Annotation of sys/dev/mii/mii.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mii.c,v 1.18 2005/07/23 01:42:16 brad Exp $ */
2: /* $NetBSD: mii.c,v 1.19 2000/02/02 17:09:44 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1998, 2000 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: * MII bus layer, glues MII-capable network interface drivers to sharable
43: * PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
44: * plus some NetBSD extensions.
45: */
46:
47: #include <sys/param.h>
48: #include <sys/device.h>
49: #include <sys/systm.h>
50: #include <sys/socket.h>
51:
52: #include <net/if.h>
53: #include <net/if_media.h>
54:
55: #include <dev/mii/mii.h>
56: #include <dev/mii/miivar.h>
57:
58: int mii_print(void *, const char *);
59: int mii_submatch(struct device *, void *, void *);
60:
61: #define MIICF_PHY 0 /* cf_loc index */
62: #define MIICF_PHY_DEFAULT (-1) /* default phy device */
63:
64: /*
65: * Helper function used by network interface drivers, attaches PHYs
66: * to the network interface driver parent.
67: */
68: void
69: mii_attach(struct device *parent, struct mii_data *mii, int capmask,
70: int phyloc, int offloc, int flags)
71: {
72: struct mii_attach_args ma;
73: struct mii_softc *child;
74: int bmsr, offset = 0;
75: int phymin, phymax;
76:
77: if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY)
78: panic("mii_attach: phyloc and offloc specified");
79:
80: if (phyloc == MII_PHY_ANY) {
81: phymin = 0;
82: phymax = MII_NPHY - 1;
83: } else
84: phymin = phymax = phyloc;
85:
86: if ((mii->mii_flags & MIIF_INITDONE) == 0) {
87: LIST_INIT(&mii->mii_phys);
88: mii->mii_flags |= MIIF_INITDONE;
89: }
90:
91: for (ma.mii_phyno = phymin; ma.mii_phyno <= phymax; ma.mii_phyno++) {
92: /*
93: * Make sure we haven't already configured a PHY at this
94: * address. This allows mii_attach() to be called
95: * multiple times.
96: */
97: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
98: child = LIST_NEXT(child, mii_list)) {
99: if (child->mii_phy == ma.mii_phyno) {
100: /*
101: * Yes, there is already something
102: * configured at this address.
103: */
104: offset++;
105: continue;
106: }
107: }
108:
109: /*
110: * Check to see if there is a PHY at this address. Note,
111: * many braindead PHYs report 0/0 in their ID registers,
112: * so we test for media in the BMSR.
113: */
114: bmsr = (*mii->mii_readreg)(parent, ma.mii_phyno, MII_BMSR);
115: if (bmsr == 0 || bmsr == 0xffff ||
116: (bmsr & (BMSR_MEDIAMASK|BMSR_EXTSTAT)) == 0) {
117: /* Assume no PHY at this address. */
118: continue;
119: }
120:
121: /*
122: * There is a PHY at this address. If we were given an
123: * `offset' locator, skip this PHY if it doesn't match.
124: */
125: if (offloc != MII_OFFSET_ANY && offloc != offset) {
126: offset++;
127: continue;
128: }
129:
130: /*
131: * Extract the IDs. Braindead PHYs will be handled by
132: * the `ukphy' driver, as we have no ID information to
133: * match on.
134: */
135: ma.mii_id1 = (*mii->mii_readreg)(parent, ma.mii_phyno,
136: MII_PHYIDR1);
137: ma.mii_id2 = (*mii->mii_readreg)(parent, ma.mii_phyno,
138: MII_PHYIDR2);
139:
140: ma.mii_data = mii;
141: ma.mii_capmask = capmask;
142: ma.mii_flags = flags | (mii->mii_flags & MIIF_INHERIT_MASK);
143:
144: if ((child = (struct mii_softc *)config_found_sm(parent, &ma,
145: mii_print, mii_submatch)) != NULL) {
146: /*
147: * Link it up in the parent's MII data.
