Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2898 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
new file mode 100644
index 0000000000..b983b9c23b
--- /dev/null
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -0,0 +1,2898 @@
+// 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/bitops.h>
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_SPARC
+#include <asm/auxio.h>
+#include <asm/idprom.h>
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/prom.h>
+#endif
+
+#include "sunhme.h"
+
+#define DRV_NAME	"sunhme"
+
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+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
+
+#define hme_debug(fmt, ...) pr_debug("%s: " fmt, __func__, ##__VA_ARGS__)
+#define HMD hme_debug
+
+/* "Auto Switch Debug" aka phy debug */
+#if 1
+#define ASD hme_debug
+#else
+#define ASD(...)
+#endif
+
+#if 0
+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++) {
+		pr_err("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);
+	}
+}
+#else
+#define tx_add_log(hp, a, s)
+#define tx_dump_log()
+#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;
+
+	/* 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("reg=%d value=%x\n", reg, 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("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;
+
+	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) {
+		netdev_err(hp->dev, "Aieee, transceiver MIF read bolixed\n");
+		return TCVR_FAILURE;
+	}
+	retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
+	ASD("reg=0x%02x value=%04x\n", reg, 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("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)
+		netdev_err(hp->dev, "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 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;
+}
+
+/* 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.
+		 */
+
+		ASD("Advertising [ %s%s%s%s]\n",
+		    hp->sw_advertise & ADVERTISE_10HALF ? "10H " : "",
+		    hp->sw_advertise & ADVERTISE_10FULL ? "10F " : "",
+		    hp->sw_advertise & ADVERTISE_100HALF ? "100H " : "",
+		    hp->sw_advertise & ADVERTISE_100FULL ? "100F " : "");
+
+		/* 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) {
+			netdev_err(hp->dev,
+				   "Happy Meal would not start auto negotiation BMCR=0x%04x\n",
+				   hp->sw_bmcr);
+			netdev_notice(hp->dev,
+				      "Performing force link detection.\n");
+			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);
+}
+
+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);
+			netdev_notice(hp->dev,
+				      "Auto-Negotiation unsuccessful, trying force link mode\n");
+			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) {
+				netdev_notice(hp->dev,
+					      "Auto negotiation successful, link still not completely up.\n");
+				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... */
+					netdev_notice(hp->dev,
+						      "Link down, cable problem?\n");
+
+					happy_meal_begin_auto_negotiation(hp, tregs, NULL);
+					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.... */
+		netdev_err(hp->dev,
+			   "Aieee, link timer is asleep but we got one anyways!\n");
+		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("reset...\n");
+
+	/* 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)
+		netdev_err(hp->dev, "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("reset...\n");
+
+	/* 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)
+		netdev_err(hp->dev, "Receiver BigMac ATTACK!\n");
+
+	/* 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("reset...\n");
+
+	/* 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)
+		netdev_err(hp->dev, "Fry guys.\n");
+
+	/* 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);
+}
+
+/* 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("tcfg=%08x\n", tconfig);
+	if (hp->tcvr_type == external) {
+		hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
+		hp->tcvr_type = internal;
+		hp->paddr = TCV_PADDR_ITX;
+		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("external: ISOLATE, phyread_ok, PSELECT\n");
+		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) {
+			hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
+			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("internal: PSELECT, ISOLATE, phyread_ok, ~PSELECT\n");
+			hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
+			hp->tcvr_type = internal;
+			hp->paddr = TCV_PADDR_ITX;
+		}
+	}
+
+	ASD("BMCR_RESET...\n");
+	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...\n");
+	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("UNISOLATE 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);
+	u32 reread = hme_read32(hp, tregs + TCVR_CFG);
+
+	ASD("tcfg=%08lx\n", tconfig);
+	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("not polling, 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("not polling, internal\n");
+		} else {
+			netdev_err(hp->dev,
+				   "Transceiver and a coke please.");
+			hp->tcvr_type = none; /* Grrr... */
+			ASD("not polling, 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("counters to zero\n");
+	hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
+
+	/* Free any skippy bufs left around in the rings. */
