/* 3c503.c: A 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 the 3c503 and 3c503/16. It must be used in shared memory mode. The Author may be reached as becker@super.org or C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 */ static char *version = "3c503.c:v0.67 3/8/93 Donald Becker (becker@super.org)\n"; #include #include #include #include #include #include #include "dev.h" #include "8390.h" #include "3c503reg.h" extern void NS8390_init(struct device *dev, int startp); extern int ei_debug; extern struct sigaction ei_sigaction; int el2autoprobe(int ioaddr, struct device *dev); int el2probe(int ioaddr, struct device *dev); static void el2_reset_8390(struct device *dev); static void el2_init_card(struct device *dev); static void el2_block_output(struct device *dev, int count, const unsigned char *buf, const start_page); static int el2_block_input(struct device *dev, int count, char *buf, int ring_offset); int el2autoprobe(int ioaddr, struct device *dev) { int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0}; int ports[] = {0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0}; /* Non-autoprobe case first: */ if (ioaddr > 0) return el2probe(ioaddr, dev); /* We check for a memory-mapped 3c503 board by looking at the port location bitmap at the end of the jumpered boot PROM space. This works even if a PROM isn't there. */ for (addr = addrs; *addr; addr++) { int i; unsigned int base_bits = *(unsigned char *)*addr; /* Find first set bit. */ for(i = 7; i >= 0; i--, base_bits >>= 1) if (base_bits & 0x1) break; if (base_bits == 1 && el2probe(ports[i], dev)) return dev->base_addr; } #ifndef ignore_nonshared_memory /* It's not memory mapped, bummer. Try all of the locations that aren't obviously empty. */ { int i; for (i = 0; i < 8; i++) if (inb_p(ports[i] + 0x403) == (0x80 >> i) /* Preliminary check */ && el2probe(ports[i], dev)) return dev->base_addr; } #endif /* probe_nonshared_memory */ return 0; } /* Probe for the Etherlink II card at I/O port base IOADDR, returning non-zero on sucess. If found, set the station address and memory parameters in DEVICE. */ int el2probe(int ioaddr, struct device *dev) { int i, iobase_reg, membase_reg, saved_406; unsigned char *station_addr = dev->dev_addr; /* We verify that it's a 3C503 board by checking the first three octets of its ethernet address. */ printk("3c503 probe at %#3x:", ioaddr); iobase_reg = inb(ioaddr+0x403); membase_reg = inb(ioaddr+0x404); /* Verify ASIC register that should be 0 or have a single bit set. */ if ( (iobase_reg & (iobase_reg - 1)) || (membase_reg & (membase_reg - 1))) { printk(" not found.\n"); return 0; } saved_406 = inb_p(ioaddr + 0x406); outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */ outb_p(ECNTRL_THIN, ioaddr + 0x406); /* Map the station addr PROM into the lower I/O ports. */ outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406); for (i = 0; i < ETHER_ADDR_LEN; i++) { printk(" %2.2X", (station_addr[i] = inb(ioaddr + i))); } if ( station_addr[0] != 0x02 || station_addr[1] != 0x60 || station_addr[2] != 0x8c) { printk(" 3C503 not found.\n"); /* Restore the register we frobbed. */ outb_p(saved_406, ioaddr + 0x406); return 0; } /* Map the 8390 back into the window. */ outb(ECNTRL_THIN, ioaddr + 0x406); dev->base_addr = ioaddr; /* Probe for, turn on and clear the board's shared memory. */ if (ei_debug > 2) printk(" memory jumpers %2.2x ", membase_reg); outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */ if ((membase_reg & 0xf0) == 0) { dev->mem_start = 0; } else { dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) + ((membase_reg & 0xA0) ? 