drivers/spi/spi-fsl-lib.h

   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. */
  24 struct mpc8xxx_spi {
  25         struct device *dev;
  26         void __iomem *reg_base;
  27
  28         /* rx & tx bufs from the spi_transfer */
  29         const void *tx;
  30         void *rx;
  31
  32         int subblock;
  33         struct spi_pram __iomem *pram;
  34 #ifdef CONFIG_FSL_SOC
  35         struct cpm_buf_desc __iomem *tx_bd;
  36         struct cpm_buf_desc __iomem *rx_bd;
  37 #endif
  38
  39         struct spi_transfer *xfer_in_progress;
  40
  41         /* dma addresses for CPM transfers */
  42         dma_addr_t tx_dma;
  43         dma_addr_t rx_dma;
  44         bool map_tx_dma;
  45         bool map_rx_dma;
  46
  47         dma_addr_t dma_dummy_tx;
  48         dma_addr_t dma_dummy_rx;
  49
  50         /* functions to deal with different sized buffers */
  51         void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
  52         u32(*get_tx) (struct mpc8xxx_spi *);
  53
  54         unsigned int count;
  55         unsigned int irq;
  56
  57         unsigned nsecs;         /* (clock cycle time)/2 */
  58
  59         u32 spibrg;             /* SPIBRG input clock */
  60         u32 rx_shift;           /* RX data reg shift when in qe mode */
  61         u32 tx_shift;           /* TX data reg shift when in qe mode */
  62
  63         unsigned int flags;
  64
  65 #if IS_ENABLED(CONFIG_SPI_FSL_SPI)
  66         int type;
  67         int native_chipselects;
  68         u8 max_bits_per_word;
  69
  70         void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
  71                            int bits_per_word, int msb_first);
  72 #endif
  73
  74         struct completion done;
  75 };
  76
  77 struct spi_mpc8xxx_cs {
  78         /* functions to deal with different sized buffers */
  79         void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
  80         u32 (*get_tx) (struct mpc8xxx_spi *);
  81         u32 rx_shift;           /* RX data reg shift when in qe mode */
  82         u32 tx_shift;           /* TX data reg shift when in qe mode */
  83         u32 hw_mode;            /* Holds HW mode register settings */
  84 };
  85
  86 static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
  87 {
  88         iowrite32be(val, reg);
  89 }
  90
  91 static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
  92 {
  93         return ioread32be(reg);
  94 }
  95
  96 struct mpc8xxx_spi_probe_info {
  97         struct fsl_spi_platform_data pdata;
  98         int *gpios;
  99         bool *alow_flags;
 100 };
 101
 102 extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
 103 extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
 104 extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
 105 extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 106 extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 107 extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 108
 109 extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
 110                 struct fsl_spi_platform_data *pdata);
 111 extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
 112                 struct spi_transfer *t, unsigned int len);
 113 extern const char *mpc8xxx_spi_strmode(unsigned int flags);
 114 extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
 115                 unsigned int irq);
 116 extern int mpc8xxx_spi_remove(struct device *dev);
 117 extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
 118
 119 #endif /* __SPI_FSL_LIB_H__ */