eeprom: starfive: Enable ID EEPROM configuration
Enabled ID_EEPROM configuration for StarFive VisionFive2 board.
Signed-off-by: Yanhong Wang <yanhong.wang@starfivetech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/arch/riscv/include/asm/arch-jh7110/eeprom.h b/arch/riscv/include/asm/arch-jh7110/eeprom.h
new file mode 100644
index 0000000..f354d5c
--- /dev/null
+++ b/arch/riscv/include/asm/arch-jh7110/eeprom.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ * Author: Yanhong Wang<yanhong.wang@starfivetech.com>
+ */
+
+#ifndef _ASM_RISCV_EEPROM_H
+#define _ASM_RISCV_EEPROM_H
+
+u8 get_pcb_revision_from_eeprom(void);
+u32 get_ddr_size_from_eeprom(void);
+
+#endif /* _ASM_RISCV_EEPROM_H */
diff --git a/board/starfive/visionfive2/Makefile b/board/starfive/visionfive2/Makefile
index 66c854d..c7ba4f7 100644
--- a/board/starfive/visionfive2/Makefile
+++ b/board/starfive/visionfive2/Makefile
@@ -5,3 +5,4 @@
obj-y := starfive_visionfive2.o
obj-$(CONFIG_SPL_BUILD) += spl.o
+obj-$(CONFIG_ID_EEPROM) += visionfive2-i2c-eeprom.o
diff --git a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
new file mode 100644
index 0000000..befe788
--- /dev/null
+++ b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
@@ -0,0 +1,561 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ * Author: Yanhong Wang<yanhong.wang@starfivetech.com>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <env.h>
+#include <i2c.h>
+#include <init.h>
+#include <u-boot/crc.h>
+#include <linux/delay.h>
+
+#define FORMAT_VERSION 0x2
+#define PCB_VERSION 0xB1
+#define BOM_VERSION 'A'
+/*
+ * BYTES_PER_EEPROM_PAGE: the 24FC04H datasheet says that data can
+ * only be written in page mode, which means 16 bytes at a time:
+ * 16-Byte Page Write Buffer
+ */
+#define BYTES_PER_EEPROM_PAGE 16
+
+/*
+ * EEPROM_WRITE_DELAY_MS: the 24FC04H datasheet says it takes up to
+ * 5ms to complete a given write:
+ * Write Cycle Time (byte or page) ro Page Write Time 5 ms, Maximum
+ */
+#define EEPROM_WRITE_DELAY_MS 5000
+/*
+ * StarFive OUI. Registration Date is 20xx-xx-xx
+ */
+#define STARFIVE_OUI_PREFIX "6C:CF:39:"
+#define STARFIVE_DEFAULT_MAC0 "6C:CF:39:6C:DE:AD"
+#define STARFIVE_DEFAULT_MAC1 "6C:CF:39:6C:DE:AE"
+
+/* Magic number at the first four bytes of EEPROM HATs */
+#define STARFIVE_EEPROM_HATS_SIG "SFVF" /* StarFive VisionFive */
+
+#define STARFIVE_EEPROM_HATS_SIZE_MAX 256 /* Header + Atom1&4(v1) */
+#define STARFIVE_EEPROM_WP_OFFSET 0 /* Read only field */
+#define STARFIVE_EEPROM_ATOM1_PSTR "VF7110A1-2228-D008E000-00000001\0"
+#define STARFIVE_EEPROM_ATOM1_PSTR_SIZE 32
+#define STARFIVE_EEPROM_ATOM1_SN_OFFSET 23
+#define STARFIVE_EEPROM_ATOM1_VSTR "StarFive Technology Co., Ltd.\0\0\0"
