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 | |