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Merge tag 'for-linus-4.18-ofs' of git://git.kernel.org/pub/scm/linux/kernel/git/hubca...
[linux-2.6-block.git] / drivers / net / dsa / mv88e6xxx / global2_avb.c
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0d632c3d
BS		 1/*
2 * Marvell 88E6xxx Switch Global 2 Registers support
3 *
4 * Copyright (c) 2008 Marvell Semiconductor
5 *
6 * Copyright (c) 2016-2017 Savoir-faire Linux Inc.
7 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
8 *
9 * Copyright (c) 2017 National Instruments
10 * Brandon Streiff <brandon.streiff@ni.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 */
17
18#include "global2.h"
19
20/* Offset 0x16: AVB Command Register
21 * Offset 0x17: AVB Data Register
22 *
23 * There are two different versions of this register interface:
24 * "6352": 3-bit "op" field, 4-bit "port" field.
25 * "6390": 2-bit "op" field, 5-bit "port" field.
26 *
27 * The "op" codes are different between the two, as well as the special
28 * port fields for global PTP and TAI configuration.
29 */
30
31/* mv88e6xxx_g2_avb_read -- Read one or multiple 16-bit words.
32 * The hardware supports snapshotting up to four contiguous registers.
33 */
34static int mv88e6xxx_g2_avb_read(struct mv88e6xxx_chip *chip, u16 readop,
35 u16 *data, int len)
36{
37 int err;
38 int i;
39
40 /* Hardware can only snapshot four words. */
41 if (len > 4)
42 return -E2BIG;
43
44 err = mv88e6xxx_g2_update(chip, MV88E6352_G2_AVB_CMD, readop);
45 if (err)
46 return err;
47
48 for (i = 0; i < len; ++i) {
49 err = mv88e6xxx_g2_read(chip, MV88E6352_G2_AVB_DATA,
50 &data[i]);
51 if (err)
52 return err;
53 }
54
55 return 0;
56}
57
58/* mv88e6xxx_g2_avb_write -- Write one 16-bit word. */
59static int mv88e6xxx_g2_avb_write(struct mv88e6xxx_chip *chip, u16 writeop,
60 u16 data)
61{
62 int err;
63
64 err = mv88e6xxx_g2_write(chip, MV88E6352_G2_AVB_DATA, data);
65 if (err)
66 return err;
67
68 return mv88e6xxx_g2_update(chip, MV88E6352_G2_AVB_CMD, writeop);
69}
70
71static int mv88e6352_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
72 int port, int addr, u16 *data,
73 int len)
74{
75 u16 readop = (len == 1 ? MV88E6352_G2_AVB_CMD_OP_READ :
76 MV88E6352_G2_AVB_CMD_OP_READ_INCR) |
77 (port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
78 addr;
79
80 return mv88e6xxx_g2_avb_read(chip, readop, data, len);
81}
82
83static int mv88e6352_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
84 int port, int addr, u16 data)
85{
86 u16 writeop = MV88E6352_G2_AVB_CMD_OP_WRITE | (port << 8) |
87 (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
88
89 return mv88e6xxx_g2_avb_write(chip, writeop, data);
90}
91
92static int mv88e6352_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
93 u16 *data, int len)
94{
95 return mv88e6352_g2_avb_port_ptp_read(chip,
96 MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
97 addr, data, len);
98}
99
100static int mv88e6352_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
101 u16 data)
102{
103 return mv88e6352_g2_avb_port_ptp_write(chip,
104 MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
105 addr, data);
106}
107
108static int mv88e6352_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
109 u16 *data, int len)
110{
111 return mv88e6352_g2_avb_port_ptp_read(chip,
112 MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
113 addr, data, len);
114}
115
116static int mv88e6352_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
117 u16 data)
118{
119 return mv88e6352_g2_avb_port_ptp_write(chip,
120 MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
121 addr, data);
122}
123
124const struct mv88e6xxx_avb_ops mv88e6352_avb_ops = {
125 .port_ptp_read = mv88e6352_g2_avb_port_ptp_read,
126 .port_ptp_write = mv88e6352_g2_avb_port_ptp_write,
127 .ptp_read = mv88e6352_g2_avb_ptp_read,
128 .ptp_write = mv88e6352_g2_avb_ptp_write,
129 .tai_read = mv88e6352_g2_avb_tai_read,
130 .tai_write = mv88e6352_g2_avb_tai_write,
131};
132
133static int mv88e6390_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
134 int port, int addr, u16 *data,
135 int len)
136{
137 u16 readop = (len == 1 ? MV88E6390_G2_AVB_CMD_OP_READ :
138 MV88E6390_G2_AVB_CMD_OP_READ_INCR) |
139 (port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
140 addr;
141
142 return mv88e6xxx_g2_avb_read(chip, readop, data, len);
143}
144
145static int mv88e6390_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
146 int port, int addr, u16 data)
147{
148 u16 writeop = MV88E6390_G2_AVB_CMD_OP_WRITE | (port << 8) |
149 (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
150
151 return mv88e6xxx_g2_avb_write(chip, writeop, data);
152}
153
154static int mv88e6390_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
155 u16 *data, int len)
156{
157 return mv88e6390_g2_avb_port_ptp_read(chip,
158 MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
159 addr, data, len);
160}
161
162static int mv88e6390_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
163 u16 data)
164{
165 return mv88e6390_g2_avb_port_ptp_write(chip,
166 MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
167 addr, data);
168}
169
170static int mv88e6390_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
171 u16 *data, int len)
172{
173 return mv88e6390_g2_avb_port_ptp_read(chip,
174 MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
175 addr, data, len);
176}
177
178static int mv88e6390_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
179 u16 data)
180{
181 return mv88e6390_g2_avb_port_ptp_write(chip,
182 MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
183 addr, data);
184}
185
186const struct mv88e6xxx_avb_ops mv88e6390_avb_ops = {
187 .port_ptp_read = mv88e6390_g2_avb_port_ptp_read,
188 .port_ptp_write = mv88e6390_g2_avb_port_ptp_write,
189 .ptp_read = mv88e6390_g2_avb_ptp_read,
190 .ptp_write = mv88e6390_g2_avb_ptp_write,
191 .tai_read = mv88e6390_g2_avb_tai_read,
192 .tai_write = mv88e6390_g2_avb_tai_write,
193};
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