+#define STARFIVE_EEPROM_ATOM1_VSTR_SIZE 32
+
+#define MAGIC_NUMBER_BYTES 4
+#define MAC_ADDR_BYTES 6
+#define MAC_ADDR_STRLEN 17
+
+/*
+ * Atom Types
+ * 0x0000 = invalid
+ * 0x0001 = vendor info
+ * 0x0002 = GPIO map
+ * 0x0003 = Linux device tree blob
+ * 0x0004 = manufacturer custom data
+ * 0x0005-0xfffe = reserved for future use
+ * 0xffff = invalid
+ */
+
+#define HATS_ATOM_INVALID 0x0000
+#define HATS_ATOM_VENDOR 0x0001
+#define HATS_ATOM_GPIO 0x0002
+#define HATS_ATOM_DTB 0x0003
+#define HATS_ATOM_CUSTOM 0x0004
+#define HATS_ATOM_INVALID_END 0xffff
+
+struct eeprom_header {
+ char signature[MAGIC_NUMBER_BYTES]; /* ASCII table signature */
+ u8 version; /* EEPROM data format version */
+ /* (0x00 reserved, 0x01 = first version) */
+ u8 reversed; /* 0x00, Reserved field */
+ u16 numatoms; /* total atoms in EEPROM */
+ u32 eeplen; /* total length in bytes of all eeprom data */
+ /* (including this header) */
+};
+
+struct eeprom_atom_header {
+ u16 type;
+ u16 count;
+ u32 dlen;
+};
+
+struct eeprom_atom1_data {
+ u8 uuid[16];
+ u16 pid;
+ u16 pver;
+ u8 vslen;
+ u8 pslen;
+ uchar vstr[STARFIVE_EEPROM_ATOM1_VSTR_SIZE];
+ uchar pstr[STARFIVE_EEPROM_ATOM1_PSTR_SIZE]; /* product SN */
+};
+
+struct starfive_eeprom_atom1 {
+ struct eeprom_atom_header header;
+ struct eeprom_atom1_data data;
+ u16 crc;
+};
+
+struct eeprom_atom4_data {
+ u16 version;
+ u8 pcb_revision; /* PCB version */
+ u8 bom_revision; /* BOM version */
+ u8 mac0_addr[MAC_ADDR_BYTES]; /* Ethernet0 MAC */
+ u8 mac1_addr[MAC_ADDR_BYTES]; /* Ethernet1 MAC */
+ u8 reserved[2];
+};
+
+struct starfive_eeprom_atom4 {
+ struct eeprom_atom_header header;
+ struct eeprom_atom4_data data;
+ u16 crc;
+};
+
+struct starfive_eeprom {
+ struct eeprom_header header;
+ struct starfive_eeprom_atom1 atom1;
+ struct starfive_eeprom_atom4 atom4;
+};
+
+static union {
+ struct starfive_eeprom eeprom;
+ uchar buf[STARFIVE_EEPROM_HATS_SIZE_MAX];
+} pbuf __section(".data");
+
+/* Set to 1 if we've read EEPROM into memory */
+static int has_been_read __section(".data");
+
+static inline int is_match_magic(void)
+{
+ return strncmp(pbuf.eeprom.header.signature, STARFIVE_EEPROM_HATS_SIG,
+ MAGIC_NUMBER_BYTES);
+}
+
+/* Calculate the current CRC */
+static inline u32 calculate_crc16(struct eeprom_atom_header *head)
+{
+ uint len = sizeof(struct eeprom_atom_header) + head->dlen - sizeof(u16);
+
+ return crc16(0, (void *)head, len);
+}
+
+/* This function should be called after each update to the EEPROM structure */
+static inline void update_crc(void)
+{
+ pbuf.eeprom.atom1.crc = calculate_crc16(&pbuf.eeprom.atom1.header);
+ pbuf.eeprom.atom4.crc = calculate_crc16(&pbuf.eeprom.atom4.header);
