patch-2.1.15 linux/drivers/net/es3210.c

• Lines: 439
• Date: Thu Dec 12 16:51:09 1996
• Orig file: v2.1.14/linux/drivers/net/es3210.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.14/linux/drivers/net/es3210.c linux/drivers/net/es3210.c
@@ -0,0 +1,438 @@
+/*
+	es3210.c
+
+	Linux driver for Racal-Interlan ES3210 EISA Network Adapter
+
+	Copyright (C) 1996, Paul Gortmaker.
+
+	This software may be used and distributed according to the terms
+	of the GNU Public License, incorporated herein by reference.
+
+	Information and Code Sources:
+
+	1) The existing myriad of Linux 8390 drivers written by Donald Becker.
+
+	2) Once again Russ Nelson's asm packet driver provided additional info.
+
+	3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
+	   Too bad it doesn't work -- see below.
+
+	The ES3210 is an EISA shared memory NS8390 implementation. Note 
+	that all memory copies to/from the board must be 32bit transfers. 
+	Which rules out using eth_io_copy_and_sum() in this driver.
+
+	Apparently there are two slightly different revisions of the
+	card, since there are two distinct EISA cfg files (!rii0101.cfg
+	and !rii0102.cfg) One has media select in the cfg file and the
+	other doesn't. Hopefully this will work with either.
+
+	That is about all I can tell you about it, having never actually 
+	even seen one of these cards. :)  Try http://www.interlan.com
+	if you want more info.
+
+	Thanks go to Mark Salazar for testing v0.02 of this driver.
+
+	Bugs, to-fix, etc:
+
+	1) The EISA cfg ports that are *supposed* to have the IRQ and shared
+	   mem values just read 0xff all the time. Hrrmpf. Apparently the
+	   same happens with the packet driver as the code for reading
+	   these registers is disabled there. In the meantime, boot with:
+	   ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and
+	   shared memory detection. (The i/o port detection is okay.)
+
+	2) Module support currently untested. Probably works though.
+
+*/
+
+static const char *version =
+	"es3210.c: Driver revision v0.03, 14/09/96\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"
+
+int es_probe(struct device *dev);
+int es_probe1(struct device *dev, int ioaddr);
+
+static int es_open(struct device *dev);
+static int es_close(struct device *dev);
+
+static void es_reset_8390(struct device *dev);
+
+static void es_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
+static void es_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset);
+static void es_block_output(struct device *dev, int count, const unsigned char *buf, const start_page);
+
+#define ES_START_PG	0x00    /* First page of TX buffer		*/
+#define ES_STOP_PG	0x40    /* Last page +1 of RX ring		*/
+
+#define ES_IO_EXTENT	0x37	/* The cfg file says 0xc90 -> 0xcc7	*/
+#define ES_ID_PORT	0xc80	/* Same for all EISA cards 		*/
+#define ES_SA_PROM	0xc90	/* Start of e'net addr.			*/
+#define ES_RESET_PORT	0xc84	/* From the packet driver source	*/
+#define ES_NIC_OFFSET	0xca0	/* Hello, the 8390 is *here*		*/
+
+#define ES_ADDR0	0x02	/* 3 byte vendor prefix			*/
+#define ES_ADDR1	0x07
+#define ES_ADDR2	0x01
+
+/*
+ * Two card revisions. EISA ID's are always rev. minor, rev. major,, and 
+ * then the three vendor letters stored in 5 bits each, with an "a" = 1.
+ * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
+ * config utility determines automagically what config file(s) to use.
+ */
+#define ES_EISA_ID1	0x01012949	/* !rii0101.cfg 		*/
+#define ES_EISA_ID2	0x02012949	/* !rii0102.cfg 		*/
+
+#define ES_CFG1		0xcc0	/* IOPORT(1) --> IOPORT(6) in cfg file	*/
+#define ES_CFG2		0xcc1
+#define ES_CFG3		0xcc2
+#define ES_CFG4		0xcc3
+#define ES_CFG5		0xcc4
+#define ES_CFG6		0xc84	/* NB: 0xc84 is also "reset" port.	*/
+
+/*
+ *	You can OR any of the following bits together and assign it
+ *	to ES_DEBUG to get verbose driver info during operation.
+ *	Some of these don't do anything yet.
+ */
+
+#define ES_D_PROBE	0x01
+#define ES_D_RX_PKT	0x02
+#define ES_D_TX_PKT	0x04
+#define ED_D_IRQ	0x08
+
+#define ES_DEBUG	0
+
+static unsigned char lo_irq_map[] = {3, 4, 5, 6, 7, 9, 10};
+static unsigned char hi_irq_map[] = {11, 12, 0, 14, 0, 0, 0, 15};
+
+/* 
+ *	Probe for the card. The best way is to read the EISA ID if it
+ *	is known. Then we check the prefix of the station address
+ *	PROM for a match against the Racal-Interlan assigned value.
+ */
+
+int es_probe(struct device *dev)
+{
+	unsigned short ioaddr = dev->base_addr;
+
+	if (ioaddr > 0x1ff)		/* Check a single specified location. */
+		return es_probe1(dev, ioaddr);
+	else if (ioaddr > 0)		/* Don't probe at all. */
+		return ENXIO;
+
+	if (!EISA_bus) {
+#if ES_DEBUG & ES_D_PROBE
+		printk("es3210.c: Not EISA bus. Not probing high ports.\n");
+#endif
+		return ENXIO;
+	}
+
+	/* EISA spec allows for up to 16 slots, but 8 is typical. */
+	for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
+		if (check_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT))
+			continue;
+		if (es_probe1(dev, ioaddr) == 0)
+			return 0;
+	}
+
+	return ENODEV;
+}
+
+int es_probe1(struct device *dev, int ioaddr)
+{
+	int i;
+	unsigned long eisa_id;
+
+#if ES_DEBUG & ES_D_PROBE
+	printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT));
+	printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n",
+		inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
+		inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
+#endif
+
+
+/*	Check the EISA ID of the card. */
+	eisa_id = inl(ioaddr + ES_ID_PORT);
+	if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
+		return ENODEV;
+	}
+	
+/*	Check the Racal vendor ID as well. */
+	if (inb(ioaddr + ES_SA_PROM + 0) != ES_ADDR0
+		|| inb(ioaddr + ES_SA_PROM + 1) != ES_ADDR1
+		|| inb(ioaddr + ES_SA_PROM + 2) != ES_ADDR2 ) {
+		printk("es3210.c: card not found");
+		for(i = 0; i < ETHER_ADDR_LEN; i++)
+			printk(" %02x", inb(ioaddr + ES_SA_PROM + i));
+		printk(" (invalid prefix).\n");
+		return ENODEV;
+	}
+
+	/* We should have a "dev" from Space.c or the static module table. */
+	if (dev == NULL) {
+		printk("es3210.c: Passed a NULL device.\n");
+		dev = init_etherdev(0, 0);
+	}
+
+	printk("es3210.c: ES3210 rev. %ld at %#x, node", eisa_id>>24, ioaddr);
+	for(i = 0; i < ETHER_ADDR_LEN; i++) 
+		printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i)));
+
+	/* Snarf the interrupt now. */
+	if (dev->irq == 0) {
+		unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
+		unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
+
+		if (hi_irq != 0) {
+			dev->irq = hi_irq_map[hi_irq - 1];
+		} else {
+			int i = 0;
+			while (lo_irq > (1<<i)) i++;
+			dev->irq = lo_irq_map[i];
+		}
+		printk(" using IRQ %d", dev->irq);
+#if ES_DEBUG & ES_D_PROBE
+		printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n",
+					hi_irq, lo_irq, dev->irq);
+#endif
+	} else {
+		if (dev->irq == 2)
+			dev->irq = 9;			/* Doh! */
+		printk(" assigning IRQ %d", dev->irq);
+	}
+
+	if (request_irq(dev->irq, ei_interrupt, 0, "es3210", NULL)) {
+		printk (" unable to get IRQ %d.\n", dev->irq);
+		return EAGAIN;
+	}
+
+	if (dev->mem_start == 0) {
+		unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
+		unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
+
+		if (mem_enabled != 0x80) {
+			printk(" shared mem disabled - giving up\n");
+			free_irq(dev->irq, NULL);
+			return -ENXIO;
+		}
+		dev->mem_start = 0xC0000 + mem_bits*0x4000;
+		printk(" using ");
+	} else {
+		printk(" assigning ");
+	}
+
+	dev->mem_end = dev->rmem_end = dev->mem_start
+		+ (ES_STOP_PG - ES_START_PG)*256;
+	dev->rmem_start = dev->mem_start + TX_PAGES*256;
+
+	printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1);
+
+	/* Allocate dev->priv and fill in 8390 specific dev fields. */
+	if (ethdev_init(dev)) {
+		printk (" unable to allocate memory for dev->priv.\n");
+		free_irq(dev->irq, NULL);
+		return -ENOMEM;
+	}
+
+#if ES_DEBUG & ES_D_PROBE
+	if (inb(ioaddr + ES_CFG5))
+		printk("es3210: Warning - DMA channel enabled, but not used here.\n");
+#endif
+	/* Note, point at the 8390, and not the card... */
+	dev->base_addr = ioaddr + ES_NIC_OFFSET;
+	request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210");
+
+
+	ei_status.name = "ES3210";
+	ei_status.tx_start_page = ES_START_PG;
+	ei_status.rx_start_page = ES_START_PG + TX_PAGES;
+	ei_status.stop_page = ES_STOP_PG;
+	ei_status.word16 = 1;
+
+	if (ei_debug > 0)
+		printk(version);
+
+	ei_status.reset_8390 = &es_reset_8390;
+	ei_status.block_input = &es_block_input;
+	ei_status.block_output = &es_block_output;
+	ei_status.get_8390_hdr = &es_get_8390_hdr;
+
+	dev->open = &es_open;
+	dev->stop = &es_close;
+	NS8390_init(dev, 0);
+	return 0;
+}
+
+/*
+ *	Reset as per the packet driver method. Judging by the EISA cfg
+ *	file, this just toggles the "Board Enable" bits (bit 2 and 0).
