static int splash_load_from_nand(u32 bmp_load_addr)
{
struct bmp_header *bmp_hdr;
int res, splash_screen_nand_offset = 0x100000;
size_t bmp_size, bmp_header_size = sizeof(struct bmp_header);
if (bmp_load_addr + bmp_header_size >= gd->start_addr_sp)
goto splash_address_too_high;
res = nand_read_skip_bad(&nand_info[nand_curr_device],
splash_screen_nand_offset, &bmp_header_size,
NULL, nand_info[nand_curr_device].size,
(u_char *)bmp_load_addr);
if (res < 0)
return res;
bmp_hdr = (struct bmp_header *)bmp_load_addr;
bmp_size = le32_to_cpu(bmp_hdr->file_size);
if (bmp_load_addr + bmp_size >= gd->start_addr_sp)
goto splash_address_too_high;
return nand_read_skip_bad(&nand_info[nand_curr_device],
splash_screen_nand_offset, &bmp_size,
NULL, nand_info[nand_curr_device].size,
(u_char *)bmp_load_addr);
splash_address_too_high:
printf("Error: splashimage address too high. Data overwrites U-Boot "
"and/or placed beyond DRAM boundaries.\n");
return -1;
}
static int nand_imls_fitimage(nand_info_t *nand, int nand_dev, loff_t off,
size_t len)
{
void *imgdata;
int ret;
imgdata = malloc(len);
if (!imgdata) {
printf("May be a FIT Image at NAND device %d offset %08llX:\n",
nand_dev, off);
printf(" Low memory(cannot allocate memory for image)\n");
return -ENOMEM;
}
ret = nand_read_skip_bad(nand, off, &len,
imgdata);
if (ret < 0 && ret != -EUCLEAN) {
free(imgdata);
return ret;
}
if (!fit_check_format(imgdata)) {
free(imgdata);
return 0;
}
printf("FIT Image at NAND device %d offset %08llX:\n", nand_dev, off);
fit_print_contents(imgdata);
free(imgdata);
return 0;
}
int readenv(size_t offset, u_char * buf)
{
size_t end = offset + CONFIG_ENV_RANGE;
size_t amount_loaded = 0;
size_t blocksize, len;
u_char *char_ptr;
blocksize = nand_info[0].erasesize;
if (!blocksize)
return 1;
len = min(blocksize, CONFIG_ENV_SIZE);
while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[0], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_loaded];
if (nand_read_skip_bad(&nand_info[0], offset, &len, char_ptr))
return 1;
offset += blocksize;
amount_loaded += len;
}
}
if (amount_loaded != CONFIG_ENV_SIZE)
return 1;
return 0;
}
static int splash_nand_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
{
return nand_read_skip_bad(nand_info[nand_curr_device], offset,
&read_size, NULL,
nand_info[nand_curr_device]->size,
(u_char *)bmp_load_addr);
}
static int splash_nand_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
{
struct mtd_info *mtd = get_nand_dev_by_index(nand_curr_device);
return nand_read_skip_bad(mtd, offset,
&read_size, NULL,
mtd->size,
(u_char *)bmp_load_addr);
}
static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
loff_t start, lim;
size_t count, actual;
int ret;
nand_info_t *nand;
/* if buf == NULL return total size of the area */
if (buf == NULL) {
*len = dfu->data.nand.size;
return 0;
}
start = dfu->data.nand.start + offset + dfu->bad_skip;
lim = dfu->data.nand.start + dfu->data.nand.size - start;
count = *len;
if (nand_curr_device < 0 ||
nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
printf("%s: invalid nand device\n", __func__);
return -1;
}
nand = &nand_info[nand_curr_device];
if (op == DFU_OP_READ)
ret = nand_read_skip_bad(nand, start, &count, &actual,
lim, buf);
else
ret = nand_write_skip_bad(nand, start, &count, &actual,
lim, buf, 0);
if (ret != 0) {
printf("%s: nand_%s_skip_bad call failed at %llx!\n",
__func__, op == DFU_OP_READ ? "read" : "write",
start);
return ret;
}
/*
* Find out where we stopped writing data. This can be deeper into
* the NAND than we expected due to having to skip bad blocks. So
* we must take this into account for the next write, if any.
*/
if (actual > count)
dfu->bad_skip += actual - count;
return ret;
}
static int load_devicetree(void)
{
int rc;
loff_t dtbsize;
u32 dtbaddr = env_get_ulong("dtbaddr", 16, 0UL);
if (dtbaddr == 0) {
printf("%s: don't have a valid <dtbaddr> in env!\n", __func__);
return -1;
}
#ifdef CONFIG_NAND
dtbsize = 0x20000;
rc = nand_read_skip_bad(get_nand_dev_by_index(0), 0x40000,
(size_t *)&dtbsize,
NULL, 0x20000, (u_char *)dtbaddr);
#else
char *dtbname = env_get("dtb");
char *dtbdev = env_get("dtbdev");
char *dtbpart = env_get("dtbpart");
if (!dtbdev || !dtbpart || !dtbname) {
printf("%s: <dtbdev>/<dtbpart>/<dtb> missing.\n", __func__);
return -1;
}
if (fs_set_blk_dev(dtbdev, dtbpart, FS_TYPE_EXT)) {
puts("load_devicetree: set_blk_dev failed.\n");
return -1;
}
rc = fs_read(dtbname, (u32)dtbaddr, 0, 0, &dtbsize);
#endif
if (rc == 0) {
gd->fdt_blob = (void *)dtbaddr;
gd->fdt_size = dtbsize;
debug("loaded %d bytes of dtb onto 0x%08x\n",
(u32)dtbsize, (u32)gd->fdt_blob);
return dtbsize;
}
printf("%s: load dtb failed!\n", __func__);
return -1;
}
static int nand_imls_legacyimage(nand_info_t *nand, int nand_dev, loff_t off,
size_t len)
{
void *imgdata;
int ret;
imgdata = malloc(len);
if (!imgdata) {
printf("May be a Legacy Image at NAND device %d offset %08llX:\n",
nand_dev, off);
printf(" Low memory(cannot allocate memory for image)\n");
return -ENOMEM;
}
ret = nand_read_skip_bad(nand, off, &len,
imgdata);
if (ret < 0 && ret != -EUCLEAN) {
free(imgdata);
return ret;
}
if (!image_check_hcrc(imgdata)) {
free(imgdata);
return 0;
}
printf("Legacy Image at NAND device %d offset %08llX:\n",
nand_dev, off);
image_print_contents(imgdata);
puts(" Verifying Checksum ... ");
if (!image_check_dcrc(imgdata))
puts("Bad Data CRC\n");
else
puts("OK\n");
free(imgdata);
return 0;
}
int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
int i, dev, ret = 0;
ulong addr, off;
size_t size;
char *cmd, *s;
nand_info_t *nand;
#ifdef CONFIG_SYS_NAND_QUIET
int quiet = CONFIG_SYS_NAND_QUIET;
#else
int quiet = 0;
#endif
const char *quiet_str = getenv("quiet");
/* at least two arguments please */
if (argc < 2)
goto usage;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
cmd = argv[1];
if (strcmp(cmd, "info") == 0) {
putc('\n');
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (nand_info[i].name)
nand_print_info(i);
}
return 0;
}
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
putc('\n');
if ((nand_curr_device < 0) ||
(nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE))
puts("no devices available\n");
else
nand_print_info(nand_curr_device);
return 0;
}
dev = (int)simple_strtoul(argv[2], NULL, 10);
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[dev].name) {
puts("No such device\n");
return 1;
}
printf("Device %d: %s", dev, nand_info[dev].name);
puts("... is now current device\n");
nand_curr_device = dev;
#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
/*
* Select the chip in the board/cpu specific driver
*/
board_nand_select_device(nand_info[dev].priv, dev);
#endif
return 0;
}
if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
strncmp(cmd, "dump", 4) != 0 &&
strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
strcmp(cmd, "biterr") != 0 &&
strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0
#ifdef CONFIG_ENV_OFFSET_OOB
&& strcmp(cmd, "env.oob") != 0
#endif
)
goto usage;
#ifdef CONFIG_ENV_OFFSET_OOB
/* this command operates only on the first nand device */
if (strcmp(cmd, "env.oob") == 0) {
return do_nand_env_oob(cmdtp, &nand_info[0],
argc - 1, argv + 1);
}
#endif
/* the following commands operate on the current device */
if (nand_curr_device < 0 || nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
puts("\nno devices available\n");
return 1;
}
nand = &nand_info[nand_curr_device];
if (strcmp(cmd, "bad") == 0) {
printf("\nDevice %d bad blocks:\n", nand_curr_device);
for (off = 0; off < nand->size; off += nand->erasesize)
if (nand_block_isbad(nand, off))
printf(" %08lx\n", off);
return 0;
}
/*
* Syntax is:
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
nand_erase_options_t opts;
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > 2 && !strcmp("clean", argv[2]);
int o = clean ? 3 : 2;
int scrub = !strcmp(cmd, "scrub");
printf("\nNAND %s: ", scrub ? "scrub" : "erase");
/* skip first two or three arguments, look for offset and size */
if (arg_off_size(argc - o, argv + o, nand, &off, &size) != 0)
return 1;
memset(&opts, 0, sizeof(opts));
opts.offset = off;
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
if (scrub) {
puts("Warning: "
"scrub option will erase all factory set "
"bad blocks!\n"
" "
"There is no reliable way to recover them.\n"
" "
"Use this command only for testing purposes "
