| 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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| 2 | #ifndef _UAPI_SPI_H |
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| 3 | #define _UAPI_SPI_H |
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| 4 | |
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| 5 | #include <linux/const.h> |
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| 6 | |
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| 7 | #define SPI_CPHA _BITUL(0) /* clock phase */ |
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| 8 | #define SPI_CPOL _BITUL(1) /* clock polarity */ |
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| 9 | |
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| 10 | #define SPI_MODE_0 (0|0) /* (original MicroWire) */ |
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| 11 | #define SPI_MODE_1 (0|SPI_CPHA) |
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| 12 | #define SPI_MODE_2 (SPI_CPOL|0) |
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| 13 | #define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) |
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| 14 | #define SPI_MODE_X_MASK (SPI_CPOL|SPI_CPHA) |
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| 15 | |
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| 16 | #define SPI_CS_HIGH _BITUL(2) /* chipselect active high? */ |
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| 17 | #define SPI_LSB_FIRST _BITUL(3) /* per-word bits-on-wire */ |
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| 18 | #define SPI_3WIRE _BITUL(4) /* SI/SO signals shared */ |
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| 19 | #define SPI_LOOP _BITUL(5) /* loopback mode */ |
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| 20 | #define SPI_NO_CS _BITUL(6) /* 1 dev/bus, no chipselect */ |
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| 21 | #define SPI_READY _BITUL(7) /* slave pulls low to pause */ |
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| 22 | #define SPI_TX_DUAL _BITUL(8) /* transmit with 2 wires */ |
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| 23 | #define SPI_TX_QUAD _BITUL(9) /* transmit with 4 wires */ |
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| 24 | #define SPI_RX_DUAL _BITUL(10) /* receive with 2 wires */ |
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| 25 | #define SPI_RX_QUAD _BITUL(11) /* receive with 4 wires */ |
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| 26 | #define SPI_CS_WORD _BITUL(12) /* toggle cs after each word */ |
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| 27 | #define SPI_TX_OCTAL _BITUL(13) /* transmit with 8 wires */ |
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| 28 | #define SPI_RX_OCTAL _BITUL(14) /* receive with 8 wires */ |
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| 29 | #define SPI_3WIRE_HIZ _BITUL(15) /* high impedance turnaround */ |
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| 30 | #define SPI_RX_CPHA_FLIP _BITUL(16) /* flip CPHA on Rx only xfer */ |
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| 31 | #define SPI_MOSI_IDLE_LOW _BITUL(17) /* leave MOSI line low when idle */ |
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| 32 | #define SPI_MOSI_IDLE_HIGH _BITUL(18) /* leave MOSI line high when idle */ |
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| 33 | |
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| 34 | /* |
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| 35 | * All the bits defined above should be covered by SPI_MODE_USER_MASK. |
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| 36 | * The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in |
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| 37 | * 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards |
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| 38 | * while in SPI_MODE_KERNEL_MASK they are from the other end downwards. |
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| 39 | * These bits must not overlap. A static assert check should make sure of that. |
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| 40 | * If adding extra bits, make sure to increase the bit index below as well. |
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| 41 | */ |
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| 42 | #define SPI_MODE_USER_MASK (_BITUL(19) - 1) |
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| 43 | |
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| 44 | #endif /* _UAPI_SPI_H */ |
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| 45 | |
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