target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include "ag71xx.h"
  15
  16 #define AG71XX_DEFAULT_MSG_ENABLE       \
  17         (NETIF_MSG_DRV                  \
  18         | NETIF_MSG_PROBE               \
  19         | NETIF_MSG_LINK                \
  20         | NETIF_MSG_TIMER               \
  21         | NETIF_MSG_IFDOWN              \
  22         | NETIF_MSG_IFUP                \
  23         | NETIF_MSG_RX_ERR              \
  24         | NETIF_MSG_TX_ERR)
  25
  26 static int ag71xx_msg_level = -1;
  27
  28 module_param_named(msg_level, ag71xx_msg_level, int, 0);
  29 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
  30
  31 static void ag71xx_dump_dma_regs(struct ag71xx *ag)
  32 {
  33         DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
  34                 ag->dev->name,
  35                 ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
  36                 ag71xx_rr(ag, AG71XX_REG_TX_DESC),
  37                 ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
  38
  39         DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
  40                 ag->dev->name,
  41                 ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
  42                 ag71xx_rr(ag, AG71XX_REG_RX_DESC),
  43                 ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
  44 }
  45
  46 static void ag71xx_dump_regs(struct ag71xx *ag)
  47 {
  48         DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n",
  49                 ag->dev->name,
  50                 ag71xx_rr(ag, AG71XX_REG_MAC_CFG1),
  51                 ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
  52                 ag71xx_rr(ag, AG71XX_REG_MAC_IPG),
  53                 ag71xx_rr(ag, AG71XX_REG_MAC_HDX),
  54                 ag71xx_rr(ag, AG71XX_REG_MAC_MFL));
  55         DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n",
  56                 ag->dev->name,
  57                 ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
  58                 ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1),
  59                 ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2));
  60         DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n",
  61                 ag->dev->name,
  62                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
  63                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
  64                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
  65         DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n",
  66                 ag->dev->name,
  67                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
  68                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
  69                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
  70 }
  71
  72 static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
  73 {
  74         DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
  75                 ag->dev->name, label, intr,
  76                 (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
  77                 (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
  78                 (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
  79                 (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
  80                 (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
  81                 (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
  82 }
  83
  84 static void ag71xx_ring_free(struct ag71xx_ring *ring)
  85 {
  86         kfree(ring->buf);
  87
  88         if (ring->descs_cpu)
  89                 dma_free_coherent(NULL, ring->size * ring->desc_size,
  90                                   ring->descs_cpu, ring->descs_dma);
  91 }
  92
  93 static int ag71xx_ring_alloc(struct ag71xx_ring *ring)
  94 {
  95         int err;
  96         int i;
  97
  98         ring->desc_size = sizeof(struct ag71xx_desc);
  99         if (ring->desc_size % cache_line_size()) {
 100                 DBG("ag71xx: ring %p, desc size %u rounded to %u\n",
 101                         ring, ring->desc_size,
 102                         roundup(ring->desc_size, cache_line_size()));
 103                 ring->desc_size = roundup(ring->desc_size, cache_line_size());
 104         }
 105
 106         ring->descs_cpu = dma_alloc_coherent(NULL, ring->size * ring->desc_size,
 107                                              &ring->descs_dma, GFP_ATOMIC);
 108         if (!ring->descs_cpu) {
 109                 err = -ENOMEM;
 110                 goto err;
 111         }
 112
 113
 114         ring->buf = kzalloc(ring->size * sizeof(*ring->buf), GFP_KERNEL);
 115         if (!ring->buf) {
 116                 err = -ENOMEM;
 117                 goto err;
 118         }
 119
 120         for (i = 0; i < ring->size; i++) {
 121                 int idx = i * ring->desc_size;
 122                 ring->buf[i].desc = (struct ag71xx_desc *)&ring->descs_cpu[idx];
 123                 DBG("ag71xx: ring %p, desc %d at %p\n",
 124                         ring, i, ring->buf[i].desc);
 125         }
 126
 127         return 0;
 128
 129 err:
 130         return err;
 131 }
 132
 133 static void ag71xx_ring_tx_clean(struct ag71xx *ag)
 134 {
 135         struct ag71xx_ring *ring = &ag->tx_ring;
 136         struct net_device *dev = ag->dev;
 137
 138         while (ring->curr != ring->dirty) {
 139                 u32 i = ring->dirty % ring->size;
 140
 141                 if (!ag71xx_desc_empty(ring->buf[i].desc)) {
