drivers/net/dsa/qca8k.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2009 Felix Fietkau <[email protected]>
   4  * Copyright (C) 2011-2012 Gabor Juhos <[email protected]>
   5  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   6  * Copyright (c) 2016 John Crispin <[email protected]>
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/phy.h>
  11 #include <linux/netdevice.h>
  12 #include <net/dsa.h>
  13 #include <linux/of_net.h>
  14 #include <linux/of_platform.h>
  15 #include <linux/if_bridge.h>
  16 #include <linux/mdio.h>
  17 #include <linux/etherdevice.h>
  18
  19 #include "qca8k.h"
  20
  21 #define MIB_DESC(_s, _o, _n)    \
  22         {                       \
  23                 .size = (_s),   \
  24                 .offset = (_o), \
  25                 .name = (_n),   \
  26         }
  27
  28 static const struct qca8k_mib_desc ar8327_mib[] = {
  29         MIB_DESC(1, 0x00, "RxBroad"),
  30         MIB_DESC(1, 0x04, "RxPause"),
  31         MIB_DESC(1, 0x08, "RxMulti"),
  32         MIB_DESC(1, 0x0c, "RxFcsErr"),
  33         MIB_DESC(1, 0x10, "RxAlignErr"),
  34         MIB_DESC(1, 0x14, "RxRunt"),
  35         MIB_DESC(1, 0x18, "RxFragment"),
  36         MIB_DESC(1, 0x1c, "Rx64Byte"),
  37         MIB_DESC(1, 0x20, "Rx128Byte"),
  38         MIB_DESC(1, 0x24, "Rx256Byte"),
  39         MIB_DESC(1, 0x28, "Rx512Byte"),
  40         MIB_DESC(1, 0x2c, "Rx1024Byte"),
  41         MIB_DESC(1, 0x30, "Rx1518Byte"),
  42         MIB_DESC(1, 0x34, "RxMaxByte"),
  43         MIB_DESC(1, 0x38, "RxTooLong"),
  44         MIB_DESC(2, 0x3c, "RxGoodByte"),
  45         MIB_DESC(2, 0x44, "RxBadByte"),
  46         MIB_DESC(1, 0x4c, "RxOverFlow"),
  47         MIB_DESC(1, 0x50, "Filtered"),
  48         MIB_DESC(1, 0x54, "TxBroad"),
  49         MIB_DESC(1, 0x58, "TxPause"),
  50         MIB_DESC(1, 0x5c, "TxMulti"),
  51         MIB_DESC(1, 0x60, "TxUnderRun"),
  52         MIB_DESC(1, 0x64, "Tx64Byte"),
  53         MIB_DESC(1, 0x68, "Tx128Byte"),
  54         MIB_DESC(1, 0x6c, "Tx256Byte"),
  55         MIB_DESC(1, 0x70, "Tx512Byte"),
  56         MIB_DESC(1, 0x74, "Tx1024Byte"),
  57         MIB_DESC(1, 0x78, "Tx1518Byte"),
  58         MIB_DESC(1, 0x7c, "TxMaxByte"),
  59         MIB_DESC(1, 0x80, "TxOverSize"),
  60         MIB_DESC(2, 0x84, "TxByte"),
  61         MIB_DESC(1, 0x8c, "TxCollision"),
  62         MIB_DESC(1, 0x90, "TxAbortCol"),
  63         MIB_DESC(1, 0x94, "TxMultiCol"),
  64         MIB_DESC(1, 0x98, "TxSingleCol"),
  65         MIB_DESC(1, 0x9c, "TxExcDefer"),
  66         MIB_DESC(1, 0xa0, "TxDefer"),
  67         MIB_DESC(1, 0xa4, "TxLateCol"),
  68 };
  69
  70 /* The 32bit switch registers are accessed indirectly. To achieve this we need
  71  * to set the page of the register. Track the last page that was set to reduce
  72  * mdio writes
  73  */
  74 static u16 qca8k_current_page = 0xffff;
  75
  76 static void
  77 qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
  78 {
  79         regaddr >>= 1;
  80         *r1 = regaddr & 0x1e;
  81
  82         regaddr >>= 5;
  83         *r2 = regaddr & 0x7;
  84
  85         regaddr >>= 3;
  86         *page = regaddr & 0x3ff;
  87 }
  88
  89 static u32
  90 qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum)
  91 {
  92         u32 val;
  93         int ret;
  94
  95         ret = bus->read(bus, phy_id, regnum);
  96         if (ret >= 0) {
  97                 val = ret;
  98                 ret = bus->read(bus, phy_id, regnum + 1);
  99                 val |= ret << 16;
 100         }
 101
 102         if (ret < 0) {
 103                 dev_err_ratelimited(&bus->dev,
 104                                     "failed to read qca8k 32bit register\n");
 105                 return ret;
 106         }
 107
 108         return val;
 109 }
 110
 111 static void
 112 qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val)
 113 {
 114         u16 lo, hi;
 115         int ret;
 116
 117         lo = val & 0xffff;
 118         hi = (u16)(val >> 16);
 119
 120         ret = bus->write(bus, phy_id, regnum, lo);
 121         if (ret >= 0)
 122                 ret = bus->write(bus, phy_id, regnum + 1, hi);
 123         if (ret < 0)
 124                 dev_err_ratelimited(&bus->dev,
 125                                     "failed to write qca8k 32bit register\n");
 126 }
 127
 128 static void
 129 qca8k_set_page(struct mii_bus *bus, u16 page)
 130 {
 131         if (page == qca8k_current_page)
