Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 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> |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 16 | #include <linux/phy.h> |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/dma-mapping.h> |
Ralf Baechle | edb15d8 | 2013-02-21 16:16:55 +0100 | [diff] [blame] | 19 | #include <bcm47xx_nvram.h> |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 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->end * sizeof(struct bgmac_dma_desc)); |
| 161 | |
| 162 | /* Always keep one slot free to allow detecting bugged calls. */ |
| 163 | if (--free_slots == 1) |
| 164 | netif_stop_queue(net_dev); |
| 165 | |
| 166 | return NETDEV_TX_OK; |
| 167 | |
| 168 | err_stop_drop: |
| 169 | netif_stop_queue(net_dev); |
| 170 | dev_kfree_skb(skb); |
| 171 | return NETDEV_TX_OK; |
| 172 | } |
| 173 | |
| 174 | /* Free transmitted packets */ |
| 175 | static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring) |
| 176 | { |
| 177 | struct device *dma_dev = bgmac->core->dma_dev; |
| 178 | int empty_slot; |
| 179 | bool freed = false; |
| 180 | |
| 181 | /* The last slot that hardware didn't consume yet */ |
| 182 | empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); |
| 183 | empty_slot &= BGMAC_DMA_TX_STATDPTR; |
| 184 | empty_slot /= sizeof(struct bgmac_dma_desc); |
| 185 | |
| 186 | while (ring->start != empty_slot) { |
| 187 | struct bgmac_slot_info *slot = &ring->slots[ring->start]; |
| 188 | |
| 189 | if (slot->skb) { |
| 190 | /* Unmap no longer used buffer */ |
| 191 | dma_unmap_single(dma_dev, slot->dma_addr, |
| 192 | slot->skb->len, DMA_TO_DEVICE); |
| 193 | slot->dma_addr = 0; |
| 194 | |
| 195 | /* Free memory! :) */ |
| 196 | dev_kfree_skb(slot->skb); |
| 197 | slot->skb = NULL; |
| 198 | } else { |
| 199 | bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n", |
| 200 | ring->start, ring->end); |
| 201 | } |
| 202 | |
| 203 | if (++ring->start >= BGMAC_TX_RING_SLOTS) |
| 204 | ring->start = 0; |
| 205 | freed = true; |
| 206 | } |
| 207 | |
| 208 | if (freed && netif_queue_stopped(bgmac->net_dev)) |
| 209 | netif_wake_queue(bgmac->net_dev); |
| 210 | } |
| 211 | |
| 212 | static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) |
| 213 | { |
| 214 | if (!ring->mmio_base) |
| 215 | return; |
| 216 | |
| 217 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0); |
| 218 | if (!bgmac_wait_value(bgmac->core, |
| 219 | ring->mmio_base + BGMAC_DMA_RX_STATUS, |
| 220 | BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED, |
| 221 | 10000)) |
| 222 | bgmac_err(bgmac, "Reset of ring 0x%X RX failed\n", |
| 223 | ring->mmio_base); |
| 224 | } |
| 225 | |
| 226 | static void bgmac_dma_rx_enable(struct bgmac *bgmac, |
| 227 | struct bgmac_dma_ring *ring) |
| 228 | { |
| 229 | u32 ctl; |
| 230 | |
| 231 | ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL); |
| 232 | ctl &= BGMAC_DMA_RX_ADDREXT_MASK; |
| 233 | ctl |= BGMAC_DMA_RX_ENABLE; |
| 234 | ctl |= BGMAC_DMA_RX_PARITY_DISABLE; |
| 235 | ctl |= BGMAC_DMA_RX_OVERFLOW_CONT; |
| 236 | ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT; |
| 237 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl); |
| 238 | } |
| 239 | |
| 240 | static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac, |
| 241 | struct bgmac_slot_info *slot) |
| 242 | { |
| 243 | struct device *dma_dev = bgmac->core->dma_dev; |
| 244 | struct bgmac_rx_header *rx; |
| 245 | |
| 246 | /* Alloc skb */ |
| 247 | slot->skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE); |
Joe Perches | 720a43e | 2013-03-08 15:03:25 +0000 | [diff] [blame] | 248 | if (!slot->skb) |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 249 | return -ENOMEM; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 250 | |
| 251 | /* Poison - if everything goes fine, hardware will overwrite it */ |
| 252 | rx = (struct bgmac_rx_header *)slot->skb->data; |
| 253 | rx->len = cpu_to_le16(0xdead); |
| 254 | rx->flags = cpu_to_le16(0xbeef); |
| 255 | |
| 256 | /* Map skb for the DMA */ |
| 257 | slot->dma_addr = dma_map_single(dma_dev, slot->skb->data, |
| 258 | BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); |
| 259 | if (dma_mapping_error(dma_dev, slot->dma_addr)) { |
| 260 | bgmac_err(bgmac, "DMA mapping error\n"); |
| 261 | return -ENOMEM; |
| 262 | } |
| 263 | if (slot->dma_addr & 0xC0000000) |
| 264 | bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); |
| 265 | |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, |
| 270 | int weight) |
| 271 | { |
| 272 | u32 end_slot; |
| 273 | int handled = 0; |
| 274 | |
| 275 | end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS); |
| 276 | end_slot &= BGMAC_DMA_RX_STATDPTR; |
| 277 | end_slot /= sizeof(struct bgmac_dma_desc); |
| 278 | |
| 279 | ring->end = end_slot; |
| 280 | |
| 281 | while (ring->start != ring->end) { |
| 282 | struct device *dma_dev = bgmac->core->dma_dev; |
| 283 | struct bgmac_slot_info *slot = &ring->slots[ring->start]; |
| 284 | struct sk_buff *skb = slot->skb; |
| 285 | struct sk_buff *new_skb; |
| 286 | struct bgmac_rx_header *rx; |
| 287 | u16 len, flags; |
| 288 | |
| 289 | /* Unmap buffer to make it accessible to the CPU */ |
| 290 | dma_sync_single_for_cpu(dma_dev, slot->dma_addr, |
| 291 | BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); |
| 292 | |
| 293 | /* Get info from the header */ |
| 294 | rx = (struct bgmac_rx_header *)skb->data; |
| 295 | len = le16_to_cpu(rx->len); |
| 296 | flags = le16_to_cpu(rx->flags); |
| 297 | |
| 298 | /* Check for poison and drop or pass the packet */ |
| 299 | if (len == 0xdead && flags == 0xbeef) { |
| 300 | bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n", |
| 301 | ring->start); |
| 302 | } else { |
Hauke Mehrtens | 02e7112 | 2013-02-28 07:16:54 +0000 | [diff] [blame] | 303 | /* Omit CRC. */ |
| 304 | len -= ETH_FCS_LEN; |
| 305 | |
Hauke Mehrtens | 885d299 | 2013-02-16 11:10:38 +0000 | [diff] [blame] | 306 | new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 307 | if (new_skb) { |
| 308 | skb_put(new_skb, len); |
| 309 | skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET, |
| 310 | new_skb->data, |
| 311 | len); |
Hauke Mehrtens | 02e7112 | 2013-02-28 07:16:54 +0000 | [diff] [blame] | 312 | skb_checksum_none_assert(skb); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 313 | new_skb->protocol = |
| 314 | eth_type_trans(new_skb, bgmac->net_dev); |
| 315 | netif_receive_skb(new_skb); |
| 316 | handled++; |
| 317 | } else { |
| 318 | bgmac->net_dev->stats.rx_dropped++; |
| 319 | bgmac_err(bgmac, "Allocation of skb for copying packet failed!\n"); |
| 320 | } |
| 321 | |
| 322 | /* Poison the old skb */ |
| 323 | rx->len = cpu_to_le16(0xdead); |
| 324 | rx->flags = cpu_to_le16(0xbeef); |
| 325 | } |
| 326 | |
| 327 | /* Make it back accessible to the hardware */ |
