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 static int dsa_switch_suspend(struct dsa_switch *ds)
 242 {
 243         int i, ret = 0;
 244
 245         /* Suspend slave network devices */
 246         for (i = 0; i < DSA_MAX_PORTS; i++) {
 247                 if (!(ds->phys_port_mask & (1 << i)))
 248                         continue;
 249
 250                 ret = dsa_slave_suspend(ds->ports[i]);
 251                 if (ret)
 252                         return ret;
 253         }
 254
 255         if (ds->drv->suspend)
 256                 ret = ds->drv->suspend(ds);
 257
 258         return ret;
 259 }
 260
 261 static int dsa_switch_resume(struct dsa_switch *ds)
 262 {
 263         int i, ret = 0;
 264
 265         if (ds->drv->resume)
 266                 ret = ds->drv->resume(ds);
 267
 268         if (ret)
 269                 return ret;
 270
 271         /* Resume slave network devices */
 272         for (i = 0; i < DSA_MAX_PORTS; i++) {
 273                 if (!(ds->phys_port_mask & (1 << i)))
 274                         continue;
 275
 276                 ret = dsa_slave_resume(ds->ports[i]);
 277                 if (ret)
 278                         return ret;
 279         }
 280
 281         return 0;
 282 }
 283
 284
 285 /* link polling *************************************************************/
 286 static void dsa_link_poll_work(struct work_struct *ugly)
 287 {
 288         struct dsa_switch_tree *dst;
 289         int i;
 290
 291         dst = container_of(ugly, struct dsa_switch_tree, link_poll_work);
 292
 293         for (i = 0; i < dst->pd->nr_chips; i++) {
 294                 struct dsa_switch *ds = dst->ds[i];
 295
 296                 if (ds != NULL && ds->drv->poll_link != NULL)
 297                         ds->drv->poll_link(ds);
 298         }
 299
 300         mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ));
 301 }
 302
 303 static void dsa_link_poll_timer(unsigned long _dst)
 304 {
 305         struct dsa_switch_tree *dst = (void *)_dst;
 306
 307         schedule_work(&dst->link_poll_work);
 308 }
 309
 310
 311 /* platform driver init and cleanup *****************************************/
 312 static int dev_is_class(struct device *dev, void *class)
 313 {
 314         if (dev->class != NULL && !strcmp(dev->class->name, class))
 315                 return 1;
 316
 317         return 0;
 318 }
 319
 320 static struct device *dev_find_class(struct device *parent, char *class)
 321 {
 322         if (dev_is_class(parent, class)) {
 323                 get_device(parent);
 324                 return parent;
 325         }
 326
 327         return device_find_child(parent, class, dev_is_class);
 328 }
 329
 330 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 331 {
 332         struct device *d;
 333
 334         d = dev_find_class(dev, "mdio_bus");
 335         if (d != NULL) {
 336                 struct mii_bus *bus;
 337
 338                 bus = to_mii_bus(d);
 339                 put_device(d);
 340
 341                 return bus;
 342         }
 343
 344         return NULL;
 345 }
 346 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 347
 348 static struct net_device *dev_to_net_device(struct device *dev)
 349 {
 350         struct device *d;
 351
 352         d = dev_find_class(dev, "net");
 353         if (d != NULL) {
 354                 struct net_device *nd;
 355
 356                 nd = to_net_dev(d);
 357                 dev_hold(nd);
 358                 put_device(d);
 359
 360                 return nd;
 361         }
 362
 363         return NULL;
 364 }
 365
 366 #ifdef CONFIG_OF
 367 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 368                                         struct dsa_chip_data *cd,
 369                                         int chip_index,
 370                                         struct device_node *link)
 371 {
 372         int ret;
 373         const __be32 *reg;
 374         int link_port_addr;
 375         int link_sw_addr;
 376         struct device_node *parent_sw;
 377         int len;
 378
 379         parent_sw = of_get_parent(link);
 380         if (!parent_sw)
 381                 return -EINVAL;
 382
 383         reg = of_get_property(parent_sw, "reg", &len);
