1 /* 2 * (C) Copyright 2002 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 #include <malloc.h> 26 #include <net.h> 27 #include <netdev.h> 28 #include <asm/io.h> 29 #include <pci.h> 30 #include <miiphy.h> 31 32 #undef DEBUG 33 34 /* Ethernet chip registers. 35 */ 36 #define SCBStatus 0 /* Rx/Command Unit Status *Word* */ 37 #define SCBIntAckByte 1 /* Rx/Command Unit STAT/ACK byte */ 38 #define SCBCmd 2 /* Rx/Command Unit Command *Word* */ 39 #define SCBIntrCtlByte 3 /* Rx/Command Unit Intr.Control Byte */ 40 #define SCBPointer 4 /* General purpose pointer. */ 41 #define SCBPort 8 /* Misc. commands and operands. */ 42 #define SCBflash 12 /* Flash memory control. */ 43 #define SCBeeprom 14 /* EEPROM memory control. */ 44 #define SCBCtrlMDI 16 /* MDI interface control. */ 45 #define SCBEarlyRx 20 /* Early receive byte count. */ 46 #define SCBGenControl 28 /* 82559 General Control Register */ 47 #define SCBGenStatus 29 /* 82559 General Status register */ 48 49 /* 82559 SCB status word defnitions 50 */ 51 #define SCB_STATUS_CX 0x8000 /* CU finished command (transmit) */ 52 #define SCB_STATUS_FR 0x4000 /* frame received */ 53 #define SCB_STATUS_CNA 0x2000 /* CU left active state */ 54 #define SCB_STATUS_RNR 0x1000 /* receiver left ready state */ 55 #define SCB_STATUS_MDI 0x0800 /* MDI read/write cycle done */ 56 #define SCB_STATUS_SWI 0x0400 /* software generated interrupt */ 57 #define SCB_STATUS_FCP 0x0100 /* flow control pause interrupt */ 58 59 #define SCB_INTACK_MASK 0xFD00 /* all the above */ 60 61 #define SCB_INTACK_TX (SCB_STATUS_CX | SCB_STATUS_CNA) 62 #define SCB_INTACK_RX (SCB_STATUS_FR | SCB_STATUS_RNR) 63 64 /* System control block commands 65 */ 66 /* CU Commands */ 67 #define CU_NOP 0x0000 68 #define CU_START 0x0010 69 #define CU_RESUME 0x0020 70 #define CU_STATSADDR 0x0040 /* Load Dump Statistics ctrs addr */ 71 #define CU_SHOWSTATS 0x0050 /* Dump statistics counters. */ 72 #define CU_ADDR_LOAD 0x0060 /* Base address to add to CU commands */ 73 #define CU_DUMPSTATS 0x0070 /* Dump then reset stats counters. */ 74 75 /* RUC Commands */ 76 #define RUC_NOP 0x0000 77 #define RUC_START 0x0001 78 #define RUC_RESUME 0x0002 79 #define RUC_ABORT 0x0004 80 #define RUC_ADDR_LOAD 0x0006 /* (seems not to clear on acceptance) */ 81 #define RUC_RESUMENR 0x0007 82 83 #define CU_CMD_MASK 0x00f0 84 #define RU_CMD_MASK 0x0007 85 86 #define SCB_M 0x0100 /* 0 = enable interrupt, 1 = disable */ 87 #define SCB_SWI 0x0200 /* 1 - cause device to interrupt */ 88 89 #define CU_STATUS_MASK 0x00C0 90 #define RU_STATUS_MASK 0x003C 91 92 #define RU_STATUS_IDLE (0<<2) 93 #define RU_STATUS_SUS (1<<2) 94 #define RU_STATUS_NORES (2<<2) 95 #define RU_STATUS_READY (4<<2) 96 #define RU_STATUS_NO_RBDS_SUS ((1<<2)|(8<<2)) 97 #define RU_STATUS_NO_RBDS_NORES ((2<<2)|(8<<2)) 98 #define RU_STATUS_NO_RBDS_READY ((4<<2)|(8<<2)) 99 100 /* 82559 Port interface commands. 101 */ 102 #define I82559_RESET 0x00000000 /* Software reset */ 103 #define I82559_SELFTEST 0x00000001 /* 82559 Selftest command */ 104 #define I82559_SELECTIVE_RESET 0x00000002 105 #define I82559_DUMP 0x00000003 106 #define I82559_DUMP_WAKEUP 0x00000007 107 108 /* 82559 Eeprom interface. 