LXR uboot/drivers/net/smc911x.c

   1/*
   2 * SMSC LAN9[12]1[567] Network driver
   3 *
   4 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
   5 *
   6 * See file CREDITS for list of people who contributed to this
   7 * project.
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License as
  11 * published by the Free Software Foundation; either version 2 of
  12 * the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22 * MA 02111-1307 USA
  23 */
  24
  25#include <common.h>
  26#include <command.h>
  27#include <malloc.h>
  28#include <net.h>
  29#include <miiphy.h>
  30
  31#include "smc911x.h"
  32
  33u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
  34        __attribute__ ((weak, alias ("smc911x_reg_read")));
  35void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
  36        __attribute__ ((weak, alias ("smc911x_reg_write")));
  37
  38static void smc911x_handle_mac_address(struct eth_device *dev)
  39{
  40        unsigned long addrh, addrl;
  41        uchar *m = dev->enetaddr;
  42
  43        addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
  44        addrh = m[4] | (m[5] << 8);
  45        smc911x_set_mac_csr(dev, ADDRL, addrl);
  46        smc911x_set_mac_csr(dev, ADDRH, addrh);
  47
  48        printf(DRIVERNAME ": MAC %pM\n", m);
  49}
  50
  51static int smc911x_eth_phy_read(struct eth_device *dev,
  52                                u8 phy, u8 reg, u16 *val)
  53{
  54        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  55                ;
  56
  57        smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
  58                                MII_ACC_MII_BUSY);
  59
  60        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  61                ;
  62
  63        *val = smc911x_get_mac_csr(dev, MII_DATA);
  64
  65        return 0;
  66}
  67
  68static int smc911x_eth_phy_write(struct eth_device *dev,
  69                                u8 phy, u8 reg, u16  val)
  70{
  71        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  72                ;
  73
  74        smc911x_set_mac_csr(dev, MII_DATA, val);
  75        smc911x_set_mac_csr(dev, MII_ACC,
  76                phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
  77
  78        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  79                ;
  80        return 0;
  81}
  82
  83static int smc911x_phy_reset(struct eth_device *dev)
  84{
  85        u32 reg;
  86
  87        reg = smc911x_reg_read(dev, PMT_CTRL);
  88        reg &= ~0xfffff030;
  89        reg |= PMT_CTRL_PHY_RST;
  90        smc911x_reg_write(dev, PMT_CTRL, reg);
  91
  92        mdelay(100);
  93
  94        return 0;
  95}
  96
  97static void smc911x_phy_configure(struct eth_device *dev)
  98{
  99        int timeout;
 100        u16 status;
 101
 102        smc911x_phy_reset(dev);
 103
 104        smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
 105        mdelay(1);
 106        smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
 107        smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
 108                                BMCR_ANRESTART);
 109
 110        timeout = 5000;
 111        do {
 112                mdelay(1);
 113                if ((timeout--) == 0)
 114                        goto err_out;
 115
 116                if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
 117                        goto err_out;
 118        } while (!(status & BMSR_LSTATUS));
 119
 120        printf(DRIVERNAME ": phy initialized\n");
 121
 122        return;
 123
 124err_out:
 125        printf(DRIVERNAME ": autonegotiation timed out\n");
 126}
 127
 128static void smc911x_enable(struct eth_device *dev)
 129{
 130        /* Enable TX */
 131        smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
 132
 133        smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
 134
 135        smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
 136
 137        /* no padding to start of packets */
 138        smc911x_reg_write(dev, RX_CFG, 0);
 139
 140        smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
 141                                MAC_CR_HBDIS);
 142
 143}
 144
 145static int smc911x_init(struct eth_device *dev, bd_t * bd)
 146{
 147        struct chip_id *id = dev->priv;
 148
 149        printf(DRIVERNAME ": detected %s controller\n", id->name);
 150
 151        smc911x_reset(dev);
 152
 153        /* Configure the PHY, initialize the link state */
 154        smc911x_phy_configure(dev);
 155
 156        smc911x_handle_mac_address(dev);
 157
 158        /* Turn on Tx + Rx */
 159        smc911x_enable(dev);
 160
 161        return 0;
 162}
 163
 164static int smc911x_send(struct eth_device *dev,
 165                        volatile void *packet, int length)
 166{
