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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.

//

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

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

//

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

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

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   nickg

// Contributors:        nickg

// 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>

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_io.h>

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

//#define CYG_KERNEL_DIAG_LCD

#define CYG_KERNEL_DIAG_SERIAL0 // For ROM start but see immediately below:

#if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)

#undef CYG_KERNEL_DIAG_SERIAL0

#undef CYG_KERNEL_DIAG_LCD

#define CYG_KERNEL_DIAG_CYGMON

#define CYG_KERNEL_DIAG_GDB

#endif

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

static cyg_uint8 leds = 0;

void hal_diag_led(int x)

{

//    return;

    leds ^= x;

    HAL_WRITE_UINT8( 0xfffff504, leds);

#if 0

    {

        int i;

        for( i = 0; i < 0x00020000; i++ );

    }

#endif    

}

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

#if defined(CYG_KERNEL_DIAG_SERIAL0) || defined(CYG_KERNEL_DIAG_CYGMON)

#define DIAG_BASE       0xfffff300

#define DIAG_SLCR       (DIAG_BASE+0x00)

#define DIAG_SLSR       (DIAG_BASE+0x04)

#define DIAG_SLDICR     (DIAG_BASE+0x08)

#define DIAG_SLDISR     (DIAG_BASE+0x0C)

#define DIAG_SFCR       (DIAG_BASE+0x10)

#define DIAG_SBRG       (DIAG_BASE+0x14)

#define DIAG_TFIFO      (DIAG_BASE+0x20)

#define DIAG_RFIFO      (DIAG_BASE+0x30)

#define BRG_T0          0x0000

#define BRG_T2          0x0100

#define BRG_T4          0x0200

#define BRG_T5          0x0300

void hal_diag_init()

{

#if defined(CYGSEM_HAL_USE_ROM_MONITOR)

// If we are using the ROM monitor, it has already

// initialized the serial line.

#else

//hal_diag_led(0x10);    

    HAL_WRITE_UINT16( DIAG_SLCR , 0x0020 );

    HAL_WRITE_UINT16( DIAG_SLDICR , 0x0000 );

    HAL_WRITE_UINT16( DIAG_SFCR , 0x0000 );

#if CYGHWR_HAL_MIPS_CPU_FREQ == 50

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 20 );    // 9600 bps

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 10 );    // 19200 bps

    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 5 );     // 38400 bps

#elif CYGHWR_HAL_MIPS_CPU_FREQ == 66

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 27 );    // 9600 bps

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T0 | 54 );    // 19200 bps

    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T0 | 27 );    // 38400 bps

#else

#error Unsupported CPU frequency

#endif

//hal_diag_led(0x10);

#endif    

}

void hal_diag_write_char_serial0( char c)

{

    CYG_WORD16 disr;

//hal_diag_led(0x20);

    for(;;)

    {

        HAL_READ_UINT16( DIAG_SLDISR , disr );

        if( disr & 0x0002 ) break;

    }

    disr = disr & ~0x0002;

    HAL_WRITE_UINT8( DIAG_TFIFO, c );

    HAL_WRITE_UINT16( DIAG_SLDISR , disr );

//hal_diag_led(0x20);

}

void hal_diag_drain_serial0(void)

{

    CYG_WORD16 disr;

    for(;;)

    {

        HAL_READ_UINT16( DIAG_SLDISR , disr );

        if( disr & 0x0002 ) break;

    }

    disr = disr & ~0x0002;

    HAL_WRITE_UINT16( DIAG_SLDISR , disr );

}

void hal_diag_read_char_serial0(char *c)

{

    CYG_WORD16 disr;

//hal_diag_led(0x40);        

    for(;;)

    {

        HAL_READ_UINT16( DIAG_SLDISR , disr );

        if( disr & 0x0001 ) break;

    }

    disr = disr & ~0x0001;

    HAL_READ_UINT8( DIAG_RFIFO, *c );

    HAL_WRITE_UINT16( DIAG_SLDISR , disr );

//hal_diag_led(0x40);

}

#if defined(CYG_KERNEL_DIAG_CYGMON)

void hal_diag_dumb_write_char(char c)

#else

void hal_diag_write_char(char c)

#endif

{

#ifdef CYG_KERNEL_DIAG_GDB    

#if 0 //defined(CYGSEM_HAL_USE_ROM_MONITOR)

    typedef void rom_write_fn(char c);

    rom_write_fn *fn = ((rom_write_fn **)0x80000100)[63];

    fn(c);

#else    

    static char line[100];

    static int pos = 0;

//    register volatile cyg_uint16 *volatile tty_status = SERIAL1_SR;    

    // No need to send CRs

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

    line[pos++] = c;

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

    {

        // 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.

        CYG_INTERRUPT_STATE oldstate;

        HAL_DISABLE_INTERRUPTS(oldstate);

        while(1)

        {

            static char hex[] = "0123456789ABCDEF";

            cyg_uint8 csum = 0;

            int i;

            char c1;

            hal_diag_write_char_serial0('$');

            hal_diag_write_char_serial0('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_serial0(h);

                hal_diag_write_char_serial0(l);

                csum += h;

                csum += l;

            }

            hal_diag_write_char_serial0('#');

            hal_diag_write_char_serial0(hex[(csum>>4)&0xF]);

            hal_diag_write_char_serial0(hex[csum&0xF]);

            hal_diag_read_char_serial0( &c1 );

            if( c1 == '+' ) break;

            {

                extern void cyg_hal_user_break(CYG_ADDRWORD *regs);

                extern cyg_bool cyg_hal_is_break(char *buf, int size);

                if( cyg_hal_is_break( &c1 , 1 ) )

                    cyg_hal_user_break( NULL );

            }

            break;

        }

        pos = 0;

        // Wait for all data from serial line to drain

        // and clear ready-to-send indication.

        hal_diag_drain_serial0();

        // And re-enable interrupts

        HAL_RESTORE_INTERRUPTS( oldstate );

    }

#endif    

#else

    hal_diag_write_char_serial0(c);

#endif    

}

void hal_diag_read_char(char *c)

{

    for(;;)

    {

#if defined(CYG_KERNEL_DIAG_GDB) && defined(CYGSEM_HAL_USE_ROM_MONITOR)

        typedef void rom_read_fn(char *c);

        rom_read_fn *fn = ((rom_read_fn **)0x80000100)[62];

        fn(c);

#else    

        hal_diag_read_char_serial0(c);

#endif    

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

        if( *c == 3 )

        {

            // Ctrl-C: breakpoint.

            extern void breakpoint(void);

            breakpoint();

            continue;

        }

#elif defined(CYGSEM_HAL_USE_ROM_MONITOR)

        if( *c == 3 )

        {

            // Ctrl-C: breakpoint.

//                HAL_BREAKPOINT(_breakinst);

            typedef void bpt_fn(void);

            bpt_fn *bfn = ((bpt_fn **)0x80000100)[61];

            bfn();

            continue;

        }

#endif

        break;

    }

}

#endif // defined(CYG_KERNEL_DIAG_SERIAL0) || defined(CYG_KERNEL_DIAG_CYGMON)

#if defined(CYG_KERNEL_DIAG_CYGMON) // only

/* This code has been imported from the BSP module. The definitions have

 * been left as-is, even though there was scope for doing more, to avoid

 * too much drift from the original sources

 */

struct bsp_comm_procs {

    void *ch_data;

    void (*__write)(void *ch_data, const char *buf, int len);

    int  (*__read)(void *ch_data, char *buf, int len);

    void (*__putc)(void *ch_data, char ch);

    int  (*__getc)(void *ch_data);

    int  (*__control)(void *ch_data, int func, ...);

};

// This is pointed to by entry BSP_NOTVEC_BSP_COMM_PROCS:

typedef struct {

    int  version;       /* version number for future expansion */

    void *__ictrl_table;

    void *__exc_table;

    void *__dbg_vector;

    void *__kill_vector;

    struct bsp_comm_procs *__console_procs;

    struct bsp_comm_procs *__debug_procs;

    void *__flush_dcache;

    void *__flush_icache;

    void *__cpu_data;

    void *__board_data;

    void *__sysinfo;

    int  (*__set_debug_comm)(int __comm_id);

    int  (*__set_console_comm)(int __comm_id);

    int  (*__set_serial_baud)(int __comm_id, int baud);

    void *__dbg_data;

    void (*__reset)(void);

    int  __console_interrupt_flag;

} bsp_shared_t;

/*

 * Core Exception vectors.

 */

#define BSP_EXC_INT         0

#define BSP_EXC_TLBMOD      1

#define BSP_EXC_TLBL        2

#define BSP_EXC_TLBS        3

#define BSP_EXC_ADEL        4

#define BSP_EXC_ADES        5

#define BSP_EXC_IBE         6

#define BSP_EXC_DBE         7

#define BSP_EXC_SYSCALL     8

#define BSP_EXC_BREAK       9

#define BSP_EXC_ILL        10

#define BSP_EXC_CPU        11

#define BSP_EXC_OV         12

#define BSP_EXC_TRAP       13

#define BSP_EXC_VCEI       14

#define BSP_EXC_FPE        15

#define BSP_EXC_RSV16      16

#define BSP_EXC_RSV17      17

#define BSP_EXC_RSV18      18

#define BSP_EXC_RSV19      19

#define BSP_EXC_RSV20      20

#define BSP_EXC_RSV21      21

#define BSP_EXC_RSV22      22

#define BSP_EXC_WATCH      23

#define BSP_EXC_RSV24      24

#define BSP_EXC_RSV25      25

#define BSP_EXC_RSV26      26

#define BSP_EXC_RSV27      27

#define BSP_EXC_RSV28      28

#define BSP_EXC_RSV29      29

#define BSP_EXC_RSV30      30

#define BSP_EXC_VCED       31

/* tx39 debug exception */

#define BSP_EXC_DEBUG      32

#define BSP_EXC_TLB        33

#define BSP_EXC_NMI        34

/*

 * Hack for eCos on tx39 to set an async breakpoint.

 */

#define BSP_VEC_BP_HOOK    35

#define BSP_EXC_XTLB       36

#define BSP_EXC_CACHE      37

#define BSP_MAX_EXCEPTIONS 38

/*

 * Another hack for tx39 eCos compatibility.

 */

#if defined(__CPU_R3900__)

#define BSP_VEC_MT_DEBUG   15

#else

#define BSP_VEC_MT_DEBUG   38

#endif

#define BSP_VEC_STUB_ENTRY 39

#define BSP_VEC_BSPDATA    40

#define BSP_VEC_MAGIC      41

#define BSP_VEC_IRQ_CHECK  42

#define BSP_VEC_PAD        43

#define NUM_VTAB_ENTRIES   44

#define BSP_MAGIC_VAL      0x55aa4321

#define SYS_interrupt 1000

// These vectors should be called with:

//

//  k0 - Exception Number

#define CYGMON_VECTOR_TABLE_BASE 0x80000100

#define CYGMON_VECTOR_TABLE ((CYG_ADDRESS *)CYGMON_VECTOR_TABLE_BASE)

#if 0 // UNUSED

static int

hal_bsp_set_debug_comm(int arg)

{

    bsp_shared_t *shared;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    if (0 != shared->__set_debug_comm) {

        return (*(shared->__set_debug_comm))(arg);

    }

    return 0;

}

static int

hal_bsp_set_console_comm(int arg)

{

    bsp_shared_t *shared;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    if (0 != shared->__set_console_comm) {

        return (*(shared->__set_console_comm))(arg);

    }

    return 0;

}

#endif // 0 UNUSED

static void bsp_trap(int trap_num);

static int

hal_bsp_console_write(const void *p, int len)

{

    bsp_shared_t *shared;

    struct bsp_comm_procs *com;

    int  magic;

    /*hal_bsp_set_console_comm(0);*/

    /* If this is not a BSP-based CygMon, return 0 */

    magic = (int)(CYGMON_VECTOR_TABLE[ BSP_VEC_MAGIC ]);

    if (magic != BSP_MAGIC_VAL)

        return 0;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    com = shared->__console_procs;

    if (0 != com) {

        shared->__console_interrupt_flag = 0;

        com->__write(com->ch_data, p, len);

        if (shared->__console_interrupt_flag) {

            /* debug interrupt; stop here */

            bsp_trap(SYS_interrupt);

        }

        return 1;

    }

    return 0;

}

static void

bsp_trap(int trap_num)

{

    asm("syscall\n");

}

static void

hal_dumb_serial_write(const char *p, int len)

{

    int i;

    for ( i = 0 ; i < len; i++ ) {

        hal_diag_dumb_write_char(p[i]);

    }

}

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.

        HAL_DISABLE_INTERRUPTS(old);

        if ( ! hal_bsp_console_write( line, pos ) )

            // then there is no function registered, just spew it out serial

            hal_dumb_serial_write( line, pos );

        pos = 0;

        // And re-enable interrupts

        HAL_RESTORE_INTERRUPTS(old);

    }

}

int

hal_diag_irq_check(int vector)

{

    typedef int irq_check_fn(int irq_nr);

    irq_check_fn *fn = (irq_check_fn *)(CYGMON_VECTOR_TABLE[ BSP_VEC_IRQ_CHECK ]);

    int  magic;

    /* If this is not a BSP-based CygMon, return 0 */

    magic = (int)(CYGMON_VECTOR_TABLE[ BSP_VEC_MAGIC ]);

    if (magic != BSP_MAGIC_VAL)

        return 0;

#if defined(CYGPKG_HAL_MIPS_TX3904)

    /* convert vector to BSP irq number */

    if (vector == 16)

        vector = 2;

    else

        vector += 3;

#endif

    return fn(vector);

}

#endif // defined(CYG_KERNEL_DIAG_CYGMON) *only*

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

#if defined(CYGPKG_HAL_MIPS_TX39_JMR3904) && defined(CYG_KERNEL_DIAG_LCD)

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

#define ISA_BASE 0xA0000000

#define LCD_DATA *(volatile unsigned char*)(0x13400000+ISA_BASE)

#define LCD_CMD *(volatile unsigned char*)(0x13000000+ISA_BASE)

#define DISPCLR 0x01   /* Display Clear */

#define ECURINC 0x06   /* Cursor Increment */

#define DISPCONT 0x08   /* Display Control */

#define BLINK 0x01   /* Blink */

#define CURON 0x02   /* Cursor ON */

#define DISPON 0x04   /* Display ON */

#define INITCMD 0x38   /* Initial Command */

#define DDRAM 0x80   /* DDRAM address */

#define LCDBUSY 0x80   /* Busy */

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

/*                                          */

/* JMZ-LCD202 LCD Display Unit              */

/*     - Sample Program (for JMR-TX3904) -  */

/*                                          */

static void readyLCD(){

    while(LCD_CMD & LCDBUSY);

}

static void outLCD(unsigned char d){

    readyLCD();

    LCD_DATA = d;

}

static void outLCD_CMD(unsigned char d){

    readyLCD();

    LCD_CMD = d;

}

static void INIT_LCD(){

    outLCD_CMD(INITCMD);

    outLCD_CMD(DISPCONT);

    outLCD_CMD(DISPCLR);

    outLCD_CMD(ECURINC);

    outLCD_CMD(DISPCONT|BLINK|CURON|DISPON);

}

#if 0

static void MAIN(){

    int     i;

    static  char   c[]="JMZ-LCD202 LCD UNIT";

    static  char   d[]="Display Test Sample";

    INIT_LCD();

    outLCD_CMD(DDRAM);

        for (i=0;i<20;i++) outLCD(c[i]);

    outLCD_CMD(DDRAM+0x40);

        for (i=0;i<20;i++) outLCD(d[i]);

}

#endif

#define LCD_LINE0       0x00

#define LCD_LINE1       0x40

#define LCD_LINE_LENGTH 20

static char lcd_line0[LCD_LINE_LENGTH+1];

static char lcd_line1[LCD_LINE_LENGTH+1];

static char *lcd_line[2] = { lcd_line0, lcd_line1 };

static int lcd_curline = 0;

static int lcd_linepos = 0;

static void lcd_dis(int add, char *string);

void hal_diag_init()

{

    int i;

//hal_diag_led(0x10);    

    INIT_LCD();

    lcd_curline = 0;

    lcd_linepos = 0;

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

        lcd_line[0][i] = lcd_line[1][i] = ' ';

    lcd_line[0][LCD_LINE_LENGTH] = lcd_line[1][LCD_LINE_LENGTH] = 0;

    lcd_dis( LCD_LINE0, lcd_line[0] );

    lcd_dis( LCD_LINE1, lcd_line[1] );

#if 0    

    {

        int     i;

        static  char   c[]="JMZ-LCD202 LCD UNIT";

        static  char   d[]="Display Test Sample";

        outLCD_CMD(DDRAM);

        for (i=0;i<20;i++) outLCD(c[i]);

        outLCD_CMD(DDRAM+0x40);

        for (i=0;i<20;i++) outLCD(d[i]);

    }

#endif

//hal_diag_led(0x10);

}

/* this routine writes the string to the LCD */

/* display after setting the address to add */

static void lcd_dis(int add, char *string)

{

    int i;

    outLCD_CMD(DDRAM+add);

    for (i=0 ; i<LCD_LINE_LENGTH ; i++) outLCD(string[i]);

}

void hal_diag_write_char( char c)

{

    int i;

//hal_diag_led(0x20);

    // Truncate long lines

    if( lcd_linepos >= LCD_LINE_LENGTH ) return;

    // ignore CR