diff options
Diffstat (limited to 'drivers/net/ac3200.c')
| -rw-r--r-- | drivers/net/ac3200.c | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/drivers/net/ac3200.c b/drivers/net/ac3200.c new file mode 100644 index 000000000000..24fba36b5c1d --- /dev/null +++ b/drivers/net/ac3200.c @@ -0,0 +1,424 @@ +/* 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/eisa.h> +#include <linux/kernel.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" + +#define DRV_NAME "ac3200" + +/* 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 */ + +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. + */ + +static int __init do_ac3200_probe(struct net_device *dev) +{ + unsigned short ioaddr = dev->base_addr; + int irq = dev->irq; + int mem_start = dev->mem_start; + + 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; + dev->irq = irq; + dev->mem_start = mem_start; + } + + return -ENODEV; +} + +static void cleanup_card(struct net_device *dev) +{ + /* Someday free_irq may be in ac_close_card() */ + free_irq(dev->irq, dev); + release_region(dev->base_addr, AC_IO_EXTENT); + iounmap(ei_status.mem); +} + +#ifndef MODULE +struct net_device * __init ac3200_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_ac3200_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 ac_probe1(int ioaddr, struct net_device *dev) +{ + int i, retval; + + if (!request_region(ioaddr, AC_IO_EXTENT, DRV_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 + + /* Assign and allocate the interrupt now. */ + if (dev->irq == 0) { + dev->irq = config2irq(inb(ioaddr + AC_CONFIG)); + printk(", using"); + } else { + dev->irq = irq_canonicalize(dev->irq); + printk(", assigning"); + } + + retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev); + if (retval) { + printk (" nothing! Unable to get IRQ %d.\n", dev->irq); + goto out1; + } + + printk(" IRQ %d, %s port\n", 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 !!! + * + * ioremap() will fail in that case. + */ + ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100); + if (!ei_status.mem) { + 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 out1; + } + printk("ac3200.c: remapped %dkB card memory to virtual address %p\n", + AC_STOP_PG/4, ei_status.mem); + + dev->mem_start = (unsigned long)ei_status.mem; + dev->mem_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; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ei_poll; +#endif + NS8390_init(dev, 0); + return 0; +out1: + free_irq(dev->irq, dev); +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 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 +ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8); + 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) +{ + void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256; + + if (ring_offset + count > AC_STOP_PG*256) { + /* We must wrap the input move. */ + int semi_count = AC_STOP_PG*256 - ring_offset; + memcpy_fromio(skb->data, 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, start, count, 0); + } +} + +static void ac_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page) +{ + void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8); + + 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_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(mem, int, NULL, 0); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s)"); +MODULE_PARM_DESC(mem, "Memory base address(es)"); +MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver"); +MODULE_LICENSE("GPL"); + +int +init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) { + if (io[this_dev] == 0 && this_dev != 0) + break; + dev = alloc_ei_netdev(); + if (!dev) + break; + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + dev->mem_start = mem[this_dev]; /* Currently ignored by driver */ + if (do_ac3200_probe(dev) == 0) { + if (register_netdev(dev) == 0) { + dev_ac32[found++] = dev; + continue; + } + cleanup_card(dev); + } + free_netdev(dev); + printk(KERN_WARNING "ac3200.c: No ac3200 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_AC32_CARDS; this_dev++) { + struct net_device *dev = dev_ac32[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |