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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.

//

// 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

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// 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.,

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

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// in accordance with section (3) of the GNU General Public License.

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   nickg, gthomas

// Contributors:nickg, gthomas, jlarmour

// Date:        2001-03-21

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#if CYGINT_HAL_V850_DIAG_ONCHIP_SERIAL0

#include <pkgconf/system.h>

#include CYGBLD_HAL_PLATFORM_H

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

#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/hal_stub.h>           // target_register_t

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

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

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

#include <cyg/hal/v850_common.h>        // hardware registers, etc.

#define BAUD_COUNT ((CYGHWR_HAL_V85X_CPU_FREQ/2)/CYGHWR_HAL_V85X_V850_DIAG_BAUD)

#define BAUD_DIVISOR 1

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

// V850

void

init_serial_channel(void* base)

{

    volatile unsigned char *mode = (volatile unsigned char *)V850_REG_ASIM0;

    volatile unsigned char *brgc = (volatile unsigned char *)V850_REG_BRGC0;

    volatile unsigned char *brgm0 = (volatile unsigned char *)V850_REG_BRGMC00;

#ifdef V850_REG_BRGMC01

    volatile unsigned char *brgm1 = (volatile unsigned char *)V850_REG_BRGMC01;

#endif

    volatile unsigned char *rxstat = (volatile unsigned char *)V850_REG_SRIC0;

    volatile unsigned char *rxerr = (volatile unsigned char *)V850_REG_SERIC0;

    volatile unsigned char *txstat = (volatile unsigned char *)V850_REG_STIC0;

    int count = BAUD_COUNT;

    int divisor = BAUD_DIVISOR;

    while (count > 0xFF) {

        count >>= 1;

        divisor++;

    }

    *mode = 0xC8;

    *brgc = count;

    *brgm0 = divisor & 0x07;

#ifdef V850_REG_BRGMC01

    *brgm1 = divisor >> 3;

#endif

    *rxstat = 0x47;

    *rxerr = 0;

    *txstat = 0x47;

}

// Actually send character down the wire

void

cyg_hal_plf_serial_putc(void* __ch_data, cyg_uint8 c)

{

    volatile unsigned char *TxDATA = (volatile unsigned char *)V850_REG_TXS0;

    volatile unsigned char *TxSTAT = (volatile unsigned char *)V850_REG_STIC0;

    int timeout = 0xFFFF;

    CYGARC_HAL_SAVE_GP();

    // Send character

    *TxDATA = (unsigned char)c;

    // Wait for Tx not busy

    while ((*TxSTAT & 0x80) == 0x00) {

        if (--timeout == 0)

            break;

    }

    *TxSTAT &= ~0x80;

    CYGARC_HAL_RESTORE_GP();

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    volatile unsigned char *RxDATA = (volatile unsigned char *)V850_REG_RXB0;

    volatile unsigned char *RxSTAT = (volatile unsigned char *)V850_REG_SRIC0;

    if ((*RxSTAT & 0x80) == 0x00)

        return false;

    *ch = (char)*RxDATA;

    *RxSTAT &= ~0x80;

    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();

}

static cyg_int32 msec_timeout = 1000;

cyg_bool

cyg_hal_plf_serial_getc_timeout(void* __ch_data, cyg_uint8* ch)

{

    int delay_count = msec_timeout * 10; // delay in .1 ms steps

    cyg_bool res;

    CYGARC_HAL_SAVE_GP();

    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;

    int ret = 0;

    CYGARC_HAL_SAVE_GP();

    switch (__func) {

    case __COMMCTL_IRQ_ENABLE:

        HAL_INTERRUPT_UNMASK(CYGNUM_HAL_VECTOR_INTCSI1);

        irq_state = 1;

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        HAL_INTERRUPT_MASK(CYGNUM_HAL_VECTOR_INTCSI1);

        break;

    case __COMMCTL_DBG_ISR_VECTOR:

        ret = CYGNUM_HAL_VECTOR_INTCSI1;

        break;

    case __COMMCTL_SET_TIMEOUT:

    {

        va_list ap;

        va_start(ap, __func);

        ret = msec_timeout;

        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)

{

    volatile unsigned char *RxDATA = (volatile unsigned char *)V850_REG_RXB0;

    cyg_uint8 c;

    int res = 0;

