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, see <http://www.gnu.org/licenses/>. 18 * 19 *************************************************************************** 20 * Rewritten, heavily based on smsc911x simple driver by SMSC. 21 * Partly uses io macros from smc91x.c by Nicolas Pitre 22 * 23 * Supported devices: 24 * LAN9115, LAN9116, LAN9117, LAN9118 25 * LAN9215, LAN9216, LAN9217, LAN9218 26 * LAN9210, LAN9211 27 * LAN9220, LAN9221 28 * LAN89218,LAN9250 29 * 30 */ 31 32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 33 34 #include <linux/crc32.h> 35 #include <linux/clk.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 <linux/acpi.h> 63 #include <linux/pm_runtime.h> 64 #include <linux/property.h> 65 #include <linux/gpio/consumer.h> 66 67 #include "smsc911x.h" 68 69 #define SMSC_CHIPNAME "smsc911x" 70 #define SMSC_MDIONAME "smsc911x-mdio" 71 #define SMSC_DRV_VERSION "2008-10-21" 72 73 MODULE_LICENSE("GPL"); 74 MODULE_VERSION(SMSC_DRV_VERSION); 75 MODULE_ALIAS("platform:smsc911x"); 76 77 #if USE_DEBUG > 0 78 static int debug = 16; 79 #else 80 static int debug = 3; 81 #endif 82 83 module_param(debug, int, 0); 84 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 85 86 struct smsc911x_data; 87 88 struct smsc911x_ops { 89 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg); 90 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val); 91 void (*rx_readfifo)(struct smsc911x_data *pdata, 92 unsigned int *buf, unsigned int wordcount); 93 void (*tx_writefifo)(struct smsc911x_data *pdata, 94 unsigned int *buf, unsigned int wordcount); 95 }; 96 97 #define SMSC911X_NUM_SUPPLIES 2 98 99 struct smsc911x_data { 100 void __iomem *ioaddr; 101 102 unsigned int idrev; 103 104 /* used to decide which workarounds apply */ 105 unsigned int generation; 106 107 /* device configuration (copied from platform_data during probe) */ 108 struct smsc911x_platform_config config; 109 110 /* This needs to be acquired before calling any of below: 111 * smsc911x_mac_read(), smsc911x_mac_write() 112 */ 113 spinlock_t mac_lock; 114 115 /* spinlock to ensure register accesses are serialised */ 116 spinlock_t dev_lock; 117 118 struct mii_bus *mii_bus; 119 unsigned int using_extphy; 120 int last_duplex; 121 int last_carrier; 122 123 u32 msg_enable; 124 unsigned int gpio_setting; 125 unsigned int gpio_orig_setting; 126 struct net_device *dev; 127 struct napi_struct napi; 128 129 unsigned int software_irq_signal; 130 131 #ifdef USE_PHY_WORK_AROUND 132 #define MIN_PACKET_SIZE (64) 133 char loopback_tx_pkt[MIN_PACKET_SIZE]; 134 char loopback_rx_pkt[MIN_PACKET_SIZE]; 135 unsigned int resetcount; 136 #endif 137 138 /* Members for Multicast filter workaround */ 139 unsigned int multicast_update_pending; 140 unsigned int set_bits_mask; 141 unsigned int clear_bits_mask; 142 unsigned int hashhi; 143 unsigned int hashlo; 144 145 /* register access functions */ 146 const struct smsc911x_ops *ops; 147 148 /* regulators */ 149 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES]; 150 151 /* Reset GPIO */ 152 struct gpio_desc *reset_gpiod; 153 154 /* clock */ 155 struct clk *clk; 156 }; 157 158 /* Easy access to information */ 159 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift)) 160 161 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 162 { 163 if (pdata->config.flags & SMSC911X_USE_32BIT) 164 return readl(pdata->ioaddr + reg); 165 166 if (pdata->config.flags & SMSC911X_USE_16BIT) 167 return ((readw(pdata->ioaddr + reg) & 0xFFFF) | 168 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16)); 169 170 BUG(); 171 return 0; 172 } 173 174 static inline u32 175 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg) 176 { 177 if (pdata->config.flags & SMSC911X_USE_32BIT) 178 return readl(pdata->ioaddr + __smsc_shift(pdata, reg)); 179 180 if (pdata->config.flags & SMSC911X_USE_16BIT) 181 return (readw(pdata->ioaddr + 182 __smsc_shift(pdata, reg)) & 0xFFFF) | 183 ((readw(pdata->ioaddr + 184 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16); 185 186 BUG(); 187 return 0; 188 } 189 190 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 191 { 192 u32 data; 193 unsigned long flags; 194 195 spin_lock_irqsave(&pdata->dev_lock, flags); 196 data = pdata->ops->reg_read(pdata, reg); 197 spin_unlock_irqrestore(&pdata->dev_lock, flags); 198 199 return data; 200 } 201 202 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 203 u32 val) 204 { 205 if (pdata->config.flags & SMSC911X_USE_32BIT) { 206 writel(val, pdata->ioaddr + reg); 207 return; 208 } 209 210 if (pdata->config.flags & SMSC911X_USE_16BIT) { 211 writew(val & 0xFFFF, pdata->ioaddr + reg); 212 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2); 213 return; 214 } 215 216 BUG(); 217 } 218 219 static inline void 220 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val) 221 { 222 if (pdata->config.flags & SMSC911X_USE_32BIT) { 223 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg)); 224 return; 225 } 226 227 if (pdata->config.flags & SMSC911X_USE_16BIT) { 228 writew(val & 0xFFFF, 229 pdata->ioaddr + __smsc_shift(pdata, reg)); 230 writew((val >> 16) & 0xFFFF, 231 pdata->ioaddr + __smsc_shift(pdata, reg + 2)); 232 return; 233 } 234 235 BUG(); 236 } 237 238 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 239 u32 val) 240 { 241 unsigned long flags; 242 243 spin_lock_irqsave(&pdata->dev_lock, flags); 244 pdata->ops->reg_write(pdata, reg, val); 245 spin_unlock_irqrestore(&pdata->dev_lock, flags); 246 } 247 248 /* Writes a packet to the TX_DATA_FIFO */ 249 static inline void 250 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf, 251 unsigned int wordcount) 252 { 253 unsigned long flags; 254 255 spin_lock_irqsave(&pdata->dev_lock, flags); 256 257 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 258 while (wordcount--) 259 __smsc911x_reg_write(pdata, TX_DATA_FIFO, 260 swab32(*buf++)); 261 goto out; 262 } 263 264 if (pdata->config.flags & SMSC911X_USE_32BIT) { 265 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount); 266 goto out; 267 } 268 269 if (pdata->config.flags & SMSC911X_USE_16BIT) { 270 while (wordcount--) 271 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++); 272 goto out; 273 } 274 275 BUG(); 276 out: 277 spin_unlock_irqrestore(&pdata->dev_lock, flags); 278 } 279 280 /* Writes a packet to the TX_DATA_FIFO - shifted version */ 281 static inline void 282 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 283 unsigned int wordcount) 284 { 285 unsigned long flags; 286 287 spin_lock_irqsave(&pdata->dev_lock, flags); 288 289 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 290 while (wordcount--) 291 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO, 292 swab32(*buf++)); 293 goto out; 294 } 295 296 if (pdata->config.flags & SMSC911X_USE_32BIT) { 297 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata, 298 TX_DATA_FIFO), buf, wordcount); 299 goto out; 300 } 301 302 if (pdata->config.flags & SMSC911X_USE_16BIT) { 303 while (wordcount--) 304 __smsc911x_reg_write_shift(pdata, 305 TX_DATA_FIFO, *buf++); 306 goto out; 307 } 308 309 BUG(); 310 out: 311 spin_unlock_irqrestore(&pdata->dev_lock, flags); 312 } 313 314 /* Reads a packet out of the RX_DATA_FIFO */ 315 static inline void 316 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf, 317 unsigned int wordcount) 318 { 319 unsigned long flags; 320 321 spin_lock_irqsave(&pdata->dev_lock, flags); 322 323 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 324 while (wordcount--) 325 *buf++ = swab32(__smsc911x_reg_read(pdata, 326 RX_DATA_FIFO)); 327 goto out; 328 } 329 330 if (pdata->config.flags & SMSC911X_USE_32BIT) { 331 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount); 332 goto out; 333 } 334 335 if (pdata->config.flags & SMSC911X_USE_16BIT) { 336 while (wordcount--) 337 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO); 338 goto out; 339 } 340 341 BUG(); 342 out: 343 spin_unlock_irqrestore(&pdata->dev_lock, flags); 344 } 345 346 /* Reads a packet out of the RX_DATA_FIFO - shifted version */ 347 static inline void 348 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 349 unsigned int wordcount) 350 { 351 unsigned long flags; 352 353 spin_lock_irqsave(&pdata->dev_lock, flags); 354 355 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 356 while (wordcount--) 357 *buf++ = swab32(__smsc911x_reg_read_shift(pdata, 358 RX_DATA_FIFO)); 359 goto out; 360 } 361 362 if (pdata->config.flags & SMSC911X_USE_32BIT) { 363 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata, 364 RX_DATA_FIFO), buf, wordcount); 365 goto out; 366 } 367 368 if (pdata->config.flags & SMSC911X_USE_16BIT) { 369 while (wordcount--) 370 *buf++ = __smsc911x_reg_read_shift(pdata, 371 RX_DATA_FIFO); 372 goto out; 373 } 374 375 BUG(); 376 out: 377 spin_unlock_irqrestore(&pdata->dev_lock, flags); 378 } 379 380 /* 381 * enable regulator and clock resources. 382 */ 383 static int smsc911x_enable_resources(struct platform_device *pdev) 384 { 385 struct net_device *ndev = platform_get_drvdata(pdev); 386 struct smsc911x_data *pdata = netdev_priv(ndev); 387 int ret = 0; 388 389 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies), 390 pdata->supplies); 391 if (ret) 392 netdev_err(ndev, "failed to enable regulators %d\n", 393 ret); 394 395 if (!IS_ERR(pdata->clk)) { 396 ret = clk_prepare_enable(pdata->clk); 397 if (ret < 0) 398 netdev_err(ndev, "failed to enable clock %d\n", ret); 399 } 400 401 return ret; 402 } 403 404 /* 405 * disable resources, currently just regulators. 406 */ 407 static int smsc911x_disable_resources(struct platform_device *pdev) 408 { 409 struct net_device *ndev = platform_get_drvdata(pdev); 410 struct smsc911x_data *pdata = netdev_priv(ndev); 411 int ret = 0; 412 413 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies), 414 pdata->supplies); 415 416 if (!IS_ERR(pdata->clk)) 417 clk_disable_unprepare(pdata->clk); 418 419 return ret; 420 } 421 422 /* 423 * Request resources, currently just regulators. 