source: SVN/rincon/u-boot/cpu/arm920t/at91rm9200/bcm5221.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 6.4 KB
Line 
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#include <bcm5221.h>
32
33#ifdef CONFIG_DRIVER_ETHER
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 */
48unsigned 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 */
76unsigned 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 */
132unsigned 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 */
170unsigned 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 */
Note: See TracBrowser for help on using the repository browser.