mtd/nand/ecc.c

28  *   - prepare: Prepare an I/O request. Enable/disable the ECC engine based on
38  * The I/O request should be enclosed in a prepare()/finish() pair of calls
49  * prepare/finish hook.
52  *   - external + prepare + raw + read: do nothing
54  *   - external + prepare + raw + write: do nothing
56  *   - external + prepare + ecc + read: do nothing
60  *   - external + prepare + ecc + write: calculate ECC bytes and store them at
66  *   - pipelined + prepare + raw + read: disable the controller's ECC engine if
69  *   - pipelined + prepare + raw + write: disable the controller's ECC engine if
72  *   - pipelined + prepare + ecc + read: enable the controller's ECC engine if
76  *   - pipelined + prepare + ecc + write: enable the controller's ECC engine if
81  *   - ondie + prepare + raw + read: send commands to disable the on-chip ECC
84  *   - ondie + prepare + raw + write: send commands to disable the on-chip ECC
87  *   - ondie + prepare + ecc + read: send commands to enable the on-chip ECC
91  *   - ondie + prepare + ecc + write: send commands to enable the on-chip ECC
133  * nand_ecc_prepare_io_req - Prepare an I/O request