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27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/moduleparam.h>
30#include <linux/ioport.h>
31#include <linux/delay.h>
32#include <linux/netdevice.h>
33#include <linux/bootmem.h>
34#include <linux/init.h>
35#include <linux/interrupt.h>
36#include <asm/io.h>
37#include <linux/arcdevice.h>
38
39
40#define VERSION "arcnet: RIM I (entirely mem-mapped) support\n"
41
42
43
44
45static int arcrimi_probe(struct net_device *dev);
46static int arcrimi_found(struct net_device *dev);
47static void arcrimi_command(struct net_device *dev, int command);
48static int arcrimi_status(struct net_device *dev);
49static void arcrimi_setmask(struct net_device *dev, int mask);
50static int arcrimi_reset(struct net_device *dev, int really_reset);
51static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
52 void *buf, int count);
53static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
54 void *buf, int count);
55
56
57
58
59#define BUFFER_SIZE (512)
60#define MIRROR_SIZE (BUFFER_SIZE*4)
61
62
63#define _INTMASK (ioaddr+0)
64#define _STATUS (ioaddr+0)
65#define _COMMAND (ioaddr+1)
66#define _RESET (ioaddr+8)
67#define _MEMDATA (ioaddr+12)
68#define _ADDR_HI (ioaddr+15)
69#define _ADDR_LO (ioaddr+14)
70#define _CONFIG (ioaddr+2)
71
72#undef ASTATUS
73#undef ACOMMAND
74#undef AINTMASK
75
76#define ASTATUS() readb(_STATUS)
77#define ACOMMAND(cmd) writeb((cmd),_COMMAND)
78#define AINTMASK(msk) writeb((msk),_INTMASK)
79#define SETCONF() writeb(lp->config,_CONFIG)
80
81
82
83
84
85
86
87static int __init arcrimi_probe(struct net_device *dev)
88{
89 BUGLVL(D_NORMAL) printk(VERSION);
90 BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");
91
92 BUGLVL(D_NORMAL) printk("Given: node %02Xh, shmem %lXh, irq %d\n",
93 dev->dev_addr[0], dev->mem_start, dev->irq);
94
95 if (dev->mem_start <= 0 || dev->irq <= 0) {
96 BUGLVL(D_NORMAL) printk("No autoprobe for RIM I; you "
97 "must specify the shmem and irq!\n");
98 return -ENODEV;
99 }
100 if (dev->dev_addr[0] == 0) {
101 BUGLVL(D_NORMAL) printk("You need to specify your card's station "
102 "ID!\n");
103 return -ENODEV;
104 }
105
106
107
108
109
110
111 if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
112 BUGLVL(D_NORMAL) printk("Card memory already allocated\n");
113 return -ENODEV;
114 }
115 return arcrimi_found(dev);
116}
117
118static int check_mirror(unsigned long addr, size_t size)
119{
120 void __iomem *p;
121 int res = -1;
122
123 if (!request_mem_region(addr, size, "arcnet (90xx)"))
124 return -1;
125
126 p = ioremap(addr, size);
127 if (p) {
128 if (readb(p) == TESTvalue)
129 res = 1;
130 else
131 res = 0;
132 iounmap(p);
133 }
134
135 release_mem_region(addr, size);
136 return res;
137}
138
139
140
141
142
143static int __init arcrimi_found(struct net_device *dev)
144{
145 struct arcnet_local *lp;
146 unsigned long first_mirror, last_mirror, shmem;
147 void __iomem *p;
148 int mirror_size;
149 int err;
150
151 p = ioremap(dev->mem_start, MIRROR_SIZE);
152 if (!p) {
153 release_mem_region(dev->mem_start, MIRROR_SIZE);
154 BUGMSG(D_NORMAL, "Can't ioremap\n");
155 return -ENODEV;
156 }
157
158
159 if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
160 iounmap(p);
161 release_mem_region(dev->mem_start, MIRROR_SIZE);
162 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
163 return -ENODEV;
164 }
165
166 shmem = dev->mem_start;
167 writeb(TESTvalue, p);
168 writeb(dev->dev_addr[0], p + 1);
169
170
171
172
173
174
175
176 mirror_size = MIRROR_SIZE;
177 if (readb(p) == TESTvalue &&
178 check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
179 check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
180 mirror_size = 2 * MIRROR_SIZE;
181
182 first_mirror = shmem - mirror_size;
183 while (check_mirror(first_mirror, mirror_size) == 1)
184 first_mirror -= mirror_size;
185 first_mirror += mirror_size;
186
187 last_mirror = shmem + mirror_size;
188 while (check_mirror(last_mirror, mirror_size) == 1)
189 last_mirror += mirror_size;
190 last_mirror -= mirror_size;
191
192 dev->mem_start = first_mirror;
193 dev->mem_end = last_mirror + MIRROR_SIZE - 1;
194
195
196
197 lp = netdev_priv(dev);
198 lp->card_name = "RIM I";
199 lp->hw.command = arcrimi_command;
200 lp->hw.status = arcrimi_status;
201 lp->hw.intmask = arcrimi_setmask;
202 lp->hw.reset = arcrimi_reset;
