diff options
Diffstat (limited to 'drivers/net/ethernet/8390/3c503.c')
| -rw-r--r-- | drivers/net/ethernet/8390/3c503.c | 778 |
1 files changed, 778 insertions, 0 deletions
diff --git a/drivers/net/ethernet/8390/3c503.c b/drivers/net/ethernet/8390/3c503.c new file mode 100644 index 000000000000..fbab1367505f --- /dev/null +++ b/drivers/net/ethernet/8390/3c503.c @@ -0,0 +1,778 @@ +/* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */ +/* + Written 1992-94 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 driver should work with the 3c503 and 3c503/16. It should be used + in shared memory mode for best performance, although it may also work + in programmed-I/O mode. + + Sources: + EtherLink II Technical Reference Manual, + EtherLink II/16 Technical Reference Manual Supplement, + 3Com Corporation, 5400 Bayfront Plaza, Santa Clara CA 95052-8145 + + The Crynwr 3c503 packet driver. + + Changelog: + + Paul Gortmaker : add support for the 2nd 8kB of RAM on 16 bit cards. + Paul Gortmaker : multiple card support for module users. + rjohnson@analogic.com : Fix up PIO interface for efficient operation. + Jeff Garzik : ethtool support + +*/ + +#define DRV_NAME "3c503" +#define DRV_VERSION "1.10a" +#define DRV_RELDATE "11/17/2001" + + +static const char version[] = + DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n"; + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/ethtool.h> + +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/byteorder.h> + +#include "8390.h" +#include "3c503.h" +#define WRD_COUNT 4 + +static int el2_pio_probe(struct net_device *dev); +static int el2_probe1(struct net_device *dev, int ioaddr); + +/* A zero-terminated list of I/O addresses to be probed in PIO mode. */ +static unsigned int netcard_portlist[] __initdata = + { 0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0}; + +#define EL2_IO_EXTENT 16 + +static int el2_open(struct net_device *dev); +static int el2_close(struct net_device *dev); +static void el2_reset_8390(struct net_device *dev); +static void el2_init_card(struct net_device *dev); +static void el2_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page); +static void el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, + int ring_offset); +static void el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static const struct ethtool_ops netdev_ethtool_ops; + + +/* This routine probes for a memory-mapped 3c503 board by looking for + the "location register" at the end of the jumpered boot PROM space. + This works even if a PROM isn't there. + + If the ethercard isn't found there is an optional probe for + ethercard jumpered to programmed-I/O mode. + */ +static int __init do_el2_probe(struct net_device *dev) +{ + int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0}; + int base_addr = dev->base_addr; + int irq = dev->irq; + + if (base_addr > 0x1ff) /* Check a single specified location. */ + return el2_probe1(dev, base_addr); + else if (base_addr != 0) /* Don't probe at all. */ + return -ENXIO; + + for (addr = addrs; *addr; addr++) { + void __iomem *p = ioremap(*addr, 1); + unsigned base_bits; + int i; + + if (!p) + continue; + base_bits = readb(p); + iounmap(p); + i = ffs(base_bits) - 1; + if (i == -1 || base_bits != (1 << i)) + continue; + if (el2_probe1(dev, netcard_portlist[i]) == 0) + return 0; + dev->irq = irq; + } +#if ! defined(no_probe_nonshared_memory) + return el2_pio_probe(dev); +#else + return -ENODEV; +#endif +} + +/* Try all of the locations that aren't obviously empty. This touches + a lot of locations, and is much riskier than the code above. */ +static int __init +el2_pio_probe(struct net_device *dev) +{ + int i; + int base_addr = dev->base_addr; + int irq = dev->irq; + + if (base_addr > 0x1ff) /* Check a single specified location. */ + return el2_probe1(dev, base_addr); + else if (base_addr != 0) /* Don't probe at all. */ + return -ENXIO; + + for (i = 0; netcard_portlist[i]; i++) { + if (el2_probe1(dev, netcard_portlist[i]) == 0) + return 0; + dev->irq = irq; + } + + return -ENODEV; +} + +#ifndef MODULE +struct net_device * __init el2_probe(int unit) +{ + struct net_device *dev = alloc_eip_netdev(); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_el2_probe(dev); + if (err) + goto out; + return dev; +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +static const struct net_device_ops el2_netdev_ops = { + .ndo_open = el2_open, + .ndo_stop = el2_close, + + .ndo_start_xmit = eip_start_xmit, + .ndo_tx_timeout = eip_tx_timeout, + .ndo_get_stats = eip_get_stats, + .ndo_set_rx_mode = eip_set_multicast_list, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_change_mtu = eth_change_mtu, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = eip_poll, +#endif +}; + +/* Probe for the Etherlink II card at I/O port base IOADDR, + returning non-zero on success. If found, set the station + address and memory parameters in DEVICE. */ +static int __init +el2_probe1(struct net_device *dev, int ioaddr) +{ + int i, iobase_reg, membase_reg, saved_406, wordlength, retval; + static unsigned version_printed; + unsigned long vendor_id; + + if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME)) + return -EBUSY; + + if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) { + retval = -EBUSY; + goto out; + } + + /* Reset and/or avoid any lurking NE2000 */ + if (inb(ioaddr + 0x408) == 0xff) { + mdelay(1); + retval = -ENODEV; + goto out1; + } + + /* We verify that it's a 3C503 board by checking the first three octets + of its ethernet address. */ + iobase_reg = inb(ioaddr+0x403); + membase_reg = inb(ioaddr+0x404); + /* ASIC location registers should be 0 or have only a single bit set. */ + if ((iobase_reg & (iobase_reg - 1)) || + (membase_reg & (membase_reg - 1))) { + retval = -ENODEV; + goto out1; + } + saved_406 = inb_p(ioaddr + 0x406); + outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */ + outb_p(ECNTRL_THIN, ioaddr + 0x406); + /* Map the station addr PROM into the lower I/O ports. We now check + for both the old and new 3Com prefix */ + outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406); + vendor_id = inb(ioaddr)*0x10000 + inb(ioaddr + 1)*0x100 + inb(ioaddr + 2); + if ((vendor_id != OLD_3COM_ID) && (vendor_id != NEW_3COM_ID)) { + /* Restore the register we frobbed. */ + outb(saved_406, ioaddr + 0x406); + retval = -ENODEV; + goto out1; + } + + if (ei_debug && version_printed++ == 0) + pr_debug("%s", version); + + dev->base_addr = ioaddr; + + pr_info("%s: 3c503 at i/o base %#3x, node ", dev->name, ioaddr); + + /* Retrieve and print the ethernet address. */ + for (i = 0; i < 6; i++) + dev->dev_addr[i] = inb(ioaddr + i); + pr_cont("%pM", dev->dev_addr); + + /* Map the 8390 back into the window. */ + outb(ECNTRL_THIN, ioaddr + 0x406); + + /* Check for EL2/16 as described in tech. man. */ + outb_p(E8390_PAGE0, ioaddr + E8390_CMD); + outb_p(0, ioaddr + EN0_DCFG); + outb_p(E8390_PAGE2, ioaddr + E8390_CMD); + wordlength = inb_p(ioaddr + EN0_DCFG) & ENDCFG_WTS; + outb_p(E8390_PAGE0, ioaddr + E8390_CMD); + + /* Probe for, turn on and clear the board's shared memory. */ + if (ei_debug > 2) + pr_cont(" memory jumpers %2.2x ", membase_reg); + outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */ + + /* This should be probed for (or set via an ioctl()) at run-time. + Right now we use a sleazy hack to pass in the interface number + at boot-time via the low bits of the mem_end field. That value is + unused, and the low bits would be discarded even if it was used. */ +#if defined(EI8390_THICK) || defined(EL2_AUI) + ei_status.interface_num = 1; +#else + ei_status.interface_num = dev->mem_end & 0xf; +#endif + pr_cont(", using %sternal xcvr.\n", ei_status.interface_num == 0 ? "in" : "ex"); + + if ((membase_reg & 0xf0) == 0) { + dev->mem_start = 0; + ei_status.name = "3c503-PIO"; + ei_status.mem = NULL; + } else { + dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) + + ((membase_reg & 0xA0) ? 