2 * Copyright (C) 2014 Gateworks Corporation
3 * Author: Tim Harvey <tharvey@gateworks.com>
5 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/bitops.h>
15 #include "ventana_eeprom.h"
17 /* read ventana EEPROM, check for validity, and return baseboard type */
19 read_eeprom(int bus, struct ventana_board_info *info)
25 unsigned char *buf = (unsigned char *)info;
27 memset(info, 0, sizeof(*info));
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.
35 if (0 == i2c_set_bus_num(bus) &&
36 0 == i2c_probe(GSC_EEPROM_ADDR))
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");
48 if (info->model[0] != 'G' || info->model[1] != 'W') {
49 puts("EEPROM: Invalid Model in EEPROM\n");
53 /* validate checksum */
54 for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
56 if ((info->chksum[0] != chksum>>8) ||
57 (info->chksum[1] != (chksum&0xff))) {
58 puts("EEPROM: Failed EEPROM checksum\n");
62 /* original GW5400-A prototype */
63 baseboard = info->model[3];
64 if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
69 case '0': /* original GW5400-A prototype */
85 if (info->model[4] == '1') {
88 } else if (info->model[4] == '2') {
91 } else if (info->model[4] == '3') {
97 if (info->model[4] == '0')
101 if (info->model[4] == '0' && info->model[5] == '4')
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 },
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 },
120 #ifdef CONFIG_CMD_EECONFIG
121 static struct ventana_eeprom_config *get_config(const char *name)
123 struct ventana_eeprom_config *cfg = econfig;
126 if (0 == strcmp(name, cfg->name))
133 static u8 econfig_bytes[sizeof(ventana_info.config)];
134 static int econfig_init = -1;
136 int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
138 struct ventana_eeprom_config *cfg;
139 struct ventana_board_info *info = &ventana_info;
143 return CMD_RET_USAGE;
146 if (econfig_init != 1) {
147 memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
152 if ((strncmp(argv[1], "list", 4) == 0)) {
155 printf("%s: %d\n", cfg->name,
156 test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
162 else if ((strncmp(argv[1], "save", 4) == 0)) {
163 unsigned char *buf = (unsigned char *)info;
166 /* calculate new checksum */
167 memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
168 for (chksum = 0, i = 0; i < sizeof(*info)-2; 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;
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;
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;
190 printf("Config saved to EEPROM\n");
194 else if (argc == 2) {
195 cfg = get_config(argv[1]);
197 printf("%s: %d\n", cfg->name,
198 test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
200 printf("invalid config: %s\n", argv[1]);
201 return CMD_RET_FAILURE;
206 else if (argc == 3) {
207 cfg = get_config(argv[1]);
209 if (simple_strtol(argv[2], NULL, 10)) {
210 test_and_set_bit(cfg->bit, econfig_bytes);
211 printf("Enabled %s\n", cfg->name);
213 test_and_clear_bit(cfg->bit, econfig_bytes);
214 printf("Disabled %s\n", cfg->name);
217 printf("invalid config: %s\n", argv[1]);
218 return CMD_RET_FAILURE;
223 return CMD_RET_USAGE;
225 return CMD_RET_SUCCESS;
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"
237 #endif /* CONFIG_CMD_EECONFIG */