/* hp.c: A HP LAN ethernet driver for linux. */ /* Written 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 is a driver for the HP LAN adaptors. The Author may be reached as becker@super.org or C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 */ static char *version = "hp.c:v0.67 3/8/93 Donald Becker (becker@super.org)\n"; #include #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 HP_DATAPORT 0x0c /* "Remote DMA" data port. */ #define HP_ID 0x07 #define HP_CONFIGURE 0x08 /* Configuration register. */ #define HP_RUN 0x01 /* 1 == Run, 0 == reset. */ #define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */ #define HP_DATAON 0x10 /* Turn on dataport */ #define NIC_OFFSET 0x10 /* Offset the 8390 registers. */ #define HP_START_PG 0x00 /* First page of TX buffer */ #define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */ #define HP_16BSTOP_PG 0xFF /* Last page +1 of RX ring */ extern void NS8390_init(struct device *dev, int startp); extern int ei_debug; extern struct sigaction ei_sigaction; int hpprobe(int ioaddr, struct device *dev); int hpprobe1(int ioaddr, struct device *dev); static void hp_reset_8390(struct device *dev); static int hp_block_input(struct device *dev, int count, char *buf, int ring_offset); static void hp_block_output(struct device *dev, int count, const unsigned char *buf, const start_page); static void hp_init_card(struct device *dev); /* The map from IRQ number to HP_CONFIGURE register setting. */ /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */ static char irqmap[16] = { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0}; /* Probe for an HP LAN adaptor. Also initialize the card and fill in STATION_ADDR with the station address. */ int hpprobe(int ioaddr, struct device *dev) { int *port, ports[] = {0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0}; if (ioaddr > 0x100) return hpprobe1(ioaddr, dev); for (port = &ports[0]; *port; port++) if (inb_p(*port) != 0xff && hpprobe1(*port, dev)) return dev->base_addr; return 0; } int hpprobe1(int ioaddr, struct device *dev) { int i; unsigned char *station_addr = dev->dev_addr; unsigned char SA_prom[6]; int tmp; int hplan; printk("HP-LAN ethercard probe at %#3x:", ioaddr); tmp = inb_p(ioaddr); if (tmp == 0xFF) { printk(" not found (nothing there).\n"); return 0; } for(i = 0; i < sizeof(SA_prom); i++) { SA_prom[i] = inb(ioaddr + i); if (i < ETHER_ADDR_LEN && station_addr) { printk(" %2.2x", SA_prom[i]); station_addr[i] = SA_prom[i]; } } hplan = (SA_prom[0] == 0x08 && SA_prom[1] == 0x00 && SA_prom[2] == 0x09); if (hplan == 0) { printk(" not found (invalid station address prefix).\n"); return 0; } ei_status.tx_start_page = HP_START_PG; ei_status.rx_start_page = HP_START_PG + TX_PAGES; /* Set up the rest of the parameters. */ if ((tmp = inb_p(HP_ID)) & 0x80) { ei_status.name = "HP27247"; ei_status.word16 = 1; ei_status.stop_page = HP_16BSTOP_PG; /* Safe for now */ } else { ei_status.name = "HP27250"; ei_status.word16 = 0; ei_status.stop_page = HP_8BSTOP_PG; /* Safe for now */ } /* Set the base address to point to the NIC! */ dev->base_addr = ioaddr + NIC_OFFSET; /* Snarf the interrupt now. There's no point in waiting since we cannot share and the board will usually be enabled. */ if (dev->irq < 2) { int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0}; int irq_8list[] = { 7, 5, 3, 4, 9, 0}; int *irqp = ei_status.word16 ? irq_16list : irq_8list; do { if (request_irq (dev->irq = *irqp, NULL) != -EBUSY) { autoirq_setup(0); /* Twinkle the interrupt, and check if it's seen. */ outb_p(irqmap[dev->irq] | HP_RUN, ioaddr + HP_CONFIGURE); outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE); 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 busy..", 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; if (irqaction(dev->irq, &ei_sigaction)) { printk (" unable to get IRQ %d.\n", dev->irq); return 0; } } printk("\n%s: %s using IRQ %d.\n", dev->name, ei_status.name, dev->irq); if (ei_debug > 1) printk(version); ei_status.reset_8390 = &hp_reset_8390; ei_status.block_input = &hp_block_input; ei_status.block_output = &hp_block_output; hp_init_card(dev); return dev->base_addr; } static void hp_reset_8390(struct device *dev) { int hp_base = dev->base_addr - NIC_OFFSET; int saved_config = inb_p(hp_base + HP_CONFIGURE); int reset_start_time = jiffies; if (ei_debug > 1) printk("resetting the 8390 time=%d...", jiffies); outb_p(0x00, hp_base + HP_CONFIGURE); 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(saved_config, hp_base + HP_CONFIGURE); while ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0) if (jiffies - reset_start_time > 2) { printk("%s: hp_reset_8390() did not complete.\n", dev->name); return; } if (ei_debug > 1) printk("8390 reset done.", jiffies); } /* 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 HP LAN doesn't use shared memory -- we put the packet out through the "remote DMA" dataport. */ static int hp_block_input(struct device *dev, int count, char *buf, int ring_offset) { int nic_base = dev->base_addr; int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE); int xfer_count = count; outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE); outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base); 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); if (ei_status.word16) { port_read(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1); if (count & 0x01) buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++; } else { port_read_b(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count); } /* 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("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n", dev->name, ring_offset + xfer_count, addr); } outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE); return ring_offset + count; } static void hp_block_output(struct device *dev, int count, const unsigned char *buf, const start_page) { int nic_base = dev->base_addr; int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE); outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE); /* 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, nic_base); #ifdef ei8390_bug /* Handle the read-before-write bug the same way as the Crynwr packet driver -- the NatSemi method doesn't work. */ outb_p(0x42, nic_base + EN0_RCNTLO); outb_p(0, nic_base + EN0_RCNTHI); outb_p(0xff, 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. */ inb_p(0x61); inb_p(0x61); #endif 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); if (ei_status.word16) { /* Use the 'rep' sequence for 16 bit boards. */ port_write(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1); } else { port_write_b(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count); } /* 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("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n", dev->name, (start_page << 8) + count, addr); } outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE); return; } /* This function resets the ethercard if something screws up. */ static void hp_init_card(struct device *dev) { int irq = dev->irq; NS8390_init(dev, 0); outb_p(irqmap[irq&0x0f] | HP_RUN, dev->base_addr - NIC_OFFSET + HP_CONFIGURE); return; } /* * Local variables: * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c hp.c" * version-control: t * kept-new-versions: 5 * End: */