| 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
|---|
| 2 | #ifndef _UAPI_SPI_H |
|---|
| 3 | #define _UAPI_SPI_H |
|---|
| 4 | |
|---|
| 5 | #include <linux/const.h> |
|---|
| 6 | |
|---|
| 7 | #define SPI_CPHA _BITUL(0) /* clock phase */ |
|---|
| 8 | #define SPI_CPOL _BITUL(1) /* clock polarity */ |
|---|
| 9 | |
|---|
| 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) |
|---|
| 15 | |
|---|
| 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 | |
|---|
| 33 | /* |
|---|
| 34 | * All the bits defined above should be covered by SPI_MODE_USER_MASK. |
|---|
| 35 | * The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in |
|---|
| 36 | * 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards |
|---|
| 37 | * while in SPI_MODE_KERNEL_MASK they are from the other end downwards. |
|---|
| 38 | * These bits must not overlap. A static assert check should make sure of that. |
|---|
| 39 | * If adding extra bits, make sure to increase the bit index below as well. |
|---|
| 40 | */ |
|---|
| 41 | #define SPI_MODE_USER_MASK (_BITUL(18) - 1) |
|---|
| 42 | |
|---|
| 43 | #endif /* _UAPI_SPI_H */ |
|---|
| 44 | |
|---|