424 * 425 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where 426 * these are not always-on we need to request regulators to be turned on 427 * before we can try to access the device registers. 428 */ 429 static int smsc911x_request_resources(struct platform_device *pdev) 430 { 431 struct net_device *ndev = platform_get_drvdata(pdev); 432 struct smsc911x_data *pdata = netdev_priv(ndev); 433 int ret = 0; 434 435 /* Request regulators */ 436 pdata->supplies[0].supply = "vdd33a"; 437 pdata->supplies[1].supply = "vddvario"; 438 ret = regulator_bulk_get(&pdev->dev, 439 ARRAY_SIZE(pdata->supplies), 440 pdata->supplies); 441 if (ret) { 442 /* 443 * Retry on deferrals, else just report the error 444 * and try to continue. 445 */ 446 if (ret == -EPROBE_DEFER) 447 return ret; 448 netdev_err(ndev, "couldn't get regulators %d\n", 449 ret); 450 } 451 452 /* Request optional RESET GPIO */ 453 pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev, 454 "reset", 455 GPIOD_OUT_LOW); 456 457 /* Request clock */ 458 pdata->clk = clk_get(&pdev->dev, NULL); 459 if (IS_ERR(pdata->clk)) 460 dev_dbg(&pdev->dev, "couldn't get clock %li\n", 461 PTR_ERR(pdata->clk)); 462 463 return ret; 464 } 465 466 /* 467 * Free resources, currently just regulators. 468 * 469 */ 470 static void smsc911x_free_resources(struct platform_device *pdev) 471 { 472 struct net_device *ndev = platform_get_drvdata(pdev); 473 struct smsc911x_data *pdata = netdev_priv(ndev); 474 475 /* Free regulators */ 476 regulator_bulk_free(ARRAY_SIZE(pdata->supplies), 477 pdata->supplies); 478 479 /* Free clock */ 480 if (!IS_ERR(pdata->clk)) { 481 clk_put(pdata->clk); 482 pdata->clk = NULL; 483 } 484 } 485 486 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read 487 * and smsc911x_mac_write, so assumes mac_lock is held */ 488 static int smsc911x_mac_complete(struct smsc911x_data *pdata) 489 { 490 int i; 491 u32 val; 492 493 SMSC_ASSERT_MAC_LOCK(pdata); 494 495 for (i = 0; i < 40; i++) { 496 val = smsc911x_reg_read(pdata, MAC_CSR_CMD); 497 if (!(val & MAC_CSR_CMD_CSR_BUSY_)) 498 return 0; 499 } 500 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. " 501 "MAC_CSR_CMD: 0x%08X", val); 502 return -EIO; 503 } 504 505 /* Fetches a MAC register value. Assumes mac_lock is acquired */ 506 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset) 507 { 508 unsigned int temp; 509 510 SMSC_ASSERT_MAC_LOCK(pdata); 511 512 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 513 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 514 SMSC_WARN(pdata, hw, "MAC busy at entry"); 515 return 0xFFFFFFFF; 516 } 517 518 /* Send the MAC cmd */ 519 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 520 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_)); 521 522 /* Workaround for hardware read-after-write restriction */ 523 temp = smsc911x_reg_read(pdata, BYTE_TEST); 524 525 /* Wait for the read to complete */ 526 if (likely(smsc911x_mac_complete(pdata) == 0)) 527 return smsc911x_reg_read(pdata, MAC_CSR_DATA); 528 529 SMSC_WARN(pdata, hw, "MAC busy after read"); 530 return 0xFFFFFFFF; 531 } 532 533 /* Set a mac register, mac_lock must be acquired before calling */ 534 static void smsc911x_mac_write(struct smsc911x_data *pdata, 535 unsigned int offset, u32 val) 536 { 537 unsigned int temp; 538 539 SMSC_ASSERT_MAC_LOCK(pdata); 540 541 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 542 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 543 SMSC_WARN(pdata, hw, 544 "smsc911x_mac_write failed, MAC busy at entry"); 545 return; 546 } 547 548 /* Send data to write */ 549 smsc911x_reg_write(pdata, MAC_CSR_DATA, val); 550 551 /* Write the actual data */ 552 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 553 MAC_CSR_CMD_CSR_BUSY_)); 554 555 /* Workaround for hardware read-after-write restriction */ 556 temp = smsc911x_reg_read(pdata, BYTE_TEST); 557 558 /* Wait for the write to complete */ 559 if (likely(smsc911x_mac_complete(pdata) == 0)) 560 return; 561 562 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write"); 563 } 564 565 /* Get a phy register */ 566 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx) 567 { 568 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 569 unsigned long flags; 570 unsigned int addr; 571 int i, reg; 572 573 spin_lock_irqsave(&pdata->mac_lock, flags); 574 575 /* Confirm MII not busy */ 576 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 577 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???"); 578 reg = -EIO; 579 goto out; 580 } 581 582 /* Set the address, index & direction (read from PHY) */ 583 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6); 584 smsc911x_mac_write(pdata, MII_ACC, addr); 585 586 /* Wait for read to complete w/ timeout */ 587 for (i = 0; i < 100; i++) 588 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 589 reg = smsc911x_mac_read(pdata, MII_DATA); 590 goto out; 591 } 592 593 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish"); 594 reg = -EIO; 595 596 out: 597 spin_unlock_irqrestore(&pdata->mac_lock, flags); 598 return reg; 599 } 600 601 /* Set a phy register */ 602 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx, 603 u16 val) 604 { 605 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 606 unsigned long flags; 607 unsigned int addr; 608 int i, reg; 609 610 spin_lock_irqsave(&pdata->mac_lock, flags); 611 612 /* Confirm MII not busy */ 613 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 614 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???"); 615 reg = -EIO; 616 goto out; 617 } 618 619 /* Put the data to write in the MAC */ 620 smsc911x_mac_write(pdata, MII_DATA, val); 621 622 /* Set the address, index & direction (write to PHY) */ 623 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | 624 MII_ACC_MII_WRITE_; 625 smsc911x_mac_write(pdata, MII_ACC, addr); 626 627 /* Wait for write to complete w/ timeout */ 628 for (i = 0; i < 100; i++) 629 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 630 reg = 0; 631 goto out; 632 } 633 634 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish"); 635 reg = -EIO; 636 637 out: 638 spin_unlock_irqrestore(&pdata->mac_lock, flags); 639 return reg; 640 } 641 642 /* Switch to external phy. Assumes tx and rx are stopped. */ 643 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) 644 { 645 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 646 647 /* Disable phy clocks to the MAC */ 648 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 649 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; 650 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 651 udelay(10); /* Enough time for clocks to stop */ 652 653 /* Switch to external phy */ 654 hwcfg |= HW_CFG_EXT_PHY_EN_; 655 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 656 657 /* Enable phy clocks to the MAC */ 658 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 659 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; 660 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 661 udelay(10); /* Enough time for clocks to restart */ 662 663 hwcfg |= HW_CFG_SMI_SEL_; 664 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 665 } 666 667 /* Autodetects and enables external phy if present on supported chips. 668 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY 669 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ 670 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) 671 { 672 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 673 674 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { 675 SMSC_TRACE(pdata, hw, "Forcing internal PHY"); 676 pdata->using_extphy = 0; 677 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { 678 SMSC_TRACE(pdata, hw, "Forcing external PHY"); 679 smsc911x_phy_enable_external(pdata); 680 pdata->using_extphy = 1; 681 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { 682 SMSC_TRACE(pdata, hw, 683 "HW_CFG EXT_PHY_DET set, using external PHY"); 684 smsc911x_phy_enable_external(pdata); 685 pdata->using_extphy = 1; 686 } else { 687 SMSC_TRACE(pdata, hw, 688 "HW_CFG EXT_PHY_DET clear, using internal PHY"); 689 pdata->using_extphy = 0; 690 } 691 } 692 693 /* Fetches a tx status out of the status fifo */ 694 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata) 695 { 696 unsigned int result = 697 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_; 698 699 if (result != 0) 700 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO); 701 702 return result; 703 } 704 705 /* Fetches the next rx status */ 706 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata) 707 { 708 unsigned int result = 709 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_; 710 711 if (result != 0) 712 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO); 713 714 return result; 715 } 716 717 #ifdef USE_PHY_WORK_AROUND 718 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata) 719 { 720 unsigned int tries; 721 u32 wrsz; 722 u32 rdsz; 723 ulong bufp; 724 725 for (tries = 0; tries < 10; tries++) { 726 unsigned int txcmd_a; 727 unsigned int txcmd_b; 728 unsigned int status; 729 unsigned int pktlength; 730 unsigned int i; 731 732 /* Zero-out rx packet memory */ 733 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE); 734 735 /* Write tx packet to 118 */ 736 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16; 737 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 738 txcmd_a |= MIN_PACKET_SIZE; 739 740 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE; 741 742 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a); 743 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b); 744 745 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3); 746 wrsz = MIN_PACKET_SIZE + 3; 747 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3); 748 wrsz >>= 2; 749 750 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 751 752 /* Wait till transmit is done */ 753 i = 60; 754 do { 755 udelay(5); 756 status = smsc911x_tx_get_txstatus(pdata); 757 } while ((i--) && (!status)); 758 759 if (!status) { 760 SMSC_WARN(pdata, hw, 761 "Failed to transmit during loopback test"); 762 continue; 763 } 764 if (status & TX_STS_ES_) { 765 SMSC_WARN(pdata, hw, 766 "Transmit encountered errors during loopback test"); 767 continue; 768 } 769 770 /* Wait till receive is done */ 771 i = 60; 772 do { 773 udelay(5); 774 status = smsc911x_rx_get_rxstatus(pdata); 775 } while ((i--) && (!status)); 776 777 if (!status) { 778 SMSC_WARN(pdata, hw, 779 "Failed to receive during loopback test"); 780 continue; 781 } 782 if (status & RX_STS_ES_) { 783 SMSC_WARN(pdata, hw, 784 "Receive encountered errors during loopback test"); 785 continue; 786 } 787 788 pktlength = ((status & 0x3FFF0000UL) >> 16); 789 bufp = (ulong)pdata->loopback_rx_pkt; 790 rdsz = pktlength + 3; 791 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3); 792 rdsz >>= 2; 793 794 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz); 795 796 if (pktlength != (MIN_PACKET_SIZE + 4)) { 797 SMSC_WARN(pdata, hw, "Unexpected packet size " 798 "during loop back test, size=%d, will retry", 799 pktlength); 800 } else { 801 unsigned int j; 802 int mismatch = 0; 803 for (j = 0; j < MIN_PACKET_SIZE; j++) { 804 if (pdata->loopback_tx_pkt[j] 805 != pdata->loopback_rx_pkt[j]) { 806 mismatch = 1; 807 break; 808 } 809 } 810 if (!mismatch) { 811 SMSC_TRACE(pdata, hw, "Successfully verified " 812 "loopback packet"); 813 return 0; 814 } else { 815 SMSC_WARN(pdata, hw, "Data mismatch " 816 "during loop back test, will retry"); 817 } 818 } 819 } 820 821 return -EIO; 822 } 823 824 static int smsc911x_phy_reset(struct smsc911x_data *pdata) 825 { 826 unsigned int temp; 827 unsigned int i = 100000; 828 829 temp = smsc911x_reg_read(pdata, PMT_CTRL); 830 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_); 831 do { 832 msleep(1); 833 temp = smsc911x_reg_read(pdata, PMT_CTRL); 834 } while ((i--) && (temp & PMT_CTRL_PHY_RST_)); 835 836 if (unlikely(temp & PMT_CTRL_PHY_RST_)) { 837 SMSC_WARN(pdata, hw, "PHY reset failed to complete"); 838 return -EIO; 839 } 840 /* Extra delay required because the phy may not be completed with 841 * its reset when BMCR_RESET is cleared. Specs say 256 uS is 842 * enough delay but using 1ms here to be safe */ 843 msleep(1); 844 845 return 0; 846 } 847 848 static int smsc911x_phy_loopbacktest(struct net_device *dev) 849 { 850 struct smsc911x_data *pdata = netdev_priv(dev); 851 struct phy_device *phy_dev = dev->phydev; 852 int result = -EIO; 853 unsigned int i, val; 854 unsigned long flags; 855 856 /* Initialise tx packet using broadcast destination address */ 857 eth_broadcast_addr(pdata->loopback_tx_pkt); 858 859 /* Use incrementing source address */ 860 for (i = 6; i < 12; i++) 861 pdata->loopback_tx_pkt[i] = (char)i; 862 863 /* Set length type field */ 864 pdata->loopback_tx_pkt[12] = 0x00; 865 pdata->loopback_tx_pkt[13] = 0x00; 866 867 for (i = 14; i < MIN_PACKET_SIZE; i++) 868 pdata->loopback_tx_pkt[i] = (char)i; 869 870 val = smsc911x_reg_read(pdata, HW_CFG); 871 val &= HW_CFG_TX_FIF_SZ_; 872 val |= HW_CFG_SF_; 873 smsc911x_reg_write(pdata, HW_CFG, val); 874 875 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 876 smsc911x_reg_write(pdata, RX_CFG, 877 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8); 878 879 for (i = 0; i < 10; i++) { 880 /* Set PHY to 10/FD, no ANEG, and loopback mode */ 881 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, 882 MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX); 883 884 /* Enable MAC tx/rx, FD */ 885 spin_lock_irqsave(&pdata->mac_lock, flags); 886 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_ 887 | MAC_CR_TXEN_ | MAC_CR_RXEN_); 888 spin_unlock_irqrestore(&pdata->mac_lock, flags); 889 890 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) { 891 result = 0; 892 break; 893 } 894 pdata->resetcount++; 895 896 /* Disable MAC rx */ 897 spin_lock_irqsave(&pdata->mac_lock, flags); 898 smsc911x_mac_write(pdata, MAC_CR, 0); 899 spin_unlock_irqrestore(&pdata->mac_lock, flags); 900 901 smsc911x_phy_reset(pdata); 902 } 903 904 /* Disable MAC */ 905 spin_lock_irqsave(&pdata->mac_lock, flags); 906 smsc911x_mac_write(pdata, MAC_CR, 0); 907 spin_unlock_irqrestore(&pdata->mac_lock, flags); 908 909 /* Cancel PHY loopback mode */ 910 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0); 911 912 smsc911x_reg_write(pdata, TX_CFG, 0); 913 smsc911x_reg_write(pdata, RX_CFG, 0); 914 915 return result; 916 } 917 #endif /* USE_PHY_WORK_AROUND */ 918 919 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata) 920 { 921 struct net_device *ndev = pdata->dev; 922 struct phy_device *phy_dev = ndev->phydev; 923 u32 afc = smsc911x_reg_read(pdata, AFC_CFG); 924 u32 flow; 925 unsigned long flags; 926 927 if (phy_dev->duplex == DUPLEX_FULL) { 928 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); 929 u16 rmtadv = phy_read(phy_dev, MII_LPA); 930 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 931 932 if (cap & FLOW_CTRL_RX) 933 flow = 0xFFFF0002; 934 else 935 flow = 0; 936 937 if (cap & FLOW_CTRL_TX) 938 afc |= 0xF; 939 else 940 afc &= ~0xF; 941 942 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s", 943 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 944 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 945 } else { 946 SMSC_TRACE(pdata, hw, "half duplex"); 947 flow = 0; 948 afc |= 0xF; 949 } 950 951 spin_lock_irqsave(&pdata->mac_lock, flags); 952 smsc911x_mac_write(pdata, FLOW, flow); 953 spin_unlock_irqrestore(&pdata->mac_lock, flags); 954 955 smsc911x_reg_write(pdata, AFC_CFG, afc); 956 } 957 958 /* Update link mode if anything has changed. Called periodically when the 959 * PHY is in polling mode, even if nothing has changed. */ 960 static void smsc911x_phy_adjust_link(struct net_device *dev) 961 { 962 struct smsc911x_data *pdata = netdev_priv(dev); 963 struct phy_device *phy_dev = dev->phydev; 964 unsigned long flags; 965 int carrier; 966 967 if (phy_dev->duplex != pdata->last_duplex) { 968 unsigned int mac_cr; 969 SMSC_TRACE(pdata, hw, "duplex state has changed"); 970 971 spin_lock_irqsave(&pdata->mac_lock, flags); 972 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 973 if (phy_dev->duplex) { 974 SMSC_TRACE(pdata, hw, 975 "configuring for full duplex mode"); 976 mac_cr |= MAC_CR_FDPX_; 977 } else { 978 SMSC_TRACE(pdata, hw, 979 "configuring for half duplex mode"); 980 mac_cr &= ~MAC_CR_FDPX_; 981 } 982 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 983 spin_unlock_irqrestore(&pdata->mac_lock, flags); 984 985 smsc911x_phy_update_flowcontrol(pdata); 986 pdata->last_duplex = phy_dev->duplex; 987 } 988 989 carrier = netif_carrier_ok(dev); 990 if (carrier != pdata->last_carrier) { 991 SMSC_TRACE(pdata, hw, "carrier state has changed"); 992 if (carrier) { 993 SMSC_TRACE(pdata, hw, "configuring for carrier OK"); 994 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) && 995 (!pdata->using_extphy)) { 996 /* Restore original GPIO configuration */ 997 pdata->gpio_setting = pdata->gpio_orig_setting; 998 smsc911x_reg_write(pdata, GPIO_CFG, 999 pdata->gpio_setting); 1000 } 1001 } else { 1002 SMSC_TRACE(pdata, hw, "configuring for no carrier"); 1003 /* Check global setting that LED1 1004 * usage is 10/100 indicator */ 1005 pdata->gpio_setting = smsc911x_reg_read(pdata, 1006 GPIO_CFG); 1007 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) && 1008 (!pdata->using_extphy)) { 1009 /* Force 10/100 LED off, after saving 1010 * original GPIO configuration */ 1011 pdata->gpio_orig_setting = pdata->gpio_setting; 1012 1013 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_; 1014 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_ 1015 | GPIO_CFG_GPIODIR0_ 1016 | GPIO_CFG_GPIOD0_); 1017 smsc911x_reg_write(pdata, GPIO_CFG, 1018 pdata->gpio_setting); 1019 } 1020 } 1021 pdata->last_carrier = carrier; 1022 } 1023 } 1024 1025 static int smsc911x_mii_probe(struct net_device *dev) 1026 { 1027 struct smsc911x_data *pdata = netdev_priv(dev); 1028 struct phy_device *phydev = NULL; 1029 int ret; 1030 1031 /* find the first phy */ 1032 phydev = phy_find_first(pdata->mii_bus); 1033 if (!phydev) { 1034 netdev_err(dev, "no PHY found\n"); 1035 return -ENODEV; 1036 } 1037 1038 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X", 1039 phydev->mdio.addr, phydev->phy_id); 1040 1041 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link, 1042 pdata->config.phy_interface); 1043 1044 if (ret) { 1045 netdev_err(dev, "Could not attach to PHY\n"); 1046 return ret; 1047 } 1048 1049 phy_attached_info(phydev); 1050 1051 /* mask with MAC supported features */ 1052 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | 1053 SUPPORTED_Asym_Pause); 1054 phydev->advertising = phydev->supported; 1055 1056 pdata->last_duplex = -1; 1057 pdata->last_carrier = -1; 1058 1059 #ifdef USE_PHY_WORK_AROUND 1060 if (smsc911x_phy_loopbacktest(dev) < 0) { 1061 SMSC_WARN(pdata, hw, "Failed Loop Back Test"); 1062 phy_disconnect(phydev); 1063 return -ENODEV; 1064 } 1065 SMSC_TRACE(pdata, hw, "Passed Loop Back Test"); 1066 #endif /* USE_PHY_WORK_AROUND */ 1067 1068 SMSC_TRACE(pdata, hw, "phy initialised successfully"); 1069 return 0; 1070 } 1071 1072 static int smsc911x_mii_init(struct platform_device *pdev, 1073 struct net_device *dev) 1074 { 1075 struct smsc911x_data *pdata = netdev_priv(dev); 1076 int err = -ENXIO; 1077 1078 pdata->mii_bus = mdiobus_alloc(); 1079 if (!pdata->mii_bus) { 1080 err = -ENOMEM; 1081 goto err_out_1; 1082 } 1083 1084 pdata->mii_bus->name = SMSC_MDIONAME; 1085 