1 /* 2 * ks8842.c timberdale KS8842 ethernet driver 3 * Copyright (c) 2009 Intel Corporation 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 /* Supports: 20 * The Micrel KS8842 behind the timberdale FPGA 21 * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #include <linux/interrupt.h> 27 #include <linux/kernel.h> 28 #include <linux/module.h> 29 #include <linux/platform_device.h> 30 #include <linux/netdevice.h> 31 #include <linux/etherdevice.h> 32 #include <linux/ethtool.h> 33 #include <linux/ks8842.h> 34 #include <linux/dmaengine.h> 35 #include <linux/dma-mapping.h> 36 #include <linux/scatterlist.h> 37 38 #define DRV_NAME "ks8842" 39 40 /* Timberdale specific Registers */ 41 #define REG_TIMB_RST 0x1c 42 #define REG_TIMB_FIFO 0x20 43 #define REG_TIMB_ISR 0x24 44 #define REG_TIMB_IER 0x28 45 #define REG_TIMB_IAR 0x2C 46 #define REQ_TIMB_DMA_RESUME 0x30 47 48 /* KS8842 registers */ 49 50 #define REG_SELECT_BANK 0x0e 51 52 /* bank 0 registers */ 53 #define REG_QRFCR 0x04 54 55 /* bank 2 registers */ 56 #define REG_MARL 0x00 57 #define REG_MARM 0x02 58 #define REG_MARH 0x04 59 60 /* bank 3 registers */ 61 #define REG_GRR 0x06 62 63 /* bank 16 registers */ 64 #define REG_TXCR 0x00 65 #define REG_TXSR 0x02 66 #define REG_RXCR 0x04 67 #define REG_TXMIR 0x08 68 #define REG_RXMIR 0x0A 69 70 /* bank 17 registers */ 71 #define REG_TXQCR 0x00 72 #define REG_RXQCR 0x02 73 #define REG_TXFDPR 0x04 74 #define REG_RXFDPR 0x06 75 #define REG_QMU_DATA_LO 0x08 76 #define REG_QMU_DATA_HI 0x0A 77 78 /* bank 18 registers */ 79 #define REG_IER 0x00 80 #define IRQ_LINK_CHANGE 0x8000 81 #define IRQ_TX 0x4000 82 #define IRQ_RX 0x2000 83 #define IRQ_RX_OVERRUN 0x0800 84 #define IRQ_TX_STOPPED 0x0200 85 #define IRQ_RX_STOPPED 0x0100 86 #define IRQ_RX_ERROR 0x0080 87 #define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \ 88 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) 89 /* When running via timberdale in DMA mode, the RX interrupt should be 90 enabled in the KS8842, but not in the FPGA IP, since the IP handles 91 RX DMA internally. 92 TX interrupts are not needed it is handled by the FPGA the driver is 93 notified via DMA callbacks. 94 */ 95 #define ENABLED_IRQS_DMA_IP (IRQ_LINK_CHANGE | IRQ_RX_STOPPED | \ 96 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) 97 #define ENABLED_IRQS_DMA (ENABLED_IRQS_DMA_IP | IRQ_RX) 98 #define REG_ISR 0x02 99 #define REG_RXSR 0x04 100 #define RXSR_VALID 0x8000 101 #define RXSR_BROADCAST 0x80 102 #define RXSR_MULTICAST 0x40 103 #define RXSR_UNICAST 0x20 104 #define RXSR_FRAMETYPE 0x08 105 #define RXSR_TOO_LONG 0x04 106 #define RXSR_RUNT 0x02 107 #define RXSR_CRC_ERROR 0x01 108 #define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR) 109 110 /* bank 32 registers */ 111 #define REG_SW_ID_AND_ENABLE 0x00 112 #define REG_SGCR1 0x02 113 #define REG_SGCR2 0x04 114 #define REG_SGCR3 0x06 115 116 /* bank 39 registers */ 117 #define REG_MACAR1 0x00 118 #define REG_MACAR2 0x02 119 #define REG_MACAR3 0x04 120 121 /* bank 45 registers */ 122 #define REG_P1MBCR 0x00 123 #define REG_P1MBSR 0x02 124 125 /* bank 46 registers */ 126 #define REG_P2MBCR 0x00 127 #define REG_P2MBSR 0x02 128 129 /* bank 48 registers */ 130 #define REG_P1CR2 0x02 131 132 /* bank 49 registers */ 133 #define REG_P1CR4 0x02 134 #define REG_P1SR 0x04 135 136 /* flags passed by platform_device for configuration */ 137 #define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */ 138 #define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */ 139 140 #define DMA_BUFFER_SIZE 2048 141 142 struct ks8842_tx_dma_ctl { 143 struct dma_chan *chan; 144 struct dma_async_tx_descriptor *adesc; 145 void *buf; 146 struct scatterlist sg; 147 int channel; 148 }; 149 150 struct ks8842_rx_dma_ctl { 151 struct dma_chan *chan; 152 struct dma_async_tx_descriptor *adesc; 153 struct sk_buff *skb; 154 struct scatterlist sg; 155 struct tasklet_struct tasklet; 156 int channel; 157 }; 158 159 #define KS8842_USE_DMA(adapter) (((adapter)->dma_tx.channel != -1) && \ 160 ((adapter)->dma_rx.channel != -1)) 161 162 struct ks8842_adapter { 163 void __iomem *hw_addr; 164 int irq; 165 unsigned long conf_flags; /* copy of platform_device config */ 166 struct tasklet_struct tasklet; 167 spinlock_t lock; /* spinlock to be interrupt safe */ 168 struct work_struct timeout_work; 169 struct net_device *netdev; 170 struct device *dev; 171 struct ks8842_tx_dma_ctl dma_tx; 172 struct ks8842_rx_dma_ctl dma_rx; 173 }; 174 175 static void ks8842_dma_rx_cb(void *data); 176 static void ks8842_dma_tx_cb(void *data); 177 178 static inline void ks8842_resume_dma(struct ks8842_adapter *adapter) 179 { 180 iowrite32(1, adapter->hw_addr + REQ_TIMB_DMA_RESUME); 181 } 182 183 static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank) 184 { 185 iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK); 186 } 187 188 static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank, 189 u8 value, int offset) 190 { 191 ks8842_select_bank(adapter, bank); 192 iowrite8(value, adapter->hw_addr + offset); 193 } 194 195 static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank, 196 u16 value, int offset) 197 { 198 ks8842_select_bank(adapter, bank); 199 iowrite16(value, adapter->hw_addr + offset); 200 } 201 202 static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank, 203 u16 bits, int offset) 204 { 205 u16 reg; 206 ks8842_select_bank(adapter, bank); 207 reg = ioread16(adapter->hw_addr + offset); 208 reg |= bits; 209 iowrite16(reg, adapter->hw_addr + offset); 210 } 211 212 static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank, 213 u16 bits, int offset) 214 { 215 u16 reg; 216 ks8842_select_bank(adapter, bank); 217 reg = ioread16(adapter->hw_addr + offset); 218 reg &= ~bits; 219 iowrite16(reg, adapter->hw_addr + offset); 220 } 221 222 static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank, 223 u32 value, int offset) 224 { 225 ks8842_select_bank(adapter, bank); 226 iowrite32(value, adapter->hw_addr + offset); 227 } 228 229 static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank, 230 int offset) 231 { 232 ks8842_select_bank(adapter, bank); 233 return ioread8(adapter->hw_addr + offset); 234 } 235 236 static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank, 237 int offset) 238 { 239 ks8842_select_bank(adapter, bank); 240 return ioread16(adapter->hw_addr + offset); 241 } 242 243 static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, 244 int offset) 245 { 246 ks8842_select_bank(adapter, bank); 247 return ioread32(adapter->hw_addr + offset); 248 } 249 250 static void ks8842_reset(struct ks8842_adapter *adapter) 251 { 252 if (adapter->conf_flags & MICREL_KS884X) { 253 ks8842_write16(adapter, 3, 1, REG_GRR); 254 msleep(10); 255 iowrite16(0, adapter->hw_addr + REG_GRR); 256 } else { 257 /* The KS8842 goes haywire when doing softare reset 258 * a work around in the timberdale IP is implemented to 259 * do a hardware reset instead 260 ks8842_write16(adapter, 3, 1, REG_GRR); 261 msleep(10); 262 iowrite16(0, adapter->hw_addr + REG_GRR); 263 */ 264 iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); 265 msleep(20); 266 } 267 } 268 269 static void ks8842_update_link_status(struct net_device *netdev, 270 struct ks8842_adapter *adapter) 271 { 272 /* check the status of the link */ 273 if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) { 274 netif_carrier_on(netdev); 275 netif_wake_queue(netdev); 276 } else { 277 netif_stop_queue(netdev); 278 netif_carrier_off(netdev); 279 } 280 } 281 282 static void ks8842_enable_tx(struct ks8842_adapter *adapter) 283 { 284 ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR); 285 } 286 287 static void ks8842_disable_tx(struct ks8842_adapter *adapter) 288 { 289 ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR); 290 } 291 292 static void ks8842_enable_rx(struct ks8842_adapter *adapter) 293 { 294 ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR); 295 } 296 297 static void ks8842_disable_rx(struct ks8842_adapter *adapter) 298 { 299 ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR); 300 } 301 302 static void ks8842_reset_hw(struct ks8842_adapter *adapter) 303 { 304 /* reset the HW */ 305 ks8842_reset(adapter); 306 307 /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */ 308 ks8842_write16(adapter, 16, 0x000E, REG_TXCR); 309 310 /* enable the receiver, uni + multi + broadcast + flow ctrl 311 + crc strip */ 312 ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400, 313 REG_RXCR); 314 315 /* TX frame pointer autoincrement */ 316 ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR); 317 318 /* RX frame pointer autoincrement */ 319 ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR); 320 321 /* RX 2 kb high watermark */ 322 ks8842_write16(adapter, 0, 0x1000, REG_QRFCR); 323 324 /* aggressive back off in half duplex */ 325 ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1); 326 327 /* enable no excessive collison drop */ 328 ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2); 329 330 /* Enable port 1 force flow control / back pressure / transmit / recv */ 331 ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2); 332 333 /* restart port auto-negotiation */ 334 ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); 335 336 /* Enable the transmitter */ 337 ks8842_enable_tx(adapter); 338 339 /* Enable the receiver */ 340 ks8842_enable_rx(adapter); 341 342 /* clear all interrupts */ 343 ks8842_write16(adapter, 18, 0xffff, REG_ISR); 344 345 /* enable interrupts */ 346 if (KS8842_USE_DMA(adapter)) { 347 /* When running in DMA Mode the RX interrupt is not enabled in 348 timberdale because RX data is received by DMA callbacks 349 it must still be enabled in the KS8842 because it indicates 350 to timberdale when there is RX data for it's DMA FIFOs */ 351 iowrite16(ENABLED_IRQS_DMA_IP, adapter->hw_addr + REG_TIMB_IER); 352 ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); 353 } else { 354 if (!(adapter->conf_flags & MICREL_KS884X)) 355 iowrite16(ENABLED_IRQS, 356 adapter->hw_addr + REG_TIMB_IER); 357 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); 358 } 359 /* enable the switch */ 360 ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE); 361 } 362 363 static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) 364 { 365 int i; 366 u16 mac; 367 368 for (i = 0; i < ETH_ALEN; i++) 369 dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); 370 371 if (adapter->conf_flags & MICREL_KS884X) { 372 /* 373 the sequence of saving mac addr between MAC and Switch is 374 different. 375 */ 376 377 mac = ks8842_read16(adapter, 2, REG_MARL); 378 ks8842_write16(adapter, 39, mac, REG_MACAR3); 379 mac = ks8842_read16(adapter, 2, REG_MARM); 380 ks8842_write16(adapter, 39, mac, REG_MACAR2); 381 mac = ks8842_read16(adapter, 2, REG_MARH); 382 ks8842_write16(adapter, 39, mac, REG_MACAR1); 383 } else { 384 385 /* make sure the switch port uses the same MAC as the QMU */ 386 mac = ks8842_read16(adapter, 2, REG_MARL); 387 ks8842_write16(adapter, 39, mac, REG_MACAR1); 388 mac = ks8842_read16(adapter, 2, REG_MARM); 389 ks8842_write16(adapter, 39, mac, REG_MACAR2); 390 mac = ks8842_read16(adapter, 2, REG_MARH); 391 ks8842_write16(adapter, 39, mac, REG_MACAR3); 392 } 393 } 394 395 static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) 396 { 397 unsigned long flags; 398 unsigned i; 399 400 spin_lock_irqsave(&adapter->lock, flags); 401 for (i = 0; i < ETH_ALEN; i++) { 402 ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); 403 if (!(adapter->conf_flags & MICREL_KS884X)) 404 ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], 405 REG_MACAR1 + i); 406 } 407 408 if (adapter->conf_flags & MICREL_KS884X) { 409 /* 410 the sequence of saving mac addr between MAC and Switch is 411 different. 412 */ 413 414 u16 mac; 415 416 mac = ks8842_read16(adapter, 2, REG_MARL); 417 ks8842_write16(adapter, 39, mac, REG_MACAR3); 418 mac = ks8842_read16(adapter, 2, REG_MARM); 419 ks8842_write16(adapter, 39, mac, REG_MACAR2); 420 mac = ks8842_read16(adapter, 2, REG_MARH); 421 ks8842_write16(adapter, 39, mac, REG_MACAR1); 422 } 423 spin_unlock_irqrestore(&adapter->lock, flags); 424 } 425 426 static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter) 427 { 428 return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff; 429 } 430 431 static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev) 432 { 433 struct ks8842_adapter *adapter = netdev_priv(netdev); 434 struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; 435 u8 *buf = ctl->buf; 436 437 if (ctl->adesc) { 438 netdev_dbg(netdev, "%s: TX ongoing\n", __func__); 439 /* transfer ongoing */ 440 return NETDEV_TX_BUSY; 441 } 442 443 sg_dma_len(&ctl->sg) = skb->len + sizeof(u32); 444 445 /* copy data to the TX buffer */ 446 /* the control word, enable IRQ, port 1 and the length */ 447 *buf++ = 0x00; 448 *buf++ = 0x01; /* Port 1 */ 449 *buf++ = skb->len & 0xff; 450 *buf++ = (skb->len >> 8) & 0xff; 451 skb_copy_from_linear_data(skb, buf, skb->len); 452 453 dma_sync_single_range_for_device(adapter->dev, 454 sg_dma_address(&ctl->sg), 0, sg_dma_len(&ctl->sg), 455 DMA_TO_DEVICE); 456 457 /* make sure the length is a multiple of 4 */ 458 if (sg_dma_len(&ctl->sg) % 4) 459 sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4; 460 461 ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, 462 &ctl->sg, 1, DMA_MEM_TO_DEV, 463 DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP); 464 if (!ctl->adesc) 465 return NETDEV_TX_BUSY; 466 467 ctl->adesc->callback_param = netdev; 468 ctl->adesc->callback = ks8842_dma_tx_cb; 469 ctl->adesc->tx_submit(ctl->adesc); 470 471 netdev->stats.tx_bytes += skb->len; 472 473 