hal_diag.c

eCos操作系统源码

    cyg_uint8* port;
    cyg_uint8 _lsr;

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    port = ((channel_data_t*)__ch_data)->base;

    HAL_READ_UINT8(port+SER_16550_LSR, _lsr);
    if ((_lsr & SIO_LSR_DR) == 0)
        return false;
    lsr_global = _lsr;
    CYG_ASSERT((_lsr & SIO_LSR_OE) == 0 , "UART receiver overrun error");
    HAL_READ_UINT8(port+SER_16550_RBR, *ch);

    return true;
}

cyg_uint8
cyg_hal_plf_serial_getc(void* __ch_data)
{
    cyg_uint8 ch;
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    while(!cyg_hal_plf_serial_getc_nonblock(__ch_data, &ch));

    CYGARC_HAL_RESTORE_GP();
    return ch;
}

static void
cyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf, 
                         cyg_uint32 __len)
{
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    while(__len-- > 0)
        cyg_hal_plf_serial_putc(__ch_data, *__buf++);

    CYGARC_HAL_RESTORE_GP();
}

static void
cyg_hal_plf_serial_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)
{
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    while(__len-- > 0)
        *__buf++ = cyg_hal_plf_serial_getc(__ch_data);

    CYGARC_HAL_RESTORE_GP();
}


cyg_bool
cyg_hal_plf_serial_getc_timeout(void* __ch_data, cyg_uint8* ch)
{
    int delay_count;
    channel_data_t* chan;
    cyg_bool res;
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    chan = (channel_data_t*)__ch_data;

    delay_count = chan->msec_timeout; // delay in 1000 us steps

    for(;;) {
        res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);
        if (res || 0 == delay_count--)
            break;
        CYGACC_CALL_IF_DELAY_US(1000);
    }

    CYGARC_HAL_RESTORE_GP();
    return res;
}

static int
cyg_hal_plf_serial_control(void *__ch_data, __comm_control_cmd_t __func, ...)
{
    static int irq_state = 0;
    channel_data_t* chan;
    cyg_uint8 ier;
    int ret = 0;
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    chan = (channel_data_t*)__ch_data;

    switch (__func) {
    case __COMMCTL_IRQ_ENABLE:
        irq_state = 1;

        HAL_READ_UINT8(chan->base + SER_16550_IER, ier);
        ier |= SIO_IER_ERDAI;
        HAL_WRITE_UINT8(chan->base + SER_16550_IER, ier);

        HAL_INTERRUPT_SET_LEVEL(chan->isr_vector, 1);
        HAL_INTERRUPT_UNMASK(chan->isr_vector);
        break;
    case __COMMCTL_IRQ_DISABLE:
        ret = irq_state;
        irq_state = 0;

        HAL_READ_UINT8(chan->base + SER_16550_IER, ier);
        ier &= ~SIO_IER_ERDAI;
        HAL_WRITE_UINT8(chan->base + SER_16550_IER, ier);

        HAL_INTERRUPT_MASK(chan->isr_vector);
        break;
    case __COMMCTL_DBG_ISR_VECTOR:
        ret = chan->isr_vector;
        break;
    case __COMMCTL_SET_TIMEOUT:
    {
        va_list ap;

        va_start(ap, __func);

        ret = chan->msec_timeout;
        chan->msec_timeout = va_arg(ap, cyg_uint32);

        va_end(ap);
    }        
    break;
    case __COMMCTL_SETBAUD:
    {
        cyg_uint32 baud_rate;
        cyg_uint16 baud_divisor;
        cyg_uint8* port = chan->base;
        va_list ap;

        va_start(ap, __func);
        baud_rate = va_arg(ap, cyg_uint32);
        va_end(ap);

