korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-15 16:24:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
64704c92fd
linux/drivers/net/appletalk/cops.c
Colin Ian King bd437c99cf drivers/net: appletalk/cops: remove redundant if statement and mask 
The two different assignments for pkt_len are actually the same and
so the if statement is redundant and can be removed.  Masking a u8
return value from inb() with 0xFF is also redundant and can also be
emoved.

Similarly, the two different outb calls are identical as the mask
of 0xff on the second outb is redundant since a u8 is being written,
so the if statement is also redundant and can be also removed.

Detected by CoverityScan, CID#1475639 ("Identical code for different
branches")

V2: Remove the if statement for the outb calls, thanks to David
Miller for spotting this.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-24 14:48:26 -08:00

1004 lines
28 KiB
C
Raw Blame History

/* 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;
static struct net_device *cops_timer_dev;
/* 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(struct timer_list *t);
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 */
{
cops_timer_dev = dev;
timer_setup(&cops_timer, cops_poll, 0);
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(struct timer_list *unused)
{
int ioaddr, status;
int boguscount = 0;
struct net_device *dev = cops_timer_dev;
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. */
pkt_len = inb(ioaddr);
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. */
netif_trans_update(dev); /* 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);
outb(skb->len >> 8, 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_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param_hw(board_type, int, other, 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 */
Reference in New Issue View Git Blame Copy Permalink