uboot/drivers/net/smc911x.c
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   1/*
   2 * SMSC LAN9[12]1[567] Network driver
   3 *
   4 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <common.h>
  10#include <command.h>
  11#include <malloc.h>
  12#include <net.h>
  13#include <miiphy.h>
  14
  15#include "smc911x.h"
  16
  17u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
  18        __attribute__ ((weak, alias ("smc911x_reg_read")));
  19void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
  20        __attribute__ ((weak, alias ("smc911x_reg_write")));
  21
  22static void smc911x_handle_mac_address(struct eth_device *dev)
  23{
  24        unsigned long addrh, addrl;
  25        uchar *m = dev->enetaddr;
  26
  27        addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
  28        addrh = m[4] | (m[5] << 8);
  29        smc911x_set_mac_csr(dev, ADDRL, addrl);
  30        smc911x_set_mac_csr(dev, ADDRH, addrh);
  31
  32        printf(DRIVERNAME ": MAC %pM\n", m);
  33}
  34
  35static int smc911x_eth_phy_read(struct eth_device *dev,
  36                                u8 phy, u8 reg, u16 *val)
  37{
  38        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  39                ;
  40
  41        smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
  42                                MII_ACC_MII_BUSY);
  43
  44        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  45                ;
  46
  47        *val = smc911x_get_mac_csr(dev, MII_DATA);
  48
  49        return 0;
  50}
  51
  52static int smc911x_eth_phy_write(struct eth_device *dev,
  53                                u8 phy, u8 reg, u16  val)
  54{
  55        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  56                ;
  57
  58        smc911x_set_mac_csr(dev, MII_DATA, val);
  59        smc911x_set_mac_csr(dev, MII_ACC,
  60                phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
  61
  62        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  63                ;
  64        return 0;
  65}
  66
  67static int smc911x_phy_reset(struct eth_device *dev)
  68{
  69        u32 reg;
  70
  71        reg = smc911x_reg_read(dev, PMT_CTRL);
  72        reg &= ~0xfffff030;
  73        reg |= PMT_CTRL_PHY_RST;
  74        smc911x_reg_write(dev, PMT_CTRL, reg);
  75
  76        mdelay(100);
  77
  78        return 0;
  79}
  80
  81static void smc911x_phy_configure(struct eth_device *dev)
  82{
  83        int timeout;
  84        u16 status;
  85
  86        smc911x_phy_reset(dev);
  87
  88        smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
  89        mdelay(1);
  90        smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
  91        smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
  92                                BMCR_ANRESTART);
  93
  94        timeout = 5000;
  95        do {
  96                mdelay(1);
  97                if ((timeout--) == 0)
  98                        goto err_out;
  99
 100                if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
 101                        goto err_out;
 102        } while (!(status & BMSR_LSTATUS));
 103
 104        printf(DRIVERNAME ": phy initialized\n");
 105
 106        return;
 107
 108err_out:
 109        printf(DRIVERNAME ": autonegotiation timed out\n");
 110}
 111
 112static void smc911x_enable(struct eth_device *dev)
 113{
 114        /* Enable TX */
 115        smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
 116
 117        smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
 118
 119        smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
 120
 121        /* no padding to start of packets */
 122        smc911x_reg_write(dev, RX_CFG, 0);
 123
 124        smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
 125                                MAC_CR_HBDIS);
 126
 127}
 128
 129static int smc911x_init(struct eth_device *dev, bd_t * bd)
 130{
 131        struct chip_id *id = dev->priv;
 132
 133        printf(DRIVERNAME ": detected %s controller\n", id->name);
 134
 135        smc911x_reset(dev);
 136
 137        /* Configure the PHY, initialize the link state */
 138        smc911x_phy_configure(dev);
 139
 140        smc911x_handle_mac_address(dev);
 141
 142        /* Turn on Tx + Rx */
 143        smc911x_enable(dev);
 144
 145        return 0;
 146}
 147
 148static int smc911x_send(struct eth_device *dev, void *packet, int length)
 149{
 150        u32 *data = (u32*)packet;
 151        u32 tmplen;
 152        u32 status;
 153
 154        smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
 155                                TX_CMD_A_INT_LAST_SEG | length);
 156        smc911x_reg_write(dev, TX_DATA_FIFO, length);
 157
 158        tmplen = (length + 3) / 4;
 159
 160        while (tmplen--)
 161                pkt_data_push(dev, TX_DATA_FIFO, *data++);
 162
 163        /* wait for transmission */
