1 // SPDX-License-Identifier: GPL-2.0
3  * ulpi.c - USB ULPI PHY bus
18 #include <linux/clk/clk-conf.h>
20 /* -------------------------------------------------------------------------- */
24 	return ulpi->ops->read(ulpi->dev.parent, addr);  in ulpi_read()
30 	return ulpi->ops->write(ulpi->dev.parent, addr, val);  in ulpi_write()
34 /* -------------------------------------------------------------------------- */
40 	const struct ulpi_device_id *id;  in ulpi_match()  local
43 	 * Some ULPI devices don't have a vendor id  in ulpi_match()
46 	if (ulpi->id.vendor == 0 || !drv->id_table)  in ulpi_match()
49 	for (id = drv->id_table; id->vendor; id++)  in ulpi_match()
50 		if (id->vendor == ulpi->id.vendor &&  in ulpi_match()
51 		    id->product == ulpi->id.product)  in ulpi_match()
63 	if (ret != -ENODEV)  in ulpi_uevent()
67 			   ulpi->id.vendor, ulpi->id.product))  in ulpi_uevent()
68 		return -ENOMEM;  in ulpi_uevent()
74 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);  in ulpi_probe()
77 	ret = of_clk_set_defaults(dev->of_node, false);  in ulpi_probe()
81 	return drv->probe(to_ulpi_dev(dev));  in ulpi_probe()
86 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);  in ulpi_remove()
88 	if (drv->remove)  in ulpi_remove()
89 		drv->remove(to_ulpi_dev(dev));  in ulpi_remove()
102 /* -------------------------------------------------------------------------- */
111 	if (len != -ENODEV)  in modalias_show()
115 		       ulpi->id.vendor, ulpi->id.product);  in modalias_show()
135 	of_node_put(dev->of_node);  in ulpi_dev_release()
145 /* -------------------------------------------------------------------------- */
148  * ulpi_register_driver - register a driver with the ULPI bus
156 	if (!drv->probe)  in __ulpi_register_driver()
157 		return -EINVAL;  in __ulpi_register_driver()
159 	drv->driver.owner = module;  in __ulpi_register_driver()
160 	drv->driver.bus = &ulpi_bus;  in __ulpi_register_driver()
162 	return driver_register(&drv->driver);  in __ulpi_register_driver()
167  * ulpi_unregister_driver - unregister a driver with the ULPI bus
174 	driver_unregister(&drv->driver);  in ulpi_unregister_driver()
178 /* -------------------------------------------------------------------------- */
186 	parent = ulpi->dev.parent;  in ulpi_of_register()
187 	if (parent->of_node)  in ulpi_of_register()
188 		np = of_get_child_by_name(parent->of_node, "ulpi");  in ulpi_of_register()
189 	else if (parent->parent && parent->parent->of_node)  in ulpi_of_register()
190 		np = of_get_child_by_name(parent->parent->of_node, "ulpi");  in ulpi_of_register()
197 		return -EINVAL;  in ulpi_of_register()
199 	ulpi->dev.of_node = child;  in ulpi_of_register()
220 	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);  in ulpi_read_id()
221 	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;  in ulpi_read_id()
223 	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);  in ulpi_read_id()
224 	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;  in ulpi_read_id()
226 	/* Some ULPI devices don't have a vendor id so rely on OF match */  in ulpi_read_id()
227 	if (ulpi->id.vendor == 0)  in ulpi_read_id()
230 	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);  in ulpi_read_id()
233 	of_device_request_module(&ulpi->dev);  in ulpi_read_id()
241 	ulpi->dev.parent = dev; /* needed early for ops */  in ulpi_register()
242 	ulpi->dev.bus = &ulpi_bus;  in ulpi_register()
243 	ulpi->dev.type = &ulpi_dev_type;  in ulpi_register()
244 	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));  in ulpi_register()
246 	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));  in ulpi_register()
254 		of_node_put(ulpi->dev.of_node);  in ulpi_register()
258 	ret = device_register(&ulpi->dev);  in ulpi_register()
260 		put_device(&ulpi->dev);  in ulpi_register()
264 	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",  in ulpi_register()
265 		ulpi->id.vendor, ulpi->id.product);  in ulpi_register()
271  * ulpi_register_interface - instantiate new ULPI device
286 		return ERR_PTR(-ENOMEM);  in ulpi_register_interface()
288 	ulpi->ops = ops;  in ulpi_register_interface()
301  * ulpi_unregister_interface - unregister ULPI interface
309 	device_unregister(&ulpi->dev);  in ulpi_unregister_interface()
313 /* -------------------------------------------------------------------------- */