1 /*************************************************************************** 2 * 3 * Copyright (C) 2004-2008 SMSC 4 * Copyright (C) 2005-2008 ARM 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 * 20 *************************************************************************** 21 * Rewritten, heavily based on smsc911x simple driver by SMSC. 22 * Partly uses io macros from smc91x.c by Nicolas Pitre 23 * 24 * Supported devices: 25 * LAN9115, LAN9116, LAN9117, LAN9118 26 * LAN9215, LAN9216, LAN9217, LAN9218 27 * LAN9210, LAN9211 28 * LAN9220, LAN9221 29 * LAN89218 30 * 31 */ 32 33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 34 35 #include <linux/crc32.h> 36 #include <linux/delay.h> 37 #include <linux/errno.h> 38 #include <linux/etherdevice.h> 39 #include <linux/ethtool.h> 40 #include <linux/init.h> 41 #include <linux/interrupt.h> 42 #include <linux/ioport.h> 43 #include <linux/kernel.h> 44 #include <linux/module.h> 45 #include <linux/netdevice.h> 46 #include <linux/platform_device.h> 47 #include <linux/sched.h> 48 #include <linux/timer.h> 49 #include <linux/bug.h> 50 #include <linux/bitops.h> 51 #include <linux/irq.h> 52 #include <linux/io.h> 53 #include <linux/swab.h> 54 #include <linux/phy.h> 55 #include <linux/smsc911x.h> 56 #include <linux/device.h> 57 #include <linux/of.h> 58 #include <linux/of_device.h> 59 #include <linux/of_gpio.h> 60 #include <linux/of_net.h> 61 #include "smsc911x.h" 62 63 #define SMSC_CHIPNAME "smsc911x" 64 #define SMSC_MDIONAME "smsc911x-mdio" 65 #define SMSC_DRV_VERSION "2008-10-21" 66 67 MODULE_LICENSE("GPL"); 68 MODULE_VERSION(SMSC_DRV_VERSION); 69 MODULE_ALIAS("platform:smsc911x"); 70 71 #if USE_DEBUG > 0 72 static int debug = 16; 73 #else 74 static int debug = 3; 75 #endif 76 77 module_param(debug, int, 0); 78 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 79 80 struct smsc911x_data; 81 82 struct smsc911x_ops { 83 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg); 84 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val); 85 void (*rx_readfifo)(struct smsc911x_data *pdata, 86 unsigned int *buf, unsigned int wordcount); 87 void (*tx_writefifo)(struct smsc911x_data *pdata, 88 unsigned int *buf, unsigned int wordcount); 89 }; 90 91 struct smsc911x_data { 92 void __iomem *ioaddr; 93 94 unsigned int idrev; 95 96 /* used to decide which workarounds apply */ 97 unsigned int generation; 98 99 /* device configuration (copied from platform_data during probe) */ 100 struct smsc911x_platform_config config; 101 102 /* This needs to be acquired before calling any of below: 103 * smsc911x_mac_read(), smsc911x_mac_write() 104 */ 105 spinlock_t mac_lock; 106 107 /* spinlock to ensure register accesses are serialised */ 108 spinlock_t dev_lock; 109 110 struct phy_device *phy_dev; 111 struct mii_bus *mii_bus; 112 int phy_irq[PHY_MAX_ADDR]; 113 unsigned int using_extphy; 114 int last_duplex; 115 int last_carrier; 116 117 u32 msg_enable; 118 unsigned int gpio_setting; 119 unsigned int gpio_orig_setting; 120 struct net_device *dev; 121 struct napi_struct napi; 122 123 unsigned int software_irq_signal; 124 125 #ifdef USE_PHY_WORK_AROUND 126 #define MIN_PACKET_SIZE (64) 127 char loopback_tx_pkt[MIN_PACKET_SIZE]; 128 char loopback_rx_pkt[MIN_PACKET_SIZE]; 129 unsigned int resetcount; 130 #endif 131 132 /* Members for Multicast filter workaround */ 133 unsigned int multicast_update_pending; 134 unsigned int set_bits_mask; 135 unsigned int clear_bits_mask; 136 unsigned int hashhi; 137 unsigned int hashlo; 138 139 /* register access functions */ 140 const struct smsc911x_ops *ops; 141 }; 142 143 /* Easy access to information */ 144 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift)) 145 146 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 147 { 148 if (pdata->config.flags & SMSC911X_USE_32BIT) 149 return readl(pdata->ioaddr + reg); 150 151 if (pdata->config.flags & SMSC911X_USE_16BIT) 152 return ((readw(pdata->ioaddr + reg) & 0xFFFF) | 153 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16)); 154 155 BUG(); 156 return 0; 157 } 158 159 static inline u32 160 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg) 161 { 162 if (pdata->config.flags & SMSC911X_USE_32BIT) 163 return readl(pdata->ioaddr + __smsc_shift(pdata, reg)); 164 165 if (pdata->config.flags & SMSC911X_USE_16BIT) 166 return (readw(pdata->ioaddr + 167 __smsc_shift(pdata, reg)) & 0xFFFF) | 168 ((readw(pdata->ioaddr + 169 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16); 170 171 BUG(); 172 return 0; 173 } 174 175 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) 176 { 177 u32 data; 178 unsigned long flags; 179 180 spin_lock_irqsave(&pdata->dev_lock, flags); 181 data = pdata->ops->reg_read(pdata, reg); 182 spin_unlock_irqrestore(&pdata->dev_lock, flags); 183 184 return data; 185 } 186 187 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 188 u32 val) 189 { 190 if (pdata->config.flags & SMSC911X_USE_32BIT) { 191 writel(val, pdata->ioaddr + reg); 192 return; 193 } 194 195 if (pdata->config.flags & SMSC911X_USE_16BIT) { 196 writew(val & 0xFFFF, pdata->ioaddr + reg); 197 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2); 198 return; 199 } 200 201 BUG(); 202 } 203 204 static inline void 205 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val) 206 { 207 if (pdata->config.flags & SMSC911X_USE_32BIT) { 208 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg)); 209 return; 210 } 211 212 if (pdata->config.flags & SMSC911X_USE_16BIT) { 213 writew(val & 0xFFFF, 214 pdata->ioaddr + __smsc_shift(pdata, reg)); 215 writew((val >> 16) & 0xFFFF, 216 pdata->ioaddr + __smsc_shift(pdata, reg + 2)); 217 return; 218 } 219 220 BUG(); 221 } 222 223 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, 224 u32 val) 225 { 226 unsigned long flags; 227 228 spin_lock_irqsave(&pdata->dev_lock, flags); 229 pdata->ops->reg_write(pdata, reg, val); 230 spin_unlock_irqrestore(&pdata->dev_lock, flags); 231 } 232 233 /* Writes a packet to the TX_DATA_FIFO */ 234 static inline void 235 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf, 236 unsigned int wordcount) 237 { 238 unsigned long flags; 239 240 spin_lock_irqsave(&pdata->dev_lock, flags); 241 242 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 243 while (wordcount--) 244 __smsc911x_reg_write(pdata, TX_DATA_FIFO, 245 swab32(*buf++)); 246 goto out; 247 } 248 249 if (pdata->config.flags & SMSC911X_USE_32BIT) { 250 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount); 251 goto out; 252 } 253 254 if (pdata->config.flags & SMSC911X_USE_16BIT) { 255 while (wordcount--) 256 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++); 257 goto out; 258 } 259 260 BUG(); 261 out: 262 spin_unlock_irqrestore(&pdata->dev_lock, flags); 263 } 264 265 /* Writes a packet to the TX_DATA_FIFO - shifted version */ 266 static inline void 267 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 268 unsigned int wordcount) 269 { 270 unsigned long flags; 271 272 spin_lock_irqsave(&pdata->dev_lock, flags); 273 274 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 275 while (wordcount--) 276 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO, 277 swab32(*buf++)); 278 goto out; 279 } 280 281 if (pdata->config.flags & SMSC911X_USE_32BIT) { 282 writesl(pdata->ioaddr + __smsc_shift(pdata, 283 TX_DATA_FIFO), buf, wordcount); 284 goto out; 285 } 286 287 if (pdata->config.flags & SMSC911X_USE_16BIT) { 288 while (wordcount--) 289 __smsc911x_reg_write_shift(pdata, 290 TX_DATA_FIFO, *buf++); 291 goto out; 292 } 293 294 BUG(); 295 out: 296 spin_unlock_irqrestore(&pdata->dev_lock, flags); 297 } 298 299 /* Reads a packet out of the RX_DATA_FIFO */ 300 static inline void 301 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf, 302 unsigned int wordcount) 303 { 304 unsigned long flags; 305 306 spin_lock_irqsave(&pdata->dev_lock, flags); 307 308 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 309 while (wordcount--) 310 *buf++ = swab32(__smsc911x_reg_read(pdata, 311 RX_DATA_FIFO)); 312 goto out; 313 } 314 315 if (pdata->config.flags & SMSC911X_USE_32BIT) { 316 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount); 317 goto out; 318 } 319 320 if (pdata->config.flags & SMSC911X_USE_16BIT) { 321 while (wordcount--) 322 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO); 323 goto out; 324 } 325 326 BUG(); 327 out: 328 spin_unlock_irqrestore(&pdata->dev_lock, flags); 329 } 330 331 /* Reads a packet out of the RX_DATA_FIFO - shifted version */ 332 static inline void 333 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf, 334 unsigned int wordcount) 335 { 336 unsigned long flags; 337 338 spin_lock_irqsave(&pdata->dev_lock, flags); 339 340 if (pdata->config.flags & SMSC911X_SWAP_FIFO) { 341 while (wordcount--) 342 *buf++ = swab32(__smsc911x_reg_read_shift(pdata, 343 RX_DATA_FIFO)); 344 goto out; 345 } 346 347 if (pdata->config.flags & SMSC911X_USE_32BIT) { 348 readsl(pdata->ioaddr + __smsc_shift(pdata, 349 RX_DATA_FIFO), buf, wordcount); 350 goto out; 351 } 352 353 if (pdata->config.flags & SMSC911X_USE_16BIT) { 354 while (wordcount--) 355 *buf++ = __smsc911x_reg_read_shift(pdata, 356 RX_DATA_FIFO); 357 goto out; 358 } 359 360 BUG(); 361 out: 362 spin_unlock_irqrestore(&pdata->dev_lock, flags); 363 } 364 365 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read 366 * and smsc911x_mac_write, so assumes mac_lock is held */ 367 static int smsc911x_mac_complete(struct smsc911x_data *pdata) 368 { 369 int i; 370 u32 val; 371 372 SMSC_ASSERT_MAC_LOCK(pdata); 373 374 for (i = 0; i < 40; i++) { 375 val = smsc911x_reg_read(pdata, MAC_CSR_CMD); 376 if (!