es3210.c
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上传日期:2013-02-24
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- /*
- es3210.c
- Linux driver for Racal-Interlan ES3210 EISA Network Adapter
- Copyright (C) 1996, 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) The existing myriad of Linux 8390 drivers written by Donald Becker.
- 2) Once again Russ Nelson's asm packet driver provided additional info.
- 3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
- Too bad it doesn't work -- see below.
- The ES3210 is an EISA shared memory NS8390 implementation. Note
- that all memory copies to/from the board must be 32bit transfers.
- Which rules out using eth_io_copy_and_sum() in this driver.
- Apparently there are two slightly different revisions of the
- card, since there are two distinct EISA cfg files (!rii0101.cfg
- and !rii0102.cfg) One has media select in the cfg file and the
- other doesn't. Hopefully this will work with either.
- That is about all I can tell you about it, having never actually
- even seen one of these cards. :) Try http://www.interlan.com
- if you want more info.
- Thanks go to Mark Salazar for testing v0.02 of this driver.
- Bugs, to-fix, etc:
- 1) The EISA cfg ports that are *supposed* to have the IRQ and shared
- mem values just read 0xff all the time. Hrrmpf. Apparently the
- same happens with the packet driver as the code for reading
- these registers is disabled there. In the meantime, boot with:
- ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and
- shared memory detection. (The i/o port detection is okay.)
- 2) Module support currently untested. Probably works though.
- */
- static const char version[] =
- "es3210.c: Driver revision v0.03, 14/09/96n";
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/string.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 es_probe(struct net_device *dev);
- static int es_probe1(struct net_device *dev, int ioaddr);
- static int es_open(struct net_device *dev);
- static int es_close(struct net_device *dev);
- static void es_reset_8390(struct net_device *dev);
- static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
- static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
- static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page);
- #define ES_START_PG 0x00 /* First page of TX buffer */
- #define ES_STOP_PG 0x40 /* Last page +1 of RX ring */
- #define ES_IO_EXTENT 0x37 /* The cfg file says 0xc90 -> 0xcc7 */
- #define ES_ID_PORT 0xc80 /* Same for all EISA cards */
- #define ES_SA_PROM 0xc90 /* Start of e'net addr. */
- #define ES_RESET_PORT 0xc84 /* From the packet driver source */
- #define ES_NIC_OFFSET 0xca0 /* Hello, the 8390 is *here* */
- #define ES_ADDR0 0x02 /* 3 byte vendor prefix */
- #define ES_ADDR1 0x07
- #define ES_ADDR2 0x01
- /*
- * Two card revisions. EISA ID's are always rev. minor, rev. major,, and
- * then the three vendor letters stored in 5 bits each, with an "a" = 1.
- * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
- * config utility determines automagically what config file(s) to use.
- */
- #define ES_EISA_ID1 0x01012949 /* !rii0101.cfg */
- #define ES_EISA_ID2 0x02012949 /* !rii0102.cfg */
- #define ES_CFG1 0xcc0 /* IOPORT(1) --> IOPORT(6) in cfg file */
- #define ES_CFG2 0xcc1
- #define ES_CFG3 0xcc2
- #define ES_CFG4 0xcc3
- #define ES_CFG5 0xcc4
- #define ES_CFG6 0xc84 /* NB: 0xc84 is also "reset" port. */
- /*
- * You can OR any of the following bits together and assign it
- * to ES_DEBUG to get verbose driver info during operation.
- * Some of these don't do anything yet.
- */
- #define ES_D_PROBE 0x01
- #define ES_D_RX_PKT 0x02
- #define ES_D_TX_PKT 0x04
- #define ED_D_IRQ 0x08
- #define ES_DEBUG 0
- static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10};
- static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15};
- /*
- * Probe for the card. The best way is to read the EISA ID if it
- * is known. Then we check the prefix of the station address
- * PROM for a match against the Racal-Interlan assigned value.
