net/dsa/dsa.c

   1 /*
   2  * net/dsa/dsa.c - Hardware switch handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/list.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/slab.h>
  15 #include <linux/module.h>
  16 #include <net/dsa.h>
  17 #include <linux/of.h>
  18 #include <linux/of_mdio.h>
  19 #include <linux/of_platform.h>
  20 #include "dsa_priv.h"
  21
  22 char dsa_driver_version[] = "0.1";
  23
  24
  25 /* switch driver registration ***********************************************/
  26 static DEFINE_MUTEX(dsa_switch_drivers_mutex);
  27 static LIST_HEAD(dsa_switch_drivers);
  28
  29 void register_switch_driver(struct dsa_switch_driver *drv)
  30 {
  31         mutex_lock(&dsa_switch_drivers_mutex);
  32         list_add_tail(&drv->list, &dsa_switch_drivers);
  33         mutex_unlock(&dsa_switch_drivers_mutex);
  34 }
  35 EXPORT_SYMBOL_GPL(register_switch_driver);
  36
  37 void unregister_switch_driver(struct dsa_switch_driver *drv)
  38 {
  39         mutex_lock(&dsa_switch_drivers_mutex);
  40         list_del_init(&drv->list);
  41         mutex_unlock(&dsa_switch_drivers_mutex);
  42 }
  43 EXPORT_SYMBOL_GPL(unregister_switch_driver);
  44
  45 static struct dsa_switch_driver *
  46 dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name)
  47 {
  48         struct dsa_switch_driver *ret;
  49         struct list_head *list;
  50         char *name;
  51
  52         ret = NULL;
  53         name = NULL;
  54
  55         mutex_lock(&dsa_switch_drivers_mutex);
  56         list_for_each(list, &dsa_switch_drivers) {
  57                 struct dsa_switch_driver *drv;
  58
  59                 drv = list_entry(list, struct dsa_switch_driver, list);
  60
  61                 name = drv->probe(host_dev, sw_addr);
  62                 if (name != NULL) {
  63                         ret = drv;
  64                         break;
  65                 }
  66         }
  67         mutex_unlock(&dsa_switch_drivers_mutex);
  68
  69         *_name = name;
  70
  71         return ret;
  72 }
  73
  74
  75 /* basic switch operations **************************************************/
  76 static struct dsa_switch *
  77 dsa_switch_setup(struct dsa_switch_tree *dst, int index,
  78                  struct device *parent, struct device *host_dev)
  79 {
  80         struct dsa_chip_data *pd = dst->pd->chip + index;
  81         struct dsa_switch_driver *drv;
  82         struct dsa_switch *ds;
  83         int ret;
  84         char *name;
  85         int i;
  86         bool valid_name_found = false;
  87
  88         /*
  89          * Probe for switch model.
  90          */
  91         drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
  92         if (drv == NULL) {
  93                 printk(KERN_ERR "%s[%d]: could not detect attached switch\n",
  94                        dst->master_netdev->name, index);
  95                 return ERR_PTR(-EINVAL);
  96         }
  97         printk(KERN_INFO "%s[%d]: detected a %s switch\n",
  98                 dst->master_netdev->name, index, name);
  99
 100
 101         /*
 102          * Allocate and initialise switch state.
 103          */
 104         ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
 105         if (ds == NULL)
 106                 return ERR_PTR(-ENOMEM);
 107
 108         ds->dst = dst;
 109         ds->index = index;
 110         ds->pd = dst->pd->chip + index;
 111         ds->drv = drv;
 112         ds->master_dev = host_dev;
 113
 114         /*
 115          * Validate supplied switch configuration.
