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> | |
b3bd86e2 | 15 | #include <linux/mutex.h> |
1da177e4 LT |
16 | #include "base.h" |
17 | ||
b3bd86e2 | 18 | DEFINE_MUTEX(pnp_res_mutex); |
1da177e4 LT |
19 | |
20 | static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx) | |
21 | { | |
b60ba834 GKH |
22 | resource_size_t *start, *end; |
23 | unsigned long *flags; | |
1da177e4 | 24 | |
1da177e4 | 25 | if (idx >= PNP_MAX_PORT) { |
a05d0781 | 26 | dev_err(&dev->dev, "too many I/O port resources\n"); |
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) { |
a05d0781 | 67 | dev_err(&dev->dev, "too many memory resources\n"); |
1da177e4 LT |
68 | /* pretend we were successful so at least the manager won't try again */ |
69 | return 1; | |
70 | } | |
71 | ||
72 | /* check if this resource has been manually set, if so skip */ | |
73 | if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) | |
74 | return 1; | |
75 | ||
76 | start = &dev->res.mem_resource[idx].start; | |
77 | end = &dev->res.mem_resource[idx].end; | |
78 | flags = &dev->res.mem_resource[idx].flags; | |
79 | ||
80 | /* set the initial values */ | |
81 | *flags |= rule->flags | IORESOURCE_MEM; | |
9dd78466 | 82 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
83 | |
84 | /* convert pnp flags to standard Linux flags */ | |
85 | if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) | |
86 | *flags |= IORESOURCE_READONLY; | |
87 | if (rule->flags & IORESOURCE_MEM_CACHEABLE) | |
88 | *flags |= IORESOURCE_CACHEABLE; | |
89 | if (rule->flags & IORESOURCE_MEM_RANGELENGTH) | |
90 | *flags |= IORESOURCE_RANGELENGTH; | |
91 | if (rule->flags & IORESOURCE_MEM_SHADOWABLE) | |
92 | *flags |= IORESOURCE_SHADOWABLE; | |
93 | ||
94 | if (!rule->size) { | |
95 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 96 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
97 | } |
98 | ||
99 | *start = rule->min; | |
9dd78466 | 100 | *end = *start + rule->size - 1; |
1da177e4 LT |
101 | |
102 | /* run through until pnp_check_mem is happy */ | |
103 | while (!pnp_check_mem(dev, idx)) { | |
104 | *start += rule->align; | |
105 | *end = *start + rule->size - 1; | |
106 | if (*start > rule->max || !rule->align) | |
107 | return 0; | |
108 | } | |
109 | return 1; | |
110 | } | |
111 | ||
9dd78466 | 112 | static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) |
1da177e4 | 113 | { |
b60ba834 GKH |
114 | resource_size_t *start, *end; |
115 | unsigned long *flags; | |
1da177e4 LT |
116 | int i; |
117 | ||
118 | /* IRQ priority: this table is good for i386 */ | |
119 | static unsigned short xtab[16] = { | |
120 | 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2 | |
121 | }; | |
122 | ||
1da177e4 | 123 | if (idx >= PNP_MAX_IRQ) { |
a05d0781 | 124 | dev_err(&dev->dev, "too many IRQ resources\n"); |
1da177e4 LT |
125 | /* pretend we were successful so at least the manager won't try again */ |
126 | return 1; | |
127 | } | |
128 | ||
129 | /* check if this resource has been manually set, if so skip */ | |
130 | if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) | |
131 | return 1; | |
132 | ||
133 | start = &dev->res.irq_resource[idx].start; | |
134 | end = &dev->res.irq_resource[idx].end; | |
135 | flags = &dev->res.irq_resource[idx].flags; | |
136 | ||
137 | /* set the initial values */ | |
138 | *flags |= rule->flags | IORESOURCE_IRQ; | |
9dd78466 | 139 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
140 | |
141 | if (bitmap_empty(rule->map, PNP_IRQ_NR)) { | |
142 | *flags |= IORESOURCE_DISABLED; | |
9dd78466 | 143 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
144 | } |
145 | ||
146 | /* TBD: need check for >16 IRQ */ | |
147 | *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); | |
148 | if (*start < PNP_IRQ_NR) { | |
149 | *end = *start; | |
150 | return 1; | |
151 | } | |
152 | for (i = 0; i < 16; i++) { | |
9dd78466 | 153 | if (test_bit(xtab[i], rule->map)) { |
1da177e4 | 154 | *start = *end = xtab[i]; |
9dd78466 | 155 | if (pnp_check_irq(dev, idx)) |
1da177e4 LT |
156 | return 1; |
157 | } | |
158 | } | |
159 | return 0; | |
160 | } | |
161 | ||
7ef36390 | 162 | static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) |
1da177e4 | 163 | { |
b60ba834 GKH |
164 | resource_size_t *start, *end; |
165 | unsigned long *flags; | |
1da177e4 LT |
166 | int i; |
167 | ||
168 | /* DMA priority: this table is good for i386 */ | |
169 | static unsigned short xtab[8] = { | |
170 | 1, 3, 5, 6, 7, 0, 2, 4 | |
171 | }; | |
172 | ||
1da177e4 | 173 | if (idx >= PNP_MAX_DMA) { |
a05d0781 | 174 | dev_err(&dev->dev, "too many DMA resources\n"); |
7ef36390 | 175 | return; |
1da177e4 LT |
176 | } |
177 | ||
178 | /* check if this resource has been manually set, if so skip */ | |
179 | if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) | |
7ef36390 | 180 | return; |
1da177e4 LT |
181 | |
182 | start = &dev->res.dma_resource[idx].start; | |
183 | end = &dev->res.dma_resource[idx].end; | |
184 | flags = &dev->res.dma_resource[idx].flags; | |
185 | ||
186 | /* set the initial values */ | |
187 | *flags |= rule->flags | IORESOURCE_DMA; | |
9dd78466 | 188 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 | 189 | |
1da177e4 | 190 | for (i = 0; i < 8; i++) { |
9dd78466 | 191 | if (rule->map & (1 << xtab[i])) { |
1da177e4 | 192 | *start = *end = xtab[i]; |
9dd78466 | 193 | if (pnp_check_dma(dev, idx)) |
7ef36390 | 194 | return; |
1da177e4 LT |
195 | } |
196 | } | |
7ef36390 JB |
197 | #ifdef MAX_DMA_CHANNELS |
198 | *start = *end = MAX_DMA_CHANNELS; | |
199 | #endif | |
200 | *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; | |
1da177e4 LT |
201 | } |
202 | ||
203 | /** | |
204 | * pnp_init_resources - Resets a resource table to default values. | |
205 | * @table: pointer to the desired resource table | |
1da177e4 LT |
206 | */ |
207 | void pnp_init_resource_table(struct pnp_resource_table *table) | |
208 | { | |
209 | int idx; | |
07d4e9af | 210 | |
1da177e4 LT |
211 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
212 | table->irq_resource[idx].name = NULL; | |
213 | table->irq_resource[idx].start = -1; | |
214 | table->irq_resource[idx].end = -1; | |
9dd78466 BH |
215 | table->irq_resource[idx].flags = |
216 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
217 | } |
218 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
219 | table->dma_resource[idx].name = NULL; | |
220 | table->dma_resource[idx].start = -1; | |
221 | table->dma_resource[idx].end = -1; | |
9dd78466 BH |
222 | table->dma_resource[idx].flags = |
223 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
224 | } |
225 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
226 | table->port_resource[idx].name = NULL; | |
227 | table->port_resource[idx].start = 0; | |
228 | table->port_resource[idx].end = 0; | |
9dd78466 BH |
229 | table->port_resource[idx].flags = |
230 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
231 | } |
232 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
233 | table->mem_resource[idx].name = NULL; | |
234 | table->mem_resource[idx].start = 0; | |
235 | table->mem_resource[idx].end = 0; | |
9dd78466 BH |
236 | table->mem_resource[idx].flags = |
237 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
238 | } |
239 | } | |
240 | ||
241 | /** | |
242 | * pnp_clean_resources - clears resources that were not manually set | |
67be2dd1 | 243 | * @res: the resources to clean |
1da177e4 | 244 | */ |
9dd78466 | 245 | static void pnp_clean_resource_table(struct pnp_resource_table *res) |
1da177e4 LT |
246 | { |
247 | int idx; | |
07d4e9af | 248 | |
1da177e4 LT |
249 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
250 | if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO)) | |
251 | continue; | |
252 | res->irq_resource[idx].start = -1; | |
253 | res->irq_resource[idx].end = -1; | |
9dd78466 BH |
254 | res->irq_resource[idx].flags = |
255 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
256 | } |
257 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
258 | if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO)) | |
259 | continue; | |
260 | res->dma_resource[idx].start = -1; | |
261 | res->dma_resource[idx].end = -1; | |
9dd78466 BH |
262 | res->dma_resource[idx].flags = |
263 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
264 | } |
265 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
266 | if (!(res->port_resource[idx].flags & IORESOURCE_AUTO)) | |
267 | continue; | |
268 | res->port_resource[idx].start = 0; | |
269 | res->port_resource[idx].end = 0; | |
9dd78466 BH |
270 | res->port_resource[idx].flags = |
271 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
272 | } |
273 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
274 | if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO)) | |
275 | continue; | |
276 | res->mem_resource[idx].start = 0; | |
277 | res->mem_resource[idx].end = 0; | |
9dd78466 BH |
278 | res->mem_resource[idx].flags = |
279 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
280 | } |
281 | } | |
282 | ||
283 | /** | |
284 | * pnp_assign_resources - assigns resources to the device based on the specified dependent number | |
285 | * @dev: pointer to the desired device | |
286 | * @depnum: the dependent function number | |
287 | * | |
288 | * Only set depnum to 0 if the device does not have dependent options. | |
289 | */ | |
290 | static int pnp_assign_resources(struct pnp_dev *dev, int depnum) | |
291 | { | |
292 | struct pnp_port *port; | |
293 | struct pnp_mem *mem; | |
294 | struct pnp_irq *irq; | |
295 | struct pnp_dma *dma; | |
296 | int nport = 0, nmem = 0, nirq = 0, ndma = 0; | |
297 | ||
298 | if (!pnp_can_configure(dev)) | |
299 | return -ENODEV; | |
300 | ||
b3bd86e2 | 301 | mutex_lock(&pnp_res_mutex); |
9dd78466 | 302 | pnp_clean_resource_table(&dev->res); /* start with a fresh slate */ |
1da177e4 LT |
303 | if (dev->independent) { |
304 | port = dev->independent->port; | |
305 | mem = dev->independent->mem; | |
306 | irq = dev->independent->irq; | |
307 | dma = dev->independent->dma; | |
308 | while (port) { | |
309 | if (!pnp_assign_port(dev, port, nport)) | |
310 | goto fail; | |
311 | nport++; | |
312 | port = port->next; | |
313 | } | |
314 | while (mem) { | |
315 | if (!pnp_assign_mem(dev, mem, nmem)) | |
316 | goto fail; | |
317 | nmem++; | |
318 | mem = mem->next; | |
319 | } | |
320 | while (irq) { | |
321 | if (!pnp_assign_irq(dev, irq, nirq)) | |
322 | goto fail; | |
323 | nirq++; | |
324 | irq = irq->next; | |
325 | } | |
326 | while (dma) { | |
7ef36390 | 327 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
328 | ndma++; |
329 | dma = dma->next; | |
330 | } | |
331 | } | |
332 | ||
333 | if (depnum) { | |
334 | struct pnp_option *dep; | |
335 | int i; | |
9dd78466 BH |
336 | for (i = 1, dep = dev->dependent; i < depnum; |
337 | i++, dep = dep->next) | |
338 | if (!dep) | |
1da177e4 | 339 | goto fail; |
9dd78466 | 340 | port = dep->port; |
1da177e4 LT |
341 | mem = dep->mem; |
342 | irq = dep->irq; | |
343 | dma = dep->dma; | |
344 | while (port) { | |
345 | if (!pnp_assign_port(dev, port, nport)) | |
346 | goto fail; | |
347 | nport++; | |
348 | port = port->next; | |
349 | } | |
350 | while (mem) { | |
351 | if (!pnp_assign_mem(dev, mem, nmem)) | |
352 | goto fail; | |
353 | nmem++; | |
354 | mem = mem->next; | |
355 | } | |
356 | while (irq) { | |
357 | if (!pnp_assign_irq(dev, irq, nirq)) | |
358 | goto fail; | |
359 | nirq++; | |
360 | irq = irq->next; | |
361 | } | |
362 | while (dma) { | |
7ef36390 | 363 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
364 | ndma++; |
365 | dma = dma->next; | |
366 | } | |
367 | } else if (dev->dependent) | |
368 | goto fail; | |
369 | ||
b3bd86e2 | 370 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
371 | return 1; |
372 | ||
1e0aa9ad | 373 | fail: |
1da177e4 | 374 | pnp_clean_resource_table(&dev->res); |
b3bd86e2 | 375 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
376 | return 0; |
377 | } | |
378 | ||
379 | /** | |
380 | * pnp_manual_config_dev - Disables Auto Config and Manually sets the resource table | |
381 | * @dev: pointer to the desired device | |
382 | * @res: pointer to the new resource config | |
3d41088f | 383 | * @mode: 0 or PNP_CONFIG_FORCE |
1da177e4 LT |
384 | * |
385 | * This function can be used by drivers that want to manually set thier resources. | |
386 | */ | |
9dd78466 BH |
387 | int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, |
388 | int mode) | |
1da177e4 LT |
389 | { |
390 | int i; | |
9dd78466 | 391 | struct pnp_resource_table *bak; |
07d4e9af | 392 | |
1da177e4 LT |
393 | if (!pnp_can_configure(dev)) |
394 | return -ENODEV; | |
395 | bak = pnp_alloc(sizeof(struct pnp_resource_table)); | |
396 | if (!bak) | |
397 | return -ENOMEM; | |
398 | *bak = dev->res; | |
399 | ||
b3bd86e2 | 400 | mutex_lock(&pnp_res_mutex); |
1da177e4 LT |
401 | dev->res = *res; |
402 | if (!(mode & PNP_CONFIG_FORCE)) { | |
403 | for (i = 0; i < PNP_MAX_PORT; i++) { | |
9dd78466 | 404 | if (!pnp_check_port(dev, i)) |
1da177e4 LT |
405 | goto fail; |
406 | } | |
407 | for (i = 0; i < PNP_MAX_MEM; i++) { | |
9dd78466 | 408 | if (!pnp_check_mem(dev, i)) |
1da177e4 LT |
409 | goto fail; |
410 | } | |
411 | for (i = 0; i < PNP_MAX_IRQ; i++) { | |
9dd78466 | 412 | if (!pnp_check_irq(dev, i)) |
1da177e4 LT |
413 | goto fail; |
414 | } | |
415 | for (i = 0; i < PNP_MAX_DMA; i++) { | |
9dd78466 | 416 | if (!pnp_check_dma(dev, i)) |
1da177e4 LT |
417 | goto fail; |
418 | } | |
419 | } | |
b3bd86e2 | 420 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
421 | |
422 | kfree(bak); | |
423 | return 0; | |
424 | ||
1e0aa9ad | 425 | fail: |
1da177e4 | 426 | dev->res = *bak; |
b3bd86e2 | 427 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
428 | kfree(bak); |
429 | return -EINVAL; | |
430 | } | |
431 | ||
432 | /** | |
433 | * pnp_auto_config_dev - automatically assigns resources to a device | |
434 | * @dev: pointer to the desired device | |
1da177e4 LT |
435 | */ |
436 | int pnp_auto_config_dev(struct pnp_dev *dev) | |
437 | { | |
438 | struct pnp_option *dep; | |
439 | int i = 1; | |
440 | ||
9dd78466 | 441 | if (!pnp_can_configure(dev)) { |
a05d0781 | 442 | dev_dbg(&dev->dev, "configuration not supported\n"); |
1da177e4 LT |
443 | return -ENODEV; |
444 | } | |
445 | ||
446 | if (!dev->dependent) { | |
447 | if (pnp_assign_resources(dev, 0)) | |
448 | return 0; | |
449 | } else { | |
450 | dep = dev->dependent; | |
451 | do { | |
452 | if (pnp_assign_resources(dev, i)) | |
453 | return 0; | |
454 | dep = dep->next; | |
455 | i++; | |
456 | } while (dep); | |
457 | } | |
458 | ||
a05d0781 | 459 | dev_err(&dev->dev, "unable to assign resources\n"); |
1da177e4 LT |
460 | return -EBUSY; |
461 | } | |
462 | ||
68094e32 PO |
463 | /** |
464 | * pnp_start_dev - low-level start of the PnP device | |
465 | * @dev: pointer to the desired device | |
466 | * | |
07d4e9af | 467 | * assumes that resources have already been allocated |
68094e32 | 468 | */ |
68094e32 PO |
469 | int pnp_start_dev(struct pnp_dev *dev) |
470 | { | |
471 | if (!pnp_can_write(dev)) { | |
a05d0781 | 472 | dev_dbg(&dev->dev, "activation not supported\n"); |
68094e32 PO |
473 | return -EINVAL; |
474 | } | |
475 | ||
9dd78466 | 476 | if (dev->protocol->set(dev, &dev->res) < 0) { |
a05d0781 | 477 | dev_err(&dev->dev, "activation failed\n"); |
68094e32 PO |
478 | return -EIO; |
479 | } | |
480 | ||
a05d0781 | 481 | dev_info(&dev->dev, "activated\n"); |
68094e32 PO |
482 | return 0; |
483 | } | |
484 | ||
485 | /** | |
486 | * pnp_stop_dev - low-level disable of the PnP device | |
487 | * @dev: pointer to the desired device | |
488 | * | |
489 | * does not free resources | |
490 | */ | |
68094e32 PO |
491 | int pnp_stop_dev(struct pnp_dev *dev) |
492 | { | |
493 | if (!pnp_can_disable(dev)) { | |
a05d0781 | 494 | dev_dbg(&dev->dev, "disabling not supported\n"); |
68094e32 PO |
495 | return -EINVAL; |
496 | } | |
9dd78466 | 497 | if (dev->protocol->disable(dev) < 0) { |
a05d0781 | 498 | dev_err(&dev->dev, "disable failed\n"); |
68094e32 PO |
499 | return -EIO; |
500 | } | |
501 | ||
a05d0781 | 502 | dev_info(&dev->dev, "disabled\n"); |
68094e32 PO |
503 | return 0; |
504 | } | |
505 | ||
1da177e4 LT |
506 | /** |
507 | * pnp_activate_dev - activates a PnP device for use | |
508 | * @dev: pointer to the desired device | |
509 | * | |
510 | * does not validate or set resources so be careful. | |
511 | */ | |
512 | int pnp_activate_dev(struct pnp_dev *dev) | |
513 | { | |
68094e32 PO |
514 | int error; |
515 | ||
07d4e9af | 516 | if (dev->active) |
cc8259a6 | 517 | return 0; |
1da177e4 LT |
518 | |
519 | /* ensure resources are allocated */ | |
520 | if (pnp_auto_config_dev(dev)) | |
521 | return -EBUSY; | |
522 | ||
68094e32 PO |
523 | error = pnp_start_dev(dev); |
524 | if (error) | |
525 | return error; | |
1da177e4 LT |
526 | |
527 | dev->active = 1; | |
cc8259a6 | 528 | return 0; |
1da177e4 LT |
529 | } |
530 | ||
531 | /** | |
532 | * pnp_disable_dev - disables device | |
533 | * @dev: pointer to the desired device | |
534 | * | |
535 | * inform the correct pnp protocol so that resources can be used by other devices | |
536 | */ | |
537 | int pnp_disable_dev(struct pnp_dev *dev) | |
538 | { | |
68094e32 PO |
539 | int error; |
540 | ||
07d4e9af | 541 | if (!dev->active) |
cc8259a6 | 542 | return 0; |
1da177e4 | 543 | |
68094e32 PO |
544 | error = pnp_stop_dev(dev); |
545 | if (error) | |
546 | return error; | |
1da177e4 LT |
547 | |
548 | dev->active = 0; | |
1da177e4 LT |
549 | |
550 | /* release the resources so that other devices can use them */ | |
b3bd86e2 | 551 | mutex_lock(&pnp_res_mutex); |
1da177e4 | 552 | pnp_clean_resource_table(&dev->res); |
b3bd86e2 | 553 | mutex_unlock(&pnp_res_mutex); |
1da177e4 | 554 | |
cc8259a6 | 555 | return 0; |
1da177e4 LT |
556 | } |
557 | ||
558 | /** | |
559 | * pnp_resource_change - change one resource | |
560 | * @resource: pointer to resource to be changed | |
561 | * @start: start of region | |
562 | * @size: size of region | |
1da177e4 | 563 | */ |
b60ba834 | 564 | void pnp_resource_change(struct resource *resource, resource_size_t start, |
9dd78466 | 565 | resource_size_t size) |
1da177e4 | 566 | { |
1da177e4 LT |
567 | resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET); |
568 | resource->start = start; | |
569 | resource->end = start + size - 1; | |
570 | } | |
571 | ||
1da177e4 | 572 | EXPORT_SYMBOL(pnp_manual_config_dev); |
68094e32 PO |
573 | EXPORT_SYMBOL(pnp_start_dev); |
574 | EXPORT_SYMBOL(pnp_stop_dev); | |
1da177e4 LT |
575 | EXPORT_SYMBOL(pnp_activate_dev); |
576 | EXPORT_SYMBOL(pnp_disable_dev); | |
577 | EXPORT_SYMBOL(pnp_resource_change); | |
578 | EXPORT_SYMBOL(pnp_init_resource_table); |