include/uapi/linux/hsi/cs-protocol.h

   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 */