>
#include <xyzModem.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <linux/delay.h>

DECLARE_GLOBAL_DATA_PTR;

#if defined(CONFIG_CMD_LOADB)
static ulong load_serial_ymodem(ulong offset, int mode);
#endif

#if defined(CONFIG_CMD_LOADS)
static ulong load_serial(long offset);
static int read_record(char *buf, ulong len);
# if defined(CONFIG_CMD_SAVES)
static int save_serial(ulong offset, ulong size);
static int write_record(char *buf);
#endif

static int do_echo = 1;
#endif

/* -------------------------------------------------------------------- */

#if defined(CONFIG_CMD_LOADS)
static int do_load_serial(struct cmd_tbl *cmdtp, int flag, int argc,
			  char *const argv[])
{
	long offset = 0;
	ulong addr;
	int i;
	char *env_echo;
	int rcode = 0;
#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	int load_baudrate, current_baudrate;

	load_baudrate = current_baudrate = gd->baudrate;
#endif

	env_echo = env_get("loads_echo");
	if (env_echo && *env_echo == '1')
		do_echo = 1;
	else
		do_echo = 0;

#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	if (argc >= 2) {
		offset = simple_strtol(argv[1], NULL, 16);
	}
	if (argc == 3) {
		load_baudrate = (int)dectoul(argv[2], NULL);

		/* default to current baudrate */
		if (load_baudrate == 0)
			load_baudrate = current_baudrate;
	}
	if (load_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ENTER ...\n",
			load_baudrate);
		udelay(50000);
		flush();
		gd->baudrate = load_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == '\r')
				break;
		}
	}
#else	/* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
	if (argc == 2) {
		offset = simple_strtol(argv[1], NULL, 16);
	}
#endif	/* CONFIG_SYS_LOADS_BAUD_CHANGE */

	printf("## Ready for S-Record download ...\n");

	addr = load_serial(offset);

	/*
	 * Gather any trailing characters (for instance, the ^D which
	 * is sent by 'cu' after sending a file), and give the
	 * box some time (100 * 1 ms)
	 */
	for (i=0; i<100; ++i) {
		if (tstc()) {
			getchar();
		}
		udelay(1000);
	}

	if (addr == ~0) {
		printf("## S-Record download aborted\n");
		rcode = 1;
	} else {
		printf("## Start Addr      = 0x%08lX\n", addr);
		image_load_addr = addr;
	}

#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	if (load_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ESC ...\n",
			current_baudrate);
		udelay(50000);
		flush();
		gd->baudrate = current_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == 0x1B) /* ESC */
				break;
		}
	}
#endif
	return rcode;
}

static ulong load_serial(long offset)
{
	struct lmb lmb;
	char	record[SREC_MAXRECLEN + 1];	/* buffer for one S-Record	*/
	char	binbuf[SREC_MAXBINLEN];		/* buffer for binary data	*/
	int	binlen;				/* no. of data bytes in S-Rec.	*/
	int	type;				/* return code for record type	*/
	ulong	addr;				/* load address from S-Record	*/
	ulong	size;				/* number of bytes transferred	*/
	ulong	store_addr;
	ulong	start_addr = ~0;
	ulong	end_addr   =  0;
	int	line_count =  0;
	long ret;

	lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);

	while (read_record(record, SREC_MAXRECLEN + 1) >= 0) {
		type = srec_decode(record, &binlen, &addr, binbuf);

		if (type < 0) {
			return (~0);		/* Invalid S-Record		*/
		}

		switch (type) {
		case SREC_DATA2:
		case SREC_DATA3:
		case SREC_DATA4:
		    store_addr = addr + offset;
#ifdef CONFIG_MTD_NOR_FLASH
		    if (addr2info(store_addr)) {
			int rc;

