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- /* hp.c: A HP LAN ethernet driver for linux. */
- /*
- Written 1993-94 by Donald Becker.
-
- 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
-
- This is a driver for the HP PC-LAN adaptors.
-
- Sources:
- The Crynwr packet driver.
- */
-
- static char *version =
- "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
-
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/ioport.h>
- #include <asm/system.h>
- #include <asm/io.h>
-
- #include <linux/netdevice.h>
- #include "8390.h"
-
- extern struct device *init_etherdev(struct device *dev, int sizeof_private,
- unsigned long *mem_startp);
-
- /* A zero-terminated list of I/O addresses to be probed. */
- static unsigned int hppclan_portlist[] =
- { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
-
- #define HP_IO_EXTENT 32
-
- #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 /* Same, for 16 bit cards. */
-
- int hp_probe(struct device *dev);
- int hp_probe1(struct device *dev, int ioaddr);
-
- 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. */
- #ifdef HAVE_DEVLIST
- struct netdev_entry netcard_drv =
- {"hp", hp_probe1, HP_IO_EXTENT, hppclan_portlist};
- #else
-
- int hp_probe(struct device *dev)
- {
- int i;
- int base_addr = dev ? dev->base_addr : 0;
-
- if (base_addr > 0x1ff) /* Check a single specified location. */
- return hp_probe1(dev, base_addr);
- else if (base_addr != 0) /* Don't probe at all. */
- return ENXIO;
-
- for (i = 0; hppclan_portlist[i]; i++) {
- int ioaddr = hppclan_portlist[i];
- if (check_region(ioaddr, HP_IO_EXTENT))
- continue;
- if (hp_probe1(dev, ioaddr) == 0)
- return 0;
- }
-
- return ENODEV;
- }
- #endif
-
- int hp_probe1(struct device *dev, int ioaddr)
- {
- int i, board_id, wordmode;
- char *name;
-
- /* Check for the HP physical address, 08 00 09 xx xx xx. */
- /* This really isn't good enough: we may pick up HP LANCE boards
- also! Avoid the lance 0x5757 signature. */
- if (inb(ioaddr) != 0x08
- || inb(ioaddr+1) != 0x00
- || inb(ioaddr+2) != 0x09
- || inb(ioaddr+14) == 0x57)
- return ENODEV;
-
- /* Set up the parameters based on the board ID.
- If you have additional mappings, please mail them to me -djb. */
- if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
- name = "HP27247";
- wordmode = 1;
- } else {
- name = "HP27250";
- wordmode = 0;
- }
-
- if (dev == NULL)
- dev = init_etherdev(0, sizeof(struct ei_device), 0);
-
- /* Grab the region so we can find another board if something fails. */
- request_region(ioaddr, HP_IO_EXTENT,"hp");
-
- printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
-
- for(i = 0; i < ETHER_ADDR_LEN; i++)
- printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
-
- /* Snarf the interrupt now. Someday this could be moved to open(). */
- 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 = wordmode ? irq_16list : irq_8list;
- do {
- int irq = *irqp;
- if (request_irq (irq, NULL, 0, "bogus") != -EBUSY) {
- autoirq_setup(0);
- /* Twinkle the interrupt, and check if it's seen. */
- outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
- outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
- if (irq == autoirq_report(0) /* It's a good IRQ line! */
- && request_irq (irq, &ei_interrupt, 0, "hp") == 0) {
- printk(" selecting IRQ %d.\n", irq);
- dev->irq = *irqp;
- break;
- }
- }
- } while (*++irqp);
- if (*irqp == 0) {
- printk(" no free IRQ lines.\n");
- return EBUSY;
- }
- } else {
- if (dev->irq == 2)
- dev->irq = 9;
- if (request_irq(dev->irq, ei_interrupt, 0, "hp")) {
- printk (" unable to get IRQ %d.\n", dev->irq);
- return EBUSY;
- }
- }
-
- if (ei_debug > 1)
- printk(version);
-
- /* Set the base address to point to the NIC, not the "real" base! */
- dev->base_addr = ioaddr + NIC_OFFSET;
-
- ethdev_init(dev);
-
- ei_status.name = name;
- ei_status.word16 = wordmode;
- ei_status.tx_start_page = HP_START_PG;
- ei_status.rx_start_page = HP_START_PG + TX_PAGES;
- ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
-
- 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 0;
- }
-
- 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);
-
- if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
- outb_p(0x00, hp_base + HP_CONFIGURE);
- ei_status.txing = 0;
- /* Pause just a few cycles for the hardware reset to take place. */
- SLOW_DOWN_IO;
- SLOW_DOWN_IO;
-
- outb_p(saved_config, hp_base + HP_CONFIGURE);
- SLOW_DOWN_IO; SLOW_DOWN_IO;
-
- if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
- printk("%s: hp_reset_8390() did not complete.\n", dev->name);
-
- if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
- return;
- }
-
- /* 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) {
- insw(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 {
- insb(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 occurred. */
- 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. */
- outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
- } else {
- outsb(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 -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
- * version-control: t
- * kept-new-versions: 5
- * tab-width: 4
- * c-indent-level: 4
- * End:
- */
-