201 lines
6.8 KiB
C
201 lines
6.8 KiB
C
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/*
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Part of the Raspberry-Pi Bare Metal Tutorials
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Copyright (c) 2013-2015, Brian Sidebotham
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RPI_AUX_H
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#define RPI_AUX_H
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#include "rpi-base.h"
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/* Although these values were originally from the BCM2835 Arm peripherals PDF
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it's clear that was rushed and has some glaring errors - so these values
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may appear to be different. These values have been changed due to data on
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the elinux BCM2835 datasheet errata:
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http://elinux.org/BCM2835_datasheet_errata */
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#define AUX_BASE ( PERIPHERAL_BASE + 0x215000 )
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#define AUX_ENA_MINIUART ( 1 << 0 )
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#define AUX_ENA_SPI1 ( 1 << 1 )
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#define AUX_ENA_SPI2 ( 1 << 2 )
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#define AUX_IRQ_SPI2 ( 1 << 2 )
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#define AUX_IRQ_SPI1 ( 1 << 1 )
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#define AUX_IRQ_MU ( 1 << 0 )
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#define AUX_MULCR_8BIT_MODE ( 3 << 0 ) /* See errata for this value */
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#define AUX_MULCR_BREAK ( 1 << 6 )
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#define AUX_MULCR_DLAB_ACCESS ( 1 << 7 )
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#define AUX_MUMCR_RTS ( 1 << 1 )
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#define AUX_MULSR_DATA_READY ( 1 << 0 )
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#define AUX_MULSR_RX_OVERRUN ( 1 << 1 )
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#define AUX_MULSR_TX_EMPTY ( 1 << 5 )
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#define AUX_MULSR_TX_IDLE ( 1 << 6 )
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#define AUX_MUMSR_CTS ( 1 << 5 )
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#define AUX_MUCNTL_RX_ENABLE ( 1 << 0 )
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#define AUX_MUCNTL_TX_ENABLE ( 1 << 1 )
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#define AUX_MUCNTL_RTS_FLOW ( 1 << 2 )
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#define AUX_MUCNTL_CTS_FLOW ( 1 << 3 )
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#define AUX_MUCNTL_RTS_FIFO ( 3 << 4 )
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#define AUX_MUCNTL_RTS_ASSERT ( 1 << 6 )
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#define AUX_MUCNTL_CTS_ASSERT ( 1 << 7 )
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#define AUX_MUSTAT_SYMBOL_AV ( 1 << 0 )
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#define AUX_MUSTAT_SPACE_AV ( 1 << 1 )
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#define AUX_MUSTAT_RX_IDLE ( 1 << 2 )
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#define AUX_MUSTAT_TX_IDLE ( 1 << 3 )
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#define AUX_MUSTAT_RX_OVERRUN ( 1 << 4 )
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#define AUX_MUSTAT_TX_FIFO_FULL ( 1 << 5 )
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#define AUX_MUSTAT_RTS ( 1 << 6 )
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#define AUX_MUSTAT_CTS ( 1 << 7 )
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#define AUX_MUSTAT_TX_EMPTY ( 1 << 8 )
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#define AUX_MUSTAT_TX_DONE ( 1 << 9 )
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#define AUX_MUSTAT_RX_FIFO_LEVEL ( 7 << 16 )
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#define AUX_MUSTAT_TX_FIFO_LEVEL ( 7 << 24 )
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// Interrupt enables are incorrect on page 12 of:
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// https://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf
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// See errata:
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// http://elinux.org/BCM2835_datasheet_errata#p12
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#define AUX_MUIER_TX_INT ( (1 << 1) )
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#define AUX_MUIER_RX_INT ( (1 << 0 )| (1 << 2) )
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#define AUX_MUIIR_INT_NOT_PENDING ( 1 << 0 )
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#define AUX_MUIIR_INT_IS_TX ( 1 << 1 )
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#define AUX_MUIIR_INT_IS_RX ( 1 << 2 )
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#define FSEL0(x) ( x )
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#define FSEL1(x) ( x << 3 )
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#define FSEL2(x) ( x << 6 )
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#define FSEL3(x) ( x << 9 )
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#define FSEL4(x) ( x << 12 )
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#define FSEL5(x) ( x << 15 )
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#define FSEL6(x) ( x << 18 )
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#define FSEL7(x) ( x << 21 )
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#define FSEL8(x) ( x << 24 )
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#define FSEL9(x) ( x << 27 )
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#define FSEL10(x) ( x )
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#define FSEL11(x) ( x << 3 )
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#define FSEL12(x) ( x << 6 )
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#define FSEL13(x) ( x << 9 )
