1 /* 2 * RDC R6040 Fast Ethernet MAC support 3 * 4 * Copyright (C) 2004 Sten Wang <sten.wang@rdc.com.tw> 5 * Copyright (C) 2007 6 * Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us> 7 * Copyright (C) 2007-2012 Florian Fainelli <florian@openwrt.org> 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 2 12 * of the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the 21 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22 * Boston, MA 02110-1301, USA. 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/moduleparam.h> 28 #include <linux/string.h> 29 #include <linux/timer.h> 30 #include <linux/errno.h> 31 #include <linux/ioport.h> 32 #include <linux/interrupt.h> 33 #include <linux/pci.h> 34 #include <linux/netdevice.h> 35 #include <linux/etherdevice.h> 36 #include <linux/skbuff.h> 37 #include <linux/delay.h> 38 #include <linux/mii.h> 39 #include <linux/ethtool.h> 40 #include <linux/crc32.h> 41 #include <linux/spinlock.h> 42 #include <linux/bitops.h> 43 #include <linux/io.h> 44 #include <linux/irq.h> 45 #include <linux/uaccess.h> 46 #include <linux/phy.h> 47 48 #include <asm/processor.h> 49 50 #define DRV_NAME "r6040" 51 #define DRV_VERSION "0.28" 52 #define DRV_RELDATE "07Oct2011" 53 54 /* Time in jiffies before concluding the transmitter is hung. */ 55 #define TX_TIMEOUT (6000 * HZ / 1000) 56 57 /* RDC MAC I/O Size */ 58 #define R6040_IO_SIZE 256 59 60 /* MAX RDC MAC */ 61 #define MAX_MAC 2 62 63 /* MAC registers */ 64 #define MCR0 0x00 /* Control register 0 */ 65 #define MCR0_RCVEN 0x0002 /* Receive enable */ 66 #define MCR0_PROMISC 0x0020 /* Promiscuous mode */ 67 #define MCR0_HASH_EN 0x0100 /* Enable multicast hash table function */ 68 #define MCR0_XMTEN 0x1000 /* Transmission enable */ 69 #define MCR0_FD 0x8000 /* Full/Half duplex */ 70 #define MCR1 0x04 /* Control register 1 */ 71 #define MAC_RST 0x0001 /* Reset the MAC */ 72 #define MBCR 0x08 /* Bus control */ 73 #define MT_ICR 0x0C /* TX interrupt control */ 74 #define MR_ICR 0x10 /* RX interrupt control */ 75 #define MTPR 0x14 /* TX poll command register */ 76 #define TM2TX 0x0001 /* Trigger MAC to transmit */ 77 #define MR_BSR 0x18 /* RX buffer size */ 78 #define MR_DCR 0x1A /* RX descriptor control */ 79 #define MLSR 0x1C /* Last status */ 80 #define TX_FIFO_UNDR 0x0200 /* TX FIFO under-run */ 81 #define TX_EXCEEDC 0x2000 /* Transmit exceed collision */ 82 #define TX_LATEC 0x4000 /* Transmit late collision */ 83 #define MMDIO 0x20 /* MDIO control register */ 84 #define MDIO_WRITE 0x4000 /* MDIO write */ 85 #define MDIO_READ 0x2000 /* MDIO read */ 86 #define MMRD 0x24 /* MDIO read data register */ 87 #define MMWD 0x28 /* MDIO write data register */ 88 #define MTD_SA0 0x2C /* TX descriptor start address 0 */ 89 #define MTD_SA1 0x30 /* TX descriptor start address 1 */ 90 #define MRD_SA0 0x34 /* RX descriptor start address 0 */ 91 #define MRD_SA1 0x38 /* RX descriptor start address 1 */ 92 #define MISR 0x3C /* Status register */ 93 #define MIER 0x40 /* INT enable register */ 94 #define MSK_INT 0x0000 /* Mask off interrupts */ 95 #define RX_FINISH 0x0001 /* RX finished */ 96 #define RX_NO_DESC 0x0002 /* No RX descriptor available */ 97 #define RX_FIFO_FULL 0x0004 /* RX FIFO full */ 98 #define RX_EARLY 0x0008 /* RX early */ 99 #define TX_FINISH 0x0010 /* TX finished */ 100 #define TX_EARLY 0x0080 /* TX early */ 101 #define EVENT_OVRFL 0x0100 /* Event counter overflow */ 102 #define LINK_CHANGED 0x0200 /* PHY link changed */ 103 #define ME_CISR 0x44 /* Event counter INT status */ 104 #define ME_CIER 0x48 /* Event counter INT enable */ 105 #define MR_CNT 0x50 /* Successfully received packet counter */ 106 #define ME_CNT0 0x52 /* Event counter 0 */ 107 #define ME_CNT1 0x54 /* Event counter 1 */ 108 #define ME_CNT2 0x56 /* Event counter 2 */ 109 #define ME_CNT3 0x58 /* Event counter 3 */ 110 #define MT_CNT 0x5A /* Successfully transmit packet counter */ 111 #define ME_CNT4 0x5C /* Event counter 4 */ 112 #define MP_CNT 0x5E /* Pause frame counter register */ 113 #define MAR0 0x60 /* Hash table 0 */ 114 #define MAR1 0x62 /* Hash table 1 */ 115 #define MAR2 0x64 /* Hash table 2 */ 116 #define MAR3 0x66 /* Hash table 3 */ 117 #define MID_0L 0x68 /* Multicast address MID0 Low */ 118 #define MID_0M 0x6A /* Multicast address MID0 Medium */ 119 #define MID_0H 0x6C /* Multicast address MID0 High */ 120 #define MID_1L 0x70 /* MID1 Low */ 121 #define MID_1M 0x72 /* MID1 Medium */ 122 #define MID_1H 0x74 /* MID1 High */ 123 #define MID_2L 0x78 /* MID2 Low */ 124 #define MID_2M 0x7A /* MID2 Medium */ 125 #define MID_2H 0x7C /* MID2 High */ 126 #define MID_3L 0x80 /* MID3 