"if you\n"
" "
"are sure of what you are doing!\n"
"\nReally scrub this NAND flash? <y/N>\n");
if (getc() == 'y') {
puts("y");
if (getc() == '\r')
opts.scrub = 1;
else {
puts("scrub aborted\n");
return -1;
}
} else {
puts("scrub aborted\n");
return -1;
}
}
ret = nand_erase_opts(nand, &opts);
printf("%s\n", ret ? "ERROR" : "OK");
return ret == 0 ? 0 : 1;
}
if (strncmp(cmd, "dump", 4) == 0) {
if (argc < 3)
goto usage;
s = strchr(cmd, '.');
off = (int)simple_strtoul(argv[2], NULL, 16);
if (s != NULL && strcmp(s, ".oob") == 0)
ret = nand_dump(nand, off, 1);
else
ret = nand_dump(nand, off, 0);
return ret == 0 ? 1 : 0;
}
if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
int read;
if (argc < 4)
goto usage;
addr = (ulong)simple_strtoul(argv[2], NULL, 16);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
return 1;
s = strchr(cmd, '.');
if (!s || !strcmp(s, ".jffs2") ||
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(nand, off, &size,
(u_char *)addr);
else
ret = nand_write_skip_bad(nand, off, &size,
(u_char *)addr);
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (u8 *)addr,
.ooblen = size,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
} else {
int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i, dev, ret = 0;
uint32_t addr, cmp_addr;
uint64_t off;
uint64_t size;
char *cmd, *s;
nand_info_t *nand;
#ifdef CONFIG_SYS_NAND_QUIET
int quiet = CONFIG_SYS_NAND_QUIET;
#else
int quiet = 0;
#endif
const char *quiet_str = getenv("quiet");
/* at least two arguments please */
if (argc < 2)
goto usage;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
cmd = argv[1];
if (strcmp(cmd, "info") == 0) {
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (nand_info[i].name)
nand_print_info(i);
}
return 0;
}
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
putc('\n');
if ((nand_curr_device < 0) ||
(nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE))
puts("no devices available\n");
else
nand_print_info(nand_curr_device);
return 0;
}
dev = (int)simple_strtoul(argv[2], NULL, 10);
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[dev].name) {
puts("No such device\n");
return 1;
}
printf("Device %d: %s", dev, nand_info[dev].name);
puts("... is now current device\n");
nand_curr_device = dev;
#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
/*
* Select the chip in the board/cpu specific driver
*/
board_nand_select_device(nand_info[dev].priv, dev);
#endif
return 0;
}
if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
strncmp(cmd, "dump", 4) != 0 &&
strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
strcmp(cmd, "biterr") != 0 && strcmp(cmd, "pattern") != 0 &&
strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
goto usage;
/* the following commands operate on the current device */
if (nand_curr_device < 0 || nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
puts("\nno devices available\n");
return 1;
}
nand = &nand_info[nand_curr_device];
if (strcmp(cmd, "bad") == 0) {
printf("\nDevice %d bad blocks:\n", nand_curr_device);
for (off = 0; off < nand->size; off += nand->erasesize)
if (nand_block_isbad(nand, off))
printf(" %12llx\n", off);
return 0;
}
/*
* Syntax is:
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
nand_erase_options_t opts;
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > 2 && !strcmp("clean", argv[2]);
int o = clean ? 3 : 2;
int scrub = !strcmp(cmd, "scrub");
printf("\nNAND %s: ", scrub ? "scrub" : "erase");
/* skip first two or three arguments, look for offset and size */
if (arg_off_size(argc - o, argv + o, nand, &off, &size) != 0)
return 1;
memset(&opts, 0, sizeof(opts));
opts.offset = off;
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
if (scrub) {
puts("Warning: "
"scrub option will erase all factory set "
"bad blocks!\n"
" "
"There is no reliable way to recover them.\n"
" "
"Use this command only for testing purposes "
"if you\n"
" "
"are sure of what you are doing!\n"
"\nReally scrub this NAND flash? <y/N>\n");
if (getc() == 'y' && getc() == '\r') {
opts.scrub = 1;
} else {
puts("scrub aborted\n");
return -1;
}
}
ret = nand_erase_opts(nand, &opts);
printf("%s\n", ret ? "ERROR" : "OK");
return ret == 0 ? 0 : 1;
}
if (strncmp(cmd, "dump", 4) == 0) {
if (argc < 3)
goto usage;
s = strchr(cmd, '.');
off = simple_strtoull(argv[2], NULL, 16);
if (s != NULL && strcmp(s, ".oob") == 0)
ret = nand_dump(nand, off, 1);
else
ret = nand_dump(nand, off, 0);
return ret == 0 ? 1 : 0;
}
if (strncmp(cmd, "pattern", 4) == 0) {
int chunk_num;
uint64_t offset, chunk64, cmp64;
nand_erase_options_t opts;
memset(&opts, 0, sizeof(opts));
// nand pattern addr cmp_addr chunk_size
// 0 1 2 3 4
if (argc < 5)
goto usage;
