[linux.git] / drivers / net / smc-ultra32.c

/* 	smc-ultra32.c: An SMC Ultra32 EISA ethernet driver for linux.

Sources:

	This driver is based on (cloned from) the ISA SMC Ultra driver
	written by Donald Becker. Modifications to support the EISA
	version of the card by Paul Gortmaker and Leonard N. Zubkoff.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

Theory of Operation:

	The SMC Ultra32C card uses the SMC 83c790 chip which is also
	found on the ISA SMC Ultra cards. It has a shared memory mode of
	operation that makes it similar to the ISA version of the card.
	The main difference is that the EISA card has 32KB of RAM, but
	only an 8KB window into that memory. The EISA card also can be
	set for a bus-mastering mode of operation via the ECU, but that
	is not (and probably will never be) supported by this driver.
	The ECU should be run to enable shared memory and to disable the
	bus-mastering feature for use with linux.

	By programming the 8390 to use only 8KB RAM, the modifications
	to the ISA driver can be limited to the probe and initialization
	code. This allows easy integration of EISA support into the ISA
	driver. However, the driver development kit from SMC provided the
	register information for sliding the 8KB window, and hence the 8390
	is programmed to use the full 32KB RAM.

	Unfortunately this required code changes outside the probe/init
	routines, and thus we decided to separate the EISA driver from
	the ISA one. In this way, ISA users don't end up with a larger
	driver due to the EISA code, and EISA users don't end up with a
	larger driver due to the ISA EtherEZ PIO code. The driver is
	similar to the 3c503/16 driver, in that the window must be set
	back to the 1st 8KB of space for access to the two 8390 Tx slots.

	In testing, using only 8KB RAM (3 Tx / 5 Rx) didn't appear to
	be a limiting factor, since the EISA bus could get packets off
	the card fast enough, but having the use of lots of RAM as Rx
	space is extra insurance if interrupt latencies become excessive.

*/

static const char *version = "smc-ultra32.c: 06/97 v1.00\n";


#include <linux/module.h>
#include <linux/eisa.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>

#include <asm/io.h>
#include <asm/system.h>

#include "8390.h"

#define DRV_NAME "smc-ultra32"

static int ultra32_probe1(struct net_device *dev, int ioaddr);
static int ultra32_open(struct net_device *dev);
static void ultra32_reset_8390(struct net_device *dev);
static void ultra32_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
				 int ring_page);
static void ultra32_block_input(struct net_device *dev, int count,
				struct sk_buff *skb, int ring_offset);
static void ultra32_block_output(struct net_device *dev, int count,
				 const unsigned char *buf,
				 const int start_page);
static int ultra32_close(struct net_device *dev);

#define ULTRA32_CMDREG	0	/* Offset to ASIC command register. */
#define	 ULTRA32_RESET	0x80	/* Board reset, in ULTRA32_CMDREG. */
#define	 ULTRA32_MEMENB	0x40	/* Enable the shared memory. */
#define ULTRA32_NIC_OFFSET 16	/* NIC register offset from the base_addr. */
#define ULTRA32_IO_EXTENT 32
#define EN0_ERWCNT		0x08	/* Early receive warning count. */

/*
 * Defines that apply only to the Ultra32 EISA card. Note that
 * "smc" = 10011 01101 00011 = 0x4da3, and hence !smc8010.cfg translates
 * into an EISA ID of 0x1080A34D
 */
#define ULTRA32_BASE	0xca0
#define ULTRA32_ID	0x1080a34d
#define ULTRA32_IDPORT	(-0x20)	/* 0xc80 */
/* Config regs 1->7 from the EISA !SMC8010.CFG file. */
#define ULTRA32_CFG1	0x04	/* 0xca4 */
#define ULTRA32_CFG2	0x05	/* 0xca5 */
#define ULTRA32_CFG3	(-0x18)	/* 0xc88 */
#define ULTRA32_CFG4	(-0x17)	/* 0xc89 */
#define ULTRA32_CFG5	(-0x16)	/* 0xc8a */
#define ULTRA32_CFG6	(-0x15)	/* 0xc8b */
#define ULTRA32_CFG7	0x0d	/* 0xcad */

static void cleanup_card(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET;
	/* NB: ultra32_close_card() does free_irq */
	release_region(ioaddr, ULTRA32_IO_EXTENT);
	iounmap(ei_status.mem);
}

/*	Probe for the Ultra32.  This looks like a 8013 with the station
	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
	following.
*/

struct net_device * __init ultra32_probe(int unit)
{
	struct net_device *dev;
	int base;
	int irq;
	int err = -ENODEV;

	if (!EISA_bus)
		return ERR_PTR(-ENODEV);

	dev = alloc_ei_netdev();

	if (!dev)
		return ERR_PTR(-ENOMEM);

	if (unit >= 0) {
		sprintf(dev->name, "eth%d", unit);
		netdev_boot_setup_check(dev);
	}

	irq = dev->irq;

	/* EISA spec allows for up to 16 slots, but 8 is typical. */
	for (base = 0x1000 + ULTRA32_BASE; base < 0x9000; base += 0x1000) {
		if (ultra32_probe1(dev, base) == 0)
			break;
		dev->irq = irq;
	}
	if (base >= 0x9000)
		goto out;
	err = register_netdev(dev);
	if (err)
		goto out1;
	return dev;
out1:
	cleanup_card(dev);
out:
	free_netdev(dev);
	return ERR_PTR(err);
}

static int __init ultra32_probe1(struct net_device *dev, int ioaddr)
{
	int i, edge, media, retval;
	int checksum = 0;
	const char *model_name;
	static unsigned version_printed;
	/* Values from various config regs. */
	unsigned char idreg;
	unsigned char reg4;
	const char *ifmap[] = {"UTP No Link", "", "UTP/AUI", "UTP/BNC"};
	DECLARE_MAC_BUF(mac);

	if (!request_region(ioaddr, ULTRA32_IO_EXTENT, DRV_NAME))
		return -EBUSY;

	if (inb(ioaddr + ULTRA32_IDPORT) == 0xff ||
	    inl(ioaddr + ULTRA32_IDPORT) != ULTRA32_ID) {
		retval = -ENODEV;
		goto out;
	}

	media = inb(ioaddr + ULTRA32_CFG7) & 0x03;
	edge = inb(ioaddr + ULTRA32_CFG5) & 0x08;
	printk("SMC Ultra32 in EISA Slot %d, Media: %s, %s IRQs.\n",
		ioaddr >> 12, ifmap[media],
		(edge ? "Edge Triggered" : "Level Sensitive"));

	idreg = inb(ioaddr + 7);
	reg4 = inb(ioaddr + 4) & 0x7f;

	/* Check the ID nibble. */
	if ((idreg & 0xf0) != 0x20) {			/* SMC Ultra */
		retval = -ENODEV;
		goto out;
	}

	/* 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) {
		retval = -ENODEV;
		goto out;
	}

	if (ei_debug  &&  version_printed++ == 0)
		printk(version);

	model_name = "SMC Ultra32";

	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = inb(ioaddr + 8 + i);

	printk("%s: %s at 0x%X, %s",
	       dev->name, model_name, ioaddr, print_mac(mac, dev->dev_addr));

	/* 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);

	/* Reset RAM addr. */
	outb(0x00, ioaddr + 0x0b);

	/* 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 ((inb(ioaddr + ULTRA32_CFG5) & 0x40) == 0) {
		printk("\nsmc-ultra32: Card RAM is disabled!  "
		       "Run EISA config utility.\n");
		retval = -ENODEV;
		goto out;
	}
	if ((inb(ioaddr + ULTRA32_CFG2) & 0x04) == 0)
		printk("\nsmc-ultra32: Ignoring Bus-Master enable bit.  "
		       "Run EISA config utility.\n");

	if (dev->irq < 2) {
		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
		int irq = irqmap[inb(ioaddr + ULTRA32_CFG5) & 0x07];
		if (irq == 0) {
			printk(", failed to detect IRQ line.\n");
			retval = -EAGAIN;
			goto out;
		}
		dev->irq = irq;
	}

