    /*====================================================================*
     *
     *   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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   int6kbaud.c - Atheros Serial Line Device Manager;
     *
     *
     *   Contributor(s):
     *      Nathaniel Houghton <nhoughto@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

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

    #include <unistd.h>
    #include <stdlib.h>
    #include <string.h>
    #include <limits.h>

    #if defined (WIN32)
    #elif defined (__linux__)
    #	include <termios.h>
    #elif defined (__APPLE__)
    #	include <termios.h>
    #elif defined (__OpenBSD__)
    #	include <termios.h>
    #else
    #error "Unknown Environment"
    #endif

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

    #include "../tools/getoptv.h"
    #include "../tools/putoptv.h"
    #include "../tools/number.h"
    #include "../tools/memory.h"
    #include "../tools/endian.h"
    #include "../tools/symbol.h"
    #include "../tools/files.h"
    #include "../tools/flags.h"
    #include "../tools/error.h"
    #include "../tools/types.h"
    #include "../serial/serial.h"
    #include "../plc/plc.h"

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

    #ifndef MAKEFILE
    #include "../tools/getoptv.c"
    #include "../tools/putoptv.c"
    #include "../tools/version.c"
    #include "../tools/uintspec.c"
    #include "../tools/basespec.c"
    #include "../tools/synonym.c"
    #include "../tools/todigit.c"
    #include "../tools/error.c"
    #include "../tools/checksum32.c"
    #include "../tools/hexencode.c"
    #include "../tools/hexdump.c"
    #include "../tools/hexstring.c"
    #include "../tools/hexdecode.c"
    #include "../tools/synonym.c"
    #include "../tools/error.c"
    #endif

    #ifndef MAKEFILE
    #include "../serial/openport.c"
    #include "../serial/closeport.c"
    #include "../serial/serial.c"
    #endif

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

    typedef struct uart

    {
    	struct _file_ port;
    	char const * string;
    	byte mode;
    	uint64_t baudrate;
    	byte databits;
    	byte parity;
    	byte stopbits;
    	byte flowctrl;
    	unsigned flags;
    }

    uart;

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

    static const struct _term_ modes [] =

    {
    	{
    		"command",
    		"2"
    	},
    	{
    		"transparent",
    		"1"
    	}
    };

    static const struct _term_ paritybits [] =

    {
    	{
    		"even",
    		"2"
    	},
    	{
    		"none",
    		"0"
    	},
    	{
    		"odd",
    		"1"
    	}
    };

    static const struct _term_ flowctrls [] =

    {
    	{
    		"none",
    		"0"
    	},
    	{
    		"off",
    		"0"
    	},
    	{
    		"on",
    		"1"
    	}
    };

    /*====================================================================*
     *   program constants;
     *--------------------------------------------------------------------*/

    #define MODES 		(sizeof (modes) / sizeof (struct _term_))
    #define PARITYBITS 	(sizeof (paritybits) / sizeof (struct _term_))
    #define FLOWCTRLS 	(sizeof (flowctrls) / sizeof (struct _term_))

    /*====================================================================*
     *
     *   void at_command (struct uart * uart);
     *
     *--------------------------------------------------------------------*/

    static void at_command (struct uart * uart)

    {
    	clearcommand ();
    	while (*uart->string)
    	{
    		insert (*uart->string++);
    	}
    	insert ('\r');
    	sendcommand (&uart->port, uart->flags);
    	readcommand (&uart->port, uart->flags);
    	return;
    }

    /*====================================================================*
     *
     *   void at_wake (struct uart * uart);
     *
     *   send wake command "+++" to enter command mode;
     *
     *--------------------------------------------------------------------*/

    static void at_wake (struct uart * uart)

    {
    	clearcommand ();
    	insert ('+');
    	insert ('+');
    	insert ('+');
    	sendcommand (&uart->port, uart->flags);
    	readcommand (&uart->port, uart->flags);
    	mustbe ('O');
    	mustbe ('K');
    	mustbe ('\r');
    	return;
    }

    /*====================================================================*
     *
     *   void atbr (struct uart * uart);
     *
     *   set serial line parameters;
     *
     *--------------------------------------------------------------------*/

    static void atbr (struct uart * uart)

