drivers/net/inca-ip_sw.c

   1 /*
   2  * INCA-IP internal switch ethernet driver.
   3  *
   4  * (C) Copyright 2003-2004
   5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26
  27 #include <common.h>
  28
  29 #include <malloc.h>
  30 #include <net.h>
  31 #include <netdev.h>
  32 #include <asm/inca-ip.h>
  33 #include <asm/addrspace.h>
  34
  35
  36 #define NUM_RX_DESC     PKTBUFSRX
  37 #define NUM_TX_DESC     3
  38 #define TOUT_LOOP       1000000
  39
  40
  41 #define DELAY   udelay(10000)
  42   /* Sometimes the store word instruction hangs while writing to one
  43    * of the Switch registers. Moving the instruction into a separate
  44    * function somehow makes the problem go away.
  45    */
  46 static void SWORD(volatile u32 * reg, u32 value)
  47 {
  48         *reg = value;
  49 }
  50
  51 #define DMA_WRITE_REG(reg, value) *((volatile u32 *)reg) = (u32)value;
  52 #define DMA_READ_REG(reg, value)    value = (u32)*((volatile u32*)reg)
  53 #define SW_WRITE_REG(reg, value)   \
  54         SWORD(reg, value);\
  55         DELAY;\
  56         SWORD(reg, value);
  57
  58 #define SW_READ_REG(reg, value)    \
  59         value = (u32)*((volatile u32*)reg);\
  60         DELAY;\
  61         value = (u32)*((volatile u32*)reg);
  62
  63 #define INCA_DMA_TX_POLLING_TIME        0x07
  64 #define INCA_DMA_RX_POLLING_TIME        0x07
  65
  66 #define INCA_DMA_TX_HOLD                0x80000000
  67 #define INCA_DMA_TX_EOP                 0x40000000
  68 #define INCA_DMA_TX_SOP                 0x20000000
  69 #define INCA_DMA_TX_ICPT                0x10000000
  70 #define INCA_DMA_TX_IEOP                0x08000000
  71
  72 #define INCA_DMA_RX_C                   0x80000000
  73 #define INCA_DMA_RX_SOP                 0x40000000
  74 #define INCA_DMA_RX_EOP                 0x20000000
  75
  76 #define INCA_SWITCH_PHY_SPEED_10H       0x1
  77 #define INCA_SWITCH_PHY_SPEED_10F       0x5
  78 #define INCA_SWITCH_PHY_SPEED_100H      0x2
  79 #define INCA_SWITCH_PHY_SPEED_100F      0x6
  80
  81 /************************ Auto MDIX settings ************************/
  82 #define INCA_IP_AUTO_MDIX_LAN_PORTS_DIR         INCA_IP_Ports_P1_DIR
  83 #define INCA_IP_AUTO_MDIX_LAN_PORTS_ALTSEL      INCA_IP_Ports_P1_ALTSEL
  84 #define INCA_IP_AUTO_MDIX_LAN_PORTS_OUT         INCA_IP_Ports_P1_OUT
  85 #define INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX     16
  86
  87 #define WAIT_SIGNAL_RETRIES                     100
  88 #define WAIT_LINK_RETRIES                       100
  89 #define LINK_RETRY_DELAY                        2000  /* ms */
  90 /********************************************************************/
  91
  92 typedef struct
  93 {
  94         union {
  95                 struct {
  96                         volatile u32 HOLD               :1;
  97                         volatile u32 ICpt               :1;
  98                         volatile u32 IEop               :1;
  99                         volatile u32 offset             :3;
 100                         volatile u32 reserved0          :4;
 101                         volatile u32 NFB                :22;
 102                 }field;
 103
 104                 volatile u32 word;
 105         }params;
 106
 107         volatile u32 nextRxDescPtr;
 108
 109         volatile u32 RxDataPtr;
 110
 111         union {
 112                 struct {
 113                         volatile u32 C                  :1;
 114                         volatile u32 Sop                :1;
 115                         volatile u32 Eop                :1;