	/* The 8390 isn't at the base address, so fake the offset */
	dev->base_addr = ioaddr + ULTRA32_NIC_OFFSET;

	/* Save RAM address in the unused reg0 to avoid excess inb's. */
	ei_status.reg0 = inb(ioaddr + ULTRA32_CFG3) & 0xfc;

	dev->mem_start =  0xc0000 + ((ei_status.reg0 & 0x7c) << 11);

	ei_status.name = model_name;
	ei_status.word16 = 1;
	ei_status.tx_start_page = 0;
	ei_status.rx_start_page = TX_PAGES;
	/* All Ultra32 cards have 32KB memory with an 8KB window. */
	ei_status.stop_page = 128;

	ei_status.mem = ioremap(dev->mem_start, 0x2000);
	if (!ei_status.mem) {
		printk(", failed to ioremap.\n");
		retval = -ENOMEM;
		goto out;
	}
	dev->mem_end = dev->mem_start + 0x1fff;

	printk(", IRQ %d, 32KB memory, 8KB window at 0x%lx-0x%lx.\n",
	       dev->irq, dev->mem_start, dev->mem_end);
	ei_status.block_input = &ultra32_block_input;
	ei_status.block_output = &ultra32_block_output;
	ei_status.get_8390_hdr = &ultra32_get_8390_hdr;
	ei_status.reset_8390 = &ultra32_reset_8390;
	dev->open = &ultra32_open;
	dev->stop = &ultra32_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = ei_poll;
#endif
	NS8390_init(dev, 0);

	return 0;
out:
	release_region(ioaddr, ULTRA32_IO_EXTENT);
	return retval;
}

static int ultra32_open(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC addr */
	int irq_flags = (inb(ioaddr + ULTRA32_CFG5) & 0x08) ? 0 : IRQF_SHARED;
	int retval;

	retval = request_irq(dev->irq, ei_interrupt, irq_flags, dev->name, dev);
	if (retval)
		return retval;

	outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
	outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
	outb(0x84, ioaddr + 5);	/* Enable MEM16 & Disable Bus Master. */
	outb(0x01, ioaddr + 6);	/* Enable Interrupts. */
	/* 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);
	return 0;
}

static int ultra32_close(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* CMDREG */

	netif_stop_queue(dev);

	if (ei_debug > 1)
		printk("%s: Shutting down ethercard.\n", dev->name);

	outb(0x00, ioaddr + ULTRA32_CFG6); /* Disable Interrupts. */
	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
	free_irq(dev->irq, dev);

	NS8390_init(dev, 0);

	return 0;
}

static void ultra32_reset_8390(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC base addr */

	outb(ULTRA32_RESET, ioaddr);
	if (ei_debug > 1) printk("resetting Ultra32, t=%ld...", jiffies);
	ei_status.txing = 0;

	outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
	outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
	outb(0x84, ioaddr + 5);	/* Enable MEM16 & Disable Bus Master. */
	outb(0x01, ioaddr + 6);	/* Enable Interrupts. */
	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 ultra32_get_8390_hdr(struct net_device *dev,
				 struct e8390_pkt_hdr *hdr,
				 int ring_page)
{
	void __iomem *hdr_start = ei_status.mem + ((ring_page & 0x1f) << 8);
	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;

	/* Select correct 8KB Window. */
	outb(ei_status.reg0 | ((ring_page & 0x60) >> 5), RamReg);

#ifdef __BIG_ENDIAN
	/* Officially this is what we are doing, but the readl() is faster */
	/* unfortunately it isn't endian aware of the struct               */
	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
	hdr->count = le16_to_cpu(hdr->count);
#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, or in this case, when a
   packet spans an 8KB boundary. Note that the current 8KB segment is
   already set by the get_8390_hdr routine. */

static void ultra32_block_input(struct net_device *dev,
				int count,
				struct sk_buff *skb,
				int ring_offset)
{
	void __iomem *xfer_start = ei_status.mem + (ring_offset & 0x1fff);
	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;