addr = simple_strtoul(argv[2], NULL, 16);
cmp_addr = simple_strtoul(argv[3], NULL, 16);
chunk64 = simple_strtoull(argv[4], NULL, 16);
cmp64 = chunk64;
chunk_num = (int) (nand->size / chunk64);
printf("NAND size [0x%llx], chunk size [0x%llx], number of chunks [%d]\n", nand->size, chunk64, chunk_num);
printf("Erasing all chip...\n");
opts.offset = 0;
opts.length = nand->size;
opts.jffs2 = 0;
opts.quiet = 0;
opts.scrub = 0;
if (nand_erase_opts(nand, &opts) != 0) {
printf("[FAILED]\n");
return 1;
} else {
printf("[OK]\n");
}
offset = 0;
while(offset < nand->size) {
printf("0x%010llx:", offset);
// printf("\tB:");
// if (nand_block_isbad(nand, i*chunk_size & ~(nand->erasesize - 1))) {
// printf("[V]\n");
// continue;
// } else {
// printf("[X]");
// }
// size_include_bad = get_len_incl_bad (nand, offset, chunk_size);
// opts.offset = offset;
// opts.length = size_include_bad;
// opts.quiet = 1;
// printf("\tE:");
// if (nand_erase_opts(nand, &opts) != 0) {
// printf("[X]\n");
// return 1;
// } else {
// printf("[V]");
// }
printf("\tW:");
chunk64 = cmp64;
if (nand_write_skip_bad(nand, offset, &chunk64, (u_char *)addr) != 0) {
printf("[X]\n");
return 1;
} else {
printf("[V]");
}
printf("\tR:");
chunk64 = cmp64;
if (nand_read_skip_bad(nand, offset, &chunk64, (u_char *)cmp_addr) != 0) {
printf("[X]\n");
return 1;
} else {
printf("[V]");
}
printf("\tC:");
if (memcmp((void *)addr, (void *)cmp_addr, cmp64) != 0) {
printf("[X]\n");
return 1;
} else {
printf("[V]");
}
printf("\n");
if (ctrlc()) {
puts ("\nAbort\n");
return (-1);
}
offset += get_len_incl_bad (nand, offset, cmp64);
}
printf("NAND Pattern Test PASSED!\n");
return 0;
}
if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
int read;
if (argc < 4)
goto usage;
addr = simple_strtoul(argv[2], NULL, 16);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
return 1;
s = strchr(cmd, '.');
if (!s || !strcmp(s, ".jffs2") ||
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(nand, off, &size,
(u_char *)addr);
else
ret = nand_write_skip_bad(nand, off, &size,
(u_char *)addr);
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (uint8_t *)addr,
.ooblen = size,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
} else {
int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i, dev, ret = 0;
ulong addr;
loff_t off, size;
char *cmd, *s;
nand_info_t *nand;
#ifdef CONFIG_SYS_NAND_QUIET
int quiet = CONFIG_SYS_NAND_QUIET;
#else
int quiet = 0;
#endif
const char *quiet_str = getenv("quiet");
#if ((defined CONFIG_AML_NAND_KEY) || (defined MX_REVD) || (defined CONFIG_SECURE_NAND))
int chip_num , tmp_chip_num, error;
nand = nand_info[nand_curr_device];
struct mtd_info *mtd =nand;
struct aml_nand_chip *aml_chip = mtd_to_nand_chip(nand);
#endif
/* at least two arguments please */
if (argc < 2)
goto usage;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
cmd = argv[1];
#ifdef CONFIG_AML_NAND_KEY
if (strcmp(cmd, "key") == 0){
aml_chip->key_protect = 1; //force nand key can be erased
return 0;
}
#endif
#ifdef CONFIG_SECURE_NAND
if (strcmp(cmd, "secure") == 0){
aml_chip->secure_protect = 1; //force nand key can be erased
return 0;
}
#endif
#ifdef CONFIG_SECURE_NAND
if (strcmp(cmd, "secure") == 0){
aml_chip->secure_protect = 1; //force nand key can be erased
return 0;
}
#endif
if(strcmp(cmd, "exist") == 0){
if(nand_info[1]){
printf("nand exist return 0\n");
return 0;
}
else{
printf("nand exist return 1\n");
return 1;
}
}
#ifdef MX_REVD
if (strcmp(cmd, "errstat") == 0){
printk("checking chiprev here\n");
if(aml_chip->err_sts == NAND_CHIP_REVB_HY_ERR){
printk("Must use RevD chip for Hynix 26nm/20nm nand boot without SPI!!!\n");
return NAND_CHIP_REVB_HY_ERR;
}
return 0;
}
#endif
#ifdef CONFIG_SECURE_NAND
if (strcmp(cmd, "secure") == 0){
aml_chip->secure_protect = 1; //force nand key can be erased
return 0;
}
#endif
if (strcmp(cmd, "info") == 0) {
#ifdef CONFIG_AML_NAND_KEY
aml_chip->key_protect = 0; //protect nand key can not be erased
#endif
#ifdef CONFIG_SECURE_NAND
aml_chip->secure_protect = 0; //protect nand secure can not be erased
#endif
putc('\n');
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
nand = nand_info[i];
if (!nand) {
nand_init();
if (!nand)
return -1;
}
if (nand->name)
nand_print_info(i);
}
return 0;
}
if (strcmp(cmd, "init") == 0) {
nand_init();
return 0;
}
//cmd for nand test , if nand is ok , then trigger power off
if (strcmp(cmd, "test") == 0) {
int ret=-1;
puts("\ntest the nand flash ***\n");
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
nand = nand_info[i];
if (!nand) {
ret=nand_test_init();
printf("\n***nand_test_init()in NAND DEVICE %d returned:%d***\n ", i,ret);
if (ret)
return -1;
}
}
return 0;
}
if (strcmp(cmd, "scrub_detect") == 0) {
