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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices | |
3 | * | |
4 | * based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz> | |
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) { |
9dd78466 BH |
25 | pnp_err |
26 | ("More than 4 ports is incompatible with pnp specifications."); | |
1da177e4 LT |
27 | /* pretend we were successful so at least the manager won't try again */ |
28 | return 1; | |
29 | } | |
30 | ||
31 | /* check if this resource has been manually set, if so skip */ | |
32 | if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) | |
33 | return 1; | |
34 | ||
35 | start = &dev->res.port_resource[idx].start; | |
36 | end = &dev->res.port_resource[idx].end; | |
37 | flags = &dev->res.port_resource[idx].flags; | |
38 | ||
39 | /* set the initial values */ | |
40 | *flags |= rule->flags | IORESOURCE_IO; | |
9dd78466 | 41 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
42 | |
43 | if (!rule->size) { | |
44 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 45 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
46 | } |
47 | ||
48 | *start = rule->min; | |
49 | *end = *start + rule->size - 1; | |
50 | ||
51 | /* run through until pnp_check_port is happy */ | |
52 | while (!pnp_check_port(dev, idx)) { | |
53 | *start += rule->align; | |
54 | *end = *start + rule->size - 1; | |
55 | if (*start > rule->max || !rule->align) | |
56 | return 0; | |
57 | } | |
58 | return 1; | |
59 | } | |
60 | ||
61 | static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx) | |
62 | { | |
b60ba834 GKH |
63 | resource_size_t *start, *end; |
64 | unsigned long *flags; | |
1da177e4 | 65 | |
1da177e4 | 66 | if (idx >= PNP_MAX_MEM) { |
9dd78466 BH |
67 | pnp_err |
68 | ("More than 8 mems is incompatible with pnp specifications."); | |
1da177e4 LT |
69 | /* pretend we were successful so at least the manager won't try again */ |
70 | return 1; | |
71 | } | |
72 | ||
73 | /* check if this resource has been manually set, if so skip */ | |
74 | if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) | |
75 | return 1; | |
76 | ||
77 | start = &dev->res.mem_resource[idx].start; | |
78 | end = &dev->res.mem_resource[idx].end; | |
79 | flags = &dev->res.mem_resource[idx].flags; | |
80 | ||
81 | /* set the initial values */ | |
82 | *flags |= rule->flags | IORESOURCE_MEM; | |
9dd78466 | 83 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
84 | |
85 | /* convert pnp flags to standard Linux flags */ | |
86 | if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) | |
87 | *flags |= IORESOURCE_READONLY; | |
88 | if (rule->flags & IORESOURCE_MEM_CACHEABLE) | |
89 | *flags |= IORESOURCE_CACHEABLE; | |
90 | if (rule->flags & IORESOURCE_MEM_RANGELENGTH) | |
91 | *flags |= IORESOURCE_RANGELENGTH; | |
92 | if (rule->flags & IORESOURCE_MEM_SHADOWABLE) | |
93 | *flags |= IORESOURCE_SHADOWABLE; | |
94 | ||
95 | if (!rule->size) { | |
96 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 97 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
98 | } |
99 | ||
100 | *start = rule->min; | |
9dd78466 | 101 | *end = *start + rule->size - 1; |
1da177e4 LT |
102 | |
103 | /* run through until pnp_check_mem is happy */ | |
104 | while (!pnp_check_mem(dev, idx)) { | |
105 | *start += rule->align; | |
106 | *end = *start + rule->size - 1; | |
107 | if (*start > rule->max || !rule->align) | |
108 | return 0; | |
109 | } | |
110 | return 1; | |
111 | } | |
112 | ||
9dd78466 | 113 | static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) |
1da177e4 | 114 | { |
b60ba834 GKH |
115 | resource_size_t *start, *end; |
116 | unsigned long *flags; | |
1da177e4 LT |
117 | int i; |
118 | ||
119 | /* IRQ priority: this table is good for i386 */ | |
120 | static unsigned short xtab[16] = { | |
121 | 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2 | |
122 | }; | |
123 | ||
1da177e4 | 124 | if (idx >= PNP_MAX_IRQ) { |
9dd78466 BH |
125 | pnp_err |
