1231ece36SClaudiu Manoil // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) 2231ece36SClaudiu Manoil /* Copyright 2019 NXP */ 3231ece36SClaudiu Manoil #include <linux/of_mdio.h> 4231ece36SClaudiu Manoil #include "enetc_mdio.h" 5231ece36SClaudiu Manoil 6231ece36SClaudiu Manoil #define ENETC_MDIO_DEV_ID 0xee01 7231ece36SClaudiu Manoil #define ENETC_MDIO_DEV_NAME "FSL PCIe IE Central MDIO" 8231ece36SClaudiu Manoil #define ENETC_MDIO_BUS_NAME ENETC_MDIO_DEV_NAME " Bus" 9231ece36SClaudiu Manoil #define ENETC_MDIO_DRV_NAME ENETC_MDIO_DEV_NAME " driver" 10231ece36SClaudiu Manoil 11231ece36SClaudiu Manoil static int enetc_pci_mdio_probe(struct pci_dev *pdev, 12231ece36SClaudiu Manoil const struct pci_device_id *ent) 13231ece36SClaudiu Manoil { 14231ece36SClaudiu Manoil struct enetc_mdio_priv *mdio_priv; 15231ece36SClaudiu Manoil struct device *dev = &pdev->dev; 16231ece36SClaudiu Manoil struct enetc_hw *hw; 17231ece36SClaudiu Manoil struct mii_bus *bus; 18231ece36SClaudiu Manoil int err; 19231ece36SClaudiu Manoil 20231ece36SClaudiu Manoil hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL); 21231ece36SClaudiu Manoil if (!hw) 22231ece36SClaudiu Manoil return -ENOMEM; 23231ece36SClaudiu Manoil 24231ece36SClaudiu Manoil bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv)); 25231ece36SClaudiu Manoil if (!bus) 26231ece36SClaudiu Manoil return -ENOMEM; 27231ece36SClaudiu Manoil 28231ece36SClaudiu Manoil bus->name = ENETC_MDIO_BUS_NAME; 29231ece36SClaudiu Manoil bus->read = enetc_mdio_read; 30231ece36SClaudiu Manoil bus->write = enetc_mdio_write; 31231ece36SClaudiu Manoil bus->parent = dev; 32231ece36SClaudiu Manoil mdio_priv = bus->priv; 33231ece36SClaudiu Manoil mdio_priv->hw = hw; 34231ece36SClaudiu Manoil snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev)); 35231ece36SClaudiu Manoil 36231ece36SClaudiu Manoil pcie_flr(pdev); 37231ece36SClaudiu Manoil err = pci_enable_device_mem(pdev); 38231ece36SClaudiu Manoil if (err) { 39231ece36SClaudiu Manoil dev_err(dev, "device enable failed\n"); 40231ece36SClaudiu Manoil return err; 41231ece36SClaudiu Manoil } 42231ece36SClaudiu Manoil 43231ece36SClaudiu Manoil err = pci_request_region(pdev, 0, KBUILD_MODNAME); 44231ece36SClaudiu Manoil if (err) { 45231ece36SClaudiu Manoil dev_err(dev, "pci_request_region failed\n"); 46231ece36SClaudiu Manoil goto err_pci_mem_reg; 47231ece36SClaudiu Manoil } 48231ece36SClaudiu Manoil 49231ece36SClaudiu Manoil hw->port = pci_iomap(pdev, 0, 0); 50231ece36SClaudiu Manoil if (!hw->port) { 51231ece36SClaudiu Manoil err = -ENXIO; 52231ece36SClaudiu Manoil dev_err(dev, "iomap failed\n"); 53231ece36SClaudiu Manoil goto err_ioremap; 54231ece36SClaudiu Manoil } 55231ece36SClaudiu Manoil 56231ece36SClaudiu Manoil err = of_mdiobus_register(bus, dev->of_node); 57231ece36SClaudiu Manoil if (err) 58231ece36SClaudiu Manoil goto err_mdiobus_reg; 59231ece36SClaudiu Manoil 60231ece36SClaudiu Manoil pci_set_drvdata(pdev, bus); 61231ece36SClaudiu Manoil 62231ece36SClaudiu Manoil return 0; 63231ece36SClaudiu Manoil 64231ece36SClaudiu Manoil err_mdiobus_reg: 65231ece36SClaudiu Manoil iounmap(mdio_priv->hw->port); 66231ece36SClaudiu Manoil err_ioremap: 67231ece36SClaudiu Manoil pci_release_mem_regions(pdev); 68231ece36SClaudiu Manoil err_pci_mem_reg: 69231ece36SClaudiu Manoil pci_disable_device(pdev); 70231ece36SClaudiu Manoil 71231ece36SClaudiu Manoil return err; 72231ece36SClaudiu Manoil } 73231ece36SClaudiu Manoil 74231ece36SClaudiu Manoil static void enetc_pci_mdio_remove(struct pci_dev *pdev) 75231ece36SClaudiu Manoil { 76231ece36SClaudiu Manoil struct mii_bus *bus = pci_get_drvdata(pdev); 77231ece36SClaudiu Manoil struct enetc_mdio_priv *mdio_priv; 78231ece36SClaudiu Manoil 79231ece36SClaudiu Manoil mdiobus_unregister(bus); 80231ece36SClaudiu Manoil mdio_priv = bus->priv; 81231ece36SClaudiu Manoil iounmap(mdio_priv->hw->port); 82231ece36SClaudiu Manoil pci_release_mem_regions(pdev); 83231ece36SClaudiu Manoil pci_disable_device(pdev); 84231ece36SClaudiu Manoil } 85231ece36SClaudiu Manoil 86231ece36SClaudiu Manoil static const struct pci_device_id enetc_pci_mdio_id_table[] = { 87231ece36SClaudiu Manoil { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID) }, 88231ece36SClaudiu Manoil { 0, } /* End of table. */ 89231ece36SClaudiu Manoil }; 90231ece36SClaudiu Manoil MODULE_DEVICE_TABLE(pci, enetc_pci_mdio_id_table); 91231ece36SClaudiu Manoil 92231ece36SClaudiu Manoil static struct pci_driver enetc_pci_mdio_driver = { 93231ece36SClaudiu Manoil .name = KBUILD_MODNAME, 94231ece36SClaudiu Manoil .id_table = enetc_pci_mdio_id_table, 95231ece36SClaudiu Manoil .probe = enetc_pci_mdio_probe, 96231ece36SClaudiu Manoil .remove = enetc_pci_mdio_remove, 97231ece36SClaudiu Manoil }; 98231ece36SClaudiu Manoil module_pci_driver(enetc_pci_mdio_driver); 99231ece36SClaudiu Manoil 100231ece36SClaudiu Manoil MODULE_DESCRIPTION(ENETC_MDIO_DRV_NAME); 101231ece36SClaudiu Manoil MODULE_LICENSE("Dual BSD/GPL"); 102