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dfu: tftp: update: Add dfu_write_from_mem_addr() function

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This function allows writing via DFU data stored from fixed buffer address
(like e.g. loadaddr env variable).

Such predefined buffers are used in the update_tftp() code. In fact this
function is a wrapper on the dfu_write() and dfu_flush().

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Lukasz Majewski 2015-08-24 00:21:46 +02:00 committed by Marek Vasut
parent 2d50d68a4c
commit 2092e46104
2 changed files with 52 additions and 0 deletions
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37
drivers/dfu/dfu.c
View file

@ -568,3 +568,40 @@ int dfu_get_alt(char *name)
return -ENODEV;
}
int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size)
{
unsigned long dfu_buf_size, write, left = size;
int i, ret = 0;
void *dp = buf;
/*
* Here we must call dfu_get_buf(dfu) first to be sure that dfu_buf_size
* has been properly initialized - e.g. if "dfu_bufsiz" has been taken
* into account.
*/
dfu_get_buf(dfu);
dfu_buf_size = dfu_get_buf_size();
debug("%s: dfu buf size: %lu\n", __func__, dfu_buf_size);
for (i = 0; left > 0; i++) {
write = min(dfu_buf_size, left);
debug("%s: dp: 0x%p left: %lu write: %lu\n", __func__,
dp, left, write);
ret = dfu_write(dfu, dp, write, i);
if (ret) {
error("DFU write failed\n");
return ret;
}
dp += write;
left -= write;
}
ret = dfu_flush(dfu, NULL, 0, i);
if (ret)
error("DFU flush failed!");
return ret;
}

15
include/dfu.h
View file

@ -162,6 +162,21 @@ bool dfu_usb_get_reset(void);
int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
/**
* dfu_write_from_mem_addr - write data from memory to DFU managed medium
*
* This function adds support for writing data starting from fixed memory
* address (like $loadaddr) to dfu managed medium (e.g. NAND, MMC, file system)
*
* @param dfu - dfu entity to which we want to store data
* @param buf - fixed memory addres from where data starts
* @param size - number of bytes to write
*
* @return - 0 on success, other value on failure
*/
int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
/* Device specific */
#ifdef CONFIG_DFU_MMC
extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s);