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  * 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
  17 u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
  18         __attribute__ ((weak, alias ("smc911x_reg_read")));
  19 void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
  20         __attribute__ ((weak, alias ("smc911x_reg_write")));
  21
  22 static 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
  35 static 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
  52 static 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
  67 static 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
  81 static 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
 108 err_out:
 109         printf(DRIVERNAME ": autonegotiation timed out\n");
 110 }
 111
 112 static 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
 129 static 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
 148 static 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
 187 static void smc911x_halt(struct eth_device *dev)
 188 {
 189         smc911x_reset(dev);
 190         smc911x_handle_mac_address(dev);
 191 }
 192
 193 static 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 */
 222 static 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 */
 236 static 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
 246 int 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 }