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         struct mii_bus *bus = phy->bus;
  81         u16 r1, r2, page;
  82         u16 lo, hi;
  83
  84         split_addr((u32) reg, &r1, &r2, &page);
  85
  86         mutex_lock(&bus->mdio_lock);
  87
  88         bus->write(bus, 0x18, 0, page);
  89         msleep(1); /* wait for the page switch to propagate */
  90         lo = bus->read(bus, 0x10 | r2, r1);
  91         hi = bus->read(bus, 0x10 | r2, r1 + 1);
  92
  93         mutex_unlock(&bus->mdio_lock);
  94
  95         return (hi << 16) | lo;
  96 }
  97
  98 static void
  99 ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
 100 {
 101         struct phy_device *phy = priv->phy;
 102         struct mii_bus *bus = phy->bus;
 103         u16 r1, r2, r3;
 104         u16 lo, hi;
 105
 106         split_addr((u32) reg, &r1, &r2, &r3);
 107         lo = val & 0xffff;
 108         hi = (u16) (val >> 16);
 109
 110         mutex_lock(&bus->mdio_lock);
 111
 112         bus->write(bus, 0x18, 0, r3);
 113         msleep(1); /* wait for the page switch to propagate */
 114         bus->write(bus, 0x10 | r2, r1 + 1, hi);
 115         bus->write(bus, 0x10 | r2, r1, lo);
 116
 117         mutex_unlock(&bus->mdio_lock);
 118 }
 119
 120 static u32
 121 ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 122 {
 123         u32 v;
 124
 125         v = priv->read(priv, reg);
 126         v &= ~mask;
 127         v |= val;
 128         priv->write(priv, reg, v);
 129
 130         return v;
 131 }
 132
 133 static inline int
 134 ar8216_id_chip(struct ar8216_priv *priv)
 135 {
 136         u32 val;
 137         u16 id;
 138         int i;
 139
 140         val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 141         if (val == ~0)
 142                 return UNKNOWN;
 143
 144         id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 145         for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
 146                 u16 t;
 147
 148                 val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 149                 if (val == ~0)
 150                         return UNKNOWN;
 151
 152                 t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 153                 if (t != id)
 154                         return UNKNOWN;
 155         }
 156
 157         switch (id) {
 158         case 0x0101:
 159                 return AR8216;
 160         case 0x0301:
 161                 return AR8236;
 162         case 0x1000:
 163         case 0x1001:
 164                 return AR8316;
 165         default:
 166                 printk(KERN_DEBUG
 167                         "ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
 168                         (int)(id >> AR8216_CTRL_VERSION_S),
 169                         (int)(id & AR8216_CTRL_REVISION),
 170                         mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
 171                         mdiobus_read(priv->phy->bus, priv->phy->addr, 3));
 172
 173                 return UNKNOWN;
 174         }
 175 }
 176
 177 static int
 178 ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 179                 struct switch_val *val)
 180 {
 181         struct ar8216_priv *priv = to_ar8216(dev);
 182         priv->vlan = !!val->value.i;
 183         return 0;
 184 }
 185
 186 static int
 187 ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 188                 struct switch_val *val)
 189 {
 190         struct ar8216_priv *priv = to_ar8216(dev);
 191         val->value.i = priv->vlan;
 192         return 0;
 193 }
 194
 195
 196 static int
 197 ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
 198 {
 199         struct ar8216_priv *priv = to_ar8216(dev);
 200
 201         /* make sure no invalid PVIDs get set */
 202
 203         if (vlan >= dev->vlans)
 204                 return -EINVAL;
 205
 206         priv->pvid[port] = vlan;
 207         return 0;
 208 }
 209
 210 static int
 211 ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
 212 {
 213         struct ar8216_priv *priv = to_ar8216(dev);
 214         *vlan = priv->pvid[port];
 215         return 0;
 216 }
 217
 218 static int
 219 ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
 220                 struct switch_val *val)
 221 {
 222         struct ar8216_priv *priv = to_ar8216(dev);
 223         priv->vlan_id[val->port_vlan] = val->value.i;
 224         return 0;
 225 }
 226
 227 static int
 228 ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
 229                 struct switch_val *val)
 230 {
 231         struct ar8216_priv *priv = to_ar8216(dev);
 232         val->value.i = priv->vlan_id[val->port_vlan];
 233         return 0;
 234 }
 235
 236 static const char *ar8216_speed_str(unsigned speed)
 237 {
 238         switch (speed) {
 239         case AR8216_PORT_SPEED_10M:
 240                 return "10baseT";
 241         case AR8216_PORT_SPEED_100M:
 242                 return "100baseT";
 243         case AR8216_PORT_SPEED_1000M:
 244                 return "1000baseT";
 245         }
 246
 247         return "unknown";
 248 }
 249
 250 static int ar8216_port_get_link(struct switch_dev *dev,
 251                                 const struct switch_attr *attr,
 252                                 struct switch_val *val)
 253 {
 254         struct ar8216_priv *priv = to_ar8216(dev);
 255         u32 len;
 256         u32 status;
 257         int port;
 258
 259         port = val->port_vlan;
 260
 261         memset(priv->buf, '\0', sizeof(priv->buf));
 262         status = priv->read(priv, AR8216_REG_PORT_STATUS(port));
 263
 264         if (status & AR8216_PORT_STATUS_LINK_UP) {
 265                 len = snprintf(priv->buf, sizeof(priv->buf),
 266                                 "port:%d link:up speed:%s %s-duplex %s%s%s",
 267                                 port,
 268                                 ar8216_speed_str((status &
 269                                                   AR8216_PORT_STATUS_SPEED) >>
 270                                                  AR8216_PORT_STATUS_SPEED_S),
 271                                 (status & AR8216_PORT_STATUS_DUPLEX) ?
 272                                         "full" : "half",
 273                                 (status & AR8216_PORT_STATUS_TXFLOW) ?
 274                                         "txflow ": "",
 275                                 (status & AR8216_PORT_STATUS_RXFLOW) ?
 276                                         "rxflow " : "",
 277                                 (status & AR8216_PORT_STATUS_LINK_AUTO) ?
 278                                         "auto ": "");
 279         } else {
 280                 len = snprintf(priv->buf, sizeof(priv->buf), "port:%d link:down",
 281                                 port);
 282         }
 283
 284         val->value.s = priv->buf;
 285         val->len = len;
 286
 287         return 0;
 288 }
 289
 290 static int
 291 ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
 292 {
 293         struct ar8216_priv *priv = dev->phy_ptr;
 294         unsigned char *buf;
 295
 296     if (unlikely(!priv))
 297         goto error;
 298
 299         if (!priv->vlan)
 300                 goto send;
 301
 302         if (unlikely(skb_headroom(skb) < 2)) {
 303                 if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
 304                         goto error;
 305         }
 306
 307         buf = skb_push(skb, 2);
 308         buf[0] = 0x10;
 309         buf[1] = 0x80;
 310
 311 send:
 312         return priv->ndo_old->ndo_start_xmit(skb, dev);
 313
 314 error:
 315         dev_kfree_skb_any(skb);
 316         return 0;
 317 }
 318
 319 static int
 320 ar8216_mangle_rx(struct sk_buff *skb, int napi)
 321 {
 322         struct ar8216_priv *priv;
 323         struct net_device *dev;
 324         unsigned char *buf;
 325         int port, vlan;
 326
 327         dev = skb->dev;
 328         if (!dev)
 329                 goto error;
 330
 331         priv = dev->phy_ptr;
 332         if (!priv)
 333                 goto error;
 334
 335         /* don't strip the header if vlan mode is disabled */
 336         if (!priv->vlan)
 337                 goto recv;
 338
 339         /* strip header, get vlan id */
 340         buf = skb->data;
 341         skb_pull(skb, 2);
 342
 343         /* check for vlan header presence */
 344         if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
 345                 goto recv;
 346
 347         port = buf[0] & 0xf;
 348
 349         /* no need to fix up packets coming from a tagged source */
 350         if (priv->vlan_tagged & (1 << port))
 351                 goto recv;
 352
 353         /* lookup port vid from local table, the switch passes an invalid vlan id */
 354         vlan = priv->vlan_id[priv->pvid[port]];
 355
 356         buf[14 + 2] &= 0xf0;
 357         buf[14 + 2] |= vlan >> 8;
 358         buf[15 + 2] = vlan & 0xff;
 359
 360 recv:
 361         skb->protocol = eth_type_trans(skb, skb->dev);
 362
 363         if (napi)
 364                 return netif_receive_skb(skb);
 365         else
 366                 return netif_rx(skb);
 367
 368 error:
 369         /* no vlan? eat the packet! */
 370         dev_kfree_skb_any(skb);
 371         return NET_RX_DROP;
 372 }
 373
 374 static int
 375 ar8216_netif_rx(struct sk_buff *skb)
 376 {
 377         return ar8216_mangle_rx(skb, 0);
 378 }
 379
 380 static int
 381 ar8216_netif_receive_skb(struct sk_buff *skb)
 382 {
 383         return ar8216_mangle_rx(skb, 1);
 384 }
 385
 386
 387 static struct switch_attr ar8216_globals[] = {
