drivers/net/kirkwood_egiga.c

   1 /*
   2  * (C) Copyright 2009
   3  * Marvell Semiconductor <www.marvell.com>
   4  * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
   5  *
   6  * (C) Copyright 2003
   7  * Ingo Assmus <ingo.assmus@keymile.com>
   8  *
   9  * based on - Driver for MV64360X ethernet ports
  10  * Copyright (C) 2002 rabeeh@galileo.co.il
  11  *
  12  * See file CREDITS for list of people who contributed to this
  13  * project.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of
  18  * the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  28  * MA 02110-1301 USA
  29  */
  30
  31 #include <common.h>
  32 #include <net.h>
  33 #include <malloc.h>
  34 #include <miiphy.h>
  35 #include <asm/errno.h>
  36 #include <asm/types.h>
  37 #include <asm/byteorder.h>
  38 #include <asm/arch/kirkwood.h>
  39 #include "kirkwood_egiga.h"
  40
  41 #define KIRKWOOD_PHY_ADR_REQUEST 0xee
  42
  43 /*
  44  * smi_reg_read - miiphy_read callback function.
  45  *
  46  * Returns 16bit phy register value, or 0xffff on error
  47  */
  48 static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
  49 {
  50         struct eth_device *dev = eth_get_dev_by_name(devname);
  51         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
  52         struct kwgbe_registers *regs = dkwgbe->regs;
  53         u32 smi_reg;
  54         u32 timeout;
  55
  56         /* Phyadr read request */
  57         if (phy_adr == KIRKWOOD_PHY_ADR_REQUEST &&
  58                         reg_ofs == KIRKWOOD_PHY_ADR_REQUEST) {
  59                 /* */
  60                 *data = (u16) (KWGBEREG_RD(regs->phyadr) & PHYADR_MASK);
  61                 return 0;
  62         }
  63         /* check parameters */
  64         if (phy_adr > PHYADR_MASK) {
  65                 printf("Err..(%s) Invalid PHY address %d\n",
  66                         __FUNCTION__, phy_adr);
  67                 return -EFAULT;
  68         }
  69         if (reg_ofs > PHYREG_MASK) {
  70                 printf("Err..(%s) Invalid register offset %d\n",
  71                         __FUNCTION__, reg_ofs);
  72                 return -EFAULT;
  73         }
  74
  75         timeout = KWGBE_PHY_SMI_TIMEOUT;
  76         /* wait till the SMI is not busy */
  77         do {
  78                 /* read smi register */
  79                 smi_reg = KWGBEREG_RD(regs->smi);
  80                 if (timeout-- == 0) {
  81                         printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
  82                         return -EFAULT;
  83                 }
  84         } while (smi_reg & KWGBE_PHY_SMI_BUSY_MASK);
  85
  86         /* fill the phy address and regiser offset and read opcode */
  87         smi_reg = (phy_adr << KWGBE_PHY_SMI_DEV_ADDR_OFFS)
  88                 | (reg_ofs << KWGBE_SMI_REG_ADDR_OFFS)
  89                 | KWGBE_PHY_SMI_OPCODE_READ;
  90
  91         /* write the smi register */
  92         KWGBEREG_WR(regs->smi, smi_reg);
  93
  94         /*wait till read value is ready */
  95         timeout = KWGBE_PHY_SMI_TIMEOUT;
  96
  97         do {
  98                 /* read smi register */
  99                 smi_reg = KWGBEREG_RD(regs->smi);
 100                 if (timeout-- == 0) {
 101                         printf("Err..(%s) SMI read ready timeout\n",
 102                                 __FUNCTION__);
 103                         return -EFAULT;
 104                 }
 105         } while (!(smi_reg & KWGBE_PHY_SMI_READ_VALID_MASK));
 106
 107         /* Wait for the data to update in the SMI register */
 108         for (timeout = 0; timeout < KWGBE_PHY_SMI_TIMEOUT; timeout++) ;
 109
 110         *data = (u16) (KWGBEREG_RD(regs->smi) & KWGBE_PHY_SMI_DATA_MASK);
 111
 112         debug("%s:(adr %d, off %d) value= %04x\n", __FUNCTION__, phy_adr,
 113                 reg_ofs, *data);
 114
 115         return 0;
 116 }
 117
 118 /*
 119  * smi_reg_write - imiiphy_write callback function.
