Import of Linus's Linux 1.1.68

1 files changed, 275 insertions, 0 deletions

diff --git a/drivers/net/ac3200.c b/drivers/net/ac3200.c
new file mode 100644
index 000000000..27f9a8022
--- /dev/null
+++ b/drivers/net/ac3200.c
@@ -0,0 +1,275 @@
+/* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
+/*
+	Written 1993, 1994 by Donald Becker.
+	Copyright 1993 United States Government as represented by the Director,
+	National Security Agency.  This software may only be used and distributed
+	according to the terms of the GNU Public License as modified by SRC,
+	incorporated herein by reference.
+
+	The author may be reached as becker@cesdis.gsfc.nasa.gov, or
+    C/O Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+	This is driver for the Ansel Communications Model 3200 EISA Ethernet LAN
+	Adapter.  The programming information is from the users manual, as related
+	by glee@ardnassak.math.clemson.edu.
+  */
+
+static char *version =
+	"ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <asm/system.h>
+#include <asm/io.h>
+
+#include <linux/netdevice.h>
+#include "8390.h"
+
+/* Offsets from the base address. */
+#define AC_NIC_BASE		0x00
+#define AC_SA_PROM		0x16			/* The station address PROM. */
+#define  AC_ADDR0		 0x00			/* Prefix station address values. */
+#define  AC_ADDR1		 0x40			/* !!!!These are just guesses!!!! */
+#define  AC_ADDR2		 0x90
+#define AC_ID_PORT		0xC80
+#define AC_EISA_ID		 0x0110d305
+#define AC_RESET_PORT	0xC84
+#define  AC_RESET		 0x00
+#define  AC_ENABLE		 0x01
+#define AC_CONFIG		0xC90	/* The configuration port. */
+
+/* Decoding of the configuration register. */
+static unsigned char config2irqmap[8] = {15, 12, 11, 10, 9, 7, 5, 3};
+static int addrmap[8] =
+{0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000,  0xD0000, 0 };
+static char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
+
+#define config2irq(configval)	config2irqmap[((configval) >> 3) & 7]
+#define config2mem(configval)	addrmap[(configval) & 7]
+#define config2name(configval)	port_name[((configval) >> 6) & 3]
+
+/* First and last 8390 pages. */
+#define AC_START_PG		0x00	/* First page of 8390 TX buffer */
+#define AC_STOP_PG		0x80	/* Last page +1 of the 8390 RX ring */
+
+int ac3200_probe(struct device *dev);
+static int ac_probe1(int ioaddr, struct device *dev);
+
+static int ac_open(struct device *dev);
+static void ac_reset_8390(struct device *dev);
+static int ac_block_input(struct device *dev, int count,
+						  char *buf, int ring_offset);
+static void ac_block_output(struct device *dev, const int count,
+							const unsigned char *buf, const int start_page);
+static int ac_close_card(struct device *dev);
+
+
+/*	Probe for the AC3200.
+
+	The AC3200 can be identified by either the EISA configuration registers,
+	or the unique value in the station address PROM.
+	*/
+
+int ac3200_probe(struct device *dev)
+{
+	unsigned short ioaddr = dev->base_addr;
+
+	if (ioaddr > 0x1ff)		/* Check a single specified location. */
+		return ac_probe1(ioaddr, dev);
+	else if (ioaddr > 0)		/* Don't probe at all. */
+		return ENXIO;
+
+	/* If you have a pre-pl15 machine you should delete this line. */
+	if ( ! EISA_bus)
+		return ENXIO;
+
+	for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000)
+		if (ac_probe1(ioaddr, dev) == 0)
+			return 0;
+
+	return ENODEV;
+}
+
+static int ac_probe1(int ioaddr, struct device *dev)
+{
+	int i;
+
+#ifndef final_version
+	printk("AC3200 ethercard probe at %#3x:", ioaddr);
+
+	for(i = 0; i < 6; i++)
+		printk(" %02x", inb(ioaddr + AC_SA_PROM + i));
+#endif
+
+	/* !!!!The values of AC_ADDRn (see above) should be corrected when we
+	   find out the correct station address prefix!!!! */
+	if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
+		|| inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
+		|| inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
+#ifndef final_version
+		printk(" not found (invalid prefix).\n");
+#endif
+		return ENODEV;
+	}
+
+	/* The correct probe method is to check the EISA ID. */
+	for (i = 0; i < 4; i++)
