WAN: Convert Zilog-based drivers to generic HDLC

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

1 files changed, 142 insertions, 219 deletions

diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
index 44a89df1b8bf..c0235844a4d5 100644
--- a/drivers/net/wan/sealevel.c
+++ b/drivers/net/wan/sealevel.c
@@ -8,6 +8,7 @@
  *
  *      (c) Copyright 1999, 2001 Alan Cox
  *      (c) Copyright 2001 Red Hat Inc.
+ *      Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
  *
  */
 
@@ -19,6 +20,7 @@
 #include <linux/netdevice.h>
 #include <linux/if_arp.h>
 #include <linux/delay.h>
+#include <linux/hdlc.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <net/arp.h>
@@ -27,22 +29,19 @@
 #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 slvl_device dev[2];
         struct z8530_dev board;
         int iobase;
 };
@@ -51,72 +50,69 @@ struct slvl_board
  *      Network driver support routines
  */
 
+static inline struct slvl_device* dev_to_chan(struct net_device *dev)
+{
+        return (struct slvl_device *)dev_to_hdlc(dev)->priv;
+}
+
 /*
- *      Frame receive. Simple for our card as we do sync ppp and there
+ *      Frame receive. Simple for our card as we do HDLC 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_trim(skb, skb->len - 2);
+        skb->protocol = hdlc_type_trans(skb, c->netdevice);
         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.
-         */
+        skb->dev = c->netdevice;
         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;
+        struct slvl_device *slvl = dev_to_chan(d);
         int err = -1;
         int unit = slvl->channel;
-        
+
         /*
-         *      Link layer up. 
+         *      Link layer up.
          */
 
-        switch(unit)
+        switch (unit)
         {
                 case 0:
-                        err=z8530_sync_dma_open(d, slvl->chan);
+                        err = z8530_sync_dma_open(d, slvl->chan);
                         break;
                 case 1:
-                        err=z8530_sync_open(d, slvl->chan);
+                        err = z8530_sync_open(d, slvl->chan);
                         break;
         }
-        
-        if(err)
+
+        if (err)
                 return err;
-        /*
-         *      Begin PPP
-         */
-        err=sppp_open(d);
-        if(err)
-        {
-                switch(unit)
-                {
+
+        err = hdlc_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;
-        
+
+        slvl->chan->rx_function = sealevel_input;
+
         /*
          *      Go go go
          */
@@ -126,26 +122,19 @@ static int sealevel_open(struct net_device *d)
 
 static int sealevel_close(struct net_device *d)
 {
-        struct slvl_device *slvl=d->priv;
+        struct slvl_device *slvl = dev_to_chan(d);
         int unit = slvl->channel;
-        
+
         /*
          *      Discard new frames
          */
-        
-        slvl->chan->rx_function=z8530_null_rx;
-                
-        /*
-         *      PPP off
-         */
-        sppp_close(d);
-        /*
-         *      Link layer down
-         */
 
+        slvl->chan->rx_function = z8530_null_rx;
+
+        hdlc_close(d);
         netif_stop_queue(d);
-                
-        switch(unit)
+
+        switch (unit)
         {
                 case 0:
                         z8530_sync_dma_close(d, slvl->chan);
@@ -159,210 +148,153 @@ static int sealevel_close(struct net_device *d)
 
 static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
 {
-        /* struct slvl_device *slvl=d->priv;
+        /* struct slvl_device *slvl=dev_to_chan(d);
            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;
+        return hdlc_ioctl(d, ifr, cmd);
 }
 
 /*
- *      Passed PPP frames, fire them downwind.
+ *      Passed network 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);
+        return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
 }
 
-static int sealevel_neigh_setup(struct neighbour *n)
+static int sealevel_attach(struct net_device *dev, unsigned short encoding,
+                           unsigned short parity)
 {
-        if (n->nud_state == NUD_NONE) {
-                n->ops = &arp_broken_ops;
-                n->output = n->ops->output;
-        }
-        return 0;
+        if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
+                return 0;
+        return -EINVAL;
 }
 
-static int sealevel_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
+static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
 {
-        if (p->tbl->family == AF_INET) {
-                p->neigh_setup = sealevel_neigh_setup;
-                p->ucast_probes = 0;
-                p->mcast_probes = 0;
+        struct net_device *dev = alloc_hdlcdev(sv);
+        if (!dev)
+                return -1;
+
+        dev_to_hdlc(dev)->attach = sealevel_attach;
+        dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
+        dev->open = sealevel_open;
+        dev->stop = sealevel_close;
+        dev->do_ioctl = sealevel_ioctl;
+        dev->base_addr = iobase;
+        dev->irq = irq;
+
+        if (register_hdlc_device(dev)) {
+                printk(KERN_ERR "sealevel: unable to register HDLC device\n");
+                free_netdev(dev);
+                return -1;
         }
-        return 0;
-}
 
-static int sealevel_attach(struct net_device *dev)
-{
-        struct slvl_device *sv = dev->priv;
-        sppp_attach(&sv->pppdev);
+        sv->chan->netdevice = dev;
         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, 
+
+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);
+        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 = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
+        if (!b)
+                goto err_kzalloc;
 
-        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[0].chan = &b->board.chanA;
+        b->dev[0].channel = 0;
 
-        b->dev[1]->chan = &b->board.chanB;
-        b->dev[1]->channel = 1;
+        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)
+
+        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;
-        
+
+        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);    
-        
+
+        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)
-        {
+
+        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;
+                goto err_request_irq;
         }
-        
-        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;
-        
+
+        dev->irq = irq;
+        dev->chanA.private = &b->dev[0];
+        dev->chanB.private = &b->dev[1];
+        dev->chanA.dev = dev;
+        dev->chanB.dev = dev;
+
+        dev->chanA.txdma = 3;
+        dev->chanA.rxdma = 1;
+        if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
+                goto err_dma_tx;
+
+        if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
+                goto err_dma_rx;
+
         disable_irq(irq);
-                
+
         /*
          *      Begin normal initialise
          */
-         
-        if(z8530_init(dev)!=0)
-        {
+
+        if (z8530_init(dev) != 0) {
                 printk(KERN_ERR "Z8530 series device not found.\n");
                 enable_irq(irq);
-                goto dmafail2;
+                goto free_hw;
         }
-        if(dev->type==Z85C30)
-        {
+        if (dev->type == Z85C30) {
                 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
                 z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
-        }
-        else
-        {
+        } else {
                 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
                 z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
         }
@@ -370,36 +302,31 @@ static __init struct slvl_board *slvl_init(int iobase, int irq,
         /*
          *      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;
+        if (slvl_setup(&b->dev[0], iobase, irq))
+                goto free_hw;
+        if (slvl_setup(&b->dev[1], iobase, irq))
+                goto free_netdev0;
 
         z8530_describe(dev, "I/O", iobase);
-        dev->active=1;
+        dev->active = 1;
         return b;
 
-fail_unit:
-        unregister_netdev(b->dev[0]->pppdev.dev);
-        
-dmafail2:
+free_netdev0:
+        unregister_hdlc_device(b->dev[0].chan->netdevice);
+        free_netdev(b->dev[0].chan->netdevice);
+free_hw:
         free_dma(dev->chanA.rxdma);
-dmafail:
+err_dma_rx:
         free_dma(dev->chanA.txdma);
-fail:
+err_dma_tx:
         free_irq(irq, dev);
-fail1_1:
-        free_netdev(b->dev[1]->pppdev.dev);
-fail1_0:
-        free_netdev(b->dev[0]->pppdev.dev);
-fail2:
+err_request_irq:
         kfree(b);
-fail3:
-        release_region(iobase,8);
+err_kzalloc:
+        release_region(iobase, 8);
         return NULL;
 }
 
@@ -408,14 +335,14 @@ static void __exit slvl_shutdown(struct slvl_board *b)
         int u;
 
         z8530_shutdown(&b->board);
-        
-        for(u=0; u<2; u++)
+
+        for (u = 0; u < 2; u++)
         {
-                struct net_device *d = b->dev[u]->pppdev.dev;
-                unregister_netdev(d);
+                struct net_device *d = b->dev[u].chan->netdevice;
+                unregister_hdlc_device(d);
                 free_netdev(d);
         }
-        
+
         free_irq(b->board.irq, &b->board);
         free_dma(b->board.chanA.rxdma);
         free_dma(b->board.chanA.txdma);
@@ -451,10 +378,6 @@ 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;