drivers/char/tpm/tpm_tis_spi.h

   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
  12 struct 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
  23 static 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
  28 extern 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
  31 extern int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
  32                                 u8 *in, const u8 *out);
  33
  34 extern int tpm_tis_spi_read16(struct tpm_tis_data *data, u32 addr, u16 *result);
  35 extern int tpm_tis_spi_read32(struct tpm_tis_data *data, u32 addr, u32 *result);
  36 extern int tpm_tis_spi_write32(struct tpm_tis_data *data, u32 addr, u32 value);
  37
  38 #ifdef CONFIG_TCG_TIS_SPI_CR50
  39 extern int cr50_spi_probe(struct spi_device *spi);
  40 #else
  41 static 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)
  48 extern int tpm_tis_spi_resume(struct device *dev);
  49 #else
  50 #define tpm_tis_spi_resume      NULL
  51 #endif
  52
  53 #endif