1 /*************************************************************************** 2 * 3 * Copyright (C) 2004-2008 SMSC 4 * Copyright (C) 2005-2008 ARM 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 * 20 *************************************************************************** 21 * Rewritten, heavily based on smsc911x simple driver by SMSC. 22 * Partly uses io macros from smc91x.c by Nicolas Pitre 23 * 24 * Supported devices: 25 * LAN9115, LAN9116, LAN9117, LAN9118 26 * LAN9215, LAN9216, LAN9217, LAN9218 27 * LAN9210, LAN9211 28 * LAN9220, LAN9221 29 * LAN89218 30 * 31 */ 32 33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 34 35 #include <linux/crc32.h> 36 #include <linux/delay.h> 37 #include <linux/errno.h> 38 #include <linux/etherdevice.h> 39 #include <linux/ethtool.h> 40 #include <linux/init.h> 41 #include <linux/interrupt.h> 42 #include <linux/ioport.h> 43 #include <linux/kernel.h> 44 #include <linux/module.h> 45 #include <linux/netdevice.h> 46 #include <linux/platform_device.h> 47 #include <linux/regulator/consumer.h> 48 #include <linux/sched.h> 49 #include <linux/timer.h> 50 #include <linux/bug.h> 51 #include <linux/bitops.h> 52 #include <linux/irq.h> 53 #include <linux/io.h> 54 #include <linux/swab.h> 55 #include <linux/phy.h> 56 #include <linux/smsc911x.h> 57 #include <linux/device.h> 58 #include <linux/of.h> 59 #include <linux/of_device.h> 60 #include <linux/of_gpio.h> 61 #include <linux/of_net.h> 62 #include "smsc911x.h" 63 64 #define SMSC_CHIPNAME "smsc911x" 65 #define SMSC_MDIONAME "smsc911x-mdio" 66 #define SMSC_DRV_VERSION "2008-10-21" 67 68 MODULE_LICENSE("GPL"); 69 MODULE_VERSION(SMSC_DRV_VERSION); 70 MODULE_ALIAS("platform:smsc911x"); 71 72 #if USE_DEBUG > 0 73 static int debug = 16; 74 #else 75 static int debug = 3; 76 #endif 77 78 module_param(debug, int, 0); 79 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 80 81 struct smsc911x_data; 82 83 struct smsc911x_ops { 84 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg); 85 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val); 86 void (*rx_readfifo)(struct smsc911x_data *pdata, 87 unsigned int *buf, unsigned int wordcount); 88 void (*tx_writefifo)(struct smsc911x_data *pdata, 89 unsigned int *buf, unsigned int wordcount); 90 }; 91 92 #define SMSC911X_NUM_SUPPLIES 2 93 94 struct smsc911x_data { 95 void __iomem *ioaddr; 96 97 unsigned int idrev; 98 99 /* used to decide which workarounds apply */ 100 unsigned int generation; 101 102 /* device configuration (copied from platform_data during probe) */ 103 struct smsc911x_platform_config config; 104 105 /* This needs to be acquired before calling any of below: 106 * smsc911x_mac_read(), smsc911x_mac_write() 107 */ 108 spinlock_t mac_lock; 109 110 /* spinlock to ensure register accesses are serialised */ 111 spinlock_t dev_lock; 112 113 struct phy_device *phy_dev; 114 struct mii_bus *mii_bus; 115 int phy_irq[PHY_MAX_ADDR]; 116 unsigned int using_extphy; 117 int last_duplex; 118 int last_carrier; 119 120 u32 msg_enable; 121 unsigned int gpio_setting; 122 unsigned int gpio_orig_setting; 123 struct net_device *dev; 124 struct napi_struct napi; 125 126 unsigned int software_irq_signal; 127 128 #ifdef USE_PHY_WORK_AROUND 129 #define MIN_PACKET_SIZE (64) 130 char loopback_tx_pkt[MIN_PACKET_SIZE]; 131 char loopback_rx_pkt[MIN_PACKET_SIZE]; 132 unsigned int resetcount; 133 #endif 134 135 /* Members for Multicast filter workaround */ 136 unsigned int multicast_update_pending; 137 unsigned int set_bits_mask; 138 unsigned int clear_bits_mask; 139 unsigned int hashhi; 140 unsigned int hashlo; 141 142 /* register access functions */ 143 const struct smsc911x_ops *ops; 144 145 /* regulators */ 146 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES]; 147 }; 148 149 /* Easy access to information */ 150 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift)) 151 152 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 153 { 154 if (pdata->config.flags & SMSC911X_USE_32BIT) 155 return readl(pdata->ioaddr + reg); 156 157 if (pdata->config.flags & SMSC911X_USE_16BIT) 158 return ((readw(pdata->ioaddr + reg) & 0xFFFF) | 159 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16)); 160 161 BUG(); 162 return 0; 163 } 164 165 static inline u32 166 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg) 167 { 168 if (pdata->config.flags & SMSC911X_USE_32BIT) 169 return readl(pdata->ioaddr + __smsc_shift(pdata, reg)); 170 171 if (pdata->config.flags & SMSC911X_USE_16BIT) 172 return (readw(pdata->ioaddr + 173 __smsc_shift(pdata, reg)) & 0xFFFF) | 174 ((readw(pdata->ioaddr + 175 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16); 176 177 BUG(); 178 return 0; 179 } 180 181 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 182 { 183 u32 data; 184 unsigned long flags; 185 186 spin_lock_irqsave(&pdata->dev_lock, flags); 187 data = pdata->ops->reg_read(pdata, reg); 188 spin_unlock_irqrestore(&pdata->dev_lock, flags); 189 190 return data; 191 } 192 193 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 194 u32 val) 195 { 196 if (pdata->config.flags & SMSC911X_USE_32BIT) { 197 writel(val, pdata->ioaddr + reg); 198 return; 199 } 200 201 if (pdata->config.flags & SMSC911X_USE_16BIT) { 202 writew(val & 0xFFFF, pdata->ioaddr + reg); 203 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2); 204 return; 205 } 206 207 BUG(); 208 } 209 210 static inline void 211 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val) 212 { 213 if (pdata->config.flags & SMSC911X_USE_32BIT) { 214 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg)); 215 return; 216 } 217 218 if (pdata->config.flags & SMSC911X_USE_16BIT) { 219 writew(val & 0xFFFF, 220 pdata->ioaddr + __smsc_shift(pdata, reg)); 221 writew((val >> 16) & 0xFFFF, 222 pdata->ioaddr + __smsc_shift(pdata, reg + 2)); 223 return; 224 } 225 226 BUG(); 227 } 228 229 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 230 u32 val) 231 { 232 unsigned long flags; 233 234 spin_lock_irqsave(&pdata->dev_lock, flags); 235 pdata->ops->reg_write(pdata, reg, val); 236 spin_unlock_irqrestore(&pdata->dev_lock, flags); 237 } 238 239 /* Writes a packet to the TX_DATA_FIFO */ 240 static inline void 241 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf, 242 unsigned int wordcount) 243 { 244 unsigned long flags; 245 246 spin_lock_irqsave(&pdata->dev_lock, flags); 247 248 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 249 while (wordcount--) 250 __smsc911x_reg_write(pdata, TX_DATA_FIFO, 251 swab32(*buf++)); 252 goto out; 253 } 254 255 if (pdata->config.flags & SMSC911X_USE_32BIT) { 256 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount); 257 goto out; 258 } 259 260 if (pdata->config.flags & SMSC911X_USE_16BIT) { 261 while (wordcount--) 262 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++); 263 goto out; 264 } 265 266 BUG(); 267 out: 268 spin_unlock_irqrestore(&pdata->dev_lock, flags); 269 } 270 271 /* Writes a packet to the TX_DATA_FIFO - shifted version */ 272 static inline void 273 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 274 unsigned int wordcount) 275 { 276 unsigned long flags; 277 278 spin_lock_irqsave(&pdata->dev_lock, flags); 279 280 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 281 while (wordcount--) 282 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO, 283 swab32(*buf++)); 284 goto out; 285 } 286 287 if (pdata->config.flags & SMSC911X_USE_32BIT) { 288 writesl(pdata->ioaddr + __smsc_shift(pdata, 289 TX_DATA_FIFO), buf, wordcount); 290 goto out; 291 } 292 293 if (pdata->config.flags & SMSC911X_USE_16BIT) { 294 while (wordcount--) 295 __smsc911x_reg_write_shift(pdata, 296 TX_DATA_FIFO, *buf++); 297 goto out; 298 } 299 300 BUG(); 301 out: 302 spin_unlock_irqrestore(&pdata->dev_lock, flags); 303 } 304 305 /* Reads a packet out of the RX_DATA_FIFO */ 306 static inline void 307 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf, 308 unsigned int wordcount) 309 { 310 unsigned long flags; 311 312 spin_lock_irqsave(&pdata->dev_lock, flags); 313 314 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 315 while (wordcount--) 316 *buf++ = swab32(__smsc911x_reg_read(pdata, 317 RX_DATA_FIFO)); 318 goto out; 319 } 320 321 if (pdata->config.flags & SMSC911X_USE_32BIT) { 322 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount); 323 goto out; 324 } 325 326 if (pdata->config.flags & SMSC911X_USE_16BIT) { 327 while (wordcount--) 328 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO); 329 goto out; 330 } 331 332 BUG(); 333 out: 334 spin_unlock_irqrestore(&pdata->dev_lock, flags); 335 } 336 337 /* Reads a packet out of the RX_DATA_FIFO - shifted version */ 338 static inline void 339 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 340 unsigned int wordcount) 341 { 342 unsigned long flags; 343 344 spin_lock_irqsave(&pdata->dev_lock, flags); 345 346 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 347 while (wordcount--) 348 *buf++ = swab32(__smsc911x_reg_read_shift(pdata, 349 RX_DATA_FIFO)); 350 goto out; 351 } 352 353 if (pdata->config.flags & SMSC911X_USE_32BIT) { 354 readsl(pdata->ioaddr + __smsc_shift(pdata, 355 RX_DATA_FIFO), buf, wordcount); 356 goto out; 357 } 358 359 if (pdata->config.flags & SMSC911X_USE_16BIT) { 360 while (wordcount--) 361 *buf++ = __smsc911x_reg_read_shift(pdata, 362 RX_DATA_FIFO); 363 goto out; 364 } 365 366 BUG(); 367 out: 368 spin_unlock_irqrestore(&pdata->dev_lock, flags); 369 } 370 371 /* 372 * enable resources, currently just regulators. 