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         bool init;
  52
  53         /* all fields below are cleared on reset */
  54         bool vlan;
  55         u16 vlan_id[AR8X16_MAX_VLANS];
  56         u8 vlan_table[AR8X16_MAX_VLANS];
  57         u8 vlan_tagged;
  58         u16 pvid[AR8216_NUM_PORTS];
  59 };
  60
  61 #define to_ar8216(_dev) container_of(_dev, struct ar8216_priv, dev)
  62
  63 static inline void
  64 split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
  65 {
  66         regaddr >>= 1;
  67         *r1 = regaddr & 0x1e;
  68
  69         regaddr >>= 5;
  70         *r2 = regaddr & 0x7;
  71
  72         regaddr >>= 3;
  73         *page = regaddr & 0x1ff;
  74 }
  75
  76 static u32
  77 ar8216_mii_read(struct ar8216_priv *priv, int reg)
  78 {
  79         struct phy_device *phy = priv->phy;
  80         u16 r1, r2, page;
  81         u16 lo, hi;
  82
  83         split_addr((u32) reg, &r1, &r2, &page);
  84         mdiobus_write(phy->bus, 0x18, 0, page);
  85         msleep(1); /* wait for the page switch to propagate */
  86         lo = mdiobus_read(phy->bus, 0x10 | r2, r1);
  87         hi = mdiobus_read(phy->bus, 0x10 | r2, r1 + 1);
  88
  89         return (hi << 16) | lo;
  90 }
  91
  92 static void
  93 ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
  94 {
  95         struct phy_device *phy = priv->phy;
  96         u16 r1, r2, r3;
  97         u16 lo, hi;
  98
  99         split_addr((u32) reg, &r1, &r2, &r3);
 100         mdiobus_write(phy->bus, 0x18, 0, r3);
 101         msleep(1); /* wait for the page switch to propagate */
 102
 103         lo = val & 0xffff;
 104         hi = (u16) (val >> 16);
 105         mdiobus_write(phy->bus, 0x10 | r2, r1 + 1, hi);
 106         mdiobus_write(phy->bus, 0x10 | r2, r1, lo);
 107 }
 108
 109 static u32
 110 ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 111 {
 112         u32 v;
 113
 114         v = priv->read(priv, reg);
 115         v &= ~mask;
 116         v |= val;
 117         priv->write(priv, reg, v);
 118
 119         return v;
 120 }
 121
 122 static inline int
 123 ar8216_id_chip(struct ar8216_priv *priv)
 124 {
 125         u32 val;
 126         u16 id;
 127         int i;
 128
 129         val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 130         if (val == ~0)
 131                 return UNKNOWN;
 132
 133         id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 134         for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
 135                 u16 t;
 136
 137                 val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 138                 if (val == ~0)
 139                         return UNKNOWN;
 140
 141                 t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 142                 if (t != id)
 143                         return UNKNOWN;
 144         }
 145
 146         switch (id) {
 147         case 0x0101:
 148                 return AR8216;
 149         case 0x0301:
 150                 return AR8236;
 151         case 0x1000:
 152         case 0x1001:
 153                 return AR8316;
 154         default:
 155                 printk(KERN_DEBUG
 156                         "ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
 157                         (int)(id >> AR8216_CTRL_VERSION_S),
 158                         (int)(id & AR8216_CTRL_REVISION),
 159                         mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
 160                         mdiobus_read(priv->phy->bus, priv->phy->addr, 3));
 161
