blob: 1ded8f01d0cba308647d492284c1124b162d6881 [file] [log] [blame]
/*
* SMSC LAN9[12]1[567] Network driver
*
* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* 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 <common.h>
#include <command.h>
#include <net.h>
#include <miiphy.h>
#include "smc911x.h"
u32 pkt_data_pull(u32 addr) \
__attribute__ ((weak, alias ("smc911x_reg_read")));
void pkt_data_push(u32 addr, u32 val) \
__attribute__ ((weak, alias ("smc911x_reg_write")));
#define mdelay(n) udelay((n)*1000)
static int smx911x_handle_mac_address(bd_t *bd)
{
unsigned long addrh, addrl;
unsigned char *m = bd->bi_enetaddr;
/* if the environment has a valid mac address then use it */
if ((m[0] | m[1] | m[2] | m[3] | m[4] | m[5])) {
addrl = m[0] | m[1] << 8 | m[2] << 16 | m[3] << 24;
addrh = m[4] | m[5] << 8;
smc911x_set_mac_csr(ADDRH, addrh);
smc911x_set_mac_csr(ADDRL, addrl);
} else {
/* if not, try to get one from the eeprom */
addrh = smc911x_get_mac_csr(ADDRH);
addrl = smc911x_get_mac_csr(ADDRL);
m[0] = (addrl ) & 0xff;
m[1] = (addrl >> 8 ) & 0xff;
m[2] = (addrl >> 16 ) & 0xff;
m[3] = (addrl >> 24 ) & 0xff;
m[4] = (addrh ) & 0xff;
m[5] = (addrh >> 8 ) & 0xff;
/* we get 0xff when there is no eeprom connected */
if ((m[0] & m[1] & m[2] & m[3] & m[4] & m[5]) == 0xff) {
printf(DRIVERNAME ": no valid mac address in environment "
"and no eeprom found\n");
return -1;
}
}
printf(DRIVERNAME ": MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
m[0], m[1], m[2], m[3], m[4], m[5]);
return 0;
}
static int smc911x_miiphy_read(u8 phy, u8 reg, u16 *val)
{
while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
;
smc911x_set_mac_csr(MII_ACC, phy << 11 | reg << 6 | MII_ACC_MII_BUSY);
while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
;
*val = smc911x_get_mac_csr(MII_DATA);
return 0;
}
static int smc911x_miiphy_write(u8 phy, u8 reg, u16 val)
{
while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
;
smc911x_set_mac_csr(MII_DATA, val);
smc911x_set_mac_csr(MII_ACC,
phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
;
return 0;
}
static int smc911x_phy_reset(void)
{
u32 reg;
reg = smc911x_reg_read(PMT_CTRL);
reg &= ~0xfffff030;
reg |= PMT_CTRL_PHY_RST;
smc911x_reg_write(PMT_CTRL, reg);
mdelay(100);
return 0;
}
static void smc911x_phy_configure(void)
{
int timeout;
u16 status;
smc911x_phy_reset();
smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_RESET);
mdelay(1);
smc911x_miiphy_write(1, PHY_ANAR, 0x01e1);
smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
timeout = 5000;
do {
mdelay(1);
if ((timeout--) == 0)
goto err_out;
if (smc911x_miiphy_read(1, PHY_BMSR, &status) != 0)
goto err_out;
} while (!(status & PHY_BMSR_LS));
printf(DRIVERNAME ": phy initialized\n");
return;
err_out:
printf(DRIVERNAME ": autonegotiation timed out\n");
}
static void smc911x_enable(void)
{
/* Enable TX */
smc911x_reg_write(HW_CFG, 8 << 16 | HW_CFG_SF);
smc911x_reg_write(GPT_CFG, GPT_CFG_TIMER_EN | 10000);
smc911x_reg_write(TX_CFG, TX_CFG_TX_ON);
/* no padding to start of packets */
smc911x_reg_write(RX_CFG, 0);
smc911x_set_mac_csr(MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN | MAC_CR_HBDIS);
}
int eth_init(bd_t *bd)
{
printf(DRIVERNAME ": initializing\n");
if (smc911x_detect_chip())
goto err_out;
smc911x_reset();
/* Configure the PHY, initialize the link state */
smc911x_phy_configure();
if (smx911x_handle_mac_address(bd))
goto err_out;
/* Turn on Tx + Rx */
smc911x_enable();
return 0;
err_out:
return -1;
}
int eth_send(volatile void *packet, int length)
{
u32 *data = (u32*)packet;
u32 tmplen;
u32 status;
smc911x_reg_write(TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG | TX_CMD_A_INT_LAST_SEG | length);
smc911x_reg_write(TX_DATA_FIFO, length);
tmplen = (length + 3) / 4;
while (tmplen--)
pkt_data_push(TX_DATA_FIFO, *data++);
/* wait for transmission */
while (!((smc911x_reg_read(TX_FIFO_INF) & TX_FIFO_INF_TSUSED) >> 16));
/* get status. Ignore 'no carrier' error, it has no meaning for
* full duplex operation
*/
status = smc911x_reg_read(TX_STATUS_FIFO) & (TX_STS_LOC | TX_STS_LATE_COLL |
TX_STS_MANY_COLL | TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
if (!status)
return 0;
printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
status & TX_STS_LOC ? "TX_STS_LOC " : "",
status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
return -1;
}
void eth_halt(void)
{
smc911x_reset();
}
int eth_rx(void)
{
u32 *data = (u32 *)NetRxPackets[0];
u32 pktlen, tmplen;
u32 status;
if ((smc911x_reg_read(RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
status = smc911x_reg_read(RX_STATUS_FIFO);
pktlen = (status & RX_STS_PKT_LEN) >> 16;
smc911x_reg_write(RX_CFG, 0);
tmplen = (pktlen + 2+ 3) / 4;
while (tmplen--)
*data++ = pkt_data_pull(RX_DATA_FIFO);
if (status & RX_STS_ES)
printf(DRIVERNAME
": dropped bad packet. Status: 0x%08x\n",
status);
else
NetReceive(NetRxPackets[0], pktlen);
}
return 0;
}