373 */ 374 static int smsc911x_enable_resources(struct platform_device *pdev) 375 { 376 struct net_device *ndev = platform_get_drvdata(pdev); 377 struct smsc911x_data *pdata = netdev_priv(ndev); 378 int ret = 0; 379 380 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies), 381 pdata->supplies); 382 if (ret) 383 netdev_err(ndev, "failed to enable regulators %d\n", 384 ret); 385 return ret; 386 } 387 388 /* 389 * disable resources, currently just regulators. 390 */ 391 static int smsc911x_disable_resources(struct platform_device *pdev) 392 { 393 struct net_device *ndev = platform_get_drvdata(pdev); 394 struct smsc911x_data *pdata = netdev_priv(ndev); 395 int ret = 0; 396 397 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies), 398 pdata->supplies); 399 return ret; 400 } 401 402 /* 403 * Request resources, currently just regulators. 404 * 405 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where 406 * these are not always-on we need to request regulators to be turned on 407 * before we can try to access the device registers. 408 */ 409 static int smsc911x_request_resources(struct platform_device *pdev) 410 { 411 struct net_device *ndev = platform_get_drvdata(pdev); 412 struct smsc911x_data *pdata = netdev_priv(ndev); 413 int ret = 0; 414 415 /* Request regulators */ 416 pdata->supplies[0].supply = "vdd33a"; 417 pdata->supplies[1].supply = "vddvario"; 418 ret = regulator_bulk_get(&pdev->dev, 419 ARRAY_SIZE(pdata->supplies), 420 pdata->supplies); 421 if (ret) 422 netdev_err(ndev, "couldn't get regulators %d\n", 423 ret); 424 return ret; 425 } 426 427 /* 428 * Free resources, currently just regulators. 429 * 430 */ 431 static void smsc911x_free_resources(struct platform_device *pdev) 432 { 433 struct net_device *ndev = platform_get_drvdata(pdev); 434 struct smsc911x_data *pdata = netdev_priv(ndev); 435 436 /* Free regulators */ 437 regulator_bulk_free(ARRAY_SIZE(pdata->supplies), 438 pdata->supplies); 439 } 440 441 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read 442 * and smsc911x_mac_write, so assumes mac_lock is held */ 443 static int smsc911x_mac_complete(struct smsc911x_data *pdata) 444 { 445 int i; 446 u32 val; 447 448 SMSC_ASSERT_MAC_LOCK(pdata); 449 450 for (i = 0; i < 40; i++) { 451 val = smsc911x_reg_read(pdata, MAC_CSR_CMD); 452 if (!(val & MAC_CSR_CMD_CSR_BUSY_)) 453 return 0; 454 } 455 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. " 456 "MAC_CSR_CMD: 0x%08X", val); 457 return -EIO; 458 } 459 460 /* Fetches a MAC register value. Assumes mac_lock is acquired */ 461 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset) 462 { 463 unsigned int temp; 464 465 SMSC_ASSERT_MAC_LOCK(pdata); 466 467 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 468 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 469 SMSC_WARN(pdata, hw, "MAC busy at entry"); 470 return 0xFFFFFFFF; 471 } 472 473 /* Send the MAC cmd */ 474 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 475 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_)); 476 477 /* Workaround for hardware read-after-write restriction */ 478 temp = smsc911x_reg_read(pdata, BYTE_TEST); 479 480 /* Wait for the read to complete */ 481 if (likely(smsc911x_mac_complete(pdata) == 0)) 482 return smsc911x_reg_read(pdata, MAC_CSR_DATA); 483 484 SMSC_WARN(pdata, hw, "MAC busy after read"); 485 return 0xFFFFFFFF; 486 } 487 488 /* Set a mac register, mac_lock must be acquired before calling */ 489 static void smsc911x_mac_write(struct smsc911x_data *pdata, 490 unsigned int offset, u32 val) 491 { 492 unsigned int temp; 493 494 SMSC_ASSERT_MAC_LOCK(pdata); 495 496 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 497 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 498 SMSC_WARN(pdata, hw, 499 "smsc911x_mac_write failed, MAC busy at entry"); 500 return; 501 } 502 503 /* Send data to write */ 504 smsc911x_reg_write(pdata, MAC_CSR_DATA, val); 505 506 /* Write the actual data */ 507 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 508 MAC_CSR_CMD_CSR_BUSY_)); 509 510 /* Workaround for hardware read-after-write restriction */ 511 temp = smsc911x_reg_read(pdata, BYTE_TEST); 512 513 /* Wait for the write to complete */ 514 if (likely(smsc911x_mac_complete(pdata) == 0)) 515 return; 516 517 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write"); 518 } 519 520 /* Get a phy register */ 521 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx) 522 { 523 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 524 unsigned long flags; 525 unsigned int addr; 526 int i, reg; 527 528 spin_lock_irqsave(&pdata->mac_lock, flags); 529 530 /* Confirm MII not busy */ 531 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 532 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???"); 533 reg = -EIO; 534 goto out; 535 } 536 537 /* Set the address, index & direction (read from PHY) */ 538 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6); 539 smsc911x_mac_write(pdata, MII_ACC, addr); 540 541 /* Wait for read to complete w/ timeout */ 542 for (i = 0; i < 100; i++) 543 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 544 reg = smsc911x_mac_read(pdata, MII_DATA); 545 goto out; 546 } 547 548 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish"); 549 reg = -EIO; 550 551 out: 552 spin_unlock_irqrestore(&pdata->mac_lock, flags); 553 return reg; 554 } 555 556 /* Set a phy register */ 557 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx, 558 u16 val) 559 { 560 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 561 unsigned long flags; 562 unsigned int addr; 563 int i, reg; 564 565 spin_lock_irqsave(&pdata->mac_lock, flags); 566 567 /* Confirm MII not busy */ 568 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 569 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???"); 570 reg = -EIO; 571 goto out; 572 } 573 574 /* Put the data to write in the MAC */ 575 smsc911x_mac_write(pdata, MII_DATA, val); 576 577 /* Set the address, index & direction (write to PHY) */ 578 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | 579 MII_ACC_MII_WRITE_; 580 smsc911x_mac_write(pdata, MII_ACC, addr); 581 582 /* Wait for write to complete w/ timeout */ 583 for (i = 0; i < 100; i++) 584 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 585 reg = 0; 586 goto out; 587 } 588 589 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish"); 590 reg = -EIO; 591 592 out: 593 spin_unlock_irqrestore(&pdata->mac_lock, flags); 594 return reg; 595 } 596 597 /* Switch to external phy. Assumes tx and rx are stopped. */ 598 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) 599 { 600 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 601 602 /* Disable phy clocks to the MAC */ 603 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 604 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; 605 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 606 udelay(10); /* Enough time for clocks to stop */ 607 608 /* Switch to external phy */ 609 hwcfg |= HW_CFG_EXT_PHY_EN_; 610 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 611 612 /* Enable phy clocks to the MAC */ 613 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 614 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; 615 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 616 udelay(10); /* Enough time for clocks to restart */ 617 618 hwcfg |= HW_CFG_SMI_SEL_; 619 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 620 } 621 622 /* Autodetects and enables external phy if present on supported chips. 623 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY 624 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ 625 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) 626 { 627 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 628 629 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { 630 SMSC_TRACE(pdata, hw, "Forcing internal PHY"); 631 pdata->using_extphy = 0; 632 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { 633 SMSC_TRACE(pdata, hw, "Forcing external PHY"); 634 smsc911x_phy_enable_external(pdata); 635 pdata->using_extphy = 1; 636 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { 637 SMSC_TRACE(pdata, hw, 638 "HW_CFG EXT_PHY_DET set, using external PHY"); 639 smsc911x_phy_enable_external(pdata); 640 pdata->using_extphy = 1; 641 } else { 642 SMSC_TRACE(pdata, hw, 643 "HW_CFG EXT_PHY_DET clear, using internal PHY"); 644 pdata->using_extphy = 0; 645 } 646 } 647 648 /* Fetches a tx status out of the status fifo */ 649 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata) 650 { 651 unsigned int result = 652 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_; 653 654 if (result != 0) 655 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO); 656 657 return result; 658 } 659 660 /* Fetches the next rx status */ 661 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata) 662 { 663 unsigned int result = 664 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_; 665 666 if (result != 0) 667 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO); 668 669 return result; 670 } 671 672 #ifdef USE_PHY_WORK_AROUND 673 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata) 674 { 675 unsigned int tries; 676 u32 wrsz; 677 u32 rdsz; 678 ulong bufp; 679 680 for (tries = 0; tries < 10; tries++) { 681 unsigned int txcmd_a; 682 unsigned int txcmd_b; 683 unsigned int status; 684 unsigned int pktlength; 685 unsigned int i; 686 687 /* Zero-out rx packet memory */ 688 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE); 689 690 /* Write tx packet to 118 */ 691 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16; 692 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 693 txcmd_a |= MIN_PACKET_SIZE; 694 695 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE; 696 697 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a); 