1 /*
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1997, 1998, 1999
5 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
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_var.h>
55 #include <net/if_arp.h>
56 #include <net/if_media.h>
57
58 #include <dev/mii/mii.h>
59 #include <dev/mii/miivar.h>
60 #include "miidevs.h"
61
62 #include <machine/bus.h>
63 #include <machine/resource.h>
64
65 #include <dev/dc/if_dcreg.h>
66
67 #include "miibus_if.h"
68
69 static int pnphy_probe(device_t);
70 static int pnphy_attach(device_t);
71
72 static device_method_t pnphy_methods[] = {
73 /* device interface */
74 DEVMETHOD(device_probe, pnphy_probe),
75 DEVMETHOD(device_attach, pnphy_attach),
76 DEVMETHOD(device_detach, mii_phy_detach),
77 DEVMETHOD(device_shutdown, bus_generic_shutdown),
78 DEVMETHOD_END
79 };
80
81 static driver_t pnphy_driver = {
82 "pnphy",
83 pnphy_methods,
84 sizeof(struct mii_softc)
85 };
86
87 DRIVER_MODULE(pnphy, miibus, pnphy_driver, 0, 0);
88
89 static int pnphy_service(struct mii_softc *, struct mii_data *, int);
90 static void pnphy_status(struct mii_softc *);
91 static void pnphy_reset(struct mii_softc *);
92
93 static const struct mii_phy_funcs pnphy_funcs = {
94 pnphy_service,
95 pnphy_status,
96 pnphy_reset
97 };
98
99 static int
pnphy_probe(device_t dev)100 pnphy_probe(device_t dev)
101 {
102 struct mii_attach_args *ma;
103
104 ma = device_get_ivars(dev);
105
106 /*
107 * The dc driver will report the 82c168 vendor and device
108 * ID to let us know that it wants us to attach.
109 */
110 if (ma->mii_id1 != DC_VENDORID_LO ||
111 ma->mii_id2 != DC_DEVICEID_82C168)
112 return (ENXIO);
113
114 device_set_desc(dev, "PNIC 82c168 media interface");
115
116 return (BUS_PROBE_DEFAULT);
117 }
118
119 static int
pnphy_attach(device_t dev)120 pnphy_attach(device_t dev)
121 {
122 struct mii_softc *sc;
123
124 sc = device_get_softc(dev);
125
126 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
127 &pnphy_funcs, 0);
128
129 sc->mii_capabilities =
130 BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
131 sc->mii_capabilities &= sc->mii_capmask;
132 device_printf(dev, " ");
133 mii_phy_add_media(sc);
134 printf("\n");
135
136 MIIBUS_MEDIAINIT(sc->mii_dev);
137 return (0);
138 }
139
140 static int
pnphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)141 pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
142 {
143 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
144
145 switch (cmd) {
146 case MII_POLLSTAT:
147 break;
148
149 case MII_MEDIACHG:
150 /*
151 * If the interface is not up, don't do anything.
152 */
153 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
154 break;
155
156 /*
157 * Note that auto-negotiation is broken on this chip.
158 */
159 switch (IFM_SUBTYPE(ife->ifm_media)) {
160 case IFM_100_TX:
161 mii->mii_media_active = IFM_ETHER | IFM_100_TX;
162 if ((ife->ifm_media & IFM_FDX) != 0)
163 mii->mii_media_active |= IFM_FDX;
164 MIIBUS_STATCHG(sc->mii_dev);
165 return (0);
166 case IFM_10_T:
167 mii->mii_media_active = IFM_ETHER | IFM_10_T;
168 if ((ife->ifm_media & IFM_FDX) != 0)
169 mii->mii_media_active |= IFM_FDX;
170 MIIBUS_STATCHG(sc->mii_dev);
171 return (0);
172 default:
173 return (EINVAL);
174 }
175 break;
176
177 case MII_TICK:
178 /*
179 * Is the interface even up?
180 */
181 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
182 return (0);
183
184 break;
185 }
186
187 /* Update the media status. */
188 PHY_STATUS(sc);
189
190 /* Callback if something changed. */
191 mii_phy_update(sc, cmd);
192 return (0);
193 }
194
195 static void
pnphy_status(struct mii_softc * sc)196 pnphy_status(struct mii_softc *sc)
197 {
198 struct mii_data *mii = sc->mii_pdata;
199 int reg;
200 struct dc_softc *dc_sc;
201
202 dc_sc = if_getsoftc(mii->mii_ifp);
203
204 mii->mii_media_status = IFM_AVALID;
205 mii->mii_media_active = IFM_ETHER;
206
207 reg = CSR_READ_4(dc_sc, DC_ISR);
208 if (!(reg & DC_ISR_LINKFAIL))
209 mii->mii_media_status |= IFM_ACTIVE;
210 reg = CSR_READ_4(dc_sc, DC_NETCFG);
211 if (reg & DC_NETCFG_SPEEDSEL)
212 mii->mii_media_active |= IFM_10_T;
213 else
214 mii->mii_media_active |= IFM_100_TX;
215 if (reg & DC_NETCFG_FULLDUPLEX)
216 mii->mii_media_active |= IFM_FDX;
217 else
218 mii->mii_media_active |= IFM_HDX;
219 }
220
221 static void
pnphy_reset(struct mii_softc * sc __unused)222 pnphy_reset(struct mii_softc *sc __unused)
223 {
224
225 }
226