FreeBSD/Linux Kernel Cross Reference
sys/dev/dc/pnphy.c
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: releng/8.3/sys/dev/dc/pnphy.c 230718 2012-01-29 01:35:14Z marius $");
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 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 devclass_t pnphy_devclass;
82
83 static driver_t pnphy_driver = {
84 "pnphy",
85 pnphy_methods,
86 sizeof(struct mii_softc)
87 };
88
89 DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
90
91 static int pnphy_service(struct mii_softc *, struct mii_data *, int);
92 static void pnphy_status(struct mii_softc *);
93
94 static int
95 pnphy_probe(device_t dev)
96 {
97 struct mii_attach_args *ma;
98
99 ma = device_get_ivars(dev);
100
101 /*
102 * The dc driver will report the 82c168 vendor and device
103 * ID to let us know that it wants us to attach.
104 */
105 if (ma->mii_id1 != DC_VENDORID_LO ||
106 ma->mii_id2 != DC_DEVICEID_82C168)
107 return (ENXIO);
108
109 device_set_desc(dev, "PNIC 82c168 media interface");
110
111 return (BUS_PROBE_DEFAULT);
112 }
113
114 static int
115 pnphy_attach(device_t dev)
116 {
117 struct mii_softc *sc;
118 struct mii_attach_args *ma;
119 struct mii_data *mii;
120
121 sc = device_get_softc(dev);
122 ma = device_get_ivars(dev);
123 sc->mii_dev = device_get_parent(dev);
124 mii = ma->mii_data;
125 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
126
127 sc->mii_flags = miibus_get_flags(dev);
128 sc->mii_inst = mii->mii_instance++;
129 sc->mii_phy = ma->mii_phyno;
130 sc->mii_service = pnphy_service;
131 sc->mii_pdata = mii;
132
133 /*
134 * Apparently, we can neither isolate nor do loopback.
135 */
136 sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP | MIIF_NOMANPAUSE;
137
138 sc->mii_capabilities =
139 BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
140 sc->mii_capabilities &= ma->mii_capmask;
141 device_printf(dev, " ");
142 mii_phy_add_media(sc);
143 printf("\n");
144
145 MIIBUS_MEDIAINIT(sc->mii_dev);
146 return (0);
147 }
148
149 static int
150 pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
151 {
152 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
153
154 switch (cmd) {
155 case MII_POLLSTAT:
156 break;
157
158 case MII_MEDIACHG:
159 /*
160 * If the interface is not up, don't do anything.
161 */
162 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
163 break;
164
165 /*
166 * Note that auto-negotiation is broken on this chip.
167 */
168 switch (IFM_SUBTYPE(ife->ifm_media)) {
169 case IFM_100_TX:
170 mii->mii_media_active = IFM_ETHER | IFM_100_TX;
171 if ((ife->ifm_media & IFM_FDX) != 0)
172 mii->mii_media_active |= IFM_FDX;
173 MIIBUS_STATCHG(sc->mii_dev);
174 return (0);
175 case IFM_10_T:
176 mii->mii_media_active = IFM_ETHER | IFM_10_T;
177 if ((ife->ifm_media & IFM_FDX) != 0)
178 mii->mii_media_active |= IFM_FDX;
179 MIIBUS_STATCHG(sc->mii_dev);
180 return (0);
181 default:
182 return (EINVAL);
183 }
184 break;
185
186 case MII_TICK:
187 /*
188 * Is the interface even up?
189 */
190 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
191 return (0);
192
193 break;
194 }
195
196 /* Update the media status. */
197 pnphy_status(sc);
198
199 /* Callback if something changed. */
200 mii_phy_update(sc, cmd);
201 return (0);
202 }
203
204 static void
205 pnphy_status(struct mii_softc *sc)
206 {
207 struct mii_data *mii = sc->mii_pdata;
208 int reg;
209 struct dc_softc *dc_sc;
210
211 dc_sc = mii->mii_ifp->if_softc;
212
213 mii->mii_media_status = IFM_AVALID;
214 mii->mii_media_active = IFM_ETHER;
215
216 reg = CSR_READ_4(dc_sc, DC_ISR);
217 if (!(reg & DC_ISR_LINKFAIL))
218 mii->mii_media_status |= IFM_ACTIVE;
219 reg = CSR_READ_4(dc_sc, DC_NETCFG);
220 if (reg & DC_NETCFG_SPEEDSEL)
221 mii->mii_media_active |= IFM_10_T;
222 else
223 mii->mii_media_active |= IFM_100_TX;
224 if (reg & DC_NETCFG_FULLDUPLEX)
225 mii->mii_media_active |= IFM_FDX;
226 else
227 mii->mii_media_active |= IFM_HDX;
228 }
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