drivers/net/ethernet/8390/ne.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
do_ne_probe
ne_probe_isapnp
ne_probe1
ne_reset_8390
ne_get_8390_hdr
ne_block_input
ne_block_output
ne_drv_probe
ne_drv_remove
ne_loop_rm_unreg
ne_drv_suspend
ne_drv_resume
ne_add_devices
init_module
ne_init
ne_probe
ne_exit
   1 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
   2 /*
   3     Written 1992-94 by Donald Becker.
   4 
   5     Copyright 1993 United States Government as represented by the
   6     Director, National Security Agency.
   7 
   8     This software may be used and distributed according to the terms
   9     of the GNU General Public License, incorporated herein by reference.
  10 
  11     The author may be reached as becker@scyld.com, or C/O
  12     Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
  13 
  14     This driver should work with many programmed-I/O 8390-based ethernet
  15     boards.  Currently it supports the NE1000, NE2000, many clones,
  16     and some Cabletron products.
  17 
  18     Changelog:
  19 
  20     Paul Gortmaker      : use ENISR_RDC to monitor Tx PIO uploads, made
  21                           sanity checks and bad clone support optional.
  22     Paul Gortmaker      : new reset code, reset card after probe at boot.
  23     Paul Gortmaker      : multiple card support for module users.
  24     Paul Gortmaker      : Support for PCI ne2k clones, similar to lance.c
  25     Paul Gortmaker      : Allow users with bad cards to avoid full probe.
  26     Paul Gortmaker      : PCI probe changes, more PCI cards supported.
  27     rjohnson@analogic.com : Changed init order so an interrupt will only
  28     occur after memory is allocated for dev->priv. Deallocated memory
  29     last in cleanup_modue()
  30     Richard Guenther    : Added support for ISAPnP cards
  31     Paul Gortmaker      : Discontinued PCI support - use ne2k-pci.c instead.
  32     Hayato Fujiwara     : Add m32r support.
  33 
  34 */
  35 
  36 /* Routines for the NatSemi-based designs (NE[12]000). */
  37 
  38 static const char version1[] =
  39 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
  40 static const char version2[] =
  41 "Last modified Nov 1, 2000 by Paul Gortmaker\n";
  42 
  43 
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/errno.h>
  47 #include <linux/isapnp.h>
  48 #include <linux/init.h>
  49 #include <linux/interrupt.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/etherdevice.h>
  53 #include <linux/jiffies.h>
  54 #include <linux/platform_device.h>
  55 
  56 #include <asm/io.h>
  57 
  58 #include "8390.h"
  59 
  60 #define DRV_NAME "ne"
  61 
  62 /* Some defines that people can play with if so inclined. */
  63 
  64 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
  65 #define SUPPORT_NE_BAD_CLONES
  66 /* 0xbad = bad sig or no reset ack */
  67 #define BAD 0xbad
  68 
  69 #define MAX_NE_CARDS    4       /* Max number of NE cards per module */
  70 static struct platform_device *pdev_ne[MAX_NE_CARDS];
  71 static int io[MAX_NE_CARDS];
  72 static int irq[MAX_NE_CARDS];
  73 static int bad[MAX_NE_CARDS];
  74 static u32 ne_msg_enable;
  75 
  76 #ifdef MODULE
  77 module_param_hw_array(io, int, ioport, NULL, 0);
  78 module_param_hw_array(irq, int, irq, NULL, 0);
  79 module_param_array(bad, int, NULL, 0);
  80 module_param_named(msg_enable, ne_msg_enable, uint, 0444);
  81 MODULE_PARM_DESC(io, "I/O base address(es),required");
  82 MODULE_PARM_DESC(irq, "IRQ number(s)");
  83 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
  84 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
  85 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
  86 MODULE_LICENSE("GPL");
  87 #endif /* MODULE */
  88 
  89 /* Do we perform extra sanity checks on stuff ? */
  90 /* #define NE_SANITY_CHECK */
  91 
  92 /* Do we implement the read before write bugfix ? */
  93 /* #define NE_RW_BUGFIX */
  94 
  95 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
  96 /* #define PACKETBUF_MEMSIZE    0x40 */
  97 
  98 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
  99 that the ne2k probe is the last 8390 based probe to take place (as it
 100 is at boot) and so the probe will get confused by any other 8390 cards.