698 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b); 699 700 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3); 701 wrsz = MIN_PACKET_SIZE + 3; 702 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3); 703 wrsz >>= 2; 704 705 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 706 707 /* Wait till transmit is done */ 708 i = 60; 709 do { 710 udelay(5); 711 status = smsc911x_tx_get_txstatus(pdata); 712 } while ((i--) && (!status)); 713 714 if (!status) { 715 SMSC_WARN(pdata, hw, 716 "Failed to transmit during loopback test"); 717 continue; 718 } 719 if (status & TX_STS_ES_) { 720 SMSC_WARN(pdata, hw, 721 "Transmit encountered errors during loopback test"); 722 continue; 723 } 724 725 /* Wait till receive is done */ 726 i = 60; 727 do { 728 udelay(5); 729 status = smsc911x_rx_get_rxstatus(pdata); 730 } while ((i--) && (!status)); 731 732 if (!status) { 733 SMSC_WARN(pdata, hw, 734 "Failed to receive during loopback test"); 735 continue; 736 } 737 if (status & RX_STS_ES_) { 738 SMSC_WARN(pdata, hw, 739 "Receive encountered errors during loopback test"); 740 continue; 741 } 742 743 pktlength = ((status & 0x3FFF0000UL) >> 16); 744 bufp = (ulong)pdata->loopback_rx_pkt; 745 rdsz = pktlength + 3; 746 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3); 747 rdsz >>= 2; 748 749 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz); 750 751 if (pktlength != (MIN_PACKET_SIZE + 4)) { 752 SMSC_WARN(pdata, hw, "Unexpected packet size " 753 "during loop back test, size=%d, will retry", 754 pktlength); 755 } else { 756 unsigned int j; 757 int mismatch = 0; 758 for (j = 0; j < MIN_PACKET_SIZE; j++) { 759 if (pdata->loopback_tx_pkt[j] 760 != pdata->loopback_rx_pkt[j]) { 761 mismatch = 1; 762 break; 763 } 764 } 765 if (!mismatch) { 766 SMSC_TRACE(pdata, hw, "Successfully verified " 767 "loopback packet"); 768 return 0; 769 } else { 770 SMSC_WARN(pdata, hw, "Data mismatch " 771 "during loop back test, will retry"); 772 } 773 } 774 } 775 776 return -EIO; 777 } 778 779 static int smsc911x_phy_reset(struct smsc911x_data *pdata) 780 { 781 struct phy_device *phy_dev = pdata->phy_dev; 782 unsigned int temp; 783 unsigned int i = 100000; 784 785 BUG_ON(!phy_dev); 786 BUG_ON(!phy_dev->bus); 787 788 SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset"); 789 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET); 790 do { 791 msleep(1); 792 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, 793 MII_BMCR); 794 } while ((i--) && (temp & BMCR_RESET)); 795 796 if (temp & BMCR_RESET) { 797 SMSC_WARN(pdata, hw, "PHY reset failed to complete"); 798 return -EIO; 799 } 800 /* Extra delay required because the phy may not be completed with 801 * its reset when BMCR_RESET is cleared. Specs say 256 uS is 802 * enough delay but using 1ms here to be safe */ 803 msleep(1); 804 805 return 0; 806 } 807 808 static int smsc911x_phy_loopbacktest(struct net_device *dev) 809 { 810 struct smsc911x_data *pdata = netdev_priv(dev); 811 struct phy_device *phy_dev = pdata->phy_dev; 812 int result = -EIO; 813 unsigned int i, val; 814 unsigned long flags; 815 816 /* Initialise tx packet using broadcast destination address */ 817 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN); 818 819 /* Use incrementing source address */ 820 for (i = 6; i < 12; i++) 821 pdata->loopback_tx_pkt[i] = (char)i; 822 823 /* Set length type field */ 824 pdata->loopback_tx_pkt[12] = 0x00; 825 pdata->loopback_tx_pkt[13] = 0x00; 826 827 for (i = 14; i < MIN_PACKET_SIZE; i++) 828 pdata->loopback_tx_pkt[i] = (char)i; 829 830 val = smsc911x_reg_read(pdata, HW_CFG); 831 val &= HW_CFG_TX_FIF_SZ_; 832 val |= HW_CFG_SF_; 833 smsc911x_reg_write(pdata, HW_CFG, val); 834 835 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 836 smsc911x_reg_write(pdata, RX_CFG, 837 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8); 838 839 for (i = 0; i < 10; i++) { 840 /* Set PHY to 10/FD, no ANEG, and loopback mode */ 841 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 842 BMCR_LOOPBACK | BMCR_FULLDPLX); 843 844 /* Enable MAC tx/rx, FD */ 845 spin_lock_irqsave(&pdata->mac_lock, flags); 846 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_ 847 | MAC_CR_TXEN_ | MAC_CR_RXEN_); 848 spin_unlock_irqrestore(&pdata->mac_lock, flags); 849 850 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) { 851 result = 0; 852 break; 853 } 854 pdata->resetcount++; 855 856 /* Disable MAC rx */ 857 spin_lock_irqsave(&pdata->mac_lock, flags); 858 smsc911x_mac_write(pdata, MAC_CR, 0); 859 spin_unlock_irqrestore(&pdata->mac_lock, flags); 860 861 smsc911x_phy_reset(pdata); 862 } 863 864 /* Disable MAC */ 865 spin_lock_irqsave(&pdata->mac_lock, flags); 866 smsc911x_mac_write(pdata, MAC_CR, 0); 867 spin_unlock_irqrestore(&pdata->mac_lock, flags); 868 869 /* Cancel PHY loopback mode */ 870 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0); 871 872 smsc911x_reg_write(pdata, TX_CFG, 0); 873 smsc911x_reg_write(pdata, RX_CFG, 0); 874 875 return result; 876 } 877 #endif /* USE_PHY_WORK_AROUND */ 878 879 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata) 880 { 881 struct phy_device *phy_dev = pdata->phy_dev; 882 u32 afc = smsc911x_reg_read(pdata, AFC_CFG); 883 u32 flow; 884 unsigned long flags; 885 886 if (phy_dev->duplex == DUPLEX_FULL) { 887 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); 888 u16 rmtadv = phy_read(phy_dev, MII_LPA); 889 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 890 891 if (cap & FLOW_CTRL_RX) 892 flow = 0xFFFF0002; 893 else 894 flow = 0; 895 896 if (cap & FLOW_CTRL_TX) 897 afc |= 0xF; 898 else 899 afc &= ~0xF; 900 901 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s", 902 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 903 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 904 } else { 905 SMSC_TRACE(pdata, hw, "half duplex"); 906 flow = 0; 907 afc |= 0xF; 908 } 909 910 spin_lock_irqsave(&pdata->mac_lock, flags); 911 smsc911x_mac_write(pdata, FLOW, flow); 912 spin_unlock_irqrestore(&pdata->mac_lock, flags); 913 914 smsc911x_reg_write(pdata, AFC_CFG, afc); 915 } 916 917 /* Update link mode if anything has changed. Called periodically when the 918 * PHY is in polling mode, even if nothing has changed. */ 919 static void smsc911x_phy_adjust_link(struct net_device *dev) 920 { 921 struct smsc911x_data *pdata = netdev_priv(dev); 922 struct phy_device *phy_dev = pdata->phy_dev; 923 unsigned long flags; 924 int carrier; 925 926 if (phy_dev->duplex != pdata->last_duplex) { 927 unsigned int mac_cr; 928 SMSC_TRACE(pdata, hw, "duplex state has changed"); 929 930 spin_lock_irqsave(&pdata->mac_lock, flags); 931 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 932 if (phy_dev->duplex) { 933 SMSC_TRACE(pdata, hw, 934 "configuring for full duplex mode"); 935 mac_cr |= MAC_CR_FDPX_; 936 } else { 937 SMSC_TRACE(pdata, hw, 938 "configuring for half duplex mode"); 939 mac_cr &= ~MAC_CR_FDPX_; 940 } 941 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 942 spin_unlock_irqrestore(&pdata->mac_lock, flags); 943 944 smsc911x_phy_update_flowcontrol(pdata); 945 pdata->last_duplex = phy_dev->duplex; 946 } 947 948 carrier = netif_carrier_ok(dev); 949 if (carrier != pdata->last_carrier) { 950 SMSC_TRACE(pdata, hw, "carrier state has changed"); 951 if (carrier) { 952 SMSC_TRACE(pdata, hw, "configuring for carrier OK"); 953 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) && 954 (!pdata->using_extphy)) { 955 /* Restore original GPIO configuration */ 956 pdata->gpio_setting = pdata->gpio_orig_setting; 957 smsc911x_reg_write(pdata, GPIO_CFG, 958 pdata->gpio_setting); 959 } 960 } else { 961 SMSC_TRACE(pdata, hw, "configuring for no carrier"); 962 /* Check global setting that LED1 963 * usage is 10/100 indicator */ 964 pdata->gpio_setting = smsc911x_reg_read(pdata, 965 GPIO_CFG); 966 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) && 967 (!pdata->using_extphy)) { 968 /* Force 10/100 LED off, after saving 969 * original GPIO configuration */ 970 pdata->gpio_orig_setting = pdata->gpio_setting; 971 972 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_; 973 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_ 974 | GPIO_CFG_GPIODIR0_ 975 | GPIO_CFG_GPIOD0_); 976 smsc911x_reg_write(pdata, GPIO_CFG, 977 pdata->gpio_setting); 978 } 979 } 980 pdata->last_carrier = carrier; 981 } 982 } 983 984 static int smsc911x_mii_probe(struct net_device *dev) 985 { 986 struct smsc911x_data *pdata = netdev_priv(dev); 987 struct phy_device *phydev = NULL; 988 int ret; 989 990 /* find the first phy */ 991 phydev = phy_find_first(pdata->mii_bus); 992 if (!phydev) { 993 netdev_err(dev, "no PHY found\n"); 994 return -ENODEV; 995 } 996 997 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X", 998 phydev->addr, phydev->phy_id); 999 1000 ret = phy_connect_direct(dev, phydev, 1001 &smsc911x_phy_adjust_link, 0, 1002 pdata->config.phy_interface); 1003 1004 if (ret) { 1005 netdev_err(dev, "Could not attach to PHY\n"); 1006 return ret; 1007 } 1008 1009 netdev_info(dev, 1010 "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", 1011 phydev->drv->name, dev_name(&phydev->dev), phydev->irq); 1012 1013 /* mask with MAC supported features */ 1014 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | 1015 SUPPORTED_Asym_Pause); 1016 phydev->advertising = phydev->supported; 1017 1018 pdata->phy_dev = phydev; 1019 pdata->last_duplex = -1; 1020 pdata->last_carrier = -1; 1021 1022 #ifdef USE_PHY_WORK_AROUND 1023 if (smsc911x_phy_loopbacktest(dev) < 0) { 1024 SMSC_WARN(pdata, hw, "Failed Loop Back Test"); 1025 return -ENODEV; 1026 } 1027 SMSC_TRACE(pdata, hw, "Passed Loop Back Test"); 1028 #endif /* USE_PHY_WORK_AROUND */ 1029 1030 SMSC_TRACE(pdata, hw, "phy initialised successfully"); 1031 return 0; 1032 } 1033 1034 static int __devinit smsc911x_mii_init(struct platform_device *pdev, 1035 struct net_device *dev) 1036 { 1037 struct smsc911x_data *pdata = netdev_priv(dev); 1038 int err = -ENXIO, i; 1039 1040 pdata->mii_bus = mdiobus_alloc(); 1041 if (!pdata->mii_bus) { 1042 err = -ENOMEM; 1043 goto err_out_1; 1044 } 1045 1046 pdata->mii_bus->name = SMSC_MDIONAME; 1047 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 1048 pdev->name, pdev->id); 1049 pdata->mii_bus->priv = pdata; 1050 pdata->mii_bus->read = smsc911x_mii_read; 1051 pdata->mii_bus->write = smsc911x_mii_write; 1052 pdata->mii_bus->irq = pdata->phy_irq; 1053 for (i = 0; i < PHY_MAX_ADDR; ++i) 1054 pdata->mii_bus->irq[i] = PHY_POLL; 1055 1056 pdata->mii_bus->parent = &pdev->dev; 1057 1058 switch (pdata->idrev & 0xFFFF0000) { 1059 case 0x01170000: 1060 case 0x01150000: 1061 case 0x117A0000: 1062 case 0x115A0000: 1063 /* External PHY supported, try to autodetect */ 1064 smsc911x_phy_initialise_external(pdata); 1065 break; 1066 default: 1067 SMSC_TRACE(pdata, hw, "External PHY is not supported, " 1068 "using internal PHY"); 1069 pdata->using_extphy = 0; 1070 break; 1071 } 1072 1073 if (!pdata->using_extphy) { 1074 /* Mask all PHYs except ID 1 (internal) */ 1075 pdata->mii_bus->phy_mask = ~(1 << 1); 1076 } 1077 1078 if (mdiobus_register(pdata->mii_bus)) { 1079 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1080 goto err_out_free_bus_2; 1081 } 1082 1083 if (smsc911x_mii_probe(dev) < 0) { 1084 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1085 goto err_out_unregister_bus_3; 1086 } 1087 1088 return 0; 1089 1090 err_out_unregister_bus_3: 1091 mdiobus_unregister(pdata->mii_bus); 1092 err_out_free_bus_2: 1093 mdiobus_free(pdata->mii_bus); 1094 err_out_1: 1095 return err; 1096 } 1097 1098 /* Gets the number of tx statuses in the fifo */ 1099 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata) 1100 { 1101 return (smsc911x_reg_read(pdata, TX_FIFO_INF) 1102 & TX_FIFO_INF_TSUSED_) >> 16; 1103 } 1104 1105 /* Reads tx statuses and increments counters where necessary */ 1106 static void smsc911x_tx_update_txcounters(struct net_device *dev) 1107 { 1108 struct smsc911x_data *pdata = netdev_priv(dev); 1109 unsigned int tx_stat; 1110 1111 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) { 1112 if (unlikely(tx_stat & 0x80000000)) { 1113 /* In this driver the packet tag is used as the packet 1114 * length. Since a packet length can never reach the 1115 * size of 0x8000, this bit is reserved. It is worth 1116 * noting that the "reserved bit" in the warning above 1117 * does not reference a hardware defined reserved bit 1118 * but rather a driver defined one. 1119 */ 1120 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high"); 1121 } else { 1122 if (unlikely(tx_stat & TX_STS_ES_)) { 1123 dev->stats.tx_errors++; 1124 } else { 1125 dev->stats.tx_packets++; 1126 dev->stats.tx_bytes += (tx_stat >> 16); 1127 } 1128 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) { 1129 dev->stats.collisions += 16; 1130 dev->stats.tx_aborted_errors += 1; 1131 } else { 1132 dev->stats.collisions += 1133 ((tx_stat >> 3) & 0xF); 1134 } 1135 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_)) 1136 dev->stats.tx_carrier_errors += 1; 1137 if (unlikely(tx_stat & TX_STS_LATE_COL_)) { 1138 dev->stats.collisions++; 1139 dev->stats.tx_aborted_errors++; 1140 } 1141 } 1142 } 1143 } 1144 1145 /* Increments the Rx error counters */ 1146 static void 1147 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat) 1148 { 1149 int crc_err = 0; 1150 1151 if (unlikely(rxstat & RX_STS_ES_)) { 1152 dev->stats.rx_errors++; 1153 if (unlikely(rxstat & RX_STS_CRC_ERR_)) { 1154 dev->stats.rx_crc_errors++; 1155 crc_err = 1; 1156 } 1157 } 1158 if (likely(!crc_err)) { 1159 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) && 1160 (rxstat & RX_STS_LENGTH_ERR_))) 1161 dev->stats.rx_length_errors++; 1162 if (rxstat & RX_STS_MCAST_) 1163 dev->stats.multicast++; 1164 } 1165 } 1166 1167 /* Quickly dumps bad packets */ 1168 static void 1169 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes) 1170 { 1171 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2; 1172 1173 if (likely(pktwords >= 4)) { 1174 unsigned int timeout = 500; 1175 unsigned int val; 1176 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_); 1177 do { 1178 udelay(1); 1179 val = smsc911x_reg_read(pdata, RX_DP_CTRL); 1180 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout); 1181 1182 if (unlikely(timeout == 0)) 1183 SMSC_WARN(pdata, hw, "Timed out waiting for " 1184 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val); 1185 } else { 1186 unsigned int temp; 1187 while (pktwords--) 1188 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO); 1189 } 1190 } 1191 1192 /* NAPI poll function */ 1193 static int smsc911x_poll(struct napi_struct *napi, int budget) 1194 { 1195 struct smsc911x_data *pdata = 1196 container_of(napi, struct smsc911x_data, napi); 1197 struct net_device *dev = pdata->dev; 1198 int npackets = 0; 1199 1200 while (npackets < budget) { 1201 unsigned int pktlength; 1202 unsigned int pktwords; 1203 struct sk_buff *skb; 1204 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata); 1205 1206 if (!rxstat) { 1207 unsigned int temp; 1208 /* We processed all packets available. Tell NAPI it can 1209 * stop polling then re-enable rx interrupts */ 1210 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_); 1211 napi_complete(napi); 1212 temp = smsc911x_reg_read(pdata, INT_EN); 1213 temp |= INT_EN_RSFL_EN_; 1214 smsc911x_reg_write(pdata, INT_EN, temp); 1215 break; 1216 } 1217 1218 /* Count packet for NAPI scheduling, even if it has an error. 1219 * Error packets still require cycles to discard */ 1220 npackets++; 1221 1222 pktlength = ((rxstat & 0x3FFF0000) >> 16); 1223 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2; 1224 smsc911x_rx_counterrors(dev, rxstat); 1225 1226 if (unlikely(rxstat & RX_STS_ES_)) { 1227 SMSC_WARN(pdata, rx_err, 1228 "Discarding packet with error bit set"); 1229 /* Packet has an error, discard it and continue with 1230 * the next */ 1231 smsc911x_rx_fastforward(pdata, pktwords); 1232 dev->stats.rx_dropped++; 1233 continue; 1234 } 1235 1236 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN); 1237 if (unlikely(!skb)) { 1238 SMSC_WARN(pdata, rx_err, 1239 "Unable to allocate skb for rx packet"); 1240 /* Drop the packet and stop this polling iteration */ 1241 smsc911x_rx_fastforward(pdata, pktwords); 1242 dev->stats.rx_dropped++; 1243 break; 1244 } 1245 1246 skb->data = skb->head; 1247 skb_reset_tail_pointer(skb); 1248 1249 /* Align IP on 16B boundary */ 1250 skb_reserve(skb, NET_IP_ALIGN); 1251 skb_put(skb, pktlength - 4); 1252 pdata->ops->rx_readfifo(pdata, 1253 (unsigned int *)skb->head, pktwords); 1254 skb->protocol = eth_type_trans(skb, dev); 1255 skb_checksum_none_assert(skb); 1256 netif_receive_skb(skb); 1257 1258 /* Update counters */ 1259 dev->stats.rx_packets++; 1260 dev->stats.rx_bytes += (pktlength - 4); 1261 } 1262 1263 /* Return total received packets */ 1264 return npackets; 1265 } 1266 1267 /* Returns hash bit number for given MAC address 1268 * Example: 1269 * 01 00 5E 00 00 01 -> returns bit number 31 */ 1270 static unsigned int smsc911x_hash(char addr[ETH_ALEN]) 1271 { 1272 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 1273 } 1274 1275 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata) 1276 { 1277 /* Performs the multicast & mac_cr update. This is called when 1278 * safe on the current hardware, and with the mac_lock held */ 1279 unsigned int mac_cr; 1280 1281 SMSC_ASSERT_MAC_LOCK(pdata); 1282 1283 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1284 mac_cr |= pdata->set_bits_mask; 1285 mac_cr &= ~(pdata->clear_bits_mask); 1286 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1287 smsc911x_mac_write(pdata, HASHH, pdata->hashhi); 1288 smsc911x_mac_write(pdata, HASHL, pdata->hashlo); 1289 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X", 1290 mac_cr, pdata->hashhi, pdata->hashlo); 1291 } 1292 1293 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata) 1294 { 1295 unsigned int mac_cr; 1296 1297 /* This function is only called for older LAN911x devices 1298 * (revA or revB), where MAC_CR, HASHH and HASHL should not 1299 * be modified during Rx - newer devices immediately update the 1300 * registers. 1301 * 1302 * This is called from interrupt context */ 1303 1304 spin_lock(&pdata->mac_lock); 1305 1306 /* Check Rx has stopped */ 1307 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_) 1308 SMSC_WARN(pdata, drv, "Rx not stopped"); 1309 1310 /* Perform the update - safe to do now Rx has stopped */ 1311 smsc911x_rx_multicast_update(pdata); 1312 1313 /* Re-enable Rx */ 1314 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1315 mac_cr |= MAC_CR_RXEN_; 1316 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1317 1318 pdata->multicast_update_pending = 0; 1319 1320 spin_unlock(&pdata->mac_lock); 1321 } 1322 1323 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata) 1324 { 1325 int rc = 0; 1326 1327 if (!pdata->phy_dev) 1328 return rc; 1329 1330 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS); 1331 1332 if (rc < 0) { 1333 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1334 return rc; 1335 } 1336 1337 /* 1338 * If energy is detected the PHY is already awake so is not necessary 1339 * to disable the energy detect power-down mode. 1340 */ 1341 if ((rc & MII_LAN83C185_EDPWRDOWN) && 1342 !(rc & MII_LAN83C185_ENERGYON)) { 1343 /* Disable energy detect mode for this SMSC Transceivers */ 1344 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS, 1345 rc & (~MII_LAN83C185_EDPWRDOWN)); 1346 1347 if (rc < 0) { 1348 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1349 return rc; 1350 } 1351 1352 mdelay(1); 1353 } 1354 1355 return 0; 1356 } 1357 1358 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata) 1359 { 1360 int rc = 0; 1361 1362 if (!pdata->phy_dev) 1363 return rc; 1364 1365 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS); 1366 1367 if (rc < 0) { 1368 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1369 return rc; 1370 } 1371 1372 /* Only enable if energy detect mode is already disabled */ 1373 if (!(rc & MII_LAN83C185_EDPWRDOWN)) { 1374 mdelay(100); 1375 /* Enable energy detect mode for this SMSC Transceivers */ 1376 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS, 1377 rc | MII_LAN83C185_EDPWRDOWN); 1378 1379 if (rc < 0) { 1380 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1381 return rc; 1382 } 1383 1384 mdelay(1); 1385 } 1386 return 0; 1387 } 1388 1389 static int smsc911x_soft_reset(struct smsc911x_data *pdata) 1390 { 1391 unsigned int timeout; 1392 unsigned int temp; 1393 int ret; 1394 1395 /* 1396 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that 1397 * are initialized in a Energy Detect Power-Down mode that prevents 1398 * the MAC chip to be software reseted. So we have to wakeup the PHY 1399 * before. 1400 */ 1401 if (pdata->generation == 4) { 1402 ret = smsc911x_phy_disable_energy_detect(pdata); 1403 1404 if (ret) { 1405 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1406 return ret; 1407 } 1408 } 1409 1410 /* Reset the LAN911x */ 1411 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_); 1412 timeout = 10; 1413 do { 1414 udelay(10); 1415 temp = smsc911x_reg_read(pdata, HW_CFG); 1416 } while ((--timeout) && (temp & HW_CFG_SRST_)); 1417 1418 if (unlikely(temp & HW_CFG_SRST_)) { 1419 SMSC_WARN(pdata, drv, "Failed to complete reset"); 1420 return -EIO; 1421 } 1422 1423 if (pdata->generation == 4) { 1424 ret = smsc911x_phy_enable_energy_detect(pdata); 1425 1426 if (ret) { 1427 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1428 return ret; 1429 } 1430 } 1431 1432 return 0; 1433 } 1434 1435 /* Sets the device MAC address to dev_addr, called with mac_lock held */ 1436 static void 1437 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6]) 1438 { 1439 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; 1440 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | 1441 (dev_addr[1] << 8) | dev_addr[0]; 1442 1443 SMSC_ASSERT_MAC_LOCK(pdata); 1444 1445 smsc911x_mac_write(pdata, ADDRH, mac_high16); 1446 smsc911x_mac_write(pdata, ADDRL, mac_low32); 1447 } 1448 1449 static int smsc911x_open(struct net_device *dev) 1450 { 1451 struct smsc911x_data *pdata = netdev_priv(dev); 1452 unsigned int timeout; 1453 unsigned int temp; 1454 unsigned int intcfg; 1455 1456 /* if the phy is not yet registered, retry later*/ 1457 if (!pdata->phy_dev) { 1458 SMSC_WARN(pdata, hw, "phy_dev is NULL"); 1459 return -EAGAIN; 1460 } 1461 1462 if (!is_valid_ether_addr(dev->dev_addr)) { 1463 SMSC_WARN(pdata, hw, "dev_addr is not a valid MAC address"); 1464 return -EADDRNOTAVAIL; 1465 } 1466 1467 /* Reset the LAN911x */ 1468 if (smsc911x_soft_reset(pdata)) { 1469 SMSC_WARN(pdata, hw, "soft reset failed"); 1470 return -EIO; 1471 } 1472 1473 smsc911x_reg_write(pdata, HW_CFG, 0x00050000); 1474 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); 1475 1476 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ 1477 spin_lock_irq(&pdata->mac_lock); 1478 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); 1479 spin_unlock_irq(&pdata->mac_lock); 1480 1481 /* Make sure EEPROM has finished loading before setting GPIO_CFG */ 1482 timeout = 50; 1483 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && 1484 --timeout) { 1485 udelay(10); 1486 } 1487 1488 if (unlikely(timeout == 0)) 1489 SMSC_WARN(pdata, ifup, 1490 "Timed out waiting for EEPROM busy bit to clear"); 1491 1492 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000); 1493 1494 /* The soft reset above cleared the device's MAC address, 1495 * restore it from local copy (set in probe) */ 1496 spin_lock_irq(&pdata->mac_lock); 1497 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1498 spin_unlock_irq(&pdata->mac_lock); 1499 1500 /* Initialise irqs, but leave all sources disabled */ 1501 smsc911x_reg_write(pdata, INT_EN, 0); 1502 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 1503 1504 /* Set interrupt deassertion to 100uS */ 1505 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_); 1506 1507 if (pdata->config.irq_polarity) { 1508 SMSC_TRACE(pdata, ifup, "irq polarity: active high"); 1509 intcfg |= INT_CFG_IRQ_POL_; 1510 } else { 1511 SMSC_TRACE(pdata, ifup, "irq polarity: active low"); 1512 } 1513 1514 if (pdata->config.irq_type) { 1515 SMSC_TRACE(pdata, ifup, "irq type: push-pull"); 1516 intcfg |= INT_CFG_IRQ_TYPE_; 1517 } else { 1518 SMSC_TRACE(pdata, ifup, "irq type: open drain"); 1519 } 1520 1521 smsc911x_reg_write(pdata, INT_CFG, intcfg); 1522 1523 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq); 1524 pdata->software_irq_signal = 0; 1525 smp_wmb(); 1526 1527 temp = smsc911x_reg_read(pdata, INT_EN); 1528 temp |= INT_EN_SW_INT_EN_; 1529 smsc911x_reg_write(pdata, INT_EN, temp); 1530 1531 timeout = 1000; 1532 while (timeout--) { 1533 if (pdata->software_irq_signal) 1534 break; 1535 msleep(1); 1536 } 1537 1538 if (!pdata->software_irq_signal) { 1539 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n", 1540 dev->irq); 1541 return -ENODEV; 1542 } 1543 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d", 1544 dev->irq); 1545 1546 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n", 1547 (unsigned long)pdata->ioaddr, dev->irq); 1548 1549 /* Reset the last known duplex and carrier */ 1550 pdata->last_duplex = -1; 1551 pdata->last_carrier = -1; 1552 1553 /* Bring the PHY up */ 1554 phy_start(pdata->phy_dev); 1555 1556 temp = smsc911x_reg_read(pdata, HW_CFG); 1557 /* Preserve TX FIFO size and external PHY configuration */ 1558 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF); 1559 temp |= HW_CFG_SF_; 1560 smsc911x_reg_write(pdata, HW_CFG, temp); 1561 1562 temp = smsc911x_reg_read(pdata, FIFO_INT); 1563 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1564 temp &= ~(FIFO_INT_RX_STS_LEVEL_); 1565 smsc911x_reg_write(pdata, FIFO_INT, temp); 1566 1567 /* set RX Data offset to 2 bytes for alignment */ 1568 smsc911x_reg_write(pdata, RX_CFG, (2 << 8)); 1569 1570 /* enable NAPI polling before enabling RX interrupts */ 1571 napi_enable(&pdata->napi); 1572 1573 temp = smsc911x_reg_read(pdata, INT_EN); 1574 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_); 1575 smsc911x_reg_write(pdata, INT_EN, temp); 1576 1577 spin_lock_irq(&pdata->mac_lock); 1578 temp = smsc911x_mac_read(pdata, MAC_CR); 1579 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_); 1580 smsc911x_mac_write(pdata, MAC_CR, temp); 1581 spin_unlock_irq(&pdata->mac_lock); 1582 1583 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 1584 1585 netif_start_queue(dev); 1586 return 0; 1587 } 1588 1589 /* Entry point for stopping the interface */ 1590 static int smsc911x_stop(struct net_device *dev) 1591 { 1592 struct smsc911x_data *pdata = netdev_priv(dev); 1593 unsigned int temp; 1594 1595 /* Disable all device interrupts */ 1596 temp = smsc911x_reg_read(pdata, INT_CFG); 1597 temp &= ~INT_CFG_IRQ_EN_; 1598 smsc911x_reg_write(pdata, INT_CFG, temp); 1599 1600 /* Stop Tx and Rx polling */ 1601 netif_stop_queue(dev); 1602 napi_disable(&pdata->napi); 1603 1604 /* At this point all Rx and Tx activity is stopped */ 1605 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1606 smsc911x_tx_update_txcounters(dev); 1607 1608 /* Bring the PHY down */ 1609 if (pdata->phy_dev) 1610 phy_stop(pdata->phy_dev); 1611 1612 SMSC_TRACE(pdata, ifdown, "Interface stopped"); 1613 return 0; 1614 } 1615 1616 /* Entry point for transmitting a packet */ 1617 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 1618 { 1619 struct smsc911x_data *pdata = netdev_priv(dev); 1620 unsigned int freespace; 1621 unsigned int tx_cmd_a; 1622 unsigned int tx_cmd_b; 1623 unsigned int temp; 1624 u32 wrsz; 1625 ulong bufp; 1626 1627 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_; 1628 1629 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD)) 1630 SMSC_WARN(pdata, tx_err, 1631 "Tx data fifo low, space available: %d", freespace); 1632 1633 /* Word alignment adjustment */ 1634 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16; 1635 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1636 tx_cmd_a |= (unsigned int)skb->len; 1637 1638 tx_cmd_b = ((unsigned int)skb->len) << 16; 1639 tx_cmd_b |= (unsigned int)skb->len; 1640 1641 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a); 1642 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b); 1643 1644 bufp = (ulong)skb->data & (~0x3); 1645 wrsz = (u32)skb->len + 3; 1646 wrsz += (u32)((ulong)skb->data & 0x3); 1647 wrsz >>= 2; 1648 1649 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 1650 freespace -= (skb->len + 32); 1651 skb_tx_timestamp(skb); 1652 dev_kfree_skb(skb); 1653 1654 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30)) 1655 smsc911x_tx_update_txcounters(dev); 1656 1657 if (freespace < TX_FIFO_LOW_THRESHOLD) { 1658 netif_stop_queue(dev); 1659 temp = smsc911x_reg_read(pdata, FIFO_INT); 1660 temp &= 0x00FFFFFF; 1661 temp |= 0x32000000; 1662 smsc911x_reg_write(pdata, FIFO_INT, temp); 1663 } 1664 