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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d5bf9071e7
If registering of one of them fails, all already registered drivers of this module will be unregistered. Use the new register/unregister functions in all drivers registering more than one driver. amd.c, realtek.c: Simplify: directly return registration result. Tested with broadcom.c All others compile-tested. Signed-off-by: Christian Hohnstaedt <chohnstaedt@innominate.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1149 lines
28 KiB
C
1149 lines
28 KiB
C
/*
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* drivers/net/phy/phy_device.c
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*
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* Framework for finding and configuring PHYs.
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* Also contains generic PHY driver
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*
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* Author: Andy Fleming
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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MODULE_DESCRIPTION("PHY library");
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MODULE_AUTHOR("Andy Fleming");
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MODULE_LICENSE("GPL");
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void phy_device_free(struct phy_device *phydev)
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{
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kfree(phydev);
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}
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EXPORT_SYMBOL(phy_device_free);
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static void phy_device_release(struct device *dev)
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{
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phy_device_free(to_phy_device(dev));
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}
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static struct phy_driver genphy_driver;
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extern int mdio_bus_init(void);
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extern void mdio_bus_exit(void);
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static LIST_HEAD(phy_fixup_list);
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static DEFINE_MUTEX(phy_fixup_lock);
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static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
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u32 flags, phy_interface_t interface);
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/*
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* Creates a new phy_fixup and adds it to the list
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* @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID)
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* @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
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* It can also be PHY_ANY_UID
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* @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
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* comparison
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* @run: The actual code to be run when a matching PHY is found
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*/
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int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
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int (*run)(struct phy_device *))
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{
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struct phy_fixup *fixup;
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fixup = kzalloc(sizeof(struct phy_fixup), GFP_KERNEL);
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if (!fixup)
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return -ENOMEM;
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strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
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fixup->phy_uid = phy_uid;
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fixup->phy_uid_mask = phy_uid_mask;
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fixup->run = run;
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mutex_lock(&phy_fixup_lock);
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list_add_tail(&fixup->list, &phy_fixup_list);
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mutex_unlock(&phy_fixup_lock);
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return 0;
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}
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EXPORT_SYMBOL(phy_register_fixup);
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/* Registers a fixup to be run on any PHY with the UID in phy_uid */
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int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
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int (*run)(struct phy_device *))
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{
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return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
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}
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EXPORT_SYMBOL(phy_register_fixup_for_uid);
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/* Registers a fixup to be run on the PHY with id string bus_id */
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int phy_register_fixup_for_id(const char *bus_id,
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int (*run)(struct phy_device *))
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{
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return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
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}
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EXPORT_SYMBOL(phy_register_fixup_for_id);
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/*
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* Returns 1 if fixup matches phydev in bus_id and phy_uid.
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* Fixups can be set to match any in one or more fields.
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*/
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static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
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{
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if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0)
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if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
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return 0;
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if ((fixup->phy_uid & fixup->phy_uid_mask) !=
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(phydev->phy_id & fixup->phy_uid_mask))
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if (fixup->phy_uid != PHY_ANY_UID)
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return 0;
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return 1;
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}
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/* Runs any matching fixups for this phydev */
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int phy_scan_fixups(struct phy_device *phydev)
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{
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struct phy_fixup *fixup;
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mutex_lock(&phy_fixup_lock);
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list_for_each_entry(fixup, &phy_fixup_list, list) {
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if (phy_needs_fixup(phydev, fixup)) {
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int err;
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err = fixup->run(phydev);
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if (err < 0) {
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mutex_unlock(&phy_fixup_lock);
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return err;
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}
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}
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}
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mutex_unlock(&phy_fixup_lock);
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return 0;
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}
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EXPORT_SYMBOL(phy_scan_fixups);
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struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
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bool is_c45, struct phy_c45_device_ids *c45_ids)
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{
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struct phy_device *dev;
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/* We allocate the device, and initialize the
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* default values */
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (NULL == dev)
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return (struct phy_device*) PTR_ERR((void*)-ENOMEM);
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dev->dev.release = phy_device_release;
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dev->speed = 0;
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dev->duplex = -1;
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dev->pause = dev->asym_pause = 0;
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dev->link = 1;
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dev->interface = PHY_INTERFACE_MODE_GMII;
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dev->autoneg = AUTONEG_ENABLE;
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dev->is_c45 = is_c45;
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dev->addr = addr;
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dev->phy_id = phy_id;
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if (c45_ids)
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dev->c45_ids = *c45_ids;
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dev->bus = bus;
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dev->dev.parent = bus->parent;
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dev->dev.bus = &mdio_bus_type;
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dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
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dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);
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dev->state = PHY_DOWN;
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mutex_init(&dev->lock);
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INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
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/* Request the appropriate module unconditionally; don't
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bother trying to do so only if it isn't already loaded,
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because that gets complicated. A hotplug event would have
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done an unconditional modprobe anyway.
