u-boot/drivers/net/smc911x.c

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/*
* SMSC LAN9[12]1[567] Network driver
*
* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <net.h>
#include <miiphy.h>
#include "smc911x.h"
u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
__attribute__ ((weak, alias ("smc911x_reg_read")));
void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
__attribute__ ((weak, alias ("smc911x_reg_write")));
static void smc911x_handle_mac_address(struct eth_device *dev)
{
unsigned long addrh, addrl;
uchar *m = dev->enetaddr;
addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
addrh = m[4] | (m[5] << 8);
smc911x_set_mac_csr(dev, ADDRL, addrl);
smc911x_set_mac_csr(dev, ADDRH, addrh);
printf(DRIVERNAME ": MAC %pM\n", m);
}
static int smc911x_eth_phy_read(struct eth_device *dev,
u8 phy, u8 reg, u16 *val)
{
while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
;
smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
MII_ACC_MII_BUSY);
while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
;
*val = smc911x_get_mac_csr(dev, MII_DATA);
return 0;
}
static int smc911x_eth_phy_write(struct eth_device *dev,
u8 phy, u8 reg, u16 val)
{
while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
;
smc911x_set_mac_csr(dev, MII_DATA, val);
smc911x_set_mac_csr(dev, MII_ACC,
phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
;
return 0;
}
static int smc911x_phy_reset(struct eth_device *dev)
{
u32 reg;
reg = smc911x_reg_read(dev, PMT_CTRL);
reg &= ~0xfffff030;
reg |= PMT_CTRL_PHY_RST;
smc911x_reg_write(dev, PMT_CTRL, reg);
mdelay(100);
return 0;
}
static void smc911x_phy_configure(struct eth_device *dev)
{
int timeout;
u16 status;
smc911x_phy_reset(dev);
smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
mdelay(1);
smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
BMCR_ANRESTART);
timeout = 5000;
do {
mdelay(1);
if ((timeout--) == 0)
goto err_out;
if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
goto err_out;
} while (!(status & BMSR_LSTATUS));
printf(DRIVERNAME ": phy initialized\n");
return;
err_out:
printf(DRIVERNAME ": autonegotiation timed out\n");
}
static void smc911x_enable(struct eth_device *dev)
{
/* Enable TX */
smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
/* no padding to start of packets */
smc911x_reg_write(dev, RX_CFG, 0);
smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
MAC_CR_HBDIS);
}
static int smc911x_init(struct eth_device *dev, bd_t * bd)
{
struct chip_id *id = dev->priv;
printf(DRIVERNAME ": detected %s controller\n", id->name);
smc911x_reset(dev);
/* Configure the PHY, initialize the link state */
smc911x_phy_configure(dev);
smc911x_handle_mac_address(dev);
/* Turn on Tx + Rx */
smc911x_enable(dev);
return 0;
}
static int smc911x_send(struct eth_device *dev, void *packet, int length)
{
u32 *data = (u32*)packet;
u32 tmplen;
u32 status;
smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
TX_CMD_A_INT_LAST_SEG | length);
smc911x_reg_write(dev, TX_DATA_FIFO, length);
tmplen = (length + 3) / 4;
while (tmplen--)
pkt_data_push(dev, TX_DATA_FIFO, *data++);
/* wait for transmission */
while (!((smc911x_reg_read(dev, 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(dev, 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;
}
static void smc911x_halt(struct eth_device *dev)
{
smc911x_reset(dev);
smc911x_handle_mac_address(dev);
}
static int smc911x_rx(struct eth_device *dev)
{
u32 *data = (u32 *)net_rx_packets[0];
u32 pktlen, tmplen;
u32 status;
if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
status = smc911x_reg_read(dev, RX_STATUS_FIFO);
pktlen = (status & RX_STS_PKT_LEN) >> 16;
smc911x_reg_write(dev, RX_CFG, 0);
smc911x driver frame alignment patch SMSC911x chips have alignment function to allow frame payload data (which comes after 14-bytes ethernet header) to be aligned at some boundary when reading it from fifo (usually - 4 bytes boundary). This is done by inserting fake zeros bytes BEFORE actual frame data when reading from SMSC's fifo. This function controlled by RX_CFG register. There are bits that represents amount of fake bytes to be inserted. Linux uses alignment of 4 bytes. Ethernet frame header is 14 bytes long, so we need to add 2 fake bytes to get payload data aligned at 4-bytes boundary. Linux driver does this by adding IP_ALIGNMENT constant (defined at skb.h) when calculating fifo data length. All network subsystem of Linux uses this constant too when calculating different offsets. But u-boot does not use any packet data alignment, so we don't need to add anything when calculating fifo data length. Moreover, driver zeros the RX_CFG register just one line up, so chip does not insert any fake data at the beginig. So calculated data length is always bigger by 1 word. It seems that at almost every packet read we get an underflow condition at fifo and possible corruption of data. Especially at continuous transfers, such as tftp. Just after removing this magic addition, I've got tftp transfer speed as it aught to be at 100Mbps. It was really slow before. It seems that fifo underflow occurs only when using byte packing on 32-bit blackfin bus (may be because of very small delay between reads). Signed-off-by: Valentin Yakovenkov <yakovenkov@niistt.ru> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
2010-04-23 05:40:23 +00:00
tmplen = (pktlen + 3) / 4;
while (tmplen--)
*data++ = pkt_data_pull(dev, RX_DATA_FIFO);
if (status & RX_STS_ES)
printf(DRIVERNAME
": dropped bad packet. Status: 0x%08x\n",
status);
else
net_process_received_packet(net_rx_packets[0], pktlen);
}
return 0;
}
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
/* wrapper for smc911x_eth_phy_read */
static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
int reg)
{
u16 val = 0;
struct eth_device *dev = eth_get_dev_by_name(bus->name);
if (dev) {
int retval = smc911x_eth_phy_read(dev, phy, reg, &val);
if (retval < 0)
return retval;
return val;
}
return -ENODEV;
}
/* wrapper for smc911x_eth_phy_write */
static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
int reg, u16 val)
{
struct eth_device *dev = eth_get_dev_by_name(bus->name);
if (dev)
return smc911x_eth_phy_write(dev, phy, reg, val);
return -ENODEV;
}
#endif
int smc911x_initialize(u8 dev_num, int base_addr)
{
unsigned long addrl, addrh;
struct eth_device *dev;
dev = malloc(sizeof(*dev));
if (!dev) {
return -1;
}
memset(dev, 0, sizeof(*dev));
dev->iobase = base_addr;
/* Try to detect chip. Will fail if not present. */
if (smc911x_detect_chip(dev)) {
free(dev);
return 0;
}
addrh = smc911x_get_mac_csr(dev, ADDRH);
addrl = smc911x_get_mac_csr(dev, ADDRL);
if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
/* address is obtained from optional eeprom */
dev->enetaddr[0] = addrl;
dev->enetaddr[1] = addrl >> 8;
dev->enetaddr[2] = addrl >> 16;
dev->enetaddr[3] = addrl >> 24;
dev->enetaddr[4] = addrh;
dev->enetaddr[5] = addrh >> 8;
}
dev->init = smc911x_init;
dev->halt = smc911x_halt;
dev->send = smc911x_send;
dev->recv = smc911x_rx;
sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
eth_register(dev);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
int retval;
struct mii_dev *mdiodev = mdio_alloc();
if (!mdiodev)
return -ENOMEM;
strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
mdiodev->read = smc911x_miiphy_read;
mdiodev->write = smc911x_miiphy_write;
retval = mdio_register(mdiodev);
if (retval < 0)
return retval;
#endif
return 1;
}