drivers/net/usb/catc.c

   1 /*
   2  *  Copyright (c) 2001 Vojtech Pavlik
   3  *
   4  *  CATC EL1210A NetMate USB Ethernet driver
   5  *
   6  *  Sponsored by SuSE
   7  *
   8  *  Based on the work of
   9  *              Donald Becker
  10  *
  11  *  Old chipset support added by Simon Evans <spse@secret.org.uk> 2002
  12  *    - adds support for Belkin F5U011
  13  */
  14
  15 /*
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29  *
  30  * Should you need to contact me, the author, you can do so either by
  31  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  32  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  33  */
  34
  35 #include <linux/init.h>
  36 #include <linux/module.h>
  37 #include <linux/kernel.h>
  38 #include <linux/string.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/ethtool.h>
  44 #include <linux/crc32.h>
  45 #include <linux/bitops.h>
  46 #include <linux/gfp.h>
  47 #include <asm/uaccess.h>
  48
  49 #undef DEBUG
  50
  51 #include <linux/usb.h>
  52
  53 /*
  54  * Version information.
  55  */
  56
  57 #define DRIVER_VERSION "v2.8"
  58 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
  59 #define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
  60 #define SHORT_DRIVER_DESC "EL1210A NetMate USB Ethernet"
  61
  62 MODULE_AUTHOR(DRIVER_AUTHOR);
  63 MODULE_DESCRIPTION(DRIVER_DESC);
  64 MODULE_LICENSE("GPL");
  65
  66 static const char driver_name[] = "catc";
  67
  68 /*
  69  * Some defines.
  70  */
  71
  72 #define STATS_UPDATE            (HZ)    /* Time between stats updates */
  73 #define TX_TIMEOUT              (5*HZ)  /* Max time the queue can be stopped */
  74 #define PKT_SZ                  1536    /* Max Ethernet packet size */
  75 #define RX_MAX_BURST            15      /* Max packets per rx buffer (> 0, < 16) */
  76 #define TX_MAX_BURST            15      /* Max full sized packets per tx buffer (> 0) */
  77 #define CTRL_QUEUE              16      /* Max control requests in flight (power of two) */
  78 #define RX_PKT_SZ               1600    /* Max size of receive packet for F5U011 */
  79
  80 /*
  81  * Control requests.
  82  */
  83
  84 enum control_requests {
  85         ReadMem =       0xf1,
  86         GetMac =        0xf2,
  87         Reset =         0xf4,
  88         SetMac =        0xf5,
  89         SetRxMode =     0xf5,  /* F5U011 only */
  90         WriteROM =      0xf8,
  91         SetReg =        0xfa,
  92         GetReg =        0xfb,
  93         WriteMem =      0xfc,
  94         ReadROM =       0xfd,
  95 };
  96
  97 /*
  98  * Registers.
  99  */
 100
 101 enum register_offsets {
 102         TxBufCount =    0x20,
 103         RxBufCount =    0x21,
 104         OpModes =       0x22,
 105         TxQed =         0x23,
 106         RxQed =         0x24,
 107         MaxBurst =      0x25,
 108         RxUnit =        0x60,
 109         EthStatus =     0x61,
 110         StationAddr0 =  0x67,
 111         EthStats =      0x69,
 112         LEDCtrl =       0x81,
 113 };
 114
 115 enum eth_stats {
 116         TxSingleColl =  0x00,
 117         TxMultiColl =   0x02,
 118         TxExcessColl =  0x04,
 119         RxFramErr =     0x06,
 120 };
 121
 122 enum op_mode_bits {
 123         Op3MemWaits =   0x03,
 124         OpLenInclude =  0x08,
 125         OpRxMerge =     0x10,
 126         OpTxMerge =     0x20,
 127         OpWin95bugfix = 0x40,
 128         OpLoopback =    0x80,
 129 };
 130
 131 enum rx_filter_bits {
 132         RxEnable =      0x01,
 133         RxPolarity =    0x02,
 134         RxForceOK =     0x04,
 135         RxMultiCast =   0x08,
 136         RxPromisc =     0x10,
 137         AltRxPromisc =  0x20, /* F5U011 uses different bit */
 138 };
 139
 140 enum led_values {
 141         LEDFast =       0x01,
 142         LEDSlow =       0x02,
 143         LEDFlash =      0x03,
 144         LEDPulse =      0x04,
 145         LEDLink =       0x08,
 146 };
 147
 148 enum link_status {
 149         LinkNoChange = 0,
 150         LinkGood     = 1,
 151         LinkBad      = 2
 152 };
 153
 154 /*
 155  * The catc struct.