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#define FSEL14(x) ( x << 12 )
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#define FSEL15(x) ( x << 15 )
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#define FSEL16(x) ( x << 18 )
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#define FSEL17(x) ( x << 21 )
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#define FSEL18(x) ( x << 24 )
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#define FSEL19(x) ( x << 27 )
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#define FSEL20(x) ( x )
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#define FSEL21(x) ( x << 3 )
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#define FSEL22(x) ( x << 6 )
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#define FSEL23(x) ( x << 9 )
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#define FSEL24(x) ( x << 12 )
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#define FSEL25(x) ( x << 15 )
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#define FSEL26(x) ( x << 18 )
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#define FSEL27(x) ( x << 21 )
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#define FSEL28(x) ( x << 24 )
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#define FSEL29(x) ( x << 27 )
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#define FSEL30(x) ( x )
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#define FSEL31(x) ( x << 3 )
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#define FSEL32(x) ( x << 6 )
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#define FSEL33(x) ( x << 9 )
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#define FSEL34(x) ( x << 12 )
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#define FSEL35(x) ( x << 15 )
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#define FSEL36(x) ( x << 18 )
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#define FSEL37(x) ( x << 21 )
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#define FSEL38(x) ( x << 24 )
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#define FSEL39(x) ( x << 27 )
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#define FSEL40(x) ( x )
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#define FSEL41(x) ( x << 3 )
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#define FSEL42(x) ( x << 6 )
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#define FSEL43(x) ( x << 9 )
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#define FSEL44(x) ( x << 12 )
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#define FSEL45(x) ( x << 15 )
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#define FSEL46(x) ( x << 18 )
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#define FSEL47(x) ( x << 21 )
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#define FSEL48(x) ( x << 24 )
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#define FSEL49(x) ( x << 27 )
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#define FSEL50(x) ( x )
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#define FSEL51(x) ( x << 3 )
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#define FSEL52(x) ( x << 6 )
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#define FSEL53(x) ( x << 9 )
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typedef struct
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{
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volatile unsigned int IRQ;
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volatile unsigned int ENABLES;
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volatile unsigned int reserved1[((0x40 - 0x04) / 4) - 1];
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volatile unsigned int MU_IO;
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volatile unsigned int MU_IER;
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volatile unsigned int MU_IIR;
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volatile unsigned int MU_LCR;
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volatile unsigned int MU_MCR;
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volatile unsigned int MU_LSR;
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volatile unsigned int MU_MSR;
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volatile unsigned int MU_SCRATCH;
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volatile unsigned int MU_CNTL;
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volatile unsigned int MU_STAT;
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volatile unsigned int MU_BAUD;
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volatile unsigned int reserved2[(0x80 - 0x68) / 4];
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volatile unsigned int SPI0_CNTL0;
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volatile unsigned int SPI0_CNTL1;
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volatile unsigned int SPI0_STAT;
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volatile unsigned int SPI0_IO;
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volatile unsigned int SPI0_PEEK;
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volatile unsigned int reserved3[(0xC0 - 0x94) / 4];
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volatile unsigned int SPI1_CNTL0;
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volatile unsigned int SPI1_CNTL1;
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volatile unsigned int SPI1_STAT;
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volatile unsigned int SPI1_IO;
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volatile unsigned int SPI1_PEEK;
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} aux_t;
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extern aux_t* RPI_GetAux(void);
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extern void RPI_AuxMiniUartInit(int baud, int bits);
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extern void RPI_AuxMiniUartWrite(char c);
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extern void RPI_EnableUart(char* pMessage);
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#endif
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