1 // SPDX-License-Identifier: GPL-2.0
3 * Generic DWC3 Glue layer
5 * Copyright (C) 2016 - 2018 Xilinx, Inc.
7 * Based on dwc3-omap.c.
12 #include <dm/device-internal.h>
14 #include <linux/usb/otg.h>
15 #include <linux/compat.h>
16 #include <linux/usb/ch9.h>
17 #include <linux/usb/gadget.h>
22 #include "linux-compat.h"
24 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
25 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
27 struct dwc3 *priv = dev_get_priv(dev);
29 dwc3_gadget_uboot_handle_interrupt(priv);
34 static int dwc3_generic_peripheral_probe(struct udevice *dev)
36 struct dwc3 *priv = dev_get_priv(dev);
38 return dwc3_init(priv);
41 static int dwc3_generic_peripheral_remove(struct udevice *dev)
43 struct dwc3 *priv = dev_get_priv(dev);
50 static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
52 struct dwc3 *priv = dev_get_priv(dev);
53 int node = dev_of_offset(dev);
55 priv->regs = (void *)devfdt_get_addr(dev);
56 priv->regs += DWC3_GLOBALS_REGS_START;
58 priv->maximum_speed = usb_get_maximum_speed(node);
59 if (priv->maximum_speed == USB_SPEED_UNKNOWN) {
60 pr_err("Invalid usb maximum speed\n");
64 priv->dr_mode = usb_get_dr_mode(node);
65 if (priv->dr_mode == USB_DR_MODE_UNKNOWN) {
66 pr_err("Invalid usb mode setup\n");
73 static int dwc3_generic_peripheral_bind(struct udevice *dev)
75 return device_probe(dev);
78 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
79 .name = "dwc3-generic-peripheral",
80 .id = UCLASS_USB_DEV_GENERIC,
81 .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
82 .probe = dwc3_generic_peripheral_probe,
83 .remove = dwc3_generic_peripheral_remove,
84 .bind = dwc3_generic_peripheral_bind,
85 .platdata_auto_alloc_size = sizeof(struct usb_platdata),
86 .priv_auto_alloc_size = sizeof(struct dwc3),
87 .flags = DM_FLAG_ALLOC_PRIV_DMA,
91 static int dwc3_generic_bind(struct udevice *parent)
93 const void *fdt = gd->fdt_blob;
97 for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
98 node = fdt_next_subnode(fdt, node)) {
99 const char *name = fdt_get_name(fdt, node, NULL);
100 enum usb_dr_mode dr_mode;
104 debug("%s: subnode name: %s\n", __func__, name);
105 if (strncmp(name, "dwc3@", 4))
108 dr_mode = usb_get_dr_mode(node);
111 case USB_DR_MODE_PERIPHERAL:
112 case USB_DR_MODE_OTG:
113 debug("%s: dr_mode: OTG or Peripheral\n", __func__);
114 driver = "dwc3-generic-peripheral";
116 case USB_DR_MODE_HOST:
117 debug("%s: dr_mode: HOST\n", __func__);
118 driver = "dwc3-generic-host";
121 debug("%s: unsupported dr_mode\n", __func__);
125 ret = device_bind_driver_to_node(parent, driver, name,
126 offset_to_ofnode(node), &dev);
128 debug("%s: not able to bind usb device mode\n",
137 static const struct udevice_id dwc3_generic_ids[] = {
138 { .compatible = "xlnx,zynqmp-dwc3" },
142 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
143 .name = "dwc3-generic-wrapper",
145 .of_match = dwc3_generic_ids,
146 .bind = dwc3_generic_bind,