kolibrios/contrib/other/uarm/pxa255_UART.h
maxcodehack a03882245a Upload uARM emulator (linux4kolibri)
git-svn-id: svn://kolibrios.org@8327 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-12-05 14:28:30 +00:00

89 lines
2.2 KiB
C
Executable File

#ifndef _PXA255_UART_H_
#define _PXA255_UART_H_
#include "mem.h"
#include "cpu.h"
#include "pxa255_IC.h"
/*
PXA255 UARTs
PXA255 has three. they are identical, but at diff base addresses. this implements one. instanciate more than one of this struct to make all 3 work if needed.
PURRPOSE: this is how linux talks to us :)
by default we read nothing and write nowhere (buffer drains fast into nothingness)
this can be changed by addidng appropriate callbacks
*/
#define PXA255_FFUART_BASE 0x40100000UL
#define PXA255_BTUART_BASE 0x40200000UL
#define PXA255_STUART_BASE 0x40700000UL
#define PXA255_UART_SIZE 0x00010000UL
#define UART_FIFO_DEPTH 64
#define UART_CHAR_BREAK 0x800
#define UART_CHAR_FRAME_ERR 0x400
#define UART_CHAR_PAR_ERR 0x200
#define UART_CHAR_NONE 0x100
typedef UInt16 (*Pxa255UartReadF)(void* userData);
typedef void (*Pxa255UartWriteF)(UInt16 chr, void* userData);
#define UART_FIFO_EMPTY 0xFF
typedef struct{
UInt8 read;
UInt8 write;
UInt16 buf[UART_FIFO_DEPTH];
}UartFifo;
typedef struct{
Pxa255ic* ic;
UInt32 baseAddr;
Pxa255UartReadF readF;
Pxa255UartWriteF writeF;
void* accessFuncsData;
UartFifo TX, RX;
UInt16 transmitShift; //char currently "sending"
UInt16 transmitHolding; //holding register for no-fifo mode
UInt16 receiveHolding; //char just received
UInt8 irq:5;
UInt8 cyclesSinceRecv:3;
UInt8 IER; //interrupt enable register
UInt8 IIR; //interrupt information register
UInt8 FCR; //fifo control register
UInt8 LCR; //line control register
UInt8 LSR; //line status register
UInt8 MCR; //modem control register
UInt8 MSR; //modem status register
UInt8 SPR; //scratchpad register
UInt8 DLL; //divisor latch low
UInt8 DLH; //divior latch high;
UInt8 ISR; //infrared selection register
}Pxa255uart;
Boolean pxa255uartInit(Pxa255uart* uart, ArmMem* physMem, Pxa255ic* ic, UInt32 baseAddr, UInt8 irq);
void pxa255uartProcess(Pxa255uart* uart); //write out data in TX fifo and read data into RX fifo
void pxa255uartSetFuncs(Pxa255uart* uart, Pxa255UartReadF readF, Pxa255UartWriteF writeF, void* userData);
#endif