1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 Benno Rice.  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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
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 driver_t smcphy_driver = {
71	"smcphy",
72	smcphy_methods,
73	sizeof(struct mii_softc)
74};
75
76DRIVER_MODULE(smcphy, miibus, smcphy_driver, 0, 0);
77
78static const struct mii_phydesc smcphys[] = {
79	MII_PHY_DESC(SEEQ, 80220),
80	MII_PHY_DESC(SEEQ, 84220),
81	MII_PHY_END
82};
83
84static const struct mii_phy_funcs smcphy80220_funcs = {
85	smcphy_service,
86	smcphy_status,
87	mii_phy_reset
88};
89
90static const struct mii_phy_funcs smcphy_funcs = {
91	smcphy_service,
92	smcphy_status,
93	smcphy_reset
94};
95
96static int
97smcphy_probe(device_t dev)
98{
99
100	return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
101}
102
103static int
104smcphy_attach(device_t dev)
105{
106	struct mii_softc *sc;
107	struct mii_attach_args *ma;
108	const struct mii_phy_funcs *mpf;
109
110	sc = device_get_softc(dev);
111	ma = device_get_ivars(dev);
112	if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
113		mpf = &smcphy80220_funcs;
114	else
115		mpf = &smcphy_funcs;
116	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
117	mii_phy_setmedia(sc);
118
119	return (0);
120}
121
122static int
123smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
124{
125        struct	ifmedia_entry *ife;
126        int	reg;
127
128	ife = mii->mii_media.ifm_cur;
129
130        switch (cmd) {
131        case MII_POLLSTAT:
132                break;
133
134        case MII_MEDIACHG:
135		switch (IFM_SUBTYPE(ife->ifm_media)) {
136		case IFM_AUTO:
137			smcphy_auto(sc, ife->ifm_media);
138			break;
139
140		default:
141                	mii_phy_setmedia(sc);
142			break;
143		}
144
145                break;
146
147        case MII_TICK:
148		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
149			break;
150		}
151
152		/* I have no idea why BMCR_ISO gets set. */
153		reg = PHY_READ(sc, MII_BMCR);
154		if (reg & BMCR_ISO) {
155			PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
156		}
157
158		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
159		if (reg & BMSR_LINK) {
160			sc->mii_ticks = 0;
161			break;
162		}
163
164		if (++sc->mii_ticks <= MII_ANEGTICKS) {
165			break;
166		}
167
168		sc->mii_ticks = 0;
169		PHY_RESET(sc);
170		smcphy_auto(sc, ife->ifm_media);
171                break;
172        }
173
174        /* Update the media status. */
175        PHY_STATUS(sc);
176
177        /* Callback if something changed. */
178        mii_phy_update(sc, cmd);
179        return (0);
180}
181
182static void
183smcphy_reset(struct mii_softc *sc)
184{
185	u_int	bmcr;
186	int	timeout;
187
188	PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
189
190	for (timeout = 2; timeout > 0; timeout--) {
191		DELAY(50000);
192		bmcr = PHY_READ(sc, MII_BMCR);
193		if ((bmcr & BMCR_RESET) == 0)
194			break;
195	}
196
197	if (bmcr & BMCR_RESET)
198		device_printf(sc->mii_dev, "reset failed\n");
199
200	PHY_WRITE(sc, MII_BMCR, 0x3000);
201
202	/* Mask interrupts, we poll instead. */
203	PHY_WRITE(sc, 0x1e, 0xffc0);
204}
205
206static void
207smcphy_auto(struct mii_softc *sc, int media)
208{
209	uint16_t	anar;
210
211	anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
212	if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
213		anar |= ANAR_FC;
214	PHY_WRITE(sc, MII_ANAR, anar);
215	/* Apparently this helps. */
216	anar = PHY_READ(sc, MII_ANAR);
217	PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
218}
219
220static void
221smcphy_status(struct mii_softc *sc)
222{
223	struct mii_data *mii;
224	uint32_t bmcr, bmsr, status;
225
226	mii = sc->mii_pdata;
227	mii->mii_media_status = IFM_AVALID;
228	mii->mii_media_active = IFM_ETHER;
229
230	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
231	if ((bmsr & BMSR_LINK) != 0)
232		mii->mii_media_status |= IFM_ACTIVE;
233
234	bmcr = PHY_READ(sc, MII_BMCR);
235	if ((bmcr & BMCR_ISO) != 0) {
236		mii->mii_media_active |= IFM_NONE;
237		mii->mii_media_status = 0;
238		return;
239	}
240
241	if ((bmcr & BMCR_LOOP) != 0)
242		mii->mii_media_active |= IFM_LOOP;
243
244	if ((bmcr & BMCR_AUTOEN) != 0) {
245		if ((bmsr & BMSR_ACOMP) == 0) {
246			/* Erg, still trying, I guess... */
247			mii->mii_media_active |= IFM_NONE;
248			return;
249		}
250	}
251
252	status = PHY_READ(sc, 0x12);
253	if (status & 0x0080)
254		mii->mii_media_active |= IFM_100_TX;
255	else
256		mii->mii_media_active |= IFM_10_T;
257	if (status & 0x0040)
258		mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
259	else
260		mii->mii_media_active |= IFM_HDX;
261}
262