1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>

	Clean up linux emulation code to make it architecture-independent
	as much as possible.

	* linux: Renamed from linuxdev.
	* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
	(MAKE): New variable. Used for the linux.o target.
	* configure.in: Add AC_CHECK_TOOL(MAKE, make).
	* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
	OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
	* linux/src: Renamed from linux/linux.
	* linux/dev: Renamed from linux/mach.
	* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
	instead of mach/include/linux/autoconf.h.
	* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
	* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
	of <i386/ipl.h>.
	* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
	<i386/ipl.h> and <i386/pic.h>.
	* linux/dev/init/main.c: Many i386-dependent codes moved to ...
	* linux/dev/arch/i386/irq.c: ... here.
	* linux/dev/arch/i386/setup.c: New file.
	* linux/dev/arch/i386/linux_emul.h: Likewise.
	* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
	* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
	of <i386/ipl.h>, and moved to ...
	* linux/dev/kernel/sched.c: ... here.
	* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/blocl.c: ... here.
	* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/net.c: ... here.
	* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
	* linux/dev/glue/misc.c: ... here.
	* linux/dev/arch/i386/glue/kmem.c: Moved to ...
	* linux/dev/glue/kmem.c: ... here.

1 files changed, 496 insertions, 0 deletions

diff --git a/linux/src/drivers/net/smc-ultra.c b/linux/src/drivers/net/smc-ultra.c
new file mode 100644
index 0000000..074a235
--- /dev/null
+++ b/linux/src/drivers/net/smc-ultra.c
@@ -0,0 +1,496 @@
+/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
+/*
+	This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
+
+	Written 1993-1998 by Donald Becker.
+
+	Copyright 1993 United States Government as represented by the
+	Director, National Security Agency.
+
+	This software may be used and distributed according to the terms
+	of the GNU Public License, incorporated herein by reference.
+
+	The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+	Center of Excellence in Space Data and Information Sciences
+		Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+	This driver uses the cards in the 8390-compatible mode.
+	Most of the run-time complexity is handled by the generic code in
+	8390.c.  The code in this file is responsible for
+
+		ultra_probe()	 	Detecting and initializing the card.
+		ultra_probe1()	
+
+		ultra_open()		The card-specific details of starting, stopping
+		ultra_reset_8390()	and resetting the 8390 NIC core.
+		ultra_close()
+
+		ultra_block_input()		Routines for reading and writing blocks of
+		ultra_block_output()	packet buffer memory.
+		ultra_pio_input()
+		ultra_pio_output()
+
+	This driver enables the shared memory only when doing the actual data
+	transfers to avoid a bug in early version of the card that corrupted
+	data transferred by a AHA1542.
+
+	This driver now supports the programmed-I/O (PIO) data transfer mode of
+	the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
+	That support (if available) is in smc-ez.c.
+
+	Changelog:
+
+	Paul Gortmaker	: multiple card support for module users.
+	Donald Becker	: 4/17/96 PIO support, minor potential problems avoided.
+	Donald Becker	: 6/6/96 correctly set auto-wrap bit.
+*/
+
+static const char *version =
+	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include "8390.h"
+
+/* A zero-terminated list of I/O addresses to be probed. */
+static unsigned int ultra_portlist[] =
+{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
+
+int ultra_probe(struct device *dev);
+int ultra_probe1(struct device *dev, int ioaddr);
+
+static int ultra_open(struct device *dev);
+static void ultra_reset_8390(struct device *dev);
+static void ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
+						int ring_page);
+static void ultra_block_input(struct device *dev, int count,
+						  struct sk_buff *skb, int ring_offset);
+static void ultra_block_output(struct device *dev, int count,
+							const unsigned char *buf, const int start_page);
+static void ultra_pio_get_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
+						int ring_page);
+static void ultra_pio_input(struct device *dev, int count,
+						  struct sk_buff *skb, int ring_offset);
+static void ultra_pio_output(struct device *dev, int count,
+							 const unsigned char *buf, const int start_page);
+static int ultra_close_card(struct device *dev);
+
+
+#define START_PG		0x00	/* First page of TX buffer */
+
+#define ULTRA_CMDREG	0		/* Offset to ASIC command register. */
+#define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */
+#define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */
+#define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */
+#define IOPA	0x07			/* I/O Pipe Address for PIO operation. */
+#define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */
+#define ULTRA_IO_EXTENT 32
+#define EN0_ERWCNT		0x08	/* Early receive warning count. */
+
+/*	Probe for the Ultra.  This looks like a 8013 with the station
+	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
+	following.
+*/
+#ifdef HAVE_DEVLIST
+struct netdev_entry ultra_drv =
+{"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};
+#else
+
+int ultra_probe(struct device *dev)
+{
+	int i;
+	int base_addr = dev ? dev->base_addr : 0;
+
+	if (base_addr > 0x1ff)		/* Check a single specified location. */
+		return ultra_probe1(dev, base_addr);
+	else if (base_addr != 0)	/* Don't probe at all. */
+		return ENXIO;
+
+	for (i = 0; ultra_portlist[i]; i++) {
+		int ioaddr = ultra_portlist[i];
+		if (check_region(ioaddr, ULTRA_IO_EXTENT))
+			continue;
+		if (ultra_probe1(dev, ioaddr) == 0)
+			return 0;
+	}
+
+	return ENODEV;
+}
+#endif
+
+int ultra_probe1(struct device *dev, int ioaddr)
+{
+	int i;
+	int checksum = 0;
+	const char *model_name;
+	unsigned char eeprom_irq = 0;
+	static unsigned version_printed = 0;
+	/* Values from various config regs. */
+	unsigned char num_pages, irqreg, addr, piomode;
+	unsigned char idreg = inb(ioaddr + 7);
+	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
+
+	/* Check the ID nibble. */
+	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
+		&& (idreg & 0xF0) != 0x40) 		/* SMC EtherEZ */
+		return ENODEV;
+
+	/* Select the station address register set. */
+	outb(reg4, ioaddr + 4);
+
+	for (i = 0; i < 8; i++)
+		checksum += inb(ioaddr + 8 + i);
+	if ((checksum & 0xff) != 0xFF)
+		return ENODEV;
+
+	if (dev == NULL)
+		dev = init_etherdev(0, 0);
+
+	if (ei_debug  &&  version_printed++ == 0)
+		printk(version);
+
+	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
+
+	printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
+
+	for (i = 0; i < 6; i++)
+		printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
+
+	/* Switch from the station address to the alternate register set and
+	   read the useful registers there. */
+	outb(0x80 | reg4, ioaddr + 4);
+
+	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
+	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
+	piomode = inb(ioaddr + 0x8);
+	addr = inb(ioaddr + 0xb);
+	irqreg = inb(ioaddr + 0xd);
+
+	/* Switch back to the station address register set so that the MS-DOS driver
+	   can find the card after a warm boot. */
+	outb(reg4, ioaddr + 4);
+
+	if (dev->irq < 2) {
+		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
+		int irq;
+
+		/* The IRQ bits are split. */
+		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
+
+		if (irq == 0) {
+			printk(", failed to detect IRQ line.\n");
+			return -EAGAIN;
+		}
+		dev->irq = irq;
+		eeprom_irq = 1;
+	}
+
+	/* Allocate dev->priv and fill in 8390 specific dev fields. */
+	if (ethdev_init(dev)) {
+		printk (", no memory for dev->priv.\n");
+                return -ENOMEM;
+        }
+
+	/* OK, we are certain this is going to work.  Setup the device. */
+	request_region(ioaddr, ULTRA_IO_EXTENT, model_name);
+
+	/* The 8390 isn't at the base address, so fake the offset */
+	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
+
+	{
+		int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
+		short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
+
+		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
+		num_pages = num_pages_tbl[(addr >> 4) & 3];
+	}
+
+	ei_status.name = model_name;
+	ei_status.word16 = 1;
+	ei_status.tx_start_page = START_PG;
+	ei_status.rx_start_page = START_PG + TX_PAGES;
+	ei_status.stop_page = num_pages;
+
+	dev->rmem_start = dev->mem_start + TX_PAGES*256;
+	dev->mem_end = dev->rmem_end
+		= dev->mem_start + (ei_status.stop_page - START_PG)*256;
+
+	if (piomode) {
+		printk(",%s IRQ %d programmed-I/O mode.\n",
+			   eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
+		ei_status.block_input = &ultra_pio_input;
+		ei_status.block_output = &ultra_pio_output;
+		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
+	} else {
+		printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
