Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices | |
3 | * | |
c1017a4c | 4 | * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 5 | * Copyright 2003 Adam Belay <ambx1@neo.rr.com> |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <linux/errno.h> |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/kernel.h> | |
1da177e4 | 12 | #include <linux/pnp.h> |
4e57b681 TS |
13 | #include <linux/slab.h> |
14 | #include <linux/bitmap.h> | |
1da177e4 LT |
15 | #include "base.h" |
16 | ||
17 | DECLARE_MUTEX(pnp_res_mutex); | |
18 | ||
19 | static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx) | |
20 | { | |
b60ba834 GKH |
21 | resource_size_t *start, *end; |
22 | unsigned long *flags; | |
1da177e4 | 23 | |
1da177e4 | 24 | if (idx >= PNP_MAX_PORT) { |
a05d0781 | 25 | dev_err(&dev->dev, "too many I/O port resources\n"); |
1da177e4 LT |
26 | /* pretend we were successful so at least the manager won't try again */ |
27 | return 1; | |
28 | } | |
29 | ||
30 | /* check if this resource has been manually set, if so skip */ | |
31 | if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) | |
32 | return 1; | |
33 | ||
34 | start = &dev->res.port_resource[idx].start; | |
35 | end = &dev->res.port_resource[idx].end; | |
36 | flags = &dev->res.port_resource[idx].flags; | |
37 | ||
38 | /* set the initial values */ | |
39 | *flags |= rule->flags | IORESOURCE_IO; | |
9dd78466 | 40 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
41 | |
42 | if (!rule->size) { | |
43 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 44 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
45 | } |
46 | ||
47 | *start = rule->min; | |
48 | *end = *start + rule->size - 1; | |
49 | ||
50 | /* run through until pnp_check_port is happy */ | |
51 | while (!pnp_check_port(dev, idx)) { | |
52 | *start += rule->align; | |
53 | *end = *start + rule->size - 1; | |
54 | if (*start > rule->max || !rule->align) | |
55 | return 0; | |
56 | } | |
57 | return 1; | |
58 | } | |
59 | ||
60 | static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx) | |
61 | { | |
b60ba834 GKH |
62 | resource_size_t *start, *end; |
63 | unsigned long *flags; | |
1da177e4 | 64 | |
1da177e4 | 65 | if (idx >= PNP_MAX_MEM) { |
a05d0781 | 66 | dev_err(&dev->dev, "too many memory resources\n"); |
1da177e4 LT |
67 | /* pretend we were successful so at least the manager won't try again */ |
68 | return 1; | |
69 | } | |
70 | ||
71 | /* check if this resource has been manually set, if so skip */ | |
72 | if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) | |
73 | return 1; | |
74 | ||
75 | start = &dev->res.mem_resource[idx].start; | |
76 | end = &dev->res.mem_resource[idx].end; | |
77 | flags = &dev->res.mem_resource[idx].flags; | |
78 | ||
79 | /* set the initial values */ | |
80 | *flags |= rule->flags | IORESOURCE_MEM; | |
9dd78466 | 81 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
82 | |
83 | /* convert pnp flags to standard Linux flags */ | |
84 | if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) | |
85 | *flags |= IORESOURCE_READONLY; | |
86 | if (rule->flags & IORESOURCE_MEM_CACHEABLE) | |
87 | *flags |= IORESOURCE_CACHEABLE; | |
88 | if (rule->flags & IORESOURCE_MEM_RANGELENGTH) | |
89 | *flags |= IORESOURCE_RANGELENGTH; | |
90 | if (rule->flags & IORESOURCE_MEM_SHADOWABLE) | |
91 | *flags |= IORESOURCE_SHADOWABLE; | |
