[deliverable/linux.git] / drivers / net / phy / mdio-thunder.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2009-2016 Cavium, Inc.
 */

#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/phy.h>
#include <linux/io.h>
#include <linux/acpi.h>
#include <linux/pci.h>

#include "mdio-cavium.h"

struct thunder_mdiobus_nexus {
	void __iomem *bar0;
	struct cavium_mdiobus *buses[4];
};

static int thunder_mdiobus_pci_probe(struct pci_dev *pdev,
				     const struct pci_device_id *ent)
{
	struct device_node *node;
	struct fwnode_handle *fwn;
	struct thunder_mdiobus_nexus *nexus;
	int err;
	int i;

	nexus = devm_kzalloc(&pdev->dev, sizeof(*nexus), GFP_KERNEL);
	if (!nexus)
		return -ENOMEM;

	pci_set_drvdata(pdev, nexus);

	err = pcim_enable_device(pdev);
	if (err) {
		dev_err(&pdev->dev, "Failed to enable PCI device\n");
		pci_set_drvdata(pdev, NULL);
		return err;
	}

	err = pci_request_regions(pdev, KBUILD_MODNAME);
	if (err) {
		dev_err(&pdev->dev, "pci_request_regions failed\n");
		goto err_disable_device;
	}

	nexus->bar0 = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));
	if (!nexus->bar0) {
		err = -ENOMEM;
		goto err_release_regions;
	}

	i = 0;
	device_for_each_child_node(&pdev->dev, fwn) {
		struct resource r;
		struct mii_bus *mii_bus;
		struct cavium_mdiobus *bus;
		union cvmx_smix_en smi_en;

		/* If it is not an OF node we cannot handle it yet, so
		 * exit the loop.
		 */
		node = to_of_node(fwn);
		if (!node)
			break;

		err = of_address_to_resource(node, 0, &r);
		if (err) {
			dev_err(&pdev->dev,
				"Couldn't translate address for \"%s\"\n",
				node->name);
			break;
		}

		mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
		if (!mii_bus)
			break;
		bus = mii_bus->priv;
		bus->mii_bus = mii_bus;

		nexus->buses[i] = bus;
		i++;

		bus->register_base = (u64)nexus->bar0 +
			r.start - pci_resource_start(pdev, 0);

		smi_en.u64 = 0;
		smi_en.s.en = 1;
		oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
		bus->mii_bus->name = KBUILD_MODNAME;
		snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", r.start);
		bus->mii_bus->parent = &pdev->dev;
		bus->mii_bus->read = cavium_mdiobus_read;
		bus->mii_bus->write = cavium_mdiobus_write;

		err = of_mdiobus_register(bus->mii_bus, node);
		if (err)
			dev_err(&pdev->dev, "of_mdiobus_register failed\n");

		dev_info(&pdev->dev, "Added bus at %llx\n", r.start);
		if (i >= ARRAY_SIZE(nexus->buses))
			break;
	}
	return 0;

err_release_regions:
	pci_release_regions(pdev);

err_disable_device:
	pci_set_drvdata(pdev, NULL);
	return err;
}

static void thunder_mdiobus_pci_remove(struct pci_dev *pdev)
{
	int i;
	struct thunder_mdiobus_nexus *nexus = pci_get_drvdata(pdev);

	for (i = 0; i < ARRAY_SIZE(nexus->buses); i++) {
		struct cavium_mdiobus *bus = nexus->buses[i];

		if (!bus)
			continue;

		mdiobus_unregister(bus->mii_bus);
		mdiobus_free(bus->mii_bus);
		oct_mdio_writeq(0, bus->register_base + SMI_EN);
	}
	pci_set_drvdata(pdev, NULL);
}

static const struct pci_device_id thunder_mdiobus_id_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xa02b) },
	{ 0, } /* End of table. */
};
MODULE_DEVICE_TABLE(pci, thunder_mdiobus_id_table);

static struct pci_driver thunder_mdiobus_driver = {
	.name = KBUILD_MODNAME,
	.id_table = thunder_mdiobus_id_table,
	.probe = thunder_mdiobus_pci_probe,
	.remove = thunder_mdiobus_pci_remove,
};

module_pci_driver(thunder_mdiobus_driver);

