1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2015 Infineon Technologies AG
4 * Copyright (C) 2016 STMicroelectronics SAS
5 */
6
7#ifndef TPM_TIS_SPI_H
8#define TPM_TIS_SPI_H
9
10#include "tpm_tis_core.h"
11
12struct tpm_tis_spi_phy {
13	struct tpm_tis_data priv;
14	struct spi_device *spi_device;
15	int (*flow_control)(struct tpm_tis_spi_phy *phy,
16			     struct spi_transfer *xfer);
17	struct completion ready;
18	unsigned long wake_after;
19
20	u8 *iobuf;
21};
22
23static inline struct tpm_tis_spi_phy *to_tpm_tis_spi_phy(struct tpm_tis_data *data)
24{
25	return container_of(data, struct tpm_tis_spi_phy, priv);
26}
27
28extern int tpm_tis_spi_init(struct spi_device *spi, struct tpm_tis_spi_phy *phy,
29			    int irq, const struct tpm_tis_phy_ops *phy_ops);
30
31extern int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
32				u8 *in, const u8 *out);
33
34extern int tpm_tis_spi_read16(struct tpm_tis_data *data, u32 addr, u16 *result);
35extern int tpm_tis_spi_read32(struct tpm_tis_data *data, u32 addr, u32 *result);
36extern int tpm_tis_spi_write32(struct tpm_tis_data *data, u32 addr, u32 value);
37
38#ifdef CONFIG_TCG_TIS_SPI_CR50
39extern int cr50_spi_probe(struct spi_device *spi);
40#else
41static inline int cr50_spi_probe(struct spi_device *spi)
42{
43	return -ENODEV;
44}
45#endif
46
47#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_TCG_TIS_SPI_CR50)
48extern int tpm_tis_spi_resume(struct device *dev);
49#else
50#define tpm_tis_spi_resume	NULL
51#endif
52
53#endif
54