 116                         volatile u32 reserved3          :12;
 117                         volatile u32 NBT                :17;
 118                 }field;
 119
 120                 volatile u32 word;
 121         }status;
 122
 123 } inca_rx_descriptor_t;
 124
 125
 126 typedef struct
 127 {
 128         union {
 129                 struct {
 130                         volatile u32 HOLD               :1;
 131                         volatile u32 Eop                :1;
 132                         volatile u32 Sop                :1;
 133                         volatile u32 ICpt               :1;
 134                         volatile u32 IEop               :1;
 135                         volatile u32 reserved0          :5;
 136                         volatile u32 NBA                :22;
 137                 }field;
 138
 139                 volatile u32 word;
 140         }params;
 141
 142         volatile u32 nextTxDescPtr;
 143
 144         volatile u32 TxDataPtr;
 145
 146         volatile u32 C                  :1;
 147         volatile u32 reserved3          :31;
 148
 149 } inca_tx_descriptor_t;
 150
 151
 152 static inca_rx_descriptor_t rx_ring[NUM_RX_DESC] __attribute__ ((aligned(16)));
 153 static inca_tx_descriptor_t tx_ring[NUM_TX_DESC] __attribute__ ((aligned(16)));
 154
 155 static int tx_new, rx_new, tx_hold, rx_hold;
 156 static int tx_old_hold = -1;
 157 static int initialized  = 0;
 158
 159
 160 static int inca_switch_init(struct eth_device *dev, bd_t * bis);
 161 static int inca_switch_send(struct eth_device *dev, void *packet, int length);
 162 static int inca_switch_recv(struct eth_device *dev);
 163 static void inca_switch_halt(struct eth_device *dev);
 164 static void inca_init_switch_chip(void);
 165 static void inca_dma_init(void);
 166 static int inca_amdix(void);
 167
 168
 169 int inca_switch_initialize(bd_t * bis)
 170 {
 171         struct eth_device *dev;
 172
 173 #if 0
 174         printf("Entered inca_switch_initialize()\n");
 175 #endif
 176
 177         if (!(dev = (struct eth_device *) malloc (sizeof *dev))) {
 178                 printf("Failed to allocate memory\n");
 179                 return 0;
 180         }
 181         memset(dev, 0, sizeof(*dev));
 182
 183         inca_dma_init();
 184
 185         inca_init_switch_chip();
 186
 187 #if defined(CONFIG_INCA_IP_SWITCH_AMDIX)
 188         inca_amdix();
 189 #endif
 190
 191         sprintf(dev->name, "INCA-IP Switch");
 192         dev->init = inca_switch_init;
 193         dev->halt = inca_switch_halt;
 194         dev->send = inca_switch_send;
 195         dev->recv = inca_switch_recv;
 196
 197         eth_register(dev);
 198
 199 #if 0
 200         printf("Leaving inca_switch_initialize()\n");
 201 #endif
 202
 203         return 0;
 204 }
 205
 206
 207 static int inca_switch_init(struct eth_device *dev, bd_t * bis)
 208 {
 209         int i;
 210         u32 v, regValue;
 211         u16 wTmp;
 212
 213 #if 0
 214         printf("Entering inca_switch_init()\n");
 215 #endif
 216
 217         /* Set MAC address.
 218          */
 219         wTmp = (u16)dev->enetaddr[0];
 220         regValue = (wTmp << 8) | dev->enetaddr[1];
 221
 222         SW_WRITE_REG(INCA_IP_Switch_PMAC_SA1, regValue);
 223
 224         wTmp = (u16)dev->enetaddr[2];
 225         regValue = (wTmp << 8) | dev->enetaddr[3];
 226         regValue = regValue << 16;
 227         wTmp = (u16)dev->enetaddr[4];
 228         regValue |= (wTmp<<8) | dev->enetaddr[5];
 229
 230         SW_WRITE_REG(INCA_IP_Switch_PMAC_SA2, regValue);
 231
 232         /* Initialize the descriptor rings.
