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![Patrick Delaunay](/assets/img/avatar_default.png)
Add the support of MTD partition for the MTD backend. The expected dfu_alt_info for one alternate on the mtd device : <name> part <part_id> <name> partubi <part_id> "partubi" also erase up to the end of the partition after write operation. For example: dfu_alt_info = "spl part 1;u-boot part 2; UBI partubi 3" U-Boot> dfu 0 mtd nand0 Acked-by: Lukasz Majewski <lukma@denx.de> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
312 lines
7.1 KiB
C
312 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* dfu_mtd.c -- DFU for MTD device.
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*
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* Copyright (C) 2019,STMicroelectronics - All Rights Reserved
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*
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* Based on dfu_nand.c
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*/
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#include <common.h>
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#include <dfu.h>
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#include <mtd.h>
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#include <jffs2/load_kernel.h>
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static bool mtd_is_aligned_with_block_size(struct mtd_info *mtd, u64 size)
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{
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return !do_div(size, mtd->erasesize);
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}
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static int mtd_block_op(enum dfu_op op, struct dfu_entity *dfu,
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u64 offset, void *buf, long *len)
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{
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u64 off, lim, remaining;
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struct mtd_info *mtd = dfu->data.mtd.info;
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struct mtd_oob_ops io_op = {};
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int ret = 0;
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bool has_pages = mtd->type == MTD_NANDFLASH ||
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mtd->type == MTD_MLCNANDFLASH;
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/* if buf == NULL return total size of the area */
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if (!buf) {
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*len = dfu->data.mtd.size;
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return 0;
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}
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off = dfu->data.mtd.start + offset + dfu->bad_skip;
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lim = dfu->data.mtd.start + dfu->data.mtd.size;
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if (off >= lim) {
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printf("Limit reached 0x%llx\n", lim);
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*len = 0;
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return op == DFU_OP_READ ? 0 : -EIO;
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}
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/* limit request with the available size */
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if (off + *len >= lim)
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*len = lim - off;
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if (!mtd_is_aligned_with_block_size(mtd, off)) {
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printf("Offset not aligned with a block (0x%x)\n",
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mtd->erasesize);
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return 0;
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}
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/* first erase */
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if (op == DFU_OP_WRITE) {
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struct erase_info erase_op = {};
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remaining = round_up(*len, mtd->erasesize);
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erase_op.mtd = mtd;
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erase_op.addr = off;
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erase_op.len = mtd->erasesize;
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erase_op.scrub = 0;
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while (remaining) {
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if (erase_op.addr + remaining > lim) {
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printf("Limit reached 0x%llx while erasing at offset 0x%llx\n",
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lim, off);
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return -EIO;
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}
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ret = mtd_erase(mtd, &erase_op);
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if (ret) {
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/* Abort if its not a bad block error */
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if (ret != -EIO) {
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printf("Failure while erasing at offset 0x%llx\n",
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erase_op.fail_addr);
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return 0;
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}
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printf("Skipping bad block at 0x%08llx\n",
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erase_op.addr);
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} else {
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remaining -= mtd->erasesize;
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}
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/* Continue erase behind bad block */
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erase_op.addr += mtd->erasesize;
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}
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}
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io_op.mode = MTD_OPS_AUTO_OOB;
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io_op.len = *len;
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if (has_pages && io_op.len > mtd->writesize)
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io_op.len = mtd->writesize;
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io_op.ooblen = 0;
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io_op.datbuf = buf;
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io_op.oobbuf = NULL;
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/* Loop over to do the actual read/write */
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remaining = *len;
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while (remaining) {
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if (off + remaining > lim) {
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printf("Limit reached 0x%llx while %s at offset 0x%llx\n",
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lim, op == DFU_OP_READ ? "reading" : "writing",
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off);
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if (op == DFU_OP_READ) {
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*len -= remaining;
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return 0;
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} else {
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return -EIO;
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}
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}
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/* Skip the block if it is bad */
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if (mtd_is_aligned_with_block_size(mtd, off) &&
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mtd_block_isbad(mtd, off)) {
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off += mtd->erasesize;
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dfu->bad_skip += mtd->erasesize;
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continue;
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}
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if (op == DFU_OP_READ)
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ret = mtd_read_oob(mtd, off, &io_op);
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else
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ret = mtd_write_oob(mtd, off, &io_op);
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if (ret) {
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printf("Failure while %s at offset 0x%llx\n",
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op == DFU_OP_READ ? "reading" : "writing", off);
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return -EIO;
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}
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off += io_op.retlen;
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remaining -= io_op.retlen;
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io_op.datbuf += io_op.retlen;
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io_op.len = remaining;
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if (has_pages && io_op.len > mtd->writesize)
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io_op.len = mtd->writesize;
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}
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return ret;
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}
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static int dfu_get_medium_size_mtd(struct dfu_entity *dfu, u64 *size)
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{
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*size = dfu->data.mtd.info->size;
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return 0;
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}
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static int dfu_read_medium_mtd(struct dfu_entity *dfu, u64 offset, void *buf,
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long *len)
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{
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int ret = -1;
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switch (dfu->layout) {
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case DFU_RAW_ADDR:
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ret = mtd_block_op(DFU_OP_READ, dfu, offset, buf, len);
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break;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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}
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return ret;
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}
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static int dfu_write_medium_mtd(struct dfu_entity *dfu,
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u64 offset, void *buf, long *len)
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{
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int ret = -1;
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switch (dfu->layout) {
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case DFU_RAW_ADDR:
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ret = mtd_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
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break;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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}
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return ret;
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}
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static int dfu_flush_medium_mtd(struct dfu_entity *dfu)
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{
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struct mtd_info *mtd = dfu->data.mtd.info;
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u64 remaining;
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int ret;
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/* in case of ubi partition, erase rest of the partition */
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if (dfu->data.nand.ubi) {
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struct erase_info erase_op = {};
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erase_op.mtd = dfu->data.mtd.info;
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erase_op.addr = round_up(dfu->data.mtd.start + dfu->offset +
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dfu->bad_skip, mtd->erasesize);
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erase_op.len = mtd->erasesize;
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erase_op.scrub = 0;
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remaining = dfu->data.mtd.start + dfu->data.mtd.size -
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erase_op.addr;
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while (remaining) {
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ret = mtd_erase(mtd, &erase_op);
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if (ret) {
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/* Abort if its not a bad block error */
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if (ret != -EIO)
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break;
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printf("Skipping bad block at 0x%08llx\n",
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erase_op.addr);
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}
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/* Skip bad block and continue behind it */
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erase_op.addr += mtd->erasesize;
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remaining -= mtd->erasesize;
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}
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}
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return 0;
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}
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static unsigned int dfu_polltimeout_mtd(struct dfu_entity *dfu)
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{
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/*
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* Currently, Poll Timeout != 0 is only needed on nand
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* ubi partition, as sectors which are not used need
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* to be erased
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*/
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if (dfu->data.nand.ubi)
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return DFU_MANIFEST_POLL_TIMEOUT;
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return DFU_DEFAULT_POLL_TIMEOUT;
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}
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int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s)
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{
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char *st;
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struct mtd_info *mtd;
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bool has_pages;
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int ret, part;
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mtd = get_mtd_device_nm(devstr);
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if (IS_ERR_OR_NULL(mtd))
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return -ENODEV;
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put_mtd_device(mtd);
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dfu->dev_type = DFU_DEV_MTD;
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dfu->data.mtd.info = mtd;
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has_pages = mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH;
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dfu->max_buf_size = has_pages ? mtd->erasesize : 0;
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st = strsep(&s, " ");
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if (!strcmp(st, "raw")) {
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dfu->layout = DFU_RAW_ADDR;
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dfu->data.mtd.start = simple_strtoul(s, &s, 16);
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s++;
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dfu->data.mtd.size = simple_strtoul(s, &s, 16);
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} else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) {
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char mtd_id[32];
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struct mtd_device *mtd_dev;
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u8 part_num;
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struct part_info *pi;
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dfu->layout = DFU_RAW_ADDR;
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part = simple_strtoul(s, &s, 10);
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sprintf(mtd_id, "%s,%d", devstr, part - 1);
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printf("using id '%s'\n", mtd_id);
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mtdparts_init();
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ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
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if (ret != 0) {
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printf("Could not locate '%s'\n", mtd_id);
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return -1;
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}
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dfu->data.mtd.start = pi->offset;
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dfu->data.mtd.size = pi->size;
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if (!strcmp(st, "partubi"))
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dfu->data.mtd.ubi = 1;
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} else {
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printf("%s: Memory layout (%s) not supported!\n", __func__, st);
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return -1;
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}
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if (!mtd_is_aligned_with_block_size(mtd, dfu->data.mtd.start)) {
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printf("Offset not aligned with a block (0x%x)\n",
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mtd->erasesize);
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return -EINVAL;
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}
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if (!mtd_is_aligned_with_block_size(mtd, dfu->data.mtd.size)) {
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printf("Size not aligned with a block (0x%x)\n",
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mtd->erasesize);
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return -EINVAL;
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}
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dfu->get_medium_size = dfu_get_medium_size_mtd;
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dfu->read_medium = dfu_read_medium_mtd;
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dfu->write_medium = dfu_write_medium_mtd;
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dfu->flush_medium = dfu_flush_medium_mtd;
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dfu->poll_timeout = dfu_polltimeout_mtd;
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/* initial state */
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dfu->inited = 0;
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return 0;
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}
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