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Add an optional byte-oriented write method to the MTD interface

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This commit is contained in:
Gregory Nutt
2013-05-01 10:59:57 -06:00
parent ba52f8d3ec
commit 99c2cfc168
16 changed files with 122 additions and 33 deletions
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include/nuttx/mtd.h
+16 -6
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@@ -52,11 +52,12 @@
/* Macros to hide implementation */
#define MTD_ERASE(d,s,n) ((d)->erase ? (d)->erase(d,s,n) : (-ENOSYS))
#define MTD_BREAD(d,s,n,b) ((d)->bread ? (d)->bread(d,s,n,b) : (-ENOSYS))
#define MTD_READ(d,s,n,b) ((d)->read ? (d)->read(d,s,n,b) : (-ENOSYS))
#define MTD_BWRITE(d,s,n,b)((d)->bwrite ? (d)->bwrite(d,s,n,b) : (-ENOSYS))
#define MTD_IOCTL(d,c,a) ((d)->ioctl ? (d)->ioctl(d,c,a) : (-ENOSYS))
#define MTD_ERASE(d,s,n) ((d)->erase ? (d)->erase(d,s,n) : (-ENOSYS))
#define MTD_BREAD(d,s,n,b) ((d)->bread ? (d)->bread(d,s,n,b) : (-ENOSYS))
#define MTD_BWRITE(d,s,n,b)((d)->bwrite ? (d)->bwrite(d,s,n,b) : (-ENOSYS))
#define MTD_READ(d,s,n,b) ((d)->read ? (d)->read(d,s,n,b) : (-ENOSYS))
#define MTD_WRITE(d,s,n,b) ((d)->write ? (d)->write(d,s,n,b) : (-ENOSYS))
#define MTD_IOCTL(d,c,a) ((d)->ioctl ? (d)->ioctl(d,c,a) : (-ENOSYS))
/* If any of the low-level device drivers declare they want sub-sector erase
* support, then define MTD_SUBSECTOR_ERASE.
@@ -108,7 +109,12 @@ struct mtd_dev_s
{
/* The following methods operate on the MTD: */
/* Erase the specified erase blocks (units are erase blocks) */
/* Erase the specified erase blocks (units are erase blocks). Semantic
* Clarification: Here, we are not referring to the erase block according
* to the FLASH data sheet. Rather, we are referring to the *smallest*
* eraseable part of the FLASH which may have a name like a page or sector
* or subsector.
*/
int (*erase)(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks);
@@ -127,6 +133,10 @@ struct mtd_dev_s
ssize_t (*read)(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR uint8_t *buffer);
#ifdef CONFIG_MTD_BYTE_WRITE
ssize_t (*write)(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR const uint8_t *buffer);
#endif
/* Support other, less frequently used commands:
* - MTDIOC_GEOMETRY: Get MTD geometry