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

/*====================================================================*
 *
 *   signed WriteNVM (struct plc * plc);
 *
 *   plc.h
 *
 *   write an entire .nvm file into PLC SDRAM using as many VS_WR_MEM
 *   messages as needed to complete the transfer;
 *
 *   runtime firmware must be running for this to work; the NVM file
 *   in struct plc must be opened before calling this function;
 *
 *
 *   Contributor(s):
 *      Charles Maier <cmaier@qca.qualcomm.com>
 *      Nathaniel Houghton <nhoughto@qca.qualcomm.com>
 *
 *--------------------------------------------------------------------*/

#ifndef WRITENVM_SOURCE
#define WRITENVM_SOURCE

#include <stdint.h>
#include <unistd.h>
#include <memory.h>

#include "../plc/plc.h"
#include "../tools/memory.h"
#include "../tools/error.h"
#include "../tools/files.h"

signed WriteNVM (struct plc * plc)

{
	struct channel * channel = (struct channel *)(plc->channel);
	struct message * message = (struct message *)(plc->message);

#ifndef __GNUC__
#pragma pack (push,1)
#endif

	struct __packed vs_wr_mod_request
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
		uint8_t MODULEID;
		uint8_t RESERVED;
		uint16_t MLENGTH;
		uint32_t MOFFSET;
		uint32_t MCHKSUM;
		uint8_t MBUFFER [PLC_RECORD_SIZE];
	}
	* request = (struct vs_wr_mod_request *) (message);
	struct __packed vs_wr_mod_confirm
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
		uint8_t MSTATUS;
		uint8_t MODULEID;
		uint8_t RESERVED;
		uint16_t MLENGTH;
		uint32_t MOFFSET;
	}
	* confirm = (struct vs_wr_mod_confirm *) (message);

#ifndef __GNUC__
#pragma pack (pop)
#endif

	uint16_t length = PLC_RECORD_SIZE;
	uint32_t extent = lseek (plc->NVM.file, 0, SEEK_END);
	uint32_t offset = lseek (plc->NVM.file, 0, SEEK_SET);
	Request (plc, "Write %s to scratch", plc->NVM.name);
	while (extent)
	{
		memset (message, 0, sizeof (* message));
		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
		QualcommHeader (&request->qualcomm, 0, (VS_WR_MOD | MMTYPE_REQ));
		if (length > extent)
		{
			length = extent;
		}
		if (read (plc->NVM.file, request->MBUFFER, length) != length)
		{
			error (1, errno, FILE_CANTREAD, plc->NVM.name);
		}
		request->MODULEID = VS_MODULE_MAC;
		request->RESERVED = 0;
		request->MLENGTH = HTOLE16 (length);
		request->MOFFSET = HTOLE32 (offset);
		request->MCHKSUM = checksum32 (request->MBUFFER, length, 0);
		plc->packetsize = sizeof (* request);
		if (SendMME (plc) <= 0)
		{
			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
			return (-1);
		}
		if (ReadMME (plc, 0, (VS_WR_MOD | MMTYPE_CNF)) <= 0)
		{
			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
			return (-1);
		}
		if (confirm->MSTATUS)
		{
			Failure (plc, PLC_WONTDOIT);
			return (-1);
		}
		if (LE16TOH (confirm->MLENGTH) != length)
		{
			error (PLC_EXIT (plc), 0, PLC_ERR_LENGTH);
			return (-1);
		}
		if (LE32TOH (confirm->MOFFSET) != offset)
		{
			error (PLC_EXIT (plc), 0, PLC_ERR_OFFSET);
			return (-1);
		}
		extent -= length;
		offset += length;
	}
	return (0);
}

#endif