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path: root/drivers/net/smc-ultra.c
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Diffstat (limited to 'drivers/net/smc-ultra.c')
-rw-r--r--drivers/net/smc-ultra.c615
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diff --git a/drivers/net/smc-ultra.c b/drivers/net/smc-ultra.c
new file mode 100644
index 00000000000..b564c677c6d
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+++ b/drivers/net/smc-ultra.c
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+/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
+/*
+ This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
+
+ Written 1993-1998 by Donald Becker.
+
+ Copyright 1993 United States Government as represented by the
+ Director, National Security Agency.
+
+ This software may be used and distributed according to the terms
+ of the GNU General Public License, incorporated herein by reference.
+
+ The author may be reached as becker@scyld.com, or C/O
+ Scyld Computing Corporation
+ 410 Severn Ave., Suite 210
+ Annapolis MD 21403
+
+ This driver uses the cards in the 8390-compatible mode.
+ Most of the run-time complexity is handled by the generic code in
+ 8390.c. The code in this file is responsible for
+
+ ultra_probe() Detecting and initializing the card.
+ ultra_probe1()
+ ultra_probe_isapnp()
+
+ ultra_open() The card-specific details of starting, stopping
+ ultra_reset_8390() and resetting the 8390 NIC core.
+ ultra_close()
+
+ ultra_block_input() Routines for reading and writing blocks of
+ ultra_block_output() packet buffer memory.
+ ultra_pio_input()
+ ultra_pio_output()
+
+ This driver enables the shared memory only when doing the actual data
+ transfers to avoid a bug in early version of the card that corrupted
+ data transferred by a AHA1542.
+
+ This driver now supports the programmed-I/O (PIO) data transfer mode of
+ the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
+ That support (if available) is in smc-ez.c.
+
+ Changelog:
+
+ Paul Gortmaker : multiple card support for module users.
+ Donald Becker : 4/17/96 PIO support, minor potential problems avoided.
+ Donald Becker : 6/6/96 correctly set auto-wrap bit.
+ Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
+
+ Note about the ISA PnP support:
+
+ This driver can not autoprobe for more than one SMC EtherEZ PnP card.
+ You have to configure the second card manually through the /proc/isapnp
+ interface and then load the module with an explicit io=0x___ option.
+*/
+
+static const char version[] =
+ "smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/isapnp.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include "8390.h"
+
+#define DRV_NAME "smc-ultra"
+
+/* A zero-terminated list of I/O addresses to be probed. */
+static unsigned int ultra_portlist[] __initdata =
+{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
+
+static int ultra_probe1(struct net_device *dev, int ioaddr);
+
+#ifdef __ISAPNP__
+static int ultra_probe_isapnp(struct net_device *dev);
+#endif
+
+static int ultra_open(struct net_device *dev);
+static void ultra_reset_8390(struct net_device *dev);
+static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+ int ring_page);
+static void ultra_block_input(struct net_device *dev, int count,
+ struct sk_buff *skb, int ring_offset);
+static void ultra_block_output(struct net_device *dev, int count,
+ const unsigned char *buf, const int start_page);
+static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+ int ring_page);
+static void ultra_pio_input(struct net_device *dev, int count,
+ struct sk_buff *skb, int ring_offset);
+static void ultra_pio_output(struct net_device *dev, int count,
+ const unsigned char *buf, const int start_page);
+static int ultra_close_card(struct net_device *dev);
+
+#ifdef __ISAPNP__
+static struct isapnp_device_id ultra_device_ids[] __initdata = {
+ { ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
+ ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
+ (long) "SMC EtherEZ (8416)" },
+ { } /* terminate list */
+};
+
+MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
+#endif
+
+
+#define START_PG 0x00 /* First page of TX buffer */
+
+#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
+#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
+#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
+#define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */
+#define IOPA 0x07 /* I/O Pipe Address for PIO operation. */
+#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
+#define ULTRA_IO_EXTENT 32
+#define EN0_ERWCNT 0x08 /* Early receive warning count. */
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void ultra_poll(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ ei_interrupt(dev->irq, dev, NULL);
+ enable_irq(dev->irq);
+}
+#endif
+/* Probe for the Ultra. This looks like a 8013 with the station
+ address PROM at I/O ports <base>+8 to <base>+13, with a checksum
+ following.
