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https://github.com/brain-hackers/u-boot-brain
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Read RAM die capacity from the EEPROM TLV. Follow the ONIE standard that defines the Vendor Extension entry type for vendor specific data. We have no Private Enterprise Number at the moment as the standard requires. Use the dummy all 0xff value for now. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Stefan Roese <sr@denx.de>
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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