313 lines
10 KiB
C
313 lines
10 KiB
C
/* hp.c: A HP LAN ethernet driver for linux. */
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/*
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Written 1993 by Donald Becker. This is alpha test code.
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This is a extension to the Linux operating system, and is covered by
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same Gnu Public License that covers that work.
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This is a driver for the HP LAN adaptors.
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The Author may be reached as becker@super.org or
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C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
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*/
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static char *version = "hp.c:v0.28 1/28/93 Donald Becker (becker@super.org)\n";
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include "dev.h"
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#include "8390.h"
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/* These should be in <asm/io.h> someday, borrowed from blk_drv/hd.c. */
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#define port_read(port,buf,nr) \
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__asm__("cld;rep;insw"::"d" (port),"D" (buf),"c" (nr):"cx","di")
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#define port_write(port,buf,nr) \
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__asm__("cld;rep;outsw"::"d" (port),"S" (buf),"c" (nr):"cx","si")
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#define port_read_b(port,buf,nr) \
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__asm__("cld;rep;insb"::"d" (port),"D" (buf),"c" (nr):"cx","di")
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#define port_write_b(port,buf,nr) \
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__asm__("cld;rep;outsb"::"d" (port),"S" (buf),"c" (nr):"cx","si")
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#define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
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#define HP_ID 0x07
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#define HP_CONFIGURE 0x08 /* Configuration register. */
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#define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
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#define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
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#define HP_DATAON 0x10 /* Turn on dataport */
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#define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
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#define HP_START_PG 0x00 /* First page of TX buffer */
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#define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
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#define HP_16BSTOP_PG 0xFF /* Last page +1 of RX ring */
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extern void NS8390_init(struct device *dev, int startp);
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extern int ei_debug;
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extern struct sigaction ei_sigaction;
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extern struct ei_device ei_status;
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int hpprobe(int ioaddr, struct device *dev);
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int hpprobe1(int ioaddr, struct device *dev);
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static void hp_reset_8390(struct device *dev);
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static int hp_block_input(struct device *dev, int count,
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char *buf, int ring_offset);
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static void hp_block_output(struct device *dev, int count,
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const unsigned char *buf, const start_page);
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static void hp_init_card(struct device *dev);
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/* Probe for an HP LAN adaptor.
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Also initialize the card and fill in STATION_ADDR with the station
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address. */
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int hpprobe(int ioaddr, struct device *dev)
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{
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int *port, ports[] = {0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
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if (ioaddr > 0x100)
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return hpprobe1(ioaddr, dev);
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for (port = &ports[0]; *port; port++)
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if (inb_p(*port) != 0xff && hpprobe1(*port, dev))
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return dev->base_addr;
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return 0;
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}
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int hpprobe1(int ioaddr, struct device *dev)
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{
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int i;
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unsigned char *station_addr = dev->dev_addr;
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unsigned char SA_prom[6];
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int tmp;
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int hplan;
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printk("HP-LAN ethercard probe at %#3x:", ioaddr);
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tmp = inb_p(ioaddr);
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if (tmp == 0xFF) {
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printk(" not found (nothing there).\n");
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return 0;
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}
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for(i = 0; i < sizeof(SA_prom); i++) {
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SA_prom[i] = inb(ioaddr + i);
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if (i < ETHER_ADDR_LEN && station_addr) {
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printk(" %2.2x", SA_prom[i]);
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station_addr[i] = SA_prom[i];
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}
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}
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hplan = (SA_prom[0] == 0x08 && SA_prom[1] == 0x00 && SA_prom[2] == 0x09);
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if (hplan == 0) {
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printk(" not found (invalid station address prefix).\n");
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return 0;
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}
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ei_status.tx_start_page = HP_START_PG;
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ei_status.rx_start_page = HP_START_PG + TX_PAGES;
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/* Set up the rest of the parameters. */
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if ((tmp = inb_p(HP_ID)) & 0x80) {
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ei_status.name = "HP27247";
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ei_status.word16 = 1;
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ei_status.stop_page = HP_16BSTOP_PG; /* Safe for now */
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} else {
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ei_status.name = "HP27250";
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ei_status.word16 = 0;
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ei_status.stop_page = HP_8BSTOP_PG; /* Safe for now */
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}
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/* Set the base address to point to the NIC! */
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dev->base_addr = ioaddr + NIC_OFFSET;
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if (dev->irq == 2)
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dev->irq = 9;
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/* Snarf the interrupt now. There's no point in waiting since we cannot
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share and the board will usually be enabled. */
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if (dev->irq < 2) {
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int *irq, irq_list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
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for (irq = irq_list; *irq; irq++) {
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if (irqaction(*irq, &ei_sigaction) == 0)
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break;
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}
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if (*irq == 0) {
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printk (" unable to get an IRQ.\n");
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return 0;
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}
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dev->irq = *irq;
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}
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printk(" %s found, using IRQ %d.\n", ei_status.name, dev->irq);
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if (ei_debug > 1)
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printk(version);
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ei_status.reset_8390 = &hp_reset_8390;
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ei_status.block_input = &hp_block_input;
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ei_status.block_output = &hp_block_output;
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hp_init_card(dev);
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return dev->base_addr;
