dsa/realtek/realtek-mdio.c

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>
27 #include "realtek.h"
28 #include "realtek-mdio.h"
47 	struct mii_bus *bus = priv->bus;  in realtek_mdio_write()
50 	mutex_lock(&bus->mdio_lock);  in realtek_mdio_write()
52 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL0_REG, REALTEK_MDIO_ADDR_OP);  in realtek_mdio_write()
56 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_ADDRESS_REG, reg);  in realtek_mdio_write()
60 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_DATA_WRITE_REG, val);  in realtek_mdio_write()
64 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL1_REG, REALTEK_MDIO_WRITE_OP);  in realtek_mdio_write()
67 	mutex_unlock(&bus->mdio_lock);  in realtek_mdio_write()
75 	struct mii_bus *bus = priv->bus;  in realtek_mdio_read()
78 	mutex_lock(&bus->mdio_lock);  in realtek_mdio_read()
80 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL0_REG, REALTEK_MDIO_ADDR_OP);  in realtek_mdio_read()
84 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_ADDRESS_REG, reg);  in realtek_mdio_read()
88 	ret = bus->write(bus, priv->mdio_addr, REALTEK_MDIO_CTRL1_REG, REALTEK_MDIO_READ_OP);  in realtek_mdio_read()
92 	ret = bus->read(bus, priv->mdio_addr, REALTEK_MDIO_DATA_READ_REG);  in realtek_mdio_read()
99 	mutex_unlock(&bus->mdio_lock);  in realtek_mdio_read()
110  * realtek_mdio_probe() - Probe a platform device for an MDIO-connected switch
115  * values specific for MDIO-connected devices. Finally, it calls a common
118  * Context: Can sleep. Takes and releases priv->map_lock.
123 	struct device *dev = &mdiodev->dev;  in realtek_mdio_probe()
131 	priv->bus = mdiodev->bus;  in realtek_mdio_probe()
132 	priv->mdio_addr = mdiodev->addr;  in realtek_mdio_probe()
133 	priv->write_reg_noack = realtek_mdio_write;  in realtek_mdio_probe()
146  * realtek_mdio_remove() - Remove the driver of an MDIO-connected switch
157 	struct realtek_priv *priv = dev_get_drvdata(&mdiodev->dev);  in realtek_mdio_remove()
169  * realtek_mdio_shutdown() - Shutdown the driver of a MDIO-connected switch
180 	struct realtek_priv *priv = dev_get_drvdata(&mdiodev->dev);  in realtek_mdio_shutdown()