1 /* 2 * Driver for (BCM4706)? GBit MAC core on BCMA bus. 3 * 4 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com> 5 * 6 * Licensed under the GNU/GPL. See COPYING for details. 7 */ 8 9 #include "bgmac.h" 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/delay.h> 14 #include <linux/etherdevice.h> 15 #include <linux/mii.h> 16 #include <linux/phy.h> 17 #include <linux/interrupt.h> 18 #include <linux/dma-mapping.h> 19 #include <bcm47xx_nvram.h> 20 21 static const struct bcma_device_id bgmac_bcma_tbl[] = { 22 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS), 23 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS), 24 BCMA_CORETABLE_END 25 }; 26 MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl); 27 28 static bool bgmac_wait_value(struct bcma_device *core, u16 reg, u32 mask, 29 u32 value, int timeout) 30 { 31 u32 val; 32 int i; 33 34 for (i = 0; i < timeout / 10; i++) { 35 val = bcma_read32(core, reg); 36 if ((val & mask) == value) 37 return true; 38 udelay(10); 39 } 40 pr_err("Timeout waiting for reg 0x%X\n", reg); 41 return false; 42 } 43 44 /************************************************** 45 * DMA 46 **************************************************/ 47 48 static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 49 { 50 u32 val; 51 int i; 52 53 if (!ring->mmio_base) 54 return; 55 56 /* Suspend DMA TX ring first. 57 * bgmac_wait_value doesn't support waiting for any of few values, so 58 * implement whole loop here. 59 */ 60 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 61 BGMAC_DMA_TX_SUSPEND); 62 for (i = 0; i < 10000 / 10; i++) { 63 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 64 val &= BGMAC_DMA_TX_STAT; 65 if (val == BGMAC_DMA_TX_STAT_DISABLED || 66 val == BGMAC_DMA_TX_STAT_IDLEWAIT || 67 val == BGMAC_DMA_TX_STAT_STOPPED) { 68 i = 0; 69 break; 70 } 71 udelay(10); 72 } 73 if (i) 74 bgmac_err(bgmac, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n", 75 ring->mmio_base, val); 76 77 /* Remove SUSPEND bit */ 78 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0); 79 if (!bgmac_wait_value(bgmac->core, 80 ring->mmio_base + BGMAC_DMA_TX_STATUS, 81 BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED, 82 10000)) { 83 bgmac_warn(bgmac, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n", 84 ring->mmio_base); 85 udelay(300); 86 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 87 if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED) 88 bgmac_err(bgmac, "Reset of DMA TX ring 0x%X failed\n", 89 ring->mmio_base); 90 } 91 } 92 93 static void bgmac_dma_tx_enable(struct bgmac *bgmac, 94 struct bgmac_dma_ring *ring) 95 { 96 u32 ctl; 97 98 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL); 99 ctl |= BGMAC_DMA_TX_ENABLE; 100 ctl |= BGMAC_DMA_TX_PARITY_DISABLE; 101 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl); 102 } 103 104 static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac, 105 struct bgmac_dma_ring *ring, 106 struct sk_buff *skb) 107 { 108 struct device *dma_dev = bgmac->core->dma_dev; 109 struct net_device *net_dev = bgmac->net_dev; 110 struct bgmac_dma_desc *dma_desc; 111 struct bgmac_slot_info *slot; 112 u32 ctl0, ctl1; 113 int free_slots; 114 115 if (skb->len > BGMAC_DESC_CTL1_LEN) { 116 bgmac_err(bgmac, "Too long skb (%d)\n", skb->len); 117 goto err_stop_drop; 118 } 119 120 if (ring->start <= ring->end) 121 free_slots = ring->start - ring->end + BGMAC_TX_RING_SLOTS; 122 else 123 free_slots = ring->start - ring->end; 124 if (free_slots == 1) { 125 bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n"); 126 netif_stop_queue(net_dev); 127 return NETDEV_TX_BUSY; 128 } 129 130 slot = &ring->slots[ring->end]; 131 slot->skb = skb; 132 slot->dma_addr = dma_map_single(dma_dev, skb->data, skb->len, 133 DMA_TO_DEVICE); 134 if (dma_mapping_error(dma_dev, slot->dma_addr)) { 135 bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n", 136 ring->mmio_base); 137 goto err_stop_drop; 138 } 139 140 ctl0 = BGMAC_DESC_CTL0_IOC | BGMAC_DESC_CTL0_SOF | BGMAC_DESC_CTL0_EOF; 141 if (ring->end == ring->num_slots - 1) 142 ctl0 |= BGMAC_DESC_CTL0_EOT; 143 ctl1 = skb->len & BGMAC_DESC_CTL1_LEN; 144 145 dma_desc = ring->cpu_base; 146 dma_desc += ring->end; 147 dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr)); 148 dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr)); 149 dma_desc->ctl0 = cpu_to_le32(ctl0); 150 dma_desc->ctl1 = cpu_to_le32(ctl1); 151 152 wmb(); 153 154 /* Increase ring->end to point empty slot. We tell hardware the first 155 * slot it should *not* read. 156 */ 157 if (++ring->end >= BGMAC_TX_RING_SLOTS) 158 ring->end = 0; 159 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX, 160 ring->index_base + 161 ring->end * sizeof(struct bgmac_dma_desc)); 162 163 /* Always keep one slot free to allow detecting bugged calls. */ 164 if (--free_slots == 1) 165 netif_stop_queue(net_dev); 166 167 return NETDEV_TX_OK; 168 169 err_stop_drop: 170 netif_stop_queue(net_dev); 171 dev_kfree_skb(skb); 172 return NETDEV_TX_OK; 173 } 174 175 /* Free transmitted packets */ 176 static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 177 { 178 struct device *dma_dev = bgmac->core->dma_dev; 179 int empty_slot; 180 bool freed = false; 181 182 /* The last slot that hardware didn't consume yet */ 183 empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 184 empty_slot &= BGMAC_DMA_TX_STATDPTR; 185 empty_slot -= ring->index_base; 186 empty_slot &= BGMAC_DMA_TX_STATDPTR; 187 empty_slot /= sizeof(struct bgmac_dma_desc); 188 189 while (ring->start != empty_slot) { 190 struct bgmac_slot_info *slot = &ring->slots[ring->start]; 191 192 if (slot->skb) { 193 /* Unmap no longer used buffer */ 194 dma_unmap_single(dma_dev, slot->dma_addr, 195 slot->skb->len, DMA_TO_DEVICE); 196 slot->dma_addr = 0; 197 198 /* Free memory! :) */ 199 dev_kfree_skb(slot->skb); 200 slot->skb = NULL; 201 } else { 202 bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n", 