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         int ret = 0;
 916         size_t i;
 917
 918         mutex_lock(&hellcreek->reg_lock);
 919
 920         /* Set read pointer to zero: The read of HR_FDBMAX (read-only register)
 921          * should reset the internal pointer. But, that doesn't work. The vendor
 922          * suggested a subsequent write as workaround. Same for HR_FDBRDH below.
 923          */
 924         entries = hellcreek_read(hellcreek, HR_FDBMAX);
 925         hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
 926
 927         dev_dbg(hellcreek->dev, "FDB dump for port %d, entries=%d!\n", port, entries);
 928
 929         /* Read table */
 930         for (i = 0; i < hellcreek->fdb_entries; ++i) {
 931                 struct hellcreek_fdb_entry entry = { 0 };
 932
 933                 /* Read entry */
 934                 hellcreek_populate_fdb_entry(hellcreek, &entry, i);
 935
 936                 /* Force next entry */
 937                 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
 938
 939                 /* Check valid */
 940                 if (is_zero_ether_addr(entry.mac))
 941                         continue;
 942
 943                 /* Check port mask */
 944                 if (!(entry.portmask & BIT(port)))
 945                         continue;
 946
 947                 ret = cb(entry.mac, 0, entry.is_static, data);
 948                 if (ret)
 949                         break;
 950         }
 951
 952         mutex_unlock(&hellcreek->reg_lock);
 953
 954         return ret;
 955 }
 956
 957 static int hellcreek_vlan_filtering(struct dsa_switch *ds, int port,
 958                                     bool vlan_filtering,
 959                                     struct netlink_ext_ack *extack)
 960 {
 961         struct hellcreek *hellcreek = ds->priv;
 962
 963         dev_dbg(hellcreek->dev, "%s VLAN filtering on port %d\n",
 964                 vlan_filtering ? "Enable" : "Disable", port);
 965
 966         /* Configure port to drop packages with not known vids */
 967         hellcreek_setup_ingressflt(hellcreek, port, vlan_filtering);
 968
 969         /* Enable VLAN awareness on the switch. This save due to
 970          * ds->vlan_filtering_is_global.
 971          */
 972         hellcreek_setup_vlan_awareness(hellcreek, vlan_filtering);
 973
 974         return 0;
 975 }
 976
 977 static int hellcreek_enable_ip_core(struct hellcreek *hellcreek)
 978 {
 979         int ret;
 980         u16 val;
 981
 982         mutex_lock(&hellcreek->reg_lock);
 983
 984         val = hellcreek_read(hellcreek, HR_CTRL_C);
 985         val |= HR_CTRL_C_ENABLE;
 986         hellcreek_write(hellcreek, val, HR_CTRL_C);
 987         ret = hellcreek_wait_until_transitioned(hellcreek);
 988
 989         mutex_unlock(&hellcreek->reg_lock);
 990
 991         return ret;
 992 }
 993
 994 static void hellcreek_setup_cpu_and_tunnel_port(struct hellcreek *hellcreek)
 995 {
 996         struct hellcreek_port *tunnel_port = &hellcreek->ports[TUNNEL_PORT];
 997         struct hellcreek_port *cpu_port = &hellcreek->ports[CPU_PORT];
 998         u16 ptcfg = 0;
 999
1000         ptcfg |= HR_PTCFG_LEARNING_EN | HR_PTCFG_ADMIN_EN;
1001
1002         mutex_lock(&hellcreek->reg_lock);
1003
1004         hellcreek_select_port(hellcreek, CPU_PORT);
1005         hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1006
1007         hellcreek_select_port(hellcreek, TUNNEL_PORT);
1008         hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1009
1010         cpu_port->ptcfg    = ptcfg;
1011         tunnel_port->ptcfg = ptcfg;
1012
1013         mutex_unlock(&hellcreek->reg_lock);
1014 }
1015
1016 static void hellcreek_setup_tc_identity_mapping(struct hellcreek *hellcreek)
1017 {
1018         int i;
1019
1020         /* The switch has multiple egress queues per port. The queue is selected
1021          * via the PCP field in the VLAN header. The switch internally deals
1022          * with traffic classes instead of PCP values and this mapping is
1023          * configurable.
1024          *
1025          * The default mapping is (PCP - TC):
1026          *  7 - 7
1027          *  6 - 6
1028          *  5 - 5
1029          *  4 - 4
1030          *  3 - 3
1031          *  2 - 1
1032          *  1 - 0
1033          *  0 - 2
1034          *
1035          * The default should be an identity mapping.
