/* * Freescale SPI/eSPI controller driver library. * * Maintainer: Kumar Gala * * Copyright 2010 Freescale Semiconductor, Inc. * Copyright (C) 2006 Polycom, Inc. * * CPM SPI and QE buffer descriptors mode support: * Copyright (c) 2009 MontaVista Software, Inc. * Author: Anton Vorontsov <avorontsov@ru.mvista.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #ifndef __SPI_FSL_LIB_H__ #define __SPI_FSL_LIB_H__ #include <asm/io.h> /* SPI/eSPI Controller driver's private data. */ struct mpc8xxx_spi { struct device *dev; void *reg_base; /* rx & tx bufs from the spi_transfer */ const void *tx; void *rx; #ifdef CONFIG_SPI_FSL_ESPI int len; #endif int subblock; struct spi_pram __iomem *pram; struct cpm_buf_desc __iomem *tx_bd; struct cpm_buf_desc __iomem *rx_bd; struct spi_transfer *xfer_in_progress; /* dma addresses for CPM transfers */ dma_addr_t tx_dma; dma_addr_t rx_dma; bool map_tx_dma; bool map_rx_dma; dma_addr_t dma_dummy_tx; dma_addr_t dma_dummy_rx; /* functions to deal with different sized buffers */ void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *); u32(*get_tx) (struct mpc8xxx_spi *); /* hooks for different controller driver */ void (*spi_do_one_msg) (struct spi_message *m); void (*spi_remove) (struct mpc8xxx_spi *mspi); unsigned int count; unsigned int irq; unsigned nsecs; /* (clock cycle time)/2 */ u32 spibrg; /* SPIBRG input clock */ u32 rx_shift; /* RX data reg shift when in qe mode */ u32 tx_shift; /* TX data reg shift when in qe mode */ unsigned int flags; struct workqueue_struct *workqueue; struct work_struct work; struct list_head queue; spinlock_t lock; struct completion done; }; struct spi_mpc8xxx_cs { /* functions to deal with different sized buffers */ void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *); u32 (*get_tx) (struct mpc8xxx_spi *); u32 rx_shift; /* RX data reg shift when in qe mode */ u32 tx_shift; /* TX data reg shift when in qe mode */ u32 hw_mode; /* Holds HW mode register settings */ }; static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val) { out_be32(reg, val); } static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg) { return in_be32(reg); } struct mpc8xxx_spi_probe_info { struct fsl_spi_platform_data pdata; int *gpios; bool *alow_flags; }; extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi); extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi); extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi); extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); extern struct mpc8xxx_spi_probe_info *to_of_pinfo( struct fsl_spi_platform_data *pdata); extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi, struct spi_transfer *t, unsigned int len); extern int mpc8xxx_spi_transfer(struct spi_device *spi, struct spi_message *m); extern void mpc8xxx_spi_cleanup(struct spi_device *spi); extern const char *mpc8xxx_spi_strmode(unsigned int flags); extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq); extern int mpc8xxx_spi_remove(struct device *dev); extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev); #endif /* __SPI_FSL_LIB_H__ */