1 | /* $NetBSD: amhphy.c,v 1.20 2014/06/16 16:48:16 msaitoh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2001 Wasabi Systems, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * Written by Jason R. Thorpe for Wasabi Systems, Inc. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. All advertising materials mentioning features or use of this software |
18 | * must display the following acknowledgement: |
19 | * This product includes software developed for the NetBSD Project by |
20 | * Wasabi Systems, Inc. |
21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
22 | * or promote products derived from this software without specific prior |
23 | * written permission. |
24 | * |
25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ |
37 | |
38 | /* |
39 | * Driver for the 10BASE-T portion of the AMD Am79c901 PHY. |
40 | */ |
41 | |
42 | #include <sys/cdefs.h> |
43 | __KERNEL_RCSID(0, "$NetBSD: amhphy.c,v 1.20 2014/06/16 16:48:16 msaitoh Exp $" ); |
44 | |
45 | #include <sys/param.h> |
46 | #include <sys/systm.h> |
47 | #include <sys/kernel.h> |
48 | #include <sys/device.h> |
49 | #include <sys/socket.h> |
50 | #include <sys/errno.h> |
51 | |
52 | #include <net/if.h> |
53 | #include <net/if_media.h> |
54 | |
55 | #include <dev/mii/mii.h> |
56 | #include <dev/mii/miivar.h> |
57 | #include <dev/mii/miidevs.h> |
58 | |
59 | #include <dev/mii/amhphyreg.h> |
60 | |
61 | static int amhphymatch(device_t, cfdata_t, void *); |
62 | static void amhphyattach(device_t, device_t, void *); |
63 | |
64 | CFATTACH_DECL_NEW(amhphy, sizeof(struct mii_softc), |
65 | amhphymatch, amhphyattach, mii_phy_detach, mii_phy_activate); |
66 | |
67 | static int amhphy_service(struct mii_softc *, struct mii_data *, int); |
68 | static void amhphy_status(struct mii_softc *); |
69 | |
70 | static const struct mii_phy_funcs amhphy_funcs = { |
71 | amhphy_service, amhphy_status, mii_phy_reset, |
72 | }; |
73 | |
74 | static const struct mii_phydesc amhphys[] = { |
75 | { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901, |
76 | MII_STR_yyAMD_79c901 }, |
77 | |
78 | { 0, 0, |
79 | NULL }, |
80 | }; |
81 | |
82 | static int |
83 | amhphymatch(device_t parent, cfdata_t match, void *aux) |
84 | { |
85 | struct mii_attach_args *ma = aux; |
86 | |
87 | if (mii_phy_match(ma, amhphys) != NULL) |
88 | return (10); |
89 | |
90 | return (0); |
91 | } |
92 | |
93 | static void |
94 | amhphyattach(device_t parent, device_t self, void *aux) |
95 | { |
96 | struct mii_softc *sc = device_private(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, amhphys); |
102 | aprint_naive(": Media interface\n" ); |
103 | aprint_normal(": %s, rev. %d\n" , mpd->mpd_name, MII_REV(ma->mii_id2)); |
104 | |
105 | sc->mii_dev = self; |
106 | sc->mii_inst = mii->mii_instance; |
107 | sc->mii_phy = ma->mii_phyno; |
108 | sc->mii_funcs = &amhphy_funcs; |
109 | sc->mii_pdata = mii; |
110 | sc->mii_flags = ma->mii_flags; |
111 | sc->mii_anegticks = MII_ANEGTICKS; |
112 | |
113 | PHY_RESET(sc); |
114 | |
115 | sc->mii_capabilities = |
116 | PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
117 | aprint_normal_dev(self, "" ); |
118 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
119 | aprint_error("no media present" ); |
120 | else |
121 | mii_phy_add_media(sc); |
122 | aprint_normal("\n" ); |
123 | } |
124 | |
125 | static int |
126 | amhphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
127 | { |
128 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
129 | int reg; |
130 | |
131 | switch (cmd) { |
132 | case MII_POLLSTAT: |
133 | /* |
134 | * If we're not polling our PHY instance, just return. |
135 | */ |
136 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
137 | return (0); |
138 | break; |
139 | |
140 | case MII_MEDIACHG: |
141 | /* |
142 | * If the media indicates a different PHY instance, |
143 | * isolate ourselves. |
144 | */ |
145 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) { |
146 | reg = PHY_READ(sc, MII_BMCR); |
147 | PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); |
148 | return (0); |
149 | } |
150 | |
151 | /* |
152 | * If the interface is not up, don't do anything. |
153 | */ |
154 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
155 | break; |
156 | |
157 | mii_phy_setmedia(sc); |
158 | break; |
159 | |
160 | case MII_TICK: |
161 | /* |
162 | * If we're not currently selected, just return. |
163 | */ |
164 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
165 | return (0); |
166 | |
167 | if (mii_phy_tick(sc) == EJUSTRETURN) |
168 | return (0); |
169 | break; |
170 | |
171 | case MII_DOWN: |
172 | mii_phy_down(sc); |
173 | return (0); |
174 | } |
175 | |
176 | /* Update the media status. */ |
177 | mii_phy_status(sc); |
178 | |
179 | /* Callback if something changed. */ |
180 | mii_phy_update(sc, cmd); |
181 | return (0); |
182 | } |
183 | |
184 | static void |
185 | amhphy_status(struct mii_softc *sc) |
186 | { |
187 | struct mii_data *mii = sc->mii_pdata; |
188 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
189 | int bmsr, bmcr, ssr; |
190 | |
191 | mii->mii_media_status = IFM_AVALID; |
192 | mii->mii_media_active = IFM_ETHER; |
193 | |
194 | bmsr = PHY_READ(sc, MII_BMSR); |
195 | ssr = PHY_READ(sc, MII_AMHPHY_SSR); |
196 | |
197 | if (ssr & SSR_LS) |
198 | mii->mii_media_status |= IFM_ACTIVE; |
199 | |
200 | bmcr = PHY_READ(sc, MII_BMCR); |
201 | if (bmcr & BMCR_ISO) { |
202 | mii->mii_media_active |= IFM_NONE; |
203 | mii->mii_media_status = 0; |
204 | return; |
205 | } |
206 | |
207 | if (bmcr & BMCR_LOOP) |
208 | mii->mii_media_active |= IFM_LOOP; |
209 | |
210 | if (bmcr & BMCR_AUTOEN) { |
211 | /* |
212 | * The media status bits are only valid of autonegotiation |
213 | * has completed (or it's disabled). |
214 | */ |
215 | if ((bmsr & BMSR_ACOMP) == 0) { |
216 | /* Erg, still trying, I guess... */ |
217 | mii->mii_media_active |= IFM_NONE; |
218 | return; |
219 | } |
220 | |
221 | if (ssr & SSR_S) { |
222 | /* |
223 | * This should't really ever happen, since it's |
224 | * a 10BASE-T only PHY. But the bit exists, |
225 | * according to the documentation, so we pay |
226 | * attention to it. |
227 | */ |
228 | mii->mii_media_active |= IFM_100_TX; |
229 | } else |
230 | mii->mii_media_active |= IFM_10_T; |
231 | if (ssr & SSR_FD) |
232 | mii->mii_media_active |= IFM_FDX; |
233 | else |
234 | mii->mii_media_active |= IFM_HDX; |
235 | } else |
236 | mii->mii_media_active = ife->ifm_media; |
237 | } |
238 | |