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 // SPDX-License-Identifier: GPL-2.0
 /* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
  *           auto carrier detecting ethernet driver.  Also known as the
  *           "Happy Meal Ethernet" found on SunSwift SBUS cards.
  *
  * Copyright (C) 1996, 1998, 1999, 2002, 2003,
  *      2006, 2008 David S. Miller (davem@davemloft.net)
  *
  * Changes :
  * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
  *   - port to non-sparc architectures. Tested only on x86 and
  *     only currently works with QFE PCI cards.
  *   - ability to specify the MAC address at module load time by passing this
  *     argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
  */
 
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/fcntl.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/in.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/ethtool.h>
 #include <linux/mii.h>
 #include <linux/crc32.h>
 #include <linux/random.h>
 #include <linux/errno.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/mm.h>
 #include <linux/bitops.h>
 #include <linux/dma-mapping.h>
 
 #include <asm/io.h>
 #include <asm/dma.h>
 #include <asm/byteorder.h>
 
 #ifdef CONFIG_SPARC
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <asm/idprom.h>
 #include <asm/openprom.h>
 #include <asm/oplib.h>
 #include <asm/prom.h>
 #include <asm/auxio.h>
 #endif
 #include <linux/uaccess.h>
 
 #include <asm/irq.h>
 
 #ifdef CONFIG_PCI
 #include <linux/pci.h>
 #endif
 
 #include "sunhme.h"
 
 #define DRV_NAME    "sunhme"
 #define DRV_VERSION "3.10"
 #define DRV_RELDATE "August 26, 2008"
 #define DRV_AUTHOR  "David S. Miller (davem@davemloft.net)"
 
 static char version[] =
     DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
 
 MODULE_VERSION(DRV_VERSION);
 MODULE_AUTHOR(DRV_AUTHOR);
 MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
 MODULE_LICENSE("GPL");
 
 static int macaddr[6];
 
 /* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
 module_param_array(macaddr, int, NULL, 0);
 MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
 
 #ifdef CONFIG_SBUS
 static struct quattro *qfe_sbus_list;
 #endif
 
 #ifdef CONFIG_PCI
 static struct quattro *qfe_pci_list;
 #endif
 
 #undef HMEDEBUG
 #undef SXDEBUG
 #undef RXDEBUG
 #undef TXDEBUG
 #undef TXLOGGING
 
 #ifdef TXLOGGING
 struct hme_tx_logent {
     unsigned int tstamp;
     int tx_new, tx_old;
     unsigned int action;
 #define TXLOG_ACTION_IRQ    0x01
 #define TXLOG_ACTION_TXMIT  0x02
 #define TXLOG_ACTION_TBUSY  0x04
 #define TXLOG_ACTION_NBUFS  0x08
     unsigned int status;
 };
 #define TX_LOG_LEN  128
 static struct hme_tx_logent tx_log[TX_LOG_LEN];
 static int txlog_cur_entry;
 static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
 {
     struct hme_tx_logent *tlp;
     unsigned long flags;
 
     local_irq_save(flags);
     tlp = &tx_log[txlog_cur_entry];
     tlp->tstamp = (unsigned int)jiffies;
     tlp->tx_new = hp->tx_new;
     tlp->tx_old = hp->tx_old;
     tlp->action = a;
     tlp->status = s;
     txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
     local_irq_restore(flags);
 }
 static __inline__ void tx_dump_log(void)
 {
     int i, this;
 
     this = txlog_cur_entry;
     for (i = 0; i < TX_LOG_LEN; i++) {
         printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
                tx_log[this].tstamp,
                tx_log[this].tx_new, tx_log[this].tx_old,
                tx_log[this].action, tx_log[this].status);
         this = (this + 1) & (TX_LOG_LEN - 1);
     }
 }
 static __inline__ void tx_dump_ring(struct happy_meal *hp)
 {
     struct hmeal_init_block *hb = hp->happy_block;
     struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
     int i;
 
     for (i = 0; i < TX_RING_SIZE; i+=4) {
         printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
                i, i + 4,
                le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
                le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
                le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
                le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
     }
 }
 #else
 #define tx_add_log(hp, a, s)        do { } while(0)
 #define tx_dump_log()           do { } while(0)
 #define tx_dump_ring(hp)        do { } while(0)
 #endif
 
 #ifdef HMEDEBUG
 #define HMD(x)  printk x
 #else
 #define HMD(x)
 #endif
 
 /* #define AUTO_SWITCH_DEBUG */
 
 #ifdef AUTO_SWITCH_DEBUG
 #define ASD(x)  printk x
 #else
 #define ASD(x)
 #endif
 
 #define DEFAULT_IPG0      16 /* For lance-mode only */
 #define DEFAULT_IPG1       8 /* For all modes */
 #define DEFAULT_IPG2       4 /* For all modes */
 #define DEFAULT_JAMSIZE    4 /* Toe jam */
 
 /* NOTE: In the descriptor writes one _must_ write the address
  *   member _first_.  The card must not be allowed to see
  *   the updated descriptor flags until the address is
  *   correct.  I've added a write memory barrier between
  *   the two stores so that I can sleep well at night... -DaveM
  */
 
 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
 static void sbus_hme_write32(void __iomem *reg, u32 val)
 {
     sbus_writel(val, reg);
 }
 
 static u32 sbus_hme_read32(void __iomem *reg)
 {
     return sbus_readl(reg);
 }
 
 static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
 {
     rxd->rx_addr = (__force hme32)addr;
     dma_wmb();
     rxd->rx_flags = (__force hme32)flags;
 }
 
 static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
 {
     txd->tx_addr = (__force hme32)addr;
     dma_wmb();
     txd->tx_flags = (__force hme32)flags;
 }
 
 static u32 sbus_hme_read_desc32(hme32 *p)
 {
     return (__force u32)*p;
 }
 
 static void pci_hme_write32(void __iomem *reg, u32 val)
 {
     writel(val, reg);
 }
 
 static u32 pci_hme_read32(void __iomem *reg)
 {
     return readl(reg);
 }
 
 static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
 {
     rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
     dma_wmb();
     rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
 }
 
 static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
 {
     txd->tx_addr = (__force hme32)cpu_to_le32(addr);
     dma_wmb();
     txd->tx_flags = (__force hme32)cpu_to_le32(flags);
 }
 
 static u32 pci_hme_read_desc32(hme32 *p)
 {
     return le32_to_cpup((__le32 *)p);
 }
 
 #define hme_write32(__hp, __reg, __val) \
     ((__hp)->write32((__reg), (__val)))
 #define hme_read32(__hp, __reg) \
     ((__hp)->read32(__reg))
 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
     ((__hp)->write_rxd((__rxd), (__flags), (__addr)))
 #define hme_write_txd(__hp, __txd, __flags, __addr) \
     ((__hp)->write_txd((__txd), (__flags), (__addr)))
 #define hme_read_desc32(__hp, __p) \
     ((__hp)->read_desc32(__p))
 #else
 #ifdef CONFIG_SBUS
 /* SBUS only compilation */
 #define hme_write32(__hp, __reg, __val) \
     sbus_writel((__val), (__reg))
 #define hme_read32(__hp, __reg) \
     sbus_readl(__reg)
 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
 do {    (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
     dma_wmb(); \
     (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
 } while(0)
 #define hme_write_txd(__hp, __txd, __flags, __addr) \
 do {    (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
     dma_wmb(); \
     (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
 } while(0)
 #define hme_read_desc32(__hp, __p)  ((__force u32)(hme32)*(__p))
 #else
 /* PCI only compilation */
 #define hme_write32(__hp, __reg, __val) \
     writel((__val), (__reg))
 #define hme_read32(__hp, __reg) \
     readl(__reg)
 #define hme_write_rxd(__hp, __rxd, __flags, __addr) \
 do {    (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
     dma_wmb(); \
     (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
 } while(0)
 #define hme_write_txd(__hp, __txd, __flags, __addr) \
 do {    (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
     dma_wmb(); \
     (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
 } while(0)
 static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
 {
     return le32_to_cpup((__le32 *)p);
 }
 #endif
 #endif
 
 
 /* Oh yes, the MIF BitBang is mighty fun to program.  BitBucket is more like it. */
 static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
 {
     hme_write32(hp, tregs + TCVR_BBDATA, bit);
     hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
     hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
 }
 
 #if 0
 static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
 {
     u32 ret;
 
     hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
     hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
     ret = hme_read32(hp, tregs + TCVR_CFG);
     if (internal)
         ret &= TCV_CFG_MDIO0;
     else
         ret &= TCV_CFG_MDIO1;
 
     return ret;
 }
 #endif
 
 static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
 {
     u32 retval;
 
     hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
     udelay(1);
     retval = hme_read32(hp, tregs + TCVR_CFG);
     if (internal)
         retval &= TCV_CFG_MDIO0;
     else
         retval &= TCV_CFG_MDIO1;
     hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
 
     return retval;
 }
 
 #define TCVR_FAILURE      0x80000000     /* Impossible MIF read value */
 
 static int happy_meal_bb_read(struct happy_meal *hp,
                   void __iomem *tregs, int reg)
 {
     u32 tmp;
     int retval = 0;
     int i;
 
     ASD(("happy_meal_bb_read: reg=%d ", reg));
 
     /* Enable the MIF BitBang outputs. */
     hme_write32(hp, tregs + TCVR_BBOENAB, 1);
 
     /* Force BitBang into the idle state. */
     for (i = 0; i < 32; i++)
         BB_PUT_BIT(hp, tregs, 1);
 
     /* Give it the read sequence. */
     BB_PUT_BIT(hp, tregs, 0);
     BB_PUT_BIT(hp, tregs, 1);
     BB_PUT_BIT(hp, tregs, 1);
     BB_PUT_BIT(hp, tregs, 0);
 
     /* Give it the PHY address. */
     tmp = hp->paddr & 0xff;
     for (i = 4; i >= 0; i--)
         BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 
     /* Tell it what register we want to read. */
     tmp = (reg & 0xff);
     for (i = 4; i >= 0; i--)
         BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 
     /* Close down the MIF BitBang outputs. */
     hme_write32(hp, tregs + TCVR_BBOENAB, 0);
 
     /* Now read in the value. */
     (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
     for (i = 15; i >= 0; i--)
         retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
     (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
     (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
     (void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
     ASD(("value=%x\n", retval));
     return retval;
 }
 
 static void happy_meal_bb_write(struct happy_meal *hp,
                 void __iomem *tregs, int reg,
                 unsigned short value)
 {
     u32 tmp;
     int i;
 
     ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));
 
     /* Enable the MIF BitBang outputs. */
     hme_write32(hp, tregs + TCVR_BBOENAB, 1);
 
     /* Force BitBang into the idle state. */
     for (i = 0; i < 32; i++)
         BB_PUT_BIT(hp, tregs, 1);
 
     /* Give it write sequence. */
     BB_PUT_BIT(hp, tregs, 0);
     BB_PUT_BIT(hp, tregs, 1);
     BB_PUT_BIT(hp, tregs, 0);
     BB_PUT_BIT(hp, tregs, 1);
 
     /* Give it the PHY address. */
     tmp = (hp->paddr & 0xff);
     for (i = 4; i >= 0; i--)
         BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 
     /* Tell it what register we will be writing. */
     tmp = (reg & 0xff);
     for (i = 4; i >= 0; i--)
         BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
 
     /* Tell it to become ready for the bits. */
     BB_PUT_BIT(hp, tregs, 1);
     BB_PUT_BIT(hp, tregs, 0);
 
     for (i = 15; i >= 0; i--)
         BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
 
     /* Close down the MIF BitBang outputs. */
     hme_write32(hp, tregs + TCVR_BBOENAB, 0);
 }
 
 #define TCVR_READ_TRIES   16
 
 static int happy_meal_tcvr_read(struct happy_meal *hp,
                 void __iomem *tregs, int reg)
 {
     int tries = TCVR_READ_TRIES;
     int retval;
 
     ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
     if (hp->tcvr_type == none) {
         ASD(("no transceiver, value=TCVR_FAILURE\n"));
         return TCVR_FAILURE;
     }
 
     if (!(hp->happy_flags & HFLAG_FENABLE)) {
         ASD(("doing bit bang\n"));
         return happy_meal_bb_read(hp, tregs, reg);
     }
 
     hme_write32(hp, tregs + TCVR_FRAME,
             (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
     while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
         udelay(20);
     if (!tries) {
         printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
         return TCVR_FAILURE;
     }
     retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
     ASD(("value=%04x\n", retval));
     return retval;
 }
 
 #define TCVR_WRITE_TRIES  16
 
 static void happy_meal_tcvr_write(struct happy_meal *hp,
                   void __iomem *tregs, int reg,
                   unsigned short value)
 {
     int tries = TCVR_WRITE_TRIES;
 
     ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));
 
     /* Welcome to Sun Microsystems, can I take your order please? */
     if (!(hp->happy_flags & HFLAG_FENABLE)) {
         happy_meal_bb_write(hp, tregs, reg, value);
         return;
     }
 
     /* Would you like fries with that? */
     hme_write32(hp, tregs + TCVR_FRAME,
             (FRAME_WRITE | (hp->paddr << 23) |
              ((reg & 0xff) << 18) | (value & 0xffff)));
     while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
         udelay(20);
 
     /* Anything else? */
     if (!tries)
         printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");
 
     /* Fifty-two cents is your change, have a nice day. */
 }
 
 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
  * that keeps watching the auto negotiation process as it progresses.
  * The DP83840 is first told to start doing it's thing, we set up the time
  * and place the timer state machine in it's initial state.
  *
  * Here the timer peeks at the DP83840 status registers at each click to see
  * if the auto negotiation has completed, we assume here that the DP83840 PHY
  * will time out at some point and just tell us what (didn't) happen.  For
  * complete coverage we only allow so many of the ticks at this level to run,
  * when this has expired we print a warning message and try another strategy.
  * This "other" strategy is to force the interface into various speed/duplex
  * configurations and we stop when we see a link-up condition before the
  * maximum number of "peek" ticks have occurred.
  *
  * Once a valid link status has been detected we configure the BigMAC and
  * the rest of the Happy Meal to speak the most efficient protocol we could
  * get a clean link for.  The priority for link configurations, highest first
  * is:
  *                 100 Base-T Full Duplex
  *                 100 Base-T Half Duplex
  *                 10 Base-T Full Duplex
  *                 10 Base-T Half Duplex
  *
  * We start a new timer now, after a successful auto negotiation status has
  * been detected.  This timer just waits for the link-up bit to get set in
  * the BMCR of the DP83840.  When this occurs we print a kernel log message
  * describing the link type in use and the fact that it is up.
  *
  * If a fatal error of some sort is signalled and detected in the interrupt
  * service routine, and the chip is reset, or the link is ifconfig'd down
  * and then back up, this entire process repeats itself all over again.
  */
 static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
 {
     hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 
     /* Downgrade from full to half duplex.  Only possible
      * via ethtool.
      */
     if (hp->sw_bmcr & BMCR_FULLDPLX) {
         hp->sw_bmcr &= ~(BMCR_FULLDPLX);
         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
         return 0;
     }
 
     /* Downgrade from 100 to 10. */
     if (hp->sw_bmcr & BMCR_SPEED100) {
         hp->sw_bmcr &= ~(BMCR_SPEED100);
         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
         return 0;
     }
 
     /* We've tried everything. */
     return -1;
 }
 
 static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
 {
     hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
 
     netdev_info(hp->dev,
             "Link is up using %s transceiver at %dMb/s, %s Duplex.\n",
             hp->tcvr_type == external ? "external" : "internal",
             hp->sw_lpa & (LPA_100HALF | LPA_100FULL) ? 100 : 10,
             hp->sw_lpa & (LPA_100FULL | LPA_10FULL) ? "Full" : "Half");
 }
 
 static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
 {
     hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
 
     netdev_info(hp->dev,
             "Link has been forced up using %s transceiver at %dMb/s, %s Duplex.\n",
             hp->tcvr_type == external ? "external" : "internal",
             hp->sw_bmcr & BMCR_SPEED100 ? 100 : 10,
             hp->sw_bmcr & BMCR_FULLDPLX ? "Full" : "Half");
 }
 
 static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
 {
     int full;
 
     /* All we care about is making sure the bigmac tx_cfg has a
      * proper duplex setting.
      */
     if (hp->timer_state == arbwait) {
         hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
         if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
             goto no_response;
         if (hp->sw_lpa & LPA_100FULL)
             full = 1;
         else if (hp->sw_lpa & LPA_100HALF)
             full = 0;
         else if (hp->sw_lpa & LPA_10FULL)
             full = 1;
         else
             full = 0;
     } else {
         /* Forcing a link mode. */
         hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
         if (hp->sw_bmcr & BMCR_FULLDPLX)
             full = 1;
         else
             full = 0;
     }
 
     /* Before changing other bits in the tx_cfg register, and in
      * general any of other the TX config registers too, you
      * must:
      * 1) Clear Enable
      * 2) Poll with reads until that bit reads back as zero
      * 3) Make TX configuration changes
      * 4) Set Enable once more
      */
     hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
             ~(BIGMAC_TXCFG_ENABLE));
     while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
         barrier();
     if (full) {
         hp->happy_flags |= HFLAG_FULL;
         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
                 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
                 BIGMAC_TXCFG_FULLDPLX);
     } else {
         hp->happy_flags &= ~(HFLAG_FULL);
         hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
                 hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
                 ~(BIGMAC_TXCFG_FULLDPLX));
     }
     hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
             hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
             BIGMAC_TXCFG_ENABLE);
     return 0;
 no_response:
     return 1;
 }
 
 static int happy_meal_init(struct happy_meal *hp);
 
 static int is_lucent_phy(struct happy_meal *hp)
 {
     void __iomem *tregs = hp->tcvregs;
     unsigned short mr2, mr3;
     int ret = 0;
 
     mr2 = happy_meal_tcvr_read(hp, tregs, 2);
     mr3 = happy_meal_tcvr_read(hp, tregs, 3);
     if ((mr2 & 0xffff) == 0x0180 &&
         ((mr3 & 0xffff) >> 10) == 0x1d)
         ret = 1;
 
     return ret;
 }
 
 static void happy_meal_timer(struct timer_list *t)
 {
     struct happy_meal *hp = from_timer(hp, t, happy_timer);
     void __iomem *tregs = hp->tcvregs;
     int restart_timer = 0;
 
     spin_lock_irq(&hp->happy_lock);
 
     hp->timer_ticks++;
     switch(hp->timer_state) {
     case arbwait:
         /* Only allow for 5 ticks, thats 10 seconds and much too
          * long to wait for arbitration to complete.
          */
         if (hp->timer_ticks >= 10) {
             /* Enter force mode. */
     do_force_mode:
             hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
             printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
                    hp->dev->name);
             hp->sw_bmcr = BMCR_SPEED100;
             happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
             if (!is_lucent_phy(hp)) {
                 /* OK, seems we need do disable the transceiver for the first
                  * tick to make sure we get an accurate link state at the
                  * second tick.
                  */
                 hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
                 happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
             }
             hp->timer_state = ltrywait;
             hp->timer_ticks = 0;
             restart_timer = 1;
         } else {
             /* Anything interesting happen? */
             hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
             if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
                 int ret;
 
                 /* Just what we've been waiting for... */
                 ret = set_happy_link_modes(hp, tregs);
                 if (ret) {
                     /* Ooops, something bad happened, go to force
                      * mode.
                      *
                      * XXX Broken hubs which don't support 802.3u
                      * XXX auto-negotiation make this happen as well.
                      */
                     goto do_force_mode;
                 }
 
                 /* Success, at least so far, advance our state engine. */
                 hp->timer_state = lupwait;
                 restart_timer = 1;
             } else {
                 restart_timer = 1;
             }
         }
         break;
 
     case lupwait:
         /* Auto negotiation was successful and we are awaiting a
          * link up status.  I have decided to let this timer run
          * forever until some sort of error is signalled, reporting
          * a message to the user at 10 second intervals.
          */
         hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
         if (hp->sw_bmsr & BMSR_LSTATUS) {
             /* Wheee, it's up, display the link mode in use and put
              * the timer to sleep.
              */
             display_link_mode(hp, tregs);
             hp->timer_state = asleep;
             restart_timer = 0;
         } else {
             if (hp->timer_ticks >= 10) {
                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
                        "not completely up.\n", hp->dev->name);
                 hp->timer_ticks = 0;
                 restart_timer = 1;
             } else {
                 restart_timer = 1;
             }
         }
         break;
 
     case ltrywait:
         /* Making the timeout here too long can make it take
          * annoyingly long to attempt all of the link mode
          * permutations, but then again this is essentially
          * error recovery code for the most part.
          */
         hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
         hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
         if (hp->timer_ticks == 1) {
             if (!is_lucent_phy(hp)) {
                 /* Re-enable transceiver, we'll re-enable the transceiver next
                  * tick, then check link state on the following tick.
                  */
                 hp->sw_csconfig |= CSCONFIG_TCVDISAB;
                 happy_meal_tcvr_write(hp, tregs,
                               DP83840_CSCONFIG, hp->sw_csconfig);
             }
             restart_timer = 1;
             break;
         }
         if (hp->timer_ticks == 2) {
             if (!is_lucent_phy(hp)) {
                 hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
                 happy_meal_tcvr_write(hp, tregs,
                               DP83840_CSCONFIG, hp->sw_csconfig);
             }
             restart_timer = 1;
             break;
         }
         if (hp->sw_bmsr & BMSR_LSTATUS) {
             /* Force mode selection success. */
             display_forced_link_mode(hp, tregs);
             set_happy_link_modes(hp, tregs); /* XXX error? then what? */
             hp->timer_state = asleep;
             restart_timer = 0;
         } else {
             if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
                 int ret;
 
                 ret = try_next_permutation(hp, tregs);
                 if (ret == -1) {
                     /* Aieee, tried them all, reset the
                      * chip and try all over again.
                      */
 
                     /* Let the user know... */
                     printk(KERN_NOTICE "%s: Link down, cable problem?\n",
                            hp->dev->name);
 
                     ret = happy_meal_init(hp);
                     if (ret) {
                         /* ho hum... */
                         printk(KERN_ERR "%s: Error, cannot re-init the "
                                "Happy Meal.\n", hp->dev->name);
                     }
                     goto out;
                 }
                 if (!is_lucent_phy(hp)) {
                     hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
                                            DP83840_CSCONFIG);
                     hp->sw_csconfig |= CSCONFIG_TCVDISAB;
                     happy_meal_tcvr_write(hp, tregs,
                                   DP83840_CSCONFIG, hp->sw_csconfig);
                 }
                 hp->timer_ticks = 0;
                 restart_timer = 1;
             } else {
                 restart_timer = 1;
             }
         }
         break;
 
     case asleep:
     default:
         /* Can't happens.... */
         printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
                hp->dev->name);
         restart_timer = 0;
         hp->timer_ticks = 0;
         hp->timer_state = asleep; /* foo on you */
         break;
     }
 
     if (restart_timer) {
         hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
         add_timer(&hp->happy_timer);
     }
 
 out:
     spin_unlock_irq(&hp->happy_lock);
 }
 
 #define TX_RESET_TRIES     32
 #define RX_RESET_TRIES     32
 
 /* hp->happy_lock must be held */
 static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
 {
     int tries = TX_RESET_TRIES;
 
     HMD(("happy_meal_tx_reset: reset, "));
 
     /* Would you like to try our SMCC Delux? */
     hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
     while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
         udelay(20);
 
     /* Lettuce, tomato, buggy hardware (no extra charge)? */
     if (!tries)
         printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");
 
     /* Take care. */
     HMD(("done\n"));
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
 {
     int tries = RX_RESET_TRIES;
 
     HMD(("happy_meal_rx_reset: reset, "));
 
     /* We have a special on GNU/Viking hardware bugs today. */
     hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
     while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
         udelay(20);
 
     /* Will that be all? */
     if (!tries)
         printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");
 