109 */ 110 #define EE_SHIFT_CLK 0x01 /* EEPROM shift clock. */ 111 #define EE_CS 0x02 /* EEPROM chip select. */ 112 #define EE_DATA_WRITE 0x04 /* EEPROM chip data in. */ 113 #define EE_WRITE_0 0x01 114 #define EE_WRITE_1 0x05 115 #define EE_DATA_READ 0x08 /* EEPROM chip data out. */ 116 #define EE_ENB (0x4800 | EE_CS) 117 #define EE_CMD_BITS 3 118 #define EE_DATA_BITS 16 119 120 /* The EEPROM commands include the alway-set leading bit. 121 */ 122 #define EE_EWENB_CMD (4 << addr_len) 123 #define EE_WRITE_CMD (5 << addr_len) 124 #define EE_READ_CMD (6 << addr_len) 125 #define EE_ERASE_CMD (7 << addr_len) 126 127 /* Receive frame descriptors. 128 */ 129 struct RxFD { 130 volatile u16 status; 131 volatile u16 control; 132 volatile u32 link; /* struct RxFD * */ 133 volatile u32 rx_buf_addr; /* void * */ 134 volatile u32 count; 135 136 volatile u8 data[PKTSIZE_ALIGN]; 137 }; 138 139 #define RFD_STATUS_C 0x8000 /* completion of received frame */ 140 #define RFD_STATUS_OK 0x2000 /* frame received with no errors */ 141 142 #define RFD_CONTROL_EL 0x8000 /* 1=last RFD in RFA */ 143 #define RFD_CONTROL_S 0x4000 /* 1=suspend RU after receiving frame */ 144 #define RFD_CONTROL_H 0x0010 /* 1=RFD is a header RFD */ 145 #define RFD_CONTROL_SF 0x0008 /* 0=simplified, 1=flexible mode */ 146 147 #define RFD_COUNT_MASK 0x3fff 148 #define RFD_COUNT_F 0x4000 149 #define RFD_COUNT_EOF 0x8000 150 151 #define RFD_RX_CRC 0x0800 /* crc error */ 152 #define RFD_RX_ALIGNMENT 0x0400 /* alignment error */ 153 #define RFD_RX_RESOURCE 0x0200 /* out of space, no resources */ 154 #define RFD_RX_DMA_OVER 0x0100 /* DMA overrun */ 155 #define RFD_RX_SHORT 0x0080 /* short frame error */ 156 #define RFD_RX_LENGTH 0x0020 157 #define RFD_RX_ERROR 0x0010 /* receive error */ 158 #define RFD_RX_NO_ADR_MATCH 0x0004 /* no address match */ 159 #define RFD_RX_IA_MATCH 0x0002 /* individual address does not match */ 160 #define RFD_RX_TCO 0x0001 /* TCO indication */ 161 162 /* Transmit frame descriptors 163 */ 164 struct TxFD { /* Transmit frame descriptor set. */ 165 volatile u16 status; 166 volatile u16 command; 167 volatile u32 link; /* void * */ 168 volatile u32 tx_desc_addr; /* Always points to the tx_buf_addr element. */ 169 volatile s32 count; 170 171 volatile u32 tx_buf_addr0; /* void *, frame to be transmitted. */ 172 volatile s32 tx_buf_size0; /* Length of Tx frame. */ 173 volatile u32 tx_buf_addr1; /* void *, frame to be transmitted. */ 174 volatile s32 tx_buf_size1; /* Length of Tx frame. */ 175 }; 176 177 #define TxCB_CMD_TRANSMIT 0x0004 /* transmit command */ 178 #define TxCB_CMD_SF 0x0008 /* 0=simplified, 1=flexible mode */ 179 #define TxCB_CMD_NC 0x0010 /* 0=CRC insert by controller */ 180 #define TxCB_CMD_I 0x2000 /* generate interrupt on completion */ 181 #define TxCB_CMD_S 0x4000 /* suspend on completion */ 182 #define TxCB_CMD_EL 0x8000 /* last command block in CBL */ 183 184 #define TxCB_COUNT_MASK 0x3fff 185 #define TxCB_COUNT_EOF 0x8000 186 187 /* The Speedo3 Rx and Tx frame/buffer descriptors. 