commonlib/storage: Add common eMMC functions

Now that multiple platforms are trying to initialize eMMC in coreboot
instead of depthcharge, lets move common functionality into commonlib
instead of copying the same functionality between multiple platforms.
Note for consistency, changed name of set_early_mmc_wake_status() to
mmc_set_early_wake_status().  Also adding an mmc_send_cmd1() function
for retrieving the Operating Conditions Register (OCR) contents.

BUG=b:218406702
BRANCH=None
TEST=emerge-herobrine coreboot chromeos-bootimage
     flash onto villager device and make sure still boots ChromeOS

Change-Id: Id00535b05bbd379081712601ef10e762c1831747
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71827
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/src/commonlib/storage/mmc.c b/src/commonlib/storage/mmc.c
index 2aaa29245f..135105db96 100644
--- a/src/commonlib/storage/mmc.c
+++ b/src/commonlib/storage/mmc.c
@@ -4,6 +4,7 @@
  * This code is controller independent
  */
 
+#include <cbmem.h>
 #include <commonlib/storage.h>
 #include <delay.h>
 #include "mmc.h"
@@ -529,3 +530,47 @@ const char *mmc_partition_name(struct storage_media *media,
 		return "";
 	return partition_name[partition_number];
 }
+
+void mmc_set_early_wake_status(int32_t status)
+{
+	int32_t *ms_cbmem;
+
+	ms_cbmem = cbmem_add(CBMEM_ID_MMC_STATUS, sizeof(status));
+
+	if (!ms_cbmem) {
+		printk(BIOS_ERR,
+		       "%s: Failed to add early mmc wake status to cbmem!\n",
+		       __func__);
+		return;
+	}
+
+	*ms_cbmem = status;
+}
+
+int mmc_send_cmd1(struct storage_media *media)
+{
+	int err;
+
+	/* Reset emmc, send CMD0 */
+	if (sd_mmc_go_idle(media))
+		goto out_err;
+
+	/* Send CMD1 */
+	err = mmc_send_op_cond(media);
+	if (err == 0) {
+		if (media->op_cond_response & OCR_HCS)
+			mmc_set_early_wake_status(MMC_STATUS_CMD1_READY_HCS);
+		else
+			mmc_set_early_wake_status(MMC_STATUS_CMD1_READY);
+	} else if (err == CARD_IN_PROGRESS) {
+		mmc_set_early_wake_status(MMC_STATUS_CMD1_IN_PROGRESS);
+	} else {
+		goto out_err;
+	}
+
+	return 0;
+
+out_err:
+	mmc_set_early_wake_status(MMC_STATUS_NEED_RESET);
+	return -1;
+}