if (nand_curr_device < 0 || nand_curr_device >= (CONFIG_SYS_MAX_NAND_DEVICE+2)) {
puts("\nno devices available\n");
return 1;
}
nand = nand_info[nand_curr_device];
aml_nand_stupid_dectect_badblock(nand);
return 0;
}
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
putc('\n');
if ((nand_curr_device < 0) ||
(nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE))
puts("no devices available\n");
else
nand_print_info(nand_curr_device);
return 0;
}
dev = (int)simple_strtoul(argv[2], NULL, 10);
if (dev < 0 || dev >= (CONFIG_SYS_MAX_NAND_DEVICE+1) || !nand_info[dev]->name) {
puts("No such device\n");
return 1;
}
printf("Device %d: %s", dev, nand_info[dev]->name);
puts("... is now current device\n");
nand_curr_device = dev;
#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
/*
* Select the chip in the board/cpu specific driver
*/
board_nand_select_device(nand_info[dev]->priv, dev);
#endif
return 0;
}
if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
strncmp(cmd, "dump", 4) != 0 &&
strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
strcmp(cmd, "biterr") != 0 && strncmp(cmd, "rom_protect", 11) != 0 &&
strncmp(cmd, "wr_rd_cmp", 9) != 0 && strncmp(cmd, "rom_write", 9) != 0 && (strncmp(cmd, "rom_read", 8) != 0) &&
strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 &&
strcmp(cmd, "factory_info") != 0 && strcmp(cmd, "show_para_page")&& strncmp(cmd, "scrub_safe", 10) != 0) //my_
goto usage;
/* the following commands operate on the current device */
if (nand_curr_device < 0 || nand_curr_device >= (CONFIG_SYS_MAX_NAND_DEVICE+2)) {
puts("\nno devices available\n");
return 1;
}
nand = nand_info[nand_curr_device];
if (!nand)
return -1;
if (strcmp(cmd, "bad") == 0) {
printf("\nDevice %d bad blocks:\n", nand_curr_device);
for (off = 0; off < nand->size; off += nand->erasesize)
if (nand_block_isbad(nand, off))
printf(" %09llx\n", off);
return 0;
}
/*
* Syntax is:
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0 || strcmp(cmd, "scrub_safe") == 0) {
nand_erase_options_t opts;
int argc_cnt = 2;
//printk("%s\n", argv[2]);
/*
if (isstring(argv[2])) {
nand = get_mtd_device_nm(argv[2]);
if (IS_ERR(nand)){
printf("get nand device err\n");
return 1;
}
argc_cnt++;
}
*/
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > argc_cnt && !strcmp("clean", argv[argc_cnt]);
if (clean)
argc_cnt++;
int o = argc_cnt;
int scrub = !strncmp(cmd, "scrub",10);
int scrub_safe = !strncmp(cmd, "scrub_safe",10);
if(scrub_safe)
printf("\nNAND %s: ", scrub_safe ? "scrub_safe" : "erase");
else
printf("\nNAND %s: ", scrub ? "scrub" : "erase");
if (argv[argc_cnt])
{
if(!strcmp(argv[argc_cnt], "whole"))
{
off = 0;
size = nand->size;
printf("whole chip.\n");
}
}
else
{
/* skip first two or three arguments, look for offset and size */
if ((strcmp(cmd, "erase") == 0) && (argc < 3))
{
goto usage;
}
if ((arg_off_size(argc - o, argv + o, nand, &off, &size) != 0))
{
return 1;
}
}
memset(&opts, 0, sizeof(opts));
opts.offset = off;
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
if (scrub) {
puts("Warning: "
"scrub option will erase all factory set "
"bad blocks!\n"
" "
"There is no reliable way to recover them.\n"
" "
"Use this command only for testing purposes "
"if you\n"
" "
"are sure of what you are doing!\n"
"\nReally scrub this NAND flash? <y/N>\n");
if(nand_protect)
{
if (getc() == 'y') {
puts("y");
if (getc() == '\r')
opts.scrub = 1;
else {
puts("scrub aborted\n");
return -1;
}
} else {
puts("scrub aborted\n");
return -1;
}
}
else
{
opts.scrub = 1;
}
}
else if(scrub_safe){
puts("Warning: "
"scrub_safe option will erase all "
"bad blocks except factory bad blocks!\n");
opts.scrub = 2; // indicate scrub_safe
}
ret = nand_erase_opts(nand, &opts);
printf("%s\n", ret ? "ERROR" : "OK");
#ifdef CONFIG_AML_NAND_KEY
aml_chip->key_protect = 0; //protect nand key can not be erased
#endif
#ifdef CONFIG_SECURE_NAND
aml_chip->secure_protect = 0; //protect nand secure can not be erased
#endif
return ret == 0 ? 0 : 1;
}
if (strncmp(cmd, "dump", 4) == 0) {
if (argc < 3)
goto usage;
s = strchr(cmd, '.');
//off = (loff_t)simple_strtoul(argv[2], NULL, 16);
if (!(str2longlong(argv[2], (unsigned long long*)(&off))))
return -1;
if (s != NULL && strcmp(s, ".oob") == 0)
ret = nand_dump(nand, off, 1);
else
ret = nand_dump(nand, off, 0);
return ret == 0 ? 1 : 0;
}
if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
int read;
if (argc < 4)
goto usage;
if (isstring(argv[2])) {
nand = get_mtd_device_nm(argv[2]);
if (IS_ERR(nand))
goto usage;
addr = (ulong)simple_strtoul(argv[3], NULL, 16);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: %s ", read ? "read" : "write", argv[2]);
if (argc == 4) {
extern unsigned int get_mtd_size(char *name);