188 */ 189 struct descriptor { /* A generic descriptor. */ 190 volatile u16 status; 191 volatile u16 command; 192 volatile u32 link; /* struct descriptor * */ 193 194 unsigned char params[0]; 195 }; 196 197 #define CONFIG_SYS_CMD_EL 0x8000 198 #define CONFIG_SYS_CMD_SUSPEND 0x4000 199 #define CONFIG_SYS_CMD_INT 0x2000 200 #define CONFIG_SYS_CMD_IAS 0x0001 /* individual address setup */ 201 #define CONFIG_SYS_CMD_CONFIGURE 0x0002 /* configure */ 202 203 #define CONFIG_SYS_STATUS_C 0x8000 204 #define CONFIG_SYS_STATUS_OK 0x2000 205 206 /* Misc. 207 */ 208 #define NUM_RX_DESC PKTBUFSRX 209 #define NUM_TX_DESC 1 /* Number of TX descriptors */ 210 211 #define TOUT_LOOP 1000000 212 213 #define ETH_ALEN 6 214 215 static struct RxFD rx_ring[NUM_RX_DESC]; /* RX descriptor ring */ 216 static struct TxFD tx_ring[NUM_TX_DESC]; /* TX descriptor ring */ 217 static int rx_next; /* RX descriptor ring pointer */ 218 static int tx_next; /* TX descriptor ring pointer */ 219 static int tx_threshold; 220 221 /* 222 * The parameters for a CmdConfigure operation. 223 * There are so many options that it would be difficult to document 224 * each bit. We mostly use the default or recommended settings. 225 */ 226 static const char i82557_config_cmd[] = { 227 22, 0x08, 0, 0, 0, 0, 0x32, 0x03, 1, /* 1=Use MII 0=Use AUI */ 228 0, 0x2E, 0, 0x60, 0, 229 0xf2, 0x48, 0, 0x40, 0xf2, 0x80, /* 0x40=Force full-duplex */ 230 0x3f, 0x05, 231 }; 232 static const char i82558_config_cmd[] = { 233 22, 0x08, 0, 1, 0, 0, 0x22, 0x03, 1, /* 1=Use MII 0=Use AUI */ 234 0, 0x2E, 0, 0x60, 0x08, 0x88, 235 0x68, 0, 0x40, 0xf2, 0x84, /* Disable FC */ 236 0x31, 0x05, 237 }; 238 239 static void init_rx_ring (struct eth_device *dev); 240 static void purge_tx_ring (struct eth_device *dev); 241 242 static void read_hw_addr (struct eth_device *dev, bd_t * bis); 243 244 static int eepro100_init (struct eth_device *dev, bd_t * bis); 245 static int eepro100_send(struct eth_device *dev, void *packet, int length); 246 static int eepro100_recv (struct eth_device *dev); 247 static void eepro100_halt (struct eth_device *dev); 248 249 #if defined(CONFIG_E500) || defined(CONFIG_DB64360) || defined(CONFIG_DB64460) 250 #define bus_to_phys(a) (a) 251 #define phys_to_bus(a) (a) 252 #else 253 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a) 254 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a) 255 #endif 256 257 static inline int INW (struct eth_device *dev, u_long addr) 258 { 259 return le16_to_cpu (*(volatile u16 *) (addr + dev->iobase)); 260 } 261 262 static inline void OUTW (struct eth_device *dev, int command, u_long addr) 263 { 264 *(volatile u16 *) ((addr + dev->iobase)) = cpu_to_le16 (command); 265 } 266 267 static inline void OUTL (struct eth_device *dev, int command, u_long addr) 268 { 269 *(volatile u32 *) ((addr + dev->iobase)) = cpu_to_le32 (command); 270 } 271 272 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 273 static inline int INL (struct eth_device *dev, u_long addr) 274 { 275 return le32_to_cpu (*(volatile u32 *) (addr + dev->iobase)); 276 } 277 278 static int get_phyreg (struct eth_device *dev, unsigned char addr, 279 unsigned char reg, unsigned short *value) 280 { 281 int cmd; 282 int timeout = 50; 283 284 /* read requested data */ 285 cmd = (2 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16); 286 OUTL (dev, cmd, SCBCtrlMDI); 287 288 do { 289 udelay(1000); 290 cmd = INL (dev, SCBCtrlMDI); 291 } while (!(cmd & (1 << 28)) && (--timeout)); 292 293 if (timeout == 0) 294 return -1; 295 296 *value = (unsigned short) (cmd & 0xffff); 297 298 return 0; 299 } 300 301 static int set_phyreg (struct eth_device *dev, unsigned char addr, 302 unsigned char reg, unsigned short value) 303 { 304 int cmd; 305 int timeout = 50; 306 307 /* write requested data */ 308 cmd = (1 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16); 309 OUTL (dev, cmd | value, SCBCtrlMDI); 310 311 while (!