     /* Don't forget your vik_1137125_wa.  Have a nice day. */
     HMD(("done\n"));
 }
 
 #define STOP_TRIES         16
 
 /* hp->happy_lock must be held */
 static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
 {
     int tries = STOP_TRIES;
 
     HMD(("happy_meal_stop: reset, "));
 
     /* We're consolidating our STB products, it's your lucky day. */
     hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
     while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
         udelay(20);
 
     /* Come back next week when we are "Sun Microelectronics". */
     if (!tries)
         printk(KERN_ERR "happy meal: Fry guys.");
 
     /* Remember: "Different name, same old buggy as shit hardware." */
     HMD(("done\n"));
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
 {
     struct net_device_stats *stats = &hp->dev->stats;
 
     stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
     hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
 
     stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
     hme_write32(hp, bregs + BMAC_UNALECTR, 0);
 
     stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
     hme_write32(hp, bregs + BMAC_GLECTR, 0);
 
     stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
 
     stats->collisions +=
         (hme_read32(hp, bregs + BMAC_EXCTR) +
          hme_read32(hp, bregs + BMAC_LTCTR));
     hme_write32(hp, bregs + BMAC_EXCTR, 0);
     hme_write32(hp, bregs + BMAC_LTCTR, 0);
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
 {
     ASD(("happy_meal_poll_stop: "));
 
     /* If polling disabled or not polling already, nothing to do. */
     if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
        (HFLAG_POLLENABLE | HFLAG_POLL)) {
         HMD(("not polling, return\n"));
         return;
     }
 
     /* Shut up the MIF. */
     ASD(("were polling, mif ints off, "));
     hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
 
     /* Turn off polling. */
     ASD(("polling off, "));
     hme_write32(hp, tregs + TCVR_CFG,
             hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
 
     /* We are no longer polling. */
     hp->happy_flags &= ~(HFLAG_POLL);
 
     /* Let the bits set. */
     udelay(200);
     ASD(("done\n"));
 }
 
 /* Only Sun can take such nice parts and fuck up the programming interface
  * like this.  Good job guys...
  */
 #define TCVR_RESET_TRIES       16 /* It should reset quickly        */
 #define TCVR_UNISOLATE_TRIES   32 /* Dis-isolation can take longer. */
 
 /* hp->happy_lock must be held */
 static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
 {
     u32 tconfig;
     int result, tries = TCVR_RESET_TRIES;
 
     tconfig = hme_read32(hp, tregs + TCVR_CFG);
     ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
     if (hp->tcvr_type == external) {
         ASD(("external<"));
         hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
         hp->tcvr_type = internal;
         hp->paddr = TCV_PADDR_ITX;
         ASD(("ISOLATE,"));
         happy_meal_tcvr_write(hp, tregs, MII_BMCR,
                       (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
         result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
         if (result == TCVR_FAILURE) {
             ASD(("phyread_fail>\n"));
             return -1;
         }
         ASD(("phyread_ok,PSELECT>"));
         hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
         hp->tcvr_type = external;
         hp->paddr = TCV_PADDR_ETX;
     } else {
         if (tconfig & TCV_CFG_MDIO1) {
             ASD(("internal<PSELECT,"));
             hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
             ASD(("ISOLATE,"));
             happy_meal_tcvr_write(hp, tregs, MII_BMCR,
                           (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
             result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
             if (result == TCVR_FAILURE) {
                 ASD(("phyread_fail>\n"));
                 return -1;
             }
             ASD(("phyread_ok,~PSELECT>"));
             hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
             hp->tcvr_type = internal;
             hp->paddr = TCV_PADDR_ITX;
         }
     }
 
     ASD(("BMCR_RESET "));
     happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
 
     while (--tries) {
         result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
         if (result == TCVR_FAILURE)
             return -1;
         hp->sw_bmcr = result;
         if (!(result & BMCR_RESET))
             break;
         udelay(20);
     }
     if (!tries) {
         ASD(("BMCR RESET FAILED!\n"));
         return -1;
     }
     ASD(("RESET_OK\n"));
 
     /* Get fresh copies of the PHY registers. */
     hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
     hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
     hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
     hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
 
     ASD(("UNISOLATE"));
     hp->sw_bmcr &= ~(BMCR_ISOLATE);
     happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
     tries = TCVR_UNISOLATE_TRIES;
     while (--tries) {
         result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
         if (result == TCVR_FAILURE)
             return -1;
         if (!(result & BMCR_ISOLATE))
             break;
         udelay(20);
     }
     if (!tries) {
         ASD((" FAILED!\n"));
         return -1;
     }
     ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
     if (!is_lucent_phy(hp)) {
         result = happy_meal_tcvr_read(hp, tregs,
                           DP83840_CSCONFIG);
         happy_meal_tcvr_write(hp, tregs,
                       DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
     }
     return 0;
 }
 
 /* Figure out whether we have an internal or external transceiver.
  *
  * hp->happy_lock must be held
  */
 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
 {
     unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
 
     ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
     if (hp->happy_flags & HFLAG_POLL) {
         /* If we are polling, we must stop to get the transceiver type. */
         ASD(("<polling> "));
         if (hp->tcvr_type == internal) {
             if (tconfig & TCV_CFG_MDIO1) {
                 ASD(("<internal> <poll stop> "));
                 happy_meal_poll_stop(hp, tregs);
                 hp->paddr = TCV_PADDR_ETX;
                 hp->tcvr_type = external;
                 ASD(("<external>\n"));
                 tconfig &= ~(TCV_CFG_PENABLE);
                 tconfig |= TCV_CFG_PSELECT;
                 hme_write32(hp, tregs + TCVR_CFG, tconfig);
             }
         } else {
             if (hp->tcvr_type == external) {
                 ASD(("<external> "));
                 if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
                     ASD(("<poll stop> "));
                     happy_meal_poll_stop(hp, tregs);
                     hp->paddr = TCV_PADDR_ITX;
                     hp->tcvr_type = internal;
                     ASD(("<internal>\n"));
                     hme_write32(hp, tregs + TCVR_CFG,
                             hme_read32(hp, tregs + TCVR_CFG) &
                             ~(TCV_CFG_PSELECT));
                 }
                 ASD(("\n"));
             } else {
                 ASD(("<none>\n"));
             }
         }
     } else {
         u32 reread = hme_read32(hp, tregs + TCVR_CFG);
 
         /* Else we can just work off of the MDIO bits. */
         ASD(("<not polling> "));
         if (reread & TCV_CFG_MDIO1) {
             hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
             hp->paddr = TCV_PADDR_ETX;
             hp->tcvr_type = external;
             ASD(("<external>\n"));
         } else {
             if (reread & TCV_CFG_MDIO0) {
                 hme_write32(hp, tregs + TCVR_CFG,
                         tconfig & ~(TCV_CFG_PSELECT));
                 hp->paddr = TCV_PADDR_ITX;
                 hp->tcvr_type = internal;
                 ASD(("<internal>\n"));
             } else {
                 printk(KERN_ERR "happy meal: Transceiver and a coke please.");
                 hp->tcvr_type = none; /* Grrr... */
                 ASD(("<none>\n"));
             }
         }
     }
 }
 
 /* The receive ring buffers are a bit tricky to get right.  Here goes...
  *
  * The buffers we dma into must be 64 byte aligned.  So we use a special
  * alloc_skb() routine for the happy meal to allocate 64 bytes more than
  * we really need.
  *
  * We use skb_reserve() to align the data block we get in the skb.  We
  * also program the etxregs->cfg register to use an offset of 2.  This
  * imperical constant plus the ethernet header size will always leave
  * us with a nicely aligned ip header once we pass things up to the
  * protocol layers.
  *
  * The numbers work out to:
  *
  *         Max ethernet frame size         1518
  *         Ethernet header size              14
  *         Happy Meal base offset             2
  *
  * Say a skb data area is at 0xf001b010, and its size alloced is
  * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
  *
  * First our alloc_skb() routine aligns the data base to a 64 byte
  * boundary.  We now have 0xf001b040 as our skb data address.  We
  * plug this into the receive descriptor address.
  *
  * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
  * So now the data we will end up looking at starts at 0xf001b042.  When
  * the packet arrives, we will check out the size received and subtract
  * this from the skb->length.  Then we just pass the packet up to the
  * protocols as is, and allocate a new skb to replace this slot we have
  * just received from.
  *
  * The ethernet layer will strip the ether header from the front of the
  * skb we just sent to it, this leaves us with the ip header sitting
  * nicely aligned at 0xf001b050.  Also, for tcp and udp packets the
  * Happy Meal has even checksummed the tcp/udp data for us.  The 16
  * bit checksum is obtained from the low bits of the receive descriptor
  * flags, thus:
  *
  *  skb->csum = rxd->rx_flags & 0xffff;
  *  skb->ip_summed = CHECKSUM_COMPLETE;
  *
  * before sending off the skb to the protocols, and we are good as gold.
  */
 static void happy_meal_clean_rings(struct happy_meal *hp)
 {
     int i;
 
     for (i = 0; i < RX_RING_SIZE; i++) {
         if (hp->rx_skbs[i] != NULL) {
             struct sk_buff *skb = hp->rx_skbs[i];
             struct happy_meal_rxd *rxd;
             u32 dma_addr;
 
             rxd = &hp->happy_block->happy_meal_rxd[i];
             dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
             dma_unmap_single(hp->dma_dev, dma_addr,
                      RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
             dev_kfree_skb_any(skb);
             hp->rx_skbs[i] = NULL;
         }
     }
 
     for (i = 0; i < TX_RING_SIZE; i++) {
         if (hp->tx_skbs[i] != NULL) {
             struct sk_buff *skb = hp->tx_skbs[i];
             struct happy_meal_txd *txd;
             u32 dma_addr;
             int frag;
 
             hp->tx_skbs[i] = NULL;
 
             for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
                 txd = &hp->happy_block->happy_meal_txd[i];
                 dma_addr = hme_read_desc32(hp, &txd->tx_addr);
                 if (!frag)
                     dma_unmap_single(hp->dma_dev, dma_addr,
                              (hme_read_desc32(hp, &txd->tx_flags)
                               & TXFLAG_SIZE),
                              DMA_TO_DEVICE);
                 else
                     dma_unmap_page(hp->dma_dev, dma_addr,
                              (hme_read_desc32(hp, &txd->tx_flags)
                               & TXFLAG_SIZE),
                              DMA_TO_DEVICE);
 
                 if (frag != skb_shinfo(skb)->nr_frags)
                     i++;
             }
 
             dev_kfree_skb_any(skb);
         }
     }
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_init_rings(struct happy_meal *hp)
 {
     struct hmeal_init_block *hb = hp->happy_block;
     int i;
 
     HMD(("happy_meal_init_rings: counters to zero, "));
     hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
 
     /* Free any skippy bufs left around in the rings. */
     HMD(("clean, "));
     happy_meal_clean_rings(hp);
 
     /* Now get new skippy bufs for the receive ring. */
     HMD(("init rxring, "));
     for (i = 0; i < RX_RING_SIZE; i++) {
         struct sk_buff *skb;
         u32 mapping;
 
         skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
         if (!skb) {
             hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
             continue;
         }
         hp->rx_skbs[i] = skb;
 
         /* Because we reserve afterwards. */
         skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
         mapping = dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
                      DMA_FROM_DEVICE);
         if (dma_mapping_error(hp->dma_dev, mapping)) {
             dev_kfree_skb_any(skb);
             hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
             continue;
         }
         hme_write_rxd(hp, &hb->happy_meal_rxd[i],
                   (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
                   mapping);
         skb_reserve(skb, RX_OFFSET);
     }
 
     HMD(("init txring, "));
     for (i = 0; i < TX_RING_SIZE; i++)
         hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
 
     HMD(("done\n"));
 }
 
 /* hp->happy_lock must be held */
 static void
 happy_meal_begin_auto_negotiation(struct happy_meal *hp,
                   void __iomem *tregs,
                   const struct ethtool_link_ksettings *ep)
 {
     int timeout;
 