 156  */
 157
 158 #define CTRL_RUNNING    0
 159 #define RX_RUNNING      1
 160 #define TX_RUNNING      2
 161
 162 struct catc {
 163         struct net_device *netdev;
 164         struct usb_device *usbdev;
 165
 166         unsigned long flags;
 167
 168         unsigned int tx_ptr, tx_idx;
 169         unsigned int ctrl_head, ctrl_tail;
 170         spinlock_t tx_lock, ctrl_lock;
 171
 172         u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
 173         u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
 174         u8 irq_buf[2];
 175         u8 ctrl_buf[64];
 176         struct usb_ctrlrequest ctrl_dr;
 177
 178         struct timer_list timer;
 179         u8 stats_buf[8];
 180         u16 stats_vals[4];
 181         unsigned long last_stats;
 182
 183         u8 multicast[64];
 184
 185         struct ctrl_queue {
 186                 u8 dir;
 187                 u8 request;
 188                 u16 value;
 189                 u16 index;
 190                 void *buf;
 191                 int len;
 192                 void (*callback)(struct catc *catc, struct ctrl_queue *q);
 193         } ctrl_queue[CTRL_QUEUE];
 194
 195         struct urb *tx_urb, *rx_urb, *irq_urb, *ctrl_urb;
 196
 197         u8 is_f5u011;   /* Set if device is an F5U011 */
 198         u8 rxmode[2];   /* Used for F5U011 */
 199         atomic_t recq_sz; /* Used for F5U011 - counter of waiting rx packets */
 200 };
 201
 202 /*
 203  * Useful macros.
 204  */
 205
 206 #define catc_get_mac(catc, mac)                         catc_ctrl_msg(catc, USB_DIR_IN,  GetMac, 0, 0, mac,  6)
 207 #define catc_reset(catc)                                catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
 208 #define catc_set_reg(catc, reg, val)                    catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
 209 #define catc_get_reg(catc, reg, buf)                    catc_ctrl_msg(catc, USB_DIR_IN,  GetReg, 0, reg, buf, 1)
 210 #define catc_write_mem(catc, addr, buf, size)           catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
 211 #define catc_read_mem(catc, addr, buf, size)            catc_ctrl_msg(catc, USB_DIR_IN,  ReadMem, 0, addr, buf, size)
 212
 213 #define f5u011_rxmode(catc, rxmode)                     catc_ctrl_msg(catc, USB_DIR_OUT, SetRxMode, 0, 1, rxmode, 2)
 214 #define f5u011_rxmode_async(catc, rxmode)               catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 1, &rxmode, 2, NULL)
 215 #define f5u011_mchash_async(catc, hash)                 catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 2, &hash, 8, NULL)
 216
 217 #define catc_set_reg_async(catc, reg, val)              catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
 218 #define catc_get_reg_async(catc, reg, cb)               catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
 219 #define catc_write_mem_async(catc, addr, buf, size)     catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)
 220
 221 /*
 222  * Receive routines.
