1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Freescale SPI/eSPI controller driver library.
5 * Maintainer: Kumar Gala
7 * Copyright 2010 Freescale Semiconductor, Inc.
8 * Copyright (C) 2006 Polycom, Inc.
10 * CPM SPI and QE buffer descriptors mode support:
11 * Copyright (c) 2009 MontaVista Software, Inc.
12 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
14 #ifndef __SPI_FSL_LIB_H__
15 #define __SPI_FSL_LIB_H__
19 /* SPI/eSPI Controller driver's private data. */
22 void __iomem *reg_base;
24 /* rx & tx bufs from the spi_transfer */
29 struct spi_pram __iomem *pram;
31 struct cpm_buf_desc __iomem *tx_bd;
32 struct cpm_buf_desc __iomem *rx_bd;
35 struct spi_transfer *xfer_in_progress;
37 /* dma addresses for CPM transfers */
43 dma_addr_t dma_dummy_tx;
44 dma_addr_t dma_dummy_rx;
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 *);
53 unsigned nsecs; /* (clock cycle time)/2 */
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 */
61 #if IS_ENABLED(CONFIG_SPI_FSL_SPI)
63 int native_chipselects;
66 void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
67 int bits_per_word, int msb_first);
70 struct completion done;
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 */
82 static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
84 iowrite32be(val, reg);
87 static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
89 return ioread32be(reg);
92 struct mpc8xxx_spi_probe_info {
93 struct fsl_spi_platform_data pdata;
94 __be32 __iomem *immr_spi_cs;
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);
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,
111 extern int mpc8xxx_spi_remove(struct device *dev);
112 extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
114 #endif /* __SPI_FSL_LIB_H__ */