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linux_dsm_epyc7002/drivers/net/appletalk/cops.c
Rusty Russell 8c6ffba0ed PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. 
Sweep of the simple cases.

Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-15 11:25:01 +09:30

1011 lines
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/* 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 */
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