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mmc: sandbox: Add support for writing

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This adds support writing to the sandbox mmc backed by an in-memory
buffer. The unit test has been updated to test reading, writing, and
erasing. I'm not sure what MMCs erase to; I picked 0, but if it's 0xFF
then that can be easily changed.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sean Anderson
2021-02-05 09:38:53 -05:00
committed by Marek Vasut
parent c28d5d704d
commit 3f6fb77175
2 changed files with 51 additions and 11 deletions
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19
test/dm/mmc.c
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@@ -29,16 +29,25 @@ static int dm_test_mmc_blk(struct unit_test_state *uts)
{
struct udevice *dev;
struct blk_desc *dev_desc;
char cmp[1024];
int i;
char write[1024], read[1024];
ut_assertok(uclass_get_device(UCLASS_MMC, 0, &dev));
ut_assertok(blk_get_device_by_str("mmc", "0", &dev_desc));
/* Read a few blocks and look for the string we expect */
/* Write a few blocks and verify that we get the same data back */
ut_asserteq(512, dev_desc->blksz);
memset(cmp, '\0', sizeof(cmp));
ut_asserteq(2, blk_dread(dev_desc, 0, 2, cmp));
ut_assertok(strcmp(cmp, "this is a test"));
for (i = 0; i < sizeof(write); i++)
write[i] = i;
ut_asserteq(2, blk_dwrite(dev_desc, 0, 2, write));
ut_asserteq(2, blk_dread(dev_desc, 0, 2, read));
ut_asserteq_mem(write, read, sizeof(write));
/* Now erase them */
memset(write, '\0', sizeof(write));
ut_asserteq(2, blk_derase(dev_desc, 0, 2));
ut_asserteq(2, blk_dread(dev_desc, 0, 2, read));
ut_asserteq_mem(write, read, sizeof(write));
return 0;
}