     /* Read all of the registers we are interested in now. */
     hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
     hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
     hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
     hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
 
     /* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
 
     hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
     if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
         /* Advertise everything we can support. */
         if (hp->sw_bmsr & BMSR_10HALF)
             hp->sw_advertise |= (ADVERTISE_10HALF);
         else
             hp->sw_advertise &= ~(ADVERTISE_10HALF);
 
         if (hp->sw_bmsr & BMSR_10FULL)
             hp->sw_advertise |= (ADVERTISE_10FULL);
         else
             hp->sw_advertise &= ~(ADVERTISE_10FULL);
         if (hp->sw_bmsr & BMSR_100HALF)
             hp->sw_advertise |= (ADVERTISE_100HALF);
         else
             hp->sw_advertise &= ~(ADVERTISE_100HALF);
         if (hp->sw_bmsr & BMSR_100FULL)
             hp->sw_advertise |= (ADVERTISE_100FULL);
         else
             hp->sw_advertise &= ~(ADVERTISE_100FULL);
         happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
 
         /* XXX Currently no Happy Meal cards I know off support 100BaseT4,
          * XXX and this is because the DP83840 does not support it, changes
          * XXX would need to be made to the tx/rx logic in the driver as well
          * XXX so I completely skip checking for it in the BMSR for now.
          */
 
 #ifdef AUTO_SWITCH_DEBUG
         ASD(("%s: Advertising [ ", hp->dev->name));
         if (hp->sw_advertise & ADVERTISE_10HALF)
             ASD(("10H "));
         if (hp->sw_advertise & ADVERTISE_10FULL)
             ASD(("10F "));
         if (hp->sw_advertise & ADVERTISE_100HALF)
             ASD(("100H "));
         if (hp->sw_advertise & ADVERTISE_100FULL)
             ASD(("100F "));
 #endif
 
         /* Enable Auto-Negotiation, this is usually on already... */
         hp->sw_bmcr |= BMCR_ANENABLE;
         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
         /* Restart it to make sure it is going. */
         hp->sw_bmcr |= BMCR_ANRESTART;
         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
         /* BMCR_ANRESTART self clears when the process has begun. */
 
         timeout = 64;  /* More than enough. */
         while (--timeout) {
             hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
             if (!(hp->sw_bmcr & BMCR_ANRESTART))
                 break; /* got it. */
             udelay(10);
         }
         if (!timeout) {
             printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
                    "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
             printk(KERN_NOTICE "%s: Performing force link detection.\n",
                    hp->dev->name);
             goto force_link;
         } else {
             hp->timer_state = arbwait;
         }
     } else {
 force_link:
         /* Force the link up, trying first a particular mode.
          * Either we are here at the request of ethtool or
          * because the Happy Meal would not start to autoneg.
          */
 
         /* Disable auto-negotiation in BMCR, enable the duplex and
          * speed setting, init the timer state machine, and fire it off.
          */
         if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
             hp->sw_bmcr = BMCR_SPEED100;
         } else {
             if (ep->base.speed == SPEED_100)
                 hp->sw_bmcr = BMCR_SPEED100;
             else
                 hp->sw_bmcr = 0;
             if (ep->base.duplex == DUPLEX_FULL)
                 hp->sw_bmcr |= BMCR_FULLDPLX;
         }
         happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
         if (!is_lucent_phy(hp)) {
             /* OK, seems we need do disable the transceiver for the first
              * tick to make sure we get an accurate link state at the
              * second tick.
              */
             hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
                                    DP83840_CSCONFIG);
             hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
             happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
                           hp->sw_csconfig);
         }
         hp->timer_state = ltrywait;
     }
 
     hp->timer_ticks = 0;
     hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
     add_timer(&hp->happy_timer);
 }
 
 /* hp->happy_lock must be held */
 static int happy_meal_init(struct happy_meal *hp)
 {
     const unsigned char *e = &hp->dev->dev_addr[0];
     void __iomem *gregs        = hp->gregs;
     void __iomem *etxregs      = hp->etxregs;
     void __iomem *erxregs      = hp->erxregs;
     void __iomem *bregs        = hp->bigmacregs;
     void __iomem *tregs        = hp->tcvregs;
     u32 regtmp, rxcfg;
 
     /* If auto-negotiation timer is running, kill it. */
     del_timer(&hp->happy_timer);
 
     HMD(("happy_meal_init: happy_flags[%08x] ",
          hp->happy_flags));
     if (!(hp->happy_flags & HFLAG_INIT)) {
         HMD(("set HFLAG_INIT, "));
         hp->happy_flags |= HFLAG_INIT;
         happy_meal_get_counters(hp, bregs);
     }
 
     /* Stop polling. */
     HMD(("to happy_meal_poll_stop\n"));
     happy_meal_poll_stop(hp, tregs);
 
     /* Stop transmitter and receiver. */
     HMD(("happy_meal_init: to happy_meal_stop\n"));
     happy_meal_stop(hp, gregs);
 
     /* Alloc and reset the tx/rx descriptor chains. */
     HMD(("happy_meal_init: to happy_meal_init_rings\n"));
     happy_meal_init_rings(hp);
 
     /* Shut up the MIF. */
     HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
          hme_read32(hp, tregs + TCVR_IMASK)));
     hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
 
     /* See if we can enable the MIF frame on this card to speak to the DP83840. */
     if (hp->happy_flags & HFLAG_FENABLE) {
         HMD(("use frame old[%08x], ",
              hme_read32(hp, tregs + TCVR_CFG)));
         hme_write32(hp, tregs + TCVR_CFG,
                 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
     } else {
         HMD(("use bitbang old[%08x], ",
              hme_read32(hp, tregs + TCVR_CFG)));
         hme_write32(hp, tregs + TCVR_CFG,
                 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
     }
 
     /* Check the state of the transceiver. */
     HMD(("to happy_meal_transceiver_check\n"));
     happy_meal_transceiver_check(hp, tregs);
 
     /* Put the Big Mac into a sane state. */
     HMD(("happy_meal_init: "));
     switch(hp->tcvr_type) {
     case none:
         /* Cannot operate if we don't know the transceiver type! */
         HMD(("AAIEEE no transceiver type, EAGAIN"));
         return -EAGAIN;
 
     case internal:
         /* Using the MII buffers. */
         HMD(("internal, using MII, "));
         hme_write32(hp, bregs + BMAC_XIFCFG, 0);
         break;
 
     case external:
         /* Not using the MII, disable it. */
         HMD(("external, disable MII, "));
         hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
         break;
     }
 
     if (happy_meal_tcvr_reset(hp, tregs))
         return -EAGAIN;
 
     /* Reset the Happy Meal Big Mac transceiver and the receiver. */
     HMD(("tx/rx reset, "));
     happy_meal_tx_reset(hp, bregs);
     happy_meal_rx_reset(hp, bregs);
 
     /* Set jam size and inter-packet gaps to reasonable defaults. */
     HMD(("jsize/ipg1/ipg2, "));
     hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
     hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
     hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
 
     /* Load up the MAC address and random seed. */
     HMD(("rseed/macaddr, "));
 
     /* The docs recommend to use the 10LSB of our MAC here. */
     hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
 
     hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
     hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
     hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
 
     HMD(("htable, "));
     if ((hp->dev->flags & IFF_ALLMULTI) ||
         (netdev_mc_count(hp->dev) > 64)) {
         hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
     } else if ((hp->dev->flags & IFF_PROMISC) == 0) {
         u16 hash_table[4];
         struct netdev_hw_addr *ha;
         u32 crc;
 
         memset(hash_table, 0, sizeof(hash_table));
         netdev_for_each_mc_addr(ha, hp->dev) {
             crc = ether_crc_le(6, ha->addr);
             crc >>= 26;
             hash_table[crc >> 4] |= 1 << (crc & 0xf);
         }
         hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
         hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
         hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
         hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
     } else {
         hme_write32(hp, bregs + BMAC_HTABLE3, 0);
         hme_write32(hp, bregs + BMAC_HTABLE2, 0);
         hme_write32(hp, bregs + BMAC_HTABLE1, 0);
         hme_write32(hp, bregs + BMAC_HTABLE0, 0);
     }
 
     /* Set the RX and TX ring ptrs. */
     HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
          ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
          ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
     hme_write32(hp, erxregs + ERX_RING,
             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
     hme_write32(hp, etxregs + ETX_RING,
             ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
 
     /* Parity issues in the ERX unit of some HME revisions can cause some
      * registers to not be written unless their parity is even.  Detect such
      * lost writes and simply rewrite with a low bit set (which will be ignored
      * since the rxring needs to be 2K aligned).
      */
     if (hme_read32(hp, erxregs + ERX_RING) !=
         ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
         hme_write32(hp, erxregs + ERX_RING,
                 ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
                 | 0x4);
 
     /* Set the supported burst sizes. */
     HMD(("happy_meal_init: old[%08x] bursts<",
          hme_read32(hp, gregs + GREG_CFG)));
 
 #ifndef CONFIG_SPARC
     /* It is always PCI and can handle 64byte bursts. */
     hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
 #else
     if ((hp->happy_bursts & DMA_BURST64) &&
         ((hp->happy_flags & HFLAG_PCI) != 0
 #ifdef CONFIG_SBUS
          || sbus_can_burst64()
 #endif
          || 0)) {
         u32 gcfg = GREG_CFG_BURST64;
 
         /* I have no idea if I should set the extended
          * transfer mode bit for Cheerio, so for now I
          * do not.  -DaveM
          */
 #ifdef CONFIG_SBUS
         if ((hp->happy_flags & HFLAG_PCI) == 0) {
             struct platform_device *op = hp->happy_dev;
             if (sbus_can_dma_64bit()) {
                 sbus_set_sbus64(&op->dev,
                         hp->happy_bursts);
                 gcfg |= GREG_CFG_64BIT;
             }
         }
 #endif
 
         HMD(("64>"));
         hme_write32(hp, gregs + GREG_CFG, gcfg);
     } else if (hp->happy_bursts & DMA_BURST32) {
         HMD(("32>"));
         hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
     } else if (hp->happy_bursts & DMA_BURST16) {
         HMD(("16>"));
         hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
     } else {
         HMD(("XXX>"));
         hme_write32(hp, gregs + GREG_CFG, 0);
     }
 #endif /* CONFIG_SPARC */
 
     /* Turn off interrupts we do not want to hear. */
     HMD((", enable global interrupts, "));
     hme_write32(hp, gregs + GREG_IMASK,
             (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
              GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
 
     /* Set the transmit ring buffer size. */
     HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
          hme_read32(hp, etxregs + ETX_RSIZE)));
     hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
 
     /* Enable transmitter DVMA. */
     HMD(("tx dma enable old[%08x], ",
          hme_read32(hp, etxregs + ETX_CFG)));
     hme_write32(hp, etxregs + ETX_CFG,
             hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
 
     /* This chip really rots, for the receiver sometimes when you
      * write to its control registers not all the bits get there
      * properly.  I cannot think of a sane way to provide complete
      * coverage for this hardware bug yet.
      */
     HMD(("erx regs bug old[%08x]\n",
          hme_read32(hp, erxregs + ERX_CFG)));
     hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
     regtmp = hme_read32(hp, erxregs + ERX_CFG);
     hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
     if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
         printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
         printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
                ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
         /* XXX Should return failure here... */
     }
 
     /* Enable Big Mac hash table filter. */
     HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
          hme_read32(hp, bregs + BMAC_RXCFG)));
     rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
     if (hp->dev->flags & IFF_PROMISC)
         rxcfg |= BIGMAC_RXCFG_PMISC;
     hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
 
     /* Let the bits settle in the chip. */
     udelay(10);
 
     /* Ok, configure the Big Mac transmitter. */
     HMD(("BIGMAC init, "));
     regtmp = 0;
     if (hp->happy_flags & HFLAG_FULL)
         regtmp |= BIGMAC_TXCFG_FULLDPLX;
 
     /* Don't turn on the "don't give up" bit for now.  It could cause hme
      * to deadlock with the PHY if a Jabber occurs.
      */
     hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
 
     /* Give up after 16 TX attempts. */
     hme_write32(hp, bregs + BMAC_ALIMIT, 16);
 
     /* Enable the output drivers no matter what. */
     regtmp = BIGMAC_XCFG_ODENABLE;
 
     /* If card can do lance mode, enable it. */
     if (hp->happy_flags & HFLAG_LANCE)
         regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
 
     /* Disable the MII buffers if using external transceiver. */
     if (hp->tcvr_type == external)
         regtmp |= BIGMAC_XCFG_MIIDISAB;
 
     HMD(("XIF config old[%08x], ",
          hme_read32(hp, bregs + BMAC_XIFCFG)));
     hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
 
     /* Start things up. */
     HMD(("tx old[%08x] and rx [%08x] ON!\n",
          hme_read32(hp, bregs + BMAC_TXCFG),
          hme_read32(hp, bregs + BMAC_RXCFG)));
 
     /* Set larger TX/RX size to allow for 802.1q */
     hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
     hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
 
     hme_write32(hp, bregs + BMAC_TXCFG,
             hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
     hme_write32(hp, bregs + BMAC_RXCFG,
             hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
 
     /* Get the autonegotiation started, and the watch timer ticking. */
     happy_meal_begin_auto_negotiation(hp, tregs, NULL);
 
     /* Success. */
     return 0;
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
 {
     void __iomem *tregs = hp->tcvregs;
     void __iomem *bregs = hp->bigmacregs;
     void __iomem *gregs = hp->gregs;
 
     happy_meal_stop(hp, gregs);
     hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
     if (hp->happy_flags & HFLAG_FENABLE)
         hme_write32(hp, tregs + TCVR_CFG,
                 hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
     else
         hme_write32(hp, tregs + TCVR_CFG,
                 hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
     happy_meal_transceiver_check(hp, tregs);
     switch(hp->tcvr_type) {
     case none:
         return;
     case internal:
         hme_write32(hp, bregs + BMAC_XIFCFG, 0);
         break;
     case external:
         hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
         break;
     }
     if (happy_meal_tcvr_reset(hp, tregs))
         return;
 
     /* Latch PHY registers as of now. */
     hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
     hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
 
     /* Advertise everything we can support. */
     if (hp->sw_bmsr & BMSR_10HALF)
         hp->sw_advertise |= (ADVERTISE_10HALF);
     else
         hp->sw_advertise &= ~(ADVERTISE_10HALF);
 
     if (hp->sw_bmsr & BMSR_10FULL)
         hp->sw_advertise |= (ADVERTISE_10FULL);
     else
         hp->sw_advertise &= ~(ADVERTISE_10FULL);
     if (hp->sw_bmsr & BMSR_100HALF)
         hp->sw_advertise |= (ADVERTISE_100HALF);
     else
         hp->sw_advertise &= ~(ADVERTISE_100HALF);
     if (hp->sw_bmsr & BMSR_100FULL)
         hp->sw_advertise |= (ADVERTISE_100FULL);
     else
         hp->sw_advertise &= ~(ADVERTISE_100FULL);
 
     /* Update the PHY advertisement register. */
     happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
 }
 
 /* Once status is latched (by happy_meal_interrupt) it is cleared by
  * the hardware, so we cannot re-read it and get a correct value.
  *
  * hp->happy_lock must be held
  */
 static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
 {
     int reset = 0;
 
     /* Only print messages for non-counter related interrupts. */
     if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
               GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
               GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
               GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
               GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
               GREG_STAT_SLVPERR))
         printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
                hp->dev->name, status);
 
     if (status & GREG_STAT_RFIFOVF) {
         /* Receive FIFO overflow is harmless and the hardware will take
            care of it, just some packets are lost. Who cares. */
         printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
     }
 
     if (status & GREG_STAT_STSTERR) {
         /* BigMAC SQE link test failed. */
         printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
         reset = 1;
     }
 
     if (status & GREG_STAT_TFIFO_UND) {
         /* Transmit FIFO underrun, again DMA error likely. */
         printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
                hp->dev->name);
         reset = 1;
     }
 
     if (status & GREG_STAT_MAXPKTERR) {
         /* Driver error, tried to transmit something larger
          * than ethernet max mtu.
          */
         printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
         reset = 1;
     }
 
     if (status & GREG_STAT_NORXD) {
         /* This is harmless, it just means the system is
          * quite loaded and the incoming packet rate was
          * faster than the interrupt handler could keep up
          * with.
          */
         printk(KERN_INFO "%s: Happy Meal out of receive "
                "descriptors, packet dropped.\n",
                hp->dev->name);
     }
 
     if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
         /* All sorts of DMA receive errors. */
         printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
         if (status & GREG_STAT_RXERR)
             printk("GenericError ");
         if (status & GREG_STAT_RXPERR)
             printk("ParityError ");
         if (status & GREG_STAT_RXTERR)
             printk("RxTagBotch ");
         printk("]\n");
         reset = 1;
     }
 
     if (status & GREG_STAT_EOPERR) {
         /* Driver bug, didn't set EOP bit in tx descriptor given
          * to the happy meal.
          */
         printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
                hp->dev->name);
         reset = 1;
     }
 
     if (status & GREG_STAT_MIFIRQ) {
         /* MIF signalled an interrupt, were we polling it? */
         printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
     }
 
     if (status &
         (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
         /* All sorts of transmit DMA errors. */
         printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
         if (status & GREG_STAT_TXEACK)
             printk("GenericError ");
         if (status & GREG_STAT_TXLERR)
             printk("LateError ");
         if (status & GREG_STAT_TXPERR)
             printk("ParityError ");
         if (status & GREG_STAT_TXTERR)
             printk("TagBotch ");
         printk("]\n");
         reset = 1;
     }
 
     if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
         /* Bus or parity error when cpu accessed happy meal registers
          * or it's internal FIFO's.  Should never see this.
          */
         printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
                hp->dev->name,
                (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
         reset = 1;
     }
 
     if (reset) {
         printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
         happy_meal_init(hp);
         return 1;
     }
     return 0;
 }
 
 /* hp->happy_lock must be held */
 static void happy_meal_mif_interrupt(struct happy_meal *hp)
 {
     void __iomem *tregs = hp->tcvregs;
 
     printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
     hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
     hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
 
     /* Use the fastest transmission protocol possible. */
     if (hp->sw_lpa & LPA_100FULL) {
         printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
         hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
     } else if (hp->sw_lpa & LPA_100HALF) {
         printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
         hp->sw_bmcr |= BMCR_SPEED100;
     } else if (hp->sw_lpa & LPA_10FULL) {
         printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
         hp->sw_bmcr |= BMCR_FULLDPLX;
     } else {
         printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
     }
     happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
 
     /* Finally stop polling and shut up the MIF. */
     happy_meal_poll_stop(hp, tregs);
 }
 
 #ifdef TXDEBUG
 #define TXD(x) printk x
 #else
 #define TXD(x)
 #endif
 
 /* hp->happy_lock must be held */
 static void happy_meal_tx(struct happy_meal *hp)
 {
     struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
     struct happy_meal_txd *this;
     struct net_device *dev = hp->dev;
     int elem;
 
     elem = hp->tx_old;
     TXD(("TX<"));
     while (elem != hp->tx_new) {
         struct sk_buff *skb;
         u32 flags, dma_addr, dma_len;
         int frag;
 
         TXD(("[%d]", elem));
         this = &txbase[elem];
         flags = hme_read_desc32(hp, &this->tx_flags);
         if (flags & TXFLAG_OWN)
             break;
         skb = hp->tx_skbs[elem];
         if (skb_shinfo(skb)->nr_frags) {
             int last;
 
             last = elem + skb_shinfo(skb)->nr_frags;
             last &= (TX_RING_SIZE - 1);
             flags = hme_read_desc32(hp, &txbase[last].tx_flags);
             if (flags & TXFLAG_OWN)
                 break;
         }
         hp->tx_skbs[elem] = NULL;
         dev->stats.tx_bytes += skb->len;
 
         for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
             dma_addr = hme_read_desc32(hp, &this->tx_addr);
             dma_len = hme_read_desc32(hp, &this->tx_flags);
 
             dma_len &= TXFLAG_SIZE;
             if (!frag)
                 dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
             else
                 dma_unmap_page(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
 
             elem = NEXT_TX(elem);
             this = &txbase[elem];
         }
 
         dev_consume_skb_irq(skb);
         dev->stats.tx_packets++;
     }
     hp->tx_old = elem;
     TXD((">"));
 
     if (netif_queue_stopped(dev) &&
         TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
         netif_wake_queue(dev);
 }
 
 #ifdef RXDEBUG
 #define RXD(x) printk x
 #else
 #define RXD(x)
 #endif
 
 /* Originally I used to handle the allocation failure by just giving back just
  * that one ring buffer to the happy meal.  Problem is that usually when that
  * condition is triggered, the happy meal expects you to do something reasonable
  * with all of the packets it has DMA'd in.  So now I just drop the entire
  * ring when we cannot get a new skb and give them all back to the happy meal,
  * maybe things will be "happier" now.
  *
  * hp->happy_lock must be held
  */
 static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
 {
     struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
     struct happy_meal_rxd *this;
     int elem = hp->rx_new, drops = 0;
     u32 flags;
 
     RXD(("RX<"));
     this = &rxbase[elem];
     while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
         struct sk_buff *skb;
         int len = flags >> 16;
         u16 csum = flags & RXFLAG_CSUM;
         u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
 
         RXD(("[%d ", elem));
 
         /* Check for errors. */
         if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
             RXD(("ERR(%08x)]", flags));
             dev->stats.rx_errors++;
             if (len < ETH_ZLEN)
                 dev->stats.rx_length_errors++;
             if (len & (RXFLAG_OVERFLOW >> 16)) {
                 dev->stats.rx_over_errors++;
                 dev->stats.rx_fifo_errors++;
             }
 
             /* Return it to the Happy meal. */
     drop_it:
             dev->stats.rx_dropped++;
             hme_write_rxd(hp, this,
                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
                       dma_addr);
             goto next;
         }
         skb = hp->rx_skbs[elem];
         if (len > RX_COPY_THRESHOLD) {
             struct sk_buff *new_skb;
             u32 mapping;
 
             /* Now refill the entry, if we can. */
             new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
             if (new_skb == NULL) {
                 drops++;
                 goto drop_it;
             }
             skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
             mapping = dma_map_single(hp->dma_dev, new_skb->data,
                          RX_BUF_ALLOC_SIZE,
                          DMA_FROM_DEVICE);
             if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
                 dev_kfree_skb_any(new_skb);
                 drops++;
                 goto drop_it;
             }
 
             dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
             hp->rx_skbs[elem] = new_skb;
             hme_write_rxd(hp, this,
                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
                       mapping);
             skb_reserve(new_skb, RX_OFFSET);
 
             /* Trim the original skb for the netif. */
             skb_trim(skb, len);
         } else {
             struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2);
 
             if (copy_skb == NULL) {
                 drops++;
                 goto drop_it;
             }
 
             skb_reserve(copy_skb, 2);
             skb_put(copy_skb, len);
             dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len + 2, DMA_FROM_DEVICE);
             skb_copy_from_linear_data(skb, copy_skb->data, len);
             dma_sync_single_for_device(hp->dma_dev, dma_addr, len + 2, DMA_FROM_DEVICE);
             /* Reuse original ring buffer. */
             hme_write_rxd(hp, this,
                       (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
                       dma_addr);
 
             skb = copy_skb;
         }
 
         /* This card is _fucking_ hot... */
         skb->csum = csum_unfold(~(__force __sum16)htons(csum));
         skb->ip_summed = CHECKSUM_COMPLETE;
 
         RXD(("len=%d csum=%4x]", len, csum));
         skb->protocol = eth_type_trans(skb, dev);
         netif_rx(skb);
 
         dev->stats.rx_packets++;
         dev->stats.rx_bytes += len;
     next:
         elem = NEXT_RX(elem);
         this = &rxbase[elem];
     }
     hp->rx_new = elem;
     if (drops)
         printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
     RXD((">"));
 }
 
 static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
 {
     struct net_device *dev = dev_id;
     struct happy_meal *hp  = netdev_priv(dev);
     u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
 
