1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2005, 2006 IBM Corporation
4 * Copyright (C) 2014, 2015 Intel Corporation
7 * Leendert van Doorn <leendert@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
10 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
12 * Device driver for TCG/TCPA TPM (trusted platform module).
13 * Specifications at www.trustedcomputinggroup.org
15 * This device driver implements the TPM interface as defined in
16 * the TCG TPM Interface Spec version 1.2, revision 1.0.
19 #ifndef __TPM_TIS_CORE_H__
20 #define __TPM_TIS_CORE_H__
25 TPM_ACCESS_VALID
= 0x80,
26 TPM_ACCESS_ACTIVE_LOCALITY
= 0x20,
27 TPM_ACCESS_REQUEST_PENDING
= 0x04,
28 TPM_ACCESS_REQUEST_USE
= 0x02,
33 TPM_STS_COMMAND_READY
= 0x40,
35 TPM_STS_DATA_AVAIL
= 0x10,
36 TPM_STS_DATA_EXPECT
= 0x08,
40 TPM_GLOBAL_INT_ENABLE
= 0x80000000,
41 TPM_INTF_BURST_COUNT_STATIC
= 0x100,
42 TPM_INTF_CMD_READY_INT
= 0x080,
43 TPM_INTF_INT_EDGE_FALLING
= 0x040,
44 TPM_INTF_INT_EDGE_RISING
= 0x020,
45 TPM_INTF_INT_LEVEL_LOW
= 0x010,
46 TPM_INTF_INT_LEVEL_HIGH
= 0x008,
47 TPM_INTF_LOCALITY_CHANGE_INT
= 0x004,
48 TPM_INTF_STS_VALID_INT
= 0x002,
49 TPM_INTF_DATA_AVAIL_INT
= 0x001,
54 TIS_SHORT_TIMEOUT
= 750, /* ms */
55 TIS_LONG_TIMEOUT
= 2000, /* 2 sec */
58 /* Some timeout values are needed before it is known whether the chip is
61 #define TIS_TIMEOUT_A_MAX max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_A)
62 #define TIS_TIMEOUT_B_MAX max_t(int, TIS_LONG_TIMEOUT, TPM2_TIMEOUT_B)
63 #define TIS_TIMEOUT_C_MAX max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_C)
64 #define TIS_TIMEOUT_D_MAX max_t(int, TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_D)
66 #define TPM_ACCESS(l) (0x0000 | ((l) << 12))
67 #define TPM_INT_ENABLE(l) (0x0008 | ((l) << 12))
68 #define TPM_INT_VECTOR(l) (0x000C | ((l) << 12))
69 #define TPM_INT_STATUS(l) (0x0010 | ((l) << 12))
70 #define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12))
71 #define TPM_STS(l) (0x0018 | ((l) << 12))
72 #define TPM_STS3(l) (0x001b | ((l) << 12))
73 #define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12))
75 #define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
76 #define TPM_RID(l) (0x0F04 | ((l) << 12))
78 #define LPC_CNTRL_OFFSET 0x84
79 #define LPC_CLKRUN_EN (1 << 2)
80 #define INTEL_LEGACY_BLK_BASE_ADDR 0xFED08000
81 #define ILB_REMAP_SIZE 0x100
84 TPM_TIS_ITPM_WORKAROUND
= BIT(0),
93 void __iomem
*ilb_base_addr
;
95 wait_queue_head_t int_queue
;
96 wait_queue_head_t read_queue
;
97 const struct tpm_tis_phy_ops
*phy_ops
;
98 unsigned short rng_quality
;
101 struct tpm_tis_phy_ops
{
102 int (*read_bytes
)(struct tpm_tis_data
*data
, u32 addr
, u16 len
,
104 int (*write_bytes
)(struct tpm_tis_data
*data
, u32 addr
, u16 len
,
106 int (*read16
)(struct tpm_tis_data
*data
, u32 addr
, u16
*result
);
107 int (*read32
)(struct tpm_tis_data
*data
, u32 addr
, u32
*result
);
108 int (*write32
)(struct tpm_tis_data
*data
, u32 addr
, u32 src
);
111 static inline int tpm_tis_read_bytes(struct tpm_tis_data
*data
, u32 addr
,
114 return data
->phy_ops
->read_bytes(data
, addr
, len
, result
);
117 static inline int tpm_tis_read8(struct tpm_tis_data
*data
, u32 addr
, u8
*result
)
119 return data
->phy_ops
->read_bytes(data
, addr
, 1, result
);
122 static inline int tpm_tis_read16(struct tpm_tis_data
*data
, u32 addr
,
125 return data
->phy_ops
->read16(data
, addr
, result
);
128 static inline int tpm_tis_read32(struct tpm_tis_data
*data
, u32 addr
,
131 return data
->phy_ops
->read32(data
, addr
, result
);
134 static inline int tpm_tis_write_bytes(struct tpm_tis_data
*data
, u32 addr
,
135 u16 len
, const u8
*value
)
137 return data
->phy_ops
->write_bytes(data
, addr
, len
, value
);
140 static inline int tpm_tis_write8(struct tpm_tis_data
*data
, u32 addr
, u8 value
)
142 return data
->phy_ops
->write_bytes(data
, addr
, 1, &value
);
145 static inline int tpm_tis_write32(struct tpm_tis_data
*data
, u32 addr
,
148 return data
->phy_ops
->write32(data
, addr
, value
);
151 static inline bool is_bsw(void)
154 return ((boot_cpu_data
.x86_model
== INTEL_FAM6_ATOM_AIRMONT
) ? 1 : 0);
160 void tpm_tis_remove(struct tpm_chip
*chip
);
161 int tpm_tis_core_init(struct device
*dev
, struct tpm_tis_data
*priv
, int irq
,
162 const struct tpm_tis_phy_ops
*phy_ops
,
163 acpi_handle acpi_dev_handle
);
165 #ifdef CONFIG_PM_SLEEP
166 int tpm_tis_resume(struct device
*dev
);