drivers/net/cpmac.c

   1 /*
   2  * Copyright (C) 2006, 2007 Eugene Konev
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/moduleparam.h>
  22
  23 #include <linux/sched.h>
  24 #include <linux/kernel.h>
  25 #include <linux/slab.h>
  26 #include <linux/errno.h>
  27 #include <linux/types.h>
  28 #include <linux/delay.h>
  29 #include <linux/version.h>
  30
  31 #include <linux/netdevice.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/mii.h>
  36 #include <linux/phy.h>
  37 #include <linux/phy_fixed.h>
  38 #include <linux/platform_device.h>
  39 #include <linux/dma-mapping.h>
  40 #include <asm/gpio.h>
  41
  42 MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>");
  43 MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)");
  44 MODULE_LICENSE("GPL");
  45
  46 static int debug_level = 8;
  47 static int dumb_switch;
  48
  49 /* Next 2 are only used in cpmac_probe, so it's pointless to change them */
  50 module_param(debug_level, int, 0444);
  51 module_param(dumb_switch, int, 0444);
  52
  53 MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable");
  54 MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus");
  55
  56 #define CPMAC_VERSION "0.5.0"
  57 /* frame size + 802.1q tag */
  58 #define CPMAC_SKB_SIZE          (ETH_FRAME_LEN + 4)
  59 #define CPMAC_QUEUES    8
  60
  61 /* Ethernet registers */
  62 #define CPMAC_TX_CONTROL                0x0004
  63 #define CPMAC_TX_TEARDOWN               0x0008
  64 #define CPMAC_RX_CONTROL                0x0014
  65 #define CPMAC_RX_TEARDOWN               0x0018
  66 #define CPMAC_MBP                       0x0100
  67 # define MBP_RXPASSCRC                  0x40000000
  68 # define MBP_RXQOS                      0x20000000
  69 # define MBP_RXNOCHAIN                  0x10000000
  70 # define MBP_RXCMF                      0x01000000
  71 # define MBP_RXSHORT                    0x00800000
  72 # define MBP_RXCEF                      0x00400000
  73 # define MBP_RXPROMISC                  0x00200000
  74 # define MBP_PROMISCCHAN(channel)       (((channel) & 0x7) << 16)
  75 # define MBP_RXBCAST                    0x00002000
  76 # define MBP_BCASTCHAN(channel)         (((channel) & 0x7) << 8)
  77 # define MBP_RXMCAST                    0x00000020
  78 # define MBP_MCASTCHAN(channel)         ((channel) & 0x7)
  79 #define CPMAC_UNICAST_ENABLE            0x0104
  80 #define CPMAC_UNICAST_CLEAR             0x0108
  81 #define CPMAC_MAX_LENGTH                0x010c
  82 #define CPMAC_BUFFER_OFFSET             0x0110
  83 #define CPMAC_MAC_CONTROL               0x0160
  84 # define MAC_TXPTYPE                    0x00000200
  85 # define MAC_TXPACE                     0x00000040
  86 # define MAC_MII                        0x00000020
  87 # define MAC_TXFLOW                     0x00000010
  88 # define MAC_RXFLOW                     0x00000008
  89 # define MAC_MTEST                      0x00000004
  90 # define MAC_LOOPBACK                   0x00000002
  91 # define MAC_FDX                        0x00000001
  92 #define CPMAC_MAC_STATUS                0x0164
  93 # define MAC_STATUS_QOS                 0x00000004
  94 # define MAC_STATUS_RXFLOW              0x00000002
  95 # define MAC_STATUS_TXFLOW              0x00000001
  96 #define CPMAC_TX_INT_ENABLE             0x0178
  97 #define CPMAC_TX_INT_CLEAR              0x017c
  98 #define CPMAC_MAC_INT_VECTOR            0x0180
  99 # define MAC_INT_STATUS                 0x00080000
 100 # define MAC_INT_HOST                   0x00040000
 101 # define MAC_INT_RX                     0x00020000
 102 # define MAC_INT_TX                     0x00010000
 103 #define CPMAC_MAC_EOI_VECTOR            0x0184
 104 #define CPMAC_RX_INT_ENABLE             0x0198
 105 #define CPMAC_RX_INT_CLEAR              0x019c
 106 #define CPMAC_MAC_INT_ENABLE            0x01a8
 107 #define CPMAC_MAC_INT_CLEAR             0x01ac
 108 #define CPMAC_MAC_ADDR_LO(channel)      (0x01b0 + (channel) * 4)
 109 #define CPMAC_MAC_ADDR_MID              0x01d0
 110 #define CPMAC_MAC_ADDR_HI               0x01d4
 111 #define CPMAC_MAC_HASH_LO               0x01d8
 112 #define CPMAC_MAC_HASH_HI               0x01dc
 113 #define CPMAC_TX_PTR(channel)           (0x0600 + (channel) * 4)
 114 #define CPMAC_RX_PTR(channel)           (0x0620 + (channel) * 4)
 115 #define CPMAC_TX_ACK(channel)           (0x0640 + (channel) * 4)
 116 #define CPMAC_RX_ACK(channel)           (0x0660 + (channel) * 4)
 117 #define CPMAC_REG_END                   0x0680
 118 /*
 119  * Rx/Tx statistics
 120  * TODO: use some of them to fill stats in cpmac_stats()
 121  */
 122 #define CPMAC_STATS_RX_GOOD             0x0200
 123 #define CPMAC_STATS_RX_BCAST            0x0204
 124 #define CPMAC_STATS_RX_MCAST            0x0208
 125 #define CPMAC_STATS_RX_PAUSE            0x020c
 126 #define CPMAC_STATS_RX_CRC              0x0210
 127 #define CPMAC_STATS_RX_ALIGN            0x0214
 128 #define CPMAC_STATS_RX_OVER             0x0218
 129 #define CPMAC_STATS_RX_JABBER           0x021c
 130 #define CPMAC_STATS_RX_UNDER            0x0220
 131 #define CPMAC_STATS_RX_FRAG             0x0224
 132 #define CPMAC_STATS_RX_FILTER           0x0228
 133 #define CPMAC_STATS_RX_QOSFILTER        0x022c
 134 #define CPMAC_STATS_RX_OCTETS           0x0230
 135
 136 #define CPMAC_STATS_TX_GOOD             0x0234
 137 #define CPMAC_STATS_TX_BCAST            0x0238
 138 #define CPMAC_STATS_TX_MCAST            0x023c
 139 #define CPMAC_STATS_TX_PAUSE            0x0240
 140 #define CPMAC_STATS_TX_DEFER            0x0244
 141 #define CPMAC_STATS_TX_COLLISION        0x0248
 142 #define CPMAC_STATS_TX_SINGLECOLL       0x024c
 143 #define CPMAC_STATS_TX_MULTICOLL        0x0250
 144 #define CPMAC_STATS_TX_EXCESSCOLL       0x0254
 145 #define CPMAC_STATS_TX_LATECOLL         0x0258
 146 #define CPMAC_STATS_TX_UNDERRUN         0x025c
 147 #define CPMAC_STATS_TX_CARRIERSENSE     0x0260
 148 #define CPMAC_STATS_TX_OCTETS           0x0264
 149
 150 #define cpmac_read(base, reg)           (readl((void __iomem *)(base) + (reg)))