Low */ 127 #define MID_3M 0x82 /* MID3 Medium */ 128 #define MID_3H 0x84 /* MID3 High */ 129 #define PHY_CC 0x88 /* PHY status change configuration register */ 130 #define SCEN 0x8000 /* PHY status change enable */ 131 #define PHYAD_SHIFT 8 /* PHY address shift */ 132 #define TMRDIV_SHIFT 0 /* Timer divider shift */ 133 #define PHY_ST 0x8A /* PHY status register */ 134 #define MAC_SM 0xAC /* MAC status machine */ 135 #define MAC_SM_RST 0x0002 /* MAC status machine reset */ 136 #define MAC_ID 0xBE /* Identifier register */ 137 138 #define TX_DCNT 0x80 /* TX descriptor count */ 139 #define RX_DCNT 0x80 /* RX descriptor count */ 140 #define MAX_BUF_SIZE 0x600 141 #define RX_DESC_SIZE (RX_DCNT * sizeof(struct r6040_descriptor)) 142 #define TX_DESC_SIZE (TX_DCNT * sizeof(struct r6040_descriptor)) 143 #define MBCR_DEFAULT 0x012A /* MAC Bus Control Register */ 144 #define MCAST_MAX 3 /* Max number multicast addresses to filter */ 145 146 #define MAC_DEF_TIMEOUT 2048 /* Default MAC read/write operation timeout */ 147 148 /* Descriptor status */ 149 #define DSC_OWNER_MAC 0x8000 /* MAC is the owner of this descriptor */ 150 #define DSC_RX_OK 0x4000 /* RX was successful */ 151 #define DSC_RX_ERR 0x0800 /* RX PHY error */ 152 #define DSC_RX_ERR_DRI 0x0400 /* RX dribble packet */ 153 #define DSC_RX_ERR_BUF 0x0200 /* RX length exceeds buffer size */ 154 #define DSC_RX_ERR_LONG 0x0100 /* RX length > maximum packet length */ 155 #define DSC_RX_ERR_RUNT 0x0080 /* RX packet length < 64 byte */ 156 #define DSC_RX_ERR_CRC 0x0040 /* RX CRC error */ 157 #define DSC_RX_BCAST 0x0020 /* RX broadcast (no error) */ 158 #define DSC_RX_MCAST 0x0010 /* RX multicast (no error) */ 159 #define DSC_RX_MCH_HIT 0x0008 /* RX multicast hit in hash table (no error) */ 160 #define DSC_RX_MIDH_HIT 0x0004 /* RX MID table hit (no error) */ 161 #define DSC_RX_IDX_MID_MASK 3 /* RX mask for the index of matched MIDx */ 162 163 MODULE_AUTHOR("Sten Wang <sten.wang@rdc.com.tw>," 164 "Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>," 165 "Florian Fainelli <florian@openwrt.org>"); 166 MODULE_LICENSE("GPL"); 167 MODULE_DESCRIPTION("RDC R6040 NAPI PCI FastEthernet driver"); 168 MODULE_VERSION(DRV_VERSION " " DRV_RELDATE); 169 170 /* RX and TX interrupts that we handle */ 171 #define RX_INTS (RX_FIFO_FULL | RX_NO_DESC | RX_FINISH) 172 #define TX_INTS (TX_FINISH) 173 #define INT_MASK (RX_INTS | TX_INTS) 174 175 struct r6040_descriptor { 176 u16 status, len; /* 0-3 */ 177 __le32 buf; /* 4-7 */ 178 __le32 ndesc; /* 8-B */ 179 u32 rev1; /* C-F */ 180 char *vbufp; /* 10-13 */ 181 struct r6040_descriptor *vndescp; /* 14-17 */ 182 struct sk_buff *skb_ptr; /* 18-1B */ 183 u32 rev2; /* 1C-1F */ 184 } __aligned(32); 185 186 struct r6040_private { 187 spinlock_t lock; /* driver lock */ 188 struct pci_dev *pdev; 189 struct r6040_descriptor *rx_insert_ptr; 190 struct r6040_descriptor *rx_remove_ptr; 191 struct r6040_descriptor *tx_insert_ptr; 192 struct r6040_descriptor *tx_remove_ptr; 193 struct r6040_descriptor *rx_ring; 194 struct r6040_descriptor *tx_ring; 195 dma_addr_t rx_ring_dma; 196 dma_addr_t tx_ring_dma; 197 u16 tx_free_desc; 198 u16 mcr0; 199 struct net_device *dev; 200 struct mii_bus *mii_bus; 201 struct napi_struct napi; 202 void __iomem *base; 203 struct phy_device *phydev; 204 int old_link; 205 int old_duplex; 206 }; 207 208 static char version[] = DRV_NAME 209 ": RDC R6040 NAPI net driver," 210 "version "DRV_VERSION " (" DRV_RELDATE ")"; 211 212 /* Read a word data from PHY Chip */ 213 static int r6040_phy_read(void __iomem *ioaddr, int phy_addr, int reg) 214 { 215 int limit = MAC_DEF_TIMEOUT; 216 u16 cmd; 217 218 iowrite16(MDIO_READ + reg + (phy_addr << 8), ioaddr + MMDIO); 219 /* Wait for the read bit to be cleared */ 220 while (limit--) { 221 cmd = ioread16(ioaddr + MMDIO); 222 if (!(cmd & MDIO_READ)) 223 break; 224 udelay(1); 225 } 226 227 if (limit < 0) 228 return -ETIMEDOUT; 229 230 return ioread16(ioaddr + MMRD); 231 } 232 233 /* Write a word data from PHY Chip */ 234 static int r6040_phy_write(void __iomem *ioaddr, 235 int phy_addr, int reg, u16 val) 236 { 237 int limit = MAC_DEF_TIMEOUT; 238 u16 cmd; 239 240 iowrite16(val, ioaddr + MMWD); 241 /* Write the command to the MDIO bus */ 242 iowrite16(MDIO_WRITE + reg + (phy_addr << 8), ioaddr + MMDIO); 243 /* Wait for the write bit to be cleared */ 244 while (limit--) { 245 cmd = ioread16(ioaddr + MMDIO); 246 if (!(cmd & MDIO_WRITE)) 247 break; 248 udelay(1); 249 } 250 251 return (limit < 0) ? -ETIMEDOUT : 0; 252 } 253 254 static int r6040_mdiobus_read(struct mii_bus *bus, int phy_addr, int reg) 255 { 256 struct net_device *dev = bus->priv; 257 struct r6040_private *lp = netdev_priv(dev); 258 void __iomem *ioaddr = lp->base; 259 260 return r6040_phy_read(ioaddr, phy_addr, reg); 261 } 262 263 static int r6040_mdiobus_write(struct mii_bus *bus, int phy_addr, 264 int reg, u16 value) 265 { 266 struct net_device *dev = bus->priv; 267 struct r6040_private *lp = netdev_priv(dev); 268 void __iomem *ioaddr = lp->base; 269 270 return r6040_phy_write(ioaddr, phy_addr, reg, value); 271 } 272 273 static void r6040_free_txbufs(struct net_device *dev) 274 { 275 struct r6040_private *lp = netdev_priv(dev); 276 int i; 277 278 for (i = 0; i < TX_DCNT; i++) { 279 if (lp->tx_insert_ptr->skb_ptr) { 280 pci_unmap_single(lp->pdev, 281 le32_to_cpu(lp->tx_insert_ptr->buf), 282 MAX_BUF_SIZE, PCI_DMA_TODEVICE); 283 dev_kfree_skb(lp->tx_insert_ptr->skb_ptr); 284 lp->tx_insert_ptr->skb_ptr = NULL; 285 } 286 lp->tx_insert_ptr = lp->tx_insert_ptr->vndescp; 287 } 288 } 289 290 static void r6040_free_rxbufs(struct net_device *dev) 291 { 292 struct r6040_private *lp = netdev_priv(dev); 293 int i; 294 295 for (i = 0; i < RX_DCNT; i++) { 296 if (lp->rx_insert_ptr->skb_ptr) { 297 pci_unmap_single(lp->pdev, 298 le32_to_cpu(lp->rx_insert_ptr->buf), 299 MAX_BUF_SIZE, PCI_DMA_FROMDEVICE); 300 dev_kfree_skb(lp->rx_insert_ptr->skb_ptr); 301 lp->rx_insert_ptr->skb_ptr = NULL; 302 } 303 lp->rx_insert_ptr = lp->rx_insert_ptr->vndescp; 304 } 305 } 306 307 static void r6040_init_ring_desc(struct r6040_descriptor *desc_ring, 308 dma_addr_t desc_dma, int size) 309 { 310 struct r6040_descriptor *desc = desc_ring; 311 dma_addr_t mapping = desc_dma; 312 313 while (size-- > 0) { 314 mapping += sizeof(*desc); 315 desc->ndesc = cpu_to_le32(mapping); 316 desc->vndescp = desc + 1; 317 desc++; 318 } 319 desc--; 320 desc->ndesc = cpu_to_le32(desc_dma); 321 desc->vndescp = desc_ring; 322 } 323 324 static void r6040_init_txbufs(struct net_device *dev) 325 { 326 struct r6040_private *lp = netdev_priv(dev); 327 328 lp->tx_free_desc = TX_DCNT; 329 330 lp->tx_remove_ptr = lp->tx_insert_ptr = lp->tx_ring; 331 r6040_init_ring_desc(lp->tx_ring, lp->tx_ring_dma, TX_DCNT); 332 } 333 334 static int r6040_alloc_rxbufs(struct net_device *dev) 335 { 336 struct r6040_private *lp = netdev_priv(dev); 337 struct r6040_descriptor *desc; 338 struct sk_buff *skb; 339 int rc; 340 341 lp->rx_remove_ptr = lp->rx_insert_ptr = lp->rx_ring; 342 r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT); 343 344 /* Allocate skbs for the rx descriptors */ 345 desc = lp->rx_ring; 346 do { 347 skb = netdev_alloc_skb(dev, MAX_BUF_SIZE); 348 if (!skb) { 349 rc = -ENOMEM; 350 goto err_exit; 351 } 352 desc->skb_ptr = skb; 353 desc->buf = cpu_to_le32(pci_map_single(lp->pdev, 354 desc->skb_ptr->data, 355 MAX_BUF_SIZE, PCI_DMA_FROMDEVICE)); 356 desc->status = DSC_OWNER_MAC; 357 desc = desc->vndescp; 358 } while (desc != lp->rx_ring); 359 360 return 0; 361 362 err_exit: 363 /* Deallocate all previously allocated skbs */ 364 r6040_free_rxbufs(dev); 365 return rc; 366 } 367 368 static void r6040_reset_mac(struct r6040_private *lp) 369 { 370 void __iomem *ioaddr = lp->base; 371 int limit = MAC_DEF_TIMEOUT; 372 u16 cmd; 373 374 iowrite16(MAC_RST, ioaddr + MCR1); 375 while (limit--) { 376 cmd = ioread16(ioaddr + MCR1); 377 if (cmd & MAC_RST) 378 break; 379 } 380 381 /* Reset internal state machine */ 382 iowrite16(MAC_SM_RST, ioaddr + MAC_SM); 383 iowrite16(0, ioaddr + MAC_SM); 384 mdelay(5); 385 } 386 387 static void r6040_init_mac_regs(struct net_device *dev) 388 { 389 struct r6040_private *lp = netdev_priv(dev); 390 void __iomem *ioaddr = lp->base; 391 392 /* Mask Off Interrupt */ 393 iowrite16(MSK_INT, ioaddr + MIER); 394 395 /* Reset RDC MAC */ 396 r6040_reset_mac(lp); 397 398 /* MAC Bus Control Register */ 399 iowrite16(MBCR_DEFAULT, ioaddr + MBCR); 400 401 /* Buffer Size Register */ 402 iowrite16(MAX_BUF_SIZE, ioaddr + MR_BSR); 403 404 /* Write TX ring start address */ 405 iowrite16(lp->tx_ring_dma, ioaddr + MTD_SA0); 406 iowrite16(lp->tx_ring_dma >> 16, ioaddr + MTD_SA1); 407 408 /* Write RX ring start address */ 409 iowrite16(lp->rx_ring_dma, ioaddr + MRD_SA0); 410 iowrite16(lp->rx_ring_dma >> 16, ioaddr + MRD_SA1); 411 412 /* Set interrupt waiting time and packet numbers */ 413 iowrite16(0, ioaddr + MT_ICR); 414 iowrite16(0, ioaddr + MR_ICR); 415 416 /* Enable interrupts */ 417 iowrite16(INT_MASK, ioaddr + MIER); 418 419 /* Enable TX and RX */ 420 iowrite16(lp->mcr0 | MCR0_RCVEN, ioaddr); 421 422 /* Let TX poll the descriptors 423 * we may got called by r6040_tx_timeout which has left 424 * some unsent tx buffers */ 425 iowrite16(TM2TX, ioaddr + MTPR); 426 } 427 428 static void r6040_tx_timeout(struct net_device *dev) 429 { 430 struct r6040_private *priv = netdev_priv(dev); 431 void __iomem *ioaddr = priv->base; 432 433 netdev_warn(dev, "transmit timed out, int enable %4.4x " 434 "status %4.4x\n", 435 ioread16(ioaddr + MIER), 436 ioread16(ioaddr + MISR)); 437 438 dev->stats.tx_errors++; 439 440 /* Reset MAC and re-init all registers */ 441 r6040_init_mac_regs(dev); 442 } 443 444 static struct net_device_stats *r6040_get_stats(struct net_device *dev) 445 { 446 struct r6040_private *priv = netdev_priv(dev); 447 void __iomem *ioaddr = priv->base; 448 unsigned long flags; 449 450 spin_lock_irqsave(&priv->lock, flags); 451 dev->stats.rx_crc_errors += ioread8(ioaddr + ME_CNT1); 452 dev->stats.multicast += ioread8(ioaddr + ME_CNT0); 453 spin_unlock_irqrestore(&priv->lock, flags); 454 455 return &dev->stats; 456 } 457 458 /* Stop RDC MAC and Free the allocated resource */ 459 static void r6040_down(struct net_device *dev) 460 { 461 struct r6040_private *lp = netdev_priv(dev); 462 void __iomem *ioaddr = lp->base; 463 u16 *adrp; 464 465 /* Stop MAC */ 466 iowrite16(MSK_INT, ioaddr + MIER); /* Mask Off Interrupt */ 467 468 /* Reset RDC MAC */ 469 r6040_reset_mac(lp); 470 471 /* Restore MAC Address to MIDx */ 472 adrp = (u16 *) dev->dev_addr; 473 iowrite16(adrp[0], ioaddr + MID_0L); 474 iowrite16(adrp[1], ioaddr + MID_0M); 475 iowrite16(adrp[2], ioaddr + MID_0H); 476 477 phy_stop(lp->phydev); 478 } 479 480 static int r6040_close(struct net_device *dev) 481 { 482 struct r6040_private *lp = netdev_priv(dev); 483 struct pci_dev *pdev = lp->pdev; 484 485 spin_lock_irq(&lp->lock); 486 napi_disable(&lp->napi); 487 netif_stop_queue(dev); 488 r6040_down(dev); 489 490 free_irq(dev->irq, dev); 491 492 /* Free RX buffer */ 493 r6040_free_rxbufs(dev); 494 495 /* Free TX buffer */ 496 r6040_free_txbufs(dev); 497 498 spin_unlock_irq(&lp->lock); 499 500 /* Free Descriptor memory */ 501 if (lp->rx_ring) { 502 pci_free_consistent(pdev, 503 RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma); 504 lp->rx_ring = NULL; 505 } 506 507 if (lp->tx_ring) { 508 pci_free_consistent(pdev, 509 TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma); 510 lp->tx_ring = NULL; 511 } 512 513 return 0; 514 } 515 516 static int r6040_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 517 { 518 struct r6040_private *lp = netdev_priv(dev); 519 520 if (!lp->phydev) 521 return -EINVAL; 522 523 return phy_mii_ioctl(lp->phydev, rq, cmd); 524 } 525 526 static int r6040_rx(struct net_device *dev, int limit) 527 { 528 struct r6040_private *priv = netdev_priv(dev); 529 struct r6040_descriptor *descptr = priv->rx_remove_ptr; 530 struct sk_buff *skb_ptr, *new_skb; 531 int count = 0; 532 u16 err; 533 534 /* Limit not reached and the descriptor belongs to the CPU */ 535 while (count < limit && !(descptr->status & DSC_OWNER_MAC)) { 536 /* Read the descriptor status */ 537 err = descptr->status; 538 /* Global error status set */ 539 if (err & DSC_RX_ERR) { 540 /* RX dribble */ 541 if (err & DSC_RX_ERR_DRI) 542 dev->stats.rx_frame_errors++; 543 /* Buffer length exceeded */ 544 if (err & DSC_RX_ERR_BUF) 545 dev->stats.rx_length_errors++; 546 /* Packet too long */ 547 if (err & DSC_RX_ERR_LONG) 548 dev->stats.rx_length_errors++; 549 /* Packet < 64 bytes */ 550 if (err & DSC_RX_ERR_RUNT) 551 dev->stats.rx_length_errors++; 552 /* CRC error */ 553 if (err & DSC_RX_ERR_CRC) { 554 spin_lock(&priv->lock); 555 dev->stats.rx_crc_errors++; 556 spin_unlock(&priv->lock); 557 } 558 goto next_descr; 559 } 560 561 /* Packet successfully received */ 562 new_skb = netdev_alloc_skb(dev, MAX_BUF_SIZE); 563 if (!new_skb) { 564 dev->stats.rx_dropped++; 565 goto next_descr; 566 } 567 skb_ptr = descptr->skb_ptr; 568 skb_ptr->dev = priv->dev; 569 570 /* Do not count the CRC */ 571 skb_put(skb_ptr, descptr->len - 4); 572 pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf), 573 MAX_BUF_SIZE, PCI_DMA_FROMDEVICE); 574 skb_ptr->protocol = eth_type_trans(skb_ptr, priv->dev); 575 576 /* Send to upper layer */ 577 netif_receive_skb(skb_ptr); 578 dev->stats.rx_packets++; 579 dev->stats.rx_bytes += descptr->len - 4; 580 581 /* put new skb into descriptor */ 582 descptr->skb_ptr = new_skb; 583 descptr->buf = cpu_to_le32(pci_map_single(priv->pdev, 584 descptr->skb_ptr->data, 585 MAX_BUF_SIZE, PCI_DMA_FROMDEVICE)); 586 587 next_descr: 588 /* put the descriptor back to the MAC */ 589 descptr->status = DSC_OWNER_MAC; 590 descptr = descptr->vndescp; 591 count++; 592 } 593 priv->rx_remove_ptr = descptr; 594 595 return count; 596 } 597 598 static void r6040_tx(struct net_device *dev) 599 { 600 struct r6040_private *priv = netdev_priv(dev); 601 struct r6040_descriptor *descptr; 602 void __iomem *ioaddr = priv->base; 603 struct sk_buff *skb_ptr; 604 u16 err; 605 606 spin_lock(&priv->lock); 607 descptr = priv->tx_remove_ptr; 608 while (priv->tx_free_desc < TX_DCNT) { 609 /* Check for errors */ 610 err = ioread16(ioaddr + MLSR); 611 612 if (err & TX_FIFO_UNDR) 613 dev->stats.tx_fifo_errors++; 614 if (err & (TX_EXCEEDC | TX_LATEC)) 615 dev->stats.tx_carrier_errors++; 616 617 if (descptr->status & DSC_OWNER_MAC) 618 break; /* Not complete */ 619 skb_ptr = descptr->skb_ptr; 620 pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf), 621 skb_ptr->len, PCI_DMA_TODEVICE); 622 /* Free buffer */ 623 dev_kfree_skb_irq(skb_ptr); 624 descptr->skb_ptr = NULL; 625 /* To next descriptor */ 626 descptr = descptr->vndescp; 627 priv->tx_free_desc++; 628 } 629 priv->tx_remove_ptr = descptr; 630 631 if (priv->tx_free_desc) 632 netif_wake_queue(dev); 633 spin_unlock(&priv->lock); 634 } 635 636 static int r6040_poll(struct napi_struct *napi, int budget) 637 { 638 struct r6040_private *priv = 639 container_of(napi, struct r6040_private, napi); 640 struct net_device *dev = priv->dev; 641 void __iomem *ioaddr = priv->base; 642 int work_done; 643 644 work_done = r6040_rx(dev, budget); 645 646 if (work_done < budget) { 647 napi_complete(napi); 648 /* Enable RX interrupt */ 649 iowrite16(ioread16(ioaddr + MIER) | RX_INTS, ioaddr + MIER); 650 } 651 return work_done; 652 } 653 654 /* The RDC interrupt handler. */ 655 static irqreturn_t r6040_interrupt(int irq, void *dev_id) 656 { 657 struct net_device *dev = dev_id; 658 struct r6040_private *lp = netdev_priv(dev); 659 void __iomem *ioaddr = lp->base; 660 u16 misr, status; 661 662 /* Save MIER */ 663 misr = ioread16(ioaddr + MIER); 664 /* Mask off RDC MAC interrupt */ 665 iowrite16(MSK_INT, ioaddr + MIER); 666 /* Read MISR status and clear */ 667 status = ioread16(ioaddr + MISR); 668 669 if (status == 0x0000 || status == 0xffff) { 670 /* Restore RDC MAC interrupt */ 671 iowrite16(misr, ioaddr + MIER); 672 return IRQ_NONE; 673 } 674 675 /* RX interrupt request */ 676 if (status & RX_INTS) { 677 if (status & RX_NO_DESC) { 678 /* RX descriptor unavailable */ 679 dev->stats.rx_dropped++; 680 dev->stats.rx_missed_errors++; 681 } 682 if (status & RX_FIFO_FULL) 683 dev->stats.rx_fifo_errors++; 684 685 if (likely(napi_schedule_prep(&lp->napi))) { 686 /* Mask off RX interrupt */ 687 misr &= ~RX_INTS; 688 __napi_schedule(&lp->napi); 689 } 690 } 691 692 /* TX interrupt request */ 693 if (status & TX_INTS) 694 r6040_tx(dev); 695 696 /* Restore RDC MAC interrupt */ 697 iowrite16(misr, ioaddr + MIER); 698 699 return IRQ_HANDLED; 700 } 701 702 #ifdef CONFIG_NET_POLL_CONTROLLER 703 static void r6040_poll_controller(struct net_device *dev) 704 { 705 disable_irq(dev->irq); 706 r6040_interrupt(dev->irq, dev); 707 enable_irq(dev->irq); 708 } 709 #endif 710 711 /* Init RDC MAC */ 712 static int r6040_up(struct net_device *dev) 713 { 714 struct r6040_private *lp = netdev_priv(dev); 715 void __iomem *ioaddr = lp->base; 716 int ret; 717 718 /* Initialise and alloc RX/TX buffers */ 719 r6040_init_txbufs(dev); 720 ret = r6040_alloc_rxbufs(dev); 721 if (ret) 722 return ret; 723 724 /* improve performance (by RDC guys) */ 725 r6040_phy_write(ioaddr, 30, 17, 726 (r6040_phy_read(ioaddr, 30, 17) | 0x4000)); 727 r6040_phy_write(ioaddr, 30, 17, 728 ~((~r6040_phy_read(ioaddr, 30, 17)) | 0x2000)); 729 r6040_phy_write(ioaddr, 0, 19, 0x0000); 730 r6040_phy_write(ioaddr, 0, 30, 0x01F0); 731 732 /* Initialize all MAC registers */ 733 r6040_init_mac_regs(dev); 734 735 phy_start(lp->phydev); 736 737 return 0; 738 } 739 740 741 /* Read/set MAC address routines */ 742 static void r6040_mac_address(struct net_device *dev) 743 { 744 struct r6040_private *lp = netdev_priv(dev); 745 void __iomem *ioaddr = lp->base; 746 u16 *adrp; 747 748 /* Reset MAC */ 749 r6040_reset_mac(lp); 750 751 /* Restore MAC Address */ 752 adrp = (u16 *) dev->dev_addr; 753 iowrite16(adrp[0], ioaddr + MID_0L); 754 iowrite16(adrp[1], ioaddr + MID_0M); 755 iowrite16(adrp[2], ioaddr + MID_0H); 756 } 757 758 static int r6040_open(struct net_device *dev) 759 { 760 struct r6040_private *lp = netdev_priv(dev); 761 int ret; 762 763 /* Request IRQ and Register interrupt handler */ 764 ret = request_irq(dev->irq, r6040_interrupt, 765 IRQF_SHARED, dev->name, dev); 766 if (ret) 767 goto out; 768 769 /* Set MAC address */ 770 r6040_mac_address(dev); 771 772 /* Allocate Descriptor memory */ 773 