 120  *
 121  * Returns 0 if write succeed, -EINVAL on bad parameters
 122  * -ETIME on timeout
 123  */
 124 static int smi_reg_write(char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
 125 {
 126         struct eth_device *dev = eth_get_dev_by_name(devname);
 127         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
 128         struct kwgbe_registers *regs = dkwgbe->regs;
 129         u32 smi_reg;
 130         u32 timeout;
 131
 132         /* Phyadr write request*/
 133         if (phy_adr == KIRKWOOD_PHY_ADR_REQUEST &&
 134                         reg_ofs == KIRKWOOD_PHY_ADR_REQUEST) {
 135                 KWGBEREG_WR(regs->phyadr, data);
 136                 return 0;
 137         }
 138
 139         /* check parameters */
 140         if (phy_adr > PHYADR_MASK) {
 141                 printf("Err..(%s) Invalid phy address\n", __FUNCTION__);
 142                 return -EINVAL;
 143         }
 144         if (reg_ofs > PHYREG_MASK) {
 145                 printf("Err..(%s) Invalid register offset\n", __FUNCTION__);
 146                 return -EINVAL;
 147         }
 148
 149         /* wait till the SMI is not busy */
 150         timeout = KWGBE_PHY_SMI_TIMEOUT;
 151         do {
 152                 /* read smi register */
 153                 smi_reg = KWGBEREG_RD(regs->smi);
 154                 if (timeout-- == 0) {
 155                         printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
 156                         return -ETIME;
 157                 }
 158         } while (smi_reg & KWGBE_PHY_SMI_BUSY_MASK);
 159
 160         /* fill the phy addr and reg offset and write opcode and data */
 161         smi_reg = (data << KWGBE_PHY_SMI_DATA_OFFS);
 162         smi_reg |= (phy_adr << KWGBE_PHY_SMI_DEV_ADDR_OFFS)
 163                 | (reg_ofs << KWGBE_SMI_REG_ADDR_OFFS);
 164         smi_reg &= ~KWGBE_PHY_SMI_OPCODE_READ;
 165
 166         /* write the smi register */
 167         KWGBEREG_WR(regs->smi, smi_reg);
 168
 169         return 0;
 170 }
 171
 172 /* Stop and checks all queues */
 173 static void stop_queue(u32 * qreg)
 174 {
 175         u32 reg_data;
 176
 177         reg_data = readl(qreg);
 178
 179         if (reg_data & 0xFF) {
 180                 /* Issue stop command for active channels only */
 181                 writel((reg_data << 8), qreg);
 182
 183                 /* Wait for all queue activity to terminate. */
 184                 do {
 185                         /*
 186                          * Check port cause register that all queues
 187                          * are stopped
 188                          */
 189                         reg_data = readl(qreg);
 190                 }
 191                 while (reg_data & 0xFF);
 192         }
 193 }
 194
 195 /*
 196  * set_access_control - Config address decode parameters for Ethernet unit
 197  *
 198  * This function configures the address decode parameters for the Gigabit
 199  * Ethernet Controller according the given parameters struct.
 200  *
 201  * @regs        Register struct pointer.
 202  * @param       Address decode parameter struct.
