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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Comtrol SV11 card driver
3 *
4 * This is a slightly odd Z85230 synchronous driver. All you need to
5 * know basically is
6 *
7 * Its a genuine Z85230
8 *
9 * It supports DMA using two DMA channels in SYNC mode. The driver doesn't
10 * use these facilities
11 *
12 * The control port is at io+1, the data at io+3 and turning off the DMA
13 * is done by writing 0 to io+4
14 *
15 * The hardware does the bus handling to avoid the need for delays between
16 * touching control registers.
17 *
18 * Port B isnt wired (why - beats me)
19 */
20
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/mm.h>
24#include <linux/net.h>
25#include <linux/skbuff.h>
26#include <linux/netdevice.h>
27#include <linux/if_arp.h>
28#include <linux/delay.h>
29#include <linux/ioport.h>
30#include <net/arp.h>
31
Al Viro82729972005-12-06 05:53:04 -050032#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/io.h>
34#include <asm/dma.h>
35#include <asm/byteorder.h>
36#include <net/syncppp.h>
37#include "z85230.h"
38
39static int dma;
40
41struct sv11_device
42{
43 void *if_ptr; /* General purpose pointer (used by SPPP) */
44 struct z8530_dev sync;
45 struct ppp_device netdev;
46};
47
48/*
49 * Network driver support routines
50 */
51
52/*
53 * Frame receive. Simple for our card as we do sync ppp and there
54 * is no funny garbage involved
55 */
56
57static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
58{
59 /* Drop the CRC - it's not a good idea to try and negotiate it ;) */
60 skb_trim(skb, skb->len-2);
61 skb->protocol=__constant_htons(ETH_P_WAN_PPP);
Arnaldo Carvalho de Melo98e399f2007-03-19 15:33:04 -070062 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 skb->dev=c->netdevice;
64 /*
65 * Send it to the PPP layer. We don't have time to process
66 * it right now.
67 */
68 netif_rx(skb);
69 c->netdevice->last_rx = jiffies;
70}
71
72/*
73 * We've been placed in the UP state
74 */
75
76static int hostess_open(struct net_device *d)
77{
78 struct sv11_device *sv11=d->priv;
79 int err = -1;
80
81 /*
82 * Link layer up
83 */
84 switch(dma)
85 {
86 case 0:
87 err=z8530_sync_open(d, &sv11->sync.chanA);
88 break;
89 case 1:
90 err=z8530_sync_dma_open(d, &sv11->sync.chanA);
91 break;
92 case 2:
93 err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
94 break;
95 }
96
97 if(err)
98 return err;
99 /*
100 * Begin PPP
101 */
102 err=sppp_open(d);
103 if(err)
104 {
105 switch(dma)
106 {
107 case 0:
108 z8530_sync_close(d, &sv11->sync.chanA);
109 break;
110 case 1:
111 z8530_sync_dma_close(d, &sv11->sync.chanA);
112 break;
113 case 2:
114 z8530_sync_txdma_close(d, &sv11->sync.chanA);
115 break;
116 }
117 return err;
118 }
119 sv11->sync.chanA.rx_function=hostess_input;
120
121 /*
122 * Go go go
123 */
124
125 netif_start_queue(d);
126 return 0;
127}
128
129static int hostess_close(struct net_device *d)
130{
131 struct sv11_device *sv11=d->priv;
132 /*
133 * Discard new frames
134 */
135 sv11->sync.chanA.rx_function=z8530_null_rx;
136 /*
137 * PPP off
138 */
139 sppp_close(d);
140 /*
141 * Link layer down
142 */
143 netif_stop_queue(d);
144
145 switch(dma)
146 {
147 case 0:
148 z8530_sync_close(d, &sv11->sync.chanA);
149 break;
150 case 1:
151 z8530_sync_dma_close(d, &sv11->sync.chanA);
152 break;
153 case 2:
154 z8530_sync_txdma_close(d, &sv11->sync.chanA);
155 break;
156 }
157 return 0;
158}
159
160static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
161{
162 /* struct sv11_device *sv11=d->priv;
163 z8530_ioctl(d,&sv11->sync.chanA,ifr,cmd) */
164 return sppp_do_ioctl(d, ifr,cmd);
165}
166
167static struct net_device_stats *hostess_get_stats(struct net_device *d)
168{
169 struct sv11_device *sv11=d->priv;
170 if(sv11)
171 return z8530_get_stats(&sv11->sync.chanA);
172 else
173 return NULL;
174}
175
176/*
177 * Passed PPP frames, fire them downwind.