203 lp->hw.owner = THIS_MODULE;
204 lp->hw.copy_to_card = arcrimi_copy_to_card;
205 lp->hw.copy_from_card = arcrimi_copy_from_card;
206
207
208
209
210
211
212
213 iounmap(p);
214 release_mem_region(shmem, MIRROR_SIZE);
215 if (!request_mem_region(dev->mem_start,
216 dev->mem_end - dev->mem_start + 1,
217 "arcnet (90xx)")) {
218 BUGMSG(D_NORMAL, "Card memory already allocated\n");
219 goto err_free_irq;
220 }
221
222 lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
223 if (!lp->mem_start) {
224 BUGMSG(D_NORMAL, "Can't remap device memory!\n");
225 goto err_release_mem;
226 }
227
228
229 dev->dev_addr[0] = readb(lp->mem_start + 1);
230
231 BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
232 "ShMem %lXh (%ld*%d bytes).\n",
233 dev->dev_addr[0],
234 dev->irq, dev->mem_start,
235 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
236
237 err = register_netdev(dev);
238 if (err)
239 goto err_unmap;
240
241 return 0;
242
243err_unmap:
244 iounmap(lp->mem_start);
245err_release_mem:
246 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
247err_free_irq:
248 free_irq(dev->irq, dev);
249 return -EIO;
250}
251
252
253
254
255
256
257
258
259
260
261static int arcrimi_reset(struct net_device *dev, int really_reset)
262{
263 struct arcnet_local *lp = netdev_priv(dev);
264 void __iomem *ioaddr = lp->mem_start + 0x800;
265
266 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
267
268 if (really_reset) {
269 writeb(TESTvalue, ioaddr - 0x800);
270 return 0;
271 }
272 ACOMMAND(CFLAGScmd | RESETclear);
273 ACOMMAND(CFLAGScmd | CONFIGclear);
274
275
276 ACOMMAND(CONFIGcmd | EXTconf);
277
278
279 return 0;
280}
281
282static void arcrimi_setmask(struct net_device *dev, int mask)
283{
284 struct arcnet_local *lp = netdev_priv(dev);
285 void __iomem *ioaddr = lp->mem_start + 0x800;
286
287 AINTMASK(mask);
288}
289
290static int arcrimi_status(struct net_device *dev)
291{
292 struct arcnet_local *lp = netdev_priv(dev);
293 void __iomem *ioaddr = lp->mem_start + 0x800;
294
295 return ASTATUS();
296}
297
298static void arcrimi_command(struct net_device *dev, int cmd)
299{
300 struct arcnet_local *lp = netdev_priv(dev);
301 void __iomem *ioaddr = lp->mem_start + 0x800;
302
303 ACOMMAND(cmd);
304}
305
306static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
307 void *buf, int count)
308{
309 struct arcnet_local *lp = netdev_priv(dev);
310 void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
311 TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
312}
313
314
315static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
316 void *buf, int count)
317{
318 struct arcnet_local *lp = netdev_priv(dev);
319 void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
320 TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
321}
322
323static int node;
324static int io;
325static int irq;
326static char device[9];
327
328module_param(node, int, 0);
329module_param(io, int, 0);
330module_param(irq, int, 0);
331module_param_string(device, device, sizeof(device), 0);
332MODULE_LICENSE("GPL");
333
334static struct net_device *my_dev;
335
336static int __init arc_rimi_init(void)
337{
338 struct net_device *dev;
339
340 dev = alloc_arcdev(device);
341 if (!dev)
342 return -ENOMEM;
343
344 if (node && node != 0xff)
345 dev->dev_addr[0] = node;
346
347 dev->mem_start = io;
348 dev->irq = irq;
349 if (dev->irq == 2)
350 dev->irq = 9;
351
352 if (arcrimi_probe(dev)) {
353 free_netdev(dev);
354 return -EIO;
355 }
356
357 my_dev = dev;
358 return 0;
359}
360
361static void __exit arc_rimi_exit(void)
362{
363 struct net_device *dev = my_dev;
364 struct arcnet_local *lp = netdev_priv(dev);
365
366 unregister_netdev(dev);
367 iounmap(lp->mem_start);
368 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
369 free_irq(dev->irq, dev);
370 free_netdev(dev);
371}
372
373#ifndef MODULE
374static int __init arcrimi_setup(char *s)
375{
376 int ints[8];
377 s = get_options(s, 8, ints);
378 if (!ints[0])
379 return 1;
380 switch (ints[0]) {
381 default:
382 printk("arcrimi: Too many arguments.\n");
383 case 3:
384 node = ints[3];
385 case 2:
386 irq = ints[2];
387 case 1:
388 io = ints[1];
389 }
390 if (*s)
391 snprintf(device, sizeof(device), "%s", s);
392 return 1;
393}
394__setup("arcrimi=", arcrimi_setup);
395#endif
396
397module_init(arc_rimi_init)
398module_exit(arc_rimi_exit)
399