1/* 2 * dm9000.c: Version 1.2 03/18/2003 3 * 4 * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux. 5 * Copyright (C) 1997 Sten Wang 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved. 18 * 19 * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match 20 * 06/22/2001 Support DM9801 progrmming 21 * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000 22 * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200 23 * R17 = (R17 & 0xfff0) | NF + 3 24 * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200 25 * R17 = (R17 & 0xfff0) | NF 26 * 27 * v1.00 modify by simon 2001.9.5 28 * change for kernel 2.4.x 29 * 30 * v1.1 11/09/2001 fix force mode bug 31 * 32 * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>: 33 * Fixed phy reset. 34 * Added tx/rx 32 bit mode. 35 * Cleaned up for kernel merge. 36 * 37 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de> 38 * Port to 2.6 kernel 39 * 40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk> 41 * Cleanup of code to remove ifdefs 42 * Allowed platform device data to influence access width 43 * Reformatting areas of code 44 * 45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de> 46 * * removed 2.4 style module parameters 47 * * removed removed unused stat counter and fixed 48 * net_device_stats 49 * * introduced tx_timeout function 50 * * reworked locking 51 * 52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk> 53 * * fixed spinlock call without pointer 54 * * ensure spinlock is initialised 55 */ 56 57#include <linux/module.h> 58#include <linux/ioport.h> 59#include <linux/netdevice.h> 60#include <linux/etherdevice.h> 61#include <linux/init.h> 62#include <linux/skbuff.h> 63#include <linux/spinlock.h> 64#include <linux/crc32.h> 65#include <linux/mii.h> 66#include <linux/dm9000.h> 67#include <linux/delay.h> 68#include <linux/platform_device.h> 69 70#include <asm/delay.h> 71#include <asm/irq.h> 72#include <asm/io.h> 73 74#include "dm9000.h" 75 76/* Board/System/Debug information/definition ---------------- */ 77 78#define DM9000_PHY 0x40 /* PHY address 0x01 */ 79 80#define CARDNAME "dm9000" 81#define PFX CARDNAME ": " 82 83#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */ 84 85#define DM9000_DEBUG 0 86 87#if DM9000_DEBUG > 2 88#define PRINTK3(args...) printk(CARDNAME ": " args) 89#else 90#define PRINTK3(args...) do { } while(0) 91#endif 92 93#if DM9000_DEBUG > 1 94#define PRINTK2(args...) printk(CARDNAME ": " args) 95#else 96#define PRINTK2(args...) do { } while(0) 97#endif 98 99#if DM9000_DEBUG > 0 100#define PRINTK1(args...) printk(CARDNAME ": " args) 101#define PRINTK(args...) printk(CARDNAME ": " args) 102#else 103#define PRINTK1(args...) do { } while(0) 104#define PRINTK(args...) printk(KERN_DEBUG args) 105#endif 106 107/* 108 * Transmit timeout, default 5 seconds. 109 */ 110static int watchdog = 5000; 111module_param(watchdog, int, 0400); 112MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); 113 114/* Structure/enum declaration ------------------------------- */ 115typedef struct board_info { 116 117 void __iomem *io_addr; /* Register I/O base address */ 118 void __iomem *io_data; /* Data I/O address */ 119 u16 irq; /* IRQ */ 120 121 u16 tx_pkt_cnt; 122 u16 queue_pkt_len; 123 u16 queue_start_addr; 124 u16 dbug_cnt; 125 u8 io_mode; /* 0:word, 2:byte */ 126 u8 phy_addr; 127 128 void (*inblk)(void __iomem *port, void *data, int length); 129 void (*outblk)(void __iomem *port, void *data, int length); 130 void (*dumpblk)(void __iomem *port, int length); 131 132 struct resource *addr_res; /* resources found */ 133 struct resource *data_res; 134 struct resource *addr_req; /* resources requested */ 135 struct resource *data_req; 136 struct resource *irq_res; 137 138 struct timer_list timer; 139 struct net_device_stats stats; 140 unsigned char srom[128]; 141 spinlock_t lock; 142 143 struct mii_if_info mii; 144 u32 msg_enable; 145} board_info_t; 146 147/* function declaration ------------------------------------- */ 148static int dm9000_probe(struct platform_device *); 149static int dm9000_open(struct net_device *); 150static int dm9000_start_xmit(struct sk_buff *, struct net_device *); 151static int dm9000_stop(struct net_device *); 152 153 154static void dm9000_timer(unsigned long); 155static void dm9000_init_dm9000(struct net_device *); 156 157static struct net_device_stats *dm9000_get_stats(struct net_device *); 158 159static irqreturn_t dm9000_interrupt(int, void *); 160 161static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg); 162static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, 163 int value); 164static u16 read_srom_word(board_info_t *, int); 165static void dm9000_rx(struct net_device *); 166static void dm9000_hash_table(struct net_device *); 167 168//#define DM9000_PROGRAM_EEPROM 169#ifdef DM9000_PROGRAM_EEPROM 170static void program_eeprom(board_info_t * db); 171#endif 172/* DM9000 network board routine ---------------------------- */ 173 174static void 175dm9000_reset(board_info_t * db) 176{ 177 PRINTK1("dm9000x: resetting\n"); 178 /* RESET device */ 179 writeb(DM9000_NCR, db->io_addr); 180 udelay(200); 181 writeb(NCR_RST, db->io_data); 182 udelay(200); 183} 184 185/* 186 * Read a byte from I/O port 187 */ 188static u8 189ior(board_info_t * db, int reg) 190{ 191 writeb(reg, db->io_addr); 192 return readb(db->io_data); 193} 194 195/* 196 * Write a byte to I/O port 197 */ 198 199static void 200iow(board_info_t * db, int reg, int value) 201{ 202 writeb(reg, db->io_addr); 203 writeb(value, db->io_data); 204} 205 206/* routines for sending block to chip */ 207 208static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count) 209{ 210 writesb(reg, data, count); 211} 212 213static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count) 214{ 215 writesw(reg, data, (count+1) >> 1); 216} 217 218static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count) 219{ 220 writesl(reg, data, (count+3) >> 2); 221} 222 223/* input block from chip to memory */ 224 225static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count) 226{ 227 readsb(reg, data, count); 228} 229 230 231static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count) 232{ 233 readsw(reg, data, (count+1) >> 1); 234} 235 236static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count) 237{ 238 readsl(reg, data, (count+3) >> 2); 239} 240 241/* dump block from chip to null */ 242 243static void dm9000_dumpblk_8bit(void __iomem *reg, int count) 244{ 245 int i; 246 int tmp; 247 248 for (i = 0; i < count; i++) 249 tmp = readb(reg); 250} 251 252static void dm9000_dumpblk_16bit(void __iomem *reg, int count) 253{ 254 int i; 255 int tmp; 256 257 count = (count + 1) >> 1; 258 259 for (i = 0; i < count; i++) 260 tmp = readw(reg); 261} 262 263static void dm9000_dumpblk_32bit(void __iomem *reg, int count) 264{ 265 int i; 266 int tmp; 267 268 count = (count + 3) >> 2; 269 270 for (i = 0; i < count; i++) 271 tmp = readl(reg); 272} 273 274/* dm9000_set_io 275 * 276 * select the specified set of io routines to use with the 277 * device 278 */ 279 280static void dm9000_set_io(struct board_info *db, int byte_width) 281{ 282 /* use the size of the data resource to work out what IO 283 * routines we want to use 284 */ 285 286 switch (byte_width) { 287 case 1: 288 db->dumpblk = dm9000_dumpblk_8bit; 289 db->outblk = dm9000_outblk_8bit; 290 db->inblk = dm9000_inblk_8bit; 291 break; 292 293 case 2: 294 db->dumpblk = dm9000_dumpblk_16bit; 295 db->outblk = dm9000_outblk_16bit; 296 db->inblk = dm9000_inblk_16bit; 297 break; 298 299 case 3: 300 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n"); 301 db->dumpblk = dm9000_dumpblk_16bit; 302 db->outblk = dm9000_outblk_16bit; 303 db->inblk = dm9000_inblk_16bit; 304 break; 305 306 case 4: 307 default: 308 db->dumpblk = dm9000_dumpblk_32bit; 309 db->outblk = dm9000_outblk_32bit; 310 db->inblk = dm9000_inblk_32bit; 311 break; 312 } 313} 314 315 316/* Our watchdog timed out. Called by the networking layer */ 317static void dm9000_timeout(struct net_device *dev) 318{ 319 board_info_t *db = (board_info_t *) dev->priv; 320 u8 reg_save; 321 unsigned long flags; 322 323 /* Save previous register address */ 324 reg_save = readb(db->io_addr); 325 spin_lock_irqsave(&db->lock,flags); 326 327 netif_stop_queue(dev); 328 dm9000_reset(db); 329 dm9000_init_dm9000(dev); 330 /* We can accept TX packets again */ 331 dev->trans_start = jiffies; 332 netif_wake_queue(dev); 333 334 /* Restore previous register address */ 335 writeb(reg_save, db->io_addr); 336 spin_unlock_irqrestore(&db->lock,flags); 337} 338 339#ifdef CONFIG_NET_POLL_CONTROLLER 340/* 341 *Used by netconsole 342 */ 343static void dm9000_poll_controller(struct net_device *dev) 344{ 345 disable_irq(dev->irq); 346 dm9000_interrupt(dev->irq,dev); 347 enable_irq(dev->irq); 348} 349#endif 350 351/* dm9000_release_board 352 * 353 * release a board, and any mapped resources 354 */ 355 356static void 357dm9000_release_board(struct platform_device *pdev, struct board_info *db) 358{ 359 if (db->data_res == NULL) { 360 if (db->addr_res != NULL) 361 release_mem_region((unsigned long)db->io_addr, 4); 362 return; 363 } 364 365 /* unmap our resources */ 366 367 iounmap(db->io_addr); 368 iounmap(db->io_data); 369 370 /* release the resources */ 371 372 if (db->data_req != NULL) { 373 release_resource(db->data_req); 374 kfree(db->data_req); 375 } 376 377 if (db->addr_req != NULL) { 378 release_resource(db->addr_req); 379 kfree(db->addr_req); 380 } 381} 382 383#define res_size(_r) (((_r)->end - (_r)->start) + 1) 384 385/* 386 * Search DM9000 board, allocate space and register it 387 */ 388static int 389dm9000_probe(struct platform_device *pdev) 390{ 391 struct dm9000_plat_data *pdata = pdev->dev.platform_data; 392 struct board_info *db; /* Point a board information structure */ 393 struct net_device *ndev; 394 unsigned long base; 395 int ret = 0; 396 int iosize; 397 int i; 398 u32 id_val; 399 400 /* Init network device */ 401 ndev = alloc_etherdev(sizeof (struct board_info)); 402 if (!ndev) { 403 printk("%s: could not allocate device.\n", CARDNAME); 404 return -ENOMEM; 405 } 406 407 SET_MODULE_OWNER(ndev); 408 SET_NETDEV_DEV(ndev, &pdev->dev); 409 410 PRINTK2("dm9000_probe()"); 411 412 /* setup board info structure */ 413 db = (struct board_info *) ndev->priv; 414 memset(db, 0, sizeof (*db)); 415 416 spin_lock_init(&db->lock); 417 418 if (pdev->num_resources < 2) { 419 ret = -ENODEV; 420 goto out; 421 } else if (pdev->num_resources == 2) { 422 base = pdev->resource[0].start; 423 424 if (!request_mem_region(base, 4, ndev->name)) { 425 ret = -EBUSY; 426 goto out; 427 } 428 429 ndev->base_addr = base; 430 ndev->irq = pdev->resource[1].start; 431 db->io_addr = (void __iomem *)base; 432 db->io_data = (void __iomem *)(base + 4); 433 434 } else { 435 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 436 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 437 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 438 439 if (db->addr_res == NULL || db->data_res == NULL || 440 db->irq_res == NULL) { 441 printk(KERN_ERR PFX "insufficient resources\n"); 442 ret = -ENOENT; 443 goto out; 444 } 445 446 i = res_size(db->addr_res); 447 db->addr_req = request_mem_region(db->addr_res->start, i, 448 pdev->name); 449 450 if (db->addr_req == NULL) { 451 printk(KERN_ERR PFX "cannot claim address reg area\n"); 452 ret = -EIO; 453 goto out; 454 } 455 456 db->io_addr = ioremap(db->addr_res->start, i); 457 458 if (db->io_addr == NULL) { 459 printk(KERN_ERR "failed to ioremap address reg\n"); 460 ret = -EINVAL; 461 goto out; 462 } 463 464 iosize = res_size(db->data_res); 465 db->data_req = request_mem_region(db->data_res->start, iosize, 466 pdev->name); 467 468 if (db->data_req == NULL) { 469 