 384         if (!reg || (len != sizeof(*reg) * 2))
 385                 return -EINVAL;
 386
 387         link_sw_addr = be32_to_cpup(reg + 1);
 388
 389         if (link_sw_addr >= pd->nr_chips)
 390                 return -EINVAL;
 391
 392         /* First time routing table allocation */
 393         if (!cd->rtable) {
 394                 cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL);
 395                 if (!cd->rtable)
 396                         return -ENOMEM;
 397
 398                 /* default to no valid uplink/downlink */
 399                 memset(cd->rtable, -1, pd->nr_chips * sizeof(s8));
 400         }
 401
 402         reg = of_get_property(link, "reg", NULL);
 403         if (!reg) {
 404                 ret = -EINVAL;
 405                 goto out;
 406         }
 407
 408         link_port_addr = be32_to_cpup(reg);
 409
 410         cd->rtable[link_sw_addr] = link_port_addr;
 411
 412         return 0;
 413 out:
 414         kfree(cd->rtable);
 415         return ret;
 416 }
 417
 418 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 419 {
 420         int i;
 421         int port_index;
 422
 423         for (i = 0; i < pd->nr_chips; i++) {
 424                 port_index = 0;
 425                 while (port_index < DSA_MAX_PORTS) {
 426                         kfree(pd->chip[i].port_names[port_index]);
 427                         port_index++;
 428                 }
 429                 kfree(pd->chip[i].rtable);
 430         }
 431         kfree(pd->chip);
 432 }
 433
 434 static int dsa_of_probe(struct platform_device *pdev)
 435 {
 436         struct device_node *np = pdev->dev.of_node;
 437         struct device_node *child, *mdio, *ethernet, *port, *link;
 438         struct mii_bus *mdio_bus;
 439         struct platform_device *ethernet_dev;
 440         struct dsa_platform_data *pd;
 441         struct dsa_chip_data *cd;
 442         const char *port_name;
 443         int chip_index, port_index;
 444         const unsigned int *sw_addr, *port_reg;
 445         int ret;
 446
 447         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 448         if (!mdio)
 449                 return -EINVAL;
 450
 451         mdio_bus = of_mdio_find_bus(mdio);
 452         if (!mdio_bus)
 453                 return -EINVAL;
 454
 455         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 456         if (!ethernet)
 457                 return -EINVAL;
 458
 459         ethernet_dev = of_find_device_by_node(ethernet);
 460         if (!ethernet_dev)
 461                 return -ENODEV;
 462
 463         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 464         if (!pd)
 465                 return -ENOMEM;
 466
 467         pdev->dev.platform_data = pd;
 468         pd->netdev = &ethernet_dev->dev;
 469         pd->nr_chips = of_get_child_count(np);
 470         if (pd->nr_chips > DSA_MAX_SWITCHES)
 471                 pd->nr_chips = DSA_MAX_SWITCHES;
 472
 473         pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data),
 474                         GFP_KERNEL);
 475         if (!pd->chip) {
 476                 ret = -ENOMEM;
 477                 goto out_free;
 478         }
 479
 480         chip_index = -1;
 481         for_each_available_child_of_node(np, child) {
 482                 chip_index++;
 483                 cd = &pd->chip[chip_index];
 484
 485                 cd->of_node = child;
 486                 cd->host_dev = &mdio_bus->dev;
 487
 488                 sw_addr = of_get_property(child, "reg", NULL);
 489                 if (!sw_addr)
 490                         continue;
 491
 492                 cd->sw_addr = be32_to_cpup(sw_addr);
 493                 if (cd->sw_addr > PHY_MAX_ADDR)
 494                         continue;
 495
 496                 for_each_available_child_of_node(child, port) {
 497                         port_reg = of_get_property(port, "reg", NULL);
 498                         if (!port_reg)
 499                                 continue;
 500
 501                         port_index = be32_to_cpup(port_reg);
 502
 503                         port_name = of_get_property(port, "label", NULL);
 504                         if (!port_name)
