+static int doc_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen,
+ u_char *eccbuf, struct nand_oobinfo *oobsel)
+{
+ static char static_buf[512];
+ static DECLARE_MUTEX(writev_buf_sem);
+
+ size_t totretlen = 0;
+ size_t thisvecofs = 0;
+ int ret= 0;
+
+ down(&writev_buf_sem);
+
+ while(count) {
+ size_t thislen, thisretlen;
+ unsigned char *buf;
+
+ buf = vecs->iov_base + thisvecofs;
+ thislen = vecs->iov_len - thisvecofs;
+
+
+ if (thislen >= 512) {
+ thislen = thislen & ~(512-1);
+ thisvecofs += thislen;
+ } else {
+ /* Not enough to fill a page. Copy into buf */
+ memcpy(static_buf, buf, thislen);
+ buf = &static_buf[thislen];
+
+ while(count && thislen < 512) {
+ vecs++;
+ count--;
+ thisvecofs = min((512-thislen), vecs->iov_len);
+ memcpy(buf, vecs->iov_base, thisvecofs);
+ thislen += thisvecofs;
+ buf += thisvecofs;
+ }
+ buf = static_buf;
+ }
+ if (count && thisvecofs == vecs->iov_len) {
+ thisvecofs = 0;
+ vecs++;
+ count--;
+ }
+ ret = doc_write_ecc(mtd, to, thislen, &thisretlen, buf, eccbuf, oobsel);
+
+ totretlen += thisretlen;
+
+ if (ret || thisretlen != thislen)
+ break;
+
+ to += thislen;
+ }
+
+ up(&writev_buf_sem);
+ *retlen = totretlen;
+ return ret;
+}
+
+
+static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
+ size_t * retlen, u_char * buf)