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 module_pcmcia_driver(axnet_cs_driver); 732 733 /*====================================================================*/ 734 735 /* 8390.c: A general NS8390 ethernet driver core for linux. */ 736 /* 737 Written 1992-94 by Donald Becker. 738 739 Copyright 1993 United States Government as represented by the 740 Director, National Security Agency. 741 742 This software may be used and distributed according to the terms 743 of the GNU General Public License, incorporated herein by reference. 744 745 The author may be reached as becker@scyld.com, or C/O 746 Scyld Computing Corporation 747 410 Severn Ave., Suite 210 748 Annapolis MD 21403 749 750 This is the chip-specific code for many 8390-based ethernet adaptors. 751 This is not a complete driver, it must be combined with board-specific 752 code such as ne.c, wd.c, 3c503.c, etc. 753 754 Seeing how at least eight drivers use this code, (not counting the 755 PCMCIA ones either) it is easy to break some card by what seems like 756 a simple innocent change. Please contact me or Donald if you think 757 you have found something that needs changing. -- PG 758 759 Changelog: 760 761 Paul Gortmaker : remove set_bit lock, other cleanups. 762 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to 763 ei_block_input() for eth_io_copy_and_sum(). 764 Paul Gortmaker : exchange static int ei_pingpong for a #define, 765 also add better Tx error handling. 766 Paul Gortmaker : rewrite Rx overrun handling as per NS specs. 767 Alexey Kuznetsov : use the 8390's six bit hash multicast filter. 768 Paul Gortmaker : tweak ANK's above multicast changes a bit. 769 Paul Gortmaker : update packet statistics for v2.1.x 770 Alan Cox : support arbitrary stupid port mappings on the 771 68K Macintosh. Support >16bit I/O spaces 772 Paul Gortmaker : add kmod support for auto-loading of the 8390 773 module by all drivers that require it. 774 Alan Cox : Spinlocking work, added 'BUG_83C690' 775 Paul Gortmaker : Separate out Tx timeout code from Tx path. 776 777 Sources: 778 The National Semiconductor LAN Databook, and the 3Com 3c503 databook. 779 780 */ 781 782 #include <linux/bitops.h> 783 #include <asm/irq.h> 784 #include <linux/fcntl.h> 785 #include <linux/in.h> 786 #include <linux/interrupt.h> 787 788 #define BUG_83C690 789 790 /* These are the operational function interfaces to board-specific 791 routines. 792 void reset_8390(struct net_device *dev) 793 Resets the board associated with DEV, including a hardware reset of 794 the 8390. This is only called when there is a transmit timeout, and 795 it is always followed by 8390_init(). 796 void block_output(struct net_device *dev, int count, const unsigned char *buf, 797 int start_page) 798 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The 799 "page" value uses the 8390's 256-byte pages. 800 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) 801 Read the 4 byte, page aligned 8390 header. *If* there is a 802 subsequent read, it will be of the rest of the packet. 803 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) 804 Read COUNT bytes from the packet buffer into the skb data area. Start 805 reading from RING_OFFSET, the address as the 8390 sees it. This will always 806 follow the read of the 8390 header. 807 */ 808 #define ei_reset_8390 (ei_local->reset_8390) 809 #define ei_block_output (ei_local->block_output) 810 #define ei_block_input (ei_local->block_input) 811 #define ei_get_8390_hdr (ei_local->get_8390_hdr) 812 813 /* use 0 for production, 1 for verification, >2 for debug */ 814 #ifndef ei_debug 815 int ei_debug = 1; 816 #endif 817 818 /* Index to functions. */ 819 static void ei_tx_intr(struct net_device *dev); 820 static void ei_tx_err(struct net_device *dev); 821 static void ei_receive(struct net_device *dev); 822 static void ei_rx_overrun(struct net_device *dev); 823 824 /* Routines generic to NS8390-based boards. */ 825 static void NS8390_trigger_send(struct net_device *dev, unsigned int length, 826 int start_page); 827 static void do_set_multicast_list(struct net_device *dev); 828 829 /* 830 * SMP and the 8390 setup. 