/* * Driver for the MDIO interface of Marvell network interfaces. * * Since the MDIO interface of Marvell network interfaces is shared * between all network interfaces, having a single driver allows to * handle concurrent accesses properly (you may have four Ethernet * ports, but they in fact share the same SMI interface to access * the MDIO bus). This driver is currently used by the mvneta and * mv643xx_eth drivers. * * Copyright (C) 2012 Marvell * * Thomas Petazzoni <[email protected]> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <linux/acpi.h> #include <linux/acpi_mdio.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/of_mdio.h> #include <linux/phy.h> #include <linux/platform_device.h> #include <linux/sched.h> #include <linux/wait.h> #define MVMDIO_SMI_DATA_SHIFT … #define MVMDIO_SMI_PHY_ADDR_SHIFT … #define MVMDIO_SMI_PHY_REG_SHIFT … #define MVMDIO_SMI_READ_OPERATION … #define MVMDIO_SMI_WRITE_OPERATION … #define MVMDIO_SMI_READ_VALID … #define MVMDIO_SMI_BUSY … #define MVMDIO_ERR_INT_CAUSE … #define MVMDIO_ERR_INT_SMI_DONE … #define MVMDIO_ERR_INT_MASK … #define MVMDIO_XSMI_MGNT_REG … #define MVMDIO_XSMI_PHYADDR_SHIFT … #define MVMDIO_XSMI_DEVADDR_SHIFT … #define MVMDIO_XSMI_WRITE_OPERATION … #define MVMDIO_XSMI_READ_OPERATION … #define MVMDIO_XSMI_READ_VALID … #define MVMDIO_XSMI_BUSY … #define MVMDIO_XSMI_ADDR_REG … #define MVMDIO_XSMI_CFG_REG … #define MVMDIO_XSMI_CLKDIV_MASK … #define MVMDIO_XSMI_CLKDIV_256 … #define MVMDIO_XSMI_CLKDIV_64 … #define MVMDIO_XSMI_CLKDIV_32 … #define MVMDIO_XSMI_CLKDIV_8 … /* * SMI Timeout measurements: * - Kirkwood 88F6281 (Globalscale Dreamplug): 45us to 95us (Interrupt) * - Armada 370 (Globalscale Mirabox): 41us to 43us (Polled) */ #define MVMDIO_SMI_TIMEOUT … struct orion_mdio_dev { … }; enum orion_mdio_bus_type { … }; struct orion_mdio_ops { … }; /* Wait for the SMI unit to be ready for another operation */ static int orion_mdio_wait_ready(const struct orion_mdio_ops *ops, struct mii_bus *bus) { … } static int orion_mdio_smi_is_done(struct orion_mdio_dev *dev) { … } static const struct orion_mdio_ops orion_mdio_smi_ops = …; static int orion_mdio_smi_read(struct mii_bus *bus, int mii_id, int regnum) { … } static int orion_mdio_smi_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) { … } static int orion_mdio_xsmi_is_done(struct orion_mdio_dev *dev) { … } static const struct orion_mdio_ops orion_mdio_xsmi_ops = …; static int orion_mdio_xsmi_read_c45(struct mii_bus *bus, int mii_id, int dev_addr, int regnum) { … } static int orion_mdio_xsmi_write_c45(struct mii_bus *bus, int mii_id, int dev_addr, int regnum, u16 value) { … } static void orion_mdio_xsmi_set_mdc_freq(struct mii_bus *bus) { … } static irqreturn_t orion_mdio_err_irq(int irq, void *dev_id) { … } static int orion_mdio_probe(struct platform_device *pdev) { … } static void orion_mdio_remove(struct platform_device *pdev) { … } static const struct of_device_id orion_mdio_match[] = …; MODULE_DEVICE_TABLE(of, orion_mdio_match); #ifdef CONFIG_ACPI static const struct acpi_device_id orion_mdio_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, orion_mdio_acpi_match); #endif static struct platform_driver orion_mdio_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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