dev_kfree_skb(skb); 474 475 return NETDEV_TX_OK; 476 } 477 478 static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) 479 { 480 struct ks8842_adapter *adapter = netdev_priv(netdev); 481 int len = skb->len; 482 483 netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n", 484 __func__, skb->len, skb->head, skb->data, 485 skb_tail_pointer(skb), skb_end_pointer(skb)); 486 487 /* check FIFO buffer space, we need space for CRC and command bits */ 488 if (ks8842_tx_fifo_space(adapter) < len + 8) 489 return NETDEV_TX_BUSY; 490 491 if (adapter->conf_flags & KS884X_16BIT) { 492 u16 *ptr16 = (u16 *)skb->data; 493 ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO); 494 ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI); 495 netdev->stats.tx_bytes += len; 496 497 /* copy buffer */ 498 while (len > 0) { 499 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO); 500 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI); 501 len -= sizeof(u32); 502 } 503 } else { 504 505 u32 *ptr = (u32 *)skb->data; 506 u32 ctrl; 507 /* the control word, enable IRQ, port 1 and the length */ 508 ctrl = 0x8000 | 0x100 | (len << 16); 509 ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); 510 511 netdev->stats.tx_bytes += len; 512 513 /* copy buffer */ 514 while (len > 0) { 515 iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); 516 len -= sizeof(u32); 517 ptr++; 518 } 519 } 520 521 /* enqueue packet */ 522 ks8842_write16(adapter, 17, 1, REG_TXQCR); 523 524 dev_kfree_skb(skb); 525 526 return NETDEV_TX_OK; 527 } 528 529 static void ks8842_update_rx_err_counters(struct net_device *netdev, u32 status) 530 { 531 netdev_dbg(netdev, "RX error, status: %x\n", status); 532 533 netdev->stats.rx_errors++; 534 if (status & RXSR_TOO_LONG) 535 netdev->stats.rx_length_errors++; 536 if (status & RXSR_CRC_ERROR) 537 netdev->stats.rx_crc_errors++; 538 if (status & RXSR_RUNT) 539 netdev->stats.rx_frame_errors++; 540 } 541 542 static void ks8842_update_rx_counters(struct net_device *netdev, u32 status, 543 int len) 544 { 545 netdev_dbg(netdev, "RX packet, len: %d\n", len); 546 547 netdev->stats.rx_packets++; 548 netdev->stats.rx_bytes += len; 549 if (status & RXSR_MULTICAST) 550 netdev->stats.multicast++; 551 } 552 553 static int __ks8842_start_new_rx_dma(struct net_device *netdev) 554 { 555 struct ks8842_adapter *adapter = netdev_priv(netdev); 556 struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; 557 struct scatterlist *sg = &ctl->sg; 558 int err; 559 560 ctl->skb = netdev_alloc_skb(netdev, DMA_BUFFER_SIZE); 561 if (ctl->skb) { 562 sg_init_table(sg, 1); 563 sg_dma_address(sg) = dma_map_single(adapter->dev, 564 ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); 565 err = dma_mapping_error(adapter->dev, sg_dma_address(sg)); 566 if (unlikely(err)) { 567 sg_dma_address(sg) = 0; 568 goto out; 569 } 570 571 sg_dma_len(sg) = DMA_BUFFER_SIZE; 572 573 ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, 574 sg, 1, DMA_DEV_TO_MEM, 575 DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP); 576 577 if (!ctl->adesc) 578 goto out; 579 580 ctl->adesc->callback_param = netdev; 581 ctl->adesc->callback = ks8842_dma_rx_cb; 582 ctl->adesc->tx_submit(ctl->adesc); 583 } else { 584 err = -ENOMEM; 585 sg_dma_address(sg) = 0; 586 goto out; 587 } 588 589 return err; 590 out: 591 if (sg_dma_address(sg)) 592 dma_unmap_single(adapter->dev, sg_dma_address(sg), 593 DMA_BUFFER_SIZE, DMA_FROM_DEVICE); 594 sg_dma_address(sg) = 0; 595 if (ctl->skb) 596 dev_kfree_skb(ctl->skb); 597 598 ctl->skb = NULL; 599 600 printk(KERN_ERR DRV_NAME": Failed to start RX DMA: %d\n", err); 601 return err; 602 } 603 604 static void ks8842_rx_frame_dma_tasklet(unsigned long arg) 605 { 606 struct net_device *netdev = (struct net_device *)arg; 607 struct ks8842_adapter *adapter = netdev_priv(netdev); 608 struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; 609 struct sk_buff *skb = ctl->skb; 610 dma_addr_t addr = sg_dma_address(&ctl->sg); 611 u32 status; 612 613 ctl->adesc = NULL; 614 615 /* kick next transfer going */ 616 __ks8842_start_new_rx_dma(netdev); 617 618 /* now handle the data we got */ 619 dma_unmap_single(adapter->dev, addr, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); 620 621 status = *((u32 *)skb->data); 622 623 netdev_dbg(netdev, "%s - rx_data: status: %x\n", 624 __func__, status & 0xffff); 625 626 /* check the status */ 627 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { 628 int len = (status >> 16) & 0x7ff; 629 630 ks8842_update_rx_counters(netdev, status, len); 631 632 /* reserve 