diff options
Diffstat (limited to 'kernel/drivers/net/appletalk/cops.c')
| -rw-r--r-- | kernel/drivers/net/appletalk/cops.c | 1010 |
1 files changed, 1010 insertions, 0 deletions
diff --git a/kernel/drivers/net/appletalk/cops.c b/kernel/drivers/net/appletalk/cops.c new file mode 100644 index 000000000..7f2a032c3 --- /dev/null +++ b/kernel/drivers/net/appletalk/cops.c @@ -0,0 +1,1010 @@ +/* cops.c: LocalTalk driver for Linux. + * + * Authors: + * - Jay Schulist <jschlst@samba.org> + * + * With more than a little help from; + * - Alan Cox <alan@lxorguk.ukuu.org.uk> + * + * 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 General 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. + * 20000211 Alan Cox Cleaned up for softnet + */ + +static const char *version = +"cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/if_arp.h> +#include <linux/if_ltalk.h> +#include <linux/delay.h> /* For udelay() */ +#include <linux/atalk.h> +#include <linux/spinlock.h> +#include <linux/bitops.h> +#include <linux/jiffies.h> + +#include <asm/io.h> +#include <asm/dma.h> + +#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 + +static int io = 0x240; /* Default IO for Dayna */ +static int irq = 5; /* Default IRQ */ + +/* + * 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 unknown 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 <johns393@maroon.tc.umn.edu> + * 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 ports[] = { + 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 +{ + int board; /* Holds what board type is. */ + int nodeid; /* Set to 1 once have nodeid. */ + unsigned char node_acquire; /* Node ID when acquired. */ + struct atalk_addr node_addr; /* Full node address */ + spinlock_t lock; /* RX/TX lock */ +}; + +/* Index to functions, as function prototypes. */ +static int cops_probe1 (struct net_device *dev, int ioaddr); +static int cops_irq (int ioaddr, int board); + +static int cops_open (struct net_device *dev); +static int cops_jumpstart (struct net_device *dev); +static void cops_reset (struct net_device *dev, int sleep); +static void cops_load (struct net_device *dev); +static int cops_nodeid (struct net_device *dev, int nodeid); + +static irqreturn_t cops_interrupt (int irq, void *dev_id); +static void cops_poll (unsigned long ltdev); +static void cops_timeout(struct net_device *dev); +static void cops_rx (struct net_device *dev); +static netdev_tx_t cops_send_packet (struct sk_buff *skb, + struct net_device *dev); +static void set_multicast_list (struct net_device *dev); +static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); +static int cops_close (struct net_device *dev); + +static void cleanup_card(struct net_device *dev) +{ + if (dev->irq) + free_irq(dev->irq, dev); + release_region(dev->base_addr, COPS_IO_EXTENT); +} + +/* + * 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. + */ +struct net_device * __init cops_probe(int unit) +{ + struct net_device *dev; + unsigned *port; + int base_addr; + int err = 0; + + dev = alloc_ltalkdev(sizeof(struct cops_local)); + if (!dev) + return ERR_PTR(-ENOMEM); + + if (unit >= 0) { + sprintf(dev->name, "lt%d", unit); + netdev_boot_setup_check(dev); + irq = dev->irq; + base_addr = dev->base_addr; + } else { + base_addr = dev->base_addr = io; + } + + if (base_addr > 0x1ff) { /* Check a single specified location. */ + err = cops_probe1(dev, base_addr); + } else if (base_addr != 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + /* 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 (port = ports; *port && cops_probe1(dev, *port) < 0; port++) + ; + if (!*port) + err = -ENODEV; + } + 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); +} + +static const struct net_device_ops cops_netdev_ops = { + .ndo_open = cops_open, + .ndo_stop = cops_close, + .ndo_start_xmit = cops_send_packet, + .ndo_tx_timeout = cops_timeout, + .ndo_do_ioctl = cops_ioctl, + .ndo_set_rx_mode = set_multicast_list, +}; + +/* + * 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. + */ +static int __init cops_probe1(struct net_device *dev, int ioaddr) +{ + struct cops_local *lp; + static unsigned version_printed; + int board = board_type; + int retval; + + if(cops_debug && version_printed++ == 0) + printk("%s", version); + + /* Grab the region so no one else tries to probe our ioports. */ + if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) + return -EBUSY; + + /* + * 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. + */ + dev->irq = irq; + switch (dev->irq) + { + case 0: + /* COPS AutoIRQ routine */ + dev->irq = cops_irq(ioaddr, board); + if (dev->irq) + break; + /* No IRQ found on this port, fallthrough */ + case 1: + retval = -EINVAL; + goto err_out; + + /* 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) { + retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); + if (retval) + goto err_out; + } + + dev->base_addr = ioaddr; + + lp = netdev_priv(dev); + spin_lock_init(&lp->lock); + + /* Copy local board variable to lp struct. */ + lp->board = board; + + dev->netdev_ops = &cops_netdev_ops; + dev->watchdog_timeo = HZ * 2; + + + /* 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; + +err_out: + release_region(ioaddr, COPS_IO_EXTENT); + return retval; +} + +static int __init 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); + mdelay(333); + } + 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 net_device *dev) +{ + struct cops_local *lp = netdev_priv(dev); + + 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 + HZ/20; + 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. */ + + netif_start_queue(dev); + return 0; +} + +/* + * This allows for a dynamic start/restart of the entire card. + */ +static int cops_jumpstart(struct net_device *dev) +{ + struct cops_local *lp = netdev_priv(dev); + + /* + * 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 net_device *dev, int sleep) +{ + struct cops_local *lp = netdev_priv(dev); + 