Annotation of sys/dev/mii/amphy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: amphy.c,v 1.15 2006/12/31 15:04:33 krw Exp $ */
2:
3: /*
4: * Copyright (c) 1997, 1998, 1999
5: * Bill Paul <wpaul@ee.columbia.edu>. 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. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by Bill Paul.
18: * 4. Neither the name of the author nor the names of any co-contributors
19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32: * THE POSSIBILITY OF SUCH DAMAGE.
33: *
34: * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $
35: */
36:
37: /*
38: * driver for AMD AM79c873 PHYs
39: * This driver also works for the Davicom DM9101 PHY, which appears to
40: * be an AM79c873 workalike.
41: */
42:
43: #include <sys/param.h>
44: #include <sys/systm.h>
45: #include <sys/kernel.h>
46: #include <sys/device.h>
47: #include <sys/socket.h>
48:
49: #include <net/if.h>
50: #include <net/if_media.h>
51:
52: #include <dev/mii/mii.h>
53: #include <dev/mii/miivar.h>
54: #include <dev/mii/miidevs.h>
55:
56: #include <dev/mii/amphyreg.h>
57:
58: int amphymatch(struct device *, void *, void *);
59: void amphyattach(struct device *, struct device *, void *);
60:
61: struct cfattach amphy_ca = {
62: sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach,
63: mii_phy_activate
64: };
65:
66: struct cfdriver amphy_cd = {
67: NULL, "amphy", DV_DULL
68: };
69:
70: int amphy_service(struct mii_softc *, struct mii_data *, int);
71: void amphy_status(struct mii_softc *);
72:
73: const struct mii_phy_funcs amphy_funcs = {
74: amphy_service, amphy_status, mii_phy_reset,
75: };
76:
77: static const struct mii_phydesc amphys[] = {
78: { MII_OUI_xxAMD, MII_MODEL_xxAMD_79C873,
79: MII_STR_xxAMD_79C873 },
80: { MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101,
81: MII_STR_xxDAVICOM_DM9101 },
82: { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9102,
83: MII_STR_DAVICOM_DM9102 },
84: { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9601,
85: MII_STR_DAVICOM_DM9601 },
86: { MII_OUI_xxALTIMA, MII_MODEL_AMD_79C875phy,
87: MII_STR_AMD_79C875phy },
88:
89: { 0, 0,
90: NULL },
91: };
92:
93: int
94: amphymatch(struct device *parent, void *match, void *aux)
95: {
96: struct mii_attach_args *ma = aux;
97:
98: if (mii_phy_match(ma, amphys) != NULL)
99: return (10);
100:
101: return (0);
102: }
103:
104: void
105: amphyattach(struct device *parent, struct device *self, void *aux)
106: {
107: struct mii_softc *sc = (struct mii_softc *)self;
108: struct mii_attach_args *ma = aux;
109: struct mii_data *mii = ma->mii_data;
110: const struct mii_phydesc *mpd;
111:
112: mpd = mii_phy_match(ma, amphys);
113: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
114:
115: sc->mii_inst = mii->mii_instance;
116: sc->mii_phy = ma->mii_phyno;
117: sc->mii_funcs = &hy_funcs;
118: sc->mii_pdata = mii;
119: sc->mii_flags = ma->mii_flags;
120:
121: sc->mii_flags |= MIIF_NOISOLATE;
122:
123: PHY_RESET(sc);
124:
125: sc->mii_capabilities =
126: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
127: if (sc->mii_capabilities & BMSR_MEDIAMASK)
128: mii_phy_add_media(sc);
129: }
130:
131: int
132: amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
133: {
134: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
135: int reg;
136:
137: switch (cmd) {
138: case MII_POLLSTAT:
139: /*
140: * If we're not polling our PHY instance, just return.
141: */
142: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
143: return (0);
144: break;
145:
146: case MII_MEDIACHG:
147: /*
148: * If the media indicates a different PHY instance,
149: * isolate ourselves.
150: */
151: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
152: reg = PHY_READ(sc, MII_BMCR);
153: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
154: return (0);
155: }
156:
157: /*
158: * If the interface is not up, don't do anything.
159: */
160: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
161: break;
162:
163: mii_phy_setmedia(sc);
164: break;
165:
166: case MII_TICK:
167: /*
168: * If we're not currently selected, just return.
169: */
170: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
171: return (0);
172:
173: if (mii_phy_tick(sc) == EJUSTRETURN)
174: return (0);
175: break;
176: case MII_DOWN:
177: mii_phy_down(sc);
178: return (0);
179: }
180:
181: /* Update the media status. */
182: mii_phy_status(sc);
183:
184: /* Callback if something changed. */
185: mii_phy_update(sc, cmd);
186: return (0);
187: }
188:
189: void
190: amphy_status(struct mii_softc *sc)
191: {
192: struct mii_data *mii = sc->mii_pdata;
193: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
194: int bmsr, bmcr, par, anlpar;
195:
196: mii->mii_media_status = IFM_AVALID;
197: mii->mii_media_active = IFM_ETHER;
198:
199: bmsr = PHY_READ(sc, MII_BMSR) |
200: PHY_READ(sc, MII_BMSR);
201: if (bmsr & BMSR_LINK)
202: mii->mii_media_status |= IFM_ACTIVE;
203:
204: bmcr = PHY_READ(sc, MII_BMCR);
205: if (bmcr & BMCR_ISO) {
206: mii->mii_media_active |= IFM_NONE;
207: mii->mii_media_status = 0;
208: return;
209: }
210:
211: if (bmcr & BMCR_LOOP)
212: mii->mii_media_active |= IFM_LOOP;
213:
214: if (bmcr & BMCR_AUTOEN) {
215: /*
216: * The PAR status bits are only valid of autonegotiation
217: * has completed (or it's disabled).
218: */
219: if ((bmsr & BMSR_ACOMP) == 0) {
220: /* Erg, still trying, I guess... */
221: mii->mii_media_active |= IFM_NONE;
222: return;
223: }
224:
225: if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
226: anlpar = PHY_READ(sc, MII_ANAR) &
227: PHY_READ(sc, MII_ANLPAR);
228: if (anlpar & ANLPAR_T4)
229: mii->mii_media_active |= IFM_100_T4|IFM_HDX;
230: else if (anlpar & ANLPAR_TX_FD)
231: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
232: else if (anlpar & ANLPAR_TX)
233: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
234: else if (anlpar & ANLPAR_10_FD)
235: mii->mii_media_active |= IFM_10_T|IFM_FDX;
236: else if (anlpar & ANLPAR_10)
237: mii->mii_media_active |= IFM_10_T|IFM_HDX;
238: else
239: mii->mii_media_active |= IFM_NONE;
240: return;
241: }
242:
243: /*
244: * Link partner is not capable of autonegotiation.
245: */
246: par = PHY_READ(sc, MII_AMPHY_DSCSR);
247: if (par & DSCSR_100FDX)
248: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
249: else if (par & DSCSR_100HDX)
250: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
251: else if (par & DSCSR_10FDX)
252: mii->mii_media_active |= IFM_10_T|IFM_HDX;
253: else if (par & DSCSR_10HDX)
254: mii->mii_media_active |= IFM_10_T|IFM_HDX;
255: } else
256: mii->mii_media_active = ife->ifm_media;
257: }
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