	if ((ring_offset & ~0x1fff) != ((ring_offset + count - 1) & ~0x1fff)) {
		int semi_count = 8192 - (ring_offset & 0x1FFF);
		memcpy_fromio(skb->data, xfer_start, semi_count);
		count -= semi_count;
		if (ring_offset < 96*256) {
			/* Select next 8KB Window. */
			ring_offset += semi_count;
			outb(ei_status.reg0 | ((ring_offset & 0x6000) >> 13), RamReg);
			memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
		} else {
			/* Select first 8KB Window. */
			outb(ei_status.reg0, RamReg);
			memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
		}
	} else {
		memcpy_fromio(skb->data, xfer_start, count);
	}
}

static void ultra32_block_output(struct net_device *dev,
				 int count,
				 const unsigned char *buf,
				 int start_page)
{
	void __iomem *xfer_start = ei_status.mem + (start_page<<8);
	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;

	/* Select first 8KB Window. */
	outb(ei_status.reg0, RamReg);

	memcpy_toio(xfer_start, buf, count);
}

#ifdef MODULE
#define MAX_ULTRA32_CARDS   4	/* Max number of Ultra cards per module */
static struct net_device *dev_ultra[MAX_ULTRA32_CARDS];

MODULE_DESCRIPTION("SMC Ultra32 EISA ethernet driver");
MODULE_LICENSE("GPL");

int __init init_module(void)
{
	int this_dev, found = 0;

	for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
		struct net_device *dev = ultra32_probe(-1);
		if (IS_ERR(dev))
			break;
		dev_ultra[found++] = dev;
	}
	if (found)
		return 0;
	printk(KERN_WARNING "smc-ultra32.c: No SMC Ultra32 found.\n");
	return -ENXIO;
}

void __exit cleanup_module(void)
{
	int this_dev;