(val & MAC_CSR_CMD_CSR_BUSY_)) 377 return 0; 378 } 379 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. " 380 "MAC_CSR_CMD: 0x%08X", val); 381 return -EIO; 382 } 383 384 /* Fetches a MAC register value. Assumes mac_lock is acquired */ 385 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset) 386 { 387 unsigned int temp; 388 389 SMSC_ASSERT_MAC_LOCK(pdata); 390 391 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 392 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 393 SMSC_WARN(pdata, hw, "MAC busy at entry"); 394 return 0xFFFFFFFF; 395 } 396 397 /* Send the MAC cmd */ 398 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 399 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_)); 400 401 /* Workaround for hardware read-after-write restriction */ 402 temp = smsc911x_reg_read(pdata, BYTE_TEST); 403 404 /* Wait for the read to complete */ 405 if (likely(smsc911x_mac_complete(pdata) == 0)) 406 return smsc911x_reg_read(pdata, MAC_CSR_DATA); 407 408 SMSC_WARN(pdata, hw, "MAC busy after read"); 409 return 0xFFFFFFFF; 410 } 411 412 /* Set a mac register, mac_lock must be acquired before calling */ 413 static void smsc911x_mac_write(struct smsc911x_data *pdata, 414 unsigned int offset, u32 val) 415 { 416 unsigned int temp; 417 418 SMSC_ASSERT_MAC_LOCK(pdata); 419 420 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); 421 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { 422 SMSC_WARN(pdata, hw, 423 "smsc911x_mac_write failed, MAC busy at entry"); 424 return; 425 } 426 427 /* Send data to write */ 428 smsc911x_reg_write(pdata, MAC_CSR_DATA, val); 429 430 /* Write the actual data */ 431 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | 432 MAC_CSR_CMD_CSR_BUSY_)); 433 434 /* Workaround for hardware read-after-write restriction */ 435 temp = smsc911x_reg_read(pdata, BYTE_TEST); 436 437 /* Wait for the write to complete */ 438 if (likely(smsc911x_mac_complete(pdata) == 0)) 439 return; 440 441 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write"); 442 } 443 444 /* Get a phy register */ 445 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx) 446 { 447 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 448 unsigned long flags; 449 unsigned int addr; 450 int i, reg; 451 452 spin_lock_irqsave(&pdata->mac_lock, flags); 453 454 /* Confirm MII not busy */ 455 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 456 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???"); 457 reg = -EIO; 458 goto out; 459 } 460 461 /* Set the address, index & direction (read from PHY) */ 462 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6); 463 smsc911x_mac_write(pdata, MII_ACC, addr); 464 465 /* Wait for read to complete w/ timeout */ 466 for (i = 0; i < 100; i++) 467 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 468 reg = smsc911x_mac_read(pdata, MII_DATA); 469 goto out; 470 } 471 472 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish"); 473 reg = -EIO; 474 475 out: 476 spin_unlock_irqrestore(&pdata->mac_lock, flags); 477 return reg; 478 } 479 480 /* Set a phy register */ 481 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx, 482 u16 val) 483 { 484 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; 485 unsigned long flags; 486 unsigned int addr; 487 int i, reg; 488 489 spin_lock_irqsave(&pdata->mac_lock, flags); 490 491 /* Confirm MII not busy */ 492 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 493 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???"); 494 reg = -EIO; 495 goto out; 496 } 497 498 /* Put the data to write in the MAC */ 499 smsc911x_mac_write(pdata, MII_DATA, val); 500 501 /* Set the address, index & direction (write to PHY) */ 502 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | 503 MII_ACC_MII_WRITE_; 504 smsc911x_mac_write(pdata, MII_ACC, addr); 505 506 /* Wait for write to complete w/ timeout */ 507 for (i = 0; i < 100; i++) 508 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { 509 reg = 0; 510 goto out; 511 } 512 513 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish"); 514 reg = -EIO; 515 516 out: 517 spin_unlock_irqrestore(&pdata->mac_lock, flags); 518 return reg; 519 } 520 521 /* Switch to external phy. Assumes tx and rx are stopped. */ 522 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) 523 { 524 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 525 526 /* Disable phy clocks to the MAC */ 527 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 528 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; 529 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 530 udelay(10); /* Enough time for clocks to stop */ 531 532 /* Switch to external phy */ 533 hwcfg |= HW_CFG_EXT_PHY_EN_; 534 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 535 536 /* Enable phy clocks to the MAC */ 537 hwcfg &= (~HW_CFG_PHY_CLK_SEL_); 538 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; 539 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 540 udelay(10); /* Enough time for clocks to restart */ 541 542 hwcfg |= HW_CFG_SMI_SEL_; 543 smsc911x_reg_write(pdata, HW_CFG, hwcfg); 544 } 545 546 /* Autodetects and enables external phy if present on supported chips. 547 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY 548 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ 549 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) 550 { 551 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); 552 553 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { 554 SMSC_TRACE(pdata, hw, "Forcing internal PHY"); 555 pdata->using_extphy = 0; 556 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { 557 SMSC_TRACE(pdata, hw, "Forcing external PHY"); 558 smsc911x_phy_enable_external(pdata); 559 pdata->using_extphy = 1; 560 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { 561 SMSC_TRACE(pdata, hw, 562 "HW_CFG EXT_PHY_DET set, using external PHY"); 563 smsc911x_phy_enable_external(pdata); 564 pdata->using_extphy = 1; 565 } else { 566 SMSC_TRACE(pdata, hw, 567 "HW_CFG EXT_PHY_DET clear, using internal PHY"); 568 pdata->using_extphy = 0; 569 } 570 } 571 572 /* Fetches a tx status out of the status fifo */ 573 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata) 574 { 575 unsigned int result = 576 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_; 577 578 if (result != 0) 579 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO); 580 581 return result; 582 } 583 584 /* Fetches the next rx status */ 585 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata) 586 { 587 unsigned int result = 588 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_; 589 590 if (result != 0) 591 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO); 592 593 return result; 594 } 595 596 #ifdef USE_PHY_WORK_AROUND 597 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata) 598 { 599 unsigned int tries; 600 u32 wrsz; 601 u32 rdsz; 602 ulong bufp; 603 604 for (tries = 0; tries < 10; tries++) { 605 unsigned int txcmd_a; 606 unsigned int txcmd_b; 607 unsigned int status; 608 unsigned int pktlength; 609 unsigned int i; 610 611 /* Zero-out rx packet memory */ 612 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE); 613 614 /* Write tx packet to 118 */ 615 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16; 616 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 617 txcmd_a |= MIN_PACKET_SIZE; 618 619 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE; 620 621 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a); 622 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b); 623 624 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3); 625 wrsz = MIN_PACKET_SIZE + 3; 626 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3); 627 wrsz >>= 2; 628 629 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 630 631 /* Wait till transmit is done */ 632 i = 60; 633 do { 634 udelay(5); 635 status = smsc911x_tx_get_txstatus(pdata); 636 } while ((i--) && (!status)); 637 638 if (!status) { 639 SMSC_WARN(pdata, hw, 640 "Failed to transmit during loopback test"); 641 continue; 642 } 643 if (status & TX_STS_ES_) { 644 SMSC_WARN(pdata, hw, 645 "Transmit encountered errors during loopback test"); 646 continue; 647 } 648 649 /* Wait till receive is done */ 650 i = 60; 651 do { 652 udelay(5); 653 status = smsc911x_rx_get_rxstatus(pdata); 654 } while ((i--) && (!status)); 655 656 if (!status) { 657 SMSC_WARN(pdata, hw, 658 "Failed to receive during loopback test"); 659 continue; 660 } 661 if (status & RX_STS_ES_) { 662 SMSC_WARN(pdata, hw, 663 "Receive encountered errors during loopback test"); 664 continue; 665 } 666 667 pktlength = ((status & 0x3FFF0000UL) >> 16); 668 bufp = (ulong)pdata->loopback_rx_pkt; 669 rdsz = pktlength + 3; 670 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3); 671 rdsz >>= 2; 672 673 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz); 674 675 if (pktlength != (MIN_PACKET_SIZE + 4)) { 676 SMSC_WARN(pdata, hw, "Unexpected packet size " 677 "during loop back test, size=%d, will retry", 678 pktlength); 679 } else { 680 unsigned int j; 681 int mismatch = 0; 682 for (j = 0; j < MIN_PACKET_SIZE; j++) { 683 if (pdata->loopback_tx_pkt[j] 684 != pdata->loopback_rx_pkt[j]) { 685 mismatch = 1; 686 break; 687 } 688 } 689 if (!mismatch) { 690 SMSC_TRACE(pdata, hw, "Successfully verified " 691 "loopback packet"); 692 return 0; 693 } else { 694 SMSC_WARN(pdata, hw, "Data mismatch " 695 "during loop back test, will retry"); 696 } 697 } 698 } 699 700 return -EIO; 701 } 702 703 static int smsc911x_phy_reset(struct smsc911x_data *pdata) 704 { 705 struct phy_device *phy_dev = pdata->phy_dev; 706 unsigned int temp; 707 unsigned int i = 100000; 708 709 BUG_ON(!phy_dev); 710 BUG_ON(!phy_dev->bus); 711 712 SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset"); 713 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET); 714 do { 715 msleep(1); 716 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, 717 MII_BMCR); 718 } while ((i--) && (temp & BMCR_RESET)); 719 720 if (temp & BMCR_RESET) { 721 SMSC_WARN(pdata, hw, "PHY reset failed to complete"); 722 return -EIO; 723 } 724 /* Extra delay required because the phy may not be completed with 725 * its reset when BMCR_RESET is cleared. Specs say 256 uS is 726 * enough delay but using 1ms here to be safe */ 727 msleep(1); 728 729 return 0; 730 } 731 732 static int smsc911x_phy_loopbacktest(struct net_device *dev) 733 { 734 struct smsc911x_data *pdata = netdev_priv(dev); 735 struct phy_device *phy_dev = pdata->phy_dev; 736 int result = -EIO; 737 unsigned int i, val; 738 unsigned long flags; 739 740 /* Initialise tx packet using broadcast destination address */ 741 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN); 742 743 /* Use incrementing source address */ 744 for (i = 6; i < 12; i++) 745 pdata->loopback_tx_pkt[i] = (char)i; 746 747 /* Set length type field */ 748 pdata->loopback_tx_pkt[12] = 0x00; 749 pdata->loopback_tx_pkt[13] = 0x00; 750 751 for (i = 14; i < MIN_PACKET_SIZE; i++) 752 pdata->loopback_tx_pkt[i] = (char)i; 753 754 val = smsc911x_reg_read(pdata, HW_CFG); 755 val &= HW_CFG_TX_FIF_SZ_; 756 val |= HW_CFG_SF_; 757 smsc911x_reg_write(pdata, HW_CFG, val); 758 759 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 760 smsc911x_reg_write(pdata, RX_CFG, 761 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8); 762 763 for (i = 0; i < 10; i++) { 764 /* Set PHY to 10/FD, no ANEG, and loopback mode */ 765 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 766 BMCR_LOOPBACK | BMCR_FULLDPLX); 767 768 /* Enable MAC tx/rx, FD */ 769 spin_lock_irqsave(&pdata->mac_lock, flags); 770 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_ 771 | MAC_CR_TXEN_ | MAC_CR_RXEN_); 772 spin_unlock_irqrestore(&pdata->mac_lock, flags); 773 774 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) { 775 result = 0; 776 break; 777 } 778 pdata->resetcount++; 779 780 /* Disable MAC rx */ 781 spin_lock_irqsave(&pdata->mac_lock, flags); 782 smsc911x_mac_write(pdata, MAC_CR, 0); 783 spin_unlock_irqrestore(&pdata->mac_lock, flags); 784 785 smsc911x_phy_reset(pdata); 786 } 787 788 /* Disable MAC */ 789 spin_lock_irqsave(&pdata->mac_lock, flags); 790 smsc911x_mac_write(pdata, MAC_CR, 0); 791 spin_unlock_irqrestore(&pdata->mac_lock, flags); 792 793 /* Cancel PHY loopback mode */ 794 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0); 795 796 smsc911x_reg_write(pdata, TX_CFG, 0); 797 smsc911x_reg_write(pdata, RX_CFG, 0); 798 799 return result; 800 } 801 #endif /* USE_PHY_WORK_AROUND */ 802 803 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata) 804 { 805 struct phy_device *phy_dev = pdata->phy_dev; 806 u32 afc = smsc911x_reg_read(pdata, AFC_CFG); 807 u32 flow; 808 unsigned long flags; 809 810 if (phy_dev->duplex == DUPLEX_FULL) { 811 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); 812 u16 rmtadv = phy_read(phy_dev, MII_LPA); 813 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 814 815 if (cap & FLOW_CTRL_RX) 816 flow = 0xFFFF0002; 817 else 818 flow = 0; 819 820 if (cap & FLOW_CTRL_TX) 821 afc |= 0xF; 822 else 823 afc &= ~0xF; 824 825 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s", 826 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 827 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 828 } else { 829 SMSC_TRACE(pdata, hw, "half duplex"); 830 flow = 0; 831 afc |= 0xF; 832 } 833 834 spin_lock_irqsave(&pdata->mac_lock, flags); 835 smsc911x_mac_write(pdata, FLOW, flow); 836 spin_unlock_irqrestore(&pdata->mac_lock, flags); 837 838 smsc911x_reg_write(pdata, AFC_CFG, afc); 839 } 840 841 /* Update link mode if anything has changed. Called periodically when the 842 * PHY is in polling mode, even if nothing has changed. */ 843 static void smsc911x_phy_adjust_link(struct net_device *dev) 844 { 845 struct smsc911x_data *pdata = netdev_priv(dev); 846 struct phy_device *phy_dev = pdata->phy_dev; 847 unsigned long flags; 848 int carrier; 849 850 if (phy_dev->duplex != pdata->last_duplex) { 851 unsigned int mac_cr; 852 SMSC_TRACE(pdata, hw, "duplex state has changed"); 853 854 spin_lock_irqsave(&pdata->mac_lock, flags); 855 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 856 if (phy_dev->duplex) { 857 SMSC_TRACE(pdata, hw, 858 "configuring for full duplex mode"); 859 mac_cr |= MAC_CR_FDPX_; 860 } else { 861 SMSC_TRACE(pdata, hw, 862 "configuring for half duplex mode"); 863 mac_cr &= ~MAC_CR_FDPX_; 864 } 865 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 866 spin_unlock_irqrestore(&pdata->mac_lock, flags); 867 868 smsc911x_phy_update_flowcontrol(pdata); 869 pdata->last_duplex = phy_dev->duplex; 870 } 871 872 carrier = netif_carrier_ok(dev); 873 if (carrier != pdata->last_carrier) { 874 SMSC_TRACE(pdata, hw, "carrier state has changed"); 875 if (carrier) { 876 SMSC_TRACE(pdata, hw, "configuring for carrier OK"); 877 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) && 878 (!pdata->using_extphy)) { 879 /* Restore original GPIO configuration */ 880 pdata->gpio_setting = pdata->gpio_orig_setting; 881 smsc911x_reg_write(pdata, GPIO_CFG, 882 pdata->gpio_setting); 883 } 884 } else { 885 SMSC_TRACE(pdata, hw, "configuring for no carrier"); 886 /* Check global setting that LED1 887 * usage is 10/100 indicator */ 888 pdata->gpio_setting = smsc911x_reg_read(pdata, 889 GPIO_CFG); 890 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) && 891 (!pdata->using_extphy)) { 892 /* Force 10/100 LED off, after saving 893 * original GPIO configuration */ 894 pdata->gpio_orig_setting = pdata->gpio_setting; 895 896 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_; 897 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_ 898 | GPIO_CFG_GPIODIR0_ 899 | GPIO_CFG_GPIOD0_); 900 smsc911x_reg_write(pdata, GPIO_CFG, 901 pdata->gpio_setting); 902 } 903 } 904 pdata->last_carrier = carrier; 905 } 906 } 907 908 static int smsc911x_mii_probe(struct net_device *dev) 909 { 910 struct smsc911x_data *pdata = netdev_priv(dev); 911 struct phy_device *phydev = NULL; 912 int ret; 913 914 /* find the first phy */ 915 phydev = phy_find_first(pdata->mii_bus); 916 if (!phydev) { 917 netdev_err(dev, "no PHY found\n"); 918 return -ENODEV; 919 } 920 921 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X", 922 phydev->addr, phydev->phy_id); 923 924 ret = phy_connect_direct(dev, phydev, 925 &smsc911x_phy_adjust_link, 0, 926 pdata->config.phy_interface); 927 928 if (ret) { 929 netdev_err(dev, "Could not attach to PHY\n"); 930 return ret; 931 } 932 933 netdev_info(dev, 934 "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", 935 phydev->drv->name, dev_name(&phydev->dev), phydev->irq); 936 937 /* mask with MAC supported features */ 938 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | 939 SUPPORTED_Asym_Pause); 940 phydev->advertising = phydev->supported; 941 942 pdata->phy_dev = phydev; 943 pdata->last_duplex = -1; 944 pdata->last_carrier = -1; 945 946 #ifdef USE_PHY_WORK_AROUND 947 if (smsc911x_phy_loopbacktest(dev) < 0) { 948 SMSC_WARN(pdata, hw, "Failed Loop Back Test"); 949 return -ENODEV; 950 } 951 SMSC_TRACE(pdata, hw, "Passed Loop Back Test"); 952 #endif /* USE_PHY_WORK_AROUND */ 953 954 SMSC_TRACE(pdata, hw, "phy initialised successfully"); 955 return 0; 956 } 957 958 static int __devinit smsc911x_mii_init(struct platform_device *pdev, 959 struct