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}
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static void
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hp_reset_8390(struct device *dev)
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{
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int hp_base = dev->base_addr - NIC_OFFSET;
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int saved_config = inb_p(hp_base + HP_CONFIGURE);
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int reset_start_time = jiffies;
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if (ei_debug > 1) printk("resetting the 8390 time=%d...", jiffies);
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outb_p(0x00, hp_base + HP_CONFIGURE);
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ei_status.txing = 0;
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sti();
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/* We shouldn't use the boguscount for timing, but this hasn't been
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checked yet, and you could hang your machine if jiffies break... */
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{
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int boguscount = 150000;
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while(jiffies - reset_start_time < 2)
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if (boguscount-- < 0) {
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printk("jiffy failure (t=%d)...", jiffies);
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break;
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}
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}
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outb_p(saved_config, hp_base + HP_CONFIGURE);
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while ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
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if (jiffies - reset_start_time > 2) {
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printk(EI_NAME": hp_reset_8390() did not complete.\n");
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return;
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}
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if (ei_debug > 1) printk("8390 reset done.", jiffies);
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}
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/* Block input and output, similar to the Crynwr packet driver. If you
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porting to a new ethercard look at the packet driver source for hints.
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The HP LAN doesn't use shared memory -- we put the packet
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out through the "remote DMA" dataport. */
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static int
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hp_block_input(struct device *dev, int count, char *buf, int ring_offset)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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int xfer_count = count;
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
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outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, nic_base);
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if (ei_status.word16) {
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port_read(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
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if (count & 0x01)
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buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
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} else {
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/* Input the bytes with a slow 8-bit loop. Someday change this to:
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port_read_b(nic_base - NIC_OFFSET + HP_DATA_PORT,buf, count); */
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int i;
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for(i = 0; i < count; i++) {
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buf[i] = inb_p(nic_base - NIC_OFFSET + HP_DATAPORT);
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}
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}
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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/* Check only the lower 8 bits so we can ignore ring wrap. */
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if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
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printk(EI_NAME": RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
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ring_offset + xfer_count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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return ring_offset + count;
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}
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static void
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hp_block_output(struct device *dev, int count,
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const unsigned char *buf, const start_page)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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int i;
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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/* Round the count up for word writes. Do we need to do this?
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What effect will an odd byte count have on the 8390?
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I should check someday. */
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if (ei_status.word16 && (count & 0x01))
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count++;
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/* We should already be in page 0, but to be safe... */
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outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
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#ifdef notdef
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/* Handle the read-before-write bug the same way as the
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Crynwr packet driver -- the NatSemi method doesn't work. */
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outb_p(0x42, nic_base + EN0_RCNTLO);
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outb_p(0, nic_base + EN0_RCNTHI);
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outb_p(0xff, nic_base + EN0_RSARLO);
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outb_p(0x00, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, EN_CMD);
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/* Make certain that the dummy read has occured. */
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inb_p(0x61);
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inb_p(0x61);
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#endif
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(0x00, nic_base + EN0_RSARLO);
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outb_p(start_page, nic_base + EN0_RSARHI);
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outb_p(E8390_RWRITE+E8390_START, nic_base);
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if (ei_status.word16) {
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/* Use the 'rep' sequence for 16 bit boards. */
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port_write(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
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} else {
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/* Output the bytes with a slow 8-bit loop. This actually is almost
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as fast as possible, but it does tie up the processor. We could
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also use a 'rep' sequnce here. */
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for(i = 0; i < count; i++)
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outb_p(buf[i], nic_base - NIC_OFFSET + HP_DATAPORT);
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}
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/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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if ((start_page << 8) + count != addr)
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printk(EI_NAME": TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
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(start_page << 8) + count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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return;
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}
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/* This function resets the ethercard if something screws up. */
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static void
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hp_init_card(struct device *dev)
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{
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int irq = dev->irq;
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/* default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
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static char irqval[16] = { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
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NS8390_init(dev, 0);
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outb_p(irqval[irq&0x0f] | HP_RUN,
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dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
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return;
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}
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/*
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* Local variables:
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* compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c hp.c"
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* version-control: t
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* kept-new-versions: 5
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* End:
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*/
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