bfin5xx_spi.h

/*
 * Blackfin On-Chip SPI Driver
 *
 * Copyright 2004-2008 Analog Devices Inc.
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef _SPI_CHANNEL_H_
#define _SPI_CHANNEL_H_

#define MIN_SPI_BAUD_VAL	2

#define SPI_READ              0
#define SPI_WRITE             1

#define SPI_CTRL_OFF            0x0
#define SPI_FLAG_OFF            0x4
#define SPI_STAT_OFF            0x8
#define SPI_TXBUFF_OFF          0xc
#define SPI_RXBUFF_OFF          0x10
#define SPI_BAUD_OFF            0x14
#define SPI_SHAW_OFF            0x18


#define BIT_CTL_ENABLE      0x4000
#define BIT_CTL_OPENDRAIN   0x2000
#define BIT_CTL_MASTER      0x1000
#define BIT_CTL_POLAR       0x0800
#define BIT_CTL_PHASE       0x0400
#define BIT_CTL_BITORDER    0x0200
#define BIT_CTL_WORDSIZE    0x0100
#define BIT_CTL_MISOENABLE  0x0020
#define BIT_CTL_RXMOD       0x0000
#define BIT_CTL_TXMOD       0x0001
#define BIT_CTL_TIMOD_DMA_TX 0x0003
#define BIT_CTL_TIMOD_DMA_RX 0x0002
#define BIT_CTL_SENDOPT     0x0004
#define BIT_CTL_TIMOD       0x0003

#define BIT_STAT_SPIF       0x0001
#define BIT_STAT_MODF       0x0002
#define BIT_STAT_TXE        0x0004
#define BIT_STAT_TXS        0x0008
#define BIT_STAT_RBSY       0x0010
#define BIT_STAT_RXS        0x0020
#define BIT_STAT_TXCOL      0x0040
#define BIT_STAT_CLR        0xFFFF

#define BIT_STU_SENDOVER    0x0001
#define BIT_STU_RECVFULL    0x0020

#define CFG_SPI_ENABLE      1
#define CFG_SPI_DISABLE     0

#define CFG_SPI_OUTENABLE   1
#define CFG_SPI_OUTDISABLE  0

#define CFG_SPI_ACTLOW      1
#define CFG_SPI_ACTHIGH     0

#define CFG_SPI_PHASESTART  1
#define CFG_SPI_PHASEMID    0

#define CFG_SPI_MASTER      1
#define CFG_SPI_SLAVE       0

#define CFG_SPI_SENELAST    0
#define CFG_SPI_SENDZERO    1

#define CFG_SPI_RCVFLUSH    1
#define CFG_SPI_RCVDISCARD  0

#define CFG_SPI_LSBFIRST    1
#define CFG_SPI_MSBFIRST    0

#define CFG_SPI_WORDSIZE16  1
#define CFG_SPI_WORDSIZE8   0

#define CFG_SPI_MISOENABLE   1
#define CFG_SPI_MISODISABLE  0

#define CFG_SPI_READ      0x00
#define CFG_SPI_WRITE     0x01
#define CFG_SPI_DMAREAD   0x02
#define CFG_SPI_DMAWRITE  0x03

#define CFG_SPI_CSCLEARALL  0
#define CFG_SPI_CHIPSEL1    1
#define CFG_SPI_CHIPSEL2    2
#define CFG_SPI_CHIPSEL3    3
#define CFG_SPI_CHIPSEL4    4
#define CFG_SPI_CHIPSEL5    5
#define CFG_SPI_CHIPSEL6    6
#define CFG_SPI_CHIPSEL7    7

#define CFG_SPI_CS1VALUE    1
#define CFG_SPI_CS2VALUE    2
#define CFG_SPI_CS3VALUE    3
#define CFG_SPI_CS4VALUE    4
#define CFG_SPI_CS5VALUE    5
#define CFG_SPI_CS6VALUE    6
#define CFG_SPI_CS7VALUE    7

#define CMD_SPI_SET_BAUDRATE  2
#define CMD_SPI_GET_SYSTEMCLOCK   25
#define CMD_SPI_SET_WRITECONTINUOUS     26

/* device.platform_data for SSP controller devices */
struct bfin5xx_spi_master {
	u16 num_chipselect;
	u8 enable_dma;
	u16 pin_req[7];
};

/* spi_board_info.controller_data for SPI slave devices,
 * copied to spi_device.platform_data ... mostly for dma tuning
 */
struct bfin5xx_spi_chip {
	u16 ctl_reg;
	u8 enable_dma;
	u8 bits_per_word;
	u8 cs_change_per_word;
	u16 cs_chg_udelay; /* Some devices require 16-bit delays */
	u32 cs_gpio;
	/* Value to send if no TX value is supplied, usually 0x0 or 0xFFFF */
	u16 idle_tx_val;
	u8 pio_interrupt; /* Enable spi data irq */
};

#endif /* _SPI_CHANNEL_H_ */