1665 return NETDEV_TX_OK; 1666 } 1667 1668 /* Entry point for getting status counters */ 1669 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev) 1670 { 1671 struct smsc911x_data *pdata = netdev_priv(dev); 1672 smsc911x_tx_update_txcounters(dev); 1673 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1674 return &dev->stats; 1675 } 1676 1677 /* Entry point for setting addressing modes */ 1678 static void smsc911x_set_multicast_list(struct net_device *dev) 1679 { 1680 struct smsc911x_data *pdata = netdev_priv(dev); 1681 unsigned long flags; 1682 1683 if (dev->flags & IFF_PROMISC) { 1684 /* Enabling promiscuous mode */ 1685 pdata->set_bits_mask = MAC_CR_PRMS_; 1686 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1687 pdata->hashhi = 0; 1688 pdata->hashlo = 0; 1689 } else if (dev->flags & IFF_ALLMULTI) { 1690 /* Enabling all multicast mode */ 1691 pdata->set_bits_mask = MAC_CR_MCPAS_; 1692 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_); 1693 pdata->hashhi = 0; 1694 pdata->hashlo = 0; 1695 } else if (!netdev_mc_empty(dev)) { 1696 /* Enabling specific multicast addresses */ 1697 unsigned int hash_high = 0; 1698 unsigned int hash_low = 0; 1699 struct netdev_hw_addr *ha; 1700 1701 pdata->set_bits_mask = MAC_CR_HPFILT_; 1702 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_); 1703 1704 netdev_for_each_mc_addr(ha, dev) { 1705 unsigned int bitnum = smsc911x_hash(ha->addr); 1706 unsigned int mask = 0x01 << (bitnum & 0x1F); 1707 1708 if (bitnum & 0x20) 1709 hash_high |= mask; 1710 else 1711 hash_low |= mask; 1712 } 1713 1714 pdata->hashhi = hash_high; 1715 pdata->hashlo = hash_low; 1716 } else { 1717 /* Enabling local MAC address only */ 1718 pdata->set_bits_mask = 0; 1719 pdata->clear_bits_mask = 1720 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1721 pdata->hashhi = 0; 1722 pdata->hashlo = 0; 1723 } 1724 1725 spin_lock_irqsave(&pdata->mac_lock, flags); 1726 1727 if (pdata->generation <= 1) { 1728 /* Older hardware revision - cannot change these flags while 1729 * receiving data */ 1730 if (!pdata->multicast_update_pending) { 1731 unsigned int temp; 1732 SMSC_TRACE(pdata, hw, "scheduling mcast update"); 1733 pdata->multicast_update_pending = 1; 1734 1735 /* Request the hardware to stop, then perform the 1736 * update when we get an RX_STOP interrupt */ 1737 temp = smsc911x_mac_read(pdata, MAC_CR); 1738 temp &= ~(MAC_CR_RXEN_); 1739 smsc911x_mac_write(pdata, MAC_CR, temp); 1740 } else { 1741 /* There is another update pending, this should now 1742 * use the newer values */ 1743 } 1744 } else { 1745 /* Newer hardware revision - can write immediately */ 1746 smsc911x_rx_multicast_update(pdata); 1747 } 1748 1749 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1750 } 1751 1752 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id) 1753 { 1754 struct net_device *dev = dev_id; 1755 struct smsc911x_data *pdata = netdev_priv(dev); 1756 u32 intsts = smsc911x_reg_read(pdata, INT_STS); 1757 u32 inten = smsc911x_reg_read(pdata, INT_EN); 1758 int serviced = IRQ_NONE; 1759 u32 temp; 1760 1761 if (unlikely(intsts & inten & INT_STS_SW_INT_)) { 1762 temp = smsc911x_reg_read(pdata, INT_EN); 1763 temp &= (~INT_EN_SW_INT_EN_); 1764 smsc911x_reg_write(pdata, INT_EN, temp); 1765 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_); 1766 pdata->software_irq_signal = 1; 1767 smp_wmb(); 1768 serviced = IRQ_HANDLED; 1769 } 1770 1771 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) { 1772 /* Called when there is a multicast update scheduled and 1773 * it is now safe to complete the update */ 1774 SMSC_TRACE(pdata, intr, "RX Stop interrupt"); 1775 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_); 1776 if (pdata->multicast_update_pending) 1777 smsc911x_rx_multicast_update_workaround(pdata); 1778 serviced = IRQ_HANDLED; 1779 } 1780 1781 if (intsts & inten & INT_STS_TDFA_) { 1782 temp = smsc911x_reg_read(pdata, FIFO_INT); 1783 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1784 smsc911x_reg_write(pdata, FIFO_INT, temp); 1785 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_); 1786 netif_wake_queue(dev); 1787 serviced = IRQ_HANDLED; 1788 } 1789 1790 if (unlikely(intsts & inten & INT_STS_RXE_)) { 1791 SMSC_TRACE(pdata, intr, "RX Error interrupt"); 1792 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_); 1793 serviced = IRQ_HANDLED; 1794 } 1795 1796 if (likely(intsts & inten & INT_STS_RSFL_)) { 1797 if (likely(napi_schedule_prep(&pdata->napi))) { 1798 /* Disable Rx interrupts */ 1799 temp = smsc911x_reg_read(pdata, INT_EN); 1800 temp &= (~INT_EN_RSFL_EN_); 1801 smsc911x_reg_write(pdata, INT_EN, temp); 1802 /* Schedule a NAPI poll */ 1803 __napi_schedule(&pdata->napi); 1804 } else { 1805 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed"); 1806 } 1807 serviced = IRQ_HANDLED; 1808 } 1809 1810 return serviced; 1811 } 1812 1813 #ifdef CONFIG_NET_POLL_CONTROLLER 1814 static void smsc911x_poll_controller(struct net_device *dev) 1815 { 1816 disable_irq(dev->irq); 1817 smsc911x_irqhandler(0, dev); 1818 enable_irq(dev->irq); 1819 } 1820 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1821 1822 static int smsc911x_set_mac_address(struct net_device *dev, void *p) 1823 { 1824 struct smsc911x_data *pdata = netdev_priv(dev); 1825 struct sockaddr *addr = p; 1826 1827 /* On older hardware revisions we cannot change the mac address 1828 * registers while receiving data. Newer devices can safely change 1829 * this at any time. */ 1830 if (pdata->generation <= 1 && netif_running(dev)) 1831 return -EBUSY; 1832 1833 if (!is_valid_ether_addr(addr->sa_data)) 1834 return -EADDRNOTAVAIL; 1835 1836 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 1837 1838 spin_lock_irq(&pdata->mac_lock); 1839 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1840 spin_unlock_irq(&pdata->mac_lock); 1841 1842 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 1843 1844 return 0; 1845 } 1846 1847 /* Standard ioctls for mii-tool */ 1848 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1849 { 1850 struct smsc911x_data *pdata = netdev_priv(dev); 1851 1852 if (!netif_running(dev) || !pdata->phy_dev) 1853 return -EINVAL; 1854 1855 return phy_mii_ioctl(pdata->phy_dev, ifr, cmd); 1856 } 1857 1858 static int 1859 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) 1860 { 1861 struct smsc911x_data *pdata = netdev_priv(dev); 1862 1863 cmd->maxtxpkt = 1; 1864 cmd->maxrxpkt = 1; 1865 return phy_ethtool_gset(pdata->phy_dev, cmd); 1866 } 1867 1868 static int 1869 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) 1870 { 1871 struct smsc911x_data *pdata = netdev_priv(dev); 1872 1873 return phy_ethtool_sset(pdata->phy_dev, cmd); 1874 } 1875 1876 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev, 1877 struct ethtool_drvinfo *info) 1878 { 1879 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver)); 1880 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version)); 1881 strlcpy(info->bus_info, dev_name(dev->dev.parent), 1882 sizeof(info->bus_info)); 1883 } 1884 1885 static int smsc911x_ethtool_nwayreset(struct net_device *dev) 1886 { 1887 struct smsc911x_data *pdata = netdev_priv(dev); 1888 1889 return phy_start_aneg(pdata->phy_dev); 1890 } 1891 1892 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev) 1893 { 1894 struct smsc911x_data *pdata = netdev_priv(dev); 1895 return pdata->msg_enable; 1896 } 1897 1898 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level) 1899 { 1900 struct smsc911x_data *pdata = netdev_priv(dev); 1901 pdata->msg_enable = level; 1902 } 1903 1904 static int smsc911x_ethtool_getregslen(struct net_device *dev) 1905 { 1906 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) * 1907 sizeof(u32); 1908 } 1909 1910 static void 1911 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, 1912 void *buf) 1913 { 1914 struct smsc911x_data *pdata = netdev_priv(dev); 1915 struct phy_device *phy_dev = pdata->phy_dev; 1916 unsigned long flags; 1917 unsigned int i; 1918 unsigned int j = 0; 1919 u32 *data = buf; 1920 1921 regs->version = pdata->idrev; 1922 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32))) 1923 data[j++] = smsc911x_reg_read(pdata, i); 1924 1925 for (i = MAC_CR; i <= WUCSR; i++) { 1926 spin_lock_irqsave(&pdata->mac_lock, flags); 1927 data[j++] = smsc911x_mac_read(pdata, i); 1928 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1929 } 1930 1931 for (i = 0; i <= 31; i++) 1932 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i); 1933 } 1934 1935 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata) 1936 { 1937 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG); 1938 temp &= ~GPIO_CFG_EEPR_EN_; 1939 smsc911x_reg_write(pdata, GPIO_CFG, temp); 1940 msleep(1); 1941 } 1942 1943 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op) 1944 { 1945 int timeout = 100; 1946 u32 e2cmd; 1947 1948 SMSC_TRACE(pdata, drv, "op 0x%08x", op); 1949 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) { 1950 SMSC_WARN(pdata, drv, "Busy at start"); 1951 return -EBUSY; 1952 } 1953 1954 e2cmd = op | E2P_CMD_EPC_BUSY_; 1955 smsc911x_reg_write(pdata, E2P_CMD, e2cmd); 1956 1957 do { 1958 msleep(1); 1959 e2cmd = smsc911x_reg_read(pdata, E2P_CMD); 1960 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); 1961 1962 if (!timeout) { 1963 SMSC_TRACE(pdata, drv, "TIMED OUT"); 1964 return -EAGAIN; 1965 } 1966 1967 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { 1968 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation"); 1969 return -EINVAL; 1970 } 1971 1972 return 0; 1973 } 1974 1975 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata, 1976 u8 address, u8 *data) 1977 { 1978 u32 op = E2P_CMD_EPC_CMD_READ_ | address; 1979 int ret; 1980 1981 SMSC_TRACE(pdata, drv, "address 0x%x", address); 1982 ret = smsc911x_eeprom_send_cmd(pdata, op); 1983 1984 if (!ret) 1985 data[address] = smsc911x_reg_read(pdata, E2P_DATA); 1986 1987 return ret; 1988 } 1989 1990 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata, 1991 u8 address, u8 data) 1992 { 1993 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; 1994 u32 temp; 1995 int ret; 1996 1997 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data); 1998 ret = smsc911x_eeprom_send_cmd(pdata, op); 1999 2000 if (!ret) { 2001 op = E2P_CMD_EPC_CMD_WRITE_ | address; 2002 smsc911x_reg_write(pdata, E2P_DATA, (u32)data); 2003 2004 /* Workaround for hardware read-after-write restriction */ 2005 temp = smsc911x_reg_read(pdata, BYTE_TEST); 2006 2007 ret = smsc911x_eeprom_send_cmd(pdata, op); 2008 } 2009 2010 return ret; 2011 } 2012 2013 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev) 2014 { 2015 return SMSC911X_EEPROM_SIZE; 2016 } 2017 2018 static int smsc911x_ethtool_get_eeprom(struct net_device *dev, 2019 struct ethtool_eeprom *eeprom, u8 *data) 2020 { 2021 struct smsc911x_data *pdata = netdev_priv(dev); 2022 u8 eeprom_data[SMSC911X_EEPROM_SIZE]; 2023 int len; 2024 int i; 2025 2026 smsc911x_eeprom_enable_access(pdata); 2027 2028 len = min(eeprom->len, SMSC911X_EEPROM_SIZE); 2029 for (i = 0; i < len; i++) { 2030 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data); 2031 if (ret < 0) { 2032 eeprom->len = 0; 2033 return ret; 2034 } 2035 } 2036 2037 memcpy(data, &eeprom_data[eeprom->offset], len); 2038 eeprom->len = len; 2039 return 0; 2040 } 2041 2042 static int smsc911x_ethtool_set_eeprom(struct net_device *dev, 2043 struct ethtool_eeprom *eeprom, u8 *data) 2044 { 2045 int ret; 2046 struct smsc911x_data *pdata = netdev_priv(dev); 2047 2048 smsc911x_eeprom_enable_access(pdata); 2049 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_); 2050 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data); 2051 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_); 2052 2053 /* Single byte write, according to man page */ 2054 eeprom->len = 1; 2055 2056 return ret; 2057 } 2058 2059 static const struct ethtool_ops smsc911x_ethtool_ops = { 2060 .get_settings = smsc911x_ethtool_getsettings, 2061 .set_settings = smsc911x_ethtool_setsettings, 2062 .get_link = ethtool_op_get_link, 2063 .get_drvinfo = smsc911x_ethtool_getdrvinfo, 2064 .nway_reset = smsc911x_ethtool_nwayreset, 2065 .get_msglevel = smsc911x_ethtool_getmsglevel, 2066 .set_msglevel = smsc911x_ethtool_setmsglevel, 2067 .get_regs_len = smsc911x_ethtool_getregslen, 2068 .get_regs = smsc911x_ethtool_getregs, 2069 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len, 2070 .get_eeprom = smsc911x_ethtool_get_eeprom, 2071 .set_eeprom = smsc911x_ethtool_set_eeprom, 2072 }; 2073 2074 static const struct net_device_ops smsc911x_netdev_ops = { 2075 .ndo_open = smsc911x_open, 2076 .ndo_stop = smsc911x_stop, 2077 .ndo_start_xmit = smsc911x_hard_start_xmit, 2078 .ndo_get_stats = smsc911x_get_stats, 2079 .ndo_set_rx_mode = smsc911x_set_multicast_list, 2080 .ndo_do_ioctl = smsc911x_do_ioctl, 2081 .ndo_change_mtu = eth_change_mtu, 2082 .ndo_validate_addr = eth_validate_addr, 2083 .ndo_set_mac_address = smsc911x_set_mac_address, 2084 #ifdef CONFIG_NET_POLL_CONTROLLER 2085 .ndo_poll_controller = smsc911x_poll_controller, 2086 #endif 2087 }; 2088 2089 /* copies the current mac address from hardware to dev->dev_addr */ 2090 static void __devinit smsc911x_read_mac_address(struct net_device *dev) 2091 { 2092 struct smsc911x_data *pdata = netdev_priv(dev); 2093 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); 2094 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); 2095 2096 dev->dev_addr[0] = (u8)(mac_low32); 2097 dev->dev_addr[1] = (u8)(mac_low32 >> 8); 2098 dev->dev_addr[2] = (u8)(mac_low32 >> 16); 2099 dev->dev_addr[3] = (u8)(mac_low32 >> 24); 2100 dev->dev_addr[4] = (u8)(mac_high16); 2101 dev->dev_addr[5] = (u8)(mac_high16 >> 8); 2102 } 2103 2104 /* Initializing private device structures, only called from probe */ 2105 static int __devinit smsc911x_init(struct net_device *dev) 2106 { 2107 struct smsc911x_data *pdata = netdev_priv(dev); 2108 unsigned int byte_test; 2109 unsigned int to = 100; 2110 2111 SMSC_TRACE(pdata, probe, "Driver Parameters:"); 2112 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX", 2113 (unsigned long)pdata->ioaddr); 2114 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq); 2115 SMSC_TRACE(pdata, probe, "PHY will be autodetected."); 2116 2117 spin_lock_init(&pdata->dev_lock); 2118 spin_lock_init(&pdata->mac_lock); 2119 2120 if (pdata->ioaddr == 0) { 2121 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000"); 2122 return -ENODEV; 2123 } 2124 2125 /* 2126 * poll the READY bit in PMT_CTRL. Any other access to the device is 2127 * forbidden while this bit isn't set. Try for 100ms 2128 */ 2129 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) 2130 udelay(1000); 2131 if (to == 0) { 2132 pr_err("Device not READY in 100ms aborting\n"); 2133 return -ENODEV; 2134 } 2135 2136 /* Check byte ordering */ 2137 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2138 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test); 2139 if (byte_test == 0x43218765) { 2140 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, " 2141 "applying WORD_SWAP"); 2142 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff); 2143 2144 /* 1 dummy read of BYTE_TEST is needed after a write to 2145 * WORD_SWAP before its contents are valid */ 2146 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2147 2148 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2149 } 2150 2151 if (byte_test != 0x87654321) { 2152 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test); 2153 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) { 2154 SMSC_WARN(pdata, probe, 2155 "top 16 bits equal to bottom 16 bits"); 2156 SMSC_TRACE(pdata, probe, 2157 "This may mean the chip is set " 2158 "for 32 bit while the bus is reading 16 bit"); 2159 } 2160 return -ENODEV; 2161 } 2162 2163 /* Default generation to zero (all workarounds apply) */ 2164 pdata->generation = 0; 2165 2166 pdata->idrev = smsc911x_reg_read(pdata, ID_REV); 2167 switch (pdata->idrev & 0xFFFF0000) { 2168 case 0x01180000: 2169 case 0x01170000: 2170 case 0x01160000: 2171 case 0x01150000: 2172 case 0x218A0000: 2173 /* LAN911[5678] family */ 2174 pdata->generation = pdata->idrev & 0x0000FFFF; 2175 break; 2176 2177 case 0x118A0000: 2178 case 0x117A0000: 2179 case 0x116A0000: 2180 case 0x115A0000: 2181 /* LAN921[5678] family */ 2182 pdata->generation = 3; 2183 break; 2184 2185 case 0x92100000: 2186 case 0x92110000: 2187 case 0x92200000: 2188 case 0x92210000: 2189 /* LAN9210/LAN9211/LAN9220/LAN9221 */ 2190 pdata->generation = 4; 2191 break; 2192 2193 default: 2194 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X", 2195 pdata->idrev); 2196 return -ENODEV; 2197 } 2198 2199 SMSC_TRACE(pdata, probe, 2200 "LAN911x identified, idrev: 0x%08X, generation: %d", 2201 pdata->idrev, pdata->generation); 2202 2203 if (pdata->generation == 0) 2204 SMSC_WARN(pdata, probe, 2205 "This driver is not intended for this chip revision"); 2206 2207 /* workaround for platforms without an eeprom, where the mac address 2208 * is stored elsewhere and set by the bootloader. This saves the 2209 * mac address before resetting the device */ 2210 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { 2211 spin_lock_irq(&pdata->mac_lock); 2212 smsc911x_read_mac_address(dev); 2213 spin_unlock_irq(&pdata->mac_lock); 2214 } 2215 2216 /* Reset the LAN911x */ 2217 if (smsc911x_soft_reset(pdata)) 2218 return -ENODEV; 2219 2220 /* Disable all interrupt sources until we bring the device up */ 2221 smsc911x_reg_write(pdata, INT_EN, 0); 2222 2223 ether_setup(dev); 2224 dev->flags |= IFF_MULTICAST; 2225 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT); 2226 dev->netdev_ops = &smsc911x_netdev_ops; 2227 dev->ethtool_ops = &smsc911x_ethtool_ops; 2228 2229 return 0; 2230 } 2231 2232 static int __devexit smsc911x_drv_remove(struct platform_device *pdev) 2233 { 2234 struct net_device *dev; 2235 struct smsc911x_data *pdata; 2236 struct resource *res; 2237 2238 dev = platform_get_drvdata(pdev); 2239 BUG_ON(!dev); 2240 pdata = netdev_priv(dev); 2241 BUG_ON(!pdata); 2242 BUG_ON(!pdata->ioaddr); 2243 BUG_ON(!pdata->phy_dev); 2244 2245 SMSC_TRACE(pdata, ifdown, "Stopping driver"); 2246 2247 phy_disconnect(pdata->phy_dev); 2248 pdata->phy_dev = NULL; 2249 mdiobus_unregister(pdata->mii_bus); 2250 mdiobus_free(pdata->mii_bus); 2251 2252 platform_set_drvdata(pdev, NULL); 2253 unregister_netdev(dev); 2254 free_irq(dev->irq, dev); 2255 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2256 "smsc911x-memory"); 2257 if (!res) 2258 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2259 2260 release_mem_region(res->start, resource_size(res)); 2261 2262 iounmap(pdata->ioaddr); 2263 2264 (void)smsc911x_disable_resources(pdev); 2265 smsc911x_free_resources(pdev); 2266 2267 free_netdev(dev); 2268 2269 return 0; 2270 } 2271 2272 /* standard register acces */ 2273 static const struct smsc911x_ops standard_smsc911x_ops = { 2274 .reg_read = __smsc911x_reg_read, 2275 .reg_write = __smsc911x_reg_write, 2276 .rx_readfifo = smsc911x_rx_readfifo, 2277 .tx_writefifo = smsc911x_tx_writefifo, 2278 }; 2279 2280 /* shifted register access */ 2281 static const struct smsc911x_ops shifted_smsc911x_ops = { 2282 .reg_read = __smsc911x_reg_read_shift, 2283 .reg_write = __smsc911x_reg_write_shift, 2284 .rx_readfifo = smsc911x_rx_readfifo_shift, 