1 /*====================================================================== 2 3 A PCMCIA ethernet driver for Asix AX88190-based cards 4 5 The Asix AX88190 is a NS8390-derived chipset with a few nasty 6 idiosyncracies that make it very inconvenient to support with a 7 standard 8390 driver. This driver is based on pcnet_cs, with the 8 tweaked 8390 code grafted on the end. Much of what I did was to 9 clean up and update a similar driver supplied by Asix, which was 10 adapted by William Lee, william@asix.com.tw. 11 12 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net 13 14 axnet_cs.c 1.28 2002/06/29 06:27:37 15 16 The network driver code is based on Donald Becker's NE2000 code: 17 18 Written 1992,1993 by Donald Becker. 19 Copyright 1993 United States Government as represented by the 20 Director, National Security Agency. This software may be used and 21 distributed according to the terms of the GNU General Public License, 22 incorporated herein by reference. 23 Donald Becker may be reached at becker@scyld.com 24 25 ======================================================================*/ 26 27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/ptrace.h> 33 #include <linux/string.h> 34 #include <linux/timer.h> 35 #include <linux/delay.h> 36 #include <linux/spinlock.h> 37 #include <linux/netdevice.h> 38 #include <linux/etherdevice.h> 39 #include <linux/crc32.h> 40 #include <linux/mii.h> 41 #include "8390.h" 42 43 #include <pcmcia/cistpl.h> 44 #include <pcmcia/ciscode.h> 45 #include <pcmcia/ds.h> 46 #include <pcmcia/cisreg.h> 47 48 #include <asm/io.h> 49 #include <asm/byteorder.h> 50 #include <asm/uaccess.h> 51 52 #define AXNET_CMD 0x00 53 #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */ 54 #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */ 55 #define AXNET_MII_EEP 0x14 /* Offset of MII access port */ 56 #define AXNET_TEST 0x15 /* Offset of TEST Register port */ 57 #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */ 58 59 #define AXNET_START_PG 0x40 /* First page of TX buffer */ 60 #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */ 61 62 #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */ 63 64 #define IS_AX88190 0x0001 65 #define IS_AX88790 0x0002 66 67 /*====================================================================*/ 68 69 /* Module parameters */ 70 71 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 72 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver"); 73 MODULE_LICENSE("GPL"); 74 75 76 /*====================================================================*/ 77 78 static int axnet_config(struct pcmcia_device *link); 79 static void axnet_release(struct pcmcia_device *link); 80 static int axnet_open(struct net_device *dev); 81 static int axnet_close(struct net_device *dev); 82 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 83 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, 84 struct net_device *dev); 85 static struct net_device_stats *get_stats(struct net_device *dev); 86 static void set_multicast_list(struct net_device *dev); 87 static void axnet_tx_timeout(struct net_device *dev); 88 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id); 89 static void ei_watchdog(u_long arg); 90 static void axnet_reset_8390(struct net_device *dev); 91 92 static int mdio_read(unsigned int addr, int phy_id, int loc); 93 static void mdio_write(unsigned int addr, int phy_id, int loc, int value); 94 95 static void get_8390_hdr(struct net_device *, 96 struct e8390_pkt_hdr *, int); 97 static void block_input(struct net_device *dev, int count, 98 struct sk_buff *skb, int ring_offset); 99 static void block_output(struct net_device *dev, int count, 100 const u_char *buf, const int start_page); 101 102 static void axnet_detach(struct pcmcia_device *p_dev); 103 104 static void AX88190_init(struct net_device *dev, int startp); 105 static int ax_open(struct net_device *dev); 106 static int ax_close(struct net_device *dev); 107 static irqreturn_t ax_interrupt(int irq, void *dev_id); 108 109 /*====================================================================*/ 110 111 typedef struct axnet_dev_t { 112 struct pcmcia_device *p_dev; 113 caddr_t base; 114 struct timer_list watchdog; 115 int stale, fast_poll; 116 u_short link_status; 117 u_char duplex_flag; 118 int phy_id; 119 int flags; 120 int active_low; 121 } axnet_dev_t; 122 123 static inline axnet_dev_t *PRIV(struct net_device *dev) 124 { 125 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device); 126 return p; 127 } 128 129 static const struct net_device_ops axnet_netdev_ops = { 130 .ndo_open = axnet_open, 131 .ndo_stop = axnet_close, 132 .ndo_do_ioctl = axnet_ioctl, 133 .ndo_start_xmit = axnet_start_xmit, 134 .ndo_tx_timeout = axnet_tx_timeout, 135 .ndo_get_stats = get_stats, 136 .ndo_set_rx_mode = set_multicast_list, 137 .ndo_change_mtu = eth_change_mtu, 138 .ndo_set_mac_address = eth_mac_addr, 139 .ndo_validate_addr = eth_validate_addr, 140 }; 141 142 static int axnet_probe(struct pcmcia_device *link) 143 { 144 axnet_dev_t *info; 145 struct net_device *dev; 146 struct ei_device *ei_local; 147 148 dev_dbg(&link->dev, "axnet_attach()\n"); 149 150 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t)); 151 if (!dev) 152 return -ENOMEM; 153 154 ei_local = netdev_priv(dev); 155 spin_lock_init(&ei_local->page_lock); 156 157 info = PRIV(dev); 158 info->p_dev = link; 159 link->priv = dev; 160 link->config_flags |= CONF_ENABLE_IRQ; 161 162 dev->netdev_ops = &axnet_netdev_ops; 163 164 dev->watchdog_timeo = TX_TIMEOUT; 165 166 return axnet_config(link); 167 } /* axnet_attach */ 168 169 static void axnet_detach(struct pcmcia_device *link) 170 { 171 struct net_device *dev = link->priv; 172 173 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link); 174 175 unregister_netdev(dev); 176 177 axnet_release(link); 178 179 free_netdev(dev); 180 } /* axnet_detach */ 181 182 /*====================================================================== 183 184 This probes for a card's hardware address by reading the PROM. 185 186 ======================================================================*/ 187 188 static int get_prom(struct pcmcia_device *link) 189 { 190 struct net_device *dev = link->priv; 191 unsigned int ioaddr = dev->base_addr; 192 int i, j; 193 194 /* This is based on drivers/net/ethernet/8390/ne.c */ 195 struct { 196 u_char value, offset; 197 } program_seq[] = { 198 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ 199 {0x01, EN0_DCFG}, /* Set word-wide access. */ 200 {0x00, EN0_RCNTLO}, /* Clear the count regs. */ 201 {0x00, EN0_RCNTHI}, 202 {0x00, EN0_IMR}, /* Mask completion irq. */ 203 {0xFF, EN0_ISR}, 204 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */ 205 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ 206 {0x10, EN0_RCNTLO}, 207 {0x00, EN0_RCNTHI}, 208 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */ 209 {0x04, EN0_RSARHI}, 210 {E8390_RREAD+E8390_START, E8390_CMD}, 