// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
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/* Copyright 2019 NXP */
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#include <linux/fsl/enetc_mdio.h>
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#include <linux/of_mdio.h>
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#include "enetc_pf.h"
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#define ENETC_MDIO_DEV_ID 0xee01
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#define ENETC_MDIO_DEV_NAME "FSL PCIe IE Central MDIO"
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#define ENETC_MDIO_BUS_NAME ENETC_MDIO_DEV_NAME " Bus"
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#define ENETC_MDIO_DRV_NAME ENETC_MDIO_DEV_NAME " driver"
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static int enetc_pci_mdio_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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struct enetc_mdio_priv *mdio_priv;
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struct device *dev = &pdev->dev;
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void __iomem *port_regs;
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struct enetc_hw *hw;
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struct mii_bus *bus;
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int err;
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port_regs = pci_iomap(pdev, 0, 0);
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if (!port_regs) {
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dev_err(dev, "iomap failed\n");
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err = -ENXIO;
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goto err_ioremap;
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}
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hw = enetc_hw_alloc(dev, port_regs);
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if (IS_ERR(hw)) {
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err = PTR_ERR(hw);
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goto err_hw_alloc;
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}
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bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
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if (!bus) {
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err = -ENOMEM;
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goto err_mdiobus_alloc;
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}
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bus->name = ENETC_MDIO_BUS_NAME;
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bus->read = enetc_mdio_read;
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bus->write = enetc_mdio_write;
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bus->parent = dev;
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mdio_priv = bus->priv;
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mdio_priv->hw = hw;
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mdio_priv->mdio_base = ENETC_EMDIO_BASE;
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snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
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pcie_flr(pdev);
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err = pci_enable_device_mem(pdev);
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if (err) {
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dev_err(dev, "device enable failed\n");
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goto err_pci_enable;
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}
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err = pci_request_region(pdev, 0, KBUILD_MODNAME);
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if (err) {
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dev_err(dev, "pci_request_region failed\n");
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goto err_pci_mem_reg;
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}
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err = of_mdiobus_register(bus, dev->of_node);
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if (err)
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goto err_mdiobus_reg;
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pci_set_drvdata(pdev, bus);
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return 0;
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err_mdiobus_reg:
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pci_release_mem_regions(pdev);
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err_pci_mem_reg:
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pci_disable_device(pdev);
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err_pci_enable:
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err_mdiobus_alloc:
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err_hw_alloc:
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iounmap(port_regs);
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err_ioremap:
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return err;
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}
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static void enetc_pci_mdio_remove(struct pci_dev *pdev)
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{
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struct mii_bus *bus = pci_get_drvdata(pdev);
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struct enetc_mdio_priv *mdio_priv;
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mdiobus_unregister(bus);
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mdio_priv = bus->priv;
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iounmap(mdio_priv->hw->port);
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pci_release_mem_regions(pdev);
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pci_disable_device(pdev);
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}
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static const struct pci_device_id enetc_pci_mdio_id_table[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID) },
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{ 0, } /* End of table. */
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};
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MODULE_DEVICE_TABLE(pci, enetc_pci_mdio_id_table);
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static struct pci_driver enetc_pci_mdio_driver = {
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.name = KBUILD_MODNAME,
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.id_table = enetc_pci_mdio_id_table,
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.probe = enetc_pci_mdio_probe,
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.remove = enetc_pci_mdio_remove,
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};
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module_pci_driver(enetc_pci_mdio_driver);
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MODULE_DESCRIPTION(ENETC_MDIO_DRV_NAME);
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MODULE_LICENSE("Dual BSD/GPL");
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