			rc = flash_write((char *)binbuf,store_addr,binlen);
			if (rc != 0) {
				flash_perror(rc);
				return (~0);
			}
		    } else
#endif
		    {
			ret = lmb_reserve(&lmb, store_addr, binlen);
			if (ret) {
				printf("\nCannot overwrite reserved area (%08lx..%08lx)\n",
					store_addr, store_addr + binlen);
				return ret;
			}
			memcpy((char *)(store_addr), binbuf, binlen);
			lmb_free(&lmb, store_addr, binlen);
		    }
		    if ((store_addr) < start_addr)
			start_addr = store_addr;
		    if ((store_addr + binlen - 1) > end_addr)
			end_addr = store_addr + binlen - 1;
		    break;
		case SREC_END2:
		case SREC_END3:
		case SREC_END4:
		    udelay(10000);
		    size = end_addr - start_addr + 1;
		    printf("\n"
			    "## First Load Addr = 0x%08lX\n"
			    "## Last  Load Addr = 0x%08lX\n"
			    "## Total Size      = 0x%08lX = %ld Bytes\n",
			    start_addr, end_addr, size, size
		    );
		    flush_cache(start_addr, size);
		    env_set_hex("filesize", size);
		    return (addr);
		case SREC_START:
		    break;
		default:
		    break;
		}
		if (!do_echo) {	/* print a '.' every 100 lines */
			if ((++line_count % 100) == 0)
				putc('.');
		}
	}

	return (~0);			/* Download aborted		*/
}

static int read_record(char *buf, ulong len)
{
	char *p;
	char c;

	--len;	/* always leave room for terminating '\0' byte */

	for (p=buf; p < buf+len; ++p) {
		c = getchar();		/* read character		*/
		if (do_echo)
			putc(c);	/* ... and echo it		*/

		switch (c) {
		case '\r':
		case '\n':
			*p = '\0';
			return (p - buf);
		case '\0':
		case 0x03:			/* ^C - Control C		*/
			return (-1);
		default:
			*p = c;
		}

		/* Check for the console hangup (if any different from serial) */
		if (gd->jt->getc != getchar) {
			if (ctrlc())
				return (-1);
		}
	}

	/* line too long - truncate */
	*p = '\0';
	return (p - buf);
}

#if defined(CONFIG_CMD_SAVES)

int do_save_serial(struct cmd_tbl *cmdtp, int flag, int argc,
		   char *const argv[])
{
	ulong offset = 0;
	ulong size   = 0;
#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	int save_baudrate, current_baudrate;

	save_baudrate = current_baudrate = gd->baudrate;
#endif

	if (argc >= 2) {
		offset = hextoul(argv[1], NULL);
	}
#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	if (argc >= 3) {
		size = hextoul(argv[2], NULL);
	}
	if (argc == 4) {
		save_baudrate = (int)dectoul(argv[3], NULL);

		/* default to current baudrate */
		if (save_baudrate == 0)
			save_baudrate = current_baudrate;
	}
	if (save_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ENTER ...\n",
			save_baudrate);
		udelay(50000);
		gd->baudrate = save_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == '\r')
				break;
		}
	}
#else	/* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
	if (argc == 3) {
		size = hextoul(argv[2], NULL);
	}
#endif	/* CONFIG_SYS_LOADS_BAUD_CHANGE */

	printf("## Ready for S-Record upload, press ENTER to proceed ...\n");
	for (;;) {
		if (getchar() == '\r')
			break;
	}
	if (save_serial(offset, size)) {
		printf("## S-Record upload aborted\n");
	} else {
		printf("## S-Record upload complete\n");
	}
#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
	if (save_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ESC ...\n",
			(int)current_baudrate);
		udelay(50000);
		flush();
		gd->baudrate = current_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == 0x1B) /* ESC */
				break;
		}
	}
#endif
	return 0;
}