831 * 832 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is 833 * a page register that controls bank and packet buffer access. We guard 834 * this with ei_local->page_lock. Nobody should assume or set the page other 835 * than zero when the lock is not held. Lock holders must restore page 0 836 * before unlocking. Even pure readers must take the lock to protect in 837 * page 0. 838 * 839 * To make life difficult the chip can also be very slow. We therefore can't 840 * just use spinlocks. For the longer lockups we disable the irq the device 841 * sits on and hold the lock. We must hold the lock because there is a dual 842 * processor case other than interrupts (get stats/set multicast list in 843 * parallel with each other and transmit). 844 * 845 * Note: in theory we can just disable the irq on the card _but_ there is 846 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" 847 * enter lock, take the queued irq. So we waddle instead of flying. 848 * 849 * Finally by special arrangement for the purpose of being generally 850 * annoying the transmit function is called bh atomic. That places 851 * restrictions on the user context callers as disable_irq won't save 852 * them. 853 */ 854 855 /** 856 * ax_open - Open/initialize the board. 857 * @dev: network device to initialize 858 * 859 * This routine goes all-out, setting everything 860 * up anew at each open, even though many of these registers should only 861 * need to be set once at boot. 862 */ 863 static int ax_open(struct net_device *dev) 864 { 865 unsigned long flags; 866 struct ei_device *ei_local = netdev_priv(dev); 867 868 /* 869 * Grab the page lock so we own the register set, then call 870 * the init function. 871 */ 872 873 spin_lock_irqsave(&ei_local->page_lock, flags); 874 AX88190_init(dev, 1); 875 /* Set the flag before we drop the lock, That way the IRQ arrives 876 after its set and we get no silly warnings */ 877 netif_start_queue(dev); 878 spin_unlock_irqrestore(&ei_local->page_lock, flags); 879 ei_local->irqlock = 0; 880 return 0; 881 } 882 883 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) 884 885 /** 886 * ax_close - shut down network device 887 * @dev: network device to close 888 * 889 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. 890 */ 891 static int ax_close(struct net_device *dev) 892 { 893 unsigned long flags; 894 895 /* 896 * Hold the page lock during close 897 */ 898 899 spin_lock_irqsave(&dev_lock(dev), flags); 900 AX88190_init(dev, 0); 901 spin_unlock_irqrestore(&dev_lock(dev), flags); 902 netif_stop_queue(dev); 903 return 0; 904 } 905 906 /** 907 * axnet_tx_timeout - handle transmit time out condition 908 * @dev: network device which has apparently fallen asleep 909 * 910 * Called by kernel when device never acknowledges a transmit has 911 * completed (or failed) - i.e. never posted a Tx related interrupt. 912 */ 913 914 static void axnet_tx_timeout(struct net_device *dev) 915 { 916 long e8390_base = dev->base_addr; 917 struct ei_device *ei_local = netdev_priv(dev); 918 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev); 919 unsigned long flags; 920 921 dev->stats.tx_errors++; 922 923 spin_lock_irqsave(&ei_local->page_lock, flags); 924 txsr = inb(e8390_base+EN0_TSR); 925 isr = inb(e8390_base+EN0_ISR); 926 spin_unlock_irqrestore(&ei_local->page_lock, flags); 927 928 netdev_printk(KERN_DEBUG, dev, 929 "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", 930 (txsr & ENTSR_ABT) ? "excess collisions." : 931 (isr) ? "lost interrupt?" : "cable problem?", 932 txsr, isr, tickssofar); 933 934 if (!isr && !dev->stats.tx_packets) 935 { 936 /* The 8390 probably hasn't gotten on the cable yet. */ 937 ei_local->interface_num ^= 1; /* Try a different xcvr. */ 938 } 939 940 /* Ugly but a reset can be slow, yet must be protected */ 941 942 spin_lock_irqsave(&ei_local->page_lock, flags); 943 944 /* Try to restart the card. Perhaps the user has fixed something. */ 945 ei_reset_8390(dev); 946 AX88190_init(dev, 1); 947 948 spin_unlock_irqrestore(&ei_local->page_lock, flags); 949 netif_wake_queue(dev); 950 } 951 952 /** 953 * axnet_start_xmit - begin packet transmission 954 * @skb: packet to be sent 955 * @dev: network device to which packet is sent 956 * 957 * Sends a packet to an 8390 network device. 