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Subject[PATCH] Arcnet fixes and support for Sohard
Hello,

Here some patches to the Arcnet drivers based upon the 2.4.6. The
modifications run here w/o problems. The first bug fix has to do with the
resource handling, request_region returns NULL on error. The second bug
fix corrects the number of I/O bytes needed for a COM20020 (8 instead of
9), and the last (non bug) fix is to support Sohard's COM20020 boards.


diff -u -r linux-2.4.6/drivers/net/arcnet/com20020-pci.c linux-2.4.6-arcnet-patch/drivers/net/arcnet/com20020-pci.c
--- linux-2.4.6/drivers/net/arcnet/com20020-pci.c Wed Apr 18 23:40:05 2001
+++ linux-2.4.6-arcnet-patch/drivers/net/arcnet/com20020-pci.c Mon Jul 16 09:19:36 2001
@@ -1,5 +1,6 @@
/*
- * Linux ARCnet driver - COM20020 PCI support (Contemporary Controls PCI20)
+ * Linux ARCnet driver - COM20020 PCI support
+ * for Contemporary Controls PCI20 and SOHARD SH-ARC PCI with com20020 chipset
*
* Written 1994-1999 by Avery Pennarun,
* based on an ISA version by David Woodhouse.
@@ -85,7 +86,21 @@
memset(lp, 0, sizeof(struct arcnet_local));
pdev->driver_data = dev;

- ioaddr = pci_resource_start(pdev, 2);
+ // SOHARD needs PCI base addr 4
+ if (pdev->vendor==0x10B5) {
+ BUGMSG(D_NORMAL, "SOHARD\n");
+ ioaddr = pci_resource_start(pdev, 4);
+ }
+ else {
+ BUGMSG(D_NORMAL, "Contemporary Controls\n");
+ ioaddr = pci_resource_start(pdev, 2);
+ }
+
+ // Dummy access after Reset
+ // ARCNET controller needs this access to detect bustype
+ outb(0x00,ioaddr+1);
+ inb(ioaddr+1);
+
dev->base_addr = ioaddr;
dev->irq = pdev->irq;
dev->dev_addr[0] = node;
@@ -151,6 +166,7 @@
{ 0x1571, 0xa204, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ARC_CAN_10MBIT },
{ 0x1571, 0xa205, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ARC_CAN_10MBIT },
{ 0x1571, 0xa206, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ARC_CAN_10MBIT },
+ { 0x10B5, 0x9050, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ARC_CAN_10MBIT },
{0,}
};

diff -u -r linux-2.4.6/drivers/net/arcnet/com20020.c linux-2.4.6-arcnet-patch/drivers/net/arcnet/com20020.c
--- linux-2.4.6/drivers/net/arcnet/com20020.c Tue Feb 13 22:15:05 2001
+++ linux-2.4.6-arcnet-patch/drivers/net/arcnet/com20020.c Mon Jul 16 09:28:59 2001
@@ -1,6 +1,6 @@
/*
* Linux ARCnet driver - COM20020 chipset support
- *
+ *
* Written 1997 by David Woodhouse.
* Written 1994-1999 by Avery Pennarun.
* Written 1999 by Martin Mares <mj@suse.cz>.
@@ -98,6 +98,9 @@
lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
lp->setup2 = (lp->clockm << 4) | 8;

+ /* Enable P1Mode for backplane mode */
+ lp->setup = lp->setup | P1MODE;
+
SET_SUBADR(SUB_SETUP1);
outb(lp->setup, _XREG);

@@ -105,7 +108,7 @@
{
SET_SUBADR(SUB_SETUP2);
outb(lp->setup2, _XREG);
-
+
/* must now write the magic "restart operation" command */
mdelay(1);
outb(0x18, _COMMAND);
@@ -183,7 +186,7 @@
{
SET_SUBADR(SUB_SETUP2);
outb(lp->setup2, _XREG);
-
+
/* must now write the magic "restart operation" command */
mdelay(1);
outb(0x18, _COMMAND);
@@ -202,7 +205,7 @@
return -ENODEV;
}
/* reserve the I/O region */
- if (request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
+ if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
free_irq(dev->irq, dev);
return -EBUSY;
}
@@ -218,7 +221,7 @@
BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout);

BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n",
- lp->setup >> 1,
+ lp->setup >> 1,
clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]);

if (!dev->init && register_netdev(dev)) {
@@ -230,9 +233,9 @@
}


-/*
+/*
* Do a hardware reset on the card, and set up necessary registers.
- *
+ *
* This should be called as little as possible, because it disrupts the
* token on the network (causes a RECON) and requires a significant delay.
*
diff -u -r linux-2.4.6/include/linux/com20020.h linux-2.4.6-arcnet-patch/include/linux/com20020.h
--- linux-2.4.6/include/linux/com20020.h Fri Apr 6 19:51:19 2001
+++ linux-2.4.6-arcnet-patch/include/linux/com20020.h Mon Jul 16 09:57:32 2001
@@ -32,7 +32,7 @@
void com20020_remove(struct net_device *dev);

/* The number of low I/O ports used by the card. */
-#define ARCNET_TOTAL_SIZE 9
+#define ARCNET_TOTAL_SIZE 8

/* various register addresses */
#define _INTMASK (ioaddr+0) /* writable */
@@ -59,6 +59,8 @@

/* in SETUP register */
#define PROMISCset 0x10 /* enable RCV_ALL */
+#define P1MODE 0x80 /* enable P1-MODE for Backplane */
+#define SLOWARB 0x01 /* enable Slow Arbitration for >=5Mbps */

/* COM2002x */
#define SUB_TENTATIVE 0 /* tentative node ID */


Roman

--
Roman Fietze (Mail Code 6) roman.fietze@de.heidelberg.com
Heidelberg Digital Finishing GmbH, Germany DDF-T SWEC ESW


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