447 lines
12 KiB
C
447 lines
12 KiB
C
/*
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es3210.c
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Linux driver for Racal-Interlan ES3210 EISA Network Adapter
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Copyright (C) 1996, Paul Gortmaker.
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This software may be used and distributed according to the terms
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of the GNU General Public License, incorporated herein by reference.
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Information and Code Sources:
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1) The existing myriad of Linux 8390 drivers written by Donald Becker.
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2) Once again Russ Nelson's asm packet driver provided additional info.
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3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
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Too bad it doesn't work -- see below.
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The ES3210 is an EISA shared memory NS8390 implementation. Note
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that all memory copies to/from the board must be 32bit transfers.
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Which rules out using eth_io_copy_and_sum() in this driver.
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Apparently there are two slightly different revisions of the
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card, since there are two distinct EISA cfg files (!rii0101.cfg
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and !rii0102.cfg) One has media select in the cfg file and the
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other doesn't. Hopefully this will work with either.
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That is about all I can tell you about it, having never actually
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even seen one of these cards. :) Try http://www.interlan.com
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if you want more info.
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Thanks go to Mark Salazar for testing v0.02 of this driver.
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Bugs, to-fix, etc:
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1) The EISA cfg ports that are *supposed* to have the IRQ and shared
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mem values just read 0xff all the time. Hrrmpf. Apparently the
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same happens with the packet driver as the code for reading
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these registers is disabled there. In the meantime, boot with:
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ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and
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shared memory detection. (The i/o port detection is okay.)
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2) Module support currently untested. Probably works though.
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*/
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static const char version[] =
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"es3210.c: Driver revision v0.03, 14/09/96\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/init.h>
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include "8390.h"
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static int es_probe1(struct net_device *dev, int ioaddr);
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static void es_reset_8390(struct net_device *dev);
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static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
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static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
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static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page);
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#define ES_START_PG 0x00 /* First page of TX buffer */
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#define ES_STOP_PG 0x40 /* Last page +1 of RX ring */
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#define ES_IO_EXTENT 0x37 /* The cfg file says 0xc90 -> 0xcc7 */
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#define ES_ID_PORT 0xc80 /* Same for all EISA cards */
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#define ES_SA_PROM 0xc90 /* Start of e'net addr. */
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#define ES_RESET_PORT 0xc84 /* From the packet driver source */
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#define ES_NIC_OFFSET 0xca0 /* Hello, the 8390 is *here* */
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#define ES_ADDR0 0x02 /* 3 byte vendor prefix */
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#define ES_ADDR1 0x07
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#define ES_ADDR2 0x01
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/*
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* Two card revisions. EISA ID's are always rev. minor, rev. major,, and
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* then the three vendor letters stored in 5 bits each, with an "a" = 1.
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* For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
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* config utility determines automagically what config file(s) to use.
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*/
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#define ES_EISA_ID1 0x01012949 /* !rii0101.cfg */
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#define ES_EISA_ID2 0x02012949 /* !rii0102.cfg */
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#define ES_CFG1 0xcc0 /* IOPORT(1) --> IOPORT(6) in cfg file */
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#define ES_CFG2 0xcc1
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#define ES_CFG3 0xcc2
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#define ES_CFG4 0xcc3
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#define ES_CFG5 0xcc4
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#define ES_CFG6 0xc84 /* NB: 0xc84 is also "reset" port. */
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/*
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* You can OR any of the following bits together and assign it
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* to ES_DEBUG to get verbose driver info during operation.
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* Some of these don't do anything yet.
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*/
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#define ES_D_PROBE 0x01
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#define ES_D_RX_PKT 0x02
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#define ES_D_TX_PKT 0x04
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#define ED_D_IRQ 0x08
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#define ES_DEBUG 0
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static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10};
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static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15};
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/*
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* Probe for the card. The best way is to read the EISA ID if it
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* is known. Then we check the prefix of the station address
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* PROM for a match against the Racal-Interlan assigned value.
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*/
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static int __init do_es_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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if (ioaddr > 0x1ff) /* Check a single specified location. */
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return es_probe1(dev, ioaddr);
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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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#if ES_DEBUG & ES_D_PROBE
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printk("es3210.c: Not EISA bus. Not probing high ports.\n");
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#endif
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return -ENXIO;
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}
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/* EISA spec allows for up to 16 slots, but 8 is typical. */
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for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
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if (es_probe1(dev, ioaddr) == 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 es_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_es_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 es_probe1(struct net_device *dev, int ioaddr)
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{
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int i, retval;
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unsigned long eisa_id;
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if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210"))
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return -ENODEV;
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#if ES_DEBUG & ES_D_PROBE
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printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT));
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printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n",
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inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
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inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
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#endif
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/* Check the EISA ID of the card. */
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eisa_id = inl(ioaddr + ES_ID_PORT);
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if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
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retval = -ENODEV;
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goto out;
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}
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for (i = 0; i < ETHER_ADDR_LEN ; i++)
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dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i);
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/* Check the Racal vendor ID as well. */
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if (dev->dev_addr[0] != ES_ADDR0 ||
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dev->dev_addr[1] != ES_ADDR1 ||
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dev->dev_addr[2] != ES_ADDR2) {
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printk("es3210.c: card not found %pM (invalid_prefix).\n",
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dev->dev_addr);
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retval = -ENODEV;
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goto out;
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}
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printk("es3210.c: ES3210 rev. %ld at %#x, node %pM",
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eisa_id>>24, ioaddr, dev->dev_addr);
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/* Snarf the interrupt now. */
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if (dev->irq == 0) {
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unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
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unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
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if (hi_irq != 0) {
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dev->irq = hi_irq_map[hi_irq - 1];
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} else {
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int i = 0;
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while (lo_irq > (1<<i)) i++;
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dev->irq = lo_irq_map[i];
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}
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printk(" using IRQ %d", dev->irq);
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#if ES_DEBUG & ES_D_PROBE
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printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n",
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hi_irq, lo_irq, dev->irq);
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#endif
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} else {
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if (dev->irq == 2)
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dev->irq = 9; /* Doh! */
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printk(" assigning IRQ %d", dev->irq);
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}
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if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) {
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printk (" unable to get IRQ %d.\n", dev->irq);
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retval = -EAGAIN;
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goto out;
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}
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if (dev->mem_start == 0) {
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unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
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unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
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if (mem_enabled != 0x80) {
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printk(" shared mem disabled - giving up\n");
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retval = -ENXIO;
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goto out1;
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}
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dev->mem_start = 0xC0000 + mem_bits*0x4000;
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printk(" using ");
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} else {
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printk(" assigning ");
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}
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ei_status.mem = ioremap(dev->mem_start, (ES_STOP_PG - ES_START_PG)*256);
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if (!ei_status.mem) {
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printk("ioremap failed - giving up\n");
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retval = -ENXIO;
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goto out1;
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}
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dev->mem_end = dev->mem_start + (ES_STOP_PG - ES_START_PG)*256;
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printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1);
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#if ES_DEBUG & ES_D_PROBE
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if (inb(ioaddr + ES_CFG5))
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printk("es3210: Warning - DMA channel enabled, but not used here.\n");
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#endif
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/* Note, point at the 8390, and not the card... */
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dev->base_addr = ioaddr + ES_NIC_OFFSET;
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ei_status.name = "ES3210";
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ei_status.tx_start_page = ES_START_PG;
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ei_status.rx_start_page = ES_START_PG + TX_PAGES;
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ei_status.stop_page = ES_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 = &es_reset_8390;
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ei_status.block_input = &es_block_input;
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ei_status.block_output = &es_block_output;
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ei_status.get_8390_hdr = &es_get_8390_hdr;
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dev->netdev_ops = &ei_netdev_ops;
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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 out1;
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return 0;
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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 + ES_SA_PROM, ES_IO_EXTENT);
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return retval;
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}
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/*
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* Reset as per the packet driver method. Judging by the EISA cfg
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* file, this just toggles the "Board Enable" bits (bit 2 and 0).
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*/
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static void es_reset_8390(struct net_device *dev)
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{
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unsigned short ioaddr = dev->base_addr;
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unsigned long end;
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outb(0x04, ioaddr + ES_RESET_PORT);
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if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
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end = jiffies + 2*HZ/100;
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while ((signed)(end - jiffies) > 0) continue;
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ei_status.txing = 0;
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outb(0x01, ioaddr + ES_RESET_PORT);
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if (ei_debug > 1) printk("reset done\n");
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}
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/*
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* Note: In the following three functions is the implicit assumption
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* that the associated memcpy will only use "rep; movsl" as long as
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* we keep the counts as some multiple of doublewords. This is a
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* requirement of the hardware, and also prevents us from using
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* eth_io_copy_and_sum() since we can't guarantee it will limit
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* itself to doubleword access.
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*/
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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. (A single doubleword.)
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*/
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static void
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es_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 - ES_START_PG)<<8);
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memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
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hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */
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}
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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. The count will already
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* be rounded up to a doubleword value via es_get_8390_hdr() above.
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*/
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static void es_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 *xfer_start = ei_status.mem + ring_offset - ES_START_PG*256;
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if (ring_offset + count > ES_STOP_PG*256) {
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/* Packet wraps over end of ring buffer. */
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int semi_count = ES_STOP_PG*256 - ring_offset;
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memcpy_fromio(skb->data, xfer_start, semi_count);
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count -= semi_count;
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memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
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} else {
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/* Packet is in one chunk. */
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memcpy_fromio(skb->data, xfer_start, count);
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}
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}
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static void es_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 - ES_START_PG)<<8);
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count = (count + 3) & ~3; /* Round up to doubleword */
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memcpy_toio(shmem, buf, count);
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}
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#ifdef MODULE
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#define MAX_ES_CARDS 4 /* Max number of ES3210 cards per module */
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#define NAMELEN 8 /* # of chars for storing dev->name */
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static struct net_device *dev_es3210[MAX_ES_CARDS];
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static int io[MAX_ES_CARDS];
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static int irq[MAX_ES_CARDS];
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static int mem[MAX_ES_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("Racal-Interlan ES3210 EISA ethernet driver");
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MODULE_LICENSE("GPL");
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int __init 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_ES_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];
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if (do_es_probe(dev) == 0) {
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dev_es3210[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 "es3210.c: No es3210 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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free_irq(dev->irq, dev);
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release_region(dev->base_addr, ES_IO_EXTENT);
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iounmap(ei_status.mem);
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}
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void __exit
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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_ES_CARDS; this_dev++) {
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struct net_device *dev = dev_es3210[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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