+ */
+
+static void es_reset_8390(struct device *dev)
+{
+	unsigned short ioaddr = dev->base_addr;
+	unsigned long end;
+
+	outb(0x04, ioaddr + ES_RESET_PORT);
+	if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
+
+	end = jiffies + 2*HZ/100;
+        while ((signed)(end - jiffies) > 0) continue;
+
+	ei_status.txing = 0;
+	outb(0x01, ioaddr + ES_RESET_PORT);
+	if (ei_debug > 1) printk("reset done\n");
+
+	return;
+}
+
+/*
+ *	Note: In the following three functions is the implicit assumption
+ *	that the associated memcpy will only use "rep; movsl" as long as
+ *	we keep the counts as some multiple of doublewords. This is a
+ *	requirement of the hardware, and also prevents us from using
+ *	eth_io_copy_and_sum() since we can't guarantee it will limit 
+ *	itself to doubleword access.
+ */
+
+/*
+ *	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. (A single doubleword.)
+ */
+
+static void
+es_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+	unsigned long hdr_start = dev->mem_start + ((ring_page - ES_START_PG)<<8);
+	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+	hdr->count = (hdr->count + 3) & ~3;     /* Round up allocation. */
+}
+
+/*	
+ *	Block input and output are easy on shared memory ethercards, the only
+ *	complication is when the ring buffer wraps. The count will already
+ *	be rounded up to a doubleword value via es_get_8390_hdr() above.
+ */
+
+static void es_block_input(struct device *dev, int count, struct sk_buff *skb,
+						  int ring_offset)
+{
+	unsigned long xfer_start = dev->mem_start + ring_offset - (ES_START_PG<<8);
+
+	if (xfer_start + count > dev->rmem_end) {
+		/* Packet wraps over end of ring buffer. */
+		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. */
+		memcpy_fromio(skb->data, xfer_start, count);
+	}
+}
+
+static void es_block_output(struct device *dev, int count,
+				const unsigned char *buf, int start_page)
+{
+	unsigned long shmem = dev->mem_start + ((start_page - ES_START_PG)<<8);
+
+	count = (count + 3) & ~3;     /* Round up to doubleword */
+	memcpy_toio(shmem, buf, count);
+}
+
+static int es_open(struct device *dev)
+{
+	ei_open(dev);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;
+}
+
+static int es_close(struct device *dev)
+{
+
+	if (ei_debug > 1)
+		printk("%s: Shutting down ethercard.\n", dev->name);
+
+	ei_close(dev);
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+#ifdef MODULE
+#define MAX_ES_CARDS	4	/* Max number of ES3210 cards per module */
+#define NAMELEN		8	/* # of chars for storing dev->name */
+static char namelist[NAMELEN * MAX_ES_CARDS] = { 0, };
+static struct device dev_es3210[MAX_ES_CARDS] = {
+	{
+		NULL,		/* assign a chunk of namelist[] below */
+		0, 0, 0, 0,
+		0, 0,
+		0, 0, 0, NULL, NULL
+	},
+};
+
+static int io[MAX_ES_CARDS] = { 0, };
+static int irq[MAX_ES_CARDS]  = { 0, };
+static int mem[MAX_ES_CARDS] = { 0, };
+
+int
+init_module(void)
+{
+	int this_dev, found = 0;
+
+	for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
+		struct device *dev = &dev_es3210[this_dev];
+		dev->name = namelist+(NAMELEN*this_dev);
+		dev->irq = irq[this_dev];
+		dev->base_addr = io[this_dev];
+		dev->mem_start = mem[this_dev];		/* Currently ignored by driver */
+		dev->init = es_probe;
+		/* Default is to only install one card. */
+		if (io[this_dev] == 0 && this_dev != 0) break;
+		if (register_netdev(dev) != 0) {
+			printk(KERN_WARNING "es3210.c: No es3210 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_ES_CARDS; this_dev++) {
+		struct device *dev = &dev_es3210[this_dev];
+		if (dev->priv != NULL) {
+			kfree(dev->priv);
+			dev->priv = NULL;
+			free_irq(dev->irq, NULL);
+			irq2dev_map[dev->irq] = NULL;
+			release_region(dev->base_addr, ES_IO_EXTENT);
+			unregister_netdev(dev);
+		}
+	}
+}
+#endif /* MODULE */
+