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We don't do normal hotplug because it won't work for MDIO
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-- because it relies on the device staying around for long
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enough for the driver to get loaded. With MDIO, the NIC
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driver will get bored and give up as soon as it finds that
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there's no driver _already_ loaded. */
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request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
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return dev;
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}
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EXPORT_SYMBOL(phy_device_create);
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/**
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* get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @phy_id: where to store the ID retrieved.
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* @c45_ids: where to store the c45 ID information.
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*
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* If the PHY devices-in-package appears to be valid, it and the
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* corresponding identifiers are stored in @c45_ids, zero is stored
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* in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
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* zero on success.
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*
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*/
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static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
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struct phy_c45_device_ids *c45_ids) {
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int phy_reg;
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int i, reg_addr;
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const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
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/* Find first non-zero Devices In package. Device
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* zero is reserved, so don't probe it.
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*/
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for (i = 1;
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i < num_ids && c45_ids->devices_in_package == 0;
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i++) {
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reg_addr = MII_ADDR_C45 | i << 16 | 6;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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c45_ids->devices_in_package = (phy_reg & 0xffff) << 16;
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reg_addr = MII_ADDR_C45 | i << 16 | 5;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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c45_ids->devices_in_package |= (phy_reg & 0xffff);
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/* If mostly Fs, there is no device there,
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* let's get out of here.
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*/
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if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) {
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*phy_id = 0xffffffff;
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return 0;
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}
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}
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/* Now probe Device Identifiers for each device present. */
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for (i = 1; i < num_ids; i++) {
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if (!(c45_ids->devices_in_package & (1 << i)))
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continue;
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reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
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reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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c45_ids->device_ids[i] |= (phy_reg & 0xffff);
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}
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*phy_id = 0;
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return 0;
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}
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/**
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* get_phy_id - reads the specified addr for its ID.
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @phy_id: where to store the ID retrieved.
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* @is_c45: If true the PHY uses the 802.3 clause 45 protocol
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* @c45_ids: where to store the c45 ID information.
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*
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* Description: In the case of a 802.3-c22 PHY, reads the ID registers
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* of the PHY at @addr on the @bus, stores it in @phy_id and returns
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* zero on success.
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*
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* In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
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* its return value is in turn returned.
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*
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*/
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static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
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bool is_c45, struct phy_c45_device_ids *c45_ids)
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{
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int phy_reg;
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if (is_c45)
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return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
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/* Grab the bits from PHYIR1, and put them
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* in the upper half */
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phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
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if (phy_reg < 0)
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return -EIO;
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*phy_id = (phy_reg & 0xffff) << 16;
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/* Grab the bits from PHYIR2, and put them in the lower half */
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phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
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if (phy_reg < 0)
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return -EIO;
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*phy_id |= (phy_reg & 0xffff);
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return 0;
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}
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/**
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* get_phy_device - reads the specified PHY device and returns its @phy_device struct
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @is_c45: If true the PHY uses the 802.3 clause 45 protocol
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*
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* Description: Reads the ID registers of the PHY at @addr on the
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* @bus, then allocates and returns the phy_device to represent it.