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 1086 pdev->name, pdev->id); 1087 pdata->mii_bus->priv = pdata; 1088 pdata->mii_bus->read = smsc911x_mii_read; 1089 pdata->mii_bus->write = smsc911x_mii_write; 1090 1091 pdata->mii_bus->parent = &pdev->dev; 1092 1093 switch (pdata->idrev & 0xFFFF0000) { 1094 case 0x01170000: 1095 case 0x01150000: 1096 case 0x117A0000: 1097 case 0x115A0000: 1098 /* External PHY supported, try to autodetect */ 1099 smsc911x_phy_initialise_external(pdata); 1100 break; 1101 default: 1102 SMSC_TRACE(pdata, hw, "External PHY is not supported, " 1103 "using internal PHY"); 1104 pdata->using_extphy = 0; 1105 break; 1106 } 1107 1108 if (!pdata->using_extphy) { 1109 /* Mask all PHYs except ID 1 (internal) */ 1110 pdata->mii_bus->phy_mask = ~(1 << 1); 1111 } 1112 1113 if (mdiobus_register(pdata->mii_bus)) { 1114 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1115 goto err_out_free_bus_2; 1116 } 1117 1118 return 0; 1119 1120 err_out_free_bus_2: 1121 mdiobus_free(pdata->mii_bus); 1122 err_out_1: 1123 return err; 1124 } 1125 1126 /* Gets the number of tx statuses in the fifo */ 1127 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata) 1128 { 1129 return (smsc911x_reg_read(pdata, TX_FIFO_INF) 1130 & TX_FIFO_INF_TSUSED_) >> 16; 1131 } 1132 1133 /* Reads tx statuses and increments counters where necessary */ 1134 static void smsc911x_tx_update_txcounters(struct net_device *dev) 1135 { 1136 struct smsc911x_data *pdata = netdev_priv(dev); 1137 unsigned int tx_stat; 1138 1139 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) { 1140 if (unlikely(tx_stat & 0x80000000)) { 1141 /* In this driver the packet tag is used as the packet 1142 * length. Since a packet length can never reach the 1143 * size of 0x8000, this bit is reserved. It is worth 1144 * noting that the "reserved bit" in the warning above 1145 * does not reference a hardware defined reserved bit 1146 * but rather a driver defined one. 1147 */ 1148 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high"); 1149 } else { 1150 if (unlikely(tx_stat & TX_STS_ES_)) { 1151 dev->stats.tx_errors++; 1152 } else { 1153 dev->stats.tx_packets++; 1154 dev->stats.tx_bytes += (tx_stat >> 16); 1155 } 1156 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) { 1157 dev->stats.collisions += 16; 1158 dev->stats.tx_aborted_errors += 1; 1159 } else { 1160 dev->stats.collisions += 1161 ((tx_stat >> 3) & 0xF); 1162 } 1163 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_)) 1164 dev->stats.tx_carrier_errors += 1; 1165 if (unlikely(tx_stat & TX_STS_LATE_COL_)) { 1166 dev->stats.collisions++; 1167 dev->stats.tx_aborted_errors++; 1168 } 1169 } 1170 } 1171 } 1172 1173 /* Increments the Rx error counters */ 1174 static void 1175 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat) 1176 { 1177 int crc_err = 0; 1178 1179 if (unlikely(rxstat & RX_STS_ES_)) { 1180 dev->stats.rx_errors++; 1181 if (unlikely(rxstat & RX_STS_CRC_ERR_)) { 1182 dev->stats.rx_crc_errors++; 1183 crc_err = 1; 1184 } 1185 } 1186 if (likely(!crc_err)) { 1187 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) && 1188 (rxstat & RX_STS_LENGTH_ERR_))) 1189 dev->stats.rx_length_errors++; 1190 if (rxstat & RX_STS_MCAST_) 1191 dev->stats.multicast++; 1192 } 1193 } 1194 1195 /* Quickly dumps bad packets */ 1196 static void 1197 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords) 1198 { 1199 if (likely(pktwords >= 4)) { 1200 unsigned int timeout = 500; 1201 unsigned int val; 1202 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_); 1203 do { 1204 udelay(1); 1205 val = smsc911x_reg_read(pdata, RX_DP_CTRL); 1206 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout); 1207 1208 if (unlikely(timeout == 0)) 1209 SMSC_WARN(pdata, hw, "Timed out waiting for " 1210 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val); 1211 } else { 1212 unsigned int temp; 1213 while (pktwords--) 1214 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO); 1215 } 1216 } 1217 1218 /* NAPI poll function */ 1219 static int smsc911x_poll(struct napi_struct *napi, int budget) 1220 { 1221 struct smsc911x_data *pdata = 1222 container_of(napi, struct smsc911x_data, napi); 1223 struct net_device *dev = pdata->dev; 1224 int npackets = 0; 1225 1226 while (npackets < budget) { 1227 unsigned int pktlength; 1228 unsigned int pktwords; 1229 struct sk_buff *skb; 1230 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata); 1231 1232 if (!rxstat) { 1233 unsigned int temp; 1234 /* We processed all packets available. Tell NAPI it can 1235 * stop polling then re-enable rx interrupts */ 1236 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_); 1237 napi_complete(napi); 1238 temp = smsc911x_reg_read(pdata, INT_EN); 1239 temp |= INT_EN_RSFL_EN_; 1240 smsc911x_reg_write(pdata, INT_EN, temp); 1241 break; 1242 } 1243 1244 /* Count packet for NAPI scheduling, even if it has an error. 1245 * Error packets still require cycles to discard */ 1246 npackets++; 1247 1248 pktlength = ((rxstat & 0x3FFF0000) >> 16); 1249 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2; 1250 smsc911x_rx_counterrors(dev, rxstat); 1251 1252 if (unlikely(rxstat & RX_STS_ES_)) { 1253 SMSC_WARN(pdata, rx_err, 1254 "Discarding packet with error bit set"); 1255 /* Packet has an error, discard it and continue with 1256 * the next */ 1257 smsc911x_rx_fastforward(pdata, pktwords); 1258 dev->stats.rx_dropped++; 1259 continue; 1260 } 1261 1262 skb = netdev_alloc_skb(dev, pktwords << 2); 1263 if (unlikely(!skb)) { 1264 SMSC_WARN(pdata, rx_err, 1265 "Unable to allocate skb for rx packet"); 1266 /* Drop the packet and stop this polling iteration */ 1267 smsc911x_rx_fastforward(pdata, pktwords); 1268 dev->stats.rx_dropped++; 1269 break; 1270 } 1271 1272 pdata->ops->rx_readfifo(pdata, 1273 (unsigned int *)skb->data, pktwords); 1274 1275 /* Align IP on 16B boundary */ 1276 skb_reserve(skb, NET_IP_ALIGN); 1277 skb_put(skb, pktlength - 4); 1278 skb->protocol = eth_type_trans(skb, dev); 1279 skb_checksum_none_assert(skb); 1280 netif_receive_skb(skb); 1281 1282 /* Update counters */ 1283 dev->stats.rx_packets++; 1284 dev->stats.rx_bytes += (pktlength - 4); 1285 } 1286 1287 /* Return total received packets */ 1288 return npackets; 1289 } 1290 1291 /* Returns hash bit number for given MAC address 1292 * Example: 1293 * 01 00 5E 00 00 01 -> returns bit number 31 */ 1294 static unsigned int smsc911x_hash(char addr[ETH_ALEN]) 1295 { 1296 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 1297 } 1298 1299 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata) 1300 { 1301 /* Performs the multicast & mac_cr update. This is called when 1302 * safe on the current hardware, and with the mac_lock held */ 1303 unsigned int mac_cr; 1304 1305 SMSC_ASSERT_MAC_LOCK(pdata); 1306 1307 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1308 mac_cr |= pdata->set_bits_mask; 1309 mac_cr &= ~(pdata->clear_bits_mask); 1310 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1311 smsc911x_mac_write(pdata, HASHH, pdata->hashhi); 1312 smsc911x_mac_write(pdata, HASHL, pdata->hashlo); 1313 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X", 1314 mac_cr, pdata->hashhi, pdata->hashlo); 1315 } 1316 1317 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata) 1318 { 1319 unsigned int mac_cr; 1320 1321 /* This function is only called for older LAN911x devices 1322 * (revA or revB), where MAC_CR, HASHH and HASHL should not 1323 * be modified during Rx - newer devices immediately update the 1324 * registers. 1325 * 1326 * This is called from interrupt context */ 1327 1328 spin_lock(&pdata->mac_lock); 1329 1330 /* Check Rx has stopped */ 1331 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_) 1332 SMSC_WARN(pdata, drv, "Rx not stopped"); 1333 1334 /* Perform the update - safe to do now Rx has stopped */ 1335 smsc911x_rx_multicast_update(pdata); 1336 1337 /* Re-enable Rx */ 1338 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1339 mac_cr |= MAC_CR_RXEN_; 1340 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1341 1342 pdata->multicast_update_pending = 0; 1343 1344 spin_unlock(&pdata->mac_lock); 1345 } 1346 1347 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata) 1348 { 1349 struct net_device *ndev = pdata->dev; 1350 struct phy_device *phy_dev = ndev->phydev; 1351 int rc = 0; 1352 1353 if (!phy_dev) 1354 return rc; 1355 1356 /* If the internal PHY is in General Power-Down mode, all, except the 1357 * management interface, is powered-down and stays in that condition as 1358 * long as Phy register bit 0.11 is HIGH. 1359 * 1360 * In that case, clear the bit 0.11, so the PHY powers up and we can 1361 * access to the phy registers. 1362 */ 1363 rc = phy_read(phy_dev, MII_BMCR); 1364 if (rc < 0) { 1365 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1366 return rc; 1367 } 1368 1369 /* If the PHY general power-down bit is not set is not necessary to 1370 * disable the general power down-mode. 1371 */ 1372 if (rc & BMCR_PDOWN) { 1373 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN); 1374 if (rc < 0) { 1375 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1376 return rc; 1377 } 1378 1379 usleep_range(1000, 1500); 1380 } 1381 1382 return 0; 1383 } 1384 1385 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata) 1386 { 1387 struct net_device *ndev = pdata->dev; 1388 struct phy_device *phy_dev = ndev->phydev; 1389 int rc = 0; 1390 1391 if (!phy_dev) 1392 return rc; 1393 1394 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS); 1395 1396 if (rc < 0) { 1397 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1398 return rc; 1399 } 1400 1401 /* Only disable if energy detect mode is already enabled */ 1402 if (rc & MII_LAN83C185_EDPWRDOWN) { 1403 /* Disable energy detect mode for this SMSC Transceivers */ 1404 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS, 1405 rc & (~MII_LAN83C185_EDPWRDOWN)); 1406 1407 if (rc < 0) { 1408 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1409 return rc; 1410 } 1411 /* Allow PHY to wakeup */ 1412 mdelay(2); 1413 } 1414 1415 return 0; 1416 } 1417 1418 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata) 1419 { 1420 struct net_device *ndev = pdata->dev; 1421 struct phy_device *phy_dev = ndev->phydev; 1422 int rc = 0; 1423 1424 if (!phy_dev) 1425 return rc; 1426 1427 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS); 1428 1429 if (rc < 0) { 1430 SMSC_WARN(pdata, drv, "Failed reading PHY control reg"); 1431 return rc; 1432 } 1433 1434 /* Only enable if energy detect mode is already disabled */ 1435 if (!