summaryrefslogtreecommitdiffstats
path: root/commands/loadb.c
blob: 8da4b7357457c970c3086b0a6ab5c17a371c544b (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
/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Serial up- and download support
 */
#include <common.h>
#include <command.h>
#include <s_record.h>
#include <net.h>
#include <exports.h>
#include <xyzModem.h>

DECLARE_GLOBAL_DATA_PTR;

static ulong load_serial_ymodem (ulong offset);

#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))

extern int os_data_count;
extern int os_data_header[8];

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


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

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

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

	/* pre-set offset from $loadaddr */
	if ((s = getenv("loadaddr")) != NULL) {
		offset = simple_strtoul(s, NULL, 16);
	}

	load_baudrate = current_baudrate = gd->baudrate;

	if (argc >= 2) {
		offset = simple_strtoul(argv[1], NULL, 16);
	}
	if (argc == 3) {
		load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);

		/* 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);
		gd->baudrate = load_baudrate;
		serial_setbrg ();
		udelay(50000);
		for (;;) {
			if (getc() == '\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);

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

	return rcode;
}


static ulong load_serial_bin (ulong offset)
{
	int size, i;
	char buf[32];

	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()) {
			(void) getc();
		}
		udelay(1000);
	}

	flush_cache (offset, size);

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

	return offset;
}

void send_pad (void)
{
	int count = his_pad_count;

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

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

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

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

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

static char a_b[24];
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);
}

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);
}


/* os_data_* takes an OS Open image and puts it into memory, and
   puts the boot header in an array named os_data_header

   if image is binary, no header is stored in os_data_header.
*/
void (*os_data_init) (void);
void (*os_data_char) (char new_char);
static int os_data_state, os_data_state_saved;
int os_data_count;
static int os_data_count_saved;
static char *os_data_addr, *os_data_addr_saved;
static char *bin_start_address;
int os_data_header[8];
static void bin_data_init (void)
{
	os_data_state = 0;
	os_data_count = 0;
	os_data_addr = bin_start_address;
}
static void os_data_save (void)
{
	os_data_state_saved = os_data_state;
	os_data_count_saved = os_data_count;
	os_data_addr_saved = os_data_addr;
}
static void os_data_restore (void)
{
	os_data_state = os_data_state_saved;
	os_data_count = os_data_count_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;
		--os_data_count;
		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;
void k_data_init (void)
{
	k_data_escape = 0;
	os_data_init ();
}
void k_data_save (void)
{
	k_data_escape_saved = k_data_escape;
	os_data_save ();
}
void k_data_restore (void)
{
	k_data_escape = k_data_escape_saved;
	os_data_restore ();
}
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
char send_parms[SEND_DATA_SIZE];
char *send_ptr;

/* handle_send_packet interprits the protocol info and builds and
   sends an appropriate ack for what we can do */
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 z = 0;
	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.
		 */


		/* get a packet */
		/* wait for the starting character or ^C */
		for (;;) {
			switch (getc ()) {
			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 = getc ();
		if ((new_char & 0xE0) == 0)
			goto packet_error;
		sum += new_char & 0xff;
		length = untochar (new_char);
		/* get sequence number */
		new_char = getc ();
		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 = getc ();
		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 = getc ();
			if ((new_char & 0xE0) == 0)
				goto packet_error;
			sum += new_char & 0xff;
			len_hi = untochar (new_char);
			new_char = getc ();
			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 = getc ();
			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 = getc ();
			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 = getc ();
		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 = getc ();
		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;
		}
		++z;
	}
	return ((ulong) os_data_addr - (ulong) bin_start_address);
}

static int getcxmodem(void) {
	if (tstc())
		return (getc());
	return -1;
}
static ulong load_serial_ymodem (ulong offset)
{
	int size;
	char buf[32];
	int err;
	int res;
	connection_info_t info;
	char ymodemBuf[1024];
	ulong store_addr = ~0;
	ulong addr = 0;

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

		while ((res =
			xyzModem_stream_read (ymodemBuf, 1024, &err)) > 0) {
			store_addr = addr + offset;
			size += res;
			addr += res;
			memcpy ((char *) (store_addr), ymodemBuf, res);

		}
	} else {
		printf ("%s\n", xyzModem_error (err));
	}

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


	flush_cache (offset, size);

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

	return offset;
}

U_BOOT_CMD(
	loadb, 3, 0,	do_load_serial_bin,
	"loadb   - load binary file over serial line (kermit mode)\n",
	"[ off ] [ baud ]\n"
	"    - load binary file over serial line"
	" with offset 'off' and baudrate 'baud'\n"
);

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