    CYGARC_HAL_SAVE_GP();

    c = (char)*RxDATA;

    *__ctrlc = 0;

    if( cyg_hal_is_break( &c , 1 ) )

        *__ctrlc = 1;

    cyg_drv_interrupt_acknowledge(CYGNUM_HAL_VECTOR_INTCSI1);

    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(CYGNUM_HAL_VECTOR_INTCSI1);

    // Init channels

    init_serial_channel((cyg_uint8*)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, 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);

}

__externC void cyg_hal_plf_ice_diag_init();

void

cyg_hal_plf_comms_init(void)

{

    static int initialized = 0;

    if (initialized)

        return;

    initialized = 1;

    cyg_hal_plf_serial_init();

#ifdef CYGDBG_HAL_V85X_V850_ICE_DIAG

    cyg_hal_plf_ice_diag_init();

#endif

}

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

// Compatibility with older stubs

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

#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

// Assumption: all diagnostic output must be GDB packetized unless this is a ROM (i.e.

// totally stand-alone) system.

//#ifdef CYGSEM_HAL_ROM_MONITOR

//#define CYG_HAL_STARTUP_ROM

//#undef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

//#endif

#if (defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)) \

    && !defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

#define HAL_DIAG_USES_HARDWARE

#else

#if !defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)

#define HAL_DIAG_USES_HARDWARE

#endif

#endif

void hal_diag_init(void)

{

    init_serial_channel(0);

}

#ifdef HAL_DIAG_USES_HARDWARE

void hal_diag_write_char(char c)

{

    CYG_INTERRUPT_STATE old;

    HAL_DISABLE_INTERRUPTS(old);

    cyg_hal_plf_serial_putc(0, c);

    HAL_RESTORE_INTERRUPTS(old);

}

void hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(0);

}

#else // HAL_DIAG relies on GDB

void

hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(0);

}

void

hal_diag_write_char(char c)

{

    static char line[100];

    static int pos = 0;

    // No need to send CRs

    if( c == '\r' ) return;

    line[pos++] = c;

    if( c == '\n' || pos == sizeof(line) )

    {

        CYG_INTERRUPT_STATE old;

        // Disable interrupts. This prevents GDB trying to interrupt us

        // while we are in the middle of sending a packet. The serial

        // receive interrupt will be seen when we re-enable interrupts

        // later.

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

        CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);

#else

        HAL_DISABLE_INTERRUPTS(old);

#endif

        while(1)

        {

            static char hex[] = "0123456789ABCDEF";

            cyg_uint8 csum = 0;

            int i;

            char c1;

            cyg_hal_plf_serial_putc(0, '$');

            cyg_hal_plf_serial_putc(0, 'O');

            csum += 'O';

            for( i = 0; i < pos; i++ )

            {

                char ch = line[i];

                char h = hex[(ch>>4)&0xF];

                char l = hex[ch&0xF];

                cyg_hal_plf_serial_putc(0, h);

                cyg_hal_plf_serial_putc(0, l);

                csum += h;

                csum += l;

            }

            cyg_hal_plf_serial_putc(0, '#');

            cyg_hal_plf_serial_putc(0, hex[(csum>>4)&0xF]);

            cyg_hal_plf_serial_putc(0, hex[csum&0xF]);

            // Wait for the ACK character '+' from GDB here and handle

            // receiving a ^C instead.  This is the reason for this clause

            // being a loop.

            c1 = cyg_hal_plf_serial_getc(0);

            if( c1 == '+' )

                break;              // a good acknowledge

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && \

    defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)

            cyg_drv_interrupt_acknowledge(CYGNUM_HAL_VECTOR_INTCSI1);

            if( c1 == 3 ) {

                // Ctrl-C: breakpoint.

                cyg_hal_gdb_interrupt (__builtin_return_address(0));

                break;

            }

#endif

            // otherwise, loop round again

        }

        pos = 0;

        // And re-enable interrupts

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

        CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);

#else

        HAL_RESTORE_INTERRUPTS(old);

#endif

    }

}

#endif  // USE HARDWARE

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

#endif // #if CYGINT_HAL_V850_DIAG_ONCHIP_SERIAL0

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

/* End of hal_diag.c */