[U-Boot] [PATCH v3 1/7] usb: xhci-rockchip: add rockchip dwc3 controller driver
Kever Yang
kever.yang at rock-chips.com
Wed Aug 24 06:02:17 CEST 2016
From: MengDongyang <daniel.meng at rock-chips.com>
This patch add support for rockchip dwc3 controller, which corresponding
to the two type-C port on rk3399 evb.
Only support usb2.0 currently for we have not enable the usb3.0 phy
driver and PD(fusb302) driver.
Signed-off-by: MengDongyang <daniel.meng at rock-chips.com>
Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---
Changes in v3:
- using fdtdec_get_bool and fdtdec_get_int instead of fdt_get_property
- other update by follow comments from Marek and Simon
Changes in v2:
- update for comments from Marek
drivers/usb/host/Makefile | 1 +
drivers/usb/host/xhci-rockchip.c | 211 +++++++++++++++++++++++++++++++++++++++
include/linux/usb/dwc3.h | 14 +++
3 files changed, 226 insertions(+)
create mode 100644 drivers/usb/host/xhci-rockchip.c
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 620d114..fdefcf6 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_XHCI_ROCKCHIP) += xhci-rockchip.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/xhci-rockchip.c b/drivers/usb/host/xhci-rockchip.c
new file mode 100644
index 0000000..561bf86
--- /dev/null
+++ b/drivers/usb/host/xhci-rockchip.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2016 Rockchip, Inc.
+ * Authors: Daniel Meng <daniel.meng at rock-chips.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <usb.h>
+#include <watchdog.h>
+#include <asm/gpio.h>
+#include <asm-generic/errno.h>
+#include <linux/compat.h>
+#include <linux/usb/dwc3.h>
+
+#include "xhci.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct rockchip_xhci_platdata {
+ fdt_addr_t hcd_base;
+ fdt_addr_t phy_base;
+ struct gpio_desc vbus_gpio;
+};
+
+/*
+ * Contains pointers to register base addresses
+ * for the usb controller.
+ */
+struct rockchip_xhci {
+ struct usb_platdata usb_plat;
+ struct xhci_ctrl ctrl;
+ struct xhci_hccr *hcd;
+ struct dwc3 *dwc3_reg;
+};
+
+static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
+{
+ struct rockchip_xhci_platdata *plat = dev_get_platdata(dev);
+ struct udevice *child;
+ int ret = 0;
+
+ /*
+ * Get the base address for XHCI controller from the device node
+ */
+ plat->hcd_base = dev_get_addr(dev);
+ if (plat->hcd_base == FDT_ADDR_T_NONE) {
+ debug("Can't get the XHCI register base address\n");
+ return -ENXIO;
+ }
+
+ /* Get the base address for usbphy from the device node */
+ for (device_find_first_child(dev, &child); child;
+ device_find_next_child(&child)) {
+ if (!of_device_is_compatible(child, "rockchip,rk3399-usb3-phy"))
+ continue;
+ plat->phy_base = dev_get_addr(child);
+ break;
+ }
+
+ if (plat->phy_base == FDT_ADDR_T_NONE) {
+ debug("Can't get the usbphy register address\n");
+ return -ENXIO;
+ }
+
+ /* Vbus gpio */
+ ret = gpio_request_by_name(dev, "rockchip,vbus-gpio", 0,
+ &plat->vbus_gpio, GPIOD_IS_OUT);
+ if (ret)
+ debug("rockchip,vbus-gpio node missing!");
+
+ return 0;
+}
+
+/*
+ * rockchip_dwc3_phy_setup() - Configure USB PHY Interface of DWC3 Core
+ * @dwc: Pointer to our controller context structure
+ * @dev: Pointer to ulcass device
+ */
+static void rockchip_dwc3_phy_setup(struct dwc3 *dwc3_reg,
+ struct udevice *dev)
+{
+ u32 reg;
+ const void *blob = gd->fdt_blob;
+ u32 utmi_bits;
+
+ /* Set dwc3 usb2 phy config */
+ reg = readl(&dwc3_reg->g_usb2phycfg[0]);
+
+ if (fdtdec_get_bool(blob, dev->of_offset,
+ "snps,dis-enblslpm-quirk"))
+ reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+
+ utmi_bits = fdtdec_get_int(blob, dev->of_offset,
+ "snps,phyif-utmi-bits", -1);
+ if (utmi_bits == 16) {
+ reg |= DWC3_GUSB2PHYCFG_PHYIF;
+ reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
+ reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
