drivers/net/ethernet/davicom/dm9000.c

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This source file includes following definitions.
to_dm9000_board
ior
iow
dm9000_reset
dm9000_outblk_8bit
dm9000_outblk_16bit
dm9000_outblk_32bit
dm9000_inblk_8bit
dm9000_inblk_16bit
dm9000_inblk_32bit
dm9000_dumpblk_8bit
dm9000_dumpblk_16bit
dm9000_dumpblk_32bit
dm9000_msleep
dm9000_phy_read
dm9000_phy_write
dm9000_set_io
dm9000_schedule_poll
dm9000_ioctl
dm9000_read_locked
dm9000_wait_eeprom
dm9000_read_eeprom
dm9000_write_eeprom
dm9000_get_drvinfo
dm9000_get_msglevel
dm9000_set_msglevel
dm9000_get_link_ksettings
dm9000_set_link_ksettings
dm9000_nway_reset
dm9000_set_features
dm9000_get_link
dm9000_get_eeprom_len
dm9000_get_eeprom
dm9000_set_eeprom
dm9000_get_wol
dm9000_set_wol
dm9000_show_carrier
dm9000_poll_work
dm9000_release_board
dm9000_type_to_char
dm9000_hash_table_unlocked
dm9000_hash_table
dm9000_mask_interrupts
dm9000_unmask_interrupts
dm9000_init_dm9000
dm9000_timeout
dm9000_send_packet
dm9000_start_xmit
dm9000_tx_done
dm9000_rx
dm9000_interrupt
dm9000_wol_interrupt
dm9000_poll_controller
dm9000_open
dm9000_shutdown
dm9000_stop
dm9000_parse_dt
dm9000_probe
dm9000_drv_suspend
dm9000_drv_resume
dm9000_drv_remove
   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 #define DRV_VERSION     "1.31"
  46 
  47 /*
  48  * Transmit timeout, default 5 seconds.
  49  */
  50 static int watchdog = 5000;
  51 module_param(watchdog, int, 0400);
  52 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
  53 
  54 /*
  55  * Debug messages level
  56  */
  57 static int debug;
  58 module_param(debug, int, 0644);
  59 MODULE_PARM_DESC(debug, "dm9000 debug level (0-6)");
  60 
  61 /* DM9000 register address locking.
  62  *
  63  * The DM9000 uses an address register to control where data written
  64  * to the data register goes. This means that the address register
  65  * must be preserved over interrupts or similar calls.
  66  *
  67  * During interrupt and other critical calls, a spinlock is used to
  68  * protect the system, but the calls themselves save the address
  69  * in the address register in case they are interrupting another
  70  * access to the device.
  71  *
  72  * For general accesses a lock is provided so that calls which are
  73  * allowed to sleep are serialised so that the address register does
  74  * not need to be saved. This lock also serves to serialise access
  75  * to the EEPROM and PHY access registers which are shared between
  76  * these two devices.
  77  */
  78 
  79 /* The driver supports the original DM9000E, and now the two newer
  80  * devices, DM9000A and DM9000B.
  81  */
  82 
  83 enum dm9000_type {
  84         TYPE_DM9000E,   /* original DM9000 */
  85         TYPE_DM9000A,
  86         TYPE_DM9000B
  87 };
  88 
  89 /* Structure/enum declaration ------------------------------- */
  90 struct board_info {
  91 
  92         void __iomem    *io_addr;       /* Register I/O base address */
  93         void __iomem    *io_data;       /* Data I/O address */
  94         u16              irq;           /* IRQ */
  95 
  96         u16             tx_pkt_cnt;
  97         u16             queue_pkt_len;
  98         u16             queue_start_addr;
  99         u16             queue_ip_summed;
 100         u16             dbug_cnt;
 101         u8              io_mode;                /* 0:word, 2:byte */
 102         u8              phy_addr;
 103         u8              imr_all;
 104 
 105         unsigned int    flags;
 106         unsigned int    in_timeout:1;
 107         unsigned int    in_suspend:1;
 108         unsigned int    wake_supported:1;
 109 
 110         enum dm9000_type type;
 111 
 112         void (*inblk)(void __iomem *port, void *data, int length);
 113         void (*outblk)(void __iomem *port, void *data, int length);
 114         void (*dumpblk)(void __iomem *port, int length);
 115 
 116         struct device   *dev;        /* parent device */
 117 
 118         struct resource *addr_res;   /* resources found */
 119         struct resource *data_res;
 120         struct resource *addr_req;   /* resources requested */
 121         struct resource *data_req;
 122 
 123         int              irq_wake;
 124 
 125         struct mutex     addr_lock;     /* phy and eeprom access lock */
 126 
 127         struct delayed_work phy_poll;
 128         struct net_device  *ndev;
 129 
 130         spinlock_t      lock;
 131 
 132         struct mii_if_info mii;
 133         u32             msg_enable;
 134         u32             wake_state;
 135 
 136         int             ip_summed;
 137 };
 138 
 139 /* debug code */
 140 
 141 #define dm9000_dbg(db, lev, msg...) do {                \
 142         if ((lev) < debug) {                            \
 143                 dev_dbg(db->dev, msg);                  \
 144         }                                               \
 145 } while (0)
 146 
 147 static inline struct board_info *to_dm9000_board(struct net_device *dev)
 148 {
 149         return netdev_priv(dev);
 150 }
 151 
 152 /* DM9000 network board routine ---------------------------- */
 153 
 154 /*
 155  *   Read a byte from I/O port
 156  */
 157 static u8
 158 ior(struct board_info *db, int reg)
 159 {
 160         writeb(reg, db->io_addr);
 161         return readb(db->io_data);
 162 }
 163 
 164 /*
 165  *   Write a byte to I/O port
 166  */
 167 
 168 static void
 169 iow(struct board_info *db, int reg, int value)
 170 {
 171         writeb(reg, db->io_addr);
 172         writeb(value, db->io_data);
 173 }
 174 
 175 static void
 176 dm9000_reset(struct board_info *db)
 177 {
 178         dev_dbg(db->dev, "resetting device\n");
 179 
 180         /* Reset DM9000, see DM9000 Application Notes V1.22 Jun 11, 2004 page 29
 181          * The essential point is that we have to do a double reset, and the
 182          * instruction is to set LBK into MAC internal loopback mode.
 183          */
 184         iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
 185         udelay(100); /* Application note says at least 20 us */
 186         if (ior(db, DM9000_NCR) & 1)
 187                 dev_err(db->dev, "dm9000 did not respond to first reset\n");
 188 
 189         iow(db, DM9000_NCR, 0);
 190         iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
 191         udelay(100);
 192         if (ior(db, DM9000_NCR) & 1)
 193                 dev_err(db->dev, "dm9000 did not respond to second reset\n");
 194 }
 195 
 196 /* routines for sending block to chip */
 197 
 198 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
 199 {
 200         iowrite8_rep(reg, data, count);
 201 }
 202 
 203 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
 204 {
 205         iowrite16_rep(reg, data, (count+1) >> 1);
 206 }
 207 
 208 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
 209 {
 210         iowrite32_rep(reg, data, (count+3) >> 2);
 211 }
 212 
 213 /* input block from chip to memory */
 214 
 215 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
 216 {
 217         ioread8_rep(reg, data, count);
 218 }
 219 
 220 
 221 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
 222 {
 223         ioread16_rep(reg, data, (count+1) >> 1);
 224 }
 225 
 226 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
 227 {
 228         ioread32_rep(reg, data, (count+3) >> 2);
 229 }
 230 
 231 /* dump block from chip to null */
 232 
 233 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
 234 {
 235         int i;
 236         int tmp;
 237 
 238         for (i = 0; i < count; i++)
 239                 tmp = readb(reg);
 240 }
 241 
 242 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
 243 {
 244         int i;
 245         int tmp;
 246 
 247         count = (count + 1) >> 1;
 248 
 249         for (i = 0; i < count; i++)
 250                 tmp = readw(reg);
 251 }
 252 
 253 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
 254 {
 255         int i;
 256         int tmp;
 257 
 258         count = (count + 3) >> 2;
 259 
 260         for (i = 0; i < count; i++)
 261                 tmp = readl(reg);
 262 }
 263 
 264 /*
 265  * Sleep, either by using msleep() or if we are suspending, then
 266  * use mdelay() to sleep.
 267  */
 268 static void dm9000_msleep(struct board_info *db, unsigned int ms)
 269 {
 270         if (db->in_suspend || db->in_timeout)
 271                 mdelay(ms);
 272         else
 273                 msleep(ms);
 274 }
 275 
 276 /* Read a word from phyxcer */
 277 static int
 278 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
 279 {
 280         struct board_info *db = netdev_priv(dev);
 281         unsigned long flags;
 282         unsigned int reg_save;
 283         int ret;
 284 
 285         mutex_lock(&db->addr_lock);
 286 
 287         spin_lock_irqsave(&db->lock, flags);
 288 
 289         /* Save previous register address */
 290         reg_save = readb(db->io_addr);
 291 
 292         /* Fill the phyxcer register into REG_0C */
 293         iow(db, DM9000_EPAR, DM9000_PHY | reg);
 294 
 295         /* Issue phyxcer read command */
 296         iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS);
 297 
 298         writeb(reg_save, db->io_addr);
 299         spin_unlock_irqrestore(&db->lock, flags);
 300 
 301         dm9000_msleep(db, 1);           /* Wait read complete */
 302 
 303         spin_lock_irqsave(&db->lock, flags);
 304         reg_save = readb(db->io_addr);
 305 
 306         iow(db, DM9000_EPCR, 0x0);      /* Clear phyxcer read command */
 307 
 308         /* The read data keeps on REG_0D & REG_0E */
 309         ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
 310 
 311         /* restore the previous address */
 312         writeb(reg_save, db->io_addr);
 313         spin_unlock_irqrestore(&db->lock, flags);
 314 
 315         mutex_unlock(&db->addr_lock);
 316 
 317         dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
 318         return ret;
 319 }
 320 
 321 /* Write a word to phyxcer */
 322 static void
 323 dm9000_phy_write(struct net_device *dev,
 324                  int phyaddr_unused, int reg, int value)
 325 {
 326         struct board_info *db = netdev_priv(dev);
 327         unsigned long flags;
 328         unsigned long reg_save;
 329 
 330         dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value);
 331         if (!db->in_timeout)
 332                 mutex_lock(&db->addr_lock);
 333 
 334         spin_lock_irqsave(&db->lock, flags);
 335 
 336         /* Save previous register address */
 337         reg_save = readb(db->io_addr);
 338 
 339         /* Fill the phyxcer register into REG_0C */
 340         iow(db, DM9000_EPAR, DM9000_PHY | reg);
 341 
 342         /* Fill the written data into REG_0D & REG_0E */
 343         iow(db, DM9000_EPDRL, value);
 344         iow(db, DM9000_EPDRH, value >> 8);
 345 
 346         /* Issue phyxcer write command */
 347         iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW);
 348 
 349         writeb(reg_save, db->io_addr);
 350         spin_unlock_irqrestore(&db->lock, flags);
 351 
 352         dm9000_msleep(db, 1);           /* Wait write complete */
 353 
 354         spin_lock_irqsave(&db->lock, flags);
 355         reg_save = readb(db->io_addr);
 356 
 357         iow(db, DM9000_EPCR, 0x0);      /* Clear phyxcer write command */
 358 
 359         /* restore the previous address */
 360         writeb(reg_save, db->io_addr);
 361 
 362         spin_unlock_irqrestore(&db->lock, flags);
 363         if (!db->in_timeout)
 364                 mutex_unlock(&db->addr_lock);
 365 }
 366 
 367 /* dm9000_set_io
 368  *
 369  * select the specified set of io routines to use with the
 370  * device
 371  */
 372 
 373 static void dm9000_set_io(struct board_info *db, int byte_width)
 374 {
 375         /* use the size of the data resource to work out what IO
 376          * routines we want to use
 377          */
 378 
 379         switch (byte_width) {
 380         case 1:
 381                 db->dumpblk = dm9000_dumpblk_8bit;
 382                 db->outblk  = dm9000_outblk_8bit;
 383                 db->inblk   = dm9000_inblk_8bit;
 384                 break;
 385 
 386 
 387         case 3:
 388                 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
 389                 /* fall through */
 390         case 2:
 391                 db->dumpblk = dm9000_dumpblk_16bit;
 392                 db->outblk  = dm9000_outblk_16bit;
 393                 db->inblk   = dm9000_inblk_16bit;
 394                 break;
 395 
 396         case 4:
 397         default:
 398                 db->dumpblk = dm9000_dumpblk_32bit;
 399                 db->outblk  = dm9000_outblk_32bit;
 400                 db->inblk   = dm9000_inblk_32bit;
 401                 break;
 402         }
 403 }
 404 
 405 static void dm9000_schedule_poll(struct board_info *db)
 406 {
 407         if (db->type == TYPE_DM9000E)
 408                 schedule_delayed_work(&db->phy_poll, HZ * 2);
 409 }
 410 
 411 static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 412 {
 413         struct board_info *dm = to_dm9000_board(dev);
 414 
 415         if (!netif_running(dev))
 416                 return -EINVAL;
 417 
 418         return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
 419 }
 420 
 421 static unsigned int
 422 dm9000_read_locked(struct board_info *db, int reg)
 423 {
 424         unsigned long flags;
 425         unsigned int ret;
 426 
 427         spin_lock_irqsave(&db->lock, flags);
 428         ret = ior(db, reg);
 429         spin_unlock_irqrestore(&db->lock, flags);
 430 
 431         return ret;
 432 }
 433 
 434 static int dm9000_wait_eeprom(struct board_info *db)
 435 {
 436         unsigned int status;
 437         int timeout = 8;        /* wait max 8msec */
 438 
 439         /* The DM9000 data sheets say we should be able to
 440          * poll the ERRE bit in EPCR to wait for the EEPROM
 441          * operation. From testing several chips, this bit
 442          * does not seem to work.
 443          *
 444          * We attempt to use the bit, but fall back to the
 445          * timeout (which is why we do not return an error
 446          * on expiry) to say that the EEPROM operation has
 447          * completed.
 448          */
 449 
 450         while (1) {
 451                 status = dm9000_read_locked(db, DM9000_EPCR);
 452 
 453                 if ((status & EPCR_ERRE) == 0)
 454                         break;
 455 
 456                 msleep(1);
 457 
 458                 if (timeout-- < 0) {
 459                         dev_dbg(db->dev, "timeout waiting EEPROM\n");
 460                         break;
 461                 }
 462         }
 463 
 464         return 0;
 465 }
 466 
 467 /*
 468  *  Read a word data from EEPROM
 469  */
 470 static void
 471 dm9000_read_eeprom(struct board_info *db, int offset, u8 *to)
 472 {
 473         unsigned long flags;
 474 
 475         if (db->flags & DM9000_PLATF_NO_EEPROM) {
 476                 to[0] = 0xff;
 477                 to[1] = 0xff;
 478                 return;
 479         }
 480 
 481         mutex_lock(&db->addr_lock);
 482 
 483         spin_lock_irqsave(&db->lock, flags);
 484 
 485         iow(db, DM9000_EPAR, offset);
 486         iow(db, DM9000_EPCR, EPCR_ERPRR);
 487 
 488         spin_unlock_irqrestore(&db->lock, flags);
 489 
 490         dm9000_wait_eeprom(db);
 491 
 492         /* delay for at-least 150uS */
 493         msleep(1);
 494 
 495         spin_lock_irqsave(&db->lock, flags);
 496 
 497         iow(db, DM9000_EPCR, 0x0);
 498 
 499         to[0] = ior(db, DM9000_EPDRL);
 500         to[1] = ior(db, DM9000_EPDRH);
 501 
 502         spin_unlock_irqrestore(&db->lock, flags);
 503 
 504         mutex_unlock(&db->addr_lock);
 505 }
 506 
 507 /*
 508  * Write a word data to SROM
 509  */
 510 static void
 511 dm9000_write_eeprom(struct board_info *db, int offset, u8 *data)
 512 {
 513         unsigned long flags;
 514 
 515         if (db->flags & DM9000_PLATF_NO_EEPROM)
 516                 return;
 517 
 518         mutex_lock(&db->addr_lock);
 519 
 520         spin_lock_irqsave(&db->lock, flags);
 521         iow(db, DM9000_EPAR, offset);
 522         iow(db, DM9000_EPDRH, data[1]);
 523         iow(db, DM9000_EPDRL, data[0]);
 524         iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
 525         spin_unlock_irqrestore(&db->lock, flags);
 526 
 527         dm9000_wait_eeprom(db);
 528 
 529         mdelay(1);      /* wait at least 150uS to clear */
 530 
 531         spin_lock_irqsave(&db->lock, flags);
 532         iow(db, DM9000_EPCR, 0);
 533         spin_unlock_irqrestore(&db->lock, flags);
 534 
 535         mutex_unlock(&db->addr_lock);
 536 }
 537 
 538 /* ethtool ops */
 539 
 540 static void dm9000_get_drvinfo(struct net_device *dev,
 541                                struct ethtool_drvinfo *info)
 542 {
 543         struct board_info *dm = to_dm9000_board(dev);
 544 
 545         strlcpy(info->driver, CARDNAME, sizeof(info->driver));
 546         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 547         strlcpy(info->bus_info, to_platform_device(dm->dev)->name,
 548                 sizeof(info->bus_info));
 549 }
 550 
 551 static u32 dm9000_get_msglevel(struct net_device *dev)
 552 {
 553         struct board_info *dm = to_dm9000_board(dev);
 554 
 555         return dm->msg_enable;
 556 }
 557 
 558 static void dm9000_set_msglevel(struct net_device *dev, u32 value)
 559 {
 560         struct board_info *dm = to_dm9000_board(dev);
 561 
 562         dm->msg_enable = value;
 563 }
 564 
 565 static int dm9000_get_link_ksettings(struct net_device *dev,
 566                                      struct ethtool_link_ksettings *cmd)
 567 {
 568         struct board_info *dm = to_dm9000_board(dev);
 569 
 570         mii_ethtool_get_link_ksettings(&dm->mii, cmd);
 571         return 0;
 572 }
 573 
 574 static int dm9000_set_link_ksettings(struct net_device *dev,
 575                                      const struct ethtool_link_ksettings *cmd)
 576 {
 577         struct board_info *dm = to_dm9000_board(dev);
 578 
 579         return mii_ethtool_set_link_ksettings(&dm->mii, cmd);
 580 }
 581 
 582 static int dm9000_nway_reset(struct net_device *dev)
 583 {
 584         struct board_info *dm = to_dm9000_board(dev);
 585         return mii_nway_restart(&dm->mii);
 586 }
 587 
 588 static int dm9000_set_features(struct net_device *dev,
 589         netdev_features_t features)
 590 {
 591         struct board_info *dm = to_dm9000_board(dev);
 592         netdev_features_t changed = dev->features ^ features;
 593         unsigned long flags;
 594 
 595         if (!(changed & NETIF_F_RXCSUM))
 596                 return 0;
 597 
 598         spin_lock_irqsave(&dm->lock, flags);
 599         iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
 600         spin_unlock_irqrestore(&dm->lock, flags);
 601 
 602         return 0;
 603 }
 604 
 605 static u32 dm9000_get_link(struct net_device *dev)
 606 {
 607         struct board_info *dm = to_dm9000_board(dev);
 608         u32 ret;
 609 
 610         if (dm->flags & DM9000_PLATF_EXT_PHY)
 611                 ret = mii_link_ok(&dm->mii);
 612         else
 613                 ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0;
 614 
 615         return ret;
 616 }
 617 
 618 #define DM_EEPROM_MAGIC         (0x444D394B)
 619 
 620 static int dm9000_get_eeprom_len(struct net_device *dev)
 621 {
 622         return 128;
 623 }
 624 
 625 static int dm9000_get_eeprom(struct net_device *dev,
 626                              struct ethtool_eeprom *ee, u8 *data)
 627 {
 628         struct board_info *dm = to_dm9000_board(dev);
 629         int offset = ee->offset;
 630         int len = ee->len;
 631         int i;
 632 
 633         /* EEPROM access is aligned to two bytes */
 634 
 635         if ((len & 1) != 0 || (offset & 1) != 0)
 636                 return -EINVAL;
 637 
 638         if (dm->flags & DM9000_PLATF_NO_EEPROM)
 639                 return -ENOENT;
 640 
 641         ee->magic = DM_EEPROM_MAGIC;
 642 
 643         for (i = 0; i < len; i += 2)
 644                 dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
 645 
 646         return 0;
 647 }
 648 
 649 static int dm9000_set_eeprom(struct net_device *dev,
 650                              struct ethtool_eeprom *ee, u8 *data)
 651 {
 652         struct board_info *dm = to_dm9000_board(dev);
 653         int offset = ee->offset;
 654         int len = ee->len;
 655         int done;
 656 
 657         /* EEPROM access is aligned to two bytes */
 658 
 659         if (dm->flags & DM9000_PLATF_NO_EEPROM)
 660                 return -ENOENT;
 661 
 662         if (ee->magic != DM_EEPROM_MAGIC)
 663                 return -EINVAL;
 664 
 665         while (len > 0) {
 666                 if (len & 1 || offset & 1) {
 667                         int which = offset & 1;
 668                         u8 tmp[2];
 669 
 670                         dm9000_read_eeprom(dm, offset / 2, tmp);
 671                         tmp[which] = *data;
 672                         dm9000_write_eeprom(dm, offset / 2, tmp);
 673 
 674                         done = 1;
 675                 } else {
 676                         dm9000_write_eeprom(dm, offset / 2, data);
 677                         done = 2;
 678                 }
 679 
 680                 data += done;
 681                 offset += done;
 682                 len -= done;
 683         }
 684 
 685         return 0;
 686 }
 687 
 688 static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 689 {
 690         struct board_info *dm = to_dm9000_board(dev);
 691 
 692         memset(w, 0, sizeof(struct ethtool_wolinfo));
 693 
 694         /* note, we could probably support wake-phy too */
 695         w->supported = dm->wake_supported ? WAKE_MAGIC : 0;
 696         w->wolopts = dm->wake_state;
 697 }
 698 
 699 static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 700 {
 701         struct board_info *dm = to_dm9000_board(dev);
 702         unsigned long flags;
 703         u32 opts = w->wolopts;
 704         u32 wcr = 0;
 705 
 706         if (!dm->wake_supported)
 707                 return -EOPNOTSUPP;
 708 
 709         if (opts & ~WAKE_MAGIC)
 710                 return -EINVAL;
 711 
 712         if (opts & WAKE_MAGIC)
 713                 wcr |= WCR_MAGICEN;
 714 
 715         mutex_lock(&dm->addr_lock);
 716 
 717         spin_lock_irqsave(&dm->lock, flags);
 718         iow(dm, DM9000_WCR, wcr);
 719         spin_unlock_irqrestore(&dm->lock, flags);
 720 
 721         mutex_unlock(&dm->addr_lock);
 722 
 723         if (dm->wake_state != opts) {
 724                 /* change in wol state, update IRQ state */
 725 
 726                 if (!dm->wake_state)
 727                         irq_set_irq_wake(dm->irq_wake, 1);
 728                 else if (dm->wake_state && !opts)
 729                         irq_set_irq_wake(dm->irq_wake, 0);
 730         }
 731 
 732         dm->wake_state = opts;
 733         return 0;
 734 }
 735 
 736 static const struct ethtool_ops dm9000_ethtool_ops = {
 737         .get_drvinfo            = dm9000_get_drvinfo,
 738         .get_msglevel           = dm9000_get_msglevel,
 739         .set_msglevel           = dm9000_set_msglevel,
 740         .nway_reset             = dm9000_nway_reset,
 741         .get_link               = dm9000_get_link,
 742         .get_wol                = dm9000_get_wol,
 743         .set_wol                = dm9000_set_wol,
 744         .get_eeprom_len         = dm9000_get_eeprom_len,
 745         .get_eeprom             = dm9000_get_eeprom,
 746         .set_eeprom             = dm9000_set_eeprom,
 747         .get_link_ksettings     = dm9000_get_link_ksettings,
 748         .set_link_ksettings     = dm9000_set_link_ksettings,
 749 };
 750 
 751 static void dm9000_show_carrier(struct board_info *db,
 752                                 unsigned carrier, unsigned nsr)
 753 {
 754         int lpa;
 755         struct net_device *ndev = db->ndev;
 756         struct mii_if_info *mii = &db->mii;
 757         unsigned ncr = dm9000_read_locked(db, DM9000_NCR);
 758 
 759         if (carrier) {
 760                 lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
 761                 dev_info(db->dev,
 762                          "%s: link up, %dMbps, %s-duplex, lpa 0x%04X\n",
 763                          ndev->name, (nsr & NSR_SPEED) ? 10 : 100,
 764                          (ncr & NCR_FDX) ? "full" : "half", lpa);
 765         } else {
 766                 dev_info(db->dev, "%s: link down\n", ndev->name);
 767         }
 768 }
 769 
 770 static void
 771 dm9000_poll_work(struct work_struct *w)
 772 {
 773         struct delayed_work *dw = to_delayed_work(w);
 774         struct board_info *db = container_of(dw, struct board_info, phy_poll);
 775         struct net_device *ndev = db->ndev;
 776 
 777         if (db->flags & DM9000_PLATF_SIMPLE_PHY &&
 778             !(db->flags & DM9000_PLATF_EXT_PHY)) {
 779                 unsigned nsr = dm9000_read_locked(db, DM9000_NSR);
 780                 unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0;
 781                 unsigned new_carrier;
 782 
 783                 new_carrier = (nsr & NSR_LINKST) ? 1 : 0;
 784 
 785                 if (old_carrier != new_carrier) {
 786                         if (netif_msg_link(db))
 787                                 dm9000_show_carrier(db, new_carrier, nsr);
 788 
 789                         if (!new_carrier)
 790                                 netif_carrier_off(ndev);
 791                         else
 792                                 netif_carrier_on(ndev);
 793                 }
 794         } else
 795                 mii_check_media(&db->mii, netif_msg_link(db), 0);
 796 
 797         if (netif_running(ndev))
 798                 dm9000_schedule_poll(db);
 799 }
 800 
 801 /* dm9000_release_board
 802  *
 803  * release a board, and any mapped resources
 804  */
 805 
 806 static void
 807 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
 808 {
 809         /* unmap our resources */
 810 
 811         iounmap(db->io_addr);
 812         iounmap(db->io_data);
 813 
 814         /* release the resources */
 815 
 816         if (db->data_req)
 817                 release_resource(db->data_req);
 818         kfree(db->data_req);
 819 
 820         if (db->addr_req)
 821                 release_resource(db->addr_req);
 822         kfree(db->addr_req);
 823 }
 824 
 825 static unsigned char dm9000_type_to_char(enum dm9000_type type)
 826 {
 827         switch (type) {
 828         case TYPE_DM9000E: return 'e';
 829         case TYPE_DM9000A: return 'a';
 830         case TYPE_DM9000B: return 'b';
 831         }
 832 
 833         return '?';
 834 }
 835 
 836 /*
 837  *  Set DM9000 multicast address
 838  */
 839 static void
 840 dm9000_hash_table_unlocked(struct net_device *dev)
 841 {
 842         struct board_info *db = netdev_priv(dev);
 843         struct netdev_hw_addr *ha;
 844         int i, oft;
 845         u32 hash_val;
 846         u16 hash_table[4] = { 0, 0, 0, 0x8000 }; /* broadcast address */
 847         u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
 848 
 849         dm9000_dbg(db, 1, "entering %s\n", __func__);
 850 
 851         for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
 852                 iow(db, oft, dev->dev_addr[i]);
 853 
 854         if (dev->flags & IFF_PROMISC)
 855                 rcr |= RCR_PRMSC;
 856 
 857         if (dev->flags & IFF_ALLMULTI)
 858                 rcr |= RCR_ALL;
 859 
 860         /* the multicast address in Hash Table : 64 bits */
 861         netdev_for_each_mc_addr(ha, dev) {
 862                 hash_val = ether_crc_le(6, ha->addr) & 0x3f;
 863                 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
 864         }
 865 
 866         /* Write the hash table to MAC MD table */
 867         for (i = 0, oft = DM9000_MAR; i < 4; i++) {
 868                 iow(db, oft++, hash_table[i]);
 869                 iow(db, oft++, hash_table[i] >> 8);
 870         }
 871 
 872         iow(db, DM9000_RCR, rcr);
 873 }
 874 
 875 static void
 876 dm9000_hash_table(struct net_device *dev)
 877 {
 878         struct board_info *db = netdev_priv(dev);
 879         unsigned long flags;
 880 
 881         spin_lock_irqsave(&db->lock, flags);
 882         dm9000_hash_table_unlocked(dev);
 883         spin_unlock_irqrestore(&db->lock, flags);
 884 }
 885 
 886 static void
 887 dm9000_mask_interrupts(struct board_info *db)
 888 {
 889         iow(db, DM9000_IMR, IMR_PAR);
 890 }
 891 
 892 static void
 893 dm9000_unmask_interrupts(struct board_info *db)
 894 {
 895         iow(db, DM9000_IMR, db->imr_all);
 896 }
 897 
 898 /*
 899  * Initialize dm9000 board
 900  */
 901 static void
 902 dm9000_init_dm9000(struct net_device *dev)
 903 {
 904         struct board_info *db = netdev_priv(dev);
 905         unsigned int imr;
 906         unsigned int ncr;
 907 
 908         dm9000_dbg(db, 1, "entering %s\n", __func__);
 909 
 910         dm9000_reset(db);
 911         dm9000_mask_interrupts(db);
 912 
 913         /* I/O mode */
 914         db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
 915 
 916         /* Checksum mode */
 917         if (dev->hw_features & NETIF_F_RXCSUM)
 918                 iow(db, DM9000_RCSR,
 919                         (dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
 920 
 921         iow(db, DM9000_GPCR, GPCR_GEP_CNTL);    /* Let GPIO0 output */
 922         iow(db, DM9000_GPR, 0);
 923 
 924         /* If we are dealing with DM9000B, some extra steps are required: a
 925          * manual phy reset, and setting init params.
 926          */
 927         if (db->type == TYPE_DM9000B) {
 928                 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);
 929                 dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM);
 930         }
 931 
 932         ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;
 933 
 934         /* if wol is needed, then always set NCR_WAKEEN otherwise we end
 935          * up dumping the wake events if we disable this. There is already
 936          * a wake-mask in DM9000_WCR */
 937         if (db->wake_supported)
 938                 ncr |= NCR_WAKEEN;
 939 
 940         iow(db, DM9000_NCR, ncr);
 941 
 942         /* Program operating register */
 943         iow(db, DM9000_TCR, 0);         /* TX Polling clear */
 944         iow(db, DM9000_BPTR, 0x3f);     /* Less 3Kb, 200us */
 945         iow(db, DM9000_FCR, 0xff);      /* Flow Control */
 946         iow(db, DM9000_SMCR, 0);        /* Special Mode */
 947         /* clear TX status */
 948         iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
 949         iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
 950 
 951         /* Set address filter table */
 952         dm9000_hash_table_unlocked(dev);
 953 
 954         imr = IMR_PAR | IMR_PTM | IMR_PRM;
 955         if (db->type != TYPE_DM9000E)
 956                 imr |= IMR_LNKCHNG;
 957 
 958         db->imr_all = imr;
 959 
 960         /* Init Driver variable */
 961         db->tx_pkt_cnt = 0;
 962         db->queue_pkt_len = 0;
 963         netif_trans_update(dev);
 964 }
 965 
 966 /* Our watchdog timed out. Called by the networking layer */
 967 static void dm9000_timeout(struct net_device *dev)
 968 {
 969         struct board_info *db = netdev_priv(dev);
 970         u8 reg_save;
 971         unsigned long flags;
 972 
 973         /* Save previous register address */
 974         spin_lock_irqsave(&db->lock, flags);
 975         db->in_timeout = 1;
 976         reg_save = readb(db->io_addr);
 977 
 978         netif_stop_queue(dev);
 979         dm9000_init_dm9000(dev);
 980         dm9000_unmask_interrupts(db);
 981         /* We can accept TX packets again */
 982         netif_trans_update(dev); /* prevent tx timeout */
 983         netif_wake_queue(dev);
 984 
 985         /* Restore previous register address */
 986         writeb(reg_save, db->io_addr);
 987         db->in_timeout = 0;
 988         spin_unlock_irqrestore(&db->lock, flags);
 989 }
 990 
 991 static void dm9000_send_packet(struct net_device *dev,
 992                                int ip_summed,
 993                                u16 pkt_len)
 994 {
 995         struct board_info *dm = to_dm9000_board(dev);
 996 
 997         /* The DM9000 is not smart enough to leave fragmented packets alone. */
 998         if (dm->ip_summed != ip_summed) {
 999                 if (ip_summed == CHECKSUM_NONE)
1000                         iow(dm, DM9000_TCCR, 0);
1001                 else
1002                         iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP);
1003                 dm->ip_summed = ip_summed;
1004         }
1005 
1006         /* Set TX length to DM9000 */
1007         iow(dm, DM9000_TXPLL, pkt_len);
1008         iow(dm, DM9000_TXPLH, pkt_len >> 8);
1009 
1010         /* Issue TX polling command */
1011         iow(dm, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
1012 }
1013 
1014 /*
1015  *  Hardware start transmission.
1016  *  Send a packet to media from the upper layer.
1017  */
1018 static int
1019 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1020 {
1021         unsigned long flags;
1022         struct board_info *db = netdev_priv(dev);
1023 
1024         dm9000_dbg(db, 3, "%s:\n", __func__);
1025 
1026         if (db->tx_pkt_cnt > 1)
1027                 return NETDEV_TX_BUSY;
1028 
1029         spin_lock_irqsave(&db->lock, flags);
1030 
1031         /* Move data to DM9000 TX RAM */
1032         writeb(DM9000_MWCMD, db->io_addr);
1033 
1034         (db->outblk)(db->io_data, skb->data, skb->len);
1035         dev->stats.tx_bytes += skb->len;
1036 
1037         db->tx_pkt_cnt++;
1038         /* TX control: First packet immediately send, second packet queue */
1039         if (db->tx_pkt_cnt == 1) {
1040                 dm9000_send_packet(dev, skb->ip_summed, skb->len);
1041         } else {
1042                 /* Second packet */
1043                 db->queue_pkt_len = skb->len;
1044                 db->queue_ip_summed = skb->ip_summed;
1045                 netif_stop_queue(dev);
1046         }
1047 
1048         spin_unlock_irqrestore(&db->lock, flags);
1049 
1050         /* free this SKB */
1051         dev_consume_skb_any(skb);
1052 
1053         return NETDEV_TX_OK;
1054 }
1055 
1056 /*
1057  * DM9000 interrupt handler
1058  * receive the packet to upper layer, free the transmitted packet
1059  */
1060 
1061 static void dm9000_tx_done(struct net_device *dev, struct board_info *db)
1062 {
1063         int tx_status = ior(db, DM9000_NSR);    /* Got TX status */
1064 
1065         if (tx_status & (NSR_TX2END | NSR_TX1END)) {
1066                 /* One packet sent complete */
1067                 db->tx_pkt_cnt--;
1068                 dev->stats.tx_packets++;
1069 
1070                 if (netif_msg_tx_done(db))
1071                         dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);
1072 
1073                 /* Queue packet check & send */
1074                 if (db->tx_pkt_cnt > 0)
1075                         dm9000_send_packet(dev, db->queue_ip_summed,
1076                                            db->queue_pkt_len);
1077                 netif_wake_queue(dev);
1078         }
1079 }
1080 
1081 struct dm9000_rxhdr {
1082         u8      RxPktReady;
1083         u8      RxStatus;
1084         __le16  RxLen;
1085 } __packed;
1086 
1087 /*
1088  *  Received a packet and pass to upper layer
1089  */
1090 static void
1091 dm9000_rx(struct net_device *dev)
1092 {
1093         struct board_info *db = netdev_priv(dev);
1094         struct dm9000_rxhdr rxhdr;
1095         struct sk_buff *skb;
1096         u8 rxbyte, *rdptr;
1097         bool GoodPacket;
1098         int RxLen;
1099 
1100         /* Check packet ready or not */
1101         do {
1102                 ior(db, DM9000_MRCMDX); /* Dummy read */
1103 
1104                 /* Get most updated data */
1105                 rxbyte = readb(db->io_data);
1106 
1107                 /* Status check: this byte must be 0 or 1 */
1108                 if (rxbyte & DM9000_PKT_ERR) {
1109                         dev_warn(db->dev, "status check fail: %d\n", rxbyte);
1110                         iow(db, DM9000_RCR, 0x00);      /* Stop Device */
1111                         return;
1112                 }
1113 
1114                 if (!(rxbyte & DM9000_PKT_RDY))
1115                         return;
1116 
1117                 /* A packet ready now  & Get status/length */
1118                 GoodPacket = true;
1119                 writeb(DM9000_MRCMD, db->io_addr);
1120 
1121                 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
1122 
1123                 RxLen = le16_to_cpu(rxhdr.RxLen);
1124 
1125                 if (netif_msg_rx_status(db))
1126                         dev_dbg(db->dev, "RX: status %02x, length %04x\n",
1127                                 rxhdr.RxStatus, RxLen);
1128 
1129                 /* Packet Status check */
1130                 if (RxLen < 0x40) {
1131                         GoodPacket = false;
1132                         if (netif_msg_rx_err(db))
1133                                 dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
1134                 }
1135 
1136                 if (RxLen > DM9000_PKT_MAX) {
1137                         dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
1138                 }
1139 
1140                 /* rxhdr.RxStatus is identical to RSR register. */
1141                 if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE |
1142                                       RSR_PLE | RSR_RWTO |
1143                                       RSR_LCS | RSR_RF)) {
1144                         GoodPacket = false;
1145                         if (rxhdr.RxStatus & RSR_FOE) {
1146                                 if (netif_msg_rx_err(db))
1147                                         dev_dbg(db->dev, "fifo error\n");
1148                                 dev->stats.rx_fifo_errors++;
1149                         }
1150                         if (rxhdr.RxStatus & RSR_CE) {
1151                                 if (netif_msg_rx_err(db))
1152                                         dev_dbg(db->dev, "crc error\n");
1153                                 dev->stats.rx_crc_errors++;
1154                         }
1155                         if (rxhdr.RxStatus & RSR_RF) {
1156                                 if (netif_msg_rx_err(db))
1157                                         dev_dbg(db->dev, "length error\n");
1158                                 dev->stats.rx_length_errors++;
1159                         }
1160                 }
1161 
1162                 /* Move data from DM9000 */
1163                 if (GoodPacket &&
1164                     ((skb = netdev_alloc_skb(dev, RxLen + 4)) != NULL)) {
1165                         skb_reserve(skb, 2);
1166                         rdptr = skb_put(skb, RxLen - 4);
1167 
1168                         /* Read received packet from RX SRAM */
1169 
1170                         (db->inblk)(db->io_data, rdptr, RxLen);
1171                         dev->stats.rx_bytes += RxLen;
1172 
1173                         /* Pass to upper layer */
1174                         skb->protocol = eth_type_trans(skb, dev);
1175                         if (dev->features & NETIF_F_RXCSUM) {
1176                                 if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)
1177                                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1178                                 else
1179                                         skb_checksum_none_assert(skb);
1180                         }
1181                         netif_rx(skb);
1182                         dev->stats.rx_packets++;
1183 
1184                 } else {
1185                         /* need to dump the packet's data */
1186 
1187                         (db->dumpblk)(db->io_data, RxLen);
1188                 }
1189         } while (rxbyte & DM9000_PKT_RDY);
1190 }
1191 
1192 static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
1193 {
1194         struct net_device *dev = dev_id;
1195         struct board_info *db = netdev_priv(dev);
1196         int int_status;
1197         unsigned long flags;
1198         u8 reg_save;
1199 
1200         dm9000_dbg(db, 3, "entering %s\n", __func__);
1201 
1202         /* A real interrupt coming */
1203 
1204         /* holders of db->lock must always block IRQs */
1205         spin_lock_irqsave(&db->lock, flags);
1206 
1207         /* Save previous register address */
1208         reg_save = readb(db->io_addr);
1209 
1210         dm9000_mask_interrupts(db);
1211         /* Got DM9000 interrupt status */
1212         int_status = ior(db, DM9000_ISR);       /* Got ISR */
1213         iow(db, DM9000_ISR, int_status);        /* Clear ISR status */
1214 
1215         if (netif_msg_intr(db))
1216                 dev_dbg(db->dev, "interrupt status %02x\n", int_status);
1217 
1218         /* Received the coming packet */
1219         if (int_status & ISR_PRS)
1220                 dm9000_rx(dev);
1221 
1222         /* Transmit Interrupt check */
1223         if (int_status & ISR_PTS)
1224                 dm9000_tx_done(dev, db);
1225 
1226         if (db->type != TYPE_DM9000E) {
1227                 if (int_status & ISR_LNKCHNG) {
1228                         /* fire a link-change request */
1229                         schedule_delayed_work(&db->phy_poll, 1);
1230                 }
1231         }
1232 
1233         dm9000_unmask_interrupts(db);
1234         /* Restore previous register address */
1235         writeb(reg_save, db->io_addr);
1236 
1237         spin_unlock_irqrestore(&db->lock, flags);
1238 
1239         return IRQ_HANDLED;
1240 }
1241 
1242 static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id)
1243 {
1244         struct net_device *dev = dev_id;
1245         struct board_info *db = netdev_priv(dev);
1246         unsigned long flags;
1247         unsigned nsr, wcr;
1248 
1249         spin_lock_irqsave(&db->lock, flags);
1250 
1251         nsr = ior(db, DM9000_NSR);
1252         wcr = ior(db, DM9000_WCR);
1253 
1254         dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr);
1255 
1256         if (nsr & NSR_WAKEST) {
1257                 /* clear, so we can avoid */
1258                 iow(db, DM9000_NSR, NSR_WAKEST);
1259 
1260                 if (wcr & WCR_LINKST)
1261                         dev_info(db->dev, "wake by link status change\n");
1262                 if (wcr & WCR_SAMPLEST)
1263                         dev_info(db->dev, "wake by sample packet\n");
1264                 if (wcr & WCR_MAGICST)
1265                         dev_info(db->dev, "wake by magic packet\n");
1266                 if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST)))
1267                         dev_err(db->dev, "wake signalled with no reason? "
1268                                 "NSR=0x%02x, WSR=0x%02x\n", nsr, wcr);
1269         }
1270 
1271         spin_unlock_irqrestore(&db->lock, flags);
1272 
1273         return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE;
1274 }
1275 
1276 #ifdef CONFIG_NET_POLL_CONTROLLER
1277 /*
1278  *Used by netconsole
1279  */
1280 static void dm9000_poll_controller(struct net_device *dev)
1281 {
1282         disable_irq(dev->irq);
1283         dm9000_interrupt(dev->irq, dev);
1284         enable_irq(dev->irq);
1285 }
1286 #endif
1287 
1288 /*
1289  *  Open the interface.
1290  *  The interface is opened whenever "ifconfig" actives it.
1291  */
1292 static int
1293 dm9000_open(struct net_device *dev)
1294 {
1295         struct board_info *db = netdev_priv(dev);
1296         unsigned int irq_flags = irq_get_trigger_type(dev->irq);
1297 
1298         if (netif_msg_ifup(db))
1299                 dev_dbg(db->dev, "enabling %s\n", dev->name);
1300 
1301         /* If there is no IRQ type specified, tell the user that this is a
1302          * problem
1303          */
1304         if (irq_flags == IRQF_TRIGGER_NONE)
1305                 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
1306 
1307         irq_flags |= IRQF_SHARED;
1308 
1309         /* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */
1310         iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
1311         mdelay(1); /* delay needs by DM9000B */
1312 
1313         /* Initialize DM9000 board */
1314         dm9000_init_dm9000(dev);
1315 
1316         if (request_irq(dev->irq, dm9000_interrupt, irq_flags, dev->name, dev))
1317                 return -EAGAIN;
1318         /* Now that we have an interrupt handler hooked up we can unmask
1319          * our interrupts
1320          */
1321         dm9000_unmask_interrupts(db);
1322 
1323         /* Init driver variable */
1324         db->dbug_cnt = 0;
1325 
1326         mii_check_media(&db->mii, netif_msg_link(db), 1);
1327         netif_start_queue(dev);
1328 
1329         /* Poll initial link status */
1330         schedule_delayed_work(&db->phy_poll, 1);
1331 
1332         return 0;
1333 }
1334 
1335 static void
1336 dm9000_shutdown(struct net_device *dev)
1337 {
1338         struct board_info *db = netdev_priv(dev);
1339 
1340         /* RESET device */
1341         dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
1342         iow(db, DM9000_GPR, 0x01);      /* Power-Down PHY */
1343         dm9000_mask_interrupts(db);
1344         iow(db, DM9000_RCR, 0x00);      /* Disable RX */
1345 }
1346 
1347 /*
1348  * Stop the interface.
1349  * The interface is stopped when it is brought.