    {
    	clearcommand ();
    	insert ('A');
    	insert ('T');
    	insert ('B');
    	insert ('R');
    	decode (&uart->mode, sizeof (uart->mode));
    	insert (',');
    	uart->baudrate = HTOBE64 (uart->baudrate);
    	decode (&uart->baudrate, sizeof (uart->baudrate));
    	uart->baudrate = BE64TOH (uart->baudrate);
    	insert (',');
    	decode (&uart->databits, sizeof (uart->databits));
    	insert (',');
    	decode (&uart->parity, sizeof (uart->parity));
    	insert (',');
    	decode (&uart->stopbits, sizeof (uart->stopbits));
    	insert (',');
    	decode (&uart->flowctrl, sizeof (uart->flowctrl));
    	insert ('\r');
    	sendcommand (&uart->port, uart->flags);
    	readcommand (&uart->port, uart->flags);
    	mustbe ('O');
    	mustbe ('K');
    	mustbe ('\r');
    	return;
    }

    /*====================================================================*
     *
     *   void manager (struct uart * uart);
     *
     *   examine flagword in struct uart and perform requested operations
     *   in the order that bits are tested; the order that bits are tested
     *   may be changed as needed;
     *
     *--------------------------------------------------------------------*/

    static void manager (struct uart * uart)

    {
    	if (_anyset (uart->flags, UART_WAKE))
    	{
    		at_wake (uart);
    	}
    	if (_anyset (uart->flags, UART_COMMAND))
    	{
    		at_command (uart);
    	}
    	if (_anyset (uart->flags, UART_ATBR))
    	{
    		atbr (uart);
    	}
    	return;
    }

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

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

    {
    	static char const * optv [] =
    	{
    		"B:c:D:F:m:p:P:q:S:uvw",
    		"",
    		"Atheros Serial Line Device Settings",
    		"B n\tbaud rate is (n) [" LITERAL (UART_BAUDRATE) "]",
    		"c s\tsend custom serial line command (s)",
    		"D n\tuse (n) data bits [" LITERAL (UART_DATABITS) "]",
    		"F n\tflow control is (n) ["LITERAL (UART_FLOWCTRL) "]",
    		"m n\tcommand mode is (n)",
    		"p f\tserial port is (f) [" DEVICE "]",
    		"P n\tuse (n) parity bits [" LITERAL (UART_PARITY) "]",
    		"q\tquiet mode",
    		"S n\tuse (n) stop bits [" LITERAL (UART_STOPBITS) "]",
    		"u\tforce default host port settings [115200 8N1]",
    		"v\tverbose mode",
    		"w\twake device [+++]",
    		(char const *) (0)
    	};
    	struct uart uart =
    	{
    		{
    			0,
    			DEVICE
    		},
    		(char *)(0),
    		UART_MODE,
    		UART_BAUDRATE,
    		UART_DATABITS,
    		UART_PARITY,
    		UART_STOPBITS,
    		UART_FLOWCTRL,
    		0
    	};
    	signed c;
    	if (getenv (UART_PORT))
    	{
    		uart.port.name = strdup (getenv (UART_PORT));
    	}
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'B':
    			_setbits (uart.flags, UART_ATBR);
    			uart.baudrate = (uint64_t)(uintspec (optarg, 1, ULONG_MAX));
    			break;
    		case 'c':
    			_setbits (uart.flags, UART_COMMAND);
    			uart.string = optarg;
    			break;
    		case 'D':
    			_setbits (uart.flags, UART_ATBR);
    			uart.databits = (byte)(uintspec (optarg, 7, 8));
    			break;
    		case 'F':
    			_setbits (uart.flags, UART_ATBR);
    			uart.flowctrl = (byte)(uintspec (synonym (optarg, flowctrls, FLOWCTRLS), 0, UCHAR_MAX));
    			break;
    		case 'm':
    			_setbits (uart.flags, UART_ATBR);
    			uart.mode = (byte)(uintspec (synonym (optarg, modes, MODES), 0, UCHAR_MAX));
    		case 'P':
    			_setbits (uart.flags, UART_ATBR);
    			uart.parity = (byte)(uintspec (synonym (optarg, paritybits, PARITYBITS), 0, UCHAR_MAX));
    			break;
    		case 'q':
    			_setbits (uart.flags, UART_SILENCE);
    			break;
    		case 'p':
    			uart.port.name = optarg;
    			break;
    		case 'S':
    			_setbits (uart.flags, UART_ATBR);
    			uart.stopbits = (unsigned)(uintspec (optarg, 1, 2));
    			break;
    		case 'u':
    			_setbits (uart.flags, UART_DEFAULT);
    			break;
    		case 'v':
    			_setbits (uart.flags, UART_VERBOSE);
    			break;
    		case 'w':
    			_setbits (uart.flags, UART_WAKE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	if (argc)
    	{
    		error (1, ENOTSUP, ERROR_TOOMANY);
    	}
    	openport (&uart.port, uart.flags);
    	manager (&uart);
    	closeport (&uart.port);
    	return (0);
    }

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