This source file includes following definitions.
- is_forced_dev
- eisa_name_device
- decode_eisa_sig
- eisa_bus_match
- eisa_bus_uevent
- eisa_driver_register
- eisa_driver_unregister
- eisa_show_sig
- eisa_show_state
- eisa_show_modalias
- eisa_init_device
- eisa_register_device
- eisa_request_resources
- eisa_release_resources
- eisa_probe
- eisa_root_register
- eisa_init
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8 #include <linux/kernel.h>
9 #include <linux/device.h>
10 #include <linux/eisa.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/ioport.h>
16 #include <asm/io.h>
17
18 #define SLOT_ADDRESS(r,n) (r->bus_base_addr + (0x1000 * n))
19
20 #define EISA_DEVINFO(i,s) { .id = { .sig = i }, .name = s }
21
22 struct eisa_device_info {
23 struct eisa_device_id id;
24 char name[50];
25 };
26
27 #ifdef CONFIG_EISA_NAMES
28 static struct eisa_device_info __initdata eisa_table[] = {
29 #include "devlist.h"
30 };
31 #define EISA_INFOS (sizeof (eisa_table) / (sizeof (struct eisa_device_info)))
32 #endif
33
34 #define EISA_MAX_FORCED_DEV 16
35
36 static int enable_dev[EISA_MAX_FORCED_DEV];
37 static unsigned int enable_dev_count;
38 static int disable_dev[EISA_MAX_FORCED_DEV];
39 static unsigned int disable_dev_count;
40
41 static int is_forced_dev(int *forced_tab,
42 int forced_count,
43 struct eisa_root_device *root,
44 struct eisa_device *edev)
45 {
46 int i, x;
47
48 for (i = 0; i < forced_count; i++) {
49 x = (root->bus_nr << 8) | edev->slot;
50 if (forced_tab[i] == x)
51 return 1;
52 }
53
54 return 0;
55 }
56
57 static void __init eisa_name_device(struct eisa_device *edev)
58 {
59 #ifdef CONFIG_EISA_NAMES
60 int i;
61 for (i = 0; i < EISA_INFOS; i++) {
62 if (!strcmp(edev->id.sig, eisa_table[i].id.sig)) {
63 strlcpy(edev->pretty_name,
64 eisa_table[i].name,
65 sizeof(edev->pretty_name));
66 return;
67 }
68 }
69
70
71 sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig);
72 #endif
73 }
74
75 static char __init *decode_eisa_sig(unsigned long addr)
76 {
77 static char sig_str[EISA_SIG_LEN];
78 u8 sig[4];
79 u16 rev;
80 int i;
81
82 for (i = 0; i < 4; i++) {
83 #ifdef CONFIG_EISA_VLB_PRIMING
84
85
86
87
88
89
90
91 outb(0x80 + i, addr);
92 #endif
93 sig[i] = inb(addr + i);
94
95 if (!i && (sig[0] & 0x80))
96 return NULL;
97 }
98
99 sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
100 sig_str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
101 sig_str[2] = (sig[1] & 0x1f) + ('A' - 1);
102 rev = (sig[2] << 8) | sig[3];
103 sprintf(sig_str + 3, "%04X", rev);
104
105 return sig_str;
106 }
107
108 static int eisa_bus_match(struct device *dev, struct device_driver *drv)
109 {
110 struct eisa_device *edev = to_eisa_device(dev);
111 struct eisa_driver *edrv = to_eisa_driver(drv);
112 const struct eisa_device_id *eids = edrv->id_table;
113
114 if (!eids)
115 return 0;
116
117 while (strlen(eids->sig)) {
118 if (!strcmp(eids->sig, edev->id.sig) &&
119 edev->state & EISA_CONFIG_ENABLED) {
120 edev->id.driver_data = eids->driver_data;
121 return 1;
122 }
123
124 eids++;
125 }
126
127 return 0;
128 }
129
130 static int eisa_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
131 {
132 struct eisa_device *edev = to_eisa_device(dev);
133
134 add_uevent_var(env, "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig);
135 return 0;
136 }
137
138 struct bus_type eisa_bus_type = {
139 .name = "eisa",
140 .match = eisa_bus_match,
141 .uevent = eisa_bus_uevent,
142 };
143 EXPORT_SYMBOL(eisa_bus_type);
144
145 int eisa_driver_register(struct eisa_driver *edrv)
146 {
147 edrv->driver.bus = &eisa_bus_type;
148 return driver_register(&edrv->driver);
149 }
150 EXPORT_SYMBOL(eisa_driver_register);
151
152 void eisa_driver_unregister(struct eisa_driver *edrv)
153 {
154 driver_unregister(&edrv->driver);
155 }
156 EXPORT_SYMBOL(eisa_driver_unregister);
157
158 static ssize_t eisa_show_sig(struct device *dev, struct device_attribute *attr,
159 char *buf)
160 {
161 struct eisa_device *edev = to_eisa_device(dev);
162 return sprintf(buf, "%s\n", edev->id.sig);
163 }
164
165 static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);
166
167 static ssize_t eisa_show_state(struct device *dev,
168 struct device_attribute *attr,
169 char *buf)
170 {
171 struct eisa_device *edev = to_eisa_device(dev);
172 return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
173 }
174
175 static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
176
177 static ssize_t eisa_show_modalias(struct device *dev,
178 struct device_attribute *attr,
179 char *buf)
180 {
181 struct eisa_device *edev = to_eisa_device(dev);
182 return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
183 }
184
185 static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);
186
187 static int __init eisa_init_device(struct eisa_root_device *root,
188 struct eisa_device *edev,
189 int slot)
190 {
191 char *sig;
192 unsigned long sig_addr;
193 int i;
194
195 sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;
196
197 sig = decode_eisa_sig(sig_addr);
198 if (!sig)
199 return -1;
200
201 memcpy(edev->id.sig, sig, EISA_SIG_LEN);
202 edev->slot = slot;
203 edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
204 & EISA_CONFIG_ENABLED;
205 edev->base_addr = SLOT_ADDRESS(root, slot);
206 edev->dma_mask = root->dma_mask;
207 eisa_name_device(edev);
208 edev->dev.parent = root->dev;
209 edev->dev.bus = &eisa_bus_type;
210 edev->dev.dma_mask = &edev->dma_mask;
211 edev->dev.coherent_dma_mask = edev->dma_mask;
212 dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);
213
214 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
215 #ifdef CONFIG_EISA_NAMES
216 edev->res[i].name = edev->pretty_name;
217 #else
218 edev->res[i].name = edev->id.sig;
219 #endif
220 }
221
222 if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
223 edev->state = EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED;
224
225 if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
226 edev->state = EISA_CONFIG_FORCED;
227
228 return 0;
229 }
230
231 static int __init eisa_register_device(struct eisa_device *edev)
232 {
233 int rc = device_register(&edev->dev);
234 if (rc) {
235 put_device(&edev->dev);
236 return rc;
237 }
238
239 rc = device_create_file(&edev->dev, &dev_attr_signature);
240 if (rc)
241 goto err_devreg;
242 rc = device_create_file(&edev->dev, &dev_attr_enabled);
243 if (rc)
244 goto err_sig;
245 rc = device_create_file(&edev->dev, &dev_attr_modalias);
246 if (rc)
247 goto err_enab;
248
249 return 0;
250
251 err_enab:
252 device_remove_file(&edev->dev, &dev_attr_enabled);
253 err_sig:
254 device_remove_file(&edev->dev, &dev_attr_signature);
255 err_devreg:
256 device_unregister(&edev->dev);
257 return rc;
258 }
259
260 static int __init eisa_request_resources(struct eisa_root_device *root,
261 struct eisa_device *edev,
262 int slot)
263 {
264 int i;
265
266 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
267
268
269
270
271
272
273 if (!slot && i > 0) {
274 edev->res[i].start = edev->res[i].end = 0;
275 continue;
276 }
277
278 if (slot) {
279 edev->res[i].name = NULL;
280 edev->res[i].start = SLOT_ADDRESS(root, slot)
281 + (i * 0x400);
282 edev->res[i].end = edev->res[i].start + 0xff;
283 edev->res[i].flags = IORESOURCE_IO;
284 } else {
285 edev->res[i].name = NULL;
286 edev->res[i].start = SLOT_ADDRESS(root, slot)
287 + EISA_VENDOR_ID_OFFSET;
288 edev->res[i].end = edev->res[i].start + 3;
289 edev->res[i].flags = IORESOURCE_IO | IORESOURCE_BUSY;
290 }
291
