1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-dove.c b/drivers/mmc/host/sdhci-dove.c
new file mode 100644
index 000000000..5e5bf82e5
--- /dev/null
+++ b/drivers/mmc/host/sdhci-dove.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
+ *
+ * Author: Saeed Bishara <saeed@marvell.com>
+ *	   Mike Rapoport <mike@compulab.co.il>
+ * Based on sdhci-cns3xxx.c
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include "sdhci-pltfm.h"
+
+static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
+{
+	u16 ret;
+
+	switch (reg) {
+	case SDHCI_HOST_VERSION:
+	case SDHCI_SLOT_INT_STATUS:
+		/* those registers don't exist */
+		return 0;
+	default:
+		ret = readw(host->ioaddr + reg);
+	}
+	return ret;
+}
+
+static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
+{
+	u32 ret;
+
+	ret = readl(host->ioaddr + reg);
+
+	switch (reg) {
+	case SDHCI_CAPABILITIES:
+		/* Mask the support for 3.0V */
+		ret &= ~SDHCI_CAN_VDD_300;
+		break;
+	}
+	return ret;
+}
+
+static const struct sdhci_ops sdhci_dove_ops = {
+	.read_w	= sdhci_dove_readw,
+	.read_l	= sdhci_dove_readl,
+	.set_clock = sdhci_set_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.reset = sdhci_reset,
+	.set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_dove_pdata = {
+	.ops	= &sdhci_dove_ops,
+	.quirks	= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
+		  SDHCI_QUIRK_NO_BUSY_IRQ |
+		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+		  SDHCI_QUIRK_FORCE_DMA |
+		  SDHCI_QUIRK_NO_HISPD_BIT,
+};
+
+static int sdhci_dove_probe(struct platform_device *pdev)
+{
+	struct sdhci_host *host;
+	struct sdhci_pltfm_host *pltfm_host;
+	int ret;
+
+	host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	pltfm_host = sdhci_priv(host);
+	pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
+
+	if (!IS_ERR(pltfm_host->clk))
+		clk_prepare_enable(pltfm_host->clk);
+
+	ret = mmc_of_parse(host->mmc);
+	if (ret)
+		goto err_sdhci_add;
+
+	ret = sdhci_add_host(host);
+	if (ret)
+		goto err_sdhci_add;
+
+	return 0;
+
+err_sdhci_add:
+	clk_disable_unprepare(pltfm_host->clk);
+	sdhci_pltfm_free(pdev);
+	return ret;
+}
+
+static const struct of_device_id sdhci_dove_of_match_table[] = {
+	{ .compatible = "marvell,dove-sdhci", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
+
+static struct platform_driver sdhci_dove_driver = {
+	.driver		= {
+		.name	= "sdhci-dove",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.pm	= &sdhci_pltfm_pmops,
+		.of_match_table = sdhci_dove_of_match_table,
+	},
+	.probe		= sdhci_dove_probe,
+	.remove		= sdhci_pltfm_unregister,
+};
+
+module_platform_driver(sdhci_dove_driver);
+
+MODULE_DESCRIPTION("SDHCI driver for Dove");
+MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
+	      "Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL v2");