Annotation of sys/dev/mii/nsphy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: nsphy.c,v 1.20 2006/12/27 19:11:09 kettenis Exp $ */
2: /* $NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 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 National Semiconductor's DP83840A ethernet 10/100 PHY
72: * Data Sheet available from www.national.com
73: */
74:
75: #include <sys/param.h>
76: #include <sys/systm.h>
77: #include <sys/kernel.h>
78: #include <sys/device.h>
79: #include <sys/socket.h>
80: #include <sys/errno.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/nsphyreg.h>
90:
91: int nsphymatch(struct device *, void *, void *);
92: void nsphyattach(struct device *, struct device *, void *);
93:
94: struct cfattach nsphy_ca = {
95: sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach,
96: mii_phy_activate
97: };
98:
99: struct cfdriver nsphy_cd = {
100: NULL, "nsphy", DV_DULL
101: };
102:
103: int nsphy_service(struct mii_softc *, struct mii_data *, int);
104: void nsphy_status(struct mii_softc *);
105: void nsphy_reset(struct mii_softc *);
106:
107: const struct mii_phy_funcs nsphy_funcs = {
108: nsphy_service, nsphy_status, nsphy_reset,
109: };
110:
111: static const struct mii_phydesc nsphys[] = {
112: { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840,
113: MII_STR_NATSEMI_DP83840 },
114:
115: { 0, 0,
116: NULL },
117: };
118:
119: int
120: nsphymatch(struct device *parent, void *match, void *aux)
121: {
122: struct mii_attach_args *ma = aux;
123:
124: if (mii_phy_match(ma, nsphys) != NULL)
125: return (10);
126:
127: return (0);
128: }
129:
130: void
131: nsphyattach(struct device *parent, struct device *self, void *aux)
132: {
133: struct mii_softc *sc = (struct mii_softc *)self;
134: struct mii_attach_args *ma = aux;
135: struct mii_data *mii = ma->mii_data;
136: const struct mii_phydesc *mpd;
137:
138: mpd = mii_phy_match(ma, nsphys);
139: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
140:
141: sc->mii_inst = mii->mii_instance;
142: sc->mii_phy = ma->mii_phyno;
143: sc->mii_funcs = &nsphy_funcs;
144: sc->mii_pdata = mii;
145: sc->mii_flags = ma->mii_flags;
146: sc->mii_anegticks = MII_ANEGTICKS;
147:
148: PHY_RESET(sc);
149:
150: sc->mii_capabilities =
151: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
152: if (sc->mii_capabilities & BMSR_MEDIAMASK)
153: mii_phy_add_media(sc);
154: }
155:
156: int
157: nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
158: {
159: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
160: int reg;
161:
162: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
163: return (ENXIO);
164:
165: switch (cmd) {
166: case MII_POLLSTAT:
167: /*
168: * If we're not polling our PHY instance, just return.
169: */
170: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
171: return (0);
172: break;
173:
174: case MII_MEDIACHG:
175: /*
176: * If the media indicates a different PHY instance,
177: * isolate ourselves.
178: */
179: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
180: reg = PHY_READ(sc, MII_BMCR);
181: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
182: return (0);
183: }
184:
185: /*
186: * If the interface is not up, don't do anything.
187: */
188: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
189: break;
190:
191: reg = PHY_READ(sc, MII_NSPHY_PCR);
192:
193: /*
194: * Set up the PCR to use LED4 to indicate full-duplex
195: * in both 10baseT and 100baseTX modes.
196: */
197: reg |= PCR_LED4MODE;
198:
199: /*
200: * Make sure Carrier Integrity Monitor function is
201: * disabled (normal for Node operation, but sometimes
202: * it's not set?!)
203: */
204: reg |= PCR_CIMDIS;
205:
206: /*
207: * Make sure "force link good" is set to normal mode.
208: * It's only intended for debugging.
