Annotation of sys/dev/mii/urlphy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: urlphy.c,v 1.12 2006/12/27 19:11:09 kettenis Exp $ */
2: /* $NetBSD: urlphy.c,v 1.1 2002/03/28 21:07:53 ichiro Exp $ */
3: /*
4: * Copyright (c) 2001, 2002
5: * Shingo WATANABE <nabe@nabechan.org>. 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: * 3. Neither the name of the author nor the names of any co-contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: *
31: */
32:
33: /*
34: * driver for Realtek RL8150L internal phy
35: */
36:
37: #include <sys/param.h>
38: #include <sys/systm.h>
39: #include <sys/kernel.h>
40: #include <sys/device.h>
41: #include <sys/socket.h>
42:
43: #include <net/if.h>
44: #include <net/if_media.h>
45:
46: #include <dev/mii/mii.h>
47: #include <dev/mii/miivar.h>
48: #include <dev/mii/miidevs.h>
49: #include <dev/mii/urlphyreg.h>
50:
51: #define URLPHY_DEBUG 0
52: #ifdef URLPHY_DEBUG
53: #define DPRINTF(x) if (urlphydebug) printf x
54: #define DPRINTFN(n,x) if (urlphydebug>(n)) printf x
55: int urlphydebug = URLPHY_DEBUG;
56: #else
57: #define DPRINTF(x)
58: #define DPRINTFN(n,x)
59: #endif
60:
61: int urlphy_match(struct device *, void *, void *);
62: void urlphy_attach(struct device *, struct device *, void *);
63:
64: struct cfattach urlphy_ca = {
65: sizeof(struct mii_softc), urlphy_match, urlphy_attach, mii_phy_detach,
66: mii_phy_activate
67: };
68:
69: struct cfdriver urlphy_cd = {
70: NULL, "urlphy", DV_DULL
71: };
72:
73: int urlphy_service(struct mii_softc *, struct mii_data *, int);
74: void urlphy_status(struct mii_softc *);
75:
76: const struct mii_phy_funcs urlphy_funcs = {
77: urlphy_service, urlphy_status, mii_phy_reset,
78: };
79:
80: int
81: urlphy_match(struct device *parent, void *match, void *aux)
82: {
83: struct mii_attach_args *ma = aux;
84:
85: /*
86: * RTL8150 reports OUT == 0, MODEL == 0
87: */
88: if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 &&
89: MII_MODEL(ma->mii_id2) != 0)
90: return (0);
91:
92: /*
93: * Make sure the parent is an 'url' device.
94: */
95: if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "url") != 0)
96: return (0);
97:
98: return (10);
99: }
100:
101: void
102: urlphy_attach(struct device *parent, struct device *self, void *aux)
103: {
104: struct mii_softc *sc = (struct mii_softc *)self;
105: struct mii_attach_args *ma = aux;
106: struct mii_data *mii = ma->mii_data;
107:
108: printf(": RTL internal phy\n");
109:
110: DPRINTF(("%s: %s: enter\n", sc->mii_dev.dv_xname, __func__));
111:
112: sc->mii_inst = mii->mii_instance;
113: sc->mii_phy = ma->mii_phyno;
114: sc->mii_funcs = &urlphy_funcs;
115: sc->mii_pdata = mii;
116: sc->mii_flags = ma->mii_flags;
117: sc->mii_anegticks = MII_ANEGTICKS_GIGE;
118:
119: /* Don't do loopback on this PHY. */
120: sc->mii_flags |= MIIF_NOLOOP;
121: /* Don't do isolate on this PHY. */
122: sc->mii_flags |= MIIF_NOISOLATE;
123:
124: if (mii->mii_instance != 0) {
125: printf("%s: ignoring this PHY, non-zero instance\n",
126: sc->mii_dev.dv_xname);
127: return;
128: }
129: PHY_RESET(sc);
130:
131: sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
132: if (sc->mii_capabilities & BMSR_MEDIAMASK)
133: mii_phy_add_media(sc);
134: }
135:
136: int
137: urlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
138: {
139: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
140: int reg;
141:
142: DPRINTF(("%s: %s: enter\n", sc->mii_dev.dv_xname, __func__));
143:
144: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
145: return (ENXIO);
146:
147: switch (cmd) {
148: case MII_POLLSTAT:
149: /*
150: * If we're not polling our PHY instance, just return.
151: */
152: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
153: return (0);
154: break;
155:
156: case MII_MEDIACHG:
157: /*
158: * If we're not currently selected, just return.
159: */
160: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
161: return (0);
162:
163: /* If the interface is not up, don't do anything. */
164: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
165: break;
166:
167: mii_phy_setmedia(sc);
168: break;
169:
170: case MII_TICK:
171: /*
172: * If we're not currently selected, just return.
173: */
174: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
175: return (0);
176:
177: /* Just bail now if the interface is down. */
178: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
179: return (0);
180:
181: /*
182: * If we're not doing autonegotiation, we don't need to do
183: * any extra work here. However, we need to check the link
184: * status so we can generate an announcement if the status
185: * changes.
186: */
187: if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
188: return (0);
189:
190: /* Read the status register twice; MSR_LINK is latch-low. */
191: reg = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR);
192: if (reg & URLPHY_MSR_LINK)
193: return (0);
194:
195: /*
196: * Only retry autonegotiation every mii_anegticks seconds.
197: */
198: if (++sc->mii_ticks <= sc->mii_anegticks)
199: return (0);
200:
201: sc->mii_ticks = 0;
202: PHY_RESET(sc);
203:
204: if (mii_phy_auto(sc, 0) == EJUSTRETURN)
205: return (0);
206:
207: break;
208:
209: case MII_DOWN:
210: mii_phy_down(sc);
211: return (0);
212: }
213:
214: /* Update the media status. */
215: mii_phy_status(sc);
216:
217: /* Callback if something changed. */
218: mii_phy_update(sc, cmd);
219:
220: return (0);
221: }
222:
223: void
224: urlphy_status(struct mii_softc *sc)
225: {
226: struct mii_data *mii = sc->mii_pdata;
227: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
228: int msr, bmsr, bmcr;
229:
230: DPRINTF(("%s: %s: enter\n", sc->mii_dev.dv_xname, __func__));
231:
232: mii->mii_media_status = IFM_AVALID;
233: mii->mii_media_active = IFM_ETHER;
234:
235: /*
236: * The link status bit is not exist in the BMSR register,
237: * so we need to read the MSR register to get link status.
238: */
239: msr = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR);
240: if (msr & URLPHY_MSR_LINK)
241: mii->mii_media_status |= IFM_ACTIVE;
242:
243: DPRINTF(("%s: %s: link %s\n", sc->mii_dev.dv_xname, __func__,
244: mii->mii_media_status & IFM_ACTIVE ? "up" : "down"));
245:
246: bmcr = PHY_READ(sc, MII_BMCR);
247: if (bmcr & BMCR_AUTOEN) {
248: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
249: if ((bmsr & BMSR_ACOMP) == 0) {
250: /* Erg, still trying, I guess... */
251: mii->mii_media_active |= IFM_NONE;
252: return;
253: }
254:
255: if (msr & URLPHY_MSR_SPEED_100)
256: mii->mii_media_active |= IFM_100_TX;
257: else
258: mii->mii_media_active |= IFM_10_T;
259:
260: if (msr & URLPHY_MSR_DUPLEX)
261: mii->mii_media_active |= IFM_FDX;
262: else
263: mii->mii_media_active |= IFM_HDX;
264: } else
265: mii->mii_media_active = ife->ifm_media;
266: }
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