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gerrit.nordix.org / codeaurora / cp-linux / 7d38e033b98fd00da3a0b3a506c27c772f7167bf / . / drivers / spi / spi-fsl-lib.h
blob: 84f5dcb7a897d1388b0c08223c69ba661ca21017 [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[diff] [blame]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#if IS_ENABLED(CONFIG_SPI_FSL_ESPI)
32 int len;
33#endif
34
35 int subblock;
36 struct spi_pram __iomem *pram;
37#ifdef CONFIG_FSL_SOC
38 struct cpm_buf_desc __iomem *tx_bd;
39 struct cpm_buf_desc __iomem *rx_bd;
40#endif
41
42 struct spi_transfer *xfer_in_progress;
43
44 /* dma addresses for CPM transfers */
45 dma_addr_t tx_dma;
46 dma_addr_t rx_dma;
47 bool map_tx_dma;
48 bool map_rx_dma;
49
50 dma_addr_t dma_dummy_tx;
51 dma_addr_t dma_dummy_rx;
52
53 /* functions to deal with different sized buffers */
54 void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
55 u32(*get_tx) (struct mpc8xxx_spi *);
56
57 unsigned int count;
58 unsigned int irq;
59
60 unsigned nsecs; /* (clock cycle time)/2 */
61
62 u32 spibrg; /* SPIBRG input clock */
63 u32 rx_shift; /* RX data reg shift when in qe mode */
64 u32 tx_shift; /* TX data reg shift when in qe mode */
65
66 unsigned int flags;
67
68#if IS_ENABLED(CONFIG_SPI_FSL_SPI)
69 int type;
70 int native_chipselects;
71 u8 max_bits_per_word;
72
73 void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
74 int bits_per_word, int msb_first);
75#endif
76
77 struct completion done;
78};
79
80struct spi_mpc8xxx_cs {
81 /* functions to deal with different sized buffers */
82 void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
83 u32 (*get_tx) (struct mpc8xxx_spi *);
84 u32 rx_shift; /* RX data reg shift when in qe mode */
85 u32 tx_shift; /* TX data reg shift when in qe mode */
86 u32 hw_mode; /* Holds HW mode register settings */
87};
88
89static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
90{
91 iowrite32be(val, reg);
92}
93
94static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
95{
96 return ioread32be(reg);
97}
98
99struct mpc8xxx_spi_probe_info {
100 struct fsl_spi_platform_data pdata;
101 int *gpios;
102 bool *alow_flags;
103};
104
105extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
106extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
107extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
108extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
109extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
110extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
111
112extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
113 struct fsl_spi_platform_data *pdata);
114extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
115 struct spi_transfer *t, unsigned int len);
116extern const char *mpc8xxx_spi_strmode(unsigned int flags);
117extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
118 unsigned int irq);
119extern int mpc8xxx_spi_remove(struct device *dev);
120extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
121
122#endif /* __SPI_FSL_LIB_H__ */