forked from Minki/linux
486 lines
14 KiB
C
486 lines
14 KiB
C
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/* e2100.c: A Cabletron E2100 series ethernet driver for linux. */
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/*
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Written 1993-1994 by Donald Becker.
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Copyright 1994 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency. This software may be used and
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distributed according to the terms of the GNU General Public License,
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incorporated herein by reference.
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This is a driver for the Cabletron E2100 series ethercards.
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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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The E2100 series ethercard is a fairly generic shared memory 8390
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implementation. The only unusual aspect is the way the shared memory
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registers are set: first you do an inb() in what is normally the
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station address region, and the low three bits of next outb() *address*
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is used as the write value for that register. Either someone wasn't
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too used to dem bit en bites, or they were trying to obfuscate the
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programming interface.
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There is an additional complication when setting the window on the packet
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buffer. You must first do a read into the packet buffer region with the
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low 8 address bits the address setting the page for the start of the packet
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buffer window, and then do the above operation. See mem_on() for details.
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One bug on the chip is that even a hard reset won't disable the memory
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window, usually resulting in a hung machine if mem_off() isn't called.
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If this happens, you must power down the machine for about 30 seconds.
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*/
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static const char version[] =
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"e2100.c:v1.01 7/21/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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#include <linux/module.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/ioport.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 <linux/delay.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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#define DRV_NAME "e2100"
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static int e21_probe_list[] = {0x300, 0x280, 0x380, 0x220, 0};
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/* Offsets from the base_addr.
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Read from the ASIC register, and the low three bits of the next outb()
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address is used to set the corresponding register. */
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#define E21_NIC_OFFSET 0 /* Offset to the 8390 NIC. */
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#define E21_ASIC 0x10
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#define E21_MEM_ENABLE 0x10
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#define E21_MEM_ON 0x05 /* Enable memory in 16 bit mode. */
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#define E21_MEM_ON_8 0x07 /* Enable memory in 8 bit mode. */
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#define E21_MEM_BASE 0x11
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#define E21_IRQ_LOW 0x12 /* The low three bits of the IRQ number. */
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#define E21_IRQ_HIGH 0x14 /* The high IRQ bit and media select ... */
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#define E21_MEDIA 0x14 /* (alias). */
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#define E21_ALT_IFPORT 0x02 /* Set to use the other (BNC,AUI) port. */
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#define E21_BIG_MEM 0x04 /* Use a bigger (64K) buffer (we don't) */
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#define E21_SAPROM 0x10 /* Offset to station address data. */
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#define E21_IO_EXTENT 0x20
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static inline void mem_on(short port, volatile char __iomem *mem_base,
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unsigned char start_page )
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{
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/* This is a little weird: set the shared memory window by doing a
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read. The low address bits specify the starting page. */
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readb(mem_base+start_page);
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inb(port + E21_MEM_ENABLE);
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outb(E21_MEM_ON, port + E21_MEM_ENABLE + E21_MEM_ON);
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}
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static inline void mem_off(short port)
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{
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inb(port + E21_MEM_ENABLE);
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outb(0x00, port + E21_MEM_ENABLE);
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}
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/* In other drivers I put the TX pages first, but the E2100 window circuitry
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is designed to have a 4K Tx region last. The windowing circuitry wraps the
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window at 0x2fff->0x0000 so that the packets at e.g. 0x2f00 in the RX ring
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appear contiguously in the window. */
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#define E21_RX_START_PG 0x00 /* First page of RX buffer */
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#define E21_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
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#define E21_BIG_RX_STOP_PG 0xF0 /* Last page +1 of RX ring */
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#define E21_TX_START_PG E21_RX_STOP_PG /* First page of TX buffer */
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static int e21_probe1(struct net_device *dev, int ioaddr);
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static int e21_open(struct net_device *dev);
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static void e21_reset_8390(struct net_device *dev);
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static void e21_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 e21_block_output(struct net_device *dev, int count,
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const unsigned char *buf, int start_page);
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static void e21_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 e21_close(struct net_device *dev);
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/* Probe for the E2100 series ethercards. These cards have an 8390 at the
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base address and the station address at both offset 0x10 and 0x18. I read
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the station address from offset 0x18 to avoid the dataport of NE2000
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ethercards, and look for Ctron's unique ID (first three octets of the
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station address).
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*/
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static int __init do_e2100_probe(struct net_device *dev)
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{
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int *port;
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int base_addr = dev->base_addr;
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int irq = dev->irq;
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SET_MODULE_OWNER(dev);
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if (base_addr > 0x1ff) /* Check a single specified location. */
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return e21_probe1(dev, base_addr);
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else if (base_addr != 0) /* Don't probe at all. */
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return -ENXIO;
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for (port = e21_probe_list; *port; port++) {
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dev->irq = irq;
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if (e21_probe1(dev, *port) == 0)
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return 0;
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}
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return -ENODEV;
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}
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static void cleanup_card(struct net_device *dev)
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{
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/* NB: e21_close() handles free_irq */
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iounmap(ei_status.mem);
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release_region(dev->base_addr, E21_IO_EXTENT);
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}
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#ifndef MODULE
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struct net_device * __init e2100_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_e2100_probe(dev);
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if (err)
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goto out;
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err = register_netdev(dev);
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if (err)
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goto out1;
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return dev;
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out1:
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cleanup_card(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 e21_probe1(struct net_device *dev, int ioaddr)
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{
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int i, status, retval;
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unsigned char *station_addr = dev->dev_addr;
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static unsigned version_printed;
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if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
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return -EBUSY;
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/* First check the station address for the Ctron prefix. */
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if (inb(ioaddr + E21_SAPROM + 0) != 0x00
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|| inb(ioaddr + E21_SAPROM + 1) != 0x00
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|| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
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retval = -ENODEV;
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goto out;
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}
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/* Verify by making certain that there is a 8390 at there. */
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outb(E8390_NODMA + E8390_STOP, ioaddr);
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udelay(1); /* we want to delay one I/O cycle - which is 2MHz */
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status = inb(ioaddr);
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if (status != 0x21 && status != 0x23) {
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retval = -ENODEV;
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goto out;
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}
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/* Read the station address PROM. */
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for (i = 0; i < 6; i++)
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station_addr[i] = inb(ioaddr + E21_SAPROM + i);
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inb(ioaddr + E21_MEDIA); /* Point to media selection. */
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outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */
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if (ei_debug && version_printed++ == 0)
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printk(version);
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for (i = 0; i < 6; i++)
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printk(" %02X", station_addr[i]);
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if (dev->irq < 2) {
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int irqlist[] = {15,11,10,12,5,9,3,4}, i;
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for (i = 0; i < 8; i++)
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if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
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dev->irq = irqlist[i];
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break;
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}
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if (i >= 8) {
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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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} else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */
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dev->irq = 9;
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/* The 8390 is at the base address. */
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dev->base_addr = ioaddr;
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ei_status.name = "E2100";
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ei_status.word16 = 1;
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ei_status.tx_start_page = E21_TX_START_PG;
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ei_status.rx_start_page = E21_RX_START_PG;
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ei_status.stop_page = E21_RX_STOP_PG;
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ei_status.saved_irq = dev->irq;
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/* Check the media port used. The port can be passed in on the
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low mem_end bits. */
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if (dev->mem_end & 15)
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dev->if_port = dev->mem_end & 7;
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else {
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dev->if_port = 0;
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inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */
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for(i = 0; i < 6; i++)
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if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
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dev->if_port = 1;
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break;
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}
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}
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/* Never map in the E21 shared memory unless you are actively using it.
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Also, the shared memory has effective only one setting -- spread all
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over the 128K region! */
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if (dev->mem_start == 0)
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dev->mem_start = 0xd0000;
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ei_status.mem = ioremap(dev->mem_start, 2*1024);
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if (!ei_status.mem) {
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printk("unable to remap memory\n");
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retval = -EAGAIN;
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goto out;
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}
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#ifdef notdef
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/* These values are unused. The E2100 has a 2K window into the packet
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buffer. The window can be set to start on any page boundary. */
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ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
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dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
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#endif
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printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
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dev->if_port ? "secondary" : "primary", dev->mem_start);
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ei_status.reset_8390 = &e21_reset_8390;
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ei_status.block_input = &e21_block_input;
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ei_status.block_output = &e21_block_output;
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ei_status.get_8390_hdr = &e21_get_8390_hdr;
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dev->open = &e21_open;
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dev->stop = &e21_close;
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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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return 0;
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out:
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release_region(ioaddr, E21_IO_EXTENT);
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return retval;
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}
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static int
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e21_open(struct net_device *dev)
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{
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short ioaddr = dev->base_addr;
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int retval;
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if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
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return retval;
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/* Set the interrupt line and memory base on the hardware. */
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inb(ioaddr + E21_IRQ_LOW);
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outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
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inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
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outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
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+ (dev->if_port ? E21_ALT_IFPORT : 0));
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inb(ioaddr + E21_MEM_BASE);
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outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));
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ei_open(dev);
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return 0;
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}
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static void
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e21_reset_8390(struct net_device *dev)
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{
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short ioaddr = dev->base_addr;
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outb(0x01, ioaddr);
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if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
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ei_status.txing = 0;
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/* Set up the ASIC registers, just in case something changed them. */
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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. We put the 2k window so the header page
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appears at the start of the shared memory. */
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static void
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e21_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
short ioaddr = dev->base_addr;
|
|||
|
|
char __iomem *shared_mem = ei_status.mem;
|
|||
|
|
|
|||
|
|
mem_on(ioaddr, shared_mem, ring_page);
|
|||
|
|
|
|||
|
|
#ifdef notdef
|
|||
|
|
/* Officially this is what we are doing, but the readl() is faster */
|
|||
|
|
memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
|
|||
|
|
#else
|
|||
|
|
((unsigned int*)hdr)[0] = readl(shared_mem);
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Turn off memory access: we would need to reprogram the window anyway. */
|
|||
|
|
mem_off(ioaddr);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Block input and output are easy on shared memory ethercards.
|
|||
|
|
The E21xx makes block_input() especially easy by wrapping the top
|
|||
|
|
ring buffer to the bottom automatically. */
|
|||
|
|
static void
|
|||
|
|
e21_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
|
|||
|
|
{
|
|||
|
|
short ioaddr = dev->base_addr;
|
|||
|
|
char __iomem *shared_mem = ei_status.mem;
|
|||
|
|
|
|||
|
|
mem_on(ioaddr, shared_mem, (ring_offset>>8));
|
|||
|
|
|
|||
|
|
/* Packet is always in one chunk -- we can copy + cksum. */
|
|||
|
|
eth_io_copy_and_sum(skb, ei_status.mem + (ring_offset & 0xff), count, 0);
|
|||
|
|
|
|||
|
|
mem_off(ioaddr);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
e21_block_output(struct net_device *dev, int count, const unsigned char *buf,
|
|||
|
|
int start_page)
|
|||
|
|
{
|
|||
|
|
short ioaddr = dev->base_addr;
|
|||
|
|
volatile char __iomem *shared_mem = ei_status.mem;
|
|||
|
|
|
|||
|
|
/* Set the shared memory window start by doing a read, with the low address
|
|||
|
|
bits specifying the starting page. */
|
|||
|
|
readb(shared_mem + start_page);
|
|||
|
|
mem_on(ioaddr, shared_mem, start_page);
|
|||
|
|
|
|||
|
|
memcpy_toio(shared_mem, buf, count);
|
|||
|
|
mem_off(ioaddr);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static int
|
|||
|
|
e21_close(struct net_device *dev)
|
|||
|
|
{
|
|||
|
|
short ioaddr = dev->base_addr;
|
|||
|
|
|
|||
|
|
if (ei_debug > 1)
|
|||
|
|
printk("%s: Shutting down ethercard.\n", dev->name);
|
|||
|
|
|
|||
|
|
free_irq(dev->irq, dev);
|
|||
|
|
dev->irq = ei_status.saved_irq;
|
|||
|
|
|
|||
|
|
/* Shut off the interrupt line and secondary interface. */
|
|||
|
|
inb(ioaddr + E21_IRQ_LOW);
|
|||
|
|
outb(0, ioaddr + E21_ASIC);
|
|||
|
|
inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
|
|||
|
|
outb(0, ioaddr + E21_ASIC);
|
|||
|
|
|
|||
|
|
ei_close(dev);
|
|||
|
|
|
|||
|
|
/* Double-check that the memory has been turned off, because really
|
|||
|
|
really bad things happen if it isn't. */
|
|||
|
|
mem_off(ioaddr);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
#ifdef MODULE
|
|||
|
|
#define MAX_E21_CARDS 4 /* Max number of E21 cards per module */
|
|||
|
|
static struct net_device *dev_e21[MAX_E21_CARDS];
|
|||
|
|
static int io[MAX_E21_CARDS];
|
|||
|
|
static int irq[MAX_E21_CARDS];
|
|||
|
|
static int mem[MAX_E21_CARDS];
|
|||
|
|
static int xcvr[MAX_E21_CARDS]; /* choose int. or ext. xcvr */
|
|||
|
|
|
|||
|
|
module_param_array(io, int, NULL, 0);
|
|||
|
|
module_param_array(irq, int, NULL, 0);
|
|||
|
|
module_param_array(mem, int, NULL, 0);
|
|||
|
|
module_param_array(xcvr, int, NULL, 0);
|
|||
|
|
MODULE_PARM_DESC(io, "I/O base address(es)");
|
|||
|
|
MODULE_PARM_DESC(irq, "IRQ number(s)");
|
|||
|
|
MODULE_PARM_DESC(mem, " memory base address(es)");
|
|||
|
|
MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
|
|||
|
|
MODULE_DESCRIPTION("Cabletron E2100 ISA ethernet driver");
|
|||
|
|
MODULE_LICENSE("GPL");
|
|||
|
|
|
|||
|
|
/* This is set up so that only a single autoprobe takes place per call.
|
|||
|
|
ISA device autoprobes on a running machine are not recommended. */
|
|||
|
|
int
|
|||
|
|
init_module(void)
|
|||
|
|
{
|
|||
|
|
struct net_device *dev;
|
|||
|
|
int this_dev, found = 0;
|
|||
|
|
|
|||
|
|
for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
|
|||
|
|
if (io[this_dev] == 0) {
|
|||
|
|
if (this_dev != 0) break; /* only autoprobe 1st one */
|
|||
|
|
printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n");
|
|||
|
|
}
|
|||
|
|
dev = alloc_ei_netdev();
|
|||
|
|
if (!dev)
|
|||
|
|
break;
|
|||
|
|
dev->irq = irq[this_dev];
|
|||
|
|
dev->base_addr = io[this_dev];
|
|||
|
|
dev->mem_start = mem[this_dev];
|
|||
|
|
dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
|
|||
|
|
if (do_e2100_probe(dev) == 0) {
|
|||
|
|
if (register_netdev(dev) == 0) {
|
|||
|
|
dev_e21[found++] = dev;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
cleanup_card(dev);
|
|||
|
|
}
|
|||
|
|
free_netdev(dev);
|
|||
|
|
printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
if (found)
|
|||
|
|
return 0;
|
|||
|
|
return -ENXIO;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void
|
|||
|
|
cleanup_module(void)
|
|||
|
|
{
|
|||
|
|
int this_dev;
|
|||
|
|
|
|||
|
|
for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
|
|||
|
|
struct net_device *dev = dev_e21[this_dev];
|
|||
|
|
if (dev) {
|
|||
|
|
unregister_netdev(dev);
|
|||
|
|
cleanup_card(dev);
|
|||
|
|
free_netdev(dev);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#endif /* MODULE */
|