media.c

LINUX 2.6.17.4的源码

				for (i = 0; i < init_length; i++)
					iowrite32(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
			} else {
				u8 *init_sequence = p + 2;
				u8 *reset_sequence = p + 3 + init_length;
				int reset_length = p[2 + init_length];
				misc_info = (u16*)(reset_sequence + reset_length);
				if (startup) {
					iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
					for (i = 0; i < reset_length; i++)
						iowrite32(reset_sequence[i], ioaddr + CSR12);
				}
				for (i = 0; i < init_length; i++)
					iowrite32(init_sequence[i], ioaddr + CSR12);
			}
			tmp_info = get_u16(&misc_info[1]);
			if (tmp_info)
				tp->advertising[phy_num] = tmp_info | 1;
			if (tmp_info && startup < 2) {
				if (tp->mii_advertise == 0)
					tp->mii_advertise = tp->advertising[phy_num];
				if (tulip_debug > 1)
					printk(KERN_DEBUG "%s:  Advertising %4.4x on MII %d.\n",
					       dev->name, tp->mii_advertise, tp->phys[phy_num]);
				tulip_mdio_write(dev, tp->phys[phy_num], 4, tp->mii_advertise);
			}
			break;
		}
		case 5: case 6: {
			u16 setup[5];

			new_csr6 = 0; /* FIXME */

			for (i = 0; i < 5; i++)
				setup[i] = get_u16(&p[i*2 + 1]);

			if (startup && mtable->has_reset) {
				struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
				unsigned char *rst = rleaf->leafdata;
				if (tulip_debug > 1)
					printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
						   dev->name);
				for (i = 0; i < rst[0]; i++)
					iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
			}

			break;
		}
		default:
			printk(KERN_DEBUG "%s:  Invalid media table selection %d.\n",
					   dev->name, mleaf->type);
			new_csr6 = 0x020E0000;
		}
		if (tulip_debug > 1)
			printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
				   dev->name, medianame[dev->if_port],
				   ioread32(ioaddr + CSR12) & 0xff);
	} else if (tp->chip_id == LC82C168) {
		if (startup && ! tp->medialock)
			dev->if_port = tp->mii_cnt ? 11 : 0;
		if (tulip_debug > 1)
			printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
				   dev->name, ioread32(ioaddr + 0xB8), medianame[dev->if_port]);
		if (tp->mii_cnt) {
			new_csr6 = 0x810C0000;
			iowrite32(0x0001, ioaddr + CSR15);
			iowrite32(0x0201B07A, ioaddr + 0xB8);
		} else if (startup) {
			/* Start with 10mbps to do autonegotiation. */
			iowrite32(0x32, ioaddr + CSR12);
			new_csr6 = 0x00420000;
			iowrite32(0x0001B078, ioaddr + 0xB8);
			iowrite32(0x0201B078, ioaddr + 0xB8);
		} else if (dev->if_port == 3  ||  dev->if_port == 5) {
			iowrite32(0x33, ioaddr + CSR12);
			new_csr6 = 0x01860000;
			/* Trigger autonegotiation. */
			iowrite32(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
		} else {
			iowrite32(0x32, ioaddr + CSR12);
			new_csr6 = 0x00420000;
			iowrite32(0x1F078, ioaddr + 0xB8);
		}
	} else {					/* Unknown chip type with no media table. */
		if (tp->default_port == 0)
			dev->if_port = tp->mii_cnt ? 11 : 3;
		if (tulip_media_cap[dev->if_port] & MediaIsMII) {
			new_csr6 = 0x020E0000;
		} else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
			new_csr6 = 0x02860000;
		} else
			new_csr6 = 0x03860000;
		if (tulip_debug > 1)
			printk(KERN_DEBUG "%s: No media description table, assuming "
				   "%s transceiver, CSR12 %2.2x.\n",
				   dev->name, medianame[dev->if_port],
				   ioread32(ioaddr + CSR12));
	}

	tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);

	mdelay(1);

	return;
}

/*
  Check the MII negotiated duplex and change the CSR6 setting if
  required.
  Return 0 if everything is OK.
  Return < 0 if the transceiver is missing or has no link beat.
  */
int tulip_check_duplex(struct net_device *dev)
{
	struct tulip_private *tp = netdev_priv(dev);
	unsigned int bmsr, lpa, negotiated, new_csr6;

	bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
	lpa = tulip_mdio_read(dev, tp->phys[0], MII_LPA);
	if (tulip_debug > 1)
		printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
			   "%4.4x.\n", dev->name, bmsr, lpa);
	if (bmsr == 0xffff)
		return -2;
	if ((bmsr & BMSR_LSTATUS) == 0) {
		int new_bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
		if ((new_bmsr & BMSR_LSTATUS) == 0) {
			if (tulip_debug  > 1)
				printk(KERN_INFO "%s: No link beat on the MII interface,"
					   " status %4.4x.\n", dev->name, new_bmsr);
			return -1;
		}
	}
	negotiated = lpa & tp->advertising[0];
	tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated);

