lne390.c
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- /*
- lne390.c
- Linux driver for Mylex LNE390 EISA Network Adapter
- Copyright (C) 1996-1998, Paul Gortmaker.
- This software may be used and distributed according to the terms
- of the GNU General Public License, incorporated herein by reference.
- Information and Code Sources:
- 1) Based upon framework of es3210 driver.
- 2) The existing myriad of other Linux 8390 drivers by Donald Becker.
- 3) Russ Nelson's asm packet driver provided additional info.
- 4) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
- The LNE390 is an EISA shared memory NS8390 implementation. Note
- that all memory copies to/from the board must be 32bit transfers.
- There are two versions of the card: the lne390a and the lne390b.
- Going by the EISA cfg files, the "a" has jumpers to select between
- BNC/AUI, but the "b" also has RJ-45 and selection is via the SCU.
- The shared memory address selection is also slightly different.
- Note that shared memory address > 1MB are supported with this driver.
- You can try <http://www.mylex.com> if you want more info, as I've
- never even seen one of these cards. :)
- Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/09/01
- - get rid of check_region
- - no need to check if dev == NULL in lne390_probe1
- */
- static const char *version =
- "lne390.c: Driver revision v0.99.1, 01/09/2000n";
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <asm/io.h>
- #include <asm/system.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include "8390.h"
- int lne390_probe(struct net_device *dev);
- static int lne390_probe1(struct net_device *dev, int ioaddr);
- static int lne390_open(struct net_device *dev);
- static int lne390_close(struct net_device *dev);
- static void lne390_reset_8390(struct net_device *dev);
- static void lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
- static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
- static void lne390_block_output(struct net_device *dev, int count, const unsigned char *buf, const int start_page);
- #define LNE390_START_PG 0x00 /* First page of TX buffer */
- #define LNE390_STOP_PG 0x80 /* Last page +1 of RX ring */
- #define LNE390_ID_PORT 0xc80 /* Same for all EISA cards */
- #define LNE390_IO_EXTENT 0x20
- #define LNE390_SA_PROM 0x16 /* Start of e'net addr. */
- #define LNE390_RESET_PORT 0xc84 /* From the pkt driver source */
- #define LNE390_NIC_OFFSET 0x00 /* Hello, the 8390 is *here* */
- #define LNE390_ADDR0 0x00 /* 3 byte vendor prefix */
- #define LNE390_ADDR1 0x80
- #define LNE390_ADDR2 0xe5
- #define LNE390_ID0 0x10009835 /* 0x3598 = 01101 01100 11000 = mlx */
- #define LNE390_ID1 0x11009835 /* above is the 390A, this is 390B */
- #define LNE390_CFG1 0xc84 /* NB: 0xc84 is also "reset" port. */
- #define LNE390_CFG2 0xc90
- /*
- * You can OR any of the following bits together and assign it
- * to LNE390_DEBUG to get verbose driver info during operation.
- * Currently only the probe one is implemented.
- */
- #define LNE390_D_PROBE 0x01
- #define LNE390_D_RX_PKT 0x02
- #define LNE390_D_TX_PKT 0x04
- #define LNE390_D_IRQ 0x08
- #define LNE390_DEBUG 0
- static unsigned char irq_map[] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
- static unsigned int shmem_mapA[] __initdata = {0xff, 0xfe, 0xfd, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
- static unsigned int shmem_mapB[] __initdata = {0xff, 0xfe, 0x0e, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
- /*
- * Probe for the card. The best way is to read the EISA ID if it
- * is known. Then we can check the prefix of the station address
- * PROM for a match against the value assigned to Mylex.
