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>
5#include "enetc_pf.h"
6
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"
11
12static int enetc_pci_mdio_probe(struct pci_dev *pdev,
13				const struct pci_device_id *ent)
14{
15	struct enetc_mdio_priv *mdio_priv;
16	struct device *dev = &pdev->dev;
17	void __iomem *port_regs;
18	struct enetc_hw *hw;
19	struct mii_bus *bus;
20	int err;
21
22	port_regs = pci_iomap(pdev, 0, 0);
23	if (!port_regs) {
24		dev_err(dev, "iomap failed\n");
25		err = -ENXIO;
26		goto err_ioremap;
27	}
28
29	hw = enetc_hw_alloc(dev, port_regs);
30	if (IS_ERR(hw)) {
31		err = PTR_ERR(hw);
32		goto err_hw_alloc;
33	}
34
35	bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
36	if (!bus) {
37		err = -ENOMEM;
38		goto err_mdiobus_alloc;
39	}
40
41	bus->name = ENETC_MDIO_BUS_NAME;
42	bus->read = enetc_mdio_read_c22;
43	bus->write = enetc_mdio_write_c22;
44	bus->read_c45 = enetc_mdio_read_c45;
45	bus->write_c45 = enetc_mdio_write_c45;
46	bus->parent = dev;
47	mdio_priv = bus->priv;
48	mdio_priv->hw = hw;
49	mdio_priv->mdio_base = ENETC_EMDIO_BASE;
50	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
51
52	pcie_flr(pdev);
53	err = pci_enable_device_mem(pdev);
54	if (err) {
55		dev_err(dev, "device enable failed\n");
56		goto err_pci_enable;
57	}
58
59	err = pci_request_region(pdev, 0, KBUILD_MODNAME);
60	if (err) {
61		dev_err(dev, "pci_request_region failed\n");
62		goto err_pci_mem_reg;
63	}
64
65	err = of_mdiobus_register(bus, dev->of_node);
66	if (err)
67		goto err_mdiobus_reg;
68
69	pci_set_drvdata(pdev, bus);
70
71	return 0;
72
73err_mdiobus_reg:
74	pci_release_region(pdev, 0);
75err_pci_mem_reg:
76	pci_disable_device(pdev);
77err_pci_enable:
78err_mdiobus_alloc:
79err_hw_alloc:
80	iounmap(port_regs);
81err_ioremap:
82	return err;
83}
84
85static void enetc_pci_mdio_remove(struct pci_dev *pdev)
86{
87	struct mii_bus *bus = pci_get_drvdata(pdev);
88	struct enetc_mdio_priv *mdio_priv;
89
90	mdiobus_unregister(bus);
91	mdio_priv = bus->priv;
92	iounmap(mdio_priv->hw->port);
93	pci_release_region(pdev, 0);
94	pci_disable_device(pdev);
95}
96
97static const struct pci_device_id enetc_pci_mdio_id_table[] = {
98	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID) },
99	{ 0, } /* End of table. */
100};
101MODULE_DEVICE_TABLE(pci, enetc_pci_mdio_id_table);
102
103static struct pci_driver enetc_pci_mdio_driver = {
104	.name = KBUILD_MODNAME,
105	.id_table = enetc_pci_mdio_id_table,
106	.probe = enetc_pci_mdio_probe,
107	.remove = enetc_pci_mdio_remove,
108};
109module_pci_driver(enetc_pci_mdio_driver);
110
111MODULE_DESCRIPTION(ENETC_MDIO_DRV_NAME);
112MODULE_LICENSE("Dual BSD/GPL");
113