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