/* * 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); } static int smc911x_rx(struct eth_device *dev) { u32 *data = (u32 *)NetRxPackets[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 NetReceive(NetRxPackets[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; }