#define SREC3_START				"S0030000FC\n"
#define SREC3_FORMAT			"S3%02X%08lX%s%02X\n"
#define SREC3_END				"S70500000000FA\n"
#define SREC_BYTES_PER_RECORD	16

static int save_serial(ulong address, ulong count)
{
	int i, c, reclen, checksum, length;
	char *hex = "0123456789ABCDEF";
	char	record[2*SREC_BYTES_PER_RECORD+16];	/* buffer for one S-Record	*/
	char	data[2*SREC_BYTES_PER_RECORD+1];	/* buffer for hex data	*/

	reclen = 0;
	checksum  = 0;

	if(write_record(SREC3_START))			/* write the header */
		return (-1);
	do {
		if(count) {						/* collect hex data in the buffer  */
			c = *(volatile uchar*)(address + reclen);	/* get one byte    */
			checksum += c;							/* accumulate checksum */
			data[2*reclen]   = hex[(c>>4)&0x0f];
			data[2*reclen+1] = hex[c & 0x0f];
			data[2*reclen+2] = '\0';
			++reclen;
			--count;
		}
		if(reclen == SREC_BYTES_PER_RECORD || count == 0) {
			/* enough data collected for one record: dump it */
			if(reclen) {	/* build & write a data record: */
				/* address + data + checksum */
				length = 4 + reclen + 1;

				/* accumulate length bytes into checksum */
				for(i = 0; i < 2; i++)
					checksum += (length >> (8*i)) & 0xff;

				/* accumulate address bytes into checksum: */
				for(i = 0; i < 4; i++)
					checksum += (address >> (8*i)) & 0xff;

				/* make proper checksum byte: */
				checksum = ~checksum & 0xff;

				/* output one record: */
				sprintf(record, SREC3_FORMAT, length, address, data, checksum);
				if(write_record(record))
					return (-1);
			}
			address  += reclen;  /* increment address */
			checksum  = 0;
			reclen    = 0;
		}
	}
	while(count);
	if(write_record(SREC3_END))	/* write the final record */
		return (-1);
	return(0);
}

static int write_record(char *buf)
{
	char c;

	while((c = *buf++))
		putc(c);

	/* Check for the console hangup (if any different from serial) */

	if (ctrlc()) {
	    return (-1);
	}
	return (0);
}
# endif

#endif


#if defined(CONFIG_CMD_LOADB)
/*
 * loadb command (load binary) included
 */
#define XON_CHAR        17
#define XOFF_CHAR       19
#define START_CHAR      0x01
#define ETX_CHAR	0x03
#define END_CHAR        0x0D
#define SPACE           0x20
#define K_ESCAPE        0x23
#define SEND_TYPE       'S'
#define DATA_TYPE       'D'
#define ACK_TYPE        'Y'
#define NACK_TYPE       'N'
#define BREAK_TYPE      'B'
#define tochar(x) ((char) (((x) + SPACE) & 0xff))
#define untochar(x) ((int) (((x) - SPACE) & 0xff))

static void set_kerm_bin_mode(unsigned long *);
static int k_recv(void);
static ulong load_serial_bin(ulong offset);


static char his_eol;        /* character he needs at end of packet */
static int  his_pad_count;  /* number of pad chars he needs */
static char his_pad_char;   /* pad chars he needs */
static char his_quote;      /* quote chars he'll use */

static int do_load_serial_bin(struct cmd_tbl *cmdtp, int flag, int argc,
			      char *const argv[])
{
	ulong offset = 0;
	ulong addr;
	int load_baudrate, current_baudrate;
	int rcode = 0;
	char *s;

	/* pre-set offset from CONFIG_SYS_LOAD_ADDR */
	offset = CONFIG_SYS_LOAD_ADDR;

	/* pre-set offset from $loadaddr */
	s = env_get("loadaddr");
	if (s)
		offset = hextoul(s, NULL);

	load_baudrate = current_baudrate = gd->baudrate;

	if (argc >= 2) {
		offset = hextoul(argv[1], NULL);
	}
	if (argc == 3) {
		load_baudrate = (int)dectoul(argv[2], NULL);