 505                                 continue;
 506
 507                         cd->port_dn[port_index] = port;
 508
 509                         cd->port_names[port_index] = kstrdup(port_name,
 510                                         GFP_KERNEL);
 511                         if (!cd->port_names[port_index]) {
 512                                 ret = -ENOMEM;
 513                                 goto out_free_chip;
 514                         }
 515
 516                         link = of_parse_phandle(port, "link", 0);
 517
 518                         if (!strcmp(port_name, "dsa") && link &&
 519                                         pd->nr_chips > 1) {
 520                                 ret = dsa_of_setup_routing_table(pd, cd,
 521                                                 chip_index, link);
 522                                 if (ret)
 523                                         goto out_free_chip;
 524                         }
 525
 526                         if (port_index == DSA_MAX_PORTS)
 527                                 break;
 528                 }
 529         }
 530
 531         return 0;
 532
 533 out_free_chip:
 534         dsa_of_free_platform_data(pd);
 535 out_free:
 536         kfree(pd);
 537         pdev->dev.platform_data = NULL;
 538         return ret;
 539 }
 540
 541 static void dsa_of_remove(struct platform_device *pdev)
 542 {
 543         struct dsa_platform_data *pd = pdev->dev.platform_data;
 544
 545         if (!pdev->dev.of_node)
 546                 return;
 547
 548         dsa_of_free_platform_data(pd);
 549         kfree(pd);
 550 }
 551 #else
 552 static inline int dsa_of_probe(struct platform_device *pdev)
 553 {
 554         return 0;
 555 }
 556
 557 static inline void dsa_of_remove(struct platform_device *pdev)
 558 {
 559 }
 560 #endif
 561
 562 static int dsa_probe(struct platform_device *pdev)
 563 {
 564         static int dsa_version_printed;
 565         struct dsa_platform_data *pd = pdev->dev.platform_data;
 566         struct net_device *dev;
 567         struct dsa_switch_tree *dst;
 568         int i, ret;
 569
 570         if (!dsa_version_printed++)
 571                 printk(KERN_NOTICE "Distributed Switch Architecture "
 572                         "driver version %s\n", dsa_driver_version);
 573
 574         if (pdev->dev.of_node) {
 575                 ret = dsa_of_probe(pdev);
 576                 if (ret)
 577                         return ret;
 578
 579                 pd = pdev->dev.platform_data;
 580         }
 581
 582         if (pd == NULL || pd->netdev == NULL)
 583                 return -EINVAL;
 584
 585         dev = dev_to_net_device(pd->netdev);
 586         if (dev == NULL) {
 587                 ret = -EINVAL;
 588                 goto out;
 589         }
 590
 591         if (dev->dsa_ptr != NULL) {
 592                 dev_put(dev);
 593                 ret = -EEXIST;
 594                 goto out;
 595         }
 596
 597         dst = kzalloc(sizeof(*dst), GFP_KERNEL);
 598         if (dst == NULL) {
 599                 dev_put(dev);
 600                 ret = -ENOMEM;
 601                 goto out;
 602         }
 603
 604         platform_set_drvdata(pdev, dst);
 605
 606         dst->pd = pd;
 607         dst->master_netdev = dev;
 608         dst->cpu_switch = -1;
 609         dst->cpu_port = -1;
 610
 611         for (i = 0; i < pd->nr_chips; i++) {
 612                 struct dsa_switch *ds;
 613
 614                 ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev);
 615                 if (IS_ERR(ds)) {
 616                         printk(KERN_ERR "%s[%d]: couldn't create dsa switch "
 617                                 "instance (error %ld)\n", dev->name, i,
 618                                 PTR_ERR(ds));
 619                         continue;
 620                 }
 621
 622                 dst->ds[i] = ds;
 623                 if (ds->drv->poll_link != NULL)
 624                         dst->link_poll_needed = 1;
 625         }
 626
 627         /*
 628          * If we use a tagging format that doesn't have an ethertype
 629          * field, make sure that all packets from this point on get
 630          * sent to the tag format's receive function.
