drivers/net/ethernet/moxa/moxart_ether.c

   1 /* MOXA ART Ethernet (RTL8201CP) driver.
   2  *
   3  * Copyright (C) 2013 Jonas Jensen
   4  *
   5  * Jonas Jensen <jonas.jensen@gmail.com>
   6  *
   7  * Based on code from
   8  * Moxa Technology Co., Ltd. <www.moxa.com>
   9  *
  10  * This file is licensed under the terms of the GNU General Public
  11  * License version 2.  This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/ethtool.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/irq.h>
  24 #include <linux/of_address.h>
  25 #include <linux/of_irq.h>
  26 #include <linux/crc32.h>
  27 #include <linux/crc32c.h>
  28
  29 #include "moxart_ether.h"
  30
  31 static inline void moxart_desc_write(u32 data, u32 *desc)
  32 {
  33         *desc = cpu_to_le32(data);
  34 }
  35
  36 static inline u32 moxart_desc_read(u32 *desc)
  37 {
  38         return le32_to_cpu(*desc);
  39 }
  40
  41 static inline void moxart_emac_write(struct net_device *ndev,
  42                                      unsigned int reg, unsigned long value)
  43 {
  44         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  45
  46         writel(value, priv->base + reg);
  47 }
  48
  49 static void moxart_update_mac_address(struct net_device *ndev)
  50 {
  51         moxart_emac_write(ndev, REG_MAC_MS_ADDRESS,
  52                           ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1])));
  53         moxart_emac_write(ndev, REG_MAC_MS_ADDRESS + 4,
  54                           ((ndev->dev_addr[2] << 24) |
  55                            (ndev->dev_addr[3] << 16) |
  56                            (ndev->dev_addr[4] << 8) |
  57                            (ndev->dev_addr[5])));
  58 }
  59
  60 static int moxart_set_mac_address(struct net_device *ndev, void *addr)
  61 {
  62         struct sockaddr *address = addr;
  63
  64         if (!is_valid_ether_addr(address->sa_data))
  65                 return -EADDRNOTAVAIL;
  66
  67         memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len);
  68         moxart_update_mac_address(ndev);
  69
  70         return 0;
  71 }
  72
  73 static void moxart_mac_free_memory(struct net_device *ndev)
  74 {
  75         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  76         int i;
  77
  78         for (i = 0; i < RX_DESC_NUM; i++)
  79                 dma_unmap_single(&ndev->dev, priv->rx_mapping[i],
  80                                  priv->rx_buf_size, DMA_FROM_DEVICE);
  81
  82         if (priv->tx_desc_base)
  83                 dma_free_coherent(NULL, TX_REG_DESC_SIZE * TX_DESC_NUM,
  84                                   priv->tx_desc_base, priv->tx_base);
  85
  86         if (priv->rx_desc_base)
  87                 dma_free_coherent(NULL, RX_REG_DESC_SIZE * RX_DESC_NUM,
  88                                   priv->rx_desc_base, priv->rx_base);
  89
  90         kfree(priv->tx_buf_base);
  91         kfree(priv->rx_buf_base);
  92 }
  93
  94 static void moxart_mac_reset(struct net_device *ndev)
  95 {
  96         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  97
  98         writel(SW_RST, priv->base + REG_MAC_CTRL);
  99         while (readl(priv->base + REG_MAC_CTRL) & SW_RST)
 100                 mdelay(10);
 101
 102         writel(0, priv->base + REG_INTERRUPT_MASK);
 103
 104         priv->reg_maccr = RX_BROADPKT | FULLDUP | CRC_APD | RX_FTL;
 105 }
 106
 107 static void moxart_mac_enable(struct net_device *ndev)
 108 {
 109         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 110
 111         writel(0x00001010, priv->base + REG_INT_TIMER_CTRL);
 112         writel(0x00000001, priv->base + REG_APOLL_TIMER_CTRL);
 113         writel(0x00000390, priv->base + REG_DMA_BLEN_CTRL);
 114
 115         priv->reg_imr |= (RPKT_FINISH_M | XPKT_FINISH_M);
 116         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 117
 118         priv->reg_maccr |= (RCV_EN | XMT_EN | RDMA_EN | XDMA_EN);
 119         writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
 120 }
 121
 122 static void moxart_mac_setup_desc_ring(struct net_device *ndev)
 123 {
 124         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 125         void *desc;
 126         int i;
 127
 128         for (i = 0; i < TX_DESC_NUM; i++) {
 129                 desc = priv->tx_desc_base + i * TX_REG_DESC_SIZE;
 130                 memset(desc, 0, TX_REG_DESC_SIZE);