(INL (dev, SCBCtrlMDI) & (1 << 28)) && (--timeout)) 312 udelay(1000); 313 314 if (timeout == 0) 315 return -1; 316 317 return 0; 318 } 319 320 /* Check if given phyaddr is valid, i.e. there is a PHY connected. 321 * Do this by checking model value field from ID2 register. 322 */ 323 static struct eth_device* verify_phyaddr (const char *devname, 324 unsigned char addr) 325 { 326 struct eth_device *dev; 327 unsigned short value; 328 unsigned char model; 329 330 dev = eth_get_dev_by_name(devname); 331 if (dev == NULL) { 332 printf("%s: no such device\n", devname); 333 return NULL; 334 } 335 336 /* read id2 register */ 337 if (get_phyreg(dev, addr, MII_PHYSID2, &value) != 0) { 338 printf("%s: mii read timeout!\n", devname); 339 return NULL; 340 } 341 342 /* get model */ 343 model = (unsigned char)((value >> 4) & 0x003f); 344 345 if (model == 0) { 346 printf("%s: no PHY at address %d\n", devname, addr); 347 return NULL; 348 } 349 350 return dev; 351 } 352 353 static int eepro100_miiphy_read(const char *devname, unsigned char addr, 354 unsigned char reg, unsigned short *value) 355 { 356 struct eth_device *dev; 357 358 dev = verify_phyaddr(devname, addr); 359 if (dev == NULL) 360 return -1; 361 362 if (get_phyreg(dev, addr, reg, value) != 0) { 363 printf("%s: mii read timeout!\n", devname); 364 return -1; 365 } 366 367 return 0; 368 } 369 370 static int eepro100_miiphy_write(const char *devname, unsigned char addr, 371 unsigned char reg, unsigned short value) 372 { 373 struct eth_device *dev; 374 375 dev = verify_phyaddr(devname, addr); 376 if (dev == NULL) 377 return -1; 378 379 if (set_phyreg(dev, addr, reg, value) != 0) { 380 printf("%s: mii write timeout!\n", devname); 381 return -1; 382 } 383 384 return 0; 385 } 386 387 #endif 388 389 /* Wait for the chip get the command. 390 */ 391 static int wait_for_eepro100 (struct eth_device *dev) 392 { 393 int i; 394 395 for (i = 0; INW (dev, SCBCmd) & (CU_CMD_MASK | RU_CMD_MASK); i++) { 396 if (i >= TOUT_LOOP) { 397 return 0; 398 } 399 } 400 401 return 1; 402 } 403 404 static struct pci_device_id supported[] = { 405 {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82557}, 406 {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559}, 407 {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559ER}, 408 {} 409 }; 410 411 int eepro100_initialize (bd_t * bis) 412 { 413 pci_dev_t devno; 414 int card_number = 0; 415 struct eth_device *dev; 416 u32 iobase, status; 417 int idx = 0; 418 419 while (1) { 420 /* Find PCI device 421 */ 422 if ((devno = pci_find_devices (supported, idx++)) < 0) { 423 break; 424 } 425 426 pci_read_config_dword (devno, PCI_BASE_ADDRESS_0, &iobase); 427 iobase &= ~0xf; 428 429 #ifdef DEBUG 430 printf ("eepro100: Intel i82559 PCI EtherExpressPro @0x%x\n", 431 iobase); 432 #endif 433 434 pci_write_config_dword (devno, 435 PCI_COMMAND, 436 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 437 438 /* Check if I/O accesses and Bus Mastering are enabled. 439 */ 440 pci_read_config_dword (devno, PCI_COMMAND, &status); 441 if (!(status & PCI_COMMAND_MEMORY)) { 442 printf ("Error: Can not enable MEM access.