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 #include <linux/circ_buf.h>
  29
  30 #include "moxart_ether.h"
  31
  32 static inline void moxart_desc_write(u32 data, u32 *desc)
  33 {
  34         *desc = cpu_to_le32(data);
  35 }
  36
  37 static inline u32 moxart_desc_read(u32 *desc)
  38 {
  39         return le32_to_cpu(*desc);
  40 }
  41
  42 static inline void moxart_emac_write(struct net_device *ndev,
  43                                      unsigned int reg, unsigned long value)
  44 {
  45         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  46
  47         writel(value, priv->base + reg);
  48 }
  49
  50 static void moxart_update_mac_address(struct net_device *ndev)
  51 {
  52         moxart_emac_write(ndev, REG_MAC_MS_ADDRESS,
  53                           ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1])));
  54         moxart_emac_write(ndev, REG_MAC_MS_ADDRESS + 4,
  55                           ((ndev->dev_addr[2] << 24) |
  56                            (ndev->dev_addr[3] << 16) |
  57                            (ndev->dev_addr[4] << 8) |
  58                            (ndev->dev_addr[5])));
  59 }
  60
  61 static int moxart_set_mac_address(struct net_device *ndev, void *addr)
  62 {
  63         struct sockaddr *address = addr;
  64
  65         if (!is_valid_ether_addr(address->sa_data))
  66                 return -EADDRNOTAVAIL;
  67
  68         memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len);
  69         moxart_update_mac_address(ndev);
  70
  71         return 0;
  72 }
  73
  74 static void moxart_mac_free_memory(struct net_device *ndev)
  75 {
  76         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  77         int i;
  78
  79         for (i = 0; i < RX_DESC_NUM; i++)
  80                 dma_unmap_single(&ndev->dev, priv->rx_mapping[i],
  81                                  priv->rx_buf_size, DMA_FROM_DEVICE);
  82
  83         if (priv->tx_desc_base)
  84                 dma_free_coherent(NULL, TX_REG_DESC_SIZE * TX_DESC_NUM,
  85                                   priv->tx_desc_base, priv->tx_base);
  86
  87         if (priv->rx_desc_base)
  88                 dma_free_coherent(NULL, RX_REG_DESC_SIZE * RX_DESC_NUM,
  89                                   priv->rx_desc_base, priv->rx_base);
  90
  91         kfree(priv->tx_buf_base);
  92         kfree(priv->rx_buf_base);
  93 }
  94
  95 static void moxart_mac_reset(struct net_device *ndev)
  96 {
  97         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
  98
  99         writel(SW_RST, priv->base + REG_MAC_CTRL);
 100         while (readl(priv->base + REG_MAC_CTRL) & SW_RST)
 101                 mdelay(10);
 102
 103         writel(0, priv->base + REG_INTERRUPT_MASK);
 104
 105         priv->reg_maccr = RX_BROADPKT | FULLDUP | CRC_APD | RX_FTL;
 106 }
 107
 108 static void moxart_mac_enable(struct net_device *ndev)
 109 {
 110         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 111
 112         writel(0x00001010, priv->base + REG_INT_TIMER_CTRL);
 113         writel(0x00000001, priv->base + REG_APOLL_TIMER_CTRL);
 114         writel(0x00000390, priv->base + REG_DMA_BLEN_CTRL);
 115
 116         priv->reg_imr |= (RPKT_FINISH_M | XPKT_FINISH_M);
 117         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 118
 119         priv->reg_maccr |= (RCV_EN | XMT_EN | RDMA_EN | XDMA_EN);
 120         writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
 121 }
 122
 123 static void moxart_mac_setup_desc_ring(struct net_device *ndev)
 124 {
 125         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 126         void *desc;
 127         int i;
 128
 129         for (i = 0; i < TX_DESC_NUM; i++) {
 130                 desc = priv->tx_desc_base + i * TX_REG_DESC_SIZE;
 131                 memset(desc, 0, TX_REG_DESC_SIZE);
 132
 133                 priv->tx_buf[i] = priv->tx_buf_base + priv->tx_buf_size * i;
 134         }
 135         moxart_desc_write(TX_DESC1_END, desc + TX_REG_OFFSET_DESC1);
 136
 137         priv->tx_head = 0;
 138         priv->tx_tail = 0;
 139
 140         for (i = 0; i < RX_DESC_NUM; i++) {
 141                 desc = priv->rx_desc_base + i * RX_REG_DESC_SIZE;
 142                 memset(desc, 0, RX_REG_DESC_SIZE);
 143                 moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
 144                 moxart_desc_write(RX_BUF_SIZE & RX_DESC1_BUF_SIZE_MASK,
 145                        desc + RX_REG_OFFSET_DESC1);
 146
 147                 priv->rx_buf[i] = priv->rx_buf_base + priv->rx_buf_size * i;
 148                 priv->rx_mapping[i] = dma_map_single(&ndev->dev,
 149                                                      priv->rx_buf[i],
 150                                                      priv->rx_buf_size,
 151                                                      DMA_FROM_DEVICE);
 152                 if (dma_mapping_error(&ndev->dev, priv->rx_mapping[i]))
 153                         netdev_err(ndev, "DMA mapping error\n");
 154
 155                 moxart_desc_write(priv->rx_mapping[i],
 156                        desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_PHYS);
 157                 moxart_desc_write((uintptr_t)priv->rx_buf[i],
 158                        desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_VIRT);
 159         }
 160         moxart_desc_write(RX_DESC1_END, desc + RX_REG_OFFSET_DESC1);
 161
 162         priv->rx_head = 0;
 163
 164         /* reset the MAC controller TX/RX desciptor base address */
 165         writel(priv->tx_base, priv->base + REG_TXR_BASE_ADDRESS);
 166         writel(priv->rx_base, priv->base + REG_RXR_BASE_ADDRESS);
 167 }
 168
 169 static int moxart_mac_open(struct net_device *ndev)
 170 {
 171         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 172
 173         if (!is_valid_ether_addr(ndev->dev_addr))
 174                 return -EADDRNOTAVAIL;
 175
 176         napi_enable(&priv->napi);
 177
 178         moxart_mac_reset(ndev);
 179         moxart_update_mac_address(ndev);
 180         moxart_mac_setup_desc_ring(ndev);
 181         moxart_mac_enable(ndev);
 182         netif_start_queue(ndev);
 183
 184         netdev_dbg(ndev, "%s: IMR=0x%x, MACCR=0x%x\n",
 185                    __func__, readl(priv->base + REG_INTERRUPT_MASK),
 186                    readl(priv->base + REG_MAC_CTRL));
 187
 188         return 0;
 189 }
 190
 191 static int moxart_mac_stop(struct net_device *ndev)
 192 {
 193         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 194
 195         napi_disable(&priv->napi);
 196
 197         netif_stop_queue(ndev);
 198
 199         /* disable all interrupts */
 200         writel(0, priv->base + REG_INTERRUPT_MASK);
 201
 202         /* disable all functions */
 203         writel(0, priv->base + REG_MAC_CTRL);
 204
 205         return 0;
 206 }
 207
 208 static int moxart_rx_poll(struct napi_struct *napi, int budget)
 209 {
 210         struct moxart_mac_priv_t *priv = container_of(napi,
 211                                                       struct moxart_mac_priv_t,
 212                                                       napi);
 213         struct net_device *ndev = priv->ndev;
 214         struct sk_buff *skb;
 215         void *desc;
 216         unsigned int desc0, len;
 217         int rx_head = priv->rx_head;
 218         int rx = 0;
 219
 220         while (rx < budget) {
 221                 desc = priv->rx_desc_base + (RX_REG_DESC_SIZE * rx_head);
 222                 desc0 = moxart_desc_read(desc + RX_REG_OFFSET_DESC0);
 223                 rmb(); /* ensure desc0 is up to date */
 224
 225                 if (desc0 & RX_DESC0_DMA_OWN)
 226                         break;
 227
 228                 if (desc0 & (RX_DESC0_ERR | RX_DESC0_CRC_ERR | RX_DESC0_FTL |
 229                              RX_DESC0_RUNT | RX_DESC0_ODD_NB)) {
 230                         net_dbg_ratelimited("packet error\n");
 231                         priv->stats.rx_dropped++;
 232                         priv->stats.rx_errors++;
 233                         goto rx_next;
 234                 }
 235
 236                 len = desc0 & RX_DESC0_FRAME_LEN_MASK;
 237
 238                 if (len > RX_BUF_SIZE)
 239                         len = RX_BUF_SIZE;
 240
 241                 dma_sync_single_for_cpu(&ndev->dev,
 242                                         priv->rx_mapping[rx_head],
 243                                         priv->rx_buf_size, DMA_FROM_DEVICE);
 244                 skb = netdev_alloc_skb_ip_align(ndev, len);
 245
 246                 if (unlikely(!skb)) {
 247                         net_dbg_ratelimited("netdev_alloc_skb_ip_align failed\n");
 248                         priv->stats.rx_dropped++;
 249                         priv->stats.rx_errors++;
 250                         goto rx_next;
 251                 }
 252
 253                 memcpy(skb->data, priv->rx_buf[rx_head], len);
 254                 skb_put(skb, len);
 255                 skb->protocol = eth_type_trans(skb, ndev);
 256                 napi_gro_receive(&priv->napi, skb);
 257                 rx++;
 258
 259                 priv->stats.rx_packets++;
 260                 priv->stats.rx_bytes += len;
 261                 if (desc0 & RX_DESC0_MULTICAST)
 262                         priv->stats.multicast++;
 263
 264 rx_next:
 265                 wmb(); /* prevent setting ownership back too early */
 266                 moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
 267
 268                 rx_head = RX_NEXT(rx_head);
 269                 priv->rx_head = rx_head;
 270         }
 271
 272         if (rx < budget) {
 273                 napi_complete_done(napi, rx);
 274         }
 275
 276         priv->reg_imr |= RPKT_FINISH_M;
 277         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 278
 279         return rx;
 280 }
 281
 282 static int moxart_tx_queue_space(struct net_device *ndev)
 283 {
 284         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 285
 286         return CIRC_SPACE(priv->tx_head, priv->tx_tail, TX_DESC_NUM);
 287 }
 288
 289 static void moxart_tx_finished(struct net_device *ndev)
 290 {
 291         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 292         unsigned tx_head = priv->tx_head;
 293         unsigned tx_tail = priv->tx_tail;
 294
 295         while (tx_tail != tx_head) {
 296                 dma_unmap_single(&ndev->dev, priv->tx_mapping[tx_tail],
 297                                  priv->tx_len[tx_tail], DMA_TO_DEVICE);
 298
 299                 priv->stats.tx_packets++;
 300                 priv->stats.tx_bytes += priv->tx_skb[tx_tail]->len;
 301
 302                 dev_kfree_skb_irq(priv->tx_skb[tx_tail]);
 303                 priv->tx_skb[tx_tail] = NULL;
 304
 305                 tx_tail = TX_NEXT(tx_tail);
 306         }
 307         priv->tx_tail = tx_tail;
 308         if (netif_queue_stopped(ndev) &&
 309             moxart_tx_queue_space(ndev) >= TX_WAKE_THRESHOLD)
 310                 netif_wake_queue(ndev);
 311 }
 312
 313 static irqreturn_t moxart_mac_interrupt(int irq, void *dev_id)
 314 {
 315         struct net_device *ndev = (struct net_device *) dev_id;
 316         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 317         unsigned int ists = readl(priv->base + REG_INTERRUPT_STATUS);
 318
 319         if (ists & XPKT_OK_INT_STS)
 320                 moxart_tx_finished(ndev);
 321
 322         if (ists & RPKT_FINISH) {
 323                 if (napi_schedule_prep(&priv->napi)) {
 324                         priv->reg_imr &= ~RPKT_FINISH_M;
 325                         writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
 326                         __napi_schedule(&priv->napi);
 327                 }
 328         }
 329
 330         return IRQ_HANDLED;
 331 }
 332
 333 static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 334 {
 335         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 336         void *desc;
 337         unsigned int len;
 338         unsigned int tx_head;
 339         u32 txdes1;
 340         int ret = NETDEV_TX_BUSY;
 341
 342         spin_lock_irq(&priv->txlock);
 343
 344         tx_head = priv->tx_head;
 345         desc = priv->tx_desc_base + (TX_REG_DESC_SIZE * tx_head);
 346
 347         if (moxart_tx_queue_space(ndev) == 1)
 348                 netif_stop_queue(ndev);
 349
 350         if (moxart_desc_read(desc + TX_REG_OFFSET_DESC0) & TX_DESC0_DMA_OWN) {
 351                 net_dbg_ratelimited("no TX space for packet\n");
 352                 priv->stats.tx_dropped++;
 353                 goto out_unlock;
 354         }
 355         rmb(); /* ensure data is only read that had TX_DESC0_DMA_OWN cleared */
 356
 357         len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len;
 358
 359         priv->tx_mapping[tx_head] = dma_map_single(&ndev->dev, skb->data,
 360                                                    len, DMA_TO_DEVICE);
 361         if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) {
 362                 netdev_err(ndev, "DMA mapping error\n");
 363                 goto out_unlock;
 364         }
 365
 366         priv->tx_len[tx_head] = len;
 367         priv->tx_skb[tx_head] = skb;
 368
 369         moxart_desc_write(priv->tx_mapping[tx_head],
 370                desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_PHYS);
 371         moxart_desc_write((uintptr_t)skb->data,
 372                desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_VIRT);
 373
 374         if (skb->len < ETH_ZLEN) {
 375                 memset(&skb->data[skb->len],
 376                        0, ETH_ZLEN - skb->len);
 377                 len = ETH_ZLEN;
 378         }
 379
 380         dma_sync_single_for_device(&ndev->dev, priv->tx_mapping[tx_head],
 381                                    priv->tx_buf_size, DMA_TO_DEVICE);
 382
 383         txdes1 = TX_DESC1_LTS | TX_DESC1_FTS | (len & TX_DESC1_BUF_SIZE_MASK);
 384         if (tx_head == TX_DESC_NUM_MASK)
 385                 txdes1 |= TX_DESC1_END;
 386         moxart_desc_write(txdes1, desc + TX_REG_OFFSET_DESC1);
 387         wmb(); /* flush descriptor before transferring ownership */
 388         moxart_desc_write(TX_DESC0_DMA_OWN, desc + TX_REG_OFFSET_DESC0);
 389
 390         /* start to send packet */
 391         writel(0xffffffff, priv->base + REG_TX_POLL_DEMAND);
 392
 393         priv->tx_head = TX_NEXT(tx_head);
 394
 395         netif_trans_update(ndev);
 396         ret = NETDEV_TX_OK;
 397 out_unlock:
 398         spin_unlock_irq(&priv->txlock);
 399
 400         return ret;
 401 }
 402
 403 static struct net_device_stats *moxart_mac_get_stats(struct net_device *ndev)
 404 {
 405         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 406
 407         return &priv->stats;
 408 }
 409
 410 static void moxart_mac_setmulticast(struct net_device *ndev)
 411 {
 412         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 413         struct netdev_hw_addr *ha;
 414         int crc_val;
 415
 416         netdev_for_each_mc_addr(ha, ndev) {
 417                 crc_val = crc32_le(~0, ha->addr, ETH_ALEN);
 418                 crc_val = (crc_val >> 26) & 0x3f;
 419                 if (crc_val >= 32) {
 420                         writel(readl(priv->base + REG_MCAST_HASH_TABLE1) |
 421                                (1UL << (crc_val - 32)),
 422                                priv->base + REG_MCAST_HASH_TABLE1);
 423                 } else {
 424                         writel(readl(priv->base + REG_MCAST_HASH_TABLE0) |
 425                                (1UL << crc_val),
 426                                priv->base + REG_MCAST_HASH_TABLE0);
 427                 }
 428         }
 429 }
 430
 431 static void moxart_mac_set_rx_mode(struct net_device *ndev)
 432 {
 433         struct moxart_mac_priv_t *priv = netdev_priv(ndev);
 434
 435         spin_lock_irq(&priv->txlock);
 436
 437         (ndev->flags & IFF_PROMISC) ? (priv->reg_maccr |= RCV_ALL) :
 438                                       (priv->reg_maccr &= ~RCV_ALL);
 439
 440         (ndev->flags & IFF_ALLMULTI) ? (priv->reg_maccr |= RX_MULTIPKT) :
 441                                        (priv->reg_maccr &= ~RX_MULTIPKT);
 442
 443         if ((ndev->flags & IFF_MULTICAST) && netdev_mc_count(ndev)) {
 444                 priv->reg_maccr |= HT_MULTI_EN;
 445                 moxart_mac_setmulticast(ndev);
 446         } else {
 447                 priv->reg_maccr &= ~HT_MULTI_EN;
 448         }
 449
 450         writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
 451
 452         spin_unlock_irq(&priv->txlock);
 453 }
 454
 455 static const struct net_device_ops moxart_netdev_ops = {
 456         .ndo_open               = moxart_mac_open,
 457         .ndo_stop               = moxart_mac_stop,
 458         .ndo_start_xmit         = moxart_mac_start_xmit,
 459         .ndo_get_stats          = moxart_mac_get_stats,
 460         .ndo_set_rx_mode        = moxart_mac_set_rx_mode,
 461         .ndo_set_mac_address    = moxart_set_mac_address,
 462         .ndo_validate_addr      = eth_validate_addr,
 463 };
 464
 465 static int moxart_mac_probe(struct platform_device *pdev)
 466 {
 467         struct device *p_dev = &pdev->dev;
 468         struct device_node *node = p_dev->of_node;
 469         struct net_device *ndev;
 470         struct moxart_mac_priv_t *priv;
 471         struct resource *res;
 472         unsigned int irq;
 473         int ret;
 474
 475         ndev = alloc_etherdev(sizeof(struct moxart_mac_priv_t));
 476         if (!ndev)
 477                 return -ENOMEM;
 478
 479         irq = irq_of_parse_and_map(node, 0);
 480         if (irq <= 0) {
 481                 netdev_err(ndev, "irq_of_parse_and_map failed\n");
 482                 ret = -EINVAL;
 483                 goto irq_map_fail;
 484         }
 485
 486         priv = netdev_priv(ndev);
 487         priv->ndev = ndev;
 488
 489         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 490         ndev->base_addr = res->start;
 491         priv->base = devm_ioremap_resource(p_dev, res);
 492         if (IS_ERR(priv->base)) {
 493                 dev_err(p_dev, "devm_ioremap_resource failed\n");
 494                 ret = PTR_ERR(priv->base);
 495                 goto init_fail;
 496         }
 497
 498         spin_lock_init(&priv->txlock);
 499
 500         priv->tx_buf_size = TX_BUF_SIZE;
 501         priv->rx_buf_size = RX_BUF_SIZE;
 502
 503         priv->tx_desc_base = dma_alloc_coherent(NULL, TX_REG_DESC_SIZE *
 504                                                 TX_DESC_NUM, &priv->tx_base,
 505                                                 GFP_DMA | GFP_KERNEL);
 506         if (priv->tx_desc_base == NULL) {
 507                 ret = -ENOMEM;
 508                 goto init_fail;
 509         }
 510
 511         priv->rx_desc_base = dma_alloc_coherent(NULL, RX_REG_DESC_SIZE *
 512                                                 RX_DESC_NUM, &priv->rx_base,
 513                                                 GFP_DMA | GFP_KERNEL);
 514         if (priv->rx_desc_base == NULL) {
 515                 ret = -ENOMEM;
 516                 goto init_fail;
 517         }
 518
 519         priv->tx_buf_base = kmalloc(priv->tx_buf_size * TX_DESC_NUM,
 520                                     GFP_ATOMIC);
 521         if (!priv->tx_buf_base) {
 522                 ret = -ENOMEM;
 523                 goto init_fail;
 524         }
 525
 526         priv->rx_buf_base = kmalloc(priv->rx_buf_size * RX_DESC_NUM,
 527                                     GFP_ATOMIC);
 528         if (!priv->rx_buf_base) {
 529                 ret = -ENOMEM;
 530                 goto init_fail;
 531         }
 532
 533         platform_set_drvdata(pdev, ndev);
 534
 535         ret = devm_request_irq(p_dev, irq, moxart_mac_interrupt, 0,
 536                                pdev->name, ndev);
 537         if (ret) {
 538                 netdev_err(ndev, "devm_request_irq failed\n");
 539                 goto init_fail;
 540         }
 541
 542         ndev->netdev_ops = &moxart_netdev_ops;
 543         netif_napi_add(ndev, &priv->napi, moxart_rx_poll, RX_DESC_NUM);
 544         ndev->priv_flags |= IFF_UNICAST_FLT;
 545         ndev->irq = irq;
 546
 547         SET_NETDEV_DEV(ndev, &pdev->dev);
 548
 549         ret = register_netdev(ndev);
 550         if (ret) {
 551                 free_netdev(ndev);
 552                 goto init_fail;
 553         }
 554
 555         netdev_dbg(ndev, "%s: IRQ=%d address=%pM\n",
 556                    __func__, ndev->irq, ndev->dev_addr);
 557
 558         return 0;
 559
 560 init_fail:
 561         netdev_err(ndev, "init failed\n");
 562         moxart_mac_free_memory(ndev);
 563 irq_map_fail:
 564         free_netdev(ndev);
 565         return ret;
 566 }
 567
 568 static int moxart_remove(struct platform_device *pdev)
 569 {
 570         struct net_device *ndev = platform_get_drvdata(pdev);
 571
 572         unregister_netdev(ndev);
 573         free_irq(ndev->irq, ndev);
 574         moxart_mac_free_memory(ndev);
 575         free_netdev(ndev);
 576
 577         return 0;
 578 }
 579
 580 static const struct of_device_id moxart_mac_match[] = {
 581         { .compatible = "moxa,moxart-mac" },
 582         { }
 583 };
 584 MODULE_DEVICE_TABLE(of, moxart_mac_match);
 585
 586 static struct platform_driver moxart_mac_driver = {
 587         .probe  = moxart_mac_probe,
 588         .remove = moxart_remove,
 589         .driver = {
 590                 .name           = "moxart-ethernet",
 591                 .of_match_table = moxart_mac_match,
 592         },
 593 };
 594 module_platform_driver(moxart_mac_driver);
 595
 596 MODULE_DESCRIPTION("MOXART RTL8201CP Ethernet driver");
 597 MODULE_LICENSE("GPL v2");
 598 MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>");