tpm: Move platform specific definitions to the new PTP header

These are definitions for TPM 2.0 interface and interactions with
the platform as defined in the TCG specification:

These definitions are located here in a separate file to avoid conflicts
with vendor specific TIS/FIFO definition (e.g. STMicroelectronics,
Infineon Technologies, etc). This allows the TCG defined TIS/FIFO
interface to be in a public header while the former chip specific
implementations contain their own definitions. TPM 1.x family chips
that adhere to the TCG specifications use the TIS/FIFO interface as
defined here.

TCG PC Client Platform TPM Profile (PTP) Specification
 - https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/

Co-developed-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Signed-off-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Co-developed-by: Alec Brown <alec.r.brown@oracle.com>
Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Signed-off-by: Ross Philipson <ross.philipson@gmail.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

1 files changed, 133 insertions, 0 deletions

diff --git a/include/linux/tpm_ptp.h b/include/linux/tpm_ptp.h
new file mode 100644
index 000000000000..e80ed810a269
--- /dev/null
+++ b/include/linux/tpm_ptp.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Following copyright information was take from the original file
+ * <drivers/char/tpm/tpm_tis_core.h> where the definitions were moved
+ * from:
+ *
+ * Copyright (C) 2005, 2006 IBM Corporation
+ * Copyright (C) 2014, 2015 Intel Corporation
+ *
+ * Authors:
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * Device driver for TCG/TCPA TPM (trusted platform module).
+ * Specifications at www.trustedcomputinggroup.org
+ *
+ * This device driver implements the TPM interface as defined in
+ * the TCG TPM Interface Spec version 1.2, revision 1.0.
+ */
+
+#ifndef __LINUX_TPM_PTP_H__
+#define __LINUX_TPM_PTP_H__
+
+/*
+ * TCG PC Client Platform TPM Profile (PTP) Specification
+ * https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
+ */
+
+/* TIS/FIFO macros and definitions */
+
+enum tis_access {
+	TPM_ACCESS_VALID		= 0x80,
+	TPM_ACCESS_ACTIVE_LOCALITY	= 0x20,	/* (R) */
+	TPM_ACCESS_RELINQUISH_LOCALITY	= 0x20, /* (W) */
+	TPM_ACCESS_REQUEST_PENDING	= 0x04,	/* (W) */
+	TPM_ACCESS_REQUEST_USE		= 0x02,	/* (W) */
+};
+
+enum tis_status {
+	TPM_STS_VALID		= 0x80, /* (R) */
+	TPM_STS_COMMAND_READY	= 0x40, /* (R) */
+	TPM_STS_DATA_AVAIL	= 0x10, /* (R) */
+	TPM_STS_DATA_EXPECT	= 0x08, /* (R) */
+	TPM_STS_GO		= 0x20, /* (W) */
+	TPM_STS_RESPONSE_RETRY	= 0x02, /* (R) */
+	TPM_STS_READ_ZERO	= 0x23, /* bits that must be zero on read */
+};
+
+enum tis_int_flags {
+	TPM_GLOBAL_INT_ENABLE		= 0x80000000,
+	TPM_INTF_BURST_COUNT_STATIC	= 0x100,
+	TPM_INTF_CMD_READY_INT		= 0x080,