+ } else if (utmi_bits == 8) {
+ reg &= ~DWC3_GUSB2PHYCFG_PHYIF;
+ reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
+ reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_8BIT;
+ }
+
+ if (fdtdec_get_bool(blob, dev->of_offset,
+ "snps,dis-u2-freeclk-exists-quirk"))
+ reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
+
+ if (fdtdec_get_bool(blob, dev->of_offset,
+ "snps,dis-u2-susphy-quirk"))
+ reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+
+ writel(reg, &dwc3_reg->g_usb2phycfg[0]);
+}
+
+static int rockchip_xhci_core_init(struct rockchip_xhci *rkxhci,
+ struct udevice *dev)
+{
+ int ret;
+
+ ret = dwc3_core_init(rkxhci->dwc3_reg);
+ if (ret) {
+ debug("failed to initialize core\n");
+ return ret;
+ }
+
+ rockchip_dwc3_phy_setup(rkxhci->dwc3_reg, dev);
+
+ /* We are hard-coding DWC3 core to Host Mode */
+ dwc3_set_mode(rkxhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+ return 0;
+}
+
+static int rockchip_xhci_core_exit(struct rockchip_xhci *rkxhci)
+{
+ return 0;
+}
+
+static int xhci_usb_probe(struct udevice *dev)
+{
+ struct rockchip_xhci_platdata *plat = dev_get_platdata(dev);
+ struct rockchip_xhci *ctx = dev_get_priv(dev);
+ struct xhci_hcor *hcor;
+ int ret;
+
+ ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
+ ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
+ hcor = (struct xhci_hcor *)((uint64_t)ctx->hcd +
+ HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)));
+
+ /* setup the Vbus gpio here */
+ if (dm_gpio_is_valid(&plat->vbus_gpio))
+ dm_gpio_set_value(&plat->vbus_gpio, 1);
+
+ ret = rockchip_xhci_core_init(ctx, dev);
+ if (ret) {
+ debug("XHCI: failed to initialize controller\n");
+ return ret;
+ }
+
+ return xhci_register(dev, ctx->hcd, hcor);
+}
+
+static int xhci_usb_remove(struct udevice *dev)
+{
+ struct rockchip_xhci *ctx = dev_get_priv(dev);
+ int ret;
+
+ ret = xhci_deregister(dev);
+ if (ret)
+ return ret;
+ ret = rockchip_xhci_core_exit(ctx);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct udevice_id xhci_usb_ids[] = {
+ { .compatible = "rockchip,rk3399-xhci" },
+ { }
+};
+
+U_BOOT_DRIVER(usb_xhci) = {
+ .name = "xhci_rockchip",
+ .id = UCLASS_USB,
+ .of_match = xhci_usb_ids,
+ .ofdata_to_platdata = xhci_usb_ofdata_to_platdata,
+ .probe = xhci_usb_probe,
+ .remove = xhci_usb_remove,
+ .ops = &xhci_usb_ops,
+ .bind = dm_scan_fdt_dev,
+ .platdata_auto_alloc_size = sizeof(struct rockchip_xhci_platdata),
+ .priv_auto_alloc_size = sizeof(struct rockchip_xhci),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
+
+static const struct udevice_id usb_phy_ids[] = {
+ { .compatible = "rockchip,rk3399-usb3-phy" },
+ { }
+};
+
+U_BOOT_DRIVER(usb_phy) = {
+ .name = "usb_phy_rockchip",
+ .of_match = usb_phy_ids,
+};
diff --git a/include/linux/usb/dwc3.h b/include/linux/usb/dwc3.h
index 6d1e365..a027446 100644
--- a/include/linux/usb/dwc3.h
+++ b/include/linux/usb/dwc3.h
@@ -180,7 +180,21 @@ struct dwc3 { /* offset: 0xC100 */
/* Global USB2 PHY Configuration Register */
#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31)
+#define DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS (1 << 30)
+#define DWC3_GUSB2PHYCFG_ENBLSLPM (1 << 8)
#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6)
+#define DWC3_GUSB2PHYCFG_PHYIF (1 << 3)
+
+/* Global USB2 PHY Configuration Mask */
+#define DWC3_GUSB2PHYCFG_USBTRDTIM_MASK (0xf << 10)
+
+/* Global USB2 PHY Configuration Offset */
+#define DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET 10
+
+#define DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT (0x5 << \
+ DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET)
+#define DWC3_GUSB2PHYCFG_USBTRDTIM_8BIT (0x9 << \
+ DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET)
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
--
1.9.1
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