target/linux/generic/files/drivers/net/phy/ar8216.c

   1 /*
   2  * ar8216.c: AR8216 switch driver
   3  *
   4  * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/if.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/list.h>
  21 #include <linux/if_ether.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/netlink.h>
  25 #include <linux/bitops.h>
  26 #include <net/genetlink.h>
  27 #include <linux/switch.h>
  28 #include <linux/delay.h>
  29 #include <linux/phy.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/etherdevice.h>
  32 #include "ar8216.h"
  33
  34 /* size of the vlan table */
  35 #define AR8X16_MAX_VLANS        128
  36 #define AR8X16_PROBE_RETRIES    10
  37
  38 struct ar8216_priv {
  39         struct switch_dev dev;
  40         struct phy_device *phy;
  41         u32 (*read)(struct ar8216_priv *priv, int reg);
  42         void (*write)(struct ar8216_priv *priv, int reg, u32 val);
  43         const struct net_device_ops *ndo_old;
  44         struct net_device_ops ndo;
  45         struct mutex reg_mutex;
  46         int chip;
  47         bool initialized;
  48         bool port4_phy;
  49         char buf[80];
  50
  51         /* all fields below are cleared on reset */
  52         bool vlan;
  53         u16 vlan_id[AR8X16_MAX_VLANS];
  54         u8 vlan_table[AR8X16_MAX_VLANS];
  55         u8 vlan_tagged;
  56         u16 pvid[AR8216_NUM_PORTS];
  57 };
  58
  59 #define to_ar8216(_dev) container_of(_dev, struct ar8216_priv, dev)
  60
  61 static inline void
  62 split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
  63 {
  64         regaddr >>= 1;
  65         *r1 = regaddr & 0x1e;
  66
  67         regaddr >>= 5;
  68         *r2 = regaddr & 0x7;
  69
  70         regaddr >>= 3;
  71         *page = regaddr & 0x1ff;
  72 }
  73
  74 static u32
  75 ar8216_mii_read(struct ar8216_priv *priv, int reg)
  76 {
  77         struct phy_device *phy = priv->phy;
  78         u16 r1, r2, page;
  79         u16 lo, hi;
  80
  81         split_addr((u32) reg, &r1, &r2, &page);
  82         phy->bus->write(phy->bus, 0x18, 0, page);
  83         msleep(1); /* wait for the page switch to propagate */
  84         lo = phy->bus->read(phy->bus, 0x10 | r2, r1);
  85         hi = phy->bus->read(phy->bus, 0x10 | r2, r1 + 1);
  86
  87         return (hi << 16) | lo;
  88 }
  89
  90 static void
  91 ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
  92 {
  93         struct phy_device *phy = priv->phy;
  94         u16 r1, r2, r3;
  95         u16 lo, hi;
  96
  97         split_addr((u32) reg, &r1, &r2, &r3);
  98         phy->bus->write(phy->bus, 0x18, 0, r3);
  99         msleep(1); /* wait for the page switch to propagate */
 100
 101         lo = val & 0xffff;
 102         hi = (u16) (val >> 16);
 103         phy->bus->write(phy->bus, 0x10 | r2, r1 + 1, hi);
 104         phy->bus->write(phy->bus, 0x10 | r2, r1, lo);
 105 }
 106
 107 static u32
 108 ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 109 {
 110         u32 v;
 111
 112         v = priv->read(priv, reg);
 113         v &= ~mask;
 114         v |= val;
 115         priv->write(priv, reg, v);
 116
 117         return v;
 118 }
 119
 120 static inline int
 121 ar8216_id_chip(struct ar8216_priv *priv)
 122 {
 123         u32 val;
 124         u16 id;
 125         int i;
 126
 127         val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 128         if (val == ~0)
 129                 return UNKNOWN;
 130
 131         id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 132         for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
 133                 u16 t;
 134
 135                 val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 136                 if (val == ~0)
 137                         return UNKNOWN;
 138
 139                 t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 140                 if (t != id)
 141                         return UNKNOWN;
 142         }
 143
 144         switch (id) {
 145         case 0x0101:
 146                 return AR8216;
 147         case 0x1000:
 148         case 0x1001:
 149                 return AR8316;
 150         default:
 151                 printk(KERN_DEBUG
 152                         "ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
 153                         (int)(id >> AR8216_CTRL_VERSION_S),
 154                         (int)(id & AR8216_CTRL_REVISION),
 155                         priv->phy->bus->read(priv->phy->bus, priv->phy->addr, 2),
 156                         priv->phy->bus->read(priv->phy->bus, priv->phy->addr, 3));
 157
 158                 return UNKNOWN;
 159         }
 160 }
 161
 162 static int
 163 ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 164                 struct switch_val *val)
 165 {
 166         struct ar8216_priv *priv = to_ar8216(dev);
 167         priv->vlan = !!val->value.i;
 168         return 0;
 169 }
 170
 171 static int
 172 ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 173                 struct switch_val *val)
 174 {
 175         struct ar8216_priv *priv = to_ar8216(dev);
 176         val->value.i = priv->vlan;
 177         return 0;
 178 }
 179
 180
 181 static int
 182 ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
 183 {
 184         struct ar8216_priv *priv = to_ar8216(dev);
 185
 186         /* make sure no invalid PVIDs get set */
 187
 188         if (vlan >= dev->vlans)
 189                 return -EINVAL;
 190
 191         priv->pvid[port] = vlan;
 192         return 0;
 193 }
 194
 195 static int
 196 ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
 197 {
 198         struct ar8216_priv *priv = to_ar8216(dev);
 199         *vlan = priv->pvid[port];
 200         return 0;
 201 }
 202
 203 static int
 204 ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
 205                 struct switch_val *val)
 206 {
 207         struct ar8216_priv *priv = to_ar8216(dev);
 208         priv->vlan_id[val->port_vlan] = val->value.i;
 209         return 0;
 210 }
 211
 212 static int
 213 ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
 214                 struct switch_val *val)
 215 {
 216         struct ar8216_priv *priv = to_ar8216(dev);
 217         val->value.i = priv->vlan_id[val->port_vlan];
 218         return 0;
 219 }
 220
 221 static const char *ar8216_speed_str(unsigned speed)
 222 {
 223         switch (speed) {
 224         case AR8216_PORT_SPEED_10M:
 225                 return "10baseT";
 226         case AR8216_PORT_SPEED_100M:
 227                 return "100baseT";
 228         case AR8216_PORT_SPEED_1000M:
 229                 return "1000baseT";
 230         }
 231
 232         return "unknown";
 233 }
 234
 235 static int ar8216_port_get_link(struct switch_dev *dev,
 236                                 const struct switch_attr *attr,
 237                                 struct switch_val *val)
 238 {
 239         struct ar8216_priv *priv = to_ar8216(dev);
 240         u32 len;
 241         u32 status;
 242         int port;
 243
 244         port = val->port_vlan;
 245
 246         memset(priv->buf, '\0', sizeof(priv->buf));
 247         status = priv->read(priv, AR8216_REG_PORT_STATUS(port));
 248
 249         if (status & AR8216_PORT_STATUS_LINK_UP) {
 250                 len = snprintf(priv->buf, sizeof(priv->buf),
 251                                 "port:%d link:up speed:%s %s-duplex %s%s%s",
 252                                 port,
 253                                 ar8216_speed_str((status &
 254                                                   AR8216_PORT_STATUS_SPEED) >>
 255                                                  AR8216_PORT_STATUS_SPEED_S),
 256                                 (status & AR8216_PORT_STATUS_DUPLEX) ?
 257                                         "full" : "half",
 258                                 (status & AR8216_PORT_STATUS_TXFLOW) ?
 259                                         "txflow ": "",
 260                                 (status & AR8216_PORT_STATUS_RXFLOW) ?
 261                                         "rxflow " : "",
 262                                 (status & AR8216_PORT_STATUS_LINK_AUTO) ?