\n"); 443 continue; 444 } 445 446 if (!(status & PCI_COMMAND_MASTER)) { 447 printf ("Error: Can not enable Bus Mastering.\n"); 448 continue; 449 } 450 451 dev = (struct eth_device *) malloc (sizeof *dev); 452 if (!dev) { 453 printf("eepro100: Can not allocate memory\n"); 454 break; 455 } 456 memset(dev, 0, sizeof(*dev)); 457 458 sprintf (dev->name, "i82559#%d", card_number); 459 dev->priv = (void *) devno; /* this have to come before bus_to_phys() */ 460 dev->iobase = bus_to_phys (iobase); 461 dev->init = eepro100_init; 462 dev->halt = eepro100_halt; 463 dev->send = eepro100_send; 464 dev->recv = eepro100_recv; 465 466 eth_register (dev); 467 468 #if defined (CONFIG_MII) || defined(CONFIG_CMD_MII) 469 /* register mii command access routines */ 470 miiphy_register(dev->name, 471 eepro100_miiphy_read, eepro100_miiphy_write); 472 #endif 473 474 card_number++; 475 476 /* Set the latency timer for value. 477 */ 478 pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20); 479 480 udelay (10 * 1000); 481 482 read_hw_addr (dev, bis); 483 } 484 485 return card_number; 486 } 487 488 489 static int eepro100_init (struct eth_device *dev, bd_t * bis) 490 { 491 int i, status = -1; 492 int tx_cur; 493 struct descriptor *ias_cmd, *cfg_cmd; 494 495 /* Reset the ethernet controller 496 */ 497 OUTL (dev, I82559_SELECTIVE_RESET, SCBPort); 498 udelay (20); 499 500 OUTL (dev, I82559_RESET, SCBPort); 501 udelay (20); 502 503 if (!wait_for_eepro100 (dev)) { 504 printf ("Error: Can not reset ethernet controller.\n"); 505 goto Done; 506 } 507 OUTL (dev, 0, SCBPointer); 508 OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd); 509 510 if (!wait_for_eepro100 (dev)) { 511 printf ("Error: Can not reset ethernet controller.\n"); 512 goto Done; 513 } 514 OUTL (dev, 0, SCBPointer); 515 OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd); 516 517 /* Initialize Rx and Tx rings. 518 */ 519 init_rx_ring (dev); 520 purge_tx_ring (dev); 521 522 /* Tell the adapter where the RX ring is located. 523 */ 524 if (!wait_for_eepro100 (dev)) { 525 printf ("Error: Can not reset ethernet controller.\n"); 526 goto Done; 527 } 528 529 OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer); 530 OUTW (dev, SCB_M | RUC_START, SCBCmd); 531 532 /* Send the Configure frame */ 533 tx_cur = tx_next; 534 tx_next = ((tx_next + 1) % NUM_TX_DESC); 535 536 cfg_cmd = (struct descriptor *) &tx_ring[tx_cur]; 537 cfg_cmd->command = cpu_to_le16 ((CONFIG_SYS_CMD_SUSPEND | CONFIG_SYS_CMD_CONFIGURE)); 538 cfg_cmd->status = 0; 539 cfg_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); 540 541 memcpy (cfg_cmd->params, i82558_config_cmd, 542 sizeof (i82558_config_cmd)); 543 544 if (!wait_for_eepro100 (dev)) { 545 printf ("Error---CONFIG_SYS_CMD_CONFIGURE: Can not reset ethernet controller.\n"); 546 goto Done; 547 } 548 549 OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); 550 OUTW (dev, SCB_M | CU_START, SCBCmd); 551 552 for (i = 0; 553 !(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_C); 554 i++) { 555 if (i >= TOUT_LOOP) { 556 printf ("%s: Tx error buffer not ready\n", dev->name); 557 goto Done; 558 } 559 } 560 561 if (!(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_OK)) { 562 printf ("TX error status = 0x%08X\n", 563 le16_to_cpu (tx_ring[tx_cur].status)); 564 goto Done; 565 } 566 567 /* Send the Individual Address Setup frame 568 */ 569 tx_cur = tx_next; 570 tx_next = ((tx_next + 1) % NUM_TX_DESC); 571 572 ias_cmd = (struct descriptor *) &tx_ring[tx_cur]; 573 ias_cmd->command = cpu_to_le16 ((CONFIG_SYS_CMD_SUSPEND | CONFIG_SYS_CMD_IAS)); 574 ias_cmd->status = 0; 575 ias_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); 576 577 memcpy (ias_cmd->params, dev->enetaddr, 6); 578 579 /* Tell the adapter where the TX ring is located. 580 */ 581 if (!wait_for_eepro100 (dev)) { 582 printf ("Error: Can not reset ethernet controller.\n"); 583 goto Done; 584 } 585 586 OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); 587 OUTW (dev, SCB_M | CU_START, SCBCmd); 588 589 for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_C); 590 i++) { 591 if (i >= TOUT_LOOP) { 592 printf ("%s: Tx error buffer not ready\n", 593 dev->name); 594 goto Done; 595 } 596 } 597 598 if (!(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_OK)) { 599 printf ("TX error status = 0x%08X\n", 600 le16_to_cpu (tx_ring[tx_cur].status)); 601 goto Done; 602 } 603 604 status = 0; 605 606 Done: 607 return status; 608 } 609 610 static int eepro100_send(struct eth_device *dev, void *packet, int length) 611 { 612 int i, status = -1; 613 int tx_cur; 614 615 if (length <= 0) { 616 printf ("%s: bad packet size: %d\n", dev->name, length); 617 goto Done; 618 } 619 620 tx_cur = tx_next; 621 tx_next = (tx_next + 1) % NUM_TX_DESC; 622 623 tx_ring[tx_cur].command = cpu_to_le16 ( TxCB_CMD_TRANSMIT | 624 TxCB_CMD_SF | 625 TxCB_CMD_S | 626 TxCB_CMD_EL ); 627 tx_ring[tx_cur].status = 0; 628 tx_ring[tx_cur].count = cpu_to_le32 (tx_threshold); 629 tx_ring[tx_cur].link = 630 cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); 631 tx_ring[tx_cur].tx_desc_addr = 632 cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_cur].tx_buf_addr0)); 633 tx_ring[tx_cur].tx_buf_addr0 = 634 cpu_to_le32 (phys_to_bus ((u_long) packet)); 635 tx_ring[tx_cur].tx_buf_size0 = cpu_to_le32 (length); 636 637 if (!wait_for_eepro100 (dev)) { 638 printf ("%s: Tx error ethernet controller not ready.\n", 639 dev->name); 640 goto Done; 641 } 642 643 /* Send the packet. 644 */ 645 OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); 646 OUTW (dev, SCB_M | CU_START, SCBCmd); 647 648 for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_C); 649 i++) { 650 if (i >= TOUT_LOOP) { 651 printf ("%s: Tx error buffer not ready\n", dev->name); 652 goto Done; 653 } 654 } 655 656 if (!(le16_to_cpu (tx_ring[tx_cur].status) & CONFIG_SYS_STATUS_OK)) { 657 printf ("TX error status = 0x%08X\n", 658 le16_to_cpu (tx_ring[tx_cur].status)); 659 goto Done; 660 } 661 662 status = length; 663 664 Done: 665 return status; 666 } 667 668 static int eepro100_recv (struct eth_device *dev) 669 { 670 u16 status, stat; 671 int rx_prev, length = 0; 672 673 stat = INW (dev, SCBStatus); 674 OUTW (dev, stat & SCB_STATUS_RNR, SCBStatus); 675 676 for (;;) { 677 status = le16_to_cpu (rx_ring[rx_next].status); 678 679 if (!(status & RFD_STATUS_C)) { 680 break; 681 } 682 683 /* Valid frame status. 684 */ 685 if ((status & RFD_STATUS_OK)) { 686 /* A valid frame received. 687 */ 688 length = le32_to_cpu (rx_ring[rx_next].count) & 0x3fff; 689 690 /* Pass the packet up to the protocol 691 * layers. 