/* cops.c: LocalTalk driver for Linux. * * Authors: * - Jay Schulist * * With more than a little help from; * - Alan Cox * * Derived from: * - skeleton.c: A network driver outline for linux. * Written 1993-94 by Donald Becker. * - ltpc.c: A driver for the LocalTalk PC card. * Written by Bradford W. Johnson. * * 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. * * Changes: * 19970608 Alan Cox Allowed dual card type support * Can set board type in insmod * Hooks for cops_setup routine * (not yet implemented). * 19971101 Jay Schulist Fixes for multiple lt* devices. * 19980607 Steven Hirsch Fixed the badly broken support * for Tangent type cards. Only * tested on Daystar LT200. Some * cleanup of formatting and program * logic. Added emacs 'local-vars' * setup for Jay's brace style. */ static const char *version = "cops.c:v0.04 6/7/98 Jay Schulist \n"; /* * Sources: * COPS Localtalk SDK. This provides almost all of the information * needed. */ /* * insmod/modprobe configurable stuff. * - IO Port, choose one your card supports or 0 if you dare. * - IRQ, also choose one your card supports or nothing and let * the driver figure it out. */ #include #ifdef MODULE #include #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* For ltalk_setup() */ #include /* For udelay() */ #include #include "cops.h" /* Our Stuff */ #include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */ #include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */ /* * The name of the card. Is used for messages and in the requests for * io regions, irqs and dma channels */ static const char *cardname = "cops"; #ifdef CONFIG_COPS_DAYNA static int board_type = DAYNA; /* Module exported */ #else static int board_type = TANGENT; #endif #ifdef MODULE static int io = 0x240; /* Default IO for Dayna */ static int irq = 5; /* Default IRQ */ #else static int io = 0; /* Default IO for Dayna */ static int irq = 0; /* Default IRQ */ #endif /* * COPS Autoprobe information. * Right now if port address is right but IRQ is not 5 this will * return a 5 no matter what since we will still get a status response. * Need one more additional check to narrow down after we have gotten * the ioaddr. But since only other possible IRQs is 3 and 4 so no real * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with * this driver. * * This driver has 2 modes and they are: Dayna mode and Tangent mode. * Each mode corresponds with the type of card. It has been found * that there are 2 main types of cards and all other cards are * the same and just have different names or only have minor differences * such as more IO ports. As this driver is tested it will * become more clear on exactly what cards are supported. The driver * defaults to using Dayna mode. To change the drivers mode, simply * select Dayna or Tangent mode when configuring the kernel. * * This driver should support: * TANGENT driver mode: * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200, * COPS LT-1 * DAYNA driver mode: * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95, * Farallon PhoneNET PC III, Farallon PhoneNET PC II * Other cards possibly supported mode unkown though: * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel) * * Cards NOT supported by this driver but supported by the ltpc.c * driver written by Bradford W. Johnson * Farallon PhoneNET PC * Original Apple LocalTalk PC card * * N.B. * * The Daystar Digital LT200 boards do not support interrupt-driven * IO. You must specify 'irq=0xff' as a module parameter to invoke * polled mode. I also believe that the port probing logic is quite * dangerous at best and certainly hopeless for a polled card. Best to * specify both. - Steve H. * */ /* * Zero terminated list of IO ports to probe. */ static unsigned int cops_portlist[] = { 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260, 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360, 0 }; /* * Zero terminated list of IRQ ports to probe. */ static int cops_irqlist[] = { 5, 4, 3, 0 }; static