92 | ||
93 | if (!rule->size) { | |
94 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 95 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
96 | } |
97 | ||
98 | *start = rule->min; | |
9dd78466 | 99 | *end = *start + rule->size - 1; |
1da177e4 LT |
100 | |
101 | /* run through until pnp_check_mem is happy */ | |
102 | while (!pnp_check_mem(dev, idx)) { | |
103 | *start += rule->align; | |
104 | *end = *start + rule->size - 1; | |
105 | if (*start > rule->max || !rule->align) | |
106 | return 0; | |
107 | } | |
108 | return 1; | |
109 | } | |
110 | ||
9dd78466 | 111 | static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) |
1da177e4 | 112 | { |
b60ba834 GKH |
113 | resource_size_t *start, *end; |
114 | unsigned long *flags; | |
1da177e4 LT |
115 | int i; |
116 | ||
117 | /* IRQ priority: this table is good for i386 */ | |
118 | static unsigned short xtab[16] = { | |
119 | 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2 | |
120 | }; | |
121 | ||
1da177e4 | 122 | if (idx >= PNP_MAX_IRQ) { |
a05d0781 | 123 | dev_err(&dev->dev, "too many IRQ resources\n"); |
1da177e4 LT |
124 | /* pretend we were successful so at least the manager won't try again */ |
125 | return 1; | |
126 | } | |
127 | ||
128 | /* check if this resource has been manually set, if so skip */ | |
129 | if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) | |
130 | return 1; | |
131 | ||
132 | start = &dev->res.irq_resource[idx].start; | |
133 | end = &dev->res.irq_resource[idx].end; | |
134 | flags = &dev->res.irq_resource[idx].flags; | |
135 | ||
136 | /* set the initial values */ | |
137 | *flags |= rule->flags | IORESOURCE_IRQ; | |
9dd78466 | 138 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
139 | |
140 | if (bitmap_empty(rule->map, PNP_IRQ_NR)) { | |
141 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 142 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
143 | } |
144 | ||
145 | /* TBD: need check for >16 IRQ */ | |
146 | *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); | |
147 | if (*start < PNP_IRQ_NR) { | |
148 | *end = *start; | |
149 | return 1; | |
150 | } | |
151 | for (i = 0; i < 16; i++) { | |
9dd78466 | 152 | if (test_bit(xtab[i], rule->map)) { |
1da177e4 | 153 | *start = *end = xtab[i]; |
9dd78466 | 154 | if (pnp_check_irq(dev, idx)) |
1da177e4 LT |
155 | return 1; |
156 | } | |
157 | } | |
158 | return 0; | |
159 | } | |
160 | ||
7ef36390 | 161 | static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) |
1da177e4 | 162 | { |
b60ba834 GKH |
163 | resource_size_t *start, *end; |
164 | unsigned long *flags; | |
1da177e4 LT |
165 | int i; |
166 | ||
167 | /* DMA priority: this table is good for i386 */ | |
168 | static unsigned short xtab[8] = { | |
169 | 1, 3, 5, 6, 7, 0, 2, 4 | |
170 | }; | |
171 | ||
1da177e4 | 172 | if (idx >= PNP_MAX_DMA) { |
a05d0781 | 173 | dev_err(&dev->dev, "too many DMA resources\n"); |
7ef36390 | 174 | return; |
1da177e4 LT |
175 | } |
176 | ||
177 | /* check if this resource has been manually set, if so skip */ | |
178 | if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) | |
7ef36390 | 179 | return; |
1da177e4 LT |
180 | |
181 | start = &dev->res.dma_resource[idx].start; | |
182 | end = &dev->res.dma_resource[idx].end; | |
183 | flags = &dev->res.dma_resource[idx].flags; | |
184 | ||
185 | /* set the initial values */ | |
