diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-13 16:26:39 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-13 16:26:39 -0400 |
commit | 034b5eeb6bc783e7f60e11299154556e65699e7a (patch) | |
tree | 3afbe5520e5d95ea99b1db9caf3884282a829d67 /include/linux | |
parent | 7c5a47346989e43ba34a9c94a55cc0aef7ed6b3b (diff) | |
parent | 7939d3c2a677b06cf111a1304710dd97892f3695 (diff) |
Merge tag 'disintegrate-spi-20121009' of git://git.infradead.org/users/dhowells/linux-headers
Pull spi UAPI disintegration from David Howells:
"This is to complete part of the Userspace API (UAPI) disintegration
for which the preparatory patches were pulled recently. After these
patches, userspace headers will be segregated into:
include/uapi/linux/.../foo.h
for the userspace interface stuff, and:
include/linux/.../foo.h
for the strictly kernel internal stuff.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>"
* tag 'disintegrate-spi-20121009' of git://git.infradead.org/users/dhowells/linux-headers:
UAPI: (Scripted) Disintegrate include/linux/spi
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/spi/Kbuild | 1 | ||||
-rw-r--r-- | include/linux/spi/spidev.h | 131 |
2 files changed, 0 insertions, 132 deletions
diff --git a/include/linux/spi/Kbuild b/include/linux/spi/Kbuild index d375a082986e..e69de29bb2d1 100644 --- a/include/linux/spi/Kbuild +++ b/include/linux/spi/Kbuild | |||
@@ -1 +0,0 @@ | |||
1 | header-y += spidev.h | ||
diff --git a/include/linux/spi/spidev.h b/include/linux/spi/spidev.h deleted file mode 100644 index 52d9ed01855f..000000000000 --- a/include/linux/spi/spidev.h +++ /dev/null | |||
@@ -1,131 +0,0 @@ | |||
1 | /* | ||
2 | * include/linux/spi/spidev.h | ||
3 | * | ||
4 | * Copyright (C) 2006 SWAPP | ||
5 | * Andrea Paterniani <a.paterniani@swapp-eng.it> | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
20 | */ | ||
21 | |||
22 | #ifndef SPIDEV_H | ||
23 | #define SPIDEV_H | ||
24 | |||
25 | #include <linux/types.h> | ||
26 | |||
27 | /* User space versions of kernel symbols for SPI clocking modes, | ||
28 | * matching <linux/spi/spi.h> | ||
29 | */ | ||
30 | |||
31 | #define SPI_CPHA 0x01 | ||
32 | #define SPI_CPOL 0x02 | ||
33 | |||
34 | #define SPI_MODE_0 (0|0) | ||
35 | #define SPI_MODE_1 (0|SPI_CPHA) | ||
36 | #define SPI_MODE_2 (SPI_CPOL|0) | ||
37 | #define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) | ||
38 | |||
39 | #define SPI_CS_HIGH 0x04 | ||
40 | #define SPI_LSB_FIRST 0x08 | ||
41 | #define SPI_3WIRE 0x10 | ||
42 | #define SPI_LOOP 0x20 | ||
43 | #define SPI_NO_CS 0x40 | ||
44 | #define SPI_READY 0x80 | ||
45 | |||
46 | /*---------------------------------------------------------------------------*/ | ||
47 | |||
48 | /* IOCTL commands */ | ||
49 | |||
50 | #define SPI_IOC_MAGIC 'k' | ||
51 | |||
52 | /** | ||
53 | * struct spi_ioc_transfer - describes a single SPI transfer | ||
54 | * @tx_buf: Holds pointer to userspace buffer with transmit data, or null. | ||
55 | * If no data is provided, zeroes are shifted out. | ||
56 | * @rx_buf: Holds pointer to userspace buffer for receive data, or null. | ||
57 | * @len: Length of tx and rx buffers, in bytes. | ||
58 | * @speed_hz: Temporary override of the device's bitrate. | ||
59 | * @bits_per_word: Temporary override of the device's wordsize. | ||
60 | * @delay_usecs: If nonzero, how long to delay after the last bit transfer | ||