 233          */
 234         for (i = 0; i < NUM_RX_DESC; i++) {
 235                 inca_rx_descriptor_t * rx_desc = (inca_rx_descriptor_t *)CKSEG1ADDR(&rx_ring[i]);
 236                 memset(rx_desc, 0, sizeof(rx_ring[i]));
 237
 238                 /* Set maximum size of receive buffer.
 239                  */
 240                 rx_desc->params.field.NFB = PKTSIZE_ALIGN;
 241
 242                 /* Set the offset of the receive buffer. Zero means
 243                  * that the offset mechanism is not used.
 244                  */
 245                 rx_desc->params.field.offset = 0;
 246
 247                 /* Check if it is the last descriptor.
 248                  */
 249                 if (i == (NUM_RX_DESC - 1)) {
 250                         /* Let the last descriptor point to the first
 251                          * one.
 252                          */
 253                         rx_desc->nextRxDescPtr = (u32)CKSEG1ADDR(rx_ring);
 254                 } else {
 255                         /* Set the address of the next descriptor.
 256                          */
 257                         rx_desc->nextRxDescPtr = (u32)CKSEG1ADDR(&rx_ring[i+1]);
 258                 }
 259
 260                 rx_desc->RxDataPtr = (u32)CKSEG1ADDR(NetRxPackets[i]);
 261         }
 262
 263 #if 0
 264         printf("rx_ring = 0x%08X 0x%08X\n", (u32)rx_ring, (u32)&rx_ring[0]);
 265         printf("tx_ring = 0x%08X 0x%08X\n", (u32)tx_ring, (u32)&tx_ring[0]);
 266 #endif
 267
 268         for (i = 0; i < NUM_TX_DESC; i++) {
 269                 inca_tx_descriptor_t * tx_desc = (inca_tx_descriptor_t *)CKSEG1ADDR(&tx_ring[i]);
 270
 271                 memset(tx_desc, 0, sizeof(tx_ring[i]));
 272
 273                 tx_desc->params.word       = 0;
 274                 tx_desc->params.field.HOLD = 1;
 275                 tx_desc->C                 = 1;
 276
 277                         /* Check if it is the last descriptor.
 278                          */
 279                 if (i == (NUM_TX_DESC - 1)) {
 280                                 /* Let the last descriptor point to the
 281                                  * first one.
 282                                  */
 283                         tx_desc->nextTxDescPtr = (u32)CKSEG1ADDR(tx_ring);
 284                 } else {
 285                                 /* Set the address of the next descriptor.
 286                                  */
 287                         tx_desc->nextTxDescPtr = (u32)CKSEG1ADDR(&tx_ring[i+1]);
 288                 }
 289         }
 290
 291         /* Initialize RxDMA.
 292          */
 293         DMA_READ_REG(INCA_IP_DMA_DMA_RXISR, v);
 294         debug("RX status = 0x%08X\n", v);
 295
 296         /* Writing to the FRDA of CHANNEL.
 297          */
 298         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXFRDA0, (u32)rx_ring);
 299
 300         /* Writing to the COMMAND REG.
 301          */
 302         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, INCA_IP_DMA_DMA_RXCCR0_INIT);
 303
 304         /* Initialize TxDMA.
 305          */
 306         DMA_READ_REG(INCA_IP_DMA_DMA_TXISR, v);
 307         debug("TX status = 0x%08X\n", v);
 308
 309         /* Writing to the FRDA of CHANNEL.