		/* default to current baudrate */
		if (load_baudrate == 0)
			load_baudrate = current_baudrate;
	}

	if (load_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ENTER ...\n",
			load_baudrate);
		udelay(50000);
		flush();
		gd->baudrate = load_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == '\r')
				break;
		}
	}

	if (strcmp(argv[0],"loady")==0) {
		printf("## Ready for binary (ymodem) download "
			"to 0x%08lX at %d bps...\n",
			offset,
			load_baudrate);

		addr = load_serial_ymodem(offset, xyzModem_ymodem);

		if (addr == ~0) {
			image_load_addr = 0;
			printf("## Binary (ymodem) download aborted\n");
			rcode = 1;
		} else {
			printf("## Start Addr      = 0x%08lX\n", addr);
			image_load_addr = addr;
		}
	} else if (strcmp(argv[0],"loadx")==0) {
		printf("## Ready for binary (xmodem) download "
			"to 0x%08lX at %d bps...\n",
			offset,
			load_baudrate);

		addr = load_serial_ymodem(offset, xyzModem_xmodem);

		if (addr == ~0) {
			image_load_addr = 0;
			printf("## Binary (xmodem) download aborted\n");
			rcode = 1;
		} else {
			printf("## Start Addr      = 0x%08lX\n", addr);
			image_load_addr = addr;
		}
	} else {

		printf("## Ready for binary (kermit) download "
			"to 0x%08lX at %d bps...\n",
			offset,
			load_baudrate);
		addr = load_serial_bin(offset);

		if (addr == ~0) {
			image_load_addr = 0;
			printf("## Binary (kermit) download aborted\n");
			rcode = 1;
		} else {
			printf("## Start Addr      = 0x%08lX\n", addr);
			image_load_addr = addr;
		}
	}
	if (load_baudrate != current_baudrate) {
		printf("## Switch baudrate to %d bps and press ESC ...\n",
			current_baudrate);
		udelay(50000);
		flush();
		gd->baudrate = current_baudrate;
		serial_setbrg();
		udelay(50000);
		for (;;) {
			if (getchar() == 0x1B) /* ESC */
				break;
		}
	}

	return rcode;
}


static ulong load_serial_bin(ulong offset)
{
	int size, i;

	set_kerm_bin_mode((ulong *) offset);
	size = k_recv();

	/*
	 * Gather any trailing characters (for instance, the ^D which
	 * is sent by 'cu' after sending a file), and give the
	 * box some time (100 * 1 ms)
	 */
	for (i=0; i<100; ++i) {
		if (tstc()) {
			getchar();
		}
		udelay(1000);
	}

	if (size == 0)
		return ~0; /* Download aborted */

	flush_cache(offset, size);

	printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
	env_set_hex("filesize", size);

	return offset;
}

static void send_pad(void)
{
	int count = his_pad_count;

	while (count-- > 0)
		putc(his_pad_char);
}

/* converts escaped kermit char to binary char */
static char ktrans(char in)
{
	if ((in & 0x60) == 0x40) {
		return (char) (in & ~0x40);
	} else if ((in & 0x7f) == 0x3f) {
		return (char) (in | 0x40);
	} else
		return in;
}

static int chk1(char *buffer)
{
	int total = 0;

	while (*buffer) {
		total += *buffer++;
	}
	return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
}

static void s1_sendpacket(char *packet)
{
	send_pad();
	while (*packet) {
		putc(*packet++);
	}
}

static char a_b[24];
static void send_ack(int n)
{
	a_b[0] = START_CHAR;
	a_b[1] = tochar(3);
	a_b[2] = tochar(n);
	a_b[3] = ACK_TYPE;
	a_b[4] = '\0';
	a_b[4] = tochar(chk1(&a_b[1]));
	a_b[5] = his_eol;
	a_b[6] = '\0';
	s1_sendpacket(a_b);
}

static void send_nack(int n)
{
	a_b[0] = START_CHAR;
	a_b[1] = tochar(3);
	a_b[2] = tochar(n);
	a_b[3] = NACK_TYPE;
	a_b[4] = '\0';
	a_b[4] = tochar(chk1(&a_b[1]));
	a_b[5] = his_eol;
	a_b[6] = '\0';
	s1_sendpacket(a_b);
}