958 */ 959 960 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, 961 struct net_device *dev) 962 { 963 long e8390_base = dev->base_addr; 964 struct ei_device *ei_local = netdev_priv(dev); 965 int length, send_length, output_page; 966 unsigned long flags; 967 u8 packet[ETH_ZLEN]; 968 969 netif_stop_queue(dev); 970 971 length = skb->len; 972 973 /* Mask interrupts from the ethercard. 974 SMP: We have to grab the lock here otherwise the IRQ handler 975 on another CPU can flip window and race the IRQ mask set. We end 976 up trashing the mcast filter not disabling irqs if we don't lock */ 977 978 spin_lock_irqsave(&ei_local->page_lock, flags); 979 outb_p(0x00, e8390_base + EN0_IMR); 980 981 /* 982 * Slow phase with lock held. 983 */ 984 985 ei_local->irqlock = 1; 986 987 send_length = max(length, ETH_ZLEN); 988 989 /* 990 * We have two Tx slots available for use. Find the first free 991 * slot, and then perform some sanity checks. With two Tx bufs, 992 * you get very close to transmitting back-to-back packets. With 993 * only one Tx buf, the transmitter sits idle while you reload the 994 * card, leaving a substantial gap between each transmitted packet. 995 */ 996 997 if (ei_local->tx1 == 0) 998 { 999 output_page = ei_local->tx_start_page; 1000 ei_local->tx1 = send_length; 1001 if (ei_debug && ei_local->tx2 > 0) 1002 netdev_printk(KERN_DEBUG, dev, 1003 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n", 1004 ei_local->tx2, ei_local->lasttx, 1005 ei_local->txing); 1006 } 1007 else if (ei_local->tx2 == 0) 1008 { 1009 output_page = ei_local->tx_start_page + TX_PAGES/2; 1010 ei_local->tx2 = send_length; 1011 if (ei_debug && ei_local->tx1 > 0) 1012 netdev_printk(KERN_DEBUG, dev, 1013 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n", 1014 ei_local->tx1, ei_local->lasttx, 1015 ei_local->txing); 1016 } 1017 else 1018 { /* We should never get here. */ 1019 if (ei_debug) 1020 netdev_printk(KERN_DEBUG, dev, 1021 "No Tx buffers free! tx1=%d tx2=%d last=%d\n", 1022 ei_local->tx1, ei_local->tx2, 1023 ei_local->lasttx); 1024 ei_local->irqlock = 0; 1025 netif_stop_queue(dev); 1026 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1027 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1028 dev->stats.tx_errors++; 1029 return NETDEV_TX_BUSY; 1030 } 1031 1032 /* 1033 * Okay, now upload the packet and trigger a send if the transmitter 1034 * isn't already sending. If it is busy, the interrupt handler will 1035 * trigger the send later, upon receiving a Tx done interrupt. 1036 */ 1037 1038 if (length == skb->len) 1039 ei_block_output(dev, length, skb->data, output_page); 1040 else { 1041 memset(packet, 0, ETH_ZLEN); 1042 skb_copy_from_linear_data(skb, packet, skb->len); 1043 ei_block_output(dev, length, packet, output_page); 1044 } 1045 1046 if (! ei_local->txing) 1047 { 1048 ei_local->txing = 1; 1049 NS8390_trigger_send(dev, send_length, output_page); 1050 dev->trans_start = jiffies; 1051 if (output_page == ei_local->tx_start_page) 1052 { 1053 ei_local->tx1 = -1; 1054 ei_local->lasttx = -1; 1055 } 1056 else 1057 { 1058 ei_local->tx2 = -1; 1059 ei_local->lasttx = -2; 1060 } 1061 } 1062 else ei_local->txqueue++; 1063 1064 if (ei_local->tx1 && ei_local->tx2) 1065 netif_stop_queue(dev); 1066 else 1067 netif_start_queue(dev); 1068 1069 /* Turn 8390 interrupts back on. */ 1070 ei_local->irqlock = 0; 1071 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1072 1073 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1074 1075 dev_kfree_skb (skb); 1076 dev->stats.tx_bytes += send_length; 1077 1078 return NETDEV_TX_OK; 1079 } 1080 1081 /** 1082 * ax_interrupt - handle the interrupts from an 8390 1083 * @irq: interrupt number 1084 * @dev_id: a pointer to the net_device 1085 * 1086 * Handle the ether interface interrupts. We pull packets from 1087 * the 8390 via the card specific functions and fire them at the networking 1088 * stack. We also handle transmit completions and wake the transmit path if 1089 * necessary. We also update the counters and do other housekeeping as 1090 * needed. 