1 files changed, 95 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/scs/mmc.c b/src/soc/intel/common/block/scs/mmc.c
new file mode 100644
index 0000000000..5b2e2c7d33
--- /dev/null
+++ b/src/soc/intel/common/block/scs/mmc.c
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <console/console.h>
+#include <intelblocks/chip.h>
+#include <intelblocks/mmc.h>
+
+static int mmc_write_dll_reg(void *bar, uint32_t reg, uint32_t val)
+{
+	int ret = 0;
+	if (val) {
+		write32(bar + reg, val);
+		ret = 1;
+	}
+	return ret;
+}
+
+int set_mmc_dll(void *bar)
+{
+	const struct soc_intel_common_config *common_config;
+	const struct mmc_dll_params *dll_params;
+	int override = 0;
+
+	common_config = chip_get_common_soc_structure();
+	dll_params = &common_config->emmc_dll;
+
+	override |= mmc_write_dll_reg(bar, EMMC_TX_CMD_CNTL_OFFSET,
+		dll_params->emmc_tx_cmd_cntl);
+
+	override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL1_OFFSET,
+		dll_params->emmc_tx_data_cntl1);
+
+	override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL2_OFFSET,
+		dll_params->emmc_tx_data_cntl2);
+
+	override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL1_OFFSET,
+		dll_params->emmc_rx_cmd_data_cntl1);
+
+	override |= mmc_write_dll_reg(bar, EMMC_RX_STROBE_CNTL_OFFSET,
+		dll_params->emmc_rx_strobe_cntl);
+
+	override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL2_OFFSET,
+		dll_params->emmc_rx_cmd_data_cntl2);
+
+	if (override == 0) {
+		printk(BIOS_INFO, "Skip Emmc dll value programming\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static void mmc_soc_init(struct device *dev)
+{
+	const struct resource *res;
+
+	if (!CONFIG(SOC_INTEL_COMMON_MMC_OVERRIDE))
+		return;
+
+	res = find_resource(dev, PCI_BASE_ADDRESS_0);
+	set_mmc_dll((void *)(uintptr_t)(res->base));
+}
+
+static struct device_operations dev_ops = {
+	.read_resources			= pci_dev_read_resources,
+	.set_resources			= pci_dev_set_resources,
+	.enable_resources		= pci_dev_enable_resources,
+	.init				= mmc_soc_init,
+	.ops_pci			= &pci_dev_ops_pci,
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_INTEL_CMP_EMMC,
+	0
+};
+
+static const struct pci_driver pch_sd __pci_driver = {
+	.ops		= &dev_ops,
+	.vendor		= PCI_VENDOR_ID_INTEL,
+	.devices	= pci_device_ids,
+};