 116          */
 117         for (i = 0; i < DSA_MAX_PORTS; i++) {
 118                 char *name;
 119
 120                 name = pd->port_names[i];
 121                 if (name == NULL)
 122                         continue;
 123
 124                 if (!strcmp(name, "cpu")) {
 125                         if (dst->cpu_switch != -1) {
 126                                 printk(KERN_ERR "multiple cpu ports?!\n");
 127                                 ret = -EINVAL;
 128                                 goto out;
 129                         }
 130                         dst->cpu_switch = index;
 131                         dst->cpu_port = i;
 132                 } else if (!strcmp(name, "dsa")) {
 133                         ds->dsa_port_mask |= 1 << i;
 134                 } else {
 135                         ds->phys_port_mask |= 1 << i;
 136                 }
 137                 valid_name_found = true;
 138         }
 139
 140         if (!valid_name_found && i == DSA_MAX_PORTS) {
 141                 ret = -EINVAL;
 142                 goto out;
 143         }
 144
 145         /* Make the built-in MII bus mask match the number of ports,
 146          * switch drivers can override this later
 147          */
 148         ds->phys_mii_mask = ds->phys_port_mask;
 149
 150         /*
 151          * If the CPU connects to this switch, set the switch tree
 152          * tagging protocol to the preferred tagging format of this
 153          * switch.
 154          */
 155         if (dst->cpu_switch == index) {
 156                 switch (drv->tag_protocol) {
 157 #ifdef CONFIG_NET_DSA_TAG_DSA
 158                 case DSA_TAG_PROTO_DSA:
 159                         dst->rcv = dsa_netdev_ops.rcv;
 160                         break;
 161 #endif
 162 #ifdef CONFIG_NET_DSA_TAG_EDSA
 163                 case DSA_TAG_PROTO_EDSA:
 164                         dst->rcv = edsa_netdev_ops.rcv;
 165                         break;
 166 #endif
 167 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 168                 case DSA_TAG_PROTO_TRAILER:
 169                         dst->rcv = trailer_netdev_ops.rcv;
 170                         break;
 171 #endif
 172 #ifdef CONFIG_NET_DSA_TAG_BRCM
 173                 case DSA_TAG_PROTO_BRCM:
 174                         dst->rcv = brcm_netdev_ops.rcv;
 175                         break;
 176 #endif
 177                 default:
 178                         break;
 179                 }
 180
 181                 dst->tag_protocol = drv->tag_protocol;
 182         }
 183
 184         /*
 185          * Do basic register setup.
 186          */
 187         ret = drv->setup(ds);
 188         if (ret < 0)
 189                 goto out;
 190
 191         ret = drv->set_addr(ds, dst->master_netdev->dev_addr);
 192         if (ret < 0)
 193                 goto out;
 194
 195         ds->slave_mii_bus = mdiobus_alloc();
 196         if (ds->slave_mii_bus == NULL) {
 197                 ret = -ENOMEM;
 198                 goto out;
 199         }
 200         dsa_slave_mii_bus_init(ds);
 201
 202         ret = mdiobus_register(ds->slave_mii_bus);
 203         if (ret < 0)
 204                 goto out_free;
 205
 206
 207         /*
 208          * Create network devices for physical switch ports.
 209          */
 210         for (i = 0; i < DSA_MAX_PORTS; i++) {
 211                 struct net_device *slave_dev;
 212
 213                 if (!(ds->phys_port_mask & (1 << i)))
 214                         continue;
 215
 216                 slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]);
 217                 if (slave_dev == NULL) {
 218                         printk(KERN_ERR "%s[%d]: can't create dsa "
 219                                "slave device for port %d(%s)\n",
 220                                dst->master_netdev->name,
 221                                index, i, pd->port_names[i]);
 222                         continue;
 223                 }
 224
 225                 ds->ports[i] = slave_dev;
 226         }
 227
 228         return ds;
 229
 230 out_free:
 231         mdiobus_free(ds->slave_mii_bus);
 232 out:
 233         kfree(ds);
 234         return ERR_PTR(ret);
 235 }
 236
 237 static void dsa_switch_destroy(struct dsa_switch *ds)
