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Wolfgang Denk99b0d282005-10-05 00:19:34 +02001/*
2 *
3 * (C) Copyright 2003
4 * Author : Hamid Ikdoumi (Atmel)
5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * MA 02111-1307 USA
23 */
24
25/*
Wolfgang Denk080bdb72005-10-05 01:51:29 +020026 * Adapted for KwikByte KB920x board: 22APR2005
Wolfgang Denk99b0d282005-10-05 00:19:34 +020027 */
28
Wolfgang Denk080bdb72005-10-05 01:51:29 +020029#include <common.h>
Wolfgang Denk99b0d282005-10-05 00:19:34 +020030#include <at91rm9200_net.h>
31#include <net.h>
32#include <lxt971a.h>
33
34#ifdef CONFIG_DRIVER_ETHER
35
36#if (CONFIG_COMMANDS & CFG_CMD_NET)
37
38/*
39 * Name:
40 * lxt972_IsPhyConnected
41 * Description:
42 * Reads the 2 PHY ID registers
43 * Arguments:
44 * p_mac - pointer to AT91S_EMAC struct
45 * Return value:
46 * TRUE - if id read successfully
47 * FALSE- if error
48 */
Wolfgang Denk080bdb72005-10-05 01:51:29 +020049unsigned int lxt972_IsPhyConnected (AT91PS_EMAC p_mac)
Wolfgang Denk99b0d282005-10-05 00:19:34 +020050{
51 unsigned short Id1, Id2;
52
53 at91rm9200_EmacEnableMDIO (p_mac);
54 at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_ID1, &Id1);
55 at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_ID2, &Id2);
56 at91rm9200_EmacDisableMDIO (p_mac);
57
58 if ((Id1 == (0x0013)) && ((Id2 & 0xFFF0) == 0x78E0))
59 return TRUE;
60
61 return FALSE;
62}
63
64/*
65 * Name:
66 * lxt972_GetLinkSpeed
67 * Description:
68 * Link parallel detection status of MAC is checked and set in the
69 * MAC configuration registers
70 * Arguments:
71 * p_mac - pointer to MAC
72 * Return value:
73 * TRUE - if link status set succesfully
74 * FALSE - if link status not set
75 */
Wolfgang Denk080bdb72005-10-05 01:51:29 +020076UCHAR lxt972_GetLinkSpeed (AT91PS_EMAC p_mac)
Wolfgang Denk99b0d282005-10-05 00:19:34 +020077{
78 unsigned short stat1;
79
80 if (!at91rm9200_EmacReadPhy (p_mac, PHY_LXT971_STAT2, &stat1))
81 return FALSE;
82
83 if (!(stat1 & PHY_LXT971_STAT2_LINK)) /* link status up? */
84 return FALSE;
85
86 if (stat1 & PHY_LXT971_STAT2_100BTX) {
87
88 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
89
90 /*set Emac for 100BaseTX and Full Duplex */
91 p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
92 } else {
93
94 /*set Emac for 100BaseTX and Half Duplex */
95 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
96 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
97 | AT91C_EMAC_SPD;
98 }
99
100 return TRUE;
101
102 } else {
103
104 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
105
106 /*set MII for 10BaseT and Full Duplex */
107 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
108 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
109 | AT91C_EMAC_FD;
110 } else {
111
112 /*set MII for 10BaseT and Half Duplex */
113 p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
114 }
115
116 return TRUE;
117 }
118
119 return FALSE;
120}
121
122
123/*
124 * Name:
125 * lxt972_InitPhy
126 * Description:
127 * MAC starts checking its link by using parallel detection and
128 * Autonegotiation and the same is set in the MAC configuration registers
129 * Arguments:
130 * p_mac - pointer to struct AT91S_EMAC
131 * Return value:
132 * TRUE - if link status set succesfully
133 * FALSE - if link status not set
134 */
Wolfgang Denk080bdb72005-10-05 01:51:29 +0200135UCHAR lxt972_InitPhy (AT91PS_EMAC p_mac)
Wolfgang Denk99b0d282005-10-05 00:19:34 +0200136{
137 UCHAR ret = TRUE;
138
139 at91rm9200_EmacEnableMDIO (p_mac);
140
141 if (!lxt972_GetLinkSpeed (p_mac)) {
142 /* Try another time */
143 ret = lxt972_GetLinkSpeed (p_mac);
144 }
145
146 /* Disable PHY Interrupts */
147 at91rm9200_EmacWritePhy (p_mac, PHY_LXT971_INT_ENABLE, 0);
148
149 at91rm9200_EmacDisableMDIO (p_mac);
150
151 return (ret);
152}
153
154
155/*
156 * Name:
157 * lxt972_AutoNegotiate
158 * Description:
159 * MAC Autonegotiates with the partner status of same is set in the
160 * MAC configuration registers
161 * Arguments:
162 * dev - pointer to struct net_device
163 * Return value:
164 * TRUE - if link status set successfully
165 * FALSE - if link status not set
166 */
Wolfgang Denk080bdb72005-10-05 01:51:29 +0200167UCHAR lxt972_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
Wolfgang Denk99b0d282005-10-05 00:19:34 +0200168{
169 unsigned short value;
170
171 /* Set lxt972 control register */
172 if (!at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_CTRL, &value))
173 return FALSE;
174
175 /* Restart Auto_negotiation */
176 value |= PHY_COMMON_CTRL_RES_AUTO;
177 if (!at91rm9200_EmacWritePhy (p_mac, PHY_COMMON_CTRL, &value))
178 return FALSE;
179
180 /*check AutoNegotiate complete */
181 udelay (10000);
182 at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_STAT, &value);
183 if (!(value & PHY_COMMON_STAT_AN_COMP))
184 return FALSE;
185
186 return (lxt972_GetLinkSpeed (p_mac));
187}
188
Wolfgang Denk99b0d282005-10-05 00:19:34 +0200189#endif /* CONFIG_COMMANDS & CFG_CMD_NET */
190
191#endif /* CONFIG_DRIVER_ETHER */