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kernel
os
linux
CRIS: Add ARTPEC-3 and timestamps for sync-serial
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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arch/cris/include/asm/sync_serial.h
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arch/cris/include/asm/sync_serial.h
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#define SSP_OPOLARITY _IOR('S', 4, unsigned int)
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#define SSP_SPI _IOR('S', 5, unsigned int)
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#define SSP_INBUFCHUNK _IOR('S', 6, unsigned int)
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#define SSP_INPUT _IOR('S', 7, unsigned int)
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/* Values for SSP_SPEED */
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#define SSP150 0
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#define SSP921600 13
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#define SSP3125000 14
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#define CODEC 15
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#define CODEC_f32768 16
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#define FREQ_4MHz 0
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#define FREQ_2MHz 1
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#define FREQ_128kHz 5
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#define FREQ_64kHz 6
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#define FREQ_32kHz 7
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/* FREQ_* with values where bit (value & 0x10) is set are */
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/* used for CODEC_f32768 */
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#define FREQ_4096kHz 16 /* CODEC_f32768 */
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/* Used by application to set CODEC divider, word rate and frame rate */
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#define CODEC_VAL(freq, clk_per_sync, sync_per_frame) (CODEC | (freq << 8) | (clk_per_sync << 16) | (sync_per_frame << 28))
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#define CODEC_VAL(freq, clk_per_sync, sync_per_frame) \
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((CODEC + ((freq & 0x10) >> 4)) | (freq << 8) | \
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(clk_per_sync << 16) | (sync_per_frame << 28))
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/* Used by driver to extract speed */
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#define GET_SPEED(x) (x & 0xff)
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#define NORMAL_SYNC 1
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#define EARLY_SYNC 2
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#define SECOND_WORD_SYNC 0x40000
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#define LATE_SYNC 0x80000
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#define BIT_SYNC 4
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#define WORD_SYNC 8
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/* Values for SSP_INBUFCHUNK */
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/* plain integer with the size of DMA chunks */
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/* To ensure that the timestamps are aligned with the data being read
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* the read length MUST be a multiple of the length of the DMA buffers.
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*
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* Use a multiple of SSP_INPUT_CHUNK_SIZE defined below.
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*/
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#define SSP_INPUT_CHUNK_SIZE 256
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/* Request struct to pass through the ioctl interface to read
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* data with timestamps.
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*/
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struct ssp_request {
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char __user *buf; /* Where to put the data. */
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size_t len; /* Size of buf. MUST be a multiple of */
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/* SSP_INPUT_CHUNK_SIZE! */
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struct timespec ts; /* The time the data was sampled. */
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};
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#endif