 238 {
 239 }
 240
 241 #ifdef CONFIG_PM_SLEEP
 242 static int dsa_switch_suspend(struct dsa_switch *ds)
 243 {
 244         int i, ret = 0;
 245
 246         /* Suspend slave network devices */
 247         for (i = 0; i < DSA_MAX_PORTS; i++) {
 248                 if (!(ds->phys_port_mask & (1 << i)))
 249                         continue;
 250
 251                 ret = dsa_slave_suspend(ds->ports[i]);
 252                 if (ret)
 253                         return ret;
 254         }
 255
 256         if (ds->drv->suspend)
 257                 ret = ds->drv->suspend(ds);
 258
 259         return ret;
 260 }
 261
 262 static int dsa_switch_resume(struct dsa_switch *ds)
 263 {
 264         int i, ret = 0;
 265
 266         if (ds->drv->resume)
 267                 ret = ds->drv->resume(ds);
 268
 269         if (ret)
 270                 return ret;
 271
 272         /* Resume slave network devices */
 273         for (i = 0; i < DSA_MAX_PORTS; i++) {
 274                 if (!(ds->phys_port_mask & (1 << i)))
 275                         continue;
 276
 277                 ret = dsa_slave_resume(ds->ports[i]);
 278                 if (ret)
 279                         return ret;
 280         }
 281
 282         return 0;
 283 }
 284 #endif
 285
 286
 287 /* link polling *************************************************************/
 288 static void dsa_link_poll_work(struct work_struct *ugly)
 289 {
 290         struct dsa_switch_tree *dst;
 291         int i;
 292
 293         dst = container_of(ugly, struct dsa_switch_tree, link_poll_work);
 294
 295         for (i = 0; i < dst->pd->nr_chips; i++) {
 296                 struct dsa_switch *ds = dst->ds[i];
 297
 298                 if (ds != NULL && ds->drv->poll_link != NULL)
 299                         ds->drv->poll_link(ds);
 300         }
 301
 302         mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ));
 303 }
 304
 305 static void dsa_link_poll_timer(unsigned long _dst)
 306 {
 307         struct dsa_switch_tree *dst = (void *)_dst;
 308
 309         schedule_work(&dst->link_poll_work);
 310 }
 311
 312
 313 /* platform driver init and cleanup *****************************************/
 314 static int dev_is_class(struct device *dev, void *class)
 315 {
 316         if (dev->class != NULL && !strcmp(dev->class->name, class))
 317                 return 1;
 318
 319         return 0;
 320 }
 321
 322 static struct device *dev_find_class(struct device *parent, char *class)
 323 {
 324         if (dev_is_class(parent, class)) {
 325                 get_device(parent);
 326                 return parent;
 327         }
 328
 329         return device_find_child(parent, class, dev_is_class);
 330 }
 331
 332 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 333 {
 334         struct device *d;
 335
 336         d = dev_find_class(dev, "mdio_bus");
 337         if (d != NULL) {
 338                 struct mii_bus *bus;
 339
 340                 bus = to_mii_bus(d);
 341                 put_device(d);
 342
 343                 return bus;
 344         }
 345
 346         return NULL;
 347 }
 348 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 349
 350 static struct net_device *dev_to_net_device(struct device *dev)
 351 {
 352         struct device *d;
 353
 354         d = dev_find_class(dev, "net");
 355         if (d != NULL) {
 356                 struct net_device *nd;
 357
 358                 nd = to_net_dev(d);
 359                 dev_hold(nd);
 360                 put_device(d);
 361
 362                 return nd;
 363         }
 364
 365         return NULL;
 366 }
 367
 368 #ifdef CONFIG_OF
 369 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 370                                         struct dsa_chip_data *cd,
 371                                         int chip_index,
 372                                         struct device_node *link)
 373 {
 374         int ret;
 375         const __be32 *reg;
 376         int link_port_addr;
 377         int link_sw_addr;
 378         struct device_node *parent_sw;
 379         int len;
 380
 381         parent_sw = of_get_parent(link);
 382         if (!parent_sw)
 383                 return -EINVAL;
 384