 310          */
 311         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXFRDA0, (u32)tx_ring);
 312
 313         tx_new = rx_new = 0;
 314
 315         tx_hold = NUM_TX_DESC - 1;
 316         rx_hold = NUM_RX_DESC - 1;
 317
 318 #if 0
 319         rx_ring[rx_hold].params.field.HOLD = 1;
 320 #endif
 321         /* enable spanning tree forwarding, enable the CPU port */
 322         /* ST_PT:
 323          *      CPS (CPU port status)   0x3 (forwarding)
 324          *      LPS (LAN port status)   0x3 (forwarding)
 325          *      PPS (PC port status)    0x3 (forwarding)
 326          */
 327         SW_WRITE_REG(INCA_IP_Switch_ST_PT,0x3f);
 328
 329 #if 0
 330         printf("Leaving inca_switch_init()\n");
 331 #endif
 332
 333         return 0;
 334 }
 335
 336
 337 static int inca_switch_send(struct eth_device *dev, void *packet, int length)
 338 {
 339         int                    i;
 340         int                    res      = -1;
 341         u32                    command;
 342         u32                    regValue;
 343         inca_tx_descriptor_t * tx_desc  = (inca_tx_descriptor_t *)CKSEG1ADDR(&tx_ring[tx_new]);
 344
 345 #if 0
 346         printf("Entered inca_switch_send()\n");
 347 #endif
 348
 349         if (length <= 0) {
 350                 printf ("%s: bad packet size: %d\n", dev->name, length);
 351                 goto Done;
 352         }
 353
 354         for(i = 0; tx_desc->C == 0; i++) {
 355                 if (i >= TOUT_LOOP) {
 356                         printf("%s: tx error buffer not ready\n", dev->name);
 357                         goto Done;
 358                 }
 359         }
 360
 361         if (tx_old_hold >= 0) {
 362                 ((inca_tx_descriptor_t *)CKSEG1ADDR(&tx_ring[tx_old_hold]))->params.field.HOLD = 1;
 363         }
 364         tx_old_hold = tx_hold;
 365
 366         tx_desc->params.word =
 367                         (INCA_DMA_TX_SOP | INCA_DMA_TX_EOP | INCA_DMA_TX_HOLD);
 368
 369         tx_desc->C = 0;
 370         tx_desc->TxDataPtr = (u32)packet;
 371         tx_desc->params.field.NBA = length;
 372
 373         ((inca_tx_descriptor_t *)CKSEG1ADDR(&tx_ring[tx_hold]))->params.field.HOLD = 0;
 374
 375         tx_hold = tx_new;
 376         tx_new  = (tx_new + 1) % NUM_TX_DESC;
 377
 378
 379         if (! initialized) {
 380                 command = INCA_IP_DMA_DMA_TXCCR0_INIT;
 381                 initialized = 1;
 382         } else {
 383                 command = INCA_IP_DMA_DMA_TXCCR0_HR;
 384         }
 385
 386         DMA_READ_REG(INCA_IP_DMA_DMA_TXCCR0, regValue);
 387         regValue |= command;
 388 #if 0
 389         printf("regValue = 0x%x\n", regValue);
 390 #endif
 391         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, regValue);
 392
 393 #if 1
 394         for(i = 0; ((inca_tx_descriptor_t *)CKSEG1ADDR(&tx_ring[tx_hold]))->C == 0; i++) {
 395                 if (i >= TOUT_LOOP) {
 396                         printf("%s: tx buffer not ready\n", dev->name);
