1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Davicom DM9000 Fast Ethernet driver for Linux. 4 * Copyright (C) 1997 Sten Wang 5 * 6 * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved. 7 * 8 * Additional updates, Copyright: 9 * Ben Dooks <ben@simtec.co.uk> 10 * Sascha Hauer <s.hauer@pengutronix.de> 11 */ 12 13 #include <linux/module.h> 14 #include <linux/ioport.h> 15 #include <linux/netdevice.h> 16 #include <linux/etherdevice.h> 17 #include <linux/interrupt.h> 18 #include <linux/skbuff.h> 19 #include <linux/spinlock.h> 20 #include <linux/crc32.h> 21 #include <linux/mii.h> 22 #include <linux/of.h> 23 #include <linux/of_net.h> 24 #include <linux/ethtool.h> 25 #include <linux/dm9000.h> 26 #include <linux/delay.h> 27 #include <linux/platform_device.h> 28 #include <linux/irq.h> 29 #include <linux/slab.h> 30 #include <linux/regulator/consumer.h> 31 #include <linux/gpio.h> 32 #include <linux/of_gpio.h> 33 34 #include <asm/delay.h> 35 #include <asm/irq.h> 36 #include <asm/io.h> 37 38 #include "dm9000.h" 39 40 /* Board/System/Debug information/definition ---------------- */ 41 42 #define DM9000_PHY 0x40 /* PHY address 0x01 */ 43 44 #define CARDNAME "dm9000" 45 46 /* 47 * Transmit timeout, default 5 seconds. 48 */ 49 static int watchdog = 5000; 50 module_param(watchdog, int, 0400); 51 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); 52 53 /* 54 * Debug messages level 55 */ 56 static int debug; 57 module_param(debug, int, 0644); 58 MODULE_PARM_DESC(debug, "dm9000 debug level (0-6)"); 59 60 /* DM9000 register address locking. 61 * 62 * The DM9000 uses an address register to control where data written 63 * to the data register goes. This means that the address register 64 * must be preserved over interrupts or similar calls. 65 * 66 * During interrupt and other critical calls, a spinlock is used to 67 * protect the system, but the calls themselves save the address 68 * in the address register in case they are interrupting another 69 * access to the device. 70 * 71 * For general accesses a lock is provided so that calls which are 72 * allowed to sleep are serialised so that the address register does 73 * not need to be saved. This lock also serves to serialise access 74 * to the EEPROM and PHY access registers which are shared between 75 * these two devices. 76 */ 77 78 /* The driver supports the original DM9000E, and now the two newer 79 * devices, DM9000A and DM9000B. 80 */ 81 82 enum dm9000_type { 83 TYPE_DM9000E, /* original DM9000 */ 84 TYPE_DM9000A, 85 TYPE_DM9000B 86 }; 87 88 /* Structure/enum declaration ------------------------------- */ 89 struct board_info { 90 91 void __iomem *io_addr; /* Register I/O base address */ 92 void __iomem *io_data; /* Data I/O address */ 93 u16 irq; /* IRQ */ 94 95 u16 tx_pkt_cnt; 96 u16 queue_pkt_len; 97 u16 queue_start_addr; 98 u16 queue_ip_summed; 99 u16 dbug_cnt; 100 u8 io_mode; /* 0:word, 2:byte */ 101 u8 phy_addr; 102 u8 imr_all; 103 104 unsigned int flags; 105 unsigned int in_timeout:1; 106 unsigned int in_suspend:1; 107 unsigned int wake_supported:1; 108 109 enum dm9000_type type; 110 111 void (*inblk)(void __iomem *port, void *data, int length); 112 void (*outblk)(void __iomem *port, void *data, int length); 113 void (*dumpblk)(void __iomem *port, int length); 114 115 struct device *dev; /* parent device */ 116 117 struct resource *addr_res; /* resources found */ 118 struct resource *data_res; 119 struct resource *addr_req; /* resources requested */ 120 struct resource *data_req; 121 122 int irq_wake; 123 124 struct mutex addr_lock; /* phy and eeprom access lock */ 125 126 struct delayed_work phy_poll; 127 struct net_device *ndev; 128 129 spinlock_t lock; 130 131 struct mii_if_info mii; 132 u32 msg_enable; 133 u32 wake_state; 134 135 int ip_summed; 136 }; 137 138 /* debug code */ 139 140 #define dm9000_dbg(db, lev, msg...) do { \ 141 if ((lev) < debug) { \ 142 dev_dbg(db->dev, msg); \ 143 } \ 144 } while (0) 145 146 static inline struct board_info *to_dm9000_board(struct net_device *dev) 147 { 148 return netdev_priv(dev); 149 } 150 151 /* DM9000 network board routine ---------------------------- */ 152 153 /* 154 * Read a byte from I/O port 155 */ 156 static u8 157 ior(struct board_info *db, int reg) 158 { 159 writeb(reg, db->io_addr); 160 return readb(db->io_data); 161 } 162 163 /* 164 * Write a byte to I/O port 165 */ 166 167 static void 168 iow(struct board_info *db, int reg, int value) 169 { 170 writeb(reg, db->io_addr); 171 writeb(value, db->io_data); 172 } 173 174 static void 175 dm9000_reset(struct board_info *db) 176 { 177 dev_dbg(db->dev, "resetting device\n"); 178 179 /* Reset DM9000, see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 180 * The essential point is that we have to do a double reset, and the 181 * instruction is to set LBK into MAC internal loopback mode. 182 */ 183 iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK); 184 udelay(100); /* Application note says at least 20 us */ 185 if (ior(db, DM9000_NCR) & 1) 186 dev_err(db->dev, "dm9000 did not respond to first reset\n"); 187 188 iow(db, DM9000_NCR, 0); 189 iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK); 190 udelay(100); 191 if (ior(db, DM9000_NCR) & 1) 192 dev_err(db->dev, "dm9000 did not respond to second reset\n"); 193 } 194 195 /* routines for sending block to chip */ 196 197 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count) 198 { 199 iowrite8_rep(reg, data, count); 200 } 201 202 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count) 203 { 204 iowrite16_rep(reg, data, (count+1) >> 1); 205 } 206 207 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count) 208 { 209 iowrite32_rep(reg, data, (count+3) >> 2); 210 } 211 212 /* input block from chip to memory */ 213 214 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count) 215 { 216 ioread8_rep(reg, data, count); 217 } 218 219 220 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count) 221 { 222 ioread16_rep(reg, data, (count+1) >> 1); 223 } 224 225 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count) 226 { 227 ioread32_rep(reg, data, (count+3) >> 2); 228 } 229 230 /* dump block from chip to null */ 231 232 static void dm9000_dumpblk_8bit(void __iomem *reg, int count) 233 { 234 int i; 235 int tmp; 236 237 for (i = 0; i < count; i++) 238 tmp = readb(reg); 239 } 240 241 static void dm9000_dumpblk_16bit(void __iomem *reg, int count) 242 { 243 int i; 244 int tmp; 245 246 count = (count + 1) >> 1; 247 248 for (i = 0; i < count; i++) 249 tmp = readw(reg); 250 } 251 252 static void dm9000_dumpblk_32bit(void __iomem *reg, int count) 253 { 254 int i; 255 int tmp; 256 257 count = (count + 3) >> 2; 258 259 for (i = 0; i < count; i++) 260 tmp = readl(reg); 261 } 262 263 /* 264 * Sleep, either by using msleep() or if we are suspending, then 265 * use mdelay() to sleep. 