mmc: set MMC_QUIRK_KNOWN_WORKING_SD_CQ on Raspberry Pi class A2 cards

These cards have a known-good CQ implementation and are based on a Longsys product. Add the MANFID for Longsys SD, and the particular CID details for the Pi card. Signed-off-by: Jonathan Bell <[email protected]>
raspberrypi · Jan 10, 2025 · 15fd6ee · 15fd6ee
1 parent cae52db
commit 15fd6ee
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diff --git a/drivers/mmc/core/card.h b/drivers/mmc/core/card.h
@@ -93,6 +93,7 @@ struct mmc_fixup {
 #define CID_MANFID_KINGSTON     0x70
 #define CID_MANFID_HYNIX	0x90
 #define CID_MANFID_KINGSTON_SD	0x9F
+#define CID_MANFID_LONGSYS_SD	0xAD
 #define CID_MANFID_NUMONYX	0xFE
 
 #define END_FIXUP { NULL }

diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
@@ -66,6 +66,12 @@ static const struct mmc_fixup __maybe_unused mmc_sd_fixups[] = {
 		   0, -1ull, SDIO_ANY_ID, SDIO_ANY_ID, add_quirk_sd,
 		   MMC_QUIRK_BROKEN_SD_CACHE, EXT_CSD_REV_ANY),
 
+	/* SD A2 allow-list - only trust CQ on these cards */
+	/* Raspberry Pi A2 cards */
+	_FIXUP_EXT(CID_NAME_ANY, CID_MANFID_LONGSYS_SD, 0x4c53, CID_YEAR_ANY, CID_MONTH_ANY,
+		   cid_rev(1, 0, 0, 0), -1ull, SDIO_ANY_ID, SDIO_ANY_ID, add_quirk_sd,
+		   MMC_QUIRK_WORKING_SD_CQ, EXT_CSD_REV_ANY),
+
 	END_FIXUP
 };