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/*
35 * driver for Intel 82553 and 82555 PHYs
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/module.h>
42#include <sys/socket.h>
43#include <sys/bus.h>
44
45#include <net/if.h>
46#include <net/if_var.h>
47#include <net/if_media.h>
48
49#include <dev/mii/mii.h>
50#include <dev/mii/miivar.h>
51#include "miidevs.h"
52
53#include <dev/fxp/inphyreg.h>
54
55#include "miibus_if.h"
56
57static int 	inphy_probe(device_t dev);
58static int 	inphy_attach(device_t dev);
59
60static device_method_t inphy_methods[] = {
61	/* device interface */
62	DEVMETHOD(device_probe,		inphy_probe),
63	DEVMETHOD(device_attach,	inphy_attach),
64	DEVMETHOD(device_detach,	mii_phy_detach),
65	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
66	{ 0, 0 }
67};
68
69static driver_t inphy_driver = {
70	"inphy",
71	inphy_methods,
72	sizeof(struct mii_softc)
73};
74
75DRIVER_MODULE(inphy, miibus, inphy_driver, 0, 0);
76
77static int	inphy_service(struct mii_softc *, struct mii_data *, int);
78static void	inphy_status(struct mii_softc *);
79static void	inphy_reset(struct mii_softc *);
80
81static const struct mii_phydesc inphys[] = {
82	MII_PHY_DESC(xxINTEL, I82553),
83	MII_PHY_DESC(yyINTEL, I82553),
84	MII_PHY_DESC(yyINTEL, I82555),
85	MII_PHY_DESC(yyINTEL, I82562EM),
86	MII_PHY_DESC(yyINTEL, I82562ET),
87	MII_PHY_END
88};
89
90static const struct mii_phy_funcs inphy_funcs = {
91	inphy_service,
92	inphy_status,
93	inphy_reset
94};
95
96static int
97inphy_probe(device_t dev)
98{
99
100	return (mii_phy_dev_probe(dev, inphys, BUS_PROBE_DEFAULT));
101}
102
103static int
104inphy_attach(device_t dev)
105{
106
107	mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &inphy_funcs, 1);
108	return (0);
109}
110
111static int
112inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
113{
114
115	switch (cmd) {
116	case MII_POLLSTAT:
117		break;
118
119	case MII_MEDIACHG:
120		/*
121		 * If the interface is not up, don't do anything.
122		 */
123		if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
124			break;
125
126		mii_phy_setmedia(sc);
127		break;
128
129	case MII_TICK:
130		if (mii_phy_tick(sc) == EJUSTRETURN)
131			return (0);
132		break;
133	}
134
135	/* Update the media status. */
136	PHY_STATUS(sc);
137
138	/* Callback if something changed. */
139	mii_phy_update(sc, cmd);
140	return (0);
141}
142
143static void
144inphy_status(struct mii_softc *sc)
145{
146	struct mii_data *mii = sc->mii_pdata;
147	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
148	int bmsr, bmcr, scr;
149
150	mii->mii_media_status = IFM_AVALID;
151	mii->mii_media_active = IFM_ETHER;
152
153	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
154	if (bmsr & BMSR_LINK)
155		mii->mii_media_status |= IFM_ACTIVE;
156
157	bmcr = PHY_READ(sc, MII_BMCR);
158	if (bmcr & BMCR_ISO) {
159		mii->mii_media_active |= IFM_NONE;
160		mii->mii_media_status = 0;
161		return;
162	}
163
164	if (bmcr & BMCR_LOOP)
165		mii->mii_media_active |= IFM_LOOP;
166
167	if (bmcr & BMCR_AUTOEN) {
168		if ((bmsr & BMSR_ACOMP) == 0) {
169			mii->mii_media_active |= IFM_NONE;
170			return;
171		}
172
173		scr = PHY_READ(sc, MII_INPHY_SCR);
174		if (scr & SCR_S100)
175			mii->mii_media_active |= IFM_100_TX;
176		else
177			mii->mii_media_active |= IFM_10_T;
178		if (scr & SCR_FDX)
179			mii->mii_media_active |=
180			    IFM_FDX | mii_phy_flowstatus(sc);
181		else
182			mii->mii_media_active |= IFM_HDX;
183	} else
184		mii->mii_media_active = ife->ifm_media;
185}
186
187static void
188inphy_reset(struct mii_softc *sc)
189{
190
191	mii_phy_reset(sc);
192
193	/* Ensure Bay flow control is disabled. */
194	PHY_WRITE(sc, MII_INPHY_SCR,
195	    PHY_READ(sc, MII_INPHY_SCR) & ~SCR_FLOWCTL);
196}
197