364 lines
9.2 KiB
C
364 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021 Gateworks Corporation
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*/
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#include <common.h>
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#include <gsc.h>
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#include <hexdump.h>
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#include <i2c.h>
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#include <dm/uclass.h>
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#include "eeprom.h"
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/* I2C */
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#define SOM_EEPROM_BUSNO 0
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#define SOM_EEPROM_ADDR 0x51
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#define BASEBOARD_EEPROM_BUSNO 1
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#define BASEBOARD_EEPROM_ADDR 0x52
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struct venice_board_info som_info;
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struct venice_board_info base_info;
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char venice_model[32];
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u32 venice_serial;
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/* return a mac address from EEPROM info */
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int eeprom_getmac(int index, uint8_t *address)
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{
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int i, j;
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u32 maclow, machigh;
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u64 mac;
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j = 0;
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if (som_info.macno) {
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maclow = som_info.mac[5];
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maclow |= som_info.mac[4] << 8;
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maclow |= som_info.mac[3] << 16;
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maclow |= som_info.mac[2] << 24;
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machigh = som_info.mac[1];
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machigh |= som_info.mac[0] << 8;
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mac = machigh;
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mac <<= 32;
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mac |= maclow;
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for (i = 0; i < som_info.macno; i++, j++) {
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if (index == j)
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goto out;
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}
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}
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maclow = base_info.mac[5];
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maclow |= base_info.mac[4] << 8;
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maclow |= base_info.mac[3] << 16;
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maclow |= base_info.mac[2] << 24;
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machigh = base_info.mac[1];
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machigh |= base_info.mac[0] << 8;
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mac = machigh;
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mac <<= 32;
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mac |= maclow;
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for (i = 0; i < base_info.macno; i++, j++) {
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if (index == j)
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goto out;
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}
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return -EINVAL;
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out:
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mac += i;
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address[0] = (mac >> 40) & 0xff;
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address[1] = (mac >> 32) & 0xff;
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address[2] = (mac >> 24) & 0xff;
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address[3] = (mac >> 16) & 0xff;
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address[4] = (mac >> 8) & 0xff;
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address[5] = (mac >> 0) & 0xff;
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return 0;
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}
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static int eeprom_read(int busno, int slave, int alen, struct venice_board_info *info)
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{
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int i;
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int chksum;
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unsigned char *buf = (unsigned char *)info;
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struct udevice *dev, *bus;
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int ret;
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/* probe device */
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ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
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if (ret)
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return ret;
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ret = dm_i2c_probe(bus, slave, 0, &dev);
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if (ret)
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return ret;
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/* read eeprom config section */
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memset(info, 0, sizeof(*info));
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ret = i2c_set_chip_offset_len(dev, alen);
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if (ret) {
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puts("EEPROM: Failed to set alen\n");
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return ret;
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}
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ret = dm_i2c_read(dev, 0x00, buf, sizeof(*info));
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if (ret) {
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if (slave == SOM_EEPROM_ADDR)
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printf("EEPROM: Failed to read EEPROM\n");
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return ret;
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}
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/* validate checksum */
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for (chksum = 0, i = 0; i < (int)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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printf("EEPROM: I2C%d@0x%02x: Invalid Checksum\n", busno, slave);
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print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
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memset(info, 0, sizeof(*info));
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return -EINVAL;
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}
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/* sanity check valid model */
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if (info->model[0] != 'G' || info->model[1] != 'W') {
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printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", busno, slave);
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print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
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memset(info, 0, sizeof(*info));
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return -EINVAL;
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}
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return 0;
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}
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/* determine BOM revision from model */
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int get_bom_rev(const char *str)
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{
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int rev_bom = 0;
