// SPDX-License-Identifier: GPL-1.0+ /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */ /* Written 1992-94 by Donald Becker.
Copyright 1993 United States Government as represented by the Director, National Security Agency.
The author may be reached as becker@scyld.com, or C/O Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
This driver should work with many programmed-I/O 8390-based ethernet boards. Currently it supports the NE1000, NE2000, many clones, and some Cabletron products.
Changelog:
Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made sanity checks and bad clone support optional. Paul Gortmaker : new reset code, reset card after probe at boot. Paul Gortmaker : multiple card support for module users. Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c Paul Gortmaker : Allow users with bad cards to avoid full probe. Paul Gortmaker : PCI probe changes, more PCI cards supported. rjohnson@analogic.com : Changed init order so an interrupt will only occur after memory is allocated for dev->priv. Deallocated memory last in cleanup_modue() Richard Guenther : Added support for ISAPnP cards Paul Gortmaker : Discontinued PCI support - use ne2k-pci.c instead. Hayato Fujiwara : Add m32r support.
*/
/* 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 that the ne2k probe is the last 8390 based probe to take place (as it is at boot) and so the probe will get confused by any other 8390 cards.
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 */
/* 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 compensated 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. */
/* 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)) return 0;
#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) return 0;
} #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; return 0;
}
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 does not have a valid 0x57,0x57 signature can still use this without having to recompile. Specifying an i/o address along with an otherwise unused dev->mem_end value of "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. We must first initialize registers, similar to NS8390p_init(eifdev, 0). We can't reliably read the SAPROM address without this.
(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;
/* * Realtek RTL8019AS datasheet says that the PSTOP register * shouldn't exceed 0x60 in 8-bit mode. * This chip can be identified by reading the signature from * the remote byte count registers (otherwise write-only)...
*/ if ((DCR_VAL & 0x01) == 0 && /* 8-bit mode */
inb(ioaddr + EN0_RCNTLO) == 0x50 &&
inb(ioaddr + EN0_RCNTHI) == 0x70)
stop_page = 0x60; else
stop_page = NESM_STOP_PG;
} else {
start_page = NE1SM_START_PG;
stop_page = NE1SM_STOP_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); return 0;
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 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. */
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 are porting to a new ethercard, look at the packet driver source for hints. The NEx000 doesn't share the on-board packet memory -- you have to put
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 been encountering problems so it is still here. If you see this message you either 1) have a slightly incompatible clone
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? What effect will an odd byte count have on the 8390?
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 Crynwr packet driver -- the NatSemi method doesn't work. Actually this doesn't always 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 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);
dev = alloc_eip_netdev(); if (!dev) return -ENOMEM;
/* ne.c doesn't populate resources in platform_device, but * rbtx4927_ne_init and rbtx4938_ne_init do register devices * with resources.
*/
res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res) {
dev->base_addr = res->start;
dev->irq = platform_get_irq(pdev, 0);
} else { if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
free_netdev(dev); return -EINVAL;
}
dev->base_addr = io[this_dev];
dev->irq = irq[this_dev];
dev->mem_end = bad[this_dev];
}
SET_NETDEV_DEV(dev, &pdev->dev);
err = do_ne_probe(dev); if (err) {
free_netdev(dev); return err;
}
platform_set_drvdata(pdev, dev);
/* Update with any values found by probing, don't update if * resources were specified.
*/ if (!res) {
io[this_dev] = dev->base_addr;
irq[this_dev] = dev->irq;
} return 0;
}
if (dev) { struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
netif_device_detach(dev);
unregister_netdev(dev); if (idev)
pnp_device_detach(idev); /* Careful ne_drv_remove can be called twice, once from * the platform_driver.remove and again when the * platform_device is being removed.
*/
ei_status.priv = 0;
free_irq(dev->irq, dev);
release_region(dev->base_addr, NE_IO_EXTENT);
free_netdev(dev);
}
}
/* Remove unused devices or all if true. */ staticvoid ne_loop_rm_unreg(int all)
{ int this_dev; struct platform_device *pdev; for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
pdev = pdev_ne[this_dev]; /* No network device == unused */ if (pdev && (!platform_get_drvdata(pdev) || all)) {
ne_drv_remove(pdev);
platform_device_unregister(pdev);
pdev_ne[this_dev] = NULL;
}
}
}
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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