203 ring->start, ring->end); 204 } 205 206 if (++ring->start >= BGMAC_TX_RING_SLOTS) 207 ring->start = 0; 208 freed = true; 209 } 210 211 if (freed && netif_queue_stopped(bgmac->net_dev)) 212 netif_wake_queue(bgmac->net_dev); 213 } 214 215 static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 216 { 217 if (!ring->mmio_base) 218 return; 219 220 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0); 221 if (!bgmac_wait_value(bgmac->core, 222 ring->mmio_base + BGMAC_DMA_RX_STATUS, 223 BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED, 224 10000)) 225 bgmac_err(bgmac, "Reset of ring 0x%X RX failed\n", 226 ring->mmio_base); 227 } 228 229 static void bgmac_dma_rx_enable(struct bgmac *bgmac, 230 struct bgmac_dma_ring *ring) 231 { 232 u32 ctl; 233 234 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL); 235 ctl &= BGMAC_DMA_RX_ADDREXT_MASK; 236 ctl |= BGMAC_DMA_RX_ENABLE; 237 ctl |= BGMAC_DMA_RX_PARITY_DISABLE; 238 ctl |= BGMAC_DMA_RX_OVERFLOW_CONT; 239 ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT; 240 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl); 241 } 242 243 static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac, 244 struct bgmac_slot_info *slot) 245 { 246 struct device *dma_dev = bgmac->core->dma_dev; 247 struct sk_buff *skb; 248 dma_addr_t dma_addr; 249 struct bgmac_rx_header *rx; 250 251 /* Alloc skb */ 252 skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE); 253 if (!skb) 254 return -ENOMEM; 255 256 /* Poison - if everything goes fine, hardware will overwrite it */ 257 rx = (struct bgmac_rx_header *)skb->data; 258 rx->len = cpu_to_le16(0xdead); 259 rx->flags = cpu_to_le16(0xbeef); 260 261 /* Map skb for the DMA */ 262 dma_addr = dma_map_single(dma_dev, skb->data, 263 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 264 if (dma_mapping_error(dma_dev, dma_addr)) { 265 bgmac_err(bgmac, "DMA mapping error\n"); 266 dev_kfree_skb(skb); 267 return -ENOMEM; 268 } 269 270 /* Update the slot */ 271 slot->skb = skb; 272 slot->dma_addr = dma_addr; 273 274 if (slot->dma_addr & 0xC0000000) 275 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 276 277 return 0; 278 } 279 280 static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, 281 int weight) 282 { 283 u32 end_slot; 284 int handled = 0; 285 286 end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS); 287 end_slot &= BGMAC_DMA_RX_STATDPTR; 288 end_slot -= ring->index_base; 289 end_slot &= BGMAC_DMA_RX_STATDPTR; 290 end_slot /= sizeof(struct bgmac_dma_desc); 291 292 ring->end = end_slot; 293 294 while (ring->start != ring->end) { 295 struct device *dma_dev = bgmac->core->dma_dev; 296 struct bgmac_slot_info *slot = &ring->slots[ring->start]; 297 struct sk_buff *skb = slot->skb; 298 struct sk_buff *new_skb; 299 struct bgmac_rx_header *rx; 300 u16 len, flags; 301 302 /* Unmap buffer to make it accessible to the CPU */ 303 dma_sync_single_for_cpu(dma_dev, slot->dma_addr, 304 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 305 306 /* Get info from the header */ 307 rx = (struct bgmac_rx_header *)skb->data; 308 len = le16_to_cpu(rx->len); 309 flags = le16_to_cpu(rx->flags); 310 311 /* Check for poison and drop or pass the packet */ 312 if (len == 0xdead && flags == 0xbeef) { 313 bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n", 314 ring->start); 315 } else { 316 /* Omit CRC. */ 317 len -= ETH_FCS_LEN; 318 319 new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len); 320 if (new_skb) { 321 skb_put(new_skb, len); 322 skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET, 323 new_skb->data, 324 len); 325 skb_checksum_none_assert(skb); 326 new_skb->protocol = 327 eth_type_trans(new_skb, bgmac->net_dev); 328 netif_receive_skb(new_skb); 329 handled++; 330 } else { 331 bgmac->net_dev->stats.rx_dropped++; 332 bgmac_err(bgmac, "Allocation of skb for copying packet failed!\n"); 333 } 334 335 /* Poison the old skb */ 336 rx->len = cpu_to_le16(0xdead); 337 rx->flags = cpu_to_le16(0xbeef); 338 } 339 340 /* Make it back accessible to the hardware */ 341 dma_sync_single_for_device(dma_dev, slot->dma_addr, 342 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 343 344 if (++ring->start >= BGMAC_RX_RING_SLOTS) 345 ring->start = 0; 346 347 if (handled >= weight) /* Should never be greater */ 348 break; 349 } 350 351 return handled; 352 } 353 354 /* Does ring support unaligned addressing? */ 355 static bool bgmac_dma_unaligned(struct bgmac *bgmac, 356 struct bgmac_dma_ring *ring, 357 enum bgmac_dma_ring_type ring_type) 358 { 359 switch (ring_type) { 360 case BGMAC_DMA_RING_TX: 361 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 362 0xff0); 363 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO)) 364 return true; 365 break; 366 case BGMAC_DMA_RING_RX: 367 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 368 0xff0); 369 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO)) 370 return true; 371 break; 372 } 373 return false; 374 } 375 376 static void bgmac_dma_ring_free(struct bgmac *bgmac, 377 struct bgmac_dma_ring *ring) 378 { 379 struct device *dma_dev = bgmac->core->dma_dev; 380 struct bgmac_slot_info *slot; 381 int size; 382 int i; 383 384 for (i = 0; i < ring->num_slots; i++) { 385 slot = &ring->slots[i]; 386 if (slot->skb) { 387 if (slot->dma_addr) 388 dma_unmap_single(dma_dev, slot->dma_addr, 389 slot->skb->len, DMA_TO_DEVICE); 390 dev_kfree_skb(slot->skb); 391 } 392 } 393 394 if (ring->cpu_base) { 395 /* Free ring of descriptors */ 396 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 397 dma_free_coherent(dma_dev, size, ring->cpu_base, 398 ring->dma_base); 399 } 400 } 401 402 static void bgmac_dma_free(struct bgmac *bgmac) 403 { 404 int i; 405 406 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 407 bgmac_dma_ring_free(bgmac, &bgmac->tx_ring[i]); 408 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 409 bgmac_dma_ring_free(bgmac, &bgmac->rx_ring[i]); 410 } 411 412 static int bgmac_dma_alloc(struct bgmac *bgmac) 413 { 414 struct device *dma_dev = bgmac->core->dma_dev; 415 struct bgmac_dma_ring *ring; 416 static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1, 417 BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, }; 418 int size; /* ring size: different for Tx and Rx */ 419 int err; 420 int i; 421 422 BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base)); 423 BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base)); 424 425 if (!(bcma_aread32(bgmac->core, BCMA_IOST) & BCMA_IOST_DMA64)) { 426 bgmac_err(bgmac, "Core does not report 64-bit DMA\n"); 427 return -ENOTSUPP; 428 } 429 430 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 431 ring = &bgmac->tx_ring[i]; 432 ring->num_slots = BGMAC_TX_RING_SLOTS; 433 ring->mmio_base = ring_base[i]; 434 435 /* Alloc ring of descriptors */ 436 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 437 ring->cpu_base = dma_zalloc_coherent(dma_dev, size, 438 &ring->dma_base, 439 GFP_KERNEL); 440 if (!ring->cpu_base) { 441 bgmac_err(bgmac, "Allocation of TX ring 0x%X failed\n", 442 ring->mmio_base); 443 goto err_dma_free; 444 } 445 if (ring->dma_base & 0xC0000000) 446 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 447 448 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, 449 BGMAC_DMA_RING_TX); 450 if (ring->unaligned) 451 ring->index_base = lower_32_bits(ring->dma_base); 452 else 453 ring->index_base = 0; 454 455 /* No need to alloc TX slots yet */ 456 } 457 458 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 459 int j; 460 461 ring = &bgmac->rx_ring[i]; 462 ring->num_slots = BGMAC_RX_RING_SLOTS; 463 ring->mmio_base = ring_base[i]; 464 465 /* Alloc ring of descriptors */ 466 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 467 ring->cpu_base = dma_zalloc_coherent(dma_dev, size, 468 &ring->dma_base, 469 GFP_KERNEL); 470 if (!ring->cpu_base) { 471 bgmac_err(bgmac, "Allocation of RX ring 0x%X failed\n", 472 ring->mmio_base); 473 err = -ENOMEM; 474 goto err_dma_free; 475 } 476 if (ring->dma_base & 0xC0000000) 477 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 478 479 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, 480 BGMAC_DMA_RING_RX); 481 if (ring->unaligned) 482 ring->index_base = lower_32_bits(ring->dma_base); 483 else 484 ring->index_base = 0; 485 486 /* Alloc RX slots */ 487 for (j = 0; j < ring->num_slots; j++) { 488 err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]); 489 if (err) { 490 bgmac_err(bgmac, "Can't allocate skb for slot in RX ring\n"); 491 goto err_dma_free; 492 } 493 } 494 } 495 496 return 0; 497 498 err_dma_free: 499 bgmac_dma_free(bgmac); 500 return -ENOMEM; 501 } 502 503 static void bgmac_dma_init(struct bgmac *bgmac) 504 { 505 struct bgmac_dma_ring *ring; 506 struct bgmac_dma_desc *dma_desc; 507 u32 ctl0, ctl1; 508 int i; 509 510 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 511 ring = &bgmac->tx_ring[i]; 512 513 if (!ring->unaligned) 514 bgmac_dma_tx_enable(bgmac, ring); 515 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 516 lower_32_bits(ring->dma_base)); 517 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI, 518 upper_32_bits(ring->dma_base)); 519 if (ring->unaligned) 520 bgmac_dma_tx_enable(bgmac, ring); 521 522 ring->start = 0; 523 ring->end = 0; /* Points the slot that should *not* be read */ 524 } 525 526 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 527 int j; 528 529 ring = &bgmac->rx_ring[i]; 530 531 if (!ring->unaligned) 532 bgmac_dma_rx_enable(bgmac, ring); 533 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 534 lower_32_bits(ring->dma_base)); 535 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI, 536 upper_32_bits(ring->dma_base)); 537 if (ring->unaligned) 538 bgmac_dma_rx_enable(bgmac, ring); 539 540 for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots; 541 j++, dma_desc++) { 542 ctl0 = ctl1 = 0; 543 544 if (j == ring->num_slots - 1) 545 ctl0 |= BGMAC_DESC_CTL0_EOT; 546 ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN; 547 /* Is there any BGMAC device that requires extension? */ 548 /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) & 549 * B43_DMA64_DCTL1_ADDREXT_MASK; 550 */ 551 552 dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[j].dma_addr)); 553 dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[j].dma_addr)); 554 dma_desc->ctl0 = cpu_to_le32(ctl0); 555 dma_desc->ctl1 = cpu_to_le32(ctl1); 556 } 557 558 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, 559 ring->index_base + 560 ring->num_slots * sizeof(struct bgmac_dma_desc)); 561 562 ring->start = 0; 563 ring->end = 0; 564 } 565 } 566 567 /************************************************** 568 * PHY ops 569 **************************************************/ 570 571 static u16 bgmac_phy_read(struct bgmac *bgmac, u8 phyaddr, u8 reg) 572 { 573 struct bcma_device *core; 574 u16 phy_access_addr; 575 u16 phy_ctl_addr; 576 u32 tmp; 577 578 BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK); 579 BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK); 580 BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT); 581 BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK); 582 BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT); 583 BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE); 584 BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START); 585 BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK); 586 BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK); 587 BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT); 588 BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE); 589 590 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { 591 core = bgmac->core->bus->drv_gmac_cmn.core; 592 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; 593 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; 594 } else { 595 core = bgmac->core; 596 phy_access_addr = BGMAC_PHY_ACCESS; 597 phy_ctl_addr = BGMAC_PHY_CNTL; 598 } 599 600 tmp = bcma_read32(core, phy_ctl_addr); 601 tmp &= ~BGMAC_PC_EPA_MASK; 602 tmp |= phyaddr; 603 bcma_write32(core, phy_ctl_addr, tmp); 604 605 tmp = BGMAC_PA_START; 606 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; 607 tmp |= reg << BGMAC_PA_REG_SHIFT; 608 bcma_write32(core, phy_access_addr, tmp); 609 610 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) { 611 bgmac_err(bgmac, "Reading PHY %d register 0x%X failed\n", 612 phyaddr, reg); 613 return 0xffff; 614 } 615 616 return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK; 617 } 618 619 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */ 620 static int bgmac_phy_write(struct bgmac *bgmac, u8 phyaddr, u8 reg, u16 value) 621 { 622 struct bcma_device *core; 623 u16 phy_access_addr; 624 u16 phy_ctl_addr; 625 u32 tmp; 626 627 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { 628 core = bgmac->core->bus->drv_gmac_cmn.core; 629 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; 630 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; 631 } else { 632 core = bgmac->core; 633 phy_access_addr = BGMAC_PHY_ACCESS; 634 phy_ctl_addr = BGMAC_PHY_CNTL; 635 } 636 637 tmp = bcma_read32(core, phy_ctl_addr); 638 tmp &= ~BGMAC_PC_EPA_MASK; 639 tmp |= phyaddr; 640 bcma_write32(core, phy_ctl_addr, tmp); 641 642 bgmac_write(bgmac, BGMAC_INT_STATUS, BGMAC_IS_MDIO); 643 if (bgmac_read(bgmac, BGMAC_INT_STATUS) & BGMAC_IS_MDIO) 644 bgmac_warn(bgmac, "Error setting MDIO int\n"); 645 646 tmp = BGMAC_PA_START; 647 tmp |= BGMAC_PA_WRITE; 648 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; 649 tmp |= reg << BGMAC_PA_REG_SHIFT; 650 tmp |= value; 651 bcma_write32(core, phy_access_addr, tmp); 652 653 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) { 654 bgmac_err(bgmac, "Writing to PHY %d register 0x%X failed\n", 655 phyaddr, reg); 656 return -ETIMEDOUT; 657 } 658 659 return 0; 660 } 661 662 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyforce */ 663 static void bgmac_phy_force(struct bgmac *bgmac) 664 { 665 u16 ctl; 666 u16 mask = ~(BGMAC_PHY_CTL_SPEED | BGMAC_PHY_CTL_SPEED_MSB | 667 BGMAC_PHY_CTL_ANENAB | BGMAC_PHY_CTL_DUPLEX); 668 669 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 670 return; 671 672 if (bgmac->autoneg) 673 return; 674 675 ctl = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL); 676 ctl &= mask; 677 if (bgmac->full_duplex) 678 ctl |= BGMAC_PHY_CTL_DUPLEX; 679 if (bgmac->speed == BGMAC_SPEED_100) 680 ctl |= BGMAC_PHY_CTL_SPEED_100; 681 else if (bgmac->speed == BGMAC_SPEED_1000) 682 ctl |= BGMAC_PHY_CTL_SPEED_1000; 683 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, ctl); 684 } 685 686 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyadvertise */ 687 static void bgmac_phy_advertise(struct bgmac *bgmac) 688 { 689 u16 adv; 690 691 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 692 return; 693 694 if (!bgmac->autoneg) 695 return; 696 697 /* Adv selected 10/100 speeds */ 698 adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV); 699 adv &= ~(BGMAC_PHY_ADV_10HALF | BGMAC_PHY_ADV_10FULL | 700 BGMAC_PHY_ADV_100HALF | BGMAC_PHY_ADV_100FULL); 701 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) 702 adv |= BGMAC_PHY_ADV_10HALF; 703 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) 704 adv |= BGMAC_PHY_ADV_100HALF; 705 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) 706 adv |= BGMAC_PHY_ADV_10FULL; 707 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) 708 adv |= BGMAC_PHY_ADV_100FULL; 709 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV, adv); 710 711 /* Adv selected 1000 speeds */ 712 adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2); 713 adv &= ~(BGMAC_PHY_ADV2_1000HALF | BGMAC_PHY_ADV2_1000FULL); 714 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) 715 adv |= BGMAC_PHY_ADV2_1000HALF; 716 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) 717 adv |= BGMAC_PHY_ADV2_1000FULL; 718 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2, adv); 719 720 /* Restart */ 721 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, 722 bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) | 723 BGMAC_PHY_CTL_RESTART); 724 } 725 726 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */ 727 static void bgmac_phy_init(struct bgmac *bgmac) 728 { 729 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; 730 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; 731 u8 i; 732 733 if (ci->id == BCMA_CHIP_ID_BCM5356) { 734 for (i = 0; i < 5; i++) { 735 bgmac_phy_write(bgmac, i, 0x1f, 0x008b); 736 bgmac_phy_write(bgmac, i, 0x15, 0x0100); 737 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 738 bgmac_phy_write(bgmac, i, 0x12, 0x2aaa); 739 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 740 } 741 } 742 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) || 743 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) || 744 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) { 745 bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0); 746 bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0); 747 for (i = 0; i < 5; i++) { 748 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 749 bgmac_phy_write(bgmac, i, 0x16, 0x5284); 750 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 751 bgmac_phy_write(bgmac, i, 0x17, 0x0010); 752 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 753 bgmac_phy_write(bgmac, i, 0x16, 0x5296); 754 bgmac_phy_write(bgmac, i, 0x17, 0x1073); 755 bgmac_phy_write(bgmac, i, 0x17, 0x9073); 756 bgmac_phy_write(bgmac, i, 0x16, 0x52b6); 757 bgmac_phy_write(bgmac, i, 0x17, 0x9273); 758 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 759 } 760 } 761 } 762 763 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */ 764 static void bgmac_phy_reset(struct bgmac *bgmac) 765 { 766 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 767 return; 768 769 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, 770 BGMAC_PHY_CTL_RESET); 771 udelay(100); 772 if (bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) & 773 BGMAC_PHY_CTL_RESET) 774 bgmac_err(bgmac, "PHY reset failed\n"); 775 bgmac_phy_init(bgmac); 776 } 777 778 /************************************************** 779 * Chip ops 780 **************************************************/ 781 782 /* TODO: can we just drop @force? Can we don't reset MAC at all if there is 783 * nothing to change? Try if after stabilizng driver. 