1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* Copyright (C) 2015 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "bcm-phy-lib.h"
#include <linux/brcmphy.h>
#include <linux/export.h>
#include <linux/mdio.h>
#include <linux/module.h>
#include <linux/phy.h>
#define MII_BCM_CHANNEL_WIDTH 0x2000
#define BCM_CL45VEN_EEE_ADV 0x3c
int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
{
int rc;
rc = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
if (rc < 0)
return rc;
return phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
}
EXPORT_SYMBOL_GPL(bcm_phy_write_exp);
int bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
{
int val;
val = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
if (val < 0)
return val;
val = phy_read(phydev, MII_BCM54XX_EXP_DATA);
/* Restore default value. It's O.K. if this write fails. */
phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
return val;
}
EXPORT_SYMBOL_GPL(bcm_phy_read_exp);
int bcm_phy_write_misc(struct phy_device *phydev,
u16 reg, u16 chl, u16 val)
{
int rc;
int tmp;
rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
if (rc < 0)
return rc;
tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
if (rc < 0)
return rc;
tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
rc = bcm_phy_write_exp(phydev, tmp, val);
return rc;
}
EXPORT_SYMBOL_GPL(bcm_phy_write_misc);
int bcm_phy_read_misc(struct phy_device *phydev,
u16 reg, u16 chl)
{
int rc;
int tmp;
rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
if (rc < 0)
return rc;
tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
if (rc < 0)
return rc;
tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
rc = bcm_phy_read_exp(phydev, tmp);
return rc;
}
EXPORT_SYMBOL_GPL(bcm_phy_read_misc);
int bcm_phy_ack_intr(struct phy_device *phydev)
{
int reg;
/* Clear pending interrupts. */
reg = phy_read(phydev, MII_BCM54XX_ISR);
if (reg < 0)
return reg;
return 0;
}
EXPORT_SYMBOL_GPL(bcm_phy_ack_intr);
int bcm_phy_config_intr(struct phy_device *phydev)
{
int reg;
reg = phy_read(phydev, MII_BCM54XX_ECR);
if (reg < 0)
return reg;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
reg &= ~MII_BCM54XX_ECR_IM;
else
reg |= MII_BCM54XX_ECR_IM;
return phy_write(phydev, MII_BCM54XX_ECR, reg);
}
EXPORT_SYMBOL_GPL(bcm_phy_config_intr);
int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow)
{
phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow));
return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD));
}
EXPORT_SYMBOL_GPL(bcm_phy_read_shadow);
int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow,
u16 val)
{
return phy_write(phydev, MII_BCM54XX_SHD,
MII_BCM54XX_SHD_WRITE |
MII_BCM54XX_SHD_VAL(shadow) |
MII_BCM54XX_SHD_DATA(val));
}
EXPORT_SYMBOL_GPL(bcm_phy_write_shadow);
int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down)
{
int val;
if (dll_pwr_down) {
val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3);
if (val < 0)
return val;
val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val);
}
val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_APD);
if (val < 0)
return val;
/* Clear APD bits */
val &= BCM_APD_CLR_MASK;
if (phydev->autoneg == AUTONEG_ENABLE)
val |= BCM54XX_SHD_APD_EN;
else
val |= BCM_NO_ANEG_APD_EN;
/* Enable energy detect single link pulse for easy wakeup */
val |= BCM_APD_SINGLELP_EN;
/* Enable Auto Power-Down (APD) for the PHY */
return bcm_phy_write_shadow(phydev, BCM54XX_SHD_APD, val);
}
EXPORT_SYMBOL_GPL(bcm_phy_enable_apd);
int bcm_phy_enable_eee(struct phy_device *phydev)
{
int val;
/* Enable EEE at PHY level */
val = phy_read_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL,
MDIO_MMD_AN);
if (val < 0)
return val;
val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X;
phy_write_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL,
MDIO_MMD_AN, (u32)val);
/* Advertise EEE */
val = phy_read_mmd_indirect(phydev, BCM_CL45VEN_EEE_ADV,
MDIO_MMD_AN);
if (val < 0)
return val;
val |= (MDIO_AN_EEE_ADV_100TX | MDIO_AN_EEE_ADV_1000T);
phy_write_mmd_indirect(phydev, BCM_CL45VEN_EEE_ADV,
MDIO_MMD_AN, (u32)val);
return 0;
}
EXPORT_SYMBOL_GPL(bcm_phy_enable_eee);
MODULE_DESCRIPTION("Broadcom PHY Library");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Broadcom Corporation");
|