+}
+
+static void dump_raw_eeprom(void)
+{
+ unsigned int i;
+ u32 len;
+
+ len = sizeof(struct starfive_eeprom);
+ for (i = 0; i < len; i++) {
+ if ((i % 16) == 0)
+ printf("%02X: ", i);
+ printf("%02X ", ((u8 *)pbuf.buf)[i]);
+ if (((i % 16) == 15) || (i == len - 1))
+ printf("\n");
+ }
+}
+
+/**
+ * show_eeprom - display the contents of the EEPROM
+ */
+static void show_eeprom(void)
+{
+ if (has_been_read != 1)
+ return;
+
+ printf("\n--------EEPROM INFO--------\n");
+ printf("Vendor : %s\n", pbuf.eeprom.atom1.data.vstr);
+ printf("Product full SN: %s\n", pbuf.eeprom.atom1.data.pstr);
+ printf("data version: 0x%x\n", pbuf.eeprom.atom4.data.version);
+ if (pbuf.eeprom.atom4.data.version == 2) {
+ printf("PCB revision: 0x%x\n", pbuf.eeprom.atom4.data.pcb_revision);
+ printf("BOM revision: %c\n", pbuf.eeprom.atom4.data.bom_revision);
+ printf("Ethernet MAC0 address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ pbuf.eeprom.atom4.data.mac0_addr[0], pbuf.eeprom.atom4.data.mac0_addr[1],
+ pbuf.eeprom.atom4.data.mac0_addr[2], pbuf.eeprom.atom4.data.mac0_addr[3],
+ pbuf.eeprom.atom4.data.mac0_addr[4], pbuf.eeprom.atom4.data.mac0_addr[5]);
+ printf("Ethernet MAC1 address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ pbuf.eeprom.atom4.data.mac1_addr[0], pbuf.eeprom.atom4.data.mac1_addr[1],
+ pbuf.eeprom.atom4.data.mac1_addr[2], pbuf.eeprom.atom4.data.mac1_addr[3],
+ pbuf.eeprom.atom4.data.mac1_addr[4], pbuf.eeprom.atom4.data.mac1_addr[5]);
+ } else {
+ printf("Custom data v%d is not Supported\n", pbuf.eeprom.atom4.data.version);
+ }
+ printf("--------EEPROM INFO--------\n\n");
+}
+
+/**
+ * set_mac_address() - stores a MAC address into the local EEPROM copy
+ *
+ * This function takes a pointer to MAC address string
+ * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number),
+ * stores it in the MAC address field of the EEPROM local copy, and
+ * updates the local copy of the CRC.
+ */
+static void set_mac_address(char *string, int index)
+{
+ u8 i;
+ u8 *mac;
+
+ if (strncasecmp(STARFIVE_OUI_PREFIX, string,
+ strlen(STARFIVE_OUI_PREFIX))) {
+ printf("The MAC address doesn't match StarFive OUI %s\n",
+ STARFIVE_OUI_PREFIX);
+ return;
+ }
+ mac = (index == 0) ? pbuf.eeprom.atom4.data.mac0_addr :
+ pbuf.eeprom.atom4.data.mac1_addr;
+
+ for (i = 0; *string && (i < MAC_ADDR_BYTES); i++) {
+ mac[i] = hextoul(string, &string);
+
+ if (*string == ':')
+ string++;
+ }
+
+ update_crc();
+}
+
+/**
+ * init_local_copy() - initialize the in-memory EEPROM copy
+ *
+ * Initialize the in-memory EEPROM copy with the magic number. Must
+ * be done when preparing to initialize a blank EEPROM, or overwrite
+ * one with a corrupted magic number.
