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. */ 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; 31 #ifdef CONFIG_SPI_FSL_ESPI 32 int len; 33 #endif 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 79 struct 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 88 static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val) 89 { 90 out_be32(reg, val); 91 } 92 93 static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg) 94 { 95 return in_be32(reg); 96 } 97 98 struct mpc8xxx_spi_probe_info { 99 struct fsl_spi_platform_data pdata; 100 int *gpios; 101 bool *alow_flags; 102 }; 103 104 extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi); 105 extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi); 106 extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi); 107 extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); 108 extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); 109 extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); 110 111 extern struct mpc8xxx_spi_probe_info *to_of_pinfo( 112 struct fsl_spi_platform_data *pdata); 113 extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi, 114 struct spi_transfer *t, unsigned int len); 115 extern int mpc8xxx_spi_transfer(struct spi_device *spi, struct spi_message *m); 116 extern void mpc8xxx_spi_cleanup(struct spi_device *spi); 117 extern const char *mpc8xxx_spi_strmode(unsigned int flags); 118 extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem, 119 unsigned int irq); 120 extern int mpc8xxx_spi_remove(struct device *dev); 121 extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev); 122 123 #endif /* __SPI_FSL_LIB_H__ */ 124