[z180-stamp.git] / avr / cmd_loadihex.c

/*
 * (C) Copyright 2015 Leo C. <erbl259-lmu@yahoo.de>
 *
 * SPDX-License-Identifier:	GPL-2.0
 */

#include "cmd_loadihex.h"
#include <ctype.h>

#include "con-utils.h"
#include "z80-if.h"
#include "debug.h"


uint32_t detect_ramsize(void)
{
	uint32_t addr;
	uint8_t save_addr, save_0;
	const uint8_t PATTERN_1	= 0x55;
	const uint8_t PATTERN_2	= ~PATTERN_1;

	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
		my_puts_P(PSTR("Bus timeout\n"));
		return  0;
	}

	save_0 = z80_read(0);
	z80_write(0, PATTERN_1);

	for (addr=1; addr < CONFIG_SYS_RAMSIZE_MAX; addr <<= 1) {
		save_addr = z80_read(addr);
		z80_write(addr, PATTERN_2);
		if (z80_read(0) != PATTERN_1 || z80_read(addr) != PATTERN_2)
			break;
		z80_write(addr, save_addr);
	}
	z80_write(0, save_0);
	z80_bus_cmd(Release);

	return addr;
}

typedef enum {
	IHX_OK,
	IHX_BROKEN,
	IHX_CHKSUMERR
} ihx_rstat_t;

typedef struct {
	ihx_rstat_t status;
	int8_t type;
	uint8_t len;
	uint16_t address;
	uint8_t data[256];
} ihex_t;


static int get_hexdigit(void)
{
	int c;
	c = toupper(my_getchar(1));
	if (isxdigit(c)) {
		c -= '0';
		if (c > 9)
			c -= ('A' - '0' - 10);
		return c;
	} else
		return -1;
}

static int get_hexbyte(void)
{
	uint8_t i,j;

	if ((i = (uint8_t) get_hexdigit()) < 0x10)
		if ((j = (uint8_t) get_hexdigit()) < 0x10) {
			return (i<<4) + j;
		}

	return -1;
}


static int ihex_get_record(ihex_t *rec)
{
	int c;
	uint8_t sum;

	rec->status = IHX_BROKEN;
	rec->len = 0;
	rec->type = 0xff;

	while ((c = my_getchar(0)) != ':') {
		if (c == 0x03)
			return -1;					/* Control-C */
		if (c == 0x04) {
			rec->status = IHX_OK;
			return 0;					/*Control-D, EOF */
		}
	}

	if ((c = get_hexbyte()) < 0)		/* Start code */
			return -1;
	sum = c;
	rec->len = c;
	if ((c = get_hexbyte()) < 0)		/* Byte Count */
			return -1;
	sum += c;
	rec->address = c * 256;
	if ((c = get_hexbyte()) < 0)		/* Address */
			return -1;
	sum += c;
	rec->address += c;
	if ((c = get_hexbyte()) < 0)		/* Record type */
		return -1;
	sum += c;
	rec->type = c;

	if (rec->len) {						/* Record Data */
		uint8_t n;

		for (n = 0; n < rec->len; n++) {
			if ((c = get_hexbyte()) < 0)
				break;
			sum += c;
			rec->data[n] = c;
		}

		if (n < rec->len) {
			return -1;
		}
	}

	c = get_hexbyte();				/* Check sum */

	if (c >= 0) {
		sum += c;
		if (sum == 0)
			rec->status = IHX_OK;
		else
			rec->status = IHX_CHKSUMERR;
	}

	return rec->len;
}


command_ret_t do_loadihex(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc, char * const argv[])
{
	long offset = 0;
	uint32_t base_address = 0;
	uint32_t address_max = detect_ramsize();
	uint32_t address_high = 0;
	uint32_t address_low = address_max;
	bool firstrec = true;
	ihex_t rec;

	if (argc > 1)
		offset = strtol(argv[1], NULL, 16);