 132                 return;
 133
 134         if (bus->write(bus, 0x18, 0, page) < 0)
 135                 dev_err_ratelimited(&bus->dev,
 136                                     "failed to set qca8k page\n");
 137         qca8k_current_page = page;
 138 }
 139
 140 static u32
 141 qca8k_read(struct qca8k_priv *priv, u32 reg)
 142 {
 143         u16 r1, r2, page;
 144         u32 val;
 145
 146         qca8k_split_addr(reg, &r1, &r2, &page);
 147
 148         mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
 149
 150         qca8k_set_page(priv->bus, page);
 151         val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
 152
 153         mutex_unlock(&priv->bus->mdio_lock);
 154
 155         return val;
 156 }
 157
 158 static void
 159 qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
 160 {
 161         u16 r1, r2, page;
 162
 163         qca8k_split_addr(reg, &r1, &r2, &page);
 164
 165         mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
 166
 167         qca8k_set_page(priv->bus, page);
 168         qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
 169
 170         mutex_unlock(&priv->bus->mdio_lock);
 171 }
 172
 173 static u32
 174 qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
 175 {
 176         u16 r1, r2, page;
 177         u32 ret;
 178
 179         qca8k_split_addr(reg, &r1, &r2, &page);
 180
 181         mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
 182
 183         qca8k_set_page(priv->bus, page);
 184         ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
 185         ret &= ~mask;
 186         ret |= val;
 187         qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
 188
 189         mutex_unlock(&priv->bus->mdio_lock);
 190
 191         return ret;
 192 }
 193
 194 static void
 195 qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val)
 196 {
 197         qca8k_rmw(priv, reg, 0, val);
 198 }
 199
 200 static void
 201 qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val)
 202 {
 203         qca8k_rmw(priv, reg, val, 0);
 204 }
 205
 206 static int
 207 qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
 208 {
 209         struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
 210
 211         *val = qca8k_read(priv, reg);
 212
 213         return 0;
 214 }
 215
 216 static int
 217 qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
 218 {
 219         struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
 220
 221         qca8k_write(priv, reg, val);
 222
 223         return 0;
 224 }
 225
 226 static const struct regmap_range qca8k_readable_ranges[] = {
 227         regmap_reg_range(0x0000, 0x00e4), /* Global control */
 228         regmap_reg_range(0x0100, 0x0168), /* EEE control */
 229         regmap_reg_range(0x0200, 0x0270), /* Parser control */
 230         regmap_reg_range(0x0400, 0x0454), /* ACL */
 231         regmap_reg_range(0x0600, 0x0718), /* Lookup */
 232         regmap_reg_range(0x0800, 0x0b70), /* QM */
 233         regmap_reg_range(0x0c00, 0x0c80), /* PKT */
 234         regmap_reg_range(0x0e00, 0x0e98), /* L3 */
 235         regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */
 236         regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */
 237         regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */
 238         regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */
 239         regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */
 240         regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */
 241         regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */
 242
 243 };
 244
 245 static const struct regmap_access_table qca8k_readable_table = {
 246         .yes_ranges = qca8k_readable_ranges,
 247         .n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
 248 };
 249
 250 static struct regmap_config qca8k_regmap_config = {
 251         .reg_bits = 16,
 252         .val_bits = 32,
 253         .reg_stride = 4,
 254         .max_register = 0x16ac, /* end MIB - Port6 range */
 255         .reg_read = qca8k_regmap_read,
 256         .reg_write = qca8k_regmap_write,
 257         .rd_table = &qca8k_readable_table,
 258 };
 259
 260 static int
 261 qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
 262 {
 263         unsigned long timeout;
 264
 265         timeout = jiffies + msecs_to_jiffies(20);
 266
 267         /* loop until the busy flag has cleared */
 268         do {
 269                 u32 val = qca8k_read(priv, reg);
