^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2009-2015 Cavium, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/of_mdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/phy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "mdio-cavium.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static int octeon_mdiobus_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct cavium_mdiobus *bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct mii_bus *mii_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct resource *res_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) resource_size_t mdio_phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) resource_size_t regsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) union cvmx_smix_en smi_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (!mii_bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (res_mem == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) dev_err(&pdev->dev, "found no memory resource\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) bus = mii_bus->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) bus->mii_bus = mii_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) mdio_phys = res_mem->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) regsize = resource_size(res_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (!devm_request_mem_region(&pdev->dev, mdio_phys, regsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) res_mem->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) dev_err(&pdev->dev, "request_mem_region failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) bus->register_base = devm_ioremap(&pdev->dev, mdio_phys, regsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (!bus->register_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) dev_err(&pdev->dev, "dev_ioremap failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) smi_en.u64 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) smi_en.s.en = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) bus->mii_bus->name = KBUILD_MODNAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%px", bus->register_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) bus->mii_bus->parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) bus->mii_bus->read = cavium_mdiobus_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) bus->mii_bus->write = cavium_mdiobus_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) platform_set_drvdata(pdev, bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) goto fail_register;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) dev_info(&pdev->dev, "Probed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) fail_register:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) smi_en.u64 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int octeon_mdiobus_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct cavium_mdiobus *bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) union cvmx_smix_en smi_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) bus = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) mdiobus_unregister(bus->mii_bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) smi_en.u64 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const struct of_device_id octeon_mdiobus_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .compatible = "cavium,octeon-3860-mdio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct platform_driver octeon_mdiobus_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .of_match_table = octeon_mdiobus_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .probe = octeon_mdiobus_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .remove = octeon_mdiobus_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) module_platform_driver(octeon_mdiobus_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) MODULE_DESCRIPTION("Cavium OCTEON MDIO bus driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) MODULE_AUTHOR("David Daney");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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