+ */
+static void init_local_copy(void)
+{
+ memset((void *)pbuf.buf, 0, sizeof(struct starfive_eeprom));
+ memcpy(pbuf.eeprom.header.signature, STARFIVE_EEPROM_HATS_SIG,
+ strlen(STARFIVE_EEPROM_HATS_SIG));
+ pbuf.eeprom.header.version = FORMAT_VERSION;
+ pbuf.eeprom.header.numatoms = 2;
+ pbuf.eeprom.header.eeplen = sizeof(struct starfive_eeprom);
+
+ pbuf.eeprom.atom1.header.type = HATS_ATOM_VENDOR;
+ pbuf.eeprom.atom1.header.count = 1;
+ pbuf.eeprom.atom1.header.dlen = sizeof(struct eeprom_atom1_data) + sizeof(u16);
+ pbuf.eeprom.atom1.data.vslen = STARFIVE_EEPROM_ATOM1_VSTR_SIZE;
+ pbuf.eeprom.atom1.data.pslen = STARFIVE_EEPROM_ATOM1_PSTR_SIZE;
+ memcpy(pbuf.eeprom.atom1.data.vstr, STARFIVE_EEPROM_ATOM1_VSTR,
+ strlen(STARFIVE_EEPROM_ATOM1_VSTR));
+ memcpy(pbuf.eeprom.atom1.data.pstr, STARFIVE_EEPROM_ATOM1_PSTR,
+ strlen(STARFIVE_EEPROM_ATOM1_PSTR));
+
+ pbuf.eeprom.atom4.header.type = HATS_ATOM_CUSTOM;
+ pbuf.eeprom.atom4.header.count = 2;
+ pbuf.eeprom.atom4.header.dlen = sizeof(struct eeprom_atom4_data) + sizeof(u16);
+ pbuf.eeprom.atom4.data.version = FORMAT_VERSION;
+ pbuf.eeprom.atom4.data.pcb_revision = PCB_VERSION;
+ pbuf.eeprom.atom4.data.bom_revision = BOM_VERSION;
+ set_mac_address(STARFIVE_DEFAULT_MAC0, 0);
+ set_mac_address(STARFIVE_DEFAULT_MAC1, 1);
+}
+
+/**
+ * prog_eeprom() - write the EEPROM from memory
+ */
+static int prog_eeprom(unsigned int size)
+{
+ unsigned int i;
+ void *p;
+ uchar tmp_buff[STARFIVE_EEPROM_HATS_SIZE_MAX];
+ struct udevice *dev;
+ int ret;
+
+ if (is_match_magic()) {
+ printf("MAGIC ERROR, Please check the data@%p.\n", pbuf.buf);
+ return -1;
+ }
+
+ ret = i2c_get_chip_for_busnum(CONFIG_SYS_EEPROM_BUS_NUM,
+ CONFIG_SYS_I2C_EEPROM_ADDR,
+ CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
+ &dev);
+ if (ret) {
+ printf("Get i2c bus:%d addr:%d fail.\n", CONFIG_SYS_EEPROM_BUS_NUM,
+ CONFIG_SYS_I2C_EEPROM_ADDR);
+ return ret;
+ }
+
+ for (i = 0, p = (u8 *)pbuf.buf; i < size; ) {
+ if (!ret)
+ ret = dm_i2c_write(dev, i, p, min((int)(size - i),
+ BYTES_PER_EEPROM_PAGE));
+ if (ret)
+ break;
+
+ udelay(EEPROM_WRITE_DELAY_MS);
+ i += BYTES_PER_EEPROM_PAGE;
+ p += BYTES_PER_EEPROM_PAGE;
+ }
+
+ if (!ret) {
+ /* Verify the write by reading back the EEPROM and comparing */
+ ret = dm_i2c_read(dev,
+ STARFIVE_EEPROM_WP_OFFSET,
+ tmp_buff,
+ STARFIVE_EEPROM_HATS_SIZE_MAX);
+ if (!ret && memcmp((void *)pbuf.buf, (void *)tmp_buff,
+ STARFIVE_EEPROM_HATS_SIZE_MAX))
+ ret = -1;
+ }
+
+ if (ret) {
+ has_been_read = -1;
+ printf("Programming failed.\n");
+ return -1;
+ }
+
+ printf("Programming passed.\n");
+ return 0;
+}
+
+/**
+ * read_eeprom() - read the EEPROM into memory, if it hasn't been read already
+ */
+static int read_eeprom(void)
+{
+ int ret;
+ struct udevice *dev;
+
+ if (has_been_read == 1)
+ return 0;
+
+ ret = i2c_get_chip_for_busnum(CONFIG_SYS_EEPROM_BUS_NUM,
+ CONFIG_SYS_I2C_EEPROM_ADDR, 1, &dev);
+ if (!ret)
+ ret = dm_i2c_read(dev, 0, (u8 *)pbuf.buf,
+ STARFIVE_EEPROM_HATS_SIZE_MAX);
+
+ has_been_read = (ret == 0) ? 1 : 0;
+
+ return ret;
+}
+
+/**
+ * set_pcb_revision() - stores a StarFive PCB revision into the local EEPROM copy
+ *
+ * Takes a pointer to a string representing the numeric PCB revision in
+ * decimal ("0" - "255"), stores it in the pcb_revision field of the
+ * EEPROM local copy, and updates the CRC of the local copy.
