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 <asm/octeon/cvmx-config.h>
39 #include <asm/octeon/cvmx-spi.h>
40 #include <asm/octeon/cvmx-helper.h>
41
42 #include <asm/octeon/cvmx-pip-defs.h>
43 #include <asm/octeon/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
__cvmx_helper_spi_enumerate(int interface)54 int __cvmx_helper_spi_enumerate(int interface)
55 {
56 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
57 cvmx_spi4000_is_present(interface)) {
58 return 10;
59 } else {
60 return 16;
61 }
62 }
63
64 /**
65 * Probe a SPI interface and determine the number of ports
66 * connected to it. The SPI interface should still be down after
67 * this call.
68 *
69 * @interface: Interface to probe
70 *
71 * Returns Number of ports on the interface. Zero to disable.
72 */
__cvmx_helper_spi_probe(int interface)73 int __cvmx_helper_spi_probe(int interface)
74 {
75 int num_ports = 0;
76
77 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
78 cvmx_spi4000_is_present(interface)) {
79 num_ports = 10;
80 } else {
81 union cvmx_pko_reg_crc_enable enable;
82 num_ports = 16;
83 /*
84 * Unlike the SPI4000, most SPI devices don't
85 * automatically put on the L2 CRC. For everything
86 * except for the SPI4000 have PKO append the L2 CRC
87 * to the packet.
88 */
89 enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
90 enable.s.enable |= 0xffff << (interface * 16);
91 cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
92 }
93 __cvmx_helper_setup_gmx(interface, num_ports);
94 return num_ports;
95 }
96
97 /**
98 * Bringup and enable a SPI interface. After this call packet I/O
99 * should be fully functional. This is called with IPD enabled but
100 * PKO disabled.
101 *
102 * @interface: Interface to bring up
103 *
104 * Returns Zero on success, negative on failure
105 */
__cvmx_helper_spi_enable(int interface)106 int __cvmx_helper_spi_enable(int interface)
107 {
108 /*
109 * Normally the ethernet L2 CRC is checked and stripped in the
110 * GMX block. When you are using SPI, this isn' the case and
111 * IPD needs to check the L2 CRC.
112 */
113 int num_ports = cvmx_helper_ports_on_interface(interface);
114 int ipd_port;
115 for (ipd_port = interface * 16; ipd_port < interface * 16 + num_ports;
116 ipd_port++) {
117 union cvmx_pip_prt_cfgx port_config;
118 port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
119 port_config.s.crc_en = 1;
120 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
121 }
122
123 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) {
124 cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX,
125 CVMX_HELPER_SPI_TIMEOUT, num_ports);
126 if (cvmx_spi4000_is_present(interface))
127 cvmx_spi4000_initialize(interface);
128 }
129 __cvmx_interrupt_spxx_int_msk_enable(interface);
130 __cvmx_interrupt_stxx_int_msk_enable(interface);
131 __cvmx_interrupt_gmxx_enable(interface);
132 return 0;
133 }
134
135 /**
136 * Return the link state of an IPD/PKO port as returned by
137 * auto negotiation. The result of this function may not match
138 * Octeon's link config if auto negotiation has changed since
139 * the last call to cvmx_helper_link_set().
140 *
141 * @ipd_port: IPD/PKO port to query
142 *
143 * Returns Link state
144 */
__cvmx_helper_spi_link_get(int ipd_port)145 cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port)
146 {
147 cvmx_helper_link_info_t result;
148 int interface = cvmx_helper_get_interface_num(ipd_port);
149 int index = cvmx_helper_get_interface_index_num(ipd_port);
150 result.u64 = 0;
151
152 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) {
153 /* The simulator gives you a simulated full duplex link */
154 result.s.link_up = 1;
155 result.s.full_duplex = 1;
156 result.s.speed = 10000;
157 } else if (cvmx_spi4000_is_present(interface)) {
158 union cvmx_gmxx_rxx_rx_inbnd inband =
159 cvmx_spi4000_check_speed(interface, index);
160 result.s.link_up = inband.s.status;
161 result.s.full_duplex = inband.s.duplex;
162 switch (inband.s.speed) {
163 case 0: /* 10 Mbps */
164 result.s.speed = 10;
165 break;
166 case 1: /* 100 Mbps */
167 result.s.speed = 100;
168 break;
169 case 2: /* 1 Gbps */
170 result.s.speed = 1000;
171 break;
172 case 3: /* Illegal */
173 result.s.speed = 0;
174 result.s.link_up = 0;
175 break;
176 }
177 } else {
178 /* For generic SPI we can't determine the link, just return some
179 sane results */
180 result.s.link_up = 1;
181 result.s.full_duplex = 1;
182 result.s.speed = 10000;
183 }
184 return result;
185 }
186
187 /**
188 * Configure an IPD/PKO port for the specified link state. This
189 * function does not influence auto negotiation at the PHY level.
190 * The passed link state must always match the link state returned
191 * by cvmx_helper_link_get(). It is normally best to use
192 * cvmx_helper_link_autoconf() instead.
193 *
194 * @ipd_port: IPD/PKO port to configure
195 * @link_info: The new link state
196 *
197 * Returns Zero on success, negative on failure
198 */
__cvmx_helper_spi_link_set(int ipd_port,cvmx_helper_link_info_t link_info)199 int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
200 {
201 /* Nothing to do. If we have a SPI4000 then the setup was already performed
202 by cvmx_spi4000_check_speed(). If not then there isn't any link
203 info */
204 return 0;
205 }
206