 203  */
 204 static void set_access_control(struct kwgbe_registers *regs,
 205                                 struct kwgbe_winparam *param)
 206 {
 207         u32 access_prot_reg;
 208
 209         /* Set access control register */
 210         access_prot_reg = KWGBEREG_RD(regs->epap);
 211         /* clear window permission */
 212         access_prot_reg &= (~(3 << (param->win * 2)));
 213         access_prot_reg |= (param->access_ctrl << (param->win * 2));
 214         KWGBEREG_WR(regs->epap, access_prot_reg);
 215
 216         /* Set window Size reg (SR) */
 217         KWGBEREG_WR(regs->barsz[param->win].size,
 218                         (((param->size / 0x10000) - 1) << 16));
 219
 220         /* Set window Base address reg (BA) */
 221         KWGBEREG_WR(regs->barsz[param->win].bar,
 222                         (param->target | param->attrib | param->base_addr));
 223         /* High address remap reg (HARR) */
 224         if (param->win < 4)
 225                 KWGBEREG_WR(regs->ha_remap[param->win], param->high_addr);
 226
 227         /* Base address enable reg (BARER) */
 228         if (param->enable == 1)
 229                 KWGBEREG_BITS_RESET(regs->bare, (1 << param->win));
 230         else
 231                 KWGBEREG_BITS_SET(regs->bare, (1 << param->win));
 232 }
 233
 234 static void set_dram_access(struct kwgbe_registers *regs)
 235 {
 236         struct kwgbe_winparam win_param;
 237         int i;
 238
 239         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 240                 /* Set access parameters for DRAM bank i */
 241                 win_param.win = i;      /* Use Ethernet window i */
 242                 /* Window target - DDR */
 243                 win_param.target = KWGBE_TARGET_DRAM;
 244                 /* Enable full access */
 245                 win_param.access_ctrl = EWIN_ACCESS_FULL;
 246                 win_param.high_addr = 0;
 247                 /* Get bank base */
 248                 win_param.base_addr = kw_sdram_bar(i);
 249                 win_param.size = kw_sdram_bs(i);        /* Get bank size */
 250                 if (win_param.size == 0)
 251                         win_param.enable = 0;
 252                 else
 253                         win_param.enable = 1;   /* Enable the access */
 254
 255                 /* Enable DRAM bank */
 256                 switch (i) {
 257                 case 0:
 258                         win_param.attrib = EBAR_DRAM_CS0;
 259                         break;
 260                 case 1:
 261                         win_param.attrib = EBAR_DRAM_CS1;
 262                         break;
 263                 case 2:
 264                         win_param.attrib = EBAR_DRAM_CS2;
 265                         break;
 266                 case 3:
 267                         win_param.attrib = EBAR_DRAM_CS3;
 268                         break;
 269                 default:
 270                         /* invalide bank, disable access */
 271                         win_param.enable = 0;
 272                         win_param.attrib = 0;
 273                         break;
 274                 }
 275                 /* Set the access control for address window(EPAPR) RD/WR */
 276                 set_access_control(regs, &win_param);
 277         }
 278 }
 279
 280 /*
 281  * port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
 282  *
 283  * Go through all the DA filter tables (Unicast, Special Multicast & Other
 284  * Multicast) and set each entry to 0.
 285  */
 286 static void port_init_mac_tables(struct kwgbe_registers *regs)
 287 {
 288         int table_index;
 289
 290         /* Clear DA filter unicast table (Ex_dFUT) */
 291         for (table_index = 0; table_index < 4; ++table_index)
 292                 KWGBEREG_WR(regs->dfut[table_index], 0);
 293
 294         for (table_index = 0; table_index < 64; ++table_index) {
 295                 /* Clear DA filter special multicast table (Ex_dFSMT) */
 296                 KWGBEREG_WR(regs->dfsmt[table_index], 0);
 297                 /* Clear DA filter other multicast table (Ex_dFOMT) */
 298                 KWGBEREG_WR(regs->dfomt[table_index], 0);
 299         }
 300 }
 301
 302 /*
 303  * port_uc_addr - This function Set the port unicast address table
 304  *
 305  * This function locates the proper entry in the Unicast table for the
 306  * specified MAC nibble and sets its properties according to function
 307  * parameters.
 308  * This function add/removes MAC addresses from the port unicast address
 309  * table.
 310  *
 311  * @uc_nibble   Unicast MAC Address last nibble.
 312  * @option      0 = Add, 1 = remove address.
 313  *
 314  * RETURN: 1 if output succeeded. 0 if option parameter is invalid.
 315  */
 316 static int port_uc_addr(struct kwgbe_registers *regs, u8 uc_nibble,
 317                         int option)
 318 {
 319         u32 unicast_reg;
 320         u32 tbl_offset;
 321         u32 reg_offset;
 322
 323         /* Locate the Unicast table entry */
 324         uc_nibble = (0xf & uc_nibble);
 325         /* Register offset from unicast table base */
 326         tbl_offset = (uc_nibble / 4);
 327         /* Entry offset within the above register */
 328         reg_offset = uc_nibble % 4;
 329
 330         switch (option) {
 331         case REJECT_MAC_ADDR:
 332                 /*
 333                  * Clear accepts frame bit at specified unicast
 334                  * DA table entry
 335                  */
 336                 unicast_reg = KWGBEREG_RD(regs->dfut[tbl_offset]);
 337                 unicast_reg &= (0xFF << (8 * reg_offset));
 338                 KWGBEREG_WR(regs->dfut[tbl_offset], unicast_reg);
 339                 break;
 340         case ACCEPT_MAC_ADDR:
 341                 /* Set accepts frame bit at unicast DA filter table entry */
 342                 unicast_reg = KWGBEREG_RD(regs->dfut[tbl_offset]);
 343                 unicast_reg &= (0xFF << (8 * reg_offset));
 344                 unicast_reg |= ((0x01 | (RXUQ << 1)) << (8 * reg_offset));
 345                 KWGBEREG_WR(regs->dfut[tbl_offset], unicast_reg);
 346                 break;
 347         default:
 348                 return 0;
 349         }
 350         return 1;
 351 }
 352
 353 /*
 354  * port_uc_addr_set - This function Set the port Unicast address.