692 */ 693 NetReceive((u8 *)rx_ring[rx_next].data, length); 694 } else { 695 /* There was an error. 696 */ 697 printf ("RX error status = 0x%08X\n", status); 698 } 699 700 rx_ring[rx_next].control = cpu_to_le16 (RFD_CONTROL_S); 701 rx_ring[rx_next].status = 0; 702 rx_ring[rx_next].count = cpu_to_le32 (PKTSIZE_ALIGN << 16); 703 704 rx_prev = (rx_next + NUM_RX_DESC - 1) % NUM_RX_DESC; 705 rx_ring[rx_prev].control = 0; 706 707 /* Update entry information. 708 */ 709 rx_next = (rx_next + 1) % NUM_RX_DESC; 710 } 711 712 if (stat & SCB_STATUS_RNR) { 713 714 printf ("%s: Receiver is not ready, restart it !\n", dev->name); 715 716 /* Reinitialize Rx ring. 717 */ 718 init_rx_ring (dev); 719 720 if (!wait_for_eepro100 (dev)) { 721 printf ("Error: Can not restart ethernet controller.\n"); 722 goto Done; 723 } 724 725 OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer); 726 OUTW (dev, SCB_M | RUC_START, SCBCmd); 727 } 728 729 Done: 730 return length; 731 } 732 733 static void eepro100_halt (struct eth_device *dev) 734 { 735 /* Reset the ethernet controller 736 */ 737 OUTL (dev, I82559_SELECTIVE_RESET, SCBPort); 738 udelay (20); 739 740 OUTL (dev, I82559_RESET, SCBPort); 741 udelay (20); 742 743 if (!wait_for_eepro100 (dev)) { 744 printf ("Error: Can not reset ethernet controller.\n"); 745 goto Done; 746 } 747 OUTL (dev, 0, SCBPointer); 748 OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd); 749 750 if (!wait_for_eepro100 (dev)) { 751 printf ("Error: Can not reset ethernet controller.\n"); 752 goto Done; 753 } 754 OUTL (dev, 0, SCBPointer); 755 OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd); 756 757 Done: 758 return; 759 } 760 761 /* SROM Read. 762 */ 763 static int read_eeprom (struct eth_device *dev, int location, int addr_len) 764 { 765 unsigned short retval = 0; 766 int read_cmd = location | EE_READ_CMD; 767 int i; 768 769 OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom); 770 OUTW (dev, EE_ENB, SCBeeprom); 771 772 /* Shift the read command bits out. */ 773 for (i = 12; i >= 0; i--) { 774 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; 775 776 OUTW (dev, EE_ENB | dataval, SCBeeprom); 777 udelay (1); 778 OUTW (dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); 779 udelay (1); 780 } 781 OUTW (dev, EE_ENB, SCBeeprom); 782 783 for (i = 15; i >= 0; i--) { 784 OUTW (dev, EE_ENB | EE_SHIFT_CLK, SCBeeprom); 785 udelay (1); 786 retval = (retval << 1) | 787 ((INW (dev, SCBeeprom) & EE_DATA_READ) ? 1 : 0); 788 OUTW (dev, EE_ENB, SCBeeprom); 789 udelay (1); 790 } 791 792 /* Terminate the EEPROM access. */ 793 OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom); 794 return retval; 795 } 796 797 #ifdef CONFIG_EEPRO100_SROM_WRITE 798 int eepro100_write_eeprom (struct eth_device* dev, int location, int addr_len, unsigned short data) 799 { 800 unsigned short dataval; 801 int enable_cmd = 0x3f | EE_EWENB_CMD; 802 int write_cmd = location | EE_WRITE_CMD; 803 int i; 804 unsigned long datalong, tmplong; 805 806 OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); 807 udelay(1); 808 OUTW(dev, EE_ENB, SCBeeprom); 809 810 /* Shift the enable command bits out. */ 811 for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--) 812 { 813 dataval = (enable_cmd & (1 << i)) ? EE_DATA_WRITE : 0; 814 OUTW(dev, EE_ENB | dataval, SCBeeprom); 815 udelay(1); 