@@ -108,6 +108,36 @@ static int nand_do_write_oob(struct
*/
DEFINE_LED_TRIGGER(nand_led_trigger);
+static int block_alignment_verification(struct mtd_info *mtd, loff_t
ofs, uint64_t len)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: start = 0x%012llx, len = %llu\n",
+ __func__, (unsigned long long)ofs, len);
+
+ /* Start address must align on block boundary */
+ if (ofs & ((1 << chip->phys_erase_shift) - 1)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Unaligned address\n", __func__);
+ ret = -EINVAL;
+ }
+
+ /* Length must align on block boundary */
+ if (len & ((1 << chip->phys_erase_shift) - 1)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Length not block aligned\n",
+ __func__);
+ ret = -EINVAL;
+ }
+
+ /* Do not allow past end of device */
+ if (ofs + len > mtd->size) {
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Past end of device\n",
+ __func__);
+ ret = -EINVAL;
+ }
+
+ return 0;
+}
+
/**
* nand_release_device - [GENERIC] release chip