 355  */
 356 static void port_uc_addr_set(struct kwgbe_registers *regs, u8 * p_addr)
 357 {
 358         u32 mac_h;
 359         u32 mac_l;
 360
 361         mac_l = (p_addr[4] << 8) | (p_addr[5]);
 362         mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) |
 363                 (p_addr[3] << 0);
 364
 365         KWGBEREG_WR(regs->macal, mac_l);
 366         KWGBEREG_WR(regs->macah, mac_h);
 367
 368         /* Accept frames of this address */
 369         port_uc_addr(regs, p_addr[5], ACCEPT_MAC_ADDR);
 370 }
 371
 372 /*
 373  * kwgbe_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
 374  */
 375 static void kwgbe_init_rx_desc_ring(struct kwgbe_device *dkwgbe)
 376 {
 377         struct kwgbe_rxdesc *p_rx_desc;
 378         int i;
 379
 380         /* initialize the Rx descriptors ring */
 381         p_rx_desc = dkwgbe->p_rxdesc;
 382         for (i = 0; i < RINGSZ; i++) {
 383                 p_rx_desc->cmd_sts =
 384                         KWGBE_BUFFER_OWNED_BY_DMA | KWGBE_RX_EN_INTERRUPT;
 385                 p_rx_desc->buf_size = PKTSIZE_ALIGN;
 386                 p_rx_desc->byte_cnt = 0;
 387                 p_rx_desc->buf_ptr = dkwgbe->p_rxbuf + i * PKTSIZE_ALIGN;
 388                 if (i == (RINGSZ - 1))
 389                         p_rx_desc->nxtdesc_p = dkwgbe->p_rxdesc;
 390                 else {
 391                         p_rx_desc->nxtdesc_p = (struct kwgbe_rxdesc *)
 392                                 ((u32) p_rx_desc + KW_RXQ_DESC_ALIGNED_SIZE);
 393                         p_rx_desc = p_rx_desc->nxtdesc_p;
 394                 }
 395         }
 396         dkwgbe->p_rxdesc_curr = dkwgbe->p_rxdesc;
 397 }
 398
 399 static int kwgbe_init(struct eth_device *dev)
 400 {
 401         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
 402         struct kwgbe_registers *regs = dkwgbe->regs;
 403         int i;
 404
 405         /* setup RX rings */
 406         kwgbe_init_rx_desc_ring(dkwgbe);
 407
 408         /* Clear the ethernet port interrupts */
 409         KWGBEREG_WR(regs->ic, 0);
 410         KWGBEREG_WR(regs->ice, 0);
 411         /* Unmask RX buffer and TX end interrupt */
 412         KWGBEREG_WR(regs->pim, INT_CAUSE_UNMASK_ALL);
 413         /* Unmask phy and link status changes interrupts */
 414         KWGBEREG_WR(regs->peim, INT_CAUSE_UNMASK_ALL_EXT);
 415
 416         set_dram_access(regs);
 417         port_init_mac_tables(regs);
 418         port_uc_addr_set(regs, dkwgbe->dev.enetaddr);
 419
 420         /* Assign port configuration and command. */
 421         KWGBEREG_WR(regs->pxc, PRT_CFG_VAL);
 422         KWGBEREG_WR(regs->pxcx, PORT_CFG_EXTEND_VALUE);
 423         KWGBEREG_WR(regs->psc0, PORT_SERIAL_CONTROL_VALUE);
 424         /* Disable port initially */
 425         KWGBEREG_BITS_SET(regs->psc0, KWGBE_SERIAL_PORT_EN);
 426
 427         /* Assign port SDMA configuration */
 428         KWGBEREG_WR(regs->sdc, PORT_SDMA_CFG_VALUE);
 429         KWGBEREG_WR(regs->tqx[0].qxttbc, QTKNBKT_DEF_VAL);
 430         KWGBEREG_WR(regs->tqx[0].tqxtbc, (QMTBS_DEF_VAL << 16) | QTKNRT_DEF_VAL);
 431         /* Turn off the port/RXUQ bandwidth limitation */
 432         KWGBEREG_WR(regs->pmtu, 0);
 433
 434         /* Set maximum receive buffer to 9700 bytes */
 435         KWGBEREG_WR(regs->psc0, KWGBE_MAX_RX_PACKET_9700BYTE
 436                         | (KWGBEREG_RD(regs->psc0) & MRU_MASK));
 437
 438         /*
 439          * Set ethernet MTU for leaky bucket mechanism to 0 - this will
 440          * disable the leaky bucket mechanism .
