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oasis-root

Compiled tree of Oasis Linux based on own branch at <https://hacktivis.me/git/oasis/> git clone https://anongit.hacktivis.me/git/oasis-root.git

spi.h (1989B)

    

  1. /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
  2. #ifndef _SPI_H
  3. #define _SPI_H
  5. #include <linux/const.h>
  7. #define	SPI_CPHA		_BITUL(0)	/* clock phase */
  8. #define	SPI_CPOL		_BITUL(1)	/* clock polarity */
  10. #define	SPI_MODE_0		(0|0)		/* (original MicroWire) */
  11. #define	SPI_MODE_1		(0|SPI_CPHA)
  12. #define	SPI_MODE_2		(SPI_CPOL|0)
  13. #define	SPI_MODE_3		(SPI_CPOL|SPI_CPHA)
  14. #define	SPI_MODE_X_MASK		(SPI_CPOL|SPI_CPHA)
  16. #define	SPI_CS_HIGH		_BITUL(2)	/* chipselect active high? */
  17. #define	SPI_LSB_FIRST		_BITUL(3)	/* per-word bits-on-wire */
  18. #define	SPI_3WIRE		_BITUL(4)	/* SI/SO signals shared */
  19. #define	SPI_LOOP		_BITUL(5)	/* loopback mode */
  20. #define	SPI_NO_CS		_BITUL(6)	/* 1 dev/bus, no chipselect */
  21. #define	SPI_READY		_BITUL(7)	/* slave pulls low to pause */
  22. #define	SPI_TX_DUAL		_BITUL(8)	/* transmit with 2 wires */
  23. #define	SPI_TX_QUAD		_BITUL(9)	/* transmit with 4 wires */
  24. #define	SPI_RX_DUAL		_BITUL(10)	/* receive with 2 wires */
  25. #define	SPI_RX_QUAD		_BITUL(11)	/* receive with 4 wires */
  26. #define	SPI_CS_WORD		_BITUL(12)	/* toggle cs after each word */
  27. #define	SPI_TX_OCTAL		_BITUL(13)	/* transmit with 8 wires */
  28. #define	SPI_RX_OCTAL		_BITUL(14)	/* receive with 8 wires */
  29. #define	SPI_3WIRE_HIZ		_BITUL(15)	/* high impedance turnaround */
  30. #define	SPI_RX_CPHA_FLIP	_BITUL(16)	/* flip CPHA on Rx only xfer */
  31. #define SPI_MOSI_IDLE_LOW	_BITUL(17)	/* leave MOSI line low when idle */
  32. #define SPI_MOSI_IDLE_HIGH	_BITUL(18)	/* leave MOSI line high when idle */
  34. /*
  35.  * All the bits defined above should be covered by SPI_MODE_USER_MASK.
  36.  * The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in
  37.  * 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards
  38.  * while in SPI_MODE_KERNEL_MASK they are from the other end downwards.
  39.  * These bits must not overlap. A static assert check should make sure of that.
  40.  * If adding extra bits, make sure to increase the bit index below as well.
  41.  */
  42. #define SPI_MODE_USER_MASK	(_BITUL(19) - 1)
  44. #endif /* _SPI_H */