printk(KERN_ERR PFX "cannot claim data reg area\n"); 470 ret = -EIO; 471 goto out; 472 } 473 474 db->io_data = ioremap(db->data_res->start, iosize); 475 476 if (db->io_data == NULL) { 477 printk(KERN_ERR "failed to ioremap data reg\n"); 478 ret = -EINVAL; 479 goto out; 480 } 481 482 /* fill in parameters for net-dev structure */ 483 484 ndev->base_addr = (unsigned long)db->io_addr; 485 ndev->irq = db->irq_res->start; 486 487 /* ensure at least we have a default set of IO routines */ 488 dm9000_set_io(db, iosize); 489 } 490 491 /* check to see if anything is being over-ridden */ 492 if (pdata != NULL) { 493 /* check to see if the driver wants to over-ride the 494 * default IO width */ 495 496 if (pdata->flags & DM9000_PLATF_8BITONLY) 497 dm9000_set_io(db, 1); 498 499 if (pdata->flags & DM9000_PLATF_16BITONLY) 500 dm9000_set_io(db, 2); 501 502 if (pdata->flags & DM9000_PLATF_32BITONLY) 503 dm9000_set_io(db, 4); 504 505 /* check to see if there are any IO routine 506 * over-rides */ 507 508 if (pdata->inblk != NULL) 509 db->inblk = pdata->inblk; 510 511 if (pdata->outblk != NULL) 512 db->outblk = pdata->outblk; 513 514 if (pdata->dumpblk != NULL) 515 db->dumpblk = pdata->dumpblk; 516 } 517 518 dm9000_reset(db); 519 520 /* try two times, DM9000 sometimes gets the first read wrong */ 521 for (i = 0; i < 2; i++) { 522 id_val = ior(db, DM9000_VIDL); 523 id_val |= (u32)ior(db, DM9000_VIDH) << 8; 524 id_val |= (u32)ior(db, DM9000_PIDL) << 16; 525 id_val |= (u32)ior(db, DM9000_PIDH) << 24; 526 527 if (id_val == DM9000_ID) 528 break; 529 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val); 530 } 531 532 if (id_val != DM9000_ID) { 533 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val); 534 goto release; 535 } 536 537 /* from this point we assume that we have found a DM9000 */ 538 539 /* driver system function */ 540 ether_setup(ndev); 541 542 ndev->open = &dm9000_open; 543 ndev->hard_start_xmit = &dm9000_start_xmit; 544 ndev->tx_timeout = &dm9000_timeout; 545 ndev->watchdog_timeo = msecs_to_jiffies(watchdog); 546 ndev->stop = &dm9000_stop; 547 ndev->get_stats = &dm9000_get_stats; 548 ndev->set_multicast_list = &dm9000_hash_table; 549#ifdef CONFIG_NET_POLL_CONTROLLER 550 ndev->poll_controller = &dm9000_poll_controller; 551#endif 552 553#ifdef DM9000_PROGRAM_EEPROM 554 program_eeprom(db); 555#endif 556 db->msg_enable = NETIF_MSG_LINK; 557 db->mii.phy_id_mask = 0x1f; 558 db->mii.reg_num_mask = 0x1f; 559 db->mii.force_media = 0; 560 db->mii.full_duplex = 0; 561 db->mii.dev = ndev; 562 db->mii.mdio_read = dm9000_phy_read; 563 db->mii.mdio_write = dm9000_phy_write; 564 565 /* Read SROM content */ 566 for (i = 0; i < 64; i++) 567 ((u16 *) db->srom)[i] = read_srom_word(db, i); 568 569 /* Set Node Address */ 570 for (i = 0; i < 6; i++) 571 ndev->dev_addr[i] = db->srom[i]; 572 573 if (!is_valid_ether_addr(ndev->dev_addr)) { 574 /* try reading from mac */ 575 576 for (i = 0; i < 6; i++) 577 ndev->dev_addr[i] = ior(db, i+DM9000_PAR); 578 } 579 580 if (!is_valid_ether_addr(ndev->dev_addr)) 581 printk("%s: Invalid ethernet MAC address. Please " 582 "set using ifconfig\n", ndev->name); 583 584 platform_set_drvdata(pdev, ndev); 585 ret = register_netdev(ndev); 586 587 if (ret == 0) { 588 printk("%s: dm9000 at %p,%p IRQ %d MAC: ", 589 ndev->name, db->io_addr, db->io_data, ndev->irq); 590 for (i = 0; i < 5; i++) 591 printk("%02x:", ndev->dev_addr[i]); 592 printk("%02x\n", ndev->dev_addr[5]); 593 } 594 return 0; 595 596 release: 597 out: 598 printk("%s: not found (%d).\n", CARDNAME, ret); 599 600 dm9000_release_board(pdev, db); 601 free_netdev(ndev); 602 603 return ret; 604} 605 606/* 607 * Open the interface. 608 * The interface is opened whenever "ifconfig" actives it. 609 */ 610static int 611dm9000_open(struct net_device *dev) 612{ 613 board_info_t *db = (board_info_t *) dev->priv; 614 615 PRINTK2("entering dm9000_open\n"); 616 617 if (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED, dev->name, dev)) 618 return -EAGAIN; 619 620 /* Initialize DM9000 board */ 621 dm9000_reset(db); 622 dm9000_init_dm9000(dev); 623 624 /* Init driver variable */ 625 db->dbug_cnt = 0; 626 627 /* set and active a timer process */ 628 init_timer(&db->timer); 629 db->timer.expires = DM9000_TIMER_WUT; 630 db->timer.data = (unsigned long) dev; 631 db->timer.function = &dm9000_timer; 632 add_timer(&db->timer); 633 634 mii_check_media(&db->mii, netif_msg_link(db), 1); 635 netif_start_queue(dev); 636 637 return 0; 638} 639 640/* 641 * Initilize dm9000 board 642 */ 643static void 644dm9000_init_dm9000(struct net_device *dev) 645{ 646 board_info_t *db = (board_info_t *) dev->priv; 647 648 PRINTK1("entering %s\n",__FUNCTION__); 649 650 /* I/O mode */ 651 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */ 652 653 /* GPIO0 on pre-activate PHY */ 654 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */ 655 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */ 656 iow(db, DM9000_GPR, 0); /* Enable PHY */ 657 658 /* Program operating register */ 659 iow(db, DM9000_TCR, 0); /* TX Polling clear */ 660 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */ 661 iow(db, DM9000_FCR, 0xff); /* Flow Control */ 662 iow(db, DM9000_SMCR, 0); /* Special Mode */ 663 /* clear TX status */ 664 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END); 665 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */ 666 667 /* Set address filter table */ 668 dm9000_hash_table(dev); 669 670 /* Activate DM9000 */ 671 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN); 672 /* Enable TX/RX interrupt mask */ 673 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM); 674 675 /* Init Driver variable */ 676 db->tx_pkt_cnt = 0; 677 db->queue_pkt_len = 0; 678 dev->trans_start = 0; 679} 680 681/* 682 * Hardware start transmission. 683 * Send a packet to media from the upper layer. 684 */ 685static int 686dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev) 687{ 688 board_info_t *db = (board_info_t *) dev->priv; 689 690 PRINTK3("dm9000_start_xmit\n"); 691 692 if (db->tx_pkt_cnt > 1) 693 return 1; 694 695 netif_stop_queue(dev); 696 697 /* Disable all interrupts */ 698 iow(db, DM9000_IMR, IMR_PAR); 699 700 /* Move data to DM9000 TX RAM */ 701 writeb(DM9000_MWCMD, db->io_addr); 702 703 (db->outblk)(db->io_data, skb->data, skb->len); 704 db->stats.tx_bytes += skb->len; 705 706 /* TX control: First packet immediately send, second packet queue */ 707 if (db->tx_pkt_cnt == 0) { 708 709 /* First Packet */ 710 db->tx_pkt_cnt++; 711 712 /* Set TX length to DM9000 */ 713 iow(db, DM9000_TXPLL, skb->len & 0xff); 714 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff); 715 716 /* Issue TX polling command */ 717 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */ 718 719 dev->trans_start = jiffies; /* save the time stamp */ 720 721 } else { 722 /* Second packet */ 723 db->tx_pkt_cnt++; 724 db->queue_pkt_len = skb->len; 725 } 726 727 /* free this SKB */ 728 dev_kfree_skb(skb); 729 730 /* Re-enable resource check */ 731 if (db->tx_pkt_cnt == 1) 732 netif_wake_queue(dev); 733 734 /* Re-enable interrupt */ 735 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM); 736 737 return 0; 738} 739 740static void 741dm9000_shutdown(struct net_device *dev) 742{ 743 board_info_t *db = (board_info_t *) dev->priv; 744 745 /* RESET device */ 746 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */ 747 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */ 748 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */ 749 iow(db, DM9000_RCR, 0x00); /* Disable RX */ 750} 751 752/* 753 * Stop the interface. 754 * The interface is stopped when it is brought. 