186 | *flags |= rule->flags | IORESOURCE_DMA; | |
9dd78466 | 187 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 | 188 | |
1da177e4 | 189 | for (i = 0; i < 8; i++) { |
9dd78466 | 190 | if (rule->map & (1 << xtab[i])) { |
1da177e4 | 191 | *start = *end = xtab[i]; |
9dd78466 | 192 | if (pnp_check_dma(dev, idx)) |
7ef36390 | 193 | return; |
1da177e4 LT |
194 | } |
195 | } | |
7ef36390 JB |
196 | #ifdef MAX_DMA_CHANNELS |
197 | *start = *end = MAX_DMA_CHANNELS; | |
198 | #endif | |
199 | *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; | |
1da177e4 LT |
200 | } |
201 | ||
202 | /** | |
203 | * pnp_init_resources - Resets a resource table to default values. | |
204 | * @table: pointer to the desired resource table | |
1da177e4 LT |
205 | */ |
206 | void pnp_init_resource_table(struct pnp_resource_table *table) | |
207 | { | |
208 | int idx; | |
07d4e9af | 209 | |
1da177e4 LT |
210 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
211 | table->irq_resource[idx].name = NULL; | |
212 | table->irq_resource[idx].start = -1; | |
213 | table->irq_resource[idx].end = -1; | |
9dd78466 BH |
214 | table->irq_resource[idx].flags = |
215 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
216 | } |
217 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
218 | table->dma_resource[idx].name = NULL; | |
219 | table->dma_resource[idx].start = -1; | |
220 | table->dma_resource[idx].end = -1; | |
9dd78466 BH |
221 | table->dma_resource[idx].flags = |
222 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
223 | } |
224 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
225 | table->port_resource[idx].name = NULL; | |
226 | table->port_resource[idx].start = 0; | |
227 | table->port_resource[idx].end = 0; | |
9dd78466 BH |
228 | table->port_resource[idx].flags = |
229 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
230 | } |
231 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
232 | table->mem_resource[idx].name = NULL; | |
233 | table->mem_resource[idx].start = 0; | |
234 | table->mem_resource[idx].end = 0; | |
9dd78466 BH |
235 | table->mem_resource[idx].flags = |
236 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
237 | } |
238 | } | |
239 | ||
240 | /** | |
241 | * pnp_clean_resources - clears resources that were not manually set | |
67be2dd1 | 242 | * @res: the resources to clean |
1da177e4 | 243 | */ |
9dd78466 | 244 | static void pnp_clean_resource_table(struct pnp_resource_table *res) |
1da177e4 LT |
245 | { |
246 | int idx; | |
07d4e9af | 247 | |
1da177e4 LT |
248 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
249 | if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO)) | |
250 | continue; | |
251 | res->irq_resource[idx].start = -1; | |
252 | res->irq_resource[idx].end = -1; | |
9dd78466 BH |
253 | res->irq_resource[idx].flags = |
254 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
255 | } |
256 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
257 | if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO)) | |
258 | continue; | |
259 | res->dma_resource[idx].start = -1; | |
260 | res->dma_resource[idx].end = -1; | |
9dd78466 BH |
261 | res->dma_resource[idx].flags = |
262 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
263 | } |
264 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
265 | if (!(res->port_resource[idx].flags & IORESOURCE_AUTO)) | |
266 | continue; | |
