xref: /freebsd/sys/dev/mii/axphy.c (revision a3cf0ef5a295c885c895fabfd56470c0d1db322d)
1 /*-
2  * Copyright (c) 2009, M. Warner Losh
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice unmodified, this list of conditions, and the following
10  *    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  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 /*
31  * driver for internal phy in the AX88x9x chips.
32  */
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/socket.h>
39 #include <sys/bus.h>
40 
41 #include <net/if.h>
42 #include <net/if_media.h>
43 
44 #include <dev/mii/mii.h>
45 #include <dev/mii/miivar.h>
46 #include "miidevs.h"
47 
48 #include "miibus_if.h"
49 
50 static int 	axphy_probe(device_t dev);
51 static int 	axphy_attach(device_t dev);
52 
53 static device_method_t axphy_methods[] = {
54 	/* device interface */
55 	DEVMETHOD(device_probe,		axphy_probe),
56 	DEVMETHOD(device_attach,	axphy_attach),
57 	DEVMETHOD(device_detach,	mii_phy_detach),
58 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
59 	{ 0, 0 }
60 };
61 
62 static devclass_t axphy_devclass;
63 
64 static driver_t axphy_driver = {
65 	"axphy",
66 	axphy_methods,
67 	sizeof(struct mii_softc)
68 };
69 
70 DRIVER_MODULE(axphy, miibus, axphy_driver, axphy_devclass, 0, 0);
71 
72 static int	axphy_service(struct mii_softc *, struct mii_data *, int);
73 static void	axphy_status(struct mii_softc *);
74 
75 static const struct mii_phydesc axphys[] = {
76 	MII_PHY_DESC(ASIX, AX88X9X),
77 	MII_PHY_END
78 };
79 
80 static int
81 axphy_probe(device_t dev)
82 {
83 
84 	return (mii_phy_dev_probe(dev, axphys, BUS_PROBE_DEFAULT));
85 }
86 
87 static int
88 axphy_attach(device_t dev)
89 {
90 	struct mii_softc *sc;
91 	struct mii_attach_args *ma;
92 	struct mii_data *mii;
93 
94 	sc = device_get_softc(dev);
95 	ma = device_get_ivars(dev);
96 	sc->mii_dev = device_get_parent(dev);
97 	mii = ma->mii_data;
98 	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
99 
100 	sc->mii_flags = miibus_get_flags(dev);
101 	sc->mii_inst = mii->mii_instance++;
102 	sc->mii_phy = ma->mii_phyno;
103 	sc->mii_service = axphy_service;
104 	sc->mii_pdata = mii;
105 
106 	sc->mii_flags |= MIIF_NOISOLATE;
107 
108 	mii_phy_reset(sc);
109 
110 	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
111 	device_printf(dev, " ");
112 	mii_phy_add_media(sc);
113 	printf("\n");
114 
115 	MIIBUS_MEDIAINIT(sc->mii_dev);
116 	mii_phy_setmedia(sc);
117 
118 	return (0);
119 }
120 
121 static int
122 axphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
123 {
124 
125 	switch (cmd) {
126 	case MII_POLLSTAT:
127 		break;
128 
129 	case MII_MEDIACHG:
130 		/*
131 		 * If the interface is not up, don't do anything.
132 		 */
133 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
134 			break;
135 
136 		mii_phy_setmedia(sc);
137 		break;
138 
139 	case MII_TICK:
140 		if (mii_phy_tick(sc) == EJUSTRETURN)
141 			return (0);
142 		break;
143 	}
144 
145 	/* Update the media status. */
146 	axphy_status(sc);
147 
148 	/* Callback if something changed. */
149 	mii_phy_update(sc, cmd);
150 	return (0);
151 }
152 
153 static void
154 axphy_status(struct mii_softc *sc)
155 {
156 	struct mii_data *mii = sc->mii_pdata;
157 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
158 	int bmsr, bmcr;
159 
160 	mii->mii_media_status = IFM_AVALID;
161 	mii->mii_media_active = IFM_ETHER;
162 
163 	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
164 	if (bmsr & BMSR_LINK)
165 		mii->mii_media_status |= IFM_ACTIVE;
166 
167 	bmcr = PHY_READ(sc, MII_BMCR);
168 	if (bmcr & BMCR_ISO) {
169 		mii->mii_media_active |= IFM_NONE;
170 		mii->mii_media_status = 0;
171 		return;
172 	}
173 
174 	if (bmcr & BMCR_LOOP)
175 		mii->mii_media_active |= IFM_LOOP;
176 
177 	if (bmcr & BMCR_AUTOEN) {
178 		if ((bmsr & BMSR_ACOMP) == 0) {
179 			mii->mii_media_active |= IFM_NONE;
180 			return;
181 		}
182 
183 #if 0
184 		scr = PHY_READ(sc, MII_AXPHY_SCR);
185 		if (scr & SCR_S100)
186 			mii->mii_media_active |= IFM_100_TX;
187 		else
188 			mii->mii_media_active |= IFM_10_T;
189 		if (scr & SCR_FDX)
190 			mii->mii_media_active |= IFM_FDX;
191 		else
192 			mii->mii_media_active |= IFM_HDX;
193 #endif
194 	} else
195 		mii->mii_media_active = ife->ifm_media;
196 }
197