diff options
Diffstat (limited to 'tools/pkg/0/mlibc/linux-headers/linux/i2c.h')
| -rw-r--r-- | tools/pkg/0/mlibc/linux-headers/linux/i2c.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/tools/pkg/0/mlibc/linux-headers/linux/i2c.h b/tools/pkg/0/mlibc/linux-headers/linux/i2c.h deleted file mode 100644 index ef0e487..0000000 --- a/tools/pkg/0/mlibc/linux-headers/linux/i2c.h +++ /dev/null @@ -1,165 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ -/* - * i2c.h - definitions for the I2C bus interface - * - * Copyright (C) 1995-2000 Simon G. Vogl - * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and - * Frodo Looijaard <frodol@dds.nl> - */ - -#ifndef _LINUX_I2C_H -#define _LINUX_I2C_H - -#include <linux/types.h> - -/** - * struct i2c_msg - an I2C transaction segment beginning with START - * - * @addr: Slave address, either 7 or 10 bits. When this is a 10 bit address, - * %I2C_M_TEN must be set in @flags and the adapter must support - * %I2C_FUNC_10BIT_ADDR. - * - * @flags: - * Supported by all adapters: - * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001! If - * not set, the transaction is interpreted as write. - * - * Optional: - * %I2C_M_DMA_SAFE: the buffer of this message is DMA safe. Makes only sense - * in kernelspace, because userspace buffers are copied anyway - * - * Only if I2C_FUNC_10BIT_ADDR is set: - * %I2C_M_TEN: this is a 10 bit chip address - * - * Only if I2C_FUNC_SMBUS_READ_BLOCK_DATA is set: - * %I2C_M_RECV_LEN: message length will be first received byte - * - * Only if I2C_FUNC_NOSTART is set: - * %I2C_M_NOSTART: skip repeated start sequence - - * Only if I2C_FUNC_PROTOCOL_MANGLING is set: - * %I2C_M_NO_RD_ACK: in a read message, master ACK/NACK bit is skipped - * %I2C_M_IGNORE_NAK: treat NACK from client as ACK - * %I2C_M_REV_DIR_ADDR: toggles the Rd/Wr bit - * %I2C_M_STOP: force a STOP condition after the message - * - * @len: Number of data bytes in @buf being read from or written to the I2C - * slave address. For read transactions where %I2C_M_RECV_LEN is set, the - * caller guarantees that this buffer can hold up to %I2C_SMBUS_BLOCK_MAX - * bytes in addition to the initial length byte sent by the slave (plus, - * if used, the SMBus PEC); and this value will be incremented by the number - * of block data bytes received. - * - * @buf: The buffer into which data is read, or from which it's written. - * - * An i2c_msg is the low level representation of one segment of an I2C - * transaction. It is visible to drivers in the @i2c_transfer() procedure, - * to userspace from i2c-dev, and to I2C adapter drivers through the - * @i2c_adapter.@master_xfer() method. - * - * Except when I2C "protocol mangling" is used, all I2C adapters implement - * the standard rules for I2C transactions. Each transaction begins with a - * START. That is followed by the slave address, and a bit encoding read - * versus write. Then follow all the data bytes, possibly including a byte - * with SMBus PEC. The transfer terminates with a NAK, or when all those - * bytes have been transferred and ACKed. If this is the last message in a - * group, it is followed by a STOP. Otherwise it is followed by the next - * @i2c_msg transaction segment, beginning with a (repeated) START. - * - * Alternatively, when the adapter supports %I2C_FUNC_PROTOCOL_MANGLING then - * passing certain @flags may have changed those standard protocol behaviors. - * Those flags are only for use with broken/nonconforming slaves, and with - * adapters which are known to support the specific mangling options they need. - */ -struct i2c_msg { - __u16 addr; - __u16 flags; -#define I2C_M_RD 0x0001 /* guaranteed to be 0x0001! */ -#define I2C_M_TEN 0x0010 /* use only if I2C_FUNC_10BIT_ADDR */ -#define I2C_M_DMA_SAFE 0x0200 /* use only in kernel space */ -#define I2C_M_RECV_LEN 0x0400 /* use only if I2C_FUNC_SMBUS_READ_BLOCK_DATA */ -#define I2C_M_NO_RD_ACK 0x0800 /* use only if I2C_FUNC_PROTOCOL_MANGLING */ -#define I2C_M_IGNORE_NAK 0x1000 /* use only if I2C_FUNC_PROTOCOL_MANGLING */ -#define I2C_M_REV_DIR_ADDR 0x2000 /* use only if I2C_FUNC_PROTOCOL_MANGLING */ -#define I2C_M_NOSTART 0x4000 /* use only if I2C_FUNC_NOSTART */ -#define I2C_M_STOP 0x8000 /* use only if I2C_FUNC_PROTOCOL_MANGLING */ - __u16 len; - __u8 *buf; -}; - -/* To determine what functionality is present */ - -#define I2C_FUNC_I2C 0x00000001 -#define I2C_FUNC_10BIT_ADDR 0x00000002 /* required for I2C_M_TEN */ -#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* required for I2C_M_IGNORE_NAK etc. */ -#define I2C_FUNC_SMBUS_PEC 0x00000008 -#define I2C_FUNC_NOSTART 0x00000010 /* required for I2C_M_NOSTART */ -#define I2C_FUNC_SLAVE 0x00000020 -#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 or later */ -#define I2C_FUNC_SMBUS_QUICK 0x00010000 -#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000 -#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000 -#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000 -#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000 -#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000 -#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000 -#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000 -#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000 /* required for I2C_M_RECV_LEN */ -#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000 -#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */ -#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */ -#define I2C_FUNC_SMBUS_HOST_NOTIFY 0x10000000 /* SMBus 2.0 or later */ - -#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \ - I2C_FUNC_SMBUS_WRITE_BYTE) -#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \ - I2C_FUNC_SMBUS_WRITE_BYTE_DATA) -#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \ - I2C_FUNC_SMBUS_WRITE_WORD_DATA) -#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \ - I2C_FUNC_SMBUS_WRITE_BLOCK_DATA) -#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \ - I2C_FUNC_SMBUS_WRITE_I2C_BLOCK) - -#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \ - I2C_FUNC_SMBUS_BYTE | \ - I2C_FUNC_SMBUS_BYTE_DATA | \ - I2C_FUNC_SMBUS_WORD_DATA | \ - I2C_FUNC_SMBUS_PROC_CALL | \ - I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \ - I2C_FUNC_SMBUS_I2C_BLOCK | \ - I2C_FUNC_SMBUS_PEC) - -/* if I2C_M_RECV_LEN is also supported */ -#define I2C_FUNC_SMBUS_EMUL_ALL (I2C_FUNC_SMBUS_EMUL | \ - I2C_FUNC_SMBUS_READ_BLOCK_DATA | \ - I2C_FUNC_SMBUS_BLOCK_PROC_CALL) - -/* - * Data for SMBus Messages - */ -#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */ -union i2c_smbus_data { - __u8 byte; - __u16 word; - __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */ - /* and one more for user-space compatibility */ -}; - -/* i2c_smbus_xfer read or write markers */ -#define I2C_SMBUS_READ 1 -#define I2C_SMBUS_WRITE 0 - -/* SMBus transaction types (size parameter in the above functions) - Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */ -#define I2C_SMBUS_QUICK 0 -#define I2C_SMBUS_BYTE 1 -#define I2C_SMBUS_BYTE_DATA 2 -#define I2C_SMBUS_WORD_DATA 3 -#define I2C_SMBUS_PROC_CALL 4 -#define I2C_SMBUS_BLOCK_DATA 5 -#define I2C_SMBUS_I2C_BLOCK_BROKEN 6 -#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */ -#define I2C_SMBUS_I2C_BLOCK_DATA 8 - -#endif /* _LINUX_I2C_H */ |