1036          */
1037
1038         for (i = 0; i < 8; ++i) {
1039                 mutex_lock(&hellcreek->reg_lock);
1040
1041                 hellcreek_select_prio(hellcreek, i);
1042                 hellcreek_write(hellcreek,
1043                                 i << HR_PRTCCFG_PCP_TC_MAP_SHIFT,
1044                                 HR_PRTCCFG);
1045
1046                 mutex_unlock(&hellcreek->reg_lock);
1047         }
1048 }
1049
1050 static int hellcreek_setup_fdb(struct hellcreek *hellcreek)
1051 {
1052         static struct hellcreek_fdb_entry ptp = {
1053                 /* MAC: 01-1B-19-00-00-00 */
1054                 .mac          = { 0x01, 0x1b, 0x19, 0x00, 0x00, 0x00 },
1055                 .portmask     = 0x03,   /* Management ports */
1056                 .age          = 0,
1057                 .is_obt       = 0,
1058                 .pass_blocked = 0,
1059                 .is_static    = 1,
1060                 .reprio_tc    = 6,      /* TC: 6 as per IEEE 802.1AS */
1061                 .reprio_en    = 1,
1062         };
1063         static struct hellcreek_fdb_entry p2p = {
1064                 /* MAC: 01-80-C2-00-00-0E */
1065                 .mac          = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e },
1066                 .portmask     = 0x03,   /* Management ports */
1067                 .age          = 0,
1068                 .is_obt       = 0,
1069                 .pass_blocked = 0,
1070                 .is_static    = 1,
1071                 .reprio_tc    = 6,      /* TC: 6 as per IEEE 802.1AS */
1072                 .reprio_en    = 1,
1073         };
1074         int ret;
1075
1076         mutex_lock(&hellcreek->reg_lock);
1077         ret = __hellcreek_fdb_add(hellcreek, &ptp);
1078         if (ret)
1079                 goto out;
1080         ret = __hellcreek_fdb_add(hellcreek, &p2p);
1081 out:
1082         mutex_unlock(&hellcreek->reg_lock);
1083
1084         return ret;
1085 }
1086
1087 static int hellcreek_devlink_info_get(struct dsa_switch *ds,
1088                                       struct devlink_info_req *req,
1089                                       struct netlink_ext_ack *extack)
1090 {
1091         struct hellcreek *hellcreek = ds->priv;
1092         int ret;
1093
1094         ret = devlink_info_driver_name_put(req, "hellcreek");
1095         if (ret)
1096                 return ret;
1097
1098         return devlink_info_version_fixed_put(req,
1099                                               DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
1100                                               hellcreek->pdata->name);
1101 }
1102
1103 static u64 hellcreek_devlink_vlan_table_get(void *priv)
1104 {
1105         struct hellcreek *hellcreek = priv;
1106         u64 count = 0;
1107         int i;
1108
1109         mutex_lock(&hellcreek->reg_lock);
1110         for (i = 0; i < VLAN_N_VID; ++i)
1111                 if (hellcreek->vidmbrcfg[i])
1112                         count++;
1113         mutex_unlock(&hellcreek->reg_lock);
1114
1115         return count;
1116 }
1117
1118 static u64 hellcreek_devlink_fdb_table_get(void *priv)
1119 {
1120         struct hellcreek *hellcreek = priv;
1121         u64 count = 0;
1122
1123         /* Reading this register has side effects. Synchronize against the other
1124          * FDB operations.
1125          */
1126         mutex_lock(&hellcreek->reg_lock);
1127         count = hellcreek_read(hellcreek, HR_FDBMAX);
1128         mutex_unlock(&hellcreek->reg_lock);
1129
1130         return count;
1131 }
1132
1133 static int hellcreek_setup_devlink_resources(struct dsa_switch *ds)
1134 {
1135         struct devlink_resource_size_params size_vlan_params;
1136         struct devlink_resource_size_params size_fdb_params;
1137         struct hellcreek *hellcreek = ds->priv;
1138         int err;
1139
1140         devlink_resource_size_params_init(&size_vlan_params, VLAN_N_VID,
1141                                           VLAN_N_VID,
1142                                           1, DEVLINK_RESOURCE_UNIT_ENTRY);
1143
1144         devlink_resource_size_params_init(&size_fdb_params,
1145                                           hellcreek->fdb_entries,
1146                                           hellcreek->fdb_entries,
1147                                           1, DEVLINK_RESOURCE_UNIT_ENTRY);
1148
1149         err = dsa_devlink_resource_register(ds, "VLAN", VLAN_N_VID,
1150                                             HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1151                                             DEVLINK_RESOURCE_ID_PARENT_TOP,
1152                                             &size_vlan_params);
1153         if (err)
1154                 goto out;
1155
1156         err = dsa_devlink_resource_register(ds, "FDB", hellcreek->fdb_entries,
1157                                             HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1158                                             DEVLINK_RESOURCE_ID_PARENT_TOP,
1159                                             &size_fdb_params);
1160         if (err)
1161                 goto out;
1162
1163         dsa_devlink_resource_occ_get_register(ds,
1164                                               HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1165                                               hellcreek_devlink_vlan_table_get,
1166                                               hellcreek);
1167
1168         dsa_devlink_resource_occ_get_register(ds,
1169                                               HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1170                                               hellcreek_devlink_fdb_table_get,
1171                                               hellcreek);
1172
1173         return 0;
1174
1175 out:
1176         dsa_devlink_resources_unregister(ds);
1177
1178         return err;
1179 }
1180
1181 static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
1182                                                   const struct devlink_region_ops *ops,
1183                                                   struct netlink_ext_ack *extack,
1184                                                   u8 **data)
1185 {
1186         struct hellcreek_devlink_vlan_entry *table, *entry;
1187         struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1188         struct hellcreek *hellcreek = ds->priv;
1189         int i;
1190
1191         table = kcalloc(VLAN_N_VID, sizeof(*entry), GFP_KERNEL);
1192         if (!table)
1193                 return -ENOMEM;
1194
1195         entry = table;
1196
1197         mutex_lock(&hellcreek->reg_lock);
1198         for (i = 0; i < VLAN_N_VID; ++i, ++entry) {
1199                 entry->member = hellcreek->vidmbrcfg[i];
1200                 entry->vid    = i;
1201         }
1202         mutex_unlock(&hellcreek->reg_lock);
1203
1204         *data = (u8 *)table;
1205
1206         return 0;
1207 }
1208
1209 static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl,
1210                                                  const struct devlink_region_ops *ops,
1211                                                  struct netlink_ext_ack *extack,
1212                                                  u8 **data)
1213 {
1214         struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1215         struct hellcreek_fdb_entry *table, *entry;
1216         struct hellcreek *hellcreek = ds->priv;
1217         size_t i;
1218
1219         table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL);
1220         if (!table)
1221                 return -ENOMEM;
1222
1223         entry = table;
1224
1225         mutex_lock(&hellcreek->reg_lock);
1226
1227         /* Start table read */
1228         hellcreek_read(hellcreek, HR_FDBMAX);
1229         hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
1230
1231         for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) {
1232                 /* Read current entry */
1233                 hellcreek_populate_fdb_entry(hellcreek, entry, i);
1234
1235                 /* Advance read pointer */
1236                 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
1237         }
1238
1239         mutex_unlock(&hellcreek->reg_lock);
1240
1241         *data = (u8 *)table;
1242
1243         return 0;
1244 }
1245
1246 static struct devlink_region_ops hellcreek_region_vlan_ops = {
1247         .name       = "vlan",
1248         .snapshot   = hellcreek_devlink_region_vlan_snapshot,
1249         .destructor = kfree,
1250 };
1251
1252 static struct devlink_region_ops hellcreek_region_fdb_ops = {
1253         .name       = "fdb",
1254         .snapshot   = hellcreek_devlink_region_fdb_snapshot,
1255         .destructor = kfree,
1256 };
1257
1258 static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
1259 {
1260         struct hellcreek *hellcreek = ds->priv;
1261         struct devlink_region_ops *ops;
1262         struct devlink_region *region;
1263         u64 size;
1264         int ret;
1265
1266         /* VLAN table */
1267         size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
1268         ops  = &hellcreek_region_vlan_ops;
1269
1270         region = dsa_devlink_region_create(ds, ops, 1, size);
1271         if (IS_ERR(region))
1272                 return PTR_ERR(region);
1273
1274         hellcreek->vlan_region = region;
1275
1276         /* FDB table */
1277         size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry);
1278         ops  = &hellcreek_region_fdb_ops;
1279
1280         region = dsa_devlink_region_create(ds, ops, 1, size);
1281         if (IS_ERR(region)) {
1282                 ret = PTR_ERR(region);
1283                 goto err_fdb;
1284         }
1285
1286         hellcreek->fdb_region = region;
1287
1288         return 0;
1289
1290 err_fdb:
1291         dsa_devlink_region_destroy(hellcreek->vlan_region);
1292
1293         return ret;
1294 }
1295
1296 static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
1297 {
1298         struct hellcreek *hellcreek = ds->priv;
1299
1300         dsa_devlink_region_destroy(hellcreek->fdb_region);
1301         dsa_devlink_region_destroy(hellcreek->vlan_region);
1302 }
1303
1304 static int hellcreek_setup(struct dsa_switch *ds)
1305 {
1306         struct hellcreek *hellcreek = ds->priv;
1307         u16 swcfg = 0;
1308         int ret, i;
1309
1310         dev_dbg(hellcreek->dev, "Set up the switch\n");
1311
1312         /* Let's go */
1313         ret = hellcreek_enable_ip_core(hellcreek);
1314         if (ret) {
1315                 dev_err(hellcreek->dev, "Failed to enable IP core!\n");
1316                 return ret;
1317         }
1318
1319         /* Enable CPU/Tunnel ports */
1320         hellcreek_setup_cpu_and_tunnel_port(hellcreek);
1321
1322         /* Switch config: Keep defaults, enable FDB aging and learning and tag
1323          * each frame from/to cpu port for DSA tagging.  Also enable the length
1324          * aware shaping mode. This eliminates the need for Qbv guard bands.
1325          */
1326         swcfg |= HR_SWCFG_FDBAGE_EN |
1327                 HR_SWCFG_FDBLRN_EN  |
1328                 HR_SWCFG_ALWAYS_OBT |
1329                 (HR_SWCFG_LAS_ON << HR_SWCFG_LAS_MODE_SHIFT);
1330         hellcreek->swcfg = swcfg;
1331         hellcreek_write(hellcreek, swcfg, HR_SWCFG);
1332
1333         /* Initial vlan membership to reflect port separation */
1334         for (i = 0; i < ds->num_ports; ++i) {
1335                 if (!dsa_is_user_port(ds, i))
1336                         continue;
1337
1338                 hellcreek_setup_vlan_membership(ds, i, true);
1339         }
1340
1341         /* Configure PCP <-> TC mapping */
1342         hellcreek_setup_tc_identity_mapping(hellcreek);
1343
1344         /* The VLAN awareness is a global switch setting. Therefore, mixed vlan
1345          * filtering setups are not supported.
1346          */
1347         ds->vlan_filtering_is_global = true;
1348         ds->needs_standalone_vlan_filtering = true;
1349
1350         /* Intercept _all_ PTP multicast traffic */
1351         ret = hellcreek_setup_fdb(hellcreek);
1352         if (ret) {
1353                 dev_err(hellcreek->dev,
1354                         "Failed to insert static PTP FDB entries\n");
1355                 return ret;
1356         }
1357
1358         /* Register devlink resources with DSA */
1359         ret = hellcreek_setup_devlink_resources(ds);
1360         if (ret) {
1361                 dev_err(hellcreek->dev,
1362                         "Failed to setup devlink resources!\n");
1363                 return ret;
1364         }
1365
1366         ret = hellcreek_setup_devlink_regions(ds);
1367         if (ret) {
1368                 dev_err(hellcreek->dev,
1369                         "Failed to setup devlink regions!\n");
1370                 goto err_regions;
1371         }
1372
1373         return 0;
1374
1375 err_regions:
1376         dsa_devlink_resources_unregister(ds);
1377
1378         return ret;
1379 }
1380
1381 static void hellcreek_teardown(struct dsa_switch *ds)
1382 {
1383         hellcreek_teardown_devlink_regions(ds);
1384         dsa_devlink_resources_unregister(ds);
1385 }
1386
1387 static void hellcreek_phylink_validate(struct dsa_switch *ds, int port,
1388                                        unsigned long *supported,
1389                                        struct phylink_link_state *state)
1390 {
1391         __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
1392         struct hellcreek *hellcreek = ds->priv;
1393
1394         dev_dbg(hellcreek->dev, "Phylink validate for port %d\n", port);
1395
1396         /* The MAC settings are a hardware configuration option and cannot be
1397          * changed at run time or by strapping. Therefore the attached PHYs
1398          * should be programmed to only advertise settings which are supported
1399          * by the hardware.
1400          */
1401         if (hellcreek->pdata->is_100_mbits)
1402                 phylink_set(mask, 100baseT_Full);
1403         else
1404                 phylink_set(mask, 1000baseT_Full);
1405
1406         bitmap_and(supported, supported, mask,
1407                    __ETHTOOL_LINK_MODE_MASK_NBITS);
1408         bitmap_and(state->advertising, state->advertising, mask,
1409                    __ETHTOOL_LINK_MODE_MASK_NBITS);
1410 }
1411
1412 static int
1413 hellcreek_port_prechangeupper(struct dsa_switch *ds, int port,
1414                               struct netdev_notifier_changeupper_info *info)
1415 {
1416         struct hellcreek *hellcreek = ds->priv;
1417         bool used = true;
1418         int ret = -EBUSY;
1419         u16 vid;
1420         int i;
1421
1422         dev_dbg(hellcreek->dev, "Pre change upper for port %d\n", port);
1423
1424         /*
1425          * Deny VLAN devices on top of lan ports with the same VLAN ids, because
1426          * it breaks the port separation due to the private VLANs. Example:
1427          *
1428          * lan0.100 *and* lan1.100 cannot be used in parallel. However, lan0.99
1429          * and lan1.100 works.
1430          */
1431
1432         if (!is_vlan_dev(info->upper_dev))
1433                 return 0;
1434
1435         vid = vlan_dev_vlan_id(info->upper_dev);
1436
1437         /* For all ports, check bitmaps */
1438         mutex_lock(&hellcreek->vlan_lock);
1439         for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1440                 if (!dsa_is_user_port(ds, i))
1441                         continue;
1442
1443                 if (port == i)
1444                         continue;
1445
1446                 used = used && test_bit(vid, hellcreek->ports[i].vlan_dev_bitmap);
1447         }
1448
1449         if (used)
1450                 goto out;
1451
1452         /* Update bitmap */
1453         set_bit(vid, hellcreek->ports[port].vlan_dev_bitmap);
1454
1455         ret = 0;
1456
1457 out:
1458         mutex_unlock(&hellcreek->vlan_lock);
1459
1460         return ret;
1461 }
1462
1463 static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
1464                                 const struct tc_taprio_qopt_offload *schedule)
1465 {
1466         const struct tc_taprio_sched_entry *cur, *initial, *next;
1467         size_t i;
1468
1469         cur = initial = &schedule->entries[0];
1470         next = cur + 1;
1471
1472         for (i = 1; i <= schedule->num_entries; ++i) {
1473                 u16 data;
1474                 u8 gates;
1475
1476                 if (i == schedule->num_entries)
1477                         gates = initial->gate_mask ^
1478                                 cur->gate_mask;
1479                 else
1480                         gates = next->gate_mask ^
1481                                 cur->gate_mask;
1482
1483                 data = gates;
1484
1485                 if (i == schedule->num_entries)
1486                         data |= TR_GCLDAT_GCLWRLAST;
1487
1488                 /* Gates states */
1489                 hellcreek_write(hellcreek, data, TR_GCLDAT);
1490
1491                 /* Time interval */
1492                 hellcreek_write(hellcreek,
1493                                 cur->interval & 0x0000ffff,
1494                                 TR_GCLTIL);
1495                 hellcreek_write(hellcreek,
1496                                 (cur->interval & 0xffff0000) >> 16,
1497                                 TR_GCLTIH);
1498
1499                 /* Commit entry */
1500                 data = ((i - 1) << TR_GCLCMD_GCLWRADR_SHIFT) |
1501                         (initial->gate_mask <<
1502                          TR_GCLCMD_INIT_GATE_STATES_SHIFT);
1503                 hellcreek_write(hellcreek, data, TR_GCLCMD);
1504
1505                 cur++;
1506                 next++;
1507         }
1508 }
1509
1510 static void hellcreek_set_cycle_time(struct hellcreek *hellcreek,
1511                                      const struct tc_taprio_qopt_offload *schedule)
1512 {
1513         u32 cycle_time = schedule->cycle_time;
1514
1515         hellcreek_write(hellcreek, cycle_time & 0x0000ffff, TR_CTWRL);
1516         hellcreek_write(hellcreek, (cycle_time & 0xffff0000) >> 16, TR_CTWRH);
1517 }
1518
1519 static void hellcreek_switch_schedule(struct hellcreek *hellcreek,
1520                                       ktime_t start_time)
1521 {
1522         struct timespec64 ts = ktime_to_timespec64(start_time);
1523
1524         /* Start schedule at this point of time */
1525         hellcreek_write(hellcreek, ts.tv_nsec & 0x0000ffff, TR_ESTWRL);
1526         hellcreek_write(hellcreek, (ts.tv_nsec & 0xffff0000) >> 16, TR_ESTWRH);
1527
1528         /* Arm timer, set seconds and switch schedule */
1529         hellcreek_write(hellcreek, TR_ESTCMD_ESTARM | TR_ESTCMD_ESTSWCFG |
1530                         ((ts.tv_sec & TR_ESTCMD_ESTSEC_MASK) <<
1531                          TR_ESTCMD_ESTSEC_SHIFT), TR_ESTCMD);
1532 }
1533
1534 static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port)
1535 {
1536         struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1537         s64 base_time_ns, current_ns;
1538
1539         /* The switch allows a schedule to be started only eight seconds within
1540          * the future. Therefore, check the current PTP time if the schedule is
1541          * startable or not.
1542          */
1543
1544         /* Use the "cached" time. That should be alright, as it's updated quite
1545          * frequently in the PTP code.
1546          */
1547         mutex_lock(&hellcreek->ptp_lock);
1548         current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1549         mutex_unlock(&hellcreek->ptp_lock);
1550
1551         /* Calculate difference to admin base time */
1552         base_time_ns = ktime_to_ns(hellcreek_port->current_schedule->base_time);
1553
1554         return base_time_ns - current_ns < (s64)4 * NSEC_PER_SEC;
1555 }
1556
1557 static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port)
1558 {
1559         struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1560         ktime_t base_time, current_time;
1561         s64 current_ns;
1562         u32 cycle_time;
1563
1564         /* First select port */
1565         hellcreek_select_tgd(hellcreek, port);
1566
1567         /* Forward base time into the future if needed */
1568         mutex_lock(&hellcreek->ptp_lock);
1569         current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1570         mutex_unlock(&hellcreek->ptp_lock);
1571
1572         current_time = ns_to_ktime(current_ns);
1573         base_time    = hellcreek_port->current_schedule->base_time;
1574         cycle_time   = hellcreek_port->current_schedule->cycle_time;
1575
1576         if (ktime_compare(current_time, base_time) > 0) {
1577                 s64 n;
1578
1579                 n = div64_s64(ktime_sub_ns(current_time, base_time),
1580                               cycle_time);
1581                 base_time = ktime_add_ns(base_time, (n + 1) * cycle_time);
1582         }
1583
1584         /* Set admin base time and switch schedule */
1585         hellcreek_switch_schedule(hellcreek, base_time);
1586
1587         taprio_offload_free(hellcreek_port->current_schedule);
1588         hellcreek_port->current_schedule = NULL;
1589
1590         dev_dbg(hellcreek->dev, "Armed EST timer for port %d\n",
1591                 hellcreek_port->port);
1592 }
1593
1594 static void hellcreek_check_schedule(struct work_struct *work)
1595 {
1596         struct delayed_work *dw = to_delayed_work(work);
1597         struct hellcreek_port *hellcreek_port;
1598         struct hellcreek *hellcreek;
1599         bool startable;
1600
1601         hellcreek_port = dw_to_hellcreek_port(dw);
1602         hellcreek = hellcreek_port->hellcreek;
1603
1604         mutex_lock(&hellcreek->reg_lock);
1605
1606         /* Check starting time */
1607         startable = hellcreek_schedule_startable(hellcreek,
1608                                                  hellcreek_port->port);
1609         if (startable) {
1610                 hellcreek_start_schedule(hellcreek, hellcreek_port->port);
1611                 mutex_unlock(&hellcreek->reg_lock);
1612                 return;
1613         }
1614
1615         mutex_unlock(&hellcreek->reg_lock);
1616
1617         /* Reschedule */
1618         schedule_delayed_work(&hellcreek_port->schedule_work,
1619                               HELLCREEK_SCHEDULE_PERIOD);
1620 }
1621
1622 static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port,
1623                                        struct tc_taprio_qopt_offload *taprio)
1624 {
1625         struct hellcreek *hellcreek = ds->priv;
1626         struct hellcreek_port *hellcreek_port;
1627         bool startable;
1628         u16 ctrl;
1629
1630         hellcreek_port = &hellcreek->ports[port];
1631
1632         dev_dbg(hellcreek->dev, "Configure traffic schedule on port %d\n",
1633                 port);
1634
1635         /* First cancel delayed work */
1636         cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1637
1638         mutex_lock(&hellcreek->reg_lock);
1639
1640         if (hellcreek_port->current_schedule) {
1641                 taprio_offload_free(hellcreek_port->current_schedule);
1642                 hellcreek_port->current_schedule = NULL;
1643         }
1644         hellcreek_port->current_schedule = taprio_offload_get(taprio);
1645
1646         /* Then select port */
1647         hellcreek_select_tgd(hellcreek, port);
1648
1649         /* Enable gating and keep defaults */
1650         ctrl = (0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT) | TR_TGDCTRL_GATE_EN;
1651         hellcreek_write(hellcreek, ctrl, TR_TGDCTRL);
1652
1653         /* Cancel pending schedule */
1654         hellcreek_write(hellcreek, 0x00, TR_ESTCMD);
1655
1656         /* Setup a new schedule */
1657         hellcreek_setup_gcl(hellcreek, port, hellcreek_port->current_schedule);
1658
1659         /* Configure cycle time */
1660         hellcreek_set_cycle_time(hellcreek, hellcreek_port->current_schedule);
1661
1662         /* Check starting time */
1663         startable = hellcreek_schedule_startable(hellcreek, port);
1664         if (startable) {
1665                 hellcreek_start_schedule(hellcreek, port);
1666                 mutex_unlock(&hellcreek->reg_lock);
1667                 return 0;
1668         }
1669
1670         mutex_unlock(&hellcreek->reg_lock);
1671
1672         /* Schedule periodic schedule check */
1673         schedule_delayed_work(&hellcreek_port->schedule_work,
1674                               HELLCREEK_SCHEDULE_PERIOD);
1675
1676         return 0;
1677 }
1678
1679 static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port)
1680 {
1681         struct hellcreek *hellcreek = ds->priv;
1682         struct hellcreek_port *hellcreek_port;
1683
1684         hellcreek_port = &hellcreek->ports[port];
1685
1686         dev_dbg(hellcreek->dev, "Remove traffic schedule on port %d\n", port);
1687
1688         /* First cancel delayed work */
1689         cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1690
1691         mutex_lock(&hellcreek->reg_lock);
1692
1693         if (hellcreek_port->current_schedule) {
1694                 taprio_offload_free(hellcreek_port->current_schedule);
1695                 hellcreek_port->current_schedule = NULL;
1696         }
1697