 263                                         "auto ": "");
 264         } else {
 265                 len = snprintf(priv->buf, sizeof(priv->buf), "port:%d link:down",
 266                                 port);
 267         }
 268
 269         val->value.s = priv->buf;
 270         val->len = len;
 271
 272         return 0;
 273 }
 274
 275 static int
 276 ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
 277 {
 278         struct ar8216_priv *priv = dev->phy_ptr;
 279         unsigned char *buf;
 280
 281     if (unlikely(!priv))
 282         goto error;
 283
 284         if (!priv->vlan)
 285                 goto send;
 286
 287         if (unlikely(skb_headroom(skb) < 2)) {
 288                 if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
 289                         goto error;
 290         }
 291
 292         buf = skb_push(skb, 2);
 293         buf[0] = 0x10;
 294         buf[1] = 0x80;
 295
 296 send:
 297         return priv->ndo_old->ndo_start_xmit(skb, dev);
 298
 299 error:
 300         dev_kfree_skb_any(skb);
 301         return 0;
 302 }
 303
 304 static int
 305 ar8216_mangle_rx(struct sk_buff *skb, int napi)
 306 {
 307         struct ar8216_priv *priv;
 308         struct net_device *dev;
 309         unsigned char *buf;
 310         int port, vlan;
 311
 312         dev = skb->dev;
 313         if (!dev)
 314                 goto error;
 315
 316         priv = dev->phy_ptr;
 317         if (!priv)
 318                 goto error;
 319
 320         /* don't strip the header if vlan mode is disabled */
 321         if (!priv->vlan)
 322                 goto recv;
 323
 324         /* strip header, get vlan id */
 325         buf = skb->data;
 326         skb_pull(skb, 2);
 327
 328         /* check for vlan header presence */
 329         if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
 330                 goto recv;
 331
 332         port = buf[0] & 0xf;
 333
 334         /* no need to fix up packets coming from a tagged source */
 335         if (priv->vlan_tagged & (1 << port))
 336                 goto recv;
 337
 338         /* lookup port vid from local table, the switch passes an invalid vlan id */
 339         vlan = priv->vlan_id[priv->pvid[port]];
 340
 341         buf[14 + 2] &= 0xf0;
 342         buf[14 + 2] |= vlan >> 8;
 343         buf[15 + 2] = vlan & 0xff;
 344
 345 recv:
 346         skb->protocol = eth_type_trans(skb, skb->dev);
 347
 348         if (napi)
 349                 return netif_receive_skb(skb);
 350         else
 351                 return netif_rx(skb);
 352
 353 error:
 354         /* no vlan? eat the packet! */
 355         dev_kfree_skb_any(skb);
 356         return NET_RX_DROP;
 357 }
 358
 359 static int
 360 ar8216_netif_rx(struct sk_buff *skb)
 361 {
 362         return ar8216_mangle_rx(skb, 0);
 363 }
 364
 365 static int
 366 ar8216_netif_receive_skb(struct sk_buff *skb)
 367 {
 368         return ar8216_mangle_rx(skb, 1);
 369 }
 370
 371
 372 static struct switch_attr ar8216_globals[] = {
 373         {
 374                 .type = SWITCH_TYPE_INT,
 375                 .name = "enable_vlan",
 376                 .description = "Enable VLAN mode",
 377                 .set = ar8216_set_vlan,
 378                 .get = ar8216_get_vlan,
 379                 .max = 1
 380         },
 381 };
 382
 383 static struct switch_attr ar8216_port[] = {
 384         {
 385                 .type = SWITCH_TYPE_STRING,
 386                 .name = "link",
 387                 .description = "Get port link information",
 388                 .max = 1,
 389                 .set = NULL,
 390                 .get = ar8216_port_get_link,
 391         },
 392 };
 393
 394 static struct switch_attr ar8216_vlan[] = {
 395         {
 396                 .type = SWITCH_TYPE_INT,
 397                 .name = "vid",
 398                 .description = "VLAN ID (0-4094)",
 399                 .set = ar8216_set_vid,
 400                 .get = ar8216_get_vid,
 401                 .max = 4094,
 402         },
 403 };
 404
 405
 406 static int
 407 ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
 408 {
 409         struct ar8216_priv *priv = to_ar8216(dev);
 410         u8 ports = priv->vlan_table[val->port_vlan];
 411         int i;
 412
 413         val->len = 0;
 414         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 415                 struct switch_port *p;
 416
 417                 if (!(ports & (1 << i)))
 418                         continue;
 419
 420                 p = &val->value.ports[val->len++];
 421                 p->id = i;
 422                 if (priv->vlan_tagged & (1 << i))
 423                         p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
 424                 else
 425                         p->flags = 0;
 426         }
 427         return 0;
 428 }
 429
 430 static int
 431 ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
 432 {
 433         struct ar8216_priv *priv = to_ar8216(dev);
 434         u8 *vt = &priv->vlan_table[val->port_vlan];
 435         int i, j;
 436
 437         *vt = 0;