| 328 | dma_sync_single_for_device(dma_dev, slot->dma_addr, |
| 329 | BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); |
| 330 | |
| 331 | if (++ring->start >= BGMAC_RX_RING_SLOTS) |
| 332 | ring->start = 0; |
| 333 | |
| 334 | if (handled >= weight) /* Should never be greater */ |
| 335 | break; |
| 336 | } |
| 337 | |
| 338 | return handled; |
| 339 | } |
| 340 | |
| 341 | /* Does ring support unaligned addressing? */ |
| 342 | static bool bgmac_dma_unaligned(struct bgmac *bgmac, |
| 343 | struct bgmac_dma_ring *ring, |
| 344 | enum bgmac_dma_ring_type ring_type) |
| 345 | { |
| 346 | switch (ring_type) { |
| 347 | case BGMAC_DMA_RING_TX: |
| 348 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, |
| 349 | 0xff0); |
| 350 | if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO)) |
| 351 | return true; |
| 352 | break; |
| 353 | case BGMAC_DMA_RING_RX: |
| 354 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, |
| 355 | 0xff0); |
| 356 | if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO)) |
| 357 | return true; |
| 358 | break; |
| 359 | } |
| 360 | return false; |
| 361 | } |
| 362 | |
| 363 | static void bgmac_dma_ring_free(struct bgmac *bgmac, |
| 364 | struct bgmac_dma_ring *ring) |
| 365 | { |
| 366 | struct device *dma_dev = bgmac->core->dma_dev; |
| 367 | struct bgmac_slot_info *slot; |
| 368 | int size; |
| 369 | int i; |
| 370 | |
| 371 | for (i = 0; i < ring->num_slots; i++) { |
| 372 | slot = &ring->slots[i]; |
| 373 | if (slot->skb) { |
| 374 | if (slot->dma_addr) |
| 375 | dma_unmap_single(dma_dev, slot->dma_addr, |
| 376 | slot->skb->len, DMA_TO_DEVICE); |
| 377 | dev_kfree_skb(slot->skb); |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | if (ring->cpu_base) { |
| 382 | /* Free ring of descriptors */ |
| 383 | size = ring->num_slots * sizeof(struct bgmac_dma_desc); |
| 384 | dma_free_coherent(dma_dev, size, ring->cpu_base, |
| 385 | ring->dma_base); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | static void bgmac_dma_free(struct bgmac *bgmac) |
| 390 | { |
| 391 | int i; |
| 392 | |
| 393 | for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) |
| 394 | bgmac_dma_ring_free(bgmac, &bgmac->tx_ring[i]); |
| 395 | for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) |
| 396 | bgmac_dma_ring_free(bgmac, &bgmac->rx_ring[i]); |
| 397 | } |
| 398 | |
| 399 | static int bgmac_dma_alloc(struct bgmac *bgmac) |
| 400 | { |
| 401 | struct device *dma_dev = bgmac->core->dma_dev; |
| 402 | struct bgmac_dma_ring *ring; |
| 403 | static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1, |
| 404 | BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, }; |
| 405 | int size; /* ring size: different for Tx and Rx */ |
| 406 | int err; |
| 407 | int i; |
| 408 | |
| 409 | BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base)); |
| 410 | BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base)); |
| 411 | |
| 412 | if (!(bcma_aread32(bgmac->core, BCMA_IOST) & BCMA_IOST_DMA64)) { |
| 413 | bgmac_err(bgmac, "Core does not report 64-bit DMA\n"); |
| 414 | return -ENOTSUPP; |
| 415 | } |
| 416 | |
| 417 | for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { |
| 418 | ring = &bgmac->tx_ring[i]; |
| 419 | ring->num_slots = BGMAC_TX_RING_SLOTS; |
| 420 | ring->mmio_base = ring_base[i]; |
| 421 | if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_TX)) |
| 422 | bgmac_warn(bgmac, "TX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", |
| 423 | ring->mmio_base); |
| 424 | |
| 425 | /* Alloc ring of descriptors */ |
| 426 | size = ring->num_slots * sizeof(struct bgmac_dma_desc); |
| 427 | ring->cpu_base = dma_zalloc_coherent(dma_dev, size, |
| 428 | &ring->dma_base, |
| 429 | GFP_KERNEL); |
| 430 | if (!ring->cpu_base) { |
| 431 | bgmac_err(bgmac, "Allocation of TX ring 0x%X failed\n", |
| 432 | ring->mmio_base); |
| 433 | goto err_dma_free; |
| 434 | } |
| 435 | if (ring->dma_base & 0xC0000000) |
| 436 | bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); |
| 437 | |
| 438 | /* No need to alloc TX slots yet */ |
| 439 | } |
| 440 | |
| 441 | for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 442 | int j; |
| 443 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 444 | ring = &bgmac->rx_ring[i]; |
| 445 | ring->num_slots = BGMAC_RX_RING_SLOTS; |
| 446 | ring->mmio_base = ring_base[i]; |
| 447 | if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_RX)) |
| 448 | bgmac_warn(bgmac, "RX on ring 0x%X supports unaligned addressing but this feature is not implemented\n", |
| 449 | ring->mmio_base); |
| 450 | |
| 451 | /* Alloc ring of descriptors */ |
| 452 | size = ring->num_slots * sizeof(struct bgmac_dma_desc); |
| 453 | ring->cpu_base = dma_zalloc_coherent(dma_dev, size, |
| 454 | &ring->dma_base, |
| 455 | GFP_KERNEL); |
| 456 | if (!ring->cpu_base) { |
| 457 | bgmac_err(bgmac, "Allocation of RX ring 0x%X failed\n", |
| 458 | ring->mmio_base); |
| 459 | err = -ENOMEM; |
| 460 | goto err_dma_free; |
| 461 | } |
| 462 | if (ring->dma_base & 0xC0000000) |
| 463 | bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n"); |
| 464 | |
| 465 | /* Alloc RX slots */ |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 466 | for (j = 0; j < ring->num_slots; j++) { |
| 467 | err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 468 | if (err) { |
| 469 | bgmac_err(bgmac, "Can't allocate skb for slot in RX ring\n"); |
| 470 | goto err_dma_free; |
| 471 | } |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | return 0; |
| 476 | |
| 477 | err_dma_free: |
| 478 | bgmac_dma_free(bgmac); |
| 479 | return -ENOMEM; |
| 480 | } |
| 481 | |
| 482 | static void bgmac_dma_init(struct bgmac *bgmac) |
| 483 | { |
| 484 | struct bgmac_dma_ring *ring; |
| 485 | struct bgmac_dma_desc *dma_desc; |
| 486 | u32 ctl0, ctl1; |
| 487 | int i; |
| 488 | |
| 489 | for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { |
| 490 | ring = &bgmac->tx_ring[i]; |
| 491 | |
| 492 | /* We don't implement unaligned addressing, so enable first */ |
| 493 | bgmac_dma_tx_enable(bgmac, ring); |
| 494 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, |
| 495 | lower_32_bits(ring->dma_base)); |
| 496 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI, |
| 497 | upper_32_bits(ring->dma_base)); |
| 498 | |
| 499 | ring->start = 0; |
| 500 | ring->end = 0; /* Points the slot that should *not* be read */ |
| 501 | } |
| 502 | |
| 503 | for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 504 | int j; |
| 505 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 506 | ring = &bgmac->rx_ring[i]; |
| 507 | |
| 508 | /* We don't implement unaligned addressing, so enable first */ |
| 509 | bgmac_dma_rx_enable(bgmac, ring); |
| 510 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, |
| 511 | lower_32_bits(ring->dma_base)); |
| 512 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI, |
