@@ -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
@@ -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
@@ -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,
@@ -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 */
new file mode 100644
@@ -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
new file mode 100644
@@ -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 */
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