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*/
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struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
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{
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struct phy_c45_device_ids c45_ids = {0};
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struct phy_device *dev = NULL;
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u32 phy_id = 0;
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int r;
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r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
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if (r)
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return ERR_PTR(r);
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/* If the phy_id is mostly Fs, there is no device there */
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if ((phy_id & 0x1fffffff) == 0x1fffffff)
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return NULL;
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dev = phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
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return dev;
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}
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EXPORT_SYMBOL(get_phy_device);
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/**
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* phy_device_register - Register the phy device on the MDIO bus
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* @phydev: phy_device structure to be added to the MDIO bus
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*/
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int phy_device_register(struct phy_device *phydev)
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{
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int err;
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/* Don't register a phy if one is already registered at this
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* address */
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if (phydev->bus->phy_map[phydev->addr])
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return -EINVAL;
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phydev->bus->phy_map[phydev->addr] = phydev;
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/* Run all of the fixups for this PHY */
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phy_scan_fixups(phydev);
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err = device_register(&phydev->dev);
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if (err) {
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pr_err("phy %d failed to register\n", phydev->addr);
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goto out;
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}
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return 0;
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out:
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phydev->bus->phy_map[phydev->addr] = NULL;
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return err;
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}
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EXPORT_SYMBOL(phy_device_register);
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/**
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* phy_find_first - finds the first PHY device on the bus
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* @bus: the target MII bus
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*/
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struct phy_device *phy_find_first(struct mii_bus *bus)
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{
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int addr;
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for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
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if (bus->phy_map[addr])
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return bus->phy_map[addr];
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}
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return NULL;
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}
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EXPORT_SYMBOL(phy_find_first);
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/**
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* phy_prepare_link - prepares the PHY layer to monitor link status
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* @phydev: target phy_device struct
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* @handler: callback function for link status change notifications
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*
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* Description: Tells the PHY infrastructure to handle the
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* gory details on monitoring link status (whether through
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* polling or an interrupt), and to call back to the
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* connected device driver when the link status changes.
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* If you want to monitor your own link state, don't call
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* this function.
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*/
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static void phy_prepare_link(struct phy_device *phydev,
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void (*handler)(struct net_device *))
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{
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phydev->adjust_link = handler;
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}
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/**
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* phy_connect_direct - connect an ethernet device to a specific phy_device
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* @dev: the network device to connect
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* @phydev: the pointer to the phy device
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* @handler: callback function for state change notifications
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* @flags: PHY device's dev_flags
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* @interface: PHY device's interface
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*/
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int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
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void (*handler)(struct net_device *), u32 flags,
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phy_interface_t interface)
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{
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int rc;
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rc = phy_attach_direct(dev, phydev, flags, interface);
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if (rc)
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return rc;
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phy_prepare_link(phydev, handler);
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phy_start_machine(phydev, NULL);
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if (phydev->irq > 0)
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phy_start_interrupts(phydev);
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return 0;
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}
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EXPORT_SYMBOL(phy_connect_direct);
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/**
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* phy_connect - connect an ethernet device to a PHY device
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* @dev: the network device to connect
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* @bus_id: the id string of the PHY device to connect
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* @handler: callback function for state change notifications
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* @flags: PHY device's dev_flags
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* @interface: PHY device's interface
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*
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* Description: Convenience function for connecting ethernet
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* devices to PHY devices. The default behavior is for
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* the PHY infrastructure to handle everything, and only notify
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* the connected driver when the link status changes. If you
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* don't want, or can't use the provided functionality, you may
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* choose to call only the subset of functions which provide
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* the desired functionality.
