1 files changed, 562 insertions, 0 deletions

diff --git a/drivers/net/tulip/media.c b/drivers/net/tulip/media.c
new file mode 100644
index 000000000000..edae09a4b021
--- /dev/null
+++ b/drivers/net/tulip/media.c
@@ -0,0 +1,562 @@
+/*
+	drivers/net/tulip/media.c
+
+	Maintained by Jeff Garzik <jgarzik@pobox.com>
+	Copyright 2000,2001  The Linux Kernel Team
+	Written/copyright 1994-2001 by Donald Becker.
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
+	for more information on this driver, or visit the project
+	Web page at http://sourceforge.net/projects/tulip/
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include "tulip.h"
+
+
+/* The maximum data clock rate is 2.5 Mhz.  The minimum timing is usually
+   met by back-to-back PCI I/O cycles, but we insert a delay to avoid
+   "overclocking" issues or future 66Mhz PCI. */
+#define mdio_delay() ioread32(mdio_addr)
+
+/* Read and write the MII registers using software-generated serial
+   MDIO protocol.  It is just different enough from the EEPROM protocol
+   to not share code.  The maxium data clock rate is 2.5 Mhz. */
+#define MDIO_SHIFT_CLK		0x10000
+#define MDIO_DATA_WRITE0	0x00000
+#define MDIO_DATA_WRITE1	0x20000
+#define MDIO_ENB		0x00000 /* Ignore the 0x02000 databook setting. */
+#define MDIO_ENB_IN		0x40000
+#define MDIO_DATA_READ		0x80000
+
+static const unsigned char comet_miireg2offset[32] = {
+	0xB4, 0xB8, 0xBC, 0xC0,  0xC4, 0xC8, 0xCC, 0,  0,0,0,0,  0,0,0,0,
+	0,0xD0,0,0,  0,0,0,0,  0,0,0,0, 0, 0xD4, 0xD8, 0xDC, };
+
+
+/* MII transceiver control section.
+   Read and write the MII registers using software-generated serial
+   MDIO protocol.  See the MII specifications or DP83840A data sheet
+   for details. */
+
+int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
+{
+	struct tulip_private *tp = netdev_priv(dev);
+	int i;
+	int read_cmd = (0xf6 << 10) | ((phy_id & 0x1f) << 5) | location;
+	int retval = 0;
+	void __iomem *ioaddr = tp->base_addr;
+	void __iomem *mdio_addr = ioaddr + CSR9;
+	unsigned long flags;
+
+	if (location & ~0x1f)
+		return 0xffff;
+
+	if (tp->chip_id == COMET  &&  phy_id == 30) {
+		if (comet_miireg2offset[location])
+			return ioread32(ioaddr + comet_miireg2offset[location]);
+		return 0xffff;
+	}
+
+	spin_lock_irqsave(&tp->mii_lock, flags);
+	if (tp->chip_id == LC82C168) {
+		int i = 1000;
+		iowrite32(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
+		ioread32(ioaddr + 0xA0);
+		ioread32(ioaddr + 0xA0);
+		while (--i > 0) {
+			barrier();
+			if ( ! ((retval = ioread32(ioaddr + 0xA0)) & 0x80000000))
+				break;
+		}
+		spin_unlock_irqrestore(&tp->mii_lock, flags);
+		return retval & 0xffff;
+	}
+
+	if(tp->chip_id == ULI526X && tp->revision >= 0x40) {
+		int value;
+		int i = 1000;
+		
+		value = ioread32(ioaddr + CSR9);
+		iowrite32(value & 0xFFEFFFFF, ioaddr + CSR9);
+		
+		value = (phy_id << 21) | (location << 16) | 0x08000000;
+		iowrite32(value, ioaddr + CSR10);
+		
+		while(--i > 0) {
+			mdio_delay();
+			if(ioread32(ioaddr + CSR10) & 0x10000000)
+				break;
+		}
+		retval = ioread32(ioaddr + CSR10);
+		spin_unlock_irqrestore(&tp->mii_lock, flags);
+		return retval & 0xFFFF;
+	}
+	/* Establish sync by sending at least 32 logic ones. */
+	for (i = 32; i >= 0; i--) {
+		iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+		mdio_delay();
+		iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	/* Shift the read command bits out. */
+	for (i = 15; i >= 0; i--) {
+		int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
+
+		iowrite32(MDIO_ENB | dataval, mdio_addr);
+		mdio_delay();
+		iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	/* Read the two transition, 16 data, and wire-idle bits. */
+	for (i = 19; i > 0; i--) {
+		iowrite32(MDIO_ENB_IN, mdio_addr);
+		mdio_delay();
+		retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
+		iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+
+	spin_unlock_irqrestore(&tp->mii_lock, flags);
+	return (retval>>1) & 0xffff;
+}
+
+void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val)
+{
+	struct tulip_private *tp = netdev_priv(dev);
+	int i;
+	int cmd = (0x5002 << 16) | ((phy_id & 0x1f) << 23) | (location<<18) | (val & 0xffff);
+	void __iomem *ioaddr = tp->base_addr;
+	void __iomem *mdio_addr = ioaddr + CSR9;
+	unsigned long flags;
+
+	if (location & ~0x1f)
+		return;
+
+	if (tp->chip_id == COMET && phy_id == 30) {
+		if (comet_miireg2offset[location])
+			iowrite32(val, ioaddr + comet_miireg2offset[location]);
+		return;
+	}
+
+	spin_lock_irqsave(&tp->mii_lock, flags);
+	if (tp->chip_id == LC82C168) {