+*/
+
+static int __init do_ultra_probe(struct net_device *dev)
+{
+ int i;
+ int base_addr = dev->base_addr;
+ int irq = dev->irq;
+
+ SET_MODULE_OWNER(dev);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = &ultra_poll;
+#endif
+ if (base_addr > 0x1ff) /* Check a single specified location. */
+ return ultra_probe1(dev, base_addr);
+ else if (base_addr != 0) /* Don't probe at all. */
+ return -ENXIO;
+
+#ifdef __ISAPNP__
+ /* Look for any installed ISAPnP cards */
+ if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
+ return 0;
+#endif
+
+ for (i = 0; ultra_portlist[i]; i++) {
+ dev->irq = irq;
+ if (ultra_probe1(dev, ultra_portlist[i]) == 0)
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+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);
+}
+
+#ifndef MODULE
+struct net_device * __init ultra_probe(int unit)
+{
+ struct net_device *dev = alloc_ei_netdev();
+ int err;
+
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+
+ err = do_ultra_probe(dev);
+ if (err)
+ goto out;
+ err = register_netdev(dev);
+ if (err)
+ goto out1;
+ return dev;
+out1:
+ cleanup_card(dev);
+out:
+ free_netdev(dev);
+ return ERR_PTR(err);
+}
+#endif
+
+static int __init ultra_probe1(struct net_device *dev, int ioaddr)
+{
+ int i, retval;
+ int checksum = 0;
+ const char *model_name;
+ unsigned char eeprom_irq = 0;
+ static unsigned version_printed;
+ /* Values from various config regs. */
+ unsigned char num_pages, irqreg, addr, piomode;
+ unsigned char idreg = inb(ioaddr + 7);
+ unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
+
+ if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
+ return -EBUSY;
+
+ /* Check the ID nibble. */
+ if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
+ && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
+ retval = -ENODEV;
+ goto out;
+ }
+
+ /* Select the station address register set. */
+ outb(reg4, ioaddr + 4);
+
+ for (i = 0; i < 8; i++)
+ checksum += inb(ioaddr + 8 + i);
+ if ((checksum & 0xff) != 0xFF) {
+ retval = -ENODEV;
+ goto out;
+ }
+
+ if (ei_debug && version_printed++ == 0)
+ printk(version);
+
+ model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
+
+ printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
+
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
+
+ /* Switch from the station address to the alternate register set and
+ read the useful registers there. */
+ outb(0x80 | reg4, ioaddr + 4);
+
+ /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
+ outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
+ piomode = inb(ioaddr + 0x8);
+ addr = inb(ioaddr + 0xb);
+ irqreg = inb(ioaddr + 0xd);
+
+ /* Switch back to the station address register set so that the MS-DOS driver
+ can find the card after a warm boot. */
+ outb(reg4, ioaddr + 4);
+
+ if (dev->irq < 2) {
+ unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
+ int irq;
+
+ /* The IRQ bits are split. */
+ irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
+
+ if (irq == 0) {
+ printk(", failed to detect IRQ line.\n");
+ retval = -EAGAIN;
+ goto out;
+ }
+ dev->irq = irq;
+ eeprom_irq = 1;
+ }
+
+ /* The 8390 isn't at the base address, so fake the offset */
+ dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
+
+ {
+ int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
+ short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
+
+ dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
+ num_pages = num_pages_tbl[(addr >> 4) & 3];
+ }
+
+ ei_status.name = model_name;
+ ei_status.word16 = 1;
+ ei_status.tx_start_page = START_PG;
+ ei_status.rx_start_page = START_PG + TX_PAGES;
+ ei_status.stop_page = num_pages;
+
+ ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
+ if (!ei_status.mem) {
+ printk(", failed to ioremap.\n");
+ retval = -ENOMEM;
+ goto out;
+ }
+
+ dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
+
+ if (piomode) {
+ printk(",%s IRQ %d programmed-I/O mode.\n",
+ eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
+ ei_status.block_input = &ultra_pio_input;
+ ei_status.block_output = &ultra_pio_output;
+ ei_status.get_8390_hdr = &ultra_pio_get_hdr;
+ } else {
+ printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
+ dev->irq, dev->mem_start, dev->mem_end-1);
+ ei_status.block_input = &ultra_block_input;
+ ei_status.block_output = &ultra_block_output;
+ ei_status.get_8390_hdr = &ultra_get_8390_hdr;
+ }
+ ei_status.reset_8390 = &ultra_reset_8390;
+ dev->open = &ultra_open;
+ dev->stop = &ultra_close_card;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = ei_poll;
+#endif
+ NS8390_init(dev, 0);
+
+ return 0;
+out:
+ release_region(ioaddr, ULTRA_IO_EXTENT);
+ return retval;
+}
+
+#ifdef __ISAPNP__
