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https://github.com/AsahiLinux/u-boot
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6f6cf0083f
Invert the logic in the aforementioned functions to reduce indent, no functional change. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Joe Hershberger <joe.hershberger@ni.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
297 lines
6.5 KiB
C
297 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* SMSC LAN9[12]1[567] Network driver
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*
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* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <net.h>
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#include <miiphy.h>
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#include "smc911x.h"
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static void smc911x_handle_mac_address(struct eth_device *dev)
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{
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unsigned long addrh, addrl;
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uchar *m = dev->enetaddr;
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addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
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addrh = m[4] | (m[5] << 8);
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smc911x_set_mac_csr(dev, ADDRL, addrl);
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smc911x_set_mac_csr(dev, ADDRH, addrh);
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printf(DRIVERNAME ": MAC %pM\n", m);
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}
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static int smc911x_eth_phy_read(struct eth_device *dev,
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u8 phy, u8 reg, u16 *val)
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{
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while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
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;
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smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
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MII_ACC_MII_BUSY);
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while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
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;
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*val = smc911x_get_mac_csr(dev, MII_DATA);
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return 0;
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}
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static int smc911x_eth_phy_write(struct eth_device *dev,
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u8 phy, u8 reg, u16 val)
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{
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while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
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;
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smc911x_set_mac_csr(dev, MII_DATA, val);
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smc911x_set_mac_csr(dev, MII_ACC,
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phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
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while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
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;
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return 0;
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}
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static int smc911x_phy_reset(struct eth_device *dev)
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{
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u32 reg;
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reg = smc911x_reg_read(dev, PMT_CTRL);
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reg &= ~0xfffff030;
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reg |= PMT_CTRL_PHY_RST;
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smc911x_reg_write(dev, PMT_CTRL, reg);
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mdelay(100);
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return 0;
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}
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static void smc911x_phy_configure(struct eth_device *dev)
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{
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int timeout;
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u16 status;
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smc911x_phy_reset(dev);
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smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
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mdelay(1);
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smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
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smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
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BMCR_ANRESTART);
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timeout = 5000;
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do {
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mdelay(1);
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if ((timeout--) == 0)
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goto err_out;
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if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
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goto err_out;
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} while (!(status & BMSR_LSTATUS));
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printf(DRIVERNAME ": phy initialized\n");
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return;
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err_out:
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printf(DRIVERNAME ": autonegotiation timed out\n");
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}
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static void smc911x_enable(struct eth_device *dev)
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{
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/* Enable TX */
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smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
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smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
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smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
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/* no padding to start of packets */
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smc911x_reg_write(dev, RX_CFG, 0);
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smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
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MAC_CR_HBDIS);
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}
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static int smc911x_init(struct eth_device *dev, bd_t * bd)
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{
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struct chip_id *id = dev->priv;
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printf(DRIVERNAME ": detected %s controller\n", id->name);
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smc911x_reset(dev);
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/* Configure the PHY, initialize the link state */
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smc911x_phy_configure(dev);
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smc911x_handle_mac_address(dev);
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/* Turn on Tx + Rx */
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smc911x_enable(dev);
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return 0;
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}
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static int smc911x_send(struct eth_device *dev, void *packet, int length)
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{
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u32 *data = (u32*)packet;
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u32 tmplen;
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u32 status;
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smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
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TX_CMD_A_INT_LAST_SEG | length);
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smc911x_reg_write(dev, TX_DATA_FIFO, length);
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tmplen = (length + 3) / 4;
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while (tmplen--)
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smc911x_reg_write(dev, TX_DATA_FIFO, *data++);
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/* wait for transmission */
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while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
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TX_FIFO_INF_TSUSED) >> 16));
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/* get status. Ignore 'no carrier' error, it has no meaning for
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* full duplex operation
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*/
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status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
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(TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
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TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
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if (!status)
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return 0;
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printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
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status & TX_STS_LOC ? "TX_STS_LOC " : "",
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status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
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status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
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status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
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status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
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return -1;
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}
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static void smc911x_halt(struct eth_device *dev)
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{
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smc911x_reset(dev);
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smc911x_handle_mac_address(dev);
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}
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static int smc911x_recv(struct eth_device *dev)
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{
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u32 *data = (u32 *)net_rx_packets[0];
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u32 pktlen, tmplen;
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u32 status;
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if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
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status = smc911x_reg_read(dev, RX_STATUS_FIFO);
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pktlen = (status & RX_STS_PKT_LEN) >> 16;
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smc911x_reg_write(dev, RX_CFG, 0);
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tmplen = (pktlen + 3) / 4;
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while (tmplen--)
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*data++ = smc911x_reg_read(dev, RX_DATA_FIFO);
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if (status & RX_STS_ES)
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printf(DRIVERNAME
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": dropped bad packet. Status: 0x%08x\n",
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status);
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else
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net_process_received_packet(net_rx_packets[0], pktlen);
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}
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return 0;
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}
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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/* wrapper for smc911x_eth_phy_read */
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static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
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int reg)
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{
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struct eth_device *dev = eth_get_dev_by_name(bus->name);
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u16 val = 0;
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int ret;
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if (!dev)
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return -ENODEV;
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ret = smc911x_eth_phy_read(dev, phy, reg, &val);
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if (ret < 0)
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return ret;
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return val;
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}
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/* wrapper for smc911x_eth_phy_write */
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static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
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int reg, u16 val)
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{
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struct eth_device *dev = eth_get_dev_by_name(bus->name);
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if (!dev)
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return -ENODEV;
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return smc911x_eth_phy_write(dev, phy, reg, val);
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}
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#endif
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int smc911x_initialize(u8 dev_num, int base_addr)
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{
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unsigned long addrl, addrh;
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struct eth_device *dev;
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dev = calloc(1, sizeof(*dev));
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if (!dev)
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return -ENOMEM;
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dev->iobase = base_addr;
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/* Try to detect chip. Will fail if not present. */
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if (smc911x_detect_chip(dev)) {
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free(dev);
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return 0;
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}
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addrh = smc911x_get_mac_csr(dev, ADDRH);
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addrl = smc911x_get_mac_csr(dev, ADDRL);
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if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
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/* address is obtained from optional eeprom */
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dev->enetaddr[0] = addrl;
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dev->enetaddr[1] = addrl >> 8;
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dev->enetaddr[2] = addrl >> 16;
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dev->enetaddr[3] = addrl >> 24;
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dev->enetaddr[4] = addrh;
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dev->enetaddr[5] = addrh >> 8;
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}
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dev->init = smc911x_init;
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dev->halt = smc911x_halt;
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dev->send = smc911x_send;
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dev->recv = smc911x_recv;
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sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
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eth_register(dev);
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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int retval;
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struct mii_dev *mdiodev = mdio_alloc();
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if (!mdiodev)
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return -ENOMEM;
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strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
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mdiodev->read = smc911x_miiphy_read;
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mdiodev->write = smc911x_miiphy_write;
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retval = mdio_register(mdiodev);
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if (retval < 0)
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return retval;
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#endif
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return 1;
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}
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