| /* hp.c: A HP LAN ethernet driver for linux. */ |
| /* |
| Written 1993 by Donald Becker. This is alpha test code. |
| 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. |
| |
| 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:v0.99-10 5/28/93 Donald Becker (becker@super.org)\n"; |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/errno.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| |
| #include "dev.h" |
| #include "8390.h" |
| |
| /* These should be in <asm/io.h> 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(ioaddr + 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: |
| */ |