755 */ 756static int 757dm9000_stop(struct net_device *ndev) 758{ 759 board_info_t *db = (board_info_t *) ndev->priv; 760 761 PRINTK1("entering %s\n",__FUNCTION__); 762 763 /* deleted timer */ 764 del_timer(&db->timer); 765 766 netif_stop_queue(ndev); 767 netif_carrier_off(ndev); 768 769 /* free interrupt */ 770 free_irq(ndev->irq, ndev); 771 772 dm9000_shutdown(ndev); 773 774 return 0; 775} 776 777/* 778 * DM9000 interrupt handler 779 * receive the packet to upper layer, free the transmitted packet 780 */ 781 782static void 783dm9000_tx_done(struct net_device *dev, board_info_t * db) 784{ 785 int tx_status = ior(db, DM9000_NSR); /* Got TX status */ 786 787 if (tx_status & (NSR_TX2END | NSR_TX1END)) { 788 /* One packet sent complete */ 789 db->tx_pkt_cnt--; 790 db->stats.tx_packets++; 791 792 /* Queue packet check & send */ 793 if (db->tx_pkt_cnt > 0) { 794 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff); 795 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff); 796 iow(db, DM9000_TCR, TCR_TXREQ); 797 dev->trans_start = jiffies; 798 } 799 netif_wake_queue(dev); 800 } 801} 802 803static irqreturn_t 804dm9000_interrupt(int irq, void *dev_id) 805{ 806 struct net_device *dev = dev_id; 807 board_info_t *db; 808 int int_status; 809 u8 reg_save; 810 811 PRINTK3("entering %s\n",__FUNCTION__); 812 813 if (!dev) { 814 PRINTK1("dm9000_interrupt() without DEVICE arg\n"); 815 return IRQ_HANDLED; 816 } 817 818 /* A real interrupt coming */ 819 db = (board_info_t *) dev->priv; 820 spin_lock(&db->lock); 821 822 /* Save previous register address */ 823 reg_save = readb(db->io_addr); 824 825 /* Disable all interrupts */ 826 iow(db, DM9000_IMR, IMR_PAR); 827 828 /* Got DM9000 interrupt status */ 829 int_status = ior(db, DM9000_ISR); /* Got ISR */ 830 iow(db, DM9000_ISR, int_status); /* Clear ISR status */ 831 832 /* Received the coming packet */ 833 if (int_status & ISR_PRS) 834 dm9000_rx(dev); 835 836 /* Trnasmit Interrupt check */ 837 if (int_status & ISR_PTS) 838 dm9000_tx_done(dev, db); 839 840 /* Re-enable interrupt mask */ 841 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM); 842 843 /* Restore previous register address */ 844 writeb(reg_save, db->io_addr); 845 846 spin_unlock(&db->lock); 847 848 return IRQ_HANDLED; 849} 850 851/* 852 * Get statistics from driver. 853 */ 854static struct net_device_stats * 855dm9000_get_stats(struct net_device *dev) 856{ 857 board_info_t *db = (board_info_t *) dev->priv; 858 return &db->stats; 859} 860 861 862/* 863 * A periodic timer routine 864 * Dynamic media sense, allocated Rx buffer... 865 */ 866static void 867dm9000_timer(unsigned long data) 868{ 869 struct net_device *dev = (struct net_device *) data; 870 board_info_t *db = (board_info_t *) dev->priv; 871 872 PRINTK3("dm9000_timer()\n"); 873 874 mii_check_media(&db->mii, netif_msg_link(db), 0); 875 876 /* Set timer again */ 877 db->timer.expires = DM9000_TIMER_WUT; 878 add_timer(&db->timer); 879} 880 881struct dm9000_rxhdr { 882 u16 RxStatus; 883 u16 RxLen; 884} __attribute__((__packed__)); 885 886/* 887 * Received a packet and pass to upper layer 888 */ 889static void 890dm9000_rx(struct net_device *dev) 891{ 892 board_info_t *db = (board_info_t *) dev->priv; 893 struct dm9000_rxhdr rxhdr; 894 struct sk_buff *skb; 895 u8 rxbyte, *rdptr; 896 bool GoodPacket; 897 int RxLen; 898 899 /* Check packet ready or not */ 900 do { 901 ior(db, DM9000_MRCMDX); /* Dummy read */ 902 903 /* Get most updated data */ 904 rxbyte = readb(db->io_data); 905 906 /* Status check: this byte must be 0 or 1 */ 907 if (rxbyte > DM9000_PKT_RDY) { 908 printk("status check failed: %d\n", rxbyte); 909 iow(db, DM9000_RCR, 0x00); /* Stop Device */ 910 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */ 911 return; 912 } 913 914 if (rxbyte != DM9000_PKT_RDY) 915 return; 916 917 /* A packet ready now & Get status/length */ 918 GoodPacket = true; 919 writeb(DM9000_MRCMD, db->io_addr); 920 921 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr)); 922 923 RxLen = rxhdr.RxLen; 924 925 /* Packet Status check */ 926 if (RxLen < 0x40) { 927 GoodPacket = false; 928 PRINTK1("Bad Packet received (runt)\n"); 929 } 930 931 if (RxLen > DM9000_PKT_MAX) { 932 PRINTK1("RST: RX Len:%x\n", RxLen); 933 } 934 935 if (rxhdr.RxStatus & 0xbf00) { 936 GoodPacket = false; 937 if (rxhdr.RxStatus & 0x100) { 938 PRINTK1("fifo error\n"); 939 db->stats.rx_fifo_errors++; 940 } 941 if (rxhdr.RxStatus & 0x200) { 942 PRINTK1("crc error\n"); 943 db->stats.rx_crc_errors++; 944 } 945 if (rxhdr.RxStatus & 0x8000) { 946 PRINTK1("length error\n"); 947 db->stats.rx_length_errors++; 948 } 949 } 950 951 /* Move data from DM9000 */ 952 if (GoodPacket 953 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) { 954 skb_reserve(skb, 2); 955 rdptr = (u8 *) skb_put(skb, RxLen - 4); 956 957 /* Read received packet from RX SRAM */ 958 959 (db->inblk)(db->io_data, rdptr, RxLen); 960 db->stats.rx_bytes += RxLen; 961 962 /* Pass to upper layer */ 963 skb->protocol = eth_type_trans(skb, dev); 964 netif_rx(skb); 965 db->stats.rx_packets++; 966 967 } else { 968 /* need to dump the packet's data */ 969 970 (db->dumpblk)(db->io_data, RxLen); 971 } 972 } while (rxbyte == DM9000_PKT_RDY); 973} 974 975/* 976 * Read a word data from SROM 977 */ 978static u16 979read_srom_word(board_info_t * db, int offset) 980{ 981 iow(db, DM9000_EPAR, offset); 982 iow(db, DM9000_EPCR, EPCR_ERPRR); 983 mdelay(8); /* according to the datasheet 200us should be enough, 984 but it doesn't work */ 985 iow(db, DM9000_EPCR, 0x0); 986 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8)); 987} 988 989#ifdef DM9000_PROGRAM_EEPROM 990/* 991 * Write a word data to SROM 992 */ 993static void 994write_srom_word(board_info_t * db, int offset, u16 val) 995{ 996 iow(db, DM9000_EPAR, offset); 997 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff)); 998 iow(db, DM9000_EPDRL, (val & 0xff)); 999 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW); 1000 mdelay(8); /* same shit */ 1001 iow(db, DM9000_EPCR, 0); 1002} 1003 1004/* 1005 * Only for development: 1006 * Here we write static data to the eeprom in case 1007 * we don't have valid content on a new board 1008 */ 1009static void 1010program_eeprom(board_info_t * db) 1011{ 1012 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */ 1013 0x0000, /* Autoload: accept nothing */ 1014 0x0a46, 0x9000, /* Vendor / Product ID */ 1015 0x0000, /* pin control */ 1016 0x0000, 1017 }; /* Wake-up mode control */ 1018 int i; 1019 for (i = 0; i < 8; i++) 1020 write_srom_word(db, i, eeprom[i]); 1021} 1022#endif 1023 1024 1025/* 1026 * Calculate the CRC valude of the Rx packet 1027 * flag = 1 : return the reverse CRC (for the received packet CRC) 1028 * 0 : return the normal CRC (for Hash Table index) 1029 */ 1030 1031static unsigned long 1032cal_CRC(unsigned char *Data, unsigned int Len, u8 flag) 1033{ 1034 1035 u32 crc = ether_crc_le(Len, Data); 1036 1037 if (flag) 1038 return ~crc; 1039 1040 return crc; 1041} 1042 1043/* 1044 * Set DM9000 multicast address 1045 */ 1046static void 1047dm9000_hash_table(struct net_device *dev) 1048{ 1049 board_info_t *db = (board_info_t *) dev->priv; 1050 struct dev_mc_list *mcptr = dev->mc_list; 1051 int mc_cnt = dev->mc_count; 1052 u32 hash_val; 1053 u16 i, oft, hash_table[4]; 1054 unsigned long flags; 1055 1056 PRINTK2("dm9000_hash_table()\n"); 1057 1058 spin_lock_irqsave(&db->lock,flags); 1059 1060 for (i = 0, oft = 0x10; i < 6; i++, oft++) 1061 iow(db, oft, dev->dev_addr[i]); 1062 1063 /* Clear Hash Table */ 1064 for (i = 0; i < 4; i++) 1065 hash_table[i] = 0x0; 1066 1067 /* broadcast address */ 1068 hash_table[3] = 0x8000; 1069 1070 /* the multicast address in Hash Table : 64 bits */ 1071 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) { 1072 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f; 1073 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16); 1074 } 1075 1076 /* Write the hash table to MAC MD table */ 1077 for (i = 0, oft = 0x16; i < 4; i++) { 1078 