xref: /openbmc/u-boot/board/gdsys/common/miiphybb.c (revision fea25720)
1 /*
2  * (C) Copyright 2010
3  * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #include <common.h>
25 #include <miiphy.h>
26 
27 #include <asm/io.h>
28 
29 static int io_bb_mii_init(struct bb_miiphy_bus *bus)
30 {
31 	return 0;
32 }
33 
34 static int io_bb_mdio_active(struct bb_miiphy_bus *bus)
35 {
36 	out_be32((void *)GPIO0_TCR,
37 		in_be32((void *)GPIO0_TCR) | CONFIG_SYS_MDIO_PIN);
38 
39 	return 0;
40 }
41 
42 static int io_bb_mdio_tristate(struct bb_miiphy_bus *bus)
43 {
44 	out_be32((void *)GPIO0_TCR,
45 		in_be32((void *)GPIO0_TCR) & ~CONFIG_SYS_MDIO_PIN);
46 
47 	return 0;
48 }
49 
50 static int io_bb_set_mdio(struct bb_miiphy_bus *bus, int v)
51 {
52 	if (v)
53 		out_be32((void *)GPIO0_OR,
54 			in_be32((void *)GPIO0_OR) | CONFIG_SYS_MDIO_PIN);
55 	else
56 		out_be32((void *)GPIO0_OR,
57 			in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_MDIO_PIN);
58 
59 	return 0;
60 }
61 
62 static int io_bb_get_mdio(struct bb_miiphy_bus *bus, int *v)
63 {
64 	*v = ((in_be32((void *)GPIO0_IR) & CONFIG_SYS_MDIO_PIN) != 0);
65 
66 	return 0;
67 }
68 
69 static int io_bb_set_mdc(struct bb_miiphy_bus *bus, int v)
70 {
71 	if (v)
72 		out_be32((void *)GPIO0_OR,
73 			in_be32((void *)GPIO0_OR) | CONFIG_SYS_MDC_PIN);
74 	else
75 		out_be32((void *)GPIO0_OR,
76 			in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_MDC_PIN);
77 
78 	return 0;
79 }
80 
81 static int io_bb_delay(struct bb_miiphy_bus *bus)
82 {
83 	udelay(1);
84 
85 	return 0;
86 }
87 
88 struct bb_miiphy_bus bb_miiphy_buses[] = {
89 	{
90 		.name = CONFIG_SYS_GBIT_MII_BUSNAME,
91 		.init = io_bb_mii_init,
92 		.mdio_active = io_bb_mdio_active,
93 		.mdio_tristate = io_bb_mdio_tristate,
94 		.set_mdio = io_bb_set_mdio,
95 		.get_mdio = io_bb_get_mdio,
96 		.set_mdc = io_bb_set_mdc,
97 		.delay = io_bb_delay,
98 	}
99 };
100 
101 int bb_miiphy_buses_num = sizeof(bb_miiphy_buses) /
102 			  sizeof(bb_miiphy_buses[0]);
103