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*/
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struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
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void (*handler)(struct net_device *), u32 flags,
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phy_interface_t interface)
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{
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struct phy_device *phydev;
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struct device *d;
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int rc;
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|
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/* Search the list of PHY devices on the mdio bus for the
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* PHY with the requested name */
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d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
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if (!d) {
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pr_err("PHY %s not found\n", bus_id);
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return ERR_PTR(-ENODEV);
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}
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phydev = to_phy_device(d);
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|
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rc = phy_connect_direct(dev, phydev, handler, flags, interface);
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if (rc)
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return ERR_PTR(rc);
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return phydev;
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}
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EXPORT_SYMBOL(phy_connect);
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|
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/**
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* phy_disconnect - disable interrupts, stop state machine, and detach a PHY device
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* @phydev: target phy_device struct
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*/
|
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void phy_disconnect(struct phy_device *phydev)
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{
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if (phydev->irq > 0)
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phy_stop_interrupts(phydev);
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|
|
phy_stop_machine(phydev);
|
|
|
|
phydev->adjust_link = NULL;
|
|
|
|
phy_detach(phydev);
|
|
}
|
|
EXPORT_SYMBOL(phy_disconnect);
|
|
|
|
int phy_init_hw(struct phy_device *phydev)
|
|
{
|
|
int ret;
|
|
|
|
if (!phydev->drv || !phydev->drv->config_init)
|
|
return 0;
|
|
|
|
ret = phy_scan_fixups(phydev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return phydev->drv->config_init(phydev);
|
|
}
|
|
|
|
/**
|
|
* phy_attach_direct - attach a network device to a given PHY device pointer
|
|
* @dev: network device to attach
|
|
* @phydev: Pointer to phy_device to attach
|
|
* @flags: PHY device's dev_flags
|
|
* @interface: PHY device's interface
|
|
*
|
|
* Description: Called by drivers to attach to a particular PHY
|
|
* device. The phy_device is found, and properly hooked up
|
|
* to the phy_driver. If no driver is attached, then the
|
|
* genphy_driver is used. The phy_device is given a ptr to
|
|
* the attaching device, and given a callback for link status
|
|
* change. The phy_device is returned to the attaching driver.
|
|
*/
|
|
static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
|
|
u32 flags, phy_interface_t interface)
|
|
{
|
|
struct device *d = &phydev->dev;
|
|
int err;
|
|
|
|
/* Assume that if there is no driver, that it doesn't
|
|
* exist, and we should use the genphy driver. */
|
|
if (NULL == d->driver) {
|
|
if (phydev->is_c45) {
|
|
pr_err("No driver for phy %x\n", phydev->phy_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
d->driver = &genphy_driver.driver;
|
|
|
|
err = d->driver->probe(d);
|
|
if (err >= 0)
|
|
err = device_bind_driver(d);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (phydev->attached_dev) {
|
|
dev_err(&dev->dev, "PHY already attached\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
phydev->attached_dev = dev;
|
|
dev->phydev = phydev;
|
|
|
|
phydev->dev_flags = flags;
|
|
|
|
phydev->interface = interface;
|
|
|
|
phydev->state = PHY_READY;
|
|
|
|
/* Do initial configuration here, now that
|
|
* we have certain key parameters
|
|
* (dev_flags and interface) */
|
|
err = phy_init_hw(phydev);
|
|
if (err)
|
|
phy_detach(phydev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* phy_attach - attach a network device to a particular PHY device
|
|
* @dev: network device to attach
|
|
* @bus_id: Bus ID of PHY device to attach
|
|
* @flags: PHY device's dev_flags
|
|
* @interface: PHY device's interface
|
|
*
|
|
* Description: Same as phy_attach_direct() except that a PHY bus_id
|
|
* string is passed instead of a pointer to a struct phy_device.
