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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Marvell 88E6xxx Switch Global 2 Registers support
*
* Copyright (c) 2008 Marvell Semiconductor
*
* Copyright (c) 2016-2017 Savoir-faire Linux Inc.
* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
*
* Copyright (c) 2017 National Instruments
* Brandon Streiff <brandon.streiff@ni.com>
*/
#include <linux/bitfield.h>
#include "global2.h"
/* Offset 0x16: AVB Command Register
* Offset 0x17: AVB Data Register
*
* There are two different versions of this register interface:
* "6352": 3-bit "op" field, 4-bit "port" field.
* "6390": 2-bit "op" field, 5-bit "port" field.
*
* The "op" codes are different between the two, as well as the special
* port fields for global PTP and TAI configuration.
*/
/* mv88e6xxx_g2_avb_read -- Read one or multiple 16-bit words.
* The hardware supports snapshotting up to four contiguous registers.
*/
static int mv88e6xxx_g2_avb_wait(struct mv88e6xxx_chip *chip)
{
int bit = __bf_shf(MV88E6352_G2_AVB_CMD_BUSY);
return mv88e6xxx_g2_wait_bit(chip, MV88E6352_G2_AVB_CMD, bit, 0);
}
static int mv88e6xxx_g2_avb_read(struct mv88e6xxx_chip *chip, u16 readop,
u16 *data, int len)
{
int err;
int i;
err = mv88e6xxx_g2_avb_wait(chip);
if (err)
return err;
/* Hardware can only snapshot four words. */
if (len > 4)
return -E2BIG;
err = mv88e6xxx_g2_write(chip, MV88E6352_G2_AVB_CMD,
MV88E6352_G2_AVB_CMD_BUSY | readop);
if (err)
return err;
err = mv88e6xxx_g2_avb_wait(chip);
if (err)
return err;
for (i = 0; i < len; ++i) {
err = mv88e6xxx_g2_read(chip, MV88E6352_G2_AVB_DATA,
&data[i]);
if (err)
return err;
}
return 0;
}
/* mv88e6xxx_g2_avb_write -- Write one 16-bit word. */
static int mv88e6xxx_g2_avb_write(struct mv88e6xxx_chip *chip, u16 writeop,
u16 data)
{
int err;
err = mv88e6xxx_g2_avb_wait(chip);
if (err)
return err;
err = mv88e6xxx_g2_write(chip, MV88E6352_G2_AVB_DATA, data);
if (err)
return err;
err = mv88e6xxx_g2_write(chip, MV88E6352_G2_AVB_CMD,
MV88E6352_G2_AVB_CMD_BUSY | writeop);
return mv88e6xxx_g2_avb_wait(chip);
}
static int mv88e6352_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
int port, int addr, u16 *data,
int len)
{
u16 readop = (len == 1 ? MV88E6352_G2_AVB_CMD_OP_READ :
MV88E6352_G2_AVB_CMD_OP_READ_INCR) |
(port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
addr;
return mv88e6xxx_g2_avb_read(chip, readop, data, len);
}
static int mv88e6352_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
int port, int addr, u16 data)
{
u16 writeop = MV88E6352_G2_AVB_CMD_OP_WRITE | (port << 8) |
(MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
return mv88e6xxx_g2_avb_write(chip, writeop, data);
}
static int mv88e6352_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6352_g2_avb_port_ptp_read(chip,
MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data, len);
}
static int mv88e6352_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6352_g2_avb_port_ptp_write(chip,
MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data);
}
static int mv88e6352_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6352_g2_avb_port_ptp_read(chip,
MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data, len);
}
static int mv88e6352_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6352_g2_avb_port_ptp_write(chip,
MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data);
}
const struct mv88e6xxx_avb_ops mv88e6352_avb_ops = {
.port_ptp_read = mv88e6352_g2_avb_port_ptp_read,
.port_ptp_write = mv88e6352_g2_avb_port_ptp_write,
.ptp_read = mv88e6352_g2_avb_ptp_read,
.ptp_write = mv88e6352_g2_avb_ptp_write,
.tai_read = mv88e6352_g2_avb_tai_read,
.tai_write = mv88e6352_g2_avb_tai_write,
};
static int mv88e6165_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6352_g2_avb_port_ptp_read(chip,
MV88E6165_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data, len);
}
static int mv88e6165_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6352_g2_avb_port_ptp_write(chip,
MV88E6165_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data);
}
const struct mv88e6xxx_avb_ops mv88e6165_avb_ops = {
.port_ptp_read = mv88e6352_g2_avb_port_ptp_read,
.port_ptp_write = mv88e6352_g2_avb_port_ptp_write,
.ptp_read = mv88e6352_g2_avb_ptp_read,
.ptp_write = mv88e6352_g2_avb_ptp_write,
.tai_read = mv88e6165_g2_avb_tai_read,
.tai_write = mv88e6165_g2_avb_tai_write,
};
static int mv88e6390_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
int port, int addr, u16 *data,
int len)
{
u16 readop = (len == 1 ? MV88E6390_G2_AVB_CMD_OP_READ :
MV88E6390_G2_AVB_CMD_OP_READ_INCR) |
(port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
addr;
return mv88e6xxx_g2_avb_read(chip, readop, data, len);
}
static int mv88e6390_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
int port, int addr, u16 data)
{
u16 writeop = MV88E6390_G2_AVB_CMD_OP_WRITE | (port << 8) |
(MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
return mv88e6xxx_g2_avb_write(chip, writeop, data);
}
static int mv88e6390_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6390_g2_avb_port_ptp_read(chip,
MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data, len);
}
static int mv88e6390_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6390_g2_avb_port_ptp_write(chip,
MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data);
}
static int mv88e6390_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6390_g2_avb_port_ptp_read(chip,
MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data, len);
}
static int mv88e6390_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6390_g2_avb_port_ptp_write(chip,
MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data);
}
const struct mv88e6xxx_avb_ops mv88e6390_avb_ops = {
.port_ptp_read = mv88e6390_g2_avb_port_ptp_read,
.port_ptp_write = mv88e6390_g2_avb_port_ptp_write,
.ptp_read = mv88e6390_g2_avb_ptp_read,
.ptp_write = mv88e6390_g2_avb_ptp_write,
.tai_read = mv88e6390_g2_avb_tai_read,
.tai_write = mv88e6390_g2_avb_tai_write,
};
|