struct timer_list cops_timer; /* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */ #ifndef COPS_DEBUG #define COPS_DEBUG 1 #endif static unsigned int cops_debug = COPS_DEBUG; /* The number of low I/O ports used by the card. */ #define COPS_IO_EXTENT 8 /* Information that needs to be kept for each board. */ struct cops_local { struct enet_statistics stats; int board; /* Holds what board type is. */ int nodeid; /* Set to 1 once have nodeid. */ unsigned char node_acquire; /* Node ID when acquired. */ struct at_addr node_addr; /* Full node addres */ }; /* Index to functions, as function prototypes. */ extern int cops_probe (struct device *dev); static int cops_probe1 (struct device *dev, int ioaddr); static int cops_irq (int ioaddr, int board); static int cops_open (struct device *dev); static int cops_jumpstart (struct device *dev); static void cops_reset (struct device *dev, int sleep); static void cops_load (struct device *dev); static int cops_nodeid (struct device *dev, int nodeid); static void cops_interrupt (int irq, void *dev_id, struct pt_regs *regs); static void cops_poll (unsigned long ltdev); static void cops_rx (struct device *dev); static int cops_send_packet (struct sk_buff *skb, struct device *dev); static void set_multicast_list (struct device *dev); static int cops_hard_header (struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len); static int cops_ioctl (struct device *dev, struct ifreq *rq, int cmd); static int cops_close (struct device *dev); static struct enet_statistics *cops_get_stats (struct device *dev); /* * Check for a network adaptor of this type, and return '0' iff one exists. * If dev->base_addr == 0, probe all likely locations. * If dev->base_addr in [1..0x1ff], always return failure. * otherwise go with what we pass in. */ __initfunc(int cops_probe(struct device *dev)) { int i; int base_addr = dev ? dev->base_addr : 0; if(base_addr == 0 && io) base_addr=io; if(base_addr > 0x1ff) /* Check a single specified location. */ return cops_probe1(dev, base_addr); else if(base_addr != 0) /* Don't probe at all. */ return -ENXIO; /* FIXME Does this really work for cards which generate irq? * It's definitely N.G. for polled Tangent. sh * Dayna cards don't autoprobe well at all, but if your card is * at IRQ 5 & IO 0x240 we find it every time. ;) JS */ for(i=0; cops_portlist[i]; i++) { int ioaddr = cops_portlist[i]; if(check_region(ioaddr, COPS_IO_EXTENT)) continue; if(cops_probe1(dev, ioaddr) == 0) return 0; } return -ENODEV; } /* * This is the real probe routine. Linux has a history of friendly device * probes on the ISA bus. A good device probes avoids doing writes, and * verifies that the correct device exists and functions. */ __initfunc(static int cops_probe1(struct device *dev, int ioaddr)) { struct cops_local *lp; static unsigned version_printed = 0; int board = board_type; if(cops_debug && version_printed++ == 0) printk("%s", version); /* * Since this board has jumpered interrupts, allocate the interrupt * vector now. There is no point in waiting since no other device * can use the interrupt, and this marks the irq as busy. Jumpered * interrupts are typically not reported by the boards, and we must * used AutoIRQ to find them. */ switch (dev->irq) { case 0: /* COPS AutoIRQ routine */ dev->irq = cops_irq(ioaddr, board); if(!dev->irq) return -EINVAL; /* No IRQ found on this port */ break; case 1: return -EINVAL; break; /* Fixup for users that don't know that IRQ 2 is really * IRQ 9, or don't know which one to set. */ case 2: dev->irq = 9; break; /* Polled operation requested. Although irq of zero passed as * a parameter tells the init routines to probe, we'll * overload it to denote polled operation at runtime. */ case 0xff: dev->irq = 0; break; default: break; } /* Reserve any actual interrupt. */ if(dev->irq && request_irq(dev->irq, &cops_interrupt, 0, cardname, dev)) return -EINVAL; /* Grab the region so no one else tries to probe our ioports. */ request_region(ioaddr, COPS_IO_EXTENT, cardname); dev->base_addr = ioaddr; /* Initialize the private device structure. */ dev->priv = kmalloc(sizeof(struct cops_local), GFP_KERNEL); if(dev->priv == NULL) return -ENOMEM; lp = (struct cops_local *)dev->priv; memset(lp, 0, sizeof(struct cops_local)); /* Copy local board variable to lp struct. */ lp->board = board; /* Fill in the fields of the device structure with LocalTalk values. */ ltalk_setup(dev); dev->hard_start_xmit = &cops_send_packet; dev->hard_header = cops_hard_header; dev->get_stats = cops_get_stats; dev->open = cops_open; dev->stop = cops_close; dev->do_ioctl = &cops_ioctl; dev->set_multicast_list = &set_multicast_list; dev->mc_list = NULL; /* Tell the user where the card is and what mode we're in. */ if(board==DAYNA) printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", dev->name, cardname, ioaddr, dev->irq); if(board==TANGENT) { if(dev->irq) printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", dev->name, cardname, ioaddr, dev->irq); else printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", dev->name, cardname, ioaddr); } return 0; } __initfunc(static int cops_irq (int ioaddr, int board)) { /* * This does not use the IRQ to determine where the IRQ is. We just * assume that when we get a correct status response that it's the IRQ. * This really just verifies the IO port but since we only have access * to such a small number of IRQs (5, 4, 3) this is not bad. * This will probably not work for more than one card. */ int irqaddr=0; int i, x, status; if(board==DAYNA) { outb(0, ioaddr+DAYNA_RESET); inb(ioaddr+DAYNA_RESET); udelay(333333); } if(board==TANGENT) { inb(ioaddr); outb(0, ioaddr); outb(0, ioaddr+TANG_RESET); } for(i=0; cops_irqlist[i] !=0; i++) { irqaddr = cops_irqlist[i]; for(x = 0xFFFF; x>0; x --) /* wait for response */ { if(board==DAYNA) { status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); if(status == 1) return irqaddr; } if(board==TANGENT) { if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) return irqaddr; } } } return 0; /* no IRQ found */ } /* * Open/initialize the board. This is called (in the current kernel) * sometime after booting when the 'ifconfig' program is run. */ static int cops_open(struct device *dev) { struct cops_local *lp = (struct cops_local *)dev->priv; if(dev->irq==0) { /* * I don't know if the Dayna-style boards support polled * operation. For now, only allow it for Tangent. */ if(lp->board==TANGENT) /* Poll 20 times per second */ { init_timer(&cops_timer); cops_timer.function = cops_poll; cops_timer.data = (unsigned long)dev; cops_timer.expires = jiffies + 5; add_timer(&cops_timer); } else { printk(KERN_WARNING "%s: No irq line set\n", dev->name); return -EAGAIN; } } cops_jumpstart(dev); /* Start the card up. */ dev->tbusy = 0; dev->interrupt = 0; dev->start = 1; #ifdef MODULE MOD_INC_USE_COUNT; #endif return 0; } /* * This allows for a dynamic start/restart of the entire card. */ static int cops_jumpstart(struct device *dev) { struct cops_local *lp = (struct cops_local *)dev->priv; /* * Once the card has the firmware loaded and has acquired * the nodeid, if it is reset it will lose it all. */ cops_reset(dev,1); /* Need to reset card before load firmware. */ cops_load(dev); /* Load the firmware. */ /* * If atalkd already gave us a nodeid we will use that * one again, else we wait for atalkd to give us a nodeid * in cops_ioctl. This may cause a problem if someone steals * our nodeid while we are resetting. */ if(lp->nodeid == 1) cops_nodeid(dev,lp->node_acquire); return 0; } static void tangent_wait_reset(int ioaddr) { int timeout=0; while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) mdelay(1); /* Wait 1 second */ } /* * Reset the LocalTalk board. */ static void cops_reset(struct device *dev, int sleep) { struct cops_local *lp = (struct cops_local *)dev->priv; int ioaddr=dev->base_addr; if(lp->board==TANGENT) { inb(ioaddr); /* Clear request latch. */ outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ tangent_wait_reset(ioaddr); outb(0, ioaddr+TANG_CLEAR_INT); } if(lp->board==DAYNA) { outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ inb(ioaddr+DAYNA_RESET); /* Clear the reset */ if(sleep) { long snap=jiffies; /* Let card finish initializing, about 1/3 second */ while(jiffies-snaptbusy=0; return; } static void cops_load (struct device *dev) { struct ifreq ifr; struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_data; struct cops_local *lp=(struct cops_local *)dev->priv; int ioaddr=dev->base_addr; int length, i = 0; strcpy(ifr.ifr_name,"lt0"); /* Get card's firmware code and do some checks on it. */ #ifdef CONFIG_COPS_DAYNA if(lp->board==DAYNA) { ltf->length=sizeof(ffdrv_code); ltf->data=ffdrv_code; } else #endif #ifdef CONFIG_COPS_TANGENT if(lp->board==TANGENT) { ltf->length=sizeof(ltdrv_code); ltf->data=ltdrv_code; } else #endif { printk(KERN_INFO "%s; unsupported board type.\n", dev->name); return; } /* Check to make sure firmware is correct length. */ if(lp->board==DAYNA && ltf->length!=5983) { printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); return; } if(lp->board==TANGENT && ltf->length!=2501) { printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); return; } if(lp->board==DAYNA) { /* * We must wait for a status response * with the DAYNA board. */ while(++i<65536) { if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) break; } if(i==65536) return; } /* * Upload the firmware and kick. Byte-by-byte works nicely here. */ i=0; length = ltf->length; while(length--) { outb(ltf->data[i], ioaddr); i++; } if(cops_debug > 1) printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", dev->name, i, ltf->length); if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ outb(1, ioaddr+DAYNA_INT_CARD); else /* Tell Tang to run the firmware code. */ inb(ioaddr); if(lp->board==TANGENT) { tangent_wait_reset(ioaddr); inb(ioaddr); /* Clear initial ready signal. */ } return; } /* * Get the LocalTalk Nodeid from the card. We can suggest * any nodeid 1-254. The card will try and get that exact * address else we can specify 0 as the nodeid and the card * will autoprobe for a nodeid. */ static int cops_nodeid (struct device *dev, int nodeid) { struct cops_local *lp = (struct cops_local *) dev->priv; int ioaddr = dev->base_addr; if(lp->board == DAYNA) { /* Empty any pending adapter responses. */ while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) { outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) cops_rx(dev); /* Kick any packets waiting. */ schedule(); } outb(2, ioaddr); /* Output command packet length as 2. */ outb(0, ioaddr); outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ outb(nodeid, ioaddr); /* Suggest node address. */ } if(lp->board == TANGENT) { /* Empty any pending adapter responses. */ while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) { outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ cops_rx(dev); /* Kick out packets waiting. */ schedule(); } /* Not sure what Tangent does if nodeid picked is used. */ if(nodeid == 0) /* Seed. */ nodeid = jiffies&0xFF; /* Get a random try */ outb(2, ioaddr); /* Command length LSB */ outb(0, ioaddr); /* Command length MSB */ outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ outb(nodeid, ioaddr); /* LAP address hint. */ outb(0xFF, ioaddr); /* Int. level to use */ } lp->node_acquire=0; /* Set nodeid holder to 0. */ while(lp->node_acquire==0) /* Get *True* nodeid finally. */ { outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ if(lp->board == DAYNA) { if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ } if(lp->board == TANGENT) { if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ } schedule(); } if(cops_debug > 1) printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", dev->name, lp->node_acquire); lp->nodeid=1; /* Set got nodeid to 1. */ return 0; } /* * Poll the Tangent type cards to see if we have work. */ static void cops_poll(unsigned long ltdev) { int ioaddr, status; int boguscount = 0; struct device *dev = (struct device *)ltdev; del_timer(&cops_timer); if(dev == NULL) return; /* We've been downed */ ioaddr = dev->base_addr; do { status=inb(ioaddr+TANG_CARD_STATUS); if(status & TANG_RX_READY) cops_rx(dev); if(status & TANG_TX_READY) dev->tbusy = 0; status = inb(ioaddr+TANG_CARD_STATUS); } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); cops_timer.expires = jiffies+5; add_timer(&cops_timer); return; } /* * The typical workload of the driver: * Handle the network interface interrupts. */ static void cops_interrupt(int irq, void *dev_id, struct pt_regs * regs) { struct device *dev = dev_id; struct cops_local *lp; int ioaddr, status; int boguscount = 0; if(dev == NULL) { printk(KERN_WARNING "%s: irq %d for unknown device.\n", cardname, irq); return; } dev->interrupt = 1; ioaddr = dev->base_addr; lp = (struct cops_local *)dev->priv; if(lp->board==DAYNA) { do { outb(0, ioaddr + COPS_CLEAR_INT); status=inb(ioaddr+DAYNA_CARD_STATUS); if((status&0x03)==DAYNA_RX_REQUEST) cops_rx(dev); dev->tbusy = 0; mark_bh(NET_BH); } while(++boguscount < 20); } else { do { status=inb(ioaddr+TANG_CARD_STATUS); if(status & TANG_RX_READY) cops_rx(dev); if(status & TANG_TX_READY) dev->tbusy = 0; status=inb(ioaddr+TANG_CARD_STATUS); } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); } dev->interrupt = 0; return; } /* * We have a good packet(s), get it/them out of the buffers. */ static void cops_rx(struct device *dev) { int pkt_len = 0; int rsp_type = 0; struct sk_buff *skb; struct cops_local *lp = (struct cops_local *)dev->priv; int ioaddr = dev->base_addr; int boguscount = 0; cli(); /* Disable interrupts. */ if(lp->board==DAYNA) { outb(0, ioaddr); /* Send out Zero length. */ outb(0, ioaddr); outb(DATA_READ, ioaddr); /* Send read command out. */ /* Wait for DMA to turn around. */ while(++boguscount<1000000) { if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) break; } if(boguscount==1000000) { printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); return; } } /* Get response length. */ if(lp->board==DAYNA) pkt_len = inb(ioaddr) & 0xFF; else pkt_len = inb(ioaddr) & 0x00FF; pkt_len |= (inb(ioaddr) << 8); /* Input IO code. */ rsp_type=inb(ioaddr); /* Malloc up new buffer. */ skb = dev_alloc_skb(pkt_len); if(skb == NULL) { printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); lp->stats.rx_dropped++; while(pkt_len--) /* Discard packet */ inb(ioaddr); return; } skb->dev = dev; skb_put(skb, pkt_len); skb->protocol = htons(ETH_P_LOCALTALK); insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ if(lp->board==DAYNA) outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ sti(); /* Restore interrupts. */ /* Check for bad response length */ if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) { printk(KERN_NOTICE "%s: Bad packet length of %d bytes.\n", dev->name, pkt_len); lp->stats.tx_errors++; kfree_skb(skb); return; } /* Set nodeid and then get out. */ if(rsp_type == LAP_INIT_RSP) { /* Nodeid taken from received packet. */ lp->node_acquire = skb->data[0]; kfree_skb(skb); return; } /* One last check to make sure we have a good packet. */ if(rsp_type != LAP_RESPONSE) { printk("%s: Bad packet type %d.\n", dev->name, rsp_type); lp->stats.tx_errors++; kfree_skb(skb); return; } skb->mac.raw = skb->data; /* Point to entire packet. */ skb_pull(skb,3); skb->h.raw = skb->data; /* Point to data (Skip header). */ /* Update the counters. */ lp->stats.rx_packets++; lp->stats.rx_bytes += skb->len; /* Send packet to a higher place. */ netif_rx(skb); return; } /* * Make the card transmit a LocalTalk packet. */ static int cops_send_packet(struct sk_buff *skb, struct device *dev) { struct cops_local *lp = (struct cops_local *)dev->priv; int ioaddr = dev->base_addr; if(dev->tbusy) { /* * If we get here, some higher level has decided we are broken. * There should really be a "kick me" function call instead. */ int tickssofar = jiffies - dev->trans_start; if(tickssofar < 5) return 1; lp->stats.tx_errors++; if(lp->board==TANGENT) { if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); } printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); cops_jumpstart(dev); /* Restart the card. */ dev->tbusy=0; dev->trans_start = jiffies; } /* * Block a timer-based transmit from overlapping. This could better be * done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ if(test_and_set_bit(0, (void*) &dev->tbusy) != 0) printk(KERN_WARNING "%s: Transmitter access conflict.\n", dev->name); else { cli(); /* Disable interrupts. */ if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0); /* Output IO length. */ outb(skb->len, ioaddr); if(lp->board == DAYNA) outb(skb->len >> 8, ioaddr); else outb((skb->len >> 8)&0x0FF, ioaddr); /* Output IO code. */ outb(LAP_WRITE, ioaddr); if(lp->board == DAYNA) /* Check the transmit buffer again. */ while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ if(lp->board==DAYNA) /* Dayna requires you kick the card */ outb(1, ioaddr+DAYNA_INT_CARD); sti(); /* Restore interrupts. */ /* Done sending packet, update counters and cleanup. */ lp->stats.tx_packets++; lp->stats.tx_bytes += skb->len; dev->trans_start = jiffies; } dev_kfree_skb (skb); dev->tbusy = 0; return 0; } /* * Dummy function to keep the Appletalk layer happy. */ static void set_multicast_list(struct device *dev) { if(cops_debug >= 3) printk("%s: set_multicast_list executed\n", dev->name); } /* * Another Dummy function to keep the Appletalk layer happy. */ static int cops_hard_header(struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) { if(cops_debug >= 3) printk("%s: cops_hard_header executed. Wow!\n", dev->name); return 0; } /* * System ioctls for the COPS LocalTalk card. */ static int cops_ioctl(struct device *dev, struct ifreq *ifr, int cmd) { struct cops_local *lp = (struct cops_local *)dev->priv; struct sockaddr_at *sa=(struct sockaddr_at *)&ifr->ifr_addr; struct at_addr *aa=(struct at_addr *)&lp->node_addr; switch(cmd) { case SIOCSIFADDR: /* Get and set the nodeid and network # atalkd wants. */ cops_nodeid(dev, sa->sat_addr.s_node); aa->s_net = sa->sat_addr.s_net; aa->s_node = lp->node_acquire; /* Set broardcast address. */ dev->broadcast[0] = 0xFF; /* Set hardware address. */ dev->dev_addr[0] = aa->s_node; dev->addr_len = 1; return 0; case SIOCGIFADDR: sa->sat_addr.s_net = aa->s_net; sa->sat_addr.s_node = aa->s_node; return 0; default: return -EOPNOTSUPP; } } /* * The inverse routine to cops_open(). */ static int cops_close(struct device *dev) { struct cops_local *lp = (struct cops_local *)dev->priv; /* If we were running polled, yank the timer. */ if(lp->board==TANGENT && dev->irq==0) del_timer(&cops_timer); dev->tbusy = 1; dev->start = 0; #ifdef MODULE MOD_DEC_USE_COUNT; #endif return 0; } /* * Get the current statistics. * This may be called with the card open or closed. */ static struct enet_statistics *cops_get_stats(struct device *dev) { struct cops_local *lp = (struct cops_local *)dev->priv; return &lp->stats; } #ifdef MODULE static char lt_name[16]; static struct device cops0_dev = { lt_name, /* device name */ 0, 0, 0, 0, 0x0, 0, /* I/O address, IRQ */ 0, 0, 0, NULL, cops_probe }; MODULE_PARM(io, "i"); MODULE_PARM(irq, "i"); MODULE_PARM(board_type, "i"); int init_module(void) { int result, err; if(io == 0) printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", cardname); /* Copy the parameters from insmod into the device structure. */ cops0_dev.base_addr = io; cops0_dev.irq = irq; err=dev_alloc_name(&cops0_dev, "lt%d"); if(err < 0) return err; if((result = register_netdev(&cops0_dev)) != 0) return result; return 0; } void cleanup_module(void) { /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ unregister_netdev(&cops0_dev); if(cops0_dev.priv) kfree_s(cops0_dev.priv, sizeof(struct cops_local)); if(cops0_dev.irq) free_irq(cops0_dev.irq, &cops0_dev); release_region(cops0_dev.base_addr, COPS_IO_EXTENT); } #endif /* MODULE */ /* * Local variables: * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c" * c-basic-offset: 4 * c-file-offsets: ((substatement-open . 0)) * End: */