[people/ms/u-boot.git] / board / gateworks / gw_ventana / eeprom.c

/*
 * Copyright (C) 2014 Gateworks Corporation
 * Author: Tim Harvey <tharvey@gateworks.com>
 *
 * SPDX-License-Identifier: GPL-2.0+
 */

#include <common.h>
#include <errno.h>
#include <i2c.h>
#include <malloc.h>
#include <asm/bitops.h>

#include "gsc.h"
#include "ventana_eeprom.h"

/* read ventana EEPROM, check for validity, and return baseboard type */
int
read_eeprom(int bus, struct ventana_board_info *info)
{
	int i;
	int chksum;
	char baseboard;
	int type;
	unsigned char *buf = (unsigned char *)info;

	memset(info, 0, sizeof(*info));

	/*
	 * On a board with a missing/depleted backup battery for GSC, the
	 * board may be ready to probe the GSC before its firmware is
	 * running.  We will wait here indefinately for the GSC/EEPROM.
	 */
	while (1) {
		if (0 == i2c_set_bus_num(bus) &&
		    0 == i2c_probe(GSC_EEPROM_ADDR))
			break;
		mdelay(1);
	}

	/* read eeprom config section */
	if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
		puts("EEPROM: Failed to read EEPROM\n");
		return GW_UNKNOWN;
	}

	/* sanity checks */
	if (info->model[0] != 'G' || info->model[1] != 'W') {
		puts("EEPROM: Invalid Model in EEPROM\n");
		return GW_UNKNOWN;
	}

	/* validate checksum */
	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
		chksum += buf[i];
	if ((info->chksum[0] != chksum>>8) ||
	    (info->chksum[1] != (chksum&0xff))) {
		puts("EEPROM: Failed EEPROM checksum\n");
		return GW_UNKNOWN;
	}

	/* original GW5400-A prototype */
	baseboard = info->model[3];
	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
		baseboard = '0';

	type = GW_UNKNOWN;
	switch (baseboard) {
	case '0': /* original GW5400-A prototype */
		type = GW54proto;
		break;
	case '1':
		type = GW51xx;
		break;
	case '2':
		type = GW52xx;
		break;
	case '3':
		type = GW53xx;
		break;
	case '4':
		type = GW54xx;
		break;
	case '5':
		if (info->model[4] == '1') {
			type = GW551x;
			break;
		} else if (info->model[4] == '2') {
			type = GW552x;
			break;
		} else if (info->model[4] == '3') {
			type = GW553x;
			break;
		}
		break;
	case '6':
		if (info->model[4] == '0')
			type = GW560x;
		break;
	case '9':
		if (info->model[4] == '0' && info->model[5] == '4')
			type = GW5904;
		break;
	}
	return type;
}

/* list of config bits that the bootloader will remove from dtb if not set */
struct ventana_eeprom_config econfig[] = {
	{ "eth0", "ethernet0", EECONFIG_ETH0 },
	{ "usb0", NULL, EECONFIG_USB0 },
	{ "usb1", NULL, EECONFIG_USB1 },
	{ "mmc0", NULL, EECONFIG_SD0 },
	{ "mmc1", NULL, EECONFIG_SD1 },
	{ "mmc2", NULL, EECONFIG_SD2 },
	{ "mmc3", NULL, EECONFIG_SD3 },
	{ /* Sentinel */ }
};

#ifdef CONFIG_CMD_EECONFIG
static struct ventana_eeprom_config *get_config(const char *name)
{
	struct ventana_eeprom_config *cfg = econfig;

	while (cfg->name) {
		if (0 == strcmp(name, cfg->name))
			return cfg;
		cfg++;
	}
	return NULL;
}

static u8 econfig_bytes[sizeof(ventana_info.config)];
static int econfig_init = -1;

int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	struct ventana_eeprom_config *cfg;
	struct ventana_board_info *info = &ventana_info;
	int i;

	if (argc < 2)
		return CMD_RET_USAGE;

	/* initialize */
	if (econfig_init != 1) {
		memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
		econfig_init = 1;
	}

	/* list configs */
	if ((strncmp(argv[1], "list", 4) == 0)) {
		cfg = econfig;
		while (cfg->name) {
			printf("%s: %d\n", cfg->name,
			       test_bit(cfg->bit, econfig_bytes) ?  1 : 0);
			cfg++;
		}
	}

	/* save */
	else if ((strncmp(argv[1], "save", 4) == 0)) {
		unsigned char *buf = (unsigned char *)info;
		int chksum;

		/* calculate new checksum */
		memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
		for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
			chksum += buf[i];
		debug("old chksum:0x%04x\n",
		      (info->chksum[0] << 8) | info->chksum[1]);
		debug("new chksum:0x%04x\n", chksum);
		info->chksum[0] = chksum >> 8;
		info->chksum[1] = chksum & 0xff;

