The EEPROM image length for API v2 is fixed to 32 bytes. No need to use sizeof while this value won't change. This value is also be required for API v3 to know where the API v3 header starts.

Signed-off-by: Daniel Schultz d.schultz@phytec.de --- board/phytec/common/phytec_som_detection.c | 9 ++++----- board/phytec/common/phytec_som_detection.h | 2 ++ 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/board/phytec/common/phytec_som_detection.c b/board/phytec/common/phytec_som_detection.c index a089fe9bc90..f0e35d8d2ec 100644 --- a/board/phytec/common/phytec_som_detection.c +++ b/board/phytec/common/phytec_som_detection.c @@ -78,13 +78,12 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data, int ret, i; unsigned int crc; u8 *ptr; - const unsigned int payload_size = sizeof(struct phytec_eeprom_payload);

if (!data) data = &eeprom_data;

ret = phytec_eeprom_read((u8 *)data, bus_num, addr, - payload_size, 0); + PHYTEC_API2_DATA_LEN, 0); if (ret) goto err;

@@ -95,11 +94,11 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data, }

ptr = (u8 *)data; - for (i = 0; i < payload_size; ++i) + for (i = 0; i < PHYTEC_API2_DATA_LEN; ++i) if (ptr[i] != 0x0) break;

- if (i == payload_size) { + if (i == PHYTEC_API2_DATA_LEN) { pr_err("%s: EEPROM data is all zero. Erased?\n", __func__); ret = -EINVAL; goto err; @@ -111,7 +110,7 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data, return 0; }

- crc = crc8(0, (const unsigned char *)&data->payload, payload_size); + crc = crc8(0, (const unsigned char *)&data->payload, PHYTEC_API2_DATA_LEN); debug("%s: crc: %x\n", __func__, crc);

if (crc) { diff --git a/board/phytec/common/phytec_som_detection.h b/board/phytec/common/phytec_som_detection.h index 0ad5c14ef4e..1ccf36c8e7a 100644 --- a/board/phytec/common/phytec_som_detection.h +++ b/board/phytec/common/phytec_som_detection.h @@ -10,6 +10,8 @@ #define PHYTEC_MAX_OPTIONS 17 #define PHYTEC_EEPROM_INVAL 0xff

+#define PHYTEC_API2_DATA_LEN 32 + #define PHYTEC_GET_OPTION(option) \ (((option) > '9') ? (option) - 'A' + 10 : (option) - '0')

This API is based on a block structure with a 8 Byte large API v3 header and various of different blocks following. It extends our current API v2, which is always 32 Byte large, and is located directly after v2.

Add the MAC block as first block type. It contains the physical Ehternet interface number, a MAC address and a CRC checksum over the MAC payload.

Signed-off-by: Daniel Schultz d.schultz@phytec.de --- board/phytec/common/Kconfig | 9 ++ board/phytec/common/Makefile | 2 +- board/phytec/common/phytec_som_detection.c | 153 ++++++++++++++++++ board/phytec/common/phytec_som_detection.h | 7 + .../common/phytec_som_detection_blocks.c | 105 ++++++++++++ .../common/phytec_som_detection_blocks.h | 61 +++++++ 6 files changed, 336 insertions(+), 1 deletion(-) create mode 100644 board/phytec/common/phytec_som_detection_blocks.c create mode 100644 board/phytec/common/phytec_som_detection_blocks.h

diff --git a/board/phytec/common/Kconfig b/board/phytec/common/Kconfig index 1077f0f4b61..668afe2a534 100644 --- a/board/phytec/common/Kconfig +++ b/board/phytec/common/Kconfig @@ -4,6 +4,13 @@ config PHYTEC_SOM_DETECTION help Support of I2C EEPROM based SoM detection.

+config PHYTEC_SOM_DETECTION_BLOCKS + bool "Extend SoM detection with block support" + depends on PHYTEC_SOM_DETECTION + help + Extend the I2C EEPROM based SoM detection with API v3. This API + introduces blocks with different payloads. + config PHYTEC_IMX8M_SOM_DETECTION bool "Support SoM detection for i.MX8M PHYTEC platforms" depends on ARCH_IMX8M && PHYTEC_SOM_DETECTION @@ -16,6 +23,7 @@ config PHYTEC_AM62_SOM_DETECTION bool "Support SoM detection for AM62x PHYTEC platforms" depends on (TARGET_PHYCORE_AM62X_A53 || TARGET_PHYCORE_AM62X_R5) && \ PHYTEC_SOM_DETECTION + select PHYTEC_SOM_DETECTION_BLOCKS default y help Support of I2C EEPROM based SoM detection. Supported @@ -25,6 +33,7 @@ config PHYTEC_AM64_SOM_DETECTION bool "Support SoM detection for AM64x PHYTEC platforms" depends on (TARGET_PHYCORE_AM64X_A53 || TARGET_PHYCORE_AM64X_R5) && \ PHYTEC_SOM_DETECTION + select PHYTEC_SOM_DETECTION_BLOCKS default y help Support of I2C EEPROM based SoM detection. Supported diff --git a/board/phytec/common/Makefile b/board/phytec/common/Makefile index c34fc503059..446c481a6e6 100644 --- a/board/phytec/common/Makefile +++ b/board/phytec/common/Makefile @@ -9,6 +9,6 @@ else obj-$(CONFIG_ARCH_K3) += k3/ endif

