/* Routines for the NatSemi-based designs (NE[12]000). */
staticconstchar version1[] = "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n"; staticconstchar version2[] = "Last modified Nov 1, 2000 by Paul Gortmaker\n";
/* Some defines that people can play with if so inclined. */
/* Do we support clones that don't adhere to 14,15 of the SAprom ? */ #define SUPPORT_NE_BAD_CLONES /* 0xbad = bad sig or no reset ack */ #define BAD 0xbad
#define MAX_NE_CARDS 4/* Max number of NE cards per module */ staticstruct platform_device *pdev_ne[MAX_NE_CARDS]; staticint io[MAX_NE_CARDS]; staticint irq[MAX_NE_CARDS]; staticint bad[MAX_NE_CARDS]; static u32 ne_msg_enable;
#ifdef MODULE
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_array(bad, int, NULL, 0);
module_param_named(msg_enable, ne_msg_enable, uint, 0444);
MODULE_PARM_DESC(io, "I/O base address(es),required");
MODULE_PARM_DESC(irq, "IRQ number(s)");
MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
MODULE_LICENSE("GPL"); #endif/* MODULE */
/* Do we perform extra sanity checks on stuff ? */ /* #define NE_SANITY_CHECK */
/* Do we implement the read before write bugfix ? */ /* #define NE_RW_BUGFIX */
/* Do we have a non std. amount of memory? (in units of 256 byte pages) */ /* #define PACKETBUF_MEMSIZE 0x40 */
/* This is set up so that no ISA autoprobe takes place. We can't guarantee thatthene2kprobeisthelast8390basedprobetotakeplace(asit isatboot)andsotheprobewillgetconfusedbyanyother8390cards.
ISA device autoprobes on a running machine are not recommended anyway. */ #if !defined(MODULE) && defined(CONFIG_ISA) /* Do we need a portlist for the ISA auto-probe ? */ #define NEEDS_PORTLIST #endif
/* A zero-terminated list of I/O addresses to be probed at boot. */ #ifdef NEEDS_PORTLIST staticunsignedint netcard_portlist[] __initdata = { 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
}; #endif
#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 NE_IO_EXTENT 0x20
#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 */
Weusetheminimummemorysizeforsomeethercardproductlines,iffwecan't distinguishmodels.Youcanincreasethepacketbuffersizebysetting PACKETBUF_MEMSIZE.ReportedCabletronpacketbufferlocationsare: E1010startsat0x100andendsat0x2000. E1010-xstartsat0x100andendsat0x8000.("-x"means"morememory") E2010startsat0x100andendsat0x4000.
E2010-x starts at 0x100 and ends at 0xffff. */
/* First check any supplied i/o locations. User knows best. <cough> */ if (base_addr > 0x1ff) { /* Check a single specified location. */ int ret = ne_probe1(dev, base_addr); if (ret)
netdev_warn(dev, "ne.c: No NE*000 card found at " "i/o = %#lx\n", base_addr); return ret;
} elseif (base_addr != 0) /* Don't probe at all. */ return -ENXIO;
/* Then look for any installed ISAPnP clones */ if (isapnp_present() && (ne_probe_isapnp(dev) == 0)) return0;
#ifdef NEEDS_PORTLIST /* Last resort. The semi-risky ISA auto-probe. */ for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) { int ioaddr = netcard_portlist[base_addr];
dev->irq = orig_irq; if (ne_probe1(dev, ioaddr) == 0) return0;
} #endif
return -ENODEV;
}
staticint __init ne_probe_isapnp(struct net_device *dev)
{ int i;
for (i = 0; isapnp_clone_list[i].vendor != 0; i++) { struct pnp_dev *idev = NULL;
while ((idev = pnp_find_dev(NULL,
isapnp_clone_list[i].vendor,
isapnp_clone_list[i].function,
idev))) { /* Avoid already found cards from previous calls */ if (pnp_device_attach(idev) < 0) continue; if (pnp_activate_dev(idev) < 0) {
pnp_device_detach(idev); continue;
} /* if no io and irq, search for next */ if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
pnp_device_detach(idev); continue;
} /* found it */
dev->base_addr = pnp_port_start(idev, 0);
dev->irq = pnp_irq(idev, 0);
netdev_info(dev, "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
(char *) isapnp_clone_list[i].driver_data,
dev->base_addr, dev->irq); if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
netdev_err(dev, "ne.c: Probe of ISAPnP card at %#lx failed.\n",
dev->base_addr);
pnp_device_detach(idev); return -ENXIO;
}
ei_status.priv = (unsignedlong)idev; break;
