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 internal NWAY support on DEC 21143 and workalike
38 * controllers. Technically we're abusing the miibus code to handle
39 * media selection and NWAY support here since there is no MII
40 * interface. However the logical operations are roughly the same,
41 * and the alternative is to create a fake MII interface in the driver,
42 * which is harder to do.
43 */
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/socket.h>
49 #include <sys/errno.h>
50 #include <sys/lock.h>
51 #include <sys/module.h>
52 #include <sys/mutex.h>
53 #include <sys/bus.h>
54
55 #include <net/if.h>
56 #include <net/if_var.h>
57 #include <net/if_arp.h>
58 #include <net/if_media.h>
59
60 #include <dev/mii/mii.h>
61 #include <dev/mii/miivar.h>
62 #include "miidevs.h"
63
64 #include <machine/bus.h>
65 #include <machine/resource.h>
66
67 #include <dev/pci/pcivar.h>
68
69 #include <dev/dc/if_dcreg.h>
70
71 #include "miibus_if.h"
72
73 #define DC_SETBIT(sc, reg, x) \
74 CSR_WRITE_4(sc, reg, \
75 CSR_READ_4(sc, reg) | x)
76
77 #define DC_CLRBIT(sc, reg, x) \
78 CSR_WRITE_4(sc, reg, \
79 CSR_READ_4(sc, reg) & ~x)
80
81 #define MIIF_AUTOTIMEOUT 0x0004
82
83 /*
84 * This is the subsystem ID for the built-in 21143 ethernet
85 * in several Compaq Presario systems. Apparently these are
86 * 10Mbps only, so we need to treat them specially.
87 */
88 #define COMPAQ_PRESARIO_ID 0xb0bb0e11
89
90 static int dcphy_probe(device_t);
91 static int dcphy_attach(device_t);
92
93 static device_method_t dcphy_methods[] = {
94 /* device interface */
95 DEVMETHOD(device_probe, dcphy_probe),
96 DEVMETHOD(device_attach, dcphy_attach),
97 DEVMETHOD(device_detach, mii_phy_detach),
98 DEVMETHOD(device_shutdown, bus_generic_shutdown),
99 DEVMETHOD_END
100 };
101
102 static driver_t dcphy_driver = {
103 "dcphy",
104 dcphy_methods,
105 sizeof(struct mii_softc)
106 };
107
108 DRIVER_MODULE(dcphy, miibus, dcphy_driver, 0, 0);
109
110 static int dcphy_service(struct mii_softc *, struct mii_data *, int);
111 static void dcphy_status(struct mii_softc *);
112 static void dcphy_reset(struct mii_softc *);
113 static int dcphy_auto(struct mii_softc *);
114
115 static const struct mii_phy_funcs dcphy_funcs = {
116 dcphy_service,
117 dcphy_status,
118 dcphy_reset
119 };
120
121 static int
dcphy_probe(device_t dev)122 dcphy_probe(device_t dev)
123 {
124 struct mii_attach_args *ma;
125
126 ma = device_get_ivars(dev);
127
128 /*
129 * The dc driver will report the 21143 vendor and device
130 * ID to let us know that it wants us to attach.
131 */
132 if (ma->mii_id1 != DC_VENDORID_DEC ||
133 ma->mii_id2 != DC_DEVICEID_21143)
134 return (ENXIO);
135
136 device_set_desc(dev, "Intel 21143 NWAY media interface");
137
138 return (BUS_PROBE_DEFAULT);
139 }
140
141 static int
dcphy_attach(device_t dev)142 dcphy_attach(device_t dev)
143 {
144 struct mii_softc *sc;
145 struct dc_softc *dc_sc;
146 device_t brdev;
147
148 sc = device_get_softc(dev);
149
150 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
151 &dcphy_funcs, 0);
152
153 /*PHY_RESET(sc);*/
154 dc_sc = if_getsoftc(sc->mii_pdata->mii_ifp);
155 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
156 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
157
158 brdev = device_get_parent(sc->mii_dev);
159 switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) {
160 case COMPAQ_PRESARIO_ID:
161 /* Example of how to only allow 10Mbps modes. */
162 sc->mii_capabilities = BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX;
163 break;
164 default:
165 if (dc_sc->dc_pmode == DC_PMODE_SIA)
166 sc->mii_capabilities =
167 BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX;
168 else
169 sc->mii_capabilities =
170 BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX |
171 BMSR_10TFDX | BMSR_10THDX;
172 break;
173 }
174
175 sc->mii_capabilities &= sc->mii_capmask;
176 device_printf(dev, " ");
177 mii_phy_add_media(sc);
178 printf("\n");
179
180 MIIBUS_MEDIAINIT(sc->mii_dev);
181 return (0);
182 }
183
184 static int
dcphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)185 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
186 {
187 struct dc_softc *dc_sc;
188 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
189 int reg;
190 u_int32_t mode;
191
192 dc_sc = if_getsoftc(mii->mii_ifp);
193
194 switch (cmd) {
195 case MII_POLLSTAT:
196 break;
197
198 case MII_MEDIACHG:
199 /*
200 * If the interface is not up, don't do anything.
201 */
202 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
203 break;
204
205 mii->mii_media_active = IFM_NONE;
206 mode = CSR_READ_4(dc_sc, DC_NETCFG);
207 mode &= ~(DC_NETCFG_FULLDUPLEX | DC_NETCFG_PORTSEL |
208 DC_NETCFG_PCS | DC_NETCFG_SCRAMBLER | DC_NETCFG_SPEEDSEL);
209
210 switch (IFM_SUBTYPE(ife->ifm_media)) {
211 case IFM_AUTO:
212 /*PHY_RESET(sc);*/
213 (void)dcphy_auto(sc);
214 break;
215 case IFM_100_TX:
216 PHY_RESET(sc);
217 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
218 mode |= DC_NETCFG_PORTSEL | DC_NETCFG_PCS |
219 DC_NETCFG_SCRAMBLER;
220 if ((ife->ifm_media & IFM_FDX) != 0)
221 mode |= DC_NETCFG_FULLDUPLEX;
222 else
223 mode &= ~DC_NETCFG_FULLDUPLEX;
224 CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
225 break;
226 case IFM_10_T:
227 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
228 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF);
229 if ((ife->ifm_media & IFM_FDX) != 0)
230 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D);
231 else
232 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F);
233 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
234 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
235 mode &= ~DC_NETCFG_PORTSEL;
236 mode |= DC_NETCFG_SPEEDSEL;
237 if ((ife->ifm_media & IFM_FDX) != 0)
238 mode |= DC_NETCFG_FULLDUPLEX;
239 else
240 mode &= ~DC_NETCFG_FULLDUPLEX;
241 CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
242 break;
243 default:
244 return (EINVAL);
245 }
246 break;
247
248 case MII_TICK:
249 /*
250 * Is the interface even up?
251 */
252 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
253 return (0);
254
255 /*
256 * Only used for autonegotiation.
257 */
258 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
259 break;
260
261 reg = CSR_READ_4(dc_sc, DC_10BTSTAT);
262 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
263 break;
264
265 /*
266 * Only retry autonegotiation every 5 seconds.
267 *
268 * Otherwise, fall through to calling dcphy_status()
269 * since real Intel 21143 chips don't show valid link
270 * status until autonegotiation is switched off, and
271 * that only happens in dcphy_status(). Without this,
272 * successful autonegotiation is never recognised on
273 * these chips.
