xref: /openbsd/sys/dev/mii/inphy.c (revision cca36db2)
1 /*	$OpenBSD: inphy.c,v 1.18 2010/07/23 07:47:13 jsg Exp $	*/
2 /*	$NetBSD: inphy.c,v 1.18 2000/02/02 23:34:56 thorpej Exp $	*/
3 
4 /*-
5  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6  * All rights reserved.
7  *
8  * This code is derived from software contributed to The NetBSD Foundation
9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10  * NASA Ames Research Center.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 /*
35  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
36  *
37  * Redistribution and use in source and binary forms, with or without
38  * modification, are permitted provided that the following conditions
39  * are met:
40  * 1. Redistributions of source code must retain the above copyright
41  *    notice, this list of conditions and the following disclaimer.
42  * 2. Redistributions in binary form must reproduce the above copyright
43  *    notice, this list of conditions and the following disclaimer in the
44  *    documentation and/or other materials provided with the distribution.
45  *
46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
47  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
48  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
50  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
51  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
52  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
53  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
54  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
55  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56  */
57 
58 /*
59  * driver for Intel's i82555 ethernet 10/100 PHY
60  * Data Sheet available from www.intel.com
61  */
62 
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/kernel.h>
66 #include <sys/device.h>
67 #include <sys/socket.h>
68 #include <sys/errno.h>
69 
70 #include <net/if.h>
71 #include <net/if_media.h>
72 
73 #include <dev/mii/mii.h>
74 #include <dev/mii/miivar.h>
75 #include <dev/mii/miidevs.h>
76 
77 #include <dev/mii/inphyreg.h>
78 
79 int	inphymatch(struct device *, void *, void *);
80 void	inphyattach(struct device *, struct device *, void *);
81 
82 struct cfattach inphy_ca = {
83 	sizeof(struct mii_softc), inphymatch, inphyattach, mii_phy_detach,
84 	    mii_phy_activate
85 };
86 
87 struct cfdriver inphy_cd = {
88 	NULL, "inphy", DV_DULL
89 };
90 
91 int	inphy_service(struct mii_softc *, struct mii_data *, int);
92 void	inphy_status(struct mii_softc *);
93 
94 const struct mii_phy_funcs inphy_funcs = {
95 	inphy_service, inphy_status, mii_phy_reset,
96 };
97 
98 static const struct mii_phydesc inphys[] = {
99 	{ MII_OUI_INTEL,		MII_MODEL_INTEL_I82555,
100 	  MII_STR_INTEL_I82555 },
101 	{ MII_OUI_INTEL,		MII_MODEL_INTEL_I82562EM,
102 	  MII_STR_INTEL_I82562EM },
103 	{ MII_OUI_INTEL,		MII_MODEL_INTEL_I82562ET,
104 	  MII_STR_INTEL_I82562ET },
105 	{ MII_OUI_INTEL,		MII_MODEL_INTEL_I82562G,
106 	  MII_STR_INTEL_I82562G },
107 
108 	{ 0,			0,
109 	  NULL },
110 };
111 
112 int
113 inphymatch(parent, match, aux)
114 	struct device *parent;
115 	void *match;
116 	void *aux;
117 {
118 	struct mii_attach_args *ma = aux;
119 
120 	if (mii_phy_match(ma, inphys) != NULL)
121 		return (10);
122 
123 	return (0);
124 }
125 
126 void
127 inphyattach(parent, self, aux)
128 	struct device *parent, *self;
129 	void *aux;
130 {
131 	struct mii_softc *sc = (struct mii_softc *)self;
132 	struct mii_attach_args *ma = aux;
133 	struct mii_data *mii = ma->mii_data;
134 	const struct mii_phydesc *mpd;
135 
136 	mpd = mii_phy_match(ma, inphys);
137 	printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
138 
139 	sc->mii_inst = mii->mii_instance;
140 	sc->mii_phy = ma->mii_phyno;
141 	sc->mii_funcs = &inphy_funcs;
142 	sc->mii_pdata = mii;
143 	sc->mii_flags = ma->mii_flags;
144 
145 	PHY_RESET(sc);
146 
147 	sc->mii_capabilities =
148 	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
149 	if (sc->mii_capabilities & BMSR_MEDIAMASK)
150 		mii_phy_add_media(sc);
151 }
152 
153 int
154 inphy_service(sc, mii, cmd)
155 	struct mii_softc *sc;
156 	struct mii_data *mii;
157 	int cmd;
158 {
159 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
160 	int reg;
161 
162 	if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
163 		return (ENXIO);
164 
165 	switch (cmd) {
166 	case MII_POLLSTAT:
167 		/*
168 		 * If we're not polling our PHY instance, just return.
169 		 */
170 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
171 			return (0);
172 		break;
173 
174 	case MII_MEDIACHG:
175 		/*
176 		 * If the media indicates a different PHY instance,
177 		 * isolate ourselves.
178 		 */
179 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
180 			reg = PHY_READ(sc, MII_BMCR);
181 			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
182 			return (0);
183 		}
184 
185 		/*
186 		 * If the interface is not up, don't do anything.
187 		 */
188 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
189 			break;
190 
191 		mii_phy_setmedia(sc);
192 		break;
193 
194 	case MII_TICK:
195 		/*
196 		 * If we're not currently selected, just return.
197 		 */
198 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
199 			return (0);
200 
201 		if (mii_phy_tick(sc) == EJUSTRETURN)
202 			return (0);
203 		break;
204 
205 	case MII_DOWN:
206 		mii_phy_down(sc);
207 		return (0);
208 	}
209 
210 	/* Update the media status. */
211 	mii_phy_status(sc);
212 
213 	/* Callback if something changed. */
214 	mii_phy_update(sc, cmd);
215 	return (0);
216 }
217 
218 void
219 inphy_status(sc)
220 	struct mii_softc *sc;
221 {
222 	struct mii_data *mii = sc->mii_pdata;
223 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
224 	int bmsr, bmcr, scr;
225 
226 	mii->mii_media_status = IFM_AVALID;
227 	mii->mii_media_active = IFM_ETHER;
228 
229 	bmsr = PHY_READ(sc, MII_BMSR) |
230 	    PHY_READ(sc, MII_BMSR);
231 	if (bmsr & BMSR_LINK)
232 		mii->mii_media_status |= IFM_ACTIVE;
233 
234 	bmcr = PHY_READ(sc, MII_BMCR);
235 	if (bmcr & BMCR_ISO) {
236 		mii->mii_media_active |= IFM_NONE;
237 		mii->mii_media_status = 0;
238 		return;
239 	}
240 
241 	if (bmcr & BMCR_LOOP)
242 		mii->mii_media_active |= IFM_LOOP;
243 
244 	if (bmcr & BMCR_AUTOEN) {
245 		if ((bmsr & BMSR_ACOMP) == 0) {
246 			/* Erg, still trying, I guess... */
247 			mii->mii_media_active |= IFM_NONE;
248 			return;
249 		}
250 
251 		scr = PHY_READ(sc, MII_INPHY_SCR);
252 		if (scr & SCR_S100)
253 			mii->mii_media_active |= IFM_100_TX;
254 		else if ((bmsr & BMSR_100T4) && (scr & SCR_T4))
255 			mii->mii_media_active |= IFM_100_T4;
256 		else
257 			mii->mii_media_active |= IFM_10_T;
258 
259 		if (scr & SCR_FDX)
260 			mii->mii_media_active |= IFM_FDX;
261 		else
262 			mii->mii_media_active |= IFM_HDX;
263 	} else
264 		mii->mii_media_active = ife->ifm_media;
265 }
266