1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*************************************************************************** 3 * 4 * Copyright (C) 2004-2008 SMSC 5 * Copyright (C) 2005-2008 ARM 6 * 7 *************************************************************************** 8 * Rewritten, heavily based on smsc911x simple driver by SMSC. 9 * Partly uses io macros from smc91x.c by Nicolas Pitre 10 * 11 * Supported devices: 12 * LAN9115, LAN9116, LAN9117, LAN9118 13 * LAN9215, LAN9216, LAN9217, LAN9218 14 * LAN9210, LAN9211 15 * LAN9220, LAN9221 16 * LAN89218,LAN9250 17 */ 18 19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 20 21 #include <linux/crc32.h> 22 #include <linux/clk.h> 23 #include <linux/delay.h> 24 #include <linux/errno.h> 25 #include <linux/etherdevice.h> 26 #include <linux/ethtool.h> 27 #include <linux/init.h> 28 #include <linux/interrupt.h> 29 #include <linux/ioport.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/netdevice.h> 33 #include <linux/platform_device.h> 34 #include <linux/regulator/consumer.h> 35 #include <linux/sched.h> 36 #include <linux/timer.h> 37 #include <linux/bug.h> 38 #include <linux/bitops.h> 39 #include <linux/irq.h> 40 #include <linux/io.h> 41 #include <linux/swab.h> 42 #include <linux/phy.h> 43 #include <linux/smsc911x.h> 44 #include <linux/device.h> 45 #include <linux/of.h> 46 #include <linux/of_device.h> 47 #include <linux/of_gpio.h> 48 #include <linux/of_net.h> 49 #include <linux/acpi.h> 50 #include <linux/pm_runtime.h> 51 #include <linux/property.h> 52 #include <linux/gpio/consumer.h> 53 54 #include "smsc911x.h" 55 56 #define SMSC_CHIPNAME "smsc911x" 57 #define SMSC_MDIONAME "smsc911x-mdio" 58 #define SMSC_DRV_VERSION "2008-10-21" 59 60 MODULE_LICENSE("GPL"); 61 MODULE_VERSION(SMSC_DRV_VERSION); 62 MODULE_ALIAS("platform:smsc911x"); 63 64 #if USE_DEBUG > 0 65 static int debug = 16; 66 #else 67 static int debug = 3; 68 #endif 69 70 module_param(debug, int, 0); 71 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 72 73 struct smsc911x_data; 74 75 struct smsc911x_ops { 76 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg); 77 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val); 78 void (*rx_readfifo)(struct smsc911x_data *pdata, 79 unsigned int *buf, unsigned int wordcount); 80 void (*tx_writefifo)(struct smsc911x_data *pdata, 81 unsigned int *buf, unsigned int wordcount); 82 }; 83 84 #define SMSC911X_NUM_SUPPLIES 2 85 86 struct smsc911x_data { 87 void __iomem *ioaddr; 88 89 unsigned int idrev; 90 91 /* used to decide which workarounds apply */ 92 unsigned int generation; 93 94 /* device configuration (copied from platform_data during probe) */ 95 struct smsc911x_platform_config config; 96 97 /* This needs to be acquired before calling any of below: 98 * smsc911x_mac_read(), smsc911x_mac_write() 99 */ 100 spinlock_t mac_lock; 101 102 /* spinlock to ensure register accesses are serialised */ 103 spinlock_t dev_lock; 104 105 struct mii_bus *mii_bus; 106 unsigned int using_extphy; 107 int last_duplex; 108 int last_carrier; 109 110 u32 msg_enable; 111 unsigned int gpio_setting; 112 unsigned int gpio_orig_setting; 113 struct net_device *dev; 114 struct napi_struct napi; 115 116 unsigned int software_irq_signal; 117 118 #ifdef USE_PHY_WORK_AROUND 119 #define MIN_PACKET_SIZE (64) 120 char loopback_tx_pkt[MIN_PACKET_SIZE]; 121 char loopback_rx_pkt[MIN_PACKET_SIZE]; 122 unsigned int resetcount; 123 #endif 124 125 /* Members for Multicast filter workaround */ 126 unsigned int multicast_update_pending; 127 unsigned int set_bits_mask; 128 unsigned int clear_bits_mask; 129 unsigned int hashhi; 130 unsigned int hashlo; 131 132 /* register access functions */ 133 const struct smsc911x_ops *ops; 134 135 /* regulators */ 136 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES]; 137 138 /* Reset GPIO */ 139 struct gpio_desc *reset_gpiod; 140 141 /* clock */ 142 struct clk *clk; 143 }; 144 145 /* Easy access to information */ 146 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift)) 147 148 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 149 { 150 if (pdata->config.flags & SMSC911X_USE_32BIT) 151 return readl(pdata->ioaddr + reg); 152 153 if (pdata->config.flags & SMSC911X_USE_16BIT) 154 return ((readw(pdata->ioaddr + reg) & 0xFFFF) | 155 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16)); 156 157 BUG(); 158 return 0; 159 } 160 161 static inline u32 162 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg) 163 { 164 if (pdata->config.flags & SMSC911X_USE_32BIT) 165 return readl(pdata->ioaddr + __smsc_shift(pdata, reg)); 166 167 if (pdata->config.flags & SMSC911X_USE_16BIT) 168 return (readw(pdata->ioaddr + 169 __smsc_shift(pdata, reg)) & 0xFFFF) | 170 ((readw(pdata->ioaddr + 171 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16); 172 173 BUG(); 174 return 0; 175 } 176 177 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 178 { 179 u32 data; 180 unsigned long flags; 181 182 spin_lock_irqsave(&pdata->dev_lock, flags); 183 data = pdata->ops->reg_read(pdata, reg); 184 spin_unlock_irqrestore(&pdata->dev_lock, flags); 185 186 return data; 187 } 188 189 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 190 u32 val) 191 { 192 if (pdata->config.flags & SMSC911X_USE_32BIT) { 193 writel(val, pdata->ioaddr + reg); 194 return; 195 } 196 197 if (pdata->config.flags & SMSC911X_USE_16BIT) { 198 writew(val & 0xFFFF, pdata->ioaddr + reg); 199 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2); 200 return; 201 } 202 203 BUG(); 204 } 205 206 static inline void 207 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val) 208 { 209 if (pdata->config.flags & SMSC911X_USE_32BIT) { 210 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg)); 211 return; 212 } 213 214 if (pdata->config.flags & SMSC911X_USE_16BIT) { 215 writew(val & 0xFFFF, 216 pdata->ioaddr + __smsc_shift(pdata, reg)); 217 writew((val >> 16) & 0xFFFF, 218 pdata->ioaddr + __smsc_shift(pdata, reg + 2)); 219 return; 220 } 221 222 BUG(); 223 } 224 225 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 226 u32 val) 227 { 228 unsigned long flags; 229 230 spin_lock_irqsave(&pdata->dev_lock, flags); 231 pdata->ops->reg_write(pdata, reg, val); 232 spin_unlock_irqrestore(&pdata->dev_lock, flags); 233 } 234 235 /* Writes a packet to the TX_DATA_FIFO */ 236 static inline void 237 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf, 238 unsigned int wordcount) 239 { 240 unsigned long flags; 241 242 spin_lock_irqsave(&pdata->dev_lock, flags); 243 244 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 245 while (wordcount--) 246 __smsc911x_reg_write(pdata, TX_DATA_FIFO, 247 swab32(*buf++)); 248 goto out; 249 } 250 251 if (pdata->config.flags & SMSC911X_USE_32BIT) { 252 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount); 253 goto out; 254 } 255 256 if (pdata->config.flags & SMSC911X_USE_16BIT) { 257 while (wordcount--) 258 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++); 259 goto out; 260 } 261 262 BUG(); 263 out: 264 spin_unlock_irqrestore(&pdata->dev_lock, flags); 265 } 266 267 /* Writes a packet to the TX_DATA_FIFO - shifted version */ 268 static inline void 269 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 270 unsigned int wordcount) 271 { 272 unsigned long flags; 273 274 spin_lock_irqsave(&pdata->dev_lock, flags); 275 276 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 277 while (wordcount--) 278 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO, 279 swab32(*buf++)); 280 goto out; 281 } 282 283 if (pdata->config.flags & SMSC911X_USE_32BIT) { 284 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata, 285 TX_DATA_FIFO), buf, wordcount); 286 goto out; 287 } 288 289 if (pdata->config.flags & SMSC911X_USE_16BIT) { 290 while (wordcount--) 291 __smsc911x_reg_write_shift(pdata, 292 TX_DATA_FIFO, *buf++); 293 goto out; 294 } 295 296 BUG(); 297 out: 298 spin_unlock_irqrestore(&pdata->dev_lock, flags); 299 } 300 301 /* Reads a packet out of the RX_DATA_FIFO */ 302 static inline void 303 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf, 304 unsigned int wordcount) 305 { 306 unsigned long flags; 307 308 spin_lock_irqsave(&pdata->dev_lock, flags); 309 310 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 311 while (wordcount--) 312 *buf++ = swab32(__smsc911x_reg_read(pdata, 313 RX_DATA_FIFO)); 314 goto out; 315 } 316 317 if (pdata->config.flags & SMSC911X_USE_32BIT) { 318 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount); 319 goto out; 320 } 321 322 if (pdata->config.flags & SMSC911X_USE_16BIT) { 323 while (wordcount--) 324 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO); 325 goto out; 326 } 327 328 BUG(); 329 out: 330 spin_unlock_irqrestore(&pdata->dev_lock, flags); 331 } 332 333 /* Reads a packet out of the RX_DATA_FIFO - shifted version */ 334 static inline void 335 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 336 unsigned int wordcount) 337 { 338 unsigned long flags; 339 340 spin_lock_irqsave(&pdata->dev_lock, flags); 341 342 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 343 while (wordcount--) 344 *buf++ = swab32(__smsc911x_reg_read_shift(pdata, 345 RX_DATA_FIFO)); 346 goto out; 347 } 348 349 if (pdata->config.flags & SMSC911X_USE_32BIT) { 350 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata, 351 RX_DATA_FIFO), buf, wordcount); 352 goto out; 353 } 354 355 if (pdata->config.flags & SMSC911X_USE_16BIT) { 356 while (wordcount--) 357 *buf++ = __smsc911x_reg_read_shift(pdata, 358 RX_DATA_FIFO); 359 goto out; 360 } 361 362 BUG(); 363 out: 364 spin_unlock_irqrestore(&pdata->dev_lock, flags); 365 } 366 367 /* 368 * enable regulator and clock resources. 