drivers/net/dsa/hirschmann/hellcreek.c

   1 // SPDX-License-Identifier: (GPL-2.0 or MIT)
   2 /*
   3  * DSA driver for:
   4  * Hirschmann Hellcreek TSN switch.
   5  *
   6  * Copyright (C) 2019-2021 Linutronix GmbH
   7  * Author Kurt Kanzenbach <kurt@linutronix.de>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/of.h>
  14 #include <linux/of_device.h>
  15 #include <linux/of_mdio.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/bitops.h>
  18 #include <linux/if_bridge.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/random.h>
  22 #include <linux/iopoll.h>
  23 #include <linux/mutex.h>
  24 #include <linux/delay.h>
  25 #include <net/dsa.h>
  26
  27 #include "hellcreek.h"
  28 #include "hellcreek_ptp.h"
  29 #include "hellcreek_hwtstamp.h"
  30
  31 static const struct hellcreek_counter hellcreek_counter[] = {
  32         { 0x00, "RxFiltered", },
  33         { 0x01, "RxOctets1k", },
  34         { 0x02, "RxVTAG", },
  35         { 0x03, "RxL2BAD", },
  36         { 0x04, "RxOverloadDrop", },
  37         { 0x05, "RxUC", },
  38         { 0x06, "RxMC", },
  39         { 0x07, "RxBC", },
  40         { 0x08, "RxRS<64", },
  41         { 0x09, "RxRS64", },
  42         { 0x0a, "RxRS65_127", },
  43         { 0x0b, "RxRS128_255", },
  44         { 0x0c, "RxRS256_511", },
  45         { 0x0d, "RxRS512_1023", },
  46         { 0x0e, "RxRS1024_1518", },
  47         { 0x0f, "RxRS>1518", },
  48         { 0x10, "TxTailDropQueue0", },
  49         { 0x11, "TxTailDropQueue1", },
  50         { 0x12, "TxTailDropQueue2", },
  51         { 0x13, "TxTailDropQueue3", },
  52         { 0x14, "TxTailDropQueue4", },
  53         { 0x15, "TxTailDropQueue5", },
  54         { 0x16, "TxTailDropQueue6", },
  55         { 0x17, "TxTailDropQueue7", },
  56         { 0x18, "RxTrafficClass0", },
  57         { 0x19, "RxTrafficClass1", },
  58         { 0x1a, "RxTrafficClass2", },
  59         { 0x1b, "RxTrafficClass3", },
  60         { 0x1c, "RxTrafficClass4", },
  61         { 0x1d, "RxTrafficClass5", },
  62         { 0x1e, "RxTrafficClass6", },
  63         { 0x1f, "RxTrafficClass7", },
  64         { 0x21, "TxOctets1k", },
  65         { 0x22, "TxVTAG", },
  66         { 0x23, "TxL2BAD", },
  67         { 0x25, "TxUC", },
  68         { 0x26, "TxMC", },
  69         { 0x27, "TxBC", },
  70         { 0x28, "TxTS<64", },
  71         { 0x29, "TxTS64", },
  72         { 0x2a, "TxTS65_127", },
  73         { 0x2b, "TxTS128_255", },
  74         { 0x2c, "TxTS256_511", },
  75         { 0x2d, "TxTS512_1023", },
  76         { 0x2e, "TxTS1024_1518", },
  77         { 0x2f, "TxTS>1518", },
  78         { 0x30, "TxTrafficClassOverrun0", },
  79         { 0x31, "TxTrafficClassOverrun1", },
  80         { 0x32, "TxTrafficClassOverrun2", },
  81         { 0x33, "TxTrafficClassOverrun3", },
  82         { 0x34, "TxTrafficClassOverrun4", },
  83         { 0x35, "TxTrafficClassOverrun5", },
  84         { 0x36, "TxTrafficClassOverrun6", },
  85         { 0x37, "TxTrafficClassOverrun7", },
  86         { 0x38, "TxTrafficClass0", },
  87         { 0x39, "TxTrafficClass1", },
  88         { 0x3a, "TxTrafficClass2", },
  89         { 0x3b, "TxTrafficClass3", },
  90         { 0x3c, "TxTrafficClass4", },
  91         { 0x3d, "TxTrafficClass5", },
  92         { 0x3e, "TxTrafficClass6", },
  93         { 0x3f, "TxTrafficClass7", },
  94 };
  95
  96 static u16 hellcreek_read(struct hellcreek *hellcreek, unsigned int offset)
  97 {
  98         return readw(hellcreek->base + offset);
  99 }
 100
 101 static u16 hellcreek_read_ctrl(struct hellcreek *hellcreek)
 102 {
 103         return readw(hellcreek->base + HR_CTRL_C);
 104 }
 105
 106 static u16 hellcreek_read_stat(struct hellcreek *hellcreek)
 107 {
 108         return readw(hellcreek->base + HR_SWSTAT);
 109 }
 110
 111 static void hellcreek_write(struct hellcreek *hellcreek, u16 data,
 112                             unsigned int offset)
 113 {
 114         writew(data, hellcreek->base + offset);
 115 }
 116
 117 static void hellcreek_select_port(struct hellcreek *hellcreek, int port)
 118 {
 119         u16 val = port << HR_PSEL_PTWSEL_SHIFT;
 120
 121         hellcreek_write(hellcreek, val, HR_PSEL);
 122 }
 123
 124 static void hellcreek_select_prio(struct hellcreek *hellcreek, int prio)
 125 {
 126         u16 val = prio << HR_PSEL_PRTCWSEL_SHIFT;
 127
 128         hellcreek_write(hellcreek, val, HR_PSEL);
 129 }
 130
 131 static void hellcreek_select_counter(struct hellcreek *hellcreek, int counter)
 132 {
 133         u16 val = counter << HR_CSEL_SHIFT;
 134
 135         hellcreek_write(hellcreek, val, HR_CSEL);
 136
 137         /* Data sheet states to wait at least 20 internal clock cycles */
 138         ndelay(200);
 139 }
 140
 141 static void hellcreek_select_vlan(struct hellcreek *hellcreek, int vid,
 142                                   bool pvid)
 143 {
 144         u16 val = 0;
 145
 146         /* Set pvid bit first */
 147         if (pvid)
 148                 val |= HR_VIDCFG_PVID;
 149         hellcreek_write(hellcreek, val, HR_VIDCFG);
 150
 151         /* Set vlan */
 152         val |= vid << HR_VIDCFG_VID_SHIFT;
 153         hellcreek_write(hellcreek, val, HR_VIDCFG);
 154 }
 155
 156 static void hellcreek_select_tgd(struct hellcreek *hellcreek, int port)
 157 {
 158         u16 val = port << TR_TGDSEL_TDGSEL_SHIFT;
 159
 160         hellcreek_write(hellcreek, val, TR_TGDSEL);
 161 }
 162
 163 static int hellcreek_wait_until_ready(struct hellcreek *hellcreek)
 164 {
 165         u16 val;
 166
 167         /* Wait up to 1ms, although 3 us should be enough */
 168         return readx_poll_timeout(hellcreek_read_ctrl, hellcreek,
 169                                   val, val & HR_CTRL_C_READY,
 170                                   3, 1000);
 171 }
 172
 173 static int hellcreek_wait_until_transitioned(struct hellcreek *hellcreek)
 174 {
 175         u16 val;
 176
 177         return readx_poll_timeout_atomic(hellcreek_read_ctrl, hellcreek,
 178                                          val, !(val & HR_CTRL_C_TRANSITION),
 179                                          1, 1000);
 180 }
 181
 182 static int hellcreek_wait_fdb_ready(struct hellcreek *hellcreek)
 183 {
 184         u16 val;
 185
 186         return readx_poll_timeout_atomic(hellcreek_read_stat, hellcreek,
 187                                          val, !(val & HR_SWSTAT_BUSY),
 188                                          1, 1000);
 189 }
 190
 191 static int hellcreek_detect(struct hellcreek *hellcreek)
 192 {
 193         u16 id, rel_low, rel_high, date_low, date_high, tgd_ver;
 194         u8 tgd_maj, tgd_min;
 195         u32 rel, date;
 196
 197         id        = hellcreek_read(hellcreek, HR_MODID_C);
 198         rel_low   = hellcreek_read(hellcreek, HR_REL_L_C);
 199         rel_high  = hellcreek_read(hellcreek, HR_REL_H_C);
 200         date_low  = hellcreek_read(hellcreek, HR_BLD_L_C);
 201         date_high = hellcreek_read(hellcreek, HR_BLD_H_C);
 202         tgd_ver   = hellcreek_read(hellcreek, TR_TGDVER);
 203
 204         if (id != hellcreek->pdata->module_id)
 205                 return -ENODEV;
 206
 207         rel     = rel_low | (rel_high << 16);
 208         date    = date_low | (date_high << 16);
 209         tgd_maj = (tgd_ver & TR_TGDVER_REV_MAJ_MASK) >> TR_TGDVER_REV_MAJ_SHIFT;
 210         tgd_min = (tgd_ver & TR_TGDVER_REV_MIN_MASK) >> TR_TGDVER_REV_MIN_SHIFT;
 211
 212         dev_info(hellcreek->dev, "Module ID=%02x Release=%04x Date=%04x TGD Version=%02x.%02x\n",
 213                  id, rel, date, tgd_maj, tgd_min);
 214
 215         return 0;
 216 }
 217
 218 static void hellcreek_feature_detect(struct hellcreek *hellcreek)
 219 {
 220         u16 features;
 221
 222         features = hellcreek_read(hellcreek, HR_FEABITS0);
 223
 224         /* Only detect the size of the FDB table. The size and current
 225          * utilization can be queried via devlink.
