632 lines
19 KiB
C
632 lines
19 KiB
C
/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
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/*
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This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
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Written 1993-1998 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency.
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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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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 driver uses the cards in the 8390-compatible mode.
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Most of the run-time complexity is handled by the generic code in
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8390.c. The code in this file is responsible for
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ultra_probe() Detecting and initializing the card.
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ultra_probe1()
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ultra_probe_isapnp()
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ultra_open() The card-specific details of starting, stopping
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ultra_reset_8390() and resetting the 8390 NIC core.
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ultra_close()
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ultra_block_input() Routines for reading and writing blocks of
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ultra_block_output() packet buffer memory.
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ultra_pio_input()
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ultra_pio_output()
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This driver enables the shared memory only when doing the actual data
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transfers to avoid a bug in early version of the card that corrupted
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data transferred by a AHA1542.
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This driver now supports the programmed-I/O (PIO) data transfer mode of
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the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
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That support (if available) is in smc-ez.c.
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Changelog:
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Paul Gortmaker : multiple card support for module users.
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Donald Becker : 4/17/96 PIO support, minor potential problems avoided.
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Donald Becker : 6/6/96 correctly set auto-wrap bit.
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Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
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Note about the ISA PnP support:
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This driver can not autoprobe for more than one SMC EtherEZ PnP card.
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You have to configure the second card manually through the /proc/isapnp
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interface and then load the module with an explicit io=0x___ option.
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*/
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static const char version[] =
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"smc-ultra.c:v2.02 2/3/98 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/init.h>
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#include <linux/interrupt.h>
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#include <linux/isapnp.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/irq.h>
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#include "8390.h"
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#define DRV_NAME "smc-ultra"
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/* A zero-terminated list of I/O addresses to be probed. */
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static unsigned int ultra_portlist[] __initdata =
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{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
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static int ultra_probe1(struct net_device *dev, int ioaddr);
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#ifdef __ISAPNP__
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static int ultra_probe_isapnp(struct net_device *dev);
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#endif
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static int ultra_open(struct net_device *dev);
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static void ultra_reset_8390(struct net_device *dev);
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static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
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int ring_page);
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static void ultra_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 ultra_block_output(struct net_device *dev, int count,
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const unsigned char *buf, const int start_page);
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static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
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int ring_page);
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static void ultra_pio_input(struct net_device *dev, int count,
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struct sk_buff *skb, int ring_offset);
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static void ultra_pio_output(struct net_device *dev, int count,
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const unsigned char *buf, const int start_page);
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static int ultra_close_card(struct net_device *dev);
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#ifdef __ISAPNP__
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static struct isapnp_device_id ultra_device_ids[] __initdata = {
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{ ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
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ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
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(long) "SMC EtherEZ (8416)" },
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{ } /* terminate list */
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};
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MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
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#endif
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static u32 ultra_msg_enable;
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#define START_PG 0x00 /* First page of TX buffer */
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#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
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#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
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#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
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#define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */
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#define IOPA 0x07 /* I/O Pipe Address for PIO operation. */
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#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
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#define ULTRA_IO_EXTENT 32
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#define EN0_ERWCNT 0x08 /* Early receive warning count. */
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#ifdef CONFIG_NET_POLL_CONTROLLER
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static void ultra_poll(struct net_device *dev)
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{
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disable_irq(dev->irq);
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ei_interrupt(dev->irq, dev);
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enable_irq(dev->irq);
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}
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#endif
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/* Probe for the Ultra. This looks like a 8013 with the station
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address PROM at I/O ports <base>+8 to <base>+13, with a checksum
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following.
