1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name> 4 * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org> 5 * Copyright (c) 2015, 2019, The Linux Foundation. All rights reserved. 6 * Copyright (c) 2016 John Crispin <john@phrozen.org> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/phy.h> 11 #include <linux/netdevice.h> 12 #include <linux/bitfield.h> 13 #include <linux/regmap.h> 14 #include <net/dsa.h> 15 #include <linux/of_net.h> 16 #include <linux/of_mdio.h> 17 #include <linux/of_platform.h> 18 #include <linux/mdio.h> 19 #include <linux/phylink.h> 20 #include <linux/gpio/consumer.h> 21 #include <linux/etherdevice.h> 22 #include <linux/dsa/tag_qca.h> 23 24 #include "qca8k.h" 25 #include "qca8k_leds.h" 26 27 static void 28 qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page) 29 { 30 regaddr >>= 1; 31 *r1 = regaddr & 0x1e; 32 33 regaddr >>= 5; 34 *r2 = regaddr & 0x7; 35 36 regaddr >>= 3; 37 *page = regaddr & 0x3ff; 38 } 39 40 static int 41 qca8k_mii_write_lo(struct mii_bus *bus, int phy_id, u32 regnum, u32 val) 42 { 43 int ret; 44 u16 lo; 45 46 lo = val & 0xffff; 47 ret = bus->write(bus, phy_id, regnum, lo); 48 if (ret < 0) 49 dev_err_ratelimited(&bus->dev, 50 "failed to write qca8k 32bit lo register\n"); 51 52 return ret; 53 } 54 55 static int 56 qca8k_mii_write_hi(struct mii_bus *bus, int phy_id, u32 regnum, u32 val) 57 { 58 int ret; 59 u16 hi; 60 61 hi = (u16)(val >> 16); 62 ret = bus->write(bus, phy_id, regnum, hi); 63 if (ret < 0) 64 dev_err_ratelimited(&bus->dev, 65 "failed to write qca8k 32bit hi register\n"); 66 67 return ret; 68 } 69 70 static int 71 qca8k_mii_read_lo(struct mii_bus *bus, int phy_id, u32 regnum, u32 *val) 72 { 73 int ret; 74 75 ret = bus->read(bus, phy_id, regnum); 76 if (ret < 0) 77 goto err; 78 79 *val = ret & 0xffff; 80 return 0; 81 82 err: 83 dev_err_ratelimited(&bus->dev, 84 "failed to read qca8k 32bit lo register\n"); 85 *val = 0; 86 87 return ret; 88 } 89 90 static int 91 qca8k_mii_read_hi(struct mii_bus *bus, int phy_id, u32 regnum, u32 *val) 92 { 93 int ret; 94 95 ret = bus->read(bus, phy_id, regnum); 96 if (ret < 0) 97 goto err; 98 99 *val = ret << 16; 100 return 0; 101 102 err: 103 dev_err_ratelimited(&bus->dev, 104 "failed to read qca8k 32bit hi register\n"); 105 *val = 0; 106 107 return ret; 108 } 109 110 static int 111 qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum, u32 *val) 112 { 113 u32 hi, lo; 114 int ret; 115 116 *val = 0; 117 118 ret = qca8k_mii_read_lo(bus, phy_id, regnum, &lo); 119 if (ret < 0) 120 goto err; 121 122 ret = qca8k_mii_read_hi(bus, phy_id, regnum + 1, &hi); 123 if (ret < 0) 124 goto err; 125 126 *val = lo | hi; 127 128 err: 129 return ret; 130 } 131 132 static void 133 qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val) 134 { 135 if (qca8k_mii_write_lo(bus, phy_id, regnum, val) < 0) 136 return; 137 138 qca8k_mii_write_hi(bus, phy_id, regnum + 1, val); 139 } 140 141 static int 142 qca8k_set_page(struct qca8k_priv *priv, u16 page) 143 { 144 u16 *cached_page = &priv->mdio_cache.page; 145 struct mii_bus *bus = priv->bus; 146 int ret; 147 148 if (page == *cached_page) 149 return 0; 150 151 ret = bus->write(bus, 0x18, 0, page); 152 if (ret < 0) { 153 dev_err_ratelimited(&bus->dev, 154 "failed to set qca8k page\n"); 155 return ret; 156 } 157 158 *cached_page = page; 159 usleep_range(1000, 2000); 160 return 0; 161 } 162 163 static void qca8k_rw_reg_ack_handler(struct dsa_switch *ds, struct sk_buff *skb) 164 { 165 struct qca8k_mgmt_eth_data *mgmt_eth_data; 166 struct qca8k_priv *priv = ds->priv; 167 struct qca_mgmt_ethhdr *mgmt_ethhdr; 168 u32 command; 169 u8 len, cmd; 170 int i; 171 172 mgmt_ethhdr = (struct qca_mgmt_ethhdr *)skb_mac_header(skb); 173 mgmt_eth_data = &priv->mgmt_eth_data; 174 175 command = get_unaligned_le32(&mgmt_ethhdr->command); 176 cmd = FIELD_GET(QCA_HDR_MGMT_CMD, command); 177 178 len = FIELD_GET(QCA_HDR_MGMT_LENGTH, command); 179 /* Special case for len of 15 as this is the max value for len and needs to 180 * be increased before converting it from word to dword. 181 */ 182 if (len == 15) 183 len++; 184 185 /* We can ignore odd value, we always round up them in the alloc function. */ 186 len *= sizeof(u16); 187 188 /* Make sure the seq match the requested packet */ 189 if (get_unaligned_le32(&mgmt_ethhdr->seq) == mgmt_eth_data->seq) 190 mgmt_eth_data->ack = true; 191 192 if (cmd == MDIO_READ) { 193 u32 *val = mgmt_eth_data->data; 194 195 *val = get_unaligned_le32(&mgmt_ethhdr->mdio_data); 196 197 /* Get the rest of the 12 byte of data. 198 * The read/write function will extract the requested data. 199 */ 200 if (len > QCA_HDR_MGMT_DATA1_LEN) { 201 __le32 *data2 = (__le32 *)skb->data; 202 int data_len = min_t(int, QCA_HDR_MGMT_DATA2_LEN, 203 len - QCA_HDR_MGMT_DATA1_LEN); 204 205 val++; 206 207 for (i = sizeof(u32); i <= data_len; i += sizeof(u32)) { 208 *val = get_unaligned_le32(data2); 209 val++; 210 data2++; 211 } 212 } 213 } 214 215 complete(&mgmt_eth_data->rw_done); 216 } 217 218 static struct sk_buff *qca8k_alloc_mdio_header(enum mdio_cmd cmd, u32 reg, u32 *val, 219 int priority, unsigned int len) 220 { 221 struct qca_mgmt_ethhdr *mgmt_ethhdr; 222 unsigned int real_len; 223 struct sk_buff *skb; 224 __le32 *data2; 225 u32 command; 226 u16 hdr; 227 int i; 228 229 skb = dev_alloc_skb(QCA_HDR_MGMT_PKT_LEN); 230 if (!skb) 231 return NULL; 232 233 /* Hdr mgmt length value is in step of word size. 234 * As an example to process 4 byte of data the correct length to set is 2. 235 * To process 8 byte 4, 12 byte 6, 16 byte 8... 236 * 237 * Odd values will always return the next size on the ack packet. 238 * (length of 3 (6 byte) will always return 8 bytes of data) 239 * 240 * This means that a value of 15 (0xf) actually means reading/writing 32 bytes 241 * of data. 242 * 243 * To correctly calculate the length we devide the requested len by word and 244 * round up. 245 * On the ack function we can skip the odd check as we already handle the 246 * case here. 247 */ 248 real_len = DIV_ROUND_UP(len, sizeof(u16)); 249 250 /* We check if the result len is odd and we round up another time to 251 * the next size. (length of 3 will be increased to 4 as switch will always 252 * return 8 bytes) 253 */ 254 if (real_len % sizeof(u16) != 0) 255 real_len++; 256 257 /* Max reg value is 0xf(15) but switch will always return the next size (32 byte) */ 258 if (real_len == 16) 259 real_len--; 260 261 skb_reset_mac_header(skb); 262 skb_set_network_header(skb, skb->len); 263 264 mgmt_ethhdr = skb_push(skb, QCA_HDR_MGMT_HEADER_LEN + QCA_HDR_LEN); 265 266 hdr = FIELD_PREP(QCA_HDR_XMIT_VERSION, QCA_HDR_VERSION); 267 hdr |= FIELD_PREP(QCA_HDR_XMIT_PRIORITY, priority); 268 hdr |= QCA_HDR_XMIT_FROM_CPU; 269 hdr |= FIELD_PREP(QCA_HDR_XMIT_DP_BIT, BIT(0)); 270 hdr |= FIELD_PREP(QCA_HDR_XMIT_CONTROL, QCA_HDR_XMIT_TYPE_RW_REG); 271 272 command = FIELD_PREP(QCA_HDR_MGMT_ADDR, reg); 273 command |= FIELD_PREP(QCA_HDR_MGMT_LENGTH, real_len); 274 command |= FIELD_PREP(QCA_HDR_MGMT_CMD, cmd); 275 command |= FIELD_PREP(QCA_HDR_MGMT_CHECK_CODE, 276 QCA_HDR_MGMT_CHECK_CODE_VAL); 277 278 put_unaligned_le32(command, &mgmt_ethhdr->command); 279 280 if (cmd == MDIO_WRITE) 281 put_unaligned_le32(*val, &mgmt_ethhdr->mdio_data); 282 283 mgmt_ethhdr->hdr = htons(hdr); 284 285 data2 = skb_put_zero(skb, QCA_HDR_MGMT_DATA2_LEN + QCA_HDR_MGMT_PADDING_LEN); 286 if (cmd == MDIO_WRITE && len > QCA_HDR_MGMT_DATA1_LEN) { 287 int data_len = min_t(int, QCA_HDR_MGMT_DATA2_LEN, 288 len - QCA_HDR_MGMT_DATA1_LEN); 289 290 val++; 291 292 for (i = sizeof(u32); i <= data_len; i += sizeof(u32)) { 293 put_unaligned_le32(*val, data2); 294 data2++; 295 val++; 296 } 297 } 298 299 return skb; 300 } 301 302 static void qca8k_mdio_header_fill_seq_num(struct sk_buff *skb, u32 seq_num) 