xref: /dragonfly/sys/dev/netif/mii_layer/dcphy.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/dcphy.c,v 1.2.2.2 2000/10/14 00:44:40 wpaul Exp $
33  */
34 
35 /*
36  * Pseudo-driver for internal NWAY support on DEC 21143 and workalike
37  * controllers. Technically we're abusing the miibus code to handle
38  * media selection and NWAY support here since there is no MII
39  * interface. However the logical operations are roughly the same,
40  * and the alternative is to create a fake MII interface in the driver,
41  * which is harder to do.
42  */
43 
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/socket.h>
48 #include <sys/errno.h>
49 #include <sys/module.h>
50 #include <sys/bus.h>
51 
52 #include <net/if.h>
53 #include <net/if_arp.h>
54 #include <net/if_media.h>
55 #include <net/if_poll.h>
56 
57 #include "mii.h"
58 #include "miivar.h"
59 #include "miidevs.h"
60 
61 #include <bus/pci/pcivar.h>
62 #include "../dc/if_dcreg.h"
63 
64 #include "miibus_if.h"
65 
66 #define DC_SETBIT(sc, reg, x)                           \
67         CSR_WRITE_4(sc, reg,                            \
68                 CSR_READ_4(sc, reg) | x)
69 
70 #define DC_CLRBIT(sc, reg, x)                           \
71         CSR_WRITE_4(sc, reg,                            \
72                 CSR_READ_4(sc, reg) & ~x)
73 
74 #define MIIF_AUTOTIMEOUT	0x0004
75 
76 /*
77  * This is the subsystem ID for the built-in 21143 ethernet
78  * in several Compaq Presario systems. Apparently these are
79  * 10Mbps only, so we need to treat them specially.
80  */
81 #define COMPAQ_PRESARIO_ID	0xb0bb0e11
82 
83 static int dcphy_probe		(device_t);
84 static int dcphy_attach		(device_t);
85 
86 static device_method_t dcphy_methods[] = {
87 	/* device interface */
88 	DEVMETHOD(device_probe,		dcphy_probe),
89 	DEVMETHOD(device_attach,	dcphy_attach),
90 	DEVMETHOD(device_detach,	ukphy_detach),
91 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
92 	DEVMETHOD_END
93 };
94 
95 static devclass_t dcphy_devclass;
96 
97 static driver_t dcphy_driver = {
98 	"dcphy",
99 	dcphy_methods,
100 	sizeof(struct mii_softc)
101 };
102 
103 DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, NULL, NULL);
104 
105 static int	dcphy_service(struct mii_softc *, struct mii_data *, int);
106 static void	dcphy_status(struct mii_softc *);
107 static void	dcphy_auto(struct mii_softc *);
108 static void	dcphy_reset(struct mii_softc *);
109 
110 static int
dcphy_probe(device_t dev)111 dcphy_probe(device_t dev)
112 {
113 	struct mii_attach_args *ma;
114 
115 	ma = device_get_ivars(dev);
116 
117 	/*
118 	 * The dc driver will report the 21143 vendor and device
119 	 * ID to let us know that it wants us to attach.
120 	 */
121 	if (ma->mii_id1 != DC_VENDORID_DEC ||
122 	    ma->mii_id2 != DC_DEVICEID_21143)
123 		return(ENXIO);
124 
125 	device_set_desc(dev, "Intel 21143 NWAY media interface");
126 
127 	return (0);
128 }
129 
130 static int
dcphy_attach(device_t dev)131 dcphy_attach(device_t dev)
132 {
133 	struct mii_softc *sc;
134 	struct mii_attach_args *ma;
135 	struct mii_data *mii;
136 	struct dc_softc		*dc_sc;
137 
138 	sc = device_get_softc(dev);
139 	ma = device_get_ivars(dev);
140 	mii_softc_init(sc, ma);
141 	sc->mii_dev = device_get_parent(dev);
142 	mii = device_get_softc(sc->mii_dev);
143 	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
144 
145 	sc->mii_inst = mii->mii_instance;
146 	sc->mii_service = dcphy_service;
147 	sc->mii_reset = dcphy_reset;
148 	sc->mii_anegticks = 50;
149 	sc->mii_pdata = mii;
150 
151 	sc->mii_flags |= MIIF_NOISOLATE;
152 	mii->mii_instance++;
153 
154 	/*dcphy_reset(sc);*/
155 	dc_sc = mii->mii_ifp->if_softc;
156 	CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
157 	CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
158 
159 	switch(pci_read_config(device_get_parent(sc->mii_dev),
160 	    DC_PCI_CSID, 4)) {
161 	case COMPAQ_PRESARIO_ID:
162 		/* Example of how to only allow 10Mbps modes. */
163 		sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX;
164 		break;
165 	default:
166 		if (dc_sc->dc_pmode == DC_PMODE_SIA) {
167 			sc->mii_capabilities =
168 			    BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX;
169 		} else {
170 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
171 
172 			ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
