Hi Simon,

On 08/22/2016 12:20 PM, Simon Glass wrote:
Hi Kever,

On 19 August 2016 at 01:19, Kever Yang <kever.y...@rock-chips.com> wrote:
From: MengDongyang <daniel.m...@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.m...@rock-chips.com>
Signed-off-by: Kever Yang <kever.y...@rock-chips.com>
---

Changes in v2:
- update for comments from Marek

  drivers/usb/host/Makefile        |   1 +
  drivers/usb/host/xhci-rockchip.c | 227 +++++++++++++++++++++++++++++++++++++++
  include/linux/usb/dwc3.h         |   9 ++
  3 files changed, 237 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..baf6b6e
--- /dev/null
+++ b/drivers/usb/host/xhci-rockchip.c
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2016 Rockchip, Inc.
+ * Authors: Daniel Meng <daniel.m...@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;
+       struct udevice *dev;
What is dev used for? Can you please add a comment?

This dev is used for get the fdt from dev when do phy setup, but I think this
can be removed.


+};
+
+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
+        */
/* Get the base address ... */

Will fix in next version.

+       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
* rockchip_dwc3_phy_setup() - Configure

Will fix in next version.

+ * @dwc: Pointer to our controller context structure
+ * @rockchip_xhci: Pointer to dev private data
+ */
+static void rockchip_dwc3_phy_setup(struct dwc3 *dwc3_reg,
+                                   struct rockchip_xhci *rockchip)
+{
+       u32 reg;
+       const void *blob = gd->fdt_blob;
+       struct udevice *dev = rockchip->dev;
+       const struct fdt_property *prop;
+       const u32 *data;
+
+       reg = readl(&dwc3_reg->g_usb3pipectl[0]);
+
+       /* To do set dwc3 usb3 pipe control */
Is this a TODO? If so:

    TODO(email): ...

Will remove in next version.


+
+       writel(reg, &dwc3_reg->g_usb3pipectl[0]);
+
+       /* Set dwc3 usb2 phy config */
please drop this blank line

Will fix in next version.
+
+       reg = readl(&dwc3_reg->g_usb2phycfg[0]);
+
+       prop = fdt_get_property(blob, dev->of_offset,
+                               "snps,dis-enblslpm-quirk", NULL);
Can you do:

if (fdtdec_get_bool(blob, dev->of_offset, "snps,dis-enblslpm-quirk")
                reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;

Will follow you suggestion in next version.


+       if (prop)
+               reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+
+       prop = fdt_get_property(blob, dev->of_offset,
+                               "snps,phyif-utmi-bits", NULL);
I think you want fdtdec_get_int() here. It does the endianness
conversion for you.

Will fix in next version.

+       data = (u32 *)prop->data;
+       if (fdt32_to_cpu(*data) == 16) {
+               reg |= DWC3_GUSB2PHYCFG_PHYIF;
+               reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
+               reg |= 5 << DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET;
What is 5 for? Please add a comment.

Will fix in next version.

+       } else if (fdt32_to_cpu(*data) == 8) {
+               reg &= ~DWC3_GUSB2PHYCFG_PHYIF;
+               reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
+               reg |= 9 << DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET;
What is 9 for?

Will fix in next version.

+       }
+
+       prop = fdt_get_property(blob, dev->of_offset,
+                               "snps,dis-u2-freeclk-exists-quirk", NULL);
fdtdec_get_bool

Will fix in next version.

+       if (prop)
+               reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
+
+       prop = fdt_get_property(blob, dev->of_offset,
+                               "snps,dis-u2-susphy-quirk", NULL);
fdtdec_get_bool

Will fix in next version.

+       if (prop)
+               reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+
+       writel(reg, &dwc3_reg->g_usb2phycfg[0]);
+}
+
+static int rockchip_xhci_core_init(struct rockchip_xhci *rockchip)
+{
+       int ret;
+
+       ret = dwc3_core_init(rockchip->dwc3_reg);
+       if (ret) {
+               debug("failed to initialize core\n");
+               return -EINVAL;
return ret

Will fix in next version.

+       }
+
+       rockchip_dwc3_phy_setup(rockchip->dwc3_reg, rockchip);
+
+       /* We are hard-coding DWC3 core to Host Mode */
+       dwc3_set_mode(rockchip->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+       return 0;
+}
+
+static int rockchip_xhci_core_exit(struct rockchip_xhci *rockchip)
+{
+       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);
+       ctx->dev = dev;
+       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);
+       if (ret) {
+               puts("XHCI: failed to initialize controller\n");
debug()

Will fix in next version.

+               return -EINVAL;
return ret

Will fix in next version.

Thanks,
- Kever

+       }
+
+       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..b1e3d0a 100644
--- a/include/linux/usb/dwc3.h
+++ b/include/linux/usb/dwc3.h
@@ -180,7 +180,16 @@ 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

  /* Global USB3 PIPE Control Register */
  #define DWC3_GUSB3PIPECTL_PHYSOFTRST           (1 << 31)
--
1.9.1

Regards,
Simon





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