369 */ 370 static int smsc911x_enable_resources(struct platform_device *pdev) 371 { 372 struct net_device *ndev = platform_get_drvdata(pdev); 373 struct smsc911x_data *pdata = netdev_priv(ndev); 374 int ret = 0; 375 376 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies), 377 pdata->supplies); 378 if (ret) 379 netdev_err(ndev, "failed to enable regulators %d\n", 380 ret); 381 382 if (!IS_ERR(pdata->clk)) { 383 ret = clk_prepare_enable(pdata->clk); 384 if (ret < 0) 385 netdev_err(ndev, "failed to enable clock %d\n", ret); 386 } 387 388 return ret; 389 } 390 391 /* 392 * disable resources, currently just regulators. 393 */ 394 static int smsc911x_disable_resources(struct platform_device *pdev) 395 { 396 struct net_device *ndev = platform_get_drvdata(pdev); 397 struct smsc911x_data *pdata = netdev_priv(ndev); 398 int ret = 0; 399 400 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies), 401 pdata->supplies); 402 403 if (!IS_ERR(pdata->clk)) 404 clk_disable_unprepare(pdata->clk); 405 406 return ret; 407 } 408 409 /* 410 * Request resources, currently just regulators. 411 * 412 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where 413 * these are not always-on we need to request regulators to be turned on 414 * before we can try to access the device registers. 415 */ 416 static int smsc911x_request_resources(struct platform_device *pdev) 417 { 418 struct net_device *ndev = platform_get_drvdata(pdev); 419 struct smsc911x_data *pdata = netdev_priv(ndev); 420 int ret = 0; 421 422 /* Request regulators */ 423 pdata->supplies[0].supply = "vdd33a"; 424 pdata->supplies[1].supply = "vddvario"; 425 ret = regulator_bulk_get(&pdev->dev, 426 ARRAY_SIZE(pdata->supplies), 427 pdata->supplies); 428 if (ret) { 429 /* 430 * Retry on deferrals, else just report the error 431 * and try to continue. 432 */ 433 if (ret == -EPROBE_DEFER) 434 return ret; 435 netdev_err(ndev, "couldn't get regulators %d\n", 436 ret); 437 } 438 439 /* Request optional RESET GPIO */ 440 pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev, 441 "reset", 442 GPIOD_OUT_LOW); 443 444 /* Request clock */ 445 pdata->clk = clk_get(&pdev->dev, NULL); 446 if (IS_ERR(pdata->clk)) 447 dev_dbg(&pdev->dev, "couldn't get clock %li\n", 448 PTR_ERR(pdata->clk)); 449 450 return ret; 451 } 452 453 /* 454 * Free resources, currently just regulators. 455 * 456 */ 457 static void smsc911x_free_resources(struct platform_device *pdev) 458 { 459 struct net_device *ndev = platform_get_drvdata(pdev); 460 struct smsc911x_data *pdata = netdev_priv(ndev); 461 462 /* Free regulators */ 463 regulator_bulk_free(ARRAY_SIZE(pdata->supplies), 464 pdata->supplies); 465 466 /* Free clock */ 467 if (!IS_ERR(pdata->clk)) { 468 clk_put(pdata->clk); 469 pdata->clk = NULL; 470 } 471 } 472 473 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read 474 * and smsc911x_mac_write, so assumes mac_lock is held */ 475 static int smsc911x_mac_complete(struct smsc911x_data *pdata) 476 { 477 int i; 478 u32 val; 479 480 SMSC_ASSERT_MAC_LOCK(pdata); 481 482 for (i = 0; i < 40; i++) { 483 val = smsc911x_reg_read(pdata, MAC_CSR_CMD); 484 if (!(val & MAC_CSR_CMD_CSR_BUSY_)) 485 return 0; 486 } 487 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. " 488 "MAC_CSR_CMD: 0x%08X", val); 489 return -EIO; 490 } 491 492 /* Fetches a MAC register value. Assumes mac_lock is acquired */ 493 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset) 494 { 495 unsigned int temp; 496 497 SMSC_ASSERT_MAC_LOCK(pdata); 498 499 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 500 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 501 SMSC_WARN(pdata, hw, "MAC busy at entry"); 502 return 0xFFFFFFFF; 503 } 504 505 /* Send the MAC cmd */ 506 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 507 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_)); 508 509 /* Workaround for hardware read-after-write restriction */ 510 temp = smsc911x_reg_read(pdata, BYTE_TEST); 511 512 /* Wait for the read to complete */ 513 if (likely(smsc911x_mac_complete(pdata) == 0)) 514 return smsc911x_reg_read(pdata, MAC_CSR_DATA); 515 516 SMSC_WARN(pdata, hw, "MAC busy after read"); 517 return 0xFFFFFFFF; 518 } 519 520 /* Set a mac register, mac_lock must be acquired before calling */ 521 static void smsc911x_mac_write(struct smsc911x_data *pdata, 522 unsigned int offset, u32 val) 523 { 524 unsigned int temp; 525 526 SMSC_ASSERT_MAC_LOCK(pdata); 527 528 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 529 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 530 SMSC_WARN(pdata, hw, 531 "smsc911x_mac_write failed, MAC busy at entry"); 532 return; 533 } 534 535 /* Send data to write */ 536 smsc911x_reg_write(pdata, MAC_CSR_DATA, val); 537 538 /* Write the actual data */ 539 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 540 MAC_CSR_CMD_CSR_BUSY_)); 541 542 /* Workaround for hardware read-after-write restriction */ 543 temp = smsc911x_reg_read(pdata, BYTE_TEST); 544 545 /* Wait for the write to complete */ 546 if (likely(smsc911x_mac_complete(pdata) == 0)) 547 return; 548 549 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write"); 550 } 551 552 /* Get a phy register */ 553 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx) 554 { 555 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 556 unsigned long flags; 557 unsigned int addr; 558 int i, reg; 559 560 pm_runtime_get_sync(bus->parent); 561 spin_lock_irqsave(&pdata->mac_lock, flags); 562 563 /* Confirm MII not busy */ 564 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 565 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???"); 566 reg = -EIO; 567 goto out; 568 } 569 570 /* Set the address, index & direction (read from PHY) */ 571 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6); 572 smsc911x_mac_write(pdata, MII_ACC, addr); 573 574 /* Wait for read to complete w/ timeout */ 575 for (i = 0; i < 100; i++) 576 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 577 reg = smsc911x_mac_read(pdata, MII_DATA); 578 goto out; 579 } 580 581 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish"); 582 reg = -EIO; 583 584 out: 585 spin_unlock_irqrestore(&pdata->mac_lock, flags); 586 pm_runtime_put(bus->parent); 587 return reg; 588 } 589 590 /* Set a phy register */ 591 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx, 592 u16 val) 593 { 594 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 595 unsigned long flags; 596 unsigned int addr; 597 int i, reg; 598 599 pm_runtime_get_sync(bus->parent); 600 spin_lock_irqsave(&pdata->mac_lock, flags); 601 602 /* Confirm MII not busy */ 603 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 604 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???"); 605 reg = -EIO; 606 goto out; 607 } 608 609 /* Put the data to write in the MAC */ 610 smsc911x_mac_write(pdata, MII_DATA, val); 611 612 /* Set the address, index & direction (write to PHY) */ 613 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | 614 MII_ACC_MII_WRITE_; 615 smsc911x_mac_write(pdata, MII_ACC, addr); 616 617 /* Wait for write to complete w/ timeout */ 618 for (i = 0; i < 100; i++) 619 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 620 reg = 0; 621 goto out; 622 } 623 624 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish"); 625 reg = -EIO; 626 627 out: 628 spin_unlock_irqrestore(&pdata->mac_lock, flags); 629 pm_runtime_put(bus->parent); 630 return reg; 631 } 632 633 /* Switch to external phy. Assumes tx and rx are stopped. */ 634 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) 635 { 636 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 637 638 /* Disable phy clocks to the MAC */ 639 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 640 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; 641 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 642 udelay(10); /* Enough time for clocks to stop */ 643 644 /* Switch to external phy */ 645 hwcfg |= HW_CFG_EXT_PHY_EN_; 646 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 647 648 /* Enable phy clocks to the MAC */ 649 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 650 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; 651 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 652 udelay(10); /* Enough time for clocks to restart */ 653 654 hwcfg |= HW_CFG_SMI_SEL_; 655 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 656 } 657 658 /* Autodetects and enables external phy if present on supported chips. 659 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY 660 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ 661 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) 662 { 663 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 664 665 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { 666 SMSC_TRACE(pdata, hw, "Forcing internal PHY"); 667 pdata->using_extphy = 0; 668 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { 669 SMSC_TRACE(pdata, hw, "Forcing external PHY"); 670 smsc911x_phy_enable_external(pdata); 671 pdata->using_extphy = 1; 672 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { 673 SMSC_TRACE(pdata, hw, 674 "HW_CFG EXT_PHY_DET set, using external PHY"); 675 smsc911x_phy_enable_external(pdata); 676 pdata->using_extphy = 1; 677 } else { 678 SMSC_TRACE(pdata, hw, 679 "HW_CFG EXT_PHY_DET clear, using internal PHY"); 680 pdata->using_extphy = 0; 681 } 682 } 683 684 /* Fetches a tx status out of the status fifo */ 685 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata) 686 { 687 unsigned int result = 688 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_; 689 690 if (result != 0) 691 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO); 692 693 return result; 694 } 695 696 /* Fetches the next rx status */ 697 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata) 698 { 699 unsigned int result = 700 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_; 701 702 if (result != 0) 703 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO); 704 705 return result; 706 } 707 708 #ifdef USE_PHY_WORK_AROUND 709 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata) 710 { 711 unsigned int tries; 712 u32 wrsz; 713 u32 rdsz; 