 388         {
 389                 .type = SWITCH_TYPE_INT,
 390                 .name = "enable_vlan",
 391                 .description = "Enable VLAN mode",
 392                 .set = ar8216_set_vlan,
 393                 .get = ar8216_get_vlan,
 394                 .max = 1
 395         },
 396 };
 397
 398 static struct switch_attr ar8216_port[] = {
 399         {
 400                 .type = SWITCH_TYPE_STRING,
 401                 .name = "link",
 402                 .description = "Get port link information",
 403                 .max = 1,
 404                 .set = NULL,
 405                 .get = ar8216_port_get_link,
 406         },
 407 };
 408
 409 static struct switch_attr ar8216_vlan[] = {
 410         {
 411                 .type = SWITCH_TYPE_INT,
 412                 .name = "vid",
 413                 .description = "VLAN ID (0-4094)",
 414                 .set = ar8216_set_vid,
 415                 .get = ar8216_get_vid,
 416                 .max = 4094,
 417         },
 418 };
 419
 420
 421 static int
 422 ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
 423 {
 424         struct ar8216_priv *priv = to_ar8216(dev);
 425         u8 ports = priv->vlan_table[val->port_vlan];
 426         int i;
 427
 428         val->len = 0;
 429         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 430                 struct switch_port *p;
 431
 432                 if (!(ports & (1 << i)))
 433                         continue;
 434
 435                 p = &val->value.ports[val->len++];
 436                 p->id = i;
 437                 if (priv->vlan_tagged & (1 << i))
 438                         p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
 439                 else
 440                         p->flags = 0;
 441         }
 442         return 0;
 443 }
 444
 445 static int
 446 ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
 447 {
 448         struct ar8216_priv *priv = to_ar8216(dev);
 449         u8 *vt = &priv->vlan_table[val->port_vlan];
 450         int i, j;
 451
 452         *vt = 0;
 453         for (i = 0; i < val->len; i++) {
 454                 struct switch_port *p = &val->value.ports[i];
 455
 456                 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
 457                         priv->vlan_tagged |= (1 << p->id);
 458                 else {
 459                         priv->vlan_tagged &= ~(1 << p->id);
 460                         priv->pvid[p->id] = val->port_vlan;
 461
 462                         /* make sure that an untagged port does not
 463                          * appear in other vlans */
 464                         for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 465                                 if (j == val->port_vlan)
 466                                         continue;
 467                                 priv->vlan_table[j] &= ~(1 << p->id);
 468                         }
 469                 }
 470
 471                 *vt |= 1 << p->id;
 472         }
 473         return 0;
 474 }
 475
 476 static int
 477 ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 478 {
 479         int timeout = 20;
 480
 481         while ((priv->read(priv, reg) & mask) != val) {
 482                 if (timeout-- <= 0) {
 483                         printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
 484                         return 1;
 485                 }
 486         }
 487         return 0;
 488 }
 489
 490 static void
 491 ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
 492 {
 493         if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
 494                 return;
 495         if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
 496                 val &= AR8216_VTUDATA_MEMBER;
 497                 val |= AR8216_VTUDATA_VALID;
 498                 priv->write(priv, AR8216_REG_VTU_DATA, val);
 499         }
 500         op |= AR8216_VTU_ACTIVE;
 501         priv->write(priv, AR8216_REG_VTU, op);
 502 }
 503
 504 static void
 505 ar8216_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
 506                   u32 members, u32 pvid)
 507 {
 508         u32 header;
 509
 510         if (priv->vlan && port == AR8216_PORT_CPU && priv->chip == AR8216)
 511                 header = AR8216_PORT_CTRL_HEADER;
 512         else
 513                 header = 0;
 514
 515         ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
 516                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 517                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 518                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 519                    AR8216_PORT_CTRL_LEARN | header |
 520                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 521                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 522