 441          */
 442         KWGBEREG_WR(regs->pmtu, 0);
 443
 444         /* Assignment of Rx CRDB of given RXUQ */
 445         KWGBEREG_WR(regs->rxcdp[RXUQ].rxcdp, (u32) dkwgbe->p_rxdesc_curr);
 446         /* Enable port Rx. */
 447         KWGBEREG_WR(regs->rqc, (1 << RXUQ));
 448
 449 #if (defined (CONFIG_MII) || defined (CONFIG_CMD_MII)) \
 450          && defined (CONFIG_SYS_FAULT_ECHO_LINK_DOWN)
 451         /* Wait up to 5s for the link status */
 452         for (i = 0; i < 5; i++) {
 453                 u16 phyadr;
 454
 455                 miiphy_read(dev->name, KIRKWOOD_PHY_ADR_REQUEST,
 456                                 KIRKWOOD_PHY_ADR_REQUEST, &phyadr);
 457                 /* Return if we get link up */
 458                 if (miiphy_link(dev->name, phyadr))
 459                         return 0;
 460                 udelay(1000000);
 461         }
 462
 463         printf("No link on %s\n", dev->name);
 464         return -1;
 465 #endif
 466         return 0;
 467 }
 468
 469 static int kwgbe_halt(struct eth_device *dev)
 470 {
 471         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
 472         struct kwgbe_registers *regs = dkwgbe->regs;
 473
 474         /* Disable all gigE address decoder */
 475         KWGBEREG_WR(regs->bare, 0x3f);
 476
 477         stop_queue(&regs->tqc);
 478         stop_queue(&regs->rqc);
 479
 480         /* Enable port */
 481         KWGBEREG_BITS_RESET(regs->psc0, KWGBE_SERIAL_PORT_EN);
 482         /* Set port is not reset */
 483         KWGBEREG_BITS_RESET(regs->psc1, 1 << 4);
 484 #ifdef CONFIG_SYS_MII_MODE
 485         /* Set MMI interface up */
 486         KWGBEREG_BITS_RESET(regs->psc1, 1 << 3);
 487 #endif
 488         /* Disable & mask ethernet port interrupts */
 489         KWGBEREG_WR(regs->ic, 0);
 490         KWGBEREG_WR(regs->ice, 0);
 491         KWGBEREG_WR(regs->pim, 0);
 492         KWGBEREG_WR(regs->peim, 0);
 493
 494         return 0;
 495 }
 496
 497 static int kwgbe_send(struct eth_device *dev, volatile void *dataptr,
 498                       int datasize)
 499 {
 500         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
 501         struct kwgbe_registers *regs = dkwgbe->regs;
 502         struct kwgbe_txdesc *p_txdesc = dkwgbe->p_txdesc;
 503         void *p = (void *)dataptr;
 504         u32 cmd_sts;
 505
 506         /* Copy buffer if it's misaligned */
 507         if ((u32) dataptr & 0x07) {
 508                 if (datasize > PKTSIZE_ALIGN) {
 509                         printf("Non-aligned data too large (%d)\n",
 510                                         datasize);
 511                         return -1;
 512                 }
 513
 514                 memcpy(dkwgbe->p_aligned_txbuf, p, datasize);
 515                 p = dkwgbe->p_aligned_txbuf;
 516         }
 517
 518         p_txdesc->cmd_sts = KWGBE_ZERO_PADDING | KWGBE_GEN_CRC;
 519         p_txdesc->cmd_sts |= KWGBE_TX_FIRST_DESC | KWGBE_TX_LAST_DESC;
 520         p_txdesc->cmd_sts |= KWGBE_BUFFER_OWNED_BY_DMA;
 521         p_txdesc->cmd_sts |= KWGBE_TX_EN_INTERRUPT;
 522         p_txdesc->buf_ptr = (u8 *) p;
 523         p_txdesc->byte_cnt = datasize;
 524
 525         /* Apply send command using zeroth RXUQ */
 526         KWGBEREG_WR(regs->tcqdp[TXUQ], (u32) p_txdesc);
 527         KWGBEREG_WR(regs->tqc, (1 << TXUQ));
 528
 529         /*
 530          * wait for packet xmit completion
 531          */
 532         cmd_sts = readl(&p_txdesc->cmd_sts);
 533         while (cmd_sts & KWGBE_BUFFER_OWNED_BY_DMA) {
 534                 /* return fail if error is detected */
 535                 if ((cmd_sts & (KWGBE_ERROR_SUMMARY | KWGBE_TX_LAST_FRAME)) ==
