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+/* SPDX-License-Identifier: GPL-2.0+ */
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+/*
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+ * Copyright (c) 2013 The Chromium OS Authors.
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+ * Coypright (c) 2013 Guntermann & Drunck GmbH
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+ */
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+
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+#ifndef __TPM_API_H
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+#define __TPM_API_H
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+
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+#include <tpm-common.h>
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+#include <tpm-v1.h>
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+#include <tpm-v2.h>
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+
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+/**
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+ * Issue a TPM_Startup command.
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+ *
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+ * @param dev TPM device
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+ * @param mode TPM startup mode
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+ * @return return code of the operation
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+ */
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+u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode);
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+
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+/**
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+ * Issue a TPM_SelfTestFull command.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_self_test_full(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_ContinueSelfTest command.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_continue_self_test(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_NV_DefineSpace command. The implementation is limited
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+ * to specify TPM_NV_ATTRIBUTES and size of the area. The area index
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+ * could be one of the special value listed in enum tpm_nv_index.
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+ *
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+ * @param dev TPM device
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+ * @param index index of the area
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+ * @param perm TPM_NV_ATTRIBUTES of the area
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+ * @param size size of the area
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+ * @return return code of the operation
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+ */
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+u32 tpm_nv_define_space(struct udevice *dev, u32 index, u32 perm, u32 size);
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+
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+/**
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+ * Issue a TPM_NV_ReadValue command. This implementation is limited
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+ * to read the area from offset 0. The area index could be one of
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+ * the special value listed in enum tpm_nv_index.
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+ *
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+ * @param dev TPM device
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+ * @param index index of the area
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+ * @param data output buffer of the area contents
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+ * @param count size of output buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count);
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+
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+/**
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+ * Issue a TPM_NV_WriteValue command. This implementation is limited
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+ * to write the area from offset 0. The area index could be one of
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+ * the special value listed in enum tpm_nv_index.
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+ *
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+ * @param dev TPM device
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+ * @param index index of the area
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+ * @param data input buffer to be wrote to the area
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+ * @param length length of data bytes of input buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
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+ u32 length);
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+
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+/**
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+ * Issue a TPM_Extend command.
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+ *
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+ * @param dev TPM device
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+ * @param index index of the PCR
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+ * @param in_digest 160-bit value representing the event to be
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+ * recorded
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+ * @param out_digest 160-bit PCR value after execution of the
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+ * command
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+ * @return return code of the operation
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+ */
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+u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
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+ void *out_digest);
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+
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+/**
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+ * Issue a TPM_PCRRead command.
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+ *
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+ * @param dev TPM device
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+ * @param index index of the PCR
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+ * @param data output buffer for contents of the named PCR
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+ * @param count size of output buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count);
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+
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+/**
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+ * Issue a TSC_PhysicalPresence command. TPM physical presence flag
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+ * is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
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+ *
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+ * @param dev TPM device
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+ * @param presence TPM physical presence flag
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+ * @return return code of the operation
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+ */
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+u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence);
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+
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+/**
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+ * Issue a TPM_ReadPubek command.
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+ *
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+ * @param dev TPM device
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+ * @param data output buffer for the public endorsement key
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+ * @param count size of output buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count);
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+
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+/**
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+ * Issue a TPM_ForceClear command.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_force_clear(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_PhysicalEnable command.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_physical_enable(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_PhysicalDisable command.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_physical_disable(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_PhysicalSetDeactivated command.
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+ *
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+ * @param dev TPM device
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+ * @param state boolean state of the deactivated flag
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+ * @return return code of the operation
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+ */
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+u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state);
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+
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+/**
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+ * Issue a TPM_GetCapability command. This implementation is limited
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+ * to query sub_cap index that is 4-byte wide.
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+ *
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+ * @param dev TPM device
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+ * @param cap_area partition of capabilities
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+ * @param sub_cap further definition of capability, which is
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+ * limited to be 4-byte wide
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+ * @param cap output buffer for capability information
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+ * @param count size of output buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
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+ void *cap, size_t count);
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+
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+/**
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+ * Issue a TPM_FlushSpecific command for a AUTH resource.
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+ *
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+ * @param dev TPM device
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+ * @param auth_handle handle of the auth session
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+ * @return return code of the operation
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+ */
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+u32 tpm_terminate_auth_session(struct udevice *dev, u32 auth_handle);
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+
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+/**
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+ * Issue a TPM_OIAP command to setup an object independent authorization
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+ * session.
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+ * Information about the session is stored internally.
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+ * If there was already an OIAP session active it is terminated and a new
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+ * session is set up.
