By enabling BLK by default this is the next driver which needs to get support for DM_USB. Adding generic DWC3 glue logic which only parse nodes and read device mode. Based on it probe proper host/peripheral DWC3 drivers for it.
Signed-off-by: Michal Simek michal.simek@xilinx.com ---
Changes in v2: - Change style to avoid correct but not nice indentation by using char *driver variable (suggested by Marek)
drivers/usb/dwc3/Kconfig | 6 ++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-generic.c | 157 ++++++++++++++++++++++++++++++++ 3 files changed, 164 insertions(+) create mode 100644 drivers/usb/dwc3/dwc3-generic.c
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index ae7fc1c6304d..943b7630eba4 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -37,6 +37,12 @@ config USB_DWC3_OMAP
Say 'Y' here if you have one such device
+config USB_DWC3_GENERIC + bool "Xilinx ZynqMP and similar Platforms" + depends on DM_USB && USB_DWC3 + help + Some platforms can reuse this DWC3 generic implementation. + config USB_DWC3_UNIPHIER bool "DesignWare USB3 Host Support on UniPhier Platforms" depends on ARCH_UNIPHIER && USB_XHCI_DWC3 diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index cd18b8d9ec02..60b5515a67da 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -7,6 +7,7 @@ dwc3-y := core.o obj-$(CONFIG_USB_DWC3_GADGET) += gadget.o ep0.o
obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o +obj-$(CONFIG_USB_DWC3_GENERIC) += dwc3-generic.o obj-$(CONFIG_USB_DWC3_UNIPHIER) += dwc3-uniphier.o obj-$(CONFIG_USB_DWC3_PHY_OMAP) += ti_usb_phy.o obj-$(CONFIG_USB_DWC3_PHY_SAMSUNG) += samsung_usb_phy.o diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c new file mode 100644 index 000000000000..ca63eac3d98e --- /dev/null +++ b/drivers/usb/dwc3/dwc3-generic.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Generic DWC3 Glue layer + * + * Copyright (C) 2016 - 2018 Xilinx, Inc. + * + * Based on dwc3-omap.c. + */ + +#include <common.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <linux/usb/otg.h> +#include <linux/compat.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <malloc.h> +#include <usb.h> +#include "core.h" +#include "gadget.h" +#include "linux-compat.h" + +DECLARE_GLOBAL_DATA_PTR; + +int usb_gadget_handle_interrupts(int index) +{ + struct dwc3 *priv; + struct udevice *dev; + int ret; + + ret = uclass_first_device(UCLASS_USB_DEV_GENERIC, &dev); + if (!dev || ret) { + pr_err("No USB device found\n"); + return -ENODEV; + } + + priv = dev_get_priv(dev); + + dwc3_gadget_uboot_handle_interrupt(priv); + + return 0; +} + +static int dwc3_generic_peripheral_probe(struct udevice *dev) +{ + struct dwc3 *priv = dev_get_priv(dev); + + return dwc3_init(priv); +} + +static int dwc3_generic_peripheral_remove(struct udevice *dev) +{ + struct dwc3 *priv = dev_get_priv(dev); + + dwc3_remove(priv); + + return 0; +} + +static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev) +{ + struct dwc3 *priv = dev_get_priv(dev); + int node = dev_of_offset(dev); + + priv->regs = (void *)devfdt_get_addr(dev); + priv->regs += DWC3_GLOBALS_REGS_START; + + priv->maximum_speed = usb_get_maximum_speed(node); + if (priv->maximum_speed == USB_SPEED_UNKNOWN) { + pr_err("Invalid usb maximum speed\n"); + return -ENODEV; + } + + priv->dr_mode = usb_get_dr_mode(node); + if (priv->dr_mode == USB_DR_MODE_UNKNOWN) { + pr_err("Invalid usb mode setup\n"); + return -ENODEV; + } + + return 0; +} + +static int dwc3_generic_peripheral_bind(struct udevice *dev) +{ + return device_probe(dev); +} + +U_BOOT_DRIVER(dwc3_generic_peripheral) = { + .name = "dwc3-generic-peripheral", + .id = UCLASS_USB_DEV_GENERIC, + .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata, + .probe = dwc3_generic_peripheral_probe, + .remove = dwc3_generic_peripheral_remove, + .bind = dwc3_generic_peripheral_bind, + .platdata_auto_alloc_size = sizeof(struct usb_platdata), + .priv_auto_alloc_size = sizeof(struct dwc3), + .flags = DM_FLAG_ALLOC_PRIV_DMA, +}; + +static int dwc3_generic_bind(struct udevice *parent) +{ + const void *fdt = gd->fdt_blob; + int node; + int ret; + + for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0; + node = fdt_next_subnode(fdt, node)) { + const char *name = fdt_get_name(fdt, node, NULL); + enum usb_dr_mode dr_mode; + struct udevice *dev; + const char *driver; + + debug("%s: subnode name: %s\n", __func__, name); + if (strncmp(name, "dwc3@", 4)) + continue; + + dr_mode = usb_get_dr_mode(node); + + switch (dr_mode) { + case USB_DR_MODE_PERIPHERAL: + case USB_DR_MODE_OTG: + debug("%s: dr_mode: OTG or Peripheral\n", __func__); + driver = "dwc3-generic-peripheral"; + break; + case USB_DR_MODE_HOST: + debug("%s: dr_mode: HOST\n", __func__); + driver = "dwc3-generic-host"; + break; + default: + debug("%s: unsupported dr_mode\n", __func__); + return -ENODEV; + }; + + ret = device_bind_driver_to_node(parent, driver, name, + offset_to_ofnode(node), &dev); + if (ret) { + debug("%s: not able to bind usb device mode\n", + __func__); + return ret; + } + } + + return 0; +} + +static const struct udevice_id dwc3_generic_ids[] = { + { .compatible = "xlnx,zynqmp-dwc3" }, + { } +}; + +U_BOOT_DRIVER(dwc3_generic_wrapper) = { + .name = "dwc3-generic-wrapper", + .id = UCLASS_MISC, + .of_match = dwc3_generic_ids, + .bind = dwc3_generic_bind, +};