     HMD(("happy_meal_interrupt: status=%08x ", happy_status));
 
     spin_lock(&hp->happy_lock);
 
     if (happy_status & GREG_STAT_ERRORS) {
         HMD(("ERRORS "));
         if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
             goto out;
     }
 
     if (happy_status & GREG_STAT_MIFIRQ) {
         HMD(("MIFIRQ "));
         happy_meal_mif_interrupt(hp);
     }
 
     if (happy_status & GREG_STAT_TXALL) {
         HMD(("TXALL "));
         happy_meal_tx(hp);
     }
 
     if (happy_status & GREG_STAT_RXTOHOST) {
         HMD(("RXTOHOST "));
         happy_meal_rx(hp, dev);
     }
 
     HMD(("done\n"));
 out:
     spin_unlock(&hp->happy_lock);
 
     return IRQ_HANDLED;
 }
 
 #ifdef CONFIG_SBUS
 static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
 {
     struct quattro *qp = (struct quattro *) cookie;
     int i;
 
     for (i = 0; i < 4; i++) {
         struct net_device *dev = qp->happy_meals[i];
         struct happy_meal *hp  = netdev_priv(dev);
         u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
 
         HMD(("quattro_interrupt: status=%08x ", happy_status));
 
         if (!(happy_status & (GREG_STAT_ERRORS |
                       GREG_STAT_MIFIRQ |
                       GREG_STAT_TXALL |
                       GREG_STAT_RXTOHOST)))
             continue;
 
         spin_lock(&hp->happy_lock);
 
         if (happy_status & GREG_STAT_ERRORS) {
             HMD(("ERRORS "));
             if (happy_meal_is_not_so_happy(hp, happy_status))
                 goto next;
         }
 
         if (happy_status & GREG_STAT_MIFIRQ) {
             HMD(("MIFIRQ "));
             happy_meal_mif_interrupt(hp);
         }
 
         if (happy_status & GREG_STAT_TXALL) {
             HMD(("TXALL "));
             happy_meal_tx(hp);
         }
 
         if (happy_status & GREG_STAT_RXTOHOST) {
             HMD(("RXTOHOST "));
             happy_meal_rx(hp, dev);
         }
 
     next:
         spin_unlock(&hp->happy_lock);
     }
     HMD(("done\n"));
 
     return IRQ_HANDLED;
 }
 #endif
 
 static int happy_meal_open(struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
     int res;
 
     HMD(("happy_meal_open: "));
 
     /* On SBUS Quattro QFE cards, all hme interrupts are concentrated
      * into a single source which we register handling at probe time.
      */
     if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
         res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
                   dev->name, dev);
         if (res) {
             HMD(("EAGAIN\n"));
             printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
                    hp->irq);
 
             return -EAGAIN;
         }
     }
 
     HMD(("to happy_meal_init\n"));
 
     spin_lock_irq(&hp->happy_lock);
     res = happy_meal_init(hp);
     spin_unlock_irq(&hp->happy_lock);
 
     if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
         free_irq(hp->irq, dev);
     return res;
 }
 
 static int happy_meal_close(struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     spin_lock_irq(&hp->happy_lock);
     happy_meal_stop(hp, hp->gregs);
     happy_meal_clean_rings(hp);
 
     /* If auto-negotiation timer is running, kill it. */
     del_timer(&hp->happy_timer);
 
     spin_unlock_irq(&hp->happy_lock);
 
     /* On Quattro QFE cards, all hme interrupts are concentrated
      * into a single source which we register handling at probe
      * time and never unregister.
      */
     if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
         free_irq(hp->irq, dev);
 
     return 0;
 }
 
 #ifdef SXDEBUG
 #define SXD(x) printk x
 #else
 #define SXD(x)
 #endif
 
 static void happy_meal_tx_timeout(struct net_device *dev, unsigned int txqueue)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
     tx_dump_log();
     printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
         hme_read32(hp, hp->gregs + GREG_STAT),
         hme_read32(hp, hp->etxregs + ETX_CFG),
         hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
 
     spin_lock_irq(&hp->happy_lock);
     happy_meal_init(hp);
     spin_unlock_irq(&hp->happy_lock);
 
     netif_wake_queue(dev);
 }
 
 static void unmap_partial_tx_skb(struct happy_meal *hp, u32 first_mapping,
                  u32 first_len, u32 first_entry, u32 entry)
 {
     struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
 
     dma_unmap_single(hp->dma_dev, first_mapping, first_len, DMA_TO_DEVICE);
 
     first_entry = NEXT_TX(first_entry);
     while (first_entry != entry) {
         struct happy_meal_txd *this = &txbase[first_entry];
         u32 addr, len;
 
         addr = hme_read_desc32(hp, &this->tx_addr);
         len = hme_read_desc32(hp, &this->tx_flags);
         len &= TXFLAG_SIZE;
         dma_unmap_page(hp->dma_dev, addr, len, DMA_TO_DEVICE);
     }
 }
 
 static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
                      struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
     int entry;
     u32 tx_flags;
 
     tx_flags = TXFLAG_OWN;
     if (skb->ip_summed == CHECKSUM_PARTIAL) {
         const u32 csum_start_off = skb_checksum_start_offset(skb);
         const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
 
         tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
                 ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
                 ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
     }
 
     spin_lock_irq(&hp->happy_lock);
 
     if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
         netif_stop_queue(dev);
         spin_unlock_irq(&hp->happy_lock);
         printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
                dev->name);
         return NETDEV_TX_BUSY;
     }
 
     entry = hp->tx_new;
     SXD(("SX<l[%d]e[%d]>", len, entry));
     hp->tx_skbs[entry] = skb;
 
     if (skb_shinfo(skb)->nr_frags == 0) {
         u32 mapping, len;
 
         len = skb->len;
         mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
         if (unlikely(dma_mapping_error(hp->dma_dev, mapping)))
             goto out_dma_error;
         tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
         hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
                   (tx_flags | (len & TXFLAG_SIZE)),
                   mapping);
         entry = NEXT_TX(entry);
     } else {
         u32 first_len, first_mapping;
         int frag, first_entry = entry;
 
         /* We must give this initial chunk to the device last.
          * Otherwise we could race with the device.
          */
         first_len = skb_headlen(skb);
         first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
                            DMA_TO_DEVICE);
         if (unlikely(dma_mapping_error(hp->dma_dev, first_mapping)))
             goto out_dma_error;
         entry = NEXT_TX(entry);
 
         for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
             const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
             u32 len, mapping, this_txflags;
 
             len = skb_frag_size(this_frag);
             mapping = skb_frag_dma_map(hp->dma_dev, this_frag,
                            0, len, DMA_TO_DEVICE);
             if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
                 unmap_partial_tx_skb(hp, first_mapping, first_len,
                              first_entry, entry);
                 goto out_dma_error;
             }
             this_txflags = tx_flags;
             if (frag == skb_shinfo(skb)->nr_frags - 1)
                 this_txflags |= TXFLAG_EOP;
             hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
                       (this_txflags | (len & TXFLAG_SIZE)),
                       mapping);
             entry = NEXT_TX(entry);
         }
         hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
                   (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
                   first_mapping);
     }
 
     hp->tx_new = entry;
 
     if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
         netif_stop_queue(dev);
 
     /* Get it going. */
     hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
 
     spin_unlock_irq(&hp->happy_lock);
 
     tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
     return NETDEV_TX_OK;
 
 out_dma_error:
     hp->tx_skbs[hp->tx_new] = NULL;
     spin_unlock_irq(&hp->happy_lock);
 
     dev_kfree_skb_any(skb);
     dev->stats.tx_dropped++;
     return NETDEV_TX_OK;
 }
 
 static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     spin_lock_irq(&hp->happy_lock);
     happy_meal_get_counters(hp, hp->bigmacregs);
     spin_unlock_irq(&hp->happy_lock);
 
     return &dev->stats;
 }
 
 static void happy_meal_set_multicast(struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
     void __iomem *bregs = hp->bigmacregs;
     struct netdev_hw_addr *ha;
     u32 crc;
 
     spin_lock_irq(&hp->happy_lock);
 
     if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
         hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
         hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
     } else if (dev->flags & IFF_PROMISC) {
         hme_write32(hp, bregs + BMAC_RXCFG,
                 hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
     } else {
         u16 hash_table[4];
 
         memset(hash_table, 0, sizeof(hash_table));
         netdev_for_each_mc_addr(ha, dev) {
             crc = ether_crc_le(6, ha->addr);
             crc >>= 26;
             hash_table[crc >> 4] |= 1 << (crc & 0xf);
         }
         hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
         hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
         hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
         hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
     }
 
     spin_unlock_irq(&hp->happy_lock);
 }
 
 /* Ethtool support... */
 static int hme_get_link_ksettings(struct net_device *dev,
                   struct ethtool_link_ksettings *cmd)
 {
     struct happy_meal *hp = netdev_priv(dev);
     u32 speed;
     u32 supported;
 
     supported =
         (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
          SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
          SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
 
     /* XXX hardcoded stuff for now */
     cmd->base.port = PORT_TP; /* XXX no MII support */
     cmd->base.phy_address = 0; /* XXX fixed PHYAD */
 
     /* Record PHY settings. */
     spin_lock_irq(&hp->happy_lock);
     hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
     hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
     spin_unlock_irq(&hp->happy_lock);
 
     if (hp->sw_bmcr & BMCR_ANENABLE) {
         cmd->base.autoneg = AUTONEG_ENABLE;
         speed = ((hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
              SPEED_100 : SPEED_10);
         if (speed == SPEED_100)
             cmd->base.duplex =
                 (hp->sw_lpa & (LPA_100FULL)) ?
                 DUPLEX_FULL : DUPLEX_HALF;
         else
             cmd->base.duplex =
                 (hp->sw_lpa & (LPA_10FULL)) ?
                 DUPLEX_FULL : DUPLEX_HALF;
     } else {
         cmd->base.autoneg = AUTONEG_DISABLE;
         speed = (hp->sw_bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
         cmd->base.duplex =
             (hp->sw_bmcr & BMCR_FULLDPLX) ?
             DUPLEX_FULL : DUPLEX_HALF;
     }
     cmd->base.speed = speed;
     ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
                         supported);
 
     return 0;
 }
 
 static int hme_set_link_ksettings(struct net_device *dev,
                   const struct ethtool_link_ksettings *cmd)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     /* Verify the settings we care about. */
     if (cmd->base.autoneg != AUTONEG_ENABLE &&
         cmd->base.autoneg != AUTONEG_DISABLE)
         return -EINVAL;
     if (cmd->base.autoneg == AUTONEG_DISABLE &&
         ((cmd->base.speed != SPEED_100 &&
           cmd->base.speed != SPEED_10) ||
          (cmd->base.duplex != DUPLEX_HALF &&
           cmd->base.duplex != DUPLEX_FULL)))
         return -EINVAL;
 
     /* Ok, do it to it. */
     spin_lock_irq(&hp->happy_lock);
     del_timer(&hp->happy_timer);
     happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
     spin_unlock_irq(&hp->happy_lock);
 
     return 0;
 }
 
 static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     strlcpy(info->driver, "sunhme", sizeof(info->driver));
     strlcpy(info->version, "2.02", sizeof(info->version));
     if (hp->happy_flags & HFLAG_PCI) {
         struct pci_dev *pdev = hp->happy_dev;
         strlcpy(info->bus_info, pci_name(pdev), sizeof(info->bus_info));
     }
 #ifdef CONFIG_SBUS
     else {
         const struct linux_prom_registers *regs;
         struct platform_device *op = hp->happy_dev;
         regs = of_get_property(op->dev.of_node, "regs", NULL);
         if (regs)
             snprintf(info->bus_info, sizeof(info->bus_info),
                 "SBUS:%d",
                 regs->which_io);
     }
 #endif
 }
 
 static u32 hme_get_link(struct net_device *dev)
 {
     struct happy_meal *hp = netdev_priv(dev);
 
     spin_lock_irq(&hp->happy_lock);
     hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
     spin_unlock_irq(&hp->happy_lock);
 
     return hp->sw_bmsr & BMSR_LSTATUS;
 }
 
 static const struct ethtool_ops hme_ethtool_ops = {
     .get_drvinfo        = hme_get_drvinfo,
     .get_link       = hme_get_link,
     .get_link_ksettings = hme_get_link_ksettings,
     .set_link_ksettings = hme_set_link_ksettings,
 };
 
 static int hme_version_printed;
 