(rc & MII_LAN83C185_EDPWRDOWN)) { 1436 /* Enable energy detect mode for this SMSC Transceivers */ 1437 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS, 1438 rc | MII_LAN83C185_EDPWRDOWN); 1439 1440 if (rc < 0) { 1441 SMSC_WARN(pdata, drv, "Failed writing PHY control reg"); 1442 return rc; 1443 } 1444 } 1445 return 0; 1446 } 1447 1448 static int smsc911x_soft_reset(struct smsc911x_data *pdata) 1449 { 1450 unsigned int timeout; 1451 unsigned int temp; 1452 int ret; 1453 unsigned int reset_offset = HW_CFG; 1454 unsigned int reset_mask = HW_CFG_SRST_; 1455 1456 /* 1457 * Make sure to power-up the PHY chip before doing a reset, otherwise 1458 * the reset fails. 1459 */ 1460 ret = smsc911x_phy_general_power_up(pdata); 1461 if (ret) { 1462 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip"); 1463 return ret; 1464 } 1465 1466 /* 1467 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that 1468 * are initialized in a Energy Detect Power-Down mode that prevents 1469 * the MAC chip to be software reseted. So we have to wakeup the PHY 1470 * before. 1471 */ 1472 if (pdata->generation == 4) { 1473 ret = smsc911x_phy_disable_energy_detect(pdata); 1474 1475 if (ret) { 1476 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1477 return ret; 1478 } 1479 } 1480 1481 if ((pdata->idrev & 0xFFFF0000) == LAN9250) { 1482 /* special reset for LAN9250 */ 1483 reset_offset = RESET_CTL; 1484 reset_mask = RESET_CTL_DIGITAL_RST_; 1485 } 1486 1487 /* Reset the LAN911x */ 1488 smsc911x_reg_write(pdata, reset_offset, reset_mask); 1489 1490 /* verify reset bit is cleared */ 1491 timeout = 10; 1492 do { 1493 udelay(10); 1494 temp = smsc911x_reg_read(pdata, reset_offset); 1495 } while ((--timeout) && (temp & reset_mask)); 1496 1497 if (unlikely(temp & reset_mask)) { 1498 SMSC_WARN(pdata, drv, "Failed to complete reset"); 1499 return -EIO; 1500 } 1501 1502 if (pdata->generation == 4) { 1503 ret = smsc911x_phy_enable_energy_detect(pdata); 1504 1505 if (ret) { 1506 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip"); 1507 return ret; 1508 } 1509 } 1510 1511 return 0; 1512 } 1513 1514 /* Sets the device MAC address to dev_addr, called with mac_lock held */ 1515 static void 1516 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6]) 1517 { 1518 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; 1519 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | 1520 (dev_addr[1] << 8) | dev_addr[0]; 1521 1522 SMSC_ASSERT_MAC_LOCK(pdata); 1523 1524 smsc911x_mac_write(pdata, ADDRH, mac_high16); 1525 smsc911x_mac_write(pdata, ADDRL, mac_low32); 1526 } 1527 1528 static void smsc911x_disable_irq_chip(struct net_device *dev) 1529 { 1530 struct smsc911x_data *pdata = netdev_priv(dev); 1531 1532 smsc911x_reg_write(pdata, INT_EN, 0); 1533 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 1534 } 1535 1536 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id) 1537 { 1538 struct net_device *dev = dev_id; 1539 struct smsc911x_data *pdata = netdev_priv(dev); 1540 u32 intsts = smsc911x_reg_read(pdata, INT_STS); 1541 u32 inten = smsc911x_reg_read(pdata, INT_EN); 1542 int serviced = IRQ_NONE; 1543 u32 temp; 1544 1545 if (unlikely(intsts & inten & INT_STS_SW_INT_)) { 1546 temp = smsc911x_reg_read(pdata, INT_EN); 1547 temp &= (~INT_EN_SW_INT_EN_); 1548 smsc911x_reg_write(pdata, INT_EN, temp); 1549 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_); 1550 pdata->software_irq_signal = 1; 1551 smp_wmb(); 1552 serviced = IRQ_HANDLED; 1553 } 1554 1555 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) { 1556 /* Called when there is a multicast update scheduled and 1557 * it is now safe to complete the update */ 1558 SMSC_TRACE(pdata, intr, "RX Stop interrupt"); 1559 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_); 1560 if (pdata->multicast_update_pending) 1561 smsc911x_rx_multicast_update_workaround(pdata); 1562 serviced = IRQ_HANDLED; 1563 } 1564 1565 if (intsts & inten & INT_STS_TDFA_) { 1566 temp = smsc911x_reg_read(pdata, FIFO_INT); 1567 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1568 smsc911x_reg_write(pdata, FIFO_INT, temp); 1569 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_); 1570 netif_wake_queue(dev); 1571 serviced = IRQ_HANDLED; 1572 } 1573 1574 if (unlikely(intsts & inten & INT_STS_RXE_)) { 1575 SMSC_TRACE(pdata, intr, "RX Error interrupt"); 1576 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_); 1577 serviced = IRQ_HANDLED; 1578 } 1579 1580 if (likely(intsts & inten & INT_STS_RSFL_)) { 1581 if (likely(napi_schedule_prep(&pdata->napi))) { 1582 /* Disable Rx interrupts */ 1583 temp = smsc911x_reg_read(pdata, INT_EN); 1584 temp &= (~INT_EN_RSFL_EN_); 1585 smsc911x_reg_write(pdata, INT_EN, temp); 1586 /* Schedule a NAPI poll */ 1587 __napi_schedule(&pdata->napi); 1588 } else { 1589 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed"); 1590 } 1591 serviced = IRQ_HANDLED; 1592 } 1593 1594 return serviced; 1595 } 1596 1597 static int smsc911x_open(struct net_device *dev) 1598 { 1599 struct smsc911x_data *pdata = netdev_priv(dev); 1600 unsigned int timeout; 1601 unsigned int temp; 1602 unsigned int intcfg; 1603 int retval; 1604 int irq_flags; 1605 1606 /* find and start the given phy */ 1607 if (!dev->phydev) { 1608 retval = smsc911x_mii_probe(dev); 1609 if (retval < 0) { 1610 SMSC_WARN(pdata, probe, "Error starting phy"); 1611 goto out; 1612 } 1613 } 1614 1615 /* Reset the LAN911x */ 1616 retval = smsc911x_soft_reset(pdata); 1617 if (retval) { 1618 SMSC_WARN(pdata, hw, "soft reset failed"); 1619 goto mii_free_out; 1620 } 1621 1622 smsc911x_reg_write(pdata, HW_CFG, 0x00050000); 1623 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); 1624 1625 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ 1626 spin_lock_irq(&pdata->mac_lock); 1627 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); 1628 spin_unlock_irq(&pdata->mac_lock); 1629 1630 /* Make sure EEPROM has finished loading before setting GPIO_CFG */ 1631 timeout = 50; 1632 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && 1633 --timeout) { 1634 udelay(10); 1635 } 1636 1637 if (unlikely(timeout == 0)) 1638 SMSC_WARN(pdata, ifup, 1639 "Timed out waiting for EEPROM busy bit to clear"); 1640 1641 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000); 1642 1643 /* The soft reset above cleared the device's MAC address, 1644 * restore it from local copy (set in probe) */ 1645 spin_lock_irq(&pdata->mac_lock); 1646 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1647 spin_unlock_irq(&pdata->mac_lock); 1648 1649 /* Initialise irqs, but leave all sources disabled */ 1650 smsc911x_disable_irq_chip(dev); 1651 1652 /* Set interrupt deassertion to 100uS */ 1653 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_); 1654 1655 if (pdata->config.irq_polarity) { 1656 SMSC_TRACE(pdata, ifup, "irq polarity: active high"); 1657 intcfg |= INT_CFG_IRQ_POL_; 1658 } else { 1659 SMSC_TRACE(pdata, ifup, "irq polarity: active low"); 1660 } 1661 1662 if (pdata->config.irq_type) { 1663 SMSC_TRACE(pdata, ifup, "irq type: push-pull"); 1664 intcfg |= INT_CFG_IRQ_TYPE_; 1665 } else { 1666 SMSC_TRACE(pdata, ifup, "irq type: open drain"); 1667 } 1668 1669 smsc911x_reg_write(pdata, INT_CFG, intcfg); 1670 1671 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq); 1672 pdata->software_irq_signal = 0; 1673 smp_wmb(); 1674 1675 irq_flags = irq_get_trigger_type(dev->irq); 1676 retval = request_irq(dev->irq, smsc911x_irqhandler, 1677 irq_flags | IRQF_SHARED, dev->name, dev); 1678 if (retval) { 1679 SMSC_WARN(pdata, probe, 1680 "Unable to claim requested irq: %d", dev->irq); 1681 goto mii_free_out; 1682 } 1683 1684 temp = smsc911x_reg_read(pdata, INT_EN); 1685 temp |= INT_EN_SW_INT_EN_; 1686 smsc911x_reg_write(pdata, INT_EN, temp); 1687 1688 timeout = 1000; 1689 while (timeout--) { 1690 if (pdata->software_irq_signal) 1691 break; 1692 msleep(1); 1693 } 1694 1695 if (!pdata->software_irq_signal) { 1696 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n", 1697 dev->irq); 1698 retval = -ENODEV; 1699 goto irq_stop_out; 1700 } 1701 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d", 1702 dev->irq); 1703 1704 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n", 1705 (unsigned long)pdata->ioaddr, dev->irq); 1706 1707 /* Reset the last known duplex and carrier */ 1708 pdata->last_duplex = -1; 1709 pdata->last_carrier = -1; 1710 1711 /* Bring the PHY up */ 1712 phy_start(dev->phydev); 1713 1714 temp = smsc911x_reg_read(pdata, HW_CFG); 1715 /* Preserve TX FIFO size and external PHY configuration */ 1716 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF); 1717 temp |= HW_CFG_SF_; 1718 smsc911x_reg_write(pdata, HW_CFG, temp); 1719 1720 temp = smsc911x_reg_read(pdata, FIFO_INT); 1721 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1722 temp &= ~(FIFO_INT_RX_STS_LEVEL_); 1723 smsc911x_reg_write(pdata, FIFO_INT, temp); 1724 1725 /* set RX Data offset to 2 bytes for alignment */ 1726 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8)); 1727 1728 /* enable NAPI polling before enabling RX interrupts */ 1729 napi_enable(&pdata->napi); 1730 1731 temp = smsc911x_reg_read(pdata, INT_EN); 1732 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_); 1733 smsc911x_reg_write(pdata, INT_EN, temp); 1734 1735 spin_lock_irq(&pdata->mac_lock); 1736 temp = smsc911x_mac_read(pdata, MAC_CR); 1737 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_); 1738 smsc911x_mac_write(pdata, MAC_CR, temp); 1739 spin_unlock_irq(&pdata->mac_lock); 1740 1741 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 1742 1743 netif_start_queue(dev); 1744 return 0; 1745 1746 irq_stop_out: 1747 free_irq(dev->irq, dev); 1748 mii_free_out: 1749 phy_disconnect(dev->phydev); 1750 dev->phydev = NULL; 1751 out: 1752 return retval; 1753 } 1754 1755 /* Entry point for stopping the interface */ 1756 static int smsc911x_stop(struct net_device *dev) 1757 { 1758 struct smsc911x_data *pdata = netdev_priv(dev); 1759 unsigned int temp; 1760 1761 /* Disable all device interrupts */ 1762 temp = smsc911x_reg_read(pdata, INT_CFG); 1763 temp &= ~INT_CFG_IRQ_EN_; 1764 smsc911x_reg_write(pdata, INT_CFG, temp); 1765 1766 /* Stop Tx and Rx polling */ 1767 netif_stop_queue(dev); 1768 napi_disable(&pdata->napi); 1769 1770 /* At this point all Rx and Tx activity is stopped */ 1771 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1772 smsc911x_tx_update_txcounters(dev); 1773 1774 free_irq(dev->irq, dev); 1775 1776 /* Bring the PHY down */ 1777 if (dev->phydev) { 1778 phy_stop(dev->phydev); 1779 phy_disconnect(dev->phydev); 1780 dev->phydev = NULL; 1781 } 1782 netif_carrier_off(dev); 1783 1784 SMSC_TRACE(pdata, ifdown, "Interface stopped"); 1785 return 0; 1786 } 1787 1788 /* Entry point for transmitting a packet */ 1789 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 1790 { 1791 struct smsc911x_data *pdata = netdev_priv(dev); 1792 unsigned int freespace; 1793 unsigned int tx_cmd_a; 1794 unsigned int tx_cmd_b; 1795 unsigned int temp; 1796 u32 wrsz; 1797 ulong bufp; 1798 1799 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_; 1800 1801 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD)) 1802 SMSC_WARN(pdata, tx_err, 1803 "Tx data fifo low, space available: %d", freespace); 1804 1805 /* Word alignment adjustment */ 1806 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16; 1807 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1808 tx_cmd_a |= (unsigned int)skb->len; 1809 1810 tx_cmd_b = ((unsigned int)skb->len) << 16; 1811 tx_cmd_b |= (unsigned int)skb->len; 1812 1813 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a); 1814 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b); 1815 1816 bufp = (ulong)skb->data & (~0x3); 1817 wrsz = (u32)skb->len + 3; 1818 wrsz += (u32)((ulong)skb->data & 0x3); 1819 wrsz >>= 2; 1820 1821 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 1822 freespace -= (skb->len + 32); 1823 skb_tx_timestamp(skb); 1824 dev_consume_skb_any(skb); 1825 1826 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30)) 1827 smsc911x_tx_update_txcounters(dev); 1828 1829 if (freespace < TX_FIFO_LOW_THRESHOLD) { 1830 netif_stop_queue(dev); 1831 temp = smsc911x_reg_read(pdata, FIFO_INT); 1832 temp &= 0x00FFFFFF; 1833 temp |= 0x32000000; 1834 smsc911x_reg_write(pdata, FIFO_INT, temp); 1835 } 1836 1837 return NETDEV_TX_OK; 1838 } 1839 1840 /* Entry point for getting status counters */ 1841 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev) 1842 { 1843 struct smsc911x_data *pdata = netdev_priv(dev); 1844 smsc911x_tx_update_txcounters(dev); 1845 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1846 return &dev->stats; 1847 } 1848 1849 /* Entry point for setting addressing modes */ 1850 static void smsc911x_set_multicast_list(struct net_device *dev) 1851 { 1852 struct smsc911x_data *pdata = netdev_priv(dev); 1853 unsigned long flags; 1854 1855 if (dev->flags & IFF_PROMISC) { 1856 /* Enabling promiscuous mode */ 1857 pdata->set_bits_mask = MAC_CR_PRMS_; 1858 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1859 pdata->hashhi = 0; 1860 pdata->hashlo = 0; 1861 } else if (dev->flags & IFF_ALLMULTI) { 1862 /* Enabling all multicast mode */ 1863 pdata->set_bits_mask = MAC_CR_MCPAS_; 1864 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_); 1865 pdata->hashhi = 0; 1866 pdata->hashlo = 0; 1867 } else if (!netdev_mc_empty(dev)) { 1868 /* Enabling specific multicast addresses */ 1869 unsigned int hash_high = 0; 1870 unsigned int hash_low = 0; 1871 struct netdev_hw_addr *ha; 1872 1873 pdata->set_bits_mask = MAC_CR_HPFILT_; 1874 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_); 1875 1876 netdev_for_each_mc_addr(ha, dev) { 1877 unsigned int bitnum = smsc911x_hash(ha->addr); 1878 unsigned int mask = 0x01 << (bitnum & 0x1F); 1879 1880 if (bitnum & 0x20) 1881 hash_high |= mask; 1882 else 1883 hash_low |= mask; 1884 } 1885 1886 pdata->hashhi = hash_high; 1887 pdata->hashlo = hash_low; 1888 } else { 1889 /* Enabling local MAC address only */ 1890 pdata->set_bits_mask = 0; 1891 pdata->clear_bits_mask = 1892 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1893 pdata->hashhi = 0; 1894 pdata->hashlo = 0; 1895 } 1896 1897 spin_lock_irqsave(&pdata->mac_lock, flags); 1898 1899 if (pdata->generation <= 1) { 1900 /* Older hardware revision - cannot change these flags while 1901 * receiving data */ 1902 if (!pdata->multicast_update_pending) { 1903 unsigned int temp; 1904 SMSC_TRACE(pdata, hw, "scheduling mcast update"); 1905 pdata->multicast_update_pending = 1; 1906 1907 /* Request the hardware to stop, then perform the 1908 * update when we get an RX_STOP interrupt */ 1909 temp = smsc911x_mac_read(pdata, MAC_CR); 1910 temp &= ~(MAC_CR_RXEN_); 1911 smsc911x_mac_write(pdata, MAC_CR, temp); 1912 } else { 1913 /* There is another update pending, this should now 1914 * use the newer values */ 1915 } 1916 } else { 1917 /* Newer hardware revision - can write immediately */ 1918 smsc911x_rx_multicast_update(pdata); 1919 } 1920 1921 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1922 } 1923 1924 #ifdef CONFIG_NET_POLL_CONTROLLER 1925 static void smsc911x_poll_controller(struct net_device *dev) 1926 { 1927 disable_irq(dev->irq); 1928 smsc911x_irqhandler(0, dev); 1929 enable_irq(dev->irq); 1930 } 1931 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1932 1933 static int smsc911x_set_mac_address(struct net_device *dev, void *p) 1934 { 1935 struct smsc911x_data *pdata = netdev_priv(dev); 1936 struct sockaddr *addr = p; 1937 1938 /* On older hardware revisions we cannot change the mac address 1939 * registers while receiving data. Newer devices can safely change 1940 * this at any time. */ 1941 if (pdata->generation <= 1 && netif_running(dev)) 1942 return -EBUSY; 1943 1944 if (!is_valid_ether_addr(addr->sa_data)) 1945 return -EADDRNOTAVAIL; 1946 1947 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 1948 1949 spin_lock_irq(&pdata->mac_lock); 1950 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1951 spin_unlock_irq(&pdata->mac_lock); 1952 1953 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 1954 1955 return 0; 1956 } 1957 1958 /* Standard ioctls for mii-tool */ 1959 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1960 { 1961 if (!netif_running(dev) || !dev->phydev) 1962 return -EINVAL; 1963 1964 return phy_mii_ioctl(dev->phydev, ifr, cmd); 1965 } 1966 1967 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev, 1968 struct ethtool_drvinfo *info) 1969 { 1970 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver)); 1971 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version)); 1972 strlcpy(info->bus_info, dev_name(dev->dev.parent), 1973 sizeof(info->bus_info)); 1974 } 1975 1976 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev) 1977 { 1978 struct smsc911x_data *pdata = netdev_priv(dev); 1979 return pdata->msg_enable; 1980 } 1981 1982 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level) 1983 { 1984 struct smsc911x_data *pdata = netdev_priv(dev); 1985 pdata->msg_enable = level; 1986 } 1987 1988 static int smsc911x_ethtool_getregslen(struct net_device *dev) 1989 { 1990 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) * 1991 sizeof(u32); 1992 } 1993 1994 static void 1995 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, 1996 void *buf) 1997 { 1998 struct smsc911x_data *pdata = netdev_priv(dev); 1999 struct phy_device *phy_dev = dev->phydev; 2000 unsigned long flags; 2001 unsigned int i; 2002 unsigned int j = 0; 2003 u32 *data = buf; 2004 2005 regs->version = pdata->idrev; 2006 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32))) 2007 data[j++] = smsc911x_reg_read(pdata, i); 2008 2009 for (i = MAC_CR; i <= WUCSR; i++) { 2010 spin_lock_irqsave(&pdata->mac_lock, flags); 2011 data[j++] = smsc911x_mac_read(pdata, i); 2012 spin_unlock_irqrestore(&pdata->mac_lock, flags); 2013 } 2014 2015 for (i = 0; i <= 31; i++) 2016 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus, 2017 phy_dev->mdio.addr, i); 2018 } 2019 2020 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata) 2021 { 2022 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG); 2023 temp &= ~GPIO_CFG_EEPR_EN_; 2024 smsc911x_reg_write(pdata, GPIO_CFG, temp); 2025 msleep(1); 2026 } 2027 2028 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op) 2029 { 2030 int timeout = 100; 2031 u32 e2cmd; 2032 2033 SMSC_TRACE(pdata, drv, "op 0x%08x", op); 2034 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) { 2035 SMSC_WARN(pdata, drv, "Busy at start"); 2036 return -EBUSY; 2037 } 2038 2039 e2cmd = op | E2P_CMD_EPC_BUSY_; 2040 smsc911x_reg_write(pdata, E2P_CMD, e2cmd); 2041 2042 do { 2043 msleep(1); 2044 e2cmd = smsc911x_reg_read(pdata, E2P_CMD); 2045 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); 2046 2047 if (!timeout) { 2048 SMSC_TRACE(pdata, drv, "TIMED OUT"); 2049 return -EAGAIN; 2050 } 2051 2052 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { 2053 