 142                         ring->buf[i].desc->ctrl = 0;
 143                         dev->stats.tx_errors++;
 144                 }
 145
 146                 if (ring->buf[i].skb)
 147                         dev_kfree_skb_any(ring->buf[i].skb);
 148
 149                 ring->buf[i].skb = NULL;
 150
 151                 ring->dirty++;
 152         }
 153
 154         /* flush descriptors */
 155         wmb();
 156
 157 }
 158
 159 static void ag71xx_ring_tx_init(struct ag71xx *ag)
 160 {
 161         struct ag71xx_ring *ring = &ag->tx_ring;
 162         int i;
 163
 164         for (i = 0; i < ring->size; i++) {
 165                 ring->buf[i].desc->next = (u32) (ring->descs_dma +
 166                         ring->desc_size * ((i + 1) % ring->size));
 167
 168                 ring->buf[i].desc->ctrl = DESC_EMPTY;
 169                 ring->buf[i].skb = NULL;
 170         }
 171
 172         /* flush descriptors */
 173         wmb();
 174
 175         ring->curr = 0;
 176         ring->dirty = 0;
 177 }
 178
 179 static void ag71xx_ring_rx_clean(struct ag71xx *ag)
 180 {
 181         struct ag71xx_ring *ring = &ag->rx_ring;
 182         int i;
 183
 184         if (!ring->buf)
 185                 return;
 186
 187         for (i = 0; i < ring->size; i++)
 188                 if (ring->buf[i].skb) {
 189                         dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr,
 190                                          AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE);
 191                         kfree_skb(ring->buf[i].skb);
 192                 }
 193 }
 194
 195 static int ag71xx_rx_reserve(struct ag71xx *ag)
 196 {
 197         int reserve = 0;
 198
 199         if (ag71xx_get_pdata(ag)->is_ar724x) {
 200                 if (!ag71xx_has_ar8216(ag))
 201                         reserve = 2;
 202
 203                 if (ag->phy_dev)
 204                         reserve += 4 - (ag->phy_dev->pkt_align % 4);
 205
 206                 reserve %= 4;
 207         }
 208
 209         return reserve + AG71XX_RX_PKT_RESERVE;
 210 }
 211
 212
 213 static int ag71xx_ring_rx_init(struct ag71xx *ag)
 214 {
 215         struct ag71xx_ring *ring = &ag->rx_ring;
 216         unsigned int reserve = ag71xx_rx_reserve(ag);
 217         unsigned int i;
 218         int ret;
 219
 220         ret = 0;
 221         for (i = 0; i < ring->size; i++) {
 222                 ring->buf[i].desc->next = (u32) (ring->descs_dma +
 223                         ring->desc_size * ((i + 1) % ring->size));
 224
 225                 DBG("ag71xx: RX desc at %p, next is %08x\n",
 226                         ring->buf[i].desc,
 227                         ring->buf[i].desc->next);
 228         }
 229
 230         for (i = 0; i < ring->size; i++) {
 231                 struct sk_buff *skb;
 232                 dma_addr_t dma_addr;
 233
 234                 skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + reserve);
 235                 if (!skb) {
 236                         ret = -ENOMEM;
 237                         break;
 238                 }
 239
 240                 skb->dev = ag->dev;
 241                 skb_reserve(skb, reserve);
 242
 243                 dma_addr = dma_map_single(&ag->dev->dev, skb->data,
 244                                           AG71XX_RX_PKT_SIZE,
 245                                           DMA_FROM_DEVICE);
 246                 ring->buf[i].skb = skb;
 247                 ring->buf[i].dma_addr = dma_addr;
 248                 ring->buf[i].desc->data = (u32) dma_addr;
 249                 ring->buf[i].desc->ctrl = DESC_EMPTY;
 250         }
 251
 252         /* flush descriptors */
 253         wmb();
 254
 255         ring->curr = 0;
 256         ring->dirty = 0;
 257
 258         return ret;
 259 }
 260
 261 static int ag71xx_ring_rx_refill(struct ag71xx *ag)
 262 {
 263         struct ag71xx_ring *ring = &ag->rx_ring;
 264         unsigned int reserve = ag71xx_rx_reserve(ag);
 265         unsigned int count;
 266
 267         count = 0;
 268         for (; ring->curr - ring->dirty > 0; ring->dirty++) {
 269                 unsigned int i;
 270
 271                 i = ring->dirty % ring->size;
 272
 273                 if (ring->buf[i].skb == NULL) {
 274                         dma_addr_t dma_addr;
 275                         struct sk_buff *skb;
 276
 277                         skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + reserve);
 278                         if (skb == NULL)
 279                                 break;
 280
 281                         skb_reserve(skb, reserve);
 282                         skb->dev = ag->dev;
 283
 284                         dma_addr = dma_map_single(&ag->dev->dev, skb->data,
 285                                                   AG71XX_RX_PKT_SIZE,
 286                                                   DMA_FROM_DEVICE);
 287
 288                         ring->buf[i].skb = skb;
 289                         ring->buf[i].dma_addr = dma_addr;
 290                         ring->buf[i].desc->data = (u32) dma_addr;
 291                 }
 292
 293                 ring->buf[i].desc->ctrl = DESC_EMPTY;
 294                 count++;
 295         }
 296
 297         /* flush descriptors */
 298         wmb();
 299
 300         DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count);
 301
 302         return count;
 303 }
 304
 305 static int ag71xx_rings_init(struct ag71xx *ag)
 306 {
 307         int ret;
 308
 309         ret = ag71xx_ring_alloc(&ag->tx_ring);
 310         if (ret)
 311                 return ret;
 312
 313         ag71xx_ring_tx_init(ag);