0x4000 : 0); +#define EL2_MEMSIZE (EL2_MB1_STOP_PG - EL2_MB1_START_PG)*256 + ei_status.mem = ioremap(dev->mem_start, EL2_MEMSIZE); + +#ifdef EL2MEMTEST + /* This has never found an error, but someone might care. + Note that it only tests the 2nd 8kB on 16kB 3c503/16 + cards between card addr. 0x2000 and 0x3fff. */ + { /* Check the card's memory. */ + void __iomem *mem_base = ei_status.mem; + unsigned int test_val = 0xbbadf00d; + writel(0xba5eba5e, mem_base); + for (i = sizeof(test_val); i < EL2_MEMSIZE; i+=sizeof(test_val)) { + writel(test_val, mem_base + i); + if (readl(mem_base) != 0xba5eba5e || + readl(mem_base + i) != test_val) { + pr_warning("3c503: memory failure or memory address conflict.\n"); + dev->mem_start = 0; + ei_status.name = "3c503-PIO"; + iounmap(mem_base); + ei_status.mem = NULL; + break; + } + test_val += 0x55555555; + writel(0, mem_base + i); + } + } +#endif /* EL2MEMTEST */ + + if (dev->mem_start) + dev->mem_end = dev->mem_start + EL2_MEMSIZE; + + if (wordlength) { /* No Tx pages to skip over to get to Rx */ + ei_status.priv = 0; + ei_status.name = "3c503/16"; + } else { + ei_status.priv = TX_PAGES * 256; + ei_status.name = "3c503"; + } + } + + /* + Divide up the memory on the card. This is the same regardless of + whether shared-mem or PIO is used. For 16 bit cards (16kB RAM), + we use the entire 8k of bank1 for an Rx ring. We only use 3k + of the bank0 for 2 full size Tx packet slots. For 8 bit cards, + (8kB RAM) we use 3kB of bank1 for two Tx slots, and the remaining + 5kB for an Rx ring. */ + + if (wordlength) { + ei_status.tx_start_page = EL2_MB0_START_PG; + ei_status.rx_start_page = EL2_MB1_START_PG; + } else { + ei_status.tx_start_page = EL2_MB1_START_PG; + ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; + } + + /* Finish setting the board's parameters. */ + ei_status.stop_page = EL2_MB1_STOP_PG; + ei_status.word16 = wordlength; + ei_status.reset_8390 = el2_reset_8390; + ei_status.get_8390_hdr = el2_get_8390_hdr; + ei_status.block_input = el2_block_input; + ei_status.block_output = el2_block_output; + + if (dev->irq == 2) + dev->irq = 9; + else if (dev->irq > 5 && dev->irq != 9) { + pr_warning("3c503: configured interrupt %d invalid, will use autoIRQ.\n", + dev->irq); + dev->irq = 0; + } + + ei_status.saved_irq = dev->irq; + + dev->netdev_ops = &el2_netdev_ops; + dev->ethtool_ops = &netdev_ethtool_ops; + + retval = register_netdev(dev); + if (retval) + goto out1; + + if (dev->mem_start) + pr_info("%s: %s - %dkB RAM, 8kB shared mem window at %#6lx-%#6lx.\n", + dev->name, ei_status.name, (wordlength+1)<<3, + dev->mem_start, dev->mem_end-1); + + else + { + ei_status.tx_start_page = EL2_MB1_START_PG; + ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; + pr_info("%s: %s, %dkB RAM, using programmed I/O (REJUMPER for SHARED MEMORY).\n", + dev->name, ei_status.name, (wordlength+1)<<3); + } + release_region(ioaddr + 0x400, 8); + return 0; +out1: + release_region(ioaddr + 0x400, 8); +out: + release_region(ioaddr, EL2_IO_EXTENT); + return retval; +} + +static irqreturn_t el2_probe_interrupt(int irq, void *seen) +{ + *(bool *)seen = true; + return IRQ_HANDLED; +} + +static int +el2_open(struct net_device *dev) +{ + int retval; + + if (dev->irq < 2) { + static const int irqlist[] = {5, 9, 3, 4, 0}; + const int *irqp = irqlist; + + outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */ + do { + bool seen; + + retval = request_irq(*irqp, el2_probe_interrupt, 0, + dev->name, &seen); + if (retval == -EBUSY) + continue; + if (retval < 0) + goto err_disable; + + /* Twinkle the interrupt, and check if it's seen. */ + seen = false; + smp_wmb(); + outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR); + outb_p(0x00, E33G_IDCFR); + msleep(1); + free_irq(*irqp, &seen); + if (!seen) + continue; + + retval = request_irq(dev->irq = *irqp, eip_interrupt, 0, + dev->name, dev); + if (retval == -EBUSY) + continue; + if (retval < 0) + goto err_disable; + break; + } while (*++irqp); + + if (*irqp == 0) { + err_disable: + outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ + return -EAGAIN; + } + } else { + if ((retval = request_irq(dev->irq, eip_interrupt, 0, dev->name, dev))) { + return retval; + } + } + + el2_init_card(dev); + eip_open(dev); + return 0; +} + +static int +el2_close(struct net_device *dev) +{ + free_irq(dev->irq, dev); + dev->irq = ei_status.saved_irq; + outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ + + eip_close(dev); + return 0; +} + +/* This is called