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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 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):   <knud.woehler@microplex.de>

// Date:        2002-09-03

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include <pkgconf/system.h>

#include CYGBLD_HAL_PLATFORM_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>           // basic machine info

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

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

#include <cyg/hal/hal_if.h>             // Calling interface definitions

#include <cyg/hal/hal_diag.h>

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

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

#include <cyg/hal/hal_pxa2x0.h>         // Hardware definitions

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

typedef struct {

    cyg_uint8* base;

    cyg_int32 msec_timeout;

    int isr_vector;

    int baud_rate;

} channel_data_t;

/*---------------------------------------------------------------------------*/

// PXA2X0 Serial Port (UARTx) for Debug

static void

init_channel(channel_data_t* __ch_data)

{

        cyg_uint8* base = __ch_data->base;

        cyg_uint8 lcr;

    cyg_uint32 brd;

        // 8-1-no parity.

        lcr = PXA2X0_UART_LCR_WLS0 | PXA2X0_UART_LCR_WLS1;

        lcr |= PXA2X0_UART_LCR_DLAB;

        HAL_WRITE_UINT8( base+PXA2X0_UART_LCR, lcr );

        //      Setup divisor

    brd = PXA2X0_UART_BAUD_RATE_DIVISOR( __ch_data->baud_rate );

    HAL_WRITE_UINT8( base+PXA2X0_UART_DLH, (brd >> 8) & 0xff );

    HAL_WRITE_UINT8( base+PXA2X0_UART_DLL, brd & 0xff );

        //      DLAB = 0 to allow access to FIFOs

    lcr &= ~PXA2X0_UART_LCR_DLAB;

    HAL_WRITE_UINT8(base+PXA2X0_UART_LCR, lcr);

        //  Enable & clear FIFOs

        //  set Interrupt Trigger Level to be 1 byte

        HAL_WRITE_UINT8(base+PXA2X0_UART_FCR,

                (PXA2X0_UART_FCR_FCR0 | PXA2X0_UART_FCR_FCR1 | PXA2X0_UART_FCR_FCR2));  // Enable & clear FIFO

        //      Configure NRZ, disable DMA requests and enable UART

        HAL_WRITE_UINT8(base+PXA2X0_UART_IER, PXA2X0_UART_IER_UUE);

}

static void

cyg_hal_plf_serial_putc(void *__ch_data, char c)

{

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

        cyg_uint8 lsr;

        CYGARC_HAL_SAVE_GP();

        do {

                HAL_READ_UINT8(base+PXA2X0_UART_LSR, lsr);

        } while ((lsr & PXA2X0_UART_LSR_THRE) == 0);

        HAL_WRITE_UINT8(base+PXA2X0_UART_THR, c);

        do {

                HAL_READ_UINT8(base+PXA2X0_UART_LSR, lsr);

        } while ((lsr & PXA2X0_UART_LSR_THRE) == 0);

        CYGARC_HAL_RESTORE_GP();

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

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

        cyg_uint8 lsr;

        HAL_READ_UINT8(base+PXA2X0_UART_LSR, lsr);

        if ((lsr & PXA2X0_UART_LSR_DR) == 0)

                return false;

        HAL_READ_UINT8(base+PXA2X0_UART_RBR, *ch);

        return true;

}

static 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 ser_channels[] = {

#if CYGHWR_HAL_ARM_PXA2X0_FFUART != 0

    { (cyg_uint8*)PXA2X0_FFUART_BASE, 1000,

      CYGNUM_HAL_INTERRUPT_FFUART, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD },

#endif

#if CYGHWR_HAL_ARM_PXA2X0_BTUART != 0

    { (cyg_uint8*)PXA2X0_BTUART_BASE, 1000,

      CYGNUM_HAL_INTERRUPT_BTUART, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD },

#endif

#if CYGHWR_HAL_ARM_PXA2X0_STUART != 0

    { (cyg_uint8*)PXA2X0_STUART_BASE, 1000,

      CYGNUM_HAL_INTERRUPT_STUART, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD },

#endif

};

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 = -1;

    cyg_uint8 ier;

        va_list ap;

    CYGARC_HAL_SAVE_GP();

    va_start(ap, __func);

    switch (__func) {

    case __COMMCTL_GETBAUD:

        ret = chan->baud_rate;

        break;

    case __COMMCTL_SETBAUD:

        chan->baud_rate = va_arg(ap, cyg_int32);

        // Should we verify this value here?

        init_channel(chan);

        ret = 0;

        break;

    case __COMMCTL_IRQ_ENABLE:

        HAL_INTERRUPT_UNMASK(chan->isr_vector);

        HAL_INTERRUPT_SET_LEVEL(chan->isr_vector, 1);

        HAL_READ_UINT8(chan->base+PXA2X0_UART_IER, ier);

        ier |= PXA2X0_UART_IER_RAVIE;

        HAL_WRITE_UINT8(chan->base+PXA2X0_UART_IER, ier);

        irq_state = 1;

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        HAL_INTERRUPT_MASK(chan->isr_vector);

        HAL_READ_UINT8(chan->base+PXA2X0_UART_IER, ier);

        ier &= ~PXA2X0_UART_IER_RAVIE;

        HAL_WRITE_UINT8(chan->base+PXA2X0_UART_IER, ier);

        break;

    case __COMMCTL_DBG_ISR_VECTOR:

        ret = chan->isr_vector;

        break;

    case __COMMCTL_SET_TIMEOUT:

        ret = chan->msec_timeout;

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

        break;

    default:

        break;

    }

    va_end(ap);

    CYGARC_HAL_RESTORE_GP();

    return ret;

}

static int

cyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc,

                       CYG_ADDRWORD __vector, CYG_ADDRWORD __data)

{

    channel_data_t* chan = (channel_data_t*)__ch_data;

    cyg_uint8 iir;

    int res = 0;

    CYGARC_HAL_SAVE_GP();

    HAL_READ_UINT8(chan->base+PXA2X0_UART_IIR, iir);

    iir &= PXA2X0_UART_IIR_ID_MASK;

    *__ctrlc = 0;

    if ( iir == 0x04 ) {

        cyg_uint8 c, lsr;

        HAL_READ_UINT8(chan->base+PXA2X0_UART_LSR, lsr);

        if (lsr & PXA2X0_UART_LSR_DR) {

            HAL_READ_UINT8(chan->base+PXA2X0_UART_RBR, c);

            if( cyg_hal_is_break( &c , 1 ) )

                *__ctrlc = 1;

        }

        // Acknowledge the interrupt

        HAL_INTERRUPT_ACKNOWLEDGE(chan->isr_vector);

        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);

    int i;

    // Init channels

#define NUMOF(x) (sizeof(x)/sizeof(x[0]))

    for (i = 0;  i < NUMOF(ser_channels);  i++) {

        init_channel(&ser_channels[i]);

        CYGACC_CALL_IF_SET_CONSOLE_COMM(i);

        comm = CYGACC_CALL_IF_CONSOLE_PROCS();

        CYGACC_COMM_IF_CH_DATA_SET(*comm, &ser_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 */