 314
 315         ret = ag71xx_ring_alloc(&ag->rx_ring);
 316         if (ret)
 317                 return ret;
 318
 319         ret = ag71xx_ring_rx_init(ag);
 320         return ret;
 321 }
 322
 323 static void ag71xx_rings_cleanup(struct ag71xx *ag)
 324 {
 325         ag71xx_ring_rx_clean(ag);
 326         ag71xx_ring_free(&ag->rx_ring);
 327
 328         ag71xx_ring_tx_clean(ag);
 329         ag71xx_ring_free(&ag->tx_ring);
 330 }
 331
 332 static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
 333 {
 334         switch (ag->speed) {
 335         case SPEED_1000:
 336                 return "1000";
 337         case SPEED_100:
 338                 return "100";
 339         case SPEED_10:
 340                 return "10";
 341         }
 342
 343         return "?";
 344 }
 345
 346 static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
 347 {
 348         u32 t;
 349
 350         t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16)
 351           | (((u32) mac[3]) << 8) | ((u32) mac[2]);
 352
 353         ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
 354
 355         t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16);
 356         ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
 357 }
 358
 359 static void ag71xx_dma_reset(struct ag71xx *ag)
 360 {
 361         u32 val;
 362         int i;
 363
 364         ag71xx_dump_dma_regs(ag);
 365
 366         /* stop RX and TX */
 367         ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
 368         ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
 369
 370         /*
 371          * give the hardware some time to really stop all rx/tx activity
 372          * clearing the descriptors too early causes random memory corruption
 373          */
 374         mdelay(1);
 375
 376         /* clear descriptor addresses */
 377         ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma);
 378         ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma);
 379
 380         /* clear pending RX/TX interrupts */
 381         for (i = 0; i < 256; i++) {
 382                 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
 383                 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
 384         }
 385
 386         /* clear pending errors */
 387         ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
 388         ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
 389
 390         val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
 391         if (val)
 392                 printk(KERN_ALERT "%s: unable to clear DMA Rx status: %08x\n",
 393                         ag->dev->name, val);
 394
 395         val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
 396
 397         /* mask out reserved bits */
 398         val &= ~0xff000000;
 399
 400         if (val)
 401                 printk(KERN_ALERT "%s: unable to clear DMA Tx status: %08x\n",
 402                         ag->dev->name, val);
 403
 404         ag71xx_dump_dma_regs(ag);
 405 }
 406
 407 #define MAC_CFG1_INIT   (MAC_CFG1_RXE | MAC_CFG1_TXE | \
 408                          MAC_CFG1_SRX | MAC_CFG1_STX)
 409
 410 #define FIFO_CFG0_INIT  (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
 411
 412 #define FIFO_CFG4_INIT  (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
 413                          FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
 414                          FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
 415                          FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
 416                          FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
 417                          FIFO_CFG4_VT)
 418
 419 #define FIFO_CFG5_INIT  (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
 420                          FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
 421                          FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
 422                          FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
 423                          FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
 424                          FIFO_CFG5_17 | FIFO_CFG5_SF)
 425
 426 static void ag71xx_hw_stop(struct ag71xx *ag)
 427 {
 428         /* disable all interrupts and stop the rx/tx engine */
 429         ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
 430         ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
 431         ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
 432 }
 433
 434 static void ag71xx_hw_setup(struct ag71xx *ag)
 435 {
 436         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 437
 438         /* setup MAC configuration registers */
 439         ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
 440
 441         ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
 442                   MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
 443
 444         /* setup max frame length */
 445         ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
 446
 447         /* setup FIFO configuration registers */
 448         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
 449         if (pdata->is_ar724x) {
 450                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, pdata->fifo_cfg1);
 451                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, pdata->fifo_cfg2);
 452         } else {
 453                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
 454                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);
 455         }
 456         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
 457         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
 458 }
 459
 460 static void ag71xx_hw_init(struct ag71xx *ag)
 461 {
 462         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 463         u32 reset_mask = pdata->reset_bit;
 464
 465         ag71xx_hw_stop(ag);
 466
 467         if (pdata->is_ar724x) {
 468                 u32 reset_phy = reset_mask;
 469
 470                 reset_phy &= RESET_MODULE_GE0_PHY | RESET_MODULE_GE1_PHY;
 471                 reset_mask &= ~(RESET_MODULE_GE0_PHY | RESET_MODULE_GE1_PHY);
 472
 473                 ar71xx_device_stop(reset_phy);
 474                 mdelay(50);
 475                 ar71xx_device_start(reset_phy);
 476                 mdelay(200);
 477         }
 478
 479         ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
 480         udelay(20);
 481
 482         ar71xx_device_stop(reset_mask);
 483         mdelay(100);
 484         ar71xx_device_start(reset_mask);
 485         mdelay(200);
 486
 487         ag71xx_hw_setup(ag);
 488
 489         ag71xx_dma_reset(ag);
 490 }
 491
 492 static void ag71xx_fast_reset(struct ag71xx *ag)
 493 {
 494         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 495         struct net_device *dev = ag->dev;
 496         u32 reset_mask = pdata->reset_bit;
 497         u32 rx_ds, tx_ds;
 498         u32 mii_reg;
 499
 500         reset_mask &= RESET_MODULE_GE0_MAC | RESET_MODULE_GE1_MAC;
 501
 502         mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
 503         rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
 504         tx_ds = ag71xx_rr(ag, AG71XX_REG_TX_DESC);
 505
 506         ar71xx_device_stop(reset_mask);
 507         udelay(10);
 508         ar71xx_device_start(reset_mask);
 509         udelay(10);
 510
 511         ag71xx_dma_reset(ag);
 512         ag71xx_hw_setup(ag);
 513
 514         ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
 515         ag71xx_wr(ag, AG71XX_REG_TX_DESC, tx_ds);
 516         ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
 517
 518         ag71xx_hw_set_macaddr(ag, dev->dev_addr);
 519 }
 520
 521 static void ag71xx_hw_start(struct ag71xx *ag)
 522 {
 523         /* start RX engine */
 524         ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
 525
 526         /* enable interrupts */
 527         ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
 528 }
 529
 530 void ag71xx_link_adjust(struct ag71xx *ag)
 531 {
 532         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 533         u32 cfg2;
 534         u32 ifctl;
 535         u32 fifo5;
 536
 537         if (!ag->link) {
 538                 ag71xx_hw_stop(ag);
 539                 netif_carrier_off(ag->dev);
 540                 if (netif_msg_link(ag))
 541                         printk(KERN_INFO "%s: link down\n", ag->dev->name);
 542                 return;
 543         }
 544
 545         if (pdata->is_ar724x)
 546                 ag71xx_fast_reset(ag);
 547
 548         cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
 549         cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
 550         cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
 551
 552         ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
 553         ifctl &= ~(MAC_IFCTL_SPEED);
 554
 555         fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
 556         fifo5 &= ~FIFO_CFG5_BM;
 557
 558         switch (ag->speed) {
 559         case SPEED_1000:
 560                 cfg2 |= MAC_CFG2_IF_1000;
 561                 fifo5 |= FIFO_CFG5_BM;
 562                 break;
 563         case SPEED_100:
 564                 cfg2 |= MAC_CFG2_IF_10_100;
 565                 ifctl |= MAC_IFCTL_SPEED;
 566                 break;
 567         case SPEED_10:
 568                 cfg2 |= MAC_CFG2_IF_10_100;
 569                 break;
 570         default:
 571                 BUG();
 572                 return;
 573         }
 574
 575         if (pdata->is_ar91xx)
 576                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff);
 577         else if (pdata->is_ar724x)
 578                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3);
 579         else
 580                 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
 581
 582         if (pdata->set_speed)
 583                 pdata->set_speed(ag->speed);
 584
 585         ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
 586         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
 587         ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
 588         ag71xx_hw_start(ag);
 589
 590         netif_carrier_on(ag->dev);
 591         if (netif_msg_link(ag))
 592                 printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
 593                         ag->dev->name,
 594                         ag71xx_speed_str(ag),
 595                         (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
 596
 597         DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n",
 598                 ag->dev->name,
 599                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
 600                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
 601                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
 602
 603         DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n",
 604                 ag->dev->name,
 605                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
 606                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
 607                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
 608
 609         DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n",
 610                 ag->dev->name,
 611                 ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
 612                 ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
 613                 ag71xx_mii_ctrl_rr(ag));
 614 }
 615
 616 static int ag71xx_open(struct net_device *dev)
 617 {
 618         struct ag71xx *ag = netdev_priv(dev);
 619         int ret;
 620
 621         ret = ag71xx_rings_init(ag);
 622         if (ret)
 623                 goto err;
 624
 625         napi_enable(&ag->napi);
 626
 627         netif_carrier_off(dev);
 628         ag71xx_phy_start(ag);
 629
 630         ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
 631         ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma);
 632
 633         ag71xx_hw_set_macaddr(ag, dev->dev_addr);
 634
 635         netif_start_queue(dev);
 636
 637         return 0;
 638
 639 err:
 640         ag71xx_rings_cleanup(ag);
 641         return ret;
 642 }
 643
 644 static int ag71xx_stop(struct net_device *dev)
 645 {
 646         struct ag71xx *ag = netdev_priv(dev);
 647         unsigned long flags;
 648
 649         netif_carrier_off(dev);
 650         ag71xx_phy_stop(ag);
 651
 652         spin_lock_irqsave(&ag->lock, flags);
 653
 654         netif_stop_queue(dev);
 655
 656         ag71xx_hw_stop(ag);
 657         ag71xx_dma_reset(ag);
 658
 659         napi_disable(&ag->napi);
 660         del_timer_sync(&ag->oom_timer);
 661
 662         spin_unlock_irqrestore(&ag->lock, flags);
 663
 664         ag71xx_rings_cleanup(ag);
 665
 666         return 0;
 667 }
 668
 669 static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
 670                                           struct net_device *dev)
 671 {
 672         struct ag71xx *ag = netdev_priv(dev);
 673         struct ag71xx_ring *ring = &ag->tx_ring;
 674         struct ag71xx_desc *desc;
 675         dma_addr_t dma_addr;
 676         int i;
 677
 678         i = ring->curr % ring->size;
 679         desc = ring->buf[i].desc;
 680
 681         if (!ag71xx_desc_empty(desc))
 682                 goto err_drop;
 683
 684         if (ag71xx_has_ar8216(ag))
 685                 ag71xx_add_ar8216_header(ag, skb);
 686
 687         if (skb->len <= 0) {
 688                 DBG("%s: packet len is too small\n", ag->dev->name);
 689                 goto err_drop;
 690         }
 691
 692         dma_addr = dma_map_single(&dev->dev, skb->data, skb->len,
 693                                   DMA_TO_DEVICE);
 694
 695         ring->buf[i].skb = skb;
 696         ring->buf[i].timestamp = jiffies;
 697
 698         /* setup descriptor fields */
 699         desc->data = (u32) dma_addr;
 700         desc->ctrl = (skb->len & DESC_PKTLEN_M);
 701
 702         /* flush descriptor */
 703         wmb();
 704
 705         ring->curr++;
 706         if (ring->curr == (ring->dirty + ring->size)) {
 707                 DBG("%s: tx queue full\n", ag->dev->name);
 708                 netif_stop_queue(dev);
 709         }
 710
 711         DBG("%s: packet injected into TX queue\n", ag->dev->name);
 712
 713         /* enable TX engine */
 714         ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE);
 715
 716         return NETDEV_TX_OK;
 717
 718 err_drop:
 719         dev->stats.tx_dropped++;
 720
 721         dev_kfree_skb(skb);
 722         return NETDEV_TX_OK;
 723 }
 724
 725 static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 726 {
 727         struct ag71xx *ag = netdev_priv(dev);
 728         int ret;
 729
 730         switch (cmd) {
 731         case SIOCETHTOOL:
 732                 if (ag->phy_dev == NULL)
 733                         break;
 734
 735                 spin_lock_irq(&ag->lock);
 736                 ret = phy_ethtool_ioctl(ag->phy_dev, (void *) ifr->ifr_data);
 737                 spin_unlock_irq(&ag->lock);
 738                 return ret;
 739
 740         case SIOCSIFHWADDR:
 741                 if (copy_from_user
 742                         (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr)))
 743                         return -EFAULT;
 744                 return 0;
 745
 746         case SIOCGIFHWADDR:
 747                 if (copy_to_user
 748                         (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr)))
 749                         return -EFAULT;
 750                 return 0;
 751
 752         case SIOCGMIIPHY:
 753         case SIOCGMIIREG:
 754         case SIOCSMIIREG:
 755                 if (ag->phy_dev == NULL)
 756                         break;
 757
 758                 return phy_mii_ioctl(ag->phy_dev, ifr, cmd);
 759
 760         default:
 761                 break;
 762         }
 763
 764         return -EOPNOTSUPP;
 765 }
 766
 767 static void ag71xx_oom_timer_handler(unsigned long data)
 768 {
 769         struct net_device *dev = (struct net_device *) data;
 770         struct ag71xx *ag = netdev_priv(dev);
 771
 772         napi_schedule(&ag->napi);
 773 }
 774
 775 static void ag71xx_tx_timeout(struct net_device *dev)
 776 {
 777         struct ag71xx *ag = netdev_priv(dev);
 778
 779         if (netif_msg_tx_err(ag))
 780                 printk(KERN_DEBUG "%s: tx timeout\n", ag->dev->name);
 781
 782         schedule_work(&ag->restart_work);
 783 }
 784
 785 static void ag71xx_restart_work_func(struct work_struct *work)
 786 {
 787         struct ag71xx *ag = container_of(work, struct ag71xx, restart_work);
 788
 789         if (ag71xx_get_pdata(ag)->is_ar724x) {
 790                 ag->link = 0;
 791                 ag71xx_link_adjust(ag);
 792                 return;
 793         }
 794
 795         ag71xx_stop(ag->dev);
 796         ag71xx_open(ag->dev);
 797 }
 798
 799 static bool ag71xx_check_dma_stuck(struct ag71xx *ag, unsigned long timestamp)
 800 {
 801         u32 rx_sm, tx_sm, rx_fd;
 802
 803         if (likely(time_before(jiffies, timestamp + HZ/10)))
 804                 return false;
 805
 806         if (!netif_carrier_ok(ag->dev))
 807                 return false;
 808
 809         rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM);
 810         if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6)
 811                 return true;
 812
 813         tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM);
 814         rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH);
 815         if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) &&
 816             ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0)
 817                 return true;
 818
 819         return false;
 820 }
 821
 822 static int ag71xx_tx_packets(struct ag71xx *ag)
 823 {
 824         struct ag71xx_ring *ring = &ag->tx_ring;
 825         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 826         int sent;
 827
 828         DBG("%s: processing TX ring\n", ag->dev->name);
 829
 830         sent = 0;
 831         while (ring->dirty != ring->curr) {
 832                 unsigned int i = ring->dirty % ring->size;
 833                 struct ag71xx_desc *desc = ring->buf[i].desc;
 834                 struct sk_buff *skb = ring->buf[i].skb;
 835
 836                 if (!ag71xx_desc_empty(desc)) {
 837                         if (pdata->is_ar7240 &&
 838                             ag71xx_check_dma_stuck(ag, ring->buf[i].timestamp))
 839                                 schedule_work(&ag->restart_work);
 840                         break;
 841                 }
 842
 843                 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
 844
 845                 ag->dev->stats.tx_bytes += skb->len;
 846                 ag->dev->stats.tx_packets++;
 847
 848                 dev_kfree_skb_any(skb);
 849                 ring->buf[i].skb = NULL;
 850
 851                 ring->dirty++;
 852                 sent++;
 853         }
 854
 855         DBG("%s: %d packets sent out\n", ag->dev->name, sent);
 856
 857         if ((ring->curr - ring->dirty) < (ring->size * 3) / 4)
 858                 netif_wake_queue(ag->dev);
 859
 860         return sent;
 861 }
 862
 863 static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
 864 {
 865         struct net_device *dev = ag->dev;
 866         struct ag71xx_ring *ring = &ag->rx_ring;
 867         int done = 0;
 868
 869         DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
 870                         dev->name, limit, ring->curr, ring->dirty);
 871
 872         while (done < limit) {
 873                 unsigned int i = ring->curr % ring->size;
 874                 struct ag71xx_desc *desc = ring->buf[i].desc;
 875                 struct sk_buff *skb;
 876                 int pktlen;
 877                 int err = 0;
 878
 879                 if (ag71xx_desc_empty(desc))
 880                         break;
 881
 882                 if ((ring->dirty + ring->size) == ring->curr) {
 883                         ag71xx_assert(0);
 884                         break;
 885                 }
 886
 887                 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
 888
 889                 skb = ring->buf[i].skb;
 890                 pktlen = ag71xx_desc_pktlen(desc);
 891                 pktlen -= ETH_FCS_LEN;
 892
 893                 dma_unmap_single(&dev->dev, ring->buf[i].dma_addr,
 894                                  AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE);
 895
 896                 dev->last_rx = jiffies;
 897                 dev->stats.rx_packets++;
 898                 dev->stats.rx_bytes += pktlen;
 899
 900                 skb_put(skb, pktlen);
 901                 if (ag71xx_has_ar8216(ag))
 902                         err = ag71xx_remove_ar8216_header(ag, skb, pktlen);
 903
 904                 if (err) {
 905                         dev->stats.rx_dropped++;
 906                         kfree_skb(skb);
 907                 } else {
 908                         skb->dev = dev;
 909                         skb->ip_summed = CHECKSUM_NONE;
 910                         if (ag->phy_dev) {
 911                                 ag->phy_dev->netif_receive_skb(skb);
 912                         } else {
 913                                 skb->protocol = eth_type_trans(skb, dev);
 914                                 netif_receive_skb(skb);
 915                         }
 916                 }
 917
 918                 ring->buf[i].skb = NULL;
 919                 done++;
 920
 921                 ring->curr++;
 922         }
 923
 924         ag71xx_ring_rx_refill(ag);
 925
 926         DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n",
 927                 dev->name, ring->curr, ring->dirty, done);
 928
 929         return done;
 930 }
 931
 932 static int ag71xx_poll(struct napi_struct *napi, int limit)
 933 {
 934         struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
 935         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 936         struct net_device *dev = ag->dev;
 937         struct ag71xx_ring *rx_ring;
 938         unsigned long flags;
 939         u32 status;
 940         int tx_done;
 941         int rx_done;
 942
 943         pdata->ddr_flush();
 944         tx_done = ag71xx_tx_packets(ag);
 945
 946         DBG("%s: processing RX ring\n", dev->name);
 947         rx_done = ag71xx_rx_packets(ag, limit);
 948
 949         ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done);
 950
 951         rx_ring = &ag->rx_ring;
 952         if (rx_ring->buf[rx_ring->dirty % rx_ring->size].skb == NULL)
 953                 goto oom;
 954
 955         status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
 956         if (unlikely(status & RX_STATUS_OF)) {
 957                 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
 958                 dev->stats.rx_fifo_errors++;
 959
 960                 /* restart RX */
 961                 ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
 962         }
 963
 964         if (rx_done < limit) {
 965                 if (status & RX_STATUS_PR)
 966                         goto more;
 967
 968                 status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
 969                 if (status & TX_STATUS_PS)
 970                         goto more;
 971
 972                 DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n",
 973                         dev->name, rx_done, tx_done, limit);
 974
 975                 napi_complete(napi);
 976
 977                 /* enable interrupts */
 978                 spin_lock_irqsave(&ag->lock, flags);
 979                 ag71xx_int_enable(ag, AG71XX_INT_POLL);
 980                 spin_unlock_irqrestore(&ag->lock, flags);
 981                 return rx_done;
 982         }
 983
 984 more:
 985         DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n",
 986                         dev->name, rx_done, tx_done, limit);
 987         return rx_done;
 988
 989 oom:
 990         if (netif_msg_rx_err(ag))
 991                 printk(KERN_DEBUG "%s: out of memory\n", dev->name);
 992
 993         mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
 994         napi_complete(napi);
 995         return 0;
 996 }
 997
 998 static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
 999 {
1000         struct net_device *dev = dev_id;
1001         struct ag71xx *ag = netdev_priv(dev);
1002         u32 status;
1003
1004         status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
1005         ag71xx_dump_intr(ag, "raw", status);
1006
1007         if (unlikely(!status))
1008                 return IRQ_NONE;
1009
1010         if (unlikely(status & AG71XX_INT_ERR)) {
1011                 if (status & AG71XX_INT_TX_BE) {
1012                         ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE);
1013                         dev_err(&dev->dev, "TX BUS error\n");
1014                 }
1015                 if (status & AG71XX_INT_RX_BE) {
1016                         ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE);
1017                         dev_err(&dev->dev, "RX BUS error\n");
1018                 }
1019         }
1020
1021         if (likely(status & AG71XX_INT_POLL)) {
1022                 ag71xx_int_disable(ag, AG71XX_INT_POLL);
1023                 DBG("%s: enable polling mode\n", dev->name);
1024                 napi_schedule(&ag->napi);
1025         }
1026
1027         ag71xx_debugfs_update_int_stats(ag, status);
1028
1029         return IRQ_HANDLED;
1030 }
1031
1032 static void ag71xx_set_multicast_list(struct net_device *dev)
1033 {
1034         /* TODO */
1035 }
1036
1037 #ifdef CONFIG_NET_POLL_CONTROLLER
1038 /*
1039  * Polling 'interrupt' - used by things like netconsole to send skbs
1040  * without having to re-enable interrupts. It's not called while
1041  * the interrupt routine is executing.
1042  */
1043 static void ag71xx_netpoll(struct net_device *dev)
1044 {
1045         disable_irq(dev->irq);
1046         ag71xx_interrupt(dev->irq, dev);
1047         enable_irq(dev->irq);
1048 }
1049 #endif
1050
1051 static const struct net_device_ops ag71xx_netdev_ops = {
1052         .ndo_open               = ag71xx_open,
1053         .ndo_stop               = ag71xx_stop,
1054         .ndo_start_xmit         = ag71xx_hard_start_xmit,
1055         .ndo_set_multicast_list = ag71xx_set_multicast_list,
1056         .ndo_do_ioctl           = ag71xx_do_ioctl,
1057         .ndo_tx_timeout         = ag71xx_tx_timeout,
1058         .ndo_change_mtu         = eth_change_mtu,
1059         .ndo_set_mac_address    = eth_mac_addr,
1060         .ndo_validate_addr      = eth_validate_addr,
1061 #ifdef CONFIG_NET_POLL_CONTROLLER
1062         .ndo_poll_controller    = ag71xx_netpoll,
1063 #endif
1064 };
1065
1066 static int __devinit ag71xx_probe(struct platform_device *pdev)
1067 {
1068         struct net_device *dev;
1069         struct resource *res;
1070         struct ag71xx *ag;
1071         struct ag71xx_platform_data *pdata;
1072         int err;
1073
1074         pdata = pdev->dev.platform_data;
1075         if (!pdata) {
1076                 dev_err(&pdev->dev, "no platform data specified\n");
1077                 err = -ENXIO;
1078                 goto err_out;
1079         }
1080
1081         if (pdata->mii_bus_dev == NULL) {
1082                 dev_err(&pdev->dev, "no MII bus device specified\n");
1083                 err = -EINVAL;
1084                 goto err_out;
1085         }
1086
1087         dev = alloc_etherdev(sizeof(*ag));
1088         if (!dev) {
1089                 dev_err(&pdev->dev, "alloc_etherdev failed\n");
1090                 err = -ENOMEM;
1091                 goto err_out;
1092         }
1093
1094         SET_NETDEV_DEV(dev, &pdev->dev);
1095
1096         ag = netdev_priv(dev);
1097         ag->pdev = pdev;
1098         ag->dev = dev;
1099         ag->msg_enable = netif_msg_init(ag71xx_msg_level,
1100                                         AG71XX_DEFAULT_MSG_ENABLE);
1101         spin_lock_init(&ag->lock);
1102
1103         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac_base");
1104         if (!res) {
1105                 dev_err(&pdev->dev, "no mac_base resource found\n");
1106                 err = -ENXIO;
1107                 goto err_out;
1108         }
1109
1110         ag->mac_base = ioremap_nocache(res->start, res->end - res->start + 1);
1111         if (!ag->mac_base) {
1112                 dev_err(&pdev->dev, "unable to ioremap mac_base\n");
1113                 err = -ENOMEM;
1114                 goto err_free_dev;
1115         }
1116
1117         dev->irq = platform_get_irq(pdev, 0);
1118         err = request_irq(dev->irq, ag71xx_interrupt,
1119                           IRQF_DISABLED,
1120                           dev->name, dev);
1121         if (err) {
1122                 dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq);
1123                 goto err_unmap_base;
1124         }
1125
1126         dev->base_addr = (unsigned long)ag->mac_base;
1127         dev->netdev_ops = &ag71xx_netdev_ops;
1128         dev->ethtool_ops = &ag71xx_ethtool_ops;
1129
1130         INIT_WORK(&ag->restart_work, ag71xx_restart_work_func);
1131
1132         init_timer(&ag->oom_timer);
1133         ag->oom_timer.data = (unsigned long) dev;
1134         ag->oom_timer.function = ag71xx_oom_timer_handler;
1135
1136         ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT;
1137         ag->rx_ring.size = AG71XX_RX_RING_SIZE_DEFAULT;
1138
1139         ag->stop_desc = dma_alloc_coherent(NULL,
1140                 sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL);
1141
1142         if (!ag->stop_desc)
1143                 goto err_free_irq;
1144
1145         ag->stop_desc->data = 0;
1146         ag->stop_desc->ctrl = 0;
1147         ag->stop_desc->next = (u32) ag->stop_desc_dma;
1148
1149         memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
1150
1151         netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
1152
1153         err = register_netdev(dev);
1154         if (err) {
1155                 dev_err(&pdev->dev, "unable to register net device\n");
1156                 goto err_free_desc;
1157         }
1158
1159         printk(KERN_INFO "%s: Atheros AG71xx at 0x%08lx, irq %d\n",
1160                dev->name, dev->base_addr, dev->irq);
1161
1162         ag71xx_dump_regs(ag);
1163
1164         ag71xx_hw_init(ag);
1165
1166         ag71xx_dump_regs(ag);
1167
1168         err = ag71xx_phy_connect(ag);
1169         if (err)
1170                 goto err_unregister_netdev;
1171
1172         err = ag71xx_debugfs_init(ag);
1173         if (err)
1174                 goto err_phy_disconnect;
1175
1176         platform_set_drvdata(pdev, dev);
1177
1178         return 0;
1179
1180 err_phy_disconnect:
1181         ag71xx_phy_disconnect(ag);
1182 err_unregister_netdev:
1183         unregister_netdev(dev);
1184 err_free_desc:
1185         dma_free_coherent(NULL, sizeof(struct ag71xx_desc), ag->stop_desc,
1186                           ag->stop_desc_dma);
1187 err_free_irq:
1188         free_irq(dev->irq, dev);
1189 err_unmap_base:
1190         iounmap(ag->mac_base);
1191 err_free_dev:
1192         kfree(dev);
1193 err_out:
1194         platform_set_drvdata(pdev, NULL);
1195         return err;
1196 }
1197
1198 static int __devexit ag71xx_remove(struct platform_device *pdev)
1199 {
1200         struct net_device *dev = platform_get_drvdata(pdev);
1201
1202         if (dev) {
1203                 struct ag71xx *ag = netdev_priv(dev);
1204
1205                 ag71xx_debugfs_exit(ag);
1206                 ag71xx_phy_disconnect(ag);
1207                 unregister_netdev(dev);
1208                 free_irq(dev->irq, dev);
1209                 iounmap(ag->mac_base);
1210                 kfree(dev);
1211                 platform_set_drvdata(pdev, NULL);
1212         }
1213
1214         return 0;
1215 }
1216
1217 static struct platform_driver ag71xx_driver = {
1218         .probe          = ag71xx_probe,
1219         .remove         = __exit_p(ag71xx_remove),
1220         .driver = {
1221                 .name   = AG71XX_DRV_NAME,
1222         }
1223 };
1224
1225 static int __init ag71xx_module_init(void)
1226 {
1227         int ret;
1228
1229         ret = ag71xx_debugfs_root_init();
1230         if (ret)
1231                 goto err_out;
1232
1233         ret = ag71xx_mdio_driver_init();
1234         if (ret)
1235                 goto err_debugfs_exit;
1236
1237         ret = platform_driver_register(&ag71xx_driver);
1238         if (ret)
1239                 goto err_mdio_exit;
1240
1241         return 0;
1242
1243 err_mdio_exit:
1244         ag71xx_mdio_driver_exit();
1245 err_debugfs_exit:
1246         ag71xx_debugfs_root_exit();
1247 err_out:
1248         return ret;
1249 }
1250
1251 static void __exit ag71xx_module_exit(void)
1252 {
1253         platform_driver_unregister(&ag71xx_driver);
1254         ag71xx_mdio_driver_exit();
1255         ag71xx_debugfs_root_exit();
1256 }
1257
1258 module_init(ag71xx_module_init);
1259 module_exit(ag71xx_module_exit);
1260
1261 MODULE_VERSION(AG71XX_DRV_VERSION);
1262 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1263 MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
1264 MODULE_LICENSE("GPL v2");
1265 MODULE_ALIAS("platform:" AG71XX_DRV_NAME);