714 ulong bufp; 715 716 for (tries = 0; tries < 10; tries++) { 717 unsigned int txcmd_a; 718 unsigned int txcmd_b; 719 unsigned int status; 720 unsigned int pktlength; 721 unsigned int i; 722 723 /* Zero-out rx packet memory */ 724 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE); 725 726 /* Write tx packet to 118 */ 727 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16; 728 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 729 txcmd_a |= MIN_PACKET_SIZE; 730 731 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE; 732 733 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a); 734 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b); 735 736 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3); 737 wrsz = MIN_PACKET_SIZE + 3; 738 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3); 739 wrsz >>= 2; 740 741 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 742 743 /* Wait till transmit is done */ 744 i = 60; 745 do { 746 udelay(5); 747 status = smsc911x_tx_get_txstatus(pdata); 748 } while ((i--) && (!status)); 749 750 if (!status) { 751 SMSC_WARN(pdata, hw, 752 "Failed to transmit during loopback test"); 753 continue; 754 } 755 if (status & TX_STS_ES_) { 756 SMSC_WARN(pdata, hw, 757 "Transmit encountered errors during loopback test"); 758 continue; 759 } 760 761 /* Wait till receive is done */ 762 i = 60; 763 do { 764 udelay(5); 765 status = smsc911x_rx_get_rxstatus(pdata); 766 } while ((i--) && (!status)); 767 768 if (!status) { 769 SMSC_WARN(pdata, hw, 770 "Failed to receive during loopback test"); 771 continue; 772 } 773 if (status & RX_STS_ES_) { 774 SMSC_WARN(pdata, hw, 775 "Receive encountered errors during loopback test"); 776 continue; 777 } 778 779 pktlength = ((status & 0x3FFF0000UL) >> 16); 780 bufp = (ulong)pdata->loopback_rx_pkt; 781 rdsz = pktlength + 3; 782 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3); 783 rdsz >>= 2; 784 785 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz); 786 787 if (pktlength != (MIN_PACKET_SIZE + 4)) { 788 SMSC_WARN(pdata, hw, "Unexpected packet size " 789 "during loop back test, size=%d, will retry", 790 pktlength); 791 } else { 792 unsigned int j; 793 int mismatch = 0; 794 for (j = 0; j < MIN_PACKET_SIZE; j++) { 795 if (pdata->loopback_tx_pkt[j] 796 != pdata->loopback_rx_pkt[j]) { 797 mismatch = 1; 798 break; 799 } 800 } 801 if (!mismatch) { 802 SMSC_TRACE(pdata, hw, "Successfully verified " 803 "loopback packet"); 804 return 0; 805 } else { 806 SMSC_WARN(pdata, hw, "Data mismatch " 807 "during loop back test, will retry"); 808 } 809 } 810 } 811 812 return -EIO; 813 } 814 815 static int smsc911x_phy_reset(struct smsc911x_data *pdata) 816 { 817 unsigned int temp; 818 unsigned int i = 100000; 819 820 temp = smsc911x_reg_read(pdata, PMT_CTRL); 821 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_); 822 do { 823 msleep(1); 824 temp = smsc911x_reg_read(pdata, PMT_CTRL); 825 } while ((i--) && (temp & PMT_CTRL_PHY_RST_)); 826 827 if (unlikely(temp & PMT_CTRL_PHY_RST_)) { 828 SMSC_WARN(pdata, hw, "PHY reset failed to complete"); 829 return -EIO; 830 } 831 /* Extra delay required because the phy may not be completed with 832 * its reset when BMCR_RESET is cleared. Specs say 256 uS is 833 * enough delay but using 1ms here to be safe */ 834 msleep(1); 835 836 return 0; 837 } 838 839 static int smsc911x_phy_loopbacktest(struct net_device *dev) 840 { 841 struct smsc911x_data *pdata = netdev_priv(dev); 842 struct phy_device *phy_dev = dev->phydev; 843 int result = -EIO; 844 unsigned int i, val; 845 unsigned long flags; 846 847 /* Initialise tx packet using broadcast destination address */ 848 eth_broadcast_addr(pdata->loopback_tx_pkt); 849 850 /* Use incrementing source address */ 851 for (i = 6; i < 12; i++) 852 pdata->loopback_tx_pkt[i] = (char)i; 853 854 /* Set length type field */ 855 pdata->loopback_tx_pkt[12] = 0x00; 856 pdata->loopback_tx_pkt[13] = 0x00; 857 858 for (i = 14; i < MIN_PACKET_SIZE; i++) 859 pdata->loopback_tx_pkt[i] = (char)i; 860 861 val = smsc911x_reg_read(pdata, HW_CFG); 862 val &= HW_CFG_TX_FIF_SZ_; 863 val |= HW_CFG_SF_; 864 smsc911x_reg_write(pdata, HW_CFG, val); 865 866 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 867 smsc911x_reg_write(pdata, RX_CFG, 868 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8); 869 870 for (i = 0; i < 10; i++) { 871 /* Set PHY to 10/FD, no ANEG, and loopback mode */ 872 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, 873 MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX); 874 875 /* Enable MAC tx/rx, FD */ 876 spin_lock_irqsave(&pdata->mac_lock, flags); 877 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_ 878 | MAC_CR_TXEN_ | MAC_CR_RXEN_); 879 spin_unlock_irqrestore(&pdata->mac_lock, flags); 880 881 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) { 882 result = 0; 883 break; 884 } 885 pdata->resetcount++; 886 887 /* Disable MAC rx */ 888 spin_lock_irqsave(&pdata->mac_lock, flags); 889 smsc911x_mac_write(pdata, MAC_CR, 0); 890 spin_unlock_irqrestore(&pdata->mac_lock, flags); 891 892 smsc911x_phy_reset(pdata); 893 } 894 895 /* Disable MAC */ 896 spin_lock_irqsave(&pdata->mac_lock, flags); 897 smsc911x_mac_write(pdata, MAC_CR, 0); 898 spin_unlock_irqrestore(&pdata->mac_lock, flags); 899 900 /* Cancel PHY loopback mode */ 901 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0); 902 903 smsc911x_reg_write(pdata, TX_CFG, 0); 904 smsc911x_reg_write(pdata, RX_CFG, 0); 905 906 return result; 907 } 908 #endif /* USE_PHY_WORK_AROUND */ 909 910 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata) 911 { 912 struct net_device *ndev = pdata->dev; 913 struct phy_device *phy_dev = ndev->phydev; 914 u32 afc = smsc911x_reg_read(pdata, AFC_CFG); 915 u32 flow; 916 unsigned long flags; 917 918 if (phy_dev->duplex == DUPLEX_FULL) { 919 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); 920 u16 rmtadv = phy_read(phy_dev, MII_LPA); 921 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 922 923 if (cap & FLOW_CTRL_RX) 924 flow = 0xFFFF0002; 925 else 926 flow = 0; 927 928 if (cap & FLOW_CTRL_TX) 929 afc |= 0xF; 930 else 931 afc &= ~0xF; 932 933 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s", 934 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 935 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 936 } else { 937 SMSC_TRACE(pdata, hw, "half duplex"); 938 flow = 0; 939 afc |= 0xF; 940 } 941 942 spin_lock_irqsave(&pdata->mac_lock, flags); 943 smsc911x_mac_write(pdata, FLOW, flow); 944 spin_unlock_irqrestore(&pdata->mac_lock, flags); 945 946 smsc911x_reg_write(pdata, AFC_CFG, afc); 947 } 948 949 /* Update link mode if anything has changed. Called periodically when the 950 * PHY is in polling mode, even if nothing has changed. */ 951 static void smsc911x_phy_adjust_link(struct net_device *dev) 952 { 953 struct smsc911x_data *pdata = netdev_priv(dev); 954 struct phy_device *phy_dev = dev->phydev; 955 unsigned long flags; 956 int carrier; 957 958 if (phy_dev->duplex != pdata->last_duplex) { 959 unsigned int mac_cr; 960 SMSC_TRACE(pdata, hw, "duplex state has changed"); 961 962 spin_lock_irqsave(&pdata->mac_lock, flags); 963 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 964 if (phy_dev->duplex) { 965 SMSC_TRACE(pdata, hw, 966 "configuring for full duplex mode"); 967 mac_cr |= MAC_CR_FDPX_; 968 } else { 969 SMSC_TRACE(pdata, hw, 970 "configuring for half duplex mode"); 971 mac_cr &= ~MAC_CR_FDPX_; 972 } 973 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 974 spin_unlock_irqrestore(&pdata->mac_lock, flags); 975 976 smsc911x_phy_update_flowcontrol(pdata); 977 pdata->last_duplex = phy_dev->duplex; 978 } 979 980 carrier = netif_carrier_ok(dev); 981 if (carrier != pdata->last_carrier) { 982 SMSC_TRACE(pdata, hw, "carrier state has changed"); 983 if (carrier) { 984 SMSC_TRACE(pdata, hw, "configuring for carrier OK"); 985 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) && 986 (!pdata->using_extphy)) { 987 /* Restore original GPIO configuration */ 988 pdata->gpio_setting = pdata->gpio_orig_setting; 989 smsc911x_reg_write(pdata, GPIO_CFG, 990 pdata->gpio_setting); 991 } 992 } else { 993 SMSC_TRACE(pdata, hw, "configuring for no carrier"); 994 /* Check global setting that LED1 995 * usage is 10/100 indicator */ 996 pdata->gpio_setting = smsc911x_reg_read(pdata, 997 GPIO_CFG); 998 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) && 999 (!pdata->using_extphy)) { 1000 /* Force 10/100 LED off, after saving 1001 * original GPIO configuration */ 1002 pdata->gpio_orig_setting = pdata->gpio_setting; 1003 1004 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_; 1005 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_ 1006 | GPIO_CFG_GPIODIR0_ 1007 | GPIO_CFG_GPIOD0_); 1008 smsc911x_reg_write(pdata, GPIO_CFG, 1009 pdata->gpio_setting); 1010 } 1011 } 1012 pdata->last_carrier = carrier; 1013 } 1014 } 1015 1016 static int smsc911x_mii_probe(struct net_device *dev) 1017 { 1018 struct smsc911x_data *pdata = netdev_priv(dev); 1019 struct phy_device *phydev = NULL; 1020 int ret; 1021 1022 /* find the first phy */ 1023 phydev = phy_find_first(pdata->mii_bus); 1024 if (!phydev) { 1025 netdev_err(dev, "no PHY found\n"); 1026 return -ENODEV; 1027 } 1028 1029 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X", 1030 phydev->mdio.addr, phydev->phy_id); 1031 1032 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link, 1033 pdata->config.phy_interface); 1034 1035 if (ret) { 1036 netdev_err(dev, "Could not attach to PHY\n"); 1037 return ret; 1038 } 1039 1040 phy_attached_info(phydev); 1041 1042 phy_set_max_speed(phydev, SPEED_100); 1043 1044 /* mask with MAC supported features */ 1045 phy_support_asym_pause(phydev); 1046 1047 pdata->last_duplex = -1; 1048 pdata->last_carrier = -1; 1049 1050 #ifdef USE_PHY_WORK_AROUND 1051 if (smsc911x_phy_loopbacktest(dev) < 0) { 1052 SMSC_WARN(pdata, hw, "Failed Loop Back Test"); 1053 