1350  */
1351 static int
1352 dm9000_stop(struct net_device *ndev)
1353 {
1354         struct board_info *db = netdev_priv(ndev);
1355 
1356         if (netif_msg_ifdown(db))
1357                 dev_dbg(db->dev, "shutting down %s\n", ndev->name);
1358 
1359         cancel_delayed_work_sync(&db->phy_poll);
1360 
1361         netif_stop_queue(ndev);
1362         netif_carrier_off(ndev);
1363 
1364         /* free interrupt */
1365         free_irq(ndev->irq, ndev);
1366 
1367         dm9000_shutdown(ndev);
1368 
1369         return 0;
1370 }
1371 
1372 static const struct net_device_ops dm9000_netdev_ops = {
1373         .ndo_open               = dm9000_open,
1374         .ndo_stop               = dm9000_stop,
1375         .ndo_start_xmit         = dm9000_start_xmit,
1376         .ndo_tx_timeout         = dm9000_timeout,
1377         .ndo_set_rx_mode        = dm9000_hash_table,
1378         .ndo_do_ioctl           = dm9000_ioctl,
1379         .ndo_set_features       = dm9000_set_features,
1380         .ndo_validate_addr      = eth_validate_addr,
1381         .ndo_set_mac_address    = eth_mac_addr,
1382 #ifdef CONFIG_NET_POLL_CONTROLLER
1383         .ndo_poll_controller    = dm9000_poll_controller,
1384 #endif
1385 };
1386 
1387 static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev)
1388 {
1389         struct dm9000_plat_data *pdata;
1390         struct device_node *np = dev->of_node;
1391         const void *mac_addr;
1392 
1393         if (!IS_ENABLED(CONFIG_OF) || !np)
1394                 return ERR_PTR(-ENXIO);
1395 
1396         pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
1397         if (!pdata)
1398                 return ERR_PTR(-ENOMEM);
1399 
1400         if (of_find_property(np, "davicom,ext-phy", NULL))
1401                 pdata->flags |= DM9000_PLATF_EXT_PHY;
1402         if (of_find_property(np, "davicom,no-eeprom", NULL))
1403                 pdata->flags |= DM9000_PLATF_NO_EEPROM;
1404 
1405         mac_addr = of_get_mac_address(np);
1406         if (!IS_ERR(mac_addr))
1407                 ether_addr_copy(pdata->dev_addr, mac_addr);
1408         else if (PTR_ERR(mac_addr) == -EPROBE_DEFER)
1409                 return ERR_CAST(mac_addr);
1410 
1411         return pdata;
1412 }
1413 
1414 /*
1415  * Search DM9000 board, allocate space and register it
1416  */
1417 static int
1418 dm9000_probe(struct platform_device *pdev)
1419 {
1420         struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev);
1421         struct board_info *db;  /* Point a board information structure */
1422         struct net_device *ndev;
1423         struct device *dev = &pdev->dev;
1424         const unsigned char *mac_src;
1425         int ret = 0;
1426         int iosize;
1427         int i;
1428         u32 id_val;
1429         int reset_gpios;
1430         enum of_gpio_flags flags;
1431         struct regulator *power;
1432         bool inv_mac_addr = false;
1433 
1434         power = devm_regulator_get(dev, "vcc");
1435         if (IS_ERR(power)) {
1436                 if (PTR_ERR(power) == -EPROBE_DEFER)
1437                         return -EPROBE_DEFER;
1438                 dev_dbg(dev, "no regulator provided\n");
1439         } else {
1440                 ret = regulator_enable(power);
1441                 if (ret != 0) {
1442                         dev_err(dev,
1443                                 "Failed to enable power regulator: %d\n", ret);
1444                         return ret;
1445                 }
1446                 dev_dbg(dev, "regulator enabled\n");
1447         }
1448 
1449         reset_gpios = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0,
1450                                               &flags);
1451         if (gpio_is_valid(reset_gpios)) {
1452                 ret = devm_gpio_request_one(dev, reset_gpios, flags,
1453                                             "dm9000_reset");
1454                 if (ret) {
1455                         dev_err(dev, "failed to request reset gpio %d: %d\n",
1456                                 reset_gpios, ret);
1457                         return -ENODEV;
1458                 }
1459 
1460                 /* According to manual PWRST# Low Period Min 1ms */
1461                 msleep(2);
1462                 gpio_set_value(reset_gpios, 1);
1463                 /* Needs 3ms to read eeprom when PWRST is deasserted */
1464                 msleep(4);
1465         }
1466 
1467         if (!pdata) {
1468                 pdata = dm9000_parse_dt(&pdev->dev);
1469                 if (IS_ERR(pdata))
1470                         return PTR_ERR(pdata);
1471         }
1472 
1473         /* Init network device */
1474         ndev = alloc_etherdev(sizeof(struct board_info));
1475         if (!ndev)
1476                 return -ENOMEM;
1477 
1478         SET_NETDEV_DEV(ndev, &pdev->dev);
1479 
1480         dev_dbg(&pdev->dev, "dm9000_probe()\n");
1481 
1482         /* setup board info structure */
1483         db = netdev_priv(ndev);
1484 
1485         db->dev = &pdev->dev;
1486         db->ndev = ndev;
1487 
1488         spin_lock_init(&db->lock);
1489         mutex_init(&db->addr_lock);
1490 
1491         INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work);
1492 
1493         db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1494         db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1495 
1496         if (!db->addr_res || !db->data_res) {
1497                 dev_err(db->dev, "insufficient resources addr=%p data=%p\n",
1498                         db->addr_res, db->data_res);
1499                 ret = -ENOENT;
1500                 goto out;
1501         }
1502 
1503         ndev->irq = platform_get_irq(pdev, 0);
1504         if (ndev->irq < 0) {
1505                 ret = ndev->irq;
1506                 goto out;
1507         }
1508 
1509         db->irq_wake = platform_get_irq(pdev, 1);
1510         if (db->irq_wake >= 0) {
1511                 dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake);
1512 
1513                 ret = request_irq(db->irq_wake, dm9000_wol_interrupt,
1514                                   IRQF_SHARED, dev_name(db->dev), ndev);
1515                 if (ret) {
1516                         dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret);
1517                 } else {
1518 
1519                         /* test to see if irq is really wakeup capable */
1520                         ret = irq_set_irq_wake(db->irq_wake, 1);
1521                         if (ret) {
1522                                 dev_err(db->dev, "irq %d cannot set wakeup (%d)\n",
1523                                         db->irq_wake, ret);
1524                                 ret = 0;
1525                         } else {
1526                                 irq_set_irq_wake(db->irq_wake, 0);
1527                                 db->wake_supported = 1;
1528                         }
1529                 }
1530         }
1531 
1532         iosize = resource_size(db->addr_res);
1533         db->addr_req = request_mem_region(db->addr_res->start, iosize,
1534                                           pdev->name);
1535 
1536         if (db->addr_req == NULL) {
1537                 dev_err(db->dev, "cannot claim address reg area\n");
1538                 ret = -EIO;
1539                 goto out;
1540         }
1541 
1542         db->io_addr = ioremap(db->addr_res->start, iosize);
1543 
1544         if (db->io_addr == NULL) {
1545                 dev_err(db->dev, "failed to ioremap address reg\n");
1546                 ret = -EINVAL;
1547                 goto out;
1548         }
1549 
1550         iosize = resource_size(db->data_res);
1551         db->data_req = request_mem_region(db->data_res->start, iosize,
1552                                           pdev->name);
1553 
1554         if (db->data_req == NULL) {
1555                 dev_err(db->dev, "cannot claim data reg area\n");
1556                 ret = -EIO;
1557                 goto out;
1558         }
1559 
1560         db->io_data = ioremap(db->data_res->start, iosize);
1561 
1562         if (db->io_data == NULL) {
1563                 dev_err(db->dev, "failed to ioremap data reg\n");
1564                 ret = -EINVAL;
1565                 goto out;
1566         }
1567 
1568         /* fill in parameters for net-dev structure */
1569         ndev->base_addr = (unsigned long)db->io_addr;
1570 
1571         /* ensure at least we have a default set of IO routines */
1572         dm9000_set_io(db, iosize);
1573 
1574         /* check to see if anything is being over-ridden */
1575         if (pdata != NULL) {
1576                 /* check to see if the driver wants to over-ride the
1577                  * default IO width */
1578 
1579                 if (pdata->flags & DM9000_PLATF_8BITONLY)
1580                         dm9000_set_io(db, 1);
1581 
1582                 if (pdata->flags & DM9000_PLATF_16BITONLY)
1583                         dm9000_set_io(db, 2);
1584 
1585                 if (pdata->flags & DM9000_PLATF_32BITONLY)
1586                         dm9000_set_io(db, 4);
1587 
1588                 /* check to see if there are any IO routine
1589                  * over-rides */
1590 
1591                 if (pdata->inblk != NULL)
1592                         db->inblk = pdata->inblk;
1593 
1594                 if (pdata->outblk != NULL)
1595                         db->outblk = pdata->outblk;
1596 
1597                 if (pdata->dumpblk != NULL)
1598                         db->dumpblk = pdata->dumpblk;
1599 
1600                 db->flags = pdata->flags;
1601         }
1602 
1603 #ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL
1604         db->flags |= DM9000_PLATF_SIMPLE_PHY;
1605 #endif
1606 
1607         dm9000_reset(db);
1608 
1609         /* try multiple times, DM9000 sometimes gets the read wrong */
1610         for (i = 0; i < 8; i++) {
1611                 id_val  = ior(db, DM9000_VIDL);
1612                 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
1613                 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
1614                 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
1615 
1616                 if (id_val == DM9000_ID)
1617                         break;
1618                 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
1619         }
1620 
1621         if (id_val != DM9000_ID) {
1622                 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
1623                 ret = -ENODEV;
1624                 goto out;
1625         }
1626 
1627         /* Identify what type of DM9000 we are working on */
1628 
1629         id_val = ior(db, DM9000_CHIPR);
1630         dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val);
1631 
1632         switch (id_val) {
1633         case CHIPR_DM9000A:
1634                 db->type = TYPE_DM9000A;
1635                 break;
1636         case CHIPR_DM9000B:
1637                 db->type = TYPE_DM9000B;
1638                 break;
1639         default:
1640                 dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val);
1641                 db->type = TYPE_DM9000E;
1642         }
1643 
1644         /* dm9000a/b are capable of hardware checksum offload */
1645         if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) {
1646                 ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1647                 ndev->features |= ndev->hw_features;
1648         }
1649 
1650         /* from this point we assume that we have found a DM9000 */
1651 
1652         ndev->netdev_ops        = &dm9000_netdev_ops;
1653         ndev->watchdog_timeo    = msecs_to_jiffies(watchdog);
1654         ndev->ethtool_ops       = &dm9000_ethtool_ops;
1655 
1656         db->msg_enable       = NETIF_MSG_LINK;
1657         db->mii.phy_id_mask  = 0x1f;
1658         db->mii.reg_num_mask = 0x1f;
1659         db->mii.force_media  = 0;
1660         db->mii.full_duplex  = 0;
1661         db->mii.dev          = ndev;
1662         db->mii.mdio_read    = dm9000_phy_read;
1663         db->mii.mdio_write   = dm9000_phy_write;
1664 
1665         mac_src = "eeprom";
1666 
1667         /* try reading the node address from the attached EEPROM */
1668         for (i = 0; i < 6; i += 2)
1669                 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
1670 
1671         if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) {
1672                 mac_src = "platform data";
1673                 memcpy(ndev->dev_addr, pdata->dev_addr, ETH_ALEN);
1674         }
1675 
1676         if (!is_valid_ether_addr(ndev->dev_addr)) {
1677                 /* try reading from mac */
1678 
1679                 mac_src = "chip";
1680                 for (i = 0; i < 6; i++)
1681                         ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
1682         }
1683 
1684         if (!is_valid_ether_addr(ndev->dev_addr)) {
1685                 inv_mac_addr = true;
1686                 eth_hw_addr_random(ndev);
1687                 mac_src = "random";
1688         }
1689 
1690 
1691         platform_set_drvdata(pdev, ndev);
1692         ret = register_netdev(ndev);
1693 
1694         if (ret == 0) {
1695                 if (inv_mac_addr)
1696                         dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please set using ip\n",
1697                                  ndev->name);
1698                 printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n",
1699                        ndev->name, dm9000_type_to_char(db->type),
1700                        db->io_addr, db->io_data, ndev->irq,
1701                        ndev->dev_addr, mac_src);
1702         }
1703         return 0;
1704 
1705 out:
1706         dev_err(db->dev, "not found (%d).\n", ret);
1707 
1708         dm9000_release_board(pdev, db);
1709         free_netdev(ndev);
1710 
1711         return ret;
1712 }
1713 
1714 static int
1715 dm9000_drv_suspend(struct device *dev)
1716 {
1717         struct net_device *ndev = dev_get_drvdata(dev);
1718         struct board_info *db;
1719 
1720         if (ndev) {
1721                 db = netdev_priv(ndev);
1722                 db->in_suspend = 1;
1723 
1724                 if (!netif_running(ndev))
1725                         return 0;
1726 
1727                 netif_device_detach(ndev);
1728 
1729                 /* only shutdown if not using WoL */
1730                 if (!db->wake_state)
1731                         dm9000_shutdown(ndev);
1732         }
1733         return 0;
1734 }
1735 
1736 static int
1737 dm9000_drv_resume(struct device *dev)
1738 {
1739         struct net_device *ndev = dev_get_drvdata(dev);
1740         struct board_info *db = netdev_priv(ndev);
1741 
1742         if (ndev) {
1743                 if (netif_running(ndev)) {
1744                         /* reset if we were not in wake mode to ensure if
1745                          * the device was powered off it is in a known state */
1746                         if (!db->wake_state) {
1747                                 dm9000_init_dm9000(ndev);
1748                                 dm9000_unmask_interrupts(db);
1749                         }
1750 
1751                         netif_device_attach(ndev);
1752                 }
1753 
1754                 db->in_suspend = 0;
1755         }
1756         return 0;
1757 }
1758 
1759 static const struct dev_pm_ops dm9000_drv_pm_ops = {
1760         .suspend        = dm9000_drv_suspend,
1761         .resume         = dm9000_drv_resume,
1762 };
1763 
1764 static int
1765 dm9000_drv_remove(struct platform_device *pdev)
1766 {
1767         struct net_device *ndev = platform_get_drvdata(pdev);
1768 
1769         unregister_netdev(ndev);
1770         dm9000_release_board(pdev, netdev_priv(ndev));
1771         free_netdev(ndev);              /* free device structure */
1772 
1773         dev_dbg(&pdev->dev, "released and freed device\n");
1774         return 0;
1775 }
1776 
1777 #ifdef CONFIG_OF
1778 static const struct of_device_id dm9000_of_matches[] = {
1779         { .compatible = "davicom,dm9000", },
1780         { /* sentinel */ }
1781 };
1782 MODULE_DEVICE_TABLE(of, dm9000_of_matches);
1783 #endif
1784 
1785 static struct platform_driver dm9000_driver = {
1786         .driver = {
1787                 .name    = "dm9000",
1788                 .pm      = &dm9000_drv_pm_ops,
1789                 .of_match_table = of_match_ptr(dm9000_of_matches),
1790         },
1791         .probe   = dm9000_probe,
1792         .remove  = dm9000_drv_remove,
1793 };
1794 
1795 module_platform_driver(dm9000_driver);
1796 
1797 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1798 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1799 MODULE_LICENSE("GPL");
1800 MODULE_ALIAS("platform:dm9000");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/davicom/dm9000.c

DEFINITIONS