lp->rx_ring = 774 pci_alloc_consistent(lp->pdev, RX_DESC_SIZE, &lp->rx_ring_dma); 775 if (!lp->rx_ring) { 776 ret = -ENOMEM; 777 goto err_free_irq; 778 } 779 780 lp->tx_ring = 781 pci_alloc_consistent(lp->pdev, TX_DESC_SIZE, &lp->tx_ring_dma); 782 if (!lp->tx_ring) { 783 ret = -ENOMEM; 784 goto err_free_rx_ring; 785 } 786 787 ret = r6040_up(dev); 788 if (ret) 789 goto err_free_tx_ring; 790 791 napi_enable(&lp->napi); 792 netif_start_queue(dev); 793 794 return 0; 795 796 err_free_tx_ring: 797 pci_free_consistent(lp->pdev, TX_DESC_SIZE, lp->tx_ring, 798 lp->tx_ring_dma); 799 err_free_rx_ring: 800 pci_free_consistent(lp->pdev, RX_DESC_SIZE, lp->rx_ring, 801 lp->rx_ring_dma); 802 err_free_irq: 803 free_irq(dev->irq, dev); 804 out: 805 return ret; 806 } 807 808 static netdev_tx_t r6040_start_xmit(struct sk_buff *skb, 809 struct net_device *dev) 810 { 811 struct r6040_private *lp = netdev_priv(dev); 812 struct r6040_descriptor *descptr; 813 void __iomem *ioaddr = lp->base; 814 unsigned long flags; 815 816 /* Critical Section */ 817 spin_lock_irqsave(&lp->lock, flags); 818 819 /* TX resource check */ 820 if (!lp->tx_free_desc) { 821 spin_unlock_irqrestore(&lp->lock, flags); 822 netif_stop_queue(dev); 823 netdev_err(dev, ": no tx descriptor\n"); 824 return NETDEV_TX_BUSY; 825 } 826 827 /* Statistic Counter */ 828 dev->stats.tx_packets++; 829 dev->stats.tx_bytes += skb->len; 830 /* Set TX descriptor & Transmit it */ 831 lp->tx_free_desc--; 832 descptr = lp->tx_insert_ptr; 833 if (skb->len < ETH_ZLEN) 834 descptr->len = ETH_ZLEN; 835 else 836 descptr->len = skb->len; 837 838 descptr->skb_ptr = skb; 839 descptr->buf = cpu_to_le32(pci_map_single(lp->pdev, 840 skb->data, skb->len, PCI_DMA_TODEVICE)); 841 descptr->status = DSC_OWNER_MAC; 842 843 skb_tx_timestamp(skb); 844 845 /* Trigger the MAC to check the TX descriptor */ 846 iowrite16(TM2TX, ioaddr + MTPR); 847 lp->tx_insert_ptr = descptr->vndescp; 848 849 /* If no tx resource, stop */ 850 if (!lp->tx_free_desc) 851 netif_stop_queue(dev); 852 853 spin_unlock_irqrestore(&lp->lock, flags); 854 855 return NETDEV_TX_OK; 856 } 857 858 static void r6040_multicast_list(struct net_device *dev) 859 { 860 struct r6040_private *lp = netdev_priv(dev); 861 void __iomem *ioaddr = lp->base; 862 unsigned long flags; 863 struct netdev_hw_addr *ha; 864 int i; 865 u16 *adrp; 866 u16 hash_table[4] = { 0 }; 867 868 spin_lock_irqsave(&lp->lock, flags); 869 870 /* Keep our MAC Address */ 871 adrp = (u16 *)dev->dev_addr; 872 iowrite16(adrp[0], ioaddr + MID_0L); 873 iowrite16(adrp[1], ioaddr + MID_0M); 874 iowrite16(adrp[2], ioaddr + MID_0H); 875 876 /* Clear AMCP & PROM bits */ 877 lp->mcr0 = ioread16(ioaddr + MCR0) & ~(MCR0_PROMISC | MCR0_HASH_EN); 878 879 /* Promiscuous mode */ 880 if (dev->flags & IFF_PROMISC) 881 lp->mcr0 |= MCR0_PROMISC; 882 883 /* Enable multicast hash table function to 884 * receive all multicast packets. */ 885 else if (dev->flags & IFF_ALLMULTI) { 886 lp->mcr0 |= MCR0_HASH_EN; 887 888 for (i = 0; i < MCAST_MAX ; i++) { 889 iowrite16(0, ioaddr + MID_1L + 8 * i); 890 iowrite16(0, ioaddr + MID_1M + 8 * i); 891 iowrite16(0, ioaddr + MID_1H + 8 * i); 892 } 893 894 for (i = 0; i < 4; i++) 895 hash_table[i] = 0xffff; 896 } 897 /* Use internal multicast address registers if the number of 898 * multicast addresses is not greater than MCAST_MAX. */ 899 else if (netdev_mc_count(dev) <= MCAST_MAX) { 900 i = 0; 901 netdev_for_each_mc_addr(ha, dev) { 902 u16 *adrp = (u16 *) ha->addr; 903 iowrite16(adrp[0], ioaddr + MID_1L + 8 * i); 904 iowrite16(adrp[1], ioaddr + MID_1M + 8 * i); 905 iowrite16(adrp[2], ioaddr + MID_1H + 8 * i); 906 i++; 907 } 908 while (i < MCAST_MAX) { 909 iowrite16(0, ioaddr + MID_1L + 8 * i); 910 iowrite16(0, ioaddr + MID_1M + 8 * i); 911 iowrite16(0, ioaddr + MID_1H + 8 * i); 912 i++; 913 } 914 } 915 /* Otherwise, Enable multicast hash table function. */ 916 else { 917 u32 crc; 918 919 lp->mcr0 |= MCR0_HASH_EN; 920 921 for (i = 0; i < MCAST_MAX ; i++) { 922 iowrite16(0, ioaddr + MID_1L + 8 * i); 923 iowrite16(0, ioaddr + MID_1M + 8 * i); 924 iowrite16(0, ioaddr + MID_1H + 8 * i); 925 } 926 927 /* Build multicast hash table */ 928 netdev_for_each_mc_addr(ha, dev) { 929 u8 *addrs = ha->addr; 930 931 crc = ether_crc(ETH_ALEN, addrs); 932 crc >>= 26; 933 hash_table[crc >> 4] |= 1 << (crc & 0xf); 934 } 935 } 936 937 iowrite16(lp->mcr0, ioaddr + MCR0); 938 939 /* Fill the MAC hash tables with their values */ 940 if (lp->mcr0 & MCR0_HASH_EN) { 941 iowrite16(hash_table[0], ioaddr + MAR0); 942 iowrite16(hash_table[1], ioaddr + MAR1); 943 iowrite16(hash_table[2], ioaddr + MAR2); 944 