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 --- drivers/dfu/dfu.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ include/dfu.h | 1 + 2 files changed, 49 insertions(+)
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c index 332be67..3fbbecc 100644 --- a/drivers/dfu/dfu.c +++ b/drivers/dfu/dfu.c @@ -568,3 +568,51 @@ int dfu_get_alt(char *name)
return -ENODEV; } + +/** + * dfu_write_from_mem_addr - this function adds support for writing data + * starting from fixed memory address (like $loadaddr) + * to dfu managed medium (e.g. NAND, MMC) + * + * @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) +{ + unsigned long dfu_buf_size, write; + int i, ret = 0, left = size; + 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 = (dfu_buf_size < left ? dfu_buf_size : left); + + debug("%s: dp: 0x%p left: %d 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; +} diff --git a/include/dfu.h b/include/dfu.h index adad863..ff4db5d 100644 --- a/include/dfu.h +++ b/include/dfu.h @@ -162,6 +162,7 @@ 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); +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);