1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001 Jonathan Lemon
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of any co-contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: releng/12.0/sys/dev/fxp/inphy.c 326022 2017-11-20 19:36:21Z pfg $");
35
36/*
37 * driver for Intel 82553 and 82555 PHYs
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/module.h>
44#include <sys/socket.h>
45#include <sys/bus.h>
46
47#include <net/if.h>
48#include <net/if_var.h>
49#include <net/if_media.h>
50
51#include <dev/mii/mii.h>
52#include <dev/mii/miivar.h>
53#include "miidevs.h"
54
55#include <dev/fxp/inphyreg.h>
56
57#include "miibus_if.h"
58
59static int 	inphy_probe(device_t dev);
60static int 	inphy_attach(device_t dev);
61
62static device_method_t inphy_methods[] = {
63	/* device interface */
64	DEVMETHOD(device_probe,		inphy_probe),
65	DEVMETHOD(device_attach,	inphy_attach),
66	DEVMETHOD(device_detach,	mii_phy_detach),
67	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
68	{ 0, 0 }
69};
70
71static devclass_t inphy_devclass;
72
73static driver_t inphy_driver = {
74	"inphy",
75	inphy_methods,
76	sizeof(struct mii_softc)
77};
78
79DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0);
80
81static int	inphy_service(struct mii_softc *, struct mii_data *, int);
82static void	inphy_status(struct mii_softc *);
83static void	inphy_reset(struct mii_softc *);
84
85static const struct mii_phydesc inphys[] = {
86	MII_PHY_DESC(xxINTEL, I82553),
87	MII_PHY_DESC(yyINTEL, I82553),
88	MII_PHY_DESC(yyINTEL, I82555),
89	MII_PHY_DESC(yyINTEL, I82562EM),
90	MII_PHY_DESC(yyINTEL, I82562ET),
91	MII_PHY_END
92};
93
94static const struct mii_phy_funcs inphy_funcs = {
95	inphy_service,
96	inphy_status,
97	inphy_reset
98};
99
100static int
101inphy_probe(device_t dev)
102{
103
104	return (mii_phy_dev_probe(dev, inphys, BUS_PROBE_DEFAULT));
105}
106
107static int
108inphy_attach(device_t dev)
109{
110
111	mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &inphy_funcs, 1);
112	return (0);
113}
114
115static int
116inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
117{
118
119	switch (cmd) {
120	case MII_POLLSTAT:
121		break;
122
123	case MII_MEDIACHG:
124		/*
125		 * If the interface is not up, don't do anything.
126		 */
127		if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
128			break;
129
130		mii_phy_setmedia(sc);
131		break;
132
133	case MII_TICK:
134		if (mii_phy_tick(sc) == EJUSTRETURN)
135			return (0);
136		break;
137	}
138
139	/* Update the media status. */
140	PHY_STATUS(sc);
141
142	/* Callback if something changed. */
143	mii_phy_update(sc, cmd);
144	return (0);
145}
146
147static void
148inphy_status(struct mii_softc *sc)
149{
150	struct mii_data *mii = sc->mii_pdata;
151	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
152	int bmsr, bmcr, scr;
153
154	mii->mii_media_status = IFM_AVALID;
155	mii->mii_media_active = IFM_ETHER;
156
157	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
158	if (bmsr & BMSR_LINK)
159		mii->mii_media_status |= IFM_ACTIVE;
160
161	bmcr = PHY_READ(sc, MII_BMCR);
162	if (bmcr & BMCR_ISO) {
163		mii->mii_media_active |= IFM_NONE;
164		mii->mii_media_status = 0;
165		return;
166	}
167
168	if (bmcr & BMCR_LOOP)
169		mii->mii_media_active |= IFM_LOOP;
170
171	if (bmcr & BMCR_AUTOEN) {
172		if ((bmsr & BMSR_ACOMP) == 0) {
173			mii->mii_media_active |= IFM_NONE;
174			return;
175		}
176
177		scr = PHY_READ(sc, MII_INPHY_SCR);
178		if (scr & SCR_S100)
179			mii->mii_media_active |= IFM_100_TX;
180		else
181			mii->mii_media_active |= IFM_10_T;
182		if (scr & SCR_FDX)
183			mii->mii_media_active |=
184			    IFM_FDX | mii_phy_flowstatus(sc);
185		else
186			mii->mii_media_active |= IFM_HDX;
187	} else
188		mii->mii_media_active = ife->ifm_media;
189}
190
191static void
192inphy_reset(struct mii_softc *sc)
193{
194
195	mii_phy_reset(sc);
196
197	/* Ensure Bay flow control is disabled. */
198	PHY_WRITE(sc, MII_INPHY_SCR,
199	    PHY_READ(sc, MII_INPHY_SCR) & ~SCR_FLOWCTL);
200}
201