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 */ 125struct 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