1 // SPDX-License-Identifier: GPL-2.0+
2 /* Realtek MDIO interface driver
6  * RTL8366   - The original version, apparently
7  * RTL8369   - Similar enough to have the same datsheet as RTL8366
8  * RTL8366RB - Probably reads out "RTL8366 revision B", has a quite
10  * RTL8366S  - Is this "RTL8366 super"?
11  * RTL8367   - Has an OpenWRT driver as well
12  * RTL8368S  - Seems to be an alternative name for RTL8366RB
13  * RTL8370   - Also uses SMI
19  * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
26 #include "realtek.h"
44 	struct mii_bus *bus = priv->bus;  in realtek_mdio_write()
47 	mutex_lock(&bus->mdio_lock);  in realtek_mdio_write()
49 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL0_REG, REALTEK_MDIO_ADDR_OP);  in realtek_mdio_write()
53 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_ADDRESS_REG, reg);  in realtek_mdio_write()
57 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_DATA_WRITE_REG, val);  in realtek_mdio_write()
61 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL1_REG, REALTEK_MDIO_WRITE_OP);  in realtek_mdio_write()
64 	mutex_unlock(&bus->mdio_lock);  in realtek_mdio_write()
72 	struct mii_bus *bus = priv->bus;  in realtek_mdio_read()
75 	mutex_lock(&bus->mdio_lock);  in realtek_mdio_read()
77 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL0_REG, REALTEK_MDIO_ADDR_OP);  in realtek_mdio_read()
81 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_ADDRESS_REG, reg);  in realtek_mdio_read()
85 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL1_REG, REALTEK_MDIO_READ_OP);  in realtek_mdio_read()
89 	ret = bus->read(bus, priv->mdio_addr, REALTEK_MDIO_DATA_READ_REG);  in realtek_mdio_read()
96 	mutex_unlock(&bus->mdio_lock);  in realtek_mdio_read()
105 	mutex_lock(&priv->map_lock);  in realtek_mdio_lock()
112 	mutex_unlock(&priv->map_lock);  in realtek_mdio_unlock()
145 	struct device *dev = &mdiodev->dev;  in realtek_mdio_probe()
153 		return -EINVAL;  in realtek_mdio_probe()
155 	priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);  in realtek_mdio_probe()
157 		return -ENOMEM;  in realtek_mdio_probe()
159 	mutex_init(&priv->map_lock);  in realtek_mdio_probe()
163 	priv->map = devm_regmap_init(dev, NULL, priv, &rc);  in realtek_mdio_probe()
164 	if (IS_ERR(priv->map)) {  in realtek_mdio_probe()
165 		ret = PTR_ERR(priv->map);  in realtek_mdio_probe()
171 	priv->map_nolock = devm_regmap_init(dev, NULL, priv, &rc);  in realtek_mdio_probe()
172 	if (IS_ERR(priv->map_nolock)) {  in realtek_mdio_probe()
173 		ret = PTR_ERR(priv->map_nolock);  in realtek_mdio_probe()
178 	priv->mdio_addr = mdiodev->addr;  in realtek_mdio_probe()
179 	priv->bus = mdiodev->bus;  in realtek_mdio_probe()
180 	priv->dev = &mdiodev->dev;  in realtek_mdio_probe()
181 	priv->chip_data = (void *)priv + sizeof(*priv);  in realtek_mdio_probe()
183 	priv->clk_delay = var->clk_delay;  in realtek_mdio_probe()
184 	priv->cmd_read = var->cmd_read;  in realtek_mdio_probe()
185 	priv->cmd_write = var->cmd_write;  in realtek_mdio_probe()
186 	priv->ops = var->ops;  in realtek_mdio_probe()
188 	priv->write_reg_noack = realtek_mdio_write;  in realtek_mdio_probe()
190 	np = dev->of_node;  in realtek_mdio_probe()
195 	priv->leds_disabled = of_property_read_bool(np, "realtek,disable-leds");  in realtek_mdio_probe()
197 	priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in realtek_mdio_probe()
198 	if (IS_ERR(priv->reset)) {  in realtek_mdio_probe()
200 		return PTR_ERR(priv->reset);  in realtek_mdio_probe()
203 	if (priv->reset) {  in realtek_mdio_probe()
204 		gpiod_set_value(priv->reset, 1);  in realtek_mdio_probe()
207 		gpiod_set_value(priv->reset, 0);  in realtek_mdio_probe()
212 	ret = priv->ops->detect(priv);  in realtek_mdio_probe()
218 	priv->ds = devm_kzalloc(dev, sizeof(*priv->ds), GFP_KERNEL);  in realtek_mdio_probe()
219 	if (!priv->ds)  in realtek_mdio_probe()
220 		return -ENOMEM;  in realtek_mdio_probe()
222 	priv->ds->dev = dev;  in realtek_mdio_probe()
223 	priv->ds->num_ports = priv->num_ports;  in realtek_mdio_probe()
224 	priv->ds->priv = priv;  in realtek_mdio_probe()
225 	priv->ds->ops = var->ds_ops_mdio;  in realtek_mdio_probe()
227 	ret = dsa_register_switch(priv->ds);  in realtek_mdio_probe()
229 		dev_err(priv->dev, "unable to register switch ret = %d\n", ret);  in realtek_mdio_probe()
238 	struct realtek_priv *priv = dev_get_drvdata(&mdiodev->dev);  in realtek_mdio_remove()
243 	dsa_unregister_switch(priv->ds);  in realtek_mdio_remove()
246 	if (priv->reset)  in realtek_mdio_remove()
247 		gpiod_set_value(priv->reset, 1);  in realtek_mdio_remove()
252 	struct realtek_priv *priv = dev_get_drvdata(&mdiodev->dev);  in realtek_mdio_shutdown()
257 	dsa_switch_shutdown(priv->ds);  in realtek_mdio_shutdown()
259 	dev_set_drvdata(&mdiodev->dev, NULL);  in realtek_mdio_shutdown()
264 	{ .compatible = "realtek,rtl8366rb", .data = &rtl8366rb_variant, },
267 	{ .compatible = "realtek,rtl8365mb", .data = &rtl8365mb_variant, },
275 		.name = "realtek-mdio",
286 MODULE_DESCRIPTION("Driver for Realtek ethernet switch connected via MDIO interface");