/*
 * Realtek semiconductor Corp.
 *
 *   arch/rlx/rlxocp/kgdb.c:
 *      Kernel debugging on the rtl5739.
 *
 * Tony Wu (tonywu@realtek.com.tw)
 * Dec. 7, 2007
 */
#include <asm/system.h>
#include <asm/tx3912.h>

static int remoteDebugInitialized = 0;

void debugInit(void)
{
/*
 * If low-level debugging (before GDB or console operational) is
 * configured, then we do not need to re-initialize the UART.
 */
#ifndef CONFIG_DEBUG_LL
//      earlyInitUartPR31700();
#endif
}

char getDebugChar(void)
{
    char buf;
    unsigned long int2, flags;

    if (!remoteDebugInitialized) {
        debugInit();
        remoteDebugInitialized = 1;
    }

    save_and_cli(flags);

    int2 = IntEnable2;

    IntEnable2 = 0;

    while (!(UartA_Ctrl1 & UART_RX_HOLD_FULL));

    buf = UartA_Data;

    IntEnable2 = int2;

    restore_flags(flags);

    return buf;
}

int putDebugChar(char c)
{
    int i;
    unsigned long int2;

    if (!remoteDebugInitialized) {
        debugInit();
        remoteDebugInitialized = 1;
    }

    int2 = IntEnable2;

    IntEnable2 &=
        ~(INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY);

    for (i = 0; !(IntStatus2 & INT2_UARTATXINT) && (i < 10000); i++);

    IntClear2 = INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY;

    UartA_Data = c;

    for (i = 0; !(IntStatus2 & INT2_UARTATXINT) && (i < 10000); i++);

    IntClear2 = INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY;

    IntEnable2 = int2;

    return 1;
}