off = 0;
size = get_mtd_size(argv[2]);
} else {
if (arg_off_size(argc - 4, argv + 4, nand, &off, &size) != 0)
return 1;
}
}
else {
addr = (ulong)simple_strtoul(argv[2], NULL, 16);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
return 1;
}
#ifdef CONFIG_AMLROM_NANDBOOT
if((read==0) && ((off)<(1024* nand->writesize)) && (nand_curr_device == 0)){
printf("offset 0x%llx in aml-boot area ,abort\n", off);
return -1;
}
#endif
s = strchr(cmd, '.');
if (!s || !strcmp(s, ".jffs2") ||
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(nand, off, &size,
(u_char *)addr, 0);
else
ret = nand_write_skip_bad(nand, off, &size,
(u_char *)addr, 0);
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (u8 *)addr,
.ooblen = size,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
} else if (!strcmp(s, ".raw")) {
(u_char *)addr, 0);
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (u8 *)addr,
.ooblen = size,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
} else if (!strcmp(s, ".raw")) {
if (read)
ret = nand_read_skip_bad(nand, off, &size,
(u_char *)addr, 2);
else
ret = nand_write_skip_bad(nand, off, &size,
(u_char *)addr, 2);
} else if (!strcmp(s, ".yaff1")) {
if (read)
ret = nand_read_skip_bad(nand, off, &size,
(u_char *)addr, 1);
else
ret = nand_write_skip_bad(nand, off, &size,
(u_char *)addr, 1);
} else {
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
}
static int raw_access(nand_info_t *nand, ulong addr, loff_t off, ulong count,
int read)
{
int ret = 0;
while (count--) {
/* Raw access */
mtd_oob_ops_t ops = {
.datbuf = (u8 *)addr,
.oobbuf = ((u8 *)addr) + nand->writesize,
.len = nand->writesize,
.ooblen = nand->oobsize,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
if (ret) {
printf("%s: error at offset %llx, ret %d\n",
__func__, (long long)off, ret);
break;
}
addr += nand->writesize + nand->oobsize;
off += nand->writesize;
}
return ret;
}
int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int i, ret = 0;
ulong addr;
loff_t off, size, maxsize;
char *cmd, *s;
nand_info_t *nand;
#ifdef CONFIG_SYS_NAND_QUIET
int quiet = CONFIG_SYS_NAND_QUIET;
#else
int quiet = 0;
#endif
const char *quiet_str = getenv("quiet");
int dev = nand_curr_device;
int repeat = flag & CMD_FLAG_REPEAT;
/* at least two arguments please */
if (argc < 2)
goto usage;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
cmd = argv[1];
/* Only "dump" is repeatable. */
if (repeat && strcmp(cmd, "dump"))
return 0;
if (strcmp(cmd, "info") == 0) {
putc('\n');
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (nand_info[i].name)
nand_print_and_set_info(i);
}
return 0;
}
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
putc('\n');
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
puts("no devices available\n");
else
nand_print_and_set_info(dev);
return 0;
}
dev = (int)simple_strtoul(argv[2], NULL, 10);
set_dev(dev);
return 0;
}
#ifdef CONFIG_ENV_OFFSET_OOB
/* this command operates only on the first nand device */
if (strcmp(cmd, "env.oob") == 0)
return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
#endif
/* The following commands operate on the current device, unless
* overridden by a partition specifier. Note that if somehow the
* current device is invalid, it will have to be changed to a valid
* one before these commands can run, even if a partition specifier
* for another device is to be used.
*/
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[dev].name) {
puts("\nno devices available\n");
return 1;
}
nand = &nand_info[dev];
if (strcmp(cmd, "bad") == 0) {
printf("\nDevice %d bad blocks:\n", dev);
for (off = 0; off < nand->size; off += nand->erasesize)
if (nand_block_isbad(nand, off))
printf(" %08llx\n", (unsigned long long)off);
return 0;
}
/*
* Syntax is:
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
nand_erase_options_t opts;
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > 2 && !strcmp("clean", argv[2]);
int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
int o = (clean || scrub_yes) ? 3 : 2;
int scrub = !strncmp(cmd, "scrub", 5);
int spread = 0;
int args = 2;
const char *scrub_warn =
"Warning: "
"scrub option will erase all factory set bad blocks!\n"
" "
"There is no reliable way to recover them.\n"
" "
"Use this command only for testing purposes if you\n"
" "
"are sure of what you are doing!\n"
"\nReally scrub this NAND flash? <y/N>\n";
if (cmd[5] != 0) {
if (!strcmp(&cmd[5], ".spread")) {
spread = 1;
} else if (!strcmp(&cmd[5], ".part")) {
args = 1;
} else if (!strcmp(&cmd[5], ".chip")) {
args = 0;
} else {
goto usage;
}
}
/*
* Don't allow missing arguments to cause full chip/partition
* erases -- easy to do accidentally, e.g. with a misspelled
* variable name.