303 { 304 struct qca_mgmt_ethhdr *mgmt_ethhdr; 305 u32 seq; 306 307 seq = FIELD_PREP(QCA_HDR_MGMT_SEQ_NUM, seq_num); 308 mgmt_ethhdr = (struct qca_mgmt_ethhdr *)skb->data; 309 put_unaligned_le32(seq, &mgmt_ethhdr->seq); 310 } 311 312 static int qca8k_read_eth(struct qca8k_priv *priv, u32 reg, u32 *val, int len) 313 { 314 struct qca8k_mgmt_eth_data *mgmt_eth_data = &priv->mgmt_eth_data; 315 struct sk_buff *skb; 316 bool ack; 317 int ret; 318 319 skb = qca8k_alloc_mdio_header(MDIO_READ, reg, NULL, 320 QCA8K_ETHERNET_MDIO_PRIORITY, len); 321 if (!skb) 322 return -ENOMEM; 323 324 mutex_lock(&mgmt_eth_data->mutex); 325 326 /* Check mgmt_master if is operational */ 327 if (!priv->mgmt_master) { 328 kfree_skb(skb); 329 mutex_unlock(&mgmt_eth_data->mutex); 330 return -EINVAL; 331 } 332 333 skb->dev = priv->mgmt_master; 334 335 reinit_completion(&mgmt_eth_data->rw_done); 336 337 /* Increment seq_num and set it in the mdio pkt */ 338 mgmt_eth_data->seq++; 339 qca8k_mdio_header_fill_seq_num(skb, mgmt_eth_data->seq); 340 mgmt_eth_data->ack = false; 341 342 dev_queue_xmit(skb); 343 344 ret = wait_for_completion_timeout(&mgmt_eth_data->rw_done, 345 msecs_to_jiffies(QCA8K_ETHERNET_TIMEOUT)); 346 347 *val = mgmt_eth_data->data[0]; 348 if (len > QCA_HDR_MGMT_DATA1_LEN) 349 memcpy(val + 1, mgmt_eth_data->data + 1, len - QCA_HDR_MGMT_DATA1_LEN); 350 351 ack = mgmt_eth_data->ack; 352 353 mutex_unlock(&mgmt_eth_data->mutex); 354 355 if (ret <= 0) 356 return -ETIMEDOUT; 357 358 if (!ack) 359 return -EINVAL; 360 361 return 0; 362 } 363 364 static int qca8k_write_eth(struct qca8k_priv *priv, u32 reg, u32 *val, int len) 365 { 366 struct qca8k_mgmt_eth_data *mgmt_eth_data = &priv->mgmt_eth_data; 367 struct sk_buff *skb; 368 bool ack; 369 int ret; 370 371 skb = qca8k_alloc_mdio_header(MDIO_WRITE, reg, val, 372 QCA8K_ETHERNET_MDIO_PRIORITY, len); 373 if (!skb) 374 return -ENOMEM; 375 376 mutex_lock(&mgmt_eth_data->mutex); 377 378 /* Check mgmt_master if is operational */ 379 if (!priv->mgmt_master) { 380 kfree_skb(skb); 381 mutex_unlock(&mgmt_eth_data->mutex); 382 return -EINVAL; 383 } 384 385 skb->dev = priv->mgmt_master; 386 387 reinit_completion(&mgmt_eth_data->rw_done); 388 389 /* Increment seq_num and set it in the mdio pkt */ 390 mgmt_eth_data->seq++; 391 qca8k_mdio_header_fill_seq_num(skb, mgmt_eth_data->seq); 392 mgmt_eth_data->ack = false; 393 394 dev_queue_xmit(skb); 395 396 ret = wait_for_completion_timeout(&mgmt_eth_data->rw_done, 397 msecs_to_jiffies(QCA8K_ETHERNET_TIMEOUT)); 398 399 ack = mgmt_eth_data->ack; 400 401 mutex_unlock(&mgmt_eth_data->mutex); 402 403 if (ret <= 0) 404 return -ETIMEDOUT; 405 406 if (!ack) 407 return -EINVAL; 408 409 return 0; 410 } 411 412 static int 413 qca8k_regmap_update_bits_eth(struct qca8k_priv *priv, u32 reg, u32 mask, u32 write_val) 414 { 415 u32 val = 0; 416 int ret; 417 418 ret = qca8k_read_eth(priv, reg, &val, sizeof(val)); 419 if (ret) 420 return ret; 421 422 val &= ~mask; 423 val |= write_val; 424 425 return qca8k_write_eth(priv, reg, &val, sizeof(val)); 426 } 427 428 static int 429 qca8k_read_mii(struct qca8k_priv *priv, uint32_t reg, uint32_t *val) 430 { 431 struct mii_bus *bus = priv->bus; 432 u16 r1, r2, page; 433 int ret; 434 435 qca8k_split_addr(reg, &r1, &r2, &page); 436 437 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); 438 439 ret = qca8k_set_page(priv, page); 440 if (ret < 0) 441 goto exit; 442 443 ret = qca8k_mii_read32(bus, 0x10 | r2, r1, val); 444 445 exit: 446 mutex_unlock(&bus->mdio_lock); 447 return ret; 448 } 449 450 static int 451 qca8k_write_mii(struct qca8k_priv *priv, uint32_t reg, uint32_t val) 452 { 453 struct mii_bus *bus = priv->bus; 454 u16 r1, r2, page; 455 int ret; 456 457 qca8k_split_addr(reg, &r1, &r2, &page); 458 459 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); 460 461 ret = qca8k_set_page(priv, page); 462 if (ret < 0) 463 goto exit; 464 465 qca8k_mii_write32(bus, 0x10 | r2, r1, val); 466 467 exit: 468 mutex_unlock(&bus->mdio_lock); 469 return ret; 470 } 471 472 static int 473 qca8k_regmap_update_bits_mii(struct qca8k_priv *priv, uint32_t reg, 474 uint32_t mask, uint32_t write_val) 475 { 476 struct mii_bus *bus = priv->bus; 477 u16 r1, r2, page; 478 u32 val; 479 int ret; 480 481 qca8k_split_addr(reg, &r1, &r2, &page); 482 483 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); 484 485 ret = qca8k_set_page(priv, page); 486 if (ret < 0) 487 goto exit; 488 489 ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val); 490 if (ret < 0) 491 goto exit; 492 493 val &= ~mask; 494 val |= write_val; 495 qca8k_mii_write32(bus, 0x10 | r2, r1, val); 496 497 exit: 498 mutex_unlock(&bus->mdio_lock); 499 500 return ret; 501 } 502 503 static int 504 qca8k_bulk_read(void *ctx, const void *reg_buf, size_t reg_len, 505 void *val_buf, size_t val_len) 506 { 507 int i, count = val_len / sizeof(u32), ret; 508 u32 reg = *(u32 *)reg_buf & U16_MAX; 509 struct qca8k_priv *priv = ctx; 510 511 if (priv->mgmt_master && 512 !qca8k_read_eth(priv, reg, val_buf, val_len)) 513 return 0; 514 515 /* loop count times and increment reg of 4 */ 516 for (i = 0; i < count; i++, reg += sizeof(u32)) { 517 ret = qca8k_read_mii(priv, reg, val_buf + i); 518 if (ret < 0) 519 return ret; 520 } 521 522 return 0; 523 } 524 525 static int 526 qca8k_bulk_gather_write(void *ctx, const void *reg_buf, size_t reg_len, 527 const void *val_buf, size_t val_len) 528 { 529 int i, count = val_len / sizeof(u32), ret; 530 u32 reg = *(u32 *)reg_buf & U16_MAX; 531 struct qca8k_priv *priv = ctx; 532 u32 *val = (u32 *)val_buf; 533 534 if (priv->mgmt_master && 535 !qca8k_write_eth(priv, reg, val, val_len)) 536 return 0; 537 538 /* loop count times, increment reg of 4 and increment val ptr to 539 * the next value 540 */ 541 for (i = 0; i < count; i++, reg += sizeof(u32), val++) { 542 ret = qca8k_write_mii(priv, reg, *val); 543 if (ret < 0) 544 return ret; 545 } 546 547 return 0; 548 } 549 550 static int 551 qca8k_bulk_write(void *ctx, const void *data, size_t bytes) 552 { 553 return qca8k_bulk_gather_write(ctx, data, sizeof(u16), data + sizeof(u16), 554 bytes - sizeof(u16)); 555 } 556 557 static int 558 qca8k_regmap_update_bits(void *ctx, uint32_t reg, uint32_t mask, uint32_t write_val) 559 { 560 struct qca8k_priv *priv = ctx; 561 562 if (!qca8k_regmap_update_bits_eth(priv, reg, mask, write_val)) 563 return 0; 564 565 return qca8k_regmap_update_bits_mii(priv, reg, mask, write_val); 566 } 567 568 static struct regmap_config qca8k_regmap_config = { 569 .reg_bits = 16, 570 .val_bits = 32, 571 .reg_stride = 4, 572 .max_register = 0x16ac, /* end MIB - Port6 range */ 573 .read = qca8k_bulk_read, 574 .write = qca8k_bulk_write, 575 .reg_update_bits = qca8k_regmap_update_bits, 576 .rd_table = &qca8k_readable_table, 577 .disable_locking = true, /* Locking is handled by qca8k read/write */ 578 .cache_type = REGCACHE_NONE, /* Explicitly disable CACHE */ 579 .max_raw_read = 32, /* mgmt eth can read up to 8 registers at time */ 580 /* ATU regs suffer from a bug where some data are not correctly 581 * written. Disable bulk write to correctly write ATU entry. 