1 /*
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 /*
26 * Adapted for KwikByte KB920x board: 22APR2005
27 */
28
29 #include <common.h>
30 #include <at91rm9200_net.h>
31 #include <net.h>
32 #include <miiphy.h>
33 #include <lxt971a.h>
34
35 #ifdef CONFIG_DRIVER_ETHER
36
37 #if defined(CONFIG_CMD_NET)
38
39 /*
40 * Name:
41 * lxt972_IsPhyConnected
42 * Description:
43 * Reads the 2 PHY ID registers
44 * Arguments:
45 * p_mac - pointer to AT91S_EMAC struct
46 * Return value:
47 * TRUE - if id read successfully
48 * FALSE- if error
49 */
lxt972_IsPhyConnected(AT91PS_EMAC p_mac)50 unsigned int lxt972_IsPhyConnected (AT91PS_EMAC p_mac)
51 {
52 unsigned short Id1, Id2;
53
54 at91rm9200_EmacEnableMDIO (p_mac);
55 at91rm9200_EmacReadPhy(p_mac, PHY_PHYIDR1, &Id1);
56 at91rm9200_EmacReadPhy(p_mac, PHY_PHYIDR2, &Id2);
57 at91rm9200_EmacDisableMDIO (p_mac);
58
59 if ((Id1 == (0x0013)) && ((Id2 & 0xFFF0) == 0x78E0))
60 return TRUE;
61
62 return FALSE;
63 }
64
65 /*
66 * Name:
67 * lxt972_GetLinkSpeed
68 * Description:
69 * Link parallel detection status of MAC is checked and set in the
70 * MAC configuration registers
71 * Arguments:
72 * p_mac - pointer to MAC
73 * Return value:
74 * TRUE - if link status set succesfully
75 * FALSE - if link status not set
76 */
lxt972_GetLinkSpeed(AT91PS_EMAC p_mac)77 UCHAR lxt972_GetLinkSpeed (AT91PS_EMAC p_mac)
78 {
79 unsigned short stat1;
80
81 if (!at91rm9200_EmacReadPhy (p_mac, PHY_LXT971_STAT2, &stat1))
82 return FALSE;
83
84 if (!(stat1 & PHY_LXT971_STAT2_LINK)) /* link status up? */
85 return FALSE;
86
87 if (stat1 & PHY_LXT971_STAT2_100BTX) {
88
89 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
90
91 /*set Emac for 100BaseTX and Full Duplex */
92 p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
93 } else {
94
95 /*set Emac for 100BaseTX and Half Duplex */
96 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
97 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
98 | AT91C_EMAC_SPD;
99 }
100
101 return TRUE;
102
103 } else {
104
105 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
106
107 /*set MII for 10BaseT and Full Duplex */
108 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
109 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
110 | AT91C_EMAC_FD;
111 } else {
112
113 /*set MII for 10BaseT and Half Duplex */
114 p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
115 }
116
117 return TRUE;
118 }
119
120 return FALSE;
121 }
122
123
124 /*
125 * Name:
126 * lxt972_InitPhy
127 * Description:
128 * MAC starts checking its link by using parallel detection and
129 * Autonegotiation and the same is set in the MAC configuration registers
130 * Arguments:
131 * p_mac - pointer to struct AT91S_EMAC
132 * Return value:
133 * TRUE - if link status set succesfully
134 * FALSE - if link status not set
135 */
lxt972_InitPhy(AT91PS_EMAC p_mac)136 UCHAR lxt972_InitPhy (AT91PS_EMAC p_mac)
137 {
138 UCHAR ret = TRUE;
139
140 at91rm9200_EmacEnableMDIO (p_mac);
141
142 if (!lxt972_GetLinkSpeed (p_mac)) {
143 /* Try another time */
144 ret = lxt972_GetLinkSpeed (p_mac);
145 }
146
147 /* Disable PHY Interrupts */
148 at91rm9200_EmacWritePhy (p_mac, PHY_LXT971_INT_ENABLE, 0);
149
150 at91rm9200_EmacDisableMDIO (p_mac);
151
152 return (ret);
153 }
154
155
156 /*
157 * Name:
158 * lxt972_AutoNegotiate
159 * Description:
160 * MAC Autonegotiates with the partner status of same is set in the
161 * MAC configuration registers
162 * Arguments:
163 * dev - pointer to struct net_device
164 * Return value:
165 * TRUE - if link status set successfully
166 * FALSE - if link status not set
167 */
lxt972_AutoNegotiate(AT91PS_EMAC p_mac,int * status)168 UCHAR lxt972_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
169 {
170 unsigned short value;
171
172 /* Set lxt972 control register */
173 if (!at91rm9200_EmacReadPhy (p_mac, PHY_BMCR, &value))
174 return FALSE;
175
176 /* Restart Auto_negotiation */
177 value |= PHY_BMCR_RST_NEG;
178 if (!at91rm9200_EmacWritePhy (p_mac, PHY_BMCR, &value))
179 return FALSE;
180
181 /*check AutoNegotiate complete */
182 udelay (10000);
183 at91rm9200_EmacReadPhy(p_mac, PHY_BMSR, &value);
184 if (!(value & PHY_BMSR_AUTN_COMP))
185 return FALSE;
186
187 return (lxt972_GetLinkSpeed (p_mac));
188 }
189
190 #endif
191
192 #endif /* CONFIG_DRIVER_ETHER */
193