 270                 int busy = val & mask;
 271
 272                 if (!busy)
 273                         break;
 274                 cond_resched();
 275         } while (!time_after_eq(jiffies, timeout));
 276
 277         return time_after_eq(jiffies, timeout);
 278 }
 279
 280 static void
 281 qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
 282 {
 283         u32 reg[4];
 284         int i;
 285
 286         /* load the ARL table into an array */
 287         for (i = 0; i < 4; i++)
 288                 reg[i] = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4));
 289
 290         /* vid - 83:72 */
 291         fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M;
 292         /* aging - 67:64 */
 293         fdb->aging = reg[2] & QCA8K_ATU_STATUS_M;
 294         /* portmask - 54:48 */
 295         fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M;
 296         /* mac - 47:0 */
 297         fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff;
 298         fdb->mac[1] = reg[1] & 0xff;
 299         fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff;
 300         fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff;
 301         fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff;
 302         fdb->mac[5] = reg[0] & 0xff;
 303 }
 304
 305 static void
 306 qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac,
 307                 u8 aging)
 308 {
 309         u32 reg[3] = { 0 };
 310         int i;
 311
 312         /* vid - 83:72 */
 313         reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S;
 314         /* aging - 67:64 */
 315         reg[2] |= aging & QCA8K_ATU_STATUS_M;
 316         /* portmask - 54:48 */
 317         reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S;
 318         /* mac - 47:0 */
 319         reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S;
 320         reg[1] |= mac[1];
 321         reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S;
 322         reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S;
 323         reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S;
 324         reg[0] |= mac[5];
 325
 326         /* load the array into the ARL table */
 327         for (i = 0; i < 3; i++)
 328                 qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]);
 329 }
 330
 331 static int
 332 qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
 333 {
 334         u32 reg;
 335
 336         /* Set the command and FDB index */
 337         reg = QCA8K_ATU_FUNC_BUSY;
 338         reg |= cmd;
 339         if (port >= 0) {
 340                 reg |= QCA8K_ATU_FUNC_PORT_EN;
 341                 reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S;
 342         }
 343
 344         /* Write the function register triggering the table access */
 345         qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg);
 346
 347         /* wait for completion */
 348         if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY))
 349                 return -1;
 350
 351         /* Check for table full violation when adding an entry */
 352         if (cmd == QCA8K_FDB_LOAD) {
 353                 reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC);
 354                 if (reg & QCA8K_ATU_FUNC_FULL)
 355                         return -1;
 356         }
 357
 358         return 0;
 359 }
 360
 361 static int
 362 qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port)
 363 {
 364         int ret;
 365
 366         qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging);
 367         ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port);
 368         if (ret >= 0)
 369                 qca8k_fdb_read(priv, fdb);
 370
 371         return ret;
 372 }
 373
 374 static int
 375 qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask,
 376               u16 vid, u8 aging)
 377 {
 378         int ret;
 379
 380         mutex_lock(&priv->reg_mutex);
 381         qca8k_fdb_write(priv, vid, port_mask, mac, aging);
 382         ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
 383         mutex_unlock(&priv->reg_mutex);
 384
 385         return ret;
 386 }
 387
 388 static int
 389 qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid)
 390 {
 391         int ret;
 392
 393         mutex_lock(&priv->reg_mutex);
 394         qca8k_fdb_write(priv, vid, port_mask, mac, 0);
 395         ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
 396         mutex_unlock(&priv->reg_mutex);