- */
- int __init es_probe(struct net_device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
- SET_MODULE_OWNER(dev);
- if (ioaddr > 0x1ff) /* Check a single specified location. */
- return es_probe1(dev, ioaddr);
- else if (ioaddr > 0) /* Don't probe at all. */
- return -ENXIO;
- if (!EISA_bus) {
- #if ES_DEBUG & ES_D_PROBE
- printk("es3210.c: Not 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 (es_probe1(dev, ioaddr) == 0)
- return 0;
- return -ENODEV;
- }
- static int __init es_probe1(struct net_device *dev, int ioaddr)
- {
- int i, retval;
- unsigned long eisa_id;
- if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210"))
- return -ENODEV;
- #if ES_DEBUG & ES_D_PROBE
- printk("es3210.c: probe at %#x, ID %#8xn", ioaddr, inl(ioaddr + ES_ID_PORT));
- printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#xn",
- inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
- inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
- #endif
- /* Check the EISA ID of the card. */
- eisa_id = inl(ioaddr + ES_ID_PORT);
- if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
- retval = -ENODEV;
- goto out;
- }
- /* Check the Racal vendor ID as well. */
- if (inb(ioaddr + ES_SA_PROM + 0) != ES_ADDR0
- || inb(ioaddr + ES_SA_PROM + 1) != ES_ADDR1
- || inb(ioaddr + ES_SA_PROM + 2) != ES_ADDR2 ) {
- printk("es3210.c: card not found");
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- printk(" %02x", inb(ioaddr + ES_SA_PROM + i));
- printk(" (invalid prefix).n");
- retval = -ENODEV;
- goto out;
- }
- printk("es3210.c: ES3210 rev. %ld at %#x, node", eisa_id>>24, ioaddr);
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i)));
- /* Snarf the interrupt now. */
- if (dev->irq == 0) {
- unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
- unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
- if (hi_irq != 0) {
- dev->irq = hi_irq_map[hi_irq - 1];
- } else {
- int i = 0;
- while (lo_irq > (1<<i)) i++;
- dev->irq = lo_irq_map[i];
- }
- printk(" using IRQ %d", dev->irq);
- #if ES_DEBUG & ES_D_PROBE
- printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %dn",
- hi_irq, lo_irq, dev->irq);
- #endif
- } else {
- if (dev->irq == 2)
- dev->irq = 9; /* Doh! */
- printk(" assigning IRQ %d", dev->irq);
- }
- if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) {
- printk (" unable to get IRQ %d.n", dev->irq);
- retval = -EAGAIN;
- goto out;
- }
- if (dev->mem_start == 0) {
- unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
- unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
- if (mem_enabled != 0x80) {
- printk(" shared mem disabled - giving upn");
- retval = -ENXIO;
- goto out1;
- }
- dev->mem_start = 0xC0000 + mem_bits*0x4000;
- printk(" using ");
- } else {
- printk(" assigning ");
- }
- dev->mem_end = dev->rmem_end = dev->mem_start
- + (ES_STOP_PG - ES_START_PG)*256;
- dev->rmem_start = dev->mem_start + TX_PAGES*256;
- printk("mem %#lx-%#lxn", dev->mem_start, dev->mem_end-1);
- /* 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 out1;
- }
- #if ES_DEBUG & ES_D_PROBE
- if (inb(ioaddr + ES_CFG5))
- printk("es3210: Warning - DMA channel enabled, but not used here.n");
- #endif
- /* Note, point at the 8390, and not the card... */
- dev->base_addr = ioaddr + ES_NIC_OFFSET;
- ei_status.name = "ES3210";
- ei_status.tx_start_page = ES_START_PG;
- ei_status.rx_start_page = ES_START_PG + TX_PAGES;
- ei_status.stop_page = ES_STOP_PG;
- ei_status.word16 = 1;
- if (ei_debug > 0)
- printk(version);
- ei_status.reset_8390 = &es_reset_8390;
- ei_status.block_input = &es_block_input;
- ei_status.block_output = &es_block_output;
- ei_status.get_8390_hdr = &es_get_8390_hdr;
- dev->open = &es_open;
- dev->stop = &es_close;
- NS8390_init(dev, 0);
- return 0;
- out1:
- free_irq(dev->irq, dev);
- out:
- release_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT);
- return retval;
- }
- /*
- * 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 es_reset_8390(struct net_device *dev)
- {
- unsigned short ioaddr = dev->base_addr;
- unsigned long end;
- outb(0x04, ioaddr + ES_RESET_PORT);
- if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
- end = jiffies + 2*HZ/100;
- while ((signed)(end - jiffies) > 0) continue;
- ei_status.txing = 0;
- outb(0x01, ioaddr + ES_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
- es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
- {
- unsigned long hdr_start = dev->mem_start + ((ring_page - ES_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 es_get_8390_hdr() above.
- */
- static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb,
- int ring_offset)
- {
- unsigned long xfer_start = dev->mem_start + ring_offset - (ES_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_eth_io_copy_and_sum(skb, xfer_start, count, 0);
- }
- }
- static void es_block_output(struct net_device *dev, int count,
- const unsigned char *buf, int start_page)
- {
- unsigned long shmem = dev->mem_start + ((start_page - ES_START_PG)<<8);
- count = (count + 3) & ~3; /* Round up to doubleword */
- isa_memcpy_toio(shmem, buf, count);
- }
- static int es_open(struct net_device *dev)
- {
- ei_open(dev);
- return 0;
- }
- static int es_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_ES_CARDS 4 /* Max number of ES3210 cards per module */
- #define NAMELEN 8 /* # of chars for storing dev->name */
- static struct net_device dev_es3210[MAX_ES_CARDS];
- static int io[MAX_ES_CARDS];
- static int irq[MAX_ES_CARDS];
- static int mem[MAX_ES_CARDS];
- MODULE_PARM(io, "1-" __MODULE_STRING(MAX_ES_CARDS) "i");
- MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_ES_CARDS) "i");
- MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_ES_CARDS) "i");
- MODULE_PARM_DESC(io, "ES3210 I/O base address(es)");
- MODULE_PARM_DESC(irq, "ES3210 IRQ number(s)");
- MODULE_PARM_DESC(mem, "ES3210 memory base address(es)");
- int
- init_module(void)
- {
- int this_dev, found = 0;
- for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
- struct net_device *dev = &dev_es3210[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 = es_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 "es3210.c: No es3210 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_ES_CARDS; this_dev++) {
- struct net_device *dev = &dev_es3210[this_dev];
- if (dev->priv != NULL) {
- void *priv = dev->priv;
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, ES_IO_EXTENT);
- unregister_netdev(dev);
- kfree(priv);
- }
- }
- }
- #endif /* MODULE */
- MODULE_LICENSE("GPL");