iow(db, oft++, hash_table[i] & 0xff); 1079 iow(db, oft++, (hash_table[i] >> 8) & 0xff); 1080 } 1081 1082 spin_unlock_irqrestore(&db->lock,flags); 1083} 1084 1085 1086/* 1087 * Read a word from phyxcer 1088 */ 1089static int 1090dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg) 1091{ 1092 board_info_t *db = (board_info_t *) dev->priv; 1093 unsigned long flags; 1094 unsigned int reg_save; 1095 int ret; 1096 1097 spin_lock_irqsave(&db->lock,flags); 1098 1099 /* Save previous register address */ 1100 reg_save = readb(db->io_addr); 1101 1102 /* Fill the phyxcer register into REG_0C */ 1103 iow(db, DM9000_EPAR, DM9000_PHY | reg); 1104 1105 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */ 1106 udelay(100); /* Wait read complete */ 1107 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */ 1108 1109 /* The read data keeps on REG_0D & REG_0E */ 1110 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL); 1111 1112 /* restore the previous address */ 1113 writeb(reg_save, db->io_addr); 1114 1115 spin_unlock_irqrestore(&db->lock,flags); 1116 1117 return ret; 1118} 1119 1120/* 1121 * Write a word to phyxcer 1122 */ 1123static void 1124dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value) 1125{ 1126 board_info_t *db = (board_info_t *) dev->priv; 1127 unsigned long flags; 1128 unsigned long reg_save; 1129 1130 spin_lock_irqsave(&db->lock,flags); 1131 1132 /* Save previous register address */ 1133 reg_save = readb(db->io_addr); 1134 1135 /* Fill the phyxcer register into REG_0C */ 1136 iow(db, DM9000_EPAR, DM9000_PHY | reg); 1137 1138 /* Fill the written data into REG_0D & REG_0E */ 1139 iow(db, DM9000_EPDRL, (value & 0xff)); 1140 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff)); 1141 1142 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */ 1143 udelay(500); /* Wait write complete */ 1144 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */ 1145 1146 /* restore the previous address */ 1147 writeb(reg_save, db->io_addr); 1148 1149 spin_unlock_irqrestore(&db->lock,flags); 1150} 1151 1152static int 1153dm9000_drv_suspend(struct platform_device *dev, pm_message_t state) 1154{ 1155 struct net_device *ndev = platform_get_drvdata(dev); 1156 1157 if (ndev) { 1158 if (netif_running(ndev)) { 1159 netif_device_detach(ndev); 1160 dm9000_shutdown(ndev); 1161 } 1162 } 1163 return 0; 1164} 1165 1166static int 1167dm9000_drv_resume(struct platform_device *dev) 1168{ 1169 struct net_device *ndev = platform_get_drvdata(dev); 1170 board_info_t *db = (board_info_t *) ndev->priv; 1171 1172 if (ndev) { 1173 1174 if (netif_running(ndev)) { 1175 dm9000_reset(db); 1176 dm9000_init_dm9000(ndev); 1177 1178 netif_device_attach(ndev); 1179 } 1180 } 1181 return 0; 1182} 1183 1184static int 1185dm9000_drv_remove(struct platform_device *pdev) 1186{ 1187 struct net_device *ndev = platform_get_drvdata(pdev); 1188 1189 platform_set_drvdata(pdev, NULL); 1190 1191 unregister_netdev(ndev); 1192 dm9000_release_board(pdev, (board_info_t *) ndev->priv); 1193 free_netdev(ndev); /* free device structure */ 1194 1195 PRINTK1("clean_module() exit\n"); 1196 1197 return 0; 1198} 1199 1200static struct platform_driver dm9000_driver = { 1201 .driver = { 1202 .name = "dm9000", 1203 .owner = THIS_MODULE, 1204 }, 1205 .probe = dm9000_probe, 1206 .remove = dm9000_drv_remove, 1207 .suspend = dm9000_drv_suspend, 1208 .resume = dm9000_drv_resume, 1209}; 1210 1211static int __init 1212dm9000_init(void) 1213{ 1214 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME); 1215 1216 return platform_driver_register(&dm9000_driver); /* search board and register */ 1217} 1218 1219static void __exit 1220dm9000_cleanup(void) 1221{ 1222 platform_driver_unregister(&dm9000_driver); 1223} 1224 1225module_init(dm9000_init); 1226module_exit(dm9000_cleanup); 1227 1228MODULE_AUTHOR("Sascha Hauer, Ben Dooks"); 1229MODULE_DESCRIPTION("Davicom DM9000 network driver"); 1230MODULE_LICENSE("GPL"); 1231