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mtd: Add mtd_* functions 

The Kernel has mtd_read, mtd_write, mtd_erase and mtd_block_markbad.
Add these functions to barebox aswell to make future mtd synchronizations
with the kernel easier.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-02-14 10:31:37 +01:00
parent b600cb936e
commit 7b7cf936cb
2 changed files with 47 additions and 9 deletions
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49
drivers/mtd/core.c
View File

@ -30,15 +30,6 @@
static LIST_HEAD(mtd_register_hooks);
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);
}
static ssize_t mtd_op_read(struct cdev *cdev, void* buf, size_t count,
loff_t _offset, ulong flags)
{
@ -170,6 +161,46 @@ int mtd_ioctl(struct cdev *cdev, int request, void *buf)
return ret;
}
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)
{
int ret;
if (mtd->block_markbad)
ret = mtd->block_markbad(mtd, ofs);
else
ret = -ENOSYS;
return ret;
}
int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
u_char *buf)
{
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)
{
return mtd->write(mtd, to, len, retlen, buf);
}
int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
return mtd->erase(mtd, instr);
}
static struct file_operations mtd_ops = {
.read = mtd_op_read,
#ifdef CONFIG_MTD_WRITE

7
include/linux/mtd/mtd.h
View File

@ -207,6 +207,12 @@ struct mtd_info {
char *size_str;
};
int mtd_erase(struct mtd_info *mtd, struct erase_info *instr);
int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
u_char *buf);
int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
const u_char *buf);
static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
{
do_div(sz, mtd->erasesize);
@ -252,6 +258,7 @@ static inline void mtd_erase_callback(struct erase_info *instr)
#endif
int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs);
int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs);
/*
* Debugging macro and defines