292 if (request_resource(root->res, &edev->res[i]))
293 goto failed;
294 }
295
296 return 0;
297
298 failed:
299 while (--i >= 0)
300 release_resource(&edev->res[i]);
301
302 return -1;
303 }
304
305 static void __init eisa_release_resources(struct eisa_device *edev)
306 {
307 int i;
308
309 for (i = 0; i < EISA_MAX_RESOURCES; i++)
310 if (edev->res[i].start || edev->res[i].end)
311 release_resource(&edev->res[i]);
312 }
313
314 static int __init eisa_probe(struct eisa_root_device *root)
315 {
316 int i, c;
317 struct eisa_device *edev;
318 char *enabled_str;
319
320 dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);
321
322
323
324
325 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
326 if (!edev)
327 return -ENOMEM;
328
329 if (eisa_request_resources(root, edev, 0)) {
330 dev_warn(root->dev,
331 "EISA: Cannot allocate resource for mainboard\n");
332 kfree(edev);
333 if (!root->force_probe)
334 return -EBUSY;
335 goto force_probe;
336 }
337
338 if (eisa_init_device(root, edev, 0)) {
339 eisa_release_resources(edev);
340 kfree(edev);
341 if (!root->force_probe)
342 return -ENODEV;
343 goto force_probe;
344 }
345
346 dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);
347
348 if (eisa_register_device(edev)) {
349 dev_err(&edev->dev, "EISA: Failed to register %s\n",
350 edev->id.sig);
351 eisa_release_resources(edev);
352 kfree(edev);
353 }
354
355 force_probe:
356
357 for (c = 0, i = 1; i <= root->slots; i++) {
358 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
359 if (!edev) {
360 dev_err(root->dev, "EISA: Out of memory for slot %d\n",
361 i);
362 continue;
363 }
364
365 if (eisa_request_resources(root, edev, i)) {
366 dev_warn(root->dev,
367 "Cannot allocate resource for EISA slot %d\n",
368 i);
369 kfree(edev);
370 continue;
371 }
372
373 if (eisa_init_device(root, edev, i)) {
374 eisa_release_resources(edev);
375 kfree(edev);
376 continue;
377 }
378
379 if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED))
380 enabled_str = " (forced enabled)";
381 else if (edev->state == EISA_CONFIG_FORCED)
382 enabled_str = " (forced disabled)";
383 else if (edev->state == 0)
384 enabled_str = " (disabled)";
385 else
386 enabled_str = "";
387
388 dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
389 edev->id.sig, enabled_str);
390
391 c++;
392
393 if (eisa_register_device(edev)) {
394 dev_err(&edev->dev, "EISA: Failed to register %s\n",
395 edev->id.sig);
396 eisa_release_resources(edev);
397 kfree(edev);
398 }
399 }
400
401 dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
402 return 0;
403 }
404
405 static struct resource eisa_root_res = {
406 .name = "EISA root resource",
407 .start = 0,
408 .end = 0xffffffff,
409 .flags = IORESOURCE_IO,
410 };
411
412 static int eisa_bus_count;
413
414 int __init eisa_root_register(struct eisa_root_device *root)
415 {
416 int err;
417
418
419
420
421
422
423 root->eisa_root_res.name = eisa_root_res.name;
424 root->eisa_root_res.start = root->res->start;
425 root->eisa_root_res.end = root->res->end;
426 root->eisa_root_res.flags = IORESOURCE_BUSY;
427
428 err = request_resource(&eisa_root_res, &root->eisa_root_res);
429 if (err)
430 return err;
431
432 root->bus_nr = eisa_bus_count++;
433
434 err = eisa_probe(root);
435 if (err)
436 release_resource(&root->eisa_root_res);
437
438 return err;
439 }
440
441 static int __init eisa_init(void)
442 {
443 int r;
444
445 r = bus_register(&eisa_bus_type);
446 if (r)
447 return r;
448
449 printk(KERN_INFO "EISA bus registered\n");
450 return 0;
451 }
452
453 module_param_array(enable_dev, int, &enable_dev_count, 0444);
454 module_param_array(disable_dev, int, &disable_dev_count, 0444);
455
456 postcore_initcall(eisa_init);
457
458 int EISA_bus;
459 EXPORT_SYMBOL(EISA_bus);