diff options
Diffstat (limited to 'board/kobol/helios64-rk3399/sys_otp.c')
| -rw-r--r-- | board/kobol/helios64-rk3399/sys_otp.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/board/kobol/helios64-rk3399/sys_otp.c b/board/kobol/helios64-rk3399/sys_otp.c new file mode 100644 index 0000000000..8c20693c0e --- /dev/null +++ b/board/kobol/helios64-rk3399/sys_otp.c @@ -0,0 +1,250 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#include <linux/types.h> +#include <dm.h> +#include <spi.h> +#include <log.h> +#include <net.h> +#include <u-boot/crc.h> + +#include "sys_otp.h" + +#define OTP_DEVICE_BUS 0 +#define OTP_DEVICE_CS 0 +#define MAX_NUM_PORTS 2 + +enum board_variant { + BOARD_VARIANT_INVALID = 0, + BOARD_VARIANT_ENG_SAMPLE, + BOARD_VARIANT_4G_PROD_NO_ECC, + BOARD_VARIANT_MAX +}; + +struct __attribute__ ((__packed__)) otp_data_t { + u8 magic[8]; + u8 part_num[16]; + u8 variant; + u8 revision; + u8 serial_num[6]; + u8 mfg_year[2]; + u8 mfg_month; + u8 mfg_day; + u8 mac_addr[MAX_NUM_PORTS][6]; + u8 reserved[204]; + u32 checksum; +} otp; + +static struct spi_slave *slave; +static int has_been_read = 0; +static int data_valid = 0; + +static inline int is_data_valid(void) +{ + return data_valid; +} + +static inline int is_valid_header(void) +{ + if ((otp.magic[0] == 'H') || (otp.magic[1] == '6') || + (otp.magic[2] == '4') || (otp.magic[3] == 'N') || + (otp.magic[4] == 'P') || (otp.magic[5] == 'V') || + (otp.magic[6] == '1') || (otp.magic[7] == 0)) + + return 1; + + return 0; +} + +static int init_system_otp(int bus, int cs) +{ + int ret; + char name[30], *str; + struct udevice *dev; + + snprintf(name, sizeof(name), "generic_%d:%d", bus, cs); + str = strdup(name); + if (!str) + return -ENOMEM; + ret = spi_get_bus_and_cs(bus, cs, 25000000, CONFIG_DEFAULT_SPI_MODE, "spi_generic_drv", + str, &dev, &slave); + return ret; +} + +#ifdef DEBUG +/** + * show_otp_data - display the contents of the OTP register + */ +static void show_otp_data(void) +{ + u32 i; + u32 crc; + + const char* var_str[BOARD_VARIANT_MAX] = { + "Invalid variant", + "Engineering Sample", + "Production - 4GB non ECC" + }; + + printf("\n"); + printf("Register dump: (%lu bytes)\n", sizeof(otp)); + for (i = 0; i < sizeof(otp); i++) { + if ((i % 16) == 0) + printf("%02X: ", i); + printf("%02X ", ((u8 *)&otp)[i]); + if (((i % 16) == 15) || (i == sizeof(otp) - 1)) + printf("\n"); + } + + if (!is_valid_header()) + return; + + printf("Part Number: %s\n", otp.part_num); + printf("Variant: %s\n", var_str[otp.variant]); + printf("Revision: %x.%x\n", (otp.revision & 0xf0) >> 4, otp.revision & 0x0f); + printf("Serial Number: %012llx\n", *((uint64_t*) otp.serial_num) & + 0xFFFFFFFFFFFF); + printf("Manufacturing Date: %02X-%02X-%04X (DD-MM-YYYY)\n", otp.mfg_day, + otp.mfg_month, *(u16*) otp.mfg_year); + + printf("1GbE MAC Address: %02X:%02X:%02X:%02X:%02X:%02X\n", + otp.mac_addr[0][0], otp.mac_addr[0][1], otp.mac_addr[0][2], + otp.mac_addr[0][3], otp.mac_addr[0][4], otp.mac_addr[0][5]); + + printf("2.5GbE MAC Address: %02X:%02X:%02X:%02X:%02X:%02X\n", + otp.mac_addr[1][0], otp.mac_addr[1][1], otp.mac_addr[1][2], + otp.mac_addr[1][3], otp.mac_addr[1][4], otp.mac_addr[1][5]); + + crc = crc32(0, (void *)&otp, sizeof(otp) - 4); + + if (crc == le32_to_cpu(otp.checksum)) + printf("CRC: %08x\n\n", le32_to_cpu(otp.checksum)); + else + printf("CRC: %08x (should be %08x)\n\n", + le32_to_cpu(otp.checksum), crc); + +} +#endif + +int read_otp_data(void) +{ + int ret; + u8 dout[5]; + + if (has_been_read) { + if (is_data_valid()) + return 0; + else + goto data_invalid; + } + + ret = init_system_otp(OTP_DEVICE_BUS, OTP_DEVICE_CS); + if (ret) + return ret; + + ret = spi_claim_bus(slave); + if (ret) { + debug("SPI: Failed to claim SPI bus: %d\n", ret); + return ret; + } + + dout[0] = 0x48; + dout[1] = 0x00; + dout[2] = 0x10; /* Security Register #1 */ + dout[3] = 0x00; + dout[4] = 0x00; /* Dummy Byte */ + + ret = spi_write_then_read(slave, dout, sizeof(dout), NULL, (u8 *)&otp, + sizeof(otp)); + + spi_release_bus(slave); +#ifdef DEBUG + show_otp_data(); +#endif + + has_been_read = (ret == 0) ? 1 : 0; + if (!is_valid_header()) + goto data_invalid; + + if (crc32(0, (void *)&otp, sizeof(otp) - 4) == + le32_to_cpu(otp.checksum)) + data_valid = 1; + + if (!is_data_valid()) + goto data_invalid; + + return 0; + +data_invalid: + printf("Invalid board ID data!\n"); + return -1; +} + +int get_revision(int *major, int *minor) +{ + if (!is_data_valid()) + return -1; + + *major = (otp.revision & 0xf0) >> 4; + *minor = otp.revision & 0x0f; + + return 0; +} + +const char *get_variant(void) +{ + const char* var_str[BOARD_VARIANT_MAX] = { + "Unknown", + "Engineering Sample", + "4GB non ECC" + }; + + if ((otp.variant < BOARD_VARIANT_ENG_SAMPLE) || + (otp.variant >= BOARD_VARIANT_MAX)) + return var_str[0]; + + return var_str[otp.variant]; +} + +void set_board_info(void) +{ + char env_str[13]; + + if (!is_data_valid()) + return; + + snprintf(env_str, sizeof(env_str), "%i.%i", (otp.revision & 0xf0) >> 4, otp.revision & 0x0f); + env_set("board_rev", env_str); + + sprintf(env_str, "%012llx", *((uint64_t*) otp.serial_num) & + 0xFFFFFFFFFFFF); + + env_set("serial#", env_str); +} + +int mac_read_from_otp(void) +{ + unsigned int i; + int ret; + + if (!is_data_valid()) + return -1; + + for (i = 0; i < MAX_NUM_PORTS; i++) { + char enetvar[9]; + + sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i); + + if (!is_valid_ethaddr(otp.mac_addr[i])) { + debug("Not valid %s!\n", enetvar); + continue; + } + + /* Only initialize environment variables that are blank + * (i.e. have not yet been set) + */ + if (!env_get(enetvar)) + eth_env_set_enetaddr(enetvar, otp.mac_addr[i]); + } + + return ret; +} |