178 */
179
180static int hostess_queue_xmit(struct sk_buff *skb, struct net_device *d)
181{
182 struct sv11_device *sv11=d->priv;
183 return z8530_queue_xmit(&sv11->sync.chanA, skb);
184}
185
186static int hostess_neigh_setup(struct neighbour *n)
187{
188 if (n->nud_state == NUD_NONE) {
189 n->ops = &arp_broken_ops;
190 n->output = n->ops->output;
191 }
192 return 0;
193}
194
195static int hostess_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
196{
197 if (p->tbl->family == AF_INET) {
198 p->neigh_setup = hostess_neigh_setup;
199 p->ucast_probes = 0;
200 p->mcast_probes = 0;
201 }
202 return 0;
203}
204
205static void sv11_setup(struct net_device *dev)
206{
207 dev->open = hostess_open;
208 dev->stop = hostess_close;
209 dev->hard_start_xmit = hostess_queue_xmit;
210 dev->get_stats = hostess_get_stats;
211 dev->do_ioctl = hostess_ioctl;
212 dev->neigh_setup = hostess_neigh_setup_dev;
213}
214
215/*
216 * Description block for a Comtrol Hostess SV11 card
217 */
218
219static struct sv11_device *sv11_init(int iobase, int irq)
220{
221 struct z8530_dev *dev;
222 struct sv11_device *sv;
223
224 /*
225 * Get the needed I/O space
226 */
227
228 if(!request_region(iobase, 8, "Comtrol SV11"))
229 {
230 printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", iobase);
231 return NULL;
232 }
233
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800234 sv = kmalloc(sizeof(struct sv11_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 if(!sv)
236 goto fail3;
237
238 memset(sv, 0, sizeof(*sv));
239 sv->if_ptr=&sv->netdev;
240
241 sv->netdev.dev = alloc_netdev(0, "hdlc%d", sv11_setup);
242 if(!sv->netdev.dev)
243 goto fail2;
244
245 SET_MODULE_OWNER(sv->netdev.dev);
246
247 dev=&sv->sync;
248
249 /*
250 * Stuff in the I/O addressing
251 */
252
253 dev->active = 0;
254
255 dev->chanA.ctrlio=iobase+1;
256 dev->chanA.dataio=iobase+3;
257 dev->chanB.ctrlio=-1;
258 dev->chanB.dataio=-1;
259 dev->chanA.irqs=&z8530_nop;
260 dev->chanB.irqs=&z8530_nop;
261
262 outb(0, iobase+4); /* DMA off */
263
264 /* We want a fast IRQ for this device. Actually we'd like an even faster
265 IRQ ;) - This is one driver RtLinux is made for */
266
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700267 if(request_irq(irq, &z8530_interrupt, IRQF_DISABLED, "Hostess SV11", dev)<0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 {
269 printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
270 goto fail1;
271 }
272
273 dev->irq=irq;
274 dev->chanA.private=sv;
275 dev->chanA.netdevice=sv->netdev.dev;
276 dev->chanA.dev=dev;
277 dev->chanB.dev=dev;
278
279 if(dma)
280 {
281 /*
282 * You can have DMA off or 1 and 3 thats the lot
283 * on the Comtrol.
284 */
285 dev->chanA.txdma=3;
286 dev->chanA.rxdma=1;
287 outb(0x03|0x08, iobase+4); /* DMA on */
288 if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
289 goto fail;
290
291 if(dma==1)
292 {
293 if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
294 goto dmafail;
295 }
296 }
297
298 /* Kill our private IRQ line the hostess can end up chattering
299 until the configuration is set */
300 disable_irq(irq);
301
302 /*
303 * Begin normal initialise
304 */
305
306 if(z8530_init(dev)!=0)
307 {
308 printk(KERN_ERR "Z8530 series device not found.\n");
309 enable_irq(irq);
310 goto dmafail2;
311 }
312 z8530_channel_load(&dev->chanB, z8530_dead_port);
313 if(dev->type==Z85C30)
314 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
315 else
316 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
317
318 enable_irq(irq);
319
320
321 /*
322 * Now we can take the IRQ
323 */
324 if(dev_alloc_name(dev->chanA.netdevice,"hdlc%d")>=0)
325 {
326 struct net_device *d=dev->chanA.netdevice;
327
328 /*
329 * Initialise the PPP components
330 */
331 sppp_attach(&sv->netdev);
332
333 /*
334 * Local fields
335 */
336
337 d->base_addr = iobase;
338 d->irq = irq;
339 d->priv = sv;
340
341 if(register_netdev(d))
342 {
343 printk(KERN_ERR "%s: unable to register device.\n",
344 d->name);
345 sppp_detach(d);
346 goto dmafail2;
347 }
348
349 z8530_describe(dev, "I/O", iobase);
350 dev->active=1;
351 return sv;
352 }
353dmafail2:
354 if(dma==1)
355 free_dma(dev->chanA.rxdma);
356dmafail:
357 if(dma)
358 free_dma(dev->chanA.txdma);
359fail:
360 free_irq(irq, dev);
361fail1:
362 free_netdev(sv->netdev.dev);
363fail2:
364 kfree(sv);
365fail3:
366 release_region(iobase,8);
367 return NULL;
368}
369
370static void sv11_shutdown(struct sv11_device *dev)
371{
372 sppp_detach(dev->netdev.dev);
373 unregister_netdev(dev->netdev.dev);
374 z8530_shutdown(&dev->sync);
375 free_irq(dev->sync.irq, dev);
376 if(dma)
377 {
378 if(dma==1)
379 free_dma(dev->sync.chanA.rxdma);
380 free_dma(dev->sync.chanA.txdma);
381 }
382 release_region(dev->sync.chanA.ctrlio-1, 8);
383 free_netdev(dev->netdev.dev);
384 kfree(dev);
385}
386
387#ifdef MODULE
388
389static int io=0x200;
390static int irq=9;
391
392module_param(io, int, 0);
393MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
394module_param(dma, int, 0);
395MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
396module_param(irq, int, 0);
397MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
398
399MODULE_AUTHOR("Alan Cox");
400MODULE_LICENSE("GPL");
401MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
402
403static struct sv11_device *sv11_unit;
404
405int init_module(void)
406{
407 printk(KERN_INFO "SV-11 Z85230 Synchronous Driver v 0.03.\n");
408 printk(KERN_INFO "(c) Copyright 2001, Red Hat Inc.\n");
409 if((sv11_unit=sv11_init(io,irq))==NULL)
410 return -ENODEV;
411 return 0;
412}
413
414void cleanup_module(void)
415{
416 if(sv11_unit)
417 sv11_shutdown(sv11_unit);
418}
419
420#endif
421