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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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 __TPM_TIS_CORE_H__
#define __TPM_TIS_CORE_H__
#include <linux/tpm_ptp.h>
#include "tpm.h"
enum tpm_tis_flags {
TPM_TIS_ITPM_WORKAROUND = 0,
TPM_TIS_INVALID_STATUS = 1,
TPM_TIS_DEFAULT_CANCELLATION = 2,
TPM_TIS_IRQ_TESTED = 3,
TPM_TIS_STATUS_VALID_RETRY = 4,
TPM_TIS_SETTLE_AFTER_RELINQUISH = 5,
};
struct tpm_tis_data {
struct tpm_chip *chip;
u32 did_vid;
struct mutex locality_count_mutex;
unsigned int locality_count;
int locality;
int irq;
struct work_struct free_irq_work;
unsigned long last_unhandled_irq;
unsigned int unhandled_irqs;
unsigned int int_mask;
unsigned long flags;
void __iomem *ilb_base_addr;
u16 clkrun_enabled;
wait_queue_head_t int_queue;
wait_queue_head_t read_queue;
const struct tpm_tis_phy_ops *phy_ops;
unsigned short rng_quality;
unsigned int timeout_min; /* usecs */
unsigned int timeout_max; /* usecs */
};
/*
* IO modes to indicate how many bytes should be read/written at once in the
* tpm_tis_phy_ops read_bytes/write_bytes calls. Use TPM_TIS_PHYS_8 to
* receive/transmit byte-wise, TPM_TIS_PHYS_16 for two bytes etc.
*/
enum tpm_tis_io_mode {
TPM_TIS_PHYS_8,
TPM_TIS_PHYS_16,
TPM_TIS_PHYS_32,
};
struct tpm_tis_phy_ops {
/* data is passed in little endian */
int (*read_bytes)(struct tpm_tis_data *data, u32 addr, u16 len,
u8 *result, enum tpm_tis_io_mode mode);
int (*write_bytes)(struct tpm_tis_data *data, u32 addr, u16 len,
const u8 *value, enum tpm_tis_io_mode mode);
int (*verify_crc)(struct tpm_tis_data *data, size_t len,
const u8 *value);
};
static inline int tpm_tis_read_bytes(struct tpm_tis_data *data, u32 addr,
u16 len, u8 *result)
{
return data->phy_ops->read_bytes(data, addr, len, result,
TPM_TIS_PHYS_8);
}
static inline int tpm_tis_read8(struct tpm_tis_data *data, u32 addr, u8 *result)
{
return data->phy_ops->read_bytes(data, addr, 1, result, TPM_TIS_PHYS_8);
}
static inline int tpm_tis_read16(struct tpm_tis_data *data, u32 addr,
u16 *result)
{
__le16 result_le;
int rc;
rc = data->phy_ops->read_bytes(data, addr, sizeof(u16),
(u8 *)&result_le, TPM_TIS_PHYS_16);
if (!rc)
*result = le16_to_cpu(result_le);
return rc;
}
static inline int tpm_tis_read32(struct tpm_tis_data *data, u32 addr,
u32 *result)
{
__le32 result_le;
int rc;
rc = data->phy_ops->read_bytes(data, addr, sizeof(u32),
(u8 *)&result_le, TPM_TIS_PHYS_32);
if (!rc)
*result = le32_to_cpu(result_le);
return rc;
}
static inline int tpm_tis_write_bytes(struct tpm_tis_data *data, u32 addr,
u16 len, const u8 *value)
{
return data->phy_ops->write_bytes(data, addr, len, value,
TPM_TIS_PHYS_8);
}
static inline int tpm_tis_write8(struct tpm_tis_data *data, u32 addr, u8 value)
{
return data->phy_ops->write_bytes(data, addr, 1, &value,
TPM_TIS_PHYS_8);
}
static inline int tpm_tis_write32(struct tpm_tis_data *data, u32 addr,
u32 value)
{
__le32 value_le;
int rc;
value_le = cpu_to_le32(value);
rc = data->phy_ops->write_bytes(data, addr, sizeof(u32),
(u8 *)&value_le, TPM_TIS_PHYS_32);
return rc;
}
static inline int tpm_tis_verify_crc(struct tpm_tis_data *data, size_t len,
const u8 *value)
{
if (!data->phy_ops->verify_crc)
return 0;
return data->phy_ops->verify_crc(data, len, value);
}
static inline bool is_bsw(void)
{
#ifdef CONFIG_X86
return (boot_cpu_data.x86_vfm == INTEL_ATOM_AIRMONT) ? 1 : 0;
#else
return false;
#endif
}
void tpm_tis_remove(struct tpm_chip *chip);
int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
const struct tpm_tis_phy_ops *phy_ops,
acpi_handle acpi_dev_handle);
int tpm_tis_resume(struct device *dev);
#endif
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