hostess_sv11.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:8k
- /*
- * Comtrol SV11 card driver
- *
- * This is a slightly odd Z85230 synchronous driver. All you need to
- * know basically is
- *
- * Its a genuine Z85230
- *
- * It supports DMA using two DMA channels in SYNC mode. The driver doesn't
- * use these facilities
- *
- * The control port is at io+1, the data at io+3 and turning off the DMA
- * is done by writing 0 to io+4
- *
- * The hardware does the bus handling to avoid the need for delays between
- * touching control registers.
- *
- * Port B isnt wired (why - beats me)
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/mm.h>
- #include <linux/net.h>
- #include <linux/skbuff.h>
- #include <linux/netdevice.h>
- #include <linux/if_arp.h>
- #include <linux/delay.h>
- #include <linux/ioport.h>
- #include <net/arp.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <asm/byteorder.h>
- #include <net/syncppp.h>
- #include "z85230.h"
- static int dma;
- struct sv11_device
- {
- void *if_ptr; /* General purpose pointer (used by SPPP) */
- struct z8530_dev sync;
- struct ppp_device netdev;
- };
- /*
- * Network driver support routines
- */
- /*
- * Frame receive. Simple for our card as we do sync ppp and there
- * is no funny garbage involved
- */
-
- static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
- {
- /* Drop the CRC - its not a good idea to try and negotiate it ;) */
- skb_trim(skb, skb->len-2);
- skb->protocol=__constant_htons(ETH_P_WAN_PPP);
- skb->mac.raw=skb->data;
- skb->dev=c->netdevice;
- /*
- * Send it to the PPP layer. We dont have time to process
- * it right now.
- */
- netif_rx(skb);
- c->netdevice->last_rx = jiffies;
- }
-
- /*
- * We've been placed in the UP state
- */
-
- static int hostess_open(struct net_device *d)
- {
- struct sv11_device *sv11=d->priv;
- int err = -1;
-
- /*
- * Link layer up
- */
- switch(dma)
- {
- case 0:
- err=z8530_sync_open(d, &sv11->sync.chanA);
- break;
- case 1:
- err=z8530_sync_dma_open(d, &sv11->sync.chanA);
- break;
- case 2:
- err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
- break;
- }
-
- if(err)
- return err;
- /*
- * Begin PPP
- */
- err=sppp_open(d);
- if(err)
- {
- switch(dma)
- {
- case 0:
- z8530_sync_close(d, &sv11->sync.chanA);
- break;
- case 1:
- z8530_sync_dma_close(d, &sv11->sync.chanA);
- break;
- case 2:
- z8530_sync_txdma_close(d, &sv11->sync.chanA);
- break;
- }
- return err;
- }
- sv11->sync.chanA.rx_function=hostess_input;
-
- /*
- * Go go go
- */
- netif_start_queue(d);
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int hostess_close(struct net_device *d)
- {
- struct sv11_device *sv11=d->priv;
- /*
- * Discard new frames
- */
- sv11->sync.chanA.rx_function=z8530_null_rx;
- /*
- * PPP off
- */
- sppp_close(d);
- /*
- * Link layer down
- */
- netif_stop_queue(d);
-
- switch(dma)
- {
- case 0:
- z8530_sync_close(d, &sv11->sync.chanA);
- break;
- case 1:
- z8530_sync_dma_close(d, &sv11->sync.chanA);
- break;
- case 2:
- z8530_sync_txdma_close(d, &sv11->sync.chanA);
- break;
- }
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
- {
- /* struct sv11_device *sv11=d->priv;
- z8530_ioctl(d,&sv11->sync.chanA,ifr,cmd) */
- return sppp_do_ioctl(d, ifr,cmd);
- }
- static struct net_device_stats *hostess_get_stats(struct net_device *d)
- {
- struct sv11_device *sv11=d->priv;
- if(sv11)
- return z8530_get_stats(&sv11->sync.chanA);
- else
- return NULL;
- }
- /*
- * Passed PPP frames, fire them downwind.