net_device *dev) 960 { 961 struct smsc911x_data *pdata = netdev_priv(dev); 962 int err = -ENXIO, i; 963 964 pdata->mii_bus = mdiobus_alloc(); 965 if (!pdata->mii_bus) { 966 err = -ENOMEM; 967 goto err_out_1; 968 } 969 970 pdata->mii_bus->name = SMSC_MDIONAME; 971 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id); 972 pdata->mii_bus->priv = pdata; 973 pdata->mii_bus->read = smsc911x_mii_read; 974 pdata->mii_bus->write = smsc911x_mii_write; 975 pdata->mii_bus->irq = pdata->phy_irq; 976 for (i = 0; i < PHY_MAX_ADDR; ++i) 977 pdata->mii_bus->irq[i] = PHY_POLL; 978 979 pdata->mii_bus->parent = &pdev->dev; 980 981 switch (pdata->idrev & 0xFFFF0000) { 982 case 0x01170000: 983 case 0x01150000: 984 case 0x117A0000: 985 case 0x115A0000: 986 /* External PHY supported, try to autodetect */ 987 smsc911x_phy_initialise_external(pdata); 988 break; 989 default: 990 SMSC_TRACE(pdata, hw, "External PHY is not supported, " 991 "using internal PHY"); 992 pdata->using_extphy = 0; 993 break; 994 } 995 996 if (!pdata->using_extphy) { 997 /* Mask all PHYs except ID 1 (internal) */ 998 pdata->mii_bus->phy_mask = ~(1 << 1); 999 } 1000 1001 if (mdiobus_register(pdata->mii_bus)) { 1002 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1003 goto err_out_free_bus_2; 1004 } 1005 1006 if (smsc911x_mii_probe(dev) < 0) { 1007 SMSC_WARN(pdata, probe, "Error registering mii bus"); 1008 goto err_out_unregister_bus_3; 1009 } 1010 1011 return 0; 1012 1013 err_out_unregister_bus_3: 1014 mdiobus_unregister(pdata->mii_bus); 1015 err_out_free_bus_2: 1016 mdiobus_free(pdata->mii_bus); 1017 err_out_1: 1018 return err; 1019 } 1020 1021 /* Gets the number of tx statuses in the fifo */ 1022 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata) 1023 { 1024 return (smsc911x_reg_read(pdata, TX_FIFO_INF) 1025 & TX_FIFO_INF_TSUSED_) >> 16; 1026 } 1027 1028 /* Reads tx statuses and increments counters where necessary */ 1029 static void smsc911x_tx_update_txcounters(struct net_device *dev) 1030 { 1031 struct smsc911x_data *pdata = netdev_priv(dev); 1032 unsigned int tx_stat; 1033 1034 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) { 1035 if (unlikely(tx_stat & 0x80000000)) { 1036 /* In this driver the packet tag is used as the packet 1037 * length. Since a packet length can never reach the 1038 * size of 0x8000, this bit is reserved. It is worth 1039 * noting that the "reserved bit" in the warning above 1040 * does not reference a hardware defined reserved bit 1041 * but rather a driver defined one. 1042 */ 1043 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high"); 1044 } else { 1045 if (unlikely(tx_stat & TX_STS_ES_)) { 1046 dev->stats.tx_errors++; 1047 } else { 1048 dev->stats.tx_packets++; 1049 dev->stats.tx_bytes += (tx_stat >> 16); 1050 } 1051 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) { 1052 dev->stats.collisions += 16; 1053 dev->stats.tx_aborted_errors += 1; 1054 } else { 1055 dev->stats.collisions += 1056 ((tx_stat >> 3) & 0xF); 1057 } 1058 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_)) 1059 dev->stats.tx_carrier_errors += 1; 1060 if (unlikely(tx_stat & TX_STS_LATE_COL_)) { 1061 dev->stats.collisions++; 1062 dev->stats.tx_aborted_errors++; 1063 } 1064 } 1065 } 1066 } 1067 1068 /* Increments the Rx error counters */ 1069 static void 1070 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat) 1071 { 1072 int crc_err = 0; 1073 1074 if (unlikely(rxstat & RX_STS_ES_)) { 1075 dev->stats.rx_errors++; 1076 if (unlikely(rxstat & RX_STS_CRC_ERR_)) { 1077 dev->stats.rx_crc_errors++; 1078 crc_err = 1; 1079 } 1080 } 1081 if (likely(!crc_err)) { 1082 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) && 1083 (rxstat & RX_STS_LENGTH_ERR_))) 1084 dev->stats.rx_length_errors++; 1085 if (rxstat & RX_STS_MCAST_) 1086 dev->stats.multicast++; 1087 } 1088 } 1089 1090 /* Quickly dumps bad packets */ 1091 static void 1092 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes) 1093 { 1094 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2; 1095 1096 if (likely(pktwords >= 4)) { 1097 unsigned int timeout = 500; 1098 unsigned int val; 1099 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_); 1100 do { 1101 udelay(1); 1102 val = smsc911x_reg_read(pdata, RX_DP_CTRL); 1103 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout); 1104 1105 if (unlikely(timeout == 0)) 1106 SMSC_WARN(pdata, hw, "Timed out waiting for " 1107 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val); 1108 } else { 1109 unsigned int temp; 1110 while (pktwords--) 1111 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO); 1112 } 1113 } 1114 1115 /* NAPI poll function */ 1116 static int smsc911x_poll(struct napi_struct *napi, int budget) 1117 { 1118 struct smsc911x_data *pdata = 1119 container_of(napi, struct smsc911x_data, napi); 1120 struct net_device *dev = pdata->dev; 1121 int npackets = 0; 1122 1123 while (npackets < budget) { 1124 unsigned int pktlength; 1125 unsigned int pktwords; 1126 struct sk_buff *skb; 1127 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata); 1128 1129 if (!rxstat) { 1130 unsigned int temp; 1131 /* We processed all packets available. Tell NAPI it can 1132 * stop polling then re-enable rx interrupts */ 1133 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_); 1134 napi_complete(napi); 1135 temp = smsc911x_reg_read(pdata, INT_EN); 1136 temp |= INT_EN_RSFL_EN_; 1137 smsc911x_reg_write(pdata, INT_EN, temp); 1138 break; 1139 } 1140 1141 /* Count packet for NAPI scheduling, even if it has an error. 1142 * Error packets still require cycles to discard */ 1143 npackets++; 1144 1145 pktlength = ((rxstat & 0x3FFF0000) >> 16); 1146 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2; 1147 smsc911x_rx_counterrors(dev, rxstat); 1148 1149 if (unlikely(rxstat & RX_STS_ES_)) { 1150 SMSC_WARN(pdata, rx_err, 1151 "Discarding packet with error bit set"); 1152 /* Packet has an error, discard it and continue with 1153 * the next */ 1154 smsc911x_rx_fastforward(pdata, pktwords); 1155 dev->stats.rx_dropped++; 1156 continue; 1157 } 1158 1159 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN); 1160 if (unlikely(!skb)) { 1161 SMSC_WARN(pdata, rx_err, 1162 "Unable to allocate skb for rx packet"); 1163 /* Drop the packet and stop this polling iteration */ 1164 smsc911x_rx_fastforward(pdata, pktwords); 1165 dev->stats.rx_dropped++; 1166 break; 1167 } 1168 1169 skb->data = skb->head; 1170 skb_reset_tail_pointer(skb); 1171 1172 /* Align IP on 16B boundary */ 1173 skb_reserve(skb, NET_IP_ALIGN); 1174 skb_put(skb, pktlength - 4); 1175 pdata->ops->rx_readfifo(pdata, 1176 (unsigned int *)skb->head, pktwords); 1177 skb->protocol = eth_type_trans(skb, dev); 1178 skb_checksum_none_assert(skb); 1179 netif_receive_skb(skb); 1180 1181 /* Update counters */ 1182 dev->stats.rx_packets++; 1183 dev->stats.rx_bytes += (pktlength - 4); 1184 } 1185 1186 /* Return total received packets */ 1187 return npackets; 1188 } 1189 1190 /* Returns hash bit number for given MAC address 1191 * Example: 1192 * 01 00 5E 00 00 01 -> returns bit number 31 */ 1193 static unsigned int smsc911x_hash(char addr[ETH_ALEN]) 1194 { 1195 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 1196 } 1197 1198 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata) 1199 { 1200 /* Performs the multicast & mac_cr update. This is called when 1201 * safe on the current hardware, and with the mac_lock held */ 1202 unsigned int mac_cr; 1203 1204 SMSC_ASSERT_MAC_LOCK(pdata); 1205 1206 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1207 mac_cr |= pdata->set_bits_mask; 1208 mac_cr &= ~(pdata->clear_bits_mask); 1209 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1210 smsc911x_mac_write(pdata, HASHH, pdata->hashhi); 1211 smsc911x_mac_write(pdata, HASHL, pdata->hashlo); 1212 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X", 1213 mac_cr, pdata->hashhi, pdata->hashlo); 1214 } 1215 1216 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata) 1217 { 1218 unsigned int mac_cr; 1219 1220 /* This function is only called for older LAN911x devices 1221 * (revA or revB), where MAC_CR, HASHH and HASHL should not 1222 * be modified during Rx - newer devices immediately update the 1223 * registers. 