RZ/V2M is similar to R-Car XHCI but it doesn't require any
firmware, we need to reset the USB Host reset release in DRD Module
before accessing host registers.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
drivers/usb/host/Kconfig | 9 +++++++++
drivers/usb/host/Makefile | 3 +++
drivers/usb/host/xhci-plat.c | 11 ++++++++++
drivers/usb/host/xhci-rzv2m.c | 38 +++++++++++++++++++++++++++++++++++
drivers/usb/host/xhci-rzv2m.h | 16 +++++++++++++++
5 files changed, 77 insertions(+)
create mode 100644 drivers/usb/host/xhci-rzv2m.c
create mode 100644 drivers/usb/host/xhci-rzv2m.h
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 247568bc17a2..4d347b9c9e45 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -95,6 +95,15 @@ config USB_XHCI_RCAR
Say 'Y' to enable the support for the xHCI host controller
found in Renesas R-Car ARM SoCs.
+config USB_XHCI_RZV2M
+ tristate "xHCI support for Renesas RZ/V2M SoC"
+ depends on USB_XHCI_PLATFORM
+ depends on ARCH_R9A09G011 || COMPILE_TEST
+ select USB_RZV2M_USB3DRD
+ help
+ Say 'Y' to enable the support for the xHCI host controller
+ found in Renesas RZ/V2M SoC.
+
config USB_XHCI_TEGRA
tristate "xHCI support for NVIDIA Tegra SoCs"
depends on PHY_TEGRA_XUSB
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 2c8a61be7e46..a0c5e48f6a76 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -28,6 +28,9 @@ endif
ifneq ($(CONFIG_USB_XHCI_RCAR), )
xhci-plat-hcd-y += xhci-rcar.o
endif
+ifneq ($(CONFIG_USB_XHCI_RZV2M), )
+ xhci-plat-hcd-y += xhci-rzv2m.o
+endif
ifneq ($(CONFIG_DEBUG_FS),)
xhci-hcd-y += xhci-debugfs.o
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c5fc175a5fd1..57269f1f318e 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -25,6 +25,7 @@
#include "xhci-plat.h"
#include "xhci-mvebu.h"
#include "xhci-rcar.h"
+#include "xhci-rzv2m.h"
static struct hc_driver __read_mostly xhci_plat_hc_driver;
@@ -123,6 +124,13 @@ static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3)
};
+static const struct xhci_plat_priv xhci_plat_renesas_rzv2m = {
+ .quirks = XHCI_NO_64BIT_SUPPORT | XHCI_TRUST_TX_LENGTH |
+ XHCI_SLOW_SUSPEND,
+ .init_quirk = xhci_rzv2m_init_quirk,
+ .plat_start = xhci_rzv2m_start,
+};
+
static const struct xhci_plat_priv xhci_plat_brcm = {
.quirks = XHCI_RESET_ON_RESUME | XHCI_SUSPEND_RESUME_CLKS,
};
@@ -162,6 +170,9 @@ static const struct of_device_id usb_xhci_of_match[] = {
}, {
.compatible = "renesas,rcar-gen3-xhci",
.data = &xhci_plat_renesas_rcar_gen3,
+ }, {
+ .compatible = "renesas,rzv2m-xhci",
+ .data = &xhci_plat_renesas_rzv2m,
}, {
.compatible = "brcm,xhci-brcm-v2",
.data = &xhci_plat_brcm,
diff --git a/drivers/usb/host/xhci-rzv2m.c b/drivers/usb/host/xhci-rzv2m.c
new file mode 100644
index 000000000000..d022b183daed
--- /dev/null
+++ b/drivers/usb/host/xhci-rzv2m.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xHCI host controller driver for RZ/V2M
+ *
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+
+#include <linux/soc/renesas/rzv2m_usb3drd.h>
+#include "xhci-plat.h"
+#include "xhci-rzv2m.h"
+
+#define RZV2M_USB3_INTEN 0x1044 /* Interrupt Enable */
+
+#define RZV2M_USB3_INT_XHC_ENA BIT(0)
+#define RZV2M_USB3_INT_HSE_ENA BIT(2)
+#define RZV2M_USB3_INT_ENA_VAL (RZV2M_USB3_INT_XHC_ENA \
+ | RZV2M_USB3_INT_HSE_ENA)
+
+int xhci_rzv2m_init_quirk(struct usb_hcd *hcd)
+{
+ struct device *dev = hcd->self.controller;
+
+ rzv2m_usb3drd_reset(dev->parent, true);
+
+ return 0;
+}
+
+void xhci_rzv2m_start(struct usb_hcd *hcd)
+{
+ u32 int_en;
+
+ if (hcd->regs) {
+ /* Interrupt Enable */
+ int_en = readl(hcd->regs + RZV2M_USB3_INTEN);
+ int_en |= RZV2M_USB3_INT_ENA_VAL;
+ writel(int_en, hcd->regs + RZV2M_USB3_INTEN);
+ }
+}
diff --git a/drivers/usb/host/xhci-rzv2m.h b/drivers/usb/host/xhci-rzv2m.h
new file mode 100644
index 000000000000..12448b0e8d5b
--- /dev/null
+++ b/drivers/usb/host/xhci-rzv2m.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __XHCI_RZV2M_H
+#define __XHCI_RZV2M_H
+
+#if IS_ENABLED(CONFIG_USB_XHCI_RZV2M)
+void xhci_rzv2m_start(struct usb_hcd *hcd);
+int xhci_rzv2m_init_quirk(struct usb_hcd *hcd);
+#else
+static inline void xhci_rzv2m_start(struct usb_hcd *hcd) {}
+static inline int xhci_rzv2m_init_quirk(struct usb_hcd *hcd)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif /* __XHCI_RZV2M_H */
--
2.25.1