1698         /* Then select port */
1699         hellcreek_select_tgd(hellcreek, port);
1700
1701         /* Disable gating and return to regular switching flow */
1702         hellcreek_write(hellcreek, 0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT,
1703                         TR_TGDCTRL);
1704
1705         mutex_unlock(&hellcreek->reg_lock);
1706
1707         return 0;
1708 }
1709
1710 static bool hellcreek_validate_schedule(struct hellcreek *hellcreek,
1711                                         struct tc_taprio_qopt_offload *schedule)
1712 {
1713         size_t i;
1714
1715         /* Does this hellcreek version support Qbv in hardware? */
1716         if (!hellcreek->pdata->qbv_support)
1717                 return false;
1718
1719         /* cycle time can only be 32bit */
1720         if (schedule->cycle_time > (u32)-1)
1721                 return false;
1722
1723         /* cycle time extension is not supported */
1724         if (schedule->cycle_time_extension)
1725                 return false;
1726
1727         /* Only set command is supported */
1728         for (i = 0; i < schedule->num_entries; ++i)
1729                 if (schedule->entries[i].command != TC_TAPRIO_CMD_SET_GATES)
1730                         return false;
1731
1732         return true;
1733 }
1734
1735 static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port,
1736                                    enum tc_setup_type type, void *type_data)
1737 {
1738         struct tc_taprio_qopt_offload *taprio = type_data;
1739         struct hellcreek *hellcreek = ds->priv;
1740
1741         if (type != TC_SETUP_QDISC_TAPRIO)
1742                 return -EOPNOTSUPP;
1743
1744         if (!hellcreek_validate_schedule(hellcreek, taprio))
1745                 return -EOPNOTSUPP;
1746
1747         if (taprio->enable)
1748                 return hellcreek_port_set_schedule(ds, port, taprio);
1749
1750         return hellcreek_port_del_schedule(ds, port);
1751 }
1752
1753 static const struct dsa_switch_ops hellcreek_ds_ops = {
1754         .devlink_info_get      = hellcreek_devlink_info_get,
1755         .get_ethtool_stats     = hellcreek_get_ethtool_stats,
1756         .get_sset_count        = hellcreek_get_sset_count,
1757         .get_strings           = hellcreek_get_strings,
1758         .get_tag_protocol      = hellcreek_get_tag_protocol,
1759         .get_ts_info           = hellcreek_get_ts_info,
1760         .phylink_validate      = hellcreek_phylink_validate,
1761         .port_bridge_flags     = hellcreek_bridge_flags,
1762         .port_bridge_join      = hellcreek_port_bridge_join,
1763         .port_bridge_leave     = hellcreek_port_bridge_leave,
1764         .port_disable          = hellcreek_port_disable,
1765         .port_enable           = hellcreek_port_enable,
1766         .port_fdb_add          = hellcreek_fdb_add,
1767         .port_fdb_del          = hellcreek_fdb_del,
1768         .port_fdb_dump         = hellcreek_fdb_dump,
1769         .port_hwtstamp_set     = hellcreek_port_hwtstamp_set,
1770         .port_hwtstamp_get     = hellcreek_port_hwtstamp_get,
1771         .port_pre_bridge_flags = hellcreek_pre_bridge_flags,
1772         .port_prechangeupper   = hellcreek_port_prechangeupper,
1773         .port_rxtstamp         = hellcreek_port_rxtstamp,
1774         .port_setup_tc         = hellcreek_port_setup_tc,
1775         .port_stp_state_set    = hellcreek_port_stp_state_set,
1776         .port_txtstamp         = hellcreek_port_txtstamp,
1777         .port_vlan_add         = hellcreek_vlan_add,
1778         .port_vlan_del         = hellcreek_vlan_del,
1779         .port_vlan_filtering   = hellcreek_vlan_filtering,
1780         .setup                 = hellcreek_setup,
1781         .teardown              = hellcreek_teardown,
1782 };
1783
1784 static int hellcreek_probe(struct platform_device *pdev)
1785 {
1786         struct device *dev = &pdev->dev;
1787         struct hellcreek *hellcreek;
1788         struct resource *res;
1789         int ret, i;
1790
1791         hellcreek = devm_kzalloc(dev, sizeof(*hellcreek), GFP_KERNEL);
1792         if (!hellcreek)
1793                 return -ENOMEM;
1794
1795         hellcreek->vidmbrcfg = devm_kcalloc(dev, VLAN_N_VID,
1796                                             sizeof(*hellcreek->vidmbrcfg),
1797                                             GFP_KERNEL);
1798         if (!hellcreek->vidmbrcfg)
1799                 return -ENOMEM;
1800
1801         hellcreek->pdata = of_device_get_match_data(dev);
1802
1803         hellcreek->ports = devm_kcalloc(dev, hellcreek->pdata->num_ports,
1804                                         sizeof(*hellcreek->ports),
1805                                         GFP_KERNEL);
1806         if (!hellcreek->ports)
1807                 return -ENOMEM;
1808
1809         for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1810                 struct hellcreek_port *port = &hellcreek->ports[i];
1811
1812                 port->counter_values =
1813                         devm_kcalloc(dev,
1814                                      ARRAY_SIZE(hellcreek_counter),
1815                                      sizeof(*port->counter_values),
1816                                      GFP_KERNEL);
1817                 if (!port->counter_values)
1818                         return -ENOMEM;
1819
1820                 port->vlan_dev_bitmap =
1821                         devm_kcalloc(dev,
1822                                      BITS_TO_LONGS(VLAN_N_VID),
1823                                      sizeof(unsigned long),
1824                                      GFP_KERNEL);
1825                 if (!port->vlan_dev_bitmap)
1826                         return -ENOMEM;
1827
1828                 port->hellcreek = hellcreek;
1829                 port->port      = i;
1830
1831                 INIT_DELAYED_WORK(&port->schedule_work,
1832                                   hellcreek_check_schedule);
1833         }
1834
1835         mutex_init(&hellcreek->reg_lock);
1836         mutex_init(&hellcreek->vlan_lock);
1837         mutex_init(&hellcreek->ptp_lock);
1838
1839         hellcreek->dev = dev;
1840
1841         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tsn");
1842         if (!res) {
1843                 dev_err(dev, "No memory region provided!\n");
1844                 return -ENODEV;
1845         }
1846
1847         hellcreek->base = devm_ioremap_resource(dev, res);
1848         if (IS_ERR(hellcreek->base))
1849                 return PTR_ERR(hellcreek->base);
1850
1851         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ptp");
1852         if (!res) {
1853                 dev_err(dev, "No PTP memory region provided!\n");
1854                 return -ENODEV;
1855         }
1856
1857         hellcreek->ptp_base = devm_ioremap_resource(dev, res);
1858         if (IS_ERR(hellcreek->ptp_base))
1859                 return PTR_ERR(hellcreek->ptp_base);
1860
1861         ret = hellcreek_detect(hellcreek);
1862         if (ret) {
1863                 dev_err(dev, "No (known) chip found!\n");
1864                 return ret;
1865         }
1866
1867         ret = hellcreek_wait_until_ready(hellcreek);
1868         if (ret) {
1869                 dev_err(dev, "Switch didn't become ready!\n");
1870                 return ret;
1871         }
1872
1873         hellcreek_feature_detect(hellcreek);
1874
1875         hellcreek->ds = devm_kzalloc(dev, sizeof(*hellcreek->ds), GFP_KERNEL);
1876         if (!hellcreek->ds)
1877                 return -ENOMEM;
1878
1879         hellcreek->ds->dev           = dev;
1880         hellcreek->ds->priv          = hellcreek;
1881         hellcreek->ds->ops           = &hellcreek_ds_ops;
1882         hellcreek->ds->num_ports     = hellcreek->pdata->num_ports;
1883         hellcreek->ds->num_tx_queues = HELLCREEK_NUM_EGRESS_QUEUES;
1884
1885         ret = dsa_register_switch(hellcreek->ds);
1886         if (ret) {
1887                 dev_err_probe(dev, ret, "Unable to register switch\n");
1888                 return ret;
1889         }
1890
1891         ret = hellcreek_ptp_setup(hellcreek);
1892         if (ret) {
1893                 dev_err(dev, "Failed to setup PTP!\n");
1894                 goto err_ptp_setup;
1895         }
1896
1897         ret = hellcreek_hwtstamp_setup(hellcreek);
1898         if (ret) {
1899                 dev_err(dev, "Failed to setup hardware timestamping!\n");
1900                 goto err_tstamp_setup;
1901         }
1902
1903         platform_set_drvdata(pdev, hellcreek);
1904
1905         return 0;
1906
1907 err_tstamp_setup:
1908         hellcreek_ptp_free(hellcreek);
1909 err_ptp_setup:
1910         dsa_unregister_switch(hellcreek->ds);
1911
1912         return ret;
1913 }
1914
1915 static int hellcreek_remove(struct platform_device *pdev)
1916 {
1917         struct hellcreek *hellcreek = platform_get_drvdata(pdev);
1918
1919         hellcreek_hwtstamp_free(hellcreek);
1920         hellcreek_ptp_free(hellcreek);
1921         dsa_unregister_switch(hellcreek->ds);
1922         platform_set_drvdata(pdev, NULL);
1923
1924         return 0;
1925 }
1926
1927 static const struct hellcreek_platform_data de1soc_r1_pdata = {
1928         .name            = "r4c30",
1929         .num_ports       = 4,
1930         .is_100_mbits    = 1,
1931         .qbv_support     = 1,
1932         .qbv_on_cpu_port = 1,
1933         .qbu_support     = 0,
1934         .module_id       = 0x4c30,
1935 };
1936
1937 static const struct of_device_id hellcreek_of_match[] = {
1938         {
1939                 .compatible = "hirschmann,hellcreek-de1soc-r1",
1940                 .data       = &de1soc_r1_pdata,
1941         },
1942         { /* sentinel */ },
1943 };
1944 MODULE_DEVICE_TABLE(of, hellcreek_of_match);
1945
1946 static struct platform_driver hellcreek_driver = {
1947         .probe  = hellcreek_probe,
1948         .remove = hellcreek_remove,
1949         .driver = {
1950                 .name = "hellcreek",
1951                 .of_match_table = hellcreek_of_match,
1952         },
1953 };
1954 module_platform_driver(hellcreek_driver);
1955
1956 MODULE_AUTHOR("Kurt Kanzenbach <kurt@linutronix.de>");
1957 MODULE_DESCRIPTION("Hirschmann Hellcreek driver");
1958 MODULE_LICENSE("Dual MIT/GPL");