	new_csr6 = tp->csr6;

	if (negotiated & LPA_100) new_csr6 &= ~TxThreshold;
	else			  new_csr6 |= TxThreshold;
	if (tp->full_duplex) new_csr6 |= FullDuplex;
	else		     new_csr6 &= ~FullDuplex;

	if (new_csr6 != tp->csr6) {
		tp->csr6 = new_csr6;
		tulip_restart_rxtx(tp);

		if (tulip_debug > 0)
			printk(KERN_INFO "%s: Setting %s-duplex based on MII"
				   "#%d link partner capability of %4.4x.\n",
				   dev->name, tp->full_duplex ? "full" : "half",
				   tp->phys[0], lpa);
		return 1;
	}

	return 0;
}

void __devinit tulip_find_mii (struct net_device *dev, int board_idx)
{
	struct tulip_private *tp = netdev_priv(dev);
	int phyn, phy_idx = 0;
	int mii_reg0;
	int mii_advert;
	unsigned int to_advert, new_bmcr, ane_switch;

	/* Find the connected MII xcvrs.
	   Doing this in open() would allow detecting external xcvrs later,
	   but takes much time. */
	for (phyn = 1; phyn <= 32 && phy_idx < sizeof (tp->phys); phyn++) {
		int phy = phyn & 0x1f;
		int mii_status = tulip_mdio_read (dev, phy, MII_BMSR);
		if ((mii_status & 0x8301) == 0x8001 ||
		    ((mii_status & BMSR_100BASE4) == 0
		     && (mii_status & 0x7800) != 0)) {
			/* preserve Becker logic, gain indentation level */
		} else {
			continue;
		}

		mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR);
		mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE);
		ane_switch = 0;

		/* if not advertising at all, gen an
		 * advertising value from the capability
		 * bits in BMSR
		 */
		if ((mii_advert & ADVERTISE_ALL) == 0) {
			unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR);
			mii_advert = ((tmpadv >> 6) & 0x3e0) | 1;
		}

		if (tp->mii_advertise) {
			tp->advertising[phy_idx] =
			to_advert = tp->mii_advertise;
		} else if (tp->advertising[phy_idx]) {
			to_advert = tp->advertising[phy_idx];
		} else {
			tp->advertising[phy_idx] =
			tp->mii_advertise =
			to_advert = mii_advert;
		}

		tp->phys[phy_idx++] = phy;

		printk (KERN_INFO "tulip%d:  MII transceiver #%d "
			"config %4.4x status %4.4x advertising %4.4x.\n",
			board_idx, phy, mii_reg0, mii_status, mii_advert);

		/* Fixup for DLink with miswired PHY. */
		if (mii_advert != to_advert) {
			printk (KERN_DEBUG "tulip%d:  Advertising %4.4x on PHY %d,"
				" previously advertising %4.4x.\n",
				board_idx, to_advert, phy, mii_advert);
			tulip_mdio_write (dev, phy, 4, to_advert);
		}

		/* Enable autonegotiation: some boards default to off. */
		if (tp->default_port == 0) {
			new_bmcr = mii_reg0 | BMCR_ANENABLE;
			if (new_bmcr != mii_reg0) {
				new_bmcr |= BMCR_ANRESTART;
				ane_switch = 1;
			}
		}
		/* ...or disable nway, if forcing media */
		else {
			new_bmcr = mii_reg0 & ~BMCR_ANENABLE;
			if (new_bmcr != mii_reg0)
				ane_switch = 1;
		}

		/* clear out bits we never want at this point */
		new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE |
			      BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK |
			      BMCR_RESET);

		if (tp->full_duplex)
			new_bmcr |= BMCR_FULLDPLX;
		if (tulip_media_cap[tp->default_port] & MediaIs100)
			new_bmcr |= BMCR_SPEED100;

		if (new_bmcr != mii_reg0) {
			/* some phys need the ANE switch to
			 * happen before forced media settings
			 * will "take."  However, we write the
			 * same value twice in order not to
			 * confuse the sane phys.
			 */
			if (ane_switch) {
				tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
				udelay (10);
			}
			tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
		}
	}
	tp->mii_cnt = phy_idx;
	if (tp->mtable && tp->mtable->has_mii && phy_idx == 0) {
		printk (KERN_INFO "tulip%d: ***WARNING***: No MII transceiver found!\n",
			board_idx);
		tp->phys[0] = 1;
	}
}