 151 #define cpmac_write(base, reg, val)     (writel(val, (void __iomem *)(base) + \
 152                                                 (reg)))
 153
 154 /* MDIO bus */
 155 #define CPMAC_MDIO_VERSION              0x0000
 156 #define CPMAC_MDIO_CONTROL              0x0004
 157 # define MDIOC_IDLE                     0x80000000
 158 # define MDIOC_ENABLE                   0x40000000
 159 # define MDIOC_PREAMBLE                 0x00100000
 160 # define MDIOC_FAULT                    0x00080000
 161 # define MDIOC_FAULTDETECT              0x00040000
 162 # define MDIOC_INTTEST                  0x00020000
 163 # define MDIOC_CLKDIV(div)              ((div) & 0xff)
 164 #define CPMAC_MDIO_ALIVE                0x0008
 165 #define CPMAC_MDIO_LINK                 0x000c
 166 #define CPMAC_MDIO_ACCESS(channel)      (0x0080 + (channel) * 8)
 167 # define MDIO_BUSY                      0x80000000
 168 # define MDIO_WRITE                     0x40000000
 169 # define MDIO_REG(reg)                  (((reg) & 0x1f) << 21)
 170 # define MDIO_PHY(phy)                  (((phy) & 0x1f) << 16)
 171 # define MDIO_DATA(data)                ((data) & 0xffff)
 172 #define CPMAC_MDIO_PHYSEL(channel)      (0x0084 + (channel) * 8)
 173 # define PHYSEL_LINKSEL                 0x00000040
 174 # define PHYSEL_LINKINT                 0x00000020
 175
 176 struct cpmac_desc {
 177         u32 hw_next;
 178         u32 hw_data;
 179         u16 buflen;
 180         u16 bufflags;
 181         u16 datalen;
 182         u16 dataflags;
 183 #define CPMAC_SOP                       0x8000
 184 #define CPMAC_EOP                       0x4000
 185 #define CPMAC_OWN                       0x2000
 186 #define CPMAC_EOQ                       0x1000
 187         struct sk_buff *skb;
 188         struct cpmac_desc *next;
 189         dma_addr_t mapping;
 190         dma_addr_t data_mapping;
 191 };
 192
 193 struct cpmac_priv {
 194         spinlock_t lock;
 195         spinlock_t rx_lock;
 196         struct cpmac_desc *rx_head;
 197         int ring_size;
 198         struct cpmac_desc *desc_ring;
 199         dma_addr_t dma_ring;
 200         void __iomem *regs;
 201         struct mii_bus *mii_bus;
 202         struct phy_device *phy;
 203         char phy_name[BUS_ID_SIZE];
 204         int oldlink, oldspeed, oldduplex;
 205         u32 msg_enable;
 206         struct net_device *dev;
 207         struct work_struct reset_work;
 208         struct platform_device *pdev;
 209         struct napi_struct napi;
 210 };
 211
 212 static irqreturn_t cpmac_irq(int, void *);
 213 static void cpmac_hw_start(struct net_device *dev);
 214 static void cpmac_hw_stop(struct net_device *dev);
 215 static int cpmac_stop(struct net_device *dev);
 216 static int cpmac_open(struct net_device *dev);
 217
 218 static void cpmac_dump_regs(struct net_device *dev)
 219 {
 220         int i;
 221         struct cpmac_priv *priv = netdev_priv(dev);
 222         for (i = 0; i < CPMAC_REG_END; i += 4) {
 223                 if (i % 16 == 0) {
 224                         if (i)
 225                                 printk("\n");
 226                         printk(KERN_DEBUG "%s: reg[%p]:", dev->name,
 227                                priv->regs + i);
 228                 }
 229                 printk(" %08x", cpmac_read(priv->regs, i));
 230         }
 231         printk("\n");
 232 }
 233
 234 static void cpmac_dump_desc(struct net_device *dev, struct cpmac_desc *desc)
 235 {
 236         int i;
 237         printk(KERN_DEBUG "%s: desc[%p]:", dev->name, desc);
 238         for (i = 0; i < sizeof(*desc) / 4; i++)
 239                 printk(" %08x", ((u32 *)desc)[i]);
 240         printk("\n");
 241 }
 242
 243 static void cpmac_dump_skb(struct net_device *dev, struct sk_buff *skb)
 244 {
 245         int i;
 246         printk(KERN_DEBUG "%s: skb 0x%p, len=%d\n", dev->name, skb, skb->len);
 247         for (i = 0; i < skb->len; i++) {
 248                 if (i % 16 == 0) {
 249                         if (i)
 250                                 printk("\n");
 251                         printk(KERN_DEBUG "%s: data[%p]:", dev->name,
 252                                skb->data + i);
 253                 }
 254                 printk(" %02x", ((u8 *)skb->data)[i]);
 255         }
 256         printk("\n");
 257 }
 258
 259 static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
 260 {
 261         u32 val;
 262
 263         while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
 264                 cpu_relax();
 265         cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_REG(reg) |
 266                     MDIO_PHY(phy_id));
 267         while ((val = cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0))) & MDIO_BUSY)
 268                 cpu_relax();
 269         return MDIO_DATA(val);
 270 }
 271
 272 static int cpmac_mdio_write(struct mii_bus *bus, int phy_id,
 273                             int reg, u16 val)
 274 {
 275         while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
 276                 cpu_relax();
 277         cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_WRITE |
 278                     MDIO_REG(reg) | MDIO_PHY(phy_id) | MDIO_DATA(val));
 279         return 0;
 280 }
 281
 282 static int cpmac_mdio_reset(struct mii_bus *bus)
 283 {
 284         ar7_device_reset(AR7_RESET_BIT_MDIO);
 285         cpmac_write(bus->priv, CPMAC_MDIO_CONTROL, MDIOC_ENABLE |
 286                     MDIOC_CLKDIV(ar7_cpmac_freq() / 2200000 - 1));
 287         return 0;
 288 }
 289
 290 static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, };
 291
 292 static struct mii_bus cpmac_mii = {
 293         .name = "cpmac-mii",
 294         .read = cpmac_mdio_read,
 295         .write = cpmac_mdio_write,
 296         .reset = cpmac_mdio_reset,
 297         .irq = mii_irqs,
 298 };
 299
 300 static int cpmac_config(struct net_device *dev, struct ifmap *map)
 301 {
 302         if (dev->flags & IFF_UP)
 303                 return -EBUSY;
