2 * Freescale SPI/eSPI controller driver library.
4 * Maintainer: Kumar Gala
6 * Copyright 2010 Freescale Semiconductor, Inc.
7 * Copyright (C) 2006 Polycom, Inc.
9 * CPM SPI and QE buffer descriptors mode support:
10 * Copyright (c) 2009 MontaVista Software, Inc.
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.
18 #ifndef __SPI_FSL_LIB_H__
19 #define __SPI_FSL_LIB_H__
23 /* SPI/eSPI Controller driver's private data. */
26 void __iomem *reg_base;
28 /* rx & tx bufs from the spi_transfer */
33 struct spi_pram __iomem *pram;
35 struct cpm_buf_desc __iomem *tx_bd;
36 struct cpm_buf_desc __iomem *rx_bd;
39 struct spi_transfer *xfer_in_progress;
41 /* dma addresses for CPM transfers */
47 dma_addr_t dma_dummy_tx;
48 dma_addr_t dma_dummy_rx;
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 *);
57 unsigned nsecs; /* (clock cycle time)/2 */
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 */
65 #if IS_ENABLED(CONFIG_SPI_FSL_SPI)
67 int native_chipselects;
70 void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
71 int bits_per_word, int msb_first);
74 struct completion done;
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 */
86 static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
88 iowrite32be(val, reg);
91 static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
93 return ioread32be(reg);
96 struct mpc8xxx_spi_probe_info {
97 struct fsl_spi_platform_data pdata;
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);
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,
116 extern int mpc8xxx_spi_remove(struct device *dev);
117 extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
119 #endif /* __SPI_FSL_LIB_H__ */