266 */ 267 static void dm9000_msleep(struct board_info *db, unsigned int ms) 268 { 269 if (db->in_suspend || db->in_timeout) 270 mdelay(ms); 271 else 272 msleep(ms); 273 } 274 275 /* Read a word from phyxcer */ 276 static int 277 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg) 278 { 279 struct board_info *db = netdev_priv(dev); 280 unsigned long flags; 281 unsigned int reg_save; 282 int ret; 283 284 mutex_lock(&db->addr_lock); 285 286 spin_lock_irqsave(&db->lock, flags); 287 288 /* Save previous register address */ 289 reg_save = readb(db->io_addr); 290 291 /* Fill the phyxcer register into REG_0C */ 292 iow(db, DM9000_EPAR, DM9000_PHY | reg); 293 294 /* Issue phyxcer read command */ 295 iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS); 296 297 writeb(reg_save, db->io_addr); 298 spin_unlock_irqrestore(&db->lock, flags); 299 300 dm9000_msleep(db, 1); /* Wait read complete */ 301 302 spin_lock_irqsave(&db->lock, flags); 303 reg_save = readb(db->io_addr); 304 305 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */ 306 307 /* The read data keeps on REG_0D & REG_0E */ 308 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL); 309 310 /* restore the previous address */ 311 writeb(reg_save, db->io_addr); 312 spin_unlock_irqrestore(&db->lock, flags); 313 314 mutex_unlock(&db->addr_lock); 315 316 dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret); 317 return ret; 318 } 319 320 /* Write a word to phyxcer */ 321 static void 322 dm9000_phy_write(struct net_device *dev, 323 int phyaddr_unused, int reg, int value) 324 { 325 struct board_info *db = netdev_priv(dev); 326 unsigned long flags; 327 unsigned long reg_save; 328 329 dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value); 330 if (!db->in_timeout) 331 mutex_lock(&db->addr_lock); 332 333 spin_lock_irqsave(&db->lock, flags); 334 335 /* Save previous register address */ 336 reg_save = readb(db->io_addr); 337 338 /* Fill the phyxcer register into REG_0C */ 339 iow(db, DM9000_EPAR, DM9000_PHY | reg); 340 341 /* Fill the written data into REG_0D & REG_0E */ 342 iow(db, DM9000_EPDRL, value); 343 iow(db, DM9000_EPDRH, value >> 8); 344 345 /* Issue phyxcer write command */ 346 iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW); 347 348 writeb(reg_save, db->io_addr); 349 spin_unlock_irqrestore(&db->lock, flags); 350 351 dm9000_msleep(db, 1); /* Wait write complete */ 352 353 spin_lock_irqsave(&db->lock, flags); 354 reg_save = readb(db->io_addr); 355 356 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */ 357 358 /* restore the previous address */ 359 writeb(reg_save, db->io_addr); 360 361 spin_unlock_irqrestore(&db->lock, flags); 362 if (!db->in_timeout) 363 mutex_unlock(&db->addr_lock); 364 } 365 366 /* dm9000_set_io 367 * 368 * select the specified set of io routines to use with the 369 * device 370 */ 371 372 static void dm9000_set_io(struct board_info *db, int byte_width) 373 { 374 /* use the size of the data resource to work out what IO 375 * routines we want to use 376 */ 377 378 switch (byte_width) { 379 case 1: 380 db->dumpblk = dm9000_dumpblk_8bit; 381 db->outblk = dm9000_outblk_8bit; 382 db->inblk = dm9000_inblk_8bit; 383 break; 384 385 386 case 3: 387 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n"); 388 fallthrough; 389 case 2: 390 db->dumpblk = dm9000_dumpblk_16bit; 391 db->outblk = dm9000_outblk_16bit; 392 db->inblk = dm9000_inblk_16bit; 393 break; 394 395 case 4: 396 default: 397 db->dumpblk = dm9000_dumpblk_32bit; 398 db->outblk = dm9000_outblk_32bit; 399 db->inblk = dm9000_inblk_32bit; 400 break; 401 } 402 } 403 404 static void dm9000_schedule_poll(struct board_info *db) 405 { 406 if (db->type == TYPE_DM9000E) 407 schedule_delayed_work(&db->phy_poll, HZ * 2); 408 } 409 410 static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd) 411 { 412 struct board_info *dm = to_dm9000_board(dev); 413 414 if (!netif_running(dev)) 415 return -EINVAL; 416 417 return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL); 418 } 419 420 static unsigned int 421 dm9000_read_locked(struct board_info *db, int reg) 422 { 423 unsigned long flags; 424 unsigned int ret; 425 426 spin_lock_irqsave(&db->lock, flags); 427 ret = ior(db, reg); 428 spin_unlock_irqrestore(&db->lock, flags); 429 430 return ret; 431 } 432 433 static int dm9000_wait_eeprom(struct board_info *db) 434 { 435 unsigned int status; 436 int timeout = 8; /* wait max 8msec */ 437 438 /* The DM9000 data sheets say we should be able to 439 * poll the ERRE bit in EPCR to wait for the EEPROM 440 * operation. From testing several chips, this bit 441 * does not seem to work. 442 * 443 * We attempt to use the bit, but fall back to the 444 * timeout (which is why we do not return an error 445 * on expiry) to say that the EEPROM operation has 446 * completed. 447 */ 448 449 while (1) { 450 status = dm9000_read_locked(db, DM9000_EPCR); 451 452 if ((status & EPCR_ERRE) == 0) 453 break; 454 455 msleep(1); 456 457 if (timeout-- < 0) { 458 dev_dbg(db->dev, "timeout waiting EEPROM\n"); 459 break; 460 } 461 } 462 463 return 0; 464 } 465 466 /* 467 * Read a word data from EEPROM 468 */ 469 static void 470 dm9000_read_eeprom(struct board_info *db, int offset, u8 *to) 471 { 472 unsigned long flags; 473 474 if (db->flags & DM9000_PLATF_NO_EEPROM) { 475 to[0] = 0xff; 476 to[1] = 0xff; 477 return; 478 } 479 480 mutex_lock(&db->addr_lock); 481 482 spin_lock_irqsave(&db->lock, flags); 483 484 iow(db, DM9000_EPAR, offset); 485 iow(db, DM9000_EPCR, EPCR_ERPRR); 486 487 spin_unlock_irqrestore(&db->lock, flags); 488 489 dm9000_wait_eeprom(db); 490 491 /* delay for at-least 150uS */ 492 msleep(1); 493 494 spin_lock_irqsave(&db->lock, flags); 495 496 iow(db, DM9000_EPCR, 0x0); 497 498 to[0] = ior(db, DM9000_EPDRL); 499 to[1] = ior(db, DM9000_EPDRH); 500 501 spin_unlock_irqrestore(&db->lock, flags); 502 503 mutex_unlock(&db->addr_lock); 504 } 505 506 /* 507 * Write a word data to SROM 508 */ 509 static void 510 dm9000_write_eeprom(struct board_info *db, int offset, u8 *data) 511 { 512 unsigned long flags; 513 514 if (db->flags & DM9000_PLATF_NO_EEPROM) 515 return; 516 517 mutex_lock(&db->addr_lock); 518 519 spin_lock_irqsave(&db->lock, flags); 520 iow(db, DM9000_EPAR, offset); 521 iow(db, DM9000_EPDRH, data[1]); 522 iow(db, DM9000_EPDRL, data[0]); 523 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW); 524 spin_unlock_irqrestore(&db->lock, flags); 525 526 dm9000_wait_eeprom(db); 527 528 mdelay(1); /* wait at least 150uS to clear */ 529 530 spin_lock_irqsave(&db->lock, flags); 531 iow(db, DM9000_EPCR, 0); 532 spin_unlock_irqrestore(&db->lock, flags); 533 534 mutex_unlock(&db->addr_lock); 535 } 536 537 /* ethtool ops */ 538 539 static void dm9000_get_drvinfo(struct net_device *dev, 540 struct ethtool_drvinfo *info) 541 { 542 struct board_info *dm = to_dm9000_board(dev); 543 544 strlcpy(info->driver, CARDNAME, sizeof(info->driver)); 545 strlcpy(info->bus_info, to_platform_device(dm->dev)->name, 546 sizeof(info->bus_info)); 547 } 548 549 static u32 dm9000_get_msglevel(struct net_device *dev) 550 { 551 struct board_info *dm = to_dm9000_board(dev); 552 553 return dm->msg_enable; 554 } 555 556 static void dm9000_set_msglevel(struct net_device *dev, u32 value) 557 { 558 struct board_info *dm = to_dm9000_board(dev); 559 560 dm->msg_enable = value; 561 } 562 563 static int dm9000_get_link_ksettings(struct net_device *dev, 564 struct ethtool_link_ksettings *cmd) 565 { 566 struct board_info *dm = to_dm9000_board(dev); 567 568 mii_ethtool_get_link_ksettings(&dm->mii, cmd); 569 return 0; 570 } 571 572 static int dm9000_set_link_ksettings(struct net_device *dev, 573 const struct ethtool_link_ksettings *cmd) 574 { 575 struct board_info *dm = to_dm9000_board(dev); 576 577 return mii_ethtool_set_link_ksettings(&dm->mii, cmd); 578 } 579 580 static int dm9000_nway_reset(struct net_device *dev) 581 { 582 struct board_info *dm = to_dm9000_board(dev); 583 return mii_nway_restart(&dm->mii); 584 } 585 586 static int dm9000_set_features(struct net_device *dev, 587 netdev_features_t features) 588 { 589 struct board_info *dm = to_dm9000_board(dev); 590 netdev_features_t changed = dev->features ^ features; 591 unsigned long flags; 592 593 if (!(changed & NETIF_F_RXCSUM)) 594 return 0; 595 596 spin_lock_irqsave(&dm->lock, flags); 597 iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0); 598 spin_unlock_irqrestore(&dm->lock, flags); 599 600 return 0; 601 } 602 603 static u32 dm9000_get_link(struct net_device *dev) 604 { 605 struct board_info *dm = to_dm9000_board(dev); 606 u32 ret; 607 608 if (dm->flags & DM9000_PLATF_EXT_PHY) 609 ret = mii_link_ok(&dm->mii); 610 else 611 ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0; 612 613 return ret; 614 } 615 616 #define DM_EEPROM_MAGIC (0x444D394B) 617 618 static int dm9000_get_eeprom_len(struct net_device *dev) 619 { 620 return 128; 621 } 622 623 static int dm9000_get_eeprom(struct net_device *dev, 624 struct ethtool_eeprom *ee, u8 *data) 625 { 626 struct board_info *dm = to_dm9000_board(dev); 627 int offset = ee->offset; 628 int len = ee->len; 629 int i; 630 631 /* EEPROM access is aligned to two bytes */ 632 633 if ((len & 1) != 0 || (offset & 1) != 0) 634 return -EINVAL; 635 636 if (dm->flags & DM9000_PLATF_NO_EEPROM) 637 return -ENOENT; 638 639 ee->magic = DM_EEPROM_MAGIC; 640 641 for (i = 0; i < len; i += 2) 642 dm9000_read_eeprom(dm, (offset + i) / 2, data + i); 643 644 return 0; 645 } 646 647 static int dm9000_set_eeprom(struct net_device *dev, 648 struct ethtool_eeprom *ee, u8 *data) 649 { 650 struct board_info *dm = to_dm9000_board(dev); 651 int offset = ee->offset; 652 int len = ee->len; 653 int done; 654 655 /* EEPROM access is aligned to two bytes */ 656 657 if (dm->flags & DM9000_PLATF_NO_EEPROM) 658 return -ENOENT; 659 660 if (ee->magic != DM_EEPROM_MAGIC) 661 return -EINVAL; 662 663 while (len > 0) { 664 if (len & 1 || offset & 1) { 665 int which = offset & 1; 666 u8 tmp[2]; 667 668 dm9000_read_eeprom(dm, offset / 2, tmp); 669 tmp[which] = *data; 670 dm9000_write_eeprom(dm, offset / 2, tmp); 671 672 done = 1; 673 } else { 674 dm9000_write_eeprom(dm, offset / 2, data); 675 done = 2; 676 } 677 678 data += done; 679 offset += done; 680 len -= done; 681 } 682 683 return 0; 684 } 685 686 static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 687 { 688 struct board_info *dm = to_dm9000_board(dev); 689 690 memset(w, 0, sizeof(struct ethtool_wolinfo)); 691 692 /* note, we could probably support wake-phy too */ 693 w->supported = dm->wake_supported ? WAKE_MAGIC : 0; 694 w->wolopts = dm->wake_state; 695 } 696 697 static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 698 { 699 struct board_info *dm = to_dm9000_board(dev); 700 unsigned long flags; 701 u32 opts = w->wolopts; 702 u32 wcr = 0; 703 704 if (!dm->wake_supported) 705 return -EOPNOTSUPP; 706 707 if (opts & ~WAKE_MAGIC) 708 return -EINVAL; 709 710 if (opts & WAKE_MAGIC) 711 wcr |= WCR_MAGICEN; 712 713 mutex_lock(&dm->addr_lock); 714 715 spin_lock_irqsave(&dm->lock, flags); 716 iow(dm, DM9000_WCR, wcr); 717 spin_unlock_irqrestore(&dm->lock, flags); 718 719 mutex_unlock(&dm->addr_lock); 720 721 if (dm->wake_state != opts) { 722 /* change in wol state, update IRQ state */ 723 724 if (!dm->wake_state) 725 irq_set_irq_wake(dm->irq_wake, 1); 726 else if (dm->wake_state && !opts) 727 irq_set_irq_wake(dm->irq_wake, 0); 728 } 729 730 dm->wake_state = opts; 731 return 0; 732 } 733 734 static const struct ethtool_ops dm9000_ethtool_ops = { 735 .get_drvinfo = dm9000_get_drvinfo, 736 .get_msglevel = dm9000_get_msglevel, 737 .set_msglevel = dm9000_set_msglevel, 738 .nway_reset = dm9000_nway_reset, 739 .get_link = dm9000_get_link, 740 .get_wol = dm9000_get_wol, 741 .set_wol = dm9000_set_wol, 742 .get_eeprom_len = dm9000_get_eeprom_len, 743 .get_eeprom = dm9000_get_eeprom, 744 .set_eeprom = dm9000_set_eeprom, 745 .get_link_ksettings = dm9000_get_link_ksettings, 746 .set_link_ksettings = dm9000_set_link_ksettings, 747 }; 748 749 static void dm9000_show_carrier(struct board_info *db, 750 unsigned carrier, unsigned nsr) 751 { 752 int lpa; 753 struct net_device *ndev = db->ndev; 754 struct mii_if_info *mii = &db->mii; 755 unsigned ncr = dm9000_read_locked(db, DM9000_NCR); 756 757 if (carrier) { 758 lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); 759 dev_info(db->dev, 760 "%s: link up, %dMbps, %s-duplex, lpa 0x%04X\n", 761 ndev->name, (nsr & NSR_SPEED) ? 10 : 100, 762 (ncr & NCR_FDX) ? "full" : "half", lpa); 763 } else { 764 dev_info(db->dev, "%s: link down\n", ndev->name); 765 } 766 } 767 768 static void 769 dm9000_poll_work(struct work_struct *w) 770 { 771 struct delayed_work *dw = to_delayed_work(w); 772 struct board_info *db = container_of(dw, struct board_info, phy_poll); 773 struct net_device *ndev = db->ndev; 774 775 if (db->flags & DM9000_PLATF_SIMPLE_PHY && 776 !(db->flags & DM9000_PLATF_EXT_PHY)) { 777 unsigned nsr = dm9000_read_locked(db, DM9000_NSR); 778 unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0; 779 unsigned new_carrier; 780 781 new_carrier = (nsr & NSR_LINKST) ? 1 : 0; 782 783 if (old_carrier != new_carrier) { 784 if (netif_msg_link(db)) 785 dm9000_show_carrier(db, new_carrier, nsr); 786 787 if (!new_carrier) 788 netif_carrier_off(ndev); 789 else 790 netif_carrier_on(ndev); 791 } 792 } else 793 mii_check_media(&db->mii, netif_msg_link(db), 0); 794 795 if (netif_running(ndev)) 796 dm9000_schedule_poll(db); 797 } 798 799 /* dm9000_release_board 800 * 801 * release a board, and any mapped resources 802 */ 803 804 static void 805 dm9000_release_board(struct platform_device *pdev, struct board_info *db) 806 { 807 /* unmap our resources */ 808 809 iounmap(db->io_addr); 810 iounmap(db->io_data); 811 812 /* release the resources */ 813 814 if (db->data_req) 815 release_resource(db->data_req); 816 kfree(db->data_req); 817 818 if (db->addr_req) 819 release_resource(db->addr_req); 820 kfree(db->addr_req); 821 } 822 823 static unsigned char dm9000_type_to_char(enum dm9000_type type) 824 { 825 switch (type) { 826 case TYPE_DM9000E: return 'e'; 827 case TYPE_DM9000A: return 'a'; 828 case TYPE_DM9000B: return 'b'; 829 } 830 831 return '?'; 832 } 833 834 /* 835 * Set DM9000 multicast address 836 */ 837 static void 838 dm9000_hash_table_unlocked(struct net_device *dev) 839 { 840 struct board_info *db = netdev_priv(dev); 841 struct netdev_hw_addr *ha; 842 int i, oft; 843 u32 hash_val; 844 u16 hash_table[4] = { 0, 0, 0, 0x8000 }; /* broadcast address */ 845 u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN; 846 847 dm9000_dbg(db, 1, "entering %s\n", __func__); 848 849 for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++) 850 iow(db, oft, dev->dev_addr[i]); 851 852 if (dev->flags & IFF_PROMISC) 853 rcr |= RCR_PRMSC; 854 855 if (dev->flags & IFF_ALLMULTI) 856 rcr |= RCR_ALL; 857 858 /* the multicast address in Hash Table : 64 bits */ 859 netdev_for_each_mc_addr(ha, dev) { 860 hash_val = ether_crc_le(6, ha->addr) & 0x3f; 861 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16); 862 } 863 864 /* Write the hash table to MAC MD table */ 865 for (i = 0, oft = DM9000_MAR; i < 4; i++) { 866 iow(db, oft++, hash_table[i]); 867 iow(db, oft++, hash_table[i] >> 8); 868 } 869 870 iow(db, DM9000_RCR, rcr); 871 } 872 873 static void 874 dm9000_hash_table(struct net_device *dev) 875 { 876 struct board_info *db = netdev_priv(dev); 877 unsigned long flags; 878 879 spin_lock_irqsave(&db->lock, flags); 880 dm9000_hash_table_unlocked(dev); 881 spin_unlock_irqrestore(&db->lock, flags); 882 } 883 884 static void 885 dm9000_mask_interrupts(struct board_info *db) 886 { 887 iow(db, DM9000_IMR, IMR_PAR); 888 } 889 890 static void 891 dm9000_unmask_interrupts(struct board_info *db) 892 { 893 iow(db, DM9000_IMR, db->imr_all); 894 } 895 896 /* 897 * Initialize dm9000 board 898 */ 899 static void 900 dm9000_init_dm9000(struct net_device *dev) 901 { 902 struct board_info *db = netdev_priv(dev); 903 unsigned int imr; 904 unsigned int ncr; 905 906 dm9000_dbg(db, 1, "entering %s\n", __func__); 907 908 dm9000_reset(db); 909 dm9000_mask_interrupts(db); 910 911 /* I/O mode */ 912 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */ 913 914 /* Checksum mode */ 915 if (dev->hw_features & NETIF_F_RXCSUM) 916 iow(db, DM9000_RCSR, 917 (dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0); 918 919 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */ 920 iow(db, DM9000_GPR, 0); 921 922 /* If we are dealing with DM9000B, some extra steps are required: a 923 * manual phy reset, and setting init params. 