static void (*os_data_init)(void);
static void (*os_data_char)(char new_char);
static int os_data_state, os_data_state_saved;
static char *os_data_addr, *os_data_addr_saved;
static char *bin_start_address;

static void bin_data_init(void)
{
	os_data_state = 0;
	os_data_addr = bin_start_address;
}

static void os_data_save(void)
{
	os_data_state_saved = os_data_state;
	os_data_addr_saved = os_data_addr;
}

static void os_data_restore(void)
{
	os_data_state = os_data_state_saved;
	os_data_addr = os_data_addr_saved;
}

static void bin_data_char(char new_char)
{
	switch (os_data_state) {
	case 0:					/* data */
		*os_data_addr++ = new_char;
		break;
	}
}

static void set_kerm_bin_mode(unsigned long *addr)
{
	bin_start_address = (char *) addr;
	os_data_init = bin_data_init;
	os_data_char = bin_data_char;
}


/* k_data_* simply handles the kermit escape translations */
static int k_data_escape, k_data_escape_saved;
static void k_data_init(void)
{
	k_data_escape = 0;
	os_data_init();
}

static void k_data_save(void)
{
	k_data_escape_saved = k_data_escape;
	os_data_save();
}

static void k_data_restore(void)
{
	k_data_escape = k_data_escape_saved;
	os_data_restore();
}

static void k_data_char(char new_char)
{
	if (k_data_escape) {
		/* last char was escape - translate this character */
		os_data_char(ktrans(new_char));
		k_data_escape = 0;
	} else {
		if (new_char == his_quote) {
			/* this char is escape - remember */
			k_data_escape = 1;
		} else {
			/* otherwise send this char as-is */
			os_data_char(new_char);
		}
	}
}

#define SEND_DATA_SIZE  20
static char send_parms[SEND_DATA_SIZE];
static char *send_ptr;

/* handle_send_packet interprits the protocol info and builds and
   sends an appropriate ack for what we can do */
static void handle_send_packet(int n)
{
	int length = 3;
	int bytes;

	/* initialize some protocol parameters */
	his_eol = END_CHAR;		/* default end of line character */
	his_pad_count = 0;
	his_pad_char = '\0';
	his_quote = K_ESCAPE;

	/* ignore last character if it filled the buffer */
	if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
		--send_ptr;
	bytes = send_ptr - send_parms;	/* how many bytes we'll process */
	do {
		if (bytes-- <= 0)
			break;
		/* handle MAXL - max length */
		/* ignore what he says - most I'll take (here) is 94 */
		a_b[++length] = tochar(94);
		if (bytes-- <= 0)
			break;
		/* handle TIME - time you should wait for my packets */
		/* ignore what he says - don't wait for my ack longer than 1 second */
		a_b[++length] = tochar(1);
		if (bytes-- <= 0)
			break;
		/* handle NPAD - number of pad chars I need */
		/* remember what he says - I need none */
		his_pad_count = untochar(send_parms[2]);
		a_b[++length] = tochar(0);
		if (bytes-- <= 0)
			break;
		/* handle PADC - pad chars I need */
		/* remember what he says - I need none */
		his_pad_char = ktrans(send_parms[3]);
		a_b[++length] = 0x40;	/* He should ignore this */
		if (bytes-- <= 0)
			break;
		/* handle EOL - end of line he needs */
		/* remember what he says - I need CR */
		his_eol = untochar(send_parms[4]);
		a_b[++length] = tochar(END_CHAR);
		if (bytes-- <= 0)
			break;
		/* handle QCTL - quote control char he'll use */
		/* remember what he says - I'll use '#' */
		his_quote = send_parms[5];
		a_b[++length] = '#';
		if (bytes-- <= 0)
			break;
		/* handle QBIN - 8-th bit prefixing */
		/* ignore what he says - I refuse */
		a_b[++length] = 'N';
		if (bytes-- <= 0)
			break;
		/* handle CHKT - the clock check type */
		/* ignore what he says - I do type 1 (for now) */
		a_b[++length] = '1';
		if (bytes-- <= 0)
			break;
		/* handle REPT - the repeat prefix */
		/* ignore what he says - I refuse (for now) */
		a_b[++length] = 'N';
		if (bytes-- <= 0)
			break;
		/* handle CAPAS - the capabilities mask */
		/* ignore what he says - I only do long packets - I don't do windows */
		a_b[++length] = tochar(2);	/* only long packets */
		a_b[++length] = tochar(0);	/* no windows */
		a_b[++length] = tochar(94);	/* large packet msb */
		a_b[++length] = tochar(94);	/* large packet lsb */
	} while (0);