2285 .tx_writefifo = smsc911x_tx_writefifo_shift, 2286 }; 2287 2288 #ifdef CONFIG_OF 2289 static int __devinit smsc911x_probe_config_dt( 2290 struct smsc911x_platform_config *config, 2291 struct device_node *np) 2292 { 2293 const char *mac; 2294 u32 width = 0; 2295 2296 if (!np) 2297 return -ENODEV; 2298 2299 config->phy_interface = of_get_phy_mode(np); 2300 2301 mac = of_get_mac_address(np); 2302 if (mac) 2303 memcpy(config->mac, mac, ETH_ALEN); 2304 2305 of_property_read_u32(np, "reg-shift", &config->shift); 2306 2307 of_property_read_u32(np, "reg-io-width", &width); 2308 if (width == 4) 2309 config->flags |= SMSC911X_USE_32BIT; 2310 else 2311 config->flags |= SMSC911X_USE_16BIT; 2312 2313 if (of_get_property(np, "smsc,irq-active-high", NULL)) 2314 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH; 2315 2316 if (of_get_property(np, "smsc,irq-push-pull", NULL)) 2317 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL; 2318 2319 if (of_get_property(np, "smsc,force-internal-phy", NULL)) 2320 config->flags |= SMSC911X_FORCE_INTERNAL_PHY; 2321 2322 if (of_get_property(np, "smsc,force-external-phy", NULL)) 2323 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY; 2324 2325 if (of_get_property(np, "smsc,save-mac-address", NULL)) 2326 config->flags |= SMSC911X_SAVE_MAC_ADDRESS; 2327 2328 return 0; 2329 } 2330 #else 2331 static inline int smsc911x_probe_config_dt( 2332 struct smsc911x_platform_config *config, 2333 struct device_node *np) 2334 { 2335 return -ENODEV; 2336 } 2337 #endif /* CONFIG_OF */ 2338 2339 static int __devinit smsc911x_drv_probe(struct platform_device *pdev) 2340 { 2341 struct device_node *np = pdev->dev.of_node; 2342 struct net_device *dev; 2343 struct smsc911x_data *pdata; 2344 struct smsc911x_platform_config *config = pdev->dev.platform_data; 2345 struct resource *res, *irq_res; 2346 unsigned int intcfg = 0; 2347 int res_size, irq_flags; 2348 int retval; 2349 2350 pr_info("Driver version %s\n", SMSC_DRV_VERSION); 2351 2352 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2353 "smsc911x-memory"); 2354 if (!res) 2355 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2356 if (!res) { 2357 pr_warn("Could not allocate resource\n"); 2358 retval = -ENODEV; 2359 goto out_0; 2360 } 2361 res_size = resource_size(res); 2362 2363 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 2364 if (!irq_res) { 2365 pr_warn("Could not allocate irq resource\n"); 2366 retval = -ENODEV; 2367 goto out_0; 2368 } 2369 2370 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) { 2371 retval = -EBUSY; 2372 goto out_0; 2373 } 2374 2375 dev = alloc_etherdev(sizeof(struct smsc911x_data)); 2376 if (!dev) { 2377 pr_warn("Could not allocate device\n"); 2378 retval = -ENOMEM; 2379 goto out_release_io_1; 2380 } 2381 2382 SET_NETDEV_DEV(dev, &pdev->dev); 2383 2384 pdata = netdev_priv(dev); 2385 2386 dev->irq = irq_res->start; 2387 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK; 2388 pdata->ioaddr = ioremap_nocache(res->start, res_size); 2389 2390 pdata->dev = dev; 2391 pdata->msg_enable = ((1 << debug) - 1); 2392 2393 platform_set_drvdata(pdev, dev); 2394 2395 retval = smsc911x_request_resources(pdev); 2396 if (retval) 2397 goto out_return_resources; 2398 2399 retval = smsc911x_enable_resources(pdev); 2400 if (retval) 2401 goto out_disable_resources; 2402 2403 if (pdata->ioaddr == NULL) { 2404 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid"); 2405 retval = -ENOMEM; 2406 goto out_disable_resources; 2407 } 2408 2409 retval = smsc911x_probe_config_dt(&pdata->config, np); 2410 if (retval && config) { 2411 /* copy config parameters across to pdata */ 2412 memcpy(&pdata->config, config, sizeof(pdata->config)); 2413 retval = 0; 2414 } 2415 2416 if (retval) { 2417 SMSC_WARN(pdata, probe, "Error smsc911x config not found"); 2418 goto out_disable_resources; 2419 } 2420 2421 /* assume standard, non-shifted, access to HW registers */ 2422 pdata->ops = &standard_smsc911x_ops; 2423 /* apply the right access if shifting is needed */ 2424 if (pdata->config.shift) 2425 pdata->ops = &shifted_smsc911x_ops; 2426 2427 retval = smsc911x_init(dev); 2428 if (retval < 0) 2429 goto out_disable_resources; 2430 2431 /* configure irq polarity and type before connecting isr */ 2432 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH) 2433 intcfg |= INT_CFG_IRQ_POL_; 2434 2435 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL) 2436 intcfg |= INT_CFG_IRQ_TYPE_; 2437 2438 smsc911x_reg_write(pdata, INT_CFG, intcfg); 2439 2440 /* Ensure interrupts are globally disabled before connecting ISR */ 2441 smsc911x_reg_write(pdata, INT_EN, 0); 2442 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 2443 2444 retval = request_irq(dev->irq, smsc911x_irqhandler, 2445 irq_flags | IRQF_SHARED, dev->name, dev); 2446 if (retval) { 2447 SMSC_WARN(pdata, probe, 2448 "Unable to claim requested irq: %d", dev->irq); 2449 goto out_free_irq; 2450 } 2451 2452 retval = register_netdev(dev); 2453 if (retval) { 2454 SMSC_WARN(pdata, probe, "Error %i registering device", retval); 2455 goto out_free_irq; 2456 } else { 2457 SMSC_TRACE(pdata, probe, 2458 "Network interface: \"%s\"", dev->name); 2459 } 2460 2461 retval = smsc911x_mii_init(pdev, dev); 2462 if (retval) { 2463 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval); 2464 goto out_unregister_netdev_5; 2465 } 2466 2467 spin_lock_irq(&pdata->mac_lock); 2468 2469 /* Check if mac address has been specified when bringing interface up */ 2470 if (is_valid_ether_addr(dev->dev_addr)) { 2471 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2472 SMSC_TRACE(pdata, probe, 2473 "MAC Address is specified by configuration"); 2474 } else if (is_valid_ether_addr(pdata->config.mac)) { 2475 memcpy(dev->dev_addr, pdata->config.mac, 6); 2476 SMSC_TRACE(pdata, probe, 2477 "MAC Address specified by platform data"); 2478 } else { 2479 /* Try reading mac address from device. if EEPROM is present 2480 * it will already have been set */ 2481 smsc_get_mac(dev); 2482 2483 if (is_valid_ether_addr(dev->dev_addr)) { 2484 /* eeprom values are valid so use them */ 2485 SMSC_TRACE(pdata, probe, 2486 "Mac Address is read from LAN911x EEPROM"); 2487 } else { 2488 /* eeprom values are invalid, generate random MAC */ 2489 random_ether_addr(dev->dev_addr); 2490 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2491 SMSC_TRACE(pdata, probe, 2492 "MAC Address is set to random_ether_addr"); 2493 } 2494 } 2495 2496 spin_unlock_irq(&pdata->mac_lock); 2497 2498 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 2499 2500 return 0; 2501 2502 out_unregister_netdev_5: 2503 unregister_netdev(dev); 2504 out_free_irq: 2505 free_irq(dev->irq, dev); 2506 out_disable_resources: 2507 (void)smsc911x_disable_resources(pdev); 2508 out_return_resources: 2509 smsc911x_free_resources(pdev); 2510 platform_set_drvdata(pdev, NULL); 2511 iounmap(pdata->ioaddr); 2512 free_netdev(dev); 2513 out_release_io_1: 2514 release_mem_region(res->start, resource_size(res)); 2515 out_0: 2516 return retval; 2517 } 2518 2519 #ifdef CONFIG_PM 2520 /* This implementation assumes the devices remains powered on its VDDVARIO 2521 * pins during suspend. */ 2522 2523 /* TODO: implement freeze/thaw callbacks for hibernation.*/ 2524 2525 static int smsc911x_suspend(struct device *dev) 2526 { 2527 struct net_device *ndev = dev_get_drvdata(dev); 2528 struct smsc911x_data *pdata = netdev_priv(ndev); 2529 2530 /* enable wake on LAN, energy detection and the external PME 2531 * signal. */ 2532 smsc911x_reg_write(pdata, PMT_CTRL, 2533 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ | 2534 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_); 2535 2536 return 0; 2537 } 2538 2539 static int smsc911x_resume(struct device *dev) 2540 { 2541 struct net_device *ndev = dev_get_drvdata(dev); 2542 struct smsc911x_data *pdata = netdev_priv(ndev); 2543 unsigned int to = 100; 2544 2545 /* Note 3.11 from the datasheet: 2546 * "When the LAN9220 is in a power saving state, a write of any 2547 * data to the BYTE_TEST register will wake-up the device." 2548 */ 2549 smsc911x_reg_write(pdata, BYTE_TEST, 0); 2550 2551 /* poll the READY bit in PMT_CTRL. Any other access to the device is 2552 * forbidden while this bit isn't set. Try for 100ms and return -EIO 2553 * if it failed. */ 2554 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) 2555 udelay(1000); 2556 2557 return (to == 0) ? -EIO : 0; 2558 } 2559 2560 static const struct dev_pm_ops smsc911x_pm_ops = { 2561 .suspend = smsc911x_suspend, 2562 .resume = smsc911x_resume, 2563 }; 2564 2565 #define SMSC911X_PM_OPS (&smsc911x_pm_ops) 2566 2567 #else 2568 #define SMSC911X_PM_OPS NULL 2569 #endif 2570 2571 static const struct of_device_id smsc911x_dt_ids[] = { 2572 { .compatible = "smsc,lan9115", }, 2573 { /* sentinel */ } 2574 }; 2575 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids); 2576 2577 static struct platform_driver smsc911x_driver = { 2578 .probe = smsc911x_drv_probe, 2579 .remove = __devexit_p(smsc911x_drv_remove), 2580 .driver = { 2581 .name = SMSC_CHIPNAME, 2582 .owner = THIS_MODULE, 2583 .pm = SMSC911X_PM_OPS, 2584 .of_match_table = smsc911x_dt_ids, 2585 }, 2586 }; 2587 2588 /* Entry point for loading the module */ 2589 static int __init smsc911x_init_module(void) 2590 { 2591 SMSC_INITIALIZE(); 2592 return platform_driver_register(&smsc911x_driver); 2593 } 2594 2595 /* entry point for unloading the module */ 2596 static void __exit smsc911x_cleanup_module(void) 2597 { 2598 platform_driver_unregister(&smsc911x_driver); 2599 } 2600 2601 module_init(smsc911x_init_module); 2602 module_exit(smsc911x_cleanup_module); 2603