 397                         goto Done;
 398                 }
 399         }
 400 #endif
 401         res = length;
 402 Done:
 403 #if 0
 404         printf("Leaving inca_switch_send()\n");
 405 #endif
 406         return res;
 407 }
 408
 409
 410 static int inca_switch_recv(struct eth_device *dev)
 411 {
 412         int                    length  = 0;
 413         inca_rx_descriptor_t * rx_desc;
 414
 415 #if 0
 416         printf("Entered inca_switch_recv()\n");
 417 #endif
 418
 419         for (;;) {
 420                 rx_desc = (inca_rx_descriptor_t *)CKSEG1ADDR(&rx_ring[rx_new]);
 421
 422                 if (rx_desc->status.field.C == 0) {
 423                         break;
 424                 }
 425
 426 #if 0
 427                 rx_ring[rx_new].params.field.HOLD = 1;
 428 #endif
 429
 430                 if (! rx_desc->status.field.Eop) {
 431                         printf("Partly received packet!!!\n");
 432                         break;
 433                 }
 434
 435                 length = rx_desc->status.field.NBT;
 436                 rx_desc->status.word &=
 437                          ~(INCA_DMA_RX_EOP | INCA_DMA_RX_SOP | INCA_DMA_RX_C);
 438 #if 0
 439 {
 440   int i;
 441   for (i=0;i<length - 4;i++) {
 442     if (i % 16 == 0) printf("\n%04x: ", i);
 443     printf("%02X ", NetRxPackets[rx_new][i]);
 444   }
 445   printf("\n");
 446 }
 447 #endif
 448
 449                 if (length) {
 450 #if 0
 451                         printf("Received %d bytes\n", length);
 452 #endif
 453                         NetReceive((void*)CKSEG1ADDR(NetRxPackets[rx_new]), length - 4);
 454                 } else {
 455 #if 1
 456                         printf("Zero length!!!\n");
 457 #endif
 458                 }
 459
 460
 461                 ((inca_rx_descriptor_t *)CKSEG1ADDR(&rx_ring[rx_hold]))->params.field.HOLD = 0;
 462
 463                 rx_hold = rx_new;
 464
 465                 rx_new = (rx_new + 1) % NUM_RX_DESC;
 466         }
 467
 468 #if 0
 469         printf("Leaving inca_switch_recv()\n");
 470 #endif
 471
 472         return length;
 473 }
 474
 475
 476 static void inca_switch_halt(struct eth_device *dev)
 477 {
 478 #if 0
 479         printf("Entered inca_switch_halt()\n");
 480 #endif
 481
 482 #if 1
 483         initialized = 0;
 484 #endif
 485 #if 1
 486         /* Disable forwarding to the CPU port.
 487          */
 488         SW_WRITE_REG(INCA_IP_Switch_ST_PT,0xf);
 489
 490         /* Close RxDMA channel.
 491          */
 492         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF);
 493
 494         /* Close TxDMA channel.
 495          */
 496         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, INCA_IP_DMA_DMA_TXCCR0_OFF);
 497
 498
 499 #endif
 500 #if 0
 501         printf("Leaving inca_switch_halt()\n");
 502 #endif
 503 }
 504
 505
 506 static void inca_init_switch_chip(void)
 507 {
 508         u32 regValue;
 509
 510         /* To workaround a problem with collision counter
 511          * (see Errata sheet).
