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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / b5f7c8732ad99b0c1a7fa456f706de1ab7d74eef / . / drivers / net / phy / realtek.c
blob: b7e2753f7bd8fbc3c8e311b0b50e86d80edfd335 [file] [log] [blame]
Andy Fleming9082eea2011-04-07 21:56:05 -0500[diff] [blame]1/*
2 * RealTek 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 <config.h>
24#include <common.h>
25#include <phy.h>
26
27#define PHY_AUTONEGOTIATE_TIMEOUT 5000
28
29/* RTL8211B PHY Status Register */
30#define MIIM_RTL8211B_PHY_STATUS 0x11
31#define MIIM_RTL8211B_PHYSTAT_SPEED 0xc000
32#define MIIM_RTL8211B_PHYSTAT_GBIT 0x8000
33#define MIIM_RTL8211B_PHYSTAT_100 0x4000
34#define MIIM_RTL8211B_PHYSTAT_DUPLEX 0x2000
35#define MIIM_RTL8211B_PHYSTAT_SPDDONE 0x0800
36#define MIIM_RTL8211B_PHYSTAT_LINK 0x0400
37
38
39/* RealTek RTL8211B */
40static int rtl8211b_config(struct phy_device *phydev)
41{
42 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);
43
44 genphy_config_aneg(phydev);
45
46 return 0;
47}
48
49static int rtl8211b_parse_status(struct phy_device *phydev)
50{
51 unsigned int speed;
52 unsigned int mii_reg;
53
54 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211B_PHY_STATUS);
55
56 if (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
57 int i = 0;
58
59 /* in case of timeout ->link is cleared */
60 phydev->link = 1;
61 puts("Waiting for PHY realtime link");
62 while (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
63 /* Timeout reached ? */
64 if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
65 puts(" TIMEOUT !\n");
66 phydev->link = 0;
67 break;
68 }
69
70 if ((i++ % 1000) == 0)
71 putc('.');
72 udelay(1000); /* 1 ms */
73 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE,
74 MIIM_RTL8211B_PHY_STATUS);
75 }
76 puts(" done\n");
77 udelay(500000); /* another 500 ms (results in faster booting) */
78 } else {
79 if (mii_reg & MIIM_RTL8211B_PHYSTAT_LINK)
80 phydev->link = 1;
81 else
82 phydev->link = 0;
83 }
84
85 if (mii_reg & MIIM_RTL8211B_PHYSTAT_DUPLEX)
86 phydev->duplex = DUPLEX_FULL;
87 else
88 phydev->duplex = DUPLEX_HALF;
89
90 speed = (mii_reg & MIIM_RTL8211B_PHYSTAT_SPEED);
91
92 switch (speed) {
93 case MIIM_RTL8211B_PHYSTAT_GBIT:
94 phydev->speed = SPEED_1000;
95 break;
96 case MIIM_RTL8211B_PHYSTAT_100:
97 phydev->speed = SPEED_100;
98 break;
99 default:
100 phydev->speed = SPEED_10;
101 }
102
103 return 0;
104}
105
106static int rtl8211b_startup(struct phy_device *phydev)
107{
108 /* Read the Status (2x to make sure link is right) */
109 genphy_update_link(phydev);
110 rtl8211b_parse_status(phydev);
111
112 return 0;
113}
114
115static struct phy_driver RTL8211B_driver = {
116 .name = "RealTek RTL8211B",
117 .uid = 0x1cc910,
118 .mask = 0xfffff0,
119 .features = PHY_GBIT_FEATURES,
120 .config = &rtl8211b_config,
121 .startup = &rtl8211b_startup,
122 .shutdown = &genphy_shutdown,
123};
124
125int phy_realtek_init(void)
126{
127 phy_register(&RTL8211B_driver);
128
129 return 0;
130}