	for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
		struct net_device *dev = dev_ultra[this_dev];
		if (dev) {
			unregister_netdev(dev);
			cleanup_card(dev);
			free_netdev(dev);
		}
	}
}
#endif /* MODULE */
Commit	Line	Data
1da177e4 LT	1	/* smc-ultra32.c: An SMC Ultra32 EISA ethernet driver for linux.
	2
	3	Sources:
	4
	5	This driver is based on (cloned from) the ISA SMC Ultra driver
	6	written by Donald Becker. Modifications to support the EISA
	7	version of the card by Paul Gortmaker and Leonard N. Zubkoff.
	8
	9	This software may be used and distributed according to the terms
	10	of the GNU General Public License, incorporated herein by reference.
	11
	12	Theory of Operation:
	13
	14	The SMC Ultra32C card uses the SMC 83c790 chip which is also
	15	found on the ISA SMC Ultra cards. It has a shared memory mode of
	16	operation that makes it similar to the ISA version of the card.
	17	The main difference is that the EISA card has 32KB of RAM, but
	18	only an 8KB window into that memory. The EISA card also can be
	19	set for a bus-mastering mode of operation via the ECU, but that
	20	is not (and probably will never be) supported by this driver.
	21	The ECU should be run to enable shared memory and to disable the
	22	bus-mastering feature for use with linux.
	23
	24	By programming the 8390 to use only 8KB RAM, the modifications
	25	to the ISA driver can be limited to the probe and initialization
	26	code. This allows easy integration of EISA support into the ISA
	27	driver. However, the driver development kit from SMC provided the
	28	register information for sliding the 8KB window, and hence the 8390
	29	is programmed to use the full 32KB RAM.
	30
	31	Unfortunately this required code changes outside the probe/init
	32	routines, and thus we decided to separate the EISA driver from
	33	the ISA one. In this way, ISA users don't end up with a larger
	34	driver due to the EISA code, and EISA users don't end up with a
	35	larger driver due to the ISA EtherEZ PIO code. The driver is
	36	similar to the 3c503/16 driver, in that the window must be set
	37	back to the 1st 8KB of space for access to the two 8390 Tx slots.
	38
	39	In testing, using only 8KB RAM (3 Tx / 5 Rx) didn't appear to
	40	be a limiting factor, since the EISA bus could get packets off
	41	the card fast enough, but having the use of lots of RAM as Rx
	42	space is extra insurance if interrupt latencies become excessive.
	43
	44	*/
	45
	46	static const char *version = "smc-ultra32.c: 06/97 v1.00\n";
	47
	48
	49	#include <linux/module.h>
	50	#include <linux/eisa.h>
	51	#include <linux/kernel.h>
	52	#include <linux/errno.h>
	53	#include <linux/string.h>
	54	#include <linux/init.h>
	55	#include <linux/interrupt.h>
	56	#include <linux/netdevice.h>
	57	#include <linux/etherdevice.h>
	58
	59	#include <asm/io.h>
	60	#include <asm/system.h>
	61
	62	#include "8390.h"
	63
	64	#define DRV_NAME "smc-ultra32"
65
66	static int ultra32_probe1(struct net_device *dev, int ioaddr);
67	static int ultra32_open(struct net_device *dev);
68	static void ultra32_reset_8390(struct net_device *dev);
69	static void ultra32_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr,
70	int ring_page);
71	static void ultra32_block_input(struct net_device *dev, int count,
72	struct sk_buff *skb, int ring_offset);
73	static void ultra32_block_output(struct net_device *dev, int count,
74	const unsigned char *buf,
75	const int start_page);
76	static int ultra32_close(struct net_device *dev);
6aa20a22	77
1da177e4 LT	78	#define ULTRA32_CMDREG 0 /* Offset to ASIC command register. */
	79	#define ULTRA32_RESET 0x80 /* Board reset, in ULTRA32_CMDREG. */
	80	#define ULTRA32_MEMENB 0x40 /* Enable the shared memory. */
	81	#define ULTRA32_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
	82	#define ULTRA32_IO_EXTENT 32
	83	#define EN0_ERWCNT 0x08 /* Early receive warning count. */
	84
	85	/*