	my_puts_P(PSTR("Waiting for Intel Hex Records...\n"));

	while (ihex_get_record(&rec) > 0 &&
				rec.status == IHX_OK &&
				rec.type != 1 ) {

		switch (rec.type) {
		case 0: /* Data record */
			if (firstrec) {
				my_puts_P(PSTR("Loading: 0x....."));
				firstrec = false;
			}
			if (rec.len) {
				uint32_t addr = base_address + rec.address + offset;
				if (addr < address_low)
					address_low = addr;
				if (addr+rec.len > address_high)
					address_high = addr + rec.len;

//				debug("low: 0x%.5lX, high: 0x%.5lX, max: 0x%.5lX, addr: 0x%.5lX, len: %d\n",
//					address_low, address_high, address_max, addr, rec.len);
				printf_P(PSTR("\b\b\b\b\b%.5lX"), addr);
				if (addr < address_max) {
					uint32_t tmplen = address_max - addr;
					if (rec.len > tmplen)
						rec.len = tmplen;

					if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
						cmd_error(CMD_RET_FAILURE, EBUSTO, NULL);
						//my_puts_P(PSTR("Bus timeout\n"));
						//return  CMD_RET_FAILURE;
					}
					z80_write_block(rec.data,		/* src */
							addr,					/* dest */
							rec.len);				/* len */
					z80_bus_cmd(Release);
				}
			}
			break;

#if 0
		case 1: /* EOF record */
			break;
#endif
		case 2: /* Extended Segment Address Record */
			base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 4;
			break;

		case 4: /* Extended Linear Address Record */
			base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 16;
			break;

		case 3: /* Start Segment Address Record (ignored)*/
		case 5: /* Start Linear Address Record (ignored)*/
			break;

		}
	}

	if (rec.status != IHX_OK)
		my_puts_P(PSTR("Broken Hex Record or loading interrupted!\n"));

	for (uint_fast8_t i=0; i<100; ++i) {
		/* flush input buffer */
		while (my_getchar(0) > 0)
			;
		udelay(1000);
	}

	my_puts_P(PSTR("\nData loaded: "));
	if (address_low >= MIN(address_high, address_max))
		my_puts_P(PSTR("None.\n"));
	else
		printf_P(PSTR("low: 0x%.5lX high: 0x%.5lX\n"), address_low,
				MIN(address_high, address_max) - 1);

	if (address_high > address_max)
		printf_P(PSTR("Data above highest RAM address "
			"(in range 0x%.5lX - 0x%.5lX) ignored!\n"), address_max, address_high - 1);

