1 // SPDX-License-Identifier: GPL-2.0
3  * ulpi.c - USB ULPI PHY bus
19 #include <linux/clk/clk-conf.h>
21 /* -------------------------------------------------------------------------- */
25 	return ulpi->ops->read(ulpi->dev.parent, addr);  in ulpi_read()
31 	return ulpi->ops->write(ulpi->dev.parent, addr, val);  in ulpi_write()
35 /* -------------------------------------------------------------------------- */
39 	struct ulpi_driver *drv = to_ulpi_driver(driver);  in ulpi_match()  local
41 	const struct ulpi_device_id *id;  in ulpi_match()  local
44 	 * Some ULPI devices don't have a vendor id  in ulpi_match()
47 	if (ulpi->id.vendor == 0 || !drv->id_table)  in ulpi_match()
50 	for (id = drv->id_table; id->vendor; id++)  in ulpi_match()
51 		if (id->vendor == ulpi->id.vendor &&  in ulpi_match()
52 		    id->product == ulpi->id.product)  in ulpi_match()
64 	if (ret != -ENODEV)  in ulpi_uevent()
68 			   ulpi->id.vendor, ulpi->id.product))  in ulpi_uevent()
69 		return -ENOMEM;  in ulpi_uevent()
75 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);  in ulpi_probe()  local
78 	ret = of_clk_set_defaults(dev->of_node, false);  in ulpi_probe()
82 	return drv->probe(to_ulpi_dev(dev));  in ulpi_probe()
87 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);  in ulpi_remove()  local
89 	if (drv->remove)  in ulpi_remove()
90 		drv->remove(to_ulpi_dev(dev));  in ulpi_remove()
101 /* -------------------------------------------------------------------------- */
110 	if (len != -ENODEV)  in modalias_show()
114 		       ulpi->id.vendor, ulpi->id.product);  in modalias_show()
134 	of_node_put(dev->of_node);  in ulpi_dev_release()
144 /* -------------------------------------------------------------------------- */
147  * __ulpi_register_driver - register a driver with the ULPI bus
148  * @drv: driver being registered
153 int __ulpi_register_driver(struct ulpi_driver *drv, struct module *module)  in __ulpi_register_driver()  argument
155 	if (!drv->probe)  in __ulpi_register_driver()
156 		return -EINVAL;  in __ulpi_register_driver()
158 	drv->driver.owner = module;  in __ulpi_register_driver()
159 	drv->driver.bus = &ulpi_bus;  in __ulpi_register_driver()
161 	return driver_register(&drv->driver);  in __ulpi_register_driver()
166  * ulpi_unregister_driver - unregister a driver with the ULPI bus
167  * @drv: driver to unregister
171 void ulpi_unregister_driver(struct ulpi_driver *drv)  in ulpi_unregister_driver()  argument
173 	driver_unregister(&drv->driver);  in ulpi_unregister_driver()
177 /* -------------------------------------------------------------------------- */
185 	parent = ulpi->dev.parent;  in ulpi_of_register()
186 	if (parent->of_node)  in ulpi_of_register()
187 		np = of_get_child_by_name(parent->of_node, "ulpi");  in ulpi_of_register()
188 	else if (parent->parent && parent->parent->of_node)  in ulpi_of_register()
189 		np = of_get_child_by_name(parent->parent->of_node, "ulpi");  in ulpi_of_register()
196 		return -EINVAL;  in ulpi_of_register()
198 	ulpi->dev.of_node = child;  in ulpi_of_register()
219 	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);  in ulpi_read_id()
220 	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;  in ulpi_read_id()
222 	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);  in ulpi_read_id()
223 	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;  in ulpi_read_id()
225 	/* Some ULPI devices don't have a vendor id so rely on OF match */  in ulpi_read_id()
226 	if (ulpi->id.vendor == 0)  in ulpi_read_id()
229 	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);  in ulpi_read_id()
232 	of_request_module(ulpi->dev.of_node);  in ulpi_read_id()
238 	struct ulpi *ulpi = seq->private;  in ulpi_regs_show()
247 	ulpi_print("Vendor ID Low               ", ULPI_VENDOR_ID_LOW);  in ulpi_regs_show()
248 	ulpi_print("Vendor ID High              ", ULPI_VENDOR_ID_HIGH);  in ulpi_regs_show()
249 	ulpi_print("Product ID Low              ", ULPI_PRODUCT_ID_LOW);  in ulpi_regs_show()
250 	ulpi_print("Product ID High             ", ULPI_PRODUCT_ID_HIGH);  in ulpi_regs_show()
281 	ulpi->dev.parent = dev; /* needed early for ops */  in ulpi_register()
282 	ulpi->dev.bus = &ulpi_bus;  in ulpi_register()
283 	ulpi->dev.type = &ulpi_dev_type;  in ulpi_register()
284 	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));  in ulpi_register()
286 	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));  in ulpi_register()
294 		of_node_put(ulpi->dev.of_node);  in ulpi_register()
298 	ret = device_register(&ulpi->dev);  in ulpi_register()
300 		put_device(&ulpi->dev);  in ulpi_register()
304 	root = debugfs_create_dir(dev_name(&ulpi->dev), ulpi_root);  in ulpi_register()
307 	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",  in ulpi_register()
308 		ulpi->id.vendor, ulpi->id.product);  in ulpi_register()
314  * ulpi_register_interface - instantiate new ULPI device
329 		return ERR_PTR(-ENOMEM);  in ulpi_register_interface()
331 	ulpi->ops = ops;  in ulpi_register_interface()
344  * ulpi_unregister_interface - unregister ULPI interface
352 	debugfs_lookup_and_remove(dev_name(&ulpi->dev), ulpi_root);  in ulpi_unregister_interface()
353 	device_unregister(&ulpi->dev);  in ulpi_unregister_interface()
357 /* -------------------------------------------------------------------------- */