 101 ISA device autoprobes on a running machine are not recommended anyway. */
 102 #if !defined(MODULE) && defined(CONFIG_ISA)
 103 /* Do we need a portlist for the ISA auto-probe ? */
 104 #define NEEDS_PORTLIST
 105 #endif
 106 
 107 /* A zero-terminated list of I/O addresses to be probed at boot. */
 108 #ifdef NEEDS_PORTLIST
 109 static unsigned int netcard_portlist[] __initdata = {
 110         0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
 111 };
 112 #endif
 113 
 114 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
 115         {       ISAPNP_CARD_ID('A','X','E',0x2011),
 116                 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
 117                 (long) "NetGear EA201" },
 118         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 119                 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
 120                 (long) "NN NE2000" },
 121         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 122                 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
 123                 (long) "Generic PNP" },
 124         { }     /* terminate list */
 125 };
 126 
 127 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
 128 
 129 #ifdef SUPPORT_NE_BAD_CLONES
 130 /* A list of bad clones that we none-the-less recognize. */
 131 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
 132 bad_clone_list[] __initdata = {
 133     {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
 134     {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
 135     {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
 136     {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
 137     {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
 138     {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
 139     {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
 140     {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
 141     {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
 142     {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
 143     {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
 144     {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
 145     {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
 146 #ifdef CONFIG_MACH_TX49XX
 147     {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}},  /* Toshiba built-in */
 148 #endif
 149     {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
 150     {NULL,}
 151 };
 152 #endif
 153 
 154 /* ---- No user-serviceable parts below ---- */
 155 
 156 #define NE_BASE  (dev->base_addr)
 157 #define NE_CMD          0x00
 158 #define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
 159 #define NE_RESET        0x1f    /* Issue a read to reset, a write to clear. */
 160 #define NE_IO_EXTENT    0x20
 161 
 162 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
 163 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
 164 #define NESM_START_PG   0x40    /* First page of TX buffer */
 165 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
 166 
 167 #if defined(CONFIG_MACH_TX49XX)
 168 #  define DCR_VAL 0x48          /* 8-bit mode */
 169 #elif defined(CONFIG_ATARI)     /* 8-bit mode on Atari, normal on Q40 */
 170 #  define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
 171 #else
 172 #  define DCR_VAL 0x49
 173 #endif
 174 
 175 static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
 176 static int ne_probe_isapnp(struct net_device *dev);
 177 
 178 static void ne_reset_8390(struct net_device *dev);
 179 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
 180                           int ring_page);
 181 static void ne_block_input(struct net_device *dev, int count,
 182                           struct sk_buff *skb, int ring_offset);
 183 static void ne_block_output(struct net_device *dev, const int count,
 184                 const unsigned char *buf, const int start_page);
 185 
 186 
 187 /*  Probe for various non-shared-memory ethercards.
 188 
 189    NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
 190    buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
 191    the SAPROM, while other supposed NE2000 clones must be detected by their
 192    SA prefix.
 193 
 194    Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
 195    mode results in doubled values, which can be detected and compensated for.
 196 
 197    The probe is also responsible for initializing the card and filling
 198    in the 'dev' and 'ei_status' structures.