 523         ar8216_rmw(priv, AR8216_REG_PORT_VLAN(port),
 524                    AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
 525                    AR8216_PORT_VLAN_DEFAULT_ID,
 526                    (members << AR8216_PORT_VLAN_DEST_PORTS_S) |
 527                    (ingress << AR8216_PORT_VLAN_MODE_S) |
 528                    (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
 529 }
 530
 531 static void
 532 ar8236_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
 533                   u32 members, u32 pvid)
 534 {
 535         ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
 536                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 537                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 538                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 539                    AR8216_PORT_CTRL_LEARN |
 540                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 541                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 542
 543         ar8216_rmw(priv, AR8236_REG_PORT_VLAN(port),
 544                    AR8236_PORT_VLAN_DEFAULT_ID,
 545                    (pvid << AR8236_PORT_VLAN_DEFAULT_ID_S));
 546
 547         ar8216_rmw(priv, AR8236_REG_PORT_VLAN2(port),
 548                    AR8236_PORT_VLAN2_VLAN_MODE |
 549                    AR8236_PORT_VLAN2_MEMBER,
 550                    (ingress << AR8236_PORT_VLAN2_VLAN_MODE_S) |
 551                    (members << AR8236_PORT_VLAN2_MEMBER_S));
 552 }
 553
 554 static int
 555 ar8216_hw_apply(struct switch_dev *dev)
 556 {
 557         struct ar8216_priv *priv = to_ar8216(dev);
 558         u8 portmask[AR8216_NUM_PORTS];
 559         int i, j;
 560
 561         mutex_lock(&priv->reg_mutex);
 562         /* flush all vlan translation unit entries */
 563         ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
 564
 565         memset(portmask, 0, sizeof(portmask));
 566         if (!priv->init) {
 567                 /* calculate the port destination masks and load vlans
 568                  * into the vlan translation unit */
 569                 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 570                         u8 vp = priv->vlan_table[j];
 571
 572                         if (!vp)
 573                                 continue;
 574
 575                         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 576                                 u8 mask = (1 << i);
 577                                 if (vp & mask)
 578                                         portmask[i] |= vp & ~mask;
 579                         }
 580
 581                         ar8216_vtu_op(priv,
 582                                 AR8216_VTU_OP_LOAD |
 583                                 (priv->vlan_id[j] << AR8216_VTU_VID_S),
 584                                 priv->vlan_table[j]);
 585                 }
 586         } else {
 587                 /* vlan disabled:
 588                  * isolate all ports, but connect them to the cpu port */
 589                 for (i = 0; i < AR8216_NUM_PORTS; i++) {
 590                         if (i == AR8216_PORT_CPU)
 591                                 continue;
 592
 593                         portmask[i] = 1 << AR8216_PORT_CPU;
 594                         portmask[AR8216_PORT_CPU] |= (1 << i);
 595                 }
 596         }
 597
 598         /* update the port destination mask registers and tag settings */
 599         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 600                 int egress, ingress;
 601                 int pvid;
 602
 603                 if (priv->vlan) {
 604                         pvid = priv->vlan_id[priv->pvid[i]];
 605                 } else {
 606                         pvid = i;
 607                 }
 608
 609                 if (priv->vlan) {
 610                         if (priv->vlan_tagged & (1 << i))
 611                                 egress = AR8216_OUT_ADD_VLAN;
 612                         else
 613                                 egress = AR8216_OUT_STRIP_VLAN;
 614                 } else {
 615                         egress = AR8216_OUT_KEEP;
 616                 }
 617                 if (priv->vlan) {
 618                         ingress = AR8216_IN_SECURE;
 619                 } else {
 620                         ingress = AR8216_IN_PORT_ONLY;
 621                 }
 622
 623                 if (priv->chip == AR8236)
 624                         ar8236_setup_port(priv, i, egress, ingress, portmask[i],
 625                                           pvid);
 626                 else
 627                         ar8216_setup_port(priv, i, egress, ingress, portmask[i],
