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 struct dwc3_generic_plat {
28 enum usb_dr_mode dr_mode;
31 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
32 struct dwc3_generic_priv {
38 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
40 struct dwc3_generic_priv *priv = dev_get_priv(dev);
41 struct dwc3 *dwc3 = &priv->dwc3;
43 dwc3_gadget_uboot_handle_interrupt(dwc3);
48 static int dwc3_generic_peripheral_probe(struct udevice *dev)
51 struct dwc3_generic_priv *priv = dev_get_priv(dev);
52 struct dwc3_generic_plat *plat = dev_get_platdata(dev);
53 struct dwc3 *dwc3 = &priv->dwc3;
55 dwc3->maximum_speed = plat->maximum_speed;
56 dwc3->dr_mode = plat->dr_mode;
58 rc = dwc3_setup_phy(dev, &priv->phys, &priv->num_phys);
62 dwc3->regs = map_physmem(plat->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
63 dwc3->regs += DWC3_GLOBALS_REGS_START;
68 unmap_physmem(dwc3->regs, MAP_NOCACHE);
75 static int dwc3_generic_peripheral_remove(struct udevice *dev)
77 struct dwc3_generic_priv *priv = dev_get_priv(dev);
78 struct dwc3 *dwc3 = &priv->dwc3;
81 dwc3_shutdown_phy(dev, priv->phys, priv->num_phys);
82 unmap_physmem(dwc3->regs, MAP_NOCACHE);
87 static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
89 struct dwc3_generic_plat *plat = dev_get_platdata(dev);
90 int node = dev_of_offset(dev);
92 plat->base = devfdt_get_addr(dev);
94 plat->maximum_speed = usb_get_maximum_speed(node);
95 if (plat->maximum_speed == USB_SPEED_UNKNOWN) {
96 pr_err("Invalid usb maximum speed\n");
100 plat->dr_mode = usb_get_dr_mode(node);
101 if (plat->dr_mode == USB_DR_MODE_UNKNOWN) {
102 pr_err("Invalid usb mode setup\n");
109 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
110 .name = "dwc3-generic-peripheral",
111 .id = UCLASS_USB_GADGET_GENERIC,
112 .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
113 .probe = dwc3_generic_peripheral_probe,
114 .remove = dwc3_generic_peripheral_remove,
115 .priv_auto_alloc_size = sizeof(struct dwc3_generic_priv),
116 .platdata_auto_alloc_size = sizeof(struct dwc3_generic_plat),
120 struct dwc3_glue_data {
121 struct clk_bulk clks;
122 struct reset_ctl_bulk resets;
126 struct dwc3_glue_ops {
127 void (*select_dr_mode)(struct udevice *dev, int index,
128 enum usb_dr_mode mode);
131 void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
132 enum usb_dr_mode mode)
134 #define USBOTGSS_UTMI_OTG_STATUS 0x0084
135 #define USBOTGSS_UTMI_OTG_OFFSET 0x0480
137 /* UTMI_OTG_STATUS REGISTER */
138 #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE BIT(31)
139 #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT BIT(9)
140 #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
141 #define USBOTGSS_UTMI_OTG_STATUS_IDDIG BIT(4)
142 #define USBOTGSS_UTMI_OTG_STATUS_SESSEND BIT(3)
143 #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID BIT(2)
144 #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID BIT(1)
145 enum dwc3_omap_utmi_mode {
146 DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
147 DWC3_OMAP_UTMI_MODE_HW,
148 DWC3_OMAP_UTMI_MODE_SW,
155 u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;
157 struct dwc3_glue_data *glue = dev_get_platdata(dev);
158 void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);
160 if (device_is_compatible(dev, "ti,am437x-dwc3"))
161 utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;
163 utmi_mode = dev_read_u32_default(dev, "utmi-mode",
164 DWC3_OMAP_UTMI_MODE_UNKNOWN);
165 if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
166 debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
