1/*************************************************************************
2Copyright (c) 2003-2007  Cavium Networks (support@cavium.com). All rights
3reserved.
4
5
6Redistribution and use in source and binary forms, with or without
7modification, are permitted provided that the following conditions are
8met:
9
10    * Redistributions of source code must retain the above copyright
11      notice, this list of conditions and the following disclaimer.
12
13    * Redistributions in binary form must reproduce the above
14      copyright notice, this list of conditions and the following
15      disclaimer in the documentation and/or other materials provided
16      with the distribution.
17
18    * Neither the name of Cavium Networks nor the names of
19      its contributors may be used to endorse or promote products
20      derived from this software without specific prior written
21      permission.
22
23This 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.
24
25TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
26AND 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.
27
28*************************************************************************/
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/bus.h>
36#include <sys/endian.h>
37#include <sys/kernel.h>
38#include <sys/mbuf.h>
39#include <sys/socket.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42
43#include <net/ethernet.h>
44#include <net/if.h>
45#include <net/if_var.h>
46
47#include "wrapper-cvmx-includes.h"
48#include "ethernet-headers.h"
49
50struct mtx cvm_oct_mdio_mtx;
51MTX_SYSINIT(cvm_oct_mdio, &cvm_oct_mdio_mtx, "MDIO", MTX_DEF);
52
53/**
54 * Perform an MII read. Called by the generic MII routines
55 *
56 * @param dev      Device to perform read for
57 * @param phy_id   The MII phy id
58 * @param location Register location to read
59 * @return Result from the read or zero on failure
60 */
61int cvm_oct_mdio_read(struct ifnet *ifp, int phy_id, int location)
62{
63	cvmx_smi_cmd_t          smi_cmd;
64	cvmx_smi_rd_dat_t       smi_rd;
65
66	MDIO_LOCK();
67	smi_cmd.u64 = 0;
68	smi_cmd.s.phy_op = 1;
69	smi_cmd.s.phy_adr = phy_id;
70	smi_cmd.s.reg_adr = location;
71	cvmx_write_csr(CVMX_SMI_CMD, smi_cmd.u64);
72
73	do {
74		cvmx_wait(1000);
75		smi_rd.u64 = cvmx_read_csr(CVMX_SMI_RD_DAT);
76	} while (smi_rd.s.pending);
77
78	MDIO_UNLOCK();
79
80	if (smi_rd.s.val)
81		return smi_rd.s.dat;
82	else
83		return 0;
84}
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 */
95void 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 */
125int 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
137