 631          */
 632         wmb();
 633         dev->dsa_ptr = (void *)dst;
 634
 635         if (dst->link_poll_needed) {
 636                 INIT_WORK(&dst->link_poll_work, dsa_link_poll_work);
 637                 init_timer(&dst->link_poll_timer);
 638                 dst->link_poll_timer.data = (unsigned long)dst;
 639                 dst->link_poll_timer.function = dsa_link_poll_timer;
 640                 dst->link_poll_timer.expires = round_jiffies(jiffies + HZ);
 641                 add_timer(&dst->link_poll_timer);
 642         }
 643
 644         return 0;
 645
 646 out:
 647         dsa_of_remove(pdev);
 648
 649         return ret;
 650 }
 651
 652 static int dsa_remove(struct platform_device *pdev)
 653 {
 654         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 655         int i;
 656
 657         if (dst->link_poll_needed)
 658                 del_timer_sync(&dst->link_poll_timer);
 659
 660         flush_work(&dst->link_poll_work);
 661
 662         for (i = 0; i < dst->pd->nr_chips; i++) {
 663                 struct dsa_switch *ds = dst->ds[i];
 664
 665                 if (ds != NULL)
 666                         dsa_switch_destroy(ds);
 667         }
 668
 669         dsa_of_remove(pdev);
 670
 671         return 0;
 672 }
 673
 674 static void dsa_shutdown(struct platform_device *pdev)
 675 {
 676 }
 677
 678 static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 679                           struct packet_type *pt, struct net_device *orig_dev)
 680 {
 681         struct dsa_switch_tree *dst = dev->dsa_ptr;
 682
 683         if (unlikely(dst == NULL)) {
 684                 kfree_skb(skb);
 685                 return 0;
 686         }
 687
 688         return dst->rcv(skb, dev, pt, orig_dev);
 689 }
 690
 691 static struct packet_type dsa_pack_type __read_mostly = {
 692         .type   = cpu_to_be16(ETH_P_XDSA),
 693         .func   = dsa_switch_rcv,
 694 };
 695
 696 #ifdef CONFIG_PM_SLEEP
 697 static int dsa_suspend(struct device *d)
 698 {
 699         struct platform_device *pdev = to_platform_device(d);
 700         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 701         int i, ret = 0;
 702
 703         for (i = 0; i < dst->pd->nr_chips; i++) {
 704                 struct dsa_switch *ds = dst->ds[i];
 705
 706                 if (ds != NULL)
 707                         ret = dsa_switch_suspend(ds);
 708         }
 709
 710         return ret;
 711 }
 712
 713 static int dsa_resume(struct device *d)
 714 {
 715         struct platform_device *pdev = to_platform_device(d);
 716         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 717         int i, ret = 0;
 718
 719         for (i = 0; i < dst->pd->nr_chips; i++) {
 720                 struct dsa_switch *ds = dst->ds[i];
 721
 722                 if (ds != NULL)
 723                         ret = dsa_switch_resume(ds);
 724         }
 725
 726         return ret;
 727 }
 728 #endif
 729
 730 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 731
 732 static const struct of_device_id dsa_of_match_table[] = {
 733         { .compatible = "brcm,bcm7445-switch-v4.0" },
 734         { .compatible = "marvell,dsa", },
 735         {}
 736 };
 737 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 738
 739 static struct platform_driver dsa_driver = {
 740         .probe          = dsa_probe,
 741         .remove         = dsa_remove,
 742         .shutdown       = dsa_shutdown,
 743         .driver = {
 744                 .name   = "dsa",
 745                 .owner  = THIS_MODULE,
 746                 .of_match_table = dsa_of_match_table,
 747                 .pm     = &dsa_pm_ops,
 748         },
 749 };
 750
 751 static int __init dsa_init_module(void)
 752 {
 753         int rc;
 754
 755         rc = platform_driver_register(&dsa_driver);
 756         if (rc)
 757                 return rc;
 758
 759         dev_add_pack(&dsa_pack_type);
 760
 761         return 0;
 762 }
 763 module_init(dsa_init_module);
 764
 765 static void __exit dsa_cleanup_module(void)
 766 {
 767         dev_remove_pack(&dsa_pack_type);
 768         platform_driver_unregister(&dsa_driver);
 769 }
 770 module_exit(dsa_cleanup_module);
 771
 772 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
 773 MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
 774 MODULE_LICENSE("GPL");
 775 MODULE_ALIAS("platform:dsa");