axphy.c revision 213385 
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: head/sys/dev/mii/axphy.c 213385 2010-10-03 17:05:25Z marius $");
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
50static int 	axphy_probe(device_t dev);
51static int 	axphy_attach(device_t dev);
52
53static 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
62static devclass_t axphy_devclass;
63
64static driver_t axphy_driver = {
65	"axphy",
66	axphy_methods,
67	sizeof(struct mii_softc)
68};
69
70DRIVER_MODULE(axphy, miibus, axphy_driver, axphy_devclass, 0, 0);
71
72static int	axphy_service(struct mii_softc *, struct mii_data *, int);
73static void	axphy_status(struct mii_softc *);
74
75static const struct mii_phydesc axphys[] = {
76	MII_PHY_DESC(ASIX, AX88X9X),
77	MII_PHY_END
78};
79
80static int
81axphy_probe(device_t dev)
82{
83
84	return (mii_phy_dev_probe(dev, axphys, BUS_PROBE_DEFAULT));
85}
86
87static int
88axphy_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_inst = mii->mii_instance++;
101	sc->mii_phy = ma->mii_phyno;
102	sc->mii_service = axphy_service;
103	sc->mii_pdata = mii;
104
105	sc->mii_flags |= MIIF_NOISOLATE;
106
107	mii_phy_reset(sc);
108
109	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
110	device_printf(dev, " ");
111	mii_phy_add_media(sc);
112	printf("\n");
113
114	MIIBUS_MEDIAINIT(sc->mii_dev);
115	mii_phy_setmedia(sc);
116
117	return (0);
118}
119
120static int
121axphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
122{
123
124	switch (cmd) {
125	case MII_POLLSTAT:
126		break;
127
128	case MII_MEDIACHG:
129		/*
130		 * If the interface is not up, don't do anything.
131		 */
132		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
133			break;
134
135		mii_phy_setmedia(sc);
136		break;
137
138	case MII_TICK:
139		if (mii_phy_tick(sc) == EJUSTRETURN)
140			return (0);
141		break;
142	}
143
144	/* Update the media status. */
145	axphy_status(sc);
146
147	/* Callback if something changed. */
148	mii_phy_update(sc, cmd);
149	return (0);
150}
151
152static void
153axphy_status(struct mii_softc *sc)
154{
155	struct mii_data *mii = sc->mii_pdata;
156	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
157	int bmsr, bmcr;
158
159	mii->mii_media_status = IFM_AVALID;
160	mii->mii_media_active = IFM_ETHER;
161
162	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
163	if (bmsr & BMSR_LINK)
164		mii->mii_media_status |= IFM_ACTIVE;
165
166	bmcr = PHY_READ(sc, MII_BMCR);
167	if (bmcr & BMCR_ISO) {
168		mii->mii_media_active |= IFM_NONE;
169		mii->mii_media_status = 0;
170		return;
171	}
172
173	if (bmcr & BMCR_LOOP)
174		mii->mii_media_active |= IFM_LOOP;
175
176	if (bmcr & BMCR_AUTOEN) {
177		if ((bmsr & BMSR_ACOMP) == 0) {
178			mii->mii_media_active |= IFM_NONE;
179			return;
180		}
181
182#if 0
183		scr = PHY_READ(sc, MII_AXPHY_SCR);
184		if (scr & SCR_S100)
185			mii->mii_media_active |= IFM_100_TX;
186		else
187			mii->mii_media_active |= IFM_10_T;
188		if (scr & SCR_FDX)
189			mii->mii_media_active |= IFM_FDX;
190		else
191			mii->mii_media_active |= IFM_HDX;
192#endif
193	} else
194		mii->mii_media_active = ife->ifm_media;
195}
196