1 /* $NetBSD: ukphy_subr.c,v 1.17 2020/03/15 23:04:50 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center, and by Frank van der Linden.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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 THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Subroutines shared by the ukphy driver and other PHY drivers.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: ukphy_subr.c,v 1.17 2020/03/15 23:04:50 thorpej Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/device.h>
44 #include <sys/socket.h>
45
46 #include <net/if.h>
47 #include <net/if_media.h>
48
49 #include <dev/mii/mii.h>
50 #include <dev/mii/miivar.h>
51
52 /*
53 * Media status subroutine. If a PHY driver does media detection simply
54 * by decoding the NWay autonegotiation, use this routine.
55 */
56 void
ukphy_status(struct mii_softc * phy)57 ukphy_status(struct mii_softc *phy)
58 {
59 struct mii_data *mii = phy->mii_pdata;
60 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
61 uint16_t bmsr, bmcr, anar, anlpar, gtcr, gtsr, result;
62
63 KASSERT(mii_locked(mii));
64
65 mii->mii_media_status = IFM_AVALID;
66 mii->mii_media_active = IFM_ETHER;
67
68 PHY_READ(phy, MII_BMSR, &bmsr);
69 PHY_READ(phy, MII_BMSR, &bmsr);
70 if (bmsr & BMSR_LINK)
71 mii->mii_media_status |= IFM_ACTIVE;
72
73 PHY_READ(phy, MII_BMCR, &bmcr);
74 if (bmcr & BMCR_ISO) {
75 mii->mii_media_active |= IFM_NONE;
76 mii->mii_media_status = 0;
77 return;
78 }
79
80 if (bmcr & BMCR_LOOP)
81 mii->mii_media_active |= IFM_LOOP;
82
83 if (bmcr & BMCR_AUTOEN) {
84 /*
85 * NWay autonegotiation takes the highest-order common
86 * bit of the ANAR and ANLPAR (i.e. best media advertised
87 * both by us and our link partner).
88 */
89 if ((bmsr & BMSR_ACOMP) == 0) {
90 /* Erg, still trying, I guess... */
91 mii->mii_media_active |= IFM_NONE;
92 return;
93 }
94
95 PHY_READ(phy, MII_ANAR, &anar);
96 PHY_READ(phy, MII_ANLPAR, &anlpar);
97 result = anar & anlpar;
98 if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
99 (phy->mii_extcapabilities &
100 (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) {
101 PHY_READ(phy, MII_100T2CR, >cr);
102 PHY_READ(phy, MII_100T2SR, >sr);
103 } else
104 gtcr = gtsr = 0;
105
106 if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
107 mii->mii_media_active |= IFM_1000_T | IFM_FDX;
108 else if ((gtcr & GTCR_ADV_1000THDX) &&
109 (gtsr & GTSR_LP_1000THDX))
110 mii->mii_media_active |= IFM_1000_T | IFM_HDX;
111 else if (result & ANLPAR_TX_FD)
112 mii->mii_media_active |= IFM_100_TX | IFM_FDX;
113 else if (result & ANLPAR_T4)
114 mii->mii_media_active |= IFM_100_T4 | IFM_HDX;
115 else if (result & ANLPAR_TX)
116 mii->mii_media_active |= IFM_100_TX | IFM_HDX;
117 else if (result & ANLPAR_10_FD)
118 mii->mii_media_active |= IFM_10_T | IFM_FDX;
119 else if (result & ANLPAR_10)
120 mii->mii_media_active |= IFM_10_T | IFM_HDX;
121 else
122 mii->mii_media_active |= IFM_NONE;
123
124 if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
125 (gtsr & GTSR_MS_RES))
126 mii->mii_media_active |= IFM_ETH_MASTER;
127
128 if (mii->mii_media_active & IFM_FDX)
129 mii->mii_media_active |= mii_phy_flowstatus(phy);
130 } else
131 mii->mii_media_active = ife->ifm_media;
132 }
133