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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
239 lines
5.4 KiB
C
239 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#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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#if defined(CONFIG_CMD_EECONFIG) && !defined(CONFIG_SPL_BUILD)
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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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static 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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