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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/hsi/cs-protocol.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 /*
  3  * cmt-speech interface definitions
  4  *
  5  * Copyright (C) 2008,2009,2010 Nokia Corporation. All rights reserved.
  6  *
  7  * Contact: Kai Vehmanen <kai.vehmanen@nokia.com>
  8  * Original author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
  9  *
 10  * This program is free software; you can redistribute it and/or
 11  * modify it under the terms of the GNU General Public License
 12  * version 2 as published by the Free Software Foundation.
 13  *
 14  * This program is distributed in the hope that it will be useful, but
 15  * WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17  * General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 22  * 02110-1301 USA
 23  */
 24 
 25 #ifndef _CS_PROTOCOL_H
 26 #define _CS_PROTOCOL_H
 27 
 28 #include <linux/types.h>
 29 #include <linux/ioctl.h>
 30 
 31 /* chardev parameters */
 32 #define CS_DEV_FILE_NAME                "/dev/cmt_speech"
 33 
 34 /* user-space API versioning */
 35 #define CS_IF_VERSION                   2
 36 
 37 /* APE kernel <-> user space messages */
 38 #define CS_CMD_SHIFT                    28
 39 #define CS_DOMAIN_SHIFT                 24
 40 
 41 #define CS_CMD_MASK                     0xff000000
 42 #define CS_PARAM_MASK                   0xffffff
 43 
 44 #define CS_CMD(id, dom) \
 45         (((id) << CS_CMD_SHIFT) | ((dom) << CS_DOMAIN_SHIFT))
 46 
 47 #define CS_ERROR                        CS_CMD(1, 0)
 48 #define CS_RX_DATA_RECEIVED             CS_CMD(2, 0)
 49 #define CS_TX_DATA_READY                CS_CMD(3, 0)
 50 #define CS_TX_DATA_SENT                 CS_CMD(4, 0)
 51 
 52 /* params to CS_ERROR indication */
 53 #define CS_ERR_PEER_RESET               0
 54 
 55 /* ioctl interface */
 56 
 57 /* parameters to CS_CONFIG_BUFS ioctl */
 58 #define CS_FEAT_TSTAMP_RX_CTRL          (1 << 0)
 59 #define CS_FEAT_ROLLING_RX_COUNTER      (2 << 0)
 60 
 61 /* parameters to CS_GET_STATE ioctl */
 62 #define CS_STATE_CLOSED                 0
 63 #define CS_STATE_OPENED                 1 /* resource allocated */
 64 #define CS_STATE_CONFIGURED             2 /* data path active */
 65 
 66 /* maximum number of TX/RX buffers */
 67 #define CS_MAX_BUFFERS_SHIFT            4
 68 #define CS_MAX_BUFFERS                  (1 << CS_MAX_BUFFERS_SHIFT)
 69 
 70 /* Parameters for setting up the data buffers */
 71 struct cs_buffer_config {
 72         __u32 rx_bufs;  /* number of RX buffer slots */
 73         __u32 tx_bufs;  /* number of TX buffer slots */
 74         __u32 buf_size; /* bytes */
 75         __u32 flags;    /* see CS_FEAT_* */
 76         __u32 reserved[4];
 77 };
 78 
 79 /*
 80  * struct for monotonic timestamp taken when the
 81  * last control command was received
 82  */
 83 struct cs_timestamp {
 84         __u32 tv_sec;  /* seconds */
 85         __u32 tv_nsec; /* nanoseconds */
 86 };
 87 
 88 /*
 89  * Struct describing the layout and contents of the driver mmap area.
 90  * This information is meant as read-only information for the application.
 91  */
 92 struct cs_mmap_config_block {
 93         __u32 reserved1;
 94         __u32 buf_size;         /* 0=disabled, otherwise the transfer size */
 95         __u32 rx_bufs;          /* # of RX buffers */
 96         __u32 tx_bufs;          /* # of TX buffers */
 97         __u32 reserved2;
 98         /* array of offsets within the mmap area for each RX and TX buffer */
 99         __u32 rx_offsets[CS_MAX_BUFFERS];
100         __u32 tx_offsets[CS_MAX_BUFFERS];
101         __u32 rx_ptr;
102         __u32 rx_ptr_boundary;
103         __u32 reserved3[2];
104         /* enabled with CS_FEAT_TSTAMP_RX_CTRL */
105         struct cs_timestamp tstamp_rx_ctrl;
106 };
107 
108 #define CS_IO_MAGIC             'C'
109 
110 #define CS_IOW(num, dtype)      _IOW(CS_IO_MAGIC, num, dtype)
111 #define CS_IOR(num, dtype)      _IOR(CS_IO_MAGIC, num, dtype)
112 #define CS_IOWR(num, dtype)     _IOWR(CS_IO_MAGIC, num, dtype)
113 #define CS_IO(num)              _IO(CS_IO_MAGIC, num)
114 
115 #define CS_GET_STATE            CS_IOR(21, unsigned int)
116 #define CS_SET_WAKELINE         CS_IOW(23, unsigned int)
117 #define CS_GET_IF_VERSION       CS_IOR(30, unsigned int)
118 #define CS_CONFIG_BUFS          CS_IOW(31, struct cs_buffer_config)
119 
120 #endif /* _CS_PROTOCOL_H */
121 

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