|
|
*/
|
|
struct phy_device *phy_attach(struct net_device *dev,
|
|
const char *bus_id, u32 flags, phy_interface_t interface)
|
|
{
|
|
struct bus_type *bus = &mdio_bus_type;
|
|
struct phy_device *phydev;
|
|
struct device *d;
|
|
int rc;
|
|
|
|
/* Search the list of PHY devices on the mdio bus for the
|
|
* PHY with the requested name */
|
|
d = bus_find_device_by_name(bus, NULL, bus_id);
|
|
if (!d) {
|
|
pr_err("PHY %s not found\n", bus_id);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
phydev = to_phy_device(d);
|
|
|
|
rc = phy_attach_direct(dev, phydev, flags, interface);
|
|
if (rc)
|
|
return ERR_PTR(rc);
|
|
|
|
return phydev;
|
|
}
|
|
EXPORT_SYMBOL(phy_attach);
|
|
|
|
/**
|
|
* phy_detach - detach a PHY device from its network device
|
|
* @phydev: target phy_device struct
|
|
*/
|
|
void phy_detach(struct phy_device *phydev)
|
|
{
|
|
phydev->attached_dev->phydev = NULL;
|
|
phydev->attached_dev = NULL;
|
|
|
|
/* If the device had no specific driver before (i.e. - it
|
|
* was using the generic driver), we unbind the device
|
|
* from the generic driver so that there's a chance a
|
|
* real driver could be loaded */
|
|
if (phydev->dev.driver == &genphy_driver.driver)
|
|
device_release_driver(&phydev->dev);
|
|
}
|
|
EXPORT_SYMBOL(phy_detach);
|
|
|
|
|
|
/* Generic PHY support and helper functions */
|
|
|
|
/**
|
|
* genphy_config_advert - sanitize and advertise auto-negotiation parameters
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: Writes MII_ADVERTISE with the appropriate values,
|
|
* after sanitizing the values to make sure we only advertise
|
|
* what is supported. Returns < 0 on error, 0 if the PHY's advertisement
|
|
* hasn't changed, and > 0 if it has changed.
|
|
*/
|
|
static int genphy_config_advert(struct phy_device *phydev)
|
|
{
|
|
u32 advertise;
|
|
int oldadv, adv;
|
|
int err, changed = 0;
|
|
|
|
/* Only allow advertising what
|
|
* this PHY supports */
|
|
phydev->advertising &= phydev->supported;
|
|
advertise = phydev->advertising;
|
|
|
|
/* Setup standard advertisement */
|
|
oldadv = adv = phy_read(phydev, MII_ADVERTISE);
|
|
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
|
|
ADVERTISE_PAUSE_ASYM);
|
|
adv |= ethtool_adv_to_mii_adv_t(advertise);
|
|
|
|
if (adv != oldadv) {
|
|
err = phy_write(phydev, MII_ADVERTISE, adv);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
changed = 1;
|
|
}
|
|
|
|
/* Configure gigabit if it's supported */
|
|
if (phydev->supported & (SUPPORTED_1000baseT_Half |
|
|
SUPPORTED_1000baseT_Full)) {
|
|
oldadv = adv = phy_read(phydev, MII_CTRL1000);
|
|
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
|
|
adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
|
|
|
|
if (adv != oldadv) {
|
|
err = phy_write(phydev, MII_CTRL1000, adv);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
changed = 1;
|
|
}
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* genphy_setup_forced - configures/forces speed/duplex from @phydev
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: Configures MII_BMCR to force speed/duplex
|
|
* to the values in phydev. Assumes that the values are valid.
|
|
* Please see phy_sanitize_settings().
