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cs-protocol.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * cmt-speech interface definitions * * Copyright (C) 2008,2009,2010 Nokia Corporation. All rights reserved. * * Contact: Kai Vehmanen <kai.vehmanen@nokia.com> * Original author: Peter Ujfalusi <peter.ujfalusi@nokia.com> */ #ifndef _CS_PROTOCOL_H #define _CS_PROTOCOL_H #include <linux/types.h> #include <linux/ioctl.h> /* chardev parameters */ #define CS_DEV_FILE_NAME "/dev/cmt_speech" /* user-space API versioning */ #define CS_IF_VERSION 2 /* APE kernel <-> user space messages */ #define CS_CMD_SHIFT 28 #define CS_DOMAIN_SHIFT 24 #define CS_CMD_MASK 0xff000000 #define CS_PARAM_MASK 0xffffff #define CS_CMD(id, dom) \ (((id) << CS_CMD_SHIFT) | ((dom) << CS_DOMAIN_SHIFT)) #define CS_ERROR CS_CMD(1, 0) #define CS_RX_DATA_RECEIVED CS_CMD(2, 0) #define CS_TX_DATA_READY CS_CMD(3, 0) #define CS_TX_DATA_SENT CS_CMD(4, 0) /* params to CS_ERROR indication */ #define CS_ERR_PEER_RESET 0 /* ioctl interface */ /* parameters to CS_CONFIG_BUFS ioctl */ #define CS_FEAT_TSTAMP_RX_CTRL (1 << 0) #define CS_FEAT_ROLLING_RX_COUNTER (2 << 0) /* parameters to CS_GET_STATE ioctl */ #define CS_STATE_CLOSED 0 #define CS_STATE_OPENED 1 /* resource allocated */ #define CS_STATE_CONFIGURED 2 /* data path active */ /* maximum number of TX/RX buffers */ #define CS_MAX_BUFFERS_SHIFT 4 #define CS_MAX_BUFFERS (1 << CS_MAX_BUFFERS_SHIFT) /* Parameters for setting up the data buffers */ struct cs_buffer_config { __u32 rx_bufs; /* number of RX buffer slots */ __u32 tx_bufs; /* number of TX buffer slots */ __u32 buf_size; /* bytes */ __u32 flags; /* see CS_FEAT_* */ __u32 reserved[4]; }; /* * struct for monotonic timestamp taken when the * last control command was received */ struct cs_timestamp { __u32 tv_sec; /* seconds */ __u32 tv_nsec; /* nanoseconds */ }; /* * Struct describing the layout and contents of the driver mmap area. * This information is meant as read-only information for the application. */ struct cs_mmap_config_block { __u32 reserved1; __u32 buf_size; /* 0=disabled, otherwise the transfer size */ __u32 rx_bufs; /* # of RX buffers */ __u32 tx_bufs; /* # of TX buffers */ __u32 reserved2; /* array of offsets within the mmap area for each RX and TX buffer */ __u32 rx_offsets[CS_MAX_BUFFERS]; __u32 tx_offsets[CS_MAX_BUFFERS]; __u32 rx_ptr; __u32 rx_ptr_boundary; __u32 reserved3[2]; /* enabled with CS_FEAT_TSTAMP_RX_CTRL */ struct cs_timestamp tstamp_rx_ctrl; }; #define CS_IO_MAGIC 'C' #define CS_IOW(num, dtype) _IOW(CS_IO_MAGIC, num, dtype) #define CS_IOR(num, dtype) _IOR(CS_IO_MAGIC, num, dtype) #define CS_IOWR(num, dtype) _IOWR(CS_IO_MAGIC, num, dtype) #define CS_IO(num) _IO(CS_IO_MAGIC, num) #define CS_GET_STATE CS_IOR(21, unsigned int) #define CS_SET_WAKELINE CS_IOW(23, unsigned int) #define CS_GET_IF_VERSION CS_IOR(30, unsigned int) #define CS_CONFIG_BUFS CS_IOW(31, struct cs_buffer_config) #endif /* _CS_PROTOCOL_H */