*/
if (argc != o + args)
goto usage;
printf("\nNAND %s: ", cmd);
/* skip first two or three arguments, look for offset and size */
if (arg_off_size(argc - o, argv + o, &dev, &off, &size,
&maxsize) != 0)
return 1;
nand = &nand_info[dev];
memset(&opts, 0, sizeof(opts));
opts.offset = off;
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
opts.spread = spread;
if (scrub) {
if (!scrub_yes)
puts(scrub_warn);
if (scrub_yes)
opts.scrub = 1;
else if (getc() == 'y') {
puts("y");
if (getc() == '\r')
opts.scrub = 1;
else {
puts("scrub aborted\n");
return -1;
}
} else {
puts("scrub aborted\n");
return -1;
}
}
ret = nand_erase_opts(nand, &opts);
printf("%s\n", ret ? "ERROR" : "OK");
return ret == 0 ? 0 : 1;
}
if (strncmp(cmd, "dump", 4) == 0) {
if (argc < 3)
goto usage;
off = (int)simple_strtoul(argv[2], NULL, 16);
ret = nand_dump(nand, off, !strcmp(&cmd[4], ".oob"), repeat);
return ret == 0 ? 1 : 0;
}
if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
size_t rwsize;
ulong pagecount = 1;
int read;
int raw;
if (argc < 4)
goto usage;
addr = (ulong)simple_strtoul(argv[2], NULL, 16);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
nand = &nand_info[dev];
s = strchr(cmd, '.');
if (s && !strcmp(s, ".raw")) {
raw = 1;
if (arg_off(argv[3], &dev, &off, &size, &maxsize))
return 1;
if (argc > 4 && !str2long(argv[4], &pagecount)) {
printf("'%s' is not a number\n", argv[4]);
return 1;
}
if (pagecount * nand->writesize > size) {
puts("Size exceeds partition or device limit\n");
return -1;
}
rwsize = pagecount * (nand->writesize + nand->oobsize);
} else {
if (arg_off_size(argc - 3, argv + 3, &dev,
&off, &size, &maxsize) != 0)
return 1;
rwsize = size;
}
if (!s || !strcmp(s, ".jffs2") ||
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(nand, off, &rwsize,
NULL, maxsize,
(u_char *)addr);
else
ret = nand_write_skip_bad(nand, off, &rwsize,
NULL, maxsize,
(u_char *)addr, 0);
#ifdef CONFIG_CMD_NAND_TRIMFFS
} else if (!strcmp(s, ".trimffs")) {
if (read) {
printf("Unknown nand command suffix '%s'\n", s);
return 1;
}
ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
maxsize, (u_char *)addr,
WITH_DROP_FFS);
#endif
#ifdef CONFIG_CMD_NAND_YAFFS
} else if (!strcmp(s, ".yaffs")) {
if (read) {
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
}
ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
maxsize, (u_char *)addr,
WITH_YAFFS_OOB);
#endif
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (u8 *)addr,
.ooblen = rwsize,
.mode = MTD_OOB_RAW
};
if (read)
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
} else if (raw) {
// test the kernel
static int kernel_crc_test (void)
{
// copy kernel from nand to ram to work on
int r;
size_t cnt;
nand_info_t *nand;
ulong offset, addr;
// !!!!!!!!! for debug until working
// return(0);
//!!!!!!!!!! remove when nand_read working correctly
image_header_t *hdr;
hdr = (image_header_t *)KERNELCRCTESTSPACE; // get the header address
printf("Verify kernel checksums\n");
offset = (ulong) KERNELNANDADDR; // where the kernel resides in NAND
addr = (ulong) KERNELCRCTESTSPACE; // where the kernel is loaded into RAM
nand = &nand_info[KERNELCRCTESTDEVICE]; // get the nand device block
printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);
cnt = nand->writesize;
printf("1.nand %x, offset %x, cnt %x, addr %x\n",(unsigned int)nand,(unsigned int) offset, (unsigned int) cnt, (unsigned int)addr);
r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
if (r) {
puts("** Read error\n");
return (1);
}
switch (genimg_get_format ((void *)addr)) {
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *)addr;
image_print_contents (hdr);
cnt = image_get_image_size (hdr) + nand->writesize;
break;
default:
puts ("** Unknown image type\n");
return 1;
}
/* FIXME: skip bad blocks */
// printf("2.nand %x, offset %x, cnt %x, addr %x\n",nand, offset, cnt, addr);
// cnt = 1937496;
// cnt = 1937920;
// debug printf("2.nand %x, offset %x, cnt %x, addr %x\n",(unsigned int)nand, (unsigned int)offset, (unsigned int)cnt, (unsigned int)addr);
r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
if (r) {
printf("** Read error r = %d\n",r);
return 1;
}
/* Loading ok, update default load address */
load_addr = addr;
hdr = (image_header_t *)addr;
image_print_contents (hdr);
if (!image_check_hcrc (hdr)) {
printf("Kernel header checksum failed\n");
printf("kernel data checksum failed\n");
return 1;
}
else {
printf("Kernel header checksum passed\n");
if (!image_check_dcrc (hdr)) {
printf ("Kernel data checksum failed\n");
return 1;
}
else {
