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                 case DSA_TAG_PROTO_NONE:
 178                         break;
 179                 default:
 180                         ret = -ENOPROTOOPT;
 181                         goto out;
 182                 }
 183
 184                 dst->tag_protocol = drv->tag_protocol;
 185         }
 186
 187         /*
 188          * Do basic register setup.
 189          */
 190         ret = drv->setup(ds);
 191         if (ret < 0)
 192                 goto out;
 193
 194         ret = drv->set_addr(ds, dst->master_netdev->dev_addr);
 195         if (ret < 0)
 196                 goto out;
 197
 198         ds->slave_mii_bus = mdiobus_alloc();
 199         if (ds->slave_mii_bus == NULL) {
 200                 ret = -ENOMEM;
 201                 goto out;
 202         }
 203         dsa_slave_mii_bus_init(ds);
 204
 205         ret = mdiobus_register(ds->slave_mii_bus);
 206         if (ret < 0)
 207                 goto out_free;
 208
 209
 210         /*
 211          * Create network devices for physical switch ports.
 212          */
 213         for (i = 0; i < DSA_MAX_PORTS; i++) {
 214                 struct net_device *slave_dev;
 215
 216                 if (!(ds->phys_port_mask & (1 << i)))
 217                         continue;
 218
 219                 slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]);
 220                 if (slave_dev == NULL) {
 221                         printk(KERN_ERR "%s[%d]: can't create dsa "
 222                                "slave device for port %d(%s)\n",
 223                                dst->master_netdev->name,
 224                                index, i, pd->port_names[i]);
 225                         continue;
 226                 }
 227
 228                 ds->ports[i] = slave_dev;
 229         }
 230
 231         return ds;
 232
 233 out_free:
 234         mdiobus_free(ds->slave_mii_bus);
 235 out:
 236         kfree(ds);
 237         return ERR_PTR(ret);
 238 }
 239
 240 static void dsa_switch_destroy(struct dsa_switch *ds)
 241 {
 242 }
 243
 244 #ifdef CONFIG_PM_SLEEP
 245 static int dsa_switch_suspend(struct dsa_switch *ds)
 246 {
 247         int i, ret = 0;
 248
 249         /* Suspend slave network devices */
 250         for (i = 0; i < DSA_MAX_PORTS; i++) {
 251                 if (!(ds->phys_port_mask & (1 << i)))
 252                         continue;
 253
 254                 ret = dsa_slave_suspend(ds->ports[i]);
 255                 if (ret)
 256                         return ret;
 257         }
 258
 259         if (ds->drv->suspend)
 260                 ret = ds->drv->suspend(ds);
 261
 262         return ret;
 263 }
 264
 265 static int dsa_switch_resume(struct dsa_switch *ds)
 266 {
 267         int i, ret = 0;
 268
 269         if (ds->drv->resume)
 270                 ret = ds->drv->resume(ds);
 271
 272         if (ret)
 273                 return ret;
 274
 275         /* Resume slave network devices */
 276         for (i = 0; i < DSA_MAX_PORTS; i++) {
 277                 if (!(ds->phys_port_mask & (1 << i)))
 278                         continue;
 279
 280                 ret = dsa_slave_resume(ds->ports[i]);
 281                 if (ret)
 282                         return ret;
 283         }
 284
 285         return 0;
 286 }
 287 #endif
 288
 289
 290 /* link polling *************************************************************/
 291 static void dsa_link_poll_work(struct work_struct *ugly)
 292 {
 293         struct dsa_switch_tree *dst;
 294         int i;
 295
 296         dst = container_of(ugly, struct dsa_switch_tree, link_poll_work);
 297
 298         for (i = 0; i < dst->pd->nr_chips; i++) {
 299                 struct dsa_switch *ds = dst->ds[i];
 300
 301                 if (ds != NULL && ds->drv->poll_link != NULL)
 302                         ds->drv->poll_link(ds);
 303         }
 304
 305         mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ));
 306 }
 307
 308 static void dsa_link_poll_timer(unsigned long _dst)
 309 {
 310         struct dsa_switch_tree *dst = (void *)_dst;
 311
 312         schedule_work(&dst->link_poll_work);
 313 }
 314
 315
 316 /* platform driver init and cleanup *****************************************/
 317 static int dev_is_class(struct device *dev, void *class)
 318 {
 319         if (dev->class != NULL && !strcmp(dev->class->name, class))
 320                 return 1;
 321
 322         return 0;
 323 }
 324
 325 static struct device *dev_find_class(struct device *parent, char *class)
 326 {
 327         if (dev_is_class(parent, class)) {
 328                 get_device(parent);
 329                 return parent;
 330         }
 331
 332         return device_find_child(parent, class, dev_is_class);
 333 }
 334
 335 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 336 {
 337         struct device *d;
 338
 339         d = dev_find_class(dev, "mdio_bus");
