*/
#include <linux/mtd/mtd.h>
-#include <linux/mtd/compat.h>
+#include <linux/compat.h>
#include <ubi_uboot.h>
struct mtd_info *mtd_table[MAX_MTD_DEVICES];
mtd->index = i;
mtd->usecount = 0;
+ /* default value if not set by driver */
+ if (mtd->bitflip_threshold == 0)
+ mtd->bitflip_threshold = mtd->ecc_strength;
+
+
/* No need to get a refcount on the module containing
the notifier, since we hold the mtd_table_mutex */
*truncated = 0;
*len_incl_bad = 0;
- if (offset >= mtd->size) {
- *truncated = 1;
- return;
- }
-
if (!mtd->block_isbad) {
*len_incl_bad = length;
return;
uint64_t block_len;
while (len_excl_bad < length) {
+ if (offset >= mtd->size) {
+ *truncated = 1;
+ return;
+ }
+
block_len = mtd->erasesize - (offset & (mtd->erasesize - 1));
if (!mtd->block_isbad(mtd, offset & ~(mtd->erasesize - 1)))
*len_incl_bad += block_len;
offset += block_len;
-
- if (offset >= mtd->size) {
- *truncated = 1;
- break;
- }
}
}
#endif /* defined(CONFIG_CMD_MTDPARTS_SPREAD) */
+
+ /*
+ * Erase is an asynchronous operation. Device drivers are supposed
+ * to call instr->callback() whenever the operation completes, even
+ * if it completes with a failure.
+ * Callers are supposed to pass a callback function and wait for it
+ * to be called before writing to the block.
+ */
+int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ if (instr->addr > mtd->size || instr->len > mtd->size - instr->addr)
+ return -EINVAL;
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ if (!instr->len) {
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+ return 0;
+ }
+ return mtd->_erase(mtd, instr);
+}
+
+int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
+ u_char *buf)
+{
+ if (from < 0 || from > mtd->size || len > mtd->size - from)
+ return -EINVAL;
+ if (!len)
+ return 0;
+ return mtd->_read(mtd, from, len, retlen, buf);
+}
+
+int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
+ const u_char *buf)
+{
+ *retlen = 0;
+ if (to < 0 || to > mtd->size || len > mtd->size - to)
+ return -EINVAL;
+ if (!mtd->_write || !(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ if (!len)
+ return 0;
+ return mtd->_write(mtd, to, len, retlen, buf);
+}
+
+/*
+ * In blackbox flight recorder like scenarios we want to make successful writes
+ * in interrupt context. panic_write() is only intended to be called when its
+ * known the kernel is about to panic and we need the write to succeed. Since
+ * the kernel is not going to be running for much longer, this function can
+ * break locks and delay to ensure the write succeeds (but not sleep).
+ */
+int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
+ const u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->_panic_write)
+ return -EOPNOTSUPP;
+ if (to < 0 || to > mtd->size || len > mtd->size - to)
+ return -EINVAL;
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ if (!len)
+ return 0;
+ return mtd->_panic_write(mtd, to, len, retlen, buf);
+}
+
+int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
+{
+ ops->retlen = ops->oobretlen = 0;
+ if (!mtd->_read_oob)
+ return -EOPNOTSUPP;
+ return mtd->_read_oob(mtd, from, ops);
+}
+
+/*
+ * Method to access the protection register area, present in some flash
+ * devices. The user data is one time programmable but the factory data is read
+ * only.
+ */
+int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
+ size_t len)
+{
+ if (!mtd->_get_fact_prot_info)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_get_fact_prot_info(mtd, buf, len);
+}
+
+int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->_read_fact_prot_reg)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_read_fact_prot_reg(mtd, from, len, retlen, buf);
+}
+
+int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf,
+ size_t len)
+{
+ if (!mtd->_get_user_prot_info)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_get_user_prot_info(mtd, buf, len);
+}
+
+int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->_read_user_prot_reg)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_read_user_prot_reg(mtd, from, len, retlen, buf);
+}
+
+int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->_write_user_prot_reg)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_write_user_prot_reg(mtd, to, len, retlen, buf);
+}
+
+int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len)
+{
+ if (!mtd->_lock_user_prot_reg)
+ return -EOPNOTSUPP;
+ if (!len)
+ return 0;
+ return mtd->_lock_user_prot_reg(mtd, from, len);
+}
+
+/* Chip-supported device locking */
+int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ if (!mtd->_lock)
+ return -EOPNOTSUPP;
+ if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs)
+ return -EINVAL;
+ if (!len)
+ return 0;
+ return mtd->_lock(mtd, ofs, len);
+}
+
+int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ if (!mtd->_unlock)
+ return -EOPNOTSUPP;
+ if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs)
+ return -EINVAL;
+ if (!len)
+ return 0;
+ return mtd->_unlock(mtd, ofs, len);
+}
+
+int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+ if (!mtd->_block_isbad)
+ return 0;
+ if (ofs < 0 || ofs > mtd->size)
+ return -EINVAL;
+ return mtd->_block_isbad(mtd, ofs);
+}
+
+int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ if (!mtd->_block_markbad)
+ return -EOPNOTSUPP;
+ if (ofs < 0 || ofs > mtd->size)
+ return -EINVAL;
+ if (!(mtd->flags & MTD_WRITEABLE))
+ return -EROFS;
+ return mtd->_block_markbad(mtd, ofs);
+}
+
projects / u-boot / blobdiff