| 513 | upper_32_bits(ring->dma_base)); |
| 514 | |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 515 | for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots; |
| 516 | j++, dma_desc++) { |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 517 | ctl0 = ctl1 = 0; |
| 518 | |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 519 | if (j == ring->num_slots - 1) |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 520 | ctl0 |= BGMAC_DESC_CTL0_EOT; |
| 521 | ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN; |
| 522 | /* Is there any BGMAC device that requires extension? */ |
| 523 | /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) & |
| 524 | * B43_DMA64_DCTL1_ADDREXT_MASK; |
| 525 | */ |
| 526 | |
Rafał Miłecki | 70a737b | 2013-02-25 08:22:26 +0000 | [diff] [blame] | 527 | dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[j].dma_addr)); |
| 528 | dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[j].dma_addr)); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 529 | dma_desc->ctl0 = cpu_to_le32(ctl0); |
| 530 | dma_desc->ctl1 = cpu_to_le32(ctl1); |
| 531 | } |
| 532 | |
| 533 | bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, |
| 534 | ring->num_slots * sizeof(struct bgmac_dma_desc)); |
| 535 | |
| 536 | ring->start = 0; |
| 537 | ring->end = 0; |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | /************************************************** |
| 542 | * PHY ops |
| 543 | **************************************************/ |
| 544 | |
Rafał Miłecki | 217a55a | 2013-02-12 23:14:51 +0000 | [diff] [blame] | 545 | static u16 bgmac_phy_read(struct bgmac *bgmac, u8 phyaddr, u8 reg) |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 546 | { |
| 547 | struct bcma_device *core; |
| 548 | u16 phy_access_addr; |
| 549 | u16 phy_ctl_addr; |
| 550 | u32 tmp; |
| 551 | |
| 552 | BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK); |
| 553 | BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK); |
| 554 | BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT); |
| 555 | BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK); |
| 556 | BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT); |
| 557 | BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE); |
| 558 | BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START); |
| 559 | BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK); |
| 560 | BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK); |
| 561 | BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT); |
| 562 | BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE); |
| 563 | |
| 564 | if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { |
| 565 | core = bgmac->core->bus->drv_gmac_cmn.core; |
| 566 | phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; |
| 567 | phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; |
| 568 | } else { |
| 569 | core = bgmac->core; |
| 570 | phy_access_addr = BGMAC_PHY_ACCESS; |
| 571 | phy_ctl_addr = BGMAC_PHY_CNTL; |
| 572 | } |
| 573 | |
| 574 | tmp = bcma_read32(core, phy_ctl_addr); |
| 575 | tmp &= ~BGMAC_PC_EPA_MASK; |
| 576 | tmp |= phyaddr; |
| 577 | bcma_write32(core, phy_ctl_addr, tmp); |
| 578 | |
| 579 | tmp = BGMAC_PA_START; |
| 580 | tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; |
| 581 | tmp |= reg << BGMAC_PA_REG_SHIFT; |
| 582 | bcma_write32(core, phy_access_addr, tmp); |
| 583 | |
| 584 | if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) { |
| 585 | bgmac_err(bgmac, "Reading PHY %d register 0x%X failed\n", |
| 586 | phyaddr, reg); |
| 587 | return 0xffff; |
| 588 | } |
| 589 | |
| 590 | return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK; |
| 591 | } |
| 592 | |
| 593 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */ |
Rafał Miłecki | 217a55a | 2013-02-12 23:14:51 +0000 | [diff] [blame] | 594 | static int bgmac_phy_write(struct bgmac *bgmac, u8 phyaddr, u8 reg, u16 value) |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 595 | { |
| 596 | struct bcma_device *core; |
| 597 | u16 phy_access_addr; |
| 598 | u16 phy_ctl_addr; |
| 599 | u32 tmp; |
| 600 | |
| 601 | if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) { |
| 602 | core = bgmac->core->bus->drv_gmac_cmn.core; |
| 603 | phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS; |
| 604 | phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL; |
| 605 | } else { |
| 606 | core = bgmac->core; |
| 607 | phy_access_addr = BGMAC_PHY_ACCESS; |
| 608 | phy_ctl_addr = BGMAC_PHY_CNTL; |
| 609 | } |
| 610 | |
| 611 | tmp = bcma_read32(core, phy_ctl_addr); |
| 612 | tmp &= ~BGMAC_PC_EPA_MASK; |
| 613 | tmp |= phyaddr; |
| 614 | bcma_write32(core, phy_ctl_addr, tmp); |
| 615 | |
| 616 | bgmac_write(bgmac, BGMAC_INT_STATUS, BGMAC_IS_MDIO); |
| 617 | if (bgmac_read(bgmac, BGMAC_INT_STATUS) & BGMAC_IS_MDIO) |
| 618 | bgmac_warn(bgmac, "Error setting MDIO int\n"); |
| 619 | |
| 620 | tmp = BGMAC_PA_START; |
| 621 | tmp |= BGMAC_PA_WRITE; |
| 622 | tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT; |
| 623 | tmp |= reg << BGMAC_PA_REG_SHIFT; |
| 624 | tmp |= value; |
| 625 | bcma_write32(core, phy_access_addr, tmp); |
| 626 | |
Rafał Miłecki | 217a55a | 2013-02-12 23:14:51 +0000 | [diff] [blame] | 627 | if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) { |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 628 | bgmac_err(bgmac, "Writing to PHY %d register 0x%X failed\n", |
| 629 | phyaddr, reg); |
Rafał Miłecki | 217a55a | 2013-02-12 23:14:51 +0000 | [diff] [blame] | 630 | return -ETIMEDOUT; |
| 631 | } |
| 632 | |
| 633 | return 0; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyforce */ |
| 637 | static void bgmac_phy_force(struct bgmac *bgmac) |
| 638 | { |
| 639 | u16 ctl; |
| 640 | u16 mask = ~(BGMAC_PHY_CTL_SPEED | BGMAC_PHY_CTL_SPEED_MSB | |
| 641 | BGMAC_PHY_CTL_ANENAB | BGMAC_PHY_CTL_DUPLEX); |
| 642 | |
| 643 | if (bgmac->phyaddr == BGMAC_PHY_NOREGS) |
| 644 | return; |
| 645 | |
| 646 | if (bgmac->autoneg) |
| 647 | return; |
| 648 | |
| 649 | ctl = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL); |
| 650 | ctl &= mask; |
| 651 | if (bgmac->full_duplex) |
| 652 | ctl |= BGMAC_PHY_CTL_DUPLEX; |
| 653 | if (bgmac->speed == BGMAC_SPEED_100) |
| 654 | ctl |= BGMAC_PHY_CTL_SPEED_100; |
| 655 | else if (bgmac->speed == BGMAC_SPEED_1000) |
| 656 | ctl |= BGMAC_PHY_CTL_SPEED_1000; |
| 657 | bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, ctl); |
| 658 | } |
| 659 | |
| 660 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyadvertise */ |
| 661 | static void bgmac_phy_advertise(struct bgmac *bgmac) |
| 662 | { |
| 663 | u16 adv; |
| 664 | |
| 665 | if (bgmac->phyaddr == BGMAC_PHY_NOREGS) |
| 666 | return; |
| 667 | |
| 668 | if (!bgmac->autoneg) |
| 669 | return; |
| 670 | |
| 671 | /* Adv selected 10/100 speeds */ |
