1 /*************************************************************************
2 SPDX-License-Identifier: BSD-3-Clause
3
4 Copyright (c) 2003-2007 Cavium Networks ([email protected]). All rights
5 reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are
9 met:
10
11 * Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13
14 * Redistributions in binary form must reproduce the above
15 copyright notice, this list of conditions and the following
16 disclaimer in the documentation and/or other materials provided
17 with the distribution.
18
19 * Neither the name of Cavium Networks nor the names of
20 its contributors may be used to endorse or promote products
21 derived from this software without specific prior written
22 permission.
23
24 This Software, including technical data, may be subject to U.S. export control laws, including the U.S. Export Administration Act and its associated regulations, and may be subject to export or import regulations in other countries.
25
26 TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
27 AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
28
29 *************************************************************************/
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/endian.h>
38 #include <sys/kernel.h>
39 #include <sys/mbuf.h>
40 #include <sys/socket.h>
41 #include <sys/lock.h>
42 #include <sys/mutex.h>
43
44 #include <net/ethernet.h>
45 #include <net/if.h>
46 #include <net/if_var.h>
47
48 #include "wrapper-cvmx-includes.h"
49 #include "ethernet-headers.h"
50
51 struct mtx cvm_oct_mdio_mtx;
52 MTX_SYSINIT(cvm_oct_mdio, &cvm_oct_mdio_mtx, "MDIO", MTX_DEF);
53
54 /**
55 * Perform an MII read. Called by the generic MII routines
56 *
57 * @param dev Device to perform read for
58 * @param phy_id The MII phy id
59 * @param location Register location to read
60 * @return Result from the read or zero on failure
61 */
cvm_oct_mdio_read(struct ifnet * ifp,int phy_id,int location)62 int cvm_oct_mdio_read(struct ifnet *ifp, int phy_id, int location)
63 {
64 cvmx_smi_cmd_t smi_cmd;
65 cvmx_smi_rd_dat_t smi_rd;
66
67 MDIO_LOCK();
68 smi_cmd.u64 = 0;
69 smi_cmd.s.phy_op = 1;
70 smi_cmd.s.phy_adr = phy_id;
71 smi_cmd.s.reg_adr = location;
72 cvmx_write_csr(CVMX_SMI_CMD, smi_cmd.u64);
73
74 do {
75 cvmx_wait(1000);
76 smi_rd.u64 = cvmx_read_csr(CVMX_SMI_RD_DAT);
77 } while (smi_rd.s.pending);
78
79 MDIO_UNLOCK();
80
81 if (smi_rd.s.val)
82 return smi_rd.s.dat;
83 else
84 return 0;
85 }
86
87 /**
88 * Perform an MII write. Called by the generic MII routines
89 *
90 * @param dev Device to perform write for
91 * @param phy_id The MII phy id
92 * @param location Register location to write
93 * @param val Value to write
94 */
cvm_oct_mdio_write(struct ifnet * ifp,int phy_id,int location,int val)95 void cvm_oct_mdio_write(struct ifnet *ifp, int phy_id, int location, int val)
96 {
97 cvmx_smi_cmd_t smi_cmd;
98 cvmx_smi_wr_dat_t smi_wr;
99
100 MDIO_LOCK();
101 smi_wr.u64 = 0;
102 smi_wr.s.dat = val;
103 cvmx_write_csr(CVMX_SMI_WR_DAT, smi_wr.u64);
104
105 smi_cmd.u64 = 0;
106 smi_cmd.s.phy_op = 0;
107 smi_cmd.s.phy_adr = phy_id;
108 smi_cmd.s.reg_adr = location;
109 cvmx_write_csr(CVMX_SMI_CMD, smi_cmd.u64);
110
111 do {
112 cvmx_wait(1000);
113 smi_wr.u64 = cvmx_read_csr(CVMX_SMI_WR_DAT);
114 } while (smi_wr.s.pending);
115 MDIO_UNLOCK();
116 }
117
118 /**
119 * Setup the MDIO device structures
120 *
121 * @param dev Device to setup
122 *
123 * @return Zero on success, negative on failure
124 */
cvm_oct_mdio_setup_device(struct ifnet * ifp)125 int cvm_oct_mdio_setup_device(struct ifnet *ifp)
126 {
127 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
128
129 priv->phy_id = cvmx_helper_board_get_mii_address(priv->port);
130 priv->phy_device = NULL;
131 priv->mdio_read = NULL;
132 priv->mdio_write = NULL;
133
134 return 0;
135 }
136