drivers/net/ethernet/dec/tulip/21142.c - third_party/linux - Git at Google

 /*
 	drivers/net/ethernet/dec/tulip/21142.c

 	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.

 	DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
 	Hardware Reference Manual" is currently available at :
 	http://developer.intel.com/design/network/manuals/278074.htm

 	Please submit bugs to http://bugzilla.kernel.org/ .
 */

 #include <linux/delay.h>
 #include "tulip.h"


 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
 u16 t21142_csr14[] =	    { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };


 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
    of available transceivers.  */
 void t21142_media_task(struct work_struct *work)
 {
 	struct tulip_private *tp =
 		container_of(work, struct tulip_private, media_work);
 	struct net_device *dev = tp->dev;
 	void __iomem *ioaddr = tp->base_addr;
 	int csr12 = ioread32(ioaddr + CSR12);
 	int next_tick = 60*HZ;
 	int new_csr6 = 0;
 	int csr14 = ioread32(ioaddr + CSR14);

 	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
 	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
 		csr12 |= 6;
 	if (tulip_debug > 2)
 		dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
 			 csr12, medianame[dev->if_port]);
 	if (tulip_media_cap[dev->if_port] & MediaIsMII) {
 		if (tulip_check_duplex(dev) < 0) {
 			netif_carrier_off(dev);
 			next_tick = 3*HZ;
 		} else {
 			netif_carrier_on(dev);
 			next_tick = 60*HZ;
 		}
 	} else if (tp->nwayset) {
 		/* Don't screw up a negotiated session! */
 		if (tulip_debug > 1)
 			dev_info(&dev->dev,
 				 "Using NWay-set %s media, csr12 %08x\n",
 				 medianame[dev->if_port], csr12);
 	} else if (tp->medialock) {
 			;
 	} else if (dev->if_port == 3) {
 		if (csr12 & 2) {	/* No 100mbps link beat, revert to 10mbps. */
 			if (tulip_debug > 1)
 				dev_info(&dev->dev,
 					 "No 21143 100baseTx link beat, %08x, trying NWay\n",
 					 csr12);
 			t21142_start_nway(dev);
 			next_tick = 3*HZ;
 		}
 	} else if ((csr12 & 0x7000) != 0x5000) {
 		/* Negotiation failed.  Search media types. */
 		if (tulip_debug > 1)
 			dev_info(&dev->dev,
 				 "21143 negotiation failed, status %08x\n",
 				 csr12);
 		if (!(csr12 & 4)) {		/* 10mbps link beat good. */
 			new_csr6 = 0x82420000;
 			dev->if_port = 0;
 			iowrite32(0, ioaddr + CSR13);
 			iowrite32(0x0003FFFF, ioaddr + CSR14);
 			iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
 			iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
 		} else {
 			/* Select 100mbps port to check for link beat. */
 			new_csr6 = 0x83860000;
 			dev->if_port = 3;
 			iowrite32(0, ioaddr + CSR13);
 			iowrite32(0x0003FFFF, ioaddr + CSR14);
 			iowrite16(8, ioaddr + CSR15);
 			iowrite32(1, ioaddr + CSR13);
 		}
 		if (tulip_debug > 1)
 			dev_info(&dev->dev, "Testing new 21143 media %s\n",
 				 medianame[dev->if_port]);
 		if (new_csr6 != (tp->csr6 & ~0x00D5)) {
 			tp->csr6 &= 0x00D5;
 			tp->csr6 |= new_csr6;
 			iowrite32(0x0301, ioaddr + CSR12);
 			tulip_restart_rxtx(tp);
 		}
 		next_tick = 3*HZ;
 	}

 	/* mod_timer synchronizes us with potential add_timer calls
 	 * from interrupts.
 	 */
 	mod_timer(&tp->timer, RUN_AT(next_tick));
 }


 void t21142_start_nway(struct net_device *dev)
 {
 	struct tulip_private *tp = netdev_priv(dev);
 	void __iomem *ioaddr = tp->base_addr;
 	int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
 		((tp->sym_advertise & 0x0020) << 1) | 0xffbf;

 	dev->if_port = 0;
 	tp->nway = tp->mediasense = 1;
 	tp->nwayset = tp->lpar = 0;
 	if (tulip_debug > 1)
 		netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
 			   csr14);
 	iowrite32(0x0001, ioaddr + CSR13);
 	udelay(100);
 	iowrite32(csr14, ioaddr + CSR14);
 	tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
 	iowrite32(tp->csr6, ioaddr + CSR6);
 	if (tp->mtable  &&  tp->mtable->csr15dir) {
 		iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
 		iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
 	} else
 		iowrite16(0x0008, ioaddr + CSR15);
 	iowrite32(0x1301, ioaddr + CSR12); 		/* Trigger NWAY. */
 }


 void t21142_lnk_change(struct net_device *dev, int csr5)
 {
 	struct tulip_private *tp = netdev_priv(dev);
 	void __iomem *ioaddr = tp->base_addr;
 	int csr12 = ioread32(ioaddr + CSR12);
 	int csr14 = ioread32(ioaddr + CSR14);

