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Mingkai Hub36ece82010-10-12 18:18:31 +08001/*
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
Kumar Galaef6510b2010-10-14 08:55:47 -050021#include <asm/io.h>
22
Mingkai Hub36ece82010-10-12 18:18:31 +080023/* 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;
Esben Haabendal38455d7a2015-01-06 14:07:34 +010031#if IS_ENABLED(CONFIG_SPI_FSL_ESPI)
Mingkai Hu8b60d6c2010-10-12 18:18:32 +080032 int len;
33#endif
Mingkai Hub36ece82010-10-12 18:18:31 +080034
35 int subblock;
36 struct spi_pram __iomem *pram;
Andreas Larssone8beacb2013-02-15 16:52:21 +010037#ifdef CONFIG_FSL_SOC
Mingkai Hub36ece82010-10-12 18:18:31 +080038 struct cpm_buf_desc __iomem *tx_bd;
39 struct cpm_buf_desc __iomem *rx_bd;
Andreas Larssone8beacb2013-02-15 16:52:21 +010040#endif
Mingkai Hub36ece82010-10-12 18:18:31 +080041
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 /* hooks for different controller driver */
Mingkai Hub36ece82010-10-12 18:18:31 +080058 void (*spi_remove) (struct mpc8xxx_spi *mspi);
59
60 unsigned int count;
61 unsigned int irq;
62
63 unsigned nsecs; /* (clock cycle time)/2 */
64
65 u32 spibrg; /* SPIBRG input clock */
66 u32 rx_shift; /* RX data reg shift when in qe mode */
67 u32 tx_shift; /* TX data reg shift when in qe mode */
68
69 unsigned int flags;
70
Esben Haabendal38455d7a2015-01-06 14:07:34 +010071#if IS_ENABLED(CONFIG_SPI_FSL_SPI)
Andreas Larssonc3f3e772013-02-15 16:52:24 +010072 int type;
Andreas Larsson76a74982013-02-15 16:52:27 +010073 int native_chipselects;
Andreas Larsson8922a362013-02-15 16:52:25 +010074 u8 max_bits_per_word;
Andreas Larssonc3f3e772013-02-15 16:52:24 +010075
Andreas Larssonb48c4e32013-02-15 16:52:23 +010076 void (*set_shifts)(u32 *rx_shift, u32 *tx_shift,
77 int bits_per_word, int msb_first);
78#endif
79
Mingkai Hub36ece82010-10-12 18:18:31 +080080 struct completion done;
81};
82
83struct spi_mpc8xxx_cs {
84 /* functions to deal with different sized buffers */
85 void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
86 u32 (*get_tx) (struct mpc8xxx_spi *);
87 u32 rx_shift; /* RX data reg shift when in qe mode */
88 u32 tx_shift; /* TX data reg shift when in qe mode */
89 u32 hw_mode; /* Holds HW mode register settings */
90};
91
92static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
93{
Andreas Larssone8beacb2013-02-15 16:52:21 +010094 iowrite32be(val, reg);
Mingkai Hub36ece82010-10-12 18:18:31 +080095}
96
97static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
98{
Andreas Larssone8beacb2013-02-15 16:52:21 +010099 return ioread32be(reg);
Mingkai Hub36ece82010-10-12 18:18:31 +0800100}
101
102struct mpc8xxx_spi_probe_info {
103 struct fsl_spi_platform_data pdata;
104 int *gpios;
105 bool *alow_flags;
106};
107
108extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
109extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
110extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
111extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
112extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
113extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
114
115extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
116 struct fsl_spi_platform_data *pdata);
117extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
118 struct spi_transfer *t, unsigned int len);
Mingkai Hub36ece82010-10-12 18:18:31 +0800119extern const char *mpc8xxx_spi_strmode(unsigned int flags);
Heiner Kallweitc592bec2014-12-03 07:56:17 +0100120extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
Mingkai Hub36ece82010-10-12 18:18:31 +0800121 unsigned int irq);
122extern int mpc8xxx_spi_remove(struct device *dev);
Grant Likely18d306d2011-02-22 21:02:43 -0700123extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
Mingkai Hub36ece82010-10-12 18:18:31 +0800124
125#endif /* __SPI_FSL_LIB_H__ */