sio.h

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# (c) 2003 Marcus R. Brown <mrbrown@0xd6.org>
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#ifndef __SIO_H__
#define __SIO_H__
 
#include <tamtypes.h>
#include <stddef.h>
 
/* SIO Registers.  */
/* Most of these are based off of Toshiba documentation for the TX49 and the
   TX79 companion chip. However, looking at the kernel SIOP (Debug) exception
   handler, it looks like some registers are borrowed from the TX7901 UART
   (0x1000f110 or LSR, in particular). I'm still trying to find the correct
   register names and values.  */
#define SIO_LCR         0x1000f100
#define   SIO_LCR_UMODE_8BIT 0x00
#define   SIO_LCR_UMODE_7BIT 0x01
#define   SIO_LCR_USBL_1BIT  0x00
#define   SIO_LCR_USBL_2BITS 0x01
#define   SIO_LCR_UPEN_OFF   0x00
#define   SIO_LCR_UPEN_ON    0x01
#define   SIO_LCR_UEPS_ODD   0x00
#define   SIO_LCR_UEPS_EVEN  0x01
 
#define SIO_LSR         0x1000f110
#define   SIO_LSR_DR 0x01
#define   SIO_LSR_OE 0x02
#define   SIO_LSR_PE 0x04
#define   SIO_LSR_FE 0x08
 
#define SIO_IER         0x1000f120      
#define   SIO_IER_ERDAI 0x01            
#define   SIO_IER_ELSI  0x04            
 
#define SIO_ISR         0x1000f130      
#define   SIO_ISR_RX_DATA  0x01
#define   SIO_ISR_TX_EMPTY 0x02
#define   SIO_ISR_RX_ERROR 0x04
 
#define SIO_FCR         0x1000f140
#define   SIO_FCR_FRSTE 0x01
#define   SIO_FCR_RFRST 0x02
#define   SIO_FCR_TFRST 0x04
 
#define SIO_BGR         0x1000f150
 
#define SIO_TXFIFO      0x1000f180
#define SIO_RXFIFO      0x1000f1c0
 
#define SIO_CAUSE_BIT   (1 << 12)
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Initialize the SIO. 
 * The lcr_* parameters are passed as is, so you'll need to use the SIO_LCR_* register values. 
 * You can pass 0 for all of the lcr_* params to get the standard 8N1 setting (8 data bits, no parity checking, 1 stop bit). 
 * Note: Unlike the BIOS sio_init() routine, we always base the baud rate on the CPU clock.  
 */
void sio_init(u32 baudrate, u8 lcr_ueps, u8 lcr_upen, u8 lcr_usbl, u8 lcr_umode);
 
int sio_putc(int c);
int sio_getc(void);
int sio_getc_block(void);
 
size_t sio_write(void *buf, size_t size);
size_t sio_read(void *buf, size_t size);
 
int sio_puts(const char *str);
int sio_putsn(const char *str); // no newline for this one
char *sio_gets(char *str);
 
void sio_flush(void);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __SIO_H__ */