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/interrupt.h> 17 #include <linux/dma-mapping.h> 18 #include <asm/mach-bcm47xx/nvram.h> 19 20 static const struct bcma_device_id bgmac_bcma_tbl[] = { 21 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS), 22 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS), 23 BCMA_CORETABLE_END 24 }; 25 MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl); 26 27 static bool bgmac_wait_value(struct bcma_device *core, u16 reg, u32 mask, 28 u32 value, int timeout) 29 { 30 u32 val; 31 int i; 32 33 for (i = 0; i < timeout / 10; i++) { 34 val = bcma_read32(core, reg); 35 if ((val & mask) == value) 36 return true; 37 udelay(10); 38 } 39 pr_err("Timeout waiting for reg 0x%X\n", reg); 40 return false; 41 } 42 43 /************************************************** 44 * DMA 45 **************************************************/ 46 47 static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 48 { 49 u32 val; 50 int i; 51 52 if (!ring->mmio_base) 53 return; 54 55 /* Suspend DMA TX ring first. 56 * bgmac_wait_value doesn't support waiting for any of few values, so 57 * implement whole loop here. 58 */ 59 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 60 BGMAC_DMA_TX_SUSPEND); 61 for (i = 0; i < 10000 / 10; i++) { 62 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 63 val &= BGMAC_DMA_TX_STAT; 64 if (val == BGMAC_DMA_TX_STAT_DISABLED || 65 val == BGMAC_DMA_TX_STAT_IDLEWAIT || 66 val == BGMAC_DMA_TX_STAT_STOPPED) { 67 i = 0; 68 break; 69 } 70 udelay(10); 71 } 72 if (i) 73 bgmac_err(bgmac, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n", 74 ring->mmio_base, val); 75 76 /* Remove SUSPEND bit */ 77 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0); 78 if (!bgmac_wait_value(bgmac->core, 79 ring->mmio_base + BGMAC_DMA_TX_STATUS, 80 BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED, 81 10000)) { 82 bgmac_warn(bgmac, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n", 83 ring->mmio_base); 84 udelay(300); 85 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 86 if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED) 87 bgmac_err(bgmac, "Reset of DMA TX ring 0x%X failed\n", 88 ring->mmio_base); 89 } 90 } 91 92 static void bgmac_dma_tx_enable(struct bgmac *bgmac, 93 struct bgmac_dma_ring *ring) 94 { 95 u32 ctl; 96 97 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL); 98 ctl |= BGMAC_DMA_TX_ENABLE; 99 ctl |= BGMAC_DMA_TX_PARITY_DISABLE; 100 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl); 101 } 102 103 static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac, 104 struct bgmac_dma_ring *ring, 105 struct sk_buff *skb) 106 { 107 struct device *dma_dev = bgmac->core->dma_dev; 108 struct net_device *net_dev = bgmac->net_dev; 109 struct bgmac_dma_desc *dma_desc; 110 struct bgmac_slot_info *slot; 111 u32 ctl0, ctl1; 112 int free_slots; 113 114 if (skb->len > BGMAC_DESC_CTL1_LEN) { 115 bgmac_err(bgmac, "Too long skb (%d)\n", skb->len); 116 goto err_stop_drop; 117 } 118 119 if (ring->start <= ring->end) 120 free_slots = ring->start - ring->end + BGMAC_TX_RING_SLOTS; 121 else 122 free_slots = ring->start - ring->end; 123 if (free_slots == 1) { 124 bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n"); 125 netif_stop_queue(net_dev); 126 return NETDEV_TX_BUSY; 127 } 128 129 slot = &ring->slots[ring->end]; 130 slot->skb = skb; 131 slot->dma_addr = dma_map_single(dma_dev, skb->data, skb->len, 132 DMA_TO_DEVICE); 133 if (dma_mapping_error(dma_dev, slot->dma_addr)) { 134 bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n", 135 ring->mmio_base); 136 goto err_stop_drop; 137 } 138 139 ctl0 = BGMAC_DESC_CTL0_IOC | BGMAC_DESC_CTL0_SOF | BGMAC_DESC_CTL0_EOF; 140 if (ring->end == ring->num_slots - 1) 141 ctl0 |= BGMAC_DESC_CTL0_EOT; 142 ctl1 = skb->len & BGMAC_DESC_CTL1_LEN; 143 144 dma_desc = ring->cpu_base; 145 dma_desc += ring->end; 146 dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr)); 147 dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr)); 148 dma_desc->ctl0 = cpu_to_le32(ctl0); 149 dma_desc->ctl1 = cpu_to_le32(ctl1); 150 151 wmb(); 152 153 /* Increase ring->end to point empty slot. We tell hardware the first 154 * slot it should *not* read. 155 */ 156 if (++ring->end >= BGMAC_TX_RING_SLOTS) 157 ring->end = 0; 158 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX, 159 ring->end * sizeof(struct bgmac_dma_desc)); 160 161 /* Always keep one slot free to allow detecting bugged calls. */ 162 if (--free_slots == 1) 163 netif_stop_queue(net_dev); 164 165 return NETDEV_TX_OK; 166 167 err_stop_drop: 168 netif_stop_queue(net_dev); 169 dev_kfree_skb(skb); 170 return NETDEV_TX_OK; 171 } 172 173 /* Free transmitted packets */ 174 static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 175 { 176 struct device *dma_dev = bgmac->core->dma_dev; 177 int empty_slot; 178 bool freed = false; 179 180 /* The last slot that hardware didn't consume yet */ 181 empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 182 empty_slot &= BGMAC_DMA_TX_STATDPTR; 183 empty_slot /= sizeof(struct bgmac_dma_desc); 184 185 while (ring->start != empty_slot) { 186 struct bgmac_slot_info *slot = &ring->slots[ring->start]; 187 188 if (slot->skb) { 189 /* Unmap no longer used buffer */ 190 dma_unmap_single(dma_dev, slot->dma_addr, 191 slot->skb->len, DMA_TO_DEVICE); 192 slot->dma_addr = 0; 193 194 /* Free memory! :) */ 195 dev_kfree_skb(slot->skb); 