 226          */
 227         hellcreek->fdb_entries = ((features & HR_FEABITS0_FDBBINS_MASK) >>
 228                                HR_FEABITS0_FDBBINS_SHIFT) * 32;
 229 }
 230
 231 static enum dsa_tag_protocol hellcreek_get_tag_protocol(struct dsa_switch *ds,
 232                                                         int port,
 233                                                         enum dsa_tag_protocol mp)
 234 {
 235         return DSA_TAG_PROTO_HELLCREEK;
 236 }
 237
 238 static int hellcreek_port_enable(struct dsa_switch *ds, int port,
 239                                  struct phy_device *phy)
 240 {
 241         struct hellcreek *hellcreek = ds->priv;
 242         struct hellcreek_port *hellcreek_port;
 243         u16 val;
 244
 245         hellcreek_port = &hellcreek->ports[port];
 246
 247         dev_dbg(hellcreek->dev, "Enable port %d\n", port);
 248
 249         mutex_lock(&hellcreek->reg_lock);
 250
 251         hellcreek_select_port(hellcreek, port);
 252         val = hellcreek_port->ptcfg;
 253         val |= HR_PTCFG_ADMIN_EN;
 254         hellcreek_write(hellcreek, val, HR_PTCFG);
 255         hellcreek_port->ptcfg = val;
 256
 257         mutex_unlock(&hellcreek->reg_lock);
 258
 259         return 0;
 260 }
 261
 262 static void hellcreek_port_disable(struct dsa_switch *ds, int port)
 263 {
 264         struct hellcreek *hellcreek = ds->priv;
 265         struct hellcreek_port *hellcreek_port;
 266         u16 val;
 267
 268         hellcreek_port = &hellcreek->ports[port];
 269
 270         dev_dbg(hellcreek->dev, "Disable port %d\n", port);
 271
 272         mutex_lock(&hellcreek->reg_lock);
 273
 274         hellcreek_select_port(hellcreek, port);
 275         val = hellcreek_port->ptcfg;
 276         val &= ~HR_PTCFG_ADMIN_EN;
 277         hellcreek_write(hellcreek, val, HR_PTCFG);
 278         hellcreek_port->ptcfg = val;
 279
 280         mutex_unlock(&hellcreek->reg_lock);
 281 }
 282
 283 static void hellcreek_get_strings(struct dsa_switch *ds, int port,
 284                                   u32 stringset, uint8_t *data)
 285 {
 286         int i;
 287
 288         for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) {
 289                 const struct hellcreek_counter *counter = &hellcreek_counter[i];
 290
 291                 strlcpy(data + i * ETH_GSTRING_LEN,
 292                         counter->name, ETH_GSTRING_LEN);
 293         }
 294 }
 295
 296 static int hellcreek_get_sset_count(struct dsa_switch *ds, int port, int sset)
 297 {
 298         if (sset != ETH_SS_STATS)
 299                 return 0;
 300
 301         return ARRAY_SIZE(hellcreek_counter);
 302 }
 303
 304 static void hellcreek_get_ethtool_stats(struct dsa_switch *ds, int port,
 305                                         uint64_t *data)
 306 {
 307         struct hellcreek *hellcreek = ds->priv;
 308         struct hellcreek_port *hellcreek_port;
 309         int i;
 310
 311         hellcreek_port = &hellcreek->ports[port];
 312
 313         for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) {
 314                 const struct hellcreek_counter *counter = &hellcreek_counter[i];
 315                 u8 offset = counter->offset + port * 64;
 316                 u16 high, low;
 317                 u64 value;
 318
 319                 mutex_lock(&hellcreek->reg_lock);
 320
 321                 hellcreek_select_counter(hellcreek, offset);
 322
 323                 /* The registers are locked internally by selecting the
 324                  * counter. So low and high can be read without reading high
 325                  * again.
 326                  */
 327                 high  = hellcreek_read(hellcreek, HR_CRDH);
 328                 low   = hellcreek_read(hellcreek, HR_CRDL);
 329                 value = ((u64)high << 16) | low;
 330
 331                 hellcreek_port->counter_values[i] += value;
 332                 data[i] = hellcreek_port->counter_values[i];
 333
 334                 mutex_unlock(&hellcreek->reg_lock);
 335         }
 336 }
 337
 338 static u16 hellcreek_private_vid(int port)
 339 {
 340         return VLAN_N_VID - port + 1;
 341 }
 342
 343 static int hellcreek_vlan_prepare(struct dsa_switch *ds, int port,
 344                                   const struct switchdev_obj_port_vlan *vlan,
 345                                   struct netlink_ext_ack *extack)
 346 {
 347         struct hellcreek *hellcreek = ds->priv;
 348         int i;
 349
 350         dev_dbg(hellcreek->dev, "VLAN prepare for port %d\n", port);
 351
 352         /* Restriction: Make sure that nobody uses the "private" VLANs. These
 353          * VLANs are internally used by the driver to ensure port
 354          * separation. Thus, they cannot be used by someone else.
 355          */
 356         for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
 357                 const u16 restricted_vid = hellcreek_private_vid(i);
 358
 359                 if (!dsa_is_user_port(ds, i))
 360                         continue;
 361
 362                 if (vlan->vid == restricted_vid) {
 363                         NL_SET_ERR_MSG_MOD(extack, "VID restricted by driver");
 364                         return -EBUSY;
 365                 }
 366         }
 367
 368         return 0;
 369 }
 370
 371 static void hellcreek_select_vlan_params(struct hellcreek *hellcreek, int port,
 372                                          int *shift, int *mask)
 373 {
 374         switch (port) {
 375         case 0:
 376                 *shift = HR_VIDMBRCFG_P0MBR_SHIFT;
 377                 *mask  = HR_VIDMBRCFG_P0MBR_MASK;
 378                 break;
 379         case 1:
 380                 *shift = HR_VIDMBRCFG_P1MBR_SHIFT;
 381                 *mask  = HR_VIDMBRCFG_P1MBR_MASK;
 382                 break;
 383         case 2:
 384                 *shift = HR_VIDMBRCFG_P2MBR_SHIFT;
 385                 *mask  = HR_VIDMBRCFG_P2MBR_MASK;
 386                 break;
 387         case 3:
 388                 *shift = HR_VIDMBRCFG_P3MBR_SHIFT;
 389                 *mask  = HR_VIDMBRCFG_P3MBR_MASK;
 390                 break;
 391         default:
 392                 *shift = *mask = 0;
 393                 dev_err(hellcreek->dev, "Unknown port %d selected!\n", port);
 394         }
 395 }
 396
 397 static void hellcreek_apply_vlan(struct hellcreek *hellcreek, int port, u16 vid,
 398                                  bool pvid, bool untagged)
 399 {
 400         int shift, mask;
 401         u16 val;
 402
 403         dev_dbg(hellcreek->dev, "Apply VLAN: port=%d vid=%u pvid=%d untagged=%d",
 404                 port, vid, pvid, untagged);
 405
 406         mutex_lock(&hellcreek->reg_lock);
 407
 408         hellcreek_select_port(hellcreek, port);
 409         hellcreek_select_vlan(hellcreek, vid, pvid);
 410
 411         /* Setup port vlan membership */
 412         hellcreek_select_vlan_params(hellcreek, port, &shift, &mask);
 413         val = hellcreek->vidmbrcfg[vid];
 414         val &= ~mask;
 415         if (untagged)
 416                 val |= HELLCREEK_VLAN_UNTAGGED_MEMBER << shift;
 417         else
 418                 val |= HELLCREEK_VLAN_TAGGED_MEMBER << shift;
 419
 420         hellcreek_write(hellcreek, val, HR_VIDMBRCFG);
 421         hellcreek->vidmbrcfg[vid] = val;
 422
 423         mutex_unlock(&hellcreek->reg_lock);
 424 }
 425
 426 static void hellcreek_unapply_vlan(struct hellcreek *hellcreek, int port,
 427                                    u16 vid)
 428 {
 429         int shift, mask;
 430         u16 val;
 431
 432         dev_dbg(hellcreek->dev, "Unapply VLAN: port=%d vid=%u\n", port, vid);
 433
 434         mutex_lock(&hellcreek->reg_lock);
 435
 436         hellcreek_select_vlan(hellcreek, vid, false);
 437
 438         /* Setup port vlan membership */
 439         hellcreek_select_vlan_params(hellcreek, port, &shift, &mask);
 440         val = hellcreek->vidmbrcfg[vid];
 441         val &= ~mask;
 442         val |= HELLCREEK_VLAN_NO_MEMBER << shift;
 443
 444         hellcreek_write(hellcreek, val, HR_VIDMBRCFG);
 445         hellcreek->vidmbrcfg[vid] = val;
 446
 447         mutex_unlock(&hellcreek->reg_lock);
 448 }
 449
 450 static int hellcreek_vlan_add(struct dsa_switch *ds, int port,
 451                               const struct switchdev_obj_port_vlan *vlan,
 452                               struct netlink_ext_ack *extack)
 453 {
 454         bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
 455         bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
 456         struct hellcreek *hellcreek = ds->priv;
 457         int err;
 458
 459         err = hellcreek_vlan_prepare(ds, port, vlan, extack);
 460         if (err)
 461                 return err;
 462
 463         dev_dbg(hellcreek->dev, "Add VLAN %d on port %d, %s, %s\n",
 464                 vlan->vid, port, untagged ? "untagged" : "tagged",
 465                 pvid ? "PVID" : "no PVID");
 466
 467         hellcreek_apply_vlan(hellcreek, port, vlan->vid, pvid, untagged);
 468
 469         return 0;
 470 }
 471
 472 static int hellcreek_vlan_del(struct dsa_switch *ds, int port,
 473                               const struct switchdev_obj_port_vlan *vlan)
 474 {
 475         struct hellcreek *hellcreek = ds->priv;
 476
 477         dev_dbg(hellcreek->dev, "Remove VLAN %d on port %d\n", vlan->vid, port);
 478
 479         hellcreek_unapply_vlan(hellcreek, port, vlan->vid);
 480
 481         return 0;
 482 }
 483
 484 static void hellcreek_port_stp_state_set(struct dsa_switch *ds, int port,
 485                                          u8 state)
 486 {
 487         struct hellcreek *hellcreek = ds->priv;
 488         struct hellcreek_port *hellcreek_port;
 489         const char *new_state;
 490         u16 val;
 491
 492         mutex_lock(&hellcreek->reg_lock);
 493
 494         hellcreek_port = &hellcreek->ports[port];
 495         val = hellcreek_port->ptcfg;
 496
 497         switch (state) {
 498         case BR_STATE_DISABLED:
 499                 new_state = "DISABLED";
 500                 val |= HR_PTCFG_BLOCKED;
 501                 val &= ~HR_PTCFG_LEARNING_EN;
 502                 break;
 503         case BR_STATE_BLOCKING:
 504                 new_state = "BLOCKING";
 505                 val |= HR_PTCFG_BLOCKED;
 506                 val &= ~HR_PTCFG_LEARNING_EN;
 507                 break;
 508         case BR_STATE_LISTENING:
 509                 new_state = "LISTENING";
 510                 val |= HR_PTCFG_BLOCKED;
 511                 val &= ~HR_PTCFG_LEARNING_EN;
 512                 break;
 513         case BR_STATE_LEARNING:
 514                 new_state = "LEARNING";
 515                 val |= HR_PTCFG_BLOCKED;
 516                 val |= HR_PTCFG_LEARNING_EN;
 517                 break;
 518         case BR_STATE_FORWARDING:
 519                 new_state = "FORWARDING";
 520                 val &= ~HR_PTCFG_BLOCKED;
 521                 val |= HR_PTCFG_LEARNING_EN;
 522                 break;
 523         default:
 524                 new_state = "UNKNOWN";
 525         }
 526
 527         hellcreek_select_port(hellcreek, port);
 528         hellcreek_write(hellcreek, val, HR_PTCFG);
 529         hellcreek_port->ptcfg = val;
 530
 531         mutex_unlock(&hellcreek->reg_lock);
 532
 533         dev_dbg(hellcreek->dev, "Configured STP state for port %d: %s\n",
 534                 port, new_state);
 535 }
 536
 537 static void hellcreek_setup_ingressflt(struct hellcreek *hellcreek, int port,
 538                                        bool enable)
 539 {
 540         struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
 541         u16 ptcfg;
 542
 543         mutex_lock(&hellcreek->reg_lock);
 544
 545         ptcfg = hellcreek_port->ptcfg;
 546
 547         if (enable)
 548                 ptcfg |= HR_PTCFG_INGRESSFLT;
 549         else
 550                 ptcfg &= ~HR_PTCFG_INGRESSFLT;
 551
 552         hellcreek_select_port(hellcreek, port);
 553         hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
 554         hellcreek_port->ptcfg = ptcfg;
 555
 556         mutex_unlock(&hellcreek->reg_lock);
 557 }
 558
 559 static void hellcreek_setup_vlan_awareness(struct hellcreek *hellcreek,
 560                                            bool enable)
 561 {
 562         u16 swcfg;
 563
 564         mutex_lock(&hellcreek->reg_lock);
 565
 566         swcfg = hellcreek->swcfg;
 567
 568         if (enable)
 569                 swcfg |= HR_SWCFG_VLAN_UNAWARE;
 570         else
 571                 swcfg &= ~HR_SWCFG_VLAN_UNAWARE;
 572
 573         hellcreek_write(hellcreek, swcfg, HR_SWCFG);
 574
 575         mutex_unlock(&hellcreek->reg_lock);
 576 }
 577
 578 /* Default setup for DSA: VLAN <X>: CPU and Port <X> egress untagged. */
 579 static void hellcreek_setup_vlan_membership(struct dsa_switch *ds, int port,
 580                                             bool enabled)
 581 {
 582         const u16 vid = hellcreek_private_vid(port);
 583         int upstream = dsa_upstream_port(ds, port);
 584         struct hellcreek *hellcreek = ds->priv;
 585
 586         /* Apply vid to port as egress untagged and port vlan id */
 587         if (enabled)
 588                 hellcreek_apply_vlan(hellcreek, port, vid, true, true);
 589         else
 590                 hellcreek_unapply_vlan(hellcreek, port, vid);
 591
 592         /* Apply vid to cpu port as well */
 593         if (enabled)
 594                 hellcreek_apply_vlan(hellcreek, upstream, vid, false, true);
 595         else
 596                 hellcreek_unapply_vlan(hellcreek, upstream, vid);
 597 }
 598
 599 static void hellcreek_port_set_ucast_flood(struct hellcreek *hellcreek,
 600                                            int port, bool enable)
 601 {
 602         struct hellcreek_port *hellcreek_port;
 603         u16 val;
 604
 605         hellcreek_port = &hellcreek->ports[port];
 606
 607         dev_dbg(hellcreek->dev, "%s unicast flooding on port %d\n",
 608                 enable ? "Enable" : "Disable", port);
 609
 610         mutex_lock(&hellcreek->reg_lock);
 611
 612         hellcreek_select_port(hellcreek, port);
 613         val = hellcreek_port->ptcfg;
 614         if (enable)
 615                 val &= ~HR_PTCFG_UUC_FLT;
 616         else
 617                 val |= HR_PTCFG_UUC_FLT;
 618         hellcreek_write(hellcreek, val, HR_PTCFG);
 619         hellcreek_port->ptcfg = val;
 620
 621         mutex_unlock(&hellcreek->reg_lock);
 622 }
 623
 624 static void hellcreek_port_set_mcast_flood(struct hellcreek *hellcreek,
 625                                            int port, bool enable)
 626 {
 627         struct hellcreek_port *hellcreek_port;
 628         u16 val;
 629
 630         hellcreek_port = &hellcreek->ports[port];
 631
 632         dev_dbg(hellcreek->dev, "%s multicast flooding on port %d\n",
 633                 enable ? "Enable" : "Disable", port);
 634
 635         mutex_lock(&hellcreek->reg_lock);
 636
 637         hellcreek_select_port(hellcreek, port);
 638         val = hellcreek_port->ptcfg;
 639         if (enable)
 640                 val &= ~HR_PTCFG_UMC_FLT;
 641         else
 642                 val |= HR_PTCFG_UMC_FLT;
 643         hellcreek_write(hellcreek, val, HR_PTCFG);
 644         hellcreek_port->ptcfg = val;
 645
 646         mutex_unlock(&hellcreek->reg_lock);
 647 }
 648
 649 static int hellcreek_pre_bridge_flags(struct dsa_switch *ds, int port,
 650                                       struct switchdev_brport_flags flags,
 651                                       struct netlink_ext_ack *extack)
 652 {
 653         if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD))
 654                 return -EINVAL;
 655
 656         return 0;
 657 }
 658
 659 static int hellcreek_bridge_flags(struct dsa_switch *ds, int port,
 660                                   struct switchdev_brport_flags flags,
 661                                   struct netlink_ext_ack *extack)
 662 {
 663         struct hellcreek *hellcreek = ds->priv;
 664
 665         if (flags.mask & BR_FLOOD)
 666                 hellcreek_port_set_ucast_flood(hellcreek, port,
 667                                                !!(flags.val & BR_FLOOD));
 668
 669         if (flags.mask & BR_MCAST_FLOOD)
 670                 hellcreek_port_set_mcast_flood(hellcreek, port,
 671                                                !!(flags.val & BR_MCAST_FLOOD));
 672
 673         return 0;
 674 }
 675
 676 static int hellcreek_port_bridge_join(struct dsa_switch *ds, int port,
 677                                       struct net_device *br)
 678 {
 679         struct hellcreek *hellcreek = ds->priv;
 680
 681         dev_dbg(hellcreek->dev, "Port %d joins a bridge\n", port);
 682
 683         /* When joining a vlan_filtering bridge, keep the switch VLAN aware */
 684         if (!ds->vlan_filtering)
 685                 hellcreek_setup_vlan_awareness(hellcreek, false);
 686
 687         /* Drop private vlans */
 688         hellcreek_setup_vlan_membership(ds, port, false);
 689
 690         return 0;
 691 }
 692
 693 static void hellcreek_port_bridge_leave(struct dsa_switch *ds, int port,
 694                                         struct net_device *br)
 695 {
 696         struct hellcreek *hellcreek = ds->priv;
 697
 698         dev_dbg(hellcreek->dev, "Port %d leaves a bridge\n", port);
 699
 700         /* Enable VLAN awareness */
 701         hellcreek_setup_vlan_awareness(hellcreek, true);
 702
 703         /* Enable private vlans */