 162                 return UNKNOWN;
 163         }
 164 }
 165
 166 static int
 167 ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 168                 struct switch_val *val)
 169 {
 170         struct ar8216_priv *priv = to_ar8216(dev);
 171         priv->vlan = !!val->value.i;
 172         return 0;
 173 }
 174
 175 static int
 176 ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 177                 struct switch_val *val)
 178 {
 179         struct ar8216_priv *priv = to_ar8216(dev);
 180         val->value.i = priv->vlan;
 181         return 0;
 182 }
 183
 184
 185 static int
 186 ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
 187 {
 188         struct ar8216_priv *priv = to_ar8216(dev);
 189
 190         /* make sure no invalid PVIDs get set */
 191
 192         if (vlan >= dev->vlans)
 193                 return -EINVAL;
 194
 195         priv->pvid[port] = vlan;
 196         return 0;
 197 }
 198
 199 static int
 200 ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
 201 {
 202         struct ar8216_priv *priv = to_ar8216(dev);
 203         *vlan = priv->pvid[port];
 204         return 0;
 205 }
 206
 207 static int
 208 ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
 209                 struct switch_val *val)
 210 {
 211         struct ar8216_priv *priv = to_ar8216(dev);
 212         priv->vlan_id[val->port_vlan] = val->value.i;
 213         return 0;
 214 }
 215
 216 static int
 217 ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
 218                 struct switch_val *val)
 219 {
 220         struct ar8216_priv *priv = to_ar8216(dev);
 221         val->value.i = priv->vlan_id[val->port_vlan];
 222         return 0;
 223 }
 224
 225 static const char *ar8216_speed_str(unsigned speed)
 226 {
 227         switch (speed) {
 228         case AR8216_PORT_SPEED_10M:
 229                 return "10baseT";
 230         case AR8216_PORT_SPEED_100M:
 231                 return "100baseT";
 232         case AR8216_PORT_SPEED_1000M:
 233                 return "1000baseT";
 234         }
 235
 236         return "unknown";
 237 }
 238
 239 static int ar8216_port_get_link(struct switch_dev *dev,
 240                                 const struct switch_attr *attr,
 241                                 struct switch_val *val)
 242 {
 243         struct ar8216_priv *priv = to_ar8216(dev);
 244         u32 len;
 245         u32 status;
 246         int port;
 247
 248         port = val->port_vlan;
 249
 250         memset(priv->buf, '\0', sizeof(priv->buf));
 251         status = priv->read(priv, AR8216_REG_PORT_STATUS(port));
 252
 253         if (status & AR8216_PORT_STATUS_LINK_UP) {
 254                 len = snprintf(priv->buf, sizeof(priv->buf),
 255                                 "port:%d link:up speed:%s %s-duplex %s%s%s",
 256                                 port,
 257                                 ar8216_speed_str((status &
 258                                                   AR8216_PORT_STATUS_SPEED) >>
 259                                                  AR8216_PORT_STATUS_SPEED_S),
 260                                 (status & AR8216_PORT_STATUS_DUPLEX) ?
 261                                         "full" : "half",
 262                                 (status & AR8216_PORT_STATUS_TXFLOW) ?
 263                                         "txflow ": "",
 264                                 (status & AR8216_PORT_STATUS_RXFLOW) ?
 265                                         "rxflow " : "",
 266                                 (status & AR8216_PORT_STATUS_LINK_AUTO) ?
 267                                         "auto ": "");
 268         } else {
 269                 len = snprintf(priv->buf, sizeof(priv->buf), "port:%d link:down",
 270                                 port);
 271         }
 272
 273         val->value.s = priv->buf;
 274         val->len = len;
 275
 276         return 0;
 277 }
 278
 279 static int
 280 ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
 281 {
 282         struct ar8216_priv *priv = dev->phy_ptr;
 283         unsigned char *buf;
 284
 285     if (unlikely(!priv))
 286         goto error;
 287
 288         if (!priv->vlan)
 289                 goto send;
 290
 291         if (unlikely(skb_headroom(skb) < 2)) {
 292                 if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
 293                         goto error;
 294         }
 295
 296         buf = skb_push(skb, 2);
 297         buf[0] = 0x10;
 298         buf[1] = 0x80;
 299
 300 send:
 301         return priv->ndo_old->ndo_start_xmit(skb, dev);
 302
 303 error:
 304         dev_kfree_skb_any(skb);
 305         return 0;
 306 }
 307
 308 static int
 309 ar8216_mangle_rx(struct sk_buff *skb, int napi)
 310 {
 311         struct ar8216_priv *priv;
 312         struct net_device *dev;
 313         unsigned char *buf;
 314         int port, vlan;
 315
 316         dev = skb->dev;
 317         if (!dev)
 318                 goto error;
 319
 320         priv = dev->phy_ptr;
 321         if (!priv)
 322                 goto error;
 323
 324         /* don't strip the header if vlan mode is disabled */
 325         if (!priv->vlan)
 326                 goto recv;
 327
 328         /* strip header, get vlan id */
 329         buf = skb->data;
 330         skb_pull(skb, 2);
 331
 332         /* check for vlan header presence */
 333         if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
 334                 goto recv;
 335
 336         port = buf[0] & 0xf;
 337
 338         /* no need to fix up packets coming from a tagged source */
 339         if (priv->vlan_tagged & (1 << port))
 340                 goto recv;
 341
 342         /* lookup port vid from local table, the switch passes an invalid vlan id */
 343         vlan = priv->vlan_id[priv->pvid[port]];
 344
 345         buf[14 + 2] &= 0xf0;
 346         buf[14 + 2] |= vlan >> 8;
 347         buf[15 + 2] = vlan & 0xff;
 348
 349 recv:
 350         skb->protocol = eth_type_trans(skb, skb->dev);
 351
 352         if (napi)
 353                 return netif_receive_skb(skb);
 354         else
 355                 return netif_rx(skb);
 356
 357 error:
 358         /* no vlan? eat the packet! */
 359         dev_kfree_skb_any(skb);
 360         return NET_RX_DROP;
 361 }
 362
 363 static int
 364 ar8216_netif_rx(struct sk_buff *skb)
 365 {
 366         return ar8216_mangle_rx(skb, 0);
 367 }
 368
 369 static int
 370 ar8216_netif_receive_skb(struct sk_buff *skb)
 371 {
 372         return ar8216_mangle_rx(skb, 1);
 373 }
 374
 375
 376 static struct switch_attr ar8216_globals[] = {
 377         {
 378                 .type = SWITCH_TYPE_INT,
 379                 .name = "enable_vlan",
 380                 .description = "Enable VLAN mode",
 381                 .set = ar8216_set_vlan,
 382                 .get = ar8216_get_vlan,
 383                 .max = 1
 384         },
 385 };
 386
 387 static struct switch_attr ar8216_port[] = {
 388         {
 389                 .type = SWITCH_TYPE_STRING,
 390                 .name = "link",
 391                 .description = "Get port link information",
 392                 .max = 1,
 393                 .set = NULL,
 394                 .get = ar8216_port_get_link,
 395         },
 396 };
 397
 398 static struct switch_attr ar8216_vlan[] = {
 399         {
 400                 .type = SWITCH_TYPE_INT,
 401                 .name = "vid",
 402                 .description = "VLAN ID (0-4094)",
 403                 .set = ar8216_set_vid,
 404                 .get = ar8216_get_vid,
 405                 .max = 4094,
 406         },
 407 };
 408
 409
 410 static int
 411 ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
 412 {
 413         struct ar8216_priv *priv = to_ar8216(dev);
 414         u8 ports = priv->vlan_table[val->port_vlan];
 415         int i;
 416
 417         val->len = 0;
 418         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 419                 struct switch_port *p;
 420
 421                 if (!(ports & (1 << i)))
 422                         continue;
 423
 424                 p = &val->value.ports[val->len++];
 425                 p->id = i;
 426                 if (priv->vlan_tagged & (1 << i))
 427                         p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
 428                 else
 429                         p->flags = 0;
 430         }
 431         return 0;
 432 }
 433
 434 static int
 435 ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
 436 {
 437         struct ar8216_priv *priv = to_ar8216(dev);
 438         u8 *vt = &priv->vlan_table[val->port_vlan];
 439         int i, j;
 440
 441         *vt = 0;
 442         for (i = 0; i < val->len; i++) {
 443                 struct switch_port *p = &val->value.ports[i];
 444
 445                 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
 446                         priv->vlan_tagged |= (1 << p->id);
 447                 else {
 448                         priv->vlan_tagged &= ~(1 << p->id);
 449                         priv->pvid[p->id] = val->port_vlan;
 450
 451                         /* make sure that an untagged port does not
 452                          * appear in other vlans */
 453                         for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 454                                 if (j == val->port_vlan)
 455                                         continue;
 456                                 priv->vlan_table[j] &= ~(1 << p->id);
 457                         }
 458                 }
 459
 460                 *vt |= 1 << p->id;
 461         }
 462         return 0;
 463 }
 464
 465 static int
 466 ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 467 {
 468         int timeout = 20;
 469
 470         while ((priv->read(priv, reg) & mask) != val) {
 471                 if (timeout-- <= 0) {
 472                         printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
 473                         return 1;
 474                 }
 475         }
 476         return 0;
 477 }
 478
 479 static void
 480 ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
 481 {
 482         if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
 483                 return;
 484         if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
 485                 val &= AR8216_VTUDATA_MEMBER;
 486                 val |= AR8216_VTUDATA_VALID;
 487                 priv->write(priv, AR8216_REG_VTU_DATA, val);
 488         }
 489         op |= AR8216_VTU_ACTIVE;
 490         priv->write(priv, AR8216_REG_VTU, op);
 491 }
 492
 493 static void
 494 ar8216_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
 495                   u32 members, u32 pvid)
 496 {
 497         u32 header;
 498
 499         if (priv->vlan && port == AR8216_PORT_CPU && priv->chip == AR8216)
 500                 header = AR8216_PORT_CTRL_HEADER;
 501         else
 502                 header = 0;
 503
 504         ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
 505                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 506                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 507                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 508                    AR8216_PORT_CTRL_LEARN | header |
 509                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 510                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 511
 512         ar8216_rmw(priv, AR8216_REG_PORT_VLAN(port),
 513                    AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
 514                    AR8216_PORT_VLAN_DEFAULT_ID,
 515                    (members << AR8216_PORT_VLAN_DEST_PORTS_S) |
 516                    (ingress << AR8216_PORT_VLAN_MODE_S) |
 517                    (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
 518 }
 519
 520 static void
 521 ar8236_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
 522                   u32 members, u32 pvid)
 523 {
 524         ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
 525                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 526                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 527                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 528                    AR8216_PORT_CTRL_LEARN |
 529                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 530                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 531
 532         ar8216_rmw(priv, AR8236_REG_PORT_VLAN(port),
 533                    AR8236_PORT_VLAN_DEFAULT_ID,
 534                    (pvid << AR8236_PORT_VLAN_DEFAULT_ID_S));
 535
 536         ar8216_rmw(priv, AR8236_REG_PORT_VLAN2(port),
 537                    AR8236_PORT_VLAN2_VLAN_MODE |
 538                    AR8236_PORT_VLAN2_MEMBER,
 539                    (ingress << AR8236_PORT_VLAN2_VLAN_MODE_S) |
 540                    (members << AR8236_PORT_VLAN2_MEMBER_S));
 541 }
 542
 543 static int
 544 ar8216_hw_apply(struct switch_dev *dev)
 545 {
 546         struct ar8216_priv *priv = to_ar8216(dev);
 547         u8 portmask[AR8216_NUM_PORTS];
 548         int i, j;
 549
 550         mutex_lock(&priv->reg_mutex);
 551         /* flush all vlan translation unit entries */
 552         ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
 553
 554         memset(portmask, 0, sizeof(portmask));
 555         if (!priv->init) {
 556                 /* calculate the port destination masks and load vlans
 557                  * into the vlan translation unit */
 558                 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 559                         u8 vp = priv->vlan_table[j];
 560
 561                         if (!vp)
 562                                 continue;
 563
 564                         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 565                                 u8 mask = (1 << i);
 566                                 if (vp & mask)
 567                                         portmask[i] |= vp & ~mask;
 568                         }
 569
 570                         ar8216_vtu_op(priv,
 571                                 AR8216_VTU_OP_LOAD |
 572                                 (priv->vlan_id[j] << AR8216_VTU_VID_S),
 573                                 priv->vlan_table[j]);
 574                 }
 575         } else {
 576                 /* vlan disabled:
 577                  * isolate all ports, but connect them to the cpu port */
 578                 for (i = 0; i < AR8216_NUM_PORTS; i++) {
 579                         if (i == AR8216_PORT_CPU)
 580                                 continue;
 581
 582                         portmask[i] = 1 << AR8216_PORT_CPU;
 583                         portmask[AR8216_PORT_CPU] |= (1 << i);
 584                 }
 585         }
 586
 587         /* update the port destination mask registers and tag settings */
 588         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 589                 int egress, ingress;
 590                 int pvid;
 591
 592                 if (priv->vlan) {
 593                         pvid = priv->vlan_id[priv->pvid[i]];
 594                 } else {
 595                         pvid = i;
 596                 }
 597
 598                 if (priv->vlan) {
 599                         if (priv->vlan_tagged & (1 << i))
 600                                 egress = AR8216_OUT_ADD_VLAN;
 601                         else
 602                                 egress = AR8216_OUT_STRIP_VLAN;
 603                 } else {
 604                         egress = AR8216_OUT_KEEP;
 605                 }
 606                 if (priv->vlan) {
 607                         ingress = AR8216_IN_SECURE;
 608                 } else {
 609                         ingress = AR8216_IN_PORT_ONLY;
 610                 }
 611
 612                 if (priv->chip == AR8236)
 613                         ar8236_setup_port(priv, i, egress, ingress, portmask[i],
 614                                           pvid);
 615                 else
 616                         ar8216_setup_port(priv, i, egress, ingress, portmask[i],
 617                                           pvid);
 618         }
 619         mutex_unlock(&priv->reg_mutex);
 620         return 0;
 621 }
 622
 623 static int
 624 ar8236_hw_init(struct ar8216_priv *priv) {
 625         static int initialized;
 626         int i;
 627         struct mii_bus *bus;
 628
 629         if (initialized)
 630                 return 0;
 631
 632         /* Initialize the PHYs */
 633         bus = priv->phy->bus;
 634         for (i = 0; i < 5; i++) {
 635                 bus->write(bus, i, MII_ADVERTISE,
 636                            ADVERTISE_ALL | ADVERTISE_PAUSE_CAP |
 637                            ADVERTISE_PAUSE_ASYM);
 638                 bus->write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 639         }
 640         msleep(1000);
 641
 642         initialized = true;
 643         return 0;
 644 }
 645
 646 static int
 647 ar8316_hw_init(struct ar8216_priv *priv) {
 648         int i;
 649         u32 val, newval;
 650         struct mii_bus *bus;
 651
 652         val = priv->read(priv, 0x8);
 653
 654         if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 655                 if (priv->port4_phy) {
 656                         /* value taken from Ubiquiti RouterStation Pro */
 657                         newval = 0x81461bea;
 658                         printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
 659                 } else {
 660                         newval = 0x01261be2;
 661                         printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
 662                 }
 663         } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
 664                 /* value taken from AVM Fritz!Box 7390 sources */
 665                 newval = 0x010e5b71;
 666         } else {
 667                 /* no known value for phy interface */
 668                 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
 669                         priv->phy->interface);
 670                 return -EINVAL;
 671         }
 672
 673         if (val == newval)
 674                 goto out;
 675
 676         priv->write(priv, 0x8, newval);
 677
 678         /* standard atheros magic */
 679         priv->write(priv, 0x38, 0xc000050e);
 680
 681         /* Initialize the ports */
 682         bus = priv->phy->bus;
 683         for (i = 0; i < 5; i++) {
 684                 if ((i == 4) && priv->port4_phy &&
 685                     priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 686                         /* work around for phy4 rgmii mode */
 687                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x12);
 688                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x480c);
 689                         /* rx delay */
 690                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x0);
 691                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x824e);
 692                         /* tx delay */
 693                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x5);
 694                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
 695                         msleep(1000);
 696                 }
 697
 698                 /* initialize the port itself */
 699                 mdiobus_write(bus, i, MII_ADVERTISE,
 700                         ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 701                 mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
 702                 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 703                 msleep(1000);
 704         }
 705
 706 out:
 707         priv->initialized = true;
 708         return 0;
 709 }
 710
 711 static int
 712 ar8216_reset_switch(struct switch_dev *dev)
 713 {
 714         struct ar8216_priv *priv = to_ar8216(dev);
 715         int i;
 716
 717         mutex_lock(&priv->reg_mutex);
 718         memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
 719                 offsetof(struct ar8216_priv, vlan));
 720         for (i = 0; i < AR8X16_MAX_VLANS; i++) {
 721                 priv->vlan_id[i] = i;
 722         }
 723         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 724                 /* Enable port learning and tx */
 725                 priv->write(priv, AR8216_REG_PORT_CTRL(i),
 726                         AR8216_PORT_CTRL_LEARN |
 727                         (4 << AR8216_PORT_CTRL_STATE_S));
 728
 729                 priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
 730
 731                 /* Configure all PHYs */
 732                 if (i == AR8216_PORT_CPU) {
 733                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 734                                 AR8216_PORT_STATUS_LINK_UP |
 735                                 ((priv->chip == AR8316) ?
 736                                         AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
 737                                 AR8216_PORT_STATUS_TXMAC |
 738                                 AR8216_PORT_STATUS_RXMAC |
 739                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
 740                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
 741                                 AR8216_PORT_STATUS_DUPLEX);
 742                 } else {
 743                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 744                                 AR8216_PORT_STATUS_LINK_AUTO);
 745                 }
 746         }
 747         /* XXX: undocumented magic from atheros, required! */
 748         priv->write(priv, 0x38, 0xc000050e);
 749
 750         if (priv->chip == AR8216) {
 751                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 752                         AR8216_GCTRL_MTU, 1518 + 8 + 2);
 753         } else if (priv->chip == AR8316 ||
 754                    priv->chip == AR8236) {
 755                 /* enable jumbo frames */
 756                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 757                         AR8316_GCTRL_MTU, 9018 + 8 + 2);
 758         }
 759
 760         if (priv->chip == AR8316) {
 761                 /* enable cpu port to receive multicast and broadcast frames */
 762                 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
 763         }
 764         mutex_unlock(&priv->reg_mutex);
 765         return ar8216_hw_apply(dev);
 766 }
 767
 768
 769 static const struct switch_dev_ops ar8216_ops = {
 770         .attr_global = {
 771                 .attr = ar8216_globals,
 772                 .n_attr = ARRAY_SIZE(ar8216_globals),
 773         },
 774         .attr_port = {
 775                 .attr = ar8216_port,
 776                 .n_attr = ARRAY_SIZE(ar8216_port),
 777         },
 778         .attr_vlan = {
 779                 .attr = ar8216_vlan,
 780                 .n_attr = ARRAY_SIZE(ar8216_vlan),
 781         },
 782         .get_port_pvid = ar8216_get_pvid,
 783         .set_port_pvid = ar8216_set_pvid,
 784         .get_vlan_ports = ar8216_get_ports,
 785         .set_vlan_ports = ar8216_set_ports,
 786         .apply_config = ar8216_hw_apply,
 787         .reset_switch = ar8216_reset_switch,
 788 };
 789
 790 static int
 791 ar8216_config_init(struct phy_device *pdev)
 792 {
 793         struct ar8216_priv *priv = pdev->priv;
 794         struct net_device *dev = pdev->attached_dev;
 795         struct switch_dev *swdev;
 796         int ret;
 797
 798         if (!priv) {
 799                 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
 800                 if (priv == NULL)
 801                         return -ENOMEM;
 802         }
 803
 804         priv->phy = pdev;
 805
 806         priv->chip = ar8216_id_chip(priv);
 807
 808         if (pdev->addr != 0) {
 809                 if (priv->chip == AR8316) {
 810                         pdev->supported |= SUPPORTED_1000baseT_Full;
 811                         pdev->advertising |= ADVERTISED_1000baseT_Full;
 812
 813                         /* check if we're attaching to the switch twice */
 814                         pdev = pdev->bus->phy_map[0];
 815                         if (!pdev) {
 816                                 kfree(priv);
 817                                 return 0;
 818                         }
 819
 820                         /* switch device has not been initialized, reuse priv */
 821                         if (!pdev->priv) {
 822                                 priv->port4_phy = true;
 823                                 pdev->priv = priv;
 824                                 return 0;
 825                         }
 826
 827                         kfree(priv);
 828
 829                         /* switch device has been initialized, reinit */
 830                         priv = pdev->priv;
 831                         priv->dev.ports = (AR8216_NUM_PORTS - 1);
 832                         priv->initialized = false;
 833                         priv->port4_phy = true;
 834                         ar8316_hw_init(priv);
 835                         return 0;
 836                 }
 837
 838                 kfree(priv);
 839                 return 0;
 840         }
 841
 842         printk(KERN_INFO "%s: AR%d switch driver attached.\n",
 843                 pdev->attached_dev->name, priv->chip);
 844
 845         pdev->supported = priv->chip == AR8316 ?
 846                 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
 847         pdev->advertising = pdev->supported;
 848
 849         mutex_init(&priv->reg_mutex);
 850         priv->read = ar8216_mii_read;
 851         priv->write = ar8216_mii_write;
 852
 853         pdev->priv = priv;
 854
 855         swdev = &priv->dev;
 856         swdev->cpu_port = AR8216_PORT_CPU;
 857         swdev->ops = &ar8216_ops;
 858         swdev->ports = AR8216_NUM_PORTS;
 859
 860         if (priv->chip == AR8316) {
 861                 swdev->name = "Atheros AR8316";
 862                 swdev->vlans = AR8X16_MAX_VLANS;
 863
 864                 if (priv->port4_phy) {
 865                         /* port 5 connected to the other mac, therefore unusable */
 866                         swdev->ports = (AR8216_NUM_PORTS - 1);
 867                 }
 868         } else if (priv->chip == AR8236) {
 869                 swdev->name = "Atheros AR8236";
 870                 swdev->vlans = AR8216_NUM_VLANS;
 871                 swdev->ports = AR8216_NUM_PORTS;
 872         } else {
 873                 swdev->name = "Atheros AR8216";
 874                 swdev->vlans = AR8216_NUM_VLANS;
 875         }
 876
 877         if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
 878                 kfree(priv);
 879                 goto done;
 880         }
 881
 882         priv->init = true;
 883
 884         if (priv->chip == AR8316) {
 885                 ret = ar8316_hw_init(priv);
 886                 if (ret) {
 887                         kfree(priv);
 888                         goto done;
 889                 }
 890         }
 891
 892         if (priv->chip == AR8236) {
 893                 ret = ar8236_hw_init(priv);
 894                 if (ret) {
 895                         kfree(priv);
 896                         goto done;
 897                 }
 898         }
 899
 900         ret = ar8216_reset_switch(&priv->dev);
 901         if (ret) {
 902                 kfree(priv);
 903                 goto done;
 904         }
 905
 906         dev->phy_ptr = priv;
 907
 908         /* VID fixup only needed on ar8216 */
 909         if (pdev->addr == 0 && priv->chip == AR8216) {
 910                 pdev->pkt_align = 2;
 911                 pdev->netif_receive_skb = ar8216_netif_receive_skb;
 912                 pdev->netif_rx = ar8216_netif_rx;
 913                 priv->ndo_old = dev->netdev_ops;
 914                 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
 915                 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
 916                 dev->netdev_ops = &priv->ndo;
 917         }
 918
 919         priv->init = false;
 920
 921 done:
 922         return ret;
 923 }
 924
 925 static int
 926 ar8216_read_status(struct phy_device *phydev)
 927 {
 928         struct ar8216_priv *priv = phydev->priv;
 929         int ret;
 930         if (phydev->addr != 0) {
 931                 return genphy_read_status(phydev);
 932         }
 933
 934         phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
 935         phydev->duplex = DUPLEX_FULL;
 936         phydev->link = 1;
 937
 938         /* flush the address translation unit */
 939         mutex_lock(&priv->reg_mutex);
 940         ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
 941
 942         if (!ret)
 943                 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
 944         else
 945                 ret = -ETIMEDOUT;
 946         mutex_unlock(&priv->reg_mutex);
 947
 948         phydev->state = PHY_RUNNING;
 949         netif_carrier_on(phydev->attached_dev);
 950         phydev->adjust_link(phydev->attached_dev);
 951
 952         return ret;
 953 }
 954
 955 static int
 956 ar8216_config_aneg(struct phy_device *phydev)
 957 {
 958         if (phydev->addr == 0)
 959                 return 0;
 960
 961         return genphy_config_aneg(phydev);
 962 }
 963
 964 static int
 965 ar8216_probe(struct phy_device *pdev)
 966 {
 967         struct ar8216_priv priv;
 968         u16 chip;
 969
 970         priv.phy = pdev;
 971         chip = ar8216_id_chip(&priv);
 972         if (chip == UNKNOWN)
 973                 return -ENODEV;
 974
 975         return 0;
 976 }
 977
 978 static void
 979 ar8216_remove(struct phy_device *pdev)
 980 {
 981         struct ar8216_priv *priv = pdev->priv;
 982         struct net_device *dev = pdev->attached_dev;
 983
 984         if (!priv)
 985                 return;
 986
 987         if (priv->ndo_old && dev)
 988                 dev->netdev_ops = priv->ndo_old;
 989         if (pdev->addr == 0)
 990                 unregister_switch(&priv->dev);
 991         kfree(priv);
 992 }
 993
 994 static struct phy_driver ar8216_driver = {
 995         .phy_id         = 0x004d0000,
 996         .name           = "Atheros AR8216/AR8316/AR8326",
 997         .phy_id_mask    = 0xffff0000,
 998         .features       = PHY_BASIC_FEATURES,
 999         .probe          = ar8216_probe,
1000         .remove         = ar8216_remove,
1001         .config_init    = &ar8216_config_init,
1002         .config_aneg    = &ar8216_config_aneg,
1003         .read_status    = &ar8216_read_status,
1004         .driver         = { .owner = THIS_MODULE },
1005 };
1006
1007 int __init
1008 ar8216_init(void)
1009 {
1010         return phy_driver_register(&ar8216_driver);
1011 }
1012
1013 void __exit
1014 ar8216_exit(void)
1015 {
1016         phy_driver_unregister(&ar8216_driver);
1017 }
1018
1019 module_init(ar8216_init);
1020 module_exit(ar8216_exit);
1021 MODULE_LICENSE("GPL");
1022