816 OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); 817 udelay(1); 818 } 819 820 OUTW(dev, EE_ENB, SCBeeprom); 821 udelay(1); 822 OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); 823 udelay(1); 824 OUTW(dev, EE_ENB, SCBeeprom); 825 826 827 /* Shift the write command bits out. */ 828 for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--) 829 { 830 dataval = (write_cmd & (1 << i)) ? EE_DATA_WRITE : 0; 831 OUTW(dev, EE_ENB | dataval, SCBeeprom); 832 udelay(1); 833 OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); 834 udelay(1); 835 } 836 837 /* Write the data */ 838 datalong= (unsigned long) ((((data) & 0x00ff) << 8) | ( (data) >> 8)); 839 840 for (i = 0; i< EE_DATA_BITS; i++) 841 { 842 /* Extract and move data bit to bit DI */ 843 dataval = ((datalong & 0x8000)>>13) ? EE_DATA_WRITE : 0; 844 845 OUTW(dev, EE_ENB | dataval, SCBeeprom); 846 udelay(1); 847 OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); 848 udelay(1); 849 OUTW(dev, EE_ENB | dataval, SCBeeprom); 850 udelay(1); 851 852 datalong = datalong << 1; /* Adjust significant data bit*/ 853 } 854 855 /* Finish up command (toggle CS) */ 856 OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); 857 udelay(1); /* delay for more than 250 ns */ 858 OUTW(dev, EE_ENB, SCBeeprom); 859 860 /* Wait for programming ready (D0 = 1) */ 861 tmplong = 10; 862 do 863 { 864 dataval = INW(dev, SCBeeprom); 865 if (dataval & EE_DATA_READ) 866 break; 867 udelay(10000); 868 } 869 while (-- tmplong); 870 871 if (tmplong == 0) 872 { 873 printf ("Write i82559 eeprom timed out (100 ms waiting for data ready.\n"); 874 return -1; 875 } 876 877 /* Terminate the EEPROM access. */ 878 OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); 879 880 return 0; 881 } 882 #endif 883 884 static void init_rx_ring (struct eth_device *dev) 885 { 886 int i; 887 888 for (i = 0; i < NUM_RX_DESC; i++) { 889 rx_ring[i].status = 0; 890 rx_ring[i].control = 891 (i == NUM_RX_DESC - 1) ? cpu_to_le16 (RFD_CONTROL_S) : 0; 892 rx_ring[i].link = 893 cpu_to_le32 (phys_to_bus 894 ((u32) & rx_ring[(i + 1) % NUM_RX_DESC])); 895 rx_ring[i].rx_buf_addr = 0xffffffff; 896 rx_ring[i].count = cpu_to_le32 (PKTSIZE_ALIGN << 16); 897 } 898 899 rx_next = 0; 900 } 901 902 static void purge_tx_ring (struct eth_device *dev) 903 { 904 int i; 905 906 tx_next = 0; 907 tx_threshold = 0x01208000; 908 909 for (i = 0; i < NUM_TX_DESC; i++) { 910 tx_ring[i].status = 0; 911 tx_ring[i].command = 0; 912 tx_ring[i].link = 0; 913 tx_ring[i].tx_desc_addr = 0; 914 tx_ring[i].count = 0; 915 916 tx_ring[i].tx_buf_addr0 = 0; 917 tx_ring[i].tx_buf_size0 = 0; 918 tx_ring[i].tx_buf_addr1 = 0; 919 tx_ring[i].tx_buf_size1 = 0; 920 } 921 } 922 923 static void read_hw_addr (struct eth_device *dev, bd_t * bis) 924 { 925 u16 sum = 0; 926 int i, j; 927 int addr_len = read_eeprom (dev, 0, 6) == 0xffff ? 8 : 6; 928 929 for (j = 0, i = 0; i < 0x40; i++) { 930 u16 value = read_eeprom (dev, i, addr_len); 931 932 sum += value; 933 if (i < 3) { 934 dev->enetaddr[j++] = value; 935 dev->enetaddr[j++] = value >> 8; 936 } 937 } 938 939 if (sum != 0xBABA) { 940 memset (dev->enetaddr, 0, ETH_ALEN); 941 #ifdef DEBUG 942 printf ("%s: Invalid EEPROM checksum %#4.4x, " 943 "check settings before activating this device!\n", 944 dev->name, sum); 945 #endif 946 } 947 } 948