1224 * 1225 * This is called from interrupt context */ 1226 1227 spin_lock(&pdata->mac_lock); 1228 1229 /* Check Rx has stopped */ 1230 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_) 1231 SMSC_WARN(pdata, drv, "Rx not stopped"); 1232 1233 /* Perform the update - safe to do now Rx has stopped */ 1234 smsc911x_rx_multicast_update(pdata); 1235 1236 /* Re-enable Rx */ 1237 mac_cr = smsc911x_mac_read(pdata, MAC_CR); 1238 mac_cr |= MAC_CR_RXEN_; 1239 smsc911x_mac_write(pdata, MAC_CR, mac_cr); 1240 1241 pdata->multicast_update_pending = 0; 1242 1243 spin_unlock(&pdata->mac_lock); 1244 } 1245 1246 static int smsc911x_soft_reset(struct smsc911x_data *pdata) 1247 { 1248 unsigned int timeout; 1249 unsigned int temp; 1250 1251 /* Reset the LAN911x */ 1252 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_); 1253 timeout = 10; 1254 do { 1255 udelay(10); 1256 temp = smsc911x_reg_read(pdata, HW_CFG); 1257 } while ((--timeout) && (temp & HW_CFG_SRST_)); 1258 1259 if (unlikely(temp & HW_CFG_SRST_)) { 1260 SMSC_WARN(pdata, drv, "Failed to complete reset"); 1261 return -EIO; 1262 } 1263 return 0; 1264 } 1265 1266 /* Sets the device MAC address to dev_addr, called with mac_lock held */ 1267 static void 1268 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6]) 1269 { 1270 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; 1271 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | 1272 (dev_addr[1] << 8) | dev_addr[0]; 1273 1274 SMSC_ASSERT_MAC_LOCK(pdata); 1275 1276 smsc911x_mac_write(pdata, ADDRH, mac_high16); 1277 smsc911x_mac_write(pdata, ADDRL, mac_low32); 1278 } 1279 1280 static int smsc911x_open(struct net_device *dev) 1281 { 1282 struct smsc911x_data *pdata = netdev_priv(dev); 1283 unsigned int timeout; 1284 unsigned int temp; 1285 unsigned int intcfg; 1286 1287 /* if the phy is not yet registered, retry later*/ 1288 if (!pdata->phy_dev) { 1289 SMSC_WARN(pdata, hw, "phy_dev is NULL"); 1290 return -EAGAIN; 1291 } 1292 1293 if (!is_valid_ether_addr(dev->dev_addr)) { 1294 SMSC_WARN(pdata, hw, "dev_addr is not a valid MAC address"); 1295 return -EADDRNOTAVAIL; 1296 } 1297 1298 /* Reset the LAN911x */ 1299 if (smsc911x_soft_reset(pdata)) { 1300 SMSC_WARN(pdata, hw, "soft reset failed"); 1301 return -EIO; 1302 } 1303 1304 smsc911x_reg_write(pdata, HW_CFG, 0x00050000); 1305 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); 1306 1307 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ 1308 spin_lock_irq(&pdata->mac_lock); 1309 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); 1310 spin_unlock_irq(&pdata->mac_lock); 1311 1312 /* Make sure EEPROM has finished loading before setting GPIO_CFG */ 1313 timeout = 50; 1314 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && 1315 --timeout) { 1316 udelay(10); 1317 } 1318 1319 if (unlikely(timeout == 0)) 1320 SMSC_WARN(pdata, ifup, 1321 "Timed out waiting for EEPROM busy bit to clear"); 1322 1323 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000); 1324 1325 /* The soft reset above cleared the device's MAC address, 1326 * restore it from local copy (set in probe) */ 1327 spin_lock_irq(&pdata->mac_lock); 1328 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1329 spin_unlock_irq(&pdata->mac_lock); 1330 1331 /* Initialise irqs, but leave all sources disabled */ 1332 smsc911x_reg_write(pdata, INT_EN, 0); 1333 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 1334 1335 /* Set interrupt deassertion to 100uS */ 1336 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_); 1337 1338 if (pdata->config.irq_polarity) { 1339 SMSC_TRACE(pdata, ifup, "irq polarity: active high"); 1340 intcfg |= INT_CFG_IRQ_POL_; 1341 } else { 1342 SMSC_TRACE(pdata, ifup, "irq polarity: active low"); 1343 } 1344 1345 if (pdata->config.irq_type) { 1346 SMSC_TRACE(pdata, ifup, "irq type: push-pull"); 1347 intcfg |= INT_CFG_IRQ_TYPE_; 1348 } else { 1349 SMSC_TRACE(pdata, ifup, "irq type: open drain"); 1350 } 1351 1352 smsc911x_reg_write(pdata, INT_CFG, intcfg); 1353 1354 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq); 1355 pdata->software_irq_signal = 0; 1356 smp_wmb(); 1357 1358 temp = smsc911x_reg_read(pdata, INT_EN); 1359 temp |= INT_EN_SW_INT_EN_; 1360 smsc911x_reg_write(pdata, INT_EN, temp); 1361 1362 timeout = 1000; 1363 while (timeout--) { 1364 if (pdata->software_irq_signal) 1365 break; 1366 msleep(1); 1367 } 1368 1369 if (!pdata->software_irq_signal) { 1370 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n", 1371 dev->irq); 1372 return -ENODEV; 1373 } 1374 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d", 1375 dev->irq); 1376 1377 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n", 1378 (unsigned long)pdata->ioaddr, dev->irq); 1379 1380 /* Reset the last known duplex and carrier */ 1381 pdata->last_duplex = -1; 1382 pdata->last_carrier = -1; 1383 1384 /* Bring the PHY up */ 1385 phy_start(pdata->phy_dev); 1386 1387 temp = smsc911x_reg_read(pdata, HW_CFG); 1388 /* Preserve TX FIFO size and external PHY configuration */ 1389 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF); 1390 temp |= HW_CFG_SF_; 1391 smsc911x_reg_write(pdata, HW_CFG, temp); 1392 1393 temp = smsc911x_reg_read(pdata, FIFO_INT); 1394 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1395 temp &= ~(FIFO_INT_RX_STS_LEVEL_); 1396 smsc911x_reg_write(pdata, FIFO_INT, temp); 1397 1398 /* set RX Data offset to 2 bytes for alignment */ 1399 smsc911x_reg_write(pdata, RX_CFG, (2 << 8)); 1400 1401 /* enable NAPI polling before enabling RX interrupts */ 1402 napi_enable(&pdata->napi); 1403 1404 temp = smsc911x_reg_read(pdata, INT_EN); 1405 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_); 1406 smsc911x_reg_write(pdata, INT_EN, temp); 1407 1408 spin_lock_irq(&pdata->mac_lock); 1409 temp = smsc911x_mac_read(pdata, MAC_CR); 1410 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_); 1411 smsc911x_mac_write(pdata, MAC_CR, temp); 1412 spin_unlock_irq(&pdata->mac_lock); 1413 1414 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); 1415 1416 netif_start_queue(dev); 1417 return 0; 1418 } 1419 1420 /* Entry point for stopping the interface */ 1421 static int smsc911x_stop(struct net_device *dev) 1422 { 1423 struct smsc911x_data *pdata = netdev_priv(dev); 1424 unsigned int temp; 1425 1426 /* Disable all device interrupts */ 1427 temp = smsc911x_reg_read(pdata, INT_CFG); 1428 temp &= ~INT_CFG_IRQ_EN_; 1429 smsc911x_reg_write(pdata, INT_CFG, temp); 1430 1431 /* Stop Tx and Rx polling */ 1432 netif_stop_queue(dev); 1433 napi_disable(&pdata->napi); 1434 1435 /* At this point all Rx and Tx activity is stopped */ 1436 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1437 smsc911x_tx_update_txcounters(dev); 1438 1439 /* Bring the PHY down */ 1440 if (pdata->phy_dev) 1441 phy_stop(pdata->phy_dev); 1442 1443 SMSC_TRACE(pdata, ifdown, "Interface stopped"); 1444 return 0; 1445 } 1446 1447 /* Entry point for transmitting a packet */ 1448 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 1449 { 1450 struct smsc911x_data *pdata = netdev_priv(dev); 1451 unsigned int freespace; 1452 unsigned int tx_cmd_a; 1453 unsigned int tx_cmd_b; 1454 unsigned int temp; 1455 u32 wrsz; 1456 ulong bufp; 1457 1458 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_; 1459 1460 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD)) 1461 SMSC_WARN(pdata, tx_err, 1462 "Tx data fifo low, space available: %d", freespace); 1463 1464 /* Word alignment adjustment */ 1465 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16; 1466 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1467 tx_cmd_a |= (unsigned int)skb->len; 1468 1469 tx_cmd_b = ((unsigned int)skb->len) << 16; 1470 tx_cmd_b |= (unsigned int)skb->len; 1471 1472 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a); 1473 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b); 1474 1475 bufp = (ulong)skb->data & (~0x3); 1476 wrsz = (u32)skb->len + 3; 1477 wrsz += (u32)((ulong)skb->data & 0x3); 1478 wrsz >>= 2; 1479 1480 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); 1481 freespace -= (skb->len + 32); 1482 skb_tx_timestamp(skb); 1483 dev_kfree_skb(skb); 1484 1485 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30)) 1486 smsc911x_tx_update_txcounters(dev); 1487 1488 if (freespace < TX_FIFO_LOW_THRESHOLD) { 1489 netif_stop_queue(dev); 1490 temp = smsc911x_reg_read(pdata, FIFO_INT); 1491 temp &= 0x00FFFFFF; 1492 temp |= 0x32000000; 1493 smsc911x_reg_write(pdata, FIFO_INT, temp); 1494 } 1495 1496 return NETDEV_TX_OK; 1497 } 1498 1499 /* Entry point for getting status counters */ 1500 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev) 1501 { 1502 struct smsc911x_data *pdata = netdev_priv(dev); 1503 smsc911x_tx_update_txcounters(dev); 1504 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); 1505 return &dev->stats; 1506 } 1507 1508 /* Entry point for setting addressing modes */ 1509 static void smsc911x_set_multicast_list(struct net_device *dev) 1510 { 1511 struct smsc911x_data *pdata = netdev_priv(dev); 1512 unsigned long flags; 1513 1514 if (dev->flags & IFF_PROMISC) { 1515 /* Enabling promiscuous mode */ 1516 pdata->set_bits_mask = MAC_CR_PRMS_; 1517 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1518 pdata->hashhi = 0; 1519 pdata->hashlo = 0; 1520 } else if (dev->flags & IFF_ALLMULTI) { 1521 /* Enabling all multicast mode */ 1522 pdata->set_bits_mask = MAC_CR_MCPAS_; 1523 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_); 1524 pdata->hashhi = 0; 1525 pdata->hashlo = 0; 1526 } else if (!netdev_mc_empty(dev)) { 1527 /* Enabling specific multicast addresses */ 1528 unsigned int hash_high = 0; 1529 unsigned int hash_low = 0; 1530 struct netdev_hw_addr *ha; 1531 1532 pdata->set_bits_mask = MAC_CR_HPFILT_; 1533 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_); 1534 1535 netdev_for_each_mc_addr(ha, dev) { 1536 unsigned int bitnum = smsc911x_hash(ha->addr); 1537 unsigned int mask = 0x01 << (bitnum & 0x1F); 1538 1539 if (bitnum & 0x20) 1540 hash_high |= mask; 1541 else 1542 hash_low |= mask; 1543 } 1544 1545 pdata->hashhi = hash_high; 1546 pdata->hashlo = hash_low; 1547 } else { 1548 /* Enabling local MAC address only */ 1549 pdata->set_bits_mask = 0; 1550 pdata->clear_bits_mask = 1551 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 1552 pdata->hashhi = 0; 1553 pdata->hashlo = 0; 1554 } 1555 1556 spin_lock_irqsave(&pdata->mac_lock, flags); 1557 1558 if (pdata->generation <= 1) { 1559 /* Older hardware revision - cannot change these flags while 1560 * receiving data */ 1561 if (!pdata->multicast_update_pending) { 1562 unsigned int temp; 1563 SMSC_TRACE(pdata, hw, "scheduling mcast update"); 1564 pdata->multicast_update_pending = 1; 1565 1566 /* Request the hardware to stop, then perform the 1567 * update when we get an RX_STOP interrupt */ 1568 temp = smsc911x_mac_read(pdata, MAC_CR); 1569 temp &= ~(MAC_CR_RXEN_); 1570 smsc911x_mac_write(pdata, MAC_CR, temp); 1571 } else { 1572 /* There is another update pending, this should now 1573 * use the newer values */ 1574 } 1575 } else { 1576 /* Newer hardware revision - can write immediately */ 1577 smsc911x_rx_multicast_update(pdata); 1578 } 1579 1580 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1581 } 1582 1583 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id) 1584 { 1585 struct net_device *dev = dev_id; 1586 struct smsc911x_data *pdata = netdev_priv(dev); 1587 u32 intsts = smsc911x_reg_read(pdata, INT_STS); 1588 u32 inten = smsc911x_reg_read(pdata, INT_EN); 1589 int serviced = IRQ_NONE; 1590 u32 temp; 1591 1592 if (unlikely(intsts & inten & INT_STS_SW_INT_)) { 1593 temp = smsc911x_reg_read(pdata, INT_EN); 1594 temp &= (~INT_EN_SW_INT_EN_); 1595 smsc911x_reg_write(pdata, INT_EN, temp); 1596 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_); 1597 pdata->software_irq_signal = 1; 1598 smp_wmb(); 1599 serviced = IRQ_HANDLED; 1600 } 1601 1602 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) { 1603 /* Called when there is a multicast update scheduled and 1604 * it is now safe to complete the update */ 1605 SMSC_TRACE(pdata, intr, "RX Stop interrupt"); 1606 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_); 1607 if (pdata->multicast_update_pending) 1608 smsc911x_rx_multicast_update_workaround(pdata); 1609 serviced = IRQ_HANDLED; 1610 } 1611 1612 if (intsts & inten & INT_STS_TDFA_) { 1613 temp = smsc911x_reg_read(pdata, FIFO_INT); 1614 temp |= FIFO_INT_TX_AVAIL_LEVEL_; 1615 smsc911x_reg_write(pdata, FIFO_INT, temp); 1616 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_); 1617 netif_wake_queue(dev); 1618 serviced = IRQ_HANDLED; 1619 } 1620 1621 if (unlikely(intsts & inten & INT_STS_RXE_)) { 1622 SMSC_TRACE(pdata, intr, "RX Error interrupt"); 1623 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_); 1624 serviced = IRQ_HANDLED; 1625 } 1626 1627 if (likely(intsts & inten & INT_STS_RSFL_)) { 1628 if (likely(napi_schedule_prep(&pdata->napi))) { 1629 /* Disable Rx interrupts */ 1630 temp = smsc911x_reg_read(pdata, INT_EN); 1631 temp &= (~INT_EN_RSFL_EN_); 1632 smsc911x_reg_write(pdata, INT_EN, temp); 1633 /* Schedule a NAPI poll */ 1634 __napi_schedule(&pdata->napi); 1635 } else { 1636 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed"); 1637 } 1638 serviced = IRQ_HANDLED; 1639 } 1640 1641 return serviced; 1642 } 1643 1644 #ifdef CONFIG_NET_POLL_CONTROLLER 1645 static void smsc911x_poll_controller(struct net_device *dev) 1646 { 1647 disable_irq(dev->irq); 1648 smsc911x_irqhandler(0, dev); 1649 enable_irq(dev->irq); 1650 } 1651 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1652 1653 static int smsc911x_set_mac_address(struct net_device *dev, void *p) 1654 { 1655 struct smsc911x_data *pdata = netdev_priv(dev); 1656 struct sockaddr *addr = p; 1657 1658 /* On older hardware revisions we cannot change the mac address 1659 * registers while receiving data. Newer devices can safely change 1660 * this at any time. */ 1661 if (pdata->generation <= 1 && netif_running(dev)) 1662 return -EBUSY; 1663 1664 if (!is_valid_ether_addr(addr->sa_data)) 1665 return -EADDRNOTAVAIL; 1666 1667 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 1668 1669 spin_lock_irq(&pdata->mac_lock); 1670 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 1671 spin_unlock_irq(&pdata->mac_lock); 1672 1673 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 1674 1675 return 0; 1676 } 1677 1678 /* Standard ioctls for mii-tool */ 1679 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1680 { 1681 struct smsc911x_data *pdata = netdev_priv(dev); 1682 1683 if (!netif_running(dev) || !pdata->phy_dev) 1684 return -EINVAL; 1685 1686 return phy_mii_ioctl(pdata->phy_dev, ifr, cmd); 1687 } 1688 1689 static int 1690 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) 1691 { 1692 struct smsc911x_data *pdata = netdev_priv(dev); 1693 1694 cmd->maxtxpkt = 1; 1695 cmd->maxrxpkt = 1; 1696 return phy_ethtool_gset(pdata->phy_dev, cmd); 1697 } 1698 1699 static int 1700 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) 1701 { 1702 struct smsc911x_data *pdata = netdev_priv(dev); 1703 1704 return phy_ethtool_sset(pdata->phy_dev, cmd); 1705 } 1706 1707 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev, 1708 struct ethtool_drvinfo *info) 1709 { 1710 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver)); 1711 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version)); 1712 strlcpy(info->bus_info, dev_name(dev->dev.parent), 1713 sizeof(info->bus_info)); 1714 } 1715 1716 static int smsc911x_ethtool_nwayreset(struct net_device *dev) 1717 { 1718 struct smsc911x_data *pdata = netdev_priv(dev); 1719 1720 return phy_start_aneg(pdata->phy_dev); 1721 } 1722 1723 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev) 1724 { 1725 struct smsc911x_data *pdata = netdev_priv(dev); 1726 return pdata->msg_enable; 1727 } 1728 1729 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level) 1730 { 1731 struct smsc911x_data *pdata = netdev_priv(dev); 1732 pdata->msg_enable = level; 1733 } 1734 1735 static int smsc911x_ethtool_getregslen(struct net_device *dev) 1736 { 1737 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) * 1738 sizeof(u32); 1739 } 1740 1741 static void 1742 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, 1743 void *buf) 1744 { 1745 struct smsc911x_data *pdata = netdev_priv(dev); 1746 struct phy_device *phy_dev = pdata->phy_dev; 1747 unsigned long flags; 1748 unsigned int i; 1749 unsigned int j = 0; 1750 u32 *data = buf; 1751 1752 regs->version = pdata->idrev; 1753 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32))) 1754 data[j++] = smsc911x_reg_read(pdata, i); 1755 1756 for (i = MAC_CR; i <= WUCSR; i++) { 1757 spin_lock_irqsave(&pdata->mac_lock, flags); 1758 data[j++] = smsc911x_mac_read(pdata, i); 1759 spin_unlock_irqrestore(&pdata->mac_lock, flags); 1760 } 1761 1762 for (i = 0; i <= 31; i++) 1763 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i); 1764 } 1765 1766 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata) 1767 { 1768 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG); 1769 temp &= ~GPIO_CFG_EEPR_EN_; 1770 smsc911x_reg_write(pdata, GPIO_CFG, temp); 1771 msleep(1); 1772 } 1773 1774 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op) 1775 { 1776 int timeout = 100; 1777 u32 e2cmd; 1778 1779 SMSC_TRACE(pdata, drv, "op 0x%08x", op); 1780 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) { 1781 SMSC_WARN(pdata, drv, "Busy at start"); 1782 return -EBUSY; 1783 } 1784 1785 e2cmd = op | E2P_CMD_EPC_BUSY_; 1786 smsc911x_reg_write(pdata, E2P_CMD, e2cmd); 1787 1788 do { 1789 msleep(1); 1790 e2cmd = smsc911x_reg_read(pdata, E2P_CMD); 1791 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); 1792 1793 if (!timeout) { 1794 SMSC_TRACE(pdata, drv, "TIMED OUT"); 1795 return -EAGAIN; 1796 } 1797 1798 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { 1799 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation"); 1800 return -EINVAL; 1801 } 1802 1803 return 0; 1804 } 1805 1806 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata, 1807 u8 address, u8 *data) 1808 { 1809 u32 op = E2P_CMD_EPC_CMD_READ_ | address; 1810 int ret; 1811 1812 SMSC_TRACE(pdata, drv, "address 0x%x", address); 1813 ret = smsc911x_eeprom_send_cmd(pdata, op); 1814 1815 if (!ret) 1816 data[address] = smsc911x_reg_read(pdata, E2P_DATA); 1817 1818 return ret; 1819 } 1820 1821 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata, 1822 u8 address, u8 data) 1823 { 1824 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; 1825 u32 temp; 1826 int ret; 1827 1828 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data); 1829 ret = smsc911x_eeprom_send_cmd(pdata, op); 1830 1831 if (!ret) { 1832 op = E2P_CMD_EPC_CMD_WRITE_ | address; 1833 smsc911x_reg_write(pdata, E2P_DATA, (u32)data); 1834 1835 /* Workaround for hardware read-after-write restriction */ 1836 temp = smsc911x_reg_read(pdata, BYTE_TEST); 1837 1838 ret = smsc911x_eeprom_send_cmd(pdata, op); 1839 } 1840 1841 return ret; 1842 } 1843 1844 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev) 1845 { 1846 return SMSC911X_EEPROM_SIZE; 1847 } 1848 1849 static int smsc911x_ethtool_get_eeprom(struct net_device *dev, 1850 struct ethtool_eeprom *eeprom, u8 *data) 1851 { 1852 struct smsc911x_data *pdata = netdev_priv(dev); 1853 u8 eeprom_data[SMSC911X_EEPROM_SIZE]; 1854 int len; 1855 int i; 1856 1857 smsc911x_eeprom_enable_access(pdata); 1858 1859 len = min(eeprom->len, SMSC911X_EEPROM_SIZE); 1860 for (i = 0; i < len; i++) { 1861 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data); 1862 if (ret < 0) { 1863 eeprom->len = 0; 1864 return ret; 1865 } 1866 } 1867 1868 memcpy(data, &eeprom_data[eeprom->offset], len); 1869 eeprom->len = len; 1870 return 0; 1871 } 1872 1873 static int smsc911x_ethtool_set_eeprom(struct net_device *dev, 1874 struct ethtool_eeprom *eeprom, u8 *data) 1875 { 1876 int ret; 1877 struct smsc911x_data *pdata = netdev_priv(dev); 1878 1879 smsc911x_eeprom_enable_access(pdata); 1880 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_); 1881 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data); 1882 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_); 1883 1884 /* Single byte write, according to man page */ 1885 eeprom->len = 1; 1886 1887 return ret; 1888 } 1889 1890 static const struct ethtool_ops smsc911x_ethtool_ops = { 1891 .get_settings = smsc911x_ethtool_getsettings, 1892 .set_settings = smsc911x_ethtool_setsettings, 1893 .get_link = ethtool_op_get_link, 1894 .get_drvinfo = smsc911x_ethtool_getdrvinfo, 1895 .nway_reset = smsc911x_ethtool_nwayreset, 1896 .get_msglevel = smsc911x_ethtool_getmsglevel, 1897 .set_msglevel = smsc911x_ethtool_setmsglevel, 1898 .get_regs_len = smsc911x_ethtool_getregslen, 1899 .get_regs = smsc911x_ethtool_getregs, 1900 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len, 1901 .get_eeprom = smsc911x_ethtool_get_eeprom, 1902 .set_eeprom = smsc911x_ethtool_set_eeprom, 1903 }; 1904 1905 static const struct net_device_ops smsc911x_netdev_ops = { 1906 .ndo_open = smsc911x_open, 1907 .ndo_stop = smsc911x_stop, 1908 .ndo_start_xmit = smsc911x_hard_start_xmit, 1909 .ndo_get_stats = smsc911x_get_stats, 1910 .ndo_set_rx_mode = smsc911x_set_multicast_list, 1911 .ndo_do_ioctl = smsc911x_do_ioctl, 1912 .ndo_change_mtu = eth_change_mtu, 1913 .ndo_validate_addr = eth_validate_addr, 1914 .ndo_set_mac_address = smsc911x_set_mac_address, 1915 #ifdef CONFIG_NET_POLL_CONTROLLER 1916 .ndo_poll_controller = smsc911x_poll_controller, 1917 #endif 1918 }; 1919 1920 /* copies the current mac address from hardware to dev->dev_addr */ 1921 static void __devinit smsc911x_read_mac_address(struct net_device *dev) 1922 { 1923 struct smsc911x_data *pdata = netdev_priv(dev); 1924 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); 1925 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); 1926 1927 dev->dev_addr[0] = (u8)(mac_low32); 1928 dev->dev_addr[1] = (u8)(mac_low32 >> 8); 1929 dev->dev_addr[2] = (u8)(mac_low32 >> 16); 1930 dev->dev_addr[3] = (u8)(mac_low32 >> 24); 1931 dev->dev_addr[4] = (u8)(mac_high16); 1932 dev->dev_addr[5] = (u8)(mac_high16 >> 8); 1933 } 1934 1935 /* Initializing private device structures, only called from probe */ 1936 static int __devinit smsc911x_init(struct net_device *dev) 1937 { 1938 struct smsc911x_data *pdata = netdev_priv(dev); 1939 unsigned int byte_test; 1940 1941 SMSC_TRACE(pdata, probe, "Driver Parameters:"); 1942 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX", 1943 (unsigned long)pdata->ioaddr); 1944 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq); 1945 SMSC_TRACE(pdata, probe, "PHY will be autodetected."); 1946 1947 spin_lock_init(&pdata->dev_lock); 1948 spin_lock_init(&pdata->mac_lock); 1949 1950 if (pdata->ioaddr == 0) { 1951 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000"); 1952 return -ENODEV; 1953 } 1954 1955 /* Check byte ordering */ 1956 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 1957 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test); 1958 if (byte_test == 0x43218765) { 1959 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, " 1960 "applying WORD_SWAP"); 1961 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff); 1962 1963 /* 1 dummy read of BYTE_TEST is needed after a write to 1964 * WORD_SWAP before its contents are valid */ 1965 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 1966 1967 byte_test = smsc911x_reg_read(pdata, BYTE_TEST); 1968 } 1969 1970 if (byte_test != 0x87654321) { 1971 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test); 1972 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) { 1973 SMSC_WARN(pdata, probe, 1974 "top 16 bits equal to bottom 16 bits"); 1975 SMSC_TRACE(pdata, probe, 1976 "This may mean the chip is set " 1977 "for 32 bit while the bus is reading 16 bit"); 1978 } 1979 return -ENODEV; 1980 } 1981 1982 /* Default generation to zero (all workarounds apply) */ 1983 pdata->generation = 0; 1984 1985 pdata->idrev = smsc911x_reg_read(pdata, ID_REV); 1986 switch (pdata->idrev & 0xFFFF0000) { 1987 case 0x01180000: 1988 case 0x01170000: 1989 case 0x01160000: 1990 case 0x01150000: 1991 case 0x218A0000: 1992 /* LAN911[5678] family */ 1993 pdata->generation = pdata->idrev & 0x0000FFFF; 1994 break; 1995 1996 case 0x118A0000: 1997 case 0x117A0000: 1998 case 0x116A0000: 1999 case 0x115A0000: 2000 /* LAN921[5678] family */ 2001 pdata->generation = 3; 2002 break; 2003 2004 case 0x92100000: 2005 case 0x92110000: 2006 case 0x92200000: 2007 case 0x92210000: 2008 /* LAN9210/LAN9211/LAN9220/LAN9221 */ 2009 pdata->generation = 4; 2010 break; 2011 2012 default: 2013 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X", 2014 pdata->idrev); 2015 return -ENODEV; 2016 } 2017 2018 SMSC_TRACE(pdata, probe, 2019 "LAN911x identified, idrev: 0x%08X, generation: %d", 2020 pdata->idrev, pdata->generation); 2021 2022 if (pdata->generation == 0) 2023 SMSC_WARN(pdata, probe, 2024 "This driver is not intended for this chip revision"); 2025 2026 /* workaround for platforms without an eeprom, where the mac address 2027 * is stored elsewhere and set by the bootloader. This saves the 2028 * mac address before resetting the device */ 2029 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { 2030 spin_lock_irq(&pdata->mac_lock); 2031 smsc911x_read_mac_address(dev); 2032 spin_unlock_irq(&pdata->mac_lock); 2033 } 2034 2035 /* Reset the LAN911x */ 2036 if (smsc911x_soft_reset(pdata)) 2037 return -ENODEV; 2038 2039 /* Disable all interrupt sources until we bring the device up */ 2040 smsc911x_reg_write(pdata, INT_EN, 0); 2041 2042 ether_setup(dev); 2043 dev->flags |= IFF_MULTICAST; 2044 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT); 2045 dev->netdev_ops = &smsc911x_netdev_ops; 2046 dev->ethtool_ops = &smsc911x_ethtool_ops; 2047 2048 return 0; 2049 } 2050 2051 static int __devexit smsc911x_drv_remove(struct platform_device *pdev) 2052 { 2053 struct net_device *dev; 2054 struct smsc911x_data *pdata; 2055 struct resource *res; 2056 2057 dev = platform_get_drvdata(pdev); 2058 BUG_ON(!dev); 2059 pdata = netdev_priv(dev); 2060 BUG_ON(!pdata); 2061 BUG_ON(!pdata->ioaddr); 2062 BUG_ON(!pdata->phy_dev); 2063 2064 SMSC_TRACE(pdata, ifdown, "Stopping driver"); 2065 2066 phy_disconnect(pdata->phy_dev); 2067 pdata->phy_dev = NULL; 2068 mdiobus_unregister(pdata->mii_bus); 2069 mdiobus_free(pdata->mii_bus); 2070 2071 platform_set_drvdata(pdev, NULL); 2072 unregister_netdev(dev); 2073 free_irq(dev->irq, dev); 2074 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2075 "smsc911x-memory"); 2076 if (!res) 2077 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2078 2079 release_mem_region(res->start, resource_size(res)); 2080 2081 iounmap(pdata->ioaddr); 2082 2083 free_netdev(dev); 2084 2085 return 0; 2086 } 2087 2088 /* standard register acces */ 2089 static const struct smsc911x_ops standard_smsc911x_ops = { 2090 .reg_read = __smsc911x_reg_read, 2091 .reg_write = __smsc911x_reg_write, 2092 .rx_readfifo = smsc911x_rx_readfifo, 2093 .tx_writefifo = smsc911x_tx_writefifo, 2094 }; 2095 2096 /* shifted register access */ 2097 static const struct smsc911x_ops shifted_smsc911x_ops = { 2098 .reg_read = __smsc911x_reg_read_shift, 2099 .reg_write = __smsc911x_reg_write_shift, 2100 .rx_readfifo = smsc911x_rx_readfifo_shift, 2101 .tx_writefifo = smsc911x_tx_writefifo_shift, 2102 }; 2103 2104 #ifdef CONFIG_OF 2105 static int __devinit smsc911x_probe_config_dt( 2106 struct smsc911x_platform_config *config, 2107 struct device_node *np) 2108 { 2109 const char *mac; 2110 u32 width = 0; 2111 2112 if (!np) 2113 return -ENODEV; 2114 2115 config->phy_interface = of_get_phy_mode(np); 2116 2117 mac = of_get_mac_address(np); 2118 if (mac) 2119 memcpy(config->mac, mac, ETH_ALEN); 2120 2121 of_property_read_u32(np, "reg-shift", &config->shift); 2122 2123 of_property_read_u32(np, "reg-io-width", &width); 2124 if (width == 4) 2125 config->flags |= SMSC911X_USE_32BIT; 2126 else 2127 config->flags |= SMSC911X_USE_16BIT; 2128 2129 if (of_get_property(np, "smsc,irq-active-high", NULL)) 2130 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH; 2131 2132 if (of_get_property(np, "smsc,irq-push-pull", NULL)) 2133 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL; 2134 2135 if (of_get_property(np, "smsc,force-internal-phy", NULL)) 2136 config->flags |= SMSC911X_FORCE_INTERNAL_PHY; 2137 2138 if (of_get_property(np, "smsc,force-external-phy", NULL)) 2139 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY; 2140 2141 if (of_get_property(np, "smsc,save-mac-address", NULL)) 2142 config->flags |= SMSC911X_SAVE_MAC_ADDRESS; 2143 2144 return 0; 2145 } 2146 #else 2147 static inline int smsc911x_probe_config_dt( 2148 struct smsc911x_platform_config *config, 2149 struct device_node *np) 2150 { 2151 return -ENODEV; 2152 } 2153 #endif /* CONFIG_OF */ 2154 2155 static int __devinit smsc911x_drv_probe(struct platform_device *pdev) 2156 { 2157 struct device_node *np = pdev->dev.of_node; 2158 struct net_device *dev; 2159 struct smsc911x_data *pdata; 2160 struct smsc911x_platform_config *config = pdev->dev.platform_data; 2161 struct resource *res, *irq_res; 2162 unsigned int intcfg = 0; 2163 int res_size, irq_flags; 2164 int retval; 2165 2166 pr_info("Driver version %s\n", SMSC_DRV_VERSION); 2167 2168 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 2169 "smsc911x-memory"); 2170 if (!res) 2171 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2172 if (!res) { 2173 pr_warn("Could not allocate resource\n"); 2174 retval = -ENODEV; 2175 goto out_0; 2176 } 2177 res_size = resource_size(res); 2178 2179 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 2180 if (!irq_res) { 2181 pr_warn("Could not allocate irq resource\n"); 2182 retval = -ENODEV; 2183 goto out_0; 2184 } 2185 2186 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) { 2187 retval = -EBUSY; 2188 goto out_0; 2189 } 2190 2191 dev = alloc_etherdev(sizeof(struct smsc911x_data)); 2192 if (!dev) { 2193 pr_warn("Could not allocate device\n"); 2194 retval = -ENOMEM; 2195 goto out_release_io_1; 2196 } 2197 2198 SET_NETDEV_DEV(dev, &pdev->dev); 2199 2200 pdata = netdev_priv(dev); 2201 2202 dev->irq = irq_res->start; 2203 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK; 2204 pdata->ioaddr = ioremap_nocache(res->start, res_size); 2205 2206 pdata->dev = dev; 2207 pdata->msg_enable = ((1 << debug) - 1); 2208 2209 if (pdata->ioaddr == NULL) { 2210 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid"); 2211 retval = -ENOMEM; 2212 goto out_free_netdev_2; 2213 } 2214 2215 retval = smsc911x_probe_config_dt(&pdata->config, np); 2216 if (retval && config) { 2217 /* copy config parameters across to pdata */ 2218 memcpy(&pdata->config, config, sizeof(pdata->config)); 2219 retval = 0; 2220 } 2221 2222 if (retval) { 2223 SMSC_WARN(pdata, probe, "Error smsc911x config not found"); 2224 goto out_unmap_io_3; 2225 } 2226 2227 /* assume standard, non-shifted, access to HW registers */ 2228 pdata->ops = &standard_smsc911x_ops; 2229 /* apply the right access if shifting is needed */ 2230 if (pdata->config.shift) 2231 pdata->ops = &shifted_smsc911x_ops; 2232 2233 retval = smsc911x_init(dev); 2234 if (retval < 0) 2235 goto out_unmap_io_3; 2236 2237 /* configure irq polarity and type before connecting isr */ 2238 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH) 2239 intcfg |= INT_CFG_IRQ_POL_; 2240 2241 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL) 2242 intcfg |= INT_CFG_IRQ_TYPE_; 2243 2244 smsc911x_reg_write(pdata, INT_CFG, intcfg); 2245 2246 /* Ensure interrupts are globally disabled before connecting ISR */ 2247 smsc911x_reg_write(pdata, INT_EN, 0); 2248 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); 2249 2250 retval = request_irq(dev->irq, smsc911x_irqhandler, 2251 irq_flags | IRQF_SHARED, dev->name, dev); 2252 if (retval) { 2253 SMSC_WARN(pdata, probe, 2254 "Unable to claim requested irq: %d", dev->irq); 2255 goto out_unmap_io_3; 2256 } 2257 2258 platform_set_drvdata(pdev, dev); 2259 2260 retval = register_netdev(dev); 2261 if (retval) { 2262 SMSC_WARN(pdata, probe, "Error %i registering device", retval); 2263 goto out_unset_drvdata_4; 2264 } else { 2265 SMSC_TRACE(pdata, probe, 2266 "Network interface: \"%s\"", dev->name); 2267 } 2268 2269 retval = smsc911x_mii_init(pdev, dev); 2270 if (retval) { 2271 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval); 2272 goto out_unregister_netdev_5; 2273 } 2274 2275 spin_lock_irq(&pdata->mac_lock); 2276 2277 /* Check if mac address has been specified when bringing interface up */ 2278 if (is_valid_ether_addr(dev->dev_addr)) { 2279 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2280 SMSC_TRACE(pdata, probe, 2281 "MAC Address is specified by configuration"); 2282 } else if (is_valid_ether_addr(pdata->config.mac)) { 2283 memcpy(dev->dev_addr, pdata->config.mac, 6); 2284 SMSC_TRACE(pdata, probe, 2285 "MAC Address specified by platform data"); 2286 } else { 2287 /* Try reading mac address from device. if EEPROM is present 2288 * it will already have been set */ 2289 smsc_get_mac(dev); 2290 2291 if (is_valid_ether_addr(dev->dev_addr)) { 2292 /* eeprom values are valid so use them */ 2293 SMSC_TRACE(pdata, probe, 2294 "Mac Address is read from LAN911x EEPROM"); 2295 } else { 2296 /* eeprom values are invalid, generate random MAC */ 2297 random_ether_addr(dev->dev_addr); 2298 smsc911x_set_hw_mac_address(pdata, dev->dev_addr); 2299 SMSC_TRACE(pdata, probe, 2300 "MAC Address is set to random_ether_addr"); 2301 } 2302 } 2303 2304 spin_unlock_irq(&pdata->mac_lock); 2305 2306 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); 2307 2308 return 0; 2309 2310 out_unregister_netdev_5: 2311 unregister_netdev(dev); 2312 out_unset_drvdata_4: 2313 platform_set_drvdata(pdev, NULL); 2314 free_irq(dev->irq, dev); 2315 out_unmap_io_3: 2316 iounmap(pdata->ioaddr); 2317 out_free_netdev_2: 2318 free_netdev(dev); 2319 out_release_io_1: 2320 release_mem_region(res->start, resource_size(res)); 2321 out_0: 2322 return retval; 2323 } 2324 2325 #ifdef CONFIG_PM 2326 /* This implementation assumes the devices remains powered on its VDDVARIO 2327 * pins during suspend. */ 2328 2329 /* TODO: implement freeze/thaw callbacks for hibernation.*/ 2330 2331 static int smsc911x_suspend(struct device *dev) 2332 { 2333 struct net_device *ndev = dev_get_drvdata(dev); 2334 struct smsc911x_data *pdata = netdev_priv(ndev); 2335 2336 /* enable wake on LAN, energy detection and the external PME 2337 * signal. */ 2338 smsc911x_reg_write(pdata, PMT_CTRL, 2339 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ | 2340 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_); 2341 2342 return 0; 2343 } 2344 2345 static int smsc911x_resume(struct device *dev) 2346 { 2347 struct net_device *ndev = dev_get_drvdata(dev); 2348 struct smsc911x_data *pdata = netdev_priv(ndev); 2349 unsigned int to = 100; 2350 2351 /* Note 3.11 from the datasheet: 2352 * "When the LAN9220 is in a power saving state, a write of any 2353 * data to the BYTE_TEST register will wake-up the device." 2354 */ 2355 smsc911x_reg_write(pdata, BYTE_TEST, 0); 2356 2357 /* poll the READY bit in PMT_CTRL. Any other access to the device is 2358 * forbidden while this bit isn't set. Try for 100ms and return -EIO 2359 * if it failed. */ 2360 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) 2361 udelay(1000); 2362 2363 return (to == 0) ? -EIO : 0; 2364 } 2365 2366 static const struct dev_pm_ops smsc911x_pm_ops = { 2367 .suspend = smsc911x_suspend, 2368 .resume = smsc911x_resume, 2369 }; 2370 2371 #define SMSC911X_PM_OPS (&smsc911x_pm_ops) 2372 2373 #else 2374 #define SMSC911X_PM_OPS NULL 2375 #endif 2376 2377 static const struct of_device_id smsc911x_dt_ids[] = { 2378 { .compatible = "smsc,lan9115", }, 2379 { /* sentinel */ } 2380 }; 2381 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids); 2382 2383 static struct platform_driver smsc911x_driver = { 2384 .probe = smsc911x_drv_probe, 2385 .remove = __devexit_p(smsc911x_drv_remove), 2386 .driver = { 2387 .name = SMSC_CHIPNAME, 2388 .owner = THIS_MODULE, 2389 .pm = SMSC911X_PM_OPS, 2390 .of_match_table = smsc911x_dt_ids, 2391 }, 2392 }; 2393 2394 /* Entry point for loading the module */ 2395 static int __init smsc911x_init_module(void) 2396 { 2397 SMSC_INITIALIZE(); 2398 return platform_driver_register(&smsc911x_driver); 2399 } 2400 2401 /* entry point for unloading the module */ 2402 static void __exit smsc911x_cleanup_module(void) 2403 { 2404 platform_driver_unregister(&smsc911x_driver); 2405 } 2406 2407 module_init(smsc911x_init_module); 2408 module_exit(smsc911x_cleanup_module); 2409