582 */ 583 .use_single_write = true, 584 }; 585 586 static int 587 qca8k_phy_eth_busy_wait(struct qca8k_mgmt_eth_data *mgmt_eth_data, 588 struct sk_buff *read_skb, u32 *val) 589 { 590 struct sk_buff *skb = skb_copy(read_skb, GFP_KERNEL); 591 bool ack; 592 int ret; 593 594 if (!skb) 595 return -ENOMEM; 596 597 reinit_completion(&mgmt_eth_data->rw_done); 598 599 /* Increment seq_num and set it in the copy pkt */ 600 mgmt_eth_data->seq++; 601 qca8k_mdio_header_fill_seq_num(skb, mgmt_eth_data->seq); 602 mgmt_eth_data->ack = false; 603 604 dev_queue_xmit(skb); 605 606 ret = wait_for_completion_timeout(&mgmt_eth_data->rw_done, 607 QCA8K_ETHERNET_TIMEOUT); 608 609 ack = mgmt_eth_data->ack; 610 611 if (ret <= 0) 612 return -ETIMEDOUT; 613 614 if (!ack) 615 return -EINVAL; 616 617 *val = mgmt_eth_data->data[0]; 618 619 return 0; 620 } 621 622 static int 623 qca8k_phy_eth_command(struct qca8k_priv *priv, bool read, int phy, 624 int regnum, u16 data) 625 { 626 struct sk_buff *write_skb, *clear_skb, *read_skb; 627 struct qca8k_mgmt_eth_data *mgmt_eth_data; 628 u32 write_val, clear_val = 0, val; 629 struct net_device *mgmt_master; 630 int ret, ret1; 631 bool ack; 632 633 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG) 634 return -EINVAL; 635 636 mgmt_eth_data = &priv->mgmt_eth_data; 637 638 write_val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN | 639 QCA8K_MDIO_MASTER_PHY_ADDR(phy) | 640 QCA8K_MDIO_MASTER_REG_ADDR(regnum); 641 642 if (read) { 643 write_val |= QCA8K_MDIO_MASTER_READ; 644 } else { 645 write_val |= QCA8K_MDIO_MASTER_WRITE; 646 write_val |= QCA8K_MDIO_MASTER_DATA(data); 647 } 648 649 /* Prealloc all the needed skb before the lock */ 650 write_skb = qca8k_alloc_mdio_header(MDIO_WRITE, QCA8K_MDIO_MASTER_CTRL, &write_val, 651 QCA8K_ETHERNET_PHY_PRIORITY, sizeof(write_val)); 652 if (!write_skb) 653 return -ENOMEM; 654 655 clear_skb = qca8k_alloc_mdio_header(MDIO_WRITE, QCA8K_MDIO_MASTER_CTRL, &clear_val, 656 QCA8K_ETHERNET_PHY_PRIORITY, sizeof(clear_val)); 657 if (!clear_skb) { 658 ret = -ENOMEM; 659 goto err_clear_skb; 660 } 661 662 read_skb = qca8k_alloc_mdio_header(MDIO_READ, QCA8K_MDIO_MASTER_CTRL, &clear_val, 663 QCA8K_ETHERNET_PHY_PRIORITY, sizeof(clear_val)); 664 if (!read_skb) { 665 ret = -ENOMEM; 666 goto err_read_skb; 667 } 668 669 /* Actually start the request: 670 * 1. Send mdio master packet 671 * 2. Busy Wait for mdio master command 672 * 3. Get the data if we are reading 673 * 4. Reset the mdio master (even with error) 674 */ 675 mutex_lock(&mgmt_eth_data->mutex); 676 677 /* Check if mgmt_master is operational */ 678 mgmt_master = priv->mgmt_master; 679 if (!mgmt_master) { 680 mutex_unlock(&mgmt_eth_data->mutex); 681 ret = -EINVAL; 682 goto err_mgmt_master; 683 } 684 685 read_skb->dev = mgmt_master; 686 clear_skb->dev = mgmt_master; 687 write_skb->dev = mgmt_master; 688 689 reinit_completion(&mgmt_eth_data->rw_done); 690 691 /* Increment seq_num and set it in the write pkt */ 692 mgmt_eth_data->seq++; 693 qca8k_mdio_header_fill_seq_num(write_skb, mgmt_eth_data->seq); 694 mgmt_eth_data->ack = false; 695 696 dev_queue_xmit(write_skb); 697 698 ret = wait_for_completion_timeout(&mgmt_eth_data->rw_done, 699 QCA8K_ETHERNET_TIMEOUT); 700 701 ack = mgmt_eth_data->ack; 702 703 if (ret <= 0) { 704 ret = -ETIMEDOUT; 705 kfree_skb(read_skb); 706 goto exit; 707 } 708 709 if (!ack) { 710 ret = -EINVAL; 711 kfree_skb(read_skb); 712 goto exit; 713 } 714 715 ret = read_poll_timeout(qca8k_phy_eth_busy_wait, ret1, 716 !(val & QCA8K_MDIO_MASTER_BUSY), 0, 717 QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false, 718 mgmt_eth_data, read_skb, &val); 719 720 if (ret < 0 && ret1 < 0) { 721 ret = ret1; 722 goto exit; 723 } 724 725 if (read) { 726 reinit_completion(&mgmt_eth_data->rw_done); 727 728 /* Increment seq_num and set it in the read pkt */ 729 mgmt_eth_data->seq++; 730 qca8k_mdio_header_fill_seq_num(read_skb, mgmt_eth_data->seq); 731 mgmt_eth_data->ack = false; 732 733 dev_queue_xmit(read_skb); 734 735 ret = wait_for_completion_timeout(&mgmt_eth_data->rw_done, 736 QCA8K_ETHERNET_TIMEOUT); 737 738 ack = mgmt_eth_data->ack; 739 740 if (ret <= 0) { 741 ret = -ETIMEDOUT; 742 goto exit; 743 } 744 745 if (!ack) { 746 ret = -EINVAL; 747 goto exit; 748 } 749 750 ret = mgmt_eth_data->data[0] & QCA8K_MDIO_MASTER_DATA_MASK; 751 } else { 752 kfree_skb(read_skb); 753 } 754 exit: 755 reinit_completion(&mgmt_eth_data->rw_done); 756 757 /* Increment seq_num and set it in the clear pkt */ 758 mgmt_eth_data->seq++; 759 qca8k_mdio_header_fill_seq_num(clear_skb, mgmt_eth_data->seq); 760 mgmt_eth_data->ack = false; 761 762 dev_queue_xmit(clear_skb); 763 764 wait_for_completion_timeout(&mgmt_eth_data->rw_done, 765 QCA8K_ETHERNET_TIMEOUT); 766 767 mutex_unlock(&mgmt_eth_data->mutex); 768 769 return ret; 770 771 /* Error handling before lock */ 772 err_mgmt_master: 773 kfree_skb(read_skb); 774 err_read_skb: 775 kfree_skb(clear_skb); 776 err_clear_skb: 777 kfree_skb(write_skb); 778 779 return ret; 780 } 781 782 static int 783 qca8k_mdio_busy_wait(struct mii_bus *bus, u32 reg, u32 mask) 784 { 785 u16 r1, r2, page; 786 u32 val; 787 int ret, ret1; 788 789 qca8k_split_addr(reg, &r1, &r2, &page); 790 791 ret = read_poll_timeout(qca8k_mii_read_hi, ret1, !(val & mask), 0, 792 QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false, 793 bus, 0x10 | r2, r1 + 1, &val); 794 795 /* Check if qca8k_read has failed for a different reason 796 * before returnting -ETIMEDOUT 797 */ 798 if (ret < 0 && ret1 < 0) 799 return ret1; 800 801 return ret; 802 } 803 804 static int 805 qca8k_mdio_write(struct qca8k_priv *priv, int phy, int regnum, u16 data) 806 { 807 struct mii_bus *bus = priv->bus; 808 u16 r1, r2, page; 809 u32 val; 810 int ret; 811 812 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG) 813 return -EINVAL; 814 815 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN | 816 QCA8K_MDIO_MASTER_WRITE | QCA8K_MDIO_MASTER_PHY_ADDR(phy) | 817 QCA8K_MDIO_MASTER_REG_ADDR(regnum) | 818 QCA8K_MDIO_MASTER_DATA(data); 819 820 qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page); 821 822 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); 823 824 ret = qca8k_set_page(priv, page); 825 if (ret) 826 goto exit; 827 828 qca8k_mii_write32(bus, 0x10 | r2, r1, val); 829 830 ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL, 831 QCA8K_MDIO_MASTER_BUSY); 832 833 exit: 834 /* even if the busy_wait timeouts try to clear the MASTER_EN */ 835 qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0); 836 837 mutex_unlock(&bus->mdio_lock); 838 839 return ret; 840 } 841 842 static int 843 qca8k_mdio_read(struct qca8k_priv *priv, int phy, int regnum) 844 { 845 struct mii_bus *bus = priv->bus; 846 u16 r1, r2, page; 847 u32 val; 848 int ret; 849 850 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG) 851 return -EINVAL; 852 853 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN | 854 QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) | 855 QCA8K_MDIO_MASTER_REG_ADDR(regnum); 856 857 qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page); 858 859 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); 860 861 ret = qca8k_set_page(priv, page); 862 if (ret) 863 goto exit; 864 865 qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, val); 866 867 ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL, 868 QCA8K_MDIO_MASTER_BUSY); 869 if (ret) 870 goto exit; 871 872 ret = qca8k_mii_read_lo(bus, 0x10 | r2, r1, &val); 873 874 exit: 875 /* even if the busy_wait timeouts try to clear the MASTER_EN */ 876 qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0); 877 878 mutex_unlock(&bus->mdio_lock); 879 880 if (ret >= 0) 881 ret = val & QCA8K_MDIO_MASTER_DATA_MASK; 882 883 return ret; 884 } 885 886 static int 887 qca8k_internal_mdio_write(struct mii_bus *slave_bus, int phy, int regnum, u16 data) 888 { 889 struct qca8k_priv *priv = slave_bus->priv; 890 int ret; 891 892 /* Use mdio Ethernet when available, fallback to legacy one on error */ 893 ret = qca8k_phy_eth_command(priv, false, phy, regnum, data); 894 if (!ret) 895 return 0; 896 897 return qca8k_mdio_write(priv, phy, regnum, data); 898 } 899 900 static int 901 qca8k_internal_mdio_read(struct mii_bus *slave_bus, int phy, int regnum) 902 { 903 struct qca8k_priv *priv = slave_bus->priv; 904 int ret; 905 906 /* Use mdio Ethernet when available, fallback to legacy one on error */ 907 ret = qca8k_phy_eth_command(priv, true, phy, regnum, 0); 908 if (ret >= 0) 909 return ret; 910 911 ret = qca8k_mdio_read(priv, phy, regnum); 912 913 if (ret < 0) 914 return 0xffff; 915 916 return ret; 917 } 918 919 static int 920 qca8k_legacy_mdio_write(struct mii_bus *slave_bus, int port, int regnum, u16 data) 921 { 922 port = qca8k_port_to_phy(port) % PHY_MAX_ADDR; 923 924 return qca8k_internal_mdio_write(slave_bus, port, regnum, data); 925 } 926 927 static int 928 qca8k_legacy_mdio_read(struct mii_bus *slave_bus, int port, int regnum) 929 { 930 port = qca8k_port_to_phy(port) % PHY_MAX_ADDR; 931 932 return qca8k_internal_mdio_read(slave_bus, port, regnum); 933 } 934 935 static int 936 qca8k_mdio_register(struct qca8k_priv *priv) 937 { 938 struct dsa_switch *ds = priv->ds; 939 struct device_node *mdio; 940 struct mii_bus *bus; 941 942 bus = devm_mdiobus_alloc(ds->dev); 943 if (!bus) 944 return -ENOMEM; 945 946 bus->priv = (void *)priv; 947 snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d.%d", 948 ds->dst->index, ds->index); 949 bus->parent = ds->dev; 950 bus->phy_mask = ~ds->phys_mii_mask; 951 ds->slave_mii_bus = bus; 952 953 /* Check if the devicetree declare the port:phy mapping */ 954 mdio = of_get_child_by_name(priv->dev->of_node, "mdio"); 955 if (of_device_is_available(mdio)) { 956 bus->name = "qca8k slave mii"; 957 bus->read = qca8k_internal_mdio_read; 958 bus->write = qca8k_internal_mdio_write; 959 return devm_of_mdiobus_register(priv->dev, bus, mdio); 960 } 961 962 /* If a mapping can't be found the legacy mapping is used, 963 * using the qca8k_port_to_phy function 964 */ 965 bus->name = "qca8k-legacy slave mii"; 966 bus->read = qca8k_legacy_mdio_read; 967 bus->write = qca8k_legacy_mdio_write; 968 return devm_mdiobus_register(priv->dev, bus); 969 } 970 971 static int 972 qca8k_setup_mdio_bus(struct qca8k_priv *priv) 973 { 974 u32 internal_mdio_mask = 0, external_mdio_mask = 0, reg; 975 struct device_node *ports, *port; 976 phy_interface_t mode; 977 int err; 978 979 ports = of_get_child_by_name(priv->dev->of_node, "ports"); 980 if (!ports) 981 ports = of_get_child_by_name(priv->dev->of_node, "ethernet-ports"); 982 983 if (!ports) 984 return -EINVAL; 985 986 for_each_available_child_of_node(ports, port) { 987 err = of_property_read_u32(port, "reg", ®); 988 if (err) { 989 of_node_put(port); 990 of_node_put(ports); 991 return err; 992 } 993 994 if (!dsa_is_user_port(priv->ds, reg)) 995 continue; 996 997 of_get_phy_mode(port, &mode); 998 999 if (of_property_read_bool(port, "phy-handle") && 1000 mode != PHY_INTERFACE_MODE_INTERNAL) 1001 external_mdio_mask |= BIT(reg); 1002 else 1003 internal_mdio_mask |= BIT(reg); 1004 } 1005 1006 of_node_put(ports); 1007 if (!external_mdio_mask && !internal_mdio_mask) { 1008 dev_err(priv->dev, "no PHYs are defined.\n"); 1009 return -EINVAL; 1010 } 1011 1012 /* The QCA8K_MDIO_MASTER_EN Bit, which grants access to PHYs through 1013 * the MDIO_MASTER register also _disconnects_ the external MDC 1014 * passthrough to the internal PHYs. It's not possible to use both 1015 * configurations at the same time! 1016 * 1017 * Because this came up during the review process: 1018 * If the external mdio-bus driver is capable magically disabling 1019 * the QCA8K_MDIO_MASTER_EN and mutex/spin-locking out the qca8k's 1020 * accessors for the time being, it would be possible to pull this 1021 * off. 1022 */ 1023 if (!!external_mdio_mask && !!internal_mdio_mask) { 1024 dev_err(priv->dev, "either internal or external mdio bus configuration is supported.\n"); 1025 return -EINVAL; 1026 } 1027 1028 if (external_mdio_mask) { 1029 /* Make sure to disable the internal mdio bus in cases 1030 * a dt-overlay and driver reload changed the configuration 1031 */ 1032 1033 return regmap_clear_bits(priv->regmap, QCA8K_MDIO_MASTER_CTRL, 1034 QCA8K_MDIO_MASTER_EN); 1035 } 1036 1037 return qca8k_mdio_register(priv); 1038 } 1039 1040 static int 1041 qca8k_setup_mac_pwr_sel(struct qca8k_priv *priv) 1042 { 1043 u32 mask = 0; 1044 int ret = 0; 1045 1046 /* SoC specific settings for ipq8064. 1047 * If more device require this consider adding 1048 * a dedicated binding. 1049 */ 1050 if (of_machine_is_compatible("qcom,ipq8064")) 1051 mask |= QCA8K_MAC_PWR_RGMII0_1_8V; 1052 1053 /* SoC specific settings for ipq8065 */ 1054 if (of_machine_is_compatible("qcom,ipq8065")) 1055 mask |= QCA8K_MAC_PWR_RGMII1_1_8V; 1056 1057 if (mask) { 1058 ret = qca8k_rmw(priv, QCA8K_REG_MAC_PWR_SEL, 1059 QCA8K_MAC_PWR_RGMII0_1_8V | 1060 QCA8K_MAC_PWR_RGMII1_1_8V, 1061 mask); 1062 } 1063 1064 return ret; 1065 } 1066 1067 static int qca8k_find_cpu_port(struct dsa_switch *ds) 1068 { 1069 struct qca8k_priv *priv = ds->priv; 1070 1071 /* Find the connected cpu port. Valid port are 0 or 6 */ 1072 if (dsa_is_cpu_port(ds, 0)) 1073 return 0; 1074 1075 dev_dbg(priv->dev, "port 0 is not the CPU port. Checking port 6"); 1076 1077 if (dsa_is_cpu_port(ds, 6)) 1078 return 6; 1079 1080 return -EINVAL; 1081 } 1082 1083 static int 1084 qca8k_setup_of_pws_reg(struct qca8k_priv *priv) 1085 { 1086 const struct qca8k_match_data *data = priv->info; 1087 struct device_node *node = priv->dev->of_node; 1088 u32 val = 0; 1089 int ret; 1090 1091 /* QCA8327 require to set to the correct mode. 1092 * His bigger brother QCA8328 have the 172 pin layout. 1093 * Should be applied by default but we set this just to make sure. 1094 */ 1095 if (priv->switch_id == QCA8K_ID_QCA8327) { 1096 /* Set the correct package of 148 pin for QCA8327 */ 1097 if (data->reduced_package) 1098 val |= QCA8327_PWS_PACKAGE148_EN; 1099 1100 ret = qca8k_rmw(priv, QCA8K_REG_PWS, QCA8327_PWS_PACKAGE148_EN, 1101 val); 1102 if (ret) 1103 return ret; 1104 } 1105 1106 if (of_property_read_bool(node, "qca,ignore-power-on-sel")) 1107 val |= QCA8K_PWS_POWER_ON_SEL; 1108 1109 if (of_property_read_bool(node, "qca,led-open-drain")) { 1110 if (!(val & QCA8K_PWS_POWER_ON_SEL)) { 1111 dev_err(priv->dev, "qca,led-open-drain require qca,ignore-power-on-sel to be set."); 1112 return -EINVAL; 1113 } 1114 1115 val |= QCA8K_PWS_LED_OPEN_EN_CSR; 1116 } 1117 1118 return qca8k_rmw(priv, QCA8K_REG_PWS, 1119 QCA8K_PWS_LED_OPEN_EN_CSR | QCA8K_PWS_POWER_ON_SEL, 1120 val); 1121 } 1122 1123 static int 1124 qca8k_parse_port_config(struct qca8k_priv *priv) 1125 { 1126 int port, cpu_port_index = -1, ret; 1127 struct device_node *port_dn; 1128 phy_interface_t mode; 1129 struct dsa_port *dp; 1130 u32 delay; 1131 1132 /* We have 2 CPU port. Check them */ 1133 for (port = 0; port < QCA8K_NUM_PORTS; port++) { 1134 /* Skip every other port */ 1135 if (port != 0 && port != 6) 1136 continue; 1137 1138 dp = dsa_to_port(priv->ds, port); 1139 port_dn = dp->dn; 1140 cpu_port_index++; 1141 1142 if (!of_device_is_available(port_dn)) 1143 continue; 1144 1145 ret = of_get_phy_mode(port_dn, &mode); 1146 if (ret) 1147 continue; 1148 1149 switch (mode) { 1150 case PHY_INTERFACE_MODE_RGMII: 1151 case PHY_INTERFACE_MODE_RGMII_ID: 1152 case PHY_INTERFACE_MODE_RGMII_TXID: 1153 case PHY_INTERFACE_MODE_RGMII_RXID: 1154 case PHY_INTERFACE_MODE_SGMII: 1155 delay = 0; 1156 1157 if (!of_property_read_u32(port_dn, "tx-internal-delay-ps", &delay)) 1158 /* Switch regs accept value in ns, convert ps to ns */ 1159 delay = delay / 1000; 1160 else if (mode == PHY_INTERFACE_MODE_RGMII_ID || 1161 mode == PHY_INTERFACE_MODE_RGMII_TXID) 1162 delay = 1; 1163 1164 if (!FIELD_FIT(QCA8K_PORT_PAD_RGMII_TX_DELAY_MASK, delay)) { 1165 dev_err(priv->dev, "rgmii tx delay is limited to a max value of 3ns, setting to the max value"); 1166 delay = 3; 1167 } 1168 1169 priv->ports_config.rgmii_tx_delay[cpu_port_index] = delay; 1170 1171 delay = 0; 1172 1173 if (!of_property_read_u32(port_dn, "rx-internal-delay-ps", &delay)) 1174 /* Switch regs accept value in ns, convert ps to ns */ 1175 delay = delay / 1000; 1176 else if (mode == PHY_INTERFACE_MODE_RGMII_ID || 1177 mode == PHY_INTERFACE_MODE_RGMII_RXID) 1178 delay = 2; 1179 1180 if (!FIELD_FIT(QCA8K_PORT_PAD_RGMII_RX_DELAY_MASK, delay)) { 1181 dev_err(priv->dev, "rgmii rx delay is limited to a max value of 3ns, setting to the max value"); 1182 delay = 3; 1183 } 1184 1185 priv->ports_config.rgmii_rx_delay[cpu_port_index] = delay; 1186 1187 /* Skip sgmii parsing for rgmii* mode */ 1188 if (mode == PHY_INTERFACE_MODE_RGMII || 1189 mode == PHY_INTERFACE_MODE_RGMII_ID || 1190 mode == PHY_INTERFACE_MODE_RGMII_TXID || 1191 mode == PHY_INTERFACE_MODE_RGMII_RXID) 1192 break; 1193 1194 if (of_property_read_bool(port_dn, "qca,sgmii-txclk-falling-edge")) 1195 priv->ports_config.sgmii_tx_clk_falling_edge = true; 1196 1197 if (of_property_read_bool(port_dn, "qca,sgmii-rxclk-falling-edge")) 1198 priv->ports_config.sgmii_rx_clk_falling_edge = true; 1199 1200 if (of_property_read_bool(port_dn, "qca,sgmii-enable-pll")) { 1201 priv->ports_config.sgmii_enable_pll = true; 1202 1203 if (priv->switch_id == QCA8K_ID_QCA8327) { 1204 dev_err(priv->dev, "SGMII PLL should NOT be enabled for qca8327. Aborting enabling"); 1205 priv->ports_config.sgmii_enable_pll = false; 1206 } 1207 1208 if (priv->switch_revision < 2) 1209 dev_warn(priv->dev, "SGMII PLL should NOT be enabled for qca8337 with revision 2 or more."); 1210 } 1211 1212 break; 1213 default: 1214 continue; 1215 } 1216 } 1217 1218 return 0; 1219 } 1220 1221 static void 1222 qca8k_mac_config_setup_internal_delay(struct qca8k_priv *priv, int cpu_port_index, 1223 u32 reg) 1224 { 1225 u32 delay, val = 0; 1226 int ret; 1227 1228 /* Delay can be declared in 3 different way. 1229 * Mode to rgmii and internal-delay standard binding defined 1230 * rgmii-id or rgmii-tx/rx phy mode set. 1231 * The parse logic set a delay different than 0 only when one 1232 * of the 3 different way is used. In all other case delay is 1233 * not enabled. With ID or TX/RXID delay is enabled and set 1234 * to the default and recommended value. 1235 */ 1236 if (priv->ports_config.rgmii_tx_delay[cpu_port_index]) { 1237 delay = priv->ports_config.rgmii_tx_delay[cpu_port_index]; 1238 1239 val |= QCA8K_PORT_PAD_RGMII_TX_DELAY(delay) | 1240 QCA8K_PORT_PAD_RGMII_TX_DELAY_EN; 1241 } 1242 1243 if (priv->ports_config.rgmii_rx_delay[cpu_port_index]) { 1244 delay = priv->ports_config.rgmii_rx_delay[cpu_port_index]; 1245 1246 val |= QCA8K_PORT_PAD_RGMII_RX_DELAY(delay) | 1247 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN; 1248 } 1249 1250 /* Set RGMII delay based on the selected values */ 1251 ret = qca8k_rmw(priv, reg, 1252 QCA8K_PORT_PAD_RGMII_TX_DELAY_MASK | 1253 QCA8K_PORT_PAD_RGMII_RX_DELAY_MASK | 1254 QCA8K_PORT_PAD_RGMII_TX_DELAY_EN | 1255 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN, 1256 val); 1257 if (ret) 1258 dev_err(priv->dev, "Failed to set internal delay for CPU port%d", 1259 cpu_port_index == QCA8K_CPU_PORT0 ? 0 : 6); 1260 } 1261 1262 static struct phylink_pcs * 1263 qca8k_phylink_mac_select_pcs(struct dsa_switch *ds, int port, 1264 phy_interface_t interface) 1265 { 1266 struct qca8k_priv *priv = ds->priv; 1267 struct phylink_pcs *pcs = NULL; 1268 1269 switch (interface) { 1270 case PHY_INTERFACE_MODE_SGMII: 1271 case PHY_INTERFACE_MODE_1000BASEX: 1272 switch (port) { 1273 case 0: 1274 pcs = &priv->pcs_port_0.pcs; 1275 break; 1276 1277 case 6: 1278 pcs = &priv->pcs_port_6.pcs; 1279 break; 1280 } 1281 break; 1282 1283 default: 1284 break; 1285 } 1286 1287 return pcs; 1288 } 1289 1290 static void 1291 qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, 1292 const struct phylink_link_state *state) 1293 { 1294 struct qca8k_priv *priv = ds->priv; 1295 int cpu_port_index; 1296 u32 reg; 1297 1298 switch (port) { 1299 case 0: /* 1st CPU port */ 1300 if (state->interface != PHY_INTERFACE_MODE_RGMII && 1301 state->interface != PHY_INTERFACE_MODE_RGMII_ID && 1302 state->interface != PHY_INTERFACE_MODE_RGMII_TXID && 1303 state->interface != PHY_INTERFACE_MODE_RGMII_RXID && 1304 state->interface != PHY_INTERFACE_MODE_SGMII) 1305 return; 1306 1307 reg = QCA8K_REG_PORT0_PAD_CTRL; 1308 cpu_port_index = QCA8K_CPU_PORT0; 1309 break; 1310 case 1: 1311 case 2: 1312 case 3: 1313 case 4: 1314 case 5: 1315 /* Internal PHY, nothing to do */ 1316 return; 1317 case 6: /* 2nd CPU port / external PHY */ 1318 if (state->interface != PHY_INTERFACE_MODE_RGMII && 1319 state->interface != PHY_INTERFACE_MODE_RGMII_ID && 1320 state->interface != PHY_INTERFACE_MODE_RGMII_TXID && 1321 state->interface != PHY_INTERFACE_MODE_RGMII_RXID && 1322 state->interface != PHY_INTERFACE_MODE_SGMII && 1323 state->interface != PHY_INTERFACE_MODE_1000BASEX) 1324 return; 1325 1326 reg = QCA8K_REG_PORT6_PAD_CTRL; 1327 cpu_port_index = QCA8K_CPU_PORT6; 1328 break; 1329 default: 1330 dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port); 1331 return; 1332 } 1333 1334 if (port != 6 && phylink_autoneg_inband(mode)) { 1335 dev_err(ds->dev, "%s: in-band negotiation unsupported\n", 1336 __func__); 1337 return; 1338 } 1339 1340 switch (state->interface) { 1341 case PHY_INTERFACE_MODE_RGMII: 1342 case PHY_INTERFACE_MODE_RGMII_ID: 1343 case PHY_INTERFACE_MODE_RGMII_TXID: 1344 case PHY_INTERFACE_MODE_RGMII_RXID: 1345 qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN); 1346 1347 /* Configure rgmii delay */ 1348 qca8k_mac_config_setup_internal_delay(priv, cpu_port_index, reg); 1349 1350 /* QCA8337 requires to set rgmii rx delay for all ports. 1351 * This is enabled through PORT5_PAD_CTRL for all ports, 1352 * rather than individual port registers. 1353 */ 1354 if (priv->switch_id == QCA8K_ID_QCA8337) 1355 qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, 1356 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); 1357 break; 1358 case PHY_INTERFACE_MODE_SGMII: 1359 case PHY_INTERFACE_MODE_1000BASEX: 1360 /* Enable SGMII on the port */ 1361 qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN); 1362 break; 1363 default: 1364 dev_err(ds->dev, "xMII mode %s not supported for port %d\n", 1365 phy_modes(state->interface), port); 1366 return; 1367 } 1368 } 1369 1370 static void qca8k_phylink_get_caps(struct dsa_switch *ds, int port, 1371 struct phylink_config *config) 1372 { 1373 switch (port) { 1374 case 0: /* 1st CPU port */ 1375 phy_interface_set_rgmii(config->supported_interfaces); 1376 __set_bit(PHY_INTERFACE_MODE_SGMII, 1377 config->supported_interfaces); 1378 break; 1379 1380 case 1: 1381 case 2: 1382 case 3: 1383 case 4: 1384 case 5: 1385 /* Internal PHY */ 1386 __set_bit(PHY_INTERFACE_MODE_GMII, 1387 config->supported_interfaces); 1388 __set_bit(PHY_INTERFACE_MODE_INTERNAL, 1389 config->supported_interfaces); 1390 break; 1391 1392 case 6: /* 2nd CPU port / external PHY */ 1393 phy_interface_set_rgmii(config->supported_interfaces); 1394 __set_bit(PHY_INTERFACE_MODE_SGMII, 1395 config->supported_interfaces); 1396 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 1397 config->supported_interfaces); 1398 break; 1399 } 1400 1401 config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | 1402 MAC_10 | MAC_100 | MAC_1000FD; 1403 1404 config->legacy_pre_march2020 = false; 1405 } 1406 1407 static void 1408 qca8k_phylink_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode, 1409 phy_interface_t interface) 1410 { 1411 struct qca8k_priv *priv = ds->priv; 1412 1413 qca8k_port_set_status(priv, port, 0); 1414 } 1415 1416 static void 1417 qca8k_phylink_mac_link_up(struct dsa_switch *ds, int port, unsigned int mode, 1418 phy_interface_t interface, struct phy_device *phydev, 1419 int speed, int duplex, bool tx_pause, bool rx_pause) 1420 { 1421 struct qca8k_priv *priv = ds->priv; 1422 u32 reg; 1423 1424 if (phylink_autoneg_inband(mode)) { 1425 reg = QCA8K_PORT_STATUS_LINK_AUTO; 1426 } else { 1427 switch (speed) { 1428 case SPEED_10: 1429 reg = QCA8K_PORT_STATUS_SPEED_10; 1430 break; 1431 case SPEED_100: 1432 reg = QCA8K_PORT_STATUS_SPEED_100; 1433 break; 1434 case SPEED_1000: 1435 reg = QCA8K_PORT_STATUS_SPEED_1000; 1436 break; 1437 default: 1438 reg = QCA8K_PORT_STATUS_LINK_AUTO; 1439 break; 1440 } 1441 1442 if (duplex == DUPLEX_FULL) 1443 reg |= QCA8K_PORT_STATUS_DUPLEX; 1444 1445 if (rx_pause || dsa_is_cpu_port(ds, port)) 1446 reg |= QCA8K_PORT_STATUS_RXFLOW; 1447 1448 if (tx_pause || dsa_is_cpu_port(ds, port)) 1449 reg |= QCA8K_PORT_STATUS_TXFLOW; 1450 } 1451 1452 reg |= QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC; 1453 1454 qca8k_write(priv, QCA8K_REG_PORT_STATUS(port), reg); 1455 } 1456 1457 static struct qca8k_pcs *pcs_to_qca8k_pcs(struct phylink_pcs *pcs) 1458 { 1459 return container_of(pcs, struct qca8k_pcs, pcs); 1460 } 1461 1462 static void qca8k_pcs_get_state(struct phylink_pcs *pcs, 1463 struct phylink_link_state *state) 1464 { 1465 struct qca8k_priv *priv = pcs_to_qca8k_pcs(pcs)->priv; 1466 int port = pcs_to_qca8k_pcs(pcs)->port; 1467 u32 reg; 1468 int ret; 1469 1470 ret = qca8k_read(priv, QCA8K_REG_PORT_STATUS(port), ®); 1471 if (ret < 0) { 1472 state->link = false; 1473 return; 1474 } 1475 1476 state->link = !!(reg & QCA8K_PORT_STATUS_LINK_UP); 1477 state->an_complete = state->link; 1478 state->duplex = (reg & QCA8K_PORT_STATUS_DUPLEX) ? DUPLEX_FULL : 1479 DUPLEX_HALF; 1480 1481 switch (reg & QCA8K_PORT_STATUS_SPEED) { 1482 case QCA8K_PORT_STATUS_SPEED_10: 1483 state->speed = SPEED_10; 1484 break; 1485 case QCA8K_PORT_STATUS_SPEED_100: 1486 state->speed = SPEED_100; 1487 break; 1488 case QCA8K_PORT_STATUS_SPEED_1000: 1489 state->speed = SPEED_1000; 1490 break; 1491 default: 1492 state->speed = SPEED_UNKNOWN; 1493 break; 1494 } 1495 1496 if (reg & QCA8K_PORT_STATUS_RXFLOW) 1497 state->pause |= MLO_PAUSE_RX; 1498 if (reg & QCA8K_PORT_STATUS_TXFLOW) 1499 state->pause |= MLO_PAUSE_TX; 1500 } 1501 1502 static int qca8k_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 1503 phy_interface_t interface, 1504 const unsigned long *advertising, 1505 bool permit_pause_to_mac) 1506 { 1507 struct qca8k_priv *priv = pcs_to_qca8k_pcs(pcs)->priv; 1508 int cpu_port_index, ret, port; 1509 u32 reg, val; 1510 1511 port = pcs_to_qca8k_pcs(pcs)->port; 1512 switch (port) { 1513 case 0: 1514 reg = QCA8K_REG_PORT0_PAD_CTRL; 1515 cpu_port_index = QCA8K_CPU_PORT0; 1516 break; 1517 1518 case 6: 1519 reg = QCA8K_REG_PORT6_PAD_CTRL; 1520 cpu_port_index = QCA8K_CPU_PORT6; 1521 break; 1522 1523 default: 1524 WARN_ON(1); 1525 return -EINVAL; 1526 } 1527 1528 /* Enable/disable SerDes auto-negotiation as necessary */ 1529 val = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED ? 1530 0 : QCA8K_PWS_SERDES_AEN_DIS; 1531 1532 ret = qca8k_rmw(priv, QCA8K_REG_PWS, QCA8K_PWS_SERDES_AEN_DIS, val); 1533 if (ret) 1534 return ret; 1535 1536 /* Configure the SGMII parameters */ 1537 ret = qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val); 1538 if (ret) 1539 return ret; 1540 1541 val |= QCA8K_SGMII_EN_SD; 1542 1543 if (priv->ports_config.sgmii_enable_pll) 1544 val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX | 1545 QCA8K_SGMII_EN_TX; 1546 1547 if (dsa_is_cpu_port(priv->ds, port)) { 1548 /* CPU port, we're talking to the CPU MAC, be a PHY */ 1549 val &= ~QCA8K_SGMII_MODE_CTRL_MASK; 1550 val |= QCA8K_SGMII_MODE_CTRL_PHY; 1551 } else if (interface == PHY_INTERFACE_MODE_SGMII) { 1552 val &= ~QCA8K_SGMII_MODE_CTRL_MASK; 1553 val |= QCA8K_SGMII_MODE_CTRL_MAC; 1554 } else if (interface == PHY_INTERFACE_MODE_1000BASEX) { 1555 val &= ~QCA8K_SGMII_MODE_CTRL_MASK; 1556 val |= QCA8K_SGMII_MODE_CTRL_BASEX; 1557 } 1558 1559 qca8k_write(priv, QCA8K_REG_SGMII_CTRL, val); 1560 1561 /* From original code is reported port instability as SGMII also 1562 * require delay set. Apply advised values here or take them from DT. 1563 */ 1564 if (interface == PHY_INTERFACE_MODE_SGMII) 1565 qca8k_mac_config_setup_internal_delay(priv, cpu_port_index, reg); 1566 /* For qca8327/qca8328/qca8334/qca8338 sgmii is unique and 1567 * falling edge is set writing in the PORT0 PAD reg 1568 */ 1569 if (priv->switch_id == QCA8K_ID_QCA8327 || 1570 priv->switch_id == QCA8K_ID_QCA8337) 1571 reg = QCA8K_REG_PORT0_PAD_CTRL; 1572 1573 val = 0; 1574 1575 /* SGMII Clock phase configuration */ 1576 if (priv->ports_config.sgmii_rx_clk_falling_edge) 1577 val |= QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE; 1578 1579 if (priv->ports_config.sgmii_tx_clk_falling_edge) 1580 val |= QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE; 1581 1582 if (val) 1583 ret = qca8k_rmw(priv, reg, 1584 QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE | 1585 QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE, 1586 val); 1587 1588 return 0; 1589 } 1590 1591 static void qca8k_pcs_an_restart(struct phylink_pcs *pcs) 1592 { 1593 } 1594 1595 static const struct phylink_pcs_ops qca8k_pcs_ops = { 1596 .pcs_get_state = qca8k_pcs_get_state, 1597 .pcs_config = qca8k_pcs_config, 1598 .pcs_an_restart = qca8k_pcs_an_restart, 1599 }; 1600 1601 static void qca8k_setup_pcs(struct qca8k_priv *priv, struct qca8k_pcs *qpcs, 1602 int port) 1603 { 1604 qpcs->pcs.ops = &qca8k_pcs_ops; 1605 qpcs->pcs.neg_mode = true; 1606 1607 /* We don't have interrupts for link changes, so we need to poll */ 1608 qpcs->pcs.poll = true; 1609 qpcs->priv = priv; 1610 qpcs->port = port; 1611 } 1612 1613 static void qca8k_mib_autocast_handler(struct dsa_switch *ds, struct sk_buff *skb) 1614 { 1615 struct qca8k_mib_eth_data *mib_eth_data; 1616 struct qca8k_priv *priv = ds->priv; 1617 const struct qca8k_mib_desc *mib; 1618 struct mib_ethhdr *mib_ethhdr; 1619 __le32 *data2; 1620 u8 port; 1621 int i; 1622 1623 mib_ethhdr = (struct mib_ethhdr *)skb_mac_header(skb); 1624 mib_eth_data = &priv->mib_eth_data; 1625 1626 /* The switch autocast every port. Ignore other packet and 1627 * parse only the requested one. 1628 */ 1629 port = FIELD_GET(QCA_HDR_RECV_SOURCE_PORT, ntohs(mib_ethhdr->hdr)); 1630 if (port != mib_eth_data->req_port) 1631 goto exit; 1632 1633 data2 = (__le32 *)skb->data; 1634 1635 for (i = 0; i < priv->info->mib_count; i++) { 1636 mib = &ar8327_mib[i]; 1637 1638 /* First 3 mib are present in the skb head */ 1639 if (i < 3) { 1640 mib_eth_data->data[i] = get_unaligned_le32(mib_ethhdr->data + i); 1641 continue; 1642 } 1643 1644 /* Some mib are 64 bit wide */ 1645 if (mib->size == 2) 1646 mib_eth_data->data[i] = get_unaligned_le64((__le64 *)data2); 1647 else 1648 mib_eth_data->data[i] = get_unaligned_le32(data2); 1649 1650 data2 += mib->size; 1651 } 1652 1653 exit: 1654 /* Complete on receiving all the mib packet */ 1655 if (refcount_dec_and_test(&mib_eth_data->port_parsed)) 1656 complete(&mib_eth_data->rw_done); 1657 } 1658 1659 static int 1660 qca8k_get_ethtool_stats_eth(struct dsa_switch *ds, int port, u64 *data) 1661 { 1662 struct dsa_port *dp = dsa_to_port(ds, port); 1663 struct qca8k_mib_eth_data *mib_eth_data; 1664 struct qca8k_priv *priv = ds->priv; 1665 int ret; 1666 1667 mib_eth_data = &priv->mib_eth_data; 1668 1669 mutex_lock(&mib_eth_data->mutex); 1670 1671 reinit_completion(&mib_eth_data->rw_done); 1672 1673 mib_eth_data->req_port = dp->index; 1674 mib_eth_data->data = data; 1675 refcount_set(&mib_eth_data->port_parsed, QCA8K_NUM_PORTS); 1676 1677 mutex_lock(&priv->reg_mutex); 1678 1679 /* Send mib autocast request */ 1680 ret = regmap_update_bits(priv->regmap, QCA8K_REG_MIB, 1681 QCA8K_MIB_FUNC | QCA8K_MIB_BUSY, 1682 FIELD_PREP(QCA8K_MIB_FUNC, QCA8K_MIB_CAST) | 1683 QCA8K_MIB_BUSY); 1684 1685 mutex_unlock(&priv->reg_mutex); 1686 1687 if (ret) 1688 goto exit; 1689 1690 ret = wait_for_completion_timeout(&mib_eth_data->rw_done, QCA8K_ETHERNET_TIMEOUT); 1691 1692 exit: 1693 mutex_unlock(&mib_eth_data->mutex); 1694 1695 return ret; 1696 } 1697 1698 static u32 qca8k_get_phy_flags(struct dsa_switch *ds, int port) 1699 { 1700 struct qca8k_priv *priv = ds->priv; 1701 1702 /* Communicate to the phy internal driver the switch revision. 