mii_physubr.c revision 67164 
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 67164 2000-10-15 14:19:01Z phk $";
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		timeout(mii_phy_auto_timeout, mii, hz >> 1);
110	}
111	return (EJUSTRETURN);
112}
113
114void
115mii_phy_auto_timeout(arg)
116	void *arg;
117{
118	struct mii_softc *mii = arg;
119	int s, bmsr;
120
121	s = splnet();
122	mii->mii_flags &= ~MIIF_DOINGAUTO;
123	bmsr = PHY_READ(mii, MII_BMSR);
124#if 0
125	if ((bmsr & BMSR_ACOMP) == 0)
126		printf("%s: autonegotiation failed to complete\n",
127		    sc->sc_dev.dv_xname);
128#endif
129
130	/* Update the media status. */
131	(void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT);
132	splx(s);
133}
134
135void
136mii_phy_reset(mii)
137	struct mii_softc *mii;
138{
139	int reg, i;
140
141	if (mii->mii_flags & MIIF_NOISOLATE)
142		reg = BMCR_RESET;
143	else
144		reg = BMCR_RESET | BMCR_ISO;
145	PHY_WRITE(mii, MII_BMCR, reg);
146
147	/* Wait 100ms for it to complete. */
148	for (i = 0; i < 100; i++) {
149		reg = PHY_READ(mii, MII_BMCR);
150		if ((reg & BMCR_RESET) == 0)
151			break;
152		DELAY(1000);
153	}
154
155	if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0))
156		PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO);
157}
158
159/*
160 * Given an ifmedia word, return the corresponding ANAR value.
161 */
162int
163mii_anar(media)
164	int media;
165{
166	int rv;
167
168	switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
169	case IFM_ETHER|IFM_10_T:
170		rv = ANAR_10|ANAR_CSMA;
171		break;
172	case IFM_ETHER|IFM_10_T|IFM_FDX:
173		rv = ANAR_10_FD|ANAR_CSMA;
174		break;
175	case IFM_ETHER|IFM_100_TX:
176		rv = ANAR_TX|ANAR_CSMA;
177		break;
178	case IFM_ETHER|IFM_100_TX|IFM_FDX:
179		rv = ANAR_TX_FD|ANAR_CSMA;
180		break;
181	case IFM_ETHER|IFM_100_T4:
182		rv = ANAR_T4|ANAR_CSMA;
183		break;
184	default:
185		rv = 0;
186		break;
187	}
188
189	return (rv);
190}
191
192/*
193 * Given a BMCR value, return the corresponding ifmedia word.
194 */
195int
196mii_media_from_bmcr(bmcr)
197	int bmcr;
198{
199	int rv = IFM_ETHER;
200
201	if (bmcr & BMCR_S100)
202		rv |= IFM_100_TX;
203	else
204		rv |= IFM_10_T;
205	if (bmcr & BMCR_FDX)
206		rv |= IFM_FDX;
207
208	return (rv);
209}
210
211/*
212 * Initialize generic PHY media based on BMSR, called when a PHY is
213 * attached.  We expect to be set up to print a comma-separated list
214 * of media names.  Does not print a newline.
215 */
216void
217mii_add_media(mii, bmsr, instance)
218	struct mii_data *mii;
219	int bmsr, instance;
220{
221	const char *sep = "";
222
223#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
224#define	PRINT(s)	printf("%s%s", sep, s); sep = ", "
225
226	if (bmsr & BMSR_10THDX) {
227		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0);
228		PRINT("10baseT");
229	}
230	if (bmsr & BMSR_10TFDX) {
231		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance),
232		    BMCR_FDX);
233		PRINT("10baseT-FDX");
234	}
235	if (bmsr & BMSR_100TXHDX) {
236		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance),
237		    BMCR_S100);
238		PRINT("100baseTX");
239	}
240	if (bmsr & BMSR_100TXFDX) {
241		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance),
242		    BMCR_S100|BMCR_FDX);
243		PRINT("100baseTX-FDX");
244	}
245	if (bmsr & BMSR_100T4) {
246		/*
247		 * XXX How do you enable 100baseT4?  I assume we set
248		 * XXX BMCR_S100 and then assume the PHYs will take
249		 * XXX watever action is necessary to switch themselves
250		 * XXX into T4 mode.
251		 */
252		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance),
253		    BMCR_S100);
254		PRINT("100baseT4");
255	}
256	if (bmsr & BMSR_ANEG) {
257		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance),
258		    BMCR_AUTOEN);
259		PRINT("auto");
260	}
261#undef ADD
262#undef PRINT
263}
264