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int i;
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for (i = strlen(str) - 1; i > 0; i--) {
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if (str[i] == '-')
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break;
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if (str[i] >= '1' && str[i] <= '9') {
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rev_bom = str[i] - '0';
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break;
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}
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}
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return rev_bom;
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}
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/* determine PCB revision from model */
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char get_pcb_rev(const char *str)
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{
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char rev_pcb = 'A';
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int i;
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for (i = strlen(str) - 1; i > 0; i--) {
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if (str[i] == '-')
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break;
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if (str[i] >= 'A') {
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rev_pcb = str[i];
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break;
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}
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}
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return rev_pcb;
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}
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/*
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* get dt name based on model and detail level:
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*
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* For boards that are a combination of a SoM plus a Baseboard:
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* Venice SoM part numbers are GW70xx where xx is:
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* 7000-7019: same PCB with som dt of '0x'
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* 7020-7039: same PCB with som dt of '2x'
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* 7040-7059: same PCB with som dt of '4x'
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* 7060-7079: same PCB with som dt of '6x'
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* 7080-7099: same PCB with som dt of '8x'
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* Venice Baseboard part numbers are GW7xxx where xxx is:
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* 7100-7199: same PCB with base dt of '71xx'
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* 7200-7299: same PCB with base dt of '72xx'
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* 7300-7399: same PCB with base dt of '73xx'
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* 7400-7499: same PCB with base dt of '74xx'
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* 7500-7599: same PCB with base dt of '75xx'
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* 7600-7699: same PCB with base dt of '76xx'
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* 7700-7799: same PCB with base dt of '77xx'
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* 7800-7899: same PCB with base dt of '78xx'
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* DT name is comprised of:
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* gw<base dt>-<som dt>-[base-pcb-rev][base-bom-rev][som-pcb-rev][som-bom-rev]
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*
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* For board models from 7900-7999 each PCB is unique with its own dt:
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* DT name is comprised:
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* gw<model>-[pcb-rev][bom-rev]
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*
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*/
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#define snprintfcat(dest, sz, fmt, ...) \
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snprintf((dest) + strlen(dest), (sz) - strlen(dest), fmt, ##__VA_ARGS__)
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const char *eeprom_get_dtb_name(int level, char *buf, int sz)
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{
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#ifdef CONFIG_IMX8MM
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const char *pre = "imx8mm-venice-gw";
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#elif CONFIG_IMX8MN
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const char *pre = "imx8mn-venice-gw";
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#elif CONFIG_IMX8MP
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const char *pre = "imx8mp-venice-gw";
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#endif
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int model, rev_pcb, rev_bom;
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model = ((som_info.model[2] - '0') * 1000)
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+ ((som_info.model[3] - '0') * 100)
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+ ((som_info.model[4] - '0') * 10)
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+ (som_info.model[5] - '0');
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rev_pcb = tolower(get_pcb_rev(som_info.model));
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rev_bom = get_bom_rev(som_info.model);
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/* som + baseboard*/
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if (base_info.model[0]) {
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/* baseboard id: 7100-7199->71; 7200-7299->72; etc */
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int base = ((base_info.model[2] - '0') * 10) + (base_info.model[3] - '0');
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/* som id: 7000-7019->1; 7020-7039->2; etc */
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int som = ((model % 100) / 20) * 2;
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int rev_base_pcb = tolower(get_pcb_rev(base_info.model));
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int rev_base_bom = get_bom_rev(base_info.model);
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snprintf(buf, sz, "%s%2dxx-%dx", pre, base, som);
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switch (level) {
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case 0: /* full model (ie gw73xx-0x-a1a1) */
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if (rev_base_bom)
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snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
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else
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snprintfcat(buf, sz, "-%c", rev_base_pcb);
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if (rev_bom)
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snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
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else
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snprintfcat(buf, sz, "%c", rev_pcb);
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break;
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case 1: /* don't care about SoM revision */
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if (rev_base_bom)
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snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
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else
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snprintfcat(buf, sz, "-%c", rev_base_pcb);
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snprintfcat(buf, sz, "xx");
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break;
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case 2: /* don't care about baseboard revision */
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snprintfcat(buf, sz, "-xx");
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if (rev_bom)
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snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
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else
