drivers/net/ethernet/sun/sunhme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
   3  *           auto carrier detecting ethernet driver.  Also known as the
   4  *           "Happy Meal Ethernet" found on SunSwift SBUS cards.
   5  *
   6  * Copyright (C) 1996, 1998, 1999, 2002, 2003,
   7  *              2006, 2008 David S. Miller ([email protected])
   8  *
   9  * Changes :
  10  * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
  11  *   - port to non-sparc architectures. Tested only on x86 and
  12  *     only currently works with QFE PCI cards.
  13  *   - ability to specify the MAC address at module load time by passing this
  14  *     argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/types.h>
  20 #include <linux/fcntl.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/ioport.h>
  23 #include <linux/in.h>
  24 #include <linux/slab.h>
  25 #include <linux/string.h>
  26 #include <linux/delay.h>
  27 #include <linux/init.h>
  28 #include <linux/ethtool.h>
  29 #include <linux/mii.h>
  30 #include <linux/crc32.h>
  31 #include <linux/random.h>
  32 #include <linux/errno.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/mm.h>
  37 #include <linux/bitops.h>
  38 #include <linux/dma-mapping.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/dma.h>
  42 #include <asm/byteorder.h>
  43
  44 #ifdef CONFIG_SPARC
  45 #include <linux/of.h>
  46 #include <linux/of_device.h>
  47 #include <asm/idprom.h>
  48 #include <asm/openprom.h>
  49 #include <asm/oplib.h>
  50 #include <asm/prom.h>
  51 #include <asm/auxio.h>
  52 #endif
  53 #include <linux/uaccess.h>
  54
  55 #include <asm/irq.h>
  56
  57 #ifdef CONFIG_PCI
  58 #include <linux/pci.h>
  59 #endif
  60
  61 #include "sunhme.h"
  62
  63 #define DRV_NAME        "sunhme"
  64 #define DRV_VERSION     "3.10"
  65 #define DRV_RELDATE     "August 26, 2008"
  66 #define DRV_AUTHOR      "David S. Miller ([email protected])"
  67
  68 static char version[] =
  69         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
  70
  71 MODULE_VERSION(DRV_VERSION);
  72 MODULE_AUTHOR(DRV_AUTHOR);
  73 MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
  74 MODULE_LICENSE("GPL");
  75
  76 static int macaddr[6];
  77
  78 /* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
  79 module_param_array(macaddr, int, NULL, 0);
  80 MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
  81
  82 #ifdef CONFIG_SBUS
  83 static struct quattro *qfe_sbus_list;
  84 #endif
  85
  86 #ifdef CONFIG_PCI
  87 static struct quattro *qfe_pci_list;
  88 #endif
  89
  90 #undef HMEDEBUG
  91 #undef SXDEBUG
  92 #undef RXDEBUG
  93 #undef TXDEBUG
  94 #undef TXLOGGING
  95
  96 #ifdef TXLOGGING
  97 struct hme_tx_logent {
  98         unsigned int tstamp;
  99         int tx_new, tx_old;
 100         unsigned int action;
 101 #define TXLOG_ACTION_IRQ        0x01
 102 #define TXLOG_ACTION_TXMIT      0x02
 103 #define TXLOG_ACTION_TBUSY      0x04
 104 #define TXLOG_ACTION_NBUFS      0x08
 105         unsigned int status;
 106 };
 107 #define TX_LOG_LEN      128
 108 static struct hme_tx_logent tx_log[TX_LOG_LEN];
 109 static int txlog_cur_entry;
 110 static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
 111 {
 112         struct hme_tx_logent *tlp;
 113         unsigned long flags;
 114
 115         local_irq_save(flags);
 116         tlp = &tx_log[txlog_cur_entry];
 117         tlp->tstamp = (unsigned int)jiffies;
 118         tlp->tx_new = hp->tx_new;
 119         tlp->tx_old = hp->tx_old;
 120         tlp->action = a;
 121         tlp->status = s;
 122         txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
 123         local_irq_restore(flags);
 124 }
 125 static __inline__ void tx_dump_log(void)
 126 {
 127         int i, this;
 128
 129         this = txlog_cur_entry;
 130         for (i = 0; i < TX_LOG_LEN; i++) {
 131                 printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
 132                        tx_log[this].tstamp,
 133                        tx_log[this].tx_new, tx_log[this].tx_old,
 134                        tx_log[this].action, tx_log[this].status);
 135                 this = (this + 1) & (TX_LOG_LEN - 1);
 136         }
 137 }
 138 static __inline__ void tx_dump_ring(struct happy_meal *hp)
 139 {
 140         struct hmeal_init_block *hb = hp->happy_block;
 141         struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
 142         int i;
 143
 144         for (i = 0; i < TX_RING_SIZE; i+=4) {
 145                 printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
 146                        i, i + 4,
 147                        le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
 148                        le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
 149                        le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
 150                        le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
 151         }
 152 }
 153 #else
 154 #define tx_add_log(hp, a, s)            do { } while(0)
 155 #define tx_dump_log()                   do { } while(0)
 156 #define tx_dump_ring(hp)                do { } while(0)
 157 #endif
 158
 159 #ifdef HMEDEBUG
 160 #define HMD(x)  printk x
 161 #else
 162 #define HMD(x)
 163 #endif
 164
 165 /* #define AUTO_SWITCH_DEBUG */
 166
 167 #ifdef AUTO_SWITCH_DEBUG
 168 #define ASD(x)  printk x
 169 #else
 170 #define ASD(x)
 171 #endif
 172
 173 #define DEFAULT_IPG0      16 /* For lance-mode only */
 174 #define DEFAULT_IPG1       8 /* For all modes */
 175 #define DEFAULT_IPG2       4 /* For all modes */
 176 #define DEFAULT_JAMSIZE    4 /* Toe jam */
 177
 178 /* NOTE: In the descriptor writes one _must_ write the address
 179  *       member _first_.  The card must not be allowed to see
 180  *       the updated descriptor flags until the address is
 181  *       correct.  I've added a write memory barrier between
 182  *       the two stores so that I can sleep well at night... -DaveM
 183  */
 184
 185 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
 186 static void sbus_hme_write32(void __iomem *reg, u32 val)
 187 {
 188         sbus_writel(val, reg);
 189 }
 190
 191 static u32 sbus_hme_read32(void __iomem *reg)
 192 {
 193         return sbus_readl(reg);
 194 }
 195
 196 static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
 197 {
 198         rxd->rx_addr = (__force hme32)addr;
 199         dma_wmb();
 200         rxd->rx_flags = (__force hme32)flags;
 201 }
 202
 203 static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
 204 {
 205         txd->tx_addr = (__force hme32)addr;
 206         dma_wmb();
 207         txd->tx_flags = (__force hme32)flags;
 208 }
 209
 210 static u32 sbus_hme_read_desc32(hme32 *p)
 211 {
 212         return (__force u32)*p;
 213 }
 214
 215 static void pci_hme_write32(void __iomem *reg, u32 val)
 216 {
 217         writel(val, reg);
 218 }
 219
 220 static u32 pci_hme_read32(void __iomem *reg)
 221 {
 222         return readl(reg);
 223 }
 224
 225 static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
 226 {
 227         rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
 228         dma_wmb();
 229         rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
 230 }
 231
 232 static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
 233 {
 234         txd->tx_addr = (__force hme32)cpu_to_le32(addr);
 235         dma_wmb();
 236         txd->tx_flags = (__force hme32)cpu_to_le32(flags);
 237 }
 238
 239 static u32 pci_hme_read_desc32(hme32 *p)
 240 {
 241         return le32_to_cpup((__le32 *)p);
 242 }
 243
 244 #define hme_write32(__hp, __reg, __val) \
 245         ((__hp)->write32((__reg), (__val)))
 246 #define hme_read32(__hp, __reg) \
 247         ((__hp)->read32(__reg))
 248 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
 249         ((__hp)->write_rxd((__rxd), (__flags), (__addr)))
 250 #define hme_write_txd(__hp, __txd, __flags, __addr) \
 251         ((__hp)->write_txd((__txd), (__flags), (__addr)))
 252 #define hme_read_desc32(__hp, __p) \
 253         ((__hp)->read_desc32(__p))
 254 #define hme_dma_map(__hp, __ptr, __size, __dir) \
 255         ((__hp)->dma_map((__hp)->dma_dev, (__ptr), (__size), (__dir)))
 256 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
 257         ((__hp)->dma_unmap((__hp)->dma_dev, (__addr), (__size), (__dir)))
 258 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
 259         ((__hp)->dma_sync_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir)))
 260 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
 261         ((__hp)->dma_sync_for_device((__hp)->dma_dev, (__addr), (__size), (__dir)))
 262 #else
 263 #ifdef CONFIG_SBUS
 264 /* SBUS only compilation */
 265 #define hme_write32(__hp, __reg, __val) \
 266         sbus_writel((__val), (__reg))
 267 #define hme_read32(__hp, __reg) \
 268         sbus_readl(__reg)
 269 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
 270 do {    (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
 271         dma_wmb(); \
 272         (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
 273 } while(0)
 274 #define hme_write_txd(__hp, __txd, __flags, __addr) \
 275 do {    (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
 276         dma_wmb(); \
 277         (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
 278 } while(0)
 279 #define hme_read_desc32(__hp, __p)      ((__force u32)(hme32)*(__p))
 280 #define hme_dma_map(__hp, __ptr, __size, __dir) \
 281         dma_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
 282 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
 283         dma_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
 284 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
 285         dma_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
 286 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
 287         dma_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
 288 #else
 289 /* PCI only compilation */
 290 #define hme_write32(__hp, __reg, __val) \
 291         writel((__val), (__reg))
 292 #define hme_read32(__hp, __reg) \
 293         readl(__reg)
 294 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
 295 do {    (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
 296         dma_wmb(); \
 297         (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
 298 } while(0)
 299 #define hme_write_txd(__hp, __txd, __flags, __addr) \
 300 do {    (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
 301         dma_wmb(); \
 302         (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
 303 } while(0)
 304 static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
 305 {
 306         return le32_to_cpup((__le32 *)p);
 307 }
 308 #define hme_dma_map(__hp, __ptr, __size, __dir) \
 309         pci_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
 310 #define hme_dma_unmap(__hp, __addr, __size, __dir) \
 311         pci_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
 312 #define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
 313         pci_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
 314 #define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
 315         pci_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
 316 #endif
 317 #endif
 318
 319
 320 /* Oh yes, the MIF BitBang is mighty fun to program.  BitBucket is more like it. */
 321 static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
 322 {
 323         hme_write32(hp, tregs + TCVR_BBDATA, bit);
 324         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
 325         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
 326 }
 327
 328 #if 0
 329 static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
 330 {
 331         u32 ret;
 332
 333         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
 334         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
 335         ret = hme_read32(hp, tregs + TCVR_CFG);
 336         if (internal)
 337                 ret &= TCV_CFG_MDIO0;
 338         else
 339                 ret &= TCV_CFG_MDIO1;
 340
 341         return ret;
 342 }
 343 #endif
 344
 345 static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
 346 {
 347         u32 retval;
 348
 349         hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
 350         udelay(1);
 351         retval = hme_read32(hp, tregs + TCVR_CFG);
 352         if (internal)
 353                 retval &= TCV_CFG_MDIO0;
 354         else
 355                 retval &= TCV_CFG_MDIO1;
 356         hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
 357
 358         return retval;
 359 }
 360
 361 #define TCVR_FAILURE      0x80000000     /* Impossible MIF read value */
 362
 363 static int happy_meal_bb_read(struct happy_meal *hp,
 364                               void __iomem *tregs, int reg)
 365 {
 366         u32 tmp;
 367         int retval = 0;
 368         int i;
 369
 370         ASD(("happy_meal_bb_read: reg=%d ", reg));
 371
 372         /* Enable the MIF BitBang outputs. */
 373         hme_write32(hp, tregs + TCVR_BBOENAB, 1);
 374
 375         /* Force BitBang into the idle state. */
 376         for (i = 0; i < 32; i++)
 377                 BB_PUT_BIT(hp, tregs, 1);
 378
 379         /* Give it the read sequence. */
 380         BB_PUT_BIT(hp, tregs, 0);
 381         BB_PUT_BIT(hp, tregs, 1);
 382         BB_PUT_BIT(hp, tregs, 1);
 383         BB_PUT_BIT(hp, tregs, 0);
 384
 385         /* Give it the PHY address. */
 386         tmp = hp->paddr & 0xff;
 387         for (i = 4; i >= 0; i--)
 388                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 389
 390         /* Tell it what register we want to read. */
 391         tmp = (reg & 0xff);
 392         for (i = 4; i >= 0; i--)
 393                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 394
 395         /* Close down the MIF BitBang outputs. */
 396         hme_write32(hp, tregs + TCVR_BBOENAB, 0);
 397
 398         /* Now read in the value. */
 399         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
 400         for (i = 15; i >= 0; i--)
 401                 retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
 402         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
 403         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
 404         (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
 405         ASD(("value=%x\n", retval));
 406         return retval;
 407 }
 408
 409 static void happy_meal_bb_write(struct happy_meal *hp,
 410                                 void __iomem *tregs, int reg,
 411                                 unsigned short value)
 412 {
 413         u32 tmp;
 414         int i;
 415
 416         ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));
 417
 418         /* Enable the MIF BitBang outputs. */
 419         hme_write32(hp, tregs + TCVR_BBOENAB, 1);
 420
 421         /* Force BitBang into the idle state. */
 422         for (i = 0; i < 32; i++)
 423                 BB_PUT_BIT(hp, tregs, 1);
 424
 425         /* Give it write sequence. */
 426         BB_PUT_BIT(hp, tregs, 0);
 427         BB_PUT_BIT(hp, tregs, 1);
 428         BB_PUT_BIT(hp, tregs, 0);
 429         BB_PUT_BIT(hp, tregs, 1);
 430
 431         /* Give it the PHY address. */
 432         tmp = (hp->paddr & 0xff);
 433         for (i = 4; i >= 0; i--)
 434                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 435
 436         /* Tell it what register we will be writing. */
 437         tmp = (reg & 0xff);
 438         for (i = 4; i >= 0; i--)
 439                 BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 440
 441         /* Tell it to become ready for the bits. */
 442         BB_PUT_BIT(hp, tregs, 1);
 443         BB_PUT_BIT(hp, tregs, 0);
 444
 445         for (i = 15; i >= 0; i--)
 446                 BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
 447
 448         /* Close down the MIF BitBang outputs. */
 449         hme_write32(hp, tregs + TCVR_BBOENAB, 0);
 450 }
 451
 452 #define TCVR_READ_TRIES   16
 453
 454 static int happy_meal_tcvr_read(struct happy_meal *hp,
 455                                 void __iomem *tregs, int reg)
 456 {
 457         int tries = TCVR_READ_TRIES;
 458         int retval;
 459
 460         ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
 461         if (hp->tcvr_type == none) {
 462                 ASD(("no transceiver, value=TCVR_FAILURE\n"));
 463                 return TCVR_FAILURE;
 464         }
 465
 466         if (!(hp->happy_flags & HFLAG_FENABLE)) {
 467                 ASD(("doing bit bang\n"));
 468                 return happy_meal_bb_read(hp, tregs, reg);
 469         }
 470
 471         hme_write32(hp, tregs + TCVR_FRAME,
 472                     (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
 473         while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
 474                 udelay(20);
 475         if (!tries) {
 476                 printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
 477                 return TCVR_FAILURE;
 478         }
 479         retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
 480         ASD(("value=%04x\n", retval));
 481         return retval;
 482 }
 483
 484 #define TCVR_WRITE_TRIES  16
 485
 486 static void happy_meal_tcvr_write(struct happy_meal *hp,
 487                                   void __iomem *tregs, int reg,
 488                                   unsigned short value)
 489 {
 490         int tries = TCVR_WRITE_TRIES;
 491
 492         ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));
 493
 494         /* Welcome to Sun Microsystems, can I take your order please? */
 495         if (!(hp->happy_flags & HFLAG_FENABLE)) {
 496                 happy_meal_bb_write(hp, tregs, reg, value);
 497                 return;
 498         }
 499
 500         /* Would you like fries with that? */
 501         hme_write32(hp, tregs + TCVR_FRAME,
 502                     (FRAME_WRITE | (hp->paddr << 23) |
 503                      ((reg & 0xff) << 18) | (value & 0xffff)));
 504         while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
 505                 udelay(20);
 506
 507         /* Anything else? */
 508         if (!tries)
 509                 printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");
 510
 511         /* Fifty-two cents is your change, have a nice day. */
 512 }
 513
 514 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
 515  * that keeps watching the auto negotiation process as it progresses.
