/***********************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; }
