smc-mca.c

linux 内核源代码

/* smc-mca.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, [e-mail]

    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.

    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.
    Tom Sightler	 : Added support for IBM PS/2 Ethernet Adapter/A
    Christopher Turcksin : Changed MCA-probe so that multiple adapters are
			   found correctly (Jul 16, 1997)
    Chris Beauregard	 : Tried to merge the two changes above (Dec 15, 1997)
    Tom Sightler	 : Fixed minor detection bug caused by above merge
    Tom Sightler	 : Added support for three more Western Digital
			   MCA-adapters
    Tom Sightler	 : Added support for 2.2.x mca_find_unused_adapter
    Hartmut Schmidt	 : - Modified parameter detection to handle each
			     card differently depending on a switch-list
			   - 'card_ver' removed from the adapter list
			   - Some minor bug fixes
*/

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

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

#include "8390.h"

#define DRV_NAME "smc-mca"

static int ultramca_open(struct net_device *dev);
static void ultramca_reset_8390(struct net_device *dev);
static void ultramca_get_8390_hdr(struct net_device *dev,
                                  struct e8390_pkt_hdr *hdr,
                                  int ring_page);
static void ultramca_block_input(struct net_device *dev, int count,
                                 struct sk_buff *skb,
                                 int ring_offset);
static void ultramca_block_output(struct net_device *dev, int count,
                                  const unsigned char *buf,
                                  const int start_page);
static int ultramca_close_card(struct net_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. */

#define _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A            0
#define _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A            1
#define _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A              2
#define _6fc1_WD_Starcard_PLUS_A_WD8003ST_A                            3
#define _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A                        4
#define _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A        5
#define _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A        6
#define _efe5_IBM_PS2_Adapter_A_for_Ethernet                           7

struct smc_mca_adapters_t {
	unsigned int id;
	char *name;
};

#define MAX_ULTRAMCA_CARDS 4	/* Max number of Ultra cards per module */

static int ultra_io[MAX_ULTRAMCA_CARDS];
static int ultra_irq[MAX_ULTRAMCA_CARDS];
MODULE_LICENSE("GPL");

module_param_array(ultra_io, int, NULL, 0);
module_param_array(ultra_irq, int, NULL, 0);
MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");

static const struct {
  unsigned int base_addr;
} addr_table[] = {
    { 0x0800 },
    { 0x1800 },
    { 0x2800 },
    { 0x3800 },
    { 0x4800 },
    { 0x5800 },
    { 0x6800 },
    { 0x7800 },
    { 0x8800 },
    { 0x9800 },
    { 0xa800 },
    { 0xb800 },
    { 0xc800 },
    { 0xd800 },
    { 0xe800 },
    { 0xf800 }
};

#define MEM_MASK 64

static const struct {
  unsigned char mem_index;
  unsigned long mem_start;
  unsigned char num_pages;
} mem_table[] = {
    { 16, 0x0c0000, 40 },
    { 18, 0x0c4000, 40 },
    { 20, 0x0c8000, 40 },
    { 22, 0x0cc000, 40 },
    { 24, 0x0d0000, 40 },
    { 26, 0x0d4000, 40 },
    { 28, 0x0d8000, 40 },
    { 30, 0x0dc000, 40 },
    {144, 0xfc0000, 40 },
    {148, 0xfc8000, 40 },
    {154, 0xfd0000, 40 },
    {156, 0xfd8000, 40 },
    {  0, 0x0c0000, 20 },
    {  1, 0x0c2000, 20 },
    {  2, 0x0c4000, 20 },
    {  3, 0x0c6000, 20 }
};

#define IRQ_MASK 243
static const struct {
   unsigned char new_irq;
   unsigned char old_irq;
} irq_table[] = {
   {  3,  3 },
   {  4,  4 },
   { 10, 10 },
   { 14, 15 }
};

static short smc_mca_adapter_ids[] __initdata = {
	0x61c8,
	0x61c9,
	0x6fc0,
	0x6fc1,
	0x6fc2,
	0xefd4,
	0xefd5,
	0xefe5,
	0x0000
};

static char *smc_mca_adapter_names[] __initdata = {
	"SMC Ethercard PLUS Elite/A BNC/AUI (WD8013EP/A)",
	"SMC Ethercard PLUS Elite/A UTP/AUI (WD8013WP/A)",
	"WD Ethercard PLUS/A (WD8003E/A or WD8003ET/A)",
	"WD Starcard PLUS/A (WD8003ST/A)",
	"WD Ethercard PLUS 10T/A (WD8003W/A)",
	"IBM PS/2 Adapter/A for Ethernet UTP/AUI (WD8013WP/A)",
	"IBM PS/2 Adapter/A for Ethernet BNC/AUI (WD8013EP/A)",
	"IBM PS/2 Adapter/A for Ethernet",
	NULL
};

static int ultra_found = 0;

static int __init ultramca_probe(struct device *gen_dev)
{
	unsigned short ioaddr;
	struct net_device *dev;
	unsigned char reg4, num_pages;
	struct mca_device *mca_dev = to_mca_device(gen_dev);
	char slot = mca_dev->slot;
	unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
	int i, rc;
	int adapter = mca_dev->index;
	int tbase = 0;
	int tirq = 0;
	int base_addr = ultra_io[ultra_found];
	int irq = ultra_irq[ultra_found];
	DECLARE_MAC_BUF(mac);

	if (base_addr || irq) {
		printk(KERN_INFO "Probing for SMC MCA adapter");
		if (base_addr) {
			printk(KERN_INFO " at I/O address 0x%04x%c",
			       base_addr, irq ? ' ' : '\n');
		}
		if (irq) {
			printk(KERN_INFO "using irq %d\n", irq);
		}
	}

	tirq = 0;
	tbase = 0;

	/* If we're trying to match a specificied irq or io address,
	 * we'll reject the adapter found unless it's the one we're
	 * looking for */

	pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
	pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
	pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
	pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */

	/* Test the following conditions:
	 * - If an irq parameter is supplied, compare it
	 *   with the irq of the adapter we found
	 * - If a base_addr paramater is given, compare it
	 *   with the base_addr of the adapter we found
	 * - Check that the irq and the base_addr of the
	 *   adapter we found is not already in use by
	 *   this driver
	 */

	switch (mca_dev->index) {
	case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
	case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
	case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
	case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
		{
			tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
			tirq  = irq_table[(pos5 & 0xc) >> 2].new_irq;
			break;
		}
	case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
	case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
	case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
	case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
		{
			tbase = ((pos2 & 0x0fe) * 0x10);
			tirq  = irq_table[(pos5 & 3)].old_irq;
			break;
		}
	}

	if(!tirq || !tbase
	   || (irq && irq != tirq)
	   || (base_addr && tbase != base_addr))
		/* FIXME: we're trying to force the ordering of the
		 * devices here, there should be a way of getting this
		 * to happen */
		return -ENXIO;

        /* Adapter found. */
	dev  = alloc_ei_netdev();
	if(!dev)
		return -ENODEV;

	SET_NETDEV_DEV(dev, gen_dev);
	mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
	mca_device_set_claim(mca_dev, 1);

	printk(KERN_INFO "smc_mca: %s found in slot %d\n",
		       smc_mca_adapter_names[adapter], slot + 1);

	ultra_found++;

	dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
	dev->irq       = mca_device_transform_irq(mca_dev, tirq);
	dev->mem_start = 0;
	num_pages      = 40;

	switch (adapter) {	/* card-# in const array above [hs] */
		case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A: