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__FBSDID("$FreeBSD: releng/12.0/sys/dev/dc/pnphy.c 325966 2017-11-18 14:26:50Z pfg $");
37
38/*
39 * Pseudo-driver for media selection on the Lite-On PNIC 82c168
40 * chip.  The NWAY support on this chip is horribly broken, so we
41 * only support manual mode selection.  This is lame, but getting
42 * NWAY to work right is amazingly difficult.
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/dc/if_dcreg.h>
68
69#include "miibus_if.h"
70
71static int pnphy_probe(device_t);
72static int pnphy_attach(device_t);
73
74static device_method_t pnphy_methods[] = {
75	/* device interface */
76	DEVMETHOD(device_probe,		pnphy_probe),
77	DEVMETHOD(device_attach,	pnphy_attach),
78	DEVMETHOD(device_detach,	mii_phy_detach),
79	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
80	DEVMETHOD_END
81};
82
83static devclass_t pnphy_devclass;
84
85static driver_t pnphy_driver = {
86	"pnphy",
87	pnphy_methods,
88	sizeof(struct mii_softc)
89};
90
91DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
92
93static int	pnphy_service(struct mii_softc *, struct mii_data *, int);
94static void	pnphy_status(struct mii_softc *);
95static void	pnphy_reset(struct mii_softc *);
96
97static const struct mii_phy_funcs pnphy_funcs = {
98	pnphy_service,
99	pnphy_status,
100	pnphy_reset
101};
102
103static int
104pnphy_probe(device_t dev)
105{
106	struct mii_attach_args *ma;
107
108	ma = device_get_ivars(dev);
109
110	/*
111	 * The dc driver will report the 82c168 vendor and device
112	 * ID to let us know that it wants us to attach.
113	 */
114	if (ma->mii_id1 != DC_VENDORID_LO ||
115	    ma->mii_id2 != DC_DEVICEID_82C168)
116		return (ENXIO);
117
118	device_set_desc(dev, "PNIC 82c168 media interface");
119
120	return (BUS_PROBE_DEFAULT);
121}
122
123static int
124pnphy_attach(device_t dev)
125{
126	struct mii_softc *sc;
127
128	sc = device_get_softc(dev);
129
130	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
131	    &pnphy_funcs, 0);
132
133	sc->mii_capabilities =
134	    BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
135	sc->mii_capabilities &= sc->mii_capmask;
136	device_printf(dev, " ");
137	mii_phy_add_media(sc);
138	printf("\n");
139
140	MIIBUS_MEDIAINIT(sc->mii_dev);
141	return (0);
142}
143
144static int
145pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
146{
147	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
148
149	switch (cmd) {
150	case MII_POLLSTAT:
151		break;
152
153	case MII_MEDIACHG:
154		/*
155		 * If the interface is not up, don't do anything.
156		 */
157		if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
158			break;
159
160		/*
161		 * Note that auto-negotiation is broken on this chip.
162		 */
163		switch (IFM_SUBTYPE(ife->ifm_media)) {
164		case IFM_100_TX:
165			mii->mii_media_active = IFM_ETHER | IFM_100_TX;
166			if ((ife->ifm_media & IFM_FDX) != 0)
167				mii->mii_media_active |= IFM_FDX;
168			MIIBUS_STATCHG(sc->mii_dev);
169			return (0);
170		case IFM_10_T:
171			mii->mii_media_active = IFM_ETHER | IFM_10_T;
172			if ((ife->ifm_media & IFM_FDX) != 0)
173				mii->mii_media_active |= IFM_FDX;
174			MIIBUS_STATCHG(sc->mii_dev);
175			return (0);
176		default:
177			return (EINVAL);
178		}
179		break;
180
181	case MII_TICK:
182		/*
183		 * Is the interface even up?
184		 */
185		if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
186			return (0);
187
188		break;
189	}
190
191	/* Update the media status. */
192	PHY_STATUS(sc);
193
194	/* Callback if something changed. */
195	mii_phy_update(sc, cmd);
196	return (0);
197}
198
199static void
200pnphy_status(struct mii_softc *sc)
201{
202	struct mii_data *mii = sc->mii_pdata;
203	int reg;
204	struct dc_softc		*dc_sc;
205
206	dc_sc = if_getsoftc(mii->mii_ifp);
207
208	mii->mii_media_status = IFM_AVALID;
209	mii->mii_media_active = IFM_ETHER;
210
211	reg = CSR_READ_4(dc_sc, DC_ISR);
212	if (!(reg & DC_ISR_LINKFAIL))
213		mii->mii_media_status |= IFM_ACTIVE;
214	reg = CSR_READ_4(dc_sc, DC_NETCFG);
215	if (reg & DC_NETCFG_SPEEDSEL)
216		mii->mii_media_active |= IFM_10_T;
217	else
218		mii->mii_media_active |= IFM_100_TX;
219	if (reg & DC_NETCFG_FULLDUPLEX)
220		mii->mii_media_active |= IFM_FDX;
221	else
222		mii->mii_media_active |= IFM_HDX;
223}
224
225static void
226pnphy_reset(struct mii_softc *sc __unused)
227{
228
229}
230