mii_qualsemi.c revision 9860:20e31304c39b 
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 Quality Semiconductor PHYs.
28 */
29
30#include <sys/types.h>
31#include <sys/ddi.h>
32#include <sys/sunddi.h>
33#include <sys/mii.h>
34#include <sys/miiregs.h>
35#include "miipriv.h"
36
37#define	QS_IMASK_REG		30
38#define	QS_BTXPC		31
39#define	QS_BTXPC_SCRAM_DIS	0x1
40
41static int
42qs6612_reset(phy_handle_t *ph)
43{
44	/* Ordinary reset. */
45	if (phy_reset(ph) != DDI_SUCCESS) {
46		return (DDI_FAILURE);
47	}
48
49	/* Disable QS6612 proprietary interrupts. */
50	phy_write(ph, QS_IMASK_REG, 0);
51
52	return (DDI_SUCCESS);
53}
54
55static int
56qs6612_check(phy_handle_t *ph)
57{
58	link_state_t	link;
59	int		rv;
60
61	/*
62	 * Apparently some *ancient* Synoptics 28115 firwmare has a bug that
63	 * doesn't connect with certain devices.  While I'm fairly sure we
64	 * could probably remove this workaround (for another vendor's bug!)
65	 * at this point, it might crop up as a regression.
66	 *
67	 * Apparently, the workaround is to disable the scrambler for a bit
68	 * once 100 Mbps link is achieved, and then reactivate.  This lets
69	 * the busted switch work.  We only do it when first bringing up
70	 * the 100 Mbps link.
71	 *
72	 * Yes, I resent having to do this.  But the code is carried over
73	 * from old hme/qfe.  See 4071199 for details.
74	 */
75	link = ph->phy_link;
76
77	rv = phy_check(ph);
78
79	if ((ph->phy_link == LINK_STATE_UP) && (link != LINK_STATE_UP) &&
80	    (ph->phy_speed == 100)) {
81		uint16_t	val;
82		val = phy_read(ph, QS_BTXPC);
83		phy_write(ph, QS_BTXPC, val | QS_BTXPC_SCRAM_DIS);
84		drv_usecwait(20);
85		phy_write(ph, QS_BTXPC, val);
86	}
87
88	return (rv);
89}
90
91boolean_t
92phy_qualsemi_probe(phy_handle_t *ph)
93{
94	if ((MII_PHY_MFG(ph->phy_id) == MII_OUI_QUALITY_SEMI) &&
95	    (MII_PHY_MODEL(ph->phy_id) == MII_MODEL_QUALITY_SEMI_QS6612)) {
96		ph->phy_vendor = "Quality Semiconductor";
97		ph->phy_model = "QS6612";
98		ph->phy_reset = qs6612_reset;
99		ph->phy_check = qs6612_check;
100		return (B_TRUE);
101	}
102	return (B_FALSE);
103}
104