 397
 398         return ret;
 399 }
 400
 401 static void
 402 qca8k_fdb_flush(struct qca8k_priv *priv)
 403 {
 404         mutex_lock(&priv->reg_mutex);
 405         qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1);
 406         mutex_unlock(&priv->reg_mutex);
 407 }
 408
 409 static void
 410 qca8k_mib_init(struct qca8k_priv *priv)
 411 {
 412         mutex_lock(&priv->reg_mutex);
 413         qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY);
 414         qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
 415         qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
 416         qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
 417         mutex_unlock(&priv->reg_mutex);
 418 }
 419
 420 static int
 421 qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode)
 422 {
 423         u32 reg;
 424
 425         switch (port) {
 426         case 0:
 427                 reg = QCA8K_REG_PORT0_PAD_CTRL;
 428                 break;
 429         case 6:
 430                 reg = QCA8K_REG_PORT6_PAD_CTRL;
 431                 break;
 432         default:
 433                 pr_err("Can't set PAD_CTRL on port %d\n", port);
 434                 return -EINVAL;
 435         }
 436
 437         /* Configure a port to be directly connected to an external
 438          * PHY or MAC.
 439          */
 440         switch (mode) {
 441         case PHY_INTERFACE_MODE_RGMII:
 442                 qca8k_write(priv, reg,
 443                             QCA8K_PORT_PAD_RGMII_EN |
 444                             QCA8K_PORT_PAD_RGMII_TX_DELAY(3) |
 445                             QCA8K_PORT_PAD_RGMII_RX_DELAY(3));
 446
 447                 /* According to the datasheet, RGMII delay is enabled through
 448                  * PORT5_PAD_CTRL for all ports, rather than individual port
 449                  * registers
 450                  */
 451                 qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
 452                             QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
 453                 break;
 454         case PHY_INTERFACE_MODE_SGMII:
 455                 qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
 456                 break;
 457         default:
 458                 pr_err("xMII mode %d not supported\n", mode);
 459                 return -EINVAL;
 460         }
 461
 462         return 0;
 463 }
 464
 465 static void
 466 qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
 467 {
 468         u32 mask = QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
 469
 470         /* Port 0 and 6 have no internal PHY */
 471         if (port > 0 && port < 6)
 472                 mask |= QCA8K_PORT_STATUS_LINK_AUTO;
 473
 474         if (enable)
 475                 qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask);
 476         else
 477                 qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask);
 478 }
 479
 480 static int
 481 qca8k_setup(struct dsa_switch *ds)
 482 {
 483         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 484         int ret, i, phy_mode = -1;
 485         u32 mask;
 486
 487         /* Make sure that port 0 is the cpu port */
 488         if (!dsa_is_cpu_port(ds, 0)) {
 489                 pr_err("port 0 is not the CPU port\n");
 490                 return -EINVAL;
 491         }
 492
 493         mutex_init(&priv->reg_mutex);
 494
 495         /* Start by setting up the register mapping */
 496         priv->regmap = devm_regmap_init(ds->dev, NULL, priv,
 497                                         &qca8k_regmap_config);
 498         if (IS_ERR(priv->regmap))
 499                 pr_warn("regmap initialization failed");
 500
 501         /* Initialize CPU port pad mode (xMII type, delays...) */
 502         phy_mode = of_get_phy_mode(ds->ports[QCA8K_CPU_PORT].dn);
 503         if (phy_mode < 0) {
 504                 pr_err("Can't find phy-mode for master device\n");
 505                 return phy_mode;
 506         }
 507         ret = qca8k_set_pad_ctrl(priv, QCA8K_CPU_PORT, phy_mode);
 508         if (ret < 0)
 509                 return ret;
 510
 511         /* Enable CPU Port, force it to maximum bandwidth and full-duplex */
 512         mask = QCA8K_PORT_STATUS_SPEED_1000 | QCA8K_PORT_STATUS_TXFLOW |
 513                QCA8K_PORT_STATUS_RXFLOW | QCA8K_PORT_STATUS_DUPLEX;
 514         qca8k_write(priv, QCA8K_REG_PORT_STATUS(QCA8K_CPU_PORT), mask);
