1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /* Copyright 2019 NXP */
3 #include <linux/fsl/enetc_mdio.h>
4 #include <linux/of_mdio.h>
7 #define ENETC_MDIO_DEV_ID 0xee01
8 #define ENETC_MDIO_DEV_NAME "FSL PCIe IE Central MDIO"
9 #define ENETC_MDIO_BUS_NAME ENETC_MDIO_DEV_NAME " Bus"
10 #define ENETC_MDIO_DRV_NAME ENETC_MDIO_DEV_NAME " driver"
12 static int enetc_pci_mdio_probe(struct pci_dev *pdev,
13 const struct pci_device_id *ent)
15 struct enetc_mdio_priv *mdio_priv;
16 struct device *dev = &pdev->dev;
17 void __iomem *port_regs;
22 port_regs = pci_iomap(pdev, 0, 0);
24 dev_err(dev, "iomap failed\n");
29 hw = enetc_hw_alloc(dev, port_regs);
35 bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
38 goto err_mdiobus_alloc;
41 bus->name = ENETC_MDIO_BUS_NAME;
42 bus->read = enetc_mdio_read;
43 bus->write = enetc_mdio_write;
45 mdio_priv = bus->priv;
47 mdio_priv->mdio_base = ENETC_EMDIO_BASE;
48 snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
51 err = pci_enable_device_mem(pdev);
53 dev_err(dev, "device enable failed\n");
57 err = pci_request_region(pdev, 0, KBUILD_MODNAME);
59 dev_err(dev, "pci_request_region failed\n");
63 err = of_mdiobus_register(bus, dev->of_node);
67 pci_set_drvdata(pdev, bus);
72 pci_release_mem_regions(pdev);
74 pci_disable_device(pdev);
83 static void enetc_pci_mdio_remove(struct pci_dev *pdev)
85 struct mii_bus *bus = pci_get_drvdata(pdev);
86 struct enetc_mdio_priv *mdio_priv;
88 mdiobus_unregister(bus);
89 mdio_priv = bus->priv;
90 iounmap(mdio_priv->hw->port);
91 pci_release_mem_regions(pdev);
92 pci_disable_device(pdev);
95 static const struct pci_device_id enetc_pci_mdio_id_table[] = {
96 { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID) },
97 { 0, } /* End of table. */
99 MODULE_DEVICE_TABLE(pci, enetc_pci_mdio_id_table);
101 static struct pci_driver enetc_pci_mdio_driver = {
102 .name = KBUILD_MODNAME,
103 .id_table = enetc_pci_mdio_id_table,
104 .probe = enetc_pci_mdio_probe,
105 .remove = enetc_pci_mdio_remove,
107 module_pci_driver(enetc_pci_mdio_driver);
109 MODULE_DESCRIPTION(ENETC_MDIO_DRV_NAME);
110 MODULE_LICENSE("Dual BSD/GPL");