drivers/spi/spi-fsl-lib.h

   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. */
  20 struct 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
  73 struct 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
  82 static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
  83 {
  84         iowrite32be(val, reg);
  85 }
  86
  87 static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
  88 {
  89         return ioread32be(reg);
  90 }
  91
  92 struct mpc8xxx_spi_probe_info {
  93         struct fsl_spi_platform_data pdata;
  94         __be32 __iomem *immr_spi_cs;
  95 };
  96
  97 extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
  98 extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
  99 extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
 100 extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 101 extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 102 extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
 103
 104 extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
 105                 struct fsl_spi_platform_data *pdata);
 106 extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
 107                 struct spi_transfer *t, unsigned int len);
 108 extern const char *mpc8xxx_spi_strmode(unsigned int flags);
 109 extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
 110                 unsigned int irq);
 111 extern int mpc8xxx_spi_remove(struct device *dev);
 112 extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
 113
 114 #endif /* __SPI_FSL_LIB_H__ */