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation"); 2054 return -EINVAL; 2055 } 2056 2057 return 0; 2058 } 2059 2060 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata, 2061 u8 address, u8 *data) 2062 { 2063 u32 op = E2P_CMD_EPC_CMD_READ_ | address; 2064 int ret; 2065 2066 SMSC_TRACE(pdata, drv, "address 0x%x", address); 2067 ret = smsc911x_eeprom_send_cmd(pdata, op); 2068 2069 if (!ret) 2070 data[address] = smsc911x_reg_read(pdata, E2P_DATA); 2071 2072 return ret; 2073 } 2074 2075 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata, 2076 u8 address, u8 data) 2077 { 2078 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; 2079 u32 temp; 2080 int ret; 2081 2082 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data); 2083 ret = smsc911x_eeprom_send_cmd(pdata, op); 2084 2085 if (!ret) { 2086 op = E2P_CMD_EPC_CMD_WRITE_ | address; 2087 smsc911x_reg_write(pdata, E2P_DATA, (u32)data); 2088 2089 /* Workaround for hardware read-after-write restriction */ 2090 temp = smsc911x_reg_read(pdata, BYTE_TEST); 2091 2092 ret = smsc911x_eeprom_send_cmd(pdata, op); 2093 } 2094 2095 return ret; 2096 } 2097 2098 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev) 2099 { 2100 return SMSC911X_EEPROM_SIZE; 2101 } 2102 2103 static int smsc911x_ethtool_get_eeprom(struct net_device *dev, 2104 struct ethtool_eeprom *eeprom, u8 *data) 2105 { 2106 struct smsc911x_data *pdata = netdev_priv(dev); 2107 u8 eeprom_data[SMSC911X_EEPROM_SIZE]; 2108 int len; 2109 int i; 2110 2111 smsc911x_eeprom_enable_access(pdata); 2112 2113 len = min(eeprom->len, SMSC911X_EEPROM_SIZE); 2114 for (i = 0; i < len; i++) { 2115 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data); 2116 if (ret < 0) { 2117 eeprom->len = 0; 2118 return ret; 2119 } 2120 } 2121 2122 memcpy(data, &eeprom_data[eeprom->offset], len); 2123 eeprom->len = len; 2124 return 0; 2125 } 2126 2127 static int smsc911x_ethtool_set_eeprom(struct net_device *dev, 2128 struct ethtool_eeprom *eeprom, u8 *data) 2129 { 2130 int ret; 2131 struct smsc911x_data *pdata = netdev_priv(dev); 2132 2133 smsc911x_eeprom_enable_access(pdata); 2134 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_); 2135 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data); 2136 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_); 2137 2138 /* Single byte write, according to man page */ 2139 eeprom->len = 1; 2140 2141 return ret; 2142 } 2143 2144 static const struct ethtool_ops smsc911x_ethtool_ops = { 2145 .get_link = ethtool_op_get_link, 2146 .get_drvinfo = smsc911x_ethtool_getdrvinfo, 2147 .nway_reset = phy_ethtool_nway_reset, 2148 .get_msglevel = smsc911x_ethtool_getmsglevel, 2149 .set_msglevel = smsc911x_ethtool_setmsglevel, 2150 .get_regs_len = smsc911x_ethtool_getregslen, 2151 .get_regs = smsc911x_ethtool_getregs, 2152 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len, 2153 .get_eeprom = smsc911x_ethtool_get_eeprom, 2154 .set_eeprom = smsc911x_ethtool_set_eeprom, 2155 .get_ts_info = ethtool_op_get_ts_info, 2156 .get_link_ksettings = phy_ethtool_get_link_ksettings, 2157 .set_link_ksettings = phy_ethtool_set_link_ksettings, 2158 }; 2159 2160 static const struct net_device_ops smsc911x_netdev_ops = { 2161 .ndo_open = smsc911x_open, 2162 .ndo_stop = smsc911x_stop, 2163 .ndo_start_xmit = smsc911x_hard_start_xmit, 2164 .ndo_get_stats = smsc911x_get_stats, 2165 .ndo_set_rx_mode = smsc911x_set_multicast_list, 2166 .ndo_do_ioctl = smsc911x_do_ioctl, 2167 .ndo_validate_addr = eth_validate_addr, 2168 .ndo_set_mac_address = smsc911x_set_mac_address, 2169 #ifdef CONFIG_NET_POLL_CONTROLLER 2170 .ndo_poll_controller = smsc911x_poll_controller, 2171 #endif 2172 }; 2173 2174 /* copies the current mac address from hardware to dev->dev_addr */ 2175 static void smsc911x_read_mac_address(struct net_device *dev) 2176 { 2177 struct smsc911x_data *pdata = netdev_priv(dev); 2178 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); 2179 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); 2180 2181 dev->dev_addr[0] = (u8)(mac_low32); 2182 dev->dev_addr[1] = (u8)(mac_low32 >> 8); 2183 dev->dev_addr[2] = (u8)(mac_low32 >> 16); 2184 dev->dev_addr[3] = (u8)(mac_low32 >> 24); 2185 dev->dev_addr[4] = (u8)(mac_high16); 2186 dev->dev_addr[5] = (u8)(mac_high16 >> 8); 2187 } 2188 2189 /* Initializing private device structures, only called from probe */ 2190 static int smsc911x_init(struct net_device *dev) 2191 { 2192 struct smsc911x_data *pdata = netdev_priv(dev); 2193 unsigned int byte_test, mask; 2194 unsigned int to = 100; 2195 2196 SMSC_TRACE(pdata, probe, "Driver Parameters:"); 2197 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX", 2198 (unsigned long)pdata->ioaddr); 2199 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq); 2200 SMSC_TRACE(pdata, probe, "PHY will be autodetected."); 2201 2202 spin_lock_init(&pdata->dev_lock); 2203 spin_lock_init(&pdata->mac_lock); 2204 2205 if (pdata->ioaddr == NULL) { 2206 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000"); 2207 return -ENODEV; 2208 } 2209 2210 /* 2211 * poll the READY bit in PMT_CTRL. Any other access to the device is 2212 * forbidden while this bit isn't set. Try for 100ms 2213 * 2214 * Note that this test is done before the WORD_SWAP register is 2215 * programmed. So in some configurations the READY bit is at 16 before 2216 * WORD_SWAP is written to. This issue is worked around by waiting 2217 * until either bit 0 or bit 16 gets set in PMT_CTRL. 2218 * 2219 * SMSC has confirmed that checking bit 16 (marked as reserved in 2220 * the datasheet) is fine since these bits "will either never be set 2221 * or can only go high after READY does (so also indicate the device 2222 * is ready)". 2223 */ 2224 2225 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_); 2226 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to) 2227 udelay(1000); 2228 2229 if (to == 0) { 2230 netdev_err(dev, "Device not READY in 100ms aborting\n"); 2231 return -ENODEV; 2232 } 2233 2234 /* Check byte ordering */ 2235 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2236 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test); 2237 if (byte_test == 0x43218765) { 2238 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, " 2239 "applying WORD_SWAP"); 2240 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff); 2241 2242 /* 1 dummy read of BYTE_TEST is needed after a write to 2243 * WORD_SWAP before its contents are valid */ 2244 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2245 2246 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 2247 } 2248 2249 if (byte_test != 0x87654321) { 2250 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test); 2251 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) { 2252 SMSC_WARN(pdata, probe, 2253 "top 16 bits equal to bottom 16 bits"); 2254 SMSC_TRACE(pdata, probe, 2255 "This may mean the chip is set " 2256 "for 32 bit while the bus is reading 16 bit"); 2257 } 2258 return -ENODEV; 2259 } 2260 2261 /* Default generation to zero (all workarounds apply) */ 2262 pdata->generation = 0; 2263 2264 pdata->idrev = smsc911x_reg_read(pdata, ID_REV); 2265 switch (pdata->idrev & 0xFFFF0000) { 2266 case LAN9118: 2267 case LAN9117: 2268 case LAN9116: 2269 case LAN9115: 2270 case LAN89218: 2271 /* LAN911[5678] family */ 2272 pdata->generation = pdata->idrev & 0x0000FFFF; 2273 break; 2274 2275 case LAN9218: 2276 case LAN9217: 2277 case LAN9216: 2278 case LAN9215: 2279 /* LAN921[5678] family */ 2280 pdata->generation = 3; 2281 break; 2282 2283 case LAN9210: 2284 case LAN9211: 2285 case LAN9220: 2286 case LAN9221: 2287 case LAN9250: 2288 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */ 2289 pdata->generation = 4; 2290 break; 2291 2292 default: 2293 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X", 2294 pdata->idrev); 2295 return -ENODEV; 2296 } 2297 2298 SMSC_TRACE(pdata, probe, 2299 "LAN911x identified, idrev: 0x%08X, generation: %d", 2300 pdata->idrev, pdata->generation); 2301 2302 if (pdata->generation == 0) 2303 SMSC_WARN(pdata, probe, 2304 "This driver is not intended for this chip revision"); 2305 2306 /* workaround for platforms without an eeprom, where the mac address 2307 * is stored elsewhere and set by the bootloader. This saves the 2308 * mac address before resetting the device */ 2309 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { 2310 spin_lock_irq(&pdata->mac_lock); 2311 smsc911x_read_mac_address(dev); 2312 spin_unlock_irq(&pdata->mac_lock); 2313 } 2314 2315 /* Reset the LAN911x */ 2316 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata)) 2317 return -ENODEV; 2318 2319 dev->flags |= IFF_MULTICAST; 2320 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT); 2321 dev->netdev_ops = &smsc911x_netdev_ops; 2322 dev->ethtool_ops = &smsc911x_ethtool_ops; 2323 2324 return 0; 2325 } 2326 2327 static int smsc911x_drv_remove(struct platform_device *pdev) 2328 { 2329 struct net_device *dev; 2330 struct smsc911x_data *pdata; 2331 struct resource *res; 2332 2333 dev = platform_get_drvdata(pdev); 2334 BUG_ON(!dev); 2335 pdata = netdev_priv(dev); 2336 BUG_ON(!pdata); 2337 BUG_ON(!pdata->ioaddr); 2338 2339 SMSC_TRACE(pdata, ifdown, "Stopping driver"); 2340 2341 unregister_netdev(dev); 2342 2343 mdiobus_unregister(pdata->mii_bus); 2344 mdiobus_free(pdata->mii_bus); 2345 2346 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2347 "smsc911x-memory"); 2348 if (!res) 2349 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2350 2351 release_mem_region(res->start, resource_size(res)); 2352 2353 iounmap(pdata->ioaddr); 2354 2355 (void)smsc911x_disable_resources(pdev); 2356 smsc911x_free_resources(pdev); 2357 2358 free_netdev(dev); 2359 2360 pm_runtime_put(&pdev->dev); 2361 pm_runtime_disable(&pdev->dev); 2362 2363 return 0; 2364 } 2365 2366 /* standard register acces */ 2367 static const struct