cpu/arm920t/at91rm9200/lxt972.c

   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 <lxt971a.h>
  33
  34 #ifdef CONFIG_DRIVER_ETHER
  35
  36 #if defined(CONFIG_CMD_NET)
  37
  38 /*
  39  * Name:
  40  *      lxt972_IsPhyConnected
  41  * Description:
  42  *      Reads the 2 PHY ID registers
  43  * Arguments:
  44  *      p_mac - pointer to AT91S_EMAC struct
  45  * Return value:
  46  *      TRUE - if id read successfully
  47  *      FALSE- if error
  48  */
  49 unsigned int lxt972_IsPhyConnected (AT91PS_EMAC p_mac)
  50 {
  51         unsigned short Id1, Id2;
  52
  53         at91rm9200_EmacEnableMDIO (p_mac);
  54         at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_ID1, &Id1);
  55         at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_ID2, &Id2);
  56         at91rm9200_EmacDisableMDIO (p_mac);
  57
  58         if ((Id1 == (0x0013)) && ((Id2  & 0xFFF0) == 0x78E0))
  59                 return TRUE;
  60
  61         return FALSE;
  62 }
  63
  64 /*
  65  * Name:
  66  *      lxt972_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  */
  76 UCHAR lxt972_GetLinkSpeed (AT91PS_EMAC p_mac)
  77 {
  78         unsigned short stat1;
  79
  80         if (!at91rm9200_EmacReadPhy (p_mac, PHY_LXT971_STAT2, &stat1))
  81                 return FALSE;
  82
  83         if (!(stat1 & PHY_LXT971_STAT2_LINK))   /* link status up? */
  84                 return FALSE;
  85
  86         if (stat1 & PHY_LXT971_STAT2_100BTX) {
  87
  88                 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
  89
  90                         /*set Emac for 100BaseTX and Full Duplex  */
  91                         p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
  92                 } else {
  93
  94                         /*set Emac for 100BaseTX and Half Duplex  */
  95                         p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
  96                                         ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
  97                                         | AT91C_EMAC_SPD;
  98                 }
  99
 100                 return TRUE;
 101
 102         } else {
 103
 104                 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
 105
 106                         /*set MII for 10BaseT and Full Duplex  */
 107                         p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
 108                                         ~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
 109                                         | AT91C_EMAC_FD;
 110                 } else {
 111
 112                         /*set MII for 10BaseT and Half Duplex  */
 113                         p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
 114                 }
 115
 116                 return TRUE;
 117         }
 118
 119         return FALSE;
 120 }
 121
 122
 123 /*
 124  * Name:
 125  *      lxt972_InitPhy
 126  * Description:
 127  *      MAC starts checking its link by using parallel detection and
 128  *      Autonegotiation and the same is set in the MAC configuration registers
 129  * Arguments:
 130  *      p_mac - pointer to struct AT91S_EMAC
 131  * Return value:
 132  *      TRUE - if link status set succesfully
 133  *      FALSE - if link status not set
 134  */
 135 UCHAR lxt972_InitPhy (AT91PS_EMAC p_mac)
 136 {
 137         UCHAR ret = TRUE;
 138
 139         at91rm9200_EmacEnableMDIO (p_mac);
 140
 141         if (!lxt972_GetLinkSpeed (p_mac)) {
 142                 /* Try another time */
 143                 ret = lxt972_GetLinkSpeed (p_mac);
 144         }
 145
 146         /* Disable PHY Interrupts */
 147         at91rm9200_EmacWritePhy (p_mac, PHY_LXT971_INT_ENABLE, 0);
 148
 149         at91rm9200_EmacDisableMDIO (p_mac);
 150
 151         return (ret);
 152 }
 153
 154
 155 /*
 156  * Name:
 157  *      lxt972_AutoNegotiate
 158  * Description:
 159  *      MAC Autonegotiates with the partner status of same is set in the
 160  *      MAC configuration registers
 161  * Arguments:
 162  *      dev - pointer to struct net_device
 163  * Return value:
 164  *      TRUE - if link status set successfully
 165  *      FALSE - if link status not set
 166  */
 167 UCHAR lxt972_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
 168 {
 169         unsigned short value;
 170
 171         /* Set lxt972 control register */
 172         if (!at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_CTRL, &value))
 173                 return FALSE;
 174
 175         /* Restart Auto_negotiation  */
 176         value |= PHY_COMMON_CTRL_RES_AUTO;
 177         if (!at91rm9200_EmacWritePhy (p_mac, PHY_COMMON_CTRL, &value))
 178                 return FALSE;
 179
 180         /*check AutoNegotiate complete */
 181         udelay (10000);
 182         at91rm9200_EmacReadPhy (p_mac, PHY_COMMON_STAT, &value);
 183         if (!(value & PHY_COMMON_STAT_AN_COMP))
 184                 return FALSE;
 185
 186         return (lxt972_GetLinkSpeed (p_mac));
 187 }
 188
 189 #endif
 190
 191 #endif  /* CONFIG_DRIVER_ETHER */