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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | /** * Copyright (c) 2015-2016 Google Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of the copyright holder nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This is a special protocol for configuring communication over the * I2S bus between the DSP on the MSM8994 and APBridgeA. Therefore, * we can predefine several low-level attributes of the communication * because we know that they are supported. In particular, the following * assumptions are made: * - there are two channels (i.e., stereo) * - the low-level protocol is I2S as defined by Philips/NXP * - the DSP on the MSM8994 is the clock master for MCLK, BCLK, and WCLK * - WCLK changes on the falling edge of BCLK * - WCLK low for left channel; high for right channel * - TX data is sent on the falling edge of BCLK * - RX data is received/latched on the rising edge of BCLK */ #ifndef __AUDIO_APBRIDGEA_H #define __AUDIO_APBRIDGEA_H #define AUDIO_APBRIDGEA_TYPE_SET_CONFIG 0x01 #define AUDIO_APBRIDGEA_TYPE_REGISTER_CPORT 0x02 #define AUDIO_APBRIDGEA_TYPE_UNREGISTER_CPORT 0x03 #define AUDIO_APBRIDGEA_TYPE_SET_TX_DATA_SIZE 0x04 /* 0x05 unused */ #define AUDIO_APBRIDGEA_TYPE_PREPARE_TX 0x06 #define AUDIO_APBRIDGEA_TYPE_START_TX 0x07 #define AUDIO_APBRIDGEA_TYPE_STOP_TX 0x08 #define AUDIO_APBRIDGEA_TYPE_SHUTDOWN_TX 0x09 #define AUDIO_APBRIDGEA_TYPE_SET_RX_DATA_SIZE 0x0a /* 0x0b unused */ #define AUDIO_APBRIDGEA_TYPE_PREPARE_RX 0x0c #define AUDIO_APBRIDGEA_TYPE_START_RX 0x0d #define AUDIO_APBRIDGEA_TYPE_STOP_RX 0x0e #define AUDIO_APBRIDGEA_TYPE_SHUTDOWN_RX 0x0f #define AUDIO_APBRIDGEA_PCM_FMT_8 BIT(0) #define AUDIO_APBRIDGEA_PCM_FMT_16 BIT(1) #define AUDIO_APBRIDGEA_PCM_FMT_24 BIT(2) #define AUDIO_APBRIDGEA_PCM_FMT_32 BIT(3) #define AUDIO_APBRIDGEA_PCM_FMT_64 BIT(4) #define AUDIO_APBRIDGEA_PCM_RATE_5512 BIT(0) #define AUDIO_APBRIDGEA_PCM_RATE_8000 BIT(1) #define AUDIO_APBRIDGEA_PCM_RATE_11025 BIT(2) #define AUDIO_APBRIDGEA_PCM_RATE_16000 BIT(3) #define AUDIO_APBRIDGEA_PCM_RATE_22050 BIT(4) #define AUDIO_APBRIDGEA_PCM_RATE_32000 BIT(5) #define AUDIO_APBRIDGEA_PCM_RATE_44100 BIT(6) #define AUDIO_APBRIDGEA_PCM_RATE_48000 BIT(7) #define AUDIO_APBRIDGEA_PCM_RATE_64000 BIT(8) #define AUDIO_APBRIDGEA_PCM_RATE_88200 BIT(9) #define AUDIO_APBRIDGEA_PCM_RATE_96000 BIT(10) #define AUDIO_APBRIDGEA_PCM_RATE_176400 BIT(11) #define AUDIO_APBRIDGEA_PCM_RATE_192000 BIT(12) #define AUDIO_APBRIDGEA_DIRECTION_TX BIT(0) #define AUDIO_APBRIDGEA_DIRECTION_RX BIT(1) /* The I2S port is passed in the 'index' parameter of the USB request */ /* The CPort is passed in the 'value' parameter of the USB request */ struct audio_apbridgea_hdr { __u8 type; __le16 i2s_port; __u8 data[0]; } __packed; struct audio_apbridgea_set_config_request { struct audio_apbridgea_hdr hdr; __le32 format; /* AUDIO_APBRIDGEA_PCM_FMT_* */ __le32 rate; /* AUDIO_APBRIDGEA_PCM_RATE_* */ __le32 mclk_freq; /* XXX Remove? */ } __packed; struct audio_apbridgea_register_cport_request { struct audio_apbridgea_hdr hdr; __le16 cport; __u8 direction; } __packed; struct audio_apbridgea_unregister_cport_request { struct audio_apbridgea_hdr hdr; __le16 cport; __u8 direction; } __packed; struct audio_apbridgea_set_tx_data_size_request { struct audio_apbridgea_hdr hdr; __le16 size; } __packed; struct audio_apbridgea_prepare_tx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_start_tx_request { struct audio_apbridgea_hdr hdr; __le64 timestamp; } __packed; struct audio_apbridgea_stop_tx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_shutdown_tx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_set_rx_data_size_request { struct audio_apbridgea_hdr hdr; __le16 size; } __packed; struct audio_apbridgea_prepare_rx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_start_rx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_stop_rx_request { struct audio_apbridgea_hdr hdr; } __packed; struct audio_apbridgea_shutdown_rx_request { struct audio_apbridgea_hdr hdr; } __packed; #endif /*__AUDIO_APBRIDGEA_H */ |