211 }; 212 213 /* Not much of a test, but the alternatives are messy */ 214 if (link->config_base != 0x03c0) 215 return 0; 216 217 axnet_reset_8390(dev); 218 mdelay(10); 219 220 for (i = 0; i < ARRAY_SIZE(program_seq); i++) 221 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); 222 223 for (i = 0; i < 6; i += 2) { 224 j = inw(ioaddr + AXNET_DATAPORT); 225 dev->dev_addr[i] = j & 0xff; 226 dev->dev_addr[i+1] = j >> 8; 227 } 228 return 1; 229 } /* get_prom */ 230 231 static int try_io_port(struct pcmcia_device *link) 232 { 233 int j, ret; 234 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 235 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH; 236 if (link->resource[0]->end == 32) { 237 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; 238 /* for master/slave multifunction cards */ 239 if (link->resource[1]->end > 0) 240 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8; 241 } else { 242 /* This should be two 16-port windows */ 243 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 244 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16; 245 } 246 if (link->resource[0]->start == 0) { 247 for (j = 0; j < 0x400; j += 0x20) { 248 link->resource[0]->start = j ^ 0x300; 249 link->resource[1]->start = (j ^ 0x300) + 0x10; 250 link->io_lines = 16; 251 ret = pcmcia_request_io(link); 252 if (ret == 0) 253 return ret; 254 } 255 return ret; 256 } else { 257 return pcmcia_request_io(link); 258 } 259 } 260 261 static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data) 262 { 263 if (p_dev->config_index == 0) 264 return -EINVAL; 265 266 p_dev->config_index = 0x05; 267 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32) 268 return -ENODEV; 269 270 return try_io_port(p_dev); 271 } 272 273 static int axnet_config(struct pcmcia_device *link) 274 { 275 struct net_device *dev = link->priv; 276 axnet_dev_t *info = PRIV(dev); 277 int i, j, j2, ret; 278 279 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link); 280 281 /* don't trust the CIS on this; Linksys got it wrong */ 282 link->config_regs = 0x63; 283 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; 284 ret = pcmcia_loop_config(link, axnet_configcheck, NULL); 285 if (ret != 0) 286 goto failed; 287 288 if (!link->irq) 289 goto failed; 290 291 if (resource_size(link->resource[1]) == 8) 292 link->config_flags |= CONF_ENABLE_SPKR; 293 294 ret = pcmcia_enable_device(link); 295 if (ret) 296 goto failed; 297 298 dev->irq = link->irq; 299 dev->base_addr = link->resource[0]->start; 300 301 if (!get_prom(link)) { 302 pr_notice("this is not an AX88190 card!\n"); 303 pr_notice("use pcnet_cs instead.\n"); 304 goto failed; 305 } 306 307 ei_status.name = "AX88190"; 308 ei_status.word16 = 1; 309 ei_status.tx_start_page = AXNET_START_PG; 310 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES; 311 ei_status.stop_page = AXNET_STOP_PG; 312 ei_status.reset_8390 = axnet_reset_8390; 313 ei_status.get_8390_hdr = get_8390_hdr; 314 ei_status.block_input = block_input; 315 ei_status.block_output = block_output; 316 317 if (inb(dev->base_addr + AXNET_TEST) != 0) 318 info->flags |= IS_AX88790; 319 else 320 info->flags |= IS_AX88190; 321 322 if (info->flags & IS_AX88790) 323 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */ 324 325 info->active_low = 0; 326 327 for (i = 0; i < 32; i++) { 328 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); 329 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); 330 if (j == j2) continue; 331 if ((j != 0) && (j != 0xffff)) break; 332 } 333 334 if (i == 32) { 335 /* Maybe PHY is in power down mode. (PPD_SET = 1) 336 Bit 2 of CCSR is active low. */ 337 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); 338 for (i = 0; i < 32; i++) { 339 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); 340 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); 341 if (j == j2) continue; 342 if ((j != 0) && (j != 0xffff)) { 343 info->active_low = 1; 344 break; 345 } 346 } 347 } 348 349 info->phy_id = (i < 32) ? i : -1; 350 SET_NETDEV_DEV(dev, &link->dev); 351 352 if (register_netdev(dev) != 0) { 353 pr_notice("register_netdev() failed\n"); 354 goto failed; 355 } 356 357 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n", 358 ((info->flags & IS_AX88790) ? 7 : 1), 359 dev->base_addr, dev->irq, dev->dev_addr); 360 if (info->phy_id != -1) { 361 netdev_dbg(dev, " MII transceiver at index %d, status %x\n", 362 info->phy_id, j); 363 } else { 364 netdev_notice(dev, " No MII transceivers found!\n"); 365 } 366 return 0; 367 368 failed: 369 axnet_release(link); 370 return -ENODEV; 371 } /* axnet_config */ 372 373 static void axnet_release(struct pcmcia_device *link) 374 { 375 pcmcia_disable_device(link); 376 } 377 378 static int axnet_suspend(struct pcmcia_device *link) 379 { 380 struct net_device *dev = link->priv; 381 382 if (link->open) 383 netif_device_detach(dev); 384 385 return 0; 386 } 387 388 static int axnet_resume(struct pcmcia_device *link) 389 { 390 struct net_device *dev = link->priv; 391 axnet_dev_t *info = PRIV(dev); 392 393 if (link->open) { 394 if (info->active_low == 1) 395 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); 396 397 axnet_reset_8390(dev); 398 AX88190_init(dev, 1); 399 netif_device_attach(dev); 400 } 401 402 return 0; 403 } 404 405 406 /*====================================================================== 407 408 MII interface support 409 410 ======================================================================*/ 411 412 #define MDIO_SHIFT_CLK 0x01 413 #define MDIO_DATA_WRITE0 0x00 414 #define MDIO_DATA_WRITE1 0x08 415 #define MDIO_DATA_READ 0x04 416 #define MDIO_MASK 0x0f 417 #define MDIO_ENB_IN 0x02 418 419 static void mdio_sync(unsigned int addr) 420 { 421 int bits; 422 for (bits = 0; bits < 32; bits++) { 423 outb_p(MDIO_DATA_WRITE1, addr); 424 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr); 425 } 426 } 427 428 static int mdio_read(unsigned int addr, int phy_id, int loc) 429 { 430 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc; 431 int i, retval = 0; 432 433 mdio_sync(addr); 434 for (i = 14; i >= 0; i--) { 435 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 436 outb_p(dat, addr); 437 outb_p(dat | MDIO_SHIFT_CLK, addr); 438 } 439 for (i = 19; i > 0; i--) { 440 outb_p(MDIO_ENB_IN, addr); 441 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0); 442 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); 443 } 444 return (retval>>1) & 0xffff; 445 } 446 447 static void mdio_write(unsigned int addr, int phy_id, int loc, int value) 448 { 449 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value; 450 int i; 451 452 mdio_sync(addr); 453 for (i = 31; i >= 0; i--) { 454 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 455 outb_p(dat, addr); 456 outb_p(dat | MDIO_SHIFT_CLK, addr); 457 } 458 for (i = 1; i >= 0; i--) { 459 outb_p(MDIO_ENB_IN, addr); 460 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); 