phy_disconnect(phydev); 1054 return -ENODEV; 1055 } 1056 SMSC_TRACE(pdata, hw, "Passed Loop Back Test"); 1057 #endif /* USE_PHY_WORK_AROUND */ 1058 1059 SMSC_TRACE(pdata, hw, "phy initialised successfully"); 1060 return 0; 1061 } 1062 1063 static int smsc911x_mii_init(struct platform_device *pdev, 1064 struct net_device *dev) 1065 { 1066 struct smsc911x_data *pdata = netdev_priv(dev); 1067 int err = -ENXIO; 1068 1069 pdata->mii_bus = mdiobus_alloc(); 1070 if (!pdata->mii_bus) { 1071 err = -ENOMEM; 1072 goto err_out_1; 1073 } 1074 1075 pdata->mii_bus->name = SMSC_MDIONAME; 1076 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 1077 pdev->name, pdev->id); 1078 pdata->mii_bus->priv = pdata; 1079 pdata->mii_bus->read = smsc911x_mii_read; 1080 pdata->mii_bus->write = smsc911x_mii_write; 1081 1082 pdata->mii_bus->parent = &pdev->dev; 1083 1084 switch (pdata->idrev & 0xFFFF0000) { 1085 case 0x01170000: 1086 case 0x01150000: 1087 case 0x117A0000: 1088 case 0x115A0000: 1089 /* External PHY supported, try to autodetect */ 1090 smsc911x_phy_initialise_external(pdata); 1091 break; 1092 default: 1093 SMSC_TRACE(pdata, hw, "External PHY is not supported, " 1094 "using internal PHY"); 1095 pdata->using_extphy = 0; 1096 break; 1097 } 1098 1099 if (!pdata->using_extphy) { 1100 /* Mask all PHYs except ID 1 (internal) */ 1101 pdata->mii_bus->phy_mask = ~(1 << 1); 1102 } 1103 1104 if (mdiobus_register(pdata->mii_bus)) { 1105 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1106 goto err_out_free_bus_2; 1107 } 1108 1109 return 0; 1110 1111 err_out_free_bus_2: 1112 mdiobus_free(pdata->mii_bus); 1113 err_out_1: 1114 return err; 1115 } 1116 1117 /* Gets the number of tx statuses in the fifo */ 1118 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata) 1119 { 1120 return (smsc911x_reg_read(pdata, TX_FIFO_INF) 1121 & TX_FIFO_INF_TSUSED_) >> 16; 1122 } 1123 1124 /* Reads tx statuses and increments counters where necessary */ 1125 static void smsc911x_tx_update_txcounters(struct net_device *dev) 1126 { 1127 struct smsc911x_data *pdata = netdev_priv(dev); 1128 unsigned int tx_stat; 1129 1130 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) { 1131 if (unlikely(tx_stat & 0x80000000)) { 1132 /* In this driver the packet tag is used as the packet 1133 * length. Since a packet length can never reach the 1134 * size of 0x8000, this bit is reserved. It is worth 1135 * noting that the "reserved bit" in the warning above 1136 * does not reference a hardware defined reserved bit 1137 * but rather a driver defined one. 1138 */ 1139 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high"); 1140 } else { 1141 if (unlikely(tx_stat & TX_STS_ES_)) { 1142 dev->stats.tx_errors++; 1143 } else { 1144 dev->stats.tx_packets++; 1145 dev->stats.tx_bytes += (tx_stat >> 16); 1146 } 1147 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) { 1148 dev->stats.collisions += 16; 1149 dev->stats.tx_aborted_errors += 1; 1150 } else { 1151 dev->stats.collisions += 1152 ((tx_stat >> 3) & 0xF); 1153 } 1154 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_)) 1155 dev->stats.tx_carrier_errors += 1; 1156 if (unlikely(tx_stat & TX_STS_LATE_COL_)) { 1157 dev->stats.collisions++; 1158 dev->stats.tx_aborted_errors++; 1159 } 1160 } 1161 } 1162 } 1163 1164 /* Increments the Rx error counters */ 1165 static void 1166 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat) 1167 { 1168 int crc_err = 0; 1169 1170 if (unlikely(rxstat & RX_STS_ES_)) { 1171 dev->stats.rx_errors++; 1172 if (unlikely(rxstat & RX_STS_CRC_ERR_)) { 1173 dev->stats.rx_crc_errors++; 1174 crc_err = 1; 1175 } 1176 } 1177 if (likely(!crc_err)) { 1178 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) && 1179 (rxstat & RX_STS_LENGTH_ERR_))) 1180 dev->stats.rx_length_errors++; 1181 if (rxstat & RX_STS_MCAST_) 1182 dev->stats.multicast++; 1183 } 1184 } 1185 1186 /* Quickly dumps bad packets */ 1187 static void 1188 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords) 1189 { 1190 if (likely(pktwords >= 4)) { 1191 unsigned int timeout = 500; 1192 unsigned int val; 1193 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_); 1194 do { 1195 udelay(1); 1196 val = smsc911x_reg_read(pdata, RX_DP_CTRL); 1197 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout); 1198 1199 if (unlikely(timeout == 0)) 1200 SMSC_WARN(pdata, hw, "Timed out waiting for " 1201 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val); 1202 } else { 1203 while (pktwords--) 1204 smsc911x_reg_read(pdata, RX_DATA_FIFO); 1205 } 1206 } 1207 1208 /* NAPI poll function */ 1209 static int smsc911x_poll(struct napi_struct *napi, int budget) 1210 { 1211 struct smsc911x_data *pdata = 1212 container_of(napi, struct smsc911x_data, napi); 1213 struct net_device *dev = pdata->dev; 1214 int npackets = 0; 1215 1216 while (npackets < budget) { 1217 unsigned int pktlength; 1218 unsigned int pktwords; 1219 struct sk_buff *skb; 1220 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata); 1221 1222 if (!rxstat) { 1223 unsigned int temp; 1224 /* We processed all packets available. Tell NAPI it can 1225 * stop polling then re-enable rx interrupts */ 1226 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_); 1227 napi_complete(napi); 1228 temp = smsc911x_reg_read(pdata, INT_EN); 1229 temp |= INT_EN_RSFL_EN_; 1230 smsc911x_reg_write(pdata, INT_EN, temp); 1231 break; 1232 } 1233 1234 /* Count packet for NAPI scheduling, even if it has an error. 1235 * Error packets still require cycles to discard */ 1236 npackets++; 1237 1238 pktlength = ((rxstat & 0x3FFF0000) >> 16); 1239 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2; 1240 smsc911x_rx_counterrors(dev, rxstat); 1241 1242 if (unlikely(rxstat & RX_STS_ES_)) { 1243 SMSC_WARN(pdata, rx_err, 1244 "Discarding packet with error bit set"); 1245 /* Packet has an error, discard it and continue with 1246 * the next */ 1247 smsc911x_rx_fastforward(pdata, pktwords); 1248 dev->stats.rx_dropped++; 1249 continue; 1250 } 1251 1252 skb = netdev_alloc_skb(dev, pktwords << 2); 1253 if (unlikely(!skb)) { 1254 SMSC_WARN(pdata, rx_err, 1255 "Unable to allocate skb for rx packet"); 1256 /* Drop the packet and stop this polling iteration */ 1257 smsc911x_rx_fastforward(pdata, pktwords); 1258 dev->stats.rx_dropped++; 1259 break; 1260 } 1261 1262 pdata->ops->rx_readfifo(pdata, 1263 (unsigned int *)skb->data, pktwords); 1264 1265 /* Align IP on 16B boundary */ 1266 skb_reserve(skb, NET_IP_ALIGN); 1267 skb_put(skb, pktlength - 4); 1268 skb->protocol = eth_type_trans(skb, dev); 1269 skb_checksum_none_assert(skb); 1270 netif_receive_skb(skb); 1271 1272 /* Update counters */ 1273 dev->stats.rx_packets++; 1274 dev->stats.rx_bytes += (pktlength - 4); 1275 } 1276 1277 /* Return total received packets */ 1278 return npackets; 1279 } 1280 1281 /* Returns hash bit number for given MAC address 1282 * Example: 1283 * 01 00 5E 00 00 01 -> returns bit number 31 */ 1284 static unsigned int smsc911x_hash(char addr[ETH_ALEN]) 1285 { 1286 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 1287 } 1288 1289 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata) 1290 { 1291 /* Performs the multicast & mac_cr update. This is called when 1292 * safe on the current hardware, and with the mac_lock held */ 1293 unsigned int mac_cr; 1294 1295 SMSC_ASSERT_MAC_LOCK(pdata); 1296 1297 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1298 mac_cr |= pdata->set_bits_mask; 1299 mac_cr &= ~(pdata->clear_bits_mask); 1300 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1301 smsc911x_mac_write(pdata, HASHH, pdata->hashhi); 1302 smsc911x_mac_write(pdata, HASHL, pdata->hashlo); 1303 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X", 1304 mac_cr, pdata->hashhi, pdata->hashlo); 1305 } 1306 1307 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata) 1308 { 1309 unsigned int mac_cr; 1310 1311 /* This function is only called for older LAN911x devices 1312 * (revA or revB), where MAC_CR, HASHH and HASHL should not 1313 * be modified during Rx - newer devices immediately update the 1314 * registers. 1315 * 1316 * This is called from interrupt context */ 1317 1318 spin_lock(&pdata->mac_lock); 1319 1320 /* Check Rx has stopped */ 1321 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_) 1322 SMSC_WARN(pdata, drv, "Rx not stopped"); 1323 1324 /* Perform the update - safe to do now Rx has stopped */ 1325 smsc911x_rx_multicast_update(pdata); 1326 1327 /* Re-enable Rx */ 1328 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1329 mac_cr |= MAC_CR_RXEN_; 1330 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1331 1332 pdata->multicast_update_pending = 0; 1333 1334 spin_unlock(&pdata->mac_lock); 1335 } 1336 1337 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata) 1338 { 1339 struct net_device *ndev = pdata->dev; 1340 struct phy_device *phy_dev = ndev->phydev; 1341 int rc = 0; 1342 1343 if (!phy_dev) 1344 return rc; 1345 1346 /* If the internal PHY is in General Power-Down mode, all, except the 1347 * management interface, is powered-down and stays in that condition as 1348 * long as Phy register bit 0.11 is HIGH. 1349 * 1350 * In that case, clear the bit 0.11, so the PHY powers up and we can 1351 * access to the phy registers. 