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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

// 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.,

// 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

// License. However the source code for this file must still be made available

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

//

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//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):    Bob Koninckx

// Contributors: Bob Koninckx

// Date:         2001-12-11

// Purpose:      HAL diagnostic output

// Description:  Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include <cyg/hal/hal_diag.h>           // our header.

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

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

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

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

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

#include <cyg/hal/hal_arch.h>           // SAVE/RESTORE GP

#include <cyg/hal/hal_if.h>             // Calling-if API

static void cyg_hal_plf_serial_init(void);

void

cyg_hal_plf_comms_init(void)

{

    static int initialized = 0;

    if (initialized)

        return;

    initialized = 1;

    cyg_hal_plf_serial_init();

}

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

// Serial driver

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

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

// There are two serial ports.

#define CYG_DEV_SERIAL_BASE_A    0x305008 // SCI0

#define CYG_DEV_SERIAL_BASE_B    0x305020 // SCI1

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

// Define CYG_DEVICE_SERIAL_RS232_SCIBR

// Default baudrate is 38400

// These values are calculated for a 40Mhz clock frequency

// This should be enough, we did not provide clock frequency as a configuration 

// option anyway

#define CYG_DEV_SERIAL_RS232_SCxBR_300    4167

#define CYG_DEV_SERIAL_RS232_SCxBR_600    2083

#define CYG_DEV_SERIAL_RS232_SCxBR_1200   1042

#define CYG_DEV_SERIAL_RS232_SCxBR_2400    521

#define CYG_DEV_SERIAL_RS232_SCxBR_4800    260

#define CYG_DEV_SERIAL_RS232_SCxBR_9600    130 

#define CYG_DEV_SERIAL_RS232_SCxBR_14400    87

#define CYG_DEV_SERIAL_RS232_SCxBR_19200    65

#define CYG_DEV_SERIAL_RS232_SCxBR_28800    43

#define CYG_DEV_SERIAL_RS232_SCxBR_38400    33

#define CYG_DEV_SERIAL_RS232_SCxBR_57600    22

#define CYG_DEV_SERIAL_RS232_SCxBR_115200   11

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

// Define the serial registers.

#define CYG_DEV_SERIAL_RS232_SCCR0 0x00

#define CYG_DEV_SERIAL_RS232_SCCR1 0x01

#define CYG_DEV_SERIAL_RS232_SCSR  0x02

#define CYG_DEV_SERIAL_RS232_SCDR  0x03

#define SCCR0_OTHR   0x8000 // Select baud rate other than system clock

#define SCCR0_LINKBD 0x4000 // Link baud

#define SCCR0_SCxBR  0x1fff // SCI baud rate

#define SCCR1_LOOPS  0x4000 // Loop mode

#define SCCR1_WOMS   0x2000 // Wired or for SCI pins

#define SCCR1_ILT    0x1000 // Idle line detect type

#define SCCR1_PT     0x0800 // Parity type (0 = Odd, 1 = Even)

#define SCCR1_PE     0x0400 // Parity enable

#define SCCR1_M      0x0200 // Mode select (0 = 10 bit frame, 1 = 11 bit frame)

#define SCCR1_WAKE   0x0100 // Wakeup by address mark

#define SCCR1_TIE    0x0080 // Transmit interrupt enable

#define SCCR1_TCIE   0x0040 // Transmit complete interrupt enable

#define SCCR1_RIE    0x0020 // Receiver interrupt enable

#define SCCR1_ILIE   0x0010 // Idle line interrupt enable

#define SCCR1_TE     0x0008 // Transmiter enable

#define SCCR1_RE     0x0004 // Receiver enable

#define SCCR1_RWU    0x0002 // Receiver wakeup

#define SCCR1_SBK    0x0001 // Send break

#define SCSR_TDRE    0x0100 // Transmit data register empty

#define SCSR_TC      0x0080 // Transmit complete

#define SCSR_RDRF    0x0040 // Receive data register full

#define SCSR_RAF     0x0020 // Receive active flag

#define SCSR_IDLE    0x0010 // Idle line detected

#define SCSR_OR      0x0008 // Overrun error

#define SCSR_NF      0x0004 // Noise error flag

#define SCSR_FE      0x0002 // Framing error

#define SCSR_PF      0x0001 // Parity error

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

typedef struct {

    cyg_uint16*  base;

    cyg_int32    msec_timeout;

    int          siu_vector;

    int          imb3_vector;

    unsigned int level;

    int          baud_rate;