 223  */
 224
 225 static void catc_rx_done(struct urb *urb)
 226 {
 227         struct catc *catc = urb->context;
 228         u8 *pkt_start = urb->transfer_buffer;
 229         struct sk_buff *skb;
 230         int pkt_len, pkt_offset = 0;
 231         int status = urb->status;
 232
 233         if (!catc->is_f5u011) {
 234                 clear_bit(RX_RUNNING, &catc->flags);
 235                 pkt_offset = 2;
 236         }
 237
 238         if (status) {
 239                 dev_dbg(&urb->dev->dev, "rx_done, status %d, length %d\n",
 240                         status, urb->actual_length);
 241                 return;
 242         }
 243
 244         do {
 245                 if(!catc->is_f5u011) {
 246                         pkt_len = le16_to_cpup((__le16*)pkt_start);
 247                         if (pkt_len > urb->actual_length) {
 248                                 catc->netdev->stats.rx_length_errors++;
 249                                 catc->netdev->stats.rx_errors++;
 250                                 break;
 251                         }
 252                 } else {
 253                         pkt_len = urb->actual_length;
 254                 }
 255
 256                 if (!(skb = dev_alloc_skb(pkt_len)))
 257                         return;
 258
 259                 skb_copy_to_linear_data(skb, pkt_start + pkt_offset, pkt_len);
 260                 skb_put(skb, pkt_len);
 261
 262                 skb->protocol = eth_type_trans(skb, catc->netdev);
 263                 netif_rx(skb);
 264
 265                 catc->netdev->stats.rx_packets++;
 266                 catc->netdev->stats.rx_bytes += pkt_len;
 267
 268                 /* F5U011 only does one packet per RX */
 269                 if (catc->is_f5u011)
 270                         break;
 271                 pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;
 272
 273         } while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);
 274
 275         if (catc->is_f5u011) {
 276                 if (atomic_read(&catc->recq_sz)) {
 277                         int state;
 278                         atomic_dec(&catc->recq_sz);
 279                         netdev_dbg(catc->netdev, "getting extra packet\n");
 280                         urb->dev = catc->usbdev;
 281                         if ((state = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 282                                 netdev_dbg(catc->netdev,
 283                                            "submit(rx_urb) status %d\n", state);
 284                         }
 285                 } else {
 286                         clear_bit(RX_RUNNING, &catc->flags);
 287                 }
 288         }
 289 }
 290
 291 static void catc_irq_done(struct urb *urb)
 292 {
 293         struct catc *catc = urb->context;
 294         u8 *data = urb->transfer_buffer;
 295         int status = urb->status;
 296         unsigned int hasdata = 0, linksts = LinkNoChange;
 297         int res;
 298
 299         if (!catc->is_f5u011) {
 300                 hasdata = data[1] & 0x80;
 301                 if (data[1] & 0x40)
 302                         linksts = LinkGood;
 303                 else if (data[1] & 0x20)
 304                         linksts = LinkBad;
 305         } else {
 306                 hasdata = (unsigned int)(be16_to_cpup((__be16*)data) & 0x0fff);
 307                 if (data[0] == 0x90)
 308                         linksts = LinkGood;
 309                 else if (data[0] == 0xA0)
 310                         linksts = LinkBad;
 311         }
 312
 313         switch (status) {
 314         case 0:                 /* success */
 315                 break;
 316         case -ECONNRESET:       /* unlink */
 317         case -ENOENT:
 318         case -ESHUTDOWN:
 319                 return;
 320         /* -EPIPE:  should clear the halt */
 321         default:                /* error */
 322                 dev_dbg(&urb->dev->dev,
 323                         "irq_done, status %d, data %02x %02x.\n",
 324                         status, data[0], data[1]);
 325                 goto resubmit;
 326         }
 327
 328         if (linksts == LinkGood) {
 329                 netif_carrier_on(catc->netdev);
 330                 netdev_dbg(catc->netdev, "link ok\n");
 331         }
 332
 333         if (linksts == LinkBad) {
 334                 netif_carrier_off(catc->netdev);
 335                 netdev_dbg(catc->netdev, "link bad\n");
 336         }
 337
 338         if (hasdata) {
 339                 if (test_and_set_bit(RX_RUNNING, &catc->flags)) {
 340                         if (catc->is_f5u011)
 341                                 atomic_inc(&catc->recq_sz);
 342                 } else {
 343                         catc->rx_urb->dev = catc->usbdev;
 344                         if ((res = usb_submit_urb(catc->rx_urb, GFP_ATOMIC)) < 0) {
 345                                 dev_err(&catc->usbdev->dev,
 346                                         "submit(rx_urb) status %d\n", res);
 347                         }
 348                 }
 349         }
 350 resubmit:
 351         res = usb_submit_urb (urb, GFP_ATOMIC);
 352         if (res)
 353                 dev_err(&catc->usbdev->dev,
 354                         "can't resubmit intr, %s-%s, status %d\n",
 355                         catc->usbdev->bus->bus_name,
 356                         catc->usbdev->devpath, res);
 357 }
 358
 359 /*
 360  * Transmit routines.