267 | res->port_resource[idx].start = 0; | |
268 | res->port_resource[idx].end = 0; | |
9dd78466 BH |
269 | res->port_resource[idx].flags = |
270 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
271 | } |
272 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
273 | if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO)) | |
274 | continue; | |
275 | res->mem_resource[idx].start = 0; | |
276 | res->mem_resource[idx].end = 0; | |
9dd78466 BH |
277 | res->mem_resource[idx].flags = |
278 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
279 | } |
280 | } | |
281 | ||
282 | /** | |
283 | * pnp_assign_resources - assigns resources to the device based on the specified dependent number | |
284 | * @dev: pointer to the desired device | |
285 | * @depnum: the dependent function number | |
286 | * | |
287 | * Only set depnum to 0 if the device does not have dependent options. | |
288 | */ | |
289 | static int pnp_assign_resources(struct pnp_dev *dev, int depnum) | |
290 | { | |
291 | struct pnp_port *port; | |
292 | struct pnp_mem *mem; | |
293 | struct pnp_irq *irq; | |
294 | struct pnp_dma *dma; | |
295 | int nport = 0, nmem = 0, nirq = 0, ndma = 0; | |
296 | ||
297 | if (!pnp_can_configure(dev)) | |
298 | return -ENODEV; | |
299 | ||
300 | down(&pnp_res_mutex); | |
9dd78466 | 301 | pnp_clean_resource_table(&dev->res); /* start with a fresh slate */ |
1da177e4 LT |
302 | if (dev->independent) { |
303 | port = dev->independent->port; | |
304 | mem = dev->independent->mem; | |
305 | irq = dev->independent->irq; | |
306 | dma = dev->independent->dma; | |
307 | while (port) { | |
308 | if (!pnp_assign_port(dev, port, nport)) | |
309 | goto fail; | |
310 | nport++; | |
311 | port = port->next; | |
312 | } | |
313 | while (mem) { | |
314 | if (!pnp_assign_mem(dev, mem, nmem)) | |
315 | goto fail; | |
316 | nmem++; | |
317 | mem = mem->next; | |
318 | } | |
319 | while (irq) { | |
320 | if (!pnp_assign_irq(dev, irq, nirq)) | |
321 | goto fail; | |
322 | nirq++; | |
323 | irq = irq->next; | |
324 | } | |
325 | while (dma) { | |
7ef36390 | 326 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
327 | ndma++; |
328 | dma = dma->next; | |
329 | } | |
330 | } | |
331 | ||
332 | if (depnum) { | |
333 | struct pnp_option *dep; | |
334 | int i; | |
9dd78466 BH |
335 | for (i = 1, dep = dev->dependent; i < depnum; |
336 | i++, dep = dep->next) | |
337 | if (!dep) | |
1da177e4 | 338 | goto fail; |
9dd78466 | 339 | port = dep->port; |
1da177e4 LT |
340 | mem = dep->mem; |
341 | irq = dep->irq; | |
342 | dma = dep->dma; | |
343 | while (port) { | |
344 | if (!pnp_assign_port(dev, port, nport)) | |
345 | goto fail; | |
346 | nport++; | |
347 | port = port->next; | |
348 | } | |
349 | while (mem) { | |
350 | if (!pnp_assign_mem(dev, mem, nmem)) | |
351 | goto fail; | |
352 | nmem++; | |
353 | mem = mem->next; | |
354 | } | |
355 | while (irq) { | |
356 | if (!pnp_assign_irq(dev, irq, nirq)) | |
357 | goto fail; | |
358 | nirq++; | |
359 | irq = irq->next; | |
360 | } | |
361 | while (dma) { | |
7ef36390 | 362 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
363 | ndma++; |
364 | dma = dma->next; | |
365 | } | |
366 | } else if (dev->dependent) | |
367 | goto fail; | |
368 | ||
369 | up(&pnp_res_mutex); | |
370 | return 1; | |
371 | ||
1e0aa9ad | 372 | fail: |
1da177e4 LT |
373 | pnp_clean_resource_table(&dev->res); |