1703 * Based on the switch revision different values needs to be 1704 * set to the dbg and mmd reg on the phy. 1705 * The first 2 bit are used to communicate the switch revision 1706 * to the phy driver. 1707 */ 1708 if (port > 0 && port < 6) 1709 return priv->switch_revision; 1710 1711 return 0; 1712 } 1713 1714 static enum dsa_tag_protocol 1715 qca8k_get_tag_protocol(struct dsa_switch *ds, int port, 1716 enum dsa_tag_protocol mp) 1717 { 1718 return DSA_TAG_PROTO_QCA; 1719 } 1720 1721 static void 1722 qca8k_master_change(struct dsa_switch *ds, const struct net_device *master, 1723 bool operational) 1724 { 1725 struct dsa_port *dp = master->dsa_ptr; 1726 struct qca8k_priv *priv = ds->priv; 1727 1728 /* Ethernet MIB/MDIO is only supported for CPU port 0 */ 1729 if (dp->index != 0) 1730 return; 1731 1732 mutex_lock(&priv->mgmt_eth_data.mutex); 1733 mutex_lock(&priv->mib_eth_data.mutex); 1734 1735 priv->mgmt_master = operational ? (struct net_device *)master : NULL; 1736 1737 mutex_unlock(&priv->mib_eth_data.mutex); 1738 mutex_unlock(&priv->mgmt_eth_data.mutex); 1739 } 1740 1741 static int qca8k_connect_tag_protocol(struct dsa_switch *ds, 1742 enum dsa_tag_protocol proto) 1743 { 1744 struct qca_tagger_data *tagger_data; 1745 1746 switch (proto) { 1747 case DSA_TAG_PROTO_QCA: 1748 tagger_data = ds->tagger_data; 1749 1750 tagger_data->rw_reg_ack_handler = qca8k_rw_reg_ack_handler; 1751 tagger_data->mib_autocast_handler = qca8k_mib_autocast_handler; 1752 1753 break; 1754 default: 1755 return -EOPNOTSUPP; 1756 } 1757 1758 return 0; 1759 } 1760 1761 static int 1762 qca8k_setup(struct dsa_switch *ds) 1763 { 1764 struct qca8k_priv *priv = ds->priv; 1765 int cpu_port, ret, i; 1766 u32 mask; 1767 1768 cpu_port = qca8k_find_cpu_port(ds); 1769 if (cpu_port < 0) { 1770 dev_err(priv->dev, "No cpu port configured in both cpu port0 and port6"); 1771 return cpu_port; 1772 } 1773 1774 /* Parse CPU port config to be later used in phy_link mac_config */ 1775 ret = qca8k_parse_port_config(priv); 1776 if (ret) 1777 return ret; 1778 1779 ret = qca8k_setup_mdio_bus(priv); 1780 if (ret) 1781 return ret; 1782 1783 ret = qca8k_setup_of_pws_reg(priv); 1784 if (ret) 1785 return ret; 1786 1787 ret = qca8k_setup_mac_pwr_sel(priv); 1788 if (ret) 1789 return ret; 1790 1791 ret = qca8k_setup_led_ctrl(priv); 1792 if (ret) 1793 return ret; 1794 1795 qca8k_setup_pcs(priv, &priv->pcs_port_0, 0); 1796 qca8k_setup_pcs(priv, &priv->pcs_port_6, 6); 1797 1798 /* Make sure MAC06 is disabled */ 1799 ret = regmap_clear_bits(priv->regmap, QCA8K_REG_PORT0_PAD_CTRL, 1800 QCA8K_PORT0_PAD_MAC06_EXCHANGE_EN); 1801 if (ret) { 1802 dev_err(priv->dev, "failed disabling MAC06 exchange"); 1803 return ret; 1804 } 1805 1806 /* Enable CPU Port */ 1807 ret = regmap_set_bits(priv->regmap, QCA8K_REG_GLOBAL_FW_CTRL0, 1808 QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); 1809 if (ret) { 1810 dev_err(priv->dev, "failed enabling CPU port"); 1811 return ret; 1812 } 1813 1814 /* Enable MIB counters */ 1815 ret = qca8k_mib_init(priv); 1816 if (ret) 1817 dev_warn(priv->dev, "mib init failed"); 1818 1819 /* Initial setup of all ports */ 1820 for (i = 0; i < QCA8K_NUM_PORTS; i++) { 1821 /* Disable forwarding by default on all ports */ 1822 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i), 1823 QCA8K_PORT_LOOKUP_MEMBER, 0); 1824 if (ret) 1825 return ret; 1826 1827 /* Enable QCA header mode on all cpu ports */ 1828 if (dsa_is_cpu_port(ds, i)) { 1829 ret = qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(i), 1830 FIELD_PREP(QCA8K_PORT_HDR_CTRL_TX_MASK, QCA8K_PORT_HDR_CTRL_ALL) | 1831 FIELD_PREP(QCA8K_PORT_HDR_CTRL_RX_MASK, QCA8K_PORT_HDR_CTRL_ALL)); 1832 if (ret) { 1833 dev_err(priv->dev, "failed enabling QCA header mode"); 1834 return ret; 1835 } 1836 } 1837 1838 /* Disable MAC by default on all user ports */ 1839 if (dsa_is_user_port(ds, i)) 1840 qca8k_port_set_status(priv, i, 0); 1841 } 1842 1843 /* Forward all unknown frames to CPU port for Linux processing 1844 * Notice that in multi-cpu config only one port should be set 1845 * for igmp, unknown, multicast and broadcast packet 1846 */ 1847 ret = qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1, 1848 FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_MASK, BIT(cpu_port)) | 1849 FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_BC_DP_MASK, BIT(cpu_port)) | 1850 FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_MC_DP_MASK, BIT(cpu_port)) | 1851 FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_UC_DP_MASK, BIT(cpu_port))); 1852 if (ret) 1853 return ret; 1854 1855 /* Setup connection between CPU port & user ports 1856 * Configure specific switch configuration for ports 1857 */ 1858 for (i = 0; i < QCA8K_NUM_PORTS; i++) { 1859 /* CPU port gets connected to all user ports of the switch */ 1860 if (dsa_is_cpu_port(ds, i)) { 1861 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i), 1862 QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds)); 1863 if (ret) 1864 return ret; 1865 } 1866 1867 /* Individual user ports get connected to CPU port only */ 1868 if (dsa_is_user_port(ds, i)) { 1869 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i), 1870 QCA8K_PORT_LOOKUP_MEMBER, 1871 BIT(cpu_port)); 1872 if (ret) 1873 return ret; 1874 1875 /* Enable ARP Auto-learning by default */ 1876 ret = regmap_set_bits(priv->regmap, QCA8K_PORT_LOOKUP_CTRL(i), 1877 QCA8K_PORT_LOOKUP_LEARN); 1878 if (ret) 1879 return ret; 1880 1881 /* For port based vlans to work we need to set the 1882 * default egress vid 1883 */ 1884 ret = qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i), 1885 QCA8K_EGREES_VLAN_PORT_MASK(i), 1886 QCA8K_EGREES_VLAN_PORT(i, QCA8K_PORT_VID_DEF)); 1887 if (ret) 1888 return ret; 1889 1890 ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i), 1891 QCA8K_PORT_VLAN_CVID(QCA8K_PORT_VID_DEF) | 1892 QCA8K_PORT_VLAN_SVID(QCA8K_PORT_VID_DEF)); 1893 if (ret) 1894 return ret; 1895 } 1896 1897 /* The port 5 of the qca8337 have some problem in flood condition. The 1898 * original legacy driver had some specific buffer and priority settings 1899 * for the different port suggested by the QCA switch team. Add this 1900 * missing settings to improve switch stability under load condition. 1901 * This problem is limited to qca8337 and other qca8k switch are not affected. 1902 */ 1903 if (priv->switch_id == QCA8K_ID_QCA8337) { 1904 switch (i) { 1905 /* The 2 CPU port and port 5 requires some different 1906 * priority than any other ports. 