 385         reg = of_get_property(parent_sw, "reg", &len);
 386         if (!reg || (len != sizeof(*reg) * 2))
 387                 return -EINVAL;
 388
 389         link_sw_addr = be32_to_cpup(reg + 1);
 390
 391         if (link_sw_addr >= pd->nr_chips)
 392                 return -EINVAL;
 393
 394         /* First time routing table allocation */
 395         if (!cd->rtable) {
 396                 cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL);
 397                 if (!cd->rtable)
 398                         return -ENOMEM;
 399
 400                 /* default to no valid uplink/downlink */
 401                 memset(cd->rtable, -1, pd->nr_chips * sizeof(s8));
 402         }
 403
 404         reg = of_get_property(link, "reg", NULL);
 405         if (!reg) {
 406                 ret = -EINVAL;
 407                 goto out;
 408         }
 409
 410         link_port_addr = be32_to_cpup(reg);
 411
 412         cd->rtable[link_sw_addr] = link_port_addr;
 413
 414         return 0;
 415 out:
 416         kfree(cd->rtable);
 417         return ret;
 418 }
 419
 420 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 421 {
 422         int i;
 423         int port_index;
 424
 425         for (i = 0; i < pd->nr_chips; i++) {
 426                 port_index = 0;
 427                 while (port_index < DSA_MAX_PORTS) {
 428                         kfree(pd->chip[i].port_names[port_index]);
 429                         port_index++;
 430                 }
 431                 kfree(pd->chip[i].rtable);
 432         }
 433         kfree(pd->chip);
 434 }
 435
 436 static int dsa_of_probe(struct platform_device *pdev)
 437 {
 438         struct device_node *np = pdev->dev.of_node;
 439         struct device_node *child, *mdio, *ethernet, *port, *link;
 440         struct mii_bus *mdio_bus;
 441         struct platform_device *ethernet_dev;
 442         struct dsa_platform_data *pd;
 443         struct dsa_chip_data *cd;
 444         const char *port_name;
 445         int chip_index, port_index;
 446         const unsigned int *sw_addr, *port_reg;
 447         int ret;
 448
 449         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 450         if (!mdio)
 451                 return -EINVAL;
 452
 453         mdio_bus = of_mdio_find_bus(mdio);
 454         if (!mdio_bus)
 455                 return -EINVAL;
 456
 457         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 458         if (!ethernet)
 459                 return -EINVAL;
 460
 461         ethernet_dev = of_find_device_by_node(ethernet);
 462         if (!ethernet_dev)
 463                 return -ENODEV;
 464
 465         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 466         if (!pd)
 467                 return -ENOMEM;
 468
 469         pdev->dev.platform_data = pd;
 470         pd->netdev = &ethernet_dev->dev;
 471         pd->nr_chips = of_get_child_count(np);
 472         if (pd->nr_chips > DSA_MAX_SWITCHES)
 473                 pd->nr_chips = DSA_MAX_SWITCHES;
 474
 475         pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data),
 476                         GFP_KERNEL);
 477         if (!pd->chip) {
 478                 ret = -ENOMEM;
 479                 goto out_free;
 480         }
 481
 482         chip_index = -1;
 483         for_each_available_child_of_node(np, child) {
 484                 chip_index++;
 485                 cd = &pd->chip[chip_index];
 486
 487                 cd->of_node = child;
 488                 cd->host_dev = &mdio_bus->dev;
 489
 490                 sw_addr = of_get_property(child, "reg", NULL);
 491                 if (!sw_addr)
 492                         continue;
 493
 494                 cd->sw_addr = be32_to_cpup(sw_addr);
 495                 if (cd->sw_addr > PHY_MAX_ADDR)
 496                         continue;
 497
 498                 for_each_available_child_of_node(child, port) {
 499                         port_reg = of_get_property(port, "reg", NULL);
 500                         if (!port_reg)
 501                                 continue;
 502
 503                         port_index = be32_to_cpup(port_reg);
 504
 505                         port_name = of_get_property(port, "label", NULL);
 506                         if (!port_name)
