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