1 | /* $NetBSD: urlphy.c,v 1.31 2016/07/07 06:55:41 msaitoh Exp $ */ |
2 | /* |
3 | * Copyright (c) 2001, 2002 |
4 | * Shingo WATANABE <nabe@nabechan.org>. All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * 3. Neither the name of the author nor the names of any co-contributors |
15 | * may be used to endorse or promote products derived from this software |
16 | * without specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
28 | * SUCH DAMAGE. |
29 | * |
30 | */ |
31 | |
32 | /* |
33 | * driver for Realtek RL8150L internal phy |
34 | */ |
35 | |
36 | #include <sys/cdefs.h> |
37 | __KERNEL_RCSID(0, "$NetBSD: urlphy.c,v 1.31 2016/07/07 06:55:41 msaitoh Exp $" ); |
38 | |
39 | #include <sys/param.h> |
40 | #include <sys/systm.h> |
41 | #include <sys/kernel.h> |
42 | #include <sys/device.h> |
43 | #include <sys/socket.h> |
44 | |
45 | #include <net/if.h> |
46 | #include <net/if_media.h> |
47 | |
48 | #include <dev/mii/mii.h> |
49 | #include <dev/mii/miivar.h> |
50 | #include <dev/mii/miidevs.h> |
51 | #include <dev/mii/urlphyreg.h> |
52 | |
53 | #ifdef URLPHY_DEBUG |
54 | #define DPRINTF(x) if (urlphydebug) printf x |
55 | #define DPRINTFN(n,x) if (urlphydebug>(n)) printf x |
56 | int urlphydebug = URLPHY_DEBUG; |
57 | #else |
58 | #define DPRINTF(x) |
59 | #define DPRINTFN(n,x) |
60 | #endif |
61 | |
62 | static int urlphy_match(device_t, cfdata_t, void *); |
63 | static void urlphy_attach(device_t, device_t, void *); |
64 | |
65 | CFATTACH_DECL_NEW(urlphy, sizeof(struct mii_softc), |
66 | urlphy_match, urlphy_attach, mii_phy_detach, mii_phy_activate); |
67 | |
68 | static int urlphy_service(struct mii_softc *, struct mii_data *, int); |
69 | static void urlphy_status(struct mii_softc *); |
70 | |
71 | static const struct mii_phy_funcs urlphy_funcs = { |
72 | urlphy_service, urlphy_status, mii_phy_reset, |
73 | }; |
74 | |
75 | static int |
76 | urlphy_match(device_t parent, cfdata_t match, void *aux) |
77 | { |
78 | struct mii_attach_args *ma = aux; |
79 | |
80 | /* |
81 | * RTL8150 reports OUI == 0, MODEL == 0 |
82 | */ |
83 | if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && |
84 | MII_MODEL(ma->mii_id2) != 0) |
85 | return (0); |
86 | |
87 | /* |
88 | * Make sure the parent is an 'url' device. |
89 | */ |
90 | if (!device_is_a(parent, "url" )) |
91 | return(0); |
92 | |
93 | return (10); |
94 | } |
95 | |
96 | static void |
97 | urlphy_attach(device_t parent, device_t self, void *aux) |
98 | { |
99 | struct mii_softc *sc = device_private(self); |
100 | struct mii_attach_args *ma = aux; |
101 | struct mii_data *mii = ma->mii_data; |
102 | |
103 | aprint_naive(": Media interface\n" ); |
104 | aprint_normal(": Realtek RTL8150L internal media interface\n" ); |
105 | |
106 | DPRINTF(("%s: %s: enter\n" , device_xname(self), __func__)); |
107 | |
108 | sc->mii_dev = self; |
109 | sc->mii_inst = mii->mii_instance; |
110 | sc->mii_phy = ma->mii_phyno; |
111 | sc->mii_funcs = &urlphy_funcs; |
112 | sc->mii_pdata = mii; |
113 | sc->mii_flags = mii->mii_flags; |
114 | sc->mii_anegticks = MII_ANEGTICKS_GIGE; |
115 | |
116 | /* Don't do loopback on this PHY. */ |
117 | sc->mii_flags |= MIIF_NOLOOP; |
118 | /* Don't do isolate on this PHY. */ |
119 | sc->mii_flags |= MIIF_NOISOLATE; |
120 | |
121 | if (mii->mii_instance != 0) { |
122 | aprint_error_dev(self, |
123 | "ignoring this PHY, non-zero instance\n" ); |
124 | return; |
125 | } |
126 | PHY_RESET(sc); |
127 | |
128 | sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
129 | aprint_normal_dev(self, "" ); |
130 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
131 | aprint_error("no media present" ); |
132 | else |
133 | mii_phy_add_media(sc); |
134 | aprint_normal("\n" ); |
135 | } |
136 | |
137 | static int |
138 | urlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
139 | { |
140 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
141 | int reg; |
142 | |
143 | DPRINTF(("%s: %s: enter\n" , device_xname(sc->mii_dev), __func__)); |
144 | |
145 | switch (cmd) { |
