source: SVN/rincon/u-boot/cpu/arm920t/at91rm9200/dm9161.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

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Signed-off-by: Tim Harvey <tharvey@…>

File size: 6.1 KB
Line 
1/*
2 * (C) Copyright 2003
3 * Author : Hamid Ikdoumi (Atmel)
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <at91rm9200_net.h>
25#include <net.h>
26#include <dm9161.h>
27
28#ifdef CONFIG_DRIVER_ETHER
29
30#if defined(CONFIG_CMD_NET)
31
32/*
33 * Name:
34 *      dm9161_IsPhyConnected
35 * Description:
36 *      Reads the 2 PHY ID registers
37 * Arguments:
38 *      p_mac - pointer to AT91S_EMAC struct
39 * Return value:
40 *      TRUE - if id read successfully
41 *      FALSE- if error
42 */
43unsigned int dm9161_IsPhyConnected (AT91PS_EMAC p_mac)
44{
45        unsigned short Id1, Id2;
46
47        at91rm9200_EmacEnableMDIO (p_mac);
48        at91rm9200_EmacReadPhy (p_mac, DM9161_PHYID1, &Id1);
49        at91rm9200_EmacReadPhy (p_mac, DM9161_PHYID2, &Id2);
50        at91rm9200_EmacDisableMDIO (p_mac);
51
52        if ((Id1 == (DM9161_PHYID1_OUI >> 6)) &&
53                ((Id2 >> 10) == (DM9161_PHYID1_OUI & DM9161_LSB_MASK)))
54                return TRUE;
55
56        return FALSE;
57}
58
59/*
60 * Name:
61 *      dm9161_GetLinkSpeed
62 * Description:
63 *      Link parallel detection status of MAC is checked and set in the
64 *      MAC configuration registers
65 * Arguments:
66 *      p_mac - pointer to MAC
67 * Return value:
68 *      TRUE - if link status set succesfully
69 *      FALSE - if link status not set
70 */
71UCHAR dm9161_GetLinkSpeed (AT91PS_EMAC p_mac)
72{
73        unsigned short stat1, stat2;
74
75        if (!at91rm9200_EmacReadPhy (p_mac, DM9161_BMSR, &stat1))
76                return FALSE;
77
78        if (!(stat1 & DM9161_LINK_STATUS))      /* link status up? */
79                return FALSE;
80
81        if (!at91rm9200_EmacReadPhy (p_mac, DM9161_DSCSR, &stat2))
82                return FALSE;
83
84        if ((stat1 & DM9161_100BASE_TX_FD) && (stat2 & DM9161_100FDX)) {
85                /*set Emac for 100BaseTX and Full Duplex  */
86                p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
87                return TRUE;
88        }
89
90        if ((stat1 & DM9161_10BASE_T_FD) && (stat2 & DM9161_10FDX)) {
91                /*set MII for 10BaseT and Full Duplex  */
92                p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
93                                ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
94                                | AT91C_EMAC_FD;
95                return TRUE;
96        }
97
98        if ((stat1 & DM9161_100BASE_TX_HD) && (stat2 & DM9161_100HDX)) {
99                /*set MII for 100BaseTX and Half Duplex  */
100                p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
101                                ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
102                                | AT91C_EMAC_SPD;
103                return TRUE;
104        }
105
106        if ((stat1 & DM9161_10BASE_T_HD) && (stat2 & DM9161_10HDX)) {
107                /*set MII for 10BaseT and Half Duplex  */
108                p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
109                return TRUE;
110        }
111        return FALSE;
112}
113
114
115/*
116 * Name:
117 *      dm9161_InitPhy
118 * Description:
119 *      MAC starts checking its link by using parallel detection and
120 *      Autonegotiation and the same is set in the MAC configuration registers
121 * Arguments:
122 *      p_mac - pointer to struct AT91S_EMAC
123 * Return value:
124 *      TRUE - if link status set succesfully
125 *      FALSE - if link status not set
126 */
127UCHAR dm9161_InitPhy (AT91PS_EMAC p_mac)
128{
129        UCHAR ret = TRUE;
130        unsigned short IntValue;
131
132        at91rm9200_EmacEnableMDIO (p_mac);
133
134        if (!dm9161_GetLinkSpeed (p_mac)) {
135                /* Try another time */
136                ret = dm9161_GetLinkSpeed (p_mac);
137        }
138
139        /* Disable PHY Interrupts */
140        at91rm9200_EmacReadPhy (p_mac, DM9161_MDINTR, &IntValue);
141        /* set FDX, SPD, Link, INTR masks */
142        IntValue |= (DM9161_FDX_MASK | DM9161_SPD_MASK |
143                        DM9161_LINK_MASK | DM9161_INTR_MASK);
144        at91rm9200_EmacWritePhy (p_mac, DM9161_MDINTR, &IntValue);
145        at91rm9200_EmacDisableMDIO (p_mac);
146
147        return (ret);
148}
149
150
151/*
152 * Name:
153 *      dm9161_AutoNegotiate
154 * Description:
155 *      MAC Autonegotiates with the partner status of same is set in the
156 *      MAC configuration registers
157 * Arguments:
158 *      dev - pointer to struct net_device
159 * Return value:
160 *      TRUE - if link status set successfully
161 *      FALSE - if link status not set
162 */
163UCHAR dm9161_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
164{
165        unsigned short value;
166        unsigned short PhyAnar;
167        unsigned short PhyAnalpar;
168
169        /* Set dm9161 control register */
170        if (!at91rm9200_EmacReadPhy (p_mac, DM9161_BMCR, &value))
171                return FALSE;
172        value &= ~DM9161_AUTONEG;       /* remove autonegotiation enable */
173        value |= DM9161_ISOLATE;        /* Electrically isolate PHY */
174        if (!at91rm9200_EmacWritePhy (p_mac, DM9161_BMCR, &value))
175                return FALSE;
176
177        /* Set the Auto_negotiation Advertisement Register      */
178        /* MII advertising for Next page, 100BaseTxFD and HD,   */
179        /* 10BaseTFD and HD, IEEE 802.3 */
180        PhyAnar = DM9161_NP | DM9161_TX_FDX | DM9161_TX_HDX |
181                        DM9161_10_FDX | DM9161_10_HDX | DM9161_AN_IEEE_802_3;
182        if (!at91rm9200_EmacWritePhy (p_mac, DM9161_ANAR, &PhyAnar))
183                return FALSE;
184
185        /* Read the Control Register     */
186        if (!at91rm9200_EmacReadPhy (p_mac, DM9161_BMCR, &value))
187                return FALSE;
188
189        value |= DM9161_SPEED_SELECT | DM9161_AUTONEG | DM9161_DUPLEX_MODE;
190        if (!at91rm9200_EmacWritePhy (p_mac, DM9161_BMCR, &value))
191                return FALSE;
192        /* Restart Auto_negotiation  */
193        value |= DM9161_RESTART_AUTONEG;
194        value &= ~DM9161_ISOLATE;
195        if (!at91rm9200_EmacWritePhy (p_mac, DM9161_BMCR, &value))
196                return FALSE;
197
198        /*check AutoNegotiate complete */
199        udelay (10000);
200        at91rm9200_EmacReadPhy (p_mac, DM9161_BMSR, &value);
201        if (!(value & DM9161_AUTONEG_COMP))
202                return FALSE;
203
204        /* Get the AutoNeg Link partner base page */
205        if (!at91rm9200_EmacReadPhy (p_mac, DM9161_ANLPAR, &PhyAnalpar))
206                return FALSE;
207
208        if ((PhyAnar & DM9161_TX_FDX) && (PhyAnalpar & DM9161_TX_FDX)) {
209                /*set MII for 100BaseTX and Full Duplex  */
210                p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
211                return TRUE;
212        }
213
214        if ((PhyAnar & DM9161_10_FDX) && (PhyAnalpar & DM9161_10_FDX)) {
215                /*set MII for 10BaseT and Full Duplex  */
216                p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
217                                ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
218                                | AT91C_EMAC_FD;
219                return TRUE;
220        }
221        return FALSE;
222}
223
224#endif
225
226#endif  /* CONFIG_DRIVER_ETHER */
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