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gerrit-public.fairphone.software / kernel / msm / f14bfe94e459cb070a489e1786f26d54e9e7b5de / . / drivers / spi / spi_fsl_lib.h
blob: 281e060977cdfedb1561edba3d1b82eb99a568dd [file] [log] [blame]
Mingkai Hub36ece82010-10-12 18:18:31 +0800[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
Kumar Galaef6510b2010-10-14 08:55:47 -0500[diff] [blame]21#include <asm/io.h>
22
Mingkai Hub36ece82010-10-12 18:18:31 +0800[diff] [blame]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;
Mingkai Hu8b60d6c2010-10-12 18:18:32 +0800[diff] [blame]31#ifdef CONFIG_SPI_FSL_ESPI
32 int len;
33#endif
Mingkai Hub36ece82010-10-12 18:18:31 +0800[diff] [blame]34
35 int subblock;
36 struct spi_pram __iomem *pram;
37 struct cpm_buf_desc __iomem *tx_bd;
38 struct cpm_buf_desc __iomem *rx_bd;
39
40 struct spi_transfer *xfer_in_progress;
41
42 /* dma addresses for CPM transfers */
43 dma_addr_t tx_dma;
44 dma_addr_t rx_dma;
45 bool map_tx_dma;
46 bool map_rx_dma;
47
48 dma_addr_t dma_dummy_tx;
49 dma_addr_t dma_dummy_rx;
50
51 /* functions to deal with different sized buffers */
52 void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
53 u32(*get_tx) (struct mpc8xxx_spi *);
54
55 /* hooks for different controller driver */
56 void (*spi_do_one_msg) (struct spi_message *m);
57 void (*spi_remove) (struct mpc8xxx_spi *mspi);
58
59 unsigned int count;
60 unsigned int irq;
61
62 unsigned nsecs; /* (clock cycle time)/2 */
63
64 u32 spibrg; /* SPIBRG input clock */
65 u32 rx_shift; /* RX data reg shift when in qe mode */
66 u32 tx_shift; /* TX data reg shift when in qe mode */
67
68 unsigned int flags;
69
70 struct workqueue_struct *workqueue;
71 struct work_struct work;
72
73 struct list_head queue;
74 spinlock_t lock;
75
76 struct completion done;
77};
78
79struct spi_mpc8xxx_cs {
80 /* functions to deal with different sized buffers */
81 void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
82 u32 (*get_tx) (struct mpc8xxx_spi *);
83 u32 rx_shift; /* RX data reg shift when in qe mode */
84 u32 tx_shift; /* TX data reg shift when in qe mode */
85 u32 hw_mode; /* Holds HW mode register settings */
86};
87
88static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
89{
90 out_be32(reg, val);
91}
92
93static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
94{
95 return in_be32(reg);
96}
97
98struct mpc8xxx_spi_probe_info {
99 struct fsl_spi_platform_data pdata;
100 int *gpios;
101 bool *alow_flags;
102};
103
104extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
105extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
106extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
107extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
108extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
109extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
110
111extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
112 struct fsl_spi_platform_data *pdata);
113extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
114 struct spi_transfer *t, unsigned int len);
115extern int mpc8xxx_spi_transfer(struct spi_device *spi, struct spi_message *m);
116extern void mpc8xxx_spi_cleanup(struct spi_device *spi);
117extern const char *mpc8xxx_spi_strmode(unsigned int flags);
118extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
119 unsigned int irq);
120extern int mpc8xxx_spi_remove(struct device *dev);
121extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev,
122 const struct of_device_id *ofid);
123
124#endif /* __SPI_FSL_LIB_H__ */