1 | /* $NetBSD: pnaphy.c,v 1.21 2016/07/07 06:55:41 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 generic HomePNA 1.0 PHYs. |
40 | * |
41 | * HomePNA 1.0 PHYs are pretty simple -- they support exactly one |
42 | * media type, and don't do autonegotiation. |
43 | * |
44 | * HomePNA PHYs often have vendor-specific registers for tuning |
45 | * the network connection, but we don't deal with any of that |
46 | * at all. |
47 | */ |
48 | |
49 | #include <sys/cdefs.h> |
50 | __KERNEL_RCSID(0, "$NetBSD: pnaphy.c,v 1.21 2016/07/07 06:55:41 msaitoh Exp $" ); |
51 | |
52 | #include <sys/param.h> |
53 | #include <sys/systm.h> |
54 | #include <sys/kernel.h> |
55 | #include <sys/device.h> |
56 | #include <sys/socket.h> |
57 | #include <sys/errno.h> |
58 | |
59 | #include <net/if.h> |
60 | #include <net/if_media.h> |
61 | |
62 | #include <dev/mii/mii.h> |
63 | #include <dev/mii/miivar.h> |
64 | #include <dev/mii/miidevs.h> |
65 | |
66 | static int pnaphymatch(device_t, cfdata_t, void *); |
67 | static void pnaphyattach(device_t, device_t, void *); |
68 | |
69 | CFATTACH_DECL_NEW(pnaphy, sizeof(struct mii_softc), |
70 | pnaphymatch, pnaphyattach, mii_phy_detach, mii_phy_activate); |
71 | |
72 | static int pnaphy_service(struct mii_softc *, struct mii_data *, int); |
73 | static void pnaphy_status(struct mii_softc *); |
74 | |
75 | static const struct mii_phy_funcs pnaphy_funcs = { |
76 | pnaphy_service, pnaphy_status, mii_phy_reset, |
77 | }; |
78 | |
79 | static const struct mii_phydesc pnaphys[] = { |
80 | { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901home, |
81 | MII_STR_yyAMD_79c901home }, |
82 | |
83 | { 0, 0, |
84 | NULL }, |
85 | }; |
86 | |
87 | static int |
88 | pnaphymatch(device_t parent, cfdata_t match, void *aux) |
89 | { |
90 | struct mii_attach_args *ma = aux; |
91 | |
92 | if (mii_phy_match(ma, pnaphys) != NULL) { |
93 | /* |
94 | * Match higher than ukphy, but lower than a specific |
95 | * driver would match. |
96 | */ |
97 | return (2); |
98 | } |
99 | |
100 | return (0); |
101 | } |
102 | |
103 | static void |
104 | pnaphyattach(device_t parent, device_t self, void *aux) |
105 | { |
106 | struct mii_softc *sc = device_private(self); |
107 | struct mii_attach_args *ma = aux; |
108 | struct mii_data *mii = ma->mii_data; |
109 | const struct mii_phydesc *mpd; |
110 | |
111 | mpd = mii_phy_match(ma, pnaphys); |
112 | aprint_naive(": Media interface\n" ); |
113 | aprint_normal(": %s, rev. %d\n" , mpd->mpd_name, MII_REV(ma->mii_id2)); |
114 | |
115 | sc->mii_dev = self; |
116 | sc->mii_inst = mii->mii_instance; |
117 | sc->mii_phy = ma->mii_phyno; |
118 | sc->mii_funcs = &pnaphy_funcs; |
119 | sc->mii_pdata = mii; |
120 | sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* force HomePNA */ |
121 | sc->mii_anegticks = MII_ANEGTICKS; |
122 | |
123 | PHY_RESET(sc); |
124 | |
125 | sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
126 | aprint_normal_dev(self, "" ); |
127 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
128 | aprint_error("no media present" ); |
129 | else |
130 | mii_phy_add_media(sc); |
131 | aprint_normal("\n" ); |
132 | } |
133 | |
134 | static int |
135 | pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
136 | { |
137 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
138 | int reg; |
139 | |
140 | switch (cmd) { |
141 | case MII_POLLSTAT: |
142 | /* |
143 | * If we're not polling our PHY instance, just return. |
144 | */ |
145 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
146 | return (0); |
147 | break; |
148 | |
149 | case MII_MEDIACHG: |
150 | /* |
151 | * If the media indicates a different PHY instance, |
152 | * isolate ourselves. |
153 | */ |
154 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) { |
155 | reg = PHY_READ(sc, MII_BMCR); |
156 | PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); |
157 | return (0); |
158 | } |
159 | |
160 | /* |
161 | * If the interface is not up, don't do anything. |
162 | */ |
163 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
164 | break; |
165 | |
166 | mii_phy_setmedia(sc); |
167 | break; |
168 | |
169 | case MII_TICK: |
170 | /* |
171 | * If we're not currently selected, just return. |
172 | */ |
173 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
174 | return (0); |
175 | |
176 | if (mii_phy_tick(sc) == EJUSTRETURN) |
177 | return (0); |
178 | break; |
179 | |
180 | case MII_DOWN: |
181 | mii_phy_down(sc); |
182 | return (0); |
183 | } |
184 | |
185 | /* Update the media status. */ |
186 | mii_phy_status(sc); |
187 | |
188 | /* Callback if something changed. */ |
189 | mii_phy_update(sc, cmd); |
190 | return (0); |
191 | } |
192 | |
193 | static void |
194 | pnaphy_status(struct mii_softc *sc) |
195 | { |
196 | struct mii_data *mii = sc->mii_pdata; |
197 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
198 | int bmsr, bmcr; |
199 | |
200 | mii->mii_media_status = IFM_AVALID; |
201 | mii->mii_media_active = IFM_ETHER; |
202 | |
203 | bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); |
204 | |
205 | if (bmsr & BMSR_LINK) |
206 | mii->mii_media_status |= IFM_ACTIVE; |
207 | |
208 | bmcr = PHY_READ(sc, MII_BMCR); |
209 | if (bmcr & BMCR_ISO) { |
210 | mii->mii_media_active |= IFM_NONE; |
211 | mii->mii_media_status = 0; |
212 | return; |
213 | } |
214 | |
215 | if (bmcr & BMCR_LOOP) |
216 | mii->mii_media_active |= IFM_LOOP; |
217 | |
218 | /* |
219 | * On HomePNA PHYs, the current media is always the selected |
220 | * media. |
221 | * |
222 | * XXX May not be the case w/ HomePNA 2. |
223 | */ |
224 | mii->mii_media_active = ife->ifm_media; |
225 | } |
226 | |