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

// for more details.

//

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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

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// 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

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   jskov

// Contributors:jskov, gthomas

// Date:        2001-07-12

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include CYGBLD_HAL_PLATFORM_H

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

#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/plf_io.h>             // USART registers

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

typedef struct {

    cyg_uint8* base;

    cyg_int32 msec_timeout;

    int isr_vector;

} channel_data_t;

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

static void

cyg_hal_plf_serial_init_channel(void* __ch_data)

{

    cyg_uint8* base = ((channel_data_t*)__ch_data)->base;

    // Reset device

    HAL_WRITE_UINT32(base+AT91_US_CR, AT91_US_CR_RxRESET | AT91_US_CR_TxRESET);

    // 8-1-no parity.

    HAL_WRITE_UINT32(base+AT91_US_MR,

                     AT91_US_MR_CLOCK_MCK | AT91_US_MR_LENGTH_8 |

                     AT91_US_MR_PARITY_NONE | AT91_US_MR_STOP_1);

    HAL_WRITE_UINT32(base+AT91_US_BRG, AT91_US_BAUD(CYGNUM_HAL_VIRTUAL_VECTOR_CHANNELS_DEFAULT_BAUD));

    // Enable RX and TX

    HAL_WRITE_UINT32(base+AT91_US_CR, AT91_US_CR_RxENAB | AT91_US_CR_TxENAB);

}

void

cyg_hal_plf_serial_putc(void *__ch_data, char c)

{

    cyg_uint8* base = ((channel_data_t*)__ch_data)->base;

    cyg_uint32 status, ch;

    CYGARC_HAL_SAVE_GP();

    do {

        HAL_READ_UINT32(base+AT91_US_CSR, status);

    } while ((status & AT91_US_CSR_TxRDY) == 0);

    ch = (cyg_uint32)c;

    HAL_WRITE_UINT32(base+AT91_US_THR, ch);

    CYGARC_HAL_RESTORE_GP();

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    channel_data_t* chan = (channel_data_t*)__ch_data;

    cyg_uint8* base = chan->base;

    cyg_uint32 stat;

    cyg_uint32 c;

    HAL_READ_UINT32(base+AT91_US_CSR, stat);

    if ((stat & AT91_US_CSR_RxRDY) == 0)

        return false;

    HAL_READ_UINT32(base+AT91_US_RHR, c);

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

    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 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;

    cyg_uint8* base = ((channel_data_t*)__ch_data)->base;

    int ret = 0;

    CYGARC_HAL_SAVE_GP();

    switch (__func) {

    case __COMMCTL_IRQ_ENABLE:

        irq_state = 1;

        HAL_INTERRUPT_ACKNOWLEDGE(chan->isr_vector);

        HAL_INTERRUPT_UNMASK(chan->isr_vector);

        HAL_WRITE_UINT32(base+AT91_US_IER, AT91_US_IER_RxRDY);

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        HAL_INTERRUPT_MASK(chan->isr_vector);

        HAL_WRITE_UINT32(base+AT91_US_IDR, AT91_US_IER_RxRDY);

        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 c;

    cyg_uint8 ch;

    cyg_uint32 stat;

    CYGARC_HAL_SAVE_GP();

    *__ctrlc = 0;

    HAL_READ_UINT32(chan->base+AT91_US_CSR, stat);

    if ( (stat & AT91_US_CSR_RxRDY) != 0 ) {

        HAL_READ_UINT32(chan->base+AT91_US_RHR, c);

        ch = (cyg_uint8)(c & 0xff);

        if( cyg_hal_is_break( &ch , 1 ) )

            *__ctrlc = 1;

        res = CYG_ISR_HANDLED;

    }

    HAL_INTERRUPT_ACKNOWLEDGE(chan->isr_vector);

    CYGARC_HAL_RESTORE_GP();

    return res;

}

static channel_data_t at91_ser_channels[2] = {

    { (cyg_uint8*)AT91_USART0, 1000, CYGNUM_HAL_INTERRUPT_USART0},

    { (cyg_uint8*)AT91_USART1, 1000, CYGNUM_HAL_INTERRUPT_USART1}

};

static void

cyg_hal_plf_serial_init(void)

{

    hal_virtual_comm_table_t* comm;

    int cur;

    cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    // Init channels

    cyg_hal_plf_serial_init_channel(&at91_ser_channels[0]);

#if CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS > 1

    cyg_hal_plf_serial_init_channel(&at91_ser_channels[1]);

#endif

    // 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, &at91_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);

#if CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS > 1

    // Set channel 1

    CYGACC_CALL_IF_SET_CONSOLE_COMM(1);

    comm = CYGACC_CALL_IF_CONSOLE_PROCS();

    CYGACC_COMM_IF_CH_DATA_SET(*comm, &at91_ser_channels[1]);

    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);

#endif

    // 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