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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * EISA bus support functions for sysfs.
4 *
5 * (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
6 */
7
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
22struct eisa_device_info {
23 struct eisa_device_id id;
24 char name[50];
25};
26
27#ifdef CONFIG_EISA_NAMES
28static 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
36static int enable_dev[EISA_MAX_FORCED_DEV];
37static unsigned int enable_dev_count;
38static int disable_dev[EISA_MAX_FORCED_DEV];
39static unsigned int disable_dev_count;
40
41static 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
57static 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 strscpy(edev->pretty_name,
64 eisa_table[i].name,
65 sizeof(edev->pretty_name));
66 return;
67 }
68 }
69
70 /* No name was found */
71 sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig);
72#endif
73}
74
75static 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 * This ugly stuff is used to wake up VL-bus cards
86 * (AHA-284x is the only known example), so we can
87 * read the EISA id.
88 *
89 * Thankfully, this only exists on x86...
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
108static int eisa_bus_match(struct device *dev, const struct device_driver *drv)
109{
110 struct eisa_device *edev = to_eisa_device(dev);
111 const 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
130static int eisa_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
131{
132 const 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
138struct bus_type eisa_bus_type = {
139 .name = "eisa",
140 .match = eisa_bus_match,
141 .uevent = eisa_bus_uevent,
142};
143EXPORT_SYMBOL(eisa_bus_type);
144
145int eisa_driver_register(struct eisa_driver *edrv)
146{
147 edrv->driver.bus = &eisa_bus_type;
148 return driver_register(&edrv->driver);
149}
150EXPORT_SYMBOL(eisa_driver_register);
151
152void eisa_driver_unregister(struct eisa_driver *edrv)
153{
154 driver_unregister(&edrv->driver);
155}
156EXPORT_SYMBOL(eisa_driver_unregister);
157
158static ssize_t signature_show(struct device *dev,
159 struct device_attribute *attr, char *buf)
160{
161 struct eisa_device *edev = to_eisa_device(dev);
162 return sprintf(buf, "%s\n", edev->id.sig);
163}
164static DEVICE_ATTR_RO(signature);
165
166static ssize_t enabled_show(struct device *dev,
167 struct device_attribute *attr, char *buf)
168{
169 struct eisa_device *edev = to_eisa_device(dev);
170 return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
171}
172static DEVICE_ATTR_RO(enabled);
173
174static ssize_t modalias_show(struct device *dev,
175 struct device_attribute *attr, char *buf)
176{
177 struct eisa_device *edev = to_eisa_device(dev);
178 return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
179}
180static DEVICE_ATTR_RO(modalias);
181
182static int __init eisa_init_device(struct eisa_root_device *root,
183 struct eisa_device *edev,
184 int slot)
185{
186 char *sig;
187 unsigned long sig_addr;
188 int i;
189
190 sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;
191
192 sig = decode_eisa_sig(sig_addr);
193 if (!sig)
194 return -1; /* No EISA device here */
195
196 memcpy(edev->id.sig, sig, EISA_SIG_LEN);
197 edev->slot = slot;
198 edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
199 & EISA_CONFIG_ENABLED;
200 edev->base_addr = SLOT_ADDRESS(root, slot);
201 edev->dma_mask = root->dma_mask; /* Default DMA mask */
202 eisa_name_device(edev);
203 edev->dev.parent = root->dev;
204 edev->dev.bus = &eisa_bus_type;
205 edev->dev.dma_mask = &edev->dma_mask;
206 edev->dev.coherent_dma_mask = edev->dma_mask;
207 dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);
208
209 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
210#ifdef CONFIG_EISA_NAMES
211 edev->res[i].name = edev->pretty_name;
212#else
213 edev->res[i].name = edev->id.sig;
214#endif
215 }
216
217 if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
218 edev->state = EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED;
219
220 if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
221 edev->state = EISA_CONFIG_FORCED;
222
223 return 0;
224}
225
226static int __init eisa_register_device(struct eisa_device *edev)
227{
228 int rc = device_register(&edev->dev);
229 if (rc) {
230 put_device(&edev->dev);
231 return rc;
232 }
233
234 rc = device_create_file(&edev->dev, &dev_attr_signature);
235 if (rc)
236 goto err_devreg;
237 rc = device_create_file(&edev->dev, &dev_attr_enabled);
238 if (rc)
239 goto err_sig;
240 rc = device_create_file(&edev->dev, &dev_attr_modalias);
241 if (rc)
242 goto err_enab;
243
244 return 0;
245
246err_enab:
247 device_remove_file(&edev->dev, &dev_attr_enabled);
248err_sig:
249 device_remove_file(&edev->dev, &dev_attr_signature);
250err_devreg:
251 device_unregister(&edev->dev);
252 return rc;
253}
254
255static int __init eisa_request_resources(struct eisa_root_device *root,
256 struct eisa_device *edev,
257 int slot)
258{
259 int i;
260
261 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
262 /* Don't register resource for slot 0, since this is
263 * very likely to fail... :-( Instead, grab the EISA
264 * id, now we can display something in /proc/ioports.
