ac3200.c
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上传日期:2013-02-24
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- /* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
- /*
- Written 1993, 1994 by Donald Becker.
- Copyright 1993 United States Government as represented by the Director,
- National Security Agency. This software may only be used and distributed
- according to the terms of the GNU General Public License as modified by SRC,
- 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 is driver for the Ansel Communications Model 3200 EISA Ethernet LAN
- Adapter. The programming information is from the users manual, as related
- by glee@ardnassak.math.clemson.edu.
- Changelog:
- Paul Gortmaker 05/98 : add support for shared mem above 1MB.
- */
- static const char version[] =
- "ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)n";
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/init.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include "8390.h"
- /* Offsets from the base address. */
- #define AC_NIC_BASE 0x00
- #define AC_SA_PROM 0x16 /* The station address PROM. */
- #define AC_ADDR0 0x00 /* Prefix station address values. */
- #define AC_ADDR1 0x40
- #define AC_ADDR2 0x90
- #define AC_ID_PORT 0xC80
- #define AC_EISA_ID 0x0110d305
- #define AC_RESET_PORT 0xC84
- #define AC_RESET 0x00
- #define AC_ENABLE 0x01
- #define AC_CONFIG 0xC90 /* The configuration port. */
- #define AC_IO_EXTENT 0x20
- /* Actually accessed is:
- * AC_NIC_BASE (0-15)
- * AC_SA_PROM (0-5)
- * AC_ID_PORT (0-3)
- * AC_RESET_PORT
- * AC_CONFIG
- */
- /* Decoding of the configuration register. */
- static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
- static int addrmap[8] =
- {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
- static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
- #define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
- #define config2mem(configval) addrmap[(configval) & 7]
- #define config2name(configval) port_name[((configval) >> 6) & 3]
- /* First and last 8390 pages. */
- #define AC_START_PG 0x00 /* First page of 8390 TX buffer */
- #define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
- int ac3200_probe(struct net_device *dev);
- static int ac_probe1(int ioaddr, struct net_device *dev);
- static int ac_open(struct net_device *dev);
- static void ac_reset_8390(struct net_device *dev);
- static void ac_block_input(struct net_device *dev, int count,
- struct sk_buff *skb, int ring_offset);
- static void ac_block_output(struct net_device *dev, const int count,
- const unsigned char *buf, const int start_page);
- static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
- int ring_page);
- static int ac_close_card(struct net_device *dev);
- /* Probe for the AC3200.
- The AC3200 can be identified by either the EISA configuration registers,
- or the unique value in the station address PROM.
- */
- int __init ac3200_probe(struct net_device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
- SET_MODULE_OWNER(dev);
- if (ioaddr > 0x1ff) /* Check a single specified location. */
- return ac_probe1(ioaddr, dev);
- else if (ioaddr > 0) /* Don't probe at all. */
- return -ENXIO;
- if ( ! EISA_bus)
- return -ENXIO;
- for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000)
- if (ac_probe1(ioaddr, dev) == 0)
- return 0;
- return -ENODEV;
- }
- static int __init ac_probe1(int ioaddr, struct net_device *dev)
- {
- int i, retval;
- if (!request_region(ioaddr, AC_IO_EXTENT, dev->name))
- return -EBUSY;
- if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
- retval = -ENODEV;
- goto out;
- }
- if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
- retval = -ENODEV;
- goto out;
- }
- #ifndef final_version
- printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
- " EISA ID %02x %02x %02x %02x.n", inb(ioaddr + AC_CONFIG),
- inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
- inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
- #endif
- printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
- for(i = 0; i < 6; i++)
- printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
- #if 0
- /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
- if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
- || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
- || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
- printk(", not found (invalid prefix).n");
- retval = -ENODEV;
- goto out;
- }
- #endif
- /* Allocate dev->priv and fill in 8390 specific dev fields. */
- if (ethdev_init(dev)) {
- printk (", unable to allocate memory for dev->priv.n");
- retval = -ENOMEM;
- goto out;
- }
- /* Assign and allocate the interrupt now. */
- if (dev->irq == 0) {
- dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
- printk(", using");
- } else {
- dev->irq = irq_cannonicalize(dev->irq);
- printk(", assigning");
- }
- retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
- if (retval) {
- printk (" nothing! Unable to get IRQ %d.n", dev->irq);
- goto out1;
- }
- printk(" IRQ %d, %s portn", dev->irq, port_name[dev->if_port]);
- dev->base_addr = ioaddr;
- #ifdef notyet
- if (dev->mem_start) { /* Override the value from the board. */
- for (i = 0; i < 7; i++)
- if (addrmap[i] == dev->mem_start)
- break;
- if (i >= 7)
- i = 0;
- outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
- }
- #endif
- dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
- dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
- printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.n",
- dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
- /*
- * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
- * the card mem within the region covered by `normal' RAM !!!
