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NetBSD/sys/dev/mii/smscphy.c

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Add missing RCSID and __KERNEL_RCSID().
2021-08-26 00:50:29 +03:00
/* $NetBSD: smscphy.c,v 1.4 2021/08/25 21:50:29 andvar Exp $ */
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Benno Rice. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* $FreeBSD: head/sys/dev/mii/smscphy.c 326255 2017-11-27 14:52:40Z pfg $ */
/*
* Driver for the SMSC LAN8710A
*/
Add missing RCSID and __KERNEL_RCSID().
2021-08-26 00:50:29 +03:00
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smscphy.c,v 1.4 2021/08/25 21:50:29 andvar Exp $");
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
/* PHY special control/status register */
#define SMSCPHY_SPCSR 0x1f
#define SPCSR_SPDIND_10 0x0004
#define SPCSR_SPDIND_100 0x0008
#define SPCSR_SPDIND_SPDMASK 0x000c
#define SPCSR_SPDIND_FDX 0x0010
static int smscphy_match(device_t, cfdata_t, void *);
static void smscphy_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(smscphy, sizeof (struct mii_softc),
smscphy_match, smscphy_attach, mii_phy_detach, mii_phy_activate);
static void smscphy_power(struct mii_softc *, bool);
static int smscphy_service(struct mii_softc *, struct mii_data *, int);
static void smscphy_auto(struct mii_softc *, int);
static void smscphy_status(struct mii_softc *);
static const struct mii_phydesc smscphys[] = {
MII_PHY_DESC(SMSC, LAN8700),
MII_PHY_DESC(SMSC, LAN8710_LAN8720),
MII_PHY_END
};
static const struct mii_phy_funcs smscphy_funcs = {
smscphy_service,
smscphy_status,
mii_phy_reset
};
static int
smscphy_match(device_t dev, cfdata_t match, void *aux)
{
struct mii_attach_args *ma = aux;
if (mii_phy_match(ma, smscphys) != NULL)
return 10;
return 0;
}
static void
smscphy_attach(device_t parent, device_t self, void *aux)
{
struct mii_softc *sc = device_private(self);
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
const struct mii_phydesc *mpd;
mpd = mii_phy_match(ma, smscphys);
aprint_naive(": Media interface\n");
aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
sc->mii_dev = self;
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_funcs = &smscphy_funcs;
sc->mii_mpd_oui = MII_OUI(ma->mii_id1, ma->mii_id2);
sc->mii_mpd_model = MII_MODEL(ma->mii_id2);
sc->mii_mpd_rev = MII_REV(ma->mii_id2);
sc->mii_pdata = mii;
sc->mii_flags = ma->mii_flags;
Define and implement a locking protocol for the ifmedia / mii layers: - MP-safe drivers provide a mutex to ifmedia that is used to serialize access to media-related structures / hardware regsiters. Converted drivers use the new ifmedia_init_with_lock() function for this. The new name is provided to ease the transition. - Un-converted drivers continue to call ifmedia_init(), which will supply a compatibility lock to be used instead. Several media-related entry points must be aware of this compatibility lock, and are able to acquire it recursively a limited number of times, if needed. This is a SPIN mutex with priority IPL_NET. - This same lock is used to serialize access to PHY registers and other MII-related data structures. The PHY drivers are modified to acquire and release the lock, as needed, and assert the lock is held as a diagnostic aid. The "usbnet" framework has had an overhaul of its internal locking protocols to fit in with the media / mii changes, and the drivers adapted. USB wifi drivers have been changed to provide their own adaptive mutex to the ifmedia later via a new ieee80211_media_init_with_lock() function. This is required because the USB drivers need an adaptive mutex. Besised "usbnet", a few other drivers are converted: vmx, wm, ixgbe / ixv. mcx also now calls ifmedia_init_with_lock() because it needs to also use an adaptive mutex. The mcx driver still needs to be fully converted to NET_MPSAFE.
2020-03-16 02:04:50 +03:00
mii_lock(mii);
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
PHY_RESET(sc);
PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
sc->mii_capabilities &= ma->mii_capmask;
- Simplify sc->mii_anegticks setting. Same as FreeBSD. Don't set the default value not in the attach function. Instead, set the default value (MII_ANEGTICKS) first in the beginning of the mii_phy_add_media(). The function already has the code to change the value to MII_ANEGTICKS_GIGE if it's gigabit capable. - Remove extra pmf_device_register() call. It's done in mii_phy_add_media().
2019-11-27 13:19:20 +03:00
Define and implement a locking protocol for the ifmedia / mii layers: - MP-safe drivers provide a mutex to ifmedia that is used to serialize access to media-related structures / hardware regsiters. Converted drivers use the new ifmedia_init_with_lock() function for this. The new name is provided to ease the transition. - Un-converted drivers continue to call ifmedia_init(), which will supply a compatibility lock to be used instead. Several media-related entry points must be aware of this compatibility lock, and are able to acquire it recursively a limited number of times, if needed. This is a SPIN mutex with priority IPL_NET. - This same lock is used to serialize access to PHY registers and other MII-related data structures. The PHY drivers are modified to acquire and release the lock, as needed, and assert the lock is held as a diagnostic aid. The "usbnet" framework has had an overhaul of its internal locking protocols to fit in with the media / mii changes, and the drivers adapted. USB wifi drivers have been changed to provide their own adaptive mutex to the ifmedia later via a new ieee80211_media_init_with_lock() function. This is required because the USB drivers need an adaptive mutex. Besised "usbnet", a few other drivers are converted: vmx, wm, ixgbe / ixv. mcx also now calls ifmedia_init_with_lock() because it needs to also use an adaptive mutex. The mcx driver still needs to be fully converted to NET_MPSAFE.
