sunhme.c

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		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, DP83840_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, DP83840_BMCR, hp->sw_bmcr);

		/* Restart it to make sure it is going. */
		hp->sw_bmcr |= BMCR_ANRESTART;
		happy_meal_tcvr_write(hp, tregs, DP83840_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, DP83840_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 == NULL || ep->autoneg == AUTONEG_ENABLE) {
			hp->sw_bmcr = BMCR_SPEED100;
		} else {
			if (ep->speed == SPEED_100)
				hp->sw_bmcr = BMCR_SPEED100;
			else
				hp->sw_bmcr = 0;
			if (ep->duplex == DUPLEX_FULL)
				hp->sw_bmcr |= BMCR_FULLDPLX;
		}
		happy_meal_tcvr_write(hp, tregs, DP83840_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. */
	hp->happy_timer.data = (unsigned long) hp;
	hp->happy_timer.function = &happy_meal_timer;
	add_timer(&hp->happy_timer);
}

#define CRC_POLYNOMIAL_BE 0x04c11db7UL  /* Ethernet CRC, big endian */
#define CRC_POLYNOMIAL_LE 0xedb88320UL  /* Ethernet CRC, little endian */

static int happy_meal_init(struct happy_meal *hp, int from_irq)
{
	unsigned long gregs        = hp->gregs;
	unsigned long etxregs      = hp->etxregs;
	unsigned long erxregs      = hp->erxregs;
	unsigned long bregs        = hp->bigmacregs;
	unsigned long tregs        = hp->tcvregs;
	u32 regtmp, rxcfg;
	unsigned char *e = &hp->dev->dev_addr[0];

	/* 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, from_irq);

	/* 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) ||
	    (hp->dev->mc_count > 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 dev_mc_list *dmi = hp->dev->mc_list;
		char *addrs;
		int i, j, bit, byte;
		u32 crc, poly = CRC_POLYNOMIAL_LE;

		for (i = 0; i < 4; i++)
			hash_table[i] = 0;

		for (i = 0; i < hp->dev->mc_count; i++) {
			addrs = dmi->dmi_addr;
			dmi = dmi->next;

			if (!(*addrs & 1))
				continue;

			crc = 0xffffffffU;
			for (byte = 0; byte < 6; byte++) {
				for (bit = *addrs++, j = 0; j < 8; j++, bit >>= 1) {
					int test;

					test = ((bit ^ crc) & 0x01);
					crc >>= 1;
					if (test)
						crc = crc ^ poly;
				}
			}
			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",
	     (hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
	     (hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
	hme_write32(hp, erxregs + ERX_RING,
		    (hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
	hme_write32(hp, etxregs + ETX_RING,
		    (hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));

	/* Set the supported burst sizes. */
	HMD(("happy_meal_init: old[%08x] bursts<",
	     hme_read32(hp, gregs + GREG_CFG)));

#ifndef __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(hp->happy_dev)
#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 &&
		    sbus_can_dma_64bit(hp->happy_dev)) {
			sbus_set_sbus64(hp->happy_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 /* __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 it's 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;
	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;
	hme_write32(hp, bregs + BMAC_TXCFG, regtmp | BIGMAC_TXCFG_DGIVEUP);

	/* 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)));
	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;
}

static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
{
	unsigned long tregs	= hp->tcvregs;
	unsigned long bregs	= hp->bigmacregs;
	unsigned long 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, DP83840_BMSR);
	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, DP83840_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, DP83840_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.