265 */
266
267 /* Only one region for mainboard */
268 if (!slot && i > 0) {
269 edev->res[i].start = edev->res[i].end = 0;
270 continue;
271 }
272
273 if (slot) {
274 edev->res[i].name = NULL;
275 edev->res[i].start = SLOT_ADDRESS(root, slot)
276 + (i * 0x400);
277 edev->res[i].end = edev->res[i].start + 0xff;
278 edev->res[i].flags = IORESOURCE_IO;
279 } else {
280 edev->res[i].name = NULL;
281 edev->res[i].start = SLOT_ADDRESS(root, slot)
282 + EISA_VENDOR_ID_OFFSET;
283 edev->res[i].end = edev->res[i].start + 3;
284 edev->res[i].flags = IORESOURCE_IO | IORESOURCE_BUSY;
285 }
286
287 if (request_resource(root->res, &edev->res[i]))
288 goto failed;
289 }
290
291 return 0;
292
293 failed:
294 while (--i >= 0)
295 release_resource(&edev->res[i]);
296
297 return -1;
298}
299
300static void __init eisa_release_resources(struct eisa_device *edev)
301{
302 int i;
303
304 for (i = 0; i < EISA_MAX_RESOURCES; i++)
305 if (edev->res[i].start || edev->res[i].end)
306 release_resource(&edev->res[i]);
307}
308
309static int __init eisa_probe(struct eisa_root_device *root)
310{
311 int i, c;
312 struct eisa_device *edev;
313 char *enabled_str;
314
315 dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);
316
317 /* First try to get hold of slot 0. If there is no device
318 * here, simply fail, unless root->force_probe is set. */
319
320 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
321 if (!edev)
322 return -ENOMEM;
323
324 if (eisa_request_resources(root, edev, 0)) {
325 dev_warn(root->dev,
326 "EISA: Cannot allocate resource for mainboard\n");
327 kfree(edev);
328 if (!root->force_probe)
329 return -EBUSY;
330 goto force_probe;
331 }
332
333 if (eisa_init_device(root, edev, 0)) {
334 eisa_release_resources(edev);
335 kfree(edev);
336 if (!root->force_probe)
337 return -ENODEV;
338 goto force_probe;
339 }
340
341 dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);
342
343 if (eisa_register_device(edev)) {
344 dev_err(&edev->dev, "EISA: Failed to register %s\n",
345 edev->id.sig);
346 eisa_release_resources(edev);
347 kfree(edev);
348 }
349
350 force_probe:
351
352 for (c = 0, i = 1; i <= root->slots; i++) {
353 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
354 if (!edev) {
355 dev_err(root->dev, "EISA: Out of memory for slot %d\n",
356 i);
357 continue;
358 }
359
360 if (eisa_request_resources(root, edev, i)) {
361 dev_warn(root->dev,
362 "Cannot allocate resource for EISA slot %d\n",
363 i);
364 kfree(edev);
365 continue;
366 }
367
368 if (eisa_init_device(root, edev, i)) {
369 eisa_release_resources(edev);
370 kfree(edev);
371 continue;
372 }
373
374 if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED))
375 enabled_str = " (forced enabled)";
376 else if (edev->state == EISA_CONFIG_FORCED)
377 enabled_str = " (forced disabled)";
378 else if (edev->state == 0)
379 enabled_str = " (disabled)";
380 else
381 enabled_str = "";
382
383 dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
384 edev->id.sig, enabled_str);
385
386 c++;
387
388 if (eisa_register_device(edev)) {
389 dev_err(&edev->dev, "EISA: Failed to register %s\n",
390 edev->id.sig);
391 eisa_release_resources(edev);
392 kfree(edev);
393 }
394 }
395
396 dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
397 return 0;
398}
399
400static struct resource eisa_root_res = {
401 .name = "EISA root resource",
402 .start = 0,
403 .end = 0xffffffff,
404 .flags = IORESOURCE_IO,
405};
406
407static int eisa_bus_count;
408
409int __init eisa_root_register(struct eisa_root_device *root)
410{
411 int err;
412
413 /* Use our own resources to check if this bus base address has
414 * been already registered. This prevents the virtual root
415 * device from registering after the real one has, for
416 * example... */
417
418 root->eisa_root_res.name = eisa_root_res.name;
419 root->eisa_root_res.start = root->res->start;
420 root->eisa_root_res.end = root->res->end;
421 root->eisa_root_res.flags = IORESOURCE_BUSY;
422
423 err = request_resource(&eisa_root_res, &root->eisa_root_res);
424 if (err)
425 return err;
426
427 root->bus_nr = eisa_bus_count++;
428
429 err = eisa_probe(root);
430 if (err)
431 release_resource(&root->eisa_root_res);
432
433 return err;
434}
435
436static int __init eisa_init(void)
437{
438 int r;
439
440 r = bus_register(&eisa_bus_type);
441 if (r)
442 return r;
443
444 printk(KERN_INFO "EISA bus registered\n");
445 return 0;
446}
447
448module_param_array(enable_dev, int, &enable_dev_count, 0444);
449module_param_array(disable_dev, int, &disable_dev_count, 0444);
450
451postcore_initcall(eisa_init);
452
453int EISA_bus; /* for legacy drivers */
454EXPORT_SYMBOL(EISA_bus);
1/*
2 * EISA bus support functions for sysfs.
3 *
4 * (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
5 *
6 * This code is released under the GPL version 2.
7 */
8
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 /* No name was found */
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 * This ugly stuff is used to wake up VL-bus cards
87 * (AHA-284x is the only known example), so we can
88 * read the EISA id.
89 *
90 * Thankfully, this only exists on x86...
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};
144EXPORT_SYMBOL(eisa_bus_type);
145
146int eisa_driver_register(struct eisa_driver *edrv)
147{
148 edrv->driver.bus = &eisa_bus_type;
149 return driver_register(&edrv->driver);
150}
151EXPORT_SYMBOL(eisa_driver_register);
152
153void eisa_driver_unregister(struct eisa_driver *edrv)
154{
155 driver_unregister(&edrv->driver);
156}
157EXPORT_SYMBOL(eisa_driver_unregister);
158
159static ssize_t eisa_show_sig(struct device *dev, struct device_attribute *attr,
160 char *buf)
161{
162 struct eisa_device *edev = to_eisa_device(dev);
163 return sprintf(buf, "%s\n", edev->id.sig);
164}
165
166static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);
167
168static ssize_t eisa_show_state(struct device *dev,
169 struct device_attribute *attr,
170 char *buf)
171{
172 struct eisa_device *edev = to_eisa_device(dev);
173 return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
174}
175
176static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
177
178static ssize_t eisa_show_modalias(struct device *dev,
179 struct device_attribute *attr,
180 char *buf)
181{
182 struct eisa_device *edev = to_eisa_device(dev);
183 return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
184}
185
186static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);
187
188static int __init eisa_init_device(struct eisa_root_device *root,
189 struct eisa_device *edev,
190 int slot)
191{
192 char *sig;
193 unsigned long sig_addr;
194 int i;
195
196 sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;
197
198 sig = decode_eisa_sig(sig_addr);
199 if (!sig)
200 return -1; /* No EISA device here */
