Annotation of sys/dev/mii/icsphy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: icsphy.c,v 1.18 2006/12/27 19:11:08 kettenis Exp $ */
2: /* $NetBSD: icsphy.c,v 1.17 2000/02/02 23:34:56 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10: * NASA Ames Research Center.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: /*
42: * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
43: *
44: * Redistribution and use in source and binary forms, with or without
45: * modification, are permitted provided that the following conditions
46: * are met:
47: * 1. Redistributions of source code must retain the above copyright
48: * notice, this list of conditions and the following disclaimer.
49: * 2. Redistributions in binary form must reproduce the above copyright
50: * notice, this list of conditions and the following disclaimer in the
51: * documentation and/or other materials provided with the distribution.
52: * 3. All advertising materials mentioning features or use of this software
53: * must display the following acknowledgement:
54: * This product includes software developed by Manuel Bouyer.
55: * 4. The name of the author may not be used to endorse or promote products
56: * derived from this software without specific prior written permission.
57: *
58: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
59: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
62: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
64: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
65: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
67: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68: */
69:
70: /*
71: * driver for Integrated Circuit Systems' ICS1890 ethernet 10/100 PHY
72: * and its successor ICS1892
73: * datasheet from www.icst.com
74: */
75:
76: #include <sys/param.h>
77: #include <sys/systm.h>
78: #include <sys/kernel.h>
79: #include <sys/device.h>
80: #include <sys/socket.h>
81:
82: #include <net/if.h>
83: #include <net/if_media.h>
84:
85: #include <dev/mii/mii.h>
86: #include <dev/mii/miivar.h>
87: #include <dev/mii/miidevs.h>
88:
89: #include <dev/mii/icsphyreg.h>
90:
91: int icsphymatch(struct device *, void *, void *);
92: void icsphyattach(struct device *, struct device *, void *);
93:
94: struct cfattach icsphy_ca = {
95: sizeof(struct mii_softc), icsphymatch, icsphyattach, mii_phy_detach,
96: mii_phy_activate
97: };
98:
99: struct cfdriver icsphy_cd = {
100: NULL, "icsphy", DV_DULL
101: };
102:
103: int icsphy_service(struct mii_softc *, struct mii_data *, int);
104: void icsphy_reset(struct mii_softc *);
105: void icsphy_status(struct mii_softc *);
106:
107: const struct mii_phy_funcs icsphy_funcs = {
108: icsphy_service, icsphy_status, icsphy_reset,
109: };
110:
111: static const struct mii_phydesc icsphys[] = {
112: { MII_OUI_xxICS, MII_MODEL_xxICS_1890,
113: MII_STR_xxICS_1890 },
114: { MII_OUI_xxICS, MII_MODEL_xxICS_1892,
115: MII_STR_xxICS_1892 },
116: { MII_OUI_xxICS, MII_MODEL_xxICS_1893,
117: MII_STR_xxICS_1893 },
118:
119: { 0, 0,
120: NULL },
121:
122: };
123:
124: int
125: icsphymatch(struct device *parent, void *match, void *aux)
126: {
127: struct mii_attach_args *ma = aux;
128:
129: if (mii_phy_match(ma, icsphys) != NULL)
130: return (10);
131:
132: return (0);
133: }
134:
135: void
136: icsphyattach(struct device *parent, struct device *self, void *aux)
137: {
138: struct mii_softc *sc = (struct mii_softc *)self;
139: struct mii_attach_args *ma = aux;
140: struct mii_data *mii = ma->mii_data;
141: const struct mii_phydesc *mpd;
142:
143: mpd = mii_phy_match(ma, icsphys);
144: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
145:
146: sc->mii_inst = mii->mii_instance;
147: sc->mii_phy = ma->mii_phyno;
148: sc->mii_funcs = &icsphy_funcs;
149: sc->mii_pdata = mii;
150: sc->mii_flags = ma->mii_flags;
151:
152: PHY_RESET(sc);
153:
154: sc->mii_capabilities =
155: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
156: if (sc->mii_capabilities & BMSR_MEDIAMASK)
157: mii_phy_add_media(sc);
158: }
159:
160: int
161: icsphy_service(sc, mii, cmd)
162: struct mii_softc *sc;
163: struct mii_data *mii;
164: int cmd;
165: {
166: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
167: int reg;
168:
169: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
170: return (ENXIO);
171:
172: switch (cmd) {
173: case MII_POLLSTAT:
174: /*
175: * If we're not polling our PHY instance, just return.
176: */
177: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
178: return (0);
179: break;
180:
181: case MII_MEDIACHG:
182: /*
183: * If the media indicates a different PHY instance,
184: * isolate ourselves.
185: */
186: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
187: reg = PHY_READ(sc, MII_BMCR);
188: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
189: return (0);
190: }
191:
192: /*
193: * If the interface is not up, don't do anything.
194: */
195: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
196: break;
197:
198: mii_phy_setmedia(sc);
199: break;
200:
201: case MII_TICK:
202: /*
203: * If we're not currently selected, just return.
204: */
205: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
206: return (0);
207:
208: if (mii_phy_tick(sc) == EJUSTRETURN)
209: return (0);
210: break;
211:
212: case MII_DOWN:
213: mii_phy_down(sc);
214: return (0);
215: }
216:
217: /* Update the media status. */
218: mii_phy_status(sc);
219:
220: /* Callback if something changed. */
221: mii_phy_update(sc, cmd);
222: return (0);
223: }
224:
225: void
226: icsphy_status(sc)
227: struct mii_softc *sc;
228: {
229: struct mii_data *mii = sc->mii_pdata;
230: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
231: int bmcr, qpr;
232:
233: mii->mii_media_status = IFM_AVALID;
234: mii->mii_media_active = IFM_ETHER;
235:
236: /*
237: * Don't get link from the BMSR. It's available in the QPR,
238: * and we have to read it twice to unlatch it anyhow. This
239: * gives us fewer register reads.
240: */
241: qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* unlatch */
242: qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* real value */
243:
244: if (qpr & QPR_LINK)
245: mii->mii_media_status |= IFM_ACTIVE;
246:
247: bmcr = PHY_READ(sc, MII_BMCR);
248: if (bmcr & BMCR_ISO) {
249: mii->mii_media_active |= IFM_NONE;
250: mii->mii_media_status = 0;
251: return;
252: }
253:
254: if (bmcr & BMCR_LOOP)
255: mii->mii_media_active |= IFM_LOOP;
256:
257: if (bmcr & BMCR_AUTOEN) {
258: if ((qpr & QPR_ACOMP) == 0) {
259: /* Erg, still trying, I guess... */
260: mii->mii_media_active |= IFM_NONE;
261: return;
262: }
263:
264: if (qpr & QPR_SPEED)
265: mii->mii_media_active |= IFM_100_TX;
266: else
267: mii->mii_media_active |= IFM_10_T;
268:
269: if (qpr & QPR_FDX)
270: mii->mii_media_active |= IFM_FDX;
271: else
272: mii->mii_media_active |= IFM_HDX;
273: } else
274: mii->mii_media_active = ife->ifm_media;
275: }
276:
277: void
278: icsphy_reset(sc)
279: struct mii_softc *sc;
280: {
281:
282: mii_phy_reset(sc);
283: PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_10TPROT|ECR2_Q10T);
284:
285: /*
286: * XXX the ICS1892 doesn't set the BMCR properly after
287: * XXX reset, which breaks autonegotiation.
288: */
289: PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
290:
291: }
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