 304
 305         /* Don't allow changing the I/O address */
 306         if (map->base_addr != dev->base_addr)
 307                 return -EOPNOTSUPP;
 308
 309         /* ignore other fields */
 310         return 0;
 311 }
 312
 313 static void cpmac_set_multicast_list(struct net_device *dev)
 314 {
 315         struct dev_mc_list *iter;
 316         int i;
 317         u8 tmp;
 318         u32 mbp, bit, hash[2] = { 0, };
 319         struct cpmac_priv *priv = netdev_priv(dev);
 320
 321         mbp = cpmac_read(priv->regs, CPMAC_MBP);
 322         if (dev->flags & IFF_PROMISC) {
 323                 cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) |
 324                             MBP_RXPROMISC);
 325         } else {
 326                 cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC);
 327                 if (dev->flags & IFF_ALLMULTI) {
 328                         /* enable all multicast mode */
 329                         cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff);
 330                         cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff);
 331                 } else {
 332                         /*
 333                          * cpmac uses some strange mac address hashing
 334                          * (not crc32)
 335                          */
 336                         for (i = 0, iter = dev->mc_list; i < dev->mc_count;
 337                              i++, iter = iter->next) {
 338                                 bit = 0;
 339                                 tmp = iter->dmi_addr[0];
 340                                 bit  ^= (tmp >> 2) ^ (tmp << 4);
 341                                 tmp = iter->dmi_addr[1];
 342                                 bit  ^= (tmp >> 4) ^ (tmp << 2);
 343                                 tmp = iter->dmi_addr[2];
 344                                 bit  ^= (tmp >> 6) ^ tmp;
 345                                 tmp = iter->dmi_addr[3];
 346                                 bit  ^= (tmp >> 2) ^ (tmp << 4);
 347                                 tmp = iter->dmi_addr[4];
 348                                 bit  ^= (tmp >> 4) ^ (tmp << 2);
 349                                 tmp = iter->dmi_addr[5];
 350                                 bit  ^= (tmp >> 6) ^ tmp;
 351                                 bit &= 0x3f;
 352                                 hash[bit / 32] |= 1 << (bit % 32);
 353                         }
 354
 355                         cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]);
 356                         cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]);
 357                 }
 358         }
 359 }
 360
 361 static struct sk_buff *cpmac_rx_one(struct cpmac_priv *priv,
 362                                     struct cpmac_desc *desc)
 363 {
 364         struct sk_buff *skb, *result = NULL;
 365
 366         if (unlikely(netif_msg_hw(priv)))
 367                 cpmac_dump_desc(priv->dev, desc);
 368         cpmac_write(priv->regs, CPMAC_RX_ACK(0), (u32)desc->mapping);
 369         if (unlikely(!desc->datalen)) {
 370                 if (netif_msg_rx_err(priv) && net_ratelimit())
 371                         printk(KERN_WARNING "%s: rx: spurious interrupt\n",
 372                                priv->dev->name);
 373                 return NULL;
 374         }
 375
 376         skb = netdev_alloc_skb(priv->dev, CPMAC_SKB_SIZE);
 377         if (likely(skb)) {
 378                 skb_reserve(skb, 2);
 379                 skb_put(desc->skb, desc->datalen);
 380                 desc->skb->protocol = eth_type_trans(desc->skb, priv->dev);
 381                 desc->skb->ip_summed = CHECKSUM_NONE;
 382                 priv->dev->stats.rx_packets++;
 383                 priv->dev->stats.rx_bytes += desc->datalen;
 384                 result = desc->skb;
 385                 dma_unmap_single(&priv->dev->dev, desc->data_mapping,
 386                                  CPMAC_SKB_SIZE, DMA_FROM_DEVICE);
 387                 desc->skb = skb;
 388                 desc->data_mapping = dma_map_single(&priv->dev->dev, skb->data,
 389                                                     CPMAC_SKB_SIZE,
 390                                                     DMA_FROM_DEVICE);
 391                 desc->hw_data = (u32)desc->data_mapping;
 392                 if (unlikely(netif_msg_pktdata(priv))) {
 393                         printk(KERN_DEBUG "%s: received packet:\n",
 394                                priv->dev->name);
 395                         cpmac_dump_skb(priv->dev, result);
 396                 }
 397         } else {
 398                 if (netif_msg_rx_err(priv) && net_ratelimit())
 399                         printk(KERN_WARNING
 400                                "%s: low on skbs, dropping packet\n",
 401                                priv->dev->name);
 402                 priv->dev->stats.rx_dropped++;
 403         }
 404
 405         desc->buflen = CPMAC_SKB_SIZE;
 406         desc->dataflags = CPMAC_OWN;
 407
 408         return result;
 409 }
 410
 411 static int cpmac_poll(struct napi_struct *napi, int budget)
 412 {
 413         struct sk_buff *skb;
 414         struct cpmac_desc *desc;
 415         int received = 0;
 416         struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi);
 417
 418         spin_lock(&priv->rx_lock);
 419         if (unlikely(!priv->rx_head)) {
 420                 if (netif_msg_rx_err(priv) && net_ratelimit())
 421                         printk(KERN_WARNING "%s: rx: polling, but no queue\n",
 422                                priv->dev->name);
 423                 netif_rx_complete(priv->dev, napi);
 424                 return 0;
 425         }
 426
 427         desc = priv->rx_head;
 428         while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) {
 429                 skb = cpmac_rx_one(priv, desc);
 430                 if (likely(skb)) {
 431                         netif_receive_skb(skb);
 432                         received++;