 512          */
 513         SW_WRITE_REG(INCA_IP_Switch_PC_TX_CTL, 0x00000001);
 514         SW_WRITE_REG(INCA_IP_Switch_LAN_TX_CTL, 0x00000001);
 515
 516 #if 1
 517         /* init MDIO configuration:
 518          *      MDS (Poll speed):       0x01 (4ms)
 519          *      PHY_LAN_ADDR:           0x06
 520          *      PHY_PC_ADDR:            0x05
 521          *      UEP (Use External PHY): 0x00 (Internal PHY is used)
 522          *      PS (Port Select):       0x00 (PT/UMM for LAN)
 523          *      PT (PHY Test):          0x00 (no test mode)
 524          *      UMM (Use MDIO Mode):    0x00 (state machine is disabled)
 525          */
 526         SW_WRITE_REG(INCA_IP_Switch_MDIO_CFG, 0x4c50);
 527
 528         /* init PHY:
 529          *      SL (Auto Neg. Speed for LAN)
 530          *      SP (Auto Neg. Speed for PC)
 531          *      LL (Link Status for LAN)
 532          *      LP (Link Status for PC)
 533          *      DL (Duplex Status for LAN)
 534          *      DP (Duplex Status for PC)
 535          *      PL (Auto Neg. Pause Status for LAN)
 536          *      PP (Auto Neg. Pause Status for PC)
 537          */
 538         SW_WRITE_REG (INCA_IP_Switch_EPHY, 0xff);
 539
 540         /* MDIO_ACC:
 541          *      RA (Request/Ack)  0x01 (Request)
 542          *      RW (Read/Write)   0x01 (Write)
 543          *      PHY_ADDR          0x05 (PC)
 544          *      REG_ADDR          0x00 (PHY_BCR: basic control register)
 545          *      PHY_DATA          0x8000
 546          *                    Reset                   - software reset
 547          *                    LB (loop back)          - normal
 548          *                    SS (speed select)       - 10 Mbit/s
 549          *                    ANE (auto neg. enable)  - enable
 550          *                    PD (power down)         - normal
 551          *                    ISO (isolate)           - normal
 552          *                    RAN (restart auto neg.) - normal
 553          *                    DM (duplex mode)        - half duplex
 554          *                    CT (collision test)     - enable
 555          */
 556         SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC, 0xc0a09000);
 557
 558         /* MDIO_ACC:
 559          *      RA (Request/Ack)  0x01 (Request)
 560          *      RW (Read/Write)   0x01 (Write)
 561          *      PHY_ADDR          0x06 (LAN)
 562          *      REG_ADDR          0x00 (PHY_BCR: basic control register)
 563          *      PHY_DATA          0x8000
 564          *                    Reset                   - software reset
 565          *                    LB (loop back)          - normal
 566          *                    SS (speed select)       - 10 Mbit/s
 567          *                    ANE (auto neg. enable)  - enable
 568          *                    PD (power down)         - normal
 569          *                    ISO (isolate)           - normal
 570          *                    RAN (restart auto neg.) - normal
 571          *                    DM (duplex mode)        - half duplex
 572          *                    CT (collision test)     - enable
 573          */
 574         SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC, 0xc0c09000);
 575
 576 #endif
 577
 578         /* Make sure the CPU port is disabled for now. We
 579          * don't want packets to get stacked for us until
 580          * we enable DMA and are prepared to receive them.
 581          */
 582         SW_WRITE_REG(INCA_IP_Switch_ST_PT,0xf);
 583
 584         SW_READ_REG(INCA_IP_Switch_ARL_CTL, regValue);
 585
 586         /* CRC GEN is enabled.
 587          */
 588         regValue |= 0x00000200;
 589         SW_WRITE_REG(INCA_IP_Switch_ARL_CTL, regValue);
 590
 591         /* ADD TAG is disabled.
 592          */
 593         SW_READ_REG(INCA_IP_Switch_PMAC_HD_CTL, regValue);
 594         regValue &= ~0x00000002;
 595         SW_WRITE_REG(INCA_IP_Switch_PMAC_HD_CTL, regValue);
 596 }
 597
 598
 599 static void inca_dma_init(void)
 600 {
 601         /* Switch off all DMA channels.
 602          */
 603         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF);
 604         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR1, INCA_IP_DMA_DMA_RXCCR1_OFF);
 605
 606         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF);
 607         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR1, INCA_IP_DMA_DMA_TXCCR1_OFF);
 608         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR2, INCA_IP_DMA_DMA_TXCCR2_OFF);
 609
 610         /* Setup TX channel polling time.
 611          */
 612         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXPOLL, INCA_DMA_TX_POLLING_TIME);
 613
 614         /* Setup RX channel polling time.
 615          */
 616         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXPOLL, INCA_DMA_RX_POLLING_TIME);
 617
 618         /* ERRATA: write reset value into the DMA RX IMR register.
 619          */
 620         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXIMR, 0xFFFFFFFF);
 621
 622         /* Just in case: disable all transmit interrupts also.
 623          */
 624         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXIMR, 0xFFFFFFFF);
 625
 626         DMA_WRITE_REG(INCA_IP_DMA_DMA_TXISR, 0xFFFFFFFF);
 627         DMA_WRITE_REG(INCA_IP_DMA_DMA_RXISR, 0xFFFFFFFF);
 628 }
 629
 630 #if defined(CONFIG_INCA_IP_SWITCH_AMDIX)
 631 static int inca_amdix(void)
 632 {
 633         u32 phyReg1 = 0;
 634         u32 phyReg4 = 0;
 635         u32 phyReg5 = 0;
 636         u32 phyReg6 = 0;
 637         u32 phyReg31 = 0;
 638         u32 regEphy = 0;
 639         int mdi_flag;
 640         int retries;
 641
 642         /* Setup GPIO pins.
 643          */
 644         *INCA_IP_AUTO_MDIX_LAN_PORTS_DIR    |= (1 << INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX);
 645         *INCA_IP_AUTO_MDIX_LAN_PORTS_ALTSEL |= (1 << INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX);
 646
 647 #if 0
 648         /* Wait for signal.
 649          */
 650         retries = WAIT_SIGNAL_RETRIES;
 651         while (--retries) {
 652                 SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 653                                 (0x1 << 31) |   /* RA           */
 654                                 (0x0 << 30) |   /* Read         */
 655                                 (0x6 << 21) |   /* LAN          */
 656                                 (17  << 16));   /* PHY_MCSR     */
 657                 do {
 658                         SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg1);
 659                 } while (phyReg1 & (1 << 31));
 660
 661                 if (phyReg1 & (1 << 1)) {
 662                         /* Signal detected */
 663                         break;
 664                 }
 665         }
 666
 667         if (!retries)
 668                 goto Fail;
 669 #endif
 670
 671         /* Set MDI mode.
 672          */
 673         *INCA_IP_AUTO_MDIX_LAN_PORTS_OUT &= ~(1 << INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX);
 674         mdi_flag = 1;
 675
 676         /* Wait for link.
 677          */
 678         retries = WAIT_LINK_RETRIES;
 679         while (--retries) {
 680                 udelay(LINK_RETRY_DELAY * 1000);
 681                 SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 682                                 (0x1 << 31) |   /* RA           */
 683                                 (0x0 << 30) |   /* Read         */
 684                                 (0x6 << 21) |   /* LAN          */
 685                                 (1   << 16));   /* PHY_BSR      */
 686                 do {
 687                         SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg1);
 688                 } while (phyReg1 & (1 << 31));
 689
 690                 if (phyReg1 & (1 << 2)) {
 691                         /* Link is up */
 692                         break;
 693                 } else if (mdi_flag) {
 694                         /* Set MDIX mode */
 695                         *INCA_IP_AUTO_MDIX_LAN_PORTS_OUT |= (1 << INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX);
 696                         mdi_flag = 0;
 697                 } else {
 698                         /* Set MDI mode */
 699                         *INCA_IP_AUTO_MDIX_LAN_PORTS_OUT &= ~(1 << INCA_IP_AUTO_MDIX_LAN_GPIO_PIN_RXTX);
 700                         mdi_flag = 1;
 701                 }
 702         }
 703
 704         if (!retries) {
 705                 goto Fail;
 706         } else {
 707                 SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 708                                 (0x1 << 31) |   /* RA           */
 709                                 (0x0 << 30) |   /* Read         */
 710                                 (0x6 << 21) |   /* LAN          */
 711                                 (1   << 16));   /* PHY_BSR      */
 712                 do {
 713                         SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg1);
 714                 } while (phyReg1 & (1 << 31));
 715
 716                 /* Auto-negotiation / Parallel detection complete
 717                  */
 718                 if (phyReg1 & (1 << 5)) {
 719                         SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 720                                 (0x1 << 31) |   /* RA           */
 721                                 (0x0 << 30) |   /* Read         */
 722                                 (0x6 << 21) |   /* LAN          */
 723                                 (31  << 16));   /* PHY_SCSR     */
 724                         do {
 725                                 SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg31);
 726                         } while (phyReg31 & (1 << 31));