 438         for (i = 0; i < val->len; i++) {
 439                 struct switch_port *p = &val->value.ports[i];
 440
 441                 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
 442                         priv->vlan_tagged |= (1 << p->id);
 443                 else {
 444                         priv->vlan_tagged &= ~(1 << p->id);
 445                         priv->pvid[p->id] = val->port_vlan;
 446
 447                         /* make sure that an untagged port does not
 448                          * appear in other vlans */
 449                         for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 450                                 if (j == val->port_vlan)
 451                                         continue;
 452                                 priv->vlan_table[j] &= ~(1 << p->id);
 453                         }
 454                 }
 455
 456                 *vt |= 1 << p->id;
 457         }
 458         return 0;
 459 }
 460
 461 static int
 462 ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 463 {
 464         int timeout = 20;
 465
 466         while ((priv->read(priv, reg) & mask) != val) {
 467                 if (timeout-- <= 0) {
 468                         printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
 469                         return 1;
 470                 }
 471         }
 472         return 0;
 473 }
 474
 475 static void
 476 ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
 477 {
 478         if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
 479                 return;
 480         if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
 481                 val &= AR8216_VTUDATA_MEMBER;
 482                 val |= AR8216_VTUDATA_VALID;
 483                 priv->write(priv, AR8216_REG_VTU_DATA, val);
 484         }
 485         op |= AR8216_VTU_ACTIVE;
 486         priv->write(priv, AR8216_REG_VTU, op);
 487 }
 488
 489 static int
 490 ar8216_hw_apply(struct switch_dev *dev)
 491 {
 492         struct ar8216_priv *priv = to_ar8216(dev);
 493         u8 portmask[AR8216_NUM_PORTS];
 494         int i, j;
 495
 496         mutex_lock(&priv->reg_mutex);
 497         /* flush all vlan translation unit entries */
 498         ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
 499
 500         memset(portmask, 0, sizeof(portmask));
 501         if (priv->vlan) {
 502                 /* calculate the port destination masks and load vlans
 503                  * into the vlan translation unit */
 504                 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 505                         u8 vp = priv->vlan_table[j];
 506
 507                         if (!vp)
 508                                 continue;
 509
 510                         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 511                                 u8 mask = (1 << i);
 512                                 if (vp & mask)
 513                                         portmask[i] |= vp & ~mask;
 514                         }
 515
 516                         ar8216_vtu_op(priv,
 517                                 AR8216_VTU_OP_LOAD |
 518                                 (priv->vlan_id[j] << AR8216_VTU_VID_S),
 519                                 priv->vlan_table[j]);
 520                 }
 521         } else {
 522                 /* vlan disabled:
 523                  * isolate all ports, but connect them to the cpu port */
 524                 for (i = 0; i < AR8216_NUM_PORTS; i++) {
 525                         if (i == AR8216_PORT_CPU)
 526                                 continue;
 527
 528                         portmask[i] = 1 << AR8216_PORT_CPU;
 529                         portmask[AR8216_PORT_CPU] |= (1 << i);
 530                 }
 531         }
 532
 533         /* update the port destination mask registers and tag settings */
 534         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 535                 int egress, ingress;
 536                 int pvid;
 537
 538                 if (priv->vlan) {
 539                         pvid = priv->vlan_id[priv->pvid[i]];
 540                 } else {
 541                         pvid = i;
 542                 }
 543
 544                 if (priv->vlan && (priv->vlan_tagged & (1 << i))) {
 545                         egress = AR8216_OUT_ADD_VLAN;
 546                 } else {
 547                         egress = AR8216_OUT_STRIP_VLAN;
 548                 }
 549                 if (priv->vlan) {
 550                         ingress = AR8216_IN_SECURE;
 551                 } else {
 552                         ingress = AR8216_IN_PORT_ONLY;
 553                 }
 554
 555                 ar8216_rmw(priv, AR8216_REG_PORT_CTRL(i),
 556                         AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 557                         AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 558                         AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 559                         AR8216_PORT_CTRL_LEARN |
 560                           (priv->vlan && i == AR8216_PORT_CPU && (priv->chip == AR8216) ?
