From: Andreas Bießmann andreas.biessmann@corscience.de
The new tricordereeprom command can read and write the eeprom for hardware detection on tricorder devices.
Signed-off-by: Andreas Bießmann andreas.biessmann@corscience.de --- board/corscience/tricorder/Makefile | 2 +- board/corscience/tricorder/tricorder-eeprom.c | 251 +++++++++++++++++++++++++ board/corscience/tricorder/tricorder-eeprom.h | 41 ++++ include/configs/tricorder.h | 7 + 4 files changed, 300 insertions(+), 1 deletion(-) create mode 100644 board/corscience/tricorder/tricorder-eeprom.c create mode 100644 board/corscience/tricorder/tricorder-eeprom.h
diff --git a/board/corscience/tricorder/Makefile b/board/corscience/tricorder/Makefile index 2ab12bb..22ad8c5 100644 --- a/board/corscience/tricorder/Makefile +++ b/board/corscience/tricorder/Makefile @@ -12,7 +12,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(BOARD).o
-COBJS := tricorder.o +COBJS := tricorder.o tricorder-eeprom.o
SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/corscience/tricorder/tricorder-eeprom.c b/board/corscience/tricorder/tricorder-eeprom.c new file mode 100644 index 0000000..1c74a0f --- /dev/null +++ b/board/corscience/tricorder/tricorder-eeprom.c @@ -0,0 +1,251 @@ +/* + * (C) Copyright 2013 + * Corscience GmbH & Co. KG, <www.corscience.de> + * Andreas Bießmann andreas.biessmann@corscience.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <i2c.h> + +#include "tricorder-eeprom.h" + +static inline void warn_wrong_value(const char *msg, unsigned int a, + unsigned int b) +{ + printf("Expected EEPROM %s %08x, got %08x\n", msg, a, b); +} + +static int handle_eeprom_v0(struct tricorder_eeprom *eeprom) +{ + struct tricorder_eeprom_v0 { + uint32_t magic; + uint16_t length; + uint16_t version; + char board_name[TRICORDER_BOARD_NAME_LENGTH]; + char board_version[TRICORDER_BOARD_VERSION_LENGTH]; + char board_serial[TRICORDER_BOARD_SERIAL_LENGTH]; + uint32_t crc32; + } __packed eepromv0; + uint32_t crc; + + printf("Old EEPROM (v0), consider rewrite!\n"); + + if (be16_to_cpu(eeprom->length) != sizeof(eepromv0)) { + warn_wrong_value("length", sizeof(eepromv0), + be16_to_cpu(eeprom->length)); + return 1; + } + + memcpy(&eepromv0, eeprom, sizeof(eepromv0)); + + crc = crc32(0L, (unsigned char *)&eepromv0, + sizeof(eepromv0) - sizeof(eepromv0.crc32)); + if (be32_to_cpu(eepromv0.crc32) != crc) { + warn_wrong_value("CRC", be32_to_cpu(eepromv0.crc32), + crc); + return 1; + } + + /* Ok the content is correct, do the conversion */ + memset(eeprom->interface_version, 0x0, + TRICORDER_INTERFACE_VERSION_LENGTH); + crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE); + eeprom->crc32 = cpu_to_be32(crc); + + return 0; +} + +static int handle_eeprom_v1(struct tricorder_eeprom *eeprom) +{ + uint32_t crc; + + if (be16_to_cpu(eeprom->length) != TRICORDER_EEPROM_SIZE) { + warn_wrong_value("length", TRICORDER_EEPROM_SIZE, + be16_to_cpu(eeprom->length)); + return 1; + } + + crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE); + if (be32_to_cpu(eeprom->crc32) != crc) { + warn_wrong_value("CRC", be32_to_cpu(eeprom->crc32), crc); + return 1; + } + + return 0; +} + +int tricorder_get_eeprom(int addr, struct tricorder_eeprom *eeprom) +{ +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + unsigned int bus = i2c_get_bus_num(); + i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM); +#endif + + memset(eeprom, 0, TRICORDER_EEPROM_SIZE); + + i2c_read(addr, 0, 2, (unsigned char *)eeprom, TRICORDER_EEPROM_SIZE); +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + i2c_set_bus_num(bus); +#endif + + if (be32_to_cpu(eeprom->magic) != TRICORDER_EEPROM_MAGIC) { + warn_wrong_value("magic", TRICORDER_EEPROM_MAGIC, + be32_to_cpu(eeprom->magic)); + return 1; + } + + switch (be16_to_cpu(eeprom->version)) { + case 0: + return handle_eeprom_v0(eeprom); + case 1: + return handle_eeprom_v1(eeprom); + default: + warn_wrong_value("version", TRICORDER_EEPROM_VERSION, + be16_to_cpu(eeprom->version)); + return 1; + } +} + +#if !defined(CONFIG_SPL) +int tricorder_eeprom_read(unsigned devaddr) +{ + struct tricorder_eeprom eeprom; + int ret = tricorder_get_eeprom(devaddr, &eeprom); + + if (ret) + return ret; + + printf("Board type: %.*s\n", + sizeof(eeprom.board_name), eeprom.board_name); + printf("Board version: %.*s\n", + sizeof(eeprom.board_version), eeprom.board_version); + printf("Board serial: %.*s\n", + sizeof(eeprom.board_serial), eeprom.board_serial); + printf("Board interface version: %.*s\n", + sizeof(eeprom.interface_version), + eeprom.interface_version); + + return ret; +} + +int tricorder_eeprom_write(unsigned devaddr, const char *name, + const char *version, const char *serial, const char *interface) +{ + struct tricorder_eeprom eeprom, eeprom_verify; + size_t length; + uint32_t crc; + int ret; + unsigned char *p; + int i; +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + unsigned int bus; +#endif + + memset(eeprom, 0, TRICORDER_EEPROM_SIZE); + memset(eeprom_verify, 0, TRICORDER_EEPROM_SIZE); + + eeprom.magic = cpu_to_be32(TRICORDER_EEPROM_MAGIC); + eeprom.length = cpu_to_be16(TRICORDER_EEPROM_SIZE); + eeprom.version = cpu_to_be16(TRICORDER_EEPROM_VERSION); + + length = min(sizeof(eeprom.board_name), strlen(name)); + strncpy(eeprom.board_name, name, length); + + length = min(sizeof(eeprom.board_version), strlen(version)); + strncpy(eeprom.board_version, version, length); + + length = min(sizeof(eeprom.board_serial), strlen(serial)); + strncpy(eeprom.board_serial, serial, length); + + if (interface) { + length = min(sizeof(eeprom.interface_version), + strlen(interface)); + strncpy(eeprom.interface_version, interface, length); + } + + crc = crc32(0L, (unsigned char *)&eeprom, TRICORDER_EEPROM_CRC_SIZE); + eeprom.crc32 = cpu_to_be32(crc); + +#if defined(DEBUG) + puts("Tricorder EEPROM content:\n"); + print_buffer(0, &eeprom, 1, sizeof(eeprom), 16); +#endif + +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + bus = i2c_get_bus_num(); + i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM); +#endif + + /* do page write to the eeprom */ + for (i = 0, p = (unsigned char *)&eeprom; + i < sizeof(eeprom); + i += 32, p += 32) { + ret = i2c_write(devaddr, i, CONFIG_SYS_I2C_EEPROM_ADDR_LEN, + p, min(sizeof(eeprom) - i, 32)); + if (ret) + break; + udelay(5000); /* 5ms write cycle timing */ + } + + ret = i2c_read(devaddr, 0, 2, (unsigned char *)&eeprom_verify, + TRICORDER_EEPROM_SIZE); + + if (memcmp(&eeprom, &eeprom_verify, sizeof(eeprom)) != 0) { + printf("Tricorder: Could not verify EEPROM content!