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- /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
- /*
- Written 1992,1993 by Donald Becker.
-
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency. This software may be used and
- distributed according to the terms of the GNU Public License,
- incorporated herein by reference.
-
- This driver should work with many 8390-based ethernet boards. Currently
- it support the NE1000, NE2000, clones, and some Cabletron products.
-
- The Author may be reached as becker@super.org or
- C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
- */
-
- /* Routines for the NatSemi-based designs (NE[12]000). */
-
- static char *version =
- "ne.c:v0.99-15k 3/3/94 Donald Becker (becker@super.org)\n";
-
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <asm/system.h>
- #include <asm/io.h>
-
- #include "dev.h"
- #include "8390.h"
-
- #define NE_BASE (dev->base_addr)
- #define NE_CMD 0x00
- #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
- #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
-
- #define NE1SM_START_PG 0x20 /* First page of TX buffer */
- #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
- #define NESM_START_PG 0x40 /* First page of TX buffer */
- #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
-
- int ne_probe(struct device *dev);
- static int neprobe1(int ioaddr, struct device *dev, int verbose);
-
- static void ne_reset_8390(struct device *dev);
- static int ne_block_input(struct device *dev, int count,
- char *buf, int ring_offset);
- static void ne_block_output(struct device *dev, const int count,
- const unsigned char *buf, const int start_page);
-
-
- /* Probe for various non-shared-memory ethercards.
-
- NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
- buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
- the SAPROM, while other supposed NE2000 clones must be detected by their
- SA prefix.
-
- Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
- mode results in doubled values, which can be detected and compansated for.
-
- The probe is also responsible for initializing the card and filling
- in the 'dev' and 'ei_status' structures.
-
- We use the minimum memory size for some ethercard product lines, iff we can't
- distinguish models. You can increase the packet buffer size by setting
- PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
- E1010 starts at 0x100 and ends at 0x2000.
- E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
- E2010 starts at 0x100 and ends at 0x4000.
- E2010-x starts at 0x100 and ends at 0xffff. */
-
- int ne_probe(struct device *dev)
- {
- int *port, ports[] = {0x300, 0x280, 0x320, 0x340, 0x360, 0};
- short ioaddr = dev->base_addr;
-
- if (ioaddr < 0)
- return ENXIO; /* Don't probe at all. */
- if (ioaddr > 0x100)
- return ! neprobe1(ioaddr, dev, 1);
-
- for (port = &ports[0]; *port; port++) {
- #ifdef HAVE_PORTRESERVE
- if (check_region(*port, 32))
- continue;
- #endif
- if (inb_p(*port) != 0xff && neprobe1(*port, dev, 0)) {
- dev->base_addr = *port;
- return 0;
- }
- }
- dev->base_addr = ioaddr;
- return ENODEV;
- }
-
- static int neprobe1(int ioaddr, struct device *dev, int verbose)
- {
- int i;
- unsigned char SA_prom[32];
- int wordlength = 2;
- char *name;
- int start_page, stop_page;
- int neX000, ctron, dlink, dfi;
- int reg0 = inb(ioaddr);
-
- if ( reg0 == 0xFF)
- return 0;
-
- /* Do a quick preliminary check that we have a 8390. */
- { int regd;
- outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
- regd = inb_p(ioaddr + 0x0d);
- outb_p(0xff, ioaddr + 0x0d);
- outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
- inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
- if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
- outb_p(reg0, ioaddr);
- outb(regd, ioaddr + 0x0d); /* Restore the old values. */
- return 0;
- }
- }
-
- printk("NE*000 ethercard probe at %#3x:", ioaddr);
-
- /* Read the 16 bytes of station address prom, returning 1 for
- an eight-bit interface and 2 for a 16-bit interface.
- We must first initialize registers, similar to NS8390_init(eifdev, 0).
- We can't reliably read the SAPROM address without this.