126 | ("More than 2 irqs is incompatible with pnp specifications."); | |
1da177e4 LT |
127 | /* pretend we were successful so at least the manager won't try again */ |
128 | return 1; | |
129 | } | |
130 | ||
131 | /* check if this resource has been manually set, if so skip */ | |
132 | if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) | |
133 | return 1; | |
134 | ||
135 | start = &dev->res.irq_resource[idx].start; | |
136 | end = &dev->res.irq_resource[idx].end; | |
137 | flags = &dev->res.irq_resource[idx].flags; | |
138 | ||
139 | /* set the initial values */ | |
140 | *flags |= rule->flags | IORESOURCE_IRQ; | |
9dd78466 | 141 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
142 | |
143 | if (bitmap_empty(rule->map, PNP_IRQ_NR)) { | |
144 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 145 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
146 | } |
147 | ||
148 | /* TBD: need check for >16 IRQ */ | |
149 | *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); | |
150 | if (*start < PNP_IRQ_NR) { | |
151 | *end = *start; | |
152 | return 1; | |
153 | } | |
154 | for (i = 0; i < 16; i++) { | |
9dd78466 | 155 | if (test_bit(xtab[i], rule->map)) { |
1da177e4 | 156 | *start = *end = xtab[i]; |
9dd78466 | 157 | if (pnp_check_irq(dev, idx)) |
1da177e4 LT |
158 | return 1; |
159 | } | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) | |
165 | { | |
b60ba834 GKH |
166 | resource_size_t *start, *end; |
167 | unsigned long *flags; | |
1da177e4 LT |
168 | int i; |
169 | ||
170 | /* DMA priority: this table is good for i386 */ | |
171 | static unsigned short xtab[8] = { | |
172 | 1, 3, 5, 6, 7, 0, 2, 4 | |
173 | }; | |
174 | ||
1da177e4 | 175 | if (idx >= PNP_MAX_DMA) { |
9dd78466 BH |
176 | pnp_err |
177 | ("More than 2 dmas is incompatible with pnp specifications."); | |
1da177e4 LT |
178 | /* pretend we were successful so at least the manager won't try again */ |
179 | return 1; | |
180 | } | |
181 | ||
182 | /* check if this resource has been manually set, if so skip */ | |
183 | if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) | |
184 | return 1; | |
185 | ||
186 | start = &dev->res.dma_resource[idx].start; | |
187 | end = &dev->res.dma_resource[idx].end; | |
188 | flags = &dev->res.dma_resource[idx].flags; | |
189 | ||
190 | /* set the initial values */ | |
191 | *flags |= rule->flags | IORESOURCE_DMA; | |
9dd78466 | 192 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
193 | |
194 | if (!rule->map) { | |
195 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 196 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
197 | } |
198 | ||
199 | for (i = 0; i < 8; i++) { | |
9dd78466 | 200 | if (rule->map & (1 << xtab[i])) { |
1da177e4 | 201 | *start = *end = xtab[i]; |
9dd78466 | 202 | if (pnp_check_dma(dev, idx)) |
1da177e4 LT |
203 | return 1; |
204 | } | |
205 | } | |
206 | return 0; | |
207 | } | |
208 | ||
209 | /** | |
210 | * pnp_init_resources - Resets a resource table to default values. | |
211 | * @table: pointer to the desired resource table | |
1da177e4 LT |
212 | */ |
213 | void pnp_init_resource_table(struct pnp_resource_table *table) | |
214 | { | |
215 | int idx; | |
07d4e9af | 216 | |
1da177e4 LT |
217 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
218 | table->irq_resource[idx].name = NULL; | |
219 | table->irq_resource[idx].start = -1; | |
220 | table->irq_resource[idx].end = -1; | |
9dd78466 BH |
221 | table->irq_resource[idx].flags = |
222 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
223 | } |
224 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
225 | table->dma_resource[idx].name = NULL; | |
226 | table->dma_resource[idx].start = -1; | |
227 | table->dma_resource[idx].end = -1; | |
9dd78466 BH |
228 | table->dma_resource[idx].flags = |
229 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
230 | } |
231 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
232 | table->port_resource[idx].name = NULL; | |