\n"); + ret = 1; + } + +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + i2c_set_bus_num(bus); +#endif + return ret; +} + +int do_tricorder_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + if (argc == 3) { + ulong dev_addr = simple_strtoul(argv[2], NULL, 16); + eeprom_init(); + if (strcmp(argv[1], "read") == 0) { + int rcode; + + rcode = tricorder_eeprom_read(dev_addr); + + return rcode; + } + } else if (argc == 6 || argc == 7) { + ulong dev_addr = simple_strtoul(argv[2], NULL, 16); + char *name = argv[3]; + char *version = argv[4]; + char *serial = argv[5]; + char *interface = NULL; + eeprom_init(); + + if (argc == 7) + interface = argv[6]; + + if (strcmp(argv[1], "write") == 0) { + int rcode; + + rcode = tricorder_eeprom_write(dev_addr, name, version, + serial, interface); + + return rcode; + } + } + + return CMD_RET_USAGE; +} + +U_BOOT_CMD( + tricordereeprom, 7, 1, do_tricorder_eeprom, + "Tricorder EEPROM", + "read devaddr\n" + " - read Tricorder EEPROM at devaddr and print content\n" + "tricordereeprom write devaddr name version serial [interface]\n" + " - write Tricorder EEPROM at devaddr with 'name', 'version'" + "and 'serial'\n" + " optional add an HW interface parameter" +); +#endif /* CONFIG_SPL */ diff --git a/board/corscience/tricorder/tricorder-eeprom.h b/board/corscience/tricorder/tricorder-eeprom.h new file mode 100644 index 0000000..06ed9a5 --- /dev/null +++ b/board/corscience/tricorder/tricorder-eeprom.h @@ -0,0 +1,41 @@ +/* + * (C) Copyright 2013 + * Corscience GmbH & Co. KG, <www.corscience.de> + * Andreas Bießmann andreas.biessmann@corscience.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef TRICORDER_EEPROM_H_ +#define TRICORDER_EEPROM_H_ + +#include <linux/compiler.h> + +#define TRICORDER_EEPROM_MAGIC 0xc2a94f52 +#define TRICORDER_EEPROM_VERSION 1 + +#define TRICORDER_BOARD_NAME_LENGTH 12 +#define TRICORDER_BOARD_VERSION_LENGTH 4 +#define TRICORDER_BOARD_SERIAL_LENGTH 12 +#define TRICORDER_INTERFACE_VERSION_LENGTH 4 + +struct tricorder_eeprom { + uint32_t magic; + uint16_t length; + uint16_t version; + char board_name[TRICORDER_BOARD_NAME_LENGTH]; + char board_version[TRICORDER_BOARD_VERSION_LENGTH]; + char board_serial[TRICORDER_BOARD_SERIAL_LENGTH]; + char interface_version[TRICORDER_INTERFACE_VERSION_LENGTH]; + uint32_t crc32; +} __packed; + +#define TRICORDER_EEPROM_SIZE sizeof(struct tricorder_eeprom) +#define TRICORDER_EEPROM_CRC_SIZE (TRICORDER_EEPROM_SIZE - \ + sizeof(uint32_t)) + +/** + * @brief read eeprom information from a specific eeprom address + */ +int tricorder_get_eeprom(int addr, struct tricorder_eeprom *eeprom); + +#endif /* TRICORDER_EEPROM_H_ */ diff --git a/include/configs/tricorder.h b/include/configs/tricorder.h index abd5bb3..9e4e0f0 100644 --- a/include/configs/tricorder.h +++ b/include/configs/tricorder.h @@ -82,6 +82,13 @@ #define CONFIG_SYS_I2C_SPEED 100000 #define CONFIG_SYS_I2C_SLAVE 1 #define CONFIG_DRIVER_OMAP34XX_I2C 1 +#define CONFIG_I2C_MULTI_BUS + +/* EEPROM */ +#define CONFIG_SYS_I2C_MULTI_EEPROMS +#define CONFIG_CMD_EEPROM +#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 2 +#define CONFIG_SYS_EEPROM_BUS_NUM 1
/* TWL4030 */ #define CONFIG_TWL4030_POWER