1091 */ 1092 1093 static irqreturn_t ax_interrupt(int irq, void *dev_id) 1094 { 1095 struct net_device *dev = dev_id; 1096 long e8390_base; 1097 int interrupts, nr_serviced = 0, i; 1098 struct ei_device *ei_local; 1099 int handled = 0; 1100 unsigned long flags; 1101 1102 e8390_base = dev->base_addr; 1103 ei_local = netdev_priv(dev); 1104 1105 /* 1106 * Protect the irq test too. 1107 */ 1108 1109 spin_lock_irqsave(&ei_local->page_lock, flags); 1110 1111 if (ei_local->irqlock) { 1112 #if 1 /* This might just be an interrupt for a PCI device sharing this line */ 1113 const char *msg; 1114 /* The "irqlock" check is only for testing. */ 1115 if (ei_local->irqlock) 1116 msg = "Interrupted while interrupts are masked!"; 1117 else 1118 msg = "Reentering the interrupt handler!"; 1119 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n", 1120 msg, 1121 inb_p(e8390_base + EN0_ISR), 1122 inb_p(e8390_base + EN0_IMR)); 1123 #endif 1124 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1125 return IRQ_NONE; 1126 } 1127 1128 if (ei_debug > 3) 1129 netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n", 1130 inb_p(e8390_base + EN0_ISR)); 1131 1132 outb_p(0x00, e8390_base + EN0_ISR); 1133 ei_local->irqlock = 1; 1134 1135 /* !!Assumption!! -- we stay in page 0. Don't break this. */ 1136 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 && 1137 ++nr_serviced < MAX_SERVICE) 1138 { 1139 if (!netif_running(dev) || (interrupts == 0xff)) { 1140 if (ei_debug > 1) 1141 netdev_warn(dev, 1142 "interrupt from stopped card\n"); 1143 outb_p(interrupts, e8390_base + EN0_ISR); 1144 interrupts = 0; 1145 break; 1146 } 1147 handled = 1; 1148 1149 /* AX88190 bug fix. */ 1150 outb_p(interrupts, e8390_base + EN0_ISR); 1151 for (i = 0; i < 10; i++) { 1152 if (!(inb(e8390_base + EN0_ISR) & interrupts)) 1153 break; 1154 outb_p(0, e8390_base + EN0_ISR); 1155 outb_p(interrupts, e8390_base + EN0_ISR); 1156 } 1157 if (interrupts & ENISR_OVER) 1158 ei_rx_overrun(dev); 1159 else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) 1160 { 1161 /* Got a good (?) packet. */ 1162 ei_receive(dev); 1163 } 1164 /* Push the next to-transmit packet through. */ 1165 if (interrupts & ENISR_TX) 1166 ei_tx_intr(dev); 1167 else if (interrupts & ENISR_TX_ERR) 1168 ei_tx_err(dev); 1169 1170 if (interrupts & ENISR_COUNTERS) 1171 { 1172 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); 1173 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); 1174 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); 1175 } 1176 } 1177 1178 if (interrupts && ei_debug > 3) 1179 { 1180 handled = 1; 1181 if (nr_serviced >= MAX_SERVICE) 1182 { 1183 /* 0xFF is valid for a card removal */ 1184 if(interrupts!=0xFF) 1185 netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n", 1186 interrupts); 1187 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ 1188 } else { 1189 netdev_warn(dev, "unknown interrupt %#2x\n", 1190 interrupts); 1191 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ 1192 } 1193 } 1194 1195 /* Turn 8390 interrupts back on. */ 1196 ei_local->irqlock = 0; 1197 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1198 1199 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1200 return IRQ_RETVAL(handled); 1201 } 1202 1203 /** 1204 * ei_tx_err - handle transmitter error 1205 * @dev: network device which threw the exception 1206 * 1207 * A transmitter error has happened. Most likely excess collisions (which 1208 * is a fairly normal condition). If the error is one where the Tx will 1209 * have been aborted, we try and send another one right away, instead of 1210 * letting the failed packet sit and collect dust in the Tx buffer. This 1211 * is a much better solution as it avoids kernel based Tx timeouts, and 1212 * an unnecessary card reset. 1213 * 1214 * Called with lock held. 1215 */ 1216 1217 static void ei_tx_err(struct net_device *dev) 1218 { 1219 long e8390_base = dev->base_addr; 1220 unsigned char txsr = inb_p(e8390_base+EN0_TSR); 1221 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); 1222 1223 #ifdef VERBOSE_ERROR_DUMP 1224 netdev_printk(KERN_DEBUG, dev, 1225 "transmitter error (%#2x):", txsr); 1226 if (txsr & ENTSR_ABT) 1227 pr_cont(" excess-collisions"); 1228 if (txsr & ENTSR_ND) 1229 pr_cont(" non-deferral"); 1230 if (txsr & ENTSR_CRS) 1231 pr_cont(" lost-carrier"); 1232 if (txsr & ENTSR_FU) 1233 pr_cont(" FIFO-underrun"); 1234 if (txsr & ENTSR_CDH) 1235 pr_cont(" lost-heartbeat"); 1236 pr_cont("\n"); 1237 #endif 1238 1239 if (tx_was_aborted) 1240 ei_tx_intr(dev); 1241 else 1242 { 1243 dev->stats.tx_errors++; 1244 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; 1245 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; 1246 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; 1247 } 1248 } 1249 1250 /** 1251 * ei_tx_intr - transmit interrupt handler 1252 * @dev: network device for which tx intr is handled 1253 * 1254 * We have finished a transmit: check for errors and then trigger the next 1255 * packet to be sent. Called with lock held. 1256 */ 1257 1258 static void ei_tx_intr(struct net_device *dev) 1259 { 1260 long e8390_base = dev->base_addr; 1261 struct ei_device *ei_local = netdev_priv(dev); 1262 int status = inb(e8390_base + EN0_TSR); 1263 1264 /* 1265 * There are two Tx buffers, see which one finished, and trigger 1266 * the send of another one if it exists. 1267 */ 1268 ei_local->txqueue--; 1269 1270 if (ei_local->tx1 < 0) 1271 { 1272 if (ei_local->lasttx != 1 && ei_local->lasttx != -1) 1273 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n", 1274 ei_local->name, ei_local->lasttx, 1275 ei_local->tx1); 1276 ei_local->tx1 = 0; 1277 if (ei_local->tx2 > 0) 1278 { 1279 ei_local->txing = 1; 1280 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); 1281 dev->trans_start = jiffies; 1282 ei_local->tx2 = -1, 1283 ei_local->lasttx = 2; 1284 } 1285 else ei_local->lasttx = 20, ei_local->txing = 0; 1286 } 1287 else if (ei_local->tx2 < 0) 1288 { 1289 if (ei_local->lasttx != 2 && ei_local->lasttx != -2) 1290 netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n", 1291 ei_local->name, ei_local->lasttx, 1292 ei_local->tx2); 1293 ei_local->tx2 = 0; 1294 if (ei_local->tx1 > 0) 1295 { 1296 ei_local->txing = 1; 1297 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); 1298 dev->trans_start = jiffies; 1299 ei_local->tx1 = -1; 1300 ei_local->lasttx = 1; 1301 } 1302 else 1303 ei_local->lasttx = 10, ei_local->txing = 0; 1304 } 1305 // else 1306 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n", 1307 // ei_local->lasttx); 1308 1309 /* Minimize Tx latency: update the statistics after we restart TXing. */ 1310 if (status & ENTSR_COL) 1311 dev->stats.collisions++; 1312 if (status & ENTSR_PTX) 1313 dev->stats.tx_packets++; 1314 else 1315 { 1316 dev->stats.tx_errors++; 1317 if (status & ENTSR_ABT) 1318 { 1319 dev->stats.tx_aborted_errors++; 1320 dev->stats.collisions += 16; 1321 } 1322 if (status & ENTSR_CRS) 1323 dev->stats.tx_carrier_errors++; 1324 if (status & ENTSR_FU) 1325 dev->stats.tx_fifo_errors++; 1326 if (status & ENTSR_CDH) 1327 dev->stats.tx_heartbeat_errors++; 1328 if (status & ENTSR_OWC) 1329 dev->stats.tx_window_errors++; 1330 } 1331 netif_wake_queue(dev); 1332 } 1333 1334 /** 1335 * ei_receive - receive some packets 1336 * @dev: network device with which receive will be run 1337 * 1338 * We have a good packet(s), get it/them out of the buffers. 