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 */
__cvmx_helper_loop_probe(int interface)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 */
__cvmx_helper_loop_enable(int interface)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