static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
dfu_buf[DFU_DATA_BUF_SIZE];
+static int dfu_write_buffer_drain(struct dfu_entity *dfu)
+{
+ long w_size;
+ int ret;
+
+ /* flush size? */
+ w_size = dfu->i_buf - dfu->i_buf_start;
+ if (w_size == 0)
+ return 0;
+
+ /* update CRC32 */
+ dfu->crc = crc32(dfu->crc, dfu->i_buf_start, w_size);
+
+ ret = dfu->write_medium(dfu, dfu->offset, dfu->i_buf_start, &w_size);
+ if (ret)
+ debug("%s: Write error!\n", __func__);
+
+ /* point back */
+ dfu->i_buf = dfu->i_buf_start;
+
+ /* update offset */
+ dfu->offset += w_size;
+
+ puts("#");
+
+ return ret;
+}
+
int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
{
- static unsigned char *i_buf;
- static int i_blk_seq_num;
- long w_size = 0;
int ret = 0;
+ int tret;
+
+ debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x offset: 0x%llx bufoffset: 0x%x\n",
+ __func__, dfu->name, buf, size, blk_seq_num, dfu->offset,
+ dfu->i_buf - dfu->i_buf_start);
+
+ if (!dfu->inited) {
+ /* initial state */
+ dfu->crc = 0;
+ dfu->offset = 0;
+ dfu->i_blk_seq_num = 0;
+ dfu->i_buf_start = dfu_buf;
+ dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
+ dfu->i_buf = dfu->i_buf_start;
+
+ dfu->inited = 1;
+ }
- debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
- __func__, dfu->name, buf, size, blk_seq_num, i_buf);
+ if (dfu->i_blk_seq_num != blk_seq_num) {
+ printf("%s: Wrong sequence number! [%d] [%d]\n",
+ __func__, dfu->i_blk_seq_num, blk_seq_num);
+ return -1;
+ }
- if (blk_seq_num == 0) {
- i_buf = dfu_buf;
- i_blk_seq_num = 0;
+ /* DFU 1.1 standard says:
+ * The wBlockNum field is a block sequence number. It increments each
+ * time a block is transferred, wrapping to zero from 65,535. It is used
+ * to provide useful context to the DFU loader in the device."
+ *
+ * This means that it's a 16 bit counter that roll-overs at
+ * 0xffff -> 0x0000. By having a typical 4K transfer block
+ * we roll-over at exactly 256MB. Not very fun to debug.
+ *
+ * Handling rollover, and having an inited variable,
+ * makes things work.
+ */
+
+ /* handle rollover */
+ dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
+
+ /* flush buffer if overflow */
+ if ((dfu->i_buf + size) > dfu->i_buf_end) {
+ tret = dfu_write_buffer_drain(dfu);
+ if (ret == 0)
+ ret = tret;
}
- if (i_blk_seq_num++ != blk_seq_num) {
- printf("%s: Wrong sequence number! [%d] [%d]\n",
- __func__, i_blk_seq_num, blk_seq_num);
+ /* we should be in buffer now (if not then size too large) */
+ if ((dfu->i_buf + size) > dfu->i_buf_end) {
+ printf("%s: Wrong size! [%d] [%d] - %d\n",
+ __func__, dfu->i_blk_seq_num, blk_seq_num, size);
return -1;
}
- memcpy(i_buf, buf, size);
- i_buf += size;
+ memcpy(dfu->i_buf, buf, size);
+ dfu->i_buf += size;
+ /* if end or if buffer full flush */
+ if (size == 0 || (dfu->i_buf + size) > dfu->i_buf_end) {
+ tret = dfu_write_buffer_drain(dfu);
+ if (ret == 0)
+ ret = tret;
+ }
+
+ /* end? */
if (size == 0) {
- /* Integrity check (if needed) */
- debug("%s: %s %d [B] CRC32: 0x%x\n", __func__, dfu->name,
- i_buf - dfu_buf, crc32(0, dfu_buf, i_buf - dfu_buf));
+ /* Now try and flush to the medium if needed. */
+ if (dfu->flush_medium)
+ ret = dfu->flush_medium(dfu);
+ printf("\nDFU complete CRC32: 0x%08x\n", dfu->crc);
- w_size = i_buf - dfu_buf;
- ret = dfu->write_medium(dfu, dfu_buf, &w_size);
- if (ret)
- debug("%s: Write error!\n", __func__);
+ /* clear everything */
+ dfu->crc = 0;
+ dfu->offset = 0;
+ dfu->i_blk_seq_num = 0;
