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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);
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(const char *devname, u8 phy, u8 reg, u16 *val)
{
struct eth_device *dev = eth_get_dev_by_name(devname);
if (dev)
return smc911x_eth_phy_read(dev, phy, reg, val);
return -1;
}
/* wrapper for smc911x_eth_phy_write */
static int smc911x_miiphy_write(const char *devname, u8 phy, u8 reg, u16 val)
{
struct eth_device *dev = eth_get_dev_by_name(devname);
if (dev)
return smc911x_eth_phy_write(dev, phy, reg, val);
return -1;
}
#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)
miiphy_register(dev->name, smc911x_miiphy_read, smc911x_miiphy_write);
#endif
return 1;
}
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