1 /*
2 * Broadcom BCM5221 Ethernet PHY
3 *
4 * (C) Copyright 2005 REA Elektronik GmbH <www.rea.de>
5 * Anders Larsen <alarsen@rea.de>
6 *
7 * (C) Copyright 2003
8 * Author : Hamid Ikdoumi (Atmel)
9 *
10 * See file CREDITS for list of people who contributed to this
11 * project.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 * MA 02111-1307 USA
27 */
28
29 #include <at91rm9200_net.h>
30 #include <net.h>
31 #ifdef CONFIG_DRIVER_ETHER
32
33 #include <bcm5221.h>
34
35 #if defined(CONFIG_CMD_NET)
36
37 /*
38 * Name:
39 * bcm5221_IsPhyConnected
40 * Description:
41 * Reads the 2 PHY ID registers
42 * Arguments:
43 * p_mac - pointer to AT91S_EMAC struct
44 * Return value:
45 * TRUE - if id read successfully
46 * FALSE- if error
47 */
bcm5221_IsPhyConnected(AT91PS_EMAC p_mac)48 unsigned int bcm5221_IsPhyConnected (AT91PS_EMAC p_mac)
49 {
50 unsigned short Id1, Id2;
51
52 at91rm9200_EmacEnableMDIO (p_mac);
53 at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID1, &Id1);
54 at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID2, &Id2);
55 at91rm9200_EmacDisableMDIO (p_mac);
56
57 if ((Id1 == (BCM5221_PHYID1_OUI >> 6)) &&
58 ((Id2 >> 10) == (BCM5221_PHYID1_OUI & BCM5221_LSB_MASK)))
59 return TRUE;
60
61 return FALSE;
62 }
63
64 /*
65 * Name:
66 * bcm5221_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 */
bcm5221_GetLinkSpeed(AT91PS_EMAC p_mac)76 unsigned char bcm5221_GetLinkSpeed (AT91PS_EMAC p_mac)
77 {
78 unsigned short stat1, stat2;
79
80 if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &stat1))
81 return FALSE;
82
83 if (!(stat1 & BCM5221_LINK_STATUS)) /* link status up? */
84 return FALSE;
85
86 if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ACSR, &stat2))
87 return FALSE;
88
89 if ((stat1 & BCM5221_100BASE_TX_FD) && (stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
90 /*set Emac for 100BaseTX and Full Duplex */
91 p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
92 return TRUE;
93 }
94
95 if ((stat1 & BCM5221_10BASE_T_FD) && !(stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
96 /*set MII for 10BaseT and Full Duplex */
97 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
98 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
99 | AT91C_EMAC_FD;
100 return TRUE;
101 }
102
103 if ((stat1 & BCM5221_100BASE_TX_HD) && (stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
104 /*set MII for 100BaseTX and Half Duplex */
105 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
106 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
107 | AT91C_EMAC_SPD;
108 return TRUE;
109 }
110
111 if ((stat1 & BCM5221_10BASE_T_HD) && !(stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
112 /*set MII for 10BaseT and Half Duplex */
113 p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
114 return TRUE;
115 }
116 return FALSE;
117 }
118
119
120 /*
121 * Name:
122 * bcm5221_InitPhy
123 * Description:
124 * MAC starts checking its link by using parallel detection and
125 * Autonegotiation and the same is set in the MAC configuration registers
126 * Arguments:
127 * p_mac - pointer to struct AT91S_EMAC
128 * Return value:
129 * TRUE - if link status set succesfully
130 * FALSE - if link status not set
131 */
bcm5221_InitPhy(AT91PS_EMAC p_mac)132 unsigned char bcm5221_InitPhy (AT91PS_EMAC p_mac)
133 {
134 unsigned char ret = TRUE;
135 unsigned short IntValue;
136
137 at91rm9200_EmacEnableMDIO (p_mac);
138
139 if (!bcm5221_GetLinkSpeed (p_mac)) {
140 /* Try another time */
141 ret = bcm5221_GetLinkSpeed (p_mac);
142 }
143
144 /* Disable PHY Interrupts */
145 at91rm9200_EmacReadPhy (p_mac, BCM5221_INTR, &IntValue);
146 /* clear FDX LED and INTR Enable */
147 IntValue &= ~(BCM5221_FDX_LED | BCM5221_INTR_ENABLE);
148 /* set FDX, SPD, Link, INTR masks */
149 IntValue |= (BCM5221_FDX_MASK | BCM5221_SPD_MASK |
150 BCM5221_LINK_MASK | BCM5221_INTR_MASK);
151 at91rm9200_EmacWritePhy (p_mac, BCM5221_INTR, &IntValue);
152 at91rm9200_EmacDisableMDIO (p_mac);
153
154 return (ret);
155 }
156
157
158 /*
159 * Name:
160 * bcm5221_AutoNegotiate
161 * Description:
162 * MAC Autonegotiates with the partner status of same is set in the
163 * MAC configuration registers
164 * Arguments:
165 * dev - pointer to struct net_device
166 * Return value:
167 * TRUE - if link status set successfully
168 * FALSE - if link status not set
169 */
bcm5221_AutoNegotiate(AT91PS_EMAC p_mac,int * status)170 unsigned char bcm5221_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
171 {
172 unsigned short value;
173 unsigned short PhyAnar;
174 unsigned short PhyAnalpar;
175
176 /* Set bcm5221 control register */
177 if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
178 return FALSE;
179 value &= ~BCM5221_AUTONEG; /* remove autonegotiation enable */
180 value |= BCM5221_ISOLATE; /* Electrically isolate PHY */
181 if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
182 return FALSE;
183
184 /* Set the Auto_negotiation Advertisement Register */
185 /* MII advertising for 100BaseTxFD and HD, 10BaseTFD and HD, IEEE 802.3 */
186 PhyAnar = BCM5221_TX_FDX | BCM5221_TX_HDX |
187 BCM5221_10_FDX | BCM5221_10_HDX | BCM5221_AN_IEEE_802_3;
188 if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_ANAR, &PhyAnar))
189 return FALSE;
190
191 /* Read the Control Register */
192 if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
193 return FALSE;
194
195 value |= BCM5221_SPEED_SELECT | BCM5221_AUTONEG | BCM5221_DUPLEX_MODE;
196 if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
197 return FALSE;
198 /* Restart Auto_negotiation */
199 value |= BCM5221_RESTART_AUTONEG;
200 value &= ~BCM5221_ISOLATE;
201 if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
202 return FALSE;
203
204 /*check AutoNegotiate complete */
205 udelay (10000);
206 at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &value);
207 if (!(value & BCM5221_AUTONEG_COMP))
208 return FALSE;
209
210 /* Get the AutoNeg Link partner base page */
211 if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ANLPAR, &PhyAnalpar))
212 return FALSE;
213
214 if ((PhyAnar & BCM5221_TX_FDX) && (PhyAnalpar & BCM5221_TX_FDX)) {
215 /*set MII for 100BaseTX and Full Duplex */
216 p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
217 return TRUE;
218 }
219
220 if ((PhyAnar & BCM5221_10_FDX) && (PhyAnalpar & BCM5221_10_FDX)) {
221 /*set MII for 10BaseT and Full Duplex */
222 p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
223 ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
224 | AT91C_EMAC_FD;
225 return TRUE;
226 }
227 return FALSE;
228 }
229
230 #endif
231
232 #endif /* CONFIG_DRIVER_ETHER */
233