} if (!idev) continue; return0;
}
return -ENODEV;
}
staticint __init ne_probe1(struct net_device *dev, unsignedlong ioaddr)
{ int i; unsignedchar SA_prom[32]; int wordlength = 2; constchar *name = NULL; int start_page, stop_page; int neX000, ctron, copam, bad_card; int reg0, ret; staticunsigned version_printed; struct ei_device *ei_local = netdev_priv(dev);
if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME)) return -EBUSY;
reg0 = inb_p(ioaddr); if (reg0 == 0xFF) {
ret = -ENODEV; goto err_out;
}
/* Do a preliminary verification 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_p(regd, ioaddr + 0x0d); /* Restore the old values. */
ret = -ENODEV; goto err_out;
}
}
netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
/* A user with a poor card that fails to ack the reset, or that doesnothaveavalid0x57,0x57signaturecanstillusethis withouthavingtorecompile.Specifyingani/oaddressalong withanotherwiseunuseddev->mem_endvalueof"0xBAD"will
cause the driver to skip these parts of the probe. */
/* Reset card. Who knows what dain-bramaged state it was left in. */
{ unsignedlong reset_start_time = jiffies;
/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0) if (time_after(jiffies, reset_start_time + 2*HZ/100)) { if (bad_card) {
pr_cont(" (warning: no reset ack)"); break;
} else {
pr_cont(" not found (no reset ack).\n");
ret = -ENODEV; goto err_out;
}
}
outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
}
/* Read the 16 bytes of station address PROM. Wemustfirstinitializeregisters,similartoNS8390p_init(eifdev,0). Wecan'treliablyreadtheSAPROMaddresswithoutthis.
(I learned the hard way!). */
{ struct {unsignedchar 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 < ARRAY_SIZE(program_seq); i++)
outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
if (wordlength == 2)
{ for (i = 0; i < 16; i++)
SA_prom[i] = SA_prom[i+i]; /* We must set the 8390 for word mode. */
outb_p(DCR_VAL, ioaddr + EN0_DCFG);
start_page = NESM_START_PG;
/* Set up the rest of the parameters. */ if (neX000 || bad_card || copam) {
name = (wordlength == 2) ? "NE2000" : "NE1000";
} elseif (ctron)
{
name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
start_page = 0x01;
stop_page = (wordlength == 2) ? 0x40 : 0x20;
} else
{ #ifdef SUPPORT_NE_BAD_CLONES /* Ack! Well, there might be a *bad* NE*000 clone there.
Check for total bogus addresses. */ for (i = 0; bad_clone_list[i].name8; i++)
{ if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
SA_prom[2] == bad_clone_list[i].SAprefix[2])
{ if (wordlength == 2)
{
name = bad_clone_list[i].name16;
} else {
name = bad_clone_list[i].name8;
} break;
}
} if (bad_clone_list[i].name8 == NULL)
{
pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
SA_prom[14], SA_prom[15]);
ret = -ENXIO; goto err_out;
} #else
pr_cont(" not found.\n");
ret = -ENXIO; goto err_out; #endif
}
if (dev->irq < 2)
{ unsignedlong cookie = probe_irq_on();
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... */
mdelay(10); /* wait 10ms for interrupt to propagate */
outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
dev->irq = probe_irq_off(cookie); if (ne_msg_enable & NETIF_MSG_PROBE)
pr_cont(" autoirq is %d", dev->irq);
} elseif (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;
if (! dev->irq) {
pr_cont(" failed to detect IRQ line.\n");
ret = -EAGAIN; goto err_out;
}
/* Snarf the interrupt now. There's no point in waiting since we cannot
share and the board will usually be enabled. */
ret = request_irq(dev->irq, eip_interrupt, 0, name, dev); if (ret) {
pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret); goto err_out;
}
ei_local->msg_enable = ne_msg_enable;
ret = register_netdev(dev); if (ret) goto out_irq;
netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
name, ioaddr, dev->irq); return0;
netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
ei_status.txing = 0;
ei_status.dmaing = 0;
/* This check _should_not_ be necessary, omit eventually. */ while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
netdev_err(dev, "ne_reset_8390() did not complete.\n"); break;
}
outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