 	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
 	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
 		csr12 |= 6;
 	if (tulip_debug > 1)
 		dev_info(&dev->dev,
 			 "21143 link status interrupt %08x, CSR5 %x, %08x\n",
 			 csr12, csr5, csr14);

 	/* If NWay finished and we have a negotiated partner capability. */
 	if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
 		int setup_done = 0;
 		int negotiated = tp->sym_advertise & (csr12 >> 16);
 		tp->lpar = csr12 >> 16;
 		tp->nwayset = 1;
 		/* If partner cannot negotiate, it is 10Mbps Half Duplex */
 		if (!(csr12 & 0x8000))		dev->if_port = 0;
 		else if (negotiated & 0x0100)	dev->if_port = 5;
 		else if (negotiated & 0x0080)	dev->if_port = 3;
 		else if (negotiated & 0x0040)	dev->if_port = 4;
 		else if (negotiated & 0x0020)	dev->if_port = 0;
 		else {
 			tp->nwayset = 0;
 			if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
 				dev->if_port = 3;
 		}
 		tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;

 		if (tulip_debug > 1) {
 			if (tp->nwayset)
 				dev_info(&dev->dev,
 					 "Switching to %s based on link negotiation %04x & %04x = %04x\n",
 					 medianame[dev->if_port],
 					 tp->sym_advertise, tp->lpar,
 					 negotiated);
 			else
 				dev_info(&dev->dev,
 					 "Autonegotiation failed, using %s, link beat status %04x\n",
 					 medianame[dev->if_port], csr12);
 		}

 		if (tp->mtable) {
 			int i;
 			for (i = 0; i < tp->mtable->leafcount; i++)
 				if (tp->mtable->mleaf[i].media == dev->if_port) {
 					int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
 					tp->cur_index = i;
 					tulip_select_media(dev, startup);
 					setup_done = 1;
 					break;
 				}
 		}
 		if ( ! setup_done) {
 			tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
 			if (tp->full_duplex)
 				tp->csr6 |= 0x0200;
 			iowrite32(1, ioaddr + CSR13);
 		}
 #if 0							/* Restart shouldn't be needed. */
 		iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
 		if (tulip_debug > 2)
 			netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
 				   ioread32(ioaddr + CSR5));
 #endif
 		tulip_start_rxtx(tp);
 		if (tulip_debug > 2)
 			netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
 				   tp->csr6, ioread32(ioaddr + CSR6),
 				   ioread32(ioaddr + CSR12));
 	} else if ((tp->nwayset  &&  (csr5 & 0x08000000) &&
 		    (dev->if_port == 3  ||  dev->if_port == 5) &&
 		    (csr12 & 2) == 2) ||
 		   (tp->nway && (csr5 & (TPLnkFail)))) {
 		/* Link blew? Maybe restart NWay. */
 		del_timer_sync(&tp->timer);
 		t21142_start_nway(dev);
 		tp->timer.expires = RUN_AT(3*HZ);
 		add_timer(&tp->timer);
 	} else if (dev->if_port == 3  ||  dev->if_port == 5) {
 		if (tulip_debug > 1)
 			dev_info(&dev->dev, "21143 %s link beat %s\n",
 				 medianame[dev->if_port],
 				 (csr12 & 2) ? "failed" : "good");
 		if ((csr12 & 2)  &&  ! tp->medialock) {
 			del_timer_sync(&tp->timer);
 			t21142_start_nway(dev);
 			tp->timer.expires = RUN_AT(3*HZ);
 			add_timer(&tp->timer);
 		} else if (dev->if_port == 5)
 			iowrite32(csr14 & ~0x080, ioaddr + CSR14);
 	} else if (dev->if_port == 0  ||  dev->if_port == 4) {
 		if ((csr12 & 4) == 0)
 			dev_info(&dev->dev, "21143 10baseT link beat good\n");
 	} else if (!(csr12 & 4)) {		/* 10mbps link beat good. */
 		if (tulip_debug)
 			dev_info(&dev->dev, "21143 10mbps sensed media\n");
 		dev->if_port = 0;
 	} else if (tp->nwayset) {
 		if (tulip_debug)
 			dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
 				 medianame[dev->if_port], tp->csr6);
 	} else {		/* 100mbps link beat good. */
 		if (tulip_debug)
 			dev_info(&dev->dev, "21143 100baseTx sensed media\n");
 		dev->if_port = 3;
 		tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
 		iowrite32(0x0003FF7F, ioaddr + CSR14);
 		iowrite32(0x0301, ioaddr + CSR12);
 		tulip_restart_rxtx(tp);
 	}
 }
	/*
	drivers/net/ethernet/dec/tulip/21142.c

	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.

	DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
	Hardware Reference Manual" is currently available at :
	http://developer.intel.com/design/network/manuals/278074.htm

	Please submit bugs to http://bugzilla.kernel.org/ .
	*/

	#include <linux/delay.h>
	#include "tulip.h"


	static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
	u16 t21142_csr14[] = { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
	static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };


	/* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
	of available transceivers. */
	void t21142_media_task(struct work_struct *work)
	{
	struct tulip_private *tp =
	container_of(work, struct tulip_private, media_work);
	struct net_device *dev = tp->dev;
	void __iomem *ioaddr = tp->base_addr;
	int csr12 = ioread32(ioaddr + CSR12);
	int next_tick = 60*HZ;
	int new_csr6 = 0;
	int csr14 = ioread32(ioaddr + CSR14);

	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
	csr12 \|= 6;
	if (tulip_debug > 2)
	dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
	csr12, medianame[dev->if_port]);
	if (tulip_media_cap[dev->if_port] & MediaIsMII) {
	if (tulip_check_duplex(dev) < 0) {
	netif_carrier_off(dev);
	next_tick = 3*HZ;
	} else {
	netif_carrier_on(dev);
	next_tick = 60*HZ;
	}
	} else if (tp->nwayset) {
	/* Don't screw up a negotiated session! */
	if (tulip_debug > 1)
	dev_info(&dev->dev,
	"Using NWay-set %s media, csr12 %08x\n",
	medianame[dev->if_port], csr12);
	} else if (tp->medialock) {
	;
	} else if (dev->if_port == 3) {
	if (csr12 & 2) { /* No 100mbps link beat, revert to 10mbps. */
	if (tulip_debug > 1)
	dev_info(&dev->dev,
	"No 21143 100baseTx link beat, %08x, trying NWay\n",
	csr12);
	t21142_start_nway(dev);
	next_tick = 3*HZ;
	}
	} else if ((csr12 & 0x7000) != 0x5000) {
	/* Negotiation failed. Search media types. */
	if (tulip_debug > 1)
	dev_info(&dev->dev,
	"21143 negotiation failed, status %08x\n",
	csr12);
	if (!(csr12 & 4)) { /* 10mbps link beat good. */
	new_csr6 = 0x82420000;
	dev->if_port = 0;
	iowrite32(0, ioaddr + CSR13);
	iowrite32(0x0003FFFF, ioaddr + CSR14);
	iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
	iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
	} else {
	/* Select 100mbps port to check for link beat. */
	new_csr6 = 0x83860000;
	dev->if_port = 3;
	iowrite32(0, ioaddr + CSR13);
	iowrite32(0x0003FFFF, ioaddr + CSR14);
	iowrite16(8, ioaddr + CSR15);
	iowrite32(1, ioaddr + CSR13);
	}
	if (tulip_debug > 1)
	dev_info(&dev->dev, "Testing new 21143 media %s\n",
	medianame[dev->if_port]);
	if (new_csr6 != (tp->csr6 & ~0x00D5)) {
	tp->csr6 &= 0x00D5;
	tp->csr6 \|= new_csr6;
	iowrite32(0x0301, ioaddr + CSR12);
	tulip_restart_rxtx(tp);
	}
	next_tick = 3*HZ;
	}

	/* mod_timer synchronizes us with potential add_timer calls
	* from interrupts.
	*/
	mod_timer(&tp->timer, RUN_AT(next_tick));
	}


	void t21142_start_nway(struct net_device *dev)
	{
	struct tulip_private *tp = netdev_priv(dev);
	void __iomem *ioaddr = tp->base_addr;
	int csr14 = ((tp->sym_advertise & 0x0780) << 9) \|
	((tp->sym_advertise & 0x0020) << 1) \| 0xffbf;

	dev->if_port = 0;
	tp->nway = tp->mediasense = 1;
	tp->nwayset = tp->lpar = 0;
	if (tulip_debug > 1)
	netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
	csr14);
	iowrite32(0x0001, ioaddr + CSR13);
	udelay(100);
	iowrite32(csr14, ioaddr + CSR14);
	tp->csr6 = 0x82420000 \| (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
	iowrite32(tp->csr6, ioaddr + CSR6);
	if (tp->mtable && tp->mtable->csr15dir) {
	iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
	iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
	} else
	iowrite16(0x0008, ioaddr + CSR15);
	iowrite32(0x1301, ioaddr + CSR12); /* Trigger NWAY. */
	}



	void t21142_lnk_change(struct net_device *dev, int csr5)
	{
	struct tulip_private *tp = netdev_priv(dev);
	void __iomem *ioaddr = tp->base_addr;
	int csr12 = ioread32(ioaddr + CSR12);
	int csr14 = ioread32(ioaddr + CSR14);