196 slot->skb = NULL; 197 } else { 198 bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n", 199 ring->start, ring->end); 200 } 201 202 if (++ring->start >= BGMAC_TX_RING_SLOTS) 203 ring->start = 0; 204 freed = true; 205 } 206 207 if (freed && netif_queue_stopped(bgmac->net_dev)) 208 netif_wake_queue(bgmac->net_dev); 209 } 210 211 static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 212 { 213 if (!ring->mmio_base) 214 return; 215 216 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0); 217 if (!bgmac_wait_value(bgmac->core, 218 ring->mmio_base + BGMAC_DMA_RX_STATUS, 219 BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED, 220 10000)) 221 bgmac_err(bgmac, "Reset of ring 0x%X RX failed\n", 222 ring->mmio_base); 223 } 224 225 static void bgmac_dma_rx_enable(struct bgmac *bgmac, 226 struct bgmac_dma_ring *ring) 227 { 228 u32 ctl; 229 230 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL); 231 ctl &= BGMAC_DMA_RX_ADDREXT_MASK; 232 ctl |= BGMAC_DMA_RX_ENABLE; 233 ctl |= BGMAC_DMA_RX_PARITY_DISABLE; 234 ctl |= BGMAC_DMA_RX_OVERFLOW_CONT; 235 ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT; 236 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl); 237 } 238 239 static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac, 240 struct bgmac_slot_info *slot) 241 { 242 struct device *dma_dev = bgmac->core->dma_dev; 243 struct bgmac_rx_header *rx; 244 245 /* Alloc skb */ 246 slot->skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE); 247 if (!slot->skb) { 248 bgmac_err(bgmac, "Allocation of skb failed!\n"); 249 return -ENOMEM; 250 } 251 252 /* Poison - if everything goes fine, hardware will overwrite it */ 253 rx = (struct bgmac_rx_header *)slot->skb->data; 254 rx->len = cpu_to_le16(0xdead); 255 rx->flags = cpu_to_le16(0xbeef); 256 257 /* Map skb for the DMA */ 258 slot->dma_addr = dma_map_single(dma_dev, slot->skb->data, 259 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 260 if (dma_mapping_error(dma_dev, slot->dma_addr)) { 261 bgmac_err(bgmac, "DMA mapping error\n"); 262 return -ENOMEM; 263 } 264 if (slot->dma_addr & 0xC0000000) 265 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 266 267 return 0; 268 } 269 270 static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, 271 int weight) 272 { 273 u32 end_slot; 274 int handled = 0; 275 276 end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS); 277 end_slot &= BGMAC_DMA_RX_STATDPTR; 278 end_slot /= sizeof(struct bgmac_dma_desc); 279 280 ring->end = end_slot; 281 282 while (ring->start != ring->end) { 283 struct device *dma_dev = bgmac->core->dma_dev; 284 struct bgmac_slot_info *slot = &ring->slots[ring->start]; 285 struct sk_buff *skb = slot->skb; 286 struct sk_buff *new_skb; 287 struct bgmac_rx_header *rx; 288 u16 len, flags; 289 290 /* Unmap buffer to make it accessible to the CPU */ 291 dma_sync_single_for_cpu(dma_dev, slot->dma_addr, 292 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 293 294 /* Get info from the header */ 295 rx = (struct bgmac_rx_header *)skb->data; 296 len = le16_to_cpu(rx->len); 297 flags = le16_to_cpu(rx->flags); 298 299 /* Check for poison and drop or pass the packet */ 300 if (len == 0xdead && flags == 0xbeef) { 301 bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n", 302 ring->start); 303 } else { 304 new_skb = netdev_alloc_skb(bgmac->net_dev, len); 305 if (new_skb) { 306 skb_put(new_skb, len); 307 skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET, 308 new_skb->data, 309 len); 310 new_skb->protocol = 311 eth_type_trans(new_skb, bgmac->net_dev); 312 netif_receive_skb(new_skb); 313 handled++; 314 } else { 315 bgmac->net_dev->stats.rx_dropped++; 316 bgmac_err(bgmac, "Allocation of skb for copying packet failed!\n"); 317 } 318 319 /* Poison the old skb */ 320 rx->len = cpu_to_le16(0xdead); 321 rx->flags = cpu_to_le16(0xbeef); 322 } 323 324 /* Make it back accessible to the hardware */ 325 dma_sync_single_for_device(dma_dev, slot->dma_addr, 326 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 327 328 if (++ring->start >= BGMAC_RX_RING_SLOTS) 329 ring->start = 0; 330 331 if (handled >= weight) /* Should never be greater */ 332 break; 333 } 334 335 return handled; 336 } 337 338 /* Does ring support unaligned addressing? */ 339 static bool bgmac_dma_unaligned(struct bgmac *bgmac, 340 struct bgmac_dma_ring *ring, 341 enum bgmac_dma_ring_type ring_type) 342 { 343 switch (ring_type) { 344 case BGMAC_DMA_RING_TX: 345 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 346 0xff0); 347 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO)) 348 return true; 349 break; 350 case BGMAC_DMA_RING_RX: 351 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 352 0xff0); 353 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO)) 354 return true; 355 break; 356 } 357 return false; 358 } 359 360 static void bgmac_dma_ring_free(struct bgmac *bgmac, 361 struct bgmac_dma_ring *ring) 362 { 363 struct device *dma_dev = bgmac->core->dma_dev; 364 struct bgmac_slot_info *slot; 365 int size; 366 int i; 367 368 for (i = 0; i < ring->num_slots; i++) { 369 slot = &ring->slots[i]; 370 if (slot->skb) { 371 if (slot->dma_addr) 372 dma_unmap_single(dma_dev, slot->dma_addr, 373 slot->skb->len, DMA_TO_DEVICE); 374 dev_kfree_skb(slot->skb); 375 } 376 } 377 378 if (ring->cpu_base) { 379 /* Free ring of descriptors */ 380 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 381 