    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*"
     *
     *   mdioblock.c
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *   system header files;
     *--------------------------------------------------------------------*/

    #include <stdio.h>
    #include <ctype.h>
    #include <unistd.h>
    #include <fcntl.h>
    #include <sys/stat.h>

    /*====================================================================*
     *   custom header files;
     *--------------------------------------------------------------------*/

    #include "../tools/getoptv.h"
    #include "../tools/endian.h"
    #include "../tools/number.h"
    #include "../tools/chars.h"
    #include "../tools/error.h"
    #include "../tools/flags.h"
    #include "../mdio/mdio.h"

    /*====================================================================*
     *   custom source files;
     *--------------------------------------------------------------------*/

    #ifndef MAKEFILE
    #include "../tools/getoptv.c"
    #include "../tools/putoptv.c"
    #include "../tools/version.c"
    #include "../tools/error.c"
    #include "../tools/todigit.c"
    #endif

    /*====================================================================*
     *   program variables;
     *--------------------------------------------------------------------*/

    static signed c;
    static unsigned row = 1;
    static unsigned col = 1;
    static uint16_t count = 0;
    static uint16_t instr = 0;
    static uint16_t addr;
    static uint16_t data;
    static uint16_t mask;
    static uint16_t phy;
    static uint16_t reg;

    /*====================================================================*
     *
     *   signed mygetc ();
     *
     *   fetch next character from stdin and update the file cursor;
     *
     *--------------------------------------------------------------------*/

    static signed mygetc ()

    {
    	signed c = getc (stdin);
    	if (c == '\n')
    	{
    		row++;
    		col = 0;
    	}
    	else if (~c)
    	{
    		col++;
    	}
    	return (c);
    }

    /*====================================================================*
     *
     *   uint16_t integer (unsigned radix);
     *
     *
     *--------------------------------------------------------------------*/

    static uint16_t integer (unsigned radix)

    {
    	extern signed c;
    	uint16_t value = 0;
    	unsigned digit = 0;
    	while ((digit = todigit (c)) < radix)
    	{
    		value *= radix;
    		value += digit;
    		c = mygetc ();
    	}
    	while (isspace (c))
    	{
    		c = mygetc ();
    	}
    	return (value);
    }

    /*====================================================================*
     *
     *   void assemble (flag_t flags);
     *
     *   read stdin and write stdout; convert hexadecimal input to binary
     *   MDIO register instructions;
     *
     *   the input file consists of zero or more hexadecimal instructions
     *   consisting of a phy address, register address, register data and
     *   register mask; instructions are terminated with semicolon; fields
     *   are separated by white space; scriptstyle comments are permitted
     *   between instructions but not between instruction fields;
     *
     *   the output file will consist of one 16-bit program header plus
     *   one 16-bit MDIO instructions for each input instruction; the
     *   output is padded to the nearest multiple of 32-bits;
     *
     *--------------------------------------------------------------------*/

    static void assemble (flag_t flags)

    {
    	extern signed c;
    	c = mygetc ();
    	while (c != EOF)
    	{
    		if (isspace (c))
    		{
    			do
    			{
    				c = mygetc ();
    			}
    			while (isspace (c));
    			continue;
    		}
    		if ((c == '#') || (c == ';'))
    		{
    			do
    			{
    				c = mygetc ();
    			}
    			while (nobreak (c));
    			continue;
    		}
    		phy = integer (16);
    		reg = integer (16);
    		data = integer (16);
    		mask = integer (16);
    		instr = MDIO16_INSTR (1, 1, phy, reg, 2);
    		write (STDOUT_FILENO, &instr, sizeof (instr));
    		data = HTOLE16 (data & 0xFFFF);
    		write (STDOUT_FILENO, &data, sizeof (data));
    		mask = HTOLE16 (mask & 0xFFFF);
    		write (STDOUT_FILENO, &mask, sizeof (mask));
    		count++;
    		if (_anyset (flags, MDIO_VERBOSE))
    		{
    			fprintf (stderr, "INSTR=0x%04X DATA=0x%04X MASK=0x%04X\n", instr, data, mask);
    		}
    		if ((c == ';') || (c == EOF))
    		{
    			c = mygetc ();
    			continue;
    		}
    		if (_allclr (flags, MDIO_SILENCE))
    		{
    			error (1, 0, "Illegal character or missing terminator: line %d col %d", row, col);
    		}
    	}
    	return;
    }

    /*====================================================================*
     *
     *   int main (int argc, const char * argv []);
     *
     *
     *
     *--------------------------------------------------------------------*/

    int main (int argc, const char * argv [])

    {
    	static const char * optv [] =
    	{
    		"qv",
    		"file [ file ] [ ...] > file",
    		"Atheros Clause 22 MDIO Instruction Block Assembler",
    		"q\tquiet mode",
    		"v\tverbose mode",
    		(const char *) (0)
    	};
    	flag_t flags = (flag_t)(0);
    	optind = 1;
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'q':
    			_setbits (flags, MDIO_SILENCE);
    			break;
    		case 'v':
    			_setbits (flags, MDIO_VERBOSE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	if (isatty (STDOUT_FILENO))
    	{
    		error (1, ECANCELED, "stdout must be a file or pipe");
    	}

    #if defined (WIN32)

    	setmode (STDOUT_FILENO, O_BINARY);

    #endif

    	instr = MDIO16_START (1, 0, count);
    	write (STDOUT_FILENO, &instr, sizeof (instr));
    	if (!argc)
    	{
    		assemble (flags);
    	}
    	while ((argc) && (* argv))
    	{
    		if (!freopen (* argv, "rb", stdin))
    		{
    			error (1, errno, "%s", * argv);
    		}
    		assemble (flags);
    		argc--;
    		argv++;
    	}
    	instr = MDIO16_START (1, 0, count);
    	addr = count * sizeof (instr) + sizeof (instr);
    	if ((addr % sizeof (uint32_t)))
    	{
    		uint32_t pad = 0;
    		write (STDOUT_FILENO, &pad, sizeof (pad) - addr % sizeof (pad));
    	}
    	if (!lseek (STDOUT_FILENO, 0, SEEK_SET))
    	{
    		write (STDOUT_FILENO, &instr, sizeof (instr));
    	}
    	if (_anyset (flags, MDIO_VERBOSE))
    	{
    		fprintf (stderr, "%d instructions\n", count);
    	}
    	return (0);
    }

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