+static int __init ultra_probe_isapnp(struct net_device *dev)
+{
+ int i;
+
+ for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
+ struct pnp_dev *idev = NULL;
+
+ while ((idev = pnp_find_dev(NULL,
+ ultra_device_ids[i].vendor,
+ ultra_device_ids[i].function,
+ idev))) {
+ /* Avoid already found cards from previous calls */
+ if (pnp_device_attach(idev) < 0)
+ continue;
+ if (pnp_activate_dev(idev) < 0) {
+ __again:
+ pnp_device_detach(idev);
+ continue;
+ }
+ /* if no io and irq, search for next */
+ if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
+ goto __again;
+ /* found it */
+ dev->base_addr = pnp_port_start(idev, 0);
+ dev->irq = pnp_irq(idev, 0);
+ printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
+ (char *) ultra_device_ids[i].driver_data,
+ dev->base_addr, dev->irq);
+ if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
+ printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
+ pnp_device_detach(idev);
+ return -ENXIO;
+ }
+ ei_status.priv = (unsigned long)idev;
+ break;
+ }
+ if (!idev)
+ continue;
+ return 0;
+ }
+
+ return -ENODEV;
+}
+#endif
+
+static int
+ultra_open(struct net_device *dev)
+{
+ int retval;
+ int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+ unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
+ 0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
+
+ retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
+ if (retval)
+ return retval;
+
+ outb(0x00, ioaddr); /* Disable shared memory for safety. */
+ outb(0x80, ioaddr + 5);
+ /* Set the IRQ line. */
+ outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
+ outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
+ outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
+
+ if (ei_status.block_input == &ultra_pio_input) {
+ outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
+ outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
+ } else
+ outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
+ /* Set the early receive warning level in window 0 high enough not
+ to receive ERW interrupts. */
+ outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
+ outb(0xff, dev->base_addr + EN0_ERWCNT);
+ ei_open(dev);
+ return 0;
+}
+
+static void
+ultra_reset_8390(struct net_device *dev)
+{
+ int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
+
+ outb(ULTRA_RESET, cmd_port);
+ if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
+ ei_status.txing = 0;
+
+ outb(0x00, cmd_port); /* Disable shared memory for safety. */
+ outb(0x80, cmd_port + 5);
+ if (ei_status.block_input == &ultra_pio_input)
+ outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
+ else
+ outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
+
+ if (ei_debug > 1) printk("reset done\n");
+ return;
+}
+
+/* Grab the 8390 specific header. Similar to the block_input routine, but
+ we don't need to be concerned with ring wrap as the header will be at
+ the start of a page, so we optimize accordingly. */
+
+static void
+ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+ void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
+
+ outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
+#ifdef __BIG_ENDIAN
+ /* Officially this is what we are doing, but the readl() is faster */
+ /* unfortunately it isn't endian aware of the struct */
+ memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+ hdr->count = le16_to_cpu(hdr->count);
+#else
+ ((unsigned int*)hdr)[0] = readl(hdr_start);
+#endif
+ outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
+}
+
+/* Block input and output are easy on shared memory ethercards, the only
+ complication is when the ring buffer wraps. */
+
+static void
+ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
+{
+ void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
+
+ /* Enable shared memory. */
+ 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 {
+ /* Packet is in one chunk -- we can copy + cksum. */
+ eth_io_copy_and_sum(skb, xfer_start, count, 0);
+ }
+
+ 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 */
+
+ netif_stop_queue(dev);
+
+ if (ei_debug > 1)
+ printk("%s: Shutting down ethercard.\n", dev->name);
+
+ 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_PARM_DESC(io, "I/O base address(es)");
+MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
+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_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) {
+ if (register_netdev(dev) == 0) {
+ dev_ultra[found++] = dev;
+ continue;
+ }
+ cleanup_card(dev);
+ }
+ 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;
+}
+
+void
+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 */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-28 03:28:32 +0000