	a_b[0] = START_CHAR;
	a_b[1] = tochar(length);
	a_b[2] = tochar(n);
	a_b[3] = ACK_TYPE;
	a_b[++length] = '\0';
	a_b[length] = tochar(chk1(&a_b[1]));
	a_b[++length] = his_eol;
	a_b[++length] = '\0';
	s1_sendpacket(a_b);
}

/* k_recv receives a OS Open image file over kermit line */
static int k_recv(void)
{
	char new_char;
	char k_state, k_state_saved;
	int sum;
	int done;
	int length;
	int n, last_n;
	int len_lo, len_hi;

	/* initialize some protocol parameters */
	his_eol = END_CHAR;		/* default end of line character */
	his_pad_count = 0;
	his_pad_char = '\0';
	his_quote = K_ESCAPE;

	/* initialize the k_recv and k_data state machine */
	done = 0;
	k_state = 0;
	k_data_init();
	k_state_saved = k_state;
	k_data_save();
	n = 0;				/* just to get rid of a warning */
	last_n = -1;

	/* expect this "type" sequence (but don't check):
	   S: send initiate
	   F: file header
	   D: data (multiple)
	   Z: end of file
	   B: break transmission
	 */

	/* enter main loop */
	while (!done) {
		/* set the send packet pointer to begining of send packet parms */
		send_ptr = send_parms;

		/* With each packet, start summing the bytes starting with the length.
		   Save the current sequence number.
		   Note the type of the packet.
		   If a character less than SPACE (0x20) is received - error.
		 */

#if 0
		/* OLD CODE, Prior to checking sequence numbers */
		/* first have all state machines save current states */
		k_state_saved = k_state;
		k_data_save ();
#endif

		/* get a packet */
		/* wait for the starting character or ^C */
		for (;;) {
			switch (getchar()) {
			case START_CHAR:	/* start packet */
				goto START;
			case ETX_CHAR:		/* ^C waiting for packet */
				return (0);
			default:
				;
			}
		}
START:
		/* get length of packet */
		sum = 0;
		new_char = getchar();
		if ((new_char & 0xE0) == 0)
			goto packet_error;
		sum += new_char & 0xff;
		length = untochar(new_char);
		/* get sequence number */
		new_char = getchar();
		if ((new_char & 0xE0) == 0)
			goto packet_error;
		sum += new_char & 0xff;
		n = untochar(new_char);
		--length;

		/* NEW CODE - check sequence numbers for retried packets */
		/* Note - this new code assumes that the sequence number is correctly
		 * received.  Handling an invalid sequence number adds another layer
		 * of complexity that may not be needed - yet!  At this time, I'm hoping
		 * that I don't need to buffer the incoming data packets and can write
		 * the data into memory in real time.
		 */
		if (n == last_n) {
			/* same sequence number, restore the previous state */
			k_state = k_state_saved;
			k_data_restore();
		} else {
			/* new sequence number, checkpoint the download */
			last_n = n;
			k_state_saved = k_state;
			k_data_save();
		}
		/* END NEW CODE */

