linux/include/mtd, branch v3.5.2

UBI: amend commentaries WRT dtype

2012-05-20T17:25:59Z

Richard removed the "dtype" hint, but few commentaries were left and this patch removes them. I've also added a better description about the "dtype" field in the ubi-user.h for people who may ever wonder what was that dtype thing about. This patch also adds an important note that it is better to use value "3" for the "dtype" field. Signed-off-by: Artem Bityutskiy

UBI: remove data type hint from ubi-user.h

2012-05-20T17:25:59Z

This finally removes the data type hint from the UBI ABI. >From now on the "dtype" field will be ignored and must not used anymore. Signed-off-by: Richard Weinberger Signed-off-by: Artem Bityutskiy

mtd: document that MEMWRITE ioctl is NAND-specific

2012-01-09T18:18:36Z

Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: kill old field for `struct mtd_info_user'

2011-09-11T12:57:44Z

The ecctype and eccsize fields have been obsolete for a while. Since they don't have any users, we can kill them and leave padding in their place for now. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: document ABI

2011-09-11T12:57:44Z

We're missing a lot of important documentation in include/mtd/mtd-abi.h: * add a simple description of each ioctl (feel free to expand!) * give full explanations of recently added and modified operations * explain the usage of "RAW" that appear in different modes and types of operations * fix some comment style along the way Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: add MEMWRITE ioctl

2011-09-11T12:56:25Z

Implement a new ioctl for writing both page data and OOB to flash at the same time. This ioctl is intended to be a generic interface that can replace other ioctls (MEMWRITEOOB and MEMWRITEOOB64) and cover the functionality of several other old ones, e.g., MEMWRITE can: * write autoplaced OOB instead of using ECCGETLAYOUT (deprecated) and working around the reserved areas * write raw (no ECC) OOB instead of using MTDFILEMODE to set the per-file-descriptor MTD_FILE_MODE_RAW * write raw (no ECC) data instead of using MTDFILEMODE (MTD_FILE_MODE_RAW) and using standard character device "write" This ioctl is especially useful for MLC NAND, which cannot be written twice (i.e., we cannot successfully write the page data and OOB in two separate operations). Instead, MEMWRITE can write both in a single operation. Note that this ioctl is not affected by the MTD file mode (i.e., MTD_FILE_MODE_RAW vs. MTD_FILE_MODE_NORMAL), since it receives its write mode as an input parameter. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: rename MTD_MODE_* to MTD_FILE_MODE_*

2011-09-11T12:29:36Z

These modes hold their state only for the life of their file descriptor, and they overlap functionality with the MTD_OPS_* modes. Particularly, MTD_MODE_RAW and MTD_OPS_RAW cover the same function: to provide raw (i.e., without ECC) access to the flash. In fact, although it may not be clear, MTD_MODE_RAW implied that operations should enable the MTD_OPS_RAW mode. Thus, we should be specific on what each mode means. This is a start, where MTD_FILE_MODE_* actually represents a "file mode," not necessarily a true global MTD mode. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: rename MTD_OOB_* to MTD_OPS_*

2011-09-11T12:28:59Z

These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW affected operations on in-band page data as well. To clarify these options and to emphasize that their effect is applied per-operation, we change the primary prefix to MTD_OPS_. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: move mtd_oob_mode_t to shared kernel/user space

2011-09-11T12:26:20Z

We will want to use the MTD_OOB_{PLACE,AUTO,RAW} modes in user-space applications through the introduction of new ioctls, so we should make this enum a shared type. This enum is now anonymous. Artem: tweaked the patch. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy

mtd: remove MEMSETOOBSEL macro definition

2011-09-11T12:02:18Z

MEMSETOOBSEL is completely unused and useless. Remove the definition. Note: it's probably best not to use this ioctl number in the future for MTD, since that may cause conflicts between old kernels and new user software (or new kernels and old user software). Artem: leave a comment about MEMSETOOBSEL. Signed-off-by: Brian Norris Signed-off-by: Artem Bityutskiy