Support xHCI host driver used on Panasonic UniPhier platform.
Signed-off-by: Masahiro Yamada <yamad...@jp.panasonic.com>
---
Hi Marek,
I want apply this patch onto u-boot-uniphier/master
to avoid conflicts.
If you are OK with it, could you issue your Acked-by tag, please?
Thanks,
Masahiro
doc/README.uniphier | 3 +-
drivers/usb/host/Kconfig | 8 ++++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/xhci-uniphier.c | 85 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 96 insertions(+), 1 deletion(-)
create mode 100644 drivers/usb/host/xhci-uniphier.c
diff --git a/doc/README.uniphier b/doc/README.uniphier
index aaeb50c..4902533 100644
--- a/doc/README.uniphier
+++ b/doc/README.uniphier
@@ -73,7 +73,8 @@ Supported devices
- UART (on-chip)
- NAND
- - USB (2.0)
+ - USB 2.0 (EHCI)
+ - USB 3.0 (xHCI)
- LAN (on-board SMSC9118)
- I2C
- EEPROM (connected to the on-board I2C bus)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 0e005c2..24a595f 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -17,6 +17,14 @@ config USB_XHCI
if USB_XHCI_HCD
+config USB_XHCI_UNIPHIER
+ bool "Support for Panasonic UniPhier on-chip xHCI USB controller"
+ depends on ARCH_UNIPHIER
+ default y
+ ---help---
+ Enables support for the on-chip xHCI controller on Panasonic
+ UniPhier SoCs.
+
endif
config USB_EHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 66d6e9a..eb6f34b 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
+obj-$(CONFIG_USB_XHCI_UNIPHIER) += xhci-uniphier.o
# designware
obj-$(CONFIG_USB_DWC2) += dwc2.o
diff --git a/drivers/usb/host/xhci-uniphier.c b/drivers/usb/host/xhci-uniphier.c
new file mode 100644
index 0000000..9bbd65f
--- /dev/null
+++ b/drivers/usb/host/xhci-uniphier.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2015 Panasonic Corporation
+ * Author: Masahiro Yamada <yamad...@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <usb.h>
+#include <fdtdec.h>
+#include "xhci.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define FDT gd->fdt_blob
+#define COMPAT "panasonic,uniphier-xhci"
+
+static int get_uniphier_xhci_base(int index, struct xhci_hccr **base)
+{
+ int offset;
+
+ for (offset = fdt_node_offset_by_compatible(FDT, 0, COMPAT);
+ offset >= 0;
+ offset = fdt_node_offset_by_compatible(FDT, offset, COMPAT)) {
+ if (index == 0) {
+ *base = (struct xhci_hccr *)
+ fdtdec_get_addr(FDT, offset, "reg");
+ return 0;
+ }
+ index--;
+ }
+
+ return -ENODEV; /* not found */
+}
+
+#define USB3_RST_CTRL 0x00100040
+#define IOMMU_RST_N (1 << 5)
+#define LINK_RST_N (1 << 4)
+
+static void uniphier_xhci_reset(void __iomem *base, int on)
+{
+ u32 tmp;
+
+ tmp = readl(base + USB3_RST_CTRL);
+
+ if (on)
+ tmp &= ~(IOMMU_RST_N | LINK_RST_N);
+ else
+ tmp |= IOMMU_RST_N | LINK_RST_N;
+
+ writel(tmp, base + USB3_RST_CTRL);
+}
+
+int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
+{
+ int ret;
+ struct xhci_hccr *cr;
+ struct xhci_hcor *or;
+
+ ret = get_uniphier_xhci_base(index, &cr);
+ if (ret < 0)
+ return ret;
+
+ uniphier_xhci_reset(cr, 0);
+
+ or = (void *)cr + HC_LENGTH(xhci_readl(&cr->cr_capbase));
+
+ *hccr = cr;
+ *hcor = or;
+
+ return 0;
+}
+
+void xhci_hcd_stop(int index)
+{
+ int ret;
+ struct xhci_hccr *cr;
+
+ ret = get_uniphier_xhci_base(index, &cr);
+ if (ret < 0)
+ return;
+
+ uniphier_xhci_reset(cr, 1);
+}
--
1.9.1
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