 361  */
 362
 363 static int catc_tx_run(struct catc *catc)
 364 {
 365         int status;
 366
 367         if (catc->is_f5u011)
 368                 catc->tx_ptr = (catc->tx_ptr + 63) & ~63;
 369
 370         catc->tx_urb->transfer_buffer_length = catc->tx_ptr;
 371         catc->tx_urb->transfer_buffer = catc->tx_buf[catc->tx_idx];
 372         catc->tx_urb->dev = catc->usbdev;
 373
 374         if ((status = usb_submit_urb(catc->tx_urb, GFP_ATOMIC)) < 0)
 375                 dev_err(&catc->usbdev->dev, "submit(tx_urb), status %d\n",
 376                         status);
 377
 378         catc->tx_idx = !catc->tx_idx;
 379         catc->tx_ptr = 0;
 380
 381         catc->netdev->trans_start = jiffies;
 382         return status;
 383 }
 384
 385 static void catc_tx_done(struct urb *urb)
 386 {
 387         struct catc *catc = urb->context;
 388         unsigned long flags;
 389         int r, status = urb->status;
 390
 391         if (status == -ECONNRESET) {
 392                 dev_dbg(&urb->dev->dev, "Tx Reset.\n");
 393                 urb->status = 0;
 394                 catc->netdev->trans_start = jiffies;
 395                 catc->netdev->stats.tx_errors++;
 396                 clear_bit(TX_RUNNING, &catc->flags);
 397                 netif_wake_queue(catc->netdev);
 398                 return;
 399         }
 400
 401         if (status) {
 402                 dev_dbg(&urb->dev->dev, "tx_done, status %d, length %d\n",
 403                         status, urb->actual_length);
 404                 return;
 405         }
 406
 407         spin_lock_irqsave(&catc->tx_lock, flags);
 408
 409         if (catc->tx_ptr) {
 410                 r = catc_tx_run(catc);
 411                 if (unlikely(r < 0))
 412                         clear_bit(TX_RUNNING, &catc->flags);
 413         } else {
 414                 clear_bit(TX_RUNNING, &catc->flags);
 415         }
 416
 417         netif_wake_queue(catc->netdev);
 418
 419         spin_unlock_irqrestore(&catc->tx_lock, flags);
 420 }
 421
 422 static netdev_tx_t catc_start_xmit(struct sk_buff *skb,
 423                                          struct net_device *netdev)
 424 {
 425         struct catc *catc = netdev_priv(netdev);
 426         unsigned long flags;
 427         int r = 0;
 428         char *tx_buf;
 429
 430         spin_lock_irqsave(&catc->tx_lock, flags);
 431
 432         catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
 433         tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
 434         if (catc->is_f5u011)
 435                 *(__be16 *)tx_buf = cpu_to_be16(skb->len);
 436         else
 437                 *(__le16 *)tx_buf = cpu_to_le16(skb->len);
 438         skb_copy_from_linear_data(skb, tx_buf + 2, skb->len);
 439         catc->tx_ptr += skb->len + 2;
 440
 441         if (!test_and_set_bit(TX_RUNNING, &catc->flags)) {
 442                 r = catc_tx_run(catc);
 443                 if (r < 0)
 444                         clear_bit(TX_RUNNING, &catc->flags);
 445         }
 446
 447         if ((catc->is_f5u011 && catc->tx_ptr) ||
 448             (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2))))
 449                 netif_stop_queue(netdev);
 450
 451         spin_unlock_irqrestore(&catc->tx_lock, flags);
 452
 453         if (r >= 0) {
 454                 catc->netdev->stats.tx_bytes += skb->len;
 455                 catc->netdev->stats.tx_packets++;
 456         }
 457
 458         dev_kfree_skb(skb);
 459
 460         return NETDEV_TX_OK;
 461 }
 462
 463 static void catc_tx_timeout(struct net_device *netdev)
 464 {
 465         struct catc *catc = netdev_priv(netdev);
 466
 467         dev_warn(&netdev->dev, "Transmit timed out.\n");
 468         usb_unlink_urb(catc->tx_urb);
 469 }
 470
 471 /*
 472  * Control messages.
