git: 89e650eacc9b - main - sdhci: Add driver for the cvitek sdhci controller

The branch main has been updated by bnovkov:

URL: https://cgit.FreeBSD.org/src/commit/?id=89e650eacc9bb3960b38d704abae06694fad08e6

commit 89e650eacc9bb3960b38d704abae06694fad08e6
Author:     Bojan Novković <bnovkov@FreeBSD.org>
AuthorDate: 2025-01-18 19:03:25 +0000
Commit:     Bojan Novković <bnovkov@FreeBSD.org>
CommitDate: 2025-08-01 12:35:54 +0000

    sdhci: Add driver for the cvitek sdhci controller
    
    This patch add support for cvitek SDHCI controller (only SD card mode).
    This controller is present on Milk-V's riscv SoCs.
    
    Reviewed by:    manu
    Differential Revision:  https://reviews.freebsd.org/D48528
---
 sys/dev/sdhci/sdhci_fdt_cvitek.c | 144 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)

diff --git a/sys/dev/sdhci/sdhci_fdt_cvitek.c b/sys/dev/sdhci/sdhci_fdt_cvitek.c
new file mode 100644
index 000000000000..e13e10df0dc2
--- /dev/null
+++ b/sys/dev/sdhci/sdhci_fdt_cvitek.c
@@ -0,0 +1,144 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 Bojan Novković <bnovkov@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/types.h>
+#include <sys/taskqueue.h>
+#include <sys/module.h>
+
+#include <machine/bus.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/ofw_subr.h>
+#include <dev/clk/clk.h>
+#include <dev/clk/clk_fixed.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/syscon/syscon.h>
+
+#include <dev/phy/phy.h>
+#include <dev/mmc/bridge.h>
+#include <dev/mmc/mmcbrvar.h>
+#include <dev/mmc/mmcreg.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/mmc/mmc_fdt_helpers.h>
+
+#include <dev/sdhci/sdhci.h>
+#include <dev/sdhci/sdhci_fdt_gpio.h>
+#include <dev/sdhci/sdhci_fdt.h>
+
+#include "syscon_if.h"
+#include "mmcbr_if.h"
+#include "sdhci_if.h"
+
+#include "opt_mmccam.h"
+#include "opt_soc.h"
+
+#define CV181X_SYSCTRL_SD_PWRSW_CTRL	0x1F4
+#define  SD_PWRSW_CTRL_RESET_MASK	0x9
+#define CVI_CV181X_SDHCI_VENDOR_OFFSET	0x200
+#define CVI_CV181X_SDHCI_EMMC_CTRL	(CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x0)
+#define  EMMC_CTRL_RESET_MASK		 0x302
+#define CVI_CV181X_SDHCI_PHY_TX_RX_DLY	(CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x40)
+#define  PHY_TX_RX_DLY_RESET_MASK	 0x1000100
+#define CVI_CV181X_SDHCI_PHY_CONFIG	(CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x4C)
+#define  PHY_CONFIG_RESET_MASK		 0x1
+
+#define	SDHCI_FDT_CVITEK_CV181X_SD	1
+
+static struct ofw_compat_data compat_data[] = {
+	{ "cvitek,cv181x-sd", SDHCI_FDT_CVITEK_CV181X_SD },
+	{ NULL, 0 }
+};
+
+static int
+sdhci_fdt_cvitek_probe(device_t dev)
+{
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+		return (ENXIO);
+
+	device_set_desc(dev, "Cvitek CV181x SDHCI controller");
+	return (BUS_PROBE_SPECIFIC);
+}
+
+static int
+sdhci_fdt_cvitek_attach(device_t dev)
+{
+	int error;
+	uint32_t reg;
+	phandle_t node;
+	struct resource *res;
+	struct syscon	*syscon;
+	struct sdhci_fdt_softc *sc = device_get_softc(dev);
+
+	if (sdhci_fdt_attach(dev))
+		return (ENXIO);
+
+	res = sc->mem_res[0];
+	node = ofw_bus_find_compatible(OF_finddevice("/"), "syscon");
+	error = syscon_get_by_ofw_node(dev, node, &syscon);
+	if (error != 0) {
+		device_printf(dev, "Couldn't get syscon handle\n");
+		return (error);
+	}
+
+	SYSCON_WRITE_4(syscon, CV181X_SYSCTRL_SD_PWRSW_CTRL,
+	    SD_PWRSW_CTRL_RESET_MASK);
+	DELAY(1000);
+
+	reg = bus_read_4(res, CVI_CV181X_SDHCI_EMMC_CTRL);
+	reg |= EMMC_CTRL_RESET_MASK;
+	bus_write_4(res, CVI_CV181X_SDHCI_EMMC_CTRL, reg);
+	bus_write_4(res, CVI_CV181X_SDHCI_PHY_TX_RX_DLY,
+	    PHY_TX_RX_DLY_RESET_MASK);
+	bus_write_4(res, CVI_CV181X_SDHCI_PHY_CONFIG,
+	    PHY_CONFIG_RESET_MASK);
+
+	return (0);
+}
+
+static device_method_t sdhci_fdt_cvitek_methods[] = {
+	/* device_if */
+	DEVMETHOD(device_probe,		sdhci_fdt_cvitek_probe),
+	DEVMETHOD(device_attach,	sdhci_fdt_cvitek_attach),
+
+	DEVMETHOD_END
+};
+extern driver_t sdhci_fdt_driver;
+
+DEFINE_CLASS_1(sdhci_cvitek, sdhci_fdt_cvitek_driver, sdhci_fdt_cvitek_methods,
+    sizeof(struct sdhci_fdt_softc), sdhci_fdt_driver);
+DRIVER_MODULE(sdhci_cvitek, simplebus, sdhci_fdt_cvitek_driver, NULL, NULL);
+
+#ifndef MMCCAM
+MMC_DECLARE_BRIDGE(sdhci_fdt_cvitek);
+#endif