dma_free_coherent(dma_dev, size, ring->cpu_base, 382 ring->dma_base); 383 } 384 } 385 386 static void bgmac_dma_free(struct bgmac *bgmac) 387 { 388 int i; 389 390 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 391 bgmac_dma_ring_free(bgmac, &bgmac->tx_ring[i]); 392 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 393 bgmac_dma_ring_free(bgmac, &bgmac->rx_ring[i]); 394 } 395 396 static int bgmac_dma_alloc(struct bgmac *bgmac) 397 { 398 struct device *dma_dev = bgmac->core->dma_dev; 399 struct bgmac_dma_ring *ring; 400 static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1, 401 BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, }; 402 int size; /* ring size: different for Tx and Rx */ 403 int err; 404 int i; 405 406 BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base)); 407 BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base)); 408 409 if (!(bcma_aread32(bgmac->core, BCMA_IOST) & BCMA_IOST_DMA64)) { 410 bgmac_err(bgmac, "Core does not report 64-bit DMA\n"); 411 return -ENOTSUPP; 412 } 413 414 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 415 ring = &bgmac->tx_ring[i]; 416 ring->num_slots = BGMAC_TX_RING_SLOTS; 417 ring->mmio_base = ring_base[i]; 418 if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_TX)) 419 bgmac_warn(bgmac, "TX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", 420 ring->mmio_base); 421 422 /* Alloc ring of descriptors */ 423 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 424 ring->cpu_base = dma_zalloc_coherent(dma_dev, size, 425 &ring->dma_base, 426 GFP_KERNEL); 427 if (!ring->cpu_base) { 428 bgmac_err(bgmac, "Allocation of TX ring 0x%X failed\n", 429 ring->mmio_base); 430 goto err_dma_free; 431 } 432 if (ring->dma_base & 0xC0000000) 433 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 434 435 /* No need to alloc TX slots yet */ 436 } 437 438 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 439 ring = &bgmac->rx_ring[i]; 440 ring->num_slots = BGMAC_RX_RING_SLOTS; 441 ring->mmio_base = ring_base[i]; 442 if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_RX)) 443 bgmac_warn(bgmac, "RX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", 444 ring->mmio_base); 445 446 /* Alloc ring of descriptors */ 447 size = ring->num_slots * sizeof(struct bgmac_dma_desc); 448 ring->cpu_base = dma_zalloc_coherent(dma_dev, size, 449 &ring->dma_base, 450 GFP_KERNEL); 451 if (!ring->cpu_base) { 452 bgmac_err(bgmac, "Allocation of RX ring 0x%X failed\n", 453 ring->mmio_base); 454 err = -ENOMEM; 455 goto err_dma_free; 456 } 457 if (ring->dma_base & 0xC0000000) 458 bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); 459 460 /* Alloc RX slots */ 461 for (i = 0; i < ring->num_slots; i++) { 462 err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[i]); 463 if (err) { 464 bgmac_err(bgmac, "Can't allocate skb for slot in RX ring\n"); 465 goto err_dma_free; 466 } 467 } 468 } 469 470 return 0; 471 472 err_dma_free: 473 bgmac_dma_free(bgmac); 474 return -ENOMEM; 475 } 476 477 static void bgmac_dma_init(struct bgmac *bgmac) 478 { 479 struct bgmac_dma_ring *ring; 480 struct bgmac_dma_desc *dma_desc; 481 u32 ctl0, ctl1; 482 int i; 483 484 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 485 ring = &bgmac->tx_ring[i]; 486 487 /* We don't implement unaligned addressing, so enable first */ 488 bgmac_dma_tx_enable(bgmac, ring); 489 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 490 lower_32_bits(ring->dma_base)); 491 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI, 492 upper_32_bits(ring->dma_base)); 493 494 ring->start = 0; 495 ring->end = 0; /* Points the slot that should *not* be read */ 496 } 497 498 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 499 ring = &bgmac->rx_ring[i]; 500 501 /* We don't implement unaligned addressing, so enable first */ 502 bgmac_dma_rx_enable(bgmac, ring); 503 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 504 lower_32_bits(ring->dma_base)); 505 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI, 506 upper_32_bits(ring->dma_base)); 507 508 for (i = 0, dma_desc = ring->cpu_base; i < ring->num_slots; 509 i++, dma_desc++) { 510 ctl0 = ctl1 = 0; 511 512 if (i == ring->num_slots - 1) 513 ctl0 |= BGMAC_DESC_CTL0_EOT; 514 ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN; 515 /* Is there any BGMAC device that requires extension? */ 516 /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) & 517 * B43_DMA64_DCTL1_ADDREXT_MASK; 518 */ 519 520 dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[i].dma_addr)); 521 dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[i].dma_addr)); 522 dma_desc->ctl0 = cpu_to_le32(ctl0); 523 dma_desc->ctl1 = cpu_to_le32(ctl1); 524 } 525 526 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, 527 ring->num_slots * sizeof(struct bgmac_dma_desc)); 528 529 ring->start = 0; 530 ring->end = 0; 531 } 532 } 533 534 /************************************************** 535 * PHY ops 536 **************************************************/ 537 538 u16 bgmac_phy_read(struct bgmac *bgmac, u8 phyaddr, u8 reg) 539 { 540 struct bcma_device *core; 541 u16 phy_access_addr; 542 u16 phy_ctl_addr; 543 u32 tmp; 544 545 BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK); 546 BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK); 547 BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT); 548 BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK); 549 BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT); 550 BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE); 551 BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START); 552 BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK); 553 BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK); 554 BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT); 555 BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE); 556 557 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { 558 core = bgmac->core->bus->drv_gmac_cmn.core; 559 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; 560 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; 561 } else { 562 core = bgmac->core; 563 phy_access_addr = BGMAC_PHY_ACCESS; 564 phy_ctl_addr = BGMAC_PHY_CNTL; 565 } 566 567 tmp = bcma_read32(core, phy_ctl_addr); 568 tmp &= ~BGMAC_PC_EPA_MASK; 569 tmp |= phyaddr; 570 bcma_write32(core, phy_ctl_addr, tmp); 571 572 tmp = BGMAC_PA_START; 573 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; 574 tmp |= reg << BGMAC_PA_REG_SHIFT; 575 bcma_write32(core, phy_access_addr, tmp); 576 577 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) { 578 bgmac_err(bgmac, "Reading PHY %d register 0x%X failed\n", 579 phyaddr, reg); 580 return 0xffff; 581 } 582 583 return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK; 584 } 585 586 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */ 587 void bgmac_phy_write(struct bgmac *bgmac, u8 phyaddr, u8 reg, u16 value) 588 { 589 struct bcma_device *core; 590 u16 phy_access_addr; 591 u16 phy_ctl_addr; 592 u32 tmp; 593 594 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { 595 core = bgmac->core->bus->drv_gmac_cmn.core; 596 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; 597 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; 598 } else { 599 core = bgmac->core; 600 phy_access_addr = BGMAC_PHY_ACCESS; 601 phy_ctl_addr = BGMAC_PHY_CNTL; 602 } 603 604 tmp = bcma_read32(core, phy_ctl_addr); 605 tmp &= ~BGMAC_PC_EPA_MASK; 606 tmp |= phyaddr; 607 bcma_write32(core, phy_ctl_addr, tmp); 608 609 bgmac_write(bgmac, BGMAC_INT_STATUS, BGMAC_IS_MDIO); 610 if (bgmac_read(bgmac, BGMAC_INT_STATUS) & BGMAC_IS_MDIO) 611 bgmac_warn(bgmac, "Error setting MDIO int\n"); 612 613 tmp = BGMAC_PA_START; 614 tmp |= BGMAC_PA_WRITE; 615 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; 616 tmp |= reg << BGMAC_PA_REG_SHIFT; 617 tmp |= value; 618 bcma_write32(core, phy_access_addr, tmp); 619 620 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) 621 bgmac_err(bgmac, "Writing to PHY %d register 0x%X failed\n", 622 phyaddr, reg); 623 } 624 625 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyforce */ 626 static void bgmac_phy_force(struct bgmac *bgmac) 627 { 628 u16 ctl; 629 u16 mask = ~(BGMAC_PHY_CTL_SPEED | BGMAC_PHY_CTL_SPEED_MSB | 630 BGMAC_PHY_CTL_ANENAB | BGMAC_PHY_CTL_DUPLEX); 631 632 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 633 return; 634 635 if (bgmac->autoneg) 636 return; 637 638 ctl = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL); 639 ctl &= mask; 640 if (bgmac->full_duplex) 641 ctl |= BGMAC_PHY_CTL_DUPLEX; 642 if (bgmac->speed == BGMAC_SPEED_100) 643 ctl |= BGMAC_PHY_CTL_SPEED_100; 644 else if (bgmac->speed == BGMAC_SPEED_1000) 645 ctl |= BGMAC_PHY_CTL_SPEED_1000; 646 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, ctl); 647 } 648 649 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyadvertise */ 650 static void bgmac_phy_advertise(struct bgmac *bgmac) 651 { 652 u16 adv; 653 654 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 655 return; 656 657 if (!bgmac->autoneg) 658 return; 659 660 /* Adv selected 10/100 speeds */ 661 adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV); 662 adv &= ~(BGMAC_PHY_ADV_10HALF | BGMAC_PHY_ADV_10FULL | 663 BGMAC_PHY_ADV_100HALF | BGMAC_PHY_ADV_100FULL); 664 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) 665 adv |= BGMAC_PHY_ADV_10HALF; 666 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) 667 adv |= BGMAC_PHY_ADV_100HALF; 668 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) 669 adv |= BGMAC_PHY_ADV_10FULL; 670 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) 671 adv |= BGMAC_PHY_ADV_100FULL; 672 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV, adv); 673 674 /* Adv selected 1000 speeds */ 675 adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2); 676 adv &= ~(BGMAC_PHY_ADV2_1000HALF | BGMAC_PHY_ADV2_1000FULL); 677 if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) 678 adv |= BGMAC_PHY_ADV2_1000HALF; 679 if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) 680 adv |= BGMAC_PHY_ADV2_1000FULL; 681 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2, adv); 682 683 /* Restart */ 684 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, 685 bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) | 686 BGMAC_PHY_CTL_RESTART); 687 } 688 689 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */ 690 static void bgmac_phy_init(struct bgmac *bgmac) 691 { 692 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; 693 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; 694 u8 i; 695 696 if (ci->id == BCMA_CHIP_ID_BCM5356) { 697 for (i = 0; i < 5; i++) { 698 bgmac_phy_write(bgmac, i, 0x1f, 0x008b); 699 bgmac_phy_write(bgmac, i, 0x15, 0x0100); 700 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 701 bgmac_phy_write(bgmac, i, 0x12, 0x2aaa); 702 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 703 } 704 } 705 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) || 706 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) || 707 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) { 708 bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0); 709 bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0); 710 for (i = 0; i < 5; i++) { 711 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 712 bgmac_phy_write(bgmac, i, 0x16, 0x5284); 713 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 714 bgmac_phy_write(bgmac, i, 0x17, 0x0010); 715 bgmac_phy_write(bgmac, i, 0x1f, 0x000f); 716 bgmac_phy_write(bgmac, i, 0x16, 0x5296); 717 bgmac_phy_write(bgmac, i, 0x17, 0x1073); 718 bgmac_phy_write(bgmac, i, 0x17, 0x9073); 719 bgmac_phy_write(bgmac, i, 0x16, 0x52b6); 720 bgmac_phy_write(bgmac, i, 0x17, 0x9273); 721 bgmac_phy_write(bgmac, i, 0x1f, 0x000b); 722 } 723 } 724 } 725 726 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */ 727 static void bgmac_phy_reset(struct bgmac *bgmac) 728 { 729 if (bgmac->phyaddr == BGMAC_PHY_NOREGS) 730 return; 731 732 bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, 733 BGMAC_PHY_CTL_RESET); 734 udelay(100); 735 if (bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) & 736 BGMAC_PHY_CTL_RESET) 737 bgmac_err(bgmac, "PHY reset failed\n"); 738 bgmac_phy_init(bgmac); 739 } 740 741 /************************************************** 742 * Chip ops 743 **************************************************/ 744 745 /* TODO: can we just drop @force? Can we don't reset MAC at all if there is 746 * nothing to change? Try if after stabilizng driver. 747 */ 748 static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set, 749 bool force) 750 { 751 u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 752 u32 new_val = (cmdcfg & mask) | set; 753 754 bgmac_set(bgmac, BGMAC_CMDCFG, BGMAC_CMDCFG_SR); 755 udelay(2); 756 757 if (new_val != cmdcfg || force) 758 bgmac_write(bgmac, BGMAC_CMDCFG, new_val); 759 760 bgmac_mask(bgmac, BGMAC_CMDCFG, ~BGMAC_CMDCFG_SR); 761 udelay(2); 762 } 763 764 #if 0 /* We don't use that regs yet */ 765 static void bgmac_chip_stats_update(struct bgmac *bgmac) 766 { 767 int i; 768 769 if (bgmac->core->id.id != BCMA_CORE_4706_MAC_GBIT) { 770 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 771 bgmac->mib_tx_regs[i] = 772 bgmac_read(bgmac, 773 BGMAC_TX_GOOD_OCTETS + (i * 4)); 774 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 775 bgmac->mib_rx_regs[i] = 776 bgmac_read(bgmac, 777 BGMAC_RX_GOOD_OCTETS + (i * 4)); 778 } 779 780 /* TODO: what else? how to handle BCM4706? Specs are needed */ 781 } 782 #endif 783 784 static void bgmac_clear_mib(struct bgmac *bgmac) 785 { 786 int i; 787 788 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) 789 return; 790 791 bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR); 792 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 793 bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4)); 794 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 795 bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4)); 796 } 797 798 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */ 799 static void bgmac_speed(struct bgmac *bgmac, int speed) 800 { 801 u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD); 802 u32 set = 0; 803 804 if (speed & BGMAC_SPEED_10) 805 set |= BGMAC_CMDCFG_ES_10; 806 if (speed & BGMAC_SPEED_100) 807 set |= BGMAC_CMDCFG_ES_100; 808 if (speed & BGMAC_SPEED_1000) 809 set |= BGMAC_CMDCFG_ES_1000; 810 if (!bgmac->full_duplex) 811 set |= BGMAC_CMDCFG_HD; 812 bgmac_cmdcfg_maskset(bgmac, mask, set, true); 813 } 814 815 static void bgmac_miiconfig(struct bgmac *bgmac) 816 { 817 u8 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> 818 BGMAC_DS_MM_SHIFT; 819 if (imode == 0 || imode == 1) { 820 if (bgmac->autoneg) 821 bgmac_speed(bgmac, BGMAC_SPEED_100); 822 else 823 bgmac_speed(bgmac, bgmac->speed); 824 } 825 } 826 827 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */ 828 static void bgmac_chip_reset(struct bgmac *bgmac) 829 { 830 struct bcma_device *core = bgmac->core; 831 struct bcma_bus *bus = core->bus; 832 struct bcma_chipinfo *ci = &bus->chipinfo; 833 u32 flags = 0; 834 u32 iost; 835 int i; 836 837 if (bcma_core_is_enabled(core)) { 838 if (!bgmac->stats_grabbed) { 839 /* bgmac_chip_stats_update(bgmac); */ 840 bgmac->stats_grabbed = true; 841 } 842 843 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 844 bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]); 845 846 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); 847 udelay(1); 848 849 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 850 bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]); 851 852 /* TODO: Clear software multicast filter list */ 853 } 854 855 iost = bcma_aread32(core, BCMA_IOST); 856 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 10) || 857 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) || 858 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) 859 iost &= ~BGMAC_BCMA_IOST_ATTACHED; 860 861 if (iost & BGMAC_BCMA_IOST_ATTACHED) { 862 flags = BGMAC_BCMA_IOCTL_SW_CLKEN; 863 if (!bgmac->has_robosw) 864 flags |= BGMAC_BCMA_IOCTL_SW_RESET; 865 } 866 867 bcma_core_enable(core, flags); 868 869 if (core->id.rev > 2) { 870 bgmac_set(bgmac, BCMA_CLKCTLST, 1 << 8); 871 bgmac_wait_value(bgmac->core, BCMA_CLKCTLST, 