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

//

//      hal_diag.c

//

//      HAL diagnostic output code

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

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//

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// or inline functions from this file, or you compile this file and link it

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   jskov

// Contributors:jskov

// Date:        2001-08-06

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include CYGBLD_HAL_VARIANT_H           // Variant specific configuration

#include CYGBLD_HAL_PLATFORM_H          // Platform specific configuration

#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>           // basic machine info

#include <cyg/hal/hal_intr.h>           // interrupt macros

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

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/drv_api.h>

#include <cyg/hal/hal_if.h>             // interface API

#include <cyg/hal/hal_misc.h>           // Helper functions

#include <cyg/hal/excalibur.h>          // platform definitions

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

#define CYG_DEVICE_SERIAL_BAUD_DIV (CYGNUM_HAL_ARM_EXCALIBUR_PERIPHERAL_CLOCK/CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD/16)

#define CYG_DEVICE_SERIAL_BAUD_LSB (CYG_DEVICE_SERIAL_BAUD_DIV&0xff)

#define CYG_DEVICE_SERIAL_BAUD_MSB ((CYG_DEVICE_SERIAL_BAUD_DIV>>8)&0xff)

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

typedef struct {

    cyg_uint32 base;

    cyg_int32 msec_timeout;

    int isr_vector;

} channel_data_t;

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

static void

cyg_hal_plf_serial_init_channel(void* __ch_data)

{

    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;

    // 8-1-no parity.

    HAL_WRITE_UINT32(base+_UART_MC, _UART_MC_8BIT | _UART_MC_1STOP | _UART_MC_PARITY_NONE);

    HAL_WRITE_UINT32(base+_UART_DIV_LO, CYG_DEVICE_SERIAL_BAUD_LSB);

    HAL_WRITE_UINT32(base+_UART_DIV_HI, CYG_DEVICE_SERIAL_BAUD_MSB);

    HAL_WRITE_UINT32(base+_UART_FCR, (_UART_FCR_TC | _UART_FCR_RC |

                                      _UART_FCR_TX_THR_15 | _UART_FCR_RX_THR_1));  // clear & enableFIFO

    // enable RX interrupts - otherwise ISR cannot be polled. Actual

    // interrupt control of serial happens via INT_MASK

    HAL_WRITE_UINT32(base+_UART_IES, _UART_INTS_RE);

}

void

cyg_hal_plf_serial_putc(void *__ch_data, char c)

{

    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;

    cyg_uint32 tsr;

    CYGARC_HAL_SAVE_GP();

    do {

        HAL_READ_UINT32(base+_UART_TSR, tsr);

        // Wait for TXI flag to be set - or for the register to be

        // zero (works around a HW bug it seems).

    } while (tsr && (tsr & _UART_TSR_TXI) == 0);

    HAL_WRITE_UINT32(base+_UART_TD, (cyg_uint32)(unsigned char)c);

    CYGARC_HAL_RESTORE_GP();

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;

    cyg_uint32 rsr, isr, data;

    HAL_READ_UINT32(base+_UART_ISR, isr);

    if (0 == (isr & _UART_INTS_RI)) {

        HAL_READ_UINT32(base+_UART_RSR, rsr);

        if (0 == rsr)

            return false;

    }

    HAL_READ_UINT32(base+_UART_RD, data);

    *ch = (cyg_uint8)(data & 0xff);

    // Read RSR to clear interrupt, and RDS to clear errors

    HAL_READ_UINT32(base+_UART_RSR, data);

    HAL_READ_UINT32(base+_UART_RDS, data);

    return true;

}

cyg_uint8

cyg_hal_plf_serial_getc(void* __ch_data)

{

    cyg_uint8 ch;

    CYGARC_HAL_SAVE_GP();

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

    CYGARC_HAL_RESTORE_GP();

    return ch;

}

static channel_data_t excalibur_ser_channels[1] = {

    { (cyg_uint32)EXCALIBUR_UART0_BASE, 1000, CYGNUM_HAL_INTERRUPT_UART }

};

static void

cyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf,

                         cyg_uint32 __len)

{

    CYGARC_HAL_SAVE_GP();

    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();

    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 = (channel_data_t*)__ch_data;

    cyg_bool res;

    CYGARC_HAL_SAVE_GP();

    delay_count = chan->msec_timeout * 10; // delay in .1 ms steps

    for(;;) {

        res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);

        if (res || 0 == delay_count--)

            break;

        CYGACC_CALL_IF_DELAY_US(100);

    }

    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 = (channel_data_t*)__ch_data;

    int ret = 0;

    CYGARC_HAL_SAVE_GP();

    switch (__func) {

    case __COMMCTL_IRQ_ENABLE:

        irq_state = 1;

        // Need to keep it enabled to allow polling using ISR

        //HAL_WRITE_UINT32(chan->base+_UART_IES, _UART_INTS_RE);

        HAL_INTERRUPT_UNMASK(chan->isr_vector);

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        // Need to keep it enabled to allow polling using ISR

        // HAL_WRITE_UINT32(chan->base+_UART_IEC, _UART_INTS_RE);

        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);

    }

    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;

    channel_data_t* chan = (channel_data_t*)__ch_data;

    cyg_uint32 isr, ch, rsr;

    char c;

    CYGARC_HAL_SAVE_GP();

    cyg_drv_interrupt_acknowledge(chan->isr_vector);

    *__ctrlc = 0;

    HAL_READ_UINT32(chan->base+_UART_ISR, isr);

    HAL_READ_UINT32(chan->base+_UART_RSR, rsr);

    // Again, check both RI and the RX FIFO count.

    if ( ((isr & _UART_INTS_RI) != 0 ) || (rsr) ) {

        HAL_READ_UINT32(chan->base+_UART_RD, ch);

        c = (char)ch;

        if( cyg_hal_is_break( &c , 1 ) )

            *__ctrlc = 1;

        res = CYG_ISR_HANDLED;

    }

    CYGARC_HAL_RESTORE_GP();

    return res;

}

static void

cyg_hal_plf_serial_init(void)

{

    hal_virtual_comm_table_t* comm;

    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    // Disable interrupts.

    HAL_INTERRUPT_MASK(excalibur_ser_channels[0].isr_vector);

    // Init channels

    cyg_hal_plf_serial_init_channel(&excalibur_ser_channels[0]);

    // Setup procs in the vector table

    // Set channel 0

    CYGACC_CALL_IF_SET_CONSOLE_COMM(0);

    comm = CYGACC_CALL_IF_CONSOLE_PROCS();

    CYGACC_COMM_IF_CH_DATA_SET(*comm, &excalibur_ser_channels[0]);

    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();

}

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

// LEDs

void

hal_diag_led(int n)

{

}

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

// End of hal_diag.c