 199 
 200    We use the minimum memory size for some ethercard product lines, iff we can't
 201    distinguish models.  You can increase the packet buffer size by setting
 202    PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
 203         E1010   starts at 0x100 and ends at 0x2000.
 204         E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
 205         E2010    starts at 0x100 and ends at 0x4000.
 206         E2010-x starts at 0x100 and ends at 0xffff.  */
 207 
 208 static int __init do_ne_probe(struct net_device *dev)
 209 {
 210         unsigned long base_addr = dev->base_addr;
 211 #ifdef NEEDS_PORTLIST
 212         int orig_irq = dev->irq;
 213 #endif
 214 
 215         /* First check any supplied i/o locations. User knows best. <cough> */
 216         if (base_addr > 0x1ff) {        /* Check a single specified location. */
 217                 int ret = ne_probe1(dev, base_addr);
 218                 if (ret)
 219                         netdev_warn(dev, "ne.c: No NE*000 card found at "
 220                                     "i/o = %#lx\n", base_addr);
 221                 return ret;
 222         }
 223         else if (base_addr != 0)        /* Don't probe at all. */
 224                 return -ENXIO;
 225 
 226         /* Then look for any installed ISAPnP clones */
 227         if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
 228                 return 0;
 229 
 230 #ifdef NEEDS_PORTLIST
 231         /* Last resort. The semi-risky ISA auto-probe. */
 232         for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
 233                 int ioaddr = netcard_portlist[base_addr];
 234                 dev->irq = orig_irq;
 235                 if (ne_probe1(dev, ioaddr) == 0)
 236                         return 0;
 237         }
 238 #endif
 239 
 240         return -ENODEV;
 241 }
 242 
 243 static int __init ne_probe_isapnp(struct net_device *dev)
 244 {
 245         int i;
 246 
 247         for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
 248                 struct pnp_dev *idev = NULL;
 249 
 250                 while ((idev = pnp_find_dev(NULL,
 251                                             isapnp_clone_list[i].vendor,
 252                                             isapnp_clone_list[i].function,
 253                                             idev))) {
 254                         /* Avoid already found cards from previous calls */
 255                         if (pnp_device_attach(idev) < 0)
 256                                 continue;
 257                         if (pnp_activate_dev(idev) < 0) {
 258                                 pnp_device_detach(idev);
 259                                 continue;
 260                         }
 261                         /* if no io and irq, search for next */
 262                         if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
 263                                 pnp_device_detach(idev);
 264                                 continue;
 265                         }
 266                         /* found it */
 267                         dev->base_addr = pnp_port_start(idev, 0);
 268                         dev->irq = pnp_irq(idev, 0);
 269                         netdev_info(dev,
 270                                     "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
 271                                     (char *) isapnp_clone_list[i].driver_data,
 272                                     dev->base_addr, dev->irq);
 273                         if (ne_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
 274                                 netdev_err(dev,
 275                                            "ne.c: Probe of ISAPnP card at %#lx failed.\n",
 276                                            dev->base_addr);
 277                                 pnp_device_detach(idev);
 278                                 return -ENXIO;
 279                         }
 280                         ei_status.priv = (unsigned long)idev;
 281                         break;
 282                 }
 283                 if (!idev)
 284                         continue;
 285                 return 0;
 286         }
 287 
 288         return -ENODEV;
 289 }
 290 
 291 static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
 292 {
 293         int i;
 294         unsigned char SA_prom[32];
 295         int wordlength = 2;
 296         const char *name = NULL;
 297         int start_page, stop_page;
 298         int neX000, ctron, copam, bad_card;
 299         int reg0, ret;
 300         static unsigned version_printed;
 301         struct ei_device *ei_local = netdev_priv(dev);
 302 
 303         if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
 304                 return -EBUSY;
 305 
 306         reg0 = inb_p(ioaddr);
 307         if (reg0 == 0xFF) {
 308                 ret = -ENODEV;
 309                 goto err_out;
 310         }
 311 
 312         /* Do a preliminary verification that we have a 8390. */
 313         {
 314                 int regd;
 315                 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
 316                 regd = inb_p(ioaddr + 0x0d);
 317                 outb_p(0xff, ioaddr + 0x0d);
 318                 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
 319                 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
 320                 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
 321                         outb_p(reg0, ioaddr);
 322                         outb_p(regd, ioaddr + 0x0d);    /* Restore the old values. */
 323                         ret = -ENODEV;
 324                         goto err_out;
 325                 }
 326         }
 327 
 328         if ((ne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
 329                 netdev_info(dev, "%s%s", version1, version2);
 330 
 331         netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
 332 
 333         /* A user with a poor card that fails to ack the reset, or that
 334            does not have a valid 0x57,0x57 signature can still use this
 335            without having to recompile. Specifying an i/o address along
 336            with an otherwise unused dev->mem_end value of "0xBAD" will
 337            cause the driver to skip these parts of the probe. */
 338 
 339         bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
 340 
 341         /* Reset card. Who knows what dain-bramaged state it was left in. */
 342 
 343         {
 344                 unsigned long reset_start_time = jiffies;
 345 
 346                 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 347                 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 348 
 349                 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
 350                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 351                         if (bad_card) {
 352                                 pr_cont(" (warning: no reset ack)");
 353                                 break;
 354                         } else {
 355                                 pr_cont(" not found (no reset ack).\n");
 356                                 ret = -ENODEV;
 357                                 goto err_out;
 358                         }
 359                 }
 360 
 361                 outb_p(0xff, ioaddr + EN0_ISR);         /* Ack all intr. */
 362         }
 363 
 364         /* Read the 16 bytes of station address PROM.