209: */
210: reg |= PCR_FLINK100;
211:
212: /*
213: * Mystery bits which are supposedly `reserved',
214: * but we seem to need to set them when the PHY
215: * is connected to some interfaces!
216: */
217: reg |= PCR_CONGCTRL | PCR_TXREADYSEL;
218:
219: PHY_WRITE(sc, MII_NSPHY_PCR, reg);
220:
221: mii_phy_setmedia(sc);
222: break;
223:
224: case MII_TICK:
225: /*
226: * If we're not currently selected, just return.
227: */
228: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
229: return (0);
230:
231: if (mii_phy_tick(sc) == EJUSTRETURN)
232: return (0);
233: break;
234:
235: case MII_DOWN:
236: mii_phy_down(sc);
237: return (0);
238: }
239:
240: /* Update the media status. */
241: mii_phy_status(sc);
242:
243: /* Callback if something changed. */
244: mii_phy_update(sc, cmd);
245: return (0);
246: }
247:
248: void
249: nsphy_status(struct mii_softc *sc)
250: {
251: struct mii_data *mii = sc->mii_pdata;
252: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
253: int bmsr, bmcr, par, anlpar;
254:
255: mii->mii_media_status = IFM_AVALID;
256: mii->mii_media_active = IFM_ETHER;
257:
258: bmsr = PHY_READ(sc, MII_BMSR) |
259: PHY_READ(sc, MII_BMSR);
260: if (bmsr & BMSR_LINK)
261: mii->mii_media_status |= IFM_ACTIVE;
262:
263: bmcr = PHY_READ(sc, MII_BMCR);
264: if (bmcr & BMCR_ISO) {
265: mii->mii_media_active |= IFM_NONE;
266: mii->mii_media_status = 0;
267: return;
268: }
269:
270: if (bmcr & BMCR_LOOP)
271: mii->mii_media_active |= IFM_LOOP;
272:
273: if (bmcr & BMCR_AUTOEN) {
274: /*
275: * The PAR status bits are only valid of autonegotiation
276: * has completed (or it's disabled).
277: */
278: if ((bmsr & BMSR_ACOMP) == 0) {
279: /* Erg, still trying, I guess... */
280: mii->mii_media_active |= IFM_NONE;
281: return;
282: }
283:
284: /*
285: * Argh. The PAR doesn't seem to indicate duplex mode
286: * properly! Determine media based on link partner's
287: * advertised capabilities.
288: */
289: if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
290: anlpar = PHY_READ(sc, MII_ANAR) &
291: PHY_READ(sc, MII_ANLPAR);
292: if (anlpar & ANLPAR_T4)
293: mii->mii_media_active |= IFM_100_T4;
294: else if (anlpar & ANLPAR_TX_FD)
295: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
296: else if (anlpar & ANLPAR_TX)
297: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
298: else if (anlpar & ANLPAR_10_FD)
299: mii->mii_media_active |= IFM_10_T|IFM_FDX;
300: else if (anlpar & ANLPAR_10)
301: mii->mii_media_active |= IFM_10_T|IFM_HDX;
302: else
303: mii->mii_media_active |= IFM_NONE;
304: return;
305: }
306:
307: /*
308: * Link partner is not capable of autonegotiation.
309: * We will never be in full-duplex mode if this is
310: * the case, so reading the PAR is OK.
311: */
312: par = PHY_READ(sc, MII_NSPHY_PAR);
313: if (par & PAR_10)
314: mii->mii_media_active |= IFM_10_T;
315: else
316: mii->mii_media_active |= IFM_100_TX;
317: mii->mii_media_active |= IFM_HDX;
318: } else
319: mii->mii_media_active = ife->ifm_media;
320: }
321:
322: void
323: nsphy_reset(struct mii_softc *sc)
324: {
325: int anar;
326:
327: mii_phy_reset(sc);
328: anar = PHY_READ(sc, MII_ANAR);
329: anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR));
330: PHY_WRITE(sc, MII_ANAR, anar);
331: }
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