374 | up(&pnp_res_mutex); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | /** | |
379 | * pnp_manual_config_dev - Disables Auto Config and Manually sets the resource table | |
380 | * @dev: pointer to the desired device | |
381 | * @res: pointer to the new resource config | |
3d41088f | 382 | * @mode: 0 or PNP_CONFIG_FORCE |
1da177e4 LT |
383 | * |
384 | * This function can be used by drivers that want to manually set thier resources. | |
385 | */ | |
9dd78466 BH |
386 | int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, |
387 | int mode) | |
1da177e4 LT |
388 | { |
389 | int i; | |
9dd78466 | 390 | struct pnp_resource_table *bak; |
07d4e9af | 391 | |
1da177e4 LT |
392 | if (!pnp_can_configure(dev)) |
393 | return -ENODEV; | |
394 | bak = pnp_alloc(sizeof(struct pnp_resource_table)); | |
395 | if (!bak) | |
396 | return -ENOMEM; | |
397 | *bak = dev->res; | |
398 | ||
399 | down(&pnp_res_mutex); | |
400 | dev->res = *res; | |
401 | if (!(mode & PNP_CONFIG_FORCE)) { | |
402 | for (i = 0; i < PNP_MAX_PORT; i++) { | |
9dd78466 | 403 | if (!pnp_check_port(dev, i)) |
1da177e4 LT |
404 | goto fail; |
405 | } | |
406 | for (i = 0; i < PNP_MAX_MEM; i++) { | |
9dd78466 | 407 | if (!pnp_check_mem(dev, i)) |
1da177e4 LT |
408 | goto fail; |
409 | } | |
410 | for (i = 0; i < PNP_MAX_IRQ; i++) { | |
9dd78466 | 411 | if (!pnp_check_irq(dev, i)) |
1da177e4 LT |
412 | goto fail; |
413 | } | |
414 | for (i = 0; i < PNP_MAX_DMA; i++) { | |
9dd78466 | 415 | if (!pnp_check_dma(dev, i)) |
1da177e4 LT |
416 | goto fail; |
417 | } | |
418 | } | |
419 | up(&pnp_res_mutex); | |
420 | ||
421 | kfree(bak); | |
422 | return 0; | |
423 | ||
1e0aa9ad | 424 | fail: |
1da177e4 LT |
425 | dev->res = *bak; |
426 | up(&pnp_res_mutex); | |
427 | kfree(bak); | |
428 | return -EINVAL; | |
429 | } | |
430 | ||
431 | /** | |
432 | * pnp_auto_config_dev - automatically assigns resources to a device | |
433 | * @dev: pointer to the desired device | |
1da177e4 LT |
434 | */ |
435 | int pnp_auto_config_dev(struct pnp_dev *dev) | |
436 | { | |
437 | struct pnp_option *dep; | |
438 | int i = 1; | |
439 | ||
9dd78466 | 440 | if (!pnp_can_configure(dev)) { |
a05d0781 | 441 | dev_dbg(&dev->dev, "configuration not supported\n"); |
1da177e4 LT |
442 | return -ENODEV; |
443 | } | |
444 | ||
445 | if (!dev->dependent) { | |
446 | if (pnp_assign_resources(dev, 0)) | |
447 | return 0; | |
448 | } else { | |
449 | dep = dev->dependent; | |
450 | do { | |
451 | if (pnp_assign_resources(dev, i)) | |
452 | return 0; | |
453 | dep = dep->next; | |
454 | i++; | |
455 | } while (dep); | |
456 | } | |
457 | ||
a05d0781 | 458 | dev_err(&dev->dev, "unable to assign resources\n"); |
1da177e4 LT |
459 | return -EBUSY; |
460 | } | |
461 | ||
68094e32 PO |
462 | /** |
463 | * pnp_start_dev - low-level start of the PnP device | |
464 | * @dev: pointer to the desired device | |
465 | * | |
07d4e9af | 466 | * assumes that resources have already been allocated |
68094e32 | 467 | */ |
68094e32 PO |
468 | int pnp_start_dev(struct pnp_dev *dev) |
469 | { | |
470 | if (!pnp_can_write(dev)) { | |
a05d0781 | 471 | dev_dbg(&dev->dev, "activation not supported\n"); |
68094e32 PO |
472 | return -EINVAL; |
473 | } | |
474 | ||
9dd78466 | 475 | if (dev->protocol->set(dev, &dev->res) < 0) { |
a05d0781 | 476 | dev_err(&dev->dev, "activation failed\n"); |
