1 files changed, 102 insertions, 0 deletions
diff --git a/board/solidrun/common/tlv_data.c b/board/solidrun/common/tlv_data.c
new file mode 100644
index 0000000..f08ac89
--- /dev/null
+++ b/board/solidrun/common/tlv_data.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 SolidRun
+ */
+
+#include <common.h>
+#include <tlv_eeprom.h>
+#include "tlv_data.h"
+
+#define SR_TLV_CODE_RAM_SIZE	0x81
+
+static void store_product_name(struct tlvinfo_tlv *tlv_entry,
+			       struct tlv_data *td)
+{
+	int len;
+	char *dest;
+
+	if (strlen(td->tlv_product_name[0]) == 0)
+		dest = td->tlv_product_name[0];
+	else if (strlen(td->tlv_product_name[1]) == 0)
+		dest = td->tlv_product_name[1];
+	else
+		return;
+
+	len = min_t(unsigned int, tlv_entry->length,
+		    sizeof(td->tlv_product_name[0]) - 1);
+	memcpy(dest, tlv_entry->value, len);
+}
+
+static void parse_tlv_vendor_ext(struct tlvinfo_tlv *tlv_entry,
+				 struct tlv_data *td)
+{
+	u8 *val = tlv_entry->value;
+	u32 pen; /* IANA Private Enterprise Numbers */
+
+	if (tlv_entry->length < 5) /* 4 bytes PEN + at least 1 byte type */
+		return;
+
+	/* PEN is big endian */
+	pen = (val[0] << 24) | (val[1] << 16) | (val[2] << 8) | val[3];
+	/* Not a real PEN */
+	if (pen != 0xffffffff)
+		return;
+
+	if (val[4] != SR_TLV_CODE_RAM_SIZE)
+		return;
+	if (tlv_entry->length != 6)
+		return;
+	td->ram_size = val[5];
+}
+
+static void parse_tlv_data(u8 *eeprom, struct tlvinfo_header *hdr,
+			   struct tlvinfo_tlv *entry, struct tlv_data *td)
+{
+	unsigned int tlv_offset, tlv_len;
+
+	tlv_offset = sizeof(struct tlvinfo_header);
+	tlv_len = sizeof(struct tlvinfo_header) + be16_to_cpu(hdr->totallen);
+	while (tlv_offset < tlv_len) {
+		entry = (struct tlvinfo_tlv *)&eeprom[tlv_offset];
+
+		switch (entry->type) {
+		case TLV_CODE_PRODUCT_NAME:
+			store_product_name(entry, td);
+			break;
+		case TLV_CODE_VENDOR_EXT:
+			parse_tlv_vendor_ext(entry, td);
+			break;
+		default:
+			break;
+		}
+
+		tlv_offset += sizeof(struct tlvinfo_tlv) + entry->length;
+	}
+}
+
+void read_tlv_data(struct tlv_data *td)
+{
+	u8 eeprom_data[TLV_TOTAL_LEN_MAX];
+	struct tlvinfo_header *tlv_hdr;
+	struct tlvinfo_tlv *tlv_entry;
+	int ret, i;
+
+	for (i = 0; i < 2; i++) {
+		ret = read_tlvinfo_tlv_eeprom(eeprom_data, &tlv_hdr,
+					      &tlv_entry, i);
+		if (ret < 0)
+			continue;
+		parse_tlv_data(eeprom_data, tlv_hdr, tlv_entry, td);
+	}
+}
+
+bool sr_product_is(const struct tlv_data *td, const char *product)
+{
+	/* Allow prefix sub-string match */
+	if (strncmp(td->tlv_product_name[0], product, strlen(product)) == 0)
+		return true;
+	if (strncmp(td->tlv_product_name[1], product, strlen(product)) == 0)
+		return true;
+
+	return false;
+}