Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 403 insertions, 0 deletions

diff --git a/drivers/net/ethernet/dec/tulip/pnic2.c b/drivers/net/ethernet/dec/tulip/pnic2.c
new file mode 100644
index 000000000..72a09156b
--- /dev/null
+++ b/drivers/net/ethernet/dec/tulip/pnic2.c
@@ -0,0 +1,403 @@
+/*
+	drivers/net/ethernet/dec/tulip/pnic2.c
+
+	Copyright 2000,2001  The Linux Kernel Team
+	Written/copyright 1994-2001 by Donald Becker.
+        Modified to hep support PNIC_II by Kevin B. Hendricks
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+        Please submit bugs to http://bugzilla.kernel.org/ .
+*/
+
+
+/* Understanding the PNIC_II - everything is this file is based
+ * on the PNIC_II_PDF datasheet which is sorely lacking in detail
+ *
+ * As I understand things, here are the registers and bits that
+ * explain the masks and constants used in this file that are
+ * either different from the 21142/3 or important for basic operation.
+ *
+ *
+ * CSR 6  (mask = 0xfe3bd1fd of bits not to change)
+ * -----
+ * Bit 24    - SCR
+ * Bit 23    - PCS
+ * Bit 22    - TTM (Trasmit Threshold Mode)
+ * Bit 18    - Port Select
+ * Bit 13    - Start - 1, Stop - 0 Transmissions
+ * Bit 11:10 - Loop Back Operation Mode
+ * Bit 9     - Full Duplex mode (Advertise 10BaseT-FD is CSR14<7> is set)
+ * Bit 1     - Start - 1, Stop - 0 Receive
+ *
+ *
+ * CSR 14  (mask = 0xfff0ee39 of bits not to change)
+ * ------
+ * Bit 19    - PAUSE-Pause
+ * Bit 18    - Advertise T4
+ * Bit 17    - Advertise 100baseTx-FD
+ * Bit 16    - Advertise 100baseTx-HD
+ * Bit 12    - LTE - Link Test Enable
+ * Bit 7     - ANE - Auto Negotiate Enable
+ * Bit 6     - HDE - Advertise 10baseT-HD
+ * Bit 2     - Reset to Power down - kept as 1 for normal operation
+ * Bit 1     -  Loop Back enable for 10baseT MCC
+ *
+ *
+ * CSR 12
+ * ------
+ * Bit 25    - Partner can do T4
+ * Bit 24    - Partner can do 100baseTx-FD
+ * Bit 23    - Partner can do 100baseTx-HD
+ * Bit 22    - Partner can do 10baseT-FD
+ * Bit 21    - Partner can do 10baseT-HD
+ * Bit 15    - LPN is 1 if all above bits are valid other wise 0
+ * Bit 14:12 - autonegotiation state (write 001 to start autonegotiate)
+ * Bit 3     - Autopolarity state
+ * Bit 2     - LS10B - link state of 10baseT 0 - good, 1 - failed
+ * Bit 1     - LS100B - link state of 100baseT 0 - good, 1 - failed
+ *
+ *
+ * Data Port Selection Info
+ *-------------------------
+ *
+ * CSR14<7>   CSR6<18>    CSR6<22>    CSR6<23>    CSR6<24>   MODE/PORT
+ *   1           0           0 (X)       0 (X)       1        NWAY
+ *   0           0           1           0 (X)       0        10baseT
+ *   0           1           0           1           1 (X)    100baseT
+ *
+ *
+ */
+
+
+
+#include "tulip.h"
+#include <linux/delay.h>
+
+
+void pnic2_timer(struct timer_list *t)
+{
+	struct tulip_private *tp = from_timer(tp, t, timer);
+	struct net_device *dev = tp->dev;
+	void __iomem *ioaddr = tp->base_addr;
+	int next_tick = 60*HZ;
+
+	if (tulip_debug > 3)
+		dev_info(&dev->dev, "PNIC2 negotiation status %08x\n",
+			 ioread32(ioaddr + CSR12));
+
+	if (next_tick) {
+		mod_timer(&tp->timer, RUN_AT(next_tick));
+	}
+}
+
+
+void pnic2_start_nway(struct net_device *dev)
+{
+	struct tulip_private *tp = netdev_priv(dev);
+	void __iomem *ioaddr = tp->base_addr;
+        int csr14;
+        int csr12;
+
+        /* set up what to advertise during the negotiation */
+
+        /* load in csr14  and mask off bits not to touch
+         * comment at top of file explains mask value
+         */
+	csr14 = (ioread32(ioaddr + CSR14) & 0xfff0ee39);
+
+        /* bit 17 - advetise 100baseTx-FD */
+        if (tp->sym_advertise & 0x0100) csr14 |= 0x00020000;
+
+        /* bit 16 - advertise 100baseTx-HD */
+        if (tp->sym_advertise & 0x0080) csr14 |= 0x00010000;
+
+        /* bit 6 - advertise 10baseT-HD */
+        if (tp->sym_advertise & 0x0020) csr14 |= 0x00000040;
+
+        /* Now set bit 12 Link Test Enable, Bit 7 Autonegotiation Enable
+         * and bit 0 Don't PowerDown 10baseT
+         */
+        csr14 |= 0x00001184;
+
+	if (tulip_debug > 1)
+		netdev_dbg(dev, "Restarting PNIC2 autonegotiation, csr14=%08x\n",
+			   csr14);
+
+        /* tell pnic2_lnk_change we are doing an nway negotiation */
+	dev->if_port = 0;
+	tp->nway = tp->mediasense = 1;
+	tp->nwayset = tp->lpar = 0;
+
+        /* now we have to set up csr6 for NWAY state */
+
+	tp->csr6 = ioread32(ioaddr + CSR6);
+	if (tulip_debug > 1)
+		netdev_dbg(dev, "On Entry to Nway, csr6=%08x\n", tp->csr6);
+
+        /* mask off any bits not to touch
+         * comment at top of file explains mask value
+         */
+	tp->csr6 = tp->csr6 & 0xfe3bd1fd;
+
+        /* don't forget that bit 9 is also used for advertising */
+        /* advertise 10baseT-FD for the negotiation (bit 9) */
+        if (tp->sym_advertise & 0x0040) tp->csr6 |= 0x00000200;
+
+        /* set bit 24 for nway negotiation mode ...
+         * see Data Port Selection comment at top of file
+         * and "Stop" - reset both Transmit (bit 13) and Receive (bit 1)
+         */
+        tp->csr6 |= 0x01000000;
+	iowrite32(csr14, ioaddr + CSR14);
+	iowrite32(tp->csr6, ioaddr + CSR6);
+        udelay(100);
+
+        /* all set up so now force the negotiation to begin */
+
+        /* read in current values and mask off all but the
+	 * Autonegotiation bits 14:12.  Writing a 001 to those bits
+         * should start the autonegotiation
+         */
+        csr12 = (ioread32(ioaddr + CSR12) & 0xffff8fff);
+        csr12 |= 0x1000;
+	iowrite32(csr12, ioaddr + CSR12);
+}
+
+
+
+void pnic2_lnk_change(struct net_device *dev, int csr5)
+{
+	struct tulip_private *tp = netdev_priv(dev);
+	void __iomem *ioaddr = tp->base_addr;
+        int csr14;
+
+        /* read the staus register to find out what is up */
+	int csr12 = ioread32(ioaddr + CSR12);
+
+	if (tulip_debug > 1)
+		dev_info(&dev->dev,
+			 "PNIC2 link status interrupt %08x,  CSR5 %x, %08x\n",
+			 csr12, csr5, ioread32(ioaddr + CSR14));
+
+	/* If NWay finished and we have a negotiated partner capability.
+         * check bits 14:12 for bit pattern 101 - all is good
+         */
+	if (tp->nway  &&  !tp->nwayset) {
+
+	        /* we did an auto negotiation */
+
+                if ((csr12 & 0x7000) == 0x5000) {
+
+	               /* negotiation ended successfully */
+
+	               /* get the link partners reply and mask out all but
+                        * bits 24-21 which show the partners capabilities
+                        * and match those to what we advertised
+                        *
+                        * then begin to interpret the results of the negotiation.
+                        * Always go in this order : (we are ignoring T4 for now)
+                        *     100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD
+                        */
+
+		        int negotiated = ((csr12 >> 16) & 0x01E0) & tp->sym_advertise;
+		        tp->lpar = (csr12 >> 16);
+		        tp->nwayset = 1;
+
+                        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 {
+			     if (tulip_debug > 1)
+				     dev_info(&dev->dev,
+					      "funny autonegotiate result csr12 %08x advertising %04x\n",
+					      csr12, tp->sym_advertise);
+			     tp->nwayset = 0;
+			     /* so check  if 100baseTx link state is okay */
+			     if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
+			       dev->if_port = 3;
+			}
+
+			/* now record the duplex that was negotiated */
+			tp->full_duplex = 0;
+			if ((dev->if_port == 4) || (dev->if_port == 5))
+			       tp->full_duplex = 1;
+
+			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);
+			}
+
+                        /* remember to turn off bit 7 - autonegotiate
+                         * enable so we can properly end nway mode and
+                         * set duplex (ie. use csr6<9> again)
+                         */
+	                csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f);
+                        iowrite32(csr14,ioaddr + CSR14);
+
+
+                        /* now set the data port and operating mode
+			 * (see the Data Port Selection comments at
+			 * the top of the file
+			 */
+
+			/* get current csr6 and mask off bits not to touch */
+			/* see comment at top of file */
+
+			tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd);
+
+			/* so if using if_port 3 or 5 then select the 100baseT
+			 * port else select the 10baseT port.
+			 * See the Data Port Selection table at the top
+			 * of the file which was taken from the PNIC_II.PDF
+			 * datasheet
+			 */
+			if (dev->if_port & 1) tp->csr6 |= 0x01840000;
+			else tp->csr6 |= 0x00400000;
+
+			/* now set the full duplex bit appropriately */
+			if (tp->full_duplex) tp->csr6 |= 0x00000200;
+
+			iowrite32(1, ioaddr + CSR13);
+
+			if (tulip_debug > 2)
+				netdev_dbg(dev, "Setting CSR6 %08x/%x CSR12 %08x\n",
+					   tp->csr6,
+					   ioread32(ioaddr + CSR6),
+					   ioread32(ioaddr + CSR12));
+
+			/* now the following actually writes out the
+			 * new csr6 values
+			 */
+			tulip_start_rxtx(tp);
+
+                        return;
+
+	        } else {
+	                dev_info(&dev->dev,
+				 "Autonegotiation failed, using %s, link beat status %04x\n",
+				 medianame[dev->if_port], csr12);
+
+                        /* remember to turn off bit 7 - autonegotiate
+                         * enable so we don't forget
+                         */
+	                csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f);
+                        iowrite32(csr14,ioaddr + CSR14);
+
+                        /* what should we do when autonegotiate fails?
+                         * should we try again or default to baseline
+                         * case.  I just don't know.
+                         *
+                         * for now default to some baseline case
+                         */
+
+	                 dev->if_port = 0;
+                         tp->nway = 0;
+                         tp->nwayset = 1;
+
+                         /* set to 10baseTx-HD - see Data Port Selection
+                          * comment given at the top of the file
+                          */
+	                 tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd);
+                         tp->csr6 |= 0x00400000;
+
+	                 tulip_restart_rxtx(tp);
+
+                         return;
+
+		}
+	}
+
+	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. */
+
+		if (tulip_debug > 2)
+			netdev_dbg(dev, "Ugh! Link blew?\n");
+
+		del_timer_sync(&tp->timer);
+		pnic2_start_nway(dev);
+		tp->timer.expires = RUN_AT(3*HZ);
+		add_timer(&tp->timer);
+
+                return;
+	}
+
+
+        if (dev->if_port == 3  ||  dev->if_port == 5) {
+
+	        /* we are at 100mb and a potential link change occurred */
+
+		if (tulip_debug > 1)
+			dev_info(&dev->dev, "PNIC2 %s link beat %s\n",
+				 medianame[dev->if_port],
+				 (csr12 & 2) ? "failed" : "good");
+
+                /* check 100 link beat */
+
+                tp->nway = 0;
+                tp->nwayset = 1;
+
+                /* if failed then try doing an nway to get in sync */
+		if ((csr12 & 2)  &&  ! tp->medialock) {
+			del_timer_sync(&tp->timer);
+			pnic2_start_nway(dev);
+			tp->timer.expires = RUN_AT(3*HZ);
+			add_timer(&tp->timer);
+                }
+
+                return;
+        }
+
+	if (dev->if_port == 0  ||  dev->if_port == 4) {
+
+	        /* we are at 10mb and a potential link change occurred */
+
+		if (tulip_debug > 1)
+			dev_info(&dev->dev, "PNIC2 %s link beat %s\n",
+				 medianame[dev->if_port],
+				 (csr12 & 4) ? "failed" : "good");
+
+
+                tp->nway = 0;
+                tp->nwayset = 1;
+
+                /* if failed, try doing an nway to get in sync */
+		if ((csr12 & 4)  &&  ! tp->medialock) {
+			del_timer_sync(&tp->timer);
+			pnic2_start_nway(dev);
+			tp->timer.expires = RUN_AT(3*HZ);
+			add_timer(&tp->timer);
+                }
+
+                return;
+        }
+
+
+	if (tulip_debug > 1)
+		dev_info(&dev->dev, "PNIC2 Link Change Default?\n");
+
+        /* if all else fails default to trying 10baseT-HD */
+	dev->if_port = 0;
+
+        /* make sure autonegotiate enable is off */
+	csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f);
+        iowrite32(csr14,ioaddr + CSR14);
+
+        /* set to 10baseTx-HD - see Data Port Selection
+         * comment given at the top of the file
+         */
+	tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd);
+        tp->csr6 |= 0x00400000;
+
+	tulip_restart_rxtx(tp);
+}
+