 340         if (d != NULL) {
 341                 struct mii_bus *bus;
 342
 343                 bus = to_mii_bus(d);
 344                 put_device(d);
 345
 346                 return bus;
 347         }
 348
 349         return NULL;
 350 }
 351 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 352
 353 static struct net_device *dev_to_net_device(struct device *dev)
 354 {
 355         struct device *d;
 356
 357         d = dev_find_class(dev, "net");
 358         if (d != NULL) {
 359                 struct net_device *nd;
 360
 361                 nd = to_net_dev(d);
 362                 dev_hold(nd);
 363                 put_device(d);
 364
 365                 return nd;
 366         }
 367
 368         return NULL;
 369 }
 370
 371 #ifdef CONFIG_OF
 372 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 373                                         struct dsa_chip_data *cd,
 374                                         int chip_index,
 375                                         struct device_node *link)
 376 {
 377         int ret;
 378         const __be32 *reg;
 379         int link_port_addr;
 380         int link_sw_addr;
 381         struct device_node *parent_sw;
 382         int len;
 383
 384         parent_sw = of_get_parent(link);
 385         if (!parent_sw)
 386                 return -EINVAL;
 387
 388         reg = of_get_property(parent_sw, "reg", &len);
 389         if (!reg || (len != sizeof(*reg) * 2))
 390                 return -EINVAL;
 391
 392         link_sw_addr = be32_to_cpup(reg + 1);
 393
 394         if (link_sw_addr >= pd->nr_chips)
 395                 return -EINVAL;
 396
 397         /* First time routing table allocation */
 398         if (!cd->rtable) {
 399                 cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL);
 400                 if (!cd->rtable)
 401                         return -ENOMEM;
 402
 403                 /* default to no valid uplink/downlink */
 404                 memset(cd->rtable, -1, pd->nr_chips * sizeof(s8));
 405         }
 406
 407         reg = of_get_property(link, "reg", NULL);
 408         if (!reg) {
 409                 ret = -EINVAL;
 410                 goto out;
 411         }
 412
 413         link_port_addr = be32_to_cpup(reg);
 414
 415         cd->rtable[link_sw_addr] = link_port_addr;
 416
 417         return 0;
 418 out:
 419         kfree(cd->rtable);
 420         return ret;
 421 }
 422
 423 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 424 {
 425         int i;
 426         int port_index;
 427
 428         for (i = 0; i < pd->nr_chips; i++) {
 429                 port_index = 0;
 430                 while (port_index < DSA_MAX_PORTS) {
 431                         kfree(pd->chip[i].port_names[port_index]);
 432                         port_index++;
 433                 }
 434                 kfree(pd->chip[i].rtable);
 435         }
 436         kfree(pd->chip);
 437 }
 438
 439 static int dsa_of_probe(struct platform_device *pdev)
 440 {
 441         struct device_node *np = pdev->dev.of_node;
 442         struct device_node *child, *mdio, *ethernet, *port, *link;
 443         struct mii_bus *mdio_bus;
 444         struct platform_device *ethernet_dev;
 445         struct dsa_platform_data *pd;
 446         struct dsa_chip_data *cd;
 447         const char *port_name;
 448         int chip_index, port_index;
 449         const unsigned int *sw_addr, *port_reg;
 450         int ret;
 451
 452         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 453         if (!mdio)
 454                 return -EINVAL;
 455
 456         mdio_bus = of_mdio_find_bus(mdio);
 457         if (!mdio_bus)
 458                 return -EINVAL;
 459
 460         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 461         if (!ethernet)
 462                 return -EINVAL;
 463
 464         ethernet_dev = of_find_device_by_node(ethernet);
 465         if (!ethernet_dev)
 466                 return -ENODEV;
 467
 468         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 469         if (!pd)
 470                 return -ENOMEM;
 471
 472         pdev->dev.platform_data = pd;
 473         pd->netdev = &ethernet_dev->dev;
 474         pd->nr_chips = of_get_child_count(np);
 475         if (pd->nr_chips > DSA_MAX_SWITCHES)
 476                 pd->nr_chips = DSA_MAX_SWITCHES;
 477
 478         pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data),
 479                         GFP_KERNEL);
 480         if (!pd->chip) {
 481                 ret = -ENOMEM;
 482                 goto out_free;
 483         }
 484
 485         chip_index = -1;
 486         for_each_available_child_of_node(np, child) {
 487                 chip_index++;
 488                 cd = &pd->chip[chip_index];
 489
 490                 cd->of_node = child;
 491                 cd->host_dev = &mdio_bus->dev;
 492
 493                 sw_addr = of_get_property(child, "reg", NULL);
