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/*
* Freescale SPI/eSPI controller driver library.
*
* Maintainer: Kumar Gala
*
* Copyright 2010 Freescale Semiconductor, Inc.
* Copyright (C) 2006 Polycom, Inc.
*
* CPM SPI and QE buffer descriptors mode support:
* Copyright (c) 2009 MontaVista Software, Inc.
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef __SPI_FSL_LIB_H__
#define __SPI_FSL_LIB_H__
#include <asm/io.h>
/* SPI/eSPI Controller driver's private data. */
struct mpc8xxx_spi {
struct device *dev;
void *reg_base;
/* rx & tx bufs from the spi_transfer */
const void *tx;
void *rx;
#if IS_ENABLED(CONFIG_SPI_FSL_ESPI)
int len;
#endif
int subblock;
struct spi_pram __iomem *pram;
#ifdef CONFIG_FSL_SOC
struct cpm_buf_desc __iomem *tx_bd;
struct cpm_buf_desc __iomem *rx_bd;
#endif
struct spi_transfer *xfer_in_progress;
/* dma addresses for CPM transfers */
dma_addr_t tx_dma;
dma_addr_t rx_dma;
bool map_tx_dma;
bool map_rx_dma;
dma_addr_t dma_dummy_tx;
dma_addr_t dma_dummy_rx;
/* functions to deal with different sized buffers */
void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
u32(*get_tx) (struct mpc8xxx_spi *);
/* hooks for different controller driver */
void (*spi_remove) (struct mpc8xxx_spi *mspi);
unsigned int count;
unsigned int irq;
unsigned nsecs; /* (clock cycle time)/2 */
u32 spibrg; /* SPIBRG input clock */
u32 rx_shift; /* RX data reg shift when in qe mode */
u32 tx_shift; /* TX data reg shift when in qe mode */
unsigned int flags;
#if IS_ENABLED(CONFIG_SPI_FSL_SPI)
int type;
int native_chipselects;
u8 max_bits_per_word;
void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
int bits_per_word, int msb_first);
#endif
struct completion done;
};
struct spi_mpc8xxx_cs {
/* functions to deal with different sized buffers */
void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
u32 (*get_tx) (struct mpc8xxx_spi *);
u32 rx_shift; /* RX data reg shift when in qe mode */
u32 tx_shift; /* TX data reg shift when in qe mode */
u32 hw_mode; /* Holds HW mode register settings */
};
static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
{
iowrite32be(val, reg);
}
static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
{
return ioread32be(reg);
}
struct mpc8xxx_spi_probe_info {
struct fsl_spi_platform_data pdata;
int *gpios;
bool *alow_flags;
};
extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
struct fsl_spi_platform_data *pdata);
extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
struct spi_transfer *t, unsigned int len);
extern const char *mpc8xxx_spi_strmode(unsigned int flags);
extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
unsigned int irq);
extern int mpc8xxx_spi_remove(struct device *dev);
extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
#endif /* __SPI_FSL_LIB_H__ */
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