1907 */ 1908 case 0: 1909 case 5: 1910 case 6: 1911 mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) | 1912 QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) | 1913 QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x4) | 1914 QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x4) | 1915 QCA8K_PORT_HOL_CTRL0_EG_PRI4(0x6) | 1916 QCA8K_PORT_HOL_CTRL0_EG_PRI5(0x8) | 1917 QCA8K_PORT_HOL_CTRL0_EG_PORT(0x1e); 1918 break; 1919 default: 1920 mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) | 1921 QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) | 1922 QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x6) | 1923 QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x8) | 1924 QCA8K_PORT_HOL_CTRL0_EG_PORT(0x19); 1925 } 1926 qca8k_write(priv, QCA8K_REG_PORT_HOL_CTRL0(i), mask); 1927 1928 mask = QCA8K_PORT_HOL_CTRL1_ING(0x6) | 1929 QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN | 1930 QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN | 1931 QCA8K_PORT_HOL_CTRL1_WRED_EN; 1932 qca8k_rmw(priv, QCA8K_REG_PORT_HOL_CTRL1(i), 1933 QCA8K_PORT_HOL_CTRL1_ING_BUF_MASK | 1934 QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN | 1935 QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN | 1936 QCA8K_PORT_HOL_CTRL1_WRED_EN, 1937 mask); 1938 } 1939 } 1940 1941 /* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */ 1942 if (priv->switch_id == QCA8K_ID_QCA8327) { 1943 mask = QCA8K_GLOBAL_FC_GOL_XON_THRES(288) | 1944 QCA8K_GLOBAL_FC_GOL_XOFF_THRES(496); 1945 qca8k_rmw(priv, QCA8K_REG_GLOBAL_FC_THRESH, 1946 QCA8K_GLOBAL_FC_GOL_XON_THRES_MASK | 1947 QCA8K_GLOBAL_FC_GOL_XOFF_THRES_MASK, 1948 mask); 1949 } 1950 1951 /* Setup our port MTUs to match power on defaults */ 1952 ret = qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN); 1953 if (ret) 1954 dev_warn(priv->dev, "failed setting MTU settings"); 1955 1956 /* Flush the FDB table */ 1957 qca8k_fdb_flush(priv); 1958 1959 /* Set min a max ageing value supported */ 1960 ds->ageing_time_min = 7000; 1961 ds->ageing_time_max = 458745000; 1962 1963 /* Set max number of LAGs supported */ 1964 ds->num_lag_ids = QCA8K_NUM_LAGS; 1965 1966 return 0; 1967 } 1968 1969 static const struct dsa_switch_ops qca8k_switch_ops = { 1970 .get_tag_protocol = qca8k_get_tag_protocol, 1971 .setup = qca8k_setup, 1972 .get_strings = qca8k_get_strings, 1973 .get_ethtool_stats = qca8k_get_ethtool_stats, 1974 .get_sset_count = qca8k_get_sset_count, 1975 .set_ageing_time = qca8k_set_ageing_time, 1976 .get_mac_eee = qca8k_get_mac_eee, 1977 .set_mac_eee = qca8k_set_mac_eee, 1978 .port_enable = qca8k_port_enable, 1979 .port_disable = qca8k_port_disable, 1980 .port_change_mtu = qca8k_port_change_mtu, 1981 .port_max_mtu = qca8k_port_max_mtu, 1982 .port_stp_state_set = qca8k_port_stp_state_set, 1983 .port_bridge_join = qca8k_port_bridge_join, 1984 .port_bridge_leave = qca8k_port_bridge_leave, 1985 .port_fast_age = qca8k_port_fast_age, 1986 .port_fdb_add = qca8k_port_fdb_add, 1987 .port_fdb_del = qca8k_port_fdb_del, 1988 .port_fdb_dump = qca8k_port_fdb_dump, 1989 .port_mdb_add = qca8k_port_mdb_add, 1990 .port_mdb_del = qca8k_port_mdb_del, 1991 .port_mirror_add = qca8k_port_mirror_add, 1992 .port_mirror_del = qca8k_port_mirror_del, 1993 .port_vlan_filtering = qca8k_port_vlan_filtering, 1994 .port_vlan_add = qca8k_port_vlan_add, 1995 .port_vlan_del = qca8k_port_vlan_del, 1996 .phylink_get_caps = qca8k_phylink_get_caps, 1997 .phylink_mac_select_pcs = qca8k_phylink_mac_select_pcs, 1998 .phylink_mac_config = qca8k_phylink_mac_config, 1999 .phylink_mac_link_down = qca8k_phylink_mac_link_down, 2000 .phylink_mac_link_up = qca8k_phylink_mac_link_up, 2001 .get_phy_flags = qca8k_get_phy_flags, 2002 .port_lag_join = qca8k_port_lag_join, 2003 .port_lag_leave = qca8k_port_lag_leave, 2004 .master_state_change = qca8k_master_change, 2005 .connect_tag_protocol = qca8k_connect_tag_protocol, 2006 }; 2007 2008 static int 2009 qca8k_sw_probe(struct mdio_device *mdiodev) 2010 { 2011 struct qca8k_priv *priv; 2012 int ret; 2013 2014 /* allocate the private data struct so that we can probe the switches 2015 * ID register 2016 */ 2017 priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL); 2018 if (!priv) 2019 return -ENOMEM; 2020 2021 priv->bus = mdiodev->bus; 2022 priv->dev = &mdiodev->dev; 2023 priv->info = of_device_get_match_data(priv->dev); 2024 2025 priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset", 2026 GPIOD_ASIS); 2027 if (IS_ERR(priv->reset_gpio)) 2028 return PTR_ERR(priv->reset_gpio); 2029 2030 if (priv->reset_gpio) { 2031 gpiod_set_value_cansleep(priv->reset_gpio, 1); 2032 /* The active low duration must be greater than 10 ms 2033 * and checkpatch.pl wants 20 ms. 2034 */ 2035 msleep(20); 2036 gpiod_set_value_cansleep(priv->reset_gpio, 0); 2037 } 2038 2039 /* Start by setting up the register mapping */ 2040 priv->regmap = devm_regmap_init(&mdiodev->dev, NULL, priv, 2041 &qca8k_regmap_config); 2042 if (IS_ERR(priv->regmap)) { 2043 dev_err(priv->dev, "regmap initialization failed"); 2044 return PTR_ERR(priv->regmap); 2045 } 2046 2047 priv->mdio_cache.page = 0xffff; 2048 2049 /* Check the detected switch id */ 2050 ret = qca8k_read_switch_id(priv); 2051 if (ret) 2052 return ret; 2053 2054 priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL); 2055 if (!priv->ds) 2056 return -ENOMEM; 2057 2058 mutex_init(&priv->mgmt_eth_data.mutex); 2059 init_completion(&priv->mgmt_eth_data.rw_done); 2060 2061 mutex_init(&priv->mib_eth_data.mutex); 2062 init_completion(&priv->mib_eth_data.rw_done); 2063 2064 priv->ds->dev = &mdiodev->dev; 2065 priv->ds->num_ports = QCA8K_NUM_PORTS; 2066 priv->ds->priv = priv; 2067 priv->ds->ops = &qca8k_switch_ops; 2068 mutex_init(&priv->reg_mutex); 2069 dev_set_drvdata(&mdiodev->dev, priv); 2070 2071 return dsa_register_switch(priv->ds); 2072 } 2073 2074 static void 2075 qca8k_sw_remove(struct mdio_device *mdiodev) 2076 { 2077 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev); 2078 int i; 2079 2080 if (!priv) 2081 return; 2082 2083 for (i = 0; i < QCA8K_NUM_PORTS; i++) 2084 qca8k_port_set_status(priv, i, 0); 2085 2086 dsa_unregister_switch(priv->ds); 2087 } 2088 2089 static void qca8k_sw_shutdown(struct mdio_device *mdiodev) 2090 { 2091 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev); 2092 2093 if (!priv) 2094 return; 2095 2096 dsa_switch_shutdown(priv->ds); 2097 2098 dev_set_drvdata(&mdiodev->dev, NULL); 2099 } 2100 2101 #ifdef CONFIG_PM_SLEEP 2102 static void 2103 qca8k_set_pm(struct qca8k_priv *priv, int enable) 2104 { 2105 int port; 2106 2107 for (port = 0; port < QCA8K_NUM_PORTS; port++) { 2108 /* Do not enable on resume if the port was 2109 * disabled before. 2110 */ 2111 if (!(priv->port_enabled_map & BIT(port))) 2112 continue; 2113 2114 qca8k_port_set_status(priv, port, enable); 2115 } 2116 } 2117 2118 static int qca8k_suspend(struct device *dev) 2119 { 2120 struct qca8k_priv *priv = dev_get_drvdata(dev); 2121 2122 qca8k_set_pm(priv, 0); 2123 2124 return dsa_switch_suspend(priv->ds); 2125 } 2126 2127 static int qca8k_resume(struct device *dev) 2128 { 2129 struct qca8k_priv *priv = dev_get_drvdata(dev); 2130 2131 qca8k_set_pm(priv, 1); 2132 2133 return dsa_switch_resume(priv->ds); 2134 } 2135 #endif /* CONFIG_PM_SLEEP */ 2136 2137 static SIMPLE_DEV_PM_OPS(qca8k_pm_ops, 2138 qca8k_suspend, qca8k_resume); 2139 2140 static const struct qca8k_info_ops qca8xxx_ops = { 2141 .autocast_mib = qca8k_get_ethtool_stats_eth, 2142 }; 2143 2144 static const struct qca8k_match_data qca8327 = { 2145 .id = QCA8K_ID_QCA8327, 2146 .reduced_package = true, 2147 .mib_count = QCA8K_QCA832X_MIB_COUNT, 2148 .ops = &qca8xxx_ops, 2149 }; 2150 2151 static const struct qca8k_match_data qca8328 = { 2152 .id = QCA8K_ID_QCA8327, 2153 .mib_count = QCA8K_QCA832X_MIB_COUNT, 2154 .ops = &qca8xxx_ops, 2155 }; 2156 2157 static const struct qca8k_match_data qca833x = { 2158 .id = QCA8K_ID_QCA8337, 2159 .mib_count = QCA8K_QCA833X_MIB_COUNT, 2160 .ops = &qca8xxx_ops, 2161 }; 2162 2163 static const struct of_device_id qca8k_of_match[] = { 2164 { .compatible = "qca,qca8327", .data = &qca8327 }, 2165 { .compatible = "qca,qca8328", .data = &qca8328 }, 2166 { .compatible = "qca,qca8334", .data = &qca833x }, 2167 { .compatible = "qca,qca8337", .data = &qca833x }, 2168 { /* sentinel */ }, 2169 }; 2170 2171 static struct mdio_driver qca8kmdio_driver = { 2172 .probe = qca8k_sw_probe, 2173 .remove = qca8k_sw_remove, 2174 .shutdown = qca8k_sw_shutdown, 2175 .mdiodrv.driver = { 2176 .name = "qca8k", 2177 .of_match_table = qca8k_of_match, 2178 .pm = &qca8k_pm_ops, 2179 }, 2180 }; 2181 2182 mdio_module_driver(qca8kmdio_driver); 2183 2184 MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>"); 2185 MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family"); 2186 MODULE_LICENSE("GPL v2"); 2187 MODULE_ALIAS("platform:qca8k"); 2188