233 | table->port_resource[idx].start = 0; | |
234 | table->port_resource[idx].end = 0; | |
9dd78466 BH |
235 | table->port_resource[idx].flags = |
236 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
237 | } |
238 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
239 | table->mem_resource[idx].name = NULL; | |
240 | table->mem_resource[idx].start = 0; | |
241 | table->mem_resource[idx].end = 0; | |
9dd78466 BH |
242 | table->mem_resource[idx].flags = |
243 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
244 | } |
245 | } | |
246 | ||
247 | /** | |
248 | * pnp_clean_resources - clears resources that were not manually set | |
67be2dd1 | 249 | * @res: the resources to clean |
1da177e4 | 250 | */ |
9dd78466 | 251 | static void pnp_clean_resource_table(struct pnp_resource_table *res) |
1da177e4 LT |
252 | { |
253 | int idx; | |
07d4e9af | 254 | |
1da177e4 LT |
255 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
256 | if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO)) | |
257 | continue; | |
258 | res->irq_resource[idx].start = -1; | |
259 | res->irq_resource[idx].end = -1; | |
9dd78466 BH |
260 | res->irq_resource[idx].flags = |
261 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
262 | } |
263 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
264 | if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO)) | |
265 | continue; | |
266 | res->dma_resource[idx].start = -1; | |
267 | res->dma_resource[idx].end = -1; | |
9dd78466 BH |
268 | res->dma_resource[idx].flags = |
269 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
270 | } |
271 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
272 | if (!(res->port_resource[idx].flags & IORESOURCE_AUTO)) | |
273 | continue; | |
274 | res->port_resource[idx].start = 0; | |
275 | res->port_resource[idx].end = 0; | |
9dd78466 BH |
276 | res->port_resource[idx].flags = |
277 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
278 | } |
279 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
280 | if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO)) | |
281 | continue; | |
282 | res->mem_resource[idx].start = 0; | |
283 | res->mem_resource[idx].end = 0; | |
9dd78466 BH |
284 | res->mem_resource[idx].flags = |
285 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
286 | } |
287 | } | |
288 | ||
289 | /** | |
290 | * pnp_assign_resources - assigns resources to the device based on the specified dependent number | |
291 | * @dev: pointer to the desired device | |
292 | * @depnum: the dependent function number | |
293 | * | |
294 | * Only set depnum to 0 if the device does not have dependent options. | |
295 | */ | |
296 | static int pnp_assign_resources(struct pnp_dev *dev, int depnum) | |
297 | { | |
298 | struct pnp_port *port; | |
299 | struct pnp_mem *mem; | |
300 | struct pnp_irq *irq; | |
301 | struct pnp_dma *dma; | |
302 | int nport = 0, nmem = 0, nirq = 0, ndma = 0; | |
303 | ||
304 | if (!pnp_can_configure(dev)) | |
305 | return -ENODEV; | |
306 | ||
307 | down(&pnp_res_mutex); | |
9dd78466 | 308 | pnp_clean_resource_table(&dev->res); /* start with a fresh slate */ |
1da177e4 LT |
309 | if (dev->independent) { |
310 | port = dev->independent->port; | |
311 | mem = dev->independent->mem; | |
312 | irq = dev->independent->irq; | |
313 | dma = dev->independent->dma; | |
314 | while (port) { | |
315 | if (!pnp_assign_port(dev, port, nport)) | |
316 | goto fail; | |
317 | nport++; | |
318 | port = port->next; | |
319 | } | |
320 | while (mem) { | |
321 | if (!pnp_assign_mem(dev, mem, nmem)) | |
322 | goto fail; | |
323 | nmem++; | |
324 | mem = mem->next; | |
325 | } | |
326 | while (irq) { | |
327 | if (!pnp_assign_irq(dev, irq, nirq)) | |
328 | goto fail; | |
329 | nirq++; | |
330 | irq = irq->next; | |
331 | } | |
332 | while (dma) { | |
333 | if (!pnp_assign_dma(dev, dma, ndma)) | |
334 | goto fail; | |
335 | ndma++; | |
336 | dma = dma->next; | |
337 | } | |
338 | } | |
339 | ||
340 | if (depnum) { | |
341 | struct pnp_option *dep; | |