 433                 }
 434                 desc = desc->next;
 435         }
 436
 437         priv->rx_head = desc;
 438         spin_unlock(&priv->rx_lock);
 439         if (unlikely(netif_msg_rx_status(priv)))
 440                 printk(KERN_DEBUG "%s: poll processed %d packets\n",
 441                        priv->dev->name, received);
 442         if (desc->dataflags & CPMAC_OWN) {
 443                 netif_rx_complete(priv->dev, napi);
 444                 cpmac_write(priv->regs, CPMAC_RX_PTR(0), (u32)desc->mapping);
 445                 cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
 446                 return 0;
 447         }
 448
 449         return 1;
 450 }
 451
 452 static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 453 {
 454         int queue, len;
 455         struct cpmac_desc *desc;
 456         struct cpmac_priv *priv = netdev_priv(dev);
 457
 458         if (unlikely(skb_padto(skb, ETH_ZLEN)))
 459                 return NETDEV_TX_OK;
 460
 461         len = max(skb->len, ETH_ZLEN);
 462         queue = skb_get_queue_mapping(skb);
 463 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 464         netif_stop_subqueue(dev, queue);
 465 #else
 466         netif_stop_queue(dev);
 467 #endif
 468
 469         desc = &priv->desc_ring[queue];
 470         if (unlikely(desc->dataflags & CPMAC_OWN)) {
 471                 if (netif_msg_tx_err(priv) && net_ratelimit())
 472                         printk(KERN_WARNING "%s: tx dma ring full\n",
 473                                dev->name);
 474                 return NETDEV_TX_BUSY;
 475         }
 476
 477         spin_lock(&priv->lock);
 478         dev->trans_start = jiffies;
 479         spin_unlock(&priv->lock);
 480         desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN;
 481         desc->skb = skb;
 482         desc->data_mapping = dma_map_single(&dev->dev, skb->data, len,
 483                                             DMA_TO_DEVICE);
 484         desc->hw_data = (u32)desc->data_mapping;
 485         desc->datalen = len;
 486         desc->buflen = len;
 487         if (unlikely(netif_msg_tx_queued(priv)))
 488                 printk(KERN_DEBUG "%s: sending 0x%p, len=%d\n", dev->name, skb,
 489                        skb->len);
 490         if (unlikely(netif_msg_hw(priv)))
 491                 cpmac_dump_desc(dev, desc);
 492         if (unlikely(netif_msg_pktdata(priv)))
 493                 cpmac_dump_skb(dev, skb);
 494         cpmac_write(priv->regs, CPMAC_TX_PTR(queue), (u32)desc->mapping);
 495
 496         return NETDEV_TX_OK;
 497 }
 498
 499 static void cpmac_end_xmit(struct net_device *dev, int queue)
 500 {
 501         struct cpmac_desc *desc;
 502         struct cpmac_priv *priv = netdev_priv(dev);
 503
 504         desc = &priv->desc_ring[queue];
 505         cpmac_write(priv->regs, CPMAC_TX_ACK(queue), (u32)desc->mapping);
 506         if (likely(desc->skb)) {
 507                 spin_lock(&priv->lock);
 508                 dev->stats.tx_packets++;
 509                 dev->stats.tx_bytes += desc->skb->len;
 510                 spin_unlock(&priv->lock);
 511                 dma_unmap_single(&dev->dev, desc->data_mapping, desc->skb->len,
 512                                  DMA_TO_DEVICE);
 513
 514                 if (unlikely(netif_msg_tx_done(priv)))
 515                         printk(KERN_DEBUG "%s: sent 0x%p, len=%d\n", dev->name,
 516                                desc->skb, desc->skb->len);
 517
 518                 dev_kfree_skb_irq(desc->skb);
 519                 desc->skb = NULL;
 520 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 521                 if (netif_subqueue_stopped(dev, queue))
 522                         netif_wake_subqueue(dev, queue);
 523 #else
 524                 if (netif_queue_stopped(dev))
 525                         netif_wake_queue(dev);
 526 #endif
 527         } else {
 528                 if (netif_msg_tx_err(priv) && net_ratelimit())
 529                         printk(KERN_WARNING
 530                                "%s: end_xmit: spurious interrupt\n", dev->name);
 531 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 532                 if (netif_subqueue_stopped(dev, queue))
 533                         netif_wake_subqueue(dev, queue);
 534 #else
 535                 if (netif_queue_stopped(dev))
 536                         netif_wake_queue(dev);
 537 #endif
 538         }
 539 }
 540
 541 static void cpmac_hw_stop(struct net_device *dev)
 542 {
 543         int i;
 544         struct cpmac_priv *priv = netdev_priv(dev);
 545         struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data;
 546
 547         ar7_device_reset(pdata->reset_bit);
 548         cpmac_write(priv->regs, CPMAC_RX_CONTROL,
 549                     cpmac_read(priv->regs, CPMAC_RX_CONTROL) & ~1);
 550         cpmac_write(priv->regs, CPMAC_TX_CONTROL,
 551                     cpmac_read(priv->regs, CPMAC_TX_CONTROL) & ~1);
 552         for (i = 0; i < 8; i++) {
 553                 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
 554                 cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
 555         }
 556         cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
 557         cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
 558         cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
 559         cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
 560         cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
 561                     cpmac_read(priv->regs, CPMAC_MAC_CONTROL) & ~MAC_MII);
 562 }
 563
 564 static void cpmac_hw_start(struct net_device *dev)
 565 {
 566         int i;
 567         struct cpmac_priv *priv = netdev_priv(dev);
 568         struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data;
 569
 570         ar7_device_reset(pdata->reset_bit);
 571         for (i = 0; i < 8; i++) {
 572                 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
 573                 cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
 574         }
 575         cpmac_write(priv->regs, CPMAC_RX_PTR(0), priv->rx_head->mapping);
 576
 577         cpmac_write(priv->regs, CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST |
 578                     MBP_RXMCAST);
 579         cpmac_write(priv->regs, CPMAC_BUFFER_OFFSET, 0);
 580         for (i = 0; i < 8; i++)
 581                 cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]);
 582         cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]);
 583         cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] |
 584                     (dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) |
 585                     (dev->dev_addr[3] << 24));
 586         cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE);
 587         cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
 588         cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
 589         cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
 590         cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
 591         cpmac_write(priv->regs, CPMAC_UNICAST_ENABLE, 1);
 592         cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
 593         cpmac_write(priv->regs, CPMAC_TX_INT_ENABLE, 0xff);
 594         cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
 595
 596         cpmac_write(priv->regs, CPMAC_RX_CONTROL,
 597                     cpmac_read(priv->regs, CPMAC_RX_CONTROL) | 1);
 598         cpmac_write(priv->regs, CPMAC_TX_CONTROL,
 599                     cpmac_read(priv->regs, CPMAC_TX_CONTROL) | 1);
 600         cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
 601                     cpmac_read(priv->regs, CPMAC_MAC_CONTROL) | MAC_MII |
 602                     MAC_FDX);
 603 }
 604
 605 static void cpmac_clear_rx(struct net_device *dev)
 606 {
 607         struct cpmac_priv *priv = netdev_priv(dev);
 608         struct cpmac_desc *desc;
 609         int i;
 610         if (unlikely(!priv->rx_head))
 611                 return;
 612         desc = priv->rx_head;
 613         for (i = 0; i < priv->ring_size; i++) {
 614                 if ((desc->dataflags & CPMAC_OWN) == 0) {
 615                         if (netif_msg_rx_err(priv) && net_ratelimit())
 616                                 printk(KERN_WARNING "%s: packet dropped\n",
 617                                        dev->name);
 618                         if (unlikely(netif_msg_hw(priv)))
 619                                 cpmac_dump_desc(dev, desc);
 620                         desc->dataflags = CPMAC_OWN;
 621                         dev->stats.rx_dropped++;
 622                 }
 623                 desc = desc->next;
 624         }
 625 }
 626
 627 static void cpmac_clear_tx(struct net_device *dev)
 628 {
 629         struct cpmac_priv *priv = netdev_priv(dev);
 630         int i;
 631         if (unlikely(!priv->desc_ring))
 632                 return;
 633         for (i = 0; i < CPMAC_QUEUES; i++) {
 634                 priv->desc_ring[i].dataflags = 0;
 635                 if (priv->desc_ring[i].skb) {
 636                         dev_kfree_skb_any(priv->desc_ring[i].skb);
 637                         if (netif_subqueue_stopped(dev, i))
 638                             netif_wake_subqueue(dev, i);
 639                 }
 640         }
 641 }
 642
 643 static void cpmac_hw_error(struct work_struct *work)
 644 {
 645         struct cpmac_priv *priv =
 646                 container_of(work, struct cpmac_priv, reset_work);
 647
 648         spin_lock(&priv->rx_lock);
 649         cpmac_clear_rx(priv->dev);
 650         spin_unlock(&priv->rx_lock);
 651         cpmac_clear_tx(priv->dev);
 652         cpmac_hw_start(priv->dev);
 653         napi_enable(&priv->napi);
 654         netif_start_queue(priv->dev);
 655 }
 656
 657 static irqreturn_t cpmac_irq(int irq, void *dev_id)
 658 {
 659         struct net_device *dev = dev_id;
 660         struct cpmac_priv *priv;
 661         int queue;
 662         u32 status;
 663
 664         priv = netdev_priv(dev);
 665
 666         status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR);
 667
 668         if (unlikely(netif_msg_intr(priv)))
 669                 printk(KERN_DEBUG "%s: interrupt status: 0x%08x\n", dev->name,
 670                        status);
 671
 672         if (status & MAC_INT_TX)
 673                 cpmac_end_xmit(dev, (status & 7));
 674
 675         if (status & MAC_INT_RX) {
 676                 queue = (status >> 8) & 7;
 677                 if (netif_rx_schedule_prep(dev, &priv->napi)) {
 678                         cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue);
 679                         __netif_rx_schedule(dev, &priv->napi);
 680                 }
 681         }
 682
 683         cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0);
 684
 685         if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) {
 686                 if (netif_msg_drv(priv) && net_ratelimit())
 687                         printk(KERN_ERR "%s: hw error, resetting...\n",
 688                                dev->name);
 689                 netif_stop_queue(dev);
 690                 napi_disable(&priv->napi);
 691                 cpmac_hw_stop(dev);
 692                 schedule_work(&priv->reset_work);
 693                 if (unlikely(netif_msg_hw(priv)))
 694                         cpmac_dump_regs(dev);
 695         }
 696
 697         return IRQ_HANDLED;
 698 }
 699
 700 static void cpmac_tx_timeout(struct net_device *dev)
 701 {
 702         struct cpmac_priv *priv = netdev_priv(dev);
 703         int i;
 704
 705         spin_lock(&priv->lock);
 706         dev->stats.tx_errors++;
 707         spin_unlock(&priv->lock);
 708         if (netif_msg_tx_err(priv) && net_ratelimit())
 709                 printk(KERN_WARNING "%s: transmit timeout\n", dev->name);
 710         /*
 711          * FIXME: waking up random queue is not the best thing to
 712          * do... on the other hand why we got here at all?
