1/*-
2 * Copyright (c) 2000
3 *	Bill Paul <wpaul@ee.columbia.edu>.  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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36/*
37 * driver for the XaQti XMAC II's internal PHY. This is sort of
38 * like a 10/100 PHY, except the only thing we're really autoselecting
39 * here is full/half duplex. Speed is always 1000mbps.
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
45#include <sys/module.h>
46#include <sys/socket.h>
47#include <sys/bus.h>
48
49#include <net/if.h>
50#include <net/if_media.h>
51
52#include <dev/mii/mii.h>
53#include <dev/mii/miivar.h>
54#include "miidevs.h"
55
56#include <dev/mii/xmphyreg.h>
57
58#include "miibus_if.h"
59
60static int xmphy_probe(device_t);
61static int xmphy_attach(device_t);
62
63static device_method_t xmphy_methods[] = {
64	/* device interface */
65	DEVMETHOD(device_probe,		xmphy_probe),
66	DEVMETHOD(device_attach,	xmphy_attach),
67	DEVMETHOD(device_detach,	mii_phy_detach),
68	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
69	DEVMETHOD_END
70};
71
72static devclass_t xmphy_devclass;
73
74static driver_t xmphy_driver = {
75	"xmphy",
76	xmphy_methods,
77	sizeof(struct mii_softc)
78};
79
80DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
81
82static int	xmphy_service(struct mii_softc *, struct mii_data *, int);
83static void	xmphy_status(struct mii_softc *);
84static int	xmphy_mii_phy_auto(struct mii_softc *);
85
86static const struct mii_phydesc xmphys[] = {
87	MII_PHY_DESC(xxJATO, BASEX),
88	MII_PHY_DESC(xxXAQTI, XMACII),
89	MII_PHY_END
90};
91
92static const struct mii_phy_funcs xmphy_funcs = {
93	xmphy_service,
94	xmphy_status,
95	mii_phy_reset
96};
97
98static int
99xmphy_probe(device_t dev)
100{
101
102	return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
103}
104
105static int
106xmphy_attach(device_t dev)
107{
108	struct mii_softc *sc;
109	const char *sep = "";
110
111	sc = device_get_softc(dev);
112
113	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
114	    &xmphy_funcs, 0);
115	sc->mii_anegticks = MII_ANEGTICKS;
116
117	PHY_RESET(sc);
118
119#define	ADD(m)		ifmedia_add(&sc->mii_pdata->mii_media, (m), 0, NULL)
120#define PRINT(s)	printf("%s%s", sep, s); sep = ", "
121
122	device_printf(dev, " ");
123	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst));
124	PRINT("1000baseSX");
125	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst));
126	PRINT("1000baseSX-FDX");
127	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst));
128	PRINT("auto");
129
130	printf("\n");
131
132#undef ADD
133#undef PRINT
134
135	MIIBUS_MEDIAINIT(sc->mii_dev);
136	return (0);
137}
138
139static int
140xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
141{
142	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
143	int reg;
144
145	switch (cmd) {
146	case MII_POLLSTAT:
147		break;
148
149	case MII_MEDIACHG:
150		switch (IFM_SUBTYPE(ife->ifm_media)) {
151		case IFM_AUTO:
152#ifdef foo
153			/*
154			 * If we're already in auto mode, just return.
155			 */
156			if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
157				return (0);
158#endif
159			(void)xmphy_mii_phy_auto(sc);
160			break;
161		case IFM_1000_SX:
162			PHY_RESET(sc);
163			if ((ife->ifm_media & IFM_FDX) != 0) {
164				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
165				PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
166			} else {
167				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
168				PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
169			}
170			break;
171		default:
172			return (EINVAL);
173		}
174		break;
175
176	case MII_TICK:
177		/*
178		 * Only used for autonegotiation.
179		 */
180		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
181			break;
182
183		/*
184		 * Check to see if we have link.  If we do, we don't
185		 * need to restart the autonegotiation process.  Read
186		 * the BMSR twice in case it's latched.
187		 */
188		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
189		if (reg & BMSR_LINK)
190			break;
191
192		/* Only retry autonegotiation every mii_anegticks seconds. */
193		if (sc->mii_ticks <= sc->mii_anegticks)
194			break;
195
196		sc->mii_ticks = 0;
197
198		PHY_RESET(sc);
199		xmphy_mii_phy_auto(sc);
200		return (0);
201	}
202
203	/* Update the media status. */
204	xmphy_status(sc);
205
206	/* Callback if something changed. */
207	mii_phy_update(sc, cmd);
208	return (0);
209}
210
211static void
212xmphy_status(struct mii_softc *sc)
213{
214	struct mii_data *mii = sc->mii_pdata;
215	int bmsr, bmcr, anlpar;
216
217	mii->mii_media_status = IFM_AVALID;
218	mii->mii_media_active = IFM_ETHER;
219
220	bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
221	    PHY_READ(sc, XMPHY_MII_BMSR);
222	if (bmsr & XMPHY_BMSR_LINK)
223		mii->mii_media_status |= IFM_ACTIVE;
224
225	/* Do dummy read of extended status register. */
226	bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
227
228	bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
229
230	if (bmcr & XMPHY_BMCR_LOOP)
231		mii->mii_media_active |= IFM_LOOP;
232
233	if (bmcr & XMPHY_BMCR_AUTOEN) {
234		if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
235			if (bmsr & XMPHY_BMSR_LINK) {
236				mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
237				return;
238			}
239			/* Erg, still trying, I guess... */
240			mii->mii_media_active |= IFM_NONE;
241			return;
242		}
243
244		mii->mii_media_active |= IFM_1000_SX;
245		anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
246		    PHY_READ(sc, XMPHY_MII_ANLPAR);
247		if (anlpar & XMPHY_ANLPAR_FDX)
248			mii->mii_media_active |= IFM_FDX;
249		else
250			mii->mii_media_active |= IFM_HDX;
251		return;
252	}
253
254	mii->mii_media_active |= IFM_1000_SX;
255	if (bmcr & XMPHY_BMCR_FDX)
256		mii->mii_media_active |= IFM_FDX;
257	else
258		mii->mii_media_active |= IFM_HDX;
259}
260
261static int
262xmphy_mii_phy_auto(struct mii_softc *mii)
263{
264	int anar = 0;
265
266	anar = PHY_READ(mii, XMPHY_MII_ANAR);
267	anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
268	PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
269	DELAY(1000);
270	PHY_WRITE(mii, XMPHY_MII_BMCR,
271	    XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
272
273	return (EJUSTRETURN);
274}
275