Annotation of sys/dev/mii/gentbi.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: gentbi.c,v 1.3 2005/03/26 04:40:09 krw Exp $ */
2: /* $NetBSD: gentbi.c,v 1.12 2004/04/11 15:40:56 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1998, 1999, 2000, 2001 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 generic ten-bit (1000BASE-SX) interfaces, built in to
72: * many Gigabit Ethernet chips.
73: *
74: * All we have to do here is correctly report speed and duplex.
75: */
76:
77: #if 0
78: #include <sys/cdefs.h>
79: __KERNEL_RCSID(0, "$NetBSD: gentbi.c,v 1.12 2004/04/11 15:40:56 thorpej Exp $");
80: #endif
81:
82: #include <sys/param.h>
83: #include <sys/systm.h>
84: #include <sys/kernel.h>
85: #include <sys/device.h>
86: #include <sys/socket.h>
87: #include <sys/errno.h>
88:
89: #include <net/if.h>
90: #include <net/if_media.h>
91:
92: #include <dev/mii/mii.h>
93: #include <dev/mii/miivar.h>
94: #include <dev/mii/miidevs.h>
95:
96: int gentbimatch(struct device *, void *, void *);
97: void gentbiattach(struct device *, struct device *, void *);
98:
99: struct cfattach gentbi_ca = {
100: sizeof(struct mii_softc), gentbimatch, gentbiattach,
101: mii_phy_detach, mii_phy_activate
102: };
103:
104: struct cfdriver gentbi_cd = {
105: NULL, "gentbi", DV_DULL
106: };
107:
108: int gentbi_service(struct mii_softc *, struct mii_data *, int);
109: void gentbi_status(struct mii_softc *);
110:
111: const struct mii_phy_funcs gentbi_funcs = {
112: gentbi_service, gentbi_status, mii_phy_reset,
113: };
114:
115: int
116: gentbimatch(struct device *parent, void *match, void *aux)
117: {
118: struct mii_attach_args *ma = aux;
119: struct mii_data *mii = ma->mii_data;
120: int bmsr, extsr;
121:
122: /*
123: * We match as a generic TBI if:
124: *
125: * - There is no media in the BMSR.
126: * - EXTSR has only 1000X.
127: */
128: bmsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR);
129: if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
130: return (0);
131:
132: extsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR);
133: if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
134: return (0);
135:
136: if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
137: /*
138: * We think this is a generic TBI. Return a match
139: * priority higher than ukphy, but lower than what
140: * specific drivers will return.
141: */
142: return (2);
143: }
144:
145: return (0);
146: }
147:
148: void
149: gentbiattach(struct device *parent, struct device *self, void *aux)
150: {
151: struct mii_softc *sc = (struct mii_softc *)self;
152: struct mii_attach_args *ma = aux;
153: struct mii_data *mii = ma->mii_data;
154:
155: printf(": Generic ten-bit interface, rev. %d\n",
156: MII_REV(ma->mii_id2));
157:
158: sc->mii_inst = mii->mii_instance;
159: sc->mii_phy = ma->mii_phyno;
160: sc->mii_funcs = &gentbi_funcs;
161: sc->mii_pdata = mii;
162: sc->mii_flags = ma->mii_flags;
163: sc->mii_anegticks = MII_ANEGTICKS;
164:
165: PHY_RESET(sc);
166:
167: /*
168: * Mask out all media in the BMSR. We only are really interested
169: * in "auto".
170: */
171: sc->mii_capabilities =
172: PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
173: if (sc->mii_capabilities & BMSR_EXTSTAT)
174: sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
175:
176: if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
177: (sc->mii_extcapabilities & EXTSR_MEDIAMASK))
178: mii_phy_add_media(sc);
179: }
180:
181: int
182: gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
183: {
184: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
185: int reg;
186:
187: switch (cmd) {
188: case MII_POLLSTAT:
189: /*
190: * If we're not polling our PHY instance, just return.
191: */
192: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
193: return (0);
194: break;
195:
196: case MII_MEDIACHG:
197: /*
198: * If the media indicates a different PHY instance,
199: * isolate ourselves.
200: */
201: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
202: reg = PHY_READ(sc, MII_BMCR);
203: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
204: return (0);
205: }
206:
207: /*
208: * If the interface is not up, don't do anything.
209: */
210: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
211: break;
212:
213: mii_phy_setmedia(sc);
214: break;
215:
216: case MII_TICK:
217: /*
218: * If we're not currently selected, just return.
219: */
220: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
221: return (0);
222:
223: if (mii_phy_tick(sc) == EJUSTRETURN)
224: return (0);
225: break;
226:
227: case MII_DOWN:
228: mii_phy_down(sc);
229: return (0);
230: }
231:
232: /* Update the media status. */
233: mii_phy_status(sc);
234:
235: /* Callback if something changed. */
236: mii_phy_update(sc, cmd);
237: return (0);
238: }
239:
240: void
241: gentbi_status(struct mii_softc *sc)
242: {
243: struct mii_data *mii = sc->mii_pdata;
244: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
245: int bmsr, bmcr, anlpar;
246:
247: mii->mii_media_status = IFM_AVALID;
248: mii->mii_media_active = IFM_ETHER;
249:
250: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
251:
252: if (bmsr & BMSR_LINK)
253: mii->mii_media_status |= IFM_ACTIVE;
254:
255: bmcr = PHY_READ(sc, MII_BMCR);
256: if (bmcr & BMCR_ISO) {
257: mii->mii_media_active |= IFM_NONE;
258: mii->mii_media_status = 0;
259: return;
260: }
261:
262: if (bmcr & BMCR_LOOP)
263: mii->mii_media_active |= IFM_LOOP;
264:
265: if (bmcr & BMCR_AUTOEN) {
266: /*
267: * The media status bits are only valid of autonegotiation
268: * has completed (or it's disabled).
269: */
270: if ((bmsr & BMSR_ACOMP) == 0) {
271: /* Erg, still trying, I guess... */
272: mii->mii_media_active |= IFM_NONE;
273: return;
274: }
275:
276: /*
277: * The media is always 1000baseSX. Check the ANLPAR to
278: * see if we're doing full-duplex.
279: */
280: mii->mii_media_active |= IFM_1000_SX;
281:
282: anlpar = PHY_READ(sc, MII_ANLPAR);
283: if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
284: (anlpar & ANLPAR_X_FD) != 0)
285: mii->mii_media_active |=
286: IFM_FDX;
287: } else
288: mii->mii_media_active = ife->ifm_media;
289: }
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