 727
 728                         switch ((phyReg31 >> 2) & 0x7) {
 729                         case INCA_SWITCH_PHY_SPEED_10H:
 730                                 /* 10Base-T Half-duplex */
 731                                 regEphy = 0;
 732                                 break;
 733                         case INCA_SWITCH_PHY_SPEED_10F:
 734                                 /* 10Base-T Full-duplex */
 735                                 regEphy = INCA_IP_Switch_EPHY_DL;
 736                                 break;
 737                         case INCA_SWITCH_PHY_SPEED_100H:
 738                                 /* 100Base-TX Half-duplex */
 739                                 regEphy = INCA_IP_Switch_EPHY_SL;
 740                                 break;
 741                         case INCA_SWITCH_PHY_SPEED_100F:
 742                                 /* 100Base-TX Full-duplex */
 743                                 regEphy = INCA_IP_Switch_EPHY_SL | INCA_IP_Switch_EPHY_DL;
 744                                 break;
 745                         }
 746
 747                         /* In case of Auto-negotiation,
 748                          * update the negotiated PAUSE support status
 749                          */
 750                         if (phyReg1 & (1 << 3)) {
 751                                 SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 752                                         (0x1 << 31) |   /* RA           */
 753                                         (0x0 << 30) |   /* Read         */
 754                                         (0x6 << 21) |   /* LAN          */
 755                                         (6   << 16));   /* MII_EXPANSION        */
 756                                 do {
 757                                         SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg6);
 758                                 } while (phyReg6 & (1 << 31));
 759
 760                                 /* We are Autoneg-able.
 761                                  * Is Link partner also able to autoneg?
 762                                  */
 763                                 if (phyReg6 & (1 << 0)) {
 764                                         SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 765                                                 (0x1 << 31) |   /* RA           */
 766                                                 (0x0 << 30) |   /* Read         */
 767                                                 (0x6 << 21) |   /* LAN          */
 768                                                 (4   << 16));   /* MII_ADVERTISE        */
 769                                         do {
 770                                                 SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg4);
 771                                         } while (phyReg4 & (1 << 31));
 772
 773                                         /* We advertise PAUSE capab.
 774                                          * Does link partner also advertise it?
 775                                          */
 776                                         if (phyReg4 & (1 << 10)) {
 777                                                 SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC,
 778                                                         (0x1 << 31) |   /* RA           */
 779                                                         (0x0 << 30) |   /* Read         */
 780                                                         (0x6 << 21) |   /* LAN          */
 781                                                         (5   << 16));   /* MII_LPA      */
 782                                                 do {
 783                                                         SW_READ_REG(INCA_IP_Switch_MDIO_ACC, phyReg5);
 784                                                 } while (phyReg5 & (1 << 31));
 785
 786                                                 /* Link partner is PAUSE capab.
 787                                                  */
 788                                                 if (phyReg5 & (1 << 10)) {
 789                                                         regEphy |= INCA_IP_Switch_EPHY_PL;
 790                                                 }
 791                                         }
 792                                 }
 793
 794                         }
 795
 796                         /* Link is up */
 797                         regEphy |= INCA_IP_Switch_EPHY_LL;
 798
 799                         SW_WRITE_REG(INCA_IP_Switch_EPHY, regEphy);
 800                 }
 801         }
 802
 803         return 0;
 804
 805 Fail:
 806         printf("No Link on LAN port\n");
 807         return -1;
 808 }
 809 #endif /* CONFIG_INCA_IP_SWITCH_AMDIX */