1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* Broadcom BCM5221 Ethernet PHY
*
* (C) Copyright 2005 REA Elektronik GmbH <www.rea.de>
* Anders Larsen <alarsen@rea.de>
*
* (C) Copyright 2003
* Author : Hamid Ikdoumi (Atmel)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <at91rm9200_net.h>
#include <net.h>
#include <bcm5221.h>
#ifdef CONFIG_DRIVER_ETHER
#if (CONFIG_COMMANDS & CFG_CMD_NET) || defined(CONFIG_CMD_NET)
/*
* Name:
* bcm5221_IsPhyConnected
* Description:
* Reads the 2 PHY ID registers
* Arguments:
* p_mac - pointer to AT91S_EMAC struct
* Return value:
* TRUE - if id read successfully
* FALSE- if error
*/
unsigned int bcm5221_IsPhyConnected (AT91PS_EMAC p_mac)
{
unsigned short Id1, Id2;
at91rm9200_EmacEnableMDIO (p_mac);
at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID1, &Id1);
at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID2, &Id2);
at91rm9200_EmacDisableMDIO (p_mac);
if ((Id1 == (BCM5221_PHYID1_OUI >> 6)) &&
((Id2 >> 10) == (BCM5221_PHYID1_OUI & BCM5221_LSB_MASK)))
return TRUE;
return FALSE;
}
/*
* Name:
* bcm5221_GetLinkSpeed
* Description:
* Link parallel detection status of MAC is checked and set in the
* MAC configuration registers
* Arguments:
* p_mac - pointer to MAC
* Return value:
* TRUE - if link status set succesfully
* FALSE - if link status not set
*/
unsigned char bcm5221_GetLinkSpeed (AT91PS_EMAC p_mac)
{
unsigned short stat1, stat2;
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &stat1))
return FALSE;
if (!(stat1 & BCM5221_LINK_STATUS)) /* link status up? */
return FALSE;
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ACSR, &stat2))
return FALSE;
if ((stat1 & BCM5221_100BASE_TX_FD) && (stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
/*set Emac for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return TRUE;
}
if ((stat1 & BCM5221_10BASE_T_FD) && !(stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
/*set MII for 10BaseT and Full Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
return TRUE;
}
if ((stat1 & BCM5221_100BASE_TX_HD) && (stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
/*set MII for 100BaseTX and Half Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_SPD;
return TRUE;
}
if ((stat1 & BCM5221_10BASE_T_HD) && !(stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
/*set MII for 10BaseT and Half Duplex */
p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
return TRUE;
}
return FALSE;
}
/*
* Name:
* bcm5221_InitPhy
* Description:
* MAC starts checking its link by using parallel detection and
* Autonegotiation and the same is set in the MAC configuration registers
* Arguments:
* p_mac - pointer to struct AT91S_EMAC
* Return value:
* TRUE - if link status set succesfully
* FALSE - if link status not set
*/
unsigned char bcm5221_InitPhy (AT91PS_EMAC p_mac)
{
unsigned char ret = TRUE;
unsigned short IntValue;
at91rm9200_EmacEnableMDIO (p_mac);
if (!bcm5221_GetLinkSpeed (p_mac)) {
/* Try another time */
ret = bcm5221_GetLinkSpeed (p_mac);
}
/* Disable PHY Interrupts */
at91rm9200_EmacReadPhy (p_mac, BCM5221_INTR, &IntValue);
/* clear FDX LED and INTR Enable */
IntValue &= ~(BCM5221_FDX_LED | BCM5221_INTR_ENABLE);
/* set FDX, SPD, Link, INTR masks */
IntValue |= (BCM5221_FDX_MASK | BCM5221_SPD_MASK |
BCM5221_LINK_MASK | BCM5221_INTR_MASK);
at91rm9200_EmacWritePhy (p_mac, BCM5221_INTR, &IntValue);
at91rm9200_EmacDisableMDIO (p_mac);
return (ret);
}
/*
* Name:
* bcm5221_AutoNegotiate
* Description:
* MAC Autonegotiates with the partner status of same is set in the
* MAC configuration registers
* Arguments:
* dev - pointer to struct net_device
* Return value:
* TRUE - if link status set successfully
* FALSE - if link status not set
*/
unsigned char bcm5221_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
{
unsigned short value;
unsigned short PhyAnar;
unsigned short PhyAnalpar;
/* Set bcm5221 control register */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
value &= ~BCM5221_AUTONEG; /* remove autonegotiation enable */
value |= BCM5221_ISOLATE; /* Electrically isolate PHY */
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/* Set the Auto_negotiation Advertisement Register */
/* MII advertising for 100BaseTxFD and HD, 10BaseTFD and HD, IEEE 802.3 */
PhyAnar = BCM5221_TX_FDX | BCM5221_TX_HDX |
BCM5221_10_FDX | BCM5221_10_HDX | BCM5221_AN_IEEE_802_3;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_ANAR, &PhyAnar))
return FALSE;
/* Read the Control Register */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
value |= BCM5221_SPEED_SELECT | BCM5221_AUTONEG | BCM5221_DUPLEX_MODE;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/* Restart Auto_negotiation */
value |= BCM5221_RESTART_AUTONEG;
value &= ~BCM5221_ISOLATE;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/*check AutoNegotiate complete */
udelay (10000);
at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &value);
if (!(value & BCM5221_AUTONEG_COMP))
return FALSE;
/* Get the AutoNeg Link partner base page */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ANLPAR, &PhyAnalpar))
return FALSE;
if ((PhyAnar & BCM5221_TX_FDX) && (PhyAnalpar & BCM5221_TX_FDX)) {
/*set MII for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return TRUE;
}
if ((PhyAnar & BCM5221_10_FDX) && (PhyAnalpar & BCM5221_10_FDX)) {
/*set MII for 10BaseT and Full Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
return TRUE;
}
return FALSE;
}
#endif /* CONFIG_COMMANDS & CFG_CMD_NET */
#endif /* CONFIG_DRIVER_ETHER */
|