342 | int i; | |
9dd78466 BH |
343 | for (i = 1, dep = dev->dependent; i < depnum; |
344 | i++, dep = dep->next) | |
345 | if (!dep) | |
1da177e4 | 346 | goto fail; |
9dd78466 | 347 | port = dep->port; |
1da177e4 LT |
348 | mem = dep->mem; |
349 | irq = dep->irq; | |
350 | dma = dep->dma; | |
351 | while (port) { | |
352 | if (!pnp_assign_port(dev, port, nport)) | |
353 | goto fail; | |
354 | nport++; | |
355 | port = port->next; | |
356 | } | |
357 | while (mem) { | |
358 | if (!pnp_assign_mem(dev, mem, nmem)) | |
359 | goto fail; | |
360 | nmem++; | |
361 | mem = mem->next; | |
362 | } | |
363 | while (irq) { | |
364 | if (!pnp_assign_irq(dev, irq, nirq)) | |
365 | goto fail; | |
366 | nirq++; | |
367 | irq = irq->next; | |
368 | } | |
369 | while (dma) { | |
370 | if (!pnp_assign_dma(dev, dma, ndma)) | |
371 | goto fail; | |
372 | ndma++; | |
373 | dma = dma->next; | |
374 | } | |
375 | } else if (dev->dependent) | |
376 | goto fail; | |
377 | ||
378 | up(&pnp_res_mutex); | |
379 | return 1; | |
380 | ||
1e0aa9ad | 381 | fail: |
1da177e4 LT |
382 | pnp_clean_resource_table(&dev->res); |
383 | up(&pnp_res_mutex); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /** | |
388 | * pnp_manual_config_dev - Disables Auto Config and Manually sets the resource table | |
389 | * @dev: pointer to the desired device | |
390 | * @res: pointer to the new resource config | |
3d41088f | 391 | * @mode: 0 or PNP_CONFIG_FORCE |
1da177e4 LT |
392 | * |
393 | * This function can be used by drivers that want to manually set thier resources. | |
394 | */ | |
9dd78466 BH |
395 | int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, |
396 | int mode) | |
1da177e4 LT |
397 | { |
398 | int i; | |
9dd78466 | 399 | struct pnp_resource_table *bak; |
07d4e9af | 400 | |
1da177e4 LT |
401 | if (!pnp_can_configure(dev)) |
402 | return -ENODEV; | |
403 | bak = pnp_alloc(sizeof(struct pnp_resource_table)); | |
404 | if (!bak) | |
405 | return -ENOMEM; | |
406 | *bak = dev->res; | |
407 | ||
408 | down(&pnp_res_mutex); | |
409 | dev->res = *res; | |
410 | if (!(mode & PNP_CONFIG_FORCE)) { | |
411 | for (i = 0; i < PNP_MAX_PORT; i++) { | |
9dd78466 | 412 | if (!pnp_check_port(dev, i)) |
1da177e4 LT |
413 | goto fail; |
414 | } | |
415 | for (i = 0; i < PNP_MAX_MEM; i++) { | |
9dd78466 | 416 | if (!pnp_check_mem(dev, i)) |
1da177e4 LT |
417 | goto fail; |
418 | } | |
419 | for (i = 0; i < PNP_MAX_IRQ; i++) { | |
9dd78466 | 420 | if (!pnp_check_irq(dev, i)) |
1da177e4 LT |
421 | goto fail; |
422 | } | |
423 | for (i = 0; i < PNP_MAX_DMA; i++) { | |
9dd78466 | 424 | if (!pnp_check_dma(dev, i)) |
1da177e4 LT |
425 | goto fail; |
426 | } | |
427 | } | |
428 | up(&pnp_res_mutex); | |
429 | ||
430 | kfree(bak); | |
431 | return 0; | |
432 | ||
1e0aa9ad | 433 | fail: |
1da177e4 LT |
434 | dev->res = *bak; |
435 | up(&pnp_res_mutex); | |
436 | kfree(bak); | |
437 | return -EINVAL; | |
438 | } | |
439 | ||
440 | /** | |
441 | * pnp_auto_config_dev - automatically assigns resources to a device | |
442 | * @dev: pointer to the desired device | |
1da177e4 LT |
443 | */ |
444 | int pnp_auto_config_dev(struct pnp_dev *dev) | |
445 | { | |
446 | struct pnp_option *dep; | |
447 | int i = 1; | |
448 | ||
9dd78466 BH |
449 | if (!pnp_can_configure(dev)) { |
450 | pnp_dbg("Device %s does not support resource configuration.", | |
451 | dev->dev.bus_id); | |
1da177e4 LT |
452 | return -ENODEV; |
453 | } | |
454 | ||
455 | if (!dev->dependent) { | |
456 | if (pnp_assign_resources(dev, 0)) | |
457 | return 0; | |
458 | } else { | |
459 | dep = dev->dependent; | |
460 | do { | |
461 | if (pnp_assign_resources(dev, i)) | |
462 | return 0; | |
463 | dep = dep->next; | |
464 | i++; | |
465 | } while (dep); | |
466 | } | |
467 | ||
468 | pnp_err("Unable to assign resources to device %s.", dev->dev.bus_id); | |
469 | return -EBUSY; | |
470 | } | |
471 | ||
68094e32 PO |
472 | /** |
473 | * pnp_start_dev - low-level start of the PnP device | |
