339 lines
10 KiB
C
339 lines
10 KiB
C
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/*
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* (C) Copyright 2007-2013
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Jerry Wang <wangflord@allwinnertech.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <sparse_format.h>
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#include "sparse.h"
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#include "../sprite_verify.h"
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#define SPARSE_FORMAT_TYPE_TOTAL_HEAD 0xff00
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#define SPARSE_FORMAT_TYPE_CHUNK_HEAD 0xff01
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#define SPARSE_FORMAT_TYPE_CHUNK_DATA 0xff02
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#define SPARSE_FORMAT_TYPE_CHUNK_FILL_DATA 0xff03
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static uint android_format_checksum;
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static uint sparse_format_type;
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static uint chunk_count;
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static int last_rest_size;
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static int chunk_length;
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static uint flash_start;
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static sparse_header_t globl_header;
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static uint total_chunks;
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/*
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************************************************************************************************************
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*
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* unsparse_probe
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*
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* 函数名称：
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*
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* 参数列表：
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*
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* 返回值 ：
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*
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* 说明 ：
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*
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*
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************************************************************************************************************
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*/
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int unsparse_probe(char *source, uint length, uint android_format_flash_start)
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{
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sparse_header_t *header = (sparse_header_t*) source;
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if (header->magic != SPARSE_HEADER_MAGIC)
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{
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printf("sparse: bad magic\n");
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return ANDROID_FORMAT_BAD;
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}
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if ((header->major_version != SPARSE_HEADER_MAJOR_VER) ||
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(header->file_hdr_sz != sizeof(sparse_header_t)) ||
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(header->chunk_hdr_sz != sizeof(chunk_header_t)))
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{
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printf("sparse: incompatible format\n");
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return ANDROID_FORMAT_BAD;
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}
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android_format_checksum = 0;
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last_rest_size = 0;
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chunk_count = 0;
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chunk_length = 0;
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sparse_format_type = SPARSE_FORMAT_TYPE_TOTAL_HEAD;
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flash_start = android_format_flash_start;
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total_chunks = header->total_chunks;
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return ANDROID_FORMAT_DETECT;
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}
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/*
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************************************************************************************************************
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*
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* DRAM_Write
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*
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* 函数名称：
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*
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* 参数列表：
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*
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* 返回值 ：
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*
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* 说明 ：
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*
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*
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************************************************************************************************************
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*/
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int unsparse_direct_write(void *pbuf, uint length)
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{
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int unenough_length;
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int this_rest_size;
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int tmp_down_size;
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char *tmp_buf, *tmp_dest_buf;
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chunk_header_t *chunk;
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//首先计算传进的数据的校验和
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android_format_checksum += add_sum(pbuf, length);
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this_rest_size = last_rest_size + length;
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tmp_buf = (char *)pbuf - last_rest_size;
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last_rest_size = 0;
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while(this_rest_size > 0)
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{
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switch(sparse_format_type)
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{
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case SPARSE_FORMAT_TYPE_TOTAL_HEAD:
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{
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memcpy(&globl_header, tmp_buf, sizeof(sparse_header_t));
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this_rest_size -= sizeof(sparse_header_t);
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tmp_buf += sizeof(sparse_header_t);
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_HEAD;
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break;
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}
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case SPARSE_FORMAT_TYPE_CHUNK_HEAD:
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{
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if(this_rest_size < sizeof(chunk_header_t))
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{
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printf("sparse: chunk head data is not enough\n");
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last_rest_size = this_rest_size;
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tmp_dest_buf = (char *)pbuf - this_rest_size;
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memcpy(tmp_dest_buf, tmp_buf, this_rest_size);
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this_rest_size = 0;
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break;
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}
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chunk = (chunk_header_t *)tmp_buf;
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/* move to next chunk */
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tmp_buf += sizeof(chunk_header_t); //此时tmp_buf已经指向下一个chunk或者data起始地址
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this_rest_size -= sizeof(chunk_header_t); //剩余的数据长度
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chunk_length = chunk->chunk_sz * globl_header.blk_sz; //当前数据块需要写入的数据长度
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printf("chunk %d(%d)\n", chunk_count ++, total_chunks);
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switch (chunk->chunk_type)
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{
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case CHUNK_TYPE_RAW:
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if (chunk->total_sz != (chunk_length + sizeof(chunk_header_t)))
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{
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printf("sparse: bad chunk size for chunk %d, type Raw\n", chunk_count);
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return -1;
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}
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//这里不处理数据部分，转到下一个状态
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_DATA;
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break;
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case CHUNK_TYPE_FILL:
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if(chunk->total_sz != sizeof(chunk_header_t) + sizeof(u32))
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{
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printf("spase : bad chunk size for chunk ,type FILL \n");
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return -1;
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}
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_FILL_DATA;
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break;
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case CHUNK_TYPE_DONT_CARE:
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if (chunk->total_sz != sizeof(chunk_header_t))