148: */
149: LIST_INSERT_HEAD(&mii->mii_phys, child, mii_list);
150: child->mii_offset = offset;
151: mii->mii_instance++;
152: }
153: offset++;
154: }
155: }
156:
157: void
158: mii_activate(struct mii_data *mii, enum devact act, int phyloc, int offloc)
159: {
160: struct mii_softc *child;
161:
162: if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY)
163: panic("mii_activate: phyloc and offloc specified");
164:
165: if ((mii->mii_flags & MIIF_INITDONE) == 0)
166: return;
167:
168: for (child = LIST_FIRST(&mii->mii_phys);
169: child != NULL; child = LIST_NEXT(child, mii_list)) {
170: if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) {
171: if (phyloc != MII_PHY_ANY &&
172: phyloc != child->mii_phy)
173: continue;
174: if (offloc != MII_OFFSET_ANY &&
175: offloc != child->mii_offset)
176: continue;
177: }
178: switch (act) {
179: case DVACT_ACTIVATE:
180: panic("mii_activate: DVACT_ACTIVATE");
181: break;
182:
183: case DVACT_DEACTIVATE:
184: if (config_deactivate(&child->mii_dev) != 0)
185: panic("%s: config_activate(%d) failed",
186: child->mii_dev.dv_xname, act);
187: }
188: }
189: }
190:
191: void
192: mii_detach(struct mii_data *mii, int phyloc, int offloc)
193: {
194: struct mii_softc *child, *nchild;
195:
196: if (phyloc != MII_PHY_ANY && offloc != MII_PHY_ANY)
197: panic("mii_detach: phyloc and offloc specified");
198:
199: if ((mii->mii_flags & MIIF_INITDONE) == 0)
200: return;
201:
202: for (child = LIST_FIRST(&mii->mii_phys);
203: child != NULL; child = nchild) {
204: nchild = LIST_NEXT(child, mii_list);
205: if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) {
206: if (phyloc != MII_PHY_ANY &&
207: phyloc != child->mii_phy)
208: continue;
209: if (offloc != MII_OFFSET_ANY &&
210: offloc != child->mii_offset)
211: continue;
212: }
213: LIST_REMOVE(child, mii_list);
214: (void) config_detach(&child->mii_dev, DETACH_FORCE);
215: }
216: }
217:
218: int
219: mii_print(void *aux, const char *pnp)
220: {
221: struct mii_attach_args *ma = aux;
222:
223: if (pnp != NULL)
224: printf("OUI 0x%06x model 0x%04x rev %d at %s",
225: MII_OUI(ma->mii_id1, ma->mii_id2), MII_MODEL(ma->mii_id2),
226: MII_REV(ma->mii_id2), pnp);
227:
228: printf(" phy %d", ma->mii_phyno);
229: return (UNCONF);
230: }
231:
232: int
233: mii_submatch(struct device *parent, void *match, void *aux)
234: {
235: struct cfdata *cf = match;
236: struct mii_attach_args *ma = aux;
237:
238: if (ma->mii_phyno != cf->cf_loc[MIICF_PHY] &&
239: cf->cf_loc[MIICF_PHY] != MIICF_PHY_DEFAULT)
240: return (0);
241:
242: return ((*cf->cf_attach->ca_match)(parent, cf, aux));
243: }
244:
245: /*
246: * Media changed; notify all PHYs.
247: */
248: int
249: mii_mediachg(struct mii_data *mii)
250: {
251: struct mii_softc *child;
252: int rv;
253:
254: mii->mii_media_status = 0;
255: mii->mii_media_active = IFM_NONE;
256:
257: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
258: child = LIST_NEXT(child, mii_list)) {
259: rv = PHY_SERVICE(child, mii, MII_MEDIACHG);
260: if (rv)
261: return (rv);
262: }
263: return (0);
264: }
265:
266: /*
267: * Call the PHY tick routines, used during autonegotiation.
268: */
269: void
270: mii_tick(struct mii_data *mii)
271: {
272: struct mii_softc *child;
273:
274: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
275: child = LIST_NEXT(child, mii_list))
276: (void) PHY_SERVICE(child, mii, MII_TICK);
277: }
278:
279: /*
280: * Get media status from PHYs.
281: */
282: void
283: mii_pollstat(struct mii_data *mii)
284: {
285: struct mii_softc *child;
286:
287: mii->mii_media_status = 0;
288: mii->mii_media_active = IFM_NONE;
289:
290: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
291: child = LIST_NEXT(child, mii_list))
292: (void) PHY_SERVICE(child, mii, MII_POLLSTAT);
293: }
294:
295: /*
296: * Inform the PHYs that the interface is down.
297: */
298: void
299: mii_down(struct mii_data *mii)
300: {
301: struct mii_softc *child;
302:
303: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
304: child = LIST_NEXT(child, mii_list))
305: (void) PHY_SERVICE(child, mii, MII_DOWN);
306: }
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