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) 2003-2018 Cavium, Inc. 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 /* 29 * Functions for SPI initialization, configuration, 30 * and monitoring. 31 */ 32 #include <asm/octeon/octeon.h> 33 34 #include <asm/octeon/cvmx-config.h> 35 #include <asm/octeon/cvmx-spi.h> 36 #include <asm/octeon/cvmx-helper.h> 37 38 #include <asm/octeon/cvmx-pip-defs.h> 39 #include <asm/octeon/cvmx-pko-defs.h> 40 #include <asm/octeon/cvmx-spxx-defs.h> 41 #include <asm/octeon/cvmx-stxx-defs.h> 42 43 /* 44 * CVMX_HELPER_SPI_TIMEOUT is used to determine how long the SPI 45 * initialization routines wait for SPI training. You can override the 46 * value using executive-config.h if necessary. 47 */ 48 #ifndef CVMX_HELPER_SPI_TIMEOUT 49 #define CVMX_HELPER_SPI_TIMEOUT 10 50 #endif 51 52 int __cvmx_helper_spi_enumerate(int interface) 53 { 54 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) && 55 cvmx_spi4000_is_present(interface)) { 56 return 10; 57 } else { 58 return 16; 59 } 60 } 61 62 /** 63 * Probe a SPI interface and determine the number of ports 64 * connected to it. The SPI interface should still be down after 65 * this call. 66 * 67 * @interface: Interface to probe 68 * 69 * Returns Number of ports on the interface. Zero to disable. 70 */ 71 int __cvmx_helper_spi_probe(int interface) 72 { 73 int num_ports = 0; 74 75 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) && 76 cvmx_spi4000_is_present(interface)) { 77 num_ports = 10; 78 } else { 79 union cvmx_pko_reg_crc_enable enable; 80 num_ports = 16; 81 /* 82 * Unlike the SPI4000, most SPI devices don't 83 * automatically put on the L2 CRC. For everything 84 * except for the SPI4000 have PKO append the L2 CRC 85 * to the packet. 86 */ 87 enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE); 88 enable.s.enable |= 0xffff << (interface * 16); 89 cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64); 90 } 91 __cvmx_helper_setup_gmx(interface, num_ports); 92 return num_ports; 93 } 94 95 /** 96 * Bringup and enable a SPI interface. After this call packet I/O 97 * should be fully functional. This is called with IPD enabled but 98 * PKO disabled. 99 * 100 * @interface: Interface to bring up 101 * 102 * Returns Zero on success, negative on failure 103 */ 104 int __cvmx_helper_spi_enable(int interface) 105 { 106 /* 107 * Normally the ethernet L2 CRC is checked and stripped in the 108 * GMX block. When you are using SPI, this isn' the case and 109 * IPD needs to check the L2 CRC. 110 */ 111 int num_ports = cvmx_helper_ports_on_interface(interface); 112 int ipd_port; 113 for (ipd_port = interface * 16; ipd_port < interface * 16 + num_ports; 114 ipd_port++) { 115 union cvmx_pip_prt_cfgx port_config; 116 port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port)); 117 port_config.s.crc_en = 1; 118 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64); 119 } 120 121 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) { 122 cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX, 123 CVMX_HELPER_SPI_TIMEOUT, num_ports); 124 if (cvmx_spi4000_is_present(interface)) 125 cvmx_spi4000_initialize(interface); 126 } 127 __cvmx_interrupt_spxx_int_msk_enable(interface); 128 __cvmx_interrupt_stxx_int_msk_enable(interface); 129 __cvmx_interrupt_gmxx_enable(interface); 130 return 0; 131 } 132 133 /** 134 * Return the link state of an IPD/PKO port as returned by 135 * auto negotiation. The result of this function may not match 136 * Octeon's link config if auto negotiation has changed since 137 * the last call to cvmx_helper_link_set(). 138 * 139 * @ipd_port: IPD/PKO port to query 140 * 141 * Returns Link state 142 */ 143 union cvmx_helper_link_info __cvmx_helper_spi_link_get(int ipd_port) 144 { 145 union cvmx_helper_link_info result; 146 int interface = cvmx_helper_get_interface_num(ipd_port); 147 int index = cvmx_helper_get_interface_index_num(ipd_port); 148 result.u64 = 0; 149 150 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) { 151 /* The simulator gives you a simulated full duplex link */ 152 result.s.link_up = 1; 153 result.s.full_duplex = 1; 154 result.s.speed = 10000; 155 } else if (cvmx_spi4000_is_present(interface)) { 156 union cvmx_gmxx_rxx_rx_inbnd inband = 157 cvmx_spi4000_check_speed(interface, index); 158 result.s.link_up = inband.s.status; 159 result.s.full_duplex = inband.s.duplex; 160 switch (inband.s.speed) { 161 case 0: /* 10 Mbps */ 162 result.s.speed = 10; 163 break; 164 case 1: /* 100 Mbps */ 165 result.s.speed = 100; 166 break; 167 case 2: /* 1 Gbps */ 168 result.s.speed = 1000; 169 break; 170 case 3: /* Illegal */ 171 result.s.speed = 0; 172 result.s.link_up = 0; 173 break; 174 } 175 } else { 176 /* For generic SPI we can't determine the link, just return some 177 sane results */ 178 result.s.link_up = 1; 179 result.s.full_duplex = 1; 180 result.s.speed = 10000; 181 } 182 return result; 183 } 184 185 /** 186 * Configure an IPD/PKO port for the specified link state. This 187 * function does not influence auto negotiation at the PHY level. 188 * The passed link state must always match the link state returned 189 * by cvmx_helper_link_get(). 190 * 191 * @ipd_port: IPD/PKO port to configure 192 * @link_info: The new link state 193 * 194 * Returns Zero on success, negative on failure 195 */ 196 int __cvmx_helper_spi_link_set(int ipd_port, union cvmx_helper_link_info link_info) 197 { 198 /* Nothing to do. If we have a SPI4000 then the setup was already performed 199 by cvmx_spi4000_check_speed(). If not then there isn't any link 200 info */ 201 return 0; 202 } 203