pnphy.c revision 59391 
1/*
2 * Copyright (c) 1997, 1998, 1999
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 * $FreeBSD: head/sys/dev/dc/pnphy.c 59391 2000-04-19 14:58:28Z phk $
33 */
34
35/*
36 * Pseudo-driver for media selection on the Lite-On PNIC 82c168
37 * chip. The NWAY support on this chip is horribly broken, so we
38 * only support manual mode selection. This is lame, but getting
39 * NWAY to work right is amazingly difficult.
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
45#include <sys/socket.h>
46#include <sys/errno.h>
47#include <sys/module.h>
48#include <sys/bus.h>
49
50#include <net/if.h>
51#include <net/if_arp.h>
52#include <net/if_media.h>
53
54#include <dev/mii/mii.h>
55#include <dev/mii/miivar.h>
56#include <dev/mii/miidevs.h>
57
58#include <machine/clock.h>
59#include <machine/bus_pio.h>
60#include <machine/bus_memio.h>
61#include <machine/bus.h>
62#include <machine/resource.h>
63#include <sys/bus.h>
64
65#include <pci/if_dcreg.h>
66
67#include "miibus_if.h"
68
69#if !defined(lint)
70static const char rcsid[] =
71  "$FreeBSD: head/sys/dev/dc/pnphy.c 59391 2000-04-19 14:58:28Z phk $";
72#endif
73
74#define DC_SETBIT(sc, reg, x)                           \
75        CSR_WRITE_4(sc, reg,                            \
76                CSR_READ_4(sc, reg) | x)
77
78#define DC_CLRBIT(sc, reg, x)                           \
79        CSR_WRITE_4(sc, reg,                            \
80                CSR_READ_4(sc, reg) & ~x)
81
82static int pnphy_probe		__P((device_t));
83static int pnphy_attach		__P((device_t));
84static int pnphy_detach		__P((device_t));
85
86static device_method_t pnphy_methods[] = {
87	/* device interface */
88	DEVMETHOD(device_probe,		pnphy_probe),
89	DEVMETHOD(device_attach,	pnphy_attach),
90	DEVMETHOD(device_detach,	pnphy_detach),
91	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
92	{ 0, 0 }
93};
94
95static devclass_t pnphy_devclass;
96
97static driver_t pnphy_driver = {
98	"pnphy",
99	pnphy_methods,
100	sizeof(struct mii_softc)
101};
102
103DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
104
105int	pnphy_service __P((struct mii_softc *, struct mii_data *, int));
106void	pnphy_status __P((struct mii_softc *));
107
108static int pnphy_probe(dev)
109	device_t		dev;
110{
111	struct mii_attach_args *ma;
112
113	ma = device_get_ivars(dev);
114
115	/*
116	 * The dc driver will report the 82c168 vendor and device
117	 * ID to let us know that it wants us to attach.