 167        u32 *data = (u32*)packet;
 168        u32 tmplen;
 169        u32 status;
 170
 171        smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
 172                                TX_CMD_A_INT_LAST_SEG | length);
 173        smc911x_reg_write(dev, TX_DATA_FIFO, length);
 174
 175        tmplen = (length + 3) / 4;
 176
 177        while (tmplen--)
 178                pkt_data_push(dev, TX_DATA_FIFO, *data++);
 179
 180        /* wait for transmission */
 181        while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
 182                                        TX_FIFO_INF_TSUSED) >> 16));
 183
 184        /* get status. Ignore 'no carrier' error, it has no meaning for
 185         * full duplex operation
 186         */
 187        status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
 188                        (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
 189                        TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
 190
 191        if (!status)
 192                return 0;
 193
 194        printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
 195                status & TX_STS_LOC ? "TX_STS_LOC " : "",
 196                status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
 197                status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
 198                status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
 199                status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
 200
 201        return -1;
 202}
 203
 204static void smc911x_halt(struct eth_device *dev)
 205{
 206        smc911x_reset(dev);
 207}
 208
 209static int smc911x_rx(struct eth_device *dev)
 210{
 211        u32 *data = (u32 *)NetRxPackets[0];
 212        u32 pktlen, tmplen;
 213        u32 status;
 214
 215        if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
 216                status = smc911x_reg_read(dev, RX_STATUS_FIFO);
 217                pktlen = (status & RX_STS_PKT_LEN) >> 16;
 218
 219                smc911x_reg_write(dev, RX_CFG, 0);
 220
 221                tmplen = (pktlen + 3) / 4;
 222                while (tmplen--)
 223                        *data++ = pkt_data_pull(dev, RX_DATA_FIFO);
 224
 225                if (status & RX_STS_ES)
 226                        printf(DRIVERNAME
 227                                ": dropped bad packet. Status: 0x%08x\n",
 228                                status);
 229                else
 230                        NetReceive(NetRxPackets[0], pktlen);
 231        }
 232
 233        return 0;
 234}
 235
 236#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 237/* wrapper for smc911x_eth_phy_read */
 238static int smc911x_miiphy_read(const char *devname, u8 phy, u8 reg, u16 *val)
 239{
 240        struct eth_device *dev = eth_get_dev_by_name(devname);
 241        if (dev)
 242                return smc911x_eth_phy_read(dev, phy, reg, val);
 243        return -1;
 244}
 245/* wrapper for smc911x_eth_phy_write */
 246static int smc911x_miiphy_write(const char *devname, u8 phy, u8 reg, u16 val)
 247{
 248        struct eth_device *dev = eth_get_dev_by_name(devname);
 249        if (dev)
 250                return smc911x_eth_phy_write(dev, phy, reg, val);
 251        return -1;
 252}
 253#endif
 254
 255int smc911x_initialize(u8 dev_num, int base_addr)
 256{
 257        unsigned long addrl, addrh;
 258        struct eth_device *dev;
 259
 260        dev = malloc(sizeof(*dev));
 261        if (!dev) {
 262                return -1;
 263        }
 264        memset(dev, 0, sizeof(*dev));
 265
 266        dev->iobase = base_addr;
 267
 268        /* Try to detect chip. Will fail if not present. */
 269        if (smc911x_detect_chip(dev)) {
 270                free(dev);
 271                return 0;
 272        }
 273
 274        addrh = smc911x_get_mac_csr(dev, ADDRH);
 275        addrl = smc911x_get_mac_csr(dev, ADDRL);
 276        if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
 277                /* address is obtained from optional eeprom */
 278                dev->enetaddr[0] = addrl;
 279                dev->enetaddr[1] = addrl >>  8;
 280                dev->enetaddr[2] = addrl >> 16;
 281                dev->enetaddr[3] = addrl >> 24;
 282                dev->enetaddr[4] = addrh;
 283                dev->enetaddr[5] = addrh >> 8;
 284        }
 285
 286        dev->init = smc911x_init;
 287        dev->halt = smc911x_halt;
 288        dev->send = smc911x_send;
 289        dev->recv = smc911x_rx;
 290        sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
 291
 292        eth_register(dev);
 293
 294#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 295        miiphy_register(dev->name, smc911x_miiphy_read, smc911x_miiphy_write);
 296#endif
 297
 298        return 1;
 299}
 300