diff options
Diffstat (limited to 'drivers/net/smc-ultra.c')
| -rw-r--r-- | drivers/net/smc-ultra.c | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/drivers/net/smc-ultra.c b/drivers/net/smc-ultra.c new file mode 100644 index 000000000000..b564c677c6d2 --- /dev/null +++ b/drivers/net/smc-ultra.c @@ -0,0 +1,615 @@ +/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */ +/* + This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards. + + Written 1993-1998 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 driver uses the cards in the 8390-compatible mode. + Most of the run-time complexity is handled by the generic code in + 8390.c. The code in this file is responsible for + + ultra_probe() Detecting and initializing the card. + ultra_probe1() + ultra_probe_isapnp() + + ultra_open() The card-specific details of starting, stopping + ultra_reset_8390() and resetting the 8390 NIC core. + ultra_close() + + ultra_block_input() Routines for reading and writing blocks of + ultra_block_output() packet buffer memory. + ultra_pio_input() + ultra_pio_output() + + This driver enables the shared memory only when doing the actual data + transfers to avoid a bug in early version of the card that corrupted + data transferred by a AHA1542. + + This driver now supports the programmed-I/O (PIO) data transfer mode of + the EtherEZ. It does not use the non-8390-compatible "Altego" mode. + That support (if available) is in smc-ez.c. + + Changelog: + + Paul Gortmaker : multiple card support for module users. + Donald Becker : 4/17/96 PIO support, minor potential problems avoided. + Donald Becker : 6/6/96 correctly set auto-wrap bit. + Alexander Sotirov : 1/20/01 Added support for ISAPnP cards + + Note about the ISA PnP support: + + This driver can not autoprobe for more than one SMC EtherEZ PnP card. + You have to configure the second card manually through the /proc/isapnp + interface and then load the module with an explicit io=0x___ option. +*/ + +static const char version[] = + "smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/isapnp.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include <asm/io.h> +#include <asm/system.h> + +#include "8390.h" + +#define DRV_NAME "smc-ultra" + +/* A zero-terminated list of I/O addresses to be probed. */ +static unsigned int ultra_portlist[] __initdata = +{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0}; + +static int ultra_probe1(struct net_device *dev, int ioaddr); + +#ifdef __ISAPNP__ +static int ultra_probe_isapnp(struct net_device *dev); +#endif + +static int ultra_open(struct net_device *dev); +static void ultra_reset_8390(struct net_device *dev); +static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static void ultra_block_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset); +static void ultra_block_output(struct net_device *dev, int count, + const unsigned char *buf, const int start_page); +static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static void ultra_pio_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset); +static void ultra_pio_output(struct net_device *dev, int count, + const unsigned char *buf, const int start_page); +static int ultra_close_card(struct net_device *dev); + +#ifdef __ISAPNP__ +static struct isapnp_device_id ultra_device_ids[] __initdata = { + { ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416), + ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416), + (long) "SMC EtherEZ (8416)" }, + { } /* terminate list */ +}; + +MODULE_DEVICE_TABLE(isapnp, ultra_device_ids); +#endif + + +#define START_PG 0x00 /* First page of TX buffer */ + +#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */ +#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */ +#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */ +#define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */ +#define IOPA 0x07 /* I/O Pipe Address for PIO operation. */ +#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */ +#define ULTRA_IO_EXTENT 32 +#define EN0_ERWCNT 0x08 /* Early receive warning count. */ + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void ultra_poll(struct net_device *dev) +{ + disable_irq(dev->irq); + ei_interrupt(dev->irq, dev, NULL); + enable_irq(dev->irq); +} +#endif +/* Probe for the Ultra. This looks like a 8013 with the station + address PROM at I/O ports <base>+8 to <base>+13, with a checksum + following. +*/ + +static int __init do_ultra_probe(struct net_device *dev) +{ + int i; + int base_addr = dev->base_addr; + int irq = dev->irq; + + SET_MODULE_OWNER(dev); + +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = &ultra_poll; +#endif + if (base_addr > 0x1ff) /* Check a single specified location. */ + return ultra_probe1(dev, base_addr); + else if (base_addr != 0) /* Don't probe at all. */ + return -ENXIO; + +#ifdef __ISAPNP__ + /* Look for any installed ISAPnP cards */ + if (isapnp_present() && (ultra_probe_isapnp(dev) == 0)) + return 0; +#endif + + for (i = 0; ultra_portlist[i]; i++) { + dev->irq = irq; + if (ultra_probe1(dev, ultra_portlist[i]) == 0) + return 0; + } + + return -ENODEV; +} + +static void cleanup_card(struct net_device *dev) +{ + /* NB: ultra_close_card() does free_irq */ +#ifdef __ISAPNP__ + struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv; + if (idev) + pnp_device_detach(idev); +#endif + release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT); + iounmap(ei_status.mem); +} + +#ifndef MODULE +struct net_device * __init ultra_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_ultra_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 