| 672 | adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV); |
| 673 | adv &= ~(BGMAC_PHY_ADV_10HALF | BGMAC_PHY_ADV_10FULL | |
| 674 | BGMAC_PHY_ADV_100HALF | BGMAC_PHY_ADV_100FULL); |
| 675 | if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) |
| 676 | adv |= BGMAC_PHY_ADV_10HALF; |
| 677 | if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) |
| 678 | adv |= BGMAC_PHY_ADV_100HALF; |
| 679 | if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10) |
| 680 | adv |= BGMAC_PHY_ADV_10FULL; |
| 681 | if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100) |
| 682 | adv |= BGMAC_PHY_ADV_100FULL; |
| 683 | bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV, adv); |
| 684 | |
| 685 | /* Adv selected 1000 speeds */ |
| 686 | adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2); |
| 687 | adv &= ~(BGMAC_PHY_ADV2_1000HALF | BGMAC_PHY_ADV2_1000FULL); |
| 688 | if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) |
| 689 | adv |= BGMAC_PHY_ADV2_1000HALF; |
| 690 | if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000) |
| 691 | adv |= BGMAC_PHY_ADV2_1000FULL; |
| 692 | bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2, adv); |
| 693 | |
| 694 | /* Restart */ |
| 695 | bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, |
| 696 | bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) | |
| 697 | BGMAC_PHY_CTL_RESTART); |
| 698 | } |
| 699 | |
| 700 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */ |
| 701 | static void bgmac_phy_init(struct bgmac *bgmac) |
| 702 | { |
| 703 | struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; |
| 704 | struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; |
| 705 | u8 i; |
| 706 | |
| 707 | if (ci->id == BCMA_CHIP_ID_BCM5356) { |
| 708 | for (i = 0; i < 5; i++) { |
| 709 | bgmac_phy_write(bgmac, i, 0x1f, 0x008b); |
| 710 | bgmac_phy_write(bgmac, i, 0x15, 0x0100); |
| 711 | bgmac_phy_write(bgmac, i, 0x1f, 0x000f); |
| 712 | bgmac_phy_write(bgmac, i, 0x12, 0x2aaa); |
| 713 | bgmac_phy_write(bgmac, i, 0x1f, 0x000b); |
| 714 | } |
| 715 | } |
| 716 | if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) || |
| 717 | (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) || |
| 718 | (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) { |
| 719 | bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0); |
| 720 | bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0); |
| 721 | for (i = 0; i < 5; i++) { |
| 722 | bgmac_phy_write(bgmac, i, 0x1f, 0x000f); |
| 723 | bgmac_phy_write(bgmac, i, 0x16, 0x5284); |
| 724 | bgmac_phy_write(bgmac, i, 0x1f, 0x000b); |
| 725 | bgmac_phy_write(bgmac, i, 0x17, 0x0010); |
| 726 | bgmac_phy_write(bgmac, i, 0x1f, 0x000f); |
| 727 | bgmac_phy_write(bgmac, i, 0x16, 0x5296); |
| 728 | bgmac_phy_write(bgmac, i, 0x17, 0x1073); |
| 729 | bgmac_phy_write(bgmac, i, 0x17, 0x9073); |
| 730 | bgmac_phy_write(bgmac, i, 0x16, 0x52b6); |
| 731 | bgmac_phy_write(bgmac, i, 0x17, 0x9273); |
| 732 | bgmac_phy_write(bgmac, i, 0x1f, 0x000b); |
| 733 | } |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */ |
| 738 | static void bgmac_phy_reset(struct bgmac *bgmac) |
| 739 | { |
| 740 | if (bgmac->phyaddr == BGMAC_PHY_NOREGS) |
| 741 | return; |
| 742 | |
| 743 | bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, |
| 744 | BGMAC_PHY_CTL_RESET); |
| 745 | udelay(100); |
| 746 | if (bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) & |
| 747 | BGMAC_PHY_CTL_RESET) |
| 748 | bgmac_err(bgmac, "PHY reset failed\n"); |
| 749 | bgmac_phy_init(bgmac); |
| 750 | } |
| 751 | |
| 752 | /************************************************** |
| 753 | * Chip ops |
| 754 | **************************************************/ |
| 755 | |
| 756 | /* TODO: can we just drop @force? Can we don't reset MAC at all if there is |
| 757 | * nothing to change? Try if after stabilizng driver. |
| 758 | */ |
| 759 | static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set, |
| 760 | bool force) |
| 761 | { |
| 762 | u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); |
| 763 | u32 new_val = (cmdcfg & mask) | set; |
| 764 | |
| 765 | bgmac_set(bgmac, BGMAC_CMDCFG, BGMAC_CMDCFG_SR); |
| 766 | udelay(2); |
| 767 | |
| 768 | if (new_val != cmdcfg || force) |
| 769 | bgmac_write(bgmac, BGMAC_CMDCFG, new_val); |
| 770 | |
| 771 | bgmac_mask(bgmac, BGMAC_CMDCFG, ~BGMAC_CMDCFG_SR); |
| 772 | udelay(2); |
| 773 | } |
| 774 | |
Hauke Mehrtens | 4e20900 | 2013-02-06 04:44:58 +0000 | [diff] [blame] | 775 | static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr) |
| 776 | { |
| 777 | u32 tmp; |
| 778 | |
| 779 | tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]; |
| 780 | bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp); |
| 781 | tmp = (addr[4] << 8) | addr[5]; |
| 782 | bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp); |
| 783 | } |
| 784 | |
Hauke Mehrtens | c6edfe1 | 2013-02-06 05:51:49 +0000 | [diff] [blame] | 785 | static void bgmac_set_rx_mode(struct net_device *net_dev) |
| 786 | { |
| 787 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 788 | |
| 789 | if (net_dev->flags & IFF_PROMISC) |
Rafał Miłecki | e9ba103 | 2013-02-07 05:40:38 +0000 | [diff] [blame] | 790 | bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true); |
Hauke Mehrtens | c6edfe1 | 2013-02-06 05:51:49 +0000 | [diff] [blame] | 791 | else |
Rafał Miłecki | e9ba103 | 2013-02-07 05:40:38 +0000 | [diff] [blame] | 792 | bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true); |
Hauke Mehrtens | c6edfe1 | 2013-02-06 05:51:49 +0000 | [diff] [blame] | 793 | } |
| 794 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 795 | #if 0 /* We don't use that regs yet */ |
| 796 | static void bgmac_chip_stats_update(struct bgmac *bgmac) |
| 797 | { |
| 798 | int i; |
| 799 | |
| 800 | if (bgmac->core->id.id != BCMA_CORE_4706_MAC_GBIT) { |
| 801 | for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) |
| 802 | bgmac->mib_tx_regs[i] = |
| 803 | bgmac_read(bgmac, |
| 804 | BGMAC_TX_GOOD_OCTETS + (i * 4)); |
| 805 | for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) |
| 806 | bgmac->mib_rx_regs[i] = |
| 807 | bgmac_read(bgmac, |
| 808 | BGMAC_RX_GOOD_OCTETS + (i * 4)); |
| 809 | } |
| 810 | |
| 811 | /* TODO: what else? how to handle BCM4706? Specs are needed */ |
| 812 | } |
| 813 | #endif |
| 814 | |
| 815 | static void bgmac_clear_mib(struct bgmac *bgmac) |
| 816 | { |
| 817 | int i; |
| 818 | |
| 819 | if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) |
| 820 | return; |
| 821 | |
| 822 | bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR); |
| 823 | for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) |
| 824 | bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4)); |
| 825 | for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) |
| 826 | bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4)); |
| 827 | } |
| 828 | |
| 829 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */ |
| 830 | static void bgmac_speed(struct bgmac *bgmac, int speed) |
| 831 | { |
| 832 | u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD); |
| 833 | u32 set = 0; |
| 834 | |
| 835 | if (speed & BGMAC_SPEED_10) |
| 836 | set |= BGMAC_CMDCFG_ES_10; |
| 837 | if (speed & BGMAC_SPEED_100) |
| 838 | set |= BGMAC_CMDCFG_ES_100; |
| 839 | if (speed & BGMAC_SPEED_1000) |
| 840 | set |= BGMAC_CMDCFG_ES_1000; |
| 841 | if (!bgmac->full_duplex) |
| 842 | set |= BGMAC_CMDCFG_HD; |
| 843 | bgmac_cmdcfg_maskset(bgmac, mask, set, true); |
| 844 | } |
| 845 | |
| 846 | static void bgmac_miiconfig(struct bgmac *bgmac) |
| 847 | { |
| 848 | u8 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> |
| 849 | BGMAC_DS_MM_SHIFT; |
| 850 | if (imode == 0 || imode == 1) { |
| 851 | if (bgmac->autoneg) |
| 852 | bgmac_speed(bgmac, BGMAC_SPEED_100); |
| 853 | else |
| 854 | bgmac_speed(bgmac, bgmac->speed); |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */ |
| 859 | static void bgmac_chip_reset(struct bgmac *bgmac) |
| 860 | { |
| 861 | struct bcma_device *core = bgmac->core; |
| 862 | struct bcma_bus *bus = core->bus; |
| 863 | struct bcma_chipinfo *ci = &bus->chipinfo; |
| 864 | u32 flags = 0; |
| 865 | u32 iost; |
| 866 | int i; |
| 867 | |
| 868 | if (bcma_core_is_enabled(core)) { |
| 869 | if (!bgmac->stats_grabbed) { |
| 870 | /* bgmac_chip_stats_update(bgmac); */ |
| 871 | bgmac->stats_grabbed = true; |
| 872 | } |
| 873 | |
| 874 | for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) |
| 875 | bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]); |
| 876 | |
| 877 | bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); |
| 878 | udelay(1); |
| 879 | |
| 880 | for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) |
| 881 | bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]); |
| 882 | |
| 883 | /* TODO: Clear software multicast filter list */ |
| 884 | } |
| 885 | |
| 886 | iost = bcma_aread32(core, BCMA_IOST); |
| 887 | if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 10) || |
| 888 | (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) || |
| 889 | (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) |
| 890 | iost &= ~BGMAC_BCMA_IOST_ATTACHED; |
| 891 | |
| 892 | if (iost & BGMAC_BCMA_IOST_ATTACHED) { |
| 893 | flags = BGMAC_BCMA_IOCTL_SW_CLKEN; |
| 894 | if (!bgmac->has_robosw) |
| 895 | flags |= BGMAC_BCMA_IOCTL_SW_RESET; |
| 896 | } |
| 897 | |
| 898 | bcma_core_enable(core, flags); |
| 899 | |
| 900 | if (core->id.rev > 2) { |
| 901 | bgmac_set(bgmac, BCMA_CLKCTLST, 1 << 8); |
| 902 | bgmac_wait_value(bgmac->core, BCMA_CLKCTLST, 1 << 24, 1 << 24, |
| 903 | 1000); |
| 904 | } |
| 905 | |
| 906 | if (ci->id == BCMA_CHIP_ID_BCM5357 || ci->id == BCMA_CHIP_ID_BCM4749 || |
| 907 | ci->id == BCMA_CHIP_ID_BCM53572) { |
| 908 | struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc; |
| 909 | u8 et_swtype = 0; |
| 910 | u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY | |
Rafał Miłecki | 6a391e7 | 2013-09-15 00:22:47 +0200 | [diff] [blame] | 911 | BGMAC_CHIPCTL_1_IF_TYPE_MII; |
Hauke Mehrtens | 3647268 | 2013-09-15 22:49:08 +0200 | [diff] [blame^] | 912 | char buf[4]; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 913 | |
Hauke Mehrtens | 3647268 | 2013-09-15 22:49:08 +0200 | [diff] [blame^] | 914 | if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) { |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 915 | if (kstrtou8(buf, 0, &et_swtype)) |
| 916 | bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n", |
| 917 | buf); |
| 918 | et_swtype &= 0x0f; |
| 919 | et_swtype <<= 4; |
| 920 | sw_type = et_swtype; |
| 921 | } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 9) { |
| 922 | sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII; |
Hauke Mehrtens | b5a4c2f | 2013-02-06 04:44:57 +0000 | [diff] [blame] | 923 | } else if ((ci->id != BCMA_CHIP_ID_BCM53572 && ci->pkg == 10) || |
| 924 | (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) { |
| 925 | sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII | |
| 926 | BGMAC_CHIPCTL_1_SW_TYPE_RGMII; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 927 | } |
| 928 | bcma_chipco_chipctl_maskset(cc, 1, |
| 929 | ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK | |
| 930 | BGMAC_CHIPCTL_1_SW_TYPE_MASK), |
| 931 | sw_type); |
| 932 | } |
| 933 | |
| 934 | if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw) |
| 935 | bcma_awrite32(core, BCMA_IOCTL, |
| 936 | bcma_aread32(core, BCMA_IOCTL) & |
| 937 | ~BGMAC_BCMA_IOCTL_SW_RESET); |
| 938 | |
| 939 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset |
| 940 | * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine |
| 941 | * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to |
| 942 | * be keps until taking MAC out of the reset. |
| 943 | */ |
| 944 | bgmac_cmdcfg_maskset(bgmac, |
| 945 | ~(BGMAC_CMDCFG_TE | |
| 946 | BGMAC_CMDCFG_RE | |
| 947 | BGMAC_CMDCFG_RPI | |
| 948 | BGMAC_CMDCFG_TAI | |
| 949 | BGMAC_CMDCFG_HD | |
| 950 | BGMAC_CMDCFG_ML | |
| 951 | BGMAC_CMDCFG_CFE | |
| 952 | BGMAC_CMDCFG_RL | |
| 953 | BGMAC_CMDCFG_RED | |
| 954 | BGMAC_CMDCFG_PE | |
| 955 | BGMAC_CMDCFG_TPI | |
| 956 | BGMAC_CMDCFG_PAD_EN | |
| 957 | BGMAC_CMDCFG_PF), |
| 958 | BGMAC_CMDCFG_PROM | |
| 959 | BGMAC_CMDCFG_NLC | |
| 960 | BGMAC_CMDCFG_CFE | |
| 961 | BGMAC_CMDCFG_SR, |
| 962 | false); |
| 963 | |
| 964 | bgmac_clear_mib(bgmac); |
| 965 | if (core->id.id == BCMA_CORE_4706_MAC_GBIT) |
| 966 | bcma_maskset32(bgmac->cmn, BCMA_GMAC_CMN_PHY_CTL, ~0, |
| 967 | BCMA_GMAC_CMN_PC_MTE); |
| 968 | else |
| 969 | bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE); |
| 970 | bgmac_miiconfig(bgmac); |
| 971 | bgmac_phy_init(bgmac); |
| 972 | |
| 973 | bgmac->int_status = 0; |
| 974 | } |
| 975 | |
| 976 | static void bgmac_chip_intrs_on(struct bgmac *bgmac) |
| 977 | { |
| 978 | bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask); |
| 979 | } |
| 980 | |
| 981 | static void bgmac_chip_intrs_off(struct bgmac *bgmac) |
| 982 | { |
| 983 | bgmac_write(bgmac, BGMAC_INT_MASK, 0); |
Nathan Hintz | 4160815 | 2013-02-13 19:14:10 +0000 | [diff] [blame] | 984 | bgmac_read(bgmac, BGMAC_INT_MASK); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 985 | } |
| 986 | |
| 987 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */ |
| 988 | static void bgmac_enable(struct bgmac *bgmac) |
| 989 | { |
| 990 | struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo; |
| 991 | u32 cmdcfg; |
| 992 | u32 mode; |
| 993 | u32 rxq_ctl; |
| 994 | u32 fl_ctl; |
| 995 | u16 bp_clk; |
| 996 | u8 mdp; |
| 997 | |
| 998 | cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); |
| 999 | bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE), |
| 1000 | BGMAC_CMDCFG_SR, true); |
| 1001 | udelay(2); |
| 1002 | cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE; |
| 1003 | bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg); |
| 1004 | |
| 1005 | mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> |
| 1006 | BGMAC_DS_MM_SHIFT; |
| 1007 | if (ci->id != BCMA_CHIP_ID_BCM47162 || mode != 0) |
| 1008 | bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT); |
| 1009 | if (ci->id == BCMA_CHIP_ID_BCM47162 && mode == 2) |
| 1010 | bcma_chipco_chipctl_maskset(&bgmac->core->bus->drv_cc, 1, ~0, |
| 1011 | BGMAC_CHIPCTL_1_RXC_DLL_BYPASS); |
| 1012 | |
| 1013 | switch (ci->id) { |
| 1014 | case BCMA_CHIP_ID_BCM5357: |
| 1015 | case BCMA_CHIP_ID_BCM4749: |
| 1016 | case BCMA_CHIP_ID_BCM53572: |
| 1017 | case BCMA_CHIP_ID_BCM4716: |
| 1018 | case BCMA_CHIP_ID_BCM47162: |
| 1019 | fl_ctl = 0x03cb04cb; |
| 1020 | if (ci->id == BCMA_CHIP_ID_BCM5357 || |
| 1021 | ci->id == BCMA_CHIP_ID_BCM4749 || |
| 1022 | ci->id == BCMA_CHIP_ID_BCM53572) |
| 1023 | fl_ctl = 0x2300e1; |
| 1024 | bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl); |
| 1025 | bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff); |
| 1026 | break; |
| 1027 | } |
| 1028 | |
| 1029 | rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL); |
| 1030 | rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK; |
| 1031 | bp_clk = bcma_pmu_get_bus_clock(&bgmac->core->bus->drv_cc) / 1000000; |
| 1032 | mdp = (bp_clk * 128 / 1000) - 3; |
| 1033 | rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT); |
| 1034 | bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl); |
| 1035 | } |
| 1036 | |
| 1037 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */ |
| 1038 | static void bgmac_chip_init(struct bgmac *bgmac, bool full_init) |
| 1039 | { |
| 1040 | struct bgmac_dma_ring *ring; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1041 | int i; |
| 1042 | |
| 1043 | /* 1 interrupt per received frame */ |
| 1044 | bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT); |
| 1045 | |
| 1046 | /* Enable 802.3x tx flow control (honor received PAUSE frames) */ |
| 1047 | bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true); |
| 1048 | |
Hauke Mehrtens | c6edfe1 | 2013-02-06 05:51:49 +0000 | [diff] [blame] | 1049 | bgmac_set_rx_mode(bgmac->net_dev); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1050 | |
Hauke Mehrtens | 4e20900 | 2013-02-06 04:44:58 +0000 | [diff] [blame] | 1051 | bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1052 | |
| 1053 | if (bgmac->loopback) |
Rafał Miłecki | e9ba103 | 2013-02-07 05:40:38 +0000 | [diff] [blame] | 1054 | bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1055 | else |
Rafał Miłecki | e9ba103 | 2013-02-07 05:40:38 +0000 | [diff] [blame] | 1056 | bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1057 | |
| 1058 | bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN); |
| 1059 | |
| 1060 | if (!bgmac->autoneg) { |
| 1061 | bgmac_speed(bgmac, bgmac->speed); |
| 1062 | bgmac_phy_force(bgmac); |
| 1063 | } else if (bgmac->speed) { /* if there is anything to adv */ |
| 1064 | bgmac_phy_advertise(bgmac); |
| 1065 | } |
| 1066 | |
| 1067 | if (full_init) { |
| 1068 | bgmac_dma_init(bgmac); |
| 1069 | if (1) /* FIXME: is there any case we don't want IRQs? */ |
| 1070 | bgmac_chip_intrs_on(bgmac); |
| 1071 | } else { |
| 1072 | for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { |
| 1073 | ring = &bgmac->rx_ring[i]; |
| 1074 | bgmac_dma_rx_enable(bgmac, ring); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | bgmac_enable(bgmac); |
| 1079 | } |
| 1080 | |
| 1081 | static irqreturn_t bgmac_interrupt(int irq, void *dev_id) |
| 1082 | { |
| 1083 | struct bgmac *bgmac = netdev_priv(dev_id); |
| 1084 | |
| 1085 | u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS); |
| 1086 | int_status &= bgmac->int_mask; |
| 1087 | |
| 1088 | if (!int_status) |
| 1089 | return IRQ_NONE; |
| 1090 | |
| 1091 | /* Ack */ |
| 1092 | bgmac_write(bgmac, BGMAC_INT_STATUS, int_status); |
| 1093 | |
| 1094 | /* Disable new interrupts until handling existing ones */ |
| 1095 | bgmac_chip_intrs_off(bgmac); |
| 1096 | |
| 1097 | bgmac->int_status = int_status; |
| 1098 | |
| 1099 | napi_schedule(&bgmac->napi); |
| 1100 | |
| 1101 | return IRQ_HANDLED; |
| 1102 | } |
| 1103 | |
| 1104 | static int bgmac_poll(struct napi_struct *napi, int weight) |
| 1105 | { |
| 1106 | struct bgmac *bgmac = container_of(napi, struct bgmac, napi); |
| 1107 | struct bgmac_dma_ring *ring; |
| 1108 | int handled = 0; |
| 1109 | |
| 1110 | if (bgmac->int_status & BGMAC_IS_TX0) { |
| 1111 | ring = &bgmac->tx_ring[0]; |
| 1112 | bgmac_dma_tx_free(bgmac, ring); |
| 1113 | bgmac->int_status &= ~BGMAC_IS_TX0; |
| 1114 | } |
| 1115 | |
| 1116 | if (bgmac->int_status & BGMAC_IS_RX) { |
| 1117 | ring = &bgmac->rx_ring[0]; |
| 1118 | handled += bgmac_dma_rx_read(bgmac, ring, weight); |
| 1119 | bgmac->int_status &= ~BGMAC_IS_RX; |
| 1120 | } |
| 1121 | |
| 1122 | if (bgmac->int_status) { |
| 1123 | bgmac_err(bgmac, "Unknown IRQs: 0x%08X\n", bgmac->int_status); |
| 1124 | bgmac->int_status = 0; |
| 1125 | } |
| 1126 | |
| 1127 | if (handled < weight) |
| 1128 | napi_complete(napi); |
| 1129 | |
| 1130 | bgmac_chip_intrs_on(bgmac); |
| 1131 | |
| 1132 | return handled; |
| 1133 | } |
| 1134 | |
| 1135 | /************************************************** |
| 1136 | * net_device_ops |
| 1137 | **************************************************/ |
| 1138 | |
| 1139 | static int bgmac_open(struct net_device *net_dev) |
| 1140 | { |
| 1141 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1142 | int err = 0; |
| 1143 | |
| 1144 | bgmac_chip_reset(bgmac); |
| 1145 | /* Specs say about reclaiming rings here, but we do that in DMA init */ |
| 1146 | bgmac_chip_init(bgmac, true); |
| 1147 | |
| 1148 | err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED, |
| 1149 | KBUILD_MODNAME, net_dev); |
| 1150 | if (err < 0) { |
| 1151 | bgmac_err(bgmac, "IRQ request error: %d!\n", err); |
| 1152 | goto err_out; |
| 1153 | } |
| 1154 | napi_enable(&bgmac->napi); |
| 1155 | |
| 1156 | netif_carrier_on(net_dev); |
| 1157 | |
| 1158 | err_out: |
| 1159 | return err; |
| 1160 | } |
| 1161 | |
| 1162 | static int bgmac_stop(struct net_device *net_dev) |
| 1163 | { |
| 1164 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1165 | |
| 1166 | netif_carrier_off(net_dev); |
| 1167 | |
| 1168 | napi_disable(&bgmac->napi); |
| 1169 | bgmac_chip_intrs_off(bgmac); |
| 1170 | free_irq(bgmac->core->irq, net_dev); |
| 1171 | |
| 1172 | bgmac_chip_reset(bgmac); |
| 1173 | |
| 1174 | return 0; |
| 1175 | } |
| 1176 | |
| 1177 | static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb, |
| 1178 | struct net_device *net_dev) |
| 1179 | { |
| 1180 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1181 | struct bgmac_dma_ring *ring; |
