pnphy.c revision 146734 
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
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/dc/pnphy.c 146734 2005-05-29 04:42:30Z nyan $");
35
36/*
37 * Pseudo-driver for media selection on the Lite-On PNIC 82c168
38 * chip. The NWAY support on this chip is horribly broken, so we
39 * only support manual mode selection. This is lame, but getting
40 * NWAY to work right is amazingly difficult.
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/kernel.h>
46#include <sys/socket.h>
47#include <sys/errno.h>
48#include <sys/lock.h>
49#include <sys/module.h>
50#include <sys/mutex.h>
51#include <sys/bus.h>
52
53#include <net/if.h>
54#include <net/if_arp.h>
55#include <net/if_media.h>
56
57#include <dev/mii/mii.h>
58#include <dev/mii/miivar.h>
59#include "miidevs.h"
60
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#define DC_SETBIT(sc, reg, x)                           \
70        CSR_WRITE_4(sc, reg,                            \
71                CSR_READ_4(sc, reg) | x)
72
73#define DC_CLRBIT(sc, reg, x)                           \
74        CSR_WRITE_4(sc, reg,                            \
75                CSR_READ_4(sc, reg) & ~x)
76
77static int pnphy_probe(device_t);
78static int pnphy_attach(device_t);
79
80static device_method_t pnphy_methods[] = {
81	/* device interface */
82	DEVMETHOD(device_probe,		pnphy_probe),
83	DEVMETHOD(device_attach,	pnphy_attach),
84	DEVMETHOD(device_detach,	mii_phy_detach),
85	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
86	{ 0, 0 }
87};
88
89static devclass_t pnphy_devclass;
90
91static driver_t pnphy_driver = {
92	"pnphy",
93	pnphy_methods,
94	sizeof(struct mii_softc)
95};
96
97DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
98
99static int	pnphy_service(struct mii_softc *, struct mii_data *, int);
100static void	pnphy_status(struct mii_softc *);
101
102static int
103pnphy_probe(dev)
104	device_t		dev;
105{
106	struct mii_attach_args *ma;
107
108	ma = device_get_ivars(dev);
109
110	/*
111	 * The dc driver will report the 82c168 vendor and device
112	 * ID to let us know that it wants us to attach.
113	 */
114	if (ma->mii_id1 != DC_VENDORID_LO ||
115	    ma->mii_id2 != DC_DEVICEID_82C168)
116		return(ENXIO);
117
118	device_set_desc(dev, "PNIC 82c168 media interface");
119
120	return (0);
121}
122
123static int
124pnphy_attach(dev)
125	device_t		dev;
126{
127	struct mii_softc *sc;
128	struct mii_attach_args *ma;
129	struct mii_data *mii;
130
131	sc = device_get_softc(dev);
132	ma = device_get_ivars(dev);
133	sc->mii_dev = device_get_parent(dev);
134	mii = device_get_softc(sc->mii_dev);
135	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
136
137	sc->mii_inst = mii->mii_instance;
138	sc->mii_phy = ma->mii_phyno;
139	sc->mii_service = pnphy_service;
140	sc->mii_pdata = mii;
141
142	sc->mii_flags |= MIIF_NOISOLATE;
143	mii->mii_instance++;
144
145#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
146
147	sc->mii_capabilities =
148	    BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
149	sc->mii_capabilities &= ma->mii_capmask;
150	device_printf(dev, " ");
151	mii_add_media(sc);
152	printf("\n");
153	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
154	    BMCR_ISO);
155
156	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
157	    BMCR_LOOP|BMCR_S100);
158
159#undef ADD
160
161	MIIBUS_MEDIAINIT(sc->mii_dev);
162	return(0);
163}
164
165static int
166pnphy_service(sc, mii, cmd)
167	struct mii_softc *sc;
168	struct mii_data *mii;
169	int cmd;
170{
171	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
172
173	switch (cmd) {
174	case MII_POLLSTAT:
175		/*
176		 * If we're not polling our PHY instance, just return.
177		 */
178		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
179			return (0);
180		}
181		break;
182
183	case MII_MEDIACHG:
184		/*
185		 * If the media indicates a different PHY instance,
186		 * isolate ourselves.
187		 */
188		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
189			return (0);
190
191		/*
192		 * If the interface is not up, don't do anything.
193		 */
194		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
195			break;
196
197		sc->mii_flags = 0;
198
199		switch (IFM_SUBTYPE(ife->ifm_media)) {
200		case IFM_AUTO:
201			/* NWAY is busted on this chip */
202		case IFM_100_T4:
203			/*
204			 * XXX Not supported as a manual setting right now.
205			 */
206			return (EINVAL);
207		case IFM_100_TX:
208			mii->mii_media_active = IFM_ETHER|IFM_100_TX;
209			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
210				mii->mii_media_active |= IFM_FDX;
211			MIIBUS_STATCHG(sc->mii_dev);
212			return(0);
213		case IFM_10_T:
214			mii->mii_media_active = IFM_ETHER|IFM_10_T;
215			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
216				mii->mii_media_active |= IFM_FDX;
217			MIIBUS_STATCHG(sc->mii_dev);
218			return(0);
219		default:
220			return(EINVAL);
221		}
222		break;
223
224	case MII_TICK:
225		/*
226		 * If we're not currently selected, just return.
227		 */
228		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
229			return (0);
230
231		/*
232		 * Is the interface even up?
233		 */
234		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
235			return (0);
236
237		break;
238	}
239
240	/* Update the media status. */
241	pnphy_status(sc);
242
243	/* Callback if something changed. */
244	mii_phy_update(sc, cmd);
245	return (0);
246}
247
248static void
249pnphy_status(sc)
250	struct mii_softc *sc;
251{
252	struct mii_data *mii = sc->mii_pdata;
253	int reg;
254	struct dc_softc		*dc_sc;
255
256	dc_sc = mii->mii_ifp->if_softc;
257
258	mii->mii_media_status = IFM_AVALID;
259	mii->mii_media_active = IFM_ETHER;
260
261	reg = CSR_READ_4(dc_sc, DC_ISR);
262
263	if (!(reg & DC_ISR_LINKFAIL))
264		mii->mii_media_status |= IFM_ACTIVE;
265
266	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
267		mii->mii_media_active |= IFM_10_T;
268	else
269		mii->mii_media_active |= IFM_100_TX;
270	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
271		mii->mii_media_active |= IFM_FDX;
272
273	return;
274}
275