1339 * Called with lock held. 1340 */ 1341 1342 static void ei_receive(struct net_device *dev) 1343 { 1344 long e8390_base = dev->base_addr; 1345 struct ei_device *ei_local = netdev_priv(dev); 1346 unsigned char rxing_page, this_frame, next_frame; 1347 unsigned short current_offset; 1348 int rx_pkt_count = 0; 1349 struct e8390_pkt_hdr rx_frame; 1350 1351 while (++rx_pkt_count < 10) 1352 { 1353 int pkt_len, pkt_stat; 1354 1355 /* Get the rx page (incoming packet pointer). */ 1356 rxing_page = inb_p(e8390_base + EN1_CURPAG -1); 1357 1358 /* Remove one frame from the ring. Boundary is always a page behind. */ 1359 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; 1360 if (this_frame >= ei_local->stop_page) 1361 this_frame = ei_local->rx_start_page; 1362 1363 /* Someday we'll omit the previous, iff we never get this message. 1364 (There is at least one clone claimed to have a problem.) 1365 1366 Keep quiet if it looks like a card removal. One problem here 1367 is that some clones crash in roughly the same way. 1368 */ 1369 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) 1370 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n", 1371 this_frame, ei_local->current_page); 1372 1373 if (this_frame == rxing_page) /* Read all the frames? */ 1374 break; /* Done for now */ 1375 1376 current_offset = this_frame << 8; 1377 ei_get_8390_hdr(dev, &rx_frame, this_frame); 1378 1379 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); 1380 pkt_stat = rx_frame.status; 1381 1382 next_frame = this_frame + 1 + ((pkt_len+4)>>8); 1383 1384 if (pkt_len < 60 || pkt_len > 1518) 1385 { 1386 if (ei_debug) 1387 netdev_printk(KERN_DEBUG, dev, 1388 "bogus packet size: %d, status=%#2x nxpg=%#2x\n", 1389 rx_frame.count, rx_frame.status, 1390 rx_frame.next); 1391 dev->stats.rx_errors++; 1392 dev->stats.rx_length_errors++; 1393 } 1394 else if ((pkt_stat & 0x0F) == ENRSR_RXOK) 1395 { 1396 struct sk_buff *skb; 1397 1398 skb = netdev_alloc_skb(dev, pkt_len + 2); 1399 if (skb == NULL) 1400 { 1401 if (ei_debug > 1) 1402 netdev_printk(KERN_DEBUG, dev, 1403 "Couldn't allocate a sk_buff of size %d\n", 1404 pkt_len); 1405 dev->stats.rx_dropped++; 1406 break; 1407 } 1408 else 1409 { 1410 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ 1411 skb_put(skb, pkt_len); /* Make room */ 1412 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); 1413 skb->protocol=eth_type_trans(skb,dev); 1414 netif_rx(skb); 1415 dev->stats.rx_packets++; 1416 dev->stats.rx_bytes += pkt_len; 1417 if (pkt_stat & ENRSR_PHY) 1418 dev->stats.multicast++; 1419 } 1420 } 1421 else 1422 { 1423 if (ei_debug) 1424 netdev_printk(KERN_DEBUG, dev, 1425 "bogus packet: status=%#2x nxpg=%#2x size=%d\n", 1426 rx_frame.status, rx_frame.next, 1427 rx_frame.count); 1428 dev->stats.rx_errors++; 1429 /* NB: The NIC counts CRC, frame and missed errors. */ 1430 if (pkt_stat & ENRSR_FO) 1431 dev->stats.rx_fifo_errors++; 1432 } 1433 next_frame = rx_frame.next; 1434 1435 /* This _should_ never happen: it's here for avoiding bad clones. */ 1436 if (next_frame >= ei_local->stop_page) { 1437 netdev_info(dev, "next frame inconsistency, %#2x\n", 1438 next_frame); 1439 next_frame = ei_local->rx_start_page; 1440 } 1441 ei_local->current_page = next_frame; 1442 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); 1443 } 1444 } 1445 1446 /** 1447 * ei_rx_overrun - handle receiver overrun 1448 * @dev: network device which threw exception 1449 * 1450 * We have a receiver overrun: we have to kick the 8390 to get it started 1451 * again. Problem is that you have to kick it exactly as NS prescribes in 1452 * the updated datasheets, or "the NIC may act in an unpredictable manner." 1453 * This includes causing "the NIC to defer indefinitely when it is stopped 1454 * on a busy network." Ugh. 1455 * Called with lock held. Don't call this with the interrupts off or your 1456 * computer will hate you - it takes 10ms or so. 1457 */ 1458 1459 static void ei_rx_overrun(struct net_device *dev) 1460 { 1461 axnet_dev_t *info = PRIV(dev); 1462 long e8390_base = dev->base_addr; 1463 unsigned char was_txing, must_resend = 0; 1464 1465 /* 1466 * Record whether a Tx was in progress and then issue the 1467 * stop command. 1468 */ 1469 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; 1470 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); 1471 1472 if (ei_debug > 1) 1473 netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n"); 1474 dev->stats.rx_over_errors++; 1475 1476 /* 1477 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. 