 365            We must first initialize registers, similar to NS8390p_init(eifdev, 0).
 366            We can't reliably read the SAPROM address without this.
 367            (I learned the hard way!). */
 368         {
 369                 struct {unsigned char value, offset; } program_seq[] =
 370                 {
 371                         {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
 372                         {0x48,  EN0_DCFG},      /* Set byte-wide (0x48) access. */
 373                         {0x00,  EN0_RCNTLO},    /* Clear the count regs. */
 374                         {0x00,  EN0_RCNTHI},
 375                         {0x00,  EN0_IMR},       /* Mask completion irq. */
 376                         {0xFF,  EN0_ISR},
 377                         {E8390_RXOFF, EN0_RXCR},        /* 0x20  Set to monitor */
 378                         {E8390_TXOFF, EN0_TXCR},        /* 0x02  and loopback mode. */
 379                         {32,    EN0_RCNTLO},
 380                         {0x00,  EN0_RCNTHI},
 381                         {0x00,  EN0_RSARLO},    /* DMA starting at 0x0000. */
 382                         {0x00,  EN0_RSARHI},
 383                         {E8390_RREAD+E8390_START, E8390_CMD},
 384                 };
 385 
 386                 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
 387                         outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
 388 
 389         }
 390         for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
 391                 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
 392                 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
 393                 if (SA_prom[i] != SA_prom[i+1])
 394                         wordlength = 1;
 395         }
 396 
 397         if (wordlength == 2)
 398         {
 399                 for (i = 0; i < 16; i++)
 400                         SA_prom[i] = SA_prom[i+i];
 401                 /* We must set the 8390 for word mode. */
 402                 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
 403                 start_page = NESM_START_PG;
 404 
 405                 /*
 406                  * Realtek RTL8019AS datasheet says that the PSTOP register
 407                  * shouldn't exceed 0x60 in 8-bit mode.
 408                  * This chip can be identified by reading the signature from
 409                  * the  remote byte count registers (otherwise write-only)...
 410                  */
 411                 if ((DCR_VAL & 0x01) == 0 &&            /* 8-bit mode */
 412                     inb(ioaddr + EN0_RCNTLO) == 0x50 &&
 413                     inb(ioaddr + EN0_RCNTHI) == 0x70)
 414                         stop_page = 0x60;
 415                 else
 416                         stop_page = NESM_STOP_PG;
 417         } else {
 418                 start_page = NE1SM_START_PG;
 419                 stop_page  = NE1SM_STOP_PG;
 420         }
 421 
 422         neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
 423         ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
 424         copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
 425 
 426         /* Set up the rest of the parameters. */
 427         if (neX000 || bad_card || copam) {
 428                 name = (wordlength == 2) ? "NE2000" : "NE1000";
 429         }
 430         else if (ctron)
 431         {
 432                 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
 433                 start_page = 0x01;
 434                 stop_page = (wordlength == 2) ? 0x40 : 0x20;
 435         }
 436         else
 437         {
 438 #ifdef SUPPORT_NE_BAD_CLONES
 439                 /* Ack!  Well, there might be a *bad* NE*000 clone there.
 440                    Check for total bogus addresses. */
 441                 for (i = 0; bad_clone_list[i].name8; i++)
 442                 {
 443                         if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
 444                                 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
 445                                 SA_prom[2] == bad_clone_list[i].SAprefix[2])
 446                         {
 447                                 if (wordlength == 2)
 448                                 {
 449                                         name = bad_clone_list[i].name16;
 450                                 } else {
 451                                         name = bad_clone_list[i].name8;
 452                                 }
 453                                 break;
 454                         }
 455                 }
 456                 if (bad_clone_list[i].name8 == NULL)
 457                 {
 458                         pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
 459                                 SA_prom[14], SA_prom[15]);
 460                         ret = -ENXIO;
 461                         goto err_out;
 462                 }
 463 #else
 464                 pr_cont(" not found.\n");
 465                 ret = -ENXIO;
 466                 goto err_out;
 467 #endif
 468         }
 469 
 470         if (dev->irq < 2)
 471         {
 472                 unsigned long cookie = probe_irq_on();
 473                 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
 474                 outb_p(0x00, ioaddr + EN0_RCNTLO);
 475                 outb_p(0x00, ioaddr + EN0_RCNTHI);
 476                 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