784 */ 785 static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set, 786 bool force) 787 { 788 u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 789 u32 new_val = (cmdcfg & mask) | set; 790 791 bgmac_set(bgmac, BGMAC_CMDCFG, BGMAC_CMDCFG_SR); 792 udelay(2); 793 794 if (new_val != cmdcfg || force) 795 bgmac_write(bgmac, BGMAC_CMDCFG, new_val); 796 797 bgmac_mask(bgmac, BGMAC_CMDCFG, ~BGMAC_CMDCFG_SR); 798 udelay(2); 799 } 800 801 static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr) 802 { 803 u32 tmp; 804 805 tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]; 806 bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp); 807 tmp = (addr[4] << 8) | addr[5]; 808 bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp); 809 } 810 811 static void bgmac_set_rx_mode(struct net_device *net_dev) 812 { 813 struct bgmac *bgmac = netdev_priv(net_dev); 814 815 if (net_dev->flags & IFF_PROMISC) 816 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true); 817 else 818 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true); 819 } 820 821 #if 0 /* We don't use that regs yet */ 822 static void bgmac_chip_stats_update(struct bgmac *bgmac) 823 { 824 int i; 825 826 if (bgmac->core->id.id != BCMA_CORE_4706_MAC_GBIT) { 827 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 828 bgmac->mib_tx_regs[i] = 829 bgmac_read(bgmac, 830 BGMAC_TX_GOOD_OCTETS + (i * 4)); 831 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 832 bgmac->mib_rx_regs[i] = 833 bgmac_read(bgmac, 834 BGMAC_RX_GOOD_OCTETS + (i * 4)); 835 } 836 837 /* TODO: what else? how to handle BCM4706? Specs are needed */ 838 } 839 #endif 840 841 static void bgmac_clear_mib(struct bgmac *bgmac) 842 { 843 int i; 844 845 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) 846 return; 847 848 bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR); 849 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 850 bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4)); 851 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 852 bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4)); 853 } 854 855 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */ 856 static void bgmac_speed(struct bgmac *bgmac, int speed) 857 { 858 u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD); 859 u32 set = 0; 860 861 if (speed & BGMAC_SPEED_10) 862 set |= BGMAC_CMDCFG_ES_10; 863 if (speed & BGMAC_SPEED_100) 864 set |= BGMAC_CMDCFG_ES_100; 865 if (speed & BGMAC_SPEED_1000) 866 set |= BGMAC_CMDCFG_ES_1000; 867 if (!bgmac->full_duplex) 868 set |= BGMAC_CMDCFG_HD; 869 bgmac_cmdcfg_maskset(bgmac, mask, set, true); 870 } 871 872 static void bgmac_miiconfig(struct bgmac *bgmac) 873 { 874 u8 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> 875 BGMAC_DS_MM_SHIFT; 876 if (imode == 0 || imode == 1) { 877 if (bgmac->autoneg) 878 bgmac_speed(bgmac, BGMAC_SPEED_100); 879 else 880 bgmac_speed(bgmac, bgmac->speed); 881 } 882 } 883 884 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */ 885 static void bgmac_chip_reset(struct bgmac *bgmac) 886 { 887 struct bcma_device *core = bgmac->core; 888 struct bcma_bus *bus = core->bus; 889 struct bcma_chipinfo *ci = &bus->chipinfo; 890 u32 flags = 0; 891 u32 iost; 892 int i; 893 894 if (bcma_core_is_enabled(core)) { 895 if (!bgmac->stats_grabbed) { 896 /* bgmac_chip_stats_update(bgmac); */ 897 bgmac->stats_grabbed = true; 898 } 899 900 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 901 bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]); 902 903 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); 904 udelay(1); 905 906 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 907 bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]); 908 909 /* TODO: Clear software multicast filter list */ 910 } 911 912 iost = bcma_aread32(core, BCMA_IOST); 913 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 10) || 914 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) || 915 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) 916 iost &= ~BGMAC_BCMA_IOST_ATTACHED; 917 918 if (iost & BGMAC_BCMA_IOST_ATTACHED) { 919 flags = BGMAC_BCMA_IOCTL_SW_CLKEN; 920 if (!bgmac->has_robosw) 921 flags |= BGMAC_BCMA_IOCTL_SW_RESET; 922 } 923 924 bcma_core_enable(core, flags); 925 926 if (core->id.rev > 2) { 927 bgmac_set(bgmac, BCMA_CLKCTLST, 1 << 8); 928 bgmac_wait_value(bgmac->core, BCMA_CLKCTLST, 1 << 24, 1 << 24, 929 1000); 930 } 931 932 if (ci->id == BCMA_CHIP_ID_BCM5357 || ci->id == BCMA_CHIP_ID_BCM4749 || 933 ci->id == BCMA_CHIP_ID_BCM53572) { 934 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; 935 u8 et_swtype = 0; 936 u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY | 937 BGMAC_CHIPCTL_1_IF_TYPE_MII; 938 char buf[4]; 939 940 if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) { 941 if (kstrtou8(buf, 0, &et_swtype)) 942 bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n", 943 buf); 944 et_swtype &= 0x0f; 945 et_swtype <<= 4; 946 sw_type = et_swtype; 947 } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 9) { 948 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII; 949 } else if ((ci->id != BCMA_CHIP_ID_BCM53572 && ci->pkg == 10) || 950 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) { 951 sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII | 952 BGMAC_CHIPCTL_1_SW_TYPE_RGMII; 953 } 954 bcma_chipco_chipctl_maskset(cc, 1, 955 ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK | 956 BGMAC_CHIPCTL_1_SW_TYPE_MASK), 957 sw_type); 958 } 959 960 if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw) 961 bcma_awrite32(core, BCMA_IOCTL, 962 bcma_aread32(core, BCMA_IOCTL) & 963 ~BGMAC_BCMA_IOCTL_SW_RESET); 964 965 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset 966 * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine 967 * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to 968 * be keps until taking MAC out of the reset. 