424 lines
11 KiB
C
424 lines
11 KiB
C
/* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
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/*
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Written 1993, 1994 by Donald Becker.
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Copyright 1993 United States Government as represented by the Director,
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National Security Agency. This software may only be used and distributed
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according to the terms of the GNU General Public License as modified by SRC,
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incorporated herein by reference.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation
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410 Severn Ave., Suite 210
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Annapolis MD 21403
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This is driver for the Ansel Communications Model 3200 EISA Ethernet LAN
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Adapter. The programming information is from the users manual, as related
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by glee@ardnassak.math.clemson.edu.
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Changelog:
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Paul Gortmaker 05/98 : add support for shared mem above 1MB.
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*/
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static const char version[] =
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"ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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#include <linux/module.h>
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#include <linux/eisa.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/init.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include "8390.h"
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#define DRV_NAME "ac3200"
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/* Offsets from the base address. */
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#define AC_NIC_BASE 0x00
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#define AC_SA_PROM 0x16 /* The station address PROM. */
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#define AC_ADDR0 0x00 /* Prefix station address values. */
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#define AC_ADDR1 0x40
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#define AC_ADDR2 0x90
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#define AC_ID_PORT 0xC80
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#define AC_EISA_ID 0x0110d305
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#define AC_RESET_PORT 0xC84
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#define AC_RESET 0x00
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#define AC_ENABLE 0x01
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#define AC_CONFIG 0xC90 /* The configuration port. */
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#define AC_IO_EXTENT 0x20
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/* Actually accessed is:
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* AC_NIC_BASE (0-15)
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* AC_SA_PROM (0-5)
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* AC_ID_PORT (0-3)
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* AC_RESET_PORT
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* AC_CONFIG
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*/
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/* Decoding of the configuration register. */
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static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
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static int addrmap[8] =
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{0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
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static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
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#define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
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#define config2mem(configval) addrmap[(configval) & 7]
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#define config2name(configval) port_name[((configval) >> 6) & 3]
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/* First and last 8390 pages. */
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#define AC_START_PG 0x00 /* First page of 8390 TX buffer */
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#define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
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static int ac_probe1(int ioaddr, struct net_device *dev);
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static int ac_open(struct net_device *dev);
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static void ac_reset_8390(struct net_device *dev);
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static void ac_block_input(struct net_device *dev, int count,
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struct sk_buff *skb, int ring_offset);
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static void ac_block_output(struct net_device *dev, const int count,
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const unsigned char *buf, const int start_page);
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static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
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int ring_page);
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static int ac_close_card(struct net_device *dev);
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/* Probe for the AC3200.
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The AC3200 can be identified by either the EISA configuration registers,
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or the unique value in the station address PROM.
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*/
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static int __init do_ac3200_probe(struct net_device *dev)
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{
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unsigned short ioaddr = dev->base_addr;
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int irq = dev->irq;
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int mem_start = dev->mem_start;
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SET_MODULE_OWNER(dev);
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if (ioaddr > 0x1ff) /* Check a single specified location. */
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return ac_probe1(ioaddr, dev);
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else if (ioaddr > 0) /* Don't probe at all. */
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return -ENXIO;
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if ( ! EISA_bus)
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return -ENXIO;
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for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
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if (ac_probe1(ioaddr, dev) == 0)
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return 0;
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dev->irq = irq;
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dev->mem_start = mem_start;
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}
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return -ENODEV;
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}
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#ifndef MODULE
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struct net_device * __init ac3200_probe(int unit)
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{
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struct net_device *dev = alloc_ei_netdev();
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int err;
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if (!dev)
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return ERR_PTR(-ENOMEM);
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sprintf(dev->name, "eth%d", unit);
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netdev_boot_setup_check(dev);
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err = do_ac3200_probe(dev);
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if (err)
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goto out;
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return dev;
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out:
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free_netdev(dev);
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return ERR_PTR(err);
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}
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#endif
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static int __init ac_probe1(int ioaddr, struct net_device *dev)
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{
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int i, retval;
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if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
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return -EBUSY;
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if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
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retval = -ENODEV;
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goto out;
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}
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if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
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retval = -ENODEV;
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goto out;
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}
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#ifndef final_version
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printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
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" EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
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inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
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inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
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#endif
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printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
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for(i = 0; i < 6; i++)
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printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
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#if 0
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/* Check the vendor ID/prefix. Redundant after checking the EISA ID */
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if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
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|| inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
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|| inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
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printk(", not found (invalid prefix).\n");
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retval = -ENODEV;
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goto out;
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}
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#endif
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/* Assign and allocate the interrupt now. */
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if (dev->irq == 0) {
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dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
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printk(", using");
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} else {
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dev->irq = irq_canonicalize(dev->irq);
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printk(", assigning");
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}
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retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
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if (retval) {
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printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
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goto out1;
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}
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printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
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dev->base_addr = ioaddr;
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#ifdef notyet
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if (dev->mem_start) { /* Override the value from the board. */
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for (i = 0; i < 7; i++)
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if (addrmap[i] == dev->mem_start)
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break;
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if (i >= 7)
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i = 0;
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outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
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}
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#endif
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dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
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dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
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printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
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dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
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/*
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* BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
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* the card mem within the region covered by `normal' RAM !!!
