86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "byteorder.h"
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#include "console.h"
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#include "extension.h"
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#include "link_defs.h"
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#include "util.h"
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#define CPRINTS(format, args...) cprints(CC_EXTENSION, format, ## args)
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uint32_t extension_route_command(struct vendor_cmd_params *p)
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{
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struct extension_command *cmd_p;
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struct extension_command *end_p;
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const char *why_ignore = "not found";
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#ifdef DEBUG_EXTENSION
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CPRINTS("%s(%d,%s) is=%d os=%d", __func__, p->code,
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p->flags & VENDOR_CMD_FROM_USB ? "USB" : "AP",
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p->in_size, p->out_size);
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#endif
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/* Filter commands from USB */
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if (p->flags & VENDOR_CMD_FROM_USB) {
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switch (p->code) {
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#ifdef CR50_DEV
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case VENDOR_CC_IMMEDIATE_RESET:
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case VENDOR_CC_INVALIDATE_INACTIVE_RW:
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case VENDOR_CC_SET_BOARD_ID:
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case VENDOR_CC_TPM_MODE:
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case VENDOR_CC_SN_SET_HASH:
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case VENDOR_CC_SN_INC_RMA:
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case VENDOR_CC_ENDORSEMENT_SEED:
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#endif /* defined(CR50_DEV) */
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case EXTENSION_POST_RESET: /* Always need to reset. */
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case VENDOR_CC_CCD:
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case VENDOR_CC_GET_BOARD_ID:
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case VENDOR_CC_RMA_CHALLENGE_RESPONSE:
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case VENDOR_CC_SPI_HASH: /* Requires physical presence. */
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case VENDOR_CC_TURN_UPDATE_ON:
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break;
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default:
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/* Otherwise, we don't allow this command. */
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why_ignore = "usb";
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goto ignore_cmd;
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}
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}
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#ifdef CONFIG_BOARD_ID_SUPPORT
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/*
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* If board ID is mismatched, allow only the commands needed to upgrade
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* Cr50 firmware.
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*/
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if (board_id_is_mismatched()) {
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switch (p->code) {
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case EXTENSION_FW_UPGRADE:
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case VENDOR_CC_REPORT_TPM_STATE:
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case VENDOR_CC_TURN_UPDATE_ON:
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case EXTENSION_POST_RESET:
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break;
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default:
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why_ignore = "BoardID mismatch";
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goto ignore_cmd;
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}
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}
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#endif
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/* Find the command handler */
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cmd_p = (struct extension_command *)&__extension_cmds;
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end_p = (struct extension_command *)&__extension_cmds_end;
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while (cmd_p != end_p) {
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if (cmd_p->command_code == p->code)
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return cmd_p->handler(p);
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cmd_p++;
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}
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ignore_cmd:
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/* Command not found or not allowed */
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CPRINTS("%s: ignore %d: %s", __func__, p->code, why_ignore);
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p->out_size = 0;
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return VENDOR_RC_NO_SUCH_COMMAND;
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}
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