/*	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"/* 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;		}		case 5: case 6: {			u16 setup[5];			u32 csr13val, csr14val, csr15dir, csr15val;			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++)					outl(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],				   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_restart_rxtx(tp, tp->csr6);		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;}