xref: /freebsd/sys/dev/fxp/inphy.c (revision 69c5bce6ee1ec42997757e7f1334767d217c5d7d)
1 /*-
2  * Copyright (c) 2001 Jonathan Lemon
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the author nor the names of any co-contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  */
30 
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33 
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_media.h>
47 
48 #include <dev/mii/mii.h>
49 #include <dev/mii/miivar.h>
50 #include "miidevs.h"
51 
52 #include <dev/fxp/inphyreg.h>
53 
54 #include "miibus_if.h"
55 
56 static int 	inphy_probe(device_t dev);
57 static int 	inphy_attach(device_t dev);
58 
59 static device_method_t inphy_methods[] = {
60 	/* device interface */
61 	DEVMETHOD(device_probe,		inphy_probe),
62 	DEVMETHOD(device_attach,	inphy_attach),
63 	DEVMETHOD(device_detach,	mii_phy_detach),
64 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
65 	{ 0, 0 }
66 };
67 
68 static devclass_t inphy_devclass;
69 
70 static driver_t inphy_driver = {
71 	"inphy",
72 	inphy_methods,
73 	sizeof(struct mii_softc)
74 };
75 
76 DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0);
77 
78 static int	inphy_service(struct mii_softc *, struct mii_data *, int);
79 static void	inphy_status(struct mii_softc *);
80 static void	inphy_reset(struct mii_softc *);
81 
82 static const struct mii_phydesc inphys[] = {
83 	MII_PHY_DESC(xxINTEL, I82553),
84 	MII_PHY_DESC(yyINTEL, I82553),
85 	MII_PHY_DESC(yyINTEL, I82555),
86 	MII_PHY_DESC(yyINTEL, I82562EM),
87 	MII_PHY_DESC(yyINTEL, I82562ET),
88 	MII_PHY_END
89 };
90 
91 static const struct mii_phy_funcs inphy_funcs = {
92 	inphy_service,
93 	inphy_status,
94 	inphy_reset
95 };
96 
97 static int
98 inphy_probe(device_t dev)
99 {
100 
101 	return (mii_phy_dev_probe(dev, inphys, BUS_PROBE_DEFAULT));
102 }
103 
104 static int
105 inphy_attach(device_t dev)
106 {
107 
108 	mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &inphy_funcs, 1);
109 	return (0);
110 }
111 
112 static int
113 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
114 {
115 
116 	switch (cmd) {
117 	case MII_POLLSTAT:
118 		break;
119 
120 	case MII_MEDIACHG:
121 		/*
122 		 * If the interface is not up, don't do anything.
123 		 */
124 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
125 			break;
126 
127 		mii_phy_setmedia(sc);
128 		break;
129 
130 	case MII_TICK:
131 		if (mii_phy_tick(sc) == EJUSTRETURN)
132 			return (0);
133 		break;
134 	}
135 
136 	/* Update the media status. */
137 	PHY_STATUS(sc);
138 
139 	/* Callback if something changed. */
140 	mii_phy_update(sc, cmd);
141 	return (0);
142 }
143 
144 static void
145 inphy_status(struct mii_softc *sc)
146 {
147 	struct mii_data *mii = sc->mii_pdata;
148 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
149 	int bmsr, bmcr, scr;
150 
151 	mii->mii_media_status = IFM_AVALID;
152 	mii->mii_media_active = IFM_ETHER;
153 
154 	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
155 	if (bmsr & BMSR_LINK)
156 		mii->mii_media_status |= IFM_ACTIVE;
157 
158 	bmcr = PHY_READ(sc, MII_BMCR);
159 	if (bmcr & BMCR_ISO) {
160 		mii->mii_media_active |= IFM_NONE;
161 		mii->mii_media_status = 0;
162 		return;
163 	}
164 
165 	if (bmcr & BMCR_LOOP)
166 		mii->mii_media_active |= IFM_LOOP;
167 
168 	if (bmcr & BMCR_AUTOEN) {
169 		if ((bmsr & BMSR_ACOMP) == 0) {
170 			mii->mii_media_active |= IFM_NONE;
171 			return;
172 		}
173 
174 		scr = PHY_READ(sc, MII_INPHY_SCR);
175 		if (scr & SCR_S100)
176 			mii->mii_media_active |= IFM_100_TX;
177 		else
178 			mii->mii_media_active |= IFM_10_T;
179 		if (scr & SCR_FDX)
180 			mii->mii_media_active |=
181 			    IFM_FDX | mii_phy_flowstatus(sc);
182 		else
183 			mii->mii_media_active |= IFM_HDX;
184 	} else
185 		mii->mii_media_active = ife->ifm_media;
186 }
187 
188 static void
189 inphy_reset(struct mii_softc *sc)
190 {
191 
192 	mii_phy_reset(sc);
193 
194 	/* Ensure Bay flow control is disabled. */
195 	PHY_WRITE(sc, MII_INPHY_SCR,
196 	    PHY_READ(sc, MII_INPHY_SCR) & ~SCR_FLOWCTL);
197 }
198