/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */ /* Written 1992,1993 by Donald Becker. This is alpha test code. This is a extension to the Linux operating system, and is covered by same Gnu Public License that covers that work. This driver should work with many 8390-based ethernet boards. Currently it support the NE1000, NE2000 (and clones), and some Cabletron products. 8-bit ethercard support is enabled with #define EI_8BIT 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:v0.27 1/27/93 Donald Becker (becker@super.org)\n"; #include #include #include #include #include #include "dev.h" #include "8390.h" /* These should be in someday, borrowed from blk_drv/hd.c. */ #define port_read(port,buf,nr) \ __asm__("cld;rep;insw"::"d" (port),"D" (buf),"c" (nr):"cx","di") #define port_write(port,buf,nr) \ __asm__("cld;rep;outsw"::"d" (port),"S" (buf),"c" (nr):"cx","si") #define port_read_b(port,buf,nr) \ __asm__("cld;rep;insb"::"d" (port),"D" (buf),"c" (nr):"cx","di") #define port_write_b(port,buf,nr) \ __asm__("cld;rep;outsb"::"d" (port),"S" (buf),"c" (nr):"cx","si") #define EN_CMD (dev->base_addr) #define NE_BASE (dev->base_addr) #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 */ extern void NS8390_init(struct device *dev, int startp); extern int ei_debug; extern struct sigaction ei_sigaction; extern struct ei_device ei_status; int neprobe(int ioaddr, struct device *dev); static int neprobe1(int ioaddr, struct device *dev); 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); static void ne_init_card(struct device *dev); /* Probe for the NE1000 and NE2000. NEx000-like boards have 0x57,0x57 in bytes 0x0e,0x0f of the SAPROM, but if we read by 16 bit words the NE1000 appears to have 0x00, 0x42. */ /* Also initialize the card and fill in STATION_ADDR with the station address. The station address (and other data) is stored in the packet buffer memory space, 32 bytes starting at remote DMA address 0. */ int neprobe(int ioaddr, struct device *dev) { int *port, ports[] = {0x300, 0x320, 0x340, 0x360, 0}; if (ioaddr > 0x100) return neprobe1(ioaddr, dev); for (port = &ports[0]; *port; port++) if (inb_p(*port) != 0xff && neprobe1(*port, dev)) return dev->base_addr = *port; return 0; } static int neprobe1(int ioaddr, struct device *dev) { int i; unsigned char *station_addr = dev->dev_addr; unsigned char SA_prom[32]; int cmdreg; int ne2000 = 0, ne1000 = 0, ctron = 0; printk("8390 ethercard probe at %#3x:", ioaddr); cmdreg = inb_p(ioaddr); if (cmdreg == 0xFF) { printk(" not found (%#2.2x).\n", cmdreg); return 0; } /* Ooops, we must first initialize registers -- we can't just read the PROM address right away. (Learned the hard way.) */ /* NS8390_init(eifdev, 0);*/ outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr); #ifdef EI_8BIT outb_p(0x48, ioaddr + EN0_DCFG); /* Set byte-wide for probe. */ #else outb_p(0x49, ioaddr + EN0_DCFG); /* Set word-wide for probe. */ #endif /* Even though we'll set them soon, we must clear them! */ outb_p(0x00, ioaddr + EN0_RCNTLO); outb_p(0x00, ioaddr + EN0_RCNTHI); outb_p(0x00, ioaddr + EN0_IMR); /* Mask completion irq. */ outb_p(0xFF, ioaddr + EN0_ISR); /* Set to monitor and loopback mode. */ outb_p(E8390_RXOFF, ioaddr + EN0_RXCR); /* 0x20 */ outb_p(E8390_TXOFF, ioaddr + EN0_TXCR); /* 0x02 */ #ifdef EI_8BIT outb_p(sizeof(SA_prom), ioaddr + EN0_RCNTLO); #else /* Double count 0x20 words, the SA PROM is only byte wide. */ outb_p(2*sizeof(SA_prom), ioaddr + EN0_RCNTLO); #endif outb_p(0x00, ioaddr + EN0_RCNTHI); outb_p(0x00, ioaddr + EN0_RSARLO); /* DMA starting at 0x0000. */ outb_p(0x00, ioaddr + EN0_RSARHI); outb_p(E8390_RREAD+E8390_START, ioaddr); for(i = 0; i < sizeof(SA_prom); i++) { SA_prom[i] = inb_p(ioaddr + NE_DATAPORT); if (i < ETHER_ADDR_LEN && station_addr) { printk(" %2.2x", SA_prom[i]); station_addr[i] = SA_prom[i]; } } #ifdef EI_8BIT ne1000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57); #else ne2000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57); ne1000 = (SA_prom[14] == 0x00 && SA_prom[15] == 0x42); ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d); #endif /* Set up the rest of the parameters. */ if (ne1000) { ei_status.name = "NE1000"; ei_status.word16 = 0; ei_status.tx_start_page = NE1SM_START_PG; ei_status.rx_start_page = NE1SM_START_PG + TX_PAGES; ei_status.stop_page = NE1SM_STOP_PG; } else if (ne2000) { ei_status.name = "NE2000"; ei_status.word16 = 1; ei_status.tx_start_page = NESM_START_PG; ei_status.rx_start_page = NESM_START_PG + TX_PAGES; ei_status.stop_page = NESM_STOP_PG; } else if (ctron) { /* You'll have to set these yourself, but this info might be useful. Cabletron packet buffer locations: 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. */ ei_status.name = "Cabletron"; ei_status.word16 = 1; ei_status.tx_start_page = 0x01; ei_status.rx_start_page = 0x01 + TX_PAGES; #ifndef CTRON_MEMSIZE #define CTRON_MEMSIZE 0x20 /* Extra safe... */ #endif ei_status.stop_page = CTRON_MEMSIZE; } else { printk(" not found.\n"); return 0; } dev->base_addr = ioaddr; if (dev->irq < 2) { int nic_base = dev->base_addr; autoirq_setup(0); outb_p(0x50, nic_base + EN0_IMR); /* Enable one interrupt. */ outb_p(0x00, nic_base + EN0_RCNTLO); outb_p(0x00, nic_base + EN0_RCNTHI); outb_p(E8390_RREAD+E8390_START, nic_base); /* Trigger it... */ outb_p(0x00, nic_base + 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; } } printk(" %s found, using IRQ %d.\n", ei_status.name, dev->irq); if (ei_debug > 1) printk(version); ei_status.reset_8390 = &ne_reset_8390; ei_status.block_input = &ne_block_input; ei_status.block_output = &ne_block_output; ne_init_card(dev); return dev->base_addr; } 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=%d...", jiffies); ei_status.txing = 0; sti(); /* We shouldn't use the boguscount for timing, but this hasn't been checked yet, and you could hang your machine if jiffies break... */ { int boguscount = 150000; while(jiffies - reset_start_time < 2) if (boguscount-- < 0) { printk("jiffy failure (t=%d)...", jiffies); break; } } outb_p(tmp, NE_BASE + NE_RESET); while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) if (jiffies - reset_start_time > 2) { printk(EI_NAME": ne_reset_8390() did not complete.\n"); 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 have shared memory on the board -- put the packet out through the "remote DMA" dataport. */ static int ne_block_input(struct device *dev, int count, char *buf, int ring_offset) { int xfer_count = count; int nic_base = NE_BASE; outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, EN_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, EN_CMD); if (ei_status.word16) { port_read(NE_BASE + NE_DATAPORT,buf,count>>1); if (count & 0x01) buf[count-1] = inb(NE_BASE + NE_DATAPORT), xfer_count++; } else { /* Input the bytes with a slow 8-bit loop. Someday change this to: port_read_b(NE_BASE + NE_DATAPORT, buf, count); */ int i; /* Input the bytes with a slow 8-bit loop. Tune this someday. */ for(i = 0; i < count; i++) { buf[i] = inb_p(NE_BASE + NE_DATAPORT); } } /* This is for the ALPHA version only, remove for later releases. */ if (ei_debug > 0) { /* DMA termination address check... */ int high = inb_p(nic_base + EN0_RSARHI); int low = inb_p(nic_base + EN0_RSARLO); int addr = (high << 8) + low; /* Check only the lower 8 bits so we can ignore ring wrap. */ if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff)) printk(EI_NAME": RX transfer address mismatch, %#4.4x (should be) vs. %#4.4x (actual).\n", ring_offset + xfer_count, addr); } return ring_offset + count; } static void ne_block_output(struct device *dev, int count, const unsigned char *buf, const int start_page) { int i, 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++; /* We should already be in page 0, but to be safe... */ outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, EN_CMD); retry: #if !defined(no_rw_bugfix) && 0 /* 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, EN_CMD); /* Make certain that the dummy read has occured. */ SLOW_DOWN_IO; SLOW_DOWN_IO; SLOW_DOWN_IO; #endif /* no_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, EN_CMD); if (ei_status.word16) { /* Use the 'rep' sequence for 16 bit boards. */ port_write(NE_BASE + NE_DATAPORT, buf, count>>1); } else { /* Output the bytes with a slow 8-bit loop. Someday change this to: port_write_b(NE_BASE + NE_DATAPORT, buf, count); */ /* Output the bytes with a slow 8-bit loop. This actually is almost as fast as possible, but it does tie up the processor. We could also use a 'rep' sequnce here. */ for(i = 0; i < count; i++) outb_p(buf[i], NE_BASE + NE_DATAPORT); } /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */ /* This is for the ALPHA version only, remove for later releases. */ if (ei_debug > 0) { /* DMA termination address check... */ int high = inb_p(nic_base + EN0_RSARHI); int low = inb_p(nic_base + EN0_RSARLO); int addr = (high << 8) + low; if ((start_page << 8) + count != addr) printk(EI_NAME": Packet buffer transfer address mismatch on TX, %#4.4x vs. %#4.4x.\n", (start_page << 8) + count, addr); if (retries++ == 0) goto retry; } return; } /* This function resets the ethercard if something screws up. */ static void ne_init_card(struct device *dev) { NS8390_init(dev, 0); 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: */