linux/drivers/spi/spi-fsl-lib.h
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   1/*
   2 * Freescale SPI/eSPI controller driver library.
   3 *
   4 * Maintainer: Kumar Gala
   5 *
   6 * Copyright 2010 Freescale Semiconductor, Inc.
   7 * Copyright (C) 2006 Polycom, Inc.
   8 *
   9 * CPM SPI and QE buffer descriptors mode support:
  10 * Copyright (c) 2009  MontaVista Software, Inc.
  11 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
  12 *
  13 * This program is free software; you can redistribute  it and/or modify it
  14 * under  the terms of  the GNU General  Public License as published by the
  15 * Free Software Foundation;  either version 2 of the  License, or (at your
  16 * option) any later version.
  17 */
  18#ifndef __SPI_FSL_LIB_H__
  19#define __SPI_FSL_LIB_H__
  20
  21#include <asm/io.h>
  22
  23/* SPI/eSPI Controller driver's private data. */
  24struct mpc8xxx_spi {
  25        struct device *dev;
  26        void *reg_base;
  27
  28        /* rx & tx bufs from the spi_transfer */
  29        const void *tx;
  30        void *rx;
  31#ifdef CONFIG_SPI_FSL_ESPI
  32        int len;
  33#endif
  34
  35        int subblock;
  36        struct spi_pram __iomem *pram;
  37        struct cpm_buf_desc __iomem *tx_bd;
  38        struct cpm_buf_desc __iomem *rx_bd;
  39
  40        struct spi_transfer *xfer_in_progress;
  41
  42        /* dma addresses for CPM transfers */
  43        dma_addr_t tx_dma;
  44        dma_addr_t rx_dma;
  45        bool map_tx_dma;
  46        bool map_rx_dma;
  47
  48        dma_addr_t dma_dummy_tx;
  49        dma_addr_t dma_dummy_rx;
  50
  51        /* functions to deal with different sized buffers */
  52        void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
  53        u32(*get_tx) (struct mpc8xxx_spi *);
  54
  55        /* hooks for different controller driver */
  56        void (*spi_do_one_msg) (struct spi_message *m);
  57        void (*spi_remove) (struct mpc8xxx_spi *mspi);
  58
  59        unsigned int count;
  60        unsigned int irq;
  61
  62        unsigned nsecs;         /* (clock cycle time)/2 */
  63
  64        u32 spibrg;             /* SPIBRG input clock */
  65        u32 rx_shift;           /* RX data reg shift when in qe mode */
  66        u32 tx_shift;           /* TX data reg shift when in qe mode */
  67
  68        unsigned int flags;
  69
  70        struct workqueue_struct *workqueue;
  71        struct work_struct work;
  72
  73        struct list_head queue;
  74        spinlock_t lock;
  75
  76        struct completion done;
  77};
  78
  79struct spi_mpc8xxx_cs {
  80        /* functions to deal with different sized buffers */
  81        void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
  82        u32 (*get_tx) (struct mpc8xxx_spi *);
  83        u32 rx_shift;           /* RX data reg shift when in qe mode */
  84        u32 tx_shift;           /* TX data reg shift when in qe mode */
  85        u32 hw_mode;            /* Holds HW mode register settings */
  86};
  87
  88static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
  89{
  90        out_be32(reg, val);
  91}
  92
  93static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
  94{
  95        return in_be32(reg);
  96}
  97
  98struct mpc8xxx_spi_probe_info {
  99        struct fsl_spi_platform_data pdata;
 100        int *gpios;
 101        bool *alow_flags;
 102};
 103
 104extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
 105extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
 106extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
 107extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 108extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 109extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 110
 111extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
 112                struct fsl_spi_platform_data *pdata);
 113extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
 114                struct spi_transfer *t, unsigned int len);
 115extern int mpc8xxx_spi_transfer(struct spi_device *spi, struct spi_message *m);
 116extern void mpc8xxx_spi_cleanup(struct spi_device *spi);
 117extern const char *mpc8xxx_spi_strmode(unsigned int flags);
 118extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
 119                unsigned int irq);
 120extern int mpc8xxx_spi_remove(struct device *dev);
 121extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
 122
 123#endif /* __SPI_FSL_LIB_H__ */
 124
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