		/* get packet type */
		new_char = getchar();
		if ((new_char & 0xE0) == 0)
			goto packet_error;
		sum += new_char & 0xff;
		k_state = new_char;
		--length;
		/* check for extended length */
		if (length == -2) {
			/* (length byte was 0, decremented twice) */
			/* get the two length bytes */
			new_char = getchar();
			if ((new_char & 0xE0) == 0)
				goto packet_error;
			sum += new_char & 0xff;
			len_hi = untochar(new_char);
			new_char = getchar();
			if ((new_char & 0xE0) == 0)
				goto packet_error;
			sum += new_char & 0xff;
			len_lo = untochar(new_char);
			length = len_hi * 95 + len_lo;
			/* check header checksum */
			new_char = getchar();
			if ((new_char & 0xE0) == 0)
				goto packet_error;
			if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
				goto packet_error;
			sum += new_char & 0xff;
/* --length; */ /* new length includes only data and block check to come */
		}
		/* bring in rest of packet */
		while (length > 1) {
			new_char = getchar();
			if ((new_char & 0xE0) == 0)
				goto packet_error;
			sum += new_char & 0xff;
			--length;
			if (k_state == DATA_TYPE) {
				/* pass on the data if this is a data packet */
				k_data_char (new_char);
			} else if (k_state == SEND_TYPE) {
				/* save send pack in buffer as is */
				*send_ptr++ = new_char;
				/* if too much data, back off the pointer */
				if (send_ptr >= &send_parms[SEND_DATA_SIZE])
					--send_ptr;
			}
		}
		/* get and validate checksum character */
		new_char = getchar();
		if ((new_char & 0xE0) == 0)
			goto packet_error;
		if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
			goto packet_error;
		/* get END_CHAR */
		new_char = getchar();
		if (new_char != END_CHAR) {
		  packet_error:
			/* restore state machines */
			k_state = k_state_saved;
			k_data_restore();
			/* send a negative acknowledge packet in */
			send_nack(n);
		} else if (k_state == SEND_TYPE) {
			/* crack the protocol parms, build an appropriate ack packet */
			handle_send_packet(n);
		} else {
			/* send simple acknowledge packet in */
			send_ack(n);
			/* quit if end of transmission */
			if (k_state == BREAK_TYPE)
				done = 1;
		}
	}
	return ((ulong) os_data_addr - (ulong) bin_start_address);
}

static int getcxmodem(void) {
	if (tstc())
		return (getchar());
	return -1;
}
static ulong load_serial_ymodem(ulong offset, int mode)
{
	int size;
	int err;
	int res;
	connection_info_t info;
	char ymodemBuf[1024];
	ulong store_addr = ~0;
	ulong addr = 0;

	size = 0;
	info.mode = mode;
	res = xyzModem_stream_open(&info, &err);
	if (!res) {

		err = 0;
		while ((res =
			xyzModem_stream_read(ymodemBuf, 1024, &err)) > 0) {
			store_addr = addr + offset;
			size += res;
			addr += res;
#ifdef CONFIG_MTD_NOR_FLASH
			if (addr2info(store_addr)) {
				int rc;

				rc = flash_write((char *) ymodemBuf,
						  store_addr, res);
				if (rc != 0) {
					xyzModem_stream_terminate(true, &getcxmodem);
					xyzModem_stream_close(&err);
					printf("\n");
					flash_perror(rc);
					return (~0);
				}
			} else
#endif
			{
				memcpy((char *)(store_addr), ymodemBuf,
					res);
			}

		}
		if (err) {
			xyzModem_stream_terminate((err == xyzModem_cancel) ? false : true, &getcxmodem);
			xyzModem_stream_close(&err);
			printf("\n%s\n", xyzModem_error(err));
			return (~0); /* Download aborted */
		}

		if (IS_ENABLED(CONFIG_CMD_BOOTEFI))
			efi_set_bootdev("Uart", "", "",
					map_sysmem(offset, 0), size);

