1/*-
2 * Copyright (c) 2003-2009 RMI Corporation
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of RMI Corporation, nor the names of its contributors,
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * RMI_BSD */
30/* MDIO Low level Access routines */
31/* All Phy's accessed from GMAC0 base */
32
33#ifndef _XGMAC_MDIO_H_
34#define _XGMAC_MDIO_H_
35
36static inline int
37xmdio_read(volatile unsigned int *_mmio,
38    uint32_t phy_addr, uint32_t address);
39static inline void
40xmdio_write(volatile unsigned int *_mmio,
41    uint32_t phy_addr, uint32_t address, uint32_t data);
42static inline void
43xmdio_address(volatile unsigned int *_mmio,
44    uint32_t phy_addr, uint32_t dev_ad, uint32_t address);
45
46static inline void
47xmdio_address(volatile unsigned int *_mmio,
48    uint32_t phy_addr, uint32_t dev_ad, uint32_t address)
49{
50	uint32_t st_field = 0x0;
51	uint32_t op_type = 0x0;	/* address operation */
52	uint32_t ta_field = 0x2;/* ta field */
53
54	_mmio[0x11] = ((st_field & 0x3) << 30) |
55	    ((op_type & 0x3) << 28) |
56	    ((phy_addr & 0x1F) << 23) |
57	    ((dev_ad & 0x1F) << 18) |
58	    ((ta_field & 0x3) << 16) |
59	    ((address & 0xffff) << 0);
60
61	_mmio[0x10] = (0x0 << 3) | 0x5;
62	_mmio[0x10] = (0x1 << 3) | 0x5;
63	_mmio[0x10] = (0x0 << 3) | 0x5;
64
65	/* wait for dev_ad cycle to complete */
66	while (_mmio[0x14] & 0x1) {
67	};
68
69}
70
71/* function prototypes */
72static inline int
73xmdio_read(volatile unsigned int *_mmio,
74    uint32_t phy_addr, uint32_t address)
75{
76	uint32_t st_field = 0x0;
77	uint32_t op_type = 0x3;	/* read operation */
78	uint32_t ta_field = 0x2;/* ta field */
79	uint32_t data = 0;
80
81	xmdio_address(_mmio, phy_addr, 5, address);
82	_mmio[0x11] = ((st_field & 0x3) << 30) |
83	    ((op_type & 0x3) << 28) |
84	    ((phy_addr & 0x1F) << 23) |
85	    ((5 & 0x1F) << 18) |
86	    ((ta_field & 0x3) << 16) |
87	    ((data & 0xffff) << 0);
88
89	_mmio[0x10] = (0x0 << 3) | 0x5;
90	_mmio[0x10] = (0x1 << 3) | 0x5;
91	_mmio[0x10] = (0x0 << 3) | 0x5;
92
93	/* wait for write cycle to complete */
94	while (_mmio[0x14] & 0x1) {
95	};
96
97	data = _mmio[0x11] & 0xffff;
98	return (data);
99}
100
101static inline void
102xmdio_write(volatile unsigned int *_mmio,
103    uint32_t phy_addr, uint32_t address, uint32_t data)
104{
105	uint32_t st_field = 0x0;
106	uint32_t op_type = 0x1;	/* write operation */
107	uint32_t ta_field = 0x2;/* ta field */
108
109	xmdio_address(_mmio, phy_addr, 5, address);
110	_mmio[0x11] = ((st_field & 0x3) << 30) |
111	    ((op_type & 0x3) << 28) |
112	    ((phy_addr & 0x1F) << 23) |
113	    ((5 & 0x1F) << 18) |
114	    ((ta_field & 0x3) << 16) |
115	    ((data & 0xffff) << 0);
116
117	_mmio[0x10] = (0x0 << 3) | 0x5;
118	_mmio[0x10] = (0x1 << 3) | 0x5;
119	_mmio[0x10] = (0x0 << 3) | 0x5;
120
121	/* wait for write cycle to complete */
122	while (_mmio[0x14] & 0x1) {
123	};
124
125}
126
127#endif
128