173 			    sc->mii_inst), MII_MEDIA_100_TX);
174 
175 #undef ADD
176 
177 			sc->mii_capabilities =
178 			    BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX|
179 			    BMSR_10TFDX|BMSR_10THDX;
180 		}
181 		break;
182 	}
183 
184 #ifdef notyet
185 	if (dc_sc->dc_type == DC_TYPE_21145)
186 		sc->mii_capabilities = BMSR_10THDX;
187 #endif
188 
189 	sc->mii_capabilities &= ma->mii_capmask;
190 	device_printf(dev, " ");
191 	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
192 		kprintf("no media present");
193 	else
194 		mii_phy_add_media(sc);
195 	kprintf("\n");
196 
197 	MIIBUS_MEDIAINIT(sc->mii_dev);
198 	return(0);
199 }
200 
201 static int
dcphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)202 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
203 {
204 	struct dc_softc		*dc_sc;
205 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
206 	int reg;
207 	u_int32_t		mode;
208 
209 	dc_sc = mii->mii_ifp->if_softc;
210 
211 	switch (cmd) {
212 	case MII_POLLSTAT:
213 		/*
214 		 * If we're not polling our PHY instance, just return.
215 		 */
216 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
217 			return (0);
218 		}
219 		break;
220 
221 	case MII_MEDIACHG:
222 		/*
223 		 * If the media indicates a different PHY instance,
224 		 * isolate ourselves. XXX how?
225 		 */
226 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
227 			return (0);
228 		}
229 
230 		/*
231 		 * If the interface is not up, don't do anything.
232 		 */
233 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
234 			break;
235 
236 		sc->mii_flags = 0;
237 		mii->mii_media_active = IFM_NONE;
238 		mode = CSR_READ_4(dc_sc, DC_NETCFG);
239 		mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL|
240 		    DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL);
241 
242 		switch (IFM_SUBTYPE(ife->ifm_media)) {
243 		case IFM_AUTO:
244 			/*dcphy_reset(sc);*/
245 			dcphy_auto(sc);
246 			break;
247 		case IFM_100_T4:
248 			/*
249 			 * XXX Not supported as a manual setting right now.
250 			 */
251 			return (EINVAL);
252 		case IFM_100_TX:
253 			dcphy_reset(sc);
254 			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
255 			mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS|
256 			    DC_NETCFG_SCRAMBLER;
257 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
258 				mode |= DC_NETCFG_FULLDUPLEX;
259 			else
260 				mode &= ~DC_NETCFG_FULLDUPLEX;
261 			CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
262 			break;
263 		case IFM_10_T:
264 			DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
265 			DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF);
266 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
267 				DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D);
268 			else
269 				DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F);
270 			DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
271 			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
272 			mode &= ~DC_NETCFG_PORTSEL;
273 			mode |= DC_NETCFG_SPEEDSEL;
274 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
275 				mode |= DC_NETCFG_FULLDUPLEX;
276 			else
277 				mode &= ~DC_NETCFG_FULLDUPLEX;
278 			CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
279 			break;
280 		default:
281 			return(EINVAL);
282 		}
283 		break;
284 
285 	case MII_TICK:
286 		/*
287 		 * If we're not currently selected, just return.
288 		 */
289 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
290 			return (0);
291 
292 		/*
293 		 * Is the interface even up?
294 		 */
295 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
296 			return (0);
297 
298 		/*
299 		 * Only used for autonegotiation.
300 		 */
301 		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
302 			break;
303 
304 		reg = CSR_READ_4(dc_sc, DC_10BTSTAT);
305 		if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
306 			return(0);
307 
308                 /*
309                  * Only retry autonegotiation every mii_anegticks seconds.
310 		 *
311 		 * Otherwise, fall through to calling dcphy_status()
312 		 * since real Intel 21143 chips don't show valid link
313 		 * status until autonegotiation is switched off, and
314 		 * that only happens in dcphy_status().  Without this,
315 		 * successful autonegotation is never recognised on
316 		 * these chips.
317                  */
318                 if (++sc->mii_ticks <= sc->mii_anegticks)
319 			break;
320 
321 		sc->mii_ticks = 0;
322 		dcphy_auto(sc);
323 
324 		break;
325 	}
326 
327 	/* Update the media status. */
328 	dcphy_status(sc);
329 
330 	/* Callback if something changed. */
331 	mii_phy_update(sc, cmd);
332 	return (0);
333 }
334 
335 static void
dcphy_status(struct mii_softc * sc)336 dcphy_status(struct mii_softc *sc)
337 {
338 	struct mii_data *mii = sc->mii_pdata;
339 	int reg, anlpar, tstat = 0;
340 	struct dc_softc		*dc_sc;
341 
342 	dc_sc = mii->mii_ifp->if_softc;
343 
344 	mii->mii_media_status = IFM_AVALID;
345 	mii->mii_media_active = IFM_ETHER;
346 
347 	if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
348 		return;
349 
350 	reg = CSR_READ_4(dc_sc, DC_10BTSTAT);
351 	if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
352 		mii->mii_media_status |= IFM_ACTIVE;
353 
354 	if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) {
355 		/* Erg, still trying, I guess... */
356 		tstat = CSR_READ_4(dc_sc, DC_10BTSTAT);
357 		if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) {
358 			if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) &&
359 			    (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE)
360 				goto skip;
361 			mii->mii_media_active |= IFM_NONE;
362 			return;
363 		}
364 
365 		if (tstat & DC_TSTAT_LP_CAN_NWAY) {
366 			anlpar = tstat >> 16;
367 			if (anlpar & ANLPAR_T4 &&
368 			    sc->mii_capabilities & BMSR_100TXHDX)
369 				mii->mii_media_active |= IFM_100_T4;
370 			else if (anlpar & ANLPAR_TX_FD &&
371 			    sc->mii_capabilities & BMSR_100TXFDX)
372 				mii->mii_media_active |= IFM_100_TX|IFM_FDX;
373 			else if (anlpar & ANLPAR_TX &&
374 			    sc->mii_capabilities & BMSR_100TXHDX)
375 				mii->mii_media_active |= IFM_100_TX;
376 			else if (anlpar & ANLPAR_10_FD)
377 				mii->mii_media_active |= IFM_10_T|IFM_FDX;
378 			else if (anlpar & ANLPAR_10)
379 				mii->mii_media_active |= IFM_10_T;
380 			else
381 				mii->mii_media_active |= IFM_NONE;
382 			if (DC_IS_INTEL(dc_sc))
383 				DC_CLRBIT(dc_sc, DC_10BTCTRL,
384 				    DC_TCTL_AUTONEGENBL);
385 			return;
386 		}
387 		/*
388 		 * If the other side doesn't support NWAY, then the
389 		 * best we can do is determine if we have a 10Mbps or
390 		 * 100Mbps link. There's no way to know if the link
391 		 * is full or half duplex, so we default to half duplex
392 		 * and hope that the user is clever enough to manually
393 		 * change the media settings if we're wrong.
394 		 */
395 		if (!(reg & DC_TSTAT_LS100))
396 			mii->mii_media_active |= IFM_100_TX;
397 		else if (!(reg & DC_TSTAT_LS10))
398 			mii->mii_media_active |= IFM_10_T;
399 		else
400 			mii->mii_media_active |= IFM_NONE;
401 		if (DC_IS_INTEL(dc_sc))
402 			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
403 		return;
404 	}
405 
406 skip:
407 
408 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
409 		mii->mii_media_active |= IFM_10_T;
410 	else
411 		mii->mii_media_active |= IFM_100_TX;
412 	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
413 		mii->mii_media_active |= IFM_FDX;
414 
415 	return;
416 }
417 
418 static void
dcphy_auto(struct mii_softc * sc)419 dcphy_auto(struct mii_softc *sc)
420 {
421 	struct dc_softc *dc_sc = sc->mii_pdata->mii_ifp->if_softc;
422 
423 	DC_CLRBIT(dc_sc, DC_NETCFG, DC_NETCFG_PORTSEL);
424 	DC_SETBIT(dc_sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
425 	DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
426 	if (sc->mii_capabilities & BMSR_100TXHDX)
427 		CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0x3FFFF);
428 	else
429 		CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0xFFFF);
430 	DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
431 	DC_SETBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
432 	DC_SETBIT(dc_sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE);
433 }
434 
435 static void
dcphy_reset(struct mii_softc * sc)436 dcphy_reset(struct mii_softc *sc)
437 {
438 	struct dc_softc *dc_sc = sc->mii_pdata->mii_ifp->if_softc;
439 
440 	DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
441 	DELAY(1000);
442 	DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
443 }
444