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*
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* ioremap() will fail in that case.
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*/
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ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
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if (!ei_status.mem) {
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printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
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printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
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printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
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retval = -EINVAL;
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goto out1;
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}
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printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
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AC_STOP_PG/4, ei_status.mem);
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dev->mem_start = (unsigned long)ei_status.mem;
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dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
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ei_status.name = "AC3200";
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ei_status.tx_start_page = AC_START_PG;
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ei_status.rx_start_page = AC_START_PG + TX_PAGES;
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ei_status.stop_page = AC_STOP_PG;
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ei_status.word16 = 1;
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if (ei_debug > 0)
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printk(version);
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ei_status.reset_8390 = &ac_reset_8390;
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ei_status.block_input = &ac_block_input;
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ei_status.block_output = &ac_block_output;
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ei_status.get_8390_hdr = &ac_get_8390_hdr;
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dev->open = &ac_open;
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dev->stop = &ac_close_card;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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dev->poll_controller = ei_poll;
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#endif
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NS8390_init(dev, 0);
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retval = register_netdev(dev);
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if (retval)
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goto out2;
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return 0;
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out2:
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if (ei_status.reg0)
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iounmap(ei_status.mem);
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out1:
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free_irq(dev->irq, dev);
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out:
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release_region(ioaddr, AC_IO_EXTENT);
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return retval;
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}
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static int ac_open(struct net_device *dev)
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{
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#ifdef notyet
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/* Someday we may enable the IRQ and shared memory here. */
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int ioaddr = dev->base_addr;
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#endif
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ei_open(dev);
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return 0;
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}
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static void ac_reset_8390(struct net_device *dev)
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{
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ushort ioaddr = dev->base_addr;
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outb(AC_RESET, ioaddr + AC_RESET_PORT);
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if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
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ei_status.txing = 0;
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outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
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if (ei_debug > 1) printk("reset done\n");
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return;
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}
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/* Grab the 8390 specific header. Similar to the block_input routine, but
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we don't need to be concerned with ring wrap as the header will be at
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the start of a page, so we optimize accordingly. */
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static void
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ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
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{
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void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
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memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
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}
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/* Block input and output are easy on shared memory ethercards, the only
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complication is when the ring buffer wraps. */
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static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
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int ring_offset)
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{
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void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
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if (ring_offset + count > AC_STOP_PG*256) {
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/* We must wrap the input move. */
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int semi_count = AC_STOP_PG*256 - ring_offset;
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memcpy_fromio(skb->data, start, semi_count);
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count -= semi_count;
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memcpy_fromio(skb->data + semi_count,
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ei_status.mem + TX_PAGES*256, count);
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} else {
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/* Packet is in one chunk -- we can copy + cksum. */
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eth_io_copy_and_sum(skb, start, count, 0);
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}
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}
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static void ac_block_output(struct net_device *dev, int count,
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const unsigned char *buf, int start_page)
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{
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void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
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memcpy_toio(shmem, buf, count);
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}
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static int ac_close_card(struct net_device *dev)
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{
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if (ei_debug > 1)
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printk("%s: Shutting down ethercard.\n", dev->name);
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#ifdef notyet
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/* We should someday disable shared memory and interrupts. */
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outb(0x00, ioaddr + 6); /* Disable interrupts. */
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free_irq(dev->irq, dev);
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#endif
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ei_close(dev);
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return 0;
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}
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#ifdef MODULE
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#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
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static struct net_device *dev_ac32[MAX_AC32_CARDS];
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static int io[MAX_AC32_CARDS];
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static int irq[MAX_AC32_CARDS];
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static int mem[MAX_AC32_CARDS];
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module_param_array(io, int, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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module_param_array(mem, int, NULL, 0);
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MODULE_PARM_DESC(io, "I/O base address(es)");
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MODULE_PARM_DESC(irq, "IRQ number(s)");
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MODULE_PARM_DESC(mem, "Memory base address(es)");
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MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
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MODULE_LICENSE("GPL");
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int
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init_module(void)
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{
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struct net_device *dev;
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int this_dev, found = 0;
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for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
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if (io[this_dev] == 0 && this_dev != 0)
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break;
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dev = alloc_ei_netdev();
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if (!dev)
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break;
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dev->irq = irq[this_dev];
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dev->base_addr = io[this_dev];
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dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
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if (do_ac3200_probe(dev) == 0) {
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dev_ac32[found++] = dev;
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continue;
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}
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free_netdev(dev);
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printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
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break;
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}
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if (found)
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return 0;
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return -ENXIO;
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}
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static void cleanup_card(struct net_device *dev)
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{
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/* Someday free_irq may be in ac_close_card() */
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free_irq(dev->irq, dev);
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release_region(dev->base_addr, AC_IO_EXTENT);
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iounmap(ei_status.mem);
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}
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void
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cleanup_module(void)
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{
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int this_dev;
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for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
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struct net_device *dev = dev_ac32[this_dev];
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if (dev) {
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unregister_netdev(dev);
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cleanup_card(dev);
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free_netdev(dev);
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}
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}
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}
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#endif /* MODULE */
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