From 6b38cc2f2b8588fb50c606306ada6e48f20ff4ee Mon Sep 17 00:00:00 2001
From: Chee Hong Ang <chee.hong.ang@intel.com>
Date: Thu, 24 Dec 2020 18:21:04 +0800
Subject: [PATCH] mmc: dwmmc: socfpga: Add ATF support for MMC driver
In non-secure mode (EL2), MMC driver calls the SMC/PSCI services
provided by ATF to set SDMMC's DRVSEL and SMPLSEL.
Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
---
drivers/mmc/socfpga_dw_mmc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
index 7d8c452a73..aa0d3a2222 100644
--- a/drivers/mmc/socfpga_dw_mmc.c
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -6,6 +6,7 @@
#include <common.h>
#include <log.h>
#include <asm/arch/clock_manager.h>
+#include <asm/arch/secure_reg_helper.h>
#include <asm/arch/system_manager.h>
#include <clk.h>
#include <dm.h>
@@ -13,6 +14,7 @@
#include <errno.h>
#include <fdtdec.h>
#include <dm/device_compat.h>
+#include <linux/intel-smc.h>
#include <linux/libfdt.h>
#include <linux/err.h>
#include <malloc.h>
@@ -58,10 +60,22 @@ static int socfpga_dwmci_clksel(struct dwmci_host *host)
debug("%s: drvsel %d smplsel %d\n", __func__,
priv->drvsel, priv->smplsel);
+
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_ATF)
+ int ret;
+
+ ret = socfpga_secure_reg_write32(SOCFPGA_SECURE_REG_SYSMGR_SOC64_SDMMC,
+ sdmmc_mask);
+ if (ret) {
+ printf("DWMMC: Failed to set clksel via SMC call");
+ return ret;
+ }
+#else
writel(sdmmc_mask, socfpga_get_sysmgr_addr() + SYSMGR_SDMMC);
debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __func__,
readl(socfpga_get_sysmgr_addr() + SYSMGR_SDMMC));
+#endif
/* Enable SDMMC clock */
setbits_le32(socfpga_get_clkmgr_addr() + CLKMGR_PERPLL_EN,
--
2.39.5