 477                 mdelay(10);             /* wait 10ms for interrupt to propagate */
 478                 outb_p(0x00, ioaddr + EN0_IMR);                 /* Mask it again. */
 479                 dev->irq = probe_irq_off(cookie);
 480                 if (ne_msg_enable & NETIF_MSG_PROBE)
 481                         pr_cont(" autoirq is %d", dev->irq);
 482         } else if (dev->irq == 2)
 483                 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
 484                    or don't know which one to set. */
 485                 dev->irq = 9;
 486 
 487         if (! dev->irq) {
 488                 pr_cont(" failed to detect IRQ line.\n");
 489                 ret = -EAGAIN;
 490                 goto err_out;
 491         }
 492 
 493         /* Snarf the interrupt now.  There's no point in waiting since we cannot
 494            share and the board will usually be enabled. */
 495         ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
 496         if (ret) {
 497                 pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
 498                 goto err_out;
 499         }
 500 
 501         dev->base_addr = ioaddr;
 502 
 503         for (i = 0; i < ETH_ALEN; i++) {
 504                 dev->dev_addr[i] = SA_prom[i];
 505         }
 506 
 507         pr_cont("%pM\n", dev->dev_addr);
 508 
 509         ei_status.name = name;
 510         ei_status.tx_start_page = start_page;
 511         ei_status.stop_page = stop_page;
 512 
 513         /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
 514         ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
 515 
 516         ei_status.rx_start_page = start_page + TX_PAGES;
 517 #ifdef PACKETBUF_MEMSIZE
 518          /* Allow the packet buffer size to be overridden by know-it-alls. */
 519         ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
 520 #endif
 521 
 522         ei_status.reset_8390 = &ne_reset_8390;
 523         ei_status.block_input = &ne_block_input;
 524         ei_status.block_output = &ne_block_output;
 525         ei_status.get_8390_hdr = &ne_get_8390_hdr;
 526         ei_status.priv = 0;
 527 
 528         dev->netdev_ops = &eip_netdev_ops;
 529         NS8390p_init(dev, 0);
 530 
 531         ei_local->msg_enable = ne_msg_enable;
 532         ret = register_netdev(dev);
 533         if (ret)
 534                 goto out_irq;
 535         netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
 536                     name, ioaddr, dev->irq);
 537         return 0;
 538 
 539 out_irq:
 540         free_irq(dev->irq, dev);
 541 err_out:
 542         release_region(ioaddr, NE_IO_EXTENT);
 543         return ret;
 544 }
 545 
 546 /* Hard reset the card.  This used to pause for the same period that a
 547    8390 reset command required, but that shouldn't be necessary. */
 548 
 549 static void ne_reset_8390(struct net_device *dev)
 550 {
 551         unsigned long reset_start_time = jiffies;
 552         struct ei_device *ei_local = netdev_priv(dev);
 553 
 554         netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
 555 
 556         /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 557         outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 558 
 559         ei_status.txing = 0;
 560         ei_status.dmaing = 0;
 561 
 562         /* This check _should_not_ be necessary, omit eventually. */
 563         while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
 564                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 565                         netdev_err(dev, "ne_reset_8390() did not complete.\n");
 566                         break;
 567                 }
 568         outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
 569 }
 570 
 571 /* Grab the 8390 specific header. Similar to the block_input routine, but
 572    we don't need to be concerned with ring wrap as the header will be at
 573    the start of a page, so we optimize accordingly. */
 574 
 575 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 576 {
 577         int nic_base = dev->base_addr;
 578 
 579         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 580 
 581         if (ei_status.dmaing)
 582         {
 583                 netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
 584                            "[DMAstat:%d][irqlock:%d].\n",
 585                            ei_status.dmaing, ei_status.irqlock);
 586                 return;
 587         }
 588 
 589         ei_status.dmaing |= 0x01;
 590         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 591         outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 592         outb_p(0, nic_base + EN0_RCNTHI);
 593         outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
 594         outb_p(ring_page, nic_base + EN0_RSARHI);
 595         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 596 
 597         if (ei_status.word16)
 598                 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
 599         else
 600                 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
 601 
 602         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 603         ei_status.dmaing &= ~0x01;
 604 
 605         le16_to_cpus(&hdr->count);
 606 }
 607 
 608 /* Block input and output, similar to the Crynwr packet driver.  If you
 609    are porting to a new ethercard, look at the packet driver source for hints.
