1/*-
2 * Copyright (c) 2006 Benno Rice.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD$");
27
28/*
29 * Driver for the SEEQ 80220 and 84220.
30 * (Originally developed for the internal PHY on the SMSC LAN91C111.)
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/socket.h>
37#include <sys/errno.h>
38#include <sys/module.h>
39#include <sys/bus.h>
40#include <sys/malloc.h>
41
42#include <machine/bus.h>
43
44#include <net/if.h>
45#include <net/if_media.h>
46
47#include <dev/mii/mii.h>
48#include <dev/mii/miivar.h>
49#include "miidevs.h"
50
51#include "miibus_if.h"
52
53static int	smcphy_probe(device_t);
54static int	smcphy_attach(device_t);
55
56static int	smcphy_service(struct mii_softc *, struct mii_data *, int);
57static void	smcphy_reset(struct mii_softc *);
58static void	smcphy_auto(struct mii_softc *, int);
59static void	smcphy_status(struct mii_softc *);
60
61static device_method_t smcphy_methods[] = {
62	/* device interface */
63	DEVMETHOD(device_probe,		smcphy_probe),
64	DEVMETHOD(device_attach,	smcphy_attach),
65	DEVMETHOD(device_detach,	mii_phy_detach),
66	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
67	DEVMETHOD_END
68};
69
70static devclass_t smcphy_devclass;
71
72static driver_t smcphy_driver = {
73	"smcphy",
74	smcphy_methods,
75	sizeof(struct mii_softc)
76};
77
78DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0);
79
80static const struct mii_phydesc smcphys[] = {
81	MII_PHY_DESC(SEEQ, 80220),
82	MII_PHY_DESC(SEEQ, 84220),
83	MII_PHY_END
84};
85
86static const struct mii_phy_funcs smcphy80220_funcs = {
87	smcphy_service,
88	smcphy_status,
89	mii_phy_reset
90};
91
92static const struct mii_phy_funcs smcphy_funcs = {
93	smcphy_service,
94	smcphy_status,
95	smcphy_reset
96};
97
98static int
99smcphy_probe(device_t dev)
100{
101
102	return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
103}
104
105static int
106smcphy_attach(device_t dev)
107{
108	struct mii_softc *sc;
109	struct mii_attach_args *ma;
110	const struct mii_phy_funcs *mpf;
111
112	sc = device_get_softc(dev);
113	ma = device_get_ivars(dev);
114	if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
115		mpf = &smcphy80220_funcs;
116	else
117		mpf = &smcphy_funcs;
118	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
119	mii_phy_setmedia(sc);
120
121	return (0);
122}
123
124static int
125smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
126{
127        struct	ifmedia_entry *ife;
128        int	reg;
129
130	ife = mii->mii_media.ifm_cur;
131
132        switch (cmd) {
133        case MII_POLLSTAT:
134                break;
135
136        case MII_MEDIACHG:
137		switch (IFM_SUBTYPE(ife->ifm_media)) {
138		case IFM_AUTO:
139			smcphy_auto(sc, ife->ifm_media);
140			break;
141
142		default:
143                	mii_phy_setmedia(sc);
144			break;
145		}
146
147                break;
148
149        case MII_TICK:
150		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
151			break;
152		}
153
154		/* I have no idea why BMCR_ISO gets set. */
155		reg = PHY_READ(sc, MII_BMCR);
156		if (reg & BMCR_ISO) {
157			PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
158		}
159
160		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
161		if (reg & BMSR_LINK) {
162			sc->mii_ticks = 0;
163			break;
164		}
165
166		if (++sc->mii_ticks <= MII_ANEGTICKS) {
167			break;
168		}
169
170		sc->mii_ticks = 0;
171		PHY_RESET(sc);
172		smcphy_auto(sc, ife->ifm_media);
173                break;
174        }
175
176        /* Update the media status. */
177        PHY_STATUS(sc);
178
179        /* Callback if something changed. */
180        mii_phy_update(sc, cmd);
181        return (0);
182}
183
184static void
185smcphy_reset(struct mii_softc *sc)
186{
187	u_int	bmcr;
188	int	timeout;
189
190	PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
191
192	for (timeout = 2; timeout > 0; timeout--) {
193		DELAY(50000);
194		bmcr = PHY_READ(sc, MII_BMCR);
195		if ((bmcr & BMCR_RESET) == 0)
196			break;
197	}
198
199	if (bmcr & BMCR_RESET)
200		device_printf(sc->mii_dev, "reset failed\n");
201
202	PHY_WRITE(sc, MII_BMCR, 0x3000);
203
204	/* Mask interrupts, we poll instead. */
205	PHY_WRITE(sc, 0x1e, 0xffc0);
206}
207
208static void
209smcphy_auto(struct mii_softc *sc, int media)
210{
211	uint16_t	anar;
212
213	anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
214	if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
215		anar |= ANAR_FC;
216	PHY_WRITE(sc, MII_ANAR, anar);
217	/* Apparently this helps. */
218	anar = PHY_READ(sc, MII_ANAR);
219	PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
220}
221
222static void
223smcphy_status(struct mii_softc *sc)
224{
225	struct mii_data *mii;
226	uint32_t bmcr, bmsr, status;
227
228	mii = sc->mii_pdata;
229	mii->mii_media_status = IFM_AVALID;
230	mii->mii_media_active = IFM_ETHER;
231
232	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
233	if ((bmsr & BMSR_LINK) != 0)
234		mii->mii_media_status |= IFM_ACTIVE;
235
236	bmcr = PHY_READ(sc, MII_BMCR);
237	if ((bmcr & BMCR_ISO) != 0) {
238		mii->mii_media_active |= IFM_NONE;
239		mii->mii_media_status = 0;
240		return;
241	}
242
243	if ((bmcr & BMCR_LOOP) != 0)
244		mii->mii_media_active |= IFM_LOOP;
245
246	if ((bmcr & BMCR_AUTOEN) != 0) {
247		if ((bmsr & BMSR_ACOMP) == 0) {
248			/* Erg, still trying, I guess... */
249			mii->mii_media_active |= IFM_NONE;
250			return;
251		}
252	}
253
254	status = PHY_READ(sc, 0x12);
255	if (status & 0x0080)
256		mii->mii_media_active |= IFM_100_TX;
257	else
258		mii->mii_media_active |= IFM_10_T;
259	if (status & 0x0040)
260		mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
261	else
262		mii->mii_media_active |= IFM_HDX;
263}
264