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>
26 struct dwc3_generic_plat {
29 enum usb_dr_mode dr_mode;
32 struct dwc3_generic_priv {
39 struct dwc3_generic_host_priv {
40 struct xhci_ctrl xhci_ctrl;
41 struct dwc3_generic_priv gen_priv;
44 static int dwc3_generic_probe(struct udevice *dev,
45 struct dwc3_generic_priv *priv)
48 struct dwc3_generic_plat *plat = dev_get_platdata(dev);
49 struct dwc3 *dwc3 = &priv->dwc3;
52 dwc3->maximum_speed = plat->maximum_speed;
53 dwc3->dr_mode = plat->dr_mode;
54 #if CONFIG_IS_ENABLED(OF_CONTROL)
58 rc = dwc3_setup_phy(dev, &priv->phys, &priv->num_phys);
62 priv->base = map_physmem(plat->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
63 dwc3->regs = priv->base + DWC3_GLOBALS_REGS_START;
68 unmap_physmem(priv->base, MAP_NOCACHE);
75 static int dwc3_generic_remove(struct udevice *dev,
76 struct dwc3_generic_priv *priv)
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_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_info("No USB maximum speed specified. Using super speed\n");
97 plat->maximum_speed = USB_SPEED_SUPER;
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 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
110 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
112 struct dwc3_generic_priv *priv = dev_get_priv(dev);
113 struct dwc3 *dwc3 = &priv->dwc3;
115 dwc3_gadget_uboot_handle_interrupt(dwc3);
120 static int dwc3_generic_peripheral_probe(struct udevice *dev)
122 struct dwc3_generic_priv *priv = dev_get_priv(dev);
124 return dwc3_generic_probe(dev, priv);
127 static int dwc3_generic_peripheral_remove(struct udevice *dev)
129 struct dwc3_generic_priv *priv = dev_get_priv(dev);
131 return dwc3_generic_remove(dev, priv);
134 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
135 .name = "dwc3-generic-peripheral",
136 .id = UCLASS_USB_GADGET_GENERIC,
137 .ofdata_to_platdata = dwc3_generic_ofdata_to_platdata,
138 .probe = dwc3_generic_peripheral_probe,
139 .remove = dwc3_generic_peripheral_remove,
140 .priv_auto_alloc_size = sizeof(struct dwc3_generic_priv),
141 .platdata_auto_alloc_size = sizeof(struct dwc3_generic_plat),
145 #if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
146 static int dwc3_generic_host_probe(struct udevice *dev)
148 struct xhci_hcor *hcor;
149 struct xhci_hccr *hccr;
150 struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
153 rc = dwc3_generic_probe(dev, &priv->gen_priv);
157 hccr = (struct xhci_hccr *)priv->gen_priv.base;
158 hcor = (struct xhci_hcor *)(priv->gen_priv.base +
159 HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
161 return xhci_register(dev, hccr, hcor);
164 static int dwc3_generic_host_remove(struct udevice *dev)
166 struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
169 rc = xhci_deregister(dev);
173 return dwc3_generic_remove(dev, &priv->gen_priv);
176 U_BOOT_DRIVER(dwc3_generic_host) = {
177 .name = "dwc3-generic-host",
179 .ofdata_to_platdata = dwc3_generic_ofdata_to_platdata,
180 .probe = dwc3_generic_host_probe,
181 .remove = dwc3_generic_host_remove,
182 .priv_auto_alloc_size = sizeof(struct dwc3_generic_host_priv),
183 .platdata_auto_alloc_size = sizeof(struct dwc3_generic_plat),
184 .ops = &xhci_usb_ops,
185 .flags = DM_FLAG_ALLOC_PRIV_DMA,
189 struct dwc3_glue_data {
190 struct clk_bulk clks;
191 struct reset_ctl_bulk resets;
195 struct dwc3_glue_ops {
196 void (*select_dr_mode)(struct udevice *dev, int index,
197 enum usb_dr_mode mode);
200 void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
201 enum usb_dr_mode mode)
203 #define USBOTGSS_UTMI_OTG_STATUS 0x0084
204 #define USBOTGSS_UTMI_OTG_OFFSET 0x0480
206 /* UTMI_OTG_STATUS REGISTER */
207 #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE BIT(31)
208 #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT BIT(9)
209 #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
210 #define USBOTGSS_UTMI_OTG_STATUS_IDDIG BIT(4)
211 #define USBOTGSS_UTMI_OTG_STATUS_SESSEND BIT(3)
212 #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID BIT(2)
213 #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID BIT(1)
214 enum dwc3_omap_utmi_mode {
215 DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