201
202 memcpy(edev->id.sig, sig, EISA_SIG_LEN);
203 edev->slot = slot;
204 edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
205 & EISA_CONFIG_ENABLED;
206 edev->base_addr = SLOT_ADDRESS(root, slot);
207 edev->dma_mask = root->dma_mask; /* Default DMA mask */
208 eisa_name_device(edev);
209 edev->dev.parent = root->dev;
210 edev->dev.bus = &eisa_bus_type;
211 edev->dev.dma_mask = &edev->dma_mask;
212 edev->dev.coherent_dma_mask = edev->dma_mask;
213 dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);
214
215 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
216#ifdef CONFIG_EISA_NAMES
217 edev->res[i].name = edev->pretty_name;
218#else
219 edev->res[i].name = edev->id.sig;
220#endif
221 }
222
223 if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
224 edev->state = EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED;
225
226 if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
227 edev->state = EISA_CONFIG_FORCED;
228
229 return 0;
230}
231
232static int __init eisa_register_device(struct eisa_device *edev)
233{
234 int rc = device_register(&edev->dev);
235 if (rc) {
236 put_device(&edev->dev);
237 return rc;
238 }
239
240 rc = device_create_file(&edev->dev, &dev_attr_signature);
241 if (rc)
242 goto err_devreg;
243 rc = device_create_file(&edev->dev, &dev_attr_enabled);
244 if (rc)
245 goto err_sig;
246 rc = device_create_file(&edev->dev, &dev_attr_modalias);
247 if (rc)
248 goto err_enab;
249
250 return 0;
251
252err_enab:
253 device_remove_file(&edev->dev, &dev_attr_enabled);
254err_sig:
255 device_remove_file(&edev->dev, &dev_attr_signature);
256err_devreg:
257 device_unregister(&edev->dev);
258 return rc;
259}
260
261static int __init eisa_request_resources(struct eisa_root_device *root,
262 struct eisa_device *edev,
263 int slot)
264{
265 int i;
266
267 for (i = 0; i < EISA_MAX_RESOURCES; i++) {
268 /* Don't register resource for slot 0, since this is
269 * very likely to fail... :-( Instead, grab the EISA
270 * id, now we can display something in /proc/ioports.
271 */
272
273 /* Only one region for mainboard */
274 if (!slot && i > 0) {
275 edev->res[i].start = edev->res[i].end = 0;
276 continue;
277 }
278
279 if (slot) {
280 edev->res[i].name = NULL;
281 edev->res[i].start = SLOT_ADDRESS(root, slot)
282 + (i * 0x400);
283 edev->res[i].end = edev->res[i].start + 0xff;
284 edev->res[i].flags = IORESOURCE_IO;
285 } else {
286 edev->res[i].name = NULL;
287 edev->res[i].start = SLOT_ADDRESS(root, slot)
288 + EISA_VENDOR_ID_OFFSET;
289 edev->res[i].end = edev->res[i].start + 3;
290 edev->res[i].flags = IORESOURCE_IO | IORESOURCE_BUSY;
291 }
292
293 if (request_resource(root->res, &edev->res[i]))
294 goto failed;
295 }
296
297 return 0;
298
299 failed:
300 while (--i >= 0)
301 release_resource(&edev->res[i]);
302
303 return -1;
304}
305
306static void __init eisa_release_resources(struct eisa_device *edev)
307{
308 int i;
309
310 for (i = 0; i < EISA_MAX_RESOURCES; i++)
311 if (edev->res[i].start || edev->res[i].end)
312 release_resource(&edev->res[i]);
313}
314
315static int __init eisa_probe(struct eisa_root_device *root)
316{
317 int i, c;
318 struct eisa_device *edev;
319 char *enabled_str;
320
321 dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);
322
323 /* First try to get hold of slot 0. If there is no device
324 * here, simply fail, unless root->force_probe is set. */