 507                                 continue;
 508
 509                         cd->port_dn[port_index] = port;
 510
 511                         cd->port_names[port_index] = kstrdup(port_name,
 512                                         GFP_KERNEL);
 513                         if (!cd->port_names[port_index]) {
 514                                 ret = -ENOMEM;
 515                                 goto out_free_chip;
 516                         }
 517
 518                         link = of_parse_phandle(port, "link", 0);
 519
 520                         if (!strcmp(port_name, "dsa") && link &&
 521                                         pd->nr_chips > 1) {
 522                                 ret = dsa_of_setup_routing_table(pd, cd,
 523                                                 chip_index, link);
 524                                 if (ret)
 525                                         goto out_free_chip;
 526                         }
 527
 528                         if (port_index == DSA_MAX_PORTS)
 529                                 break;
 530                 }
 531         }
 532
 533         return 0;
 534
 535 out_free_chip:
 536         dsa_of_free_platform_data(pd);
 537 out_free:
 538         kfree(pd);
 539         pdev->dev.platform_data = NULL;
 540         return ret;
 541 }
 542
 543 static void dsa_of_remove(struct platform_device *pdev)
 544 {
 545         struct dsa_platform_data *pd = pdev->dev.platform_data;
 546
 547         if (!pdev->dev.of_node)
 548                 return;
 549
 550         dsa_of_free_platform_data(pd);
 551         kfree(pd);
 552 }
 553 #else
 554 static inline int dsa_of_probe(struct platform_device *pdev)
 555 {
 556         return 0;
 557 }
 558
 559 static inline void dsa_of_remove(struct platform_device *pdev)
 560 {
 561 }
 562 #endif
 563
 564 static int dsa_probe(struct platform_device *pdev)
 565 {
 566         static int dsa_version_printed;
 567         struct dsa_platform_data *pd = pdev->dev.platform_data;
 568         struct net_device *dev;
 569         struct dsa_switch_tree *dst;
 570         int i, ret;
 571
 572         if (!dsa_version_printed++)
 573                 printk(KERN_NOTICE "Distributed Switch Architecture "
 574                         "driver version %s\n", dsa_driver_version);
 575
 576         if (pdev->dev.of_node) {
 577                 ret = dsa_of_probe(pdev);
 578                 if (ret)
 579                         return ret;
 580
 581                 pd = pdev->dev.platform_data;
 582         }
 583
 584         if (pd == NULL || pd->netdev == NULL)
 585                 return -EINVAL;
 586
 587         dev = dev_to_net_device(pd->netdev);
 588         if (dev == NULL) {
 589                 ret = -EINVAL;
 590                 goto out;
 591         }
 592
 593         if (dev->dsa_ptr != NULL) {
 594                 dev_put(dev);
 595                 ret = -EEXIST;
 596                 goto out;
 597         }
 598
 599         dst = kzalloc(sizeof(*dst), GFP_KERNEL);
 600         if (dst == NULL) {
 601                 dev_put(dev);
 602                 ret = -ENOMEM;
 603                 goto out;
 604         }
 605
 606         platform_set_drvdata(pdev, dst);
 607
 608         dst->pd = pd;
 609         dst->master_netdev = dev;
 610         dst->cpu_switch = -1;
 611         dst->cpu_port = -1;
 612
 613         for (i = 0; i < pd->nr_chips; i++) {
 614                 struct dsa_switch *ds;
 615
 616                 ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev);
 617                 if (IS_ERR(ds)) {
 618                         printk(KERN_ERR "%s[%d]: couldn't create dsa switch "
 619                                 "instance (error %ld)\n", dev->name, i,
 620                                 PTR_ERR(ds));
 621                         continue;
 622                 }
 623
 624                 dst->ds[i] = ds;
 625                 if (ds->drv->poll_link != NULL)
 626                         dst->link_poll_needed = 1;
 627         }
 628
 629         /*
 630          * If we use a tagging format that doesn't have an ethertype
 631          * field, make sure that all packets from this point on get
 632          * sent to the tag format's receive function.
