LXR linux/drivers/char/tpm/tpm_tis

   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