146 | case MII_POLLSTAT: |
147 | /* |
148 | * If we're not polling our PHY instance, just return. |
149 | */ |
150 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
151 | return (0); |
152 | break; |
153 | |
154 | case MII_MEDIACHG: |
155 | /* |
156 | * If we're not currently selected, just return. |
157 | */ |
158 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
159 | return (0); |
160 | |
161 | /* If the interface is not up, don't do anything. */ |
162 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
163 | break; |
164 | |
165 | mii_phy_setmedia(sc); |
166 | break; |
167 | |
168 | case MII_TICK: |
169 | /* |
170 | * If we're not currently selected, just return. |
171 | */ |
172 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
173 | return (0); |
174 | |
175 | /* Just bail now if the interface is down. */ |
176 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
177 | return (0); |
178 | |
179 | /* |
180 | * If we're not doing autonegotiation, we don't need to do |
181 | * any extra work here. However, we need to check the link |
182 | * status so we can generate an announcement if the status |
183 | * changes. |
184 | */ |
185 | if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) |
186 | break; |
187 | |
188 | /* Read the status register twice; MSR_LINK is latch-low. */ |
189 | reg = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); |
190 | if (reg & URLPHY_MSR_LINK) { |
191 | /* |
192 | * Reset autonegotiation timer to 0 in case the link |
193 | * goes down in the next tick. |
194 | */ |
195 | sc->mii_ticks = 0; |
196 | /* See above. */ |
197 | break; |
198 | } |
199 | |
200 | /* |
201 | * mii_ticks == 0 means it's the first tick after changing the |
202 | * media or the link became down since the last tick (see |
203 | * above), so break to update the status. |
204 | */ |
205 | if (sc->mii_ticks++ == 0) |
206 | break; |
207 | |
208 | /* |
209 | * Only retry autonegotiation every N seconds. |
210 | */ |
211 | KASSERT(sc->mii_anegticks != 0); |
212 | if (sc->mii_ticks <= sc->mii_anegticks) |
213 | return (0); |
214 | |
215 | PHY_RESET(sc); |
216 | |
217 | if (mii_phy_auto(sc, 0) == EJUSTRETURN) |
218 | return (0); |
219 | |
220 | break; |
221 | |
222 | case MII_DOWN: |
223 | mii_phy_down(sc); |
224 | return (0); |
225 | } |
226 | |
227 | /* Update the media status. */ |
228 | mii_phy_status(sc); |
229 | |
230 | /* Callback if something changed. */ |
231 | mii_phy_update(sc, cmd); |
232 | |
233 | return (0); |
234 | } |
235 | |
236 | static void |
237 | urlphy_status(struct mii_softc *sc) |
238 | { |
239 | struct mii_data *mii = sc->mii_pdata; |
240 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
241 | int msr, bmsr, bmcr; |
242 | |
243 | DPRINTF(("%s: %s: enter\n" , device_xname(sc->mii_dev), __func__)); |
244 | |
245 | mii->mii_media_status = IFM_AVALID; |
246 | mii->mii_media_active = IFM_ETHER; |
247 | |
248 | /* |
249 | * The link status bit is not exist in the BMSR register, |
250 | * so we need to read the MSR register to get link status. |
251 | */ |
252 | msr = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); |
253 | if (msr & URLPHY_MSR_LINK) |
254 | mii->mii_media_status |= IFM_ACTIVE; |
255 | |
256 | DPRINTF(("%s: %s: link %s\n" , device_xname(sc->mii_dev), __func__, |
257 | mii->mii_media_status & IFM_ACTIVE ? "up" : "down" )); |
258 | |
259 | bmcr = PHY_READ(sc, MII_BMCR); |
260 | if (bmcr & BMCR_AUTOEN) { |
261 | bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); |
262 | if ((bmsr & BMSR_ACOMP) == 0) { |
263 | /* Erg, still trying, I guess... */ |
264 | mii->mii_media_active |= IFM_NONE; |
265 | return; |
266 | } |
267 | |
268 | if (msr & URLPHY_MSR_SPEED_100) |
269 | mii->mii_media_active |= IFM_100_TX; |
270 | else |
271 | mii->mii_media_active |= IFM_10_T; |
272 | |
273 | if (msr & URLPHY_MSR_DUPLEX) |
274 | mii->mii_media_active |= IFM_FDX; |
275 | else |
276 | mii->mii_media_active |= IFM_HDX; |
277 | } else |
278 | mii->mii_media_active = ife->ifm_media; |
279 | } |
280 | |