461 } 462 } 463 464 /*====================================================================*/ 465 466 static int axnet_open(struct net_device *dev) 467 { 468 int ret; 469 axnet_dev_t *info = PRIV(dev); 470 struct pcmcia_device *link = info->p_dev; 471 unsigned int nic_base = dev->base_addr; 472 473 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name); 474 475 if (!pcmcia_dev_present(link)) 476 return -ENODEV; 477 478 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */ 479 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev); 480 if (ret) 481 return ret; 482 483 link->open++; 484 485 info->link_status = 0x00; 486 init_timer(&info->watchdog); 487 info->watchdog.function = ei_watchdog; 488 info->watchdog.data = (u_long)dev; 489 info->watchdog.expires = jiffies + HZ; 490 add_timer(&info->watchdog); 491 492 return ax_open(dev); 493 } /* axnet_open */ 494 495 /*====================================================================*/ 496 497 static int axnet_close(struct net_device *dev) 498 { 499 axnet_dev_t *info = PRIV(dev); 500 struct pcmcia_device *link = info->p_dev; 501 502 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name); 503 504 ax_close(dev); 505 free_irq(dev->irq, dev); 506 507 link->open--; 508 netif_stop_queue(dev); 509 del_timer_sync(&info->watchdog); 510 511 return 0; 512 } /* axnet_close */ 513 514 /*====================================================================== 515 516 Hard reset the card. This used to pause for the same period that 517 a 8390 reset command required, but that shouldn't be necessary. 518 519 ======================================================================*/ 520 521 static void axnet_reset_8390(struct net_device *dev) 522 { 523 unsigned int nic_base = dev->base_addr; 524 int i; 525 526 ei_status.txing = ei_status.dmaing = 0; 527 528 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD); 529 530 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET); 531 532 for (i = 0; i < 100; i++) { 533 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0) 534 break; 535 udelay(100); 536 } 537 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */ 538 539 if (i == 100) 540 netdev_err(dev, "axnet_reset_8390() did not complete\n"); 541 542 } /* axnet_reset_8390 */ 543 544 /*====================================================================*/ 545 546 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id) 547 { 548 struct net_device *dev = dev_id; 549 PRIV(dev)->stale = 0; 550 return ax_interrupt(irq, dev_id); 551 } 552 553 static void ei_watchdog(u_long arg) 554 { 555 struct net_device *dev = (struct net_device *)(arg); 556 axnet_dev_t *info = PRIV(dev); 557 unsigned int nic_base = dev->base_addr; 558 unsigned int mii_addr = nic_base + AXNET_MII_EEP; 559 u_short link; 560 561 if (!netif_device_present(dev)) goto reschedule; 562 563 /* Check for pending interrupt with expired latency timer: with 564 this, we can limp along even if the interrupt is blocked */ 565 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) { 566 if (!info->fast_poll) 567 netdev_info(dev, "interrupt(s) dropped!\n"); 568 ei_irq_wrapper(dev->irq, dev); 569 info->fast_poll = HZ; 570 } 571 if (info->fast_poll) { 572 info->fast_poll--; 573 info->watchdog.expires = jiffies + 1; 574 add_timer(&info->watchdog); 575 return; 576 } 577 578 if (info->phy_id < 0) 579 goto reschedule; 580 link = mdio_read(mii_addr, info->phy_id, 1); 581 if (!link || (link == 0xffff)) { 582 netdev_info(dev, "MII is missing!\n"); 583 info->phy_id = -1; 584 goto reschedule; 585 } 586 587 link &= 0x0004; 588 if (link != info->link_status) { 589 u_short p = mdio_read(mii_addr, info->phy_id, 5); 590 netdev_info(dev, "%s link beat\n", link ? "found" : "lost"); 591 if (link) { 592 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00; 593 if (p) 594 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n", 595 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H'); 596 else 597 netdev_info(dev, "link partner did not autonegotiate\n"); 598 AX88190_init(dev, 1); 599 } 600 info->link_status = link; 601 } 602 603 reschedule: 604 info->watchdog.expires = jiffies + HZ; 605 add_timer(&info->watchdog); 606 } 607 608 /*====================================================================*/ 609 610 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 611 { 612 axnet_dev_t *info = PRIV(dev); 613 struct mii_ioctl_data *data = if_mii(rq); 614 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP; 615 switch (cmd) { 616 case SIOCGMIIPHY: 617 data->phy_id = info->phy_id; 618 case SIOCGMIIREG: /* Read MII PHY register. */ 619 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f); 620 return 0; 621 case SIOCSMIIREG: /* Write MII PHY register. */ 622 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in); 623 return 0; 624 } 625 return -EOPNOTSUPP; 626 } 627 628 /*====================================================================*/ 629 630 static void get_8390_hdr(struct net_device *dev, 631 struct e8390_pkt_hdr *hdr, 632 int ring_page) 633 { 634 unsigned int nic_base = dev->base_addr; 635 636 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ 637 outb_p(ring_page, nic_base + EN0_RSARHI); 638 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); 639 640 insw(nic_base + AXNET_DATAPORT, hdr, 641 sizeof(struct e8390_pkt_hdr)>>1); 642 /* Fix for big endian systems */ 643 hdr->count = le16_to_cpu(hdr->count); 644 645 } 646 647 /*====================================================================*/ 648 649 static void block_input(struct net_device *dev, int count, 650 struct sk_buff *skb, int ring_offset) 651 { 652 unsigned int nic_base = dev->base_addr; 653 int xfer_count = count; 654 char *buf = skb->data; 655 656 if ((ei_debug > 4) && (count != 4)) 657 pr_debug("%s: [bi=%d]\n", dev->name, count+4); 658 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); 659 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); 660 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); 661 662 insw(nic_base + AXNET_DATAPORT,buf,count>>1); 663 if (count & 0x01) 664 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++; 665 666 } 667 668 /*====================================================================*/ 669 670 static void block_output(struct net_device *dev, int count, 671 const u_char *buf, const int start_page) 672 { 673 unsigned int nic_base = dev->base_addr; 674 675 pr_debug("%s: [bo=%d]\n", dev->name, count); 676 677 /* Round the count up for word writes. Do we need to do this? 678 What effect will an odd byte count have on the 8390? 