+ */
+static void set_pcb_revision(char *string)
+{
+ u32 p;
+
+ p = simple_strtoul(string, &string, 16);
+ if (p > U8_MAX) {
+ printf("%s must not be greater than %d\n", "PCB revision",
+ U8_MAX);
+ return;
+ }
+
+ pbuf.eeprom.atom4.data.pcb_revision = p;
+
+ update_crc();
+}
+
+/**
+ * set_bom_revision() - stores a StarFive BOM revision into the local EEPROM copy
+ *
+ * Takes a pointer to a uppercase ASCII character representing the BOM
+ * revision ("A" - "Z"), stores it in the bom_revision field of the
+ * EEPROM local copy, and updates the CRC of the local copy.
+ */
+static void set_bom_revision(char *string)
+{
+ if (string[0] < 'A' || string[0] > 'Z') {
+ printf("BOM revision must be an uppercase letter between A and Z\n");
+ return;
+ }
+
+ pbuf.eeprom.atom4.data.bom_revision = string[0];
+
+ update_crc();
+}
+
+/**
+ * set_product_id() - stores a StarFive product ID into the local EEPROM copy
+ *
+ * Takes a pointer to a string representing the numeric product ID in
+ * string ("VF7100A1-2150-D008E000-00000001\0"), stores it in the product string
+ * field of the EEPROM local copy, and updates the CRC of the local copy.
+ */
+static void set_product_id(char *string)
+{
+ u32 len;
+
+ len = (strlen(string) > STARFIVE_EEPROM_ATOM1_PSTR_SIZE) ?
+ STARFIVE_EEPROM_ATOM1_PSTR_SIZE : strlen(string);
+
+ memcpy((void *)pbuf.eeprom.atom1.data.pstr, (void *)string, len);
+
+ update_crc();
+}
+
+static int print_usage(void)
+{
+ printf("display and program the system ID and MAC addresses in EEPROM\n"
+ "[read_eeprom|initialize|write_eeprom|mac_address|pcb_revision|bom_revision|product_id]\n"
+ "mac read_eeprom\n"
+ " - read EEPROM content into memory data structure\n"
+ "mac write_eeprom\n"
+ " - save memory data structure to the EEPROM\n"
+ "mac initialize\n"
+ " - initialize the in-memory EEPROM copy with default data\n"
+ "mac mac0_address <xx:xx:xx:xx:xx:xx>\n"
+ " - stores a MAC0 address into the local EEPROM copy\n"
+ "mac mac1_address <xx:xx:xx:xx:xx:xx>\n"
+ " - stores a MAC1 address into the local EEPROM copy\n"
+ "mac pcb_revision <?>\n"
+ " - stores a StarFive PCB revision into the local EEPROM copy\n"
+ "mac bom_revision <A>\n"
+ " - stores a StarFive BOM revision into the local EEPROM copy\n"
+ "mac product_id <VF7110A1-2228-D008E000-xxxxxxxx>\n"
+ " - stores a StarFive product ID into the local EEPROM copy\n");
+ return 0;
+}
+
+int do_mac(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+ char *cmd;
+
+ if (argc == 1) {
+ show_eeprom();
+ return 0;
+ }
+
+ if (argc > 3)
+ return print_usage();
+
+ cmd = argv[1];
+
+ /* Commands with no argument */
+ if (!strcmp(cmd, "read_eeprom")) {
+ has_been_read = 0;
+ return read_eeprom();
+ } else if (!strcmp(cmd, "initialize")) {
+ init_local_copy();
+ return 0;
+ } else if (!strcmp(cmd, "write_eeprom")) {
+ return prog_eeprom(STARFIVE_EEPROM_HATS_SIZE_MAX);
+ }
+
+ if (argc != 3)
+ return print_usage();
+
+ if (is_match_magic()) {
+ printf("Please read the EEPROM ('read_eeprom') and/or initialize the EEPROM ('initialize') first.\n");
+ return 0;
+ }
+
+ if (!strcmp(cmd, "mac0_address")) {
+ set_mac_address(argv[2], 0);
+ return 0;
+ } else if (!strcmp(cmd, "mac1_address")) {
+ set_mac_address(argv[2], 1);
+ return 0;
+ } else if (!strcmp(cmd, "pcb_revision")) {
+ set_pcb_revision(argv[2]);
+ return 0;
+ } else if (!strcmp(cmd, "bom_revision")) {
+ set_bom_revision(argv[2]);
+ return 0;
+ } else if (!strcmp(cmd, "product_id")) {
+ set_product_id(argv[2]);
+ return 0;
+ }
+
+ return print_usage();
+}
+
+/**
+ * mac_read_from_eeprom() - read the MAC address & the serial number in EEPROM
+ *
+ * This function reads the MAC address and the serial number 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.