} channel_data_t;

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

static void

init_serial_channel(const channel_data_t* __ch_data)

{

    cyg_uint16 * base = __ch_data->base;

    cyg_uint16 br;

    switch(__ch_data->baud_rate)

    {

      case 300:

        br = CYG_DEV_SERIAL_RS232_SCxBR_300;

        break;

      case 600:

        br = CYG_DEV_SERIAL_RS232_SCxBR_600;

        break;

      case 1200:

        br = CYG_DEV_SERIAL_RS232_SCxBR_1200;

        break;

      case 2400:

        br = CYG_DEV_SERIAL_RS232_SCxBR_2400;

        break;

      case 4800:

        br = CYG_DEV_SERIAL_RS232_SCxBR_4800;

        break;

      case 9600:

        br = CYG_DEV_SERIAL_RS232_SCxBR_9600;

        break;

      case 14400:

        br = CYG_DEV_SERIAL_RS232_SCxBR_14400;

        break;

      case 19200:

        br = CYG_DEV_SERIAL_RS232_SCxBR_19200;

        break;

      case 28800:

        br = CYG_DEV_SERIAL_RS232_SCxBR_28800;

        break;

      case 38400:

        br = CYG_DEV_SERIAL_RS232_SCxBR_38400;

        break;

      case 57600:

        br = CYG_DEV_SERIAL_RS232_SCxBR_57600;

        break;

      case 115200:

        br = CYG_DEV_SERIAL_RS232_SCxBR_115200;

        break;

      default:

        // Use the default if something unknown is requested

        br = CYG_DEV_SERIAL_RS232_SCxBR_38400;

        break;

    }

    // 8-1-No parity

    HAL_WRITE_UINT16(base+CYG_DEV_SERIAL_RS232_SCCR1, (SCCR1_TE | SCCR1_RE));

    // Set baud rate

    HAL_WRITE_UINT16(base+CYG_DEV_SERIAL_RS232_SCCR0, br);

}

static cyg_bool

cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    cyg_uint16 status;

    cyg_uint16 result;

    cyg_uint16 * base = ((channel_data_t *)__ch_data)->base;

    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCSR, status);

    if((status & SCSR_RDRF) == 0)

        return false;

    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCDR, result);

    *ch = (cyg_uint8)(result & 0x00ff);

    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;

}

void

cyg_hal_plf_serial_putc(void* __ch_data, cyg_uint8 c)

{

    cyg_uint16 status;

    cyg_uint16 * base = ((channel_data_t *)__ch_data)->base;

    CYGARC_HAL_SAVE_GP();

    do {

       HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCSR, status);

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

    HAL_WRITE_UINT16(base+CYG_DEV_SERIAL_RS232_SCDR, (short)c);

    // Hang around until the character is safely sent

    do {

       HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCSR, status);

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

    CYGARC_HAL_RESTORE_GP();

}

// Channel data

// Do NOT make them const, will cause problems when trying

// to change the timeout parameter ... (Is this a bug in other)

// PowerPC platform hals ?? You only see it when you really start from

// flash ....

static channel_data_t channels[2] = {

    { (cyg_uint16*)CYG_DEV_SERIAL_BASE_A,

      1000,

      CYGNUM_HAL_INTERRUPT_SIU_LVL0,

      CYGNUM_HAL_INTERRUPT_IMB3_SCI0_RX,

      0,

      CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD },

    { (cyg_uint16*)CYG_DEV_SERIAL_BASE_B,

      1000,

      CYGNUM_HAL_INTERRUPT_SIU_LVL0,

      CYGNUM_HAL_INTERRUPT_IMB3_SCI1_RX,

      0,

      CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD }

};

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_GETBAUD:

        ret = chan->baud_rate;

        break;

    case __COMMCTL_SETBAUD:

        {

        va_list ap;

        va_start(ap, __func);

        ret = chan->baud_rate;

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

        init_serial_channel(chan);

        va_end(ap);

        }

        break;

    case __COMMCTL_IRQ_ENABLE:

        HAL_INTERRUPT_SET_LEVEL(chan->imb3_vector, chan->level);

        HAL_INTERRUPT_UNMASK(chan->imb3_vector);

        HAL_INTERRUPT_UNMASK(chan->siu_vector);

        irq_state = 1;

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        HAL_INTERRUPT_MASK(chan->imb3_vector);

        HAL_INTERRUPT_MASK(chan->siu_vector);

        break;

    case __COMMCTL_DBG_ISR_VECTOR:

        ret = chan->siu_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);

        }

        break;

    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;

    cyg_uint16 status;

    cyg_uint16 control;

    cyg_uint16 * base = ((channel_data_t *)__ch_data)->base;

    CYGARC_HAL_SAVE_GP();

    *__ctrlc = 0;

    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCSR, status);

    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCCR1, control);

    if((status & SCSR_RDRF) && (control & SCCR1_RIE))

    {   // Only if the interrupt was caused by the channel

        cyg_uint8 c;

        c = cyg_hal_plf_serial_getc(__ch_data);

        if(cyg_hal_is_break(&c, 1))

            *__ctrlc = 1;

        HAL_INTERRUPT_ACKNOWLEDGE(((channel_data_t *)__ch_data)->imb3_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);

    // Disable interrupts.

    HAL_INTERRUPT_MASK(channels[0].imb3_vector);

    HAL_INTERRUPT_MASK(channels[1].imb3_vector);

    // Init channels

    init_serial_channel(&channels[0]);

    init_serial_channel(&channels[1]);

    // 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, &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);

    // Set channel 1

    CYGACC_CALL_IF_SET_CONSOLE_COMM(1);

    comm = CYGACC_CALL_IF_CONSOLE_PROCS();

    CYGACC_COMM_IF_CH_DATA_SET(*comm, &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);

    // Restore original console

    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);

}

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

// Compatibility with older stubs

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

#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

#include <cyg/hal/hal_stub.h>           // CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION

#endif

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

// Assumption: all diagnostic output must be GDB packetized unless

// this is a configuration for a stand-alone ROM system.

#if defined(CYG_HAL_STARTUP_ROM) && !defined(CYGSEM_HAL_ROM_MONITOR)

# define HAL_DIAG_USES_HARDWARE

#endif

#if (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 0)

# define __BASE ((cyg_uint16*)CYG_DEV_SERIAL_BASE_A)

#elif (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 1)

# define __BASE ((cyg_uint16*)CYG_DEV_SERIAL_BASE_B)

#else

# error "LCD driver not (yet) implemented for cme555"

#endif

static channel_data_t channel = { __BASE, 0, 0 };

#ifdef HAL_DIAG_USES_HARDWARE

void hal_diag_init(void)

{

    init_serial_channel(&channel);

}

void hal_diag_write_char(char __c)

{

    cyg_hal_plf_serial_putc(&channel, __c);

}

void hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(&channel);

}

#else  // ifdef HAL_DIAG_USES_HARDWARE

// Initialize diag port

void

hal_diag_init(void)

{

    // Init devices

    init_serial_channel(&channel);

}

void

hal_diag_write_char_serial( char c )

{

    unsigned long __state;

    HAL_DISABLE_INTERRUPTS(__state);

    cyg_hal_plf_serial_putc(&channel, c);

    HAL_RESTORE_INTERRUPTS(__state);

}

void

hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(&channel);

}

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)

        {

            char c1;

            static char hex[] = "0123456789ABCDEF";

            cyg_uint8 csum = 0;

            int i;

            hal_diag_write_char_serial('$');

            hal_diag_write_char_serial('O');

            csum += 'O';

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

            {

                char ch = line[i];

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

                char l = hex[ch&0xF];

                hal_diag_write_char_serial(h);

                hal_diag_write_char_serial(l);

                csum += h;

                csum += l;

            }

            hal_diag_write_char_serial('#');

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

            hal_diag_write_char_serial(hex[csum&0xF]);

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

            // receiving a ^C instead.

            hal_diag_read_char(&c1);

            if( c1 == '+' )

                break;              // a good acknowledge

#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT

            if( 3 == c1 ) {

                // Ctrl-C: breakpoint.

                cyg_hal_gdb_interrupt(

                    (target_register_t)__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  // ifdef HAL_DIAG_USES_HARDWARE

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

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

// End of hal_diag.c