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snprintfcat(buf, sz, "%c", rev_pcb);
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break;
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case 3: /* don't care about SoM/baseboard revision */
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break;
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default:
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return NULL;
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}
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} else {
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snprintf(buf, sz, "%s%04d", pre, model);
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switch (level) {
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case 0: /* full model wth PCB and BOM revision first (ie gw7901-a1) */
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if (rev_bom)
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snprintfcat(buf, sz, "-%c%d", rev_pcb, rev_bom);
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else
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snprintfcat(buf, sz, "-%c", rev_pcb);
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break;
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case 1: /* don't care about BOM revision */
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snprintfcat(buf, sz, "-%c", rev_pcb);
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break;
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case 2: /* don't care about PCB or BOM revision */
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break;
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case 3: /* don't care about last digit of model */
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buf[strlen(buf) - 1] = 'x';
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break;
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case 4: /* don't care about last two digits of model */
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buf[strlen(buf) - 1] = 'x';
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buf[strlen(buf) - 2] = 'x';
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break;
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default:
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return NULL;
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break;
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}
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}
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return buf;
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}
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static int eeprom_info(bool verbose)
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{
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printf("Model : %s\n", venice_model);
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printf("Serial : %d\n", som_info.serial);
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printf("MFGDate : %02x-%02x-%02x%02x\n",
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som_info.mfgdate[0], som_info.mfgdate[1],
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som_info.mfgdate[2], som_info.mfgdate[3]);
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if (base_info.model[0] && verbose) {
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printf("SOM : %s %d %02x-%02x-%02x%02x\n",
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som_info.model, som_info.serial,
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som_info.mfgdate[0], som_info.mfgdate[1],
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som_info.mfgdate[2], som_info.mfgdate[3]);
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printf("BASE : %s %d %02x-%02x-%02x%02x\n",
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base_info.model, base_info.serial,
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base_info.mfgdate[0], base_info.mfgdate[1],
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base_info.mfgdate[2], base_info.mfgdate[3]);
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}
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return 0;
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}
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int eeprom_init(int quiet)
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{
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char rev_pcb;
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int rev_bom;
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int ret;
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ret = eeprom_read(SOM_EEPROM_BUSNO, SOM_EEPROM_ADDR, 1, &som_info);
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if (ret) {
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puts("ERROR: Failed to probe EEPROM\n");
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memset(&som_info, 0, sizeof(som_info));
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return 0;
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}
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/* read optional baseboard EEPROM */
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eeprom_read(BASEBOARD_EEPROM_BUSNO, BASEBOARD_EEPROM_ADDR, 2, &base_info);
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/* create model strings */
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if (base_info.model[0]) {
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sprintf(venice_model, "GW%c%c%c%c-%c%c-",
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som_info.model[2], /* family */
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base_info.model[3], /* baseboard */
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base_info.model[4], base_info.model[5], /* subload of baseboard */
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som_info.model[4], som_info.model[5]); /* last 2digits of SOM */
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/* baseboard revision */
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rev_pcb = get_pcb_rev(base_info.model);
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rev_bom = get_bom_rev(base_info.model);
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if (rev_bom)
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sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
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else
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sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
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/* som revision */
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rev_pcb = get_pcb_rev(som_info.model);
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rev_bom = get_bom_rev(som_info.model);
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if (rev_bom)
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sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
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else
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sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
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} else {
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strcpy(venice_model, som_info.model);
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}
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venice_serial = som_info.serial;
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if (!quiet)
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eeprom_info(false);
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return (16 << som_info.sdram_size);
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}
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void board_gsc_info(void)
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{
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eeprom_info(true);
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}
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const char *eeprom_get_model(void)
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{
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return venice_model;
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}
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u32 eeprom_get_serial(void)
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{
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return venice_serial;
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}
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