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*/
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static int __init do_ultra_probe(struct net_device *dev)
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{
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int i;
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int base_addr = dev->base_addr;
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int irq = dev->irq;
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if (base_addr > 0x1ff) /* Check a single specified location. */
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return ultra_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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#ifdef __ISAPNP__
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/* Look for any installed ISAPnP cards */
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if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
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return 0;
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#endif
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for (i = 0; ultra_portlist[i]; i++) {
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dev->irq = irq;
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if (ultra_probe1(dev, ultra_portlist[i]) == 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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#ifndef MODULE
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struct net_device * __init ultra_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_ultra_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 const struct net_device_ops ultra_netdev_ops = {
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.ndo_open = ultra_open,
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.ndo_stop = ultra_close_card,
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.ndo_start_xmit = ei_start_xmit,
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.ndo_tx_timeout = ei_tx_timeout,
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.ndo_get_stats = ei_get_stats,
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.ndo_set_rx_mode = ei_set_multicast_list,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_change_mtu = eth_change_mtu,
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_poll_controller = ultra_poll,
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#endif
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};
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static int __init ultra_probe1(struct net_device *dev, int ioaddr)
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{
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int i, retval;
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int checksum = 0;
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const char *model_name;
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unsigned char eeprom_irq = 0;
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static unsigned version_printed;
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/* Values from various config regs. */
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unsigned char num_pages, irqreg, addr, piomode;
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unsigned char idreg = inb(ioaddr + 7);
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unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
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struct ei_device *ei_local = netdev_priv(dev);
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if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
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return -EBUSY;
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/* Check the ID nibble. */
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if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
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&& (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
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retval = -ENODEV;
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goto out;
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}
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/* Select the station address register set. */
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outb(reg4, ioaddr + 4);
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for (i = 0; i < 8; i++)
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checksum += inb(ioaddr + 8 + i);
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if ((checksum & 0xff) != 0xFF) {
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retval = -ENODEV;
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goto out;
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}
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if ((ultra_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
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netdev_info(dev, version);
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model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
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for (i = 0; i < 6; i++)
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dev->dev_addr[i] = inb(ioaddr + 8 + i);
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netdev_info(dev, "%s at %#3x, %pM", model_name,
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ioaddr, dev->dev_addr);
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/* Switch from the station address to the alternate register set and
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read the useful registers there. */
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outb(0x80 | reg4, ioaddr + 4);
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/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
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outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
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piomode = inb(ioaddr + 0x8);
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addr = inb(ioaddr + 0xb);
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irqreg = inb(ioaddr + 0xd);
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/* Switch back to the station address register set so that the MS-DOS driver
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can find the card after a warm boot. */
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outb(reg4, ioaddr + 4);
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if (dev->irq < 2) {
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unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
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int irq;
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/* The IRQ bits are split. */
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irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
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if (irq == 0) {
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pr_cont(", failed to detect IRQ line.\n");
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retval = -EAGAIN;
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goto out;
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}
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dev->irq = irq;
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eeprom_irq = 1;
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}
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/* The 8390 isn't at the base address, so fake the offset */
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dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
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{
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static const int addr_tbl[4] = {
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0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
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};
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static const short num_pages_tbl[4] = {
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0x20, 0x40, 0x80, 0xff
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};
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dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
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num_pages = num_pages_tbl[(addr >> 4) & 3];
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}
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ei_status.name = model_name;
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ei_status.word16 = 1;
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ei_status.tx_start_page = START_PG;
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ei_status.rx_start_page = START_PG + TX_PAGES;
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ei_status.stop_page = num_pages;
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ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
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if (!ei_status.mem) {
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pr_cont(", failed to ioremap.\n");
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retval = -ENOMEM;
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goto out;
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}
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dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
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if (piomode) {
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pr_cont(", %s IRQ %d programmed-I/O mode.\n",
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eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
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ei_status.block_input = &ultra_pio_input;
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ei_status.block_output = &ultra_pio_output;
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ei_status.get_8390_hdr = &ultra_pio_get_hdr;
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} else {
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pr_cont(", %s IRQ %d memory %#lx-%#lx.\n",
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eeprom_irq ? "" : "assigned ", dev->irq, dev->mem_start,
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dev->mem_end-1);
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ei_status.block_input = &ultra_block_input;
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ei_status.block_output = &ultra_block_output;
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ei_status.get_8390_hdr = &ultra_get_8390_hdr;
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}
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ei_status.reset_8390 = &ultra_reset_8390;
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dev->netdev_ops = &ultra_netdev_ops;
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NS8390_init(dev, 0);
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ei_local->msg_enable = ultra_msg_enable;
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retval = register_netdev(dev);
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if (retval)
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goto out;
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return 0;
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out:
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release_region(ioaddr, ULTRA_IO_EXTENT);
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return retval;
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}
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#ifdef __ISAPNP__
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static int __init ultra_probe_isapnp(struct net_device *dev)
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{
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int i;
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for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
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struct pnp_dev *idev = NULL;
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while ((idev = pnp_find_dev(NULL,
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ultra_device_ids[i].vendor,
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ultra_device_ids[i].function,
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idev))) {
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/* Avoid already found cards from previous calls */
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if (pnp_device_attach(idev) < 0)
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continue;
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if (pnp_activate_dev(idev) < 0) {
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__again:
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pnp_device_detach(idev);
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continue;
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}
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/* if no io and irq, search for next */
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if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
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goto __again;
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/* found it */
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dev->base_addr = pnp_port_start(idev, 0);
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dev->irq = pnp_irq(idev, 0);
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netdev_info(dev,
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"smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
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(char *) ultra_device_ids[i].driver_data,
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dev->base_addr, dev->irq);
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if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
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netdev_err(dev,
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"smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n",
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dev->base_addr);
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pnp_device_detach(idev);
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return -ENXIO;
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}
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ei_status.priv = (unsigned long)idev;
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break;
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}
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if (!idev)
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continue;
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return 0;
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}
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return -ENODEV;
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}
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#endif
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static int
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ultra_open(struct net_device *dev)
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{
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int retval;
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int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
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unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
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0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
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retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
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if (retval)
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return retval;
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outb(0x00, ioaddr); /* Disable shared memory for safety. */
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outb(0x80, ioaddr + 5);
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/* Set the IRQ line. */
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outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
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outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
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outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
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if (ei_status.block_input == &ultra_pio_input) {
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outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
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outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
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} else
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outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
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/* Set the early receive warning level in window 0 high enough not
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to receive ERW interrupts. */
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outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
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outb(0xff, dev->base_addr + EN0_ERWCNT);
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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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ultra_reset_8390(struct net_device *dev)
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{
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int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
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struct ei_device *ei_local = netdev_priv(dev);
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outb(ULTRA_RESET, cmd_port);
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netif_dbg(ei_local, hw, dev, "resetting Ultra, t=%ld...\n", jiffies);
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ei_status.txing = 0;
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outb(0x00, cmd_port); /* Disable shared memory for safety. */
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outb(0x80, cmd_port + 5);
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if (ei_status.block_input == &ultra_pio_input)
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outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
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else
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outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
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netif_dbg(ei_local, hw, dev, "reset done\n");
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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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ultra_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 - START_PG)<<8);
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outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
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#ifdef __BIG_ENDIAN
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/* Officially this is what we are doing, but the readl() is faster */
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/* unfortunately it isn't endian aware of the struct */
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memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
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hdr->count = le16_to_cpu(hdr->count);
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#else
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((unsigned int*)hdr)[0] = readl(hdr_start);
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#endif
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outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
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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
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ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
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{
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void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
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/* Enable shared memory. */
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outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
|
|
|
|
if (ring_offset + count > ei_status.stop_page*256) {
|
|
/* We must wrap the input move. */
|
|
int semi_count = ei_status.stop_page*256 - ring_offset;
|
|
memcpy_fromio(skb->data, xfer_start, semi_count);
|
|
count -= semi_count;
|
|
memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
|
|
} else {
|
|
memcpy_fromio(skb->data, xfer_start, count);
|
|
}
|
|
|
|
outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
|
|
}
|
|
|
|
static void
|
|
ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
|
|
int start_page)
|
|
{
|
|
void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
|
|
|
|
/* Enable shared memory. */
|
|
outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
|
|
|
|
memcpy_toio(shmem, buf, count);
|
|
|
|
outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
|
|
}
|
|
|
|
/* The identical operations for programmed I/O cards.