924 */ 925 if (db->type == TYPE_DM9000B) { 926 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); 927 dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM); 928 } 929 930 ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0; 931 932 /* if wol is needed, then always set NCR_WAKEEN otherwise we end 933 * up dumping the wake events if we disable this. There is already 934 * a wake-mask in DM9000_WCR */ 935 if (db->wake_supported) 936 ncr |= NCR_WAKEEN; 937 938 iow(db, DM9000_NCR, ncr); 939 940 /* Program operating register */ 941 iow(db, DM9000_TCR, 0); /* TX Polling clear */ 942 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */ 943 iow(db, DM9000_FCR, 0xff); /* Flow Control */ 944 iow(db, DM9000_SMCR, 0); /* Special Mode */ 945 /* clear TX status */ 946 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END); 947 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */ 948 949 /* Set address filter table */ 950 dm9000_hash_table_unlocked(dev); 951 952 imr = IMR_PAR | IMR_PTM | IMR_PRM; 953 if (db->type != TYPE_DM9000E) 954 imr |= IMR_LNKCHNG; 955 956 db->imr_all = imr; 957 958 /* Init Driver variable */ 959 db->tx_pkt_cnt = 0; 960 db->queue_pkt_len = 0; 961 netif_trans_update(dev); 962 } 963 964 /* Our watchdog timed out. Called by the networking layer */ 965 static void dm9000_timeout(struct net_device *dev, unsigned int txqueue) 966 { 967 struct board_info *db = netdev_priv(dev); 968 u8 reg_save; 969 unsigned long flags; 970 971 /* Save previous register address */ 972 spin_lock_irqsave(&db->lock, flags); 973 db->in_timeout = 1; 974 reg_save = readb(db->io_addr); 975 976 netif_stop_queue(dev); 977 dm9000_init_dm9000(dev); 978 dm9000_unmask_interrupts(db); 979 /* We can accept TX packets again */ 980 netif_trans_update(dev); /* prevent tx timeout */ 981 netif_wake_queue(dev); 982 983 /* Restore previous register address */ 984 writeb(reg_save, db->io_addr); 985 db->in_timeout = 0; 986 spin_unlock_irqrestore(&db->lock, flags); 987 } 988 989 static void dm9000_send_packet(struct net_device *dev, 990 int ip_summed, 991 u16 pkt_len) 992 { 993 struct board_info *dm = to_dm9000_board(dev); 994 995 /* The DM9000 is not smart enough to leave fragmented packets alone. */ 996 if (dm->ip_summed != ip_summed) { 997 if (ip_summed == CHECKSUM_NONE) 998 iow(dm, DM9000_TCCR, 0); 999 else 1000 iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP); 1001 dm->ip_summed = ip_summed; 1002 } 1003 1004 /* Set TX length to DM9000 */ 1005 iow(dm, DM9000_TXPLL, pkt_len); 1006 iow(dm, DM9000_TXPLH, pkt_len >> 8); 1007 1008 /* Issue TX polling command */ 1009 iow(dm, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */ 1010 } 1011 1012 /* 1013 * Hardware start transmission. 1014 * Send a packet to media from the upper layer. 1015 */ 1016 static int 1017 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1018 { 1019 unsigned long flags; 1020 struct board_info *db = netdev_priv(dev); 1021 1022 dm9000_dbg(db, 3, "%s:\n", __func__); 1023 1024 if (db->tx_pkt_cnt > 1) 1025 return NETDEV_TX_BUSY; 1026 1027 spin_lock_irqsave(&db->lock, flags); 1028 1029 /* Move data to DM9000 TX RAM */ 1030 writeb(DM9000_MWCMD, db->io_addr); 1031 1032 (db->outblk)(db->io_data, skb->data, skb->len); 1033 dev->stats.tx_bytes += skb->len; 1034 1035 db->tx_pkt_cnt++; 1036 /* TX control: First packet immediately send, second packet queue */ 1037 if (db->tx_pkt_cnt == 1) { 1038 dm9000_send_packet(dev, skb->ip_summed, skb->len); 1039 } else { 1040 /* Second packet */ 1041 db->queue_pkt_len = skb->len; 1042 db->queue_ip_summed = skb->ip_summed; 1043 netif_stop_queue(dev); 1044 } 1045 1046 spin_unlock_irqrestore(&db->lock, flags); 1047 1048 /* free this SKB */ 1049 dev_consume_skb_any(skb); 1050 1051 return NETDEV_TX_OK; 1052 } 1053 1054 /* 1055 * DM9000 interrupt handler 1056 * receive the packet to upper layer, free the transmitted packet 1057 */ 1058 1059 static void dm9000_tx_done(struct net_device *dev, struct board_info *db) 1060 { 1061 int tx_status = ior(db, DM9000_NSR); /* Got TX status */ 1062 1063 if (tx_status & (NSR_TX2END | NSR_TX1END)) { 1064 /* One packet sent complete */ 1065 db->tx_pkt_cnt--; 1066 dev->stats.tx_packets++; 1067 1068 if (netif_msg_tx_done(db)) 1069 dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status); 1070 1071 /* Queue packet check & send */ 1072 if (db->tx_pkt_cnt > 0) 1073 dm9000_send_packet(dev, db->queue_ip_summed, 1074 db->queue_pkt_len); 1075 netif_wake_queue(dev); 1076 } 1077 } 1078 1079 struct dm9000_rxhdr { 1080 u8 RxPktReady; 1081 u8 RxStatus; 1082 __le16 RxLen; 1083 } __packed; 1084 1085 /* 1086 * Received a packet and pass to upper layer 1087 */ 1088 static void 1089 dm9000_rx(struct net_device *dev) 1090 { 1091 struct board_info *db = netdev_priv(dev); 1092 struct dm9000_rxhdr rxhdr; 1093 struct sk_buff *skb; 1094 u8 rxbyte, *rdptr; 1095 bool GoodPacket; 1096 int RxLen; 1097 1098 /* Check packet ready or not */ 1099 do { 1100 ior(db, DM9000_MRCMDX); /* Dummy read */ 1101 1102 /* Get most updated data */ 1103 rxbyte = readb(db->io_data); 1104 1105 /* Status check: this byte must be 0 or 1 */ 1106 if (rxbyte & DM9000_PKT_ERR) { 1107 dev_warn(db->dev, "status check fail: %d\n", rxbyte); 1108 iow(db, DM9000_RCR, 0x00); /* Stop Device */ 1109 return; 1110 } 1111 1112 if (!(rxbyte & DM9000_PKT_RDY)) 1113 return; 1114 1115 /* A packet ready now & Get status/length */ 1116 GoodPacket = true; 1117 writeb(DM9000_MRCMD, db->io_addr); 1118 1119 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr)); 1120 1121 RxLen = le16_to_cpu(rxhdr.RxLen); 1122 1123 if (netif_msg_rx_status(db)) 1124 dev_dbg(db->dev, "RX: status %02x, length %04x\n", 1125 rxhdr.RxStatus, RxLen); 1126 1127 /* Packet Status check */ 1128 if (RxLen < 0x40) { 1129 GoodPacket = false; 1130 if (netif_msg_rx_err(db)) 1131 dev_dbg(db->dev, "RX: Bad Packet (runt)\n"); 1132 } 1133 1134 if (RxLen > DM9000_PKT_MAX) { 1135 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen); 1136 } 1137 1138 /* rxhdr.RxStatus is identical to RSR register. */ 1139 if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE | 1140 RSR_PLE | RSR_RWTO | 1141 RSR_LCS | RSR_RF)) { 1142 GoodPacket = false; 1143 if (rxhdr.RxStatus & RSR_FOE) { 1144 if (netif_msg_rx_err(db)) 1145 dev_dbg(db->dev, "fifo error\n"); 1146 dev->stats.rx_fifo_errors++; 1147 } 1148 if (rxhdr.RxStatus & RSR_CE) { 1149 if (netif_msg_rx_err(db)) 1150 