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