1352 */ 1353 rc = phy_read(phy_dev, MII_BMCR); 1354 if (rc < 0) { 1355 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1356 return rc; 1357 } 1358 1359 /* If the PHY general power-down bit is not set is not necessary to 1360 * disable the general power down-mode. 1361 */ 1362 if (rc & BMCR_PDOWN) { 1363 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN); 1364 if (rc < 0) { 1365 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1366 return rc; 1367 } 1368 1369 usleep_range(1000, 1500); 1370 } 1371 1372 return 0; 1373 } 1374 1375 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata) 1376 { 1377 struct net_device *ndev = pdata->dev; 1378 struct phy_device *phy_dev = ndev->phydev; 1379 int rc = 0; 1380 1381 if (!phy_dev) 1382 return rc; 1383 1384 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS); 1385 1386 if (rc < 0) { 1387 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1388 return rc; 1389 } 1390 1391 /* Only disable if energy detect mode is already enabled */ 1392 if (rc & MII_LAN83C185_EDPWRDOWN) { 1393 /* Disable energy detect mode for this SMSC Transceivers */ 1394 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS, 1395 rc & (~MII_LAN83C185_EDPWRDOWN)); 1396 1397 if (rc < 0) { 1398 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1399 return rc; 1400 } 1401 /* Allow PHY to wakeup */ 1402 mdelay(2); 1403 } 1404 1405 return 0; 1406 } 1407 1408 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata) 1409 { 1410 struct net_device *ndev = pdata->dev; 1411 struct phy_device *phy_dev = ndev->phydev; 1412 int rc = 0; 1413 1414 if (!phy_dev) 1415 return rc; 1416 1417 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS); 1418 1419 if (rc < 0) { 1420 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1421 return rc; 1422 } 1423 1424 /* Only enable if energy detect mode is already disabled */ 1425 if (!(rc & MII_LAN83C185_EDPWRDOWN)) { 1426 /* Enable energy detect mode for this SMSC Transceivers */ 1427 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS, 1428 rc | MII_LAN83C185_EDPWRDOWN); 1429 1430 if (rc < 0) { 1431 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1432 return rc; 1433 } 1434 } 1435 return 0; 1436 } 1437 1438 static int smsc911x_soft_reset(struct smsc911x_data *pdata) 1439 { 1440 unsigned int timeout; 1441 unsigned int temp; 1442 int ret; 1443 unsigned int reset_offset = HW_CFG; 1444 unsigned int reset_mask = HW_CFG_SRST_; 1445 1446 /* 1447 * Make sure to power-up the PHY chip before doing a reset, otherwise 1448 * the reset fails. 1449 */ 1450 ret = smsc911x_phy_general_power_up(pdata); 1451 if (ret) { 1452 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip"); 1453 return ret; 1454 } 1455 1456 /* 1457 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that 1458 * are initialized in a Energy Detect Power-Down mode that prevents 1459 * the MAC chip to be software reseted. So we have to wakeup the PHY 1460 * before. 1461 */ 1462 if (pdata->generation == 4) { 1463 ret = smsc911x_phy_disable_energy_detect(pdata); 1464 1465 if (ret) { 1466 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1467 return ret; 1468 } 1469 } 1470 1471 if ((pdata->idrev & 0xFFFF0000) == LAN9250) { 1472 /* special reset for LAN9250 */ 1473 reset_offset = RESET_CTL; 1474 reset_mask = RESET_CTL_DIGITAL_RST_; 1475 } 1476 1477 /* Reset the LAN911x */ 1478 smsc911x_reg_write(pdata, reset_offset, reset_mask); 1479 1480 /* verify reset bit is cleared */ 1481 timeout = 10; 1482 do { 1483 udelay(10); 1484 temp = smsc911x_reg_read(pdata, reset_offset); 1485 } while ((--timeout) && (temp & reset_mask)); 1486 1487 if (unlikely(temp & reset_mask)) { 1488 SMSC_WARN(pdata, drv, "Failed to complete reset"); 1489 return -EIO; 1490 } 1491 1492 if (pdata->generation == 4) { 1493 ret = smsc911x_phy_enable_energy_detect(pdata); 1494 1495 if (ret) { 1496 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1497 return ret; 1498 } 1499 } 1500 1501 return 0; 1502 } 1503 1504 /* Sets the device MAC address to dev_addr, called with mac_lock held */ 1505 static void 1506 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6]) 1507 { 1508 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; 1509 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | 1510 (dev_addr[1] << 8) | dev_addr[0]; 1511 1512 SMSC_ASSERT_MAC_LOCK(pdata); 1513 1514 smsc911x_mac_write(pdata, ADDRH, mac_high16); 1515 smsc911x_mac_write(pdata, ADDRL, mac_low32); 1516 } 1517 1518 static void smsc911x_disable_irq_chip(struct net_device *dev) 1519 { 1520 struct smsc911x_data *pdata = netdev_priv(dev); 1521 1522 smsc911x_reg_write(pdata, INT_EN, 0); 1523 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 1524 } 1525 1526 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id) 1527 { 1528 struct net_device *dev = dev_id; 1529 struct smsc911x_data *pdata = netdev_priv(dev); 1530 u32 intsts = smsc911x_reg_read(pdata, INT_STS); 1531 u32 inten = smsc911x_reg_read(pdata, INT_EN); 1532 int serviced = IRQ_NONE; 1533 u32 temp; 1534 1535 if (unlikely(intsts & inten & INT_STS_SW_INT_)) { 1536 temp = smsc911x_reg_read(pdata, INT_EN); 1537 temp &= (~INT_EN_SW_INT_EN_); 1538 smsc911x_reg_write(pdata, INT_EN, temp); 1539 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_); 1540 pdata->software_irq_signal = 1; 1541 smp_wmb(); 1542 serviced = IRQ_HANDLED; 1543 } 1544 1545 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) { 1546 /* Called when there is a multicast update scheduled and 1547 * it is now safe to complete the update */ 1548 SMSC_TRACE(pdata, intr, "RX Stop interrupt"); 1549 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_); 1550 if (pdata->multicast_update_pending) 1551 smsc911x_rx_multicast_update_workaround(pdata); 1552 serviced = IRQ_HANDLED; 1553 } 1554 1555 if (intsts & inten & INT_STS_TDFA_) { 1556 temp = smsc911x_reg_read(pdata, FIFO_INT); 1557 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1558 smsc911x_reg_write(pdata, FIFO_INT, temp); 1559 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_); 1560 netif_wake_queue(dev); 1561 serviced = IRQ_HANDLED; 1562 } 1563 1564 if (unlikely(intsts & inten & INT_STS_RXE_)) { 1565 SMSC_TRACE(pdata, intr, "RX Error interrupt"); 1566 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_); 1567 serviced = IRQ_HANDLED; 1568 } 1569 1570 if (likely(intsts & inten & INT_STS_RSFL_)) { 1571 if (likely(napi_schedule_prep(&pdata->napi))) { 1572 /* Disable Rx interrupts */ 1573 temp = smsc911x_reg_read(pdata, INT_EN); 1574 temp &= (~INT_EN_RSFL_EN_); 1575 smsc911x_reg_write(pdata, INT_EN, temp); 1576 /* Schedule a NAPI poll */ 1577 __napi_schedule(&pdata->napi); 1578 } else { 1579 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed"); 1580 } 1581 serviced = IRQ_HANDLED; 1582 } 1583 1584 return serviced; 1585 } 1586 1587 static int smsc911x_open(struct net_device *dev) 1588 { 1589 struct smsc911x_data *pdata = netdev_priv(dev); 1590 unsigned int timeout; 1591 unsigned int temp; 1592 unsigned int intcfg; 1593 int retval; 1594 int irq_flags; 1595 1596 pm_runtime_get_sync(dev->dev.parent); 1597 1598 /* find and start the given phy */ 1599 if (!dev->phydev) { 1600 retval = smsc911x_mii_probe(dev); 1601 if (retval < 0) { 1602 SMSC_WARN(pdata, probe, "Error starting phy"); 1603 goto out; 1604 } 1605 } 1606 1607 /* Reset the LAN911x */ 1608 retval = smsc911x_soft_reset(pdata); 1609 if (retval) { 1610 SMSC_WARN(pdata, hw, "soft reset failed"); 1611 goto mii_free_out; 1612 } 1613 1614 smsc911x_reg_write(pdata, HW_CFG, 0x00050000); 1615 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); 1616 1617 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ 1618 spin_lock_irq(&pdata->mac_lock); 1619 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); 1620 spin_unlock_irq(&pdata->mac_lock); 1621 1622 /* Make sure EEPROM has finished loading before setting GPIO_CFG */ 1623 timeout = 50; 1624 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && 1625 --timeout) { 1626 udelay(10); 1627 } 1628 1629 if (unlikely(timeout == 0)) 1630 SMSC_WARN(pdata, ifup, 1631 "Timed out waiting for EEPROM busy bit to clear"); 1632 1633 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000); 1634 1635 /* The soft reset above cleared the device's MAC address, 1636 * restore it from local copy (set in probe) */ 1637 spin_lock_irq(&pdata->mac_lock); 1638 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1639 spin_unlock_irq(&pdata->mac_lock); 1640 1641 /* Initialise irqs, but leave all sources disabled */ 1642 smsc911x_disable_irq_chip(dev); 1643 1644 /* Set interrupt deassertion to 100uS */ 1645 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_); 1646 1647 if (pdata->config.irq_polarity) { 1648 SMSC_TRACE(pdata, ifup, "irq polarity: active high"); 1649 intcfg |= INT_CFG_IRQ_POL_; 1650 } else { 1651 SMSC_TRACE(pdata, ifup, "irq polarity: active low"); 1652 } 1653 1654 if (pdata->config.irq_type) { 1655 SMSC_TRACE(pdata, ifup, "irq type: push-pull"); 1656 intcfg |= INT_CFG_IRQ_TYPE_; 1657 } else { 1658 SMSC_TRACE(pdata, ifup, "irq type: open drain"); 1659 } 1660 1661 smsc911x_reg_write(pdata, INT_CFG, intcfg); 1662 1663 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq); 1664 pdata->software_irq_signal = 0; 1665 smp_wmb(); 1666 1667 irq_flags = irq_get_trigger_type(dev->irq); 1668 retval = request_irq(dev->irq, smsc911x_irqhandler, 1669 irq_flags | IRQF_SHARED, dev->name, dev); 1670 if (retval) { 1671 SMSC_WARN(pdata, probe, 1672 "Unable to claim requested irq: %d", dev->irq); 1673 goto mii_free_out; 1674 } 1675 1676 temp = smsc911x_reg_read(pdata, INT_EN); 1677 temp |= INT_EN_SW_INT_EN_; 1678 smsc911x_reg_write(pdata, INT_EN, temp); 1679 1680 timeout = 1000; 1681 while (timeout--) { 1682 if (pdata->software_irq_signal) 1683 break; 1684 msleep(1); 1685 } 1686 1687 if (!pdata->software_irq_signal) { 1688 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n", 1689 dev->irq); 1690 retval = -ENODEV; 1691 goto irq_stop_out; 1692 } 1693 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d", 1694 dev->irq); 1695 1696 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n", 1697 (unsigned long)pdata->ioaddr, dev->irq); 1698 1699 /* Reset the last known duplex and carrier */ 1700 pdata->last_duplex = -1; 1701 pdata->last_carrier = -1; 1702 1703 /* Bring the PHY up */ 1704 phy_start(dev->phydev); 1705 1706 temp = smsc911x_reg_read(pdata, HW_CFG); 1707 /* Preserve TX FIFO size and external PHY configuration */ 1708 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF); 1709 temp |= HW_CFG_SF_; 1710 smsc911x_reg_write(pdata, HW_CFG, temp); 1711 1712 temp = smsc911x_reg_read(pdata, FIFO_INT); 1713 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1714 temp &= ~(FIFO_INT_RX_STS_LEVEL_); 1715 smsc911x_reg_write(pdata, FIFO_INT, temp); 1716 1717 /* set RX Data offset to 2 bytes for alignment */ 1718 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8)); 1719 1720 /* enable NAPI polling before enabling RX interrupts */ 1721 napi_enable(&pdata->napi); 1722 1723 temp = smsc911x_reg_read(pdata, INT_EN); 1724 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_); 1725 smsc911x_reg_write(pdata, INT_EN, temp); 1726 1727 spin_lock_irq(&pdata->mac_lock); 1728 temp = smsc911x_mac_read(pdata, MAC_CR); 1729 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_); 1730 smsc911x_mac_write(pdata, MAC_CR, temp); 1731 spin_unlock_irq(&pdata->mac_lock); 1732 1733 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 1734 1735 netif_start_queue(dev); 1736 return 0; 1737 1738 irq_stop_out: 1739 free_irq(dev->irq, dev); 1740 mii_free_out: 1741 phy_disconnect(dev->phydev); 1742 dev->phydev = NULL; 1743 out: 1744 pm_runtime_put(dev->dev.parent); 1745 return retval; 1746 } 1747 1748 /* Entry point for stopping the interface */ 1749 static int smsc911x_stop(struct net_device *dev) 1750 { 1751 struct smsc911x_data *pdata = netdev_priv(dev); 1752 unsigned int temp; 1753 1754 /* Disable all device interrupts */ 1755 temp = smsc911x_reg_read(pdata, INT_CFG); 1756 temp &= ~INT_CFG_IRQ_EN_; 1757 smsc911x_reg_write(pdata, INT_CFG, temp); 1758 1759 /* Stop Tx and Rx polling */ 1760 netif_stop_queue(dev); 1761 napi_disable(&pdata->napi); 1762 1763 /* At this point all Rx and Tx activity is stopped */ 1764 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1765 smsc911x_tx_update_txcounters(dev); 1766 1767 free_irq(dev->irq, dev); 1768 1769 /* Bring the PHY down */ 1770 if (dev->phydev) { 1771 phy_stop(dev->phydev); 1772 phy_disconnect(dev->phydev); 1773 dev->phydev = NULL; 1774 } 1775 netif_carrier_off(dev); 1776 pm_runtime_put(dev->dev.parent); 1777 1778 SMSC_TRACE(pdata, ifdown, "Interface stopped"); 1779 return 0; 1780 } 1781 1782 /* Entry point for transmitting a packet */ 1783 static netdev_tx_t 1784 smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 1785 { 1786 struct smsc911x_data *pdata = netdev_priv(dev); 1787 unsigned int freespace; 1788 unsigned int tx_cmd_a; 1789 unsigned int tx_cmd_b; 1790 unsigned int temp; 1791 u32 wrsz; 1792 ulong bufp; 1793 1794 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_; 1795 1796 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD)) 1797 SMSC_WARN(pdata, tx_err, 1798 "Tx data fifo low, space available: %d", freespace); 1799 1800 /* Word alignment adjustment */ 1801 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16; 1802 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1803 tx_cmd_a |= (unsigned int)skb->len; 1804 1805 tx_cmd_b = ((unsigned int)skb->len) << 16; 1806 tx_cmd_b |= (unsigned int)skb->len; 1807 1808 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a); 1809 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b); 1810 1811 bufp = (ulong)skb->data & (~0x3); 1812 wrsz = (u32)skb->len + 3; 1813 wrsz += (u32)((ulong)skb->data & 0x3); 1814 wrsz >>= 2; 1815 1816 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 1817 freespace -= (skb->len + 32); 1818 skb_tx_timestamp(skb); 1819 dev_consume_skb_any(skb); 1820 1821 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30)) 1822 smsc911x_tx_update_txcounters(dev); 1823 1824 if (freespace < TX_FIFO_LOW_THRESHOLD) { 1825 netif_stop_queue(dev); 1826 temp = smsc911x_reg_read(pdata, FIFO_INT); 1827 temp &= 0x00FFFFFF; 1828 temp |= 0x32000000; 1829 smsc911x_reg_write(pdata, FIFO_INT, temp); 1830 } 1831 1832 return NETDEV_TX_OK; 1833 } 1834 1835 /* Entry point for getting status counters */ 1836 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev) 1837 { 1838 struct smsc911x_data *pdata = netdev_priv(dev); 1839 smsc911x_tx_update_txcounters(dev); 1840 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1841 return &dev->stats; 1842 } 1843 1844 /* Entry point for setting addressing modes */ 1845 static void smsc911x_set_multicast_list(struct net_device *dev) 1846 { 1847 struct smsc911x_data *pdata = netdev_priv(dev); 1848 unsigned long flags; 1849 1850 if (dev->flags & IFF_PROMISC) { 1851 /* Enabling promiscuous mode */ 1852 pdata->set_bits_mask = MAC_CR_PRMS_; 1853 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1854 pdata->hashhi = 0; 1855 pdata->hashlo = 0; 1856 } else if (dev->flags & IFF_ALLMULTI) { 1857 /* Enabling all multicast mode */ 1858 pdata->set_bits_mask = MAC_CR_MCPAS_; 1859 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_); 1860 pdata->hashhi = 0; 1861 pdata->hashlo = 0; 1862 } else if (!netdev_mc_empty(dev)) { 1863 /* Enabling specific multicast addresses */ 1864 unsigned int hash_high = 0; 1865 unsigned int hash_low = 0; 1866 struct netdev_hw_addr *ha; 1867 1868 pdata->set_bits_mask = MAC_CR_HPFILT_; 1869 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_); 1870 1871 netdev_for_each_mc_addr(ha, dev) { 1872 unsigned int bitnum = smsc911x_hash(ha->addr); 1873 unsigned int mask = 0x01 << (bitnum & 0x1F); 1874 1875 if (bitnum & 0x20) 1876 hash_high |= mask; 1877 else 1878 hash_low |= mask; 1879 } 1880 1881 pdata->hashhi = hash_high; 1882 pdata->hashlo = hash_low; 1883 } else { 1884 /* Enabling local MAC address only */ 1885 pdata->set_bits_mask = 0; 1886 pdata->clear_bits_mask = 1887 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1888 pdata->hashhi = 0; 1889 pdata->hashlo = 0; 1890 } 1891 1892 spin_lock_irqsave(&pdata->mac_lock, flags); 1893 1894 if (pdata->generation <= 1) { 1895 /* Older hardware revision - cannot change these flags while 1896 * receiving data */ 1897 if (!pdata->multicast_update_pending) { 1898 unsigned int temp; 1899 SMSC_TRACE(pdata, hw, "scheduling mcast update"); 1900 pdata->multicast_update_pending = 1; 1901 1902 /* Request the hardware to stop, then perform the 1903 * update when we get an RX_STOP interrupt */ 1904 temp = smsc911x_mac_read(pdata, MAC_CR); 1905 temp &= ~(MAC_CR_RXEN_); 1906 smsc911x_mac_write(pdata, MAC_CR, temp); 1907 } else { 1908 /* There is another update pending, this should now 1909 * use the newer values */ 1910 } 1911 } else { 1912 /* Newer hardware revision - can write immediately */ 1913 smsc911x_rx_multicast_update(pdata); 1914 } 1915 1916 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1917 } 1918 1919 #ifdef CONFIG_NET_POLL_CONTROLLER 1920 static void smsc911x_poll_controller(struct net_device *dev) 1921 { 1922 disable_irq(dev->irq); 1923 smsc911x_irqhandler(0, dev); 1924 enable_irq(dev->irq); 1925 } 1926 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1927 1928 static int smsc911x_set_mac_address(struct net_device *dev, void *p) 1929 { 1930 struct smsc911x_data *pdata = netdev_priv(dev); 1931 struct sockaddr *addr = p; 1932 1933 /* On older hardware revisions we cannot change the mac address 1934 * registers while receiving data. Newer devices can safely change 1935 * this at any time. */ 1936 if (pdata->generation <= 1 && netif_running(dev)) 1937 return -EBUSY; 1938 1939 if (!is_valid_ether_addr(addr->sa_data)) 1940 return -EADDRNOTAVAIL; 1941 1942 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 1943 1944 spin_lock_irq(&pdata->mac_lock); 1945 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1946 spin_unlock_irq(&pdata->mac_lock); 1947 1948 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 1949 1950 return 0; 1951 } 1952 1953 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev, 1954 struct ethtool_drvinfo *info) 1955 { 1956 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver)); 1957 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version)); 1958 strlcpy(info->bus_info, dev_name(dev->dev.parent), 1959 sizeof(info->bus_info)); 1960 } 1961 1962 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev) 1963 { 1964 struct smsc911x_data *pdata = netdev_priv(dev); 1965 return pdata->msg_enable; 1966 } 1967 1968 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level) 1969 { 1970 struct smsc911x_data *pdata = netdev_priv(dev); 1971 pdata->msg_enable = level; 1972 } 1973 1974 static int smsc911x_ethtool_getregslen(struct net_device *dev) 1975 { 1976 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) * 1977 sizeof(u32); 1978 } 1979 1980 static void 1981 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, 1982 void *buf) 1983 { 1984 struct smsc911x_data *pdata = netdev_priv(dev); 1985 struct phy_device *phy_dev = dev->phydev; 1986 unsigned long flags; 1987 unsigned int i; 1988 unsigned int j = 0; 1989 u32 *data = buf; 1990 1991 regs->version = pdata->idrev; 1992 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32))) 1993 data[j++] = smsc911x_reg_read(pdata, i); 1994 1995 for (i = MAC_CR; i <= WUCSR; i++) { 1996 spin_lock_irqsave(&pdata->mac_lock, flags); 1997 data[j++] = smsc911x_mac_read(pdata, i); 1998 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1999 } 2000 2001 for (i = 0; i <= 31; i++) 2002 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus, 2003 phy_dev->mdio.addr, i); 2004 } 2005 2006 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata) 2007 { 2008 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG); 2009 temp &= ~GPIO_CFG_EEPR_EN_; 2010 smsc911x_reg_write(pdata, GPIO_CFG, temp); 2011 msleep(1); 2012 } 2013 2014 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op) 2015 { 2016 int timeout = 100; 2017 u32 e2cmd; 2018 2019 SMSC_TRACE(pdata, drv, "op 0x%08x", op); 2020 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) { 2021 SMSC_WARN(pdata, drv, "Busy at start"); 2022 return -EBUSY; 2023 } 2024 2025 e2cmd = op | E2P_CMD_EPC_BUSY_; 2026 smsc911x_reg_write(pdata, E2P_CMD, e2cmd); 2027 2028 do { 2029 msleep(1); 2030 e2cmd = smsc911x_reg_read(pdata, E2P_CMD); 2031 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); 