soc/qualcomm/sc7280: init eMMC

Use common sdhci driver in coreboot to initialize eMMC for sc7280.
This should allow us to initialize eMMC earlier in the boot process,
taking it out of the critical path.

BUG=b:254092907
BRANCH=None
TEST=emerge-herobrine coreboot chromeos-bootimage

Change-Id: Ifa88da500e82b44d7523f2e68763e01399c89f4d
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71829
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/soc/qualcomm/sc7280/sdhci.c b/src/soc/qualcomm/sc7280/sdhci.c
new file mode 100644
index 0000000000..6e676f4feb
--- /dev/null
+++ b/src/soc/qualcomm/sc7280/sdhci.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <commonlib/sdhci.h>
+#include <commonlib/storage.h>
+#include <commonlib/storage/sd_mmc.h>
+#include <commonlib/storage/sdhci.h>
+#include <commonlib/sd_mmc_ctrlr.h>
+#include <soc/addressmap.h>
+#include <soc/sdhci.h>
+#include <soc/sdhci_msm.h>
+
+int qc_emmc_early_init(void)
+{
+	struct sd_mmc_ctrlr *ctrlr;
+	struct storage_media media = {0};
+
+	ctrlr = new_sdhci_msm_host((void *)(uintptr_t)SDC1_HC_BASE);
+	if (ctrlr == NULL)
+		return -1;
+
+	media.ctrlr = ctrlr;
+	SET_BUS_WIDTH(ctrlr, 1);
+	SET_CLOCK(ctrlr, 384 * 1000);
+
+	/* Send CMD1 */
+	return mmc_send_cmd1(&media);
+}