xref: /freebsd/sys/dev/mii/axphy.c (revision e17f5b1d)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2009 M. Warner Losh <imp@FreeBSD.org>
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 unmodified, this list of conditions, and the following
11  *    disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30 
31 /*
32  * driver for internal phy in the AX88x9x chips.
33  */
34 
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/socket.h>
40 #include <sys/bus.h>
41 
42 #include <net/if.h>
43 #include <net/if_media.h>
44 
45 #include <dev/mii/mii.h>
46 #include <dev/mii/miivar.h>
47 #include "miidevs.h"
48 
49 #include "miibus_if.h"
50 
51 static int 	axphy_probe(device_t dev);
52 static int 	axphy_attach(device_t dev);
53 
54 static device_method_t axphy_methods[] = {
55 	/* device interface */
56 	DEVMETHOD(device_probe,		axphy_probe),
57 	DEVMETHOD(device_attach,	axphy_attach),
58 	DEVMETHOD(device_detach,	mii_phy_detach),
59 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
60 	DEVMETHOD_END
61 };
62 
63 static devclass_t axphy_devclass;
64 
65 static driver_t axphy_driver = {
66 	"axphy",
67 	axphy_methods,
68 	sizeof(struct mii_softc)
69 };
70 
71 DRIVER_MODULE(axphy, miibus, axphy_driver, axphy_devclass, 0, 0);
72 
73 static int	axphy_service(struct mii_softc *, struct mii_data *, int);
74 static void	axphy_status(struct mii_softc *);
75 
76 static const struct mii_phydesc axphys[] = {
77 	MII_PHY_DESC(xxASIX, AX88X9X),
78 	MII_PHY_END
79 };
80 
81 static const struct mii_phy_funcs axphy_funcs = {
82 	axphy_service,
83 	axphy_status,
84 	mii_phy_reset
85 };
86 
87 static int
88 axphy_probe(device_t dev)
89 {
90 
91 	return (mii_phy_dev_probe(dev, axphys, BUS_PROBE_DEFAULT));
92 }
93 
94 static int
95 axphy_attach(device_t dev)
96 {
97 	struct mii_softc *sc;
98 
99 	sc = device_get_softc(dev);
100 
101 	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
102 	    &axphy_funcs, 1);
103 	mii_phy_setmedia(sc);
104 
105 	return (0);
106 }
107 
108 static int
109 axphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
110 {
111 
112 	switch (cmd) {
113 	case MII_POLLSTAT:
114 		break;
115 
116 	case MII_MEDIACHG:
117 		mii_phy_setmedia(sc);
118 		break;
119 
120 	case MII_TICK:
121 		if (mii_phy_tick(sc) == EJUSTRETURN)
122 			return (0);
123 		break;
124 	}
125 
126 	/* Update the media status. */
127 	PHY_STATUS(sc);
128 
129 	/* Callback if something changed. */
130 	mii_phy_update(sc, cmd);
131 	return (0);
132 }
133 
134 static void
135 axphy_status(struct mii_softc *sc)
136 {
137 	struct mii_data *mii = sc->mii_pdata;
138 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
139 	int bmsr, bmcr;
140 
141 	mii->mii_media_status = IFM_AVALID;
142 	mii->mii_media_active = IFM_ETHER;
143 
144 	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
145 	if (bmsr & BMSR_LINK)
146 		mii->mii_media_status |= IFM_ACTIVE;
147 
148 	bmcr = PHY_READ(sc, MII_BMCR);
149 	if (bmcr & BMCR_ISO) {
150 		mii->mii_media_active |= IFM_NONE;
151 		mii->mii_media_status = 0;
152 		return;
153 	}
154 
155 	if (bmcr & BMCR_LOOP)
156 		mii->mii_media_active |= IFM_LOOP;
157 
158 	if (bmcr & BMCR_AUTOEN) {
159 		if ((bmsr & BMSR_ACOMP) == 0) {
160 			mii->mii_media_active |= IFM_NONE;
161 			return;
162 		}
163 
164 #if 0
165 		scr = PHY_READ(sc, MII_AXPHY_SCR);
166 		if (scr & SCR_S100)
167 			mii->mii_media_active |= IFM_100_TX;
168 		else
169 			mii->mii_media_active |= IFM_10_T;
170 		if (scr & SCR_FDX)
171 			mii->mii_media_active |=
172 			    IFM_FDX | mii_phy_flowstatus(sc);
173 		else
174 			mii->mii_media_active |= IFM_HDX;
175 #endif
176 	} else
177 		mii->mii_media_active = ife->ifm_media;
178 }
179