2032 2033 if (!timeout) { 2034 SMSC_TRACE(pdata, drv, "TIMED OUT"); 2035 return -EAGAIN; 2036 } 2037 2038 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { 2039 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation"); 2040 return -EINVAL; 2041 } 2042 2043 return 0; 2044 } 2045 2046 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata, 2047 u8 address, u8 *data) 2048 { 2049 u32 op = E2P_CMD_EPC_CMD_READ_ | address; 2050 int ret; 2051 2052 SMSC_TRACE(pdata, drv, "address 0x%x", address); 2053 ret = smsc911x_eeprom_send_cmd(pdata, op); 2054 2055 if (!ret) 2056 data[address] = smsc911x_reg_read(pdata, E2P_DATA); 2057 2058 return ret; 2059 } 2060 2061 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata, 2062 u8 address, u8 data) 2063 { 2064 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; 2065 int ret; 2066 2067 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data); 2068 ret = smsc911x_eeprom_send_cmd(pdata, op); 2069 2070 if (!ret) { 2071 op = E2P_CMD_EPC_CMD_WRITE_ | address; 2072 smsc911x_reg_write(pdata, E2P_DATA, (u32)data); 2073 2074 /* Workaround for hardware read-after-write restriction */ 2075 smsc911x_reg_read(pdata, BYTE_TEST); 2076 2077 ret = smsc911x_eeprom_send_cmd(pdata, op); 2078 } 2079 2080 return ret; 2081 } 2082 2083 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev) 2084 { 2085 return SMSC911X_EEPROM_SIZE; 2086 } 2087 2088 static int smsc911x_ethtool_get_eeprom(struct net_device *dev, 2089 struct ethtool_eeprom *eeprom, u8 *data) 2090 { 2091 struct smsc911x_data *pdata = netdev_priv(dev); 2092 u8 eeprom_data[SMSC911X_EEPROM_SIZE]; 2093 int len; 2094 int i; 2095 2096 smsc911x_eeprom_enable_access(pdata); 2097 2098 len = min(eeprom->len, SMSC911X_EEPROM_SIZE); 2099 for (i = 0; i < len; i++) { 2100 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data); 2101 if (ret < 0) { 2102 eeprom->len = 0; 2103 return ret; 2104 } 2105 } 2106 2107 memcpy(data, &eeprom_data[eeprom->offset], len); 2108 eeprom->len = len; 2109 return 0; 2110 } 2111 2112 static int smsc911x_ethtool_set_eeprom(struct net_device *dev, 2113 struct ethtool_eeprom *eeprom, u8 *data) 2114 { 2115 int ret; 2116 struct smsc911x_data *pdata = netdev_priv(dev); 2117 2118 smsc911x_eeprom_enable_access(pdata); 2119 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_); 2120 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data); 2121 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_); 2122 2123 /* Single byte write, according to man page */ 2124 eeprom->len = 1; 2125 2126 return ret; 2127 } 2128 2129 static const struct ethtool_ops smsc911x_ethtool_ops = { 2130 .get_link = ethtool_op_get_link, 2131 .get_drvinfo = smsc911x_ethtool_getdrvinfo, 2132 .nway_reset = phy_ethtool_nway_reset, 2133 .get_msglevel = smsc911x_ethtool_getmsglevel, 2134 .set_msglevel = smsc911x_ethtool_setmsglevel, 2135 .get_regs_len = smsc911x_ethtool_getregslen, 2136 .get_regs = smsc911x_ethtool_getregs, 2137 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len, 2138 .get_eeprom = smsc911x_ethtool_get_eeprom, 2139 .set_eeprom = smsc911x_ethtool_set_eeprom, 2140 .get_ts_info = ethtool_op_get_ts_info, 2141 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2142 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2143 }; 2144 2145 static const struct net_device_ops smsc911x_netdev_ops = { 2146 .ndo_open = smsc911x_open, 2147 .ndo_stop = smsc911x_stop, 2148 .ndo_start_xmit = smsc911x_hard_start_xmit, 2149 .ndo_get_stats = smsc911x_get_stats, 2150 .ndo_set_rx_mode = smsc911x_set_multicast_list, 2151 .ndo_do_ioctl = phy_do_ioctl_running, 2152 .ndo_validate_addr = eth_validate_addr, 2153 .ndo_set_mac_address = smsc911x_set_mac_address, 2154 #ifdef CONFIG_NET_POLL_CONTROLLER 2155 .ndo_poll_controller = smsc911x_poll_controller, 2156 #endif 2157 }; 2158 2159 /* copies the current mac address from hardware to dev->dev_addr */ 2160 static void smsc911x_read_mac_address(struct net_device *dev) 2161 { 2162 struct smsc911x_data *pdata = netdev_priv(dev); 2163 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); 2164 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); 2165 2166 dev->dev_addr[0] = (u8)(mac_low32); 2167 dev->dev_addr[1] = (u8)(mac_low32 >> 8); 2168 dev->dev_addr[2] = (u8)(mac_low32 >> 16); 2169 dev->dev_addr[3] = (u8)(mac_low32 >> 24); 2170 dev->dev_addr[4] = (u8)(mac_high16); 2171 dev->dev_addr[5] = (u8)(mac_high16 >> 8); 2172 } 2173 2174 /* Initializing private device structures, only called from probe */ 2175 static int smsc911x_init(struct net_device *dev) 2176 { 2177 struct smsc911x_data *pdata = netdev_priv(dev); 2178 unsigned int byte_test, mask; 2179 unsigned int to = 100; 2180 2181 SMSC_TRACE(pdata, probe, "Driver Parameters:"); 2182 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX", 2183 (unsigned long)pdata->ioaddr); 2184 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq); 2185 SMSC_TRACE(pdata, probe, "PHY will be autodetected."); 2186 2187 spin_lock_init(&pdata->dev_lock); 2188 spin_lock_init(&pdata->mac_lock); 2189 2190 if (pdata->ioaddr == NULL) { 2191 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000"); 2192 return -ENODEV; 2193 } 2194 2195 /* 2196 * poll the READY bit in PMT_CTRL. Any other access to the device is 2197 * forbidden while this bit isn't set. Try for 100ms 2198 * 2199 * Note that this test is done before the WORD_SWAP register is 2200 * programmed. So in some configurations the READY bit is at 16 before 2201 * WORD_SWAP is written to. This issue is worked around by waiting 2202 * until either bit 0 or bit 16 gets set in PMT_CTRL. 2203 * 2204 * SMSC has confirmed that checking bit 16 (marked as reserved in 2205 * the datasheet) is fine since these bits "will either never be set 2206 * or can only go high after READY does (so also indicate the device 2207 * is ready)". 2208 */ 2209 2210 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_); 2211 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to) 2212 udelay(1000); 2213 2214 if (to == 0) { 2215 netdev_err(dev, "Device not READY in 100ms aborting\n"); 2216 return -ENODEV; 2217 } 2218 2219 /* Check byte ordering */ 2220 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2221 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test); 2222 if (byte_test == 0x43218765) { 2223 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, " 2224 "applying WORD_SWAP"); 2225 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff); 2226 2227 /* 1 dummy read of BYTE_TEST is needed after a write to 2228 * WORD_SWAP before its contents are valid */ 2229 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2230 2231 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2232 } 2233 2234 if (byte_test != 0x87654321) { 2235 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test); 2236 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) { 2237 SMSC_WARN(pdata, probe, 2238 "top 16 bits equal to bottom 16 bits"); 2239 SMSC_TRACE(pdata, probe, 2240 "This may mean the chip is set " 2241 "for 32 bit while the bus is reading 16 bit"); 2242 } 2243 return -ENODEV; 2244 } 2245 2246 /* Default generation to zero (all workarounds apply) */ 2247 pdata->generation = 0; 2248 2249 pdata->idrev = smsc911x_reg_read(pdata, ID_REV); 2250 switch (pdata->idrev & 0xFFFF0000) { 2251 case LAN9118: 2252 case LAN9117: 2253 case LAN9116: 2254 case LAN9115: 2255 case LAN89218: 2256 /* LAN911[5678] family */ 2257 pdata->generation = pdata->idrev & 0x0000FFFF; 2258 break; 2259 2260 case LAN9218: 2261 case LAN9217: 2262 case LAN9216: 2263 case LAN9215: 2264 /* LAN921[5678] family */ 2265 pdata->generation = 3; 2266 break; 2267 2268 case LAN9210: 2269 case LAN9211: 2270 case LAN9220: 2271 case LAN9221: 2272 case LAN9250: 2273 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */ 2274 pdata->generation = 4; 2275 break; 2276 2277 default: 2278 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X", 2279 pdata->idrev); 2280 return -ENODEV; 2281 } 2282 2283 SMSC_TRACE(pdata, probe, 2284 "LAN911x identified, idrev: 0x%08X, generation: %d", 2285 pdata->idrev, pdata->generation); 2286 2287 if (pdata->generation == 0) 2288 SMSC_WARN(pdata, probe, 2289 "This driver is not intended for this chip revision"); 2290 2291 /* workaround for platforms without an eeprom, where the mac address 2292 * is stored elsewhere and set by the bootloader. This saves the 2293 * mac address before resetting the device */ 2294 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { 2295 spin_lock_irq(&pdata->mac_lock); 2296 smsc911x_read_mac_address(dev); 2297 spin_unlock_irq(&pdata->mac_lock); 2298 } 2299 2300 /* Reset the LAN911x */ 2301 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata)) 2302 return -ENODEV; 2303 2304 dev->flags |= IFF_MULTICAST; 2305 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT); 2306 dev->netdev_ops = &smsc911x_netdev_ops; 2307 dev->ethtool_ops = &smsc911x_ethtool_ops; 2308 2309 return 0; 2310 } 2311 2312 static int smsc911x_drv_remove(struct platform_device *pdev) 2313 { 2314 struct net_device *dev; 2315 struct smsc911x_data *pdata; 2316 struct resource *res; 2317 2318 dev = platform_get_drvdata(pdev); 2319 BUG_ON(!dev); 2320 pdata = netdev_priv(dev); 2321 BUG_ON(!pdata); 2322 BUG_ON(!pdata->ioaddr); 2323 2324 SMSC_TRACE(pdata, ifdown, "Stopping driver"); 2325 2326 unregister_netdev(dev); 2327 2328 mdiobus_unregister(pdata->mii_bus); 2329 mdiobus_free(pdata->mii_bus); 2330 2331 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2332 "smsc911x-memory"); 2333 if (!res) 2334 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2335 2336 release_mem_region(res->start, resource_size(res)); 2337 2338 iounmap(pdata->ioaddr); 2339 2340 (void)smsc911x_disable_resources(pdev); 2341 smsc911x_free_resources(pdev); 2342 2343 free_netdev(dev); 2344 2345 pm_runtime_disable(&pdev->dev); 2346 2347 return 0; 2348 } 2349 2350 /* standard register