/* rtl8029.c: A general non-shared-memory RTL8019 ethernet driver for linux. */ /* Written 1992-94 by Donald Backer. 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. The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O Center of Excellence in Space Data and Information Sciences Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 */ /* Routines for the Realtek-based designs (RTL8029). */ static char *version = "rtl8029.c:v1.10 10/23/96 \n"; #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "8390.h" extern struct device *init_etherdev(struct device *dev, int sizeof_private, unsigned long *mem_startp); #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 */ #define NE_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */ static unsigned char pci_irq_line; int r9e_probe(struct device *dev); static int r9e_probe1(struct device *dev, int ioaddr); static void r9e_reset_8390(struct device *dev); static int r9e_block_input(struct device *dev, int count, char *buf, int ring_offset); static void r9e_block_output(struct device *dev, const int count, const unsigned char *buf, const int start_page); #ifdef HAVE_DEVLIST struct netdev_entry netcard_drv = {"r9e", r9e_probe1, NE_IO_EXTENT}; #else int r9e_probe(struct device *dev) { int exist=0; unsigned long pci_addr=0; if(pcibios_present()) { int pci_index; printk("RTL8029: PCI bios is present \n"); for (pci_index=0; pci_index<8;pci_index++) { unsigned char pci_bus, pci_device_fn; if(pcibios_find_device(PCI_VENDOR_ID_REALTEK,PCI_DEVICE_ID_REALTEK_8029 ,pci_index,&pci_bus,&pci_device_fn)!=0) break; /* fetch IO and IRQ on the pci_configuration_table */ pcibios_read_config_byte(pci_bus,pci_device_fn,PCI_INTERRUPT_LINE, &pci_irq_line); pcibios_read_config_dword(pci_bus,pci_device_fn,PCI_BASE_ADDRESS_0, &pci_addr); pci_addr=pci_addr & 0x0000fffe; /* mask the bit0 */ r9e_probe1(dev,pci_addr); exist=1; } } if(exist==1) /* 8029 adapter exist */ return 0; return ENODEV; } #endif static int r9e_probe1(struct device *dev, int ioaddr) { int i; unsigned char SA_prom[32]; int wordlength = 2; char *name = NULL; int start_page, stop_page; int reg0 = inb_p(ioaddr); if (reg0 == 0xFF) return ENODEV; /* 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. */ return ENODEV; } } printk("RTL8029 ethercard probe at %#3x:", ioaddr); /* Read the 16 bytes of station address PROM. 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; } /* 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]; start_page = NESM_START_PG; stop_page = NESM_STOP_PG; for(i = 0; i < ETHER_ADDR_LEN; i++) { dev->dev_addr[i] = SA_prom[i]; printk(" %2.2x", SA_prom[i]); } /* Set up the rest of the parameters. */ name = "RTL8029"; dev = init_etherdev(0, sizeof(struct ei_device), 0); dev->irq=pci_irq_line; { int irqval = request_irq (dev->irq, ei_interrupt, 0, "RTL8029"); if (irqval) { printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval); return EAGAIN; } } dev->base_addr = ioaddr; request_region(ioaddr, NE_IO_EXTENT, "RTL8029"); for(i = 0; i < ETHER_ADDR_LEN; i++) dev->dev_addr[i] = SA_prom[i]; 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 = &r9e_reset_8390; ei_status.block_input = &r9e_block_input; ei_status.block_output = &r9e_block_output; NS8390_init(dev, 0); return 0; } /* 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 r9e_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: r9e_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 r9e_block_input(struct device *dev, int count, char *buf, int ring_offset) { #ifdef CONFIG_NE_SANITY int xfer_count = count; #endif int nic_base = dev->base_addr; /* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (set_bit(0,(void*)&ei_status.dmaing)) { if (ei_debug > 0) printk("%s: DMAing conflict in ne_block_input " "[DMAstat:%d][irqlock:%d][intr:%d].\n", dev->name, ei_status.dmaing, ei_status.irqlock, dev->interrupt); return 0; } ei_status.dmaing |= 0x02; 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 CONFIG_NE_SANITY xfer_count++; #endif } } else { insb(NE_BASE + NE_DATAPORT, buf, count); } /* 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. */ #ifdef CONFIG_NE_SANITY 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 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) printk("%s: RX transfer address mismatch," "%#4.4x (expected) vs. %#4.4x (actual).\n", dev->name, ring_offset + xfer_count, addr); } #endif outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ ei_status.dmaing &= ~0x03; return ring_offset + count; } static void r9e_block_output(struct device *dev, int count, const unsigned char *buf, const int start_page) { #ifdef CONFIG_NE_SANITY int retries = 0; #endif int nic_base = NE_BASE; unsigned long dma_start; /* 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 (set_bit(0,(void*)&ei_status.dmaing)) { if (ei_debug > 0) printk("%s: DMAing conflict in ne_block_output." "[DMAstat:%d][irqlock:%d][intr:%d]\n", dev->name, ei_status.dmaing, ei_status.irqlock, dev->interrupt); return; } ei_status.dmaing |= 0x04; /* We should already be in page 0, but to be safe... */ outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); #ifdef CONFIG_NE_SANITY retry: #endif #ifdef CONFIG_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. */ SLOW_DOWN_IO; SLOW_DOWN_IO; SLOW_DOWN_IO; #endif /* rw_bugfix */ 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); 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); } dma_start = jiffies; #ifdef CONFIG_NE_SANITY /* This was for the ALPHA version only, but enough people have been encountering problems so it is still here. */ if (ei_debug > 1) { /* DMA termination address check... */ int addr, tries = 20; do { 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; } } #endif while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0) if (jiffies - dma_start > NE_RDC_TIMEOUT) { printk("%s: timeout waiting for Tx RDC.\n", dev->name); r9e_reset_8390(dev); NS8390_init(dev,1); break; } outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ ei_status.dmaing &= ~0x05; return; } /* * Local variables: * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c rtl8029.c" * version-control: t * kept-new-versions: 5 * End: */