1 /***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28 void __cvmx_interrupt_gmxx_enable(int interface);
29 void __cvmx_interrupt_spxx_int_msk_enable(int index);
30 void __cvmx_interrupt_stxx_int_msk_enable(int index);
31
32 /*
33 * Functions for SPI initialization, configuration,
34 * and monitoring.
35 */
36 #include <asm/octeon/octeon.h>
37
38 #include "cvmx-config.h"
39 #include "cvmx-spi.h"
40 #include "cvmx-helper.h"
41
42 #include "cvmx-pip-defs.h"
43 #include "cvmx-pko-defs.h"
44
45 /*
46 * CVMX_HELPER_SPI_TIMEOUT is used to determine how long the SPI
47 * initialization routines wait for SPI training. You can override the
48 * value using executive-config.h if necessary.
49 */
50 #ifndef CVMX_HELPER_SPI_TIMEOUT
51 #define CVMX_HELPER_SPI_TIMEOUT 10
52 #endif
53
54 /**
55 * Probe a SPI interface and determine the number of ports
56 * connected to it. The SPI interface should still be down after
57 * this call.
58 *
59 * @interface: Interface to probe
60 *
61 * Returns Number of ports on the interface. Zero to disable.
62 */
__cvmx_helper_spi_probe(int interface)63 int __cvmx_helper_spi_probe(int interface)
64 {
65 int num_ports = 0;
66
67 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
68 cvmx_spi4000_is_present(interface)) {
69 num_ports = 10;
70 } else {
71 union cvmx_pko_reg_crc_enable enable;
72 num_ports = 16;
73 /*
74 * Unlike the SPI4000, most SPI devices don't
75 * automatically put on the L2 CRC. For everything
76 * except for the SPI4000 have PKO append the L2 CRC
77 * to the packet.
78 */
79 enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
80 enable.s.enable |= 0xffff << (interface * 16);
81 cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
82 }
83 __cvmx_helper_setup_gmx(interface, num_ports);
84 return num_ports;
85 }
86
87 /**
88 * Bringup and enable a SPI interface. After this call packet I/O
89 * should be fully functional. This is called with IPD enabled but
90 * PKO disabled.
91 *
92 * @interface: Interface to bring up
93 *
94 * Returns Zero on success, negative on failure
95 */
__cvmx_helper_spi_enable(int interface)96 int __cvmx_helper_spi_enable(int interface)
97 {
98 /*
99 * Normally the ethernet L2 CRC is checked and stripped in the
100 * GMX block. When you are using SPI, this isn' the case and
101 * IPD needs to check the L2 CRC.
102 */
103 int num_ports = cvmx_helper_ports_on_interface(interface);
104 int ipd_port;
105 for (ipd_port = interface * 16; ipd_port < interface * 16 + num_ports;
106 ipd_port++) {
107 union cvmx_pip_prt_cfgx port_config;
108 port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
109 port_config.s.crc_en = 1;
110 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
111 }
112
113 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) {
114 cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX,
115 CVMX_HELPER_SPI_TIMEOUT, num_ports);
116 if (cvmx_spi4000_is_present(interface))
117 cvmx_spi4000_initialize(interface);
118 }
119 __cvmx_interrupt_spxx_int_msk_enable(interface);
120 __cvmx_interrupt_stxx_int_msk_enable(interface);
121 __cvmx_interrupt_gmxx_enable(interface);
122 return 0;
123 }
124
125 /**
126 * Return the link state of an IPD/PKO port as returned by
127 * auto negotiation. The result of this function may not match
128 * Octeon's link config if auto negotiation has changed since
129 * the last call to cvmx_helper_link_set().
130 *
131 * @ipd_port: IPD/PKO port to query
132 *
133 * Returns Link state
134 */
__cvmx_helper_spi_link_get(int ipd_port)135 cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port)
136 {
137 cvmx_helper_link_info_t result;
138 int interface = cvmx_helper_get_interface_num(ipd_port);
139 int index = cvmx_helper_get_interface_index_num(ipd_port);
140 result.u64 = 0;
141
142 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) {
143 /* The simulator gives you a simulated full duplex link */
144 result.s.link_up = 1;
145 result.s.full_duplex = 1;
146 result.s.speed = 10000;
147 } else if (cvmx_spi4000_is_present(interface)) {
148 union cvmx_gmxx_rxx_rx_inbnd inband =
149 cvmx_spi4000_check_speed(interface, index);
150 result.s.link_up = inband.s.status;
151 result.s.full_duplex = inband.s.duplex;
152 switch (inband.s.speed) {
153 case 0: /* 10 Mbps */
154 result.s.speed = 10;
155 break;
156 case 1: /* 100 Mbps */
157 result.s.speed = 100;
158 break;
159 case 2: /* 1 Gbps */
160 result.s.speed = 1000;
161 break;
162 case 3: /* Illegal */
163 result.s.speed = 0;
164 result.s.link_up = 0;
165 break;
166 }
167 } else {
168 /* For generic SPI we can't determine the link, just return some
169 sane results */
170 result.s.link_up = 1;
171 result.s.full_duplex = 1;
172 result.s.speed = 10000;
173 }
174 return result;
175 }
176
177 /**
178 * Configure an IPD/PKO port for the specified link state. This
179 * function does not influence auto negotiation at the PHY level.
180 * The passed link state must always match the link state returned
181 * by cvmx_helper_link_get(). It is normally best to use
182 * cvmx_helper_link_autoconf() instead.
183 *
184 * @ipd_port: IPD/PKO port to configure
185 * @link_info: The new link state
186 *
187 * Returns Zero on success, negative on failure
188 */
__cvmx_helper_spi_link_set(int ipd_port,cvmx_helper_link_info_t link_info)189 int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
190 {
191 /* Nothing to do. If we have a SPI4000 then the setup was already performed
192 by cvmx_spi4000_check_speed(). If not then there isn't any link
193 info */
194 return 0;
195 }
196