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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 | ||
af866496 | 34 | #include <asm/octeon/cvmx-config.h> |
80ff0fd3 | 35 | |
af866496 DD |
36 | #include <asm/octeon/cvmx-helper.h> |
37 | #include <asm/octeon/cvmx-pip-defs.h> | |
80ff0fd3 DD |
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 | } |