 494                 if (!sw_addr)
 495                         continue;
 496
 497                 cd->sw_addr = be32_to_cpup(sw_addr);
 498                 if (cd->sw_addr > PHY_MAX_ADDR)
 499                         continue;
 500
 501                 for_each_available_child_of_node(child, port) {
 502                         port_reg = of_get_property(port, "reg", NULL);
 503                         if (!port_reg)
 504                                 continue;
 505
 506                         port_index = be32_to_cpup(port_reg);
 507
 508                         port_name = of_get_property(port, "label", NULL);
 509                         if (!port_name)
 510                                 continue;
 511
 512                         cd->port_dn[port_index] = port;
 513
 514                         cd->port_names[port_index] = kstrdup(port_name,
 515                                         GFP_KERNEL);
 516                         if (!cd->port_names[port_index]) {
 517                                 ret = -ENOMEM;
 518                                 goto out_free_chip;
 519                         }
 520
 521                         link = of_parse_phandle(port, "link", 0);
 522
 523                         if (!strcmp(port_name, "dsa") && link &&
 524                                         pd->nr_chips > 1) {
 525                                 ret = dsa_of_setup_routing_table(pd, cd,
 526                                                 chip_index, link);
 527                                 if (ret)
 528                                         goto out_free_chip;
 529                         }
 530
 531                         if (port_index == DSA_MAX_PORTS)
 532                                 break;
 533                 }
 534         }
 535
 536         return 0;
 537
 538 out_free_chip:
 539         dsa_of_free_platform_data(pd);
 540 out_free:
 541         kfree(pd);
 542         pdev->dev.platform_data = NULL;
 543         return ret;
 544 }
 545
 546 static void dsa_of_remove(struct platform_device *pdev)
 547 {
 548         struct dsa_platform_data *pd = pdev->dev.platform_data;
 549
 550         if (!pdev->dev.of_node)
 551                 return;
 552
 553         dsa_of_free_platform_data(pd);
 554         kfree(pd);
 555 }
 556 #else
 557 static inline int dsa_of_probe(struct platform_device *pdev)
 558 {
 559         return 0;
 560 }
 561
 562 static inline void dsa_of_remove(struct platform_device *pdev)
 563 {
 564 }
 565 #endif
 566
 567 static int dsa_probe(struct platform_device *pdev)
 568 {
 569         static int dsa_version_printed;
 570         struct dsa_platform_data *pd = pdev->dev.platform_data;
 571         struct net_device *dev;
 572         struct dsa_switch_tree *dst;
 573         int i, ret;
 574
 575         if (!dsa_version_printed++)
 576                 printk(KERN_NOTICE "Distributed Switch Architecture "
 577                         "driver version %s\n", dsa_driver_version);
 578
 579         if (pdev->dev.of_node) {
 580                 ret = dsa_of_probe(pdev);
 581                 if (ret)
 582                         return ret;
 583
 584                 pd = pdev->dev.platform_data;
 585         }
 586
 587         if (pd == NULL || pd->netdev == NULL)
 588                 return -EINVAL;
 589
 590         dev = dev_to_net_device(pd->netdev);
 591         if (dev == NULL) {
 592                 ret = -EINVAL;
 593                 goto out;
 594         }
 595
 596         if (dev->dsa_ptr != NULL) {
 597                 dev_put(dev);
 598                 ret = -EEXIST;
 599                 goto out;
 600         }
 601
 602         dst = kzalloc(sizeof(*dst), GFP_KERNEL);
 603         if (dst == NULL) {
 604                 dev_put(dev);
 605                 ret = -ENOMEM;
 606                 goto out;
 607         }
 608
 609         platform_set_drvdata(pdev, dst);
 610
 611         dst->pd = pd;
 612         dst->master_netdev = dev;
 613         dst->cpu_switch = -1;
 614         dst->cpu_port = -1;
 615
 616         for (i = 0; i < pd->nr_chips; i++) {
 617                 struct dsa_switch *ds;
 618
 619                 ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev);
 620                 if (IS_ERR(ds)) {
 621                         printk(KERN_ERR "%s[%d]: couldn't create dsa switch "
 622                                 "instance (error %ld)\n", dev->name, i,
 623                                 PTR_ERR(ds));
 624                         continue;
 625                 }
 626
 627                 dst->ds[i] = ds;
 628                 if (ds->drv->poll_link != NULL)
 629                         dst->link_poll_needed = 1;
 630         }
 631
 632         /*
 633          * If we use a tagging format that doesn't have an ethertype
 634          * field, make sure that all packets from this point on get
 635          * sent to the tag format's receive function.
