1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * MII overrides for Intel PHYs.
28 */
29
30 #include <sys/types.h>
31 #include <sys/ddi.h>
32 #include <sys/sunddi.h>
33 #include <sys/cmn_err.h>
34 #include <sys/note.h>
35 #include <sys/mii.h>
36 #include <sys/miiregs.h>
37 #include "miipriv.h"
38
39 #define MII_82555_SPCL_CONTROL MII_VENDOR(1)
40 #define I82555_AUTOPOL_DIS (1<<4)
41
42 /*
43 * The older 82555 code in iprb had a bunch of workarounds to deal
44 * with chip errata surrounding (I believe) autonegotiation problems
45 * with the 82555 and long cables.
46 *
47 * I can't find any evidence in current Linux, NetBSD, or FreeBSD
48 * sources for the same kinds of workarounds for this PHY, so I'm
49 * going to operate on the belief that these workarounds are simply
50 * not necessary. Without access to the errata for these parts, as
51 * well as parts that exhibit the problems, I can't be certain that
52 * such workarounds will work properly. So I'm leaving them out for
53 * now. I believe that the errata were mostly problems for 10 Mbps
54 * links which are very hard to find anymore, anyway.
55 */
56
57 static int
i82555_start(phy_handle_t * ph)58 i82555_start(phy_handle_t *ph)
59 {
60 int rv;
61
62 if ((rv = phy_start(ph)) != DDI_SUCCESS) {
63 return (rv);
64 }
65
66 /*
67 * Apparently some devices have problem with 10 Mbps polarity and
68 * short cable lengths. However, these days everyone should be using
69 * 100 Mbps, and rather than retain the extra legacy complexity
70 * here, I'm going to simply offer the choice to disable auto polarity.
71 *
72 * If autopolarity doesn't work for you, you have several choices:
73 *
74 * 1) Find a longer cable.
75 * 2) Upgrade to 100Mbps.
76 * 3) Disable the polarity check by setting AutoPolarity to 0.
77 *
78 * We also believe that 10BASE-T autopolarity may be harmful (because
79 * when used it can prevent use of a superior 100Mbps mode), so we
80 * disable autopolarity by default.
81 */
82 if (phy_get_prop(ph, "AutoPolarity", 0) == 0) {
83 /* disable autopolarity */
84 PHY_SET(ph, MII_82555_SPCL_CONTROL, I82555_AUTOPOL_DIS);
85 } else {
86 /* enable basic autopolarity */
87 PHY_CLR(ph, MII_82555_SPCL_CONTROL, I82555_AUTOPOL_DIS);
88 }
89
90 return (rv);
91 }
92
93 boolean_t
phy_intel_probe(phy_handle_t * ph)94 phy_intel_probe(phy_handle_t *ph)
95 {
96 const char *model;
97
98 if (MII_PHY_MFG(ph->phy_id) != MII_OUI_INTEL) {
99 return (B_FALSE);
100 }
101
102 switch (MII_PHY_MODEL(ph->phy_id)) {
103 case MII_MODEL_INTEL_82553_CSTEP:
104 model = "82553 C-step";
105 break;
106 case MII_MODEL_INTEL_82555:
107 ph->phy_start = i82555_start;
108 model = "82555";
109 break;
110 case MII_MODEL_INTEL_82562_EH:
111 model = "Intel 82562 EH";
112 break;
113 case MII_MODEL_INTEL_82562_ET:
114 model = "Intel 82562 ET";
115 break;
116 case MII_MODEL_INTEL_82562_EM:
117 model = "Intel 82562 EM";
118 break;
119 default:
120 return (B_FALSE);
121 }
122
123 ph->phy_vendor = "Intel";
124 ph->phy_model = model;
125
126 return (B_TRUE);
127 }
128