| 1182 | |
| 1183 | /* No QOS support yet */ |
| 1184 | ring = &bgmac->tx_ring[0]; |
| 1185 | return bgmac_dma_tx_add(bgmac, ring, skb); |
| 1186 | } |
| 1187 | |
Hauke Mehrtens | 4e20900 | 2013-02-06 04:44:58 +0000 | [diff] [blame] | 1188 | static int bgmac_set_mac_address(struct net_device *net_dev, void *addr) |
| 1189 | { |
| 1190 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1191 | int ret; |
| 1192 | |
| 1193 | ret = eth_prepare_mac_addr_change(net_dev, addr); |
| 1194 | if (ret < 0) |
| 1195 | return ret; |
| 1196 | bgmac_write_mac_address(bgmac, (u8 *)addr); |
| 1197 | eth_commit_mac_addr_change(net_dev, addr); |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1201 | static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) |
| 1202 | { |
| 1203 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1204 | struct mii_ioctl_data *data = if_mii(ifr); |
| 1205 | |
| 1206 | switch (cmd) { |
| 1207 | case SIOCGMIIPHY: |
| 1208 | data->phy_id = bgmac->phyaddr; |
| 1209 | /* fallthru */ |
| 1210 | case SIOCGMIIREG: |
| 1211 | if (!netif_running(net_dev)) |
| 1212 | return -EAGAIN; |
| 1213 | data->val_out = bgmac_phy_read(bgmac, data->phy_id, |
| 1214 | data->reg_num & 0x1f); |
| 1215 | return 0; |
| 1216 | case SIOCSMIIREG: |
| 1217 | if (!netif_running(net_dev)) |
| 1218 | return -EAGAIN; |
| 1219 | bgmac_phy_write(bgmac, data->phy_id, data->reg_num & 0x1f, |
| 1220 | data->val_in); |
| 1221 | return 0; |
| 1222 | default: |
| 1223 | return -EOPNOTSUPP; |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | static const struct net_device_ops bgmac_netdev_ops = { |
| 1228 | .ndo_open = bgmac_open, |
| 1229 | .ndo_stop = bgmac_stop, |
| 1230 | .ndo_start_xmit = bgmac_start_xmit, |
Hauke Mehrtens | c6edfe1 | 2013-02-06 05:51:49 +0000 | [diff] [blame] | 1231 | .ndo_set_rx_mode = bgmac_set_rx_mode, |
Hauke Mehrtens | 4e20900 | 2013-02-06 04:44:58 +0000 | [diff] [blame] | 1232 | .ndo_set_mac_address = bgmac_set_mac_address, |
Hauke Mehrtens | 522c590 | 2013-02-06 04:44:59 +0000 | [diff] [blame] | 1233 | .ndo_validate_addr = eth_validate_addr, |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1234 | .ndo_do_ioctl = bgmac_ioctl, |
| 1235 | }; |
| 1236 | |
| 1237 | /************************************************** |
| 1238 | * ethtool_ops |
| 1239 | **************************************************/ |
| 1240 | |
| 1241 | static int bgmac_get_settings(struct net_device *net_dev, |
| 1242 | struct ethtool_cmd *cmd) |
| 1243 | { |
| 1244 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1245 | |
| 1246 | cmd->supported = SUPPORTED_10baseT_Half | |
| 1247 | SUPPORTED_10baseT_Full | |
| 1248 | SUPPORTED_100baseT_Half | |
| 1249 | SUPPORTED_100baseT_Full | |
| 1250 | SUPPORTED_1000baseT_Half | |
| 1251 | SUPPORTED_1000baseT_Full | |
| 1252 | SUPPORTED_Autoneg; |
| 1253 | |
| 1254 | if (bgmac->autoneg) { |
| 1255 | WARN_ON(cmd->advertising); |
| 1256 | if (bgmac->full_duplex) { |
| 1257 | if (bgmac->speed & BGMAC_SPEED_10) |
| 1258 | cmd->advertising |= ADVERTISED_10baseT_Full; |
| 1259 | if (bgmac->speed & BGMAC_SPEED_100) |
| 1260 | cmd->advertising |= ADVERTISED_100baseT_Full; |
| 1261 | if (bgmac->speed & BGMAC_SPEED_1000) |
| 1262 | cmd->advertising |= ADVERTISED_1000baseT_Full; |
| 1263 | } else { |
| 1264 | if (bgmac->speed & BGMAC_SPEED_10) |
| 1265 | cmd->advertising |= ADVERTISED_10baseT_Half; |
| 1266 | if (bgmac->speed & BGMAC_SPEED_100) |
| 1267 | cmd->advertising |= ADVERTISED_100baseT_Half; |
| 1268 | if (bgmac->speed & BGMAC_SPEED_1000) |
| 1269 | cmd->advertising |= ADVERTISED_1000baseT_Half; |
| 1270 | } |
| 1271 | } else { |
| 1272 | switch (bgmac->speed) { |
| 1273 | case BGMAC_SPEED_10: |
| 1274 | ethtool_cmd_speed_set(cmd, SPEED_10); |
| 1275 | break; |
| 1276 | case BGMAC_SPEED_100: |
| 1277 | ethtool_cmd_speed_set(cmd, SPEED_100); |
| 1278 | break; |
| 1279 | case BGMAC_SPEED_1000: |
| 1280 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
| 1281 | break; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | cmd->duplex = bgmac->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; |
| 1286 | |
| 1287 | cmd->autoneg = bgmac->autoneg; |
| 1288 | |
| 1289 | return 0; |
| 1290 | } |
| 1291 | |
| 1292 | #if 0 |
| 1293 | static int bgmac_set_settings(struct net_device *net_dev, |
| 1294 | struct ethtool_cmd *cmd) |
| 1295 | { |
| 1296 | struct bgmac *bgmac = netdev_priv(net_dev); |
| 1297 | |
| 1298 | return -1; |
| 1299 | } |
| 1300 | #endif |
| 1301 | |
| 1302 | static void bgmac_get_drvinfo(struct net_device *net_dev, |
| 1303 | struct ethtool_drvinfo *info) |
| 1304 | { |
| 1305 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
| 1306 | strlcpy(info->bus_info, "BCMA", sizeof(info->bus_info)); |
| 1307 | } |
| 1308 | |
| 1309 | static const struct ethtool_ops bgmac_ethtool_ops = { |
| 1310 | .get_settings = bgmac_get_settings, |
| 1311 | .get_drvinfo = bgmac_get_drvinfo, |
| 1312 | }; |
| 1313 | |
| 1314 | /************************************************** |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 1315 | * MII |
| 1316 | **************************************************/ |
| 1317 | |
| 1318 | static int bgmac_mii_read(struct mii_bus *bus, int mii_id, int regnum) |
| 1319 | { |
| 1320 | return bgmac_phy_read(bus->priv, mii_id, regnum); |
| 1321 | } |
| 1322 | |
| 1323 | static int bgmac_mii_write(struct mii_bus *bus, int mii_id, int regnum, |
| 1324 | u16 value) |
| 1325 | { |
| 1326 | return bgmac_phy_write(bus->priv, mii_id, regnum, value); |
| 1327 | } |
| 1328 | |
| 1329 | static int bgmac_mii_register(struct bgmac *bgmac) |
| 1330 | { |
| 1331 | struct mii_bus *mii_bus; |
| 1332 | int i, err = 0; |
| 1333 | |
| 1334 | mii_bus = mdiobus_alloc(); |
| 1335 | if (!mii_bus) |
| 1336 | return -ENOMEM; |
| 1337 | |
| 1338 | mii_bus->name = "bgmac mii bus"; |
| 1339 | sprintf(mii_bus->id, "%s-%d-%d", "bgmac", bgmac->core->bus->num, |
| 1340 | bgmac->core->core_unit); |
| 1341 | mii_bus->priv = bgmac; |
| 1342 | mii_bus->read = bgmac_mii_read; |
| 1343 | mii_bus->write = bgmac_mii_write; |
| 1344 | mii_bus->parent = &bgmac->core->dev; |
| 1345 | mii_bus->phy_mask = ~(1 << bgmac->phyaddr); |
| 1346 | |
| 1347 | mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL); |
| 1348 | if (!mii_bus->irq) { |
| 1349 | err = -ENOMEM; |
| 1350 | goto err_free_bus; |
| 1351 | } |
| 1352 | for (i = 0; i < PHY_MAX_ADDR; i++) |
| 1353 | mii_bus->irq[i] = PHY_POLL; |
| 1354 | |
| 1355 | err = mdiobus_register(mii_bus); |
| 1356 | if (err) { |
| 1357 | bgmac_err(bgmac, "Registration of mii bus failed\n"); |
| 1358 | goto err_free_irq; |
| 1359 | } |
| 1360 | |
| 1361 | bgmac->mii_bus = mii_bus; |
| 1362 | |
| 1363 | return err; |
| 1364 | |
| 1365 | err_free_irq: |
| 1366 | kfree(mii_bus->irq); |
| 1367 | err_free_bus: |
