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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 "tpm.h"
enum tis_access {
TPM_ACCESS_VALID = 0x80,
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
TPM_ACCESS_REQUEST_PENDING = 0x04,
TPM_ACCESS_REQUEST_USE = 0x02,
};
enum tis_status {
TPM_STS_VALID = 0x80,
TPM_STS_COMMAND_READY = 0x40,
TPM_STS_GO = 0x20,
TPM_STS_DATA_AVAIL = 0x10,
TPM_STS_DATA_EXPECT = 0x08,
};
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 = 2000, /* 2 sec */
};
/* 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_DID_VID(l) (0x0F00 | ((l) << 12))
#define TPM_RID(l) (0x0F04 | ((l) << 12))
#define LPC_CNTRL_OFFSET 0x84
#define LPC_CLKRUN_EN (1 << 2)
#define INTEL_LEGACY_BLK_BASE_ADDR 0xFED08000
#define ILB_REMAP_SIZE 0x100
enum tpm_tis_flags {
TPM_TIS_ITPM_WORKAROUND = BIT(0),
};
struct tpm_tis_data {
u16 manufacturer_id;
int locality;
int irq;
bool irq_tested;
unsigned int 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;
};
struct tpm_tis_phy_ops {
int (*read_bytes)(struct tpm_tis_data *data, u32 addr, u16 len,
u8 *result);
int (*write_bytes)(struct tpm_tis_data *data, u32 addr, u16 len,
const u8 *value);
int (*read16)(struct tpm_tis_data *data, u32 addr, u16 *result);
int (*read32)(struct tpm_tis_data *data, u32 addr, u32 *result);
int (*write32)(struct tpm_tis_data *data, u32 addr, u32 src);
};
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);
}
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);
}
static inline int tpm_tis_read16(struct tpm_tis_data *data, u32 addr,
u16 *result)
{
return data->phy_ops->read16(data, addr, result);
}
static inline int tpm_tis_read32(struct tpm_tis_data *data, u32 addr,
u32 *result)
{
return data->phy_ops->read32(data, addr, result);
}
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);
}
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);
}
static inline int tpm_tis_write32(struct tpm_tis_data *data, u32 addr,
u32 value)
{
return data->phy_ops->write32(data, addr, value);
}
static inline bool is_bsw(void)
{
#ifdef CONFIG_X86
return ((boot_cpu_data.x86_model == INTEL_FAM6_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);
#ifdef CONFIG_PM_SLEEP
int tpm_tis_resume(struct device *dev);
#endif
#endif
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