+		if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
+			printk("EISA ID mismatch, %8x vs %8x.\n",
+				   inl(ioaddr + AC_EISA_ID), AC_EISA_ID); 
+			return ENODEV;
+		}
+
+	for(i = 0; i < ETHER_ADDR_LEN; i++)
+		dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
+
+#ifndef final_version
+	printk("\nAC3200 ethercard configuration register is %#02x,"
+		   " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
+		   inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
+		   inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
+#endif
+
+	/* Assign and snarf the interrupt now. */
+	if (dev->irq == 0)
+		dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
+	else if (dev->irq == 2)
+		dev->irq = 9;
+
+	if (request_irq(dev->irq, ei_interrupt, 0, "ac3200")) {
+		printk (" unable to get IRQ %d.\n", dev->irq);
+		return 0;
+	}
+
+	dev->base_addr = ioaddr;
+
+#ifdef notyet
+	if (dev->mem_start)	{		/* Override the value from the board. */
+		for (i = 0; i < 7; i++)
+			if (addrmap[i] == dev->mem_start)
+				break;
+		if (i >= 7)
+			i = 0;
+		outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
+	}
+#endif
+
+	dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
+	dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
+	dev->rmem_start = dev->mem_start + TX_PAGES*256;
+	dev->mem_end = dev->rmem_end = dev->mem_start
+		+ (AC_STOP_PG - AC_START_PG)*256;
+
+	ethdev_init(dev);
+
+	ei_status.name = "AC3200";
+	ei_status.tx_start_page = AC_START_PG;
+	ei_status.rx_start_page = AC_START_PG + TX_PAGES;
+	ei_status.stop_page = AC_STOP_PG;
+	ei_status.word16 = 1;
+
+	printk("\n%s: AC3200 at %#x, IRQ %d, %s port, shared memory %#lx-%#lx.\n",
+		   dev->name, ioaddr, dev->irq, port_name[dev->if_port],
+		   dev->mem_start, dev->mem_end-1);
+
+	if (ei_debug > 0)
+		printk(version);
+
+	ei_status.reset_8390 = &ac_reset_8390;
+	ei_status.block_input = &ac_block_input;
+	ei_status.block_output = &ac_block_output;
+
+	dev->open = &ac_open;
+	dev->stop = &ac_close_card;
+	NS8390_init(dev, 0);
+	return 0;
+}
+
+static int ac_open(struct device *dev)
+{
+#ifdef notyet
+	/* Someday we may enable the IRQ and shared memory here. */
+	int ioaddr = dev->base_addr;
+
+	if (request_irq(dev->irq, ei_interrupt, 0, "ac3200"))
+		return -EAGAIN;
+#endif
+
+	return ei_open(dev);
+}
+
+static void ac_reset_8390(struct device *dev)
+{
+	ushort ioaddr = dev->base_addr;
+
+	outb(AC_RESET, ioaddr + AC_RESET_PORT);
+	if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
+
+	ei_status.txing = 0;
+	outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
+	if (ei_debug > 1) printk("reset done\n");
+
+	return;
+}
+
+/*  Block input and output are easy on shared memory ethercards, the only
+	complication is when the ring buffer wraps. */
+
+static int ac_block_input(struct device *dev, int count, char *buf,
+						  int ring_offset)
+{
+	long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8);
+
+	if (xfer_start + count > dev->rmem_end) {
+		/* We must wrap the input move. */
+		int semi_count = dev->rmem_end - xfer_start;
+		memcpy(buf, (char*)xfer_start, semi_count);
+		count -= semi_count;
+		memcpy(buf + semi_count, (char *)dev->rmem_start, count);
+		return dev->rmem_start + count;
+	}
+	memcpy(buf, (char*)xfer_start, count);
+
+	return ring_offset + count;
+}
+
+static void ac_block_output(struct device *dev, int count,
+							const unsigned char *buf, int start_page)
+{
+	long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
+
+	memcpy((unsigned char *)shmem, buf, count);
+}
+
+static int ac_close_card(struct device *dev)
+{
+	dev->start = 0;
+	dev->tbusy = 1;
+
+	if (ei_debug > 1)
+		printk("%s: Shutting down ethercard.\n", dev->name);
+
+#ifdef notyet
+	/* We should someday disable shared memory and interrupts. */
+	outb(0x00, ioaddr + 6);	/* Disable interrupts. */
+	free_irq(dev->irq);
+	irq2dev_map[dev->irq] = 0;
+#endif
+
+	NS8390_init(dev, 0);
+
+	return 0;
+}
+
+
+/*
+ * Local variables:
+ * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c ac3200.c"
+ *  version-control: t
+ *  kept-new-versions: 5
+ *  tab-width: 4
+ * End:
+ */