 561                            AR8216_PORT_CTRL_HEADER : 0) |
 562                           (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 563                           (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 564
 565                 ar8216_rmw(priv, AR8216_REG_PORT_VLAN(i),
 566                         AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
 567                           AR8216_PORT_VLAN_DEFAULT_ID,
 568                         (portmask[i] << AR8216_PORT_VLAN_DEST_PORTS_S) |
 569                           (ingress << AR8216_PORT_VLAN_MODE_S) |
 570                           (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
 571         }
 572         mutex_unlock(&priv->reg_mutex);
 573         return 0;
 574 }
 575
 576 static int
 577 ar8316_hw_init(struct ar8216_priv *priv) {
 578         int i;
 579         u32 val, newval;
 580         struct mii_bus *bus;
 581
 582         val = priv->read(priv, 0x8);
 583
 584         if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 585                 if (priv->port4_phy) {
 586                         /* value taken from Ubiquiti RouterStation Pro */
 587                         newval = 0x81461bea;
 588                         printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
 589                 } else {
 590                         newval = 0x01261be2;
 591                         printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
 592                 }
 593         } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
 594                 /* value taken from AVM Fritz!Box 7390 sources */
 595                 newval = 0x010e5b71;
 596         } else {
 597                 /* no known value for phy interface */
 598                 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
 599                         priv->phy->interface);
 600                 return -EINVAL;
 601         }
 602
 603         if (val == newval)
 604                 goto out;
 605
 606         priv->write(priv, 0x8, newval);
 607
 608         /* standard atheros magic */
 609         priv->write(priv, 0x38, 0xc000050e);
 610
 611         /* Initialize the ports */
 612         bus = priv->phy->bus;
 613         for (i = 0; i < 5; i++) {
 614                 if ((i == 4) && priv->port4_phy &&
 615                     priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 616                         /* work around for phy4 rgmii mode */
 617                         bus->write(bus, i, MII_ATH_DBG_ADDR, 0x12);
 618                         bus->write(bus, i, MII_ATH_DBG_DATA, 0x480c);
 619                         /* rx delay */
 620                         bus->write(bus, i, MII_ATH_DBG_ADDR, 0x0);
 621                         bus->write(bus, i, MII_ATH_DBG_DATA, 0x824e);
 622                         /* tx delay */
 623                         bus->write(bus, i, MII_ATH_DBG_ADDR, 0x5);
 624                         bus->write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
 625                         msleep(1000);
 626                 }
 627
 628                 /* initialize the port itself */
 629                 bus->write(bus, i, MII_ADVERTISE,
 630                         ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 631                 bus->write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
 632                 bus->write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 633                 msleep(1000);
 634         }
 635
 636 out:
 637         priv->initialized = true;
 638         return 0;
 639 }
 640
 641 static int
 642 ar8216_reset_switch(struct switch_dev *dev)
 643 {
 644         struct ar8216_priv *priv = to_ar8216(dev);
 645         int i;
 646
 647         mutex_lock(&priv->reg_mutex);
 648         memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
 649                 offsetof(struct ar8216_priv, vlan));
 650         for (i = 0; i < AR8X16_MAX_VLANS; i++) {
 651                 priv->vlan_id[i] = i;
 652         }
 653         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 654                 /* Enable port learning and tx */
 655                 priv->write(priv, AR8216_REG_PORT_CTRL(i),
 656                         AR8216_PORT_CTRL_LEARN |
 657                         (4 << AR8216_PORT_CTRL_STATE_S));
 658
 659                 priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
 660
 661                 /* Configure all PHYs */
 662                 if (i == AR8216_PORT_CPU) {
 663                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 664                                 AR8216_PORT_STATUS_LINK_UP |
 665                                 ((priv->chip == AR8316) ?
 666                                         AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
 667                                 AR8216_PORT_STATUS_TXMAC |
 668                                 AR8216_PORT_STATUS_RXMAC |
 669                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
 670                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
 671                                 AR8216_PORT_STATUS_DUPLEX);
 672                 } else {
 673                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 674                                 AR8216_PORT_STATUS_LINK_AUTO);
 675                 }
 676         }
 677         /* XXX: undocumented magic from atheros, required! */
 678         priv->write(priv, 0x38, 0xc000050e);
 679
 680         if (priv->chip == AR8216) {
 681                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 682                         AR8216_GCTRL_MTU, 1518 + 8 + 2);
 683         } else if (priv->chip == AR8316) {
 684                 /* enable jumbo frames */
 685                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 686                         AR8316_GCTRL_MTU, 9018 + 8 + 2);
 687         }
 688
 689         if (priv->chip == AR8316) {
 690                 /* enable cpu port to receive multicast and broadcast frames */
 691                 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
 692         }
 693         mutex_unlock(&priv->reg_mutex);
 694         return ar8216_hw_apply(dev);
 695 }
 696
 697
 698 static const struct switch_dev_ops ar8216_ops = {
 699         .attr_global = {
 700                 .attr = ar8216_globals,
 701                 .n_attr = ARRAY_SIZE(ar8216_globals),
 702         },
 703         .attr_port = {
 704                 .attr = ar8216_port,
 705                 .n_attr = ARRAY_SIZE(ar8216_port),
 706         },
 707         .attr_vlan = {
 708                 .attr = ar8216_vlan,
 709                 .n_attr = ARRAY_SIZE(ar8216_vlan),
 710         },
 711         .get_port_pvid = ar8216_get_pvid,
 712         .set_port_pvid = ar8216_set_pvid,
 713         .get_vlan_ports = ar8216_get_ports,
 714         .set_vlan_ports = ar8216_set_ports,
 715         .apply_config = ar8216_hw_apply,
 716         .reset_switch = ar8216_reset_switch,
 717 };
 718
 719 static int
 720 ar8216_config_init(struct phy_device *pdev)
 721 {
 722         struct ar8216_priv *priv = pdev->priv;
 723         struct net_device *dev = pdev->attached_dev;
 724         struct switch_dev *swdev;
 725         int ret;
 726
 727         if (!priv) {
 728                 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
 729                 if (priv == NULL)
 730                         return -ENOMEM;
 731         }
 732
 733         priv->phy = pdev;
 734
 735         priv->chip = ar8216_id_chip(priv);
 736
 737         if (pdev->addr != 0) {
 738                 if (priv->chip == AR8316) {
 739                         pdev->supported |= SUPPORTED_1000baseT_Full;
 740                         pdev->advertising |= ADVERTISED_1000baseT_Full;
 741
 742                         /* check if we're attaching to the switch twice */
 743                         pdev = pdev->bus->phy_map[0];
 744                         if (!pdev) {
 745                                 kfree(priv);
 746                                 return 0;
 747                         }
 748
 749                         /* switch device has not been initialized, reuse priv */
 750                         if (!pdev->priv) {
 751                                 priv->port4_phy = true;
 752                                 pdev->priv = priv;
 753                                 return 0;
 754                         }
 755
 756                         kfree(priv);
 757
 758                         /* switch device has been initialized, reinit */
 759                         priv = pdev->priv;
 760                         priv->dev.ports = (AR8216_NUM_PORTS - 1);
 761                         priv->initialized = false;
 762                         priv->port4_phy = true;
 763                         ar8316_hw_init(priv);
 764                         return 0;
 765                 }
 766
 767                 kfree(priv);
 768                 return 0;
 769         }
 770
 771         printk(KERN_INFO "%s: AR%d switch driver attached.\n",
 772                 pdev->attached_dev->name, priv->chip);
 773
 774         pdev->supported = priv->chip == AR8316 ?
 775                 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
 776         pdev->advertising = pdev->supported;
 777
 778         mutex_init(&priv->reg_mutex);
 779         priv->read = ar8216_mii_read;
 780         priv->write = ar8216_mii_write;
 781
 782         pdev->priv = priv;
 783
 784         swdev = &priv->dev;
 785         swdev->cpu_port = AR8216_PORT_CPU;
 786         swdev->ops = &ar8216_ops;
 787         swdev->ports = AR8216_NUM_PORTS;
 788
 789         if (priv->chip == AR8316) {
 790                 swdev->name = "Atheros AR8316";
 791                 swdev->vlans = AR8X16_MAX_VLANS;
 792
 793                 if (priv->port4_phy) {
 794                         /* port 5 connected to the other mac, therefore unusable */
 795                         swdev->ports = (AR8216_NUM_PORTS - 1);
 796                 }
 797         } else {
 798                 swdev->name = "Atheros AR8216";
 799                 swdev->vlans = AR8216_NUM_VLANS;
 800         }
 801
 802         if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
 803                 kfree(priv);
 804                 goto done;
 805         }
 806
 807         if (priv->chip == AR8316) {
 808                 ret = ar8316_hw_init(priv);
 809                 if (ret) {
 810                         kfree(priv);
 811                         goto done;
 812                 }
 813         }
 814
 815         ret = ar8216_reset_switch(&priv->dev);
 816         if (ret) {
 817                 kfree(priv);
 818                 goto done;
 819         }
 820
 821         dev->phy_ptr = priv;
 822
 823         /* VID fixup only needed on ar8216 */
 824         if (pdev->addr == 0 && priv->chip == AR8216) {
 825                 pdev->pkt_align = 2;
 826                 pdev->netif_receive_skb = ar8216_netif_receive_skb;
 827                 pdev->netif_rx = ar8216_netif_rx;
 828                 priv->ndo_old = dev->netdev_ops;
 829                 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
 830                 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
 831                 dev->netdev_ops = &priv->ndo;
 832         }
 833
 834 done:
 835         return ret;
 836 }
 837
 838 static int
 839 ar8216_read_status(struct phy_device *phydev)
 840 {
 841         struct ar8216_priv *priv = phydev->priv;
 842         int ret;
 843         if (phydev->addr != 0) {
 844                 return genphy_read_status(phydev);
 845         }
 846
 847         phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
 848         phydev->duplex = DUPLEX_FULL;
 849         phydev->link = 1;
 850
 851         /* flush the address translation unit */
 852         mutex_lock(&priv->reg_mutex);
 853         ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
 854
 855         if (!ret)
 856                 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
 857         else
 858                 ret = -ETIMEDOUT;
 859         mutex_unlock(&priv->reg_mutex);
 860
 861         phydev->state = PHY_RUNNING;
 862         netif_carrier_on(phydev->attached_dev);
 863         phydev->adjust_link(phydev->attached_dev);
 864
 865         return ret;
 866 }
 867
 868 static int
 869 ar8216_config_aneg(struct phy_device *phydev)
 870 {
 871         if (phydev->addr == 0)
 872                 return 0;
 873
 874         return genphy_config_aneg(phydev);
 875 }
 876
 877 static int
 878 ar8216_probe(struct phy_device *pdev)
 879 {
 880         struct ar8216_priv priv;
 881         u16 chip;
 882
 883         priv.phy = pdev;
 884         chip = ar8216_id_chip(&priv);
 885         if (chip == UNKNOWN)
 886                 return -ENODEV;
 887
 888         return 0;
 889 }
 890
 891 static void
 892 ar8216_remove(struct phy_device *pdev)
 893 {
 894         struct ar8216_priv *priv = pdev->priv;
 895         struct net_device *dev = pdev->attached_dev;
 896
 897         if (!priv)
 898                 return;
 899
 900         if (priv->ndo_old && dev)
 901                 dev->netdev_ops = priv->ndo_old;
 902         if (pdev->addr == 0)
 903                 unregister_switch(&priv->dev);
 904         kfree(priv);
 905 }
 906
 907 static struct phy_driver ar8216_driver = {
 908         .phy_id         = 0x004d0000,
 909         .name           = "Atheros AR8216/AR8316",
 910         .phy_id_mask    = 0xffff0000,
 911         .features       = PHY_BASIC_FEATURES,
 912         .probe          = ar8216_probe,
 913         .remove         = ar8216_remove,
 914         .config_init    = &ar8216_config_init,
 915         .config_aneg    = &ar8216_config_aneg,
 916         .read_status    = &ar8216_read_status,
 917         .driver         = { .owner = THIS_MODULE },
 918 };
 919
 920 int __init
 921 ar8216_init(void)
 922 {
 923         return phy_driver_register(&ar8216_driver);
 924 }
 925
 926 void __exit
 927 ar8216_exit(void)
 928 {
 929         phy_driver_unregister(&ar8216_driver);
 930 }
 931
 932 module_init(ar8216_init);
 933 module_exit(ar8216_exit);
 934 MODULE_LICENSE("GPL");
 935