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//=============================================================================

//

//      plf_stub.c

//

//      Platform specific code for GDB stub support.

//

//=============================================================================

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//

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//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   nickg, jskov (based on the old tx39 hal_stub.c)

// Contributors:tmichals

// Date:        1999-02-12

// Purpose:     Platform specific code for GDB stub support.

//              

//####DESCRIPTIONEND####

//

//=============================================================================

#include <pkgconf/hal.h>

#include <pkgconf/system.h>

#include CYGBLD_HAL_PLATFORM_H

#include <cyg/hal/drv_api.h>          // Cache handling

#include <cyg/infra/cyg_type.h>         // Base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_arch.h>           // architectural definitions

#include <cyg/hal/hal_intr.h>           // Interrupt handling

#include <cyg/hal/hal_cache.h>          // Cache handling

#include <cyg/hal/hal_io.h>             // HAL IO macros

#include <cyg/hal/hal_diag.h>           // diag output. FIXME

#include <cyg/hal/idt32334sio.h>

#include <pkgconf/hal.h>

#include <cyg/hal/hal_intr.h>

#define PIO_DIRCNTL_REG         0xb8000604

void hal_IDT32334_init_serial_baud( int baud )

{

        cyg_uint16 baud_divisor;

        cyg_uint8 _lcr, _ier;

        cyg_addrword_t port = CMA_SER_16550_BASE_A;

        cyg_uint32  status;

        HAL_READ_UINT32 ( PIO_DIRCNTL_REG+4, status);

        status |= 0xf0;

        HAL_WRITE_UINT32 ( PIO_DIRCNTL_REG+4, status);

        HAL_READ_UINT32 (PIO_DIRCNTL_REG, status);

        status &= 0xffffff0f;

        status |= 0x50;

        HAL_WRITE_UINT32(PIO_DIRCNTL_REG, status);

        baud_divisor = (CYGHWR_HAL_MIPS_CPU_FREQ_ACTUAL) / (16 * baud);

        // Set databits, stopbits and parity.

        _lcr = LCR_WL8 | LCR_SB1 | LCR_PN;

        HAL_WRITE_UINT8(port+SER_16550_LCR, _lcr);

        // Set baud rate.

        _lcr |= LCR_DL;

        HAL_WRITE_UINT8(port+SER_16550_LCR, _lcr);

        HAL_WRITE_UINT8(port+SER_16550_DLM, baud_divisor >> 8);

        HAL_WRITE_UINT8(port+SER_16550_DLL, baud_divisor & 0xff);

        _lcr &= ~LCR_DL;

        HAL_WRITE_UINT8(port+SER_16550_LCR, _lcr);

        HAL_WRITE_UINT8(port+SER_16550_FCR, 0x1);

        HAL_WRITE_UINT8(port+SER_16550_MSR, 0x30);

}

#ifndef CYGNUM_IO_SERIAL_IDT32334_SERIAL0_BAUD

# define        CYGNUM_IO_SERIAL_IDT32334_SERIAL0_BAUD 115200

#endif

// Initialize the current serial port.

void hal_IDT32334_init_serial( void )

{

         hal_IDT32334_init_serial_baud(  CYGNUM_IO_SERIAL_IDT32334_SERIAL0_BAUD);

}

// Write C to the current serial port.

void hal_IDT32334_put_char( int c )

{

        cyg_uint8 _lsr;

        cyg_addrword_t port =CMA_SER_16550_BASE_A;

        do

        {

                HAL_READ_UINT8(port+SER_16550_LSR, _lsr);

        }while ( !(_lsr & SIO_LSR_THRE)  && (_lsr));

        if ((_lsr & SIO_LSR_THRE) || (!_lsr))

                HAL_WRITE_UINT8(port+SER_16550_THR, c);

}

// Read one character from the current serial port.

int hal_IDT32334_get_char( void )

{

        unsigned char c;

        cyg_uint8 _lsr;

        cyg_addrword_t port = CMA_SER_16550_BASE_A;

        do {

                HAL_READ_UINT8(port+SER_16550_LSR, _lsr);

        } while ((_lsr & SIO_LSR_DR) == 0);

        HAL_READ_UINT8(port+SER_16550_RBR, c);

        return c;

}

int hal_IDT32334_chk_char()

{

        unsigned char c;

        cyg_uint8 _lsr;

        cyg_addrword_t port = CMA_SER_16550_BASE_A;

        HAL_READ_UINT8(port+SER_16550_LSR, _lsr);

        return (_lsr & SIO_LSR_DR)?1:0;

}

//#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

//-----------------------------------------------------------------------------

// End of plf_stub.c