|
|
*/
|
|
static int genphy_setup_forced(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
int ctl = 0;
|
|
|
|
phydev->pause = phydev->asym_pause = 0;
|
|
|
|
if (SPEED_1000 == phydev->speed)
|
|
ctl |= BMCR_SPEED1000;
|
|
else if (SPEED_100 == phydev->speed)
|
|
ctl |= BMCR_SPEED100;
|
|
|
|
if (DUPLEX_FULL == phydev->duplex)
|
|
ctl |= BMCR_FULLDPLX;
|
|
|
|
err = phy_write(phydev, MII_BMCR, ctl);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/**
|
|
* genphy_restart_aneg - Enable and Restart Autonegotiation
|
|
* @phydev: target phy_device struct
|
|
*/
|
|
int genphy_restart_aneg(struct phy_device *phydev)
|
|
{
|
|
int ctl;
|
|
|
|
ctl = phy_read(phydev, MII_BMCR);
|
|
|
|
if (ctl < 0)
|
|
return ctl;
|
|
|
|
ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
|
|
|
|
/* Don't isolate the PHY if we're negotiating */
|
|
ctl &= ~(BMCR_ISOLATE);
|
|
|
|
ctl = phy_write(phydev, MII_BMCR, ctl);
|
|
|
|
return ctl;
|
|
}
|
|
EXPORT_SYMBOL(genphy_restart_aneg);
|
|
|
|
|
|
/**
|
|
* genphy_config_aneg - restart auto-negotiation or write BMCR
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: If auto-negotiation is enabled, we configure the
|
|
* advertising, and then restart auto-negotiation. If it is not
|
|
* enabled, then we write the BMCR.
|
|
*/
|
|
int genphy_config_aneg(struct phy_device *phydev)
|
|
{
|
|
int result;
|
|
|
|
if (AUTONEG_ENABLE != phydev->autoneg)
|
|
return genphy_setup_forced(phydev);
|
|
|
|
result = genphy_config_advert(phydev);
|
|
|
|
if (result < 0) /* error */
|
|
return result;
|
|
|
|
if (result == 0) {
|
|
/* Advertisement hasn't changed, but maybe aneg was never on to
|
|
* begin with? Or maybe phy was isolated? */
|
|
int ctl = phy_read(phydev, MII_BMCR);
|
|
|
|
if (ctl < 0)
|
|
return ctl;
|
|
|
|
if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
|
|
result = 1; /* do restart aneg */
|
|
}
|
|
|
|
/* Only restart aneg if we are advertising something different
|
|
* than we were before. */
|
|
if (result > 0)
|
|
result = genphy_restart_aneg(phydev);
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(genphy_config_aneg);
|
|
|
|
/**
|
|
* genphy_update_link - update link status in @phydev
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: Update the value in phydev->link to reflect the
|
|
* current link value. In order to do this, we need to read
|
|
* the status register twice, keeping the second value.
|
|
*/
|
|
int genphy_update_link(struct phy_device *phydev)
|
|
{
|
|
int status;
|
|
|
|
/* Do a fake read */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
|
|
if (status < 0)
|
|
return status;
|
|
|
|
/* Read link and autonegotiation status */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
|
|
if (status < 0)
|
|
return status;
|
|
|
|
if ((status & BMSR_LSTATUS) == 0)
|
|
phydev->link = 0;
|
|
else
|
|
phydev->link = 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_update_link);
|
|
|
|
/**
|
|
* genphy_read_status - check the link status and update current link state
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: Check the link, then figure out the current state
|
|
* by comparing what we advertise with what the link partner
|
|
* advertises. Start by checking the gigabit possibilities,
|
|
* then move on to 10/100.