 515         qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
 516                       QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
 517         qca8k_port_set_status(priv, QCA8K_CPU_PORT, 1);
 518         priv->port_sts[QCA8K_CPU_PORT].enabled = 1;
 519
 520         /* Enable MIB counters */
 521         qca8k_mib_init(priv);
 522
 523         /* Enable QCA header mode on the cpu port */
 524         qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT),
 525                     QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
 526                     QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
 527
 528         /* Disable forwarding by default on all ports */
 529         for (i = 0; i < QCA8K_NUM_PORTS; i++)
 530                 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
 531                           QCA8K_PORT_LOOKUP_MEMBER, 0);
 532
 533         /* Disable MAC by default on all user ports */
 534         for (i = 1; i < QCA8K_NUM_PORTS; i++)
 535                 if (dsa_is_user_port(ds, i))
 536                         qca8k_port_set_status(priv, i, 0);
 537
 538         /* Forward all unknown frames to CPU port for Linux processing */
 539         qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
 540                     BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
 541                     BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
 542                     BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S |
 543                     BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S);
 544
 545         /* Setup connection between CPU port & user ports */
 546         for (i = 0; i < DSA_MAX_PORTS; i++) {
 547                 /* CPU port gets connected to all user ports of the switch */
 548                 if (dsa_is_cpu_port(ds, i)) {
 549                         qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
 550                                   QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
 551                 }
 552
 553                 /* Invividual user ports get connected to CPU port only */
 554                 if (dsa_is_user_port(ds, i)) {
 555                         int shift = 16 * (i % 2);
 556
 557                         qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
 558                                   QCA8K_PORT_LOOKUP_MEMBER,
 559                                   BIT(QCA8K_CPU_PORT));
 560
 561                         /* Enable ARP Auto-learning by default */
 562                         qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i),
 563                                       QCA8K_PORT_LOOKUP_LEARN);
 564
 565                         /* For port based vlans to work we need to set the
 566                          * default egress vid
 567                          */
 568                         qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i),
 569                                   0xffff << shift, 1 << shift);
 570                         qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i),
 571                                     QCA8K_PORT_VLAN_CVID(1) |
 572                                     QCA8K_PORT_VLAN_SVID(1));
 573                 }
 574         }
 575
 576         /* Flush the FDB table */
 577         qca8k_fdb_flush(priv);
 578
 579         return 0;
 580 }
 581
 582 static void
 583 qca8k_adjust_link(struct dsa_switch *ds, int port, struct phy_device *phy)
 584 {
 585         struct qca8k_priv *priv = ds->priv;
 586         u32 reg;
 587
 588         /* Force fixed-link setting for CPU port, skip others. */
 589         if (!phy_is_pseudo_fixed_link(phy))
 590                 return;
 591
 592         /* Set port speed */
 593         switch (phy->speed) {
 594         case 10:
 595                 reg = QCA8K_PORT_STATUS_SPEED_10;
 596                 break;
 597         case 100:
 598                 reg = QCA8K_PORT_STATUS_SPEED_100;
 599                 break;
 600         case 1000:
 601                 reg = QCA8K_PORT_STATUS_SPEED_1000;
 602                 break;
 603         default:
 604                 dev_dbg(priv->dev, "port%d link speed %dMbps not supported.\n",
 605                         port, phy->speed);
 606                 return;
 607         }
 608
 609         /* Set duplex mode */
 610         if (phy->duplex == DUPLEX_FULL)
 611                 reg |= QCA8K_PORT_STATUS_DUPLEX;
 612
 613         /* Force flow control */
