+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
+#include <dm/device_compat.h>
#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/sizes.h>
{
void __iomem *reg = plat->hrs_addr + SDHCI_CDNS_HRS06;
u32 tmp;
+ int i, ret;
if (WARN_ON(!FIELD_FIT(SDHCI_CDNS_HRS06_TUNE, val)))
return -EINVAL;
tmp = readl(reg);
tmp &= ~SDHCI_CDNS_HRS06_TUNE;
tmp |= FIELD_PREP(SDHCI_CDNS_HRS06_TUNE, val);
- tmp |= SDHCI_CDNS_HRS06_TUNE_UP;
- writel(tmp, reg);
- return readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_HRS06_TUNE_UP),
- 1);
+ /*
+ * Workaround for IP errata:
+ * The IP6116 SD/eMMC PHY design has a timing issue on receive data
+ * path. Send tune request twice.
+ */
+ for (i = 0; i < 2; i++) {
+ tmp |= SDHCI_CDNS_HRS06_TUNE_UP;
+ writel(tmp, reg);
+
+ ret = readl_poll_timeout(reg, tmp,
+ !(tmp & SDHCI_CDNS_HRS06_TUNE_UP), 1);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
static int __maybe_unused sdhci_cdns_execute_tuning(struct udevice *dev,
if (ret)
return ret;
+ host->mmc = &plat->mmc;
+ host->mmc->dev = dev;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
return ret;
upriv->mmc = &plat->mmc;
- host->mmc = &plat->mmc;
host->mmc->priv = host;
return sdhci_probe(dev);