4 bytes which is the status word */ 633 skb_reserve(skb, 4); 634 skb_put(skb, len); 635 636 skb->protocol = eth_type_trans(skb, netdev); 637 netif_rx(skb); 638 } else { 639 ks8842_update_rx_err_counters(netdev, status); 640 dev_kfree_skb(skb); 641 } 642 } 643 644 static void ks8842_rx_frame(struct net_device *netdev, 645 struct ks8842_adapter *adapter) 646 { 647 u32 status; 648 int len; 649 650 if (adapter->conf_flags & KS884X_16BIT) { 651 status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO); 652 len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI); 653 netdev_dbg(netdev, "%s - rx_data: status: %x\n", 654 __func__, status); 655 } else { 656 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); 657 len = (status >> 16) & 0x7ff; 658 status &= 0xffff; 659 netdev_dbg(netdev, "%s - rx_data: status: %x\n", 660 __func__, status); 661 } 662 663 /* check the status */ 664 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { 665 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len + 3); 666 667 if (skb) { 668 669 ks8842_update_rx_counters(netdev, status, len); 670 671 if (adapter->conf_flags & KS884X_16BIT) { 672 u16 *data16 = (u16 *)skb_put(skb, len); 673 ks8842_select_bank(adapter, 17); 674 while (len > 0) { 675 *data16++ = ioread16(adapter->hw_addr + 676 REG_QMU_DATA_LO); 677 *data16++ = ioread16(adapter->hw_addr + 678 REG_QMU_DATA_HI); 679 len -= sizeof(u32); 680 } 681 } else { 682 u32 *data = (u32 *)skb_put(skb, len); 683 684 ks8842_select_bank(adapter, 17); 685 while (len > 0) { 686 *data++ = ioread32(adapter->hw_addr + 687 REG_QMU_DATA_LO); 688 len -= sizeof(u32); 689 } 690 } 691 skb->protocol = eth_type_trans(skb, netdev); 692 netif_rx(skb); 693 } else 694 netdev->stats.rx_dropped++; 695 } else 696 ks8842_update_rx_err_counters(netdev, status); 697 698 /* set high watermark to 3K */ 699 ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR); 700 701 /* release the frame */ 702 ks8842_write16(adapter, 17, 0x01, REG_RXQCR); 703 704 /* set high watermark to 2K */ 705 ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR); 706 } 707 708 static void ks8842_handle_rx(struct net_device *netdev, 709 struct ks8842_adapter *adapter) 710 { 711 u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; 712 netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data); 713 while (rx_data) { 714 ks8842_rx_frame(netdev, adapter); 715 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; 716 } 717 } 718 719 static void ks8842_handle_tx(struct net_device *netdev, 720 struct ks8842_adapter *adapter) 721 { 722 u16 sr = ks8842_read16(adapter, 16, REG_TXSR); 723 netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr); 724 netdev->stats.tx_packets++; 725 if (netif_queue_stopped(netdev)) 726 netif_wake_queue(netdev); 727 } 728 729 static void ks8842_handle_rx_overrun(struct net_device *netdev, 730 struct ks8842_adapter *adapter) 731 { 732 netdev_dbg(netdev, "%s: entry\n", __func__); 733 netdev->stats.rx_errors++; 734 netdev->stats.rx_fifo_errors++; 735 } 736 737 static void ks8842_tasklet(unsigned long arg) 738 { 739 struct net_device *netdev = (struct net_device *)arg; 740 struct ks8842_adapter *adapter = netdev_priv(netdev); 741 u16 isr; 742 unsigned long flags; 743 u16 entry_bank; 744 745 /* read current bank to be able to set it back */ 746 spin_lock_irqsave(&adapter->lock, flags); 747 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); 748 spin_unlock_irqrestore(&adapter->lock, flags); 749 750 isr = ks8842_read16(adapter, 18, REG_ISR); 751 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); 752 753 /* when running in DMA mode, do not ack RX interrupts, it is handled 754 internally by timberdale, otherwise it's DMA FIFO:s would stop 755 */ 756 if (KS8842_USE_DMA(adapter)) 757 isr &= ~IRQ_RX; 758 759 /* Ack */ 760 ks8842_write16(adapter, 18, isr, REG_ISR); 761 762 if (!(adapter->conf_flags & MICREL_KS884X)) 763 /* Ack in the timberdale IP as well */ 764 iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR); 765 766 if (!netif_running(netdev)) 767 return; 768 769 if (isr & IRQ_LINK_CHANGE) 770 ks8842_update_link_status(netdev, adapter); 771 772 /* should not get IRQ_RX when running DMA mode */ 773 if (isr & (IRQ_RX | IRQ_RX_ERROR) && !KS8842_USE_DMA(adapter)) 774 ks8842_handle_rx(netdev, adapter); 775 776 /* should only happen when in PIO mode */ 777 if (isr & IRQ_TX) 778 ks8842_handle_tx(netdev, adapter); 779 780 if (isr & IRQ_RX_OVERRUN) 781 ks8842_handle_rx_overrun(netdev, adapter); 782 783 if (isr & IRQ_TX_STOPPED) { 784 ks8842_disable_tx(adapter); 785 ks8842_enable_tx(adapter); 786 } 787 788 if (isr & IRQ_RX_STOPPED) { 789 ks8842_disable_rx(adapter); 790 ks8842_enable_rx(adapter); 791 } 792 793 /* re-enable interrupts, put back the bank selection register */ 794 spin_lock_irqsave(&adapter->lock, flags); 795 if (KS8842_USE_DMA(adapter)) 796 ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); 797 else 798 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); 799 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); 800 801 /* Make sure timberdale continues DMA operations, they are stopped while 802 we are handling the ks8842 because we might change bank */ 803 if (KS8842_USE_DMA(adapter)) 804 ks8842_resume_dma(adapter); 805 806 spin_unlock_irqrestore(&adapter->lock, flags); 807 } 808 809 static irqreturn_t ks8842_irq(int irq, void *devid) 810 { 811 struct net_device *netdev = devid; 812 struct ks8842_adapter *adapter = netdev_priv(netdev); 813 u16 isr; 814 u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); 815 irqreturn_t ret = IRQ_NONE; 816 817 isr = ks8842_read16(adapter, 18, REG_ISR); 818 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); 819 820 if (isr) { 821 if (KS8842_USE_DMA(adapter)) 822 /* disable all but RX IRQ, since the FPGA relies on it*/ 823 ks8842_write16(adapter, 18, IRQ_RX, REG_IER); 824 else 825 /* disable IRQ */ 826 ks8842_write16(adapter, 18, 0x00, REG_IER); 827 828 /* schedule tasklet */ 829 tasklet_schedule(&adapter->tasklet); 830 831 ret = IRQ_HANDLED; 832 } 833 834 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); 835 836 /* After an interrupt, tell timberdale to continue DMA operations. 837 DMA is disabled while we are handling the ks8842 because we might 838 change bank */ 839 ks8842_resume_dma(adapter); 840 841 return ret; 842 } 843 844 static void ks8842_dma_rx_cb(void *data) 845 { 846 struct net_device *netdev = data; 847 struct ks8842_adapter *adapter = netdev_priv(netdev); 848 849 netdev_dbg(netdev, "RX DMA finished\n"); 850 /* schedule tasklet */ 851 if (adapter->dma_rx.adesc) 852 tasklet_schedule(&adapter->dma_rx.tasklet); 853 } 854 855 static void ks8842_dma_tx_cb(void *data) 856 { 857 struct net_device *netdev = data; 858 struct ks8842_adapter *adapter = netdev_priv(netdev); 859 struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; 860 861 netdev_dbg(netdev, "TX DMA finished\n"); 862 863 if (!ctl->adesc) 864 return; 865 866 netdev->stats.tx_packets++; 867 ctl->adesc = NULL; 868 869 if (netif_queue_stopped(netdev)) 870 netif_wake_queue(netdev); 871 } 872 873 static void ks8842_stop_dma(struct ks8842_adapter *adapter) 874 { 875 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; 876 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; 877 878 tx_ctl->adesc = NULL; 879 if (tx_ctl->chan) 880 tx_ctl->chan->device->device_control(tx_ctl->chan, 881 DMA_TERMINATE_ALL, 0); 882 883 rx_ctl->adesc = NULL; 884 if (rx_ctl->chan) 885 rx_ctl->chan->device->device_control(rx_ctl->chan, 886 DMA_TERMINATE_ALL, 0); 887 888 if (sg_dma_address(&rx_ctl->sg)) 889 dma_unmap_single(adapter->dev, sg_dma_address(&rx_ctl->sg), 890 DMA_BUFFER_SIZE, DMA_FROM_DEVICE); 891 sg_dma_address(&rx_ctl->sg) = 0; 892 893 dev_kfree_skb(rx_ctl->skb); 894 rx_ctl->skb = NULL; 895 } 896 897 static void ks8842_dealloc_dma_bufs(struct ks8842_adapter *adapter) 898 { 899 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; 900 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; 901 902 ks8842_stop_dma(adapter); 903 904 if (tx_ctl->chan) 905 dma_release_channel(tx_ctl->chan); 906 tx_ctl->chan = NULL; 907 908 if (rx_ctl->chan) 909 dma_release_channel(rx_ctl->chan); 910 rx_ctl->chan = NULL; 911 912 tasklet_kill(&rx_ctl->tasklet); 913 914 if (sg_dma_address(&tx_ctl->sg)) 915 dma_unmap_single(adapter->dev, sg_dma_address(&tx_ctl->sg), 916 DMA_BUFFER_SIZE, DMA_TO_DEVICE); 917 sg_dma_address(&tx_ctl->sg) = 0; 918 919 kfree(tx_ctl->buf); 920 tx_ctl->buf = NULL; 921 } 922 923 static bool ks8842_dma_filter_fn(struct dma_chan *chan, void *filter_param) 924 { 925 return chan->chan_id == (long)filter_param; 926 } 927 928 static int ks8842_alloc_dma_bufs(struct net_device *netdev) 929 { 930 struct ks8842_adapter *adapter = netdev_priv(netdev); 931 struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; 932 struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; 933 int err; 934 935 dma_cap_mask_t mask; 936 937 dma_cap_zero(mask); 938 dma_cap_set(DMA_SLAVE, mask); 939 dma_cap_set(DMA_PRIVATE, mask); 940 941 sg_init_table(&tx_ctl->sg, 1); 942 943 tx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, 