|
|
The PIO model is trivial to use: the 16 bit start address is written
|
|
byte-sequentially to IOPA, with no intervening I/O operations, and the
|
|
data is read or written to the IOPD data port.
|
|
The only potential complication is that the address register is shared
|
|
and must be always be rewritten between each read/write direction change.
|
|
This is no problem for us, as the 8390 code ensures that we are single
|
|
threaded. */
|
|
static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
|
|
int ring_page)
|
|
{
|
|
int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
|
|
outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
|
|
outb(ring_page, ioaddr + IOPA);
|
|
insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
|
|
}
|
|
|
|
static void ultra_pio_input(struct net_device *dev, int count,
|
|
struct sk_buff *skb, int ring_offset)
|
|
{
|
|
int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
|
|
char *buf = skb->data;
|
|
|
|
/* For now set the address again, although it should already be correct. */
|
|
outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
|
|
outb(ring_offset >> 8, ioaddr + IOPA);
|
|
/* We know skbuffs are padded to at least word alignment. */
|
|
insw(ioaddr + IOPD, buf, (count+1)>>1);
|
|
}
|
|
|
|
static void ultra_pio_output(struct net_device *dev, int count,
|
|
const unsigned char *buf, const int start_page)
|
|
{
|
|
int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
|
|
outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
|
|
outb(start_page, ioaddr + IOPA);
|
|
/* An extra odd byte is OK here as well. */
|
|
outsw(ioaddr + IOPD, buf, (count+1)>>1);
|
|
}
|
|
|
|
static int
|
|
ultra_close_card(struct net_device *dev)
|
|
{
|
|
int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
|
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
|
|
|
|
outb(0x00, ioaddr + 6); /* Disable interrupts. */
|
|
free_irq(dev->irq, dev);
|
|
|
|
NS8390_init(dev, 0);
|
|
|
|
/* We should someday disable shared memory and change to 8-bit mode
|
|
"just in case"... */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifdef MODULE
|
|
#define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
|
|
static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
|
|
static int io[MAX_ULTRA_CARDS];
|
|
static int irq[MAX_ULTRA_CARDS];
|
|
|
|
module_param_array(io, int, NULL, 0);
|
|
module_param_array(irq, int, NULL, 0);
|
|
module_param_named(msg_enable, ultra_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
|
|
MODULE_PARM_DESC(io, "I/O base address(es)");
|
|
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
|
|
MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
|
|
MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP 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
|
|
init_module(void)
|
|
{
|
|
struct net_device *dev;
|
|
int this_dev, found = 0;
|
|
|
|
for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
|
|
if (io[this_dev] == 0) {
|
|
if (this_dev != 0) break; /* only autoprobe 1st one */
|
|
printk(KERN_NOTICE "smc-ultra.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];
|
|
if (do_ultra_probe(dev) == 0) {
|
|
dev_ultra[found++] = dev;
|
|
continue;
|
|
}
|
|
free_netdev(dev);
|
|
printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
|
|
break;
|
|
}
|
|
if (found)
|
|
return 0;
|
|
return -ENXIO;
|
|
}
|
|
|
|
static void cleanup_card(struct net_device *dev)
|
|
{
|
|
/* NB: ultra_close_card() does free_irq */
|
|
#ifdef __ISAPNP__
|
|
struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
|
|
if (idev)
|
|
pnp_device_detach(idev);
|
|
#endif
|
|
release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
|
|
iounmap(ei_status.mem);
|
|
}
|
|
|
|
void __exit
|
|
cleanup_module(void)
|
|
{
|
|
int this_dev;
|
|
|
|
for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
|
|
struct net_device *dev = dev_ultra[this_dev];
|
|
if (dev) {
|
|
unregister_netdev(dev);
|
|
cleanup_card(dev);
|
|
free_netdev(dev);
|
|
}
|
|
}
|
|
}
|
|
#endif /* MODULE */
|