		/* write new config data */
		if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info,
				  1, econfig_bytes, sizeof(econfig_bytes))) {
			printf("EEPROM: Failed updating config\n");
			return CMD_RET_FAILURE;
		}

		/* write new config data */
		if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info,
				  1, info->chksum, 2)) {
			printf("EEPROM: Failed updating checksum\n");
			return CMD_RET_FAILURE;
		}

		printf("Config saved to EEPROM\n");
	}

	/* get config */
	else if (argc == 2) {
		cfg = get_config(argv[1]);
		if (cfg) {
			printf("%s: %d\n", cfg->name,
			       test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
		} else {
			printf("invalid config: %s\n", argv[1]);
			return CMD_RET_FAILURE;
		}
	}

	/* set config */
	else if (argc == 3) {
		cfg = get_config(argv[1]);
		if (cfg) {
			if (simple_strtol(argv[2], NULL, 10)) {
				test_and_set_bit(cfg->bit, econfig_bytes);
				printf("Enabled %s\n", cfg->name);
			} else {
				test_and_clear_bit(cfg->bit, econfig_bytes);
				printf("Disabled %s\n", cfg->name);
			}
		} else {
			printf("invalid config: %s\n", argv[1]);
			return CMD_RET_FAILURE;
		}
	}

	else
		return CMD_RET_USAGE;

	return CMD_RET_SUCCESS;
}

U_BOOT_CMD(
	econfig, 3, 0, do_econfig,
	"EEPROM configuration",
	"list - list config\n"
	"save - save config to EEPROM\n"
	"<name> - get config 'name'\n"
	"<name> [0|1] - set config 'name' to value\n"
);