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{
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printf("sparse: bogus DONT CARE chunk\n");
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return -1;
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}
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flash_start += (chunk_length>>9);
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_HEAD;
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break;
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default:
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printf("sparse: unknown chunk ID %x\n", chunk->chunk_type);
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return -1;
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}
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break;
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}
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case SPARSE_FORMAT_TYPE_CHUNK_DATA:
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{
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//首先判断数据是否足够当前chunk所需,如果不足，则计算出还需要的数据长度
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unenough_length = (chunk_length >= this_rest_size)? (chunk_length - this_rest_size):0;
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if(!unenough_length)
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{
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//数据足够，直接写入
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if(!sunxi_sprite_write(flash_start, chunk_length>>9, tmp_buf))
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{
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printf("sparse: flash write failed\n");
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return -1;
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}
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if(chunk_length & 511)
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{
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printf("data is not sector align 0\n");
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return -1;
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}
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flash_start += (chunk_length>>9);
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tmp_buf += chunk_length;
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this_rest_size -= chunk_length;
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chunk_length = 0;
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_HEAD;
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}
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else //存在缺失数据的情况
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{
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if(this_rest_size < 8 * 1024) //先看已有数据是否不足8k
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{
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//当不足时，把这笔数据放到下一笔数据的前部，等待下一次处理
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tmp_dest_buf = (char *)pbuf - this_rest_size;
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memcpy(tmp_dest_buf, tmp_buf, this_rest_size);
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last_rest_size = this_rest_size;
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this_rest_size = 0;
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break;
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}
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//当已有数据超过16k时
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//当缺失数据长度不足4k时,可能只缺几十个字节
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if(unenough_length < 4 * 1024)
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{
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//采用拼接方法，先烧写部分已有数据，然后在下一次把未烧写的已有数据和缺失数据一起烧录
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tmp_down_size = this_rest_size + unenough_length - 4 * 1024;
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}
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else //这里处理缺失数据超过8k(包含)的情况,同时已有数据也超过16k
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{
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//直接烧录当前全部数据;
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tmp_down_size = this_rest_size & (~(512 -1)); //扇区对齐
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}
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if(!sunxi_sprite_write(flash_start, tmp_down_size>>9, tmp_buf))
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{
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printf("sparse: flash write failed\n");
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return -1;
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}
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if(tmp_down_size & 511)
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{
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printf("data is not sector align 1\n");
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return -1;
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}
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tmp_buf += tmp_down_size;
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flash_start += (tmp_down_size>>9);
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chunk_length -= tmp_down_size;
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this_rest_size -= tmp_down_size;
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tmp_dest_buf = (char *)pbuf - this_rest_size;
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memcpy(tmp_dest_buf, tmp_buf, this_rest_size);
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last_rest_size = this_rest_size;
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this_rest_size = 0;
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_DATA;
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}
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break;
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}
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case SPARSE_FORMAT_TYPE_CHUNK_FILL_DATA:
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{
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u32 fillbuf[1024];
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u32 file_val = 0;
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u32 ii = 0;
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if(this_rest_size >= 4)
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{
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this_rest_size -= sizeof(u32);
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file_val = *(int *)tmp_buf;
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if (chunk_length & 511) {
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printf("fill data is not sector align 0\n");
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return -1;
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}
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for (ii = 0; ii < sizeof(fillbuf)/sizeof(fillbuf[0]); ii++)
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fillbuf[ii] = file_val;
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for (ii = 0; ii < (chunk_length>>12); ii++) {
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if (!sunxi_sprite_write(flash_start, 8, fillbuf)) {
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printf("sparse: fill data write failed\n");
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return -1;
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}
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flash_start += 8;
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}
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tmp_buf += sizeof(u32);
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_HEAD;
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}
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else
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{
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tmp_dest_buf = (char *)pbuf - this_rest_size;
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memcpy(tmp_dest_buf,tmp_buf,this_rest_size);
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last_rest_size = this_rest_size;
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this_rest_size = 0;
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sparse_format_type = SPARSE_FORMAT_TYPE_CHUNK_FILL_DATA;
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}
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break;
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}
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default:
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{
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printf("sparse: unknown status\n");
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return -1;
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}
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}
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}
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return 0;
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}
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/*
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************************************************************************************************************
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*
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* unsparse_checksum
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*
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* 函数名称：
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*
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|||
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* 参数列表：
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*
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* 返回值 ：
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*
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|||
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* 说明 ：
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*
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*
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************************************************************************************************************
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*/
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uint unsparse_checksum(void)
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{
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return android_format_checksum;
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}
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