        switch (baud_rate)
        {
        case 110:    baud_divisor = DIVISOR(110);    break;
        case 150:    baud_divisor = DIVISOR(150);    break;
        case 300:    baud_divisor = DIVISOR(300);    break;
        case 600:    baud_divisor = DIVISOR(600);    break;
        case 1200:   baud_divisor = DIVISOR(1200);   break;
        case 2400:   baud_divisor = DIVISOR(2400);   break;
        case 4800:   baud_divisor = DIVISOR(4800);   break;
        case 7200:   baud_divisor = DIVISOR(7200);   break;
        case 9600:   baud_divisor = DIVISOR(9600);   break;
        case 14400:  baud_divisor = DIVISOR(14400);  break;
        case 19200:  baud_divisor = DIVISOR(19200);  break;
        case 38400:  baud_divisor = DIVISOR(38400);  break;
        case 57600:  baud_divisor = DIVISOR(57600);  break;
        case 115200: baud_divisor = DIVISOR(115200); break;
        case 230400: baud_divisor = DIVISOR(230400); break;
        default:     return -1;                      break; // Invalid baud rate selected
        }

        // Disable port interrupts while changing hardware
        HAL_READ_UINT8(port+SER_16550_IER, ier);
        HAL_WRITE_UINT8(port+SER_16550_IER, 0);

        // Set baud rate.
        cyg_hal_plf_serial_set_baud(port, baud_divisor);

        // Reenable interrupts if necessary
        HAL_WRITE_UINT8(port+SER_16550_IER, ier);
    }
    break;

    case __COMMCTL_GETBAUD:
        break;
    default:
        break;
    }
    CYGARC_HAL_RESTORE_GP();
    return ret;
}

static int
cyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc, 
                       CYG_ADDRWORD __vector, CYG_ADDRWORD __data)
{
    int res = 0;
    cyg_uint8 _iir, c;
    channel_data_t* chan;
    CYGARC_HAL_SAVE_GP();

    // Some of the diagnostic print code calls through here with no idea what the ch_data is.
    // Go ahead and assume it is channels[0].
    if (__ch_data == 0)
      __ch_data = (void*)&channels[0];

    chan = (channel_data_t*)__ch_data;

    HAL_INTERRUPT_ACKNOWLEDGE(chan->isr_vector);

    HAL_READ_UINT8(chan->base + SER_16550_IIR, _iir);
    _iir &= SIO_IIR_ID_MASK;

    *__ctrlc = 0;
    if ((_iir == ISR_Rx_Avail) || (_iir == ISR_Rx_Char_Timeout)) {

        HAL_READ_UINT8(chan->base + SER_16550_RBR, c);
    
        if( cyg_hal_is_break( &c , 1 ) )
            *__ctrlc = 1;

        res = CYG_ISR_HANDLED;
    }

    /* sfurman - Hmmm.  Under or1ksim, we sometimes receive interrupts
       when no characters are in the FIFO.  I think this is a SW bug
       and not a problem w/ or1ksim, but until the problem is solved,
       we always consume the interrupt */
    res = CYG_ISR_HANDLED;

    CYGARC_HAL_RESTORE_GP();
    return res;
}

static void
cyg_hal_plf_serial_init(void)
{
    int i;
    hal_virtual_comm_table_t* comm;
    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    //#define NUM_CHANNELS (sizeof(channels)/sizeof(channels[0]))
#define NUM_CHANNELS CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
    for (i = 0; i < NUM_CHANNELS; i++) {

	// Disable interrupts.
	HAL_INTERRUPT_MASK(channels[i].isr_vector);

	// Init channels
	cyg_hal_plf_serial_init_channel((void*)&channels[i]);
    
	// Setup procs in the vector table

	// Set COMM callbacks for channel
	CYGACC_CALL_IF_SET_CONSOLE_COMM(i);
	comm = CYGACC_CALL_IF_CONSOLE_PROCS();
	CYGACC_COMM_IF_CH_DATA_SET(*comm, &channels[i]);
	CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
	CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
	CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
	CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
	CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
	CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
	CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);
    }

    // Restore original console
    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
}

void
cyg_hal_plf_comms_init(void)
{
    static int initialized = 0;

    if (initialized)
        return;

    initialized = 1;

    cyg_hal_plf_serial_init();
}

//-----------------------------------------------------------------------------
// end of hal_diag.c