2019-02-09 18:46:43 +00:00
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From 4cb4e6156fa5f942cf004b3e34677f1ee6f32cab Mon Sep 17 00:00:00 2001
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From: Dmitry Osipenko <digetx@gmail.com>
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Date: Tue, 6 Oct 2015 19:27:48 +0300
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2019-02-24 19:33:39 +00:00
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Subject: [PATCH] mmc: core: Add a quirk for NVIDIA Tegra EMMC
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2019-02-09 18:46:43 +00:00
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Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
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(cherry picked from commit ab6cd574c16380931529501c367ae50a3ee96b3e)
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Signed-off-by: Sergey Larin <cerg2010cerg2010@mail.ru>
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---
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drivers/mmc/core/mmc.c | 11 ++++++++++-
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1 file changed, 10 insertions(+), 1 deletion(-)
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diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
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index 55997cf84b39..643fbe58eb0f 100644
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--- a/drivers/mmc/core/mmc.c
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+++ b/drivers/mmc/core/mmc.c
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@@ -408,8 +408,17 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
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ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
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/* Cards with density > 2GiB are sector addressed */
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- if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
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+ if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) {
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+ if (card->host->caps & MMC_CAP_NONREMOVABLE) {
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+ /*
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+ * Size is in 256K chunks, i.e. 512 sectors each.
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+ * This algorithm is defined and used by NVIDIA,
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+ * according to eMMC 4.41, size is in 128K chunks.
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+ */
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+ card->ext_csd.sectors -= ext_csd[EXT_CSD_BOOT_MULT] * 512;
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+ }
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mmc_card_set_blockaddr(card);
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+ }
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}
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card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
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--
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2.20.1
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