+	happy_meal_clean_rings(hp);
+
+	/* Now get new skippy bufs for the receive ring. */
+	HMD("init rxring\n");
+	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\n");
+	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 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;
+	const char *bursts = "64";
+	u32 regtmp, rxcfg;
+
+	/* If auto-negotiation timer is running, kill it. */
+	del_timer(&hp->happy_timer);
+
+	HMD("happy_flags[%08x]\n", hp->happy_flags);
+	if (!(hp->happy_flags & HFLAG_INIT)) {
+		HMD("set HFLAG_INIT\n");
+		hp->happy_flags |= HFLAG_INIT;
+		happy_meal_get_counters(hp, bregs);
+	}
+
+	/* Stop transmitter and receiver. */
+	HMD("to happy_meal_stop\n");
+	happy_meal_stop(hp, gregs);
+
+	/* Alloc and reset the tx/rx descriptor chains. */
+	HMD("to happy_meal_init_rings\n");
+	happy_meal_init_rings(hp);
+
+	/* 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]\n",
+		    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]\n",
+		    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. */
+	switch(hp->tcvr_type) {
+	case none:
+		/* Cannot operate if we don't know the transceiver type! */
+		HMD("AAIEEE no transceiver type, EAGAIN\n");
+		return -EAGAIN;
+
+	case internal:
+		/* Using the MII buffers. */
+		HMD("internal, using MII\n");
+		hme_write32(hp, bregs + BMAC_XIFCFG, 0);
+		break;
+
+	case external:
+		/* Not using the MII, disable it. */
+		HMD("external, disable MII\n");
+		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\n");
+	happy_meal_tx_reset(hp, bregs);
+	happy_meal_rx_reset(hp, bregs);
+
+	/* Set jam size and inter-packet gaps to reasonable defaults. */
+	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. */
+
+	/* 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]));
+
+	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. */
+#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
+
+		bursts = "64";
+		hme_write32(hp, gregs + GREG_CFG, gcfg);
+	} else if (hp->happy_bursts & DMA_BURST32) {
+		bursts = "32";
+		hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
+	} else if (hp->happy_bursts & DMA_BURST16) {
+		bursts = "16";
+		hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
+	} else {
+		bursts = "XXX";
+		hme_write32(hp, gregs + GREG_CFG, 0);
+	}
+#endif /* CONFIG_SPARC */
+
+	HMD("old[%08x] bursts<%s>\n",
+	    hme_read32(hp, gregs + GREG_CFG), bursts);
+
+	/* Turn off interrupts we do not want to hear. */
+	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]\n", (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]\n", 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)) {
+		netdev_err(hp->dev,
+			   "Eieee, rx config register gets greasy fries.\n");
+		netdev_err(hp->dev,
+			   "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("enable hash rx_cfg_old[%08x]\n",
+	    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\n");
+	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]\n", 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);
+	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))
+		netdev_err(hp->dev,
+			   "Error interrupt for happy meal, status = %08x\n",
+			   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. */
+		netdev_dbg(hp->dev, "Happy Meal receive FIFO overflow.\n");
+	}
+
+	if (status & GREG_STAT_STSTERR) {
+		/* BigMAC SQE link test failed. */
+		netdev_err(hp->dev, "Happy Meal BigMAC SQE test failed.\n");
+		reset = 1;
+	}
+
+	if (status & GREG_STAT_TFIFO_UND) {
+		/* Transmit FIFO underrun, again DMA error likely. */
+		netdev_err(hp->dev,
+			   "Happy Meal transmitter FIFO underrun, DMA error.\n");
+		reset = 1;
+	}
+
+	if (status & GREG_STAT_MAXPKTERR) {
+		/* Driver error, tried to transmit something larger
+		 * than ethernet max mtu.
+		 */
+		netdev_err(hp->dev, "Happy Meal MAX Packet size error.\n");
+		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.
+		 */
+		netdev_info(hp->dev,
+			    "Happy Meal out of receive descriptors, packet dropped.\n");
+	}
+
+	if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
+		/* All sorts of DMA receive errors. */
+		netdev_err(hp->dev, "Happy Meal rx DMA errors [ %s%s%s]\n",
+			   status & GREG_STAT_RXERR ? "GenericError " : "",
+			   status & GREG_STAT_RXPERR ? "ParityError " : "",
+			   status & GREG_STAT_RXTERR ? "RxTagBotch " : "");
+		reset = 1;
+	}
+
+	if (status & GREG_STAT_EOPERR) {
+		/* Driver bug, didn't set EOP bit in tx descriptor given
+		 * to the happy meal.
+		 */
+		netdev_err(hp->dev,
+			   "EOP not set in happy meal transmit descriptor!\n");
+		reset = 1;
+	}
+
+	if (status & GREG_STAT_MIFIRQ) {
+		/* MIF signalled an interrupt, were we polling it? */
+		netdev_err(hp->dev, "Happy Meal MIF interrupt.\n");
+	}
+
+	if (status &
+	    (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
+		/* All sorts of transmit DMA errors. */
+		netdev_err(hp->dev, "Happy Meal tx DMA errors [ %s%s%s%s]\n",
+			   status & GREG_STAT_TXEACK ? "GenericError " : "",
+			   status & GREG_STAT_TXLERR ? "LateError " : "",
+			   status & GREG_STAT_TXPERR ? "ParityError " : "",
+			   status & GREG_STAT_TXTERR ? "TagBotch " : "");
+		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.
+		 */
+		netdev_err(hp->dev,
+			   "Happy Meal register access SBUS slave (%s) error.\n",
+			   (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
+		reset = 1;
+	}
+
+	if (reset) {
+		netdev_notice(hp->dev, "Resetting...\n");
+		happy_meal_init(hp);
+		return 1;
+	}
+	return 0;
+}
+
+/* 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;
+	while (elem != hp->tx_new) {
+		struct sk_buff *skb;
+		u32 flags, dma_addr, dma_len;
+		int frag;
+
+		netdev_vdbg(hp->dev, "TX[%d]\n", 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;
+
+	if (netif_queue_stopped(dev) &&
+	    TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
+		netif_wake_queue(dev);
+}
+
+/* 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;
+
+	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);
+
+		/* Check for errors. */
+		if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
+			netdev_vdbg(dev, "RX[%d ERR(%08x)]", elem, 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;
+
+		netdev_vdbg(dev, "RX[%d len=%d csum=%4x]", elem, 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)
+		netdev_info(hp->dev, "Memory squeeze, deferring packet.\n");
+}
+
+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("status=%08x\n", happy_status);
+	if (!happy_status)
+		return IRQ_NONE;
+
+	spin_lock(&hp->happy_lock);
+
+	if (happy_status & GREG_STAT_ERRORS) {
+		if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
+			goto out;
+	}
+
+	if (happy_status & GREG_STAT_TXALL)
+		happy_meal_tx(hp);
+
+	if (happy_status & GREG_STAT_RXTOHOST)
+		happy_meal_rx(hp, dev);
+
+	HMD("done\n");
+out:
+	spin_unlock(&hp->happy_lock);
+
+	return IRQ_HANDLED;
+}
+
+static int happy_meal_open(struct net_device *dev)
+{
+	struct happy_meal *hp = netdev_priv(dev);
+	int res;
+
+	res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
+			  dev->name, dev);
+	if (res) {
+		netdev_err(dev, "Can't order irq %d to go.\n", hp->irq);
+		return res;
+	}
+
+	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)
+		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);
+
+	free_irq(hp->irq, dev);
+
+	return 0;
+}
+
+static void happy_meal_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+	struct happy_meal *hp = netdev_priv(dev);
+
+	netdev_err(dev, "transmit timed out, resetting\n");
+	tx_dump_log();
+	netdev_err(dev, "Happy Status %08x TX[%08x:%08x]\n",
+		   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);
+		netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
+		return NETDEV_TX_BUSY;
+	}
+
+	entry = hp->tx_new;
+	netdev_vdbg(dev, "SX<l[%d]e[%d]>\n", skb->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);
+
+	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
+	if (hp->happy_flags & HFLAG_PCI) {
+		struct pci_dev *pdev = hp->happy_dev;
+		strscpy(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,
+};
+
+#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 = kzalloc(sizeof(*qp), GFP_KERNEL);
+	if (!qp)
+		return NULL;
+
+	qp->quattro_dev = child;
+	qp->next = qfe_sbus_list;
+	qfe_sbus_list = qp;
+
+	platform_set_drvdata(op, qp);
+	return qp;
+}
+#endif /* CONFIG_SBUS */
+
+#ifdef CONFIG_PCI
+static struct quattro *quattro_pci_find(struct pci_dev *pdev)
+{
+	int i;
+	struct pci_dev *bdev = pdev->bus->self;
+	struct quattro *qp;
+
+	if (!bdev)
+		return ERR_PTR(-ENODEV);
+
+	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)
+		return ERR_PTR(-ENOMEM);
+
+	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_PCI
+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 || 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) {
+			for (int i = 0; i < 6; i++)
+				dev_addr[i] = readb(p + i);
+			return 1;
+		}
+		index--;
+	}
+	return 0;
+}
+
+static void __maybe_unused get_hme_mac_nonsparc(struct pci_dev *pdev,
+						unsigned char *dev_addr)
+{
+	void __iomem *p;
+	size_t size;
+
+	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
+
+static void happy_meal_addr_init(struct happy_meal *hp,
+				 struct device_node *dp, int qfe_slot)
+{
+	int i;
+
+	for (i = 0; i < 6; i++) {
+		if (macaddr[i] != 0)
+			break;
+	}
+
+	if (i < 6) { /* a mac address was given */
+		u8 addr[ETH_ALEN];
+
+		for (i = 0; i < 6; i++)
+			addr[i] = macaddr[i];
+		eth_hw_addr_set(hp->dev, addr);
+		macaddr[5]++;
+	} else {
+#ifdef CONFIG_SPARC
+		const unsigned char *addr;
+		int len;
+
+		/* If user did not specify a MAC address specifically, use
+		 * the Quattro local-mac-address property...