+		int i = 1000;
+		iowrite32(cmd, ioaddr + 0xA0);
+		do {
+			barrier();
+			if ( ! (ioread32(ioaddr + 0xA0) & 0x80000000))
+				break;
+		} while (--i > 0);
+		spin_unlock_irqrestore(&tp->mii_lock, flags);
+		return;
+	}
+	if (tp->chip_id == ULI526X && tp->revision >= 0x40) {
+		int value;
+		int i = 1000;
+		
+		value = ioread32(ioaddr + CSR9);
+		iowrite32(value & 0xFFEFFFFF, ioaddr + CSR9);
+		
+		value = (phy_id << 21) | (location << 16) | 0x04000000 | (val & 0xFFFF);
+		iowrite32(value, ioaddr + CSR10);
+		
+		while(--i > 0) {
+			if (ioread32(ioaddr + CSR10) & 0x10000000)
+				break;
+		}
+		spin_unlock_irqrestore(&tp->mii_lock, flags);
+	}
+		
+	/* Establish sync by sending 32 logic ones. */
+	for (i = 32; i >= 0; i--) {
+		iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+		mdio_delay();
+		iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	/* Shift the command bits out. */
+	for (i = 31; i >= 0; i--) {
+		int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
+		iowrite32(MDIO_ENB | dataval, mdio_addr);
+		mdio_delay();
+		iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	/* Clear out extra bits. */
+	for (i = 2; i > 0; i--) {
+		iowrite32(MDIO_ENB_IN, mdio_addr);
+		mdio_delay();
+		iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+
+	spin_unlock_irqrestore(&tp->mii_lock, flags);
+}
+
+
+/* Set up the transceiver control registers for the selected media type. */
+void tulip_select_media(struct net_device *dev, int startup)
+{
+	struct tulip_private *tp = netdev_priv(dev);
+	void __iomem *ioaddr = tp->base_addr;
+	struct mediatable *mtable = tp->mtable;
+	u32 new_csr6;
+	int i;
+
+	if (mtable) {
+		struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
+		unsigned char *p = mleaf->leafdata;
+		switch (mleaf->type) {
+		case 0:					/* 21140 non-MII xcvr. */
+			if (tulip_debug > 1)
+				printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
+					   " with control setting %2.2x.\n",
+					   dev->name, p[1]);
+			dev->if_port = p[0];
+			if (startup)
+				iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
+			iowrite32(p[1], ioaddr + CSR12);
+			new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
+			break;
+		case 2: case 4: {
+			u16 setup[5];
+			u32 csr13val, csr14val, csr15dir, csr15val;
+			for (i = 0; i < 5; i++)
+				setup[i] = get_u16(&p[i*2 + 1]);
+
+			dev->if_port = p[0] & MEDIA_MASK;
+			if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
+				tp->full_duplex = 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);
+			}
+			if (tulip_debug > 1)
+				printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
+					   "%4.4x/%4.4x.\n",
+					   dev->name, medianame[dev->if_port], setup[0], setup[1]);
+			if (p[0] & 0x40) {	/* SIA (CSR13-15) setup values are provided. */
+				csr13val = setup[0];
+				csr14val = setup[1];
+				csr15dir = (setup[3]<<16) | setup[2];
+				csr15val = (setup[4]<<16) | setup[2];
+				iowrite32(0, ioaddr + CSR13);
+				iowrite32(csr14val, ioaddr + CSR14);
+				iowrite32(csr15dir, ioaddr + CSR15);	/* Direction */
+				iowrite32(csr15val, ioaddr + CSR15);	/* Data */
+				iowrite32(csr13val, ioaddr + CSR13);
+			} else {
+				csr13val = 1;
+				csr14val = 0;
+				csr15dir = (setup[0]<<16) | 0x0008;
+				csr15val = (setup[1]<<16) | 0x0008;
+				if (dev->if_port <= 4)
+					csr14val = t21142_csr14[dev->if_port];
+				if (startup) {
+					iowrite32(0, ioaddr + CSR13);
+					iowrite32(csr14val, ioaddr + CSR14);
+				}
+				iowrite32(csr15dir, ioaddr + CSR15);	/* Direction */
+				iowrite32(csr15val, ioaddr + CSR15);	/* Data */
+				if (startup) iowrite32(csr13val, ioaddr + CSR13);
+			}
+			if (tulip_debug > 1)
+				printk(KERN_DEBUG "%s:  Setting CSR15 to %8.8x/%8.8x.\n",
+					   dev->name, csr15dir, csr15val);
+			if (mleaf->type == 4)
+				new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
+			else
+				new_csr6 = 0x82420000;
+			break;
+		}
+		case 1: case 3: {
+			int phy_num = p[0];
+			int init_length = p[1];
+			u16 *misc_info, tmp_info;
+
+			dev->if_port = 11;
+			new_csr6 = 0x020E0000;
+			if (mleaf->type == 3) {	/* 21142 */
+				u16 *init_sequence = (u16*)(p+2);
+				u16 *reset_sequence = &((u16*)(p+3))[init_length];
+				int reset_length = p[2 + init_length*2];
+				misc_info = reset_sequence + reset_length;
+				if (startup)
+					for (i = 0; i < reset_length; i++)
+						iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
+				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);
+	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;
+	}
+}