969 */ 970 bgmac_cmdcfg_maskset(bgmac, 971 ~(BGMAC_CMDCFG_TE | 972 BGMAC_CMDCFG_RE | 973 BGMAC_CMDCFG_RPI | 974 BGMAC_CMDCFG_TAI | 975 BGMAC_CMDCFG_HD | 976 BGMAC_CMDCFG_ML | 977 BGMAC_CMDCFG_CFE | 978 BGMAC_CMDCFG_RL | 979 BGMAC_CMDCFG_RED | 980 BGMAC_CMDCFG_PE | 981 BGMAC_CMDCFG_TPI | 982 BGMAC_CMDCFG_PAD_EN | 983 BGMAC_CMDCFG_PF), 984 BGMAC_CMDCFG_PROM | 985 BGMAC_CMDCFG_NLC | 986 BGMAC_CMDCFG_CFE | 987 BGMAC_CMDCFG_SR, 988 false); 989 990 bgmac_clear_mib(bgmac); 991 if (core->id.id == BCMA_CORE_4706_MAC_GBIT) 992 bcma_maskset32(bgmac->cmn, BCMA_GMAC_CMN_PHY_CTL, ~0, 993 BCMA_GMAC_CMN_PC_MTE); 994 else 995 bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE); 996 bgmac_miiconfig(bgmac); 997 bgmac_phy_init(bgmac); 998 999 bgmac->int_status = 0; 1000 } 1001 1002 static void bgmac_chip_intrs_on(struct bgmac *bgmac) 1003 { 1004 bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask); 1005 } 1006 1007 static void bgmac_chip_intrs_off(struct bgmac *bgmac) 1008 { 1009 bgmac_write(bgmac, BGMAC_INT_MASK, 0); 1010 bgmac_read(bgmac, BGMAC_INT_MASK); 1011 } 1012 1013 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */ 1014 static void bgmac_enable(struct bgmac *bgmac) 1015 { 1016 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; 1017 u32 cmdcfg; 1018 u32 mode; 1019 u32 rxq_ctl; 1020 u32 fl_ctl; 1021 u16 bp_clk; 1022 u8 mdp; 1023 1024 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 1025 bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE), 1026 BGMAC_CMDCFG_SR, true); 1027 udelay(2); 1028 cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE; 1029 bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg); 1030 1031 mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> 1032 BGMAC_DS_MM_SHIFT; 1033 if (ci->id != BCMA_CHIP_ID_BCM47162 || mode != 0) 1034 bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT); 1035 if (ci->id == BCMA_CHIP_ID_BCM47162 && mode == 2) 1036 bcma_chipco_chipctl_maskset(&bgmac->core->bus->drv_cc, 1, ~0, 1037 BGMAC_CHIPCTL_1_RXC_DLL_BYPASS); 1038 1039 switch (ci->id) { 1040 case BCMA_CHIP_ID_BCM5357: 1041 case BCMA_CHIP_ID_BCM4749: 1042 case BCMA_CHIP_ID_BCM53572: 1043 case BCMA_CHIP_ID_BCM4716: 1044 case BCMA_CHIP_ID_BCM47162: 1045 fl_ctl = 0x03cb04cb; 1046 if (ci->id == BCMA_CHIP_ID_BCM5357 || 1047 ci->id == BCMA_CHIP_ID_BCM4749 || 1048 ci->id == BCMA_CHIP_ID_BCM53572) 1049 fl_ctl = 0x2300e1; 1050 bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl); 1051 bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff); 1052 break; 1053 } 1054 1055 rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL); 1056 rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK; 1057 bp_clk = bcma_pmu_get_bus_clock(&bgmac->core->bus->drv_cc) / 1000000; 1058 mdp = (bp_clk * 128 / 1000) - 3; 1059 rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT); 1060 bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl); 1061 } 1062 1063 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */ 1064 static void bgmac_chip_init(struct bgmac *bgmac, bool full_init) 1065 { 1066 struct bgmac_dma_ring *ring; 1067 int i; 1068 1069 /* 1 interrupt per received frame */ 1070 bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT); 1071 1072 /* Enable 802.3x tx flow control (honor received PAUSE frames) */ 1073 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true); 1074 1075 bgmac_set_rx_mode(bgmac->net_dev); 1076 1077 bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr); 1078 1079 if (bgmac->loopback) 1080 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); 1081 else 1082 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false); 1083 1084 bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN); 1085 1086 if (!bgmac->autoneg) { 1087 bgmac_speed(bgmac, bgmac->speed); 1088 bgmac_phy_force(bgmac); 1089 } else if (bgmac->speed) { /* if there is anything to adv */ 1090 bgmac_phy_advertise(bgmac); 1091 } 1092 1093 if (full_init) { 1094 bgmac_dma_init(bgmac); 1095 if (1) /* FIXME: is there any case we don't want IRQs? */ 1096 bgmac_chip_intrs_on(bgmac); 1097 } else { 1098 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 1099 ring = &bgmac->rx_ring[i]; 1100 bgmac_dma_rx_enable(bgmac, ring); 1101 } 1102 } 1103 1104 bgmac_enable(bgmac); 1105 } 1106 1107 static irqreturn_t bgmac_interrupt(int irq, void *dev_id) 1108 { 1109 struct bgmac *bgmac = netdev_priv(dev_id); 1110 1111 u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS); 1112 int_status &= bgmac->int_mask; 1113 1114 if (!int_status) 1115 return IRQ_NONE; 1116 1117 /* Ack */ 1118 bgmac_write(bgmac, BGMAC_INT_STATUS, int_status); 1119 1120 /* Disable new interrupts until handling existing ones */ 1121 bgmac_chip_intrs_off(bgmac); 1122 1123 bgmac->int_status = int_status; 1124 1125 napi_schedule(&bgmac->napi); 1126 1127 return IRQ_HANDLED; 1128 } 1129 1130 static int bgmac_poll(struct napi_struct *napi, int weight) 1131 { 1132 struct bgmac *bgmac = container_of(napi, struct bgmac, napi); 1133 struct bgmac_dma_ring *ring; 1134 int handled = 0; 1135 1136 if (bgmac->int_status & BGMAC_IS_TX0) { 1137 ring = &bgmac->tx_ring[0]; 1138 bgmac_dma_tx_free(bgmac, ring); 1139 bgmac->int_status &= ~BGMAC_IS_TX0; 1140 } 1141 1142 if (bgmac->int_status & BGMAC_IS_RX) { 1143 ring = &bgmac->rx_ring[0]; 1144 handled += bgmac_dma_rx_read(bgmac, ring, weight); 1145 bgmac->int_status &= ~BGMAC_IS_RX; 1146 } 1147 1148 if (bgmac->int_status) { 1149 bgmac_err(bgmac, "Unknown IRQs: 0x%08X\n", bgmac->int_status); 1150 bgmac->int_status = 0; 1151 } 1152 1153 if (handled < weight) 1154 napi_complete(napi); 1155 1156 bgmac_chip_intrs_on(bgmac); 1157 1158 return handled; 1159 } 1160 1161 /************************************************** 1162 * net_device_ops 1163 **************************************************/ 1164 1165 static int bgmac_open(struct net_device *net_dev) 1166 { 1167 struct bgmac *bgmac = netdev_priv(net_dev); 1168 int err = 0; 1169 1170 bgmac_chip_reset(bgmac); 1171 /* Specs say about reclaiming rings here, but we do that in DMA init */ 1172 bgmac_chip_init(bgmac, true); 1173 1174 err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED, 1175 KBUILD_MODNAME, net_dev); 1176 if (err < 0) { 1177 bgmac_err(bgmac, "IRQ request error: %d!