diff options
Diffstat (limited to 'drivers/net/hp.c')
| -rw-r--r-- | drivers/net/hp.c | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/drivers/net/hp.c b/drivers/net/hp.c new file mode 100644 index 000000000000..026888611d6f --- /dev/null +++ b/drivers/net/hp.c @@ -0,0 +1,464 @@ +/* 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 General Public License, incorporated herein by reference. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + This is a driver for the HP PC-LAN adaptors. + + Sources: + The Crynwr packet driver. +*/ + +static const char version[] = + "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; + + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/init.h> +#include <linux/delay.h> + +#include <asm/system.h> +#include <asm/io.h> + +#include "8390.h" + +#define DRV_NAME "hp" + +/* A zero-terminated list of I/O addresses to be probed. */ +static unsigned int hppclan_portlist[] __initdata = +{ 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. */ + +static int hp_probe1(struct net_device *dev, int ioaddr); + +static int hp_open(struct net_device *dev); +static int hp_close(struct net_device *dev); +static void hp_reset_8390(struct net_device *dev); +static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static void hp_block_input(struct net_device *dev, int count, + struct sk_buff *skb , int ring_offset); +static void hp_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page); + +static void hp_init_card(struct net_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] __initdata= { 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. */ + +static int __init do_hp_probe(struct net_device *dev) +{ + int i; + int base_addr = dev->base_addr; + int irq = dev->irq; + + SET_MODULE_OWNER(dev); + + 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++) { + if (hp_probe1(dev, hppclan_portlist[i]) == 0) + return 0; + dev->irq = irq; + } + + return -ENODEV; +} + +static void cleanup_card(struct net_device *dev) +{ + free_irq(dev->irq, dev); + release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT); +} + +#ifndef MODULE +struct net_device * __init hp_probe(int unit) +{ + struct net_device *dev = alloc_ei_netdev(); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_hp_probe(dev); + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + cleanup_card(dev); +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +static int __init hp_probe1(struct net_device *dev, int ioaddr) +{ + int i, retval, board_id, wordmode; + const char *name; + static unsigned version_printed; + + if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME)) + return -EBUSY; + + /* 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) { + retval = -ENODEV; + goto out; + } + + /* 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 (ei_debug && version_printed++ == 0) + printk(version); + + 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", NULL) != -EBUSY) { + unsigned long cookie = probe_irq_on(); + /* 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 == probe_irq_off(cookie) /* It's a good IRQ line! */ + && request_irq (irq, ei_interrupt, 0, DRV_NAME, dev) == 0) { + printk(" selecting IRQ %d.\n", irq); + dev->irq = *irqp; + break; + } + } + } while (*++irqp); + if (*irqp == 0) { + printk(" no free IRQ lines.\n"); + retval = -EBUSY; + goto out; + } + } else { + if (dev->irq == 2) + dev->irq = 9; + if ((retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev))) { + printk (" unable to get IRQ %d.\n", dev->irq); + goto out; + } + } + + /* Set the base address to point to the NIC, not the "real" base! */ + dev->base_addr = ioaddr + NIC_OFFSET; + dev->open = &hp_open; + dev->stop = &hp_close; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ei_poll; +#endif + + 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.get_8390_hdr = &hp_get_8390_hdr; + ei_status.block_input = &hp_block_input; + ei_status.block_output = &hp_block_output; + hp_init_card(dev); + + return 0; +out: + release_region(ioaddr, HP_IO_EXTENT); + return retval; +} + +static int +hp_open(struct net_device *dev) +{ + ei_open(dev); + return 0; +} + +static int +hp_close(struct net_device *dev) +{ + ei_close(dev); + return 0; +} + +static void +hp_reset_8390(struct net_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. */ + udelay(5); + + outb_p(saved_config, hp_base + HP_CONFIGURE); + udelay(5); + + 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; +} + +static void +hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_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); + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base); + outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO); + outb_p(0, nic_base + EN0_RCNTHI); + outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ + outb_p(ring_page, nic_base + EN0_RSARHI); + outb_p(E8390_RREAD+E8390_START, nic_base); + + if (ei_status.word16) + insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1); + else + insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)); + + outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE); +} + +/* Block input and output, similar to the Crynwr packet driver. If you are + 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 void +hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + int nic_base = dev->base_addr; + int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE); + int xfer_count = count; + char *buf = skb->data; + + 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); +} + +static void +hp_block_output(struct net_device *dev, int count, + const unsigned char *buf, int 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 NE8390_RW_BUGFIX + /* 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); +#define NE_CMD 0x00 + outb_p(E8390_RREAD+E8390_START, nic_base + NE_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 net_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; +} + +#ifdef MODULE +#define MAX_HP_CARDS 4 /* Max number of HP cards per module */ +static struct net_device *dev_hp[MAX_HP_CARDS]; +static int io[MAX_HP_CARDS]; +static int irq[MAX_HP_CARDS]; + +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); +MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver"); +MODULE_LICENSE("GPL"); + +/* This is set up so that only a single autoprobe takes place per call. +ISA device autoprobes on a running machine are not recommended. */ +int +init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) { + if (io[this_dev] == 0) { + if (this_dev != 0) break; /* only autoprobe 1st one */ + printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n"); + } + dev = alloc_ei_netdev(); + if (!dev) + break; + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + if (do_hp_probe(dev) == 0) { + if (register_netdev(dev) == 0) { + dev_hp[found++] = dev; + continue; + } + cleanup_card(dev); + } + free_netdev(dev); + printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]); + break; + } + if (found) + return 0; + return -ENXIO; +} + +void +cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) { + struct net_device *dev = dev_hp[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |