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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/wan/hostess_sv11.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/wan/hostess_sv11.c')
-rw-r--r-- | drivers/net/wan/hostess_sv11.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/drivers/net/wan/hostess_sv11.c b/drivers/net/wan/hostess_sv11.c new file mode 100644 index 000000000000..7db1d1d0bb34 --- /dev/null +++ b/drivers/net/wan/hostess_sv11.c @@ -0,0 +1,420 @@ +/* + * 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 - it's 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 don't 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); + 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; + } + 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; +} + +static void sv11_setup(struct net_device *dev) +{ + dev->open = hostess_open; + dev->stop = hostess_close; + dev->hard_start_xmit = hostess_queue_xmit; + dev->get_stats = hostess_get_stats; + dev->do_ioctl = hostess_ioctl; + dev->neigh_setup = hostess_neigh_setup_dev; +} + +/* + * 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; + + /* + * 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 = alloc_netdev(0, "hdlc%d", sv11_setup); + if(!sv->netdev.dev) + goto fail2; + + SET_MODULE_OWNER(sv->netdev.dev); + + 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 SV11", 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; + } + } + + /* Kill our private IRQ line the hostess can end up chattering + until the configuration is set */ + disable_irq(irq); + + /* + * Begin normal initialise + */ + + if(z8530_init(dev)!=0) + { + printk(KERN_ERR "Z8530 series device not found.\n"); + enable_irq(irq); + 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); + + enable_irq(irq); + + + /* + * 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; + + if(register_netdev(d)) + { + printk(KERN_ERR "%s: unable to register device.\n", + d->name); + sppp_detach(d); + goto dmafail2; + } + + 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: + free_netdev(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); + unregister_netdev(dev->netdev.dev); + z8530_shutdown(&dev->sync); + 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); + free_netdev(dev->netdev.dev); + kfree(dev); +} + +#ifdef MODULE + +static int io=0x200; +static int irq=9; + +module_param(io, int, 0); +MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card"); +module_param(dma, int, 0); +MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX"); +module_param(irq, int, 0); +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 0.03.\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 + |