xref: /dragonfly/sys/dev/netif/mii_layer/pnphy.c (revision d3c9c58e)
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: src/sys/dev/mii/pnphy.c,v 1.1.2.1 2002/11/08 21:53:49 semenu Exp $
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 #include <net/if_poll.h>
54 
55 #include "mii.h"
56 #include "miivar.h"
57 #include "miidevs.h"
58 
59 #include <machine/clock.h>
60 
61 #include "../dc/if_dcreg.h"
62 
63 #include "miibus_if.h"
64 
65 #define DC_SETBIT(sc, reg, x)                           \
66         CSR_WRITE_4(sc, reg,                            \
67                 CSR_READ_4(sc, reg) | x)
68 
69 #define DC_CLRBIT(sc, reg, x)                           \
70         CSR_WRITE_4(sc, reg,                            \
71                 CSR_READ_4(sc, reg) & ~x)
72 
73 static int pnphy_probe		(device_t);
74 static int pnphy_attach		(device_t);
75 
76 static device_method_t pnphy_methods[] = {
77 	/* device interface */
78 	DEVMETHOD(device_probe,		pnphy_probe),
79 	DEVMETHOD(device_attach,	pnphy_attach),
80 	DEVMETHOD(device_detach,	ukphy_detach),
81 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
82 	DEVMETHOD_END
83 };
84 
85 static devclass_t pnphy_devclass;
86 
87 static driver_t pnphy_driver = {
88 	"pnphy",
89 	pnphy_methods,
90 	sizeof(struct mii_softc)
91 };
92 
93 DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, NULL, NULL);
94 
95 static int	pnphy_service(struct mii_softc *, struct mii_data *, int);
96 static void	pnphy_status(struct mii_softc *);
97 
98 static int
pnphy_probe(device_t dev)99 pnphy_probe(device_t dev)
100 {
101 	struct mii_attach_args *ma;
102 
103 	ma = device_get_ivars(dev);
104 
105 	/*
106 	 * The dc driver will report the 82c168 vendor and device
107 	 * ID to let us know that it wants us to attach.
108 	 */
109 	if (ma->mii_id1 != DC_VENDORID_LO ||
110 	    ma->mii_id2 != DC_DEVICEID_82C168)
111 		return(ENXIO);
112 
113 	device_set_desc(dev, "PNIC 82c168 media interface");
114 
115 	return (0);
116 }
117 
118 static int
pnphy_attach(device_t dev)119 pnphy_attach(device_t dev)
120 {
121 	struct mii_softc *sc;
122 	struct mii_attach_args *ma;
123 	struct mii_data *mii;
124 
125 	sc = device_get_softc(dev);
126 	ma = device_get_ivars(dev);
127 	mii_softc_init(sc, ma);
128 	sc->mii_dev = device_get_parent(dev);
129 	mii = device_get_softc(sc->mii_dev);
130 	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
131 
132 	sc->mii_inst = mii->mii_instance;
133 	sc->mii_service = pnphy_service;
134 	sc->mii_pdata = mii;
135 
136 	sc->mii_flags |= MIIF_NOISOLATE;
137 	mii->mii_instance++;
138 
139 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
140 
141 	sc->mii_capabilities =
142 	    BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
143 	sc->mii_capabilities &= ma->mii_capmask;
144 	device_printf(dev, " ");
145 	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
146 		kprintf("no media present");
147 	else
148 		mii_phy_add_media(sc);
149 	kprintf("\n");
150 
151 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
152 	    MII_MEDIA_NONE);
153 
154 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
155 	    MII_MEDIA_100_TX);
156 
157 #undef ADD
158 
159 	MIIBUS_MEDIAINIT(sc->mii_dev);
160 	return(0);
161 }
162 
163 static int
pnphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)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 			break;
209 		case IFM_10_T:
210 			mii->mii_media_active = IFM_ETHER|IFM_10_T;
211 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
212 				mii->mii_media_active |= IFM_FDX;
213 			MIIBUS_STATCHG(sc->mii_dev);
214 			return(0);
215 			break;
216 		default:
217 			return(EINVAL);
218 			break;
219 		}
220 		break;
221 
222 	case MII_TICK:
223 		/*
224 		 * If we're not currently selected, just return.
225 		 */
226 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
227 			return (0);
228 
229 		/*
230 		 * Is the interface even up?
231 		 */
232 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
233 			return (0);
234 
235 		/*
236 		 * Only used for autonegotiation.
237 		 */
238 		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
239 			break;
240 
241 		/*
242 		 * This PHY's autonegotiation doesn't need to be kicked.
243 		 */
244 		return(0);
245 	}
246 
247 	/* Update the media status. */
248 	pnphy_status(sc);
249 
250 	/* Callback if something changed. */
251 	mii_phy_update(sc, cmd);
252 	return (0);
253 }
254 
255 static void
pnphy_status(struct mii_softc * sc)256 pnphy_status(struct mii_softc *sc)
257 {
258 	struct mii_data *mii = sc->mii_pdata;
259 	struct dc_softc *dc_sc = mii->mii_ifp->if_softc;
260 	int reg;
261 
262 	mii->mii_media_status = IFM_AVALID;
263 	mii->mii_media_active = IFM_ETHER;
264 
265 	reg = CSR_READ_4(dc_sc, DC_ISR);
266 
267 	if (!(reg & DC_ISR_LINKFAIL))
268 		mii->mii_media_status |= IFM_ACTIVE;
269 
270 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
271 		mii->mii_media_active |= IFM_10_T;
272 	else
273 		mii->mii_media_active |= IFM_100_TX;
274 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
275 		mii->mii_media_active |= IFM_FDX;
276 }
277