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) + msleep(333); + else + mdelay(333); + } + + netif_wake_queue(dev); +} + +static void cops_load (struct net_device *dev) +{ + struct ifreq ifr; + struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; + struct cops_local *lp = netdev_priv(dev); + 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. */ + } +} + +/* + * 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 net_device *dev, int nodeid) +{ + struct cops_local *lp = netdev_priv(dev); + 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 net_device *dev = (struct net_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) + netif_wake_queue(dev); + status = inb(ioaddr+TANG_CARD_STATUS); + } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); + + /* poll 20 times per second */ + cops_timer.expires = jiffies + HZ/20; + add_timer(&cops_timer); +} + +/* + * The typical workload of the driver: + * Handle the network interface interrupts. + */ +static irqreturn_t cops_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct cops_local *lp; + int ioaddr, status; + int boguscount = 0; + + ioaddr = dev->base_addr; + lp = netdev_priv(dev); + + 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); + netif_wake_queue(dev); + } while(++boguscount < 20); + } + else + { + do { + status=inb(ioaddr+TANG_CARD_STATUS); + if(status & TANG_RX_READY) + cops_rx(dev); + if(status & TANG_TX_READY) + netif_wake_queue(dev); + status=inb(ioaddr+TANG_CARD_STATUS); + } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); + } + + return IRQ_HANDLED; +} + +/* + * We have a good packet(s), get it/them out of the buffers. + */ +static void cops_rx(struct net_device *dev) +{ + int pkt_len = 0; + int rsp_type = 0; + struct sk_buff *skb = NULL; + struct cops_local *lp = netdev_priv(dev); + int ioaddr = dev->base_addr; + int boguscount = 0; + unsigned long flags; + + + spin_lock_irqsave(&lp->lock, flags); + + 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) + { + barrier(); + if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) + break; + } + + if(boguscount==1000000) + { + printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); + spin_unlock_irqrestore(&lp->lock, flags); + 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_WARNING "%s: Memory squeeze, dropping packet.\n", + dev->name); + dev->stats.rx_dropped++; + while(pkt_len--) /* Discard packet */ + inb(ioaddr); + spin_unlock_irqrestore(&lp->lock, flags); + 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 */ + + spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ + + /* Check for bad response length */ + if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) + { + printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", + dev->name, pkt_len); + dev->stats.tx_errors++; + dev_kfree_skb_any(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]; + dev_kfree_skb_any(skb); + return; + } + + /* One last check to make sure we have a good packet. */ + if(rsp_type != LAP_RESPONSE) + { + printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); + dev->stats.tx_errors++; + dev_kfree_skb_any(skb); + return; + } + + skb_reset_mac_header(skb); /* Point to entire packet. */ + skb_pull(skb,3); + skb_reset_transport_header(skb); /* Point to data (Skip header). */ + + /* Update the counters. */ + dev->stats.rx_packets++; + dev->stats.rx_bytes += skb->len; + + /* Send packet to a higher place. */ + netif_rx(skb); +} + +static void cops_timeout(struct net_device *dev) +{ + struct cops_local *lp = netdev_priv(dev); + int ioaddr = dev->base_addr; + + dev->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->trans_start = jiffies; /* prevent tx timeout */ + netif_wake_queue(dev); +} + + +/* + * Make the card transmit a LocalTalk packet. + */ + +static netdev_tx_t cops_send_packet(struct sk_buff *skb, + struct net_device *dev) +{ + struct cops_local *lp = netdev_priv(dev); + int ioaddr = dev->base_addr; + unsigned long flags; + + /* + * Block a timer-based transmit from overlapping. + */ + + netif_stop_queue(dev); + + spin_lock_irqsave(&lp->lock, flags); + if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ + while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) + cpu_relax(); + if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ + while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) + cpu_relax(); + + /* 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); + + spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ + + /* Done sending packet, update counters and cleanup. */ + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + dev_kfree_skb (skb); + return NETDEV_TX_OK; +} + +/* + * Dummy function to keep the Appletalk layer happy. + */ + +static void set_multicast_list(struct net_device *dev) +{ + if(cops_debug >= 3) + printk("%s: set_multicast_list executed\n", dev->name); +} + +/* + * System ioctls for the COPS LocalTalk card. + */ + +static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct cops_local *lp = netdev_priv(dev); + struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; + struct atalk_addr *aa = &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 net_device *dev) +{ + struct cops_local *lp = netdev_priv(dev); + + /* If we were running polled, yank the timer. + */ + if(lp->board==TANGENT && dev->irq==0) + del_timer(&cops_timer); + + netif_stop_queue(dev); + return 0; +} + + +#ifdef MODULE +static struct net_device *cops_dev; + +MODULE_LICENSE("GPL"); +module_param(io, int, 0); +module_param(irq, int, 0); +module_param(board_type, int, 0); + +static int __init cops_module_init(void) +{ + if (io == 0) + printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", + cardname); + cops_dev = cops_probe(-1); + return PTR_ERR_OR_ZERO(cops_dev); +} + +static void __exit cops_module_exit(void) +{ + unregister_netdev(cops_dev); + cleanup_card(cops_dev); + free_netdev(cops_dev); +} +module_init(cops_module_init); +module_exit(cops_module_exit); +#endif /* MODULE */ |