- */
- if (dev->mem_start > 1024*1024) { /* phys addr > 1MB */
- if (dev->mem_start < virt_to_bus(high_memory)) {
- printk(KERN_CRIT "ac3200.c: Card RAM overlaps with normal memory!!!n");
- printk(KERN_CRIT "ac3200.c: Use EISA SCU to set card memory below 1MB,n");
- printk(KERN_CRIT "ac3200.c: or to an address above 0x%lx.n", virt_to_bus(high_memory));
- printk(KERN_CRIT "ac3200.c: Driver NOT installed.n");
- retval = -EINVAL;
- goto out2;
- }
- dev->mem_start = (unsigned long)ioremap(dev->mem_start, AC_STOP_PG*0x100);
- if (dev->mem_start == 0) {
- printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!n");
- printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.n");
- printk(KERN_ERR "ac3200.c: Driver NOT installed.n");
- retval = -EINVAL;
- goto out2;
- }
- ei_status.reg0 = 1; /* Use as remap flag */
- printk("ac3200.c: remapped %dkB card memory to virtual address %#lxn",
- AC_STOP_PG/4, dev->mem_start);
- }
- dev->rmem_start = dev->mem_start + TX_PAGES*256;
- dev->mem_end = dev->rmem_end = dev->mem_start
- + (AC_STOP_PG - AC_START_PG)*256;
- ei_status.name = "AC3200";
- ei_status.tx_start_page = AC_START_PG;
- ei_status.rx_start_page = AC_START_PG + TX_PAGES;
- ei_status.stop_page = AC_STOP_PG;
- ei_status.word16 = 1;
- if (ei_debug > 0)
- printk(version);
- ei_status.reset_8390 = &ac_reset_8390;
- ei_status.block_input = &ac_block_input;
- ei_status.block_output = &ac_block_output;
- ei_status.get_8390_hdr = &ac_get_8390_hdr;
- dev->open = &ac_open;
- dev->stop = &ac_close_card;
- NS8390_init(dev, 0);
- return 0;
- out2:
- free_irq(dev->irq, dev);
- out1:
- kfree(dev->priv);
- dev->priv = NULL;
- out:
- release_region(ioaddr, AC_IO_EXTENT);
- return retval;
- }
- static int ac_open(struct net_device *dev)
- {
- #ifdef notyet
- /* Someday we may enable the IRQ and shared memory here. */
- int ioaddr = dev->base_addr;
- #endif
- ei_open(dev);
- return 0;
- }
- static void ac_reset_8390(struct net_device *dev)
- {
- ushort ioaddr = dev->base_addr;
- outb(AC_RESET, ioaddr + AC_RESET_PORT);
- if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
- ei_status.txing = 0;
- outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
- 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
- ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
- {
- unsigned long hdr_start = dev->mem_start + ((ring_page - AC_START_PG)<<8);
- isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
- }
- /* Block input and output are easy on shared memory ethercards, the only
- complication is when the ring buffer wraps. */
- static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
- int ring_offset)
- {
- unsigned long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8);
- 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);
- }
- }
- static void ac_block_output(struct net_device *dev, int count,
- const unsigned char *buf, int start_page)
- {
- unsigned long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
- isa_memcpy_toio(shmem, buf, count);
- }
- static int ac_close_card(struct net_device *dev)
- {
- if (ei_debug > 1)
- printk("%s: Shutting down ethercard.n", dev->name);
- #ifdef notyet
- /* We should someday disable shared memory and interrupts. */
- outb(0x00, ioaddr + 6); /* Disable interrupts. */
- free_irq(dev->irq, dev);
- #endif
- ei_close(dev);
- return 0;
- }
- #ifdef MODULE
- #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
- static struct net_device dev_ac32[MAX_AC32_CARDS];
- static int io[MAX_AC32_CARDS];
- static int irq[MAX_AC32_CARDS];
- static int mem[MAX_AC32_CARDS];
- MODULE_PARM(io, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
- MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
- MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
- MODULE_PARM_DESC(io, "ac3200 I/O base adress(es)");
- MODULE_PARM_DESC(irq, "ac3200 IRQ number(s)");
- MODULE_PARM_DESC(mem, "ac3200 Memory base address(es)");
- int
- init_module(void)
- {
- int this_dev, found = 0;
- for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
- struct net_device *dev = &dev_ac32[this_dev];
- dev->irq = irq[this_dev];
- dev->base_addr = io[this_dev];
- dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
- dev->init = ac3200_probe;
- /* Default is to only install one card. */
- if (io[this_dev] == 0 && this_dev != 0) break;
- if (register_netdev(dev) != 0) {
- printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).n", io[this_dev]);
- if (found != 0) { /* Got at least one. */
- return 0;
- }
- return -ENXIO;
- }
- found++;
- }
- return 0;
- }
- void
- cleanup_module(void)
- {
- int this_dev;
- for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
- struct net_device *dev = &dev_ac32[this_dev];
- if (dev->priv != NULL) {
- /* Someday free_irq may be in ac_close_card() */
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, AC_IO_EXTENT);
- if (ei_status.reg0)
- iounmap((void *)dev->mem_start);
- unregister_netdev(dev);
- kfree(dev->priv);
- dev->priv = NULL;
- }
- }
- }
- #endif /* MODULE */
- MODULE_LICENSE("GPL");
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c ac3200.c"
- * version-control: t
- * kept-new-versions: 5
- * tab-width: 4
- * End:
- */