679 I should check someday. */ 680 if (count & 0x01) 681 count++; 682 683 outb_p(0x00, nic_base + EN0_RSARLO); 684 outb_p(start_page, nic_base + EN0_RSARHI); 685 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD); 686 outsw(nic_base + AXNET_DATAPORT, buf, count>>1); 687 } 688 689 static const struct pcmcia_device_id axnet_ids[] = { 690 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081), 691 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301), 692 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328), 693 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301), 694 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303), 695 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309), 696 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106), 697 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab), 698 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), 699 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090), 700 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc), 701 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef), 702 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef), 703 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1), 704 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc), 705 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b), 706 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5), 707 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e), 708 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061), 709 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90), 710 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2), 711 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8), 712 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609), 713 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875), 714 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04), 715 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116), 716 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058), 717 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef), 718 PCMCIA_DEVICE_NULL, 719 }; 720 MODULE_DEVICE_TABLE(pcmcia, axnet_ids); 721 722 static struct pcmcia_driver axnet_cs_driver = { 723 .owner = THIS_MODULE, 724 .name = "axnet_cs", 725 .probe = axnet_probe, 726 .remove = axnet_detach, 727 .id_table = axnet_ids, 728 .suspend = axnet_suspend, 729 .resume = axnet_resume, 730 }; 731 732 static int __init init_axnet_cs(void) 733 { 734 return pcmcia_register_driver(&axnet_cs_driver); 735 } 736 737 static void __exit exit_axnet_cs(void) 738 { 739 pcmcia_unregister_driver(&axnet_cs_driver); 740 } 741 742 module_init(init_axnet_cs); 743 module_exit(exit_axnet_cs); 744 745 /*====================================================================*/ 746 747 /* 8390.c: A general NS8390 ethernet driver core for linux. */ 748 /* 749 Written 1992-94 by Donald Becker. 750 751 Copyright 1993 United States Government as represented by the 752 Director, National Security Agency. 753 754 This software may be used and distributed according to the terms 755 of the GNU General Public License, incorporated herein by reference. 756 757 The author may be reached as becker@scyld.com, or C/O 758 Scyld Computing Corporation 759 410 Severn Ave., Suite 210 760 Annapolis MD 21403 761 762 This is the chip-specific code for many 8390-based ethernet adaptors. 763 This is not a complete driver, it must be combined with board-specific 764 code such as ne.c, wd.c, 3c503.c, etc. 765 766 Seeing how at least eight drivers use this code, (not counting the 767 PCMCIA ones either) it is easy to break some card by what seems like 768 a simple innocent change. Please contact me or Donald if you think 769 you have found something that needs changing. -- PG 770 771 Changelog: 772 773 Paul Gortmaker : remove set_bit lock, other cleanups. 774 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to 775 ei_block_input() for eth_io_copy_and_sum(). 776 Paul Gortmaker : exchange static int ei_pingpong for a #define, 777 also add better Tx error handling. 778 Paul Gortmaker : rewrite Rx overrun handling as per NS specs. 779 Alexey Kuznetsov : use the 8390's six bit hash multicast filter. 780 Paul Gortmaker : tweak ANK's above multicast changes a bit. 781 Paul Gortmaker : update packet statistics for v2.1.x 782 Alan Cox : support arbitrary stupid port mappings on the 783 68K Macintosh. Support >16bit I/O spaces 784 Paul Gortmaker : add kmod support for auto-loading of the 8390 785 module by all drivers that require it. 786 Alan Cox : Spinlocking work, added 'BUG_83C690' 787 Paul Gortmaker : Separate out Tx timeout code from Tx path. 788 789 Sources: 790 The National Semiconductor LAN Databook, and the 3Com 3c503 databook. 791 792 */ 793 794 #include <linux/bitops.h> 795 #include <asm/irq.h> 796 #include <linux/fcntl.h> 797 #include <linux/in.h> 798 #include <linux/interrupt.h> 799 800 #define BUG_83C690 801 802 /* These are the operational function interfaces to board-specific 803 routines. 804 void reset_8390(struct net_device *dev) 805 Resets the board associated with DEV, including a hardware reset of 806 the 8390. This is only called when there is a transmit timeout, and 807 it is always followed by 8390_init(). 808 void block_output(struct net_device *dev, int count, const unsigned char *buf, 809 int start_page) 810 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The 811 "page" value uses the 8390's 256-byte pages. 812 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) 813 Read the 4 byte, page aligned 8390 header. *If* there is a 814 subsequent read, it will be of the rest of the packet. 815 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) 816 Read COUNT bytes from the packet buffer into the skb data area. Start 817 reading from RING_OFFSET, the address as the 8390 sees it. This will always 818 follow the read of the 8390 header. 819 */ 820 #define ei_reset_8390 (ei_local->reset_8390) 821 #define ei_block_output (ei_local->block_output) 822 #define ei_block_input (ei_local->block_input) 823 #define ei_get_8390_hdr (ei_local->get_8390_hdr) 824 825 /* use 0 for production, 1 for verification, >2 for debug */ 826 #ifndef ei_debug 827 int ei_debug = 1; 828 #endif 829 830 /* Index to functions. */ 831 static void ei_tx_intr(struct net_device *dev); 832 static void ei_tx_err(struct net_device *dev); 833 static void ei_receive(struct net_device *dev); 834 static void ei_rx_overrun(struct net_device *dev); 835 836 /* Routines generic to NS8390-based boards. */ 837 static void NS8390_trigger_send(struct net_device *dev, unsigned int length, 838 int start_page); 839 static void do_set_multicast_list(struct net_device *dev); 840 841 /* 842 * SMP and the 8390 setup. 843 * 844 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is 845 * a page register that controls bank and packet buffer access. We guard 846 * this with ei_local->page_lock. Nobody should assume or set the page other 847 * than zero when the lock is not held. Lock holders must restore page 0 848 * before unlocking. Even pure readers must take the lock to protect in 849 * page 0. 