 636          */
 637         wmb();
 638         dev->dsa_ptr = (void *)dst;
 639
 640         if (dst->link_poll_needed) {
 641                 INIT_WORK(&dst->link_poll_work, dsa_link_poll_work);
 642                 init_timer(&dst->link_poll_timer);
 643                 dst->link_poll_timer.data = (unsigned long)dst;
 644                 dst->link_poll_timer.function = dsa_link_poll_timer;
 645                 dst->link_poll_timer.expires = round_jiffies(jiffies + HZ);
 646                 add_timer(&dst->link_poll_timer);
 647         }
 648
 649         return 0;
 650
 651 out:
 652         dsa_of_remove(pdev);
 653
 654         return ret;
 655 }
 656
 657 static int dsa_remove(struct platform_device *pdev)
 658 {
 659         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 660         int i;
 661
 662         if (dst->link_poll_needed)
 663                 del_timer_sync(&dst->link_poll_timer);
 664
 665         flush_work(&dst->link_poll_work);
 666
 667         for (i = 0; i < dst->pd->nr_chips; i++) {
 668                 struct dsa_switch *ds = dst->ds[i];
 669
 670                 if (ds != NULL)
 671                         dsa_switch_destroy(ds);
 672         }
 673
 674         dsa_of_remove(pdev);
 675
 676         return 0;
 677 }
 678
 679 static void dsa_shutdown(struct platform_device *pdev)
 680 {
 681 }
 682
 683 static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 684                           struct packet_type *pt, struct net_device *orig_dev)
 685 {
 686         struct dsa_switch_tree *dst = dev->dsa_ptr;
 687
 688         if (unlikely(dst == NULL)) {
 689                 kfree_skb(skb);
 690                 return 0;
 691         }
 692
 693         return dst->rcv(skb, dev, pt, orig_dev);
 694 }
 695
 696 static struct packet_type dsa_pack_type __read_mostly = {
 697         .type   = cpu_to_be16(ETH_P_XDSA),
 698         .func   = dsa_switch_rcv,
 699 };
 700
 701 #ifdef CONFIG_PM_SLEEP
 702 static int dsa_suspend(struct device *d)
 703 {
 704         struct platform_device *pdev = to_platform_device(d);
 705         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 706         int i, ret = 0;
 707
 708         for (i = 0; i < dst->pd->nr_chips; i++) {
 709                 struct dsa_switch *ds = dst->ds[i];
 710
 711                 if (ds != NULL)
 712                         ret = dsa_switch_suspend(ds);
 713         }
 714
 715         return ret;
 716 }
 717
 718 static int dsa_resume(struct device *d)
 719 {
 720         struct platform_device *pdev = to_platform_device(d);
 721         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 722         int i, ret = 0;
 723
 724         for (i = 0; i < dst->pd->nr_chips; i++) {
 725                 struct dsa_switch *ds = dst->ds[i];
 726
 727                 if (ds != NULL)
 728                         ret = dsa_switch_resume(ds);
 729         }
 730
 731         return ret;
 732 }
 733 #endif
 734
 735 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 736
 737 static const struct of_device_id dsa_of_match_table[] = {
 738         { .compatible = "brcm,bcm7445-switch-v4.0" },
 739         { .compatible = "marvell,dsa", },
 740         {}
 741 };
 742 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 743
 744 static struct platform_driver dsa_driver = {
 745         .probe          = dsa_probe,
 746         .remove         = dsa_remove,
 747         .shutdown       = dsa_shutdown,
 748         .driver = {
 749                 .name   = "dsa",
 750                 .owner  = THIS_MODULE,
 751                 .of_match_table = dsa_of_match_table,
 752                 .pm     = &dsa_pm_ops,
 753         },
 754 };
 755
 756 static int __init dsa_init_module(void)
 757 {
 758         int rc;
 759
 760         rc = platform_driver_register(&dsa_driver);
 761         if (rc)
 762                 return rc;
 763
 764         dev_add_pack(&dsa_pack_type);
 765
 766         return 0;
 767 }
 768 module_init(dsa_init_module);
 769
 770 static void __exit dsa_cleanup_module(void)
 771 {
 772         dev_remove_pack(&dsa_pack_type);
 773         platform_driver_unregister(&dsa_driver);
 774 }
 775 module_exit(dsa_cleanup_module);
 776
 777 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
 778 MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
 779 MODULE_LICENSE("GPL");
 780 MODULE_ALIAS("platform:dsa");