xref: /freebsd/sys/dev/dc/pnphy.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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("$FreeBSD$");
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 <dev/dc/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 
77 static int pnphy_probe(device_t);
78 static int pnphy_attach(device_t);
79 
80 static 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 
89 static devclass_t pnphy_devclass;
90 
91 static driver_t pnphy_driver = {
92 	"pnphy",
93 	pnphy_methods,
94 	sizeof(struct mii_softc)
95 };
96 
97 DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
98 
99 static int	pnphy_service(struct mii_softc *, struct mii_data *, int);
100 static void	pnphy_status(struct mii_softc *);
101 
102 static int
103 pnphy_probe(device_t dev)
104 {
105 	struct mii_attach_args *ma;
106 
107 	ma = device_get_ivars(dev);
108 
109 	/*
110 	 * The dc driver will report the 82c168 vendor and device
111 	 * ID to let us know that it wants us to attach.
112 	 */
113 	if (ma->mii_id1 != DC_VENDORID_LO ||
114 	    ma->mii_id2 != DC_DEVICEID_82C168)
115 		return(ENXIO);
116 
117 	device_set_desc(dev, "PNIC 82c168 media interface");
118 
119 	return (BUS_PROBE_DEFAULT);
120 }
121 
122 static int
123 pnphy_attach(device_t dev)
124 {
125 	struct mii_softc *sc;
126 	struct mii_attach_args *ma;
127 	struct mii_data *mii;
128 
129 	sc = device_get_softc(dev);
130 	ma = device_get_ivars(dev);
131 	sc->mii_dev = device_get_parent(dev);
132 	mii = device_get_softc(sc->mii_dev);
133 	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
134 
135 	sc->mii_inst = mii->mii_instance;
136 	sc->mii_phy = ma->mii_phyno;
137 	sc->mii_service = pnphy_service;
138 	sc->mii_pdata = mii;
139 
140 	sc->mii_flags |= MIIF_NOISOLATE;
141 	mii->mii_instance++;
142 
143 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
144 
145 	sc->mii_capabilities =
146 	    BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
147 	sc->mii_capabilities &= ma->mii_capmask;
148 	device_printf(dev, " ");
149 	mii_add_media(sc);
150 	printf("\n");
151 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
152 	    BMCR_ISO);
153 
154 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
155 	    BMCR_LOOP|BMCR_S100);
156 
157 #undef ADD
158 
159 	MIIBUS_MEDIAINIT(sc->mii_dev);
160 	return(0);
161 }
162 
163 static int
164 pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
165 {
166 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
167 
168 	switch (cmd) {
169 	case MII_POLLSTAT:
170 		/*
171 		 * If we're not polling our PHY instance, just return.
172 		 */
173 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
174 			return (0);
175 		}
176 		break;
177 
178 	case MII_MEDIACHG:
179 		/*
180 		 * If the media indicates a different PHY instance,
181 		 * isolate ourselves.
182 		 */
183 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
184 			return (0);
185 
186 		/*
187 		 * If the interface is not up, don't do anything.
188 		 */
189 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
190 			break;
191 
192 		sc->mii_flags = 0;
193 
194 		switch (IFM_SUBTYPE(ife->ifm_media)) {
195 		case IFM_AUTO:
196 			/* NWAY is busted on this chip */
197 		case IFM_100_T4:
198 			/*
199 			 * XXX Not supported as a manual setting right now.
200 			 */
201 			return (EINVAL);
202 		case IFM_100_TX:
203 			mii->mii_media_active = IFM_ETHER|IFM_100_TX;
204 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
205 				mii->mii_media_active |= IFM_FDX;
206 			MIIBUS_STATCHG(sc->mii_dev);
207 			return(0);
208 		case IFM_10_T:
209 			mii->mii_media_active = IFM_ETHER|IFM_10_T;
210 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
211 				mii->mii_media_active |= IFM_FDX;
212 			MIIBUS_STATCHG(sc->mii_dev);
213 			return(0);
214 		default:
215 			return(EINVAL);
216 		}
217 		break;
218 
219 	case MII_TICK:
220 		/*
221 		 * If we're not currently selected, just return.
222 		 */
223 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
224 			return (0);
225 
226 		/*
227 		 * Is the interface even up?
228 		 */
229 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
230 			return (0);
231 
232 		break;
233 	}
234 
235 	/* Update the media status. */
236 	pnphy_status(sc);
237 
238 	/* Callback if something changed. */
239 	mii_phy_update(sc, cmd);
240 	return (0);
241 }
242 
243 static void
244 pnphy_status(struct mii_softc *sc)
245 {
246 	struct mii_data *mii = sc->mii_pdata;
247 	int reg;
248 	struct dc_softc		*dc_sc;
249 
250 	dc_sc = mii->mii_ifp->if_softc;
251 
252 	mii->mii_media_status = IFM_AVALID;
253 	mii->mii_media_active = IFM_ETHER;
254 
255 	reg = CSR_READ_4(dc_sc, DC_ISR);
256 
257 	if (!(reg & DC_ISR_LINKFAIL))
258 		mii->mii_media_status |= IFM_ACTIVE;
259 
260 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
261 		mii->mii_media_active |= IFM_10_T;
262 	else
263 		mii->mii_media_active |= IFM_100_TX;
264 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
265 		mii->mii_media_active |= IFM_FDX;
266 
267 	return;
268 }
269