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.
11 #include <asm-generic/io.h>
13 #include <dm/device-internal.h>
15 #include <dwc3-uboot.h>
16 #include <linux/usb/ch9.h>
17 #include <linux/usb/gadget.h>
25 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
26 struct dwc3_generic_peripheral {
33 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
35 struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
36 struct dwc3 *dwc3 = &priv->dwc3;
38 dwc3_gadget_uboot_handle_interrupt(dwc3);
43 static int dwc3_generic_peripheral_probe(struct udevice *dev)
46 struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
47 struct dwc3 *dwc3 = &priv->dwc3;
49 rc = dwc3_setup_phy(dev, &priv->phys, &priv->num_phys);
53 dwc3->regs = map_physmem(priv->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
54 dwc3->regs += DWC3_GLOBALS_REGS_START;
59 unmap_physmem(dwc3->regs, MAP_NOCACHE);
66 static int dwc3_generic_peripheral_remove(struct udevice *dev)
68 struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
69 struct dwc3 *dwc3 = &priv->dwc3;
72 dwc3_shutdown_phy(dev, priv->phys, priv->num_phys);
73 unmap_physmem(dwc3->regs, MAP_NOCACHE);
78 static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
80 struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
81 struct dwc3 *dwc3 = &priv->dwc3;
82 int node = dev_of_offset(dev);
84 priv->base = devfdt_get_addr(dev);
86 dwc3->maximum_speed = usb_get_maximum_speed(node);
87 if (dwc3->maximum_speed == USB_SPEED_UNKNOWN) {
88 pr_err("Invalid usb maximum speed\n");
92 dwc3->dr_mode = usb_get_dr_mode(node);
93 if (dwc3->dr_mode == USB_DR_MODE_UNKNOWN) {
94 pr_err("Invalid usb mode setup\n");
101 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
102 .name = "dwc3-generic-peripheral",
103 .id = UCLASS_USB_GADGET_GENERIC,
104 .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
105 .probe = dwc3_generic_peripheral_probe,
106 .remove = dwc3_generic_peripheral_remove,
107 .priv_auto_alloc_size = sizeof(struct dwc3_generic_peripheral),
111 struct dwc3_glue_data {
112 struct clk_bulk clks;
113 struct reset_ctl_bulk resets;
117 struct dwc3_glue_ops {
118 void (*select_dr_mode)(struct udevice *dev, int index,
119 enum usb_dr_mode mode);
122 void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
123 enum usb_dr_mode mode)
125 #define USBOTGSS_UTMI_OTG_STATUS 0x0084
126 #define USBOTGSS_UTMI_OTG_OFFSET 0x0480
128 /* UTMI_OTG_STATUS REGISTER */
129 #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE BIT(31)
130 #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT BIT(9)
131 #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
132 #define USBOTGSS_UTMI_OTG_STATUS_IDDIG BIT(4)
133 #define USBOTGSS_UTMI_OTG_STATUS_SESSEND BIT(3)
134 #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID BIT(2)
135 #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID BIT(1)
136 enum dwc3_omap_utmi_mode {
137 DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
138 DWC3_OMAP_UTMI_MODE_HW,
139 DWC3_OMAP_UTMI_MODE_SW,
146 u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;
148 struct dwc3_glue_data *glue = dev_get_platdata(dev);
149 void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);
151 if (device_is_compatible(dev, "ti,am437x-dwc3"))
152 utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;
154 utmi_mode = dev_read_u32_default(dev, "utmi-mode",
155 DWC3_OMAP_UTMI_MODE_UNKNOWN);
156 if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
157 debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
159 mode = USB_DR_MODE_PERIPHERAL;
163 case USB_DR_MODE_PERIPHERAL:
167 case USB_DR_MODE_HOST:
171 case USB_DR_MODE_OTG:
178 reg = readl(base + utmi_status_offset);
180 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
182 reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
184 writel(reg, base + utmi_status_offset);
186 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
187 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
188 USBOTGSS_UTMI_OTG_STATUS_IDDIG);
190 reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
191 USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
194 reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
195 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;
197 writel(reg, base + utmi_status_offset);
199 unmap_physmem(base, MAP_NOCACHE);
202 struct dwc3_glue_ops ti_ops = {
203 .select_dr_mode = dwc3_ti_select_dr_mode,
206 static int dwc3_glue_bind(struct udevice *parent)
208 const void *fdt = gd->fdt_blob;
212 for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
213 node = fdt_next_subnode(fdt, node)) {
214 const char *name = fdt_get_name(fdt, node, NULL);
215 enum usb_dr_mode dr_mode;
217 const char *driver = NULL;
219 debug("%s: subnode name: %s\n", __func__, name);
221 dr_mode = usb_get_dr_mode(node);
224 case USB_DR_MODE_PERIPHERAL:
225 case USB_DR_MODE_OTG:
226 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
227 debug("%s: dr_mode: OTG or Peripheral\n", __func__);
228 driver = "dwc3-generic-peripheral";
231 case USB_DR_MODE_HOST:
232 debug("%s: dr_mode: HOST\n", __func__);
233 driver = "xhci-dwc3";
236 debug("%s: unsupported dr_mode\n", __func__);
243 ret = device_bind_driver_to_node(parent, driver, name,
244 offset_to_ofnode(node), &dev);
246 debug("%s: not able to bind usb device mode\n",
255 static int dwc3_glue_reset_init(struct udevice *dev,
256 struct dwc3_glue_data *glue)
260 ret = reset_get_bulk(dev, &glue->resets);
261 if (ret == -ENOTSUPP)
266 ret = reset_deassert_bulk(&glue->resets);
268 reset_release_bulk(&glue->resets);
275 static int dwc3_glue_clk_init(struct udevice *dev,
276 struct dwc3_glue_data *glue)
280 ret = clk_get_bulk(dev, &glue->clks);
286 #if CONFIG_IS_ENABLED(CLK)
287 ret = clk_enable_bulk(&glue->clks);
289 clk_release_bulk(&glue->clks);
297 static int dwc3_glue_probe(struct udevice *dev)
299 struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
300 struct dwc3_glue_data *glue = dev_get_platdata(dev);
301 struct udevice *child = NULL;
305 glue->regs = dev_read_addr(dev);
307 ret = dwc3_glue_clk_init(dev, glue);
311 ret = dwc3_glue_reset_init(dev, glue);
315 ret = device_find_first_child(dev, &child);
320 enum usb_dr_mode dr_mode;
322 dr_mode = usb_get_dr_mode(dev_of_offset(child));
323 device_find_next_child(&child);
324 if (ops && ops->select_dr_mode)
325 ops->select_dr_mode(dev, index, dr_mode);
332 static int dwc3_glue_remove(struct udevice *dev)
334 struct dwc3_glue_data *glue = dev_get_platdata(dev);
336 reset_release_bulk(&glue->resets);
338 clk_release_bulk(&glue->clks);
343 static const struct udevice_id dwc3_glue_ids[] = {
344 { .compatible = "xlnx,zynqmp-dwc3" },
345 { .compatible = "ti,keystone-dwc3"},
346 { .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
347 { .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops },
351 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
352 .name = "dwc3-generic-wrapper",
354 .of_match = dwc3_glue_ids,
355 .bind = dwc3_glue_bind,
356 .probe = dwc3_glue_probe,
357 .remove = dwc3_glue_remove,
358 .platdata_auto_alloc_size = sizeof(struct dwc3_glue_data),