iowrite16(hash_table[3], ioaddr + MAR3); 945 } 946 947 spin_unlock_irqrestore(&lp->lock, flags); 948 } 949 950 static void netdev_get_drvinfo(struct net_device *dev, 951 struct ethtool_drvinfo *info) 952 { 953 struct r6040_private *rp = netdev_priv(dev); 954 955 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 956 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 957 strlcpy(info->bus_info, pci_name(rp->pdev), sizeof(info->bus_info)); 958 } 959 960 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 961 { 962 struct r6040_private *rp = netdev_priv(dev); 963 964 return phy_ethtool_gset(rp->phydev, cmd); 965 } 966 967 static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 968 { 969 struct r6040_private *rp = netdev_priv(dev); 970 971 return phy_ethtool_sset(rp->phydev, cmd); 972 } 973 974 static const struct ethtool_ops netdev_ethtool_ops = { 975 .get_drvinfo = netdev_get_drvinfo, 976 .get_settings = netdev_get_settings, 977 .set_settings = netdev_set_settings, 978 .get_link = ethtool_op_get_link, 979 .get_ts_info = ethtool_op_get_ts_info, 980 }; 981 982 static const struct net_device_ops r6040_netdev_ops = { 983 .ndo_open = r6040_open, 984 .ndo_stop = r6040_close, 985 .ndo_start_xmit = r6040_start_xmit, 986 .ndo_get_stats = r6040_get_stats, 987 .ndo_set_rx_mode = r6040_multicast_list, 988 .ndo_change_mtu = eth_change_mtu, 989 .ndo_validate_addr = eth_validate_addr, 990 .ndo_set_mac_address = eth_mac_addr, 991 .ndo_do_ioctl = r6040_ioctl, 992 .ndo_tx_timeout = r6040_tx_timeout, 993 #ifdef CONFIG_NET_POLL_CONTROLLER 994 .ndo_poll_controller = r6040_poll_controller, 995 #endif 996 }; 997 998 static void r6040_adjust_link(struct net_device *dev) 999 { 1000 struct r6040_private *lp = netdev_priv(dev); 1001 struct phy_device *phydev = lp->phydev; 1002 int status_changed = 0; 1003 void __iomem *ioaddr = lp->base; 1004 1005 BUG_ON(!phydev); 1006 1007 if (lp->old_link != phydev->link) { 1008 status_changed = 1; 1009 lp->old_link = phydev->link; 1010 } 1011 1012 /* reflect duplex change */ 1013 if (phydev->link && (lp->old_duplex != phydev->duplex)) { 1014 lp->mcr0 |= (phydev->duplex == DUPLEX_FULL ? MCR0_FD : 0); 1015 iowrite16(lp->mcr0, ioaddr); 1016 1017 status_changed = 1; 1018 lp->old_duplex = phydev->duplex; 1019 } 1020 1021 if (status_changed) { 1022 pr_info("%s: link %s", dev->name, phydev->link ? 1023 "UP" : "DOWN"); 1024 if (phydev->link) 1025 pr_cont(" - %d/%s", phydev->speed, 1026 DUPLEX_FULL == phydev->duplex ? "full" : "half"); 1027 pr_cont("\n"); 1028 } 1029 } 1030 1031 static int r6040_mii_probe(struct net_device *dev) 1032 { 1033 struct r6040_private *lp = netdev_priv(dev); 1034 struct phy_device *phydev = NULL; 1035 1036 phydev = phy_find_first(lp->mii_bus); 1037 if (!phydev) { 1038 dev_err(&lp->pdev->dev, "no PHY found\n"); 1039 return -ENODEV; 1040 } 1041 1042 phydev = phy_connect(dev, dev_name(&phydev->dev), &r6040_adjust_link, 1043 PHY_INTERFACE_MODE_MII); 1044 1045 if (IS_ERR(phydev)) { 1046 dev_err(&lp->pdev->dev, "could not attach to PHY\n"); 1047 return PTR_ERR(phydev); 1048 } 1049 1050 /* mask with MAC supported features */ 1051 phydev->supported &= (SUPPORTED_10baseT_Half 1052 | SUPPORTED_10baseT_Full 1053 | SUPPORTED_100baseT_Half 1054 | SUPPORTED_100baseT_Full 1055 | SUPPORTED_Autoneg 1056 | SUPPORTED_MII 1057 | SUPPORTED_TP); 1058 1059 phydev->advertising = phydev->supported; 1060 lp->phydev = phydev; 1061 lp->old_link = 0; 1062 lp->old_duplex = -1; 1063 1064 dev_info(&lp->pdev->dev, "attached PHY driver [%s] " 1065 "(mii_bus:phy_addr=%s)\n", 1066 phydev->drv->name, dev_name(&phydev->dev)); 1067 1068 return 0; 1069 } 1070 1071 static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1072 { 1073 struct net_device *dev; 1074 struct r6040_private *lp; 1075 void __iomem *ioaddr; 1076 int err, io_size = R6040_IO_SIZE; 1077 static int card_idx = -1; 1078 int bar = 0; 1079 u16 *adrp; 1080 int i; 1081 1082 pr_info("%s\n", version); 1083 1084 err = pci_enable_device(pdev); 1085 if (err) 1086 goto err_out; 1087 1088 /* this should always be supported */ 1089 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 1090 if (err) { 1091 dev_err(&pdev->dev, "32-bit PCI DMA addresses" 1092 "not supported by the card\n"); 1093 goto err_out_disable_dev; 1094 } 1095 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 1096 if (err) { 1097 dev_err(&pdev->dev, "32-bit PCI DMA addresses" 1098 "not supported by the card\n"); 1099 goto err_out_disable_dev; 1100 } 1101 1102 /* IO Size check */ 1103 if (pci_resource_len(pdev, bar) < io_size) { 1104 dev_err(&pdev->dev, "Insufficient PCI resources, aborting\n"); 1105 err = -EIO; 1106 goto err_out_disable_dev; 1107 } 1108 1109 pci_set_master(pdev); 1110 1111 dev = alloc_etherdev(sizeof(struct r6040_private)); 1112 if (!dev) { 1113 err = -ENOMEM; 1114 goto err_out_disable_dev; 1115 } 1116 SET_NETDEV_DEV(dev, &pdev->dev); 1117 lp = netdev_priv(dev); 1118 1119 err = pci_request_regions(pdev, DRV_NAME); 1120 1121 if (err) { 1122 dev_err(&pdev->dev, "Failed to request PCI regions\n"); 1123 goto err_out_free_dev; 1124 } 1125 1126 ioaddr = pci_iomap(pdev, bar, io_size); 1127 if (!ioaddr) { 1128 dev_err(&pdev->dev, "ioremap failed for device\n"); 1129 err = -EIO; 1130 goto err_out_free_res; 1131 } 1132 1133 /* If PHY status change register is still set to zero it means the 1134 * bootloader didn't initialize it, so we set it to: 1135 * - enable phy status change 1136 * - enable all phy addresses 1137 * - set to lowest timer divider */ 1138 if (ioread16(ioaddr + PHY_CC) == 0) 1139 iowrite16(SCEN | PHY_MAX_ADDR << PHYAD_SHIFT | 1140 7 << TMRDIV_SHIFT, ioaddr + PHY_CC); 1141 1142 /* Init system & device */ 1143 lp->base = ioaddr; 1144 dev->irq = pdev->irq; 1145 1146 spin_lock_init(&lp->lock); 1147 pci_set_drvdata(pdev, dev); 1148 1149 /* Set MAC address */ 1150 card_idx++; 1151 1152 adrp = (u16 *)dev->dev_addr; 1153 adrp[0] = ioread16(ioaddr + MID_0L); 1154 adrp[1] = ioread16(ioaddr + MID_0M); 1155 adrp[2] = ioread16(ioaddr + MID_0H); 1156 1157 /* Some bootloader/BIOSes do not initialize 1158 * MAC address, warn about that */ 1159 if (!(adrp[0] || adrp[1] || adrp[2])) { 1160 netdev_warn(dev, "MAC address not initialized, " 1161 "generating random\n"); 1162 eth_hw_addr_random(dev); 1163 } 1164 1165 /* Link new device into r6040_root_dev */ 1166 lp->pdev = pdev; 1167 lp->dev = dev; 1168 1169 /* Init RDC private data */ 1170 lp->mcr0 = MCR0_XMTEN | MCR0_RCVEN; 1171 1172 /* The RDC-specific entries in the device structure. */ 1173 dev->netdev_ops = &r6040_netdev_ops; 1174 dev->ethtool_ops = &netdev_ethtool_ops; 1175 dev->watchdog_timeo = TX_TIMEOUT; 1176 1177 netif_napi_add(dev, &lp->napi, r6040_poll, 64); 1178 1179 lp->mii_bus = mdiobus_alloc(); 1180 if (!lp->mii_bus) { 1181 dev_err(&pdev->dev, "mdiobus_alloc() failed\n"); 1182 err = -ENOMEM; 1183 goto err_out_unmap; 1184 } 1185 1186 lp->mii_bus->priv = dev; 1187 lp->mii_bus->read = r6040_mdiobus_read; 1188 lp->mii_bus->write = r6040_mdiobus_write; 1189 lp->mii_bus->name = "r6040_eth_mii"; 1190 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 1191 dev_name(&pdev->dev), card_idx); 1192 lp->mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL); 1193 if (!lp->mii_bus->irq) { 1194 err = -ENOMEM; 1195 goto err_out_mdio; 1196 } 1197 1198 for (i = 0; i < PHY_MAX_ADDR; i++) 1199 lp->mii_bus->irq[i] = PHY_POLL; 1200 1201 err = mdiobus_register(lp->mii_bus); 1202 if (err) { 1203 dev_err(&pdev->dev, "failed to register MII bus\n"); 1204 goto err_out_mdio_irq; 1205 } 1206 1207 err = r6040_mii_probe(dev); 1208 if (err) { 1209 dev_err(&pdev->dev, "failed to probe MII bus\n"); 1210 goto err_out_mdio_unregister; 1211 } 1212 1213 /* Register net device. After this dev->name assign */ 1214 err = register_netdev(dev); 1215 if (err) { 1216 dev_err(&pdev->dev, "Failed to register net device\n"); 1217 goto err_out_mdio_unregister; 1218 } 1219 return 0; 1220 1221 err_out_mdio_unregister: 1222 mdiobus_unregister(lp->mii_bus); 1223 err_out_mdio_irq: 1224 kfree(lp->mii_bus->irq); 1225 err_out_mdio: 1226 mdiobus_free(lp->mii_bus); 1227 err_out_unmap: 1228 netif_napi_del(&lp->napi); 1229 pci_iounmap(pdev, ioaddr); 1230 err_out_free_res: 1231 pci_release_regions(pdev); 1232 err_out_free_dev: 1233 free_netdev(dev); 1234 err_out_disable_dev: 1235 pci_disable_device(pdev); 1236 err_out: 1237 return err; 1238 } 1239 1240 static void r6040_remove_one(struct pci_dev *pdev) 1241 { 1242 struct net_device *dev = pci_get_drvdata(pdev); 1243 struct r6040_private *lp = netdev_priv(dev); 1244 1245 unregister_netdev(dev); 1246 mdiobus_unregister(lp->mii_bus); 1247 kfree(lp->mii_bus->irq); 1248 mdiobus_free(lp->mii_bus); 1249 netif_napi_del(&lp->napi); 1250 pci_iounmap(pdev, lp->base); 1251 pci_release_regions(pdev); 1252 free_netdev(dev); 1253 pci_disable_device(pdev); 1254 } 1255 1256 1257 static const struct pci_device_id r6040_pci_tbl[] = { 1258 { PCI_DEVICE(PCI_VENDOR_ID_RDC, 0x6040) }, 1259 { 0 } 1260 }; 1261 MODULE_DEVICE_TABLE(pci, r6040_pci_tbl); 1262 1263 static struct pci_driver r6040_driver = { 1264 .name = DRV_NAME, 1265 .id_table = r6040_pci_tbl, 1266 .probe = r6040_init_one, 1267 .remove = r6040_remove_one, 1268 }; 1269 1270 module_pci_driver(r6040_driver); 1271