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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, 2003 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later

// version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License

// along with eCos; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//

// As a special exception, if other files instantiate templates or use

// macros or inline functions from this file, or you compile this file

// and link it with other works to produce a work based on this file,

// this file does not by itself cause the resulting work to be covered by

// the GNU General Public License. However the source code for this file

// must still be made available in accordance with section (3) of the GNU

// General Public License v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

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

// ####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   nickg, gthomas

// Contributors:nickg, gthomas

// Date:        1998-03-02

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

//===========================================================================*/

#include <pkgconf/hal.h>

#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>           // SAVE/RESTORE GP macros

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

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

#include <cyg/hal/hal_intr.h>           // HAL_ENABLE/MASK/UNMASK_INTERRUPTS

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

#include <cyg/hal/drv_api.h>            // CYG_ISR_HANDLED

#include <cyg/hal/gps4020.h>

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

typedef struct {

    volatile struct _gps4020_uart *base;

    cyg_int32             msec_timeout;

    int                   isr_vector;

    int                   int_state;

} channel_data_t;

static channel_data_t serial_channels[] = {

    { (volatile struct _gps4020_uart *)GPS4020_UART1, 1000, CYGNUM_HAL_INTERRUPT_UART1_RX, 0 },

};

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

static void

cyg_hal_plf_serial_init_channel(void* __ch_data)

{

    volatile struct _gps4020_uart *uart = ((channel_data_t*)__ch_data)->base;

    uart->mode = SMR_STOP_1 | SMR_PARITY_OFF | SMR_LENGTH_8;

    uart->baud = 0x15;  // FIXME - Magic for 57600

    uart->modem_control = SMR_DTR | SMR_RTS;

    uart->control = SCR_TEN | SCR_REN;

}

void

cyg_hal_plf_serial_putc(void *__ch_data, char c)

{

    volatile struct _gps4020_uart *uart = ((channel_data_t*)__ch_data)->base;

    // Wait for space for character

    do {

    } while ((uart->status & SSR_TxEmpty) == 0);

    uart->TxRx = c;

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void *__ch_data, cyg_uint8 *ch)

{

    volatile struct _gps4020_uart *uart = ((channel_data_t*)__ch_data)->base;

    if ((uart->status & SSR_RxFull) == 0) {

        return false;

    }

    *ch = uart->TxRx;

    return true;

}

cyg_uint8

cyg_hal_plf_serial_getc(void* __ch_data)

{

    cyg_uint8 ch;

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

    return ch;

}

static void

cyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf,

                         cyg_uint32 __len)

{

    while(__len-- > 0)

        cyg_hal_plf_serial_putc(__ch_data, *__buf++);

}

static void

cyg_hal_plf_serial_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)

{

    while(__len-- > 0)

        *__buf++ = cyg_hal_plf_serial_getc(__ch_data);

}

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;

    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);

    }

    return res;

}

static int

cyg_hal_plf_serial_control(void *__ch_data, __comm_control_cmd_t __func, ...)

{

    channel_data_t* chan = (channel_data_t*)__ch_data;

    volatile struct _gps4020_uart *uart = ((channel_data_t*)__ch_data)->base;

    int ret = 0;

    switch (__func) {

    case __COMMCTL_IRQ_ENABLE:

        chan->int_state = 1;

        uart->control |= SCR_RIE;

        HAL_INTERRUPT_UNMASK(chan->isr_vector);

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = chan->int_state;

        chan->int_state = 0;

        uart->control &= ~SCR_RIE;

        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;

    }

    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;

    volatile struct _gps4020_uart *uart = ((channel_data_t*)__ch_data)->base;

    char c;

    cyg_drv_interrupt_acknowledge(chan->isr_vector);

    *__ctrlc = 0;

    if ((uart->status & SSR_RxFull) != 0) {

        c = uart->TxRx;

        if (cyg_hal_is_break(&c, 1))

            *__ctrlc = 1;

        res = CYG_ISR_HANDLED;

    }

    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);

    // Init channel

    cyg_hal_plf_serial_init_channel(&serial_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, &serial_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();

}