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

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

#include "common.h"
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>

#include "command.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;


	while ((c = my_getchar(0)) != ':')
		if (c == 0x03)
			return -1;

	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, int flag, 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;
	command_ret_t rcode = CMD_RET_FAILURE;
	ihex_t rec;

	(void) cmdtp; (void) flag;


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

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

		switch (rec.type) {
		case 0: /* Data record */
			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);

				if (addr < address_max) {
					uint32_t tmplen = address_max - addr;
					if (rec.len > tmplen)
						rec.len = tmplen;

					if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
						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;

		}
	}

	switch (rec.status) {
	case IHX_OK:
		rcode = CMD_RET_SUCCESS;
		break;

	case IHX_BROKEN:
	case IHX_CHKSUMERR:
		printf_P(PSTR("Broken Hex Record or loading interrupted!\n"));
		break;
	}

	printf_P(PSTR("Data loaded: "));
	if (address_low >= MIN(address_high, address_max))
		printf_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 rcode;
}
Commit	Line	Data
179bc609 L	1	/*
	2	* (C) Copyright 2015 Leo C. <erbl259-lmu@yahoo.de>
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	#include "common.h"
	8	#include <stdlib.h>
	9	#include <ctype.h>
	10	#include <stdbool.h>
	11
	12	#include "command.h"
	13	#include "con-utils.h"
	14	#include "z80-if.h"
d264541a	15	#include "debug.h"
179bc609 L	16
179bc609 L	17
5480dc65 L	18	uint32_t detect_ramsize(void)
	19	{
	20	uint32_t addr;
	21	uint8_t save_addr, save_0;
	22	const uint8_t PATTERN_1 = 0x55;
	23	const uint8_t PATTERN_2 = ~PATTERN_1;
	24
	25	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
	26	my_puts_P(PSTR("Bus timeout\n"));
	27	return 0;
	28	}
	29
	30	save_0 = z80_read(0);
	31	z80_write(0, PATTERN_1);
	32
	33	for (addr=1; addr < CONFIG_SYS_RAMSIZE_MAX; addr <<= 1) {
	34	save_addr = z80_read(addr);
	35	z80_write(addr, PATTERN_2);
	36	if (z80_read(0) != PATTERN_1 \|\| z80_read(addr) != PATTERN_2)
	37	break;
	38	z80_write(addr, save_addr);
	39	}
	40	z80_write(0, save_0);
	41	z80_bus_cmd(Release);
	42
	43	return addr;
	44	}
	45
179bc609 L	46	typedef enum {
	47	IHX_OK,
	48	IHX_BROKEN,
	49	IHX_CHKSUMERR
	50	} ihx_rstat_t;
	51
	52	typedef struct {
	53	ihx_rstat_t status;
	54	int8_t type;
	55	uint8_t len;
	56	uint16_t address;
5480dc65	57	uint8_t data[256];
179bc609 L	58	} ihex_t;
	59
	60
	61	static
	62	int get_hexdigit(void) {
	63
	64	int c;
	65	c = toupper(my_getchar(1));
	66	if (isxdigit(c)) {
	67	c -= '0';
	68	if (c > 9)
	69	c -= ('A' - '0' - 10);
	70	return c;
	71	} else
	72	return -1;
	73	}
	74
	75	static
	76	int get_hexbyte(void) {
	77
	78	uint8_t i,j;
	79
	80	if ((i = (uint8_t) get_hexdigit()) < 0x10)
	81	if ((j = (uint8_t) get_hexdigit()) < 0x10) {
	82	return (i<<4) + j;
	83	}
	84
	85	return -1;
	86	}
	87
5480dc65 L	88
	89	static
	90	int ihex_get_record(ihex_t *rec) {
	91
	92	int c;
	93	uint8_t sum;
	94
	95	rec->status = IHX_BROKEN;
	96
	97
	98	while ((c = my_getchar(0)) != ':')
	99	if (c == 0x03)
	100	return -1;
	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 L	147
	148	command_ret_t do_loadihex(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	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;
179bc609 L	155	command_ret_t rcode = CMD_RET_FAILURE;
	156	ihex_t rec;
	157
5480dc65 L	158	(void) cmdtp; (void) flag;
	159
	160
179bc609 L	161	if (argc > 1)
	162	offset = strtol(argv[1], NULL, 16);
	163
5480dc65 L	164	while (ihex_get_record(&rec) > 0 &&
	165	rec.status == IHX_OK &&
	166	rec.type != 1 ) {
	167
	168	switch (rec.type) {
	169	case 0: /* Data record */
	170	if (rec.len) {
	171	uint32_t addr = base_address + rec.address + offset;
	172	if (addr < address_low)
	173	address_low = addr;
	174	if (addr+rec.len > address_high)
	175	address_high = addr + rec.len;
179bc609	176
d264541a L	177	// debug("low: 0x%.5lX, high: 0x%.5lX, max: 0x%.5lX, addr: 0x%.5lX, len: %d\n",
d264541a L	178	// address_low, address_high, address_max, addr, rec.len);
5480dc65 L	179
	180	if (addr < address_max) {
	181	uint32_t tmplen = address_max - addr;
	182	if (rec.len > tmplen)
	183	rec.len = tmplen;
	184
	185	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
	186	my_puts_P(PSTR("Bus timeout\n"));
	187	return CMD_RET_FAILURE;
	188	}
179bc609 L	189	z80_write_block(rec.data, /* src */
	190	addr, /* dest */
	191	rec.len); /* len */
	192	z80_bus_cmd(Release);
	193	}
179bc609	194	}
5480dc65	195	break;
179bc609	196
5480dc65 L	197	#if 0
	198	case 1: /* EOF record */
	199	break;
	200	#endif
	201	case 2: /* Extended Segment Address Record */
d264541a	202	base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 4;
5480dc65	203	break;
ae017d4c	204
5480dc65 L	205	case 4: /* Extended Linear Address Record */
	206	base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 16;
	207	break;
ae017d4c	208
5480dc65 L	209	case 3: /* Start Segment Address Record (ignored)*/
	210	case 5: /* Start Linear Address Record (ignored)*/
	211	break;
	212
	213	}
179bc609 L	214	}
	215
	216	switch (rec.status) {
	217	case IHX_OK:
	218	rcode = CMD_RET_SUCCESS;
	219	break;
	220
	221	case IHX_BROKEN:
	222	case IHX_CHKSUMERR:
	223	printf_P(PSTR("Broken Hex Record or loading interrupted!\n"));
	224	break;
	225	}
	226
5480dc65	227	printf_P(PSTR("Data loaded: "));
d264541a	228	if (address_low >= MIN(address_high, address_max))
179bc609 L	229	printf_P(PSTR("None.\n"));
179bc609 L	230	else
5480dc65	231	printf_P(PSTR("low: 0x%.5lX high: 0x%.5lX\n"), address_low,
d264541a	232	MIN(address_high, address_max) - 1);
5480dc65 L	233
	234	if (address_high > address_max)
	235	printf_P(PSTR("Data above highest RAM address "
d264541a	236	"(in range 0x%.5lX - 0x%.5lX) ignored!\n"), address_max, address_high - 1);
179bc609 L	237
	238	return rcode;
	239	}