 131
 132                 priv->tx_buf[i] = priv->tx_buf_base + priv->tx_buf_size * i;
 133         }
 134         moxart_desc_write(TX_DESC1_END, desc + TX_REG_OFFSET_DESC1);
 135
 136         priv->tx_head = 0;
 137         priv->tx_tail = 0;
 138
 139         for (i = 0; i < RX_DESC_NUM; i++) {
 140                 desc = priv->rx_desc_base + i * RX_REG_DESC_SIZE;
 141                 memset(desc, 0, RX_REG_DESC_SIZE);
 142                 moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
 143                 moxart_desc_write(RX_BUF_SIZE & RX_DESC1_BUF_SIZE_MASK,
 144                        desc + RX_REG_OFFSET_DESC1);
 145
 146                 priv->rx_buf[i] = priv->rx_buf_base + priv->rx_buf_size * i;
 147                 priv->rx_mapping[i] = dma_map_single(&ndev->dev,
 148                                                      priv->rx_buf[i],
 149                                                      priv->rx_buf_size,
 150                                                      DMA_FROM_DEVICE);
 151                 if (dma_mapping_error(&ndev->dev, priv->rx_mapping[i]))
 152                         netdev_err(ndev, "DMA mapping error\n");
 153
 154                 moxart_desc_write(priv->rx_mapping[i],
 155                        desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_PHYS);
 156                 moxart_desc_write((uintptr_t)priv->rx_buf[i],
 157                        desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_VIRT);
 158         }
 159         moxart_desc_write(RX_DESC1_END, desc + RX_REG_OFFSET_DESC1);
 160
 161         priv->rx_head = 0;
 162
 163         /* reset the MAC controller TX/RX desciptor base address */
 164         writel(priv->tx_base, priv->base + REG_TXR_BASE_ADDRESS);
 165         writel(priv->rx_base, priv->base + REG_RXR_BASE_ADDRESS);
 166 }
 167
 168 static int moxart_mac_open(struct net_device *ndev)
 169 {
 170         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 171
 172         if (!is_valid_ether_addr(ndev->dev_addr))
 173                 return -EADDRNOTAVAIL;
 174
 175         napi_enable(&priv->napi);
 176
 177         moxart_mac_reset(ndev);
 178         moxart_update_mac_address(ndev);
 179         moxart_mac_setup_desc_ring(ndev);
 180         moxart_mac_enable(ndev);
 181         netif_start_queue(ndev);
 182
 183         netdev_dbg(ndev, "%s: IMR=0x%x, MACCR=0x%x\n",
 184                    __func__, readl(priv->base + REG_INTERRUPT_MASK),
 185                    readl(priv->base + REG_MAC_CTRL));
 186
 187         return 0;
 188 }
 189
 190 static int moxart_mac_stop(struct net_device *ndev)
 191 {
 192         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 193
 194         napi_disable(&priv->napi);
 195
 196         netif_stop_queue(ndev);
 197
 198         /* disable all interrupts */
 199         writel(0, priv->base + REG_INTERRUPT_MASK);
 200
 201         /* disable all functions */
 202         writel(0, priv->base + REG_MAC_CTRL);
 203
 204         return 0;
 205 }
 206
 207 static int moxart_rx_poll(struct napi_struct *napi, int budget)
 208 {
 209         struct moxart_mac_priv_t *priv = container_of(napi,
 210                                                       struct moxart_mac_priv_t,
 211                                                       napi);
 212         struct net_device *ndev = priv->ndev;
 213         struct sk_buff *skb;
 214         void *desc;
 215         unsigned int desc0, len;
 216         int rx_head = priv->rx_head;
 217         int rx = 0;
 218
 219         while (rx < budget) {
 220                 desc = priv->rx_desc_base + (RX_REG_DESC_SIZE * rx_head);
 221                 desc0 = moxart_desc_read(desc + RX_REG_OFFSET_DESC0);
 222                 rmb(); /* ensure desc0 is up to date */
 223
 224                 if (desc0 & RX_DESC0_DMA_OWN)
 225                         break;
 226
 227                 if (desc0 & (RX_DESC0_ERR | RX_DESC0_CRC_ERR | RX_DESC0_FTL |
 228                              RX_DESC0_RUNT | RX_DESC0_ODD_NB)) {
 229                         net_dbg_ratelimited("packet error\n");
 230                         priv->stats.rx_dropped++;
 231                         priv->stats.rx_errors++;
 232                         goto rx_next;
 233                 }
 234
 235                 len = desc0 & RX_DESC0_FRAME_LEN_MASK;
 236
 237                 if (len > RX_BUF_SIZE)
