| /* |
| * Sealevel Systems 4021 driver. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * (c) Copyright 1999, 2001 Alan Cox |
| * (c) Copyright 2001 Red Hat Inc. |
| * |
| */ |
| |
| #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 <linux/init.h> |
| #include <net/arp.h> |
| |
| #include <asm/irq.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| #include <asm/byteorder.h> |
| #include <net/syncppp.h> |
| #include "z85230.h" |
| |
| |
| struct slvl_device |
| { |
| void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| struct z8530_channel *chan; |
| struct ppp_device pppdev; |
| int channel; |
| }; |
| |
| |
| struct slvl_board |
| { |
| struct slvl_device *dev[2]; |
| struct z8530_dev board; |
| int iobase; |
| }; |
| |
| /* |
| * Network driver support routines |
| */ |
| |
| /* |
| * Frame receive. Simple for our card as we do sync ppp and there |
| * is no funny garbage involved |
| */ |
| |
| static void sealevel_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=htons(ETH_P_WAN_PPP); |
| skb_reset_mac_header(skb); |
| 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 sealevel_open(struct net_device *d) |
| { |
| struct slvl_device *slvl=d->priv; |
| int err = -1; |
| int unit = slvl->channel; |
| |
| /* |
| * Link layer up. |
| */ |
| |
| switch(unit) |
| { |
| case 0: |
| err=z8530_sync_dma_open(d, slvl->chan); |
| break; |
| case 1: |
| err=z8530_sync_open(d, slvl->chan); |
| break; |
| } |
| |
| if(err) |
| return err; |
| /* |
| * Begin PPP |
| */ |
| err=sppp_open(d); |
| if(err) |
| { |
| switch(unit) |
| { |
| case 0: |
| z8530_sync_dma_close(d, slvl->chan); |
| break; |
| case 1: |
| z8530_sync_close(d, slvl->chan); |
| break; |
| } |
| return err; |
| } |
| |
| slvl->chan->rx_function=sealevel_input; |
| |
| /* |
| * Go go go |
| */ |
| netif_start_queue(d); |
| return 0; |
| } |
| |
| static int sealevel_close(struct net_device *d) |
| { |
| struct slvl_device *slvl=d->priv; |
| int unit = slvl->channel; |
| |
| /* |
| * Discard new frames |
| */ |
| |
| slvl->chan->rx_function=z8530_null_rx; |
| |
| /* |
| * PPP off |
| */ |
| sppp_close(d); |
| /* |
| * Link layer down |
| */ |
| |
| netif_stop_queue(d); |
| |
| switch(unit) |
| { |
| case 0: |
| z8530_sync_dma_close(d, slvl->chan); |
| break; |
| case 1: |
| z8530_sync_close(d, slvl->chan); |
| break; |
| } |
| return 0; |
| } |
| |
| static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd) |
| { |
| /* struct slvl_device *slvl=d->priv; |
| z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */ |
| return sppp_do_ioctl(d, ifr,cmd); |
| } |
| |
| static struct net_device_stats *sealevel_get_stats(struct net_device *d) |
| { |
| struct slvl_device *slvl=d->priv; |
| if(slvl) |
| return z8530_get_stats(slvl->chan); |
| else |
| return NULL; |
| } |
| |
| /* |
| * Passed PPP frames, fire them downwind. |
| */ |
| |
| static int sealevel_queue_xmit(struct sk_buff *skb, struct net_device *d) |
| { |
| struct slvl_device *slvl=d->priv; |
| return z8530_queue_xmit(slvl->chan, skb); |
| } |
| |
| static int sealevel_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 sealevel_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p) |
| { |
| if (p->tbl->family == AF_INET) { |
| p->neigh_setup = sealevel_neigh_setup; |
| p->ucast_probes = 0; |
| p->mcast_probes = 0; |
| } |
| return 0; |
| } |
| |
| static int sealevel_attach(struct net_device *dev) |
| { |
| struct slvl_device *sv = dev->priv; |
| sppp_attach(&sv->pppdev); |
| return 0; |
| } |
| |
| static void sealevel_detach(struct net_device *dev) |
| { |
| sppp_detach(dev); |
| } |
| |
| static void slvl_setup(struct net_device *d) |
| { |
| d->open = sealevel_open; |
| d->stop = sealevel_close; |
| d->init = sealevel_attach; |
| d->uninit = sealevel_detach; |
| d->hard_start_xmit = sealevel_queue_xmit; |
| d->get_stats = sealevel_get_stats; |
| d->set_multicast_list = NULL; |
| d->do_ioctl = sealevel_ioctl; |
| d->neigh_setup = sealevel_neigh_setup_dev; |
| d->set_mac_address = NULL; |
| |
| } |
| |
| static inline struct slvl_device *slvl_alloc(int iobase, int irq) |
| { |
| struct net_device *d; |
| struct slvl_device *sv; |
| |
| d = alloc_netdev(sizeof(struct slvl_device), "hdlc%d", |
| slvl_setup); |
| |
| if (!d) |
| return NULL; |
| |
| sv = d->priv; |
| d->ml_priv = sv; |
| sv->if_ptr = &sv->pppdev; |
| sv->pppdev.dev = d; |
| d->base_addr = iobase; |
| d->irq = irq; |
| |
| return sv; |
| } |
| |
| |
| /* |
| * Allocate and setup Sealevel board. |
| */ |
| |
| static __init struct slvl_board *slvl_init(int iobase, int irq, |
| int txdma, int rxdma, int slow) |
| { |
| struct z8530_dev *dev; |
| struct slvl_board *b; |
| |
| /* |
| * Get the needed I/O space |
| */ |
| |
| if(!request_region(iobase, 8, "Sealevel 4021")) |
| { |
| printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase); |
| return NULL; |
| } |
| |
| b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL); |
| if(!b) |
| goto fail3; |
| |
| if (!(b->dev[0]= slvl_alloc(iobase, irq))) |
| goto fail2; |
| |
| b->dev[0]->chan = &b->board.chanA; |
| b->dev[0]->channel = 0; |
| |
| if (!(b->dev[1] = slvl_alloc(iobase, irq))) |
| goto fail1_0; |
| |
| b->dev[1]->chan = &b->board.chanB; |
| b->dev[1]->channel = 1; |
| |
| dev = &b->board; |
| |
| /* |
| * Stuff in the I/O addressing |
| */ |
| |
| dev->active = 0; |
| |
| b->iobase = iobase; |
| |
| /* |
| * Select 8530 delays for the old board |
| */ |
| |
| if(slow) |
| iobase |= Z8530_PORT_SLEEP; |
| |
| dev->chanA.ctrlio=iobase+1; |
| dev->chanA.dataio=iobase; |
| dev->chanB.ctrlio=iobase+3; |
| dev->chanB.dataio=iobase+2; |
| |
| dev->chanA.irqs=&z8530_nop; |
| dev->chanB.irqs=&z8530_nop; |
| |
| /* |
| * Assert DTR enable DMA |
| */ |
| |
| outb(3|(1<<7), b->iobase+4); |
| |
| |
| /* 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, IRQF_DISABLED, "SeaLevel", dev)<0) |
| { |
| printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq); |
| goto fail1_1; |
| } |
| |
| dev->irq=irq; |
| dev->chanA.private=&b->dev[0]; |
| dev->chanB.private=&b->dev[1]; |
| dev->chanA.netdevice=b->dev[0]->pppdev.dev; |
| dev->chanB.netdevice=b->dev[1]->pppdev.dev; |
| dev->chanA.dev=dev; |
| dev->chanB.dev=dev; |
| |
| dev->chanA.txdma=3; |
| dev->chanA.rxdma=1; |
| if(request_dma(dev->chanA.txdma, "SeaLevel (TX)")!=0) |
| goto fail; |
| |
| if(request_dma(dev->chanA.rxdma, "SeaLevel (RX)")!=0) |
| goto dmafail; |
| |
| 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; |
| } |
| if(dev->type==Z85C30) |
| { |
| z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream); |
| z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream); |
| } |
| else |
| { |
| z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230); |
| z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230); |
| } |
| |
| /* |
| * Now we can take the IRQ |
| */ |
| |
| enable_irq(irq); |
| |
| if (register_netdev(b->dev[0]->pppdev.dev)) |
| goto dmafail2; |
| |
| if (register_netdev(b->dev[1]->pppdev.dev)) |
| goto fail_unit; |
| |
| z8530_describe(dev, "I/O", iobase); |
| dev->active=1; |
| return b; |
| |
| fail_unit: |
| unregister_netdev(b->dev[0]->pppdev.dev); |
| |
| dmafail2: |
| free_dma(dev->chanA.rxdma); |
| dmafail: |
| free_dma(dev->chanA.txdma); |
| fail: |
| free_irq(irq, dev); |
| fail1_1: |
| free_netdev(b->dev[1]->pppdev.dev); |
| fail1_0: |
| free_netdev(b->dev[0]->pppdev.dev); |
| fail2: |
| kfree(b); |
| fail3: |
| release_region(iobase,8); |
| return NULL; |
| } |
| |
| static void __exit slvl_shutdown(struct slvl_board *b) |
| { |
| int u; |
| |
| z8530_shutdown(&b->board); |
| |
| for(u=0; u<2; u++) |
| { |
| struct net_device *d = b->dev[u]->pppdev.dev; |
| unregister_netdev(d); |
| free_netdev(d); |
| } |
| |
| free_irq(b->board.irq, &b->board); |
| free_dma(b->board.chanA.rxdma); |
| free_dma(b->board.chanA.txdma); |
| /* DMA off on the card, drop DTR */ |
| outb(0, b->iobase); |
| release_region(b->iobase, 8); |
| kfree(b); |
| } |
| |
| |
| static int io=0x238; |
| static int txdma=1; |
| static int rxdma=3; |
| static int irq=5; |
| static int slow=0; |
| |
| module_param(io, int, 0); |
| MODULE_PARM_DESC(io, "The I/O base of the Sealevel card"); |
| module_param(txdma, int, 0); |
| MODULE_PARM_DESC(txdma, "Transmit DMA channel"); |
| module_param(rxdma, int, 0); |
| MODULE_PARM_DESC(rxdma, "Receive DMA channel"); |
| module_param(irq, int, 0); |
| MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card"); |
| module_param(slow, bool, 0); |
| MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012"); |
| |
| MODULE_AUTHOR("Alan Cox"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021"); |
| |
| static struct slvl_board *slvl_unit; |
| |
| static int __init slvl_init_module(void) |
| { |
| #ifdef MODULE |
| printk(KERN_INFO "SeaLevel Z85230 Synchronous Driver v 0.02.\n"); |
| printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n"); |
| #endif |
| slvl_unit = slvl_init(io, irq, txdma, rxdma, slow); |
| |
| return slvl_unit ? 0 : -ENODEV; |
| } |
| |
| static void __exit slvl_cleanup_module(void) |
| { |
| if(slvl_unit) |
| slvl_shutdown(slvl_unit); |
| } |
| |
| module_init(slvl_init_module); |
| module_exit(slvl_cleanup_module); |