850 * 851 * To make life difficult the chip can also be very slow. We therefore can't 852 * just use spinlocks. For the longer lockups we disable the irq the device 853 * sits on and hold the lock. We must hold the lock because there is a dual 854 * processor case other than interrupts (get stats/set multicast list in 855 * parallel with each other and transmit). 856 * 857 * Note: in theory we can just disable the irq on the card _but_ there is 858 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" 859 * enter lock, take the queued irq. So we waddle instead of flying. 860 * 861 * Finally by special arrangement for the purpose of being generally 862 * annoying the transmit function is called bh atomic. That places 863 * restrictions on the user context callers as disable_irq won't save 864 * them. 865 */ 866 867 /** 868 * ax_open - Open/initialize the board. 869 * @dev: network device to initialize 870 * 871 * This routine goes all-out, setting everything 872 * up anew at each open, even though many of these registers should only 873 * need to be set once at boot. 874 */ 875 static int ax_open(struct net_device *dev) 876 { 877 unsigned long flags; 878 struct ei_device *ei_local = netdev_priv(dev); 879 880 /* 881 * Grab the page lock so we own the register set, then call 882 * the init function. 883 */ 884 885 spin_lock_irqsave(&ei_local->page_lock, flags); 886 AX88190_init(dev, 1); 887 /* Set the flag before we drop the lock, That way the IRQ arrives 888 after its set and we get no silly warnings */ 889 netif_start_queue(dev); 890 spin_unlock_irqrestore(&ei_local->page_lock, flags); 891 ei_local->irqlock = 0; 892 return 0; 893 } 894 895 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) 896 897 /** 898 * ax_close - shut down network device 899 * @dev: network device to close 900 * 901 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. 902 */ 903 static int ax_close(struct net_device *dev) 904 { 905 unsigned long flags; 906 907 /* 908 * Hold the page lock during close 909 */ 910 911 spin_lock_irqsave(&dev_lock(dev), flags); 912 AX88190_init(dev, 0); 913 spin_unlock_irqrestore(&dev_lock(dev), flags); 914 netif_stop_queue(dev); 915 return 0; 916 } 917 918 /** 919 * axnet_tx_timeout - handle transmit time out condition 920 * @dev: network device which has apparently fallen asleep 921 * 922 * Called by kernel when device never acknowledges a transmit has 923 * completed (or failed) - i.e. never posted a Tx related interrupt. 924 */ 925 926 static void axnet_tx_timeout(struct net_device *dev) 927 { 928 long e8390_base = dev->base_addr; 929 struct ei_device *ei_local = netdev_priv(dev); 930 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev); 931 unsigned long flags; 932 933 dev->stats.tx_errors++; 934 935 spin_lock_irqsave(&ei_local->page_lock, flags); 936 txsr = inb(e8390_base+EN0_TSR); 937 isr = inb(e8390_base+EN0_ISR); 938 spin_unlock_irqrestore(&ei_local->page_lock, flags); 939 940 netdev_printk(KERN_DEBUG, dev, 941 "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", 942 (txsr & ENTSR_ABT) ? "excess collisions." : 943 (isr) ? "lost interrupt?" : "cable problem?", 944 txsr, isr, tickssofar); 945 946 if (!isr && !dev->stats.tx_packets) 947 { 948 /* The 8390 probably hasn't gotten on the cable yet. */ 949 ei_local->interface_num ^= 1; /* Try a different xcvr. */ 950 } 951 952 /* Ugly but a reset can be slow, yet must be protected */ 953 954 spin_lock_irqsave(&ei_local->page_lock, flags); 955 956 /* Try to restart the card. Perhaps the user has fixed something. */ 957 ei_reset_8390(dev); 958 AX88190_init(dev, 1); 959 960 spin_unlock_irqrestore(&ei_local->page_lock, flags); 961 netif_wake_queue(dev); 962 } 963 964 /** 965 * axnet_start_xmit - begin packet transmission 966 * @skb: packet to be sent 967 * @dev: network device to which packet is sent 968 * 969 * Sends a packet to an 8390 network device. 970 */ 971 972 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, 973 struct net_device *dev) 974 { 975 long e8390_base = dev->base_addr; 976 struct ei_device *ei_local = netdev_priv(dev); 977 int length, send_length, output_page; 978 unsigned long flags; 979 u8 packet[ETH_ZLEN]; 980 981 netif_stop_queue(dev); 982 983 length = skb->len; 984 985 /* Mask interrupts from the ethercard. 986 SMP: We have to grab the lock here otherwise the IRQ handler 987 on another CPU can flip window and race the IRQ mask set. We end 988 up trashing the mcast filter not disabling irqs if we don't lock */ 989 990 spin_lock_irqsave(&ei_local->page_lock, flags); 991 outb_p(0x00, e8390_base + EN0_IMR); 992 993 /* 994 * Slow phase with lock held. 995 */ 996 997 ei_local->irqlock = 1; 998 999 send_length = max(length, ETH_ZLEN); 1000 1001 /* 1002 * We have two Tx slots available for use. Find the first free 1003 * slot, and then perform some sanity checks. With two Tx bufs, 1004 * you get very close to transmitting back-to-back packets. With 1005 * only one Tx buf, the transmitter sits idle while you reload the 1006 * card, leaving a substantial gap between each transmitted packet. 1007 */ 1008 1009 if (ei_local->tx1 == 0) 1010 { 1011 output_page = ei_local->tx_start_page; 1012 ei_local->tx1 = send_length; 1013 if (ei_debug && ei_local->tx2 > 0) 1014 netdev_printk(KERN_DEBUG, dev, 1015 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n", 1016 ei_local->tx2, ei_local->lasttx, 1017 ei_local->txing); 1018 } 1019 else if (ei_local->tx2 == 0) 1020 { 1021 output_page = ei_local->tx_start_page + TX_PAGES/2; 1022 ei_local->tx2 = send_length; 1023 if (ei_debug && ei_local->tx1 > 0) 1024 netdev_printk(KERN_DEBUG, dev, 1025 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n", 1026 ei_local->tx1, ei_local->lasttx, 1027 ei_local->txing); 1028 } 1029 else 1030 { /* We should never get here. */ 1031 if (ei_debug) 1032 netdev_printk(KERN_DEBUG, dev, 1033 "No Tx buffers free! tx1=%d tx2=%d last=%d\n", 1034 ei_local->tx1, ei_local->tx2, 1035 ei_local->lasttx); 1036 ei_local->irqlock = 0; 1037 netif_stop_queue(dev); 1038 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1039 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1040 dev->stats.tx_errors++; 1041 return NETDEV_TX_BUSY; 1042 } 1043 1044 /* 1045 * Okay, now upload the packet and trigger a send if the transmitter 1046 * isn't already sending. If it is busy, the interrupt handler will 1047 * trigger the send later, upon receiving a Tx done interrupt. 