acces */ 2351 static const struct smsc911x_ops standard_smsc911x_ops = { 2352 .reg_read = __smsc911x_reg_read, 2353 .reg_write = __smsc911x_reg_write, 2354 .rx_readfifo = smsc911x_rx_readfifo, 2355 .tx_writefifo = smsc911x_tx_writefifo, 2356 }; 2357 2358 /* shifted register access */ 2359 static const struct smsc911x_ops shifted_smsc911x_ops = { 2360 .reg_read = __smsc911x_reg_read_shift, 2361 .reg_write = __smsc911x_reg_write_shift, 2362 .rx_readfifo = smsc911x_rx_readfifo_shift, 2363 .tx_writefifo = smsc911x_tx_writefifo_shift, 2364 }; 2365 2366 static int smsc911x_probe_config(struct smsc911x_platform_config *config, 2367 struct device *dev) 2368 { 2369 int phy_interface; 2370 u32 width = 0; 2371 int err; 2372 2373 phy_interface = device_get_phy_mode(dev); 2374 if (phy_interface < 0) 2375 phy_interface = PHY_INTERFACE_MODE_NA; 2376 config->phy_interface = phy_interface; 2377 2378 device_get_mac_address(dev, config->mac, ETH_ALEN); 2379 2380 err = device_property_read_u32(dev, "reg-io-width", &width); 2381 if (err == -ENXIO) 2382 return err; 2383 if (!err && width == 4) 2384 config->flags |= SMSC911X_USE_32BIT; 2385 else 2386 config->flags |= SMSC911X_USE_16BIT; 2387 2388 device_property_read_u32(dev, "reg-shift", &config->shift); 2389 2390 if (device_property_present(dev, "smsc,irq-active-high")) 2391 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH; 2392 2393 if (device_property_present(dev, "smsc,irq-push-pull")) 2394 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL; 2395 2396 if (device_property_present(dev, "smsc,force-internal-phy")) 2397 config->flags |= SMSC911X_FORCE_INTERNAL_PHY; 2398 2399 if (device_property_present(dev, "smsc,force-external-phy")) 2400 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY; 2401 2402 if (device_property_present(dev, "smsc,save-mac-address")) 2403 config->flags |= SMSC911X_SAVE_MAC_ADDRESS; 2404 2405 return 0; 2406 } 2407 2408 static int smsc911x_drv_probe(struct platform_device *pdev) 2409 { 2410 struct net_device *dev; 2411 struct smsc911x_data *pdata; 2412 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev); 2413 struct resource *res; 2414 int res_size, irq; 2415 int retval; 2416 2417 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2418 "smsc911x-memory"); 2419 if (!res) 2420 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2421 if (!res) { 2422 pr_warn("Could not allocate resource\n"); 2423 retval = -ENODEV; 2424 goto out_0; 2425 } 2426 res_size = resource_size(res); 2427 2428 irq = platform_get_irq(pdev, 0); 2429 if (irq == -EPROBE_DEFER) { 2430 retval = -EPROBE_DEFER; 2431 goto out_0; 2432 } else if (irq <= 0) { 2433 pr_warn("Could not allocate irq resource\n"); 2434 retval = -ENODEV; 2435 goto out_0; 2436 } 2437 2438 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) { 2439 retval = -EBUSY; 2440 goto out_0; 2441 } 2442 2443 dev = alloc_etherdev(sizeof(struct smsc911x_data)); 2444 if (!dev) { 2445 retval = -ENOMEM; 2446 goto out_release_io_1; 2447 } 2448 2449 SET_NETDEV_DEV(dev, &pdev->dev); 2450 2451 pdata = netdev_priv(dev); 2452 dev->irq = irq; 2453 pdata->ioaddr = ioremap(res->start, res_size); 2454 if (!pdata->ioaddr) { 2455 retval = -ENOMEM; 2456 goto out_ioremap_fail; 2457 } 2458 2459 pdata->dev = dev; 2460 pdata->msg_enable = ((1 << debug) - 1); 2461 2462 platform_set_drvdata(pdev, dev); 2463 2464 retval = smsc911x_request_resources(pdev); 2465 if (retval) 2466 goto out_request_resources_fail; 2467 2468 retval = smsc911x_enable_resources(pdev); 2469 if (retval) 2470 goto out_enable_resources_fail; 2471 2472 if (pdata->ioaddr == NULL) { 2473 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid"); 2474 retval = -ENOMEM; 2475 goto out_disable_resources; 2476 } 2477 2478 retval = smsc911x_probe_config(&pdata->config, &pdev->dev); 2479 if (retval && config) { 2480 /* copy config parameters across to pdata */ 2481 memcpy(&pdata->config, config, sizeof(pdata->config)); 2482 retval = 0; 2483 } 2484 2485 if (retval) { 2486 SMSC_WARN(pdata, probe, "Error smsc911x config not found"); 2487 goto out_disable_resources; 2488 } 2489 2490 /* assume standard, non-shifted, access to HW registers */ 2491 pdata->ops = &standard_smsc911x_ops; 2492 /* apply the right access if shifting is needed */ 2493 if (pdata->config.shift) 2494 pdata->ops = &shifted_smsc911x_ops; 2495 2496 pm_runtime_enable(&pdev->dev); 2497 pm_runtime_get_sync(&pdev->dev); 2498 2499 retval = smsc911x_init(dev); 2500 if (retval < 0) 2501 goto out_init_fail; 2502 2503 netif_carrier_off(dev); 2504 2505 retval = smsc911x_mii_init(pdev, dev); 2506 if (retval) { 2507 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval); 2508 goto out_init_fail; 2509 } 2510 2511 retval = register_netdev(dev); 2512 if (retval) { 2513 SMSC_WARN(pdata, probe, "Error %i registering device", retval); 2514 goto out_init_fail; 2515 } else { 2516 SMSC_TRACE(pdata, probe, 2517 "Network interface: \"%s\"", dev->name); 2518 } 2519 2520 spin_lock_irq(&pdata->mac_lock); 2521 2522 /* Check if mac address has been specified when bringing interface up */ 2523 if (is_valid_ether_addr(dev->dev_addr)) { 2524 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2525 SMSC_TRACE(pdata, probe, 2526 "MAC Address is specified by configuration"); 2527 } else if (is_valid_ether_addr(pdata->config.mac)) { 2528 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN); 2529 SMSC_TRACE(pdata, probe, 2530 "MAC Address specified by platform data"); 2531 } else { 2532 /* Try reading mac address from device. if EEPROM is present 2533 * it will already have been set */ 2534 smsc_get_mac(dev); 2535 2536 if (is_valid_ether_addr(dev->dev_addr)) { 2537 /* eeprom values are valid so use them */ 2538 SMSC_TRACE(pdata, probe, 2539 "Mac Address is read from LAN911x EEPROM"); 2540 } else { 2541 /* eeprom values are invalid, generate random MAC */ 2542 eth_hw_addr_random(dev); 2543 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2544 SMSC_TRACE(pdata, probe, 2545 "MAC Address is set to eth_random_addr"); 2546 } 2547 } 2548 2549 spin_unlock_irq(&pdata->mac_lock); 2550 pm_runtime_put(&pdev->dev); 2551 2552 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 2553 2554 return 0; 2555 2556 out_init_fail: 2557 pm_runtime_put(&pdev->dev); 2558 pm_runtime_disable(&pdev->dev); 2559 out_disable_resources: 2560 (void)smsc911x_disable_resources(pdev); 2561 out_enable_resources_fail: 2562 smsc911x_free_resources(pdev); 2563 out_request_resources_fail: 2564 iounmap(pdata->ioaddr); 2565 out_ioremap_fail: 2566 free_netdev(dev); 2567 out_release_io_1: 2568 release_mem_region(res->start, resource_size(res)); 2569 out_0: 2570 return retval; 2571 } 2572 2573 #ifdef CONFIG_PM 2574 /* This implementation assumes the devices remains powered on its VDDVARIO 2575 * pins during suspend. */ 2576 2577 /* TODO: implement freeze/thaw callbacks for hibernation.*/ 2578 2579 static int smsc911x_suspend(struct device *dev) 2580 { 2581 struct net_device *ndev = dev_get_drvdata(dev); 2582 struct smsc911x_data *pdata = netdev_priv(ndev); 2583 2584 if (netif_running(ndev)) { 2585 netif_stop_queue(ndev); 2586 netif_device_detach(ndev); 2587 } 2588 2589 /* enable wake on LAN, energy detection and the external PME 2590 * signal. */ 2591 smsc911x_reg_write(pdata, PMT_CTRL, 2592 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ | 2593 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_); 2594 2595 pm_runtime_disable(dev); 2596 pm_runtime_set_suspended(dev); 2597 2598 return 0; 2599 } 2600 2601 static int smsc911x_resume(struct device *dev) 2602 { 2603 struct net_device *ndev = dev_get_drvdata(dev); 2604 struct smsc911x_data *pdata = netdev_priv(ndev); 2605 unsigned int to = 100; 2606 2607 pm_runtime_enable(dev); 2608 pm_runtime_resume(dev); 2609 2610 /* Note 3.11 from the datasheet: 2611 * "When the LAN9220 is in a power saving state, a write of any 2612 * data to the BYTE_TEST register will wake-up the device." 2613 */ 2614 smsc911x_reg_write(pdata, BYTE_TEST, 0); 2615 2616 /* poll the READY bit in PMT_CTRL. Any other access to the device is 2617 * forbidden while this bit isn't set. Try for 100ms and return -EIO 2618 * if it failed. */ 2619 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) 2620 udelay(1000); 2621 2622 if (to == 0) 2623 return -EIO; 2624 2625 if (netif_running(ndev)) { 2626 netif_device_attach(ndev); 2627 netif_start_queue(ndev); 2628 } 2629 2630 return 0; 2631 } 2632 2633 static const struct dev_pm_ops smsc911x_pm_ops = { 2634 .suspend = smsc911x_suspend, 2635 .resume = smsc911x_resume, 2636 }; 2637 2638 #define SMSC911X_PM_OPS (&smsc911x_pm_ops) 2639 2640 #else 2641 #define SMSC911X_PM_OPS NULL 2642 #endif 2643 2644 #ifdef CONFIG_OF 2645 static const struct of_device_id smsc911x_dt_ids[] = { 2646 { .compatible = "smsc,lan9115", }, 2647 { /* sentinel */ } 2648 }; 2649 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids); 2650 #endif 2651 2652 #ifdef CONFIG_ACPI 2653 static const struct acpi_device_id smsc911x_acpi_match[] = { 2654 { "ARMH9118", 0 }, 2655 { } 2656 }; 2657 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match); 2658 #endif 2659 2660 static struct platform_driver smsc911x_driver = { 2661 .probe = smsc911x_drv_probe, 2662 .remove = smsc911x_drv_remove, 2663 .driver = { 2664 .name = SMSC_CHIPNAME, 2665 .pm = SMSC911X_PM_OPS, 2666 .of_match_table = of_match_ptr(smsc911x_dt_ids), 2667 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match), 2668 }, 2669 }; 2670 2671 /* Entry point for loading the module */ 2672 static int __init smsc911x_init_module(void) 2673 { 2674 SMSC_INITIALIZE(); 2675 return platform_driver_register(&smsc911x_driver); 2676 } 2677 2678 /* entry point for unloading the module */ 2679 static void __exit smsc911x_cleanup_module(void) 2680 { 2681 platform_driver_unregister(&smsc911x_driver); 2682 } 2683 2684 module_init(smsc911x_init_module); 2685 module_exit(smsc911x_cleanup_module); 2686