944 (void *)(long)tx_ctl->channel); 945 if (!tx_ctl->chan) { 946 err = -ENODEV; 947 goto err; 948 } 949 950 /* allocate DMA buffer */ 951 tx_ctl->buf = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL); 952 if (!tx_ctl->buf) { 953 err = -ENOMEM; 954 goto err; 955 } 956 957 sg_dma_address(&tx_ctl->sg) = dma_map_single(adapter->dev, 958 tx_ctl->buf, DMA_BUFFER_SIZE, DMA_TO_DEVICE); 959 err = dma_mapping_error(adapter->dev, 960 sg_dma_address(&tx_ctl->sg)); 961 if (err) { 962 sg_dma_address(&tx_ctl->sg) = 0; 963 goto err; 964 } 965 966 rx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, 967 (void *)(long)rx_ctl->channel); 968 if (!rx_ctl->chan) { 969 err = -ENODEV; 970 goto err; 971 } 972 973 tasklet_init(&rx_ctl->tasklet, ks8842_rx_frame_dma_tasklet, 974 (unsigned long)netdev); 975 976 return 0; 977 err: 978 ks8842_dealloc_dma_bufs(adapter); 979 return err; 980 } 981 982 /* Netdevice operations */ 983 984 static int ks8842_open(struct net_device *netdev) 985 { 986 struct ks8842_adapter *adapter = netdev_priv(netdev); 987 int err; 988 989 netdev_dbg(netdev, "%s - entry\n", __func__); 990 991 if (KS8842_USE_DMA(adapter)) { 992 err = ks8842_alloc_dma_bufs(netdev); 993 994 if (!err) { 995 /* start RX dma */ 996 err = __ks8842_start_new_rx_dma(netdev); 997 if (err) 998 ks8842_dealloc_dma_bufs(adapter); 999 } 1000 1001 if (err) { 1002 printk(KERN_WARNING DRV_NAME 1003 ": Failed to initiate DMA, running PIO\n"); 1004 ks8842_dealloc_dma_bufs(adapter); 1005 adapter->dma_rx.channel = -1; 1006 adapter->dma_tx.channel = -1; 1007 } 1008 } 1009 1010 /* reset the HW */ 1011 ks8842_reset_hw(adapter); 1012 1013 ks8842_write_mac_addr(adapter, netdev->dev_addr); 1014 1015 ks8842_update_link_status(netdev, adapter); 1016 1017 err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME, 1018 netdev); 1019 if (err) { 1020 pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err); 1021 return err; 1022 } 1023 1024 return 0; 1025 } 1026 1027 static int ks8842_close(struct net_device *netdev) 1028 { 1029 struct ks8842_adapter *adapter = netdev_priv(netdev); 1030 1031 netdev_dbg(netdev, "%s - entry\n", __func__); 1032 1033 cancel_work_sync(&adapter->timeout_work); 1034 1035 if (KS8842_USE_DMA(adapter)) 1036 ks8842_dealloc_dma_bufs(adapter); 1037 1038 /* free the irq */ 1039 free_irq(adapter->irq, netdev); 1040 1041 /* disable the switch */ 1042 ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE); 1043 1044 return 0; 1045 } 1046 1047 static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb, 1048 struct net_device *netdev) 1049 { 1050 int ret; 1051 struct ks8842_adapter *adapter = netdev_priv(netdev); 1052 1053 netdev_dbg(netdev, "%s: entry\n", __func__); 1054 1055 if (KS8842_USE_DMA(adapter)) { 1056 unsigned long flags; 1057 ret = ks8842_tx_frame_dma(skb, netdev); 1058 /* for now only allow one transfer at the time */ 1059 spin_lock_irqsave(&adapter->lock, flags); 1060 if (adapter->dma_tx.adesc) 1061 netif_stop_queue(netdev); 1062 spin_unlock_irqrestore(&adapter->lock, flags); 1063 return ret; 1064 } 1065 1066 ret = ks8842_tx_frame(skb, netdev); 1067 1068 if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8) 1069 netif_stop_queue(netdev); 1070 1071 return ret; 1072 } 1073 1074 static int ks8842_set_mac(struct net_device *netdev, void *p) 1075 { 1076 struct ks8842_adapter *adapter = netdev_priv(netdev); 1077 struct sockaddr *addr = p; 1078 char *mac = (u8 *)addr->sa_data; 1079 1080 netdev_dbg(netdev, "%s: entry\n", __func__); 1081 1082 if (!is_valid_ether_addr(addr->sa_data)) 1083 return -EADDRNOTAVAIL; 1084 1085 memcpy(netdev->dev_addr, mac, netdev->addr_len); 1086 1087 ks8842_write_mac_addr(adapter, mac); 1088 return 0; 1089 } 1090 1091 static void ks8842_tx_timeout_work(struct work_struct *work) 1092 { 1093 struct ks8842_adapter *adapter = 1094 container_of(work, struct ks8842_adapter, timeout_work); 1095 struct net_device *netdev = adapter->netdev; 1096 unsigned long flags; 1097 1098 netdev_dbg(netdev, "%s: entry\n", __func__); 1099 1100 spin_lock_irqsave(&adapter->lock, flags); 1101 1102 if (KS8842_USE_DMA(adapter)) 1103 ks8842_stop_dma(adapter); 1104 1105 /* disable interrupts */ 1106 ks8842_write16(adapter, 18, 0, REG_IER); 1107 ks8842_write16(adapter, 18, 0xFFFF, REG_ISR); 1108 1109 netif_stop_queue(netdev); 1110 1111 spin_unlock_irqrestore(&adapter->lock, flags); 1112 1113 ks8842_reset_hw(adapter); 1114 1115 ks8842_write_mac_addr(adapter, netdev->dev_addr); 1116 1117 ks8842_update_link_status(netdev, adapter); 1118 1119 if (KS8842_USE_DMA(adapter)) 