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
|
/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (C) 2003-2018 Cavium, Inc.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/*
* Functions for SPI initialization, configuration,
* and monitoring.
*/
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-spi.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-pip-defs.h>
#include <asm/octeon/cvmx-pko-defs.h>
#include <asm/octeon/cvmx-spxx-defs.h>
#include <asm/octeon/cvmx-stxx-defs.h>
/*
* CVMX_HELPER_SPI_TIMEOUT is used to determine how long the SPI
* initialization routines wait for SPI training. You can override the
* value using executive-config.h if necessary.
*/
#ifndef CVMX_HELPER_SPI_TIMEOUT
#define CVMX_HELPER_SPI_TIMEOUT 10
#endif
int __cvmx_helper_spi_enumerate(int interface)
{
if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
cvmx_spi4000_is_present(interface)) {
return 10;
} else {
return 16;
}
}
/**
* Probe a SPI interface and determine the number of ports
* connected to it. The SPI interface should still be down after
* this call.
*
* @interface: Interface to probe
*
* Returns Number of ports on the interface. Zero to disable.
*/
int __cvmx_helper_spi_probe(int interface)
{
int num_ports = 0;
if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
cvmx_spi4000_is_present(interface)) {
num_ports = 10;
} else {
union cvmx_pko_reg_crc_enable enable;
num_ports = 16;
/*
* Unlike the SPI4000, most SPI devices don't
* automatically put on the L2 CRC. For everything
* except for the SPI4000 have PKO append the L2 CRC
* to the packet.
*/
enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
enable.s.enable |= 0xffff << (interface * 16);
cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
}
__cvmx_helper_setup_gmx(interface, num_ports);
return num_ports;
}
/**
* Bringup and enable a SPI interface. After this call packet I/O
* should be fully functional. This is called with IPD enabled but
* PKO disabled.
*
* @interface: Interface to bring up
*
* Returns Zero on success, negative on failure
*/
int __cvmx_helper_spi_enable(int interface)
{
/*
* Normally the ethernet L2 CRC is checked and stripped in the
* GMX block. When you are using SPI, this isn' the case and
* IPD needs to check the L2 CRC.
*/
int num_ports = cvmx_helper_ports_on_interface(interface);
int ipd_port;
for (ipd_port = interface * 16; ipd_port < interface * 16 + num_ports;
ipd_port++) {
union cvmx_pip_prt_cfgx port_config;
port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
port_config.s.crc_en = 1;
cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
}
if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) {
cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX,
CVMX_HELPER_SPI_TIMEOUT, num_ports);
if (cvmx_spi4000_is_present(interface))
cvmx_spi4000_initialize(interface);
}
__cvmx_interrupt_spxx_int_msk_enable(interface);
__cvmx_interrupt_stxx_int_msk_enable(interface);
__cvmx_interrupt_gmxx_enable(interface);
return 0;
}
/**
* Return the link state of an IPD/PKO port as returned by
* auto negotiation. The result of this function may not match
* Octeon's link config if auto negotiation has changed since
* the last call to cvmx_helper_link_set().
*
* @ipd_port: IPD/PKO port to query
*
* Returns Link state
*/
union cvmx_helper_link_info __cvmx_helper_spi_link_get(int ipd_port)
{
union cvmx_helper_link_info result;
int interface = cvmx_helper_get_interface_num(ipd_port);
int index = cvmx_helper_get_interface_index_num(ipd_port);
result.u64 = 0;
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) {
/* The simulator gives you a simulated full duplex link */
result.s.link_up = 1;
result.s.full_duplex = 1;
result.s.speed = 10000;
} else if (cvmx_spi4000_is_present(interface)) {
union cvmx_gmxx_rxx_rx_inbnd inband =
cvmx_spi4000_check_speed(interface, index);
result.s.link_up = inband.s.status;
result.s.full_duplex = inband.s.duplex;
switch (inband.s.speed) {
case 0: /* 10 Mbps */
result.s.speed = 10;
break;
case 1: /* 100 Mbps */
result.s.speed = 100;
break;
case 2: /* 1 Gbps */
result.s.speed = 1000;
break;
case 3: /* Illegal */
result.s.speed = 0;
result.s.link_up = 0;
break;
}
} else {
/* For generic SPI we can't determine the link, just return some
sane results */
result.s.link_up = 1;
result.s.full_duplex = 1;
result.s.speed = 10000;
}
return result;
}
/**
* Configure an IPD/PKO port for the specified link state. This
* function does not influence auto negotiation at the PHY level.
* The passed link state must always match the link state returned
* by cvmx_helper_link_get().
*
* @ipd_port: IPD/PKO port to configure
* @link_info: The new link state
*
* Returns Zero on success, negative on failure
*/
int __cvmx_helper_spi_link_set(int ipd_port, union cvmx_helper_link_info link_info)
{
/* Nothing to do. If we have a SPI4000 then the setup was already performed
by cvmx_spi4000_check_speed(). If not then there isn't any link
info */
return 0;
}
|
