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