}
/* Grab the 8390 specific header. Similar to the block_input routine, but wedon'tneedtobeconcernedwithringwrapastheheaderwillbeat
the start of a page, so we optimize accordingly. */
staticvoid ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{ int nic_base = dev->base_addr;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing)
{
netdev_err(dev, "DMAing conflict in ne_get_8390_hdr " "[DMAstat:%d][irqlock:%d].\n",
ei_status.dmaing, ei_status.irqlock); return;
}
/* Block input and output, similar to the Crynwr packet driver. If you areportingtoanewethercard,lookatthepacketdriversourceforhints. TheNEx000doesn'tsharetheon-boardpacketmemory--youhavetoput
the packet out through the "remote DMA" dataport using outb. */
staticvoid ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{ #ifdef NE_SANITY_CHECK int xfer_count = count; struct ei_device *ei_local = netdev_priv(dev); #endif int nic_base = dev->base_addr; char *buf = skb->data;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (ei_status.dmaing)
{
netdev_err(dev, "DMAing conflict in ne_block_input " "[DMAstat:%d][irqlock:%d].\n",
ei_status.dmaing, ei_status.irqlock); return;
}
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); #ifdef NE_SANITY_CHECK
xfer_count++; #endif
}
} else {
insb(NE_BASE + NE_DATAPORT, buf, count);
}
#ifdef NE_SANITY_CHECK /* This was for the ALPHA version only, but enough people have beenencounteringproblemssoitisstillhere.Ifyousee thismessageyoueither1)haveaslightlyincompatibleclone
or 2) have noise/speed problems with your bus. */
if (netif_msg_rx_status(ei_local))
{ /* DMA termination address check... */ int addr, tries = 20; do { /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
-- it's broken for Rx on some cards! */ 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)
netdev_warn(dev, "RX transfer address mismatch," "%#4.4x (expected) vs. %#4.4x (actual).\n",
ring_offset + xfer_count, addr);
} #endif
outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
}
staticvoid ne_block_output(struct net_device *dev, int count, constunsignedchar *buf, constint start_page)
{ int nic_base = NE_BASE; unsignedlong dma_start; #ifdef NE_SANITY_CHECK int retries = 0; struct ei_device *ei_local = netdev_priv(dev); #endif
/* Round the count up for word writes. Do we need to do this? Whateffectwillanoddbytecounthaveonthe8390?
I should check someday. */
if (ei_status.word16 && (count & 0x01))
count++;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (ei_status.dmaing)
{
netdev_err(dev, "DMAing conflict in ne_block_output." "[DMAstat:%d][irqlock:%d]\n",
ei_status.dmaing, ei_status.irqlock); return;
}
ei_status.dmaing |= 0x01; /* We should already be in page 0, but to be safe... */
outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
#ifdef NE_SANITY_CHECK
retry: #endif
#ifdef NE_RW_BUGFIX /* Handle the read-before-write bug the same way as the Crynwrpacketdriver--theNatSemimethoddoesn'twork. Actuallythisdoesn'talwaysworkeither,butifyouhave
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 occurred. */
udelay(6); #endif
outb_p(ENISR_RDC, nic_base + EN0_ISR);
/* 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);
/* Update with any values found by probing, don't update if *resourceswerespecified.
*/ if (!res) {
io[this_dev] = dev->base_addr;
irq[this_dev] = dev->irq;
} return0;
}
if (IS_MODULE(CONFIG_NE2000) && retval) { if (io[0] == 0)
pr_notice("ne.c: You must supply \"io=0xNNN\"" " value(s) for ISA cards.\n");
ne_loop_rm_unreg(1); return retval;
}
/* Find an empty slot, that is no net_device and zero io port. */
this_dev = 0; while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
io[this_dev]) { if (++this_dev == MAX_NE_CARDS) return ERR_PTR(-ENOMEM);
}
/* Get irq, io from kernel command line */
dev = alloc_eip_netdev(); if (!dev) return ERR_PTR(-ENOMEM);
/* return the first device found */ for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { if (pdev_ne[this_dev]) {
dev = platform_get_drvdata(pdev_ne[this_dev]); if (dev) return dev;
}
}
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