1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19#ifndef SPI_CONTEXHUB_H
20
21#define SPI_CONTEXHUB_H
22
23#define SPI_CPHA                0x01
24#define SPI_CPOL                0x02
25
26#define SPI_MODE_0              (0|0)
27#define SPI_MODE_1              (0|SPI_CPHA)
28#define SPI_MODE_2              (SPI_CPOL|0)
29#define SPI_MODE_3              (SPI_CPOL|SPI_CPHA)
30
31#define SPI_CS_HIGH             0x04
32#define SPI_LSB_FIRST           0x08
33#define SPI_3WIRE               0x10
34#define SPI_LOOP                0x20
35#define SPI_NO_CS               0x40
36#define SPI_READY               0x80
37
38#define SPI_IOC_MAGIC           'k'
39
40struct spi_ioc_transfer {
41	__u64 tx_buf;
42	__u64 rx_buf;
43
44	__u32 len;
45	__u32 speed_hz;
46
47	__u16 delay_usecs;
48	__u8 bits_per_word;
49	__u8 cs_change;
50	__u32 pad;
51
52	/* If the contents of 'struct spi_ioc_transfer' ever change
53	 * incompatibly, then the ioctl number (currently 0) must change;
54	 * ioctls with constant size fields get a bit more in the way of
55	 * error checking than ones (like this) where that field varies.
56	 *
57	 * NOTE: struct layout is the same in 64bit and 32bit userspace.
58	 */
59};
60
61/* not all platforms use <asm-generic/ioctl.h> or _IOC_TYPECHECK() ... */
62#define SPI_MSGSIZE(N) \
63	((((N)*(sizeof (struct spi_ioc_transfer))) < (1 << _IOC_SIZEBITS)) \
64	? ((N)*(sizeof (struct spi_ioc_transfer))) : 0)
65
66#define SPI_IOC_MESSAGE(N) _IOW(SPI_IOC_MAGIC, 0, char[SPI_MSGSIZE(N)])
67
68/* Read / Write of SPI mode (SPI_MODE_0..SPI_MODE_3) */
69#define SPI_IOC_RD_MODE                 _IOR(SPI_IOC_MAGIC, 1, __u8)
70#define SPI_IOC_WR_MODE                 _IOW(SPI_IOC_MAGIC, 1, __u8)
71
72/* Read / Write SPI bit justification */
73#define SPI_IOC_RD_LSB_FIRST            _IOR(SPI_IOC_MAGIC, 2, __u8)
74#define SPI_IOC_WR_LSB_FIRST            _IOW(SPI_IOC_MAGIC, 2, __u8)
75
76/* Read / Write SPI device word length (1..N) */
77#define SPI_IOC_RD_BITS_PER_WORD        _IOR(SPI_IOC_MAGIC, 3, __u8)
78#define SPI_IOC_WR_BITS_PER_WORD        _IOW(SPI_IOC_MAGIC, 3, __u8)
79
80/* Read / Write SPI device default max speed hz */
81#define SPI_IOC_RD_MAX_SPEED_HZ         _IOR(SPI_IOC_MAGIC, 4, __u32)
82#define SPI_IOC_WR_MAX_SPEED_HZ         _IOW(SPI_IOC_MAGIC, 4, __u32)
83
84#define SPI_IOC_ENABLE_TIMESTAMPS       _IOW(SPI_IOC_MAGIC, 5, __u8)
85#define SPI_IOC_RESET_HUB               _IOW(SPI_IOC_MAGIC, 6, __u8)
86#define SPI_IOC_TXRX                    _IOW(SPI_IOC_MAGIC, 7, char[SPI_MSGSIZE(1)])
87#define SPI_IOC_NOTIFY_HUB_SUSPENDED    _IOW(SPI_IOC_MAGIC, 8, __u8)
88
89#endif // SPI_CONTEXHUB_H
90