1 << 24, 1 << 24, 872 1000); 873 } 874 875 if (ci->id == BCMA_CHIP_ID_BCM5357 || ci->id == BCMA_CHIP_ID_BCM4749 || 876 ci->id == BCMA_CHIP_ID_BCM53572) { 877 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; 878 u8 et_swtype = 0; 879 u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY | 880 BGMAC_CHIPCTL_1_IF_TYPE_RMII; 881 char buf[2]; 882 883 if (nvram_getenv("et_swtype", buf, 1) > 0) { 884 if (kstrtou8(buf, 0, &et_swtype)) 885 bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n", 886 buf); 887 et_swtype &= 0x0f; 888 et_swtype <<= 4; 889 sw_type = et_swtype; 890 } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 9) { 891 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII; 892 } else if (0) { 893 /* TODO */ 894 } 895 bcma_chipco_chipctl_maskset(cc, 1, 896 ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK | 897 BGMAC_CHIPCTL_1_SW_TYPE_MASK), 898 sw_type); 899 } 900 901 if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw) 902 bcma_awrite32(core, BCMA_IOCTL, 903 bcma_aread32(core, BCMA_IOCTL) & 904 ~BGMAC_BCMA_IOCTL_SW_RESET); 905 906 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset 907 * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine 908 * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to 909 * be keps until taking MAC out of the reset. 910 */ 911 bgmac_cmdcfg_maskset(bgmac, 912 ~(BGMAC_CMDCFG_TE | 913 BGMAC_CMDCFG_RE | 914 BGMAC_CMDCFG_RPI | 915 BGMAC_CMDCFG_TAI | 916 BGMAC_CMDCFG_HD | 917 BGMAC_CMDCFG_ML | 918 BGMAC_CMDCFG_CFE | 919 BGMAC_CMDCFG_RL | 920 BGMAC_CMDCFG_RED | 921 BGMAC_CMDCFG_PE | 922 BGMAC_CMDCFG_TPI | 923 BGMAC_CMDCFG_PAD_EN | 924 BGMAC_CMDCFG_PF), 925 BGMAC_CMDCFG_PROM | 926 BGMAC_CMDCFG_NLC | 927 BGMAC_CMDCFG_CFE | 928 BGMAC_CMDCFG_SR, 929 false); 930 931 bgmac_clear_mib(bgmac); 932 if (core->id.id == BCMA_CORE_4706_MAC_GBIT) 933 bcma_maskset32(bgmac->cmn, BCMA_GMAC_CMN_PHY_CTL, ~0, 934 BCMA_GMAC_CMN_PC_MTE); 935 else 936 bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE); 937 bgmac_miiconfig(bgmac); 938 bgmac_phy_init(bgmac); 939 940 bgmac->int_status = 0; 941 } 942 943 static void bgmac_chip_intrs_on(struct bgmac *bgmac) 944 { 945 bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask); 946 } 947 948 static void bgmac_chip_intrs_off(struct bgmac *bgmac) 949 { 950 bgmac_write(bgmac, BGMAC_INT_MASK, 0); 951 } 952 953 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */ 954 static void bgmac_enable(struct bgmac *bgmac) 955 { 956 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; 957 u32 cmdcfg; 958 u32 mode; 959 u32 rxq_ctl; 960 u32 fl_ctl; 961 u16 bp_clk; 962 u8 mdp; 963 964 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 965 bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE), 966 BGMAC_CMDCFG_SR, true); 967 udelay(2); 968 cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE; 969 bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg); 970 971 mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> 972 BGMAC_DS_MM_SHIFT; 973 if (ci->id != BCMA_CHIP_ID_BCM47162 || mode != 0) 974 bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT); 975 if (ci->id == BCMA_CHIP_ID_BCM47162 && mode == 2) 976 bcma_chipco_chipctl_maskset(&bgmac->core->bus->drv_cc, 1, ~0, 977 BGMAC_CHIPCTL_1_RXC_DLL_BYPASS); 978 979 switch (ci->id) { 980 case BCMA_CHIP_ID_BCM5357: 981 case BCMA_CHIP_ID_BCM4749: 982 case BCMA_CHIP_ID_BCM53572: 983 case BCMA_CHIP_ID_BCM4716: 984 case BCMA_CHIP_ID_BCM47162: 985 fl_ctl = 0x03cb04cb; 986 if (ci->id == BCMA_CHIP_ID_BCM5357 || 987 ci->id == BCMA_CHIP_ID_BCM4749 || 988 ci->id == BCMA_CHIP_ID_BCM53572) 989 fl_ctl = 0x2300e1; 990 bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl); 991 bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff); 992 break; 993 } 994 995 rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL); 996 rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK; 997 bp_clk = bcma_pmu_get_bus_clock(&bgmac->core->bus->drv_cc) / 1000000; 998 mdp = (bp_clk * 128 / 1000) - 3; 999 rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT); 1000 bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl); 1001 } 1002 1003 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */ 1004 static void bgmac_chip_init(struct bgmac *bgmac, bool full_init) 1005 { 1006 struct bgmac_dma_ring *ring; 1007 u8 *mac = bgmac->net_dev->dev_addr; 1008 u32 tmp; 1009 int i; 1010 1011 /* 1 interrupt per received frame */ 1012 bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT); 1013 1014 /* Enable 802.3x tx flow control (honor received PAUSE frames) */ 1015 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true); 1016 1017 if (bgmac->net_dev->flags & IFF_PROMISC) 1018 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, false); 1019 else 1020 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, false); 1021 1022 /* Set MAC addr */ 1023 tmp = (mac[0] << 24) | (mac[1] << 16) | (mac[2] << 8) | mac[3]; 1024 bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp); 1025 tmp = (mac[4] << 8) | mac[5]; 1026 bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp); 1027 1028 if (bgmac->loopback) 1029 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, true); 1030 else 1031 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, true); 1032 1033 bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN); 1034 1035 if (!bgmac->autoneg) { 1036 bgmac_speed(bgmac, bgmac->speed); 1037 bgmac_phy_force(bgmac); 1038 } else if (bgmac->speed) { /* if there is anything to adv */ 1039 bgmac_phy_advertise(bgmac); 1040 } 1041 1042 if (full_init) { 1043 bgmac_dma_init(bgmac); 1044 if (1) /* FIXME: is there any case we don't want IRQs? */ 1045 bgmac_chip_intrs_on(bgmac); 1046 } else { 1047 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 1048 ring = &bgmac->rx_ring[i]; 1049 bgmac_dma_rx_enable(bgmac, ring); 1050 } 1051 } 1052 1053 bgmac_enable(bgmac); 1054 } 1055 1056 static irqreturn_t bgmac_interrupt(int irq, void *dev_id) 1057 { 1058 struct bgmac *bgmac = netdev_priv(dev_id); 1059 1060 u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS); 1061 int_status &= bgmac->int_mask; 1062 1063 if (!int_status) 1064 return IRQ_NONE; 1065 1066 /* Ack */ 1067 bgmac_write(bgmac, BGMAC_INT_STATUS, int_status); 1068 1069 /* Disable new interrupts until handling existing ones */ 1070 bgmac_chip_intrs_off(bgmac); 1071 1072 bgmac->int_status = int_status; 1073 1074 napi_schedule(&bgmac->napi); 1075 1076 return IRQ_HANDLED; 1077 } 1078 1079 static int bgmac_poll(struct napi_struct *napi, int weight) 1080 { 1081 struct bgmac *bgmac = container_of(napi, struct bgmac, napi); 1082 struct bgmac_dma_ring *ring; 1083 int handled = 0; 1084 1085 if (bgmac->int_status & BGMAC_IS_TX0) { 1086 ring = &bgmac->tx_ring[0]; 1087 bgmac_dma_tx_free(bgmac, ring); 1088 bgmac->int_status &= ~BGMAC_IS_TX0; 1089 } 1090 1091 if (bgmac->int_status & BGMAC_IS_RX) { 1092 ring = &bgmac->rx_ring[0]; 1093 handled += bgmac_dma_rx_read(bgmac, ring, weight); 1094 bgmac->int_status &= ~BGMAC_IS_RX; 1095 } 1096 1097 if (bgmac->int_status) { 1098 bgmac_err(bgmac, "Unknown IRQs: 0x%08X\n", bgmac->int_status); 1099 bgmac->int_status = 0; 1100 } 1101 1102 if (handled < weight) 1103 napi_complete(napi); 1104 1105 bgmac_chip_intrs_on(bgmac); 1106 1107 return handled; 1108 } 1109 1110 /************************************************** 1111 * net_device_ops 1112 **************************************************/ 1113 1114 static int bgmac_open(struct net_device *net_dev) 1115 { 1116 struct bgmac *bgmac = netdev_priv(net_dev); 1117 int err = 0; 1118 1119 bgmac_chip_reset(bgmac); 1120 /* Specs say about reclaiming rings here, but we do that in DMA init */ 1121 bgmac_chip_init(bgmac, true); 1122 1123 err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED, 1124 KBUILD_MODNAME, net_dev); 1125 if (err < 0) { 1126 bgmac_err(bgmac, "IRQ request error: %d!\n", err); 1127 goto err_out; 1128 } 1129 napi_enable(&bgmac->napi); 1130 1131 netif_carrier_on(net_dev); 1132 1133 err_out: 1134 return err; 1135 } 1136 1137 static int bgmac_stop(struct net_device *net_dev) 1138 { 1139 struct bgmac *bgmac = netdev_priv(net_dev); 1140 1141 netif_carrier_off(net_dev); 1142 1143 napi_disable(&bgmac->napi); 1144 bgmac_chip_intrs_off(bgmac); 1145 free_irq(bgmac->core->irq, net_dev); 1146 1147 bgmac_chip_reset(bgmac); 1148 1149 return 0; 1150 } 1151 1152 static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb, 1153 struct net_device *net_dev) 1154 { 1155 struct bgmac *bgmac = netdev_priv(net_dev); 1156 struct bgmac_dma_ring *ring; 1157 1158 /* No QOS support yet */ 1159 ring = &bgmac->tx_ring[0]; 1160 return bgmac_dma_tx_add(bgmac, ring, skb); 1161 } 1162 1163 static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 1164 { 1165 struct bgmac *bgmac = netdev_priv(net_dev); 1166 struct mii_ioctl_data *data = if_mii(ifr); 1167 1168 switch (cmd) { 1169 case SIOCGMIIPHY: 1170 data->phy_id = bgmac->phyaddr; 1171 /* fallthru */ 1172 case SIOCGMIIREG: 1173 if (!netif_running(net_dev)) 1174 return -EAGAIN; 1175 data->val_out = bgmac_phy_read(bgmac, data->phy_id, 1176 data->reg_num & 0x1f); 1177 return 0; 1178 case SIOCSMIIREG: 1179 if (!netif_running(net_dev)) 1180 return -EAGAIN; 1181 bgmac_phy_write(bgmac, data->phy_id, data->reg_num & 0x1f, 1182 data->val_in); 1183 return 0; 1184 default: 1185 return -EOPNOTSUPP; 1186 } 1187 } 1188 1189 static const struct net_device_ops bgmac_netdev_ops = { 1190 .ndo_open = bgmac_open, 1191 .ndo_stop = bgmac_stop, 1192 .ndo_start_xmit = bgmac_start_xmit, 1193 .ndo_set_mac_address = eth_mac_addr, /* generic, sets dev_addr */ 1194 .ndo_do_ioctl = bgmac_ioctl, 1195 }; 1196 1197 /************************************************** 1198 * ethtool_ops 1199 **************************************************/ 1200 1201 static int bgmac_get_settings(struct net_device *net_dev, 1202 struct ethtool_cmd *cmd) 1203 { 1204 struct bgmac *bgmac = netdev_priv(net_dev); 1205 1206 cmd->supported = SUPPORTED_10baseT_Half | 1207 SUPPORTED_10baseT_Full | 1208 SUPPORTED_100baseT_Half | 1209 SUPPORTED_100baseT_Full | 1210 SUPPORTED_1000baseT_Half | 1211 SUPPORTED_1000baseT_Full | 1212 SUPPORTED_Autoneg; 1213 1214 if (bgmac->autoneg) { 1215 WARN_ON(cmd->advertising); 1216 if (bgmac->full_duplex) { 1217 if (bgmac->speed & BGMAC_SPEED_10) 1218 cmd->advertising |= ADVERTISED_10baseT_Full; 1219 if (bgmac->speed & BGMAC_SPEED_100) 1220 cmd->advertising |= ADVERTISED_100baseT_Full; 1221 if (bgmac->speed & BGMAC_SPEED_1000) 1222 cmd->advertising |= ADVERTISED_1000baseT_Full; 1223 } else { 1224 if (bgmac->speed & BGMAC_SPEED_10) 1225 cmd->advertising |= ADVERTISED_10baseT_Half; 1226 if (bgmac->speed & BGMAC_SPEED_100) 1227 cmd->advertising |= ADVERTISED_100baseT_Half; 1228 if (bgmac->speed & BGMAC_SPEED_1000) 1229 cmd->advertising |= ADVERTISED_1000baseT_Half; 1230 } 1231 } else { 1232 switch (bgmac->speed) { 1233 case BGMAC_SPEED_10: 1234 ethtool_cmd_speed_set(cmd, SPEED_10); 1235 break; 1236 case BGMAC_SPEED_100: 1237 ethtool_cmd_speed_set(cmd, SPEED_100); 1238 break; 1239 case BGMAC_SPEED_1000: 1240 ethtool_cmd_speed_set(cmd, SPEED_1000); 1241 break; 1242 } 1243 } 1244 1245 cmd->duplex = bgmac->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; 1246 1247 cmd->autoneg = bgmac->autoneg; 1248 1249 return 0; 1250 } 1251 1252 #if 0 1253 static int bgmac_set_settings(struct net_device *net_dev, 1254 struct ethtool_cmd *cmd) 1255 { 1256 struct bgmac *bgmac = netdev_priv(net_dev); 1257 1258 return -1; 1259 } 1260 #endif 1261 1262 static void bgmac_get_drvinfo(struct net_device *net_dev, 1263 struct ethtool_drvinfo *info) 1264 { 1265 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 1266 strlcpy(info->bus_info, "BCMA", sizeof(info->bus_info)); 1267 } 1268 1269 static const struct ethtool_ops bgmac_ethtool_ops = { 1270 .get_settings = bgmac_get_settings, 1271 .get_drvinfo = bgmac_get_drvinfo, 1272 }; 1273 1274 /************************************************** 1275 * BCMA bus ops 1276 **************************************************/ 1277 1278 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */ 1279 static int bgmac_probe(struct bcma_device *core) 1280 { 1281 struct net_device *net_dev; 1282 struct bgmac *bgmac; 1283 struct ssb_sprom *sprom = &core->bus->sprom; 1284 u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac; 1285 int err; 1286 1287 /* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */ 1288 if (core->core_unit > 1) { 1289 pr_err("Unsupported core_unit %d\n", core->core_unit); 1290 return -ENOTSUPP; 1291 } 1292 1293 /* Allocation and references */ 1294 net_dev = alloc_etherdev(sizeof(*bgmac)); 1295 if (!net_dev) 1296 return -ENOMEM; 1297 net_dev->netdev_ops = &bgmac_netdev_ops; 1298 net_dev->irq = core->irq; 1299 SET_ETHTOOL_OPS(net_dev, &bgmac_ethtool_ops); 1300 bgmac = netdev_priv(net_dev); 1301 bgmac->net_dev = net_dev; 1302 bgmac->core = core; 1303 bcma_set_drvdata(core, bgmac); 1304 1305 /* Defaults */ 1306 bgmac->autoneg = true; 1307 bgmac->full_duplex = true; 1308 bgmac->speed = BGMAC_SPEED_10 | BGMAC_SPEED_100 | BGMAC_SPEED_1000; 1309 memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN); 1310 1311 /* On BCM4706 we need common core to access PHY */ 1312 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 1313 !core->bus->drv_gmac_cmn.core) { 1314 bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n"); 1315 err = -ENODEV; 1316 goto err_netdev_free; 1317 } 1318 bgmac->cmn = core->bus->drv_gmac_cmn.core; 1319 1320 bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr : 1321 sprom->et0phyaddr; 1322 bgmac->phyaddr &= BGMAC_PHY_MASK; 1323 if (bgmac->phyaddr == BGMAC_PHY_MASK) { 1324 bgmac_err(bgmac, "No PHY found\n"); 1325 err = -ENODEV; 1326 goto err_netdev_free; 1327 } 1328 bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr, 1329 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : ""); 1330 1331 if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) { 1332 bgmac_err(bgmac, "PCI setup not implemented\n"); 1333 err = -ENOTSUPP; 1334 goto err_netdev_free; 1335 } 1336 1337 bgmac_chip_reset(bgmac); 1338 1339 err = bgmac_dma_alloc(bgmac); 1340 if (err) { 1341 bgmac_err(bgmac, "Unable to alloc memory for DMA\n"); 1342 goto err_netdev_free; 1343 } 1344 1345 bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK; 1346 if (nvram_getenv("et0_no_txint", NULL, 0) == 0) 1347 bgmac->int_mask &= ~BGMAC_IS_TX_MASK; 1348 1349 /* TODO: reset the external phy. Specs are needed */ 1350 bgmac_phy_reset(bgmac); 1351 1352 bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo & 1353 BGMAC_BFL_ENETROBO); 1354 if (bgmac->has_robosw) 1355 bgmac_warn(bgmac, "Support for Roboswitch not implemented\n"); 1356 1357 if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM) 1358 bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n"); 1359 1360 err = register_netdev(bgmac->net_dev); 1361 if (err) { 1362 bgmac_err(bgmac, "Cannot register net device\n"); 1363 err = -ENOTSUPP; 1364 goto err_dma_free; 1365 } 1366 1367 netif_carrier_off(net_dev); 1368 1369 netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT); 1370 1371 return 0; 1372 1373 err_dma_free: 1374 bgmac_dma_free(bgmac); 1375 1376 err_netdev_free: 1377 bcma_set_drvdata(core, NULL); 1378 free_netdev(net_dev); 1379 1380 return err; 1381 } 1382 1383 static void bgmac_remove(struct bcma_device *core) 1384 { 1385 struct bgmac *bgmac = bcma_get_drvdata(core); 1386 1387 netif_napi_del(&bgmac->napi); 1388 unregister_netdev(bgmac->net_dev); 1389 bgmac_dma_free(bgmac); 1390 bcma_set_drvdata(core, NULL); 1391 free_netdev(bgmac->net_dev); 1392 } 1393 1394 static struct bcma_driver bgmac_bcma_driver = { 1395 .name = KBUILD_MODNAME, 1396 .id_table = bgmac_bcma_tbl, 1397 .probe = bgmac_probe, 1398 .remove = bgmac_remove, 1399 }; 1400 1401 static int __init bgmac_init(void) 1402 { 1403 int err; 1404 1405 err = bcma_driver_register(&bgmac_bcma_driver); 1406 if (err) 1407 return err; 1408 pr_info("Broadcom 47xx GBit MAC driver loaded\n"); 1409 1410 return 0; 1411 } 1412 1413 static void __exit bgmac_exit(void) 1414 { 1415 bcma_driver_unregister(&bgmac_bcma_driver); 1416 } 1417 1418 module_init(bgmac_init) 1419 module_exit(bgmac_exit) 1420 1421 MODULE_AUTHOR("Rafał Miłecki"); 1422 MODULE_LICENSE("GPL"); 1423