usb/dwc3/ulpi.c

1 // SPDX-License-Identifier: GPL-2.0
3  * ulpi.c - DesignWare USB3 Controller's ULPI PHY interface
12 #include <linux/ulpi/regs.h>
36 	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));  in dwc3_ulpi_busyloop()
40 	while (count--) {  in dwc3_ulpi_busyloop()
42 		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));  in dwc3_ulpi_busyloop()
44 			return 0;  in dwc3_ulpi_busyloop()
48 	return -ETIMEDOUT;  in dwc3_ulpi_busyloop()
58 	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);  in dwc3_ulpi_read()
64 	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));  in dwc3_ulpi_read()
76 	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);  in dwc3_ulpi_write()
89 	dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi_ops);  in dwc3_ulpi_init()
90 	if (IS_ERR(dwc->ulpi)) {  in dwc3_ulpi_init()
91 		dev_err(dwc->dev, "failed to register ULPI interface");  in dwc3_ulpi_init()
92 		return PTR_ERR(dwc->ulpi);  in dwc3_ulpi_init()
95 	return 0;  in dwc3_ulpi_init()
100 	if (dwc->ulpi) {  in dwc3_ulpi_exit()
101 		ulpi_unregister_interface(dwc->ulpi);  in dwc3_ulpi_exit()
102 		dwc->ulpi = NULL;  in dwc3_ulpi_exit()