/*
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* Copyright (C) 2014 Gateworks Corporation
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* Author: Tim Harvey <tharvey@gateworks.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <i2c.h>
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#include <malloc.h>
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#include <asm/bitops.h>
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#include "gsc.h"
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#include "ventana_eeprom.h"
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/* read ventana EEPROM, check for validity, and return baseboard type */
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int
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read_eeprom(int bus, struct ventana_board_info *info)
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{
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int i;
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int chksum;
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char baseboard;
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int type;
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unsigned char *buf = (unsigned char *)info;
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memset(info, 0, sizeof(*info));
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/*
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* On a board with a missing/depleted backup battery for GSC, the
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* board may be ready to probe the GSC before its firmware is
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* running. We will wait here indefinately for the GSC/EEPROM.
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*/
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while (1) {
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if (0 == i2c_set_bus_num(bus) &&
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0 == i2c_probe(GSC_EEPROM_ADDR))
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break;
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mdelay(1);
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}
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/* read eeprom config section */
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if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
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puts("EEPROM: Failed to read EEPROM\n");
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return GW_UNKNOWN;
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}
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/* sanity checks */
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if (info->model[0] != 'G' || info->model[1] != 'W') {
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puts("EEPROM: Invalid Model in EEPROM\n");
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return GW_UNKNOWN;
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}
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/* validate checksum */
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for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
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chksum += buf[i];
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if ((info->chksum[0] != chksum>>8) ||
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(info->chksum[1] != (chksum&0xff))) {
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puts("EEPROM: Failed EEPROM checksum\n");
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return GW_UNKNOWN;
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}
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/* original GW5400-A prototype */
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baseboard = info->model[3];
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if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
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baseboard = '0';
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type = GW_UNKNOWN;
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switch (baseboard) {
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case '0': /* original GW5400-A prototype */
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type = GW54proto;
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break;
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case '1':
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type = GW51xx;
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break;
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case '2':
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type = GW52xx;
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break;
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case '3':
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type = GW53xx;
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break;
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case '4':
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type = GW54xx;
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break;
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case '5':
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if (info->model[4] == '1') {
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type = GW551x;
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break;
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} else if (info->model[4] == '2') {
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type = GW552x;
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break;
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} else if (info->model[4] == '3') {
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type = GW553x;
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break;
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}
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break;
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case '6':
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if (info->model[4] == '0')
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type = GW560x;
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break;
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case '9':
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if (info->model[4] == '0' && info->model[5] == '3')
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type = GW5903;
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if (info->model[4] == '0' && info->model[5] == '4')
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type = GW5904;
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break;
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}
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return type;
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}
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/* list of config bits that the bootloader will remove from dtb if not set */
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struct ventana_eeprom_config econfig[] = {
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{ "eth0", "ethernet0", EECONFIG_ETH0 },
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{ "usb0", NULL, EECONFIG_USB0 },
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{ "usb1", NULL, EECONFIG_USB1 },
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{ "mmc0", NULL, EECONFIG_SD0 },
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{ "mmc1", NULL, EECONFIG_SD1 },
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{ "mmc2", NULL, EECONFIG_SD2 },
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{ "mmc3", NULL, EECONFIG_SD3 },
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{ /* Sentinel */ }
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};
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#ifdef CONFIG_CMD_EECONFIG
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static struct ventana_eeprom_config *get_config(const char *name)
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{
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struct ventana_eeprom_config *cfg = econfig;
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while (cfg->name) {
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if (0 == strcmp(name, cfg->name))
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return cfg;
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cfg++;
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}
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return NULL;
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}
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static u8 econfig_bytes[sizeof(ventana_info.config)];
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static int econfig_init = -1;
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int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct ventana_eeprom_config *cfg;
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struct ventana_board_info *info = &ventana_info;
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int i;
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if (argc < 2)
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return CMD_RET_USAGE;
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/* initialize */
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if (econfig_init != 1) {
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memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
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econfig_init = 1;
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}
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/* list configs */
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if ((strncmp(argv[1], "list", 4) == 0)) {
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cfg = econfig;
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while (cfg->name) {
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printf("%s: %d\n", cfg->name,
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test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
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cfg++;
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}
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}
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/* save */
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else if ((strncmp(argv[1], "save", 4) == 0)) {
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unsigned char *buf = (unsigned char *)info;
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int chksum;
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/* calculate new checksum */
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memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
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for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
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chksum += buf[i];
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debug("old chksum:0x%04x\n",
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(info->chksum[0] << 8) | info->chksum[1]);
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debug("new chksum:0x%04x\n", chksum);
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info->chksum[0] = chksum >> 8;
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info->chksum[1] = chksum & 0xff;
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/* write new config data */
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if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info,
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1, econfig_bytes, sizeof(econfig_bytes))) {
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printf("EEPROM: Failed updating config\n");
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return CMD_RET_FAILURE;
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}
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/* write new config data */
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if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info,
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1, info->chksum, 2)) {
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printf("EEPROM: Failed updating checksum\n");
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return CMD_RET_FAILURE;
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}
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printf("Config saved to EEPROM\n");
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}
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/* get config */
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else if (argc == 2) {
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cfg = get_config(argv[1]);
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if (cfg) {
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printf("%s: %d\n", cfg->name,
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test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
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} else {
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printf("invalid config: %s\n", argv[1]);
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return CMD_RET_FAILURE;
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}
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}
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/* set config */
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else if (argc == 3) {
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cfg = get_config(argv[1]);
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if (cfg) {
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if (simple_strtol(argv[2], NULL, 10)) {
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test_and_set_bit(cfg->bit, econfig_bytes);
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printf("Enabled %s\n", cfg->name);
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} else {
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test_and_clear_bit(cfg->bit, econfig_bytes);
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printf("Disabled %s\n", cfg->name);
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}
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} else {
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printf("invalid config: %s\n", argv[1]);
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return CMD_RET_FAILURE;
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}
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}
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else
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return CMD_RET_USAGE;
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return CMD_RET_SUCCESS;
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}
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U_BOOT_CMD(
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econfig, 3, 0, do_econfig,
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"EEPROM configuration",
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"list - list config\n"
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"save - save config to EEPROM\n"
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"<name> - get config 'name'\n"
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"<name> [0|1] - set config 'name' to value\n"
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);
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#endif /* CONFIG_CMD_EECONFIG */
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