1*af866496SDavid Daney /***********************license start*************** 2*af866496SDavid Daney * Author: Cavium Networks 3*af866496SDavid Daney * 4*af866496SDavid Daney * Contact: support@caviumnetworks.com 5*af866496SDavid Daney * This file is part of the OCTEON SDK 6*af866496SDavid Daney * 7*af866496SDavid Daney * Copyright (c) 2003-2008 Cavium Networks 8*af866496SDavid Daney * 9*af866496SDavid Daney * This file is free software; you can redistribute it and/or modify 10*af866496SDavid Daney * it under the terms of the GNU General Public License, Version 2, as 11*af866496SDavid Daney * published by the Free Software Foundation. 12*af866496SDavid Daney * 13*af866496SDavid Daney * This file is distributed in the hope that it will be useful, but 14*af866496SDavid Daney * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15*af866496SDavid Daney * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16*af866496SDavid Daney * NONINFRINGEMENT. See the GNU General Public License for more 17*af866496SDavid Daney * details. 18*af866496SDavid Daney * 19*af866496SDavid Daney * You should have received a copy of the GNU General Public License 20*af866496SDavid Daney * along with this file; if not, write to the Free Software 21*af866496SDavid Daney * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22*af866496SDavid Daney * or visit http://www.gnu.org/licenses/. 23*af866496SDavid Daney * 24*af866496SDavid Daney * This file may also be available under a different license from Cavium. 25*af866496SDavid Daney * Contact Cavium Networks for more information 26*af866496SDavid Daney ***********************license end**************************************/ 27*af866496SDavid Daney 28*af866496SDavid Daney /* 29*af866496SDavid Daney * Functions for LOOP initialization, configuration, 30*af866496SDavid Daney * and monitoring. 31*af866496SDavid Daney */ 32*af866496SDavid Daney #include <asm/octeon/octeon.h> 33*af866496SDavid Daney 34*af866496SDavid Daney #include <asm/octeon/cvmx-config.h> 35*af866496SDavid Daney 36*af866496SDavid Daney #include <asm/octeon/cvmx-helper.h> 37*af866496SDavid Daney #include <asm/octeon/cvmx-pip-defs.h> 38*af866496SDavid Daney 39*af866496SDavid Daney /** 40*af866496SDavid Daney * Probe a LOOP interface and determine the number of ports 41*af866496SDavid Daney * connected to it. The LOOP interface should still be down 42*af866496SDavid Daney * after this call. 43*af866496SDavid Daney * 44*af866496SDavid Daney * @interface: Interface to probe 45*af866496SDavid Daney * 46*af866496SDavid Daney * Returns Number of ports on the interface. Zero to disable. 47*af866496SDavid Daney */ 48*af866496SDavid Daney int __cvmx_helper_loop_probe(int interface) 49*af866496SDavid Daney { 50*af866496SDavid Daney union cvmx_ipd_sub_port_fcs ipd_sub_port_fcs; 51*af866496SDavid Daney int num_ports = 4; 52*af866496SDavid Daney int port; 53*af866496SDavid Daney 54*af866496SDavid Daney /* We need to disable length checking so packet < 64 bytes and jumbo 55*af866496SDavid Daney frames don't get errors */ 56*af866496SDavid Daney for (port = 0; port < num_ports; port++) { 57*af866496SDavid Daney union cvmx_pip_prt_cfgx port_cfg; 58*af866496SDavid Daney int ipd_port = cvmx_helper_get_ipd_port(interface, port); 59*af866496SDavid Daney port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port)); 60*af866496SDavid Daney port_cfg.s.maxerr_en = 0; 61*af866496SDavid Daney port_cfg.s.minerr_en = 0; 62*af866496SDavid Daney cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64); 63*af866496SDavid Daney } 64*af866496SDavid Daney 65*af866496SDavid Daney /* Disable FCS stripping for loopback ports */ 66*af866496SDavid Daney ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS); 67*af866496SDavid Daney ipd_sub_port_fcs.s.port_bit2 = 0; 68*af866496SDavid Daney cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64); 69*af866496SDavid Daney return num_ports; 70*af866496SDavid Daney } 71*af866496SDavid Daney 72*af866496SDavid Daney /** 73*af866496SDavid Daney * Bringup and enable a LOOP interface. After this call packet 74*af866496SDavid Daney * I/O should be fully functional. This is called with IPD 75*af866496SDavid Daney * enabled but PKO disabled. 76*af866496SDavid Daney * 77*af866496SDavid Daney * @interface: Interface to bring up 78*af866496SDavid Daney * 79*af866496SDavid Daney * Returns Zero on success, negative on failure 80*af866496SDavid Daney */ 81*af866496SDavid Daney int __cvmx_helper_loop_enable(int interface) 82*af866496SDavid Daney { 83*af866496SDavid Daney /* Do nothing. */ 84*af866496SDavid Daney return 0; 85*af866496SDavid Daney } 86