|
|
*/
|
|
int genphy_read_status(struct phy_device *phydev)
|
|
{
|
|
int adv;
|
|
int err;
|
|
int lpa;
|
|
int lpagb = 0;
|
|
|
|
/* Update the link, but return if there
|
|
* was an error */
|
|
err = genphy_update_link(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (AUTONEG_ENABLE == phydev->autoneg) {
|
|
if (phydev->supported & (SUPPORTED_1000baseT_Half
|
|
| SUPPORTED_1000baseT_Full)) {
|
|
lpagb = phy_read(phydev, MII_STAT1000);
|
|
|
|
if (lpagb < 0)
|
|
return lpagb;
|
|
|
|
adv = phy_read(phydev, MII_CTRL1000);
|
|
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
lpagb &= adv << 2;
|
|
}
|
|
|
|
lpa = phy_read(phydev, MII_LPA);
|
|
|
|
if (lpa < 0)
|
|
return lpa;
|
|
|
|
adv = phy_read(phydev, MII_ADVERTISE);
|
|
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
lpa &= adv;
|
|
|
|
phydev->speed = SPEED_10;
|
|
phydev->duplex = DUPLEX_HALF;
|
|
phydev->pause = phydev->asym_pause = 0;
|
|
|
|
if (lpagb & (LPA_1000FULL | LPA_1000HALF)) {
|
|
phydev->speed = SPEED_1000;
|
|
|
|
if (lpagb & LPA_1000FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
} else if (lpa & (LPA_100FULL | LPA_100HALF)) {
|
|
phydev->speed = SPEED_100;
|
|
|
|
if (lpa & LPA_100FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
} else
|
|
if (lpa & LPA_10FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
|
|
if (phydev->duplex == DUPLEX_FULL){
|
|
phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
|
|
phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
|
|
}
|
|
} else {
|
|
int bmcr = phy_read(phydev, MII_BMCR);
|
|
if (bmcr < 0)
|
|
return bmcr;
|
|
|
|
if (bmcr & BMCR_FULLDPLX)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
else
|
|
phydev->duplex = DUPLEX_HALF;
|
|
|
|
if (bmcr & BMCR_SPEED1000)
|
|
phydev->speed = SPEED_1000;
|
|
else if (bmcr & BMCR_SPEED100)
|
|
phydev->speed = SPEED_100;
|
|
else
|
|
phydev->speed = SPEED_10;
|
|
|
|
phydev->pause = phydev->asym_pause = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_read_status);
|
|
|
|
static int genphy_config_init(struct phy_device *phydev)
|
|
{
|
|
int val;
|
|
u32 features;
|
|
|
|
/* For now, I'll claim that the generic driver supports
|
|
* all possible port types */
|
|
features = (SUPPORTED_TP | SUPPORTED_MII
|
|
| SUPPORTED_AUI | SUPPORTED_FIBRE |
|
|
SUPPORTED_BNC);
|
|
|
|
/* Do we support autonegotiation? */
|
|
val = phy_read(phydev, MII_BMSR);
|
|
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & BMSR_ANEGCAPABLE)
|
|
features |= SUPPORTED_Autoneg;
|
|
|
|
if (val & BMSR_100FULL)
|
|
features |= SUPPORTED_100baseT_Full;
|
|
if (val & BMSR_100HALF)
|
|
features |= SUPPORTED_100baseT_Half;
|
|
if (val & BMSR_10FULL)
|
|
features |= SUPPORTED_10baseT_Full;
|
|
if (val & BMSR_10HALF)
|
|
features |= SUPPORTED_10baseT_Half;
|
|
|
|
if (val & BMSR_ESTATEN) {
|
|
val = phy_read(phydev, MII_ESTATUS);
|
|
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & ESTATUS_1000_TFULL)
|
|
features |= SUPPORTED_1000baseT_Full;
|
|
if (val & ESTATUS_1000_THALF)
|
|
features |= SUPPORTED_1000baseT_Half;
|
|
}
|
|
|
|
phydev->supported = features;
|
|
phydev->advertising = features;
|
|
|
|
return 0;
|
|
}
|
|
int genphy_suspend(struct phy_device *phydev)
|
|
{
|
|
int value;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
value = phy_read(phydev, MII_BMCR);
|
|
phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN));
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_suspend);
|
|
|
|
int genphy_resume(struct phy_device *phydev)
|
|
{
|
|
int value;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
value = phy_read(phydev, MII_BMCR);
|
|
phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN));
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_resume);
|
|
|
|
/**
|
|
* phy_probe - probe and init a PHY device
|
|
* @dev: device to probe and init
|
|
*
|
|
* Description: Take care of setting up the phy_device structure,
|
|
* set the state to READY (the driver's init function should
|
|
* set it to STARTING if needed).
|
|
*/
|
|
static int phy_probe(struct device *dev)
|
|
{
|
|
struct phy_device *phydev;
|
|
struct phy_driver *phydrv;
|
|
struct device_driver *drv;
|
|
int err = 0;
|
|
|
|
phydev = to_phy_device(dev);
|
|
|
|
drv = phydev->dev.driver;
|
|
phydrv = to_phy_driver(drv);
|
|
phydev->drv = phydrv;
|
|
|
|
/* Disable the interrupt if the PHY doesn't support it */
|
|
if (!(phydrv->flags & PHY_HAS_INTERRUPT))
|
|
phydev->irq = PHY_POLL;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
/* Start out supporting everything. Eventually,
|
|
* a controller will attach, and may modify one
|
|
* or both of these values */
|
|
phydev->supported = phydrv->features;
|
|
phydev->advertising = phydrv->features;
|
|
|
|
/* Set the state to READY by default */
|
|
phydev->state = PHY_READY;
|
|
|
|
if (phydev->drv->probe)
|
|
err = phydev->drv->probe(phydev);
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
static int phy_remove(struct device *dev)
|
|
{
|
|
struct phy_device *phydev;
|
|
|
|
phydev = to_phy_device(dev);
|
|
|
|
mutex_lock(&phydev->lock);
|
|
phydev->state = PHY_DOWN;
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
if (phydev->drv->remove)
|
|
phydev->drv->remove(phydev);
|
|
phydev->drv = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* phy_driver_register - register a phy_driver with the PHY layer
|
|
* @new_driver: new phy_driver to register
|
|
*/
|
|
int phy_driver_register(struct phy_driver *new_driver)
|
|
{
|
|
int retval;
|
|
|
|
new_driver->driver.name = new_driver->name;
|
|
new_driver->driver.bus = &mdio_bus_type;
|
|
new_driver->driver.probe = phy_probe;
|
|
new_driver->driver.remove = phy_remove;
|
|
|
|
retval = driver_register(&new_driver->driver);
|
|
|
|
if (retval) {
|
|
pr_err("%s: Error %d in registering driver\n",
|
|
new_driver->name, retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
pr_debug("%s: Registered new driver\n", new_driver->name);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(phy_driver_register);
|
|
|
|
int phy_drivers_register(struct phy_driver *new_driver, int n)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
ret = phy_driver_register(new_driver + i);
|
|
if (ret) {
|
|
while (i-- > 0)
|
|
phy_driver_unregister(new_driver + i);
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(phy_drivers_register);
|
|
|
|
void phy_driver_unregister(struct phy_driver *drv)
|
|
{
|
|
driver_unregister(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(phy_driver_unregister);
|
|
|
|
void phy_drivers_unregister(struct phy_driver *drv, int n)
|
|
{
|
|
int i;
|
|
for (i = 0; i < n; i++) {
|
|
phy_driver_unregister(drv + i);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(phy_drivers_unregister);
|
|
|
|
static struct phy_driver genphy_driver = {
|
|
.phy_id = 0xffffffff,
|
|
.phy_id_mask = 0xffffffff,
|
|
.name = "Generic PHY",
|
|
.config_init = genphy_config_init,
|
|
.features = 0,
|
|
.config_aneg = genphy_config_aneg,
|
|
.read_status = genphy_read_status,
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
.driver = {.owner= THIS_MODULE, },
|
|
};
|
|
|
|
static int __init phy_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = mdio_bus_init();
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = phy_driver_register(&genphy_driver);
|
|
if (rc)
|
|
mdio_bus_exit();
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit phy_exit(void)
|
|
{
|
|
phy_driver_unregister(&genphy_driver);
|
|
mdio_bus_exit();
|
|
}
|
|
|
|
subsys_initcall(phy_init);
|
|
module_exit(phy_exit);
|