 516  * The DP83840 is first told to start doing it's thing, we set up the time
 517  * and place the timer state machine in it's initial state.
 518  *
 519  * Here the timer peeks at the DP83840 status registers at each click to see
 520  * if the auto negotiation has completed, we assume here that the DP83840 PHY
 521  * will time out at some point and just tell us what (didn't) happen.  For
 522  * complete coverage we only allow so many of the ticks at this level to run,
 523  * when this has expired we print a warning message and try another strategy.
 524  * This "other" strategy is to force the interface into various speed/duplex
 525  * configurations and we stop when we see a link-up condition before the
 526  * maximum number of "peek" ticks have occurred.
 527  *
 528  * Once a valid link status has been detected we configure the BigMAC and
 529  * the rest of the Happy Meal to speak the most efficient protocol we could
 530  * get a clean link for.  The priority for link configurations, highest first
 531  * is:
 532  *                 100 Base-T Full Duplex
 533  *                 100 Base-T Half Duplex
 534  *                 10 Base-T Full Duplex
 535  *                 10 Base-T Half Duplex
 536  *
 537  * We start a new timer now, after a successful auto negotiation status has
 538  * been detected.  This timer just waits for the link-up bit to get set in
 539  * the BMCR of the DP83840.  When this occurs we print a kernel log message
 540  * describing the link type in use and the fact that it is up.
 541  *
 542  * If a fatal error of some sort is signalled and detected in the interrupt
 543  * service routine, and the chip is reset, or the link is ifconfig'd down
 544  * and then back up, this entire process repeats itself all over again.
 545  */
 546 static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
 547 {
 548         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 549
 550         /* Downgrade from full to half duplex.  Only possible
 551          * via ethtool.
 552          */
 553         if (hp->sw_bmcr & BMCR_FULLDPLX) {
 554                 hp->sw_bmcr &= ~(BMCR_FULLDPLX);
 555                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 556                 return 0;
 557         }
 558
 559         /* Downgrade from 100 to 10. */
 560         if (hp->sw_bmcr & BMCR_SPEED100) {
 561                 hp->sw_bmcr &= ~(BMCR_SPEED100);
 562                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 563                 return 0;
 564         }
 565
 566         /* We've tried everything. */
 567         return -1;
 568 }
 569
 570 static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
 571 {
 572         printk(KERN_INFO "%s: Link is up using ", hp->dev->name);
 573         if (hp->tcvr_type == external)
 574                 printk("external ");
 575         else
 576                 printk("internal ");
 577         printk("transceiver at ");
 578         hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
 579         if (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) {
 580                 if (hp->sw_lpa & LPA_100FULL)
 581                         printk("100Mb/s, Full Duplex.\n");
 582                 else
 583                         printk("100Mb/s, Half Duplex.\n");
 584         } else {
 585                 if (hp->sw_lpa & LPA_10FULL)
 586                         printk("10Mb/s, Full Duplex.\n");
 587                 else
 588                         printk("10Mb/s, Half Duplex.\n");
 589         }
 590 }
 591
 592 static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
 593 {
 594         printk(KERN_INFO "%s: Link has been forced up using ", hp->dev->name);
 595         if (hp->tcvr_type == external)
 596                 printk("external ");
 597         else
 598                 printk("internal ");
 599         printk("transceiver at ");
 600         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 601         if (hp->sw_bmcr & BMCR_SPEED100)
 602                 printk("100Mb/s, ");
 603         else
 604                 printk("10Mb/s, ");
 605         if (hp->sw_bmcr & BMCR_FULLDPLX)
 606                 printk("Full Duplex.\n");
 607         else
 608                 printk("Half Duplex.\n");
 609 }
 610
 611 static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
 612 {
 613         int full;
 614
 615         /* All we care about is making sure the bigmac tx_cfg has a
 616          * proper duplex setting.
 617          */
 618         if (hp->timer_state == arbwait) {
 619                 hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
 620                 if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
 621                         goto no_response;
 622                 if (hp->sw_lpa & LPA_100FULL)
 623                         full = 1;
 624                 else if (hp->sw_lpa & LPA_100HALF)
 625                         full = 0;
 626                 else if (hp->sw_lpa & LPA_10FULL)
 627                         full = 1;
 628                 else
 629                         full = 0;
 630         } else {
 631                 /* Forcing a link mode. */
 632                 hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 633                 if (hp->sw_bmcr & BMCR_FULLDPLX)
 634                         full = 1;
 635                 else
 636                         full = 0;
 637         }
 638
 639         /* Before changing other bits in the tx_cfg register, and in
 640          * general any of other the TX config registers too, you
 641          * must:
 642          * 1) Clear Enable
 643          * 2) Poll with reads until that bit reads back as zero
 644          * 3) Make TX configuration changes
 645          * 4) Set Enable once more
 646          */
 647         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
 648                     hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
 649                     ~(BIGMAC_TXCFG_ENABLE));
 650         while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
 651                 barrier();
 652         if (full) {
 653                 hp->happy_flags |= HFLAG_FULL;
 654                 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
 655                             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
 656                             BIGMAC_TXCFG_FULLDPLX);
 657         } else {
 658                 hp->happy_flags &= ~(HFLAG_FULL);
 659                 hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
 660                             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
 661                             ~(BIGMAC_TXCFG_FULLDPLX));
 662         }
 663         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
 664                     hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
 665                     BIGMAC_TXCFG_ENABLE);
 666         return 0;
 667 no_response:
 668         return 1;
 669 }
 670
 671 static int happy_meal_init(struct happy_meal *hp);
 672
 673 static int is_lucent_phy(struct happy_meal *hp)
 674 {
 675         void __iomem *tregs = hp->tcvregs;
 676         unsigned short mr2, mr3;
 677         int ret = 0;
 678
 679         mr2 = happy_meal_tcvr_read(hp, tregs, 2);
 680         mr3 = happy_meal_tcvr_read(hp, tregs, 3);
 681         if ((mr2 & 0xffff) == 0x0180 &&
 682             ((mr3 & 0xffff) >> 10) == 0x1d)
 683                 ret = 1;
 684
 685         return ret;
 686 }
 687
 688 static void happy_meal_timer(struct timer_list *t)
 689 {
 690         struct happy_meal *hp = from_timer(hp, t, happy_timer);
 691         void __iomem *tregs = hp->tcvregs;
 692         int restart_timer = 0;
 693
 694         spin_lock_irq(&hp->happy_lock);
 695
 696         hp->timer_ticks++;
 697         switch(hp->timer_state) {
 698         case arbwait:
 699                 /* Only allow for 5 ticks, thats 10 seconds and much too
 700                  * long to wait for arbitration to complete.
 701                  */
 702                 if (hp->timer_ticks >= 10) {
 703                         /* Enter force mode. */
 704         do_force_mode:
 705                         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 706                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
 707                                hp->dev->name);
 708                         hp->sw_bmcr = BMCR_SPEED100;
 709                         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 710
 711                         if (!is_lucent_phy(hp)) {
 712                                 /* OK, seems we need do disable the transceiver for the first
 713                                  * tick to make sure we get an accurate link state at the
 714                                  * second tick.
 715                                  */
 716                                 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
 717                                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
 718                                 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
 719                         }
 720                         hp->timer_state = ltrywait;
 721                         hp->timer_ticks = 0;
 722                         restart_timer = 1;
 723                 } else {
 724                         /* Anything interesting happen? */
 725                         hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
 726                         if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
 727                                 int ret;
 728
 729                                 /* Just what we've been waiting for... */
 730                                 ret = set_happy_link_modes(hp, tregs);
 731                                 if (ret) {
 732                                         /* Ooops, something bad happened, go to force
 733                                          * mode.
 734                                          *
 735                                          * XXX Broken hubs which don't support 802.3u
 736                                          * XXX auto-negotiation make this happen as well.
 737                                          */
 738                                         goto do_force_mode;
 739                                 }
 740
 741                                 /* Success, at least so far, advance our state engine. */
 742                                 hp->timer_state = lupwait;
 743                                 restart_timer = 1;
 744                         } else {
 745                                 restart_timer = 1;
 746                         }
 747                 }
 748                 break;
 749
 750         case lupwait:
 751                 /* Auto negotiation was successful and we are awaiting a
 752                  * link up status.  I have decided to let this timer run
 753                  * forever until some sort of error is signalled, reporting
 754                  * a message to the user at 10 second intervals.
 755                  */
 756                 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
 757                 if (hp->sw_bmsr & BMSR_LSTATUS) {
 758                         /* Wheee, it's up, display the link mode in use and put
 759                          * the timer to sleep.
 760                          */
 761                         display_link_mode(hp, tregs);
 762                         hp->timer_state = asleep;
 763                         restart_timer = 0;
 764                 } else {
 765                         if (hp->timer_ticks >= 10) {
 766                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
 767                                        "not completely up.\n", hp->dev->name);
 768                                 hp->timer_ticks = 0;
 769                                 restart_timer = 1;
 770                         } else {
 771                                 restart_timer = 1;
 772                         }
 773                 }
 774                 break;
 775
 776         case ltrywait:
 777                 /* Making the timeout here too long can make it take
 778                  * annoyingly long to attempt all of the link mode
 779                  * permutations, but then again this is essentially
 780                  * error recovery code for the most part.
 781                  */
 782                 hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
 783                 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
 784                 if (hp->timer_ticks == 1) {
 785                         if (!is_lucent_phy(hp)) {
 786                                 /* Re-enable transceiver, we'll re-enable the transceiver next
 787                                  * tick, then check link state on the following tick.
 788                                  */
 789                                 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
 790                                 happy_meal_tcvr_write(hp, tregs,
 791                                                       DP83840_CSCONFIG, hp->sw_csconfig);
 792                         }
 793                         restart_timer = 1;
 794                         break;
 795                 }
 796                 if (hp->timer_ticks == 2) {
 797                         if (!is_lucent_phy(hp)) {
 798                                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
 799                                 happy_meal_tcvr_write(hp, tregs,
 800                                                       DP83840_CSCONFIG, hp->sw_csconfig);
 801                         }
 802                         restart_timer = 1;
 803                         break;
 804                 }
 805                 if (hp->sw_bmsr & BMSR_LSTATUS) {
 806                         /* Force mode selection success. */
 807                         display_forced_link_mode(hp, tregs);
 808                         set_happy_link_modes(hp, tregs); /* XXX error? then what? */
 809                         hp->timer_state = asleep;
 810                         restart_timer = 0;
 811                 } else {
 812                         if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
 813                                 int ret;
 814
 815                                 ret = try_next_permutation(hp, tregs);
 816                                 if (ret == -1) {
 817                                         /* Aieee, tried them all, reset the
 818                                          * chip and try all over again.
 819                                          */
 820
 821                                         /* Let the user know... */
 822                                         printk(KERN_NOTICE "%s: Link down, cable problem?\n",
 823                                                hp->dev->name);
 824
 825                                         ret = happy_meal_init(hp);
 826                                         if (ret) {
 827                                                 /* ho hum... */
 828                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 829                                                        "Happy Meal.\n", hp->dev->name);
 830                                         }
 831                                         goto out;
 832                                 }
 833                                 if (!is_lucent_phy(hp)) {
 834                                         hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
 835                                                                                DP83840_CSCONFIG);
 836                                         hp->sw_csconfig |= CSCONFIG_TCVDISAB;
 837                                         happy_meal_tcvr_write(hp, tregs,
 838                                                               DP83840_CSCONFIG, hp->sw_csconfig);
 839                                 }
 840                                 hp->timer_ticks = 0;
 841                                 restart_timer = 1;
 842                         } else {
 843                                 restart_timer = 1;
 844                         }
 845                 }
 846                 break;
 847
 848         case asleep:
 849         default:
 850                 /* Can't happens.... */
 851                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 852                        hp->dev->name);
 853                 restart_timer = 0;
 854                 hp->timer_ticks = 0;
 855                 hp->timer_state = asleep; /* foo on you */
 856                 break;
 857         }
 858
 859         if (restart_timer) {
 860                 hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 861                 add_timer(&hp->happy_timer);
 862         }
 863
 864 out:
 865         spin_unlock_irq(&hp->happy_lock);
 866 }
 867
 868 #define TX_RESET_TRIES     32
 869 #define RX_RESET_TRIES     32
 870
 871 /* hp->happy_lock must be held */
 872 static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
 873 {
 874         int tries = TX_RESET_TRIES;
 875
 876         HMD(("happy_meal_tx_reset: reset, "));
 877
 878         /* Would you like to try our SMCC Delux? */
 879         hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
 880         while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
 881                 udelay(20);
 882
 883         /* Lettuce, tomato, buggy hardware (no extra charge)? */
 884         if (!tries)
 885                 printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");
 886
 887         /* Take care. */
 888         HMD(("done\n"));
 889 }
 890
 891 /* hp->happy_lock must be held */
 892 static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
 893 {
 894         int tries = RX_RESET_TRIES;
 895
 896         HMD(("happy_meal_rx_reset: reset, "));
 897
 898         /* We have a special on GNU/Viking hardware bugs today. */
 899         hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
 900         while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
 901                 udelay(20);
 902
 903         /* Will that be all? */
 904         if (!tries)
 905                 printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");
 906
 907         /* Don't forget your vik_1137125_wa.  Have a nice day. */
 908         HMD(("done\n"));
 909 }
 910
 911 #define STOP_TRIES         16
 912
 913 /* hp->happy_lock must be held */
 914 static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
 915 {
 916         int tries = STOP_TRIES;
 917
 918         HMD(("happy_meal_stop: reset, "));
 919
 920         /* We're consolidating our STB products, it's your lucky day. */
 921         hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
 922         while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
 923                 udelay(20);
 924
 925         /* Come back next week when we are "Sun Microelectronics". */
 926         if (!tries)
 927                 printk(KERN_ERR "happy meal: Fry guys.");
 928
 929         /* Remember: "Different name, same old buggy as shit hardware." */
 930         HMD(("done\n"));
 931 }
 932
 933 /* hp->happy_lock must be held */
 934 static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
 935 {
 936         struct net_device_stats *stats = &hp->dev->stats;
 937
 938         stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
 939         hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
 940
 941         stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
 942         hme_write32(hp, bregs + BMAC_UNALECTR, 0);
 943
 944         stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
 945         hme_write32(hp, bregs + BMAC_GLECTR, 0);
 946
 947         stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
 948
 949         stats->collisions +=
 950                 (hme_read32(hp, bregs + BMAC_EXCTR) +
 951                  hme_read32(hp, bregs + BMAC_LTCTR));
 952         hme_write32(hp, bregs + BMAC_EXCTR, 0);
 953         hme_write32(hp, bregs + BMAC_LTCTR, 0);
 954 }
 955
 956 /* hp->happy_lock must be held */
 957 static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
 958 {
 959         ASD(("happy_meal_poll_stop: "));
 960
 961         /* If polling disabled or not polling already, nothing to do. */
 962         if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
 963            (HFLAG_POLLENABLE | HFLAG_POLL)) {
 964                 HMD(("not polling, return\n"));
 965                 return;
 966         }
 967
 968         /* Shut up the MIF. */
 969         ASD(("were polling, mif ints off, "));
 970         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
 971
 972         /* Turn off polling. */
 973         ASD(("polling off, "));
 974         hme_write32(hp, tregs + TCVR_CFG,
 975                     hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
 976
 977         /* We are no longer polling. */
 978         hp->happy_flags &= ~(HFLAG_POLL);
 979
 980         /* Let the bits set. */
 981         udelay(200);
 982         ASD(("done\n"));
 983 }
 984
 985 /* Only Sun can take such nice parts and fuck up the programming interface
 986  * like this.  Good job guys...
 987  */
 988 #define TCVR_RESET_TRIES       16 /* It should reset quickly        */
 989 #define TCVR_UNISOLATE_TRIES   32 /* Dis-isolation can take longer. */
 990
 991 /* hp->happy_lock must be held */
 992 static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
 993 {
 994         u32 tconfig;
 995         int result, tries = TCVR_RESET_TRIES;
 996
 997         tconfig = hme_read32(hp, tregs + TCVR_CFG);
 998         ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
 999         if (hp->tcvr_type == external) {
1000                 ASD(("external<"));
1001                 hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
1002                 hp->tcvr_type = internal;
1003                 hp->paddr = TCV_PADDR_ITX;
1004                 ASD(("ISOLATE,"));
1005                 happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1006                                       (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1007                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1008                 if (result == TCVR_FAILURE) {
1009                         ASD(("phyread_fail>\n"));
1010                         return -1;
1011                 }
1012                 ASD(("phyread_ok,PSELECT>"));
1013                 hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1014                 hp->tcvr_type = external;
1015                 hp->paddr = TCV_PADDR_ETX;
1016         } else {
1017                 if (tconfig & TCV_CFG_MDIO1) {
1018                         ASD(("internal<PSELECT,"));
1019                         hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
1020                         ASD(("ISOLATE,"));
1021                         happy_meal_tcvr_write(hp, tregs, MII_BMCR,
1022                                               (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
1023                         result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1024                         if (result == TCVR_FAILURE) {
1025                                 ASD(("phyread_fail>\n"));
1026                                 return -1;
1027                         }
1028                         ASD(("phyread_ok,~PSELECT>"));
1029                         hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
1030                         hp->tcvr_type = internal;
1031                         hp->paddr = TCV_PADDR_ITX;
1032                 }
1033         }
1034
1035         ASD(("BMCR_RESET "));
1036         happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
1037
1038         while (--tries) {
1039                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1040                 if (result == TCVR_FAILURE)
1041                         return -1;
1042                 hp->sw_bmcr = result;
1043                 if (!(result & BMCR_RESET))
1044                         break;
1045                 udelay(20);
1046         }
1047         if (!tries) {
1048                 ASD(("BMCR RESET FAILED!\n"));
1049                 return -1;
1050         }
1051         ASD(("RESET_OK\n"));
1052
1053         /* Get fresh copies of the PHY registers. */
1054         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1055         hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1056         hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1057         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1058
1059         ASD(("UNISOLATE"));
1060         hp->sw_bmcr &= ~(BMCR_ISOLATE);
1061         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1062
1063         tries = TCVR_UNISOLATE_TRIES;
1064         while (--tries) {
1065                 result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1066                 if (result == TCVR_FAILURE)
1067                         return -1;
1068                 if (!(result & BMCR_ISOLATE))
1069                         break;
1070                 udelay(20);
1071         }
1072         if (!tries) {
1073                 ASD((" FAILED!\n"));
1074                 return -1;
1075         }
1076         ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
1077         if (!is_lucent_phy(hp)) {
1078                 result = happy_meal_tcvr_read(hp, tregs,
1079                                               DP83840_CSCONFIG);
1080                 happy_meal_tcvr_write(hp, tregs,
1081                                       DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
1082         }
1083         return 0;
1084 }
1085
1086 /* Figure out whether we have an internal or external transceiver.
1087  *
1088  * hp->happy_lock must be held
1089  */
1090 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
1091 {
1092         unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
1093
1094         ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
1095         if (hp->happy_flags & HFLAG_POLL) {
1096                 /* If we are polling, we must stop to get the transceiver type. */
1097                 ASD(("<polling> "));
1098                 if (hp->tcvr_type == internal) {
1099                         if (tconfig & TCV_CFG_MDIO1) {
1100                                 ASD(("<internal> <poll stop> "));
1101                                 happy_meal_poll_stop(hp, tregs);
1102                                 hp->paddr = TCV_PADDR_ETX;
1103                                 hp->tcvr_type = external;
1104                                 ASD(("<external>\n"));
1105                                 tconfig &= ~(TCV_CFG_PENABLE);
1106                                 tconfig |= TCV_CFG_PSELECT;
1107                                 hme_write32(hp, tregs + TCVR_CFG, tconfig);
1108                         }
1109                 } else {
1110                         if (hp->tcvr_type == external) {
1111                                 ASD(("<external> "));
1112                                 if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
1113                                         ASD(("<poll stop> "));
1114                                         happy_meal_poll_stop(hp, tregs);
1115                                         hp->paddr = TCV_PADDR_ITX;
1116                                         hp->tcvr_type = internal;
1117                                         ASD(("<internal>\n"));
1118                                         hme_write32(hp, tregs + TCVR_CFG,
1119                                                     hme_read32(hp, tregs + TCVR_CFG) &
1120                                                     ~(TCV_CFG_PSELECT));
1121                                 }
1122                                 ASD(("\n"));
1123                         } else {
1124                                 ASD(("<none>\n"));
1125                         }
1126                 }
1127         } else {
1128                 u32 reread = hme_read32(hp, tregs + TCVR_CFG);
1129
1130                 /* Else we can just work off of the MDIO bits. */
1131                 ASD(("<not polling> "));
1132                 if (reread & TCV_CFG_MDIO1) {
1133                         hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
1134                         hp->paddr = TCV_PADDR_ETX;
1135                         hp->tcvr_type = external;
1136                         ASD(("<external>\n"));
1137                 } else {
1138                         if (reread & TCV_CFG_MDIO0) {
1139                                 hme_write32(hp, tregs + TCVR_CFG,
1140                                             tconfig & ~(TCV_CFG_PSELECT));
1141                                 hp->paddr = TCV_PADDR_ITX;
1142                                 hp->tcvr_type = internal;
1143                                 ASD(("<internal>\n"));
1144                         } else {
1145                                 printk(KERN_ERR "happy meal: Transceiver and a coke please.");
1146                                 hp->tcvr_type = none; /* Grrr... */
1147                                 ASD(("<none>\n"));
1148                         }
1149                 }
1150         }
1151 }
1152
1153 /* The receive ring buffers are a bit tricky to get right.  Here goes...
1154  *
1155  * The buffers we dma into must be 64 byte aligned.  So we use a special
1156  * alloc_skb() routine for the happy meal to allocate 64 bytes more than
1157  * we really need.
1158  *
1159  * We use skb_reserve() to align the data block we get in the skb.  We
1160  * also program the etxregs->cfg register to use an offset of 2.  This
1161  * imperical constant plus the ethernet header size will always leave
1162  * us with a nicely aligned ip header once we pass things up to the
1163  * protocol layers.
1164  *
1165  * The numbers work out to:
1166  *
1167  *         Max ethernet frame size         1518
1168  *         Ethernet header size              14
1169  *         Happy Meal base offset             2
1170  *
1171  * Say a skb data area is at 0xf001b010, and its size alloced is
1172  * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
1173  *
1174  * First our alloc_skb() routine aligns the data base to a 64 byte
1175  * boundary.  We now have 0xf001b040 as our skb data address.  We
1176  * plug this into the receive descriptor address.
1177  *
1178  * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
1179  * So now the data we will end up looking at starts at 0xf001b042.  When
1180  * the packet arrives, we will check out the size received and subtract
1181  * this from the skb->length.  Then we just pass the packet up to the
1182  * protocols as is, and allocate a new skb to replace this slot we have
1183  * just received from.
1184  *
1185  * The ethernet layer will strip the ether header from the front of the
1186  * skb we just sent to it, this leaves us with the ip header sitting
1187  * nicely aligned at 0xf001b050.  Also, for tcp and udp packets the
1188  * Happy Meal has even checksummed the tcp/udp data for us.  The 16
1189  * bit checksum is obtained from the low bits of the receive descriptor
1190  * flags, thus:
1191  *
1192  *      skb->csum = rxd->rx_flags & 0xffff;
1193  *      skb->ip_summed = CHECKSUM_COMPLETE;
1194  *
1195  * before sending off the skb to the protocols, and we are good as gold.
1196  */
1197 static void happy_meal_clean_rings(struct happy_meal *hp)
1198 {
1199         int i;
1200
1201         for (i = 0; i < RX_RING_SIZE; i++) {
1202                 if (hp->rx_skbs[i] != NULL) {
1203                         struct sk_buff *skb = hp->rx_skbs[i];
1204                         struct happy_meal_rxd *rxd;
1205                         u32 dma_addr;
1206
1207                         rxd = &hp->happy_block->happy_meal_rxd[i];
1208                         dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
1209                         dma_unmap_single(hp->dma_dev, dma_addr,
1210                                          RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
1211                         dev_kfree_skb_any(skb);
1212                         hp->rx_skbs[i] = NULL;
1213                 }
1214         }
1215
1216         for (i = 0; i < TX_RING_SIZE; i++) {
1217                 if (hp->tx_skbs[i] != NULL) {
1218                         struct sk_buff *skb = hp->tx_skbs[i];
1219                         struct happy_meal_txd *txd;
1220                         u32 dma_addr;
1221                         int frag;
1222
1223                         hp->tx_skbs[i] = NULL;
1224
1225                         for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1226                                 txd = &hp->happy_block->happy_meal_txd[i];
1227                                 dma_addr = hme_read_desc32(hp, &txd->tx_addr);
1228                                 if (!frag)
1229                                         dma_unmap_single(hp->dma_dev, dma_addr,
1230                                                          (hme_read_desc32(hp, &txd->tx_flags)
1231                                                           & TXFLAG_SIZE),
1232                                                          DMA_TO_DEVICE);
1233                                 else
1234                                         dma_unmap_page(hp->dma_dev, dma_addr,
1235                                                          (hme_read_desc32(hp, &txd->tx_flags)
1236                                                           & TXFLAG_SIZE),
1237                                                          DMA_TO_DEVICE);
1238
1239                                 if (frag != skb_shinfo(skb)->nr_frags)
1240                                         i++;
1241                         }
1242
1243                         dev_kfree_skb_any(skb);
1244                 }
1245         }
1246 }
1247
1248 /* hp->happy_lock must be held */
1249 static void happy_meal_init_rings(struct happy_meal *hp)
1250 {
1251         struct hmeal_init_block *hb = hp->happy_block;
1252         int i;
1253
1254         HMD(("happy_meal_init_rings: counters to zero, "));
1255         hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
1256
1257         /* Free any skippy bufs left around in the rings. */
1258         HMD(("clean, "));
1259         happy_meal_clean_rings(hp);
1260
1261         /* Now get new skippy bufs for the receive ring. */
1262         HMD(("init rxring, "));
1263         for (i = 0; i < RX_RING_SIZE; i++) {
1264                 struct sk_buff *skb;
1265                 u32 mapping;
1266
1267                 skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
1268                 if (!skb) {
1269                         hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
1270                         continue;
1271                 }
1272                 hp->rx_skbs[i] = skb;
1273
1274                 /* Because we reserve afterwards. */
1275                 skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
1276                 mapping = dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
1277                                          DMA_FROM_DEVICE);
1278                 if (dma_mapping_error(hp->dma_dev, mapping)) {
1279                         dev_kfree_skb_any(skb);
1280                         hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
1281                         continue;
1282                 }
1283                 hme_write_rxd(hp, &hb->happy_meal_rxd[i],
1284                               (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
1285                               mapping);
1286                 skb_reserve(skb, RX_OFFSET);
1287         }
1288
1289         HMD(("init txring, "));
1290         for (i = 0; i < TX_RING_SIZE; i++)
1291                 hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
1292
1293         HMD(("done\n"));
1294 }
1295
1296 /* hp->happy_lock must be held */
1297 static void
1298 happy_meal_begin_auto_negotiation(struct happy_meal *hp,
1299                                   void __iomem *tregs,
1300                                   const struct ethtool_link_ksettings *ep)
1301 {
1302         int timeout;
1303
1304         /* Read all of the registers we are interested in now. */
1305         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1306         hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1307         hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
1308         hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
1309
1310         /* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
1311
1312         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1313         if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
1314                 /* Advertise everything we can support. */
1315                 if (hp->sw_bmsr & BMSR_10HALF)
1316                         hp->sw_advertise |= (ADVERTISE_10HALF);
1317                 else
1318                         hp->sw_advertise &= ~(ADVERTISE_10HALF);
1319
1320                 if (hp->sw_bmsr & BMSR_10FULL)
1321                         hp->sw_advertise |= (ADVERTISE_10FULL);
1322                 else
1323                         hp->sw_advertise &= ~(ADVERTISE_10FULL);
1324                 if (hp->sw_bmsr & BMSR_100HALF)
1325                         hp->sw_advertise |= (ADVERTISE_100HALF);
1326                 else
1327                         hp->sw_advertise &= ~(ADVERTISE_100HALF);
1328                 if (hp->sw_bmsr & BMSR_100FULL)
1329                         hp->sw_advertise |= (ADVERTISE_100FULL);
1330                 else
1331                         hp->sw_advertise &= ~(ADVERTISE_100FULL);
1332                 happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1333
1334                 /* XXX Currently no Happy Meal cards I know off support 100BaseT4,
1335                  * XXX and this is because the DP83840 does not support it, changes
1336                  * XXX would need to be made to the tx/rx logic in the driver as well
1337                  * XXX so I completely skip checking for it in the BMSR for now.