- */
- int __init lne390_probe(struct net_device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
- int ret;
- SET_MODULE_OWNER(dev);
- if (ioaddr > 0x1ff) { /* Check a single specified location. */
- if (!request_region(ioaddr, LNE390_IO_EXTENT, dev->name))
- return -EBUSY;
- ret = lne390_probe1(dev, ioaddr);
- if (ret)
- release_region(ioaddr, LNE390_IO_EXTENT);
- return ret;
- }
- else if (ioaddr > 0) /* Don't probe at all. */
- return -ENXIO;
- if (!EISA_bus) {
- #if LNE390_DEBUG & LNE390_D_PROBE
- printk("lne390-debug: Not an EISA bus. Not probing high ports.n");
- #endif
- return -ENXIO;
- }
- /* EISA spec allows for up to 16 slots, but 8 is typical. */
- for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
- if (!request_region(ioaddr, LNE390_IO_EXTENT, dev->name))
- continue;
- if (lne390_probe1(dev, ioaddr) == 0)
- return 0;
- release_region(ioaddr, LNE390_IO_EXTENT);
- }
- return -ENODEV;
- }
- static int __init lne390_probe1(struct net_device *dev, int ioaddr)
- {
- int i, revision, ret;
- unsigned long eisa_id;
- if (inb_p(ioaddr + LNE390_ID_PORT) == 0xff) return -ENODEV;
- #if LNE390_DEBUG & LNE390_D_PROBE
- printk("lne390-debug: probe at %#x, ID %#8xn", ioaddr, inl(ioaddr + LNE390_ID_PORT));
- printk("lne390-debug: config regs: %#x %#xn",
- inb(ioaddr + LNE390_CFG1), inb(ioaddr + LNE390_CFG2));
- #endif
- /* Check the EISA ID of the card. */
- eisa_id = inl(ioaddr + LNE390_ID_PORT);
- if ((eisa_id != LNE390_ID0) && (eisa_id != LNE390_ID1)) {
- return -ENODEV;
- }
- revision = (eisa_id >> 24) & 0x01; /* 0 = rev A, 1 rev B */
-
- #if 0
- /* Check the Mylex vendor ID as well. Not really required. */
- if (inb(ioaddr + LNE390_SA_PROM + 0) != LNE390_ADDR0
- || inb(ioaddr + LNE390_SA_PROM + 1) != LNE390_ADDR1
- || inb(ioaddr + LNE390_SA_PROM + 2) != LNE390_ADDR2 ) {
- printk("lne390.c: card not found");
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- printk(" %02x", inb(ioaddr + LNE390_SA_PROM + i));
- printk(" (invalid prefix).n");
- return -ENODEV;
- }
- #endif
- /* Allocate dev->priv and fill in 8390 specific dev fields. */
- if (ethdev_init(dev)) {
- printk ("lne390.c: unable to allocate memory for dev->priv!n");
- return -ENOMEM;
- }
- printk("lne390.c: LNE390%X in EISA slot %d, address", 0xa+revision, ioaddr/0x1000);
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + LNE390_SA_PROM + i)));
- printk(".nlne390.c: ");
- /* Snarf the interrupt now. CFG file has them all listed as `edge' with share=NO */
- if (dev->irq == 0) {
- unsigned char irq_reg = inb(ioaddr + LNE390_CFG2) >> 3;
- dev->irq = irq_map[irq_reg & 0x07];
- printk("using");
- } else {
- /* This is useless unless we reprogram the card here too */
- if (dev->irq == 2) dev->irq = 9; /* Doh! */
- printk("assigning");
- }
- printk(" IRQ %d,", dev->irq);
- if ((ret = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))) {
- printk (" unable to get IRQ %d.n", dev->irq);
- kfree(dev->priv);
- dev->priv = NULL;
- return ret;
- }
- if (dev->mem_start == 0) {
- unsigned char mem_reg = inb(ioaddr + LNE390_CFG2) & 0x07;
- if (revision) /* LNE390B */
- dev->mem_start = shmem_mapB[mem_reg] * 0x10000;
- else /* LNE390A */
- dev->mem_start = shmem_mapA[mem_reg] * 0x10000;
- printk(" using ");
- } else {
- /* Should check for value in shmem_map and reprogram the card to use it */
- dev->mem_start &= 0xfff0000;
- printk(" assigning ");
- }
- printk("%dkB memory at physical address %#lxn",
- LNE390_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 "lne390.c: Card RAM overlaps with normal memory!!!n");
- printk(KERN_CRIT "lne390.c: Use EISA SCU to set card memory below 1MB,n");
- printk(KERN_CRIT "lne390.c: or to an address above 0x%lx.n", virt_to_bus(high_memory));
- printk(KERN_CRIT "lne390.c: Driver NOT installed.n");
- ret = -EINVAL;
- goto cleanup;
- }
- dev->mem_start = (unsigned long)ioremap(dev->mem_start, LNE390_STOP_PG*0x100);
- if (dev->mem_start == 0) {
- printk(KERN_ERR "lne390.c: Unable to remap card memory above 1MB !!n");
- printk(KERN_ERR "lne390.c: Try using EISA SCU to set memory below 1MB.n");
- printk(KERN_ERR "lne390.c: Driver NOT installed.n");
- ret = -EAGAIN;
- goto cleanup;
- }
- ei_status.reg0 = 1; /* Use as remap flag */
- printk("lne390.c: remapped %dkB card memory to virtual address %#lxn",
- LNE390_STOP_PG/4, dev->mem_start);
- }
- dev->mem_end = dev->rmem_end = dev->mem_start
- + (LNE390_STOP_PG - LNE390_START_PG)*256;
- dev->rmem_start = dev->mem_start + TX_PAGES*256;
- /* The 8390 offset is zero for the LNE390 */
- dev->base_addr = ioaddr;
- ei_status.name = "LNE390";
- ei_status.tx_start_page = LNE390_START_PG;
- ei_status.rx_start_page = LNE390_START_PG + TX_PAGES;
- ei_status.stop_page = LNE390_STOP_PG;
- ei_status.word16 = 1;
- if (ei_debug > 0)
- printk(version);
- ei_status.reset_8390 = &lne390_reset_8390;
- ei_status.block_input = &lne390_block_input;
- ei_status.block_output = &lne390_block_output;
- ei_status.get_8390_hdr = &lne390_get_8390_hdr;
- dev->open = &lne390_open;
- dev->stop = &lne390_close;
- NS8390_init(dev, 0);
- return 0;
- cleanup:
- free_irq(dev->irq, dev);
- kfree(dev->priv);
- dev->priv = NULL;
- return ret;
- }
- /*
- * Reset as per the packet driver method. Judging by the EISA cfg
- * file, this just toggles the "Board Enable" bits (bit 2 and 0).
