Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Sealevel Systems 4021 driver. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * (c) Copyright 1999, 2001 Alan Cox | |
10 | * (c) Copyright 2001 Red Hat Inc. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/net.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/init.h> | |
24 | #include <net/arp.h> | |
25 | ||
82729971 | 26 | #include <asm/irq.h> |
1da177e4 LT |
27 | #include <asm/io.h> |
28 | #include <asm/dma.h> | |
29 | #include <asm/byteorder.h> | |
30 | #include <net/syncppp.h> | |
31 | #include "z85230.h" | |
32 | ||
33 | ||
34 | struct slvl_device | |
35 | { | |
36 | void *if_ptr; /* General purpose pointer (used by SPPP) */ | |
37 | struct z8530_channel *chan; | |
38 | struct ppp_device pppdev; | |
39 | int channel; | |
40 | }; | |
41 | ||
42 | ||
43 | struct slvl_board | |
44 | { | |
45 | struct slvl_device *dev[2]; | |
46 | struct z8530_dev board; | |
47 | int iobase; | |
48 | }; | |
49 | ||
50 | /* | |
51 | * Network driver support routines | |
52 | */ | |
53 | ||
54 | /* | |
55 | * Frame receive. Simple for our card as we do sync ppp and there | |
56 | * is no funny garbage involved | |
57 | */ | |
58 | ||
59 | static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb) | |
60 | { | |
61 | /* Drop the CRC - it's not a good idea to try and negotiate it ;) */ | |
62 | skb_trim(skb, skb->len-2); | |
63 | skb->protocol=htons(ETH_P_WAN_PPP); | |
98e399f8 | 64 | skb_reset_mac_header(skb); |
1da177e4 LT |
65 | skb->dev=c->netdevice; |
66 | /* | |
67 | * Send it to the PPP layer. We don't have time to process | |
68 | * it right now. | |
69 | */ | |
70 | netif_rx(skb); | |
71 | c->netdevice->last_rx = jiffies; | |
72 | } | |
73 | ||
74 | /* | |
75 | * We've been placed in the UP state | |
76 | */ | |
77 | ||
78 | static int sealevel_open(struct net_device *d) | |
79 | { | |
80 | struct slvl_device *slvl=d->priv; | |
81 | int err = -1; | |
82 | int unit = slvl->channel; | |
83 | ||
84 | /* | |
85 | * Link layer up. | |
86 | */ | |
87 | ||
88 | switch(unit) | |
89 | { | |
90 | case 0: | |
91 | err=z8530_sync_dma_open(d, slvl->chan); | |
92 | break; | |
93 | case 1: | |
94 | err=z8530_sync_open(d, slvl->chan); | |
95 | break; | |
96 | } | |
97 | ||
98 | if(err) | |
99 | return err; | |
100 | /* | |
101 | * Begin PPP | |
102 | */ | |
103 | err=sppp_open(d); | |
104 | if(err) | |
105 | { | |
106 | switch(unit) | |
107 | { | |
108 | case 0: | |
109 | z8530_sync_dma_close(d, slvl->chan); | |
110 | break; | |
111 | case 1: | |
112 | z8530_sync_close(d, slvl->chan); | |
113 | break; | |
114 | } | |
115 | return err; | |
116 | } | |
117 | ||
118 | slvl->chan->rx_function=sealevel_input; | |
119 | ||
120 | /* | |
121 | * Go go go | |
122 | */ | |
123 | netif_start_queue(d); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int sealevel_close(struct net_device *d) | |
128 | { | |
129 | struct slvl_device *slvl=d->priv; | |
130 | int unit = slvl->channel; | |
131 | ||
132 | /* | |
133 | * Discard new frames | |
134 | */ | |
135 | ||
136 | slvl->chan->rx_function=z8530_null_rx; | |
137 | ||
138 | /* | |
139 | * PPP off | |
140 | */ | |
141 | sppp_close(d); | |
142 | /* | |
143 | * Link layer down | |
144 | */ | |
145 | ||
146 | netif_stop_queue(d); | |
147 | ||
148 | switch(unit) | |
149 | { | |
150 | case 0: | |
151 | z8530_sync_dma_close(d, slvl->chan); | |
152 | break; | |
153 | case 1: | |
154 | z8530_sync_close(d, slvl->chan); | |
155 | break; | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd) | |
161 | { | |
162 | /* struct slvl_device *slvl=d->priv; | |
163 | z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */ | |
164 | return sppp_do_ioctl(d, ifr,cmd); | |
165 | } | |
166 | ||
167 | static struct net_device_stats *sealevel_get_stats(struct net_device *d) | |
168 | { | |
169 | struct slvl_device *slvl=d->priv; | |
170 | if(slvl) | |
171 | return z8530_get_stats(slvl->chan); | |
172 | else | |
173 | return NULL; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Passed PPP frames, fire them downwind. | |
178 | */ | |
179 | ||
180 | static int sealevel_queue_xmit(struct sk_buff *skb, struct net_device *d) | |
181 | { | |
182 | struct slvl_device *slvl=d->priv; | |
183 | return z8530_queue_xmit(slvl->chan, skb); | |
184 | } | |
185 | ||
186 | static int sealevel_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 | ||
195 | static int sealevel_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p) | |
196 | { | |
197 | if (p->tbl->family == AF_INET) { | |
198 | p->neigh_setup = sealevel_neigh_setup; | |
199 | p->ucast_probes = 0; | |
200 | p->mcast_probes = 0; | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static int sealevel_attach(struct net_device *dev) | |
206 | { | |
207 | struct slvl_device *sv = dev->priv; | |
208 | sppp_attach(&sv->pppdev); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static void sealevel_detach(struct net_device *dev) | |
213 | { | |
214 | sppp_detach(dev); | |
215 | } | |
216 | ||
217 | static void slvl_setup(struct net_device *d) | |
218 | { | |
219 | d->open = sealevel_open; | |
220 | d->stop = sealevel_close; | |
221 | d->init = sealevel_attach; | |
222 | d->uninit = sealevel_detach; | |
223 | d->hard_start_xmit = sealevel_queue_xmit; | |
224 | d->get_stats = sealevel_get_stats; | |
225 | d->set_multicast_list = NULL; | |
226 | d->do_ioctl = sealevel_ioctl; | |
227 | d->neigh_setup = sealevel_neigh_setup_dev; | |
228 | d->set_mac_address = NULL; | |
229 | ||
230 | } | |
231 | ||
232 | static inline struct slvl_device *slvl_alloc(int iobase, int irq) | |
233 | { | |
234 | struct net_device *d; | |
235 | struct slvl_device *sv; | |
236 | ||
237 | d = alloc_netdev(sizeof(struct slvl_device), "hdlc%d", | |
238 | slvl_setup); | |
239 | ||
240 | if (!d) | |
241 | return NULL; | |
242 | ||
243 | sv = d->priv; | |
4951704b | 244 | d->ml_priv = sv; |
1da177e4 LT |
245 | sv->if_ptr = &sv->pppdev; |
246 | sv->pppdev.dev = d; | |
247 | d->base_addr = iobase; | |
248 | d->irq = irq; | |
249 | ||
250 | return sv; | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
255 | * Allocate and setup Sealevel board. | |
256 | */ | |
257 | ||
258 | static __init struct slvl_board *slvl_init(int iobase, int irq, | |
259 | int txdma, int rxdma, int slow) | |
260 | { | |
261 | struct z8530_dev *dev; | |
262 | struct slvl_board *b; | |
263 | ||
264 | /* | |
265 | * Get the needed I/O space | |
266 | */ | |
267 | ||
268 | if(!request_region(iobase, 8, "Sealevel 4021")) | |
269 | { | |
270 | printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase); | |
271 | return NULL; | |
272 | } | |
273 | ||
dd00cc48 | 274 | b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL); |
1da177e4 LT |
275 | if(!b) |
276 | goto fail3; | |
277 | ||
1da177e4 LT |
278 | if (!(b->dev[0]= slvl_alloc(iobase, irq))) |
279 | goto fail2; | |
280 | ||
281 | b->dev[0]->chan = &b->board.chanA; | |
282 | b->dev[0]->channel = 0; | |
283 | ||
284 | if (!(b->dev[1] = slvl_alloc(iobase, irq))) | |
285 | goto fail1_0; | |
286 | ||
287 | b->dev[1]->chan = &b->board.chanB; | |
288 | b->dev[1]->channel = 1; | |
289 | ||
290 | dev = &b->board; | |
291 | ||
292 | /* | |
293 | * Stuff in the I/O addressing | |
294 | */ | |
295 | ||
296 | dev->active = 0; | |
297 | ||
298 | b->iobase = iobase; | |
299 | ||
300 | /* | |
301 | * Select 8530 delays for the old board | |
302 | */ | |
303 | ||
304 | if(slow) | |
305 | iobase |= Z8530_PORT_SLEEP; | |
306 | ||
307 | dev->chanA.ctrlio=iobase+1; | |
308 | dev->chanA.dataio=iobase; | |
309 | dev->chanB.ctrlio=iobase+3; | |
310 | dev->chanB.dataio=iobase+2; | |
311 | ||
312 | dev->chanA.irqs=&z8530_nop; | |
313 | dev->chanB.irqs=&z8530_nop; | |
314 | ||
315 | /* | |
316 | * Assert DTR enable DMA | |
317 | */ | |
318 | ||
319 | outb(3|(1<<7), b->iobase+4); | |
320 | ||
321 | ||
322 | /* We want a fast IRQ for this device. Actually we'd like an even faster | |
323 | IRQ ;) - This is one driver RtLinux is made for */ | |
324 | ||
1fb9df5d | 325 | if(request_irq(irq, &z8530_interrupt, IRQF_DISABLED, "SeaLevel", dev)<0) |
1da177e4 LT |
326 | { |
327 | printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq); | |
328 | goto fail1_1; | |
329 | } | |
330 | ||
331 | dev->irq=irq; | |
332 | dev->chanA.private=&b->dev[0]; | |