168 mode = USB_DR_MODE_PERIPHERAL;
172 case USB_DR_MODE_PERIPHERAL:
176 case USB_DR_MODE_HOST:
180 case USB_DR_MODE_OTG:
187 reg = readl(base + utmi_status_offset);
189 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
191 reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
193 writel(reg, base + utmi_status_offset);
195 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
196 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
197 USBOTGSS_UTMI_OTG_STATUS_IDDIG);
199 reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
200 USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
203 reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
204 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;
206 writel(reg, base + utmi_status_offset);
208 unmap_physmem(base, MAP_NOCACHE);
211 struct dwc3_glue_ops ti_ops = {
212 .select_dr_mode = dwc3_ti_select_dr_mode,
215 static int dwc3_glue_bind(struct udevice *parent)
217 const void *fdt = gd->fdt_blob;
221 for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
222 node = fdt_next_subnode(fdt, node)) {
223 const char *name = fdt_get_name(fdt, node, NULL);
224 enum usb_dr_mode dr_mode;
226 const char *driver = NULL;
228 debug("%s: subnode name: %s\n", __func__, name);
230 dr_mode = usb_get_dr_mode(node);
233 case USB_DR_MODE_PERIPHERAL:
234 case USB_DR_MODE_OTG:
235 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
236 debug("%s: dr_mode: OTG or Peripheral\n", __func__);
237 driver = "dwc3-generic-peripheral";
240 case USB_DR_MODE_HOST:
241 debug("%s: dr_mode: HOST\n", __func__);
242 driver = "xhci-dwc3";
245 debug("%s: unsupported dr_mode\n", __func__);
252 ret = device_bind_driver_to_node(parent, driver, name,
253 offset_to_ofnode(node), &dev);
255 debug("%s: not able to bind usb device mode\n",
264 static int dwc3_glue_reset_init(struct udevice *dev,
265 struct dwc3_glue_data *glue)
269 ret = reset_get_bulk(dev, &glue->resets);
270 if (ret == -ENOTSUPP)
275 ret = reset_deassert_bulk(&glue->resets);
277 reset_release_bulk(&glue->resets);
284 static int dwc3_glue_clk_init(struct udevice *dev,
285 struct dwc3_glue_data *glue)
289 ret = clk_get_bulk(dev, &glue->clks);
295 #if CONFIG_IS_ENABLED(CLK)
296 ret = clk_enable_bulk(&glue->clks);
298 clk_release_bulk(&glue->clks);
306 static int dwc3_glue_probe(struct udevice *dev)
308 struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
309 struct dwc3_glue_data *glue = dev_get_platdata(dev);
310 struct udevice *child = NULL;
314 glue->regs = dev_read_addr(dev);
316 ret = dwc3_glue_clk_init(dev, glue);
320 ret = dwc3_glue_reset_init(dev, glue);
324 ret = device_find_first_child(dev, &child);
329 enum usb_dr_mode dr_mode;
331 dr_mode = usb_get_dr_mode(dev_of_offset(child));
332 device_find_next_child(&child);
333 if (ops && ops->select_dr_mode)
334 ops->select_dr_mode(dev, index, dr_mode);
341 static int dwc3_glue_remove(struct udevice *dev)
343 struct dwc3_glue_data *glue = dev_get_platdata(dev);
345 reset_release_bulk(&glue->resets);
347 clk_release_bulk(&glue->clks);
352 static const struct udevice_id dwc3_glue_ids[] = {
353 { .compatible = "xlnx,zynqmp-dwc3" },
354 { .compatible = "ti,keystone-dwc3"},
355 { .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
356 { .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops },
360 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
361 .name = "dwc3-generic-wrapper",
363 .of_match = dwc3_glue_ids,
364 .bind = dwc3_glue_bind,
365 .probe = dwc3_glue_probe,
366 .remove = dwc3_glue_remove,
367 .platdata_auto_alloc_size = sizeof(struct dwc3_glue_data),