smsc911x_ops standard_smsc911x_ops = { 2368 .reg_read = __smsc911x_reg_read, 2369 .reg_write = __smsc911x_reg_write, 2370 .rx_readfifo = smsc911x_rx_readfifo, 2371 .tx_writefifo = smsc911x_tx_writefifo, 2372 }; 2373 2374 /* shifted register access */ 2375 static const struct smsc911x_ops shifted_smsc911x_ops = { 2376 .reg_read = __smsc911x_reg_read_shift, 2377 .reg_write = __smsc911x_reg_write_shift, 2378 .rx_readfifo = smsc911x_rx_readfifo_shift, 2379 .tx_writefifo = smsc911x_tx_writefifo_shift, 2380 }; 2381 2382 static int smsc911x_probe_config(struct smsc911x_platform_config *config, 2383 struct device *dev) 2384 { 2385 int phy_interface; 2386 u32 width = 0; 2387 int err; 2388 2389 phy_interface = device_get_phy_mode(dev); 2390 if (phy_interface < 0) 2391 phy_interface = PHY_INTERFACE_MODE_NA; 2392 config->phy_interface = phy_interface; 2393 2394 device_get_mac_address(dev, config->mac, ETH_ALEN); 2395 2396 err = device_property_read_u32(dev, "reg-io-width", &width); 2397 if (err == -ENXIO) 2398 return err; 2399 if (!err && width == 4) 2400 config->flags |= SMSC911X_USE_32BIT; 2401 else 2402 config->flags |= SMSC911X_USE_16BIT; 2403 2404 device_property_read_u32(dev, "reg-shift", &config->shift); 2405 2406 if (device_property_present(dev, "smsc,irq-active-high")) 2407 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH; 2408 2409 if (device_property_present(dev, "smsc,irq-push-pull")) 2410 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL; 2411 2412 if (device_property_present(dev, "smsc,force-internal-phy")) 2413 config->flags |= SMSC911X_FORCE_INTERNAL_PHY; 2414 2415 if (device_property_present(dev, "smsc,force-external-phy")) 2416 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY; 2417 2418 if (device_property_present(dev, "smsc,save-mac-address")) 2419 config->flags |= SMSC911X_SAVE_MAC_ADDRESS; 2420 2421 return 0; 2422 } 2423 2424 static int smsc911x_drv_probe(struct platform_device *pdev) 2425 { 2426 struct net_device *dev; 2427 struct smsc911x_data *pdata; 2428 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev); 2429 struct resource *res; 2430 int res_size, irq; 2431 int retval; 2432 2433 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2434 "smsc911x-memory"); 2435 if (!res) 2436 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2437 if (!res) { 2438 pr_warn("Could not allocate resource\n"); 2439 retval = -ENODEV; 2440 goto out_0; 2441 } 2442 res_size = resource_size(res); 2443 2444 irq = platform_get_irq(pdev, 0); 2445 if (irq == -EPROBE_DEFER) { 2446 retval = -EPROBE_DEFER; 2447 goto out_0; 2448 } else if (irq <= 0) { 2449 pr_warn("Could not allocate irq resource\n"); 2450 retval = -ENODEV; 2451 goto out_0; 2452 } 2453 2454 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) { 2455 retval = -EBUSY; 2456 goto out_0; 2457 } 2458 2459 dev = alloc_etherdev(sizeof(struct smsc911x_data)); 2460 if (!dev) { 2461 retval = -ENOMEM; 2462 goto out_release_io_1; 2463 } 2464 2465 SET_NETDEV_DEV(dev, &pdev->dev); 2466 2467 pdata = netdev_priv(dev); 2468 dev->irq = irq; 2469 pdata->ioaddr = ioremap_nocache(res->start, res_size); 2470 if (!pdata->ioaddr) { 2471 retval = -ENOMEM; 2472 goto out_ioremap_fail; 2473 } 2474 2475 pdata->dev = dev; 2476 pdata->msg_enable = ((1 << debug) - 1); 2477 2478 platform_set_drvdata(pdev, dev); 2479 2480 retval = smsc911x_request_resources(pdev); 2481 if (retval) 2482 goto out_request_resources_fail; 2483 2484 retval = smsc911x_enable_resources(pdev); 2485 if (retval) 2486 goto out_enable_resources_fail; 2487 2488 if (pdata->ioaddr == NULL) { 2489 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid"); 2490 retval = -ENOMEM; 2491 goto out_disable_resources; 2492 } 2493 2494 retval = smsc911x_probe_config(&pdata->config, &pdev->dev); 2495 if (retval && config) { 2496 /* copy config parameters across to pdata */ 2497 memcpy(&pdata->config, config, sizeof(pdata->config)); 2498 retval = 0; 2499 } 2500 2501 if (retval) { 2502 SMSC_WARN(pdata, probe, "Error smsc911x config not found"); 2503 goto out_disable_resources; 2504 } 2505 2506 /* assume standard, non-shifted, access to HW registers */ 2507 pdata->ops = &standard_smsc911x_ops; 2508 /* apply the right access if shifting is needed */ 2509 if (pdata->config.shift) 2510 pdata->ops = &shifted_smsc911x_ops; 2511 2512 pm_runtime_enable(&pdev->dev); 2513 pm_runtime_get_sync(&pdev->dev); 2514 2515 retval = smsc911x_init(dev); 2516 if (retval < 0) 2517 goto out_disable_resources; 2518 2519 netif_carrier_off(dev); 2520 2521 retval = smsc911x_mii_init(pdev, dev); 2522 if (retval) { 2523 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval); 2524 goto out_disable_resources; 2525 } 2526 2527 retval = register_netdev(dev); 2528 if (retval) { 2529 SMSC_WARN(pdata, probe, "Error %i registering device", retval); 2530 goto out_disable_resources; 2531 } else { 2532 SMSC_TRACE(pdata, probe, 2533 "Network interface: \"%s\"", dev->name); 2534 } 2535 2536 spin_lock_irq(&pdata->mac_lock); 2537 2538 /* Check if mac address has been specified when bringing interface up */ 2539 if (is_valid_ether_addr(dev->dev_addr)) { 2540 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2541 SMSC_TRACE(pdata, probe, 2542 "MAC Address is specified by configuration"); 2543 } else if (is_valid_ether_addr(pdata->config.mac)) { 2544 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN); 2545 SMSC_TRACE(pdata, probe, 2546 "MAC Address specified by platform data"); 2547 } else { 2548 /* Try reading mac address from device. if EEPROM is present 2549 * it will already have been set */ 2550 smsc_get_mac(dev); 2551 2552 if (is_valid_ether_addr(dev->dev_addr)) { 2553 /* eeprom values are valid so use them */ 2554 SMSC_TRACE(pdata, probe, 2555 "Mac Address is read from LAN911x EEPROM"); 2556 } else { 2557 /* eeprom values are invalid, generate random MAC */ 2558 eth_hw_addr_random(dev); 2559 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2560 SMSC_TRACE(pdata, probe, 2561 "MAC Address is set to eth_random_addr"); 2562 } 2563 } 2564 2565 spin_unlock_irq(&pdata->mac_lock); 2566 2567 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 2568 2569 return 0; 2570 2571 out_disable_resources: 2572 pm_runtime_put(&pdev->dev); 2573 pm_runtime_disable(&pdev->dev); 2574 (void)smsc911x_disable_resources(pdev); 2575 out_enable_resources_fail: 2576 smsc911x_free_resources(pdev); 2577 out_request_resources_fail: 2578 iounmap(pdata->ioaddr); 2579 out_ioremap_fail: 2580 free_netdev(dev); 2581 out_release_io_1: 2582 release_mem_region(res->start, resource_size(res)); 2583 out_0: 2584 return retval; 2585 } 2586 2587 #ifdef CONFIG_PM 2588 /* This implementation assumes the devices remains powered on its VDDVARIO 2589 * pins during suspend. */ 2590 2591 /* TODO: implement freeze/thaw callbacks for hibernation.*/ 2592 2593 static int smsc911x_suspend(struct device *dev) 2594 { 2595 struct net_device *ndev = dev_get_drvdata(dev); 2596 struct smsc911x_data *pdata = netdev_priv(ndev); 2597 2598 if (netif_running(ndev)) { 2599 netif_stop_queue(ndev); 2600 netif_device_detach(ndev); 2601 } 2602 2603 /* enable wake on LAN, energy detection and the external PME 2604 * signal. */ 2605 smsc911x_reg_write(pdata, PMT_CTRL, 2606 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ | 2607 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_); 2608 2609 pm_runtime_disable(dev); 2610 pm_runtime_set_suspended(dev); 2611 2612 return 0; 2613 } 2614 2615 static int smsc911x_resume(struct device *dev) 2616 { 2617 struct net_device *ndev = dev_get_drvdata(dev); 2618 struct smsc911x_data *pdata = netdev_priv(ndev); 2619 unsigned int to = 100; 2620 2621 pm_runtime_enable(dev); 2622 pm_runtime_resume(dev); 2623 2624 /* Note 3.11 from the datasheet: 2625 * "When the LAN9220 is in a power saving state, a write of any 2626 * data to the BYTE_TEST register will wake-up the device." 2627 */ 2628 smsc911x_reg_write(pdata, BYTE_TEST, 0); 2629 2630 /* poll the READY bit in PMT_CTRL. Any other access to the device is 2631 * forbidden while this bit isn't set. Try for 100ms and return -EIO 2632 * if it failed. */ 2633 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) 2634 udelay(1000); 2635 2636 if (to == 0) 2637 return -EIO; 2638 2639 if (netif_running(ndev)) { 2640 netif_device_attach(ndev); 2641 netif_start_queue(ndev); 2642 } 2643 2644 return 0; 2645 } 2646 2647 static const struct dev_pm_ops smsc911x_pm_ops = { 2648 .suspend = smsc911x_suspend, 2649 .resume = smsc911x_resume, 2650 }; 2651 2652 #define SMSC911X_PM_OPS (&smsc911x_pm_ops) 2653 2654 #else 2655 #define SMSC911X_PM_OPS NULL 2656 #endif 2657 2658 #ifdef CONFIG_OF 2659 static const struct of_device_id smsc911x_dt_ids[] = { 2660 { .compatible = "smsc,lan9115", }, 2661 { /* sentinel */ } 2662 }; 2663 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids); 2664 #endif 2665 2666 static const struct acpi_device_id smsc911x_acpi_match[] = { 2667 { "ARMH9118", 0 }, 2668 { } 2669 }; 2670 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match); 2671 2672 static struct platform_driver smsc911x_driver = { 2673 .probe = smsc911x_drv_probe, 2674 .remove = smsc911x_drv_remove, 2675 .driver = { 2676 .name = SMSC_CHIPNAME, 2677 .pm = SMSC911X_PM_OPS, 2678 .of_match_table = of_match_ptr(smsc911x_dt_ids), 2679 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match), 2680 }, 2681 }; 2682 2683 /* Entry point for loading the module */ 2684 static int __init smsc911x_init_module(void) 2685 { 2686 SMSC_INITIALIZE(); 2687 return platform_driver_register(&smsc911x_driver); 2688 } 2689 2690 /* entry point for unloading the module */ 2691 static void __exit smsc911x_cleanup_module(void) 2692 { 2693 platform_driver_unregister(&smsc911x_driver); 2694 } 2695 2696 module_init(smsc911x_init_module); 2697 module_exit(smsc911x_cleanup_module); 2698