whenever we have a unrecoverable failure: + transmit timeout + Bad ring buffer packet header + */ +static void +el2_reset_8390(struct net_device *dev) +{ + if (ei_debug > 1) { + pr_debug("%s: Resetting the 3c503 board...", dev->name); + pr_cont(" %#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR), + E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR)); + } + outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL); + ei_status.txing = 0; + outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); + el2_init_card(dev); + if (ei_debug > 1) + pr_cont("done\n"); +} + +/* Initialize the 3c503 GA registers after a reset. */ +static void +el2_init_card(struct net_device *dev) +{ + /* Unmap the station PROM and select the DIX or BNC connector. */ + outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); + + /* Set ASIC copy of rx's first and last+1 buffer pages */ + /* These must be the same as in the 8390. */ + outb(ei_status.rx_start_page, E33G_STARTPG); + outb(ei_status.stop_page, E33G_STOPPG); + + /* Point the vector pointer registers somewhere ?harmless?. */ + outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */ + outb(0xff, E33G_VP1); + outb(0x00, E33G_VP0); + /* Turn off all interrupts until we're opened. */ + outb_p(0x00, dev->base_addr + EN0_IMR); + /* Enable IRQs iff started. */ + outb(EGACFR_NORM, E33G_GACFR); + + /* Set the interrupt line. */ + outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR); + outb_p((WRD_COUNT << 1), E33G_DRQCNT); /* Set burst size to 8 */ + outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */ + outb_p(0x00, E33G_DMAAL); + return; /* We always succeed */ +} + +/* + * Either use the shared memory (if enabled on the board) or put the packet + * out through the ASIC FIFO. + */ +static void +el2_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page) +{ + unsigned short int *wrd; + int boguscount; /* timeout counter */ + unsigned short word; /* temporary for better machine code */ + void __iomem *base = ei_status.mem; + + if (ei_status.word16) /* Tx packets go into bank 0 on EL2/16 card */ + outb(EGACFR_RSEL|EGACFR_TCM, E33G_GACFR); + else + outb(EGACFR_NORM, E33G_GACFR); + + if (base) { /* Shared memory transfer */ + memcpy_toio(base + ((start_page - ei_status.tx_start_page) << 8), + buf, count); + outb(EGACFR_NORM, E33G_GACFR); /* Back to bank1 in case on bank0 */ + return; + } + +/* + * No shared memory, put the packet out the other way. + * Set up then start the internal memory transfer to Tx Start Page + */ + + word = (unsigned short)start_page; + outb(word&0xFF, E33G_DMAAH); + outb(word>>8, E33G_DMAAL); + + outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT + | ECNTRL_START, E33G_CNTRL); + +/* + * Here I am going to write data to the FIFO as quickly as possible. + * Note that E33G_FIFOH is defined incorrectly. It is really + * E33G_FIFOL, the lowest port address for both the byte and + * word write. Variable 'count' is NOT checked. Caller must supply a + * valid count. Note that I may write a harmless extra byte to the + * 8390 if the byte-count was not even. + */ + wrd = (unsigned short int *) buf; + count = (count + 1) >> 1; + for(;;) + { + boguscount = 0x1000; + while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) + { + if(!boguscount--) + { + pr_notice("%s: FIFO blocked in el2_block_output.\n", dev->name); + el2_reset_8390(dev); + goto blocked; + } + } + if(count > WRD_COUNT) + { + outsw(E33G_FIFOH, wrd, WRD_COUNT); + wrd += WRD_COUNT; + count -= WRD_COUNT; + } + else + { + outsw(E33G_FIFOH, wrd, count); + break; + } + } + blocked:; + outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); +} + +/* Read the 4 byte, page aligned 8390 specific header. */ +static void +el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + int boguscount; + void __iomem *base = ei_status.mem; + unsigned short word; + + if (base) { /* Use the shared memory. */ + void __iomem *hdr_start = base + ((ring_page - EL2_MB1_START_PG)<<8); + memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); + hdr->count = le16_to_cpu(hdr->count); + return; + } + +/* + * No shared memory, use programmed I/O. + */ + + word = (unsigned short)ring_page; + outb(word&0xFF, E33G_DMAAH); + outb(word>>8, E33G_DMAAL); + + outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT + | ECNTRL_START, E33G_CNTRL); + boguscount = 0x1000; + while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) + { + if(!boguscount--) + { + pr_notice("%s: FIFO blocked in el2_get_8390_hdr.