 614         if (dsa_is_cpu_port(ds, port))
 615                 reg |= QCA8K_PORT_STATUS_RXFLOW | QCA8K_PORT_STATUS_TXFLOW;
 616
 617         /* Force link down before changing MAC options */
 618         qca8k_port_set_status(priv, port, 0);
 619         qca8k_write(priv, QCA8K_REG_PORT_STATUS(port), reg);
 620         qca8k_port_set_status(priv, port, 1);
 621 }
 622
 623 static int
 624 qca8k_phy_read(struct dsa_switch *ds, int phy, int regnum)
 625 {
 626         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 627
 628         return mdiobus_read(priv->bus, phy, regnum);
 629 }
 630
 631 static int
 632 qca8k_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val)
 633 {
 634         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 635
 636         return mdiobus_write(priv->bus, phy, regnum, val);
 637 }
 638
 639 static void
 640 qca8k_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *data)
 641 {
 642         int i;
 643
 644         if (stringset != ETH_SS_STATS)
 645                 return;
 646
 647         for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++)
 648                 strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
 649                         ETH_GSTRING_LEN);
 650 }
 651
 652 static void
 653 qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
 654                         uint64_t *data)
 655 {
 656         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 657         const struct qca8k_mib_desc *mib;
 658         u32 reg, i;
 659         u64 hi;
 660
 661         for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
 662                 mib = &ar8327_mib[i];
 663                 reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
 664
 665                 data[i] = qca8k_read(priv, reg);
 666                 if (mib->size == 2) {
 667                         hi = qca8k_read(priv, reg + 4);
 668                         data[i] |= hi << 32;
 669                 }
 670         }
 671 }
 672
 673 static int
 674 qca8k_get_sset_count(struct dsa_switch *ds, int port, int sset)
 675 {
 676         if (sset != ETH_SS_STATS)
 677                 return 0;
 678
 679         return ARRAY_SIZE(ar8327_mib);
 680 }
 681
 682 static int
 683 qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee)
 684 {
 685         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 686         u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port);
 687         u32 reg;
 688
 689         mutex_lock(&priv->reg_mutex);
 690         reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL);
 691         if (eee->eee_enabled)
 692                 reg |= lpi_en;
 693         else
 694                 reg &= ~lpi_en;
 695         qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg);
 696         mutex_unlock(&priv->reg_mutex);
 697
 698         return 0;
 699 }
 700
 701 static int
 702 qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
 703 {
 704         /* Nothing to do on the port's MAC */
 705         return 0;
 706 }
 707
 708 static void
 709 qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
 710 {
 711         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 712         u32 stp_state;
 713
 714         switch (state) {
 715         case BR_STATE_DISABLED:
 716                 stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
 717                 break;
 718         case BR_STATE_BLOCKING:
 719                 stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
 720                 break;
 721         case BR_STATE_LISTENING:
 722                 stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
 723                 break;
 724         case BR_STATE_LEARNING:
 725                 stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
 726                 break;
 727         case BR_STATE_FORWARDING:
 728         default:
 729                 stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
 730                 break;
 731         }
 732
 733         qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
 734                   QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
 735 }
 736
 737 static int
 738 qca8k_port_bridge_join(struct dsa_switch *ds, int port, struct net_device *br)
 739 {
 740         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 741         int port_mask = BIT(QCA8K_CPU_PORT);
 742         int i;
 743
 744         for (i = 1; i < QCA8K_NUM_PORTS; i++) {