 628                                           pvid);
 629         }
 630         mutex_unlock(&priv->reg_mutex);
 631         return 0;
 632 }
 633
 634 static int
 635 ar8236_hw_init(struct ar8216_priv *priv) {
 636         static int initialized;
 637         int i;
 638         struct mii_bus *bus;
 639
 640         if (initialized)
 641                 return 0;
 642
 643         /* Initialize the PHYs */
 644         bus = priv->phy->bus;
 645         for (i = 0; i < 5; i++) {
 646                 bus->write(bus, i, MII_ADVERTISE,
 647                            ADVERTISE_ALL | ADVERTISE_PAUSE_CAP |
 648                            ADVERTISE_PAUSE_ASYM);
 649                 bus->write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 650         }
 651         msleep(1000);
 652
 653         initialized = true;
 654         return 0;
 655 }
 656
 657 static int
 658 ar8316_hw_init(struct ar8216_priv *priv) {
 659         int i;
 660         u32 val, newval;
 661         struct mii_bus *bus;
 662
 663         val = priv->read(priv, 0x8);
 664
 665         if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 666                 if (priv->port4_phy) {
 667                         /* value taken from Ubiquiti RouterStation Pro */
 668                         newval = 0x81461bea;
 669                         printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
 670                 } else {
 671                         newval = 0x01261be2;
 672                         printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
 673                 }
 674         } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
 675                 /* value taken from AVM Fritz!Box 7390 sources */
 676                 newval = 0x010e5b71;
 677         } else {
 678                 /* no known value for phy interface */
 679                 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
 680                         priv->phy->interface);
 681                 return -EINVAL;
 682         }
 683
 684         if (val == newval)
 685                 goto out;
 686
 687         priv->write(priv, 0x8, newval);
 688
 689         /* standard atheros magic */
 690         priv->write(priv, 0x38, 0xc000050e);
 691
 692         /* Initialize the ports */
 693         bus = priv->phy->bus;
 694         for (i = 0; i < 5; i++) {
 695                 if ((i == 4) && priv->port4_phy &&
 696                     priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 697                         /* work around for phy4 rgmii mode */
 698                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x12);
 699                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x480c);
 700                         /* rx delay */
 701                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x0);
 702                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x824e);
 703                         /* tx delay */
 704                         mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x5);
 705                         mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
 706                         msleep(1000);
 707                 }
 708
 709                 /* initialize the port itself */
 710                 mdiobus_write(bus, i, MII_ADVERTISE,
 711                         ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 712                 mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
 713                 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 714                 msleep(1000);
 715         }
 716
 717 out:
 718         priv->initialized = true;
 719         return 0;
 720 }
 721
 722 static int
 723 ar8216_reset_switch(struct switch_dev *dev)
 724 {
 725         struct ar8216_priv *priv = to_ar8216(dev);
 726         int i;
 727
 728         mutex_lock(&priv->reg_mutex);
 729         memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
 730                 offsetof(struct ar8216_priv, vlan));
 731         for (i = 0; i < AR8X16_MAX_VLANS; i++) {
 732                 priv->vlan_id[i] = i;
 733         }
 734         for (i = 0; i < AR8216_NUM_PORTS; i++) {
 735                 /* Enable port learning and tx */
 736                 priv->write(priv, AR8216_REG_PORT_CTRL(i),
 737                         AR8216_PORT_CTRL_LEARN |
 738                         (4 << AR8216_PORT_CTRL_STATE_S));
 739
 740                 priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
 741
 742                 /* Configure all PHYs */
 743                 if (i == AR8216_PORT_CPU) {
 744                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 745                                 AR8216_PORT_STATUS_LINK_UP |
 746                                 ((priv->chip == AR8316) ?