1338                  */
1339
1340 #ifdef AUTO_SWITCH_DEBUG
1341                 ASD(("%s: Advertising [ ", hp->dev->name));
1342                 if (hp->sw_advertise & ADVERTISE_10HALF)
1343                         ASD(("10H "));
1344                 if (hp->sw_advertise & ADVERTISE_10FULL)
1345                         ASD(("10F "));
1346                 if (hp->sw_advertise & ADVERTISE_100HALF)
1347                         ASD(("100H "));
1348                 if (hp->sw_advertise & ADVERTISE_100FULL)
1349                         ASD(("100F "));
1350 #endif
1351
1352                 /* Enable Auto-Negotiation, this is usually on already... */
1353                 hp->sw_bmcr |= BMCR_ANENABLE;
1354                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1355
1356                 /* Restart it to make sure it is going. */
1357                 hp->sw_bmcr |= BMCR_ANRESTART;
1358                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1359
1360                 /* BMCR_ANRESTART self clears when the process has begun. */
1361
1362                 timeout = 64;  /* More than enough. */
1363                 while (--timeout) {
1364                         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1365                         if (!(hp->sw_bmcr & BMCR_ANRESTART))
1366                                 break; /* got it. */
1367                         udelay(10);
1368                 }
1369                 if (!timeout) {
1370                         printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
1371                                "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
1372                         printk(KERN_NOTICE "%s: Performing force link detection.\n",
1373                                hp->dev->name);
1374                         goto force_link;
1375                 } else {
1376                         hp->timer_state = arbwait;
1377                 }
1378         } else {
1379 force_link:
1380                 /* Force the link up, trying first a particular mode.
1381                  * Either we are here at the request of ethtool or
1382                  * because the Happy Meal would not start to autoneg.
1383                  */
1384
1385                 /* Disable auto-negotiation in BMCR, enable the duplex and
1386                  * speed setting, init the timer state machine, and fire it off.
1387                  */
1388                 if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
1389                         hp->sw_bmcr = BMCR_SPEED100;
1390                 } else {
1391                         if (ep->base.speed == SPEED_100)
1392                                 hp->sw_bmcr = BMCR_SPEED100;
1393                         else
1394                                 hp->sw_bmcr = 0;
1395                         if (ep->base.duplex == DUPLEX_FULL)
1396                                 hp->sw_bmcr |= BMCR_FULLDPLX;
1397                 }
1398                 happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1399
1400                 if (!is_lucent_phy(hp)) {
1401                         /* OK, seems we need do disable the transceiver for the first
1402                          * tick to make sure we get an accurate link state at the
1403                          * second tick.
1404                          */
1405                         hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
1406                                                                DP83840_CSCONFIG);
1407                         hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
1408                         happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
1409                                               hp->sw_csconfig);
1410                 }
1411                 hp->timer_state = ltrywait;
1412         }
1413
1414         hp->timer_ticks = 0;
1415         hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
1416         add_timer(&hp->happy_timer);
1417 }
1418
1419 /* hp->happy_lock must be held */
1420 static int happy_meal_init(struct happy_meal *hp)
1421 {
1422         void __iomem *gregs        = hp->gregs;
1423         void __iomem *etxregs      = hp->etxregs;
1424         void __iomem *erxregs      = hp->erxregs;
1425         void __iomem *bregs        = hp->bigmacregs;
1426         void __iomem *tregs        = hp->tcvregs;
1427         u32 regtmp, rxcfg;
1428         unsigned char *e = &hp->dev->dev_addr[0];
1429
1430         /* If auto-negotiation timer is running, kill it. */
1431         del_timer(&hp->happy_timer);
1432
1433         HMD(("happy_meal_init: happy_flags[%08x] ",
1434              hp->happy_flags));
1435         if (!(hp->happy_flags & HFLAG_INIT)) {
1436                 HMD(("set HFLAG_INIT, "));
1437                 hp->happy_flags |= HFLAG_INIT;
1438                 happy_meal_get_counters(hp, bregs);
1439         }
1440
1441         /* Stop polling. */
1442         HMD(("to happy_meal_poll_stop\n"));
1443         happy_meal_poll_stop(hp, tregs);
1444
1445         /* Stop transmitter and receiver. */
1446         HMD(("happy_meal_init: to happy_meal_stop\n"));
1447         happy_meal_stop(hp, gregs);
1448
1449         /* Alloc and reset the tx/rx descriptor chains. */
1450         HMD(("happy_meal_init: to happy_meal_init_rings\n"));
1451         happy_meal_init_rings(hp);
1452
1453         /* Shut up the MIF. */
1454         HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
1455              hme_read32(hp, tregs + TCVR_IMASK)));
1456         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1457
1458         /* See if we can enable the MIF frame on this card to speak to the DP83840. */
1459         if (hp->happy_flags & HFLAG_FENABLE) {
1460                 HMD(("use frame old[%08x], ",
1461                      hme_read32(hp, tregs + TCVR_CFG)));
1462                 hme_write32(hp, tregs + TCVR_CFG,
1463                             hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1464         } else {
1465                 HMD(("use bitbang old[%08x], ",
1466                      hme_read32(hp, tregs + TCVR_CFG)));
1467                 hme_write32(hp, tregs + TCVR_CFG,
1468                             hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1469         }
1470
1471         /* Check the state of the transceiver. */
1472         HMD(("to happy_meal_transceiver_check\n"));
1473         happy_meal_transceiver_check(hp, tregs);
1474
1475         /* Put the Big Mac into a sane state. */
1476         HMD(("happy_meal_init: "));
1477         switch(hp->tcvr_type) {
1478         case none:
1479                 /* Cannot operate if we don't know the transceiver type! */
1480                 HMD(("AAIEEE no transceiver type, EAGAIN"));
1481                 return -EAGAIN;
1482
1483         case internal:
1484                 /* Using the MII buffers. */
1485                 HMD(("internal, using MII, "));
1486                 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1487                 break;
1488
1489         case external:
1490                 /* Not using the MII, disable it. */
1491                 HMD(("external, disable MII, "));
1492                 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1493                 break;
1494         }
1495
1496         if (happy_meal_tcvr_reset(hp, tregs))
1497                 return -EAGAIN;
1498
1499         /* Reset the Happy Meal Big Mac transceiver and the receiver. */
1500         HMD(("tx/rx reset, "));
1501         happy_meal_tx_reset(hp, bregs);
1502         happy_meal_rx_reset(hp, bregs);
1503
1504         /* Set jam size and inter-packet gaps to reasonable defaults. */
1505         HMD(("jsize/ipg1/ipg2, "));
1506         hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
1507         hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
1508         hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
1509
1510         /* Load up the MAC address and random seed. */
1511         HMD(("rseed/macaddr, "));
1512
1513         /* The docs recommend to use the 10LSB of our MAC here. */
1514         hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
1515
1516         hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
1517         hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
1518         hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
1519
1520         HMD(("htable, "));
1521         if ((hp->dev->flags & IFF_ALLMULTI) ||
1522             (netdev_mc_count(hp->dev) > 64)) {
1523                 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
1524                 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
1525                 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
1526                 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
1527         } else if ((hp->dev->flags & IFF_PROMISC) == 0) {
1528                 u16 hash_table[4];
1529                 struct netdev_hw_addr *ha;
1530                 u32 crc;
1531
1532                 memset(hash_table, 0, sizeof(hash_table));
1533                 netdev_for_each_mc_addr(ha, hp->dev) {
1534                         crc = ether_crc_le(6, ha->addr);
1535                         crc >>= 26;
1536                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1537                 }
1538                 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
1539                 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
1540                 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
1541                 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
1542         } else {
1543                 hme_write32(hp, bregs + BMAC_HTABLE3, 0);
1544                 hme_write32(hp, bregs + BMAC_HTABLE2, 0);
1545                 hme_write32(hp, bregs + BMAC_HTABLE1, 0);
1546                 hme_write32(hp, bregs + BMAC_HTABLE0, 0);
1547         }
1548
1549         /* Set the RX and TX ring ptrs. */
1550         HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
1551              ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
1552              ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
1553         hme_write32(hp, erxregs + ERX_RING,
1554                     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
1555         hme_write32(hp, etxregs + ETX_RING,
1556                     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
1557
1558         /* Parity issues in the ERX unit of some HME revisions can cause some
1559          * registers to not be written unless their parity is even.  Detect such
1560          * lost writes and simply rewrite with a low bit set (which will be ignored
1561          * since the rxring needs to be 2K aligned).
1562          */
1563         if (hme_read32(hp, erxregs + ERX_RING) !=
1564             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
1565                 hme_write32(hp, erxregs + ERX_RING,
1566                             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
1567                             | 0x4);
1568
1569         /* Set the supported burst sizes. */
1570         HMD(("happy_meal_init: old[%08x] bursts<",
1571              hme_read32(hp, gregs + GREG_CFG)));
1572
1573 #ifndef CONFIG_SPARC
1574         /* It is always PCI and can handle 64byte bursts. */
1575         hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
1576 #else
1577         if ((hp->happy_bursts & DMA_BURST64) &&
1578             ((hp->happy_flags & HFLAG_PCI) != 0
1579 #ifdef CONFIG_SBUS
1580              || sbus_can_burst64()
1581 #endif
1582              || 0)) {
1583                 u32 gcfg = GREG_CFG_BURST64;
1584
1585                 /* I have no idea if I should set the extended
1586                  * transfer mode bit for Cheerio, so for now I
1587                  * do not.  -DaveM
1588                  */
1589 #ifdef CONFIG_SBUS
1590                 if ((hp->happy_flags & HFLAG_PCI) == 0) {
1591                         struct platform_device *op = hp->happy_dev;
1592                         if (sbus_can_dma_64bit()) {
1593                                 sbus_set_sbus64(&op->dev,
1594                                                 hp->happy_bursts);
1595                                 gcfg |= GREG_CFG_64BIT;
1596                         }
1597                 }
1598 #endif
1599
1600                 HMD(("64>"));
1601                 hme_write32(hp, gregs + GREG_CFG, gcfg);
1602         } else if (hp->happy_bursts & DMA_BURST32) {
1603                 HMD(("32>"));
1604                 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
1605         } else if (hp->happy_bursts & DMA_BURST16) {
1606                 HMD(("16>"));
1607                 hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
1608         } else {
1609                 HMD(("XXX>"));
1610                 hme_write32(hp, gregs + GREG_CFG, 0);
1611         }
1612 #endif /* CONFIG_SPARC */
1613
1614         /* Turn off interrupts we do not want to hear. */
1615         HMD((", enable global interrupts, "));
1616         hme_write32(hp, gregs + GREG_IMASK,
1617                     (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
1618                      GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
1619
1620         /* Set the transmit ring buffer size. */
1621         HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
1622              hme_read32(hp, etxregs + ETX_RSIZE)));
1623         hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
1624
1625         /* Enable transmitter DVMA. */
1626         HMD(("tx dma enable old[%08x], ",
1627              hme_read32(hp, etxregs + ETX_CFG)));
1628         hme_write32(hp, etxregs + ETX_CFG,
1629                     hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
1630
1631         /* This chip really rots, for the receiver sometimes when you
1632          * write to its control registers not all the bits get there
1633          * properly.  I cannot think of a sane way to provide complete
1634          * coverage for this hardware bug yet.
1635          */
1636         HMD(("erx regs bug old[%08x]\n",
1637              hme_read32(hp, erxregs + ERX_CFG)));
1638         hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1639         regtmp = hme_read32(hp, erxregs + ERX_CFG);
1640         hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
1641         if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
1642                 printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
1643                 printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
1644                        ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
1645                 /* XXX Should return failure here... */
1646         }
1647
1648         /* Enable Big Mac hash table filter. */
1649         HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
1650              hme_read32(hp, bregs + BMAC_RXCFG)));
1651         rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
1652         if (hp->dev->flags & IFF_PROMISC)
1653                 rxcfg |= BIGMAC_RXCFG_PMISC;
1654         hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
1655
1656         /* Let the bits settle in the chip. */
1657         udelay(10);
1658
1659         /* Ok, configure the Big Mac transmitter. */
1660         HMD(("BIGMAC init, "));
1661         regtmp = 0;
1662         if (hp->happy_flags & HFLAG_FULL)
1663                 regtmp |= BIGMAC_TXCFG_FULLDPLX;
1664
1665         /* Don't turn on the "don't give up" bit for now.  It could cause hme
1666          * to deadlock with the PHY if a Jabber occurs.
1667          */
1668         hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
1669
1670         /* Give up after 16 TX attempts. */
1671         hme_write32(hp, bregs + BMAC_ALIMIT, 16);
1672
1673         /* Enable the output drivers no matter what. */
1674         regtmp = BIGMAC_XCFG_ODENABLE;
1675
1676         /* If card can do lance mode, enable it. */
1677         if (hp->happy_flags & HFLAG_LANCE)
1678                 regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
1679
1680         /* Disable the MII buffers if using external transceiver. */
1681         if (hp->tcvr_type == external)
1682                 regtmp |= BIGMAC_XCFG_MIIDISAB;
1683
1684         HMD(("XIF config old[%08x], ",
1685              hme_read32(hp, bregs + BMAC_XIFCFG)));
1686         hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
1687
1688         /* Start things up. */
1689         HMD(("tx old[%08x] and rx [%08x] ON!\n",
1690              hme_read32(hp, bregs + BMAC_TXCFG),
1691              hme_read32(hp, bregs + BMAC_RXCFG)));
1692
1693         /* Set larger TX/RX size to allow for 802.1q */
1694         hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
1695         hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
1696
1697         hme_write32(hp, bregs + BMAC_TXCFG,
1698                     hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
1699         hme_write32(hp, bregs + BMAC_RXCFG,
1700                     hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
1701
1702         /* Get the autonegotiation started, and the watch timer ticking. */
1703         happy_meal_begin_auto_negotiation(hp, tregs, NULL);
1704
1705         /* Success. */
1706         return 0;
1707 }
1708
1709 /* hp->happy_lock must be held */
1710 static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
1711 {
1712         void __iomem *tregs     = hp->tcvregs;
1713         void __iomem *bregs     = hp->bigmacregs;
1714         void __iomem *gregs     = hp->gregs;
1715
1716         happy_meal_stop(hp, gregs);
1717         hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
1718         if (hp->happy_flags & HFLAG_FENABLE)
1719                 hme_write32(hp, tregs + TCVR_CFG,
1720                             hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
1721         else
1722                 hme_write32(hp, tregs + TCVR_CFG,
1723                             hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
1724         happy_meal_transceiver_check(hp, tregs);
1725         switch(hp->tcvr_type) {
1726         case none:
1727                 return;
1728         case internal:
1729                 hme_write32(hp, bregs + BMAC_XIFCFG, 0);
1730                 break;
1731         case external:
1732                 hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
1733                 break;
1734         }
1735         if (happy_meal_tcvr_reset(hp, tregs))
1736                 return;
1737
1738         /* Latch PHY registers as of now. */
1739         hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
1740         hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
1741
1742         /* Advertise everything we can support. */
1743         if (hp->sw_bmsr & BMSR_10HALF)
1744                 hp->sw_advertise |= (ADVERTISE_10HALF);
1745         else
1746                 hp->sw_advertise &= ~(ADVERTISE_10HALF);
1747
1748         if (hp->sw_bmsr & BMSR_10FULL)
1749                 hp->sw_advertise |= (ADVERTISE_10FULL);
1750         else
1751                 hp->sw_advertise &= ~(ADVERTISE_10FULL);
1752         if (hp->sw_bmsr & BMSR_100HALF)
1753                 hp->sw_advertise |= (ADVERTISE_100HALF);
1754         else
1755                 hp->sw_advertise &= ~(ADVERTISE_100HALF);
1756         if (hp->sw_bmsr & BMSR_100FULL)
1757                 hp->sw_advertise |= (ADVERTISE_100FULL);
1758         else
1759                 hp->sw_advertise &= ~(ADVERTISE_100FULL);
1760
1761         /* Update the PHY advertisement register. */
1762         happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
1763 }
1764
1765 /* Once status is latched (by happy_meal_interrupt) it is cleared by
1766  * the hardware, so we cannot re-read it and get a correct value.
1767  *
1768  * hp->happy_lock must be held
1769  */
1770 static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
1771 {
1772         int reset = 0;
1773
1774         /* Only print messages for non-counter related interrupts. */
1775         if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
1776                       GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
1777                       GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
1778                       GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
1779                       GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
1780                       GREG_STAT_SLVPERR))
1781                 printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
1782                        hp->dev->name, status);
1783
1784         if (status & GREG_STAT_RFIFOVF) {
1785                 /* Receive FIFO overflow is harmless and the hardware will take
1786                    care of it, just some packets are lost. Who cares. */
1787                 printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
1788         }
1789
1790         if (status & GREG_STAT_STSTERR) {
1791                 /* BigMAC SQE link test failed. */
1792                 printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
1793                 reset = 1;
1794         }
1795
1796         if (status & GREG_STAT_TFIFO_UND) {
1797                 /* Transmit FIFO underrun, again DMA error likely. */
1798                 printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
1799                        hp->dev->name);
1800                 reset = 1;
1801         }
1802
1803         if (status & GREG_STAT_MAXPKTERR) {
1804                 /* Driver error, tried to transmit something larger
1805                  * than ethernet max mtu.
1806                  */
1807                 printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
1808                 reset = 1;
1809         }
1810
1811         if (status & GREG_STAT_NORXD) {
1812                 /* This is harmless, it just means the system is
1813                  * quite loaded and the incoming packet rate was
1814                  * faster than the interrupt handler could keep up
1815                  * with.
1816                  */
1817                 printk(KERN_INFO "%s: Happy Meal out of receive "
1818                        "descriptors, packet dropped.\n",
1819                        hp->dev->name);
1820         }
1821
1822         if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
1823                 /* All sorts of DMA receive errors. */
1824                 printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
1825                 if (status & GREG_STAT_RXERR)
1826                         printk("GenericError ");
1827                 if (status & GREG_STAT_RXPERR)
1828                         printk("ParityError ");
1829                 if (status & GREG_STAT_RXTERR)
1830                         printk("RxTagBotch ");
1831                 printk("]\n");
1832                 reset = 1;
1833         }
1834
1835         if (status & GREG_STAT_EOPERR) {
1836                 /* Driver bug, didn't set EOP bit in tx descriptor given
1837                  * to the happy meal.
1838                  */
1839                 printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
1840                        hp->dev->name);
1841                 reset = 1;
1842         }
1843
1844         if (status & GREG_STAT_MIFIRQ) {
1845                 /* MIF signalled an interrupt, were we polling it? */
1846                 printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
1847         }
1848
1849         if (status &
1850             (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
1851                 /* All sorts of transmit DMA errors. */
1852                 printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
1853                 if (status & GREG_STAT_TXEACK)
1854                         printk("GenericError ");
1855                 if (status & GREG_STAT_TXLERR)
1856                         printk("LateError ");
1857                 if (status & GREG_STAT_TXPERR)
1858                         printk("ParityError ");
1859                 if (status & GREG_STAT_TXTERR)
1860                         printk("TagBotch ");
1861                 printk("]\n");
1862                 reset = 1;
1863         }
1864
1865         if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
1866                 /* Bus or parity error when cpu accessed happy meal registers
1867                  * or it's internal FIFO's.  Should never see this.
1868                  */
1869                 printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
1870                        hp->dev->name,
1871                        (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
1872                 reset = 1;
1873         }
1874
1875         if (reset) {
1876                 printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
1877                 happy_meal_init(hp);
1878                 return 1;
1879         }
1880         return 0;
1881 }
1882
1883 /* hp->happy_lock must be held */
1884 static void happy_meal_mif_interrupt(struct happy_meal *hp)
1885 {
1886         void __iomem *tregs = hp->tcvregs;
1887
1888         printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
1889         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
1890         hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
1891
1892         /* Use the fastest transmission protocol possible. */
1893         if (hp->sw_lpa & LPA_100FULL) {
1894                 printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
1895                 hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
1896         } else if (hp->sw_lpa & LPA_100HALF) {
1897                 printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
1898                 hp->sw_bmcr |= BMCR_SPEED100;
1899         } else if (hp->sw_lpa & LPA_10FULL) {
1900                 printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
1901                 hp->sw_bmcr |= BMCR_FULLDPLX;
1902         } else {
1903                 printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
1904         }
1905         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
1906
1907         /* Finally stop polling and shut up the MIF. */
1908         happy_meal_poll_stop(hp, tregs);
1909 }
1910
1911 #ifdef TXDEBUG
1912 #define TXD(x) printk x
1913 #else
1914 #define TXD(x)
1915 #endif
1916
1917 /* hp->happy_lock must be held */
1918 static void happy_meal_tx(struct happy_meal *hp)
1919 {
1920         struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
1921         struct happy_meal_txd *this;
1922         struct net_device *dev = hp->dev;
1923         int elem;
1924
1925         elem = hp->tx_old;
1926         TXD(("TX<"));
1927         while (elem != hp->tx_new) {
1928                 struct sk_buff *skb;
1929                 u32 flags, dma_addr, dma_len;
1930                 int frag;
1931
1932                 TXD(("[%d]", elem));
1933                 this = &txbase[elem];
1934                 flags = hme_read_desc32(hp, &this->tx_flags);
1935                 if (flags & TXFLAG_OWN)
1936                         break;
1937                 skb = hp->tx_skbs[elem];
1938                 if (skb_shinfo(skb)->nr_frags) {
1939                         int last;
1940
1941                         last = elem + skb_shinfo(skb)->nr_frags;
1942                         last &= (TX_RING_SIZE - 1);
1943                         flags = hme_read_desc32(hp, &txbase[last].tx_flags);
1944                         if (flags & TXFLAG_OWN)
1945                                 break;
1946                 }
1947                 hp->tx_skbs[elem] = NULL;
1948                 dev->stats.tx_bytes += skb->len;
1949
1950                 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1951                         dma_addr = hme_read_desc32(hp, &this->tx_addr);
1952                         dma_len = hme_read_desc32(hp, &this->tx_flags);
1953
1954                         dma_len &= TXFLAG_SIZE;
1955                         if (!frag)
1956                                 dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1957                         else
1958                                 dma_unmap_page(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
1959
1960                         elem = NEXT_TX(elem);
1961                         this = &txbase[elem];
1962                 }
1963
1964                 dev_consume_skb_irq(skb);
1965                 dev->stats.tx_packets++;
1966         }
1967         hp->tx_old = elem;
1968         TXD((">"));
1969
1970         if (netif_queue_stopped(dev) &&
1971             TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
1972                 netif_wake_queue(dev);
1973 }
1974
1975 #ifdef RXDEBUG
1976 #define RXD(x) printk x
1977 #else
1978 #define RXD(x)
1979 #endif
1980
1981 /* Originally I used to handle the allocation failure by just giving back just
1982  * that one ring buffer to the happy meal.  Problem is that usually when that
1983  * condition is triggered, the happy meal expects you to do something reasonable
1984  * with all of the packets it has DMA'd in.  So now I just drop the entire
1985  * ring when we cannot get a new skb and give them all back to the happy meal,
1986  * maybe things will be "happier" now.
