| /* cops.c: LocalTalk driver for Linux. |
| * |
| * Authors: |
| * - Jay Schulist <jschlst@samba.org> |
| * |
| * With more than a little help from; |
| * - Alan Cox <Alan.Cox@linux.org> |
| * |
| * 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/slab.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 <asm/system.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 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 <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 |
| { |
| struct net_device_stats 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 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, struct pt_regs *regs); |
| static void cops_poll (unsigned long ltdev); |
| static void cops_timeout(struct net_device *dev); |
| static void cops_rx (struct net_device *dev); |
| static int cops_send_packet (struct sk_buff *skb, struct net_device *dev); |
| static void set_multicast_list (struct net_device *dev); |
| static int cops_hard_header (struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, void *daddr, void *saddr, |
| unsigned len); |
| |
| static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); |
| static int cops_close (struct net_device *dev); |
| static struct net_device_stats *cops_get_stats (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; |
| } |
| |
| SET_MODULE_OWNER(dev); |
| |
| 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); |
| } |
| |
| /* |
| * 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); |
| memset(lp, 0, sizeof(struct cops_local)); |
| spin_lock_init(&lp->lock); |
| |
| /* Copy local board variable to lp struct. */ |
| lp->board = board; |
| |
| dev->hard_start_xmit = cops_send_packet; |
| dev->tx_timeout = cops_timeout; |
| dev->watchdog_timeo = HZ * 2; |
| 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; |
| |
| 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) |
| { |
| long snap=jiffies; |
| |
| /* Let card finish initializing, about 1/3 second */ |
| while(jiffies-snap<HZ/3) |
| schedule(); |
| } |
| else |
| mdelay(333); |
| } |
| netif_wake_queue(dev); |
| return; |
| } |
| |
| 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. */ |
| } |
| |
| 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 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); |
| |
| return; |
| } |
| |
| /* |
| * The typical workload of the driver: |
| * Handle the network interface interrupts. |
| */ |
| static irqreturn_t cops_interrupt(int irq, void *dev_id, struct pt_regs * regs) |
| { |
| 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); |
| lp->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); |
| lp->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); |
| lp->stats.tx_errors++; |
| dev_kfree_skb_any(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); |
| dev->last_rx = jiffies; |
| } |
| |
| static void cops_timeout(struct net_device *dev) |
| { |
| struct cops_local *lp = netdev_priv(dev); |
| int ioaddr = dev->base_addr; |
| |
| 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->trans_start = jiffies; |
| netif_wake_queue(dev); |
| } |
| |
| |
| /* |
| * Make the card transmit a LocalTalk packet. |
| */ |
| |
| static int 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. */ |
| lp->stats.tx_packets++; |
| lp->stats.tx_bytes += skb->len; |
| dev->trans_start = jiffies; |
| dev_kfree_skb (skb); |
| return 0; |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * Another Dummy function to keep the Appletalk layer happy. |
| */ |
| |
| static int cops_hard_header(struct sk_buff *skb, struct net_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 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 = (struct atalk_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 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; |
| } |
| |
| /* |
| * Get the current statistics. |
| * This may be called with the card open or closed. |
| */ |
| static struct net_device_stats *cops_get_stats(struct net_device *dev) |
| { |
| struct cops_local *lp = netdev_priv(dev); |
| return &lp->stats; |
| } |
| |
| #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); |
| |
| int init_module(void) |
| { |
| if (io == 0) |
| printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", |
| cardname); |
| cops_dev = cops_probe(-1); |
| if (IS_ERR(cops_dev)) |
| return PTR_ERR(cops_dev); |
| return 0; |
| } |
| |
| void cleanup_module(void) |
| { |
| unregister_netdev(cops_dev); |
| cleanup_card(cops_dev); |
| free_netdev(cops_dev); |
| } |
| #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: |
| */ |