1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
40 	struct ipq4019_mdio_data *priv = bus->priv;  in ipq4019_mdio_wait_busy()
43 	return readl_poll_timeout(priv->membase + MDIO_CMD_REG, busy,  in ipq4019_mdio_wait_busy()
50 	struct ipq4019_mdio_data *priv = bus->priv;  in ipq4019_mdio_read()
55 		return -ETIMEDOUT;  in ipq4019_mdio_read()
63 		data = readl(priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_read()
67 		writel(data, priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_read()
70 		writel((mii_id << 8) | mmd, priv->membase + MDIO_ADDR_REG);  in ipq4019_mdio_read()
73 		writel(reg, priv->membase + MDIO_DATA_WRITE_REG);  in ipq4019_mdio_read()
78 		data = readl(priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_read()
82 		writel(data, priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_read()
85 		writel((mii_id << 8) | regnum, priv->membase + MDIO_ADDR_REG);  in ipq4019_mdio_read()
91 	writel(cmd, priv->membase + MDIO_CMD_REG);  in ipq4019_mdio_read()
95 		return -ETIMEDOUT;  in ipq4019_mdio_read()
100 		writel(cmd, priv->membase + MDIO_CMD_REG);  in ipq4019_mdio_read()
103 			return -ETIMEDOUT;  in ipq4019_mdio_read()
107 	return readl(priv->membase + MDIO_DATA_READ_REG);  in ipq4019_mdio_read()
113 	struct ipq4019_mdio_data *priv = bus->priv;  in ipq4019_mdio_write()
118 		return -ETIMEDOUT;  in ipq4019_mdio_write()
126 		data = readl(priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_write()
130 		writel(data, priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_write()
133 		writel((mii_id << 8) | mmd, priv->membase + MDIO_ADDR_REG);  in ipq4019_mdio_write()
136 		writel(reg, priv->membase + MDIO_DATA_WRITE_REG);  in ipq4019_mdio_write()
140 		writel(cmd, priv->membase + MDIO_CMD_REG);  in ipq4019_mdio_write()
143 			return -ETIMEDOUT;  in ipq4019_mdio_write()
146 		data = readl(priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_write()
150 		writel(data, priv->membase + MDIO_MODE_REG);  in ipq4019_mdio_write()
153 		writel((mii_id << 8) | regnum, priv->membase + MDIO_ADDR_REG);  in ipq4019_mdio_write()
157 	writel(value, priv->membase + MDIO_DATA_WRITE_REG);  in ipq4019_mdio_write()
165 	writel(cmd, priv->membase + MDIO_CMD_REG);  in ipq4019_mdio_write()
169 		return -ETIMEDOUT;  in ipq4019_mdio_write()
180 	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv));  in ipq4019_mdio_probe()
182 		return -ENOMEM;  in ipq4019_mdio_probe()
184 	priv = bus->priv;  in ipq4019_mdio_probe()
186 	priv->membase = devm_platform_ioremap_resource(pdev, 0);  in ipq4019_mdio_probe()
187 	if (IS_ERR(priv->membase))  in ipq4019_mdio_probe()
188 		return PTR_ERR(priv->membase);  in ipq4019_mdio_probe()
190 	bus->name = "ipq4019_mdio";  in ipq4019_mdio_probe()
191 	bus->read = ipq4019_mdio_read;  in ipq4019_mdio_probe()
192 	bus->write = ipq4019_mdio_write;  in ipq4019_mdio_probe()
193 	bus->parent = &pdev->dev;  in ipq4019_mdio_probe()
194 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id);  in ipq4019_mdio_probe()
196 	ret = of_mdiobus_register(bus, pdev->dev.of_node);  in ipq4019_mdio_probe()
198 		dev_err(&pdev->dev, "Cannot register MDIO bus!\n");  in ipq4019_mdio_probe()
217 	{ .compatible = "qcom,ipq4019-mdio" },
226 		.name = "ipq4019-mdio",
233 MODULE_DESCRIPTION("ipq4019 MDIO interface driver");