1987  *
1988  * hp->happy_lock must be held
1989  */
1990 static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
1991 {
1992         struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
1993         struct happy_meal_rxd *this;
1994         int elem = hp->rx_new, drops = 0;
1995         u32 flags;
1996
1997         RXD(("RX<"));
1998         this = &rxbase[elem];
1999         while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
2000                 struct sk_buff *skb;
2001                 int len = flags >> 16;
2002                 u16 csum = flags & RXFLAG_CSUM;
2003                 u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
2004
2005                 RXD(("[%d ", elem));
2006
2007                 /* Check for errors. */
2008                 if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
2009                         RXD(("ERR(%08x)]", flags));
2010                         dev->stats.rx_errors++;
2011                         if (len < ETH_ZLEN)
2012                                 dev->stats.rx_length_errors++;
2013                         if (len & (RXFLAG_OVERFLOW >> 16)) {
2014                                 dev->stats.rx_over_errors++;
2015                                 dev->stats.rx_fifo_errors++;
2016                         }
2017
2018                         /* Return it to the Happy meal. */
2019         drop_it:
2020                         dev->stats.rx_dropped++;
2021                         hme_write_rxd(hp, this,
2022                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2023                                       dma_addr);
2024                         goto next;
2025                 }
2026                 skb = hp->rx_skbs[elem];
2027                 if (len > RX_COPY_THRESHOLD) {
2028                         struct sk_buff *new_skb;
2029                         u32 mapping;
2030
2031                         /* Now refill the entry, if we can. */
2032                         new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
2033                         if (new_skb == NULL) {
2034                                 drops++;
2035                                 goto drop_it;
2036                         }
2037                         skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
2038                         mapping = dma_map_single(hp->dma_dev, new_skb->data,
2039                                                  RX_BUF_ALLOC_SIZE,
2040                                                  DMA_FROM_DEVICE);
2041                         if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
2042                                 dev_kfree_skb_any(new_skb);
2043                                 drops++;
2044                                 goto drop_it;
2045                         }
2046
2047                         dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
2048                         hp->rx_skbs[elem] = new_skb;
2049                         hme_write_rxd(hp, this,
2050                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2051                                       mapping);
2052                         skb_reserve(new_skb, RX_OFFSET);
2053
2054                         /* Trim the original skb for the netif. */
2055                         skb_trim(skb, len);
2056                 } else {
2057                         struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2);
2058
2059                         if (copy_skb == NULL) {
2060                                 drops++;
2061                                 goto drop_it;
2062                         }
2063
2064                         skb_reserve(copy_skb, 2);
2065                         skb_put(copy_skb, len);
2066                         dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2067                         skb_copy_from_linear_data(skb, copy_skb->data, len);
2068                         dma_sync_single_for_device(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
2069                         /* Reuse original ring buffer. */
2070                         hme_write_rxd(hp, this,
2071                                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
2072                                       dma_addr);
2073
2074                         skb = copy_skb;
2075                 }
2076
2077                 /* This card is _fucking_ hot... */
2078                 skb->csum = csum_unfold(~(__force __sum16)htons(csum));
2079                 skb->ip_summed = CHECKSUM_COMPLETE;
2080
2081                 RXD(("len=%d csum=%4x]", len, csum));
2082                 skb->protocol = eth_type_trans(skb, dev);
2083                 netif_rx(skb);
2084
2085                 dev->stats.rx_packets++;
2086                 dev->stats.rx_bytes += len;
2087         next:
2088                 elem = NEXT_RX(elem);
2089                 this = &rxbase[elem];
2090         }
2091         hp->rx_new = elem;
2092         if (drops)
2093                 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
2094         RXD((">"));
2095 }
2096
2097 static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
2098 {
2099         struct net_device *dev = dev_id;
2100         struct happy_meal *hp  = netdev_priv(dev);
2101         u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
2102
2103         HMD(("happy_meal_interrupt: status=%08x ", happy_status));
2104
2105         spin_lock(&hp->happy_lock);
2106
2107         if (happy_status & GREG_STAT_ERRORS) {
2108                 HMD(("ERRORS "));
2109                 if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
2110                         goto out;
2111         }
2112
2113         if (happy_status & GREG_STAT_MIFIRQ) {
2114                 HMD(("MIFIRQ "));
2115                 happy_meal_mif_interrupt(hp);
2116         }
2117
2118         if (happy_status & GREG_STAT_TXALL) {
2119                 HMD(("TXALL "));
2120                 happy_meal_tx(hp);
2121         }
2122
2123         if (happy_status & GREG_STAT_RXTOHOST) {
2124                 HMD(("RXTOHOST "));
2125                 happy_meal_rx(hp, dev);
2126         }
2127
2128         HMD(("done\n"));
2129 out:
2130         spin_unlock(&hp->happy_lock);
2131
2132         return IRQ_HANDLED;
2133 }
2134
2135 #ifdef CONFIG_SBUS
2136 static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
2137 {
2138         struct quattro *qp = (struct quattro *) cookie;
2139         int i;
2140
2141         for (i = 0; i < 4; i++) {
2142                 struct net_device *dev = qp->happy_meals[i];
2143                 struct happy_meal *hp  = netdev_priv(dev);
2144                 u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
2145
2146                 HMD(("quattro_interrupt: status=%08x ", happy_status));
2147
2148                 if (!(happy_status & (GREG_STAT_ERRORS |
2149                                       GREG_STAT_MIFIRQ |
2150                                       GREG_STAT_TXALL |
2151                                       GREG_STAT_RXTOHOST)))
2152                         continue;
2153
2154                 spin_lock(&hp->happy_lock);
2155
2156                 if (happy_status & GREG_STAT_ERRORS) {
2157                         HMD(("ERRORS "));
2158                         if (happy_meal_is_not_so_happy(hp, happy_status))
2159                                 goto next;
2160                 }
2161
2162                 if (happy_status & GREG_STAT_MIFIRQ) {
2163                         HMD(("MIFIRQ "));
2164                         happy_meal_mif_interrupt(hp);
2165                 }
2166
2167                 if (happy_status & GREG_STAT_TXALL) {
2168                         HMD(("TXALL "));
2169                         happy_meal_tx(hp);
2170                 }
2171
2172                 if (happy_status & GREG_STAT_RXTOHOST) {
2173                         HMD(("RXTOHOST "));
2174                         happy_meal_rx(hp, dev);
2175                 }
2176
2177         next:
2178                 spin_unlock(&hp->happy_lock);
2179         }
2180         HMD(("done\n"));
2181
2182         return IRQ_HANDLED;
2183 }
2184 #endif
2185
2186 static int happy_meal_open(struct net_device *dev)
2187 {
2188         struct happy_meal *hp = netdev_priv(dev);
2189         int res;
2190
2191         HMD(("happy_meal_open: "));
2192
2193         /* On SBUS Quattro QFE cards, all hme interrupts are concentrated
2194          * into a single source which we register handling at probe time.
2195          */
2196         if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
2197                 res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
2198                                   dev->name, dev);
2199                 if (res) {
2200                         HMD(("EAGAIN\n"));
2201                         printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
2202                                hp->irq);
2203
2204                         return -EAGAIN;
2205                 }
2206         }
2207
2208         HMD(("to happy_meal_init\n"));
2209
2210         spin_lock_irq(&hp->happy_lock);
2211         res = happy_meal_init(hp);
2212         spin_unlock_irq(&hp->happy_lock);
2213
2214         if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
2215                 free_irq(hp->irq, dev);
2216         return res;
2217 }
2218
2219 static int happy_meal_close(struct net_device *dev)
2220 {
2221         struct happy_meal *hp = netdev_priv(dev);
2222
2223         spin_lock_irq(&hp->happy_lock);
2224         happy_meal_stop(hp, hp->gregs);
2225         happy_meal_clean_rings(hp);
2226
2227         /* If auto-negotiation timer is running, kill it. */
2228         del_timer(&hp->happy_timer);
2229
2230         spin_unlock_irq(&hp->happy_lock);
2231
2232         /* On Quattro QFE cards, all hme interrupts are concentrated
2233          * into a single source which we register handling at probe
2234          * time and never unregister.
2235          */
2236         if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
2237                 free_irq(hp->irq, dev);
2238
2239         return 0;
2240 }
2241
2242 #ifdef SXDEBUG
2243 #define SXD(x) printk x
2244 #else
2245 #define SXD(x)
2246 #endif
2247
2248 static void happy_meal_tx_timeout(struct net_device *dev, unsigned int txqueue)
2249 {
2250         struct happy_meal *hp = netdev_priv(dev);
2251
2252         printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
2253         tx_dump_log();
2254         printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
2255                 hme_read32(hp, hp->gregs + GREG_STAT),
2256                 hme_read32(hp, hp->etxregs + ETX_CFG),
2257                 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
2258
2259         spin_lock_irq(&hp->happy_lock);
2260         happy_meal_init(hp);
2261         spin_unlock_irq(&hp->happy_lock);
2262
2263         netif_wake_queue(dev);
2264 }
2265
2266 static void unmap_partial_tx_skb(struct happy_meal *hp, u32 first_mapping,
2267                                  u32 first_len, u32 first_entry, u32 entry)
2268 {
2269         struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
2270
2271         dma_unmap_single(hp->dma_dev, first_mapping, first_len, DMA_TO_DEVICE);
2272
2273         first_entry = NEXT_TX(first_entry);
2274         while (first_entry != entry) {
2275                 struct happy_meal_txd *this = &txbase[first_entry];
2276                 u32 addr, len;
2277
2278                 addr = hme_read_desc32(hp, &this->tx_addr);
2279                 len = hme_read_desc32(hp, &this->tx_flags);
2280                 len &= TXFLAG_SIZE;
2281                 dma_unmap_page(hp->dma_dev, addr, len, DMA_TO_DEVICE);
2282         }
2283 }
2284
2285 static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
2286                                          struct net_device *dev)
2287 {
2288         struct happy_meal *hp = netdev_priv(dev);
2289         int entry;
2290         u32 tx_flags;
2291
2292         tx_flags = TXFLAG_OWN;
2293         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2294                 const u32 csum_start_off = skb_checksum_start_offset(skb);
2295                 const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
2296
2297                 tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
2298                             ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
2299                             ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
2300         }
2301
2302         spin_lock_irq(&hp->happy_lock);
2303
2304         if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
2305                 netif_stop_queue(dev);
2306                 spin_unlock_irq(&hp->happy_lock);
2307                 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
2308                        dev->name);
2309                 return NETDEV_TX_BUSY;
2310         }
2311
2312         entry = hp->tx_new;
2313         SXD(("SX<l[%d]e[%d]>", len, entry));
2314         hp->tx_skbs[entry] = skb;
2315
2316         if (skb_shinfo(skb)->nr_frags == 0) {
2317                 u32 mapping, len;
2318
2319                 len = skb->len;
2320                 mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
2321                 if (unlikely(dma_mapping_error(hp->dma_dev, mapping)))
2322                         goto out_dma_error;
2323                 tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
2324                 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2325                               (tx_flags | (len & TXFLAG_SIZE)),
2326                               mapping);
2327                 entry = NEXT_TX(entry);
2328         } else {
2329                 u32 first_len, first_mapping;
2330                 int frag, first_entry = entry;
2331
2332                 /* We must give this initial chunk to the device last.
2333                  * Otherwise we could race with the device.
2334                  */
2335                 first_len = skb_headlen(skb);
2336                 first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
2337                                                DMA_TO_DEVICE);
2338                 if (unlikely(dma_mapping_error(hp->dma_dev, first_mapping)))
2339                         goto out_dma_error;
2340                 entry = NEXT_TX(entry);
2341
2342                 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
2343                         const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
2344                         u32 len, mapping, this_txflags;
2345
2346                         len = skb_frag_size(this_frag);
2347                         mapping = skb_frag_dma_map(hp->dma_dev, this_frag,
2348                                                    0, len, DMA_TO_DEVICE);
2349                         if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
2350                                 unmap_partial_tx_skb(hp, first_mapping, first_len,
2351                                                      first_entry, entry);
2352                                 goto out_dma_error;
2353                         }
2354                         this_txflags = tx_flags;
2355                         if (frag == skb_shinfo(skb)->nr_frags - 1)
2356                                 this_txflags |= TXFLAG_EOP;
2357                         hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
2358                                       (this_txflags | (len & TXFLAG_SIZE)),
2359                                       mapping);
2360                         entry = NEXT_TX(entry);
2361                 }
2362                 hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
2363                               (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
2364                               first_mapping);
2365         }
2366
2367         hp->tx_new = entry;
2368
2369         if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
2370                 netif_stop_queue(dev);
2371
2372         /* Get it going. */
2373         hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
2374
2375         spin_unlock_irq(&hp->happy_lock);
2376
2377         tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
2378         return NETDEV_TX_OK;
2379
2380 out_dma_error:
2381         hp->tx_skbs[hp->tx_new] = NULL;
2382         spin_unlock_irq(&hp->happy_lock);
2383
2384         dev_kfree_skb_any(skb);
2385         dev->stats.tx_dropped++;
2386         return NETDEV_TX_OK;
2387 }
2388
2389 static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
2390 {
2391         struct happy_meal *hp = netdev_priv(dev);
2392
2393         spin_lock_irq(&hp->happy_lock);
2394         happy_meal_get_counters(hp, hp->bigmacregs);
2395         spin_unlock_irq(&hp->happy_lock);
2396
2397         return &dev->stats;
2398 }
2399
2400 static void happy_meal_set_multicast(struct net_device *dev)
2401 {
2402         struct happy_meal *hp = netdev_priv(dev);
2403         void __iomem *bregs = hp->bigmacregs;
2404         struct netdev_hw_addr *ha;
2405         u32 crc;
2406
2407         spin_lock_irq(&hp->happy_lock);
2408
2409         if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
2410                 hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
2411                 hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
2412                 hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
2413                 hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
2414         } else if (dev->flags & IFF_PROMISC) {
2415                 hme_write32(hp, bregs + BMAC_RXCFG,
2416                             hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
2417         } else {
2418                 u16 hash_table[4];
2419
2420                 memset(hash_table, 0, sizeof(hash_table));
2421                 netdev_for_each_mc_addr(ha, dev) {
2422                         crc = ether_crc_le(6, ha->addr);
2423                         crc >>= 26;
2424                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
2425                 }
2426                 hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
2427                 hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
2428                 hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
2429                 hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
2430         }
2431
2432         spin_unlock_irq(&hp->happy_lock);
2433 }
2434
2435 /* Ethtool support... */
2436 static int hme_get_link_ksettings(struct net_device *dev,
2437                                   struct ethtool_link_ksettings *cmd)
2438 {
2439         struct happy_meal *hp = netdev_priv(dev);
2440         u32 speed;
2441         u32 supported;
2442
2443         supported =
2444                 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2445                  SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2446                  SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
2447
2448         /* XXX hardcoded stuff for now */
2449         cmd->base.port = PORT_TP; /* XXX no MII support */
2450         cmd->base.phy_address = 0; /* XXX fixed PHYAD */
2451
2452         /* Record PHY settings. */
2453         spin_lock_irq(&hp->happy_lock);
2454         hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2455         hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
2456         spin_unlock_irq(&hp->happy_lock);
2457
2458         if (hp->sw_bmcr & BMCR_ANENABLE) {
2459                 cmd->base.autoneg = AUTONEG_ENABLE;
2460                 speed = ((hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
2461                          SPEED_100 : SPEED_10);
2462                 if (speed == SPEED_100)
2463                         cmd->base.duplex =
2464                                 (hp->sw_lpa & (LPA_100FULL)) ?
2465                                 DUPLEX_FULL : DUPLEX_HALF;
2466                 else
2467                         cmd->base.duplex =
2468                                 (hp->sw_lpa & (LPA_10FULL)) ?
2469                                 DUPLEX_FULL : DUPLEX_HALF;
2470         } else {
2471                 cmd->base.autoneg = AUTONEG_DISABLE;
2472                 speed = (hp->sw_bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
2473                 cmd->base.duplex =
2474                         (hp->sw_bmcr & BMCR_FULLDPLX) ?
2475                         DUPLEX_FULL : DUPLEX_HALF;
2476         }
2477         cmd->base.speed = speed;
2478         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2479                                                 supported);
2480
2481         return 0;
2482 }
2483
2484 static int hme_set_link_ksettings(struct net_device *dev,
2485                                   const struct ethtool_link_ksettings *cmd)
2486 {
2487         struct happy_meal *hp = netdev_priv(dev);
2488
2489         /* Verify the settings we care about. */
2490         if (cmd->base.autoneg != AUTONEG_ENABLE &&
2491             cmd->base.autoneg != AUTONEG_DISABLE)
2492                 return -EINVAL;
2493         if (cmd->base.autoneg == AUTONEG_DISABLE &&
2494             ((cmd->base.speed != SPEED_100 &&
2495               cmd->base.speed != SPEED_10) ||
2496              (cmd->base.duplex != DUPLEX_HALF &&
2497               cmd->base.duplex != DUPLEX_FULL)))
2498                 return -EINVAL;
2499
2500         /* Ok, do it to it. */
2501         spin_lock_irq(&hp->happy_lock);
2502         del_timer(&hp->happy_timer);
2503         happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
2504         spin_unlock_irq(&hp->happy_lock);
2505
2506         return 0;
2507 }
2508
2509 static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2510 {
2511         struct happy_meal *hp = netdev_priv(dev);
2512
2513         strlcpy(info->driver, "sunhme", sizeof(info->driver));
2514         strlcpy(info->version, "2.02", sizeof(info->version));
2515         if (hp->happy_flags & HFLAG_PCI) {
2516                 struct pci_dev *pdev = hp->happy_dev;
2517                 strlcpy(info->bus_info, pci_name(pdev), sizeof(info->bus_info));
2518         }
2519 #ifdef CONFIG_SBUS
2520         else {
2521                 const struct linux_prom_registers *regs;
2522                 struct platform_device *op = hp->happy_dev;
2523                 regs = of_get_property(op->dev.of_node, "regs", NULL);
2524                 if (regs)
2525                         snprintf(info->bus_info, sizeof(info->bus_info),
2526                                 "SBUS:%d",
2527                                 regs->which_io);
2528         }
2529 #endif
2530 }
2531
2532 static u32 hme_get_link(struct net_device *dev)
2533 {
2534         struct happy_meal *hp = netdev_priv(dev);
2535
2536         spin_lock_irq(&hp->happy_lock);
2537         hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
2538         spin_unlock_irq(&hp->happy_lock);
2539
2540         return hp->sw_bmsr & BMSR_LSTATUS;
2541 }
2542
2543 static const struct ethtool_ops hme_ethtool_ops = {
2544         .get_drvinfo            = hme_get_drvinfo,
2545         .get_link               = hme_get_link,
2546         .get_link_ksettings     = hme_get_link_ksettings,
2547         .set_link_ksettings     = hme_set_link_ksettings,
2548 };
2549
2550 static int hme_version_printed;
2551
2552 #ifdef CONFIG_SBUS
2553 /* Given a happy meal sbus device, find it's quattro parent.
2554  * If none exist, allocate and return a new one.
2555  *
2556  * Return NULL on failure.
2557  */
2558 static struct quattro *quattro_sbus_find(struct platform_device *child)
2559 {
2560         struct device *parent = child->dev.parent;
2561         struct platform_device *op;
2562         struct quattro *qp;
2563
2564         op = to_platform_device(parent);
2565         qp = platform_get_drvdata(op);
2566         if (qp)
2567                 return qp;
2568
2569         qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2570         if (qp != NULL) {
2571                 int i;
2572
2573                 for (i = 0; i < 4; i++)
2574                         qp->happy_meals[i] = NULL;
2575
2576                 qp->quattro_dev = child;
2577                 qp->next = qfe_sbus_list;
2578                 qfe_sbus_list = qp;
2579
2580                 platform_set_drvdata(op, qp);
2581         }
2582         return qp;
2583 }
2584
2585 /* After all quattro cards have been probed, we call these functions
2586  * to register the IRQ handlers for the cards that have been
2587  * successfully probed and skip the cards that failed to initialize
2588  */
2589 static int __init quattro_sbus_register_irqs(void)
2590 {
2591         struct quattro *qp;
2592
2593         for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2594                 struct platform_device *op = qp->quattro_dev;
2595                 int err, qfe_slot, skip = 0;
2596
2597                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2598                         if (!qp->happy_meals[qfe_slot])
2599                                 skip = 1;
2600                 }
2601                 if (skip)
2602                         continue;
2603
2604                 err = request_irq(op->archdata.irqs[0],
2605                                   quattro_sbus_interrupt,
2606                                   IRQF_SHARED, "Quattro",
2607                                   qp);
2608                 if (err != 0) {
2609                         printk(KERN_ERR "Quattro HME: IRQ registration "
2610                                "error %d.\n", err);
2611                         return err;
2612                 }
2613         }
2614
2615         return 0;
2616 }
2617
2618 static void quattro_sbus_free_irqs(void)
2619 {
2620         struct quattro *qp;
2621
2622         for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
2623                 struct platform_device *op = qp->quattro_dev;
2624                 int qfe_slot, skip = 0;
2625
2626                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
2627                         if (!qp->happy_meals[qfe_slot])
2628                                 skip = 1;
2629                 }
2630                 if (skip)
2631                         continue;
2632
2633                 free_irq(op->archdata.irqs[0], qp);
2634         }
2635 }
2636 #endif /* CONFIG_SBUS */
2637
2638 #ifdef CONFIG_PCI
2639 static struct quattro *quattro_pci_find(struct pci_dev *pdev)
2640 {
2641         struct pci_dev *bdev = pdev->bus->self;
2642         struct quattro *qp;
2643
2644         if (!bdev) return NULL;
2645         for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
2646                 struct pci_dev *qpdev = qp->quattro_dev;
2647
2648                 if (qpdev == bdev)
2649                         return qp;
2650         }
2651         qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
2652         if (qp != NULL) {
2653                 int i;
2654
2655                 for (i = 0; i < 4; i++)
2656                         qp->happy_meals[i] = NULL;
2657
2658                 qp->quattro_dev = bdev;
2659                 qp->next = qfe_pci_list;
2660                 qfe_pci_list = qp;
2661
2662                 /* No range tricks necessary on PCI. */
2663                 qp->nranges = 0;
2664         }
2665         return qp;
2666 }
2667 #endif /* CONFIG_PCI */
2668
2669 static const struct net_device_ops hme_netdev_ops = {
2670         .ndo_open               = happy_meal_open,
2671         .ndo_stop               = happy_meal_close,
2672         .ndo_start_xmit         = happy_meal_start_xmit,
2673         .ndo_tx_timeout         = happy_meal_tx_timeout,
2674         .ndo_get_stats          = happy_meal_get_stats,
2675         .ndo_set_rx_mode        = happy_meal_set_multicast,
2676         .ndo_set_mac_address    = eth_mac_addr,
2677         .ndo_validate_addr      = eth_validate_addr,
2678 };
2679
2680 #ifdef CONFIG_SBUS
2681 static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
2682 {
2683         struct device_node *dp = op->dev.of_node, *sbus_dp;
2684         struct quattro *qp = NULL;
2685         struct happy_meal *hp;
2686         struct net_device *dev;
2687         int i, qfe_slot = -1;
2688         int err = -ENODEV;
2689
2690         sbus_dp = op->dev.parent->of_node;
2691
2692         /* We can match PCI devices too, do not accept those here. */
2693         if (!of_node_name_eq(sbus_dp, "sbus") && !of_node_name_eq(sbus_dp, "sbi"))
2694                 return err;
2695
2696         if (is_qfe) {
2697                 qp = quattro_sbus_find(op);
2698                 if (qp == NULL)
2699                         goto err_out;
2700                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
2701                         if (qp->happy_meals[qfe_slot] == NULL)
2702                                 break;
2703                 if (qfe_slot == 4)
2704                         goto err_out;
2705         }
2706
2707         err = -ENOMEM;
2708         dev = alloc_etherdev(sizeof(struct happy_meal));
2709         if (!dev)
2710                 goto err_out;
2711         SET_NETDEV_DEV(dev, &op->dev);
2712
2713         if (hme_version_printed++ == 0)
2714                 printk(KERN_INFO "%s", version);
2715
2716         /* If user did not specify a MAC address specifically, use
2717          * the Quattro local-mac-address property...
2718          */
2719         for (i = 0; i < 6; i++) {
2720                 if (macaddr[i] != 0)
2721                         break;
2722         }
2723         if (i < 6) { /* a mac address was given */
2724                 for (i = 0; i < 6; i++)
2725                         dev->dev_addr[i] = macaddr[i];
2726                 macaddr[5]++;
2727         } else {
2728                 const unsigned char *addr;
2729                 int len;
2730
2731                 addr = of_get_property(dp, "local-mac-address", &len);
2732
2733                 if (qfe_slot != -1 && addr && len == ETH_ALEN)
2734                         memcpy(dev->dev_addr, addr, ETH_ALEN);
2735                 else
2736                         memcpy(dev->dev_addr, idprom->id_ethaddr, ETH_ALEN);
2737         }
2738
2739         hp = netdev_priv(dev);
2740
2741         hp->happy_dev = op;
2742         hp->dma_dev = &op->dev;
2743
2744         spin_lock_init(&hp->happy_lock);
2745
2746         err = -ENODEV;
2747         if (qp != NULL) {
2748                 hp->qfe_parent = qp;
2749                 hp->qfe_ent = qfe_slot;
2750                 qp->happy_meals[qfe_slot] = dev;
2751         }
2752
2753         hp->gregs = of_ioremap(&op->resource[0], 0,
2754                                GREG_REG_SIZE, "HME Global Regs");
2755         if (!hp->gregs) {
2756                 printk(KERN_ERR "happymeal: Cannot map global registers.\n");
2757                 goto err_out_free_netdev;
2758         }
2759
2760         hp->etxregs = of_ioremap(&op->resource[1], 0,
2761                                  ETX_REG_SIZE, "HME TX Regs");
2762         if (!hp->etxregs) {
2763                 printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
2764                 goto err_out_iounmap;
2765         }
2766
2767         hp->erxregs = of_ioremap(&op->resource[2], 0,
2768                                  ERX_REG_SIZE, "HME RX Regs");
2769         if (!hp->erxregs) {
2770                 printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
2771                 goto err_out_iounmap;
2772         }
2773
2774         hp->bigmacregs = of_ioremap(&op->resource[3], 0,
2775                                     BMAC_REG_SIZE, "HME BIGMAC Regs");
2776         if (!hp->bigmacregs) {
2777                 printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
2778                 goto err_out_iounmap;
2779         }
2780
2781         hp->tcvregs = of_ioremap(&op->resource[4], 0,
2782                                  TCVR_REG_SIZE, "HME Tranceiver Regs");
2783         if (!hp->tcvregs) {
2784                 printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
2785                 goto err_out_iounmap;
2786         }
2787
2788         hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
2789         if (hp->hm_revision == 0xff)
2790                 hp->hm_revision = 0xa0;
2791
2792         /* Now enable the feature flags we can. */
2793         if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
2794                 hp->happy_flags = HFLAG_20_21;
2795         else if (hp->hm_revision != 0xa0)
2796                 hp->happy_flags = HFLAG_NOT_A0;
2797
2798         if (qp != NULL)
2799                 hp->happy_flags |= HFLAG_QUATTRO;
2800
2801         /* Get the supported DVMA burst sizes from our Happy SBUS. */
2802         hp->happy_bursts = of_getintprop_default(sbus_dp,
2803                                                  "burst-sizes", 0x00);
2804
2805         hp->happy_block = dma_alloc_coherent(hp->dma_dev,
2806                                              PAGE_SIZE,
2807                                              &hp->hblock_dvma,
2808                                              GFP_ATOMIC);
2809         err = -ENOMEM;
2810         if (!hp->happy_block)
2811                 goto err_out_iounmap;
2812
2813         /* Force check of the link first time we are brought up. */
2814         hp->linkcheck = 0;
2815
2816         /* Force timer state to 'asleep' with count of zero. */
2817         hp->timer_state = asleep;
2818         hp->timer_ticks = 0;
2819
2820         timer_setup(&hp->happy_timer, happy_meal_timer, 0);
2821
2822         hp->dev = dev;
2823         dev->netdev_ops = &hme_netdev_ops;
2824         dev->watchdog_timeo = 5*HZ;
2825         dev->ethtool_ops = &hme_ethtool_ops;
2826
2827         /* Happy Meal can do it all... */
2828         dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
2829         dev->features |= dev->hw_features | NETIF_F_RXCSUM;
2830
2831         hp->irq = op->archdata.irqs[0];
2832
2833 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
2834         /* Hook up SBUS register/descriptor accessors. */
2835         hp->read_desc32 = sbus_hme_read_desc32;
2836         hp->write_txd = sbus_hme_write_txd;
2837         hp->write_rxd = sbus_hme_write_rxd;
2838         hp->read32 = sbus_hme_read32;
2839         hp->write32 = sbus_hme_write32;
2840 #endif
2841
2842         /* Grrr, Happy Meal comes up by default not advertising
2843          * full duplex 100baseT capabilities, fix this.