- */
-
- static int hostess_queue_xmit(struct sk_buff *skb, struct net_device *d)
- {
- struct sv11_device *sv11=d->priv;
- return z8530_queue_xmit(&sv11->sync.chanA, skb);
- }
- static int hostess_neigh_setup(struct neighbour *n)
- {
- if (n->nud_state == NUD_NONE) {
- n->ops = &arp_broken_ops;
- n->output = n->ops->output;
- }
- return 0;
- }
- static int hostess_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
- {
- if (p->tbl->family == AF_INET) {
- p->neigh_setup = hostess_neigh_setup;
- p->ucast_probes = 0;
- p->mcast_probes = 0;
- }
- return 0;
- }
- /*
- * Description block for a Comtrol Hostess SV11 card
- */
-
- static struct sv11_device *sv11_init(int iobase, int irq)
- {
- struct z8530_dev *dev;
- struct sv11_device *sv;
- unsigned long flags;
-
- /*
- * Get the needed I/O space
- */
-
- if(!request_region(iobase, 8, "Comtrol SV11"))
- {
- printk(KERN_WARNING "hostess: I/O 0x%X already in use.n", iobase);
- return NULL;
- }
-
- sv=(struct sv11_device *)kmalloc(sizeof(struct sv11_device), GFP_KERNEL);
- if(!sv)
- goto fail3;
-
- memset(sv, 0, sizeof(*sv));
- sv->if_ptr=&sv->netdev;
-
- sv->netdev.dev=(struct net_device *)kmalloc(sizeof(struct net_device), GFP_KERNEL);
- if(!sv->netdev.dev)
- goto fail2;
- dev=&sv->sync;
-
- /*
- * Stuff in the I/O addressing
- */
-
- dev->active = 0;
-
- dev->chanA.ctrlio=iobase+1;
- dev->chanA.dataio=iobase+3;
- dev->chanB.ctrlio=-1;
- dev->chanB.dataio=-1;
- dev->chanA.irqs=&z8530_nop;
- dev->chanB.irqs=&z8530_nop;
-
- outb(0, iobase+4); /* DMA off */
-
- /* We want a fast IRQ for this device. Actually we'd like an even faster
- IRQ ;) - This is one driver RtLinux is made for */
-
- if(request_irq(irq, &z8530_interrupt, SA_INTERRUPT, "Hostess SV/11", dev)<0)
- {
- printk(KERN_WARNING "hostess: IRQ %d already in use.n", irq);
- goto fail1;
- }
-
- dev->irq=irq;
- dev->chanA.private=sv;
- dev->chanA.netdevice=sv->netdev.dev;
- dev->chanA.dev=dev;
- dev->chanB.dev=dev;
-
- if(dma)
- {
- /*
- * You can have DMA off or 1 and 3 thats the lot
- * on the Comtrol.
- */
- dev->chanA.txdma=3;
- dev->chanA.rxdma=1;
- outb(0x03|0x08, iobase+4); /* DMA on */
- if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
- goto fail;
-
- if(dma==1)
- {
- if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
- goto dmafail;
- }
- }
- save_flags(flags);
- cli();
-
- /*
- * Begin normal initialise
- */
-
- if(z8530_init(dev)!=0)
- {
- printk(KERN_ERR "Z8530 series device not found.n");
- restore_flags(flags);
- goto dmafail2;
- }
- z8530_channel_load(&dev->chanB, z8530_dead_port);
- if(dev->type==Z85C30)
- z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
- else
- z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
-
- restore_flags(flags);
- /*
- * Now we can take the IRQ
- */
- if(dev_alloc_name(dev->chanA.netdevice,"hdlc%d")>=0)
- {
- struct net_device *d=dev->chanA.netdevice;
- /*
- * Initialise the PPP components
- */
- sppp_attach(&sv->netdev);
-
- /*
- * Local fields
- */
-
- d->base_addr = iobase;
- d->irq = irq;
- d->priv = sv;
- d->init = NULL;
-
- d->open = hostess_open;
- d->stop = hostess_close;
- d->hard_start_xmit = hostess_queue_xmit;
- d->get_stats = hostess_get_stats;
- d->set_multicast_list = NULL;
- d->do_ioctl = hostess_ioctl;
- d->neigh_setup = hostess_neigh_setup_dev;
- d->set_mac_address = NULL;
-
- if(register_netdev(d)==-1)
- {
- printk(KERN_ERR "%s: unable to register device.n",
- d->name);
- goto fail;
- }
- z8530_describe(dev, "I/O", iobase);
- dev->active=1;
- return sv;
- }
- dmafail2:
- if(dma==1)
- free_dma(dev->chanA.rxdma);
- dmafail:
- if(dma)
- free_dma(dev->chanA.txdma);
- fail:
- free_irq(irq, dev);
- fail1:
- kfree(sv->netdev.dev);
- fail2:
- kfree(sv);
- fail3:
- release_region(iobase,8);
- return NULL;
- }
- static void sv11_shutdown(struct sv11_device *dev)
- {
- sppp_detach(dev->netdev.dev);
- z8530_shutdown(&dev->sync);
- unregister_netdev(dev->netdev.dev);
- free_irq(dev->sync.irq, dev);
- if(dma)
- {
- if(dma==1)
- free_dma(dev->sync.chanA.rxdma);
- free_dma(dev->sync.chanA.txdma);
- }
- release_region(dev->sync.chanA.ctrlio-1, 8);
- }
- #ifdef MODULE
- static int io=0x200;
- static int irq=9;
- MODULE_PARM(io,"i");
- MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
- MODULE_PARM(dma,"i");
- MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
- MODULE_PARM(irq,"i");
- MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
- MODULE_AUTHOR("Alan Cox");
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
- static struct sv11_device *sv11_unit;
- int init_module(void)
- {
- printk(KERN_INFO "SV-11 Z85230 Synchronous Driver v 0.02.n");
- printk(KERN_INFO "(c) Copyright 2001, Red Hat Inc.n");
- if((sv11_unit=sv11_init(io,irq))==NULL)
- return -ENODEV;
- return 0;
- }
- void cleanup_module(void)
- {
- if(sv11_unit)
- sv11_shutdown(sv11_unit);
- }
- #endif