1 /* $OpenBSD: luphy.c,v 1.7 2022/04/06 18:59:29 naddy Exp $ */
2
3 /*-
4 * Copyright (c) 2004 Marius Strobl
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /*
30 * Driver for the Lucent Technologies LU6612 Ethernet 10/100 PHY, which
31 * is pin-compatible to the Quality Semiconductor QS6612 but uses a
32 * different register layout. Sun Microsystems uses the LU6612 together
33 * with their HME chip on a couple of bords originally designed for the
34 * QS6612. At least on these boards none of the LU6612 must be isolated
35 * otherwise the MII bus wedges and the other one (there can be a maximum
36 * of two PHYs connected to the HME) no longer can communicate with the
37 * HME (powering down the unused PHY etc. also doesn't help). This is
38 * why we can't use the ukphy driver for the LU6612.
39 * The datasheet for the LU6612 is no longer available on lucent.com or
40 * www.agere.com (former Lucent Microelectronics Group) but you still
41 * should be able to find it when searching for DS00355.pdf or LU6612.pdf.
42 */
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/device.h>
47 #include <sys/socket.h>
48
49 #include <net/if.h>
50 #include <net/if_var.h>
51 #include <net/if_media.h>
52
53 #include <dev/mii/mii.h>
54 #include <dev/mii/miivar.h>
55 #include <dev/mii/miidevs.h>
56
57 int luphymatch(struct device *, void *, void *);
58 void luphyattach(struct device *, struct device *, void *);
59
60 const struct cfattach luphy_ca = {
61 sizeof(struct mii_softc), luphymatch, luphyattach, mii_phy_detach
62 };
63
64 struct cfdriver luphy_cd = {
65 NULL, "luphy", DV_DULL
66 };
67
68 int luphy_service(struct mii_softc *, struct mii_data *, int);
69
70 const struct mii_phy_funcs luphy_funcs = {
71 luphy_service, ukphy_status, mii_phy_reset,
72 };
73
74 static const struct mii_phydesc luphys[] = {
75 { MII_OUI_LUCENT, MII_MODEL_LUCENT_LU6612,
76 MII_STR_LUCENT_LU6612 },
77
78 { 0, 0,
79 NULL },
80 };
81
82 int
luphymatch(struct device * parent,void * match,void * aux)83 luphymatch(struct device *parent, void *match, void *aux)
84 {
85 struct mii_attach_args *ma = aux;
86
87 if (mii_phy_match(ma, luphys) != NULL)
88 return (10);
89
90 return (0);
91 }
92
93 void
luphyattach(struct device * parent,struct device * self,void * aux)94 luphyattach(struct device *parent, struct device *self, void *aux)
95 {
96 struct mii_softc *sc = (struct mii_softc *)self;
97 struct mii_attach_args *ma = aux;
98 struct mii_data *mii = ma->mii_data;
99 const struct mii_phydesc *mpd;
100
101 mpd = mii_phy_match(ma, luphys);
102 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
103
104 sc->mii_inst = mii->mii_instance;
105 sc->mii_phy = ma->mii_phyno;
106 sc->mii_funcs = &luphy_funcs;
107 sc->mii_pdata = mii;
108 sc->mii_flags = ma->mii_flags;
109
110 sc->mii_flags |= MIIF_NOISOLATE;
111
112 PHY_RESET(sc);
113
114 sc->mii_capabilities =
115 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
116 if (sc->mii_capabilities & BMSR_MEDIAMASK)
117 mii_phy_add_media(sc);
118 }
119
120 int
luphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)121 luphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
122 {
123 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
124
125 switch (cmd) {
126 case MII_POLLSTAT:
127 /*
128 * If we're not polling our PHY instance, just return.
129 */
130 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
131 return (0);
132 break;
133
134 case MII_MEDIACHG:
135 /*
136 * If the media indicates a different PHY instance,
137 * just return. Isolating unused PHYs from the bus
138 * causes at least the MII bus of the HME to wedge.
139 */
140 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
141 return (0);
142
143 /*
144 * If the interface is not up, don't do anything.
145 */
146 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
147 break;
148
149 mii_phy_setmedia(sc);
150 break;
151
152 case MII_TICK:
153 /*
154 * If we're not currently selected, just return.
155 */
156 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
157 return (0);
158
159 if (mii_phy_tick(sc) == EJUSTRETURN)
160 return (0);
161 break;
162
163 case MII_DOWN:
164 mii_phy_down(sc);
165 return (0);
166 }
167
168 /* Update the media status. */
169 mii_phy_status(sc);
170
171 /* Callback if something changed. */
172 mii_phy_update(sc, cmd);
173 return (0);
174 }
175