 238                         len = RX_BUF_SIZE;
 239
 240                 dma_sync_single_for_cpu(&ndev->dev,
 241                                         priv->rx_mapping[rx_head],
 242                                         priv->rx_buf_size, DMA_FROM_DEVICE);
 243                 skb = netdev_alloc_skb_ip_align(ndev, len);
 244
 245                 if (unlikely(!skb)) {
 246                         net_dbg_ratelimited("netdev_alloc_skb_ip_align failed\n");
 247                         priv->stats.rx_dropped++;
 248                         priv->stats.rx_errors++;
 249                         goto rx_next;
 250                 }
 251
 252                 memcpy(skb->data, priv->rx_buf[rx_head], len);
 253                 skb_put(skb, len);
 254                 skb->protocol = eth_type_trans(skb, ndev);
 255                 napi_gro_receive(&priv->napi, skb);
 256                 rx++;
 257
 258                 priv->stats.rx_packets++;
 259                 priv->stats.rx_bytes += len;
 260                 if (desc0 & RX_DESC0_MULTICAST)
 261                         priv->stats.multicast++;
 262
 263 rx_next:
 264                 wmb(); /* prevent setting ownership back too early */
 265                 moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
 266
 267                 rx_head = RX_NEXT(rx_head);
 268                 priv->rx_head = rx_head;
 269         }
 270
 271         if (rx < budget) {
 272                 napi_complete(napi);
 273         }
 274
 275         priv->reg_imr |= RPKT_FINISH_M;
 276         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 277
 278         return rx;
 279 }
 280
 281 static void moxart_tx_finished(struct net_device *ndev)
 282 {
 283         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 284         unsigned tx_head = priv->tx_head;
 285         unsigned tx_tail = priv->tx_tail;
 286
 287         while (tx_tail != tx_head) {
 288                 dma_unmap_single(&ndev->dev, priv->tx_mapping[tx_tail],
 289                                  priv->tx_len[tx_tail], DMA_TO_DEVICE);
 290
 291                 priv->stats.tx_packets++;
 292                 priv->stats.tx_bytes += priv->tx_skb[tx_tail]->len;
 293
 294                 dev_kfree_skb_irq(priv->tx_skb[tx_tail]);
 295                 priv->tx_skb[tx_tail] = NULL;
 296
 297                 tx_tail = TX_NEXT(tx_tail);
 298         }
 299         priv->tx_tail = tx_tail;
 300 }
 301
 302 static irqreturn_t moxart_mac_interrupt(int irq, void *dev_id)
 303 {
 304         struct net_device *ndev = (struct net_device *) dev_id;
 305         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 306         unsigned int ists = readl(priv->base + REG_INTERRUPT_STATUS);
 307
 308         if (ists & XPKT_OK_INT_STS)
 309                 moxart_tx_finished(ndev);
 310
 311         if (ists & RPKT_FINISH) {
 312                 if (napi_schedule_prep(&priv->napi)) {
 313                         priv->reg_imr &= ~RPKT_FINISH_M;
 314                         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 315                         __napi_schedule(&priv->napi);
 316                 }
 317         }
 318
 319         return IRQ_HANDLED;
 320 }
 321
 322 static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 323 {
 324         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 325         void *desc;
 326         unsigned int len;
 327         unsigned int tx_head = priv->tx_head;
 328         u32 txdes1;
 329         int ret = NETDEV_TX_BUSY;
 330
 331         desc = priv->tx_desc_base + (TX_REG_DESC_SIZE * tx_head);
 332
 333         spin_lock_irq(&priv->txlock);
 334         if (moxart_desc_read(desc + TX_REG_OFFSET_DESC0) & TX_DESC0_DMA_OWN) {
 335                 net_dbg_ratelimited("no TX space for packet\n");
 336                 priv->stats.tx_dropped++;
 337                 goto out_unlock;
 338         }
 339         rmb(); /* ensure data is only read that had TX_DESC0_DMA_OWN cleared */
 340
 341         len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len;
 342
 343         priv->tx_mapping[tx_head] = dma_map_single(&ndev->dev, skb->data,
 344                                                    len, DMA_TO_DEVICE);
 345         if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) {
 346                 netdev_err(ndev, "DMA mapping error\n");
 347                 goto out_unlock;