-obj-y += phytec_som_detection.o +obj-y += phytec_som_detection.o phytec_som_detection_blocks.o obj-$(CONFIG_ARCH_K3) += am6_som_detection.o obj-$(CONFIG_ARCH_IMX8M) += imx8m_som_detection.o diff --git a/board/phytec/common/phytec_som_detection.c b/board/phytec/common/phytec_som_detection.c index ab2d5a7b726..166c3eae565 100644 --- a/board/phytec/common/phytec_som_detection.c +++ b/board/phytec/common/phytec_som_detection.c @@ -91,6 +91,134 @@ int phytec_eeprom_data_init_v2(struct phytec_eeprom_data *data) return 0; }

+#if IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION_BLOCKS) + +int phytec_eeprom_data_init_v3_block(struct phytec_eeprom_data *data, + struct phytec_api3_block_header *header, + u8 *payload) +{ + struct phytec_api3_element *element = NULL; + struct phytec_api3_element *list_iterator; + + if (!header) + return -1; + if (!payload) + return -1; + + debug("%s: block type: %i\n", __func__, header->block_type); + switch (header->block_type) { + case PHYTEC_API3_BLOCK_MAC: + element = phytec_blocks_init_mac(header, payload); + break; + default: + debug("%s: Unknown block type %i\n", __func__, + header->block_type); + } + if (!element) + return -1; + + if (!data->payload.block_head) { + data->payload.block_head = element; + return 0; + } + + list_iterator = data->payload.block_head; + while (list_iterator && list_iterator->next) + list_iterator = list_iterator->next; + list_iterator->next = element; + + return 0; +} + +int phytec_eeprom_data_init_v3(struct phytec_eeprom_data *data, + int bus_num, int addr) +{ + int ret, i; + struct phytec_api3_header header; + unsigned int crc; + u8 *payload; + int block_addr; + struct phytec_api3_block_header *block_header; + + if (!data) + return -1; + + ret = phytec_eeprom_read((uint8_t *)&header, bus_num, addr, + PHYTEC_API3_DATA_HEADER_LEN, + PHYTEC_API2_DATA_LEN); + if (ret) { + pr_err("%s: Failed to read API v3 data header.\n", __func__); + goto err; + } + + crc = crc8(0, (const unsigned char *)&header, + PHYTEC_API3_DATA_HEADER_LEN); + debug("%s: crc: %x\n", __func__, crc); + if (crc) { + pr_err("%s: CRC mismatch. API3 header is unusable.\n", + __func__); + goto err; + } + + debug("%s: data length: %i\n", __func__, header.data_length); + payload = malloc(header.data_length); + if (!payload) { + pr_err("%s: Unable to allocate memory\n", __func__); + goto err_payload; + } + + ret = phytec_eeprom_read(payload, bus_num, addr, header.data_length, + PHYTEC_API3_DATA_HEADER_LEN + + PHYTEC_API2_DATA_LEN); + if (ret) { + pr_err("%s: Failed to read API v3 data payload.\n", __func__); + goto err_payload; + } + + block_addr = 0; + debug("%s: block count: %i\n", __func__, header.block_count); + for (i = 0; i < header.block_count; i++) { + debug("%s: block_addr: %i\n", __func__, block_addr); + block_header = (struct phytec_api3_block_header *) + &payload[block_addr]; + crc = crc8(0, (const unsigned char *)block_header, + PHYTEC_API3_BLOCK_HEADER_LEN); + + debug("%s: crc: %x\n", __func__, crc); + if (crc) { + pr_err("%s: CRC mismatch. API3 block header is unusable\n", + __func__); + goto err_payload; + } + + ret = phytec_eeprom_data_init_v3_block(data, block_header, + &payload[block_addr + PHYTEC_API3_BLOCK_HEADER_LEN]); + /* Ignore failed block initialization and continue. */ + if (ret) + debug("%s: Unable to create block with index %i.\n", + __func__, i); + + block_addr = block_header->next_block; + } + + free(payload); + return 0; +err_payload: + free(payload); +err: + return -1; +} + +#else + +inline int phytec_eeprom_data_init_v3(struct phytec_eeprom_data *data, + int bus_num, int addr) +{ + return 0; +} + +#endif + int phytec_eeprom_data_init(struct phytec_eeprom_data *data, int bus_num, int addr) { @@ -104,6 +232,7 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data, PHYTEC_API2_DATA_LEN, 0); if (ret) goto err; + data->payload.block_head = NULL;

