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