// SPDX-License-Identifier: GPL-2.0+ /* * Board specific initialization for AM654 EVM * * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/ * Lokesh Vutla * */ #include #include #include #include #include #include #include #include #include #include #include #include "../common/board_detect.h" #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM") /* Daughter card presence detection signals */ enum { AM65X_EVM_APP_BRD_DET, AM65X_EVM_LCD_BRD_DET, AM65X_EVM_SERDES_BRD_DET, AM65X_EVM_HDMI_GPMC_BRD_DET, AM65X_EVM_BRD_DET_COUNT, }; /* Max number of MAC addresses that are parsed/processed per daughter card */ #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8 DECLARE_GLOBAL_DATA_PTR; int board_init(void) { return 0; } int dram_init(void) { #ifdef CONFIG_PHYS_64BIT gd->ram_size = 0x100000000; #else gd->ram_size = 0x80000000; #endif return 0; } ulong board_get_usable_ram_top(ulong total_size) { #ifdef CONFIG_PHYS_64BIT /* Limit RAM used by U-Boot to the DDR low region */ if (gd->ram_top > 0x100000000) return 0x100000000; #endif return gd->ram_top; } int dram_init_banksize(void) { /* Bank 0 declares the memory available in the DDR low region */ gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; gd->bd->bi_dram[0].size = 0x80000000; gd->ram_size = 0x80000000; #ifdef CONFIG_PHYS_64BIT /* Bank 1 declares the memory available in the DDR high region */ gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1; gd->bd->bi_dram[1].size = 0x80000000; gd->ram_size = 0x100000000; #endif return 0; } #ifdef CONFIG_SPL_LOAD_FIT int board_fit_config_name_match(const char *name) { #ifdef CONFIG_TARGET_AM654_A53_EVM if (!strcmp(name, "k3-am654-base-board")) return 0; #endif return -1; } #endif #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) int ft_board_setup(void *blob, bd_t *bd) { int ret; ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000"); if (ret) { printf("%s: fixing up msmc ram failed %d\n", __func__, ret); return ret; } #if defined(CONFIG_TI_SECURE_DEVICE) /* Make HW RNG reserved for secure world use */ ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000"); if (ret) printf("%s: disabling TRGN failed %d\n", __func__, ret); #endif return 0; } #endif int do_board_detect(void) { int ret; ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS, CONFIG_EEPROM_CHIP_ADDRESS); if (ret) pr_err("Reading on-board EEPROM at 0x%02x failed %d\n", CONFIG_EEPROM_CHIP_ADDRESS, ret); return ret; } int checkboard(void) { struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA; if (do_board_detect()) /* EEPROM not populated */ printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3"); else printf("Board: %s rev %s\n", ep->name, ep->version); return 0; } static void setup_board_eeprom_env(void) { char *name = "am65x"; if (do_board_detect()) goto invalid_eeprom; if (board_is_am65x_base_board()) name = "am65x"; else printf("Unidentified board claims %s in eeprom header\n", board_ti_get_name()); invalid_eeprom: set_board_info_env_am6(name); } static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc) { int ret; memset(desc, 0, sizeof(*desc)); ret = dm_gpio_lookup_name(gpio_name, desc); if (ret < 0) return ret; /* Request GPIO, simply re-using the name as label */ ret = dm_gpio_request(desc, gpio_name); if (ret < 0) return ret; return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN); } static int probe_daughtercards(void) { struct ti_am6_eeprom ep; struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT]; char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN]; u8 mac_addr_cnt; char name_overlays[1024] = { 0 }; int i, j; int ret; /* * Daughter card presence detection signal name to GPIO (via I2C I/O * expander @ address 0x38) name and EEPROM I2C address mapping. */ const struct { char *gpio_name; u8 i2c_addr; } slot_map[AM65X_EVM_BRD_DET_COUNT] = { { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */ { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */ { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */ { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */ }; /* Declaration of daughtercards to probe */ const struct { u8 slot_index; /* Slot the card is installed */ char *card_name; /* EEPROM-programmed card name */ char *dtbo_name; /* Device tree overlay to apply */ u8 eth_offset; /* ethXaddr MAC address index offset */ } cards[] = { { AM65X_EVM_APP_BRD_DET, "AM6-GPAPPEVM", "k3-am654-gp.dtbo", 0, }, { AM65X_EVM_APP_BRD_DET, "AM6-IDKAPPEVM", "k3-am654-idk.dtbo", 3, }, { AM65X_EVM_SERDES_BRD_DET, "SER-PCIE2LEVM", "k3-am654-pcie-usb2.dtbo", 0, }, { AM65X_EVM_SERDES_BRD_DET, "SER-PCIEUSBEVM", "k3-am654-pcie-usb3.dtbo", 0, }, { AM65X_EVM_LCD_BRD_DET, "OLDI-LCD1EVM", "k3-am654-evm-oldi-lcd1evm.dtbo", 0, }, }; /* * Initialize GPIO used for daughtercard slot presence detection and * keep the resulting handles in local array for easier access. */ for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) { ret = init_daughtercard_det_gpio(slot_map[i].gpio_name, &board_det_gpios[i]); if (ret < 0) return ret; } for (i = 0; i < ARRAY_SIZE(cards); i++) { /* Obtain card-specific slot index and associated I2C address */ u8 slot_index = cards[i].slot_index; u8 i2c_addr = slot_map[slot_index].i2c_addr; /* * The presence detection signal is active-low, hence skip * over this card slot if anything other than 0 is returned. */ ret = dm_gpio_get_value(&board_det_gpios[slot_index]); if (ret < 0) return ret; else if (ret) continue; /* Get and parse the daughter card EEPROM record */ ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr, &ep, (char **)mac_addr, DAUGHTER_CARD_NO_OF_MAC_ADDR, &mac_addr_cnt); if (ret) { pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n", i2c_addr, ret); /* * Even this is pretty serious let's just skip over * this particular daughtercard, rather than ending * the probing process altogether. */ continue; } /* Only process the parsed data if we found a match */ if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name))) continue; printf("Detected: %s rev %s\n", ep.name, ep.version); /* * Populate any MAC addresses from daughtercard into the U-Boot * environment, starting with a card-specific offset so we can * have multiple cards contribute to the MAC pool in a well- * defined manner. */ for (j = 0; j < mac_addr_cnt; j++) { if (!is_valid_ethaddr((u8 *)mac_addr[j])) continue; eth_env_set_enetaddr_by_index("eth", cards[i].eth_offset + j, (uchar *)mac_addr[j]); } /* Skip if no overlays are to be added */ if (!strlen(cards[i].dtbo_name)) continue; /* * Make sure we are not running out of buffer space by checking * if we can fit the new overlay, a trailing space to be used * as a separator, plus the terminating zero. */ if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 > sizeof(name_overlays)) return -ENOMEM; /* Append to our list of overlays */ strcat(name_overlays, cards[i].dtbo_name); strcat(name_overlays, " "); } /* Apply device tree overlay(s) to the U-Boot environment, if any */ if (strlen(name_overlays)) return env_set("name_overlays", name_overlays); return 0; } int board_late_init(void) { struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA; setup_board_eeprom_env(); /* * The first MAC address for ethernet a.k.a. ethernet0 comes from * efuse populated via the am654 gigabit eth switch subsystem driver. * All the other ones are populated via EEPROM, hence continue with * an index of 1. */ board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt); /* Check for and probe any plugged-in daughtercards */ probe_daughtercards(); return 0; }