2020-03-16 02:04:50 +03:00
mii_unlock(mii);
- Simplify sc->mii_anegticks setting. Same as FreeBSD. Don't set the default value not in the attach function. Instead, set the default value (MII_ANEGTICKS) first in the beginning of the mii_phy_add_media(). The function already has the code to change the value to MII_ANEGTICKS_GIGE if it's gigabit capable. - Remove extra pmf_device_register() call. It's done in mii_phy_add_media().
2019-11-27 13:19:20 +03:00
mii_phy_add_media(sc);
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
}
static void
smscphy_power(struct mii_softc *sc, bool power)
{
uint16_t bmcr, new;
PHY_READ(sc, MII_BMCR, &bmcr);
if (power)
new = bmcr & ~BMCR_PDOWN;
else
new = bmcr | BMCR_PDOWN;
if (bmcr != new)
PHY_WRITE(sc, MII_BMCR, new);
}
static int
smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife;
uint16_t reg;
Define and implement a locking protocol for the ifmedia / mii layers: - MP-safe drivers provide a mutex to ifmedia that is used to serialize access to media-related structures / hardware regsiters. Converted drivers use the new ifmedia_init_with_lock() function for this. The new name is provided to ease the transition. - Un-converted drivers continue to call ifmedia_init(), which will supply a compatibility lock to be used instead. Several media-related entry points must be aware of this compatibility lock, and are able to acquire it recursively a limited number of times, if needed. This is a SPIN mutex with priority IPL_NET. - This same lock is used to serialize access to PHY registers and other MII-related data structures. The PHY drivers are modified to acquire and release the lock, as needed, and assert the lock is held as a diagnostic aid. The "usbnet" framework has had an overhaul of its internal locking protocols to fit in with the media / mii changes, and the drivers adapted. USB wifi drivers have been changed to provide their own adaptive mutex to the ifmedia later via a new ieee80211_media_init_with_lock() function. This is required because the USB drivers need an adaptive mutex. Besised "usbnet", a few other drivers are converted: vmx, wm, ixgbe / ixv. mcx also now calls ifmedia_init_with_lock() because it needs to also use an adaptive mutex. The mcx driver still needs to be fully converted to NET_MPSAFE.
2020-03-16 02:04:50 +03:00
KASSERT(mii_locked(mii));
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
ife = mii->mii_media.ifm_cur;
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
/* Try to power up the PHY in case it's down */
if (IFM_SUBTYPE(ife->ifm_media) != IFM_NONE)
smscphy_power(sc, true);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
smscphy_auto(sc, ife->ifm_media);
break;
default:
mii_phy_setmedia(sc);
if (IFM_SUBTYPE(ife->ifm_media) == IFM_NONE)
smscphy_power(sc, false);
break;
}
break;
case MII_TICK:
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
break;
PHY_READ(sc, MII_BMSR, &reg);
PHY_READ(sc, MII_BMSR, &reg);
if (reg & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
if (++sc->mii_ticks <= MII_ANEGTICKS)
break;
PHY_RESET(sc);
smscphy_auto(sc, ife->ifm_media);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return 0;
}
static void
smscphy_auto(struct mii_softc *sc, int media)
{
uint16_t anar;
sc->mii_ticks = 0;
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
if ((media & IFM_FLOW) != 0)
anar |= ANAR_FC;
PHY_WRITE(sc, MII_ANAR, anar);
/* Apparently this helps. */
PHY_READ(sc, MII_ANAR, &anar);
PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
}
static void
smscphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
uint16_t bmcr, bmsr, status;
Define and implement a locking protocol for the ifmedia / mii layers: - MP-safe drivers provide a mutex to ifmedia that is used to serialize access to media-related structures / hardware regsiters. Converted drivers use the new ifmedia_init_with_lock() function for this. The new name is provided to ease the transition. - Un-converted drivers continue to call ifmedia_init(), which will supply a compatibility lock to be used instead. Several media-related entry points must be aware of this compatibility lock, and are able to acquire it recursively a limited number of times, if needed. This is a SPIN mutex with priority IPL_NET. - This same lock is used to serialize access to PHY registers and other MII-related data structures. The PHY drivers are modified to acquire and release the lock, as needed, and assert the lock is held as a diagnostic aid. The "usbnet" framework has had an overhaul of its internal locking protocols to fit in with the media / mii changes, and the drivers adapted. USB wifi drivers have been changed to provide their own adaptive mutex to the ifmedia later via a new ieee80211_media_init_with_lock() function. This is required because the USB drivers need an adaptive mutex. Besised "usbnet", a few other drivers are converted: vmx, wm, ixgbe / ixv. mcx also now calls ifmedia_init_with_lock() because it needs to also use an adaptive mutex. The mcx driver still needs to be fully converted to NET_MPSAFE.
2020-03-16 02:04:50 +03:00
KASSERT(mii_locked(mii));
Port SMSC LAN87xx 10/100 Ethernet PHY driver from FreeBSD with some cleanup and IFM_NONE support.
2019-11-01 05:53:22 +03:00
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
PHY_READ(sc, MII_BMSR, &bmsr);
PHY_READ(sc, MII_BMSR, &bmsr);
if ((bmsr & BMSR_LINK) != 0)
mii->mii_media_status |= IFM_ACTIVE;
PHY_READ(sc, MII_BMCR, &bmcr);
if ((bmcr & BMCR_ISO) != 0) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if ((bmcr & BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
if ((bmcr & BMCR_AUTOEN) != 0) {
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
PHY_READ(sc, SMSCPHY_SPCSR, &status);
if ((status & SPCSR_SPDIND_SPDMASK) == SPCSR_SPDIND_100)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (status & SPCSR_SPDIND_FDX)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
}