- (I learned the hard way!). */
- {
- struct {unsigned char value, offset; } program_seq[] = {
- {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
- {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
- {0x00, EN0_RCNTLO}, /* Clear the count regs. */
- {0x00, EN0_RCNTHI},
- {0x00, EN0_IMR}, /* Mask completion irq. */
- {0xFF, EN0_ISR},
- {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
- {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
- {32, EN0_RCNTLO},
- {0x00, EN0_RCNTHI},
- {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
- {0x00, EN0_RSARHI},
- {E8390_RREAD+E8390_START, E8390_CMD},
- };
- for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
- outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
- }
- for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
- SA_prom[i] = inb(ioaddr + NE_DATAPORT);
- SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
- if (SA_prom[i] != SA_prom[i+1])
- wordlength = 1;
- }
-
- if (wordlength == 2) {
- /* We must set the 8390 for word mode. */
- outb_p(0x49, ioaddr + EN0_DCFG);
- /* We used to reset the ethercard here, but it doesn't seem
- to be necessary. */
- /* Un-double the SA_prom values. */
- for (i = 0; i < 16; i++)
- SA_prom[i] = SA_prom[i+i];
- }
-
- #if defined(show_all_SAPROM)
- /* If your ethercard isn't detected define this to see the SA_PROM. */
- for(i = 0; i < sizeof(SA_prom); i++)
- printk(" %2.2x", SA_prom[i]);
- #else
- for(i = 0; i < ETHER_ADDR_LEN; i++) {
- dev->dev_addr[i] = SA_prom[i];
- printk(" %2.2x", SA_prom[i]);
- }
- #endif
-
- neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
- ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
- dlink = (SA_prom[0] == 0x00 && SA_prom[1] == 0xDE && SA_prom[2] == 0x01);
- dfi = (SA_prom[0] == 'D' && SA_prom[1] == 'F' && SA_prom[2] == 'I');
-
- /* Set up the rest of the parameters. */
- if (neX000 || dlink || dfi) {
- if (wordlength == 2) {
- name = dlink ? "DE200" : "NE2000";
- start_page = NESM_START_PG;
- stop_page = NESM_STOP_PG;
- } else {
- name = dlink ? "DE100" : "NE1000";
- start_page = NE1SM_START_PG;
- stop_page = NE1SM_STOP_PG;
- }
- } else if (ctron) {
- name = "Cabletron";
- start_page = 0x01;
- stop_page = (wordlength == 2) ? 0x40 : 0x20;
- } else {
- printk(" not found.\n");
- return 0;
- }
-
- if (dev->irq < 2) {
- autoirq_setup(0);
- outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
- outb_p(0x00, ioaddr + EN0_RCNTLO);
- outb_p(0x00, ioaddr + EN0_RCNTHI);
- outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
- outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
- dev->irq = autoirq_report(0);
- if (ei_debug > 2)
- printk(" autoirq is %d", dev->irq);
- } else if (dev->irq == 2)
- /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
- or don't know which one to set. */
- dev->irq = 9;
-
- /* Snarf the interrupt now. There's no point in waiting since we cannot
- share and the board will usually be enabled. */
- {
- int irqval = irqaction (dev->irq, &ei_sigaction);
- if (irqval) {
- printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval);
- return 0;
- }
- }
-
- dev->base_addr = ioaddr;
-
- #ifdef HAVE_PORTRESERVE
- snarf_region(ioaddr, 32);
- #endif
-
- ethdev_init(dev);
- printk("\n%s: %s found at %#x, using IRQ %d.\n",
- dev->name, name, ioaddr, dev->irq);
-
- if (ei_debug > 0)
- printk(version);
-
- ei_status.name = name;
- ei_status.tx_start_page = start_page;
- ei_status.stop_page = stop_page;
- ei_status.word16 = (wordlength == 2);
-
- ei_status.rx_start_page = start_page + TX_PAGES;
- #ifdef PACKETBUF_MEMSIZE
- /* Allow the packet buffer size to be overridden by know-it-alls. */
- ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
- #endif
-
- ei_status.reset_8390 = &ne_reset_8390;
- ei_status.block_input = &ne_block_input;
- ei_status.block_output = &ne_block_output;
- NS8390_init(dev, 0);
- return dev->base_addr;
- }
-
- /* Hard reset the card. This used to pause for the same period that a
- 8390 reset command required, but that shouldn't be necessary. */
- static void
- ne_reset_8390(struct device *dev)
- {
- int tmp = inb_p(NE_BASE + NE_RESET);
- int reset_start_time = jiffies;
-
- if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
- ei_status.txing = 0;
-
- outb_p(tmp, NE_BASE + NE_RESET);
- /* This check _should_not_ be necessary, omit eventually. */
- while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
- if (jiffies - reset_start_time > 2) {
- printk("%s: ne_reset_8390() did not complete.\n", dev->name);
- break;
- }
- }
-
- /* Block input and output, similar to the Crynwr packet driver. If you
- porting to a new ethercard look at the packet driver source for hints.
- The NEx000 doesn't share it on-board packet memory -- you have to put
- the packet out through the "remote DMA" dataport using outb. */
-
- static int
- ne_block_input(struct device *dev, int count, char *buf, int ring_offset)
- {
- int xfer_count = count;
- int nic_base = dev->base_addr;
-
- if (ei_status.dmaing) {
- if (ei_debug > 0)
- printk("%s: DMAing conflict in ne_block_input."