 348         }
 349
 350         priv->tx_len[tx_head] = len;
 351         priv->tx_skb[tx_head] = skb;
 352
 353         moxart_desc_write(priv->tx_mapping[tx_head],
 354                desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_PHYS);
 355         moxart_desc_write((uintptr_t)skb->data,
 356                desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_VIRT);
 357
 358         if (skb->len < ETH_ZLEN) {
 359                 memset(&skb->data[skb->len],
 360                        0, ETH_ZLEN - skb->len);
 361                 len = ETH_ZLEN;
 362         }
 363
 364         dma_sync_single_for_device(&ndev->dev, priv->tx_mapping[tx_head],
 365                                    priv->tx_buf_size, DMA_TO_DEVICE);
 366
 367         txdes1 = TX_DESC1_LTS | TX_DESC1_FTS | (len & TX_DESC1_BUF_SIZE_MASK);
 368         if (tx_head == TX_DESC_NUM_MASK)
 369                 txdes1 |= TX_DESC1_END;
 370         moxart_desc_write(txdes1, desc + TX_REG_OFFSET_DESC1);
 371         wmb(); /* flush descriptor before transferring ownership */
 372         moxart_desc_write(TX_DESC0_DMA_OWN, desc + TX_REG_OFFSET_DESC0);
 373
 374         /* start to send packet */
 375         writel(0xffffffff, priv->base + REG_TX_POLL_DEMAND);
 376
 377         priv->tx_head = TX_NEXT(tx_head);
 378
 379         netif_trans_update(ndev);
 380         ret = NETDEV_TX_OK;
 381 out_unlock:
 382         spin_unlock_irq(&priv->txlock);
 383
 384         return ret;
 385 }
 386
 387 static struct net_device_stats *moxart_mac_get_stats(struct net_device *ndev)
 388 {
 389         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 390
 391         return &priv->stats;
 392 }
 393
 394 static void moxart_mac_setmulticast(struct net_device *ndev)
 395 {
 396         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 397         struct netdev_hw_addr *ha;
 398         int crc_val;
 399
 400         netdev_for_each_mc_addr(ha, ndev) {
 401                 crc_val = crc32_le(~0, ha->addr, ETH_ALEN);
 402                 crc_val = (crc_val >> 26) & 0x3f;
 403                 if (crc_val >= 32) {
 404                         writel(readl(priv->base + REG_MCAST_HASH_TABLE1) |
 405                                (1UL << (crc_val - 32)),
 406                                priv->base + REG_MCAST_HASH_TABLE1);
 407                 } else {
 408                         writel(readl(priv->base + REG_MCAST_HASH_TABLE0) |
 409                                (1UL << crc_val),
 410                                priv->base + REG_MCAST_HASH_TABLE0);
 411                 }
 412         }
 413 }
 414
 415 static void moxart_mac_set_rx_mode(struct net_device *ndev)
 416 {
 417         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 418
 419         spin_lock_irq(&priv->txlock);
 420
 421         (ndev->flags & IFF_PROMISC) ? (priv->reg_maccr |= RCV_ALL) :
 422                                       (priv->reg_maccr &= ~RCV_ALL);
 423
 424         (ndev->flags & IFF_ALLMULTI) ? (priv->reg_maccr |= RX_MULTIPKT) :
 425                                        (priv->reg_maccr &= ~RX_MULTIPKT);
 426
 427         if ((ndev->flags & IFF_MULTICAST) && netdev_mc_count(ndev)) {
 428                 priv->reg_maccr |= HT_MULTI_EN;
 429                 moxart_mac_setmulticast(ndev);
 430         } else {
 431                 priv->reg_maccr &= ~HT_MULTI_EN;
 432         }
 433
 434         writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
 435
 436         spin_unlock_irq(&priv->txlock);
 437 }
 438
 439 static struct net_device_ops moxart_netdev_ops = {
 440         .ndo_open               = moxart_mac_open,
 441         .ndo_stop               = moxart_mac_stop,
 442         .ndo_start_xmit         = moxart_mac_start_xmit,
 443         .ndo_get_stats          = moxart_mac_get_stats,
 444         .ndo_set_rx_mode        = moxart_mac_set_rx_mode,
 445         .ndo_set_mac_address    = moxart_set_mac_address,
 446         .ndo_validate_addr      = eth_validate_addr,
 447 };
 448
 449 static int moxart_mac_probe(struct platform_device *pdev)
 450 {
 451         struct device *p_dev = &pdev->dev;
 452         struct device_node *node = p_dev->of_node;
 453         struct net_device *ndev;
 454         struct moxart_mac_priv_t *priv;
 455         struct resource *res;
 456         unsigned int irq;
 457         int ret;
 458
 459         ndev = alloc_etherdev(sizeof(struct moxart_mac_priv_t));
 460         if (!ndev)
 461                 return -ENOMEM;
 462
 463         irq = irq_of_parse_and_map(node, 0);
 464         if (irq <= 0) {
 465                 netdev_err(ndev, "irq_of_parse_and_map failed\n");
 466                 ret = -EINVAL;
 467                 goto irq_map_fail;
 468         }
 469
 470         priv = netdev_priv(ndev);
 471         priv->ndev = ndev;
 472
 473         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 474         ndev->base_addr = res->start;
 475         priv->base = devm_ioremap_resource(p_dev, res);
 476         if (IS_ERR(priv->base)) {
 477                 dev_err(p_dev, "devm_ioremap_resource failed\n");
 478                 ret = PTR_ERR(priv->base);
 479                 goto init_fail;
 480         }
 481
 482         spin_lock_init(&priv->txlock);
 483
 484         priv->tx_buf_size = TX_BUF_SIZE;
 485         priv->rx_buf_size = RX_BUF_SIZE;
 486
 487         priv->tx_desc_base = dma_alloc_coherent(NULL, TX_REG_DESC_SIZE *
 488                                                 TX_DESC_NUM, &priv->tx_base,
 489                                                 GFP_DMA | GFP_KERNEL);
 490         if (priv->tx_desc_base == NULL) {
 491                 ret = -ENOMEM;
 492                 goto init_fail;
 493         }
 494
 495         priv->rx_desc_base = dma_alloc_coherent(NULL, RX_REG_DESC_SIZE *
 496                                                 RX_DESC_NUM, &priv->rx_base,
 497                                                 GFP_DMA | GFP_KERNEL);
 498         if (priv->rx_desc_base == NULL) {
 499                 ret = -ENOMEM;
 500                 goto init_fail;
 501         }
 502
 503         priv->tx_buf_base = kmalloc(priv->tx_buf_size * TX_DESC_NUM,
 504                                     GFP_ATOMIC);
 505         if (!priv->tx_buf_base) {
 506                 ret = -ENOMEM;
 507                 goto init_fail;
 508         }
 509
 510         priv->rx_buf_base = kmalloc(priv->rx_buf_size * RX_DESC_NUM,
 511                                     GFP_ATOMIC);
 512         if (!priv->rx_buf_base) {
 513                 ret = -ENOMEM;
 514                 goto init_fail;
 515         }
 516
 517         platform_set_drvdata(pdev, ndev);
 518
 519         ret = devm_request_irq(p_dev, irq, moxart_mac_interrupt, 0,
 520                                pdev->name, ndev);
 521         if (ret) {
 522                 netdev_err(ndev, "devm_request_irq failed\n");
 523                 goto init_fail;
 524         }
 525
 526         ndev->netdev_ops = &moxart_netdev_ops;
 527         netif_napi_add(ndev, &priv->napi, moxart_rx_poll, RX_DESC_NUM);
 528         ndev->priv_flags |= IFF_UNICAST_FLT;
 529         ndev->irq = irq;
 530
 531         SET_NETDEV_DEV(ndev, &pdev->dev);
 532
 533         ret = register_netdev(ndev);
 534         if (ret) {
 535                 free_netdev(ndev);
 536                 goto init_fail;
 537         }
 538
 539         netdev_dbg(ndev, "%s: IRQ=%d address=%pM\n",
 540                    __func__, ndev->irq, ndev->dev_addr);
 541
 542         return 0;
 543
 544 init_fail:
 545         netdev_err(ndev, "init failed\n");
 546         moxart_mac_free_memory(ndev);
 547 irq_map_fail:
 548         free_netdev(ndev);
 549         return ret;
 550 }
 551
 552 static int moxart_remove(struct platform_device *pdev)
 553 {
 554         struct net_device *ndev = platform_get_drvdata(pdev);
 555
 556         unregister_netdev(ndev);
 557         free_irq(ndev->irq, ndev);
 558         moxart_mac_free_memory(ndev);
 559         free_netdev(ndev);
 560
 561         return 0;
 562 }
 563
 564 static const struct of_device_id moxart_mac_match[] = {
 565         { .compatible = "moxa,moxart-mac" },
 566         { }
 567 };
 568 MODULE_DEVICE_TABLE(of, moxart_mac_match);
 569
 570 static struct platform_driver moxart_mac_driver = {
 571         .probe  = moxart_mac_probe,
 572         .remove = moxart_remove,
 573         .driver = {
 574                 .name           = "moxart-ethernet",
 575                 .of_match_table = moxart_mac_match,
 576         },
 577 };
 578 module_platform_driver(moxart_mac_driver);
 579
 580 MODULE_DESCRIPTION("MOXART RTL8201CP Ethernet driver");
 581 MODULE_LICENSE("GPL v2");
 582 MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>");