1 files changed, 469 insertions, 0 deletions

diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
new file mode 100644
index 000000000000..5380ddfcd7d5
--- /dev/null
+++ b/drivers/net/wan/sealevel.c
@@ -0,0 +1,469 @@
+/*
+ *      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/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->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 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;
+        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 = kmalloc(sizeof(struct slvl_board), GFP_KERNEL);
+        if(!b)
+                goto fail3;
+
+        memset(b, 0, sizeof(*b));
+        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, SA_INTERRUPT, "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);