61 | * before optionally deselecting the device before the next transfer. | ||
62 | * @cs_change: True to deselect device before starting the next transfer. | ||
63 | * | ||
64 | * This structure is mapped directly to the kernel spi_transfer structure; | ||
65 | * the fields have the same meanings, except of course that the pointers | ||
66 | * are in a different address space (and may be of different sizes in some | ||
67 | * cases, such as 32-bit i386 userspace over a 64-bit x86_64 kernel). | ||
68 | * Zero-initialize the structure, including currently unused fields, to | ||
69 | * accommodate potential future updates. | ||
70 | * | ||
71 | * SPI_IOC_MESSAGE gives userspace the equivalent of kernel spi_sync(). | ||
72 | * Pass it an array of related transfers, they'll execute together. | ||
73 | * Each transfer may be half duplex (either direction) or full duplex. | ||
74 | * | ||
75 | * struct spi_ioc_transfer mesg[4]; | ||
76 | * ... | ||
77 | * status = ioctl(fd, SPI_IOC_MESSAGE(4), mesg); | ||
78 | * | ||
79 | * So for example one transfer might send a nine bit command (right aligned | ||
80 | * in a 16-bit word), the next could read a block of 8-bit data before | ||
81 | * terminating that command by temporarily deselecting the chip; the next | ||
82 | * could send a different nine bit command (re-selecting the chip), and the | ||
83 | * last transfer might write some register values. | ||
84 | */ | ||
85 | struct spi_ioc_transfer { | ||
86 | __u64 tx_buf; | ||
87 | __u64 rx_buf; | ||
88 | |||
89 | __u32 len; | ||
90 | __u32 speed_hz; | ||
91 | |||
92 | __u16 delay_usecs; | ||
93 | __u8 bits_per_word; | ||
94 | __u8 cs_change; | ||
95 | __u32 pad; | ||
96 | |||
97 | /* If the contents of 'struct spi_ioc_transfer' ever change | ||
98 | * incompatibly, then the ioctl number (currently 0) must change; | ||
99 | * ioctls with constant size fields get a bit more in the way of | ||
100 | * error checking than ones (like this) where that field varies. | ||
101 | * | ||
102 | * NOTE: struct layout is the same in 64bit and 32bit userspace. | ||
103 | */ | ||
104 | }; | ||
105 | |||
106 | /* not all platforms use <asm-generic/ioctl.h> or _IOC_TYPECHECK() ... */ | ||
107 | #define SPI_MSGSIZE(N) \ | ||
108 | ((((N)*(sizeof (struct spi_ioc_transfer))) < (1 << _IOC_SIZEBITS)) \ | ||
109 | ? ((N)*(sizeof (struct spi_ioc_transfer))) : 0) | ||
110 | #define SPI_IOC_MESSAGE(N) _IOW(SPI_IOC_MAGIC, 0, char[SPI_MSGSIZE(N)]) | ||
111 | |||
112 | |||
113 | /* Read / Write of SPI mode (SPI_MODE_0..SPI_MODE_3) */ | ||
114 | #define SPI_IOC_RD_MODE _IOR(SPI_IOC_MAGIC, 1, __u8) | ||
115 | #define SPI_IOC_WR_MODE _IOW(SPI_IOC_MAGIC, 1, __u8) | ||
116 | |||
117 | /* Read / Write SPI bit justification */ | ||
118 | #define SPI_IOC_RD_LSB_FIRST _IOR(SPI_IOC_MAGIC, 2, __u8) | ||
119 | #define SPI_IOC_WR_LSB_FIRST _IOW(SPI_IOC_MAGIC, 2, __u8) | ||
120 | |||
121 | /* Read / Write SPI device word length (1..N) */ | ||
122 | #define SPI_IOC_RD_BITS_PER_WORD _IOR(SPI_IOC_MAGIC, 3, __u8) | ||
123 | #define SPI_IOC_WR_BITS_PER_WORD _IOW(SPI_IOC_MAGIC, 3, __u8) | ||
124 | |||
125 | /* Read / Write SPI device default max speed hz */ | ||
126 | #define SPI_IOC_RD_MAX_SPEED_HZ _IOR(SPI_IOC_MAGIC, 4, __u32) | ||
127 | #define SPI_IOC_WR_MAX_SPEED_HZ _IOW(SPI_IOC_MAGIC, 4, __u32) | ||
128 | |||
129 | |||
130 | |||
131 | #endif /* SPIDEV_H */ | ||