1 /* 2 * ioctl defines for synchronous serial port driver 3 * 4 * Copyright (c) 2001-2003 Axis Communications AB 5 * 6 * Author: Mikael Starvik 7 * 8 */ 9 10 #ifndef SYNC_SERIAL_H 11 #define SYNC_SERIAL_H 12 13 #include <linux/ioctl.h> 14 15 #define SSP_SPEED _IOR('S', 0, unsigned int) 16 #define SSP_MODE _IOR('S', 1, unsigned int) 17 #define SSP_FRAME_SYNC _IOR('S', 2, unsigned int) 18 #define SSP_IPOLARITY _IOR('S', 3, unsigned int) 19 #define SSP_OPOLARITY _IOR('S', 4, unsigned int) 20 #define SSP_SPI _IOR('S', 5, unsigned int) 21 #define SSP_INBUFCHUNK _IOR('S', 6, unsigned int) 22 #define SSP_INPUT _IOR('S', 7, unsigned int) 23 24 /* Values for SSP_SPEED */ 25 #define SSP150 0 26 #define SSP300 1 27 #define SSP600 2 28 #define SSP1200 3 29 #define SSP2400 4 30 #define SSP4800 5 31 #define SSP9600 6 32 #define SSP19200 7 33 #define SSP28800 8 34 #define SSP57600 9 35 #define SSP115200 10 36 #define SSP230400 11 37 #define SSP460800 12 38 #define SSP921600 13 39 #define SSP3125000 14 40 #define CODEC 15 41 #define CODEC_f32768 16 42 43 #define FREQ_4MHz 0 44 #define FREQ_2MHz 1 45 #define FREQ_1MHz 2 46 #define FREQ_512kHz 3 47 #define FREQ_256kHz 4 48 #define FREQ_128kHz 5 49 #define FREQ_64kHz 6 50 #define FREQ_32kHz 7 51 /* FREQ_* with values where bit (value & 0x10) is set are */ 52 /* used for CODEC_f32768 */ 53 #define FREQ_4096kHz 16 /* CODEC_f32768 */ 54 55 /* Used by application to set CODEC divider, word rate and frame rate */ 56 #define CODEC_VAL(freq, clk_per_sync, sync_per_frame) \ 57 ((CODEC + ((freq & 0x10) >> 4)) | (freq << 8) | \ 58 (clk_per_sync << 16) | (sync_per_frame << 28)) 59 60 /* Used by driver to extract speed */ 61 #define GET_SPEED(x) (x & 0xff) 62 #define GET_FREQ(x) ((x & 0xff00) >> 8) 63 #define GET_WORD_RATE(x) (((x & 0x0fff0000) >> 16) - 1) 64 #define GET_FRAME_RATE(x) (((x & 0xf0000000) >> 28) - 1) 65 66 /* Values for SSP_MODE */ 67 #define MASTER_OUTPUT 0 68 #define SLAVE_OUTPUT 1 69 #define MASTER_INPUT 2 70 #define SLAVE_INPUT 3 71 #define MASTER_BIDIR 4 72 #define SLAVE_BIDIR 5 73 74 /* Values for SSP_FRAME_SYNC */ 75 #define NORMAL_SYNC 1 76 #define EARLY_SYNC 2 77 #define SECOND_WORD_SYNC 0x40000 78 #define LATE_SYNC 0x80000 79 80 #define BIT_SYNC 4 81 #define WORD_SYNC 8 82 #define EXTENDED_SYNC 0x10 83 84 #define SYNC_OFF 0x20 85 #define SYNC_ON 0x40 86 #define WORD_SIZE_8 0x80 87 #define WORD_SIZE_12 0x100 88 #define WORD_SIZE_16 0x200 89 #define WORD_SIZE_24 0x400 90 #define WORD_SIZE_32 0x800 91 #define BIT_ORDER_LSB 0x1000 92 #define BIT_ORDER_MSB 0x2000 93 #define FLOW_CONTROL_ENABLE 0x4000 94 #define FLOW_CONTROL_DISABLE 0x8000 95 #define CLOCK_GATED 0x10000 96 #define CLOCK_NOT_GATED 0x20000 97 98 /* Values for SSP_IPOLARITY and SSP_OPOLARITY */ 99 #define CLOCK_NORMAL 1 100 #define CLOCK_INVERT 2 101 #define CLOCK_INEGEDGE CLOCK_NORMAL 102 #define CLOCK_IPOSEDGE CLOCK_INVERT 103 #define FRAME_NORMAL 4 104 #define FRAME_INVERT 8 105 #define STATUS_NORMAL 0x10 106 #define STATUS_INVERT 0x20 107 108 /* Values for SSP_SPI */ 109 #define SPI_MASTER 0 110 #define SPI_SLAVE 1 111 112 /* Values for SSP_INBUFCHUNK */ 113 /* plain integer with the size of DMA chunks */ 114 115 /* To ensure that the timestamps are aligned with the data being read 116 * the read length MUST be a multiple of the length of the DMA buffers. 117 * 118 * Use a multiple of SSP_INPUT_CHUNK_SIZE defined below. 119 */ 120 #define SSP_INPUT_CHUNK_SIZE 256 121 122 /* Request struct to pass through the ioctl interface to read 123 * data with timestamps. 124 */ 125 struct ssp_request { 126 char __user *buf; /* Where to put the data. */ 127 size_t len; /* Size of buf. MUST be a multiple of */ 128 /* SSP_INPUT_CHUNK_SIZE! */ 129 struct timespec ts; /* The time the data was sampled. */ 130 }; 131 132 #endif 133