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         mdiobus_write(phy->bus, 0x18, 0, page);
  83         msleep(1); /* wait for the page switch to propagate */
  84         lo = mdiobus_read(phy->bus, 0x10 | r2, r1);
  85         hi = mdiobus_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         mdiobus_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         mdiobus_write(phy->bus, 0x10 | r2, r1 + 1, hi);
 104         mdiobus_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                         mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
 156                         mdiobus_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 void
 490 ar8216_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
 491                   u32 members, u32 pvid)
 492 {
 493         u32 header;
 494
 495         if (priv->vlan && port == AR8216_PORT_CPU && priv->chip == AR8216)
 496                 header = AR8216_PORT_CTRL_HEADER;
 497         else
 498                 header = 0;
 499
 500         ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
 501                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 502                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 503                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 504                    AR8216_PORT_CTRL_LEARN | header |
 505                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 506                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 507
 508         ar8216_rmw(priv, AR8216_REG_PORT_VLAN(port),
 509                    AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
 510                    AR8216_PORT_VLAN_DEFAULT_ID,
 511                    (members << AR8216_PORT_VLAN_DEST_PORTS_S) |
 512                    (ingress << AR8216_PORT_VLAN_MODE_S) |
 513                    (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
 514 }
 515
 516 static int
 517 ar8216_hw_apply(struct switch_dev *dev)
 518 {
 519         struct ar8216_priv *priv = to_ar8216(dev);
 520         u8 portmask[AR8216_NUM_PORTS];
 521         int i, j;
 522
 523         mutex_lock(&priv->reg_mutex);
 524         /* flush all vlan translation unit entries */
 525         ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
 526
 527         memset(portmask, 0, sizeof(portmask));
 528         if (priv->vlan) {
 529                 /* calculate the port destination masks and load vlans
 530                  * into the vlan translation unit */
 531                 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 532                         u8 vp = priv->vlan_table[j];
 533
 534                         if (!vp)
 535                                 continue;
 536
 537                         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 538                                 u8 mask = (1 << i);
 539                                 if (vp & mask)
 540                                         portmask[i] |= vp & ~mask;
 541                         }
 542
 543                         ar8216_vtu_op(priv,
 544                                 AR8216_VTU_OP_LOAD |
 545                                 (priv->vlan_id[j] << AR8216_VTU_VID_S),
 546                                 priv->vlan_table[j]);
 547                 }
 548         } else {
 549                 /* vlan disabled:
 550                  * isolate all ports, but connect them to the cpu port */
 551                 for (i = 0; i < AR8216_NUM_PORTS; i++) {
 552                         if (i == AR8216_PORT_CPU)
 553                                 continue;
 554
 555                         portmask[i] = 1 << AR8216_PORT_CPU;
 556                         portmask[AR8216_PORT_CPU] |= (1 << i);
 557                 }
 558         }
 559
 560         /* update the port destination mask registers and tag settings */
 561         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 562                 int egress, ingress;
 563                 int pvid;
 564
 565                 if (priv->vlan) {
 566                         pvid = priv->vlan_id[priv->pvid[i]];
 567                 } else {
 568                         pvid = i;
 569                 }
 570
 571                 if (priv->vlan && (priv->vlan_tagged & (1 << i))) {
 572                         egress = AR8216_OUT_ADD_VLAN;
 573                 } else {
 574                         egress = AR8216_OUT_STRIP_VLAN;
 575                 }
 576                 if (priv->vlan) {
 577                         ingress = AR8216_IN_SECURE;
 578                 } else {
