patch-2.3.48 linux/drivers/net/tulip/media.c

• Lines: 404
• Date: Fri Feb 25 15:16:37 2000
• Orig file: v2.3.47/linux/drivers/net/tulip/media.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/drivers/net/tulip/media.c linux/drivers/net/tulip/media.c
@@ -0,0 +1,403 @@
+/*
+	drivers/net/tulip/media.c
+
+	Maintained by Jeff Garzik <jgarzik@mandrakesoft.com>
+	Copyright 2000  The Linux Kernel Team
+	Written/copyright 1994-1999 by Donald Becker.
+
+	This software may be used and distributed according to the terms
+	of the GNU Public License, incorporated herein by reference.
+
+	Please refer to Documentation/networking/tulip.txt for more
+	information on this driver.
+
+*/
+
+#include "tulip.h"
+#include <asm/io.h>
+
+
+/* This is a mysterious value that can be written to CSR11 in the 21040 (only)
+   to support a pre-NWay full-duplex signaling mechanism using short frames.
+   No one knows what it should be, but if left at its default value some
+   10base2(!) packets trigger a full-duplex-request interrupt. */
+#define FULL_DUPLEX_MAGIC	0x6969
+
+
+/* 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 = (struct tulip_private *)dev->priv;
+	int i;
+	int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
+	int retval = 0;
+	long ioaddr = dev->base_addr;
+	long mdio_addr = ioaddr + CSR9;
+
+	if (tp->chip_id == LC82C168) {
+		int i = 1000;
+		outl(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
+		inl(ioaddr + 0xA0);
+		inl(ioaddr + 0xA0);
+		while (--i > 0)
+			if ( ! ((retval = inl(ioaddr + 0xA0)) & 0x80000000))
+				return retval & 0xffff;
+		return 0xffff;
+	}
+
+	if (tp->chip_id == COMET) {
+		if (phy_id == 1) {
+			if (location < 7)
+				return inl(ioaddr + 0xB4 + (location<<2));
+			else if (location == 17)
+				return inl(ioaddr + 0xD0);
+			else if (location >= 29 && location <= 31)
+				return inl(ioaddr + 0xD4 + ((location-29)<<2));
+		}
+		return 0xffff;
+	}
+
+	/* Establish sync by sending at least 32 logic ones. */
+	for (i = 32; i >= 0; i--) {
+		outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+		mdio_delay();
+		outl(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;
+
+		outl(MDIO_ENB | dataval, mdio_addr);
+		mdio_delay();
+		outl(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--) {
+		outl(MDIO_ENB_IN, mdio_addr);
+		mdio_delay();
+		retval = (retval << 1) | ((inl(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
+		outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	return (retval>>1) & 0xffff;
+}
+
+void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+	struct tulip_private *tp = (struct tulip_private *)dev->priv;
+	int i;
+	int cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
+	long ioaddr = dev->base_addr;
+	long mdio_addr = ioaddr + CSR9;
+
+	if (tp->chip_id == LC82C168) {
+		int i = 1000;
+		outl(cmd, ioaddr + 0xA0);
+		do
+			if ( ! (inl(ioaddr + 0xA0) & 0x80000000))
+				break;
+		while (--i > 0);
+		return;
+	}
+
+	if (tp->chip_id == COMET) {
+		if (phy_id != 1)
+			return;
+		if (location < 7)
+			outl(value, ioaddr + 0xB4 + (location<<2));
+		else if (location == 17)
+			outl(value, ioaddr + 0xD0);
+		else if (location >= 29 && location <= 31)
+			outl(value, ioaddr + 0xD4 + ((location-29)<<2));
+		return;
+	}
+
+	/* Establish sync by sending 32 logic ones. */
+	for (i = 32; i >= 0; i--) {
+		outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+		mdio_delay();
+		outl(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;
+		outl(MDIO_ENB | dataval, mdio_addr);
+		mdio_delay();
+		outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+	/* Clear out extra bits. */
+	for (i = 2; i > 0; i--) {
+		outl(MDIO_ENB_IN, mdio_addr);
+		mdio_delay();
+		outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+		mdio_delay();
+	}
+}
+
+
+/* Set up the transceiver control registers for the selected media type. */
+void tulip_select_media(struct net_device *dev, int startup)
+{
+	long ioaddr = dev->base_addr;
+	struct tulip_private *tp = (struct tulip_private *)dev->priv;
+	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)
+				outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
+			outl(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] & 15;
+			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++)
+					outl(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];
+				outl(0, ioaddr + CSR13);
+				outl(csr14val, ioaddr + CSR14);
+				outl(csr15dir, ioaddr + CSR15);	/* Direction */
+				outl(csr15val, ioaddr + CSR15);	/* Data */
+				outl(csr13val, ioaddr + CSR13);
+			} else {
+				csr13val = 1;
+				csr14val = 0x0003FF7F;
+				csr15dir = (setup[0]<<16) | 0x0008;
+				csr15val = (setup[1]<<16) | 0x0008;
+				if (dev->if_port <= 4)
+					csr14val = t21142_csr14[dev->if_port];
+				if (startup) {