printf ("Kernel data checksum passed\n");
return 0;
}
}
}
static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
ulong offset, ulong addr, char *cmd)
{
int r;
char *ep, *s;
size_t cnt;
image_header_t *hdr;
#if defined(CONFIG_FIT)
const void *fit_hdr = NULL;
#endif
s = strchr(cmd, '.');
if (s != NULL &&
(strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
printf("Unknown nand load suffix '%s'\n", s);
show_boot_progress(-53);
return 1;
}
printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);
cnt = nand->writesize;
r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
if (r) {
puts("** Read error\n");
show_boot_progress (-56);
return 1;
}
show_boot_progress (56);
switch (genimg_get_format ((void *)addr)) {
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *)addr;
show_boot_progress (57);
image_print_contents (hdr);
cnt = image_get_image_size (hdr);
break;
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
fit_hdr = (const void *)addr;
puts ("Fit image detected...\n");
cnt = fit_get_size (fit_hdr);
break;
#endif
default:
show_boot_progress (-57);
puts ("** Unknown image type\n");
return 1;
}
show_boot_progress (57);
r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
if (r) {
puts("** Read error\n");
show_boot_progress (-58);
return 1;
}
show_boot_progress (58);
#if defined(CONFIG_FIT)
/* This cannot be done earlier, we need complete FIT image in RAM first */
if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
if (!fit_check_format (fit_hdr)) {
show_boot_progress (-150);
puts ("** Bad FIT image format\n");
return 1;
}
show_boot_progress (151);
fit_print_contents (fit_hdr);
}
#endif
/* Loading ok, update default load address */
load_addr = addr;
/* Check if we should attempt an auto-start */
if (((ep = getenv("autostart")) != NULL) && (strcmp(ep, "yes") == 0)) {
char *local_args[2];
extern int do_bootm(cmd_tbl_t *, int, int, char *[]);
local_args[0] = cmd;
local_args[1] = NULL;
printf("Automatic boot of image at addr 0x%08lx ...\n", addr);
do_bootm(cmdtp, 0, 1, local_args);
return 1;
}
return 0;
}
int nand_logic_read
(
nand_logic_t *nand_logic,
unsigned long long offset, /* should be alignment with nand page size */
unsigned int length, /* should be alignment with nand page size */
unsigned char *buf,
int withoob
)
{
unsigned long long phylength;
unsigned long long phyaddress;
nand_info_t *nand = nand_logic->nand;
/* Reject read, which are not page aligned */
if ((offset & (nand->writesize - 1)) || (length & (nand->writesize - 1)))
{
printf("Attempt to read non page aligned data, "
"nand page size: 0x%08x, offset: 0x%08llx, length: 0x%08x\n",
nand->writesize, offset, length);
return -1;
}
phylength = logic_to_phylength(nand, nand_logic->address,
(offset + length + nand->erasesize - 1) & (~(nand_logic->erasesize - 1)));
if ((offset > nand_logic->length)
|| (length > nand_logic->length)
|| (phylength > nand_logic->length))
{
printf("Attempt to read outside the flash handle area, "
"flash handle size: 0x%08llx, offset: 0x%08llx, "
"length: 0x%08x, phylength: 0x%08llx\n",
nand_logic->length, offset, length, phylength);
return -1;
}
phylength = logic_to_phylength(nand, nand_logic->address,
(offset + nand->erasesize - 1) & (~(nand_logic->erasesize - 1)));
if(offset & (nand_logic->erasesize - 1))
phyaddress = phylength - nand->erasesize +
(offset & (nand_logic->erasesize - 1)) + nand_logic->address;
else
phyaddress = phylength + nand_logic->address;
if (withoob)
{
unsigned long long block_offset;
unsigned long long read_length;
while (length > 0)
{
block_offset = phyaddress & (nand->erasesize - 1);
WATCHDOG_RESET ();
if (nand_block_isbad (nand, phyaddress & ~(nand_logic->erasesize - 1)))
{
printf("Skipping bad block 0x%08llx\n",
phyaddress & ~(nand_logic->erasesize - 1));
phyaddress += nand->erasesize - block_offset;
continue;
}
if (length < (nand->erasesize - block_offset))
read_length = length;
else
read_length = nand->erasesize - block_offset;
while (read_length > 0)
{
int ret;
struct mtd_oob_ops ops;
memset(&ops, 0, sizeof(ops));
ops.datbuf = buf;
ops.oobbuf = buf + nand->writesize;
ops.len = nand->writesize;
ops.ooblen = nand->oobsize;
ops.mode = MTD_OOB_RAW;
if ((ret = nand->read_oob(nand, phyaddress, &ops)) < 0)
{
printf("Error (%d) reading page 0x%08llx\n", ret, phyaddress);
return -1;
}
phyaddress += nand->writesize;
read_length -= nand->writesize;
length -= nand->writesize;
buf += nand->writesize + nand->oobsize;
}
}
return 0;
}
else
{
return nand_read_skip_bad(nand, phyaddress, &length, buf);
}
}