patch-2.1.15 linux/drivers/net/smc-mca.c

• Lines: 383
• Date: Thu Dec 12 16:51:10 1996
• Orig file: v2.1.14/linux/drivers/net/smc-mca.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.14/linux/drivers/net/smc-mca.c linux/drivers/net/smc-mca.c
@@ -0,0 +1,382 @@
+/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
+/*
+    Most of this driver, except for ultramca_probe is nearly
+    verbatim from smc-ultra.c by Donald Becker. The rest is 
+    written and copyright 1996 by David Weis, weisd3458@uni.edu
+
+    This is a driver for the SMC Ultra and SMC EtherEZ ethercards.
+
+    This driver uses the cards in the 8390-compatible, shared memory mode.
+    Most of the run-time complexity is handled by the generic code in
+    8390.c.  The code in this file is responsible for
+
+    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 does not support the programmed-I/O data transfer mode of
+    the EtherEZ.  That support (if available) is smc-ez.c.  Nor does it
+    use the non-8390-compatible "Altego" mode. (No support currently planned.)
+
+    Changelog:
+
+    Paul Gortmaker  : multiple card support for module users.
+    David Weis      : Micro Channel-ized it.
+
+*/
+
+
+#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"
+#include "smc-mca.h"
+#include <linux/mca.h>
+
+int ultramca_probe(struct device *dev);
+
+static int ultramca_open(struct device *dev);
+static void ultramca_reset_8390(struct device *dev);
+static void ultramca_get_8390_hdr(struct device *dev,
+                                  struct e8390_pkt_hdr *hdr, 
+                                  int ring_page);
+static void ultramca_block_input(struct device *dev, int count,
+                                 struct sk_buff *skb, 
+                                 int ring_offset);
+static void ultramca_block_output(struct device *dev, int count,
+                                  const unsigned char *buf,
+                                  const start_page);
+static int ultramca_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 ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
+#define ULTRA_IO_EXTENT 32
+#define EN0_ERWCNT      0x08  /* Early receive warning count. */
+
+
+int ultramca_probe(struct device *dev)
+{
+	unsigned short ioaddr;
+	unsigned char reg4, num_pages;
+	char slot;
+	unsigned char pos2, pos3, pos4, pos5;
+	int i;
+
+	if( (slot=mca_find_adapter(0x61c8,0)) != MCA_NOTFOUND) 
+	{
+#ifndef MODULE
+		mca_set_adapter_name( slot, "SMC Elite/A (8013EP/A)" );
+#endif
+	} 
+	else if( (slot=mca_find_adapter(0x61c9,0)) != MCA_NOTFOUND) 
+	{
+#ifndef MODULE
+		mca_set_adapter_name( slot, "SMC Elite10T/A (8013WP/A)" );
+#endif
+	} 
+	else
+		return -ENODEV;
+
+	pos2 = mca_read_stored_pos(slot, 2);     /* IO range */
+	pos3 = mca_read_stored_pos(slot, 3);     /* shared mem */
+	pos4 = mca_read_stored_pos(slot, 4);     /* bios base */
+	pos5 = mca_read_stored_pos(slot, 5);     /* irq and media */
+
+	dev->base_addr = ioaddr = addr_table[pos2 >> 4].base_addr;
+	dev->irq = irq_table[(pos5 & ~IRQ_MASK) >> 2].irq;
+
+	dev->mem_start = 0;
+	num_pages = 40;
+	for (i = 0; i < 15; i++) 
+	{
+		if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) 
+		{
+			dev->mem_start = mem_table[i].mem_start;
+			num_pages = mem_table[i].num_pages;
+		}
+	}
+
+	if (dev->mem_start == 0)      /* sanity check, shouldn't happen */
+		return -ENODEV;
+
+	reg4 = inb(ioaddr + 4) & 0x7f;
+	outb(reg4, ioaddr + 4);
+
+	printk("%s: SMC Ultra MCA at %#3x,", dev->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);
+
+	/*
+	 *	Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot. 
+	 */
+
+	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
+  
+	/*
+	 *	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);
+
+	/*
+	 *	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, "smc-mca");
+
+	/*
+	 *	The 8390 isn't at the base address, so fake the offset 
+	 */
+
+	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
+
+	ei_status.name = "SMC Ultra MCA";
+	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;
+
+	printk(", IRQ %d memory %#lx-%#lx.\n", dev->irq, dev->mem_start, dev->mem_end-1);
+
+	ei_status.reset_8390 = &ultramca_reset_8390;
+	ei_status.block_input = &ultramca_block_input;
+	ei_status.block_output = &ultramca_block_output;
+	ei_status.get_8390_hdr = &ultramca_get_8390_hdr;
+	dev->open = &ultramca_open;
+	dev->stop = &ultramca_close_card;
+	NS8390_init(dev, 0);
+
+	return 0;
+}
+
+static int ultramca_open(struct device *dev)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+
+	if (request_irq(dev->irq, ei_interrupt, 0, ei_status.name, NULL))
+	return -EAGAIN;
+
+	outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
+	outb(0x80, ioaddr + 5);     /* ??? */
+	outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
+	outb(0x04, ioaddr + 5);     /* ??? */
+
+	/*
+	 *	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 ultramca_reset_8390(struct device *dev)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+
+	outb(ULTRA_RESET, ioaddr);
+	if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
+	ei_status.txing = 0;
+
+	outb(0x80, ioaddr + 5);     /* ??? */
+	outb(0x01, ioaddr + 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 ultramca_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);
+
+#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
+}
+
+/* Block input and output are easy on shared memory ethercards, the only
+   complication is when the ring buffer wraps. */
+
+static void ultramca_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);
+
+	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);
+	}
+
+}
+
+static void ultramca_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);
+
+	memcpy_toio(shmem, buf, count);
+}
+
+static int ultramca_close_card(struct device *dev)
+{
+	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+
+	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, NULL);
+	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
+#undef MODULE        /* don't want to bother now! */
+
+#define MAX_ULTRAMCA_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-mca.c: Presently autoprobing (not recommended) for a single card.\n");
+		}
+		if (register_netdev(dev) != 0) 
+		{
+			printk(KERN_WARNING "smc-mca.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-mca.c"
+ *  version-control: t
+ *  kept-new-versions: 5
+ *  c-indent-level: 8
+ *  tab-width: 8
+ * End:
+ */