+			   dev->irq, dev->mem_start, dev->mem_end-1);
+		ei_status.block_input = &ultra_block_input;
+		ei_status.block_output = &ultra_block_output;
+		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
+	}
+	ei_status.reset_8390 = &ultra_reset_8390;
+	dev->open = &ultra_open;
+	dev->stop = &ultra_close_card;
+	NS8390_init(dev, 0);
+
+	return 0;
+}
+
+static int
+ultra_open(struct device *dev)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
+							   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
+
+	if (request_irq(dev->irq, ei_interrupt, 0, ei_status.name, dev))
+		return -EAGAIN;
+
+	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
+	outb(0x80, ioaddr + 5);
+	/* Set the IRQ line. */
+	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
+	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
+	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
+
+	if (ei_status.block_input == &ultra_pio_input) {
+		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
+		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
+	} else
+		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
+	/* Set the early receive warning level in window 0 high enough not
+	   to receive ERW interrupts. */
+	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
+	outb(0xff, dev->base_addr + EN0_ERWCNT);
+	ei_open(dev);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static void
+ultra_reset_8390(struct device *dev)
+{
+	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
+
+	outb(ULTRA_RESET, cmd_port);
+	if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
+	ei_status.txing = 0;
+
+	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
+	outb(0x80, cmd_port + 5);
+	if (ei_status.block_input == &ultra_pio_input)
+		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
+	else
+		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
+
+	if (ei_debug > 1) printk("reset done\n");
+	return;
+}
+
+/* Grab the 8390 specific header. Similar to the block_input routine, but
+   we don't need to be concerned with ring wrap as the header will be at
+   the start of a page, so we optimize accordingly. */
+
+static void
+ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+	unsigned long hdr_start = dev->mem_start + ((ring_page - START_PG)<<8);
+
+	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
+#ifdef notdef
+	/* Officially this is what we are doing, but the readl() is faster */
+	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+#else
+	((unsigned int*)hdr)[0] = readl(hdr_start);
+#endif
+	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
+}
+
+/* Block input and output are easy on shared memory ethercards, the only
+   complication is when the ring buffer wraps. */
+
+static void
+ultra_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
+{
+	unsigned long xfer_start = dev->mem_start + ring_offset - (START_PG<<8);
+
+	/* Enable shared memory. */
+	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
+
+	if (xfer_start + count > dev->rmem_end) {
+		/* We must wrap the input move. */
+		int semi_count = dev->rmem_end - xfer_start;
+		memcpy_fromio(skb->data, xfer_start, semi_count);
+		count -= semi_count;
+		memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
+	} else {
+		/* Packet is in one chunk -- we can copy + cksum. */
+		eth_io_copy_and_sum(skb, xfer_start, count, 0);
+	}
+
+	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
+}
+
+static void
+ultra_block_output(struct device *dev, int count, const unsigned char *buf,
+				int start_page)
+{
+	unsigned long shmem = dev->mem_start + ((start_page - START_PG)<<8);
+
+	/* Enable shared memory. */
+	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
+
+	memcpy_toio(shmem, buf, count);
+
+	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
+}
+
+/* The identical operations for programmed I/O cards.
+   The PIO model is trivial to use: the 16 bit start address is written
+   byte-sequentially to IOPA, with no intervening I/O operations, and the
+   data is read or written to the IOPD data port.
+   The only potential complication is that the address register is shared
+   and must be always be rewritten between each read/write direction change.
+   This is no problem for us, as the 8390 code ensures that we are single
+   threaded. */
+static void ultra_pio_get_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
+						int ring_page)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
+	outb(ring_page, ioaddr + IOPA);
+	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
+}
+
+static void ultra_pio_input(struct device *dev, int count,
+						  struct sk_buff *skb, int ring_offset)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+    char *buf = skb->data;
+
+	/* For now set the address again, although it should already be correct. */
+	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
+	outb(ring_offset >> 8, ioaddr + IOPA);
+	/* We know skbuffs are padded to at least word alignment. */
+	insw(ioaddr + IOPD, buf, (count+1)>>1);
+}
+
+static void ultra_pio_output(struct device *dev, int count,
+							const unsigned char *buf, const int start_page)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
+	outb(start_page, ioaddr + IOPA);
+	/* An extra odd byte is OK here as well. */
+	outsw(ioaddr + IOPD, buf, (count+1)>>1);
+}
+
+static int
+ultra_close_card(struct device *dev)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
+
+	dev->start = 0;
+	dev->tbusy = 1;
+
+	if (ei_debug > 1)
+		printk("%s: Shutting down ethercard.\n", dev->name);
+
+	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
+	free_irq(dev->irq, dev);
+	irq2dev_map[dev->irq] = 0;
+
+	NS8390_init(dev, 0);
+
+	/* We should someday disable shared memory and change to 8-bit mode
+	   "just in case"... */
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+
+#ifdef MODULE
+#define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
+#define NAMELEN		8	/* # of chars for storing dev->name */
+static char namelist[NAMELEN * MAX_ULTRA_CARDS] = { 0, };
+static struct device dev_ultra[MAX_ULTRA_CARDS] = {
+	{
+		NULL,		/* assign a chunk of namelist[] below */
+		0, 0, 0, 0,
+		0, 0,
+		0, 0, 0, NULL, NULL
+	},
+};
+
+static int io[MAX_ULTRA_CARDS] = { 0, };
+static int irq[MAX_ULTRA_CARDS]  = { 0, };
+
+/* This is set up so that only a single autoprobe takes place per call.
+ISA device autoprobes on a running machine are not recommended. */
+int
+init_module(void)
+{
+	int this_dev, found = 0;
+
+	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
+		struct device *dev = &dev_ultra[this_dev];
+		dev->name = namelist+(NAMELEN*this_dev);
+		dev->irq = irq[this_dev];
+		dev->base_addr = io[this_dev];
+		dev->init = ultra_probe;
+		if (io[this_dev] == 0)  {
+			if (this_dev != 0) break; /* only autoprobe 1st one */
+			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
+		}
+		if (register_netdev(dev) != 0) {
+			printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
+			if (found != 0) return 0;	/* Got at least one. */
+			return -ENXIO;
+		}
+		found++;
+	}
+
+	return 0;
+}
+
+void
+cleanup_module(void)
+{
+	int this_dev;
+
+	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
+		struct device *dev = &dev_ultra[this_dev];
+		if (dev->priv != NULL) {
+			/* NB: ultra_close_card() does free_irq + irq2dev */
+			int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
+			kfree(dev->priv);
+			dev->priv = NULL;
+			release_region(ioaddr, ULTRA_IO_EXTENT);
+			unregister_netdev(dev);
+		}
+	}
+}
+#endif /* MODULE */
+
+
+/*
+ * Local variables:
+ *  compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
+ *  version-control: t
+ *  kept-new-versions: 5
+ *  c-indent-level: 4
+ *  c-basic-offset: 4
+ *  tab-width: 4
+ * End:
+ */