1 | /* $NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
9 | * NASA Ames Research Center, and by Frank van der Linden. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * Copyright (c) 1997 Manuel Bouyer. All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
46 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
47 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
48 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
49 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
50 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
51 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
52 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
53 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
54 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
55 | */ |
56 | |
57 | /* |
58 | * driver for 3Com internal PHYs |
59 | */ |
60 | |
61 | #include <sys/cdefs.h> |
62 | __KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh Exp $" ); |
63 | |
64 | #include <sys/param.h> |
65 | #include <sys/systm.h> |
66 | #include <sys/kernel.h> |
67 | #include <sys/device.h> |
68 | #include <sys/socket.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 | static int exphymatch(device_t, cfdata_t, void *); |
78 | static void exphyattach(device_t, device_t, void *); |
79 | |
80 | CFATTACH_DECL_NEW(exphy, sizeof(struct mii_softc), |
81 | exphymatch, exphyattach, mii_phy_detach, mii_phy_activate); |
82 | |
83 | static int exphy_service(struct mii_softc *, struct mii_data *, int); |
84 | static void exphy_reset(struct mii_softc *); |
85 | |
86 | static const struct mii_phy_funcs exphy_funcs = { |
87 | exphy_service, ukphy_status, exphy_reset, |
88 | }; |
89 | |
90 | static int |
91 | exphymatch(device_t parent, cfdata_t match, void *aux) |
92 | { |
93 | struct mii_attach_args *ma = aux; |
94 | |
95 | /* |
96 | * Argh, 3Com PHY reports oui == 0 model == 0! |
97 | */ |
98 | if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && |
99 | MII_MODEL(ma->mii_id2) != 0) |
100 | return (0); |
101 | |
102 | /* |
103 | * Make sure the parent is an `ex'. |
104 | */ |
105 | if (!device_is_a(parent, "ex" )) |
106 | return (0); |
107 | |
108 | return (10); |
109 | } |
110 | |
111 | static void |
112 | exphyattach(device_t parent, device_t self, void *aux) |
113 | { |
114 | struct mii_softc *sc = device_private(self); |
115 | struct mii_attach_args *ma = aux; |
116 | struct mii_data *mii = ma->mii_data; |
117 | |
118 | aprint_naive(": Media interface\n" ); |
119 | aprint_normal(": 3Com internal media interface\n" ); |
120 | |
121 | sc->mii_dev = self; |
122 | sc->mii_inst = mii->mii_instance; |
123 | sc->mii_phy = ma->mii_phyno; |
124 | sc->mii_funcs = &exphy_funcs; |
125 | sc->mii_pdata = mii; |
126 | sc->mii_flags = ma->mii_flags; |
127 | sc->mii_anegticks = MII_ANEGTICKS; |
128 | |
129 | /* |
130 | * The 3Com PHY can never be isolated, so never allow non-zero |
131 | * instances! |
132 | */ |
133 | if (mii->mii_instance != 0) { |
134 | aprint_error_dev(self, |
135 | "ignoring this PHY, non-zero instance\n" ); |
136 | return; |
137 | } |
138 | sc->mii_flags |= MIIF_NOISOLATE; |
139 | |
140 | PHY_RESET(sc); |
141 | |
142 | sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
143 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
144 | aprint_error_dev(self, "no media present\n" ); |
145 | else { |
146 | aprint_normal_dev(self, "" ); |
147 | mii_phy_add_media(sc); |
148 | aprint_normal("\n" ); |
149 | } |
150 | } |
151 | |
152 | static int |
153 | exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
154 | { |
155 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
156 | |
157 | /* |
158 | * We can't isolate the 3Com PHY, so it has to be the only one! |
159 | */ |
160 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
161 | panic("exphy_service: can't isolate 3Com PHY" ); |
162 | |
163 | switch (cmd) { |
164 | case MII_POLLSTAT: |
165 | break; |
166 | |
167 | case MII_MEDIACHG: |
168 | /* |
169 | * If the interface is not up, don't do anything. |
170 | */ |
171 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
172 | break; |
173 | |
174 | mii_phy_setmedia(sc); |
175 | break; |
176 | |
177 | case MII_TICK: |
178 | /* |
179 | * Only used for autonegotiation. |
180 | */ |
181 | if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) |
182 | break; |
183 | |
184 | if (mii_phy_tick(sc) == EJUSTRETURN) |
185 | return (0); |
186 | break; |
187 | |
188 | case MII_DOWN: |
189 | mii_phy_down(sc); |
190 | return (0); |
191 | } |
192 | |
193 | /* Update the media status. */ |
194 | mii_phy_status(sc); |
195 | |
196 | /* Callback if something changed. */ |
197 | mii_phy_update(sc, cmd); |
198 | return (0); |
199 | } |
200 | |
201 | static void |
202 | exphy_reset(struct mii_softc *sc) |
203 | { |
204 | |
205 | mii_phy_reset(sc); |
206 | |
207 | /* |
208 | * XXX 3Com PHY doesn't set the BMCR properly after |
209 | * XXX reset, which breaks autonegotiation. |
210 | */ |
211 | PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX); |
212 | } |
213 | |