- */
- static void lne390_reset_8390(struct net_device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
- outb(0x04, ioaddr + LNE390_RESET_PORT);
- if (ei_debug > 1) printk("%s: resetting the LNE390...", dev->name);
- mdelay(2);
- ei_status.txing = 0;
- outb(0x01, ioaddr + LNE390_RESET_PORT);
- if (ei_debug > 1) printk("reset donen");
- return;
- }
- /*
- * Note: In the following three functions is the implicit assumption
- * that the associated memcpy will only use "rep; movsl" as long as
- * we keep the counts as some multiple of doublewords. This is a
- * requirement of the hardware, and also prevents us from using
- * eth_io_copy_and_sum() since we can't guarantee it will limit
- * itself to doubleword access.
- */
- /*
- * 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. (A single doubleword.)
- */
- static void
- lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
- {
- unsigned long hdr_start = dev->mem_start + ((ring_page - LNE390_START_PG)<<8);
- isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
- hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */
- }
- /*
- * Block input and output are easy on shared memory ethercards, the only
- * complication is when the ring buffer wraps. The count will already
- * be rounded up to a doubleword value via lne390_get_8390_hdr() above.
- */
- static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb,
- int ring_offset)
- {
- unsigned long xfer_start = dev->mem_start + ring_offset - (LNE390_START_PG<<8);
- if (xfer_start + count > dev->rmem_end) {
- /* Packet wraps over end of ring buffer. */
- 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. */
- isa_memcpy_fromio(skb->data, xfer_start, count);
- }
- }
- static void lne390_block_output(struct net_device *dev, int count,
- const unsigned char *buf, int start_page)
- {
- unsigned long shmem = dev->mem_start + ((start_page - LNE390_START_PG)<<8);
- count = (count + 3) & ~3; /* Round up to doubleword */
- isa_memcpy_toio(shmem, buf, count);
- }
- static int lne390_open(struct net_device *dev)
- {
- ei_open(dev);
- return 0;
- }
- static int lne390_close(struct net_device *dev)
- {
- if (ei_debug > 1)
- printk("%s: Shutting down ethercard.n", dev->name);
- ei_close(dev);
- return 0;
- }
- #ifdef MODULE
- #define MAX_LNE_CARDS 4 /* Max number of LNE390 cards per module */
- static struct net_device dev_lne[MAX_LNE_CARDS];
- static int io[MAX_LNE_CARDS];
- static int irq[MAX_LNE_CARDS];
- static int mem[MAX_LNE_CARDS];
- MODULE_PARM(io, "1-" __MODULE_STRING(MAX_LNE_CARDS) "i");
- MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_LNE_CARDS) "i");
- MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_LNE_CARDS) "i");
- 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("Mylex LNE390A/B EISA Ethernet driver");
- MODULE_LICENSE("GPL");
- int init_module(void)
- {
- int this_dev, found = 0;
- for (this_dev = 0; this_dev < MAX_LNE_CARDS; this_dev++) {
- struct net_device *dev = &dev_lne[this_dev];
- dev->irq = irq[this_dev];
- dev->base_addr = io[this_dev];
- dev->mem_start = mem[this_dev];
- dev->init = lne390_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 "lne390.c: No LNE390 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_LNE_CARDS; this_dev++) {
- struct net_device *dev = &dev_lne[this_dev];
- if (dev->priv != NULL) {
- void *priv = dev->priv;
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, LNE390_IO_EXTENT);
- if (ei_status.reg0)
- iounmap((void *)dev->mem_start);
- unregister_netdev(dev);
- kfree(priv);
- }
- }
- }
- #endif /* MODULE */