u-boot-1.1.6下移植支持yaffs2文件系统的烧写
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博文后续
添加对nand write.yaffs和nand read.yaffs命令的支持
common/cmd_nand.c
U_BOOT_CMD(nand, 5, 1, do_nand, "nand - NAND sub-system\n", "info - show available NAND devices\n" "nand device [dev] - show or set current device\n" "nand read[.jffs2] - addr off|partition size\n" "nand write[.jffs2] - addr off|partiton size - read/write `size' bytes starting\n" " at offset `off' to/from memory address `addr'\n" "nand read.yaffs addr off size - read the `size' byte yaffs image starting\n" " at offset `off' to memory address `addr'\n" "nand write.yaffs addr off size - write the `size' byte yaffs image starting\n" " at offset `off' from memory address `addr'\n" "nand read.raw addr off size - read the `size' bytes starting\n" " at offset `off' to memory address `addr', without oob and ecc\n" "nand write.raw addr off size - write the `size' bytes starting\n" " at offset `off' from memory address `addr', without oob and ecc\n" "nand erase [clean] [off size] - erase `size' bytes from\n" " offset `off' (entire device if not specified)\n" "nand bad - show bad blocks\n" "nand dump[.oob] off - dump page\n" "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n" "nand markbad off - mark bad block at offset (UNSAFE)\n" "nand biterr off - make a bit error at offset (UNSAFE)\n" "nand lock [tight] [status] - bring nand to lock state or display locked pages\n" "nand unlock [offset] [size] - unlock section\n");
添加yaffs的两个变量，用于操作nandflash的oob控制符skipfirstblk,nocheckblk
include\nand.h
struct nand_write_options { u_char *buffer; /* memory block containing image to write */ ulong length; /* number of bytes to write */ ulong offset; /* start address in NAND */ int quiet; /* don't display progress messages */ int autoplace; /* if true use auto oob layout */ int forcejffs2; /* force jffs2 oob layout */ int forceyaffs; /* force yaffs oob layout */ int noecc; /* write without ecc */ int writeoob; /* image contains oob data */ int pad; /* pad to page size */ int blockalign; /* 1|2|4 set multiple of eraseblocks * to align to */ int skipfirstblk; /* if true, skip the first good block, * set true when write the yaffs image, */ int nocheckbadblk; /* if true, don't check bad blockes, * use them as good blockes */ };struct nand_read_options { u_char *buffer; /* memory block in which read image is written*/ ulong length; /* number of bytes to read */ ulong offset; /* start address in NAND */ int quiet; /* don't display progress messages */ int readoob; /* put oob data in image */ int noecc; /* read without ecc */ int nocheckbadblk; /* if true, don't check bad blockes, * use them as good blockes */ };添加对yaffs的读写支持,
common/cmd_nand.c
}else if ( s != NULL && !strcmp(s, ".yaffs")){ if (read) { /* read */ nand_read_options_t opts; memset(&opts, 0, sizeof(opts)); opts.buffer = (u_char*) addr; opts.length = size; opts.offset = off; opts.readoob = 1; opts.quiet = quiet; ret = nand_read_opts(nand, &opts); } else { /* write */ nand_write_options_t opts; memset(&opts, 0, sizeof(opts)); opts.buffer = (u_char*) addr; opts.length = size; opts.offset = off; /* opts.forceyaffs = 1; */ opts.noecc = 1; opts.writeoob = 1; opts.blockalign = 1; opts.quiet = quiet; opts.skipfirstblk = 1; ret = nand_write_opts(nand, &opts); } }include\nand.h
#define NANDRW_YAFFS 0x08 /* to write yaffs image */
drivers\nand_legacy\nand_legacy.c
nand_legacy_rw函数添加如下：int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf)
{
int ret = 0, n, total = 0;
char eccbuf[6];
/* eblk (once set) is the start of the erase block containing the
* data being processed.
*/
unsigned long eblk = ~0; /* force mismatch on first pass */
unsigned long erasesize = nand->erasesize;
int bfirstyaffsblk = 1;
int page;
unsigned long badblk=0, prgmblk=0;
unsigned long badblks=0, prgmblks = 0;
unsigned long allblks;
allblks = (erasesize/nand->oobblock)*(nand->oobblock+nand->oobsize);
allblks = (len + allblks - 1) / allblks;
if ((cmd & NANDRW_YAFFS) && (len % (nand->oobblock + nand->oobsize))) {
printf("Length of the yaffs image should be times of (%d +%d), now it is %d\n", nand->oobblock, nand->oobsize, len);
return -1;
}
if ((cmd & NANDRW_YAFFS) && (start % erasesize)) {
printf("Start address of the flash should be %d align\n", erasesize);
return -1;
}
if (cmd & (NANDRW_WRITE | NANDRW_YAFFS)) {
printf("Flash params: oobblock = %d, oobsize = %d, erasesize = %d\n", nand->oobblock, nand->oobsize, nand->erasesize);
printf("Programming NAND with yaffs image, length = %d\n", len);
printf(" Block Programming(addr/count) --- Block bad(addr/count) --- Block programed/All(%%)\n");
printf("------------------------------------------------------------------------------------\n");
}
drivers\nand\nand_util.c/* for yaffs */if (cmd & (NANDRW_WRITE | NANDRW_YAFFS)) {/* Do some programming, but not in the first block */ if (!bfirstyaffsblk) { prgmblk = start; prgmblks++; printf(" 0x%08x/%05d 0x%08x/%05d %05d/%05d=%02d%%\r", prgmblk, prgmblks, badblk, badblks, prgmblks, allblks, prgmblks*100/allblks); for (page = 0; (page < erasesize/nand->oobblock) && (len - page*(nand->oobblock+nand->oobsize) > 0); page++) { ret = nand_write_ecc(nand, start+page*nand->oobblock, nand->oobblock, (size_t *)&n, (u_char*)buf+page*(nand->oobblock+nand->oobsize), (u_char *)0); /* without ecc */ if (!ret) ret = nand_write_oob(nand, start+page*nand->oobblock, nand->oobsize, (size_t *)&n, (u_char*)buf+page*(nand->oobblock+nand->oobsize)+nand->oobblock); if (ret) break; } n = page * (nand->oobblock+nand->oobsize); } else { bfirstyaffsblk = 0; n = 0; start += erasesize; /* skip first block */ ret = 0; page = 0; }}drivers\nand\nand_util.c
/* force OOB layout for jffs2 or yaffs? */ if (opts->forcejffs2 || opts->forceyaffs) { struct nand_oobinfo *oobsel = opts->forcejffs2 ? &jffs2_oobinfo : &yaffs_oobinfo; if (meminfo->oobsize == 8) { if (opts->forceyaffs) { printf("YAFSS cannot operate on " "256 Byte page size\n"); goto restoreoob; } /* Adjust number of ecc bytes */ jffs2_oobinfo.eccbytes = 3; } memcpy(&meminfo->oobinfo, oobsel, sizeof(meminfo->oobinfo)); }drivers\nand\nand_util.c/* skip the first good block when wirte yaffs image */ if (skipfirstblk) { mtdoffset += erasesize_blockalign; skipfirstblk = 0; continue; }
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