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+ *
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+ * @param dev TPM device
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+ * @param auth_handle pointer to the (new) auth handle or NULL.
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+ * @return return code of the operation
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+ */
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+u32 tpm_oiap(struct udevice *dev, u32 *auth_handle);
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+
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+/**
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+ * Ends an active OIAP session.
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation
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+ */
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+u32 tpm_end_oiap(struct udevice *dev);
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+
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+/**
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+ * Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
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+ * the usage of the parent key.
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+ *
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+ * @param dev TPM device
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+ * @param parent_handle handle of the parent key.
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+ * @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
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+ * @param key_length size of the key structure
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+ * @param parent_key_usage_auth usage auth for the parent key
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+ * @param key_handle pointer to the key handle
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+ * @return return code of the operation
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+ */
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+u32 tpm_load_key2_oiap(struct udevice *dev, u32 parent_handle, const void *key,
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+ size_t key_length, const void *parent_key_usage_auth,
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+ u32 *key_handle);
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+
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+/**
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+ * Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
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+ * authenticating the usage of the key.
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+ *
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+ * @param dev TPM device
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+ * @param key_handle handle of the key
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+ * @param usage_auth usage auth for the key
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+ * @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
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+ * should not be stored.
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+ * @param pubkey_len pointer to the pub key buffer len. On entry: the size of
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+ * the provided pubkey buffer. On successful exit: the size
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+ * of the stored TPM_PUBKEY structure (iff pubkey != NULL).
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+ * @return return code of the operation
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+ */
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+u32 tpm_get_pub_key_oiap(struct udevice *dev, u32 key_handle,
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+ const void *usage_auth, void *pubkey,
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+ size_t *pubkey_len);
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+
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+/**
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+ * Get the TPM permissions
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+ *
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+ * @param dev TPM device
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+ * @param perm Returns permissions value
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+ * @return return code of the operation
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+ */
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+u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm);
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+
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+/**
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+ * Flush a resource with a given handle and type from the TPM
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+ *
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+ * @param dev TPM device
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+ * @param key_handle handle of the resource
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+ * @param resource_type type of the resource
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+ * @return return code of the operation
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+ */
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+u32 tpm_flush_specific(struct udevice *dev, u32 key_handle, u32 resource_type);
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+
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+#ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
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+/**
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+ * Search for a key by usage AuthData and the hash of the parent's pub key.
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+ *
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+ * @param dev TPM device
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+ * @param auth Usage auth of the key to search for
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+ * @param pubkey_digest SHA1 hash of the pub key structure of the key
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+ * @param[out] handle The handle of the key (Non-null iff found)
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+ * @return 0 if key was found in TPM; != 0 if not.
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+ */
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+u32 tpm_find_key_sha1(struct udevice *dev, const u8 auth[20],
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+ const u8 pubkey_digest[20], u32 *handle);
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+#endif /* CONFIG_TPM_LOAD_KEY_BY_SHA1 */
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+
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+/**
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+ * Read random bytes from the TPM RNG. The implementation deals with the fact
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+ * that the TPM may legally return fewer bytes than requested by retrying
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+ * until @p count bytes have been received.
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+ *
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+ * @param dev TPM device
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+ * @param data output buffer for the random bytes
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+ * @param count size of output buffer
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+ * @return return code of the operation
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+ */
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+u32 tpm_get_random(struct udevice *dev, void *data, u32 count);
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+
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+/**
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+ * tpm_finalise_physical_presence() - Finalise physical presence
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation (0 = success)
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+ */
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+u32 tpm_finalise_physical_presence(struct udevice *dev);
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+
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+/**
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+ * tpm_nv_enable_locking() - lock the non-volatile space
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation (0 = success)
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+ */
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+u32 tpm_nv_enable_locking(struct udevice *dev);
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+
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+/**
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+ * tpm_set_global_lock() - set the global lock
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation (0 = success)
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+ */
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+u32 tpm_set_global_lock(struct udevice *dev);
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+
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+/**
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+ * tpm_write_lock() - lock the non-volatile space
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+ *
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+ * @param dev TPM device
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+ * @param index Index of space to lock
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+ * @return return code of the operation (0 = success)
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+ */
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+u32 tpm_write_lock(struct udevice *dev, u32 index);
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+
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+/**
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+ * tpm_resume() - start up the TPM from resume (after suspend)
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+ *
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+ * @param dev TPM device
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+ * @return return code of the operation (0 = success)
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+ */
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+u32 tpm_resume(struct udevice *dev);
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+
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+#endif /* __TPM_API_H */
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