diff options
Diffstat (limited to 'include/linux/mtd/mtd-abi.h')
| -rw-r--r-- | include/linux/mtd/mtd-abi.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd-abi.h b/include/linux/mtd/mtd-abi.h new file mode 100644 index 0000000000..3d1d416810 --- /dev/null +++ b/include/linux/mtd/mtd-abi.h @@ -0,0 +1,99 @@ +/* + * $Id: mtd-abi.h,v 1.7 2004/11/23 15:37:32 gleixner Exp $ + * + * Portions of MTD ABI definition which are shared by kernel and user space + */ + +#ifndef __MTD_ABI_H__ +#define __MTD_ABI_H__ + +struct erase_info_user { + uint32_t start; + uint32_t length; +}; + +struct mtd_oob_buf { + uint32_t start; + uint32_t length; + unsigned char *ptr; +}; + +#define MTD_ABSENT 0 +#define MTD_RAM 1 +#define MTD_ROM 2 +#define MTD_NORFLASH 3 +#define MTD_NANDFLASH 4 +#define MTD_PEROM 5 +#define MTD_OTHER 14 +#define MTD_UNKNOWN 15 + +#define MTD_CLEAR_BITS 1 /* Bits can be cleared (flash) */ +#define MTD_SET_BITS 2 /* Bits can be set */ +#define MTD_ERASEABLE 4 /* Has an erase function */ +#define MTD_WRITEB_WRITEABLE 8 /* Direct IO is possible */ +#define MTD_VOLATILE 16 /* Set for RAMs */ +#define MTD_XIP 32 /* eXecute-In-Place possible */ +#define MTD_OOB 64 /* Out-of-band data (NAND flash) */ +#define MTD_ECC 128 /* Device capable of automatic ECC */ +#define MTD_NO_VIRTBLOCKS 256 /* Virtual blocks not allowed */ + +/* Some common devices / combinations of capabilities */ +#define MTD_CAP_ROM 0 +#define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE) +#define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE) +#define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB) +#define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS) + + +/* Types of automatic ECC/Checksum available */ +#define MTD_ECC_NONE 0 /* No automatic ECC available */ +#define MTD_ECC_RS_DiskOnChip 1 /* Automatic ECC on DiskOnChip */ +#define MTD_ECC_SW 2 /* SW ECC for Toshiba & Samsung devices */ + +/* ECC byte placement */ +#define MTD_NANDECC_OFF 0 /* Switch off ECC (Not recommended) */ +#define MTD_NANDECC_PLACE 1 /* Use the given placement in the structure (YAFFS1 legacy mode) */ +#define MTD_NANDECC_AUTOPLACE 2 /* Use the default placement scheme */ +#define MTD_NANDECC_PLACEONLY 3 /* Use the given placement in the structure (Do not store ecc result on read) */ +#define MTD_NANDECC_AUTOPL_USR 4 /* Use the given autoplacement scheme rather than using the default */ + +struct mtd_info_user { + uint8_t type; + uint32_t flags; + uint32_t size; /* Total size of the MTD */ + uint32_t erasesize; + uint32_t oobblock; /* Size of OOB blocks (e.g. 512) */ + uint32_t oobsize; /* Amount of OOB data per block (e.g. 16) */ + uint32_t ecctype; + uint32_t eccsize; +}; + +struct region_info_user { + uint32_t offset; /* At which this region starts, + * from the beginning of the MTD */ + uint32_t erasesize; /* For this region */ + uint32_t numblocks; /* Number of blocks in this region */ + uint32_t regionindex; +}; + +#define MEMGETINFO _IOR('M', 1, struct mtd_info_user) +#define MEMERASE _IOW('M', 2, struct erase_info_user) +#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf) +#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf) +#define MEMLOCK _IOW('M', 5, struct erase_info_user) +#define MEMUNLOCK _IOW('M', 6, struct erase_info_user) +#define MEMGETREGIONCOUNT _IOR('M', 7, int) +#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user) +#define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo) +#define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo) +#define MEMGETBADBLOCK _IOW('M', 11, loff_t) +#define MEMSETBADBLOCK _IOW('M', 12, loff_t) + +struct nand_oobinfo { + uint32_t useecc; + uint32_t eccbytes; + uint32_t oobfree[8][2]; + uint32_t eccpos[32]; +}; + +#endif /* __MTD_ABI_H__ */ |