 473  */
 474
 475 static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
 476 {
 477         int retval = usb_control_msg(catc->usbdev,
 478                 dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
 479                  request, 0x40 | dir, value, index, buf, len, 1000);
 480         return retval < 0 ? retval : 0;
 481 }
 482
 483 static void catc_ctrl_run(struct catc *catc)
 484 {
 485         struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
 486         struct usb_device *usbdev = catc->usbdev;
 487         struct urb *urb = catc->ctrl_urb;
 488         struct usb_ctrlrequest *dr = &catc->ctrl_dr;
 489         int status;
 490
 491         dr->bRequest = q->request;
 492         dr->bRequestType = 0x40 | q->dir;
 493         dr->wValue = cpu_to_le16(q->value);
 494         dr->wIndex = cpu_to_le16(q->index);
 495         dr->wLength = cpu_to_le16(q->len);
 496
 497         urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
 498         urb->transfer_buffer_length = q->len;
 499         urb->transfer_buffer = catc->ctrl_buf;
 500         urb->setup_packet = (void *) dr;
 501         urb->dev = usbdev;
 502
 503         if (!q->dir && q->buf && q->len)
 504                 memcpy(catc->ctrl_buf, q->buf, q->len);
 505
 506         if ((status = usb_submit_urb(catc->ctrl_urb, GFP_ATOMIC)))
 507                 dev_err(&catc->usbdev->dev, "submit(ctrl_urb) status %d\n",
 508                         status);
 509 }
 510
 511 static void catc_ctrl_done(struct urb *urb)
 512 {
 513         struct catc *catc = urb->context;
 514         struct ctrl_queue *q;
 515         unsigned long flags;
 516         int status = urb->status;
 517
 518         if (status)
 519                 dev_dbg(&urb->dev->dev, "ctrl_done, status %d, len %d.\n",
 520                         status, urb->actual_length);
 521
 522         spin_lock_irqsave(&catc->ctrl_lock, flags);
 523
 524         q = catc->ctrl_queue + catc->ctrl_tail;
 525
 526         if (q->dir) {
 527                 if (q->buf && q->len)
 528                         memcpy(q->buf, catc->ctrl_buf, q->len);
 529                 else
 530                         q->buf = catc->ctrl_buf;
 531         }
 532
 533         if (q->callback)
 534                 q->callback(catc, q);
 535
 536         catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
 537
 538         if (catc->ctrl_head != catc->ctrl_tail)
 539                 catc_ctrl_run(catc);
 540         else
 541                 clear_bit(CTRL_RUNNING, &catc->flags);
 542
 543         spin_unlock_irqrestore(&catc->ctrl_lock, flags);
 544 }
 545
 546 static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
 547         u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
 548 {
 549         struct ctrl_queue *q;
 550         int retval = 0;
 551         unsigned long flags;
 552
 553         spin_lock_irqsave(&catc->ctrl_lock, flags);
 554
 555         q = catc->ctrl_queue + catc->ctrl_head;
 556
 557         q->dir = dir;
 558         q->request = request;
 559         q->value = value;
 560         q->index = index;
 561         q->buf = buf;
 562         q->len = len;
 563         q->callback = callback;
 564
 565         catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);
 566
 567         if (catc->ctrl_head == catc->ctrl_tail) {
 568                 dev_err(&catc->usbdev->dev, "ctrl queue full\n");
 569                 catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
 570                 retval = -1;
 571         }
 572
 573         if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
 574                 catc_ctrl_run(catc);
 575
 576         spin_unlock_irqrestore(&catc->ctrl_lock, flags);
 577
 578         return retval;
 579 }
 580
 581 /*
 582  * Statistics.
 583  */
 584
 585 static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
 586 {
 587         int index = q->index - EthStats;
 588         u16 data, last;
 589
 590         catc->stats_buf[index] = *((char *)q->buf);
 591
 592         if (index & 1)
 593                 return;
 594
 595         data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
 596         last = catc->stats_vals[index >> 1];
 597
 598         switch (index) {
 599                 case TxSingleColl:
 600                 case TxMultiColl:
 601                         catc->netdev->stats.collisions += data - last;
 602                         break;
 603                 case TxExcessColl:
 604                         catc->netdev->stats.tx_aborted_errors += data - last;
 605                         catc->netdev->stats.tx_errors += data - last;
 606                         break;
 607                 case RxFramErr:
 608                         catc->netdev->stats.rx_frame_errors += data - last;
 609                         catc->netdev->stats.rx_errors += data - last;
 610                         break;
 611         }
 612
 613         catc->stats_vals[index >> 1] = data;
 614 }
 615
 616 static void catc_stats_timer(unsigned long data)
 617 {
 618         struct catc *catc = (void *) data;
 619         int i;
 620
 621         for (i = 0; i < 8; i++)
 622                 catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);
 623
 624         mod_timer(&catc->timer, jiffies + STATS_UPDATE);
 625 }
 626
 627 /*
 628  * Receive modes. Broadcast, Multicast, Promisc.