 164        while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
 165                                        TX_FIFO_INF_TSUSED) >> 16));
 166
 167        /* get status. Ignore 'no carrier' error, it has no meaning for
 168         * full duplex operation
 169         */
 170        status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
 171                        (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
 172                        TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
 173
 174        if (!status)
 175                return 0;
 176
 177        printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
 178                status & TX_STS_LOC ? "TX_STS_LOC " : "",
 179                status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
 180                status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
 181                status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
 182                status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
 183
 184        return -1;
 185}
 186
 187static void smc911x_halt(struct eth_device *dev)
 188{
 189        smc911x_reset(dev);
 190        smc911x_handle_mac_address(dev);
 191}
 192
 193static int smc911x_rx(struct eth_device *dev)
 194{
 195        u32 *data = (u32 *)net_rx_packets[0];
 196        u32 pktlen, tmplen;
 197        u32 status;
 198
 199        if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
 200                status = smc911x_reg_read(dev, RX_STATUS_FIFO);
 201                pktlen = (status & RX_STS_PKT_LEN) >> 16;
 202
 203                smc911x_reg_write(dev, RX_CFG, 0);
 204
 205                tmplen = (pktlen + 3) / 4;
 206                while (tmplen--)
 207                        *data++ = pkt_data_pull(dev, RX_DATA_FIFO);
 208
 209                if (status & RX_STS_ES)
 210                        printf(DRIVERNAME
 211                                ": dropped bad packet. Status: 0x%08x\n",
 212                                status);
 213                else
 214                        net_process_received_packet(net_rx_packets[0], pktlen);
 215        }
 216
 217        return 0;
 218}
 219
 220#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 221/* wrapper for smc911x_eth_phy_read */
 222static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
 223                               int reg)
 224{
 225        u16 val = 0;
 226        struct eth_device *dev = eth_get_dev_by_name(bus->name);
 227        if (dev) {
 228                int retval = smc911x_eth_phy_read(dev, phy, reg, &val);
 229                if (retval < 0)
 230                        return retval;
 231                return val;
 232        }
 233        return -ENODEV;
 234}
 235/* wrapper for smc911x_eth_phy_write */
 236static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
 237                                int reg, u16 val)
 238{
 239        struct eth_device *dev = eth_get_dev_by_name(bus->name);
 240        if (dev)
 241                return smc911x_eth_phy_write(dev, phy, reg, val);
 242        return -ENODEV;
 243}
 244#endif
 245
 246int smc911x_initialize(u8 dev_num, int base_addr)
 247{
 248        unsigned long addrl, addrh;
 249        struct eth_device *dev;
 250
 251        dev = malloc(sizeof(*dev));
 252        if (!dev) {
 253                return -1;
 254        }
 255        memset(dev, 0, sizeof(*dev));
 256
 257        dev->iobase = base_addr;
 258
 259        /* Try to detect chip. Will fail if not present. */
 260        if (smc911x_detect_chip(dev)) {
 261                free(dev);
 262                return 0;
 263        }
 264
 265        addrh = smc911x_get_mac_csr(dev, ADDRH);
 266        addrl = smc911x_get_mac_csr(dev, ADDRL);
 267        if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
 268                /* address is obtained from optional eeprom */
 269                dev->enetaddr[0] = addrl;
 270                dev->enetaddr[1] = addrl >>  8;
 271                dev->enetaddr[2] = addrl >> 16;
 272                dev->enetaddr[3] = addrl >> 24;
 273                dev->enetaddr[4] = addrh;
 274                dev->enetaddr[5] = addrh >> 8;
 275        }
 276
 277        dev->init = smc911x_init;
 278        dev->halt = smc911x_halt;
 279        dev->send = smc911x_send;
 280        dev->recv = smc911x_rx;
 281        sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
 282
 283        eth_register(dev);
 284
 285#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 286        int retval;
 287        struct mii_dev *mdiodev = mdio_alloc();
 288        if (!mdiodev)
 289                return -ENOMEM;
 290        strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
 291        mdiodev->read = smc911x_miiphy_read;
 292        mdiodev->write = smc911x_miiphy_write;
 293
 294        retval = mdio_register(mdiodev);
 295        if (retval < 0)
 296                return retval;
 297#endif
 298
 299        return 1;
 300}
 301