 610    The NEx000 doesn't share the on-board packet memory -- you have to put
 611    the packet out through the "remote DMA" dataport using outb. */
 612 
 613 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 614 {
 615 #ifdef NE_SANITY_CHECK
 616         int xfer_count = count;
 617         struct ei_device *ei_local = netdev_priv(dev);
 618 #endif
 619         int nic_base = dev->base_addr;
 620         char *buf = skb->data;
 621 
 622         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 623         if (ei_status.dmaing)
 624         {
 625                 netdev_err(dev, "DMAing conflict in ne_block_input "
 626                            "[DMAstat:%d][irqlock:%d].\n",
 627                            ei_status.dmaing, ei_status.irqlock);
 628                 return;
 629         }
 630         ei_status.dmaing |= 0x01;
 631         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 632         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 633         outb_p(count >> 8, nic_base + EN0_RCNTHI);
 634         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 635         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 636         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 637         if (ei_status.word16)
 638         {
 639                 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
 640                 if (count & 0x01)
 641                 {
 642                         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 643 #ifdef NE_SANITY_CHECK
 644                         xfer_count++;
 645 #endif
 646                 }
 647         } else {
 648                 insb(NE_BASE + NE_DATAPORT, buf, count);
 649         }
 650 
 651 #ifdef NE_SANITY_CHECK
 652         /* This was for the ALPHA version only, but enough people have
 653            been encountering problems so it is still here.  If you see
 654            this message you either 1) have a slightly incompatible clone
 655            or 2) have noise/speed problems with your bus. */
 656 
 657         if (netif_msg_rx_status(ei_local))
 658         {
 659                 /* DMA termination address check... */
 660                 int addr, tries = 20;
 661                 do {
 662                         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
 663                            -- it's broken for Rx on some cards! */
 664                         int high = inb_p(nic_base + EN0_RSARHI);
 665                         int low = inb_p(nic_base + EN0_RSARLO);
 666                         addr = (high << 8) + low;
 667                         if (((ring_offset + xfer_count) & 0xff) == low)
 668                                 break;
 669                 } while (--tries > 0);
 670                 if (tries <= 0)
 671                         netdev_warn(dev, "RX transfer address mismatch,"
 672                                     "%#4.4x (expected) vs. %#4.4x (actual).\n",
 673                                     ring_offset + xfer_count, addr);
 674         }
 675 #endif
 676         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 677         ei_status.dmaing &= ~0x01;
 678 }
 679 
 680 static void ne_block_output(struct net_device *dev, int count,
 681                 const unsigned char *buf, const int start_page)
 682 {
 683         int nic_base = NE_BASE;
 684         unsigned long dma_start;
 685 #ifdef NE_SANITY_CHECK
 686         int retries = 0;
 687         struct ei_device *ei_local = netdev_priv(dev);
 688 #endif
 689 
 690         /* Round the count up for word writes.  Do we need to do this?
 691            What effect will an odd byte count have on the 8390?
 692            I should check someday. */
 693 
 694         if (ei_status.word16 && (count & 0x01))
 695                 count++;
 696 
 697         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 698         if (ei_status.dmaing)
 699         {
 700                 netdev_err(dev, "DMAing conflict in ne_block_output."
 701                            "[DMAstat:%d][irqlock:%d]\n",
 702                            ei_status.dmaing, ei_status.irqlock);
 703                 return;
 704         }
 705         ei_status.dmaing |= 0x01;
 706         /* We should already be in page 0, but to be safe... */
 707         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 708 
 709 #ifdef NE_SANITY_CHECK
 710 retry:
 711 #endif
 712 
 713 #ifdef NE8390_RW_BUGFIX
 714         /* Handle the read-before-write bug the same way as the
 715            Crynwr packet driver -- the NatSemi method doesn't work.
 716            Actually this doesn't always work either, but if you have
 717            problems with your NEx000 this is better than nothing! */
 718 
 719         outb_p(0x42, nic_base + EN0_RCNTLO);
 720         outb_p(0x00,   nic_base + EN0_RCNTHI);
 721         outb_p(0x42, nic_base + EN0_RSARLO);
 722         outb_p(0x00, nic_base + EN0_RSARHI);
 723         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 724         /* Make certain that the dummy read has occurred. */
 725         udelay(6);
 726 #endif
 727 
 728         outb_p(ENISR_RDC, nic_base + EN0_ISR);
 729 
 730         /* Now the normal output. */
 731         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 732         outb_p(count >> 8,   nic_base + EN0_RCNTHI);
 733         outb_p(0x00, nic_base + EN0_RSARLO);
 734         outb_p(start_page, nic_base + EN0_RSARHI);
 735 
 736         outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 737         if (ei_status.word16) {
 738                 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
 739         } else {
 740                 outsb(NE_BASE + NE_DATAPORT, buf, count);
 741         }
 742 
 743         dma_start = jiffies;
 744 
 745 #ifdef NE_SANITY_CHECK
 746         /* This was for the ALPHA version only, but enough people have
 747            been encountering problems so it is still here. */
 748 
 749         if (netif_msg_tx_queued(ei_local))
 750         {
 751                 /* DMA termination address check... */
 752                 int addr, tries = 20;
 753                 do {
 754                         int high = inb_p(nic_base + EN0_RSARHI);
 755                         int low = inb_p(nic_base + EN0_RSARLO);
 756                         addr = (high << 8) + low;
 757                         if ((start_page << 8) + count == addr)
 758                                 break;
 759                 } while (--tries > 0);
 760 
 761                 if (tries <= 0)
 762                 {
 763                         netdev_warn(dev, "Tx packet transfer address mismatch,"
 764                                     "%#4.4x (expected) vs. %#4.4x (actual).\n",
 765                                     (start_page << 8) + count, addr);
 766                         if (retries++ == 0)
 767                                 goto retry;
 768                 }
 769         }
 770 #endif
 771 
 772         while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
 773                 if (time_after(jiffies, dma_start + 2*HZ/100)) {                /* 20ms */
 774                         netdev_warn(dev, "timeout waiting for Tx RDC.\n");
 775                         ne_reset_8390(dev);
 776                         NS8390p_init(dev, 1);
 777                         break;
 778                 }
 779 
 780         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 781         ei_status.dmaing &= ~0x01;
 782 }
 783 
 784 static int __init ne_drv_probe(struct platform_device *pdev)
 785 {
 786         struct net_device *dev;
 787         int err, this_dev = pdev->id;
 788         struct resource *res;
 789 
 790         dev = alloc_eip_netdev();
 791         if (!dev)
 792                 return -ENOMEM;
 793 
 794         /* ne.c doesn't populate resources in platform_device, but
 795          * rbtx4927_ne_init and rbtx4938_ne_init do register devices
 796          * with resources.
 797          */
 798         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 799         if (res) {
 800                 dev->base_addr = res->start;
 801                 dev->irq = platform_get_irq(pdev, 0);
 802         } else {
 803                 if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
 804                         free_netdev(dev);
 805                         return -EINVAL;
 806                 }
 807                 dev->base_addr = io[this_dev];
 808                 dev->irq = irq[this_dev];
 809                 dev->mem_end = bad[this_dev];
 810         }
 811         SET_NETDEV_DEV(dev, &pdev->dev);
 812         err = do_ne_probe(dev);
 813         if (err) {
 814                 free_netdev(dev);
 815                 return err;
 816         }
 817         platform_set_drvdata(pdev, dev);
 818 
 819         /* Update with any values found by probing, don't update if
 820          * resources were specified.
 821          */
 822         if (!res) {
 823                 io[this_dev] = dev->base_addr;
 824                 irq[this_dev] = dev->irq;
 825         }
 826         return 0;
 827 }
 828 
 829 static int ne_drv_remove(struct platform_device *pdev)
 830 {
 831         struct net_device *dev = platform_get_drvdata(pdev);
 832 
 833         if (dev) {
 834                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
 835                 netif_device_detach(dev);
 836                 unregister_netdev(dev);
 837                 if (idev)
 838                         pnp_device_detach(idev);
 839                 /* Careful ne_drv_remove can be called twice, once from
 840                  * the platform_driver.remove and again when the
 841                  * platform_device is being removed.
