1 // SPDX-License-Identifier: GPL-2.0+
7 #include "realtek.h"
11  * rtl83xx_lock() - Locks the mutex used by regmaps
19  * Context: Can sleep. Holds priv->map_lock lock.
26 	mutex_lock(&priv->map_lock);  in rtl83xx_lock()
31  * rtl83xx_unlock() - Unlocks the mutex used by regmaps
36  * Context: Releases priv->map_lock lock.
43 	mutex_unlock(&priv->map_lock);  in rtl83xx_unlock()
49 	struct realtek_priv *priv = bus->priv;  in rtl83xx_user_mdio_read()
51 	return priv->ops->phy_read(priv, addr, regnum);  in rtl83xx_user_mdio_read()
57 	struct realtek_priv *priv = bus->priv;  in rtl83xx_user_mdio_write()
59 	return priv->ops->phy_write(priv, addr, regnum, val);  in rtl83xx_user_mdio_write()
63  * rtl83xx_setup_user_mdio() - register the user mii bus driver
66  * Registers the MDIO bus for built-in Ethernet PHYs, and associates it with
74 	struct realtek_priv *priv = ds->priv;  in rtl83xx_setup_user_mdio()
79 	mdio_np = of_get_child_by_name(priv->dev->of_node, "mdio");  in rtl83xx_setup_user_mdio()
81 		dev_err(priv->dev, "no MDIO bus node\n");  in rtl83xx_setup_user_mdio()
82 		return -ENODEV;  in rtl83xx_setup_user_mdio()
85 	bus = devm_mdiobus_alloc(priv->dev);  in rtl83xx_setup_user_mdio()
87 		ret = -ENOMEM;  in rtl83xx_setup_user_mdio()
91 	bus->priv = priv;  in rtl83xx_setup_user_mdio()
92 	bus->name = "Realtek user MII";  in rtl83xx_setup_user_mdio()
93 	bus->read = rtl83xx_user_mdio_read;  in rtl83xx_setup_user_mdio()
94 	bus->write = rtl83xx_user_mdio_write;  in rtl83xx_setup_user_mdio()
95 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s:user_mii", dev_name(priv->dev));  in rtl83xx_setup_user_mdio()
96 	bus->parent = priv->dev;  in rtl83xx_setup_user_mdio()
98 	ret = devm_of_mdiobus_register(priv->dev, bus, mdio_np);  in rtl83xx_setup_user_mdio()
100 		dev_err(priv->dev, "unable to register MDIO bus %s\n",  in rtl83xx_setup_user_mdio()
101 			bus->id);  in rtl83xx_setup_user_mdio()
105 	priv->user_mii_bus = bus;  in rtl83xx_setup_user_mdio()
115  * rtl83xx_probe() - probe a Realtek switch
140 		.reg_read = interface_info->reg_read,  in rtl83xx_probe()
141 		.reg_write = interface_info->reg_write,  in rtl83xx_probe()
150 		return ERR_PTR(-EINVAL);  in rtl83xx_probe()
152 	priv = devm_kzalloc(dev, size_add(sizeof(*priv), var->chip_data_sz),  in rtl83xx_probe()
155 		return ERR_PTR(-ENOMEM);  in rtl83xx_probe()
157 	mutex_init(&priv->map_lock);  in rtl83xx_probe()
160 	priv->map = devm_regmap_init(dev, NULL, priv, &rc);  in rtl83xx_probe()
161 	if (IS_ERR(priv->map)) {  in rtl83xx_probe()
162 		ret = PTR_ERR(priv->map);  in rtl83xx_probe()
168 	priv->map_nolock = devm_regmap_init(dev, NULL, priv, &rc);  in rtl83xx_probe()
169 	if (IS_ERR(priv->map_nolock)) {  in rtl83xx_probe()
170 		ret = PTR_ERR(priv->map_nolock);  in rtl83xx_probe()
176 	priv->dev = dev;  in rtl83xx_probe()
177 	priv->variant = var;  in rtl83xx_probe()
178 	priv->ops = var->ops;  in rtl83xx_probe()
179 	priv->chip_data = (void *)priv + sizeof(*priv);  in rtl83xx_probe()
181 	spin_lock_init(&priv->lock);  in rtl83xx_probe()
183 	priv->leds_disabled = of_property_read_bool(dev->of_node,  in rtl83xx_probe()
184 						    "realtek,disable-leds");  in rtl83xx_probe()
187 	priv->reset_ctl = devm_reset_control_get_optional(dev, NULL);  in rtl83xx_probe()
188 	if (IS_ERR(priv->reset_ctl))  in rtl83xx_probe()
189 		return dev_err_cast_probe(dev, priv->reset_ctl,  in rtl83xx_probe()
192 	priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in rtl83xx_probe()
193 	if (IS_ERR(priv->reset)) {  in rtl83xx_probe()
195 		return ERR_CAST(priv->reset);  in rtl83xx_probe()
200 	if (priv->reset_ctl || priv->reset) {  in rtl83xx_probe()
214  * rtl83xx_register_switch() - detects and register a switch
220  * Context: Can sleep. Takes and releases priv->map_lock.
225 	struct dsa_switch *ds = &priv->ds;  in rtl83xx_register_switch()
228 	ret = priv->ops->detect(priv);  in rtl83xx_register_switch()
230 		dev_err_probe(priv->dev, ret, "unable to detect switch\n");  in rtl83xx_register_switch()
234 	ds->priv = priv;  in rtl83xx_register_switch()
235 	ds->dev = priv->dev;  in rtl83xx_register_switch()
236 	ds->ops = priv->variant->ds_ops;  in rtl83xx_register_switch()
237 	ds->phylink_mac_ops = priv->variant->phylink_mac_ops;  in rtl83xx_register_switch()
238 	ds->num_ports = priv->num_ports;  in rtl83xx_register_switch()
242 		dev_err_probe(priv->dev, ret, "unable to register switch\n");  in rtl83xx_register_switch()
251  * rtl83xx_unregister_switch() - unregister a switch
261 	struct dsa_switch *ds = &priv->ds;  in rtl83xx_unregister_switch()
268  * rtl83xx_shutdown() - shutdown a switch
272  * to prevent realtek_{smi,mdio}_remove() from running afterwards, which is
280 	struct dsa_switch *ds = &priv->ds;  in rtl83xx_shutdown()
284 	dev_set_drvdata(priv->dev, NULL);  in rtl83xx_shutdown()
289  * rtl83xx_remove() - Cleanup a realtek switch driver
306 	ret = reset_control_assert(priv->reset_ctl);  in rtl83xx_reset_assert()
308 		dev_warn(priv->dev,  in rtl83xx_reset_assert()
312 	gpiod_set_value(priv->reset, true);  in rtl83xx_reset_assert()
319 	ret = reset_control_deassert(priv->reset_ctl);  in rtl83xx_reset_deassert()
321 		dev_warn(priv->dev,  in rtl83xx_reset_deassert()
325 	gpiod_set_value(priv->reset, false);  in rtl83xx_reset_deassert()
330 MODULE_DESCRIPTION("Realtek DSA switches common module");