1 // SPDX-License-Identifier: GPL-2.0+
3  * EHCI HCD (Host Controller Driver) for USB.
9  * Based on "ehci-ppc-of.c" by Valentine Barshak <vbarshak@ru.mvista.com>
10  * and "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
11  * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
23  * ehci_xilinx_port_handed_over - hand the port out if failed to enable it
24  * @hcd:	Pointer to the usb_hcd device to which the host controller bound
27  * This function is used as a place to tell the user that the Xilinx USB host
28  * controller does support LS devices. And in an HS only configuration, it
32  * There are cases when the host controller fails to enable the port due to,
38 	dev_warn(hcd->self.controller, "port %d cannot be enabled\n", portnum);  in ehci_xilinx_port_handed_over()
39 	if (hcd->has_tt) {  in ehci_xilinx_port_handed_over()
40 		dev_warn(hcd->self.controller,  in ehci_xilinx_port_handed_over()
43 		dev_warn(hcd->self.controller,  in ehci_xilinx_port_handed_over()
46 		dev_warn(hcd->self.controller,  in ehci_xilinx_port_handed_over()
48 		dev_warn(hcd->self.controller,  in ehci_xilinx_port_handed_over()
49 			"The USB host controller does not support full speed "  in ehci_xilinx_port_handed_over()
51 		dev_warn(hcd->self.controller,  in ehci_xilinx_port_handed_over()
52 			"You can reconfigure the host controller to have "  in ehci_xilinx_port_handed_over()
108  * ehci_hcd_xilinx_of_probe - Probe method for the USB host controller
109  * @op:		pointer to the platform_device bound to the host controller
112  * host controller. Because the Xilinx USB host controller can be configured
113  * as HS only or HS/FS only, it checks the configuration in the device tree
114  * entry, and sets an appropriate value for hcd->has_tt.
118 	struct device_node *dn = op->dev.of_node;  in ehci_hcd_xilinx_of_probe()
127 		return -ENODEV;  in ehci_hcd_xilinx_of_probe()
129 	dev_dbg(&op->dev, "initializing XILINX-OF USB Controller\n");  in ehci_hcd_xilinx_of_probe()
135 	hcd = usb_create_hcd(&ehci_xilinx_of_hc_driver, &op->dev,  in ehci_hcd_xilinx_of_probe()
136 				"XILINX-OF USB");  in ehci_hcd_xilinx_of_probe()
138 		return -ENOMEM;  in ehci_hcd_xilinx_of_probe()
140 	hcd->rsrc_start = res.start;  in ehci_hcd_xilinx_of_probe()
141 	hcd->rsrc_len = resource_size(&res);  in ehci_hcd_xilinx_of_probe()
145 		dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",  in ehci_hcd_xilinx_of_probe()
147 		rv = -EBUSY;  in ehci_hcd_xilinx_of_probe()
151 	hcd->regs = devm_ioremap_resource(&op->dev, &res);  in ehci_hcd_xilinx_of_probe()
152 	if (IS_ERR(hcd->regs)) {  in ehci_hcd_xilinx_of_probe()
153 		rv = PTR_ERR(hcd->regs);  in ehci_hcd_xilinx_of_probe()
159 	/* This core always has big-endian register interface and uses  in ehci_hcd_xilinx_of_probe()
160 	 * big-endian memory descriptors.  in ehci_hcd_xilinx_of_probe()
162 	ehci->big_endian_mmio = 1;  in ehci_hcd_xilinx_of_probe()
163 	ehci->big_endian_desc = 1;  in ehci_hcd_xilinx_of_probe()
167 	value = (int *)of_get_property(dn, "xlnx,support-usb-fs", NULL);  in ehci_hcd_xilinx_of_probe()
169 		ehci_dbg(ehci, "USB host controller supports FS devices\n");  in ehci_hcd_xilinx_of_probe()
170 		hcd->has_tt = 1;  in ehci_hcd_xilinx_of_probe()
173 			"USB host controller is HS only\n");  in ehci_hcd_xilinx_of_probe()
174 		hcd->has_tt = 0;  in ehci_hcd_xilinx_of_probe()
179 	ehci->caps = hcd->regs + 0x100;  in ehci_hcd_xilinx_of_probe()
183 		device_wakeup_enable(hcd->self.controller);  in ehci_hcd_xilinx_of_probe()
194  * ehci_hcd_xilinx_of_remove - shutdown hcd and release resources
204 	dev_dbg(&op->dev, "stopping XILINX-OF USB Controller\n");  in ehci_hcd_xilinx_of_remove()
214 		{.compatible = "xlnx,xps-usb-host-1.00.a",},
224 		.name = "xilinx-of-ehci",