+					outl(0, ioaddr + CSR13);
+					outl(csr14val, ioaddr + CSR14);
+				}
+				outl(csr15dir, ioaddr + CSR15);	/* Direction */
+				outl(csr15val, ioaddr + CSR15);	/* Data */
+				if (startup) outl(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;
+			u16 to_advertise;
+
+			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++)
+						outl(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
+				for (i = 0; i < init_length; i++)
+					outl(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) {
+					outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
+					for (i = 0; i < reset_length; i++)
+						outl(reset_sequence[i], ioaddr + CSR12);
+				}
+				for (i = 0; i < init_length; i++)
+					outl(init_sequence[i], ioaddr + CSR12);
+			}
+			to_advertise = (get_u16(&misc_info[1]) & tp->to_advertise) | 1;
+			tp->advertising[phy_num] = to_advertise;
+			if (tulip_debug > 1)
+				printk(KERN_DEBUG "%s:  Advertising %4.4x on PHY %d (%d).\n",
+					   dev->name, to_advertise, phy_num, tp->phys[phy_num]);
+			/* Bogus: put in by a committee?  */
+			tulip_mdio_write(dev, tp->phys[phy_num], 4, to_advertise);
+			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],
+				   inl(ioaddr + CSR12) & 0xff);
+	} else if (tp->chip_id == DC21041) {
+		int port = dev->if_port <= 4 ? dev->if_port : 0;
+		if (tulip_debug > 1)
+			printk(KERN_DEBUG "%s: 21041 using media %s, CSR12 is %4.4x.\n",
+				   dev->name, medianame[port == 3 ? 12: port],
+				   inl(ioaddr + CSR12));
+		outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
+		outl(t21041_csr14[port], ioaddr + CSR14);
+		outl(t21041_csr15[port], ioaddr + CSR15);
+		outl(t21041_csr13[port], ioaddr + CSR13);
+		new_csr6 = 0x80020000;
+	} 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, inl(ioaddr + 0xB8), medianame[dev->if_port]);
+		if (tp->mii_cnt) {
+			new_csr6 = 0x810C0000;
+			outl(0x0001, ioaddr + CSR15);
+			outl(0x0201B07A, ioaddr + 0xB8);
+		} else if (startup) {
+			/* Start with 10mbps to do autonegotiation. */
+			outl(0x32, ioaddr + CSR12);
+			new_csr6 = 0x00420000;
+			outl(0x0001B078, ioaddr + 0xB8);
+			outl(0x0201B078, ioaddr + 0xB8);
+		} else if (dev->if_port == 3  ||  dev->if_port == 5) {
+			outl(0x33, ioaddr + CSR12);
+			new_csr6 = 0x01860000;
+			/* Trigger autonegotiation. */
+			outl(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
+		} else {
+			outl(0x32, ioaddr + CSR12);
+			new_csr6 = 0x00420000;
+			outl(0x1F078, ioaddr + 0xB8);
+		}
+	} else if (tp->chip_id == DC21040) {					/* 21040 */
+		/* Turn on the xcvr interface. */
+		int csr12 = inl(ioaddr + CSR12);
+		if (tulip_debug > 1)
+			printk(KERN_DEBUG "%s: 21040 media type is %s, CSR12 is %2.2x.\n",
+				   dev->name, medianame[dev->if_port], csr12);
+		if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
+			tp->full_duplex = 1;
+		new_csr6 = 0x20000;
+		/* Set the full duplux match frame. */
+		outl(FULL_DUPLEX_MAGIC, ioaddr + CSR11);
+		outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
+		if (t21040_csr13[dev->if_port] & 8) {
+			outl(0x0705, ioaddr + CSR14);
+			outl(0x0006, ioaddr + CSR15);
+		} else {
+			outl(0xffff, ioaddr + CSR14);
+			outl(0x0000, ioaddr + CSR15);
+		}
+		outl(0x8f01 | t21040_csr13[dev->if_port], ioaddr + CSR13);
+	} 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 = 0x028600000;
+		} else
+			new_csr6 = 0x038600000;
+		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],
+				   inl(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 = (struct tulip_private *)dev->priv;
+	int mii_reg1, mii_reg5, negotiated, duplex;
+
+	if (tp->full_duplex_lock)
+		return 0;
+	mii_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
+	mii_reg5 = tulip_mdio_read(dev, tp->phys[0], 5);
+	if (tulip_debug > 1)
+		printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
+			   "%4.4x.\n", dev->name, mii_reg1, mii_reg5);
+	if (mii_reg1 == 0xffff)
+		return -2;
+	if ((mii_reg1 & 0x0004) == 0) {
+		int new_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
+		if ((new_reg1 & 0x0004) == 0) {
+			if (tulip_debug  > 1)
+				printk(KERN_INFO "%s: No link beat on the MII interface,"
+					   " status %4.4x.\n", dev->name, new_reg1);
+			return -1;
+		}
+	}
+	negotiated = mii_reg5 & tp->advertising[0];
+	duplex = ((negotiated & 0x0300) == 0x0100
+			  || (negotiated & 0x00C0) == 0x0040);
+	/* 100baseTx-FD  or  10T-FD, but not 100-HD */
+	if (tp->full_duplex != duplex) {
+		tp->full_duplex = duplex;
+		if (negotiated & 0x038)	/* 100mbps. */
+			tp->csr6 &= ~0x00400000;
+		if (tp->full_duplex) tp->csr6 |= 0x0200;
+		else				 tp->csr6 &= ~0x0200;
+		tulip_outl_CSR6(tp, tp->csr6 | 0x0002);
+		tulip_outl_CSR6(tp, tp->csr6 | 0x2002);
+		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], mii_reg5);
+		return 1;
+	}
+	return 0;
+}
+