LXR uboot/board/gateworks/gw

   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>
   9#include <errno.h>
  10#include <i2c.h>
  11#include <malloc.h>
  12#include <asm/bitops.h>
  13
  14#include "gsc.h"
  15#include "ventana_eeprom.h"
  16
  17/* read ventana EEPROM, check for validity, and return baseboard type */
  18int
  19read_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");
  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");
  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");
  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
  67        switch (baseboard) {
  68        case '0': /* original GW5400-A prototype */
  69                type = GW54proto;
  70                break;
  71        case '1':
  72                type = GW51xx;
  73                break;
  74        case '2':
  75                type = GW52xx;
  76                break;
  77        case '3':
  78                type = GW53xx;
  79                break;
  80        case '4':
  81                type = GW54xx;
  82                break;
  83        case '5':
  84                if (info->model[4] == '1') {
  85                        type = GW551x;
  86                        break;
  87                } else if (info->model[4] == '2') {
  88                        type = GW552x;
  89                        break;
  90                }
  91                /* fall through */
  92        default:
  93                printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
  94                type = GW_UNKNOWN;
  95                break;
  96        }
  97        return type;
  98}
  99
 100/* list of config bits that the bootloader will remove from dtb if not set */
 101struct ventana_eeprom_config econfig[] = {
 102        { "eth0", "ethernet0", EECONFIG_ETH0 },
 103        { "eth1", "ethernet1", EECONFIG_ETH1 },
 104        { "sata", "ahci0", EECONFIG_SATA },
 105        { "pcie", NULL, EECONFIG_PCIE},
 106        { "lvds0", NULL, EECONFIG_LVDS0 },
 107        { "lvds1", NULL, EECONFIG_LVDS1 },
 108        { "usb0", NULL, EECONFIG_USB0 },
 109        { "usb1", NULL, EECONFIG_USB1 },
 110        { "mmc0", NULL, EECONFIG_SD0 },
 111        { "mmc1", NULL, EECONFIG_SD1 },
 112        { "mmc2", NULL, EECONFIG_SD2 },
 113        { "mmc3", NULL, EECONFIG_SD3 },
 114        { "uart0", NULL, EECONFIG_UART0 },
 115        { "uart1", NULL, EECONFIG_UART1 },
 116        { "uart2", NULL, EECONFIG_UART2 },
 117        { "uart3", NULL, EECONFIG_UART3 },
 118        { "uart4", NULL, EECONFIG_UART4 },
 119        { "ipu0", NULL, EECONFIG_IPU0 },
 120        { "ipu1", NULL, EECONFIG_IPU1 },
 121        { "can0", NULL, EECONFIG_FLEXCAN },
 122        { "i2c0", NULL, EECONFIG_I2C0 },
 123        { "i2c1", NULL, EECONFIG_I2C1 },
 124        { "i2c2", NULL, EECONFIG_I2C2 },
 125        { "vpu", NULL, EECONFIG_VPU },
 126        { "csi0", NULL, EECONFIG_CSI0 },
 127        { "csi1", NULL, EECONFIG_CSI1 },
 128        { "spi0", NULL, EECONFIG_ESPCI0 },
 129        { "spi1", NULL, EECONFIG_ESPCI1 },
 130        { "spi2", NULL, EECONFIG_ESPCI2 },
 131        { "spi3", NULL, EECONFIG_ESPCI3 },
 132        { "spi4", NULL, EECONFIG_ESPCI4 },
 133        { "spi5", NULL, EECONFIG_ESPCI5 },
 134        { "gps", "pps", EECONFIG_GPS },
 135        { "hdmi_in", NULL, EECONFIG_HDMI_IN },
 136        { "hdmi_out", NULL, EECONFIG_HDMI_OUT },
 137        { "cvbs_in", NULL, EECONFIG_VID_IN },
 138        { "cvbs_out", NULL, EECONFIG_VID_OUT },
 139        { "nand", NULL, EECONFIG_NAND },
 140        { /* Sentinel */ }
 141};
 142
 143#ifdef CONFIG_CMD_EECONFIG
 144static struct ventana_eeprom_config *get_config(const char *name)
 145{
 146        struct ventana_eeprom_config *cfg = econfig;
 147
 148        while (cfg->name) {
 149                if (0 == strcmp(name, cfg->name))
 150                        return cfg;
 151                cfg++;
 152        }
 153        return NULL;
 154}
 155
 156static u8 econfig_bytes[sizeof(ventana_info.config)];
 157static int econfig_init = -1;