 747                                         AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
 748                                 AR8216_PORT_STATUS_TXMAC |
 749                                 AR8216_PORT_STATUS_RXMAC |
 750                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
 751                                 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
 752                                 AR8216_PORT_STATUS_DUPLEX);
 753                 } else {
 754                         priv->write(priv, AR8216_REG_PORT_STATUS(i),
 755                                 AR8216_PORT_STATUS_LINK_AUTO);
 756                 }
 757         }
 758         /* XXX: undocumented magic from atheros, required! */
 759         priv->write(priv, 0x38, 0xc000050e);
 760
 761         if (priv->chip == AR8216) {
 762                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 763                         AR8216_GCTRL_MTU, 1518 + 8 + 2);
 764         } else if (priv->chip == AR8316 ||
 765                    priv->chip == AR8236) {
 766                 /* enable jumbo frames */
 767                 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 768                         AR8316_GCTRL_MTU, 9018 + 8 + 2);
 769         }
 770
 771         if (priv->chip == AR8316) {
 772                 /* enable cpu port to receive multicast and broadcast frames */
 773                 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
 774         }
 775         mutex_unlock(&priv->reg_mutex);
 776         return ar8216_hw_apply(dev);
 777 }
 778
 779
 780 static const struct switch_dev_ops ar8216_ops = {
 781         .attr_global = {
 782                 .attr = ar8216_globals,
 783                 .n_attr = ARRAY_SIZE(ar8216_globals),
 784         },
 785         .attr_port = {
 786                 .attr = ar8216_port,
 787                 .n_attr = ARRAY_SIZE(ar8216_port),
 788         },
 789         .attr_vlan = {
 790                 .attr = ar8216_vlan,
 791                 .n_attr = ARRAY_SIZE(ar8216_vlan),
 792         },
 793         .get_port_pvid = ar8216_get_pvid,
 794         .set_port_pvid = ar8216_set_pvid,
 795         .get_vlan_ports = ar8216_get_ports,
 796         .set_vlan_ports = ar8216_set_ports,
 797         .apply_config = ar8216_hw_apply,
 798         .reset_switch = ar8216_reset_switch,
 799 };
 800
 801 static int
 802 ar8216_config_init(struct phy_device *pdev)
 803 {
 804         struct ar8216_priv *priv = pdev->priv;
 805         struct net_device *dev = pdev->attached_dev;
 806         struct switch_dev *swdev;
 807         int ret;
 808
 809         if (!priv) {
 810                 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
 811                 if (priv == NULL)
 812                         return -ENOMEM;
 813         }
 814
 815         priv->phy = pdev;
 816
 817         priv->chip = ar8216_id_chip(priv);
 818
 819         if (pdev->addr != 0) {
 820                 if (priv->chip == AR8316) {
 821                         pdev->supported |= SUPPORTED_1000baseT_Full;
 822                         pdev->advertising |= ADVERTISED_1000baseT_Full;
 823
 824                         /* check if we're attaching to the switch twice */
 825                         pdev = pdev->bus->phy_map[0];
 826                         if (!pdev) {
 827                                 kfree(priv);
 828                                 return 0;
 829                         }
 830
 831                         /* switch device has not been initialized, reuse priv */
 832                         if (!pdev->priv) {
 833                                 priv->port4_phy = true;
 834                                 pdev->priv = priv;
 835                                 return 0;
 836                         }
 837
 838                         kfree(priv);
 839
 840                         /* switch device has been initialized, reinit */
 841                         priv = pdev->priv;
 842                         priv->dev.ports = (AR8216_NUM_PORTS - 1);
 843                         priv->initialized = false;
 844                         priv->port4_phy = true;
 845                         ar8316_hw_init(priv);
 846                         return 0;
 847                 }
 848
 849                 kfree(priv);
 850                 return 0;
 851         }
 852
 853         printk(KERN_INFO "%s: AR%d switch driver attached.\n",
 854                 pdev->attached_dev->name, priv->chip);
 855
 856         pdev->supported = priv->chip == AR8316 ?