	86	* Defines that apply only to the Ultra32 EISA card. Note that
	87	* "smc" = 10011 01101 00011 = 0x4da3, and hence !smc8010.cfg translates
	88	* into an EISA ID of 0x1080A34D
	89	*/
	90	#define ULTRA32_BASE 0xca0
	91	#define ULTRA32_ID 0x1080a34d
	92	#define ULTRA32_IDPORT (-0x20) /* 0xc80 */
	93	/* Config regs 1->7 from the EISA !SMC8010.CFG file. */
	94	#define ULTRA32_CFG1 0x04 /* 0xca4 */
	95	#define ULTRA32_CFG2 0x05 /* 0xca5 */
	96	#define ULTRA32_CFG3 (-0x18) /* 0xc88 */
	97	#define ULTRA32_CFG4 (-0x17) /* 0xc89 */
	98	#define ULTRA32_CFG5 (-0x16) /* 0xc8a */
	99	#define ULTRA32_CFG6 (-0x15) /* 0xc8b */
	100	#define ULTRA32_CFG7 0x0d /* 0xcad */
	101
	102	static void cleanup_card(struct net_device *dev)
	103	{
	104	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET;
	105	/* NB: ultra32_close_card() does free_irq */
	106	release_region(ioaddr, ULTRA32_IO_EXTENT);
	107	iounmap(ei_status.mem);
	108	}
	109
	110	/* Probe for the Ultra32. This looks like a 8013 with the station
	111	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
	112	following.
	113	*/
	114
	115	struct net_device * __init ultra32_probe(int unit)
	116	{
	117	struct net_device *dev;
	118	int base;
	119	int irq;
	120	int err = -ENODEV;
	121
	122	if (!EISA_bus)
	123	return ERR_PTR(-ENODEV);
	124
	125	dev = alloc_ei_netdev();
	126
	127	if (!dev)
	128	return ERR_PTR(-ENOMEM);
	129
	130	if (unit >= 0) {
	131	sprintf(dev->name, "eth%d", unit);
	132	netdev_boot_setup_check(dev);
	133	}
	134
1da177e4 LT	135	irq = dev->irq;
	136
	137	/* EISA spec allows for up to 16 slots, but 8 is typical. */
	138	for (base = 0x1000 + ULTRA32_BASE; base < 0x9000; base += 0x1000) {
	139	if (ultra32_probe1(dev, base) == 0)
	140	break;
	141	dev->irq = irq;
	142	}
	143	if (base >= 0x9000)
	144	goto out;
	145	err = register_netdev(dev);
	146	if (err)
	147	goto out1;
	148	return dev;
	149	out1:
	150	cleanup_card(dev);
	151	out:
	152	free_netdev(dev);
	153	return ERR_PTR(err);
	154	}
	155
	156	static int __init ultra32_probe1(struct net_device *dev, int ioaddr)
	157	{
	158	int i, edge, media, retval;
	159	int checksum = 0;
	160	const char *model_name;
	161	static unsigned version_printed;
	162	/* Values from various config regs. */
	163	unsigned char idreg;
	164	unsigned char reg4;
	165	const char *ifmap[] = {"UTP No Link", "", "UTP/AUI", "UTP/BNC"};
0795af57	166	DECLARE_MAC_BUF(mac);
1da177e4 LT	167
	168	if (!request_region(ioaddr, ULTRA32_IO_EXTENT, DRV_NAME))
	169	return -EBUSY;
	170
	171	if (inb(ioaddr + ULTRA32_IDPORT) == 0xff \|\|
	172	inl(ioaddr + ULTRA32_IDPORT) != ULTRA32_ID) {
	173	retval = -ENODEV;
	174	goto out;
	175	}
	176
	177	media = inb(ioaddr + ULTRA32_CFG7) & 0x03;
	178	edge = inb(ioaddr + ULTRA32_CFG5) & 0x08;
	179	printk("SMC Ultra32 in EISA Slot %d, Media: %s, %s IRQs.\n",
	180	ioaddr >> 12, ifmap[media],
	181	(edge ? "Edge Triggered" : "Level Sensitive"));
	182
	183	idreg = inb(ioaddr + 7);
	184	reg4 = inb(ioaddr + 4) & 0x7f;
	185
	186	/* Check the ID nibble. */
	187	if ((idreg & 0xf0) != 0x20) { /* SMC Ultra */
	188	retval = -ENODEV;
	189	goto out;
	190	}
	191
	192	/* Select the station address register set. */
	193	outb(reg4, ioaddr + 4);
	194
	195	for (i = 0; i < 8; i++)
	196	checksum += inb(ioaddr + 8 + i);
	197	if ((checksum & 0xff) != 0xff) {
	198	retval = -ENODEV;
	199	goto out;
	200	}
	201
	202	if (ei_debug && version_printed++ == 0)
	203	printk(version);
	204
	205	model_name = "SMC Ultra32";
	206
1da177e4	207	for (i = 0; i < 6; i++)
0795af57 JP	208	dev->dev_addr[i] = inb(ioaddr + 8 + i);
	209
	210	printk("%s: %s at 0x%X, %s",
	211	dev->name, model_name, ioaddr, print_mac(mac, dev->dev_addr));
1da177e4 LT	212
	213	/* Switch from the station address to the alternate register set and
	214	read the useful registers there. */
	215	outb(0x80 \| reg4, ioaddr + 4);
	216
	217	/* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
	218	outb(0x80 \| inb(ioaddr + 0x0c), ioaddr + 0x0c);
	219
	220	/* Reset RAM addr. */
	221	outb(0x00, ioaddr + 0x0b);
	222
	223	/* Switch back to the station address register set so that the
	224	MS-DOS driver can find the card after a warm boot. */
	225	outb(reg4, ioaddr + 4);
	226
	227	if ((inb(ioaddr + ULTRA32_CFG5) & 0x40) == 0) {
	228	printk("\nsmc-ultra32: Card RAM is disabled! "
	229	"Run EISA config utility.\n");
	230	retval = -ENODEV;
	231	goto out;
	232	}
	233	if ((inb(ioaddr + ULTRA32_CFG2) & 0x04) == 0)
	234	printk("\nsmc-ultra32: Ignoring Bus-Master enable bit. "
	235	"Run EISA config utility.\n");
	236
	237	if (dev->irq < 2) {
	238	unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
	239	int irq = irqmap[inb(ioaddr + ULTRA32_CFG5) & 0x07];
	240	if (irq == 0) {
	241	printk(", failed to detect IRQ line.\n");
	242	retval = -EAGAIN;
	243	goto out;
	244	}
	245	dev->irq = irq;
	246	}
	247
	248	/* The 8390 isn't at the base address, so fake the offset */
	249	dev->base_addr = ioaddr + ULTRA32_NIC_OFFSET;
	250
	251	/* Save RAM address in the unused reg0 to avoid excess inb's. */
	252	ei_status.reg0 = inb(ioaddr + ULTRA32_CFG3) & 0xfc;
	253
	254	dev->mem_start = 0xc0000 + ((ei_status.reg0 & 0x7c) << 11);
	255
	256	ei_status.name = model_name;
	257	ei_status.word16 = 1;
	258	ei_status.tx_start_page = 0;
	259	ei_status.rx_start_page = TX_PAGES;
	260	/* All Ultra32 cards have 32KB memory with an 8KB window. */
	261	ei_status.stop_page = 128;
	262
	263	ei_status.mem = ioremap(dev->mem_start, 0x2000);
	264	if (!ei_status.mem) {
	265	printk(", failed to ioremap.\n");
	266	retval = -ENOMEM;
	267	goto out;
	268	}
	269	dev->mem_end = dev->mem_start + 0x1fff;
	270
	271	printk(", IRQ %d, 32KB memory, 8KB window at 0x%lx-0x%lx.\n",
	272	dev->irq, dev->mem_start, dev->mem_end);
	273	ei_status.block_input = &ultra32_block_input;
	274	ei_status.block_output = &ultra32_block_output;
	275	ei_status.get_8390_hdr = &ultra32_get_8390_hdr;
276	ei_status.reset_8390 = &ultra32_reset_8390;
277	dev->open = &ultra32_open;
278	dev->stop = &ultra32_close;
279	#ifdef CONFIG_NET_POLL_CONTROLLER
280	dev->poll_controller = ei_poll;
281	#endif
282	NS8390_init(dev, 0);
283
284	return 0;
285	out:
286	release_region(ioaddr, ULTRA32_IO_EXTENT);
287	return retval;
288	}
289
290	static int ultra32_open(struct net_device *dev)
291	{
292	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC addr */
1fb9df5d	293	int irq_flags = (inb(ioaddr + ULTRA32_CFG5) & 0x08) ? 0 : IRQF_SHARED;
1da177e4 LT	294	int retval;
	295
	296	retval = request_irq(dev->irq, ei_interrupt, irq_flags, dev->name, dev);
	297	if (retval)
	298	return retval;
	299
	300	outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
	301	outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
	302	outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
	303	outb(0x01, ioaddr + 6); /* Enable Interrupts. */
	304	/* Set the early receive warning level in window 0 high enough not
	305	to receive ERW interrupts. */
	306	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
	307	outb(0xff, dev->base_addr + EN0_ERWCNT);
	308	ei_open(dev);
	309	return 0;
	310	}
	311
	312	static int ultra32_close(struct net_device *dev)
	313	{
	314	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* CMDREG */
	315
	316	netif_stop_queue(dev);
6aa20a22	317
1da177e4 LT	318	if (ei_debug > 1)
	319	printk("%s: Shutting down ethercard.\n", dev->name);
	320
	321	outb(0x00, ioaddr + ULTRA32_CFG6); /* Disable Interrupts. */
	322	outb(0x00, ioaddr + 6); /* Disable interrupts. */
	323	free_irq(dev->irq, dev);
	324
	325	NS8390_init(dev, 0);
	326
	327	return 0;
	328	}
	329
	330	static void ultra32_reset_8390(struct net_device *dev)
	331	{
	332	int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC base addr */
	333
	334	outb(ULTRA32_RESET, ioaddr);
	335	if (ei_debug > 1) printk("resetting Ultra32, t=%ld...", jiffies);
	336	ei_status.txing = 0;
	337
