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-rw-r--r--drivers/net/sealevel.c471
1 files changed, 471 insertions, 0 deletions
diff --git a/drivers/net/sealevel.c b/drivers/net/sealevel.c
new file mode 100644
index 000000000..03e90828e
--- /dev/null
+++ b/drivers/net/sealevel.c
@@ -0,0 +1,471 @@
+#define LINUX_21
+
+/*
+ * 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 Building Number Three Ltd
+ *
+ */
+
+#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 "syncppp.h"
+#include "z85230.h"
+
+
+struct slvl_device
+{
+ struct z8530_channel *chan;
+ struct ppp_device netdev;
+ char name[16];
+ 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 - its 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 dont have time to process
+ * it right now.
+ */
+ netif_rx(skb);
+}
+
+/*
+ * We've been placed in the UP state
+ */
+
+static int sealevel_open(struct 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
+ */
+ d->tbusy=0;
+ MOD_INC_USE_COUNT;
+ return 0;
+}
+
+static int sealevel_close(struct 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
+ */
+ d->tbusy=1;
+
+ switch(unit)
+ {
+ case 0:
+ z8530_sync_dma_close(d, slvl->chan);
+ break;
+ case 1:
+ z8530_sync_close(d, slvl->chan);
+ break;
+ }
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+static int sealevel_ioctl(struct 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 enet_statistics *sealevel_get_stats(struct 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 device *d)
+{
+ struct slvl_device *slvl=d->priv;
+ return z8530_queue_xmit(slvl->chan, skb);
+}
+
+#ifdef LINUX_21
+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 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;
+}
+
+#else
+
+static int return_0(struct device *d)
+{
+ return 0;
+}
+
+#endif
+
+/*
+ * Description block for a Comtrol Hostess SV11 card
+ */
+
+static struct slvl_board *slvl_init(int iobase, int irq, int txdma, int rxdma, int slow)
+{
+ struct z8530_dev *dev;
+ struct slvl_device *sv;
+ struct slvl_board *b;
+
+ int i;
+ unsigned long flags;
+ int u;
+
+ /*
+ * Get the needed I/O space
+ */
+
+ if(check_region(iobase, 8))
+ {
+ printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase);
+ return NULL;
+ }
+ request_region(iobase, 8, "Sealevel 4021");
+
+ b=(struct slvl_board *)kmalloc(sizeof(struct slvl_board), GFP_KERNEL);
+ if(!b)
+ goto fail3;
+
+ memset(b, 0, sizeof(*sv));
+
+ b->dev[0].chan = &b->board.chanA;
+ b->dev[1].chan = &b->board.chanB;
+
+ 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 fail2;
+ }
+
+ dev->irq=irq;
+ dev->chanA.private=&b->dev[0];
+ dev->chanB.private=&b->dev[1];
+ dev->chanA.netdevice=&b->dev[0].netdev.dev;
+ dev->chanB.netdevice=&b->dev[1].netdev.dev;
+ dev->chanA.dev=dev;
+ dev->chanB.dev=dev;
+ dev->name=b->dev[0].name;
+
+ 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;
+
+ save_flags(flags);
+ cli();
+
+ /*
+ * Begin normal initialise
+ */
+
+ if(z8530_init(dev)!=0)
+ {
+ printk(KERN_ERR "Z8530 series device not found.\n");
+ 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
+ */
+
+ restore_flags(flags);
+
+ for(u=0; u<2; u++)
+ {
+ sv=&b->dev[u];
+ sv->channel = u;
+
+ for(i=0;i<999;i++)
+ {
+ sprintf(sv->name,"hdlc%d", i);
+ if(dev_get(sv->name)==NULL)
+ {
+ struct device *d=sv->chan->netdevice;
+
+ /*
+ * Initialise the PPP components
+ */
+ sppp_attach(&sv->netdev);
+
+ /*
+ * Local fields
+ */
+ sprintf(sv->name,"hdlc%d", i);
+
+ d->name = sv->name;
+ d->base_addr = iobase;
+ d->irq = irq;
+ d->priv = sv;
+ d->init = NULL;
+
+ d->open = sealevel_open;
+ d->stop = sealevel_close;
+ d->hard_start_xmit = sealevel_queue_xmit;
+ d->get_stats = sealevel_get_stats;
+ d->set_multicast_list = NULL;
+ d->do_ioctl = sealevel_ioctl;
+#ifdef LINUX_21
+ d->neigh_setup = sealevel_neigh_setup_dev;
+ dev_init_buffers(d);
+#else
+ d->init = return_0;
+#endif
+ d->set_mac_address = NULL;
+
+ if(register_netdev(d)==-1)
+ {
+ printk(KERN_ERR "%s: unable to register device.\n",
+ sv->name);
+ goto fail_unit;
+ }
+
+ break;
+ }
+ }
+ }
+ z8530_describe(dev, "I/O", iobase);
+ dev->active=1;
+ return b;
+
+fail_unit:
+ if(u==1)
+ unregister_netdev(b->dev[0].chan->netdevice);
+
+dmafail2:
+ free_dma(dev->chanA.rxdma);
+dmafail:
+ free_dma(dev->chanA.txdma);
+fail:
+ free_irq(irq, dev);
+fail2:
+ kfree(b);
+fail3:
+ release_region(iobase,8);
+ return NULL;
+}
+
+static void slvl_shutdown(struct slvl_board *b)
+{
+ int u;
+
+ z8530_shutdown(&b->board);
+
+ for(u=0; u<2; u++)
+ {
+ sppp_detach(&b->dev[u].netdev.dev);
+ unregister_netdev(&b->dev[u].netdev.dev);
+ }
+
+ 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);
+}
+
+#ifdef MODULE
+
+static int io=0x238;
+static int txdma=1;
+static int rxdma=3;
+static int irq=5;
+static int slow=0;
+
+#ifdef LINUX_21
+MODULE_PARM(io,"i");
+MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
+MODULE_PARM(txdma,"i");
+MODULE_PARM_DESC(txdma, "Transmit DMA channel");
+MODULE_PARM(rxdma,"i");
+MODULE_PARM_DESC(rxdma, "Receive DMA channel");
+MODULE_PARM(irq,"i");
+MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
+MODULE_PARM(slow,"i");
+MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
+
+MODULE_AUTHOR("Bulding Number Three Ltd");
+MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
+#endif
+
+static struct slvl_board *slvl_unit;
+
+int init_module(void)
+{
+ printk(KERN_INFO "SeaLevel Z85230 Synchronous Driver v 0.01.\n");
+ printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n");
+ if((slvl_unit=slvl_init(io,irq, txdma, rxdma, slow))==NULL)
+ return -ENODEV;
+ return 0;
+}
+
+void cleanup_module(void)
+{
+ if(slvl_unit)
+ slvl_shutdown(slvl_unit);
+}
+
+#endif
+
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