 745                 if (dsa_to_port(ds, i)->bridge_dev != br)
 746                         continue;
 747                 /* Add this port to the portvlan mask of the other ports
 748                  * in the bridge
 749                  */
 750                 qca8k_reg_set(priv,
 751                               QCA8K_PORT_LOOKUP_CTRL(i),
 752                               BIT(port));
 753                 if (i != port)
 754                         port_mask |= BIT(i);
 755         }
 756         /* Add all other ports to this ports portvlan mask */
 757         qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
 758                   QCA8K_PORT_LOOKUP_MEMBER, port_mask);
 759
 760         return 0;
 761 }
 762
 763 static void
 764 qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
 765 {
 766         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 767         int i;
 768
 769         for (i = 1; i < QCA8K_NUM_PORTS; i++) {
 770                 if (dsa_to_port(ds, i)->bridge_dev != br)
 771                         continue;
 772                 /* Remove this port to the portvlan mask of the other ports
 773                  * in the bridge
 774                  */
 775                 qca8k_reg_clear(priv,
 776                                 QCA8K_PORT_LOOKUP_CTRL(i),
 777                                 BIT(port));
 778         }
 779
 780         /* Set the cpu port to be the only one in the portvlan mask of
 781          * this port
 782          */
 783         qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
 784                   QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT));
 785 }
 786
 787 static int
 788 qca8k_port_enable(struct dsa_switch *ds, int port,
 789                   struct phy_device *phy)
 790 {
 791         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 792
 793         qca8k_port_set_status(priv, port, 1);
 794         priv->port_sts[port].enabled = 1;
 795
 796         return 0;
 797 }
 798
 799 static void
 800 qca8k_port_disable(struct dsa_switch *ds, int port,
 801                    struct phy_device *phy)
 802 {
 803         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 804
 805         qca8k_port_set_status(priv, port, 0);
 806         priv->port_sts[port].enabled = 0;
 807 }
 808
 809 static int
 810 qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
 811                       u16 port_mask, u16 vid)
 812 {
 813         /* Set the vid to the port vlan id if no vid is set */
 814         if (!vid)
 815                 vid = 1;
 816
 817         return qca8k_fdb_add(priv, addr, port_mask, vid,
 818                              QCA8K_ATU_STATUS_STATIC);
 819 }
 820
 821 static int
 822 qca8k_port_fdb_add(struct dsa_switch *ds, int port,
 823                    const unsigned char *addr, u16 vid)
 824 {
 825         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 826         u16 port_mask = BIT(port);
 827
 828         return qca8k_port_fdb_insert(priv, addr, port_mask, vid);
 829 }
 830
 831 static int
 832 qca8k_port_fdb_del(struct dsa_switch *ds, int port,
 833                    const unsigned char *addr, u16 vid)
 834 {
 835         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 836         u16 port_mask = BIT(port);
 837
 838         if (!vid)
 839                 vid = 1;
 840
 841         return qca8k_fdb_del(priv, addr, port_mask, vid);
 842 }
 843
 844 static int
 845 qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
 846                     dsa_fdb_dump_cb_t *cb, void *data)
 847 {
 848         struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
 849         struct qca8k_fdb _fdb = { 0 };
 850         int cnt = QCA8K_NUM_FDB_RECORDS;
 851         bool is_static;
 852         int ret = 0;
 853
 854         mutex_lock(&priv->reg_mutex);
 855         while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) {
 856                 if (!_fdb.aging)
 857                         break;
 858                 is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
 859                 ret = cb(_fdb.mac, _fdb.vid, is_static, data);
 860                 if (ret)
 861                         break;
 862         }
 863         mutex_unlock(&priv->reg_mutex);
 864
 865         return 0;
 866 }
 867
 868 static enum dsa_tag_protocol
 869 qca8k_get_tag_protocol(struct dsa_switch *ds, int port)
 870 {
 871         return DSA_TAG_PROTO_QCA;
 872 }
 873
 874 static const struct dsa_switch_ops qca8k_switch_ops = {