 536                                 (KWGBE_ERROR_SUMMARY | KWGBE_TX_LAST_FRAME) &&
 537                                 cmd_sts & (KWGBE_UR_ERROR | KWGBE_RL_ERROR)) {
 538                         printf("Err..(%s) in xmit packet\n", __FUNCTION__);
 539                         return -1;
 540                 }
 541                 cmd_sts = readl(&p_txdesc->cmd_sts);
 542         };
 543         return 0;
 544 }
 545
 546 static int kwgbe_recv(struct eth_device *dev)
 547 {
 548         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
 549         struct kwgbe_rxdesc *p_rxdesc_curr = dkwgbe->p_rxdesc_curr;
 550         u32 cmd_sts;
 551         u32 timeout = 0;
 552
 553         /* wait untill rx packet available or timeout */
 554         do {
 555                 if (timeout < KWGBE_PHY_SMI_TIMEOUT)
 556                         timeout++;
 557                 else {
 558                         debug("%s time out...\n", __FUNCTION__);
 559                         return -1;
 560                 }
 561         } while (readl(&p_rxdesc_curr->cmd_sts) & KWGBE_BUFFER_OWNED_BY_DMA);
 562
 563         if (p_rxdesc_curr->byte_cnt != 0) {
 564                 debug("%s: Received %d byte Packet @ 0x%x (cmd_sts= %08x)\n",
 565                         __FUNCTION__, (u32) p_rxdesc_curr->byte_cnt,
 566                         (u32) p_rxdesc_curr->buf_ptr,
 567                         (u32) p_rxdesc_curr->cmd_sts);
 568         }
 569
 570         /*
 571          * In case received a packet without first/last bits on
 572          * OR the error summary bit is on,
 573          * the packets needs to be dropeed.
 574          */
 575         cmd_sts = readl(&p_rxdesc_curr->cmd_sts);
 576
 577         if ((cmd_sts &
 578                 (KWGBE_RX_FIRST_DESC | KWGBE_RX_LAST_DESC))
 579                 != (KWGBE_RX_FIRST_DESC | KWGBE_RX_LAST_DESC)) {
 580
 581                 printf("Err..(%s) Dropping packet spread on"
 582                         " multiple descriptors\n", __FUNCTION__);
 583
 584         } else if (cmd_sts & KWGBE_ERROR_SUMMARY) {
 585
 586                 printf("Err..(%s) Dropping packet with errors\n",
 587                         __FUNCTION__);
 588
 589         } else {
 590                 /* !!! call higher layer processing */
 591                 debug("%s: Sending Received packet to"
 592                         " upper layer (NetReceive)\n", __FUNCTION__);
 593
 594                 /* let the upper layer handle the packet */
 595                 NetReceive((p_rxdesc_curr->buf_ptr + RX_BUF_OFFSET),
 596                         (int)(p_rxdesc_curr->byte_cnt - RX_BUF_OFFSET));
 597         }
 598         /*
 599          * free these descriptors and point next in the ring
 600          */
 601         p_rxdesc_curr->cmd_sts =
 602                 KWGBE_BUFFER_OWNED_BY_DMA | KWGBE_RX_EN_INTERRUPT;
 603         p_rxdesc_curr->buf_size = PKTSIZE_ALIGN;
 604         p_rxdesc_curr->byte_cnt = 0;
 605
 606         writel((unsigned)p_rxdesc_curr->nxtdesc_p, &dkwgbe->p_rxdesc_curr);
 607
 608         return 0;
 609 }
 610
 611 int kirkwood_egiga_initialize(bd_t * bis)
 612 {
 613         struct kwgbe_device *dkwgbe;
 614         struct eth_device *dev;
 615         int devnum;
 616         char *s;
 617         u8 used_ports[MAX_KWGBE_DEVS] = CONFIG_KIRKWOOD_EGIGA_PORTS;
 618
 619         for (devnum = 0; devnum < MAX_KWGBE_DEVS; devnum++) {
 620                 /*skip if port is configured not to use */
 621                 if (used_ports[devnum] == 0)
 622                         continue;
 623
 624                 if (!(dkwgbe = malloc(sizeof(struct kwgbe_device))))
