Mingkai Hu | b36ece8 | 2010-10-12 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 Gala | ef6510b | 2010-10-14 08:55:47 -0500 | [diff] [blame] | 21 | #include <asm/io.h> |
| 22 | |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 23 | /* SPI/eSPI Controller driver's private data. */ |
| 24 | struct 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 Hu | 8b60d6c | 2010-10-12 18:18:32 +0800 | [diff] [blame] | 31 | #ifdef CONFIG_SPI_FSL_ESPI |
| 32 | int len; |
| 33 | #endif |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 34 | |
| 35 | int subblock; |
| 36 | struct spi_pram __iomem *pram; |
Andreas Larsson | e8beacb | 2013-02-15 16:52:21 +0100 | [diff] [blame] | 37 | #ifdef CONFIG_FSL_SOC |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 38 | struct cpm_buf_desc __iomem *tx_bd; |
| 39 | struct cpm_buf_desc __iomem *rx_bd; |
Andreas Larsson | e8beacb | 2013-02-15 16:52:21 +0100 | [diff] [blame] | 40 | #endif |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 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 | /* hooks for different controller driver */ |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 58 | 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 | |
Andreas Larsson | b48c4e3 | 2013-02-15 16:52:23 +0100 | [diff] [blame] | 71 | #ifdef CONFIG_SPI_FSL_SPI |
Andreas Larsson | c3f3e77 | 2013-02-15 16:52:24 +0100 | [diff] [blame] | 72 | int type; |
Andreas Larsson | 76a7498 | 2013-02-15 16:52:27 +0100 | [diff] [blame] | 73 | int native_chipselects; |
Andreas Larsson | 8922a36 | 2013-02-15 16:52:25 +0100 | [diff] [blame] | 74 | u8 max_bits_per_word; |
Andreas Larsson | c3f3e77 | 2013-02-15 16:52:24 +0100 | [diff] [blame] | 75 | |
Andreas Larsson | b48c4e3 | 2013-02-15 16:52:23 +0100 | [diff] [blame] | 76 | void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, |
| 77 | int bits_per_word, int msb_first); |
| 78 | #endif |
| 79 | |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 80 | struct completion done; |
| 81 | }; |
| 82 | |
| 83 | struct 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 | |
| 92 | static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val) |
| 93 | { |
Andreas Larsson | e8beacb | 2013-02-15 16:52:21 +0100 | [diff] [blame] | 94 | iowrite32be(val, reg); |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg) |
| 98 | { |
Andreas Larsson | e8beacb | 2013-02-15 16:52:21 +0100 | [diff] [blame] | 99 | return ioread32be(reg); |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | struct mpc8xxx_spi_probe_info { |
| 103 | struct fsl_spi_platform_data pdata; |
| 104 | int *gpios; |
| 105 | bool *alow_flags; |
| 106 | }; |
| 107 | |
| 108 | extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi); |
| 109 | extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi); |
| 110 | extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi); |
| 111 | extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); |
| 112 | extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); |
| 113 | extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); |
| 114 | |
| 115 | extern struct mpc8xxx_spi_probe_info *to_of_pinfo( |
| 116 | struct fsl_spi_platform_data *pdata); |
| 117 | extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi, |
| 118 | struct spi_transfer *t, unsigned int len); |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 119 | extern const char *mpc8xxx_spi_strmode(unsigned int flags); |
Heiner Kallweit | c592bec | 2014-12-03 07:56:17 +0100 | [diff] [blame] | 120 | extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem, |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 121 | unsigned int irq); |
| 122 | extern int mpc8xxx_spi_remove(struct device *dev); |
Grant Likely | 18d306d | 2011-02-22 21:02:43 -0700 | [diff] [blame] | 123 | extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev); |
Mingkai Hu | b36ece8 | 2010-10-12 18:18:31 +0800 | [diff] [blame] | 124 | |
| 125 | #endif /* __SPI_FSL_LIB_H__ */ |