333 | dev->chanB.private=&b->dev[1]; | |
334 | dev->chanA.netdevice=b->dev[0]->pppdev.dev; | |
335 | dev->chanB.netdevice=b->dev[1]->pppdev.dev; | |
336 | dev->chanA.dev=dev; | |
337 | dev->chanB.dev=dev; | |
338 | ||
339 | dev->chanA.txdma=3; | |
340 | dev->chanA.rxdma=1; | |
341 | if(request_dma(dev->chanA.txdma, "SeaLevel (TX)")!=0) | |
342 | goto fail; | |
343 | ||
344 | if(request_dma(dev->chanA.rxdma, "SeaLevel (RX)")!=0) | |
345 | goto dmafail; | |
346 | ||
347 | disable_irq(irq); | |
348 | ||
349 | /* | |
350 | * Begin normal initialise | |
351 | */ | |
352 | ||
353 | if(z8530_init(dev)!=0) | |
354 | { | |
355 | printk(KERN_ERR "Z8530 series device not found.\n"); | |
356 | enable_irq(irq); | |
357 | goto dmafail2; | |
358 | } | |
359 | if(dev->type==Z85C30) | |
360 | { | |
361 | z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream); | |
362 | z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream); | |
363 | } | |
364 | else | |
365 | { | |
366 | z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230); | |
367 | z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230); | |
368 | } | |
369 | ||
370 | /* | |
371 | * Now we can take the IRQ | |
372 | */ | |
373 | ||
374 | enable_irq(irq); | |
375 | ||
376 | if (register_netdev(b->dev[0]->pppdev.dev)) | |
377 | goto dmafail2; | |
378 | ||
379 | if (register_netdev(b->dev[1]->pppdev.dev)) | |
380 | goto fail_unit; | |
381 | ||
382 | z8530_describe(dev, "I/O", iobase); | |
383 | dev->active=1; | |
384 | return b; | |
385 | ||
386 | fail_unit: | |
387 | unregister_netdev(b->dev[0]->pppdev.dev); | |
388 | ||
389 | dmafail2: | |
390 | free_dma(dev->chanA.rxdma); | |
391 | dmafail: | |
392 | free_dma(dev->chanA.txdma); | |
393 | fail: | |
394 | free_irq(irq, dev); | |
395 | fail1_1: | |
396 | free_netdev(b->dev[1]->pppdev.dev); | |
397 | fail1_0: | |
398 | free_netdev(b->dev[0]->pppdev.dev); | |
399 | fail2: | |
400 | kfree(b); | |
401 | fail3: | |
402 | release_region(iobase,8); | |
403 | return NULL; | |
404 | } | |
405 | ||
406 | static void __exit slvl_shutdown(struct slvl_board *b) | |
407 | { | |
408 | int u; | |
409 | ||
410 | z8530_shutdown(&b->board); | |
411 | ||
412 | for(u=0; u<2; u++) | |
413 | { | |
414 | struct net_device *d = b->dev[u]->pppdev.dev; | |
415 | unregister_netdev(d); | |
416 | free_netdev(d); | |
417 | } | |
418 | ||
419 | free_irq(b->board.irq, &b->board); | |
420 | free_dma(b->board.chanA.rxdma); | |
421 | free_dma(b->board.chanA.txdma); | |
422 | /* DMA off on the card, drop DTR */ | |
423 | outb(0, b->iobase); | |
424 | release_region(b->iobase, 8); | |
425 | kfree(b); | |
426 | } | |
427 | ||
428 | ||
429 | static int io=0x238; | |
430 | static int txdma=1; | |
431 | static int rxdma=3; | |
432 | static int irq=5; | |
433 | static int slow=0; | |
434 | ||
435 | module_param(io, int, 0); | |
436 | MODULE_PARM_DESC(io, "The I/O base of the Sealevel card"); | |
437 | module_param(txdma, int, 0); | |
438 | MODULE_PARM_DESC(txdma, "Transmit DMA channel"); | |
439 | module_param(rxdma, int, 0); | |
440 | MODULE_PARM_DESC(rxdma, "Receive DMA channel"); | |
441 | module_param(irq, int, 0); | |
442 | MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card"); | |
443 | module_param(slow, bool, 0); | |
444 | MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012"); | |
445 | ||
446 | MODULE_AUTHOR("Alan Cox"); | |
447 | MODULE_LICENSE("GPL"); | |
448 | MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021"); | |
449 | ||
450 | static struct slvl_board *slvl_unit; | |
451 | ||
452 | static int __init slvl_init_module(void) | |
453 | { | |
454 | #ifdef MODULE | |
455 | printk(KERN_INFO "SeaLevel Z85230 Synchronous Driver v 0.02.\n"); | |
456 | printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n"); | |
457 | #endif | |
458 | slvl_unit = slvl_init(io, irq, txdma, rxdma, slow); | |
459 | ||
460 | return slvl_unit ? 0 : -ENODEV; | |
461 | } | |
462 | ||
463 | static void __exit slvl_cleanup_module(void) | |
464 | { | |
465 | if(slvl_unit) | |
466 | slvl_shutdown(slvl_unit); | |
467 | } | |
468 | ||
469 | module_init(slvl_init_module); | |
470 | module_exit(slvl_cleanup_module); |