xref: /freebsd/sys/dev/mii/ip1000phy.c (revision a0b9e2e854027e6ff61fb075a1309dbc71c42b54)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2006, Pyun YongHyeon <yongari@FreeBSD.org>
5  * 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 unmodified, this list of conditions, and the following
12  *    disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  */
30 
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33 
34 /*
35  * Driver for the IC Plus IP1000A/IP1001 10/100/1000 PHY.
36  */
37 
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/socket.h>
43 #include <sys/taskqueue.h>
44 #include <sys/bus.h>
45 
46 #include <net/if.h>
47 #include <net/if_var.h>
48 #include <net/if_media.h>
49 
50 #include <dev/mii/mii.h>
51 #include <dev/mii/miivar.h>
52 #include "miidevs.h"
53 
54 #include <dev/mii/ip1000phyreg.h>
55 
56 #include "miibus_if.h"
57 
58 #include <machine/bus.h>
59 #include <dev/stge/if_stgereg.h>
60 
61 static int ip1000phy_probe(device_t);
62 static int ip1000phy_attach(device_t);
63 
64 static device_method_t ip1000phy_methods[] = {
65 	/* device interface */
66 	DEVMETHOD(device_probe,		ip1000phy_probe),
67 	DEVMETHOD(device_attach,	ip1000phy_attach),
68 	DEVMETHOD(device_detach,	mii_phy_detach),
69 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
70 	DEVMETHOD_END
71 };
72 
73 static devclass_t ip1000phy_devclass;
74 static driver_t ip1000phy_driver = {
75 	"ip1000phy",
76 	ip1000phy_methods,
77 	sizeof(struct mii_softc)
78 };
79 
80 DRIVER_MODULE(ip1000phy, miibus, ip1000phy_driver, ip1000phy_devclass, 0, 0);
81 
82 static int	ip1000phy_service(struct mii_softc *, struct mii_data *, int);
83 static void	ip1000phy_status(struct mii_softc *);
84 static void	ip1000phy_reset(struct mii_softc *);
85 static int	ip1000phy_mii_phy_auto(struct mii_softc *, int);
86 
87 static const struct mii_phydesc ip1000phys[] = {
88 	MII_PHY_DESC(xxICPLUS, IP1000A),
89 	MII_PHY_DESC(xxICPLUS, IP1001),
90 	MII_PHY_END
91 };
92 
93 static const struct mii_phy_funcs ip1000phy_funcs = {
94 	ip1000phy_service,
95 	ip1000phy_status,
96 	ip1000phy_reset
97 };
98 
99 static int
100 ip1000phy_probe(device_t dev)
101 {
102 
103 	return (mii_phy_dev_probe(dev, ip1000phys, BUS_PROBE_DEFAULT));
104 }
105 
106 static int
107 ip1000phy_attach(device_t dev)
108 {
109 	struct mii_attach_args *ma;
110 	u_int flags;
111 
112 	ma = device_get_ivars(dev);
113 	flags = MIIF_NOISOLATE | MIIF_NOMANPAUSE;
114 	if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxICPLUS_IP1000A &&
115 	     mii_dev_mac_match(dev, "stge") &&
116 	     (miibus_get_flags(dev) & MIIF_MACPRIV0) != 0)
117 		flags |= MIIF_PHYPRIV0;
118 	mii_phy_dev_attach(dev, flags, &ip1000phy_funcs, 1);
119 	return (0);
120 }
121 
122 static int
123 ip1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
124 {
125 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
126 	uint32_t gig, reg, speed;
127 
128 	switch (cmd) {
129 	case MII_POLLSTAT:
130 		break;
131 
132 	case MII_MEDIACHG:
133 		PHY_RESET(sc);
134 		switch (IFM_SUBTYPE(ife->ifm_media)) {
135 		case IFM_AUTO:
136 			(void)ip1000phy_mii_phy_auto(sc, ife->ifm_media);
137 			goto done;
138 
139 		case IFM_1000_T:
140 			/*
141 			 * XXX
142 			 * Manual 1000baseT setting doesn't seem to work.
143 			 */
144 			speed = IP1000PHY_BMCR_1000;
145 			break;
146 
147 		case IFM_100_TX:
148 			speed = IP1000PHY_BMCR_100;
149 			break;
150 
151 		case IFM_10_T:
152 			speed = IP1000PHY_BMCR_10;
153 			break;
154 
155 		default:
156 			return (EINVAL);
157 		}
158 
159 		if ((ife->ifm_media & IFM_FDX) != 0) {
160 			speed |= IP1000PHY_BMCR_FDX;
161 			gig = IP1000PHY_1000CR_1000T_FDX;
162 		} else
163 			gig = IP1000PHY_1000CR_1000T;
164 
165 		if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
166 			gig |=
167 			    IP1000PHY_1000CR_MASTER | IP1000PHY_1000CR_MANUAL;
168 			if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
169 				gig |= IP1000PHY_1000CR_MMASTER;
170 		} else
171 			gig = 0;
172 		PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig);
173 		PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
174 
175 done:
176 		break;
177 
178 	case MII_TICK:
179 		/*
180 		 * Only used for autonegotiation.
181 		 */
182 		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
183 			sc->mii_ticks = 0;
184 			break;
185 		}
186 
187 		/*
188 		 * check for link.
189 		 */
190 		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
191 		if (reg & BMSR_LINK) {
192 			sc->mii_ticks = 0;
193 			break;
194 		}
195 
196 		/* Announce link loss right after it happens */
197 		if (sc->mii_ticks++ == 0)
198 			break;
199 
200 		/*
201 		 * Only retry autonegotiation every mii_anegticks seconds.
202 		 */
203 		if (sc->mii_ticks <= sc->mii_anegticks)
204 			break;
205 
206 		sc->mii_ticks = 0;
207 		ip1000phy_mii_phy_auto(sc, ife->ifm_media);
208 		break;
209 	}
210 
211 	/* Update the media status. */
212 	PHY_STATUS(sc);
213 
214 	/* Callback if something changed. */
215 	mii_phy_update(sc, cmd);
216 	return (0);
217 }
218 
219 static void
220 ip1000phy_status(struct mii_softc *sc)
221 {
222 	struct mii_data *mii = sc->mii_pdata;
223 	uint32_t bmsr, bmcr, stat;
224 
225 	mii->mii_media_status = IFM_AVALID;
226 	mii->mii_media_active = IFM_ETHER;
227 
228 	bmsr = PHY_READ(sc, IP1000PHY_MII_BMSR) |
229 	    PHY_READ(sc, IP1000PHY_MII_BMSR);
230 	if ((bmsr & IP1000PHY_BMSR_LINK) != 0)
231 		mii->mii_media_status |= IFM_ACTIVE;
232 
233 	bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
234 	if ((bmcr & IP1000PHY_BMCR_LOOP) != 0)
235 		mii->mii_media_active |= IFM_LOOP;
236 
237 	if ((bmcr & IP1000PHY_BMCR_AUTOEN) != 0) {
238 		if ((bmsr & IP1000PHY_BMSR_ANEGCOMP) == 0) {
239 			/* Erg, still trying, I guess... */
240 			mii->mii_media_active |= IFM_NONE;
241 			return;
242                 }
243         }
244 
245 	if (sc->mii_mpd_model == MII_MODEL_xxICPLUS_IP1001) {
246 		stat = PHY_READ(sc, IP1000PHY_LSR);
247 		switch (stat & IP1000PHY_LSR_SPEED_MASK) {
248 		case IP1000PHY_LSR_SPEED_10:
249 			mii->mii_media_active |= IFM_10_T;
250 			break;
251 		case IP1000PHY_LSR_SPEED_100:
252 			mii->mii_media_active |= IFM_100_TX;
253 			break;
254 		case IP1000PHY_LSR_SPEED_1000:
255 			mii->mii_media_active |= IFM_1000_T;
256 			break;
257 		default:
258 			mii->mii_media_active |= IFM_NONE;
259 			return;
260 		}
261 		if ((stat & IP1000PHY_LSR_FULL_DUPLEX) != 0)
262 			mii->mii_media_active |= IFM_FDX;
263 		else
264 			mii->mii_media_active |= IFM_HDX;
265 	} else {
266 		stat = PHY_READ(sc, STGE_PhyCtrl);
267 		switch (PC_LinkSpeed(stat)) {
268 		case PC_LinkSpeed_Down:
269 			mii->mii_media_active |= IFM_NONE;
270 			return;
271 		case PC_LinkSpeed_10:
272 			mii->mii_media_active |= IFM_10_T;
273 			break;
274 		case PC_LinkSpeed_100:
275 			mii->mii_media_active |= IFM_100_TX;
276 			break;
277 		case PC_LinkSpeed_1000:
278 			mii->mii_media_active |= IFM_1000_T;
279 			break;
280 		default:
281 			mii->mii_media_active |= IFM_NONE;
282 			return;
283 		}
284 		if ((stat & PC_PhyDuplexStatus) != 0)
285 			mii->mii_media_active |= IFM_FDX;
286 		else
287 			mii->mii_media_active |= IFM_HDX;
288 	}
289 
290 	if ((mii->mii_media_active & IFM_FDX) != 0)
291 		mii->mii_media_active |= mii_phy_flowstatus(sc);
292 
293 	if ((mii->mii_media_active & IFM_1000_T) != 0) {
294 		stat = PHY_READ(sc, IP1000PHY_MII_1000SR);
295 		if ((stat & IP1000PHY_1000SR_MASTER) != 0)
296 			mii->mii_media_active |= IFM_ETH_MASTER;
297 	}
298 }
299 
300 static int
301 ip1000phy_mii_phy_auto(struct mii_softc *sc, int media)
302 {
303 	uint32_t reg;
304 
305 	reg = 0;
306 	if (sc->mii_mpd_model == MII_MODEL_xxICPLUS_IP1001) {
307 		reg = PHY_READ(sc, IP1000PHY_MII_ANAR);
308 		reg &= ~(IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE);
309 		reg |= IP1000PHY_ANAR_NP;
310 	}
311 	reg |= IP1000PHY_ANAR_10T | IP1000PHY_ANAR_10T_FDX |
312 	    IP1000PHY_ANAR_100TX | IP1000PHY_ANAR_100TX_FDX;
313 	if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
314 		reg |= IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE;
315 	PHY_WRITE(sc, IP1000PHY_MII_ANAR, reg | IP1000PHY_ANAR_CSMA);
316 
317 	reg = IP1000PHY_1000CR_1000T | IP1000PHY_1000CR_1000T_FDX;
318 	if (sc->mii_mpd_model != MII_MODEL_xxICPLUS_IP1001)
319 		reg |= IP1000PHY_1000CR_MASTER;
320 	PHY_WRITE(sc, IP1000PHY_MII_1000CR, reg);
321 	PHY_WRITE(sc, IP1000PHY_MII_BMCR, (IP1000PHY_BMCR_FDX |
322 	    IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_STARTNEG));
323 
324 	return (EJUSTRETURN);
325 }
326 
327 static void
328 ip1000phy_load_dspcode(struct mii_softc *sc)
329 {
330 
331 	PHY_WRITE(sc, 31, 0x0001);
332 	PHY_WRITE(sc, 27, 0x01e0);
333 	PHY_WRITE(sc, 31, 0x0002);
334 	PHY_WRITE(sc, 27, 0xeb8e);
335 	PHY_WRITE(sc, 31, 0x0000);
336 	PHY_WRITE(sc, 30, 0x005e);
337 	PHY_WRITE(sc, 9, 0x0700);
338 
339 	DELAY(50);
340 }
341 
342 static void
343 ip1000phy_reset(struct mii_softc *sc)
344 {
345 	uint32_t reg;
346 
347 	mii_phy_reset(sc);
348 
349 	/* clear autoneg/full-duplex as we don't want it after reset */
350 	reg = PHY_READ(sc, IP1000PHY_MII_BMCR);
351 	reg &= ~(IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_FDX);
352 	PHY_WRITE(sc, MII_BMCR, reg);
353 
354 	if ((sc->mii_flags & MIIF_PHYPRIV0) != 0)
355 		ip1000phy_load_dspcode(sc);
356 }
357