 704         hellcreek_setup_vlan_membership(ds, port, true);
 705 }
 706
 707 static int __hellcreek_fdb_add(struct hellcreek *hellcreek,
 708                                const struct hellcreek_fdb_entry *entry)
 709 {
 710         u16 meta = 0;
 711
 712         dev_dbg(hellcreek->dev, "Add static FDB entry: MAC=%pM, MASK=0x%02x, "
 713                 "OBT=%d, REPRIO_EN=%d, PRIO=%d\n", entry->mac, entry->portmask,
 714                 entry->is_obt, entry->reprio_en, entry->reprio_tc);
 715
 716         /* Add mac address */
 717         hellcreek_write(hellcreek, entry->mac[1] | (entry->mac[0] << 8), HR_FDBWDH);
 718         hellcreek_write(hellcreek, entry->mac[3] | (entry->mac[2] << 8), HR_FDBWDM);
 719         hellcreek_write(hellcreek, entry->mac[5] | (entry->mac[4] << 8), HR_FDBWDL);
 720
 721         /* Meta data */
 722         meta |= entry->portmask << HR_FDBWRM0_PORTMASK_SHIFT;
 723         if (entry->is_obt)
 724                 meta |= HR_FDBWRM0_OBT;
 725         if (entry->reprio_en) {
 726                 meta |= HR_FDBWRM0_REPRIO_EN;
 727                 meta |= entry->reprio_tc << HR_FDBWRM0_REPRIO_TC_SHIFT;
 728         }
 729         hellcreek_write(hellcreek, meta, HR_FDBWRM0);
 730
 731         /* Commit */
 732         hellcreek_write(hellcreek, 0x00, HR_FDBWRCMD);
 733
 734         /* Wait until done */
 735         return hellcreek_wait_fdb_ready(hellcreek);
 736 }
 737
 738 static int __hellcreek_fdb_del(struct hellcreek *hellcreek,
 739                                const struct hellcreek_fdb_entry *entry)
 740 {
 741         dev_dbg(hellcreek->dev, "Delete FDB entry: MAC=%pM!\n", entry->mac);
 742
 743         /* Delete by matching idx */
 744         hellcreek_write(hellcreek, entry->idx | HR_FDBWRCMD_FDBDEL, HR_FDBWRCMD);
 745
 746         /* Wait until done */
 747         return hellcreek_wait_fdb_ready(hellcreek);
 748 }
 749
 750 static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek,
 751                                          struct hellcreek_fdb_entry *entry,
 752                                          size_t idx)
 753 {
 754         unsigned char addr[ETH_ALEN];
 755         u16 meta, mac;
 756
 757         /* Read values */
 758         meta    = hellcreek_read(hellcreek, HR_FDBMDRD);
 759         mac     = hellcreek_read(hellcreek, HR_FDBRDL);
 760         addr[5] = mac & 0xff;
 761         addr[4] = (mac & 0xff00) >> 8;
 762         mac     = hellcreek_read(hellcreek, HR_FDBRDM);
 763         addr[3] = mac & 0xff;
 764         addr[2] = (mac & 0xff00) >> 8;
 765         mac     = hellcreek_read(hellcreek, HR_FDBRDH);
 766         addr[1] = mac & 0xff;
 767         addr[0] = (mac & 0xff00) >> 8;
 768
 769         /* Populate @entry */
 770         memcpy(entry->mac, addr, sizeof(addr));
 771         entry->idx          = idx;
 772         entry->portmask     = (meta & HR_FDBMDRD_PORTMASK_MASK) >>
 773                 HR_FDBMDRD_PORTMASK_SHIFT;
 774         entry->age          = (meta & HR_FDBMDRD_AGE_MASK) >>
 775                 HR_FDBMDRD_AGE_SHIFT;
 776         entry->is_obt       = !!(meta & HR_FDBMDRD_OBT);
 777         entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED);
 778         entry->is_static    = !!(meta & HR_FDBMDRD_STATIC);
 779         entry->reprio_tc    = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >>
 780                 HR_FDBMDRD_REPRIO_TC_SHIFT;
 781         entry->reprio_en    = !!(meta & HR_FDBMDRD_REPRIO_EN);
 782 }
 783
 784 /* Retrieve the index of a FDB entry by mac address. Currently we search through
 785  * the complete table in hardware. If that's too slow, we might have to cache
 786  * the complete FDB table in software.
 787  */
 788 static int hellcreek_fdb_get(struct hellcreek *hellcreek,
 789                              const unsigned char *dest,
 790                              struct hellcreek_fdb_entry *entry)
 791 {
 792         size_t i;
 793
 794         /* Set read pointer to zero: The read of HR_FDBMAX (read-only register)
 795          * should reset the internal pointer. But, that doesn't work. The vendor
 796          * suggested a subsequent write as workaround. Same for HR_FDBRDH below.
 797          */
 798         hellcreek_read(hellcreek, HR_FDBMAX);
 799         hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
 800
 801         /* We have to read the complete table, because the switch/driver might
 802          * enter new entries anywhere.
 803          */
 804         for (i = 0; i < hellcreek->fdb_entries; ++i) {
 805                 struct hellcreek_fdb_entry tmp = { 0 };
 806
 807                 /* Read entry */
 808                 hellcreek_populate_fdb_entry(hellcreek, &tmp, i);
 809
 810                 /* Force next entry */
 811                 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
 812
 813                 if (memcmp(tmp.mac, dest, ETH_ALEN))
 814                         continue;
 815
 816                 /* Match found */
 817                 memcpy(entry, &tmp, sizeof(*entry));
 818
 819                 return 0;
 820         }
 821
 822         return -ENOENT;
 823 }
 824
 825 static int hellcreek_fdb_add(struct dsa_switch *ds, int port,
 826                              const unsigned char *addr, u16 vid)
 827 {
 828         struct hellcreek_fdb_entry entry = { 0 };
 829         struct hellcreek *hellcreek = ds->priv;
 830         int ret;
 831
 832         dev_dbg(hellcreek->dev, "Add FDB entry for MAC=%pM\n", addr);
 833
 834         mutex_lock(&hellcreek->reg_lock);
 835
 836         ret = hellcreek_fdb_get(hellcreek, addr, &entry);
 837         if (ret) {
 838                 /* Not found */
 839                 memcpy(entry.mac, addr, sizeof(entry.mac));
 840                 entry.portmask = BIT(port);
 841
 842                 ret = __hellcreek_fdb_add(hellcreek, &entry);
 843                 if (ret) {
 844                         dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
 845                         goto out;
 846                 }
 847         } else {
 848                 /* Found */
 849                 ret = __hellcreek_fdb_del(hellcreek, &entry);
 850                 if (ret) {
 851                         dev_err(hellcreek->dev, "Failed to delete FDB entry!\n");
 852                         goto out;
 853                 }
 854
 855                 entry.portmask |= BIT(port);
 856
 857                 ret = __hellcreek_fdb_add(hellcreek, &entry);
 858                 if (ret) {
 859                         dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
 860                         goto out;
 861                 }
 862         }
 863
 864 out:
 865         mutex_unlock(&hellcreek->reg_lock);
 866
 867         return ret;
 868 }
 869
 870 static int hellcreek_fdb_del(struct dsa_switch *ds, int port,
 871                              const unsigned char *addr, u16 vid)
 872 {
 873         struct hellcreek_fdb_entry entry = { 0 };
 874         struct hellcreek *hellcreek = ds->priv;
 875         int ret;
 876
 877         dev_dbg(hellcreek->dev, "Delete FDB entry for MAC=%pM\n", addr);
 878
 879         mutex_lock(&hellcreek->reg_lock);
 880
 881         ret = hellcreek_fdb_get(hellcreek, addr, &entry);
 882         if (ret) {
 883                 /* Not found */
 884                 dev_err(hellcreek->dev, "FDB entry for deletion not found!\n");
 885         } else {
 886                 /* Found */
 887                 ret = __hellcreek_fdb_del(hellcreek, &entry);
 888                 if (ret) {
 889                         dev_err(hellcreek->dev, "Failed to delete FDB entry!\n");
 890                         goto out;
 891                 }
 892
 893                 entry.portmask &= ~BIT(port);
 894
 895                 if (entry.portmask != 0x00) {
 896                         ret = __hellcreek_fdb_add(hellcreek, &entry);
 897                         if (ret) {
 898                                 dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
 899                                 goto out;
 900                         }
 901                 }
 902         }
 903
 904 out:
 905         mutex_unlock(&hellcreek->reg_lock);
 906
 907         return ret;
 908 }
 909
 910 static int hellcreek_fdb_dump(struct dsa_switch *ds, int port,
 911                               dsa_fdb_dump_cb_t *cb, void *data)
 912 {
 913         struct hellcreek *hellcreek = ds->priv;
 914         u16 entries;
 915         size_t i;
 916
 917         mutex_lock(&hellcreek->reg_lock);
 918
 919         /* Set read pointer to zero: The read of HR_FDBMAX (read-only register)
 920          * should reset the internal pointer. But, that doesn't work. The vendor
 921          * suggested a subsequent write as workaround. Same for HR_FDBRDH below.
 922          */
 923         entries = hellcreek_read(hellcreek, HR_FDBMAX);
 924         hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
 925
 926         dev_dbg(hellcreek->dev, "FDB dump for port %d, entries=%d!\n", port, entries);
 927
 928         /* Read table */
 929         for (i = 0; i < hellcreek->fdb_entries; ++i) {
 930                 struct hellcreek_fdb_entry entry = { 0 };
 931
 932                 /* Read entry */
 933                 hellcreek_populate_fdb_entry(hellcreek, &entry, i);
 934
 935                 /* Force next entry */
 936                 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
 937
 938                 /* Check valid */
 939                 if (is_zero_ether_addr(entry.mac))
 940                         continue;
 941
 942                 /* Check port mask */
 943                 if (!(entry.portmask & BIT(port)))
 944                         continue;
 945
 946                 cb(entry.mac, 0, entry.is_static, data);
 947         }
 948
 949         mutex_unlock(&hellcreek->reg_lock);
 950
 951         return 0;
 952 }
 953
 954 static int hellcreek_vlan_filtering(struct dsa_switch *ds, int port,
 955                                     bool vlan_filtering,
 956                                     struct netlink_ext_ack *extack)
 957 {
 958         struct hellcreek *hellcreek = ds->priv;
 959
 960         dev_dbg(hellcreek->dev, "%s VLAN filtering on port %d\n",
 961                 vlan_filtering ? "Enable" : "Disable", port);
 962
 963         /* Configure port to drop packages with not known vids */
 964         hellcreek_setup_ingressflt(hellcreek, port, vlan_filtering);
 965
 966         /* Enable VLAN awareness on the switch. This save due to
 967          * ds->vlan_filtering_is_global.
 968          */
 969         hellcreek_setup_vlan_awareness(hellcreek, vlan_filtering);
 970
 971         return 0;
 972 }
 973
 974 static int hellcreek_enable_ip_core(struct hellcreek *hellcreek)
 975 {
 976         int ret;
 977         u16 val;
 978
 979         mutex_lock(&hellcreek->reg_lock);
 980
 981         val = hellcreek_read(hellcreek, HR_CTRL_C);
 982         val |= HR_CTRL_C_ENABLE;
 983         hellcreek_write(hellcreek, val, HR_CTRL_C);
 984         ret = hellcreek_wait_until_transitioned(hellcreek);
 985
 986         mutex_unlock(&hellcreek->reg_lock);
 987
 988         return ret;
 989 }
 990
 991 static void hellcreek_setup_cpu_and_tunnel_port(struct hellcreek *hellcreek)
 992 {
 993         struct hellcreek_port *tunnel_port = &hellcreek->ports[TUNNEL_PORT];
 994         struct hellcreek_port *cpu_port = &hellcreek->ports[CPU_PORT];
 995         u16 ptcfg = 0;
 996
 997         ptcfg |= HR_PTCFG_LEARNING_EN | HR_PTCFG_ADMIN_EN;
 998
 999         mutex_lock(&hellcreek->reg_lock);
1000
1001         hellcreek_select_port(hellcreek, CPU_PORT);
1002         hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1003
1004         hellcreek_select_port(hellcreek, TUNNEL_PORT);
1005         hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1006
1007         cpu_port->ptcfg    = ptcfg;
1008         tunnel_port->ptcfg = ptcfg;
1009
1010         mutex_unlock(&hellcreek->reg_lock);
1011 }
1012
1013 static void hellcreek_setup_tc_identity_mapping(struct hellcreek *hellcreek)
1014 {
1015         int i;
1016
1017         /* The switch has multiple egress queues per port. The queue is selected
1018          * via the PCP field in the VLAN header. The switch internally deals
1019          * with traffic classes instead of PCP values and this mapping is
1020          * configurable.
1021          *
1022          * The default mapping is (PCP - TC):
1023          *  7 - 7
1024          *  6 - 6
1025          *  5 - 5
1026          *  4 - 4
1027          *  3 - 3
1028          *  2 - 1
1029          *  1 - 0
1030          *  0 - 2
1031          *
1032          * The default should be an identity mapping.
1033          */
1034
1035         for (i = 0; i < 8; ++i) {
1036                 mutex_lock(&hellcreek->reg_lock);
1037
1038                 hellcreek_select_prio(hellcreek, i);
1039                 hellcreek_write(hellcreek,
1040                                 i << HR_PRTCCFG_PCP_TC_MAP_SHIFT,
1041                                 HR_PRTCCFG);
1042
1043                 mutex_unlock(&hellcreek->reg_lock);
1044         }
1045 }
1046
1047 static int hellcreek_setup_fdb(struct hellcreek *hellcreek)
1048 {
1049         static struct hellcreek_fdb_entry ptp = {
1050                 /* MAC: 01-1B-19-00-00-00 */
1051                 .mac          = { 0x01, 0x1b, 0x19, 0x00, 0x00, 0x00 },
1052                 .portmask     = 0x03,   /* Management ports */
1053                 .age          = 0,
1054                 .is_obt       = 0,
1055                 .pass_blocked = 0,
1056                 .is_static    = 1,
1057                 .reprio_tc    = 6,      /* TC: 6 as per IEEE 802.1AS */
1058                 .reprio_en    = 1,
1059         };
1060         static struct hellcreek_fdb_entry p2p = {
1061                 /* MAC: 01-80-C2-00-00-0E */
1062                 .mac          = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e },
1063                 .portmask     = 0x03,   /* Management ports */
1064                 .age          = 0,
1065                 .is_obt       = 0,
1066                 .pass_blocked = 0,
1067                 .is_static    = 1,
1068                 .reprio_tc    = 6,      /* TC: 6 as per IEEE 802.1AS */
1069                 .reprio_en    = 1,
1070         };
1071         int ret;
1072
1073         mutex_lock(&hellcreek->reg_lock);
1074         ret = __hellcreek_fdb_add(hellcreek, &ptp);
1075         if (ret)
1076                 goto out;
1077         ret = __hellcreek_fdb_add(hellcreek, &p2p);
1078 out:
1079         mutex_unlock(&hellcreek->reg_lock);
1080
1081         return ret;
1082 }
1083
1084 static int hellcreek_devlink_info_get(struct dsa_switch *ds,
1085                                       struct devlink_info_req *req,
1086                                       struct netlink_ext_ack *extack)
1087 {
1088         struct hellcreek *hellcreek = ds->priv;
1089         int ret;
1090
1091         ret = devlink_info_driver_name_put(req, "hellcreek");
1092         if (ret)
1093                 return ret;
1094
1095         return devlink_info_version_fixed_put(req,
1096                                               DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
1097                                               hellcreek->pdata->name);
1098 }
1099
1100 static u64 hellcreek_devlink_vlan_table_get(void *priv)
1101 {
1102         struct hellcreek *hellcreek = priv;
1103         u64 count = 0;
1104         int i;
1105
1106         mutex_lock(&hellcreek->reg_lock);
1107         for (i = 0; i < VLAN_N_VID; ++i)
1108                 if (hellcreek->vidmbrcfg[i])
1109                         count++;
1110         mutex_unlock(&hellcreek->reg_lock);
1111
1112         return count;
1113 }
1114
1115 static u64 hellcreek_devlink_fdb_table_get(void *priv)
1116 {
1117         struct hellcreek *hellcreek = priv;
1118         u64 count = 0;
1119
1120         /* Reading this register has side effects. Synchronize against the other
1121          * FDB operations.