325
326 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
327 if (!edev) {
328 dev_err(root->dev, "EISA: Couldn't allocate mainboard slot\n");
329 return -ENOMEM;
330 }
331
332 if (eisa_request_resources(root, edev, 0)) {
333 dev_warn(root->dev,
334 "EISA: Cannot allocate resource for mainboard\n");
335 kfree(edev);
336 if (!root->force_probe)
337 return -EBUSY;
338 goto force_probe;
339 }
340
341 if (eisa_init_device(root, edev, 0)) {
342 eisa_release_resources(edev);
343 kfree(edev);
344 if (!root->force_probe)
345 return -ENODEV;
346 goto force_probe;
347 }
348
349 dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);
350
351 if (eisa_register_device(edev)) {
352 dev_err(&edev->dev, "EISA: Failed to register %s\n",
353 edev->id.sig);
354 eisa_release_resources(edev);
355 kfree(edev);
356 }
357
358 force_probe:
359
360 for (c = 0, i = 1; i <= root->slots; i++) {
361 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
362 if (!edev) {
363 dev_err(root->dev, "EISA: Out of memory for slot %d\n",
364 i);
365 continue;
366 }
367
368 if (eisa_request_resources(root, edev, i)) {
369 dev_warn(root->dev,
370 "Cannot allocate resource for EISA slot %d\n",
371 i);
372 kfree(edev);
373 continue;
374 }
375
376 if (eisa_init_device(root, edev, i)) {
377 eisa_release_resources(edev);
378 kfree(edev);
379 continue;
380 }
381
382 if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED))
383 enabled_str = " (forced enabled)";
384 else if (edev->state == EISA_CONFIG_FORCED)
385 enabled_str = " (forced disabled)";
386 else if (edev->state == 0)
387 enabled_str = " (disabled)";
388 else
389 enabled_str = "";
390
391 dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
392 edev->id.sig, enabled_str);
393
394 c++;
395
396 if (eisa_register_device(edev)) {
397 dev_err(&edev->dev, "EISA: Failed to register %s\n",
398 edev->id.sig);
399 eisa_release_resources(edev);
400 kfree(edev);
401 }
402 }
403
404 dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
405 return 0;
406}
407
408static struct resource eisa_root_res = {
409 .name = "EISA root resource",
410 .start = 0,
411 .end = 0xffffffff,
412 .flags = IORESOURCE_IO,
413};
414
415static int eisa_bus_count;
416
417int __init eisa_root_register(struct eisa_root_device *root)
418{
419 int err;
420
421 /* Use our own resources to check if this bus base address has
422 * been already registered. This prevents the virtual root
423 * device from registering after the real one has, for
424 * example... */
425
426 root->eisa_root_res.name = eisa_root_res.name;
427 root->eisa_root_res.start = root->res->start;
428 root->eisa_root_res.end = root->res->end;
429 root->eisa_root_res.flags = IORESOURCE_BUSY;
430
431 err = request_resource(&eisa_root_res, &root->eisa_root_res);
432 if (err)
433 return err;
434
435 root->bus_nr = eisa_bus_count++;
436
437 err = eisa_probe(root);
438 if (err)
439 release_resource(&root->eisa_root_res);
440
441 return err;
442}
443
444static int __init eisa_init(void)
445{
446 int r;
447
448 r = bus_register(&eisa_bus_type);
449 if (r)
450 return r;
451
452 printk(KERN_INFO "EISA bus registered\n");
453 return 0;
454}
455
456module_param_array(enable_dev, int, &enable_dev_count, 0444);
457module_param_array(disable_dev, int, &disable_dev_count, 0444);
458
459postcore_initcall(eisa_init);
460
461int EISA_bus; /* for legacy drivers */
462EXPORT_SYMBOL(EISA_bus);