118	 */
119	if (ma->mii_id1 != DC_VENDORID_LO ||
120	    ma->mii_id2 != DC_DEVICEID_82C168)
121		return(ENXIO);
122
123	device_set_desc(dev, "PNIC 82c168 media interface");
124
125	return (0);
126}
127
128static int pnphy_attach(dev)
129	device_t		dev;
130{
131	struct mii_softc *sc;
132	struct mii_attach_args *ma;
133	struct mii_data *mii;
134
135	sc = device_get_softc(dev);
136	ma = device_get_ivars(dev);
137	sc->mii_dev = device_get_parent(dev);
138	mii = device_get_softc(sc->mii_dev);
139	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
140
141	sc->mii_inst = mii->mii_instance;
142	sc->mii_phy = ma->mii_phyno;
143	sc->mii_service = pnphy_service;
144	sc->mii_pdata = mii;
145
146	sc->mii_flags |= MIIF_NOISOLATE;
147	mii->mii_instance++;
148
149#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
150
151	sc->mii_capabilities =
152	    BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
153	sc->mii_capabilities &= ma->mii_capmask;
154	device_printf(dev, " ");
155	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
156		printf("no media present");
157	else
158		mii_add_media(mii, sc->mii_capabilities, sc->mii_inst);
159	printf("\n");
160	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
161	    BMCR_ISO);
162
163	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
164	    BMCR_LOOP|BMCR_S100);
165
166#undef ADD
167
168	MIIBUS_MEDIAINIT(sc->mii_dev);
169	return(0);
170}
171
172static int pnphy_detach(dev)
173	device_t		dev;
174{
175	struct mii_softc *sc;
176	struct mii_data *mii;
177
178	sc = device_get_softc(dev);
179	mii = device_get_softc(device_get_parent(dev));
180	sc->mii_dev = NULL;
181	LIST_REMOVE(sc, mii_list);
182
183	return(0);
184}
185
186int
187pnphy_service(sc, mii, cmd)
188	struct mii_softc *sc;
189	struct mii_data *mii;
190	int cmd;
191{
192	struct dc_softc		*dc_sc;
193	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
194
195	dc_sc = mii->mii_ifp->if_softc;
196
197	switch (cmd) {
198	case MII_POLLSTAT:
199		/*
200		 * If we're not polling our PHY instance, just return.
201		 */
202		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
203			return (0);
204		}
205		break;
206
207	case MII_MEDIACHG:
208		/*
209		 * If the media indicates a different PHY instance,
210		 * isolate ourselves.
211		 */
212		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
213			return (0);
214
215		/*
216		 * If the interface is not up, don't do anything.
217		 */
218		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
219			break;
220
221		sc->mii_flags = 0;
222
223		switch (IFM_SUBTYPE(ife->ifm_media)) {
224		case IFM_AUTO:
225			/* NWAY is busted on this chip */
226		case IFM_100_T4:
227			/*
228			 * XXX Not supported as a manual setting right now.
229			 */
230			return (EINVAL);
231		case IFM_100_TX:
232			mii->mii_media_active = IFM_ETHER|IFM_100_TX;
233			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
234				mii->mii_media_active |= IFM_FDX;
235			MIIBUS_STATCHG(sc->mii_dev);
236			return(0);
237			break;
238		case IFM_10_T:
239			mii->mii_media_active = IFM_ETHER|IFM_10_T;
240			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
241				mii->mii_media_active |= IFM_FDX;
242			MIIBUS_STATCHG(sc->mii_dev);
243			return(0);
244			break;
245		default:
246			return(EINVAL);
247			break;
248		}
249		break;
250
251	case MII_TICK:
252		/*
253		 * If we're not currently selected, just return.
254		 */
255		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
256			return (0);
257
258		/*
259		 * Only used for autonegotiation.
260		 */
261		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
262			return (0);
263
264		/*
265		 * Is the interface even up?
266		 */
267		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
268			return (0);
269
270		return(0);
271	}
272
273	/* Update the media status. */
274	pnphy_status(sc);
275
276	/* Callback if something changed. */
277	if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
278		MIIBUS_STATCHG(sc->mii_dev);
279		sc->mii_active = mii->mii_media_active;
280	}
281	return (0);
282}
283
284void
285pnphy_status(sc)
286	struct mii_softc *sc;
287{
288	struct mii_data *mii = sc->mii_pdata;
289	int reg;
290	struct dc_softc		*dc_sc;
291
292	dc_sc = mii->mii_ifp->if_softc;
293
294	mii->mii_media_status = IFM_AVALID;
295	mii->mii_media_active = IFM_ETHER;
296
297	reg = CSR_READ_4(dc_sc, DC_ISR);
298
299	if (!(reg & DC_ISR_LINKFAIL))
300		mii->mii_media_status |= IFM_ACTIVE;
301
302	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
303		mii->mii_media_active |= IFM_10_T;
304	else
305		mii->mii_media_active |= IFM_100_TX;
306	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
307		mii->mii_media_active |= IFM_FDX;
308
309	return;
310}
311