ultra_probe1(struct net_device *dev, int ioaddr) +{ + int i, retval; + int checksum = 0; + const char *model_name; + unsigned char eeprom_irq = 0; + static unsigned version_printed; + /* Values from various config regs. */ + unsigned char num_pages, irqreg, addr, piomode; + unsigned char idreg = inb(ioaddr + 7); + unsigned char reg4 = inb(ioaddr + 4) & 0x7f; + + if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) + return -EBUSY; + + /* Check the ID nibble. */ + if ((idreg & 0xF0) != 0x20 /* SMC Ultra */ + && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */ + retval = -ENODEV; + goto out; + } + + /* Select the station address register set. */ + outb(reg4, ioaddr + 4); + + for (i = 0; i < 8; i++) + checksum += inb(ioaddr + 8 + i); + if ((checksum & 0xff) != 0xFF) { + retval = -ENODEV; + goto out; + } + + if (ei_debug && version_printed++ == 0) + printk(version); + + model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ"; + + printk("%s: %s at %#3x,", dev->name, model_name, ioaddr); + + for (i = 0; i < 6; i++) + printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i)); + + /* Switch from the station address to the alternate register set and + read the useful registers there. */ + outb(0x80 | reg4, ioaddr + 4); + + /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */ + outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c); + piomode = inb(ioaddr + 0x8); + addr = inb(ioaddr + 0xb); + irqreg = inb(ioaddr + 0xd); + + /* Switch back to the station address register set so that the MS-DOS driver + can find the card after a warm boot. */ + outb(reg4, ioaddr + 4); + + if (dev->irq < 2) { + unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15}; + int irq; + + /* The IRQ bits are split. */ + irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)]; + + if (irq == 0) { + printk(", failed to detect IRQ line.\n"); + retval = -EAGAIN; + goto out; + } + dev->irq = irq; + eeprom_irq = 1; + } + + /* The 8390 isn't at the base address, so fake the offset */ + dev->base_addr = ioaddr+ULTRA_NIC_OFFSET; + + { + int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000}; + short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff}; + + dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ; + num_pages = num_pages_tbl[(addr >> 4) & 3]; + } + + ei_status.name = model_name; + ei_status.word16 = 1; + ei_status.tx_start_page = START_PG; + ei_status.rx_start_page = START_PG + TX_PAGES; + ei_status.stop_page = num_pages; + + ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256); + if (!ei_status.mem) { + printk(", failed to ioremap.\n"); + retval = -ENOMEM; + goto out; + } + + dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256; + + if (piomode) { + printk(",%s IRQ %d programmed-I/O mode.\n", + eeprom_irq ? "EEPROM" : "assigned ", dev->irq); + ei_status.block_input = &ultra_pio_input; + ei_status.block_output = &ultra_pio_output; + ei_status.get_8390_hdr = &ultra_pio_get_hdr; + } else { + printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ", + dev->irq, dev->mem_start, dev->mem_end-1); + ei_status.block_input = &ultra_block_input; + ei_status.block_output = &ultra_block_output; + ei_status.get_8390_hdr = &ultra_get_8390_hdr; + } + ei_status.reset_8390 = &ultra_reset_8390; + dev->open = &ultra_open; + dev->stop = &ultra_close_card; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ei_poll; +#endif + NS8390_init(dev, 0); + + return 0; +out: + release_region(ioaddr, ULTRA_IO_EXTENT); + return retval; +} + +#ifdef __ISAPNP__ +static int __init ultra_probe_isapnp(struct net_device *dev) +{ + int i; + + for (i = 0; ultra_device_ids[i].vendor != 0; i++) { + struct pnp_dev *idev = NULL; + + while ((idev = pnp_find_dev(NULL, + ultra_device_ids[i].vendor, + ultra_device_ids[i].function, + idev))) { + /* Avoid already found cards from previous calls */ + if (pnp_device_attach(idev) < 0) + continue; + if (pnp_activate_dev(idev) < 0) { + __again: + pnp_device_detach(idev); + continue; + } + /* if no io and irq, search for next */ + if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) + goto __again; + /* found it */ + dev->base_addr = pnp_port_start(idev, 0); + dev->irq = pnp_irq(idev, 0); + printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n", + (char *) ultra_device_ids[i].driver_data, + dev->base_addr, dev->irq); + if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */ + printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr); + pnp_device_detach(idev); + return -ENXIO; + } + ei_status.priv = (unsigned long)idev; + break; + } + if (!idev) + continue; + return 0; + } + + return -ENODEV; +} +#endif + +static int +ultra_open(struct net_device *dev) +{ + int retval; + int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */ + unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40, + 0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, }; + + retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev); + if (retval) + return retval; + + outb(0x00, ioaddr); /* Disable shared memory for safety. */ + outb(0x80, ioaddr + 5); + /* Set the IRQ line. */ + outb(inb(ioaddr + 4) | 0x80, ioaddr + 4); + outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13); + outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4); + + if (ei_status.block_input == &ultra_pio_input) { + outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */ + outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */ + } else + outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */ + /* Set the early receive warning level in window 0 high enough not + to receive ERW interrupts. */ + outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr); + outb(0xff, dev->base_addr + EN0_ERWCNT); + ei_open(dev); + return 0; +} + +static void +ultra_reset_8390(struct net_device *dev) +{ + int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */ + + outb(ULTRA_RESET, cmd_port); + if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies); + ei_status.txing = 0; + + outb(0x00, cmd_port); /* Disable shared memory for safety. */ + outb(0x80, cmd_port + 5); + if (ei_status.block_input == &ultra_pio_input) + outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */ + else + outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */ + + if (ei_debug > 1) printk("reset done\n"); + return; +} + +/* Grab the 8390 specific header. Similar to the block_input routine, but + we don't need to be concerned with ring wrap as the header will be at + the start of a page, so we optimize accordingly. */ + +static void +ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8); + + outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */ +#ifdef __BIG_ENDIAN + /* Officially this is what we are doing, but the readl() is faster */ + /* unfortunately it isn't endian aware of the struct */ + memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); + hdr->count = le16_to_cpu(hdr->count); +#else + ((unsigned int*)hdr)[0] = readl(hdr_start); +#endif + outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */ +} + +/* Block input and output are easy on shared memory ethercards, the only + complication is when the ring buffer wraps. */ + +static void +ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8); + + /* Enable shared memory. */ + outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); + + if (ring_offset + count > ei_status.stop_page*256) { + /* We must wrap the input move. */ + int semi_count = ei_status.stop_page*256 - ring_offset; + memcpy_fromio(skb->data, xfer_start, semi_count); + count -= semi_count; + memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count); + } else { + /* Packet is in one chunk -- we can copy + cksum. */ + eth_io_copy_and_sum(skb, xfer_start, count, 0); + } + + outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */ +} + +static void +ultra_block_output(struct net_device *dev, int count, const unsigned char *buf, + int start_page) +{ + void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8); + + /* Enable shared memory. */ + outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); + + memcpy_toio(shmem, buf, count); + + outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */ +} + +/* The identical operations for programmed I/O cards. + The PIO model is trivial to use: the 16 bit start address is written + byte-sequentially to IOPA, with no intervening I/O operations, and the + data is read or written to the IOPD data port. + The only potential complication is that the address register is shared + and must be always be rewritten between each read/write direction change. + This is no problem for us, as the 8390 code ensures that we are single + threaded. */ +static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page) +{ + int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */ + outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */ + outb(ring_page, ioaddr + IOPA); + insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1); +} + +static void ultra_pio_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset) +{ + int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */ + char *buf = skb->data; + + /* For now set the address again, although it should already be correct. */ + outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */ + outb(ring_offset >> 8, ioaddr + IOPA); + /* We know skbuffs are padded to at least word alignment. */ + insw(ioaddr + IOPD, buf, (count+1)>>1); +} + +static void ultra_pio_output(struct net_device *dev, int count, + const unsigned char *buf, const int start_page) +{ + int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */ + outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */ + outb(start_page, ioaddr + IOPA); + /* An extra odd byte is OK here as well. */ + outsw(ioaddr + IOPD, buf, (count+1)>>1); +} + +static int +ultra_close_card(struct net_device *dev) +{ + int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */ + + netif_stop_queue(dev); + + if (ei_debug > 1) + printk("%s: Shutting down ethercard.\n", dev->name); + + outb(0x00, ioaddr + 6); /* Disable interrupts. */ + free_irq(dev->irq, dev); + + NS8390_init(dev, 0); + + /* We should someday disable shared memory and change to 8-bit mode + "just in case"... */ + + return 0; +} + + +#ifdef MODULE +#define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */ +static struct net_device *dev_ultra[MAX_ULTRA_CARDS]; +static int io[MAX_ULTRA_CARDS]; +static int irq[MAX_ULTRA_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("SMC Ultra/EtherEZ ISA/PnP 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_ULTRA_CARDS; this_dev++) { + if (io[this_dev] == 0) { + if (this_dev != 0) break; /* only autoprobe 1st one */ + printk(KERN_NOTICE "smc-ultra.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_ultra_probe(dev) == 0) { + if (register_netdev(dev) == 0) { + dev_ultra[found++] = dev; + continue; + } + cleanup_card(dev); + } + free_netdev(dev); + printk(KERN_WARNING "smc-ultra.c: No SMC Ultra 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_ULTRA_CARDS; this_dev++) { + struct net_device *dev = dev_ultra[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |