diff options
Diffstat (limited to 'board/variscite/common/imx9_eeprom.c')
| -rw-r--r-- | board/variscite/common/imx9_eeprom.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/board/variscite/common/imx9_eeprom.c b/board/variscite/common/imx9_eeprom.c new file mode 100644 index 0000000000..32551af5b4 --- /dev/null +++ b/board/variscite/common/imx9_eeprom.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2023 Variscite Ltd. + * + */ +#include <command.h> +#include <dm.h> +#include <i2c.h> +#include <asm/io.h> +#include <cpu_func.h> +#include <u-boot/crc.h> +#include <asm/arch-imx9/ddr.h> + +#include "imx9_eeprom.h" + +static int var_eeprom_get_dev(struct udevice **devp) +{ + int ret; + struct udevice *bus; + + ret = uclass_get_device_by_name(UCLASS_I2C, VAR_SOM_EEPROM_I2C_NAME, &bus); + if (ret) { + printf("%s: No EEPROM I2C bus '%s'\n", __func__, + VAR_SOM_EEPROM_I2C_NAME); + return ret; + } + + ret = dm_i2c_probe(bus, VAR_SOM_EEPROM_I2C_ADDR, 0, devp); + if (ret) { + printf("%s: I2C EEPROM probe failed\n", __func__); + return ret; + } + + i2c_set_chip_offset_len(*devp, 1); + i2c_set_chip_addr_offset_mask(*devp, 1); + + return 0; +} + +int var_eeprom_read_header(struct var_eeprom *e) +{ + int ret; + struct udevice *dev; + + ret = var_eeprom_get_dev(&dev); + if (ret) { + printf("%s: Failed to detect I2C EEPROM\n", __func__); + return ret; + } + + /* Read EEPROM header to memory */ + ret = dm_i2c_read(dev, 0, (void *)e, sizeof(*e)); + if (ret) { + printf("%s: EEPROM read failed, ret=%d\n", __func__, ret); + return ret; + } + + return 0; +} + +int var_eeprom_get_mac(struct var_eeprom *ep, u8 *mac) +{ + flush_dcache_all(); + if (!var_eeprom_is_valid(ep)) + return -1; + + memcpy(mac, ep->mac, sizeof(ep->mac)); + + return 0; +} + +int var_eeprom_get_dram_size(struct var_eeprom *ep, phys_size_t *size) +{ + /* No data in EEPROM - return default DRAM size */ + if (!var_eeprom_is_valid(ep)) { + *size = DEFAULT_SDRAM_SIZE; + return 0; + } + + *size = (ep->dramsize * 128UL) << 20; + return 0; +} + +void var_eeprom_print_prod_info(struct var_eeprom *ep) +{ + if (IS_ENABLED(CONFIG_SPL_BUILD)) + return; + + flush_dcache_all(); + + if (!var_eeprom_is_valid(ep)) + return; + + if (IS_ENABLED(CONFIG_TARGET_IMX93_VAR_SOM)) + printf("\nPart number: VSM-MX93-%.*s\n", + (int)sizeof(ep->partnum), ep->partnum); + + printf("Assembly: AS%.*s\n", (int)sizeof(ep->assembly), (char *)ep->assembly); + + printf("Production date: %.*s %.*s %.*s\n", + 4, /* YYYY */ + (char *)ep->date, + 3, /* MMM */ + ((char *)ep->date) + 4, + 2, /* DD */ + ((char *)ep->date) + 4 + 3); + + printf("Serial Number: %02x:%02x:%02x:%02x:%02x:%02x\n", + ep->mac[0], ep->mac[1], ep->mac[2], ep->mac[3], ep->mac[4], ep->mac[5]); + + debug("EEPROM version: 0x%x\n", ep->version); + debug("SOM features: 0x%x\n", ep->features); + printf("SOM revision: 0x%x\n", ep->somrev); + printf("DRAM PN: VIC-%04d\n", ep->ddr_vic); + debug("DRAM size: %d GiB\n\n", (ep->dramsize * 128) / 1024); +} + +int var_carrier_eeprom_read(const char *bus_name, int addr, struct var_carrier_eeprom *ep) +{ + int ret; + struct udevice *bus; + struct udevice *dev; + + ret = uclass_get_device_by_name(UCLASS_I2C, bus_name, &bus); + if (ret) { + printf("%s: No bus '%s'\n", __func__, bus_name); + return ret; + } + + ret = dm_i2c_probe(bus, addr, 0, &dev); + if (ret) { + printf("%s: Carrier EEPROM I2C probe failed\n", __func__); + return ret; + } + + /* Read EEPROM to memory */ + ret = dm_i2c_read(dev, 0, (void *)ep, sizeof(*ep)); + if (ret) { + printf("%s: Carrier EEPROM read failed, ret=%d\n", __func__, ret); + return ret; + } + + return 0; +} + +int var_carrier_eeprom_is_valid(struct var_carrier_eeprom *ep) +{ + u32 crc, crc_offset = offsetof(struct var_carrier_eeprom, crc); + + if (htons(ep->magic) != VAR_CARRIER_EEPROM_MAGIC) { + printf("Invalid carrier EEPROM magic 0x%x, expected 0x%x\n", + htons(ep->magic), VAR_CARRIER_EEPROM_MAGIC); + return 0; + } + + if (ep->struct_ver < 1) { + printf("Invalid carrier EEPROM version 0x%x\n", ep->struct_ver); + return 0; + } + + if (ep->struct_ver == 1) + return 1; + + /* Only EEPROM structure above version 1 has CRC field */ + crc = crc32(0, (void *)ep, crc_offset); + + if (crc != ep->crc) { + printf("Carrier EEPROM CRC mismatch (%08x != %08x)\n", + crc, be32_to_cpu(ep->crc)); + return 0; + } + + return 1; +} + +/* + * Returns carrier board revision string via 'rev' argument. For legacy + * carrier board revisions the "legacy" string is returned. For new carrier + * board revisions the actual carrier revision is returned. Symphony-Board + * 1.4 and below are legacy, 1.4a and above are new. DT8MCustomBoard 1.4 and + * below are legacy, 2.0 and above are new. + * + */ +void var_carrier_eeprom_get_revision(struct var_carrier_eeprom *ep, char *rev, size_t size) +{ + if (var_carrier_eeprom_is_valid(ep)) + strlcpy(rev, (const char *)ep->carrier_rev, size); + else + strlcpy(rev, "legacy", size); +} |