diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-13 16:26:39 -0400 |
|---|---|---|
| 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 */ | ||