| 1368 | mdiobus_free(mii_bus); |
| 1369 | return err; |
| 1370 | } |
| 1371 | |
| 1372 | static void bgmac_mii_unregister(struct bgmac *bgmac) |
| 1373 | { |
| 1374 | struct mii_bus *mii_bus = bgmac->mii_bus; |
| 1375 | |
| 1376 | mdiobus_unregister(mii_bus); |
| 1377 | kfree(mii_bus->irq); |
| 1378 | mdiobus_free(mii_bus); |
| 1379 | } |
| 1380 | |
| 1381 | /************************************************** |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1382 | * BCMA bus ops |
| 1383 | **************************************************/ |
| 1384 | |
| 1385 | /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */ |
| 1386 | static int bgmac_probe(struct bcma_device *core) |
| 1387 | { |
| 1388 | struct net_device *net_dev; |
| 1389 | struct bgmac *bgmac; |
| 1390 | struct ssb_sprom *sprom = &core->bus->sprom; |
| 1391 | u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac; |
| 1392 | int err; |
| 1393 | |
| 1394 | /* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */ |
| 1395 | if (core->core_unit > 1) { |
| 1396 | pr_err("Unsupported core_unit %d\n", core->core_unit); |
| 1397 | return -ENOTSUPP; |
| 1398 | } |
| 1399 | |
Rafał Miłecki | d166f21 | 2013-02-07 00:27:17 +0000 | [diff] [blame] | 1400 | if (!is_valid_ether_addr(mac)) { |
| 1401 | dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac); |
| 1402 | eth_random_addr(mac); |
| 1403 | dev_warn(&core->dev, "Using random MAC: %pM\n", mac); |
| 1404 | } |
| 1405 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1406 | /* Allocation and references */ |
| 1407 | net_dev = alloc_etherdev(sizeof(*bgmac)); |
| 1408 | if (!net_dev) |
| 1409 | return -ENOMEM; |
| 1410 | net_dev->netdev_ops = &bgmac_netdev_ops; |
| 1411 | net_dev->irq = core->irq; |
| 1412 | SET_ETHTOOL_OPS(net_dev, &bgmac_ethtool_ops); |
| 1413 | bgmac = netdev_priv(net_dev); |
| 1414 | bgmac->net_dev = net_dev; |
| 1415 | bgmac->core = core; |
| 1416 | bcma_set_drvdata(core, bgmac); |
| 1417 | |
| 1418 | /* Defaults */ |
| 1419 | bgmac->autoneg = true; |
| 1420 | bgmac->full_duplex = true; |
| 1421 | bgmac->speed = BGMAC_SPEED_10 | BGMAC_SPEED_100 | BGMAC_SPEED_1000; |
| 1422 | memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN); |
| 1423 | |
| 1424 | /* On BCM4706 we need common core to access PHY */ |
| 1425 | if (core->id.id == BCMA_CORE_4706_MAC_GBIT && |
| 1426 | !core->bus->drv_gmac_cmn.core) { |
| 1427 | bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n"); |
| 1428 | err = -ENODEV; |
| 1429 | goto err_netdev_free; |
| 1430 | } |
| 1431 | bgmac->cmn = core->bus->drv_gmac_cmn.core; |
| 1432 | |
| 1433 | bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr : |
| 1434 | sprom->et0phyaddr; |
| 1435 | bgmac->phyaddr &= BGMAC_PHY_MASK; |
| 1436 | if (bgmac->phyaddr == BGMAC_PHY_MASK) { |
| 1437 | bgmac_err(bgmac, "No PHY found\n"); |
| 1438 | err = -ENODEV; |
| 1439 | goto err_netdev_free; |
| 1440 | } |
| 1441 | bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr, |
| 1442 | bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : ""); |
| 1443 | |
| 1444 | if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) { |
| 1445 | bgmac_err(bgmac, "PCI setup not implemented\n"); |
| 1446 | err = -ENOTSUPP; |
| 1447 | goto err_netdev_free; |
| 1448 | } |
| 1449 | |
| 1450 | bgmac_chip_reset(bgmac); |
| 1451 | |
| 1452 | err = bgmac_dma_alloc(bgmac); |
| 1453 | if (err) { |
| 1454 | bgmac_err(bgmac, "Unable to alloc memory for DMA\n"); |
| 1455 | goto err_netdev_free; |
| 1456 | } |
| 1457 | |
| 1458 | bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK; |
Ralf Baechle | edb15d8 | 2013-02-21 16:16:55 +0100 | [diff] [blame] | 1459 | if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0) |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1460 | bgmac->int_mask &= ~BGMAC_IS_TX_MASK; |
| 1461 | |
| 1462 | /* TODO: reset the external phy. Specs are needed */ |
| 1463 | bgmac_phy_reset(bgmac); |
| 1464 | |
| 1465 | bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo & |
| 1466 | BGMAC_BFL_ENETROBO); |
| 1467 | if (bgmac->has_robosw) |
| 1468 | bgmac_warn(bgmac, "Support for Roboswitch not implemented\n"); |
| 1469 | |
| 1470 | if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM) |
| 1471 | bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n"); |
| 1472 | |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 1473 | err = bgmac_mii_register(bgmac); |
| 1474 | if (err) { |
| 1475 | bgmac_err(bgmac, "Cannot register MDIO\n"); |
| 1476 | err = -ENOTSUPP; |
| 1477 | goto err_dma_free; |
| 1478 | } |
| 1479 | |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1480 | err = register_netdev(bgmac->net_dev); |
| 1481 | if (err) { |
| 1482 | bgmac_err(bgmac, "Cannot register net device\n"); |
| 1483 | err = -ENOTSUPP; |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 1484 | goto err_mii_unregister; |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | netif_carrier_off(net_dev); |
| 1488 | |
| 1489 | netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT); |
| 1490 | |
| 1491 | return 0; |
| 1492 | |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 1493 | err_mii_unregister: |
| 1494 | bgmac_mii_unregister(bgmac); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1495 | err_dma_free: |
| 1496 | bgmac_dma_free(bgmac); |
| 1497 | |
| 1498 | err_netdev_free: |
| 1499 | bcma_set_drvdata(core, NULL); |
| 1500 | free_netdev(net_dev); |
| 1501 | |
| 1502 | return err; |
| 1503 | } |
| 1504 | |
| 1505 | static void bgmac_remove(struct bcma_device *core) |
| 1506 | { |
| 1507 | struct bgmac *bgmac = bcma_get_drvdata(core); |
| 1508 | |
| 1509 | netif_napi_del(&bgmac->napi); |
| 1510 | unregister_netdev(bgmac->net_dev); |
Rafał Miłecki | 11e5e76 | 2013-03-07 01:53:28 +0000 | [diff] [blame] | 1511 | bgmac_mii_unregister(bgmac); |
Rafał Miłecki | dd4544f | 2013-01-08 20:06:23 +0000 | [diff] [blame] | 1512 | bgmac_dma_free(bgmac); |
| 1513 | bcma_set_drvdata(core, NULL); |
| 1514 | free_netdev(bgmac->net_dev); |
| 1515 | } |
| 1516 | |
| 1517 | static struct bcma_driver bgmac_bcma_driver = { |
| 1518 | .name = KBUILD_MODNAME, |
| 1519 | .id_table = bgmac_bcma_tbl, |
| 1520 | .probe = bgmac_probe, |
| 1521 | .remove = bgmac_remove, |
| 1522 | }; |
| 1523 | |
| 1524 | static int __init bgmac_init(void) |
| 1525 | { |
| 1526 | int err; |
| 1527 | |
| 1528 | err = bcma_driver_register(&bgmac_bcma_driver); |
| 1529 | if (err) |
| 1530 | return err; |
| 1531 | pr_info("Broadcom 47xx GBit MAC driver loaded\n"); |
| 1532 | |
| 1533 | return 0; |
| 1534 | } |
| 1535 | |
| 1536 | static void __exit bgmac_exit(void) |
| 1537 | { |
| 1538 | bcma_driver_unregister(&bgmac_bcma_driver); |
| 1539 | } |
| 1540 | |
| 1541 | module_init(bgmac_init) |
| 1542 | module_exit(bgmac_exit) |
| 1543 | |
| 1544 | MODULE_AUTHOR("Rafał Miłecki"); |
| 1545 | MODULE_LICENSE("GPL"); |