216 DWC3_OMAP_UTMI_MODE_HW,
217 DWC3_OMAP_UTMI_MODE_SW,
224 u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;
226 struct dwc3_glue_data *glue = dev_get_platdata(dev);
227 void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);
229 if (device_is_compatible(dev, "ti,am437x-dwc3"))
230 utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;
232 utmi_mode = dev_read_u32_default(dev, "utmi-mode",
233 DWC3_OMAP_UTMI_MODE_UNKNOWN);
234 if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
235 debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
237 mode = USB_DR_MODE_PERIPHERAL;
241 case USB_DR_MODE_PERIPHERAL:
245 case USB_DR_MODE_HOST:
249 case USB_DR_MODE_OTG:
256 reg = readl(base + utmi_status_offset);
258 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
260 reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
262 writel(reg, base + utmi_status_offset);
264 reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
265 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
266 USBOTGSS_UTMI_OTG_STATUS_IDDIG);
268 reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
269 USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
272 reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
273 USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;
275 writel(reg, base + utmi_status_offset);
277 unmap_physmem(base, MAP_NOCACHE);
280 struct dwc3_glue_ops ti_ops = {
281 .select_dr_mode = dwc3_ti_select_dr_mode,
284 static int dwc3_glue_bind(struct udevice *parent)
286 const void *fdt = gd->fdt_blob;
290 for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
291 node = fdt_next_subnode(fdt, node)) {
292 const char *name = fdt_get_name(fdt, node, NULL);
293 enum usb_dr_mode dr_mode;
295 const char *driver = NULL;
297 debug("%s: subnode name: %s\n", __func__, name);
299 dr_mode = usb_get_dr_mode(node);
302 case USB_DR_MODE_PERIPHERAL:
303 case USB_DR_MODE_OTG:
304 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
305 debug("%s: dr_mode: OTG or Peripheral\n", __func__);
306 driver = "dwc3-generic-peripheral";
309 #if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
310 case USB_DR_MODE_HOST:
311 debug("%s: dr_mode: HOST\n", __func__);
312 driver = "dwc3-generic-host";
316 debug("%s: unsupported dr_mode\n", __func__);
323 ret = device_bind_driver_to_node(parent, driver, name,
324 offset_to_ofnode(node), &dev);
326 debug("%s: not able to bind usb device mode\n",
335 static int dwc3_glue_reset_init(struct udevice *dev,
336 struct dwc3_glue_data *glue)
340 ret = reset_get_bulk(dev, &glue->resets);
341 if (ret == -ENOTSUPP)
346 ret = reset_deassert_bulk(&glue->resets);
348 reset_release_bulk(&glue->resets);
355 static int dwc3_glue_clk_init(struct udevice *dev,
356 struct dwc3_glue_data *glue)
360 ret = clk_get_bulk(dev, &glue->clks);
366 #if CONFIG_IS_ENABLED(CLK)
367 ret = clk_enable_bulk(&glue->clks);
369 clk_release_bulk(&glue->clks);
377 static int dwc3_glue_probe(struct udevice *dev)
379 struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
380 struct dwc3_glue_data *glue = dev_get_platdata(dev);
381 struct udevice *child = NULL;
385 glue->regs = dev_read_addr(dev);
387 ret = dwc3_glue_clk_init(dev, glue);
391 ret = dwc3_glue_reset_init(dev, glue);
395 ret = device_find_first_child(dev, &child);
400 enum usb_dr_mode dr_mode;
402 dr_mode = usb_get_dr_mode(dev_of_offset(child));
403 device_find_next_child(&child);
404 if (ops && ops->select_dr_mode)
405 ops->select_dr_mode(dev, index, dr_mode);
412 static int dwc3_glue_remove(struct udevice *dev)
414 struct dwc3_glue_data *glue = dev_get_platdata(dev);
416 reset_release_bulk(&glue->resets);
418 clk_release_bulk(&glue->clks);
423 static const struct udevice_id dwc3_glue_ids[] = {
424 { .compatible = "xlnx,zynqmp-dwc3" },
425 { .compatible = "ti,keystone-dwc3"},
426 { .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
427 { .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops },
431 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
432 .name = "dwc3-generic-wrapper",
434 .of_match = dwc3_glue_ids,
435 .bind = dwc3_glue_bind,
436 .probe = dwc3_glue_probe,
437 .remove = dwc3_glue_remove,
438 .platdata_auto_alloc_size = sizeof(struct dwc3_glue_data),