1048 */ 1049 1050 if (length == skb->len) 1051 ei_block_output(dev, length, skb->data, output_page); 1052 else { 1053 memset(packet, 0, ETH_ZLEN); 1054 skb_copy_from_linear_data(skb, packet, skb->len); 1055 ei_block_output(dev, length, packet, output_page); 1056 } 1057 1058 if (! ei_local->txing) 1059 { 1060 ei_local->txing = 1; 1061 NS8390_trigger_send(dev, send_length, output_page); 1062 dev->trans_start = jiffies; 1063 if (output_page == ei_local->tx_start_page) 1064 { 1065 ei_local->tx1 = -1; 1066 ei_local->lasttx = -1; 1067 } 1068 else 1069 { 1070 ei_local->tx2 = -1; 1071 ei_local->lasttx = -2; 1072 } 1073 } 1074 else ei_local->txqueue++; 1075 1076 if (ei_local->tx1 && ei_local->tx2) 1077 netif_stop_queue(dev); 1078 else 1079 netif_start_queue(dev); 1080 1081 /* Turn 8390 interrupts back on. */ 1082 ei_local->irqlock = 0; 1083 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1084 1085 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1086 1087 dev_kfree_skb (skb); 1088 dev->stats.tx_bytes += send_length; 1089 1090 return NETDEV_TX_OK; 1091 } 1092 1093 /** 1094 * ax_interrupt - handle the interrupts from an 8390 1095 * @irq: interrupt number 1096 * @dev_id: a pointer to the net_device 1097 * 1098 * Handle the ether interface interrupts. We pull packets from 1099 * the 8390 via the card specific functions and fire them at the networking 1100 * stack. We also handle transmit completions and wake the transmit path if 1101 * necessary. We also update the counters and do other housekeeping as 1102 * needed. 1103 */ 1104 1105 static irqreturn_t ax_interrupt(int irq, void *dev_id) 1106 { 1107 struct net_device *dev = dev_id; 1108 long e8390_base; 1109 int interrupts, nr_serviced = 0, i; 1110 struct ei_device *ei_local; 1111 int handled = 0; 1112 unsigned long flags; 1113 1114 e8390_base = dev->base_addr; 1115 ei_local = netdev_priv(dev); 1116 1117 /* 1118 * Protect the irq test too. 1119 */ 1120 1121 spin_lock_irqsave(&ei_local->page_lock, flags); 1122 1123 if (ei_local->irqlock) { 1124 #if 1 /* This might just be an interrupt for a PCI device sharing this line */ 1125 const char *msg; 1126 /* The "irqlock" check is only for testing. */ 1127 if (ei_local->irqlock) 1128 msg = "Interrupted while interrupts are masked!"; 1129 else 1130 msg = "Reentering the interrupt handler!"; 1131 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n", 1132 msg, 1133 inb_p(e8390_base + EN0_ISR), 1134 inb_p(e8390_base + EN0_IMR)); 1135 #endif 1136 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1137 return IRQ_NONE; 1138 } 1139 1140 if (ei_debug > 3) 1141 netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n", 1142 inb_p(e8390_base + EN0_ISR)); 1143 1144 outb_p(0x00, e8390_base + EN0_ISR); 1145 ei_local->irqlock = 1; 1146 1147 /* !!Assumption!! -- we stay in page 0. Don't break this. */ 1148 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 && 1149 ++nr_serviced < MAX_SERVICE) 1150 { 1151 if (!netif_running(dev) || (interrupts == 0xff)) { 1152 if (ei_debug > 1) 1153 netdev_warn(dev, 1154 "interrupt from stopped card\n"); 1155 outb_p(interrupts, e8390_base + EN0_ISR); 1156 interrupts = 0; 1157 break; 1158 } 1159 handled = 1; 1160 1161 /* AX88190 bug fix. */ 1162 outb_p(interrupts, e8390_base + EN0_ISR); 1163 for (i = 0; i < 10; i++) { 1164 if (!(inb(e8390_base + EN0_ISR) & interrupts)) 1165 break; 1166 outb_p(0, e8390_base + EN0_ISR); 1167 outb_p(interrupts, e8390_base + EN0_ISR); 1168 } 1169 if (interrupts & ENISR_OVER) 1170 ei_rx_overrun(dev); 1171 else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) 1172 { 1173 /* Got a good (?) packet. */ 1174 ei_receive(dev); 1175 } 1176 /* Push the next to-transmit packet through. */ 1177 if (interrupts & ENISR_TX) 1178 ei_tx_intr(dev); 1179 else if (interrupts & ENISR_TX_ERR) 1180 ei_tx_err(dev); 1181 1182 if (interrupts & ENISR_COUNTERS) 1183 { 1184 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); 1185 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); 1186 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); 1187 } 1188 } 1189 1190 if (interrupts && ei_debug > 3) 1191 { 1192 handled = 1; 1193 if (nr_serviced >= MAX_SERVICE) 1194 { 1195 /* 0xFF is valid for a card removal */ 1196 if(interrupts!=0xFF) 1197 netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n", 1198 interrupts); 1199 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ 1200 } else { 1201 netdev_warn(dev, "unknown interrupt %#2x\n", 1202 interrupts); 1203 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ 1204 } 1205 } 1206 1207 /* Turn 8390 interrupts back on. */ 1208 ei_local->irqlock = 0; 1209 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1210 1211 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1212 return IRQ_RETVAL(handled); 1213 } 1214 1215 /** 1216 * ei_tx_err - handle transmitter error 1217 * @dev: network device which threw the exception 1218 * 1219 * A transmitter error has happened. Most likely excess collisions (which 1220 * is a fairly normal condition). If the error is one where the Tx will 1221 * have been aborted, we try and send another one right away, instead of 1222 * letting the failed packet sit and collect dust in the Tx buffer. This 1223 * is a much better solution as it avoids kernel based Tx timeouts, and 1224 * an unnecessary card reset. 1225 * 1226 * Called with lock held. 1227 */ 1228 1229 static void ei_tx_err(struct net_device *dev) 1230 { 1231 long e8390_base = dev->base_addr; 1232 unsigned char txsr = inb_p(e8390_base+EN0_TSR); 1233 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); 1234 1235 #ifdef VERBOSE_ERROR_DUMP 1236 netdev_printk(KERN_DEBUG, dev, 1237 "transmitter error (%#2x):", txsr); 1238 if (txsr & ENTSR_ABT) 1239 pr_cont(" excess-collisions"); 1240 if (txsr & ENTSR_ND) 1241 pr_cont(" non-deferral"); 1242 if (txsr & ENTSR_CRS) 1243 pr_cont(" lost-carrier"); 1244 if (txsr & ENTSR_FU) 1245 pr_cont(" FIFO-underrun"); 1246 if (txsr & ENTSR_CDH) 1247 pr_cont(" lost-heartbeat"); 1248 pr_cont("\n"); 1249 #endif 1250 1251 if (tx_was_aborted) 1252 ei_tx_intr(dev); 1253 else 1254 { 1255 dev->stats.tx_errors++; 1256 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; 1257 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; 1258 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; 1259 } 1260 } 1261 1262 /** 1263 * ei_tx_intr - transmit interrupt handler 1264 * @dev: network device for which tx intr is handled 1265 * 1266 * We have finished a transmit: check for errors and then trigger the next 1267 * packet to be sent. Called with lock held. 1268 */ 1269 1270 static void ei_tx_intr(struct net_device *dev) 1271 { 1272 long e8390_base = dev->base_addr; 1273 struct ei_device *ei_local = netdev_priv(dev); 1274 int status = inb(e8390_base + EN0_TSR); 1275 1276 /* 1277 * There are two Tx buffers, see which one finished, and trigger 1278 * the send of another one if it exists. 