 842                  */
 843                 ei_status.priv = 0;
 844                 free_irq(dev->irq, dev);
 845                 release_region(dev->base_addr, NE_IO_EXTENT);
 846                 free_netdev(dev);
 847         }
 848         return 0;
 849 }
 850 
 851 /* Remove unused devices or all if true. */
 852 static void ne_loop_rm_unreg(int all)
 853 {
 854         int this_dev;
 855         struct platform_device *pdev;
 856         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 857                 pdev = pdev_ne[this_dev];
 858                 /* No network device == unused */
 859                 if (pdev && (!platform_get_drvdata(pdev) || all)) {
 860                         ne_drv_remove(pdev);
 861                         platform_device_unregister(pdev);
 862                         pdev_ne[this_dev] = NULL;
 863                 }
 864         }
 865 }
 866 
 867 #ifdef CONFIG_PM
 868 static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
 869 {
 870         struct net_device *dev = platform_get_drvdata(pdev);
 871 
 872         if (netif_running(dev)) {
 873                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
 874                 netif_device_detach(dev);
 875                 if (idev)
 876                         pnp_stop_dev(idev);
 877         }
 878         return 0;
 879 }
 880 
 881 static int ne_drv_resume(struct platform_device *pdev)
 882 {
 883         struct net_device *dev = platform_get_drvdata(pdev);
 884 
 885         if (netif_running(dev)) {
 886                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
 887                 if (idev)
 888                         pnp_start_dev(idev);
 889                 ne_reset_8390(dev);
 890                 NS8390p_init(dev, 1);
 891                 netif_device_attach(dev);
 892         }
 893         return 0;
 894 }
 895 #else
 896 #define ne_drv_suspend NULL
 897 #define ne_drv_resume NULL
 898 #endif
 899 
 900 static struct platform_driver ne_driver = {
 901         .remove         = ne_drv_remove,
 902         .suspend        = ne_drv_suspend,
 903         .resume         = ne_drv_resume,
 904         .driver         = {
 905                 .name   = DRV_NAME,
 906         },
 907 };
 908 
 909 static void __init ne_add_devices(void)
 910 {
 911         int this_dev;
 912         struct platform_device *pdev;
 913 
 914         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 915                 if (pdev_ne[this_dev])
 916                         continue;
 917                 pdev = platform_device_register_simple(
 918                         DRV_NAME, this_dev, NULL, 0);
 919                 if (IS_ERR(pdev))
 920                         continue;
 921                 pdev_ne[this_dev] = pdev;
 922         }
 923 }
 924 
 925 #ifdef MODULE
 926 int __init init_module(void)
 927 {
 928         int retval;
 929         ne_add_devices();
 930         retval = platform_driver_probe(&ne_driver, ne_drv_probe);
 931         if (retval) {
 932                 if (io[0] == 0)
 933                         pr_notice("ne.c: You must supply \"io=0xNNN\""
 934                                " value(s) for ISA cards.\n");
 935                 ne_loop_rm_unreg(1);
 936                 return retval;
 937         }
 938 
 939         /* Unregister unused platform_devices. */
 940         ne_loop_rm_unreg(0);
 941         return retval;
 942 }
 943 #else /* MODULE */
 944 static int __init ne_init(void)
 945 {
 946         int retval = platform_driver_probe(&ne_driver, ne_drv_probe);
 947 
 948         /* Unregister unused platform_devices. */
 949         ne_loop_rm_unreg(0);
 950         return retval;
 951 }
 952 module_init(ne_init);
 953 
 954 struct net_device * __init ne_probe(int unit)
 955 {
 956         int this_dev;
 957         struct net_device *dev;
 958 
 959         /* Find an empty slot, that is no net_device and zero io port. */
 960         this_dev = 0;
 961         while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
 962                 io[this_dev]) {
 963                 if (++this_dev == MAX_NE_CARDS)
 964                         return ERR_PTR(-ENOMEM);
 965         }
 966 
 967         /* Get irq, io from kernel command line */
 968         dev = alloc_eip_netdev();
 969         if (!dev)
 970                 return ERR_PTR(-ENOMEM);
 971 
 972         sprintf(dev->name, "eth%d", unit);
 973         netdev_boot_setup_check(dev);
 974 
 975         io[this_dev] = dev->base_addr;
 976         irq[this_dev] = dev->irq;
 977         bad[this_dev] = dev->mem_end;
 978 
 979         free_netdev(dev);
 980 
 981         ne_add_devices();
 982 
 983         /* return the first device found */
 984         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 985                 if (pdev_ne[this_dev]) {
 986                         dev = platform_get_drvdata(pdev_ne[this_dev]);
 987                         if (dev)
 988                                 return dev;
 989                 }
 990         }
 991 
 992         return ERR_PTR(-ENODEV);
 993 }
 994 #endif /* MODULE */
 995 
 996 static void __exit ne_exit(void)
 997 {
 998         platform_driver_unregister(&ne_driver);
 999         ne_loop_rm_unreg(1);
1000 }
1001 module_exit(ne_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/8390/ne.c

DEFINITIONS