- "[DMAstat:%1x][irqlock:%1x]\n",
- dev->name, ei_status.dmaing, ei_status.irqlock);
- return 0;
- }
- ei_status.dmaing |= 0x01;
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
- outb_p(count & 0xff, nic_base + EN0_RCNTLO);
- outb_p(count >> 8, nic_base + EN0_RCNTHI);
- outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
- outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
- outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
- if (ei_status.word16) {
- insw(NE_BASE + NE_DATAPORT,buf,count>>1);
- if (count & 0x01)
- buf[count-1] = inb(NE_BASE + NE_DATAPORT), xfer_count++;
- } else {
- insb(NE_BASE + NE_DATAPORT, buf, count);
- }
-
- /* This was for the ALPHA version only, but enough people have
- encountering problems that it is still here. If you see
- this message you either 1) have an slightly imcompatible clone
- or 2) have noise/speed problems with your bus. */
- if (ei_debug > 1) { /* DMA termination address check... */
- int addr, tries = 20;
- do {
- /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
- -- it's broken! Check the "DMA" address instead. */
- int high = inb_p(nic_base + EN0_RSARHI);
- int low = inb_p(nic_base + EN0_RSARLO);
- addr = (high << 8) + low;
- if (((ring_offset + xfer_count) & 0xff) == low)
- break;
- } while (--tries > 0);
- if (tries <= 0)
- printk("%s: RX transfer address mismatch,"
- "%#4.4x (expected) vs. %#4.4x (actual).\n",
- dev->name, ring_offset + xfer_count, addr);
- }
- ei_status.dmaing &= ~0x01;
- return ring_offset + count;
- }
-
- static void
- ne_block_output(struct device *dev, int count,
- const unsigned char *buf, const int start_page)
- {
- int retries = 0;
- int nic_base = NE_BASE;
-
- /* Round the count up for word writes. Do we need to do this?
- What effect will an odd byte count have on the 8390?
- I should check someday. */
- if (ei_status.word16 && (count & 0x01))
- count++;
- if (ei_status.dmaing) {
- if (ei_debug > 0)
- printk("%s: DMAing conflict in ne_block_output."
- "[DMAstat:%1x][irqlock:%1x]\n",
- dev->name, ei_status.dmaing, ei_status.irqlock);
- return;
- }
- ei_status.dmaing |= 0x02;
- /* We should already be in page 0, but to be safe... */
- outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
-
- retry:
- #if defined(rw_bugfix)
- /* Handle the read-before-write bug the same way as the
- Crynwr packet driver -- the NatSemi method doesn't work.
- Actually this doesn't aways work either, but if you have
- problems with your NEx000 this is better than nothing! */
- outb_p(0x42, nic_base + EN0_RCNTLO);
- outb_p(0x00, nic_base + EN0_RCNTHI);
- outb_p(0x42, nic_base + EN0_RSARLO);
- outb_p(0x00, nic_base + EN0_RSARHI);
- outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
- /* Make certain that the dummy read has occured. */
- SLOW_DOWN_IO;
- SLOW_DOWN_IO;
- SLOW_DOWN_IO;
- #endif /* rw_bugfix */
-
- /* Now the normal output. */
- outb_p(count & 0xff, nic_base + EN0_RCNTLO);
- outb_p(count >> 8, nic_base + EN0_RCNTHI);
- outb_p(0x00, nic_base + EN0_RSARLO);
- outb_p(start_page, nic_base + EN0_RSARHI);
-
- outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
- if (ei_status.word16) {
- outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
- } else {
- outsb(NE_BASE + NE_DATAPORT, buf, count);
- }
-
- /* This was for the ALPHA version only, but enough people have
- encountering problems that it is still here. */
- if (ei_debug > 1) { /* DMA termination address check... */
- int addr, tries = 20;
- do {
- /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
- -- it's broken! Check the "DMA" address instead. */
- int high = inb_p(nic_base + EN0_RSARHI);
- int low = inb_p(nic_base + EN0_RSARLO);
- addr = (high << 8) + low;
- if ((start_page << 8) + count == addr)
- break;
- } while (--tries > 0);
- if (tries <= 0) {
- printk("%s: Tx packet transfer address mismatch,"
- "%#4.4x (expected) vs. %#4.4x (actual).\n",
- dev->name, (start_page << 8) + count, addr);
- if (retries++ == 0)
- goto retry;
- }
- }
- ei_status.dmaing &= ~0x02;
- return;
- }
-
-
- /*
- * Local variables:
- * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c"
- * version-control: t
- * kept-new-versions: 5
- * End:
- */
-