274 */
275 if (++sc->mii_ticks <= 50)
276 break;
277
278 sc->mii_ticks = 0;
279 dcphy_auto(sc);
280
281 break;
282 }
283
284 /* Update the media status. */
285 PHY_STATUS(sc);
286
287 /* Callback if something changed. */
288 mii_phy_update(sc, cmd);
289 return (0);
290 }
291
292 static void
dcphy_status(struct mii_softc * sc)293 dcphy_status(struct mii_softc *sc)
294 {
295 struct mii_data *mii = sc->mii_pdata;
296 int anlpar, tstat;
297 struct dc_softc *dc_sc;
298
299 dc_sc = if_getsoftc(mii->mii_ifp);
300
301 mii->mii_media_status = IFM_AVALID;
302 mii->mii_media_active = IFM_ETHER;
303
304 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
305 return;
306
307 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT);
308 if (!(tstat & DC_TSTAT_LS10) || !(tstat & DC_TSTAT_LS100))
309 mii->mii_media_status |= IFM_ACTIVE;
310
311 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) {
312 /* Erg, still trying, I guess... */
313 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) {
314 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) &&
315 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE)
316 goto skip;
317 mii->mii_media_active |= IFM_NONE;
318 return;
319 }
320
321 if (tstat & DC_TSTAT_LP_CAN_NWAY) {
322 anlpar = tstat >> 16;
323 if (anlpar & ANLPAR_TX_FD &&
324 sc->mii_capabilities & BMSR_100TXFDX)
325 mii->mii_media_active |= IFM_100_TX | IFM_FDX;
326 else if (anlpar & ANLPAR_T4 &&
327 sc->mii_capabilities & BMSR_100T4)
328 mii->mii_media_active |= IFM_100_T4 | IFM_HDX;
329 else if (anlpar & ANLPAR_TX &&
330 sc->mii_capabilities & BMSR_100TXHDX)
331 mii->mii_media_active |= IFM_100_TX | IFM_HDX;
332 else if (anlpar & ANLPAR_10_FD)
333 mii->mii_media_active |= IFM_10_T | IFM_FDX;
334 else if (anlpar & ANLPAR_10)
335 mii->mii_media_active |= IFM_10_T | IFM_HDX;
336 else
337 mii->mii_media_active |= IFM_NONE;
338 if (DC_IS_INTEL(dc_sc))
339 DC_CLRBIT(dc_sc, DC_10BTCTRL,
340 DC_TCTL_AUTONEGENBL);
341 return;
342 }
343
344 /*
345 * If the other side doesn't support NWAY, then the
346 * best we can do is determine if we have a 10Mbps or
347 * 100Mbps link. There's no way to know if the link
348 * is full or half duplex, so we default to half duplex
349 * and hope that the user is clever enough to manually
350 * change the media settings if we're wrong.
351 */
352 if (!(tstat & DC_TSTAT_LS100))
353 mii->mii_media_active |= IFM_100_TX | IFM_HDX;
354 else if (!(tstat & DC_TSTAT_LS10))
355 mii->mii_media_active |= IFM_10_T | IFM_HDX;
356 else
357 mii->mii_media_active |= IFM_NONE;
358 if (DC_IS_INTEL(dc_sc))
359 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
360 return;
361 }
362
363 skip:
364 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
365 mii->mii_media_active |= IFM_10_T;
366 else
367 mii->mii_media_active |= IFM_100_TX;
368 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
369 mii->mii_media_active |= IFM_FDX;
370 else
371 mii->mii_media_active |= IFM_HDX;
372 }
373
374 static int
dcphy_auto(struct mii_softc * mii)375 dcphy_auto(struct mii_softc *mii)
376 {
377 struct dc_softc *sc;
378
379 sc = if_getsoftc(mii->mii_pdata->mii_ifp);
380
381 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
382 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
383 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
384 if (mii->mii_capabilities & BMSR_100TXHDX)
385 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF);
386 else
387 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF);
388 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
389 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
390 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE);
391
392 return (EJUSTRETURN);
393 }
394
395 static void
dcphy_reset(struct mii_softc * mii)396 dcphy_reset(struct mii_softc *mii)
397 {
398 struct dc_softc *sc;
399
400 sc = if_getsoftc(mii->mii_pdata->mii_ifp);
401
402 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
403 DELAY(1000);
404 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
405 }
406