 625                         goto error1;
 626
 627                 memset(dkwgbe, 0, sizeof(struct kwgbe_device));
 628
 629                 if (!(dkwgbe->p_rxdesc =
 630                       (struct kwgbe_rxdesc *)memalign(PKTALIGN,
 631                                                 KW_RXQ_DESC_ALIGNED_SIZE
 632                                                 * RINGSZ + 1)))
 633                         goto error2;
 634
 635                 if (!(dkwgbe->p_rxbuf = (u8 *) memalign(PKTALIGN, RINGSZ
 636                                                         * PKTSIZE_ALIGN + 1)))
 637                         goto error3;
 638
 639                 if (!(dkwgbe->p_aligned_txbuf = memalign(8, PKTSIZE_ALIGN)))
 640                         goto error4;
 641
 642                 if (!(dkwgbe->p_txdesc = (struct kwgbe_txdesc *)
 643                       memalign(PKTALIGN, sizeof(struct kwgbe_txdesc) + 1))) {
 644                         free(dkwgbe->p_aligned_txbuf);
 645                       error4:
 646                         free(dkwgbe->p_rxbuf);
 647                       error3:
 648                         free(dkwgbe->p_rxdesc);
 649                       error2:
 650                         free(dkwgbe);
 651                       error1:
 652                         printf("Err.. %s Failed to allocate memory\n",
 653                                 __FUNCTION__);
 654                         return -1;
 655                 }
 656
 657                 dev = &dkwgbe->dev;
 658
 659                 /* must be less than NAMESIZE (16) */
 660                 sprintf(dev->name, "egiga%d", devnum);
 661
 662                 /* Extract the MAC address from the environment */
 663                 switch (devnum) {
 664                 case 0:
 665                         dkwgbe->regs = (void *)KW_EGIGA0_BASE;
 666                         s = "ethaddr";
 667                         break;
 668                 case 1:
 669                         dkwgbe->regs = (void *)KW_EGIGA1_BASE;
 670                         s = "eth1addr";
 671                         break;
 672                 default:        /* this should never happen */
 673                         printf("Err..(%s) Invalid device number %d\n",
 674                                 __FUNCTION__, devnum);
 675                         return -1;
 676                 }
 677
 678                 while (!eth_getenv_enetaddr(s, dev->enetaddr)) {
 679                         /* Generate Random Private MAC addr if not set */
 680                         dev->enetaddr[0] = 0x02;
 681                         dev->enetaddr[1] = 0x50;
 682                         dev->enetaddr[2] = 0x43;
 683                         dev->enetaddr[3] = get_random_hex();
 684                         dev->enetaddr[4] = get_random_hex();
 685                         dev->enetaddr[5] = get_random_hex();
 686                         eth_setenv_enetaddr(s, dev->enetaddr);
 687                 }
 688
 689                 dev->init = (void *)kwgbe_init;
 690                 dev->halt = (void *)kwgbe_halt;
 691                 dev->send = (void *)kwgbe_send;
 692                 dev->recv = (void *)kwgbe_recv;
 693
 694                 eth_register(dev);
 695
 696 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 697                 miiphy_register(dev->name, smi_reg_read, smi_reg_write);
 698                 /* Set phy address of the port */
 699                 miiphy_write(dev->name, KIRKWOOD_PHY_ADR_REQUEST,
 700                                 KIRKWOOD_PHY_ADR_REQUEST, PHY_BASE_ADR + devnum);
 701 #endif
 702         }
 703         return 0;
 704 }