uboot/drivers/net/smc911x.c
<<
>>
Prefs
   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
  38#define mdelay(n)       udelay((n)*1000)
  39
  40static void smc911x_handle_mac_address(struct eth_device *dev)
  41{
  42        unsigned long addrh, addrl;
  43        uchar *m = dev->enetaddr;
  44
  45        addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
  46        addrh = m[4] | (m[5] << 8);
  47        smc911x_set_mac_csr(dev, ADDRL, addrl);
  48        smc911x_set_mac_csr(dev, ADDRH, addrh);
  49
  50        printf(DRIVERNAME ": MAC %pM\n", m);
  51}
  52
  53static int smc911x_miiphy_read(struct eth_device *dev,
  54                                u8 phy, u8 reg, u16 *val)
  55{
  56        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  57                ;
  58
  59        smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
  60                                MII_ACC_MII_BUSY);
  61
  62        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  63                ;
  64
  65        *val = smc911x_get_mac_csr(dev, MII_DATA);
  66
  67        return 0;
  68}
  69
  70static int smc911x_miiphy_write(struct eth_device *dev,
  71                                u8 phy, u8 reg, u16  val)
  72{
  73        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  74                ;
  75
  76        smc911x_set_mac_csr(dev, MII_DATA, val);
  77        smc911x_set_mac_csr(dev, MII_ACC,
  78                phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
  79
  80        while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  81                ;
  82        return 0;
  83}
  84
  85static int smc911x_phy_reset(struct eth_device *dev)
  86{
  87        u32 reg;
  88
  89        reg = smc911x_reg_read(dev, PMT_CTRL);
  90        reg &= ~0xfffff030;
  91        reg |= PMT_CTRL_PHY_RST;
  92        smc911x_reg_write(dev, PMT_CTRL, reg);
  93
  94        mdelay(100);
  95
  96        return 0;
  97}
  98
  99static void smc911x_phy_configure(struct eth_device *dev)
 100{
 101        int timeout;
 102        u16 status;
 103
 104        smc911x_phy_reset(dev);
 105
 106        smc911x_miiphy_write(dev, 1, PHY_BMCR, PHY_BMCR_RESET);
 107        mdelay(1);
 108        smc911x_miiphy_write(dev, 1, PHY_ANAR, 0x01e1);
 109        smc911x_miiphy_write(dev, 1, PHY_BMCR, PHY_BMCR_AUTON |
 110                                PHY_BMCR_RST_NEG);
 111
 112        timeout = 5000;
 113        do {
 114                mdelay(1);
 115                if ((timeout--) == 0)
 116                        goto err_out;
 117
 118                if (smc911x_miiphy_read(dev, 1, PHY_BMSR, &status) != 0)
 119                        goto err_out;
 120        } while (!(status & PHY_BMSR_LS));
 121
 122        printf(DRIVERNAME ": phy initialized\n");
 123
 124        return;
 125
 126err_out:
 127        printf(DRIVERNAME ": autonegotiation timed out\n");
 128}
 129
 130static void smc911x_enable(struct eth_device *dev)
 131{
 132        /* Enable TX */
 133        smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
 134
 135        smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
 136
 137        smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
 138
 139        /* no padding to start of packets */
 140        smc911x_reg_write(dev, RX_CFG, 0);
 141
 142        smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
 143                                MAC_CR_HBDIS);
 144
 145}
 146
 147static int smc911x_init(struct eth_device *dev, bd_t * bd)
 148{
 149        struct chip_id *id = dev->priv;
 150
 151        printf(DRIVERNAME ": detected %s controller\n", id->name);
 152
 153        smc911x_reset(dev);
 154
 155        /* Configure the PHY, initialize the link state */
 156        smc911x_phy_configure(dev);
 157
 158        smc911x_handle_mac_address(dev);
 159
 160        /* Turn on Tx + Rx */
 161        smc911x_enable(dev);
 162
 163        return 0;
 164}
 165
 166static int smc911x_send(struct eth_device *dev,
 167                        volatile void *packet, int length)
 168{
 169        u32 *data = (u32*)packet;
 170        u32 tmplen;
 171        u32 status;
 172
 173        smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
 174                                TX_CMD_A_INT_LAST_SEG | length);
 175        smc911x_reg_write(dev, TX_DATA_FIFO, length);
 176
 177        tmplen = (length + 3) / 4;
 178
 179        while (tmplen--)
 180                pkt_data_push(dev, TX_DATA_FIFO, *data++);
 181
 182        /* wait for transmission */
 183        while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
 184                                        TX_FIFO_INF_TSUSED) >> 16));
 185
 186        /* get status. Ignore 'no carrier' error, it has no meaning for
 187         * full duplex operation
 188         */
 189        status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
 190                        (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
 191                        TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
 192
 193        if (!status)
 194                return 0;
 195
 196        printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
 197                status & TX_STS_LOC ? "TX_STS_LOC " : "",
 198                status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
 199                status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
 200                status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
 201                status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
 202
 203        return -1;
 204}
 205
 206static void smc911x_halt(struct eth_device *dev)
 207{
 208        smc911x_reset(dev);
 209}
 210
 211static int smc911x_rx(struct eth_device *dev)
 212{
 213        u32 *data = (u32 *)NetRxPackets[0];
 214        u32 pktlen, tmplen;
 215        u32 status;
 216
 217        if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
 218                status = smc911x_reg_read(dev, RX_STATUS_FIFO);
 219                pktlen = (status & RX_STS_PKT_LEN) >> 16;
 220
 221                smc911x_reg_write(dev, RX_CFG, 0);
 222
 223                tmplen = (pktlen + 3) / 4;
 224                while (tmplen--)
 225                        *data++ = pkt_data_pull(dev, RX_DATA_FIFO);
 226
 227                if (status & RX_STS_ES)
 228                        printf(DRIVERNAME
 229                                ": dropped bad packet. Status: 0x%08x\n",
 230                                status);
 231                else
 232                        NetReceive(NetRxPackets[0], pktlen);
 233        }
 234
 235        return 0;
 236}
 237
 238int smc911x_initialize(u8 dev_num, int base_addr)
 239{
 240        unsigned long addrl, addrh;
 241        struct eth_device *dev;
 242
 243        dev = malloc(sizeof(*dev));
 244        if (!dev) {
 245                return -1;
 246        }
 247        memset(dev, 0, sizeof(*dev));
 248
 249        dev->iobase = base_addr;
 250
 251        /* Try to detect chip. Will fail if not present. */
 252        if (smc911x_detect_chip(dev)) {
 253                free(dev);
 254                return 0;
 255        }
 256
 257        addrh = smc911x_get_mac_csr(dev, ADDRH);
 258        addrl = smc911x_get_mac_csr(dev, ADDRL);
 259        if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
 260                /* address is obtained from optional eeprom */
 261                dev->enetaddr[0] = addrl;
 262                dev->enetaddr[1] = addrl >>  8;
 263                dev->enetaddr[2] = addrl >> 16;
 264                dev->enetaddr[3] = addrl >> 24;
 265                dev->enetaddr[4] = addrh;
 266                dev->enetaddr[5] = addrh >> 8;
 267        }
 268
 269        dev->init = smc911x_init;
 270        dev->halt = smc911x_halt;
 271        dev->send = smc911x_send;
 272        dev->recv = smc911x_rx;
 273        sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
 274
 275        eth_register(dev);
 276        return 1;
 277}
 278