 633          */
 634         wmb();
 635         dev->dsa_ptr = (void *)dst;
 636
 637         if (dst->link_poll_needed) {
 638                 INIT_WORK(&dst->link_poll_work, dsa_link_poll_work);
 639                 init_timer(&dst->link_poll_timer);
 640                 dst->link_poll_timer.data = (unsigned long)dst;
 641                 dst->link_poll_timer.function = dsa_link_poll_timer;
 642                 dst->link_poll_timer.expires = round_jiffies(jiffies + HZ);
 643                 add_timer(&dst->link_poll_timer);
 644         }
 645
 646         return 0;
 647
 648 out:
 649         dsa_of_remove(pdev);
 650
 651         return ret;
 652 }
 653
 654 static int dsa_remove(struct platform_device *pdev)
 655 {
 656         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 657         int i;
 658
 659         if (dst->link_poll_needed)
 660                 del_timer_sync(&dst->link_poll_timer);
 661
 662         flush_work(&dst->link_poll_work);
 663
 664         for (i = 0; i < dst->pd->nr_chips; i++) {
 665                 struct dsa_switch *ds = dst->ds[i];
 666
 667                 if (ds != NULL)
 668                         dsa_switch_destroy(ds);
 669         }
 670
 671         dsa_of_remove(pdev);
 672
 673         return 0;
 674 }
 675
 676 static void dsa_shutdown(struct platform_device *pdev)
 677 {
 678 }
 679
 680 static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 681                           struct packet_type *pt, struct net_device *orig_dev)
 682 {
 683         struct dsa_switch_tree *dst = dev->dsa_ptr;
 684
 685         if (unlikely(dst == NULL)) {
 686                 kfree_skb(skb);
 687                 return 0;
 688         }
 689
 690         return dst->rcv(skb, dev, pt, orig_dev);
 691 }
 692
 693 static struct packet_type dsa_pack_type __read_mostly = {
 694         .type   = cpu_to_be16(ETH_P_XDSA),
 695         .func   = dsa_switch_rcv,
 696 };
 697
 698 #ifdef CONFIG_PM_SLEEP
 699 static int dsa_suspend(struct device *d)
 700 {
 701         struct platform_device *pdev = to_platform_device(d);
 702         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 703         int i, ret = 0;
 704
 705         for (i = 0; i < dst->pd->nr_chips; i++) {
 706                 struct dsa_switch *ds = dst->ds[i];
 707
 708                 if (ds != NULL)
 709                         ret = dsa_switch_suspend(ds);
 710         }
 711
 712         return ret;
 713 }
 714
 715 static int dsa_resume(struct device *d)
 716 {
 717         struct platform_device *pdev = to_platform_device(d);
 718         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 719         int i, ret = 0;
 720
 721         for (i = 0; i < dst->pd->nr_chips; i++) {
 722                 struct dsa_switch *ds = dst->ds[i];
 723
 724                 if (ds != NULL)
 725                         ret = dsa_switch_resume(ds);
 726         }
 727
 728         return ret;
 729 }
 730 #endif
 731
 732 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 733
 734 static const struct of_device_id dsa_of_match_table[] = {
 735         { .compatible = "brcm,bcm7445-switch-v4.0" },
 736         { .compatible = "marvell,dsa", },
 737         {}
 738 };
 739 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 740
 741 static struct platform_driver dsa_driver = {
 742         .probe          = dsa_probe,
 743         .remove         = dsa_remove,
 744         .shutdown       = dsa_shutdown,
 745         .driver = {
 746                 .name   = "dsa",
 747                 .owner  = THIS_MODULE,
 748                 .of_match_table = dsa_of_match_table,
 749                 .pm     = &dsa_pm_ops,
 750         },
 751 };
 752
 753 static int __init dsa_init_module(void)
 754 {
 755         int rc;
 756
 757         rc = platform_driver_register(&dsa_driver);
 758         if (rc)
 759                 return rc;
 760
 761         dev_add_pack(&dsa_pack_type);
 762
 763         return 0;
 764 }
 765 module_init(dsa_init_module);
 766
 767 static void __exit dsa_cleanup_module(void)
 768 {
 769         dev_remove_pack(&dsa_pack_type);
 770         platform_driver_unregister(&dsa_driver);
 771 }
 772 module_exit(dsa_cleanup_module);
 773
 774 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
 775 MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
 776 MODULE_LICENSE("GPL");
 777 MODULE_ALIAS("platform:dsa");