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Not all devices on an MDIO bus are PHYs. Meaning not all MDIO drivers are PHY drivers. Add support for generic MDIO drivers. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,169 @@ | ||
| /* Framework for MDIO devices, other than PHYs. | ||
| * | ||
| * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch> | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the | ||
| * Free Software Foundation; either version 2 of the License, or (at your | ||
| * option) any later version. | ||
| * | ||
| */ | ||
|
|
||
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | ||
|
|
||
| #include <linux/errno.h> | ||
| #include <linux/init.h> | ||
| #include <linux/interrupt.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/mdio.h> | ||
| #include <linux/mii.h> | ||
| #include <linux/module.h> | ||
| #include <linux/phy.h> | ||
| #include <linux/slab.h> | ||
| #include <linux/string.h> | ||
| #include <linux/unistd.h> | ||
|
|
||
| void mdio_device_free(struct mdio_device *mdiodev) | ||
| { | ||
| put_device(&mdiodev->dev); | ||
| } | ||
| EXPORT_SYMBOL(mdio_device_free); | ||
|
|
||
| static void mdio_device_release(struct device *dev) | ||
| { | ||
| kfree(to_mdio_device(dev)); | ||
| } | ||
|
|
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| struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr) | ||
| { | ||
| struct mdio_device *mdiodev; | ||
|
|
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| /* We allocate the device, and initialize the default values */ | ||
| mdiodev = kzalloc(sizeof(*mdiodev), GFP_KERNEL); | ||
| if (!mdiodev) | ||
| return ERR_PTR(-ENOMEM); | ||
|
|
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| mdiodev->dev.release = mdio_device_release; | ||
| mdiodev->dev.parent = &bus->dev; | ||
| mdiodev->dev.bus = &mdio_bus_type; | ||
| mdiodev->bus = bus; | ||
| mdiodev->addr = addr; | ||
|
|
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| dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); | ||
|
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| device_initialize(&mdiodev->dev); | ||
|
|
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| return mdiodev; | ||
| } | ||
| EXPORT_SYMBOL(mdio_device_create); | ||
|
|
||
| /** | ||
| * mdio_device_register - Register the mdio device on the MDIO bus | ||
| * @mdiodev: mdio_device structure to be added to the MDIO bus | ||
| */ | ||
| int mdio_device_register(struct mdio_device *mdiodev) | ||
| { | ||
| int err; | ||
|
|
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| dev_info(&mdiodev->dev, "mdio_device_register\n"); | ||
|
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| err = mdiobus_register_device(mdiodev); | ||
| if (err) | ||
| return err; | ||
|
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| err = device_add(&mdiodev->dev); | ||
| if (err) { | ||
| pr_err("MDIO %d failed to add\n", mdiodev->addr); | ||
| goto out; | ||
| } | ||
|
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| return 0; | ||
|
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| out: | ||
| mdiobus_unregister_device(mdiodev); | ||
| return err; | ||
| } | ||
| EXPORT_SYMBOL(mdio_device_register); | ||
|
|
||
| /** | ||
| * mdio_device_remove - Remove a previously registered mdio device from the | ||
| * MDIO bus | ||
| * @mdiodev: mdio_device structure to remove | ||
| * | ||
| * This doesn't free the mdio_device itself, it merely reverses the effects | ||
| * of mdio_device_register(). Use mdio_device_free() to free the device | ||
| * after calling this function. | ||
| */ | ||
| void mdio_device_remove(struct mdio_device *mdiodev) | ||
| { | ||
| device_del(&mdiodev->dev); | ||
| mdiobus_unregister_device(mdiodev); | ||
| } | ||
| EXPORT_SYMBOL(mdio_device_remove); | ||
|
|
||
| /** | ||
| * mdio_probe - probe an MDIO device | ||
| * @dev: device to probe | ||
| * | ||
| * Description: Take care of setting up the mdio_device structure | ||
| * and calling the driver to probe the device. | ||
| */ | ||
| static int mdio_probe(struct device *dev) | ||
| { | ||
| struct mdio_device *mdiodev = to_mdio_device(dev); | ||
| struct device_driver *drv = mdiodev->dev.driver; | ||
| struct mdio_driver *mdiodrv = to_mdio_driver(drv); | ||
| int err = 0; | ||
|
|
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| if (mdiodrv->probe) | ||
| err = mdiodrv->probe(mdiodev); | ||
|
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| return err; | ||
| } | ||
|
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| static int mdio_remove(struct device *dev) | ||
| { | ||
| struct mdio_device *mdiodev = to_mdio_device(dev); | ||
| struct device_driver *drv = mdiodev->dev.driver; | ||
| struct mdio_driver *mdiodrv = to_mdio_driver(drv); | ||
|
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| if (mdiodrv->remove) | ||
| mdiodrv->remove(mdiodev); | ||
|
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| return 0; | ||
| } | ||
|
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| /** | ||
| * mdio_driver_register - register an mdio_driver with the MDIO layer | ||
| * @new_driver: new mdio_driver to register | ||
| */ | ||
| int mdio_driver_register(struct mdio_driver *drv) | ||
| { | ||
| struct mdio_driver_common *mdiodrv = &drv->mdiodrv; | ||
| int retval; | ||
|
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| pr_info("mdio_driver_register: %s\n", mdiodrv->driver.name); | ||
|
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| mdiodrv->driver.bus = &mdio_bus_type; | ||
| mdiodrv->driver.probe = mdio_probe; | ||
| mdiodrv->driver.remove = mdio_remove; | ||
|
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| retval = driver_register(&mdiodrv->driver); | ||
| if (retval) { | ||
| pr_err("%s: Error %d in registering driver\n", | ||
| mdiodrv->driver.name, retval); | ||
|
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| return retval; | ||
| } | ||
|
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| return 0; | ||
| } | ||
| EXPORT_SYMBOL(mdio_driver_register); | ||
|
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| void mdio_driver_unregister(struct mdio_driver *drv) | ||
| { | ||
| struct mdio_driver_common *mdiodrv = &drv->mdiodrv; | ||
|
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| driver_unregister(&mdiodrv->driver); | ||
| } | ||
| EXPORT_SYMBOL(mdio_driver_unregister); |
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