	} else {
		printf("\n%s\n", xyzModem_error(err));
		return (~0); /* Download aborted */
	}

	xyzModem_stream_terminate(false, &getcxmodem);
	xyzModem_stream_close(&err);


	flush_cache(offset, ALIGN(size, ARCH_DMA_MINALIGN));

	printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
	env_set_hex("filesize", size);

	return offset;
}

#endif

#if defined(CONFIG_CMD_LOADM)
static int do_load_memory_bin(struct cmd_tbl *cmdtp, int flag, int argc,
			      char *const argv[])
{
	ulong	addr, dest, size;
	void	*src, *dst;

	if (argc != 4)
		return CMD_RET_USAGE;

	addr = simple_strtoul(argv[1], NULL, 16);

	dest = simple_strtoul(argv[2], NULL, 16);

	size = simple_strtoul(argv[3], NULL, 16);

	if (!size) {
		printf("loadm: can not load zero bytes\n");
		return 1;
	}

	src = map_sysmem(addr, size);
	dst = map_sysmem(dest, size);

	memcpy(dst, src, size);

	unmap_sysmem(src);
	unmap_sysmem(dst);

	if (IS_ENABLED(CONFIG_CMD_BOOTEFI))
		efi_set_bootdev("Mem", "", "", map_sysmem(dest, 0), size);

	printf("loaded bin to memory: size: %lu\n", size);

	return 0;
}
#endif

/* -------------------------------------------------------------------- */

#if defined(CONFIG_CMD_LOADS)

#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
U_BOOT_CMD(
	loads, 3, 0,	do_load_serial,
	"load S-Record file over serial line",
	"[ off ] [ baud ]\n"
	"    - load S-Record file over serial line"
	" with offset 'off' and baudrate 'baud'"
);

#else	/* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
U_BOOT_CMD(
	loads, 2, 0,	do_load_serial,
	"load S-Record file over serial line",
	"[ off ]\n"
	"    - load S-Record file over serial line with offset 'off'"
);
#endif	/* CONFIG_SYS_LOADS_BAUD_CHANGE */

/*
 * SAVES always requires LOADS support, but not vice versa
 */


#if defined(CONFIG_CMD_SAVES)
#ifdef	CONFIG_SYS_LOADS_BAUD_CHANGE
U_BOOT_CMD(
	saves, 4, 0,	do_save_serial,
	"save S-Record file over serial line",
	"[ off ] [size] [ baud ]\n"
	"    - save S-Record file over serial line"
	" with offset 'off', size 'size' and baudrate 'baud'"
);
#else	/* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
U_BOOT_CMD(
	saves, 3, 0,	do_save_serial,
	"save S-Record file over serial line",
	"[ off ] [size]\n"
	"    - save S-Record file over serial line with offset 'off' and size 'size'"
);
#endif	/* CONFIG_SYS_LOADS_BAUD_CHANGE */
#endif	/* CONFIG_CMD_SAVES */
#endif	/* CONFIG_CMD_LOADS */


#if defined(CONFIG_CMD_LOADB)
U_BOOT_CMD(
	loadb, 3, 0,	do_load_serial_bin,
	"load binary file over serial line (kermit mode)",
	"[ addr [ baud ] ]\n"
	"    - load binary file over serial line"
	" at address 'addr' with baudrate 'baud'"
);

U_BOOT_CMD(
	loadx, 3, 0,	do_load_serial_bin,
	"load binary file over serial line (xmodem mode)",
	"[ addr [ baud ] ]\n"
	"    - load binary file over serial line"
	" at address 'addr' with baudrate 'baud'"
);

U_BOOT_CMD(
	loady, 3, 0,	do_load_serial_bin,
	"load binary file over serial line (ymodem mode)",
	"[ addr [ baud ] ]\n"
	"    - load binary file over serial line"
	" at address 'addr' with baudrate 'baud'"
);

#endif	/* CONFIG_CMD_LOADB */

#if defined(CONFIG_CMD_LOADM)
U_BOOT_CMD(
	loadm, 4, 0,	do_load_memory_bin,
	"load binary blob from source address to destination address",
	"[src_addr] [dst_addr] [size]\n"
	"     - load a binary blob from one memory location to other"
	" from src_addr to dst_addr by size bytes"
);
#endif /* CONFIG_CMD_LOADM */