xref: /openbmc/u-boot/drivers/net/phy/natsemi.c (revision 843a7ee8)
1 /*
2  * National Semiconductor PHY drivers
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License as
6  * published by the Free Software Foundation; either version 2 of
7  * the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
17  * MA 02111-1307 USA
18  *
19  * Copyright 2010-2011 Freescale Semiconductor, Inc.
20  * author Andy Fleming
21  *
22  */
23 #include <phy.h>
24 
25 /* DP83865 Link and Auto-Neg Status Register */
26 #define MIIM_DP83865_LANR      0x11
27 #define MIIM_DP83865_SPD_MASK  0x0018
28 #define MIIM_DP83865_SPD_1000  0x0010
29 #define MIIM_DP83865_SPD_100   0x0008
30 #define MIIM_DP83865_DPX_FULL  0x0002
31 
32 
33 /* NatSemi DP83865 */
34 static int dp83865_config(struct phy_device *phydev)
35 {
36 	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);
37 	genphy_config_aneg(phydev);
38 
39 	return 0;
40 }
41 
42 static int dp83865_parse_status(struct phy_device *phydev)
43 {
44 	int mii_reg;
45 
46 	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_DP83865_LANR);
47 
48 	switch (mii_reg & MIIM_DP83865_SPD_MASK) {
49 
50 	case MIIM_DP83865_SPD_1000:
51 		phydev->speed = SPEED_1000;
52 		break;
53 
54 	case MIIM_DP83865_SPD_100:
55 		phydev->speed = SPEED_100;
56 		break;
57 
58 	default:
59 		phydev->speed = SPEED_10;
60 		break;
61 
62 	}
63 
64 	if (mii_reg & MIIM_DP83865_DPX_FULL)
65 		phydev->duplex = DUPLEX_FULL;
66 	else
67 		phydev->duplex = DUPLEX_HALF;
68 
69 	return 0;
70 }
71 
72 static int dp83865_startup(struct phy_device *phydev)
73 {
74 	genphy_update_link(phydev);
75 	dp83865_parse_status(phydev);
76 
77 	return 0;
78 }
79 
80 
81 static struct phy_driver DP83865_driver = {
82 	.name = "NatSemi DP83865",
83 	.uid = 0x20005c70,
84 	.mask = 0xfffffff0,
85 	.features = PHY_GBIT_FEATURES,
86 	.config = &dp83865_config,
87 	.startup = &dp83865_startup,
88 	.shutdown = &genphy_shutdown,
89 };
90 
91 int phy_natsemi_init(void)
92 {
93 	phy_register(&DP83865_driver);
94 
95 	return 0;
96 }
97