David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 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 | /* |
| 29 | * Functions for LOOP initialization, configuration, |
| 30 | * and monitoring. |
| 31 | */ |
| 32 | #include <asm/octeon/octeon.h> |
| 33 | |
David Daney | af86649 | 2011-11-22 14:47:00 +0000 | [diff] [blame] | 34 | #include <asm/octeon/cvmx-config.h> |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 35 | |
David Daney | af86649 | 2011-11-22 14:47:00 +0000 | [diff] [blame] | 36 | #include <asm/octeon/cvmx-helper.h> |
| 37 | #include <asm/octeon/cvmx-pip-defs.h> |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 38 | |
| 39 | /** |
| 40 | * Probe a LOOP interface and determine the number of ports |
| 41 | * connected to it. The LOOP interface should still be down |
| 42 | * after this call. |
| 43 | * |
| 44 | * @interface: Interface to probe |
| 45 | * |
| 46 | * Returns Number of ports on the interface. Zero to disable. |
| 47 | */ |
| 48 | int __cvmx_helper_loop_probe(int interface) |
| 49 | { |
| 50 | union cvmx_ipd_sub_port_fcs ipd_sub_port_fcs; |
| 51 | int num_ports = 4; |
| 52 | int port; |
| 53 | |
| 54 | /* We need to disable length checking so packet < 64 bytes and jumbo |
| 55 | frames don't get errors */ |
| 56 | for (port = 0; port < num_ports; port++) { |
| 57 | union cvmx_pip_prt_cfgx port_cfg; |
| 58 | int ipd_port = cvmx_helper_get_ipd_port(interface, port); |
| 59 | port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port)); |
| 60 | port_cfg.s.maxerr_en = 0; |
| 61 | port_cfg.s.minerr_en = 0; |
| 62 | cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64); |
| 63 | } |
| 64 | |
| 65 | /* Disable FCS stripping for loopback ports */ |
| 66 | ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS); |
| 67 | ipd_sub_port_fcs.s.port_bit2 = 0; |
| 68 | cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64); |
| 69 | return num_ports; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Bringup and enable a LOOP interface. After this call packet |
| 74 | * I/O should be fully functional. This is called with IPD |
| 75 | * enabled but PKO disabled. |
| 76 | * |
| 77 | * @interface: Interface to bring up |
| 78 | * |
| 79 | * Returns Zero on success, negative on failure |
| 80 | */ |
| 81 | int __cvmx_helper_loop_enable(int interface) |
| 82 | { |
| 83 | /* Do nothing. */ |
| 84 | return 0; |
| 85 | } |