1122          */
1123         mutex_lock(&hellcreek->reg_lock);
1124         count = hellcreek_read(hellcreek, HR_FDBMAX);
1125         mutex_unlock(&hellcreek->reg_lock);
1126
1127         return count;
1128 }
1129
1130 static int hellcreek_setup_devlink_resources(struct dsa_switch *ds)
1131 {
1132         struct devlink_resource_size_params size_vlan_params;
1133         struct devlink_resource_size_params size_fdb_params;
1134         struct hellcreek *hellcreek = ds->priv;
1135         int err;
1136
1137         devlink_resource_size_params_init(&size_vlan_params, VLAN_N_VID,
1138                                           VLAN_N_VID,
1139                                           1, DEVLINK_RESOURCE_UNIT_ENTRY);
1140
1141         devlink_resource_size_params_init(&size_fdb_params,
1142                                           hellcreek->fdb_entries,
1143                                           hellcreek->fdb_entries,
1144                                           1, DEVLINK_RESOURCE_UNIT_ENTRY);
1145
1146         err = dsa_devlink_resource_register(ds, "VLAN", VLAN_N_VID,
1147                                             HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1148                                             DEVLINK_RESOURCE_ID_PARENT_TOP,
1149                                             &size_vlan_params);
1150         if (err)
1151                 goto out;
1152
1153         err = dsa_devlink_resource_register(ds, "FDB", hellcreek->fdb_entries,
1154                                             HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1155                                             DEVLINK_RESOURCE_ID_PARENT_TOP,
1156                                             &size_fdb_params);
1157         if (err)
1158                 goto out;
1159
1160         dsa_devlink_resource_occ_get_register(ds,
1161                                               HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1162                                               hellcreek_devlink_vlan_table_get,
1163                                               hellcreek);
1164
1165         dsa_devlink_resource_occ_get_register(ds,
1166                                               HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1167                                               hellcreek_devlink_fdb_table_get,
1168                                               hellcreek);
1169
1170         return 0;
1171
1172 out:
1173         dsa_devlink_resources_unregister(ds);
1174
1175         return err;
1176 }
1177
1178 static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
1179                                                   const struct devlink_region_ops *ops,
1180                                                   struct netlink_ext_ack *extack,
1181                                                   u8 **data)
1182 {
1183         struct hellcreek_devlink_vlan_entry *table, *entry;
1184         struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1185         struct hellcreek *hellcreek = ds->priv;
1186         int i;
1187
1188         table = kcalloc(VLAN_N_VID, sizeof(*entry), GFP_KERNEL);
1189         if (!table)
1190                 return -ENOMEM;
1191
1192         entry = table;
1193
1194         mutex_lock(&hellcreek->reg_lock);
1195         for (i = 0; i < VLAN_N_VID; ++i, ++entry) {
1196                 entry->member = hellcreek->vidmbrcfg[i];
1197                 entry->vid    = i;
1198         }
1199         mutex_unlock(&hellcreek->reg_lock);
1200
1201         *data = (u8 *)table;
1202
1203         return 0;
1204 }
1205
1206 static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl,
1207                                                  const struct devlink_region_ops *ops,
1208                                                  struct netlink_ext_ack *extack,
1209                                                  u8 **data)
1210 {
1211         struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1212         struct hellcreek_fdb_entry *table, *entry;
1213         struct hellcreek *hellcreek = ds->priv;
1214         size_t i;
1215
1216         table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL);
1217         if (!table)
1218                 return -ENOMEM;
1219
1220         entry = table;
1221
1222         mutex_lock(&hellcreek->reg_lock);
1223
1224         /* Start table read */
1225         hellcreek_read(hellcreek, HR_FDBMAX);
1226         hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
1227
1228         for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) {
1229                 /* Read current entry */
1230                 hellcreek_populate_fdb_entry(hellcreek, entry, i);
1231
1232                 /* Advance read pointer */
1233                 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
1234         }
1235
1236         mutex_unlock(&hellcreek->reg_lock);
1237
1238         *data = (u8 *)table;
1239
1240         return 0;
1241 }
1242
1243 static struct devlink_region_ops hellcreek_region_vlan_ops = {
1244         .name       = "vlan",
1245         .snapshot   = hellcreek_devlink_region_vlan_snapshot,
1246         .destructor = kfree,
1247 };
1248
1249 static struct devlink_region_ops hellcreek_region_fdb_ops = {
1250         .name       = "fdb",
1251         .snapshot   = hellcreek_devlink_region_fdb_snapshot,
1252         .destructor = kfree,
1253 };
1254
1255 static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
1256 {
1257         struct hellcreek *hellcreek = ds->priv;
1258         struct devlink_region_ops *ops;
1259         struct devlink_region *region;
1260         u64 size;
1261         int ret;
1262
1263         /* VLAN table */
1264         size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
1265         ops  = &hellcreek_region_vlan_ops;
1266
1267         region = dsa_devlink_region_create(ds, ops, 1, size);
1268         if (IS_ERR(region))
1269                 return PTR_ERR(region);
1270
1271         hellcreek->vlan_region = region;
1272
1273         /* FDB table */
1274         size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry);
1275         ops  = &hellcreek_region_fdb_ops;
1276
1277         region = dsa_devlink_region_create(ds, ops, 1, size);
1278         if (IS_ERR(region)) {
1279                 ret = PTR_ERR(region);
1280                 goto err_fdb;
1281         }
1282
1283         hellcreek->fdb_region = region;
1284
1285         return 0;
1286
1287 err_fdb:
1288         dsa_devlink_region_destroy(hellcreek->vlan_region);
1289
1290         return ret;
1291 }
1292
1293 static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
1294 {
1295         struct hellcreek *hellcreek = ds->priv;
1296
1297         dsa_devlink_region_destroy(hellcreek->fdb_region);
1298         dsa_devlink_region_destroy(hellcreek->vlan_region);
1299 }
1300
1301 static int hellcreek_setup(struct dsa_switch *ds)
1302 {
1303         struct hellcreek *hellcreek = ds->priv;
1304         u16 swcfg = 0;
1305         int ret, i;
1306
1307         dev_dbg(hellcreek->dev, "Set up the switch\n");
1308
1309         /* Let's go */
1310         ret = hellcreek_enable_ip_core(hellcreek);
1311         if (ret) {
1312                 dev_err(hellcreek->dev, "Failed to enable IP core!\n");
1313                 return ret;
1314         }
1315
1316         /* Enable CPU/Tunnel ports */
1317         hellcreek_setup_cpu_and_tunnel_port(hellcreek);
1318
1319         /* Switch config: Keep defaults, enable FDB aging and learning and tag
1320          * each frame from/to cpu port for DSA tagging.  Also enable the length
1321          * aware shaping mode. This eliminates the need for Qbv guard bands.
1322          */
1323         swcfg |= HR_SWCFG_FDBAGE_EN |
1324                 HR_SWCFG_FDBLRN_EN  |
1325                 HR_SWCFG_ALWAYS_OBT |
1326                 (HR_SWCFG_LAS_ON << HR_SWCFG_LAS_MODE_SHIFT);
1327         hellcreek->swcfg = swcfg;
1328         hellcreek_write(hellcreek, swcfg, HR_SWCFG);
1329
1330         /* Initial vlan membership to reflect port separation */
1331         for (i = 0; i < ds->num_ports; ++i) {
1332                 if (!dsa_is_user_port(ds, i))
1333                         continue;
1334
1335                 hellcreek_setup_vlan_membership(ds, i, true);
1336         }
1337
1338         /* Configure PCP <-> TC mapping */
1339         hellcreek_setup_tc_identity_mapping(hellcreek);
1340
1341         /* The VLAN awareness is a global switch setting. Therefore, mixed vlan
1342          * filtering setups are not supported.
1343          */
1344         ds->vlan_filtering_is_global = true;
1345
1346         /* Intercept _all_ PTP multicast traffic */
1347         ret = hellcreek_setup_fdb(hellcreek);
1348         if (ret) {
1349                 dev_err(hellcreek->dev,
1350                         "Failed to insert static PTP FDB entries\n");
1351                 return ret;
1352         }
1353
1354         /* Register devlink resources with DSA */
1355         ret = hellcreek_setup_devlink_resources(ds);
1356         if (ret) {
1357                 dev_err(hellcreek->dev,
1358                         "Failed to setup devlink resources!\n");
1359                 return ret;
1360         }
1361
1362         ret = hellcreek_setup_devlink_regions(ds);
1363         if (ret) {
1364                 dev_err(hellcreek->dev,
1365                         "Failed to setup devlink regions!\n");
1366                 goto err_regions;
1367         }
1368
1369         return 0;
1370
1371 err_regions:
1372         dsa_devlink_resources_unregister(ds);
1373
1374         return ret;
1375 }
1376
1377 static void hellcreek_teardown(struct dsa_switch *ds)
1378 {
1379         hellcreek_teardown_devlink_regions(ds);
1380         dsa_devlink_resources_unregister(ds);
1381 }
1382
1383 static void hellcreek_phylink_validate(struct dsa_switch *ds, int port,
1384                                        unsigned long *supported,
1385                                        struct phylink_link_state *state)
1386 {
1387         __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
1388         struct hellcreek *hellcreek = ds->priv;
1389
1390         dev_dbg(hellcreek->dev, "Phylink validate for port %d\n", port);
1391
1392         /* The MAC settings are a hardware configuration option and cannot be
1393          * changed at run time or by strapping. Therefore the attached PHYs
1394          * should be programmed to only advertise settings which are supported
1395          * by the hardware.
1396          */
1397         if (hellcreek->pdata->is_100_mbits)
1398                 phylink_set(mask, 100baseT_Full);
1399         else
1400                 phylink_set(mask, 1000baseT_Full);
1401
1402         bitmap_and(supported, supported, mask,
1403                    __ETHTOOL_LINK_MODE_MASK_NBITS);
1404         bitmap_and(state->advertising, state->advertising, mask,
1405                    __ETHTOOL_LINK_MODE_MASK_NBITS);
1406 }
1407
1408 static int
1409 hellcreek_port_prechangeupper(struct dsa_switch *ds, int port,
1410                               struct netdev_notifier_changeupper_info *info)
1411 {
1412         struct hellcreek *hellcreek = ds->priv;
1413         bool used = true;
1414         int ret = -EBUSY;
1415         u16 vid;
1416         int i;
1417
1418         dev_dbg(hellcreek->dev, "Pre change upper for port %d\n", port);
1419
1420         /*
1421          * Deny VLAN devices on top of lan ports with the same VLAN ids, because
1422          * it breaks the port separation due to the private VLANs. Example:
1423          *
1424          * lan0.100 *and* lan1.100 cannot be used in parallel. However, lan0.99
1425          * and lan1.100 works.
1426          */
1427
1428         if (!is_vlan_dev(info->upper_dev))
1429                 return 0;
1430
1431         vid = vlan_dev_vlan_id(info->upper_dev);
1432
1433         /* For all ports, check bitmaps */
1434         mutex_lock(&hellcreek->vlan_lock);
1435         for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1436                 if (!dsa_is_user_port(ds, i))
1437                         continue;
1438
1439                 if (port == i)
1440                         continue;
1441
1442                 used = used && test_bit(vid, hellcreek->ports[i].vlan_dev_bitmap);
1443         }
1444
1445         if (used)
1446                 goto out;
1447
1448         /* Update bitmap */
1449         set_bit(vid, hellcreek->ports[port].vlan_dev_bitmap);
1450
1451         ret = 0;
1452
1453 out:
1454         mutex_unlock(&hellcreek->vlan_lock);
1455
1456         return ret;
1457 }
1458
1459 static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
1460                                 const struct tc_taprio_qopt_offload *schedule)
1461 {
1462         const struct tc_taprio_sched_entry *cur, *initial, *next;
1463         size_t i;
1464
1465         cur = initial = &schedule->entries[0];
1466         next = cur + 1;
1467
1468         for (i = 1; i <= schedule->num_entries; ++i) {
1469                 u16 data;
1470                 u8 gates;
1471
1472                 cur++;
1473                 next++;
1474
1475                 if (i == schedule->num_entries)
1476                         gates = initial->gate_mask ^
1477                                 cur->gate_mask;
1478                 else
1479                         gates = next->gate_mask ^
1480                                 cur->gate_mask;
1481
1482                 data = gates;
1483
1484                 if (i == schedule->num_entries)
1485                         data |= TR_GCLDAT_GCLWRLAST;
1486
1487                 /* Gates states */
1488                 hellcreek_write(hellcreek, data, TR_GCLDAT);
1489
1490                 /* Time interval */
1491                 hellcreek_write(hellcreek,
1492                                 cur->interval & 0x0000ffff,
1493                                 TR_GCLTIL);
1494                 hellcreek_write(hellcreek,
1495                                 (cur->interval & 0xffff0000) >> 16,
1496                                 TR_GCLTIH);
1497
1498                 /* Commit entry */
1499                 data = ((i - 1) << TR_GCLCMD_GCLWRADR_SHIFT) |
1500                         (initial->gate_mask <<
1501                          TR_GCLCMD_INIT_GATE_STATES_SHIFT);
1502                 hellcreek_write(hellcreek, data, TR_GCLCMD);
1503         }
1504 }
1505
1506 static void hellcreek_set_cycle_time(struct hellcreek *hellcreek,
1507                                      const struct tc_taprio_qopt_offload *schedule)
1508 {
1509         u32 cycle_time = schedule->cycle_time;
1510
1511         hellcreek_write(hellcreek, cycle_time & 0x0000ffff, TR_CTWRL);
1512         hellcreek_write(hellcreek, (cycle_time & 0xffff0000) >> 16, TR_CTWRH);
1513 }
1514
1515 static void hellcreek_switch_schedule(struct hellcreek *hellcreek,
1516                                       ktime_t start_time)
1517 {
1518         struct timespec64 ts = ktime_to_timespec64(start_time);
1519
1520         /* Start schedule at this point of time */
1521         hellcreek_write(hellcreek, ts.tv_nsec & 0x0000ffff, TR_ESTWRL);
1522         hellcreek_write(hellcreek, (ts.tv_nsec & 0xffff0000) >> 16, TR_ESTWRH);
1523
1524         /* Arm timer, set seconds and switch schedule */
1525         hellcreek_write(hellcreek, TR_ESTCMD_ESTARM | TR_ESTCMD_ESTSWCFG |
1526                         ((ts.tv_sec & TR_ESTCMD_ESTSEC_MASK) <<
1527                          TR_ESTCMD_ESTSEC_SHIFT), TR_ESTCMD);
1528 }
1529
1530 static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port)
1531 {
1532         struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1533         s64 base_time_ns, current_ns;
1534
1535         /* The switch allows a schedule to be started only eight seconds within
1536          * the future. Therefore, check the current PTP time if the schedule is
1537          * startable or not.
1538          */
1539
1540         /* Use the "cached" time. That should be alright, as it's updated quite
1541          * frequently in the PTP code.
1542          */
1543         mutex_lock(&hellcreek->ptp_lock);
1544         current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1545         mutex_unlock(&hellcreek->ptp_lock);
1546
1547         /* Calculate difference to admin base time */
1548         base_time_ns = ktime_to_ns(hellcreek_port->current_schedule->base_time);
1549
1550         return base_time_ns - current_ns < (s64)8 * NSEC_PER_SEC;
1551 }
1552
1553 static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port)
1554 {
1555         struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1556         ktime_t base_time, current_time;
1557         s64 current_ns;
1558         u32 cycle_time;
1559
1560         /* First select port */
1561         hellcreek_select_tgd(hellcreek, port);
1562
1563         /* Forward base time into the future if needed */
1564         mutex_lock(&hellcreek->ptp_lock);
1565         current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1566         mutex_unlock(&hellcreek->ptp_lock);
1567
1568         current_time = ns_to_ktime(current_ns);
1569         base_time    = hellcreek_port->current_schedule->base_time;
1570         cycle_time   = hellcreek_port->current_schedule->cycle_time;
1571
1572         if (ktime_compare(current_time, base_time) > 0) {
1573                 s64 n;
1574
1575                 n = div64_s64(ktime_sub_ns(current_time, base_time),
1576                               cycle_time);
1577                 base_time = ktime_add_ns(base_time, (n + 1) * cycle_time);
1578         }
1579
1580         /* Set admin base time and switch schedule */
1581         hellcreek_switch_schedule(hellcreek, base_time);
1582
1583         taprio_offload_free(hellcreek_port->current_schedule);
1584         hellcreek_port->current_schedule = NULL;
1585
1586         dev_dbg(hellcreek->dev, "Armed EST timer for port %d\n",
1587                 hellcreek_port->port);
1588 }
1589
1590 static void hellcreek_check_schedule(struct work_struct *work)
1591 {
1592         struct delayed_work *dw = to_delayed_work(work);
1593         struct hellcreek_port *hellcreek_port;
1594         struct hellcreek *hellcreek;
1595         bool startable;
1596
1597         hellcreek_port = dw_to_hellcreek_port(dw);
1598         hellcreek = hellcreek_port->hellcreek;
1599
1600         mutex_lock(&hellcreek->reg_lock);
1601
1602         /* Check starting time */
1603         startable = hellcreek_schedule_startable(hellcreek,
1604                                                  hellcreek_port->port);
1605         if (startable) {
1606                 hellcreek_start_schedule(hellcreek, hellcreek_port->port);
1607                 mutex_unlock(&hellcreek->reg_lock);
1608                 return;
1609         }
1610
1611         mutex_unlock(&hellcreek->reg_lock);
1612
1613         /* Reschedule */
1614         schedule_delayed_work(&hellcreek_port->schedule_work,
1615                               HELLCREEK_SCHEDULE_PERIOD);
1616 }
1617
1618 static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port,
1619                                        struct tc_taprio_qopt_offload *taprio)
1620 {
1621         struct hellcreek *hellcreek = ds->priv;
1622         struct hellcreek_port *hellcreek_port;
1623         bool startable;
1624         u16 ctrl;
1625
1626         hellcreek_port = &hellcreek->ports[port];
1627
1628         dev_dbg(hellcreek->dev, "Configure traffic schedule on port %d\n",
1629                 port);
1630
1631         /* First cancel delayed work */
1632         cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1633
1634         mutex_lock(&hellcreek->reg_lock);
1635
1636         if (hellcreek_port->current_schedule) {
1637                 taprio_offload_free(hellcreek_port->current_schedule);
1638                 hellcreek_port->current_schedule = NULL;
1639         }
1640         hellcreek_port->current_schedule = taprio_offload_get(taprio);
1641
1642         /* Then select port */
1643         hellcreek_select_tgd(hellcreek, port);
1644
1645         /* Enable gating and keep defaults */
1646         ctrl = (0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT) | TR_TGDCTRL_GATE_EN;
1647         hellcreek_write(hellcreek, ctrl, TR_TGDCTRL);
1648
1649         /* Cancel pending schedule */
1650         hellcreek_write(hellcreek, 0x00, TR_ESTCMD);
1651
1652         /* Setup a new schedule */
1653         hellcreek_setup_gcl(hellcreek, port, hellcreek_port->current_schedule);
1654
1655         /* Configure cycle time */
1656         hellcreek_set_cycle_time(hellcreek, hellcreek_port->current_schedule);
1657
1658         /* Check starting time */
1659         startable = hellcreek_schedule_startable(hellcreek, port);
1660         if (startable) {
1661                 hellcreek_start_schedule(hellcreek, port);
1662                 mutex_unlock(&hellcreek->reg_lock);
1663                 return 0;
1664         }
1665
1666         mutex_unlock(&hellcreek->reg_lock);
1667
1668         /* Schedule periodic schedule check */
1669         schedule_delayed_work(&hellcreek_port->schedule_work,
1670                               HELLCREEK_SCHEDULE_PERIOD);
1671
1672         return 0;
1673 }
1674
1675 static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port)
1676 {
1677         struct hellcreek *hellcreek = ds->priv;
1678         struct hellcreek_port *hellcreek_port;
1679
1680         hellcreek_port = &hellcreek->ports[port];
1681
1682         dev_dbg(hellcreek->dev, "Remove traffic schedule on port %d\n", port);
1683
1684         /* First cancel delayed work */
1685         cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1686
1687         mutex_lock(&hellcreek->reg_lock);
1688
1689         if (hellcreek_port->current_schedule) {
1690                 taprio_offload_free(hellcreek_port->current_schedule);
1691                 hellcreek_port->current_schedule = NULL;
1692         }
1693
1694         /* Then select port */
1695         hellcreek_select_tgd(hellcreek, port);
1696
1697         /* Disable gating and return to regular switching flow */
1698         hellcreek_write(hellcreek, 0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT,
1699                         TR_TGDCTRL);
1700
1701         mutex_unlock(&hellcreek->reg_lock);
1702
1703         return 0;
1704 }
1705
1706 static bool hellcreek_validate_schedule(struct hellcreek *hellcreek,
1707                                         struct tc_taprio_qopt_offload *schedule)
1708 {
1709         size_t i;
1710
1711         /* Does this hellcreek version support Qbv in hardware? */
1712         if (!hellcreek->pdata->qbv_support)
1713                 return false;
1714
1715         /* cycle time can only be 32bit */
1716         if (schedule->cycle_time > (u32)-1)
1717                 return false;
1718
1719         /* cycle time extension is not supported */
1720         if (schedule->cycle_time_extension)
1721                 return false;
1722
1723         /* Only set command is supported */
1724         for (i = 0; i < schedule->num_entries; ++i)
1725                 if (schedule->entries[i].command != TC_TAPRIO_CMD_SET_GATES)
1726                         return false;
1727
1728         return true;
1729 }
1730
1731 static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port,
1732                                    enum tc_setup_type type, void *type_data)
1733 {
1734         struct tc_taprio_qopt_offload *taprio = type_data;
1735         struct hellcreek *hellcreek = ds->priv;
1736
1737         if (type != TC_SETUP_QDISC_TAPRIO)
1738                 return -EOPNOTSUPP;
1739
1740         if (!hellcreek_validate_schedule(hellcreek, taprio))
1741                 return -EOPNOTSUPP;
1742
1743         if (taprio->enable)
1744                 return hellcreek_port_set_schedule(ds, port, taprio);
1745
1746         return hellcreek_port_del_schedule(ds, port);
1747 }
1748
1749 static const struct dsa_switch_ops hellcreek_ds_ops = {
1750         .devlink_info_get      = hellcreek_devlink_info_get,
1751         .get_ethtool_stats     = hellcreek_get_ethtool_stats,
1752         .get_sset_count        = hellcreek_get_sset_count,
1753         .get_strings           = hellcreek_get_strings,
1754         .get_tag_protocol      = hellcreek_get_tag_protocol,
1755         .get_ts_info           = hellcreek_get_ts_info,
1756         .phylink_validate      = hellcreek_phylink_validate,
1757         .port_bridge_flags     = hellcreek_bridge_flags,
1758         .port_bridge_join      = hellcreek_port_bridge_join,
1759         .port_bridge_leave     = hellcreek_port_bridge_leave,
1760         .port_disable          = hellcreek_port_disable,
1761         .port_enable           = hellcreek_port_enable,
1762         .port_fdb_add          = hellcreek_fdb_add,
1763         .port_fdb_del          = hellcreek_fdb_del,
1764         .port_fdb_dump         = hellcreek_fdb_dump,
1765         .port_hwtstamp_set     = hellcreek_port_hwtstamp_set,
1766         .port_hwtstamp_get     = hellcreek_port_hwtstamp_get,
1767         .port_pre_bridge_flags = hellcreek_pre_bridge_flags,
1768         .port_prechangeupper   = hellcreek_port_prechangeupper,
1769         .port_rxtstamp         = hellcreek_port_rxtstamp,
1770         .port_setup_tc         = hellcreek_port_setup_tc,
1771         .port_stp_state_set    = hellcreek_port_stp_state_set,
1772         .port_txtstamp         = hellcreek_port_txtstamp,
1773         .port_vlan_add         = hellcreek_vlan_add,
1774         .port_vlan_del         = hellcreek_vlan_del,
1775         .port_vlan_filtering   = hellcreek_vlan_filtering,
1776         .setup                 = hellcreek_setup,
1777         .teardown              = hellcreek_teardown,
1778 };
1779
1780 static int hellcreek_probe(struct platform_device *pdev)
1781 {
1782         struct device *dev = &pdev->dev;
1783         struct hellcreek *hellcreek;
1784         struct resource *res;
1785         int ret, i;
1786
1787         hellcreek = devm_kzalloc(dev, sizeof(*hellcreek), GFP_KERNEL);
1788         if (!hellcreek)
1789                 return -ENOMEM;
1790
1791         hellcreek->vidmbrcfg = devm_kcalloc(dev, VLAN_N_VID,
1792                                             sizeof(*hellcreek->vidmbrcfg),
1793                                             GFP_KERNEL);
1794         if (!hellcreek->vidmbrcfg)
1795                 return -ENOMEM;
1796
1797         hellcreek->pdata = of_device_get_match_data(dev);
1798
1799         hellcreek->ports = devm_kcalloc(dev, hellcreek->pdata->num_ports,
1800                                         sizeof(*hellcreek->ports),
1801                                         GFP_KERNEL);
1802         if (!hellcreek->ports)
1803                 return -ENOMEM;
1804
1805         for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1806                 struct hellcreek_port *port = &hellcreek->ports[i];
1807
1808                 port->counter_values =
1809                         devm_kcalloc(dev,
1810                                      ARRAY_SIZE(hellcreek_counter),
1811                                      sizeof(*port->counter_values),
1812                                      GFP_KERNEL);
1813                 if (!port->counter_values)
1814                         return -ENOMEM;
1815
1816                 port->vlan_dev_bitmap =
1817                         devm_kcalloc(dev,
1818                                      BITS_TO_LONGS(VLAN_N_VID),
1819                                      sizeof(unsigned long),
1820                                      GFP_KERNEL);
1821                 if (!port->vlan_dev_bitmap)
1822                         return -ENOMEM;
1823
1824                 port->hellcreek = hellcreek;
1825                 port->port      = i;
1826
1827                 INIT_DELAYED_WORK(&port->schedule_work,
1828                                   hellcreek_check_schedule);
1829         }
1830
1831         mutex_init(&hellcreek->reg_lock);
1832         mutex_init(&hellcreek->vlan_lock);
1833         mutex_init(&hellcreek->ptp_lock);
1834
1835         hellcreek->dev = dev;
1836
1837         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tsn");
1838         if (!res) {
1839                 dev_err(dev, "No memory region provided!\n");
1840                 return -ENODEV;
1841         }
1842
1843         hellcreek->base = devm_ioremap_resource(dev, res);
1844         if (IS_ERR(hellcreek->base))
1845                 return PTR_ERR(hellcreek->base);
1846
1847         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ptp");
1848         if (!res) {
1849                 dev_err(dev, "No PTP memory region provided!\n");
1850                 return -ENODEV;
1851         }
1852
1853         hellcreek->ptp_base = devm_ioremap_resource(dev, res);
1854         if (IS_ERR(hellcreek->ptp_base))
1855                 return PTR_ERR(hellcreek->ptp_base);
1856
1857         ret = hellcreek_detect(hellcreek);
1858         if (ret) {
1859                 dev_err(dev, "No (known) chip found!\n");
1860                 return ret;
1861         }
1862
1863         ret = hellcreek_wait_until_ready(hellcreek);
1864         if (ret) {
1865                 dev_err(dev, "Switch didn't become ready!\n");
1866                 return ret;
1867         }
1868
1869         hellcreek_feature_detect(hellcreek);
1870
1871         hellcreek->ds = devm_kzalloc(dev, sizeof(*hellcreek->ds), GFP_KERNEL);
1872         if (!hellcreek->ds)
1873                 return -ENOMEM;
1874
1875         hellcreek->ds->dev           = dev;
1876         hellcreek->ds->priv          = hellcreek;
1877         hellcreek->ds->ops           = &hellcreek_ds_ops;
1878         hellcreek->ds->num_ports     = hellcreek->pdata->num_ports;
1879         hellcreek->ds->num_tx_queues = HELLCREEK_NUM_EGRESS_QUEUES;
1880
1881         ret = dsa_register_switch(hellcreek->ds);
1882         if (ret) {
1883                 dev_err_probe(dev, ret, "Unable to register switch\n");
1884                 return ret;
1885         }
1886
1887         ret = hellcreek_ptp_setup(hellcreek);
1888         if (ret) {
1889                 dev_err(dev, "Failed to setup PTP!\n");
1890                 goto err_ptp_setup;
1891         }
1892
1893         ret = hellcreek_hwtstamp_setup(hellcreek);
1894         if (ret) {
1895                 dev_err(dev, "Failed to setup hardware timestamping!\n");
1896                 goto err_tstamp_setup;
1897         }
1898
1899         platform_set_drvdata(pdev, hellcreek);
1900
1901         return 0;
1902
1903 err_tstamp_setup:
1904         hellcreek_ptp_free(hellcreek);
1905 err_ptp_setup:
1906         dsa_unregister_switch(hellcreek->ds);
1907
1908         return ret;
1909 }
1910
1911 static int hellcreek_remove(struct platform_device *pdev)
1912 {
1913         struct hellcreek *hellcreek = platform_get_drvdata(pdev);
1914
1915         hellcreek_hwtstamp_free(hellcreek);
1916         hellcreek_ptp_free(hellcreek);
1917         dsa_unregister_switch(hellcreek->ds);
1918         platform_set_drvdata(pdev, NULL);
1919
1920         return 0;
1921 }
1922
1923 static const struct hellcreek_platform_data de1soc_r1_pdata = {
1924         .name            = "r4c30",
1925         .num_ports       = 4,
1926         .is_100_mbits    = 1,
1927         .qbv_support     = 1,
1928         .qbv_on_cpu_port = 1,
1929         .qbu_support     = 0,
1930         .module_id       = 0x4c30,
1931 };
1932
1933 static const struct of_device_id hellcreek_of_match[] = {
1934         {
1935                 .compatible = "hirschmann,hellcreek-de1soc-r1",
1936                 .data       = &de1soc_r1_pdata,
1937         },
1938         { /* sentinel */ },
1939 };
1940 MODULE_DEVICE_TABLE(of, hellcreek_of_match);
1941
1942 static struct platform_driver hellcreek_driver = {
1943         .probe  = hellcreek_probe,
1944         .remove = hellcreek_remove,
1945         .driver = {
1946                 .name = "hellcreek",
1947                 .of_match_table = hellcreek_of_match,
1948         },
1949 };
1950 module_platform_driver(hellcreek_driver);
1951
1952 MODULE_AUTHOR("Kurt Kanzenbach <kurt@linutronix.de>");
1953 MODULE_DESCRIPTION("Hirschmann Hellcreek driver");
1954 MODULE_LICENSE("Dual MIT/GPL");