/* * Copyright (C) 2014 Gateworks Corporation * Author: Tim Harvey * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include "gsc.h" #include "ventana_eeprom.h" /* read ventana EEPROM, check for validity, and return baseboard type */ int read_eeprom(int bus, struct ventana_board_info *info) { int i; int chksum; char baseboard; int type; unsigned char *buf = (unsigned char *)info; memset(info, 0, sizeof(*info)); /* * On a board with a missing/depleted backup battery for GSC, the * board may be ready to probe the GSC before its firmware is * running. We will wait here indefinately for the GSC/EEPROM. */ while (1) { if (0 == i2c_set_bus_num(bus) && 0 == i2c_probe(GSC_EEPROM_ADDR)) break; mdelay(1); } /* read eeprom config section */ if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) { puts("EEPROM: Failed to read EEPROM\n"); return GW_UNKNOWN; } /* sanity checks */ if (info->model[0] != 'G' || info->model[1] != 'W') { puts("EEPROM: Invalid Model in EEPROM\n"); return GW_UNKNOWN; } /* validate checksum */ for (chksum = 0, i = 0; i < sizeof(*info)-2; i++) chksum += buf[i]; if ((info->chksum[0] != chksum>>8) || (info->chksum[1] != (chksum&0xff))) { puts("EEPROM: Failed EEPROM checksum\n"); return GW_UNKNOWN; } /* original GW5400-A prototype */ baseboard = info->model[3]; if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0) baseboard = '0'; switch (baseboard) { case '0': /* original GW5400-A prototype */ type = GW54proto; break; case '1': type = GW51xx; break; case '2': type = GW52xx; break; case '3': type = GW53xx; break; case '4': type = GW54xx; break; case '5': type = GW552x; break; default: printf("EEPROM: Unknown model in EEPROM: %s\n", info->model); type = GW_UNKNOWN; break; } return type; } /* list of config bits that the bootloader will remove from dtb if not set */ struct ventana_eeprom_config econfig[] = { { "eth0", "ethernet0", EECONFIG_ETH0 }, { "eth1", "ethernet1", EECONFIG_ETH1 }, { "sata", "ahci0", EECONFIG_SATA }, { "pcie", NULL, EECONFIG_PCIE}, { "lvds0", NULL, EECONFIG_LVDS0 }, { "lvds1", NULL, EECONFIG_LVDS1 }, { "usb0", NULL, EECONFIG_USB0 }, { "usb1", NULL, EECONFIG_USB1 }, { "mmc0", NULL, EECONFIG_SD0 }, { "mmc1", NULL, EECONFIG_SD1 }, { "mmc2", NULL, EECONFIG_SD2 }, { "mmc3", NULL, EECONFIG_SD3 }, { "uart0", NULL, EECONFIG_UART0 }, { "uart1", NULL, EECONFIG_UART1 }, { "uart2", NULL, EECONFIG_UART2 }, { "uart3", NULL, EECONFIG_UART3 }, { "uart4", NULL, EECONFIG_UART4 }, { "ipu0", NULL, EECONFIG_IPU0 }, { "ipu1", NULL, EECONFIG_IPU1 }, { "can0", NULL, EECONFIG_FLEXCAN }, { "i2c0", NULL, EECONFIG_I2C0 }, { "i2c1", NULL, EECONFIG_I2C1 }, { "i2c2", NULL, EECONFIG_I2C2 }, { "vpu", NULL, EECONFIG_VPU }, { "csi0", NULL, EECONFIG_CSI0 }, { "csi1", NULL, EECONFIG_CSI1 }, { "spi0", NULL, EECONFIG_ESPCI0 }, { "spi1", NULL, EECONFIG_ESPCI1 }, { "spi2", NULL, EECONFIG_ESPCI2 }, { "spi3", NULL, EECONFIG_ESPCI3 }, { "spi4", NULL, EECONFIG_ESPCI4 }, { "spi5", NULL, EECONFIG_ESPCI5 }, { "gps", "pps", EECONFIG_GPS }, { "hdmi_in", NULL, EECONFIG_HDMI_IN }, { "hdmi_out", NULL, EECONFIG_HDMI_OUT }, { "cvbs_in", NULL, EECONFIG_VID_IN }, { "cvbs_out", NULL, EECONFIG_VID_OUT }, { "nand", NULL, EECONFIG_NAND }, { /* Sentinel */ } }; #ifdef CONFIG_CMD_EECONFIG static struct ventana_eeprom_config *get_config(const char *name) { struct ventana_eeprom_config *cfg = econfig; while (cfg->name) { if (0 == strcmp(name, cfg->name)) return cfg; cfg++; } return NULL; } static u8 econfig_bytes[sizeof(ventana_info.config)]; static int econfig_init = -1; int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { struct ventana_eeprom_config *cfg; struct ventana_board_info *info = &ventana_info; int i; if (argc < 2) return CMD_RET_USAGE; /* initialize */ if (econfig_init != 1) { memcpy(econfig_bytes, info->config, sizeof(econfig_bytes)); econfig_init = 1; } /* list configs */ if ((strncmp(argv[1], "list", 4) == 0)) { cfg = econfig; while (cfg->name) { printf("%s: %d\n", cfg->name, test_bit(cfg->bit, econfig_bytes) ? 1 : 0); cfg++; } } /* save */ else if ((strncmp(argv[1], "save", 4) == 0)) { unsigned char *buf = (unsigned char *)info; int chksum; /* calculate new checksum */ memcpy(info->config, econfig_bytes, sizeof(econfig_bytes)); for (chksum = 0, i = 0; i < sizeof(*info)-2; i++) chksum += buf[i]; debug("old chksum:0x%04x\n", (info->chksum[0] << 8) | info->chksum[1]); debug("new chksum:0x%04x\n", chksum); info->chksum[0] = chksum >> 8; info->chksum[1] = chksum & 0xff; /* write new config data */ if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info, 1, econfig_bytes, sizeof(econfig_bytes))) { printf("EEPROM: Failed updating config\n"); return CMD_RET_FAILURE; } /* write new config data */ if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info, 1, info->chksum, 2)) { printf("EEPROM: Failed updating checksum\n"); return CMD_RET_FAILURE; } printf("Config saved to EEPROM\n"); } /* get config */ else if (argc == 2) { cfg = get_config(argv[1]); if (cfg) { printf("%s: %d\n", cfg->name, test_bit(cfg->bit, econfig_bytes) ? 1 : 0); } else { printf("invalid config: %s\n", argv[1]); return CMD_RET_FAILURE; } } /* set config */ else if (argc == 3) { cfg = get_config(argv[1]); if (cfg) { if (simple_strtol(argv[2], NULL, 10)) { test_and_set_bit(cfg->bit, econfig_bytes); printf("Enabled %s\n", cfg->name); } else { test_and_clear_bit(cfg->bit, econfig_bytes); printf("Disabled %s\n", cfg->name); } } else { printf("invalid config: %s\n", argv[1]); return CMD_RET_FAILURE; } } else return CMD_RET_USAGE; return CMD_RET_SUCCESS; } U_BOOT_CMD( econfig, 3, 0, do_econfig, "EEPROM configuration", "list - list config\n" "save - save config to EEPROM\n" " - get config 'name'\n" " [0|1] - set config 'name' to value\n" ); #endif /* CONFIG_CMD_EECONFIG */