if (data->payload.api_rev == 0xff) { pr_err("%s: EEPROM is not flashed. Prototype?\n", __func__); @@ -128,6 +257,13 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data, goto err; }

+ if (IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION_BLOCKS)) + if (data->payload.api_rev >= PHYTEC_API_REV3) { + ret = phytec_eeprom_data_init_v3(data, bus_num, addr); + if (ret) + goto err; + } + data->valid = true; return 0; err: @@ -265,6 +401,17 @@ struct extension *phytec_add_extension(const char *name, const char *overlay, } #endif /* IS_ENABLED(CONFIG_CMD_EXTENSION) */

+struct phytec_api3_element * + __maybe_unused phytec_get_block_head(struct phytec_eeprom_data *data) +{ + if (!data) + data = &eeprom_data; + if (!data->valid) + return NULL; + + return data->payload.block_head; +} + #else

inline int phytec_eeprom_data_setup(struct phytec_eeprom_data *data, @@ -305,6 +452,12 @@ u8 __maybe_unused phytec_get_som_type(struct phytec_eeprom_data *data) return PHYTEC_EEPROM_INVAL; }

+inline struct phytec_api3_element * __maybe_unused + phytec_get_block_head(struct phytec_eeprom_data *data) +{ + return NULL; +} + #if IS_ENABLED(CONFIG_CMD_EXTENSION) inline struct extension *phytec_add_extension(const char *name, const char *overlay, diff --git a/board/phytec/common/phytec_som_detection.h b/board/phytec/common/phytec_som_detection.h index 1ccf36c8e7a..5e35a13cb21 100644 --- a/board/phytec/common/phytec_som_detection.h +++ b/board/phytec/common/phytec_som_detection.h @@ -7,6 +7,8 @@ #ifndef _PHYTEC_SOM_DETECTION_H #define _PHYTEC_SOM_DETECTION_H

+#include "phytec_som_detection_blocks.h" + #define PHYTEC_MAX_OPTIONS 17 #define PHYTEC_EEPROM_INVAL 0xff

@@ -19,6 +21,7 @@ enum { PHYTEC_API_REV0 = 0, PHYTEC_API_REV1, PHYTEC_API_REV2, + PHYTEC_API_REV3, };

enum phytec_som_type_str { @@ -63,6 +66,7 @@ struct phytec_eeprom_payload { struct phytec_api0_data data_api0; struct phytec_api2_data data_api2; } data; + struct phytec_api3_element *block_head; } __packed;

struct phytec_eeprom_data { @@ -88,4 +92,7 @@ struct extension *phytec_add_extension(const char *name, const char *overlay, const char *other); #endif /* IS_ENABLED(CONFIG_CMD_EXTENSION) */

