common/aboot.c

/*
 * Copyright (c) 2009, Google Inc.
 * All rights reserved.
 *
 * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted 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 The Linux Foundation nor
 *       the names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior written
 *       permission.
 *
 * 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, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT 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.
 *
 * NOTE:
 *   Although it is very similar, this license text is not identical
 *   to the "BSD-3-Clause", therefore, DO NOT MODIFY THIS LICENSE TEXT!
 */

void cmd_flash_mmc_sparse_img(const char *arg, void *data, unsigned sz)
{
	unsigned int chunk;
	unsigned int chunk_data_sz;
	uint32_t *fill_buf = NULL;
	uint32_t fill_val;
	uint32_t chunk_blk_cnt = 0;
	sparse_header_t *sparse_header;
	chunk_header_t *chunk_header;
	uint32_t total_blocks = 0;
	unsigned long long ptn = 0;
	unsigned long long size = 0;
	int index = INVALID_PTN;
	int i;
	uint8_t lun = 0;

	index = partition_get_index(arg);
	ptn = partition_get_offset(index);
	if(ptn == 0) {
		fastboot_fail("partition table doesn't exist");
		return;
	}

	size = partition_get_size(index);
	if (ROUND_TO_PAGE(sz,511) > size) {
		fastboot_fail("size too large");
		return;
	}

	lun = partition_get_lun(index);
	mmc_set_lun(lun);

	/* Read and skip over sparse image header */
	sparse_header = (sparse_header_t *) data;
	if ((sparse_header->total_blks * sparse_header->blk_sz) > size) {
		fastboot_fail("size too large");
		return;
	}

	data += sparse_header->file_hdr_sz;
	if (sparse_header->file_hdr_sz > sizeof(sparse_header_t))
	{
		/*
		 * Skip the remaining bytes in a header that is longer than
		 * we expected.
		 */
		data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
	}

	debug("=== Sparse Image Header ===\n");
	debug("magic: 0x%x\n", sparse_header->magic);
	debug("major_version: 0x%x\n", sparse_header->major_version);
	debug("minor_version: 0x%x\n", sparse_header->minor_version);
	debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
	debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
	debug("blk_sz: %d\n", sparse_header->blk_sz);
	debug("total_blks: %d\n", sparse_header->total_blks);
	debug("total_chunks: %d\n", sparse_header->total_chunks);

	/* Start processing chunks */
	for (chunk=0; chunk<sparse_header->total_chunks; chunk++)
	{
		/* Read and skip over chunk header */
		chunk_header = (chunk_header_t *) data;
		data += sizeof(chunk_header_t);

		debug("=== Chunk Header ===\n");
		debug("chunk_type: 0x%x\n", chunk_header->chunk_type);
		debug("chunk_data_sz: 0x%x\n", chunk_header->chunk_sz);
		debug("total_size: 0x%x\n", chunk_header->total_sz);

		if (sparse_header->chunk_hdr_sz > sizeof(chunk_header_t))
		{
			/*
			 * Skip the remaining bytes in a header that is longer
			 * than we expected.
			 */
			data += (sparse_header->chunk_hdr_sz -
				 sizeof(chunk_header_t));
		}

		chunk_data_sz = sparse_header->blk_sz * chunk_header->chunk_sz;
		switch (chunk_header->chunk_type)
		{
			case CHUNK_TYPE_RAW:
			if (chunk_header->total_sz !=
			    (sparse_header->chunk_hdr_sz + chunk_data_sz))
			{
				fastboot_fail(
					"Bogus chunk size for chunk type Raw");
				return;
			}

			if (mmc_write(ptn +
				      ((uint64_t)total_blocks *
						 sparse_header->blk_sz),
				      chunk_data_sz, (unsigned int *)data))
			{
				fastboot_fail("flash write failure");
				return;
			}
			total_blocks += chunk_header->chunk_sz;
			data += chunk_data_sz;
			break;

			case CHUNK_TYPE_FILL:
			if (chunk_header->total_sz !=
			    (sparse_header->chunk_hdr_sz + sizeof(uint32_t)))
			{
				fastboot_fail(
					"Bogus chunk size for chunk type FILL");
				return;
			}

			fill_buf = (uint32_t *)
				   memalign(CACHE_LINE,
					    ROUNDUP(sparse_header->blk_sz,
						    CACHE_LINE));
			if (!fill_buf)
			{
				fastboot_fail(
					"Malloc failed for: CHUNK_TYPE_FILL");
				return;
			}

			fill_val = *(uint32_t *)data;
			data = (char *) data + sizeof(uint32_t);
			chunk_blk_cnt = chunk_data_sz / sparse_header->blk_sz;

			for (i = 0; i < (sparse_header->blk_sz / sizeof(fill_val)); i++)
			{
				fill_buf[i] = fill_val;
			}

			for (i = 0; i < chunk_blk_cnt; i++)
			{
				if (mmc_write(ptn +
					      ((uint64_t)total_blocks *
							 sparse_header->blk_sz),
					      sparse_header->blk_sz, fill_buf))
				{
					fastboot_fail("flash write failure");
					free(fill_buf);
					return;
				}

				total_blocks++;
			}

			free(fill_buf);
			break;

			case CHUNK_TYPE_DONT_CARE:
			total_blocks += chunk_header->chunk_sz;
			break;

			case CHUNK_TYPE_CRC:
			if (chunk_header->total_sz !=
			    sparse_header->chunk_hdr_sz)
			{
				fastboot_fail(
					"Bogus chunk size for chunk type Dont Care");
				return;
			}
			total_blocks += chunk_header->chunk_sz;
			data += chunk_data_sz;
			break;

			default:
			debug("Unkown chunk type: %x\n",
			      chunk_header->chunk_type);
			fastboot_fail("Unknown chunk type");
			return;
		}
	}

	debug("Wrote %d blocks, expected to write %d blocks\n",
	      total_blocks, sparse_header->total_blks);

	if (total_blocks != sparse_header->total_blks)
		fastboot_fail("sparse image write failure");

	fastboot_okay("");
	return;
}