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cpu/sam0_common: mtd_sdhc: ensure source address alignment

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The source / destination address of the SDHC transfer needs to be
word-aligned.

Use the mtd buffer to fix the alignment if `mtd_write_page` is used,
otherwise return -ENOTSUP.
This commit is contained in:
Benjamin Valentin 2022-06-16 18:58:10 +02:00
parent 809f9ed174
commit e8fd493f41
1 changed files with 2 additions and 2 deletions
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4
cpu/sam0_common/sam0_sdhc/mtd_sdhc.c
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@ -69,7 +69,7 @@ static int _read_page(mtd_dev_t *dev, void *buff, uint32_t page,
DEBUG("%s(%lu, %lu, %lu)\n", __func__, page, offset, size);
/* emulate unaligned / sub-page read */
if (pages == 0 || offset) {
if (pages == 0 || offset || ((uintptr_t)buff & 0x3)) {
#if IS_USED(MODULE_MTD_WRITE_PAGE)
if (dev->work_area == NULL) {
DEBUG("mtd_sdhc: no work area\n");
@ -105,7 +105,7 @@ static int _write_page(mtd_dev_t *dev, const void *buff, uint32_t page,
DEBUG("%s(%lu, %lu, %lu)\n", __func__, page, offset, size);
/* emulate unaligned / sub-page write */
if (pages == 0 || offset) {
if (pages == 0 || offset || ((uintptr_t)buff & 0x3)) {
#if IS_USED(MODULE_MTD_WRITE_PAGE)
if (dev->work_area == NULL) {
DEBUG("mtd_sdhc: no work area\n");