Add support for Cogent csb637
Patch by Anders Larsen, 29 Apr 2005
diff --git a/cpu/arm920t/at91rm9200/bcm5221.c b/cpu/arm920t/at91rm9200/bcm5221.c
new file mode 100644
index 0000000..6db1435
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/bcm5221.c
@@ -0,0 +1,232 @@
+/*
+ * 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)
+
+/*
+ * 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 */