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