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113 lines
2.6 KiB
113 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2009-2015 Cavium, Inc. |
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*/ |
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#include <linux/gfp.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/of_address.h> |
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#include <linux/of_mdio.h> |
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#include <linux/phy.h> |
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#include <linux/platform_device.h> |
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#include "mdio-cavium.h" |
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static int octeon_mdiobus_probe(struct platform_device *pdev) |
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{ |
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struct cavium_mdiobus *bus; |
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struct mii_bus *mii_bus; |
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struct resource *res_mem; |
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resource_size_t mdio_phys; |
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resource_size_t regsize; |
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union cvmx_smix_en smi_en; |
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int err = -ENOENT; |
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mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus)); |
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if (!mii_bus) |
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return -ENOMEM; |
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res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (res_mem == NULL) { |
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dev_err(&pdev->dev, "found no memory resource\n"); |
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return -ENXIO; |
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} |
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bus = mii_bus->priv; |
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bus->mii_bus = mii_bus; |
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mdio_phys = res_mem->start; |
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regsize = resource_size(res_mem); |
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if (!devm_request_mem_region(&pdev->dev, mdio_phys, regsize, |
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res_mem->name)) { |
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dev_err(&pdev->dev, "request_mem_region failed\n"); |
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return -ENXIO; |
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} |
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bus->register_base = devm_ioremap(&pdev->dev, mdio_phys, regsize); |
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if (!bus->register_base) { |
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dev_err(&pdev->dev, "dev_ioremap failed\n"); |
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return -ENOMEM; |
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} |
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smi_en.u64 = 0; |
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smi_en.s.en = 1; |
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oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN); |
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bus->mii_bus->name = KBUILD_MODNAME; |
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snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%px", bus->register_base); |
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bus->mii_bus->parent = &pdev->dev; |
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bus->mii_bus->read = cavium_mdiobus_read; |
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bus->mii_bus->write = cavium_mdiobus_write; |
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platform_set_drvdata(pdev, bus); |
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err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node); |
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if (err) |
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goto fail_register; |
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dev_info(&pdev->dev, "Probed\n"); |
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return 0; |
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fail_register: |
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smi_en.u64 = 0; |
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oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN); |
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return err; |
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} |
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static int octeon_mdiobus_remove(struct platform_device *pdev) |
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{ |
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struct cavium_mdiobus *bus; |
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union cvmx_smix_en smi_en; |
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bus = platform_get_drvdata(pdev); |
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mdiobus_unregister(bus->mii_bus); |
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smi_en.u64 = 0; |
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oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN); |
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return 0; |
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} |
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static const struct of_device_id octeon_mdiobus_match[] = { |
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{ |
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.compatible = "cavium,octeon-3860-mdio", |
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}, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, octeon_mdiobus_match); |
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static struct platform_driver octeon_mdiobus_driver = { |
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.driver = { |
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.name = KBUILD_MODNAME, |
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.of_match_table = octeon_mdiobus_match, |
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}, |
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.probe = octeon_mdiobus_probe, |
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.remove = octeon_mdiobus_remove, |
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}; |
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module_platform_driver(octeon_mdiobus_driver); |
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MODULE_DESCRIPTION("Cavium OCTEON MDIO bus driver"); |
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MODULE_AUTHOR("David Daney"); |
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MODULE_LICENSE("GPL v2");
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