	338	outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
	339	outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
	340	outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
	341	outb(0x01, ioaddr + 6); /* Enable Interrupts. */
	342	if (ei_debug > 1) printk("reset done\n");
	343	return;
	344	}
	345
	346	/* Grab the 8390 specific header. Similar to the block_input routine, but
	347	we don't need to be concerned with ring wrap as the header will be at
	348	the start of a page, so we optimize accordingly. */
	349
	350	static void ultra32_get_8390_hdr(struct net_device *dev,
	351	struct e8390_pkt_hdr *hdr,
	352	int ring_page)
	353	{
	354	void __iomem *hdr_start = ei_status.mem + ((ring_page & 0x1f) << 8);
	355	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
	356
	357	/* Select correct 8KB Window. */
	358	outb(ei_status.reg0 \| ((ring_page & 0x60) >> 5), RamReg);
	359
	360	#ifdef __BIG_ENDIAN
	361	/* Officially this is what we are doing, but the readl() is faster */
	362	/* unfortunately it isn't endian aware of the struct */
	363	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
	364	hdr->count = le16_to_cpu(hdr->count);
	365	#else
	366	((unsigned int*)hdr)[0] = readl(hdr_start);
	367	#endif
	368	}
	369
	370	/* Block input and output are easy on shared memory ethercards, the only
	371	complication is when the ring buffer wraps, or in this case, when a
	372	packet spans an 8KB boundary. Note that the current 8KB segment is
	373	already set by the get_8390_hdr routine. */
	374
	375	static void ultra32_block_input(struct net_device *dev,
	376	int count,
	377	struct sk_buff *skb,
	378	int ring_offset)
	379	{
	380	void __iomem *xfer_start = ei_status.mem + (ring_offset & 0x1fff);
	381	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
382
383	if ((ring_offset & ~0x1fff) != ((ring_offset + count - 1) & ~0x1fff)) {
384	int semi_count = 8192 - (ring_offset & 0x1FFF);
385	memcpy_fromio(skb->data, xfer_start, semi_count);
386	count -= semi_count;
387	if (ring_offset < 96*256) {
388	/* Select next 8KB Window. */
389	ring_offset += semi_count;
390	outb(ei_status.reg0 \| ((ring_offset & 0x6000) >> 13), RamReg);
391	memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
392	} else {
393	/* Select first 8KB Window. */
394	outb(ei_status.reg0, RamReg);
395	memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
396	}
397	} else {
4ec03116	398	memcpy_fromio(skb->data, xfer_start, count);
1da177e4 LT	399	}
	400	}
	401
	402	static void ultra32_block_output(struct net_device *dev,
	403	int count,
	404	const unsigned char *buf,
	405	int start_page)
	406	{
	407	void __iomem *xfer_start = ei_status.mem + (start_page<<8);
	408	unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
	409
	410	/* Select first 8KB Window. */
	411	outb(ei_status.reg0, RamReg);
	412
	413	memcpy_toio(xfer_start, buf, count);
	414	}
6aa20a22	415
1da177e4 LT	416	#ifdef MODULE
	417	#define MAX_ULTRA32_CARDS 4 /* Max number of Ultra cards per module */
	418	static struct net_device *dev_ultra[MAX_ULTRA32_CARDS];
	419
	420	MODULE_DESCRIPTION("SMC Ultra32 EISA ethernet driver");
	421	MODULE_LICENSE("GPL");
	422
a2bd2ec8	423	int __init init_module(void)
1da177e4 LT	424	{
	425	int this_dev, found = 0;
	426
	427	for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
	428	struct net_device *dev = ultra32_probe(-1);
	429	if (IS_ERR(dev))
	430	break;
	431	dev_ultra[found++] = dev;
	432	}
	433	if (found)
	434	return 0;
	435	printk(KERN_WARNING "smc-ultra32.c: No SMC Ultra32 found.\n");
	436	return -ENXIO;
	437	}
	438
afc8eb46	439	void __exit cleanup_module(void)
1da177e4 LT	440	{
	441	int this_dev;
	442
	443	for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
	444	struct net_device *dev = dev_ultra[this_dev];
	445	if (dev) {
	446	unregister_netdev(dev);
	447	cleanup_card(dev);
	448	free_netdev(dev);
	449	}
	450	}
	451	}
	452	#endif /* MODULE */
	453