#endif /* CONFIG_CMD_EECONFIG */
Commit	Line	Data
1badf2f4 TH	1	/*
	2	* Copyright (C) 2014 Gateworks Corporation
	3	* Author: Tim Harvey <tharvey@gateworks.com>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
	8	#include <common.h>
9c0fe83e	9	#include <errno.h>
1badf2f4	10	#include <i2c.h>
9c0fe83e TH	11	#include <malloc.h>
9c0fe83e TH	12	#include <asm/bitops.h>
1badf2f4 TH	13
	14	#include "gsc.h"
	15	#include "ventana_eeprom.h"
	16
	17	/* read ventana EEPROM, check for validity, and return baseboard type */
	18	int
	19	read_eeprom(int bus, struct ventana_board_info *info)
	20	{
	21	int i;
	22	int chksum;
	23	char baseboard;
	24	int type;
	25	unsigned char buf = (unsigned char )info;
	26
	27	memset(info, 0, sizeof(*info));
	28
	29	/*
	30	* On a board with a missing/depleted backup battery for GSC, the
	31	* board may be ready to probe the GSC before its firmware is
	32	* running. We will wait here indefinately for the GSC/EEPROM.
	33	*/
	34	while (1) {
	35	if (0 == i2c_set_bus_num(bus) &&
	36	0 == i2c_probe(GSC_EEPROM_ADDR))
	37	break;
	38	mdelay(1);
	39	}
	40
	41	/* read eeprom config section */
	42	if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
	43	puts("EEPROM: Failed to read EEPROM\n");
1badf2f4 TH	44	return GW_UNKNOWN;
	45	}
	46
	47	/* sanity checks */
	48	if (info->model[0] != 'G' \|\| info->model[1] != 'W') {
	49	puts("EEPROM: Invalid Model in EEPROM\n");
1badf2f4 TH	50	return GW_UNKNOWN;
	51	}
	52
	53	/* validate checksum */
	54	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
	55	chksum += buf[i];
	56	if ((info->chksum[0] != chksum>>8) \|\|
	57	(info->chksum[1] != (chksum&0xff))) {
	58	puts("EEPROM: Failed EEPROM checksum\n");
1badf2f4 TH	59	return GW_UNKNOWN;
	60	}
	61
	62	/* original GW5400-A prototype */
	63	baseboard = info->model[3];
	64	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
	65	baseboard = '0';
	66
8d1a6ff8	67	type = GW_UNKNOWN;
1badf2f4 TH	68	switch (baseboard) {
	69	case '0': /* original GW5400-A prototype */
	70	type = GW54proto;
	71	break;
	72	case '1':
	73	type = GW51xx;
	74	break;
	75	case '2':
	76	type = GW52xx;
	77	break;
	78	case '3':
	79	type = GW53xx;
	80	break;
	81	case '4':
	82	type = GW54xx;
	83	break;
3aa22674	84	case '5':
75f21e31 TH	85	if (info->model[4] == '1') {
	86	type = GW551x;
	87	break;
	88	} else if (info->model[4] == '2') {
	89	type = GW552x;
	90	break;
385575bc TH	91	} else if (info->model[4] == '3') {
	92	type = GW553x;
	93	break;
75f21e31	94	}
8d1a6ff8	95	break;
94a1d6c6 TH	96	case '6':
	97	if (info->model[4] == '0')
	98	type = GW560x;
	99	break;
8d1a6ff8 TH	100	case '9':
	101	if (info->model[4] == '0' && info->model[5] == '4')
	102	type = GW5904;
1badf2f4 TH	103	break;
	104	}
	105	return type;
	106	}
9c0fe83e TH	107
	108	/* list of config bits that the bootloader will remove from dtb if not set */
	109	struct ventana_eeprom_config econfig[] = {
	110	{ "eth0", "ethernet0", EECONFIG_ETH0 },
9c0fe83e TH	111	{ "usb0", NULL, EECONFIG_USB0 },
	112	{ "usb1", NULL, EECONFIG_USB1 },
	113	{ "mmc0", NULL, EECONFIG_SD0 },
	114	{ "mmc1", NULL, EECONFIG_SD1 },
	115	{ "mmc2", NULL, EECONFIG_SD2 },
	116	{ "mmc3", NULL, EECONFIG_SD3 },
9c0fe83e TH	117	{ /* Sentinel */ }
	118	};
	119
	120	#ifdef CONFIG_CMD_EECONFIG
	121	static struct ventana_eeprom_config get_config(const char name)
	122	{
	123	struct ventana_eeprom_config *cfg = econfig;
	124
	125	while (cfg->name) {
	126	if (0 == strcmp(name, cfg->name))
	127	return cfg;
	128	cfg++;
	129	}
	130	return NULL;
	131	}
	132
	133	static u8 econfig_bytes[sizeof(ventana_info.config)];
	134	static int econfig_init = -1;
	135
	136	int do_econfig(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	137	{
	138	struct ventana_eeprom_config *cfg;
	139	struct ventana_board_info *info = &ventana_info;
	140	int i;
	141
	142	if (argc < 2)
	143	return CMD_RET_USAGE;
	144
	145	/* initialize */
	146	if (econfig_init != 1) {
	147	memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
	148	econfig_init = 1;
	149	}
	150
	151	/* list configs */
	152	if ((strncmp(argv[1], "list", 4) == 0)) {
	153	cfg = econfig;
	154	while (cfg->name) {
	155	printf("%s: %d\n", cfg->name,
	156	test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
	157	cfg++;
	158	}
	159	}
	160
	161	/* save */
	162	else if ((strncmp(argv[1], "save", 4) == 0)) {
	163	unsigned char buf = (unsigned char )info;
	164	int chksum;
	165
	166	/* calculate new checksum */
	167	memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
	168	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
	169	chksum += buf[i];
	170	debug("old chksum:0x%04x\n",
	171	(info->chksum[0] << 8) \| info->chksum[1]);
	172	debug("new chksum:0x%04x\n", chksum);
	173	info->chksum[0] = chksum >> 8;
	174	info->chksum[1] = chksum & 0xff;
	175
	176	/* write new config data */
	177	if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info,
	178	1, econfig_bytes, sizeof(econfig_bytes))) {
	179	printf("EEPROM: Failed updating config\n");
	180	return CMD_RET_FAILURE;
181	}
182
183	/* write new config data */
184	if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info,
185	1, info->chksum, 2)) {
186	printf("EEPROM: Failed updating checksum\n");
187	return CMD_RET_FAILURE;
188	}
189
190	printf("Config saved to EEPROM\n");
191	}
192
193	/* get config */
194	else if (argc == 2) {
195	cfg = get_config(argv[1]);
196	if (cfg) {
197	printf("%s: %d\n", cfg->name,
198	test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
199	} else {
200	printf("invalid config: %s\n", argv[1]);
201	return CMD_RET_FAILURE;
202	}
203	}
204
205	/* set config */
206	else if (argc == 3) {
207	cfg = get_config(argv[1]);
208	if (cfg) {
209	if (simple_strtol(argv[2], NULL, 10)) {
210	test_and_set_bit(cfg->bit, econfig_bytes);
211	printf("Enabled %s\n", cfg->name);
212	} else {
213	test_and_clear_bit(cfg->bit, econfig_bytes);
214	printf("Disabled %s\n", cfg->name);
215	}
216	} else {
217	printf("invalid config: %s\n", argv[1]);
218	return CMD_RET_FAILURE;
219	}
220	}
221
222	else
223	return CMD_RET_USAGE;
224
225	return CMD_RET_SUCCESS;
226	}
227
228	U_BOOT_CMD(
229	econfig, 3, 0, do_econfig,
230	"EEPROM configuration",
231	"list - list config\n"
232	"save - save config to EEPROM\n"
233	"<name> - get config 'name'\n"
234	"<name> [0\|1] - set config 'name' to value\n"
235	);
236
237	#endif /* CONFIG_CMD_EECONFIG */