diff options
Diffstat (limited to 'drivers/net/ac3200.c')
| -rw-r--r-- | drivers/net/ac3200.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/drivers/net/ac3200.c b/drivers/net/ac3200.c new file mode 100644 index 000000000..27f9a8022 --- /dev/null +++ b/drivers/net/ac3200.c @@ -0,0 +1,275 @@ +/* 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/config.h> +#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: + */ |