 629  */
 630
 631 static void catc_multicast(unsigned char *addr, u8 *multicast)
 632 {
 633         u32 crc;
 634
 635         crc = ether_crc_le(6, addr);
 636         multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
 637 }
 638
 639 static void catc_set_multicast_list(struct net_device *netdev)
 640 {
 641         struct catc *catc = netdev_priv(netdev);
 642         struct netdev_hw_addr *ha;
 643         u8 broadcast[ETH_ALEN];
 644         u8 rx = RxEnable | RxPolarity | RxMultiCast;
 645
 646         memset(broadcast, 0xff, ETH_ALEN);
 647         memset(catc->multicast, 0, 64);
 648
 649         catc_multicast(broadcast, catc->multicast);
 650         catc_multicast(netdev->dev_addr, catc->multicast);
 651
 652         if (netdev->flags & IFF_PROMISC) {
 653                 memset(catc->multicast, 0xff, 64);
 654                 rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
 655         }
 656
 657         if (netdev->flags & IFF_ALLMULTI) {
 658                 memset(catc->multicast, 0xff, 64);
 659         } else {
 660                 netdev_for_each_mc_addr(ha, netdev) {
 661                         u32 crc = ether_crc_le(6, ha->addr);
 662                         if (!catc->is_f5u011) {
 663                                 catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
 664                         } else {
 665                                 catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
 666                         }
 667                 }
 668         }
 669         if (!catc->is_f5u011) {
 670                 catc_set_reg_async(catc, RxUnit, rx);
 671                 catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
 672         } else {
 673                 f5u011_mchash_async(catc, catc->multicast);
 674                 if (catc->rxmode[0] != rx) {
 675                         catc->rxmode[0] = rx;
 676                         netdev_dbg(catc->netdev,
 677                                    "Setting RX mode to %2.2X %2.2X\n",
 678                                    catc->rxmode[0], catc->rxmode[1]);
 679                         f5u011_rxmode_async(catc, catc->rxmode);
 680                 }
 681         }
 682 }
 683
 684 static void catc_get_drvinfo(struct net_device *dev,
 685                              struct ethtool_drvinfo *info)
 686 {
 687         struct catc *catc = netdev_priv(dev);
 688         strlcpy(info->driver, driver_name, sizeof(info->driver));
 689         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 690         usb_make_path(catc->usbdev, info->bus_info, sizeof(info->bus_info));
 691 }
 692
 693 static int catc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 694 {
 695         struct catc *catc = netdev_priv(dev);
 696         if (!catc->is_f5u011)
 697                 return -EOPNOTSUPP;
 698
 699         cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_TP;
 700         cmd->advertising = ADVERTISED_10baseT_Half | ADVERTISED_TP;
 701         ethtool_cmd_speed_set(cmd, SPEED_10);
 702         cmd->duplex = DUPLEX_HALF;
 703         cmd->port = PORT_TP;
 704         cmd->phy_address = 0;
 705         cmd->transceiver = XCVR_INTERNAL;
 706         cmd->autoneg = AUTONEG_DISABLE;
 707         cmd->maxtxpkt = 1;
 708         cmd->maxrxpkt = 1;
 709         return 0;
 710 }
 711
 712 static const struct ethtool_ops ops = {
 713         .get_drvinfo = catc_get_drvinfo,
 714         .get_settings = catc_get_settings,
 715         .get_link = ethtool_op_get_link
 716 };
 717
 718 /*
 719  * Open, close.
 720  */
 721
 722 static int catc_open(struct net_device *netdev)
 723 {
 724         struct catc *catc = netdev_priv(netdev);
 725         int status;
 726
 727         catc->irq_urb->dev = catc->usbdev;
 728         if ((status = usb_submit_urb(catc->irq_urb, GFP_KERNEL)) < 0) {
 729                 dev_err(&catc->usbdev->dev, "submit(irq_urb) status %d\n",
 730                         status);
 731                 return -1;
 732         }
 733
 734         netif_start_queue(netdev);
 735
 736         if (!catc->is_f5u011)
 737                 mod_timer(&catc->timer, jiffies + STATS_UPDATE);
 738
 739         return 0;
 740 }
 741
 742 static int catc_stop(struct net_device *netdev)
 743 {
 744         struct catc *catc = netdev_priv(netdev);
 745
 746         netif_stop_queue(netdev);
 747
 748         if (!catc->is_f5u011)
 749                 del_timer_sync(&catc->timer);
 750
 751         usb_kill_urb(catc->rx_urb);
 752         usb_kill_urb(catc->tx_urb);
 753         usb_kill_urb(catc->irq_urb);
 754         usb_kill_urb(catc->ctrl_urb);
 755
 756         return 0;
 757 }
 758
 759 static const struct net_device_ops catc_netdev_ops = {
 760         .ndo_open               = catc_open,
 761         .ndo_stop               = catc_stop,
 762         .ndo_start_xmit         = catc_start_xmit,
 763
 764         .ndo_tx_timeout         = catc_tx_timeout,
 765         .ndo_set_rx_mode        = catc_set_multicast_list,
 766         .ndo_change_mtu         = eth_change_mtu,
 767         .ndo_set_mac_address    = eth_mac_addr,
 768         .ndo_validate_addr      = eth_validate_addr,
 769 };
 770
 771 /*
 772  * USB probe, disconnect.