2844          */
2845         spin_lock_irq(&hp->happy_lock);
2846         happy_meal_set_initial_advertisement(hp);
2847         spin_unlock_irq(&hp->happy_lock);
2848
2849         err = register_netdev(hp->dev);
2850         if (err) {
2851                 printk(KERN_ERR "happymeal: Cannot register net device, "
2852                        "aborting.\n");
2853                 goto err_out_free_coherent;
2854         }
2855
2856         platform_set_drvdata(op, hp);
2857
2858         if (qfe_slot != -1)
2859                 printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
2860                        dev->name, qfe_slot);
2861         else
2862                 printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
2863                        dev->name);
2864
2865         printk("%pM\n", dev->dev_addr);
2866
2867         return 0;
2868
2869 err_out_free_coherent:
2870         dma_free_coherent(hp->dma_dev,
2871                           PAGE_SIZE,
2872                           hp->happy_block,
2873                           hp->hblock_dvma);
2874
2875 err_out_iounmap:
2876         if (hp->gregs)
2877                 of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
2878         if (hp->etxregs)
2879                 of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
2880         if (hp->erxregs)
2881                 of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
2882         if (hp->bigmacregs)
2883                 of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
2884         if (hp->tcvregs)
2885                 of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
2886
2887         if (qp)
2888                 qp->happy_meals[qfe_slot] = NULL;
2889
2890 err_out_free_netdev:
2891         free_netdev(dev);
2892
2893 err_out:
2894         return err;
2895 }
2896 #endif
2897
2898 #ifdef CONFIG_PCI
2899 #ifndef CONFIG_SPARC
2900 static int is_quattro_p(struct pci_dev *pdev)
2901 {
2902         struct pci_dev *busdev = pdev->bus->self;
2903         struct pci_dev *this_pdev;
2904         int n_hmes;
2905
2906         if (busdev == NULL ||
2907             busdev->vendor != PCI_VENDOR_ID_DEC ||
2908             busdev->device != PCI_DEVICE_ID_DEC_21153)
2909                 return 0;
2910
2911         n_hmes = 0;
2912         list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
2913                 if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
2914                     this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
2915                         n_hmes++;
2916         }
2917
2918         if (n_hmes != 4)
2919                 return 0;
2920
2921         return 1;
2922 }
2923
2924 /* Fetch MAC address from vital product data of PCI ROM. */
2925 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
2926 {
2927         int this_offset;
2928
2929         for (this_offset = 0x20; this_offset < len; this_offset++) {
2930                 void __iomem *p = rom_base + this_offset;
2931
2932                 if (readb(p + 0) != 0x90 ||
2933                     readb(p + 1) != 0x00 ||
2934                     readb(p + 2) != 0x09 ||
2935                     readb(p + 3) != 0x4e ||
2936                     readb(p + 4) != 0x41 ||
2937                     readb(p + 5) != 0x06)
2938                         continue;
2939
2940                 this_offset += 6;
2941                 p += 6;
2942
2943                 if (index == 0) {
2944                         int i;
2945
2946                         for (i = 0; i < 6; i++)
2947                                 dev_addr[i] = readb(p + i);
2948                         return 1;
2949                 }
2950                 index--;
2951         }
2952         return 0;
2953 }
2954
2955 static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
2956 {
2957         size_t size;
2958         void __iomem *p = pci_map_rom(pdev, &size);
2959
2960         if (p) {
2961                 int index = 0;
2962                 int found;
2963
2964                 if (is_quattro_p(pdev))
2965                         index = PCI_SLOT(pdev->devfn);
2966
2967                 found = readb(p) == 0x55 &&
2968                         readb(p + 1) == 0xaa &&
2969                         find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
2970                 pci_unmap_rom(pdev, p);
2971                 if (found)
2972                         return;
2973         }
2974
2975         /* Sun MAC prefix then 3 random bytes. */
2976         dev_addr[0] = 0x08;
2977         dev_addr[1] = 0x00;
2978         dev_addr[2] = 0x20;
2979         get_random_bytes(&dev_addr[3], 3);
2980 }
2981 #endif /* !(CONFIG_SPARC) */
2982
2983 static int happy_meal_pci_probe(struct pci_dev *pdev,
2984                                 const struct pci_device_id *ent)
2985 {
2986         struct quattro *qp = NULL;
2987 #ifdef CONFIG_SPARC
2988         struct device_node *dp;
2989 #endif
2990         struct happy_meal *hp;
2991         struct net_device *dev;
2992         void __iomem *hpreg_base;
2993         unsigned long hpreg_res;
2994         int i, qfe_slot = -1;
2995         char prom_name[64];
2996         int err;
2997
2998         /* Now make sure pci_dev cookie is there. */
2999 #ifdef CONFIG_SPARC
3000         dp = pci_device_to_OF_node(pdev);
3001         snprintf(prom_name, sizeof(prom_name), "%pOFn", dp);
3002 #else
3003         if (is_quattro_p(pdev))
3004                 strcpy(prom_name, "SUNW,qfe");
3005         else
3006                 strcpy(prom_name, "SUNW,hme");
3007 #endif
3008
3009         err = -ENODEV;
3010
3011         if (pci_enable_device(pdev))
3012                 goto err_out;
3013         pci_set_master(pdev);
3014
3015         if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
3016                 qp = quattro_pci_find(pdev);
3017                 if (qp == NULL)
3018                         goto err_out;
3019                 for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
3020                         if (qp->happy_meals[qfe_slot] == NULL)
3021                                 break;
3022                 if (qfe_slot == 4)
3023                         goto err_out;
3024         }
3025
3026         dev = alloc_etherdev(sizeof(struct happy_meal));
3027         err = -ENOMEM;
3028         if (!dev)
3029                 goto err_out;
3030         SET_NETDEV_DEV(dev, &pdev->dev);
3031
3032         if (hme_version_printed++ == 0)
3033                 printk(KERN_INFO "%s", version);
3034
3035         hp = netdev_priv(dev);
3036
3037         hp->happy_dev = pdev;
3038         hp->dma_dev = &pdev->dev;
3039
3040         spin_lock_init(&hp->happy_lock);
3041
3042         if (qp != NULL) {
3043                 hp->qfe_parent = qp;
3044                 hp->qfe_ent = qfe_slot;
3045                 qp->happy_meals[qfe_slot] = dev;
3046         }
3047
3048         hpreg_res = pci_resource_start(pdev, 0);
3049         err = -ENODEV;
3050         if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
3051                 printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
3052                 goto err_out_clear_quattro;
3053         }
3054         if (pci_request_regions(pdev, DRV_NAME)) {
3055                 printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
3056                        "aborting.\n");
3057                 goto err_out_clear_quattro;
3058         }
3059
3060         if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
3061                 printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
3062                 goto err_out_free_res;
3063         }
3064
3065         for (i = 0; i < 6; i++) {
3066                 if (macaddr[i] != 0)
3067                         break;
3068         }
3069         if (i < 6) { /* a mac address was given */
3070                 for (i = 0; i < 6; i++)
3071                         dev->dev_addr[i] = macaddr[i];
3072                 macaddr[5]++;
3073         } else {
3074 #ifdef CONFIG_SPARC
3075                 const unsigned char *addr;
3076                 int len;
3077
3078                 if (qfe_slot != -1 &&
3079                     (addr = of_get_property(dp, "local-mac-address", &len))
3080                         != NULL &&
3081                     len == 6) {
3082                         memcpy(dev->dev_addr, addr, ETH_ALEN);
3083                 } else {
3084                         memcpy(dev->dev_addr, idprom->id_ethaddr, ETH_ALEN);
3085                 }
3086 #else
3087                 get_hme_mac_nonsparc(pdev, &dev->dev_addr[0]);
3088 #endif
3089         }
3090
3091         /* Layout registers. */
3092         hp->gregs      = (hpreg_base + 0x0000UL);
3093         hp->etxregs    = (hpreg_base + 0x2000UL);
3094         hp->erxregs    = (hpreg_base + 0x4000UL);
3095         hp->bigmacregs = (hpreg_base + 0x6000UL);
3096         hp->tcvregs    = (hpreg_base + 0x7000UL);
3097
3098 #ifdef CONFIG_SPARC
3099         hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
3100         if (hp->hm_revision == 0xff)
3101                 hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
3102 #else
3103         /* works with this on non-sparc hosts */
3104         hp->hm_revision = 0x20;
3105 #endif
3106
3107         /* Now enable the feature flags we can. */
3108         if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
3109                 hp->happy_flags = HFLAG_20_21;
3110         else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
3111                 hp->happy_flags = HFLAG_NOT_A0;
3112
3113         if (qp != NULL)
3114                 hp->happy_flags |= HFLAG_QUATTRO;
3115
3116         /* And of course, indicate this is PCI. */
3117         hp->happy_flags |= HFLAG_PCI;
3118
3119 #ifdef CONFIG_SPARC
3120         /* Assume PCI happy meals can handle all burst sizes. */
3121         hp->happy_bursts = DMA_BURSTBITS;
3122 #endif
3123
3124         hp->happy_block = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
3125                                              &hp->hblock_dvma, GFP_KERNEL);
3126         err = -ENODEV;
3127         if (!hp->happy_block)
3128                 goto err_out_iounmap;
3129
3130         hp->linkcheck = 0;
3131         hp->timer_state = asleep;
3132         hp->timer_ticks = 0;
3133
3134         timer_setup(&hp->happy_timer, happy_meal_timer, 0);
3135
3136         hp->irq = pdev->irq;
3137         hp->dev = dev;
3138         dev->netdev_ops = &hme_netdev_ops;
3139         dev->watchdog_timeo = 5*HZ;
3140         dev->ethtool_ops = &hme_ethtool_ops;
3141
3142         /* Happy Meal can do it all... */
3143         dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
3144         dev->features |= dev->hw_features | NETIF_F_RXCSUM;
3145
3146 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
3147         /* Hook up PCI register/descriptor accessors. */
3148         hp->read_desc32 = pci_hme_read_desc32;
3149         hp->write_txd = pci_hme_write_txd;
3150         hp->write_rxd = pci_hme_write_rxd;
3151         hp->read32 = pci_hme_read32;
3152         hp->write32 = pci_hme_write32;
3153 #endif
3154
3155         /* Grrr, Happy Meal comes up by default not advertising
3156          * full duplex 100baseT capabilities, fix this.
3157          */
3158         spin_lock_irq(&hp->happy_lock);
3159         happy_meal_set_initial_advertisement(hp);
3160         spin_unlock_irq(&hp->happy_lock);
3161
3162         err = register_netdev(hp->dev);
3163         if (err) {
3164                 printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
3165                        "aborting.\n");
3166                 goto err_out_iounmap;
3167         }
3168
3169         pci_set_drvdata(pdev, hp);
3170
3171         if (!qfe_slot) {
3172                 struct pci_dev *qpdev = qp->quattro_dev;
3173
3174                 prom_name[0] = 0;
3175                 if (!strncmp(dev->name, "eth", 3)) {
3176                         int i = simple_strtoul(dev->name + 3, NULL, 10);
3177                         sprintf(prom_name, "-%d", i + 3);
3178                 }
3179                 printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
3180                 if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
3181                     qpdev->device == PCI_DEVICE_ID_DEC_21153)
3182                         printk("DEC 21153 PCI Bridge\n");
3183                 else
3184                         printk("unknown bridge %04x.%04x\n",
3185                                 qpdev->vendor, qpdev->device);
3186         }
3187
3188         if (qfe_slot != -1)
3189                 printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
3190                        dev->name, qfe_slot);
3191         else
3192                 printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
3193                        dev->name);
3194
3195         printk("%pM\n", dev->dev_addr);
3196
3197         return 0;
3198
3199 err_out_iounmap:
3200         iounmap(hp->gregs);
3201
3202 err_out_free_res:
3203         pci_release_regions(pdev);
3204
3205 err_out_clear_quattro:
3206         if (qp != NULL)
3207                 qp->happy_meals[qfe_slot] = NULL;
3208
3209         free_netdev(dev);
3210
3211 err_out:
3212         return err;
3213 }
3214
3215 static void happy_meal_pci_remove(struct pci_dev *pdev)
3216 {
3217         struct happy_meal *hp = pci_get_drvdata(pdev);
3218         struct net_device *net_dev = hp->dev;
3219
3220         unregister_netdev(net_dev);
3221
3222         dma_free_coherent(hp->dma_dev, PAGE_SIZE,
3223                           hp->happy_block, hp->hblock_dvma);
3224         iounmap(hp->gregs);
3225         pci_release_regions(hp->happy_dev);
3226
3227         free_netdev(net_dev);
3228 }
3229
3230 static const struct pci_device_id happymeal_pci_ids[] = {
3231         { PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
3232         { }                     /* Terminating entry */
3233 };
3234
3235 MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
3236
3237 static struct pci_driver hme_pci_driver = {
3238         .name           = "hme",
3239         .id_table       = happymeal_pci_ids,
3240         .probe          = happy_meal_pci_probe,
3241         .remove         = happy_meal_pci_remove,
3242 };
3243
3244 static int __init happy_meal_pci_init(void)
3245 {
3246         return pci_register_driver(&hme_pci_driver);
3247 }
3248
3249 static void happy_meal_pci_exit(void)
3250 {
3251         pci_unregister_driver(&hme_pci_driver);
3252
3253         while (qfe_pci_list) {
3254                 struct quattro *qfe = qfe_pci_list;
3255                 struct quattro *next = qfe->next;
3256
3257                 kfree(qfe);
3258
3259                 qfe_pci_list = next;
3260         }
3261 }
3262
3263 #endif
3264
3265 #ifdef CONFIG_SBUS
3266 static const struct of_device_id hme_sbus_match[];
3267 static int hme_sbus_probe(struct platform_device *op)
3268 {
3269         const struct of_device_id *match;
3270         struct device_node *dp = op->dev.of_node;
3271         const char *model = of_get_property(dp, "model", NULL);
3272         int is_qfe;
3273
3274         match = of_match_device(hme_sbus_match, &op->dev);
3275         if (!match)
3276                 return -EINVAL;
3277         is_qfe = (match->data != NULL);
3278
3279         if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
3280                 is_qfe = 1;
3281
3282         return happy_meal_sbus_probe_one(op, is_qfe);
3283 }
3284
3285 static int hme_sbus_remove(struct platform_device *op)
3286 {
3287         struct happy_meal *hp = platform_get_drvdata(op);
3288         struct net_device *net_dev = hp->dev;
3289
3290         unregister_netdev(net_dev);
3291
3292         /* XXX qfe parent interrupt... */
3293
3294         of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
3295         of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
3296         of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
3297         of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
3298         of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
3299         dma_free_coherent(hp->dma_dev,
3300                           PAGE_SIZE,
3301                           hp->happy_block,
3302                           hp->hblock_dvma);
3303
3304         free_netdev(net_dev);
3305
3306         return 0;
3307 }
3308
3309 static const struct of_device_id hme_sbus_match[] = {
3310         {
3311                 .name = "SUNW,hme",
3312         },
3313         {
3314                 .name = "SUNW,qfe",
3315                 .data = (void *) 1,
3316         },
3317         {
3318                 .name = "qfe",
3319                 .data = (void *) 1,
3320         },
3321         {},
3322 };
3323
3324 MODULE_DEVICE_TABLE(of, hme_sbus_match);
3325
3326 static struct platform_driver hme_sbus_driver = {
3327         .driver = {
3328                 .name = "hme",
3329                 .of_match_table = hme_sbus_match,
3330         },
3331         .probe          = hme_sbus_probe,
3332         .remove         = hme_sbus_remove,
3333 };
3334
3335 static int __init happy_meal_sbus_init(void)
3336 {
3337         int err;
3338
3339         err = platform_driver_register(&hme_sbus_driver);
3340         if (!err)
3341                 err = quattro_sbus_register_irqs();
3342
3343         return err;
3344 }
3345
3346 static void happy_meal_sbus_exit(void)
3347 {
3348         platform_driver_unregister(&hme_sbus_driver);
3349         quattro_sbus_free_irqs();
3350
3351         while (qfe_sbus_list) {
3352                 struct quattro *qfe = qfe_sbus_list;
3353                 struct quattro *next = qfe->next;
3354
3355                 kfree(qfe);
3356
3357                 qfe_sbus_list = next;
3358         }
3359 }
3360 #endif
3361
3362 static int __init happy_meal_probe(void)
3363 {
3364         int err = 0;
3365
3366 #ifdef CONFIG_SBUS
3367         err = happy_meal_sbus_init();
3368 #endif
3369 #ifdef CONFIG_PCI
3370         if (!err) {
3371                 err = happy_meal_pci_init();
3372 #ifdef CONFIG_SBUS
3373                 if (err)
3374                         happy_meal_sbus_exit();
3375 #endif
3376         }
3377 #endif
3378
3379         return err;
3380 }
3381
3382
3383 static void __exit happy_meal_exit(void)
3384 {
3385 #ifdef CONFIG_SBUS
3386         happy_meal_sbus_exit();
3387 #endif
3388 #ifdef CONFIG_PCI
3389         happy_meal_pci_exit();
3390 #endif
3391 }
3392
3393 module_init(happy_meal_probe);
3394 module_exit(happy_meal_exit);