474 | * @dev: pointer to the desired device | |
475 | * | |
07d4e9af | 476 | * assumes that resources have already been allocated |
68094e32 | 477 | */ |
68094e32 PO |
478 | int pnp_start_dev(struct pnp_dev *dev) |
479 | { | |
480 | if (!pnp_can_write(dev)) { | |
9dd78466 BH |
481 | pnp_dbg("Device %s does not support activation.", |
482 | dev->dev.bus_id); | |
68094e32 PO |
483 | return -EINVAL; |
484 | } | |
485 | ||
9dd78466 | 486 | if (dev->protocol->set(dev, &dev->res) < 0) { |
68094e32 PO |
487 | pnp_err("Failed to activate device %s.", dev->dev.bus_id); |
488 | return -EIO; | |
489 | } | |
490 | ||
491 | pnp_info("Device %s activated.", dev->dev.bus_id); | |
68094e32 PO |
492 | return 0; |
493 | } | |
494 | ||
495 | /** | |
496 | * pnp_stop_dev - low-level disable of the PnP device | |
497 | * @dev: pointer to the desired device | |
498 | * | |
499 | * does not free resources | |
500 | */ | |
68094e32 PO |
501 | int pnp_stop_dev(struct pnp_dev *dev) |
502 | { | |
503 | if (!pnp_can_disable(dev)) { | |
9dd78466 BH |
504 | pnp_dbg("Device %s does not support disabling.", |
505 | dev->dev.bus_id); | |
68094e32 PO |
506 | return -EINVAL; |
507 | } | |
9dd78466 | 508 | if (dev->protocol->disable(dev) < 0) { |
68094e32 PO |
509 | pnp_err("Failed to disable device %s.", dev->dev.bus_id); |
510 | return -EIO; | |
511 | } | |
512 | ||
513 | pnp_info("Device %s disabled.", dev->dev.bus_id); | |
68094e32 PO |
514 | return 0; |
515 | } | |
516 | ||
1da177e4 LT |
517 | /** |
518 | * pnp_activate_dev - activates a PnP device for use | |
519 | * @dev: pointer to the desired device | |
520 | * | |
521 | * does not validate or set resources so be careful. | |
522 | */ | |
523 | int pnp_activate_dev(struct pnp_dev *dev) | |
524 | { | |
68094e32 PO |
525 | int error; |
526 | ||
07d4e9af | 527 | if (dev->active) |
9dd78466 | 528 | return 0; /* the device is already active */ |
1da177e4 LT |
529 | |
530 | /* ensure resources are allocated */ | |
531 | if (pnp_auto_config_dev(dev)) | |
532 | return -EBUSY; | |
533 | ||
68094e32 PO |
534 | error = pnp_start_dev(dev); |
535 | if (error) | |
536 | return error; | |
1da177e4 LT |
537 | |
538 | dev->active = 1; | |
1da177e4 LT |
539 | return 1; |
540 | } | |
541 | ||
542 | /** | |
543 | * pnp_disable_dev - disables device | |
544 | * @dev: pointer to the desired device | |
545 | * | |
546 | * inform the correct pnp protocol so that resources can be used by other devices | |
547 | */ | |
548 | int pnp_disable_dev(struct pnp_dev *dev) | |
549 | { | |
68094e32 PO |
550 | int error; |
551 | ||
07d4e9af | 552 | if (!dev->active) |
9dd78466 | 553 | return 0; /* the device is already disabled */ |
1da177e4 | 554 | |
68094e32 PO |
555 | error = pnp_stop_dev(dev); |
556 | if (error) | |
557 | return error; | |
1da177e4 LT |
558 | |
559 | dev->active = 0; | |
1da177e4 LT |
560 | |
561 | /* release the resources so that other devices can use them */ | |
562 | down(&pnp_res_mutex); | |
563 | pnp_clean_resource_table(&dev->res); | |
564 | up(&pnp_res_mutex); | |
565 | ||
566 | return 1; | |
567 | } | |
568 | ||
569 | /** | |
570 | * pnp_resource_change - change one resource | |
571 | * @resource: pointer to resource to be changed | |
572 | * @start: start of region | |
573 | * @size: size of region | |
1da177e4 | 574 | */ |
b60ba834 | 575 | void pnp_resource_change(struct resource *resource, resource_size_t start, |
9dd78466 | 576 | resource_size_t size) |
1da177e4 | 577 | { |
1da177e4 LT |
578 | resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET); |
579 | resource->start = start; | |
580 | resource->end = start + size - 1; | |
581 | } | |
582 | ||
1da177e4 | 583 | EXPORT_SYMBOL(pnp_manual_config_dev); |
68094e32 PO |
584 | EXPORT_SYMBOL(pnp_start_dev); |
585 | EXPORT_SYMBOL(pnp_stop_dev); | |
1da177e4 LT |
586 | EXPORT_SYMBOL(pnp_activate_dev); |
587 | EXPORT_SYMBOL(pnp_disable_dev); | |
588 | EXPORT_SYMBOL(pnp_resource_change); | |
589 | EXPORT_SYMBOL(pnp_init_resource_table); |