 773  */
 774
 775 static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id)
 776 {
 777         struct device *dev = &intf->dev;
 778         struct usb_device *usbdev = interface_to_usbdev(intf);
 779         struct net_device *netdev;
 780         struct catc *catc;
 781         u8 broadcast[ETH_ALEN];
 782         int i, pktsz;
 783
 784         if (usb_set_interface(usbdev,
 785                         intf->altsetting->desc.bInterfaceNumber, 1)) {
 786                 dev_err(dev, "Can't set altsetting 1.\n");
 787                 return -EIO;
 788         }
 789
 790         netdev = alloc_etherdev(sizeof(struct catc));
 791         if (!netdev)
 792                 return -ENOMEM;
 793
 794         catc = netdev_priv(netdev);
 795
 796         netdev->netdev_ops = &catc_netdev_ops;
 797         netdev->watchdog_timeo = TX_TIMEOUT;
 798         SET_ETHTOOL_OPS(netdev, &ops);
 799
 800         catc->usbdev = usbdev;
 801         catc->netdev = netdev;
 802
 803         spin_lock_init(&catc->tx_lock);
 804         spin_lock_init(&catc->ctrl_lock);
 805
 806         init_timer(&catc->timer);
 807         catc->timer.data = (long) catc;
 808         catc->timer.function = catc_stats_timer;
 809
 810         catc->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 811         catc->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 812         catc->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 813         catc->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
 814         if ((!catc->ctrl_urb) || (!catc->tx_urb) ||
 815             (!catc->rx_urb) || (!catc->irq_urb)) {
 816                 dev_err(&intf->dev, "No free urbs available.\n");
 817                 usb_free_urb(catc->ctrl_urb);
 818                 usb_free_urb(catc->tx_urb);
 819                 usb_free_urb(catc->rx_urb);
 820                 usb_free_urb(catc->irq_urb);
 821                 free_netdev(netdev);
 822                 return -ENOMEM;
 823         }
 824
 825         /* The F5U011 has the same vendor/product as the netmate but a device version of 0x130 */
 826         if (le16_to_cpu(usbdev->descriptor.idVendor) == 0x0423 &&
 827             le16_to_cpu(usbdev->descriptor.idProduct) == 0xa &&
 828             le16_to_cpu(catc->usbdev->descriptor.bcdDevice) == 0x0130) {
 829                 dev_dbg(dev, "Testing for f5u011\n");
 830                 catc->is_f5u011 = 1;
 831                 atomic_set(&catc->recq_sz, 0);
 832                 pktsz = RX_PKT_SZ;
 833         } else {
 834                 pktsz = RX_MAX_BURST * (PKT_SZ + 2);
 835         }
 836
 837         usb_fill_control_urb(catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
 838                 NULL, NULL, 0, catc_ctrl_done, catc);
 839
 840         usb_fill_bulk_urb(catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
 841                 NULL, 0, catc_tx_done, catc);
 842
 843         usb_fill_bulk_urb(catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
 844                 catc->rx_buf, pktsz, catc_rx_done, catc);
 845
 846         usb_fill_int_urb(catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
 847                 catc->irq_buf, 2, catc_irq_done, catc, 1);
 848
 849         if (!catc->is_f5u011) {
 850                 dev_dbg(dev, "Checking memory size\n");
 851
 852                 i = 0x12345678;
 853                 catc_write_mem(catc, 0x7a80, &i, 4);
 854                 i = 0x87654321;
 855                 catc_write_mem(catc, 0xfa80, &i, 4);
 856                 catc_read_mem(catc, 0x7a80, &i, 4);
 857
 858                 switch (i) {
 859                 case 0x12345678:
 860                         catc_set_reg(catc, TxBufCount, 8);
 861                         catc_set_reg(catc, RxBufCount, 32);
 862                         dev_dbg(dev, "64k Memory\n");
 863                         break;
 864                 default:
 865                         dev_warn(&intf->dev,
 866                                  "Couldn't detect memory size, assuming 32k\n");
 867                 case 0x87654321:
 868                         catc_set_reg(catc, TxBufCount, 4);
 869                         catc_set_reg(catc, RxBufCount, 16);
 870                         dev_dbg(dev, "32k Memory\n");
 871                         break;
 872                 }
 873
 874                 dev_dbg(dev, "Getting MAC from SEEROM.\n");
 875
 876                 catc_get_mac(catc, netdev->dev_addr);
 877
 878                 dev_dbg(dev, "Setting MAC into registers.\n");
 879
 880                 for (i = 0; i < 6; i++)
 881                         catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
 882
 883                 dev_dbg(dev, "Filling the multicast list.\n");
 884
 885                 memset(broadcast, 0xff, ETH_ALEN);
 886                 catc_multicast(broadcast, catc->multicast);
 887                 catc_multicast(netdev->dev_addr, catc->multicast);
 888                 catc_write_mem(catc, 0xfa80, catc->multicast, 64);
 889
 890                 dev_dbg(dev, "Clearing error counters.\n");
 891
 892                 for (i = 0; i < 8; i++)
 893                         catc_set_reg(catc, EthStats + i, 0);
 894                 catc->last_stats = jiffies;
 895
 896                 dev_dbg(dev, "Enabling.\n");
 897
 898                 catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
 899                 catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
 900                 catc_set_reg(catc, LEDCtrl, LEDLink);
 901                 catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
 902         } else {
 903                 dev_dbg(dev, "Performing reset\n");
 904                 catc_reset(catc);
 905                 catc_get_mac(catc, netdev->dev_addr);
 906
 907                 dev_dbg(dev, "Setting RX Mode\n");
 908                 catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
 909                 catc->rxmode[1] = 0;
 910                 f5u011_rxmode(catc, catc->rxmode);
 911         }
 912         dev_dbg(dev, "Init done.\n");
 913         printk(KERN_INFO "%s: %s USB Ethernet at usb-%s-%s, %pM.\n",
 914                netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
 915                usbdev->bus->bus_name, usbdev->devpath, netdev->dev_addr);
 916         usb_set_intfdata(intf, catc);
 917
 918         SET_NETDEV_DEV(netdev, &intf->dev);
 919         if (register_netdev(netdev) != 0) {
 920                 usb_set_intfdata(intf, NULL);
 921                 usb_free_urb(catc->ctrl_urb);
 922                 usb_free_urb(catc->tx_urb);
 923                 usb_free_urb(catc->rx_urb);
 924                 usb_free_urb(catc->irq_urb);
 925                 free_netdev(netdev);
 926                 return -EIO;
 927         }
 928         return 0;
 929 }
 930
 931 static void catc_disconnect(struct usb_interface *intf)
 932 {
 933         struct catc *catc = usb_get_intfdata(intf);
 934
 935         usb_set_intfdata(intf, NULL);
 936         if (catc) {
 937                 unregister_netdev(catc->netdev);
 938                 usb_free_urb(catc->ctrl_urb);
 939                 usb_free_urb(catc->tx_urb);
 940                 usb_free_urb(catc->rx_urb);
 941                 usb_free_urb(catc->irq_urb);
 942                 free_netdev(catc->netdev);
 943         }
 944 }
 945
 946 /*
 947  * Module functions and tables.
 948  */
 949
 950 static struct usb_device_id catc_id_table [] = {
 951         { USB_DEVICE(0x0423, 0xa) },    /* CATC Netmate, Belkin F5U011 */
 952         { USB_DEVICE(0x0423, 0xc) },    /* CATC Netmate II, Belkin F5U111 */
 953         { USB_DEVICE(0x08d1, 0x1) },    /* smartBridges smartNIC */
 954         { }
 955 };
 956
 957 MODULE_DEVICE_TABLE(usb, catc_id_table);
 958
 959 static struct usb_driver catc_driver = {
 960         .name =         driver_name,
 961         .probe =        catc_probe,
 962         .disconnect =   catc_disconnect,
 963         .id_table =     catc_id_table,
 964         .disable_hub_initiated_lpm = 1,
 965 };
 966
 967 module_usb_driver(catc_driver);