 857                 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
 858         pdev->advertising = pdev->supported;
 859
 860         mutex_init(&priv->reg_mutex);
 861         priv->read = ar8216_mii_read;
 862         priv->write = ar8216_mii_write;
 863
 864         pdev->priv = priv;
 865
 866         swdev = &priv->dev;
 867         swdev->cpu_port = AR8216_PORT_CPU;
 868         swdev->ops = &ar8216_ops;
 869         swdev->ports = AR8216_NUM_PORTS;
 870
 871         if (priv->chip == AR8316) {
 872                 swdev->name = "Atheros AR8316";
 873                 swdev->vlans = AR8X16_MAX_VLANS;
 874
 875                 if (priv->port4_phy) {
 876                         /* port 5 connected to the other mac, therefore unusable */
 877                         swdev->ports = (AR8216_NUM_PORTS - 1);
 878                 }
 879         } else if (priv->chip == AR8236) {
 880                 swdev->name = "Atheros AR8236";
 881                 swdev->vlans = AR8216_NUM_VLANS;
 882                 swdev->ports = AR8216_NUM_PORTS;
 883         } else {
 884                 swdev->name = "Atheros AR8216";
 885                 swdev->vlans = AR8216_NUM_VLANS;
 886         }
 887
 888         if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
 889                 kfree(priv);
 890                 goto done;
 891         }
 892
 893         priv->init = true;
 894
 895         if (priv->chip == AR8316) {
 896                 ret = ar8316_hw_init(priv);
 897                 if (ret) {
 898                         kfree(priv);
 899                         goto done;
 900                 }
 901         }
 902
 903         if (priv->chip == AR8236) {
 904                 ret = ar8236_hw_init(priv);
 905                 if (ret) {
 906                         kfree(priv);
 907                         goto done;
 908                 }
 909         }
 910
 911         ret = ar8216_reset_switch(&priv->dev);
 912         if (ret) {
 913                 kfree(priv);
 914                 goto done;
 915         }
 916
 917         dev->phy_ptr = priv;
 918
 919         /* VID fixup only needed on ar8216 */
 920         if (pdev->addr == 0 && priv->chip == AR8216) {
 921                 pdev->pkt_align = 2;
 922                 pdev->netif_receive_skb = ar8216_netif_receive_skb;
 923                 pdev->netif_rx = ar8216_netif_rx;
 924                 priv->ndo_old = dev->netdev_ops;
 925                 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
 926                 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
 927                 dev->netdev_ops = &priv->ndo;
 928         }
 929
 930         priv->init = false;
 931
 932 done:
 933         return ret;
 934 }
 935
 936 static int
 937 ar8216_read_status(struct phy_device *phydev)
 938 {
 939         struct ar8216_priv *priv = phydev->priv;
 940         int ret;
 941         if (phydev->addr != 0) {
 942                 return genphy_read_status(phydev);
 943         }
 944
 945         phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
 946         phydev->duplex = DUPLEX_FULL;
 947         phydev->link = 1;
 948
 949         /* flush the address translation unit */
 950         mutex_lock(&priv->reg_mutex);
 951         ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
 952
 953         if (!ret)
 954                 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
 955         else
 956                 ret = -ETIMEDOUT;
 957         mutex_unlock(&priv->reg_mutex);
 958
 959         phydev->state = PHY_RUNNING;
 960         netif_carrier_on(phydev->attached_dev);
 961         phydev->adjust_link(phydev->attached_dev);
 962
 963         return ret;
 964 }
 965
 966 static int
 967 ar8216_config_aneg(struct phy_device *phydev)
 968 {
 969         if (phydev->addr == 0)
 970                 return 0;
 971
 972         return genphy_config_aneg(phydev);
 973 }
 974
 975 static int
 976 ar8216_probe(struct phy_device *pdev)
 977 {
 978         struct ar8216_priv priv;
 979         u16 chip;
 980
 981         priv.phy = pdev;
 982         chip = ar8216_id_chip(&priv);
 983         if (chip == UNKNOWN)
 984                 return -ENODEV;
 985
 986         return 0;
 987 }
 988
 989 static void
 990 ar8216_remove(struct phy_device *pdev)
 991 {
 992         struct ar8216_priv *priv = pdev->priv;
 993         struct net_device *dev = pdev->attached_dev;
 994
 995         if (!priv)
 996                 return;
 997
 998         if (priv->ndo_old && dev)
 999                 dev->netdev_ops = priv->ndo_old;
1000         if (pdev->addr == 0)
1001                 unregister_switch(&priv->dev);
1002         kfree(priv);
1003 }
1004
1005 static struct phy_driver ar8216_driver = {
1006         .phy_id         = 0x004d0000,
1007         .name           = "Atheros AR8216/AR8236/AR8316",
1008         .phy_id_mask    = 0xffff0000,
1009         .features       = PHY_BASIC_FEATURES,
1010         .probe          = ar8216_probe,
1011         .remove         = ar8216_remove,
1012         .config_init    = &ar8216_config_init,
1013         .config_aneg    = &ar8216_config_aneg,
1014         .read_status    = &ar8216_read_status,
1015         .driver         = { .owner = THIS_MODULE },
1016 };
1017
1018 int __init
1019 ar8216_init(void)
1020 {
1021         return phy_driver_register(&ar8216_driver);
1022 }
1023
1024 void __exit
1025 ar8216_exit(void)
1026 {
1027         phy_driver_unregister(&ar8216_driver);
1028 }
1029
1030 module_init(ar8216_init);
1031 module_exit(ar8216_exit);
1032 MODULE_LICENSE("GPL");
1033