 #ifdef CONFIG_SBUS
 /* Given a happy meal sbus device, find it's quattro parent.
  * If none exist, allocate and return a new one.
  *
  * Return NULL on failure.
  */
 static struct quattro *quattro_sbus_find(struct platform_device *child)
 {
     struct device *parent = child->dev.parent;
     struct platform_device *op;
     struct quattro *qp;
 
     op = to_platform_device(parent);
     qp = platform_get_drvdata(op);
     if (qp)
         return qp;
 
     qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
     if (qp != NULL) {
         int i;
 
         for (i = 0; i < 4; i++)
             qp->happy_meals[i] = NULL;
 
         qp->quattro_dev = child;
         qp->next = qfe_sbus_list;
         qfe_sbus_list = qp;
 
         platform_set_drvdata(op, qp);
     }
     return qp;
 }
 
 /* After all quattro cards have been probed, we call these functions
  * to register the IRQ handlers for the cards that have been
  * successfully probed and skip the cards that failed to initialize
  */
 static int __init quattro_sbus_register_irqs(void)
 {
     struct quattro *qp;
 
     for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
         struct platform_device *op = qp->quattro_dev;
         int err, qfe_slot, skip = 0;
 
         for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
             if (!qp->happy_meals[qfe_slot])
                 skip = 1;
         }
         if (skip)
             continue;
 
         err = request_irq(op->archdata.irqs[0],
                   quattro_sbus_interrupt,
                   IRQF_SHARED, "Quattro",
                   qp);
         if (err != 0) {
             printk(KERN_ERR "Quattro HME: IRQ registration "
                    "error %d.\n", err);
             return err;
         }
     }
 
     return 0;
 }
 
 static void quattro_sbus_free_irqs(void)
 {
     struct quattro *qp;
 
     for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
         struct platform_device *op = qp->quattro_dev;
         int qfe_slot, skip = 0;
 
         for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
             if (!qp->happy_meals[qfe_slot])
                 skip = 1;
         }
         if (skip)
             continue;
 
         free_irq(op->archdata.irqs[0], qp);
     }
 }
 #endif /* CONFIG_SBUS */
 
 #ifdef CONFIG_PCI
 static struct quattro *quattro_pci_find(struct pci_dev *pdev)
 {
     struct pci_dev *bdev = pdev->bus->self;
     struct quattro *qp;
 
     if (!bdev) return NULL;
     for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
         struct pci_dev *qpdev = qp->quattro_dev;
 
         if (qpdev == bdev)
             return qp;
     }
     qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
     if (qp != NULL) {
         int i;
 
         for (i = 0; i < 4; i++)
             qp->happy_meals[i] = NULL;
 
         qp->quattro_dev = bdev;
         qp->next = qfe_pci_list;
         qfe_pci_list = qp;
 
         /* No range tricks necessary on PCI. */
         qp->nranges = 0;
     }
     return qp;
 }
 #endif /* CONFIG_PCI */
 
 static const struct net_device_ops hme_netdev_ops = {
     .ndo_open       = happy_meal_open,
     .ndo_stop       = happy_meal_close,
     .ndo_start_xmit     = happy_meal_start_xmit,
     .ndo_tx_timeout     = happy_meal_tx_timeout,
     .ndo_get_stats      = happy_meal_get_stats,
     .ndo_set_rx_mode    = happy_meal_set_multicast,
     .ndo_set_mac_address    = eth_mac_addr,
     .ndo_validate_addr  = eth_validate_addr,
 };
 
 #ifdef CONFIG_SBUS
 static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 {
     struct device_node *dp = op->dev.of_node, *sbus_dp;
     struct quattro *qp = NULL;
     struct happy_meal *hp;
     struct net_device *dev;
     int i, qfe_slot = -1;
     u8 addr[ETH_ALEN];
     int err = -ENODEV;
 
     sbus_dp = op->dev.parent->of_node;
 
     /* We can match PCI devices too, do not accept those here. */
     if (!of_node_name_eq(sbus_dp, "sbus") && !of_node_name_eq(sbus_dp, "sbi"))
         return err;
 
     if (is_qfe) {
         qp = quattro_sbus_find(op);
         if (qp == NULL)
             goto err_out;
         for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
             if (qp->happy_meals[qfe_slot] == NULL)
                 break;
         if (qfe_slot == 4)
             goto err_out;
     }
 
     err = -ENOMEM;
     dev = alloc_etherdev(sizeof(struct happy_meal));
     if (!dev)
         goto err_out;
     SET_NETDEV_DEV(dev, &op->dev);
 
     if (hme_version_printed++ == 0)
         printk(KERN_INFO "%s", version);
 
     /* If user did not specify a MAC address specifically, use
      * the Quattro local-mac-address property...
      */
     for (i = 0; i < 6; i++) {
         if (macaddr[i] != 0)
             break;
     }
     if (i < 6) { /* a mac address was given */
         for (i = 0; i < 6; i++)
             addr[i] = macaddr[i];
         eth_hw_addr_set(dev, addr);
         macaddr[5]++;
     } else {
         const unsigned char *addr;
         int len;
 
         addr = of_get_property(dp, "local-mac-address", &len);
 
         if (qfe_slot != -1 && addr && len == ETH_ALEN)
             eth_hw_addr_set(dev, addr);
         else
             eth_hw_addr_set(dev, idprom->id_ethaddr);
     }
 
     hp = netdev_priv(dev);
 
     hp->happy_dev = op;
     hp->dma_dev = &op->dev;
 
     spin_lock_init(&hp->happy_lock);
 
     err = -ENODEV;
     if (qp != NULL) {
         hp->qfe_parent = qp;
         hp->qfe_ent = qfe_slot;
         qp->happy_meals[qfe_slot] = dev;
     }
 
     hp->gregs = of_ioremap(&op->resource[0], 0,
                    GREG_REG_SIZE, "HME Global Regs");
     if (!hp->gregs) {
         printk(KERN_ERR "happymeal: Cannot map global registers.\n");
         goto err_out_free_netdev;
     }
 
     hp->etxregs = of_ioremap(&op->resource[1], 0,
                  ETX_REG_SIZE, "HME TX Regs");
     if (!hp->etxregs) {
         printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
         goto err_out_iounmap;
     }
 
     hp->erxregs = of_ioremap(&op->resource[2], 0,
                  ERX_REG_SIZE, "HME RX Regs");
     if (!hp->erxregs) {
         printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
         goto err_out_iounmap;
     }
 
     hp->bigmacregs = of_ioremap(&op->resource[3], 0,
                     BMAC_REG_SIZE, "HME BIGMAC Regs");
     if (!hp->bigmacregs) {
         printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
         goto err_out_iounmap;
     }
 
     hp->tcvregs = of_ioremap(&op->resource[4], 0,
                  TCVR_REG_SIZE, "HME Tranceiver Regs");
     if (!hp->tcvregs) {
         printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
         goto err_out_iounmap;
     }
 
     hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
     if (hp->hm_revision == 0xff)
         hp->hm_revision = 0xa0;
 
     /* Now enable the feature flags we can. */
     if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
         hp->happy_flags = HFLAG_20_21;
     else if (hp->hm_revision != 0xa0)
         hp->happy_flags = HFLAG_NOT_A0;
 
     if (qp != NULL)
         hp->happy_flags |= HFLAG_QUATTRO;
 
     /* Get the supported DVMA burst sizes from our Happy SBUS. */
     hp->happy_bursts = of_getintprop_default(sbus_dp,
                          "burst-sizes", 0x00);
 
     hp->happy_block = dma_alloc_coherent(hp->dma_dev,
                          PAGE_SIZE,
                          &hp->hblock_dvma,
                          GFP_ATOMIC);
     err = -ENOMEM;
     if (!hp->happy_block)
         goto err_out_iounmap;
 
     /* Force check of the link first time we are brought up. */
     hp->linkcheck = 0;
 
     /* Force timer state to 'asleep' with count of zero. */
     hp->timer_state = asleep;
     hp->timer_ticks = 0;
 
     timer_setup(&hp->happy_timer, happy_meal_timer, 0);
 
     hp->dev = dev;
     dev->netdev_ops = &hme_netdev_ops;
     dev->watchdog_timeo = 5*HZ;
     dev->ethtool_ops = &hme_ethtool_ops;
 
     /* Happy Meal can do it all... */
     dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
     dev->features |= dev->hw_features | NETIF_F_RXCSUM;
 
     hp->irq = op->archdata.irqs[0];
 
 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
     /* Hook up SBUS register/descriptor accessors. */
     hp->read_desc32 = sbus_hme_read_desc32;
     hp->write_txd = sbus_hme_write_txd;
     hp->write_rxd = sbus_hme_write_rxd;
     hp->read32 = sbus_hme_read32;
     hp->write32 = sbus_hme_write32;
 #endif
 
     /* Grrr, Happy Meal comes up by default not advertising
      * full duplex 100baseT capabilities, fix this.
      */
     spin_lock_irq(&hp->happy_lock);
     happy_meal_set_initial_advertisement(hp);
     spin_unlock_irq(&hp->happy_lock);
 
     err = register_netdev(hp->dev);
     if (err) {
         printk(KERN_ERR "happymeal: Cannot register net device, "
                "aborting.\n");
         goto err_out_free_coherent;
     }
 
     platform_set_drvdata(op, hp);
 
     if (qfe_slot != -1)
         printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
                dev->name, qfe_slot);
     else
         printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
                dev->name);
 
     printk("%pM\n", dev->dev_addr);
 
     return 0;
 
 err_out_free_coherent:
     dma_free_coherent(hp->dma_dev,
               PAGE_SIZE,
               hp->happy_block,
               hp->hblock_dvma);
 
 err_out_iounmap:
     if (hp->gregs)
         of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
     if (hp->etxregs)
         of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
     if (hp->erxregs)
         of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
     if (hp->bigmacregs)
         of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
     if (hp->tcvregs)
         of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
 
     if (qp)
         qp->happy_meals[qfe_slot] = NULL;
 
 err_out_free_netdev:
     free_netdev(dev);
 
 err_out:
     return err;
 }
 #endif
 
 #ifdef CONFIG_PCI
 #ifndef CONFIG_SPARC
 static int is_quattro_p(struct pci_dev *pdev)
 {
     struct pci_dev *busdev = pdev->bus->self;
     struct pci_dev *this_pdev;
     int n_hmes;
 
     if (busdev == NULL ||
         busdev->vendor != PCI_VENDOR_ID_DEC ||
         busdev->device != PCI_DEVICE_ID_DEC_21153)
         return 0;
 
     n_hmes = 0;
     list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
         if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
             this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
             n_hmes++;
     }
 
     if (n_hmes != 4)
         return 0;
 
     return 1;
 }
 
 /* Fetch MAC address from vital product data of PCI ROM. */
 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
 {
     int this_offset;
 
     for (this_offset = 0x20; this_offset < len; this_offset++) {
         void __iomem *p = rom_base + this_offset;
 
         if (readb(p + 0) != 0x90 ||
             readb(p + 1) != 0x00 ||
             readb(p + 2) != 0x09 ||
             readb(p + 3) != 0x4e ||
             readb(p + 4) != 0x41 ||
             readb(p + 5) != 0x06)
             continue;
 
         this_offset += 6;
         p += 6;
 
         if (index == 0) {
             int i;
 
             for (i = 0; i < 6; i++)
                 dev_addr[i] = readb(p + i);
             return 1;
         }
         index--;
     }
     return 0;
 }
 
 static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
 {
     size_t size;
     void __iomem *p = pci_map_rom(pdev, &size);
 
     if (p) {
         int index = 0;
         int found;
 
         if (is_quattro_p(pdev))
             index = PCI_SLOT(pdev->devfn);
 
         found = readb(p) == 0x55 &&
             readb(p + 1) == 0xaa &&
             find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
         pci_unmap_rom(pdev, p);
         if (found)
             return;
     }
 
     /* Sun MAC prefix then 3 random bytes. */
     dev_addr[0] = 0x08;
     dev_addr[1] = 0x00;
     dev_addr[2] = 0x20;
     get_random_bytes(&dev_addr[3], 3);
 }
 #endif /* !(CONFIG_SPARC) */
 
 static int happy_meal_pci_probe(struct pci_dev *pdev,
                 const struct pci_device_id *ent)
 {
     struct quattro *qp = NULL;
 #ifdef CONFIG_SPARC
     struct device_node *dp;
 #endif
     struct happy_meal *hp;
     struct net_device *dev;
     void __iomem *hpreg_base;
     unsigned long hpreg_res;
     int i, qfe_slot = -1;
     char prom_name[64];
     u8 addr[ETH_ALEN];
     int err;
 
     /* Now make sure pci_dev cookie is there. */
 #ifdef CONFIG_SPARC
     dp = pci_device_to_OF_node(pdev);
     snprintf(prom_name, sizeof(prom_name), "%pOFn", dp);
 #else
     if (is_quattro_p(pdev))
         strcpy(prom_name, "SUNW,qfe");
     else
         strcpy(prom_name, "SUNW,hme");
 #endif
 
     err = -ENODEV;
 
     if (pci_enable_device(pdev))
         goto err_out;
     pci_set_master(pdev);
 
     if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
         qp = quattro_pci_find(pdev);
         if (qp == NULL)
             goto err_out;
         for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
             if (qp->happy_meals[qfe_slot] == NULL)
                 break;
         if (qfe_slot == 4)
             goto err_out;
     }
 
     dev = alloc_etherdev(sizeof(struct happy_meal));
     err = -ENOMEM;
     if (!dev)
         goto err_out;
     SET_NETDEV_DEV(dev, &pdev->dev);
 
     if (hme_version_printed++ == 0)
         printk(KERN_INFO "%s", version);
 
     hp = netdev_priv(dev);
 
     hp->happy_dev = pdev;
     hp->dma_dev = &pdev->dev;
 
     spin_lock_init(&hp->happy_lock);
 
     if (qp != NULL) {
         hp->qfe_parent = qp;
         hp->qfe_ent = qfe_slot;
         qp->happy_meals[qfe_slot] = dev;
     }
 
     hpreg_res = pci_resource_start(pdev, 0);
     err = -ENODEV;
     if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
         printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
         goto err_out_clear_quattro;
     }
     if (pci_request_regions(pdev, DRV_NAME)) {
         printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
                "aborting.\n");
         goto err_out_clear_quattro;
     }
 
     if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
         printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
         goto err_out_free_res;
     }
 
     for (i = 0; i < 6; i++) {
         if (macaddr[i] != 0)
             break;
     }
     if (i < 6) { /* a mac address was given */
         for (i = 0; i < 6; i++)
             addr[i] = macaddr[i];
         eth_hw_addr_set(dev, addr);
         macaddr[5]++;
     } else {
 #ifdef CONFIG_SPARC
         const unsigned char *addr;
         int len;
 
         if (qfe_slot != -1 &&
             (addr = of_get_property(dp, "local-mac-address", &len))
             != NULL &&
             len == 6) {
             eth_hw_addr_set(dev, addr);
         } else {
             eth_hw_addr_set(dev, idprom->id_ethaddr);
         }
 #else
         u8 addr[ETH_ALEN];
 
         get_hme_mac_nonsparc(pdev, addr);
         eth_hw_addr_set(dev, addr);
 #endif
     }
 
     /* Layout registers. */
     hp->gregs      = (hpreg_base + 0x0000UL);
     hp->etxregs    = (hpreg_base + 0x2000UL);
     hp->erxregs    = (hpreg_base + 0x4000UL);
     hp->bigmacregs = (hpreg_base + 0x6000UL);
     hp->tcvregs    = (hpreg_base + 0x7000UL);
 
 #ifdef CONFIG_SPARC
     hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
     if (hp->hm_revision == 0xff)
         hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
 #else
     /* works with this on non-sparc hosts */
     hp->hm_revision = 0x20;
 #endif
 
     /* Now enable the feature flags we can. */
     if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
         hp->happy_flags = HFLAG_20_21;
     else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
         hp->happy_flags = HFLAG_NOT_A0;
 
     if (qp != NULL)
         hp->happy_flags |= HFLAG_QUATTRO;
 
     /* And of course, indicate this is PCI. */
     hp->happy_flags |= HFLAG_PCI;
 
 #ifdef CONFIG_SPARC
     /* Assume PCI happy meals can handle all burst sizes. */
     hp->happy_bursts = DMA_BURSTBITS;
 #endif
 
     hp->happy_block = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
                          &hp->hblock_dvma, GFP_KERNEL);
     err = -ENODEV;
     if (!hp->happy_block)
         goto err_out_iounmap;
 
     hp->linkcheck = 0;
     hp->timer_state = asleep;
     hp->timer_ticks = 0;
 
     timer_setup(&hp->happy_timer, happy_meal_timer, 0);
 
     hp->irq = pdev->irq;
     hp->dev = dev;
     dev->netdev_ops = &hme_netdev_ops;
     dev->watchdog_timeo = 5*HZ;
     dev->ethtool_ops = &hme_ethtool_ops;
 
     /* Happy Meal can do it all... */
     dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
     dev->features |= dev->hw_features | NETIF_F_RXCSUM;
 
 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
     /* Hook up PCI register/descriptor accessors. */
     hp->read_desc32 = pci_hme_read_desc32;
     hp->write_txd = pci_hme_write_txd;
     hp->write_rxd = pci_hme_write_rxd;
     hp->read32 = pci_hme_read32;
     hp->write32 = pci_hme_write32;
 #endif
 
     /* Grrr, Happy Meal comes up by default not advertising
      * full duplex 100baseT capabilities, fix this.
      */
     spin_lock_irq(&hp->happy_lock);
     happy_meal_set_initial_advertisement(hp);
     spin_unlock_irq(&hp->happy_lock);
 
     err = register_netdev(hp->dev);
     if (err) {
         printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
                "aborting.\n");
         goto err_out_free_coherent;
     }
 
     pci_set_drvdata(pdev, hp);
 
     if (!qfe_slot) {
         struct pci_dev *qpdev = qp->quattro_dev;
 
         prom_name[0] = 0;
         if (!strncmp(dev->name, "eth", 3)) {
             int i = simple_strtoul(dev->name + 3, NULL, 10);
             sprintf(prom_name, "-%d", i + 3);
         }
         printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
         if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
             qpdev->device == PCI_DEVICE_ID_DEC_21153)
             printk("DEC 21153 PCI Bridge\n");
         else
             printk("unknown bridge %04x.%04x\n",
                 qpdev->vendor, qpdev->device);
     }
 
     if (qfe_slot != -1)
         printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
                dev->name, qfe_slot);
     else
         printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
                dev->name);
 
     printk("%pM\n", dev->dev_addr);
 
     return 0;
 
 err_out_free_coherent:
     dma_free_coherent(hp->dma_dev, PAGE_SIZE,
               hp->happy_block, hp->hblock_dvma);
 
 err_out_iounmap:
     iounmap(hp->gregs);
 
 err_out_free_res:
     pci_release_regions(pdev);
 
 err_out_clear_quattro:
     if (qp != NULL)
         qp->happy_meals[qfe_slot] = NULL;
 
     free_netdev(dev);
 
 err_out:
     return err;
 }
 
 static void happy_meal_pci_remove(struct pci_dev *pdev)
 {
     struct happy_meal *hp = pci_get_drvdata(pdev);
     struct net_device *net_dev = hp->dev;
 
     unregister_netdev(net_dev);
 
     dma_free_coherent(hp->dma_dev, PAGE_SIZE,
               hp->happy_block, hp->hblock_dvma);
     iounmap(hp->gregs);
     pci_release_regions(hp->happy_dev);
 
     free_netdev(net_dev);
 }
 
 static const struct pci_device_id happymeal_pci_ids[] = {
     { PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
     { }         /* Terminating entry */
 };
 
 MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
 
 static struct pci_driver hme_pci_driver = {
     .name       = "hme",
     .id_table   = happymeal_pci_ids,
     .probe      = happy_meal_pci_probe,
     .remove     = happy_meal_pci_remove,
 };
 
 static int __init happy_meal_pci_init(void)
 {
     return pci_register_driver(&hme_pci_driver);
 }
 
 static void happy_meal_pci_exit(void)
 {
     pci_unregister_driver(&hme_pci_driver);
 
     while (qfe_pci_list) {
         struct quattro *qfe = qfe_pci_list;
         struct quattro *next = qfe->next;
 
         kfree(qfe);
 
         qfe_pci_list = next;
     }
 }
 
 #endif
 
 #ifdef CONFIG_SBUS
 static const struct of_device_id hme_sbus_match[];
 static int hme_sbus_probe(struct platform_device *op)
 {
     const struct of_device_id *match;
     struct device_node *dp = op->dev.of_node;
     const char *model = of_get_property(dp, "model", NULL);
     int is_qfe;
 
     match = of_match_device(hme_sbus_match, &op->dev);
     if (!match)
         return -EINVAL;
     is_qfe = (match->data != NULL);
 
     if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
         is_qfe = 1;
 
     return happy_meal_sbus_probe_one(op, is_qfe);
 }
 
 static int hme_sbus_remove(struct platform_device *op)
 {
     struct happy_meal *hp = platform_get_drvdata(op);
     struct net_device *net_dev = hp->dev;
 
     unregister_netdev(net_dev);
 
     /* XXX qfe parent interrupt... */
 
     of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
     of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
     of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
     of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
     of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
     dma_free_coherent(hp->dma_dev,
               PAGE_SIZE,
               hp->happy_block,
               hp->hblock_dvma);
 
     free_netdev(net_dev);
 
     return 0;
 }
 
 static const struct of_device_id hme_sbus_match[] = {
     {
         .name = "SUNW,hme",
     },
     {
         .name = "SUNW,qfe",
         .data = (void *) 1,
     },
     {
         .name = "qfe",
         .data = (void *) 1,
     },
     {},
 };
 
 MODULE_DEVICE_TABLE(of, hme_sbus_match);
 
 static struct platform_driver hme_sbus_driver = {
     .driver = {
         .name = "hme",
         .of_match_table = hme_sbus_match,
     },
     .probe      = hme_sbus_probe,
     .remove     = hme_sbus_remove,
 };
 
 static int __init happy_meal_sbus_init(void)
 {
     int err;
 
     err = platform_driver_register(&hme_sbus_driver);
     if (!err)
         err = quattro_sbus_register_irqs();
 
     return err;
 }
 
 static void happy_meal_sbus_exit(void)
 {
     platform_driver_unregister(&hme_sbus_driver);
     quattro_sbus_free_irqs();
 
     while (qfe_sbus_list) {
         struct quattro *qfe = qfe_sbus_list;
         struct quattro *next = qfe->next;
 
         kfree(qfe);
 
         qfe_sbus_list = next;
     }
 }
 #endif
 
 static int __init happy_meal_probe(void)
 {
     int err = 0;
 
 #ifdef CONFIG_SBUS
     err = happy_meal_sbus_init();
 #endif
 #ifdef CONFIG_PCI
     if (!err) {
         err = happy_meal_pci_init();
 #ifdef CONFIG_SBUS
         if (err)
             happy_meal_sbus_exit();
 #endif
     }
 #endif
 
     return err;
 }
 
 
 static void __exit happy_meal_exit(void)
 {
 #ifdef CONFIG_SBUS
     happy_meal_sbus_exit();
 #endif
 #ifdef CONFIG_PCI
     happy_meal_pci_exit();
 #endif
 }
 
 module_init(happy_meal_probe);
 module_exit(happy_meal_exit);