+		 */
+		if (qfe_slot != -1) {
+			addr = of_get_property(dp, "local-mac-address", &len);
+			if (addr && len == 6) {
+				eth_hw_addr_set(hp->dev, addr);
+				return;
+			}
+		}
+
+		eth_hw_addr_set(hp->dev, idprom->id_ethaddr);
+#else
+		u8 addr[ETH_ALEN];
+
+		get_hme_mac_nonsparc(hp->happy_dev, addr);
+		eth_hw_addr_set(hp->dev, addr);
+#endif
+	}
+}
+
+static int happy_meal_common_probe(struct happy_meal *hp,
+				   struct device_node *dp)
+{
+	struct net_device *dev = hp->dev;
+	int err;
+
+#ifdef CONFIG_SPARC
+	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
+#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->happy_flags |= HFLAG_NOT_A0;
+
+	hp->happy_block = dmam_alloc_coherent(hp->dma_dev, PAGE_SIZE,
+					      &hp->hblock_dvma, GFP_KERNEL);
+	if (!hp->happy_block)
+		return -ENOMEM;
+
+	/* 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);
+
+	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;
+
+
+	/* 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 = devm_register_netdev(hp->dma_dev, dev);
+	if (err)
+		dev_err(hp->dma_dev, "Cannot register net device, aborting.\n");
+	return err;
+}
+
+#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 qfe_slot = -1;
+	int err;
+
+	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 -ENODEV;
+
+	if (is_qfe) {
+		qp = quattro_sbus_find(op);
+		if (qp == NULL)
+			return -ENODEV;
+		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
+			if (qp->happy_meals[qfe_slot] == NULL)
+				break;
+		if (qfe_slot == 4)
+			return -ENODEV;
+	}
+
+	dev = devm_alloc_etherdev(&op->dev, sizeof(struct happy_meal));
+	if (!dev)
+		return -ENOMEM;
+	SET_NETDEV_DEV(dev, &op->dev);
+
+	hp = netdev_priv(dev);
+	hp->dev = dev;
+	hp->happy_dev = op;
+	hp->dma_dev = &op->dev;
+	happy_meal_addr_init(hp, dp, qfe_slot);
+
+	spin_lock_init(&hp->happy_lock);
+
+	if (qp != NULL) {
+		hp->qfe_parent = qp;
+		hp->qfe_ent = qfe_slot;
+		qp->happy_meals[qfe_slot] = dev;
+	}
+
+	hp->gregs = devm_platform_ioremap_resource(op, 0);
+	if (IS_ERR(hp->gregs)) {
+		dev_err(&op->dev, "Cannot map global registers.\n");
+		err = PTR_ERR(hp->gregs);
+		goto err_out_clear_quattro;
+	}
+
+	hp->etxregs = devm_platform_ioremap_resource(op, 1);
+	if (IS_ERR(hp->etxregs)) {
+		dev_err(&op->dev, "Cannot map MAC TX registers.\n");
+		err = PTR_ERR(hp->etxregs);
+		goto err_out_clear_quattro;
+	}
+
+	hp->erxregs = devm_platform_ioremap_resource(op, 2);
+	if (IS_ERR(hp->erxregs)) {
+		dev_err(&op->dev, "Cannot map MAC RX registers.\n");
+		err = PTR_ERR(hp->erxregs);
+		goto err_out_clear_quattro;
+	}
+
+	hp->bigmacregs = devm_platform_ioremap_resource(op, 3);
+	if (IS_ERR(hp->bigmacregs)) {
+		dev_err(&op->dev, "Cannot map BIGMAC registers.\n");
+		err = PTR_ERR(hp->bigmacregs);
+		goto err_out_clear_quattro;
+	}
+
+	hp->tcvregs = devm_platform_ioremap_resource(op, 4);
+	if (IS_ERR(hp->tcvregs)) {
+		dev_err(&op->dev, "Cannot map TCVR registers.\n");
+		err = PTR_ERR(hp->tcvregs);
+		goto err_out_clear_quattro;
+	}
+
+	hp->hm_revision = 0xa0;
+
+	if (qp != NULL)
+		hp->happy_flags |= HFLAG_QUATTRO;
+
+	hp->irq = op->archdata.irqs[0];
+
+	/* Get the supported DVMA burst sizes from our Happy SBUS. */
+	hp->happy_bursts = of_getintprop_default(sbus_dp,
+						 "burst-sizes", 0x00);
+
+#ifdef 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
+
+	err = happy_meal_common_probe(hp, dp);
+	if (err)
+		goto err_out_clear_quattro;
+
+	platform_set_drvdata(op, hp);
+
+	if (qfe_slot != -1)
+		netdev_info(dev,
+			    "Quattro HME slot %d (SBUS) 10/100baseT Ethernet %pM\n",
+			    qfe_slot, dev->dev_addr);
+	else
+		netdev_info(dev, "HAPPY MEAL (SBUS) 10/100baseT Ethernet %pM\n",
+			    dev->dev_addr);
+
+	return 0;
+
+err_out_clear_quattro:
+	if (qp)
+		qp->happy_meals[qfe_slot] = NULL;
+	return err;
+}
+#endif
+
+#ifdef CONFIG_PCI
+static int happy_meal_pci_probe(struct pci_dev *pdev,
+				const struct pci_device_id *ent)
+{
+	struct device_node *dp = NULL;
+	struct quattro *qp = NULL;
+	struct happy_meal *hp;
+	struct net_device *dev;
+	void __iomem *hpreg_base;
+	struct resource *hpreg_res;
+	char prom_name[64];
+	int qfe_slot = -1;
+	int err = -ENODEV;
+
+	/* 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 = pcim_enable_device(pdev);
+	if (err)
+		return err;
+	pci_set_master(pdev);
+
+	if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
+		qp = quattro_pci_find(pdev);
+		if (IS_ERR(qp))
+			return PTR_ERR(qp);
+
+		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
+			if (!qp->happy_meals[qfe_slot])
+				break;
+
+		if (qfe_slot == 4)
+			return -ENODEV;
+	}
+
+	dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct happy_meal));
+	if (!dev)
+		return -ENOMEM;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	hp = netdev_priv(dev);
+	hp->dev = 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;
+	}
+
+	err = -EINVAL;
+	if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
+		dev_err(&pdev->dev,
+			"Cannot find proper PCI device base address.\n");
+		goto err_out_clear_quattro;
+	}
+
+	hpreg_res = devm_request_mem_region(&pdev->dev,
+					    pci_resource_start(pdev, 0),
+					    pci_resource_len(pdev, 0),
+					    DRV_NAME);
+	if (!hpreg_res) {
+		err = -EBUSY;
+		dev_err(&pdev->dev, "Cannot obtain PCI resources, aborting.\n");
+		goto err_out_clear_quattro;
+	}
+
+	hpreg_base = pcim_iomap(pdev, 0, 0x8000);
+	if (!hpreg_base) {
+		err = -ENOMEM;
+		dev_err(&pdev->dev, "Unable to remap card memory.\n");
+		goto err_out_clear_quattro;
+	}
+
+	happy_meal_addr_init(hp, dp, qfe_slot);
+
+	/* 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);
+
+	if (IS_ENABLED(CONFIG_SPARC))
+		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
+	else
+		hp->hm_revision = 0x20;
+
+	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->irq = pdev->irq;
+
+#ifdef CONFIG_SBUS
+	/* 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
+
+	err = happy_meal_common_probe(hp, dp);
+	if (err)
+		goto err_out_clear_quattro;
+
+	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);
+		}
+		netdev_info(dev,
+			    "%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet bridge %04x.%04x\n",
+			    prom_name, qpdev->vendor, qpdev->device);
+	}
+
+	if (qfe_slot != -1)
+		netdev_info(dev,
+			    "Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet %pM\n",
+			    qfe_slot, dev->dev_addr);
+	else
+		netdev_info(dev,
+			    "HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet %pM\n",
+			    dev->dev_addr);
+
+	return 0;
+
+err_out_clear_quattro:
+	if (qp != NULL)
+		qp->happy_meals[qfe_slot] = NULL;
+	return err;
+}
+
+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,
+};
+
+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 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,
+};
+
+static int __init happy_meal_sbus_init(void)
+{
+	return platform_driver_register(&hme_sbus_driver);
+}
+
+static void happy_meal_sbus_exit(void)
+{
+	platform_driver_unregister(&hme_sbus_driver);
+
+	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);