 579                         ingress = AR8216_IN_PORT_ONLY;
 580                 }
 581
 582                 ar8216_setup_port(priv, i, egress, ingress, portmask[i], pvid);
 583         }
 584         mutex_unlock(&priv->reg_mutex);
 585         return 0;
 586 }
 587
 588 static int
 589 ar8316_hw_init(struct ar8216_priv *priv) {
 590         int i;
 591         u32 val, newval;
 592         struct mii_bus *bus;
 593
 594         val = priv->read(priv, 0x8);
 595
 596         if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 597                 if (priv->port4_phy) {
 598                         /* value taken from Ubiquiti RouterStation Pro */
 599                         newval = 0x81461bea;
 600                         printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
 601                 } else {
 602                         newval = 0x01261be2;
 603                         printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
 604                 }
 605         } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
 606                 /* value taken from AVM Fritz!Box 7390 sources */
 607                 newval = 0x010e5b71;
 608         } else {
 609                 /* no known value for phy interface */
 610                 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
 611                         priv->phy->interface);
 612                 return -EINVAL;
 613         }
 614
 615         if (val == newval)
 616                 goto out;
 617
 618         priv->write(priv, 0x8, newval);
 619
 620         /* standard atheros magic */
 621         priv->write(priv, 0x38, 0xc000050e);
 622
 623         /* Initialize the ports */
 624         bus = priv->phy->bus;
 625         for (i = 0; i < 5; i++) {
 626                 if ((i == 4) && priv->port4_phy &&
 627                     priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 628                         /* work around for phy4 rgmii mode */
 629                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x12);
 630                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x480c);
 631                         /* rx delay */
 632                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x0);
 633                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x824e);
 634                         /* tx delay */
 635                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x5);
 636                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
 637                         msleep(1000);
 638                 }
 639
 640                 /* initialize the port itself */
 641                 mdiobus_write(bus, i, MII_ADVERTISE,
 642                         ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 643                 mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
 644                 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 645                 msleep(1000);
 646         }
 647
 648 out:
 649         priv->initialized = true;
 650         return 0;
 651 }
 652
 653 static int
 654 ar8216_reset_switch(struct switch_dev *dev)
 655 {
 656         struct ar8216_priv *priv = to_ar8216(dev);
 657         int i;
 658
 659         mutex_lock(&priv->reg_mutex);
 660         memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
 661                 offsetof(struct ar8216_priv, vlan));
 662         for (i = 0; i < AR8X16_MAX_VLANS; i++) {
 663                 priv->vlan_id[i] = i;
 664         }
 665         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 666                 /* Enable port learning and tx */
 667                 priv->write(priv, AR8216_REG_PORT_CTRL(i),
 668                         AR8216_PORT_CTRL_LEARN |
 669                         (4 << AR8216_PORT_CTRL_STATE_S));
 670
 671                 priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
 672
 673                 /* Configure all PHYs */
 674                 if (i == AR8216_PORT_CPU) {
 675                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 676                                 AR8216_PORT_STATUS_LINK_UP |
 677                                 ((priv->chip == AR8316) ?
 678                                         AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
 679                                 AR8216_PORT_STATUS_TXMAC |
 680                                 AR8216_PORT_STATUS_RXMAC |
 681                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
 682                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
 683                                 AR8216_PORT_STATUS_DUPLEX);
 684                 } else {
 685                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 686                                 AR8216_PORT_STATUS_LINK_AUTO);
 687                 }
 688         }
 689         /* XXX: undocumented magic from atheros, required! */
 690         priv->write(priv, 0x38, 0xc000050e);
 691
 692         if (priv->chip == AR8216) {
 693                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 694                         AR8216_GCTRL_MTU, 1518 + 8 + 2);
 695         } else if (priv->chip == AR8316) {
 696                 /* enable jumbo frames */
 697                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 698                         AR8316_GCTRL_MTU, 9018 + 8 + 2);
 699         }
 700
 701         if (priv->chip == AR8316) {
 702                 /* enable cpu port to receive multicast and broadcast frames */
 703                 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
 704         }
 705         mutex_unlock(&priv->reg_mutex);
 706         return ar8216_hw_apply(dev);
 707 }
 708
 709
 710 static const struct switch_dev_ops ar8216_ops = {
 711         .attr_global = {
 712                 .attr = ar8216_globals,
 713                 .n_attr = ARRAY_SIZE(ar8216_globals),
 714         },
 715         .attr_port = {
 716                 .attr = ar8216_port,
 717                 .n_attr = ARRAY_SIZE(ar8216_port),
 718         },
 719         .attr_vlan = {
 720                 .attr = ar8216_vlan,
 721                 .n_attr = ARRAY_SIZE(ar8216_vlan),
 722         },
 723         .get_port_pvid = ar8216_get_pvid,
 724         .set_port_pvid = ar8216_set_pvid,
 725         .get_vlan_ports = ar8216_get_ports,
 726         .set_vlan_ports = ar8216_set_ports,
 727         .apply_config = ar8216_hw_apply,
 728         .reset_switch = ar8216_reset_switch,
 729 };
 730
 731 static int
 732 ar8216_config_init(struct phy_device *pdev)
 733 {
 734         struct ar8216_priv *priv = pdev->priv;
 735         struct net_device *dev = pdev->attached_dev;
 736         struct switch_dev *swdev;
 737         int ret;
 738
 739         if (!priv) {
 740                 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
 741                 if (priv == NULL)
 742                         return -ENOMEM;
 743         }
 744
 745         priv->phy = pdev;
 746
 747         priv->chip = ar8216_id_chip(priv);
 748
 749         if (pdev->addr != 0) {
 750                 if (priv->chip == AR8316) {
 751                         pdev->supported |= SUPPORTED_1000baseT_Full;
 752                         pdev->advertising |= ADVERTISED_1000baseT_Full;
 753
 754                         /* check if we're attaching to the switch twice */
 755                         pdev = pdev->bus->phy_map[0];
 756                         if (!pdev) {
 757                                 kfree(priv);
 758                                 return 0;
 759                         }
 760
 761                         /* switch device has not been initialized, reuse priv */
 762                         if (!pdev->priv) {
 763                                 priv->port4_phy = true;
 764                                 pdev->priv = priv;
 765                                 return 0;
 766                         }
 767
 768                         kfree(priv);
 769
 770                         /* switch device has been initialized, reinit */
 771                         priv = pdev->priv;
 772                         priv->dev.ports = (AR8216_NUM_PORTS - 1);
 773                         priv->initialized = false;
 774                         priv->port4_phy = true;
 775                         ar8316_hw_init(priv);
 776                         return 0;
 777                 }
 778
 779                 kfree(priv);
 780                 return 0;
 781         }
 782
 783         printk(KERN_INFO "%s: AR%d switch driver attached.\n",
 784                 pdev->attached_dev->name, priv->chip);
 785
 786         pdev->supported = priv->chip == AR8316 ?
 787                 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
 788         pdev->advertising = pdev->supported;
 789
 790         mutex_init(&priv->reg_mutex);
 791         priv->read = ar8216_mii_read;
 792         priv->write = ar8216_mii_write;
 793
 794         pdev->priv = priv;
 795
 796         swdev = &priv->dev;
 797         swdev->cpu_port = AR8216_PORT_CPU;
 798         swdev->ops = &ar8216_ops;
 799         swdev->ports = AR8216_NUM_PORTS;
 800
 801         if (priv->chip == AR8316) {
 802                 swdev->name = "Atheros AR8316";
 803                 swdev->vlans = AR8X16_MAX_VLANS;
 804
 805                 if (priv->port4_phy) {
 806                         /* port 5 connected to the other mac, therefore unusable */
 807                         swdev->ports = (AR8216_NUM_PORTS - 1);
 808                 }
 809         } else {
 810                 swdev->name = "Atheros AR8216";
 811                 swdev->vlans = AR8216_NUM_VLANS;
 812         }
 813
 814         if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
 815                 kfree(priv);
 816                 goto done;
 817         }
 818
 819         if (priv->chip == AR8316) {
 820                 ret = ar8316_hw_init(priv);
 821                 if (ret) {
 822                         kfree(priv);
 823                         goto done;
 824                 }
 825         }
 826
 827         ret = ar8216_reset_switch(&priv->dev);
 828         if (ret) {
 829                 kfree(priv);
 830                 goto done;
 831         }
 832
 833         dev->phy_ptr = priv;
 834
 835         /* VID fixup only needed on ar8216 */
 836         if (pdev->addr == 0 && priv->chip == AR8216) {
 837                 pdev->pkt_align = 2;
 838                 pdev->netif_receive_skb = ar8216_netif_receive_skb;
 839                 pdev->netif_rx = ar8216_netif_rx;
 840                 priv->ndo_old = dev->netdev_ops;
 841                 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
 842                 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
 843                 dev->netdev_ops = &priv->ndo;
 844         }
 845
 846 done:
 847         return ret;
 848 }
 849
 850 static int
 851 ar8216_read_status(struct phy_device *phydev)
 852 {
 853         struct ar8216_priv *priv = phydev->priv;
 854         int ret;
 855         if (phydev->addr != 0) {
 856                 return genphy_read_status(phydev);
 857         }
 858
 859         phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
 860         phydev->duplex = DUPLEX_FULL;
 861         phydev->link = 1;
 862
 863         /* flush the address translation unit */
 864         mutex_lock(&priv->reg_mutex);
 865         ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
 866
 867         if (!ret)
 868                 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
 869         else
 870                 ret = -ETIMEDOUT;
 871         mutex_unlock(&priv->reg_mutex);
 872
 873         phydev->state = PHY_RUNNING;
 874         netif_carrier_on(phydev->attached_dev);
 875         phydev->adjust_link(phydev->attached_dev);
 876
 877         return ret;
 878 }
 879
 880 static int
 881 ar8216_config_aneg(struct phy_device *phydev)
 882 {
 883         if (phydev->addr == 0)
 884                 return 0;
 885
 886         return genphy_config_aneg(phydev);
 887 }
 888
 889 static int
 890 ar8216_probe(struct phy_device *pdev)
 891 {
 892         struct ar8216_priv priv;
 893         u16 chip;
 894
 895         priv.phy = pdev;
 896         chip = ar8216_id_chip(&priv);
 897         if (chip == UNKNOWN)
 898                 return -ENODEV;
 899
 900         return 0;
 901 }
 902
 903 static void
 904 ar8216_remove(struct phy_device *pdev)
 905 {
 906         struct ar8216_priv *priv = pdev->priv;
 907         struct net_device *dev = pdev->attached_dev;
 908
 909         if (!priv)
 910                 return;
 911
 912         if (priv->ndo_old && dev)
 913                 dev->netdev_ops = priv->ndo_old;
 914         if (pdev->addr == 0)
 915                 unregister_switch(&priv->dev);
 916         kfree(priv);
 917 }
 918
 919 static struct phy_driver ar8216_driver = {
 920         .phy_id         = 0x004d0000,
 921         .name           = "Atheros AR8216/AR8316",
 922         .phy_id_mask    = 0xffff0000,
 923         .features       = PHY_BASIC_FEATURES,
 924         .probe          = ar8216_probe,
 925         .remove         = ar8216_remove,
 926         .config_init    = &ar8216_config_init,
 927         .config_aneg    = &ar8216_config_aneg,
 928         .read_status    = &ar8216_read_status,
 929         .driver         = { .owner = THIS_MODULE },
 930 };
 931
 932 int __init
 933 ar8216_init(void)
 934 {
 935         return phy_driver_register(&ar8216_driver);
 936 }
 937
 938 void __exit
 939 ar8216_exit(void)
 940 {
 941         phy_driver_unregister(&ar8216_driver);
 942 }
 943
 944 module_init(ar8216_init);
 945 module_exit(ar8216_exit);
 946 MODULE_LICENSE("GPL");
 947