drivers/vpd: Add VPD support

VPD reference: https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/README.md

Copy ChromeOS VPD driver to add support for VPD without CROMEOS.
Possible use case:
* Storing calibration data
* Storing MAC address
* Storing serial
* Storing boot options

+ Now it's possible to define the VPD space by choosing
  one of the following enums: VPD_ANY, VPD_RW, VPD_RO.
+ CHROMEOS selects now VPD as part of it.
+ VPD is implemented as driver.

Change-Id: Id9263bd39bf25d024e93daa57053fefcb1adc53a
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/25046
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/vpd/vpd_tables.h

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Ported from mosys project (http://code.google.com/p/mosys/).
+ */
+
+#ifndef __LIB_VPD_TABLES_H__
+#define __LIB_VPD_TABLES_H__
+
+#include <compiler.h>
+#include <inttypes.h>
+
+#define VPD_ENTRY_MAGIC    "_SM_"
+#define VPD_INFO_MAGIC     \
+  "\xfe"      /* type: VPD header */       \
+  "\x09"      /* key length, 9 = 1 + 8 */  \
+  "\x01"      /* info version, 1 */        \
+  "gVpdInfo"  /* signature, 8 bytes */ \
+  "\x04"      /* value length */
+
+/* Google specific VPD info */
+struct google_vpd_info {
+  union {
+    struct {
+      uint8_t type;
+      uint8_t key_len;
+      uint8_t info_ver;
+      uint8_t signature[8];
+      uint8_t value_len;
+    } tlv;
+    uint8_t magic[12];
+  } header;
+  uint32_t size;
+} __packed;
+
+/* Entry */
+struct vpd_entry {
+  uint8_t anchor_string[4];
+  uint8_t entry_cksum;
+  uint8_t entry_length;
+  uint8_t major_ver;
+  uint8_t minor_ver;
+  uint16_t max_size;
+  uint8_t entry_rev;
+  uint8_t format_area[5];
+  uint8_t inter_anchor_string[5];
+  uint8_t inter_anchor_cksum;
+  uint16_t table_length;
+  uint32_t table_address;
+  uint16_t table_entry_count;
+  uint8_t bcd_revision;
+} __packed;
+
+/* Header */
+struct vpd_header {
+  uint8_t type;
+  uint8_t length;
+  uint16_t handle;
+} __packed;
+
+/* Type 0 - firmware information */
+struct vpd_table_firmware {
+  uint8_t vendor;
+  uint8_t version;
+  uint16_t start_address;
+  uint8_t release_date;
+  uint8_t rom_size_64k_blocks;
+  uint32_t characteristics;
+  uint8_t extension[2];  /* v2.4+ */
+  uint8_t major_ver;     /* v2.4+ */
+  uint8_t minor_ver;     /* v2.4+ */
+  uint8_t ec_major_ver;  /* v2.4+ */
+  uint8_t ec_minor_ver;  /* v2.4+ */
+} __packed;
+
+/* Type 1 - system information */
+struct vpd_table_system {
+  uint8_t manufacturer;
+  uint8_t name;
+  uint8_t version;
+  uint8_t serial_number;
+  uint8_t uuid[16];
+  uint8_t wakeup_type;
+  uint8_t sku_number;  /* v2.4+ */
+  uint8_t family;      /* v2.4+ */
+} __packed;
+
+/* Type 127 - end of table */
+struct vpd_table_eot {
+  struct vpd_header header;
+} __packed;
+
+/* Type 241 - binary blob pointer */
+struct vpd_table_binary_blob_pointer {
+  uint8_t struct_major_version;
+  uint8_t struct_minor_version;
+  uint8_t vendor;
+  uint8_t description;
+  uint8_t major_version;
+  uint8_t minor_version;
+  uint8_t variant;
+  uint8_t reserved[5];
+  uint8_t uuid[16];
+  uint32_t offset;
+  uint32_t size;
+} __packed;
+
+/* The length and number of strings defined here is not a limitation of VPD.
+ * These numbers were deemed good enough during development. */
+#define VPD_MAX_STRINGS 10
+#define VPD_MAX_STRING_LENGTH 64
+
+#endif /* __LIB_VPD_TABLES_H__ */