0x4000 : 0); #define EL2_MEMSIZE (EL2SM_STOP_PG - EL2SM_START_PG)*256 #ifdef EL2MEMTEST /* This has never found an error, but someone might care. */ { /* Check the card's memory. */ int *mem_base = (int *)dev->mem_start; int memtest_value = 0xbbadf00d; mem_base[0] = 0xba5eba5e; for (i = 1; i < EL2_MEMSIZE/sizeof(mem_base[0]); i++) { mem_base[i] = memtest_value; if (mem_base[0] != 0xba5eba5e || mem_base[i] != memtest_value) { printk(" memory failure or memory address conflict.\n"); dev->mem_start = 0; break; } memtest_value += 0x55555555; mem_base[i] = 0; } } #endif /* EL2MEMTEST */ /* Divide the on-board memory into a single maximum-sized transmit (double-sized for ping-pong transmit) buffer at the base, and use the rest as a receive ring. */ dev->mem_end = dev->rmem_end = dev->mem_start + EL2_MEMSIZE; dev->rmem_start = TX_PAGES*256 + dev->mem_start; } if (ei_debug > 2) printk("\n3c503: memory params start=%#5x rstart=%#5x end=%#5x rend=%#5x.\n", dev->mem_start, dev->rmem_start, dev->mem_end, dev->rmem_end); /* Finish setting the board's parameters. */ ei_status.name = "3C503"; ei_status.tx_start_page = EL2SM_START_PG; ei_status.rx_start_page = EL2SM_START_PG + TX_PAGES; ei_status.stop_page = EL2SM_STOP_PG; ei_status.reset_8390 = &el2_reset_8390; ei_status.block_input = &el2_block_input; ei_status.block_output = &el2_block_output; /* This should be probed for (or set via an ioctl()) at run-time someday. */ #if defined(EI8390_THICK) || defined(EL2_AUI) ei_status.thin_bit = 0; #else ei_status.thin_bit = ECNTRL_THIN; #endif if (dev->irq < 2) { int irqlist[] = {5, 9, 3, 4, 0}; int *irqp = irqlist; do { if (request_irq (dev->irq = *irqp, NULL) != -EBUSY) { /* Twinkle the interrupt, and check if it's seen. */ autoirq_setup(0); outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR); outb_p(0x00, E33G_IDCFR); if (dev->irq == autoirq_report(0) /* It's a good IRQ line! */ && request_irq (dev->irq, &ei_interrupt) == 0) { printk(" got IRQ %d", dev->irq); break; } else printk(" IRQ%d bad..", dev->irq); } } while (*++irqp); if (*irqp == 0) { printk(" unable to find an free IRQ line.\n"); return 0; } } else { if (dev->irq == 2) dev->irq = 9; else if (dev->irq > 5 && dev->irq != 9) { printk("\n3c503: configured interrupt number %d out of range.\n", dev->irq); return 0; } if (request_irq(dev->irq, &ei_interrupt)) { printk (" unable to get IRQ%d.\n", dev->irq); return 0; } } dev->start = 0; el2_init_card(dev); if (dev->mem_start) printk("\n%s: %s using IRQ %d with shared memory at %#6x-%#6x,\n", dev->name, ei_status.name, dev->irq, dev->mem_start, dev->mem_end-1); else printk("\n%s: %s using IRQ %d with programmed I/O.\n", dev->name, ei_status.name, dev->irq); if (ei_debug > 1) printk(version); return ioaddr; } /* This is called whenever we have a unrecoverable failure: transmit timeout Bad ring buffer packet header */ static void el2_reset_8390(struct device *dev) { if (ei_debug > 1) { printk("%s: Resetting the 3c503 board...", dev->name); printk("%#x=%#02x %#x=%#02x %#x=%#02x...", E33G_IDCFR, inb(E33G_IDCFR), E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR)); } outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL); ei_status.txing = 0; outb_p(ei_status.thin_bit, E33G_CNTRL); el2_init_card(dev); if (ei_debug > 1) printk("done\n"); } /* Initialize the 3c503 GA registers after a reset. */ static void el2_init_card(struct device *dev) { /* Unmap the station PROM and select the DIX or BNC connector. */ outb_p(ei_status.thin_bit, E33G_CNTRL); /* Set ASIC copy of rx's first and last+1 buffer pages */ /* These must be the same as in the 8390. */ outb(ei_status.rx_start_page, E33G_STARTPG); outb(ei_status.stop_page, E33G_STOPPG); /* Point the vector pointer registers somewhere ?harmless?. */ outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */ outb(0xff, E33G_VP1); outb(0x00, E33G_VP0); /* Turn off all interrupts until we're opened. */ outb_p(0x00, dev->base_addr + EN0_IMR); /* Enable