Based on U-Boot patch from the Open Compute project:
https://github.com/opencomputeproject/onie/blob/ec87e872d46b9805565d2c6124b2...
Keep only I2C EEPROM support. Use the generic eeprom driver.
Add support for multiple EEPROM TLV stores on the same system. This is useful in case of SOM and carrier that both provide ID and hardware configuration information.
Add option to enable for SPL. This allows selection of RAM configuration based on EEPROM stored board identification.
Signed-off-by: Baruch Siach baruch@tkos.co.il --- cmd/Kconfig | 12 + cmd/Makefile | 2 + cmd/sys_eeprom.c | 1078 ++++++++++++++++++++++++++++++++++++++++++ include/sys_eeprom.h | 169 +++++++ 4 files changed, 1261 insertions(+) create mode 100644 cmd/sys_eeprom.c create mode 100644 include/sys_eeprom.h
diff --git a/cmd/Kconfig b/cmd/Kconfig index 99b8a0e21822..483663404da4 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -234,6 +234,18 @@ config CMD_REGINFO help Register dump
+config CMD_SYS_EEPROM + bool "sys_eeprom" + depends on I2C_EEPROM + help + Display and program the system EEPROM data block. + +config SPL_CMD_SYS_EEPROM + bool "sys_eeprom for SPL" + depends on SPL_I2C_EEPROM + help + Read system EEPROM data block. + endmenu
menu "Boot commands" diff --git a/cmd/Makefile b/cmd/Makefile index 2d723ea0f07d..cbb1d46b8f50 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -180,6 +180,8 @@ obj-$(CONFIG_X86) += x86/ obj-$(CONFIG_ARCH_MVEBU) += mvebu/ endif # !CONFIG_SPL_BUILD
+obj-$(CONFIG_$(SPL_)CMD_SYS_EEPROM) += sys_eeprom.o + # core command obj-y += nvedit.o
diff --git a/cmd/sys_eeprom.c b/cmd/sys_eeprom.c new file mode 100644 index 000000000000..373673a5266c --- /dev/null +++ b/cmd/sys_eeprom.c @@ -0,0 +1,1078 @@ +/* + * See file CREDITS for list of people who contributed to this + * project. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <dm.h> +#include <i2c.h> +#include <i2c_eeprom.h> +#include <env.h> +#include <linux/ctype.h> + +#include "sys_eeprom.h" + +#define MAX_TLV_DEVICES 2 + +/* File scope function prototypes */ +static bool is_checksum_valid(u8 *eeprom); +static int read_eeprom(u8 *eeprom); +static void show_eeprom(u8 *eeprom); +static void decode_tlv(tlvinfo_tlv_t * tlv); +static void update_crc(u8 *eeprom); +static int prog_eeprom(u8 * eeprom); +static bool tlvinfo_find_tlv(u8 * eeprom, u8 tcode, int * eeprom_index); +static bool tlvinfo_delete_tlv(u8 * eeprom, u8 code); +static bool tlvinfo_add_tlv(u8 * eeprom, int tcode, char * strval); +static int set_mac(char *buf, const char *string); +static int set_date(char *buf, const char *string); +static int set_bytes(char *buf, const char *string, int * converted_accum); +static void show_tlv_devices(void); + +/* Set to 1 if we've read EEPROM into memory */ +static int has_been_read = 0; +/* The EERPOM contents after being read into memory */ +static u8 eeprom[TLV_INFO_MAX_LEN]; + +static struct udevice *tlv_devices[MAX_TLV_DEVICES]; +static unsigned current_dev; + +/** + * is_valid_tlv + * + * Perform basic sanity checks on a TLV field. The TLV is pointed to + * by the parameter provided. + * 1. The type code is not reserved (0x00 or 0xFF) + */ +static inline bool is_valid_tlv(tlvinfo_tlv_t *tlv) +{ + return( (tlv->type != 0x00) && + (tlv->type != 0xFF) ); +} + +/** + * is_hex + * + * Tests if character is an ASCII hex digit + */ +static inline u8 is_hex(char p) +{ + return (((p >= '0') && (p <= '9')) || + ((p >= 'A') && (p <= 'F')) || + ((p >= 'a') && (p <= 'f'))); +} + +/** + * is_checksum_valid + * + * Validate the checksum in the provided TlvInfo EEPROM data. First, + * verify that the TlvInfo header is valid, then make sure the last + * TLV is a CRC-32 TLV. Then calculate the CRC over the EEPROM data + * and compare it to the value stored in the EEPROM CRC-32 TLV. + */ +static bool is_checksum_valid(u8 *eeprom) +{ + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_crc; + unsigned int calc_crc; + unsigned int stored_crc; + + // Is the eeprom header valid? + if (!is_valid_tlvinfo_header(eeprom_hdr)) { + return(FALSE); + } + + // Is the last TLV a CRC? + eeprom_crc = (tlvinfo_tlv_t *) &eeprom[sizeof(tlvinfo_header_t) + + be16_to_cpu(eeprom_hdr->totallen) - (sizeof(tlvinfo_tlv_t) + 4)]; + if ((eeprom_crc->type != TLV_CODE_CRC_32) || (eeprom_crc->length != 4)) { + return(FALSE); + } + + // Calculate the checksum + calc_crc = crc32(0, (void *)eeprom, + sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen) - 4); + stored_crc = (eeprom_crc->value[0] << 24) | + (eeprom_crc->value[1] << 16) | + (eeprom_crc->value[2] << 8) | + eeprom_crc->value[3]; + return( calc_crc == stored_crc); +} + +/** + * read_eeprom + * + * Read the EEPROM into memory, if it hasn't already been read. + */ +static int read_eeprom(u8 *eeprom) +{ + int ret; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[sizeof(tlvinfo_header_t)]; + + if (has_been_read) + return 0; + + /* Read the header */ + ret = read_sys_eeprom((void *)eeprom_hdr, 0, sizeof(tlvinfo_header_t)); + /* If the header was successfully read, read the TLVs */ + if ((ret == 0) && is_valid_tlvinfo_header(eeprom_hdr)) { + ret = read_sys_eeprom((void *)eeprom_tlv, sizeof(tlvinfo_header_t), + be16_to_cpu(eeprom_hdr->totallen)); + } + + // If the contents are invalid, start over with default contents + if ( !is_valid_tlvinfo_header(eeprom_hdr) || !is_checksum_valid(eeprom) ){ + strcpy(eeprom_hdr->signature, TLV_INFO_ID_STRING); + eeprom_hdr->version = TLV_INFO_VERSION; + eeprom_hdr->totallen = cpu_to_be16(0); + update_crc(eeprom); + } + + has_been_read = 1; + +#ifdef DEBUG + show_eeprom(eeprom); +#endif + + return ret; +} + +/** + * show_eeprom + * + * Display the contents of the EEPROM + */ +static void show_eeprom(u8 *eeprom) +{ + int tlv_end; + int curr_tlv; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_tlv; + + if ( !is_valid_tlvinfo_header(eeprom_hdr) ) { + printf("EEPROM does not contain data in a valid TlvInfo format.\n"); + return; + } + + printf("TLV: %u\n", current_dev); + printf("TlvInfo Header:\n"); + printf(" Id String: %s\n", eeprom_hdr->signature); + printf(" Version: %d\n", eeprom_hdr->version); + printf(" Total Length: %d\n", be16_to_cpu(eeprom_hdr->totallen)); + + printf("TLV Name Code Len Value\n"); + printf("-------------------- ---- --- -----\n"); + curr_tlv = sizeof(tlvinfo_header_t); + tlv_end = sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen); + while (curr_tlv < tlv_end) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[curr_tlv]; + if (!is_valid_tlv(eeprom_tlv)) { + printf("Invalid TLV field starting at EEPROM offset %d\n", curr_tlv); + return; + } + decode_tlv(eeprom_tlv); + curr_tlv += sizeof(tlvinfo_tlv_t) + eeprom_tlv->length; + } + + printf("Checksum is %s.\n", is_checksum_valid(eeprom) ? "valid" : "invalid"); + +#ifdef DEBUG + printf("EEPROM dump: (0x%x bytes)", TLV_INFO_MAX_LEN); + for (i = 0; i < TLV_INFO_MAX_LEN; i++) { + if ((i % 16) == 0) + printf("\n%02X: ", i); + printf("%02X ", eeprom[i]); + } + printf("\n"); +#endif + + return; +} + +/** + * Struct for displaying the TLV codes and names. + */ +struct tlv_code_desc { + u8 m_code; + char* m_name; +}; + +/** + * List of TLV codes and names. + */ +static struct tlv_code_desc tlv_code_list[] = { + { TLV_CODE_PRODUCT_NAME , "Product Name"}, + { TLV_CODE_PART_NUMBER , "Part Number"}, + { TLV_CODE_SERIAL_NUMBER , "Serial Number"}, + { TLV_CODE_MAC_BASE , "Base MAC Address"}, + { TLV_CODE_MANUF_DATE , "Manufacture Date"}, + { TLV_CODE_DEVICE_VERSION, "Device Version"}, + { TLV_CODE_LABEL_REVISION, "Label Revision"}, + { TLV_CODE_PLATFORM_NAME , "Platform Name"}, + { TLV_CODE_ONIE_VERSION , "ONIE Version"}, + { TLV_CODE_MAC_SIZE , "MAC Addresses"}, + { TLV_CODE_MANUF_NAME , "Manufacturer"}, + { TLV_CODE_MANUF_COUNTRY , "Country Code"}, + { TLV_CODE_VENDOR_NAME , "Vendor Name"}, + { TLV_CODE_DIAG_VERSION , "Diag Version"}, + { TLV_CODE_SERVICE_TAG , "Service Tag"}, + { TLV_CODE_VENDOR_EXT , "Vendor Extension"}, + { TLV_CODE_CRC_32 , "CRC-32"}, +}; + +/** + * Look up a TLV name by its type. + */ +static inline const char* tlv_type2name(u8 type) +{ + char* name = "Unknown"; + int i; + + for (i = 0; i < sizeof(tlv_code_list)/sizeof(tlv_code_list[0]); i++) { + if (tlv_code_list[i].m_code == type) { + name = tlv_code_list[i].m_name; + break; + } + } + + return name; +} + +/* + * decode_tlv + * + * Print a string representing the contents of the TLV field. The format of + * the string is: + * 1. The name of the field left justified in 20 characters + * 2. The type code in hex right justified in 5 characters + * 3. The length in decimal right justified in 4 characters + * 4. The value, left justified in however many characters it takes + * The validity of EEPROM contents and the TLV field have been verified + * prior to calling this function. + */ +#define DECODE_NAME_MAX 20 + +/* + * The max decode value is currently for the 'raw' type or the 'vendor + * extension' type, both of which have the same decode format. The + * max decode string size is computed as follows: + * + * strlen(" 0xFF") * TLV_VALUE_MAX_LEN + 1 + * + */ +#define DECODE_VALUE_MAX ((5 * TLV_VALUE_MAX_LEN) + 1) + +static void decode_tlv(tlvinfo_tlv_t * tlv) +{ + char name[DECODE_NAME_MAX]; + char value[DECODE_VALUE_MAX]; + int i; + + strncpy(name, tlv_type2name(tlv->type), DECODE_NAME_MAX); + + switch (tlv->type) { + case TLV_CODE_PRODUCT_NAME: + case TLV_CODE_PART_NUMBER: + case TLV_CODE_SERIAL_NUMBER: + case TLV_CODE_MANUF_DATE: + case TLV_CODE_LABEL_REVISION: + case TLV_CODE_PLATFORM_NAME: + case TLV_CODE_ONIE_VERSION: + case TLV_CODE_MANUF_NAME: + case TLV_CODE_MANUF_COUNTRY: + case TLV_CODE_VENDOR_NAME: + case TLV_CODE_DIAG_VERSION: + case TLV_CODE_SERVICE_TAG: + memcpy(value, tlv->value, tlv->length); + value[tlv->length] = 0; + break; + case TLV_CODE_MAC_BASE: + sprintf(value, "%02X:%02X:%02X:%02X:%02X:%02X", + tlv->value[0], tlv->value[1], tlv->value[2], + tlv->value[3], tlv->value[4], tlv->value[5]); + break; + case TLV_CODE_DEVICE_VERSION: + sprintf(value, "%u", tlv->value[0]); + break; + case TLV_CODE_MAC_SIZE: + sprintf(value, "%u", (tlv->value[0] << 8) | tlv->value[1]); + break; + case TLV_CODE_VENDOR_EXT: + value[0] = 0; + for (i = 0; (i < (DECODE_VALUE_MAX/5)) && (i < tlv->length); i++) { + sprintf(value, "%s 0x%02X", value, tlv->value[i]); + } + break; + case TLV_CODE_CRC_32: + sprintf(value, "0x%02X%02X%02X%02X", + tlv->value[0], tlv->value[1], tlv->value[2], tlv->value[3]); + break; + default: + value[0] = 0; + for (i = 0; (i < (DECODE_VALUE_MAX/5)) && (i < tlv->length); i++) { + sprintf(value, "%s 0x%02X", value, tlv->value[i]); + } + break; + } + + name[DECODE_NAME_MAX-1] = 0; + printf("%-20s 0x%02X %3d %s\n", name, tlv->type, tlv->length, value); + return; +} + +/** + * update_crc + * + * This function updates the CRC-32 TLV. If there is no CRC-32 TLV, then + * one is added. This function should be called after each update to the + * EEPROM structure, to make sure the CRC is always correct. + */ +static void update_crc(u8 *eeprom) +{ + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_crc; + unsigned int calc_crc; + int eeprom_index; + + // Discover the CRC TLV + if (!tlvinfo_find_tlv(eeprom, TLV_CODE_CRC_32, &eeprom_index)) { + if ((be16_to_cpu(eeprom_hdr->totallen) + sizeof(tlvinfo_tlv_t) + 4) > TLV_TOTAL_LEN_MAX) { + return; + } + eeprom_index = sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen); + eeprom_hdr->totallen = cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) + + sizeof(tlvinfo_tlv_t) + 4); + } + eeprom_crc = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + eeprom_crc->type = TLV_CODE_CRC_32; + eeprom_crc->length = 4; + + // Calculate the checksum + calc_crc = crc32(0, (void *)eeprom, + sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen) - 4); + eeprom_crc->value[0] = (calc_crc >> 24) & 0xFF; + eeprom_crc->value[1] = (calc_crc >> 16) & 0xFF; + eeprom_crc->value[2] = (calc_crc >> 8) & 0xFF; + eeprom_crc->value[3] = (calc_crc >> 0) & 0xFF; + + return; +} + +/** + * prog_eeprom + * + * Write the EEPROM data from CPU memory to the hardware. + */ +static int prog_eeprom(u8 * eeprom) +{ + int ret = 0; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + int eeprom_len; + + update_crc(eeprom); + + eeprom_len = sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen); + ret = write_sys_eeprom(eeprom, eeprom_len); + if (ret) { + printf("Programming failed.\n"); + return -1; + } + + printf("Programming passed.\n"); + return 0; +} + +/** + * show_tlv_code_list - Display the list of TLV codes and names + */ +void show_tlv_code_list(void) +{ + int i; + + printf("TLV Code TLV Name\n"); + printf("======== =================\n"); + for (i = 0; i < sizeof(tlv_code_list)/sizeof(tlv_code_list[0]); i++) { + printf("0x%02X %s\n", + tlv_code_list[i].m_code, + tlv_code_list[i].m_name); + } +} + +/** + * do_sys_eeprom + * + * This function implements the sys_eeprom command. + */ +int do_sys_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + char cmd; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + + // If no arguments, read the EERPOM and display its contents + if (argc == 1) { + read_eeprom(eeprom); + show_eeprom(eeprom); + return 0; + } + + // We only look at the first character to the command, so "read" and "reset" + // will both be treated as "read". + cmd = argv[1][0]; + + // Read the EEPROM contents + if (cmd == 'r') { + has_been_read = 0; + if (!read_eeprom(eeprom)) + printf("EEPROM data loaded from device to memory.\n"); + return 0; + } + + // Subsequent commands require that the EEPROM has already been read. + if (!has_been_read) { + printf("Please read the EEPROM data first, using the 'sys_eeprom read' command.\n"); + return 0; + } + + // Handle the commands that don't take parameters + if (argc == 2) { + switch (cmd) { + case 'w': /* write */ + prog_eeprom(eeprom); + break; + case 'e': /* erase */ + strcpy(eeprom_hdr->signature, TLV_INFO_ID_STRING); + eeprom_hdr->version = TLV_INFO_VERSION; + eeprom_hdr->totallen = cpu_to_be16(0); + update_crc(eeprom); + printf("EEPROM data in memory reset.\n"); + break; + case 'l': /* list */ + show_tlv_code_list(); + break; + case 'd': /* dev */ + show_tlv_devices(); + break; + default: + cmd_usage(cmdtp); + break; + } + return 0; + } + + // The set command takes one or two args. + if (argc > 4) { + cmd_usage(cmdtp); + return 0; + } + + // Set command. If the TLV exists in the EEPROM, delete it. Then if data was + // supplied for this TLV add the TLV with the new contents at the end. + if (cmd == 's') { + int tcode; + tcode = simple_strtoul(argv[2], NULL, 0); + tlvinfo_delete_tlv(eeprom, tcode); + if (argc == 4) { + tlvinfo_add_tlv(eeprom, tcode, argv[3]); + } + } else if (cmd == 'd') { /* 'dev' command */ + unsigned devnum; + devnum = simple_strtoul(argv[2], NULL, 0); + if (devnum > MAX_TLV_DEVICES || tlv_devices[devnum] == NULL) { + printf("Invalid device number\n"); + return 0; + } + current_dev = devnum; + has_been_read = 0; + } else { + cmd_usage(cmdtp); + } + + return 0; +} + +/** + * This macro defines the sys_eeprom command line command. + */ +U_BOOT_CMD( + sys_eeprom, 4, 1, do_sys_eeprom, + "Display and program the system EEPROM data block.", + "[read|write|set <type_code> <string_value>|erase|list]\n" + "sys_eeprom\n" + " - With no arguments display the current contents.\n" + "sys_eeprom dev [dev]\n" + " - List devices or set current EEPROM device.\n" + "sys_eeprom read\n" + " - Load EEPROM data from device to memory.\n" + "sys_eeprom write\n" + " - Write the EEPROM data to persistent storage.\n" + "sys_eeprom set <type_code> <string_value>\n" + " - Set a field to a value.\n" + " - If no string_value, field is deleted.\n" + " - Use 'sys_eeprom write' to make changes permanent.\n" + "sys_eeprom erase\n" + " - Reset the in memory EEPROM data.\n" + " - Use 'sys_eeprom read' to refresh the in memory EEPROM data.\n" + " - Use 'sys_eeprom write' to make changes permanent.\n" + "sys_eeprom list\n" + " - List the understood TLV codes and names.\n" + ); + +/** + * tlvinfo_find_tlv + * + * This function finds the TLV with the supplied code in the EERPOM. + * An offset from the beginning of the EEPROM is returned in the + * eeprom_index parameter if the TLV is found. + */ +static bool tlvinfo_find_tlv(u8 * eeprom, u8 tcode, int * eeprom_index) +{ + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_tlv; + int eeprom_end; + + // Search through the TLVs, looking for the first one which matches the + // supplied type code. + *eeprom_index = sizeof(tlvinfo_header_t); + eeprom_end = sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen); + while (*eeprom_index < eeprom_end) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[*eeprom_index]; + if (!is_valid_tlv(eeprom_tlv)) { + return(FALSE); + } + if (eeprom_tlv->type == tcode) { + return(TRUE); + } + *eeprom_index += sizeof(tlvinfo_tlv_t) + eeprom_tlv->length; + } + return(FALSE); +} + +/** + * tlvinfo_delete_tlv + * + * This function deletes the TLV with the specified type code from the + * EEPROM. + */ +static bool tlvinfo_delete_tlv(u8 * eeprom, u8 code) +{ + int eeprom_index; + int tlength; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_tlv; + + // Find the TLV and then move all following TLVs "forward" + if (tlvinfo_find_tlv(eeprom, code, &eeprom_index)) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + tlength = sizeof(tlvinfo_tlv_t) + eeprom_tlv->length; + memcpy(&eeprom[eeprom_index], &eeprom[eeprom_index+tlength], + sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen) - eeprom_index - tlength); + eeprom_hdr->totallen = cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) - tlength); + update_crc(eeprom); + return(TRUE); + } + return(FALSE); +} + +/** + * tlvinfo_add_tlv + * + * This function adds a TLV to the EEPROM, converting the value (a string) to + * the format in which it will be stored in the EEPROM. + */ +#define MAX_TLV_VALUE_LEN 256 +static bool tlvinfo_add_tlv(u8 * eeprom, int tcode, char * strval) +{ + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + tlvinfo_tlv_t * eeprom_tlv; + int new_tlv_len = 0; + u32 value; + char data[MAX_TLV_VALUE_LEN]; + int eeprom_index; + + // Encode each TLV type into the format to be stored in the EERPOM + switch (tcode) { + case TLV_CODE_PRODUCT_NAME: + case TLV_CODE_PART_NUMBER: + case TLV_CODE_SERIAL_NUMBER: + case TLV_CODE_LABEL_REVISION: + case TLV_CODE_PLATFORM_NAME: + case TLV_CODE_ONIE_VERSION: + case TLV_CODE_MANUF_NAME: + case TLV_CODE_MANUF_COUNTRY: + case TLV_CODE_VENDOR_NAME: + case TLV_CODE_DIAG_VERSION: + case TLV_CODE_SERVICE_TAG: + strncpy(data, strval, MAX_TLV_VALUE_LEN); + new_tlv_len = min_t(size_t, MAX_TLV_VALUE_LEN, strlen(strval)); + break; + case TLV_CODE_DEVICE_VERSION: + value = simple_strtoul(strval, NULL, 0); + if (value >= 256) { + printf("ERROR: Device version must be 255 or less. Value supplied: %u", value); + return(FALSE); + } + data[0] = value & 0xFF; + new_tlv_len = 1; + break; + case TLV_CODE_MAC_SIZE: + value = simple_strtoul(strval, NULL, 0); + if (value >= 65536) { + printf("ERROR: MAC Size must be 65535 or less. Value supplied: %u", value); + return(FALSE); + } + data[0] = (value >> 8) & 0xFF; + data[1] = value & 0xFF; + new_tlv_len = 2; + break; + case TLV_CODE_MANUF_DATE: + if (set_date(data, strval) != 0) { + return(FALSE); + } + new_tlv_len = 19; + break; + case TLV_CODE_MAC_BASE: + if (set_mac(data, strval) != 0) { + return(FALSE); + } + new_tlv_len = 6; + break; + case TLV_CODE_CRC_32: + printf("WARNING: The CRC TLV is set automatically and cannot be set manually.\n"); + return(FALSE); + case TLV_CODE_VENDOR_EXT: + default: + if (set_bytes(data, strval, &new_tlv_len) != 0 ) { + return(FALSE); + } + break; + } + + // Is there room for this TLV? + if ((be16_to_cpu(eeprom_hdr->totallen) + sizeof(tlvinfo_tlv_t) + new_tlv_len) + > TLV_TOTAL_LEN_MAX) { + printf("ERROR: There is not enough room in the EERPOM to save data.\n"); + return(FALSE); + } + + // Add TLV at the end, overwriting CRC TLV if it exists + if (tlvinfo_find_tlv(eeprom, TLV_CODE_CRC_32, &eeprom_index)) { + eeprom_hdr->totallen = cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) - sizeof(tlvinfo_tlv_t) - 4); + } + else { + eeprom_index = sizeof(tlvinfo_header_t) + be16_to_cpu(eeprom_hdr->totallen); + } + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + eeprom_tlv->type = tcode; + eeprom_tlv->length = new_tlv_len; + memcpy(eeprom_tlv->value, data, new_tlv_len); + + // Update the total length and calculate (add) a new CRC-32 TLV + eeprom_hdr->totallen = cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) + sizeof(tlvinfo_tlv_t) + new_tlv_len); + update_crc(eeprom); + + return(TRUE); +} + +/** + * set_mac + * + * Converts a string MAC address into a binary buffer. + * + * This function takes a pointer to a MAC address string + * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number). + * The string format is verified and then converted to binary and + * stored in a buffer. + */ +static int set_mac(char *buf, const char *string) +{ + char *p = (char *) string; + int i; + int err = 0; + char *end; + + if (!p) { + printf("ERROR: NULL mac addr string passed in.\n"); + return -1; + } + + if (strlen(p) != 17) { + printf("ERROR: MAC address strlen() != 17 -- %d\n", strlen(p)); + printf("ERROR: Bad MAC address format: %s\n", string); + return -1; + } + + for (i = 0; i < 17; i++) { + if ((i % 3) == 2) { + if (p[i] != ':') { + err++; + printf("ERROR: mac: p[%i] != :, found: `%c'\n", + i, p[i]); + break; + } + continue; + } else if (!is_hex(p[i])) { + err++; + printf("ERROR: mac: p[%i] != hex digit, found: `%c'\n", + i, p[i]); + break; + } + } + + if (err != 0) { + printf("ERROR: Bad MAC address format: %s\n", string); + return -1; + } + + /* Convert string to binary */ + for (i = 0, p = (char *)string; i < 6; i++) { + buf[i] = p ? simple_strtoul(p, &end, 16) : 0; + if (p) { + p = (*end) ? end + 1 : end; + } + } + + if (!is_valid_ethaddr((u8 *)buf)) { + printf("ERROR: MAC address must not be 00:00:00:00:00:00, " + "a multicast address or FF:FF:FF:FF:FF:FF.\n"); + printf("ERROR: Bad MAC address format: %s\n", string); + return -1; + } + + return 0; +} + +/** + * set_date + * + * Validates the format of the data string + * + * This function takes a pointer to a date string (i.e. MM/DD/YYYY hh:mm:ss) + * and validates that the format is correct. If so the string is copied + * to the supplied buffer. + */ +static int set_date(char *buf, const char *string) +{ + int i; + + if (!string) { + printf("ERROR: NULL date string passed in.\n"); + return -1; + } + + if (strlen(string) != 19) { + printf("ERROR: Date strlen() != 19 -- %d\n", strlen(string)); + printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n", string); + return -1; + } + + for (i = 0; string[i] != 0; i++) { + switch (i) { + case 2: + case 5: + if (string[i] != '/') { + printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n", string); + return -1; + } + break; + case 10: + if (string[i] != ' ') { + printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n", string); + return -1; + } + break; + case 13: + case 16: + if (string[i] != ':') { + printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n", string); + return -1; + } + break; + default: + if (!is_digit(string[i])) { + printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n", string); + return -1; + } + break; + } + } + + strcpy(buf, string); + return 0; +} + +/** + * set_bytes + * + * Converts a space-separated string of decimal numbers into a + * buffer of bytes. + * + * This function takes a pointer to a space-separated string of decimal + * numbers (i.e. "128 0x55 0321") with "C" standard radix specifiers + * and converts them to an array of bytes. + */ +static int set_bytes(char *buf, const char *string, int * converted_accum) +{ + char *p = (char *) string; + int i; + uint byte; + + if (!p) { + printf("ERROR: NULL string passed in.\n"); + return -1; + } + + /* Convert string to bytes */ + for (i = 0, p = (char *)string; (i < TLV_VALUE_MAX_LEN) && (*p != 0); i++) { + while ((*p == ' ') || (*p == '\t') || (*p == ',') || (*p == ';')) { + p++; + } + if (*p != 0) { + if (!is_digit(*p)) { + printf("ERROR: Non-digit found in byte string: (%s)\n", string); + return -1; + } + byte = simple_strtoul(p, &p, 0); + if (byte >= 256) { + printf("ERROR: The value specified is greater than 255: (%u) in string: %s\n", + byte, string); + return -1; + } + buf[i] = byte & 0xFF; + } + } + + if ((i == TLV_VALUE_MAX_LEN) && (*p != 0)) { + printf("ERROR: Trying to assign too many bytes " + "(max: %d) in string: %s\n", TLV_VALUE_MAX_LEN, string); + return -1; + } + + *converted_accum = i; + return 0; +} + +static void show_tlv_devices(void) +{ + unsigned dev; + + for (dev = 0; dev < MAX_TLV_DEVICES; dev++) + if (tlv_devices[dev]) + printf("TLV: %u%s\n", dev, + (dev == current_dev) ? " (*)" : ""); +} + +static int find_tlv_devices(void) +{ + int ret; + int count_dev = 0; + struct udevice *dev; + + for (ret = uclass_first_device_check(UCLASS_I2C_EEPROM, &dev); + dev; + ret = uclass_next_device_check(&dev)) { + if (ret == 0) + tlv_devices[count_dev++] = dev; + } + + return (count_dev == 0) ? -ENODEV : 0; +} + +/** + * read_sys_eeprom - read the hwinfo from i2c EEPROM + */ +int read_sys_eeprom(void *eeprom, int offset, int len) +{ + int ret; + + if (tlv_devices[current_dev] == NULL) { + ret = find_tlv_devices(); + if (ret) + return ret; + } + + if (tlv_devices[current_dev] == NULL) + return -ENODEV; + + return i2c_eeprom_read(tlv_devices[current_dev], offset, eeprom, len); +} + +/** + * write_sys_eeprom - write the hwinfo to i2c EEPROM + */ +int write_sys_eeprom(void *eeprom, int len) +{ + if (tlv_devices[current_dev] == NULL) + return -ENODEV; + + return i2c_eeprom_write(tlv_devices[current_dev], 0, eeprom, len); +} + +int read_tlvinfo_sys_eeprom(void *eeprom, tlvinfo_header_t **hdr, + tlvinfo_tlv_t **first_entry) +{ + int ret; + tlvinfo_header_t *tlv_hdr; + tlvinfo_tlv_t *tlv_ent; + + /* Read TLV header */ + ret = read_sys_eeprom(eeprom, 0, sizeof(tlvinfo_header_t)); + if (ret < 0) + return ret; + + tlv_hdr = eeprom; + if (!is_valid_tlvinfo_header(tlv_hdr)) + return -EINVAL; + + /* Read TLV entries */ + tlv_ent = (tlvinfo_tlv_t *) &tlv_hdr[1]; + ret = read_sys_eeprom(tlv_ent, sizeof(tlvinfo_header_t), + be16_to_cpu(tlv_hdr->totallen)); + if (ret < 0) + return ret; + if (!is_checksum_valid(eeprom)) + return -EINVAL; + + *hdr = tlv_hdr; + *first_entry = tlv_ent; + + return 0; +} + +int read_tlvinfo_sys_eeprom_dev(void *eeprom, tlvinfo_header_t **hdr, + tlvinfo_tlv_t **first_entry, unsigned devnum) +{ + int ret; + unsigned prev_dev = MAX_TLV_DEVICES + 1; + + if (devnum > MAX_TLV_DEVICES) + return -EINVAL; + + if (devnum != current_dev) { + prev_dev = current_dev; + current_dev = devnum; + has_been_read = 0; + } + + ret = read_tlvinfo_sys_eeprom(eeprom, hdr, first_entry); + if (ret < 0 && prev_dev <= MAX_TLV_DEVICES) + current_dev = prev_dev; + + return ret; +} + +/** + * mac_read_from_eeprom + * + * Read the MAC addresses from EEPROM + * + * This function reads the MAC addresses from EEPROM and sets the + * appropriate environment variables for each one read. + * + * The environment variables are only set if they haven't been set already. + * This ensures that any user-saved variables are never overwritten. + * + * This function must be called after relocation. + */ +int mac_read_from_eeprom(void) +{ + unsigned int i; + int eeprom_index; + tlvinfo_tlv_t * eeprom_tlv; + int maccount; + u8 macbase[6]; + tlvinfo_header_t * eeprom_hdr = (tlvinfo_header_t *) eeprom; + + puts("EEPROM: "); + + if (read_eeprom(eeprom)) { + printf("Read failed.\n"); + return -1; + } + + maccount = 1; + if (tlvinfo_find_tlv(eeprom, TLV_CODE_MAC_SIZE, &eeprom_index)) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + maccount = (eeprom_tlv->value[0] << 8) | eeprom_tlv->value[1]; + } + + memcpy(macbase, "\0\0\0\0\0\0", 6); + if (tlvinfo_find_tlv(eeprom, TLV_CODE_MAC_BASE, &eeprom_index)) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + memcpy(macbase, eeprom_tlv->value, 6); + } + + for (i = 0; i < maccount; i++) { + if (is_valid_ethaddr(macbase)) { + char ethaddr[18]; + char enetvar[11]; + + sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X", + macbase[0], macbase[1], macbase[2], + macbase[3], macbase[4], macbase[5]); + sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i); + /* Only initialize environment variables that are blank + * (i.e. have not yet been set) + */ + if (!env_get(enetvar)) + env_set(enetvar, ethaddr); + + macbase[5]++; + if (macbase[5] == 0) { + macbase[4]++; + if (macbase[4] == 0) { + macbase[3]++; + if (macbase[3] == 0) { + macbase[0] = 0; + macbase[1] = 0; + macbase[2] = 0; + } + } + } + } + } + + printf("%s v%u len=%u\n", eeprom_hdr->signature, eeprom_hdr->version, + be16_to_cpu(eeprom_hdr->totallen)); + + return 0; +} + +/** + * populate_serial_number - read the serial number from EEPROM + * + * This function reads the serial number from the EEPROM and sets the + * appropriate environment variable. + * + * The environment variable is only set if it has not been set + * already. This ensures that any user-saved variables are never + * overwritten. + * + * This function must be called after relocation. + */ +int populate_serial_number(void) +{ + char serialstr[257]; + int eeprom_index; + tlvinfo_tlv_t * eeprom_tlv; + + if (env_get("serial#")) + return 0; + + if (read_eeprom(eeprom)) { + printf("Read failed.\n"); + return -1; + } + + if (tlvinfo_find_tlv(eeprom, TLV_CODE_SERIAL_NUMBER, &eeprom_index)) { + eeprom_tlv = (tlvinfo_tlv_t *) &eeprom[eeprom_index]; + memcpy(serialstr, eeprom_tlv->value, eeprom_tlv->length); + serialstr[eeprom_tlv->length] = 0; + env_set("serial#", serialstr); + } + + return 0; +} diff --git a/include/sys_eeprom.h b/include/sys_eeprom.h new file mode 100644 index 000000000000..49a7ee87d9db --- /dev/null +++ b/include/sys_eeprom.h @@ -0,0 +1,169 @@ +/* + * See file CREDITS for list of people who contributed to this + * project. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __SYS_EEPROM_H_ +#define __SYS_EEPROM_H_ + +/* + * Without getting too philosophical, define truth, falsehood, and the + * boolean type, if they are not already defined. + */ +#ifndef FALSE +#define FALSE 0 +#endif + +#ifndef TRUE +#define TRUE (!FALSE) +#endif + +#ifndef bool +typedef unsigned char bool; +#endif + +#ifndef is_digit +#define is_digit(c) ((c) >= '0' && (c) <= '9') +#endif + +/* + * The Definition of the TlvInfo EEPROM format can be found at onie.org or + * github.com/onie + */ + +/* + * TlvInfo header: Layout of the header for the TlvInfo format + * + * See the end of this file for details of this eeprom format + */ +struct __attribute__ ((__packed__)) tlvinfo_header_s { + char signature[8]; /* 0x00 - 0x07 EEPROM Tag "TlvInfo" */ + u8 version; /* 0x08 Structure version */ + u16 totallen; /* 0x09 - 0x0A Length of all data which follows */ +}; +typedef struct tlvinfo_header_s tlvinfo_header_t; + +// Header Field Constants +#define TLV_INFO_ID_STRING "TlvInfo" +#define TLV_INFO_VERSION 0x01 +#define TLV_INFO_MAX_LEN 2048 +#define TLV_TOTAL_LEN_MAX (TLV_INFO_MAX_LEN - sizeof(tlvinfo_header_t)) + +/* + * TlvInfo TLV: Layout of a TLV field + */ +struct __attribute__ ((__packed__)) tlvinfo_tlv_s { + u8 type; + u8 length; + u8 value[0]; +}; +typedef struct tlvinfo_tlv_s tlvinfo_tlv_t; + +/* Maximum length of a TLV value in bytes */ +#define TLV_VALUE_MAX_LEN 255 + +/** + * The TLV Types. + * + * Keep these in sync with tlv_code_list in cmd_sys_eeprom.c + */ +#define TLV_CODE_PRODUCT_NAME 0x21 +#define TLV_CODE_PART_NUMBER 0x22 +#define TLV_CODE_SERIAL_NUMBER 0x23 +#define TLV_CODE_MAC_BASE 0x24 +#define TLV_CODE_MANUF_DATE 0x25 +#define TLV_CODE_DEVICE_VERSION 0x26 +#define TLV_CODE_LABEL_REVISION 0x27 +#define TLV_CODE_PLATFORM_NAME 0x28 +#define TLV_CODE_ONIE_VERSION 0x29 +#define TLV_CODE_MAC_SIZE 0x2A +#define TLV_CODE_MANUF_NAME 0x2B +#define TLV_CODE_MANUF_COUNTRY 0x2C +#define TLV_CODE_VENDOR_NAME 0x2D +#define TLV_CODE_DIAG_VERSION 0x2E +#define TLV_CODE_SERVICE_TAG 0x2F +#define TLV_CODE_VENDOR_EXT 0xFD +#define TLV_CODE_CRC_32 0xFE + +/** + * read_sys_eeprom - Read the EEPROM binary data from the hardware + * @eeprom: Pointer to buffer to hold the binary data + * @offset: Offset within EEPROM block to read data from + * @len : Maximum size of buffer + * + * Note: this routine does not validate the EEPROM data. + * + */ + +extern int read_sys_eeprom(void *eeprom, int offset, int len); + +/** + * write_sys_eeprom - Write the entire EEPROM binary data to the hardware + * @eeprom: Pointer to buffer to hold the binary data + * @len : Maximum size of buffer + * + * Note: this routine does not validate the EEPROM data. + * + */ +extern int write_sys_eeprom(void *eeprom, int len); + +/** + * read_tlvinfo_sys_eeprom - Read the TLV from EEPROM, and validate + * @eeprom: Pointer to buffer to hold the binary data. Must point to a buffer + * of size at least TLV_INFO_MAX_LEN. + * @hdr : Points to pointer to TLV header (output) + * @first_entry : Points to pointer to first TLV entry (output) + * + * Store the raw EEPROM data in the @eeprom buffer. If TLV is valid set *@hdr + * and *@first_entry. + * + * Returns 0 when read from EEPROM is successful, and the data is valid. + * Returns <0 error value when EEPROM read fails. Return -EINVAL when TLV is + * invalid. + * + */ + +extern int read_tlvinfo_sys_eeprom(void *eeprom, tlvinfo_header_t **hdr, + tlvinfo_tlv_t **first_entry); + +/** + * read_tlvinfo_sys_eeprom_dev - Read the TLV from specific EEPROM, and validate + * @eeprom: Pointer to buffer to hold the binary data. Must point to a buffer + * of size at least TLV_INFO_MAX_LEN. + * @hdr : Points to pointer to TLV header (output) + * @first_entry : Points to pointer to first TLV entry (output) + * @dev : EEPROM device to read + * + * Store the raw EEPROM data from EEPROM @dev in the @eeprom buffer. If TLV is + * valid set *@hdr and *@first_entry. + * + * Returns 0 when read from EEPROM is successful, and the data is valid. + * Returns <0 error value when EEPROM read fails. Return -EINVAL when TLV is + * invalid. + * + */ + +extern int read_tlvinfo_sys_eeprom_dev(void *eeprom, tlvinfo_header_t **hdr, + tlvinfo_tlv_t **first_entry, unsigned devnum); + +/** + * is_valid_tlvinfo_header + * + * Perform sanity checks on the first 11 bytes of the TlvInfo EEPROM + * data pointed to by the parameter: + * 1. First 8 bytes contain null-terminated ASCII string "TlvInfo" + * 2. Version byte is 1 + * 3. Total length bytes contain value which is less than or equal + * to the allowed maximum (2048-11) + * + */ +static inline bool is_valid_tlvinfo_header(tlvinfo_header_t *hdr) +{ + return( (strcmp(hdr->signature, TLV_INFO_ID_STRING) == 0) && + (hdr->version == TLV_INFO_VERSION) && + (be16_to_cpu(hdr->totallen) <= TLV_TOTAL_LEN_MAX) ); +} + +#endif /* __SYS_EEPROM_H_ */