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pcm.h
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pcm.h
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/*
* pcm.h
*
* Copyright (c) 2014 Jeremy Garff <jer @ jers.net>
* PCM version Copyright (c) Ton van Overbeek <tvoverbeek @ gmail.com>
*
* 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 owner 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 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.
*
*/
#ifndef __PCM_H__
#define __PCM_H__
#include <stdint.h>
/*
*
* Pin mapping of alternate pin configuration for PCM
*
* GPIO ALT PCM_CLK ALT PCM-FS ALT PCM_DIN ALT PCM_DOUT
*
* 18 0
* 19 0
* 20 0
* 21 0
* 28 2
* 29 2
* 30 2
* 31 2
*
*/
typedef struct
{
uint32_t cs;
#define RPI_PCM_CS_STBY (1 << 25)
#define RPI_PCM_CS_SYNC (1 << 24)
#define RPI_PCM_CS_RXSEX (1 << 23)
#define RPI_PCM_CS_RXF (1 << 22)
#define RPI_PCM_CS_TXE (1 << 21)
#define RPI_PCM_CS_RXD (1 << 20)
#define RPI_PCM_CS_TXD (1 << 19)
#define RPI_PCM_CS_RXR (1 << 18)
#define RPI_PCM_CS_TXW (1 << 17)
#define RPI_PCM_CS_RXERR (1 << 16)
#define RPI_PCM_CS_TXERR (1 << 15)
#define RPI_PCM_CS_RXSYNC (1 << 14)
#define RPI_PCM_CS_TXSYNC (1 << 13)
#define RPI_PCM_CS_DMAEN (1 << 9)
#define RPI_PCM_CS_RXTHR(val) ((val & 0x03) << 7)
#define RPI_PCM_CS_TXTHR(val) ((val & 0x03) << 5)
#define RPI_PCM_CS_RXCLR (1 << 4)
#define RPI_PCM_CS_TXCLR (1 << 3)
#define RPI_PCM_CS_TXON (1 << 2)
#define RPI_PCM_CS_RXON (1 << 1)
#define RPI_PCM_CS_EN (1 << 0)
uint32_t fifo;
uint32_t mode;
#define RPI_PCM_MODE_CLK_DIS (1 << 28)
#define RPI_PCM_MODE_PDMN (1 << 27)
#define RPI_PCM_MODE_PDME (1 << 26)
#define RPI_PCM_MODE_FRXP (1 << 25)
#define RPI_PCM_MODE_FTXP (1 << 24)
#define RPI_PCM_MODE_CLKM (1 << 23)
#define RPI_PCM_MODE_CLKI (1 << 22)
#define RPI_PCM_MODE_FSM (1 << 21)
#define RPI_PCM_MODE_FSI (1 << 20)
#define RPI_PCM_MODE_FLEN(val) ((val & 0x3ff) << 10)
#define RPI_PCM_MODE_FSLEN(val) ((val & 0x3ff) << 0)
uint32_t rxc;
#define RPI_PCM_RXC_CH1WEX (1 << 31)
#define RPI_PCM_RXC_CH1EN (1 << 30)
#define RPI_PCM_RXC_CH1POS(val) ((val & 0x3ff) << 20)
#define RPI_PCM_RXC_CH1WID(val) ((val & 0x0f) << 16)
#define RPI_PCM_RXC_CH2WEX (1 << 15)
#define RPI_PCM_RXC_CH2EN (1 << 14)
#define RPI_PCM_RXC_CH2POS(val) ((val & 0x3ff) << 4)
#define RPI_PCM_RXC_CH2WID(val) ((val & 0x0f) << 0)
uint32_t txc;
#define RPI_PCM_TXC_CH1WEX (1 << 31)
#define RPI_PCM_TXC_CH1EN (1 << 30)
#define RPI_PCM_TXC_CH1POS(val) ((val & 0x3ff) << 20)
#define RPI_PCM_TXC_CH1WID(val) ((val & 0x0f) << 16)
#define RPI_PCM_TXC_CH2WEX (1 << 15)
#define RPI_PCM_TXC_CH2EN (1 << 14)
#define RPI_PCM_TXC_CH2POS(val) ((val & 0x3ff) << 4)
#define RPI_PCM_TXC_CH2WID(val) ((val & 0x0f) << 0)
uint32_t dreq;
#define RPI_PCM_DREQ_TX_PANIC(val) ((val & 0x7f) << 24)
#define RPI_PCM_DREQ_RX_PANIC(val) ((val & 0x7f) << 16)
#define RPI_PCM_DREQ_TX(val) ((val & 0x7f) << 8)
#define RPI_PCM_DREQ_RX(val) ((val & 0x7f) << 0)
uint32_t inten;
#define RPI_PCM_INTEN_RXERR (1 << 3)
#define RPI_PCM_INTEN_TXERR (1 << 2)
#define RPI_PCM_INTEN_RXR (1 << 1)
#define RPI_PCM_INTEN_TXW (1 << 0)
uint32_t intstc;
#define RPI_PCM_INTSTC_RXERR (1 << 3)
#define RPI_PCM_INTSTC_TXERR (1 << 2)
#define RPI_PCM_INTSTC_RXR (1 << 1)
#define RPI_PCM_INTSTC_TXW (1 << 0)
uint32_t gray;
#define RPI_PCM_GRAY_RXFIFOLEVEL(val) ((val & 0x3f) << 16)
#define RPI_PCM_GRAY_FLUSHED(val) ((val & 0x3f) << 10
#define RPI_PCM_GRAY_RXLEVEL(val) ((val & 0x3f) << 4)
#define RPI_PCM_GRAY_FLUSH (1 << 2)
#define RPI_PCM_GRAY_CLR (1 << 1)
#define RPI_PCM_GRAY_EN (1 << 0)
} __attribute__((packed, aligned(4))) pcm_t;
#define PCM_OFFSET (0x00203000)
#define PCM_PERIPH_PHYS (0x7e203000)
#define NUM_PCMFUNS 4
#define PCMFUN_CLK 0
#define PCMFUN_FS 1
#define PCMFUN_DIN 2
#define PCMFUN_DOUT 3
typedef struct
{
int pinnum;
int altnum;
} pcm_pin_table_t;
typedef struct
{
const int count;
const pcm_pin_table_t *pins;
} pcm_pin_tables_t;
int pcm_pin_alt(int pcmfun, int pinnum);
#endif /* __PCM_H__ */