1478 * We wait at least 2ms. 1479 */ 1480 1481 mdelay(2); 1482 1483 /* 1484 * Reset RBCR[01] back to zero as per magic incantation. 1485 */ 1486 outb_p(0x00, e8390_base+EN0_RCNTLO); 1487 outb_p(0x00, e8390_base+EN0_RCNTHI); 1488 1489 /* 1490 * See if any Tx was interrupted or not. According to NS, this 1491 * step is vital, and skipping it will cause no end of havoc. 1492 */ 1493 1494 if (was_txing) 1495 { 1496 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); 1497 if (!tx_completed) 1498 must_resend = 1; 1499 } 1500 1501 /* 1502 * Have to enter loopback mode and then restart the NIC before 1503 * you are allowed to slurp packets up off the ring. 1504 */ 1505 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); 1506 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); 1507 1508 /* 1509 * Clear the Rx ring of all the debris, and ack the interrupt. 1510 */ 1511 ei_receive(dev); 1512 1513 /* 1514 * Leave loopback mode, and resend any packet that got stopped. 1515 */ 1516 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); 1517 if (must_resend) 1518 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); 1519 } 1520 1521 /* 1522 * Collect the stats. This is called unlocked and from several contexts. 1523 */ 1524 1525 static struct net_device_stats *get_stats(struct net_device *dev) 1526 { 1527 long ioaddr = dev->base_addr; 1528 struct ei_device *ei_local = netdev_priv(dev); 1529 unsigned long flags; 1530 1531 /* If the card is stopped, just return the present stats. */ 1532 if (!netif_running(dev)) 1533 return &dev->stats; 1534 1535 spin_lock_irqsave(&ei_local->page_lock,flags); 1536 /* Read the counter registers, assuming we are in page 0. */ 1537 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); 1538 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); 1539 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); 1540 spin_unlock_irqrestore(&ei_local->page_lock, flags); 1541 1542 return &dev->stats; 1543 } 1544 1545 /* 1546 * Form the 64 bit 8390 multicast table from the linked list of addresses 1547 * associated with this dev structure. 1548 */ 1549 1550 static inline void make_mc_bits(u8 *bits, struct net_device *dev) 1551 { 1552 struct netdev_hw_addr *ha; 1553 u32 crc; 1554 1555 netdev_for_each_mc_addr(ha, dev) { 1556 crc = ether_crc(ETH_ALEN, ha->addr); 1557 /* 1558 * The 8390 uses the 6 most significant bits of the 1559 * CRC to index the multicast table. 1560 */ 1561 bits[crc>>29] |= (1<<((crc>>26)&7)); 1562 } 1563 } 1564 1565 /** 1566 * do_set_multicast_list - set/clear multicast filter 1567 * @dev: net device for which multicast filter is adjusted 1568 * 1569 * Set or clear the multicast filter for this adaptor. 1570 * Must be called with lock held. 1571 */ 1572 1573 static void do_set_multicast_list(struct net_device *dev) 1574 { 1575 long e8390_base = dev->base_addr; 1576 int i; 1577 struct ei_device *ei_local = netdev_priv(dev); 1578 1579 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) { 1580 memset(ei_local->mcfilter, 0, 8); 1581 if (!netdev_mc_empty(dev)) 1582 make_mc_bits(ei_local->mcfilter, dev); 1583 } else { 1584 /* set to accept-all */ 1585 memset(ei_local->mcfilter, 0xFF, 8); 1586 } 1587 1588 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); 1589 for(i = 0; i < 8; i++) 1590 { 1591 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); 1592 } 1593 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); 1594 1595 if(dev->flags&IFF_PROMISC) 1596 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); 1597 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) 1598 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); 1599 else 1600 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); 1601 1602 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); 1603 } 1604 1605 /* 1606 * Called without lock held. This is invoked from user context and may 1607 * be