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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 Public License as modified by SRC,
- incorporated herein by reference.
-
- The author may be reached as becker@cesdis.gsfc.nasa.gov, or
- C/O Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
-
- 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.
- */
-
- static char *version =
- "ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
-
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <asm/system.h>
- #include <asm/io.h>
-
- #include <linux/netdevice.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 /* !!!!These are just guesses!!!! */
- #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. */
-
- /* Decoding of the configuration register. */
- static unsigned char config2irqmap[8] = {15, 12, 11, 10, 9, 7, 5, 3};
- static int addrmap[8] =
- {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
- static 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 device *dev);
- static int ac_probe1(int ioaddr, struct device *dev);
-
- static int ac_open(struct device *dev);
- static void ac_reset_8390(struct device *dev);
- static int ac_block_input(struct device *dev, int count,
- char *buf, int ring_offset);
- static void ac_block_output(struct device *dev, const int count,
- const unsigned char *buf, const int start_page);
- static int ac_close_card(struct 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 ac3200_probe(struct device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
-
- 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 you have a pre-pl15 machine you should delete this line. */
- if ( ! EISA_bus)
- return ENXIO;
-
- for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000)
- if (ac_probe1(ioaddr, dev) == 0)
- return 0;
-
- return ENODEV;
- }
-
- static int ac_probe1(int ioaddr, struct device *dev)
- {
- int i;
-
- #ifndef final_version
- printk("AC3200 ethercard probe at %#3x:", ioaddr);
-
- for(i = 0; i < 6; i++)
- printk(" %02x", inb(ioaddr + AC_SA_PROM + i));
- #endif
-
- /* !!!!The values of AC_ADDRn (see above) should be corrected when we
- find out the correct station address prefix!!!! */
- 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 ) {
- #ifndef final_version
- printk(" not found (invalid prefix).\n");
- #endif
- return ENODEV;
- }
-
- /* The correct probe method is to check the EISA ID. */
- for (i = 0; i < 4; i++)
- if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
- printk("EISA ID mismatch, %8x vs %8x.\n",
- inl(ioaddr + AC_EISA_ID), AC_EISA_ID);
- return ENODEV;
- }
-
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
-
- #ifndef final_version
- printk("\nAC3200 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
-
- /* Assign and snarf the interrupt now. */
- if (dev->irq == 0)
- dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
- else if (dev->irq == 2)
- dev->irq = 9;
-
- if (request_irq(dev->irq, ei_interrupt, 0, "ac3200")) {
- printk (" unable to get IRQ %d.\n", dev->irq);
- return 0;
- }
-
- 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));
- 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;
-
- ethdev_init(dev);
-
- 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;
-
- printk("\n%s: AC3200 at %#x, IRQ %d, %s port, shared memory %#lx-%#lx.\n",
- dev->name, ioaddr, dev->irq, port_name[dev->if_port],
- dev->mem_start, dev->mem_end-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;
-
- dev->open = &ac_open;
- dev->stop = &ac_close_card;
- NS8390_init(dev, 0);
- return 0;
- }
-
- static int ac_open(struct device *dev)
- {
- #ifdef notyet
- /* Someday we may enable the IRQ and shared memory here. */
- int ioaddr = dev->base_addr;
-
- if (request_irq(dev->irq, ei_interrupt, 0, "ac3200"))
- return -EAGAIN;
- #endif
-
- return ei_open(dev);
- }
-
- static void ac_reset_8390(struct 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 done\n");
-
- return;
- }
-
- /* Block input and output are easy on shared memory ethercards, the only
- complication is when the ring buffer wraps. */
-
- static int ac_block_input(struct device *dev, int count, char *buf,
- int ring_offset)
- {
- 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;
- memcpy(buf, (char*)xfer_start, semi_count);
- count -= semi_count;
- memcpy(buf + semi_count, (char *)dev->rmem_start, count);
- return dev->rmem_start + count;
- }
- memcpy(buf, (char*)xfer_start, count);
-
- return ring_offset + count;
- }
-
- static void ac_block_output(struct device *dev, int count,
- const unsigned char *buf, int start_page)
- {
- long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
-
- memcpy((unsigned char *)shmem, buf, count);
- }
-
- static int ac_close_card(struct device *dev)
- {
- dev->start = 0;
- dev->tbusy = 1;
-
- 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);
- irq2dev_map[dev->irq] = 0;
- #endif
-
- NS8390_init(dev, 0);
-
- return 0;
- }
-
-
- /*
- * 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:
- */
-