	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
	csr12 \|= 6;
	if (tulip_debug > 1)
	dev_info(&dev->dev,
	"21143 link status interrupt %08x, CSR5 %x, %08x\n",
	csr12, csr5, csr14);

	/* If NWay finished and we have a negotiated partner capability. */
	if (tp->nway && !tp->nwayset && (csr12 & 0x7000) == 0x5000) {
	int setup_done = 0;
	int negotiated = tp->sym_advertise & (csr12 >> 16);
	tp->lpar = csr12 >> 16;
	tp->nwayset = 1;
	/* If partner cannot negotiate, it is 10Mbps Half Duplex */
	if (!(csr12 & 0x8000)) dev->if_port = 0;
	else if (negotiated & 0x0100) dev->if_port = 5;
	else if (negotiated & 0x0080) dev->if_port = 3;
	else if (negotiated & 0x0040) dev->if_port = 4;
	else if (negotiated & 0x0020) dev->if_port = 0;
	else {
	tp->nwayset = 0;
	if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180))
	dev->if_port = 3;
	}
	tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;

	if (tulip_debug > 1) {
	if (tp->nwayset)
	dev_info(&dev->dev,
	"Switching to %s based on link negotiation %04x & %04x = %04x\n",
	medianame[dev->if_port],
	tp->sym_advertise, tp->lpar,
	negotiated);
	else
	dev_info(&dev->dev,
	"Autonegotiation failed, using %s, link beat status %04x\n",
	medianame[dev->if_port], csr12);
	}

	if (tp->mtable) {
	int i;
	for (i = 0; i < tp->mtable->leafcount; i++)
	if (tp->mtable->mleaf[i].media == dev->if_port) {
	int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 \|\| tp->revision == 65)));
	tp->cur_index = i;
	tulip_select_media(dev, startup);
	setup_done = 1;
	break;
	}
	}
	if ( ! setup_done) {
	tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) \| (tp->csr6 & 0x20ff);
	if (tp->full_duplex)
	tp->csr6 \|= 0x0200;
	iowrite32(1, ioaddr + CSR13);
	}
	#if 0 /* Restart shouldn't be needed. */
	iowrite32(tp->csr6 \| RxOn, ioaddr + CSR6);
	if (tulip_debug > 2)
	netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
	ioread32(ioaddr + CSR5));
	#endif
	tulip_start_rxtx(tp);
	if (tulip_debug > 2)
	netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
	tp->csr6, ioread32(ioaddr + CSR6),
	ioread32(ioaddr + CSR12));
	} else if ((tp->nwayset && (csr5 & 0x08000000) &&
	(dev->if_port == 3 \|\| dev->if_port == 5) &&
	(csr12 & 2) == 2) \|\|
	(tp->nway && (csr5 & (TPLnkFail)))) {
	/* Link blew? Maybe restart NWay. */
	del_timer_sync(&tp->timer);
	t21142_start_nway(dev);
	tp->timer.expires = RUN_AT(3*HZ);
	add_timer(&tp->timer);
	} else if (dev->if_port == 3 \|\| dev->if_port == 5) {
	if (tulip_debug > 1)
	dev_info(&dev->dev, "21143 %s link beat %s\n",
	medianame[dev->if_port],
	(csr12 & 2) ? "failed" : "good");
	if ((csr12 & 2) && ! tp->medialock) {
	del_timer_sync(&tp->timer);
	t21142_start_nway(dev);
	tp->timer.expires = RUN_AT(3*HZ);
	add_timer(&tp->timer);
	} else if (dev->if_port == 5)
	iowrite32(csr14 & ~0x080, ioaddr + CSR14);
	} else if (dev->if_port == 0 \|\| dev->if_port == 4) {
	if ((csr12 & 4) == 0)
	dev_info(&dev->dev, "21143 10baseT link beat good\n");
	} else if (!(csr12 & 4)) { /* 10mbps link beat good. */
	if (tulip_debug)
	dev_info(&dev->dev, "21143 10mbps sensed media\n");
	dev->if_port = 0;
	} else if (tp->nwayset) {
	if (tulip_debug)
	dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
	medianame[dev->if_port], tp->csr6);
	} else { /* 100mbps link beat good. */
	if (tulip_debug)
	dev_info(&dev->dev, "21143 100baseTx sensed media\n");
	dev->if_port = 3;
	tp->csr6 = 0x838E0000 \| (tp->csr6 & 0x20ff);
	iowrite32(0x0003FF7F, ioaddr + CSR14);
	iowrite32(0x0301, ioaddr + CSR12);
	tulip_restart_rxtx(tp);
	}
	}