1279 */ 1280 ei_local->txqueue--; 1281 1282 if (ei_local->tx1 < 0) 1283 { 1284 if (ei_local->lasttx != 1 && ei_local->lasttx != -1) 1285 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n", 1286 ei_local->name, ei_local->lasttx, 1287 ei_local->tx1); 1288 ei_local->tx1 = 0; 1289 if (ei_local->tx2 > 0) 1290 { 1291 ei_local->txing = 1; 1292 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); 1293 dev->trans_start = jiffies; 1294 ei_local->tx2 = -1, 1295 ei_local->lasttx = 2; 1296 } 1297 else ei_local->lasttx = 20, ei_local->txing = 0; 1298 } 1299 else if (ei_local->tx2 < 0) 1300 { 1301 if (ei_local->lasttx != 2 && ei_local->lasttx != -2) 1302 netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n", 1303 ei_local->name, ei_local->lasttx, 1304 ei_local->tx2); 1305 ei_local->tx2 = 0; 1306 if (ei_local->tx1 > 0) 1307 { 1308 ei_local->txing = 1; 1309 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); 1310 dev->trans_start = jiffies; 1311 ei_local->tx1 = -1; 1312 ei_local->lasttx = 1; 1313 } 1314 else 1315 ei_local->lasttx = 10, ei_local->txing = 0; 1316 } 1317 // else 1318 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n", 1319 // ei_local->lasttx); 1320 1321 /* Minimize Tx latency: update the statistics after we restart TXing. */ 1322 if (status & ENTSR_COL) 1323 dev->stats.collisions++; 1324 if (status & ENTSR_PTX) 1325 dev->stats.tx_packets++; 1326 else 1327 { 1328 dev->stats.tx_errors++; 1329 if (status & ENTSR_ABT) 1330 { 1331 dev->stats.tx_aborted_errors++; 1332 dev->stats.collisions += 16; 1333 } 1334 if (status & ENTSR_CRS) 1335 dev->stats.tx_carrier_errors++; 1336 if (status & ENTSR_FU) 1337 dev->stats.tx_fifo_errors++; 1338 if (status & ENTSR_CDH) 1339 dev->stats.tx_heartbeat_errors++; 1340 if (status & ENTSR_OWC) 1341 dev->stats.tx_window_errors++; 1342 } 1343 netif_wake_queue(dev); 1344 } 1345 1346 /** 1347 * ei_receive - receive some packets 1348 * @dev: network device with which receive will be run 1349 * 1350 * We have a good packet(s), get it/them out of the buffers. 1351 * Called with lock held. 1352 */ 1353 1354 static void ei_receive(struct net_device *dev) 1355 { 1356 long e8390_base = dev->base_addr; 1357 struct ei_device *ei_local = netdev_priv(dev); 1358 unsigned char rxing_page, this_frame, next_frame; 1359 unsigned short current_offset; 1360 int rx_pkt_count = 0; 1361 struct e8390_pkt_hdr rx_frame; 1362 1363 while (++rx_pkt_count < 10) 1364 { 1365 int pkt_len, pkt_stat; 1366 1367 /* Get the rx page (incoming packet pointer). */ 1368 rxing_page = inb_p(e8390_base + EN1_CURPAG -1); 1369 1370 /* Remove one frame from the ring. Boundary is always a page behind. */ 1371 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; 1372 if (this_frame >= ei_local->stop_page) 1373 this_frame = ei_local->rx_start_page; 1374 1375 /* Someday we'll omit the previous, iff we never get this message. 1376 (There is at least one clone claimed to have a problem.) 1377 1378 Keep quiet if it looks like a card removal. One problem here 1379 is that some clones crash in roughly the same way. 1380 */ 1381 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) 1382 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n", 1383 this_frame, ei_local->current_page); 1384 1385 if (this_frame == rxing_page) /* Read all the frames? */ 1386 break; /* Done for now */ 1387 1388 current_offset = this_frame << 8; 1389 ei_get_8390_hdr(dev, &rx_frame, this_frame); 1390 1391 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); 1392 pkt_stat = rx_frame.status; 1393 1394 next_frame = this_frame + 1 + ((pkt_len+4)>>8); 1395 1396 if (pkt_len < 60 || pkt_len > 1518) 1397 { 1398 if (ei_debug) 1399 netdev_printk(KERN_DEBUG, dev, 1400 "bogus packet size: %d, status=%#2x nxpg=%#2x\n", 1401 rx_frame.count, rx_frame.status, 1402 rx_frame.next); 1403 dev->stats.rx_errors++; 1404 dev->stats.rx_length_errors++; 1405 } 1406 else if ((pkt_stat & 0x0F) == ENRSR_RXOK) 1407 { 1408 struct sk_buff *skb; 1409 1410 skb = netdev_alloc_skb(dev, pkt_len + 2); 1411 if (skb == NULL) 1412 { 1413 if (ei_debug > 1) 1414 netdev_printk(KERN_DEBUG, dev, 1415 "Couldn't allocate a sk_buff of size %d\n", 1416 pkt_len); 1417 dev->stats.rx_dropped++; 1418 break; 1419 } 1420 else 1421 { 1422 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ 1423 skb_put(skb, pkt_len); /* Make room */ 1424 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); 1425 skb->protocol=eth_type_trans(skb,dev); 1426 netif_rx(skb); 1427 dev->stats.rx_packets++; 1428 dev->stats.rx_bytes += pkt_len; 1429 if (pkt_stat & ENRSR_PHY) 1430 dev->stats.multicast++; 1431 } 1432 } 1433 else 1434 { 1435 if (ei_debug) 1436 netdev_printk(KERN_DEBUG, dev, 1437 "bogus packet: status=%#2x nxpg=%#2x size=%d\n", 1438 rx_frame.status, rx_frame.next, 1439 rx_frame.count); 1440 dev->stats.rx_errors++; 1441 /* NB: The NIC counts CRC, frame and missed errors. */ 1442 if (pkt_stat & ENRSR_FO) 1443 dev->stats.rx_fifo_errors++; 1444 } 1445 next_frame = rx_frame.next; 1446 1447 /* This _should_ never happen: it's here for avoiding bad clones. */ 1448 if (next_frame >= ei_local->stop_page) { 1449 netdev_info(dev, "next frame inconsistency, %#2x\n", 1450 next_frame); 1451 next_frame = ei_local->rx_start_page; 1452 } 1453 ei_local->current_page = next_frame; 1454 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); 1455 } 1456 } 1457 1458 /** 1459 * ei_rx_overrun - handle receiver overrun 1460 * @dev: network device which threw exception 1461 * 1462 * We have a receiver overrun: we have to kick the 8390 to get it started 1463 * again. Problem is that you have to kick it exactly as NS prescribes in 1464 * the updated datasheets, or "the NIC may act in an unpredictable manner." 1465 * This includes causing "the NIC to defer indefinitely when it is stopped 1466 * on a busy network." Ugh. 1467 * Called with lock held. Don't call this with the interrupts off or your 1468 * computer will hate you - it takes 10ms or so. 1469 */ 1470 1471 static void ei_rx_overrun(struct net_device *dev) 1472 { 1473 axnet_dev_t *info = PRIV(dev); 1474 long e8390_base = dev->base_addr; 1475 unsigned char was_txing, must_resend = 0; 1476 1477 /* 1478 * Record whether a Tx was in progress and then issue the 1479 * stop command. 1480 */ 1481 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; 1482 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); 1483 1484 if (ei_debug > 1) 1485 netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n"); 1486 dev->stats.rx_over_errors++; 1487 1488 /* 1489 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. 1490 * We wait at least 2ms. 1491 */ 1492 1493 mdelay(2); 1494 1495 /* 1496 * Reset RBCR[01] back to zero as per magic incantation. 1497 */ 1498 outb_p(0x00, e8390_base+EN0_RCNTLO); 1499 outb_p(0x00, e8390_base+EN0_RCNTHI); 1500 1501 /* 1502 * See if any Tx was interrupted or not. According to NS, this 1503 * step is vital, and skipping it will cause no end of havoc. 1504 */ 1505 1506 if (was_txing) 1507 { 1508 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); 1509 if (!tx_completed) 1510 must_resend = 1; 1511 } 1512 1513 /* 1514 * Have to enter loopback mode and then restart the NIC before 1515 * you are allowed to slurp packets up off the ring. 1516 */ 1517 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); 1518 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); 1519 1520 /* 1521 * Clear the Rx ring of all the debris, and ack the interrupt. 1522 */ 1523 ei_receive(dev); 1524 1525 /* 1526 * Leave loopback mode, and resend any packet that got stopped. 