+struct phytec_api3_element * + __maybe_unused phytec_get_block_head(struct phytec_eeprom_data *data); + #endif /* _PHYTEC_SOM_DETECTION_H */ diff --git a/board/phytec/common/phytec_som_detection_blocks.c b/board/phytec/common/phytec_som_detection_blocks.c new file mode 100644 index 00000000000..5f3c27ef0c2 --- /dev/null +++ b/board/phytec/common/phytec_som_detection_blocks.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2024 PHYTEC Messtechnik GmbH + * Author: Daniel Schultz d.schultz@phytec.de + */ + +#include <malloc.h> +#include <u-boot/crc.h> +#include <net.h> +#include <vsprintf.h> + +#include "phytec_som_detection_blocks.h" + +#if IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION_BLOCKS) + +struct phytec_api3_element * + phytec_blocks_init_mac(struct phytec_api3_block_header *header, + uint8_t *payload) +{ + struct phytec_api3_element *element; + struct phytec_api3_block_mac *mac; + unsigned int crc; + unsigned int len = sizeof(struct phytec_api3_block_mac); + + if (!header) + return NULL; + if (!payload) + return NULL; + + element = (struct phytec_api3_element *) + calloc(8, PHYTEC_API3_ELEMENT_HEADER_SIZE + len); + if (!element) { + pr_err("%s: Unable to allocate memory\n", __func__); + return NULL; + } + element->block_type = header->block_type; + memcpy(&element->block.mac, payload, len); + mac = &element->block.mac; + + debug("%s: interface: %i\n", __func__, mac->interface); + debug("%s: MAC %pM\n", __func__, mac->address); + + crc = crc8(0, (const unsigned char *)mac, len); + debug("%s: crc: %x\n", __func__, crc); + if (crc) { + pr_err("%s: CRC mismatch. API3 block payload is unusable\n", + __func__); + return NULL; + } + + return element; +} + +int __maybe_unused + phytec_blocks_add_mac_to_env(struct phytec_api3_element *element) +{ + char enetenv[9] = "ethaddr"; + char buf[ARP_HLEN_ASCII + 1]; + struct phytec_api3_block_mac *block = &element->block.mac; + int ret; + + if (!is_valid_ethaddr(block->address)) { + pr_err("%s: Invalid MAC address in block.\n", __func__); + return -1; + } + + if (block->interface > 0) { + ret = sprintf(enetenv, "eth%iaddr", block->interface); + if (ret != 8) { + pr_err("%s: Unable to create env string\n", __func__); + return -1; + } + } + + ret = sprintf(buf, "%pM", block->address); + if (ret != ARP_HLEN_ASCII) { + pr_err("%s: Unable to convert MAC address\n", __func__); + return -1; + } + ret = env_set(enetenv, buf); + if (ret) { + pr_err("%s: Failed to set MAC address to env.\n", __func__); + return -1; + } + + debug("%s: Added %s to %s\n", __func__, buf, enetenv); + return 0; +} + +#else + +inline struct phytec_api3_element * + phytec_api3_init_mac_block(struct phytec_api3_block_header *header, + uint8_t *payload) +{ + return NULL; +} + +inline int __maybe_unused + phytec_blocks_add_mac_to_env(struct phytec_api3_element *element) +{ + return -1; +} + +#endif diff --git a/board/phytec/common/phytec_som_detection_blocks.h b/board/phytec/common/phytec_som_detection_blocks.h new file mode 100644 index 00000000000..2a5a83c9039 --- /dev/null +++ b/board/phytec/common/phytec_som_detection_blocks.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2024 PHYTEC Messtechnik GmbH + * Author: Daniel Schultz d.schultz@phytec.de + */ + +#ifndef _PHYTEC_SOM_DETECTION_BLOCKS_H +#define _PHYTEC_SOM_DETECTION_BLOCKS_H + +#define PHYTEC_API3_DATA_HEADER_LEN 8 +#define PHYTEC_API3_BLOCK_HEADER_LEN 4 +#define PHYTEC_API3_PAYLOAD_START \ + (PHYTEC_API2_DATA_LEN + PHYTEC_API3_DATA_HEADER_LEN) + +#define PHYTEC_API3_ELEMENT_HEADER_SIZE \ + (sizeof(struct phytec_api3_element *) + \ + sizeof(enum phytec_api3_block_types)) + +#define PHYTEC_API3_FOREACH_BLOCK(elem, data) \ + for (elem = phytec_get_block_head(data); elem; elem = elem->next) + +struct phytec_api3_header { + u16 data_length; /* Total length in Bytes of all blocks */ + u8 block_count; /* Number of blocks */ + u8 sub_version; /* Block specification version */ + u8 reserved[3]; /* Reserved */ + u8 crc8; /* checksum */ +} __packed; + +struct phytec_api3_block_header { + u8 block_type; /* Block payload identifier */ + u16 next_block; /* Address of the next block */ + u8 crc8; /* checksum */ +} __packed; + +enum phytec_api3_block_types { + PHYTEC_API3_BLOCK_MAC = 0, +}; + +struct phytec_api3_block_mac { + u8 interface; /* Ethernet interface number */ + u8 address[6]; /* MAC-Address */ + u8 crc8; /* checksum */ +} __packed; + +struct phytec_api3_element { + struct phytec_api3_element *next; + enum phytec_api3_block_types block_type; + union { + struct phytec_api3_block_mac mac; + } block; +} __packed; + +struct phytec_api3_element * + phytec_blocks_init_mac(struct phytec_api3_block_header *header, + uint8_t *payload); + +int __maybe_unused +phytec_blocks_add_mac_to_env(struct phytec_api3_element *element); + +#endif /* _PHYTEC_SOM_DETECTION_BLOCKS_H */