 875         .get_tag_protocol       = qca8k_get_tag_protocol,
 876         .setup                  = qca8k_setup,
 877         .adjust_link            = qca8k_adjust_link,
 878         .get_strings            = qca8k_get_strings,
 879         .phy_read               = qca8k_phy_read,
 880         .phy_write              = qca8k_phy_write,
 881         .get_ethtool_stats      = qca8k_get_ethtool_stats,
 882         .get_sset_count         = qca8k_get_sset_count,
 883         .get_mac_eee            = qca8k_get_mac_eee,
 884         .set_mac_eee            = qca8k_set_mac_eee,
 885         .port_enable            = qca8k_port_enable,
 886         .port_disable           = qca8k_port_disable,
 887         .port_stp_state_set     = qca8k_port_stp_state_set,
 888         .port_bridge_join       = qca8k_port_bridge_join,
 889         .port_bridge_leave      = qca8k_port_bridge_leave,
 890         .port_fdb_add           = qca8k_port_fdb_add,
 891         .port_fdb_del           = qca8k_port_fdb_del,
 892         .port_fdb_dump          = qca8k_port_fdb_dump,
 893 };
 894
 895 static int
 896 qca8k_sw_probe(struct mdio_device *mdiodev)
 897 {
 898         struct qca8k_priv *priv;
 899         u32 id;
 900
 901         /* allocate the private data struct so that we can probe the switches
 902          * ID register
 903          */
 904         priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
 905         if (!priv)
 906                 return -ENOMEM;
 907
 908         priv->bus = mdiodev->bus;
 909         priv->dev = &mdiodev->dev;
 910
 911         /* read the switches ID register */
 912         id = qca8k_read(priv, QCA8K_REG_MASK_CTRL);
 913         id >>= QCA8K_MASK_CTRL_ID_S;
 914         id &= QCA8K_MASK_CTRL_ID_M;
 915         if (id != QCA8K_ID_QCA8337)
 916                 return -ENODEV;
 917
 918         priv->ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
 919         if (!priv->ds)
 920                 return -ENOMEM;
 921
 922         priv->ds->priv = priv;
 923         priv->ds->ops = &qca8k_switch_ops;
 924         mutex_init(&priv->reg_mutex);
 925         dev_set_drvdata(&mdiodev->dev, priv);
 926
 927         return dsa_register_switch(priv->ds);
 928 }
 929
 930 static void
 931 qca8k_sw_remove(struct mdio_device *mdiodev)
 932 {
 933         struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
 934         int i;
 935
 936         for (i = 0; i < QCA8K_NUM_PORTS; i++)
 937                 qca8k_port_set_status(priv, i, 0);
 938
 939         dsa_unregister_switch(priv->ds);
 940 }
 941
 942 #ifdef CONFIG_PM_SLEEP
 943 static void
 944 qca8k_set_pm(struct qca8k_priv *priv, int enable)
 945 {
 946         int i;
 947
 948         for (i = 0; i < QCA8K_NUM_PORTS; i++) {
 949                 if (!priv->port_sts[i].enabled)
 950                         continue;
 951
 952                 qca8k_port_set_status(priv, i, enable);
 953         }
 954 }
 955
 956 static int qca8k_suspend(struct device *dev)
 957 {
 958         struct platform_device *pdev = to_platform_device(dev);
 959         struct qca8k_priv *priv = platform_get_drvdata(pdev);
 960
 961         qca8k_set_pm(priv, 0);
 962
 963         return dsa_switch_suspend(priv->ds);
 964 }
 965
 966 static int qca8k_resume(struct device *dev)
 967 {
 968         struct platform_device *pdev = to_platform_device(dev);
 969         struct qca8k_priv *priv = platform_get_drvdata(pdev);
 970
 971         qca8k_set_pm(priv, 1);
 972
 973         return dsa_switch_resume(priv->ds);
 974 }
 975 #endif /* CONFIG_PM_SLEEP */
 976
 977 static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
 978                          qca8k_suspend, qca8k_resume);
 979
 980 static const struct of_device_id qca8k_of_match[] = {
 981         { .compatible = "qca,qca8334" },
 982         { .compatible = "qca,qca8337" },
 983         { /* sentinel */ },
 984 };
 985
 986 static struct mdio_driver qca8kmdio_driver = {
 987         .probe  = qca8k_sw_probe,
 988         .remove = qca8k_sw_remove,
 989         .mdiodrv.driver = {
 990                 .name = "qca8k",
 991                 .of_match_table = qca8k_of_match,
 992                 .pm = &qca8k_pm_ops,
 993         },
 994 };
 995
 996 mdio_module_driver(qca8kmdio_driver);
 997
 998 MODULE_AUTHOR("Mathieu Olivari, John Crispin <[email protected]>");
 999 MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");
1000 MODULE_LICENSE("GPL v2");
1001 MODULE_ALIAS("platform:qca8k");