+	TPM_INTF_INT_EDGE_FALLING	= 0x040,
+	TPM_INTF_INT_EDGE_RISING	= 0x020,
+	TPM_INTF_INT_LEVEL_LOW		= 0x010,
+	TPM_INTF_INT_LEVEL_HIGH		= 0x008,
+	TPM_INTF_LOCALITY_CHANGE_INT	= 0x004,
+	TPM_INTF_STS_VALID_INT		= 0x002,
+	TPM_INTF_DATA_AVAIL_INT		= 0x001,
+};
+
+enum tis_defaults {
+	TIS_MEM_LEN		= 0x5000,
+	TIS_SHORT_TIMEOUT	= 750,   /* ms */
+	TIS_LONG_TIMEOUT	= 4000,  /* 4 secs */
+	TIS_TIMEOUT_MIN_ATML	= 14700, /* usecs */
+	TIS_TIMEOUT_MAX_ATML	= 15000, /* usecs */
+};
+
+#define TIS_MEM_X86_LPC_BASE		0xFED40000
+#define INTEL_LEGACY_BLK_BASE_ADDR	0xFED08000
+
+enum tis_x86_defaults {
+	TIS_MEM_X86_LEN			= 0x5000,
+	ILB_REMAP_SIZE			= 0x100,
+	LPC_CNTRL_OFFSET		= 0x84,
+	LPC_CLKRUN_EN			= (1 << 2),
+};
+
+/*
+ * Some timeout values are needed before it is known whether the chip is
+ * TPM 1.0 or TPM 2.0.
+ */
+#define TIS_TIMEOUT_A_MAX	max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_A)
+#define TIS_TIMEOUT_B_MAX	max_t(int, TIS_LONG_TIMEOUT, TPM2_TIMEOUT_B)
+#define TIS_TIMEOUT_C_MAX	max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_C)
+#define TIS_TIMEOUT_D_MAX	max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_D)
+
+#define	TPM_ACCESS(l)			(0x0000 | ((l) << 12))
+#define	TPM_INT_ENABLE(l)		(0x0008 | ((l) << 12))
+#define	TPM_INT_VECTOR(l)		(0x000C | ((l) << 12))
+#define	TPM_INT_STATUS(l)		(0x0010 | ((l) << 12))
+#define	TPM_INTF_CAPS(l)		(0x0014 | ((l) << 12))
+#define	TPM_STS(l)			(0x0018 | ((l) << 12))
+#define	TPM_STS3(l)			(0x001b | ((l) << 12))
+#define	TPM_DATA_FIFO(l)		(0x0024 | ((l) << 12))
+#define	TPM_INTF_ID(l)			(0x0030 | ((l) << 12))
+
+#define	TPM_DID_VID(l)			(0x0F00 | ((l) << 12))
+#define	TPM_RID(l)			(0x0F04 | ((l) << 12))
+
+/* TPM HW Interface and Capabilities */
+#define TPM_TIS_INTF_ACTIVE		0x00
+#define TPM_CRB_INTF_ACTIVE		0x01
+
+#define TPM_INTID_INTERFACE_TYPE	GENMASK(3, 0)
+#define TPM_INTID_INTERFACE_VERSION	GENMASK(7, 4)
+#define TPM_INTID_CAP_LOCALITY		BIT(8)
+#define TPM_INTID_CAP_TIS		BIT(13)
+#define TPM_INTID_CAP_CRB		BIT(14)
+#define TPM_INTID_CAP_IF_RES		GENMASK(16, 15)
+#define TPM_INTID_INTERFACE_SELECTOR	GENMASK(18, 17)
+#define TPM_INTID_INTF_SEL_LOCK		BIT(19)
+
+#define TPM_TIS_INTF_12			0x00
+#define TPM_TIS_INTF_13			0x02
+#define TPM2_TIS_INTF_13		0x03
+
+#define TPM_INTF_DATA_AVAIL_INT_SUPPORT		BIT(0)
+#define TPM_INTF_STS_VALID_INT_SUPPORT		BIT(1)
+#define TPM_INTF_LOCALITY_CHANGE_INT_SUPPORT	BIT(2)
+#define TPM_INTF_INTERRUPT_LEVEL_HIGH		BIT(3)
+#define TPM_INTF_INTERRUPT_LEVEL_LOW		BIT(4)
+#define TPM_INTF_INTERRUPT_EDGE_RISING		BIT(5)
+#define TPM_INTF_INTERRUPT_EDGE_FALLING		BIT(6)
+#define TPM_INTF_COMMAND_READY_INT_SUPPORT	BIT(7)
+#define TPM_INTF_BURST_COUNT_STATIC		BIT(8)
+#define TPM_INTF_DATA_TRANSFER_SIZE_SUPPORT	GENMASK(10, 9)
+#define TPM_INTF_INTERFACE_VERSION		GENMASK(30, 28)
+
+#endif