MODULE_DESCRIPTION("Cavium ThunderX MDIO bus driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
379d7ac7 DD	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 2009-2016 Cavium, Inc.
	7	*/
	8
	9	#include <linux/of_address.h>
	10	#include <linux/of_mdio.h>
	11	#include <linux/module.h>
	12	#include <linux/gfp.h>
	13	#include <linux/phy.h>
	14	#include <linux/io.h>
	15	#include <linux/acpi.h>
	16	#include <linux/pci.h>
	17
	18	#include "mdio-cavium.h"
	19
	20	struct thunder_mdiobus_nexus {
	21	void __iomem *bar0;
	22	struct cavium_mdiobus *buses[4];
	23	};
	24
	25	static int thunder_mdiobus_pci_probe(struct pci_dev *pdev,
	26	const struct pci_device_id *ent)
	27	{
	28	struct device_node *node;
	29	struct fwnode_handle *fwn;
	30	struct thunder_mdiobus_nexus *nexus;
	31	int err;
	32	int i;
	33
	34	nexus = devm_kzalloc(&pdev->dev, sizeof(*nexus), GFP_KERNEL);
	35	if (!nexus)
	36	return -ENOMEM;
	37
	38	pci_set_drvdata(pdev, nexus);
	39
	40	err = pcim_enable_device(pdev);
	41	if (err) {
	42	dev_err(&pdev->dev, "Failed to enable PCI device\n");
	43	pci_set_drvdata(pdev, NULL);
	44	return err;
	45	}
	46
	47	err = pci_request_regions(pdev, KBUILD_MODNAME);
	48	if (err) {
	49	dev_err(&pdev->dev, "pci_request_regions failed\n");
	50	goto err_disable_device;
	51	}
	52
	53	nexus->bar0 = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));
	54	if (!nexus->bar0) {
	55	err = -ENOMEM;
	56	goto err_release_regions;
	57	}
	58
	59	i = 0;
	60	device_for_each_child_node(&pdev->dev, fwn) {
	61	struct resource r;
	62	struct mii_bus *mii_bus;
	63	struct cavium_mdiobus *bus;
	64	union cvmx_smix_en smi_en;
65
66	/* If it is not an OF node we cannot handle it yet, so
67	* exit the loop.
68	*/
69	node = to_of_node(fwn);
70	if (!node)
71	break;
72
73	err = of_address_to_resource(node, 0, &r);
74	if (err) {
75	dev_err(&pdev->dev,
76	"Couldn't translate address for \"%s\"\n",
77	node->name);
78	break;
79	}
80
81	mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
82	if (!mii_bus)
83	break;
84	bus = mii_bus->priv;
85	bus->mii_bus = mii_bus;
86
87	nexus->buses[i] = bus;
88	i++;
89
90	bus->register_base = (u64)nexus->bar0 +
91	r.start - pci_resource_start(pdev, 0);
92
93	smi_en.u64 = 0;
94	smi_en.s.en = 1;
95	oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
96	bus->mii_bus->name = KBUILD_MODNAME;
97	snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", r.start);
98	bus->mii_bus->parent = &pdev->dev;
99	bus->mii_bus->read = cavium_mdiobus_read;
100	bus->mii_bus->write = cavium_mdiobus_write;
101
102	err = of_mdiobus_register(bus->mii_bus, node);
103	if (err)
104	dev_err(&pdev->dev, "of_mdiobus_register failed\n");
105
106	dev_info(&pdev->dev, "Added bus at %llx\n", r.start);
107	if (i >= ARRAY_SIZE(nexus->buses))
108	break;
109	}
110	return 0;
111
112	err_release_regions:
113	pci_release_regions(pdev);
114
115	err_disable_device:
116	pci_set_drvdata(pdev, NULL);
117	return err;
118	}
119
120	static void thunder_mdiobus_pci_remove(struct pci_dev *pdev)
121	{
122	int i;
123	struct thunder_mdiobus_nexus *nexus = pci_get_drvdata(pdev);
124
125	for (i = 0; i < ARRAY_SIZE(nexus->buses); i++) {
126	struct cavium_mdiobus *bus = nexus->buses[i];
127
128	if (!bus)
129	continue;
130
131	mdiobus_unregister(bus->mii_bus);
132	mdiobus_free(bus->mii_bus);
133	oct_mdio_writeq(0, bus->register_base + SMI_EN);
134	}
135	pci_set_drvdata(pdev, NULL);
136	}
137
138	static const struct pci_device_id thunder_mdiobus_id_table[] = {
139	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xa02b) },
140	{ 0, } /* End of table. */
141	};
142	MODULE_DEVICE_TABLE(pci, thunder_mdiobus_id_table);
143
144	static struct pci_driver thunder_mdiobus_driver = {
145	.name = KBUILD_MODNAME,
146	.id_table = thunder_mdiobus_id_table,
147	.probe = thunder_mdiobus_pci_probe,
148	.remove = thunder_mdiobus_pci_remove,
149	};
150
151	module_pci_driver(thunder_mdiobus_driver);
152
153	MODULE_DESCRIPTION("Cavium ThunderX MDIO bus driver");
154	MODULE_LICENSE("GPL");