[U-Boot] [PATCH v2 06/13] usb: dwc3: add UniPhier specific glue layer

Masahiro Yamada
2016-05-16T12:51:19Z

Add UniPhier platform specific glue layer to support USB3 Host mode
on Synopsys DWC3 IP.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Marek Vasut <marex@denx.de>
---

Changes in v2:
- Fix build error
- Add missing PHY reset deassert

drivers/usb/host/Kconfig | 7 +++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/dwc3-uniphier.c | 119 +++++++++++++++++++++++++++++++++++++++
3 files changed, 127 insertions(+)
create mode 100644 drivers/usb/host/dwc3-uniphier.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 89580cc..a6645dd 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -24,6 +24,13 @@ config USB_XHCI_DWC3
Say Y or if your system has a Dual Role SuperSpeed
USB controller based on the DesignWare USB3 IP Core.

+config USB_DWC3_UNIPHIER
+ bool "DesignWare USB3 Host Support on UniPhier Platforms"
+ depends on ARCH_UNIPHIER && USB_XHCI_DWC3
+ help
+ Support of USB2/3 functionality in Socionext UniPhier platforms.
+ Say 'Y' here if you have one such device.
+
endif

config USB_OHCI_GENERIC
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 620d114..8b54fde 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_USB_EHCI_ZYNQ) += ehci-zynq.o
# xhci
obj-$(CONFIG_USB_XHCI_HCD) += xhci.o xhci-mem.o xhci-ring.o
obj-$(CONFIG_USB_XHCI_DWC3) += xhci-dwc3.o
+obj-$(CONFIG_USB_DWC3_UNIPHIER) += dwc3-uniphier.o
obj-$(CONFIG_USB_XHCI_ZYNQMP) += xhci-zynqmp.o
obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
diff --git a/drivers/usb/host/dwc3-uniphier.c b/drivers/usb/host/dwc3-uniphier.c
new file mode 100644
index 0000000..e0358ac
--- /dev/null
+++ b/drivers/usb/host/dwc3-uniphier.c
@@ -0,0 +1,119 @@
+/*
+ * UniPhier Specific Glue Layer for DWC3
+ *
+ * Copyright (C) 2016 Socionext Inc.
+ * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <dm/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#define UNIPHIER_PRO4_DWC3_RESET 0x40
+#define UNIPHIER_PRO4_DWC3_RESET_XIOMMU BIT(5)
+#define UNIPHIER_PRO4_DWC3_RESET_XLINK BIT(4)
+#define UNIPHIER_PRO4_DWC3_RESET_PHY_SS BIT(2)
+
+#define UNIPHIER_PRO5_DWC3_RESET 0x00
+#define UNIPHIER_PRO5_DWC3_RESET_PHY_S1 BIT(17)
+#define UNIPHIER_PRO5_DWC3_RESET_PHY_S0 BIT(16)
+#define UNIPHIER_PRO5_DWC3_RESET_XLINK BIT(15)
+#define UNIPHIER_PRO5_DWC3_RESET_XIOMMU BIT(14)
+
+#define UNIPHIER_PXS2_DWC3_RESET 0x00
+#define UNIPHIER_PXS2_DWC3_RESET_XLINK BIT(15)
+
+static int uniphier_pro4_dwc3_init(void __iomem *regs)
+{
+ u32 tmp;
+
+ tmp = readl(regs + UNIPHIER_PRO4_DWC3_RESET);
+ tmp &= ~UNIPHIER_PRO4_DWC3_RESET_PHY_SS;
+ tmp |= UNIPHIER_PRO4_DWC3_RESET_XIOMMU | UNIPHIER_PRO4_DWC3_RESET_XLINK;
+ writel(tmp, regs + UNIPHIER_PRO4_DWC3_RESET);
+
+ return 0;
+}
+
+static int uniphier_pro5_dwc3_init(void __iomem *regs)
+{
+ u32 tmp;
+
+ tmp = readl(regs + UNIPHIER_PRO5_DWC3_RESET);
+ tmp &= ~(UNIPHIER_PRO5_DWC3_RESET_PHY_S1 |
+ UNIPHIER_PRO5_DWC3_RESET_PHY_S0);
+ tmp |= UNIPHIER_PRO5_DWC3_RESET_XLINK | UNIPHIER_PRO5_DWC3_RESET_XIOMMU;
+ writel(tmp, regs + UNIPHIER_PRO5_DWC3_RESET);
+
+ return 0;
+}
+
+static int uniphier_pxs2_dwc3_init(void __iomem *regs)
+{
+ u32 tmp;
+
+ tmp = readl(regs + UNIPHIER_PXS2_DWC3_RESET);
+ tmp |= UNIPHIER_PXS2_DWC3_RESET_XLINK;
+ writel(tmp, regs + UNIPHIER_PXS2_DWC3_RESET);
+
+ return 0;
+}
+
+static int uniphier_dwc3_probe(struct udevice *dev)
+{
+ fdt_addr_t base;
+ void __iomem *regs;
+ int (*init)(void __iomem *regs);
+ int ret;
+
+ base = dev_get_addr(dev);
+ if (base == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ regs = map_sysmem(base, SZ_32K);
+ if (!regs)
+ return -ENOMEM;
+
+ init = (int (*)(void __iomem *regs))dev_get_driver_data(dev);
+ ret = init(regs);
+ if (ret) {
+ dev_err(dev, "failed to init glue layer\n");
+ return ret;
+ }
+
+ unmap_sysmem(regs);
+
+ return 0;
+}
+
+static const struct udevice_id uniphier_dwc3_match[] = {
+ {
+ .compatible = "socionext,uniphier-pro4-dwc3",
+ .data = (ulong)uniphier_pro4_dwc3_init,
+ },
+ {
+ .compatible = "socionext,uniphier-pro5-dwc3",
+ .data = (ulong)uniphier_pro5_dwc3_init,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs2-dwc3",
+ .data = (ulong)uniphier_pxs2_dwc3_init,
+ },
+ {
+ .compatible = "socionext,uniphier-ld20-dwc3",
+ .data = (ulong)uniphier_pxs2_dwc3_init,
+ },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(usb_xhci) = {
+ .name = "uniphier-dwc3",
+ .id = UCLASS_SIMPLE_BUS,
+ .of_match = uniphier_dwc3_match,
+ .probe = uniphier_dwc3_probe,
+};
--
1.9.1