cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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spi-fsl-lib.h (3192B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Freescale SPI/eSPI controller driver library.
      4 *
      5 * Maintainer: Kumar Gala
      6 *
      7 * Copyright 2010 Freescale Semiconductor, Inc.
      8 * Copyright (C) 2006 Polycom, Inc.
      9 *
     10 * CPM SPI and QE buffer descriptors mode support:
     11 * Copyright (c) 2009  MontaVista Software, Inc.
     12 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
     13 */
     14#ifndef __SPI_FSL_LIB_H__
     15#define __SPI_FSL_LIB_H__
     16
     17#include <asm/io.h>
     18
     19/* SPI/eSPI Controller driver's private data. */
     20struct mpc8xxx_spi {
     21	struct device *dev;
     22	void __iomem *reg_base;
     23
     24	/* rx & tx bufs from the spi_transfer */
     25	const void *tx;
     26	void *rx;
     27
     28	int subblock;
     29	struct spi_pram __iomem *pram;
     30#ifdef CONFIG_FSL_SOC
     31	struct cpm_buf_desc __iomem *tx_bd;
     32	struct cpm_buf_desc __iomem *rx_bd;
     33#endif
     34
     35	struct spi_transfer *xfer_in_progress;
     36
     37	/* dma addresses for CPM transfers */
     38	dma_addr_t tx_dma;
     39	dma_addr_t rx_dma;
     40	bool map_tx_dma;
     41	bool map_rx_dma;
     42
     43	dma_addr_t dma_dummy_tx;
     44	dma_addr_t dma_dummy_rx;
     45
     46	/* functions to deal with different sized buffers */
     47	void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
     48	u32(*get_tx) (struct mpc8xxx_spi *);
     49
     50	unsigned int count;
     51	unsigned int irq;
     52
     53	unsigned nsecs;		/* (clock cycle time)/2 */
     54
     55	u32 spibrg;		/* SPIBRG input clock */
     56	u32 rx_shift;		/* RX data reg shift when in qe mode */
     57	u32 tx_shift;		/* TX data reg shift when in qe mode */
     58
     59	unsigned int flags;
     60
     61#if IS_ENABLED(CONFIG_SPI_FSL_SPI)
     62	int type;
     63	int native_chipselects;
     64	u8 max_bits_per_word;
     65
     66	void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
     67			   int bits_per_word, int msb_first);
     68#endif
     69
     70	struct completion done;
     71};
     72
     73struct spi_mpc8xxx_cs {
     74	/* functions to deal with different sized buffers */
     75	void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
     76	u32 (*get_tx) (struct mpc8xxx_spi *);
     77	u32 rx_shift;		/* RX data reg shift when in qe mode */
     78	u32 tx_shift;		/* TX data reg shift when in qe mode */
     79	u32 hw_mode;		/* Holds HW mode register settings */
     80};
     81
     82static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
     83{
     84	iowrite32be(val, reg);
     85}
     86
     87static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
     88{
     89	return ioread32be(reg);
     90}
     91
     92struct mpc8xxx_spi_probe_info {
     93	struct fsl_spi_platform_data pdata;
     94	__be32 __iomem *immr_spi_cs;
     95};
     96
     97extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
     98extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
     99extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
    100extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
    101extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
    102extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
    103
    104extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
    105		struct fsl_spi_platform_data *pdata);
    106extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
    107		struct spi_transfer *t, unsigned int len);
    108extern const char *mpc8xxx_spi_strmode(unsigned int flags);
    109extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
    110		unsigned int irq);
    111extern int mpc8xxx_spi_remove(struct device *dev);
    112extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
    113
    114#endif /* __SPI_FSL_LIB_H__ */