\n", dev->name); + memset(hdr, 0x00, sizeof(struct e8390_pkt_hdr)); + el2_reset_8390(dev); + goto blocked; + } + } + insw(E33G_FIFOH, hdr, (sizeof(struct e8390_pkt_hdr))>> 1); + blocked:; + outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); +} + + +static void +el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + int boguscount = 0; + void __iomem *base = ei_status.mem; + unsigned short int *buf; + unsigned short word; + + /* Maybe enable shared memory just be to be safe... nahh.*/ + if (base) { /* Use the shared memory. */ + ring_offset -= (EL2_MB1_START_PG<<8); + if (ring_offset + count > EL2_MEMSIZE) { + /* We must wrap the input move. */ + int semi_count = EL2_MEMSIZE - ring_offset; + memcpy_fromio(skb->data, base + ring_offset, semi_count); + count -= semi_count; + memcpy_fromio(skb->data + semi_count, base + ei_status.priv, count); + } else { + memcpy_fromio(skb->data, base + ring_offset, count); + } + return; + } + +/* + * No shared memory, use programmed I/O. + */ + word = (unsigned short) ring_offset; + outb(word>>8, E33G_DMAAH); + outb(word&0xFF, E33G_DMAAL); + + outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT + | ECNTRL_START, E33G_CNTRL); + +/* + * Here I also try to get data as fast as possible. I am betting that I + * can read one extra byte without clobbering anything in the kernel because + * this would only occur on an odd byte-count and allocation of skb->data + * is word-aligned. Variable 'count' is NOT checked. Caller must check + * for a valid count. + * [This is currently quite safe.... but if one day the 3c503 explodes + * you know where to come looking ;)] + */ + + buf = (unsigned short int *) skb->data; + count = (count + 1) >> 1; + for(;;) + { + boguscount = 0x1000; + while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) + { + if(!boguscount--) + { + pr_notice("%s: FIFO blocked in el2_block_input.\n", dev->name); + el2_reset_8390(dev); + goto blocked; + } + } + if(count > WRD_COUNT) + { + insw(E33G_FIFOH, buf, WRD_COUNT); + buf += WRD_COUNT; + count -= WRD_COUNT; + } + else + { + insw(E33G_FIFOH, buf, count); + break; + } + } + blocked:; + outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); +} + + +static void netdev_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, +}; + +#ifdef MODULE +#define MAX_EL2_CARDS 4 /* Max number of EL2 cards per module */ + +static struct net_device *dev_el2[MAX_EL2_CARDS]; +static int io[MAX_EL2_CARDS]; +static int irq[MAX_EL2_CARDS]; +static int xcvr[MAX_EL2_CARDS]; /* choose int. or ext. xcvr */ +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(xcvr, int, NULL, 0); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); +MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)"); +MODULE_DESCRIPTION("3Com ISA EtherLink II, II/16 (3c503, 3c503/16) 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 +init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { + if (io[this_dev] == 0) { + if (this_dev != 0) break; /* only autoprobe 1st one */ + pr_notice("3c503.c: Presently autoprobing (not recommended) for a single card.\n"); + } + dev = alloc_eip_netdev(); + if (!dev) + break; + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */ + if (do_el2_probe(dev) == 0) { + dev_el2[found++] = dev; + continue; + } + free_netdev(dev); + pr_warning("3c503.c: No 3c503 card found (i/o = 0x%x).\n", io[this_dev]); + break; + } + if (found) + return 0; + return -ENXIO; +} + +static void cleanup_card(struct net_device *dev) +{ + /* NB: el2_close() handles free_irq */ + release_region(dev->base_addr, EL2_IO_EXTENT); + if (ei_status.mem) + iounmap(ei_status.mem); +} + +void __exit +cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { + struct net_device *dev = dev_el2[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |