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