mii_physubr.c revision 69925 
1/*	$NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $	*/
2
3/*-
4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the NetBSD
22 *	Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40/*
41 * Subroutines common to all PHYs.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/kernel.h>
47#include <sys/socket.h>
48#include <sys/errno.h>
49#include <sys/module.h>
50#include <sys/bus.h>
51
52
53#include <net/if.h>
54#include <net/if_media.h>
55
56#include <dev/mii/mii.h>
57#include <dev/mii/miivar.h>
58
59#include "miibus_if.h"
60
61#if !defined(lint)
62static const char rcsid[] =
63  "$FreeBSD: head/sys/dev/mii/mii_physubr.c 69925 2000-12-12 19:31:14Z wpaul $";
64#endif
65
66void	mii_phy_auto_timeout __P((void *));
67
68int
69mii_phy_auto(mii, waitfor)
70	struct mii_softc *mii;
71	int waitfor;
72{
73	int bmsr, i;
74
75	if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
76		PHY_WRITE(mii, MII_ANAR,
77		    BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA);
78		PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
79	}
80
81	if (waitfor) {
82		/* Wait 500ms for it to complete. */
83		for (i = 0; i < 500; i++) {
84			if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP)
85				return (0);
86			DELAY(1000);
87#if 0
88		if ((bmsr & BMSR_ACOMP) == 0)
89			printf("%s: autonegotiation failed to complete\n",
90			    mii->mii_dev.dv_xname);
91#endif
92		}
93
94		/*
95		 * Don't need to worry about clearing MIIF_DOINGAUTO.
96		 * If that's set, a timeout is pending, and it will
97		 * clear the flag.
98		 */
99		return (EIO);
100	}
101
102	/*
103	 * Just let it finish asynchronously.  This is for the benefit of
104	 * the tick handler driving autonegotiation.  Don't want 500ms
105	 * delays all the time while the system is running!
106	 */
107	if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
108		mii->mii_flags |= MIIF_DOINGAUTO;
109		mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1);
110	}
111	return (EJUSTRETURN);
112}
113
114void
115mii_phy_auto_stop(sc)
116	struct mii_softc *sc;
117{
118	if (sc->mii_flags & MIIF_DOINGAUTO) {
119		sc->mii_flags &= ~MIIF_DOINGAUTO;
120		untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch);
121	}
122}
123
124void
125mii_phy_auto_timeout(arg)
126	void *arg;
127{
128	struct mii_softc *mii = arg;
129	int s, bmsr;
130
131	s = splnet();
132	mii->mii_flags &= ~MIIF_DOINGAUTO;
133	bmsr = PHY_READ(mii, MII_BMSR);
134#if 0
135	if ((bmsr & BMSR_ACOMP) == 0)
136		printf("%s: autonegotiation failed to complete\n",
137		    sc->sc_dev.dv_xname);
138#endif
139
140	/* Update the media status. */
141	(void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT);
142	splx(s);
143}
144
145void
146mii_phy_reset(mii)
147	struct mii_softc *mii;
148{
149	int reg, i;
150
151	if (mii->mii_flags & MIIF_NOISOLATE)
152		reg = BMCR_RESET;
153	else
154		reg = BMCR_RESET | BMCR_ISO;
155	PHY_WRITE(mii, MII_BMCR, reg);
156
157	/* Wait 100ms for it to complete. */
158	for (i = 0; i < 100; i++) {
159		reg = PHY_READ(mii, MII_BMCR);
160		if ((reg & BMCR_RESET) == 0)
161			break;
162		DELAY(1000);
163	}
164
165	if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0))
166		PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO);
167}
168
169/*
170 * Given an ifmedia word, return the corresponding ANAR value.
171 */
172int
173mii_anar(media)
174	int media;
175{
176	int rv;
177
178	switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
179	case IFM_ETHER|IFM_10_T:
180		rv = ANAR_10|ANAR_CSMA;
181		break;
182	case IFM_ETHER|IFM_10_T|IFM_FDX:
183		rv = ANAR_10_FD|ANAR_CSMA;
184		break;
185	case IFM_ETHER|IFM_100_TX:
186		rv = ANAR_TX|ANAR_CSMA;
187		break;
188	case IFM_ETHER|IFM_100_TX|IFM_FDX:
189		rv = ANAR_TX_FD|ANAR_CSMA;
190		break;
191	case IFM_ETHER|IFM_100_T4:
192		rv = ANAR_T4|ANAR_CSMA;
193		break;
194	default:
195		rv = 0;
196		break;
197	}
198
199	return (rv);
200}
201
202/*
203 * Given a BMCR value, return the corresponding ifmedia word.
204 */
205int
206mii_media_from_bmcr(bmcr)
207	int bmcr;
208{
209	int rv = IFM_ETHER;
210
211	if (bmcr & BMCR_S100)
212		rv |= IFM_100_TX;
213	else
214		rv |= IFM_10_T;
215	if (bmcr & BMCR_FDX)
216		rv |= IFM_FDX;
217
218	return (rv);
219}
220
221/*
222 * Initialize generic PHY media based on BMSR, called when a PHY is
223 * attached.  We expect to be set up to print a comma-separated list
224 * of media names.  Does not print a newline.
225 */
226void
227mii_add_media(mii, bmsr, instance)
228	struct mii_data *mii;
229	int bmsr, instance;
230{
231	const char *sep = "";
232
233#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
234#define	PRINT(s)	printf("%s%s", sep, s); sep = ", "
235
236	if (bmsr & BMSR_10THDX) {
237		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0);
238		PRINT("10baseT");
239	}
240	if (bmsr & BMSR_10TFDX) {
241		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance),
242		    BMCR_FDX);
243		PRINT("10baseT-FDX");
244	}
245	if (bmsr & BMSR_100TXHDX) {
246		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance),
247		    BMCR_S100);
248		PRINT("100baseTX");
249	}
250	if (bmsr & BMSR_100TXFDX) {
251		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance),
252		    BMCR_S100|BMCR_FDX);
253		PRINT("100baseTX-FDX");
254	}
255	if (bmsr & BMSR_100T4) {
256		/*
257		 * XXX How do you enable 100baseT4?  I assume we set
258		 * XXX BMCR_S100 and then assume the PHYs will take
259		 * XXX watever action is necessary to switch themselves
260		 * XXX into T4 mode.
261		 */
262		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance),
263		    BMCR_S100);
264		PRINT("100baseT4");
265	}
266	if (bmsr & BMSR_ANEG) {
267		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance),
268		    BMCR_AUTOEN);
269		PRINT("auto");
270	}
271#undef ADD
272#undef PRINT
273}
274