smc-ultra.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:18k
- /* 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/sched.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/init.h>
- #include <linux/isapnp.h>
- #include <asm/io.h>
- #include <asm/system.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include "8390.h"
- /* 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};
- int ultra_probe(struct net_device *dev);
- static int ultra_probe1(struct net_device *dev, int ioaddr);
- #if defined CONFIG_ISAPNP || defined CONFIG_ISAPNP_MODULE
- 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);
- #if defined CONFIG_ISAPNP || defined CONFIG_ISAPNP_MODULE
- 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. */
- /* 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.
- */
- int __init ultra_probe(struct net_device *dev)
- {
- int i;
- int base_addr = dev->base_addr;
- SET_MODULE_OWNER(dev);
- 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;
- #if defined CONFIG_ISAPNP || defined CONFIG_ISAPNP_MODULE
- /* Look for any installed ISAPnP cards */
- if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
- return 0;
- printk(KERN_NOTICE "smc-ultra.c: No ISAPnP cards found, trying standard ones...n");
- #endif
- for (i = 0; ultra_portlist[i]; i++)
- if (ultra_probe1(dev, ultra_portlist[i]) == 0)
- return 0;
- return -ENODEV;
- }
- 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, dev->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;
- }
- /* Allocate dev->priv and fill in 8390 specific dev fields. */
- if (ethdev_init(dev)) {
- printk (", no memory for dev->priv.n");
- retval = -ENOMEM;
- goto out;
- }
- /* 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;
- dev->rmem_start = dev->mem_start + TX_PAGES*256;
- dev->mem_end = dev->rmem_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;
- NS8390_init(dev, 0);
- return 0;
- out:
- release_region(ioaddr, ULTRA_IO_EXTENT);
- return retval;
- }
- #if defined CONFIG_ISAPNP || defined CONFIG_ISAPNP_MODULE
- static int __init ultra_probe_isapnp(struct net_device *dev)
- {
- int i;
- for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
- struct pci_dev *idev = NULL;
- while ((idev = isapnp_find_dev(NULL,
- ultra_device_ids[i].vendor,
- ultra_device_ids[i].function,
- idev))) {
- /* Avoid already found cards from previous calls */
- if (idev->prepare(idev))
- continue;
- if (idev->activate(idev))
- continue;
- /* if no irq, search for next */
- if (idev->irq_resource[0].start == 0)
- continue;
- /* found it */
- dev->base_addr = idev->resource[0].start;
- dev->irq = idev->irq_resource[0].start;
- 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); 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 donen");
- 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)
- {
- unsigned long hdr_start = dev->mem_start + ((ring_page - START_PG)<<8);
- outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
- #ifdef notdef
- /* Officially this is what we are doing, but the readl() is faster */
- isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
- #else
- ((unsigned int*)hdr)[0] = isa_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)
- {
- unsigned long xfer_start = dev->mem_start + ring_offset - (START_PG<<8);
- /* Enable shared memory. */
- outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
- if (xfer_start + count > dev->rmem_end) {
- /* We must wrap the input move. */
- int semi_count = dev->rmem_end - xfer_start;
- isa_memcpy_fromio(skb->data, xfer_start, semi_count);
- count -= semi_count;
- isa_memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
- } else {
- /* Packet is in one chunk -- we can copy + cksum. */
- isa_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)
- {
- unsigned long shmem = dev->mem_start + ((start_page - START_PG)<<8);
- /* Enable shared memory. */
- outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
- isa_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_PARM(io, "1-" __MODULE_STRING(MAX_ULTRA_CARDS) "i");
- MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_ULTRA_CARDS) "i");
- MODULE_PARM_DESC(io, "SMC Ultra I/O base address(es)");
- MODULE_PARM_DESC(irq, "SMC Ultra IRQ number(s) (assigned)");
- EXPORT_NO_SYMBOLS;
- /* 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)
- {
- int this_dev, found = 0;
- for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
- struct net_device *dev = &dev_ultra[this_dev];
- dev->irq = irq[this_dev];
- dev->base_addr = io[this_dev];
- dev->init = ultra_probe;
- 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");
- }
- if (register_netdev(dev) != 0) {
- printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).n", io[this_dev]);
- if (found != 0) return 0; /* Got at least one. */
- return -ENXIO;
- }
- found++;
- }
- return 0;
- }
- 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->priv != NULL) {
- /* NB: ultra_close_card() does free_irq */
- int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
- #if defined CONFIG_ISAPNP || defined CONFIG_ISAPNP_MODULE
- struct pci_dev *idev = (struct pci_dev *)ei_status.priv;
- if (idev)
- idev->deactivate(idev);
- #endif
- unregister_netdev(dev);
- release_region(ioaddr, ULTRA_IO_EXTENT);
- kfree(dev->priv);
- }
- }
- }
- #endif /* MODULE */
- MODULE_LICENSE("GPL");
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
- * version-control: t
- * kept-new-versions: 5
- * c-indent-level: 4
- * c-basic-offset: 4
- * tab-width: 4
- * End:
- */