	return rec.status == IHX_OK ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
}
Commit	Line	Data
179bc609 L	1	/*
	2	* (C) Copyright 2015 Leo C. <erbl259-lmu@yahoo.de>
	3	*
fcf1d5b3	4	* SPDX-License-Identifier: GPL-2.0
179bc609 L	5	*/
179bc609 L	6
7eecbdac	7	#include "cmd_loadihex.h"
179bc609	8	#include <ctype.h>
179bc609	9
179bc609 L	10	#include "con-utils.h"
179bc609 L	11	#include "z80-if.h"
d264541a	12	#include "debug.h"
179bc609 L	13
179bc609 L	14
5480dc65 L	15	uint32_t detect_ramsize(void)
	16	{
	17	uint32_t addr;
	18	uint8_t save_addr, save_0;
	19	const uint8_t PATTERN_1 = 0x55;
	20	const uint8_t PATTERN_2 = ~PATTERN_1;
	21
	22	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
	23	my_puts_P(PSTR("Bus timeout\n"));
	24	return 0;
	25	}
	26
	27	save_0 = z80_read(0);
	28	z80_write(0, PATTERN_1);
	29
	30	for (addr=1; addr < CONFIG_SYS_RAMSIZE_MAX; addr <<= 1) {
	31	save_addr = z80_read(addr);
	32	z80_write(addr, PATTERN_2);
	33	if (z80_read(0) != PATTERN_1 \|\| z80_read(addr) != PATTERN_2)
	34	break;
	35	z80_write(addr, save_addr);
	36	}
	37	z80_write(0, save_0);
	38	z80_bus_cmd(Release);
	39
	40	return addr;
	41	}
	42
179bc609 L	43	typedef enum {
	44	IHX_OK,
	45	IHX_BROKEN,
	46	IHX_CHKSUMERR
	47	} ihx_rstat_t;
	48
	49	typedef struct {
	50	ihx_rstat_t status;
	51	int8_t type;
	52	uint8_t len;
	53	uint16_t address;
5480dc65	54	uint8_t data[256];
179bc609 L	55	} ihex_t;
	56
	57
1633073f L	58	static int get_hexdigit(void)
1633073f L	59	{
179bc609 L	60	int c;
	61	c = toupper(my_getchar(1));
	62	if (isxdigit(c)) {
	63	c -= '0';
	64	if (c > 9)
	65	c -= ('A' - '0' - 10);
	66	return c;
	67	} else
	68	return -1;
	69	}
	70
1633073f L	71	static int get_hexbyte(void)
1633073f L	72	{
179bc609 L	73	uint8_t i,j;
	74
	75	if ((i = (uint8_t) get_hexdigit()) < 0x10)
	76	if ((j = (uint8_t) get_hexdigit()) < 0x10) {
	77	return (i<<4) + j;
	78	}
	79
	80	return -1;
	81	}
	82
5480dc65	83
1633073f L	84	static int ihex_get_record(ihex_t *rec)
1633073f L	85	{
5480dc65 L	86	int c;
	87	uint8_t sum;
	88
	89	rec->status = IHX_BROKEN;
bf587043 L	90	rec->len = 0;
bf587043 L	91	rec->type = 0xff;
5480dc65	92
bf587043	93	while ((c = my_getchar(0)) != ':') {
5480dc65	94	if (c == 0x03)
bf587043 L	95	return -1; /* Control-C */
	96	if (c == 0x04) {
	97	rec->status = IHX_OK;
	98	return 0; /Control-D, EOF /
	99	}
	100	}
5480dc65 L	101
	102	if ((c = get_hexbyte()) < 0) /* Start code */
	103	return -1;
	104	sum = c;
	105	rec->len = c;
	106	if ((c = get_hexbyte()) < 0) /* Byte Count */
	107	return -1;
	108	sum += c;
	109	rec->address = c * 256;
	110	if ((c = get_hexbyte()) < 0) /* Address */
	111	return -1;
	112	sum += c;
	113	rec->address += c;
	114	if ((c = get_hexbyte()) < 0) /* Record type */
	115	return -1;
	116	sum += c;
	117	rec->type = c;
	118
	119	if (rec->len) { /* Record Data */
	120	uint8_t n;
	121
	122	for (n = 0; n < rec->len; n++) {
	123	if ((c = get_hexbyte()) < 0)
	124	break;
	125	sum += c;
	126	rec->data[n] = c;
	127	}
	128
	129	if (n < rec->len) {
	130	return -1;
	131	}
	132	}
	133
	134	c = get_hexbyte(); /* Check sum */
	135
	136	if (c >= 0) {
	137	sum += c;
	138	if (sum == 0)
	139	rec->status = IHX_OK;
	140	else
	141	rec->status = IHX_CHKSUMERR;
	142	}
	143
	144	return rec->len;
	145	}
	146
179bc609	147
1633073f	148	command_ret_t do_loadihex(cmd_tbl_t cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc, char const argv[])
179bc609 L	149	{
	150	long offset = 0;
	151	uint32_t base_address = 0;
5480dc65	152	uint32_t address_max = detect_ramsize();
179bc609	153	uint32_t address_high = 0;
5480dc65	154	uint32_t address_low = address_max;
bf587043	155	bool firstrec = true;
1633073f	156	ihex_t rec;
5480dc65	157
179bc609 L	158	if (argc > 1)
	159	offset = strtol(argv[1], NULL, 16);
	160
1633073f	161	my_puts_P(PSTR("Waiting for Intel Hex Records...\n"));
bf587043	162
5480dc65 L	163	while (ihex_get_record(&rec) > 0 &&
	164	rec.status == IHX_OK &&
	165	rec.type != 1 ) {
	166
	167	switch (rec.type) {
	168	case 0: /* Data record */
bf587043	169	if (firstrec) {
1633073f	170	my_puts_P(PSTR("Loading: 0x....."));
bf587043 L	171	firstrec = false;
bf587043 L	172	}
5480dc65 L	173	if (rec.len) {
	174	uint32_t addr = base_address + rec.address + offset;
	175	if (addr < address_low)
	176	address_low = addr;
	177	if (addr+rec.len > address_high)
	178	address_high = addr + rec.len;
179bc609	179
d264541a L	180	// debug("low: 0x%.5lX, high: 0x%.5lX, max: 0x%.5lX, addr: 0x%.5lX, len: %d\n",
d264541a L	181	// address_low, address_high, address_max, addr, rec.len);
bf587043	182	printf_P(PSTR("\b\b\b\b\b%.5lX"), addr);
5480dc65 L	183	if (addr < address_max) {
	184	uint32_t tmplen = address_max - addr;
	185	if (rec.len > tmplen)
	186	rec.len = tmplen;
	187
	188	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
1633073f L	189	cmd_error(CMD_RET_FAILURE, EBUSTO, NULL);
	190	//my_puts_P(PSTR("Bus timeout\n"));
	191	//return CMD_RET_FAILURE;
5480dc65	192	}
179bc609 L	193	z80_write_block(rec.data, /* src */
	194	addr, /* dest */
	195	rec.len); /* len */
	196	z80_bus_cmd(Release);
	197	}
179bc609	198	}
5480dc65	199	break;
179bc609	200
5480dc65 L	201	#if 0
	202	case 1: /* EOF record */
	203	break;
	204	#endif
	205	case 2: /* Extended Segment Address Record */
d264541a	206	base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 4;
5480dc65	207	break;
ae017d4c	208
5480dc65 L	209	case 4: /* Extended Linear Address Record */
	210	base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 16;
	211	break;
ae017d4c	212
5480dc65 L	213	case 3: /* Start Segment Address Record (ignored)*/
	214	case 5: /* Start Linear Address Record (ignored)*/
	215	break;
	216
	217	}
179bc609 L	218	}
179bc609 L	219
1633073f L	220	if (rec.status != IHX_OK)
1633073f L	221	my_puts_P(PSTR("Broken Hex Record or loading interrupted!\n"));
4cbc8d3e	222
bf587043 L	223	for (uint_fast8_t i=0; i<100; ++i) {
	224	/* flush input buffer */
	225	while (my_getchar(0) > 0)
	226	;
	227	udelay(1000);
	228	}
	229
1633073f	230	my_puts_P(PSTR("\nData loaded: "));
d264541a	231	if (address_low >= MIN(address_high, address_max))
1633073f	232	my_puts_P(PSTR("None.\n"));
179bc609	233	else
5480dc65	234	printf_P(PSTR("low: 0x%.5lX high: 0x%.5lX\n"), address_low,
d264541a	235	MIN(address_high, address_max) - 1);
5480dc65 L	236
	237	if (address_high > address_max)
	238	printf_P(PSTR("Data above highest RAM address "
d264541a	239	"(in range 0x%.5lX - 0x%.5lX) ignored!\n"), address_max, address_high - 1);
179bc609	240
1633073f	241	return rec.status == IHX_OK ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
179bc609	242	}