+ dfu->i_buf_start = dfu_buf;
+ dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
+ dfu->i_buf = dfu->i_buf_start;
+
+ dfu->inited = 0;
- i_blk_seq_num = 0;
- i_buf = NULL;
- return ret;
}
- return ret;
+ return ret = 0 ? size : ret;
+}
+
+static int dfu_read_buffer_fill(struct dfu_entity *dfu, void *buf, int size)
+{
+ long chunk;
+ int ret, readn;
+
+ readn = 0;
+ while (size > 0) {
+ /* get chunk that can be read */
+ chunk = min(size, dfu->b_left);
+ /* consume */
+ if (chunk > 0) {
+ memcpy(buf, dfu->i_buf, chunk);
+ dfu->crc = crc32(dfu->crc, buf, chunk);
+ dfu->i_buf += chunk;
+ dfu->b_left -= chunk;
+ size -= chunk;
+ buf += chunk;
+ readn += chunk;
+ }
+
+ /* all done */
+ if (size > 0) {
+ /* no more to read */
+ if (dfu->r_left == 0)
+ break;
+
+ dfu->i_buf = dfu->i_buf_start;
+ dfu->b_left = dfu->i_buf_end - dfu->i_buf_start;
+
+ /* got to read, but buffer is empty */
+ if (dfu->b_left > dfu->r_left)
+ dfu->b_left = dfu->r_left;
+ ret = dfu->read_medium(dfu, dfu->offset, dfu->i_buf,
+ &dfu->b_left);
+ if (ret != 0) {
+ debug("%s: Read error!\n", __func__);
+ return ret;
+ }
+ dfu->offset += dfu->b_left;
+ dfu->r_left -= dfu->b_left;
+
+ puts("#");
+ }
+ }
+
+ return readn;
}
int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
{
- static unsigned char *i_buf;
- static int i_blk_seq_num;
- static long r_size;
- static u32 crc;
int ret = 0;
debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
- __func__, dfu->name, buf, size, blk_seq_num, i_buf);
-
- if (blk_seq_num == 0) {
- i_buf = dfu_buf;
- ret = dfu->read_medium(dfu, i_buf, &r_size);
- debug("%s: %s %ld [B]\n", __func__, dfu->name, r_size);
- i_blk_seq_num = 0;
- /* Integrity check (if needed) */
- crc = crc32(0, dfu_buf, r_size);
+ __func__, dfu->name, buf, size, blk_seq_num, dfu->i_buf);
+
+ if (!dfu->inited) {
+ ret = dfu->read_medium(dfu, 0, buf, &dfu->r_left);
+ if (ret != 0) {
+ debug("%s: failed to get r_left\n", __func__);
+ return ret;
+ }
+
+ debug("%s: %s %ld [B]\n", __func__, dfu->name, dfu->r_left);
+
+ dfu->i_blk_seq_num = 0;
+ dfu->crc = 0;
+ dfu->offset = 0;
+ dfu->i_buf_start = dfu_buf;
+ dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
+ dfu->i_buf = dfu->i_buf_start;
+ dfu->b_left = 0;
+
+ dfu->inited = 1;
}
- if (i_blk_seq_num++ != blk_seq_num) {
+ if (dfu->i_blk_seq_num != blk_seq_num) {
printf("%s: Wrong sequence number! [%d] [%d]\n",
- __func__, i_blk_seq_num, blk_seq_num);
+ __func__, dfu->i_blk_seq_num, blk_seq_num);
return -1;
}
+ /* handle rollover */
+ dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
- if (r_size >= size) {
- memcpy(buf, i_buf, size);
- i_buf += size;
- r_size -= size;
- return size;
- } else {
- memcpy(buf, i_buf, r_size);
- i_buf += r_size;
- debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name, crc);
- puts("UPLOAD ... done\nCtrl+C to exit ...\n");
+ ret = dfu_read_buffer_fill(dfu, buf, size);
+ if (ret < 0) {
+ printf("%s: Failed to fill buffer\n", __func__);
+ return -1;
+ }
+
+ if (ret < size) {
+ debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name, dfu->crc);
+ puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
- i_buf = NULL;
- i_blk_seq_num = 0;
- crc = 0;
- return r_size;
+ dfu->i_blk_seq_num = 0;
+ dfu->crc = 0;
+ dfu->offset = 0;
+ dfu->i_buf_start = dfu_buf;
+ dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
+ dfu->i_buf = dfu->i_buf_start;
+ dfu->b_left = 0;
+
+ dfu->inited = 0;
}
+
return ret;
}
projects / people / ms / u-boot.git / blobdiff