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