dev_dbg(db->dev, "crc error\n"); 1151 dev->stats.rx_crc_errors++; 1152 } 1153 if (rxhdr.RxStatus & RSR_RF) { 1154 if (netif_msg_rx_err(db)) 1155 dev_dbg(db->dev, "length error\n"); 1156 dev->stats.rx_length_errors++; 1157 } 1158 } 1159 1160 /* Move data from DM9000 */ 1161 if (GoodPacket && 1162 ((skb = netdev_alloc_skb(dev, RxLen + 4)) != NULL)) { 1163 skb_reserve(skb, 2); 1164 rdptr = skb_put(skb, RxLen - 4); 1165 1166 /* Read received packet from RX SRAM */ 1167 1168 (db->inblk)(db->io_data, rdptr, RxLen); 1169 dev->stats.rx_bytes += RxLen; 1170 1171 /* Pass to upper layer */ 1172 skb->protocol = eth_type_trans(skb, dev); 1173 if (dev->features & NETIF_F_RXCSUM) { 1174 if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0) 1175 skb->ip_summed = CHECKSUM_UNNECESSARY; 1176 else 1177 skb_checksum_none_assert(skb); 1178 } 1179 netif_rx(skb); 1180 dev->stats.rx_packets++; 1181 1182 } else { 1183 /* need to dump the packet's data */ 1184 1185 (db->dumpblk)(db->io_data, RxLen); 1186 } 1187 } while (rxbyte & DM9000_PKT_RDY); 1188 } 1189 1190 static irqreturn_t dm9000_interrupt(int irq, void *dev_id) 1191 { 1192 struct net_device *dev = dev_id; 1193 struct board_info *db = netdev_priv(dev); 1194 int int_status; 1195 unsigned long flags; 1196 u8 reg_save; 1197 1198 dm9000_dbg(db, 3, "entering %s\n", __func__); 1199 1200 /* A real interrupt coming */ 1201 1202 /* holders of db->lock must always block IRQs */ 1203 spin_lock_irqsave(&db->lock, flags); 1204 1205 /* Save previous register address */ 1206 reg_save = readb(db->io_addr); 1207 1208 dm9000_mask_interrupts(db); 1209 /* Got DM9000 interrupt status */ 1210 int_status = ior(db, DM9000_ISR); /* Got ISR */ 1211 iow(db, DM9000_ISR, int_status); /* Clear ISR status */ 1212 1213 if (netif_msg_intr(db)) 1214 dev_dbg(db->dev, "interrupt status %02x\n", int_status); 1215 1216 /* Received the coming packet */ 1217 if (int_status & ISR_PRS) 1218 dm9000_rx(dev); 1219 1220 /* Transmit Interrupt check */ 1221 if (int_status & ISR_PTS) 1222 dm9000_tx_done(dev, db); 1223 1224 if (db->type != TYPE_DM9000E) { 1225 if (int_status & ISR_LNKCHNG) { 1226 /* fire a link-change request */ 1227 schedule_delayed_work(&db->phy_poll, 1); 1228 } 1229 } 1230 1231 dm9000_unmask_interrupts(db); 1232 /* Restore previous register address */ 1233 writeb(reg_save, db->io_addr); 1234 1235 spin_unlock_irqrestore(&db->lock, flags); 1236 1237 return IRQ_HANDLED; 1238 } 1239 1240 static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id) 1241 { 1242 struct net_device *dev = dev_id; 1243 struct board_info *db = netdev_priv(dev); 1244 unsigned long flags; 1245 unsigned nsr, wcr; 1246 1247 spin_lock_irqsave(&db->lock, flags); 1248 1249 nsr = ior(db, DM9000_NSR); 1250 wcr = ior(db, DM9000_WCR); 1251 1252 dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr); 1253 1254 if (nsr & NSR_WAKEST) { 1255 /* clear, so we can avoid */ 1256 iow(db, DM9000_NSR, NSR_WAKEST); 1257 1258 if (wcr & WCR_LINKST) 1259 dev_info(db->dev, "wake by link status change\n"); 1260 if (wcr & WCR_SAMPLEST) 1261 dev_info(db->dev, "wake by sample packet\n"); 1262 if (wcr & WCR_MAGICST) 1263 dev_info(db->dev, "wake by magic packet\n"); 1264 if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST))) 1265 dev_err(db->dev, "wake signalled with no reason? " 1266 "NSR=0x%02x, WSR=0x%02x\n", nsr, wcr); 1267 } 1268 1269 spin_unlock_irqrestore(&db->lock, flags); 1270 1271 return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE; 1272 } 1273 1274 #ifdef CONFIG_NET_POLL_CONTROLLER 1275 /* 1276 *Used by netconsole 1277 */ 1278 static void dm9000_poll_controller(struct net_device *dev) 1279 { 1280 disable_irq(dev->irq); 1281 dm9000_interrupt(dev->irq, dev); 1282 enable_irq(dev->irq); 1283 } 1284 #endif 1285 1286 /* 1287 * Open the interface. 1288 * The interface is opened whenever "ifconfig" actives it. 1289 */ 1290 static int 1291 dm9000_open(struct net_device *dev) 1292 { 1293 struct board_info *db = netdev_priv(dev); 1294 unsigned int irq_flags = irq_get_trigger_type(dev->irq); 1295 1296 if (netif_msg_ifup(db)) 1297 dev_dbg(db->dev, "enabling %s\n", dev->name); 1298 1299 /* If there is no IRQ type specified, tell the user that this is a 1300 * problem 1301 */ 1302 if (irq_flags == IRQF_TRIGGER_NONE) 1303 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n"); 1304 1305 irq_flags |= IRQF_SHARED; 1306 1307 /* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */ 1308 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */ 1309 mdelay(1); /* delay needs by DM9000B */ 1310 1311 /* Initialize DM9000 board */ 1312 dm9000_init_dm9000(dev); 1313 1314 if (request_irq(dev->irq, dm9000_interrupt, irq_flags, dev->name, dev)) 1315 return -EAGAIN; 1316 /* Now that we have an interrupt handler hooked up we can unmask 1317 * our interrupts 1318 */ 1319 dm9000_unmask_interrupts(db); 1320 1321 /* Init driver variable */ 1322 db->dbug_cnt = 0; 1323 1324 mii_check_media(&db->mii, netif_msg_link(db), 1); 1325 netif_start_queue(dev); 1326 1327 /* Poll initial link status */ 1328 schedule_delayed_work(&db->phy_poll, 1); 1329 1330 return 0; 1331 } 1332 1333 static void 1334 dm9000_shutdown(struct net_device *dev) 1335 { 1336 struct board_info *db = netdev_priv(dev); 1337 1338 /* RESET device */ 1339 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */ 1340 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */ 1341 dm9000_mask_interrupts(db); 1342 iow(db, DM9000_RCR, 0x00); /* Disable RX */ 1343 } 1344 1345 /* 1346 * Stop the interface. 1347 * The interface is stopped when it is brought. 1348 */ 1349 static int 1350 dm9000_stop(struct net_device *ndev) 1351 { 1352 struct board_info *db = netdev_priv(ndev); 1353 1354 if (netif_msg_ifdown(db)) 1355 dev_dbg(db->dev, "shutting down %s\n", ndev->name); 1356 1357 cancel_delayed_work_sync(&db->phy_poll); 1358 1359 netif_stop_queue(ndev); 1360 netif_carrier_off(ndev); 1361 1362 /* free interrupt */ 1363 free_irq(ndev->irq, ndev); 1364 1365 dm9000_shutdown(ndev); 1366 1367 return 0; 1368 } 1369 1370 static const struct net_device_ops dm9000_netdev_ops = { 1371 .ndo_open = dm9000_open, 1372 .ndo_stop = dm9000_stop, 1373 .ndo_start_xmit = dm9000_start_xmit, 1374 .ndo_tx_timeout = dm9000_timeout, 1375 .ndo_set_rx_mode = dm9000_hash_table, 1376 .ndo_do_ioctl = dm9000_ioctl, 1377 .ndo_set_features = dm9000_set_features, 1378 .ndo_validate_addr = eth_validate_addr, 1379 .ndo_set_mac_address = eth_mac_addr, 1380 #ifdef CONFIG_NET_POLL_CONTROLLER 1381 .ndo_poll_controller = dm9000_poll_controller, 1382 #endif 1383 }; 1384 1385 static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev) 1386 { 1387 struct dm9000_plat_data *pdata; 1388 struct device_node *np = dev->of_node; 1389 const void *mac_addr; 1390 1391 if (!IS_ENABLED(CONFIG_OF) || !np) 1392 return ERR_PTR(-ENXIO); 1393 1394 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 1395 if (!pdata) 1396 return ERR_PTR(-ENOMEM); 1397 1398 if (of_find_property(np, "davicom,ext-phy", NULL)) 1399 pdata->flags |= DM9000_PLATF_EXT_PHY; 1400 if (of_find_property(np, "davicom,no-eeprom", NULL)) 1401 pdata->flags |= DM9000_PLATF_NO_EEPROM; 1402 1403 mac_addr = of_get_mac_address(np); 1404 if (!IS_ERR(mac_addr)) 1405 ether_addr_copy(pdata->dev_addr, mac_addr); 1406 else if (PTR_ERR(mac_addr) == -EPROBE_DEFER) 1407 return ERR_CAST(mac_addr); 1408 1409 return pdata; 1410 } 1411 1412 /* 1413 * Search DM9000 board, allocate space and register it 1414 */ 1415 static int 1416 dm9000_probe(struct platform_device *pdev) 1417 { 1418 struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev); 1419 struct board_info *db; /* Point a board information structure */ 1420 struct net_device *ndev; 1421 struct device *dev = &pdev->dev; 1422 const unsigned char *mac_src; 1423 int ret = 0; 1424 int iosize; 1425 int i; 1426 u32 id_val; 1427 int reset_gpios; 1428 enum of_gpio_flags flags; 1429 struct regulator *power; 1430 bool inv_mac_addr = false; 1431 1432 power = devm_regulator_get(dev, "vcc"); 1433 if (IS_ERR(power)) { 1434 if (PTR_ERR(power) == -EPROBE_DEFER) 1435 return -EPROBE_DEFER; 1436 dev_dbg(dev, "no regulator provided\n"); 1437 } else { 1438 ret = regulator_enable(power); 1439 if (ret != 0) { 1440 dev_err(dev, 1441 "Failed to enable power regulator: %d\n", ret); 1442 return ret; 1443 } 1444 dev_dbg(dev, "regulator enabled\n"); 1445 } 1446 1447 reset_gpios = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, 1448 &flags); 1449 if (gpio_is_valid(reset_gpios)) { 1450 ret = devm_gpio_request_one(dev, reset_gpios, flags, 1451 "dm9000_reset"); 1452 if (ret) { 1453 dev_err(dev, "failed to request reset gpio %d: %d\n", 1454 reset_gpios, ret); 1455 return -ENODEV; 1456 } 1457 1458 /* According to manual PWRST# Low Period Min 1ms */ 1459 msleep(2); 1460 gpio_set_value(reset_gpios, 1); 1461 /* Needs 3ms to read eeprom when PWRST is deasserted */ 1462 msleep(4); 1463 } 1464 1465 if (!pdata) { 1466 pdata = dm9000_parse_dt(&pdev->dev); 1467 if (IS_ERR(pdata)) 1468 return PTR_ERR(pdata); 1469 } 1470 1471 /* Init network device */ 1472 ndev = alloc_etherdev(sizeof(struct board_info)); 1473 if (!ndev) 1474 return -ENOMEM; 1475 1476 SET_NETDEV_DEV(ndev, &pdev->dev); 1477 1478 dev_dbg(&pdev->dev, "dm9000_probe()\n"); 1479 1480 /* setup board info structure */ 1481 db = netdev_priv(ndev); 1482 1483 db->dev = &pdev->dev; 1484 db->ndev = ndev; 1485 1486 spin_lock_init(&db->lock); 1487 mutex_init(&db->addr_lock); 1488 1489 INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work); 1490 1491 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1492 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1493 1494 if (!db->addr_res || !db->data_res) { 1495 dev_err(db->dev, "insufficient resources addr=%p data=%p\n", 1496 db->addr_res, db->data_res); 1497 ret = -ENOENT; 1498 goto out; 1499 } 1500 1501 ndev->irq = platform_get_irq(pdev, 0); 1502 if (ndev->irq < 0) { 1503 ret = ndev->irq; 1504 goto out; 1505 } 1506 1507 db->irq_wake = platform_get_irq(pdev, 1); 1508 if (db->irq_wake >= 0) { 1509 dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake); 1510 1511 ret = request_irq(db->irq_wake, dm9000_wol_interrupt, 1512 IRQF_SHARED, dev_name(db->dev), ndev); 1513 if (ret) { 1514 dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret); 1515 } else { 1516 1517 /* test to see if irq is really wakeup capable */ 1518 ret = irq_set_irq_wake(db->irq_wake, 1); 1519 if (ret) { 1520 dev_err(db->dev, "irq %d cannot set wakeup (%d)\n", 1521 db->irq_wake, ret); 1522 ret = 0; 1523 } else { 1524 irq_set_irq_wake(db->irq_wake, 0); 1525 db->wake_supported = 1; 1526 } 1527 } 1528 } 1529 1530 iosize = resource_size(db->addr_res); 1531 db->addr_req = request_mem_region(db->addr_res->start, iosize, 1532 pdev->name); 1533 1534 if (db->addr_req == NULL) { 1535 dev_err(db->dev, "cannot claim address reg area\n"); 1536 ret = -EIO; 1537 goto out; 1538 } 1539 1540 db->io_addr = ioremap(db->addr_res->start, iosize); 1541 1542 if (db->io_addr == NULL) { 1543 dev_err(db->dev, "failed to ioremap address reg\n"); 1544 ret = -EINVAL; 1545 goto out; 1546 } 1547 1548 iosize = resource_size(db->data_res); 1549 db->data_req = request_mem_region(db->data_res->start, iosize, 1550 pdev->name); 1551 1552 if (db->data_req == NULL) { 1553 dev_err(db->dev, "cannot claim data reg area\n"); 1554 ret = -EIO; 1555 goto out; 1556 } 1557 1558 db->io_data = ioremap(db->data_res->start, iosize); 1559 1560 if (db->io_data == NULL) { 1561 dev_err(db->dev, "failed to ioremap data reg\n"); 1562 ret = -EINVAL; 1563 goto out; 1564 } 1565 1566 /* fill in parameters for net-dev structure */ 1567 ndev->base_addr = (unsigned long)db->io_addr; 1568 1569 /* ensure at least we have a default set of IO routines */ 1570 dm9000_set_io(db, iosize); 1571 1572 /* check to see if anything is being over-ridden */ 1573 if (pdata != NULL) { 1574 /* check to see if the driver wants to over-ride the 1575 * default IO width */ 1576 1577 if (pdata->flags & DM9000_PLATF_8BITONLY) 1578 dm9000_set_io(db, 1); 1579 1580 if (pdata->flags & DM9000_PLATF_16BITONLY) 1581 dm9000_set_io(db, 2); 1582 1583 if (pdata->flags & DM9000_PLATF_32BITONLY) 1584 dm9000_set_io(db, 4); 1585 1586 /* check to see if there are any IO routine 1587 * over-rides */ 1588 1589 if (pdata->inblk != NULL) 1590 db->inblk = pdata->inblk; 1591 1592 if (pdata->outblk != NULL) 1593 db->outblk = pdata->outblk; 1594 1595 if (pdata->dumpblk != NULL) 1596 db->dumpblk = pdata->dumpblk; 1597 1598 db->flags = pdata->flags; 1599 } 1600 1601 #ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL 1602 db->flags |= DM9000_PLATF_SIMPLE_PHY; 1603 #endif 1604 1605 dm9000_reset(db); 1606 1607 /* try multiple times, DM9000 sometimes gets the read wrong */ 1608 for (i = 0; i < 8; i++) { 1609 id_val = ior(db, DM9000_VIDL); 1610 id_val |= (u32)ior(db, DM9000_VIDH) << 8; 1611 id_val |= (u32)ior(db, DM9000_PIDL) << 16; 1612 id_val |= (u32)ior(db, DM9000_PIDH) << 24; 1613 1614 if (id_val == DM9000_ID) 1615 break; 1616 dev_err(db->dev, "read wrong id 0x%08x\n", id_val); 1617 } 1618 1619 if (id_val != DM9000_ID) { 1620 dev_err(db->dev, "wrong id: 0x%08x\n", id_val); 1621 ret = -ENODEV; 1622 goto out; 1623 } 1624 1625 /* Identify what type of DM9000 we are working on */ 1626 1627 id_val = ior(db, DM9000_CHIPR); 1628 dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val); 1629 1630 switch (id_val) { 1631 case CHIPR_DM9000A: 1632 db->type = TYPE_DM9000A; 1633 break; 1634 case CHIPR_DM9000B: 1635 db->type = TYPE_DM9000B; 1636 break; 1637 default: 1638 dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val); 1639 db->type = TYPE_DM9000E; 1640 } 1641 1642 /* dm9000a/b are capable of hardware checksum offload */ 1643 if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) { 1644 ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 1645 ndev->features |= ndev->hw_features; 1646 } 1647 1648 /* from this point we assume that we have found a DM9000 */ 1649 1650 ndev->netdev_ops = &dm9000_netdev_ops; 1651 ndev->watchdog_timeo = msecs_to_jiffies(watchdog); 1652 ndev->ethtool_ops = &dm9000_ethtool_ops; 1653 1654 db->msg_enable = NETIF_MSG_LINK; 1655 db->mii.phy_id_mask = 0x1f; 1656 db->mii.reg_num_mask = 0x1f; 1657 db->mii.force_media = 0; 1658 db->mii.full_duplex = 0; 1659 db->mii.dev = ndev; 1660 db->mii.mdio_read = dm9000_phy_read; 1661 db->mii.mdio_write = dm9000_phy_write; 1662 1663 mac_src = "eeprom"; 1664 1665 /* try reading the node address from the attached EEPROM */ 1666 for (i = 0; i < 6; i += 2) 1667 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i); 1668 1669 if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) { 1670 mac_src = "platform data"; 1671 memcpy(ndev->dev_addr, pdata->dev_addr, ETH_ALEN); 1672 } 1673 1674 if (!is_valid_ether_addr(ndev->dev_addr)) { 1675 /* try reading from mac */ 1676 1677 mac_src = "chip"; 1678 for (i = 0; i < 6; i++) 1679 ndev->dev_addr[i] = ior(db, i+DM9000_PAR); 1680 } 1681 1682 if (!is_valid_ether_addr(ndev->dev_addr)) { 1683 inv_mac_addr = true; 1684 eth_hw_addr_random(ndev); 1685 mac_src = "random"; 1686 } 1687 1688 1689 platform_set_drvdata(pdev, ndev); 1690 ret = register_netdev(ndev); 1691 1692 if (ret == 0) { 1693 if (inv_mac_addr) 1694 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please set using ip\n", 1695 ndev->name); 1696 printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n", 1697 ndev->name, dm9000_type_to_char(db->type), 1698 db->io_addr, db->io_data, ndev->irq, 1699 ndev->dev_addr, mac_src); 1700 } 1701 return 0; 1702 1703 out: 1704 dev_err(db->dev, "not found (%d).\n", ret); 1705 1706 dm9000_release_board(pdev, db); 1707 free_netdev(ndev); 1708 1709 return ret; 1710 } 1711 1712 static int 1713 dm9000_drv_suspend(struct device *dev) 1714 { 1715 struct net_device *ndev = dev_get_drvdata(dev); 1716 struct board_info *db; 1717 1718 if (ndev) { 1719 db = netdev_priv(ndev); 1720 db->in_suspend = 1; 1721 1722 if (!netif_running(ndev)) 1723 return 0; 1724 1725 netif_device_detach(ndev); 1726 1727 /* only shutdown if not using WoL */ 1728 if (!db->wake_state) 1729 dm9000_shutdown(ndev); 1730 } 1731 return 0; 1732 } 1733 1734 static int 1735 dm9000_drv_resume(struct device *dev) 1736 { 1737 struct net_device *ndev = dev_get_drvdata(dev); 1738 struct board_info *db = netdev_priv(ndev); 1739 1740 if (ndev) { 1741 if (netif_running(ndev)) { 1742 /* reset if we were not in wake mode to ensure if 1743 * the device was powered off it is in a known state */ 1744 if (!db->wake_state) { 1745 dm9000_init_dm9000(ndev); 1746 dm9000_unmask_interrupts(db); 1747 } 1748 1749 netif_device_attach(ndev); 1750 } 1751 1752 db->in_suspend = 0; 1753 } 1754 return 0; 1755 } 1756 1757 static const struct dev_pm_ops dm9000_drv_pm_ops = { 1758 .suspend = dm9000_drv_suspend, 1759 .resume = dm9000_drv_resume, 1760 }; 1761 1762 static int 1763 dm9000_drv_remove(struct platform_device *pdev) 1764 { 1765 struct net_device *ndev = platform_get_drvdata(pdev); 1766 1767 unregister_netdev(ndev); 1768 dm9000_release_board(pdev, netdev_priv(ndev)); 1769 free_netdev(ndev); /* free device structure */ 1770 1771 dev_dbg(&pdev->dev, "released and freed device\n"); 1772 return 0; 1773 } 1774 1775 #ifdef CONFIG_OF 1776 static const struct of_device_id dm9000_of_matches[] = { 1777 { .compatible = "davicom,dm9000", }, 1778 { /* sentinel */ } 1779 }; 1780 MODULE_DEVICE_TABLE(of, dm9000_of_matches); 1781 #endif 1782 1783 static struct platform_driver dm9000_driver = { 1784 .driver = { 1785 .name = "dm9000", 1786 .pm = &dm9000_drv_pm_ops, 1787 .of_match_table = of_match_ptr(dm9000_of_matches), 1788 }, 1789 .probe = dm9000_probe, 1790 .remove = dm9000_drv_remove, 1791 }; 1792 1793 module_platform_driver(dm9000_driver); 1794 1795 MODULE_AUTHOR("Sascha Hauer, Ben Dooks"); 1796 MODULE_DESCRIPTION("Davicom DM9000 network driver"); 1797 MODULE_LICENSE("GPL"); 1798 MODULE_ALIAS("platform:dm9000"); 1799