68094e32 PO |
477 | return -EIO; |
478 | } | |
479 | ||
a05d0781 | 480 | dev_info(&dev->dev, "activated\n"); |
68094e32 PO |
481 | return 0; |
482 | } | |
483 | ||
484 | /** | |
485 | * pnp_stop_dev - low-level disable of the PnP device | |
486 | * @dev: pointer to the desired device | |
487 | * | |
488 | * does not free resources | |
489 | */ | |
68094e32 PO |
490 | int pnp_stop_dev(struct pnp_dev *dev) |
491 | { | |
492 | if (!pnp_can_disable(dev)) { | |
a05d0781 | 493 | dev_dbg(&dev->dev, "disabling not supported\n"); |
68094e32 PO |
494 | return -EINVAL; |
495 | } | |
9dd78466 | 496 | if (dev->protocol->disable(dev) < 0) { |
a05d0781 | 497 | dev_err(&dev->dev, "disable failed\n"); |
68094e32 PO |
498 | return -EIO; |
499 | } | |
500 | ||
a05d0781 | 501 | dev_info(&dev->dev, "disabled\n"); |
68094e32 PO |
502 | return 0; |
503 | } | |
504 | ||
1da177e4 LT |
505 | /** |
506 | * pnp_activate_dev - activates a PnP device for use | |
507 | * @dev: pointer to the desired device | |
508 | * | |
509 | * does not validate or set resources so be careful. | |
510 | */ | |
511 | int pnp_activate_dev(struct pnp_dev *dev) | |
512 | { | |
68094e32 PO |
513 | int error; |
514 | ||
07d4e9af | 515 | if (dev->active) |
9dd78466 | 516 | return 0; /* the device is already active */ |
1da177e4 LT |
517 | |
518 | /* ensure resources are allocated */ | |
519 | if (pnp_auto_config_dev(dev)) | |
520 | return -EBUSY; | |
521 | ||
68094e32 PO |
522 | error = pnp_start_dev(dev); |
523 | if (error) | |
524 | return error; | |
1da177e4 LT |
525 | |
526 | dev->active = 1; | |
1da177e4 LT |
527 | return 1; |
528 | } | |
529 | ||
530 | /** | |
531 | * pnp_disable_dev - disables device | |
532 | * @dev: pointer to the desired device | |
533 | * | |
534 | * inform the correct pnp protocol so that resources can be used by other devices | |
535 | */ | |
536 | int pnp_disable_dev(struct pnp_dev *dev) | |
537 | { | |
68094e32 PO |
538 | int error; |
539 | ||
07d4e9af | 540 | if (!dev->active) |
9dd78466 | 541 | return 0; /* the device is already disabled */ |
1da177e4 | 542 | |
68094e32 PO |
543 | error = pnp_stop_dev(dev); |
544 | if (error) | |
545 | return error; | |
1da177e4 LT |
546 | |
547 | dev->active = 0; | |
1da177e4 LT |
548 | |
549 | /* release the resources so that other devices can use them */ | |
550 | down(&pnp_res_mutex); | |
551 | pnp_clean_resource_table(&dev->res); | |
552 | up(&pnp_res_mutex); | |
553 | ||
554 | return 1; | |
555 | } | |
556 | ||
557 | /** | |
558 | * pnp_resource_change - change one resource | |
559 | * @resource: pointer to resource to be changed | |
560 | * @start: start of region | |
561 | * @size: size of region | |
1da177e4 | 562 | */ |
b60ba834 | 563 | void pnp_resource_change(struct resource *resource, resource_size_t start, |
9dd78466 | 564 | resource_size_t size) |
1da177e4 | 565 | { |
1da177e4 LT |
566 | resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET); |
567 | resource->start = start; | |
568 | resource->end = start + size - 1; | |
569 | } | |
570 | ||
1da177e4 | 571 | EXPORT_SYMBOL(pnp_manual_config_dev); |
68094e32 PO |
572 | EXPORT_SYMBOL(pnp_start_dev); |
573 | EXPORT_SYMBOL(pnp_stop_dev); | |
1da177e4 LT |
574 | EXPORT_SYMBOL(pnp_activate_dev); |
575 | EXPORT_SYMBOL(pnp_disable_dev); | |
576 | EXPORT_SYMBOL(pnp_resource_change); | |
577 | EXPORT_SYMBOL(pnp_init_resource_table); |