 158
 159int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 160{
 161        struct ventana_eeprom_config *cfg;
 162        struct ventana_board_info *info = &ventana_info;
 163        int i;
 164
 165        if (argc < 2)
 166                return CMD_RET_USAGE;
 167
 168        /* initialize */
 169        if (econfig_init != 1) {
 170                memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
 171                econfig_init = 1;
 172        }
 173
 174        /* list configs */
 175        if ((strncmp(argv[1], "list", 4) == 0)) {
 176                cfg = econfig;
 177                while (cfg->name) {
 178                        printf("%s: %d\n", cfg->name,
 179                               test_bit(cfg->bit, econfig_bytes) ?  1 : 0);
 180                        cfg++;
 181                }
 182        }
 183
 184        /* save */
 185        else if ((strncmp(argv[1], "save", 4) == 0)) {
 186                unsigned char *buf = (unsigned char *)info;
 187                int chksum;
 188
 189                /* calculate new checksum */
 190                memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
 191                for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
 192                        chksum += buf[i];
 193                debug("old chksum:0x%04x\n",
 194                      (info->chksum[0] << 8) | info->chksum[1]);
 195                debug("new chksum:0x%04x\n", chksum);
 196                info->chksum[0] = chksum >> 8;
 197                info->chksum[1] = chksum & 0xff;
 198
 199                /* write new config data */
 200                if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info,
 201                                  1, econfig_bytes, sizeof(econfig_bytes))) {
 202                        printf("EEPROM: Failed updating config\n");
 203                        return CMD_RET_FAILURE;
 204                }
 205
 206                /* write new config data */
 207                if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info,
 208                                  1, info->chksum, 2)) {
 209                        printf("EEPROM: Failed updating checksum\n");
 210                        return CMD_RET_FAILURE;
 211                }
 212
 213                printf("Config saved to EEPROM\n");
 214        }
 215
 216        /* get config */
 217        else if (argc == 2) {
 218                cfg = get_config(argv[1]);
 219                if (cfg) {
 220                        printf("%s: %d\n", cfg->name,
 221                               test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
 222                } else {
 223                        printf("invalid config: %s\n", argv[1]);
 224                        return CMD_RET_FAILURE;
 225                }
 226        }
 227
 228        /* set config */
 229        else if (argc == 3) {
 230                cfg = get_config(argv[1]);
 231                if (cfg) {
 232                        if (simple_strtol(argv[2], NULL, 10)) {
 233                                test_and_set_bit(cfg->bit, econfig_bytes);
 234                                printf("Enabled %s\n", cfg->name);
 235                        } else {
 236                                test_and_clear_bit(cfg->bit, econfig_bytes);
 237                                printf("Disabled %s\n", cfg->name);
 238                        }
 239                } else {
 240                        printf("invalid config: %s\n", argv[1]);
 241                        return CMD_RET_FAILURE;
 242                }
 243        }
 244
 245        else
 246                return CMD_RET_USAGE;
 247
 248        return CMD_RET_SUCCESS;
 249}
 250
 251U_BOOT_CMD(
 252        econfig, 3, 0, do_econfig,
 253        "EEPROM configuration",
 254        "list - list config\n"
 255        "save - save config to EEPROM\n"
 256        "<name> - get config 'name'\n"
 257        "<name> [0|1] - set config 'name' to value\n"
 258);
 259
 260#endif /* CONFIG_CMD_EECONFIG */
 261