parallel to just about everything else. Its also fairly quick and 1608 * not called too often. Must protect against both bh and irq users 1609 */ 1610 1611 static void set_multicast_list(struct net_device *dev) 1612 { 1613 unsigned long flags; 1614 1615 spin_lock_irqsave(&dev_lock(dev), flags); 1616 do_set_multicast_list(dev); 1617 spin_unlock_irqrestore(&dev_lock(dev), flags); 1618 } 1619 1620 /* This page of functions should be 8390 generic */ 1621 /* Follow National Semi's recommendations for initializing the "NIC". */ 1622 1623 /** 1624 * AX88190_init - initialize 8390 hardware 1625 * @dev: network device to initialize 1626 * @startp: boolean. non-zero value to initiate chip processing 1627 * 1628 * Must be called with lock held. 1629 */ 1630 1631 static void AX88190_init(struct net_device *dev, int startp) 1632 { 1633 axnet_dev_t *info = PRIV(dev); 1634 long e8390_base = dev->base_addr; 1635 struct ei_device *ei_local = netdev_priv(dev); 1636 int i; 1637 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; 1638 1639 if(sizeof(struct e8390_pkt_hdr)!=4) 1640 panic("8390.c: header struct mispacked\n"); 1641 /* Follow National Semi's recommendations for initing the DP83902. */ 1642 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ 1643 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ 1644 /* Clear the remote byte count registers. */ 1645 outb_p(0x00, e8390_base + EN0_RCNTLO); 1646 outb_p(0x00, e8390_base + EN0_RCNTHI); 1647 /* Set to monitor and loopback mode -- this is vital!. */ 1648 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ 1649 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ 1650 /* Set the transmit page and receive ring. */ 1651 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); 1652 ei_local->tx1 = ei_local->tx2 = 0; 1653 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); 1654 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ 1655 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ 1656 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); 1657 /* Clear the pending interrupts and mask. */ 1658 outb_p(0xFF, e8390_base + EN0_ISR); 1659 outb_p(0x00, e8390_base + EN0_IMR); 1660 1661 /* Copy the station address into the DS8390 registers. */ 1662 1663 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ 1664 for(i = 0; i < 6; i++) 1665 { 1666 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); 1667 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) 1668 netdev_err(dev, "Hw. address read/write mismap %d\n", i); 1669 } 1670 1671 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); 1672 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); 1673 1674 netif_start_queue(dev); 1675 ei_local->tx1 = ei_local->tx2 = 0; 1676 ei_local->txing = 0; 1677 1678 if (info->flags & IS_AX88790) /* select Internal PHY */ 1679 outb(0x10, e8390_base + AXNET_GPIO); 1680 1681 if (startp) 1682 { 1683 outb_p(0xff, e8390_base + EN0_ISR); 1684 outb_p(ENISR_ALL, e8390_base + EN0_IMR); 1685 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); 1686 outb_p(E8390_TXCONFIG | info->duplex_flag, 1687 e8390_base + EN0_TXCR); /* xmit on. */ 1688 /* 3c503 TechMan says rxconfig only after the NIC is started. */ 1689 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ 1690 do_set_multicast_list(dev); /* (re)load the mcast table */ 1691 } 1692 } 1693 1694 /* Trigger a transmit start, assuming the length is valid. 1695 Always called with the page lock held */ 1696 1697 static void NS8390_trigger_send(struct net_device *dev, unsigned int length, 1698 int start_page) 1699 { 1700 long e8390_base = dev->base_addr; 1701 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev); 1702 1703 if (inb_p(e8390_base) & E8390_TRANS) 1704 { 1705 netdev_warn(dev, "trigger_send() called with the transmitter busy\n"); 1706 return; 1707 } 1708 outb_p(length & 0xff, e8390_base + EN0_TCNTLO); 1709 outb_p(length >> 8, e8390_base + EN0_TCNTHI); 1710 outb_p(start_page, e8390_base + EN0_TPSR); 1711 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); 1712 } 1713