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