projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b36ece83 MH |
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 <[email protected]> | |
| 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 | ||
| ef6510ba KG |
21 | #include <asm/io.h> |
| 22 | ||
| b36ece83 MH |
23 | /* SPI/eSPI Controller driver's private data. */ |
| 24 | struct mpc8xxx_spi { | |
| 25 | struct device *dev; | |
| 46afd38b | 26 | void __iomem *reg_base; |
| b36ece83 MH |
27 | |
| 28 | /* rx & tx bufs from the spi_transfer */ | |
| 29 | const void *tx; | |
| 30 | void *rx; | |
| 31 | ||
| 32 | int subblock; | |
| 33 | struct spi_pram __iomem *pram; | |
| e8beacbb | 34 | #ifdef CONFIG_FSL_SOC |
| b36ece83 MH |
35 | struct cpm_buf_desc __iomem *tx_bd; |
| 36 | struct cpm_buf_desc __iomem *rx_bd; | |
| e8beacbb | 37 | #endif |
| b36ece83 MH |
38 | |
| 39 | struct spi_transfer *xfer_in_progress; | |
| 40 | ||
| 41 | /* dma addresses for CPM transfers */ | |
| 42 | dma_addr_t tx_dma; | |
| 43 | dma_addr_t rx_dma; | |
| 44 | bool map_tx_dma; | |
| 45 | bool map_rx_dma; | |
| 46 | ||
| 47 | dma_addr_t dma_dummy_tx; | |
| 48 | dma_addr_t dma_dummy_rx; | |
| 49 | ||
| 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 *); | |
| 53 | ||
| b36ece83 MH |
54 | unsigned int count; |
| 55 | unsigned int irq; | |
| 56 | ||
| 57 | unsigned nsecs; /* (clock cycle time)/2 */ | |
| 58 | ||
| 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 */ | |
| 62 | ||
| 63 | unsigned int flags; | |
| 64 | ||
| 38455d7a | 65 | #if IS_ENABLED(CONFIG_SPI_FSL_SPI) |
| c3f3e771 | 66 | int type; |
| 76a7498f | 67 | int native_chipselects; |
| 8922a366 | 68 | u8 max_bits_per_word; |
| c3f3e771 | 69 | |
| b48c4e3c AL |
70 | void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, |
| 71 | int bits_per_word, int msb_first); | |
| 72 | #endif | |
| 73 | ||
| b36ece83 MH |
74 | struct completion done; |
| 75 | }; | |
| 76 | ||
| 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 */ | |
| 84 | }; | |
| 85 | ||
| 86 | static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val) | |
| 87 | { | |
| e8beacbb | 88 | iowrite32be(val, reg); |
| b36ece83 MH |
89 | } |
| 90 | ||
| 91 | static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg) | |
| 92 | { | |
| e8beacbb | 93 | return ioread32be(reg); |
| b36ece83 MH |
94 | } |
| 95 | ||
| 96 | struct mpc8xxx_spi_probe_info { | |
| 97 | struct fsl_spi_platform_data pdata; | |
| 98 | int *gpios; | |
| 99 | bool *alow_flags; | |
| 100 | }; | |
| 101 | ||
| 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); | |
| 108 | ||
| 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); | |
| b36ece83 | 113 | extern const char *mpc8xxx_spi_strmode(unsigned int flags); |
| c592becb | 114 | extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem, |
| b36ece83 MH |
115 | unsigned int irq); |
| 116 | extern int mpc8xxx_spi_remove(struct device *dev); | |
| 18d306d1 | 117 | extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev); |
| b36ece83 MH |
118 | |
| 119 | #endif /* __SPI_FSL_LIB_H__ */ |