1527 */ 1528 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); 1529 if (must_resend) 1530 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); 1531 } 1532 1533 /* 1534 * Collect the stats. This is called unlocked and from several contexts. 1535 */ 1536 1537 static struct net_device_stats *get_stats(struct net_device *dev) 1538 { 1539 long ioaddr = dev->base_addr; 1540 struct ei_device *ei_local = netdev_priv(dev); 1541 unsigned long flags; 1542 1543 /* If the card is stopped, just return the present stats. */ 1544 if (!netif_running(dev)) 1545 return &dev->stats; 1546 1547 spin_lock_irqsave(&ei_local->page_lock,flags); 1548 /* Read the counter registers, assuming we are in page 0. */ 1549 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); 1550 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); 1551 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); 1552 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1553 1554 return &dev->stats; 1555 } 1556 1557 /* 1558 * Form the 64 bit 8390 multicast table from the linked list of addresses 1559 * associated with this dev structure. 1560 */ 1561 1562 static inline void make_mc_bits(u8 *bits, struct net_device *dev) 1563 { 1564 struct netdev_hw_addr *ha; 1565 u32 crc; 1566 1567 netdev_for_each_mc_addr(ha, dev) { 1568 crc = ether_crc(ETH_ALEN, ha->addr); 1569 /* 1570 * The 8390 uses the 6 most significant bits of the 1571 * CRC to index the multicast table. 1572 */ 1573 bits[crc>>29] |= (1<<((crc>>26)&7)); 1574 } 1575 } 1576 1577 /** 1578 * do_set_multicast_list - set/clear multicast filter 1579 * @dev: net device for which multicast filter is adjusted 1580 * 1581 * Set or clear the multicast filter for this adaptor. 1582 * Must be called with lock held. 1583 */ 1584 1585 static void do_set_multicast_list(struct net_device *dev) 1586 { 1587 long e8390_base = dev->base_addr; 1588 int i; 1589 struct ei_device *ei_local = netdev_priv(dev); 1590 1591 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) { 1592 memset(ei_local->mcfilter, 0, 8); 1593 if (!netdev_mc_empty(dev)) 1594 make_mc_bits(ei_local->mcfilter, dev); 1595 } else { 1596 /* set to accept-all */ 1597 memset(ei_local->mcfilter, 0xFF, 8); 1598 } 1599 1600 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); 1601 for(i = 0; i < 8; i++) 1602 { 1603 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); 1604 } 1605 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); 1606 1607 if(dev->flags&IFF_PROMISC) 1608 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); 1609 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) 1610 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); 1611 else 1612 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); 1613 1614 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); 1615 } 1616 1617 /* 1618 * Called without lock held. This is invoked from user context and may 1619 * be parallel to just about everything else. Its also fairly quick and 1620 * not called too often. Must protect against both bh and irq users 1621 */ 1622 1623 static void set_multicast_list(struct net_device *dev) 1624 { 1625 unsigned long flags; 1626 1627 spin_lock_irqsave(&dev_lock(dev), flags); 1628 do_set_multicast_list(dev); 1629 spin_unlock_irqrestore(&dev_lock(dev), flags); 1630 } 1631 1632 /* This page of functions should be 8390 generic */ 1633 /* Follow National Semi's recommendations for initializing the "NIC". */ 1634 1635 /** 1636 * AX88190_init - initialize 8390 hardware 1637 * @dev: network device to initialize 1638 * @startp: boolean. non-zero value to initiate chip processing 1639 * 1640 * Must be called with lock held. 1641 */ 1642 1643 static void AX88190_init(struct net_device *dev, int startp) 1644 { 1645 axnet_dev_t *info = PRIV(dev); 1646 long e8390_base = dev->base_addr; 1647 struct ei_device *ei_local = netdev_priv(dev); 1648 int i; 1649 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; 1650 1651 if(sizeof(struct e8390_pkt_hdr)!=4) 1652 panic("8390.c: header struct mispacked\n"); 1653 /* Follow National Semi's recommendations for initing the DP83902. */ 1654 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ 1655 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ 1656 /* Clear the remote byte count registers. */ 1657 outb_p(0x00, e8390_base + EN0_RCNTLO); 1658 outb_p(0x00, e8390_base + EN0_RCNTHI); 1659 /* Set to monitor and loopback mode -- this is vital!. */ 1660 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ 1661 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ 1662 /* Set the transmit page and receive ring. */ 1663 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); 1664 ei_local->tx1 = ei_local->tx2 = 0; 1665 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); 1666 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ 1667 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ 1668 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); 1669 /* Clear the pending interrupts and mask. */ 1670 outb_p(0xFF, e8390_base + EN0_ISR); 1671 outb_p(0x00, e8390_base + EN0_IMR); 1672 1673 /* Copy the station address into the DS8390 registers. */ 1674 1675 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ 1676 for(i = 0; i < 6; i++) 1677 { 1678 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); 1679 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) 1680 netdev_err(dev, "Hw. address read/write mismap %d\n", i); 1681 } 1682 1683 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); 1684 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); 1685 1686 netif_start_queue(dev); 1687 ei_local->tx1 = ei_local->tx2 = 0; 1688 ei_local->txing = 0; 1689 1690 if (info->flags & IS_AX88790) /* select Internal PHY */ 1691 outb(0x10, e8390_base + AXNET_GPIO); 1692 1693 if (startp) 1694 { 1695 outb_p(0xff, e8390_base + EN0_ISR); 1696 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1697 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); 1698 outb_p(E8390_TXCONFIG | info->duplex_flag, 1699 e8390_base + EN0_TXCR); /* xmit on. */ 1700 /* 3c503 TechMan says rxconfig only after the NIC is started. */ 1701 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ 1702 do_set_multicast_list(dev); /* (re)load the mcast table */ 1703 } 1704 } 1705 1706 /* Trigger a transmit start, assuming the length is valid. 1707 Always called with the page lock held */ 1708 1709 static void NS8390_trigger_send(struct net_device *dev, unsigned int length, 1710 int start_page) 1711 { 1712 long e8390_base = dev->base_addr; 1713 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev); 1714 1715 if (inb_p(e8390_base) & E8390_TRANS) 1716 { 1717 netdev_warn(dev, "trigger_send() called with the transmitter busy\n"); 1718 return; 1719 } 1720 outb_p(length & 0xff, e8390_base + EN0_TCNTLO); 1721 outb_p(length >> 8, e8390_base + EN0_TCNTHI); 1722 outb_p(start_page, e8390_base + EN0_TPSR); 1723 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); 1724 } 1725