xref: /freebsd/sys/dev/mii/gentbi.c (revision 7431dfd4580e850375fe5478d92ec770344db098)
1 /*	$NetBSD: gentbi.c,v 1.15 2006/03/29 07:05:24 thorpej Exp $	*/
2 
3 /*-
4  * Copyright (c) 1998, 1999, 2000, 2001 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  *
20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 /*
34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  *
45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55  */
56 
57 /*
58  * Driver for generic ten-bit (1000BASE-SX) interfaces, built into
59  * many Gigabit Ethernet chips.
60  *
61  * All we have to do here is correctly report speed and duplex.
62  */
63 
64 #include <sys/cdefs.h>
65 __FBSDID("$FreeBSD$");
66 
67 /*
68  * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
69  * fiber interfaces).
70  */
71 
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/kernel.h>
75 #include <sys/module.h>
76 #include <sys/socket.h>
77 #include <sys/errno.h>
78 #include <sys/bus.h>
79 
80 #include <net/if.h>
81 #include <net/if_media.h>
82 
83 #include <dev/mii/mii.h>
84 #include <dev/mii/miivar.h>
85 #include "miidevs.h"
86 
87 #include "miibus_if.h"
88 
89 static int	gentbi_probe(device_t);
90 static int	gentbi_attach(device_t);
91 
92 static device_method_t gentbi_methods[] = {
93 	/* device interface */
94 	DEVMETHOD(device_probe,		gentbi_probe),
95 	DEVMETHOD(device_attach,	gentbi_attach),
96 	DEVMETHOD(device_detach,	mii_phy_detach),
97 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
98 	DEVMETHOD_END
99 };
100 
101 static devclass_t gentbi_devclass;
102 
103 static driver_t gentbi_driver = {
104 	"gentbi",
105 	gentbi_methods,
106 	sizeof(struct mii_softc)
107 };
108 
109 DRIVER_MODULE(gentbi, miibus, gentbi_driver, gentbi_devclass, 0, 0);
110 
111 static int	gentbi_service(struct mii_softc *, struct mii_data *, int);
112 static void	gentbi_status(struct mii_softc *);
113 
114 static const struct mii_phy_funcs gentbi_funcs = {
115 	gentbi_service,
116 	gentbi_status,
117 	mii_phy_reset
118 };
119 
120 static int
121 gentbi_probe(device_t dev)
122 {
123 	device_t parent;
124 	struct mii_attach_args *ma;
125 	int bmsr, extsr;
126 
127 	parent = device_get_parent(dev);
128 	ma = device_get_ivars(dev);
129 
130 	/*
131 	 * We match as a generic TBI if:
132 	 *
133 	 *	- There is no media in the BMSR.
134 	 *	- EXTSR has only 1000X.
135 	 */
136 	bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
137 	if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
138 		return (ENXIO);
139 
140 	extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
141 	if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
142 		return (ENXIO);
143 
144 	if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
145 		/*
146 		 * We think this is a generic TBI.  Return a match
147 		 * priority higher than ukphy, but lower than what
148 		 * specific drivers will return.
149 		 */
150 		device_set_desc(dev, "Generic ten-bit interface");
151 		return (BUS_PROBE_LOW_PRIORITY);
152 	}
153 
154 	return (ENXIO);
155 }
156 
157 static int
158 gentbi_attach(device_t dev)
159 {
160 	struct mii_softc *sc;
161 
162 	sc = device_get_softc(dev);
163 
164 	mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &gentbi_funcs, 0);
165 
166 	PHY_RESET(sc);
167 
168 	/*
169 	 * Mask out all media in the BMSR.  We only are really interested
170 	 * in "auto".
171 	 */
172 	sc->mii_capabilities =
173 	    PHY_READ(sc, MII_BMSR) & sc->mii_capmask & ~BMSR_MEDIAMASK;
174 	if (sc->mii_capabilities & BMSR_EXTSTAT)
175 		sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
176 
177 	device_printf(dev, " ");
178 	mii_phy_add_media(sc);
179 	printf("\n");
180 
181 	MIIBUS_MEDIAINIT(sc->mii_dev);
182 	return (0);
183 }
184 
185 static int
186 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
187 {
188 
189 	switch (cmd) {
190 	case MII_POLLSTAT:
191 		break;
192 
193 	case MII_MEDIACHG:
194 		mii_phy_setmedia(sc);
195 		break;
196 
197 	case MII_TICK:
198 		if (mii_phy_tick(sc) == EJUSTRETURN)
199 			return (0);
200 		break;
201 	}
202 
203 	/* Update the media status. */
204 	PHY_STATUS(sc);
205 
206 	/* Callback if something changed. */
207 	mii_phy_update(sc, cmd);
208 	return (0);
209 }
210 
211 static void
212 gentbi_status(struct mii_softc *sc)
213 {
214 	struct mii_data *mii = sc->mii_pdata;
215 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
216 	int bmsr, bmcr, anlpar;
217 
218 	mii->mii_media_status = IFM_AVALID;
219 	mii->mii_media_active = IFM_ETHER;
220 
221 	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
222 
223 	if (bmsr & BMSR_LINK)
224 		mii->mii_media_status |= IFM_ACTIVE;
225 
226 	bmcr = PHY_READ(sc, MII_BMCR);
227 	if (bmcr & BMCR_ISO) {
228 		mii->mii_media_active |= IFM_NONE;
229 		mii->mii_media_status = 0;
230 		return;
231 	}
232 
233 	if (bmcr & BMCR_LOOP)
234 		mii->mii_media_active |= IFM_LOOP;
235 
236 	if (bmcr & BMCR_AUTOEN) {
237 		/*
238 		 * The media status bits are only valid if autonegotiation
239 		 * has completed (or it's disabled).
240 		 */
241 		if ((bmsr & BMSR_ACOMP) == 0) {
242 			/* Erg, still trying, I guess... */
243 			mii->mii_media_active |= IFM_NONE;
244 			return;
245 		}
246 
247 		/*
248 		 * The media is always 1000baseSX.  Check the ANLPAR to
249 		 * see if we're doing full-duplex.
250 		 */
251 		mii->mii_media_active |= IFM_1000_SX;
252 		anlpar = PHY_READ(sc, MII_ANLPAR);
253 		if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
254 		    (anlpar & ANLPAR_X_FD) != 0)
255 			mii->mii_media_active |=
256 			    IFM_FDX | mii_phy_flowstatus(sc);
257 		else
258 			mii->mii_media_active |= IFM_HDX;
259 	} else
260 		mii->mii_media_active = ife->ifm_media;
261 }
262