IRQs iff started. */ outb(EGACFR_NORM, E33G_GACFR); /* Set the interrupt line. */ outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR); outb_p(8, E33G_DRQCNT); /* Set burst size to 8 */ outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */ outb_p(0x00, E33G_DMAAL); return; /* We always succeed */ } /* Either use the shared memory (if enabled on the board) or put the packet out through the ASIC FIFO. The latter is probably much slower. */ static void el2_block_output(struct device *dev, int count, const unsigned char *buf, const start_page) { int i; /* Buffer index */ int boguscount = 0; /* timeout counter */ /* This should really be set with during an open(). */ outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */ if (dev->mem_start) { /* Shared memory transfer */ void *dest_addr = (void *)(dev->mem_start + ((start_page - ei_status.tx_start_page) << 8)); memcpy(dest_addr, buf, count); if (ei_debug > 2 && memcmp(dest_addr, buf, count)) printk("%s: 3c503 send_packet() bad memory copy @ %#5x.\n", dev->name, dest_addr); else if (ei_debug > 4) printk("%s: 3c503 send_packet() good memory copy @ %#5x.\n", dev->name, dest_addr); return; } /* No shared memory, put the packet out the slow way. */ /* Set up then start the internal memory transfer to Tx Start Page */ outb(0x00, E33G_DMAAL); outb_p(start_page, E33G_DMAAH); outb_p(ei_status.thin_bit | ECNTRL_OUTPUT | ECNTRL_START, E33G_CNTRL); /* This is the byte copy loop: it should probably be tuned for for speed once everything is working. I think it is possible to output 8 bytes between each check of the status bit. */ for(i = 0; i < count; i++) { if (i % 8 == 0) while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) if (++boguscount > (i<<3) + 32) { printk("%s: FIFO blocked in el2_block_output (at %d of %d, bc=%d).\n", dev->name, i, count, boguscount); return; } outb(buf[i], E33G_FIFOH); } outb(ei_status.thin_bit, E33G_CNTRL); return; } /* Returns the new ring pointer. */ static int el2_block_input(struct device *dev, int count, char *buf, int ring_offset) { int boguscount = 0; int end_of_ring = dev->rmem_end; unsigned int i; /* Maybe enable shared memory just be to be safe... nahh.*/ if (dev->mem_start) { /* Use the shared memory. */ ring_offset -= (EL2SM_START_PG<<8); if (dev->mem_start + ring_offset + count > end_of_ring) { /* We must wrap the input move. */ int semi_count = end_of_ring - (dev->mem_start + ring_offset); if (ei_debug > 4) printk("%s: 3c503 block_input() @ %#5x+%x=%5x.\n", dev->name, dev->mem_start, ring_offset, (char *)dev->mem_start + ring_offset); memcpy(buf, (char *)dev->mem_start + ring_offset, semi_count); count -= semi_count; memcpy(buf + semi_count, (char *)dev->rmem_start, count); return dev->rmem_start + count; } if (ei_debug > 4) printk("%s: 3c503 block_input() @ %#5x+%x=%5x.\n", dev->name, dev->mem_start, ring_offset, (char *)dev->mem_start + ring_offset); memcpy(buf, (char *)dev->mem_start + ring_offset, count); return ring_offset + count; } /* No shared memory, use programmed I/O. */ outb(ring_offset & 0xff, E33G_DMAAL); outb_p((ring_offset >> 8) & 0xff, E33G_DMAAH); outb_p(ei_status.thin_bit | ECNTRL_INPUT | ECNTRL_START, E33G_CNTRL); /* This is the byte copy loop: it should probably be tuned for for speed once everything is working. */ for(i = 0; i < count; i++) { if (i % 8 == 0) while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) if (++boguscount > (i<<3) + 32) { printk("%s: FIFO blocked in el2_block_input() (at %d of %d, bc=%d).\n", dev->name, i, count, boguscount); boguscount = 0; break; } buf[i] = inb_p(E33G_FIFOH); } outb(ei_status.thin_bit, E33G_CNTRL); return 0; } /* * Local variables: * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c 3c503.c" * version-control: t * kept-new-versions: 5 * End: */