\n", err); 1178 goto err_out; 1179 } 1180 napi_enable(&bgmac->napi); 1181 1182 netif_carrier_on(net_dev); 1183 1184 err_out: 1185 return err; 1186 } 1187 1188 static int bgmac_stop(struct net_device *net_dev) 1189 { 1190 struct bgmac *bgmac = netdev_priv(net_dev); 1191 1192 netif_carrier_off(net_dev); 1193 1194 napi_disable(&bgmac->napi); 1195 bgmac_chip_intrs_off(bgmac); 1196 free_irq(bgmac->core->irq, net_dev); 1197 1198 bgmac_chip_reset(bgmac); 1199 1200 return 0; 1201 } 1202 1203 static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb, 1204 struct net_device *net_dev) 1205 { 1206 struct bgmac *bgmac = netdev_priv(net_dev); 1207 struct bgmac_dma_ring *ring; 1208 1209 /* No QOS support yet */ 1210 ring = &bgmac->tx_ring[0]; 1211 return bgmac_dma_tx_add(bgmac, ring, skb); 1212 } 1213 1214 static int bgmac_set_mac_address(struct net_device *net_dev, void *addr) 1215 { 1216 struct bgmac *bgmac = netdev_priv(net_dev); 1217 int ret; 1218 1219 ret = eth_prepare_mac_addr_change(net_dev, addr); 1220 if (ret < 0) 1221 return ret; 1222 bgmac_write_mac_address(bgmac, (u8 *)addr); 1223 eth_commit_mac_addr_change(net_dev, addr); 1224 return 0; 1225 } 1226 1227 static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1228 { 1229 struct bgmac *bgmac = netdev_priv(net_dev); 1230 struct mii_ioctl_data *data = if_mii(ifr); 1231 1232 switch (cmd) { 1233 case SIOCGMIIPHY: 1234 data->phy_id = bgmac->phyaddr; 1235 /* fallthru */ 1236 case SIOCGMIIREG: 1237 if (!netif_running(net_dev)) 1238 return -EAGAIN; 1239 data->val_out = bgmac_phy_read(bgmac, data->phy_id, 1240 data->reg_num & 0x1f); 1241 return 0; 1242 case SIOCSMIIREG: 1243 if (!netif_running(net_dev)) 1244 return -EAGAIN; 1245 bgmac_phy_write(bgmac, data->phy_id, data->reg_num & 0x1f, 1246 data->val_in); 1247 return 0; 1248 default: 1249 return -EOPNOTSUPP; 1250 } 1251 } 1252 1253 static const struct net_device_ops bgmac_netdev_ops = { 1254 .ndo_open = bgmac_open, 1255 .ndo_stop = bgmac_stop, 1256 .ndo_start_xmit = bgmac_start_xmit, 1257 .ndo_set_rx_mode = bgmac_set_rx_mode, 1258 .ndo_set_mac_address = bgmac_set_mac_address, 1259 .ndo_validate_addr = eth_validate_addr, 1260 .ndo_do_ioctl = bgmac_ioctl, 1261 }; 1262 1263 /************************************************** 1264 * ethtool_ops 1265 **************************************************/ 1266 1267 static int bgmac_get_settings(struct net_device *net_dev, 1268 struct ethtool_cmd *cmd) 1269 { 1270 struct bgmac *bgmac = netdev_priv(net_dev); 1271 1272 cmd->supported = SUPPORTED_10baseT_Half | 1273 SUPPORTED_10baseT_Full | 1274 SUPPORTED_100baseT_Half | 1275 SUPPORTED_100baseT_Full | 1276 SUPPORTED_1000baseT_Half | 1277 SUPPORTED_1000baseT_Full | 1278 SUPPORTED_Autoneg; 1279 1280 if (bgmac->autoneg) { 1281 WARN_ON(cmd->advertising); 1282 if (bgmac->full_duplex) { 1283 if (bgmac->speed & BGMAC_SPEED_10) 1284 cmd->advertising |= ADVERTISED_10baseT_Full; 1285 if (bgmac->speed & BGMAC_SPEED_100) 1286 cmd->advertising |= ADVERTISED_100baseT_Full; 1287 if (bgmac->speed & BGMAC_SPEED_1000) 1288 cmd->advertising |= ADVERTISED_1000baseT_Full; 1289 } else { 1290 if (bgmac->speed & BGMAC_SPEED_10) 1291 cmd->advertising |= ADVERTISED_10baseT_Half; 1292 if (bgmac->speed & BGMAC_SPEED_100) 1293 cmd->advertising |= ADVERTISED_100baseT_Half; 1294 if (bgmac->speed & BGMAC_SPEED_1000) 1295 cmd->advertising |= ADVERTISED_1000baseT_Half; 1296 } 1297 } else { 1298 switch (bgmac->speed) { 1299 case BGMAC_SPEED_10: 1300 ethtool_cmd_speed_set(cmd, SPEED_10); 1301 break; 1302 case BGMAC_SPEED_100: 1303 ethtool_cmd_speed_set(cmd, SPEED_100); 1304 break; 1305 case BGMAC_SPEED_1000: 1306 ethtool_cmd_speed_set(cmd, SPEED_1000); 1307 break; 1308 } 1309 } 1310 1311 cmd->duplex = bgmac->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; 1312 1313 cmd->autoneg = bgmac->autoneg; 1314 1315 return 0; 1316 } 1317 1318 #if 0 1319 static int bgmac_set_settings(struct net_device *net_dev, 1320 struct ethtool_cmd *cmd) 1321 { 1322 struct bgmac *bgmac = netdev_priv(net_dev); 1323 1324 return -1; 1325 } 1326 #endif 1327 1328 static void bgmac_get_drvinfo(struct net_device *net_dev, 1329 struct ethtool_drvinfo *info) 1330 { 1331 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 1332 strlcpy(info->bus_info, "BCMA", sizeof(info->bus_info)); 1333 } 1334 1335 static const struct ethtool_ops bgmac_ethtool_ops = { 1336 .get_settings = bgmac_get_settings, 1337 .get_drvinfo = bgmac_get_drvinfo, 1338 }; 1339 1340 /************************************************** 1341 * MII 1342 **************************************************/ 1343 1344 static int bgmac_mii_read(struct mii_bus *bus, int mii_id, int regnum) 1345 { 1346 return bgmac_phy_read(bus->priv, mii_id, regnum); 1347 } 1348 1349 static int bgmac_mii_write(struct mii_bus *bus, int mii_id, int regnum, 1350 u16 value) 1351 { 1352 return bgmac_phy_write(bus->priv, mii_id, regnum, value); 1353 } 1354 1355 static int bgmac_mii_register(struct bgmac *bgmac) 1356 { 1357 struct mii_bus *mii_bus; 1358 int i, err = 0; 1359 1360 mii_bus = mdiobus_alloc(); 1361 if (!mii_bus) 1362 return -ENOMEM; 1363 1364 