xref: /freebsd/sys/dev/mii/pnaphy.c (revision 74bf4e164ba5851606a27d4feff27717452583e5)
1 /*
2  * Copyright (c) 2000 Berkeley Software Design, Inc.
3  * Copyright (c) 1997, 1998, 1999, 2000
4  *	Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by Bill Paul.
17  * 4. Neither the name of the author nor the names of any co-contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31  * THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36 
37 /*
38  * driver for homePNA PHYs
39  * This is really just a stub that allows us to identify homePNA-based
40  * transceicers and display the link status. MII-based homePNA PHYs
41  * only support one media type and no autonegotiation. If we were
42  * really clever, we could tweak some of the vendor-specific registers
43  * to optimize the link.
44  */
45 
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/socket.h>
50 #include <sys/errno.h>
51 #include <sys/module.h>
52 #include <sys/bus.h>
53 
54 #include <net/if.h>
55 #include <net/if_media.h>
56 
57 
58 #include <dev/mii/mii.h>
59 #include <dev/mii/miivar.h>
60 #include "miidevs.h"
61 
62 #include "miibus_if.h"
63 
64 static int pnaphy_probe(device_t);
65 static int pnaphy_attach(device_t);
66 
67 static device_method_t pnaphy_methods[] = {
68 	/* device interface */
69 	DEVMETHOD(device_probe,		pnaphy_probe),
70 	DEVMETHOD(device_attach,	pnaphy_attach),
71 	DEVMETHOD(device_detach,	mii_phy_detach),
72 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
73 	{ 0, 0 }
74 };
75 
76 static devclass_t pnaphy_devclass;
77 
78 static driver_t pnaphy_driver = {
79 	"pnaphy",
80 	pnaphy_methods,
81 	sizeof(struct mii_softc)
82 };
83 
84 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
85 
86 static int	pnaphy_service(struct mii_softc *, struct mii_data *,int);
87 
88 static int
89 pnaphy_probe(dev)
90 	device_t		dev;
91 {
92 
93 	struct mii_attach_args	*ma;
94 
95 	ma = device_get_ivars(dev);
96 
97 	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_AMD &&
98 	    MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) {
99 		device_set_desc(dev, MII_STR_AMD_79c978);
100 		return(0);
101 	}
102 
103 	return(ENXIO);
104 }
105 
106 static int
107 pnaphy_attach(dev)
108 	device_t		dev;
109 {
110 	struct mii_softc *sc;
111 	struct mii_attach_args *ma;
112 	struct mii_data *mii;
113 	const char *sep = "";
114 
115 	sc = device_get_softc(dev);
116 	ma = device_get_ivars(dev);
117 	sc->mii_dev = device_get_parent(dev);
118 	mii = device_get_softc(sc->mii_dev);
119 	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
120 
121 	sc->mii_inst = mii->mii_instance;
122 	sc->mii_phy = ma->mii_phyno;
123 	sc->mii_service = pnaphy_service;
124 	sc->mii_pdata = mii;
125 
126 	mii->mii_instance++;
127 
128 	sc->mii_flags |= MIIF_NOISOLATE;
129 
130 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
131 #define PRINT(s)	printf("%s%s", sep, s); sep = ", "
132 
133 	mii_phy_reset(sc);
134 
135 	sc->mii_capabilities =
136 	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
137 	device_printf(dev, " ");
138 	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
139 		printf("no media present");
140 	else {
141 		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, sc->mii_inst), 0);
142 		PRINT("HomePNA");
143 	}
144 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
145 	    BMCR_ISO);
146 
147 	printf("\n");
148 
149 #undef ADD
150 #undef PRINT
151 
152 	MIIBUS_MEDIAINIT(sc->mii_dev);
153 
154 	return(0);
155 }
156 
157 static int
158 pnaphy_service(sc, mii, cmd)
159 	struct mii_softc *sc;
160 	struct mii_data *mii;
161 	int cmd;
162 {
163 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
164 	int reg;
165 
166 	switch (cmd) {
167 	case MII_POLLSTAT:
168 		/*
169 		 * If we're not polling our PHY instance, just return.
170 		 */
171 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
172 			return (0);
173 		break;
174 
175 	case MII_MEDIACHG:
176 		/*
177 		 * If the media indicates a different PHY instance,
178 		 * isolate ourselves.
179 		 */
180 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
181 			reg = PHY_READ(sc, MII_BMCR);
182 			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
183 			return (0);
184 		}
185 
186 		/*
187 		 * If the interface is not up, don't do anything.
188 		 */
189 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
190 			break;
191 
192 		switch (IFM_SUBTYPE(ife->ifm_media)) {
193 		case IFM_AUTO:
194 		case IFM_10_T:
195 		case IFM_100_TX:
196 		case IFM_100_T4:
197 			return (EINVAL);
198 		default:
199 			/*
200 			 * BMCR data is stored in the ifmedia entry.
201 			 */
202 			PHY_WRITE(sc, MII_ANAR,
203 			    mii_anar(ife->ifm_media));
204 			PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
205 		}
206 		break;
207 
208 	case MII_TICK:
209 		/*
210 		 * If we're not currently selected, just return.
211 		 */
212 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
213 			return (0);
214 		if (mii_phy_tick(sc) == EJUSTRETURN)
215 			return (0);
216 		break;
217 	}
218 
219 	/* Update the media status. */
220 	ukphy_status(sc);
221 	if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
222 		mii->mii_media_active = IFM_ETHER|IFM_HPNA_1;
223 
224 	/* Callback if something changed. */
225 	mii_phy_update(sc, cmd);
226 	return (0);
227 }
228