1120 __ks8842_start_new_rx_dma(netdev); 1121 } 1122 1123 static void ks8842_tx_timeout(struct net_device *netdev) 1124 { 1125 struct ks8842_adapter *adapter = netdev_priv(netdev); 1126 1127 netdev_dbg(netdev, "%s: entry\n", __func__); 1128 1129 schedule_work(&adapter->timeout_work); 1130 } 1131 1132 static const struct net_device_ops ks8842_netdev_ops = { 1133 .ndo_open = ks8842_open, 1134 .ndo_stop = ks8842_close, 1135 .ndo_start_xmit = ks8842_xmit_frame, 1136 .ndo_set_mac_address = ks8842_set_mac, 1137 .ndo_tx_timeout = ks8842_tx_timeout, 1138 .ndo_validate_addr = eth_validate_addr 1139 }; 1140 1141 static const struct ethtool_ops ks8842_ethtool_ops = { 1142 .get_link = ethtool_op_get_link, 1143 }; 1144 1145 static int ks8842_probe(struct platform_device *pdev) 1146 { 1147 int err = -ENOMEM; 1148 struct resource *iomem; 1149 struct net_device *netdev; 1150 struct ks8842_adapter *adapter; 1151 struct ks8842_platform_data *pdata = pdev->dev.platform_data; 1152 u16 id; 1153 unsigned i; 1154 1155 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1156 if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) 1157 goto err_mem_region; 1158 1159 netdev = alloc_etherdev(sizeof(struct ks8842_adapter)); 1160 if (!netdev) 1161 goto err_alloc_etherdev; 1162 1163 SET_NETDEV_DEV(netdev, &pdev->dev); 1164 1165 adapter = netdev_priv(netdev); 1166 adapter->netdev = netdev; 1167 INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work); 1168 adapter->hw_addr = ioremap(iomem->start, resource_size(iomem)); 1169 adapter->conf_flags = iomem->flags; 1170 1171 if (!adapter->hw_addr) 1172 goto err_ioremap; 1173 1174 adapter->irq = platform_get_irq(pdev, 0); 1175 if (adapter->irq < 0) { 1176 err = adapter->irq; 1177 goto err_get_irq; 1178 } 1179 1180 adapter->dev = (pdev->dev.parent) ? pdev->dev.parent : &pdev->dev; 1181 1182 /* DMA is only supported when accessed via timberdale */ 1183 if (!(adapter->conf_flags & MICREL_KS884X) && pdata && 1184 (pdata->tx_dma_channel != -1) && 1185 (pdata->rx_dma_channel != -1)) { 1186 adapter->dma_rx.channel = pdata->rx_dma_channel; 1187 adapter->dma_tx.channel = pdata->tx_dma_channel; 1188 } else { 1189 adapter->dma_rx.channel = -1; 1190 adapter->dma_tx.channel = -1; 1191 } 1192 1193 tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev); 1194 spin_lock_init(&adapter->lock); 1195 1196 netdev->netdev_ops = &ks8842_netdev_ops; 1197 netdev->ethtool_ops = &ks8842_ethtool_ops; 1198 1199 /* Check if a mac address was given */ 1200 i = netdev->addr_len; 1201 if (pdata) { 1202 for (i = 0; i < netdev->addr_len; i++) 1203 if (pdata->macaddr[i] != 0) 1204 break; 1205 1206 if (i < netdev->addr_len) 1207 /* an address was passed, use it */ 1208 memcpy(netdev->dev_addr, pdata->macaddr, 1209 netdev->addr_len); 1210 } 1211 1212 if (i == netdev->addr_len) { 1213 ks8842_read_mac_addr(adapter, netdev->dev_addr); 1214 1215 if (!is_valid_ether_addr(netdev->dev_addr)) 1216 eth_hw_addr_random(netdev); 1217 } 1218 1219 id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE); 1220 1221 strcpy(netdev->name, "eth%d"); 1222 err = register_netdev(netdev); 1223 if (err) 1224 goto err_register; 1225 1226 platform_set_drvdata(pdev, netdev); 1227 1228 pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n", 1229 (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); 1230 1231 return 0; 1232 1233 err_register: 1234 err_get_irq: 1235 iounmap(adapter->hw_addr); 1236 err_ioremap: 1237 free_netdev(netdev); 1238 err_alloc_etherdev: 1239 release_mem_region(iomem->start, resource_size(iomem)); 1240 err_mem_region: 1241 return err; 1242 } 1243 1244 static int ks8842_remove(struct platform_device *pdev) 1245 { 1246 struct net_device *netdev = platform_get_drvdata(pdev); 1247 struct ks8842_adapter *adapter = netdev_priv(netdev); 1248 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1249 1250 unregister_netdev(netdev); 1251 tasklet_kill(&adapter->tasklet); 1252 iounmap(adapter->hw_addr); 1253 free_netdev(netdev); 1254 release_mem_region(iomem->start, resource_size(iomem)); 1255 return 0; 1256 } 1257 1258 1259 static struct platform_driver ks8842_platform_driver = { 1260 .driver = { 1261 .name = DRV_NAME, 1262 .owner = THIS_MODULE, 1263 }, 1264 .probe = ks8842_probe, 1265 .remove = ks8842_remove, 1266 }; 1267 1268 module_platform_driver(ks8842_platform_driver); 1269 1270 MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver"); 1271 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 1272 MODULE_LICENSE("GPL v2"); 1273 MODULE_ALIAS("platform:ks8842"); 1274 1275