mii_bus->name = "bgmac mii bus"; 1365 sprintf(mii_bus->id, "%s-%d-%d", "bgmac", bgmac->core->bus->num, 1366 bgmac->core->core_unit); 1367 mii_bus->priv = bgmac; 1368 mii_bus->read = bgmac_mii_read; 1369 mii_bus->write = bgmac_mii_write; 1370 mii_bus->parent = &bgmac->core->dev; 1371 mii_bus->phy_mask = ~(1 << bgmac->phyaddr); 1372 1373 mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL); 1374 if (!mii_bus->irq) { 1375 err = -ENOMEM; 1376 goto err_free_bus; 1377 } 1378 for (i = 0; i < PHY_MAX_ADDR; i++) 1379 mii_bus->irq[i] = PHY_POLL; 1380 1381 err = mdiobus_register(mii_bus); 1382 if (err) { 1383 bgmac_err(bgmac, "Registration of mii bus failed\n"); 1384 goto err_free_irq; 1385 } 1386 1387 bgmac->mii_bus = mii_bus; 1388 1389 return err; 1390 1391 err_free_irq: 1392 kfree(mii_bus->irq); 1393 err_free_bus: 1394 mdiobus_free(mii_bus); 1395 return err; 1396 } 1397 1398 static void bgmac_mii_unregister(struct bgmac *bgmac) 1399 { 1400 struct mii_bus *mii_bus = bgmac->mii_bus; 1401 1402 mdiobus_unregister(mii_bus); 1403 kfree(mii_bus->irq); 1404 mdiobus_free(mii_bus); 1405 } 1406 1407 /************************************************** 1408 * BCMA bus ops 1409 **************************************************/ 1410 1411 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */ 1412 static int bgmac_probe(struct bcma_device *core) 1413 { 1414 struct net_device *net_dev; 1415 struct bgmac *bgmac; 1416 struct ssb_sprom *sprom = &core->bus->sprom; 1417 u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac; 1418 int err; 1419 1420 /* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */ 1421 if (core->core_unit > 1) { 1422 pr_err("Unsupported core_unit %d\n", core->core_unit); 1423 return -ENOTSUPP; 1424 } 1425 1426 if (!is_valid_ether_addr(mac)) { 1427 dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac); 1428 eth_random_addr(mac); 1429 dev_warn(&core->dev, "Using random MAC: %pM\n", mac); 1430 } 1431 1432 /* Allocation and references */ 1433 net_dev = alloc_etherdev(sizeof(*bgmac)); 1434 if (!net_dev) 1435 return -ENOMEM; 1436 net_dev->netdev_ops = &bgmac_netdev_ops; 1437 net_dev->irq = core->irq; 1438 SET_ETHTOOL_OPS(net_dev, &bgmac_ethtool_ops); 1439 bgmac = netdev_priv(net_dev); 1440 bgmac->net_dev = net_dev; 1441 bgmac->core = core; 1442 bcma_set_drvdata(core, bgmac); 1443 1444 /* Defaults */ 1445 bgmac->autoneg = true; 1446 bgmac->full_duplex = true; 1447 bgmac->speed = BGMAC_SPEED_10 | BGMAC_SPEED_100 | BGMAC_SPEED_1000; 1448 memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN); 1449 1450 /* On BCM4706 we need common core to access PHY */ 1451 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 1452 !core->bus->drv_gmac_cmn.core) { 1453 bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n"); 1454 err = -ENODEV; 1455 goto err_netdev_free; 1456 } 1457 bgmac->cmn = core->bus->drv_gmac_cmn.core; 1458 1459 bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr : 1460 sprom->et0phyaddr; 1461 bgmac->phyaddr &= BGMAC_PHY_MASK; 1462 if (bgmac->phyaddr == BGMAC_PHY_MASK) { 1463 bgmac_err(bgmac, "No PHY found\n"); 1464 err = -ENODEV; 1465 goto err_netdev_free; 1466 } 1467 bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr, 1468 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : ""); 1469 1470 if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) { 1471 bgmac_err(bgmac, "PCI setup not implemented\n"); 1472 err = -ENOTSUPP; 1473 goto err_netdev_free; 1474 } 1475 1476 bgmac_chip_reset(bgmac); 1477 1478 err = bgmac_dma_alloc(bgmac); 1479 if (err) { 1480 bgmac_err(bgmac, "Unable to alloc memory for DMA\n"); 1481 goto err_netdev_free; 1482 } 1483 1484 bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK; 1485 if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0) 1486 bgmac->int_mask &= ~BGMAC_IS_TX_MASK; 1487 1488 /* TODO: reset the external phy. Specs are needed */ 1489 bgmac_phy_reset(bgmac); 1490 1491 bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo & 1492 BGMAC_BFL_ENETROBO); 1493 if (bgmac->has_robosw) 1494 bgmac_warn(bgmac, "Support for Roboswitch not implemented\n"); 1495 1496 if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM) 1497 bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n"); 1498 1499 err = bgmac_mii_register(bgmac); 1500 if (err) { 1501 bgmac_err(bgmac, "Cannot register MDIO\n"); 1502 err = -ENOTSUPP; 1503 goto err_dma_free; 1504 } 1505 1506 err = register_netdev(bgmac->net_dev); 1507 if (err) { 1508 bgmac_err(bgmac, "Cannot register net device\n"); 1509 err = -ENOTSUPP; 1510 goto err_mii_unregister; 1511 } 1512 1513 netif_carrier_off(net_dev); 1514 1515 netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT); 1516 1517 return 0; 1518 1519 err_mii_unregister: 1520 bgmac_mii_unregister(bgmac); 1521 err_dma_free: 1522 bgmac_dma_free(bgmac); 1523 1524 err_netdev_free: 1525 bcma_set_drvdata(core, NULL); 1526 free_netdev(net_dev); 1527 1528 return err; 1529 } 1530 1531 static void bgmac_remove(struct bcma_device *core) 1532 { 1533 struct bgmac *bgmac = bcma_get_drvdata(core); 1534 1535 netif_napi_del(&bgmac->napi); 1536 unregister_netdev(bgmac->net_dev); 1537 bgmac_mii_unregister(bgmac); 1538 bgmac_dma_free(bgmac); 1539 bcma_set_drvdata(core, NULL); 1540 free_netdev(bgmac->net_dev); 1541 } 1542 1543 static struct bcma_driver bgmac_bcma_driver = { 1544 .name = KBUILD_MODNAME, 1545 .id_table = bgmac_bcma_tbl, 1546 .probe = bgmac_probe, 1547 .remove = bgmac_remove, 1548 }; 1549 1550 static int __init bgmac_init(void) 1551 { 1552 int err; 1553 1554 err = bcma_driver_register(&bgmac_bcma_driver); 1555 if (err) 1556 return err; 1557 pr_info("Broadcom 47xx GBit MAC driver loaded\n"); 1558 1559 return 0; 1560 } 1561 1562 static void __exit bgmac_exit(void) 1563 { 1564 bcma_driver_unregister(&bgmac_bcma_driver); 1565 } 1566 1567 module_init(bgmac_init) 1568 module_exit(bgmac_exit) 1569 1570 MODULE_AUTHOR("Rafał Miłecki"); 1571 MODULE_LICENSE("GPL"); 1572