+ *
+ * If CONFIG_ID_EEPROM is enabled, this function will be called in
+ * "static init_fnc_t init_sequence_r[]" of u-boot/common/board_r.c.
+ */
+int mac_read_from_eeprom(void)
+{
+ /**
+ * try to fill the buff from EEPROM,
+ * always return SUCCESS, even some error happens.
+ */
+ if (read_eeprom()) {
+ dump_raw_eeprom();
+ return 0;
+ }
+
+ // 1, setup ethaddr env
+ eth_env_set_enetaddr("eth0addr", pbuf.eeprom.atom4.data.mac0_addr);
+ eth_env_set_enetaddr("eth1addr", pbuf.eeprom.atom4.data.mac1_addr);
+
+ /**
+ * 2, setup serial# env, reference to hifive-platform-i2c-eeprom.c,
+ * serial# can be a ASCII string, but not just a hex number, so we
+ * setup serial# in the 32Byte format:
+ * "VF7100A1-2201-D008E000-00000001;"
+ * "<product>-<date>-<DDR&eMMC>-<serial_number>"
+ * <date>: 4Byte, should be the output of `date +%y%W`
+ * <DDR&eMMC>: 8Byte, "D008" means 8GB, "D01T" means 1TB;
+ * "E000" means no eMMC，"E032" means 32GB, "E01T" means 1TB.
+ * <serial_number>: 8Byte, the Unique Identifier of board in hex.
+ */
+ if (!env_get("serial#"))
+ env_set("serial#", pbuf.eeprom.atom1.data.pstr);
+
+ printf("StarFive EEPROM format v%u\n", pbuf.eeprom.header.version);
+ show_eeprom();
+ return 0;
+}
+
+/**
+ * get_pcb_revision_from_eeprom - get the PCB revision
+ *
+ * 1.2A return 'A'/'a', 1.3B return 'B'/'b',other values are illegal
+ */
+u8 get_pcb_revision_from_eeprom(void)
+{
+ u8 pv = 0xFF;
+
+ if (read_eeprom())
+ return pv;
+
+ return pbuf.eeprom.atom1.data.pstr[6];
+}
+
+/**
+ * get_ddr_size_from_eeprom - get the DDR size
+ * pstr: VF7110A1-2228-D008E000-00000001
+ * VF7110A1/VF7110B1 : VisionFive JH7110A /VisionFive JH7110B
+ * D008: 8GB LPDDR4
+ * E000: No emmc device, ECxx: include emmc device, xx: Capacity size[GB]
+ * return: the field of 'D008E000'
+ */
+
+u32 get_ddr_size_from_eeprom(void)
+{
+ u32 pv = 0xFFFFFFFF;
+
+ if (read_eeprom())
+ return pv;
+
+ return hextoul(&pbuf.eeprom.atom1.data.pstr[14], NULL);
+}