 713          */
 714 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 715         for (i = 0; i < CPMAC_QUEUES; i++)
 716                 if (priv->desc_ring[i].skb) {
 717                         priv->desc_ring[i].dataflags = 0;
 718                         dev_kfree_skb_any(priv->desc_ring[i].skb);
 719                         netif_wake_subqueue(dev, i);
 720                         break;
 721                 }
 722 #else
 723         priv->desc_ring[0].dataflags = 0;
 724         if (priv->desc_ring[0].skb)
 725                 dev_kfree_skb_any(priv->desc_ring[0].skb);
 726         netif_wake_queue(dev);
 727 #endif
 728 }
 729
 730 static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 731 {
 732         struct cpmac_priv *priv = netdev_priv(dev);
 733         if (!(netif_running(dev)))
 734                 return -EINVAL;
 735         if (!priv->phy)
 736                 return -EINVAL;
 737         if ((cmd == SIOCGMIIPHY) || (cmd == SIOCGMIIREG) ||
 738             (cmd == SIOCSMIIREG))
 739                 return phy_mii_ioctl(priv->phy, if_mii(ifr), cmd);
 740
 741         return -EOPNOTSUPP;
 742 }
 743
 744 static int cpmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 745 {
 746         struct cpmac_priv *priv = netdev_priv(dev);
 747
 748         if (priv->phy)
 749                 return phy_ethtool_gset(priv->phy, cmd);
 750
 751         return -EINVAL;
 752 }
 753
 754 static int cpmac_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 755 {
 756         struct cpmac_priv *priv = netdev_priv(dev);
 757
 758         if (!capable(CAP_NET_ADMIN))
 759                 return -EPERM;
 760
 761         if (priv->phy)
 762                 return phy_ethtool_sset(priv->phy, cmd);
 763
 764         return -EINVAL;
 765 }
 766
 767 static void cpmac_get_ringparam(struct net_device *dev, struct ethtool_ringparam* ring)
 768 {
 769         struct cpmac_priv *priv = netdev_priv(dev);
 770
 771         ring->rx_max_pending = 1024;
 772         ring->rx_mini_max_pending = 1;
 773         ring->rx_jumbo_max_pending = 1;
 774         ring->tx_max_pending = 1;
 775
 776         ring->rx_pending = priv->ring_size;
 777         ring->rx_mini_pending = 1;
 778         ring->rx_jumbo_pending = 1;
 779         ring->tx_pending = 1;
 780 }
 781
 782 static int cpmac_set_ringparam(struct net_device *dev, struct ethtool_ringparam* ring)
 783 {
 784         struct cpmac_priv *priv = netdev_priv(dev);
 785
 786         if (netif_running(dev))
 787                 return -EBUSY;
 788         priv->ring_size = ring->rx_pending;
 789         return 0;
 790 }
 791
 792 static void cpmac_get_drvinfo(struct net_device *dev,
 793                               struct ethtool_drvinfo *info)
 794 {
 795         strcpy(info->driver, "cpmac");
 796         strcpy(info->version, CPMAC_VERSION);
 797         info->fw_version[0] = '\0';
 798         sprintf(info->bus_info, "%s", "cpmac");
 799         info->regdump_len = 0;
 800 }
 801
 802 static const struct ethtool_ops cpmac_ethtool_ops = {
 803         .get_settings = cpmac_get_settings,
 804         .set_settings = cpmac_set_settings,
 805         .get_drvinfo = cpmac_get_drvinfo,
 806         .get_link = ethtool_op_get_link,
 807         .get_ringparam = cpmac_get_ringparam,
 808         .set_ringparam = cpmac_set_ringparam,
 809 };
 810
 811 static void cpmac_adjust_link(struct net_device *dev)
 812 {
 813         struct cpmac_priv *priv = netdev_priv(dev);
 814         int new_state = 0;
 815
 816         spin_lock(&priv->lock);
 817         if (priv->phy->link) {
 818                 netif_start_queue(dev);
 819                 if (priv->phy->duplex != priv->oldduplex) {
 820                         new_state = 1;
 821                         priv->oldduplex = priv->phy->duplex;
 822                 }
 823
 824                 if (priv->phy->speed != priv->oldspeed) {
 825                         new_state = 1;
 826                         priv->oldspeed = priv->phy->speed;
 827                 }
 828
 829                 if (!priv->oldlink) {
 830                         new_state = 1;
 831                         priv->oldlink = 1;
 832                         netif_schedule(dev);
 833                 }
 834         } else if (priv->oldlink) {
 835                 netif_stop_queue(dev);
 836                 new_state = 1;
 837                 priv->oldlink = 0;
 838                 priv->oldspeed = 0;
 839                 priv->oldduplex = -1;
 840         }
 841
 842         if (new_state && netif_msg_link(priv) && net_ratelimit())
 843                 phy_print_status(priv->phy);
 844
 845         spin_unlock(&priv->lock);
 846 }
 847
 848 static int cpmac_link_update(struct net_device *dev,
 849                              struct fixed_phy_status *status)
 850 {
 851         status->link = 1;
 852         status->speed = 100;
 853         status->duplex = 1;
 854         return 0;
 855 }
 856
 857 static int cpmac_open(struct net_device *dev)
 858 {
 859         int i, size, res;
 860         struct cpmac_priv *priv = netdev_priv(dev);
 861         struct resource *mem;
 862         struct cpmac_desc *desc;
 863         struct sk_buff *skb;
 864
 865         mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
 866         if (!request_mem_region(mem->start, mem->end - mem->start, dev->name)) {
 867                 if (netif_msg_drv(priv))
 868                         printk(KERN_ERR "%s: failed to request registers\n",
 869                                dev->name);
 870                 res = -ENXIO;
 871                 goto fail_reserve;
 872         }
 873
 874         priv->regs = ioremap(mem->start, mem->end - mem->start);
 875         if (!priv->regs) {
 876                 if (netif_msg_drv(priv))
 877                         printk(KERN_ERR "%s: failed to remap registers\n",
 878                                dev->name);
 879                 res = -ENXIO;
 880                 goto fail_remap;
 881         }
 882
 883         size = priv->ring_size + CPMAC_QUEUES;
 884         priv->desc_ring = dma_alloc_coherent(&dev->dev,
 885                                              sizeof(struct cpmac_desc) * size,
 886                                              &priv->dma_ring,
 887                                              GFP_KERNEL);
 888         if (!priv->desc_ring) {
 889                 res = -ENOMEM;
 890                 goto fail_alloc;
 891         }
 892
 893         for (i = 0; i < size; i++)
 894                 priv->desc_ring[i].mapping = priv->dma_ring + sizeof(*desc) * i;
 895
 896         priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
 897         for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) {
 898                 skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE);
 899                 if (unlikely(!skb)) {
 900                         res = -ENOMEM;
 901                         goto fail_desc;
 902                 }
 903                 skb_reserve(skb, 2);
 904                 desc->skb = skb;
 905                 desc->data_mapping = dma_map_single(&dev->dev, skb->data,
 906                                                     CPMAC_SKB_SIZE,
 907                                                     DMA_FROM_DEVICE);
 908                 desc->hw_data = (u32)desc->data_mapping;
 909                 desc->buflen = CPMAC_SKB_SIZE;
 910                 desc->dataflags = CPMAC_OWN;
 911                 desc->next = &priv->rx_head[(i + 1) % priv->ring_size];
 912                 desc->hw_next = (u32)desc->next->mapping;
 913         }
 914
 915         if ((res = request_irq(dev->irq, cpmac_irq, IRQF_SHARED,
 916                                dev->name, dev))) {
 917                 if (netif_msg_drv(priv))
 918                         printk(KERN_ERR "%s: failed to obtain irq\n",
 919                                dev->name);
 920                 goto fail_irq;
 921         }
 922
 923         INIT_WORK(&priv->reset_work, cpmac_hw_error);
 924         cpmac_hw_start(dev);
 925
 926         napi_enable(&priv->napi);
 927         priv->phy->state = PHY_CHANGELINK;
 928         phy_start(priv->phy);
 929
 930         return 0;
 931
 932 fail_irq:
 933 fail_desc:
 934         for (i = 0; i < priv->ring_size; i++) {
 935                 if (priv->rx_head[i].skb) {
 936                         dma_unmap_single(&dev->dev,
 937                                          priv->rx_head[i].data_mapping,
 938                                          CPMAC_SKB_SIZE,
 939                                          DMA_FROM_DEVICE);
 940                         kfree_skb(priv->rx_head[i].skb);
 941                 }
 942         }
 943 fail_alloc:
 944         kfree(priv->desc_ring);
 945         iounmap(priv->regs);
 946
 947 fail_remap:
 948         release_mem_region(mem->start, mem->end - mem->start);
 949
 950 fail_reserve:
 951         return res;
 952 }
 953
 954 static int cpmac_stop(struct net_device *dev)
 955 {
 956         int i;
 957         struct cpmac_priv *priv = netdev_priv(dev);
 958         struct resource *mem;
 959
 960         netif_stop_queue(dev);
 961
 962         cancel_work_sync(&priv->reset_work);
 963         napi_disable(&priv->napi);
 964         phy_stop(priv->phy);
 965
 966         cpmac_hw_stop(dev);
 967
 968         for (i = 0; i < 8; i++)
 969                 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
 970         cpmac_write(priv->regs, CPMAC_RX_PTR(0), 0);
 971         cpmac_write(priv->regs, CPMAC_MBP, 0);
 972
 973         free_irq(dev->irq, dev);
 974         iounmap(priv->regs);
 975         mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
 976         release_mem_region(mem->start, mem->end - mem->start);
 977         priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
 978         for (i = 0; i < priv->ring_size; i++) {
 979                 if (priv->rx_head[i].skb) {
 980                         dma_unmap_single(&dev->dev,
 981                                          priv->rx_head[i].data_mapping,
 982                                          CPMAC_SKB_SIZE,
 983                                          DMA_FROM_DEVICE);
 984                         kfree_skb(priv->rx_head[i].skb);
 985                 }
 986         }
 987
 988         dma_free_coherent(&dev->dev, sizeof(struct cpmac_desc) *
 989                           (CPMAC_QUEUES + priv->ring_size),
 990                           priv->desc_ring, priv->dma_ring);
 991         return 0;
 992 }
 993
 994 static int external_switch;
 995
 996 static int __devinit cpmac_probe(struct platform_device *pdev)
 997 {
 998         int rc, phy_id, i;
 999         struct resource *mem;
1000         struct cpmac_priv *priv;
1001         struct net_device *dev;
1002         struct plat_cpmac_data *pdata;
1003         struct fixed_info *fixed_phy;
1004         DECLARE_MAC_BUF(mac);
1005
1006         pdata = pdev->dev.platform_data;
1007
1008         for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
1009                 if (!(pdata->phy_mask & (1 << phy_id)))
1010                         continue;
1011                 if (!cpmac_mii.phy_map[phy_id])
1012                         continue;
1013                 break;
1014         }
1015
1016         if (phy_id == PHY_MAX_ADDR) {
1017                 if (external_switch || dumb_switch)
1018                         phy_id = 0;
1019                 else {
1020                         printk(KERN_ERR "cpmac: no PHY present\n");
1021                         return -ENODEV;
1022                 }
1023         }
1024
1025         dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES);
1026
1027         if (!dev) {
1028                 printk(KERN_ERR "cpmac: Unable to allocate net_device\n");
1029                 return -ENOMEM;
1030         }
1031
1032         platform_set_drvdata(pdev, dev);
1033         priv = netdev_priv(dev);
1034
1035         priv->pdev = pdev;
1036         mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
1037         if (!mem) {
1038                 rc = -ENODEV;
1039                 goto fail;
1040         }
1041
1042         dev->irq = platform_get_irq_byname(pdev, "irq");
1043
1044         dev->open               = cpmac_open;
1045         dev->stop               = cpmac_stop;
1046         dev->set_config         = cpmac_config;
1047         dev->hard_start_xmit    = cpmac_start_xmit;
1048         dev->do_ioctl           = cpmac_ioctl;
1049         dev->set_multicast_list = cpmac_set_multicast_list;
1050         dev->tx_timeout         = cpmac_tx_timeout;
1051         dev->ethtool_ops        = &cpmac_ethtool_ops;
1052         dev->features |= NETIF_F_MULTI_QUEUE;
1053
1054         netif_napi_add(dev, &priv->napi, cpmac_poll, 64);
1055
1056         spin_lock_init(&priv->lock);
1057         spin_lock_init(&priv->rx_lock);
1058         priv->dev = dev;
1059         priv->ring_size = 64;
1060         priv->msg_enable = netif_msg_init(debug_level, 0xff);
1061         memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr));
1062
1063         if (phy_id == 31) {
1064                 snprintf(priv->phy_name, BUS_ID_SIZE, PHY_ID_FMT, cpmac_mii.id,
1065                          phy_id);
1066         } else {
1067                 /* Let's try to get a free fixed phy... */
1068                 for (i = 0; i < MAX_PHY_AMNT; i++) {
1069                         fixed_phy = fixed_mdio_get_phydev(i);
1070                         if (!fixed_phy)
1071                                 continue;
1072                         if (!fixed_phy->phydev->attached_dev) {
1073                                 strncpy(priv->phy_name,
1074                                         fixed_phy->phydev->dev.bus_id,
1075                                         BUS_ID_SIZE);
1076                                 fixed_mdio_set_link_update(fixed_phy->phydev,
1077                                                            &cpmac_link_update);
1078                                 goto phy_found;
1079                         }
1080                 }
1081                 if (netif_msg_drv(priv))
1082                         printk(KERN_ERR "%s: Could not find fixed PHY\n",
1083                                dev->name);
1084                 rc = -ENODEV;
1085                 goto fail;
1086         }
1087
1088 phy_found:
1089         priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link, 0,
1090                                 PHY_INTERFACE_MODE_MII);
1091         if (IS_ERR(priv->phy)) {
1092                 if (netif_msg_drv(priv))
1093                         printk(KERN_ERR "%s: Could not attach to PHY\n",
1094                                dev->name);
1095                 return PTR_ERR(priv->phy);
1096         }
1097
1098         if ((rc = register_netdev(dev))) {
1099                 printk(KERN_ERR "cpmac: error %i registering device %s\n", rc,
1100                        dev->name);
1101                 goto fail;
1102         }
1103
1104         if (netif_msg_probe(priv)) {
1105                 printk(KERN_INFO
1106                        "cpmac: device %s (regs: %p, irq: %d, phy: %s, "
1107                        "mac: %s)\n", dev->name, (void *)mem->start, dev->irq,
1108                        priv->phy_name, print_mac(mac, dev->dev_addr));
1109         }
1110         return 0;
1111
1112 fail:
1113         free_netdev(dev);
1114         return rc;
1115 }
1116
1117 static int __devexit cpmac_remove(struct platform_device *pdev)
1118 {
1119         struct net_device *dev = platform_get_drvdata(pdev);
1120         unregister_netdev(dev);
1121         free_netdev(dev);
1122         return 0;
1123 }
1124
1125 static struct platform_driver cpmac_driver = {
1126         .driver.name = "cpmac",
1127         .probe = cpmac_probe,
1128         .remove = __devexit_p(cpmac_remove),
1129 };
1130
1131 int __devinit cpmac_init(void)
1132 {
1133         u32 mask;
1134         int i, res;
1135
1136         cpmac_mii.priv = ioremap(AR7_REGS_MDIO, 256);
1137
1138         if (!cpmac_mii.priv) {
1139                 printk(KERN_ERR "Can't ioremap mdio registers\n");
1140                 return -ENXIO;
1141         }
1142
1143 #warning FIXME: unhardcode gpio&reset bits
1144         ar7_gpio_disable(26);
1145         ar7_gpio_disable(27);
1146         ar7_device_reset(AR7_RESET_BIT_CPMAC_LO);
1147         ar7_device_reset(AR7_RESET_BIT_CPMAC_HI);
1148         ar7_device_reset(AR7_RESET_BIT_EPHY);
1149
1150         cpmac_mii.reset(&cpmac_mii);
1151
1152         for (i = 0; i < 300000; i++)
1153                 if ((mask = cpmac_read(cpmac_mii.priv, CPMAC_MDIO_ALIVE)))
1154                         break;
1155                 else
1156                         cpu_relax();
1157
1158         mask &= 0x7fffffff;
1159         if (mask & (mask - 1)) {
1160                 external_switch = 1;
1161                 mask = 0;
1162         }
1163
1164         cpmac_mii.phy_mask = ~(mask | 0x80000000);
1165
1166         res = mdiobus_register(&cpmac_mii);
1167         if (res)
1168                 goto fail_mii;
1169
1170         res = platform_driver_register(&cpmac_driver);
1171         if (res)
1172                 goto fail_cpmac;
1173
1174         return 0;
1175
1176 fail_cpmac:
1177         mdiobus_unregister(&cpmac_mii);
1178
1179 fail_mii:
1180         iounmap(cpmac_mii.priv);
1181
1182         return res;
1183 }
1184
1185 void __devexit cpmac_exit(void)
1186 {
1187         platform_driver_unregister(&cpmac_driver);
1188         mdiobus_unregister(&cpmac_mii);
1189         iounmap(cpmac_mii.priv);
1190 }
1191
1192 module_init(cpmac_init);
1193 module_exit(cpmac_exit);